APPARATUS TO DRIVE VARIOUS FASTENING MEANS
United States Patent 3633811
This apparatus has means for driving fastening means such as staples, nails and/or pins. It has a guide channel arranged to guide the drive plunger and also staples, nails or pins. The magazine rail has a pusher slidable thereon and arranged to urge staples, nails or pins to the guide channel.
US Patent References:
Full throw mechanism for nailing machines
Granfield - November 1952 - 2618778
Stapling machine for simultaneously inserting at least two staples
Timmerbeil - September 1955 - 2716749
Nailer
DeMan - February 1962 - 3022509
Fastening device
Pazan - June 1962 - 3037207
Full throw mechanism for nailing machines
Granfield - November 1952 - 2618778
Stapling machine for simultaneously inserting at least two staples
Timmerbeil - September 1955 - 2716749
Nailer
DeMan - February 1962 - 3022509
Fastening device
Pazan - June 1962 - 3037207
Application Number:
05/009890
Publication Date:
01/11/1972
Filing Date:
02/09/1970
View Patent Images:
Export Citation:
Assignee:
Joh, Freidrich Behrens (Ahrensburg, DT)
Primary Class:
Other Classes:
227/120
International Classes:
B25C1/00; B25C5/16; B25C5/00; B25C5/06
Field of Search:
227/98,109,120,130
Primary Examiner:
Custer Jr., Granville Y.
Claims:
What is claimed is
1. Apparatus to drive fastening means such as staples, nails, pins or the like, comprising a drive plunger, structural means to define a guiding channel for said fastening means and for said plunger, and a magazine to accommodate the fastening means, said magazine comprising a guide rail leading to said channel for guiding fastening means on said rail, to said channel, spring-biased pusher means on said rail to urge fastening means on the rail in a direction toward the said guiding channel, said guide rail being formed with a longitudinally extending inner slot intermediate the sides of the rail, for the accommodation of shanks of nails and/or pins adapted to be urged toward said channel by said pusher means, said pusher means comprising a pusher slidable on the rail and having a pair of outer flanges disposed at opposite sides of the rail, a top web interconnecting said pair of flanges and disposed at the top of the rail, and an inner flange extending from said top web in parallel relation to said outer flanges, and being disposed within said slot, and means disposed at one surface of said longitudinally extending inner slot to exert resilient contact pressure on drive pins or on shanks of drive nails passing through said inner slot of said rail.
2. Apparatus to drive fastening means such as staples, nails, pins or the like, comprising a drive plunger, structural means to define a guiding channel for said fastening means and for said plunger, and a magazine to accommodate the fastening means, said magazine comprising a guide rail leading to said channel for guiding fastening means on said rail to said channel, spring-biased pusher means on said rail to urge fastening means on the rail in a direction toward the said guiding channel, said guide rail being formed with a longitudinally extending inner slot intermediate the sides of the rail, for the accommodation of shanks of nails and/or pins adapted to be urged toward said channel by said pusher means, said structural means defining said guide channel, comprising two end plates, means to interconnect said plates, one said end plates being provided with a recess of a width corresponding to the width of the plunger, and extending in the drive direction of the plunger, the other end plate being provided with a recess having a width less than the width of the plunger and centered with respect to the recess in the first plate, to accommodate heads of nails to be driven.
3. The combination of claim 2, said other plate having a groove in a surface of the recess thereof, to guide pins to be driven in.
4. The combination of claim 3, said groove having a cross-sectional area in the form of a triangle of equal legs, the apex of said groove being disposed opposite said inner slot and the base of the triangle being disposed in the plane of said surface of the recess of said other plate.
5. The combination of claim 1, said last-mentioned means comprising a plate disposed in a recess in said one surface of said inner slot, and spring means in said rail to press said plate against said pins or shanks.
6. The combination of claim 2, and means disposed at one surface of said longitudinally extending inner slot to exert resilient contact pressure on drive pins or on shanks of drive-in nails passing through said inner slot of said rail.
7. The combination of claim 3, and means disposed at one surface of said longitudinally extending inner slot to exert resilient contact pressure on drive pins or on shanks of drive-in nails passing through said inner slot of said rail.
8. Apparatus to drive fastening means such as staples, nails, pins or the like, comprising a drive plunger structural means to define a guiding channel for said fastening means and for said plunger, and a magazine to accommodate the fastening means, said magazine comprising a guide rail leading to said channel for guiding fastening means on said rail, to said channel, spring-biased pusher means on said rail to urge fastening means on the rail in a direction toward the said guiding channel, said guide rail being formed with a longitudinally extending inner slot intermediate the sides of the rail, for the accommodation of shanks of nails and/or pins adapted to be urged toward said channel by said pusher means, said guide channel comprising a first recess on one side of the channel, of a width corresponding to the width of the plunger and extending in the drive direction of the plunger, and a second recess on the other side of the channel of a width less than the width of said plunger and centered with respect to said first recess and extending therefrom, to accommodate heads of nails to be driven.
9. The combination of claim 8, said channel further comprising a groove, centered with respect to said second recess, to guide pins to be driven.
1. Apparatus to drive fastening means such as staples, nails, pins or the like, comprising a drive plunger, structural means to define a guiding channel for said fastening means and for said plunger, and a magazine to accommodate the fastening means, said magazine comprising a guide rail leading to said channel for guiding fastening means on said rail, to said channel, spring-biased pusher means on said rail to urge fastening means on the rail in a direction toward the said guiding channel, said guide rail being formed with a longitudinally extending inner slot intermediate the sides of the rail, for the accommodation of shanks of nails and/or pins adapted to be urged toward said channel by said pusher means, said pusher means comprising a pusher slidable on the rail and having a pair of outer flanges disposed at opposite sides of the rail, a top web interconnecting said pair of flanges and disposed at the top of the rail, and an inner flange extending from said top web in parallel relation to said outer flanges, and being disposed within said slot, and means disposed at one surface of said longitudinally extending inner slot to exert resilient contact pressure on drive pins or on shanks of drive nails passing through said inner slot of said rail.
2. Apparatus to drive fastening means such as staples, nails, pins or the like, comprising a drive plunger, structural means to define a guiding channel for said fastening means and for said plunger, and a magazine to accommodate the fastening means, said magazine comprising a guide rail leading to said channel for guiding fastening means on said rail to said channel, spring-biased pusher means on said rail to urge fastening means on the rail in a direction toward the said guiding channel, said guide rail being formed with a longitudinally extending inner slot intermediate the sides of the rail, for the accommodation of shanks of nails and/or pins adapted to be urged toward said channel by said pusher means, said structural means defining said guide channel, comprising two end plates, means to interconnect said plates, one said end plates being provided with a recess of a width corresponding to the width of the plunger, and extending in the drive direction of the plunger, the other end plate being provided with a recess having a width less than the width of the plunger and centered with respect to the recess in the first plate, to accommodate heads of nails to be driven.
3. The combination of claim 2, said other plate having a groove in a surface of the recess thereof, to guide pins to be driven in.
4. The combination of claim 3, said groove having a cross-sectional area in the form of a triangle of equal legs, the apex of said groove being disposed opposite said inner slot and the base of the triangle being disposed in the plane of said surface of the recess of said other plate.
5. The combination of claim 1, said last-mentioned means comprising a plate disposed in a recess in said one surface of said inner slot, and spring means in said rail to press said plate against said pins or shanks.
6. The combination of claim 2, and means disposed at one surface of said longitudinally extending inner slot to exert resilient contact pressure on drive pins or on shanks of drive-in nails passing through said inner slot of said rail.
7. The combination of claim 3, and means disposed at one surface of said longitudinally extending inner slot to exert resilient contact pressure on drive pins or on shanks of drive-in nails passing through said inner slot of said rail.
8. Apparatus to drive fastening means such as staples, nails, pins or the like, comprising a drive plunger structural means to define a guiding channel for said fastening means and for said plunger, and a magazine to accommodate the fastening means, said magazine comprising a guide rail leading to said channel for guiding fastening means on said rail, to said channel, spring-biased pusher means on said rail to urge fastening means on the rail in a direction toward the said guiding channel, said guide rail being formed with a longitudinally extending inner slot intermediate the sides of the rail, for the accommodation of shanks of nails and/or pins adapted to be urged toward said channel by said pusher means, said guide channel comprising a first recess on one side of the channel, of a width corresponding to the width of the plunger and extending in the drive direction of the plunger, and a second recess on the other side of the channel of a width less than the width of said plunger and centered with respect to said first recess and extending therefrom, to accommodate heads of nails to be driven.
9. The combination of claim 8, said channel further comprising a groove, centered with respect to said second recess, to guide pins to be driven.
Description:
The invention relates to an apparatus to drive various fastening means such as staples of various back widths, nails, pins or the like, into materials of various types.
Drive apparatuses are in general operated by compressed air. But apparatuses are also commercially available in which the drive stem is driven by means of an electromagnet. With smaller apparatuses, a manually tensioned compression spring is provided as a drive means.
Independently of the type of drive, the apparatus comprise a magazine for the fastening means, in which the latter are guided while disposed in series arrangement. The magazine encloses a rail which guides the fastening means and a spring-biased pusher which rests on the guide rail, pressing the fastening means into the guide channel of the drive plunger; after actuation of the release trigger, plunger drives the fastening means into the workpiece.
All known types of drive apparatuses are designed for the accommodation of only one fastening means. With said one apparatus it is possible to drive nails with like heads and like shaft widths but of different lengths, or with another apparatus it is possible to drive staples of like back widths and different wire gauges but of different lengths, it is true. But it is not possible to drive nails and staples with one and the same apparatus.
It is the object of the present invention to provide a drive apparatus by means of which various types of fastening means may be driven into workpieces, without the magazine and/or the parts of the apparatus forming the drive channel having to be exchanged, but with only the other type of fastening means having to be placed into the magazine.
To solve the problem, the saddle-shaped guide rail, in accordance with the invention, is provided with a recess and the pusher is designed in the shape of a double-U, so that both staples of major back-width gripping around the guide rail and nails and pins guided in the center recess, may be driven. In order to be able to safely guide the pins and nails, the side of the guide or drive channel, respectively, is provided with various guiding grooves. The recess in the saddle, the inner web of the pusher, and the guiding grooves may be centrally as well as unilaterally offset, such offset arrangement facilitating the insertion of the pins or nails. To secure the pins in the recess of the guide rail against upward displacement, a resilient contact pressure device is provided in the recess, engaging the nail and pin shafts.
Drive apparatuses are working according to the top or bottom charging principle. The idea of the invention may be realized with both types of apparatus, in which connection it must be taken into consideration that nails having distinct heads cannot be driven with an apparatus working in accordance with a bottom charging principle.
In the drawing:
FIG. 1 shows a fragmentary sectional view of a compressed air-operated drive apparatus,
FIG. 2 is a perspective view of the stem guiding canal and the guide rail according to the invention,
FIG. 3 shows a cross-sectional view taken in the direction of the arrows A--A of a known guide rail with pusher,
FIG. 3a shows a cross-sectional view similar to that of FIG. 3 taken of a guide rail in accordance with the invention,
FIG. 4 shows a staple and a bar of staples,
FIG. 5 shows a nail and a bar of nails,
FIG. 6 shows a pin and a bar of pins,
FIG. 7 shows a sectional view taken of a magazine filled with broad staples, and the drive channel in the direction of the arrows B--B,
FIG. 8 shows a sectional view similar to that of FIG. 7 with nails according to FIG. 5,
FIG. 9 shows a sectional view as in FIG. 7 with pins according to FIG. 6; and
FIG. 10 is a horizontal cross-sectional view showing the plunger in the drive channel.
FIG. 1 shows a drive apparatus in accordance with the invention. A space 3 above the piston 4 is communicating with a compressed air container through a supply line 1 and a valve arrangement (not shown) actuated by a trigger 2. A drive plunger 5 is fastened at the underside of the piston which is guided through an insert 6. Two recesses 7a and 8a extending in the drive direction in two end plates 7 and 8 define the stem guiding and shooting canal, respectively, into which channel, fastening means may enter sideways. A saddle-shaped guide rail 10 is arranged on a bottom plate 9, said guide rail projecting into a recess 8b of the end plate 8 as far as the plane of the recess 8a defining the drive channel. A staple pusher 12 biased by a torsion spring 11 engages the bar of fastening means guided by the rail, pressing it in a direction towards the drive channel. The torsion spring 11 is arranged on a shaft 13 which is connected with the apparatus housing.
In contrast to the known saddle-shaped guide rails (FIG. 3a) which were adapted to guide only staples of like back widths, the guide rail 10 according to the invention (FIG. 2) which is capable of accommodating both staple bars 14 (FIG. 4) of different shaft lengths and bars of nails 15 (FIG. 5) or bars of pins 16 (FIG. 6), is provided with a slot 17 (FIGS. 2 and 3). The pusher 12 in the form of a double-U comprises two outer flanges 12a, a web 12b and an inner flange 12c; the flanges 12a engage around the guide rail 10, the web 12b rests on the rail, and the inner flange 12c engages within the guide rail slot or recess 17. In the described embodiment, the recess 17 is arranged in the center of the guide rail 10 and, therefore, the inner flange 12c is fastened on the center of the web 12b.
The outer flanges 12a and the web 12b of the shoe 12 cooperate with the legs 14a and the back 14b of the broader staples 14; the web 12b and the inner flange 12c cooperate with the transverse web 15b and the shank 15a of the T-shaped nail 15, and the inner flange 12c cooperates with the pin 16.
The recess 8a with the rectangular cross-sectional area is designed in such a manner that it guides the stem and has dimensions corresponding to the dimensions of the staple back 14b with slight clearance in width and length (FIG. 4). The recess 7a is likewise rectangular with the length and width being smaller than that of the recess 8a. In the longitudinal groove 7a extending through the end plate, the head 15b of the individual nail of the bar of nails (FIG. 8) is guides. The end plate 7 comprises a second longitudinal groove 7b inside the recess 7a with a cross section area in the form of a triangle of equal legs, with the base of the triangle lying in the limiting plane of the recess 7a and the peak of the recess 7b disposed opposite the inner web 12c of the pusher 12. The opening angle of the groove is selected to be such that the foremost pin 16 having a circular cross-sectional area is safely guided in the groove 7b (FIG. 9). The shaft 15a the nail 15 is additionally guided in the groove 7b. The plates 7 and 8 are interconnected with each other by means of screws 18, for example. The recess 7b may also be designed to have a semicircular shape.
In order to be able to process also pins of different lengths, displacement of the pins within the recess must be avoided, A recess 19 with rectangular cross-sectional area is provided in the one side wall of the slot or recess 17, with some bores 20 arranged vertically thereof. Springs 21 are seated in the bores 20, with a strip or plate 22 supported with play in the recess 19 fastened thereat. The strip presses the strip of pins 16 against the opposite wall of the slot or recess 17, thus preventing displacement of the strip upwardly in the recess when handling the apparatus.
Drive apparatuses are in general operated by compressed air. But apparatuses are also commercially available in which the drive stem is driven by means of an electromagnet. With smaller apparatuses, a manually tensioned compression spring is provided as a drive means.
Independently of the type of drive, the apparatus comprise a magazine for the fastening means, in which the latter are guided while disposed in series arrangement. The magazine encloses a rail which guides the fastening means and a spring-biased pusher which rests on the guide rail, pressing the fastening means into the guide channel of the drive plunger; after actuation of the release trigger, plunger drives the fastening means into the workpiece.
All known types of drive apparatuses are designed for the accommodation of only one fastening means. With said one apparatus it is possible to drive nails with like heads and like shaft widths but of different lengths, or with another apparatus it is possible to drive staples of like back widths and different wire gauges but of different lengths, it is true. But it is not possible to drive nails and staples with one and the same apparatus.
It is the object of the present invention to provide a drive apparatus by means of which various types of fastening means may be driven into workpieces, without the magazine and/or the parts of the apparatus forming the drive channel having to be exchanged, but with only the other type of fastening means having to be placed into the magazine.
To solve the problem, the saddle-shaped guide rail, in accordance with the invention, is provided with a recess and the pusher is designed in the shape of a double-U, so that both staples of major back-width gripping around the guide rail and nails and pins guided in the center recess, may be driven. In order to be able to safely guide the pins and nails, the side of the guide or drive channel, respectively, is provided with various guiding grooves. The recess in the saddle, the inner web of the pusher, and the guiding grooves may be centrally as well as unilaterally offset, such offset arrangement facilitating the insertion of the pins or nails. To secure the pins in the recess of the guide rail against upward displacement, a resilient contact pressure device is provided in the recess, engaging the nail and pin shafts.
Drive apparatuses are working according to the top or bottom charging principle. The idea of the invention may be realized with both types of apparatus, in which connection it must be taken into consideration that nails having distinct heads cannot be driven with an apparatus working in accordance with a bottom charging principle.
In the drawing:
FIG. 1 shows a fragmentary sectional view of a compressed air-operated drive apparatus,
FIG. 2 is a perspective view of the stem guiding canal and the guide rail according to the invention,
FIG. 3 shows a cross-sectional view taken in the direction of the arrows A--A of a known guide rail with pusher,
FIG. 3a shows a cross-sectional view similar to that of FIG. 3 taken of a guide rail in accordance with the invention,
FIG. 4 shows a staple and a bar of staples,
FIG. 5 shows a nail and a bar of nails,
FIG. 6 shows a pin and a bar of pins,
FIG. 7 shows a sectional view taken of a magazine filled with broad staples, and the drive channel in the direction of the arrows B--B,
FIG. 8 shows a sectional view similar to that of FIG. 7 with nails according to FIG. 5,
FIG. 9 shows a sectional view as in FIG. 7 with pins according to FIG. 6; and
FIG. 10 is a horizontal cross-sectional view showing the plunger in the drive channel.
FIG. 1 shows a drive apparatus in accordance with the invention. A space 3 above the piston 4 is communicating with a compressed air container through a supply line 1 and a valve arrangement (not shown) actuated by a trigger 2. A drive plunger 5 is fastened at the underside of the piston which is guided through an insert 6. Two recesses 7a and 8a extending in the drive direction in two end plates 7 and 8 define the stem guiding and shooting canal, respectively, into which channel, fastening means may enter sideways. A saddle-shaped guide rail 10 is arranged on a bottom plate 9, said guide rail projecting into a recess 8b of the end plate 8 as far as the plane of the recess 8a defining the drive channel. A staple pusher 12 biased by a torsion spring 11 engages the bar of fastening means guided by the rail, pressing it in a direction towards the drive channel. The torsion spring 11 is arranged on a shaft 13 which is connected with the apparatus housing.
In contrast to the known saddle-shaped guide rails (FIG. 3a) which were adapted to guide only staples of like back widths, the guide rail 10 according to the invention (FIG. 2) which is capable of accommodating both staple bars 14 (FIG. 4) of different shaft lengths and bars of nails 15 (FIG. 5) or bars of pins 16 (FIG. 6), is provided with a slot 17 (FIGS. 2 and 3). The pusher 12 in the form of a double-U comprises two outer flanges 12a, a web 12b and an inner flange 12c; the flanges 12a engage around the guide rail 10, the web 12b rests on the rail, and the inner flange 12c engages within the guide rail slot or recess 17. In the described embodiment, the recess 17 is arranged in the center of the guide rail 10 and, therefore, the inner flange 12c is fastened on the center of the web 12b.
The outer flanges 12a and the web 12b of the shoe 12 cooperate with the legs 14a and the back 14b of the broader staples 14; the web 12b and the inner flange 12c cooperate with the transverse web 15b and the shank 15a of the T-shaped nail 15, and the inner flange 12c cooperates with the pin 16.
The recess 8a with the rectangular cross-sectional area is designed in such a manner that it guides the stem and has dimensions corresponding to the dimensions of the staple back 14b with slight clearance in width and length (FIG. 4). The recess 7a is likewise rectangular with the length and width being smaller than that of the recess 8a. In the longitudinal groove 7a extending through the end plate, the head 15b of the individual nail of the bar of nails (FIG. 8) is guides. The end plate 7 comprises a second longitudinal groove 7b inside the recess 7a with a cross section area in the form of a triangle of equal legs, with the base of the triangle lying in the limiting plane of the recess 7a and the peak of the recess 7b disposed opposite the inner web 12c of the pusher 12. The opening angle of the groove is selected to be such that the foremost pin 16 having a circular cross-sectional area is safely guided in the groove 7b (FIG. 9). The shaft 15a the nail 15 is additionally guided in the groove 7b. The plates 7 and 8 are interconnected with each other by means of screws 18, for example. The recess 7b may also be designed to have a semicircular shape.
In order to be able to process also pins of different lengths, displacement of the pins within the recess must be avoided, A recess 19 with rectangular cross-sectional area is provided in the one side wall of the slot or recess 17, with some bores 20 arranged vertically thereof. Springs 21 are seated in the bores 20, with a strip or plate 22 supported with play in the recess 19 fastened thereat. The strip presses the strip of pins 16 against the opposite wall of the slot or recess 17, thus preventing displacement of the strip upwardly in the recess when handling the apparatus.