JP2006026785A - Driving machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a driving machine in which a nail is hardly plugged. <P>SOLUTION: The driving machine has a driver blade for hitting a nail; an injection port for guiding the driver blade; a magazine capable of feeding a connection nail to the injection port; and a feeding passage, i.e., a feeding passage for communicating the injection port and the magazine for abutting on a nail point of the connection nail when the driver blade hits the nail at a distal end of the connection nail. A V-shape groove along a feeding direction of the connection nail is provided on a part abutted on the nail point of the feeding passage. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a driving machine for driving a fastener such as a nail using compressed air or combustion gas, and particularly to a technique for preventing the fastener from being clogged inside the driving machine.

  A method of attaching a mounting member such as a finishing board such as a baseboard of a building interior or a surrounding edge is obtained by attaching a finishing nail having a small head diameter with a small nail head to the mounting member after the mounting member is bonded with an adhesive. It was common to drive by mounting in a narrow groove. Recently, in order to further improve the finish, a headless nail 8 having no nail head as shown in FIGS. 12 and 13 is often used. Because there is no nail head, the trace of driving is not noticeable and the finish is improved. A headless nail 8 having a shaft thickness of 0.6 to 0.7 mm is generally used. In addition, the nail foot is sharply formed to facilitate entry into the material to be driven. In manufacturing the headless nail 8, the nail heads are processed together after the plurality of nails are connected with an adhesive. For this reason, the nail foot is processed into a V shape. The V-shaped angle is generally about 60 °.

  A first example of a conventional driving machine will be described with reference to FIGS.

  As shown in FIG. 16, a magazine 2 that houses a connected headless nail 81 is provided at the lower portion of the driving machine main body 1. A feeding member 13 pressed by a spring (not shown) supplies the connected headless nail 81 to the fixed injection path 36. The fixed injection path 36 is formed in the plate 10 attached by screws 41 in front of the bit guide 12. The fixed injection path 36 has a front support surface 361 shown in FIGS. 16 and 17 and two side support surfaces 362 parallel to each other shown in FIGS. 14 and 15. The connection headless nail 8 is pressed against the front support surface 361 by the pressing force of a spring (not shown) of the magazine 2.

  The driving machine main body 1 has a contact arm 5 that can reciprocate up and down. The contact arm 5 is configured to be driven only when the tip of the contact arm 5 is in contact with the material to be driven. That is, the contact arm 5 acts as a safety device.

  When a trigger (not shown) is operated in a state where the contact arm 5 is in contact with the driven material, a piston (not shown) in the driving machine main body 1 moves downward and is a driver integrated with the piston (not shown). 18 hits the headless nail 8. At this time, the nail toes 8a of the second and subsequent nails are pressed against the flat foot support portion 122 formed on the bit guide 12, and a shearing force acts on the nail connection 81, so that only the headless nail 8 is Separated from the connected headless nails 8. The leading headless nail 8 is driven out from the injection port 31 and driven into the material to be driven.

  A second example of a conventional driving machine will be described with reference to FIGS.

  The nailer body 1 has a lock lever 30 in the vicinity of the trigger 3. The trigger 3 can be operated only when the lock lever 30 is operated first. That is, the lock lever 30 acts as a safety device.

JP 2002-283253 A

  The headless nail 8 is easy to bend because the thickness of the shaft is as thin as 0.6 mm to 0.9 mm. Conventionally, most of the shaft lengths are up to 25 mm, but long shaft lengths of 35 to 50 mm are often used. Since the amount of the adhesive of the connecting nail increases in proportion to the length of the nail, when the shaft length is long, it becomes difficult to disconnect the nail when driving, and the nail is likely to be clogged in the fixed injection path 36.

  The width b 'of the fixed injection path 36, that is, the distance b' between the opposing side support surfaces 362 is generally about 0.8 mm to 1 mm. Further, the height h ′ of the fixed injection path 36, that is, the distance h ′ between the front support surface 361 and the entire end of the foot receiving portion 122 is generally about 0.8 mm to 1 mm. On the other hand, the shaft thickness of the headless nail 8 is generally about 0.6 mm to 0.7 mm. Since a gap is generated between the fixed injection path 36 and the headless nail 8a, the nail foot of the second headless nail 8 is fixed when the driver blade 18 hits the headless nail 8a. There is a problem of getting stuck and clogging. In particular, when two nails remain at the end, or when the connection is broken in the middle, the shear force is borne by only about half of the nail foot of the second headless nail 8, This problem is likely to occur.

  Further, when a shearing force is applied to the connection headless nail 81, only the V-shaped apex of the nail foot 8a abuts on the foot receiving portion 122. For this reason, in particular, a load is locally applied to the portion that receives the second nail toe 8a and wears. As wear progresses, the portion that receives the second nail tip 8a becomes tapered as shown by the broken line in FIG. 17, and the second headless nail is more likely to enter the fixed injection path 36.

  An object of the present invention is to provide a driving machine in which nails are not easily jammed.

  A driver blade for striking a nail, an injection port for guiding the driver blade, a magazine capable of supplying a connecting nail to the injection port, and a feed path for communicating the injection port with the magazine, the driver blade In a driving machine having a feeding path that comes into contact with the nail foot of the connecting nail when hitting the nail at the tip of the connecting nail, a portion of the feeding path that comes into contact with the nail foot in the feeding direction of the connecting nail A V-shaped groove is provided along. Thereby, the surface pressure in the contact surface of a feed path and a connection nail can be made small, and wear of a feed path can be prevented. Therefore, it is possible to prevent nail clogging due to wear of the feed path.

  Furthermore, the width and height of the injection path are preferably set to be 0.8 mm or more and 1.0 mm or less. In this way, clogging of nails is less likely to occur.

  According to the configuration of the first aspect, the contact pressure between the feeding path and the connecting nail can be reduced, and wear of the feeding path can be prevented. Can prevent clogging. Therefore, it is possible to provide a driving machine in which nails are not easily clogged.

  According to the configuration of the second aspect, it is possible to provide a driving machine in which the nail is less likely to be clogged.

  Embodiments of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the driving machine main body 1 includes a piston 14 that reciprocates by compressed air and drives a headless nail 8 in an injection portion 26 and a driver 18 connected to the piston 14. 11. Projected downward from the lower end of the housing 11 to be ejected, the injection portion 26 into which the headless nail 8 is driven out, the handle 15 installed orthogonally to the housing 11, and disposed substantially parallel to the handle 15. It is composed of a magazine 2 and the like that store the connecting nails 81 and supply them one by one into the injection section 26.

  A switch 23 for controlling the driving operation of the nailing machine body 1 is provided near the base of the handle 15, and a trigger 3 that is pulled by a finger of a hand holding the handle 15 is provided near the switch 23. It has been. An upper end 52 of the contact arm 5 that can reciprocate is located in the vicinity of the trigger 3. The tip 51 of the contact arm 5 is provided with a moving ejection path 37 for guiding the headless nail 8 that has been struck, and has a structure capable of reciprocating vertically between the bottom dead center and the top dead center.

  The trigger 3 is pivotally supported by the housing 11 so as to be able to be rotated about a rotation shaft 22 as a fulcrum, and a plunger 4 that protrudes downward and is supported so as to be vertically slidable is located at the center of the switch 23. ing. When the plunger 4 is at the bottom dead center, the driving machine main body 1 is kept in the OFF state, and the switch 23 is turned on in the process of moving the plunger 4 from the bottom dead center to the top dead center, and the driving operation of the driving machine main body 1 is performed. It has a structure that starts.

  The trigger 3 is provided with a trigger arm 19 pivotally supported by a pivot 24 provided at one end of the trigger 3, and the free end 191 of the opposite trigger arm 19 is engaged with the contact arm upper end 52. The substantially central portion is provided at a position where it engages with the tip of the plunger 4.

  As shown in FIG. 7, the magazine 2 stores and supports the connecting nail 81 and the feeding member 13 that advances the connecting nail 81. The feeding member 13 is biased toward the bit guide 12 by a spring (not shown). The nail can be fed into the bit guide 12 together with the connecting nail 81. A bit guide 12 that is fixed to the driving machine main body 1 and extends downward is disposed at the tip of the magazine 2, and the bit guide 12 feeds the connecting nail 81 and the leading nail of the connecting nail 81. A part of the fixed injection path 36 for storing 8b is formed.

  As shown in FIGS. 4 to 8, the fixed injection path 36 includes at least a front support surface 361 that supports the front of the front nail 8b of the housed connecting nail 81 and at least a side of the front headless nail 8. The front support surface 361 is formed between the right side (back) surface of the plate 10 fixed to the front surface of the bit guide 12 with screws or the like, and the side support surface 362 is a bit. A front support surface 361 is formed on the front side of the guide 12 or on the right (back) side of the plate 10. The distance b between the pair of side support surfaces 362 constituting the fixed injection path 36 is formed to be 0.8 mm or more and 1.0 mm or less. From the experimental results, it is known that nail clogging hardly occurs within this range.

  The feed path 121 of the bit guide 12 is provided with a foot receiving portion 122 that guides and supports the nail foot 8a at the lower end of the connecting nail 81. The shape of the foot receiving portion 122 is an angle that matches the tip angle of the nail foot 8a. A substantially V-shaped groove 122a is formed. The distance h between the front support surface 361 that forms the fixed injection path 36 and the front end (left end in FIG. 8) of the foot support portion 122 is formed to be 0.8 mm or more and 1.0 mm or less. From the experimental results, it is known that nail clogging hardly occurs within this range. Furthermore, in the present invention, the V groove 122a has an angle of 40 ° or more and 80 ° or less. Thereby, a contact area with the nail foot 8a formed at about 60 degrees increases significantly.

  Further, in the present invention, the lower end 10 a of the front support surface 361 of the plate 10 constituting the fixed injection path 36 is placed substantially at the same position as the foot support part 122 or below the position of the foot support part 122. Is formed.

  As shown in FIG. 9, the contact arm 5 has a tip 51 located below the bit guide 12, supported by the bit guide 12 so as to be slidable up and down, and an upper end 52 extending up to the vicinity of the trigger. It can be connected to or engaged with the tip 51 and can be slid vertically. The contact arm 5 is always pressed to the top dead center by a spring 6 provided between the bit guide 12 and the load of the spring 6 is pressed downward by the pressure applied to the spring 61 of the plunger 4 and the plunger 4. The load is set smaller than the load.

  The contact arm tip 51 is provided with a moving injection path 37 at a position continuous with the fixed injection path 36 provided in the bit guide 12, and the lower end of the moving injection path 37 is an injection port 31. Further, the moving ejection path 37 has a front guide surface 371 for guiding the front of the headless nail 8 to be driven, at least a pair of side guide surfaces 372 for guiding the side of the headless nail 8, and a rear of the headless nail 8. The rear guide surface 373 for guiding is provided, and the upper end of the front guide surface 371 is formed at a position above the upper end of the rear guide surface 373. In the present embodiment, since the injection path 7 is separated into the fixed injection path 36 and the moving injection path 37, a gap is formed between the fixed injection path 36 and the moving injection path 37.

  The driving operation will be described with reference to FIG.

  The driver 18 is provided so as to be movable up and down in the fixed injection path 36 and the moving injection path 37. When the switch 23 is turned on, the drive bar 18 is rapidly lowered, and the leading nail 8b in the fixed injection path 36 is connected to the connecting nail 81. And is driven into the driven material 9 from the injection port 31.

  The injection port 31 of the tip 51 of the contact arm 5 is lightly applied to the surface of the groove 91 of the workpiece 9. Next, the trigger 3 is pulled to activate the nailer body 1. By pulling the trigger 3, the trigger 3 is rotated to the switch 23 side. As a result, the pivot portion 24 of the trigger arm 19 moves upward, so that the central portion 192 of the trigger arm 19 abuts against the tip of the plunger 4 of the switch 23. As a result, the distal end portion of the plunger 4 serves as a fulcrum, and the pivot portion 24 serves as a power point, and the free end 191 of the trigger arm 19 pushes down the contact arm upper end 51. However, since the contact arm tip 51 is in contact with the workpiece 9, the contact arm 5 is not pushed down and the tip 51 is prevented from descending. Since the contact arm 5 does not move downward due to this lowering prevention, the plunger 4 is pushed up by the substantially central portion of the trigger arm 19 in accordance with the pulling operation of the trigger 3, the switch 23 is turned on and the driving machine body 1 starts operating. To do. The driver 18 rapidly descends, and the leading nail 8b of the connecting nail 81 in the fixed injection path 36 is hit by the tip of the driver 18, and the adhesive of the connecting nail 81 is sheared, so that only the leading nail 8b is separated.

  As described above, the shape of the foot receiving portion 122 is formed in the V groove 122a in accordance with the tip angle of the nail foot 8a. For this reason, since the contact area of the tip of the nail foot 8a is greatly increased compared to the conventional case, the tip of the nail foot 8a is not crushed and the tip of the nail foot 8a is not sheared, and the nail is fixed without being disconnected. Generation | occurrence | production of the nail | clogging which enters two in the injection path 36 can be prevented.

  Further, as described above, since the adhesive is not cut by receiving a load at one point of the nail foot 8a and can be received by the entire tip of the nail foot 8a, the contact area is increased, and the nail receiving portion is increased. Only the middle of 122 will not wear prematurely.

  When the leading nail 8 b is separated from the connecting nail 81, the leading nail 8 b is guided and supported by the moving injection path 37, driven out from the injection port 31, and driven into the driven material 9.

  Since the switch 23 is turned on with the injection port 31 positioned at the lower end of the moving injection path 37 always in contact with the workpiece 9, the headless nail 8 is bent and driven. There is no problem that the tip of the driver 18 comes off from the head nail 8 and the driving of the headless nail 8 is incomplete.

  Further, even if the driving machine main body 1 is lifted by a reaction during driving, the moving injection path 37 is not fixed to the driving machine main body 1, and thus the injection port 31 and the driven material 9 are kept in contact with each other. I can do it. Accordingly, there is no problem that the headless nail 8 is bent or the tip of the driver 18 is detached from the headless nail 8 and the driving of the headless nail 8 is incomplete.

  The above has described the trigger three-pull operation in a state where the contact arm tip 51, which is a normal driving operation of the headless nail 8, is pressed against the mounting member 9. The operation when there is no driving material 9 will be described.

  First, when the trigger 3 is pulled, the pivot portion 24 of the trigger arm 19 moves as described above, so that the central portion 192 of the trigger arm 19 comes into contact with the distal end portion of the plunger 4. The plunger 4 is always pressed downward by a load due to the spring 61 and pressure, and this load is set larger than the load of the spring 6 pushing the contact arm 5 to the top dead center. The free end 191 of the trigger arm 19 overcomes the load of the spring 6 and pushes down the contact arm 5 with the pivot 24 serving as a fulcrum, and the contact arm 5 is bottom dead from the top dead center. It moves against the spring 6 to the point position. As a result, the plunger 4 does not move and remains at the bottom dead center, the switch 23 is not turned on, and the driving operation is not performed.

  An example in which the foot receiving part 122 has another shape will be described with reference to FIGS. 10 and 11.

  FIG. 10 shows an example in which a part of the foot receiving portion 122 is formed in a substantially V-shaped groove 122a shape and the periphery is made flat as in the conventional case. FIG. 11 shows an example in which a part or the whole of the foot support part 122 is substantially circular or elliptical and the periphery is eccentric. Both have the same effects as the above embodiment.

  As shown in FIG. 17, the injection unit 26 is not provided with a safety device such as the contact arm 5, and for this reason, the entire fixed injection path 36 is formed only by the plate 10 and the bit guide 12. However, it is feasible to make the foot support portion 122 described in the present invention substantially V-shaped groove 122a, so that the wear of the foot support portion 122 can be prevented and the occurrence of clogging with nails can also be prevented.

  Further, in the driving machine in which the entire fixed injection path is configured by only the plate and the bit guide as shown in FIG. By adopting the shape according to 8a, it is possible to prevent clogging of nails as in the above-described embodiment.

  Further, the present invention is not limited to the headless nail as long as it is a driving machine that uses a V-shaped plate-like connecting nail and cuts the connecting adhesive with the second and subsequent nail feet. In the same manner as above, clogging of nails can be prevented.

Cross-sectional view of the overall structure of a driving machine according to an embodiment of the present invention The main part rear view of FIG. Left side view of the main part of FIG. AA sectional view of FIG. Partial enlarged view of part A in FIG. The partial enlarged view which shows the state which loaded the headless connection nail in FIG. 1 is a cross-sectional view of the main part structure showing a state in which a headless connecting nail is loaded in FIG. Partial enlarged view of part B in FIG. FIG. 1 is a cross-sectional view of the main part structure showing a state where a nail is driven in FIG. Partial enlarged view showing the second embodiment of FIG. Partial enlarged view showing the third embodiment of FIG. Perspective view of headless nail Perspective view of connecting nail Cross-sectional view of the main part structure showing a first example of a conventional driving machine FIG. 14 is an enlarged view of part C showing a state in which a headless connecting nail is loaded. Cross-sectional view of the main part structure showing a first example of a conventional driving machine FIG. 16 is an enlarged view of part D showing a state where the headless nail is clogged. Whole structure sectional view showing a second example of a conventional driving machine The left view which shows the principal part of FIG.

Explanation of symbols

  1 is a driving machine body, 2 is a magazine, 3 is a trigger, 8 is a nail, 8a is a nail foot, 81 is a connecting nail, 7 is an injection path, 361 is a front support surface, 362 is a side support surface, and 121 is a feed A feed path, 122 is a foot receiving portion, 122a is a V groove, 13 is a feeding member, 18 is a driver, 23 is a switch, and 30 is an injection port.

Claims (2)

A driver blade that strikes the nail;
An injection port for guiding the driver blade;
A magazine capable of supplying a connecting nail to the injection port;
A feed path for communicating the injection port and the magazine, wherein the driver blade hits a nail at the tip of the connection nail, and a supply path that contacts the nail foot of the connection nail;
In a driving machine having
A driving machine characterized in that a V-shaped groove along the feeding direction of the connecting nail is provided in a portion of the feeding path that comes into contact with the nail foot.   2. The driving machine according to claim 1, wherein a width and a height of the injection path are 0.8 mm or more and 1.0 mm or less.