JP2006000988A - Headless nail driving machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To ensure driving operation in the contact state of an ejection port and a driven material and to ensure positive driving of a headless nail and finish after driving. <P>SOLUTION: This headless nail driving machine has: a switch for controlling the driving operation of a driving machine body according to the operation of a trigger; a magazine for enclosing a large number of connected headless nails and a feeding member for advancing the connected headless nails; an ejection passage with a groove width which encloses the leading headless nail, being almost equal in dimension to the shank thickness of the headless nail; a feed passage located between the magazine and the ejection passage to guide the connected headless nails to the ejection passage; and a drive bit moving up and down in the ejection passage and separating the leading headless nail in the ejection passage from the connected headless nails to drive it from an ejection port at the lower end of the ejection passage. The ejection passage is composed of a fixed ejection passage fixed to a driving machine body, and a moving ejection passage vertically movable in the driving direction of the headless nails. The moving ejection passage and the trigger are functionally interlocked to allow driving operation in the state of the lower end of the moving ejection passage being brought into contact with the driven material. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a headless nail driving machine for driving a headless nail without a nail head. Various power sources such as electricity, compressed air, or gas can be used as the power source of the driving machine of the present invention. Hereinafter, the driving power source will be described as a compressed air 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. Although it was common to drive by mounting in a narrow groove, recently, in order to further emphasize the finish after driving, there has been an increase in methods of driving using a headless nail 8 as shown in FIG. Yes. If this construction method is used, the nail after hitting the nail 8 is not conspicuous and the finish is improved. In general, the thickness of the shaft of the headless nail 8 is mainly 0.6 to 0.7 mm.

FIG. 7 shows an example of a conventional headless nail driver.
As the nail, a connected headless nail 81 in which a plurality of shafts are bonded with an adhesive or the like is used.
Next, the structure and operation of the headless nail driver shown in FIG. 7 will be described.
The magazine 2 is attached to the lower part of the driving machine main body 1, and the connected headless nail 81 loaded in the magazine 2 is sent into the front injection path 7 by the feeding member 13. By operating the trigger 3, the piston 14 in the driving machine body 1 is operated, and the leading end of the connected headless nail 81 supplied into the injection path 7 by the drive bit 18 integrated with the piston 14. The headless nail 8 is driven out from the injection port 31 and driven into the material to be driven.
Further, the nailing machine body 1 has a lock lever 30, and the trigger 3 can be operated only when the lock lever 30 is operated.

  As described above, since the conventional headless nail driving machine has the lock lever 30, the operation of the driving machine main body 1 does not operate only by the operation of the trigger 3, and the malfunction preventing structure is obtained. However, it is not a structure that can ensure the driving operation only when the injection port 31 is in contact with the workpiece.

  On the other hand, the headless nail 8 emphasizes the finish at the time of driving, so the shaft thickness is very thin, 0.6 to 0.7 mm, so it is easy to bend, and the tip of the drive bit 18 into which the headless nail 8 is driven Is also getting thinner.

  Therefore, the conventional headless nail driving machine may perform the driving operation without bringing the injection port 31 into contact with the driven material. In this case, the distance between the injection port 31 and the driven material is a distance. In this portion, the headless nail 8 is bent, or the tip of the drive bit 18 is detached from the headless nail 8 so that the driving of the headless nail 8 is incomplete. was there.

  Further, in the driving machine, the driving machine body 1 may be lifted by the reaction of the piston 14 and the drive bit 18 during driving operation. In the conventional headless nail driving machine, the driving machine body 1 Since the injection path 7 has a fixed structure, even when the injection port 31 and the driven material are in contact at the start of the driving operation, a distance is generated between the injection port 31 and the driven material due to the reaction, In this portion, the headless nail 8 may be bent, or the tip of the drive bit 18 may be detached from the headless nail 8, which may cause incomplete driving of the headless nail 8. .

  The object of the present invention is to eliminate the disadvantages of the conventional headless nail driving machine described above, to ensure the driving operation in a state where the injection port and the driven material are securely in contact with each other, to prevent malfunction and to secure the headless nail. It is to secure the finish and the finish after driving.

  The purpose is to form the injection path at least by a fixed injection path fixed to the driving machine body and a movable injection path that can move up and down in the headless nail launching direction. This is achieved by interlocking and enabling a driving operation in a state where the lower end of the moving injection path is in contact with the driven material.

  According to the first aspect of the present invention, since the switch is turned on with the injection port always in contact with the workpiece, and the moving injection path is not fixed to the driving machine body, It can keep the driven material in contact with the headless nail, and it can prevent the headless nail from being bent and the tip of the drive bit coming off from the headless nail. I can do it.

  According to the second aspect of the invention, since the headless nail is supported by the side support surfaces of the fixed injection path and the moving injection path, it is possible to prevent the headless nail from being bent and driven.

  According to the third aspect of the present invention, the lower end position of the front support surface constituting the fixed injection path is placed at the same position as the position of the foot receiving portion that guides and supports the lower end of the connection headless nail, or Since the gap between the lower end of the front support surface and the front surface of the footrest is set to a size that does not allow two headless nails to enter, two or more headless nails are separated and clogged at once. Can be prevented.

  According to the fourth aspect of the present invention, the upper end of the front guide surface is positioned above the upper end of the rear guide surface, so that even if the clogging phenomenon of the headless nail occurs, the front is high. The guide surface receives the tip of the drive bit, and the tip of the drive bit can be prevented from being damaged.

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS.
FIG. 1 shows an overall view of the driving machine main body 1, and FIG. 2 shows a side view on the opposite side of FIG. The driving machine main body 1 is reciprocated by compressed air, and a housing 11 incorporating a piston 14 for driving a headless nail 8 in an injection portion 26 and a drive bit 18 connected to the piston 14, An injection part 26 that protrudes downward from the lower end and is driven out by the headless nail 8, a handle 15 that is mounted orthogonally to the housing 11, and is arranged substantially parallel to the handle 15, The magazine 2 is stored and supplied one by one into the injection unit 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.

3 is a cross-sectional view taken along the line AA of FIG. 1, and FIG. 4 is a cross-sectional view of a main part of FIG.
The connected headless nails 81 are connected by a plurality of headless nails 8 having a shaft thickness of 0.6 to 0.7 mm and without a head, and the magazine 2 is connected to the headless nails 81 and the headless nails. The feeding member 13 for advancing 81 is housed and supported, and the feeding member 13 is urged toward the bit guide 12 by a spring (not shown). A bit guide 12 fixed to the driving machine body 1 and extending downward is disposed at the front end of the magazine 2, and the bit guide 12 is connected to a feeding path 121 that guides the connected headless nail 81 and the connected headless nail. It has a part of the fixed injection path 36 for accommodating the 81 headless nails 8.

  The fixed ejection path 36 includes a front support surface 361 that supports the front of the headless nail 8 at the front of the stored connected headless nail 81 and at least a pair of side supports that support the side of the headless nail 8 at the front. The side support surface 362 is formed in front of the bit guide 12, and the front support surface 361 is formed by the left (rear) end surface of the plate 10 fixed to the front surface of the bit guide 12 with screws or the like. . The distance between the pair of side support surfaces 362 constituting the fixed injection path 36 is 0.8 to 1.0 mm, and the headless nail 8 having a shaft thickness of 0.6 to 0.7 mm can be stored. The size is set to be as small as possible with the headless nail 8.

  As described above, the headless nail 8 has a very thin shaft thickness of 0.6 to 0.7 mm, so it is easy to bend. When driving, the headless nail 8 is struck by the drive bit 18 to connect the headless nail. When separated from the nail 81, the hit headless nail 8 may buckle in the fixed injection path 36, and the side surface of the headless nail 8 is supported by a pair of side support surfaces 362 to prevent buckling. It is necessary to reduce the backlash between the headless nail 8 and the side support surface 362 as much as possible, and further, as a dimension capable of storing the headless nail 8, the distance between the pair of side support surfaces 362 is determined based on experimental values. Is set to 0.8 to 1.0 mm.

  The feed path 121 is provided with a foot support 122 that guides and supports the lower end of the connection headless nail 81, and the lower end of the front support surface 361 constituting the fixed injection path 36 is placed at the same position as the foot support 122. Alternatively, it is formed so as to be positioned below the position of the foot support portion 122.

  By the way, when driving the headless nail 8 with the drive bit 18 at the time of driving and separating from the connected headless nail 81, the nail foot of the connected headless nail 81 is supported by the foot support part 122, and the headless nail at the head It is normal to separate only one of the eight, but the headless nail 8 is particularly thin and easy to bend with a shaft thickness of 0.6 to 0.7 mm. When the position is higher than the position of the portion 122, the distance between the front end of the foot support portion 122 and the lower end of the front support surface 361 becomes wide, and two or more headless nails 8 enter this portion. There arises a problem that the headless nail 8 is clogged.

  Further, the contact arm 5 has a tip 51 located below the bit guide 12, is supported by the bit guide 12 so as to be vertically slidable, and has an upper end 52 extending up to the vicinity of the trigger at the top. 51 can be coupled or engaged with 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.

  Incidentally, since the driving machine body 1 of the present invention has a structure in which the injection path 7 is separated into the fixed injection path 36 and the moving injection path 37, a gap may be formed between the fixed injection path 36 and the moving injection path 37. . In particular, the headless nail 8 is very thin and easy to bend. Therefore, when the tip of the drive bit 18 is worn, the tip of the drive bit 18 is detached from the upper end of the headless nail 8 being driven, and the fixed injection path 36 and the moving injection There may be a phenomenon in which the upper portion of the headless nail 8 is bent and clogged by a gap between the paths 37. In that case, the tip of the drive bit 18 may bend in the opposite direction to the capped head nail 8 and be damaged.

  Since the driving machine body 1 of the present invention has a configuration in which the upper end of the front guide surface 371 is located above the upper end of the rear guide surface 373, even if the clogging phenomenon of the headless nail 8 described above occurs. Further, the front end of the drive bit 18 is received by the front guide surface 371 that is raised, and the front end of the drive bit 18 can be prevented from being damaged. It has been confirmed by experiments that the headless nail 8 is bent toward the rear guide surface 373 in the clogging phenomenon of the headless nail 8 described above.

  The front guide surface 371 is formed by the left (rear) end surface of the guide plate 25 fixed to the contact arm 5 with screws. Further, the distance between the pair of side support surfaces 372 constituting the moving injection path 37 is 0.8 to 1.0 mm, and the headless nail 8 having a shaft thickness of 0.6 to 0.7 mm is formed. It is storable and is set to a size with as little headless nail 8 and as little play as possible.

  Since the headless nail 8 has a very thin shaft thickness of 0.6 to 0.7 mm, the headless nail 8 is easy to bend, and may be buckled in the moving ejection path 37 due to resistance at the time of driving. It is necessary to support the side surfaces of the headless nail 8 with a pair of side support surfaces 372 to prevent buckling, and the backlash between the headless nail 8 and the side support surface 372 is reduced as much as possible. From the experimental values, the distance between the pair of side support surfaces 372 is set to 0.8 to 1.0 mm.

  FIG. 5 is a cross-sectional side view showing a driving operation state of the headless nail driving machine of the present invention.

The drive bit 18 is provided so as to be movable up and down in the fixed injection path 36 and the moving injection path 37, and the drive bit 18 is rapidly lowered by the ON operation of the switch 23, and the leading headless nail 8 in the fixed injection path 36 is provided. Is separated from the connection headless nail 81 and driven into the driven material 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 comes into contact with the tip of the plunger 4 of the switch 23. As a result, the tip of the plunger 4 serves as a fulcrum, and the pivot 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 the 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.

  Accordingly, the drive bit 18 is rapidly lowered, the headless nail 8 in the fixed injection path 36 is separated from the connected headless nail 81, guided and supported by the moving injection path 37 in the contact arm tip 51, and the injection port 31. Is driven into the workpiece 9.

In the driving machine according to the present invention, as described above, the switch 23 is turned on while the injection port 31 positioned at the lower end of the moving injection path 36 is always in contact with the workpiece 9. The headless nail 8 was bent and driven, or the tip of the drive bit 18 was detached from the headless nail 8 and the headless nail 8 was incompletely driven. Can be prevented.
Furthermore, even if the driving machine main body 1 is lifted due to the reaction at the time of driving, the moving injection path 37 is not fixed to the driving machine main body 1, so that the injection port 31 and the driven material 9 are in contact with each other. The headless nail 8 can be bent or the tip of the drive bit 18 can be detached from the headless nail 8, thereby preventing the incomplete driving of the headless nail 8.

  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.

The partial cross section side view which shows one Embodiment of this invention headless nail driver. The rear view of the principal part of FIG. AA sectional view taken on the line AA of FIG. The partial cross section side view which shows the principal part of FIG. Sectional side view which shows the driving | running state of this invention headless nail driving machine. The perspective view which shows an example of a headless nail. The side view which shows an example of the conventional headless nail driving machine.

Explanation of symbols

1 is a driving machine body, 2 is a magazine, 3 is a trigger, 8 is a headless nail, 81 is a connected headless nail, 7 is an injection path, 36 is a fixed injection path, 361 is a front support surface, 362 is a side support surface,
37 is a moving injection path, 371 is a front guide surface, 372 is a side guide surface, 373 is a rear guide surface, 121 is a feed path, 122 is a foot receiving portion, 13 is a feed member, 18 is a drive bit, and 23 is a switch. , 30 is an injection port, and 9 is a material to be driven.

Claims (4)

The main body of the driving machine with built-in driving means such as a drive bit, a switch for controlling the driving operation of the driving machine in accordance with the operation of the trigger, and a lower position of the main body of the driving machine. The magazine that stores and supports the connected headless nails and the feeding member that advances the connected headless nails, and the width of the groove that stores the headless nails at the head of the connected headless nails are approximately the same as the thickness of the shaft of the headless nails. An injection path and a feeding path that is located between the magazine and the injection path, guides the connected headless nail and guides the headless nail into the injection path, and moves the drive bit up and down in the injection path. A headless nail driving machine that separates the headless nail in the injection path from the connection headless nail and is driven out from the injection port at the lower end of the injection path and driven into the driven material,
The injection path is composed of at least a fixed injection path fixed to the driving machine main body and a moving injection path movable up and down in the direction of launching the headless nail, and the movement injection path and the trigger are functionally linked, A headless nail driving machine characterized in that driving operation is possible in a state in which the lower end of the moving injection path is in contact with the driven material. The feed path is provided with a foot receiving portion that guides and supports the lower end of the connected headless nail, and the fixed injection path has a front support surface that supports the front and sides of the headless nail and at least a pair of side supports. And a front guide surface for guiding the front, side and rear of the headless nail to be driven, and at least a pair of side guide surfaces and a rear guide surface. For a shaft thickness of 0.6 to 0.7 mm, the distance between the pair of side support surfaces of the fixed injection path is 0.8 to 1.0 mm, and a pair of side plans of the moving injection path 2. The headless nail driver according to claim 1, wherein the distance between the inner surfaces is 0.8 to 1.0 mm. The feed path is provided with a foot support portion that guides and supports the lower end of the connected headless nail, and a front support surface and at least a pair of side support surfaces that support the front and sides of the headless nail are provided on the fixed injection path. Furthermore, the moving injection path is provided with a front guide surface that guides the front, side, and rear of the headless nail that is launched, and at least a pair of side guide surfaces and a rear guide surface, thereby forming a fixed injection path. The lower end of the support surface is placed at the same position as or lower than the position of the foot rest, and the upper end of the front guide surface constituting the moving injection path is formed above the upper end of the rear guide surface. The headless nail driver according to claim 1, wherein The lower end of the front support surface that constitutes the fixed injection path is formed at the same position as or lower than the position of the foot rest, and the upper end of the front guide surface that constitutes the movement injection path is formed at the rear guide surface. 3. The headless nail driver according to claim 2, wherein the headless nail driver is formed at a position above the upper end.

Images