JP2008161908A - Drift pin driving tip structure, and driving machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the tip structure of a drift pin driving machine where the physical burden on a drift pin driving operator is reduced, and further, a drift pin (D) can be stably and correctly driven, and to provide a driving machine which copes with shifts in the upper/lower direction and the right/left directions caused by the impulse of a blow, and can deeply drive a drift pin as well. <P>SOLUTION: The tip structure of a drift pin driving machine is equipped with: a snap (20) driving a drift pin; and a guide (30) engaged to the snap (20) so as to be dislocated in the cross directions, holding the drift pin. The whole length dimensions (L) of the guide (30) and the whole length dimensions (l) of the head part (21) of the snap (20) are almost made the same, and the projecting positions of the front edge face (21a) of the snap (20) and the front edge face (31a) of the guide (30) to the front direction are almost the same. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a driving machine for driving a drift pin used in a building.

For example, in wooden construction, as shown in FIGS. 13 and 14, wood (M) such as columns and beams may be joined together using metal fittings (P) and drift pins (D). Such a drift pin (D) is a taper-shaped rod body, and the driving thereof is performed by a hammer (a hammer) held in the hand of the driving operator.
JP 2006-16807 A

  However, driving the drift pin (D) into the hole (H) formed in the wood (M) or the like imposes a large physical burden on the driving operator. For example, depending on the scale of the building, 2000 drift pins (D) may be driven per building, which is a very heavy burden for the driving operator.

  Moreover, in order to accurately drive the drift pin (D) into the hole (H) of the wood (M), it is necessary to collide a hammer (metal hammer) accurately from the direction along the central axis of the drift pin (D). There is also the problem that skill is required.

  By the way, although patent document 1 is disclosing the technique corresponding to the said subject on the assumption that drift pin (D) itself is made into a pipe shape, generally this pipe-shaped drift pin (D) has spread widely. However, the above problem has not been solved.

  In order to solve the above problems, the present invention provides a snap (20) that strikes the drift pin, a guide (30) that is fitted to the snap (20) so as to be displaceable in the front-rear direction and holds the drift pin. The front end face (21a) of the snap (20) and the front end face (31a) of the guide (30) project substantially in the same direction at the position where the rearward displacement of the guide (30) stops. It is the tip structure of the drift pin driving machine characterized by becoming.

  The present invention also includes a snap (20) that strikes the drift pin, and a guide (30) that is fitted to the snap (20) so as to be displaceable in the front-rear direction and that holds the drift pin. 30) is displaced rearward and the rear end surface (32b) of the guide (30) is in contact with the flange (22) of the snap (20), and the front end surface (21a) of the snap (20) and the guide (30) ) Is a tip structure of a drift pin driving machine characterized in that the front end surface (31a) protrudes in the forward direction substantially the same.

  The present invention also includes a snap (20) that strikes the drift pin, and a guide (30) that is fitted to the snap (20) so as to be displaceable in the front-rear direction and that holds the drift pin. 30) and the front end surface (21a) of the snap (20) and the front end surface (21) of the guide (30) are made substantially the same. 31a) is a tip structure of a drift pin driving machine characterized in that the forward projecting positions of 31a) are substantially the same.

  Further, the present invention is a drift pin driving machine having each of the tip structures described above.

  According to the present invention, at the beginning of the driving operation, the drift pin (D) is driven in a state where the drift pin (D) is held on the inner diameter surface of the guide (30), so that the drift pin (D) can be driven stably and accurately ( (See FIG. 4).

  At the end of the driving operation, as the drift pin (D) is driven into the wood (M), the guide (30) is gradually displaced backward in the snap (20), and the drift pin (D) When the portion inserted into the guide (30) is almost gone, the guide pin (30) is moved back and forth in conjunction with the impact of the snap (20) to move the guide pin (30) to the drift pin (D). Will be disengaged (see FIG. 5A). Then, unlike the state in which the drift pin (D) is held by the guide (30), there arises a problem that the driving machine itself is shaken relatively vertically and horizontally by the impact of the impact.

  In the present invention, in order to solve such a problem, the front end surface (21a) of the snap (20) and the front end surface (31a) of the guide (30) in the forward direction at a position where the backward displacement of the guide (30) stops. Since the projecting position is substantially the same, the striking surface is formed by both the front end surface (31a) of the guide (30) and the front end surface (21a) of the snap (20), and the front end surface of the snap (20) ( Since the rear end of the drift pin (D) can be hit with a hitting surface wider than the hitting surface consisting only of 21a), the drift pin (D) It can be driven in (see FIG. 5B). In other words, even if the rear end surface of the drift pin (D) and the front end surface (21a) of the snap (20) are not exactly opposed to each other, the guide spreads around the front end surface (21a) of the snap (20). Since it faces the front end surface (31a) of (30), the drift pin (D) can be driven deeper into the wood (M) by the front end surface (31a).

  Further, the front end surface (21a) of the snap (20) in a state where the guide (30) is displaced rearward and the rear end surface (32b) of the guide (30) is in contact with the flange (22) of the snap (20). And the front end surface (31a) of the guide (30) are configured to have substantially the same protruding position in the forward direction, or the overall length (L) of the guide (30) and the total length of the tip (21) of the snap (20). Driving a drift pin having a configuration in which the dimension (l) is substantially the same, and the front end face (21a) of the snap (20) and the front end face (31a) of the guide (30) are substantially the same in the forward protruding position. It can also be a machine tip structure.

  According to the present invention, the physical burden on the driving operator can be reduced, and since the drift pin (D) is initially held by the inner diameter surface of the guide (30), the drift pin can be stably and accurately driven. (D) can be driven in. At the stage where the drift pin (D) is driven, the front end surface (31a) of the guide (30) and the front end surface (21a) of the snap (20) form an integral striking surface. It is possible to deal with blurring in the vertical and horizontal directions due to impact and to drive the drift pin (D) deeper.

  The best mode for carrying out the present invention will be described below with reference to the drawings (FIGS. 1 to 12) shown as examples.

(Example 1)
1 to 6 show a first embodiment of a driving machine for a drift pin D according to the present invention.

  As shown in FIG. 3, the air hammer 10 has an air cylinder chamber 11, is accommodated in the air cylinder chamber 11 so as to be movable in the front-rear direction, and strikes the snap 20 in the advanced state, and a compressed air supply source The air supply means 13 etc. which drive the piston 12 alternately in the front-back direction are sent by sending the compressed air sent from to the air cylinder chamber 11.

  A snap 20 is inserted into the snap insertion hole 14 formed at the distal end of the air hammer 10, and a cylindrical guide 30 is fitted on the distal end portion 21 of the snap 20. It is fitted so that it can be displaced within a predetermined range.

  Specifically, a cylindrical hole 32a is drilled in the rear end portion 32 of the guide 30, and a ball 40 for retaining is inserted into the hole 32a, and the ball groove 21b in which the ball 40 slides within a predetermined range. Is engraved in the tip portion 21 of the snap 20, and the outer opening of the hole 32a formed in the guide 30 is closed by a ring-shaped ring 50, so that the guide 30 is fitted to the snap 20 so that it can be displaced in a predetermined range in the front-rear direction. is doing. A spring 60 that urges the guide 30 forward is fitted on the rear end portion 32 of the guide 30, and the tip of the spring 60 abuts on a ring 50 that is fitted on the rear end portion 32 of the guide 30. The rear end of the spring 60 is in contact with the step portion 22 b of the front flange portion 22 of the snap 20.

  As described above, when the guide 30 is fitted to the snap 20 so as to be displaceable in a predetermined range in the front-rear direction, the guide 30 is displaced in the rearward direction of the snap 20 against the biasing force of the spring 60. In the state where the rear end surface 32b of the 30 is in contact with the front end surface 22a of the front flange portion 22 of the snap 20, the front projecting positions of both the front end surface 31a of the guide 30 and the front end surface 21a of the snap 20 are substantially the same. The overall length L of the guide 30 and the overall length l of the tip portion 21 of the snap 20 are set to be substantially the same so as to be substantially flush with each other. In other words, in front of both the front end surface 31a of the guide 30 and the front end surface 21a of the snap 20 at a position where the backward displacement of the guide 30 stops (a position where the guide 30 is displaced to the maximum within a predetermined displaceable range). The protruding positions in the direction are set to be substantially the same. In this embodiment, the displaceable range is from a position where the ball 40 is engaged with the front end of the ball groove 21b to a position where the rear end surface 32b of the guide 30 contacts the front end surface 22a of the front flange portion 22 of the snap 20. is there.

The snap 20 is inserted into the snap insertion hole 14 of the air hammer 10 and is attached to the air hammer 10 in a retaining state by a retaining member 15 fixed to the distal end side of the air hammer 10. The tip of the retaining member 15 is formed in a ring shape, and the ring shape (diameter) is slightly smaller than the size (diameter) of the rear collar portion 23 of the snap 20.
(Usage mode of this example)
First, the user inserts the tip portion of the tapered taper drift pin D into the hole H of the wood M, inserts the rear end of the drift pin D into the front end space S of the guide 30, and the rear end surface of the drift pin D And the front end surface 21a of the snap 20 are brought into contact with each other and the driving machine is pressed in the direction of the wood M.

  Next, the air hammer 10 is driven to send compressed air to the rear side of the piston 12, thereby causing the piston 12 to collide with the rear end surface 24 a of the snap 20. The drift pin D is pushed into the hole H by the impact generated at that time, the piston 12 is moved backward at the next moment, the piston 12 is advanced again, and the piston 12 is made to collide with the rear end surface 24a of the snap 20 again and pushed. Repeat. At this time, a force that swings in the vertical and horizontal directions due to the impact of the impact of the piston 12 acts, but since the drift pin D is held by the guide 30, the driving operation can be continued stably.

  Thus, since the drift pin D is driven with the inner diameter surface of the guide 30 held at the beginning of the driving operation, the drift pin D can be driven stably and accurately.

  At the end of the driving operation, most of the drift pin D is driven into the wood M, and the portion of the drift pin D that is inserted into the guide 30 (in the space S) is almost gone. As a result, the rear end of the drift pin D is detached from the guide 30 as shown in FIG. Then, unlike the state in which the drift pin D is held by the guide 30, a large force is exerted on the driving machine itself in the vertical and horizontal directions due to the impact of the impact, and the rear end surface of the drift pin D on the front end surface 21 a of the snap 20. However, according to the present embodiment, the striking surface is formed by both the front end surface 31a of the guide 30 and the front end surface 21a of the snap 20, and the striking surface wider than the striking surface consisting of only the front end surface 21a of the snap 20 is formed. Since the rear end of the drift pin D is hit by the surface, the drift pin D can be hit relatively easily even if the driving machine itself is swung vertically and horizontally by the impact of the hit. That is, since the overall length L of the guide 30 and the overall length 1 of the tip portion 21 of the snap 20 are set to be substantially the same, the protruding position in the forward direction of the front end surface 31a of the guide 30 and the front end surface 21a of the snap 20 is determined. Since the front end surface 21a of the snap 20 and the front end surface 31a of the guide 30 form an integral striking surface (a striking surface having a total area of 21a and 31a) that is substantially the same, FIG. As described above, the drift pin D can be driven deeply even when it swings up, down, left and right. In other words, when the rear end surface 32b of the guide 30 is in contact with the front end surface 22a of the front flange portion 22 of the snap 20, the rear end surface of the drift pin D and the front end surface 21a of the snap 20 are not accurately opposed to each other. Even so, since it faces the front end surface 31a of the guide 30 spreading around the front end surface 21a of the snap 20, the drift pin D can be driven deeper into the wood M by the front end surface 31a portion.

  Further, in a state where the rear end surface 32b of the guide 30 is in contact with the front end surface 22a of the front flange portion 22 of the snap 20, the snap 20 and the guide 30 move integrally in response to an impact caused by striking the piston 12. Since the front end face 21a of the snap 20 and the front end face 31a of the guide 30 are hit with the continuous hitting face (the hitting face having the total area of 21a and 31a), the surface of the wood (M) is hit. There is also an advantage that the surface is hardly damaged.

  Note that the tip structure of this embodiment is separable from the driving machine main body (air hammer) and is easy to maintain.

  In addition, if it mentions the detailed part of a present Example, the snap 20 is a substantially elongate column-shaped rod, the front-end | tip part 21, the front collar part 22 which protruded to the circumference | surroundings, the front collar part 22, and the rear collar part An intermediate portion located between the rear flange portion 23 and a rear end portion 24 extending from the rear flange portion 23 to the end. Ball grooves 21b are formed in three places on the peripheral surface of the tip portion 21, and the ball grooves 21b have a ship bottom shape in which the depths of the front end and the rear end are reduced. The front collar portion 22 includes a front end surface 22a that abuts on the rear end 32b of the guide 30 and a step portion 22b that a rear end of the spring 60 abuts on. The diameter of the step portion 22 b is substantially equal to the diameter of the spring 60. The rear collar 23 is locked to the opening of the insertion hole 14 of the air hammer 10 and has a size that can also be locked to the tip of the retaining member 15 fixed to the tip of the air hammer 10.

  The guide 30 includes a front end portion 31 and a rear end portion 32, and the outer diameter of both is larger at the front end portion 31 than that of the rear end portion 32, and the inner diameter is the same. The inner diameter is preferably substantially equal to the outer diameter of the drift pin D. Further, the guide 30 has a cylindrical and thick circumferential wall, and the front end surface 31a of the circumferential wall is formed in a substantially donut shape in front view to constitute a striking surface. A cylindrical hole 32a penetrating the rear end portion 32 of the guide 30 is drilled at three positions at positions opposed to the ball grooves 21b formed at the three positions described above, and the ball 40 slides on the ball grooves 21b. Arranged freely. The ball 40 is engaged with the front end of the ball groove 21b to perform a retaining function. The width of the ring 50 that closes the outer opening of the hole 32a is set slightly larger than the opening.

Further, the retaining member 15 is fitted and fixed in a concave / convex groove 15 a formed at the tip of the air hammer 10.
(Other examples)
As described above, the guide is fitted to the snap so as to be displaceable in a predetermined range in the front-rear direction. For example, the following configuration may be employed.
(Example 2)
Example 2 is shown in FIG. The difference from the first embodiment is that the hole 32a drilled in the guide 30 is replaced with a screw hole 322a, the ball 40 is replaced with a screw 402, and a groove 212b in which the screw 402 slides within a predetermined range is formed and replaced with a ring. This is the point that constitutes the flange portion of the spring 602. It can be disassembled and is excellent in maintenance.
(Example 3)
Example 3 is shown in FIG. The difference from the first embodiment is that the engagement step portion 403 is formed by providing a small diameter portion and a large diameter portion on the inner peripheral surface of the guide 30, and the engagement portion 403 is engaged with the engagement step portion 403 on the distal end side of the snap 20. It is the point which forms the stop part 213a. Further, the snap 20 is divided into a separable tip portion and a base end portion, and a male screw 203a is formed at the rear end of the tip portion and a female screw groove 203b is formed at the base end portion. It can be connected together. It can be disassembled and is excellent in maintenance. As shown in FIG. 9, the locking step 403 can be formed on the distal end side of the snap 20 by, for example, fixing a distal end member 403 ′ by driving a pin or the like into the distal end of the snap 20.
Example 4
Example 4 is shown in FIG. The difference from the first embodiment is that a small diameter portion and a large diameter portion are provided on the inner peripheral surface of the guide to form a locking step portion 214a, and a groove 204b is formed on the peripheral surface of the tip of the snap 20 to provide a stopper ring 204a. It is fixed by protruding around. In addition, as shown in FIG. 11, as a configuration in which the locking step portion is formed, the rear end of the guide may be formed as a large-diameter portion, and the washer 214a ′ may be fitted into the large-diameter portion so as to be disassembled.
(Example 5)
Example 5 is shown in FIG. The shape of the inner peripheral surface on the rear end side of the guide 30 is a polygonal cross section (for example, a hexagonal shape), and the tip of the snap 20 is the same shape as the polygonal cross section. In addition, a female screw hole 325a is formed in the guide 30 so that the male screw 405 can be screwed in. A snap groove 215a in which the male screw 405 is locked is formed in the snap 20 at a position corresponding to the female screw 325a. Is done. The snap 20 is held in a direction that matches the inner surface of the guide 30 (holds in a direction in which all the vertices match), and is inserted from the rear of the guide 30 to the front. After passing through the cross-sectional polygonal portion 305a, the snap 20 is rotated so that the rear end surface of the cross-sectional polygonal portion 205a of the snap 20 and the front end surface of the cross-sectional polygonal portion 305a of the guide 30 abut ( For example, as shown in FIG. 12D, the relationship is such that one of the vertices hits between the other two vertices). Then, the male screw 405 is screwed into the female screw 325a, and the male screw 405 is fitted into the screw groove 215a. This embodiment can also be disassembled and is excellent in maintenance.
(About drive source)
Although the compressed air is used as the driving source for the impact force in the above embodiment, it may be electric.

The perspective view of Example 1 of this invention Exploded view of Embodiment 1 of the present invention Sectional drawing of Example 1 of this invention Partial sectional view of Embodiment 1 of the present invention The figure which shows the completion | finish stage of driving-in by Example 1 of this invention The figure which shows the snap and cross section of Example 1 of this invention. The figure which shows Example 2 of this invention. The figure which shows Example 3 of this invention. The figure which shows the modification of Example 3 of this invention. The figure which shows Example 4 of this invention. The figure which shows the modification of Example 4 of this invention. The figure which shows Example 5 and a cross section of this invention. The figure (the foundation foundation and pillar) which shows the timber and hardware etc. which are the target of the present invention The figure (column and beam) which shows the timber and the hardware etc.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Air hammer 11 Air cylinder chamber 12 Piston 13 Air supply means 14 Snap insertion hole 15 Retaining member 20 Snap 21 Snap front end part 21a Snap front end face 21b Ball groove 22 Snap front end part 22a Front end part 24a Snap rear end surface 30 guide 31 guide tips 31a guide the front end surface 32 guides the rear end portion 32a hole 32b guides the overall length l snap the rear end surface 40 ball 50 ring 60 spring L guide tips overall length S guide for Tip space M Wood D Drift pin H Hole P drilled in wood

Claims (4)

A snap (20) that strikes the drift pin, and a guide (30) that is fitted to the snap (20) so as to be displaceable in the front-rear direction and that holds the drift pin, are provided in the rear direction of the guide (30). The position where the front end surface (21a) of the snap (20) and the front end surface (31a) of the guide (30) protrude in the forward direction are substantially the same at the position where the displacement of the stop is stopped. Tip structure. A snap (20) for hitting the drift pin, and a guide (30) that is fitted to the snap (20) so as to be displaceable in the front-rear direction and hold the drift pin, and the guide (30) is displaced rearward. When the rear end surface (32b) of the guide (30) is in contact with the flange (22) of the snap (20), the front end surface (21a) of the snap (20) and the front end surface (31a of the guide (30)) ) Is a tip structure of a drift pin driving machine, characterized by having substantially the same protruding position in the forward direction. A snap (20) that strikes the drift pin; and a guide (30) that is fitted to the snap (20) so as to be displaceable in the front-rear direction and that holds the drift pin. L) and the overall length (l) of the tip (21) of the snap (20) are made substantially the same, and the front end surface (21a) of the snap (20) and the front end surface (31a) of the guide (30) are moved forward. The tip structure of a drift pin driving machine, characterized in that the protruding positions of are substantially the same. A drift pin driving machine comprising the tip structure according to claim 1.

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