JP2010142907A - Manual hammer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manual hammer which is a manually operated, however, can give a larger striking force to a part near a welding part to be struck. <P>SOLUTION: The manual hammer includes a body 11, a striking member 17 movable along an axial direction CL to one end part of the body 11, a striking spring 15 arranged in the body and compressed to store a striking spring force, a slide hammer 16 arranged in the body to hold one end part of the striking spring, a preventing means 6 for preventing the slide hammer from moving to the striking member side in the body, a manual rotating and operating part 30 held so as to be rotatable relative to the body by using a hinge part and manually rotated to press and compress the other end part of the striking spring 15 and store the striking spring force in the striking spring 15 between the slide hammer 16 and the manual rotating and operating part 30 and a return spring 21 arranged between the striking member and the slide hammer. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a manual striking tool, and more particularly to a manual striking tool that accumulates a striking spring force by a manual rotation operation and applies a striking force to a striking target using the tip of a striking member such as a rod.

There is a manual hitting tool disclosed in Patent Document 1. This manual hammering tool is used for punching processing that prevents the tip of the drill from dancing before drilling. The operator holds the case and the punch head is hit by the operator. By pressing, the striking force is stored in the striking spring in the case and held by the locking of the triggering means, and the locking of the triggering means is released and the striking target is plastically deformed by the striking force of the striking spring.
JP 2004-188540 A

  By the way, when welding is performed on a thick metal part, the metal structure in the vicinity of the welded part is affected by the applied heat, residual stress may remain, and the fatigue strength of the metal part may decrease. In order to solve this problem, the outer edge of the welded portion is struck and plastically deformed, and the residual stress on the pressing side caused by the deformation is relieved of the tensile residual stress at the time of welding. There are ways to reduce the drop.

In such a stress relaxation process of the welded portion, it is necessary to repeatedly apply a strong impact, and thus the manual impact tool described in Patent Document 1 has a problem that the impact force is insufficient.
Accordingly, an object of the present invention is to provide a manual striking tool capable of giving a large striking force while being manual in order to solve the above-described problems.

  In order to solve the above-mentioned problem, the manual impact tool of the present invention is a manual impact tool that applies impact force to an impact target, and a part of the impact is applied to the cylindrical main body and one end of the main body. A striking member that is movable in the axial direction with respect to one end of the main body, a striking spring that is disposed in the main body and stores a spring force for striking by being compressed, and the striking spring in the main body A slide hammer arranged closer to one end, a blocking means for preventing the slide hammer from moving to the striking member side in the main body, and a hinge part for holding the main body rotatably. A manual rotation operation unit that stores the spring force for hitting in the hitting spring between the slide hammer by pressing and compressing the other end of the hitting spring by manually rotating, The tip of the striking member By pressing the portion against the hitting object and pushing it into the main body, the movement of the slide hammer to the hitting member side by the blocking means is released, and the hitting member is given the spring force of the hitting spring to the hitting object It is characterized by striking.

In the manual impact tool of the present invention, the main body has a main body cover, a front end cover fixed to the first end portion of the main body cover, and a rear end cover fixed to the second end portion of the main body cover. And
The rear end cover is provided with the manual rotation operation portion, and the manual rotation operation portion is movable in the axial direction within the main body cover, and a push pin for pressing and compressing the other end portion of the impact spring. A lever that is rotatably attached to the rear end cover using a hinge pin, and an end portion of the lever and the push pin are connected to rotate the lever along the axial direction. And a link bar that changes the operation of compressing the other end of the impact spring by pushing a push pin.

  In the manual impact tool of the present invention, the blocking means is provided so as to be movable in a direction perpendicular to the axial direction with respect to the slide hammer and a stepped portion protruding into the main body cover, and contacts the stepped portion. A stop pin that prevents the slide hammer from moving toward the striking member, a switching rod that switches the stop pin between a position that protrudes from the slide hammer and hits the stepped portion and a position that fits in the slide hammer, and It has another return spring which is arrange | positioned in a slide hammer and is arrange | positioned between the said switching rod and the said slide hammer, It is characterized by the above-mentioned.

  According to the present invention, it is possible to provide a manual striking tool capable of giving a large striking force while being manual.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a side view showing a preferred embodiment of the manual impact tool of the present invention, and FIG. 2 is an axial sectional view showing an example of the internal structure of the manual impact tool shown in FIG.
As shown in FIGS. 1 and 2, the manual impact tool 10 includes a cylindrical main body 5, an impact spring 15, a slide hammer 16, a blocking means 6, a punch 17 as an impact member, and a first return. A spring 21 and a manual rotation operation unit 30 are provided.

  As shown in FIG. 2, the main body 5 includes a cylindrical main body cover 11, a front end cover 12, and a rear end cover 13. The main body cover 11, the front end cover 12, and the rear end cover 13 are metal members, and the front end cover 12 is fitted and fixed to the first end portion 11 </ b> B of the main body cover 11. A rear end cover 13 is fitted and fixed to the second end portion 11 </ b> C of the main body cover 11.

  In a space surrounded by the main body cover 11, the front end cover 12 and the rear end cover 13, a push pin 14, a striking spring 15, a slide hammer 16, a part of a punch 17, two stop pins 18, A stop collar 19, a switching rod 20, a first return spring 21 and a second return spring 22 are accommodated.

  As shown in FIG. 2, the manual rotation operation unit 30 includes a push pin 14, a lever 30 </ b> L, a plate 33, and a link bar 34. The push pin 14 is a member that can move in the main body cover 11 in the axial direction CL and press and compress the other end of the impact spring 15. A plate 33 is integrally fixed to the end of the lever 30L, and the plate 33 is rotatably attached to the rear end cover 13 using a hinge pin 35.

  As shown in FIG. 2, the lever 30 </ b> L has a ball 31 and a rod 32. The nigiri ball 31 is fixed to one end of the rod 32. The other end of the rod 32 is fixed to the plate 33 by screws 33N. The link bar 34 is substantially L-shaped, and one end thereof is rotatably connected to the plate 33 by a hinge pin 36. The other end of the link bar 34 is rotatably connected to the end of the push pin 14 by a hinge pin 37. By this link member 34, the rotation operation of the lever 30 </ b> L is changed to an operation of pushing the push pin 14 along the axial direction CL, whereby the push pin 14 compresses the impact spring 15.

  The blocking means 6 shown in FIG. 2 includes a stop collar 19 that forms a step portion 19A, two stop pins 18, a switching rod 20, and a second return spring 22. The retaining collar 19 is a cylindrical member that is inscribed and fixed in the main body cover 11. A step portion 19 </ b> A is formed in the main body cover 11 by the end portion of the retaining collar 19.

  The retaining pins 18 are bowl-shaped with both ends rounded, and are housed one by one in two through-holes 16C formed in the peripheral wall of the slide hammer 16. These retaining pins 18 are movable with respect to the slide hammer 16 in a direction perpendicular to the axial direction CL (diameter direction of the main body cover 11). These two stop pins 18 come into contact with a step portion 19A formed by the end portion of the stop collar 18 to prevent the slide hammer 16 from moving to the punch 17 side (X1 direction).

  The switching rod 20 has a first position where the stop pin 18 protrudes from the slide hammer 15 and contacts the step portion 19A, and the slide hammer 16 accommodates the stop pin 18 in the slide hammer 15 so as not to contact the step portion 19A. Is a rod-shaped member for switching between the second position that allows the lens to move to the punch 17 side (X1 direction). The second return spring 22 is disposed in the bottomed hole of the slide hammer 16, and is disposed between the end portion of the switching rod 20 and the inner bottom portion of the slide hammer 16.

Here, the example of a shape of each structural member of the manual impact tool 10 is demonstrated with reference to FIGS.
FIG. 3 shows the shapes of the main body cover 11 and the tip cover 12. The main body cover 11 is a cylindrical member, and the first end portion 11B and the second end portion 11C are open end portions. The tip cover 12 has a tapered portion 12B and a fitting portion 12C. As shown in FIG. 2, the tip cover 12 has a through hole 12D. A large diameter portion 17B of the punch 17 can move in the through hole 12D along the axial direction CL.

  As shown in FIG. 3, the first end portion 11 </ b> B of the main body cover 11 is formed with a recess 11 </ b> D for fitting and fixing the fitting portion 12 </ b> C of the tip cover 12. A concave portion 11F for fitting and fixing the fitting portion 13B of the rear end cover 13 shown in FIG. 2 is formed in the second end portion 11C of the main body cover 11 shown in FIG. A hole 11H is formed in the first end portion 11B of the body cover 11, and a hexagon socket screw 11P is screwed into the hole 11H. The screw 11P fixes the locking collar 19 in the main body cover 11.

  FIG. 4 is a perspective view showing the shapes of the punch 17 and the switching rod 20 shown in FIG. The metal punch 17 has a large diameter portion 17B, a tip portion 17C, a small diameter portion 17D, a stopper portion 17F, and a contact portion 17G. The distal end portion 17C is hemispherical, and the disc-shaped stopper portion 17F prevents the punch 17 from moving in the X1 direction by abutting against the inner end portion 12K of the distal end cover 12 shown in FIG.

  The switching rod 20 shown in FIG. 4 has a drum shape, and has thick contact portions 20B and 20C and a thin intermediate portion 20D. The contact portion 20B of the switching rod 20 is abutted against the contact portion 17G of the punch 17. The contact portion 20C is abutted against one end portion 22B of the second return spring 22 as shown in FIG.

  FIG. 5A is a cross-sectional view showing the shape of the slide hammer 16 shown in FIG. The slide hammer 16 is a metal cylindrical member with a bottom, and has a space portion 16B that accommodates the second return spring 22 and two hole portions 16C that accommodate the retaining pins 18 one by one. The hole portion 16 </ b> C is opened in a direction perpendicular to the axial direction CL in the peripheral wall at the center of the slide hammer 16. The other end portion 22C of the second return spring 22 is fixed to the inner bottom portion 16D of the space portion 16B. A protrusion 16T is provided at the bottom end of the slide hammer 16.

  FIG. 5B shows an example of the shape of the retaining collar 19 shown in FIG. The stop collar 19 is a metal cylindrical member, and is fixed so as to be in close contact with the inner peripheral portion of the first end portion 11B of the main body cover 11 as shown in FIG. The other end of the stop collar 19 is a portion forming a step portion 19A, and the inner peripheral side is chamfered to form a slope. FIG. 5C shows the shape of the set pin 18 shown in FIG.

FIG. 6A is a perspective view showing the shape of the push pin 14 shown in FIG. A protrusion 14B is provided at one end of the push pin 14, and a hole 14C through which the hinge pin 37 is passed is formed at the other end.
FIG. 6B shows the shape of the link bar 34 shown in FIG. 2. The link bar 34 has a substantially L-shape, and the hinge pin 36 is provided at one end and the other end of the link bar 34, respectively. , 37 are formed through holes 34B and 34C.
FIG. 6C is a perspective view showing the ball ball 31, the rod 32, and the plate 33 of the lever 30L shown in FIG. The plate 33 is formed with holes 33B and 33C through which the hinge pins 35 and 36 pass, respectively.

The striking spring 15 shown in FIG. 2 is a coil spring for storing a striking force for striking the punch 17 against a striking target.
The large diameter portion 17B of the punch 17 shown in FIG. 2 passes through the through hole 12D of the tip cover 12, and the contact portion 20B of the switching rod 20 is abutted against the contact portion 17G of the punch 17. . The first return spring 21 is coaxially disposed along the axial direction CL with respect to the punch 17, and the first return spring 21 is disposed between the stopper portion 17 </ b> F of the punch 17 and the stopper portion 16 </ b> K of the slide hammer 16. Has been placed.
The fixing collar 19 shown in FIG. 2 is in close contact with the inner peripheral surface of the first end portion 11B of the main body cover 11, and is fixed using a hexagon socket screw 11P. The outer diameter of the slide hammer 16 is slightly smaller than the inner diameter of the stop collar 19, and the slide hammer 16 can move along the axial direction CL on the inner peripheral surface of the stop collar 19.

The second return spring 22 shown in FIG. 2 is accommodated in the slide hammer 16, and one end portion of the second return spring 22 is abutted against the contact portion 20 </ b> C of the switching rod 20, and the other end of the second return spring 22. The part is fixed in the slide hammer 16. The two set pins 18 are slidably fitted in the holes 16C of the slide hammer 16 shown in FIG. 5 in a direction perpendicular to the axial direction CL. As shown in FIG. 2, the two retaining pins 18 abut against the stepped portion 19 </ b> A formed by the end of the retaining collar 19 and abut against the inner peripheral surface of the main body cover 11.
As shown in FIG. 2, a striking spring 15 is held between the protrusion 16 </ b> T of the slide hammer 16 and the protrusion 14 </ b> B of the push pin 14. The first return spring 21, the second return spring 22, and the impact spring 15 are arranged along the axial direction CL.

Next, with reference to FIGS. 7-10, the usage example of the manual impact tool 10 is demonstrated.
When the manual striking tool 10 is manually rotated by rotating the lever 30L in the R direction with the hinge pin 35 as a center, the striking spring 15 is compressed to store the spring accumulating force for striking, and the punch 17 is pressed against the striking target. The spring accumulating force of the striking spring 15 is released, and the tip portion 17 of the punch 17 strikes the striking target.

In FIG. 7, the striking spring 15 does not store a spring accumulating force for striking, and shows an initial open state and a no-load state.
In the no-load state shown in FIG. 7, the rod 32 of the lever 30 </ b> L is held at an angle θ with respect to the axial direction CL of the main body cover 11.

  The user holds the body cover 11 with one hand, holds the ball 31 with the other hand, and rotates the rod 32 shown in FIG. 7 in the R direction around the hinge pin 35 shown in FIG. As shown in the figure, when it is made substantially parallel to the axial direction CL, an impact spring accumulating force is stored in the impact spring 15.

  That is, as apparent from comparison between FIGS. 7 and 8, the link bar 34 that connects the end of the lever 30L and the push pin 14 linearly moves the push pin 14 in the X1 direction by rotating the lever 30L. Change to action. Thereby, the push pin 14 is pushed along the axial direction CL, and the other end part of the impact spring 15 is compressed.

  On the other hand, since the stop pin 18 is pressed by the step portion 19A formed at the end of the stop collar 19, the slide hammer 16 cannot move in the X1 direction, and the position remains fixed. 16 and the main body cover 11 do not move relative to each other in the axial direction CL, and the slide hammer 16 is fixed. As a result, the striking spring 15 is compressed between the push pin 14 and the slide hammer 16, and the striking spring 15 can easily and reliably store the striking spring accumulating force.

  Next, FIG. 9 is a state in which the movement of the slide hammer 16 in the X1 direction is allowed, and FIG. 10 is a view showing a state in which the hit object is hit by the punch 17.

  As shown in FIG. 9, when the user presses the striking tool 10 in the X1 direction in a state where the tip 17C of the punch 17 is in contact with the striking target 100, the punch 17 is covered with the tip cover. 12 enters the X2 direction from the inside, and the switching rod 20 is pushed in the X2 direction. For this reason, the first return spring 21 and the second return spring 22 are compressed, as can be seen by comparing the state of FIG. 8 with the state of FIG.

  Further, the switching rod 20 is pushed into the slide hammer 16. As a result, the position where the two stop pins 18 contact each other moves from the outer peripheral surface of the large diameter contact portion 20C of the switching rod 20 to the outer peripheral surface of the small intermediate portion 20D, and the two stop pins 18 move in the radial direction. It becomes possible to move inward.

  Then, the stop pin 18 enters the slide hammer 16 by the cooperative action of the slope formed by chamfering the inner end of the stop collar 19 and the initial extension of the compressed impact spring 15 described above, and the step portion 19A and the locking pin 18 are unlocked. As a result, the slide hammer 16 can enter the stop collar 19. That is, that is, the two stop pins 18 enter the slide hammer 16 so as to approach each other, and the slide hammer 16 is located inside the stop collar 19 along the X1 direction (toward the distal end portion 17C side of the punch 17). It will be ready to enter.

For this reason, as shown in FIG. 10, the spring accumulating force for hitting the hitting spring 15 is directly transmitted to the punch 17 by the movement of the slide hammer 16 in the X1 direction, and the tip portion 17C of the punch 17 is hit 100. Blow.
In the state shown in FIGS. 9 to 10, the first return spring 21 and the second return spring 22 are in a compressed state.

  In the impact tool 10, the user holds the main body cover 11 with one hand and keeps the ball ball 31 pressed with the other hand. Since the user can support the lever 30L by holding the ball ball 31 with his hand, the user can press the punch 17 while supporting the punch 17 stably and easily. Thereby, the manual striking tool 10 can reliably and stably strike the striking target 100.

When one hitting operation is completed and the user rotates the lever 30L from the state of FIG. 10 back to the state shown in FIG. 7 in the R1 direction, the state returns to the initial state shown in FIG. That is, the compression return force of the first return spring 21 and the second return spring 22 returns the slide hammer 16 to the original position along the X2 direction. Further, the compression return force of the second return spring 22 pushes the switching rod 20 from the slide hammer 16. Then, the position of contact with the two stop pins 18 moves from the outer peripheral surface of the small intermediate portion 20D of the switching rod 20 to the outer peripheral surface of the large diameter contact portion 20C. Extruded. As a result, the two locking pins 18 move in the X2 direction and are locked to the stepped portion 19A formed at the end of the locking collar 19. The manual impact tool 10 described above has the lever 30L in the state shown in FIG. 7 to return to the state shown in FIG. 7 and by repeating the operations of FIGS. 8 to 10, the user can hit the hit target 100 a plurality of times.

  Compared with the conventional manual hitting tool in which the user pushes in the axial direction and stores the hitting force in the spring, the manual hitting tool 10 according to the present invention only hits the lever 30L by a predetermined angle and hits using the lever principle. A large spring accumulating force for striking the spring 15 can be stored. For this reason, it is possible to obtain a large striking force necessary for striking the vicinity of the welded portion by the stress relaxation treatment of the welded portion. In addition, a large number of hits can be easily given to the hit target.

  That is, the manual striking tool of the above-described embodiment can apply a greater striking force to the striking target by operating the manual rotation operation unit 30 while being manual.

  In the manual impact tool of the above-described embodiment, the user can easily store the spring accumulating force for impact on the impact spring via the push pin only by rotating the lever 30L.

  In the manual impact tool of the present invention of the above embodiment, as described above, the blocking means is composed of the step portion 19A protruding into the main body cover, the stop pin 18, the switching rod 20, and the second return spring 22. The spring accumulating force of the striking spring can be reliably applied to the striking target at the time of striking.

  In the manual impact tool of the above embodiment, the lever includes a rod and a ball ball fixed to the end of the rod. Thereby, the user can perform the operation | work which holds a ball ball and rotates a lever reliably, and presses against a striking member side.

  By the way, this invention is not limited to the said embodiment, A various modified example is employable. For example, the body cover 11 may have a shape other than a cylindrical member so that the user can easily hold it with one hand.

It is a side view which shows preferable embodiment of the manual impact tool of this invention. It is sectional drawing of the axial direction which shows the internal structural example of the manual impact tool shown in FIG. It is a figure which shows the shape of a main body cover and a front-end | tip cover. It is a perspective view which shows the shape of the punch and switching rod which are shown in FIG. It is a figure which shows a slide hammer, a stop collar, and a stop pin. It is a figure which shows a push pin, a link bar, etc. It is a figure which shows the state at the time of no load, in which the spring accumulating force for striking is not stored in the striking spring. It is a figure which shows the state by which the spring accumulating force for striking was stored in the striking spring. It is a figure which shows the state which the front-end | tip part of the punch contacted the hit | damage object and two stop pins were open | released. It is a figure which shows the state which is hit | damaging with respect to a hit | damage object with a punch.

Explanation of symbols

5 Body 6 Blocking means 10 Manual impact tool 11 Body cover 12 Rear end cover 14 Push pin 15 Impact spring 16 Slide hammer 17 Punch (striking member)
18 Stop Pin 19 Stop Collar 21 First Return Spring 22 Second Return Spring 30 Manual Rotation Operation Unit 30L Lever 31 Nigiri Ball 32 Rod 33 Plate 34 Link Bar 35 Hinge Pin

Claims (3)

A manual impact tool that gives impact force to an impact target,
A tubular body,
A striking member that partially protrudes from one end of the main body and is movable along the axial direction with respect to one end of the main body
A striking spring that stores the spring force for striking by being arranged and compressed in the main body,
A slide hammer arranged closer to one end side than the impact spring in the main body,
Blocking means for blocking the slide hammer from moving toward the striking member in the main body;
It is rotatably held using a hinge portion with respect to the main body, and is manually rotated so that the other end portion of the impact spring is pressed and compressed between the slide hammer and the impact spring. And a manual rotation operation unit that stores the spring force of
The movement of the sliding hammer toward the striking member by the blocking means is released by pressing the tip of the striking member against the striking object and pushing it into the main body, and the spring force of the striking spring is applied to the striking member. A manual striking tool characterized by giving and striking the striking object. The main body has a main body cover, a front end cover fixed to the first end portion of the main body cover, and a rear end cover fixed to the second end portion of the main body cover,
The rear end cover is provided with the manual rotation operation unit,
The manual rotation operation unit includes:
A push pin that is movable in the axial direction within the main body cover and that compresses the other end of the impact spring;
A lever rotatably attached to the rear end cover using a hinge pin;
A link bar that connects the end of the lever and the push pin, and changes the rotation of the lever into an operation of pressing the push pin along the axial direction and compressing the other end of the impact spring;
The manual impact tool according to claim 1, comprising: The blocking means is
A step projecting into the body cover;
A stop pin that is provided so as to be movable in a direction perpendicular to the axial direction with respect to the slide hammer, and that prevents the slide hammer from moving toward the striking member by hitting the stepped portion;
A switching rod for switching the stop pin between a position protruding from a slide hammer and hitting the stepped portion and a position falling within the slide hammer;
The manual impact tool according to claim 1, further comprising: another return spring disposed in the slide hammer and disposed between the switching rod and the slide hammer.

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