JP2006321036A - Impact socket - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an impact socket which can rapidly perform the fastening operation of a bolt. <P>SOLUTION: The impact socket 10 comprises a receiving recessed portion 16 which is opened at the lower end portion of a socket body 12 and has a truncated pyramid shape inside surface so as to be narrowed toward the upper inside of the socket body 12, a slider 18 which is slidably fitted in the receiving recessed portion 16 of the socket body 12 and has a truncated pyramid shape outside shape to be fitted into the inside surface of the receiving recessed portion 16, and an energizing member 32 for energizing the slider 18 toward the lower end opening portion of the receiving recessed portion 16. The slider 18 is divided into a plurality of slider elements 19. When the slider 18 has been pushed into the depth of the receiving recessed portion 16 against the energizing force of the energizing member 32 and the slider elements 19 have been integrated together, a female screw hole 22 is formed inside the slider 18. On the contrary, when the slider 18 has been placed on the opening portion side of the receiving recessed portion 16 because of the energizing force of the energizing member 32, the slider elements 19 are released from the integrated state and the female screw hole 22 is enlarged. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an impact socket mainly used when a stud bolt is implanted in a workpiece.

  Conventionally, an impact socket 80 as shown in FIG. 16 is known. The impact socket 80 is formed with a connection hole 81 at the upper portion thereof, into which a drive shaft of an electric or manual wrench is fitted and connected. Further, the impact socket 80 is formed with a female screw hole 82 opened at the lower end. A steel ball 83 is fixed to the innermost part of the female screw hole 82.

  The operation when the stud bolt S is implanted in the workpiece W using the impact socket 80 having the above-described configuration is as follows. Usually, the stud bolt S is temporarily implanted by screwing it into a female screw hole formed in the workpiece W, for example, by rotating it 2-3 times.

  In this state, the female screw 82 of the impact socket 80 is screwed into the male screw portion of the upper end portion of the stud bolt S while the impact socket 80 is rotated. Then, when the stud bolt S enters the impact socket 80 until the upper end portion of the stud bolt S comes into contact with the steel ball 83 of the impact socket 80, the subsequent rotational force of the impact socket 80 is transmitted to the stud bolt S, The stud bolt S is tightened into the workpiece.

  Eventually, when the lower end of the stud bolt S comes into contact with the bottom of the female screw hole of the workpiece W, the fastening of the stud bolt S is completed. Then, the impact socket 80 is raised while being reversely rotated, and the impact socket 80 is removed from the male screw portion at the upper end portion of the stud bolt S. Thereby, implantation of the stud bolt S is completed.

  In the impact socket 80 as described above, the female screw portion of the impact socket 82 is inserted into the male screw portion of the stud bolt S until the upper end portion of the stud bolt S comes into contact with the steel ball 83 before the fastening of the stud bolt S is started. The time for screwing 82 and the time for removing the impact socket 80 from the stud bolt S after the stud bolt S has been tightened are inevitably taken. For this reason, since the total work time required for planting the stud bolt S becomes longer, for example, in the engine assembly line of an automobile, the tact time of the stud bolt S implantation process greatly affects the time required for the assembly line, and the assembly line It was difficult to shorten the required time.

In view of this, Patent Document 1 discloses a stud bolt implanted socket wrench capable of quickly grasping and separating a stud bolt. In this socket wrench, a pair of gripping claws are opened and a stud bolt is inserted between them. In this state, the pair of gripping claws are closed and a stud bolt is gripped between them. The stud bolt is fastened to the work by rotating the socket wrench including the pair of gripping claws while maintaining the state. When the tightening is completed, the socket wrench can be immediately separated from the stud bolt by opening the pair of gripping claws.
JP 2000-52263 A

  However, in the socket wrench disclosed in Patent Document 1, the male screw part of the stud bolt is clamped by a pair of gripping claws each having a semi-cylindrical inner surface. If it is weak, there is a problem in that slipping occurs between the stud bolts and transmission loss of the tightening force occurs, whereas if the gripping force by the gripping claws is strong, the male screw of the stud bolt is crushed.

  Therefore, the present invention provides an impact socket that can shorten the time for implanting the stud bolt by being able to be quickly attached and / or detached from the stud bolt, and can reliably transmit the tightening force to the stud bolt with a simple configuration. The task is to do.

In order to solve the above-described problem, an impact socket according to a first aspect of the present invention includes:
An accommodation recess having a truncated pyramid-shaped inner surface that opens at the lower end of the socket body and narrows toward the upper interior of the socket body;
A slider having a truncated pyramid-shaped outer shape that fits slidably within the housing recess of the socket body and fits the inner surface of the housing recess;
An urging member that urges the slider toward a lower end opening of the housing recess,
The slider is divided into a plurality of slider pieces, and the slider is pushed into the back of the housing recess against the biasing force of the biasing member, and the slider pieces are combined. When the slider is in a state, a female screw hole is formed inside the slider, and the slider is positioned on the opening side of the housing recess by the biasing force of the biasing member. The united state of the pieces is released, and the female screw hole is expanded in diameter.

  In the impact socket according to the first aspect of the present invention, the upper portions of the plurality of slider pieces engage with the engaging members so that the height positions of the slider pieces in the axial direction of the female screw holes are aligned. The slider is urged by the urging member via the engaging member, and each of the slider pieces and the engaging member press the respective slider pieces in a direction to release the combined state. You may contact | abut and engage in the inclined surface which acts force.

  Further, in the impact socket according to the first aspect of the present invention, the slider has a substantially quadrangular frustum shape or a substantially hexagonal frustum shape, and the slider is divided into four slider pieces. Also good.

  Furthermore, the impact socket of the 1st aspect of this invention WHEREIN: The said engagement member may have a substantially spherical surface part contact | abutted with the front-end | tip of the volt | bolt screwed in the said female screw hole.

The impact socket of the second aspect of the present invention is
An accommodation recess having a truncated pyramid-shaped inner surface that opens at the lower end of the socket body and narrows toward the upper interior of the socket body;
A slider having a truncated pyramid-shaped outer shape that fits slidably within the housing recess of the socket body and fits the inner surface of the housing recess;
A biasing member that biases the slider toward the back of the housing recess,
The slider is divided into a plurality of slider pieces, and the slider pieces are pushed into the back of the housing recess by the biasing force of the biasing member, and the slider pieces are in a combined state. Sometimes a female screw hole is formed inside the slider, and when the slider moves to the opening side of the housing recess against the biasing force of the biasing member, The combined state is released and the female screw hole is expanded in diameter.

  In the impact socket according to the second aspect of the present invention, the slider may have a substantially quadrangular frustum shape or a substantially hexagonal frustum shape, and the slider may be divided into four slider pieces. .

  In the impact socket according to the second aspect of the present invention, the slider piece may have a substantially spherical surface portion that comes into contact with a tip of a bolt that is screwed into the female screw hole when in the combined state. .

  In the impact socket according to the first and second aspects of the present invention, the slider has a substantially quadrangular pyramid or hexagonal frustum shape, and the slider is divided into two slider pieces. In the female screw hole formed by combining the two slider pieces, a screw thread is not formed or is low at a position corresponding to the joint portion of the slider piece and in the vicinity thereof. May be.

  Furthermore, in the impact socket according to the first and second aspects of the present invention, a holding member for holding the bolt in a self-supporting manner may be provided.

  In the impact socket according to the first aspect of the present invention, the slider is positioned on the opening side of the receiving recess by the biasing force of the biasing member, and the united state of the slider pieces is released and the female is released. With the screw hole expanded, the male thread portion of the stud bolt can be quickly received in the slider. Then, when the slider is pushed into the inner portion of the receiving recess against the biasing force of the biasing member and the slider piece is in a combined state, a female screw hole is formed inside the slider. The female screw meshes with the male screw portion of the stud bolt.

  When the impact socket is rotated in this state, the rotation of the socket main body is caused by the fact that the slider having the truncated pyramid-shaped outer shape is fitted in the accommodating recess having the truncated pyramid-shaped inner surface. As a result, the stud bolt is fastened to the female thread portion of the workpiece. At this time, since the male thread portion of the stud bolt is engaged with the female thread in the slider, the male thread of the stud bolt is not crushed.

  On the other hand, if the impact socket is raised with respect to the stud bolt after the stud bolt has been tightened, the slider moves to the opening side of the receiving recess by the biasing force of the biasing member, and The combined state of the slider pieces is released and the female screw hole is in a state in which the diameter of the female screw hole is expanded, so that the impact socket can be quickly removed from the stud bolt without reverse rotation.

  As described above, according to the impact socket of the first aspect of the present invention, the stud bolt can be quickly installed and removed, so that the stud bolt implantation time can be shortened, and the stud socket is fitted into the receiving recess of the truncated pyramid-shaped inner surface. The tightening force can be reliably transmitted to the stud bolt with a simple configuration of a slider having a truncated pyramid shape.

  In the impact socket according to the second aspect of the present invention, when the stud socket is attached to the male screw portion, it is necessary to rotate the impact socket and screw it into the female screw in the slider. When the impact socket is removed from the stud bolt after completion, if the impact socket is raised, the slider moves to the opening side of the housing recess against the biasing force of the biasing member, and the slide Since the union state of the moving piece is released and the female screw hole expands, the impact socket can be removed from the stud bolt without reverse rotation.

  As described above, according to the impact socket of the second aspect of the present invention, the stud bolt can be quickly removed from the stud bolt, so that the stud bolt implantation time can be shortened, and the truncated pyramid can be fitted into the receiving recess of the truncated pyramid-shaped inner surface. The tightening force can be reliably transmitted to the stud bolt with a simple configuration of the slider having the outer shape.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a longitudinal sectional view of an impact socket 10 according to the first embodiment of the present invention. The impact socket 10 has a substantially truncated cone socket body 12 made of, for example, metal or resin. A connection hole 14 having a square (or hexagonal) cross section, for example, is formed at the upper end of the socket body 12. The impact socket 10 is rotationally driven by fitting a drive shaft that forms a quadrangular column (or hexagonal column) of an electric or manual wrench into the connecting hole 14.

  An accommodation recess 16 having a quadrangular frustum-shaped inner surface is formed in the lower portion of the socket body 12. The housing recess 16 is formed at the lower end of the socket body 12 in a square shape, for example, and narrows toward the upper inside of the socket body 12. The inner surface of the accommodation recess 16 is not limited to a square frustum shape, and may be formed in another polygonal frustum shape (for example, a hexagonal frustum shape).

  A sliding element 18 is slidably fitted and accommodated in the accommodating recess 16. The slider 18 has a substantially quadrangular frustum-shaped outer shape that matches the gradient of the inner surface of the accommodating recess 16. As shown in FIG. 2A, the slider 18 includes a slider piece 19 divided into four on a square diagonal line on the bottom surface. A through hole 20 is formed in the upper end of the slider piece 19 in the combined state. Further, as shown in FIG. 2 (b), the slider piece 19 is formed with a female screw so that a single female screw hole 22 is formed inside the slider 18 in the combined state. Yes. An end portion of the female screw hole 22 is formed as an enlarged diameter portion 24, and the enlarged diameter portion 24 communicates with the through hole 20. In addition, the division | segmentation number of the slider 18 is not restricted to four, What is necessary is just two or more. Further, the slider 18 is not limited to a substantially quadrangular frustum shape, and may be another polygonal frustum shape (for example, a hexagonal frustum shape) that conforms to the inner surface shape of the housing recess 16.

  The corners of each slider piece 19 are chamfered in an R shape. By chamfering in this way, sliding of the slider 18 within the housing recess 16 of the socket body 12 can be performed smoothly without being caught. By chamfering, the outer dimensions of the slider piece 19 and thus the slider 18 are increased. Since it becomes slightly smaller, it contributes to the downsizing of the entire impact socket 10 including the socket body 12 that accommodates it, and each slider piece 19 is formed on the inner surface of each slider piece 19 when it is in a combined state. Even if a slight shift occurs in the connected portion of the female screw, there is an advantage that the engagement with the male screw screwed into the female screw hole 22 becomes smooth without being caught.

  Moreover, as shown in FIG. 3, the top part of the thread 26 of the internal thread formed in the slider piece 19 is also formed so as to be chamfered in an R shape. By forming in this way, when each slider piece 19 unites and embraces the male screw, the female screw of the slider 19 can be surely engaged with the male screw.

  Further, as shown in FIG. 2 (b), a step portion 28 is formed on the lower outer periphery of the slider piece 19 to constitute a contact portion with a cap member described later.

  As shown in FIG. 1, the upper portion of each slider piece 19 constituting the slider 18 is engaged so as to be caught by the constricted portion of the engaging member 30. Thereby, the height position of each slider piece 19 in the axial direction of the female screw hole 22 is aligned. Further, the slider 18 is urged toward the lower end opening of the housing recess 16 by a coil spring (biasing member) 32 through the engaging member 30. The biasing member is not limited to the coil spring, and may be another elastic member such as a leaf spring or rubber.

  As shown in FIG. 4, the engagement member 30 has a substantially inclined shape, and has a first inclined surface 34 and a second inclined surface 36 that face each other at the constricted portion. The upper portion of each slider piece 19 is in contact with and engaged with the first and second inclined surfaces 34 and 36, respectively. Since the upper part of each slider piece 19 is in contact with the first inclined surface 34 of the engagement member 30, the engagement member 30 is urged by the pressing force F by the coil spring 32. A force that presses the child piece 19 in a direction to release the united state (that is, a direction in which the piece 19 is pushed to the side) is applied.

  The engaging member 30 has a substantially spherical surface portion 38 at the lower end thereof. As shown in FIG. 5, when the stud bolt S is screwed into the female screw hole 22 of the slider 18, the tip end portion of the stud bolt S abuts on the substantially spherical surface portion 38 of the engaging member 30. . Thereby, when the stud bolt S is screwed into the female screw hole 22 of the slider 18 and tightened, the sticking between the female screw 22 of the slider 18 and the male screw of the stud bolt S is alleviated. It has become. Further, since the upper part of each slider piece 19 is in contact with the second inclined surface 36 of the engaging member 30, the tip of the stud bolt S tightened in the female screw hole 22 of the slider 18 is engaged. By pressing against the substantially spherical surface portion 38 of the combined member 30, a force f that presses each slider piece 19 in the direction of releasing the combined state (that is, the direction in which it is pushed sideways) as a component of the pressure contact force. It comes to work.

  Referring again to FIG. 1, a cap member 40 having an opening at the center is fixed to the lower end portion of the socket body 12. Normally, the slider 18 in the socket main body 12 is positioned on the opening side of the housing recess 16 by being biased downward by the coil spring 32 via the engaging member 30. At this time, the step portion 28 of each slider piece 19 is engaged with the opening edge of the cap member 40, so that each slider piece 19 is held in that position. When the slider 18 is positioned on the opening side of the housing recess 16, the united state is released by the action of a force that is pushed laterally by the first inclined surface 34 of the engaging member 30; Each slider piece 18 is in a state where its outer surface is in close contact with the inner surface of the housing recess 16, and at this time, the inner diameter D of the female screw hole 22 is larger than the diameter d of the stud bolt S. Yes.

Next, the operation and operation of the impact socket 10 having the above configuration will be described.
As shown in FIG. 1, the stud bolt S is temporarily implanted in the female screw hole 2 of the workpiece W by the lower end male screw portion 4 of the stud bolt S being screwed in, for example, 2 to 3 times. In this state, the upper end male screw portion 6 of the stud bolt S is inserted into the female screw hole 22 of the impact socket 10 in a state where the drive shaft of the electric or manual wrench is fitted in the connecting hole 14 of the socket body 12. The impact socket 10 is lowered. At this time, since the female screw hole 22 of the impact socket 10 has a larger diameter than the upper end male screw portion 6 of the stud bolt S, the stud bolt S can be easily and quickly received in the impact socket 10.

  When the impact socket 10 is lowered and pressed against the stud bolt S, the slider 18 is pushed into the innermost portion of the housing recess 16 against the urging force of the coil spring 32 as shown in FIG. At this time, each of the slider pieces 19 constituting the slider 18 is moved and united so as to approach each other by sliding along the truncated pyramid inner surface of the accommodating recess 16. A single female screw 22 formed in the slider 18 meshes with the upper male screw portion 6 of the stud bolt S. At this time, the upper end portion of the stud bolt S is in contact with the substantially spherical surface portion 38 of the engaging member 30.

  In this state, when the wrench is driven forward to rotate the impact socket 10 in the normal direction, the slider 18 having a truncated pyramid-shaped outer shape is fitted in the receiving recess 16 having the same truncated pyramid-shaped inner surface. Thus, the rotation of the socket body 12 is reliably transmitted to the slider 18, and as a result, the stud bolt S is fastened to the female screw portion 2 of the workpiece W. At this time, since the upper end male screw portion 6 of the stud bolt S is engaged with the female screw 22 in the slider 18, the upper end male screw portion 6 of the stud bolt S is not crushed.

  As shown in FIG. 7, the stud bolt S is fastened to the workpiece W until the lower end portion 8 of the stud bolt S comes into contact with the bottom of the female screw hole 2 of the workpiece W. When the fastening of the stud bolt S is completed, the impact socket 10 is lifted from the stud bolt S by releasing the pressing force of the impact socket 10 against the stud bolt S. The impact socket 10 may be rotated slightly backward at the start of the ascent. As a result, as shown in FIG. 8, the slider 18 moves to the opening side of the housing recess 16 by the biasing force of the coil spring 32. At this time, the screw threads of the upper end male screw portion 6 of the stud bolt S and the female screw 22 of the impact socket 10 are in contact with each other with a tapered surface having an apex angle of about 60 degrees. When the slider 18 is to be pulled out, a force is applied to push each slider piece 9 in the lateral direction by the taper surface of the thread of the upper end male thread portion 6 of the stud bolt S. Further, as described above, the first and second inclined surfaces 34 and 36 of the engaging member 30 also exert a force that pushes and spreads each slider piece 9 in the lateral direction. By these actions, when the slider 18 moves from the back of the housing recess 16 to the opening side, each slider piece 19 is pushed sideways so that its outer surface is the inner surface of the housing recess 16. As a result, the slider pieces 19 are uncombined and the female screw holes 22 in the slider 18 are expanded. Thereby, it is possible to quickly remove the impact socket 10 from the stud bolt S without reversely rotating the impact socket 10.

  As described above, according to the impact socket 10 of the present embodiment, the stud bolt S can be quickly attached and detached, so that the time for implanting the stud bolt S can be shortened, and the inside of the accommodating recess 16 of the truncated pyramid-shaped inner surface. The tightening force can be reliably transmitted to the stud bolt S with a simple configuration of the slider 18 having a truncated pyramid shape to be fitted.

  In the first embodiment, the stud bolt S is temporarily implanted in the workpiece W. However, like the impact socket 10a shown in FIG. The holding member 42 may be provided so that it can be held independently in a state of being inserted therein. The holding member 42 is supported by the cap member 41. For example, the holding member 42 can be configured by standing two to three bent leaf springs at the edge of the central opening of the washer member. Any device that fulfills the above requirements may be used.

  Next, the impact socket 50 according to the second embodiment of the present invention will be described with reference to FIG. 10. Since the impact socket 50 according to the present embodiment has a configuration similar to that of the impact socket 10, it mainly focuses on different points. Explained.

  In the lower part of the socket body 12 of the impact socket 50, an accommodation recess 16 having a square pyramid-shaped inner surface is formed. The housing recess 16 is formed at the lower end of the socket body 12 in a square shape, for example, and narrows toward the upper inside of the socket body 12.

  A sliding element 52 is slidably fitted and received in the receiving recess 16. The slider 52 has a substantially quadrangular frustum-shaped outer shape that matches the gradient of the inner surface of the accommodating recess 16. The slider 18 is composed of a slider piece 53 divided into four on a square diagonal line on the bottom surface. Each of the slider pieces 53 is formed with a female screw so that a single female screw hole 22 is formed inside the slider 52 in the combined state.

  Further, the slider piece 53 is formed with a stepped portion 56 that becomes a contact portion of the coil spring 54. Each slider piece 53 is urged toward the back of the housing recess 16 by a coil spring 54 having one end supported by a cap member 58 fixed to the lower end of the socket body 12. In normal times, the slider pieces 53 are located in the innermost portion of the housing recess 16 by the urging force of the coil spring 54 and are combined. In the innermost part of the female screw hole 22 of the slider 52 constituted by the slider pieces 53 combined in this manner, a substantially spherical shape that comes into contact with the upper end portion of the stud bolt S screwed into the female screw hole 22. A surface portion 60 is formed. Since other configurations are the same as those of the impact socket 10, the same reference numerals are given to the same configurations and description thereof is omitted.

Next, the operation and operation of the impact socket 50 having the above configuration will be described.
As shown in FIG. 10, the stud bolt S is temporarily implanted in the female screw hole 2 of the workpiece W by screwing the lower end male screw portion 4 of the stud bolt S by, for example, two to three turns. In this state, the upper end male screw portion 6 of the stud bolt S is inserted into the slider 52 of the impact socket 50 in a state where the drive shaft of the electric or manual wrench is fitted in the connecting hole 14 of the socket body 12. Then, the impact socket 50 is lowered. Then, the impact socket 50 is rotated by driving the wrench in the normal direction, and the upper end male screw portion 6 of the stud bolt S is screwed into the female screw portion 22 in the slider 52.

  As shown in FIG. 11, the impact socket 50 is fastened to the upper end male screw portion 6 until the tip end of the stud bolt S comes into contact with the substantially spherical surface portion 60 of the slider 52. When the tip of the stud bolt S comes into contact with the substantially spherical surface portion 60 of the slider 52, the subsequent rotational force of the impact socket 50 is transmitted to the stud bolt S, and the stud bolt S is transferred to the female screw hole 2 of the workpiece W. It will be screwed.

  As shown in FIG. 12, the stud bolt S is fastened to the workpiece W until the lower end portion 8 of the stud bolt S contacts the bottom of the female screw hole 2 of the workpiece W. When the fastening of the stud bolt S is completed, the impact socket 50 is lifted from the stud bolt S by releasing the pressing force of the impact socket 50 against the stud bolt S. The impact socket 50 may be rotated slightly backward at the start of the ascent.

  When the impact socket 50 is raised, as shown in FIG. 13, the slider 52 moves toward the lower end opening of the housing recess 16 against the urging force of the coil spring 54. At this time, since the respective screw threads of the upper end male screw portion 6 of the stud bolt S and the female screw 22 of the impact socket 50 are in contact with each other with a tapered surface having an apex angle of about 60 degrees, the fixed stud bolt S is fixed. When the slider 52 is to be pulled out, a force is exerted to push and spread each slider piece 53 laterally by the taper surface of the thread of the upper end male thread portion 6 of the stud bolt S. By this action, when the slider 52 moves from the inner part of the housing recess 16 to the opening side, each slider piece 53 is pushed sideways so that its outer surface becomes the inner surface of the housing recess 16. The slider pieces 53 move so as to be separated from each other while closely contacting each other. As a result, the combined state of the slider pieces 53 is released and the female screw hole 22 in the slider 52 is expanded. Thereby, it is possible to quickly remove the impact socket 50 from the stud bolt S without rotating it in reverse.

  As described above, according to the impact socket 50 of the present embodiment, the stud bolt S can be quickly removed, thereby shortening the implantation work time of the stud bolt S and fitting into the accommodating recess 16 on the inner surface of the truncated pyramid. The fastening force can be reliably transmitted to the stud bolt S with a simple configuration of the slider 52 having the truncated pyramid shape.

  In the impact socket 50 of this embodiment, the holding member 42 may be provided so that the upper end male screw portion 6 of the stud bolt S can be held independently in a state where the stud bolt S is inserted into the slider 52.

  By the way, in the impact sockets 10 and 50 of the first and second embodiments, the sliders 18 and 52 are divided into four parts. However, like the slider 70 shown in FIG. 72 may be used. In this case, when the sliders 18 and 52 are pulled out from the upper end male screw portion 6 of the stud bolt S, in order to release the engagement of the female screw 22 of the slider piece 72 from the upper end male screw 6 of the stud bolt S. Needs to increase the opening amount B of the slider piece 72. If the opening amount B is to be increased, it is necessary to increase the moving stroke amount of the slider 72, which leads to an increase in the size of the entire impact socket.

  Therefore, in order to prevent the impact socket from becoming large even when the slider is divided into two parts, as shown in FIGS. 15 (a) and 15 (b), two slider pieces 76 constituting the slider 74 are provided. The thread of the female screw 22 is not formed or lowered at a position corresponding to the joint portion of each slider piece 76 and in the vicinity thereof. As a result, the opening amount b of the slider piece 72 required for releasing the engagement of the female screw 22 of the slider piece 76 from the upper end male screw 6 of the stud bolt S can be reduced, and consequently the impact. An increase in the size of the socket as a whole can be avoided.

The longitudinal cross-sectional view of the impact socket of 1st Embodiment. The top view and longitudinal cross-sectional view of a slider. The figure which shows the top part shape of the thread of the internal thread of a slider. The figure which shows a slider piece and an engaging member. The figure which shows the slider piece and the engaging member which embraced the stud bolt. The figure which shows the state by which the stud bolt was inserted in the impact socket. The figure which shows the state which tightened the stud bolt with the impact socket. The figure which shows the state at the time of removing an impact socket from a stud bolt. The longitudinal cross-sectional view of the impact socket which provided the holding member. The longitudinal cross-sectional view of the impact socket of 2nd Embodiment. The figure which shows the state which screwed the stud bolt into the impact socket. The figure which shows the state which tightened the stud bolt with the impact socket. The figure which shows the state at the time of removing an impact socket from a stud bolt. The figure which shows the slider comprised with the slider piece divided into two. The figure which shows the state which opened one of the slider pieces of the slider divided into 2 which has not formed the internal thread partially. The figure which shows an example of the conventional impact socket.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10,50 ... Impact socket 12 ... Socket main body 16 ... Accommodating recessed part 18, 52 ... Slider 19, 53 ... Slider piece 22 ... Female screw hole or female screw 30 ... Engagement member 32, 54 ... Coil spring (attached) Force member)
34 ... 1st inclined surface 36 ... 2nd inclined surface 38,60 ... substantially spherical surface part S ... stud bolt

Claims (9)

An accommodation recess having a truncated pyramid-shaped inner surface that opens at the lower end of the socket body and narrows toward the upper interior of the socket body;
A slider having a truncated pyramid-shaped outer shape that fits slidably within the housing recess of the socket body and fits the inner surface of the housing recess;
An urging member that urges the slider toward a lower end opening of the housing recess,
The slider is divided into a plurality of slider pieces, and the slider is pushed into the back of the housing recess against the biasing force of the biasing member, and the slider pieces are combined. When the slider is in a state, a female screw hole is formed inside the slider, and the slider is positioned on the opening side of the housing recess by the biasing force of the biasing member. An impact socket, wherein the united state of the pieces is released and the female screw hole is expanded.   The upper portions of the plurality of slider pieces are respectively engaged with engaging members so that the height positions of the slider pieces in the axial direction of the female screw holes are aligned, and the sliders engage the engaging members. The slider pieces and the engagement members are abutted and engaged with inclined surfaces that apply a force to press the slider pieces in the direction of releasing the combined state. The impact socket according to claim 1, wherein the impact socket is provided.   3. The slider according to claim 1, wherein the slider has a substantially square frustum shape or a substantially hexagonal frustum shape, and the slider is divided into four slider pieces. 4. Impact socket.   The impact socket according to claim 2, wherein the engagement member has a substantially spherical surface portion that comes into contact with a tip of a bolt that is screwed into the female screw hole. An accommodation recess having a truncated pyramid-shaped inner surface that opens at the lower end of the socket body and narrows toward the upper interior of the socket body;
A slider having a truncated pyramid-shaped outer shape that fits slidably within the housing recess of the socket body and fits the inner surface of the housing recess;
A biasing member that biases the slider toward the back of the housing recess,
The slider is divided into a plurality of slider pieces, and the slider pieces are pushed into the back of the housing recess by the biasing force of the biasing member, and the slider pieces are in a combined state. Sometimes a female screw hole is formed inside the slider, and when the slider moves to the opening side of the housing recess against the biasing force of the biasing member, An impact socket, wherein the combined state is released and the female screw hole expands in diameter.   6. The impact socket according to claim 5, wherein the slider has a substantially quadrangular frustum shape or a substantially hexagonal frustum shape, and the slider is divided into four slider pieces. .   6. The impact socket according to claim 5, wherein the slider piece has a substantially spherical surface portion that comes into contact with a tip of a bolt that is screwed into the female screw hole when in the combined state.   The slider has a substantially quadrangular frustum shape or a substantially hexagonal frustum shape, and the slider is divided into two slider pieces. By combining the two slider pieces, 6. The impact socket according to claim 1 or 5, wherein in the formed female screw hole, a screw thread is not formed or is low at a position corresponding to the joint portion of the slider piece and in the vicinity thereof. .   6. The impact socket according to claim 1, further comprising a holding member for holding the bolt by itself.

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