JP4456841B2 - wrench - Google Patents

Description

  The present invention relates to a wrench that grips the outer peripheral surface of a member having a substantially cylindrical shape and rotates the member.

  Conventionally, for example, a wrench is used to efficiently tighten or loosen a fastening member such as a nut and a bolt.

  For example, as such a wrench, Japanese Utility Model Laid-Open No. 56-11076 (Patent Document 1), Japanese Utility Model Laid-Open No. 3-33066 (Patent Document 2), Japanese Patent Application Laid-Open No. 7-68473 (Patent Document 3), etc. There is what is described.

  Wrenches (spanners) described in Japanese Utility Model Laid-Open No. 56-11076, Japanese Utility Model Laid-Open No. 3-33066, and Japanese Patent Application Laid-Open No. 7-68473 are mounted on the outer peripheral surface of a fastening member such as a bolt and a nut. It has an inner peripheral surface, and has a structure in which a plurality of rollers (wedge members) are arranged on the inner peripheral surface. The wrench having such a configuration grips the outer peripheral surface of the fastening member by the plurality of rollers, and the roller bites into the outer peripheral surface of the fastening member when the handle portion of the wrench is rotated in one direction. Thus, a “one-way clutch” is employed that tightens the fastening member with respect to another member. In the wrench using the one-way clutch, when changing the tightening direction of the fastening member, it is necessary to turn the wrench upside down and to reverse the front and back.

  A wrench that employs a “two-way clutch” that grips the outer peripheral surface of the fastening member and rotates the fastening member, regardless of the direction of rotation of the handle portion of the wrench, is, for example, Japanese Utility Model Laid-Open No. 61-105572. No. (Patent Document 4) and Japanese Patent Application Laid-Open No. 61-164781 (Patent Document 5).

  In the wrench described in Japanese Utility Model Publication No. 61-105572, a rotating body having an engaging portion that engages with a nut or a bolt is rotatably attached to the tip of a handle portion, and is wound around the outer periphery of the rotating body. Further, both ends of the linear body are fixed at predetermined positions on the proximal end side of the handle portion. Then, the nut or the bolt is rotated in either direction by sandwiching the wedge member so as to be freely inserted into and removed from each portion where the rotating body and the end portion of each linear body start to contact each other. It is configured to be able to.

Further, the wrench described in Japanese Patent Application Laid-Open No. 61-164781 can be rotated between two end positions in the housing, and at one end position, the handwheel is in the first direction with respect to the housing. Although the rotation in the second direction is permitted, the rotation of the ratchet wheel is prevented from rotating in the second direction with respect to the housing at the other end position. A pawl member that allows rotation in the first direction, and is configured such that the bolt, nut, etc. of the tool can be rotated in either direction according to the position of the pawl member. Yes.
Japanese Utility Model Publication No. 56-11076 Japanese Utility Model Publication No. 3-33066 JP 7-68473 A Japanese Utility Model Publication No. 61-105572 Japanese Patent Laid-Open No. 61-164781

  However, in the wrench described in Japanese Utility Model Publication No. 61-105572, the size of the engaging portion (hexagonal hole) that engages the nut or bolt of the rotating body is determined. There was a problem that it could only handle matched bolts or nuts and was not versatile. Further, a structure for tightening hexagonal bolts and nuts is provided, and for example, a structure for tightening a cylindrical fastening member has not been considered.

  Further, the wrench described in Japanese Patent Application Laid-Open No. 61-164781 has a complicated structure for rotating the pawl wheel. In addition, since the size of the drive member connected to the bolt or nut of the tool is determined, only the bolt or nut suitable for the size of the drive member can be dealt with, and there is a problem that there is no versatility. there were.

  An object of the present invention is to solve such a conventional problem and rotate a member having a substantially cylindrical shape by selecting one of the two directions without changing the front and back of the wrench. It is an object of the present invention to provide a versatile wrench having a bi-directional clutch mechanism that has a simple structure with almost no idle rotation of the member, and that can cope with changes in the size of the member. And

  In order to achieve this object, the present invention provides a wrench for rotating a member having a substantially cylindrical shape, a holding portion having an inner peripheral surface capable of accommodating the outer periphery of the member, and a circumferential direction of the inner peripheral surface A locking member that is held movably within a certain range, a play area that is formed on the inner peripheral surface and that can move the lock member, and a circumference that is formed on the inner peripheral surface and sandwiches the play area. Provided with a wrench that is disposed on both sides in the direction and includes a wedge region that protrudes the lock member from the inner peripheral surface, and a switching means that switches the lock member to move to one of the wedge regions. It is.

  The wrench having this configuration has a substantially cylindrical shape inserted into the holding portion only by switching the locking member so that it moves to either one of the wedge regions by switching means without reversing the front and back of the wrench. The provided member can be securely held by the inner peripheral surface of the holding portion and the lock member, and one of the two directions can be selected and rotated. Moreover, even if the size of the member having the substantially cylindrical shape is changed, it is possible to cope with the size change by adjusting the amount by which the lock member protrudes from the inner peripheral surface, and the versatility is high. Become a wrench.

  The wrench according to the present invention further includes urging means for urging the lock member from the play area to the wedge area, and the switching means moves the lock member to one of the wedge areas. The urging direction of the urging means can be switched. By configuring in this way, by switching the switching means, the locking member can be moved to one of the wedge regions more reliably by the biasing means.

  In the wrench according to the present invention, the urging means may be provided on both sides of the lock member in the moving direction, and the urging means may be switched by the switching means so that the urging means urges the lock member. it can. The wrench having this structure hardly rotates idle when a member having a substantially cylindrical shape is tightened.

  The holding part may have a circular ring shape in plan view.

  The wedge region may include an inclined portion that presses the lock member to protrude from the inner peripheral surface.

  In addition, the inclined portion is formed in line symmetry with respect to the center line of the holding portion, and can be inclined so as to approach the inner peripheral surface as the distance from the center line increases.

  Furthermore, the lock member includes a hollow cylindrical member and a cylindrical pin inserted into the hollow portion of the cylindrical member, and is held by the cylindrical pin so as to be movable in the accommodating portion in which the play area and the wedge area are formed. It can also be configured. In addition to the advantages described above, the wrench having this configuration can provide a simpler configuration in which one locking member is provided and only the urging direction of the urging unit is switched by the switching unit.

  In the wrench according to the present invention, a plurality of accommodating portions in which the play area and the wedge area are formed are formed along the entire inner peripheral surface, and the lock member is disposed on a retainer disposed on the inner peripheral surface. It is also possible to hold a plurality of the lock members and dispose the lock members in the storage portions. In this case, each lock member may be configured to be urged by the urging means via the retainer.

  In addition to the advantages described above, the wrench having this configuration is simple in that the lock member can be moved from the play area to the wedge area by a single retainer only by switching the urging direction of the urging means by the switching means. A configuration can be provided.

  The wrench according to the present invention has a substantially cylindrical shape inserted into the holding portion only by switching the lock member to move to one of the wedge regions by the switching means without reversing the front and back of the wrench. The member can be securely gripped by the inner peripheral surface of the holding portion and the lock member, and can be rotated by selecting one of the two directions with almost no idle rotation. In addition, it is possible to provide a highly versatile wrench that has a simple structure and can cope with changes in the size of the member.

  Next, a wrench according to a preferred embodiment of the present invention will be described with reference to the drawings. In addition, Examples 1-7 described below are exemplifications for explaining the present invention, and the present invention is not limited only to these embodiments. The present invention can be implemented in various forms without departing from the gist thereof.

  1 is a partial cross-sectional view taken along line II of FIG. 2 of the wrench according to the first embodiment, FIG. 2 is a partial cross-sectional view taken along line II-II shown in FIG. FIG. 4 is a partially enlarged view of the wrench shown in FIG. 1 and shows a state in which the switching unit is moved to one side. FIG. 4 is a partially enlarged view of the wrench shown in FIG. FIG. 5 is a diagram illustrating a state in which the lock member, the biasing member, and the switching unit are removed from the wrench illustrated in FIG. 3. However, in FIG. 3 and FIG. 5, hatching indicating a cross section is not described for easy understanding of the structure.

  As shown in FIGS. 1 to 5, the wrench 1 according to the first embodiment has an inner peripheral surface 12 that can accommodate the outer periphery of the substantially cylindrical member (hereinafter referred to as “fastening member 100”) shown in FIG. 2. A holding part 11 and a handle part 13 fixed to the holding part 11 are provided.

  The holding part 11 is provided with a circular ring shape having a circular hole 30 penetratingly formed in a substantially central part thereof in a plan view. The fastening member 100 can be inserted into the circular hole 30, and the inner peripheral surface 12 is defined by the circular hole 30. An accommodating portion 15 in which the lock member 14 is movably accommodated is formed on the inner peripheral surface 12 of the holding portion 11 on the side on which the handle portion 13 is fixed.

  The lock member 14 includes two rings 21D and 21U and a cylindrical pin 19 inserted into the holes of the rings 21D and 21U. The rings 21 </ b> D and 21 </ b> U are fixed to both ends of the cylindrical pin 19 by, for example, retaining rings.

  The accommodating portion 15 is formed with ring accommodating portions 35D and 35U for movably accommodating the rings 21D and 21U on both sides of the wrench in the thickness direction (see FIGS. 2 and 4).

  The ring housing portion 35D has a substantially central portion (near the center line O of the holding portion 11 shown in FIG. 1) that connects the ring 21D constituting the lock member 14 in the circumferential direction of the inner peripheral surface 12 (hereinafter simply referred to as “circumferential direction”). The play area 16D is movably accommodated. Further, both sides in the circumferential direction sandwiching the play area 16D are wedge areas 17DA and 17DB that project the ring 21D from the inner peripheral surface 12 toward the center of the holding portion 11. Specifically, the ring housing portion 35D has such a width (depth) that the ring 21D does not protrude from the inner peripheral surface 12 when the ring 21D is located at a substantially central portion. Further, the inner walls on both sides of the center line O of the ring housing portion 35D are formed symmetrically with respect to the center line O, and are inclined so as to approach the inner peripheral surface 12 as the distance from the center line O increases in the circumferential direction. Inclined portions 18DA and 18DB are formed.

  Further, an insertion hole 20 into which the cylindrical pin 19 inserted into the hollow portion of the lock member 14 is movably inserted is formed in the housing portion 15. The insertion hole 20 is opened in a long hole shape as shown in FIG. 5 so that the ring 21D can move in the circumferential direction while rotating (in contact with) the inclined portions 18DA and 18DB.

  In addition, since the ring accommodating part 35U and the ring 21U are provided with the same structure as the ring accommodating part 35D and the ring 21D, the description is abbreviate | omitted by replacing D attached to a code | symbol with U.

  Locking portions 25 </ b> A and 25 </ b> B are disposed outside the housing portion 15 and on both sides in a direction substantially perpendicular to the center line O. The locking portions 25A and 25B include spherical bodies 31A and 31B that are respectively locked in engaging grooves 24A and 24B formed in the switching portions 23A and 23B, which will be described in detail later, and a tapered coil spring that biases the spherical bodies 31A and 31B. 32A and 32B are provided. As shown in FIG. 3, when the switching portion 23B is moved in the arrow X direction, the locking portion 25B engages the spherical body 31B with the engagement groove 24B and locks the switching portion 23B at this position. It has become. When the switching portion 23A moves in the arrow Y direction (see FIG. 3), the urging force of the spring 32B acts on the sphere 31B, and the engagement between the sphere 31B and the engagement groove 24B is released. At the same time, the locking portion 25A engages the spherical body 31A with the engaging groove 24A and locks the switching portion 23A at this position.

The locking member 14 is moved from the play area 16D (16U) to the wedge areas 17DA and 17DB (17UA and 17UB) on both sides of the center line O between the center portions O of the cylindrical pins 19 constituting the lock member 14. One end of each of the coil springs 22 </ b> A and 22 </ b> B is attached as an urging means for urging). The other ends of the coil springs 22A and 22B are attached to the switching portions 23A and 23B, respectively. The switching portions 23A and 23B are attached so as to be movable in a substantially vertical direction with respect to the center line O of the holding portion 11. In accordance with the movement of the switching portions 23A and 23B, switching is performed so that one of the coil springs 22A and 22B biases the lock member 14. Engaging grooves 24A and 24B for locking the spherical bodies 31A and 31B of the locking portions 25A and 25B are formed in the switching portions 23A and 23B.

  Next, a specific operation of the wrench 1 according to the first embodiment will be described with reference to the drawings.

  When it is desired to rotate the fastening member 100 clockwise (arrow CW direction shown in FIG. 1), the switching portion 23B is pushed in the arrow X direction shown in FIGS. 1 and 3, and the lock member 14 is moved in the arrow X direction by the coil spring 22B. Energize to. At this time, the sphere 31B is engaged with the engagement groove 24B formed in the switching portion 23B, and this state is maintained. By this operation, the cylindrical pin 19 of the lock member 14 moves in the insertion hole 20 in the direction of the arrow X, and the rings 21D and 21U move in the direction of the arrow X while contacting the inclined portions 18DA and 18UA, that is, the wedge region 17DA and After moving to 17UA, the rings 21D and 21U protrude from the inner peripheral surface 12 as shown by the solid line in FIG.

  From this state, the handle portion 13 is rotated counterclockwise (arrow CCW direction shown in FIG. 1) to return the rings 21D and 21U to the play areas 16D and 16U, and the rings 21D and 21U do not protrude from the inner peripheral surface 12. In this manner, the fastening member 100 is inserted into the circular hole 30. Next, when the counterclockwise rotation of the handle portion 13 is released, the rings 21D and 21U are moved again to the wedge regions 17DA and 17UA by the urging force of the coil spring 22B and project from the inner peripheral surface 12. By this operation, the fastening member 100 is gripped between the inner peripheral surface 12 and the lock member 14 (rings 21D and 21U). When the handle portion 13 is rotated in the clockwise direction in this state, the fastening member 100 is securely tightened to the inner peripheral surface 12 and the lock member 14 by the wedge effect of the lock member 14, and there is almost no idle rotation and the holding portion 11. Rotate clockwise as a unit.

  Here, the distance that the lock member 14 moves from the play area to the wedge area side is determined according to the size (length of the diameter) of the fastening member 100. Therefore, even if the size of the fastening member 100 is changed, the distance that the lock member 14 moves to the wedge region side, that is, the amount by which the lock member 14 protrudes from the inner peripheral surface 12 can be adjusted according to the size. it can. For this reason, it becomes a highly versatile wrench that can be used for fastening members of different sizes.

  When the rotation of the fastening member 100 is finished, if the handle portion 13 is rotated counterclockwise, the lock member 14 returns to the play areas 16D and 16U, and the fastening member 100, the inner peripheral surface 12 and the lock member 14 are returned. And the wedge effect does not occur, and the rotation of the fastening member 100 is completed.

  On the other hand, when it is desired to rotate the fastening member 100 inserted into the circular hole 30 of the holding portion 11 in the counterclockwise direction (the arrow CCW direction shown in FIG. 1), the switching portion 23 </ b> A is changed without changing the front and back of the wrench 1. If pushed in the direction of the arrow Y shown in FIGS. 1 and 3, the locking member 14 is urged in the direction of the arrow Y by the coil spring 22A and the engaging groove 24A is formed in the switching portion 23A as described above. To maintain this state. By this operation, the rings 21D and 21U move to the wedge regions 17DB and 17UB while contacting the inclined portions 18DB and 18UB, and the rings 21D and 21U protrude from the inner peripheral surface 12. By this operation, the fastening member 100 is securely fastened to the inner peripheral surface 12 and the lock member 14 by the wedge effect of the lock member 14 and rotates counterclockwise together with the holding portion 11 as described above. . When the rotation of the fastening member 100 is terminated, the handle portion 13 may be rotated clockwise.

  Next, a wrench according to Embodiment 2 of the present invention will be described with reference to the drawings.

  FIG. 6 is a cross-sectional view of the wrench according to the second embodiment taken along line VI-VI shown in FIG. 8, FIG. 7 is a diagram showing a state where the wrench switching unit shown in FIG. 6 is moved, and FIG. It is sectional drawing along the VIII-VIII line shown in FIG.

  In the second embodiment, the same members as those described in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIGS. 6 to 8, the wrench 2 according to the second embodiment is fixed to the holding unit 11 having the inner peripheral surface 12 that can accommodate the outer periphery of the fastening member 100 shown in FIG. 6, and the holding unit 11. A handle 13 is provided.

  On the inner peripheral surface 12 of the holding portion 11 on the side to which the handle portion 13 is fixed, an accommodation portion 45 in which the lock member 44 is movably accommodated is formed.

  The lock member 44 includes a hollow cylindrical member 51 and a cylindrical pin 19 that is inserted into a hollow portion of the cylindrical member 51. And the cylindrical pin 19 is being fixed in the state extended from the both ends of the cylindrical member 51, especially as shown in FIG.

  The accommodating portion 45 has an arc shape that is symmetrical with respect to the center line O of the holding portion 11 on the handle portion 13 side, and the vicinity of the center line O moves the lock member 44 in the circumferential direction of the inner peripheral surface 12. It becomes the play area 46 for accommodating. Further, both sides in the circumferential direction sandwiching the play area 46 are wedge areas 47A and 47B that allow the lock member 44 to protrude from the inner peripheral surface 12 toward the center of the holding portion 11. The accommodating portion 45 has a width (depth) at which the lock member 44 does not protrude from the inner peripheral surface 12 when the lock member 44 is positioned at the substantially central portion. In Example 2, arc-shaped inner walls formed on both sides in the circumferential direction with the center line O interposed therebetween correspond to the inclined portion in the present invention.

  Further, insertion holes 50D and 50U into which both ends of the cylindrical pin 19 are movably inserted are formed at both ends of the accommodating portion 45 in the thickness direction of the wrench 2 (the vertical direction in FIG. 8). The insertion holes 50 </ b> D and 50 </ b> U are opened in a long hole shape so that the lock member 44 can move along the arcuate inner wall of the accommodating portion 45 and move to both sides in the circumferential direction while rotating (contacting).

  On the outer side of the housing portion 45 on the handle portion 13 side and on the center line O, a locking portion 55 is disposed. The locking portion 55 includes a sphere 56 that is locked in one of engagement grooves 54A and 54B formed in the switching portion 53, which will be described in detail later, and a tapered coil spring 57 that biases the sphere 56. Has been. As shown in FIG. 6, when the switching unit 53 is moved in the direction of the arrow CCW, the locking unit 55 engages the sphere 56 with the engagement groove 54B and locks the switching unit 53 at this position. It has become. On the other hand, when the switching unit 53 moves in the direction of the arrow CW as shown in FIG. 7, the urging force of the spring 57 acts on the sphere 56, and the engagement between the sphere 56 and the engagement groove 54B is released. At the same time, the locking portion 55 engages the sphere 56 in the engaging groove 54A and locks the switching portion 53 at this position.

  The switching unit 53 has a plate shape having a substantially fan shape, and is attached to the center line O of the holding unit 11 so as to be movable within a predetermined range in the circumferential direction. A semi-oval cutout 58 is formed on the inner peripheral surface 12 side of the switching portion 53 so that the cylindrical pin 19 is movably engaged. As will be described later in detail, the switching portion 53 defines both sides of the notch 58 (both sides in the rotation direction of the switching portion 53), but the lock member 44 moves to one of the wedge regions 47A and 47B. Thus, when the switching portion 53 is switched, the locking member 44 is locked to prevent the locking member 44 from moving to the other of the wedge regions 47A and 47B. As shown in FIG. 8, the switching portion 53 has elongated holes 61 and 62 into which locking pins 59 and 60 erected from the lower surface on the center line O of the holding portion 11 are movably inserted. ing. A leaf spring 63 that biases the lock member 44 is attached to the locking pin 59. Reference numerals 64 </ b> A and 64 </ b> B are locking pins for locking both arms of the leaf spring 63.

  Next, a specific operation of the wrench 2 according to the second embodiment will be described with reference to the drawings.

  When it is desired to rotate the fastening member 100 in the clockwise direction, the switching unit 53 is pushed in the counterclockwise direction (the arrow CCW direction shown in FIG. 6). By this operation, the locking pins 59 and 60 are relatively moved in the clockwise direction of the long holes 61 and 62 (the direction indicated by the arrow CW in FIG. 6). The leaf spring 63 biases the lock member 44 counterclockwise. Accordingly, the cylindrical member 51 constituting the lock member 44 moves from the play area 46 to the wedge area 47A while contacting the arc-shaped inner wall of the accommodating portion 45, and the cylindrical pin 19 contacts the insertion hole 50D. However, it moves to the counterclockwise side of the notch 58. By this operation, the lock member 44 protrudes from the inner peripheral surface 12. Further, the sphere 56 is locked in the engagement groove 54B, and this state is maintained.

  From this state, the handle 13 is rotated counterclockwise (arrow CCW direction shown in FIG. 6) to return the lock member 44 to the play area 46 so that the lock member 44 does not protrude from the inner peripheral surface 12. The fastening member 100 is inserted into the circular hole 30. The lock member 44 is locked by a locking portion 58B formed on the clockwise side of the notch 58, and does not move to the wedge region 47B in the opposite direction. Next, when the counterclockwise rotation of the handle portion 13 is released, the lock member 44 is moved again to the wedge region 47 </ b> A by the urging force of the leaf spring 63 and protrudes from the inner peripheral surface 12. When the handle portion 13 is rotated clockwise in this state, the fastening member 100 is securely tightened by the inner peripheral surface 12 and the lock member 44 due to the wedge effect of the lock member 44, and there is almost no idle rotation, and the holding portion 11. And rotate clockwise.

  Here, the distance that the lock member 44 moves from the play area to the wedge area side is determined according to the size (length of the diameter) of the fastening member 100. Therefore, even if the size of the fastening member 100 is changed, the distance that the lock member 44 moves to the wedge region side, that is, the amount by which the lock member 44 protrudes from the inner peripheral surface 12 can be adjusted according to the size. it can. For this reason, it becomes a highly versatile wrench that can be used for fastening members of different sizes.

  When the rotation of the fastening member 100 is finished, if the handle 13 is rotated counterclockwise, the lock member 44 returns to the play area 46, and the space between the fastening member 100 and the inner peripheral surface 12 and the lock member 14 is reached. Thus, the wedge effect is not generated, and the rotation of the fastening member 100 is completed.

  On the other hand, when it is desired to rotate the fastening member 100 inserted into the circular hole 30 of the holding part 11 in the counterclockwise direction (arrow CCW direction shown in FIG. 7), the switching part 53 is moved to the arrow CW as shown in FIG. When pushed in the direction, the locking pins 59 and 60 are relatively moved in the counterclockwise direction of the long holes 61 and 62 (the direction indicated by the arrow CCW in FIG. 7). The leaf spring 63 biases the lock member 44 in the clockwise direction. Accordingly, the cylindrical member 51 constituting the lock member 44 moves from the play area 46 to the wedge area 47B while contacting the arcuate inner wall of the accommodating portion 45, and the cylindrical pin 19 is formed in the switching portion 53. The notch 58 moves in the counterclockwise direction while contacting the notch 58. By this operation, the lock member 44 protrudes from the inner peripheral surface 12, and the fastening member 100 is gripped between the inner peripheral surface 12 and the lock member 14. Further, the sphere 56 is locked in the engagement groove 54B, and this state is maintained.

  When the handle portion 13 is rotated clockwise in this state, the fastening member 100 is securely tightened by the inner peripheral surface 12 and the lock member 44 due to the wedge effect of the lock member 44 and integrated with the holding portion 11. Rotate clockwise.

  In the second embodiment, the case where the leaf spring 63 is used as the biasing means for biasing the lock member 44 has been described. However, the present invention is not limited thereto, and a torsion coil spring or the like is used instead of the leaf spring 63. Also good.

  Next, a wrench according to Example 3 of the present invention will be described with reference to the drawings.

  9 is a cross-sectional view of the wrench according to the third embodiment taken along line IX-IX shown in FIG. 11, FIG. 10 is a diagram showing a state where the wrench switching unit shown in FIG. 9 is moved, and FIG. It is sectional drawing along the XI-XI line shown in FIG.

  In the third embodiment, the same members as those described in the first and second embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIGS. 9 to 11, the main point of the wrench 3 according to the third embodiment different from the wrench 2 according to the second embodiment is the configuration of the switching unit 73. That is, the switching unit 73 has a plate shape having a substantially rectangular shape, and is substantially perpendicular to the center line O of the holding unit 11 (in the direction of the arrow X shown in FIG. 9 and the direction of the arrow Y shown in FIG. 10). It is mounted so as to be movable within a predetermined range. A semi-oval cutout 58 is formed on the inner peripheral surface 12 side of the switching portion 73 so that the cylindrical pin 19 is movably engaged. In the switching portion 73, the portions defining both sides of the notch 58 (both sides in the moving direction of the switching portion 73) move the switching portion 53, and the lock member 44 moves to one of the wedge regions 47A and 47B. When switching is performed, the locking member 44 is locked, and the locking member 58A and 58B prevent the locking member 44 from moving to the other of the wedge regions 47A and 47B. As shown in FIG. 11, the switching portion 73 has an elongated hole 71 into which a locking pin 59 erected from the lower surface on the center line O of the holding portion 11 is movably inserted. A leaf spring 63 that biases the lock member 44 is attached to the locking pin 59. Both the arms of the leaf spring 63 are locked by locking pins 64A and 64B.

  The specific operation of the wrench 3 according to the third embodiment is almost the same as that of the wrench 2 according to the second embodiment. That is, in the second embodiment, the fan-shaped switching unit 53 is moved clockwise or counterclockwise, the lock member 44 is moved to the shift of the wedge region 47A or 47B, and the lock member 44 protrudes from the inner peripheral surface 12. However, in the third embodiment, the switching unit 73 is moved in a direction substantially perpendicular to the center line O of the holding unit 11 (the direction of the arrow X shown in FIG. 9 and the direction of the arrow Y shown in FIG. 10). The only difference is that the member 44 is moved to the shift of the wedge region 47A or 47B, and the lock member 44 protrudes from the inner peripheral surface 12.

  Next, a wrench according to Example 4 of the present invention will be described with reference to the drawings.

  12 is a plan view of the wrench according to the fourth embodiment, with a part cut away, FIG. 13 is a cross-sectional view taken along line XIII-XIII shown in FIG. 15, and FIG. 14 is shown in FIG. The figure which shows the state which moved the switch part of the wrench, FIG. 15: is sectional drawing along the XV-XV line | wire shown in FIG.

  In the fourth embodiment, the same members as those described in the first, second, and third embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIGS. 12 to 15, the wrench 4 according to the fourth embodiment is mainly different from the wrench 3 according to the third embodiment in that a plurality of accommodating portions 45 are formed over the entire circumference of the inner peripheral surface 12 of the holding portion 11. And the plurality of locking members 44 are accommodated in the retainer 81, and the entire retainer 81 rotates in the circumferential direction of the inner peripheral surface 12, whereby the locking member 44 is moved from the play area 46 to the wedge area 47A or 47B. This is the point to be moved and the configuration of the switching unit 83.

  On the inner peripheral surface 12 of the holding portion 11, a plurality of accommodating portions 45 in which the lock member 44 is movably accommodated are formed over the entire circumference. A retainer 81 is installed on the inner peripheral surface 12 so as to be rotatable in the circumferential direction. The retainer 81 has an accommodation groove 84 for accommodating the lock member 44 rotatably and immovably in the circumferential direction. Are formed at appropriate intervals. By configuring the retainer 81 to accommodate the lock member 44 in this way, in the present embodiment, the plurality of lock members 44 move integrally with the retainer 81 in the circumferential direction.

  The switching unit 83 has a plate shape having a substantially rectangular shape, and is predetermined in a substantially vertical direction (the arrow X direction shown in FIG. 13 and the arrow Y direction shown in FIG. 14) with respect to the center line O of the holding unit 11. Mounted movably within range. One end of a leaf spring 85 that biases the retainer 81 is attached to a substantially central portion of the switching portion 83 so as to be movable within a predetermined range in a direction substantially perpendicular to the center line O (longitudinal direction of the switching portion 83). ing. The other end of the leaf spring 85 is fixed to the retainer 81.

  Next, specific operations of the spanner 4 according to the fourth embodiment will be described with reference to the drawings.

  In order to rotate the fastening member 100 in the clockwise direction, the switching unit 83 is pushed in the arrow X direction shown in FIG. By this operation, the leaf spring 85 biases the retainer 81 counterclockwise, and the retainer 81 moves counterclockwise (arrow CCW direction) as shown in FIG. By this movement, the lock member 44 moves integrally with the retainer 81 from the play area 46 to the wedge area 47A while coming into contact with the arc-shaped inner wall of the accommodating portion 45. By this operation, the lock member 44 protrudes from the inner peripheral surface 12, and the sphere 56 is locked in the engagement groove 54B, and this state is maintained.

  From this state, the handle 13 is rotated counterclockwise (arrow CCW direction) to return the lock member 44 to the play area 46 so that the lock member 44 does not protrude from the inner peripheral surface 12 and the fastening member 100 is moved. Insert into the circular hole 30. Next, when the counterclockwise rotation of the handle portion 13 is released, the lock member 44 is moved again to the wedge region 47 </ b> A by the urging force of the leaf spring 85 and protrudes from the inner peripheral surface 12. When the handle portion 13 is rotated clockwise in this state, the fastening member 100 is securely tightened evenly in the circumferential direction by the inner peripheral surface 12 and the lock member 44 by the wedge effect of the lock member 44, There is almost no idle rotation and it rotates in the clockwise direction together with the holding part 11.

  When the rotation of the fastening member 100 is finished, if the handle 13 is rotated counterclockwise, the lock member 44 returns to the play area 46, and the space between the fastening member 100 and the inner peripheral surface 12 and the lock member 14 is reached. Thus, the wedge effect is not generated, and the rotation of the fastening member 100 is completed.

  On the other hand, when the fastening member 100 inserted into the circular hole 30 of the holding portion 11 is to be rotated counterclockwise (arrow CCW direction), as shown in FIG. 14, the switching portion 53 is pushed in the arrow Y direction. Similarly to the above, the leaf spring 85 urges the retainer 81 in the clockwise direction (arrow CW direction). As a result, the lock member 44 is integrated with the retainer 81 and moves from the play area 46 to the wedge area 47 </ b> B while contacting the arc-shaped inner wall of the housing portion 45. By this operation, the lock member 44 protrudes from the inner peripheral surface 12, and the fastening member 100 is gripped between the inner peripheral surface 12 and the lock member 14. Further, the sphere 56 is locked in the engagement groove 54B, and this state is maintained.

  When the handle portion 13 is rotated clockwise in this state, the fastening member 100 is securely tightened evenly in the circumferential direction by the inner peripheral surface 12 and the lock member 44 by the wedge effect of the lock member 44, There is almost no idle rotation and it rotates in the clockwise direction together with the holding part 11.

  Next, a wrench according to Example 5 of the present invention will be described with reference to the drawings.

  FIG. 16 is a cross-sectional view of the wrench according to the fifth embodiment taken along line XVI-XVI shown in FIG. 18, FIG. 17 is a diagram showing a state where the wrench switching unit shown in FIG. 16 is moved, and FIG. It is sectional drawing along the XVIII-XVIII line shown in FIG.

  In the fifth embodiment, the same members as those described in the second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIGS. 16 to 18, the wrench 5 according to the fifth embodiment locks the plate spring 63 that biases the lock member 44 from the wrench 2 according to the second embodiment and both arms of the plate spring 63. The locking pins 64A and 64B are removed.

  Since the specific operation of the wrench 5 having this configuration is almost the same as that of the wrench 2 according to the second embodiment, the details other than the different parts will not be described in detail, but the fastening member 100 is rotated clockwise using the wrench 5. When the switch part 53 is pushed counterclockwise (arrow CCW direction shown in FIG. 16), the sphere 56 is locked in the engagement groove 54B, and this state is maintained.

  From this state, the handle 13 is rotated counterclockwise (arrow CCW direction shown in FIG. 16) to return the lock member 44 to the play area 46 so that the lock member 44 does not protrude from the inner peripheral surface 12. The fastening member 100 is inserted into the circular hole 30. The lock member 44 is locked by a locking portion 58B formed on the clockwise side of the notch 58, and does not move to the wedge region 47B in the opposite direction. Next, when the rotation of the handle portion 13 in the counterclockwise direction is released and the handle portion 13 is rotated in the clockwise direction, the cylindrical member 51 of the lock member 44 maintains its position due to inertia, and the lock member is relatively moved. 44 moves from the play area 46 to the wedge area 47 </ b> A and protrudes from the inner peripheral surface 12. By this operation, the fastening member 100 is securely tightened by the inner peripheral surface 12 and the lock member 44 due to the wedge effect of the lock member 44, and there is almost no idle rotation and rotates in the clockwise direction integrally with the holding portion 11. .

  When the rotation of the fastening member 100 is finished, if the handle 13 is rotated counterclockwise, the lock member 44 returns to the play area 46, and the space between the fastening member 100 and the inner peripheral surface 12 and the lock member 14 is reached. Thus, the wedge effect is not generated, and the rotation of the fastening member 100 is completed.

  On the other hand, when it is desired to rotate the fastening member 100 inserted into the circular hole 30 of the holding portion 11 in the counterclockwise direction (the arrow CCW direction shown in FIG. 17), as shown in FIG. When the handle portion 13 is pushed in the direction, and the handle portion 13 is rotated in the counterclockwise direction, the fastening member 100 is securely tightened by the wedge effect of the inner peripheral surface 12 and the lock member 44 and integrated with the holding portion 11 as described above. Rotate counterclockwise.

  Next, a wrench according to Example 6 of the present invention will be described with reference to the drawings.

  FIG. 19 is a cross-sectional view of the wrench according to the sixth embodiment taken along line XIX-XIX shown in FIG. 21, FIG. 20 is a diagram showing a state where the wrench switching unit shown in FIG. 19 is moved, and FIG. It is sectional drawing along the XXI-XXI line | wire shown in FIG.

  Note that in the sixth embodiment, the same members as those described in the third embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIGS. 19 to 21, the wrench 6 according to the sixth embodiment has a leaf spring 63 that urges the lock member 44 and a locking pin 59 to which the leaf spring 63 is attached from the wrench 3 according to the third embodiment. And a configuration in which the locking pins 64A and 64B for locking both arms of the leaf spring 63 are removed, and the long hole 71 for movably inserting the locking pin 59 into the switching portion 73 is not opened. I have.

  The specific operation of the wrench 6 according to the sixth embodiment is substantially the same as that of the wrench 5 according to the fifth embodiment. That is, in the fifth embodiment, the fan-shaped switching portion 53 is moved clockwise or counterclockwise, the lock member 44 is moved to the shift of the wedge region 47A or 47B, and the lock member 44 protrudes from the inner peripheral surface 12. However, in the sixth embodiment, the switching unit 73 is moved in a direction substantially perpendicular to the center line O of the holding unit 11 (the direction of the arrow X shown in FIG. 19 and the direction of the arrow Y shown in FIG. 20). The only difference is that the member 44 is moved to the shift of the wedge region 47A or 47B, and the lock member 44 protrudes from the inner peripheral surface 12.

  Next, a wrench according to Example 7 of the present invention will be described with reference to the drawings.

  22 is a cross-sectional view of the wrench according to the seventh embodiment taken along line XXII-XXII shown in FIG. 24, FIG. 23 is a diagram showing a state in which the wrench switching unit shown in FIG. 22 is moved, and FIG. It is sectional drawing along the XXIV-XXIV line shown in FIG.

  In the seventh embodiment, members similar to those described in the fourth embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIGS. 22 to 24, the wrench 7 according to the seventh embodiment is different from the wrench 4 according to the fourth embodiment in that the structure of the switching portion 93 and the leaf spring 85 that biases the retainer 81 are provided. There is no point.

  The switching unit 93 includes a plate-shaped switching unit main body 94 having a substantially rectangular shape, and the inner peripheral surface 12 side of the switching unit main body 94, which is perpendicular to the center line O from the substantially central portion to the inner peripheral surface 12 side. An extended convex portion 95 is provided.

  As shown in FIG. 22, the convex portion 95 is located closer to the center line O on the arrow X direction side and the handle portion 13 side than the center line O when the switching portion 93 is moved in the arrow X direction. It extends to the wedge region 47B of the housing portion 45, and serves as a locking portion that prevents the lock member 44 from moving to the wedge region 47B. Further, as shown in FIG. 23, the convex portion 95 is closer to the center line O than the center line O on the arrow Y direction side and the handle portion 13 side when the switching portion 93 is moved in the arrow Y direction. It extends to the wedge region 47A of the accommodating portion 45 at the above position and serves as a locking portion that prevents the lock member 44 from moving to the wedge region 47A.

  The specific operation of the wrench 7 having this configuration is substantially the same as that of the wrench 4 according to the fourth embodiment, and will not be described in detail except for the different parts, but the fastening member 100 is rotated clockwise by using the wrench 7. When the switching portion 93 is pushed in the direction of the arrow X shown in FIG. 22, the convex portion 94 extends to the wedge region 47B, and the lock member 44 cannot be positioned in the wedge region 47B.

  From this state, the handle 13 is rotated counterclockwise (arrow CCW direction) to return the lock member 44 to the play area 46 so that the lock member 44 does not protrude from the inner peripheral surface 12 and the fastening member 100 is moved. Insert into the circular hole 30. Next, when the rotation of the handle portion 13 in the counterclockwise direction is released and the handle portion 13 is rotated in the clockwise direction, the lock member 44 holds the position due to inertia and relatively moves from the play area 46 to the wedge area 47A. To protrude from the inner peripheral surface 12. By this operation, the fastening member 100 is securely tightened evenly in the circumferential direction by the wedge effect of the inner peripheral surface 12 and the lock member 44, and rotates clockwise in a unitary manner with the holding portion 11 with almost no idle rotation. To do.

  When the rotation of the fastening member 100 is finished, if the handle 13 is rotated counterclockwise, the lock member 44 returns to the play area 46, and the space between the fastening member 100 and the inner peripheral surface 12 and the lock member 14 is reached. Thus, the wedge effect is not generated, and the rotation of the fastening member 100 is completed.

  On the other hand, when the fastening member 100 inserted into the circular hole 30 of the holding part 11 is to be rotated counterclockwise (arrow CCW direction), as shown in FIG. 23, the switching part 93 is pushed in the arrow Y direction, When the handle portion 13 is rotated in the counterclockwise direction, the fastening member 100 is securely tightened evenly in the circumferential direction by the wedge effect of the inner peripheral surface 12 and the lock member 44 in the same manner as described above, and the idling is almost impossible. Without rotating, it rotates integrally with the holding part 11 in the clockwise direction.

  In addition, in Example 7, since it was set as the structure which arrange | positioned the accommodating part 45 on both sides on both sides of the centerline O, the inner peripheral surface 12 side of the convex part 95 was made into planar shape, However, The play area 46 on the centerline O is used. In the case of the configuration in which is provided, the inner peripheral surface 12 side of the convex portion 95 can be configured as the notch 58 described in the second, third, fifth, and sixth embodiments.

FIG. 3 is a partial cross-sectional view of the wrench according to Example 1 of the present invention, taken along the line I-I shown in FIG. 2. FIG. 2 is a partial sectional view taken along line II-II shown in FIG. 1. FIG. 2 is a partially enlarged view of the wrench shown in FIG. 1, showing a state where a switching unit is moved to one side. FIG. 3 is a partially enlarged view of the wrench shown in FIG. 2, showing a state where a switching unit is moved to one side. It is a figure which shows the state which removed the lock member, the biasing member, and the switch part from the wrench shown in FIG. It is sectional drawing along the VI-VI line shown in FIG. 8 of the wrench concerning Example 2 of this invention. It is a figure which shows the state which moved the switching part of the wrench shown in FIG. It is sectional drawing along the VIII-VIII line shown in FIG. It is sectional drawing along the IX-IX line shown in FIG. 11 of the wrench concerning Example 3 of this invention. It is a figure which shows the state which moved the switching part of the wrench shown in FIG. It is sectional drawing along the XI-XI line shown in FIG. It is a top view of the wrench concerning Example 4 of this invention, Comprising: It is the figure which notched one part. It is sectional drawing along the XIII-XIII line | wire shown in FIG. It is a figure which shows the state which moved the switching part of the wrench shown in FIG. It is sectional drawing along the XV-XV line | wire shown in FIG. It is sectional drawing along the XVI-XVI line shown in FIG. 18 of the wrench concerning Example 5 of this invention. It is a figure which shows the state which moved the switching part of the wrench shown in FIG. It is sectional drawing along the XVIII-XVIII line shown in FIG. It is sectional drawing along the XIX-XIX line | wire shown in FIG. 21 of the wrench concerning Example 6 of this invention. It is a figure which shows the state which moved the switching part of the wrench shown in FIG. It is sectional drawing along the XXI-XXI line | wire shown in FIG. It is sectional drawing along the XXII-XXII line shown in FIG. 24 of the wrench concerning Example 7 of an actual invention. It is a figure which shows the state which moved the switching part of the wrench shown in FIG. It is sectional drawing along the XXIV-XXIV line shown in FIG.

Explanation of symbols

1, 2, 3, 4 Wrench 11 Holding portion 12 Inner peripheral surface 13 Handle portion 14, 44 Lock member 15, 45 Housing portion 16D, 16U, 46 Play area 17DA, 17DB, 17UA, 17UB, 47A, 47B Wedge area 18DA, 18DB, 18UA, 18UB Inclined part 19 Cylindrical pin 21D, 21U Ring 23A, 23B, 53, 73, 83, 93 Switching part 51 Cylindrical member 58 Notch 58A, 58B Locking part

Claims (5)

A wrench for rotating a member having a substantially cylindrical shape,
A holding portion having an inner peripheral surface capable of accommodating the outer periphery of the member;
A lock member that is held movably within a certain range in the circumferential direction of the inner peripheral surface;
A play area formed on the inner peripheral surface and capable of moving the lock member;
A wedge region that is formed on the inner peripheral surface and disposed on both sides in the circumferential direction across the play region, and that projects the lock member from the inner peripheral surface;
Switching means for switching the lock member to move to one of the wedge regions;
Urging means for urging the lock member from the play area to the wedge area;
The switching means is a wrench that switches the urging direction of the urging means so that the lock member moves to one of the wedge regions . The wrench according to claim 1, wherein the urging means is provided on both sides of the movement direction of the lock member, and the switching means switches so that any one of the urging means urges the lock member. A wrench for rotating a member having a substantially cylindrical shape,
A holding portion having an inner peripheral surface capable of accommodating the outer periphery of the member;
A lock member that is held movably within a certain range in the circumferential direction of the inner peripheral surface;
A play area formed on the inner peripheral surface and capable of moving the lock member;
A wedge region that is formed on the inner peripheral surface and disposed on both sides in the circumferential direction across the play region, and that projects the lock member from the inner peripheral surface;
Switching means for switching the lock member to move to any one of the wedge regions,
The locking member includes a hollow cylindrical member made of a cylindrical pin which is inserted into the hollow portion of the cylindrical member is movably held in the housing part play area and a wedge area formed by the cylindrical pin Relais Inch. A wrench for rotating a member having a substantially cylindrical shape,
A holding portion having an inner peripheral surface capable of accommodating the outer periphery of the member;
A lock member that is held movably within a certain range in the circumferential direction of the inner peripheral surface;
A play area formed on the inner peripheral surface and capable of moving the lock member;
A wedge region that is formed on the inner peripheral surface and disposed on both sides in the circumferential direction across the play region, and that projects the lock member from the inner peripheral surface;
Switching means for switching the lock member to move to any one of the wedge regions,
A plurality of receiving portions in which the play area and the wedge area are formed are formed along the entire inner peripheral surface, and a plurality of the lock members are held by the retainers disposed on the inner peripheral surface to movably disposed, Relais wrench member in the housing portion of each. The wrench according to claim 4 , wherein each of the lock members is urged by the urging means via the retainer.