JP2010158741A - Wrench and screwing member for the wrench - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an excellently useful wrench which rotates a first screwing member having a circular body or a second screwing member having a circular cavity, easily in a screwing or unscrewing direction, and also reduces limitation of a space. <P>SOLUTION: An annular out-fitting part 3 to be fitted over the circular body 7b of the first screwing member 7 is provided at one end of a wrench handle 2, and a cylindrical in-fitting part 5 to be fitted into the circular cavity 9b of the second screwing member 9 is provided at the other end of the wrench handle 2. A one-directional first clutch means 8 for tightly engaging with an outer peripheral surface of the circular body 7b to turn it in the R1 arrow direction in association with rotation in the screwing direction R1 arrow having the out-fitting part 3 fitted over the circular body 7b is provided on an inner peripheral surface of the out-fitting part 3. A one-directional second clutch means 10 for tightly engaging with an inner peripheral surface of the circular cavity 7b to turn it in the R1 arrow direction in association with rotation in the screwing direction R2 arrow having the in-fitting part 5 fitted into the circular cavity 7b, is provided on an outer peripheral surface of the in-fitting part 5. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a wrench and a wrench screw member, for example, can be externally fitted to a circular body portion of a bolt-like screw member to rotate the screw member in a screwing direction or a screw releasing direction. Further, the present invention relates to a wrench and a wrench screw member that can be externally or internally fitted to a screw member made of a ring body or a cylindrical body to rotate the screw member in a screwing direction or a screw releasing direction. .

  Conventionally, as a wrench used as a tool for rotating a screwing member such as a bolt or a nut in a screwing direction or a screwing releasing direction, an open end wrench having an open wrench head part or an annular wrench head part An eyeglass wrench or a box wrench with a wing is well known.

Japanese Utility Model Publication No. 06-18785 Japanese Utility Model Publication No. 06-37894

  The conventionally known wrench has been used as a screw member such as a bolt having a polygonal head (mainly hexagonal head) or a polygonal nut (mainly hexagonal nut). In other words, the bolt head and nut are usually hexagonal so that they can be rotated with a wrench, but depending on the application, the bolt head has a circular shape or a nut with a thick ring shape. May be convenient. However, the conventional wrench cannot be externally fitted to such a new screw or bolt or nut and can be rotated in the screwing direction or the screw releasing direction. Further, there is no wrench that fits in a circular hollow portion of a screw sleeve having a screw formed on the outer surface of a cylinder or rotates the screw sleeve in a screwing direction or a screw releasing direction.

  By the way, the operation | work which rotates screwing members, such as a volt | bolt which has a circular head, and a circular nut in a screwing direction or a screw release direction, can be performed using special wrench, such as a pipe wrench. However, this type of special wrench is required to be rotated with a large torque in the screwing direction or screwing release direction because the screwing member to be used is mainly a pipe. For this reason, the screw member holding jaw, the rod-shaped wrench handle, etc. are formed with a high strength and are large and heavy. Therefore, it is not only inferior to usability but also a screw member such as a bolt or a circular nut having a circular head arranged in a narrow position, or a bolt or a circular nut having a circular head arranged at a short relative distance, etc. It is not possible to rotate the plurality of screw members individually in the screwing direction or the screw releasing direction due to space constraints. Moreover, it is impossible to rotate a screwing member such as an external screw sleeve in which a screw is formed on the surface of the cylinder in the screwing direction or the screwing releasing direction.

  The present invention has been made in view of such circumstances, and an object of the present invention is to first screw a bolt having a circular head (circular body portion) or a circular nut (circular body portion). The second screwing member such as the member or the outer screw sleeve having the circular hollow portion can be easily rotated in the screwing direction or the screw releasing direction, and is excellent in usability in which space restrictions are eased. Another object of the present invention is to provide a wrench and a screw member for these wrench.

  In order to achieve the above object, a wrench according to the present invention includes an outer fitting portion fitted to the circular body portion of the first screwing member and an inner fitting fitted to the circular hollow portion of the second screwing member. The wrench handle is provided at at least one end of both ends of the wrench handle portion, and is fitted on the inner peripheral surface of the outer fitting portion on the circular body portion of the first screw member. The first screwing member is engaged with the outer peripheral surface of the circular body portion in accordance with the rotation of the first screwing member in the screwing direction or screwing releasing direction, and the first screwing member is screwed in or released. Unidirectional first clutch means for rotating in any one direction, and a second screwing member of the wrench handle part in a state of being fitted into a circular empty part of the second screwing member on the outer peripheral surface of the inner fitting part A second screw member that is engaged with the inner peripheral surface of the circular hollow portion in accordance with the rotation in either the screwing direction or the screw releasing direction. It is characterized by comprising a one-way second clutch means for rotating the one of screwing direction or screwing releasing direction, Te.

  According to this, the external fitting part of the wrench handle part is externally fitted to the circular body part of the first screwing member, and the wrench handle part is placed in either the screwing direction or the screwing releasing direction of the first screwing member. If it rotates, the outer peripheral surface of the circular body portion is fastened by the clutch action of the one-way first clutch means provided on the inner peripheral surface of the outer fitting portion, so that it follows the rotational direction of the wrench handle portion. The first screw member can be easily rotated in either the screwing direction or the screw releasing direction to fasten or release the first screw member. Further, when the wrench handle portion is rotated in the anti-screwing direction while the wrench handle portion is being rotated in the screwing direction of the first screwing member, the one-way first clutch means is idled, so that it functions as a ratchet wrench. When the wrench handle portion is rotated in the anti-screw release direction in the middle of the rotation of the first screw member in the screw release direction, the one-way first clutch means can be promoted. Since the wheel rotates idly, the function as a ratchet wrench can be exhibited and the fastening release work can be promoted. Furthermore, the difference between the inner diameter of the outer fitting portion set corresponding to the size (outer diameter) of each circular body portion of the first screwing member and the outer diameter of the outer fitting portion is minimized. Since the volume of the outer fitting portion is reduced, the screwing direction or screw release is not subject to space restrictions even if the first screwing members are arranged in a narrow position or arranged at a short relative distance. It becomes possible to rotate in the direction, improving usability.

  Further, the inner fitting portion of the wrench handle portion is fitted into the circular hollow portion of the second screw member, and the wrench handle portion is rotated in either the screwing direction or the screw release direction of the second screw member. For example, the inner peripheral surface of the circular hollow portion is fastened by the clutch action of the one-way second clutch means provided on the outer peripheral surface of the inner fitting portion, so that the second screw follows the rotating direction of the wrench handle portion. The second screwing member can be fastened or unfastened by easily rotating the wearing member in either the screwing direction or the screwing releasing direction. In addition, when the wrench handle is rotated in the anti-screwing direction while the wrench handle is being rotated in the screwing direction of the second screwing member, the one-way second clutch means rotates idle, so that it functions as a ratchet wrench When the wrench handle is rotated in the anti-screw release direction in the middle of rotating the wrench handle in the screw release direction, the one-way second clutch means Since the wheel rotates idly, the function as a ratchet wrench can be exhibited and the fastening release work can be promoted. Furthermore, the volume of the inner fitting portion is reduced by setting the size (outer diameter) of the inner fitting portion corresponding to the size (inner diameter) of each circular hollow portion of the second screwing member. 2 Even if the screwing members are arranged in a narrow position or arranged at a short relative distance, they can be rotated in the screwing direction or screwing release direction without being restricted by space. Improves.

  The one-way first clutch means is formed in at least one concave portion opened on an inner peripheral surface of a circular annular outer fitting portion, a rolling element arranged to roll in the concave portion, and a deep portion of the concave portion. Inclined cam surface inclined in a direction in which the rolling element is pressed and bonded to the outer peripheral surface of the circular body portion as the wrench handle portion rotates in either the first screwing member screwing direction or the screw releasing direction. And an elastic member that is disposed in the concave portion and urges the rolling element in a direction in which the rolling member is pressed against the outer peripheral surface of the inclined cam surface and the circular body portion.

  According to this, as the wrench handle portion rotates in either the first screwing member screwing direction or the screwing releasing direction, a cam action is generated on each inclined cam surface, and each rolling element is screwed to the first screwing member. Since it can press-fit on the outer peripheral surface of the circular body part of a member, a 1st screwing member can be easily and reliably rotated to either a screwing direction or a screwing releasing direction. Further, when the circular annular outer fitting portion is rotated in the anti-screwing direction while being rotated in the screwing direction of the first screwing member, the cam action of each inclined cam surface is released. The rotation in the attachment direction and the rotation in the opposite screwing direction can be repeated with a small rotation angle, and the fastening operation of the first screwing member can be promoted, and the circular annular outer fitting Since the cam action of each inclined cam surface is released when the part is turned in the anti-screw release direction in the middle of turning in the screw release direction of the first screw member, The rotation and the rotation in the anti-screwing release direction can be repeated at a small rotation angle, and the fastening release work of the first screwing member can be promoted. Furthermore, since the one-way first clutch means can be configured with a simple structure with a reduced number of parts, the productivity of the wrench provided with the one-way first clutch means is improved.

  The one-way second clutch means is formed in at least one concave portion opened on an outer peripheral surface of a cylindrical inner fitting portion, a rolling element that is freely rollable in the concave portion, and a deep portion of the concave portion. An inclined cam surface inclined in a direction in which the rolling element is pressed and bonded to the inner peripheral surface of the circular hollow portion as the wrench handle portion is rotated in either the second screwing direction or the screw release direction. And an elastic member that is disposed in the concave portion and biases the rolling element in a direction in which the rolling member is pressed and bonded to the inner circumferential surface of the inclined cam surface and the circular hollow portion.

According to this, with the rotation of the cylindrical inner fitting portion in either the second screwing member screwing direction or the screwing releasing direction, a cam action is generated on each inclined cam surface, and each rolling element is circular. Since it can be pressed and engaged with the inner peripheral surface of the empty portion, the second screwing member can be easily and reliably rotated in either the screwing direction or the screwing releasing direction. In addition, if the columnar inner fitting portion is rotated in the anti-screwing direction while being rotated in the screwing direction of the second screwing member, the cam action of each inclined cam surface is released. The rotation in the attachment direction and the rotation in the opposite screwing direction can be repeated with a small rotation angle, and the fastening operation of the second screwing member can be promoted, and the cylindrical inner fitting When the part is rotated in the anti-screw release direction while rotating in the screw release direction of the second screw member, the cam action of each inclined cam surface is released. The rotation and the rotation in the anti-screw release direction can be repeated with a small rotation angle, and the fastening release work of the second screw member can be promoted. Furthermore, since the one-way second clutch means can be configured with a simple structure with a reduced number of parts, the productivity of the wrench including the one-way first clutch means is improved.
Furthermore, in the wrench according to the present invention, at least one of a pair of left and right outer fitting parts or inner fitting parts in which the screwing direction or screwing release direction of the screwing member is opposite is arranged at the end of the wrench handle part. Has been. According to this, one of the left and right outer fitting portions can be used for screwing, and the other can be used for anti-screwing. The same applies to the left and right inner fitting portions.

  According to the wrench of the present invention, the first screw member such as a bolt having a circular head (circular member) or a circular nut (circular member) or the second screw such as an external screw sleeve having a circular hollow portion. The member can be easily rotated in the screwing direction or the screwing releasing direction, and can function as a ratchet wrench to perform the fastening operation or the fastening releasing operation of the first screwing member and the second screwing member. Not only can it be promoted, but space constraints are eased, improving usability.

It is a whole perspective view of a 1st embodiment which omits and shows a part of a rod-like wrench handle part. It is the enlarged view which looked at the circular annular external fitting part of the 1st wrench head part from the arrow A direction of FIG. It is sectional drawing which expands and shows a part of relationship between the circular annular outer fitting part and circular body part at the time of the 1st screwing member fastening. It is the enlarged view which looked at the cylindrical internal fitting part of the 2nd wrench head part from the arrow B direction of FIG. It is sectional drawing which expands and shows a part of relationship between the column-shaped internal fitting part at the time of a 2nd screwing member fastening, and a circular empty part. It is sectional drawing which expands and shows a part of relationship between the circular annular outer fitting part and circular body part at the time of 1st screwing member fastening cancellation | release. It is sectional drawing which expands and shows a part of relationship between a cylindrical internal fitting part at the time of the 2nd screwing member fastening cancellation | release, and a circular empty part. It is a whole perspective view of a 3rd embodiment which omits and shows a part of a rod-like wrench handle part.

Hereinafter, preferred embodiments of a wrench according to the present invention will be described with reference to the drawings.
1 to 5 show a first embodiment of the present invention, and FIG. 1 is an overall perspective view of a wrench and a wrench screwing member shown with a part of a rod-like wrench handle portion omitted. Fig. 3 is an enlarged view of the circular annular outer fitting portion of the first wrench head portion viewed from the direction of arrow A in Fig. 1, and Fig. 3 is an illustration of the circular annular outer fitting portion and the first screw when the first screw member is fastened. Sectional drawing which expands and shows a part of relationship with the circular body part of a wearing member, FIG. 4 is an enlarged view of a cylindrical inner fitting part of the second wrench head part from the direction of arrow B in FIG. FIG. 5 is an enlarged cross-sectional view showing a part of the relationship between the cylindrical inner fitting portion and the circular hollow portion of the second screwing member when the second screwing member is fastened.

  1 to 3, the wrench 1 is made of high carbon steel or malleable cast iron, and a rod-shaped wrench handle portion 2 is provided with a circular annular outer fitting portion 3 on a first wrench head portion 4 at one end portion thereof. The second wrench head portion 6 at the other end of the wrench handle portion 2 is provided with a short cylindrical inner fitting portion 5. A right-hand threaded portion 7a and a circular head portion 7b (referred to as a circular body portion 7b in the following description) for fastening a screwed member (not shown) are provided on the inner peripheral surface of the circular annular outer fitting portion 3. One-way first clutch means 8 is provided for rotating a first screwing member 7 made of a bolt having a screwing direction (arrow R1). Further, as shown in FIGS. 1, 4 and 5, the outer peripheral surface of the short cylindrical inner fitting portion 5 has a right screw portion 9a for screwing into a screwed member (not shown) and a circular hollow portion. And a one-way second clutch means 10 for rotating the second screwing member 9 made of an external screw sleeve having the screw 9b in the screwing direction (arrow R2).

In FIG. 1 to FIG. 3, the one-way first clutch means 8 has three concave portions 8 a that are opened on the inner peripheral surface of the circular annular outer fitting portion 3 and separated at equal intervals in the circumferential direction, A rolling element 8b made of a roller disposed so as to be able to roll in each recess 8a, an inclined cam surface 8c extending in the circumferential direction formed at the back of each recess 8a, and an elastic member 8d made of a spring. I have. In this embodiment, the first clutch means 8 is arranged at three locations in the circumferential direction of the circular annular outer fitting portion 3, but it is sufficient to provide at least one location.
The concave portion 8a is formed in a groove shape in the width direction of the inner peripheral surface portion of the circular annular outer fitting portion 3 (the direction connecting both openings of the outer fitting portion 3 in the shortest direction). As shown in FIG. 3, the groove-like recess 8a has a substantially trapezoidal cross section, and the depth of the groove is deeper on the front end side of the first screwing member 7 of the recess 8a (arrow R1), The rear end side is formed shallow. The depth dimension of the groove on the front end side is larger than the diameter of the rolling element 8b, and the rear end side is smaller than the diameter of the rolling element 8b. Therefore, the rolling element 8b is completely accommodated in the recess 8a on the front end side of the groove, and slightly protrudes from the inner peripheral surface of the outer fitting portion 3 on the rear end side.
The inclined cam surface 8c corresponds to the bottom surface of the recess 8a, and each rolling element 8b is turned into a circular body part as the wrench handle part 2 is rotated in the screwing direction (arrow R1) of the first screwing member 7. It inclines in the direction pressed and adhered to the outer peripheral surface of 7b. In other words, the inclined cam surface 8c is inclined backward and downward from the front end of the first screw member 7 in the screwing direction (arrow R1) to the rear end of the arrow. Each elastic member 8d urges each rolling element 8b in a direction opposite to the screwing direction (arrow R1).
The rolling element 8b is a cylindrical rod having a length substantially the same as the length of the groove, and includes shaft portions that pivotally support the circular annular outer fitting portion 3 at both ends. The rolling element 8b can swing between the screwing direction (arrow R1) and the screwing releasing direction (arrow R1 ') of the first screwing member 7, but is normally screwed off by the elastic member 8d. It is biased in the direction (arrow R1 ′).
The elastic member 8d uses a coil spring. The elastic members 8d are disposed at both ends of the rolling element 8b and urge the rolling elements 8b evenly in the screwing release direction (arrow R1 '). The elastic member 8d uses a coil spring, but other types of springs such as a leaf spring or a bamboo shoot spring may be used. In addition, the rolling element 8b is not limited to be biased in the pushing direction, but may be biased in the pulling direction.
The first screwing member 7 is composed of a circular body portion 7b that constitutes the head portion, and a columnar right-hand thread portion 7a that extends from the circular body portion 7b and has a screw formed on the outer peripheral surface thereof. It is a bolt-like form. The circular body portion 7b is limited to a circular body as shown in the figure, but the screw portion 7a may be conical. Further, the first screw member 7 may be a circular nut having a thick ring body and a screw formed on the inner peripheral surface.

1, 4, and 5, the one-way second clutch means 10 has three recesses 10 a that are opened on the outer peripheral surface of the cylindrical inner fitting portion 5 and separated at equal intervals in the circumferential direction. A rolling element 10b made of a roller that is movably disposed in each of the recesses 10a, an inclined cam surface 10c that is formed at the back of each recess 10a and extends in the circumferential direction, and an elastic member 10d made of a spring. And. In this embodiment, the second clutch means 10 is arranged at three locations on the outer peripheral surface of the cylindrical inner fitting portion 5, but it is sufficient to provide at least one location.
The concave portion 10a is formed in a groove shape in the width direction of the outer peripheral surface portion of the cylindrical inner fitting portion 5 (direction in which both end edges of the inner fitting portion 5 are connected in the shortest direction). As shown in FIG. 5, the groove depth of the groove-like recess 10a is deeper toward the front end side in the screwing direction (arrow R2) of the second screwing member 9 of the recess 10a, and goes to the rear end side. It is formed shallowly. The depth dimension of the groove on the front end side is larger than the diameter of the rolling element 10b, and the rear end side is smaller than the diameter of the rolling element 10b. Therefore, the rolling element 10b is completely contained in the recess 10a on the front end side of the groove, and slightly protrudes from the outer peripheral surface of the inner fitting portion 5 on the rear end side.
The inclined cam surface 10c corresponds to the bottom surface of the concave portion 10a, and each rolling element 10b is formed into a circular hollow portion as the wrench handle portion 2 is rotated in the screwing direction (arrow R2) of the second screwing member 9. It inclines in the direction which press-fits to the internal peripheral surface of 9b. That is, the inclined cam surface 10c is inclined rearwardly downward from the arrow front end to the arrow rear end in the screwing direction (arrow R2) of the second screwing member 9. Each elastic member 10d urges each rolling element 10b in the direction opposite to the screwing direction (arrow R2).
The rolling element 10b is a cylindrical rod body having a length substantially the same as the length of the groove of the recess 10a, and includes shaft portions that are pivotally supported by the cylindrical inner fitting portions 5 at both ends. The rolling element 10b can swing between the screwing direction (arrow R2) and the screwing releasing direction (arrow R2 ') of the second screwing member 9, but is normally unscrewed by the elastic member 10d. It is biased in the direction (arrow R2 ′).
The elastic member 10d uses a coil spring similarly to the elastic member 8d of the first wrench head portion. This elastic member 10d is also disposed at both ends of the rolling element 10b and urges the rolling element 10b evenly in the screwing release direction (arrow R2 ′). The elastic member 10d uses a coil spring, but other types of springs such as a leaf spring and a bamboo spring may be used. Moreover, not only what urges | biases the rolling element 10b in the direction to push, but you may urge in the pulling direction.
The second screwing member 9 has a thread formed on the outer peripheral surface of a thick ring body, or an external screw having a right screw portion 9a and a circular hollow portion 9b on the outer peripheral surface of the cylinder as shown in FIG. It may be a sleeve. Moreover, the circular recessed part in which the inner fitting part 5 fits in the edge part of the circular body part 7b of the said bolt-shaped 1st screwing member 7 may be formed.

  According to the wrench 1 of the first embodiment configured as described above, the circular annular outer fitting portion 3 is fitted on the circular body portion 7b of the first screwing member 7, and the wrench handle portion 2 is first screwed. If the member 7 is rotated in the screwing direction (arrow R1), the outer peripheral surface of the circular body portion 7b is moved by the clutch action of the one-way first clutch means 8 provided on the inner peripheral surface of the circular annular outer fitting portion 3. Since they are fastened together, the first screwing member 7 can be easily rotated in the screwing direction following the rotation direction of the wrench handle portion 2 to fasten the screwed member (not shown). . Further, when the wrench handle portion 2 is rotated in the anti-screwing direction (arrow R1 ′ in FIG. 3) during the rotation of the first screwing member 7 in the screwing direction (arrow R1), the first direction is the first. Since the clutch means 8 idles, the function as a ratchet wrench can be exerted to facilitate the fastening operation, and corresponding to the size (outer diameter) of each circular body portion 7a of the first screw member 7 By suppressing the difference between the inner diameter of the circular annular outer fitting portion 3 and the outer diameter of the circular annular outer fitting portion 3 to the minimum necessary, the volume of the circular annular outer fitting portion 3 is reduced. Even if the first screwing member 7 is arranged in a narrow position or arranged at a short relative distance, it can be rotated in the screwing direction (arrow R1) without being restricted by space, Usability is improved.

  On the other hand, the cylindrical inner fitting portion 5 is fitted into the circular hollow portion 9b of the second screwing member 9, and the wrench handle portion 2 is rotated in the screwing direction (arrow R2) of the second screwing member 9. For example, since the inner peripheral surface of the circular hollow portion 9b is engaged by the clutch action of the one-way second clutch means 10 provided on the outer peripheral surface of the cylindrical inner fitting portion 5, the rotation direction of the wrench handle portion 2 is Following this, the second screwing member 9 can be easily rotated in the screwing direction to screw the second screwing member 9 into a screwed member not shown. Further, when the wrench handle portion 2 is rotated in the anti-screwing direction (arrow R2 ′ in FIG. 5) while the second screwing member 9 is being rotated in the screwing direction (arrow R1), the unidirectional second Since the clutch means 10 idles, the function as a ratchet wrench can be exerted to facilitate the fastening operation, and a circle corresponding to each size (inner diameter) of the circular empty portion 9b of the second screwing member 9 can be obtained. By setting the size (outer diameter) of the columnar inner fitting portion 5, the volume of the columnar inner fitting portion 5 is reduced, so that the second screwing member is disposed at a narrow position or has a short relative length. Even if they are arranged at a distance, they can be rotated in the screwing direction (arrow R2) without being restricted in space, and usability is improved.

  6 and 7 show a second embodiment of the present invention. FIG. 6 is an enlarged view of a part of the relationship between the circular annular outer fitting portion and the circular body portion when the first screwing member is released. FIG. 7 is an enlarged cross-sectional view showing a part of the relationship between the cylindrical inner fitting portion and the circular hollow portion when the second screwing member fastening is released. In the second embodiment shown in FIGS. 6 and 7, the same parts as those in the first embodiment described with reference to FIGS.

  In FIG. 6, the first screwing member 7 formed of a bolt having a right screw part 7a and a circular body part 7b fastening a screwed member (not shown) is rotated in the screwing releasing direction (arrow R3). A one-way first clutch means 8 is shown. In FIG. 7, a second threaded sleeve comprising a right-hand threaded portion 9a and a circular hollow portion 9b screwed into a member to be screwed (not shown). A one-way second clutch means 10 for rotating the screwing member 9 in the screwing releasing direction (arrow R4) is shown.

  The structural differences between the first embodiment described with reference to FIGS. 1 to 5 and the second embodiment shown in FIGS. 6 and 7 are that the inclined cam surface 8c of the one-way first clutch means 8 is inclined and the rolling direction. The arrangement direction of the moving body 8b and the elastic member 8d is set to be opposite to each other, and the inclination direction of the inclined cam surface 10c in the one-way second clutch means 10 and the arrangement direction of the rolling element 10b and the elastic member 10d are opposite to each other. It is set to.

  According to the wrench 1 of the second embodiment shown in FIG. 6, the circular annular outer fitting portion 3 is fitted on the circular body portion 7 b of the first screwing member 7, and the wrench handle portion 2 is attached to the first screwing member. 7 in the screw release direction (arrow R3), the outer peripheral surface of the circular body portion 7b is moved by the clutch action of the one-way first clutch means 8 provided on the inner peripheral surface of the circular annular outer fitting portion 3. Since it is fastened, the first screwing member 7 is easily rotated in the screwing releasing direction following the rotating direction of the wrench handle part 2 to release the fastening of the screwed member (not shown). be able to. Further, when the wrench handle portion 2 is rotated in the anti-screw release direction (arrow R3 ′ in FIG. 8) during the rotation of the first screw member 7 in the screw release direction (arrow R3), the direction is one direction. Since the first clutch means 8 idles, the function as a ratchet wrench can be exhibited to facilitate the fastening release work, and the size (outer diameter) of the circular body portion 7a of the first screw member 7 can be increased. The volume of the circular annular outer fitting portion 3 is reduced by minimizing the difference between the inner diameter of the circular annular outer fitting portion 3 and the outer diameter of the circular annular outer fitting portion 3 set correspondingly. Therefore, even if the first screwing members 7 are arranged in a narrow position or arranged at a short relative distance, they can be rotated in the screwing releasing direction (arrow R3) without being restricted by space. It becomes possible and the usability is improved.

  On the other hand, the cylindrical inner fitting portion 5 is fitted into the circular hollow portion 9b of the second screwing member 9, and the wrench handle portion 2 is rotated in the screwing releasing direction (arrow R4) of the second screwing member 9. Then, the inner peripheral surface of the circular hollow portion 9b is engaged by the clutch action of the one-way second clutch means 10 provided on the outer peripheral surface of the cylindrical inner fitting portion 5, so that the rotation of the wrench handle portion 2 is performed. Following the direction, the second screw member 9 can be easily rotated in the screw release direction to release the fastening of the screwed member (not shown) by the second screw member 9. Further, when the wrench handle portion 2 is rotated in the anti-screw release direction (arrow R4 ′ in FIG. 10) during the rotation of the second screw member 9 in the screw release direction (arrow R4), the direction is one direction. Since the second clutch means 10 idles, the function as a ratchet wrench can be exerted to facilitate the fastening operation, and the size (inner diameter) of each circular hollow portion 9b of the second screw member 9 can be accommodated. By setting the size (outer diameter) of the cylindrical inner fitting portion 5, the volume of the cylindrical inner fitting portion 5 is reduced, so that the second screwing member is arranged at a narrow position. Even if they are arranged at a short relative distance, they can be rotated in the screwing release direction (arrow R4) without being restricted in space, and the usability is improved.

  According to the wrench 1 of the first embodiment, the circular annular outer fitting portion 3 is fitted on the circular body portion 7b of the first screwing member 7, and the first screwing member 7 is screwed in the screwing direction ( It is rotated in the direction of arrow R1), the cylindrical inner fitting portion 5 is fitted in the circular hollow portion 9b of the second screwing member 9, and the second screwing member 9 is rotated in the screwing direction (arrow R2). However, as shown in the illustrated example, if the circular annular outer fitting portion 3 penetrates, the direction of the circular annular outer fitting portion 3 with respect to the circular body portion 7b is reversed. By externally fitting the circular body portion 7b, the first screwing member 7 can be rotated in the screwing releasing direction (arrow R3) in the same manner as the wrench 1 described in the second embodiment. In addition, if the circular annular outer fitting portion 3 of the second embodiment is configured to penetrate as in the illustrated example, the direction of the circular annular outer fitting portion 3 with respect to the circular body portion 7b is reversed and the circular body is reversed. By externally fitting the portion 7b, the first screwing member 7 can be rotated in the screwing direction (arrow R1) in the same manner as the wrench 1 described in the first embodiment.

  In the first embodiment, a circular annular outer fitting portion 3 for fastening the first screwing member 7 is provided at one end portion of the wrench handle portion 2, and a second screwing member is provided at the other end portion of the wrench handle portion 2. 9 is provided with an inner fitting portion 5 for fastening, and in the second embodiment, a circular annular outer fitting portion 3 for releasing fastening of the first screwing member 7 is provided at one end portion of the wrench handle portion 2, and the wrench handle portion 2 Although the second fitting member 9 is provided with the inner fitting portion 5 for releasing the fastening at the other end portion, the first screwing member 7 is fastened or released only at one end portion of the wrench handle portion 2. Even if it is the wrench 1 of the structure which provided the circular annular external fitting part 3 for the inside, or the internal fitting part 5 for the fastening of the 2nd screwing member 7 or the fastening cancellation | release at only one end part of the wrench handle part 2 A wrench 1 having a configuration provided with

  Further, a circular annular outer fitting portion 3 for fastening the first screwing member 7 is provided at one end portion of the wrench handle portion 2, and a circular shape for releasing the first screwing member 7 is attached to the other end portion of the wrench handle portion 2. A configuration in which the annular outer fitting portion 3 is provided, or a circular annular inner fitting portion 5 for fastening the second screwing member 7 is provided at one end portion of the wrench handle portion 2, and the second end portion of the wrench handle portion 2 is The structure which provided the internal fitting part 5 for the 2 screwing member 7 engagement cancellation | release may be sufficient. Furthermore, the outer fitting part 3 from which size differs in the one end part and other end part of the wrench handle part 2 may be provided. Moreover, you may provide the internal fitting part 5 from which a size differs in an end part and an other end part.

  FIG. 8 is a perspective view showing a third embodiment of the present invention. In the third embodiment, the same members as those in the first and second embodiments are denoted by the same reference numerals in the drawings, and the details are omitted. In the third embodiment, circular and annular outer fitting portions 3 and 3 ′ and cylindrical inner fitting portions 5 and 5 ′ are arranged on the left and right with the end portion of the wrench handle portion 2 as the center. The pair of left and right outer fitting portions 3 and 3 ′ are formed with inclined cam surfaces 8c and 8c ′ having opposite inclinations in the recesses 8a and 8a ′, respectively, and two independent rolling elements 8b and 8b ′ are inclined cam surfaces. 8c and 8c ′ are arranged so as to be swingable. Furthermore, the pair of left and right inner fitting parts 5 and 5 ′ are formed with inclined cam surfaces 10c and 10c ′ having opposite inclinations in the recesses 10a and 10a ′, respectively, and two independent rolling elements 10b and 10b ′ are inclined. The cam surfaces 10c and 10c ′ are swingably arranged.

  In the third embodiment, the circular annular outer fitting portions 3 and 3 ′ and the cylindrical inner fitting portions 5 and 5 ′ are arranged on the left and right with the wrench handle portion 2 as the center. The left and right ones can be used for screwing and the other can be used for anti-screwing by the outer fitting parts 3, 3 'and the inner fitting parts 5, 5'.

  In the third embodiment, the outer fitting portions 3 and 3 ′ are provided at one end of the wrench handle portion 2 and the inner fitting portions 5 and 5 ′ are provided at the other end portion. Only the outer fitting portions 3, 3 ′ or the inner fitting portions 5, 5 ′ may be provided, and nothing may be provided at the other end portion. Further, outer fitting parts 3, 3 'or inner fitting parts 5, 5' of the same type and different sizes may be provided at both ends of the wrench handle part 2. Furthermore, a combination of the outer fitting part 3, 3 ′ or the inner fitting part 5, 5 ′ and the first or second embodiment may be used.

INDUSTRIAL APPLICABILITY The wrench and the wrench screw member according to the present invention can provide a new wrench as a tool or a new bolt or nut screw member, which is industrially useful.

DESCRIPTION OF SYMBOLS 1 Wrench 2 Wrench handle part 3 Circular and annular outer fitting part 4 First wrench head part 5 Columnar inner fitting part 6 Second wrench head part 7 First screwing member 8 One-way first clutch means 8a Recessed part 8b Rolling element 8c Inclined cam surface 8d Elastic member 9 First screwing member 10 One-way second clutch means 10a Recess 10b Rolling element 10c Inclined cam surface 10d Elastic member

Claims (6)

At least one of the outer fitting part fitted into the circular body part of the first screwing member and the inner fitting part fitted into the circular hollow part of the second screwing member is provided at both ends of the wrench handle part. Provided on at least one end,
Along with the rotation of the wrench handle portion in either the first screwing member screwing direction or the screwing releasing direction in a state of being fitted on the circular body portion of the first screwing member on the inner peripheral surface of the outer fitting portion. A one-way first clutch means that is engaged with the outer peripheral surface of the circular body portion and rotates the first screwing member in either the screwing direction or the screwing releasing direction;
Along with the rotation of the wrench handle portion in either the second screwing member screwing direction or the screwing releasing direction with the inner fitting portion outer peripheral surface being fitted in the circular hollow portion of the second screwing member. And a one-way second clutch means for engaging the inner peripheral surface of the circular hollow portion and rotating the second screwing member in either the screwing direction or the screwing releasing direction,
A wrench characterized by   The one-way first clutch means is formed in at least one concave portion opened on an inner peripheral surface of a circular annular outer fitting portion, a rolling element arranged to roll in the concave portion, and a deep portion of the concave portion. Inclined cam surface inclined in a direction in which the rolling element is pressed and bonded to the outer peripheral surface of the circular body portion as the wrench handle portion rotates in either the first screwing member screwing direction or the screw releasing direction. A wrench according to claim 1, further comprising: an elastic member that is disposed in the recess and urges the rolling element in a direction in which the rolling member is pressed against the outer peripheral surface of the inclined cam surface and the circular body portion.   The one-way second clutch means is formed in at least one concave portion opened on an outer peripheral surface of a cylindrical inner fitting portion, a rolling element that is freely rollable in the concave portion, and a deep portion of the concave portion. An inclined cam surface inclined in a direction in which the rolling element is pressed and bonded to the inner peripheral surface of the circular hollow portion as the wrench handle portion is rotated in either the second screwing direction or the screw release direction. A wrench according to claim 1, further comprising: an elastic member that is disposed in the concave portion and biases the rolling element in a direction in which the rolling member is pressed and bonded to the inclined cam surface and the inner peripheral surface of the circular hollow portion. 2. The at least one of a pair of right and left outer fitting parts or inner fitting parts in which the screwing direction or screwing release direction of the screwing member is opposite to each other is arranged at the end of the wrench handle part. wrench. The screw member for a wrench according to claim 1, comprising a circular body portion constituting the head and a cylindrical screw portion extending from the circular body portion and having a screw formed on an outer peripheral surface thereof. The screw member for a wrench according to claim 1, wherein a screw is formed on either the outer peripheral surface or the inner peripheral surface of the circular nut or the cylindrical body.

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