JP6629166B2 - Fastening device - Google Patents

Description

  The present invention relates to a fastening device for fastening while clamping an object to be fastened between one fastening member and another fastening member, and in particular, a fastening device for fastening the object to be fastened while rotating the one or other fastening member. It is about.

  BACKGROUND ART A fastening device is widely used for fastening a predetermined workpiece with a head of a bolt and a nut, such as a bolt as one fastening member and a nut as another fastening member. That is, if a fastening device consisting of the bolt and the nut is described as an example, one screw threaded on the outer periphery of the shaft portion of the bolt, the other screw threaded on the inner peripheral surface of the nut will be described. The object to be fastened is fastened by the fastening surface formed on the nut and the fastening surface formed on the bolt by screwing onto the screw and screwing the nut or the bolt.

  However, when fastening an object to be fastened by such a fastening device, the tightening force (torque) becomes excessive, and the screw thread is crushed or the one or other fastening member itself is deformed. When an excessive force acts on the workpiece, the workpiece may be abnormal.

  Therefore, conventionally, a function (torque limit function) for preventing an excessive torque from being applied to such a fastening device is provided, and when a certain torque is applied, the one or other fastening member is further extended. There has been proposed a configuration in which rotation operation cannot be performed (see Patent Documents 1, 2, 3, and 4). In these fastening devices, a shaft member such as a shaft on which one screw is threaded, and another screw threaded on one screw formed on the shaft member are threaded and one engagement is formed. Member, a moving member having the other engaging portion that engages with one engaging portion formed on the fastening member, a spring for pressing the moving member in the direction of the fastening member, and the like. When a predetermined torque is applied to the fastening member, the moving member is opposed to the fastening member side against the pressing force (elastic force) of the pressing member. It is configured to move in the opposite direction and release the engagement between the one engaging portion and the other engaging portion that have been engaged with each other until then. Therefore, even if the moving member is rotated by operating the moving member, the engagement between the one engaging portion and the other engaging portion is released, so the moving member idles, Consequently, no excessive torque acts on the fastening member.

Japanese Utility Model Laid-Open No. 6-43222 Japanese Utility Model Publication No. 7-10537 JP-A-10-47326 JP 2005-226789 A

  However, in the technology disclosed in each of the above-mentioned patent documents, the arrangement position of one of the engagement portions formed on the fastening member and the arrangement position of the other engagement portion formed on the moving member are different from each other. The arrangement position of the pressing member (spring) that presses the moving member in the direction of the fastening member and the length direction of the pressing member are all on the extension line in the axial direction of the shaft member. Have been.

  Therefore, in the technology disclosed in each of the above-mentioned patent documents, as a result of the entire fastening device being extended in the axial direction of the shaft member, there is a possibility that an external force may inadvertently act on the shaft. Has an adverse effect such as deformation.

  Therefore, the present invention has been proposed in order to solve the problems of the above-described conventional fastening device having a torque limit function, and prevents breakage of a fastening member or an object to be fastened due to excessive rotation torque. It is an object of the present invention to provide a novel fastening device that has a torque limiting function so that the shaft member is not greatly extended in the length direction of the shaft member.

The present invention has been proposed to solve the above problem, and a first invention (an invention according to claim 1) has one fastening member fixed or screwed to one end side. A shaft on which the other fastening member is screwed or fixed to the other end, a cover portion that covers at least a part of the outer periphery of one of the one fastening member or the other fastening member, and the cover comprising a handle made and a rotation operating part having a tip-covered one or the other direction oblique than the radial or該径direction of the fastening member by parts, the, one covered by the cover portion, or On the outer peripheral surface of the other fastening member, a plurality of engagement recesses are formed at regular intervals in the circumferential direction of one or the other fastening member covered by the cover portion . When the tip engages with the engagement recess, Moni, when the rotational torque transmitted to the one or the other of the fastening member is covered by the cover portion has reached a predetermined rotational torque, Re et al is moved in a direction away from the engagement recess the engaging A plate-shaped engagement member is provided for releasing the engagement with the recess, and the engagement recess engaged by the engagement member has a length in the same direction as the length direction of the shaft. The handle is slidable over a predetermined sliding range in the longitudinal direction of the shaft, and is covered by the cover at a position within the sliding range. The one or other fastening member can be rotated .

The fastening device according to the first aspect of the invention has a shaft in which one fastening member is fixed or screwed to one end and the other fastening member is screwed or fixed to the other end. It is a component. That is, one of the fastening members disposed on one end side of the shaft may be fixed to the shaft or screwed thereto, and the other fastening member disposed on the other end side of the shaft. May be fixed or screwed to the shaft. In any case, the engaged object is jointly fastened by the one fastening member and the other fastening member. Further, in the present invention, a handle is provided, and the handle includes a cover portion that covers at least a part of the outer circumference of the one fastening member or the other fastening member, and a radial direction of the one or other fastening member or And a rotary operation unit having a tip in a direction inclined from the radial direction. That is, the fastening device according to the present invention is a steering device-integrated fastening device. The cover portion covers at least a part of the outer periphery of the one fastening member or the other fastening member. Therefore, the cover portion may not only cover the entire outer periphery of the one fastening member or the other fastening member, but may also have a slit or an opening . Also further, in this invention, the outer peripheral surface of one or other of the fastening member is covered by the cover portion, arranged at regular intervals a plurality of engagement recesses in the circumferential direction of the respective said one or the other of the fastening member In the rotation operation portion, the tip engages with the engagement recess, and the rotation torque transmitted to one or the other fastening member covered by the cover reaches a predetermined rotation torque. when is moved in a direction away from the engagement groove, the engagement member is caused to release the engagement between the engaging groove is disposed. It said engagement recess, Ru sites der the tips of at least the engaging member engages. In the first invention, the engagement concave portion with which the engagement member engages is an engagement groove having a length in the same direction as the length direction of the shaft, and the handle is , Is slidable in a longitudinal direction of the shaft over a predetermined sliding range, and the one or other fastening member covered by the cover portion can be rotated at a position within the sliding range. ing. Then, the engagement member when the torque to be transmitted to one or other of the fastening member is covered by the cover portion has reached a predetermined rotational torque is slid allowed in a direction away from the engaging recesses . The sliding direction is a length direction (axial direction) of the shaft, and the handle slides independently of the one or other fastening member covered by the cover. In this way, even if the handle is slid, the one or other fastening member covered by the cover portion can be rotated by rotating the handle. In other words, in the first aspect of the present invention, by sliding the handle, the handle can be separated from the workpiece or the like, or the separated handle can approach the workpiece or the like. .

Therefore, according to the fastening device according to the first invention, even when the rotational torque transmitted to the one or the other of the fastening member is covered by the cover acts excessively, covered by the cover portion and one or with the other it is possible to effectively prevent the breakage of the fastening member and threads formed on the shaft, effectively prevent the breakage of the fastened object to be fastened by the fastening member and the other fastening member while the said can do. In particular, in the fastening device according to the first invention, the rotational torque transmitted to one or the other fastening member is different from that of the conventional fastening device, and is different from the outer circumference of the one or the other fastening member covered by the cover portion. The power is transmitted by an engaging recess (engaging groove) formed on the surface and an engaging member having a length in the radial direction of the shaft, and the engaging member constitutes a handle or one or the other. The fastening device is arranged in the rotation operating portion having a tip in the radial direction of the fastening member or in a direction inclined from the radial direction, and is not arranged in the longitudinal direction of the shaft. Therefore, there is no possibility that an external force acts on the shaft carelessly, and thus there is no adverse effect such as deformation of the shaft or the member to be fastened. According to the fastening device of the first invention, the shape of the object to be fastened by the one fastening member and the other fastening member covered by the cover portion and the situation around the fastening member In some cases, the object to be fastened or another obstacle exists in the middle of the rotation trajectory of the handle to be rotated, and the handle collides with the obstacle, and the handle cannot be rotated continuously over 360 degrees. Even so, by sliding the handle, it is possible to avoid collision with the obstacle and securely fasten the object to be fastened.

  The shaft, one and the other fastening members, and the handle constituting the present invention are not only made of a metal such as iron, stainless steel, aluminum or an alloy thereof, but also made of a hard resin. May be.

Further, in the second invention (the invention according to claim 2), in the first invention, the outer periphery of one or the other fastening member covered by the cover portion is provided within a sliding range of the handle. An endless concave portion having a width shorter than the length of the slide range is formed in a circumferential direction of one or the other fastening member covered by the cover portion, and a tip of the engaging member is provided with the engaging member. An engaging portion is formed which engages with the mating groove and is formed to have a width shorter than the width of the endless recess, and the handle is slid within the sliding range so that the engaging portion is located within the endless recess. It is characterized by being made movable .

In the fastening device according to the second invention, an endless recess (a recess formed in a ring shape or an annular shape) is formed on the outer periphery of the one or other fastening member covered by the cover portion. The position where the endless recess is formed is within the sliding range of the handle. On the other hand, in the second aspect of the present invention, an engaging portion having a width shorter than the width of the endless concave portion is formed at the tip of the engaging member. Therefore, for example, when the endless recess is formed at the end of one or the other fastening member covered by the cover, the handle is slid in the longitudinal direction of the shaft, and When the engaging portion formed at the front end of the joining member reaches the position where the endless concave portion is formed, the handle is engaged with the engaging groove regardless of whether the handle is rotated in the normal rotation direction or the reverse rotation direction. The engaging portion does not engage with each other (the rotational force does not act on one or the other fastening member covered by the cover portion), and the handle idles. Then, when the handle is further slid in the reverse direction, the engagement portion formed at the tip of the engagement member engages with the engagement groove, and the one or other fastening member covered by the cover is rotated. be able to. In addition, the formation position of the above-mentioned endless concave portion may be formed at any position as long as it is within the sliding range of the handle, and the number may be plural.

Further, according to a third invention (an invention according to claim 3), in the second invention, a cap is attached to one end or the other end of the shaft, and a tip of the engaging member is provided in the cap. A return elastic member for urging the handle toward the other end or one end of the shaft so as to always return to a position where the handle is engaged with the engagement groove.

In the fastening device according to the third aspect of the invention, the handle is always moved to the other end or one end of the shaft by the return elastic member housed in the cap, that is, before the handle is slid as described above. Is biased to the state. Therefore, in the fastening device according to the third aspect, the handle slides against the elastic force of the return elastic member. That is, when an object to be fastened or another obstacle is present in the middle of the rotation locus of the handle, the operator slides the handle against the elastic force of the return elastic member to adjust the position thereof. By changing the position, the handle (and one or the other fastening member covered by the cover portion) can be rotated while avoiding the collision with the obstacle, and the position where the collision with the obstacle is avoided Then, the handle is automatically returned to the position before sliding (original position) by the elastic force of the return elastic member by reducing the force by which the operator separates or grips the finger from the handle. Therefore, according to the third aspect, the handle can be rotated forward again without sliding the handle to the original position.

Therefore, according to the fastening device of the third aspect of the invention, if the handle cannot be rotated 360 degrees due to an obstacle existing in the middle of the rotation locus of the handle, the handle once slid is returned to the original position again each time. Since the operation is not required, the operation of fastening the object to be fastened becomes simpler and faster. In particular, according to the present invention, when it is necessary to repeatedly perform the operation of performing the reverse rotation operation after performing the rotation operation over a predetermined angle, the operator sets the handle to the original position every time the rotation operation is performed. It is very convenient because the trouble of sliding can be omitted.

According to the fastening device according to the first invention (the invention according to claim 1), even when the rotational torque transmitted to the one or the other of the fastening member is covered by the cover acts excessively, the it is possible to effectively prevent breakage of threads formed on one or other of the fastening member and the shaft is covered by the cover portion, of the object to be fastened is fastened by the one of the fastening member and the other fastening member said Damage can be effectively prevented. In particular, on the one hand fastening device according to the first invention, the rotational torque transmitted to the one or the other of the fastening member is covered by the cover portion, which unlike conventional fastening device, covered with the cover portion Or, an engagement concave portion formed on the outer peripheral surface of the other fastening member, and transmitted by an engagement member having a length in the radial direction of the shaft, and the engagement member constitutes a handle or one or more Since the other fastening member is disposed in the rotation operating portion having a tip in a radial direction or a direction inclined from the radial direction and is not disposed in the longitudinal direction of the shaft, the fastening device is disposed in the longitudinal direction of the shaft. Therefore, there is no possibility that an external force will carelessly act on the shaft, and there is no adverse effect such as deformation of the shaft and the member to be fastened. Further, according to the fastening device of the first invention, the shape of the workpiece to be fastened by the one fastening member and the other fastening member, and the situation around the fastening member covered by the cover portion are different. In the case where the object to be fastened or another obstacle is present in the middle of the rotation trajectory of the handle to be rotated, the handle collides with the obstacle, and the handle cannot be rotated continuously over 360 degrees. Even so, by sliding the handle, the collision with the obstacle can be avoided, and the object can be securely fastened.

Further, according to the fastening device of the second invention (the invention of claim 2), in the process of operating the handle in the forward rotation (any position in the rotation locus of the handle), an object to be fastened or another obstacle is obstructed. When the handle collides with an object, the handle is slid so that the engaging portion of the engaging member is positioned in the endless recess, and once reversely rotated over a predetermined angle, the cover is further covered by the cover portion. One or the other fastening member can be rotated forward, and the one or the other fastening member always covered by the cover can be fastened until a predetermined rotational torque is transmitted.

Further, according to the fastening device of the third invention (the invention according to claim 3), when the handle cannot be rotated 360 degrees due to an obstacle existing in the middle of the rotation trajectory of the handle, the handle once slid is returned to the original state. Since the operation of returning to the position is unnecessary each time, the work of fastening the object to be fastened becomes simpler and faster. In particular, according to the present invention, when it is necessary to repeatedly perform the operation of performing the reverse rotation operation after performing the rotation operation over a predetermined angle, the operator sets the handle to the original position every time the rotation operation is performed. It is very convenient because the trouble of sliding can be omitted.

It is a perspective view showing the fastening device concerning a 1st embodiment with an article to be fastened. It is sectional drawing which shows the fastening device shown in FIG. FIG. 3 is a cross-sectional view illustrating an internal structure of the fastening member illustrated in FIG. 2. It is sectional drawing which shows the state in which the front-end | tip of an engaging member has engaged with the engaging groove of the other fastening member. It is sectional drawing which expands and shows the other fastening member shown in FIG. FIG. 5 is a cross-sectional view showing a state after the handle lever has been rotated clockwise from the state shown in FIG. 4. FIG. 7 is a sectional view showing a state after the handle lever is further rotated clockwise from the state shown in FIG. 6. FIG. 8 is a cross-sectional view illustrating a state after the handle lever is further rotated clockwise from the state illustrated in FIG. 7. It is a perspective view showing the fastening device concerning a 2nd embodiment. It is sectional drawing which shows the fastening device shown in FIG. It is sectional drawing which shows the structure except the handle cover from the fastening device shown in FIG. It is sectional drawing which expands and shows the internal structure of the cover part which comprises the fastening device shown in FIG. FIG. 13 is a cross-sectional view showing a state after the handle lever has been slid rightward from the state shown in FIG. 12. It is a perspective view showing the conclusion device concerning a 3rd embodiment. It is a perspective view showing the fastening device concerning a 4th embodiment.

  Hereinafter, a fastening device according to a best mode for carrying out the present invention will be described in detail with reference to the drawings. First, a fastening device according to a first embodiment will be described.

  The fastening device according to the first embodiment is one in which the present invention is applied to a bicycle fastening device arranged at the center of a front wheel or a rear wheel of a bicycle, and a handle lever in which a handle lever described later is integrated. The present invention relates to an integrated bicycle fastening device (hereinafter referred to as a fastening device) 1, and as shown in FIG. It is concluded as. As shown in FIG. 2, the fastening device 1 includes a shaft 2 formed of a metal material such as iron in a cylindrical shape, and one fastening member 3 screwed to the right end (one end) of the shaft 2. And the other fastening member 4 screwed to the left end (the other end) of the shaft 2 are constituent elements.

  On the outer periphery of the right end side of the shaft 2, one screw 2 a to which the one fastening member 3 is screwed is threaded. On the outer periphery of the left end side of the shaft 2, the other fastening member 4 is screwed. The other screw 2b to be attached is threaded. Note that, in the fastening device 1 according to the first embodiment, a shaft side penetrating through the shaft 2 is located at a position on the right end side of the shaft 2 where the one fastening member 3 is screwed. A through hole 2c is formed.

  Further, the one fastening member 3 has a screw hole 3a in which a screw (symbol is omitted) screwed to the one screw 2a formed in the shaft 2 is formed at the center. An outer flange portion 3b is formed on one end (right end) side, and an inner flange portion 3c is formed on the other end (left end) side. The outer peripheral surface of the outer flange portion 3b is a portion to be gripped by fingers of an operator, and a large number of non-slip grooves (omitted by reference numerals) are formed on the outer peripheral surface. A cap mounting recess 3 e is formed on one end surface of the one fastening member 3. The cap mounting recess 3e is formed in a disk shape, and has one annular engaging claw (reference numeral is omitted) formed on an inner periphery of a wall surface (reference numeral is omitted). In addition, one protective cap 6 is detachably attached to the one fastening member 3 in the cap attaching concave portion 3e. The one protective cap 6 is formed integrally with a soft resin, has an outer shape substantially hemispherical, has a hollow inside, and has the one annular engaging claw on the outer periphery. Is formed with the other annular engaging claw (the reference numeral is omitted). The one fastening member 3 has a fastening member side through hole 3d formed between the outer flange portion 3b and the inner flange portion 3c. The inside diameter of the fastening member side through hole 3d is the same as the inside diameter of the shaft side through hole 2c, and one fastening pin 7 is provided between the fastening member side through hole 3d and the shaft side through hole 2c. Is press-fitted, and one fastening member 3 is fixed to the shaft 2. The left end face on which the inner flange portion 3c is formed is a portion that comes into contact with the right fork F2, which is the object to be fastened, disposed on the other fastening member 4 described later.

  The other fastening member 4 has a length in the same direction as the axial direction of the shaft 2 as shown in an enlarged view in FIG. A screw hole 4a is formed in the inner periphery of a screw (symbol is omitted) to be screwed to the other screw 2b. As shown in FIG. 5, a plurality of engagement grooves 4 b having a length in the same direction as the axial direction of the shaft 2 are provided on the outer periphery of the other fastening member 4. They are formed side by side in parallel in the circumferential direction. In the other fastening member 4, a reduced diameter portion 4c whose outer diameter is reduced is formed on the right side of the portion where the plurality of engagement grooves 4b are formed. A fitting recess 4d is formed in an annular shape on the outer peripheral surface of 4c. Each of the engagement grooves 4b is a portion with which a distal end surface of an engagement member 11 described later engages, and a handle lever 10 described later is rotated forward (clockwise in the figure). As a result, the inclined surface 4e with which the engaging portion 11a at the distal end of the engaging member 11 is engaged and the handle lever 10 are rotated in the reverse direction (counterclockwise in the figure) to rotate the engaging member 11 And the upright surface 4f with which the engaging portion 11a at the tip of the upper surface engages is continuous.

  On the right side of the other fastening member 4, a flange member 8 that comes into contact with the left fork F1 is mounted. The flange member 8 is formed at the center of a disk-shaped flange portion 8a, a cylindrical portion 8b formed on the left side surface of the flange portion 8a, and the flange portion 8a and the cylindrical portion 8b. It is composed of an insertion hole 8c through which the shaft 2 is inserted, and an annular fitting protrusion 8d formed on the inner peripheral surface of the cylindrical portion 8b and fitted into the fitting recess 4d. Therefore, as will be described later, when the other fastening member 4 is rotated forward and screwed toward one end of the shaft 2, the flange member 8 also moves to one end of the shaft 2 together with the other fastening member 4. I do. At this time, the flange portion 8 may be rotated along with the rotation of the other fastening member 4, and a small clearance may be provided between the fitting concave portion 4d and the fitting convex portion 8d. A configuration in which the flange 8 is moved in the axial direction of the shaft 2 without being rotated by the rotation of the other fastening member 4 may be adopted.

  A handle lever 10 is attached to the other fastening member 4. As shown in FIG. 1, FIG. 2 or FIG. 3, the handle lever 10 has a cover 10 a that covers the other fastening member 4, and a length in the radial direction of the other fastening member 4 from the cover 10 a. And one rotation operation unit 10b which is held by fingers of a worker and is rotated. As shown in FIG. 3, the cover portion 10a is formed in a hollow shape, and the other fastening member 4 is located inside the cover portion 10a. The cover 10a has a substantially rectangular shape inside the rotary operation portion 10b. An engaging member 11 formed of a molded plate is incorporated. As shown in FIG. 4, the rotation operation portion 10b in which the engagement member 11 is built has a length in the radial direction of the cover portion 10a and a housing for housing the engagement member 11 therein. The rotary operation unit includes a rotation operation unit main body in which a space 10c is formed (reference numerals are omitted), and a lid 13 fixed to the rotation operation unit main body via screws 12 to close the housing space 10c. A concave portion (not shown) for accommodating the head 12a of the screw 12 is formed on the outer surface of the rotary operation portion main body, and extends from the center of the concave portion to the accommodation space 10c. A first insertion hole (the reference numeral is omitted) through which the shaft portion 12b constituting the screw 12 is inserted is formed. The engaging member 11 has a second insertion hole 11b (see FIG. 3) through which the shaft portion 12b of the screw 12 is inserted at a position corresponding to the first insertion hole. The cover 13 is provided with a screw hole 13a into which the shaft 12b of the screw 12 is screwed. Accordingly, the plate-shaped engaging member 11 and the lid 13 are integrated with the rotary operation unit main body by the screw 12, and in the present embodiment, the engaging member 11 is removable. As shown in FIG. 4, a curved portion 13b is formed on the distal end side of the lid 13 so as to be gradually separated from the distal end side of the engaging member 11. As will be described later, an allowable space 10d that allows the elastic deformation of the engagement member 11 is formed between the inside and the tip end side of the engagement member 11.

  The engaging member 11 is formed of a metal or a hard resin which elastically deforms when a predetermined force is applied, and the engaging portion 11a formed at the tip is connected to the other fastening member. It is shaped to be inserted into an engagement groove 4b formed on the outer periphery of the member 4.

  As shown in FIG. 3, an O-ring 15 which is externally inserted into the reduced diameter portion 4c is built in the cover portion 10a which constitutes the handle lever 10, and the cover portion 10a has a structure shown in FIG. The middle right side is closed by a tubular portion 8b formed on the flange member 8. Further, a spacer 16 which is located inside the cover portion 10a and on the left side of the other fastening member 4 in FIG. 3 and which is externally fitted to the shaft 2 is disposed. A ring member 17 is disposed. The shaft 2 is inserted through the center of the ring member 17 and has a diameter larger than the inner diameter of the cover portion 10a. Therefore, the ring member 17 fits on the inner periphery of the cover portion 10a. A ring-shaped concave portion (symbol is omitted) is formed. Further, on the left side of the cover portion 10a constituting the handle lever 10, the other protective cap 19 is detachably mounted, and the other protective cap 19 forms an opening formed on the left side of the cover portion 10a. It is closed. The other protective cap 19 is made of the same material as the one protective cap mounted on the one fastening member 3 and is formed into the same shape. Is formed. In addition, on the inner periphery on the left side of the cover portion 10a, the other annular engaging claw (the reference numeral is omitted) that engages with the one annular engaging claw is formed.

  Hereinafter, the method for fastening the distal ends of the left and right forks F1 and F2 of the bicycle, which is the object to be fastened, to the hub device H and the fastening state by the fastening device 1 according to the first embodiment are released. The operation and effect of the fastening device 1 will be described while describing the method.

  First, when the object to be fastened is fastened by the fastening device 1, when the handle lever 10 shown in FIG. 4 is rotated forward (rotated clockwise in FIG. 4), the plurality of engagement members of the other fastening member 4 are rotated. One of the mating groove 4b (inclined surface 4e) and the engaging portion 11a of the engaging member 11 housed in the rotation operating portion 10b constituting the handle lever 10 are engaged with each other. The other fastening member 4 is rotated forward and moves along the shaft 2 so as to approach the one fastening member 3. The screwing of the other fastening member 4 accompanying the forward rotation of the handle lever 10 causes the other fastening member 4 to fasten the object to be fastened in cooperation with the one fastening member 3. When the object to be fastened is tightened (tightened) by the forward rotation operation of the handle lever 10, the resistance gradually increases, and the rotation torque of the other fastening member 4 reaches a predetermined torque. Then, as shown in FIG. 6, the engaging portion 11a formed at the tip of the engaging member 11 is elastically deformed in the allowable space 10d while slidingly contacting the inclined surface 4e. When the handle lever 10 is further rotated forward, as shown in FIG. 7, the engaging portion 4a of the engaging member 11 is moved to a specific position where the engaging portion 11a of the engaging member 11 has been engaged. 6 and rides on the outer peripheral surface of the other fastening member 4 formed between the engagement groove 4b and the other engagement groove 4b located clockwise in FIG. 6 from the position where the specific engagement groove 4b is formed. While sliding on the outer peripheral surface, as shown in FIG. 8, the engaging portion 11a eventually reaches the other engaging groove 4b and the distal end side of the engaging member 11 which has been elastically deformed up to that point is returned to the original state. It returns to the state of. That is, when the object to be fastened is fastened (tightened) by the forward rotation operation of the handle lever 10 and the rotation torque of the other fastening member 4 reaches a predetermined torque, FIG. The process shown in FIG. 8 is repeated, and the handle lever 10 idles without further rotation of the other fastening member 4. As described above, in the state in which the handle lever 10 is idling, the resistance is lower than in the state in which the rotational torque is acting on the other fastening member 4. In the process where the elastic deformation of the engagement member 11 is repeated at the same time as it can be sensed, a collision sound is generated between the engagement portion 11a of the engagement member 11 and the inclined surface 4e forming the engagement groove 4b. In addition, the worker can sense the idle state aurally.

  On the other hand, for the purpose of repairing or replacing an object to be fastened such as the left fork F1 or hub device H, or repairing or replacing a tire, the fastening state of the one fastening member 3 and the other fastening member 4 is changed. To release, the handle lever 10 is rotated in the reverse direction. By such a reverse operation of the handle lever 10, the engaging portion 11a formed on the engaging member 11 is engaged with the upright surface 4f forming the engaging groove 4b, and as a result, the other fastening member 4 is 2, the distance from the one fastening member 3 increases, and the fastened state of the fastened object is released.

  As described above, according to the fastening device 1 according to the first embodiment, when the other fastening member 4 reaches the predetermined rotational torque, the handle lever 10 idles due to the respective configurations. Cannot be further tightened (provided with a torque limit function), so that excessive torque is applied to the object to be fastened, or the screw threaded to the shaft 2 or the other fastening member 4 is threaded. This can effectively prevent the screw from being damaged. In particular, in the fastening device 1, the handle lever 10 that is rotated by an operator is incorporated in the fastening device 1 (integrated), so that it is not necessary to use a special tool, and the above-described operation is performed. Since the members having the torque limit function are not arranged in the axial direction of the shaft 4, the fastening device 1 is not extended in the axial direction of the shaft 2. Further, since the rotation operating portion 10b constituting the handle lever 10 has a length in the radial direction of the shaft 2 and the other fastening member 4, the fastening operation can be easily completed with an extremely small rotating torque. Furthermore, since the one and other protective caps 6 and 19 are attached to the fastening device 1, when the bicycle (not shown) falls over the shaft 2 and the one and other fastening members 3 and 4, , Even if some external force acts, the external force is absorbed by the one or the other protective caps 6 and 19, and is directly applied to the shaft 2 and the one and the other fastening members 3 and 4. Therefore, it is possible to eliminate the adverse effects such as the impact on the workpiece and the accompanying deformation or distortion. Further, the fastening device 1 according to the first embodiment has a structure in which an excessive rotational torque is prevented from acting on the other fastening member 4 due to the elastic deformation of the engagement member 11. Since the member 11 is fixed to the accommodation space 10c via the screw 12, it is possible to replace the member 11 with an engagement member 11 having a different elastic deformation and to deteriorate due to long-term use. When the necessity of replacing the engaging member 11 arises, it is possible to replace the engaging member 11 with a new one.

  Next, a bicycle fastening device 21 according to a second embodiment will be described in detail with reference to the drawings.

  The bicycle fastening device (hereinafter, referred to as a fastening device) 21 according to the second embodiment is mainly configured such that the configuration of the torque limit mechanism is changed to a different configuration and the handle lever is slidable. is there. Therefore, the common members will be described using the same reference numerals as those used in the fastening device 1 according to the first embodiment. explain.

  As shown in FIG. 9, the fastening device 21 includes a shaft 2, one fastening member 3 screwed to one end of the shaft 2, and another fastening member screwed to the other end of the shaft 2. A member 4 (see FIG. 10) and a handle lever 10 for covering the other fastening member 4 and rotating the other fastening member 4 are provided.

  As shown in FIG. 10 or FIG. 11, the shaft 2 is formed with one screw 2 a on which one fastening member 3 is screwed on the outer periphery on one end side, and the other fastening member 4 on the outer periphery on the other end side. The other screw 2b to which is screwed is screwed. In the fastening device 21 according to the second embodiment, a shaft that penetrates the shaft 2 is provided at a position on the other end side of the shaft 2 where the other fastening member 4 is screwed. A side through hole 2c is formed, and a screw hole 2d into which a shaft portion 29b of a fixing bolt 29 described later is screwed is formed on the other end surface of the shaft 2.

  The one fastening member 3 has a screw hole 3a formed at the center, an outer flange portion 3b at one end (right end), and an inner flange portion 3c at the other end (left end). Have been. A cap mounting recess 3e is formed on one end surface of the one fastening member 3, and one annular engagement is formed on the inner periphery of the wall surface (reference numeral is omitted) of the cap mounting recess 3e. Claws (reference numerals are omitted) are formed, and one protection cap 6 is detachably attached to the one fastening member 3 in the cap attachment recess 3e. In the fastening device 21, a circular opening 6 a having a diameter slightly larger than the outer diameter of the shaft 2 is formed at the center of the one protective cap 6.

  As shown in FIG. 11 or 12, the other fastening member 4 has a screw (not shown) at the center screwed to the other screw 2b formed on the shaft 2 at the center. A plurality of engaging grooves 4b having a length in the same direction as the axial direction of the shaft 2 are formed on the outer periphery in the circumferential direction of the other fastening member 4, respectively. They are formed side by side in parallel. In the fastening device 21 according to the second embodiment, the engagement groove 4b has a first endless recess 4g formed in an annular shape in a circumferential direction of the other fastening member 4, and the first groove 4b is formed in an annular shape. The engagement groove 4b is divided into right and left with the endless recess 4g therebetween. Further, a left reduced diameter portion 4h is formed on the left outer periphery of the left engagement groove 4b (shown in FIG. 12) (the other outer periphery of the other engagement member 4). In the fastening member 21, the first endless recess 4g and the left reduced diameter portion 4h have the same width. On the other side of the other fastening member 4 on which the plurality of engagement grooves 4b are formed, a right-side reduced diameter portion 4c whose outer diameter is reduced is formed. The fitting recess 4 d is formed in an annular shape on the outer peripheral surface of the diameter portion 4 c and in the middle portion on the right end side of the other fastening member 4. Each of the engagement grooves 4b is a portion to which a distal end surface of an engagement member 31 described later is engaged, and similarly to the engagement member 11 described above, the handle lever 10 described later is directly engaged. The inclined surface 4e with which the engaging portion 31a at the distal end of the engaging member 31 engages by being rotated, and the engaging portion 31a at the distal end of the engaging member 31 by rotating the handle lever 10 in the reverse direction. The engaging upright surface 4f is continuous. The other fastening member 4 has a through hole 4j penetrating the other fastening member 4 in the radial direction, and is fixed to the through hole 4j and the shaft side through hole 2c formed in the shaft 2. The pin 23 is press-fitted.

  As shown in FIG. 12, a flange member 8 that contacts the left fork F1 is mounted on the right side of the other fastening member 4. The description of the flange member 8 is omitted because it is the same as that of the fastening device 1 according to the first embodiment. A handle lever 10 is attached to the other fastening member 4. As shown in FIG. 9 or FIG. 10, the handle lever 10 has a cover 10 a that covers the other fastening member 4, and has a length from the cover 10 a in the radial direction of the other fastening member 4, One rotation operation unit 10b that is gripped by a finger of an operator and is rotated. The cover part 10a is formed in a hollow shape, and the other fastening member 4 is located inside. The rotary operation unit 10b includes a first storage space 10c and a second storage space 10e communicating with the first storage space 10c connected in series from the base end to the distal end of the rotation operation unit 10b. It is formed in the state where it was done. The first housing space 10c has an engaging member 31 housed therein, and is closed by a lid 13. The lid 13 is fixed by screws 12 shown in FIG. Further, as shown in FIG. 10, the second accommodation space 10e is formed in a cylindrical shape from the tip of the rotary operation part 10b to the first accommodation space 10c side. On the inner peripheral surface of the accommodating space 10e, one screw groove (not shown) is threaded. An elastic member accommodating member 25 in which a spherical body 24 is rotatably supported at the tip is screwed to the second accommodation space 10e. A cylindrical spring accommodating space 25a is formed inside the elastic member accommodating member 25, and a pressing spring 26 as an elastic member having a distal end in contact with the sphere 24 is accommodated in the spring accommodating space 25a. Have been. The distal end surface of the elastic member accommodating member 25 is exposed to the outside, and at the center of the distal end surface, a turning operation concave portion 25b into which a distal end of a tool (not shown) such as a wrench is inserted is formed. Therefore, by inserting the tip of the tool into the rotary operation concave portion 25b and rotating the tool, the elastic member accommodating member 25 moves together with the spherical body 24 in the direction of the other fastening member 4 or in the opposite direction. Or screwed back.

  In addition, as described above, the engaging member 31 of the fastening device 21 according to the second embodiment is housed in the first housing space 10c as described above. It is slidably housed in the first housing space 10c in the direction of the other fastening member 4 and in the opposite direction. As shown in FIG. 11 or FIG. 12, the engaging member 31 of the fastening device 21 has two engaging portions 31a, 31a which are engaged with the engaging grooves 4b, 4b at its tip. A notch 31b is formed between the two engaging portions 31a. The width of these two engaging portions 31a, 31a is formed to be substantially the same as the width of the above-mentioned engaging grooves 4b, 4b, and the first endless recess 4g formed on the outer periphery of the other fastening member 4. And a width slightly shorter than the width of the left reduced diameter portion 4h. In the center of the engagement member 31, an elongated hole 31c into which a screw 12 (a shaft portion 12b thereof) for fixing the lid 13 to the rotation operation portion 10b is inserted. The length of the long hole 31c has a length in the radial direction of the shaft 2, and is at least longer than the sliding length of the engagement member 31 sliding.

  As will be described later, when the handle lever 10 is slid, the distal end surface (inner peripheral surface) is provided on the inner peripheral surface of the cover portion 10 a constituting the handle lever 10. An annular convex portion 10g that is in sliding contact with the outer peripheral surface of the right-side reduced-diameter portion 4c is formed (see FIG. 10). An O-ring 15 is inserted outside the position where the annular convex portion 10g is disposed and in the middle of the right-side reduced-diameter portion 4c, and the right side of the cover portion 10a in FIG. Is closed by fitting the cylindrical portion 8b formed on the flange member 8 to the fitting projection 8d. A spacer 16 is disposed inside the cover portion 10a and on the left side of the other fastening member 4 in FIG. 10 and externally fitted to the shaft 2. A ring member 17 is disposed. The shaft 2 is inserted through the center of the ring member 17 and has a diameter larger than the inner diameter of the cover portion 10a. Therefore, the ring member 17 fits on the inner periphery of the cover portion 10a. A ring-shaped concave portion (symbol is omitted) is formed. Further, a washer 18 is accommodated on the left side of the ring member 17. The other protective cap 19 is detachably mounted on the left side of the cover 10a constituting the handle lever 10, and the other protective cap 19 closes an opening formed on the left side of the cover 10a. ing.

  The other protective cap 19 constituting the fastening device 21 according to the second embodiment has a substantially hemispherical overall shape as shown in an enlarged view in FIG. That is, the other protective cap 19 is provided with a hemispherical surface 19a which bulges outward. On the opposite side of the hemispherical surface 19a, the outer shape is located on the other fastening member 4 side and has a circular outer shape. The inner circular end face 19b is formed outside the inner circular end face 19b, and the outer shape is formed outside the inner end face 19b and to the left of the position where the inner circular end face 19b is formed. And a circular outer end face 19c. A large-diameter hole 19d and a small-diameter hole 19e communicating with the large-diameter hole 19d and having the same axis as the large-diameter hole 19d are formed in the center of the other cap 19, respectively. . The small diameter hole 19e has an opening at the center of the inner circular end face 19b. The other protective cap 19 has an annular concave portion 19f formed inside the outer circular end face 19c. The annular concave portion 19f surrounds the large-diameter hole 19d and the small-diameter hole 19e at a position outside the position where the large-diameter hole 19d and the small-diameter hole 19e are formed. Is formed. The washer 18, the outer circular end face 19c, and the annular concave portion 19f face each other. The other cap 19 thus formed is fixed to the other end of the shaft 2 by a fixing bolt 29. The head 29a formed on the fixing bolt 29 is inserted through the large-diameter hole 19d, and the shaft portion 29b is inserted through the small-diameter hole 19e. In the center of the head 29a, there is formed a turning operation hole 29c into which the tip of a tool (not shown) is inserted and locked by the tool. By the operation, the other protective cap 19 is configured to approach or separate from the other end of the shaft 2. The return elastic member 30 is accommodated in the annular concave portion 19f. The return elastic member 30 is made of a coil spring, and has one end in contact with the washer 18 and the other end in contact with the other protective cap 19.

  In the fastening member 21 according to the second embodiment, the handle lever 10 configured as described above is slidable in the length direction of the other fastening member 4. FIG. 13 shows a state after the handle lever 10 has been slid from the state shown in FIG. 10 or FIG. 12. With this fastening member 21, an operator can use the fingers to rotate the rotation operation unit 10b. When the handle lever 10 is slid in the direction away from the one fastening member 3 (left side in FIG. 10) while being gripped, the distal end surface (inner periphery) of the annular convex portion 10g formed in the cover portion 10a is operated. The return elastic member accommodated in the annular concave portion 19f of the other protective cap 19 while being slid and guided by the outer peripheral surface of the right-side reduced diameter portion 4c formed on the other fastening member 4. It is configured to slide in the above direction against the elastic force of 30. In addition, by the sliding operation of the handle lever 10, the washer 18 compresses the elastic member 30 for return and comes into contact with the outer circular end face 19c, and the washer 18 comes into contact with the outer circular end face 19c. As a result, the handle lever 10 is not slid further.

  In the following, a method for fastening the hub devices H to the distal ends of the left and right forks F1 and F2 of the bicycle to be fastened by the fastening device 21 according to the second embodiment and the fastening state are released. The operation and effect of the fastening device 21 will be described while describing the method of performing the operation.

  First, when the object to be fastened is fastened by the fastening device 21, the handle lever 10 is rotated forward in the same manner as in the fastening device 1 according to the first embodiment. By the forward rotation operation of the handle lever 10, a plurality of engagement grooves 4b, 4b formed in the other fastening member 4 and the engagement member 11 housed in the rotation operation portion 10b constituting the handle lever 10 Are engaged with each other, the other fastening member 4 is rotated forward. In the fastening device 21 according to the second embodiment, as described above, the other fastening member 4 and the shaft 2 are fixed to each other via the fixing pin 23. By the forward rotation operation, the other fastening member 4 and the shaft 2 integrally rotate forward, the one fastening member 3 and the other fastening member 4 approach each other, and the other fastening member 4 and the one The fastening member 3 jointly fastens the object to be fastened. When the object to be fastened is tightened (tightened) by the forward rotation operation of the handle lever 10, the resistance gradually increases, and the rotation torque of the other fastening member 4 reaches a predetermined torque. Then, each engaging portion 31a formed at the tip of the engaging member 31 slides on the inclined surface 4e, and the entire engaging member 31 is fastened to the other side against the elastic force of the pressing spring 26. It is slid in a direction away from the member 4. When the handle lever 10 is further rotated forward, the engaging portion 4a of the engaging member 31 is engaged with the specific engaging groove 4b with which the engaging portion 31a of the engaging member 31 has been engaged. Of the other fastening member 4 formed between the position where the engaging groove 4b is formed and the other engaging groove 4b arranged in the rotational direction of the handle lever 10, and while sliding on the outer circumferential surface, The engaging portion 31a reaches the other engaging groove 4b and the distal end side of the engaging member 31 that has been slid up to that point returns to the original state. That is, by the forward rotation operation of the handle lever 10, the workpiece is fastened (tightened), and when the rotation torque of the other fastening member 4 reaches a predetermined torque, the other fastening member 4 is further rotated. The handle lever 10 idles (slips) without the fastening member 4 rotating. As described above, in the state in which the handle lever 10 is idling, the resistance is lower than in the state in which the rotational torque is acting on the other fastening member 4. In the process in which the sliding of the engaging member 31 is repeated at the same time as it can be sensed, the collision sound between the engaging portion 31a of the engaging member 31 and the engaging groove 4b is generated, and the worker is idle. The state can also be sensed audibly.

  When the handle lever 10 is slid in a direction away from one of the fastening members 3 when the handle lever 10 is normally rotated, the entire handle lever 10 resists the elastic force of the return elastic member 30. When the handle lever 10 is rotated in the reverse direction when the washer 18 comes into contact with the outer circular end face 19c, the other fastening member 4 does not rotate forward, and only the handle lever 10 is rotated. Spins idle. Therefore, if an obstacle (not shown) is present during the forward rotation operation of the handle lever 10 (during the rotation locus of the handle lever 10) and the handle lever 10 cannot be rotated forward by 360 degrees, the handle lever 10 is caused to idle. When the handle lever 10 gripped so far is released or the force is released, the handle lever 10 is slid by the elastic force of the return elastic member 30. Returns to the previous state. By further performing the forward rotation operation when the handle lever 10 returns in this manner, the other fastening member 4 and the shaft 2 can be rotated forward, and the object to be fastened can be tightened.

  On the other hand, for the purpose of repairing or replacing an object to be fastened such as the left fork F1 or hub device H, or repairing or replacing a tire, the fastening state of the one fastening member 3 and the other fastening member 4 is changed. To release, the handle lever 10 is rotated in the reverse direction. When the handle lever 10 is rotated in the reverse direction, the engaging portions 31a, 31a formed on the engaging member 31 are engaged with the upright surface 4f forming the engaging groove 4b, and as a result, the other fastening member is formed. 4 and one of the fastening members 3 are separated from each other, and the fastening state of the object to be fastened is released.

  As described above, according to the fastening device 21 according to the second embodiment, similarly to the fastening device 1 according to the first embodiment described above, the other fastening members are provided by the respective configurations described above. When the rotation torque reaches a predetermined rotational torque, the handle lever 10 idles and cannot be further engaged (it has a torque limit function), so that excessive torque acts on the workpiece. It is possible to effectively prevent the screw threaded on the shaft 2 or the screw threaded on the other fastening member 4 from being damaged. Also, in the fastening device 21, the handle lever 10 that is rotated by the operator is incorporated in the fastening device 21 (integrated), so that it is not necessary to use a special tool, and the above-described operation is performed. Since the members having the torque limit function are not arranged in the axial direction of the shaft 4, the fastening device 21 is not extended in the axial direction of the shaft 2. Further, since the rotation operating portion 10b constituting the handle lever 10 has a length in the radial direction of the shaft 2 and the other fastening member 4, the fastening operation can be easily completed with an extremely small rotating torque.

  In particular, in the fastening device 21, as described above, since the handle lever 10 can be slid in the axial direction of the shaft 2, the handle lever 10 can be moved not only during the forward rotation operation of the handle lever 10 but also during the reverse rotation operation. If an obstacle exists in the middle of the rotation trajectory 10, the handle lever 10 can be slid to a position where the handle lever 10 does not collide with the obstacle before rotating. Further, by sliding the handle lever 10 until the washer 18 comes into contact with the outer circular end face 19c, each of the engaging members 31a, 31a is connected to the first endless member formed on the other fastening member 4. Since the handle lever 10 is moved to the position where the concave portion 4g and the left-side reduced diameter portion 4h are formed, the handle lever 10 can idle (slip). As a result, even if there is an obstacle in the middle of the rotation trajectory of the handle lever 10, even if the handle lever 10 is slid, the rotation of the handle lever 10 continued for 360 degrees cannot be performed. By rotating the handle lever 10 in the reverse rotation direction or the normal rotation direction for a predetermined angle, and then returning the handle lever 10 to the position before sliding, and then repeating the operation of rotating the handle lever 10 forward or reverse again, The other fastening member 4 can be rotated forward or backward. Further, in the fastening member 21, since the return elastic member 30 is disposed in the other protective cap 19, when the obstacle is present in the rotation locus of the handle lever 10, it is slid once. It is not necessary to perform the sliding operation each time the handle lever 10 is slid to the position before sliding.

  In the fastening device 21 according to the second embodiment, as shown in FIG. 12, the handle lever 10 is normally moved by the return elastic member 30 arranged in the other protective cap 19 as shown in FIG. When the bicycle (not shown) falls down or the hemispherical surface 19a of the other protection cap 19 bulging outward collides with an obstacle, because the bicycle is always biased in the direction of the other fastening member 4. However, the external force acting on the other protective cap 19 due to the collision is absorbed by the elastic force of the return elastic member 30, and does not reach the other fastening member 4 or the object to be fastened. It is possible to further protect the workpiece. In other words, in the fastening device 21 according to the second embodiment, the return elastic member 30 has a function of returning the handle lever 10 to a state before the handle lever 10 is slid, and a function of returning an object to be fastened by a collision with an external force. Performs protection function at the same time.

  Further, in the fastening devices 1 and 21 according to the above embodiments, the rotation operation unit 10b constituting the handle lever 10 is single, but the rotation operation unit constituting the present invention is, for example, as shown in FIG. As shown in FIG. 15, a bicycle fastening device (hereinafter, referred to as a fastening device) 41 in which first and second rotation operation portions 42b and 42c are formed may be used, or as shown in FIG. A bicycle fastening device (hereinafter, referred to as a fastening device) 51 in which the first, second, and third rotation operation portions 52b, 52c, 52d are formed may be used. The fastening device 41 shown in FIG. 14 is related to the third embodiment, and the fastening device 51 shown in FIG. 15 is related to the fourth embodiment. The fastening device 41 includes the shaft 2 described above, one fastening member 3 screwed to one end of the shaft 2, and a cover screwed to the other end of the shaft 2 to form a handle lever 42. The other fastening member (not shown) located in the portion 42a is a component. The same components as those of the fastening member 21 and the like according to the second embodiment are arranged in the cover portion 42a. The handle lever 42 is formed with a first rotation operation part 42b extending from the outer periphery of the cover part 42a in the axial direction of the shaft 2, and the first rotation operation part 42b is extended. On the side opposite to the side from which it is projected, a second rotation operation section 42c is formed. The first and second rotary operation portions 42b and 42c accommodate the engagement members that exhibit the torque limit function described in the fastening devices 1 and 21 according to the first or second embodiment. I have. As shown in FIG. 15, the fastening device 51 according to the fourth embodiment includes the shaft 2, one of the fastening members 3 screwed to one end of the shaft 2, and the other of the shaft 2. The other fastening member (not shown), which is screwed to the end side and located in the cover portion 52a constituting the handle lever 52, is a constituent element. The same components as the fastening member 21 and the like according to the second embodiment are arranged in the cover 52a. On the outer periphery of the cover portion 52a formed on the handle lever 52, first to third rotary operation portions 52b, 52c, 52d formed in the same shape are provided in the circumferential direction of the cover portion 52a. And are formed at equal angles. The first to third rotation operating portions 52b, 52c, 52d have engaging members that exhibit the torque limit function described in the fastening devices 1, 21 according to the first or second embodiment. Is housed.

  According to the fastening devices 41, 51 according to the third or fourth embodiment, when the handle levers 42, 52 are rotated, the first and / or second rotation operation parts 42b, 42c are operated. Alternatively, since the rotating operation can be performed while grasping all or a part of the first to third rotating operation portions 52b, 52c, 52d with fingers, the workpiece can be fastened with a simpler and smaller rotating force. At the same time, the fastening state of the object can be released. In the case where a plurality of rotation operation portions (reference numerals are omitted) constituting the handle levers 42 and 52 are formed like the fastening devices 41 and 51 according to the third or fourth embodiment, these rotations are performed. A disc-shaped flat plate (not shown) is provided on the back side (the workpiece side) of the operation unit, and each rotary operation unit is integrally formed on the outer surface of the flat plate (the surface opposite to the workpiece side). It may be made of. By further providing such a flat plate, when the operator rotates the handle levers 42, 52, the risk of injury due to the fingers being pinched between the workpiece and the handle levers 42, 52 is effectively reduced. Can be prevented.

  As described at the beginning, the fastening device 1 according to the first embodiment and the fastening device 21 according to the second embodiment described above are designed to apply the present invention to the center of the front wheel or the rear wheel of the bicycle. The present invention is applied to a bicycle fastening device disposed in a bicycle. However, the present invention is not limited to a bicycle fastening device, and one fastening screwed or fixed to one end of a shaft. A basic configuration comprising a member and the other fastening member fixed or screwed to the other end side of the shaft, and fastening an object to be fastened by the one fastening member and the other fastening member. May be applied to other fastening devices. In the fastening device 1 according to each of the above-described embodiments and the fastening device 21 according to the second embodiment, the cover portion 10a constituting the present invention surrounds the entire periphery of the other fastening member 4. However, the cover 10a may be provided with a slit or an opening (not shown). By providing such a slit or opening in the cover portion 10a, the weight of the entire fastening device can be reduced. In addition, the rotary operation portion 10b constituting the present invention is not limited to the one having the distal end in the radial direction of the one or the other fastening members 3 and 4, but is inclined from the radial direction of the one or the other fastening members 3 and 4. May have a tip in the direction described. In other words, the rotary operation portion 10b of the present invention includes not only the radial component of the one or the other fastening members 3 and 4 but also the axial component of the shaft in the radial component. There may be. Furthermore, in the fastening device 1 according to each embodiment described above and the fastening device 21 according to the second embodiment, one or the other fastening member 3, 4, the engagement groove is formed on the outer periphery. However, the engagement recess constituting the present invention is not necessarily configured as the engagement groove, but is formed as a predetermined length like the engagement groove. It may be formed as an engaging recess having no thickness.

DESCRIPTION OF SYMBOLS 1 Bicycle fastening device 2 Shaft 3 One fastening member 4 The other fastening member 4a Screw hole 4b Engaging groove 4c (Right) Reduced diameter portion 4e Inclined surface 4f Erect surface 4g First endless recess 6 One protective cap 10 Handle Lever 10a Cover portion 10b Rotating operation portion 10c First accommodation space 10d Allowable space 11 Engaging member 11a Engaging portion 19 The other protective cap 21 Bicycle fastening device 26 Press spring 30 Return elastic member 31 Engaging member 31a Engage Part 41 Bicycle fastening device 42 Handle lever 42a Cover portion 42b First rotation operation portion 42c Second rotation operation portion 51 Bicycle fastening device 52a Cover portion 52b First rotation operation portion 52c Second rotation operation portion 52d 3 rotation operation unit

Claims (3)

A shaft on which one fastening member is fixed or screwed on one end side, and the other fastening member is screwed or fixed on the other end side,
A cover portion that covers at least a part of the outer periphery of any one of the one fastening member and the other fastening member, and a radial direction of the one or other fastening member covered by the cover portion or a direction inclined from the radial direction. A handle having a rotary operation unit having a tip,
On the outer peripheral surface of one or the other fastening member covered by the cover portion , a plurality of engagement recesses are formed at equal intervals in the circumferential direction of the one or the other fastening member respectively covered by the cover portion. And
In the rotation operation portion, the tip engages with the engagement recess, and when the rotation torque transmitted to one or the other fastening member covered by the cover reaches a predetermined rotation torque, the engaging member plate-like engagement state is caused to release the Re et al move said engaging recess is disposed in a direction away from the engagement recess,
The engagement recess with which the engagement member is engaged is an engagement groove having a length in the same direction as the length direction of the shaft,
The handle is slidable in a longitudinal direction of the shaft over a predetermined sliding range, and the one or other fastening member covered by the cover portion is rotated at a position within the sliding range. possible and to be formed by the fastening device according to claim. On the outer periphery of the one or other fastening member covered by the cover portion, an endless recess having a width shorter than the length of the slide range within the slide range of the handle is covered by the cover portion. Or formed in the circumferential direction of the other fastening member,
At the tip of the engaging member, an engaging portion that engages with the engaging groove and is formed to have a width shorter than the width of the endless concave portion is formed.
When the handle is slid within the slide range,
The fastening device according to claim 1, wherein the engagement portion is movable in the endless recess . A cap is mounted on one end or the other end of the shaft. Inside the cap, the handle is attached to the other end of the shaft such that the tip of the engaging member always returns to a position where the engaging member always engages with the engaging groove. 3. The fastening device according to claim 2, wherein a return elastic member biasing to one side or one end side is housed .