JP2018071617A - Fastener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel fastener which is not largely elongated in a length direction of a shaft member while having a torque limit function so as to prevent the breakage or the like of a fastening member and a fastened member caused by excessive torque.SOLUTION: A fastener comprises a shaft 2, one and the other fastening members 3, 4 for fastening a fastened object, and a handle 10 having a cover part 10a for covering an external periphery of the other fastening members 4, and a rotation operation part 10b having a length in a radial direction of the shaft 2. A plurality of engagement recesses 4b are formed at an external peripheral face of the other fastening member 4, and an engagement member 11 which is engaged with the engagement recesses 4b at its tip, moved to a direction in which the engagement member separates from the engagement recesses 4b, or elastically deformed at its tip side when a rotation force of the other fastening member 4 reaches prescribed torque, and released in an engagement state with the engagement recesses 4b is arranged in the rotation operation part 10b.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a fastening device that fastens while fastening a fastened object by one fastening member and the other fastening member, and in particular, a fastening device that fastens the fastened object while rotating the one or the other fastening member. It is about.

  The fastening device is widely used for fastening a predetermined object to be fastened by a head of the bolt and a nut, such as a bolt that is one fastening member and a nut that is the other fastening member. That is, a fastening device composed of the bolt and nut will be described as an example. One screw threaded on the outer periphery of the shaft portion of the bolt is connected to the other screw threaded on the inner peripheral surface of the nut. 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 on the screw and screwing the nut or 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 the other fastening member itself is deformed. If an excessive force is applied to the object, the object to be fastened may be abnormal.

  Therefore, conventionally, a function (torque limit function) for preventing an excessive torque from acting on such a fastening device is provided, and when a certain torque is applied, the one or the other fastening member is further installed. There has been proposed one configured such that it cannot be rotated (see Patent Publications 1, 2, 3, and 4). In these fastening devices, a shaft member such as a shaft in which one screw is screwed, and the other screw screwed to one screw formed in the shaft member are screwed and one engagement is performed. A fastening member formed with a portion, a moving member provided with the other engaging portion that engages with one engaging portion formed on the fastening member, a spring that presses the moving member toward the fastening member, and the like When a predetermined torque acts on the fastening member, the moving member resists the pressing force (elastic force) of the pressing member and the fastening member side is It moves in the opposite direction, and it is comprised so that engagement with one engaging part and the other engaging part which were mutually engaged until then may be cancelled | released. Therefore, when the moving member moves, even if the moving member is rotated, the engagement between one engaging portion and the other engaging portion is released, so the moving member is idled, As a result, excessive torque does not act on the fastening member.

Japanese Utility Model Publication No. 6-43322 Japanese Utility Model Publication No. 7-10537 Japanese Patent Laid-Open No. 10-47326 JP 2005-226789 A

  However, in the techniques disclosed in the above patent documents, the arrangement position of one engagement portion formed on the fastening member and the arrangement position of the other engagement portion formed on the moving member are mutually different from each other. The arrangement position of the pressing member (spring) for pressing the moving member in the fastening member direction and the length direction of the pressing member are both on the axial extension line of the shaft member. Has been.

  Therefore, in the techniques disclosed in each of the above patent documents, the entire fastening device is extended in the axial direction of the shaft member, so that an external force may inadvertently act on the shaft, and thus the shaft member or the member to be fastened. There are adverse effects 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 damage to a fastening member or an object to be fastened due to excessive rotational torque. An object of the present invention is to provide a novel fastening device that has a torque limit function so as not to be greatly extended in the length direction of the shaft member.

  The present invention has been proposed in order to solve the above-mentioned problems, and the first invention (the invention according to claim 1) has one fastening member fixed or screwed to one end side. In addition, the other fastening member is screwed or fixed to the other fastening member, a shaft covering at least a part of the outer periphery of the one fastening member or the other fastening member, and the one or the other fastening member. A handle having a distal end in a radial direction of the fastening member or in a direction inclined from the radial direction, and a plurality of engaging recesses on an outer peripheral surface of the one or the other fastening member. Are formed at equal intervals in the circumferential direction of the one or the other fastening member, and the tip of the rotation operation portion engages with the engagement recess and the rotation of the one or the other fastening member. When the force reaches the predetermined rotational torque An engagement member that is moved in a direction away from the engagement recess or is elastically deformed at the distal end side and is released from the engagement state with the engagement recess is arranged. .

  The fastening device according to the first aspect of the present invention has a shaft in which one fastening member is fixed or screwed to one end side and the other fastening member is screwed or fixed to the other end side. It is a component. That is, one fastening member arranged on one end side of the shaft may be fixed to the shaft or screwed, and the other fastening member arranged on the other end side of the shaft May be fixed to the shaft or screwed. In any case, the engaged object is fastened jointly by the one fastening member and the other fastening member. In the present invention, a handle is provided. The handle includes a cover portion that covers at least a part of the outer periphery of the one fastening member or the other fastening member, and the radial direction of the one or other fastening member or the A rotation 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 handle-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, this cover portion may not only cover the entire outer periphery of the one fastening member or the other fastening member, but may also be formed with a slit or an opening. Moreover, the handle | steering wheel which comprises this invention is provided with the rotation operation part which has a front-end | tip in the radial direction of the said one or other fastening member, or the direction inclined from this radial direction, as mentioned above. Still further, in the present invention, a plurality of engaging recesses are formed on the outer peripheral surface of the one or other fastening member at equal intervals in the circumferential direction of the one or other fastening member, respectively. In the rotation operation portion, the tip engages with the engaging recess, and when the rotational force of the one or the other fastening member reaches a predetermined rotational torque, the tip is moved away from the engaging groove. Alternatively, an engagement member is disposed that is elastically deformed at the distal end side and is released from the engagement state with the engagement groove. The engagement recess is a portion where at least the tip of the engagement member engages. Therefore, the engagement recess is not only an engagement groove having a predetermined length (see claim 5), but also other configurations. It may be. In addition, the engagement member can be moved away from the engagement recess when the one or other fastening member reaches a predetermined rotational torque, and the distal end side is elastically deformed. Both of which are released from the engagement state with the engagement recess are included. Therefore, when a torque greater than a predetermined rotational torque acts on one or the other engagement member and the engagement between the tip of the engagement member and the engagement recess is released, the handle is further rotated forward. However, the rotational force does not act on one or the other of the fastening members, so that it rotates idly.

  Therefore, according to the fastening device according to the first aspect of the present invention, even if excessive torque is applied to one or the other fastening member, it is formed on the one or the other fastening member or the shaft. The breakage of the screw can be effectively prevented, and the breakage of the fastened object fastened to the one by the fastening member and the other fastening member can be effectively prevented. In particular, in the fastening device according to the first aspect of the present invention, the rotational torque for one or the other fastening member is different from that of the conventional fastening device, and the engagement recess formed on the outer peripheral surface of the one or the other fastening member. And is transmitted by an engagement member having a length in the radial direction of the shaft, and the engagement member constitutes a handle in a radial direction of one or the other fastening member or in a direction inclined from the radial direction. The fastening device is not extended in the length direction of the shaft because it is arranged in the rotary operation portion having the tip and is not arranged in the length direction of the shaft. In other words, the shaft and the fastened member are not adversely affected.

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

  According to a second invention (invention of claim 2), in the first invention, the one or the other fastening member rotates in the forward direction in the engagement recess to which the tip of the engagement member is engaged. And when the rotational force of the one or the other fastening member reaches a predetermined rotational torque, an inclined surface for releasing the engagement member in a direction away from the engagement recess, When one or the other fastening member is rotated in the reverse direction, an upstanding surface that engages with the tip of the engaging member is formed, and the above-mentioned engaging member is formed in the rotation operation portion that constitutes the handle. The engaging member is accommodated and an accommodating space for guiding the movement of the engaging member is formed, and the engaging member is engaged with the engaging recess in the rotation operation portion. It is also characterized in that an elastic member that presses is arranged It is.

  In the fastening device according to the second invention, when one or the other fastening member is rotated in the forward rotation direction, and the rotational force of the one or the other fastening member reaches a predetermined rotational torque. The front end of the engagement member moves in a direction away from one or the other fastening member while being in sliding contact with the inclined surface and against the elastic force of the elastic member. The engagement state between the engagement recess and the tip of the engagement member that have been engaged is released.

  Therefore, according to the fastening device according to the second aspect of the present invention, when one or the other fastening member is rotated forward to fasten the article to be fastened, the one or the other is kept in a stable state until a predetermined rotational torque is reached. When the other fastening member can be rotated and a predetermined rotational torque is reached, no further forward rotation operation is possible, and when one or the other fastening member is rotated backward, Since the front end of the engaging member and the upright surface are reliably engaged by the elastic force of the elastic member, the fastened state of the fastened object that has been fastened so far can be released.

  The elastic member only needs to have a function of pressing at least the engagement member in the direction of the engagement recess, and may be, for example, a leaf spring or a coil spring.

  Further, according to a third invention (invention of claim 3), in the first invention, the one or the other fastening member is forwardly rotated in the engagement recess to which the tip of the engagement member is engaged. When the rotational force of the one or the other fastening member reaches a predetermined rotational torque, the inclined surface for elastically deforming the engaging member, and the one or the other of the fastening members. When the fastening member is rotated in the reverse rotation direction, an upstanding surface that engages with the tip of the engaging member is formed, and an inner side from the cover portion that constitutes the handle to the rotation operation portion. Is characterized in that an allowable space for allowing elastic deformation of the engaging member is formed.

  In the fastening device according to the third aspect of the invention, when one or the other fastening member is rotated in the forward rotation direction, and the rotational force of the one or the other fastening member reaches a predetermined rotational torque In this case, the distal end side of the engaging member is elastically deformed in the allowable space while being in sliding contact with the inclined surface. Therefore, even if the handle is further rotated forward, the rotational torque acts on the other fastening member. There is nothing to do.

  Therefore, even in the case of the fastening device according to the third invention, when one or the other fastening member is rotated forward to fasten the article to be fastened, it remains in a stable state until a predetermined rotational torque is reached. When one or the other fastening member can be rotated and a predetermined rotational torque is reached, no further forward rotation operation is possible, and when one or the other fastening member is rotated in reverse. In this case, the front end of the engaging member and the rising surface can be reliably engaged, and the fastened state of the fastened object that has been fastened until then can be released. In particular, since the third invention does not use an elastic member as in the second invention, the number of parts can be reduced and the weight of the entire fastening device can be reduced.

  According to a fourth invention (invention according to claim 4), in any one of the first, second, or third invention, the rotation operation unit is configured such that the rotation direction of the one or the other fastening member is One or a plurality of handle levers having a length in a direction inclined from the radial direction, and the length of the rotation operation portion being longer than the outer diameter of the one or the other fastening member. It is characterized by being.

  In the fastening device according to the fourth aspect of the invention, the rotation operation unit has a length in the radial direction of the one or the other fastening member or in a direction inclined from the radial direction. Since the length is one or a plurality of handle levers formed at least longer than the outer diameter of the one or other fastening member, the one or other fastening member is rotated by a very small rotational force, Fastened objects can be fastened. In particular, even when the outer diameter of the shaft or one or the other fastening member is short (thin), it is possible to easily apply a rotational force with a small force, and to apply torque to one or the other fastening member. No special tools are required.

  According to a fifth invention (invention according to claim 5), in any one of the first, second, third, or fourth inventions, the engaging recess with which the engaging member is engaged is the shaft. And the handle or handle lever has a predetermined length in the length direction of the shaft independently of the one or the other fastening member. The one or the other fastening member can be rotated at a position within the slide range.

  In this fifth invention, the engaging recess with which the engaging member engages is an engaging groove having a length in the same direction as the length direction of the shaft, and the handle or handle lever is It can slide over a predetermined slide range. The sliding direction is the length direction (axial direction) of the shaft, and the handle or the handle lever slides independently of the one or the other fastening member. In addition, even when the handle or the handle lever is slid in this manner, one or the other fastening member can be rotated by rotating the handle or handle lever. In other words, according to the fifth aspect of the present invention, the handle or handle lever is slid from the object to be fastened by sliding the handle or handle lever, or the separated handle or handle lever is used as the object to be fastened. It is possible to approach.

  Therefore, according to the fastening device according to the fifth aspect of the invention, the fastening object to be fastened by the one fastening member and the other fastening member may be rotated depending on the shape and the situation around the fastening member. There is an object to be fastened or other obstacle in the middle of the rotation trajectory of the handle or handle lever, the handle or handle lever collides with the obstacle, and the handle or handle lever continuously rotates through 360 degrees. Even when the operation cannot be performed, the object to be fastened can be reliably fastened by sliding the handle or the handle lever to avoid collision with the obstacle.

  According to a sixth invention (invention of claim 6), in the fifth invention, an outer periphery of the one or the other fastening member is provided within the slide range of the handle or handle lever. An endless recess having a width shorter than the length is formed in the circumferential direction of the one or the other fastening member, and the end of the engagement member is engaged with the engagement groove and the endless An engaging portion formed with a width shorter than the width of the recess is formed, and the handle or the handle lever is slid within the sliding range, so that the engaging portion can be moved into the endless recess. It is characterized by.

  In the sixth aspect of the 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 the other fastening member. The position where the endless recess is formed is either within the sliding range of the handle or handle lever. On the other hand, in the sixth aspect of the invention, an engaging portion having a width shorter than the width of the endless recess is formed at the tip of the engaging member. Therefore, for example, when the endless recess is formed on the end side of one or the other fastening member, the handle or the handle lever is slid in the length direction of the shaft, and the tip of the engagement member is When the engagement portion formed at the end reaches the position where the endless recess is formed, the handle or the handle lever is engaged with the engagement groove regardless of the forward rotation direction or the reverse rotation direction. The parts do not engage with each other (the rotational force does not act on one or the other fastening member), and the handle or the handle lever rotates idly. Thereafter, when the handle or the handle lever is further slid in the opposite direction, the engaging portion formed at the tip of the engaging member engages with the engaging groove, and one or the other fastening member can be rotated. . The endless recess may be formed at any position within the sliding range of the handle or the handle lever, and the number thereof may be plural.

  Therefore, according to the fastening device according to the sixth aspect of the present invention, in the process of forwardly rotating the handle or handle lever (any position in the rotation locus of the handle or handle lever), the object to be fastened or other obstacles When the handle or handle lever collides with the handle, the handle or handle lever is slid, the engaging portion of the engaging member is positioned in the endless recess, and once reversely rotated over a predetermined angle, The other fastening member can be rotated forward, and the one or other fastening member can always be fastened to a predetermined rotational torque.

  According to a seventh invention (invention according to claim 7), in any one of the first to sixth inventions, a cover portion constituting the handle or handle lever and the handle or handle lever are arranged. Caps formed of a material that can be elastically deformed in the direction of the one or the other fastening member are respectively attached to at least one of the one or the other fastening member that is not.

  According to the fastening device according to the seventh aspect of the present invention, even when an external force is applied to the cap, the cap is elastically deformed and the external force is absorbed. It is possible to effectively prevent the risk of damaging or distorting the object to be fastened by the fastening member, the shaft, and the fastening member.

  In addition, if the said cap is shape | molded by the raw material which can be elastically deformed, soft resin, such as rubber | gum, a silicone resin, and a urethane resin, can be used widely.

  According to an eighth invention (invention according to claim 8), in any one of the first to seventh inventions, the cover portion constituting the handle or the handle lever is provided with the one or the other by the action of an external force. A cap that moves in the direction of the fastening member is disposed, and a spring that biases the cap in a direction opposite to the direction of the one or the other fastening member is accommodated in the cap. .

  Even in the case of the fastening device according to the eighth invention, even when an external force acts on the cap, it is absorbed by the elastic deformation of the spring accommodated in the cap. It is possible to effectively prevent the risk of damaging or distorting one or the other fastening member, the shaft, and the fastened object fastened by the fastening member.

  Further, according to a ninth invention (invention according to claim 9), in any of the fifth and sixth inventions, a cap is attached to one end or the other end of the shaft, and in the cap, A return elastic member that biases the handle or the handle lever toward the other end or one end of the shaft so that the front end of the engagement member always returns to the position where it engages with the engagement recess or the engagement groove is accommodated. It is characterized by being made.

  In the fastening device according to the ninth aspect of the present invention, the handle or the handle lever is always slid on the other end side or one end side of the shaft, that is, as described above, by the return elastic member housed in the cap. It is energized to the previous state. Therefore, in the fastening device according to the ninth aspect, the handle or the handle lever is slid against the elastic force of the return elastic member. That is, according to the ninth aspect of the present invention, which is cited from the fifth aspect of the present invention, if there is an object to be fastened or other obstacle in the middle of the rotation trajectory of the handle or the handle lever, the operator The handle or handle lever (and one or the other is fastened while avoiding a collision with the obstacle by sliding the handle or handle lever and changing its position against the elastic force of the elastic member for use. The elastic member of the return elastic member is weakened by weakening the force that the operator separates or grips the finger from the handle or the handle lever at a position where the collision with the obstacle can be avoided. The handle or handle lever automatically returns to the position before sliding (original position) by force. Further, in the ninth invention which cites the sixth invention, there is a case where an object to be fastened or other obstacle exists in the middle of the rotation locus of the handle or the handle lever, and When the collision with the obstacle cannot be avoided by sliding alone, the handle or handle lever is slid against the elastic force of the return elastic member to engage the engagement member at the position where the endless recess is formed. When the operator rotates the handle lever in a reverse direction over a predetermined angle, and when the reverse rotation operation over the predetermined angle is completed, the operator releases the finger from the handle or the handle lever or weakens the gripping force. The handle or handle lever automatically returns to the previous position (original position) before sliding by the elastic force of the return elastic member. Or again handle or handle lever without sliding the handle lever to the original position can be the normal rotation operation.

  Therefore, according to the fastening device according to the ninth aspect of the present invention, when the handle or the handle lever cannot be rotated 360 degrees due to an obstacle existing in the middle of the rotation locus of the handle or the handle lever, the handle or the handle lever that has been slid once is Since the operation of returning the original position to the original position again becomes unnecessary, the work for fastening the article to be fastened becomes simpler and quicker. In particular, according to the ninth invention, in which the sixth invention is cited, when it is necessary to repeatedly perform a reverse rotation operation after a rotation operation over a predetermined angle, the operator performs a reverse rotation operation. Each time, the trouble of sliding the handle or handle lever to the original position can be omitted, which is very convenient.

  According to the fastening device according to the first invention (invention of claim 1), even if excessive torque acts on one or the other fastening member, the one or the other fastening member or The breakage of the screw formed on the shaft can be effectively prevented, and the breakage of the fastened object fastened to the one by the fastening member and the other fastening member can be effectively prevented. In particular, in the fastening device according to the first aspect of the present invention, the rotational torque for one or the other fastening member is different from that of the conventional fastening device, and the engagement recess formed on the outer peripheral surface of the one or the other fastening member. And is transmitted by an engagement member having a length in the radial direction of the shaft, and the engagement member constitutes a handle in a radial direction of one or the other fastening member or in a direction inclined from the radial direction. The fastening device is not extended in the length direction of the shaft because it is arranged in the rotary operation portion having the tip and is not arranged in the length direction of the shaft. In other words, the shaft and the fastened member are not adversely affected.

  Further, even in the case of the fastening device according to the second invention (the invention described in claim 2), when one or the other fastening member is rotated forward to fasten the article to be fastened, a predetermined rotational torque is applied. The one or the other fastening member can be rotated in a stable state until reaching the predetermined rotational torque, and when the predetermined rotational torque is reached, further forward rotation operation becomes impossible and the one or the other fastening member When the member is rotated in the reverse direction, the tip of the engaging member and the standing surface are securely engaged by the elastic force of the elastic member. It can be canceled.

  Further, even in the case of the fastening device according to the third invention (the invention according to claim 3), when one or the other fastening member is rotated forward to fasten the article to be fastened, a predetermined rotational torque is obtained. The one or the other fastening member can be rotated in a stable state until reaching the predetermined rotational torque, and when the predetermined rotational torque is reached, further forward rotation operation becomes impossible and the one or the other fastening member When the member is rotated in the reverse direction, the front end of the engaging member and the upright surface can be reliably engaged, and the fastened state of the fastened object that has been fastened until then can be released. In particular, since the third invention does not use an elastic member as in the second invention, the number of parts can be reduced and the weight of the entire fastening device can be reduced.

  In the fastening device according to the fourth invention (invention of claim 4), the rotation operation portion has a length in a radial direction of the one or the other fastening member or a direction inclined from the radial direction. In addition, since the length of the rotation operation part is one or a plurality of handle levers formed longer than the outer diameter of the one or the other fastening member, Alternatively, the other fastening member can be rotated to fasten the fastened object. In particular, even when the outer diameter of the shaft or one or the other fastening member is short (thin), it is possible to easily apply a rotational force with a small force, and to apply torque to one or the other fastening member. No special tools are required.

  Moreover, according to the fastening device which concerns on 5th invention (invention of Claim 5), the shape of the to-be-fastened object fastened by said one fastening member and the other fastening member, and the circumference | surroundings of this fastening member Depending on the situation, there is an object to be fastened or other obstacle in the middle of the rotation trajectory of the handle or handle lever to be rotated, the handle or handle lever collides with the obstacle, and the handle or handle lever is moved 360 degrees. Even when the rotation operation cannot be continued continuously, the object to be fastened can be securely fastened by sliding the handle or the handle lever to avoid the collision with the obstacle.

  Further, according to the fastening device according to the sixth aspect of the invention (invention of claim 6), in the process of rotating the handle or the handle lever forward (any position in the rotation locus of the handle or handle lever), When the handle or handle lever collides with an object to be fastened or other obstacles, the handle or handle lever is slid so that the engaging portion of the engaging member is positioned in the endless recess, and once reversely rotates over a predetermined angle. By doing so, one or the other fastening member can be further rotated forward, and the one or the other fastening member can be surely fastened to a predetermined rotational torque.

  Moreover, according to the fastening device which concerns on 7th invention (invention of Claim 7), or 8th invention (invention of Claim 8), even if it is a case where external force acts with respect to the said cap Since the cap or the spring accommodated in the cap is elastically deformed and the external force is absorbed, the one or the other fastening member, the shaft, or the fastened object fastened by the fastening member is used. The risk of damage or distortion can be effectively prevented.

  Further, according to the fastening device according to the ninth invention (the invention according to claim 9), when the handle or the handle lever cannot be rotated 360 degrees due to an obstacle present in the middle of the rotation locus of the handle or the handle lever, Since the operation of returning the slid handle or the handle lever to the original position again becomes unnecessary, the operation of fastening the object to be fastened becomes simpler and quicker. In particular, according to the ninth invention, in which the sixth invention is cited, when it is necessary to repeatedly perform a reverse rotation operation after a rotation operation over a predetermined angle, the operator performs a reverse rotation operation. Each time, the trouble of sliding the handle or handle lever to the original position can be omitted, which is very convenient.

It is a perspective view which shows the fastening device which concerns on 1st Embodiment with a to-be-fastened thing. It is sectional drawing which shows the fastening apparatus shown in FIG. It is sectional drawing which shows the internal structure of the fastening member shown in FIG. It is sectional drawing which shows the state which the front-end | tip of an engaging member is engaging 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 is rotated clockwise from the state shown in FIG. 4. FIG. 7 is a cross-sectional view illustrating a state after the handle lever is further rotated clockwise from the state illustrated 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 which shows the fastening device which concerns on 2nd Embodiment. It is sectional drawing which shows the fastening apparatus shown in FIG. It is sectional drawing which shows the structure remove | excluding the handle cover from the fastening apparatus shown in FIG. It is sectional drawing which expands and shows the structure inside the cover part which comprises the fastening apparatus shown in FIG. FIG. 13 is a cross-sectional view showing a state after the handle lever is slid rightward from the state shown in FIG. 12. It is a perspective view which shows the fastening device which concerns on 3rd Embodiment. It is a perspective view which shows the fastening device which concerns on 4th Embodiment.

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

  The fastening device according to the first embodiment is an application of the present invention to a bicycle fastening device disposed at the center of a front wheel or 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. 1, the front ends of the left and right forks F 1 and F 2 and the hub device H are respectively fastened. Is concluded. As shown in FIG. 2, the fastening device 1 includes a shaft 2 formed in a cylindrical shape from a metal material such as iron, and one fastening member 3 screwed to the right end (one end) side of the shaft 2. The other fastening member 4 screwed to the left end (other end) side of the shaft 2 is a constituent element.

  One screw 2 a to which the one fastening member 3 is screwed is threaded on the outer periphery on the right end side of the shaft 2, and the other fastening member 4 is screwed on the outer periphery on the left end side of the shaft 2. The other screw 2b to be attached is threaded. Note that, in the fastening device 1 according to the first embodiment, a shaft side that passes through the shaft 2 is located at a middle portion 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 is formed with a screw hole 3a in which a screw (reference numeral is omitted) screwed on one screw 2a formed on the shaft 2 is screwed on the inner periphery. 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 part that is gripped by the operator's fingers, and a number of anti-slip grooves (reference numerals are omitted) 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 one annular engagement claw (reference numeral is omitted) is formed on the inner periphery of the wall surface (reference numeral is omitted). In the cap mounting recess 3e, one protective cap 6 is detachably mounted to the one fastening member 3. This one protective cap 6 is integrally formed of a soft resin, the outer shape is formed in a substantially hemispherical shape, the inside is hollow, and the one annular engagement claw on the outer periphery. The other annular engagement claw (reference numeral is omitted) is formed. 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 inner diameter of the fastening member side through hole 3d is the same as the inner diameter of the shaft side through hole 2c, and one fastening pin 7 is provided in the fastening member side through hole 3d and the shaft side through hole 2c. The one fastening member 3 is fixed to the shaft 2. In addition, the left end surface on which the inner flange portion 3c is formed is a portion that contacts the right fork F2 that is the fastened object 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 which a screw (not shown) to be screwed to the other screw 2b is screwed on the inner periphery. Further, 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 rotation direction. Further, a reduced diameter portion 4c having a reduced outer diameter is formed on the right side of the other fastening member 4 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 where a distal end surface of an engagement member 11 described later is engaged, and a handle lever 10 described later is rotated forward (rotated clockwise in the drawing). As a result, the inclined surface 4e with which the engaging portion 11a at the tip of the engaging member 11 is engaged and the handle lever 10 are rotated in the reverse direction (rotated in the counterclockwise direction in the drawing). The upright surface 4f with which the engaging portion 11a at the tip end is engaged is continuous.

  A flange member 8 that contacts the left fork F1 is mounted on the right side of the other fastening member 4. The flange member 8 is formed at the center of the flange portion 8a formed in a disc shape, the 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 convex portion 8d formed on the inner peripheral surface of the cylindrical portion 8b and fitted into the fitting concave portion 4d. Therefore, as will be described later, when the other fastening member 4 is rotated forward and screwed to one end side of the shaft 2, the flange member 8 also moves to the one end side of the shaft 2 together with the other fastening member 4. To do. At this time, the flange portion 8 may be rotated along with the rotation of the other fastening member 4, or a slight clearance may be provided between the fitting concave portion 4d and the fitting convex portion 8d. It is also possible to employ a configuration in which the flange portion 8 moves in the axial direction of the shaft 2 without being rotated by rotation of the other fastening member 4.

  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 portion 10 a that covers the other fastening member 4 and a length extending from the cover portion 10 a in the radial direction of the other fastening member 4. And a single rotation operation unit 10b that is gripped and rotated by an operator's fingers. As shown in FIG. 3, the cover portion 10a is formed in a hollow shape, and the other fastening member 4 is positioned inside. The rotation operation portion 10b has a substantially rectangular shape. The engaging member 11 which consists of a shape | molded board is incorporated. As shown in FIG. 4, the rotation operation portion 10b in which the engagement member 11 is incorporated has a length in the radial direction of the cover portion 10a and accommodates the engagement member 11 therein. A rotation operation unit main body (reference numeral is omitted) in which a space 10c is formed, and a lid 13 that is fixed to the rotation operation unit main body via screws 12 and closes the accommodation space 10c. A recess (reference numeral is omitted) in which the head 12a of the screw 12 is accommodated is formed on the outer surface of the rotation operation unit main body, and extends from the center of the recess to the accommodation space 10c. A first insertion hole (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 lid body 13 is formed with a screw hole 13a into which the shaft portion 12b of the screw 12 is screwed. Therefore, the engaging member 11 formed in the plate shape and the lid body 13 are integrated with the rotation operation unit main body by the screw 12, and in this embodiment, the engaging member 11 11 is removable. As shown in FIG. 4, a curved portion 13b that is curved so as to be gradually separated from the distal end side of the engaging member 11 is formed on the distal end side of the lid 13, and the curved portion 13b Between the inner side and the distal end side of the engaging member 11, an allowable space 10d that allows elastic deformation of the engaging member 11 is formed as described later.

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

  Further, as shown in FIG. 3, an O-ring 15 that is externally inserted into the reduced diameter portion 4c is built in the cover portion 10a constituting the handle lever 10, and the cover portion 10a shown in FIG. The middle right side is closed by a cylindrical portion 8 b formed on the flange member 8. In addition, a spacer 16 is disposed in the cover portion 10a and on the left side of the other fastening member 4 in FIG. A ring member 17 is arranged. The shaft 2 is inserted in the center of the ring member 17 and has a larger diameter than the inner diameter of the cover portion 10a. For this reason, the ring member 17 is fitted on the inner periphery of the cover portion 10a. A ring-shaped recess (reference numeral is omitted) is formed. Further, the other protective cap 19 is detachably attached to the left side of the cover portion 10a constituting the handle lever 10, and an opening formed on the left side of the cover portion 10a by the other protective cap 19 is provided. It is blocked. The other protective cap 19 is made of the same material as the one protective cap mounted on the one fastening member 3 and formed into the same shape. One annular engagement claw (reference numeral is omitted). Is formed). In addition, the other annular engagement claw (a code | symbol is abbreviate | omitted) which engages with said one annular engagement claw is formed in the left inner periphery of the said cover part 10a.

  Hereinafter, with the fastening device 1 according to the first embodiment described above, a method of fastening the distal end sides of the left and right forks F1, F2 of the bicycle, which is the fastened object, and the hub device H, and the fastening state thereof are released. The effect of the fastening device 1 will be described while explaining the method.

  First, when the fastening object 1 is fastened by the fastening device 1, when the handle lever 10 shown in FIG. 4 is rotated forward (clockwise in FIG. 4), a plurality of engagements of the other fastening member 4 are engaged. Since any one of the joint grooves 4b (inclined surface 4e) and the engaging portion 11a of the engaging 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 and moves along the shaft 2 so as to approach the one fastening member 3. The other fastening member 4 is screwed together with the one fastening member 3 by the screwing of the other fastening member 4 accompanying the forward rotation operation of the handle lever 10, and the fastened object is fastened. When the object to be fastened is fastened (tightened) by the forward rotation operation of the handle lever 10, the resistance gradually increases, and the rotational 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 within the permissible space 10d while sliding on the inclined surface 4e. Further, when the handle lever 10 is rotated forward, as shown in FIG. 7, the engaging portion 4a of the engaging member 11 has a specific engagement with the engaging portion 11a of the engaging member 11 until then. Riding on the outer peripheral surface of the other fastening member 4 formed between the engaging groove 4b and the other engaging groove 4b positioned in the clockwise direction in FIG. 6 from the position where the specific engaging groove 4b is formed, As shown in FIG. 8, the engaging portion 11a eventually reaches the other engaging groove 4b and is elastically deformed until then, as shown in FIG. Return to the state. That is, when the object to be fastened is fastened (tightened) by the forward rotation operation of the handle lever 10 and the rotational torque of the other fastening member 4 reaches a predetermined torque, FIG. 6 to FIG. The process shown in FIG. 8 is repeated, and the other fastening member 4 does not rotate any more, and the handle lever 10 rotates idly. Thus, since the resistance is lower in the state where the handle lever 10 is idle than in the state where the rotational torque is acting on the other fastening member 4, the operator can hold the idle state with his / her fingers. At the same time, in the process in which the elastic deformation of the engaging member 11 is repeated, a collision sound is generated between the engaging portion 11a of the engaging member 11 and the inclined surface 4e forming the engaging groove 4b. The worker can also detect the idle state by hearing.

  On the other hand, the fastening state by the one fastening member 3 and the other fastening member 4 is used for the purpose of repairing or replacing the fastened object such as the left fork F1 or the hub device H or repairing or replacing the tire. When canceling, the handle lever 10 is reversely rotated. By such a reverse rotation 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. As a result, the other fastening member 4 is connected to the shaft. 2 and the distance from the one fastening member 3 increases, and the fastened state of the fastened object that has been fastened is released.

  As described above, according to the fastening device 1 according to the first embodiment, according to each of the above configurations, when the other fastening member 4 reaches a predetermined rotational torque, the handle lever 10 is idled. Since it cannot be fastened any more (having a torque limit function), excessive torque is applied to the article to be fastened or screwed into the shaft 2 or the other fastening member 4 It is possible to effectively prevent the screw from being damaged. In particular, in the fastening device 1, the handle lever 10 that is rotated by the operator is incorporated in the fastening device 1 (is an integral type), and thus it is not necessary to use a special tool. Since each member having the torque limit function is 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. Moreover, since the rotation operation part 10b which comprises the said handle lever 10 has length in the radial direction of the said shaft 2 or the other fastening member 4, it can finish fastening operation | work simply by a very small rotational torque. Moreover, since the one and the other protective caps 6 and 19 are attached to the fastening device 1, when a bicycle (not shown) falls over the shaft 2 and the one and the other fastening members 3 and 4. Thus, even if some external force is applied, 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 adverse effects such as impact on the object to be fastened and deformation or distortion associated therewith. In the fastening device 1 according to the first embodiment, the engagement member 11 is structured to avoid excessive rotational torque from acting on the other fastening member 4 due to elastic deformation of the engagement member 11. Since the member 11 is fixed to the accommodation space 10c via the screw 12, the member 11 can be replaced with an engaging member 11 having different elastic deformation and deteriorated by long-term use. Even when it becomes necessary to replace the engaging member 11, it is possible to replace it with a new engaging member 11.

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

  A bicycle fastening device (hereinafter referred to as a fastening device) 21 according to the second embodiment mainly changes the configuration of the torque limit mechanism to a different configuration, and enables the handle lever to slide. is there. Accordingly, while the common members are described using the same reference numerals as those used in the fastening device 1 according to the first embodiment, even if the members are the same reference numerals, different reference numerals are used for different configurations. 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 the other fastening screwed to the other end of the shaft 2. A member 4 (see FIG. 10) and a handle lever 10 that covers the other fastening member 4 and rotates the other fastening member 4 are provided.

  As shown in FIG. 10 or FIG. 11, the shaft 2 is threaded with one screw 2a to 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 threaded. In the fastening device 21 according to the second embodiment, a shaft that penetrates the shaft 2 is located at a position in the middle of the other end 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 is formed with a screw hole 3a at the center, and 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. Has been. A cap mounting recess 3e is formed on one end surface of the one fastening member 3, and one annular engagement is provided on the inner periphery of the wall surface (reference numeral is omitted) of the cap mounting recess 3e. A claw (reference numeral is omitted) is formed, and one protective cap 6 is detachably attached to the one fastening member 3 in the cap-mounting 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 in the center of the one protective cap 6.

  Further, as shown in FIG. 11 or FIG. 12, the other fastening member 4 has a screw (reference numeral omitted) that is screwed to the other screw 2b formed in the shaft 2 at the center. A plurality of engagement grooves 4b having a length in the same direction as the axial direction of the shaft 2 are formed in the circumferential direction of the other fastening member 4, respectively. It is formed side by side in parallel. Further, 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 the circumferential direction of the other fastening member 4, and this first groove The engagement groove 4b is divided into left and right with the endless recess 4g interposed therebetween. Further, a left reduced diameter portion 4h is formed on the left outer periphery (the other end outer periphery of the other engagement member 4) of the left engagement groove 4b (shown in FIG. 12). In the fastening member 21, the first endless recess 4 g and the left reduced diameter portion 4 h have the same width. Also, a right-side reduced diameter portion 4c having a reduced outer diameter is formed on the right side of the other fastening member 4 where the plurality of engagement grooves 4b are 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 where a distal end surface of an engagement member 31 to be described later is engaged. Like the engagement member 11 described above, the handle lever 10 to be described later is a normal position. The inclined surface 4e that engages with the engaging portion 31a at the distal end of the engaging member 31 by rotating, and the engaging portion 31a at the distal end of the engaging member 31 by rotating the handle lever 10 reversely. The rising surface 4f to be engaged is continuous. The other fastening member 4 is formed with a through hole 4j that penetrates 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. Since the flange member 8 is the same as that constituting the fastening device 1 according to the first embodiment, the description thereof is omitted. A handle lever 10 is attached to the other fastening member 4. As shown in FIG. 9 or 10, the handle lever 10 has a cover portion 10a that covers the other fastening member 4, and a length from the cover portion 10a in the radial direction of the other fastening member 4. And a single rotary operation unit 10b that is held and rotated by an operator's fingers. The cover portion 10a is formed in a hollow shape, and the other fastening member 4 is located inside. The rotation operation unit 10b includes a first storage space 10c and a second storage space 10e communicating with the first storage space 10c in series from the proximal end side to the distal end side of the rotation operation unit 10b. It is formed in the state. The first accommodation space 10c contains an engagement member 31 therein and is closed by a lid body 13. The lid body 13 is fixed by screws 12 shown in FIG. Further, as shown in FIG. 10, the second accommodation space 10e is formed in a columnar shape from the tip of the rotation operation portion 10b to the first accommodation space 10c side. One screw groove (reference numeral is omitted) is threaded on the inner peripheral surface of the housing space 10e. The second housing space 10e is screwed with an elastic member housing member 25 having a spherical body 24 rotatably supported at the tip. A cylindrical spring accommodating space 25a is formed inside the elastic member accommodating member 25, and a pressing spring 26 as an elastic member whose tip is in contact with the spherical body 24 is accommodated in the spring accommodating space 25a. Has been. The distal end surface of the elastic member housing member 25 is exposed to the outside, and a turning operation recess 25b into which a distal end of a tool (not shown) such as a wrench is inserted is formed at the center of the distal end surface. Therefore, by inserting the tip of the tool into the turning operation recess 25b and rotating the tool, the elastic member housing member 25 and the spherical body 24 are moved in the direction of the other fastening member 4 or in the opposite direction. Or screwed back.

  Further, as described above, the engaging member 31 constituting the fastening device 21 according to the second embodiment is housed in the first housing space 10c, and the In the 1st accommodation space 10c, it accommodates in the said other fastening member 4 direction and its reverse direction so that sliding is possible. And as shown in FIG. 11 or FIG. 12, the engaging member 31 which comprises this fastening apparatus 21 is formed with two engaging parts 31a and 31a engaged with the engaging grooves 4b and 4b at the tip. A notch 31b is formed between the two engaging portions 31a and 31a. The width of the two engaging portions 31a, 31a is formed to be substantially the same as the width of the engaging grooves 4b, 4b, and the first endless recess 4g formed on the outer periphery of the other fastening member 4. Or a width slightly shorter than the width of the left reduced diameter portion 4h. A long hole 31c is formed in the center of the engaging member 31 through which the screw 12 (the shaft portion 12b) 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 the length is at least longer than the sliding length in which the engaging member 31 slides.

  Further, 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 10a constituting the handle lever 10 with the other fastening member 4. An annular convex portion 10g that is slidably in contact with the outer peripheral surface of the right-side reduced diameter portion 4c is formed (see FIG. 10). Then, an O-ring 15 is externally inserted into the middle portion of the right-side reduced diameter portion 4c outside the position where the annular convex portion 10g is disposed, and the right side of the cover portion 10a in FIG. Is closed by fitting the tubular portion 8b formed on the flange member 8 to the fitting convex portion 8d. In addition, a spacer 16 is disposed in the cover portion 10a and on the left side of the other fastening member 4 in FIG. A ring member 17 is arranged. The shaft 2 is inserted in the center of the ring member 17 and has a larger diameter than the inner diameter of the cover portion 10a. For this reason, the ring member 17 is fitted on the inner periphery of the cover portion 10a. A ring-shaped recess (reference numeral is omitted) is formed. Furthermore, 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 portion 10a constituting the handle lever 10, and the opening formed on the left side of the cover portion 10a is closed by the other protective cap 19. ing.

  And as for the other protective cap 19 which comprises the fastening apparatus 21 which concerns on this 2nd Embodiment, the whole shape is shape | molded by the substantially hemispherical shape, as expanded and shown in FIG. That is, the other protective cap 19 is provided with a hemispherical surface 19a bulging outward, and on the opposite side of the hemispherical surface 19a is located on the other fastening member 4 side and the outer shape is circular. The inner circular end surface 19b is formed on the outer side of the inner circular end surface 19b and on the outer side of the inner end surface 19b and on the left side of the position where the inner circular end surface 19b is formed. An outer circular end surface 19c having a circular shape is provided. 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 surface 19b. Further, the other protective cap 19 has an annular recess 19f formed inside the outer circular end surface 19c. The annular recess 19f surrounds the large-diameter hole 19d and the small-diameter hole 19e on the outer side of the formation position of the large-diameter hole 19d and the small-diameter hole 19e with a cylindrical portion (reference numeral omitted) therebetween. Is formed. The washer 18, the outer circular end surface 19c, and the annular recess 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. At the center of the head 29a, a rotation operation hole 29c is formed in which a tip of a tool (not shown) is inserted and locked to the tool, and the fixing bolt 29 is screwed or retreated 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 recess 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, the operator can hold the rotary operation unit 10 b with his / her fingers. When the handle lever 10 is slid in the direction away from the one fastening member 3 (left side in FIG. 10) while gripping, the front end surface (inner circumference) of the annular convex portion 10g formed in the cover portion 10a. The elastic member for return accommodated in the annular recess 19f of the other protective cap 19 while the surface) is slidably in contact with the outer peripheral surface of the right-side reduced diameter portion 4c formed on the other fastening member 4 and guided. It is configured to slide in the above direction against the elastic force of 30. Further, by the sliding operation of the handle lever 10, the washer 18 compresses the return elastic member 30, and eventually comes into contact with the outer circular end surface 19c, and the washer 18 comes into contact with the outer circular end surface 19c. Therefore, the handle lever 10 is not slid any more.

  Therefore, hereinafter, the fastening device 21 according to the second embodiment described above is used to fasten the distal ends of the left and right forks F1, F2 of the bicycle, which is the fastened object, and the hub device H, and the fastening state is released. While explaining the method to do, the effect of this fastening device 21 is demonstrated.

  First, when the fastening object 21 is fastened by the fastening device 21, the handle lever 10 is rotated forward in the same manner as the fastening device 1 according to the first embodiment. By the forward rotation operation of the handle lever 10, a plurality of engagement grooves 4 b and 4 b formed in the other fastening member 4 and the engagement member 11 housed in the rotation operation portion 10 b constituting the handle lever 10. Since the engaging portions 31a and 31a 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 fastening member The fastening member 3 jointly fastens the article to be fastened. When the object to be fastened is fastened (tightened) by the forward rotation operation of the handle lever 10, the resistance gradually increases, and the rotational 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 is fastened to the other end of the engaging member 31 against the elastic force of the pressing spring 26 while slidingly contacting the inclined surface 4e. It is slid in a direction away from the member 4. Further, when the handle lever 10 is rotated forward, the engaging portion 4a of the engaging member 31 and the specific engaging groove 4b that has been engaged with the engaging portion 31a of the engaging member 31 until then are specified. Riding on the outer peripheral surface 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 rotation direction of the handle lever 10 and slidingly contacting the outer peripheral surface, eventually The engaging portion 31a reaches the inside of the other engaging groove 4b, and the distal end side of the engaging member 31 that has been slid so far returns to the original state. That is, when the object to be fastened is fastened (tightened) by the forward rotation operation of the handle lever 10 and the rotational torque of the other fastening member 4 reaches a predetermined torque, the other of the other fastening members 4 is further tightened. The handle lever 10 rotates idly (idling) without the fastening member 4 rotating. Thus, since the resistance is lower in the state where the handle lever 10 is idle than in the state where the rotational torque is acting on the other fastening member 4, the operator can hold the idle state with his / her fingers. At the same time as it can be sensed, in the process in which the sliding of the engaging member 31 is repeated, a collision sound is generated between the engaging portion 31a of the engaging member 31 and the engaging groove 4b, so that the operator is idle. The state can also be sensed audibly.

  When the handle lever 10 is operated to rotate forward, if the handle lever 10 is slid in a direction away from the one fastening member 3, the handle lever 10 as a whole resists the elastic force of the return elastic member 30. When the handle lever 10 is reversely rotated when the washer 18 comes into contact with the outer circular end surface 19c, the other fastening member 4 does not rotate forward and only the handle lever 10 is rotated. Is idle. Therefore, when there is an obstacle (not shown) during the forward rotation operation of the handle lever 10 (in the middle of the rotation locus of the handle lever 10) and the handle lever 10 cannot be rotated forward 360 degrees, the handle lever 10 is idled. When the handle lever 10 that has been gripped until then is released or the force is released, the handle lever 10 is slid by the elastic force of the return elastic member 30. Return to the previous state. In this way, when the handle lever 10 is returned to the normal position, the other fastening member 4 and the shaft 2 can be forwardly rotated, and the fastened object can be tightened.

  On the other hand, the fastening state by the one fastening member 3 and the other fastening member 4 is used for the purpose of repairing or replacing the fastened object such as the left fork F1 or the hub device H or repairing or replacing the tire. When canceling, the handle lever 10 is reversely rotated. By rotating the handle lever 10 in the reverse direction, the engaging portions 31a and 31a formed on the engaging member 31 are engaged with the upright surface 4f forming the engaging groove 4b. As a result, the other fastening member is engaged. 4 and the one fastening member 3 are separated from each other, and the fastened state of the fastened object that has been fastened until then is released.

  Thus, according to the fastening device 21 according to the second embodiment, as in the fastening device 1 according to the first embodiment described above, the other fastening member has the above-described configuration. When 4 reaches a predetermined rotational torque, the handle lever 10 idles and cannot be fastened any more (having a torque limit function), so excessive torque acts on the fastened object. It is possible to effectively prevent the screw screwed into the shaft 2 or the screw screwed into the other fastening member 4 from being damaged. Further, also in the fastening device 21, the handle lever 10 that is rotated by the operator is incorporated in the fastening device 21 (is an integral type), so that it is not necessary to use a special tool. Since each member having the torque limit function is 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. Moreover, since the rotation operation part 10b which comprises the said handle lever 10 has length in the radial direction of the said shaft 2 or the other fastening member 4, it can finish fastening operation | work simply by a very small rotational 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 operated not only during the forward rotation operation but also during the reverse rotation operation. When an obstacle exists in the middle of the rotation trajectory of 10, the handle lever 10 can be rotated after being slid to a position where it does not collide with the obstacle. Still further, by sliding the handle lever 10 until the washer 18 comes into contact with the outer circular end surface 19c, each engagement member 31a, 31a is made to be the first endless formed on the other fastening member 4. Since it moves to the formation position of the recessed part 4g and the left side reduced diameter part 4h, the handle lever 10 can be made to idle (idle). As a result, even if there is an obstacle in the middle of the rotation trajectory of the handle lever 10 and the handle lever 10 cannot be continuously rotated through 360 degrees even if the handle lever 10 is slid, By repeating the operation of rotating the handle lever 10 in the reverse rotation direction or the normal rotation direction over a predetermined angle and then returning the handle lever 10 to the position before sliding, and then 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 in the middle of the rotation locus of the handle lever 10, it is once slid. It is not necessary to perform the sliding operation each time before the handle lever 10 is slid.

  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 disposed in the other protective cap 19 as shown in FIG. When the bicycle (not shown) falls or the hemispherical surface 19a of the other protective cap 19 bulging outward collides with some obstacle because it is always biased toward the other fastening member 4. Even so, 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 becomes possible to further protect the object to be fastened. 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 sliding, and an object to be fastened due to a collision with an external force. It fulfills the protective function simultaneously

  Further, in the fastening devices 1 and 21 according to each of the above embodiments, the rotation operation unit 10b constituting the handle lever 10 is a single unit, but the rotation operation unit constituting the present invention is, for example, FIG. As shown in FIG. 15, it may be a bicycle fastening device (hereinafter referred to as a fastening device) 41 in which the first and second rotation operation portions 42b and 42c are formed, and 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, and 52d are formed may be used. The fastening device 41 shown in FIG. 14 is according to the third embodiment, and the fastening device 51 shown in FIG. 15 is according to the fourth embodiment. The fastening device 41 includes the above-described shaft 2, one fastening member 3 that is screwed to one end of the shaft 2, and a cover that is screwed to the other end of the shaft 2 and forms a handle lever 42. The other fastening member (not shown) located in the portion 42a is a component. And the same component as the fastening member 21 etc. which concern on the said 2nd Embodiment is arrange | positioned in the said cover part 42a. The handle lever 42 is formed with a first rotation operation portion 42b extending from the outer periphery of the cover portion 42a in the axial direction of the shaft 2, and the first rotation operation portion 42b extends. A second rotation operation portion 42c is formed on the side opposite to the protruding side. In the first and second rotation operation portions 42b and 42c, the engaging members that exhibit the torque limit function described in the fastening devices 1 and 21 according to the first or second embodiment are accommodated. Yes. Further, as shown in FIG. 15, the fastening device 51 according to the fourth embodiment includes the shaft 2, one fastening member 3 screwed to one end of the shaft 2, and the shaft 2. The other fastening member (not shown) located in the cover portion 52 a that is screwed to the end side and constitutes the handle lever 52 is a constituent element. And the same component as the fastening member 21 etc. which concern on the said 2nd Embodiment is arrange | positioned in the said cover part 52a. On the outer periphery of the cover portion 52a formed on the handle lever 52, first to third rotation operation portions 52b, 52c, and 52d formed in the same shape are arranged in the circumferential direction of the cover portion 52a. Are formed at equiangular intervals. And in these 1st thru | or 3rd rotation operation part 52b, 52c, 52d, the engagement member which exhibits the torque limit function demonstrated in the fastening devices 1 and 21 which concern on the said 1st or 2nd embodiment. Is housed.

  According to the fastening devices 41 and 51 according to the third or fourth embodiment, when the handle levers 42 and 52 are rotated, the first and / or second rotation operation portions 42b and 42c. Alternatively, since all or part of the first to third rotation operation parts 52b, 52c, 52d can be rotated while being gripped with fingers, the object to be fastened can be fastened with a simpler and smaller rotational force. At the same time, the fastened state of the fastened object can be released. In addition, like the fastening devices 41 and 51 according to the third or fourth embodiment, when a plurality of rotation operation parts (reference numerals are omitted) constituting the handle levers 42 and 52 are formed, these rotations are performed. A disk-shaped flat plate (not shown) is provided on the back side (fastened object side) of the operation portion, and each rotation operation portion is integrally formed on the outer surface of the flat plate (the surface opposite to the fastened object side). It may be. 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 object to be fastened and the handle levers 42, 52 is effectively obtained. Can be prevented.

  The fastening device 1 according to the first embodiment and the fastening device 21 according to the second embodiment described above are the same as those described at the beginning. The present invention is applied to a bicycle fastening device disposed on the bicycle. However, the present invention is not only applied to a bicycle fastening device, but also one fastening screwed or fixed to one end side of a shaft. A basic structure in which a member and the other fastening member fixed or screwed to the other end side of the shaft are provided, and an object to be fastened is fastened by the one fastening member and the other fastening member. If it has, it may be applied to other fastening devices. Further, 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. Further, the rotation 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 member 3, 4, but is inclined from the radial direction of the one or the other fastening member 3, 4. It may have a tip in the direction. In other words, the rotation operation portion 10b constituting the present invention has not only the radial component of the one or the other fastening member 3, 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 of the above-described embodiments and the fastening device 21 according to the second embodiment, an example of the engagement recess constituting the present invention is used, and one or the other fastening member 3, Although the description has been given of the case where the engagement groove is formed on the outer periphery of the engagement groove 4, the engagement recess constituting the present invention is not necessarily configured as the engagement groove, but 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 side) Reduced diameter part 4e Inclined surface 4f Standing surface 4g First endless recessed part 6 One protective cap 10 Handle Lever 10a Cover portion 10b Rotation operation portion 10c First accommodation space 10d Allowable space 11 Engaging member 11a Engaging portion 19 Other protective cap 21 Bicycle fastening device 26 Press spring 30 Return elastic member 31 Engaging member 31a Engagement Part 41 Bicycle fastening device 42 Handle lever 42a Cover part 42b First rotation operation part 42c Second rotation operation part 51 Bicycle fastening device 52a Cover part 52b First rotation operation part 52c Second rotation operation part 52d First 3 rotation operation part

Claims (9)

A shaft in which one fastening member is fixed or screwed to one end side, and the other fastening member is screwed or fixed to the other end side;
A cover portion covering at least a part of the outer periphery of the one fastening member or the other fastening member; and a rotation operation portion having a tip in a radial direction of the one or other fastening member or a direction inclined from the radial direction. And a handle,
On the outer peripheral surface of the one or other fastening member, a plurality of engaging recesses are formed at equal intervals in the circumferential direction of the one or other fastening member, respectively.
In the rotation operation portion, the tip engages with the engagement recess, and when the rotational force of the one or the other fastening member reaches a predetermined rotation torque, the rotation operation portion moves away from the engagement recess. A fastening device comprising an engagement member that is moved or elastically deformed at a distal end side to release the engagement state with the engagement recess. The engagement recess with which the distal end of the engagement member engages is a case where the one or other fastening member is rotated forward and the rotational force of the one or other fastening member is a predetermined rotational torque. In this case, when the one or the other fastening member is rotated in the reverse direction and the inclined surface that releases the engaging member in the direction away from the engaging recess, the tip of the engaging member Each of the upstanding surfaces to be engaged is formed,
In the rotation operation portion constituting the handle, the engagement member is accommodated and an accommodation space for guiding the movement of the engagement member is formed. In the rotation operation portion, the tip of the engagement member is provided. The fastening device according to claim 1, wherein an elastic member that presses the engagement member so as to engage with the engagement recess is disposed. When the one or the other fastening member is rotated in the normal rotation direction, the rotational force of the one or the other fastening member is predetermined in the engagement recess to which the tip of the engagement member is engaged. When the rotational torque reaches the rotational torque of the engagement member, the inclined surface that elastically deforms the engagement member, and when the one or the other fastening member is rotated in the reverse rotation direction, the engagement member is engaged with the tip of the engagement member. The mating standing surfaces are formed respectively,
The fastening device according to claim 1, wherein an allowance space that allows elastic deformation of the engagement member is formed on an inner side from the cover portion constituting the handle to the rotation operation portion.   The rotation operation part has a length in a radial direction of the one or other fastening member or a direction inclined from the radial direction, and the length of the rotation operation part is at least the one or other fastening member. 4. The fastening device according to claim 1, wherein the fastening device is one or a plurality of handle levers formed longer than the outer diameter of the handle lever. The engaging recess with which the engaging member engages is an engaging groove having a length in the same direction as the length direction of the shaft,
The handle or the handle lever is slidable over a predetermined slide range in the longitudinal direction of the shaft independently of the one or other fastening member, and the handle or the handle lever is positioned at a position within the slide range. The fastening device according to any one of claims 1, 2, 3, and 4, wherein one or the other fastening member can be rotated. On the outer periphery of the one or other fastening member, an endless recess having a width shorter than the length of the sliding range within the sliding range of the handle or handle lever is a circumferential direction of the one or other fastening member. As it is formed,
At the tip of the engaging member, an engaging portion is formed that engages with the engaging groove and has a width shorter than the width of the endless recess,
The fastening device according to claim 5, wherein the engagement portion is movable into the endless recess when the handle or the handle lever is slid within the slide range.   At least one of the cover portion constituting the handle or handle lever and the one or other fastening member on which the handle or handle lever is not disposed can be elastically deformed in the direction of the one or other fastening member. The fastening device according to any one of claims 1, 2, 3, 4, 5 and 6, wherein caps formed of a material are respectively attached.   A cap that moves in the direction of the one or the other fastening member by the action of an external force is disposed on the cover portion that constitutes the handle or the handle lever, and the cap is placed in the direction of the one or the other fastening member. The fastening device according to any one of claims 1, 2, 3, 4, 5, 6 and 7, wherein a spring urging in a reverse direction is accommodated. A cap is attached to one end or the other end of the shaft, and the handle or the handle is disposed in the cap so that the front end of the engagement member always returns to a position where it engages with the engagement recess or the engagement groove. 7. The fastening device according to claim 5, further comprising a return elastic member that urges the lever toward the other end or one end of the shaft.