JP2012131005A - Fastener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fastener capable of easily performing the fastening work.SOLUTION: A cross-tip screwdriver 100 which fastens a cross-head screw by rotating the cross-head screw includes: a blade edge section 2 to be engaged to the cross-head screw; and a grip portion 1 fixed to a grip side of the blade edge section 2 and having a hollow part 11. The blade edge section 2 includes: an inner-diameter side part 21; and an outer diameter side part 22 provided to surround the outer periphery of the inner-diameter side part 21. The outer-diameter side part 22 can move inside the hollow part 11 along a rotary axis R between a blade edge side position and a grip side position. In the state that the outer-diameter side part 22 is positioned on the blade edge side, the blade edge section 2 can fasten the cross-head screw of one size. In the state that the outer-diameter side part 22 is positioned on the grip side, the blade edge section 2 can fasten the cross-head screw of other size different from the one size.

Description

  The present invention relates to a fastener, and more particularly to a fastener that is fastened by rotating a fastening member.

  As a method of fixing the object, there is a method of fastening a fastening member such as a screw, a bolt, or a hex nut. When fastening these fastening members, a fastener suitable for the shape (type) of the fastening member such as a plus driver, a minus driver, a screw driver, a socket wrench, or a hexagon wrench is used. In addition, there are various sizes of fastening members of one shape, and when it is necessary to fasten a plurality of sizes of fastening members, a fastener is prepared for each fastening member size. The fasteners must be exchanged and used each time according to the size. This is because if the fastening member is forcibly fastened using a fastener that does not match the size, the fastening member may be damaged. Therefore, the conventional fastener has a problem that the fastening operation is complicated.

  Here, Patent Document 1 below proposes a drill chuck mechanism for an electric driver that can insert and insert a drill having a different diameter. In the drill chuck mechanism disclosed in Patent Document 1, a driver bit insertion / removal mechanism is attached to an electric driver having a driver bit fixed thereto, and a driver bit of a type different from the driver bit fixed to the electric driver is a driver. It is attached to the bit insertion / removal mechanism.

JP 2005-288680 A

  However, even in the technique of Patent Document 1, it is necessary to prepare a driver bit for each screw size and replace the driver bit each time according to the screw size, and the complexity of the fastening work cannot be eliminated. It was.

  This invention solves the said subject, The objective is to provide the fastener which can perform a fastening operation | work easily.

  A fastener according to one aspect of the present invention is a fastener that is fastened by rotating a fastening member, the first portion being engageable with the fastening member, and being fixed to the first portion and hollow. A first portion includes an inner diameter side portion and an outer diameter side portion provided so as to surround the outer periphery of the inner diameter side portion, and the inner diameter side or the outer diameter side portion is , A rotation axis for rotating the fastening member between the first position relatively far from the second part and the second position relatively near the second part. The first portion can be fastened with a fastening member of one size, with the inner diameter side or the outer diameter side portion being in the first position, and the inner diameter side or the outer diameter side. With the part in the second position, the first part has a fastening member of another size different from the one size. It can be sintering.

  Preferably, in the fastener, the inner diameter side and the outer diameter side portion can constitute one engaging portion that can be engaged with the fastening member.

  Preferably, in the fastener described above, the outer diameter side portion is in the first position, the first portion is a relatively large size groove, and a minus groove, a plus groove, and a hexagonal groove. A fastening member having at least one of the grooves can be fastened, and the first portion is a relatively small size groove in a state where the outer diameter side portion is in the second position, and a minus groove, plus A fastening member having at least one of a groove and a hexagonal groove can be fastened.

  In the above fastener, preferably, the inner diameter side portion is in the first position, the first portion is capable of fastening a relatively small hex nut, and the inner diameter side portion is in the second position. Thus, the first portion can be tightened with a relatively large hexagon nut.

  Preferably, in the above fastener, an urging member that urges the inner diameter side or outer diameter side portion relatively far from the second portion and the urging force of the urging member by protruding into the hollow portion. And a fixing member capable of fixing the position of the inner diameter side or the outer diameter side portion.

  ADVANTAGE OF THE INVENTION According to this invention, the fastener which can perform a fastening operation | work easily can be provided.

It is a front view which shows the structure of the plus driver in the 1st Embodiment of this invention. It is sectional drawing along the II-II line of FIG. It is an expansion perspective view of the engaging part of FIG. FIG. 3 is a front view showing a state in which the outer diameter side portion is in the position on the handle side in the plus driver according to the first embodiment of the present invention. It is sectional drawing along the VV line in FIG. It is a perspective view which shows the structure of a part of plug wrench in the 2nd Embodiment of this invention. It is sectional drawing along the VII-VII line of FIG. In the plug wrench in the 2nd Embodiment of this invention, it is a perspective view which shows the state which has an inner diameter side part in the position of a handle side. It is sectional drawing along the IX-IX line in FIG. It is a perspective view which shows the structure of the minus driver in other embodiment of this invention. It is a perspective view which shows the structure of the hexagon wrench in other embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a front view showing a configuration of a plus driver according to the first embodiment of the present invention. In the present embodiment, the left side in FIG. 1 may be referred to as the cutting edge side, and the right side in FIG. 1 may be referred to as the handle side.

  Referring to FIG. 1, a plus driver 100 as a fastener in the present embodiment includes a gripping portion 1 made of, for example, resin and a blade edge portion 2 made of, for example, steel. The blade edge portion 2 has, for example, a bar shape, and the grip portion 1 is fixed to the handle side end portion of the blade edge portion 2. The blade edge portion 2 has an engagement portion 3 that can be engaged with a plus screw (a fastening member having a plus groove) (not shown) at an edge portion on the blade edge side. The user of the Phillips screwdriver 100 holds the grip portion 1 with his hand and engages the Phillips screw with the engagement portion 3 to rotate. Thereby, a plus screw is fastened and an object is fixed by the plus screw.

  FIG. 2 is a cross-sectional view taken along the line II-II in FIG.

  With reference to FIG. 1 and FIG. 2, the grip portion 1 includes a hollow portion 11. The hollow part 11 has a shape in which the blade edge side is released to the outside.

  The blade edge portion 2 includes an inner diameter side portion 21, an outer diameter side portion 22, a biasing member 23, and a fixing member 24. The inner diameter side portion 21 has a rod-like shape, and is fixed to the grip portion 1 in a state where the handle side end portion is inserted into the hollow portion 11. The outer diameter side portion 22 has a cylindrical shape and surrounds the outer periphery of the inner diameter side portion 21. The handle side end of the outer diameter side portion 22 is inserted into the hollow portion 11. The outer diameter side portion 22 is movable in the hollow portion 11 along the rotation axis R when the plus screw is rotated. FIGS. 1 and 2 show a state in which the outer diameter side portion 22 is in a position on the blade edge side (a side far from the gripping portion 1). Hereinafter, the state of FIGS. It may be referred to as a state where the radial side portion is at the position on the blade edge side.

  The urging member 23 is made of an elastic body such as a spring, for example, and is provided so as to surround the inner diameter side portion 21 in the hollow portion 11. The handle side end of the urging member 23 is fixed to the wall surface 12 of the hollow portion 11, and the blade edge side end of the urging member 23 is fixed to the handle side end of the outer diameter side portion 22. In a state where the outer diameter side portion 22 is in the position on the blade edge side, the urging member 23 is in a natural length state, and no urging force is generated from the urging member 23.

  A hole 13 is provided on the outer periphery of the grip portion 1, and a fixing member 24 is disposed in the hole 13 so as to be movable in a direction perpendicular to the rotation axis R (vertical direction in FIG. 1). A groove 25 is provided at a position corresponding to the fixing member 24 on the outer periphery of the inner diameter side portion 21, and a hole 26 reaching the inner diameter side portion 21 is provided at a predetermined position of the outer diameter side portion 22. The fixing member 24 protrudes into the hollow portion 11 and engages with the groove 25 and the hole 26, thereby fixing the position of the outer diameter side portion 22. The function of the fixing member 24 will be described later.

  FIG. 3 is an enlarged perspective view of the engaging portion of FIG.

  With reference to FIG. 3, the engaging portion 3 has a plurality of protrusions 31 and a plurality of grooves 32. The protruding portions 31 and the groove portions 32 are alternately provided along the outer periphery of the blade edge portion 2. In a state where the outer diameter side portion 22 is located at the cutting edge side, the inner diameter side portion 21 and the outer diameter side portion 22 are flush with each other, and the inner diameter side portion 21 and the outer diameter side portion 22 constitute the engaging portion 3. The The engaging portion 3 has a shape corresponding to a large size plus groove so that a large size plus screw can be rotated and fastened.

  4 and 5 are views showing a state in which the outer diameter side portion is in the position on the handle side in the plus driver according to the first embodiment of the present invention. 4 is a front view, and FIG. 5 is a cross-sectional view taken along line VV in FIG.

  Referring to FIGS. 4 and 5, the user can move outer diameter side portion 22 to the position on the handle side (side relatively close to grip portion 1) by pushing outer diameter side portion 22. it can. When the outer diameter side portion 22 moves, the inner diameter side portion 21 does not move because it is fixed to the grip portion 1. Hereinafter, the state of FIGS. 4 and 5 may be referred to as a state in which the outer diameter side portion is in the position on the handle side.

  In a state where the outer diameter side portion 22 is in the position on the handle side, the hole 26 communicates with the groove 25. When the fixing member 24 is inserted into the groove 25 and the hole 26 by the user, the fixing member 24 changes from a state where it does not protrude into the hollow portion 11 to a state where it protrudes into the hollow portion 11. In the state where the outer diameter side portion 22 is in the position on the handle side, the biasing member 23 is in a contracted state from the natural length, and therefore the outer diameter side portion 22 biases the biasing force that biases toward the blade edge side. Received from member 23. However, by fixing the fixing member 24 into the hollow portion 11 and inserting it into the groove 25 and the hole 26, the outer diameter side portion 22 is fixed at the position on the handle side against the urging force of the urging member 23. can do. On the other hand, when the outer diameter side portion 22 is not fixed by the fixing member 24, the outer diameter side portion 22 is in a position on the cutting edge side by the biasing force of the biasing member 23.

  In a state where the outer diameter side portion 22 is in the position on the handle side, the protrusion 31 and the groove portion 32 formed on the outer diameter side portion 22 are separated from the protrusion 31 and the groove portion 32 formed on the inner diameter side portion 21. The engaging portion 3 is constituted by the protruding portion 31 and the groove portion 32 formed on the inner diameter side portion 21. The engagement portion 3 has a shape corresponding to a small plus groove so that a plus screw having a smaller size than the engagement portion in a state where the outer diameter side portion 22 is located on the blade edge side can be rotated and fastened. Become.

[Second Embodiment]
FIG. 6 is a perspective view showing a partial configuration of the plug wrench according to the second embodiment of the present invention. FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. In this embodiment, the left side in FIG. 7 may be referred to as the blade edge side, and the right side in FIG. 7 may be referred to as the handle side.

  Referring to FIGS. 6 and 7, plug wrench 110 as a fastener in the present embodiment includes a gripping portion 1 made of, for example, steel and a blade edge portion 2 made of, for example, steel. The blade edge portion 2 has, for example, a cylindrical shape, and the grip portion 1 is fixed to the handle side end portion of the blade edge portion 2. The blade edge portion 2 has an engagement portion 3 that can be engaged with a hexagon nut (not shown) at the edge portion on the blade edge side. A user of the plug wrench 110 holds the grip portion 1 by hand and engages the hex nut with the engagement portion 3 to rotate it. Thereby, a hexagon nut is fastened with respect to the volt | bolt etc. which are not shown in figure, and an object is fixed with a volt | bolt etc. and a hexagon nut.

  For example, the gripping portion 1 has a shape such that the handle side has a rod shape and the blade edge side end portion has a cap shape. The grip portion 1 includes a hollow portion 11. The hollow part 11 has a shape in which the blade edge side is released to the outside.

  The blade edge portion 2 includes an inner diameter side portion 21, an outer diameter side portion 22, a biasing member 23, and a fixing member 24. Each of the inner diameter side portion 21 and the outer diameter side portion 22 has a cylindrical shape, and has a hollow portion having a hexagonal cross-sectional shape. The outer diameter side portion 22 surrounds the outer periphery of the inner diameter side portion 21. The outer diameter side portion 22 is fixed to the grip portion 1 and is formed integrally with the grip portion 1, for example. The handle side end of the inner diameter side portion 21 is inserted into the hollow portion 11. The inner diameter side portion 21 is movable in the hollow portion 11 along the rotation axis R when the hexagon nut is rotated. 6 and 7 show a state in which the inner diameter side portion 21 is in a position on the blade edge side (a side far from the gripping portion 1). Hereinafter, the states of FIGS. 6 and 7 are referred to as the inner diameter side. It may be referred to as a state where the portion is at the position on the blade edge side.

  The configuration of the grip portion 1 omitted in FIGS. 6 and 7 is arbitrary, and a blade edge portion similar to the blade edge portion 2 shown in FIGS. 6 and 7 is provided at the end portion where the grip portion 1 is omitted. Alternatively, a handle or the like for applying a large rotational torque to the hexagon nut may be provided in the grip portion 1.

  The urging member 23 is made of an elastic body such as a spring, for example, and is provided in the hollow portion 11. The handle-side end of the urging member 23 is fixed to the wall surface 12 of the hollow portion 11, and the blade edge-side end of the urging member 23 is fixed to the handle-side end of the inner diameter side portion 21. In a state where the inner diameter side portion 21 is at the position on the blade edge side, the urging member 23 is in a natural length state, and no urging force is generated from the urging member 23.

  A hole 13 is provided on the outer periphery of the grip portion 1, and a fixing member 24 is disposed in the hole 13 so as to be movable in a direction perpendicular to the rotation axis R (vertical direction in FIGS. 6 and 7). Yes. A hole 27 is provided at a predetermined position of the inner diameter side portion 21. The fixing member 24 protrudes into the hollow portion 11 and engages with the hole 27, thereby fixing the position of the inner diameter side portion 21. The function of the fixing member 24 will be described later.

  In a state where the inner diameter side portion 21 is in the position on the cutting edge side, the end surface on the cutting edge side of the inner diameter side portion 21 and the end surface on the outer edge side of the outer diameter side portion 22 are, for example, flush with each other. 3 is configured. At this time, the inner wall surface of the outer diameter side portion 22 does not constitute the engaging portion 3 and is in contact with the outer wall surface of the inner diameter side portion 21. The engaging portion 3 has a shape corresponding to the outer shape of the small-sized hex nut so that the small-sized hex nut can be rotated and fastened.

  8 and 9 are views showing a state where the inner diameter side portion is in the position on the handle side in the plug wrench according to the second embodiment of the present invention. 8 is a perspective view, and FIG. 9 is a cross-sectional view taken along line IX-IX in FIG.

  With reference to FIGS. 8 and 9, the user can move the inner diameter side portion 21 to the position on the handle side (side relatively close to the grip portion 1) by pushing the inner diameter side portion 21. When the inner diameter side portion 21 moves, the outer diameter side portion 22 does not move because it is fixed to the grip portion 1. Hereinafter, the state of FIGS. 8 and 9 may be referred to as a state in which the inner diameter side portion is in the position on the handle side.

  In a state where the inner diameter side portion 21 is at the position on the handle side, the hole 13 communicates with the hole 27. When the fixing member 24 is inserted into the hole 27 by the user, the fixing member 24 changes from a state where it does not protrude into the hollow portion 11 to a state where it protrudes into the hollow portion 11. In the state where the inner diameter side portion 21 is in the position on the handle side, the biasing member 23 is in a contracted state from the natural length, and therefore the inner diameter side portion 21 applies a biasing force for biasing toward the cutting edge side. Is receiving from. However, by protruding the fixing member 24 into the hollow portion 11 and inserting it into the hole 27, the inner diameter side portion 21 can be fixed at the position on the handle side against the urging force of the urging member 23. . On the other hand, when the inner diameter side portion 21 is not fixed by the fixing member 24, the inner diameter side portion 21 is in a position on the cutting edge side by the biasing force of the biasing member 23.

  In a state where the inner diameter side portion 21 is in the position on the handle side, the inner diameter side portion 21 is drawn into the back of the hollow portion 11, and the engaging portion 3 is configured by the inner wall surface of the outer diameter side portion 22. The engaging portion 3 corresponds to the outer shape of the large hex nut so that the hex nut of a larger size can be rotated and fastened than the engaging portion in the state where the inner diameter side portion 21 is in the position on the blade edge side. It becomes a shape.

[Effect of the embodiment]
According to the above-mentioned embodiment, in a state where the outer diameter side portion (in the second embodiment, the inner diameter side portion) is in the position on the blade edge side, the blade edge portion can fasten a fastening member of one size, In a state where the outer diameter side portion (inner diameter side portion in the second embodiment) is located at the handle side, the blade edge portion can be fastened with a fastening member of another size different from the one size. For this reason, the fastening member of various sizes can be fastened with one fastener, and fastening work can be easily performed.

  In addition, since the inner diameter side and the outer diameter side portion can form a single engaging portion that can engage with the fastening member, the area of the engaging portion with the fastening member can be increased, and the fastening operation is facilitated. Can be done.

  Further, in the first embodiment, the blade tip portion is a relatively large size groove in a state where the outer diameter side portion is at the blade tip side position, and among the minus groove, the plus groove, and the hexagonal groove, A fastening member having at least one of the grooves can be fastened, the outer diameter side portion is in the position on the handle side, the blade edge portion is a relatively small size groove, and a minus groove or a plus groove. , And a fastening member having at least one of hexagonal grooves can be fastened. Thereby, a minus screw, a plus screw, or a hexagon socket head cap screw of various sizes can be fastened.

  In the second embodiment, the blade tip portion can be tightened with a relatively small hexagon nut while the inner diameter side portion is on the blade tip side, and the inner diameter side portion is in the second position on the handle side. In a certain state, the first part can fasten hex nuts of various sizes by being able to fasten relatively large hex nuts.

  Furthermore, a biasing member that biases the inner diameter side portion or the outer diameter side portion toward the blade edge side and a position of the inner diameter side portion or the outer diameter side portion against the biasing force of the biasing member by projecting into the hollow portion It is easy to fix the position of the inner diameter side portion or the outer diameter side portion.

[Others]
In the above-described embodiment, the blade edge portion is shown as being divided into two members (inner diameter side portion and outer diameter side portion), but the blade edge portion is divided into three or more members. Also good. By dividing the blade edge portion into a number of members, the size of the fastening member that can be fastened by the fastener can be widened.

  In the first and second embodiments described above, the fixing member may be any member that can fix the position of the inner diameter side or outer diameter side portion against the biasing force of the biasing member. It is also possible to adopt configurations other than those described above with respect to the number and the like. Further, the fixing member and the biasing member may be omitted.

  In the first and second embodiments described above, the fixing member is the outer diameter side portion (second portion) in a state where the outer diameter side portion (in the second embodiment, the inner diameter side portion) is at the cutting edge side position. In the embodiment, the inner diameter side portion) may be further fixed. Such a configuration can be realized, for example, by further forming a hole at a position indicated by an arrow A in the outer diameter side portion 22 in FIG.

  The fastener of the present invention may be a fastener that is fastened by rotating a fastening member. In addition to the plus driver of the first embodiment and the plug wrench of the second embodiment, the minus shown in FIG. A screwdriver or a hex wrench shown in FIG. 11 may be used.

  In the minus driver 120 shown in FIG. 10, the blade edge portion 2 includes an inner diameter side portion 21 and an outer diameter side portion 22 provided so as to surround the outer periphery of the inner diameter side portion 21. The outer diameter side portion 22 is movable along a rotation axis R when a minus screw (a fastening member having a minus groove) (not shown) is rotated. As shown in FIG. 10, in a state where the outer diameter side portion 22 is at the position of the cutting edge side (lower side in FIG. 10), the inner diameter side portion 21 and the outer diameter side portion 22 are flush with each other. The engagement portion 3 is configured by the radial side portion 22. The engaging portion 3 has a shape corresponding to a large-sized minus groove so that a large-sized minus screw can be rotated and fastened. On the other hand, in a state where the outer diameter side portion 22 is at the most handle side position (upper side in FIG. 10), the blade edge side end surface of the outer diameter side portion 22 is separated from the blade edge side end surface of the inner diameter side portion 21. The engagement portion 3 is configured by only 21. The engaging portion 3 has a shape corresponding to a small-sized minus groove so that a minus screw having a smaller size can be rotated and fastened than the engaging portion in a state where the outer diameter side portion 22 is located at the blade edge side. It becomes.

  In the hexagon wrench 130 shown in FIG. 11, the blade edge portion 2 includes an inner diameter side portion 21 and an outer diameter side portion 22 provided so as to surround the outer periphery of the inner diameter side portion 21. Both the inner diameter side portion 21 and the outer diameter side portion 22 have a hexagonal cross-sectional shape. The outer diameter side portion 22 has an engagement portion 3 that can be engaged with a hexagon socket head bolt (a fastening member having a hexagon groove) (not shown), and is used as a rotation axis R when the hexagon socket head bolt is rotated. It can move along. As shown in FIG. 11, in a state where the outer diameter side portion 22 is located on the cutting edge side (lower left side in FIG. 11), the inner diameter side portion 21 and the outer diameter side portion 22 are flush with each other. The engaging portion 3 is configured by the outer shape. The engaging portion 3 has a shape corresponding to a large hexagonal groove so that a large hexagon socket head bolt can be rotated and fastened. On the other hand, in a state where the outer diameter side portion 22 is in the position on the handle side (upper right side in FIG. 11), the cutting edge side end surface of the outer diameter side portion 22 is separated from the cutting edge side end surface of the inner diameter side portion 21, and the inner diameter side. The engaging portion 3 is configured only by the outer shape of the portion 21. The engaging portion 3 is formed into a hexagonal groove having a small size so that a hexagon socket head cap screw having a smaller size than the engaging portion in a state where the outer diameter side portion 22 is located on the blade edge side can be rotated and fastened. The corresponding shape.

  Since the configuration of the minus driver 120 shown in FIG. 10 and the hexagon wrench 130 shown in FIG. 11 other than those described above is the same as that of the plus driver in the first embodiment, description thereof will not be repeated.

  The above-described embodiments can be combined as appropriate. For example, the fixing member and the urging member shown in the first embodiment may be provided for the minus driver 120 shown in FIG. 10 and the hexagon wrench 130 shown in FIG.

  The above-described embodiment is to be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 1 Holding part 2 Cutting edge part 3 Engagement part 11 Hollow part 12 Wall surface 13,26,27 Hole 21 Inner diameter side part 22 Outer diameter side part 23 Energizing member 24 Fixing member 25 Groove 31 Projection part 32 Groove part 100 Plus driver 110 Plug wrench 120 Slotted screwdriver 130 Hexagon wrench R Rotating shaft

Claims (5)

A fastener that is fastened by rotating a fastening member,
A first portion engageable with the fastening member;
A second part fixed to the first part and including a hollow part,
The first portion includes an inner diameter side portion and an outer diameter side portion provided so as to surround the outer periphery of the inner diameter side portion;
The inner diameter side or outer diameter side portion is between a first position that is relatively far from the second portion and a second position that is relatively closer to the second portion. , Is movable in the hollow portion along the rotation axis when rotating the fastening member,
With the inner diameter side or outer diameter side portion in the first position, the first portion can fasten a fastening member of one size,
A fastener in which the first portion can fasten a fastening member of another size different from the one size in a state where the inner diameter side or outer diameter side portion is in the second position.   The fastener according to claim 1, wherein the inner diameter side portion and the outer diameter side portion can constitute one engaging portion that can be engaged with the fastening member. In a state where the outer diameter side portion is in the first position, the first portion is a relatively large groove and is at least one of a minus groove, a plus groove, and a hexagonal groove. A fastening member having a groove can be fastened,
In a state where the outer diameter side portion is in the second position, the first portion is a relatively small size groove and is at least one of a minus groove, a plus groove, and a hexagonal groove The fastener according to claim 1 or 2, wherein a fastening member having a groove can be fastened. In a state where the inner diameter side portion is in the first position, the first portion can be tightened with a relatively small hex nut,
The fastener according to claim 1, wherein the first portion is capable of fastening a relatively large hex nut in a state where the inner diameter side portion is in the second position. A biasing member that biases the inner diameter side or outer diameter side portion relatively far from the second portion;
5. The fixing device according to claim 1, further comprising a fixing member capable of fixing the position of the inner diameter side or outer diameter side portion against the biasing force of the biasing member by projecting into the hollow portion. The fastener described in 1.

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