Fixtures

Abstract

To provide an easy-to-operate fixture. [Solution] The fixture 2 has a main body 3 attached to a member 1 to be fixed, a locking member 18 connected to the main body 3 via an axis member 17, and an elastic locking member 24 and an insertion assisting elastic member 25 disposed between the locking member 18 and the main body 3. When the member 1 to be fixed is inserted into a gripping hole 10 from behind in an insertion direction D1, the locking surface portion 19 is pushed from the tip of the member 1 to be fixed, and the locking member 18 rotates in a non-locking rotation direction RD2 in accordance with the restoring force of the insertion assisting elastic member 25 and against the restoring force of the locking elastic member 24. In other words, when a user simply inserts the member 2 to be fixed into the gripping hole 10, the locking member 18 rotates and the member 1 to be fixed passes through the gripping hole 10.

Description

[Technical field]

[0001] The present invention relates to a fastener that is attached to and fixed to a member to be fastened. [Background technology]

[0002] Conventionally, for example, thin metal plates, tissue paper, etc. are wound around a drum or core (hereinafter referred to as "drum, etc."), and this drum, etc. is passed through a cylindrical rod material so that it rotates freely and the tissue paper, thin metal plate, etc. are pulled out, but it is necessary to prevent the drum, etc. from coming off the rod material. Therefore, as a member that is attached to the rod material to prevent the drum, etc. from coming off the rod material, for example, there is a fixing jig described in Patent Document 1 below (hereinafter referred to as "Publicly Known Patent Document 1 Invention").

[0003] In the invention disclosed in the publicly known document 1, a central hole through which a rod is passed is formed in a cylindrical body, and the tip of a locking lever protrudes into the inside of the central hole to lock onto the rod. The locking lever is connected to the cylindrical body via a pin and rotates around the pin as an axis. When the locking lever is operated by the user's hand, the tip of the locking lever comes to a position where it does not protrude into the inside of the central hole, allowing the rod to be inserted into the central hole, and when the user releases his / her hand, the locking lever rotates due to the restoring force of the coil spring, and the tip of the locking lever is pressed against the rod. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2001-146909 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the invention disclosed in the prior art 1, in order to move the tip of the operating lever to a position where it does not protrude inside the central hole before the rod is passed through the central hole, the user must operate the operating lever against the elastic force of the coil spring, which is time-consuming and makes operation more difficult the larger the spring constant of the coil spring.

[0006] The present invention has been proposed in view of the above-mentioned circumstances, and has an object to provide a fixing device that is easy to operate. [Means for solving the problem]

[0007] In order to achieve the above object, a fastener according to the present invention has a main body portion having a gripping hole into which a rod-shaped member to be fastened is inserted, and a locking surface portion exposed on an inner peripheral surface of the gripping hole, Department When a workpiece is not inserted into the gripping hole, the engaging surface portion protrudes from the inner circumferential surface, and the engaging surface portion rotates about a rotation axis in a direction perpendicular to the gripping hole, thereby rotating the fixed member. Department and a locking elastic member compressed on the opposite side of the locking surface portion with respect to the rotation axis, by pressing the locking member in the rotation direction in which the locking member will be in the protruding state, and an insertion assisting elastic member compressed on the locking surface portion side with respect to the rotation axis, by pressing the locking member in the rotation direction opposite to the rotation direction in which the locking member will be in the protruding state.When the fixed member is inserted into the gripping hole, the locking surface portion is pressed by the fixed member, and the locking member rotates against the restoring force of the locking elastic member in accordance with the restoring force of the insertion assisting elastic member, and the fixed member is inserted into the gripping hole and at the same time the locking member is in the pressed state.

[0008] The fixing device according to the present invention is characterized in that in the protruding state, the degree to which the locking surface portion protrudes from the gripping hole is smaller than when the insertion-assisting elastic member is not present.

[0009] The fixing device of the present invention is characterized in that, in the protruding state, the fixed member is prevented from being inserted into the gripping hole in a direction opposite to the direction in which it is inserted into the gripping hole, by the fixed member contacting the engaging surface portion.

[0010] The fixing tool according to the present invention is characterized in that, in the pressed state, the fixed member is capable of moving in a direction parallel to the direction in which the fixed member is inserted into the gripping hole.

[0011] The fixing device of the present invention is characterized in that, in the pressed state, as the fixed member is pushed in the opposite direction to the direction in which it was inserted into the gripping hole, the frictional force between the fixed member and the locking surface portion causes the locking member to rotate in a rotational direction in which the fixed member is in the protruding state, and the fixed member is restricted from moving in the opposite direction to the direction in which it was inserted into the gripping hole.

[0012] In the fixing device of the present invention, the locking member extends toward the outside of the main body portion, so that an operating portion is formed on the locking member on the opposite side of the locking surface portion relative to the rotation axis, and when the operating portion is operated, the locking member changes from the protruding state or the pressing state to a contained state in which the locking surface portion is housed on the inner surface.

[0013] The fixing device of the present invention is characterized in that the upstream side of the contact portion between the locking surface portion and the fixed member in the rotational direction in which the protruding state occurs protrudes beyond a circumference passing through the contact portion with the rotation axis as the center.

[0014] The fixing device of the present invention is characterized in that the rotation axis is located in a position shifted from the center in a direction perpendicular to the direction in which the locking member extends from the rotation axis toward the locking surface portion, in a direction opposite to the direction in which the fixed member is inserted into the gripping hole. Effect of the Invention

[0015] The fastener according to the present invention has a main body portion having a gripping hole into which a rod-shaped member to be fastened is inserted, and a locking surface portion exposed on the inner peripheral surface of the gripping hole. Department When a member is not inserted into the gripping hole, the locking surface portion protrudes from the inner circumferential surface, and the locking surface portion rotates about a rotation axis perpendicular to the gripping hole. Department The locking member has a locking surface that changes to a pressed state in which it is pressed against the fixed member when the material is inserted into the gripping hole, a locking elastic member that is compressed in a state in which the locking member is pressed in the rotation direction in which it protrudes on the side opposite the locking surface with respect to the rotation axis, and an insertion assist elastic member that is compressed in a state in which the locking member is pressed in the rotation direction opposite to the rotation direction in which it protrudes on the locking surface side with respect to the rotation axis, and when the fixed member is inserted into the gripping hole, the locking surface is pressed by the fixed member, and the locking member rotates against the restoring force of the locking elastic member in accordance with the restoring force of the insertion assist elastic member, and at the same time the fixed member is inserted into the gripping hole, the locking member is in the pressed state. In other words, the restoring force of the insertion assist elastic member is added to the force of the fixed member pressing the locking surface, making it easier for the locking member to rotate. Therefore, when the user simply inserts the member to be fixed into the gripping hole, the locking member rotates and the member to be fixed passes through the gripping hole. In other words, the user does not need to operate the locking member. Therefore, operation is easy.

[0016] In the fixing device according to the present invention, in the protruding state, the locking surface portion protrudes less from the gripping hole compared to when the insertion-assisting elastic member is not present. In other words, in the protruding state, the locking member is pressed by the insertion-assisting elastic member, so the locking surface portion protrudes less from the gripping hole. Therefore, when the locking surface portion is pressed by the fixed member, the locking member rotates easily. This makes it easy to operate.

[0017] In the fixing device according to the present invention, when in the protruding state, the fixed member is prevented from being inserted into the gripping hole in a direction opposite to the direction in which it is inserted into the gripping hole by the fixed member contacting the locking surface portion, thereby preventing the fixed member from being inserted into the gripping hole in the wrong direction.

[0018] In the fixing device according to the present invention, in the pressed state, the fixed member can move in the direction in which it is inserted into the gripping hole. That is, even in the pressed state, the locking member is pressed by the insertion-assisting elastic member, so the locking member is easy to rotate. Therefore, when the user simply presses the fixed member, the locking member rotates and the fixed member moves within the gripping hole. In other words, the user does not need to operate the locking member. Therefore, operation is easy.

[0019] In the fastener according to the present invention, in the pressed state, the fastener is pushed in the opposite direction to the direction of insertion into the gripping hole, and the frictional force between the fastener and the locking surface rotates in a rotation direction in which the locking member protrudes, and the fastener is restricted from moving in the opposite direction to the direction of insertion into the gripping hole. In other words, the locking member bites into the gap between the fastener and the gripping hole as a wedge. Therefore, the pressed state is robust.

[0020] In the fixing device according to the present invention, the locking member extends outward from the main body, and an operating portion is formed on the locking member on the opposite side of the rotation axis from the locking surface portion, and when the operating portion is operated, the locking member changes from a protruding or pressing state to a housed state in which the locking surface portion is housed on the inner circumferential surface. In other words, the force of the user pressing the operating portion is combined with the restoring force of the insertion-assisting elastic member, making it easier for the locking member to rotate. This makes it easier to operate.

[0021] In the fastener according to the present invention, the locking surface portion, on the upstream side in the rotation direction in which the protruding state occurs from the contact portion between the locking surface portion and the fixed member, protrudes beyond the circumference passing through the contact portion about the rotation axis. When the locking surface portion repeatedly comes into contact with the fixed member and becomes worn, the posture of the locking member in the pressed state gradually tilts toward the rotation direction in which the protruding state occurs. However, since the locking surface portion is wider by the amount of the protruding portion of the locking surface portion, the service life of the locking member is long.

[0022] In the fastener according to the present invention, the rotation axis is offset from the center of the locking member in a direction perpendicular to the direction in which the locking member extends from the axis toward the locking surface, in the opposite direction to the direction in which the fixed member is inserted into the gripping hole. In other words, the locking surface is wider by the amount that the rotation axis is offset from the center of the locking member, so the service life of the locking member is longer. [Brief description of the drawings]

[0023] [Figure 1] FIG. 1 is an external perspective view of a fixture according to an embodiment of the present invention in use. [Diagram 2] FIG. 2 is a front view of the fixing device according to the embodiment of the present invention in use. [Diagram 3] FIG. 3 is a cross-sectional side view of a fixture according to an embodiment of the present invention. [Figure 4] FIG. 4 is a cross-sectional side view of a fixing device according to an embodiment of the present invention in use. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] A fastener according to an embodiment of the present invention will be described below with reference to the drawings. Figures 1 and 2 show a fastener 2 according to an embodiment of the present invention. In the following description, as shown in Figure 1, the longitudinal direction of a fixed member 1 to which the fastener 2 is fixed is defined as the front or rear, and the directions perpendicular to the fixed member 1 are defined as the upper, lower, right, and left.

[0025] 1 and 2, the fastener 2 is attached to and fixed to the fixed member 1, which is a cylindrical rod, and prevents a drum or the like (not shown) that is passed through the fixed member 1 from coming off the fixed member 1. The fastener 2 has a main body 3 that is attached to the fixed member 1, a locking member 18 that is connected to the main body 3 via an axis member 17, and an elastic member for locking 24 and an elastic member for assisting insertion 25 that are arranged between the locking member 18 and the main body 3.

[0026] The direction in which the fastener 2 is attached to the fastener 1 is determined by the fastening member 18, the fastening elastic member 24, and the insertion assist elastic member 25 (for the sake of convenience, the following description will be given assuming that the fastener 1 is passed through the fastener 2). That is, the fastener 1 is passed through the fastener 2 from the rear, and is movable toward the front (hereinafter, the direction in which the fastener 1 is passed through the fastener 2 from the rear to the front is referred to as the "insertion direction." See the arrow with reference symbol D1). On the other hand, the fastener 1 is restricted, in principle, from being passed through the fastener 2 from the front (hereinafter, the direction opposite to the insertion direction is referred to as the "removal direction." See the arrow with reference symbol D2).

[0027] The main body 3 has six surfaces, a front surface 4, a rear surface 5, a left side surface 6, a right side surface 7, a top surface 8, and a bottom surface 9. The front surface 4, the rear surface 5, the left side surface 6, and the right side surface 7 are flat, and the top surface 8 and the bottom surface 9 are curved so as to protrude outward. The outer shape of the main body 3 is arbitrary. The main body 3 is formed with a gripping hole 10 through which the fixed member 1 is passed, a groove portion 11 to which the locking member 18 is attached, and an axial hole 16 through which the axial member 17 is passed. The gripping hole 10 is cylindrical and penetrates the center of the front surface 4 and the rear surface 5 of the main body 3 in the front-rear direction. The groove portion 11 is formed in the front surface 4 and extends from the gripping hole 10 to the top surface 8. Specifically, the groove portion 11 has a rear inner surface portion 12, a left inner surface portion 13, and a right inner surface portion 14, and a groove space 15 is formed inside each of the inner surfaces 12, 13, and 14. The groove space 15 communicates with the grip hole 10 and is open at the front surface 4 and the top surface 8. The shaft hole 16 is cylindrical and passes through the left and right side surfaces 6, 7 of the main body 3 in the left-right direction. The shaft hole 16 is located above the grip hole 10 and passes through the groove portion 11. The positions of the shaft hole 16 and the grip hole 10 are perpendicular to each other with a vertical gap between them. A shaft member 17 is passed through the shaft hole 16.

[0028] The locking member 18 has a rectangular column shape and has a locking surface portion 19 at its lower end. The locking member 18 is accommodated in the groove space 15 of the main body 3, and the shaft member 17 is passed through the locking member 18. Therefore, the locking member 18 rotates around a direction perpendicular to the gripping hole 10 (the fixed member 1) by using the shaft member 17 as a rotation axis. The locking surface portion 19 is exposed at the inner peripheral surface 26 of the gripping hole 10. The upper end of the locking member 18 extends upward on the opposite side of the shaft member 17 to the locking surface portion 19 and protrudes to the outside of the main body 3. Therefore, the upper end of the locking member 18 becomes an operation portion 23 on which a user's finger or the like is hooked. Between the back surface of the locking member 18 and the rear inner surface portion 12 of the groove portion 11 of the main body 3, a locking elastic member 24 and an insertion assist elastic member 25 are attached. The locking elastic member 24 and the insertion assist elastic member 25 are coil springs.

[0029] Here, the locking member 18, the locking elastic member 24, and the insertion assist elastic member 25 will be described in detail with reference to the drawings. Figures 3 and 4 show cross sections of the fixing device 2. Figure 3 shows a cross section of the fixing device 2 in a state where the fixed member 1 has not been passed through the gripping hole 10, and Figure 4 shows a cross section of the fixing device 2 in a state where the fixed member 1 has been passed through the gripping hole 10.

[0030] 3 and 4, the locking member 18 rotates about the shaft member 17 as a rotation axis to change between a protruding state (see FIG. 3), a pressing state (see FIG. 4), and a stored state (not shown). Department When the workpiece 1 is not inserted into the gripping hole 10, the locking surface portion 19 protrudes from the inner peripheral surface 26 of the gripping hole 10. As shown in FIG. Department When the material 1 is inserted into the gripping hole 10, the locking surface portion 19 is pressed against the fixed member 1. In the accommodated state, the locking surface portion 19 is accommodated in the inner peripheral surface 26 of the gripping hole 10 and does not protrude from the inner peripheral surface 26.

[0031] The position of the shaft member 17 relative to the locking member 18 (in other words, the rotation axis A of the locking member 18) is shifted rearward from the center. Specifically, the rotation axis A of the locking member 18 is shifted in the removal direction D2 from the center of the width (hereinafter referred to as the "front-rear width W") perpendicular to the direction extending from the center of the shaft member 17 toward the locking surface portion 19.

[0032] The locking surface portion 19 of the locking member 18 is curved so as to protrude downward, but the curved surface of the locking surface portion 19 is not symmetrical in the front-rear direction. Since the locking surface portion 19 is curved, the contact portion 20, which is the portion that comes into contact with the fixed member 1, is not the entire surface of the locking surface portion 19 but a portion of it. The front portion 21, which is the portion forward of the contact portion 20, protrudes outward to a greater extent than the rear portion 22, which is the portion rearward of the contact portion 20. In other words, the front portion 21 protrudes outward beyond the circumference C that passes through the contact portion 20 and has the rotation axis A as its center. Therefore, the length L1 from the rotation axis A to the rear portion 22 is different from the length L2 from the rotation axis A to the front portion 21, and the length L2 is longer than the length L1.

[0033] The locking elastic member 24 is disposed above the shaft member 17 on the opposite side to the locking surface portion 19, while the insertion assisting elastic member 25 is disposed below the shaft member 17 on the locking surface portion 19 side. Both the locking elastic member 24 and the insertion assisting elastic member 25 are sandwiched in a compressed state between the back surface of the locking member 18 and the rear inner surface portion 12 of the groove portion 11 of the main body 3. Therefore, the locking elastic member 24 compresses the locking member 18 in a direction that tilts the locking member 18 forward (counterclockwise direction in the figure, see the arrow with the symbol RD1). When the locking member 18 rotates in this direction, the locking surface portion 19 of the locking member 18 protrudes from the inner surface 26 of the gripping hole 10, resulting in a protruding state (hereinafter, the rotational direction in which the protruding state is achieved will be referred to as the "locking rotation direction RD1"). Therefore, the locking elastic member 24 compresses the locking member 18 by pressing it toward the locking rotation direction RD1, and pushes the locking member 18 into a protruding state.

[0034] On the other hand, the insertion-assisting elastic member 25 compresses the locking member 18 in a direction that tilts the locking member 18 backward (the clockwise rotation direction in the figure, see the arrow with the symbol RD2). When the locking member 18 rotates in this direction, the locking surface portion 19 of the locking member 18 fits into the inner circumferential surface 26 of the gripping hole 10, resulting in a pressed or housed state (hereinafter, the rotation direction that results in the pressed or housed state is referred to as the "non-locking rotation direction RD2"). Therefore, the insertion-assisting elastic member 25 compresses the locking member 18 in a state that it is pressed in the non-locking rotation direction RD2, and pushes the locking member 18 so that it is in the pressed or housed state.

[0035] The locking elastic member 24 and the insertion assisting elastic member 25 have different spring constants. Specifically, the spring constant of the locking elastic member 24 is greater than the spring constant of the insertion assisting elastic member 25. Therefore, when the locking member 18 is in the protruding state, the elastic forces of the elastic members 24, 25 are balanced. The magnitude of the spring constant is determined by the material, size, length, etc. of the elastic members 24, 25.

[0036] If there was no insertion-assisting elastic member 25, the restoring force of the locking elastic member 24 would cause the locking member 18 to rotate in the locking rotation direction RD1 to maintain the protruding state, and the degree to which the locking surface portion 19 protrudes from the inner circumferential surface 26 of the gripping hole 10 would increase. However, because there is the insertion-assisting elastic member 25, the restoring force of the insertion-assisting elastic member 25 is subtracted from the restoring force of the locking elastic member 24, so the degree to which the locking surface portion 19 protrudes from the inner circumferential surface 26 of the gripping hole 10 becomes smaller.

[0037] Fixture 2 is configured as described above. Next, a procedure for using fixture 2 will be described together with the action and effect of fixture 2.

[0038] 3, in the protruding state, the locking surface portion 19 of the locking member 18 protrudes from the inner peripheral surface 26 of the gripping hole 10. When the fixed member 1 is inserted into the gripping hole 10 in the insertion direction D1 from the rear surface 5 toward the front surface 4 of the main body 3, the locking surface portion 19 is pressed from the tip portion of the fixed member 1, and the locking member 18 rotates in the non-locking rotation direction RD2 against the restoring force of the locking elastic member 24 in accordance with the restoring force of the insertion assisting elastic member 25, and the fixed member 1 is inserted into the gripping hole 10. At the same time, as shown in FIG. 4, the locking member 18 is in a pressed state. That is, in the protruding state, since the locking member 18 is pressed by the insertion-assisting elastic member 25, the degree to which the locking surface portion 19 protrudes from the gripping hole 10 is small, and the restoring force of the insertion-assisting elastic member 25 is added to the force of the fixed member 1 pressing the locking surface portion 19, making it easier for the locking member 18 to rotate in the non-locking rotation direction RD2. Therefore, when the user simply inserts the fixed member 1 into the gripping hole 10, the locking member 18 rotates and the fixed member 1 passes through the gripping hole 10. In other words, the user does not need to operate the locking member 18. This makes operation easy.

[0039] On the other hand, the insertion of the fixed member 1 into the gripping hole 10 in the insertion / removal direction D2 from the front surface 4 toward the rear surface 5 of the main body 3 is restricted by the fixed member 1 hitting the locking surface portion 19. In particular, since the front portion 21 of the locking surface portion 19 protrudes outward to a greater extent than the rear portion 22, the tip portion of the fixed member 1 hits and gets caught on the front portion 21. Therefore, the fixed member 1 is prevented from being inserted into the gripping hole 10 in the wrong direction (removal direction D2).

[0040] As shown in Fig. 4, in the pressed state, the fixed member 1 can move in the insertion direction D1. Even in the pressed state, the locking member 18 is pressed by the insertion-assisting elastic member 25, so that the locking member 18 can easily rotate in the non-locking rotation direction RD2. Therefore, when the user simply presses the fixed member 1, the locking member 18 rotates in the non-locking rotation direction RD2, and the fixed member 1 moves within the grip hole 10 while the outer surface of the fixed member 1 slides against the locking surface portion 19. In other words, the user does not need to operate the locking member 18. Therefore, operation is easy.

[0041] On the other hand, when the fixed member 1 is pressed in the removal direction D2 in the pressed state, the frictional force between the fixed member 1 and the locking surface portion 19 causes the locking member 18 to rotate in the locking rotation direction RD1 in response to the pressing. The locking surface portion 19 of the locking member 18 bites into the gap between the fixed member 1 and the gripping hole 10 as a wedge, restricting the fixed member 1 from moving in the removal direction D2. This makes the pressed state more robust. In particular, since the front portion 21 of the locking surface portion 19 protrudes outward to a greater extent than the rear portion 22, the front portion 21 of the locking surface portion 19 bites into the outer surface of the fixed member 1, making the pressed state even more robust.

[0042] In the pressed state, when the operating unit 23 is operated to rotate the locking member 18 in the non-locking rotation direction RD2, the locking member 18 rotates in the non-locking rotation direction RD2 and the locking surface portion 19 fits into the inner peripheral surface 26 of the gripping hole 10, changing from the pressed state to the stored state. The force of the user pressing the operating unit 23 is combined with the restoring force of the insertion-assisting elastic member 25, making it easier for the locking member 18 to rotate, thus facilitating operation. Note that even if the operating unit 23 is operated in the protruding state, the locking member 18 similarly changes from the protruding state to the stored state.

[0043] In this embodiment, when the fixed member 1 is inserted into the gripping hole 10 in the protruding state, the fixed member 1 moves in the gripping hole 10 while the outer surface of the fixed member 1 slides against the locking surface portion 19, so that the locking surface portion 19 repeatedly comes into contact with the fixed member 1 and wears out. When the locking surface portion 19 wears out, the position of the contact portion 20 gradually shifts to the front portion 21, and the posture of the locking member 18 in the pressing state gradually tilts toward the locking rotation direction RD1. The front portion 21, which is on the upstream side of the locking rotation direction RD1, has a wider locking surface portion 19 by the amount that it protrudes from the circumference C, so that the locking member 18 has a longer service life. Furthermore, since the rotation axis A of the locking member 18 is shifted rearward from the center of the front-rear width W, in other words, the area occupied by the front portion 21 is wider. Therefore, the locking member 18 has a longer service life.

[0044] In another embodiment of the invention, the curved surface of the locking surface portion is symmetrical in the front-to-rear direction, with the front and rear portions being equidistant from a circumference about the axis of rotation of the locking member. In other embodiments, the axis of rotation of the locking member is in the center of the locking member.

[0045] Although the embodiment of the present invention has been described in detail above, the present invention is not limited to the above embodiment, and various design modifications can be made to the present invention without departing from the scope of the claims. [Explanation of symbols]

[0046] 1 Fixed member 2 Fixtures 3 Main body 4 Front 5 Rear 6 Left side 7 Right side 8 Top side 9 Bottom side 10 Gripping hole 11 Groove 12 Back inner surface 13 Left inner surface 14 Right inner surface 15 Groove space 16 Shaft hole 17 Shaft member 18 Locking member 19 Locking surface part 20 Contact area (contact part) 21 Anterior part 22 Posterior part 23 Control section 24 Elastic member for locking 25 Elastic member for assisting insertion 26 Inner surface A Rotation Axis C Circumference D1 Insertion Direction D2 removal direction L1, L2 length RD1 locking rotation direction RD2 Unlocked Rotation Direction W Front and rear width

Claims

1. a main body portion having a gripping hole into which a rod-shaped fixed member is inserted; a locking member having a locking surface portion exposed on an inner circumferential surface of the gripping hole, which changes from a protruding state in which the locking surface portion protrudes from the inner circumferential surface when the fixed member is not inserted into the gripping hole to a pressed state in which the locking surface portion is pressed against the fixed member when the fixed member is inserted into the gripping hole by rotating about a rotation axis in a direction perpendicular to the gripping hole; a locking elastic member compressed in a state where the locking member is pressed in a rotation direction in which the locking member is in the protruding state, on the opposite side of the locking surface portion with respect to the rotation shaft; an insertion assisting elastic member that is compressed while pressing the locking member on the locking surface portion side with respect to the rotation shaft in a rotation direction opposite to the rotation direction in which the locking member is in the protruding state; When the fixed member is inserted into the gripping hole, the locking surface portion is pressed by the fixed member, and the locking member rotates against the restoring force of the locking elastic member in accordance with the restoring force of the insertion assist elastic member, and the fixed member is inserted into the gripping hole and at the same time, the locking member is in the pressed state. A fixture characterized by:

2. In the protruding state, the degree to which the locking surface portion protrudes from the gripping hole is smaller than when the insertion-assisting elastic member is not present.

2. The fixture according to claim 1 .

3. In the protruding state, the fixed member is prevented from being inserted into the gripping hole in a direction opposite to the direction in which the fixed member is inserted into the gripping hole, by the fixed member contacting the locking surface portion.

3. A fixture according to claim 1 or 2.

4. In the pressed state, the fixed member is movable in a direction in which the fixed member is inserted into the gripping hole.

3. A fixture according to claim 1 or 2.

5. In the pressed state, the fixed member is pushed in a direction opposite to the direction in which it was inserted into the gripping hole, and the frictional force between the fixed member and the locking surface portion causes the locking member to rotate in a rotational direction in which the locking member is in the protruding state, and the fixed member is restricted from moving in a direction opposite to the direction in which it was inserted into the gripping hole.

3. A fixture according to claim 1 or 2.

6. The locking member extends outward from the main body, whereby an operation portion is formed on the locking member on a side opposite to the locking surface portion with respect to the rotation shaft, When the operating portion is operated, the locking member changes from the protruding state or the pressing state to a housed state in which the locking surface portion is housed in the inner circumferential surface.

3. A fixture according to claim 1 or 2.

7. a protruding portion of the engaging surface portion in a rotational direction protrudes beyond a circumference passing through the contact portion with the fixed member, the protruding portion being located at a position adjacent to the engaging surface portion and the fixed member; 6. The fixture of claim 5.

8. the rotation axis is located at a position offset from the center in a direction perpendicular to the direction in which the locking member extends from the rotation axis toward the locking surface portion, in a direction opposite to the direction in which the fixed member is inserted into the gripping hole; 6. The fixture of claim 5.

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