Fastener

Abstract

To provide a fastener which can secure fixture.SOLUTION: A fastener 3 includes a body 4, a first action member 5, a second action member 6, transmission members 7, an auxiliary member 8, an elastic member 9, and an operation body 10 and is disposed at the first member 1 side. The second action member 6 is disposed in the first housing hole 4a of the body 4 and may move in a direction of an axis 4b. The first action member 5 is disposed in the second housing hole 6a of the second action member 6 and may move in a direction of an axis 6b. The first action member 5 has a first action surface 5b inclining. An inclining receiving surface 4c is provided in the first housing hole 4a. Each transmission member 7 is held in the holding hole 6c of the second action member 6. When the operation body 10 rotates, a cam mechanism 14 moves the auxiliary member 8 in a direction of a rotation axis 10a, a hooked part 8a of the auxiliary member 8 moves away from a hooking part 5c of the first action member 5, and a second action surface 6d presses a second member 2 through the first action member 5 which is biased by the elastic member 9, the transmission members 7, and the second action member 6.SELECTED DRAWING: Figure 9- 2

Description

[Technical field]

[0001] This invention relates to a fixture that can clamp and unclamp two members. [Background technology]

[0002] Conventionally, there has been a positioning clamp device that positions and fixes two members relative to each other (see, for example, Patent Document 1). As shown in FIG. 18, a positioning clamp device 23 is disposed on the first fixed member 21 side with respect to a first fixed member 21 and a second fixed member 22 that are relatively slidable. In this positioning clamp device 23, a shaft body 25 and an acting body 26 are provided in a through hole 24a of a main body 24 so as to be connected to each other, and an operating body 27 is attached to the shaft body 25. The acting body 26 has a tip portion 26a that is inserted into a positioning hole 22a of the second fixed member 22. In order to restrict the movement of the acting body 26 toward the second fixed member 22 side relative to the shaft body 25, the shaft body 25 is provided with a restricting surface 25a facing the opposite side to the second fixed member 22, and the acting body 26 is provided with a restricted surface 26b facing the second fixed member 22 side. The spring member 28 is provided so as to bias the acting body 26 toward the second fixed material 22 relative to the shaft body 25. When the operating body 27 is rotated to move the shaft body 25 toward the second fixed material 22, the restricting surface 25a moves away from the regulated surface 26b, and the acting body 26 receives the biasing force of the spring member 28, causing the tip portion 26a of the acting body 26 to press the inner circumferential surface of the positioning hole 22a. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2021-196022 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, in the conventional positioning clamp device 23, the tip 26a of the acting body 26 was inserted into the positioning hole 22a of the second fixing material 22 to position the positioning clamp device 23 and therefore the first fixing material 21 relative to the second fixing material 22, but the biasing force of the spring member 28 was a force that pressed the tip 26a of the acting body 26 against the inner circumferential surface of the positioning hole 22a of the second fixing material 22. For this reason, the pressing force could not be made strong, making it difficult to firmly fix the first fixing material 21 and the second fixing material 22 to each other.

[0005] The present invention has been made to solve the above-mentioned problems in the conventional art, and an object of the present invention is to provide a fastener that can firmly fix a first member and a second member to each other. [Means for solving the problem]

[0006] In order to achieve the above object, the fixing device according to the present invention has the following configuration. The fixture according to the invention described in claim 1 is a fixture arranged on the first member side so as to clamp and unclamp the first member and the second member. This fixture includes a main body, a first acting member, a second acting member, a transmission member, an auxiliary member, an elastic member, and an operating body. The main body includes a first receiving hole. The second acting member is in the first receiving hole and is movable in the direction of the axis of the first receiving hole. The second acting member includes a second receiving hole. The first acting member is in the second receiving hole and is movable in the direction of the axis of the second receiving hole. The first acting member has a first acting surface on the tip side on the second member side, which is inclined so as to approach the axis of the first acting member as it approaches the tip. Therefore, a receiving surface inclined with respect to the axis of the first receiving hole is provided on the inner peripheral surface of the first receiving hole at a position opposite to the first acting surface. The second acting member has a retaining hole at a tip end side on the second member side through which the transmission member is passed so as to hold the transmission member between the first acting surface and the receiving surface. The second acting member has a second acting surface at a tip end of the retaining hole.

[0007] The auxiliary member is located on the opposite side to the tip of the first working member. The first working member has a hook portion on the opposite side to the tip, and the auxiliary member has a hooked portion on the tip side of the first working member relative to the hook portion. The elastic member elastically biases the first working member toward the tip side of the auxiliary member.

[0008] The operating body moves between an unclamped position and a clamped position by being rotated. A cam groove is provided on one of the second acting member or the main body and the auxiliary member, and a guided protrusion that engages with the cam groove is provided on the other, and the cam groove and the guided protrusion form a cam mechanism. Either the guided protrusion or the cam groove rotates around the rotation axis of the operating body together with the operating body, and the auxiliary member moves in the direction of the rotation axis due to the rotation.

[0009] When the operating body is in the unclamped position, the cam mechanism causes the auxiliary member to be located on the side farther from the tip of the first acting member, and the hanging portion of the first acting member is hung on the hung portion of the auxiliary member. When the operating body is in the clamped position, the cam mechanism causes the auxiliary member to be located on the side closer to the tip of the first acting member, and the hung portion of the auxiliary member is separated from the hanging portion of the first acting member, and the first acting member receives a biasing force due to the elasticity of the elastic member, so that the first acting surface presses the transmission member, which presses the receiving surface, and the transmission member is biased in the direction of the axis of the first housing hole by the reaction of the pressing force, and the second acting member receives the biasing force, so that the second acting surface presses the second member.

[0010] According to this fixing device, the fixing device is disposed on the first member side. When the operating body of the fixing device is placed in the unclamped position, the cam mechanism causes the auxiliary member to be positioned on the side farther from the tip of the first working member, and the hook of the first working member is hooked on the hooked part of the auxiliary member, so that the biasing force of the elastic member applied to the first working member is received by the hooked part of the auxiliary member via the hook of the first working member. Therefore, the biasing force of the elastic member is not transmitted to the transmission member, and the second working surface of the second working member does not press the second member. On the other hand, when the operating body is rotated from the unclamped position to the clamped position, the cam mechanism causes the auxiliary member to move to the side closer to the tip of the first working member. At this time, initially, the first working member moves together with the auxiliary member while the hook portion of the first working member remains hooked on the hooked portion of the auxiliary member, but with this movement, all three pairs of the first working surface of the first working member and the transmission member, the transmission member and the receiving surface of the main body, and the second working surface of the second working member and the second member come into contact. Furthermore, when the operating body is rotated, the first working member does not move, and only the auxiliary member moves, and the hooked portion of the auxiliary member separates from the hook portion of the first working member. Then, the biasing force of the elastic member is transmitted to the first working member, the first working surface, the transmission member and the receiving surface, the retaining hole, and the second working member, and the second working surface presses the second member. In this way, it is possible to increase the force pressing the second member by transmitting the biasing force of the elastic member to the second working member via the first working surface, the transmission member, and the receiving surface.

[0011] A fixing device according to the invention recited in claim 2 is the fixing device recited in claim 1, wherein the cam groove is provided on the second acting member or the main body, and the guided protrusion is provided on an auxiliary member. Thus, at least the guided protrusion of the auxiliary member rotates together with the operating body about the rotation axis, and the rotation moves the auxiliary member in the direction of the rotation axis.

[0012] A fixing device according to the invention recited in claim 3 is the fixing device recited in claim 2, wherein the auxiliary member comprises an auxiliary member main body and a guided pin which is inserted into a horizontal hole formed in the auxiliary member main body, and at least a part of the tip portion of the guided pin which protrudes from the horizontal hole becomes the guided protrusion.

[0013] The fastener according to the invention recited in claim 4 is the fastener according to any one of claims 1 to 3, wherein the receiving surface is an inclined surface that is inclined so as to move away from the axis of the first accommodating hole the further it moves toward the second member. Thus, when the operating body is in the clamping position, the transmitting member is biased toward the tip side of the second acting member in the direction of the axis of the first accommodating hole by a reaction force of the pressure pressing against the receiving surface, and the second acting member receives the bias, causing the second acting surface to press the front surface of the second member.

[0014] The fixing device according to the invention of claim 5 is the fixing device according to claim 4, further comprising a second elastic member. The second elastic member elastically biases the second working member in the opposite direction to the tip of the second working member relative to the main body. By providing the second elastic member, when the operating body is in the unclamped position, the second working member can be pulled up so that the second working surface does not come into contact with the second member, and the relative movement between the first member and the second member can be smoothly performed. The biasing force of the second elastic member is transmitted to the second working member, the retaining hole, the transmission member and receiving surface, the first working surface, the first working member, the auxiliary member, and the cam mechanism, making it easier to hold the operating body in the unclamped position.

[0015] The fastener according to the invention recited in claim 6 is the fastener according to any one of claims 1 to 3, wherein the receiving surface is an inclined surface that is inclined so as to approach the axis of the first accommodating hole the further it approaches the second member. Thus, when the operating body is in the clamping position, the transmitting member is biased in the direction opposite to the tip of the second acting member in the direction of the axis of the first accommodating hole by receiving a reaction force of the pressure pressing against the receiving surface, and the second acting member receives the bias, causing the second acting surface to press the back surface of the second member. Effect of the Invention

[0016] According to the fastener of the present invention, the biasing force of the elastic member can be transmitted to the second acting member via the first acting surface, the transmission member, and the receiving surface, thereby increasing the force pressing against the second member, thereby strengthening the fixation between the first member and the second member. [Brief description of the drawings]

[0017] [Figure 1] 1 is a perspective view of a fixing device when an operating body is in an unclamped position in a first embodiment of the present invention; FIG. [Diagram 2] FIG. 13 is a perspective view of the fixture with the operating body removed. [Diagram 3] FIG. [Figure 4] FIG. 11 is an exploded perspective view of the auxiliary member, the first acting member, and the elastic member according to the first embodiment. [Diagram 5] FIG. 11 is an enlarged vertical cross-sectional view of the fixing device when the operating body is in the unclamped position. [Figure 6] FIG. 4 is an enlarged vertical cross-sectional view of the second acting member of the same embodiment. [Figure 7] FIG. [Figure 8-1] 10A and 10B are respectively an enlarged development view of a cam groove and an overall plan view of the operating body when it is in an unclamped position. [Figure 8-2] 8-1(b) is a cross-sectional view taken along line AA in FIG. 8-1(b). [Figure 9-1] 13A and 13B are respectively an enlarged development view of a cam groove and an overall plan view showing the operation body at a clamping position. [Figure 9-2] 9-1(b) is a cross-sectional view taken along line BB in FIG. 9-1(b). [Figure 10] FIG. 11 is a perspective view of a fixing device according to a second embodiment of the present invention when the operating body is in a clamping position. [Figure 11] FIG. 11 is a cross-sectional view of the fixing device when the operating body is in a clamping position. [Figure 12] FIG. 11 is a perspective view of a fixing device according to a third embodiment of the present invention when the operating body is in a clamping position. [Figure 13] FIG. 11 is a cross-sectional view of the fixing device when the operating body is in the unclamped position. [Figure 14] FIG. 11 is a cross-sectional view of the fixing device when the operating body is in a clamping position. [Figure 15] FIG. 13 is an overall perspective view of the fourth embodiment of the present invention when the operating body is in a clamping position. [Figure 16] FIG. 11 is a longitudinal sectional view of the entire device when the operating body is in a clamping position. [Figure 17] FIG. 11 is a vertical cross-sectional view of the same seen from a different direction. [Figure 18] FIG. 1 is a vertical cross-sectional view showing a conventional positioning clamp device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0019] 1 to 9-2 show a first embodiment of the present invention. In the drawings, reference numeral 1 denotes a first member. Reference numeral 2 denotes a second member. Reference numeral 3 denotes a fixture, which is disposed on the side of the first member 1 so as to enable clamping and unclamping of the first member 1 and the second member 2.

[0020] The fixture 3 includes a main body 4, a first working member 5, a second working member 6, a transmission member 7, an auxiliary member 8, an elastic member 9, and an operating body 10. The main body 4 includes a first receiving hole 4a. The second working member 6 is in the first receiving hole 4a of the main body 4 and is movable in the direction of the axis 4b of the first receiving hole 4a. The second working member 6 includes a second receiving hole 6a, and the axis 6b of the second receiving hole 6a faces the same direction as the axis 4b of the first receiving hole 4a. The first working member 5 is in the second receiving hole 6a of the second working member 6 and is movable in the direction of the axis 6b of the second receiving hole 6a, with the axis 5a being the same as the axis 6b of the second receiving hole 6a.

[0021] The first working member 5 has a first working surface 5b on the tip side on the second member 2 side, which is inclined so as to approach the axis 5a of the first working member 5 toward the tip. A receiving surface 4c inclined with respect to the axis 4b of the first housing hole 4a is provided on the inner circumferential surface of the first housing hole 4a of the main body 4 at a position opposite to the first working surface 5b. The second working member 6 has a retaining hole 6c through which the transmission member 7 passes so as to hold the transmission member 7 (a spherical transmission member in the illustrated embodiment) between the first working surface 5b and the receiving surface 4c on the tip side on the second member 2 side. The second working member 6 has a second working surface 6d on the tip side of the retaining hole 6c.

[0022] The auxiliary member 8 is located on the opposite side to the tip of the first working member 5. Here, the first working member 5 is provided with a hanging portion 5c on the opposite side to its tip. The auxiliary member 8 is provided with a hung portion 8a on the tip side of the first working member 5 from the hanging portion 5c, and the hanging portion 5c and the hung portion 8a are positioned opposite to each other in the direction of the axis 5a of the first working member 5. Thus, the elastic member 9 elastically biases the first working member 5 toward its tip side (downward in the illustrated embodiment) relative to the auxiliary member 8, and this bias causes the hanging portion 5c of the first working member 5 to be hung on the hung portion 8a of the auxiliary member 8.

[0023] The operating body 10 is rotatable about a rotation axis 10a that faces the same direction as the axis 6b of the second receiving hole 6a, and moves between an unclamped position and a clamped position by being rotated. A cam groove 11 is provided on either the second acting member 6 or the main body 4, or the auxiliary member 8, and a guided protrusion 12 that engages with the cam groove 11 is provided on the other, and the cam groove 11 and the guided protrusion 12 form a cam mechanism 14. Either the guided protrusion 12 or the cam groove 11 rotates around the rotation axis 10a together with the operating body 10, and the auxiliary member 8 moves in the direction of the rotation axis 10a due to the rotation.

[0024] Therefore, when the operating body 10 is in the unclamped position, the cam mechanism 14 positions the auxiliary member 8 on the side farther from the tip of the first acting member 5, and the hook portion 5c of the first acting member 5 is hooked onto the hooked portion 8a of the auxiliary member 8.

[0025] On the other hand, when the operating body 10 is in the clamped position, the cam mechanism 14 positions the auxiliary member 8 on the side closer to the tip of the first acting member 5, and the hung portion 8a of the auxiliary member 8 separates from the hanging portion 5c of the first acting member 5. The first acting member 5 receives the elastic force of the elastic member 9, causing the first acting surface 5b to press the transmission member 7, which presses the receiving surface 4c. As a result of the reaction to this pressure, the transmission member 7 is urged in the direction of the axis 4b of the first accommodating hole 4a. The second acting member 6 receives this force (more specifically, through the retaining hole 6c), and the second acting surface 6d presses the second member 2.

[0026] In detail, the cam groove 11 is provided on the second acting member 6 or the main body 4 (in the illustrated embodiment, the second acting member 6), and the guided protrusion 12 is provided on the auxiliary member 8. At least the guided protrusion 12 of the auxiliary member 8 rotates together with the operating body 10 around the rotation axis 10a, and this rotation causes the auxiliary member 8 to move in the direction of the rotation axis 10a. More specifically, the auxiliary member 8 includes an auxiliary member main body 8b and a guided pin 15 that is inserted into a horizontal hole 8c formed in the auxiliary member main body 8b, and at least a part of the tip portion of the guided pin 15 that protrudes from the horizontal hole 8c becomes the guided protrusion 12.

[0027] Moreover, the receiving surface 4c is an inclined surface that is inclined so as to move away from the axis 4b of the first accommodating hole 4a the closer it is to the second member 2 side (the tip side of the second acting member 6). Therefore, when the operating body 10 is in the clamped position, the transmission member 7 receives a reaction force of the pressure pressing against the receiving surface 4c, and is biased toward the tip side of the second acting member 6 in the direction of the axis 4b of the first accommodating hole 4a, and the second acting member 6 receives the bias (more specifically, receives it via the retaining hole 6c), and the second acting surface 6d presses the front surface 2a of the second member 2 (i.e., the surface on the side where the first acting member 5 is located).

[0028] The fixture 3 also includes a second elastic member 16. This second elastic member 16 elastically biases the second working member 6 toward the side opposite to the tip thereof (upper side in the illustrated embodiment) with respect to the main body 4. At this time, the second elastic member 16 is set so that the biasing force due to its elasticity is weaker than the biasing force of the elastic member 9, so that the pressing force of the second working surface 6d of the elastic member 9 pressing the second member 2 is not significantly reduced.

[0029] Specifically, the first member 1 is composed of a base member 1a, a pair of support members 1b, 1b arranged on the base member 1a with a gap therebetween, and a plate-shaped mounting member 1c arranged across the support members 1b, 1b, and the base member 1a, support member 1b, and mounting member 1c are connected by bolts 1d. Here, the mounting member 1c is formed with a through hole 1e penetrating in the plate thickness direction, and the tip side of the second working member 6 passes through this through hole 1e. The second member 2 is placed on the base member 1a and arranged between the pair of support members 1b, 1b.

[0030] The fixture 3 is attached and fixed to the first member 1 (specifically, the mounting member 1c) in a vertical direction. The main body 4 of the fixture 3 is formed in a cylindrical shape, and its inside becomes the first housing hole 4a described above. The main body 4 has a flange portion 4d. The main body 4 (and thus the fixture 3) is fixed to the first member 1 (specifically, the mounting member 1c) at the flange portion 4d using a mounting bolt 17. The first housing hole 4a is provided with an annular protruding portion 4e that penetrates vertically and protrudes inward in an annular shape at the middle position. A ring member 4f is inserted into the first housing hole 4a so as to be positioned below the annular protruding portion 4e, and the aforementioned receiving surface 4c is formed on the inner peripheral surface of the ring member 4f.

[0031] The second working member 6 includes a second working member body 6e and a pad or other backing 6f, and the backing 6f is fixed to the second working member body 6e using a connecting member 6g such as a screw. The second working member body 6e is formed with the second housing hole 6a, and the tip surface (lower surface) of the backing 6f becomes the second working surface 6d. The second housing hole 6a has an axis 6b that is the same as the axis 4b of the first housing hole 4a, and the axes 6b, 4b face in the vertical direction. The second housing hole 6a is a stepped hole, and is formed so that the diameter gradually decreases from top to bottom.

[0032] The cam groove 11 provided in the second working member 6 is formed on the opposite side (upper side) from the tip of the second working member 6. The cam groove 11 penetrates the peripheral wall forming the second housing hole 6a, and two cam grooves 11 are provided, which are positioned 180° apart around the axis 6b of the second housing hole 6a, which is the aforementioned rotation axis 10a. Figure 7 shows a development view of the cam groove 11. The cam groove 11 includes an inclined groove 11a inclined with respect to the lateral direction rotating around the axis 6b (rotation axis 10a) of the second housing hole 6a, and a lateral groove 11b continuing from the inclined groove 11a and facing in the lateral direction. When the operating body 10 is in the unclamped position, the guided protrusion 12 is at the end on the inclined groove 11a side, which is one end of the cam groove 11 (see FIG. 8-1(a)), and when the operating body 10 is in the clamped position, the guided protrusion 12 is at the end on the lateral groove 11b side, which is the other end of the cam groove 11 (see FIG. 9-1(a)). The other end of the cam groove 11, the end on the lateral groove 11b side, is provided with a recess 11c that is recessed toward the side where one end of the cam groove 11 is located in the direction of the axis 6b (rotation axis 10a) of the second housing hole 6a. When the operating body 10 is in the clamped position, the guided protrusion 12 engages with this recess 11c.

[0033] The second working member 6 is formed with a large diameter on the side opposite to its tip, and the portion leading to the large diameter is a step portion 6h. A pin 6i is provided on the peripheral wall of the second working member 6 so as to protrude outward, and the protruding tip side of this pin 6i engages with a groove 4g (notch) provided in the main body 4 and extending vertically (toward the axis 4b of the first housing hole 4a). In this way, as the pin 6i engages with the groove 4g, the second working member 6 moves in the direction of the axis 4b of the first housing hole 4a, but is unable to rotate around the axis 4b of the first housing hole 4a.

[0034] The first working member 5 is composed of two divided bodies 5d, 5e divided in the direction of its axis 5a, and these divided bodies 5d, 5e are connected by a connector 5f such as a set screw. The first working member 5 has the aforementioned hanging part 5c formed in a flange-like protrusion at the end (upper end) opposite to the tip, and has an intermediate flange part 5g formed in a flange-like protrusion in the middle. The aforementioned first working surface 5b is provided on the tip side (lower end side) of the first working member 5.

[0035] As described above, the auxiliary member 8 includes the auxiliary member main body 8b and the guided pin 15. The auxiliary member main body 8b is formed in a cylindrical shape, and a part of it is inserted into the second receiving hole 6a of the second working member 6, and is rotatable around the axis 6b (rotation axis 10a) of the second receiving hole 6a. This auxiliary member main body 8b is composed of a cylindrical tube member 8d and an annular member 8e attached to the lower side of the tube member 8d. Here, the above-mentioned horizontal hole 8c is provided in the tube member 8d, and the above-mentioned hanging part 8a is provided in the annular member 8e so as to protrude inward. Then, a part of the first working member 5 including the hanging part 5c is inserted into the tube of the tube member 8d, and the annular member 8e is attached to the tube member 8d by, for example, pressing or simply fitting. Then, the hanging part 5c and the hanging part 8a are positioned opposite each other, and the first working member 5 is prevented from coming off the auxiliary member main body 8b (auxiliary member 8). The guided pin 15 is formed in a cylindrical rod shape and has annular rollers 15a, 15a fitted near both ends. The roller 15a portion of the guided pin 15 becomes the guided protrusion 12 described above and engages with the cam groove 11.

[0036] The operating body 10 includes a cylindrical operating body main body 10b and a lever portion 10c extending laterally from the operating body main body 10b. The operating body 10 is covered by the auxiliary member 8 at the operating body main body 10b, and the operating body 10 and the auxiliary member 8 are fixed to each other by a screw 18. The operating body 10 (specifically, the operating body main body 10b) has a vertical groove 10d on the inside, and the end of the guided pin 15 fits into this vertical groove 10d, so that the operating body 10 is positioned around the axis 6b (rotation axis 10a) of the second receiving hole 6a with respect to the auxiliary member 8. The operating body 10 (specifically, the operating body main body 10b) has a vertical groove that serves as an indicator portion 10e, and when the operating body 10 is in the clamped position, the indicator portion 10e is aligned with a vertical groove that serves as a display portion 4h formed on the main body 4, and the clamped position is indicated.

[0037] The elastic member 9 is, for example, a compression coil spring. The elastic member 9 is disposed between the intermediate flange portion 5g of the first working member 5 and the auxiliary member 8 (specifically, the auxiliary member main body 8b, more specifically, the annular member 8e). In detail, the elastic member 9 is fitted onto the outer periphery of the first working member 5 in the second accommodating hole 6a of the second working member 6, and is compressed and inserted between the intermediate flange portion 5g of the first working member 5 and the annular member 8e (auxiliary member main body 8b).

[0038] The second elastic member 16 is, for example, a compression coil spring. The second elastic member 16 is disposed between the annular protrusion 4e of the main body 4 and the step 6h of the second working member 6. In detail, the second elastic member 16 is fitted onto the outer periphery of the second working member 6 in the first accommodating hole 4a of the main body 4, and is compressed and inserted between the annular protrusion 4e of the main body 4 and the step 6h of the second working member 6.

[0039] Next, the effect of the fixture 3 having the above configuration will be described. According to this fixture 3, the fixture 3 is disposed on the first member 1 side (attached and fixed to the first member 1 in the illustrated embodiment). When the operating body 10 of the fixture 3 is set to the unclamped position, the cam mechanism 14 positions the auxiliary member 8 on the side farther from the tip of the first working member 5 (upper side), and the hooking portion 5c of the first working member 5 is hooked on the hooked portion 8a of the auxiliary member 8, so that the biasing force of the elastic member 9 applied to the first working member 5 is received by the hooked portion 8a of the auxiliary member 8 via the hooking portion 5c of the first working member 5 (see Fig. 5 and Fig. 8-2). Therefore, the biasing force of the elastic member 9 is not transmitted to the transmission member 7, and the second working surface 6d of the second working member 6 does not press the second member 2.

[0040] On the other hand, when the operating body 10 is rotated from the unclamped position to the clamped position, the auxiliary member 8 is moved by the cam mechanism 14 to the side (lower side) closer to the tip of the first working member 5. At this time, the first working member 5 moves together with the auxiliary member 8 while the hook portion 5c of the first working member 5 is hung on the hooked portion 8a of the auxiliary member 8 at first, but with this movement, all three pairs of the first working surface 5b of the first working member 5 and the transmission member 7, the transmission member 7 and the receiving surface 4c of the main body 4, and the second working surface 6d of the second working member 6 and the second member 2 come into contact with each other. Furthermore, when the operating body 10 is rotated, only the auxiliary member 8 moves without the first working member 5 moving, and the hooked portion 8a of the auxiliary member 8 moves away from the hook portion 5c of the first working member 5. Then, the biasing force of the elastic member 9 is transmitted to the first working member 5, the first working surface 5b, the transmission member 7 and the receiving surface 4c, the retaining hole 6c, and the second working member 6, and the second working surface 6d presses the second member 2, and this pressing force fixes (clamps) the second member 2 to the first member 1 (see FIG. 9-2). In this way, by transmitting the biasing force of the elastic member 9 to the second working member 6 via the first working surface 5b, the transmission member 7, and the receiving surface 4c (that is, by transmitting the biasing force of the elastic member 9 to the second working member 6 after changing the direction of the force by the first working surface 5b and the receiving surface 4c), it is possible to increase the force pressing the second member 2, and the first member 1 and the second member 2 can be firmly fixed to each other.

[0041] The fixing device 3 also includes a second elastic member 16. By providing this second elastic member 16, when the operating body 10 is in the unclamped position, the second acting member 6 can be pulled up so that the second acting surface 6d does not come into contact with the second member 2, and the relative movement between the first member 1 and the second member 2 can be smoothly performed. The biasing force of the second elastic member 16 is transmitted to the second acting member 6, the holding hole 6c, the transmission member 7 and the receiving surface 4c, the first acting surface 5b, the first acting member 5, the auxiliary member 8, and the cam mechanism 14, making it easier to hold the operating body 10 in the unclamped position.

[0042] 10 and 11 show a second embodiment of the present invention. In this embodiment, the fixture 3 is attached and fixed laterally to the first member 1, but the other basic configuration is the same as in the first embodiment, and the following description will mainly focus on the differences, with the same reference numerals used to denote similar parts.

[0043] The second member 2 is, for example, a workpiece to be processed, which is placed on the first member 1. The stopper member 20 and the fixture 3 are attached and fixed to the first member 1 so as to sandwich the second member 2. When the operating body 10 is placed in the clamp position, the second action surface 6d of the second action member 6 presses the second member 2, and this pressure fixes (clamps) the second member 2 to the first member 1 via the stopper member 20. Here, the contact metal 6f constituting the second action member 6 is made of a jaw, but a pad may be further attached to the jaw, and the tip of the pad may serve as the second action surface 6d.

[0044] 12 to 14 show a third embodiment of the present invention. In this embodiment, the fixing device 3 has two sets of the first receiving hole 4a, the first working member 5, the second working member 6 (more specifically, the second working member main body 6e), the ring member 4f, the transmission member 7, and the elastic member 9 arranged side by side, the cam groove 11 is provided in the main body 4, and the fixing device 3 is attached and fixed to the first member 1 sideways, but the other basic configuration is the same as in the first embodiment, and the following description will mainly focus on the different parts, with the same reference numerals assigned to the similar parts.

[0045] The second member 2 is, for example, a workpiece to be processed, which is placed on the first member 1. The stopper member 20 and the fixture 3 are attached and fixed to the first member 1 so as to sandwich the second member 2. When the operating body 10 is set to the clamp position, the second action surface 6d of the second action member 6 presses the second member 2, and the second member 2 is fixed (clamped) to the first member 1 via the stopper member 20 by this pressing. Here, the backing plate 6f constituting the second action member 6 is made of a mouthpiece and is provided so as to span the two second action member main bodies 6e, 6e. The tip portion of the bolt 6k, which receives the second elastic member 16 at its head 6j, is screwed into the backing plate 6f, and the backing plate 6f, and therefore the second action member 6, are elastically biased by the second elastic member 16 in the opposite direction to the tip of the backing plate 6f against the main body 4. The auxiliary member 8 includes an auxiliary member main body 8b and a guided pin 15. The auxiliary member main body 8b includes a cylindrical member 8d, an intermediate ring 8f, and a plate member 8g. The cylindrical member 8d is inserted into a cylindrical portion 4i provided in the main body 4, and is rotatable around a rotation axis 10a. The guided pin 15 is inserted into a horizontal hole 8c formed in the cylindrical member 8d, and guided protrusions 12 at both ends of the guided pin 15 engage with cam grooves 11 provided in the cylindrical portion 4i of the main body 4. The intermediate ring 8f is inserted into the cylindrical member 8d, and the end protruding from the cylindrical member 8d abuts against the plate member 8g. The plate member 8g is provided so as to span the two first working members 5, 5, and the elastic members 9, 9 abut against this plate member 8g. The first acting member 5 passes through a hole 8h formed in the plate member 8g, and has a flange-like protruding hook portion 5c at the end of the hole (the right end in Figs. 13 and 14). The periphery of the hole 8h becomes the hooked portion 8a, and the hooked portion 5c is positioned opposite to the hooked portion 8a.

[0046] 15 to 17 show a fourth embodiment of the present invention. This embodiment differs from the first embodiment in that the ring member 4f is used in an inverted manner, the second acting surface 6d presses the rear surface 2b of the second member 2, and the second elastic member 16 is not used, but the other basic configurations are the same, and the following description will focus on the differences, with the same reference numerals used to denote similar parts.

[0047] The first member 1 is formed in a plate shape and has a through hole 1e. The second member 2 is made of a long material and has a guide groove 2c with an inverted T-shaped cross section along its longitudinal direction. The first member 1 is placed on the upper surface of the second member 2 where the guide groove 2c is located. The fixing device 3 is placed on the upper surface of the first member 1. The ring member 4f of this fixing device 3 is placed below the transmission member 7 and is prevented from coming off by a retaining ring 4x. At this time, the receiving surface 4c formed on the ring member 4f is an inclined surface that is inclined so as to approach the axis 4b of the first receiving hole 4a as it approaches the second member 2 side (the tip side of the second working member 6). In the second working member 6, the backing metal 6f constituting the second working member 6 is inserted into the guide groove 2c, and the upper surface of the backing metal 6f (the surface facing the opposite side to the tip of the second working member 6) becomes the second working surface 6d, and the second working surface 6d faces the ceiling surface of the guide groove 2c, which is the back surface 2b of the second member 2. The second working member main body 6e and the backing metal 6f are connected by a connecting member 6g such as a screw passing through the through hole 1e of the first member 1. In addition, in order to stabilize the posture of the first member 1 and the fixing device 3, guide holes 1f and 4k are provided in the first member 1 and the main body 4 of the fixing device 3 (more specifically, the flange portion 4d), and the tip portion of the guide member 19 such as a bolt passing through the guide holes 1f and 4k is fixed to the backing metal 6f.

[0048] Therefore, when the operating body 10 is in the clamped position, the transmission member 7 is urged in the opposite direction to the tip of the second acting member 6 in the direction of the axis 4b of the first accommodating hole 4a due to the reaction force of the pressure pressing against the receiving surface 4c, and as the second acting member 6 receives this force, the second acting surface 6d presses the back surface 2b of the second member 2.

[0049] The present invention is not limited to the above-described embodiment, and various other modifications are possible. For example, in the first to third embodiments, the fixing device 3 includes the second elastic member 16, but the second elastic member 16 may be omitted.

[0050] In addition, with regard to the hook portion 5c and the hooked portion 8a, the central portion of the guided pin 15 may be the hooked portion 8a, and the hook portion 5c of the first working member 5 may be formed so as to be hooked on the hooked portion 8a.

[0051] Also, a cam groove 11 may be provided in the auxiliary member 8, and a guided protrusion 12 (guided pin 15) may be provided in the second working member 6 or the main body 4. In this case, the guided protrusion 12 (guided pin 15) may be provided integrally with the second working member 6 or the main body 4, and the auxiliary member 8 may rotate together with the operating body 10. Alternatively, the guided protrusion 12 (guided pin 15) may be provided rotatably on the second working member 6 or the main body 4, and the guided protrusion 12 (guided pin 15) may be rotated together with the operating body 10.

[0052] Also, the cam groove 11 includes an inclined groove 11a and a lateral groove 11b, and a recess 11c is provided in the lateral groove 11b, but this recess 11c may be omitted. Also, the recess 11c may be provided in the inclined groove 11a without including the lateral groove 11b. [Explanation of symbols]

[0053] 1. First Component 2 Second member 2a Front surface 2b Back side 3 Fixtures 4. Main unit 4a First storage hole 4b Axis center 4c Receiving surface 5 First acting member 5a Axis center 5b 1st action plane 5c Hanging part 6 Second acting member 6a Second Receiving Hole 6b Axial center 6c holding hole 6d 2nd working surface 7 Transmission parts 8 Auxiliary Materials 8a Cover 8b Auxiliary member body 8c horizontal hole 9 Elastic Members 10 Operation body 10a Rotation axis 11 Cam groove 12 Guided protrusion 14 Cam mechanism 15 Guided pin 16 Second elastic member

Claims

1. A fixture that is disposed on a first member side so as to be able to clamp and unclamp the first member and the second member, The actuator includes a main body, a first acting member, a second acting member, a transmission member, an auxiliary member, an elastic member, and an operating body, The body includes a first receiving hole, The second acting member is disposed within the first receiving hole and is movable in a direction toward an axis of the first receiving hole, The second acting member includes a second receiving hole, The first acting member is disposed within the second receiving hole and is movable in a direction toward an axis of the second receiving hole, The first acting member has a first acting surface on a tip side on the second member side, the first acting surface being inclined so as to approach an axis of the first acting member toward the tip, A receiving surface inclined with respect to an axis of the first accommodating hole is provided on an inner peripheral surface of the first accommodating hole at a position facing the first acting surface, The second acting member has a retaining hole at a tip end side on the second member side through which the transmission member is passed so as to hold the transmission member between the first acting surface and the receiving surface, The second acting member has a second acting surface at a tip end of the retaining hole, The auxiliary member is located on the opposite side to the tip of the first working member, The first working member has a hook portion on a side opposite to a tip thereof, and the auxiliary member has a hooked portion on a tip side of the first working member relative to the hook portion. The elastic member elastically biases the first acting member toward a tip side thereof with respect to the auxiliary member, The operation body is rotated to move between an unclamped position and a clamped position, a cam groove is provided on one of the second acting member or the main body and the auxiliary member, and a guided protrusion that engages with the cam groove is provided on the other of the two, and the cam groove and the guided protrusion form a cam mechanism; Either the guided protrusion or the cam groove rotates together with the operating body about a rotation axis of the operating body, and the auxiliary member moves in a direction toward the rotation axis by the rotation. When the operation body is in the unclamped position, the auxiliary member is positioned on a side farther from the tip of the first acting member by the cam mechanism, and the hook portion of the first acting member is hooked onto the hooked portion of the auxiliary member, When the operating body is in the clamped position, the cam mechanism positions the auxiliary member closer to the tip of the first acting member, and the hung portion of the auxiliary member separates from the hanging portion of the first acting member, and the first acting member receives a biasing force due to the elasticity of the elastic member, causing the first acting surface to press the transmission member, which presses the receiving surface, and the transmission member is biased in the direction of the axis of the first accommodating hole due to the reaction force of the pressure, and the second acting member receives the biasing force, causing the second acting surface to press the second member.

2. the cam groove is provided on the second acting member or the main body, and the guided protrusion is provided on the auxiliary member; The fixture according to claim 1 , wherein at least the guided protrusion of the auxiliary member rotates around the rotation axis together with the operating body, and the auxiliary member moves in the direction of the rotation axis due to the rotation.

3. 3. The fixing device according to claim 2, wherein the auxiliary member comprises an auxiliary member body and a guided pin which is inserted into a horizontal hole formed in the auxiliary member body, and at least a portion of a tip portion of the guided pin which protrudes from the horizontal hole becomes the guided protrusion.

4. the receiving surface is an inclined surface that is inclined so as to move away from the axis of the first receiving hole as it approaches the second member, 4. A fixing device as claimed in any one of claims 1 to 3, wherein when the operating body is in the clamping position, the transmission member is urged toward the tip side of the second acting member in the direction of the axis of the first accommodating hole by a reaction force of the pressure pressing against the receiving surface, and the second acting surface presses against the front surface of the second member as a result of the second acting member receiving the force.

5. A second elastic member is provided. The fixing device according to claim 4 , wherein the second elastic member elastically biases the second acting member in a direction opposite to the tip end thereof relative to the main body.

6. the receiving surface is an inclined surface that is inclined so as to approach an axis of the first receiving hole as it approaches the second member side, 4. A fixing device as claimed in any one of claims 1 to 3, wherein when the operating body is in the clamping position, the transmission member is urged in the opposite direction to the tip of the second acting member in the direction of the axis of the first accommodating hole by a reaction force of the pressure pressing against the receiving surface, and the second acting member receives the force, causing the second acting surface to press the back surface of the second member.

Images