JP7334387B2 - clamping device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamp device that holds a clamped member between a fixed clamp portion and a movable clamp portion and fixes a clamp body to the clamped member.

Conventionally, there has been known a clamping device that allows various types of infusion devices to be attachable and detachable to and from various types of infusion stands having poles with different diameters with a simple operation (see, for example, Patent Document 1). The clamp device of Patent Document 1 includes a clamp body provided with a fixed clamp portion having a shape suitable for gripping a pole, and a clamp body guided in the length direction so as to freely approach and separate from the fixed clamp portion. and a clamp bolt.

A movable clamp portion for attaching the clamping device to the pole with the pole sandwiched between it and the fixed clamp portion is provided at the distal end portion of the clamp bolt so as to be rotatable around the central axis of the clamp bolt. The rear end of the clamp bolt is provided with a rotation knob for moving and rotating the clamp bolt along the guiding direction by the clamp body.

Further, the clamp body is provided with a meshing member having a female threaded portion that meshes with the clamp bolt. An operating member is provided on the distal end side of the rotary knob that engages with the rotary knob when moved toward the rotary knob. By rotating the rotary knob in the releasing direction while moving the operating member toward the rotary knob, the engagement between the engaging member and the clamp bolt is released.

When the clamping device is to be removed from the pole, the clamping bolt is moved in its longitudinal direction after the engagement member and the clamping bolt are unscrewed, and the pole is removed. When the clamping device is fixed to the pole, the movable clamp portion is brought into contact with the pole, the engagement member and the clamp bolt are screwed together by rotating the rotary knob, and the pole is fixed by further rotating. It is fixed between the movable clamp part and the fixed clamp part.

JP 2009-45114

However, according to the clamping device of Patent Document 1, in order to engage and release the engagement member and the clamp bolt, the engagement member is composed of two members, and two members extending in the longitudinal direction are provided. A cylindrical member having a spline groove and a pair of spiral grooves is provided so as to cover the clamp bolt. Therefore, this clamping device has a complicated structure and a large number of parts.

SUMMARY OF THE INVENTION An object of the present invention is to provide a clamping device having a simple structure and capable of performing a clamping operation without any trouble.

The clamping device of the present invention is

a clamp body;
a fixed clamp portion fixed to the clamp body;
a clamp rod guided along its own length so that it can be moved toward and away from the fixed clamp part by the clamp body;
a movable clamping portion provided at the distal end of the clamp rod for sandwiching the clamped member with the fixed clamping portion and fixing the clamp body to the clamped member;
The clamp body pivots about a pivot axis perpendicular to the clamp rod between a first pivot position in which the clamp rod is fixed by contacting the clamp rod and a second pivot position in which the clamp rod is not contacted. a rotatable portion supported so as to
a rotating means for rotating the rotating portion between the first rotating position and the second rotating position;
The rotating portion has a through hole through which the clamp rod passes, and the through hole, as a part of the inner wall thereof, contacts the clamp rod when the rotating portion is positioned at the first rotating position. and a fixed inner wall for fixing the clamp rod.

In this configuration, in the initial state, the rotating portion of the clamp device is positioned at the first rotating position and contacts the clamp rod to fix the clamp rod, and the movable clamp portion is close to the fixed clamp portion. and In order to attach the clamping device to the clamped member from this state, first, the rotating portion is rotated toward the second rotating position by the rotating means, and the fixing of the clamp rod by the rotating portion is released.

Next, the clamp rod is moved to the rear end side, thereby arranging the clamped member between the fixed clamp portion and the movable clamp, which are spaced apart from each other. Then, the rotating portion is positioned at the first rotating position by the rotating means, and the rotating portion and the clamp bolt are fixed. This completes the attachment of the clamping device.

To remove the clamping device, the clamping rod is released by the rotating portion, the clamped member is removed by moving the clamping rod to the rear end side, and the clamping rod is moved to the front end side to be clamped by the rotating portion. It can be done by fixing the rod.

Therefore, according to the present invention, it is possible to provide a clamping device that has a relatively simple structure and that can be attached and detached with a simple operation.

In the present invention,

the clamp rod has an external thread centered on its central axis,
The rotating part is
The fixed inner wall portion is provided with a partially cylindrical internal thread portion,
When the rotating portion is positioned at the first rotating position, the male threaded portion and the female threaded portion are in a threaded state, and when the rotating portion is positioned at the second rotating position, the screw is engaged. configured to release the combined state.

According to this, after the rotating portion is positioned at the first rotating position and brought into contact with the clamp rod, the clamp rod is rotated and the male threaded portion thereof is fastened to the female threaded portion of the rotating portion, whereby the movable portion is The clamp rod can be fixed securely and firmly.

In the present invention,

The rotating means is
a first biasing member that biases the rotating portion from the second rotating position toward the first rotating position;
and an operating portion that rotates the rotating portion from the first rotating position toward the second rotating position against the biasing force of the first biasing member.

According to this, the operation of rotating the rotating portion from the second rotating position to the first rotating position can be performed simply by releasing the second operating portion.

In the present invention, when the clamp rod is pushed in a direction toward the fixed clamp portion in the screwed state, the rotating portion is applied from the clamp rod to the female thread portion of the fixed inner wall portion. It is configured to be rotated in the direction of the second rotation position by the force applied to release the screwed state.

According to this, after the clamped member is removed from between the fixed clamp portion and the movable clamp portion, the rotating portion is positioned at the first rotating position and the rotating portion and the clamp rod are in a screwed state. In this case, the screwed state can be released simply by pushing the clamp rod.

In the present invention,
The through hole is
a first partially cylindrical inner surface parallel to the clamp rod when in the first pivot position;
a second partially cylindrical inner surface that is parallel to the clamp rod when in the second pivoted position;
The rotation axis is perpendicular to the bisector that passes through the intersection of the central axes of the first and second inner surfaces and bisects the obtuse angle formed by the central axes, and is perpendicular to the plane that includes the central axes. and
Preferably, the female threaded portion is provided on the first inner surface.

According to this, the rotating portion is threadably engaged with the clamp rod when positioned at the first rotating position, and is appropriately disengaged when positioned at the second rotating position. Further, by pushing the clamp rod with the first operating portion when the rotating portion is positioned at the first rotating position, the rotating portion can be easily rotated in the second direction. can be easily released, and the movable clamp portion can be brought into contact with the member to be clamped.

Another clamping device of the present invention comprises:
a clamp body;
a fixed clamp portion fixed to the clamp body;
a clamp rod guided along its own length so that it can be moved toward and away from the fixed clamp part by the clamp body;
a movable clamping portion provided at the distal end of the clamp rod for sandwiching the clamped member with the fixed clamping portion and fixing the clamp body to the clamped member;
The clamp body pivots about a pivot axis perpendicular to the clamp rod between a first pivot position in which the clamp rod is fixed by contacting the clamp rod and a second pivot position in which the clamp rod is not contacted. a rotatable portion supported so as to
a rotating means for rotating the rotating portion between the first rotating position and the second rotating position;
The rotating portion has a through hole through which the clamp rod passes,
The through hole includes, as part of its inner wall, a fixed inner wall portion that contacts and fixes the clamp rod when the rotating portion is positioned at the first rotating position,
the clamp rod has an external thread centered on its central axis;
The rotating part also
The fixed inner wall portion is provided with a partially cylindrical internal thread portion,
When the rotating portion is positioned at the first rotating position, the male thread portion and the female thread portion are in a threaded state, and when the rotating portion is positioned at the second rotating position, the threaded state is released. configured to
The rotating means is
a first biasing member that biases the rotating portion from the second rotating position toward the first rotating position;
an operating portion that rotates the rotating portion from the first rotating position toward the second rotating position against the biasing force of the first biasing member;
The rotating portion further includes a rotating portion-side projecting portion projecting on the side opposite to the rotating axis,
The operation portion is supported by the clamp body so as to be rotatable about the rotation axis, and is arranged in a direction intersecting with the rotation direction of the rotation portion and the first movement portion of the rotation portion side protrusion. The clamp body includes a second biasing member that biases the operating portion toward the first rotating position.

According to this, by rotating the operation part in the direction of the second rotation position, the rotation part is smoothly positioned at the second rotation position, and by loosening the force applied to the operation part, the first rotation position is reached. Even when the biasing force of the biasing member is weak, the rotating portion can be smoothly positioned at the first rotating position.

Further, by weakening the biasing force of the first biasing member, the clamp rod can be rotated simply by moving the clamp rod in the distal direction with the operating portion when the rotating portion is positioned at the first rotating position. The portion can be smoothly slightly rotated in the second direction, and the screw engagement between the clamp rod and the rotating portion can be released to such an extent that the clamp rod can be further moved in the distal direction.

1 is a perspective view of a clamping device according to a first embodiment of the invention; FIG. 2 is a front view of the clamping device of FIG. 1; FIG. 2 is an exploded view of the clamping device of FIG. 1; FIG. FIG. 2 is a perspective view showing a rotating portion of the clamp device of FIG. 1; FIG. 5 is a cross-sectional view of the rotating portion of FIG. 4; 2 is an exploded view of a second operating portion of the clamping device of FIG. 1; FIG. FIG. 2 is a cross-sectional view showing a state in which the clamp bolt and the rotating portion are disengaged from each other to the extent that the clamp bolt can move in the axial direction in the clamp device of FIG. 1 ; 8A to 8F are diagrams showing the operation procedure for attaching the clamping device to the member to be clamped. 9A to 9E are diagrams showing an operation procedure for removing the clamping device from the member to be clamped. It is a perspective view which shows the principal part of the clamp apparatus which concerns on 2nd Embodiment of this invention. FIG. 11 is a front view of one member that constitutes a rotating portion in the clamp device of FIG. 10; FIG. 11 is a cross-sectional view showing how the clamp bolt and the rotating portion are screwed together in the clamp device of FIG. 10 ;

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a clamping device according to a first embodiment of the invention. This clamping device is used, for example, to attach and detach an infusion pump or a syringe pump to and from an infusion stand.

As shown in FIGS. 1 and 2, the clamp device 1 includes a clamp body 2, a fixed clamp portion 3 fixed to the clamp body 2, and the clamp body 2 can move toward and away from the fixed clamp portion 3. , and a clamp bolt 4 as a clamp rod. The clamp bolt 4 is guided by the clamp body 2 in its own lengthwise direction. The clamp body 2 is provided with a mounting hole 2a for fixing a mounting base for mounting an infusion pump or a syringe pump.

At the tip of the clamp bolt 4, there is a movable clamp that is rotatable around the central axis of the clamp bolt 4 and clamps the member to be clamped between itself and the fixed clamp portion 3 to fix the clamp body 2 to the member to be clamped. A section 5 is provided. For example, a pole of an infusion stud corresponds to the member to be clamped.

The fixed clamp portion 3 and the movable clamp portion 5 of the clamp body 2 have a shape suitable for sandwiching the clamped member and fixing the clamp device 1 to the clamped member. The movable clamp portion 5 is attached to the tip portion of the clamp bolt 4 with a snap pin 7 via a washer 6 .

A rear end portion of the clamp bolt 4 is provided with a first operation portion 8 for moving and rotating the clamp bolt 4 along the guiding direction of the clamp body 2 . The first operating portion 8 has a shape and material suitable for moving the clamp bolt 4 in the longitudinal direction and rotating around the central axis.

FIG. 3 shows how the clamp device 1 is disassembled. As shown in FIG. 3, the clamp body 2 comprises guides 9 for guiding the clamp bolts 4 as described above. The guide portion 9 has a thick plate-like shape perpendicular to the clamp bolt 4, and has a tubular sliding bearing 10 that guides the clamp bolt 4 at its center. The first operating portion 8 is configured as a knob fixed to the clamp bolt 4 with a set screw 11 .

Further, the clamp body 2 includes a square tube-shaped ABS resin case portion 12 provided on the rear end side of the guide portion 9 . The case portion 12 is attached to the rear surface of the guide portion 9 so as to be pressed by a pressing plate 14 with a countersunk head screw 13 .

It is supported in the case portion 12 so as to be rotatable between a first rotational position P1 and a second rotational position P2 around a shaft 15 forming a rotational axis perpendicular to the clamp bolt 4. A rotating portion 16 is provided. The first rotation position P1 is a position where the clamp bolt 4 is fixed by the rotation portion 16 contacting and screwing the clamp bolt 4 . The second rotation position P2 is a position where the screwing is released without the contact being made. The shaft 15 is rotatably provided with respect to the case portion 12 so that both ends of the shaft 15 protrude outward from one side wall and the other side wall of the case portion 12 .

In addition, the clamp body 2 includes a first biasing member 17 that biases the rotating portion 16 in the direction from the second rotating position P2 to the first rotating position P1, and a first biasing member that moves the rotating portion 16 A second operation portion 18 is provided for rotating from the first rotation position P1 toward the second rotation position P2 against the biasing force of 17 .

As the first biasing member 17 , a compression coil spring is used here, one end of which contacts the rotating portion 16 and the other end of which contacts the case portion 12 . The first biasing member 17 and the second operating portion 18 constitute a rotating means for rotating the rotating portion 16 between the first rotating position P1 and the second rotating position P2.

4 and 5 show the configuration of the rotating portion 16. FIG. As shown in FIGS. 4 and 5, the rotating portion 16 is provided with a through hole H through which the clamp bolt 4 passes. The through hole H has a partially cylindrical first inner surface 19 that is parallel to the side surface of the clamp bolt 4 when the rotating portion 16 is positioned at the first rotating position P1. The first inner surface 19 functions as a fixed inner wall portion that contacts the clamp bolt 4 and fixes the clamp bolt 4 when the rotating portion 16 is positioned at the first rotating position P1.

The through hole H also has a partially cylindrical second inner surface 20 that is parallel to the side surface of the clamp bolt 4 when the rotating portion 16 is positioned at the second rotating position P2.

A rotation axis 21 of the shaft 15 passes through the intersection of the central axes 22 and 23 of the first and second inner surfaces 19 and 20 and is orthogonal to an obtuse bisector 24 formed by the central axes 22 and 23, and It is perpendicular to the plane containing both central axes 22,23. The shaft 15 is arranged in contact with the outer wall of the rotating portion 16 in this embodiment.

That is, the first inner surface 19 has a portion on the front end side of the clamp bolt 4 of the bisector 24 on the side of the rotation axis 21 and a portion on the rear end side of the clamp bolt 4 on the bisector 24 on the side of the rotation axis 21 . and portions located on opposite sides. The first inner surface 19 is provided with a partially cylindrical female threaded portion 25 that is screwed onto the clamp bolt 4 when the rotating portion 16 is positioned at the first rotating position P1.

The second inner surface 20 is not provided with a female threaded portion 25 , and has a portion located on the opposite side of the rotation axis 21 on the distal end side of the clamp bolt 4 on the bisector 24 and the clamp bolt 4 on the bisector 24 . and a portion located on the side of the rotation axis 21 on the rear end side.

When the clamp bolt 4 is pushed in the direction of the fixed clamp portion 3 when the rotating portion 16 is positioned at the first rotating position P1 and is screwed with the clamp bolt 4, the clamp bolt 4 moves toward the female screw portion 25. The threaded engagement is released by rotating in the direction of the second rotating position P2 by a force applied to the second rotating position P2.

That is, when the clamp bolt 4 is pushed in the direction of the fixed clamp portion 3 as described above, the slant surfaces of the corresponding screw threads of the rotating portion 16 and the clamp bolt 4 on the sides that press each other are given to each other. The component of the combined force in the direction of rotation of the rotating portion 16 is sufficient to rotate the rotating portion 16 from the first rotating position P1 to the second rotating position P2 with respect to the rotating portion 16. It is configured to be a strong force.

In other words, the positional relationship and size of the rotation axis 21, the clamp bolt 4, and the female threaded portion 25, and the shape of the screw threads of the clamp bolt 4 and the female threaded portion 25 are selected so that the screwing releasing function can be performed without hindrance. be.

The center axis of the clamp bolt 4 is positioned on the center axis 22 of the first inner surface 19 when the rotating portion 16 is positioned at the first rotating position P1, and the rotating portion 16 is positioned at the second rotating position P1. It is located on the central axis 23 of the second inner surface 20 when located at the position P2.

FIG. 6 is an exploded view of the second operating section 18. As shown in FIG. As shown in FIG. 6 , the second operating portion 18 is supported by the case portion 12 of the clamp body 2 so as to be rotatable around the shaft 15 centered on the rotation axis 21 . The second operating portion 18 is configured by two L-shaped members 26 and 27 that straddle the outside of the case portion 12 from one end to the other end of the shaft 15 .

That is, one end of each of the L-shaped members 26 and 27 is rotatably fitted to both ends of the shaft 15, the other end is connected by a pan head screw 28 and a hexagonal nut 29, and the middle part is a pan head screw 30. It is constructed by coupling with a hexagonal nut 31 . The pan head screw 30 is passed through arc holes 32 (see FIGS. 3 and 7) provided in the side walls on both sides of the case portion 12 . Therefore, the rotation range of the second operating portion 18 is defined by the circular arc hole 32 as a first corresponding position corresponding to the first rotating position P1 of the rotating portion 16 and a second corresponding position corresponding to the second rotating position P2. position.

The case portion 12 of the clamp body 2 is provided with a second biasing member 33 that biases the second operating portion 18 toward the first rotational position P1. As the second biasing member 33, in this embodiment, the vicinity of one end of the second biasing member 33 is rotatably attached to the shaft 15, the one end of which is in contact with the bottom surface of the case portion 12, and the other end of which is in contact with the pan head machine screw 30. Two torsion springs are used.

As will be described later with reference to FIG. 8E, FIG. 7 shows that when the first operation portion 8 is pushed, the screw engagement between the clamp bolt 4 and the rotating portion 16 is such that the clamp bolt 4 can move in the axial direction. is released. At this time, as shown in FIG. 7, the rotating portion 16 is at a position slightly rotated in the direction from the first rotating position P1 to the second rotating position P2. However, the second operating portion 18 remains positioned at the first corresponding position.

As shown in FIG. 7 , the rotating portion 16 includes a screw-engagement-side projecting portion 34 projecting on the side opposite to the shaft 15 . The second operating portion 18 includes an operating portion-side protrusion 35 that protrudes toward the first rotation position P1 of the screwing portion-side protrusion 34 in a direction intersecting the rotating direction of the rotating portion 16 .

8A to 8E show the procedure for attaching the clamping device 1 to the member 36 to be clamped. (a) in FIGS. 8A to 8E shows the entire clamp device 1 in each procedure, and (b) shows how the clamp bolt 4 and the rotating portion 16 are screwed together in each procedure. .

When attaching the clamp device 1, in the initial state, the movable clamp portion 5 is close to the fixed clamp portion 3 and the rotating portion 16 is positioned at the first rotating position P1 as shown in FIG. 8A. , the second operating portion 18 is positioned at the first corresponding position. That is, the clamp bolt 4 is fully pushed in the clamping direction (front end direction), the clamp bolt 4 and the rotating portion 16 are screwed together, and the clamp bolt 4 cannot move in its axial direction.

In this state, as shown in FIG. 8B, when the second operating portion 18 is tilted toward the second corresponding position, the rotating portion 16 rotates to the second rotating position P2. The screwing with the portion 16 is released, and the clamp bolt 4 becomes movable in the axial direction.

Next, as shown in FIG. 8C, the clamp bolt 4 is moved toward the rear end. As a result, a space for arranging the clamped member 36 is provided between the fixed clamp portion 3 and the movable clamp portion 5 .

Next, as shown in FIG. 8D, the hand is released from the second operating portion 18 . As a result, the biasing force of the second biasing member 33 rotates the second operating portion 18 to the first corresponding position. Accordingly, the rotating portion 16 is rotated by the first biasing member 17 to the first rotating position P1. As a result, the rotating portion 16 is screwed onto the clamp bolt 4 . Then, the clamped member 36 is arranged between the fixed clamp portion 3 and the movable clamp portion 5 .

Next, as shown in FIG. 8E , by pressing the first operating portion 8 , the clamp bolt 4 is moved until the movable clamp portion 5 contacts the clamped member 36 . At this time, the force applied from the clamp bolt 4 to the female threaded portion 25 of the rotating portion 16 causes the rotating portion 16 to move toward the second rotating position P2 against the biasing force of the first biasing member 17. Rotate slightly. As a result, the screwing between the clamp bolt 4 and the rotating portion 16 is released to the extent that the clamp bolt 4 can move in the axial direction.

Next, as shown in FIG. 8F, the first operating portion 8 is turned in the fastening direction. As a result, the clamp bolt 4 is pushed rearward by the reaction force from the clamped member 36 , and the screwing force between the rotating portion 16 and the clamp bolt 4 increases. The clamp part 3 is firmly fastened. This completes the attachment of the clamping device 1 to the clamped member 36 .

9A to 9E show the procedure for removing the clamping device 1 from the member 36 to be clamped. (a) in FIGS. 9A to 9E shows the entire clamp device 1 in each procedure, and (b) shows how the clamp bolt 4 and the rotating portion 16 are screwed together in each procedure. .

Removal of the clamp device 1 is performed as follows. That is, first, as shown in FIG. 9A, the first operation portion 8 is turned in the direction of releasing the fastening to release the fastening between the clamp bolt 4 and the rotating portion 16 . As a result, the fastening force between the clamp bolt 4 and the rotating portion 16 is weakened, and the screwing can be released by tilting the rotating portion 16 .

Next, as shown in FIG. 9B, the second operating portion 18 is pushed toward the second corresponding position. As a result, the screwing between the clamp bolt 4 and the rotating portion 16 is released, and the clamp bolt 4 can be moved in the axial direction.

Next, as shown in FIG. 9C, the first operating portion 8 is pulled to move the clamp bolt 4 rearward. As a result, a space for removing the clamped member 36 is created between the movable clamping portion 5 and the fixed clamping portion 3 .

Next, as shown in FIG. 9D , the user releases the second operation portion 18 and removes the clamped member 36 from between the fixed clamp portion 3 and the movable clamp portion 5 . At this time, the second operating portion 18 is moved to the first corresponding position by the second biasing member 33, and accordingly the rotating portion 16 is rotated to the first rotating position P1 by the first biasing member 17. Therefore, screwing between the clamp bolt 4 and the rotating portion 16 is established.

Next, as shown in FIG. 9E , the second operation part 18 is pushed to bring the movable clamp part 5 closer to the fixed clamp part 3 . At this time, as shown in FIG. 8E, the screw engagement between the clamp bolt 4 and the rotating portion 16 is released to such an extent that the clamp bolt 4 can be moved in the distal direction. 3 can be approximated. This completes the removal of the clamping device 1 from the clamped member 36, making the clamping device 1 compact and easy to store.

As described above, according to the present embodiment, it is possible to provide the clamping device 1 that can be attached to and removed from the clamped member 36 with a relatively simple configuration and a simple operation.

Further, after placing the clamped member 36 between the fixed clamp portion 3 and the movable clamp portion 5, the movable clamp portion 5 is brought into contact with the clamped member 36 simply by pressing the clamp bolt 4 with the first operation portion 8. can be made Therefore, the clamping device 1 can be reliably fixed to the member 36 to be clamped only by slightly rotating the first operation portion 8 thereafter.

Further, since the first biasing member 17 for the rotating portion 16 and the second biasing member 33 for the second operating portion 18 are provided, the first biasing member 17 can be adjusted by loosening the force applied to the second operating portion 18 . Even when the biasing force of the member 17 is weak, the rotating portion 16 can be smoothly positioned at the first rotating position P1.

Further, by weakening the biasing force of the first biasing member 17, the clamp bolt 4 can be pushed forward by the first operating part 8 when the rotating part 16 is positioned at the first rotating position P1. By simply moving the rotating portion 16, the rotating portion 16 is smoothly and slightly rotated in the direction of the second rotating position P2, and the screw engagement between the clamp bolt 4 and the rotating portion 16 is further moved toward the distal end of the clamp bolt 4. You can unlock it as much as you can.

FIG. 10 shows a main part of a clamping device according to a second embodiment of the invention. As shown in FIG. 10, in this clamping device, the rotating portion 56 is configured by fastening two members 56a and 56b with pan head machine screws 47 and 49 and hexagonal nuts 48 and 50. As shown in FIG.

As in the case of the rotating portion 16 in FIG. 6, the rotating portion 56 is rotated between the first rotating position P1 and the second rotating position P2 with the shaft 15a as the rotating shaft by the case portion 12a. freely supported. The second operating portion 18a has L-shaped members 26a and 27a that are fastened at the upper end with a pan head screw 28a and a hexagonal nut 29a, and at an intermediate portion with a pan head screw 30a and a hexagonal nut 31a. It is constructed by inserting a pan head machine screw 30a into an arc hole 32a and tightening it.

However, unlike the case of the first embodiment, when configuring the second operation portion 18a, the pan head machine screw 30a is passed through the through hole 57 provided in the rotating portion 56 arranged in the case portion 12a. be done. As a result, the rotating portion 56 and the second operating portion 18a are integrally rotated between the first rotating position P1 and the second rotating position P2.

In relation to this, unlike the first embodiment, a biasing member 17a corresponding to the first biasing member 17 in FIGS. No equivalent is provided.

FIG. 11 shows the member 56a of the rotating portion 56 in FIG. The member 56b has a shape substantially symmetrical with the member 56a. As can be seen from FIG. 11, the rotating portion 56 has a through hole Ha as in the case of the rotating portion 16 of FIG. The through hole Ha is provided with a first inner surface 19a and a second inner surface 20a similar to the first inner surface 19 and the second inner surface 20 in FIG.

That is, the first inner surface 19a is parallel to the side surface of the clamp bolt 4 and comes into contact with the clamp bolt 4 when the rotating portion 56 is positioned at the first rotating position P1. function as The first inner surface 19a is provided with a partially cylindrical female screw portion 25a that is screwed onto the clamp bolt 4 when the rotating portion 56a is positioned at the first rotating position P1.

The second inner surface 20a is parallel to the side surface of the clamp bolt 4 when the rotating portion 56 is positioned at the second rotating position P2.

As in the case of the first embodiment, the rotation axis 21a of the shaft 15a passes through the intersection of the central axes 22 and 23 of the first and second inner surfaces 19a and 20a and forms an obtuse angle between the central axes 22 and 23. It is perpendicular to the bisector 24 and perpendicular to the plane containing both central axes 22,23.

As with the rotating portion 16 in FIG. 5, the rotating portion 56 is located at the first rotating position P1 and when it is screwed with the clamp bolt 4, the clamp bolt 4 moves in the direction of the fixed clamp portion 3. When pushed downward, the female screw portion 25a is rotated in the direction of the second rotation position P2 by the force applied from the clamp bolt 4 to the female screw portion 25a, thereby releasing the threaded engagement.

However, in the case of this embodiment, the second biasing member is not provided, and only the biasing member 17a moves the rotating portion 56 and the second operation portion 18a from the second rotating position P2 to the first rotating position P1. , the biasing force of the biasing member 17a of the present embodiment is greater than that of the first biasing member 17 of the first embodiment.

Therefore, the operation described above with reference to FIG. 8E, that is, the operation of moving the clamp bolt 4 until the movable clamp portion 5 contacts the clamped member 36 by pressing the first operation portion 8 can be performed smoothly. It may not be possible.

Therefore, the female threaded portion 25a is provided at a position farther from the bisector 24 than in the case of the first embodiment, as described above, so that this operation can be performed smoothly.

FIG. 12 shows how the clamp bolt 4 and the rotating portion 56 are screwed together. In FIG. 12, the rotating portion 56 is rotated by the biasing force of the biasing member 17a and positioned at the first rotating position P1, and the second operating portion 18a is rotated integrally with the rotating portion 56. It is shown in the pivoted position. Note that the rotating portion 56 does not have a portion corresponding to the screwing portion-side projecting portion 34 in FIG. 7, and is not provided.

Note that other points not mentioned in this embodiment are the same as those in the first embodiment.

Although the embodiments of the present invention have been described above, the present invention is not limited thereto. For example, the fixing of the clamp bolt 4 by the rotating portions 16 and 56 may be performed by using other engaging means instead of the female thread portions 25 and 25a.

DESCRIPTION OF SYMBOLS 1... Clamp device, 2... Clamp main body, 3... Fixed clamp part, 4... Clamp bolt, 5... Movable clamp part, 6... Washer, 7... Snap pin, 8... First operation part, 9... Guide part, 10... Sliding bearing 11 Set screw 12, 12a Case portion 13 Countersunk screw 14 Holding plate 15, 15a Shaft H, Ha Rotating portion 17 First biasing member 17a Biasing member 18, 18a Second operating portion 19, 19a First inner surface 20, 20a Second inner surface 21, 21a Rotation axis 22, 23 Center axis 24 Bisector , 25, 25a... Female screw part 26, 27, 26a, 27a... L-shaped member 28, 28a, 30, 30a... Pan head screw, 29, 29a, 31, 31a... Hexagonal nut, 32, 32a... Circular hole, 33... Second biasing member 34... Threading part side protrusion 35... Operation part side protrusion 36... Clamped member 47, 49... Pan head machine screw 48, 50... Hexagonal nut 56... Rotating Part 56a, 56b... Member P1... First rotation position P2... Second rotation position.

Claims (3)

a clamp body;
a fixed clamp portion fixed to the clamp body;
a clamp rod guided along its own length so that it can be moved toward and away from the fixed clamp part by the clamp body;
a movable clamping portion provided at the distal end of the clamp rod for sandwiching the clamped member with the fixed clamping portion and fixing the clamp body to the clamped member;
The clamp body pivots about a pivot axis perpendicular to the clamp rod between a first pivot position in which the clamp rod is fixed by contacting the clamp rod and a second pivot position in which the clamp rod is not contacted. a rotatable portion supported so as to
a rotating means for rotating the rotating portion between the first rotating position and the second rotating position;
The rotating portion has a through hole through which the clamp rod passes,
The through hole includes, as part of its inner wall, a fixed inner wall portion that contacts and fixes the clamp rod when the rotating portion is positioned at the first rotating position ,
the clamp rod has an external thread centered on its central axis,
The rotating part also
The fixed inner wall portion is provided with a partially cylindrical internal thread portion,
When the rotating portion is positioned at the first rotating position, the male threaded portion and the female threaded portion are in a threaded state, and when the rotating portion is positioned at the second rotating position, the threaded state is released. configured to
The rotating means is
a first biasing member that biases the rotating portion from the second rotating position toward the first rotating position;
an operation portion that rotates the rotating portion from the first rotating position toward the second rotating position against the biasing force of the first biasing member;
The rotating portion further includes a force applied from the clamp rod to the internal thread portion of the fixed inner wall portion when the clamp rod is pushed in a direction toward the fixed clamp portion while in the screwed state. A clamping device characterized in that it is configured to rotate in the direction of the second rotation position by means of a force to release the screwed state. a clamp body;
a fixed clamp portion fixed to the clamp body;
a clamp rod guided along its own length so that it can be moved toward and away from the fixed clamp part by the clamp body;
a movable clamping portion provided at the distal end of the clamp rod for sandwiching the clamped member with the fixed clamping portion and fixing the clamp body to the clamped member;
The clamp body pivots about a pivot axis perpendicular to the clamp rod between a first pivot position in which the clamp rod is fixed by contacting the clamp rod and a second pivot position in which the clamp rod is not contacted. a rotatable portion supported so as to
a rotating means for rotating the rotating portion between the first rotating position and the second rotating position;
The rotating portion has a through hole through which the clamp rod passes,
The through hole includes, as part of its inner wall, a fixed inner wall portion that contacts and fixes the clamp rod when the rotating portion is positioned at the first rotating position,
the clamp rod has an external thread centered on its central axis,
The rotating part also
The fixed inner wall portion is provided with a partially cylindrical internal thread portion,
When the rotating portion is positioned at the first rotating position, the male threaded portion and the female threaded portion are in a threaded state, and when the rotating portion is positioned at the second rotating position, the threaded state is released. configured to
The rotating means is
a first biasing member that biases the rotating portion from the second rotating position toward the first rotating position;
an operation portion that rotates the rotating portion from the first rotating position toward the second rotating position against the biasing force of the first biasing member;
The rotating portion further includes a rotating portion-side projecting portion projecting on the side opposite to the rotating axis,
The operation portion is supported by the clamp body so as to be rotatable about the rotation axis, and is arranged in a direction intersecting with the rotation direction of the rotation portion and on the first protrusion of the rotation portion side. provided with an operation unit side projecting portion projecting toward the rotation position side,
A clamp device, wherein the clamp main body includes a second biasing member that biases the operating portion toward the first rotational position. The through hole is
a first partially cylindrical inner surface parallel to the clamp rod when in the first pivot position;
a second partially cylindrical inner surface that is parallel to the clamp rod when in the second pivoted position;
The rotation axis is perpendicular to the bisector that passes through the intersection of the central axes of the first and second inner surfaces and bisects the obtuse angle formed by the central axes, and is perpendicular to the plane that includes the central axes. and
3. The clamping device according to claim 1 , wherein the female threaded portion is provided on the first inner surface.

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