Mounting device

Abstract

To provide a mounting device using a pinching member for pinching a holding member holding given equipment to enable adjustment of the fixation / movement of the attitude of equipment by a degree of fastening a screw, while preventing the fall-off of the holding member from the pinching member even if excessively loosening the screw during adjusting the attitude of the equipment.SOLUTION: A pair of pinching members 20L, 20R are stored in a state of being horizontally rotatable with respect to a storage member 30, and a support part 12 of a holding member 10 holding equipment is stored in a state of being vertically rotatable with respect to a recessed part 21 formed when the pair of pinching members 20L, 20R are arranged opposite to each other. When the pinching members 20L, 20R are stored in the storage member 30, the pinching members 20L, 20R are constructed to be held in the storage member 30 in a state of restricting the spread of a cavity in the recessed part 21. Thus, excessive looseness of the screw 40 does not cause the recessed part 21 to spread to the extent that the holding member 10 falls off.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a mounting device, and in particular, it is suitable for use in a mounting device configured to sandwich a holding member that holds a given device with a clamping member and adjust the fixing or movement of the posture of the device by the tightening degree of a screw.

Background Art

[0002] Conventionally, a mounting device having a holding structure for holding a given device and a movable structure for making the holding structure movable to change the posture of the device has been known (see, for example, Patent Documents 1 to 3). Each of the mounting devices described in Patent Documents 1 to 3 is configured to hold a sphere to which a holding member of a device is connected by sandwiching it with a clamping member, and adjust the clamping strength with a screw. When the screw is loosened, the sphere can rotate and the posture of the device can be freely adjusted. When the screw is tightened, the sphere cannot rotate and the posture of the device is fixed.

[0003] The pan-tilt head described in Patent Document 1 has a configuration in which an upper cylinder is sandwiched by two lower cylinders separated left and right, and further, the sphere is sandwiched by this upper cylinder, and a device such as a camera is attached to a pedestal at the end of an upper support protruding from the sphere. With this configuration, the upper cylinder can rotate horizontally (yaw direction) around the central axis, and the sphere can rotate vertically (pitch direction) in the upper cylinder along the direction of a slit provided in the upper cylinder as the movable range of the upper support. Further, by operating a single screw inserted through the lower cylinder, the rotation of the sphere and the speed of rotation of the upper cylinder can be adjusted simultaneously.

[0004] However, in the mounting devices described in Patent Documents 1 to 3, when the screw is loosened too much when adjusting the posture of the device, there is a problem that the sphere comes off from the clamping member and drops off. When the sphere drops off, the user needs to reassemble the mounting device, which causes wasted work and reduces work efficiency.

Prior Art Documents

Patent Documents

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 9-152091 [Patent Document 2] Japanese Patent Application Laid-Open No. 2008-89088 [Patent Document 3] Japanese Patent Application Laid-Open No. 8-219375 [Summary of the Invention] [Problems to be Solved by the Invention]

[0006] The present invention has been made to solve such problems, and in a mounting device configured to sandwich a holding member that holds a given device with a clamping member and adjust the fixing / movement of the posture of the device by the tightening degree of a screw, even if the screw is loosened too much when adjusting the posture of the device, it is an object to prevent the holding member from coming off the clamping member and falling off. [Means for Solving the Problems]

[0007] In order to solve the above-described problems, the mounting device of the present invention includes a holding member having a gripping portion for gripping a given device and a support portion for supporting the gripping portion, a pair of clamping members for sandwiching the support portion of the holding member, a housing member for housing at least a part of the pair of clamping members, and a screw for adjusting the tightening degree of the pair of clamping members. The pair of clamping members are housed in a state where they can rotate horizontally in the yaw direction with respect to the housing member, and the support portion of the holding member is housed in a state where it can rotate vertically in the pitch direction along the shape of a recess formed when the pair of clamping members are arranged opposite to each other. When the screw is tightened, the pair of clamping members are displaced to a state where horizontal rotation of the pair of clamping members and vertical rotation of the support portion are disabled, while when the screw is loosened, the pair of clamping members are configured to be displaced to a state where horizontal rotation of the pair of clamping members and vertical rotation of the support portion are enabled. Further, each of the pair of clamping members is configured to be held by the housing member in a state where the spread of the gap in the recess is restricted when at least a part of each is housed in the housing member. [Effects of the Invention]

[0008] According to the present invention configured as described above, the tightening and loosening regarding the rotation in two directions, i.e., the horizontal rotation of the pair of clamping members that clamp the support portion of the holding member and the vertical rotation of the support portion of the holding member, can be simultaneously adjusted by the operation of a single screw. Thereby, the fixing or movement of the two-directional posture of the device held by the holding member can be adjusted by the tightening degree of one screw with respect to the clamping member. Further, according to the present invention, the pair of clamping members that clamp the holding member are housed in a housing member that does not deform according to the tightening degree of the screw, and the pair of clamping members are held by the housing member in a state where the expansion of the gap of the concave portion that houses the support portion of the holding member is restricted. Therefore, even if the screw is loosened too much when adjusting the posture of the device, it is possible to prevent the holding member from coming off the clamping member and falling off.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4A

Figure 4B

Figure 5

Modes for Carrying Out the Invention

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIGS. 1 to 3 are diagrams showing a configuration example of a mounting fixture according to this embodiment. FIG. 1 is an exploded assembly view, FIG. 2 is an assembled completed view, and FIG. 3 is a cross-sectional view. FIG. 3(a) shows a cross-section in a state where each member is assembled and the screw is tightened. FIGS. 3(b) and 3(c) show the cross-section shown in FIG. 3(a) divided into the housing member 30 and the other members.

[0011] As shown in FIG. 1(a), the mounting fixture 1 of this embodiment includes a holding member 10 that holds a given device (not shown), a pair of clamping members 20L and 20R that clamp the support portion 12 of the holding member 10, a housing member 30 that houses a part of the pair of clamping members 20L and 20R, and a screw 40 that adjusts the tightening degree of the pair of clamping members 20L and 20R.

[0012] The holding member 10 includes a gripping portion 11 that grips a given device and a support portion 12 that stands upright from the bottom surface of the gripping portion 11. The shape of the gripping portion 11 is arbitrary and may be configured according to the shape of the device to be gripped. In the example of FIG. 1, the gripping target portion of the device has a substantially cylindrical shape, and in accordance with the substantially cylindrical shape, the gripping portion 11 is constituted by a semi-cylindrical body having an opening on the side surface and a substantially C-shaped cross-sectional shape.

[0013] The holding member 10 is made of an elastic material (for example, an elastomer material which is a polymer material having elasticity at normal temperature), and is configured to be able to expand the opening width of the gripping portion 11. The opening has a width less than the outer diameter of the gripping target portion when the device is not mounted, while it can be expanded to a size that allows the gripping target portion of the device to be introduced into the semi-cylinder when the device is mounted. Thereby, the gripping portion 11 is configured to be able to preferably grip the gripping target portion of the device by its elastic force.

[0014] The support portion 12 is configured in a disc shape and is accommodated in a recess 21 (see Fig. 1(b)) formed when a pair of clamping members 20L and 20R are arranged opposite to each other in a state where it can rotate vertically in the pitch direction (the direction of arrow A shown in Fig. 2) along the shape of the recess 21. At the center of the support portion 12, a shaft hole 13 through which the leg portion 41 of the screw 40 is inserted is provided. The support portion 12 is configured to be vertically rotatable in the pitch direction along the shape of the recess 21 with the leg portion 41 of the screw 40 inserted through the shaft hole 13 as the rotation axis.

[0015] As shown in Fig. 1(b), a pair of clamping members 20L and 20R are accommodated in a state where a part of them can rotate horizontally in the yaw direction (the direction of arrow B shown in Fig. 2) with respect to the accommodating member 30. In this embodiment, with the substantially central position in the height direction of the pair of clamping members 20L and 20R as the boundary, the lower half is accommodated in the accommodating member 30. That is, the pair of clamping members 20L and 20R are opposed to each other, and the support portion 12 of the holding member 10 is accommodated in the recess 21 formed thereby. The leg portion 41 of the screw 40 is passed through the retaining washer 43 and the support portion 12 from the right clamping member 20R to the left clamping member 20L, whereby these members are integrated. In this state, the lower half of the pair of clamping members 20L and 20R is accommodated in the accommodating member 30.

[0016] In the non-accommodated portion that is not accommodated in the accommodating member 30, a recess 21 for accommodating the support portion 12 of the holding member 10 is formed. Here, when the lower half of each of the pair of clamping members 20L and 20R is accommodated in the accommodating member 30, the pair of clamping members 20L and 20R are held by the accommodating member 30 in a state where the expansion of the gap of the recess 21 formed in the non-accommodated portion is restricted. The state where the expansion of the gap of the recess 21 is restricted means that, in a state where the leg portion 41 of the screw 40 is not passed through the shaft hole 13 of the support portion 12, even if the pair of clamping members 20L and 20R are separated from each other while the pair of clamping members 20L and 20R are accommodated in the accommodating member 30, the recess 21 does not expand so much that the holding member 10 falls off.

[0017] The left clamping member 20L has a nut 22 for screw reception in the non-accommodated upper half portion that is not accommodated in the accommodation member 30, and has an annular flat surface 23 that forms the inner surface of the recess 21 around the nut 22. This flat surface 23 faces the annular side surface 14 of the support portion 12. Although there are several holes and notches in the flat surface 23, they may not be present. The right clamping member 20R has a screw stopper 24 that limits the tightening of the screw 40 by having the surface on which the leg portion 41 of the head 42 of the screw 40 stands in contact in the non-accommodated upper half portion that is not accommodated in the accommodation member 30, and has a flat surface 23 similar to the flat surface 23 provided in the left clamping member 20L.

[0018] Thus, each of the pair of clamping members 20L and 20R has an annular flat surface 23 that contacts both annular side surfaces 14 of the support portion 12 at the portion that forms the recess 21 when they are arranged opposite to each other. Both side surfaces 14 of the support portion 12 are formed in a state slightly recessed from the peripheral edge of the annulus. The flat surfaces 23 of the convex clamping members 20L and 20R contact both side surfaces 14 of the support portion 12 in this recessed state. Here, when the screw 40 is tightened strongly, the flat surface 23 that becomes the inner surface of the recess 21 formed by the pair of clamping members 20L and 20R comes into pressure contact with both side surfaces 14 of the support portion 12. Conversely, when the screw 40 is loosened, the pressure contact is released.

[0019] Further, the left clamping member 20L has a semi-cylindrical cavity 25 in the lower half accommodation portion that is accommodated in the accommodation member 30. There is also a similar semi-cylindrical cavity 25 in the lower half of the right clamping member 20R. When the pair of clamping members 20L and 20R are arranged opposite to each other, the left and right semi-cylindrical cavities 25 are combined to form a cylindrical cavity. The tip of a flexible arm (not shown) for attaching the attachment tool 1 is inserted into this cylindrical cavity and is fixed by a camera screw 33 (see FIG. 3) provided at the lower part of the accommodation member 30.

[0020] The housing member 30 has a cylindrical cavity 31 at its upper end. Also, each of the pair of clamping members 20L and 20R has an arcuate outer peripheral surface 26 that contacts the inner peripheral surface 32 of the cylindrical cavity 31 in the lower half of the housing portion that is housed in the housing member 30. In a mode where this arcuate outer peripheral surface 26 slides along the inner peripheral surface 32 of the cylindrical cavity 31, the pair of clamping members 20L and 20R are in a state where they can horizontally rotate in the yaw direction with respect to the housing member 30. Here, when the screw 40 is tightened strongly, the arcuate outer peripheral surface 26 comes into pressure contact with the inner peripheral surface 32 of the cylindrical cavity 31, and conversely, when the screw 40 is loosened, the pressure contact is released.

[0021] As described above, in the mounting device 1 of the present embodiment, when the screw 40 is tightened, the inner peripheral surface 32 of the cylindrical cavity 31 and the arcuate outer peripheral surface 26 come into pressure contact, and at the same time, the flat surface 23 of the recess 21 and the side surface 14 of the support portion 12 come into pressure contact. On the other hand, when the screw 40 is loosened, the pressure contact between the inner peripheral surface 32 of the cylindrical cavity 31 and the arcuate outer peripheral surface 26 is released, and the pressure contact between the flat surface 23 of the recess 21 and the side surface 14 of the support portion 12 is released. In the pressure contact state, the horizontal rotation of the pair of clamping members 20L and 20R and the vertical rotation of the support portion 12 become impossible. On the other hand, in the state where the pressure contact is released, the horizontal rotation of the pair of clamping members 20L and 20R and the vertical rotation of the support portion 12 become possible.

[0022] As described above, in the present embodiment, when the screw 40 is tightened, the pair of clamping members 20L and 20R are displaced to a state where the horizontal rotation of the pair of clamping members 20L and 20R and the vertical rotation of the support portion 12 are disabled. On the other hand, when the screw 40 is loosened, the pair of clamping members 20L and 20R are displaced to a state where the horizontal rotation and the vertical rotation are enabled. Hereinafter, a configuration that enables simultaneous adjustment of two rotational operations, namely the horizontal rotation of the clamping members 20L and 20R and the vertical rotation of the support portion 12, by operating one screw 40 will be described using the cross-sectional configuration of the mounting device 1 shown in FIGS. 4A and 4B. FIG. 4A shows the state where the screw 40 is tightened, and FIG. 4B shows the state where the screw 40 is loosened.

[0023] The pair of clamping members 20L and 20R of the present embodiment are each bent such that the end faces facing each other are bounded by a position near the boundary between the accommodating portion accommodated in the accommodating member 30 and the non-accommodating portion not accommodated in the accommodating member 30. For this reason, in the state where the screw 40 is tightened as shown in FIG. 4A, the end faces of the non-accommodating portions of the pair of clamping members 20L and 20R are in a parallel state and approach each other, while the end faces of the accommodating portions are in a non-parallel state and separate from each other. As a result, the flat surface 23 of the recess 21 and the side surface 14 of the support portion 12 are in pressure contact, and the inner peripheral surface 32 of the cylindrical cavity portion 31 of the accommodating member 30 and the arc-shaped outer peripheral surfaces 26 of the clamping members 20L and 20R are in pressure contact. On the other hand, in the state where the screw 40 is loosened as shown in FIG. 4B, the end faces of the non-accommodating portions of the pair of clamping members 20L and 20R are in a non-parallel state and separate from each other, while the end faces of the accommodating portions are in a parallel state and approach each other. As a result, the pressure contact between the flat surface 23 of the recess 21 and the side surface 14 of the support portion 12 is released, and the pressure contact between the inner peripheral surface 32 of the cylindrical cavity portion 31 of the accommodating member 30 and the arc-shaped outer peripheral surfaces 26 of the clamping members 20L and 20R is released.

[0024] As shown in FIG. 3(c), the accommodating member 30 is provided with an inward convex portion 34 for preventing detachment that protrudes inward on the inner peripheral surface at a position different from the cylindrical cavity portion 31. Further, as shown in FIGS. 1(a) and 3(b), each of the pair of clamping members 20L and 20R is provided with an outward convex portion 27 for preventing detachment that protrudes outward at the lower end portion of the outer peripheral surface on the side opposite to the end faces facing each other. As shown in FIGS. 3(a) and 4A, when the pair of clamping members 20L and 20R are respectively accommodated in the accommodating member 30 and the screw 40 is tightened, the inward convex portion 34 and the outward convex portion 27 are configured to engage with each other. On the other hand, as shown in FIG. 4B, even when the pair of clamping members 20L and 20R are respectively accommodated in the accommodating member 30, the inward convex portion 34 and the outward convex portion 27 do not engage with each other in the state where the screw 40 is not tightened. Thereby, it is possible to prevent the clamping members 20L and 20R from coming off from the accommodating member 30 in the state where the screw 40 is tightened.

[0025] FIG. 5 is a diagram showing an example of use of the mounting device 1 according to the present embodiment. In the example shown in FIG. 5, the mounting device 1 of the present embodiment holds the cylindrical portion 101 of the sensor-type nurse call slave unit 100 equipped with a contact sensor, a breath sensor, a sound sensor, etc. by the gripping portion 11 of the holding member 10. Further, one end of the flexible arm 200 is fixed to the housing member 30 of the mounting device 1. The other end of the flexible arm 200 is fixed to, for example, the bed rail of a patient.

[0026] The sensor-type nurse call slave unit 100 enables a patient who cannot move their limbs independently to call a nurse using means such as contact with the face, breath, and voice. For this purpose, it is necessary to adjust the position and posture of the nurse call slave unit 100 so that it is most convenient for a patient lying in bed to use. The positioning and posture adjustment of this nurse call slave unit 100 are performed by the flexible arm 200 and the mounting device 1.

[0027] The flexible arm 200 is configured to be freely bent by applying an external force and to maintain its shape when no external force is applied. However, even though the flexible arm 200 can be freely bent, there is a limit to the angle at which it can be bent. It is relatively easy to bend at a position around the middle of the flexible arm 200, but it has a structure that is relatively difficult to bend near the tip. Therefore, by bending the flexible arm 200, the approximate position of the nurse call slave unit 100 is determined, the screw 40 of the mounting device 1 is loosened to adjust the posture of the nurse call slave unit 100, and when the adjustment is completed, the screw 40 is tightened to fix the posture. When adjusting the posture of the nurse call slave unit 100, the clamping members 20L and 20R are horizontally rotated at an appropriate angle, and the holding member 10 is vertically rotated at an appropriate angle.

[0028] As described in detail above, in this embodiment, the pair of clamping members 20L and 20R are accommodated in the accommodating member 30 so as to be horizontally rotatable in the yaw direction, and the support portion 12 of the holding member 10 for holding the device is accommodated in a state of being vertically rotatable in the pitch direction along the shape of the concave portion 21. Then, when the screw 40 is tightened, the pair of clamping members 20L and 20R are displaced to a state where the horizontal rotation and vertical rotation shown in FIG. 2 are disabled, while when the screw 40 is loosened, they are displaced to a state where the horizontal rotation and vertical rotation are enabled. Further, when the pair of clamping members 20L and 20R are accommodated in the accommodating member 30, the pair of clamping members 20L and 20R are held by the accommodating member 30 in a state where the expansion of the gap of the concave portion 21 is restricted.

[0029] According to the mounting device 1 of this embodiment configured as described above, the tightening and loosening regarding the rotation in two directions, i.e., the horizontal rotation of the pair of clamping members 20L and 20R that clamp the holding member 10 and the vertical rotation of the holding member 10, can be simultaneously adjusted by the operation of one screw 40. Thereby, the fixing or movement of the posture in two directions of the device held by the holding member 10 can be adjusted by the tightening degree of one screw 40 with respect to the clamping members 20L and 20R.

[0030] Further, according to this embodiment, since the pair of clamping members 20L and 20R are held by the accommodating member 30 in a state where the expansion of the gap of the concave portion 21 that accommodates the support portion 12 of the holding member 10 is restricted, even if the screw 40 is loosened too much (even if the screw 40 comes off) when adjusting the posture of the device, it is possible to prevent the holding member 10 from coming off the concave portion 21 of the clamping members 20L and 20R and falling off.

[0031] In the above embodiment, FIGS. 4A and 4B are shown as a configuration example that enables the simultaneous adjustment of the two rotational operations, i.e., the horizontal rotation of the clamping members 20L and 20R and the vertical rotation of the support portion 12, by the operation of one screw 40, but the present invention is not limited thereto. For example, the following configuration may be adopted.

[0032] That is, the end faces of the pair of clamping members 20L and 20R facing each other are not configured to be bent with the position near the boundary between the accommodating portion and the non-accommodating portion as the boundary, but are configured to be linear. In this case, whether the screw 40 is tightened or loosened, the end faces of the pair of clamping members 20L and 20R are parallel to each other in both the non-accommodating portion and the accommodating portion. When the screw 40 is tightened, the end faces move parallel to each other and approach each other, while when the screw 40 is loosened, the end faces move parallel to each other and separate from each other.

[0033] Here, in the non-accommodating portion, the configuration in which the flat surface 23 of the concave portion 21 and the side surface 14 of the support portion 12 approach each other and are in a pressure contact state, and are separated to release the pressure contact state, is the same as that of the above-described embodiment. On the other hand, for the accommodating portion, instead of the inner peripheral surface 32 of the cylindrical cavity portion 31 of the accommodating member 30 and the arc-shaped outer peripheral surfaces 26 of the clamping members 20L and 20R being in pressure contact, a configuration is used in which the inner peripheral surface of the cavity 25 formed at the lower end portions of the pair of clamping members 20L and 20R and the end portion of the flexible arm 200 inserted into the cavity 25 are in pressure contact.

[0034] In this way, when the screw 40 is tightened, the flat surface 23 of the concave portion 21 and the side surface 14 of the support portion 12 are in pressure contact, and the inner peripheral surface of the cavity 25 and the end portion of the flexible arm 200 whose end portion is inserted into the cavity 25 and fixed to the accommodating member 30 by the camera screw 33 are in pressure contact. As a result, the horizontal rotation of the clamping members 20L and 20R and the vertical rotation of the support portion 12 become impossible. On the other hand, when the screw 40 is loosened, the pressure contact between the flat surface 23 of the concave portion 21 and the side surface 14 of the support portion 12 is released, and the pressure contact between the inner peripheral surface of the cavity 25 and the flexible arm 200 is released. As a result, the horizontal rotation of the clamping members 20L and 20R and the vertical rotation of the support portion 12 become possible.

[0035] In addition, in the above-described embodiment, a configuration example in which the lower half of the clamping members 20L and 20R is accommodated in the accommodating member 30 is shown, but it is not limited to this. That is, any configuration in which the clamping members 20L and 20R are held by the accommodating member 30 under the condition that the expansion of the gap of the concave portion 21 is restricted may be used, and a configuration in which less than half or more than half of the clamping members 20L and 20R are accommodated in the accommodating member 30 may also be used.

[0036] In addition, each of the above embodiments merely shows an example of implementation in carrying out the present invention, and thus the technical scope of the present invention should not be construed in a limited manner. That is, the present invention can be implemented in various forms without departing from its spirit or its main features.

Explanation of Reference Numerals

[0037] 1 Mounting appliance 10 Holding member 11 Gripping portion 12 Support portion 13 Axial hole 14 Both side surfaces of the support portion 20L, 20R Pair of clamping members 21 Recess 22 Nut 23 Plane forming the inner surface of the recess 24 Screwing 25 Cavity 26 Arc-shaped outer peripheral surface 27 Outward convex portion 30 Housing member 31 Cylindrical cavity portion 32 Inner peripheral surface of the cylindrical cavity portion 33 Camera screw 34 Inward convex portion 40 Screw 41 Foot portion 42 Head portion

Claims

1. A holding member having a gripping portion for gripping a given device and a support portion for supporting the gripping portion, A pair of clamping members for clamping the support portion of the holding member, A housing member for housing at least a part of the pair of clamping members, And a screw for adjusting the clamping degree of the pair of clamping members, The pair of clamping members are housed in a state where they can horizontally rotate in the yaw direction with respect to the housing member, The support portion of the holding member is housed in a state where it can vertically rotate in the pitch direction along the shape of a recess formed when the pair of clamping members are arranged opposite to each other, When the screw is tightened, the pair of clamping members are displaced to a state where horizontal rotation of the pair of clamping members and vertical rotation of the support portion are disabled, while when the screw is loosened, the pair of clamping members are displaced to a state where horizontal rotation of the pair of clamping members and vertical rotation of the support portion are enabled, Each of the pair of clamping members is held by the housing member in a state where the spread of the gap in the recess is restricted when at least a part of it is housed in the housing member Characterized by an attachment fixture.

2. The housing member has a cylindrical hollow portion, and each of the pair of clamping members has an arcuate outer peripheral surface that contacts the inner peripheral surface of the cylindrical hollow portion, Each of the pair of clamping members has a flat surface that contacts the side surface of the support portion at a portion that forms the recess when arranged opposite to each other, When the screw is tightened, the inner peripheral surface of the cylindrical hollow portion and the arcuate outer peripheral surface are in pressure contact, and the flat surface of the recess and the side surface of the support portion are in pressure contact. On the other hand, when the screw is loosened, the pressure contact between the inner peripheral surface and the arcuate outer peripheral surface is released, and the pressure contact between the flat surface of the recess and the side surface of the support portion is released. The attachment fixture according to claim 1, characterized by the above.

3. Each of the pair of clamping members has end faces facing each other that bend with the position near the boundary between the housed portion housed in the housing member and the non-housed portion not housed in the housing member as a boundary, When the screw is tightened, the end faces of the housed portions of the pair of clamping members move away from each other, while the end faces of the non-housed portions approach each other, so that the inner peripheral surface of the cylindrical hollow portion and the arcuate outer peripheral surface are in pressure contact, and the flat surface of the recess and the side surface of the support portion are in pressure contact. When the above-mentioned screw is loosened, the end faces of the accommodating portions of the pair of clamping members approach each other while the end faces of the non-accommodating portions are separated from each other, whereby the pressure contact between the inner peripheral surface and the arc-shaped outer peripheral surface is released and the pressure contact between the plane of the concave portion and the side surface of the support portion is released. The mounting device according to claim 2, characterized in that.

4. The mounting device according to any one of claims 1 to 3, characterized in that the support portion has a disc shape and the concave portion has planes facing both side surfaces of the support portion.

5. The accommodating member has, on its inner peripheral surface, an inwardly projecting convex portion for preventing detachment that projects inward. Each of the pair of clamping members has, on its outer peripheral surface on the side opposite to the end faces facing each other, an outwardly projecting convex portion for preventing detachment that projects outward. When each of the pair of clamping members is accommodated in the accommodating member, the inwardly projecting convex portion and the outwardly projecting convex portion are configured to engage with each other. The mounting device according to any one of claims 1 to 3, characterized in that.

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