Rotating support device

Abstract

To provide a rotating support device that allows for easy modification of the rotation range with a simple configuration. [Solution] The device comprises a base, a pivot shaft rotatably mounted on the base, and a rotation angle restricting member detachably mounted on the outer circumference of the pivot shaft of the base, wherein the rotation angle restricting member is mounted on at least one side of the outer circumference of the pivot shaft, a contact portion is provided on the outer surface of the pivot shaft, and a rotation restricting portion is provided on the rotation angle restricting member, and the rotation angle of the pivot shaft is restricted by the contact between the contact portion and the rotation restricting portion.

Description

Technical Field

[0001] The present invention relates to a rotation support device for rotatably supporting a device, and more particularly to a device devised to easily change the rotation range with a simple configuration.

Background Art

[0002] For example, as a conventional configuration for rotatably supporting a device and restricting the rotation range, there is one disclosed in Patent Document 1. In the dental treatment table according to the invention of Patent Document 1, a tray is horizontally rotatably supported via a thrust bearing with respect to a third support shaft fixed to an upward tip portion of a second arm. The horizontal rotation of the tray is restricted by a rotation restricting means.

[0003] The rotation restricting means includes an annular member fixedly provided concentrically with the third support shaft on the lower surface of the tray, an arcuate notch formed in the annular member, and a stopper pin screwed around the tip portion of the second arm. The stopper pin is housed in the arcuate notch, and the range of horizontal rotation of the tray is restricted to the range in which the stopper pin can move within the arcuate notch.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The above conventional configuration had the following problems. That is, in the configuration described in Patent Document 1, when changing the rotation range, it is necessary to replace the annular member fixedly provided concentrically with the third support shaft with another annular member having a different size of the arcuate notch, and the change work is complicated.

[0006] The present invention is based on these points and aims to provide a pivot support device that can easily change its range of rotation with a simple configuration. [Means for solving the problem]

[0007] To achieve the above objective, the rotating support device according to claim 1 of the present invention comprises a base, a rotating shaft rotatably installed on the base, and a rotation angle restricting member detachably installed on the outer circumference of the rotating shaft of the base, wherein the rotation angle restricting member is installed on at least one side of the outer circumference of the rotating shaft, a contact portion is provided on the outer surface of the rotating shaft, and a rotation restricting portion is provided on the rotation angle restricting member, and the rotation angle of the rotating shaft is restricted by the contact between the contact portion and the rotation restricting portion. Furthermore, the pivot support device according to claim 2 is characterized in that, in the pivot support device according to claim 1, a cover member is installed on the side of the outer circumference of the pivot shaft where the pivot angle restricting member is not installed. Furthermore, the rotational support device according to claim 3 is a rotational support device according to claim 1, wherein an object mounting member is provided on the tip side of the rotational shaft, the rotational angle restricting member is installed between the base and the object mounting member, the base is provided with a female screw portion into which a screw member for fixing the rotational angle restricting member is screwed, the rotational angle restricting member is provided with a mounting through hole through which the screw member passes, and when the rotational shaft is rotated and the object mounting member is rotated to a predetermined angle, the screw member can be fastened to or removed from the mounting through hole and the female screw portion. Furthermore, the pivot support device according to claim 4 is characterized in that, in the pivot support device according to claim 1, the pivot shaft is installed in a through-hole for the pivot shaft that penetrates the base, and the rotation of the pivot shaft is restricted by a pivot fixing part that extends in and out of the through-hole for the pivot shaft. [Effects of the Invention]

[0008] As described above, the rotating support device according to claim 1 of the present invention comprises a base, a rotating shaft rotatably installed on the base, and a rotation angle restricting member detachably installed on the outer circumference of the rotating shaft of the base, wherein the rotation angle restricting member is installed on at least one side of the outer circumference of the rotating shaft, a contact portion is provided on the outer surface of the rotating shaft, and a rotation restricting portion is provided on the rotation angle restricting member, and the rotation angle of the rotating shaft is restricted by the contact between the contact portion and the rotation restricting portion, thus having a simple configuration and allowing the rotation range to be easily changed by replacing the rotation angle restricting member. Furthermore, in the pivot support device according to claim 2, a covering member is installed on the side of the outer circumference of the pivot shaft where the pivot angle regulating member is not installed, so that the contact portion is not exposed to the outside, thereby increasing safety. Furthermore, the rotational support device according to claim 3 is the rotational support device according to claim 1, wherein an object mounting member is provided on the tip side of the rotational shaft, the rotational angle restricting member is installed between the base and the object mounting member, the base is provided with a female screw portion into which a screw member for fixing the rotational angle restricting member is screwed, the rotational angle restricting member is provided with a mounting through hole through which the screw member passes, and when the rotational shaft is rotated and the object mounting member is rotated to a predetermined angle, the screw member can be fastened to or removed from the mounting through hole and the female screw portion, thus allowing for a simpler configuration. Furthermore, the pivot support device according to claim 4 is the pivot support device according to claim 1, wherein the pivot shaft is installed in a through-hole for the pivot shaft that penetrates the base, and the rotation of the pivot shaft is restricted by a pivot fixing part that extends in and out of the through-hole for the pivot shaft, so that the pivot shaft can be fixed at a predetermined rotation angle. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1(a) shows a perspective view of the rotating support device as seen from the rotating lock lever side, and Figure 1(b) shows a perspective view of the rotating support device as seen from the opposite side of the rotating lock lever. [Figure 2]This figure shows one embodiment of the present invention, and is a cross-sectional view taken along line II-II in Figure 1(a). [Figure 3] The figures show one embodiment of the present invention, where Figure 3(a) is a plan view of the base of the rotating support device, Figure 3(b) is a view taken along the line IIIb-IIIb in Figure 3(a), and Figure 3(c) is a view taken along the line IIIc-IIIc in Figure 3(b). [Figure 4] This figure shows one embodiment of the present invention, and is a plan view of the rotating support device with the object mounting member removed. [Figure 5] Figure 5(a) shows a front view of the object mounting member 81, Figure 5(b) shows a view along the Vb-Vb arrow in Figure 5(a), and Figure 5(c) shows a rear view of the object mounting member 81. [Figure 6] The figures show one embodiment of the present invention, where Figure 6(a) is a front view of the rotation angle restricting member, Figure 6(b) is a back view of the rotation angle restricting member, Figure 6(c) is a front view of the cover member, and Figure 6(d) is a back view of the cover member. [Figure 7] This figure shows one embodiment of the present invention, and is a plan view of a rotating support device, in which the rotating shaft and the object mounting member can be rotated to remove the screw for mounting the rotation angle regulating member. [Figure 8] This figure shows one embodiment of the present invention, and is an exploded perspective view with the mounting screws for the rotation angle regulating member of the rotation support device removed. [Figure 9] This figure shows one embodiment of the present invention, and is an exploded perspective view with the mounting screw for the rotation angle restricting member of the rotation support device and the rotation angle restricting member removed. [Figure 10] This figure shows one embodiment of the present invention, a plan view of the rotating support device with the object mounting member removed, and a diagram of the rotating support device with two rotation angle regulating members installed. [Figure 11] This figure shows one embodiment of the present invention, a plan view of the rotating support device with the object mounting member removed, and a diagram of the rotating support device with the installation direction of the rotation angle regulating member and the cover member changed. [Modes for carrying out the invention]

[0010] Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 11. As shown in FIGS. 1 and 2, the rotation support device 1 in this embodiment has a base 3. As shown in FIGS. 2 and 3, a through hole 5 for a rotation shaft is formed in the base 3 so as to extend in the vertical direction in FIG. 2. The upper end side of the through hole 5 for the rotation shaft in FIG. 2 has a reduced diameter, and a stepped portion 7 is provided. Further, a female screw portion 9 is formed on the lower end side of the through hole 5 for the rotation shaft in FIG. 2.

[0011] On both sides in the left - right direction of the base 3 in FIG. 2, through holes 11 for a rotation - fixing lever are provided respectively. The through holes 11 for the rotation - fixing lever extend in the left - right direction in FIG. 2 and open to the outside of the base 3 and the inside of the through hole 5 for the rotation shaft. A female screw portion 13 is formed on the inner peripheral surface of the through hole 11 for the rotation - fixing lever.

[0012] Rotation - fixing levers 15 are installed on both sides in the left - right direction of the base 3 in FIG. 2 respectively. The rotation - fixing lever 15 has a shaft portion 17 as a rotation - fixing portion. A male screw portion 19 is formed on the shaft portion 17, and the male screw portion 19 is screwed into the female screw portion 13. A lever portion 21 is installed on the proximal end side of the shaft portion 17 (on the right side in FIG. 2 for the rotation - fixing lever 15 on the right side in FIG. 2 and on the left side in FIG. 2 for the rotation - fixing lever 15 on the left side in FIG. 2).

[0013] The lever portion 21 is constantly pressed by a spring (not shown), a recess (not shown) formed inside the lever portion 21 is engaged with a protrusion (not shown) of the shaft portion 17, and the rotation of the shaft portion 17 is restricted. In this state, by the user rotating the rotation - fixing lever 15 through the lever portion 21, the rotation - fixing lever 15 and thus the shaft portion 17 can be moved in the left - right direction in the figure. It is also possible to move the lever portion 21 against the elastic force of the spring (not shown) to release the engagement between the protrusion and the recess (not shown) and rotate only the lever portion 21 to change the direction.

[0014] As shown in FIG. 3, engagement portions 31, 33, 35, 37 for a rotation angle regulating member are provided at the edges of the opening on the upper end side (the upper side in FIG. 3(b)) of the through-hole 5 for the rotation shaft of the base portion 3. The engagement portions 31, 33, 35, 37 for the rotation angle regulating member are convex portions protruding upward in FIG. 3(b) of the base portion 3, and are provided at four locations at 90-degree intervals along the edge of the opening of the through-hole 5 for the rotation shaft.

[0015] As shown in FIG. 3(a), female screw portions 41, 43, 45, 47 for attaching a rotation angle regulating member are formed on the outer peripheral side of the opening of the through-hole 5 for the rotation shaft of the base portion 3. Further, on the outer peripheral side of the base portion 3, a plurality (four in this embodiment) of through-holes 49 for attaching a rotation support device are provided.

[0016] A rotation shaft 51 is rotatably installed on the base portion 3. As shown in FIG. 2, the rotation shaft 51 is housed in the through-hole 5 for the rotation shaft of the base portion 3. The tip side (the upper side in FIG. 2) of the rotation shaft 51 has a reduced diameter, and a stepped portion 53 is provided. An annular sliding bearing 55 is inserted between the stepped portion 53 of the rotation shaft 51 and the stepped portion 7 of the through-hole 5 for the rotation shaft.

[0017] A fixing member 57 is installed on the lower side in FIG. 2 of the rotation shaft 51. A male screw portion 54 is formed on the outer peripheral surface of the fixing member 57, and the male screw portion 54 is screwed into the female screw portion 9 of the through-hole 5 for the rotation shaft, and the fixing member 57 is further held by an adhesive. An annular sliding bearing 60 is inserted between the upper surface of the fixing member 57 in FIG. 2 and the lower surface of the rotation shaft 51 in FIG. 2.

[0018] As shown in FIGS. 2 and 4, an object mounting hole 67 extending in the vertical direction in FIG. 2 is formed in the rotation shaft 51. As shown in FIG. 4, the object mounting hole 67 has a horizontal cross-sectional shape in which protrusions 73 are provided on both sides of a central circular portion 71. As shown in FIG. 4, a female screw portion 69 is formed on the upper end surface (the surface on the front side in the paper surface direction in FIG. 4) of the rotation shaft 51.

[0019] As shown in Figures 1 and 2, an object mounting member 81 is fixed to the tip of the pivot shaft 51 (upper end in Figure 2). As shown in Figures 1, 2, and 5, an object mounting hole 85 is also formed in the object mounting member 81, which is continuous with the object mounting hole 67 of the pivot shaft 51. Furthermore, as shown in Figures 5(b) and 5(c), a contact portion 75 is provided protruding from the back surface (the lower surface in Figure 5(b)) of the object mounting member 81. As shown in Figure 4, the contact portion 75 is positioned on the outer circumferential surface side of the upper end side (the front side in the plane of the paper in Figure 4) of the pivot shaft 51. The object mounting member 81 is fixed by passing a fixing screw 87 through the object mounting member 81 and screwing it into the female threaded portion 69 of the pivot shaft 51. As shown in Figure 5, the object mounting member 81 has a through hole 89 for mounting the object. As shown in Figure 5(c), the back side of the object mounting through hole 89 (the front side in the plane of the paper in Figure 5(c)) is enlarged to provide a screw receiving recess 88.

[0020] The above-mentioned rotating support device 1 includes a rotation angle restricting member 91. The rotation angle restricting member 91 is detachably installed on the base 3. As shown in Figure 6(a), for example, the rotation angle restricting member 91 is provided with rotation recesses 93 and 95 on its front side (the side facing the viewer in the plane of the paper in Figure 6). The rotation angle restricting member 91 is provided with a recess 90 for the pivot shaft. When the rotation angle restricting member 91 is installed on the base 3, the pivot shaft 51 is positioned within the recess 90 for the pivot shaft. As shown in Figure 4, the rotation angle regulating member 91 is installed on the outer circumference of the pivot shaft 51, and is positioned so that when the pivot shaft 51 is rotated, the contact portion 75 moves within the rotation recesses 93 and 95.

[0021] A rotation restricting portion 97 is provided between the rotation recesses 93 and 95. The rotation restricting portion 97 is a protrusion located on the outer circumference of the pivot shaft 51, and the contact portion 75 comes into contact with it, restricting the rotation of the pivot shaft 51. Furthermore, mounting through holes 99 and 100 are formed on the outer circumference of the rotation angle restricting member 91. Furthermore, as shown in Figure 6(b), engagement recesses 92, 94, and 96 are formed on the back surface of the rotation angle restricting member 91.

[0022] Furthermore, the rotating support device 1 has a cover member 101. The cover member 101 is detachably installed on the base 3. The cover member 101 has a configuration substantially the same as the rotation angle restricting member 91, but as shown in Figure 6(c), it is provided with a rotation recess 103. As shown in Figure 4, the cover member 101 is installed on the outer circumference side of the rotating shaft 51 where the rotation angle restricting member 91 is not provided, and is positioned so that the contact portion 75 moves within the rotation recess 103 when the rotating shaft 51 is rotated, but there are no protrusions within the rotation recess 103 that the contact portion 75 abuts against. The covering member 101 is provided with a recess 108 for the pivot shaft. When the covering member 101 is installed on the base 3, the pivot shaft 51 is positioned within the recess 108 for the pivot shaft. Furthermore, mounting through holes 105 and 107 are formed on the outer circumference of the covering member 101. Furthermore, as shown in Figure 6(d), engagement recesses 102, 104, and 106 are also formed on the back surface of the cover member 101, similar to the engagement recesses 92, 94, and 96 of the rotation angle restricting member 91.

[0023] As shown in Figure 4, when the rotation angle restricting member 91 is installed, the rotation angle restricting member 91 is fixed by engaging the engaging recess 96 with the engaging portion 33 for the rotation angle restricting member of the base 3, engaging the engaging recess 94 with the engaging portion 35 for the rotation angle restricting member of the base 3, and engaging the engaging recess 92 with the engaging portion 37 for the rotation angle restricting member of the base 3, and then passing the mounting screw 111 through the mounting through hole 99 and screwing it into the female screw portion 47 for mounting the rotation angle restricting member of the base 3, and passing the mounting screw 111 through the mounting through hole 100 and screwing it into the female screw portion 45 for mounting the rotation angle restricting member of the base 3.

[0024] Furthermore, as shown in Figure 4, when the cover member 101 is installed, the cover member 101 is fixed by engaging the engaging recess 102 with the engaging portion 37 for the rotation angle restricting member of the base 3, engaging the engaging recess 104 with the engaging portion 31 for the rotation angle restricting member of the base 3, and engaging the engaging recess 106 with the engaging portion 33 for the rotation angle restricting member of the base 3, and then passing the mounting screw 111 through the mounting through hole 105 and screwing it into the female screw portion 41 for mounting the rotation angle restricting member of the base 3, and passing the mounting screw 111 through the mounting through hole 107 and screwing it into the female screw portion 43 for mounting the rotation angle restricting member of the base 3.

[0025] When removing the rotation angle restricting member 91 and the cover member 101 fixed to the base 3, the rotation shaft 51 and thus the object mounting member 81 are rotated to expose the mounting screw 111 on the upper side (the front side in the plane of the paper in Figure 7), as shown in Figure 7. When the mounting screw 111 is removed, as shown in Figure 8, the rotation angle restricting member 91 and the cover member 101 can be removed, as shown in Figure 9.

[0026] When attaching the rotation angle restricting member 91 and the cover member 101 to the base 3, the rotation angle restricting member 91 and the cover member 101 are inserted between the object mounting member 81 and the base 3, the rotation angle restricting member 91 and the cover member 101 are engaged with the base 3, and the rotation shaft 51 and, consequently the object mounting member 81 are rotated to the state shown in Figure 7, thereby allowing the rotation angle restricting member 91 and the cover member 101 to be fixed to the base 3 by the mounting screws 111.

[0027] Furthermore, screw housing recesses 113 are formed on the outer circumference of the mounting through holes 99 and 100 on the surface side of the rotation angle restricting member 91, and screw housing recesses 115 are formed on the outer circumference of the mounting through holes 105 and 107 on the surface side of the cover member 101. When the rotation angle restricting member 91 and the cover member 101 are fixed to the base 3, the heads of the mounting screws 111 are housed in the screw housing recesses 113 and 115.

[0028] The covering member 101 does not have a configuration that restricts the rotation of the pivot shaft 51, such as the rotation restricting portion 97 of the rotation angle restricting member 91. However, by being installed on the side of the pivot shaft 51 where the rotation angle restricting member 91 is not located, the contact portion 75 located on the outer circumferential surface of the pivot shaft 51 is not exposed.

[0029] Furthermore, as shown in Figure 10, it is also possible to install two rotation angle restricting members 91. In this case, the rotation range of the pivot shaft 51 is the range in which the contact portion 75 is between the rotation restricting portion 97 of one rotation angle restricting member 91 and the rotation restricting portion 97 of the other rotation angle restricting member 91. Furthermore, as shown in Figure 11, the mounting direction of the rotation angle restricting member 91 and the covering member 101 can also be rotated by 90 degrees. Furthermore, although not shown in the diagram, it is also conceivable that the positions of the rotation angle restricting member 91 and the covering member 101 may be swapped from the state shown in Figure 4, or that a different rotation angle restricting member 91 with a different position for the rotation restricting section 97 may be used. In this way, the rotation range of the pivot shaft 51 can be changed by changing the mounting position or orientation of the rotation angle restricting member 91 and the covering member 101, or by replacing the rotation angle member 91 and the covering member 101.

[0030] Next, the operation of this embodiment will be described. The rotating support device 1 is used by fixing an object (not shown) to the object mounting member 81. The object (not shown) is, for example, a monitor, which is provided with a mounting portion that is fixed to the object mounting member 81. When fixing an object (not shown) to the object mounting member 81, a bolt (not shown) is passed through the object mounting through hole 89 of the object mounting member 81 from the lower side of the object mounting member 81 and screwed into the mounting portion of the object (not shown). When the object (not shown) is fixed to the object mounting member 81 by the bolt (not shown), the head of the bolt (not shown) is housed in the screw housing recess 88 of the object mounting member 81. Cables and the like that connected to the object (not shown) are placed in the object mounting hole 85 of the object mounting member 81 and the object mounting hole 67 of the pivot shaft 51. It is also conceivable that a part of the object (not shown) may be inserted into the object mounting hole 85 or the object mounting hole 67.

[0031] The pivot shaft 51 rotates smoothly within the pivot shaft through hole 5 of the base 3 via sliding bearings 55 and 60. When the pivot shaft 51 is rotated, the contact portion 75 located on the outer circumferential surface side of the pivot shaft 51 moves within the rotational recesses 93 and 95 of the rotation angle restricting member 91 and within the rotational recess 103 of the cover member 101.

[0032] The rotation range of the pivot shaft 51 is defined by the rotation restricting portion 97 of the rotation angle restricting member 91. That is, in this embodiment, as shown in Figure 4, the pivot shaft 51 can rotate in the counterclockwise direction in Figure 4 until the contact portion 75 contacts the left side of the rotation restricting portion 97 in Figure 4, and can rotate in the clockwise direction in Figure 4 until the contact portion 75 contacts the right side of the rotation restricting portion 97 in Figure 4.

[0033] The covering member 101 does not have a configuration that restricts the rotation of the pivot shaft 51, such as the rotation restricting portion 97 of the rotation angle restricting member 91. However, by being installed on the side of the pivot shaft 51 where the rotation angle restricting member 91 is not located, the contact portion 75 located on the outer circumferential surface side of the pivot shaft 51 is not exposed.

[0034] The rotation lock lever 15 is rotated via the lever portion 21, moving the shaft portion 17 toward the rotation shaft 51. By bringing the tip of the shaft portion 17 (the left end in Figure 2 for the rotation lock lever 15 on the right in Figure 2, and the right end in Figure 2 for the rotation lock lever 15 on the left in Figure 2) into contact with the outer circumferential surface of the rotation shaft 51, the rotation of the rotation shaft 51 itself is restricted. Furthermore, the restriction on the rotation of the pivot shaft 51 by the rotation fixing lever 15 is released by rotating the rotation fixing lever 15 via the lever portion 21, thereby separating the shaft portion 17 from the pivot shaft 51.

[0035] When attaching or detaching the rotation angle restricting member 91 or the covering member 101, the rotation shaft 51 and, consequently, the object mounting member 81 are rotated to the state shown in Figure 7. In this state, fastening with the mounting screws 111 and removing the mounting screws 111 are performed. Furthermore, by changing the mounting position and orientation of the rotation angle restricting member 91 and the covering member 101, a rotation range different from the rotation range of the pivot shaft 51 shown in Figure 4 can be set, as shown in Figures 10 and 11.

[0036] Next, the effects of this embodiment will be described. Since a rotation angle restricting member 91 that restricts the rotation of the pivot shaft 51 is detachably attached to the base 3, it has a simple configuration, and the rotation range can be easily changed by changing the mounting position and orientation of the rotation angle restricting member 91, or by replacing it. Furthermore, since a cover member 101 is installed on the side where the rotation angle restricting member 91 is not installed, the contact portion 75 located on the outer circumferential surface side of the pivot shaft 51 is not exposed to the outside, thereby enhancing safety.

[0037] Furthermore, the rotation angle restricting member 91 and the covering member 101 are installed between the object mounting member 81 at the tip of the rotation shaft 51 and the base 3. When attaching or detaching the rotation angle restricting member 91 and the covering member 101, the rotation shaft 51 and, consequently, the object mounting member 81 are rotated, which allows for fastening with the mounting screws 111 and removal of the mounting screws 111, thus simplifying the configuration. Furthermore, since a rotation locking lever 15 is provided to restrict the rotation of the rotation shaft 51, the object (not shown) attached to the rotation shaft 51 and, consequently, to the object mounting member 81 can be fixed at a predetermined rotation angle.

[0038] Furthermore, the present invention is not limited to the above-described embodiment. One possible scenario is where a rotation angle restricting member is installed on only one side of the outer circumference of the pivot axis. Furthermore, it is conceivable that the contact portion may be directly attached to the pivot shaft. There are various possible positions, numbers, sizes, and shapes for the rotation angle restricting members and covering members. Furthermore, there are various possible positions, numbers, sizes, and shapes for the rotation restricting parts of the rotation angle restricting member. Furthermore, the number of rotation locking levers can vary; for example, only one may be installed. Furthermore, the diagram shown is just one example, and various configurations are possible. [Industrial applicability]

[0039] The present invention relates, for example, to a rotatable support device for supporting equipment, and more particularly to one that is designed to easily change the range of rotation with a simple configuration, and is suitable, for example, for a support arm for a monitor installed in factory equipment. [Explanation of symbols]

[0040] 1. Rotating support device 3 base 17. Shaft section (rotating fixed section) 41 Female threaded section for mounting rotation angle restricting member 43 Female threaded section for mounting rotation angle restricting member 45 Female threaded section for mounting rotation angle restricting member 47 Female threaded section for mounting rotation angle restricting member 51. Rotary shaft 75 Contact part 81. Mounting component for the object 91 Rotation angle restricting member 97 Rotation Control Unit 99 Through-holes for mounting 100 mounting through holes 101 Covering member 111 Mounting screws

Claims

1. The base and, A pivot shaft is rotatably mounted at the base, A rotation angle restricting member is detachably installed on the outer circumference of the pivot axis of the base mentioned above, It is equipped with, The above rotation angle restricting member is installed at least on one side of the outer circumference of the rotation axis, The outer circumferential surface of the above-mentioned pivot shaft is provided with a contact portion. The above rotation angle restricting member is provided with a rotation restricting section, A rotational support device characterized in that the rotation angle of the rotation shaft is restricted by the contact portion and the rotation restricting portion coming into contact with each other.

2. In the pivot support device according to claim 1, A rotational support device characterized in that a covering member is installed on the outer circumference side of the rotational shaft where the rotational angle restricting member is not installed.

3. In the pivot support device according to claim 1, An object mounting member is provided at the tip of the above-mentioned pivot shaft. The rotation angle restricting member is installed between the base and the object mounting member. The base portion is provided with a female threaded portion into which a screw member for fixing the rotation angle restricting member is screwed. The rotation angle restricting member is provided with a mounting through-hole through which the screw member passes. A rotating support device characterized in that, by rotating the above-mentioned pivot shaft and rotating the above-mentioned object mounting member to a predetermined angle, the screw member can be fastened to or removed from the above-mentioned mounting through hole and the above-mentioned female screw portion.

4. In the pivot support device according to claim 1, The above-mentioned pivot shaft is installed in a through-hole for the pivot shaft that penetrates the above-mentioned base. A pivot support device characterized in that the rotation of the pivot shaft is restricted by a pivot fixing part that extends and retracts inside the through hole for the pivot shaft.

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