JP2011106533A - Apparatus support arm - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stably hold an apparatus such as a monitor and the like in a position which a user desires for a long period of time. <P>SOLUTION: In this apparatus support arm, each of monitor arms 1 is connected to a hinge device 2 and a lock device 3. The hinge device 2 has a bearing 21 and a shaft 22 which are formed at connecting ends of the arms, and the lock device 3 has a lock member 30 which can be locked to the outside of the bearing 21 arranged at the one-end side of the shaft 22 to receive the one-end side of the shaft 22, a lock lever 35 which is pivoted to the other end side of the shaft 22, and has a cam-shaped part 33 which can press the outside of the bearing 21 for receiving the other end side of the shaft 22; and washers 32, 37 which are interposed between the bearing 21 for receiving the other end side of the shaft 22 and the cam-shaped part 33 of the lock lever 35. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a device support arm that supports a monitor, a personal computer, a television, and other various devices so as to be movable in the front-rear direction, the vertical direction, and the left-right direction.

  Conventionally, various devices such as monitors, personal computers, and televisions are installed and used by various types of device support arms in offices and homes, and in automobiles and other vehicles, airplanes, ships, and the like. Generally, a device support arm is connected to a plurality of arms so that they can be rotated with each other via a hinge device, and each arm can be held at an arbitrary rotation angle via a lock device. Is fixed to the attachment destination, various devices are attached to the arm on the distal end side, and various devices are movably installed on the attachment destination within the range of the length of each arm. This kind of device support arm is proposed by, for example, Japanese Patent Application Laid-Open No. H10-228707. The support arm of this document 1 is connected so that a plurality of arms can rotate via a joint portion (corresponding to a hinge device and a lock device) having a rotation resistance, and an information monitor is pivotally supported at the tip of the support arm. The information monitor is held in a desired direction.

JP-A-9-326980

  However, in the conventional device support arm, each joint member between a plurality of arms is constituted by a hinge mechanism that imparts a friction resistance action between each arm using a disc spring, a washer, etc., and the friction resistance action of this joint member Because the load of each arm and the load of various other devices alone is received, the load is large with respect to the ability to hold the angle between each arm of the joint member, and while using this support arm In addition, the ability to support various devices such as a monitor gradually decreases, and there is a problem that the device is gradually lowered and cannot be stably held for a long time at a predetermined position requested by the user.

  The present invention solves such a conventional problem, and provides an excellent device support arm that can stably hold a monitor and other various devices at a predetermined position requested by a user for a long time. The purpose.

In order to achieve the above object, the present invention is configured such that a plurality of arms are connected to each other via a hinge device so that the arms can be held at an arbitrary rotation angle via a lock device, In a device support arm in which a base arm is fixed to a mounting destination, various devices are mounted on a distal arm, and various devices are mounted on the mounting destination in a range of the length of each arm. The hinge device includes a bearing formed at a connection end of each arm and a shaft inserted between the bearings of each arm, and the hinge device allows the arms to move forward and backward or vertically. The locking device is connected to the outer end of the bearing that is provided on one end side of the shaft and receives the one end side of the shaft; Pivoted on the end side to the shaft A lock lever having a cam-shaped portion capable of pressing the outer side of the bearing receiving the other end side inwardly, and interposed between the bearing receiving the other end side of the shaft and the cam-shaped portion of the lock lever. Each of the arms is configured to press and hold the bearing between the lock member and the cam-shaped portion by rotating the lock lever in a direction in which the cam-shaped portion presses the bearing. The bearing is locked at an arbitrary rotation angle, and the lock lever is rotated in a direction in which the cam-shaped portion releases the pressure against the bearing, thereby the bearings between the lock member and the cam-shaped portion. The gist is to release the pressing and clamping to release the lock between the arms.
In the present invention, it is preferable that each unit has the following configuration.
(1) A washer is interposed between the bearing that receives one end of the shaft and the lock member.
(2) The bearing of each arm is composed of a pair of bearing portions having shaft insertion portions, and the interval between the pair of bearing portions of one arm adjacent to each other is formed larger than the interval between the pair of bearing portions of the other arm. The pair of bearing portions of the other arm is fitted between the pair of bearing portions of the one arm so that the shaft cores of the respective shaft insertion portions are aligned, and a collar is provided between the pair of bearing portions of the other arm. Is interposed so as to be able to communicate with each of the shaft insertion portions, and the shaft is inserted between the pair of bearing portions through the shaft insertion portions and the collar.
(3) A fixing base for supporting and fixing the entire arm to the attachment destination is provided on the arm on the base end side.
(4) A pedestal for attaching various devices to the arm on the distal end side is provided.

  The apparatus support arm according to the present invention includes a hinge device having a bearing formed at a connecting end of each arm and a shaft inserted between the bearings of each arm. The locking device is connected to the shaft, and can be engaged with the outside of the bearing that receives one end of the shaft, and the other end of the shaft. A lock lever having a cam-shaped portion pivotally attached to the shaft and capable of pressing the outside of the bearing receiving the other end of the shaft inward, and a bearing receiving the other end of the shaft and a cam-shaped portion of the lock lever. And a washer interposed between them, and by rotating the lock lever in the direction in which the cam-shaped portion presses the bearing, the bearings are pressed and clamped between the lock member and the cam-shaped portion. Because it was locked at any rotation angle With these hinge and lock devices, each arm can be adjusted to an arbitrary angle and firmly fixed, and the monitor and other various devices can be stably held for a long time at a predetermined position requested by the user. Can do. In addition, by rotating the lock lever in the direction in which the cam-shaped portion releases the pressure on the bearing, it is possible to unlock the bearing between the lock member and the cam-shaped portion and release the lock between the arms. In addition, it is possible to easily change and adjust the angle between the arms.

Plan sectional drawing of the apparatus support arm in one embodiment of this invention Side sectional view of the equipment support arm The figure which shows the movement of each arm of the apparatus support arm ((a) The top view which shows the state which rotates each arm to the left-right direction and adjusts between each arm to an arbitrary angle (b) A side view showing a state in which the arm is turned up and down and adjusted between each arm to an arbitrary angle) (A) Plan sectional drawing of the apparatus support arm in other embodiment of this invention (b) Same side sectional drawing

  Next, embodiments for carrying out the present invention will be described with reference to the drawings. In this embodiment, the device support arm is exemplified as an in-vehicle monitor arm for installing the monitor in a vehicle such as a passenger car or a truck. In the following description, the device support arm is referred to as a monitor arm. Called.

  As shown in FIG. 1 and FIG. 2, the monitor arm 1 has a plurality of arms 11, 12, 13, 14 that can be rotated with each other via the hinge device 2, and each arm 11, 12, 13, 14 is locked. It is connected via the device 3 so as to be held at an arbitrary rotation angle. The base 11 is provided with a fixing base 4 for supporting and fixing the entire arms 11 to 14 in an attachment destination vehicle compartment (such as an instrument panel) via the hinge device 2 and the lock device 3. A pedestal plate 5 for attaching a monitor is provided on the side arm 14.

In this case, the plurality of arms 11, 12, 13, and 14 are configured by four arms, and include a proximal-side arm 11, two central arms 12 and 13, and a distal-side arm 14.
The proximal arm 11 is formed in a short, substantially rectangular tube shape having a predetermined length whose front and rear end surfaces are opened by a steel plate. In the case of this arm 11, a bearing 21 of the hinge device 2 is formed at the front connection end. Therefore, the front ends of the left and right side surfaces are projected in a generally curved shape toward the front, and the shaft insertion portion 201 is formed in the approximate center of each of the projections, so that a pair of bearing portions 202 are formed in the vertical direction. Further, in order to form the bearing 21 of the hinge device 2 at the rear connection end, the rear ends of the upper and lower surfaces are protruded in a substantially curved shape, and the shaft insertion portion 201 is formed in the approximate center of each protrusion. Thus, the pair of bearing portions 202 are formed in the horizontal direction.
One arm 12 at the center is formed in a long, substantially rectangular tube shape having a predetermined length with front and rear end faces opened by a steel plate. In the case of this arm 12, a bearing 21 of the hinge device 2 is formed at the connecting end on the front side. For this purpose, the front ends of the left and right side surfaces are projected in a generally curved shape toward the front, and a shaft insertion portion 201 is formed in the approximate center of each projection so that a pair of bearing portions 202 are formed in the vertical direction. Further, in order to form the bearing 21 of the hinge device 2 at the rear connection end, the rear ends of the left and right side surfaces are projected in a substantially curved shape toward the rear, and shafts are formed at the approximate centers of the respective projections. A pair of bearing portions 202 are formed in the vertical direction by being pierced through the insertion portion 201. Further, in the case of this arm 12, the width of the left and right sides of the central arm 12 is determined so that the protruding portion at the rear end of both sides can be fitted between the protruding portions at the front end of both sides of the arm 11 on the base end side. The width of the left and right sides of the end arm 11 is slightly smaller (in other words, the width of the left and right sides of the base arm 11 is slightly larger than the width of the left and right sides of the central arm 12).
The other arm 13 at the center is formed into a short, substantially rectangular tube shape having a predetermined length with front and rear end surfaces opened by a steel plate. In the case of this arm 13, a bearing 21 of the hinge device 2 is formed at the front connection end. Therefore, the front ends of the upper and lower surfaces are projected in a substantially curved shape toward the front, and a shaft insertion portion 201 is formed in the approximate center of each of the projections, so that a pair of bearing portions 202 are formed in the horizontal direction. In addition, in order to form the bearing 21 of the hinge device 2 at the rear connection end, the rear ends of the left and right side surfaces protrude in a substantially curved shape, and the shaft insertion portion 201 is drilled in the approximate center of each protrusion. Thus, the pair of bearing portions 202 are formed in the vertical direction. Further, in the case of this arm 13, the protrusions at the front end of both side surfaces of one arm 12 can be fitted between the protrusions at the rear end of both side surfaces, and the widths of the left and right sides of the other arm 12 at the center are the center. The width of the left and right sides of one arm 12 is slightly larger. The arm 13 is formed in a shape and size symmetrical to the proximal arm 11 with the central arm 12 interposed therebetween.
The arm 14 on the front end side is formed in a U-shaped cross section with a steel plate, a mounting hole 140 for mounting the pedestal plate 5 is formed in the vertical front end surface, and the bearing 21 of the hinge device 2 is formed on the rear connection end. In order to achieve this, the rear ends of the upper and lower surfaces are protruded in a substantially curved shape, and the shaft insertion portion 201 is formed in the approximate center of each of the protrusions, so that a pair of bearing portions 202 are formed in the horizontal direction. . Further, in the case of this arm 14, the protrusions at the front ends of the upper and lower surfaces of the other arm 13 at the center can be fitted between the protrusions at the rear ends of the upper and lower surfaces, so The height is slightly larger than the heights of the upper and lower sides of the other arm 13 at the center.

The fixing base 4 is formed of a steel plate with a U-shaped cross section, and a mounting hole 40 for mounting and fixing with a bolt or the like is formed in a vertical rear end face with a bolt or the like, and the bearing 21 of the hinge device 2 is provided at the front connecting end. In order to form, the front ends of the upper and lower surfaces are protruded in a substantially curved shape, and a shaft insertion portion 201 is formed in the approximate center of each protrusion, so that a pair of bearing portions 202 are formed in the horizontal direction. . In the case of the fixed base 4, the protrusions at the rear ends of the upper and lower surfaces of the central arm 12 can be fitted between the protrusions at the front ends of the upper and lower surfaces. Is slightly larger than the height of the upper and lower sides of one arm 12 at the center. The fixed base 4 is formed in a shape and size symmetrical to the distal arm 14 with the arms 12 and 13 at the center interposed therebetween.
The pedestal plate 5 is formed of a steel plate into a substantially rectangular flat plate shape having a predetermined size, a circular recess 51 is formed at the center thereof, and a bolt insertion hole 52 is formed at the center thereof.

The hinge device 2 includes a bearing 21 formed at a connection end of each arm 11, 12, 13, 14 and a shaft 22 inserted through each bearing 21 of each arm 11, 12, 13, 14. In this case, the bearings 21 of the arms 11, 12, 13, and 14 are composed of a pair of bearing portions 202 having the shaft insertion portions 201 as described above, and the pair of bearing portions 202 of one arm adjacent to each other. The interval is formed slightly larger than the interval between the pair of bearing portions 202 of the other arm, and the pair of bearing portions 202 of the other arm is formed to be fitted between the pair of bearing portions 202 of the one arm. . Then, the pair of bearing portions 202 of the other arm is fitted between the pair of bearing portions 202 of one arm so that the shaft cores of the respective shaft insertion portions 201 are aligned, and the collar 23 is interposed between the pair of bearing portions 202 of the other arm. Are inserted into the respective shaft insertion portions 201 so as to communicate with each other, and the shaft 22 is inserted between the respective bearings 21 through the respective shaft insertion portions 201 and the collars 23. By the hinge device 2, the arms 11, 12, 13, and 14 are connected to each other so as to be able to rotate in the front-rear direction, the up-down direction, or the left-right direction.
The lock device 3 is provided at one end of the shaft 22 of the hinge device 2, and can be engaged with the outside of the bearing 21 that receives one end of the shaft 22, and the bearing 21 and the lock member 30 that receive one end of the shaft 22 A disc spring 31 and a washer 32 interposed between the shaft 22 and a lock having a cam-shaped portion 33 pivotally attached to the other end of the shaft 22 and capable of pressing the outer side of the bearing 21 receiving the other end of the shaft 22 inward. The lever 35, the bearing 21 that receives the other end of the shaft 22, and the disc spring 36 and the washer 37 that are interposed between the cam-shaped portion 33 of the lock lever 35, are configured integrally with the hinge device 2. In this case, the shaft 22 employs a pin having a flange at one end, and the flange is used as the lock member 30. Further, a shaft insertion portion 220 for pivotally supporting the cam-shaped portion 33 of the lock lever 34 is formed at a right angle with respect to the axial direction at the other end of the shaft 22. The lock lever 35 includes a cam-shaped portion 33 and an operation lever 34. The cam-shaped portion 33 has shaft insertion portions 330 at eccentric positions on both sides, and is located at the center of the cam surface 331 (around the cam-shaped portion 33). A groove 332 in which the other end of the shaft 22 can be fitted is formed, and the operation lever 34 is extended in an appropriate direction from the vicinity of the end portion of the cam surface 331 of the cam-shaped portion 33. The lock lever 35 is fitted on the other end of the shaft 22 through the groove 332 of the cam-shaped portion 33, and the shaft 333 is passed between the cam-shaped portion 33 and the shaft insertion portions 330, 220 of the shaft 22, thereby forming the cam-shaped portion. The part 33 is mounted on the other end of the shaft 22 so as to be rotatable in the direction of pressing the outer side of the bearing 21 that receives the other end of the shaft 22 by the operation of the operation lever 34 or in the opposite direction (releasing direction of the pressing). It is done.

In the case of this monitor arm 1, a plurality of arms 11, 12, 13, 14 are connected by the hinge device 2 as follows.
One arm 12 at the center is connected to the proximal arm 11 via the hinge device 2 so as to be pivotable in the front-rear direction or the vertical direction. In this case, the pair of bearing portions 202 of one arm 12 at the center is fitted between the pair of bearing portions 202 of the arm 11 on the base end side so that the shaft cores of the respective shaft insertion portions 201 are aligned with each other. The collar 23 is interposed between the pair of bearing portions 202 so as to be able to communicate with each shaft insertion portion 201, and the shaft insertion portions 201 of each one bearing portion 202 on one side and each bearing portion 202 on the other side are also combined. Washers 38 are respectively interposed between the shaft insertion portions 201, and each of the bearings 21 of the arms 11, 12, in this case, a dish between the bearing portion 202 on one side of the arm 11 on the base end side and the lock member 30. The shaft 22 is connected to each bearing via a disc spring 36 and a washer 37 between the bearing portion 202 on one side of the arm 11 on the base end side and the cam-shaped portion 33 of the lock lever 35 via the spring 31 and the washer 32. Each shaft insertion part 201 between 21 Each washer 32 and 37, each of the disc springs 31 and 36, are inserted through the respective washers 38, and collar 23. In this case, a coil spring 39 is wound around the collar 23 and both ends thereof are respectively locked to the proximal arm 11 and the central arm 12 so as to be against the proximal arm 11. One arm 12 at the center can move up and down and can be held at an arbitrary rotation angle.
The other arm 13 at the center is connected to the one arm 12 at the center via the hinge device 2 so as to be rotatable in the front-rear direction or the up-down direction. In this case, the pair of bearing portions 202 of the central one arm 12 is fitted between the pair of bearing portions 202 of the other central arm 13 so that the shaft cores of the respective shaft insertion portions 201 are aligned with each other. The collar 23 is interposed between the pair of bearing portions 202 so as to be able to communicate with each shaft insertion portion 201, and the shaft insertion portions 201 of each one bearing portion 202 on one side and each bearing portion 202 on the other side are also combined. Washers 38 are respectively interposed between the shaft insertion portions 201, and a dish is provided between one of the bearings 21 of each arm 12, 13, in this case, one bearing portion 202 of the other arm 13 at the center and the lock member 30. A pair of shafts 22 is connected to each other via a disc spring 36 and a washer 37 between a bearing portion 202 on one side of the other arm 13 at the center and a cam-shaped portion 33 of the lock lever 35 via a spring 31 and a washer 32. Between bearings 21 Each shaft insertion portion 201, each washer 32 and 37, each of the disc springs 31 and 36, are inserted through the respective washers 38, and collar 23. In this case, the coil spring 39 is wound around the collar 23, and both ends thereof are respectively locked to the central one arm 12 and the central other arm 13, so that the central one arm 12 is protected. The other arm 13 at the center is movable up and down and can be held at an arbitrary rotation angle.
The arm 14 on the distal end side is connected to the other arm 13 at the center via the hinge device 2 so as to be rotatable in the left-right direction. In this case, the pair of bearing portions 202 of the other arm 13 at the center is fitted between the pair of bearing portions 202 of the arm 14 on the distal end side so that the shaft cores of the respective shaft insertion portions 201 are aligned. A collar is interposed between the pair of bearing portions 202 so as to be able to communicate with each shaft insertion portion 201, and also between each shaft insertion portion 201 of each bearing portion 202 on one side and each shaft insertion of each bearing portion 202 on the other side. Washers 38 are respectively interposed between the portions 201, and the disc springs 31 and 31 are provided between one of the bearings 21 of the arms 13 and 14, in this case, one of the bearing portions 202 of the arm 14 on the distal end side and the lock member 30. The shaft 22 is interposed between the pair of bearings 21 via the disc spring 36 and the washer 37 between the bearing portion 202 on the other side of the arm 14 on the distal end side and the cam-shaped portion 33 of the lock lever 35 via the washer 32. Each shaft insertion part 20 Each washer 32 and 37, each of the disc springs 31 and 36, are inserted through the respective washers 38, and collar 23.

In addition, the fixed base 4 is connected to the base-side arm 11 by the hinge device 2 as follows, and the base plate 5 is connected to the distal-side arm 14 by the bolt 53 and the nut 54 as follows. Is done.
An arm 11 on the base end side is connected to the fixed base 4 via the hinge device 2 so as to be rotatable in the left-right direction. In this case, the pair of bearing portions 202 of the arm 11 on the base end side is fitted between the pair of bearing portions 202 of the fixed base 4 with the axis of each shaft insertion portion 201 aligned, and the pair of arms 11 on the base end side is fitted. The collars 23 are interposed between the bearing portions 202 so as to be able to communicate with the shaft insertion portions 201, and the shaft insertion portions of the one bearing portion 202 on one side and the shaft insertion portions of the other bearing portion 202 on the other side. A washer 38 is interposed between the two parts 201, and a disc spring is provided between one of the bearings 21 of the fixed base 4 and the arm 11 on the base end side, in this case, one bearing portion 202 on one side of the fixed base 4 and the lock member 30. The shaft 22 is connected between each pair of bearings 21 via a disc spring 36 and a washer 37 between the bearing portion 202 on one side of the fixed base 4 and the cam-shaped portion 33 of the lock lever 35 via the bearing 31 and the washer 32. Each shaft insertion part 201, each seat 32 and 37, each of the disc springs 31 and 36, are inserted through the respective washers 38, and collar 23.
The pedestal plate 5 is superimposed on the front surface of the front end surface of the arm 14 on the distal end side, the mounting hole 140 of the arm 14 on the distal end side is aligned with the bolt insertion hole 52 of the pedestal plate 5, and the bolt 53 is placed in these holes 140, 52. Is passed from the front of the front end surface of the arm 14 and is screwed onto the nut 54 on the back side of the front end surface of the arm 14 on the front end side through the washer 55, and the base plate 5 is attached to the front end surface of the arm 14 on the front end side. Fixed.

In this way, the monitor arm 1 is fixed in the vehicle compartment by the fixed base 4, and the monitor is attached to the pedestal plate 5 provided in the arm 14 on the distal end side, and the monitor is installed in the vehicle compartment in the arms 11, 12, 13, 14 It can be moved (adjusted) within the range of length. The position of the monitor is adjusted between the arms 11, 12, 13, and 14 of the monitor arm 1 at an arbitrary angle of the user, and this is fixed by the lock device 3.
That is, between the fixed base 4 and the base end side arm 11, as shown in FIG. 3A, the base end side arm 11 can turn to the left and right directions via the hinge device 2. Therefore, the space between the fixed base 4 and the base end side arm 11 is adjusted to an arbitrary angle of the user, and this is fixed by the lock device 3. In the case of the fixed base 4 and the base end side arm 11 (see FIG. 2), the lock lever 35 is rotated in a direction in which the cam-shaped portion 33 presses the other bearing portion 202 on one side of the fixed base 4 ( The shaft 22 is pulled in the direction of the cam-shaped portion 33 between the lock member 30 and the cam-shaped portion 33), and between the lock member 30 and the cam-shaped portion 33 via the collar 23, the fixed base 4 and the proximal end side. Each bearing portion 202 of the arm 11 is pressed and clamped to lock between the fixed base 4 and the arm 11 on the base end side at an arbitrary rotation angle of the user.
Between the proximal arm 11 and the central arm 12, as shown in FIG. 3 (b), the central arm 12 is connected to the proximal arm 11 via the hinge device 2 in the front-rear direction. Or since it is connected so that it can rotate in the up-down direction, the space between the arms 11 and 12 is adjusted to an arbitrary angle of the user, and this is fixed by the lock device 3. In the case of the proximal arm 11 and the central arm 12 (see FIG. 1), the lock lever 35 is rotated in a direction in which the cam-shaped portion 33 presses the other bearing portion 202 of the proximal arm 11. By moving (the shaft 22 is pulled in the direction of the cam shape portion 33 between the lock member 30 and the cam shape portion 33), each arm is interposed between the lock member 30 and the cam shape portion 33 via the collar 23. The bearing portions 202 of 11 and 12 are pressed and clamped to lock the proximal end side arm 11 and the central arm 12 to an arbitrary rotation angle of the user.
Between the central one arm 12 and the central other arm 13, as shown in FIG. 3B, the central other arm 13 is connected to the central one arm 12 via the hinge device 2 in the front-rear direction. Or since it is connected so that rotation in the up-down direction is possible, the space between the arms 12 and 13 is adjusted to an arbitrary angle of the user, and this is fixed by the lock device 3. In the case of the one arm 12 at the center and the other arm 13 at the center (see FIG. 1), the lock lever 35 is rotated in a direction in which the cam-shaped portion 33 presses the other bearing portion 202 on one side of the other arm 13 at the center. By moving (the shaft 22 is pulled in the direction of the cam shape portion 33 between the lock member 30 and the cam shape portion 33), each arm is interposed between the lock member 30 and the cam shape portion 33 via the collar 23. The bearing parts 202 of 12 and 13 are pressed and clamped, and the space between the central arm 12 and the central other arm 13 is locked at an arbitrary rotation angle of the user.
As shown in FIG. 3A, between the other arm 13 at the center and the arm 14 at the front end side, the arm 14 at the front end side rotates in the left-right direction via the hinge device 2 as shown in FIG. Since it is movably connected, the space between the arms 13 and 14 is adjusted to an arbitrary angle of the user, and this is fixed by the lock device 3. In the case of the other arm 13 at the center and the arm 14 at the distal end side (see FIG. 2), the lock lever 35 is rotated in a direction in which the cam-shaped portion 33 presses the one bearing portion 202 at the other end of the arm 14 at the distal end side. (The shaft 22 is pulled in the direction of the cam-shaped portion 33 between the lock member 30 and the cam-shaped portion 33), and each arm 13, between the lock member 30 and the cam-shaped portion 33 via the collar 23, 14 bearing portions 202 are pressed and clamped, and the space between the other arm 13 at the center and the arm 14 on the distal end side is locked at a user's arbitrary rotation angle.
When the rotation angle is changed between the fixed base 4 and the arm 11 on the base end side or between the arms 11, 12, 13, and 14, the cam-shaped portion 33 is connected to each bearing by the cam-shaped portion 33. By rotating in the direction in which the pressing of the portion 202 is released and releasing the pressing and clamping of each bearing portion 202 between the lock member 30 and the cam-shaped portion 33, the fixed base 4 and the proximal-side arm 11 After the lock state between the arms 11, 12, 13, 14 is released and the angle of each part is adjusted again, as described above, each lock device 3 may be locked.

  As described above, according to the monitor arm 1, the hinge device 2 includes the bearing 21 formed at the connecting end of each arm 11, 12, 13, 14 and each arm 11, 12, 13, 14. And a shaft 22 inserted between the bearing portions 21, and by the hinge device 2, the arm arms 11, 12, 13, 14 are connected to each other so as to be pivotable in the front-rear direction, the vertical direction, or the left-right direction, The device 3 is provided on one end side of the shaft 22 and is engageable with the outside of the bearing 21 that receives one end side of the shaft 22, and between the bearing 21 that receives one end side of the shaft 22 and the lock member 30. A lock lever having a disc spring 31 and a washer 32 interposed between them and a cam-shaped portion 33 pivotally attached to the other end side of the shaft 22 and capable of pressing the outer side of the bearing 21 receiving the other end side of the shaft 22 inward. 35 and the other end side of the shaft 22 A disc spring 36 and a washer 37 are provided between the bearing 21 to be received and the cam-shaped portion 33 of the lock lever 35, and the lock lever 35 is rotated in a direction in which the cam-shaped portion 33 presses the outside of the bearing 21. As a result, the bearings 21 are pressed and clamped between the lock member 30 and the cam-shaped portion 33 (via the collar 23) to lock the arms 11, 12, 13, and 14 at an arbitrary rotation angle. As a result, the hinge device 2 and the lock device 3 can be used to adjust the arms 11, 12, 13, and 14 to arbitrary angles and firmly fix them. It is long and stable at a predetermined position. Further, by rotating the lock lever 35 in the direction in which the cam-shaped portion 33 releases the pressure on the bearing 21, the holding of each bearing 21 between the lock member 30 and the cam-shaped portion 33 is released and each arm is released. Since the lock between 11, 12, 13, and 14 can be released, the change and adjustment of the angle between the arms 11, 12, 13, and 14 can be easily performed.

  In this embodiment, the monitor arm 1 is exemplified as a two-joint type composed of four arms 11, 12, 13, and 14. However, the number of arms can be changed as necessary. The rotation angle between the arms can be arbitrarily changed. FIG. 4 shows one joint type constituted by three arms 11, 12, and 13. This monitor arm is different from the above embodiment only in that the base end side arm and the central one arm are combined into one, and the other configuration is the same as the above embodiment. Even if it does in this way, the effect similar to the said embodiment can be acquired substantially.

1 Monitor arm (equipment support arm)
11 Arm 12 on the base end side One arm 13 on the center 13 Arm on the other side 14 Arm 140 on the tip end side Mounting hole 2 Hinge device 21 Bearing 201 Shaft insertion portion 202 Bearing portion 22 Shaft 220 Shaft 23 Color 3 Lock device 30 Lock member 31 Disc spring 32 Washer 33 Cam-shaped portion 330 Shaft insertion portion 331 Cam surface 332 Groove 333 Shaft 34 Operation lever 35 Lock lever 36 Disc spring 37 Washer 38 Washer 39 Coil spring 4 Fixed base 40 Mounting hole 5 Base plate 51 Recess 52 Bolt insertion Hole 53 Bolt 54 Nut 55 Washer

Claims (5)

A plurality of arms are connected to each other via a hinge device, and the arms are connected to each other so as to be held at an arbitrary rotation angle via a lock device, and a base end side arm is fixed to an attachment destination, Various equipment is attached to the arm on the distal end side, and the equipment support arm that installs various equipment to the attachment destination in a range of the length of each arm,
The hinge device is
A bearing formed at the connecting end of each arm;
A shaft inserted between the bearings of the arms;
With
By the hinge device, the arms are connected to each other so as to be able to rotate in the front-rear direction, the up-down direction, or the left-right direction,
The locking device is
A locking member provided on one end side of the shaft and engageable with the outside of the bearing for receiving one end side of the shaft;
A lock lever having a cam-shaped portion pivotally attached to the other end of the shaft and capable of pressing the outside of the bearing receiving the other end of the shaft inward.
A washer interposed between the bearing that receives the other end of the shaft and the cam-shaped portion of the lock lever;
With
By rotating the lock lever in a direction in which the cam-shaped portion presses the bearing, the bearings are pressed and clamped between the lock member and the cam-shaped portion, and the arms can be freely rotated between the arms. Lock to the moving angle,
By rotating the lock lever in a direction in which the cam-shaped portion releases the pressure on the bearing, the pressure clamping of the bearings is released between the lock member and the cam-shaped portion, and the arms To release the lock between,
A device support arm characterized by that.   The equipment support arm according to claim 1, wherein a washer is interposed between the bearing that receives one end of the shaft and the lock member.   The bearing of each arm is composed of a pair of bearing portions having a shaft insertion portion, and the interval between the pair of bearing portions of one arm adjacent to each other is formed larger than the interval between the pair of bearing portions of the other arm, The pair of bearing portions of the other arm is fitted between the pair of bearing portions of the one arm so that the shaft cores of the respective shaft insertion portions are aligned, and the collar is interposed between the pair of bearing portions of the other arm. The equipment support arm according to claim 1, wherein the equipment support arm is interposed so as to be able to communicate with the shaft insertion portion, and the shaft is inserted between the pair of bearing portions through the shaft insertion portions and the collar.   The equipment support arm according to any one of claims 1 to 3, further comprising a fixing base for supporting and fixing the entire arm to the attachment destination on the proximal end side arm.   The equipment support arm according to any one of claims 1 to 4, further comprising a pedestal for attaching various equipment to the distal arm.

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