JPH0521141Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention makes it possible to maintain displays of office equipment such as word processors and personal computers, or monitor televisions, etc. in a state that is easy for viewers to see or monitor. This invention relates to a height adjustment device.

[Prior art and its problems] In display screens of office equipment or monitor televisions, it is necessary to set the screen at a height that is most convenient for the operator to view, and for this reason, the vertical position of the table on which these items are placed must be adjusted. The height of the screen can be adjusted, or the angle of inclination can be adjusted to adjust the elevation angle relative to the screen.

However, in the conventional mounting table, either the height adjustment or the inclination adjustment is possible, but both cannot be adjusted at the same time.
Furthermore, these adjustments were made in stages using ratchets, hooks, etc., making it more difficult to accurately obtain the optimal height or inclination for the viewer.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to provide an adjustment that allows for adjustment of the inclination and height of an object to be placed on the object with a single device, and also allows these adjustments to be made in a stepless manner. We are in the process of providing equipment.

[Means for Solving the Problems] In order to achieve the above object, the present invention has one end side pivoted on a first shaft, the other end side rotating in the vertical direction, and a placed object on the other end side. an arm on which a receiving member is pivotally supported; a lifting means that urges the arm to rotate upward; and a rod that expands and contracts in accordance with the vertical movement of the arm, and the expansion and contraction of the rod is controlled by the friction of a spring. A friction locking means that locks with force, a release means that releases the frictional force of the friction locking means, and a spring provided on a second shaft that pivotally supports the receiving member on the arm causes the receiving member to move against the arm by the frictional force of a spring. The present invention is characterized by comprising a tilting adjustment means for controlling tilting.

Further, the present invention provides a parallel moving means consisting of a parallelogram link formed by an arm and a link arm provided parallel to the arm, or a fixed pulley fixed to a pivot point of the arm, and a second A parallel moving means is provided which includes a rotary pulley fixed to the shaft and an endless belt stretched between the fixed pulley and the rotary pulley.

[Operation] The arm that rotates in the vertical direction is urged to rotate upward by the lifting means, and stepless height adjustment of the object to be placed is performed by rotating the arm. The friction locking means locks the rotation of the arm against the force of the lifting means and the weight of the object, thereby stopping the object at a predetermined height. The receiving member for the object to be placed is tilted while slipping between the springs due to a load exceeding the frictional force of the spring of the inclination adjustment means, and when the load is released, the tilting is stopped by the frictional force. Therefore, the tilt angle of the object placed on the receiving member is made stepless.

In addition, when the arm rotates, the parallel moving means
The receiving member functions to move in parallel in the vertical direction.

[Example] Hereinafter, the present invention will be described in more detail based on an illustrated example.

Fig. 1 is a perspective view showing the height adjustment device according to the present invention in a standing state, Fig. 2 is a side view thereof, and Fig. 3
The figure is a sectional view of the main part of the pivot point of the arm, Fig. 4 is a sectional view of the friction locking means, Fig. 5 is a sectional view of the main part showing the attachment part of the receiving member for the object to be placed, and Fig. 6 is the swing FIG.

The height adjustment device of this embodiment includes an arm 1 that rotates in the vertical direction, a lifting means 2 that urges the arm 1 to rotate upward, and a friction locking means 3 that locks the rotation of the arm 1. A release means 4 for unlocking the friction lock means 3, an inclination adjustment means 5 for adjusting the inclination of the object to be placed, and a parallel movement means 6 for keeping the inclination of the object to be kept constant when the arm 1 rotates. , and a swinging means 7 for swinging the arm 1 in the horizontal direction to perform a swinging motion.

The arm 1 has a first shaft 1 whose lower end extends over a pair of left and right lower brackets 9 on a base 8.
0 and rotates vertically around the first shaft 10. A receiving member 11 is attached to the upper end of the arm 1, and a placing plate 12 on which objects (not shown) such as office equipment are placed is attached to the receiving member 11. The mounting plate 12 may be omitted, and in this case, the object to be mounted is directly fixed to the receiving member 11. A large-diameter pipe 13 that rotates integrally with the rotation of the arm 1 is fitted onto the first shaft 10, and the lifting means 2 is attached to this pipe 13.

The lifting means 2 consists of a pair of left and right torsion springs 22 and 23 that are externally inserted into the pipe 13 with a spacer 21 attached to the substantially central portion of the pipe 13 as a boundary.
Each torsion spring 22, 23 has one end 22a, 23a abutted on the base 8, and the other end 22b, 23b hooked to the arm 1. These torsion springs 22,
Reference numeral 23 urges the arm 1 to rotate upward, and the arms 1 and 23 are fitted onto the pipe 13 so that the winding directions are opposite to each other. Note that the spacer 21 generates friction noise due to the operation of the torsion springs 22 and 23,
It works to prevent abnormal noises, etc.

The friction locking means 3, as shown in FIG.
A rod 32 is movably inserted into a cylinder 31 serving as an outer cylinder, and the cylinder 31 is pivotally supported by a second shaft 51 of the inclination adjustment means 5, which will be described later, and the rod 32 is rotated by a connecting bracket 33 on the base 8. It is pivoted for free movement. Therefore, as will be described later, the rod 32 moves in the axial direction within the cylinder 31 as the arm 1 rotates to adjust the height of the object to be placed, thereby expanding and contracting the entire length. This friction locking means 3 is secured to the rod 3 by the fastening force of the coil portions of a pair of coil springs 33 and 34 which are fitted onto the rod 32.
This locks the movement of 2. That is, when a tensile force is applied to the rod 32 in the direction of arrow A, the coil spring 33 tilts as shown by the two-dot chain line along the inclined surface of the seat surface of the bush 35, and the coil diameter of the coil portion decreases. As a result, the frictional force between the rod 32 and the rod 32 increases and the movement of the rod 32 is locked, and when a compressive force is applied to the rod 32 in the direction opposite to the direction of arrow A, the coil spring 34 pushes against the seat surface of the bush 36. A tilted tensile force is applied along the line, and it is locked in the same manner as in the case. Then, when the lock release lever 38 is operated in the direction of arrow B, the diameters of the coil springs 33 and 34 are expanded, which releases the lock and allows the rod 32 to move freely in a straight line, allowing adjustment to any position within the stroke range of the rod 32. can. In this case, the coil springs 33 and 34 are expanded evenly by an inner tube 39 that is loosely inserted between the coil springs 33 and the inner circumferential wall of the cylinder 31. In addition, the pivot point between the cylinder 31 of the friction locking means 3 and the second shaft 51, the pivot point between the rod 32 and the connection bracket 33, and the pivot point between the first shaft 10
The pivot points are set to form each vertex of the triangle.

The release means 4 comprises a cable whose one end is connected to the lock release lever 38 of the friction lock means 3, and the other end of this cable is engaged with a plate 41 on the base 8. The cable 4 consists of an outer sheath 42 and a wire 43 inserted into the outer sheath 42,
Both ends of the outer skin 42 are connected to the plate 41 and a plate 44 attached to the arm 1.
On the other hand, one end of the wire 43 is connected to the lock release lever 38 of the friction locking means 3, and a knob 45 is attached to the end on the plate 41 side. Therefore, when the knob 45 is pulled toward the user, the friction locking means 3 is unlocked.

As a result, the arm 1 can freely rotate in the vertical direction with respect to the first shaft 10, and the mounting plate 12 moves up and down by the rotation operation of the arm 1, and the height of the object to be placed is adjusted. In this case, the lifting means 2
The spring force of the torsion springs 22 and 23 is balanced with the weight of the loaded object, and therefore the lifting operation of the loaded object can be performed easily with a small force.

The inclination adjusting means 5 includes a second shaft 51 that rotatably supports the receiving member 11, and a second shaft 51 that rotatably supports the receiving member 11.
Braking members provided on the left and right sides of the shaft 51 are provided. The braking member consists of a fixed member 52 and a movable member 53 that are fitted over the second shaft 51, and a coil spring 54 that is fitted so as to span these members 52 and 53. The fixed member 52 and the movable member 53 are cylindrical bodies having the same external shape, and the coil spring 54 has an inner diameter somewhat smaller than the outer diameter of these members 52 and 53 in a free state. Therefore, the coil spring 54 is installed by extrapolating the coiled portion to both members 52, 53 in a state where the diameter is enlarged. After this extrapolation, when returning to the free state, both members 52, 53 and the coil are attached. Frictional force acts between the spring 54 and the spring 54 . The movable member 52
rotation is locked. Further, a hook portion 54a at one end of the coil spring 54 is inserted so as to penetrate through the fixing member 52 and the second shaft 51, and restricts rotation of the fixing member 52 with respect to the second shaft 51. The lower end of the receiving member 11 is fixed to the movable member 53. Therefore, the rotation of the movable member 53, that is, the adjustment of the inclination of the receiving member 11, is restricted by the frictional force of the coil spring 54. In this case, the other end of the coil spring 54 is a free end. Therefore, when an external force greater than the frictional force of the coil spring 54 is applied to the receiving member 11 or the mounting plate 12, a slip occurs between the coil spring 54 and the movable member 53, thereby making it possible to adjust the inclination of the object. becomes.

The parallel moving means 6 constitutes a parallelogram link with the arm 1 as one element. This parallel movement means 6 includes an arm 1, a lower bracket 9 of a first shaft 10 that pivotally supports the lower end of the arm 1,
It consists of an upper bracket 61 attached to the upper end of the arm 1 together with the second shaft 51, and a link arm 62 whose upper and lower ends are pivoted to the lower bracket 9 and the upper bracket 61 so as to be parallel to the arm 1. The upper and lower ends of the link arm 62 are connected to each bracket 9, 61 by a pin 63.
is supported by. In such a parallel moving means 6, the angle of the parallelogram changes according to the rotation of the arm 1, so that the upper bracket 61 rotates without changing its inclination angle. Therefore, arm 1
When rotating, the object placed on the receiving member 11 is
It moves in parallel in the vertical direction while maintaining the same inclination angle, thereby making it possible to prevent the placed object from falling and to adjust the height.

As shown in FIG. 5, the swinging means 7 is configured by a fixing pin 71 provided between the base 8 and a base 14 that supports the base 8, and a screw 73 screwed into the base 14. It consists of a rotating pedestal 72 connected to a fixed pin 71, and the rotating pedestal 72 is made of synthetic resin or the like so as to generate an appropriate frictional force with the base 8. In such a structure, when a horizontal external force is applied to the base 8, the base 8 rotates on the rotating pedestal 72.
The robot rotates in a horizontal plane on the base 14 around the center. This makes it possible to adjust the swing of the object.

Next, the operation of this embodiment will be explained.

First, in the height adjustment device placed in a folded state, an object to be placed, for example, a display of office equipment such as a word processor or a personal computer, or a monitor television is placed on the placing plate 12. The height of the placed object is adjusted by pulling the knob 45 of the release means 4 toward you. By this operation, the lock of the friction locking means 3 to which the lock release lever 38 is connected to the cable 4 is released, and the lifting means 2 is unlocked.
The arm 1 is urged to rotate in the standing direction by the springs 22 and 23. Since the spring force of the torsion springs 22, 23 of the lifting means 2 and the weight of the object to be placed are balanced, such raising operation can be performed with extremely small force. On the other hand, to lower the height of the placed object,
The arm 1 is rotated downward, but since the torsion springs 22, 23 and the weight of the object to be placed are balanced, this operation can be performed with extremely small force. Therefore, the operating force required for height adjustment is small, and the operation is easy. This vertical rotation of the arm 1 is performed by the rod 32 of the friction locking means 3 expanding and contracting. After the desired height is obtained, when the knob 45 is released, the extension and contraction operation of the rod 32 of the friction locking means 3 is locked by the frictional force, so the rotation of the arm 1 is stopped and the arm 1 is held at that height position. The placed object is held. Such height adjustment is achieved by using friction locking means 3 to stop the arm 1 from rotating.
Since this is done by locking the height, stepless adjustment is possible and adjustment to the optimum height is possible.
Here, when rotating the arm 1, the parallel moving means 6
As a result, the receiving member 11 is held parallel to the base 8, thereby preventing the placed object from falling.

Further, the inclination angle of the object placed at a desired height can be adjusted as follows.

Since the receiving member 11 on which the object is placed is stopped from tilting by the frictional force generated between the coil spring 54 of the inclination adjusting means 5 and the movable member 53, it is not possible to apply a load exceeding the frictional force. , when applied to the receiving member 11, the receiving member 11 tilts around the second shaft 51 while slipping between the coil spring 54 and the movable member 53. Then, when the load is released, the tilting of the receiving member 11 is stopped by the frictional force, so that the inclination of the object placed on the receiving member 11 can be adjusted.

7 and 8 show other embodiments of the parallel moving means. The parallel moving means 80 of this embodiment is the arm 1
A fixed pulley 81 fixed to both ends of the first shaft 10 serving as a pivot for the receiving member 11, a rotating pulley 82 fixed to both ends of the second shaft 51 serving as a pivot for the receiving member 11, It consists of an endless belt 83 stretched between 81 and 82. In this embodiment configured in this way, when the arm 1 is rotated in the A direction as shown in FIG. 7, the mounting plate 12 is lowered. Since it does not rotate, belt 8
Tensions in directions A and C, which are opposite to each other, are applied to the opposing portions of belts 83, and the belt 83 rotates in the same direction. This rotation of the belt 83 rotates the second shaft 51 which rotates together with the rotation pulley 82, and also rotates the receiving member 11 in the opposite direction to the arm 1 via the inclination adjustment means 5. In this way, in this embodiment, as the arm 1 rotates, the receiving member 11 is rotated in the opposite direction to the arm 1 by the amount of rotation of the arm 1. It can be moved in parallel in the vertical direction.

In the manner described above, the desired height and inclination angle of the placed object can be easily and steplessly adjusted.

[Effects of the invention] In the present invention, the arm is rotatably attached to the first shaft to adjust the height, and this rotation is locked by the frictional force of the friction locking means, so that the object to be placed can be The height can be adjusted steplessly. Further, the receiving member attached to the arm is rotatably attached to the second shaft, and
In order to stop this rotation by the frictional force of the spring,
The tilt angle of the placed object can be adjusted steplessly. Therefore, it is possible to adjust the inclination and height of the object to be placed using one device, and these adjustments can be made steplessly. Furthermore, when a parallel movement means is provided, there is also an effect that the object to be placed can be vertically moved in parallel while keeping the same attitude when adjusting the height of the object to be placed.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the device of the present invention in a standing state, Fig. 2 is a side view thereof, Fig. 3 is a cross-sectional view of the main part of the pivot portion of the arm in the folded state, and Fig. 4 is a cross-section of the friction locking means. 5 is a cross-sectional view of the main part showing the attachment part of the receiving member for the object to be placed, FIG. 6 is a cross-sectional view of the main part showing the swinging part, and FIG. 7 is a perspective view showing another embodiment of the present invention. 8 are principal part sectional views showing the attachment portion of the receiving member same as above. DESCRIPTION OF SYMBOLS 1... Arm, 2... Lifting means, 3... Friction locking means, 4... Release means, 5... Inclination adjustment means, 6, 80... Parallel movement means, 10... First shaft, 11... ... Reception member, 22, 23 ... Torsion spring, 51 ... Second shaft, 54 ... Spring, 62 ... Link arm, 81 ... Fixed pulley, 82 ... Rotating pulley, 83 ... Endless belt .

Claims (1)

[Claims for Utility Model Registration] 1. An arm whose one end side is pivotally supported by a first shaft, whose other end side is pivotable in the vertical direction, and at which a receiving member for a placed object is pivotally supported at the other end side; A lifting means that urges the arm to rotate upward; a friction locking means that expands and contracts the rod following the vertical movement of the arm and locks the expansion and contraction of the rod by a spring frictional force; and this friction locking means. and an inclination adjusting means for controlling the tilting of the receiving member with respect to the arm by the frictional force of a spring, which is provided on a second shaft that pivotally supports the receiving member on the arm. A height adjustment device featuring: 2. The height adjusting device according to claim 1, further comprising a parallel moving means comprising a parallelogram link formed by two arms and a link arm provided parallel to the arms. 3 Parallel movement consisting of a fixed pulley fixed to the pivot point of the arm, a rotating pulley fixed to the second shaft, and an endless belt stretched between the fixed pulley and the rotating pulley. A height adjusting device according to claim 1, further comprising means.