JPH0521140Y2 - - 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 the present invention, one end side is pivotally supported by the first shaft, the other end side is pivoted in the vertical direction, and a receiving member for the object to be placed is pivotally supported on the other end side. The arm that has been
It has a lifting means for urging the arm to rotate upward, and a clutch spring stretched between a fixed shaft and a movable shaft provided on the first shaft, and the arm is raised by the frictional force of the clutch spring. a locking means for locking the rotation of the arm; a releasing means for releasing the frictional force of a clutch spring of the locking means; and a releasing means for releasing the frictional force of a clutch spring of the locking means; The above object is achieved by including an inclination adjustment means for suppressing the tilting of the receiving member. Further, in addition to the above configuration, the present invention has a link means formed by the arm and a link arm provided parallel to the arm.

[Operation] The arm that rotates in the vertical direction is rotated upwardly by the lifting means, and stepless height adjustment of the object to be placed is performed by rotating the arm. The locking means locks the rotation of the arm against the force of the lifting means and the weight of the object to be placed, thereby stopping the object at a predetermined height. The receiving member for the object to be placed is tilted while slipping between it and the spring 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. For this reason, the tilting angle of the object placed on the receiving member is made stepless.

The link means connects the arm and the receiving member so that the object to be placed moves vertically in parallel when the arm rotates.

[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 its highest standing state; Fig. 2 is a side view of the same device in its lowest folded state;
Fig. 3 is a sectional view of the main part of the pivot point of the arm, Fig. 4 is a sectional view of the main part showing the attachment part of the receiving member for the object to be placed, and Fig. 5 is a sectional view of the main part showing the swinging means. .

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, a locking means 3 that locks the rotation of the arm 1, and a locking means 3 that locks the rotation of the arm 1. A release means 4 for unlocking the means 3, an inclination adjustment means 5 for adjusting the inclination of the object to be placed, a link means 6 for keeping the inclination of the object to be kept constant when the arm 1 rotates, and an arm 1. Swinging means 7 for performing swinging motion by horizontally rotating the
It is equipped with

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 upward about 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. Such a mounting plate 12
may be omitted; in this case, the object to be placed is directly fixed to the receiving member 11. Note that a large-diameter pipe 13 that rotates integrally with the rotation of the arm 1 is inserted into the first shaft 10, and this pipe 1
The lifting means 2 is attached to 3.

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 in contact with the base 8, and the other end 22b, 23b (2
3b (not shown) is hooked to the arm 1.
These torsion springs 22 and 23 urge the arm 1 to rotate upward, and are fitted onto the pipe 13 so that their winding directions are opposite to each other. Note that the spacer 21 is connected to the torsion springs 22 and 23.
The function is to prevent scraping noises, abnormal noises, etc. caused by the operation of the

The locking means 3 are provided on the left and right sides of the first shaft 10 inserted into the pipe 13. The locking means 3 is a fixed shaft 3 inserted onto the first shaft 10.
1 and a movable shaft 32, and a clutch spring 33 made of a rectangular wire rod and having a coil portion thereof inserted onto the shafts 31 and 32. The fixed shaft 31 and the movable shaft 32 are molded to have the same outer diameter, and the inner diameter of the coil portion of the clutch spring 33 is somewhat smaller than the outer diameter of these shafts 31 and 32 in a free state. Therefore, the clutch spring 33 is installed by extrapolating its coil portion to the fixed shaft 31 and the movable shaft 32 in a state where the diameter is expanded.After this extrapolation, when the clutch spring 33 is returned to the free state, both shafts 31, Frictional force acts between 32 and clutch spring 33. This frictional force locks the rotation of the movable shaft 32. Since the lower end of the arm 1 is fixed to the movable shaft 32, the rotation of the arm 1 together with the movable shaft 32 is locked. In order to perform such locking, the clutch spring 33 is set to have a frictional force greater than the spring force of the torsion springs 22 and 23 of the lifting means 2, and the clutch springs 33 provided on both the left and right sides of the first shaft 10 are 33,3
3 are arranged so that the winding direction is the same, and rotation of the arm 1 in both the vertical direction is locked. Note that a hook portion 33a at one end of the clutch spring 33 is inserted through the fixed shaft 31 and the first shaft 10, and the fixed shaft 31 is integrated with the first shaft 10, so that its rotation is controlled. suppressed. Further, the other end 33b of the clutch spring 33 is hooked to a proximal end portion of a cable 41 of a release means 4, which will be described later.

The release means 4 includes the cable 41 and a lever 42 rotatably attached to the mounting plate 12, and the tip of the cable 41 is connected to the lever 42. Therefore, when the lever 42 is operated in the direction of the arrow in FIG. 2, the coil portion of the clutch spring 33 expands in diameter via the cable 41. This diameter expansion reduces the frictional force generated between the clutch spring 33 and the movable shaft 32. This causes arm 1 to
The mounting plate 12 can be freely rotated in the vertical direction with respect to the shaft 10, and the mounting plate 12 is moved up and down by the rotation operation of the arm 1, and the height of the object to be mounted is adjusted. In this case, the spring force of the torsion springs 22, 23 of the lifting means 2 is balanced with the weight of the placed object, and therefore the lifting operation of the placed object can be performed lightly 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 relationship between the fixed member 52, the movable member 53 and the coil spring 54 is that the fixed shaft 32 in the locking means 3 and the clutch spring 3
This is the same as the relationship in point 3. Therefore, the coil spring 54
The inner diameter of the coil part is the fixed member 52 and the movable member 5.
The hook portion 54a at one end of the coil spring 54 is inserted through the fixing member 52 and 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, the coil spring 54 and the movable member 53
A slip is generated between the two, and this makes it possible to adjust the inclination of the object.

The link means 6 consists of a parallelogram link of which the arm 1 is one element. This link means 6 includes an arm 1, a lower bracket 9 of a first shaft 10 which pivotally supports the lower end of the arm 1, an upper bracket 61 attached to the upper end of the arm 1 together with a second shaft 51, and an upper bracket 61 of the arm 1. A link arm 6 whose upper and lower ends are pivoted to a lower bracket 9 and an upper bracket 61 so as to be parallel to the lower bracket 9 and the upper bracket 61.
It consists of 2. The upper and lower ends of the link arm 62 are pivotally supported by pins 63 on the respective brackets 9 and 61. The angle of the parallelogram of the link means 6 changes according to the rotation of the arm 1, so that the upper bracket 61 rotates without changing its inclination angle. Therefore, when the arm 1 rotates, the object placed on the receiving member 11 moves in parallel in the vertical direction while maintaining the same inclination angle, preventing the object from falling and increasing the height. It is possible to adjust the

The oscillating means 7 is provided with a fixed pin 71 provided between the base 8 and a base 14 that supports the base 8.
and a rotating support 72 connected to a fixed pin 71 by a screw 73 screwed into the base 14.
The rotary support 72 is made of synthetic resin or the like so as to generate an appropriate frictional force with the base 8. In this structure, when a horizontal external force is applied to the base 8, the base 8 rotates around the rotary support 72 and moves in the direction of the base 14.
This allows the base 8 to rotate horizontally.
The upper arm 1 rotates, allowing for swivel adjustment.

Next, the operation of this embodiment will be explained.

First, in the height adjustment device (Figs. 2 and 3) placed in the folded state, the placed object,
For example, a display of office equipment such as a word processor or a personal computer, or a monitor television is placed on the mounting plate 12. The height of the placed object can be adjusted using the release means 4.
This is done by operating the lever 42 in the direction of the arrow in FIG. This operation causes the clutch spring 33 of the locking means 3 connected to the cable 41 to expand in diameter, so that the movable shaft 32 is released from its frictional force. Thereby, the arm 1 is rotated upward so as to stand up, and the height is adjusted. Such a raising operation can be performed with an extremely small force since the arm 1 is rotated upward by the torsion springs 22 and 23 of the lifting means 2 and is balanced with the weight of the object to be placed. On the other hand, in order to lower the placed object, arm 1
This operation can be performed with an extremely small force since the torsion springs 22, 23 and the weight of the object to be placed are balanced. Therefore, the operating force required for height adjustment is small, and the operation is easy. After the desired height is obtained, when the lever 42 is released, the clutch spring 33 generates a frictional force with the rotation shaft 32 due to the restoring force of the clutch spring 33, so that the arm 1 connected to the rotation shaft 32 rotation stops, and the object to be placed is held at that height position. This kind of height adjustment is possible with arm 1.
Since this is done by rotating the height, stepless adjustment is possible and adjustment to the optimum height is possible. Here, when the arm 1 is rotated, the receiving member 11 is held parallel to the base 8 by the link means 6, so that the object to be placed is prevented from falling. Note that the lever 42 returns to its original position by the restoring action of the clutch spring 33.

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. , receiving member 1
1, the receiving member 11 tilts around the second shaft 51 while slipping between the coil spring 5 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.

In this manner, the desired height and inclination angle of the object to be placed can be easily adjusted in a stepless manner.

Although the above embodiment includes the link means 6 and the swing means 7, the present invention allows the same adjustment even if these are omitted.

[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 clutch spring.
The height of the placed object can be adjusted steplessly. In addition, since the receiving member attached to the arm is rotatably attached to the second shaft and this rotation is restrained by the frictional force of the spring, the tilting angle of the 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 the link means is provided, there is also an effect that when adjusting the height of the placed object, the placed object can be moved in parallel in the vertical direction while keeping the same attitude.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the device of the present invention in the standing state, Fig. 2 is a side view of the same device in the folded state, Fig. 3 is a cross-sectional view of the main part of the pivot point of the arm in the folded state, and Fig. 4 is the main part of the device in the folded state. FIG. 5 is a cross-sectional view of the main part showing the attachment part of the receiving member for the object to be placed, and FIG. 5 is a cross-sectional view of the main part showing the swinging part. DESCRIPTION OF SYMBOLS 1... Arm, 2... Lifting means, 3... Locking means, 4... Release means, 5... Inclination adjustment means, 6
... linking means, 10 ... first shaft, 11
... Reception member, 22 ... Torsion spring, 31 ... Fixed shaft, 32 ... Movable shaft, 33 ... Clutch spring, 5
1...Second shaft, 54...Spring, 62...
link arm.

Claims (1)

[Claims for Utility Model Registration] 1. An arm whose one end side is pivotally supported by a first shaft and whose other end side rotates in the vertical direction, and at which a receiving member for a placed object is pivotally supported; It has a lifting means for urging the arm to rotate upward, and a clutch spring stretched between a fixed shaft and a movable shaft provided on the first shaft, and the arm is raised by the frictional force of the clutch spring. a locking means for locking the rotation of the arm; a releasing means for releasing the frictional force of a clutch spring of the locking means; and a releasing means for releasing the frictional force of a clutch spring of the locking means; 1. A height adjustment device comprising: an inclination adjustment means for controlling tilting of a receiving member. 2. The height adjustment device according to claim 1, further comprising a link means formed by the arm and a link arm provided parallel to the arm.