JPS5911636Y2 - Desk top plate elevation adjustment device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a desk top elevation adjustment device, and its purpose is to enable the top to be raised and lowered steplessly and to simplify operation.

In conventional desk top lift adjustment devices, both lifting rods installed vertically on the lower surfaces of the left and right sides of the top plate can be raised and lowered independently, and the lifting rods are separately attached to raise and lower them in stages at predetermined vertical intervals. The top plate is held at a desired height by operating the stopper.

Therefore, the left and right lifting rods cannot be operated synchronously, which causes wobbling when adjusting the elevation, and because the elevation is done in stages, it is impossible to freely select the elevation height, and for this purpose, separate stoppers must be installed on both sides. However, the structure is complicated and operation is troublesome, and especially when adjusting the height, the top plate must be raised and lowered vertically and the stoppers on both sides must be operated at the same time, which is complicated as multiple people have to adjust the height. It was left behind.

This proposal discloses an improvement plan to solve the above-mentioned conventional drawbacks, and the main point is that a rack or other rotating gear that is constantly engaged with the lifting rods at both ends is installed between the left and right lifting rods. A rotary operation shaft with a member attached thereto is installed so that both lifting rods, that is, the top plate can be raised and lowered in a stepless and continuous manner, and both the left and right lifting rods can be raised and lowered synchronously to facilitate the raising and lowering operation. At the same time, it is possible to prevent rattling and generation of noise.

The present invention will be explained in detail below with reference to the attached embodiments. First, the two main members constituting the present device, the lifting rods 1 and 2 and the rotary operation shaft 3, are attached to the desk top plate. A fixed cylinder 5, which is hung downward from the lower surface of both left and right ends of the desk main body A, and which is attached to the desk main body A and acts as a support leg or a mere holding tube.
The holes 7 are fitted into the upper end opening of the holes 7 so as to be expandable and retractable in the vertical direction, and the front or rear side walls thereof have a large number of holes 7 at regular intervals.
or the protrusion is formed vertically in a straight line, and furthermore, a vertical groove 8 with an open bottom end is formed in the inner wall of the hole 7.
・It has a notch shape that extends to approximately the same height as the upper end.

Next, the rotary operation shaft 3 connects its both ends to the fixed cylinders 5 and 6.
It penetrates the rotation support hole and the vertical groove 8 of the lifting rods 1 and 2 and protrudes into the lifting rod, and the protruding end has the holes 7 on the outer periphery.
A rack or other rotary engagement member 9 having teeth or protrusions to be engaged with is fixedly installed.

As mentioned above, the rotary operation shaft 3 is constantly engaged with both the left and right lifting rods 1 and 2 in order to synchronize the lifting and lowering of the left and right lifting rods 1 and 2.
The rotation operation mechanism has a spiral groove 10 on the outer peripheral surface of the operation shaft 3.
is recessed and covers the operating shaft 3.
A long groove 12 in the longitudinal direction is formed in the front wall of the connecting rod 11 installed and fixed therebetween, and a rear end protrusion 14 is formed in the long groove 12 as shown in FIG. 10 is swingably attached to the slider 13, and by sliding the lever 15 of the slider 13 to the left or right along the long groove 12, the rear end protrusion 14 of the slider is slid in the spiral groove 10, thereby rotating the rotary operation shaft 3 and the rotary engagement member 9, thereby raising and lowering both the lifting rods 1 and 2 by the same distance at the same time, thereby adjusting the top plate 4 to a desired height.

In addition, when the weight of the top plate becomes large, such as when a bookshelf or the like is installed on the top plate 4, the weight is applied to the lifting rods 1 and 2, and this causes the rotary operation shaft 3 to rotate inadvertently, causing the top plate to If there is a possibility that the slider 13 may not be retained, the recesses 12 for retaining the slider 13 are inserted at predetermined intervals on the upper edge side of the long groove 12, as shown in FIG.
'..., and the slider may be latched by the recesses 12', thereby preventing rotation of the rotary operation shaft 3.

The desk top elevation adjustment device of the present invention as described above is simple, in that the rotary operation shaft 3 engaged with both the elevation rods 1 and 2 is made rotatable by the sliding engagement of the slider 13 and the spiral groove 10. With this basic structure, the lifting and lowering operations of both lifting rods 1 and 2 can be synchronized, which not only prevents rattling and noise generation during lifting and lowering, but also allows the slider 13 to continuously slide in the left and right directions. Since the height of the top plate 4 can be raised and lowered steplessly and continuously, the height of the top plate 4 can be set freely, and there is no need for any member such as a stopper to hold it at a predetermined height position. The rotation of the operating shaft 3, that is, the lifting rod 1
, 2 is a simple structure and easy-to-operate elevating adjustment device that has various effects such as reliably preventing the top plate 4 from falling.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view showing an embodiment of the main structure of the present invention, FIG. 2 is a cutaway perspective view of the same, and FIG. 3 is an imaginary perspective view of a desk showing an example of application of the present device. A... Desk body, 1, 2... Lifting rod, 3
...Rotary operation axis, 4...Top plate, 5, 6
....Fixed tube, 7.. Hole, 8.. Vertical groove, 9.. Rotating engagement member, 10.. Spiral groove, 11.. ...Connecting rod, 12...Long groove, 13...Slider, 14...Rear end protrusion, 15...Leno

Claims (1)

[Scope of utility model registration request] A spiral groove is formed on the outer periphery of a rotary operating shaft that constantly engages with both lifting rods hanging downward on the lower surface of the left and right ends of the desk top plate to raise and lower them, and a horizontal groove is formed in the spiral groove. A desk top elevation adjustment device made by fitting a slider that can slide only in one direction.