JPS588101Y2 - Top plate lifting device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for lifting and lowering the top of a desk, table, etc., which raises and lowers the top.

Conventionally, a wire rope or the like has been used to raise and lower the top plate, and the drive uses friction, which has the disadvantage of causing slippage.

The object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and provide a reliable and safe top lifting device that does not slip.

In this invention, one end of the chain is attached to an inner cylinder with an open cross section that supports the top plate and is slidably inserted into the outer cylinder via a guide roller, and the other end of the chain is attached to a counterweight device. , is a top plate lifting device characterized by having an intermediate portion hooked onto a drive sprocket.

To explain the present invention with reference to the drawings, the top plate 1
is pivotally attached to the frame body 2 and is raised and lowered by a lifting device 3.

The lifting device 3 is connected to an outer tube 4, an inner tube 5, a chain 6, a drive device, and a weight device, and is pivotally connected to the frame 2 and the top plate 1 at the lower end of the outer tube 4 and the upper end of the inner tube 5, respectively. ing.

The outer cylinder 4 is a cylinder with a substantially square cross section, into which the inner cylinder 5 is inserted.

The inner cylinder 5 is a square cross-section cylinder with one side open, and the open side has a flange 7 on the outside.

The outer cylinder 4 is provided with a guide roller 8 and a guide roller 10 that rotates freely around the drive shaft 9 at the upper part, and guide the corner part 11 and the flange 7 of the inner cylinder 5, respectively, and the one-way cylinder 5. Guide rollers 12 and 13 are provided on the upper and lower surfaces of the lower end, and these guide rollers allow the inner cylinder 5 to slide in and out of the outer cylinder 4.

As for the driving device, a driving sprocket 16 is provided at the shaft end of a prime mover 15 such as an electric motor with a reduction gear attached to a frame 14 integrated with the outer cylinder 4, and a driving sprocket 16 is provided on an upper bearing 17 of the outer cylinder 4 so as to freely rotate. A driving chain 19 is suspended between the supported drive shaft 9 and an intermediate sprocket 18 fixed to it.

The drive shaft 9 is equipped with a drive sprocket 20 that rotates integrally with the drive shaft 9 and a guide roller 10 that rotates freely.

There is a flange 2 at the end of the boss part (drive sprocket) 20.
1 is inserted into the open part of the inner cylinder 5 and serves as a guide for the inner cylinder 5 in the left and right direction.

One end of the chain 6 is attached to a pin at the bottom of the inner cylinder 5,
The other end is attached to one end of the support rod 22 of the weight device, and the middle part is hooked to the drive sprocket 20.

The weight device includes a support rod 22 supported on a frame body 2 at a universal fulcrum 23 so as to be able to swing three-dimensionally;
The weight 24 can be installed in any position on the top plate 1.
The position of the weight 24 is changed depending on the weight of the weight, etc., and the weight 24 is fixed at a place with the best balance for practical use.

25 is a guide for the support rod 22. 26 and 27 are limit switches and strikers that restrict the movement of the inner cylinder 5.

The guide plate 28 prevents the guide roller 12 from moving inward and prevents the open portion of the inner cylinder 5 from narrowing.

When the prime mover 15 is rotated in the forward or reverse direction, the drive shaft 9 and the drive sprocket 20 are rotated by the drive chain 19, and the inner cylinder 5 is inserted and removed via the chain 6, and the top plate 1
tilts up and down.

Since the driving medium is a chain, there is no slippage at all, and reliable operation can be achieved with a simple mechanism.

Further, since a part of the chain 6 is enclosed within the inner tube 5, it is safe.

Furthermore, by replacing the drive sprocket 20 with one having a different number of teeth, the speed at which the inner cylinder 5 is inserted and removed can be changed.

When attaching the prime mover 15 to the frame 14, if the hole is made into an elongated hole so that the position of the prime mover 15 can be changed, the above-mentioned insertion/removal speed can be changed by replacing the intermediate sprocket 18, making replacement easy. .

In this invention, one end of the chain is attached to an inner cylinder with an open cross section that supports the top plate and is slidably inserted into the outer cylinder via a guide roller, and the other end of the chain is attached to a counterweight device. , by hooking the middle side to the drive sprocket,
It is possible to provide a tabletop elevating device that can operate reliably and safely without slippage, and has extremely great practical effects.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a side view when the top plate is horizontal, FIG. 4 is a side view when the top plate is tilted, FIG. 3 is a front view showing the weight device, and FIG. Figure 4 is a side view and a sectional view taken along the line II-I in Figure 6. Figure 5 is a side view showing how the driving chain is attached and is a view taken along the line II-II in Figure 6. FIG. 4 is a sectional view taken along the line III-III, and FIGS. 7 and 8 are sectional views taken along the IV-IV line and the ■-■ line in FIG. 4, respectively. 1...Top plate, 3...Elevating device, 4...
...Outer cylinder, 5...Inner cylinder, 6...Chain, 7...Flange, 8, 10, 12゜1
3... Guide roller, 9... Drive shaft,
16...Motive sprocket, 18...
Intermediate sprocket, 19...Motive chain, 2
0... Drive sprocket, 24... Weight.

Claims (1)

[Scope of utility model registration request] One end of the chain is attached to an inner tube with an open cross section that supports the top plate and is slidably inserted into the outer tube via a guide roller, and the other end of the chain is attached to a counterbalancing weight device. A top plate lifting device characterized by hanging on a driving sprocket.