JPH0613143Y2 - Turntable - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a turntable for rotating various products, and more particularly to a safe turntable that does not rotate carelessly.

[Conventional technology and its problems]

In a production factory, a turntable is used as a means for rotating various products, changing the conveying direction, and changing the inspection surface. In this turntable, as shown in FIG. 2, a horizontal circular table 1 is rotatably provided in a ground pit P, and a product is conveyed and placed on the circular table 1 by a conveyor or the like. The product is rotated by turning table 1.

In this turntable, when a person carelessly rides on the circular table 1, the circular table 1 rotates and the foot is caught, causing an accident such as a fall. For this reason, conventionally, as shown in FIG. 2, when not in use, the pawl 3 provided on the wall of the pit P is locked in the locking hole 2 formed at the required peripheral edge of the circular table 1. There is. However, this locking work is troublesome, and the claws 3 are often left without being locked, and the fall accident is likely to occur.

[Purpose of device]

The present invention has been made in consideration of the above points, and an object of the present invention is to provide a turntable that does not rotate when a person gets on it but can rotate only when a product is placed.

[Means for achieving the purpose]

In order to achieve the above-mentioned object, in the turntable of the present invention, a horizontal circular table is rotatably and vertically movable on a vertical shaft in a ground pit, and an engaging surface is provided on the top of the shaft. A clutch plate fixed downward, and a clutch fixed on the lower part of the circular table with an engagement surface facing upward through a sleeve fitted vertically slidably on a spring case fitted on the shaft. The plate is engaged with the spring housed in the spring case with an urging force larger than a person's weight, and the engagement is disengaged when a load exceeding the weight is applied to the circular table.

Here, since this kind of turntable should not rotate carelessly when a person gets on it, the clutch plate is engaged by the biasing force of the spring larger than the body weight, and the load exceeding the body weight is The spring is selected and configured so that when applied on the table the clutch disengages and the rotary table rotates.

[Action]

The turntable configured in this way does not disengage the clutch when a person rides on it, and the circular table does not rotate. The table can rotate to effect product rotation.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. 1 of the accompanying drawings.

As shown in the figure, a horizontal circular table 10 is fitted on a central shaft 12 of a base 11 in the ground pit P. A spring case 13 is rotatably fitted to the shaft 12, and the spring case 13 is used for the thrust bearing 1
It is rotatably supported by the base 11 via 4. Further, a sleeve 15 screwed to the circular table 10 is fitted in the spring case 13 so as to be vertically movable.

One clutch plate 16a of the engaging clutch 16 is screwed to the upper end of the shaft 12 via a leaf spring 17, while the other clutch plate of the clutch 16 is provided on the upper surface of the sleeve 15 so as to face the clutch plate 16a. 16b is formed, and by engaging both clutch plates 16a and 16b, the shaft 12 and the rotary table 10 are integrated via the clutch 16.

With the coil spring 13a in the spring case 13, the clutch 16 is normally provided with both clutch plates 16a,
16b is in the engaged state, and the circular table 10 is lowered against the spring 13a, so that the clutch plates 16a and 16b are disengaged. The spring 13
The urging force of a is set to be larger than the descending force to the circular table 10 due to the weight of the person. When the person rides on the circular table 10, the circular table 10 does not descend and the clutch 16 does not disengage. When a heavy product is placed on the rotary table 10, the rotary table 10 is lowered and the clutch 16 is disengaged.
Further, when the circular table 10 is largely lowered by placing the product, a large step is generated between the upper surface of the ground and the upper surface of the circular table 10 and it becomes difficult to take out the product.
The gap G between a and the spring case 13 is set to the clutch 1
6 is only removed.

This embodiment is configured as described above, and the clutch 16 cannot be disengaged even when a person is placed on the rotary table 10.
0 never rotates. Therefore, even if a person carelessly gets on the rotary table 10, an accident such as a fall does not occur.

On the other hand, when the product is placed on the rotary table 10, the load causes the rotary table 10 to descend and the clutch 16 to disengage.
The rotary table 10 can rotate and can rotate the product.

[Effect of device]

Since the present invention is configured as described above and the circular table is prevented from rotating under the weight of a person, it is possible to provide a safe turntable in which an accident such as a fall does not occur.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of a turntable according to the present invention, and FIG. 2 is a cutaway perspective view of a conventional example. 1, 10 ... Rotary table, 12 ... Shaft, 13 ... Spring case, 13a ... Spring, 16 ... Engaging clutch, 16a, 16b ... Clutch plate.

Claims (1)

[Scope of utility model registration request] 1. A clutch plate fixedly mounted on a vertical shaft in a ground pit so as to be rotatable and vertically movable, and fixed to the top of the shaft with its engaging surface facing downward.
A clutch plate, which is fixed to the lower portion of the circular table with the engaging surface facing upward through a sleeve that is slidably fitted in a spring case fitted to the shaft, is fixed in the spring case. A turntable characterized in that the spring is engaged with an urging force larger than a person's weight, and the engagement is released when a load exceeding the weight is applied to the circular table.