JPH0632901Y2 - 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 table 1 by a conveyor or the like. Rotate the product by turning 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 pawls 3 provided on the wall of the pit P are locked in the locking holes 2 formed at the required peripheral edge intervals 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 object, in the turntable of the present invention, a horizontal circular table is rotatably supported by its central axis in the ground pit, and a load on the circular table is detected at the lower end of the central axis. And a brake means for switching between rotatable and non-rotatable of the rotary table according to an output signal of the load cell. The brake means corresponds to the output signal corresponding to a load heavier than a person's weight. Thus, the rotary table is configured to be rotatable.

The braking means comprises a brake shoe that is pressed against the side surface of the circular table and an actuator that moves the brake shoe toward and away from the circular table. The actuator outputs the output signal corresponding to a load heavier than the weight of the person. The brake shoe can be separated from the side surface of the circular table by means of the above, or it can be constituted by an electromagnetic brake operated by the output signal.

[Action]

The turntable configured in this way uses the output signal of the load cell when a person gets on as a reference, and since the output signal of a person does not exceed that reference, the braking means keeps the circular table non-rotating. The table does not rotate. On the other hand, when a product weighing more than the weight of a person is placed, the output signal from the load cell changes more than the reference, and the change causes the brake means to rotate the circular table and the turntable can rotate, thereby rotating the product. You can do it.

〔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, in the ground pit P, a horizontal circular table 10 is rotatably supported by a central shaft 15 via a thrust bearing 16, and the load cell 11 is mounted below the central shaft 15 via a thrust bearing 16. When a load is placed on the circular table 10 due to a product placed on it, the load cell 11 detects the load.

A brake shoe 18 is provided on the inner surface of the pit P facing the side surface of the circular table 10 so as to be able to move forward and backward with respect to the circular table 10. A plurality of brake shoes 18 are arranged facing each other through the circular table 10 and are always Are pressed against the circular table 10 by springs (not shown), and are advanced and retracted by solenoids 19, respectively. Each solenoid 19 is connected to the load cell 11 via a brake 17 such as an amplifier. When the load cell 11 detects a pressure equal to or higher than a required pressure, the output signal energizes the solenoid 19 to retract the brake shoe 18, causing the rotary table 10 to move. The braking of is released. That is, the output signal of the load cell 11 does not become discriminated when the person rides on the circular table 10, and when a load larger than the maximum weight of the person is applied, the load cell 11
Outputs a large output signal and is discriminated and the rotary table 10 energized by the solenoid 19 becomes rotatable.

This embodiment is configured as described above, and when a person rides on the rotary table 10, the solenoid 19 does not operate, the brake shoe 18 does not separate from the rotary table 10, and the rotary table 10 does not rotate. Therefore, the circular table 10
Even if a person carelessly rides in the car, no accident such as a fall will occur.

On the other hand, when the product is placed on the circular table 10, the output of the load cell 11 increases due to its weight, and the output is discriminated and the solenoid 19 operates to activate the brake shoe 1.
8 moves away from the rotary table 10 and the rotary table 10 can be rotated to effect the rotation of the product.

Although the brake is constituted by the brake shoe 18 provided with the solenoid 19 in the embodiment, it may be constituted by an electromagnetic brake.

[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.

Further, by changing the sharply set value, the rotatable / non-rotatable point of the rotary table can be selected with an arbitrary load.

[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 ... Circle table, 11 ... Load cell, 15 ...
… Shaft, 16… Thrust bearing, 17… Controller,
18 ... Brake shoe, 19 ... Solenoid.

Claims (3)

[Scope of utility model registration request] 1. A horizontal circular table 10 in a ground pit P.
Is rotatably supported by its central axis 15 and its central axis 15
The load cell 1 for detecting the load on the rotary table 10
1 is provided, and a brake means for switching between rotatable and non-rotatable of the circular table 10 according to an output signal of the load cell 11 is provided, and the brake means corresponds to the output signal corresponding to a load heavier than a person's weight. By the circular table 10
A turntable characterized by being rotatable. 2. The utility model registration claim (1), wherein the brake means is a brake shoe 18 pressed against the side surface of the rotary table 10 and an actuator for contacting and separating the brake shoe 18 with the rotary table 10. It consists of 19 and
The turntable is characterized in that the actuator 19 separates the brake shoe 18 from the side surface of the circular table 10 by the output signal corresponding to a load heavier than the weight of the person. 3. A turntable according to claim (1) of the utility model registration, wherein the braking means is constituted by an electromagnetic brake which is operated by the output signal.