JPS6225074B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is aimed at improving the safety of large moving equipment used to prevent accidents and collisions in which people or objects are caught in mechanical equipment that moves in various ways, such as vehicle-mounted spot welding machines. It is related to the device.

Conventional large-scale equipment of this type does not have any special safety mechanisms to prevent collisions or entanglement, and relies on secondary measures such as protective barriers around the machinery to prevent entry. Furthermore, it is not easy to attach safety devices to conventional large, movable devices, and there has been a demand for the development of a pinch prevention mechanism as a safety measure for work.

The present invention is to enable a moving large-scale device to immediately stop the large-scale device without causing damage to people or objects when an obstacle such as a person or object is encountered in the direction of movement of the device or around the device. The purpose is to Therefore, in order to achieve the above object, the present invention stretches a rope such as a wire cable supported by a spring etc. around a moving device, and when an obstacle such as a person or object touches this rope, When the rope moves, by installing a limit switch that is linked to the movement of the rope, the circuit of this limit switch immediately stops the moving device, preventing damage to the device, damage to people and property, and prevention of getting caught. It is characterized by

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. Figure 1 is a plan view of the device of the present invention, Figures 2A and 2B are a plan view and side view showing details of the rope holding device, and Figures 3 and 4 are plane views of the detection mechanism when an obstacle touches the rope. The figure, side view, and FIG. 5 are circuit diagrams showing an example of an electric circuit.

As shown in FIG. 1, a rope 12 is held around the moving device 1 by a holding device as shown in FIG. As shown in FIG. 2, in the holding device, a holding rod 7 having bosses 3 and 8 at both ends is rotatably attached to a boss 2 attached to the device 1 by a pin 4, and a pin 9 is attached to the tip of the holding rod 7. pulley 1
0 is installed. Further, the holding rod 7 is supported by the device 1 by spring mounting seats 5, 6 and a spring 11 such that it is always in the position shown.
The rope 12 is fixed to the device 1 by a rope holder 25, which prevents the rope 12 from slipping or moving over a wide range. A spring 24 is attached to the middle of the rope 12, and serves as a tension applying mechanism to prevent the rope 12 from slacking and as a buffer mechanism when the rope 12 collides with an obstacle.

In FIGS. 3 and 4, a lever 16 is rotatably mounted on a mounting seat 13 attached to the device 1 with a bolt 23 via a pin 15 and a slide surface 14, and a limit switch 21 is mounted on the mounting seat 13. , a rope attachment seat 18 for fixing the rope 12 with a bolt 19 and a nut 20 is provided at one end of the lever 16, and a limit switch 2 is provided at the other end.
A dog 17 that contacts one detector 22 is provided.

FIG. 5 shows an example of an electric circuit, in which 21 is the above-mentioned limit switch, 26 is a switch having a self-holding circuit, 27 is a relay, and 28 is a drive motor. The drive motor 28, which is driven by the closing of the switch 26, immediately stops when the limit switch 21 is opened by the movement of the rope 12.

The present invention is configured as described above, and when an obstacle such as a person or an object touches the rope 12 held around the device 1, the holding rod 7 rotates around the pin 4 and the rope 12 follows. and will not cause damage to people or property. At the same time, the lever 16 is rotated by the movement of the rope 12, and the limit switch 21 is actuated via the dog 17, and the drive motor 28 is immediately stopped through the limit switch 21. Therefore, the device 1 will not stop and the accident will not be further aggravated. Obstacles such as people and objects are attached to the rope 12.
If the rope 12 is moved further away, the spring 24 and the rope holding device will return the rope 12 to its normal position, so if the switch 26 is closed, the drive motor 28 of the device 1 will be restarted.

According to the present invention, no damage is caused to mechanical equipment or obstacles (people, objects, etc.),
It also has the effect of operating as a simple and reliable mechanism.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the device of the present invention, Fig. 2 is an explanatory diagram showing details of the rope holding device, Figs. 3 and 4 are a plan view and side view of the detection mechanism when an obstacle touches the rope, and Fig. FIG. 5 is a circuit diagram showing an example of an electric circuit. 1... Device, 7... Holding rod, 10... Pulley, 1
1...Spring, 12...Rope, 13...Mounting seat, 16...Lever, 18...Rope mounting seat, 2
1...Limit switch, 24...Spring,
25...Rope holder.

Claims (1)

[Claims] 1. A rope with a spring inserted in a portion is stretched around the device, a portion of the rope is fixed to the device, and a lever is attached to the rope to operate a limit switch inserted into the circuit of the drive motor. Safety equipment for large moving equipment.