JPH0535277Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention is designed to prevent personal injury or damage to machinery or equipment due to unnecessary approach of robots, machinery, equipment, or equipment that operates with high voltage. This law relates to improvements to partition walls, fences, etc. that are installed around machinery, equipment, etc. when there is a risk of malfunction or damage to the equipment.

(Prior art) Conventionally, partition devices such as walls and fences have been installed outside machines, devices, etc. (hereinafter referred to as objects) that should prohibit unnecessary people from approaching, such as robots. The device is provided with a door equipped with a locking device to permit access by workers performing maintenance, inspection, etc. as necessary. Of course, the key to the locking device that opens and closes the door must be strictly controlled, but at the same time, for example, if a worker unlocks the locking device, opens the door, and enters a dangerous area limited by a partition device, When the key stored in the designated storage position is removed in order to gain access, the power supply to the robot or other target object is automatically cut off, causing the robot or other object to suddenly start moving during inspection or maintenance work. It is desirable to take safety measures such as configuring the system to prevent this from happening. However, in the unlikely event that a careless worker leaves the key near the partition device after opening the door and inspects or maintains the object,
If an unrelated person passing by notices the left key and mistakenly returns it to a predetermined storage position, power may be supplied to an object such as a robot and an unexpected accident may occur.

(Problem to be solved by the invention) When the door of the partition device mentioned above is opened and the restricted area is opened, not only unnecessary third parties but also people engaged in maintenance and inspection of the target object can enter the restricted area. In order to further improve the safety of the partition device, it is possible to further improve the safety of the partition device by configuring it so that even the worker who is present is prohibited from storing the key in the designated storage device, and therefore power is not supplied to the object. This is a technical problem to be solved by this invention.

(Means for Solving the Problems) The present invention was devised in view of the above, and is intended to be applied to partitions such as walls and fences installed outside of objects such as robots that should be prohibited from accessing unnecessary people. A device, a door that is provided in a part of the partition device and allows a person to approach the object by opening the door, a locking device that locks the door in a normally closed state, and a locking device that unlocks the locking device. a power cutoff device configured to cut off power supply to the object when the key is removed from a predetermined storage position for unlocking; When the lock device is unlocked and the door is opened, the key is automatically displaced to prevent the key from being stored in the predetermined position, and when the door is closed, the key is automatically displaced. a key storage control device that allows the key to be stored in the storage position, and a key storage control device that prevents the door from rotating and the key from being stored when the door is rotated in the closing direction after the door is opened; The gist of the present invention is a safety partition device characterized by comprising a temporary locking mechanism that temporarily blocks the opening at a predetermined intermediate opening degree.

(Example) Examples of the present invention will be specifically described below with reference to the accompanying drawings. The reference numeral 10 in the figure generally indicates a partition device installed outside an object such as a robot (not shown) to which unnecessary persons should be prohibited from approaching, and in the illustrated embodiment, it is shown as a partition fence made of steel pipes. There is. A door 14 that can be freely opened and closed via a hinge 12 is provided in a part of the partition fence 10, and the door 14 is closed by a locking device 16 of an arbitrary structure. It is unlocked and locked by the key 18. The key 18 is fixed to the plunger 20,
The plunger 20 is normally inserted and stored in the casing 22. The casing 22 houses a switch device (not shown) that controls power supply to objects such as robots, and the plunger 2
0 is inserted and stored in the casing 22, the switch device is closed and power is supplied to the object, and by pulling out the plunger 20 to use the key 18, the switch device is closed. The power supply to the object is cut off,
The object is now automatically paused.
In addition, the code|symbol 24 in the figure is a power supply line arrange|positioned between the casing 22 and the power supply which is not shown in figure.

Next, the vertical pipe 14' at the free end of the door 14
and the partition fence 1 adjacent to the vertical pipe 14' of the door 14.
A key storage control device 26, which is shown in detail in FIG.
The key storage control device 26 is attached to the vertical pipe 1 of the partition fence by an appropriate fixing means such as bolts, screws, or welding.
0', and a hinge plate 30 fixed to the bracket 28 by bolts, screws, welding, or other appropriate fixing means. The hinge plate 30 is provided with a first hinge tube 30a and a second hinge tube 30b, and the first hinge tube 30a has a generally band-like shape and is slightly bent in a dogleg shape at the center. The central portion of the lever 32 is pivotally supported, and the second hinge tube 30
One end of a generally dogleg-shaped stopper arm 34 is pivotally attached to b. A first spring 40 is tensioned between a spring mounting pin 36 projecting from the lever 32 and a spring mounting pin 38 projecting from the bracket 28.
2, a rotational force is constantly applied in the clockwise direction in FIG. Insertion hole 20'
(See Figure 2).
Further, a second spring 46 is tensioned between another spring mounting pin 42 projecting from the lever 32 and a spring mounting pin 44 projecting from the stopper arm 34, and the spring force is applied to the second spring 46. Therefore, the stopper arm 34 is constantly subjected to a rotational force in the clockwise direction in FIG. 3 around its pivot axis, and when no external force is acting on it (the state shown by the solid line in FIG. Due to the biasing force of the second spring 46, the bracket 28
It is in contact with a catch seat 48 fixed on the top.
Furthermore, on the extension arm 32b of the lever 32 on the side of the door 14, a longitudinally extending groove 32c (shown particularly clearly in FIG. 2) is provided, while the corresponding vertical tube 14 of the door 14 'A plate-shaped dog 5 that can enter into the groove 32c when the door is closed is provided on the top.
0, and a locking rod 52 that can engage with the tip of the stopper arm 34 is fixed at a position that does not interfere with the dog 50.

In the above-mentioned configuration, when an object such as a robot is in operation, the lever 32 is pushed around by the vertical tube 14' of the door 14, as shown by the dashed line in FIG.
Since the plunger 20 and the key 18 integral therewith can be freely removed as shown in FIG. 1, the door 14 is located in a direction nearly perpendicular to the casing 22.
is fixed to the vertical pipe 10' of the partition fence by the locking device 16 and closed. Next, when inspecting or servicing an object such as a robot, the key 18 is first removed from the casing 22 together with the plunger 20. Removing the plunger 20 opens the switch device in the casing 22, cutting off the power supply to the robot, etc., and immediately stops its operation. Then, the locking device 16 is unlocked with the key 18 and the door 14 is rotated about the hinge 12 to open a passage for the worker.
As the door 14 opens, the external force acting on the extension arm 32b of the lever 32 by the vertical tube 14' of the door disappears, so that the lever 32 automatically rotates to the position shown by the solid line in FIG. 3 by the tension of the first spring 40, and the extension arm 32a on the free end side becomes
As shown in Fig. 2, the plunger insertion hole 20' of the casing 22 is covered, so that even if the key 18 is carelessly left nearby, it cannot be inserted into the insertion hole 20' of the casing 22. Therefore, power is not supplied to the robot, etc., and the safety of the worker is ensured. In the unlikely event that a person other than those involved in the work happens to pass by and finds the key 18, and also notices that the door 14 is left open, and pushes the door 14 in the closing direction, the key 18 will be inserted into the vertical tube 14' of the door.
3, the dog 50 fixed to the lever 32 comes into contact with the stopper arm 34, which is pushed around against the second spring 46, and its free end engages with the locking rod 52 at the rotation position of the lever 32 shown by the two-dot chain line in Fig. 3, temporarily preventing any further rotation in the closing direction of the door 14. In this position, the extension arm 32a of the lever 32 still covers the plunger insertion hole 20' of the casing 22, so that the plunger 20 cannot be inserted and no power is supplied to the target object such as a robot, thereby ensuring safety. The structure of the temporary locking mechanism formed by the engagement of the stopper arm 34 and the locking rod 52 cannot be easily seen by anyone other than the workers who are specialized in inspecting and maintaining the object, so in many cases the plunger 20, i.e. the key 18, is not stored in the specified storage position, and even if the presence of the temporary locking mechanism consisting of the stopper arm 34 and the locking rod 52 is recognized after a certain time, the presence of such a device itself will make a person with normal judgment realize that the area is off-limits. On the other hand, since the workers concerned are well aware of the presence of the temporary locking mechanism, when closing the door 14 after completing the specified work, they can completely close the door 14 by using a screwdriver or the like to release the engagement between the stopper arm 34 and the locking rod 52, and in this state the plunger insertion hole 20' of the casing 22 is opened as already described,
After the lock device 16 is locked, the plunger 20 is fitted into the insertion hole 20', that is, the key 18 is stored in the specified storage position, and power supply to the object such as a robot is started.

(Effects of the invention) As is clear from the explanation of the above embodiments, according to the invention, specific Even if the locking device on the door of the partition device, which prevents access by people other than those involved, is unlocked due to work needs, even if the key is careless, it will not be possible to access the object. This is extremely beneficial in terms of safety because it can effectively prevent injuries to workers caused by unexpected power supply.

[Brief explanation of the drawing]

FIG. 1 is a front view of the safety partition device according to the present invention in a closed state, FIG. 2 is a front view of the partition device of FIG. 1 in an open state, and FIG. 3 is the key storage control device in FIG. 1. 26 is an enlarged plan view of FIG. 10... Partition fence, 14... Door, 16... Lock device, 18... Key, 20... Plunger, 22...
... Casing, 24 ... Power supply line, 26 ... Key storage control device, 30 ... Bracket, 32 ... Lever, 34 ... Stopper arm, 50 ... Dog, 5
2...Latching rod.

Claims (1)

[Scope of utility model registration request] A partition device such as a wall or fence installed on the outside of an object such as a robot that should prevent unnecessary people from approaching, or a partition device installed in a part of the partition device, and by opening it, people can access the object. A door that allows access to the door, a locking device that locks the door in a normally closed state, a key that unlocks the locking device, and a key that is removed from a predetermined storage position for unlocking. Therefore, the power cutoff device is configured to cut off the power supply to the object, and is automatically displaced when the key is removed from the storage position, the locking device is unlocked, and the door is opened. a key storage control device that prevents the key from being stored in the predetermined position and is automatically displaced when the door is closed to allow the key to be stored in the storage position, and after the door is opened; When the door is rotated in the closing direction, the door is provided with a temporary locking mechanism that temporarily prevents the door from rotating at a predetermined intermediate opening degree that still prevents the key from being stored. Features a safety partition device.