JP2003185091A - Powered equipment safety device - Google Patents

Abstract

(57) [Problem] To provide a door which is automatically locked when closed at an opening of a power-driven device, thereby improving safety. SOLUTION: A door 3 is attached to an opening 2 of a power-driven device so as to be movable in an opening direction and a closing direction. The door is provided with a kanuki receiver 11. The door is always urged by the weight 8 in the opening direction. When the door is closed, the detection unit 12a detects the cannel receiver 11 and generates a detection signal. The cannuki device 13 operates according to the detection signal and the cannuki pin 13a
Is engaged with the canker holder. Thus, the movement of the door in the opening direction is automatically prevented according to the closing of the opening.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device provided in an opening of a motorized device.

[0002]

2. Description of the Related Art Powered assembling machines, processing machines, inspection devices, powered devices for manually supplying workpieces to the devices, powered devices that require a person to put a part of his body into the device, and the like. In, it is extremely dangerous to drive with parts of the body such as hands put in. In view of this point, the safety measures listed below have been proposed.

A switch that is pushed by both hands is used to start the powered device, and the operation of the device is stopped when the switch is released to prevent the hand from entering the device during operation.

A door is provided at the opening of the motorized device, and after closing the door, the start switch is operated to start the device.
If the door is opened during operation, the device will stop immediately.

[0005]

However, the safety measure (1) has a problem in that it is necessary to keep pressing the switch during the operation of the apparatus, so that no other work can be performed during that time.

Further, in the safety measure, there is a problem that if the door is opened by mistake during the operation of the apparatus, the apparatus is stopped, and it takes time to push the start switch and open the door.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a safety device for a motorized device, which is provided with a door which is automatically locked when it is closed at the opening of the motorized device, thereby improving safety. .

[0008]

According to the present invention, there is provided a door movably attached to the opening of the motorized device in an opening direction and a closing direction, an engaging portion provided on the door, and the door. A biasing member that constantly biases in the opening direction, a detection unit that detects the engagement portion when the door is closed and generates a detection signal, and the engagement that operates according to the detection signal. There is provided a safety device including a lock portion that engages with a portion and prevents movement of the door in the opening direction.

The biasing member may be constituted by a weight, and the door may be moved in the opening direction by the gravity of the weight.

Means may be provided for releasing the engagement between the lock portion and the engagement portion in response to the end of the operation of the powered device.

The door may be a sliding door or a pivoting door.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 (a) and 1 (b),
A safety device according to the first embodiment of the present invention will be described.

The safety device shown in FIG. 1 is a powered device for manually supplying a work into the device, such as a powered assembly machine, a processing machine, an inspection device, or a part of a body inside the device. It is provided in a powered device that needs to be put in and operated. This safety device includes a door 3 called a safety door that can open and close a vertical opening 2 provided in a fixed cover 1 of a motorized device. This door 3 is a sliding door.

The door 3 has a handle 4 on its front surface and a pair of slide guides 5 on its rear surface. On the other hand, the powered device is provided with a pair of slide rails 6 extending vertically.
The slide guide 5 is guided along the slide rail 6. Thus, the door 3 is attached so as to be movable in the opening direction (upward) and the closing direction (downward).

One end of a flexible wire 7 is connected to the door 3. A weight 8 is connected to the other end of the wire 7. An intermediate portion of the wire 7 is hung on a pulley 9 rotatably provided on the upper part of the power unit. In this way, the door 3 is lifted upward by the gravity of the weight 8 to open the opening 2. That is, the weight 8 functions as a biasing means that constantly biases the door 3 in the opening direction. It is of course possible to move the door 3 in the closing direction and close the opening 2 by grasping the handle 4 and pushing it down.

The door 3 is further provided with a hook receiver 11 which serves as an engaging portion on the lower portion of the rear surface. On the other hand, the motorized device is provided with a bottom dead center switch 12 and a ratchet device 13 at its lower part. The bottom dead center switch 12 has its detecting portion 12a.
Thus, it is detected that the door 3 has descended to the position where the opening 2 is completely closed, and a detection signal is generated. The detection signal is sent to a control device (not shown). This control device controls the operation of the device 13 according to the detection signal. That is,
The control device drives the latch device 13 by referring to the detection signal, causes the latch pin 13a to protrude, and receives the latch receiver 11
The door 3 in the opening direction. As a result, the movement of the door 3 in the opening direction is prevented. That is, the door 3 cannot be opened. The drive of the pin 13a on the device 13 is as follows.
Use pneumatic cylinders or hydraulic cylinders or solenoids. In addition, Kannuki device 13 or Kannuki pin 1
3a works as a lock part.

In this way, the door 3 is automatically locked when the opening 2 is closed, so that a person cannot put a part of his body into the device through the opening 2 after that. Therefore, even when using power to perform various work related to the work or the like placed on the pedestal 14 in the power-driven device, there is no danger of human beings being injured, and high safety is obtained.

After the operation of the device, the device 13 is operated in response to a command signal from the control device for controlling the operation of the device.
Operates to retract the cannuki pin 13a. As a result, the engagement between the hook pin 13a and the hook receiver 11 is released, so that the weight 8 moves by gravity to move the door 3 in the opening direction to open the opening 2. That is, the door 3 is automatically opened. Therefore, it becomes possible to perform a required operation on the work of the pedestal 14 by inserting a hand from the opening 2.

The operation of the powered device will be described with reference to FIGS. 2 (a) to 2 (e) as well.

FIG. 2A shows an initial state, in which the door 3 is opened. Therefore, as shown in FIG. 2B, the work 15 can be supplied to the pedestal 14 through the opening 2.

After that, the handle 4 is pushed down manually. When the door 3 descends and closes the opening 2 as shown in FIG. 2C, the latch receiver 11 operates the detector 12 a of the bottom dead center switch 12. Then, Kannuki device 13
Drives to pull out the hook pin 13a to engage the hook receiver 11 in the opening direction of the door 3.

In this state, the work 15 is processed by the automatic processing device 16 as shown in FIG. 2 (d). Work 1
In the processing of No. 5, the automatic processing device 16 is moved to the arrows 17 and 18
Since the opening 2 is closed by the door 3 even if it is arbitrarily moved as indicated by, there is no danger of harming the human body.
Therefore, the work can be safely executed.

After the work, the automatic processing device 16 retracts as shown by arrows 21 and 22 as shown in FIG. 2 (e). Thereafter, the latch device 13 operates to retract the latch pin 13a, and the engagement with the latch receiver 11 is released. As a result, the weight 8 descends by gravity and moves the door 3 in the opening direction to open the opening 2. Therefore, it becomes possible to easily and safely take out the work 15 after processing from the cradle 14.

A safety device according to a second embodiment of the present invention will be described with reference to FIG. Similar parts are designated by the same reference numerals, and description thereof will be omitted.

In the safety device of FIG. 3, the door 3 is provided so as to open and close the horizontal opening 2. That is, door 3
Is a sliding door that can slide horizontally. The weight 8 is a flexible wire 7 for urging the door 3 to one side in the horizontal direction.
It is connected to the door 3 via. When the door 3 is closed, the detection unit 12a of the bottom dead center switch 12 is activated, the pin 13a of the hook device 13 is engaged with the hook receiver 11, and the door 3 is automatically locked. It is similar to the safety device.

Although FIGS. 1 to 3 show a power-operated device having a sliding door, the same can be applied to a device having a rotating door as shown in FIG.

The safety device of FIG. 4 has a fulcrum 23 on the power-operated device.
It includes a lever 24 movably supported by the seesaw. The door 3 is connected to one end of the lever 24. The weight 8 is coupled to the other end of the lever 24. Due to the gravity of the weight 8, the door 3 is rotated upward about the fulcrum 23 as shown by the chain line, and the opening 2 is opened.

When the door 3 is pushed down as necessary, the door 3 rotates about the fulcrum 23 and closes the opening 2 as shown by the solid line. The point that this state is detected by a detection unit (not shown) and the door 3 is locked by a lock unit (not shown) is similar to the safety device shown in FIGS.

Although a rotary door having a special structure is shown in FIG. 4, a rotary door or door which is generally used can be similarly implemented.

Note that the door 3 may be provided with a hole capable of engaging with the hook pin 13a, instead of the hook receiver 11.

Alternatively, a magnetic member may be attached to the door 3 instead of the latch receiver 11, an electromagnet may be used instead of the pin 13a, and the magnetic member may be attracted and fixed by the magnetic force of the electromagnet.

Further, the door 3 itself may be sucked by negative pressure to be locked.

[0033]

As described above, the safety device of the power-equipped device is provided with the door that is automatically locked when it is closed at the opening of the power-equipped device. .

[Brief description of drawings]

FIG. 1 shows a powered device including a safety device according to a first embodiment of the present invention, in which (a) is a front view and (b) is a schematic side sectional view.

2 (a) to 2 (e) are explanatory views for explaining the operation of the powered device of FIG.

FIG. 3 is a schematic side sectional view showing a powered device including a safety device according to a second embodiment of the present invention.

FIG. 4 is a diagram for explaining a modified example of the safety device.

[Explanation of symbols] 1 Fixed cover 2 openings 3 units 4 handles 5 Slide guide 6 slide rails 7 wires 8 weights 9 pulley 11 Cannuki receiving 12 bottom dead center switch 12a detector 13 Kannuki device 13a Cannuquipin 14 cradle 15 work 16 Automatic processing equipment 23 fulcrum 24 lever

Claims (4)

[Claims] 1. A door mounted movably in an opening direction and a closing direction at an opening of a power unit, an engaging portion provided on the door, and a biasing force that constantly biases the door in the opening direction. Members,
A detection unit that detects the engagement portion and generates a detection signal when the door is closed; and a detection unit that operates in response to the detection signal to engage the engagement portion, in the opening direction of the door. A safety device comprising: a lock portion that prevents movement of the. 2. The safety device according to claim 1, wherein the biasing member includes a weight, and the door is moved in the opening direction by gravity of the weight. 3. The safety device according to claim 1, further comprising means for releasing the engagement between the lock portion and the engagement portion in response to the end of the operation of the powered device. 4. The safety device according to claim 1, wherein the door is one of a sliding door and a rotating door.