JP5207466B2 - Safety fence - Google Patents

Description

  The present invention relates to a safety fence capable of locking an open / close door that opens and closes an entrance / exit with an interlock device.

  There is known a safety fence provided around a device so that no one can get close to the device in operation. Such a safety fence is provided with an entrance so that a person can enter around the device during maintenance, etc., and an entrance door that can be locked by an interlock device is provided at the entrance. Yes. As such an interlock device, for example, the door can be locked and unlocked with a removable carry key, and the lock key cannot be removed when the door is locked, and the device within the safety fence An interlock device is known in which the key can be removed and the device in the safety fence cannot be activated when the door is unlocked and the door is unlocked (see Patent Document 1). ). There is also known a safety device capable of controlling the locking of the door with a removable cap-like plug (see, for example, Patent Document 2). In addition, there is Patent Document 3 as a prior art document related to the present invention.

Japanese Patent No. 3668850 Japanese Patent No. 3326542 JP 11-264269 A

  When a person enters the safety fence so that it can be determined whether or not a person is in the safety fence depending on whether the carry-in key is in the apparatus main body or not. There is a case where a rule is set so that a person enters the safety fence after removing the carry-in key of the lock device. In the device of Patent Document 1, after unlocking the door with the carry-in key, the door can be opened and closed with the carry key being inserted into the lock device main body. Therefore, a person may enter the safety fence with the carry key attached to the lock device body.

  Then, an object of this invention is to provide the safety fence which can prevent reliably that a person enters into a safety fence, with the cap which unlocks a locking device being attached.

  The safety fence of the present invention is provided with a removable cap (10) in the release operation portion (12), and the door (3) is opened by a lock device (8A, 8B) that can be unlocked by operating the cap. In the safety fence that can lock the open / close doors (4A, 4B), either the frame (5) of the open / close door or the door portion (6) supported to be openable / closable by the frame includes the open / close door. In the closed state, a hook (11A, 11B) is provided that is disposed around the cap and is hooked to the cap when the door portion is opened while the cap is attached to the release operation portion.

  According to this safety fence, when the door portion is opened with the cap attached, the hook is caught by the cap, so that the person who opened the door portion can be surely noticed that the cap has not been removed. For this reason, it is possible to reliably prevent a person from entering the safety fence while the cap is attached to the release operation unit. In addition, since a person is prevented from entering the safety fence with the cap attached in this way, it can be determined whether or not there is a person in the safety fence based on whether or not the cap is attached.

  In one aspect of the safety fence, the cap may be attached to the release operation unit so as to drop when the hook is caught. In this case, it is possible to reliably prevent the cap from coming off.

  As the opening / closing door provided in the safety fence of the present invention, for example, the opening / closing door may be a hinged door in which the door portion is supported on the frame by a hinge (7), and the opening / closing door may be the door. The part may be a sliding door that is slidably supported by the frame.

  In addition, in the above description, in order to make an understanding of this invention easy, the reference sign of the accompanying drawing was attached in parenthesis, but this invention is not limited to the form of illustration by it.

  As described above, according to the present invention, when the door is opened with the cap attached, the hook is caught by the cap, so that the person who opened the door is surely noticed that the cap has not been removed. be able to. For this reason, it is possible to reliably prevent a person from entering the safety fence while the cap for unlocking the locking device is attached.

(First form)
FIG. 1 shows a mechanical device 2 around which a safety fence 1A according to a first embodiment of the present invention is provided. 1 A of safety fences are provided in order to prohibit a person from entering the circumference | surroundings of the machine apparatus 2 which is operating. The safety fence 1A is provided with an entrance 3 through which a person enters and exits, and the entrance 3 is provided with an openable / closable door 4A. The open / close door 4 </ b> A is configured as a hinged door in which a door 6 is supported on a frame 5 by a hinge 7 so as to be openable and closable forward and backward. A lock device 8A for locking the open / close door 4A in a closed state is attached to the entrance 3.

  2 and 3 are enlarged perspective views of the locking device 8A. As shown in FIG. 2, the lock device 8A includes a device main body 9, a cap 10, and a hook 11A. 2 shows a state in which the cap 10 is attached to the apparatus main body 9, and FIG. 3 shows a state in which the cap 10 is removed from the apparatus main body 9. The apparatus main body 9 is attached to the side opposite to the side where the hinge 7 of the frame 5 is attached, that is, the side where the frame 5 is opened and closed. As shown in FIG. 3, the apparatus main body 9 is provided with a release operation section 12 for operating switching between a locked state in which the door 4A is locked and an unlocked state in which the door 4A is unlocked and unlocked. ing. The lock device 8A is configured so that the mechanical device 2 in the safety fence 1A cannot be activated in the unlocked state and can be activated in the locked state. That is, when the locking device 8A is unlocked and a person can enter and exit the safety fence 1A from the entrance 3, the mechanical device 2 cannot be operated, and the locking device 8A is locked and a person can enter and exit the safety fence 1A. In a state where it cannot be performed, the mechanical device 2 can be operated. A convex portion 13 is provided on the upper portion of the release operation portion 12.

  The cap 10 can be attached to and detached from the release operation unit 12 and functions as a key for operating the release operation unit 12. When the cap 10 is attached to the release operation unit 12 and is turned to the right, the lock device 8A is in a locked state, and when the cap 10 is turned to the left, the lock device 8A is in an unlocked state. The cap 10 is provided with a guide passage 14 that engages with the convex portion 13 of the release operation portion 12 and an engagement groove 15 that extends from the tip of the guide passage 14 at an upper portion when the cap 10 is attached to the release operation portion 12. It has been. The guide passage 14 extends in a direction in which the cap 10 is attached to and detached from the release operation portion 12 so that the convex portion 13 does not hinder attachment / detachment to the release operation portion 12. Further, the engagement groove 15 extends from the front end of the guide passage 14 in the direction of the rotation of the cap 10 in the direction in which the locking device 8A is locked, so as not to hinder the operation of locking the locking device 8A. . For this reason, when the convex portion 13 is positioned in the engaging groove 15, that is, when the locking device 8A is in the locked state, the convex portion 13 is caught by the engaging groove 15, and the movement of the cap 10 in the attaching / detaching direction is prevented. The As a result, when the lock device 8A is in the locked state, the cap 10 is prevented from moving in the attaching / detaching direction, so that the cap 10 cannot be removed from the release operation unit 12. On the other hand, when the locking device 8A is in the unlocked state, the convex portion 13 of the release operation portion 12 is located in the guide passage 14 and does not hinder the attachment / detachment, so that the cap 10 can be removed from the release operation portion 12. The cap 10 is provided with a knob 16 for facilitating the operation of the cap 10.

  The hook 11 </ b> A is provided on the door portion 6, and its position corresponds to the apparatus main body 9. The hook 11 </ b> A moves integrally with the door unit 6 as the door unit 6 opens and closes. FIG. 4 is a schematic cross-sectional view of the main part of the locking device 8A. As shown in FIG. 4, the hook 11A is provided with a hole 17A at a position coinciding with the position of the release operation part 12 when the door part 6 is closed, and the diameter D1 of the hole 17A is the release operation part. It is larger than the diameter Ds of 12. For this reason, when the door portion 6 is closed, the release operation portion 12 passes through the hole 17A, and the hook 11A is disposed around the release operation portion 12. The diameter D1 of the hole 17A of the hook 11A is formed smaller than the diameter Dc of the cap 10. For this reason, when the cap 10 is attached to the release operation unit 12, the hook 11 </ b> A is caught by the cap 10 and the door unit 6 cannot be closed. That is, the hook 11 </ b> A is configured to be interposed between the cap mounted on the release operation unit 12 and the apparatus body 9 when the door unit 6 is locked and to be disposed around the cap 10. ing.

  According to this embodiment, the hook 11A is always disposed around the cap 10 when the door portion 6 is locked. Further, since the diameter D1 of the hole 17A of the hook 11A is smaller than the diameter Dc of the cap 10, when the door portion 6 is opened with the cap 10 mounted on the release operation portion 12, the hook 11A also tries to move together with the door portion 6. , Caught on the cap 10. As a result, the person who tries to open the door portion 6 can be surely noticed that the cap 10 is not removed, so that the person can enter the safety fence 1 with the cap 10 attached. Can be prevented. For this reason, it is possible to prevent the mechanical device 2 from being activated due to forgetting to remove the cap 10 despite the presence of a person in the safety fence 1A.

  Further, when the lock device 8A is in a locked state and the cap 10 cannot be removed, that is, in a state where no person can enter or leave the safety fence 1A, the hook 11A is caught by the cap 10 and opens the door portion 6. Can not. On the other hand, in a state where the lock device 8A is unlocked and the cap 10 can be removed, that is, in a state where a person can enter and leave the safety fence 1A, the operation of further opening the door portion 6 while the cap 10 is caught is performed. Then, with the movement of the hook 11A, the cap 10 is removed from the release operation unit 12 and dropped. For this reason, the door part 6 is not opened while the cap 10 is attached to the release operation part 12. Therefore, it can be determined whether or not there is a person in the safety fence 1 </ b> A according to the wearing state of the cap 10.

  In the first embodiment of the present invention, the diameter D1 of the hole 17A provided in the hook 11A is smaller than the diameter Dc of the cap 10. However, the present invention is not limited to such a configuration. Even if the diameter of the hole provided in the hook 11 </ b> A is larger than the diameter of the cap 10, the hook 11 </ b> A may be configured to be hooked on the cap 10 attached to the release operation unit 12 when the door unit 6 is opened. For example, the hook 11 </ b> A may be hooked on the side surface of the cap 10 by the operation of opening the door portion 6, or the knob 16 provided on the cap 10 may be hooked.

(Second form)
Next, the safety fence which concerns on the 2nd form of this invention is demonstrated with reference to FIGS. Below, the same code | symbol is attached | subjected to FIGS. 5-7 for the same structure as a 1st form, and description is abbreviate | omitted. FIG. 5 shows a mechanical device 2 around which a safety fence 1B according to the second embodiment of the present invention is provided. As shown in FIG. 5, the opening / closing door 4 </ b> B provided at the entrance / exit 3 of the second configuration is configured as a sliding door in which the door portion 6 is supported by the frame 5 so as to be slidable in the directions of arrows O and C in FIG. 5. Has been.

  6 and 7 are enlarged views of the locking device 8B of the safety fence 1B according to the second embodiment of the present invention. 6 shows a state in which the cap 10 is removed, and FIG. 7 shows a state in which the cap 10 is attached. As shown in FIG. 6, the hook 11 </ b> B is attached so as to maintain a certain distance L <b> 1 from the release operation unit 12 in a state where the opening / closing door 4 </ b> B is closed so as not to disturb the opening / closing operation of the door unit 6. Yes. For this reason, the door 6 can be opened and closed in a state where the cap 10 is removed from the release operation unit 12. The hook 11B is formed in an L shape extending from the door 6 in a direction perpendicular to the opening / closing direction by a certain distance L1 and then extending in the opening / closing direction.

  The diameter D2 of the hole 17B of the hook 11B is formed to be slightly larger than the diameter Dc of the cap 10, and when the door 4B is closed as shown in FIG. It is configured to be mounted. A length L2 of the cap 10 in the direction of attaching to the release operation unit 12 is longer than a distance L1 between the apparatus main body 9 and the hook 11B. For this reason, as shown in FIG. 7, when the opening / closing door 4B is closed and the cap 10 is attached to the release operation portion 12, a part of the cap 10 protrudes from the hook 11B.

  According to this embodiment, in a state where the cap 10 is attached to the release operation unit 12 through the hole 17B with the open / close door 4B closed, a part of the cap 10 protrudes from the hook 11B. For this reason, if the door 6 is opened with the cap 10 attached to the release operation unit 12, the hook 11B is caught by the cap 10 and the door 6 cannot be opened. Thereby, since the removal of the cap 10 can be surely noticed, it is possible to reliably prevent a person from entering the safety fence 1 while the cap 10 is attached to the release operation unit 12.

  However, this invention is not limited to the above-mentioned form, It can implement with a various form within the range of the summary of this invention. In each of the above embodiments, the apparatus main body 9 is provided on the frame 5 of the doorway 3 and the hooks 11A and 11B are provided on the door portion 6. However, the present invention is not limited to such a configuration. For example, a structure in which a hook is provided on the frame and an apparatus main body is provided on the door may be employed.

The figure which shows the mechanical apparatus with which the safety fence which concerns on the 1st form of this invention was provided in the circumference | surroundings. The expansion perspective view in the state where the cap of the locking device concerning the 1st form of the present invention was attached. The expansion perspective view in the state where the cap of the locking device concerning the 1st form of the present invention was removed. The cross-sectional schematic diagram of the principal part of the locking device which concerns on the 1st form of this invention. The figure which shows the mechanical apparatus by which the safety fence which concerns on the 2nd form of this invention was provided in the circumference | surroundings. It is an enlarged view of the locking device concerning the 2nd form of the present invention, and is a figure showing the state where a cap was removed. It is an enlarged view of the locking device which concerns on the 2nd form of this invention, and is a figure which shows the state in which the cap was attached.

Explanation of symbols

1A, 1B Safety fence 3 Entrance 4A, 4B Open / close door 5 Frame 6 Door part 8A, 8B Locking device 10 Cap 11A, 11B Hook 12 Release operation part

Claims (4)

In the safety fence which can lock the open / close door which opens and closes the entrance / exit with the lock device which is provided with a detachable cap on the release operation part and can be unlocked by operating the cap,
Either the frame of the opening / closing door or the door portion supported by the frame so as to be openable / closable is disposed around the cap when the opening / closing door is closed, and the cap is attached to the release operation portion. A safety fence comprising a hook that is hooked to the cap when the door portion is opened.   The safety fence according to claim 1, wherein the cap is attached to the release operation unit so that the cap is dropped when the hook is caught.   The safety fence according to claim 1 or 2, wherein the open / close door is a hinged door in which the door portion is supported by a hinge on the frame.   The safety fence according to claim 1 or 2, wherein the opening / closing door is a sliding door in which the door portion is slidably supported by the frame.

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