JP3909121B2 - Key lock device for maintenance and inspection - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a maintenance / inspection key lock device used when performing maintenance inspection of equipment such as an escalator.
[0002]
[Prior art]
As shown in JP-A-3-232688 as a passenger conveyor operating device, a conventional maintenance / inspection key lock device is a keyhole for a base that is a support and a stop switch provided on an operation panel of the passenger conveyor. And a stop key that can be engaged with the key hole of the start switch provided on the operation panel, and is engaged with the key hole of the stop switch to maintain the stop state. A cover surrounding the supported stop key and the activation key engaged with the key hole of the activation switch is provided on the base so as to be openable and closable, and a locking device for locking the cover to the base is provided. This locking device has a cylinder key mechanism. By engaging the third key with the key hole of the locking device from the outside of the cover and operating the third key, the base and the cover are locked or unlocked. After inserting the stop key into the key hole of the stop switch, the base is rotated 45 degrees clockwise to stop the stop switch and prevent the stop switch from returning to the original state. In order to prevent this, an activation key is inserted into the key hole of the activation switch to prevent rotation.
[0003]
[Problems to be solved by the invention]
However, the conventional maintenance and inspection key lock device requires three types of keys: a stop key to be inserted into the stop switch, a start key to be inserted into the start switch, and a third key to be inserted into the locking device. Suppose that the stop key and start key are covered with a cover so that the stop key and start key are not operated by a person other than the maintenance inspector during work, and the cover is locked with a third key so that the cover does not open. However, if a maintenance inspector who is working inadvertently leaves the third key in the locking device, another maintenance inspector may accidentally release the locking device and operate the stop key and start key. There is. Further, when a maintenance inspector other than the maintenance inspector who is working has the same key as the third key, there is a possibility that the lock device is unlocked by the key and the stop key and the activation key are operated. Furthermore, with the conventional maintenance / inspection key lock device, if the maintenance / inspector forgets the third key at the office or the like, the locking device cannot be unlocked or locked, so that the device cannot be inspected. End up. Further, since the locking device is a cylinder key mechanism, the locking device is bulky, and the base and the cover are large.
[0004]
Therefore, in order to solve these problems, a base, a cover that can be opened and closed on the base, a locking device that locks the cover to the base, and a keyhole of a stop switch provided on the operation panel of the device. A stop key that can be engaged, a start key that can be engaged with a key hole of a start switch provided on the operation panel, a first holding device that rotatably holds the stop key as a base, and a start key and a stop switch. And a second holding device that holds the base in a state that is movable in the same direction as the direction in which the heads are arranged, and a cover, a stop key head held by the base, and a start key head held by the base, A ring key mechanism that surrounds the first holding device and the locking device, the locking device being disposed between the first holding device and the second holding device and capable of freely setting the unlocking code number In addition, the first holding device is stopped. Has been developed to have a structure in which the end of the stop key is locked to the inner wall of the cover when the cover is locked to the base by the locking device. .
[0005]
However, this maintenance / inspection key lock device can be used when the operation panel provided with the stop switch and the start switch is flat, but the operation panel provided with the stop switch and the start switch has a curved surface. If the stop key is inserted into the key hole of the stop switch, the start key may not be inserted into the key hole of the start switch.
[0006]
An object of the present invention is to provide a maintenance / inspection key lock device that can be used even when the operation panel is curved.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a first key supported on a base so as to be engaged with a key hole of a stop switch provided on an operation panel of a passenger conveyor and hold the stop state, and the operation panel. A second key that engages with a key hole of the provided activation switch and holds the state of the first key via the base, and a cover that can be opened and closed on the base so as to surround both the keys; In a maintenance / inspection key lock device provided with a locking device for locking the cover to the base, the second key is moved to the base via a slider plate that is movable in the direction in which the start switch and the stop switch are arranged. A second holding device is provided, and the slider plate is provided with a groove for inserting the second key , and a notch portion that is connected to the groove and allows the second key to tilt in the movable direction. Having And features.
[0008]
As described above, the maintenance / inspection key lock device of the present invention is provided with a movable slider plate corresponding to the activation switch for inserting the second key, and the direction in which the second key is brought into contact with and separated from the stop switch on the slider plate. Since the notch that allows tilting is provided, the second key can be tilted and inserted into the keyhole of the start switch even if the operating panel is provided on the curved surface. The same maintenance / inspection key lock device can be used even if it is in the shape, and convenience can be improved.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 3 is a perspective view showing a lower entrance portion of an escalator that employs a maintenance / inspection key lock device according to an embodiment of the present invention, and FIG. 4 is an enlarged view of an operation panel below the escalator.
An operation panel 3 is provided on the curved surface portion 2 a at the lower entrance of the escalator 2, and a stop switch 4 and a start switch 5 are provided on the operation panel 3. The stop switch 4 releases the drive source of the escalator 2 by moving the key hole 4a from the neutral position 4b to the stop position 4c. The key can be inserted and removed only at the neutral position 4b. It has a structure that does not come off. The stop switch 4 is configured to return to a neutral position 4b by a return spring when the keyhole 4a is in a free state. On the other hand, the start switch 5 moves the step and handrail of the escalator 2 upward when the keyhole 5a is moved from the neutral position 5b to the raised position 5c, and the keyhole 5a is moved from the neutral position 5b to the lowered position 5d. As a result, the step of the escalator 2 and the handrail are moved downward.
[0010]
FIG. 1 is an exploded perspective view of a key lock device for maintenance and inspection according to an embodiment of the present invention that is used by being attached to the operation panel 3 described above.
The key lock device 1 for maintenance and inspection includes a synthetic resin base 6, a synthetic resin cover 8 that is pivotally supported by a small screw 7, 7 a on one end 6 c of the base 6, and the cover 8. A locking device 9 that locks the base 6, a first key 10 that engages with a key hole 4 a of a stop switch 4 provided on the operation panel 3 of an apparatus such as the escalator 2, and a start switch 5 that is provided on the operation panel 3. A direction in which the second key 11 that engages with the keyhole 5a, the first holding device 12 that rotatably holds the first key 10 on the base 6, and the start switch 5 and the locking switch 4 are arranged in the second key 11. And a second holding device 13 that holds the base 6 in a movable state in the same direction.
[0011]
The locking device 9 includes a shaft body 14 slidably supported inside the elongated box-shaped cover 8, two number rings 15 and 16 rotatably provided on the shaft body 14, and a shaft body 14. A locking body 17 provided integrally, a button portion 18 for projecting from the side surface of the cover 8 to push the shaft body 14, and a biasing direction opposite to the direction in which the shaft body 14 is pushed by the button portion 18. The spring body 19 such as a coil spring and the locking body 17 are released when the shaft body 14 is moved in the pressing direction by pressing the button portion 18 with the cover 8 closed on the base 6. In addition, there is provided a locked body 20 that stops the pressing of the button portion 18 and locks to the locking body 17 when the shaft body 14 moves in the biasing direction of the spring body 19. The locked body 20 is a small screw screwed into the base 6, and the locking body 17 in a portion that contacts the locked body 20 has an arcuate claw portion 17 a.
[0012]
The first holding device 12 includes a gun-metal rotating body 21 provided with a cross groove 21 c, a synthetic resin-made holding frame 22 that holds the rotating body 21 on the base 6, and the rotating body 21 is temporarily attached to the holding frame 22. A temporary fixing mechanism 23 is provided. After the small diameter portion 21 a of the rotating body 21 is fitted into the rotating body mounting opening 6 a of the base 6, the holding frame 22 is fixed to the base 6 with two small screws 24 so as to cover the upper surface of the rotating body 21. As shown in FIG. 2, the first holding device 12 is fixed to the base 6. The temporary fixing mechanism 23 is engaged with one of four grooves 21b provided on the outer periphery of the rotating body 21 at substantially equal intervals, and urges the engaging balls 23a toward the groove 21b. After the small spring 23b is installed in the mounting hole of the holding frame 22, the small screw 23c is screwed and sealed so that the locking ball 23a and the small screw 23b are not removed from the mounting hole of the holding frame 22. Yes. In the temporary fixing mechanism 23, the rotating body 21 is temporarily fixed by a locking ball 23a at a position along a straight line that intersects approximately 45 degrees with respect to a sliding direction of a slider plate 25 described later. The holding frame 22 protrudes from the surface of the base 6, and the protruding portion is fitted to the inner peripheral wall of the cover 8 so that it also serves as an inlay.
[0013]
The second holding device 13 includes a slider plate 25 which is a sliding body made of gunmetal having a cross groove 25a, and a slider plate mounting frame 26 made of a synthetic resin which slidably holds the slider plate 25 on the base 6. Have. The slider plate mounting frame 26 protrudes from the surface of the base 6 and also functions as an inlay by fitting the protruding portion to the inner peripheral wall of the cover 8 and is fixed to the base 6 by four machine screws 27. After the paragraph 25d of the slider plate 25 is fitted into the elongated opening 6b formed in the base 6, the slider plate mounting frame 26 is fixed to the base 6 from above the slider plate 25 and the elongated opening 6b, as shown in FIG. Thus, the second holding device 13 can be attached to the base 6, and a moving groove in which the slider plate 25 can move smoothly is formed between the base 6 and the slider plate attachment frame 26.
[0014]
As shown in the perspective view of FIG. 5, the slider plate 25 has notches 25b and 25c. The notches 25b and 25c allow the second key 11 to slide in the slider plate 25 as shown in FIG. The inclination angle θ of the second key 11 is set to be about 5 degrees as a minimum. Further, one of the grooves of the cross groove 25a of the slider plate 25 is formed so as to be parallel to the direction in which the slider plate 25 slides on the base 6. As shown in FIG. The parts 25b and 25c are provided continuously.
[0015]
The first key 10 and the second key 11 are made of metal and have the same shape. On the inner bottom of the cover 8 corresponding to the head of the first key 10 inserted into the rotating body 21, the cover 8 is closed, that is, the inner peripheral wall of the cover 8 is an inlay of the holding frame 22 and the slider plate mounting frame 26. A cross-shaped concave portion 8 a is formed in which the upper end portion of the first key 10 fitted in the cross groove 21 c of the rotating body 21 is fitted when the portion is fitted.
[0016]
On the outer peripheral surfaces of the number rings 15 and 16 of the locking device 9, numbers 15a and 16a of 0 to 9 are given at equal intervals, respectively, as shown in FIG. The fixing rings 28 and 29 are respectively fitted. Stopper grooves 28a and 29a are formed on the inner periphery of the fixing rings 28 and 29, respectively, and a stopper piece 14a fitted to the stopper grooves 28a and 29a is formed on the outer periphery of the shaft body 14 inserted in the center thereof. A plurality are provided in a row. Further, ten convex portions 28b and 29b are formed at equal intervals on the outer periphery of the fixing rings 28 and 29, respectively, and ten concave portions 15b and 16b provided at equal intervals on the inner periphery of the number rings 15 and 16 are provided. And are designed to fit each other.
[0017]
The locking device 9 is assembled by inserting the shaft body 14 into the locking device mounting hole 8b provided on the side surface of the cover 8 and aligning the stopper grooves 28a and 29a with the stopper pieces 14a of the inserted shaft body 14 in advance. The fixing rings 28 and 29 with the number rings 15 and 16 attached to the outer circumference are inserted, respectively. After that, the locking body 17 and the spring body 19 are inserted into the small diameter portion 14b of the shaft body 14, and the small diameter portion 14b is small. It fixes to the side surface of the cover 8 with the screw 30, and the assembly operation by the side of the cover 8 of the locking device 9 is completed as shown in FIG. With the shaft body 14 fixed to the cover 8 and the cover 8 being closed to the base 6 as described above, the outer periphery of the number rings 15 and 16 is opened from the opening 8d provided on the upper surface 8c of the cover 8 shown in FIG. When the number of the ring 15 and 16 projecting from the opening 8d is rotated by the fingertip and set to the password, the stopper grooves 28a and 29a and the stopper piece 14a Since the positions coincide with each other, when the button portion 18 is pushed, the shaft body 14 is moved against the urging force of the spring body 19 and the locking body 17 is separated from the locked body 20, so that the cover 8 is removed from the base 6. Will be able to open. When the pressing of the button portion 18 is stopped, the shaft body 14 is returned to the original state by the spring body 19, the locking body 17 is again engaged with the locked body 20, and the cover 8 can be opened from the base 6. Disappear.
[0018]
In addition, recesses 15c and 16c are formed on the outer periphery of the number rings 15 and 16 between the numbers 15a and 16a of 0 to 9, respectively, and are made of phosphor bronze plates that fit into the recesses 15c and 16c. A friction spring body 31 is fixed to the inner bottom of the cover 8 with two machine screws 32. Further, a thick portion 8e is formed in a portion where the small screw 30 for fixing the small-diameter portion 14b of the shaft body 14 to the cover 8 is attached in the inner portion of the cover 8. Further, in the cover 8, at a position facing the slider plate 25 and the slider plate mounting frame 26, a first key 10 and a second key are provided in a portion between the number rings 15 and 16 and the end portion 6 c of the cover 8. A storage space 8 f for storing 11 is also formed.
[0019]
Such a maintenance / inspection key lock device 1 has a locking device 9 disposed between the first holding device 12 and the second holding device 13 and a ring key mechanism in which an unlocking code number can be freely set. Moreover, as a result of providing the first holding device 12 with the temporary fixing mechanism 23 for temporarily fixing the first key 10 at the stop position of the stop switch 4, the overall dimensions may be 8 mm in length, 20 mm in width, and 15 mm in width. The size is about 1/9 of that of the conventional device, which can be significantly reduced in size, and the weight is 50 g, which is 1/5 of the conventional weight. Therefore, the maintenance / inspection key lock device 1 can be easily carried by the maintenance / inspector in the pocket of the jacket, and can be easily attached to the operation panel 3 to improve convenience. Can do.
[0020]
When using this maintenance / inspection key lock device 1, after the first key 10 fitted in the cross groove 21 c of the rotating body 21 is inserted into the key hole 4 a of the stop switch 4 provided on the curved surface portion 2 a of the escalator. The first key 10 is rotated to the stop position 4c of the stop switch 4. Next, the slider plate 25 is moved along the slider plate mounting frame 26 so as to be positioned on the key hole 5 a of the activation switch 5. In this state, the second key 11 is inserted into the cross groove 25a of the slider plate 25 so as to correspond to the key hole 5a. At this time, unlike the case where the operation panel 3 is provided on the lower entrance curved surface portion 2a as in the escalator shown in FIG. Therefore, the second key 11 is inserted at an angle as shown in FIG. 6 at the notches 25b and 25c while finely adjusting the position of the slider plate 25. Then, as shown in FIG. 7, the 2nd key 11 can be easily inserted in the keyhole 5a of the starting switch 5 provided in the curved surface part 2a of the escalator. A force is applied to the first key 10 inserted into the key hole 4a of the stop switch 4 and rotated to the stop position 4c so as to be returned to the neutral position 4b by the return spring. This rotation is inserted into the key hole 5a of the start switch 5. The second key 11 is blocked. In addition, since the temporary holding mechanism 23 is configured in the first holding device 12 into which the first key 10 is inserted, only the first key 10 needs to be rotated from the neutral position 4b to the stop position 4c. As in the case where the temporary fixing mechanism 23 is not provided, after the first key 10 is inserted, it is necessary to rotate the entire base 6 and the cover 8 to rotate the first key 10 from the neutral position 4b to the stop position 4c. In addition, the maintenance / inspection key lock device 1 can be mounted on the operation panel 3 without being affected by the surrounding structure of the operation panel 3.
[0021]
However, in this state, a person other than the maintenance inspector who maintains and inspects the device can remove the second key 11, so that the cover 8 is pressed against the base 6 and the locking body 17 is moved to the locked body 20. When locked, the cover 8 is locked to the base 6. Thus, the first key 10 inserted into the key hole 4a of the stop switch 4 and the second key 11 inserted into the key hole 5a of the start switch 5 can be covered with the cover 8, and since the locking device 9 is provided, the button Even if the portion 18 is pushed, the locking body 17 is not removed from the locked body 20 and the cover 8 is not opened. Therefore, a person other than the maintenance inspector who maintains and inspects the device operates the stop switch 4 and the start switch 5. Can be surely stopped. In addition, since the ring key mechanism is adopted as the locking device 9, the number of keys held by the maintenance inspector can be reduced, and the unlocking code number can be arbitrarily set by rotating the number rings 15 and 16, so that the equipment can be maintained and inspected. It is possible to reliably prevent a person other than the maintenance inspector from operating the stop switch 4 and the start switch 5.
[0022]
In order to remove the maintenance / inspection key lock device 1 from the operation panel 3 after the maintenance / inspection work, the maintenance / inspector rotates the number rings 15 and 16 to match the unlock code number, and stops the stoppers in the stopper grooves 28a and 29a. Assuming that the piece 14a can be fitted, the shaft body 14 is moved when the button portion 18 is pressed, and the locking body 17 is detached from the locked body 20, so that the cover 8 can be opened. If the cover 8 is opened, the first key 10 can be removed from the stop switch 4 by rotating the first key 10 and returning it to the neutral position 4a of the stop switch 4. It can be removed from the operation panel 3.
[0023]
When the maintenance / inspection key lock device 1 is used for the operation panel 3 provided on a flat surface, the first key 10 is inserted into the key hole of the stop switch 4 and the second key 11 is inserted into the key hole of the start switch 5. If the cover 8 is locked to the base 6 without being tilted, it can be used in the same procedure as when the maintenance / inspection key lock device 1 is used for the operation panel 3 provided on the curved surface portion 2a. At this time, even if the directions of the keyhole 4a of the stop switch 4 and the keyhole 5a of the start switch 5 are different, the cross-shaped grooves 21c and 25a are formed in the rotating body 21 and the slider plate 25, respectively. The insertion direction of the second key 11 can be easily changed. Further, since the slider plate 25 is provided, even when the distance between the key hole 4a of the stop switch 4 and the key hole 5a of the start switch 5 is different, the slider plate 25 can be moved to easily cope with it. In this way, the same maintenance / inspection key lock device 1 can be used regardless of whether the operation panel 3 is flat or curved.
[0024]
In the above-described embodiment, in order to be applicable to various types of operation panels 3, cross-shaped grooves 21c and 25a are formed in the rotating body 21 and the slider plate 25, or the first key 10 is The first holding device 12 to be inserted is provided with the temporary fixing mechanism 23. However, if it is used properly for each target, a unidirectional groove is formed in the rotating body 21 and the slider plate 25, or the temporary fixing mechanism 23 is provided. It is good also as the 1st holding | maintenance apparatus 12 which abbreviate | omitted and stopped rotation .
[0025]
【The invention's effect】
As described above, the maintenance / inspection key lock device according to the present invention is provided with a slider plate that can move in the direction of contact with and away from the stop switch corresponding to the start switch into which the second key is inserted. A notch is provided that allows the key to be tilted toward and away from the stop switch, so that the second key can be tilted and inserted into the key hole of the start switch even when the operation panel is provided on the curved surface. The same key lock device for maintenance and inspection can be used regardless of whether the surface is curved or curved, and convenience can be enhanced.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a maintenance / inspection key lock device according to an embodiment of the present invention.
2 is a perspective view showing an assembled state of the maintenance / inspection key lock device shown in FIG. 1; FIG.
FIG. 3 is a perspective view showing a lower inlet portion of the escalator.
4 is an enlarged front view showing an operation panel below the escalator shown in FIG. 3. FIG.
5 is a perspective view showing a slider plate of the maintenance / inspection key lock device shown in FIG. 1; FIG.
6 is a cross-sectional view showing a state where a second key is attached to the slider plate shown in FIG.
7 is a side view showing a use state of the maintenance / inspection key lock device shown in FIG. 1; FIG.
[Explanation of symbols]
4 Stop switch 4a, 5a Key hole 5 Start switch 6 Base 8 Cover 9 Locking device 10 First key 11 Second key 12 First holding device 13 Second holding device 21c Cross groove 25 Slider plate 25a Cross groove 25b, 25c Notch

Claims (3)

Engage with the key key of the start switch provided on the operation panel and the first key supported on the base so as to engage the key hole of the stop switch provided on the operation panel of the passenger conveyor and hold the stop state. A second key that holds the state of the first key through the base, a cover that can be opened and closed on the base so as to surround both keys, and a locking device that locks the cover to the base. In the maintenance / inspection key lock device provided, a second holding device is provided for holding the second key to the base via a slider plate provided so as to be movable in a direction in which the start switch and the stop switch are arranged. The slider plate has a groove for inserting the second key, and a maintenance / inspection key which is provided continuously with the groove and has a notch which allows the second key to tilt in the movable direction. Lock .   2. The apparatus according to claim 1, wherein a first holding device that rotatably holds the first key is provided on the base, and the first holding device temporarily holds the rotation positions of the first key and the stop switch. A key lock device for maintenance and inspection, comprising a stop mechanism.   2. The locking device according to claim 1, wherein the locking device includes a shaft body fitted to the fixing ring so as to be allowed to move in the axial direction at a predetermined position, and a number engaged with the fixing ring so that the position thereof can be adjusted. A ring and a locking body that unlocks the base and the cover by moving the shaft when the number ring is a PIN code and when the predetermined position is reached, Key lock device for maintenance inspection.

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