JPH02256786A - Switchgear - Google Patents

Abstract

PURPOSE:To secure the reliability by having a reflector fixed in the direction of blocking, a switching body, a phototube stopping and reversing a motor in a light receiving state, a sensor which does not cause the phototube to receive a detection light, and a wiper. CONSTITUTION:A switching body 1 is moved in the direction of blocking by driving a motor M, a phototube 55 is operated to project a detection light L from a luminous apparatus 56 to a reflector 33 and, at the same time, and the switching body 1 is continuously moved in the direction of blocking by causing a light receiving apparatus 57 to receive a light. A sensor 21 of the moving end of the switching body 1 is brought into contact with obstacles to make displacement operation, and a wiper 38 is interlocked with an operation of the sensor 21 to remove dust by sliding of the surface of the reflector 33. A detection light L to the reflector 33 is reflected to a position that the light receiving apparatus 57 of the phototube 55 does not receive a detection light L, and a detection signal of the light receiving apparatus 57 and the motor M are stopped to mover reversely in the direction of opening. According to the constitution, the safety can be secured.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Field of Application) The present invention relates to opening/closing devices, such as electrically operated heavy and lightweight shutters and blinds, as well as electrically operated shutters, automatic doors, and overdoors. In particular, it relates to safety devices that occur when the opening/closing body is closed.

(Prior Art) Conventionally, this type of opening/closing device, for example, in the case of an electric shutter, includes a seating body connected to a lowermost slat via a seat plate so as to be movable up and down.
A reflecting plate is provided near one end in the length direction of the seat plate and is rotatably displaced by the up and down movement of the seated body, and a phototube is provided above the reflecting plate for emitting and receiving detection light with respect to the reflecting plate. There is a structure in which an electric motor for opening and closing the shutter is controlled depending on the state of reception of the detection light by the phototube.

(Problem to be Solved by the Invention) In the above structure, when the shutter is lowered, the seated body comes into contact with the obstacle, and the seated body is pushed up by the obstacle, and the seated body rotationally displaces the reflector and detects the This type of shutter is designed to prevent light from being received by the phototube, but since this type of shutter is usually installed outdoors or facing the outdoors, dust may accumulate on the surface of the reflector. In addition, the surface of the reflector plate is easily contaminated by dust, etc. Therefore, the function of the reflector plate may be impaired by dust and the shutter may malfunction, which poses safety and reliability problems, and there is a concern that equipment may be damaged. be.

Therefore, the present invention was created in view of these problems, and it is possible to eliminate dust and the like on the reflector in connection with the opening/closing operation of the opening/closing body, thereby eliminating malfunctions and improving safety and reliability. The purpose of this invention is to provide a switchgear that can ensure safety and prevent damage to equipment.

[Structure of the invention]

(Means for Solving the Problems) The opening/closing device of the present invention includes an opening/closing body that is opened and closed by the drive of an electric motor, a reflector provided at an edge of the opening/closing body in the closing direction, and a reflector provided in the opening/closing direction of the opening/closing body. a phototube that emits detection light along the reflector, receives the detection light through the reflector, and stops or reverses the drive of the motor depending on the state of reception of the detection light; and a phototube that is freely displaceable at the moving end of the opening and closing body. a sensing element provided in the sensor whose movement is regulated and displaced to prevent the phototube from receiving the detection light; and a wiper which slides on the surface of the reflector in conjunction with the displacement operation of the sensing element. It is equipped with the following.

(Function) In the opening/closing device of the present invention, when closing the opening/closing body, the electric motor is driven and the opening/closing body is moved in the closing direction, and while the opening/closing body is moved, the phototube is activated to emit light. Detection light emitted from the device is projected onto the reflector, and this detection light is reflected by the reflector and received by the light receiver. In this light receiving state, the opening/closing member continues to be moved in the closing direction.

Furthermore, when the opening/closing body moves in the closing direction, if the sensing body at the moving end of the opening/closing body comes into contact with an obstacle such as a person or article, or a stopper at the opening/closing end of the opening/closing body, the sensing body will The sensor is displaced by the obstacle or stopper, and the wiper is linked to the movement of the sensor, and the wiper slides the surface of the reflector from one end to the other to remove dust on the surface. etc. are excluded.

Further, as the sensing body is displaced as described above, the detection light emitted from the light emitter of the phototube to the reflector is
The light is reflected to a position where it is not received by the phototube receiver. Therefore, the detection signal from the photocell receiver is stopped, the drive of the electric motor is stopped, the movement of the opening and closing body in the closing direction is stopped, or the opening and closing body is moved in the opening direction on the contrary, thereby ensuring safety. is ensured, and damage to the opening/closing body is prevented.

In addition, when an obstacle is removed from the sensing body or when the sensing body is separated from the stopper, the sensing body automatically returns to its original position. dust on the surface of this reflector is removed, the surface of the reflector is prepared for reflection of the detection light, and the detection light emitted from the phototube to this reflector passes through this reflector. The light is received by the receiver,
The opening/closing body is moved again in the closing direction or opening direction by this light reception signal.

(Example) Hereinafter, one example of the present invention will be described based on the accompanying drawings.

In the shutter device as an opening/closing device shown in the figure, 1
is a shutter as an opening/closing body, and this shutter 1 is
A plurality of horizontally elongated slats 2 are connected in the vertical direction by rotatably connecting the vertically opposing curl parts 3 formed on the upper and lower edges in the width direction, and the lowermost slat The curled portion 3 of No. 2 is configured by rotatably connecting a curled portion 5 formed at the upper end portion of the seating body 4. The shutter 1 is wound up by a winding drum rotated by an electric motor M which is driven in forward and reverse directions within a shutter box 6 fixed above the frontage, and is then rolled back to open and close the frontage. It looks like this. In addition, left and right guide rails 7 are vertically erected at the lower portions of both left and right sides of the shutter box 6, and rail grooves 8 that are open to the inside of the left and right guide rails 7 are formed inside the shutter box 6. The shutter 1 is raised and lowered with both widthwise ends of the shutter 1 inserted into the left and right rail grooves 8, and the frontage is opened and closed.

Further, a vertically extending frame 9 that supports the guide rail 7 is connected and fixed to the inner side of the left and right guide rails 7, and the upper end of this frame 9 is connected to the shutter box 6.
There are communicating openings in both sides of the.

Next, the seating body 4 has a seat plate 10 formed horizontally with a predetermined width, and a pair of front and rear vertical plates 11 are opposed to each other at a predetermined interval at the middle upper part of the seat plate 10 in the width direction. The curled portion 5 is formed on the top plate 12 which is connected between the upper ends of the pair of front and rear vertical plates 11. A guide 13 is fitted into the rail groove 8 of the left and right guide rails 7 so as to be vertically movable and protrudes. Further, the space 14 between the pair of front and rear vertical plates 11 is locked and unlocked by a locking mechanism (not shown) provided near the lower end of the rail groove 8 of the left and right guide rails 7. Left and right lockers 16 having locking portions 15 at their tips are provided so as to be movable forward and backward, and the left and right lockpers 16 are normally locked with their locking portions 15 protruding by an operation lever (not shown), so that they can be used in emergencies. At times, the locking portion 15 is operated to retreat. Further, a locking piece 18 is provided at the lower part of the front edge in the width direction of the seat plate 10 through the front side plate 17 and horizontally protrudes inward in the length direction thereof. At the lower part of the rear edge in the width direction, a bearing recess 19 having a substantially C-shaped cross section and opening at the inner lower part is formed in the length direction, and furthermore, a stopper 20 is provided at the middle lower part in the width direction of the seat plate 10. It is formed in the horizontal direction. Further, a support shaft 22 of a sensing lever 21 as a sensor is fitted into the bearing recess 19 of the seat plate 10 from the length direction thereof, and is freely rotatable in the vertical direction about the bearing recess 19 and the support shaft 22. It is pivoted on.

The sensing lever 21 has a length corresponding to the length of the seat plate 10 and has an upwardly U-shaped cross section.
The support shaft 22 is horizontally integrally formed on the upper end of the rear edge of the bottom plate 23 in the width direction via the rear side plate 24, and An engagement piece 26 that is detachably engaged with the locking piece 18 at its upper end via the front side plate 25 which is higher than the height of the rear side plate 24, and is normally locked with this locking piece 18. is formed in the length direction of the bottom plate portion 23, and a cushioning material 27 made of mohair or the like is fixed to the lower part of the bottom plate portion 23 in the width direction. And, this sensing lever 21 is normally attached to the bearing recess 19 and the support shaft 22 due to its own weight with respect to the seat plate lO.
is rotated inwardly and downwardly with the locking piece 18 as the rotation center, and the engaging piece 26 is locked to the locking piece 18, so that the downward rotation is restricted in an inclined state, and the upward movement is at least in a horizontal position. It can be rotated up to.

Next, a bracket 29 is installed on the rear side plate 28 near one end of the seat plate 10 of the seating body 4, that is, near one of the guide rails 7. It is fixed by screws 32 screwed into screw holes 31 of the rear vertical plate 11 from insertion holes 30 on both sides.

This bracket 29 is formed to extend in the left-right direction, and has a reflection plate 3 as a horizontally elongated reflector on the upper surface of the base 291.
3 is fixed horizontally, and approximately triangular support plates 34 are integrally erected on both left and right edges of the base 291 of this bracket 29, facing each other, and the bases of the left and right support plates 34 are A guide lateral groove 35 with an open front end and left and right sides is formed horizontally at the same level on the left and right sides, and a guide vertical groove with an open front end and left and right sides is formed in the upper part near the front end of the left and right guide lateral groove 35. 36 are formed at the same level and height, and a stopper 37 is protruded forward from the upper end portions of the left and right guide longitudinal grooves 36.

A support shaft 39 of a wiper 38 is pushed through the left and right guide lateral grooves 35 so as to be movable back and forth. The wiper 38 has a main body 40 extending in the left-right direction and having a rectangular cross section, and the support shaft 39 is horizontally projected in the length direction from both left and right ends of the main body 40. A brush 41 that slides on the entire surface of the reflecting plate 33 is protruded from the lower surface of the main body 4o over the entire length thereof, and a brush 41 having a substantially C-shaped cross section is provided on the front side of the main body 4o. A bearing recess 42 is formed in the length direction of the upper surface with an opening. Further, a support shaft 44 of a shielding body 43 is inserted into the left and right guide longitudinal grooves 36 so as to be vertically movable. This shield 43
is a shielding plate 4 that obliquely shields the upper part of the reflection plate 33.
5, this shielding plate 45 is formed to extend in the left-right direction,
The support shaft 44 projects horizontally in the length direction from both left and right ends of the upper end, and the shielding plate 45
An interlocking shaft 46 is horizontally formed at the lower end of the wiper 4o and is rotatably inserted into the bearing recess 42 of the wiper 4o.

Next, horizontally long rectangular insertion openings 47 are formed on the left and right sides near one end of the rear plate $24 of the sensing lever 21, and a mounting plate 49 for the actuating lever is formed in the left and right insertion openings 47.
are inserted, and the left and right mounting plates 49 are fixed onto the bottom plate portion 23 of the sensing lever 21 with a plurality of screws 50. Further, the left and right operating levers 48 have an engaging portion 52 formed between the vertical portion 51 and the mounting plate 49 that engages on the rear plate portion 28, and the vertical portion 5I. An insertion hole 53 is formed in the vertical direction, and the wiper 38 is inserted into the insertion hole 53 of the left and right vertical portions 51.
The left and right support shafts 39 are rotatably inserted therethrough.

Next, a mounting frame 54 is provided in the shutter box 6 corresponding to the upper position of the reflecting plate 33, and this mounting frame 5
A phototube 53 for emitting and receiving detection light is installed at 4, and this phototube 55 has a light emitting device 56 that emits light toward the reflecting plate 33 on its outer side, and a light emitting device 56 that emits light toward the reflecting plate 33 on its inner side. It is configured by arranging light receivers 57 that receive reflected light in parallel. The light emitter 56 and the light receiver 5
7 is connected to a control device 59 via a cable 58, and this control device 59 drives and controls the electric motor M according to the opening and closing of the shutter 1 and the operation of a stop switch, etc., and also controls the phototube 55. Control this photocell 5
The electric motor M is driven and controlled by the signal from 5. Note that 50 indicates the guide rails 7 on both the left and right sides.
This is the lower frame installed between the lower ends of the .

Next, the operation of the above configuration will be explained.

First, in the normal state before the shutter 1 is opened and closed, the sensing lever 2 is moved as shown in FIGS.
1 rotates downward around the bearing recess 19 and the support shaft 22 due to its own weight, and the engagement piece 26 of the front plate 24 engages the seat plate 1.
It hangs diagonally inward in a state where it is locked on the locking piece 18 of 0 and assumes an inclined state. In addition, when the sensing lever 21 is rotated downward, the wiper 38 is brought close to the front edge of the reflector 33 by the left and right operating levers 48, and the shield 43 is vertically moved to the front end of the wiper 38. The upper part of the reflecting plate 33 is open so that it can receive and reflect detection light.

Next, when closing the shutter 1, when the shutter closing switch is operated, the control device 59 is activated, the electric motor M is driven, and the winding drum is rotated in the direction of unwinding the shutter 1. Shutter 1 that is about to be rewound and fed out from shutter box 6
is guided by the guide grooves 8 of the left and right guide rails 7, and is rolled back and lowered. Further, as mentioned above, the control device ij [59
is activated, the phototube 55 is activated, and the detection light emitted from the light emitter 56 is projected onto the reflection plate 33, and this detection light is reflected upward by the reflection plate 33 and is transmitted to the light receiver 57. Light is received, and in this light receiving state, the control device 59 continues to control the electric motor M so that the shutter 1 continues to be lowered.

Further, when the shutter 1 is lowered, if the bottom plate part 23 of the sensing lever 21 at the lower end comes into contact with an obstacle such as a person or article, or the lower frame 6o, the sensing lever 21 will be moved by the obstruction or the lower frame 6o. As shown in FIG. 6, it is rotated in the clockwise direction in FIG. The wiper 38 is guided by the left and right operating levers 48 through the insertion hole 53 and the support shaft 39 into the left and right guide lateral grooves 35, and is moved from the front edge of the reflector 33 toward the rear edge. The brush 41 slides on the surface of the reflecting plate 33 and removes dust and the like on this surface. Further, the wiper 38 is moved by the left and right operating levers 48, and the shielding body 43, which is rotatably connected to the wiper 38 via the bearing recess 42 and the interlocking shaft 46, is moved between the left and right guide vertical grooves 36 and the support shaft. 44, and the shielding plate 45 of the shielding body 43 is rotated downward toward the upper part of the reflecting plate 33. Then, as shown in FIG. 6, the engagement piece 2 of the sensing lever 21 has been disengaged upward from the engagement piece 18 of the seat plate lO.
6 is locked to the lower surface of the seat plate 1G, and the mounting plates 49 of the left and right operating levers 48 are locked to the stopper 20 of the seat plate 10. It moves to the rear end edge and is locked, that is, the left and right support shafts 39 of the wiper 38 are locked in the blind portions of the rear end in the left and right guide lateral grooves 35, and its movement is stopped.
The shielding plate 45 projects obliquely relative to the upper part of the reflecting plate 33, and the optical axis region of the upper part of the reflecting plate 33 is reliably shielded by this shielding plate 38. Further, the upper part of the reflector 31 is shielded by a shield plate 45, and the detection light emitted from the light emitter 56 of the phototube 55 is transmitted to the reflector 31.
The light is projected onto the shielding plate 45 without being reflected by the light emitting and being reflected by the light receiver 57, and this detected light is reflected by the inclined shielding reflection surface of the shielding plate 45 onto the seated body 4 at the rear of the shielding plate 45. reflected inward. Therefore, the detection signal from the photodetector 57 of the phototube 55 is stopped,
Upon receiving this, the control device 159 controls the drive of the electric motor M, and the winding down of the shutter 1 is stopped, or the shutter 1 is reversely rolled up and raised. Damage is prevented.

Further, by removing an obstacle from the lower part of the shutter 1 or by separating the sensing lever 21 from the lower frame 60, the sensing lever 21 automatically moves downward in the counterclockwise direction in FIGS. 4 and 5 due to its own weight. At the same time, the wiper 38 is moved back while sliding on the surface of the reflecting plate 33 toward the front edge, and the brush 41 of the wiper 38 moves the reflecting plate 33 Dust on the surface of the reflector 33 is removed and the surface of the reflector 33 is prepared again for reflection of the detection light. Furthermore, as the wiper 38 is returned to its original position, the shielding plate 45 of the shielding body 43 is gradually pushed upward from the tilted state in conjunction with this movement. Then, the engaging piece 26 of the sensing lever 21 is again locked to the locking piece 18, and the wiper 38 is connected to the reflecting plate 33.
The shielding plate 43 is returned to the front edge of the wiper 38 in a vertical position again, and the shielding plate 45 is removed from the optical axis region of the detection light of the phototube 55 and the reflection plate 33 The upper part of is opened again. Further, the upper part of the reflection plate 33 is opened, and a light reception signal from the light receiver 57 of the phototube 55 is outputted to the control device 59.
By the operation of 9, the shutter 1 is again rolled back and lowered or rolled up and raised again.

In this way, the sensing bar 21, the reflecting plate 33, the photocell 5
5. Shutter 1 by shielding body 43 and wiper 38
It is possible to reliably detect the presence of obstacles such as people and objects, the lower frame 60, etc. in the lower part, and ensure safety when the shutter 1 is closed. Dust and the like are removed from the surface of 33.

In the embodiment described above, the reflecting plate 33 is fixed, and this reflecting plate 33
Although the case has been described in which the wiper 38 is slid by the displacement operation of the sensing lever 21 with respect to the surface portion of The wiper sheath 38 may be slid against.

〔Effect of the invention〕

According to the present invention, a sensing body is provided at the moving end of the opening/closing body so as to be freely displaceable so that the phototube does not receive the detection light for the reflector, and a wiper that moves along the surface of the reflector is attached to the sensing body. By interlocking these, the wiper can reliably remove dust on the reflector during the opening/closing operation of the opening/closing body, thereby reliably preventing the opening/closing body from malfunctioning and preventing unexpected Therefore, it is possible to provide a switchgear that can prevent such situations from occurring, ensure safety and reliability, and prevent equipment damage accidents.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a front view of the opening/closing device, Fig. 2 is a perspective view with a part of the above removed, Fig. 3 is a front view of the above, and Fig. 4 is a to a of the above. 5 is a cross-sectional view taken along the line bb in FIG. 3, FIG. 6 is a cross-sectional view of the same in the operating state, and FIG. 7 is an exploded perspective view of the same. 1...Opening/closing body, 21...Sensing body, 33...Reflector, 38
・・Wiper, 55・・Phototube, L・・Detection light, M・・
Electric motor.

Claims (1)

[Claims] (1) An opening/closing body that is opened and closed by the drive of an electric motor, a reflector provided at the edge of the opening/closing body in the closing direction, and a detection light emitted along the opening/closing direction of the opening/closing body via the reflector. a phototube that receives the detection light and stops or reverses the driving of the motor depending on the state of reception of the detection light; An opening/closing device comprising: a sensing body that prevents the phototube from receiving the detection light; and a wiper that slides on the surface of the reflector in conjunction with the displacement operation of the sensing body.