JP2514709B2 - Switchgear - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to an opening / closing device, for example, an electric weight and lightweight shutter or blind, an electric shutter, an automatic door, an overdoor, and the like. The present invention relates to a safety device when the opening / closing members are closed.

(Prior Art) Conventionally, as an opening / closing device of this type, in the case of an electric shutter, for example, a seat body is vertically movably connected to a lowermost slat via a seat plate, and
A reflecting plate is provided near one end in the length direction of the seat plate so as to be rotated and tilted by the movement of the seat body, and a projector for projecting detection light toward the reflecting plate above the reflecting plate, and There is a structure in which a light receiver for receiving the detection light reflected by the reflection plate is provided and the electric motor for opening and closing the shutter is controlled according to the light receiving state of the detection light.

(Problems to be Solved by the Invention) In the structure of the conventional shutter, when the seating body is restrained from descending while the seating body is seated when the shutter is descended, the reflection plate is pivotally tilted by the seating body, and the reflection plate is Although the detection light is not received by the light receiver, this type of shutter is usually installed outdoors or facing the outdoors, so dust etc. may be left on the surface of the reflector. The surface of the reflection plate is easily adhered to the surface of the reflection plate, and therefore the reflection function of the reflection plate may be impaired due to dust and the like, which may cause the shutter to malfunction, which poses a safety and reliability problem and may damage the device. is there.

Therefore, the present invention has been made in view of such a problem, and it is possible to reliably remove dust and the like on the reflector in association with the opening / closing operation of the opening / closing body, and thus eliminate malfunction of the opening / closing body. It is an object of the present invention to provide a switchgear capable of ensuring safety and reliability and preventing damage to equipment.

(Means for Solving the Problem) An opening / closing device according to the present invention includes an opening / closing body that is moved up and down by driving an electric motor, a reflector provided at a lower end edge of the opening / closing body, and a position above the reflector. When the detection light is shielded, the electric motor is driven by the projector that projects the detection light toward the reflector and the receiver that receives the detection light reflected by the reflector. A detection device that outputs a signal for stopping or reversing, a sensor provided at the lower edge of the opening / closing body and displaced by abutting against the regulating portion when the opening / closing body descends, and interlocked with the displacement operation of the sensor. A retractable shield that shields the detection light projected from the projector toward the reflector, and the reflector that is rotatably provided at the lower end of the shield and is interlocked with the advance / retreat operation of the shield. With a wiper that slides along the surface of , Are provided.

(Operation) In the opening / closing device of the present invention, when the entrance / exit is closed by the opening / closing body, the opening / closing body is lowered by driving the electric motor. Further, as the opening / closing body is lowered and the detection device is activated, the detection light is projected from the projector toward the reflector, and the detection light is reflected by the reflector and is received by the light receiver. The drive is continued and the opening / closing body is continuously lowered.

Also, when the opening / closing body descends, if the sensing body at the lower end of the opening / closing body comes into contact with the descending end regulating portion of the opening / closing body, or comes into contact with an obstacle such as a person or an article, the regulating portion or the like is used. The sensing body is displaced, and in conjunction with the displacement operation of the sensing body, the shield advances toward the upper portion of the reflector, and the shield shields the detection light projected toward the reflector. .

Moreover, the detection light is shielded by the shield, and the detection light emitted from the projector of the detection device is not received by the light receiver by the shield that shields the reflector from above. And
When the detection light is no longer received by the light receiver, the drive of the electric motor is stopped by the signal from the detection device and the lowering of the opening / closing body is stopped, or the opening / closing body is raised in reverse. Therefore, since the opening / closing body is not further lowered, safety is ensured and damage to the opening / closing body is prevented.

In addition, a wiper provided at the lower end of the shield is interlocked with the shield, and this wiper slides on the surface of the reflector from one end to the other, and the wiper moves the surface of the reflector onto the surface. Dust etc. is eliminated.

In addition, when the obstacle is removed from the sensor or the sensor is separated from the lower end of the opening / closing body, the sensor is displaced again, and the shield moves backward from above the reflector in conjunction with this sensor. To be done. Further, the wiper slides on the surface of the reflector in the same manner as the shield moves backward, so that the wiper is similarly returned to remove dust and the like on the surface of the reflector.

Then, the detection light emitted from the projector of the detection device toward the reflector is reflected by the reflector and received by the light receiver, and the output signal from the detection device drives the electric motor, which opens and closes by the electric motor. The body is lowered or raised again.

(Embodiment) An embodiment of the present invention will be described below with reference to the accompanying drawings.

In the shutter device as the opening and closing device shown in the figure,
Reference numeral 1 denotes a shutter as an opening / closing member that opens and closes the entrance and exit, and this shutter 1 is composed of a plurality of slats 2 which are horizontally long.
Of the slats 2 are vertically connected to each other by rotatably connecting the curl portions 3 which are vertically opposed to each other and which are formed at the upper and lower edges of the slats 2 in the width direction.
A curl portion 5 formed on the upper end of the seating body 4 is rotatably connected to the curl portion 3. Further, a shutter box 6 having a winding drum that is rotationally driven by an electric motor M that is driven to rotate forward and backward is fixed to the upper end portion of the entrance and exit, and the shutter 1 is wound onto the winding drum inside the shutter box 6. It can be wound and rewound freely,
The shutter 1 is raised and lowered by the rotation of the winding drum.

Further, left and right guide rails 7 in the up-and-down direction are vertically installed opposite to each other at lower portions of both ends of the shutter box 6 in the left-right direction. Grooves 8 are respectively formed, and the upper end portions of the left and right rail grooves 9 are formed on the shutter box 6.
It is connected to each inside. The shutter 1 is moved up and down along the left and right rail grooves 8, and the shutter 1 opens and closes the entrance. Further, a frame body 9 extending in the up-down direction for supporting the guide rails 7 is provided inside the left and right guide rails 7.
Are connected and fixed, and the upper end of the frame 9 is communicated with both sides of the shutter box 6.

Next, the seating body 4 has a seat plate 10 having a predetermined width and the same length as each slat 2, and a pair of front and rear vertical plates 11 is provided at a predetermined interval in the middle upper part of the seat plate 10 in the width direction. The curl portion 5 is formed on the top plate 12 that is vertically installed integrally with the vertical plate 11 in front of and behind the vertical plate 11.
Further, guides 13 that are vertically movably fitted in the rail grooves 8 of the left and right guide rails 7 project from both ends of the front and rear vertical plates 11 in the longitudinal direction.

Further, in the space 14 between the front and rear vertical plates 11, a lock mechanism (not shown) provided in the vicinity of the lower ends of the rail grooves 8 of the left and right guide rails 7 locks and unlocks. The left and right lock bars 16 having the locking portion 15 at the tip end are provided so as to be able to move forward and backward, and the left and right lock bars 16 are always locked by the operating lever (not shown) with the locking portion 15 protruding. In an emergency, the locking portion 15 is operated to retract.

A front side plate 17 is provided at the lower end of the front edge of the seat plate 10 in the width direction.
Is formed, and a horizontal locking piece is formed on the lower end of the front side plate 17.
18 is provided so as to project inward, and a bearing concave portion 19 having a substantially C-shaped cross section is formed in the lower portion of the rear edge of the seat plate 10 in the width direction so as to open the inner lower portion. Further, a stopper 20 is integrally protruded from an intermediate lower portion of the seat plate 10 in the width direction.

Next, 21 is a sensing lever disposed below the seat plate 10, and this sensing lever 21 has a substrate portion 23 formed to have a length corresponding to the length of the seat plate 10. A rear side plate portion 24 is integrally erected on the upper rear edge of the width direction of the portion 23, and a support shaft 22 rotatably fitted in the bearing recess 19 is horizontally provided at the upper end portion of the rear side plate portion 24. Are integrally formed into a shape. Also,
A front side plate portion 25, which is higher than the height of the rear side plate portion 24, is integrally erected on the upper portion of the front edge in the width direction of the base plate portion 23, and the locking piece 18 is engaged with the upper end portion of the front side plate portion 25. An engagement piece 26 that is detachably locked is formed horizontally. Further, a cushioning material made of mohair is provided on the lower part of the front end of the board portion 23 in the width direction.
27 are anchored.

The sensing lever 21 is displaceably supported, that is, pivotally supported in a vertical direction about a support shaft 22 fitted in the bearing recess 19. As a result, the sensing lever 21 normally rotates downward with respect to the seat plate 10 about the support shaft 22 fitted into the bearing recess 19 due to its own weight. By engaging the engaging piece 26 with the stop piece 18, downward rotation is restricted in an inclined state. Further, when the sensing lever 21 is pushed by an obstacle, the sensing lever 21 is turned upward about the support shaft 22 so that it can be turned at least up to a horizontal posture.

Next, 29 is a bracket which is located near one end of the seat plate 10 of the seating body 4, that is, near one guide rail 7, and is installed on the rear plate part 28 of the seat plate 10. The brackets 29 are fixed by screws 32 screwed into the screw holes 31 formed in the vertical plate 11 at the rear of the seat 4 from the through holes 30 on both the left and right sides.

The bracket 29 has a base 29a extending in the left-right direction, and a reflector 33 as a left-right reflector is horizontally fixed to the upper surface of the base 29a. Also,
Substantially triangular support plates 34 are erected integrally at opposite end portions of the base 29a in the left-right direction, and the base portions of the left and right support plates 34 have front end portions and left-right portions opened in the front-rear direction. The guide lateral grooves 35 are formed horizontally at the same level on the left and right. Further, guide vertical grooves 36, which are located above the front ends of the left and right guide lateral grooves 35 and have front end portions and left and right portions opened, are formed at the same level and at the same height on the front side portions of the left and right support plates 34. At the upper ends of the left and right guide vertical grooves 36, stoppers 37 project forward, respectively.

Next, 38 is a wiper that slides on the surface portion of the reflection plate 33, and this wiper 38 has a main body 40 having a rectangular cross section that extends in the left-right direction. A support shaft 39 inserted in the left and right guide lateral grooves 35 so as to be movable back and forth.
Is projected horizontally in the length direction. A brush 41, which slides along the entire surface of the reflection plate 33, is provided on the lower surface of the main body 40 so as to project over the entire length in the length direction. Further, a bearing recess 42 having a substantially C-shaped cross section is formed at the front edge of the main body 40 with the upper surface thereof being opened.

Further, 43 is a shield that shields the upper part of the reflection plate 33, and this shield 43 has a horizontal shield plate 45 that obliquely shields the upper part of the reflection plate 33. A support shaft 44 in the left-right direction is integrally formed at the upper end, and both ends of the support shaft 44, that is, a support shaft horizontally projected outward from both ends in the left-right direction of the shielding plate 45. Both protruding end portions of 44 are vertically movably inserted in the left and right guide vertical grooves 36. An interlocking shaft 46 is integrally formed horizontally at the lower end of the shielding plate 45, and the interlocking shaft 46 is rotatably inserted and supported in the bearing recess 42 of the wiper 38.

The shield 43 is moved up and down along the left and right guide vertical grooves 36 of the bracket 29 via the support shaft 44, and the wiper 38 is interlocked with the up and down movement of the shield 43. The wiper 38 is mounted on the bracket via a support shaft 39.
The shield plate 45 of the shield 43 is moved back and forth along the left and right guide lateral grooves 35 of 29, and is moved back and forth with respect to the upper portion of the reflector 33.

Next, horizontally elongated rectangular insertion openings 47 are formed in the left and right portions of the rear plate portion 24 of the sensing lever 21, and the mounting plates 49 of the operating levers 48 are inserted into the left and right insertion openings 47, respectively, and The left and right mounting plates 49 are fixed to the base plate portion 23 of the sensing lever 21 by a plurality of screws 50, respectively. The left and right actuating levers 48 have an engaging portion 52 that engages on the rear plate portion 28 between the vertical portion 51 and the mounting plate 49, and the vertical portion 51 is vertically inserted. Hole 53
And the wiper 38 is formed in the insertion holes 53 on the left and right.
Left and right support shafts 39 are rotatably inserted.

Then, the sensing lever 21 is rotated in the vertical direction about the support shaft 22, and the shield 43 and the shield 43 are rotated by the rotation of the sensing lever 21 via the left and right actuating levers 48. The wipers 38 rotatably supported at their lower ends are interlocked with each other.

Further, 55 is a detection device attached to an attachment frame 54 in the shutter box 6 corresponding to a position above the reflection plate 33, and the detection device 55 projects detection light L toward the reflection plate 33. And a light receiver 57 that is installed in parallel with the light projector 56 and receives the detection light L reflected by the reflector 33.
And have. Further, the light projector 56 and the light receiver 57 are connected via a cable 58 to a control device 59 for controlling the electric motor M.

Then, the control device 59 is operated by operating the switch for opening and closing the shutter 1, and the control device 59 is operated.
Is configured to drive the electric motor M in the forward or reverse direction, and when the detection light L is shielded by the shield plate 45 of the shield 43, the electric motor M is transferred from the control device 59 to the electric motor M. A signal for stopping or reversing the driving of M is output. Incidentally, 60 is a lower frame laid between the lower ends of the guide rails 7 on both the left and right sides.

 Next, the operation of the above embodiment will be described.

First, in the open state of the shutter 1 and in the normal state before the completion of closing, as shown in FIG. 2 to FIG.
21 is in a state in which it is rotated downward about the support shaft 22 in the bearing recess 19 of the seating body 4 by its own weight, and the engagement piece 26 of the front side plate portion 25 thereof has the engagement piece 18 of the seat plate 10. It is slanted inward and slanted while it is locked on top.
Also, when the sensing lever 21 is rotated downward,
The left and right actuating levers 48 bring the wiper 38 closer to the front edge of the reflector 33, and the shield 43 is held vertically above the front edge of the wiper 38, and the horizontal reflector 33 is , The detection light L is open to the upper part thereof so as to be incident and reflected.

Next, when closing the shutter 1, when the switch for closing the shutter is operated, the control device 59 is operated, the electric motor M is driven, and the winding drum rotates in the rewinding direction of the shutter 1. Then, the winding drum feeds the shutter 1 from the inside of the shutter box 6, and the shutter 1 is guided by the guide grooves 8 of the left and right guide rails 7 and is sequentially lowered.

Further, as described above, the control device 59 is operated and the detection device 55 is operated, and the detection light L is emitted from the projector 56 of the detection device 55 toward the reflection plate 33. The light is reflected by the reflection plate 33 toward the upper side and received by the light receiver 57, and the control device 59 continues to control the electric motor M so that the shutter 1 is continuously lowered by the received light signal.

Next, when the shutter 1 descends, if the substrate portion 23 of the sensing lever 21 at the lower end of the shutter 1 comes into contact with an obstacle such as a person or an article or a regulating portion such as the lower frame 60, the obstacle or the lower portion The sensing lever 21 is pushed by the frame 60, the sensing lever 21 is moved upward in the clockwise direction in FIG. 6 about the support shaft 22 in the bearing recess 19 of the seating body 4, and the sensing lever 21 is moved. Left and right actuating levers 48 integrated with 21
Are similarly rotated.

Further, when the left and right actuating levers 48 are rotated, the left and right support shafts 39 inserted into the insertion holes 53 of the left and right actuating levers 48.
Are moved by being guided by the left and right guide lateral grooves 35, and the wiper 38 having the left and right support shafts 39 is moved from the front end edge portion to the rear edge portion of the reflection plate 33, and the reflection plate is provided by the brush 41 of the wiper 38. While sliding on the surface of 33, dust and the like on this surface is removed.

Further, the wiper 38 is moved by the left and right actuating levers 48, and the interlocking shaft 46 engaged in the bearing recess 42 of the wiper 38 is interlocked with the moving direction of the wiper 38, and the interlocking shaft 46 causes the shield 43 to move. When the shield is pulled, the shield 43 is interlocked and lowered via the left and right guide vertical grooves 36 and the support shaft 44, and the shield plate 45 of the shield 43 is advanced and rotated toward the upper portion of the reflection plate 33. It

Then, as shown in FIG. 6, the engaging piece 26 of the sensing lever 21 which is disengaged upward from the locking piece 18 of the seat plate 10 is brought into contact with the lower surface portion of the seat plate 10 and the left and right actuating levers 48 are moved. The mounting plate 49 is a seat plate
It comes into contact with stopper 20 of 10 and wiper 38
The brush 41 is locked to the rear end edge of the reflection plate 33, and the left and right support shafts 39 of the wiper 38 are locked to the blind parts at the rear end of the left and right guide lateral grooves 35 to stop the movement. It Further, the shielding plate 45 is advanced so as to project in an inclined state with respect to the upper portion of the reflecting plate 33, and the optical axis region of the upper portion of the reflecting plate 33 is reliably shielded by this shielding plate 45.

In addition, the upper portion of the reflector 31 is shielded by the shield 45, and the detection light L emitted from the projector 56 of the detection device 55 is not received by the reflector 33 and the receiver 57, and is blocked. The detection light L projected onto the plate 45 is reflected by the inclined shield reflection surface of the shield plate 45 toward the rear portion of the position where it is not received by the light receiver 57.
Further, when the detection signal from the light receiver 57 of the detection device 55 is stopped, a control signal is output from the control device 59 to the electric motor M to control the driving of the electric motor M. The rewinding and descending of No. 1 is stopped, or the shutter 1 is reversely raised. Therefore, when the shutter 1 descends, the sensing lever 21 is blocked by the obstacle or the lower frame 60.
Since the lowering of the shutter 1 is stopped when the shutter is rotated, safety is ensured and damage to the shutter 1 is prevented.

Next, the obstacle is removed from the lower portion of the shutter 1, and the downward movement of the sensing lever 21 is not regulated by the regulating portion separated from the lower frame 60.
Due to its own weight, it automatically returns from the state shown in FIG. 6 downward in the counterclockwise direction as shown in FIGS. 4 and 5, and is interlocked with the rotation of the sensing lever 21. The wiper 38 is moved back while sliding on the surface of the reflector 33 toward the front edge, and the brush 41 of the wiper 38 removes dust on the surface of the reflector 33.
The surface of the reflection plate 33 is prepared again for the reflection of the detection light L.

Further, the wiper 38 is moved back, and the shield plate 45 of the shield 43 is interlocked with the wiper 38 and gradually pushed up in a vertical direction from an inclined state inclined with respect to the reflection plate 33. Then, the engagement piece 26 of the sensing lever 21 is again locked to the locking piece 18, the wiper 38 is returned to the front end edge portion of the reflection plate 33, and the shield 43 is located above the front edge of the wiper 38. Then, the shielding plate 45 is removed from the optical axis region of the detection light L, and the upper portion of the reflecting plate 33 is opened again.

Further, the upper portion of the reflection plate 33 is opened, and the light receiver 57 of the detection device 55 receives the detection light L reflected by the reflection plate 33, and the light reception signal from the control device 59 to the electric motor M causes a control signal. Is output, and the shutter 1 is rewound and lowered or raised by the electric motor M again.

In this manner, the sensing lever 21, the reflection plate 33, the detection device 55, and the shield 43 can reliably detect the presence of an obstacle such as a person or an article at the lower portion of the shutter 1 and a restricting portion such as the lower frame 60. The safety of the wiper 38 in connection with the opening / closing operation of the shutter 1
Thus, dust and the like are removed from the surface of the reflection plate 33.

(Effect of the Invention) According to the present invention, a sensing body that is displaced by contacting the regulating portion when the opening / closing body descends is provided at the lower edge of the opening / closing body, and the opening / closing body is interlocked with the operation of the sensing body. A motor that opens and closes the opening / closing body when the detection light is shielded by a shield that shields the detection light projected toward the reflector fixed to the lower end edge of the Since a detection device for outputting a signal for stopping or reversing the drive of the electric motor is provided, a wiper sliding along the surface portion of the reflector is rotatably provided at the lower end portion of the shield,
When the opening / closing body is closed, the sensing part is displaced and moved by the regulation part, so that the detection light projected toward the reflector by the shield interlocked with the sensing part is received by the light receiver of the detection device. It is possible to reliably shield the top of the reflector so as not to cause it, and it is possible to reliably remove dust and the like on the reflector by the wiper provided at the lower end of the shield. Since the reflector does not reflect the detection light toward the receiver when dust is attached to it, it is possible to reliably prevent the opening / closing body from malfunctioning. It is possible to prevent an unexpected situation in which the opening / closing body descends in spite of the existence of the above-mentioned condition. Therefore, it is possible to ensure safety and reliability and prevent accidents such as equipment damage. Provide switchgear It is possible.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a front view of an opening / closing device, FIG. 2 is a perspective view of the opening and closing part partially omitted, FIG. 3 is a front view of the same, FIG. FIG. 5 is a sectional view taken along the line a-b, FIG. 5 is a sectional view taken along the line b-b of FIG. 3, FIG. 6 is a sectional view of the same operating state, and FIG. 1 …… Opening / closing body, 21 …… Sensor, 33 …… Reflector, 38 …… Wiper, 43 …… Shielding body, 55 …… Detecting device, 56 …… Emitter, 57 …… Receiver, L …… Detecting Light, M ... electric motor.

Claims (1)

(57) [Claims] 1. An opening / closing body which is moved up and down by driving an electric motor, a reflector provided on a lower edge of the opening / closing body, and a detection light which is provided above the reflector and projects toward the reflector. A detection device that has a light projector that emits light and a light receiver that receives the detection light reflected by the reflector, and outputs a signal to the electric motor to stop or reverse the drive of the electric motor when the detection light is shielded; A sensor provided at a lower end edge of the opening / closing body and displaced by coming into contact with a restricting portion when the opening / closing body descends; and a light projecting from the projector toward a reflector in association with a displacement operation of the sensor. An advancing / retreating shield that shields the detected light, and a wiper that is rotatably provided at the lower end of the shield and slides along the surface of the reflector in conjunction with the advancing / retreating operation of the shield. A switchgear characterized by comprising: