JPH08114076A - Safety device of motor-driven expansion gate - Google Patents

Abstract

PURPOSE: To greatly enlarge a detectable range by providing an obstacle- detecting sensor on a muntin provided at the moving end of a door, and enabling the detector to detect an obstacle if the obstacle touches the muntin at the outermost moving end and to provide a desirable design by preventing the detecting member from projecting so that no clearance forms between each gatepost and a door main body. CONSTITUTION: A four-way frame constructed of four muntins 5 is formed at the advancing end of a door 1, and a drive 3 is connected and fixed to the front and rear muntins directed in the retreating direction, and is provided with a switch for stopping drive. Between a connecting member provided below the space between the front and rear muntins 5 directed in the advancing direction and the switch, an operating member 10 which, when an obstacle abuts to the end of the door, presses the switch with the connecting member 8 therebelow approaching the muntins 5 directed in the retreating direction, is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for an electrically-operated expandable telescopic gate, in which a detector for detecting an obstacle is provided on a four-sided frame provided at the front end of the door in the traveling direction.

[0002]

2. Description of the Related Art Conventionally, a door body having a pantograph type expansion / contraction mechanism is mounted on a guide rail, and a traction wheel driven by an electric motor is provided at a lower end of a moving side end of the door body. A safety device is provided to project an operating rod outside the moving side end, and when the operating rod comes into contact with a person, a car, or other obstacles, the electric motor is immediately stopped.
No. 8 publication).

[0003]

However, in the above-mentioned prior art, the operating rod is projected on the outer side of the moving side end of the door, and the operating rod is contacted with the operating rod so that it is provided between the column and the door. Since it senses the presence of obstacles, it can sense only a small range of sensing, which is only the operating rod outside the moving side end, and there is a problem that it is not perfect in terms of safety.

Further, it is a protruding operating rod which is not preferable in appearance, and since this operating rod also serves as a fully closed limit switch, when it is fully closed, the operating rod sticks out to the extent of the door stop gate pole. A gap is created between the door body and the door body, which is not desirable in terms of appearance design.

In view of such circumstances, the present invention solves the above-mentioned problems of the prior art and uses a simple structure to detect an obstacle in a four-sided frame provided at the front end of the door body in the traveling direction. Since it is equipped with, it is possible to detect when the vertical bar itself, which is the leading edge of the four-way frame in the traveling direction, touches an obstacle. Therefore, the sensing range is significantly wider. Moreover, since the member for detecting and sensing does not project, there is no gap between the doorpost gate post and the door body, and it is an object of the present invention to provide a safety device for an electrically retractable telescopic gate that is also preferable in terms of external design. is there.

[0006]

The present invention is intended to solve the above-mentioned problems, and employs the following technical means. In the invention according to claim 1, at the front end portion of the door body in the traveling direction,
Four vertical bars are provided facing each other in the advancing / retreating direction of the door and in the front-rear direction orthogonal to the advancing / retreating direction. A vertical connecting member is provided between the longitudinal bars in the front-rear direction, and between the vertical bars in the advancing / retreating direction. , A connecting member is provided above to form a four-sided frame, the drive device is connected and fixed to the front and rear vertical bars on the retreating direction side, and the drive device is provided with a switch for stopping the drive, and between the front and rear vertical bars on the traveling direction side. If an obstacle comes into contact with the tip of the door between the connecting member provided in the lower part of the switch and the switch, the operating member pushes the switch while the lower connecting member moves closer to the vertical rail side in the backward direction. Was adopted.

In the second aspect of the invention, a technical means is employed in which the actuating member of the first aspect of the invention is provided in a connecting member provided in a lower portion between the front and rear vertical bars on the traveling direction side.

In the third aspect of the invention, the technical means of providing the actuating member of the first aspect of the invention in the drive device is adopted.

In the invention described in claim 4, claims 1 to
The technical means of replacing the connecting member provided between the vertical rails in the advancing / retreating direction of the invention according to any one of claims 3 with a cross member or a cross member.

In the invention described in claim 5, claims 1 to
In the invention according to any one of claims 4 to 5, the front and rear vertical bars on the advancing direction side are replaced with those which are adapted to approach the vertical bars on the retreating direction side by bending downward.

In the invention according to claim 6, four longitudinal bars are provided at the forward end of the door body in the advancing direction of the door body so as to face each other in the advancing / retreating direction of the door body and in the front-rear direction orthogonal to the advancing / retreating direction. A connecting member is provided vertically between the crosspieces, and a diagonal member or a cross member is provided between the vertical crosspieces in the advancing / retracting direction. By providing elastic members that work in the direction of spreading each other, forming a four-sided frame with a slidable pantograph function, the drive device is connected and fixed to the front and rear vertical bars on the retreating direction side, and the drive device is driven. A switch to stop is provided, and if an obstacle comes into contact with the tip of the door between the switch and the connecting member provided at the lower part between the front and rear vertical bars on the advancing direction side, the lower connecting member will cause the vertical direction on the retreating direction side. A technique to provide an operating member that pushes the switch while moving closer to the crosspiece. It was adopted means.

In the invention of claim 7, a technical means is adopted in which the actuating member of the invention of claim 6 is provided in a connecting member provided in a lower portion between front and rear vertical bars on the traveling direction side.

In the invention described in claim 8, a technical means is adopted in which the actuating member of the invention described in claim 6 is provided in a drive device.

In the invention described in claim 9, claims 1 to
A technical means of providing an elastic member for urging the switch pushing portion of the actuating member of the invention according to any one of claims 8 to separate from the switch is adopted.

[0015]

According to the present invention, by adopting the above-mentioned technical means, when the obstacle hits the vertical cross-section of the four-way frame provided at the front end of the door body in the traveling direction, the vertical cross-section at the leading end in the traveling direction, Since the detector for detecting through the actuating member is provided so as to detect and stop the driving device, the leading end vertical bar of the four-sided frame itself serves as a sensing plate, thereby expanding the sensing range. Moreover, since the sensing member does not project as in the conventional case, no gap is created between the door post and the door body. Further, according to this four-sided frame structure, when a force is applied below the connecting member connecting the advancing / retreating directions, some elastic action occurs in the advancing / retreating direction, so that it can function as a conventional detection plate. . That is, when an obstacle hits, the frontmost vertical bar in the advancing / retreating direction contracts inward and pushes the operating member to operate the switch. After the obstacle is removed, the elastic member and the elastic member provided on the operating member of the switch surely return to the original position by the elastic action.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. What is shown in FIG. 3 is a schematic front view showing the entire electric opening / closing type telescopic gate of the present invention.

First, the overall image will be outlined. 1 is the door
Reference numeral 2 is a guide rail, 3 is a drive device, 4 is a traction wheel, 5 is a vertical rail that forms a four-way frame on which the drive device is installed, and 6 is a vertical rail 5.
Detection that consists of limit switch actuating members, etc. that detect obstacles provided at appropriate positions below the inside of the vehicle (for example, the lower horizontal rail that is a connecting member that spans the lower portion between the vertical rails before and after the tip in the traveling direction) Shows each container.

Next, a safety device for an electrically-operated telescopic gate, which is an embodiment of the present invention, will be described in detail with reference to FIGS. At the front end of the door body 1 in the traveling direction, four vertical bars 5 are provided to face each other in the forward / backward direction of the door body 1 and in the front / rear direction orthogonal to the forward / backward direction, and the vertical bars 5 are vertically connected to each other. A member 8 is provided, a connecting member is provided between the vertical bars 5 in the advancing / retracting direction to form a four-sided frame, and the driving device 3 is connected and fixed to the front and rear vertical bars 5 on the retreating direction side and driven by the driving device 3. A switch 12 for stopping the operation is provided, and when an obstacle comes into contact with the leading end of the door body 1 between the switch 12 and the connecting member 8 provided in the lower portion between the front and rear vertical bars 5 on the traveling direction side, the lower connecting member A safety device for an electrically-operated expandable telescopic gate provided with an operating member 10 that pushes a switch 12 in a state where 8 is moved closer to the vertical rail 5 side in the retreating direction side.

Alternatively, the operating member 10 is provided on the connecting member 8 provided at the lower portion between the front and rear vertical bars 5 on the advancing direction side, and the lower connecting member 8 is moved closer to the vertical bar 5 on the retreating direction side. A safety device for an electric open / close type telescopic gate that is provided to push the switch 12 with.

Further, the operating member 10 and the switch 12 which is pushed by the operating member 10 and stops the drive of the drive device 3 are provided in the drive device 3, and the vertical bar 5 on the advancing direction side is the vertical bar 5 on the retreating direction side. Considering a safety device for an electrically-operated expandable telescopic gate that operates the switch 12 by pushing the operating member 10 by the connecting member 8 provided at the lower portion between the front and rear vertical rails 5 in the direction of travel, To be

Here, a specific example of the present invention will be described in detail with reference to FIGS.

In a gate having a door body 1 having a pantograph type opening / closing expansion mechanism mounted on a guide rail 2, the door body 1
A four-sided frame is provided so as to surround the drive device 3 at the end portion on the traveling side of. The four-sided frame on which the drive device 3 is installed is substantially the same as the many vertical bars 7 supporting the lattice of the door 1, and the four vertical bars 5 face each other in the advancing / retreating direction and the front-back direction orthogonal to the advancing / retreating direction. Further, the vertical bars 5 in the front-rear direction are connected to each other by a connecting member 8 and the vertical bars 5 in the advancing / retreating direction are connected by a diagonal member 9 or a link member. The drive device 3 is connected and fixed to the vertical rail 5.

In the above structure, the drive device 3 is provided with the switch 12 for stopping the driving, and the connecting member 8 provided at the lower portion between the front and rear vertical bars 5 on the advancing direction side is provided with the operating member 10 for hitting an obstacle or the like. A safety device for an electrically-operated expandable telescopic gate in which an operating member 10 pushes a switch 12 in a state where a lower connecting member 8 is brought into contact with and moves closer to the vertical rail 5 side in the retreating direction. Alternatively, the driving device 3 is provided with the actuating member 10 and the switch 12 that is pushed by the actuating member 10 to stop the driving of the driving device 3, and the vertical bar 5 on the advancing direction side comes into contact with an obstacle or the like and the vertical crosspiece 5 on the retreating direction side. A safety device for an electrically-operated expandable telescopic gate is conceivable in which a connecting member 8 provided in the lower part between the front and rear vertical rails 5 on the traveling direction side pushes the actuating member 10 while approaching the vertical rail 5. The diagonal members 9 or the link members may be connected by the frame structure of the link members only above the vertical bars 5 in the advancing / retreating direction.

As another embodiment, a four-sided frame may be considered in which a horizontal rail member is provided above the vertical rails 5 in the advancing / retracting direction to install the drive unit 3 connected thereto.

Further, another embodiment will be described with reference to FIG. At the front end of the door body 1 in the traveling direction, four vertical bars 5 are provided so as to face each other in the forward / backward direction of the door body 1 and in the front-back direction orthogonal to the forward / backward direction, and between the vertical bars 5 in the front-back direction,
A connecting member 8 is provided on the upper and lower sides, and a diagonal member 9 or a cross member is provided between the vertical rails 5 in the advancing and retreating direction, and it can be understood from the drawing that the diagonal member 9 or the cross member is connected to the vertical rail 5. As described above, the elastic member 14 is provided so as to widen the space between the vertical bars 5 in the advancing / retracting direction, thereby forming a four-sided frame having a slidable pantograph function. The connecting member 8 is fixed below the crosspiece 5, and a connecting member 8 is provided at a lower portion between the front and rear vertical crosspieces 5 on the traveling direction side, and an actuating member 10 for responding to a limit switch 12 for detecting an obstacle is provided substantially at the center of the connecting member 8. A safety device for an electrically-operated expandable telescopic gate with a fixed installation is conceivable.

As described above, since the elastic member 14 is provided at the connecting portion between the diagonal member 9 or the cross member and the vertical bar 5 so that the elastic member 14 is slidable and has the pantograph function, the obstacle is removed by the elastic action. Since it is possible to self-recover, the entire vertical bar at the tip end in the advancing / retreating direction enables detection of obstacles, so that the detection range is expanded.

A connecting member 8 is provided on the four-sided frame on which the drive unit 3 is installed so as to connect the lower portions between the front and rear vertical bars 5 at the front end in the advancing and retracting direction. An actuating member 10 that responds to a limit switch 12 that detects an obstacle, for example, is provided in the approximate center of the connecting member 8 in the vicinity or in a fixed manner. Therefore, when an obstacle hits the vertical bar 5 at the leading end in the forward / backward direction of the four-way frame in which the drive device 3 is installed, the limit switch 12 responds via the actuating member 10 to cut off the electric circuit of the drive device 3. To do.

Next, one specific example of the detector mounting means will be described in detail with reference to FIG. A limit switch actuating member 10 is fixed with a screw or the like at approximately the center of a connecting member 8 that connects the lower portion between the front and rear vertical bars 5 at the tip end in the advancing / retracting direction, with respect to the fixed side of the actuating member 10 of the limit switch 12. On the opposite side, a bracket or the like is provided on the drive unit base 13 so that the limit switch 12 can be turned on and off via an elastic member such as the limit spring 11.

Although the limit spring 11 is inserted and fixed to the actuating member 10 as shown in the figure, it can be variously modified as long as it has a function of returning the limit switch 12 to the normal state.

With the above-described structure, the door body 1 having the pantograph type expansion / contraction mechanism is mounted on the guide rail 2, and the door body 1 is driven by the drive device 3 and rotated in the forward and reverse directions. In an electric expansion / contraction gate having possible tow wheels 4, when an obstacle touches a vertical rail 5 of a four-sided frame in which a drive unit 3 provided at a front end portion of the door body 1 in the traveling direction is touched by an obstacle, the vertical rails before and after the vertical rail 5 are provided. The limit switch 12 is made to respond via the operating member 10 of the limit switch that is close to or fixed to the connecting member 8 that connects the lower part of the five, and the electric circuit of the drive device 3 is cut off to stop the drive. , It is possible to secure the intended purpose of safety.

Although the drive opening / closing type expandable gate has been described above, it can be applied to a sliding door type gate. Further, when the door body is low in straightness when moving like an expandable gate, a guide rail is required as in the above-mentioned embodiment, but when a certain degree of straightness can be secured like a sliding door type gate, a guide rail is required. No rail is needed. Further, the drive device can be provided not only at the moving side end but also at the central portion or other suitable positions in relation to other members.

In order to guide the external power source to the drive unit 3,
As can be understood from FIGS. 1 and 3, electric wire cords are spirally arranged on the grid rails or pin shafts.

Since the present invention is constructed as described above,
The entire vertical bar 5 at the front end in the advancing / retreating direction of the four-sided frame in which the drive device 3 for the door body 1 is installed serves as a contact sensing unit, and when the door body 1 is opened / closed by remote control, a person or a vehicle is brought near the door body 1. Alternatively,
If there is any other obstacle, it touches the vertical bar 5 at the tip, and the limit switch, which is an example of a detector, immediately responds to stop the drive device 3, which is extremely safe.

[0034]

As a result of adopting the above configuration, the present invention provides
The invention described in claims 1 to 5 can obtain the following effects. (1) Since the detection member is deleted and an obstacle is detected by the entire vertical rail at the tip in the forward / backward direction, the contact detection range is widened and safety is improved. (2) Since the contact sensing member has no protruding portion, there is no gap between the door post and the door body when the gate is fully closed. In addition to the above effects (1) and (2), the invention according to claim 4 can obtain the following effects. (3) Since the vertical rails that have substantially the same shape as the vertical rails and the lattice that form the door body are used as the contact sensing members, there is no discomfort in terms of external design. In addition to the effects (1) and (2), the invention according to claim 5 can obtain the following effects. (4) Since the vertical rail is made of an elastic material so as to bend, when the obstacle is removed, the normal state is immediately restored by the elastic force. In addition to the effects (1) to (4) described above, the inventions according to claims 6 to 8 can obtain the following effects. (5) Since it has a pantograph function that works to widen the vertical rails in the advancing / retreating direction, the entire vertical rails in the advancing direction are detected, so that the sensing range is widened and at the same time, the obstacles are eliminated and the normal state is immediately restored. To do. Further, the invention according to claim 9 can obtain the following effects. (6) Since the actuating member has the elastic member, the switch can always return to the normal state.

[Brief description of drawings]

FIG. 1 is an enlarged front view of a main part of the present invention.

FIG. 2 is an enlarged side view of a main part of the embodiment.

FIG. 3 is a schematic overall front view of the electric opening / closing type telescopic gate of the present invention.

FIG. 4 is a schematic front view showing a mounted state of the detector of the present invention.

FIG. 5 is a schematic front view of a four-sided frame having a pantograph function.

[Explanation of symbols]

1 ... door body 2 ... guide rail 3 ... drive device 4 ... towing wheel 5 ... vertical bar 6 ... detector 7 ... vertical door bar 8 ... connecting member 9 ... diagonal member 10 ...... Operating member 11 ...... Limit spring 12 ...... Limit switch 13 ...... Drive device base 14 ...... Elastic member

Claims (9)

[Claims] 1. A vertical bar is provided at the front end of the door in the advancing direction, facing each other in the forward / backward direction of the door and in the front-back direction orthogonal to the forward / backward direction. A switch that connects a connecting member and forms a four-sided frame by providing a connecting member between the vertical bars in the advancing / retracting direction to connect and fix the drive device to the front and rear vertical bars on the retreating direction side and stop the drive to the drive device. If an obstacle comes into contact with the tip of the door between the switch and the connecting member provided in the lower part between the front and rear vertical bars on the advancing direction side, the lower connecting member moves to the vertical bar side on the retreating direction side. A safety device for an electrically-operated expandable telescopic gate, which is provided with an actuating member that pushes a switch in a state of moving closer. 2. The safety device for an electrically-operated expandable telescopic gate according to claim 1, wherein the actuating member is provided on a connecting member provided at a lower portion between front and rear vertical rails on the traveling direction side. 3. The safety device for an electrically-operated telescopic gate according to claim 1, wherein the actuating member is provided in the drive device. 4. The connecting member provided between the vertical rails in the advancing and retreating direction is an oblique member or a cross member.
The safety device for an electric opening / closing type telescopic gate according to claim 3. 5. The front and rear vertical rails on the advancing direction side approach the vertical rails on the retreating direction side by bending downward, as set forth in claim 1. Safety device for electric open / close telescopic gate. 6. The longitudinal direction of the door body is provided with four vertical rails facing each other in the forward / backward direction and the front-back direction orthogonal to the forward / backward direction of the door body. A connecting member is provided, and a diagonal member or a cross member is provided between the vertical bars in the advancing / retracting direction. A member is provided to form a four-sided frame having a slidable pantograph function, the drive device is connected and fixed to the front and rear vertical rails on the backward direction side, and the drive device is provided with a switch for stopping the drive.
When an obstacle comes into contact with the front end of the door between the switch and the connecting member provided in the lower portion between the front and rear vertical bars on the traveling direction side, the lower connecting member moves closer to the vertical bar on the retreating direction side. A safety device for an electrically-operated expandable telescopic gate, which is provided with an actuating member for pushing the switch in the state. 7. The safety device for an electrically-operated expandable telescopic gate according to claim 6, wherein the actuating member is provided on a connecting member provided at a lower portion between front and rear vertical rails on the traveling direction side. 8. The safety device for an electrically-operated expandable telescopic gate according to claim 6, wherein the actuating member is provided in the drive device. 9. The electric opening / closing type according to claim 1, further comprising an elastic member for urging the switch pushing portion of the actuating member in a direction away from the switch. Telescopic gate safety device.