JP2519274Y2 - Overhead door opener - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overhead door opening / closing machine, and more particularly to an opening / closing machine having improved durability and safety.

[0002]

2. Description of the Related Art In a trolley type overhead door opening / closing machine, a motor is rotated in the normal or reverse direction, decelerated and transmitted to a chain sprocket to drive a roller chain, and reciprocates a trolley connected to the roller chain. A method of opening and closing a door such as a shutter curtain by traveling is widely adopted.

In such a type of opening / closing machine, when the door is opened / closed, even if there is an obstacle on the track and the opening / closing operation of the door is obstructed, the electric motor tries to continue rotating as it is. Not only the damaged parts, but also the door and opening / closing mechanism were damaged, and there was a problem in terms of durability and safety.

Therefore, in the conventional overhead door opening / closing machine, a friction plate is interposed in the driving force transmission system between the electric motor and the driving sprocket of the roller chain to limit the driving force, or a small generator or the like is further connected thereto. However, a method is adopted in which the operation of the electric motor is stopped or reversed by detecting that the friction plate is slipping.

[0005]

However, in the conventional friction transmission control system, due to its structure, the torque at the start of cutting the friction plate can only be set to be the same when the door is opened and when the door is closed. And in the case of overhead doors with different closing forces, there was no choice but to set it toward that higher force. As a result, even if the opening or closing operation of the smaller force is obstructed, the driving force is limited, the electric motor cannot be stopped and reversed, and there are still problems in terms of durability and safety.

[0006] In view of the above, the present invention provides an overhead door opening / closing machine capable of surely detecting whether the operation of opening or closing is obstructed in an overhead door of a type having different opening force and closing force. The challenge is to provide.

[0007]

Therefore, in the overhead door opening / closing machine according to the present invention, the trolley running member is driven by the driving force of the electric motor to reciprocate the trolley along the ceiling to open and close the overhead door. In an electric switch, an intermediate shaft rotatably supported by a mounting base and rotated or reversed by the motor, an operating plate rotatably attached to the intermediate shaft, and the intermediate shaft rotatably attached to the operating plate. When the trolley traveling member is driven by being rotated or reversely rotated by the intermediate shaft while the rotation or reverse rotation is obstructed, the intermediate shaft is rotated by the rotational force or the reverse rotation force of the intermediate shaft.
A rotation driving member that is rotated around the center of the mounting base; and first and second positioning members that are provided on the mounting base via a spring member to bias the operating plate to a first position for positioning.
By the rotational movement of the rotary drive member, the operating plate is rotated from the intermediate first position to the second position on one side or the third position on the other side against the biasing force of the first and second positioning members. The gist is that a switch means for detecting the fact is provided.

The trolley traveling member may be any member that can reciprocate in the trolley, and a roller chain is mostly used, but of course, other members such as a wire may be used. When using a roller chain, a sprocket can be used as the rotation driving member. If a wire is used, a winding drum or the like may be adopted.
The first and second positioning members are preferably configured so that the urging force of the spring members can be adjusted using, for example, bolts and spring seats.

[0009]

When the electric motor is rotated or reversely rotated, its driving force is transmitted to the rotary driving member via the intermediate shaft, the trolley traveling member is driven, and the trolley reciprocates along the ceiling to open or close the door. It When there is no obstacle on the track of the door, the operating plate is biased to the first position and positioned by the first and second positioning members.

If there is an obstacle on the track of the door that obstructs its operation, the trolley traveling member cannot travel and the rotation or reverse rotation of the rotary drive member is obstructed. Then, the rotation driving member is centered on the intermediate shaft by the driving force of the intermediate shaft.
The operating plate is rotationally moved and moves from the first position to the third position or from the first position to the second position against the biasing force of the spring member of the first or second positioning member, and the switch means detects it. The presence of obstacles is detected.

Therefore, even in the case of an overhead door having different opening force and closing force, the desired resistance of the door can be obtained by setting the spring members of the first and second positioning members to the biasing force corresponding to the opening force or the closing force. Force can be detected.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to specific examples shown in the accompanying drawings. 1 to 4 show an overhead door opening / closing machine according to an embodiment of the present invention. In FIG.
A trolley rail TR is arranged in parallel with the ceiling R, a trolley T is movably supported on the trolley rail TR, and a rear end of a shutter curtain (overhead door) D is attached to the trolley T by a trolley arm TA. It is connected.

A switch 1 is provided at one end of the trolley rail TR.
Is provided, a chain guide CG is attached to the other end of the trolley rail TR, and a roller chain (trolley traveling member) C is stretched endlessly between the switch 1 and the chain guide CG. The trolley T is connected to the roller chain C, and the trolley T reciprocates along the ceiling when the roller chain C is driven by the opening / closing device 1, and the shutter curtain D is stored along the ceiling R. It is designed to be opened and closed between a stored state and a closed state in which the doorway is closed.

The switchgear 1 has the following structure. That is, in FIGS. 2 and 3, the mounting base 10 is fixed to the rear end side of the trolley rail TR, and the electric motor 11 is mounted to the rear end side of the mounting base 10 with the rotating shaft 110 extending downward. A chain sprocket 111 is fitted on the rotating shaft 110 and is fixed by a knock pin.

An intermediate shaft 12 is rotatably mounted on the mounting base 10 by a bearing 120 offset from the rotary shaft 110 on the side of the electric motor 10. A large-diameter sprocket 121 is externally fitted to the lower end of the intermediate shaft 12 and is locked by fitting a key and a key groove. The large-diameter sprocket 121 and the electric motor rotating shaft 110 are connected by a transmission belt 112. The intermediate shaft 12 is rotated or reversed by the electric motor 11.

An intermediate gear 122 is fixed to the upper part of the intermediate shaft 12, and an operating plate 13 is rotatably attached to the upper end by a bearing 130. A drive sprocket (rotational drive member) 14 and an idler sprocket 15 are arranged in the width direction at the front portion of the operating plate 13 to form a bearing 14
0 (however, the bearing of the idler sprocket 15 is not shown), and the roller chain C is endlessly stretched between the sprocket 14, 15 and the chain guide CG. A trolley T is connected in the middle of the shaft, and a drive gear 141 is externally fitted to the rotary shaft of the drive sprocket 14 and is locked by fitting a key and a key groove. The drive gear 141 is meshed with the intermediate gear 122. ing.

A front end portion of the operating plate 13 is bent downward in a substantially L shape, and a central portion thereof is punched out into a substantially square shape to form a hook receiver 131. On the other hand, the adjustment bolts 160 and 170 are inserted into the upstanding walls on both sides of the mounting base 10, and the hook arm 1 is inserted into the insertion portions of the adjustment bolts 160 and 170.
The rear end bent portions 61 and 171 of the hook arm 1 are slidably mounted, and the spring seats 162 and 172 are screwed so as to be able to move forward and backward to be fixed to the mounting base 10.
Spring members 163 and 173 are contracted between the rear end bent portions 61 and 171 and the spring seats 162 and 172, and the front end hook portions 164 and 174 of the hook arms 161 and 171 are hooks of the operating plate 13. The first and second positioning members 1 are hooked and locked by the receiver 131, and thus bias the operating plate 13 to the first position (see the solid line a in FIG. 4) for positioning.
6 and 17 are configured.

The operation projection 13 is provided at the front end of the operating plate 13.
2 is formed, and the detection switch (switch means) 18 is attached to the attachment base 10 in front of the operation protrusion 132.
The operation piece 180 of the detection switch 18 is pressed by the operation protrusion 132 of the actuation plate 13 located at the first position a, the normally-closed contact 181 is turned off, and the actuation plate 13 is moved to the second position on one side of the first position a. When rotated to the position (see the chain double-dashed line b in FIG. 4) or the third position on the other side (see the dotted line c in FIG. 4), the pressing of the operation piece 180 of the detection switch 18 is released, and the normally closed contact 181 is released. Is turned on.

Next, the operation will be described. When there is no obstacle on the track of the shutter curtain D in the normal state, the operating plate 13 pulls the hook arms 161 and 171 of the first and second positioning members 16 and 17 outward by the biasing force of the spring members 163 and 173. And is positioned at the first position a. When the electric motor 11 is rotated or rotated in the reverse direction, the rotational force or the reverse force is transmitted to the transmission belt 111, the large diameter sprocket 121, the intermediate shaft 12, the intermediate gear 122, and the drive gear 14.
1 is transmitted to the drive sprocket 14 and the drive sprocket 14 is rotated or reversely rotated so that the roller chain C
Is pushed and pulled, the trolley T travels back and forth along the trolley guide TR, and the shutter curtain D is opened and closed.

[0020] On the other hand, if there is an obstacle on the trajectory of the shutter curtain D, the travel of the trolley T is inhibited, trolley
The drive sprocket 14 connected by T and the roller chain C has a resistance force against its rotation or reverse rotation. Then, the drive gear 141 interlocked with the drive sprocket 14 while that will be limiting the rotation at that position, drive
Dynamic sprocket 14, drive gear 141 and idler sprockets
The working plate 13 supporting the rocket 15 is around the intermediate shaft 12.
It is freely rotatable and has a drive sprocket 14
And the idler sprocket 15 has a roller chain C
The drive gear 141 is driven by the rotational force or the reverse rotation force of the intermediate gear 122 because the intermediate gear 12 is simply bridged.
The center axis of the drive gear 141 and the intermediate shaft 12
Rotational movement with a radius corresponding to the distance from the central axis
To start. Operated by the rotational movement of this drive gear 141
The plate 13 rotates about the intermediate shaft 12, and the actuating plate 13 moves to the second
Or the spring member 173 of the first positioning member 17, 16;
It rotates from the first position a to the second position b or from the first position a to the third position c against the biasing force of 163, and the detection switch 18
Is turned on, and it is detected that the operation of the shutter curtain D is abnormal.

For example, when the intermediate shaft 12 rotates in the direction of arrow E in FIG. 4 and the drive gear 141 is driven in the direction of arrow F in FIG. 4, when the traveling of the trolley T is blocked by an obstacle, the drive gear is rotation of the F direction 141 is prevented, ejection
The dynamic gear 141 rotates around the intermediate shaft 12 in the same direction as the intermediate shaft 12 to rotate the operating plate 13 in the direction of arrow G in the figure, and when the operating plate 13 reaches the second position b, the detection switch 18 The operation piece 180 is removed from the operation protrusion 132, and the normally-closed contact 181 of the detection switch 18 is turned on. The same applies when the intermediate shaft 12 is rotating in the opposite direction.

Therefore, the spring member 16 of the first and second positioning members 16 and 17 is opened and closed while the shutter curtain D is opened and closed.
When a resistance equal to or greater than the value corresponding to the urging force of 3, 173 is received, it can be detected by the detection switch 18 and a signal can be taken out, the electric motor 11 is stopped using the detection signal, and then reverse rotation is performed. Therefore, not only the obstacle on the track of the shutter curtain D but also the damage of the shutter curtain D and the switch 1 can be prevented.

Further, the first and second positioning members 16, 1
When the adjusting bolts 160 and 170 of FIG. 7 are rotated, the spring seats 162 and 172 move forward and backward, the spring members 163 and 173 expand and contract, and the urging force is adjusted. The torque at the start of rotation of 13 can be set to a value according to the opening force or the closing force.

[0024]

As described above, according to the overhead door opening / closing device of the present invention, even if the opening and closing operations of the overhead door are blocked by different resistances,
The operating plate operates reliably and can be detected reliably, and the durability and safety can be greatly improved.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an overhead door opening / closing device according to an embodiment of the present invention.

FIG. 2 is a plan view showing the overhead door opening / closing device.

FIG. 3 is a side view showing a configuration of the overhead door opening / closing machine.

FIG. 4 is a diagram for explaining an operation of the overhead door opening / closing machine.

[Explanation of symbols]

1 Switchgear 10 Mounting Base 11 Electric Motor 12 Intermediate Shaft 13 Working Plate 14 Drive Sprocket (Rotation Drive Member) 16, 17 First and Second Positioning Members 163, 173 Spring Member 18 Detection Switch C Roller Chain (Trolley Traveling Member) D Shutter curtain (overhead door) T trolley

Claims (2)

(57) [Scope of utility model registration request] 1. An electric opening / closing machine in which a trolley traveling member is driven by a driving force of an electric motor to reciprocate the trolley along a ceiling to open and close an overhead door, and the electric motor is rotatably supported by a mounting base. An intermediate shaft rotated or rotated by the intermediate shaft, an operating plate rotatably attached to the intermediate shaft, and a rotary plate attached to the operating plate and rotated or rotated by the intermediate shaft to drive the trolley traveling member. ,
When the rotation or the reverse rotation is obstructed, a rotation drive member that is rotated around the intermediate shaft by the rotational force or the reverse rotation force of the intermediate shaft ; First and second positioning members for urging and positioning to one position, and a second position on one side or a third position on the other side from the intermediate first position by the rotational movement of the rotary drive member. An overhead door opening / closing machine, further comprising: switch means for detecting that the first and second positioning members are rotated against the biasing force of the first and second positioning members. 2. The overhead door opening / closing machine according to claim 1, wherein the first and second positioning members are configured so that the biasing force of the spring members can be adjusted.