JPH0248627Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an emergency stop device for automatic doors such as automatic opening/closing doors, shutters, oversliders, etc. that are installed in openings.

[Problems to be solved by the prior art and the invention]

Generally, some automatic doors of this type are configured to automatically open and close an opening by transmitting power from an electric motor through a transmission means such as an endless body such as a chain or a level. However, in these cases, when the door body hits an obstacle such as luggage or a person while the door body is lowering, it is necessary to make an emergency stop of the door body lowering. Conventionally, as a method for making such an emergency stop, when the door body hits an obstacle,
The drive motor is stopped by detecting bending of the door body itself (as seen in shutters) or bulges due to slack in the transmission chain stretched between the door body and the winding shaft. be. However, when these items come in contact with an impact object, the bulge direction is not always toward the detector, and they may bulge to the opposite side, so various considerations must be taken to prevent them from bulging to the opposite side. Not only does this have the disadvantage of making the structure complicated, but in the case of things like panel doors, there is a risk that the position of the panels may be unknown, which has caused problems such as poor reliability. Ta.

[Means to solve the problem]

In view of the above-mentioned circumstances, the present invention was devised for the purpose of providing an emergency stop device for automatic doors that can eliminate these drawbacks. between the winding shaft interlockingly connected to the door body and the swingable tension member biased by the bullet,
The endless body is suspended so that the tension member is swung to the tension side that resists the bullet as the door body during the descent comes into contact with an obstacle and the winding shaft stops rotating.
The door body is configured to automatically open and close by forward and reverse rotation of the take-up shaft as the electric motor is driven, and the tension member includes a tension member that is generated when the door body comes into contact with an obstacle. The electric motor is characterized by being provided with a detection means that detects the swinging displacement of the electric motor and makes an emergency stop of the electric motor.

With this configuration, the present invention can be used while descending.
Although it has a simple structure, it reliably detects when the door body hits an obstacle and makes it possible to perform an emergency stop of the electric motor with extremely high reliability. .

〔Example〕

Next, one embodiment of the present invention will be described based on the drawings. In the drawings, 1 is a panel shutter installed in an opening of a building, and a plurality of panel bodies 2 making up the panel shutter 1 are:
A connecting chain 4 is pivotally connected in a series at a predetermined interval to a support shaft 3a of a guide roller 3 which is protruded from the upper side of both left and right edges. The guide roller 3 and both ends of the panel body 2 are guided by guide rails 5 provided on the left and right sides of the opening, so that they move up and down. The connecting chain 4 is meshed with a take-up sprocket 7 disposed inside the tar case 6. Furthermore, the shutter case 6 is equipped with a storage rail 8 which is appropriately inclined so that one end faces the upper side of the winding sprocket 7 and the other end is lower than the one end. Then, as will be described later, by the chain winding operation of the winding sprocket 7, the guide roller 3 of the panel body 2 that has been raised on the guide rail 5 is moved to the upper storage rail 8 side and placed on the storage rail 8. The panel body 2 with the guide roller 3 conveyed onto the storage rail 8 in this way rolls toward the other end of the storage rail 8 due to the weight of the panel body 2 and rolls sideways. The shutters are moved and sequentially stored in parallel in the shutter case 6.

A driven sprocket 11 is further fixed to the winding shaft 10 of the winding sprocket 7, and an endless sprocket is connected between the driven sprocket 11 and a drive sprocket 12a mounted on the drive shaft 12, as will be described later. A transmission chain 13, which is an example of a body, is suspended. Furthermore, the drive shaft 12
sprocket 12b and electric motor 14 mounted on the
It is interlocked and connected to the electric motor 14 via a drive chain 15 suspended between the sprocket 14a and the sprocket 14a on the side. When the electric motor 14 is driven, the drive shaft 12 rotates, and in response, the take-up shaft 10 also rotates to open and close the panel shutter 1.

By the way, the lower side of the transmission chain 13 has a relaxed shape, and a tension sprocket 17, which is configured to be vertically swingable via a support shaft 16, is engaged therewith, and the lower side of the transmission chain 13 has a relaxed shape. It is designed to tension the transmission chain 13 that is connected to the shaft, and constitutes the tensioning member of the present invention. here,
18 is a tension bullet, and 18a is a tension arm. Then, as mentioned above, the electric motor 1
4, the drive shaft 12 rotates in the direction of arrow A so that the transmission chain 13 is wound up from the upper side and sent out to the lower side, that is, when it is rotated in the direction of arrow A, the drive shaft 12 rotates the winding shaft 10 toward the chain winding side and the panel. The shutter 1 is wound to the open side. One drive shaft 1
2 in the opposite direction, that is, in the direction of winding up the transmission chain from the lower side and feeding it out to the upper side (in the direction of arrow B), the winding shaft 10 is rotated to the chain unwinding side, and this This causes the panel shutter 1 to move downward and close the opening.

19 is a detection switch, and the detection switch 19 is provided opposite to the tension arm 18a. Then, as mentioned above, panel shutter 1
During the lowering of the panel shutter 1, if an obstacle impedes the lowering of the panel shutter 1 and the rotation of the take-up shaft 10 is stopped, the transmission chain 13 is sent to the upper side by the drive of the electric motor 14. As a result, the tension sprocket 17 is oscillated toward the tension side against the ammunition 18, but at this time, the tension arm 18a contacts the detection switch 19 and opens, causing the electric motor to move. 14 is stopped.

In the embodiment of the present invention configured as described above, the opening and closing of the opening is automatically performed by forward and reverse rotation of the winding shaft 10 as the electric motor 14 is driven. However, when the panel shutter 1 comes into contact with an obstacle while it is descending, and the panel shutter 1 comes into contact with it and stops descending, the rotation of the winding shaft 10 also stops. However, since the electric motor 14 is being driven, the transmission chain 13 moves along the arrow B of the drive sprocket 12a.
As a result, the tension sprocket 17 on the lower side is oscillated toward the tension side that resists the bullet 18, that is, the direction of arrow C. As a result, the detection switch 1
9 contacts the tension arm 18a and opens,
The electric motor 14 immediately stops to perform an emergency stop in lowering the panel shutter 1.

As described above, in the present invention, the emergency stop of the panel shutter 1 is not performed by detecting the bulge caused by bending of the chain as in the conventional case, but by using a tension sprocket that tensions the transmission chain 13. Since the swinging displacement of the nut 17 toward the tension side is directly detected, the structure is not only extremely simple, but also the reliability of detection is greatly improved.

It goes without saying that the present invention is not limited to the above-mentioned embodiments, but it goes without saying that it can be used in commonly known automatic doors such as oversliders and shutters rather than panel shutters.

[Effect]

In summary, since the present invention is constructed as described above, if the door body stops descending due to the presence of an obstacle while the door body is descending, the take-up shaft is stopped and the drive shaft remains as it is. When the endless body is driven and the tensioning member is swung to the tension side, the detection means detects this and the electric motor is brought to an emergency stop. There is no need to install a separate member to prevent it from going to the opposite side, and although the structure is simple, it can perform accurate, quick, and highly reliable detection, greatly improving safety. It is.

[Brief explanation of the drawing]

The drawings show an embodiment of an emergency stop device for an automatic door according to the present invention, in which Fig. 1 is a schematic perspective view of a panel shutter, Fig. 2 is an inner side view of the case part, and Fig. 3 is a schematic perspective view of a panel shutter. The figure is a diagram of the transmission mechanism, and Figures X and Y are a front view and a plan view of the tension member. In the figure, 1 is a panel shutter, 2 is a panel body,
3 is a guide roller, 4 is a connecting chain, 5 is a guide rail, 6 is a shutter case, 7 is a winding sprocket, 8 is a storage rail, 10 is a winding shaft, 11 is a driven sprocket, 12 is a drive shaft, 13 is A transmission chain, 14 is an electric motor, 15 is a transmission chain, 1
6 is the support shaft, 17 is the tension sprocket, 18
is a bullet, and 19 is a detection switch.

Claims (1)

[Scope of utility model registration request] The lowering door body is held between a drive shaft that is interlocked and connected to the electric motor side, a take-up shaft that is interlocked and connected to the door body, and a swingable tension member that is biased by a bullet. When the winding shaft comes into contact with an obstacle and stops rotating, the endless body is suspended so that the tension member is swung to the tension side that resists the bullet, and the winding is performed when the electric motor is driven. The door body is configured to automatically open and close by forward and reverse rotation of the shaft, and the tension member is configured to detect the swinging displacement of the tension member caused by the contact of the door body with an obstacle. 1. An emergency stop device for an automatic door, characterized in that a detecting means for making an emergency stop of an electric motor is provided.