JPH0617571A - Driving device for large-sized sliding door - Google Patents

Abstract

PURPOSE:To put a driving device compactly in the inside of a sliding door which is less in thickness, and to make the sliding door slide safely and smoothly by a method wherein driving wheels are driven by operation of an oil- hydraulic motor that is actuated by an air motor. CONSTITUTION:As an air valve 16 is opened, compressed air stored in an air tank 10 is sent to an air cylinder 5, and a driving wheel 3 is pushed down, resisting the drawing force of a coil spring, and is brought into contact with a rail 13 and thereby the wheel becomes capable of travelling. At the same time, an air motor 9 is actuated by the compressed air, making an oil-hydraulic pump 7 start, and thereby pressure oil is sent from an oil tank 8 to an oil- hydraulic motor 4. Then, the oil-hydraulic motor 4works and transmits power to the driving wheel 3, making a sliding door 1 slide over the rail 13. Direction of sliding of the sliding door 1 can be changed optionally either to forward motion or rearward motion by operation of a selector lever 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive device for a large sliding door, which is mainly used as a drive device for a door installed at an entrance of a hangar such as a truck terminal or an airplane.

[0002]

2. Description of the Related Art Generally, large doors (hereinafter referred to as "sliding doors") are installed at entrances and exits of hangars such as truck terminals and airplanes.

This type of sliding door is generally large in size, and it is difficult to open and close it manually. Therefore, some sliding doors are automatically opened and closed by the power of an electric motor or the like, but generally, in order to reduce the cost of equipment, a drive device is used. Many types do not have it and can be opened and closed manually.

For this reason, it is manufactured as thin and lightweight as possible so that it can be opened and closed as easily as possible.

However, for sliding doors that are frequently opened and closed, there is a strong demand from the parties concerned to make them power-operated, and recently, many power-operated sliding doors using electric motors have been manufactured. Is coming.

[0006]

However, since this type of sliding door is manufactured to be extremely thin for its size,
It was extremely difficult to install the drive device compactly in a very narrow space inside the sliding door.

[0007] In addition, since a considerable number of sliding doors are required at the entrance and exit of a hangar or the like of an airplane with a very large frontage, if the sliding door becomes thicker by installing a drive device, the thickness of the entire sliding door becomes considerably thick. And as a result,
There was also the problem that the sliding door could occupy a fairly large floor space.

Further, when an electric motor is used as a power source, a method of continuously supplying electric power to a moving sliding door is very troublesome and expensive.

Further, in a sliding door of a building in which a flammable material such as a fuel storage or an airplane hangar is stored, there is a risk that a spark may be generated and the fuel may ignite.

The present invention has been proposed in order to solve the above-mentioned conventional problems, and allows a large sliding door to travel extremely smoothly and safely, and
An object of the present invention is to provide a drive device for a large sliding door that can be stored extremely compactly in an extremely thin sliding door.

[0011]

A drive device for a large sliding door according to the present invention comprises a drive wheel, an air cylinder for raising and lowering the drive wheel, a spring for pulling the drive wheel toward a lower frame, and an air motor for rotation. The above-mentioned object can be achieved by comprising a hydraulic pump that operates, a hydraulic motor that sends pressure oil by the hydraulic pump to transmit power to the drive wheels, and an air tank that stores compressed air that is sent to the air cylinder and the air motor. It is a thing.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a longitudinal sectional view of a sliding door showing a structure of a sliding door driving device according to the present invention, FIG. 2 is a detailed view thereof, FIG. 3 is an enlarged view of a driving portion, and FIG. 4 is a front view of an oil tank. 5 is a plan view thereof, and FIG. 6 is a side view thereof.

In the figure, reference numeral 1 is a sliding door, and 2, 2 are sliding doors 1.
Door wheels, 2a, 2a are sliding wheels, 3 is a drive wheel of the sliding door 1, 4 is a hydraulic motor for transmitting power to the drive wheel 3, and 5 is a drive wheel 4.
, 6 is a mechanical hydraulic switching valve, 6 is a hydraulic pump for sending pressure oil to the hydraulic motor 4 and the mechanical hydraulic switching valve 6, 8 is an oil tank for storing pressure oil, and 9 is a hydraulic pump 7. An air motor for turning on and an air tank 10 for storing compressed air to be supplied to the air cylinder 5 and the air motor 9.

The sliding door 1 is made of iron frame material such as H-shaped steel or channel steel, and is made as thin as possible by attaching steel plates or the like to both sides of the shaft assembly. , 2 are attached to the lower frame 1a of the sliding door 1, and the sheaves 2a, 2a are attached to the upper frame 1b so as to rotate along a guide rail (not shown) about the vertical axis.

The drive wheel 3 is provided with a hydraulic motor 4 and a speed reducer (not shown), and is mounted below the lower frame 1a between the door rollers of the door wheels 2 on the door end side or the door tail side. Further, one end of the drive wheel 3 is rotatably attached to the lower frame 1a by a mounting pin 11, and the other end is supported by the lower frame 1a by an air cylinder 5 whose cylinder rod extends and contracts in the vertical direction.

A coil spring 12 is mounted between the lower frame 1a and the drive wheel 3 in the vicinity of the air cylinder 5, and the drive wheel 3 is always pulled toward the lower frame 1a by the coil spring 12. It is far from 13.
Therefore, when compressed air is not sent to the air cylinder 5, the sliding door 1 has a structure that can be freely opened and closed by human power.

The mechanical hydraulic switching valve 6 is attached to each of the front and rear ends of the lower frame 1a. A cam operation switching valve 6a is attached to the mechanical hydraulic switching valve 6 and when the cam switching valve 6a hits a block 14 mounted near the end of the rail 13, the sliding door 1 during traveling is in a fully closed state or a fully opened state. It is structured so that it can be operated when approaching.

Both the hydraulic pump 7 and the air motor 9 are mounted on the lower side of the lower frame 1a, and the oil tank 8 and the air tank 10 are mounted on the lower frame 1a.

A plurality of air tanks 10 are installed in a very limited space in the sliding door 1 so that they can be stored as compactly as possible. Also, the air tank
An air supply port 10a is attached to 10 and this supply port 10a
More compressed air can be supplied periodically by a compressor.

The capacity of the air tank 10 is determined in consideration of the size and weight of the sliding door 1, the running resistance determined by the weight of the sliding door 1 and the rolling resistance of the door roller 2 and the drive wheels 3, the running distance and the opening / closing frequency. Has been.

An air pipe 15 for sending compressed air from an air tank 10 to the air cylinder 5 and the air motor 9.
Are connected to each other, and an air valve 16 is attached to the air pipe 15. The air valve 16 is installed inside the sliding door 1 on the door end side or the tail end side of the sliding door 1.
The compressed air can be simultaneously sent to the air cylinder 5 and the air motor 9 by operating the.

Further, the hydraulic motor 4 and the mechanical hydraulic switching valve 6 are provided with an oil feed pipe 17 for feeding pressure oil from an oil tank 8.
And a switching lever 18 for switching the flow of the pressure oil flowing through the oil feed pipe 17 is attached to the oil tank 8.

In such a structure, when the air valve 16 is opened and compressed air is fed to the air cylinder 5 and the air motor 9, the cylinder rod of the air cylinder 5 extends, and the cylinder rod causes the driving wheel 3 to pull the coil spring 12 toward each other. Pushed down against rail 13
You can run by touching.

At the same time, the air motor 9 operates and the hydraulic pump 7 operates. When the hydraulic pump 7 operates, pressure oil is sent from the oil tank 8 to the hydraulic motor 4 and the mechanical hydraulic switching valve 6, and the hydraulic motor 4 operates to transmit power to the drive wheels 3. As a result, the sliding door 1 runs on the rail 13. At this time, if the switching lever 18 is set to the forward side or the backward side, the sliding door 1 moves forward or backward.

When the sliding door 1 approaches the fully closed state or the fully opened state, the cam switching valve 6a of the mechanical hydraulic switching valve 6 is closed.
When the block hits the block, the flow of the pressure oil flowing in the mechanical hydraulic switching valve 6 is blocked, and the flow rate of the pressure oil flowing to the hydraulic motor 4 is reduced, so that the traveling speed of the sliding door 1 is reduced.
Then, a stopper (not shown) attached to the upper end of the sliding door 1 hits the frame, and the sliding door 1 stops safely.

Further, if the switching lever 18 is set to the stop position, the flow of the pressure oil is stopped, and the sliding door 1 maintains the stopped state.

[0027]

Since the present invention is constructed as described above, it has the following effects.

Since the drive device is composed of a hydraulic motor that transmits power to the drive wheels, a hydraulic pump that sends pressure oil to the hydraulic motor, and an air motor that operates the hydraulic pump, even an extremely small device can be large. The sliding door can be opened and closed, so that the sliding door can be manufactured as thin as possible.

Further, since the sliding door can be made thin,
Even if the number of sliding doors increases, the total thickness of the sliding doors does not increase relative to the number of sliding doors, and therefore the loss of the floor area occupied by the sliding doors can be minimized.

Since no part for generating sparks is provided, it can be installed in a storage room for storing combustible materials such as fuel or a sliding door of the storage room with a sense of security.

Since compressed air is used as a power source instead of a power source, it is extremely economical. Also, since this compressed air is stored in the air tank inside the sliding door, as long as the compressed air is stored in the air tank, it is not necessary to continue supplying the compressed air from the outside, so problems such as the power supply system Nor.

Since the drive wheel is normally pulled to the lower frame side of the sliding door by the coil spring and separated from the rail, it can be easily opened and closed by hand.

By using the hydraulic motor, speed control can be easily performed, and therefore traveling can be performed extremely safely.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a sliding door showing a structure of a sliding door driving device according to the present invention.

FIG. 2 is a detailed view of a drive device for the sliding door shown in FIG.

FIG. 3 is an enlarged view of a drive unit of the drive device for the sliding door shown in FIG.

FIG. 4 is a front view of an oil tank.

5 is a plan view of the oil tank shown in FIG. 4. FIG.

6 is a side view of the oil tank shown in FIG. 4. FIG.

FIG. 7 is a circuit diagram showing flows of compressed air and pressure oil.

FIG. 8 is a circuit diagram showing the flow of compressed air and pressure oil.

[Explanation of symbols]

1 ... Sliding door, 2 ... Door car, 2a ... Sliding wheel, 3 ... Drive wheel, 4 ... Hydraulic motor, 5 ... Air cylinder, 6 ... Mechanical hydraulic switching valve, 7 ... Hydraulic pump, 8 ... Oil tank, 9 ... Air motor , 10 ... Air tank, 11 ... Mounting pin, 12 ... Coil spring, 13 ... Rail, 14 ... Block, 15 ... Air pipe, 16 ... Air valve, 17 ... Oil supply pipe, 18 ... Switching lever.

Claims (1)

[Claims] 1. A large sliding door drive device comprising: a drive wheel, an air cylinder for raising and lowering the drive wheel, a spring for pulling the drive wheel toward a lower frame, a hydraulic pump rotated by an air motor, and the hydraulic pump. A drive device for a large sliding door, comprising: a hydraulic motor that sends pressure oil to transmit power to the drive wheels; and an air tank that stores compressed air to be sent to the air cylinder and the air motor.