JPH0333918Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The disclosed technology belongs to the technical field of sliding door structures for warehouses and the like that store parts, materials, etc. in buildings such as factories.

<Summary of the gist> This idea is based on a device that converts circular motion into linear motion linked to a drive device at the opening of a warehouse, etc. that stores materials and parts installed in a factory. This invention relates to a door opening/closing device that slides to open and close along an attached rail, and in particular, a crank wheel of a device for converting circular motion into linear motion is provided on the frame through a gear to the motor, and the crank wheel is engaged with the motor. This invention relates to a door opening/closing device in which a wheel rotates a sprocket via a rack, and the sprocket opens and closes a door via a chain.

<Prior Art> As is well known, a plurality of openings 2 are formed in a warehouse 1 or the like installed in a factory as shown in FIGS. It is installed inside.

In the door opening/closing device 3, the door 7, which is slidably attached to rails 5 and 6 extending above and below the frame 4, is opened by operating a motor 8 such as a pulse motor. A cushion rubber 11 as a stopper is attached to the chain 10 between the rotating sprockets 9 and 9' and attached to the lower part of the door 7, and the shock is absorbed by the stopper 12 formed on the side of the opening 2. The door 7 closes the opening 2.

<Problem to be solved by the invention> However, in the conventional door opening/closing device 3 described above, when the motor 8 is operated and the door 7 is slid to close, the vertical axis in FIG. As shown by the dashed line graph _C1 , with time T, door 7
Since the movement is uniform, the initial speed is maintained until just before it stops, and although some of the impact is absorbed through the cushion rubber 11, the door 7 opens due to the reaction of the collision with the locking body 12. There were flaws.

Further, since the impact when closing the door 7 is large, there is a disadvantage in that it generates noise and vibration, and there is also a disadvantage in that extra power is required to close the door 7 that is not completely closed again.

To deal with this, for example, there is a device proposed in Japanese Utility Model Publication No. 53-4606, but since the door is connected to the crank wheel via a linear link, the door and the link are integrated. Since the door is a rigid body, the inertial force is large when the door is closed or opened, creating a disadvantage in that the drive mechanism such as the motor is strained.

<Purpose of the invention> The purpose of this invention is to solve the problem of closing doors in warehouses, etc. based on the above-mentioned conventional technology, and to
An excellent product that benefits the field of application of opening/closing technology in various industries by ensuring smooth and reliable movement at the end of the stroke when sliding a door, and in particular, ensuring quiet and reliable movement when closing the door. The purpose is to provide a door opening/closing device.

<Means/effects for solving the problem> The structure of this invention, whose gist is the scope of the above-mentioned utility model registration claim in accordance with the above-mentioned purpose, is to solve the above-mentioned problem, and to solve the above-mentioned problem. When opening and closing the opening by sliding the door along a rail attached to the frame of the opening by means of a drive device, a rotary drive device consisting of a motor, a crank wheel, and a rack connected thereto is activated on one side as appropriate. The door is opened and closed by expanding and contracting the distance between the door and the frame using a chain that engages with the sprocket, and the speed of movement of the door at the fully open and fully closed positions is changed from that at other positions. This technology takes technical measures to reduce the inertial force by reducing the damping speed to a lower value than the previous one.

<Example> Next, an example of this invention will be described below based on the drawings from FIG. 3 onwards. Furthermore, the second
Components that are the same as those in the drawings will be described using the same reference numerals.

In the embodiment shown in FIG. 4, a door opening/closing device 3', which constitutes the gist of this invention, is provided in an opening 2 of a warehouse 1, etc., as in the conventional embodiment shown in FIG.

Inside the opening 2, rails 5 and 6 are installed parallel to the frame 4 at predetermined positions above and below the opening 2, respectively.

A slide type door 7 is provided on the rails 5, 6 so as to be able to open and close with respect to the opening 2 via upper rollers 14, 14 and lower rollers 15, 15 supported by brackets 13, 13. There is.

Also, the frame 4 to which the upper rail 5 is attached
Sprockets 9, 9' are pivotally supported at a predetermined interval, and both lower ends of a chain 10, which is engaged and wound around the sprockets 9, 9', are fixed to brackets 13, 13 of the door 7. ing.

A gear 16 is coaxially and integrally provided on one side of the sprockets 9, 9'.
A rack 19 supported by rollers 18, 18 is engaged via a pinion 17.

The pinion 17 and rollers 18, 18 are supported by the frame 4 by appropriate arms and brackets.

Further, a crank wheel 20 having a predetermined outer diameter is pivotally supported on the frame 4, and bevel gears 21, 2
2 to the motor 8'.

A crank pin 23 attached to the peripheral surface of the crank wheel 20 and a pin 24 on the front side of the rack 19 are connected via a crank arm 25.

The crank wheel 20, crank pin 23, crank arm 25, and rack 19 constitute a circular motion linear motion converting device 26.

Further, a cushion rubber 11 is attached to the lower part of the door 7 on the side of the opening 2 via a bracket 27, and corresponds to a stopper 12 formed on the side of the opening 2 to prevent the door 7 from closing when the door 7 is closed. It is designed to absorb shock.

In the above configuration, as shown in FIG.
When motor 8' is started with is open,
The crank wheel 20 rotates in the direction of the arrow via the bevel gears 21 and 22, and the crank arm 25 thereby operates to pull the rack 19 closer together.

Therefore, as the rack 19 moves, the pinion 17 and gear 16 rotate, and the chain 10 that is wound around the sprockets 9 and 9' rotates, so that the door 7 is The opening 2 is closed by sliding on the rails 5 and 6.

By the way, since the crank pin 23 of the door 7 is set to the right side of the crank wheel 20 in the figure when the door 7 is in its open position, the speed when the door 7 slides is as shown by the solid line in FIG. 3. , a sinusoidal curve C ₂ is drawn, and therefore, when the door 7 reaches the closed state where the cushion rubber 11 comes into contact with the stopper 12, the speed becomes extremely slow, the opening 2 is quietly closed, and then reopened by the reaction of closing. Not at all.

Then, if the motor 8' is continuously rotated in the same direction without being reversely rotated, the door 7 is opened.

Therefore, when the door 7 is opened or closed, the inertia force acts only on the door 7 itself and does not act on the chain 10, which is relatively light. Therefore, the motor 8' is directly affected by the chain 10. The load due to inertial force is hardly applied, so the load does not become excessive, and the lifespan is extended accordingly.

Further, in the door opening/closing device 3' of the embodiment shown in FIG. 5, a slide guide 29 having a longitudinal groove 28 is integrally attached to the tip of the rack 19', and the crank pin 2 of the crank wheel 20 is inserted into the longitudinal groove 28.
3 is engaged, and the rack 19' is supported by the guide 30.

In this embodiment, the crank wheel 20
When the crank pin 23 rotates, the crank pin 23 moves vertically relative to the long groove 28 of the slide guide 29, and there is an advantage that the crank arm 25 of the above-described embodiment is not required.

Further, since the other configurations and operations are the same as those of the above-mentioned embodiment, the same reference numerals are given and explanations thereof will be omitted.

It goes without saying that the embodiments of this invention are not limited to the above-mentioned embodiments; for example, various embodiments can be adopted, such as attaching a crank wheel to the door side and fixing the crankshaft to the frame side.

<Effects of the invention> As mentioned above, according to this invention, basically in a sliding type door, the sliding speed of the door is reduced as the door approaches the fully closed state, so that the door can be closed extremely quietly. The door does not open again due to the reaction when it is closed, and an excellent effect is achieved in that noise can be suppressed.

Since the rotary drive device consisting of a motor and a circular-to-linear motion conversion device is installed either on the frame to which the frame supporting the door is attached or on the door, it is possible to easily adjust the speed for the opening/closing stroke of the door. Since the door can be opened and closed by rotating only in one direction, the effect is achieved that a device for switching the direction of rotation is not required by simply using a normal rotation drive device.

Then, the crank wheel connected to the motor of the circular motion linear motion conversion device is easily linked.
Because the rack is engaged with the chain that is engaged with the door via the sprocket, the lightweight chain does not have a large inertia force even in processes where the inertia force is large when opening or closing the door. As a result, no strain is placed on the drive mechanism such as the motor at the end of the stroke when the door is closed or when the door is opened, resulting in excellent effects such as improved durability and extended service life.

In addition, since the door opens and closes quietly, it has the effect of extending the life of the door and improving its durability, which also has the advantage of reducing repair costs.

[Brief explanation of the drawing]

Figure 1 is a perspective explanatory diagram of a warehouse, Figure 2 is a schematic front view of a door opening/closing device based on the conventional technology, Figure 3 is a graph of its operation, and Figures 4 and below show examples of this invention. FIG. 4 is an overall schematic front view of one embodiment, and FIG. 5 is an overall schematic front view of another embodiment. 1... Warehouse, 2... Opening, 4... Frame,
5, 6...Rail, 8'...Motor, 26...Device for converting circular motion into linear motion, 7...Door, 1
9, 19'...Rack, 23...Crank pin,
20...Crank wheel.

Claims (1)

[Scope of utility model registration request] A door installed at an opening in a building is engaged with a drive device via a chain, and is extended to the opening via a device that converts circular motion into linear motion, and slides laterally along the rails of the frame to open and close. In the door opening/closing device, the crank wheel of the device for converting the circular motion into linear motion is engaged with the motor via a gear, and the crank wheel is attached to the base end of the rack that is slidable on the frame. A door opening/closing device characterized in that the rack is engaged through a crank pin provided on the door, the rack is linked to a sprocket, and the sprocket is engaged with a chain connected to the door.