JP2002188383A - Shutter structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assure stable stop precision even when a shutter body is repeatedly wound or rewound. SOLUTION: In a shutter A, the shutter body 1 is wound or rewound by speed-reducing rotation of a motor 4b by a reduction gear 4c having a gear train to rotate a winding drum 2. When the shutter body 1 reaches a speed reduction start point Sad close to a winding upper limit position Sa, or when the shutter body reaches a speed reduction start point Sbd close to a winding lower limit position Sb, rotation speed of the motor 4b is reduced, and when the shutter body 1 reaches the winding upper limit position Sd or the winding lower limit position Sb, it is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter structure in which a shutter is stopped accurately when a shutter is rolled up to open an opening or when a shutter is rolled down to close an opening. It is about.

[0002]

2. Description of the Related Art In an electric shutter used for an opening including a window formed in a building such as a house, a factory or a warehouse, a shutter body in which a plurality of slats are arranged in parallel is wound around a winding drum, or wound up. The opening is opened and closed by lowering the shutter body that has already been wound. Further, the rotation of the motor is reduced and transmitted to the winding drum through a gear train in which a plurality of gears are combined, and the shutter is wound up and down at an appropriate speed.

[0003] In the shutter as described above, when the shutter body reaches the upper limit of the winding and / or when the lower limit of the winding is reached, a brake is applied to the motor to instantaneously stop the rotation of the winding drum. It is configured. Therefore, a signal is generated by detecting the upper winding limit and / or lower winding limit of the shutter body, and based on this signal, the rotation of the motor is stopped and at the same time the brake is applied.

In order to detect the upper and lower winding limits of the shutter body, the total rotation angle of the motor required to move the shutter body from the upper winding limit to the lower winding limit is detected and stored in advance. There is a configuration in which the rotation of the motor is detected by a rotary encoder and calculated each time the motor is wound up and down, and a signal is generated when the calculation result matches the stored total rotation angle.

[0005]

In the above shutter,
When the shutter reaches the winding upper limit or the winding lower limit, the rotation of the motor is stopped to stop the winding drum, thereby stopping the winding and lowering of the shutter. As described above, when the rotation of the winding drum is stopped by stopping the motor, an error may occur in the stop position of the winding drum due to the influence of the backlash in the reduction gear transmission.

The error of the stop position does not cause a serious problem when the number of times of use of the shutter is small, but there is a problem that the error is accumulated from the initial stop and greatly deviates from the initial stop as the number of times of use of the shutter is increased. Occurs.

An object of the present invention is to provide a shutter structure capable of guaranteeing stable stopping accuracy regardless of whether the shutter body is repeatedly wound up or down.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a shutter structure according to the present invention reduces the rotation of a motor by a speed reducer, rotates a winding drum, winds up a shutter body, and opens an opening. Or it is a shutter structure in which the shutter body is lowered and closed, and when approaching the upper limit of the shutter body when winding up the shutter body, or approaching the lower limit of the shutter body when lowering the shutter body. At this time, the rotation speed of the motor is reduced, and the motor is stopped when the shutter reaches the winding upper limit and the winding lower limit.

In the above-mentioned shutter structure, when the shutter body approaches the winding upper limit and the winding lower limit, the rotation speed of the motor is reduced, so that the rotation speed of the winding drum is reduced and inertia can be reduced. And the shutter body is the upper limit of the winding,
By stopping the motor when the winding lower limit is reached,
The gear can be stopped at a stable position by eliminating the effect of the backlash of the gears constituting the reduction gear.

The total rotation angle of the motor when the shutter body moves from the upper winding limit to the lower winding limit is detected and stored in advance, and the rotation angle of the motor accompanying the actual winding and lowering of the shutter body is detected from the rotary encoder. It is possible to detect by calculating the generated pulse signal, add or subtract the calculated value and the stored value, and when the difference between them becomes a constant value, control to reduce the rotation speed of the motor. I can do it. When the calculated value of the pulse signal from the rotary encoder matches the stored value, the control is performed so that the rotation of the motor is stopped, so that the shutter body is accurately stopped at the preset upper and lower winding limits. Can be done.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the shutter structure will be described below with reference to the drawings. FIG. 1 is a diagram schematically illustrating a control structure of a shutter. FIG. 2 is a perspective view illustrating the configuration of the shutter. FIG. 3 is a diagram illustrating a change in the rotation speed of the motor.

In the shutter structure according to the present invention, when the shutter body is wound up or down by the winding drum, when the shutter body approaches a preset stop position of the upper limit of the shutter body or a stop position of the lower limit of the winding, By reducing the rotational speed of the motor, the inertia of the winding drum is reduced, and when the shutter body reaches the upper and lower limits of the winding, the motor is stopped to stop the winding cylinder and the shutter body. This is to eliminate the influence of gear backlash in the reduction gear arranged between the gears and eliminate the shift of the stop position.

First, the schematic structure of the shutter A will be described with reference to FIG. The shutter A is formed by winding up a shutter body 1 in which a plurality of slats are connected in parallel and winding them up by a winding drum 2, thereby opening an opening 3 such as a window or an entrance or lowering the shutter body 1 by a winding drum 2. The opening 3 is configured to be closed.

The shutter body 1 has one end attached to the winding drum 2, and is configured to be wound up or down by the winding drum 2 by rotating the winding drum 2. . For this reason, the output shaft 4a of the driving member 4 is connected to one end of the winding drum 2, and the motor 4b of the driving member 4 is driven to rotate the winding drum 2 in a predetermined direction. It is possible to raise or lower the shutter body 1 along the guide 5.

The driving member 4 includes an output shaft 4a, a motor 4
b and a speed reducer 4c. Output shaft 4
a has a function of transmitting power to the winding drum 2,
The output shaft of the reduction gear 4c can be configured as a common shaft. By connecting the output shaft 4a and the winding drum 2 with a shaft coupling (not shown), the winding drum 2 can be rotated with the rotation of the motor 4b.

The motor 4b is preferably a variable speed motor such as a DC motor or a stepping motor. By using such a motor 4b, when the shutter body 1 approaches the upper winding limit and the lower winding limit, the rotation speed can be easily reduced and the shutter body 1 can be rotated.
Can be easily stopped when reaches the winding upper and lower limits.

The reduction gear 4c reduces the rotational speed of the motor 4b at a preset reduction rate and transmits power to the output shaft 4a, and is configured by meshing a plurality of gears. The structure of the reduction gear 4c is not limited as long as it has a gear train. For example, the reduction gear 4c is configured by combining a plurality of spur gears,
There is a worm and a worm wheel.

Next, the control system of the shutter A is shown in FIG.
This will be described below. In the figure, a rotary encoder 6 is attached to a motor 4 a constituting a driving member 4, and a signal generated from the rotary encoder 6 is transmitted to a control member 7. An operation panel 8 for operating the shutter device A is connected to the control member 7.

The rotary encoder 6 includes a motor 4b
Is a signal generating member that generates a signal in accordance with the rotation of the winding drum 2, and may be directly attached to the output shaft 4a for rotating the winding drum 2 or to the winding drum 2. However, if no slippage occurs between the motor 4b and the output shaft 4a, the same signal is generated regardless of whether the motor 4b is attached to any part. Therefore, in this embodiment, the rotary encoder 6 is attached to the motor 4a. I have.

The control member 7 controls the setting of the stop position of the shutter body 1 in the shutter A, the activation of the motor 4b, and the reduction or stop of the rotation speed, and calculates a pulse signal generated from the rotary encoder 6. And a calculation unit 7a for performing other calculations, and a shutter body 1
Necessary for storing a calculated value (the number of pulses) corresponding to the position set in the above, a rotation speed control program for accelerating or decelerating the rotation of the motor 4b, and a shutter A operation. And a storage unit 7c in which a special program is written.

The primary storage unit 7b stores a pulse signal of the rotary encoder 6 corresponding to the total rotation angle of the motor 4b required for the shutter body 1 described later to reach the winding lower limit position Sb from the winding upper limit position Sa. The value is stored.
The storage unit 7c stores a control line for controlling the rotation speed of the motor 4b when the shutter body 1 shown in FIG. 3 is wound up and down.

In the figure, the solid line shows the speed characteristic when the shutter body 1 is wound up, the dotted line shows the speed characteristic when the shutter body 1 is rolled down, and Sau and Sbu respectively show the winding and winding up of the shutter body 1. Motor 4 when lowering
b corresponds to the rising time from the stop state to the maximum speed, and is set according to the weight of the shutter body 1 and the winding drum 2 and the load characteristics of the motor 4b.

Sad shown in FIGS. 1 and 3 indicates a starting point for reducing the rotation speed of the motor 4b when the shutter body 1 is wound up, and is set at a position close to the winding upper limit Sa, and Sbd is a shutter. It indicates the starting point for reducing the rotation speed of the motor 4b when lowering the body 1, and is set at a position close to the lower winding limit Sb.

The distance between the starting point Sad and the position Sa and the distance between the starting point Sbd and the position Sb are not particularly limited.
Any distance may be used as long as the inertia of the speed reducer can be gradually reduced to eliminate the effect of the backlash of the speed reducer. Accordingly, the dimensional relationship between the starting point Sad and the position Sa, and the dimensional relationship between the starting point Sbd and the position Sb are appropriately set in accordance with conditions such as the weight and the winding speed of the shutter body 1 and the winding drum 2, and the set control program is stored in the storage unit 7c. Is written to. For example, the deceleration starting point Sad when winding up the shutter body 1 is set at 10 cm from the winding upper limit Sa.
Is set as the control program for raising and lowering the shutter body 1 in the storage section 7c.
Is written to.

The operation panel 8 has a function of opening and closing the shutter A and generating an instruction signal when the stop position of the shutter body 1 is set. For this reason, the operation panel 8 includes a hoisting switch 8a that generates a signal for winding up the shutter body 1, a lowering switch 8b that generates a signal for lowering the shutter body 1,
It is provided with a stop switch 8c for generating a signal for stopping the shutter body 1 and a setting switch 8d for generating an instruction signal for setting a stop position.

In the shutter A configured as described above,
By operating the raising switch 8a, a signal for winding the shutter body 1 is generated on the driving member 4 via the control member 7, and the motor 4b rotates the winding drum 2 in the direction of winding the shutter body 1 based on this signal. Let it. As a result, the shutter body 1 rises, and the opening 3 can be opened.

When the lower switch 8b is operated, a signal for lowering the shutter body 1 is generated by the motor 4b of the driving member 4 via the control member 7, and the motor 4b operates the shutter body 1 based on this signal. The winding drum 2 is rotated in the lowering direction. Thereby, the shutter body 1 can be lowered to close the opening 3.

When the stop switch 8c is operated, the motor 4b is connected to the motor 4b via the control member 7.
Is generated, and even if the shutter body 1 is being wound up or down, the motor 4b can be stopped to stop the shutter body 1 at that position.

Next, the case where the stop position of the shutter body 1 is set, for example, as shown in FIG. 1, the case where the stop position of the shutter body 1 is set to two positions of a winding upper limit position Sa and a winding lower limit position Sb. explain.

First, the motor 4b is driven by operating the hoist switch 8a to wind up the shutter body 1. In this state, a pulse signal is continuously generated from the rotary encoder 6 attached to the motor 4b, transmitted to the control member 7, and calculated by the calculation unit 7a. And shutter body 1
When the lower end of the motor reaches the winding upper limit position Sa, the stop switch 8c is operated to stop the motor 4b and stop the shutter body 1.

When an instruction signal is generated by operating the setting switch 8d in the above state, the instruction signal is transmitted to the control member 7, and the calculated value of the pulse stored in the primary storage section 8b is erased to reset the value to 0. By storing the value, the winding upper limit position Sa is set. When this operation is completed, the setting lamp 8
e is lit, confirming this lighting, and setting switch 8
The operation d is ended.

Next, the lower switch 8b is operated to drive the motor 4b to lower the shutter body 1. A pulse signal is generated from the rotary encoder 6 with the driving of the motor 4b, transmitted to the control member 7, and calculated by the calculation unit 7a. Then, when the lower end of the shutter body 1 reaches the winding lower limit position Sb, the stop switch 8c is operated to stop the motor 4b and stop the shutter body 1.

When an instruction signal is generated by operating the setting switch 8d in the above state, the instruction signal is transmitted to the control member 7, and the number of pulses, which is an operation value calculated by the operation section 7a, is stored in the primary storage section 7b. Thus, the winding lower limit position Sb is set.

After the upper winding position Sa and the lower winding position Sb are set as described above, the shutter A such as the weight of the shutter body 1, the weight of the winding drum 2, and the winding speed of the shutter body 1 is set. The starting point Sau on the upper side and the starting point Sb on the lower side for reducing the rotation speed of the motor 4b in consideration of the set conditions.
u is set and written in the storage unit 7c of the control member 7.

For example, when winding up the shutter body 1,
When the starting point Sd of the deceleration is set to 10 cm with respect to the winding upper limit position Sa, the above value is written in the control program, and when the d body 1 is wound up, the arithmetic unit 7a determines the rotation of the motor 4b from the rotary encoder 6 The pulse signal is calculated, and when it is recognized that the shutter body 1 has reached the position of 10 cm up to the winding upper limit Sa, a deceleration signal is generated to reduce the rotation speed of the motor 4b to reduce the rotation speed, thereby reducing the rotation speed. 4c, the influence of the backlash of the gear train is eliminated, and furthermore, when the shutter body 1 reaches the winding upper limit Sa, the rotation of the motor 4b is stopped, thereby preventing the variation of the stop position of the shutter body 1. As a result, it is possible to improve stopping accuracy.

When lowering the shutter body 1 from the upper winding position Sa, the distance between the deceleration start point Sbd and the lower winding limit Sb is set and written in a control program, and the same control is performed. 1 is the starting point Sb
d, a deceleration signal is generated and the motor 4b
The rotation speed of the shutter body 1 and the shutter body 1
By stopping the rotation of the motor 4b when the rotation speed reaches “b”, variation in the stop position of the shutter body 1 can be prevented, and stop accuracy can be improved.

[0037]

As described in detail above, in the shutter structure according to the present invention, when the shutter body which is wound up and down by the winding drum approaches the winding upper limit and the winding lower limit,
The motor rotation speed is reduced and the motor is stopped when the shutter reaches the upper and lower limit of the winding on the straw, so the inertia acting on the winding drum is reduced and the gears in the reducer are reduced. The effects of backlash can be eliminated. For this reason, the accuracy of the stop position of the shutter body can be improved.

[Brief description of the drawings]

FIG. 1 is a diagram schematically illustrating a control structure of a shutter.

FIG. 2 is a perspective view illustrating a configuration of a shutter.

FIG. 3 is a diagram illustrating a change in the rotation speed of a motor.

[Explanation of symbols]

 A Shutter Sa Winding upper limit stop position Sau Starting point of deceleration during hoisting Sb Winding lower limit stopping position Sbu Starting point of decelerating during hoisting 1 Shutter body 2 Winding cylinder 3 Opening 4 Drive member 4a Output shaft 4b Motor 4c Transmission unit 5 Guide 6 Rotary encoder 7 Control member 7a Operation unit 7b Primary storage unit 7c Storage unit 8 Operation panel 8a Hoist switch 8b Unwind switch 8c Stop switch 8d Setting switch 8e Setting lamp

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Kenichi Tanaka 2-10-16 Midori, Sumida-ku, Tokyo Daiwa Tape Co., Ltd. (72) Inventor Kenji Hosoyama 2-3-5 Shinkawagishi, Itabashi-ku, Tokyo Miwa F-term in Shutter Industrial Co., Ltd. (reference) 2E042 AA01 CA01 CB01 CB02 CB05 CB06 CB10 CC00 CC08 DA01

Claims (1)

[Claims] 1. A shutter structure in which the rotation of a motor is reduced by a speed reducer and a winding drum is rotated to wind up a shutter body to open an opening or to wind down and close a shutter body to close the shutter body. When the shutter body approaches the winding upper limit of the shutter body, or when the shutter body approaches the winding lower limit of the shutter body, the rotation speed of the motor is reduced, and the shutter body moves to the winding upper and lower winding limits. A shutter structure characterized in that the motor is stopped when it reaches.