JPH11107654A - Balance type electric shutter for construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain miniaturization by installing a second elastic machine, in which energy is accumulated from a place slightly fronter than the full opening of a shutter curtain and offsetting the energy accumulating force of a first balance elastic machine. SOLUTION: A balance type elastic machine 10 is set so that energy accumulating force to the opening side towards the closing posture of a shutter curtain 1 is increased. A second elastic machine 11 is set so that energizing force to the closing side of the shutter 1 is accumulated with the revolution of a wind-up drum 2 when the curtain 1 reaches a place on the side slightly closer than a fully-opened state. The elastic machine 11 is set so that revolving torque to the closing side is increased towards a fully-opened place while the energy accumulating force of the elastic machines 10, 11 is equalized approximately at the fully-opened place at that time. Load to an electric open-close machine 9 in the vicinity of the full opening of the curtain 1 is set so as to reach approximately zero by offsetting upward revolving torque, from which the difference of the energizing force of the elastic machine 10 and curtain-delivery its own weight is subtracted, by the downward revolving torque of the elastic machine 11. Accordingly, the electric open-close machine can be miniaturized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a balanced electric shutter for architectural use, which is built in an opening such as a window or an entrance.

[0002]

2. Description of the Related Art In general, in this type of electric shutter, in order to reduce the load on an electric switch, the shutter curtain is fed in cooperation with the closing operation of the shutter curtain, and the curtain of the shutter curtain extended to an opening is extended. Attempts have been made to equip balance ammunition to balance with its own weight. The relationship between the change in the energy stored in the balance armature and the self-weight of the shutter curtain at the portion fed to the opening, that is, the curtain-extended own weight, shows that the energy stored in the balance armature changes linearly. Since the shutter curtain is wound around a winding drum in a spiral shape and is fed out, it changes in a curved manner. Therefore, conventionally, the energy storage force TB of the balance elastic machine is, as shown in FIG. In order to approximate the curtain extension weight TC, the size of the curtain extension weight is set to be balanced at two points in the process of opening and closing the shutter curtain. By the way, the winding drum receives both the accumulating force of the balance armature which becomes the upward rotation force and the curtain feeding weight which becomes the downward rotation force. When the straight line TB is set and the curtain unwinding weight is set as a curve TC, a curve TD corresponding to the sum of these is expressed as a rotational force applied to the winding drum. That is, during the opening operation of the shutter curtain, the winding drum receives an upward rotational force from the fully closed position to the first balancing position A, and from the first balancing position A to another second balancing position B. During this time, the shutter curtain receives a downward rotating force, and during the period from the second balancing position B to the fully opened position, it receives an upward rotating force. Therefore, the shutter curtain moves up from a state approaching the fully opened state. Has become.

[0003]

As described above, when the shutter curtain is closed when the shutter curtain is fully open and the shutter is closed, the electric switch receives a load that resists the closing drive. Therefore, in order to perform the closing operation of the shutter curtain, an electric switch having an output exceeding the load is required, and there is a problem that the miniaturization of the electric switch is impaired. In contrast, when opening the shutter curtain,
As the vehicle approaches the fully open state, the electric switch receives a load in the same direction as the open drive, and therefore, when the electric motor is fully opened and the electric motor stops driving, the brake becomes slippery, and the shutter curtain is closed. There is a problem of not stopping immediately, and there is a problem to be solved by the present invention.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been created with the object of solving these problems. The present invention provides a shutter curtain for opening and closing an opening, and a shutter curtain. A winding wheel that is wound to perform opening and closing operations, an electric switch for rotating the winding drum forward and reverse, one end is connected to the skeleton side, and the other end is connected to the winding drum side, In a balanced electric shutter for architectural purposes, which is provided with a balance elastic machine for balancing with the curtain feeding weight of the shutter curtain fed to the opening, which is stored in connection with the closing operation of the shutter curtain and is fed to the opening. Between the winding drum and the skeleton side, the energy stored in a position slightly before the full opening of the shutter curtain is offset by the energy stored in the balance armature. It is provided with a bullet machine. By doing so, the size of the electric switchgear can be reduced.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention can be made as the following embodiments. That is, a shutter curtain that opens and closes the opening, a winding drum that is wound to open and close the shutter curtain, an electric switch that rotates the winding drum in the forward and reverse directions, and one end located on the skeleton side. A balance elastic machine for connecting the other end to the take-up drum side, accumulating energy in connection with the closing operation of the shutter curtain, and balancing the curtain feeding weight of the shutter curtain fed to the opening. Load detecting means for detecting that the load acting on the electric switch is equal to or greater than a preset load, and control means for outputting a stop command to the electric switch based on the load detected by the load detecting means. In the architectural balance type electric shutter configured to include, the energy storage of the balance elastic machine, the boundary of the open-side balanced position with respect to the curtain feeding own weight. It is set so as to be larger on the open side than that, and between the winding drum and the skeleton side, the balance elasticity accumulating force that becomes larger on the open side than the equilibrium position is offset, and the balance elasticity is increased. It is preferable that a second ammunition is provided to prevent the detection of the load that has received the machine energy. In this case, the energy stored in the fully opened state of the second ammunition is determined by subtracting the difference between the energy stored in the balanced armature in the fully opened state and the weight of the curtain extended from the load. In particular, the load may be within the set load, particularly zero (a state in which the difference between the energy stored in the balance armature and the curtain feeding weight and the energy stored in the second armature are approximately equal) or less than zero (It is preferable that the energy stored in the second armature is larger than the difference between the energy stored in the balance armature and the own weight of the curtain feeding).

Next, a specific example of the embodiment of the present invention is shown in FIG.
7 through FIG. In the drawings, reference numeral 1 denotes a shutter curtain of a balance-type electric shutter. The shutter curtain 1 is wound around a winding drum 2 to open an opening, and is opened from the winding drum 2 to open. It is set so as to elevate and lower to a closed posture for closing the part, and these basic configurations are all conventional. 3 is erected on both left and right sides of the opening,
It is a guide rail for moving and guiding the left and right side edges of the shutter curtain 1.

The winding drum 2 includes a plurality of wheels 6 and an internal gear ring gear 7 rotatably disposed on a fixed shaft 5 supported between a pair of left and right brackets 4 disposed above the frame. And a pair of stays 8 for integrally connecting between the wheel 6 and the internal gear 7. An electric switch 9 with a built-in drum is attached to the fixed shaft 5, and an output gear (pinion gear) 9 a of the electric switch 9 meshes with the internal ring gear 7, so that the electric switch 9 is driven. The driving force is set to transmit power to the winding drum 2. The output gear 9a is externally fitted to the extended output shaft 9b protruding from the electric switchgear 9 while rotating integrally with the output gear 9b while being movable in the axial direction. It is held on the side that meshes with the ring gear 7. The engagement with the internal gear 7 can be released based on the switching operation of the manual switching device (clutch means) 9d, whereby the electric switch 9 and the winding drum 2 can be disengaged. The power transmission between them is intermittently switched so that electric operation and manual operation can be performed.

[0008] Between the fixed shaft 5 and the wheel 6, there is provided a balance ammunition 10 and a second ammunition 11 embodying the present invention. By doing so, the rotational force based on the load of the shutter curtain 1 received by the winding drum 2 is reduced,
Thus, the load of the electric switch 9 for driving the winding drum 2 is set to be small. The balance ammunition 10 includes a second ammunition 11 which will be described later in the present embodiment.
A pair of left and right coil springs, one end of which is connected to the wheel 6 and the other end of which is connected and fixed to the fixed shaft 5, respectively, are used.
Is stored in association with the closing operation of the shutter drum, and the more the shutter curtain 1 is in the closed position (the larger the downward rotational force acting on the winding drum 2 is), the more the stored energy on the opening side (winding drum). 2 is set to increase. The energy stored in the pair of balance arms 10 is approximately balanced with the weight of the shutter curtain 1 fed to the opening when the shutter curtain 1 is fed out. At the position (first balancing position A) and the position closer to the closed side than the fully opened state (second balancing position B), the energy storing force of the balance elastic machine 10 and the curtain extension own weight are set to exactly balance. On the open side from the second balancing position B, the energy stored in the balance elastic machine 10 is set so as to exceed the curtain feeding own weight.

On the other hand, the second ammunition 11 is constituted by a coil ammunition wound in a direction opposite to that of the balance ammunition 10, one end of which is fixed to the wheel 6 and is loosely fitted to the fixed shaft 5. A hook 11a is formed at the other end which is a free end. On the other hand, the movable cylindrical body 11b is fitted on the fixed shaft 5 so as not to rotate integrally with the fixed shaft 5 in the direction around the axis but to be movable in the axial direction. The pin 11c protruding from the movable cylinder 11b is set to protrude from between the coils of the second ammunition 11. And
When the winding drum 2 rotates in connection with the opening operation of the shutter curtain 1 in the fully closed state, the shutter curtain 1
Until reaches the second equilibrium position B, the second machine 11 is freely rotating in accordance with the rotation of the winding drum 2, and the pin 11 c is guided by the second machine 11 in the state described above. It is set to move toward the hook 11a side. Then, the pin 11c of the lower moving cylinder 11b is locked to the hook 11a of the second ammunition 11 at the same timing as reaching the second equilibrium position B, and thereafter the second ammunition 11 is fully opened. Is set so as to accumulate an accumulating force on the side that closes the shutter curtain 1 with the rotation of the winding drum 2 (a rotating force in a direction opposite to that of the balance elastic machine 10 and directed downward).

Next, the rotational force TD applied to the winding drum 2
Will be described with reference to FIG. In the figure, the upward rotation force is represented as a positive value, and the downward rotation force is represented as a negative number. Curtain delivery weight in the operation process from full opening to full closing of the shutter curtain 1 is represented by a curve TC, and the energy stored in the balance elastic machine 10 is represented by a curve TC. The straight line TB and the energy stored in the second ammunition 11 are represented as a straight line TS, respectively. According to this, the straight line TB indicating the change in the accumulated force of the balance armature 10 decreases with the opening of the shutter curtain 1, but the straight line TB balances the change in the own weight of the shutter curtain 1 which is the downward rotating force. To this end, it is set so as to intersect a virtual curve TC (two-dot chain line) represented as an absolute value of the curve TC (solid line) at the first and second balancing positions A and B. For this reason, the straight line TB has a value smaller than the virtual curve TC between the first balanced position A and the second balanced position B, and is closer to the closed side than the first balanced position A and more open than the second balanced position B. The value on the side is larger than the virtual curve TC. On the other hand, a straight line T indicating the change in the stored power of the second
S is opposite to the inclination of the straight line TB, and is set such that the downward rotational force increases from the second balancing position B to the fully opened position. Then, at the fully opened position of the shutter curtain 1, the stored power P <b> 1 of the second ammunition 11 and the stored power of the balance ammunition 10 are set to be substantially equal.

Then, the curves TC, TB, TS
Is the rotational force that the winding drum 2 receives, and this rotational force acts as a load on the electric switchgear 9. The rotational force of the winding drum 2 is represented by a curve TD.
It is represented by That is, during the period from the fully closed state to the second balancing position B, the winding drum 2 receives the rotational force obtained by adding the straight line TB and the curve TC, and as a result, the winding drum 2 faces upward on the closing side of the first balancing position A. , And receives a downward rotating force from the first balancing position A to the second balancing position B. The straight line TB and the curve T
The sum of C and the straight line TS (the energy stored in the second ammunition 11) is the rotational force of the winding drum 2. The absolute value of the straight line TS (broken line) is greater than the second balanced position B. Is also set to a size approximating a curve obtained by adding the straight line TB and the curve TC on the open side (shown by a dashed line).
The winding drum 2 generates an upward rotation force obtained by subtracting the difference between the energy stored in the balance elastic machine 11 and the curtain feeding own weight,
The load is offset by the downward rotational force based on the accumulating force of the second ammunition machine 11, so that the load on the electric switchgear 9 becomes substantially zero in the vicinity of the full opening of the shutter curtain 1. Here, the maximum downward rotational force P2 received by the winding drum 2 and the maximum upward rotational force P received at the fully closed position
3, and the accumulating force P1 of the balanced ammunition at the fully open position is substantially equal.

A motor yoke 9f constituting the electric switchgear 9 has first and second motor holders 12 and 13 integrally mounted on both ends in the axial direction.
An extended output shaft 9b rotatably protruding from the second motor holder 13 and a rear protruding shaft 9e rotatably protruding from the second motor holder 13 are provided on bearing portions 14a formed on the first and second motor brackets 14, 15, respectively. 15a respectively rotatably supported. When the first and second motor brackets 14 and 15 are fixed to the fixed shaft 5, the first and second motor holders 12 and 13 are attached to the first and second motor brackets 14 and 15 together with the motor yoke 9f. It is set so as to be rotatable and displaceable. on the other hand,
16 is the first motor holder 12 and the first motor bracket 1
4, a substantially U-shaped neutral holding spring disposed between the motor yoke 9f and the motor yoke 9f, which is rotatably displaceably supported, at a substantially intermediate position in the rotation range. Set to keep. When a reaction force is applied to the neutrally held motor yoke 9f according to the load applied to the extension output shaft 9b from the winding drum 2 side, the neutrally held spring 16 is rotated by an amount corresponding to the reaction force. It is set so that the rotational displacement is performed in a state where it opposes. Incidentally, the reaction force received by the motor yoke 9f is, as shown in FIG. 6, the rotation direction of the extension output shaft 9b is in the direction of arrow A, and the load acting on the winding drum 2 is the rotation force in the direction of arrow A. Is a rotational force that rotates in the direction of the arrow A when the arrow is pressed.

In this case, the biasing force of the neutral holding spring 16 rotates the motor yoke 9f within a predetermined range under a load in a normal opening / closing operation, but when the shutter curtain 1 sandwiches an obstacle, When the closed position is reached, the load on the shutter curtain 1 and the balance
When the balance with the accumulating power of 1 is lost, the motor yoke 9
f is largely rotated and displaced in a predetermined direction, and when the shutter curtain 1 reaches the fully opened position, when the seat plate 1a at the lowermost end of the shutter curtain 1 comes into contact with the magsa and a tensile load is applied to pull the shutter curtain 1, The motor yoke 9f is set to largely rotate and displace in the other direction. When the motor yoke 9f rotates greatly, the limit switch 17 or 18 is operated (detection operation) to stop driving of the electric switchgear 9. Thus, the load detecting means is constituted. Have been. By the way, these limit switches 17, 18
Are arranged on a control panel 19 integrally provided between the first and second motor brackets 14 and 15, and are displaced based on the rotation amount of the motor yoke 9f (first motor holder 12). The setting is such that the push operation is performed by swinging the operation arm 20 by the rod 20a. Then, a shutter control circuit 19a disposed on the control panel 19
Is configured to open when the limit switch 17 or 18 is pressed, and to stop driving the electric switch 9.

When the shutter curtain 1 is opened, an upward load is applied to the electric switch 9 from the fully closed position to the first balancing position A.
Since the rotational force is in the same direction as the rotational driving force of the electric switchgear 9, the detection operation of the load detection is delayed. However, there is no problem since this operation is performed at the beginning of opening. Then, the shutter curtain 1 approaches the fully opened position and the first equilibrium position A
Is exceeded, the load from the winding drum 2 side is removed from the electric switchgear 9 and the lowermost seat plate 1a of the shutter curtain 1
Is performed without delay, so that the shutter curtain 1 does not stop when the seat plate 1a is in strong contact with the magsa. On the other hand, when the shutter curtain 1 is closed, no rotational force from the winding drum 2 acts on the electric switch 9 from the fully open state to the position B, and a smooth closing operation is started. And A
During the period from the position to the fully closed state, an upward rotational force acts on the electric switchgear 9, whereby it becomes possible to make the load detection based on the application of the upward load near the fully closed state easy to perform. It is set so that accurate stop operation can be performed.

In the embodiment of the present invention configured as described above, the shutter curtain 1 opens and closes by forward and reverse rotation of the winding drum 2 accompanying driving of the electric switch 9. In this case, the winding drum 2 receiving the own weight of the shutter curtain 1 can measure the reduction of the load applied to the electric switch 9 by receiving the accumulating force of the balance elastic machine 10, whereby the electric switch 9 can be measured. Can be reduced in size. Further, between the second balancing position B and the fully open position, the winding drum 2
Since the upward rotational force received from the balance armature 10 is offset by the downward rotational force received from the second armature 11, when the shutter curtain 1 is closed from the fully open state, the load applied to the electric switch 9 is reduced. As a result, when the shutter curtain 1 is closed, it is necessary for the electric switch to exceed the load based on the balance elastic machine as in the case of closing the shutter curtain of the conventional upward type. And further downsizing can be achieved. Also, in a configuration in which the brake is activated when the drive is stopped in the fully opened state, the load from the winding drum is not received in the fully opened state, so that the brake is slippery like the conventional climbing type. There is no such a problem.

In addition, when the drive is stopped based on the load detection of the electric switchgear 9, if the upward movement is performed as in the prior art, the upward rotation force of the balanced elastic machine when the closing operation is performed from the fully open state. However, there is a problem in that the load detection may be performed, and the detection accuracy of the load detection must be reduced. However, since the load in the fully open state becomes substantially zero, the detection accuracy does not need to be reduced. Further, in this case, when the shutter curtain 1 is opened, the load on the electric switch 9 is almost zero when the shutter curtain 1 is almost fully opened. There is no inconvenience that load detection is delayed due to the upward rotation force acting in the same direction as the rotation direction of the machine, and the seat plate 1a and the magsa are strongly pressed against each other.

In practicing the present invention, the position at which the second ammunition starts to be charged does not necessarily need to coincide with the second balancing position at which the stored force of the balance armature is balanced with the curtain feeding weight. It may be set at this front and rear vicinity position. Further, the accumulating force of the second ammunition does not need to match the accumulating force of the balanced ammunition in the fully opened state, and the difference in magnitude is within a predetermined load set for load detection. I just need.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a balance-type electric shutter.

FIGS. 2 (X) and 2 (Y) are a partially cutaway front view of a winding drum and an enlarged front view showing a mounted state of a second ammunition.

FIG. 3 is a plan view of the electric switch.

FIG. 4 is a front view of the electric switchgear.

FIGS. 5 (X) and 5 (Y) are a schematic front view and a schematic side view, respectively, of the electric switchgear.

FIG. 6 is a perspective view illustrating a load detection operation of the electric switchgear.

FIG. 7 is a graph illustrating the relationship between the curtain feeding own weight, the energy stored in the balance armature, and the energy stored in the second armature.

FIG. 8 is a graph showing the relationship between the weight of a conventional curtain dispenser and the energy stored in a balance armature.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shutter curtain 2 Winding drum 5 Fixed shaft 6 Wheel 9 Electric switch 10 Balanced ammunition 11 Second ammunition 14 First motor bracket 16 Neutral holding spring 17 Limit switch TC Curtain unwinding weight TB Energy storage of a balance armature Force TS Energy of the second ammunition

Claims (1)

[Claims] 1. A shutter curtain for opening and closing an opening, a winding wheel wound to open and close the shutter curtain, an electric switch for rotating the winding drum forward and reverse, and one end. It is connected to the skeleton side, the other end is connected to the winding drum side, and the energy is accumulated in connection with the closing operation of the shutter curtain, and is balanced with the curtain weight of the curtain of the shutter curtain delivered to the opening. In a balance type electric shutter for construction comprising a balance elastic machine, between the winding drum and the skeleton side, the balance elasticity is accumulated by the energy stored from a position slightly before the full opening of the shutter curtain. Balanced electric shutter for architectural use equipped with a second ammunition that offsets the energy stored in the machine.