JP5265977B2 - Switchgear - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide opening/closing equipment which can prevent the abnormal quick closing of an opening/closing body by a payout stopping means, and which can easily release a malfunction in the payout stopping means. <P>SOLUTION: This opening/closing equipment is equipped with an opening/closing drive unit 30 which makes the opening/closing body 10 operate for opening/closing on its upper side, a payout stopping means 40 which stops the payout of a flexible long member 41 when its payout velocity reaches a predetermined value or above during the payout of the flexible long member 41 and which releases a payout stop state by the loosening of the flexible long member 41, and the like. The opening/closing equipment holds the lower side of the opening/closing body 10 by the flexible long member 41, so as to inhibit the quick closing of the opening/closing body 10 at the velocity of the predetermined value or above. The opening/closing equipment 30, which is equipped with a tension sensing means 43 for sensing the tension of the flexible long member 41 at the stop of the payout, makes the opening/closing drive unit 30 operate in an opening direction under the condition of the presence of a sensing signal made by the tension sensing means 43. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an opening / closing device such as a screen shutter device, a shutter device including an overhead door, a roll screen device, a blind, an awning device, etc., which is opened and closed by sliding an opening / closing body.

Conventionally, in this kind of invention, a seat belt of an automobile or the like is provided between a lower end of an opening / closing body (shutter curtain 2) and an upper shutter case (1), as described in Patent Document 1, for example. There is an opening / closing device provided with a retractor (9.10) used as
According to this prior art, even if the opening / closing body is closed abnormally suddenly due to cutting of the chain of the opening / closing drive source or other causes, the retractor operates when the closing speed exceeds a specified value. Sudden closure can be stopped.

However, according to the above prior art, even when the opening / closing body is in a normal closing operation, for example, when the opening / closing body is caught by a foreign object or the like and then closed abruptly, or when the retractor belt (11, 12) is winded. The retractor (9, 10) may malfunction if it is beaten by the user.
In such a case, it is necessary to take a measure such as manually releasing the operating state of the retractor, which is troublesome.
Therefore, a device for automatically releasing the retracted state of the retractor is proposed. However, in such a device, the retractor is not released without eliminating the cause of the abnormal sudden closing of the opening / closing body. In addition, some ingenuity is required.
JP 2006-28784 A

  The present invention has been made in view of the above-mentioned conventional circumstances, and the problem is that the sudden stop of the opening / closing body can be prevented by the feeding stop means, and the malfunction of the feeding stop means can be easily canceled. An object of the present invention is to provide a switchgear that can be used.

  Technical means for solving the above-mentioned problems include an opening / closing body that can be opened and closed while sliding, an opening / closing drive device that opens and closes the opening / closing body by retracting and retracting the opening / closing body, and an immobilization device. When the flexible long member is drawn out while being supported by the part and the drawing speed exceeds a specified value, the drawing of the flexible long member is stopped and the stopped state is loosened. In the opening / closing apparatus, which is provided with a feeding stop means for releasing the opening and closing, the lower part of the opening / closing body is held by the flexible long member and the sudden closing of the opening / closing body above the specified value is prevented. Provided with tension sensing means for sensing the tension of the flexible long member at the time, and the opening / closing drive device is operated in the opening direction on condition that there is a sensing signal from the tension sensing means. And features

  In a further technical means, the tension sensing means comprises a biasing means for biasing the flexible elongate member in the crossing direction to maintain it in a non-linear shape, and the flexible elongate member comprises: And a sensing switch for sensing that the biasing means has moved in the direction opposite to the biasing direction and outputting a sensing signal.

  In a further technical means, the tension sensing means is provided with a movable seat plate that is slidable relatively upward on the lower end side of the opening / closing body, and a seat for sensing the upward slide of the movable seat plate. A plate sensing unit is provided, and the flexible long member is engaged with the movable seat plate before sliding upward.

  In a further technical means, when the opening / closing drive device is operated in the opening direction on the condition that there is a detection signal from the tension sensing means, the opening / closing drive is performed when the opening operation amount exceeds a predetermined value. The operation in the opening direction of the apparatus is stopped.

  In a further technical means, the opening / closing drive is activated when the tension sensing means does not return to the non-sensing state after the opening / closing drive device is operated in the opening direction on the condition that there is a sensing signal from the tension sensing means. It is characterized in that the operation in the closing direction of the device is prohibited.

In the present specification, the “opening / closing body thickness direction” means the thickness direction of the opening / closing body in the closed state.
In the present specification, the “opening / closing body width direction” means a direction that is substantially orthogonal to the opening / closing direction of the opening / closing body and not the thickness direction of the opening / closing body.
Further, in this specification, the “opening / closing body opening / closing direction” means a direction in which the opening / closing body slides to partition or open the space.

Since the present invention is configured as described above, the following effects can be obtained.
For example, when the opening / closing body is abnormally closed due to a chain breakage of the opening / closing drive device, when the feeding speed of the flexible long member exceeds a specified value, the feeding of the flexible long member Stops, and the abnormal sudden closure of the opening / closing body also stops. After that, the tension is detected by the tension sensing means in the flexible long member, and the opening / closing drive device operates in the opening direction in response to the sensed signal. It is not transmitted to the opening / closing body by such means. Therefore, the opening / closing body is held by the flexible elongate member and is maintained in a stopped state without releasing the opening / closing body and releasing the feeding stop means.
Further, during the normal closing operation of the opening / closing body, for example, when the feeding stop means malfunctions due to catching or the like, tension is generated in the flexible long member due to the malfunction, and the tension is detected by the tension sensing means. The opening / closing drive device operates in the opening direction according to the detected signal. Therefore, the opening / closing body opens, the flexible long member loosens, and the feeding stop means is released. Therefore, the opening / closing body can be quickly closed when the next closing signal is received, without requiring an operation such as manually releasing the feeding stop means.
Therefore, abnormal sudden closing of the opening / closing body can be prevented by the feeding stop means, and malfunction of the feeding stop means can be easily canceled.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the opening / closing apparatus 1 includes an opening / closing body 10 that can be opened and closed while sliding, guide rails 20 and 20 that guide both sides of the opening / closing body 10 in the opening / closing direction, The opening / closing drive device 30 that opens and closes the opening / closing body 10 to open and close it, and the flexible elongate member 41 that is supported by the non-moving part, and the feeding speed becomes a specified value or more. In such a case, there is provided feeding stop means 40 that stops the feeding of the flexible long member 41 and releases the stopped state by loosening of the flexible long member 41.

  The opening / closing body 10 constitutes the opening / closing body main body 11 by connecting a plurality of so-called slats 11a formed by bending a horizontally-long substantially rectangular metal plate so as to rotate between the vertically adjacent slats 11a, 11a. The movable body 11 is slidable upward on the closing direction end of the opening / closing body 11 by contact with a contact target portion p (for example, a floor surface, the ground, a frame member, etc.) or an obstacle (not shown). The seat plate 12 is connected.

The movable seat plate 12 is a member extending over substantially the entire length in the opening / closing body width direction, and is open / closed so as to freely move by a predetermined amount in the opening / closing body opening / closing direction (vertical direction in FIG. 1) relative to the opening / closing body main body 11. The main body 11 is engaged with the connecting portion 11a at the lower end (see FIG. 2).
And the movable seat board 12 comprises the seat board switch which detects that the opening-and-closing body 10 contact | abutted to the object of the closing direction side by having the seat board sensing part 11b in the connection part 11a.

  The seat plate sensing unit 11b is a contact-type or non-contact-type switch (for example, a limit switch, a proximity switch, etc.) provided to sense the movable seat plate 12 when moved in the opening direction relative to the opening / closing body main body 11. The detected signal is transmitted to a control unit (not shown) in the opening / closing drive device 30.

The guide rail 20 is a member having a substantially U-shaped cross section that surrounds the end of the opening / closing body 10 in the width direction, and is disposed between the contact target portion p and the winding device 30.
The guide rail 20 is provided with a support frame 50 for supporting a feeding stop means 40 described later. According to the illustrated example, the support frame 50 has a substantially U-shaped frame shape including left and right support columns 51 and 51 fixed to the guide rails 20 and 20 and a horizontal frame 52 extending between the upper end sides of the support columns 51 and 51. It is configured (see FIG. 1).
A support bracket 53 is fixed between the upper end side of the support column 51 and the end portion side of the horizontal frame 52, and the feeding stop means 40 is supported by the support bracket 53.

Further, the opening / closing drive device 30 includes a winding shaft 32 for winding and unwinding the opening / closing body 10 in a frame-shaped storage portion 31 in which an opening for allowing the opening / closing body 10 to appear and retract is formed on the lower side, and the winding shaft 32. An opening / closing device 34 that rotates and brakes the winding shaft 32 via a power transmission means 33 such as a chain and a sprocket is provided.
The opening / closing machine 34 includes an electric motor that drives and rotates the output shaft in both directions, and a brake device that restrains rotation of the output shaft.
In addition, although the accommodating part 31 is comprised in the frame shape which exposed the internal structure according to the example of illustration, as another example of this accommodating part 31, the box shape which concealed the internal structure may be sufficient.

The feeding stop means 40 is a so-called retractor device used for a vehicle seat belt or the like, and includes a flexible long member 41 that generates tension due to the weight of the opening / closing body 10 during an abnormal stop, and the flexible long member 41. A reel device 42 for winding the proximal end side, and tension sensing means 43 (see FIGS. 2 and 3) for sensing the tension of the flexible long member 41 and outputting the sensing signal, With respect to the support frame 50 on the front side of the guide rail 20, it is disposed on each of the left and right sides.
The feeding stop means 40 holds the lower side of the opening / closing body 10 by the flexible long member 41 and prevents the closing of the opening / closing body 10 beyond a specified value.

  The flexible elongate member 41 is formed by processing synthetic fibers into a substantially elongate belt shape, and fixes the distal end side to the end side in the closing direction of the opening / closing body main body 11 and the base end side that is the opposite side thereof. Is fastened to the outer peripheral surface of the winding body 42a of the reel device 42.

2 and 3, the reel device 42 includes a substantially U-shaped support bracket 42b fixed to the support frame 50, and a winding body 42a rotatably supported in the support bracket 42b. The urging means (not shown) for urging the winding body 42a in the winding direction, and the winding body 42a rotates in the feeding direction against the urging force of the urging means, and the rotation speed is A lock means (not shown) is provided to stop the rotation of the winding body 42a when the value exceeds a specified value.
The locking means restrains the winding body 42a from being unrotatable when the feeding rotation speed of the winding body 42a becomes equal to or higher than a specified speed, for example, a structure in which a member that moves due to centrifugal force is locked to a stationary part. Any structure can be used.
The prescribed speed is an appropriate speed faster than the closing speed when the opening / closing body 10 is closed by driving the opening / closing device 34.
As another example of the reel device 42, when the take-up rotational acceleration of the take-up body 42a is equal to or higher than a specified acceleration, the take-up body 42a may be restrained so as not to be unwound.

The tension sensing means 43 senses the tension of the flexible long member 41 when the feeding is stopped, and transmits the sensing signal to a control unit (not shown).
More specifically, the tension sensing means 43 presses in the intersecting direction (in the direction substantially orthogonal according to the example shown in FIGS. 2 and 3) so as to maintain the flexible elongate member 41 in a non-linear shape. The movable pressing member 43a, the urging means 43b for urging the movable pressing member 43a in the pressing direction, and the flexible elongate member 41 detecting that the urging direction is opposite to the urging direction. A sensing switch 43c for outputting the sensing signal and a guide bracket 43e for guiding the flexible long member 41 to the lower side of the movable pressing member 43a are provided.

The movable pressing member 43a is a substantially shaft-like member that is longer than the width of the flexible long member 41, and both end portions thereof are inserted into the long holes 43d1 of the substantially U-shaped bracket 43d. Yes.
The elongated holes 43d1 are elongated holes formed on both sides in the width direction of the flexible elongated member 41 so as to be elongated in a direction substantially orthogonal to the flexible elongated member 41. According to the illustrated example, It is formed long in a substantially horizontal shape.
Therefore, the movable pressing member 43 a inserted through the long hole 43 d 1 moves in a direction substantially orthogonal to the flexible long member 41.

  The length of the long hole 43d1 is appropriately set so that the moving amount of the movable pressing member 43a is restricted when the movable pressing member 43a presses the sensing switch 43c. According to this configuration, it is possible to prevent the sensing switch 43c from being damaged by an excessive pressing force from the movable pressing member 43a.

The urging means 43b is a coil spring according to the illustrated example, and its one end side is fixed to the bracket 43d and the other end side is fixed to the movable pressing member 43a. The flexible long member 41 is urged in the pressing direction.
In the illustrated example, the urging means 43b is a tension spring and the movable pressing member 43a is arranged to be pulled. However, as another example, the urging means 43b is a compression spring and its elastic force. May be arranged so as to push the movable pressing member 43a.

The sensing switch 43c is a limit switch that outputs a contact signal when the actuator 43c1 is swung, and is fixed to the bracket 43d.
The sensing switch 43c is configured to close the contact a when the actuator 43c1 is pressed by the movable pressing member 43a.
That is, in normal times, as shown in FIGS. 2 and 3, the actuator 43c1 is pressed by the movable pressing member 43a urged by the urging means 43b, thereby closing the a contact inside. When the movable pressing member 43a moves in the reverse direction, the actuator 43c1 is swung in the reverse direction by an urging means (not shown) in the sensing switch 43c to open the contact a.

The guide bracket 43e is fixed to the lower end side of the support bracket 53, and allows the flexible long member 41 to be inserted in the vertical direction. The guide bracket 43e is provided with a guide protrusion 43e1 that protrudes obliquely downward toward the opening / closing body 10 side.
The protruding end portion of the guide protrusion 43e is formed in a curved shape so as to reduce the frictional resistance with the flexible long member 41.
As shown by the two-dot chain line in FIG. 2, the guide protrusion 43e1 prevents the lower end side of the flexible long member 41 from suddenly bending at the position of the movable pressing member 43a by the opening operation of the opening / closing body 10. Thus, the feeding stop operation by the reel device 42 and the tension sensing operation by the tension sensing means 43 are improved.

Two feeding stop means 40 having the above-described configuration are provided so as to correspond to the left and right sides of the opening / closing body 10 by being fixed to the left and right sides of the support frame 50.
The left and right feeding stop means 40, 40 each include a sensing switch 43c. These two sensing switches 43c and 43c are electrically connected in series and are electrically wired to a control circuit (not shown) in the winding device 30.

Next, a characteristic control operation by the control unit (not shown) of the switchgear 1 will be described in detail based on the flowchart of FIG.
First, the control unit waits for a closing command from an operation unit (not shown) (for example, an operation box, a remote controller, a computer that issues an operation signal, a portable terminal, etc.) (step 1).

  And when there exists a closure command, the opening-closing drive apparatus 30 is operated to a closing direction, and the opening-closing body 10 is closed (step 2).

  Next, in step 3, during the closing operation of the opening / closing body 10, it is determined whether or not there is a sensing signal by the sensing switch 43 c of the tension sensing means 43 or the seat plate sensing unit 11 b. The process proceeds to the next step 4; otherwise, the process waits for input of the sensing signal.

  In step 4, the opening / closing drive device 30 is operated in the opening direction. If it demonstrates in detail, the opening / closing machine 34 in the opening / closing drive apparatus 30 will be once stopped, and the opening / closing machine 34 will be reversely rotated immediately after that.

  In step 5, it waits for the opening operation amount of the opening / closing drive device 30 described above to become a predetermined amount or more. Specifically, it waits for the rotation amount or the rotation time of the opening / closing device 34 in the opening / closing drive device 30 to be a predetermined value or more. This configuration is realized, for example, by including a counter switch or an encoder switch that operates according to the rotation amount of the opening / closing device 34 in the opening direction, a timer switch that operates according to the rotation time of the opening / closing device 34 in the opening direction, and the like.

  In the next step 6, the opening / closing machine 34 in the opening / closing drive device 30 is stopped.

According to the control operation, when the opening / closing body 10 is normally closed (the state shown in FIG. 5A), for example, when the feeding stop means 40 malfunctions due to a catch or the like, the malfunction may be caused. Tension is generated in the flexible long member 41 (the state shown in FIG. 5B), and the tension is sensed by the tension sensing means 43, and the opening / closing machine 34 in the opening / closing drive device 30 is moved in the opening direction in response to the sensed signal. It rotates by a predetermined amount.
Therefore, the opening / closing body 10 is opened (the state shown in FIG. 5C), the flexible long member 41 is loosened, and the locked state of the feeding stop means 40 is released.
Therefore, the opening / closing body 10 can be quickly closed when there is a next closing signal without requiring an operation such as manually releasing the feeding stop means 40.

Further, when the opening / closing body 10 is abnormally closed due to, for example, a chain breakage of the power transmission means 33, the reel device 42 when the feeding speed of the flexible elongate member 41 exceeds a specified value. Accordingly, the feeding of the flexible long member 41 is stopped, and the abnormal sudden closing of the opening / closing body 10 is also stopped (the state shown in FIG. 5B).
Then, the tension of the flexible long member 41 is sensed by the tension sensing means 43, and the opening / closing device 34 in the opening / closing drive device 30 operates in the opening direction in response to the sensing signal. Because of the chain breakage or the like, the winding shaft 32 and the opening / closing body 10 are not transmitted.
Therefore, the opening / closing body 10 is held by the flexible long member 41 and is maintained in a stopped state without releasing the opening / closing body 10 and releasing the locked state of the feeding stop means 40.

  Further, during the closing operation of the opening / closing body 10 (the state shown in FIG. 5A), when the closing direction end of the opening / closing body 10 comes into contact with an obstacle or the like (not shown), the opening / closing body 10 is opposed to the opening / closing body 11. The movable seat plate 12 moves in the opening direction, the movement of the movable seat plate 12 is detected by the seat plate sensing unit 11b, and the opening / closing body 10 operates in the opening direction by a predetermined amount and stops according to the detection signal. .

In the flowchart shown in FIG. 4, if the tension sensing means 43 does not return to the non-sensing state after the above step 6, even if it is determined that the opening operation amount of the opening / closing driving device 30 has become a predetermined value or more, Actually, for example, it is considered that some abnormality has occurred such that the locked state is not released. Therefore, the opening / closing drive device 30 may be prohibited from operating in the closing direction.
More specifically, if the sensing switch 43c does not return to the original state after step 6, for example, the relay for operating the switch 34 in the closing direction is de-energized to open / close the switch. The power is not supplied to the machine 34.
According to this configuration, after the above step 6, when the feeding stop means 40 does not return to the original state due to, for example, a catch or failure (in other words, when the locked state is not released), the drawing is stopped. It is possible to prevent the opening / closing body 10 from being pulled out due to a closing command from the operation unit that is not operated.

  Although not shown, when there is a stop command for stopping the operation of the opening / closing body 10 or an opening command for opening the opening / closing body 10 during the control operation shown in the flowchart of FIG. A predetermined control operation according to the command is performed.

  Next, the opening / closing device 2 shown in FIGS. 6 to 8 will be described. Since the switchgear 2 has a partly changed configuration with respect to the switchgear 1, the detailed description of the same parts as the switchgear 1 is omitted.

  In the opening / closing device 2, the tension sensing means 43 described above is omitted, and the flexible long member 41 is engaged with the movable seat plate 12, so that the seat plate sensing portion 11b that senses the movable seat plate 12 is provided. It functions as a tension sensing means for sensing the tension of the flexible long member 41.

More specifically, as shown in FIG. 7, the flexible long member 41 fed from the reel device 42 is received so as to straddle the lower end portion of the movable seat plate 12 in the opening / closing body thickness direction, The front end side is fixed to a stationary part (for example, the guide rail 20 or the storage part 31) on the opening / closing body opening direction side.
The control during the closing operation of the opening / closing device 2 is substantially the same as the flowchart (see FIG. 4) of the opening / closing device 1, but in step 3, a determination is made according to the sensing signal of only the seat plate sensing unit 11b.

According to the opening / closing device 2 having the above-described configuration, when the opening / closing body 10 is normally closed (the state shown in FIG. 8A), for example, when the feeding stop means 40 malfunctions due to a catch or the like, the error is detected. The tension is generated in the flexible long member 41 by the operation (the state shown in FIG. 8B), and the tension is sensed by the seat plate sensing unit 11b as the tension sensing means, and the opening / closing drive device is in response to the sense signal. The switch 34 at 30 rotates by a predetermined amount in the opening direction.
Therefore, the opening / closing body 10 is opened (state shown in FIG. 8C), the flexible long member 41 is loosened, and the feeding stop means 40 is released.
Therefore, the opening / closing body 10 can be quickly closed when there is a next closing signal without requiring an operation such as manually releasing the feeding stop means 40.

Further, when the opening / closing body 10 is abnormally closed due to, for example, a chain breakage of the power transmission means 33, the reel device 42 when the feeding speed of the flexible elongate member 41 exceeds a specified value. Accordingly, the feeding of the flexible long member 41 is stopped, and the abnormal sudden closing of the opening / closing body 10 is also stopped (the state shown in FIG. 8B).
Then, the tension of the flexible long member 41 is sensed by the seat plate sensing unit 11b as the tension sensing means, and the switch 34 in the opening / closing drive device 30 operates in the opening direction in response to the sense signal. The opening force by the machine 34 is not transmitted to the winding shaft 32 and the opening / closing body 10 due to the chain breakage or the like.
Therefore, the opening / closing body 10 is held by the flexible long member 41 and maintained in a stopped state without the opening / closing body 10 being opened and the feeding stop means 40 being released.

  Further, during the closing operation of the opening / closing body 10 (the state shown in FIG. 8A), when the closing direction end of the opening / closing body 10 abuts against an obstacle (not shown), the opening / closing body 10 is opposed to the opening / closing body 11. Then, the movable seat plate 12 moves in the opening direction, the seat plate sensing unit 11b senses the movement of the movable seat plate 12, and the opening / closing body 10 operates in the opening direction by a predetermined amount and stops in response to the sensing signal.

  Next, the opening / closing device 3 shown in FIGS. 9 and 10 will be described. Since the switchgear 3 is a part of the switchgears 1 and 2 that is partially changed, detailed description of the same parts as the switchgears 1 and 2 is omitted.

The opening / closing device 3 is provided with tension sensing means 43 in the opening / closing device 1 with respect to the opening / closing device 2.
The tension sensing means 43 in the opening / closing device 3 is released and stopped in response to a sensing signal from the seat plate sensing unit 11b, and then the feeding stop means 40 returns to its original state due to a catch or failure. If not (in other words, when the locked state is not released), the opening / closing body 10 is prevented from being pulled out due to a closing command from an operation unit (not shown).

  More specifically, as shown in the flowchart of FIG. 10, after stopping the opening / closing device 34 of the opening / closing drive device 30 in step 6, in the next step 7, a detection signal by the detection switch 43 c of the tension detecting means 43 is generated. It is determined whether or not there is, and if there is the sensing signal, the next step 8 is executed, otherwise, step 8 is bypassed.

In step 8, the operation of the switch 34 in the closing direction is prohibited.
More specifically, after step 6, when the feeding stop means 40 does not return to the original state due to, for example, a catch or a failure (in other words, when the locked state is not released). For example, the relay for operating the opening / closing machine 34 in the closing direction is set in a non-excited state so that the opening / closing body 10 does not perform the closing operation even if there is a closing command from an operation unit (not shown).

  According to the opening / closing devices 2 and 3, as a preferred example of holding the movable seat plate 12 by the flexible elongated member 41, the flexible elongated member 41 forms the opening / closing body thickness at the lower end portion of the movable seat plate 12. The tip of the flexible elongate member 41 is fixed to the stationary part on the open direction side, but as another example, the tip of the flexible elongate member 41 is received. It is also possible to adopt a configuration in which the portion is fixed to the movable seat plate 12.

  Moreover, according to the said embodiment, although the opening / closing apparatus of the type which winds up and unwinds the opening / closing body 10 with the winding shaft 32 was shown, as an other example, without opening up the opening / closing body 10, the opening direction side It is also possible to configure an opening / closing device (for example, an overhead door) of the type housed in

  Further, according to the above embodiment, a shutter curtain formed by connecting a plurality of slats as an example of the opening / closing body 10 is shown. However, as another example of the opening / closing body 10, a plurality of pipes are connected in the opening / closing direction. Or a combination of one or more panels, sheets or nets in the opening / closing direction, or a combination of slats, panels, pipes, sheets, nets, etc. It is possible to set it as an aspect.

  Further, according to the illustrated example, the flexible long member 41 is formed in a substantially long strip shape, but as another example, it can be formed in a string shape, a wire shape, or the like.

  Further, according to the illustrated example, the feeding stop means 40 is exposed to the outside. However, as another preferred example, the feeding stop means 40 can be included in the guide rail 20.

  Further, according to the flowchart shown in FIG. 10, when the tension sensing means 43 does not return to the non-sensing state, only the operation in the closing direction of the opening / closing drive device 30 is prohibited. It is also possible to prohibit the bidirectional operation of the opening / closing drive device 30.

It is a front view which shows an example of the switchgear concerning this invention. It is a principal part side view which shows the structure of the switchgear. It is a perspective view which shows an example of a feeding stop means. It is a flowchart which shows the control operation of the switchgear. It is operation | movement explanatory drawing of the switchgear, (a) is the state which the opening / closing body is closing operation, (b) is the state which the closing operation of the opening / closing body stopped by the tension | tensile_strength of a flexible elongate member, (c) Shows a state in which the flexible long member is loosened by opening the opening / closing body. It is a front view which shows the other examples of the switchgear concerning this invention. It is a principal part side view which shows the structure about the other examples of the switchgear. It is operation | movement explanatory drawing in the other examples of the switchgear, (a) is the state which the opening-closing body is closing operation, (b) is the state which the closing operation of the opening-closing body stopped by the tension | tensile_strength of a flexible elongate member, (C) has each shown the state which loosens the flexible elongate member by opening-closing the opening-closing body. It is a principal part side view which shows the structure about the other examples of the switchgear concerning this invention. It is a flowchart which shows the control operation of the other example of the switchgear.

Explanation of symbols

1, 2, 3: Opening / closing device Opening / closing body 10
Opening / closing body 11 Seat plate sensing part 11b
Movable seat 12 Open / close drive device 30
Opening and closing machine 34 feeding stop means 40
Flexible long member 41 Reel device 42
Tension sensing means 43 movable pressing member 43a
Energizing means 43b sensing switch 43c

Claims (5)

An opening / closing body that can be opened and closed while sliding, an opening / closing drive device that opens and closes the opening / closing body by retracting and retracting the opening / closing body, and a flexible long member supported by a stationary part A feeding stop means for stopping the feeding of the flexible long member when the feeding speed is equal to or higher than a specified value and releasing the stopped state by loosening of the flexible long member; In an opening / closing apparatus that holds the lower side of the opening / closing body by a flexible long member and prevents sudden closing of the opening / closing body above the specified value,
Tension sensing means for sensing the tension of the flexible elongate member when the feeding is stopped is provided, and the opening / closing drive device is operated in the opening direction on condition that there is a sensing signal from the tension sensing means. An opening and closing device characterized by that.   The tension sensing means includes an urging means for urging the flexible elongate member in the crossing direction to maintain it in a non-linear shape, and the flexible elongate member is urged by the urging means. 2. The switchgear according to claim 1, further comprising a sensing switch that senses movement in a direction opposite to the direction and outputs a sensing signal.   The tension sensing means is provided with a movable seat plate that is slidable relatively upward on the lower end side of the opening / closing body, and a seat plate sensing unit that senses an upward slide of the movable seat plate, 2. The switchgear according to claim 1, wherein the flexible elongated member is engaged with the movable seat plate before sliding in the direction.   After the opening / closing drive device is operated in the opening direction on the condition that there is a detection signal from the tension sensing means, the opening / closing drive device is operated in the opening direction when the opening operation amount exceeds a predetermined value. The switchgear according to any one of claims 1 to 3, wherein the switch is stopped.   Operation of the opening / closing drive device in the closing direction when the tension detection device does not return to the non-sensing state after the opening / closing drive device is operated in the opening direction on condition that a detection signal is received from the tension sensing device. The switchgear according to any one of claims 1 to 4, wherein the switch is prohibited.

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