JP2013256827A - Opening and closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To further appropriately recognize abnormality of electrical wiring connected to a contact point that opens and closes according to occurrence of a predetermined event.SOLUTION: An opening and closing device comprises: an opening and closing body 10 capable of performing closing operation; a contact point 13a provided so as to open and close according to occurrence of a predetermined event; and a control section 60 electrically wired to the contact point 13a. The opening and closing device configured such that the control section 60 performs predetermined control in response to opening/closing of the contact point 13a further comprises: a first resistor 13b electrically wired between the contact point 13a and the control section 60 so as to be connected to the contact point 13a in parallel; and a second resistor 13c electrically wired between the contact point 13a and the control section 60 so as to be connected to the contact point 13a in series. The control section 60 comprises resistance measurement means 61 for measuring a combined resistance value of the contact point 13a, the first resistor 13b and the second resistor 13c and performs the predetermined control according to the combined resistance value measured by the resistance measurement means.

Description

  The present invention relates to an opening / closing device for closing an opening / closing body, and more particularly to an opening / closing device configured to perform predetermined control in accordance with obstacle detection or the like.

Conventionally, in this type of invention, as disclosed in Patent Document 1, for example, an opening / closing body (shutter curtain 4) that opens and closes and an obstacle on the moving path of the opening / closing body are detected and a detection signal is output. And a control unit (wired obstacle sensing device 17) that performs an avoidance operation according to a sensing signal of the obstacle sensing means, and the obstacle sensing means is configured to be a movable seat at the lower end of the opening / closing body. There is a switchgear constituted by a contact (seat plate switch 9) that is closed when the plate is raised and a resistor (115) connected in parallel to the contact.
According to this switching device, when the contact is open in a normal switching operation state, the combined resistance value of the contact and the resistance measured on the control unit side is close to the resistance value of the resistance. Therefore, it can be determined that the current state is normal.
In addition, when the open / close body during the closing operation comes into contact with an obstacle, the contact is closed, so that a combined resistance value of the contact and the resistance measured on the control unit side becomes a predetermined value or less. Thus, it can be determined that the vehicle is in the obstacle contact state.
Further, when a disconnection occurs on the control unit side with respect to the resistance, the combined resistance value of the contact and the resistance measured on the control unit side becomes a value larger than a predetermined value. The disconnection can be determined.

  However, in the prior art, when the disconnection occurs on the control unit side with respect to the resistance, and the disconnection portion is short-circuited, the combined resistance value of the contact and the resistance measured on the control unit side is Since the contact is almost the same as the closed state, this short-circuit state cannot be recognized, and there is a possibility that the opening / closing body cannot be closed due to erroneous recognition of obstacle detection.

JP 2007-138394 A

  The present invention has been made in view of the above-described conventional circumstances, and in an opening / closing device having a contact provided to open and close in response to the occurrence of a predetermined event such as a seat plate switch, the electrical connected to the contact is provided. It is an object of the present invention to more appropriately recognize an abnormality in wiring and to perform appropriate control according to the type of abnormality.

  One means for solving the above-described problem includes an opening / closing body capable of closing operation, a contact provided to open and close in response to occurrence of a predetermined event, and a control unit electrically wired to the contact, Placed in an opening / closing device in which the control unit performs predetermined control in accordance with the opening / closing of the contact, and is electrically wired between the contact and the control unit so as to be connected in parallel to the contact A first resistor and a second resistor electrically connected between the contact and the control unit so as to be connected in series with the contact; and the control unit includes the contact, the first resistor, and the second resistor. Resistance measuring means for measuring a combined resistance value of two resistors is provided, and predetermined control is performed according to the combined resistance value measured by the resistance measuring means.

  Since the present invention is configured as described above, an electrical switch connected to the contact is provided in a switchgear having a contact provided to open and close in response to the occurrence of a predetermined event such as a seat plate switch. The object of the present invention can be achieved, such as more appropriately recognizing an abnormality in the wiring and enabling appropriate control according to the type of abnormality.

It is a front view which shows typically an example of the switchgear concerning this invention. It is an electrical wiring diagram which shows an example of a switch circuit. It is a flowchart which shows an example of the operation | movement by a control part. It is a principal part notch front view of the lower end side of an opening-closing body. It is the (V)-(V) sectional view taken on the line in FIG. It is a principal part front view of the other examples of the switchgear concerning the present invention.

The first feature of the present embodiment includes an opening / closing body capable of closing operation, a contact provided to open and close in response to occurrence of a predetermined event, and a control unit electrically wired to the contact, Placed in an opening / closing device in which the control unit performs predetermined control in accordance with the opening / closing of the contact, and is electrically wired between the contact and the control unit so as to be connected in parallel to the contact A first resistor and a second resistor electrically connected between the contact and the control unit so as to be connected in series with the contact; and the control unit includes the contact, the first resistor, and the second resistor. Resistance measuring means for measuring the combined resistance value of the two resistors is provided, and predetermined control is performed according to the combined resistance value measured by the resistance measuring means.
According to this configuration, it is possible to appropriately determine whether the contact is in the closed state or the open state based on the combined resistance value measured by the resistance measuring unit, and perform predetermined control according to the determination. Can do.
In addition, when the electrical wiring from the resistance measuring unit is disconnected from the first resistance, the combined resistance value measured by the resistance measuring unit is larger than that in the contact closed state and the contact open state, It is determined that the disconnection is abnormal, and predetermined control corresponding to the determination can be performed.
In addition, when a short circuit occurs in the electrical wiring from the resistance measuring unit rather than the first resistance, the combined resistance value measured by the resistance measuring unit is smaller than in the contact closed state and the contact open state, It is determined that the short circuit is abnormal, and predetermined control corresponding to the determination can be performed.
Therefore, it is possible to more appropriately recognize an abnormality in the electrical wiring connected to the contact and to distinguish the type of the abnormality.

  As a second feature, in order to more appropriately recognize an abnormality in the electrical wiring connected to the contact, the control unit closes the contact when the combined resistance value is within the first range. If the combined resistance value is within a second range that is greater than the first range, it is determined that the contact is open, and the combined resistance value is not within the first range. If it is not within the second range, it is determined to be abnormal, and predetermined control is performed depending on which of these determinations is made.

  As a third feature, in order to more appropriately recognize an abnormality in the electrical wiring connected to the contact point, when the control unit determines that the abnormality is present, the combined resistance value is less than the first range. Is determined to be within a small third range, and further, it is determined whether the combined resistance value is within a fourth range that is larger than the second range, and predetermined control is performed according to these determinations. Do.

  As a fourth feature, in order to perform appropriate control according to the type of abnormality of the electrical wiring, the control unit is configured so that the combined resistance value is within a third range that is smaller than the first range. Then, it is determined that a short circuit has occurred on the control unit side with respect to the first resistor and the second resistor, and predetermined control is performed.

  As a fifth feature, in order to perform appropriate control according to the type of abnormality of the electrical wiring, the control unit is configured so that the combined resistance value is within a fourth range that is larger than the second range. Then, it is determined that a disconnection has occurred on the control unit side with respect to the first resistor and the second resistor, and predetermined control is performed.

  As a sixth feature, one or both of the first resistor and the second resistor are detachably provided in order to improve maintainability and the like.

  As a seventh feature, in order to improve manufacturability and further maintainability, one terminal and the other terminal of the contact are respectively detachable from the electric wiring on the control unit side, A second resistor is detachably connected between the other terminal and the control unit side electric wiring, and an electric wire is detachably connected between the other terminal and the control unit side electric wiring. The second resistor and the electric wire were bundled and integrated.

  As an eighth feature, in order to improve the reliability of obstacle detection by the movable seat plate, the opening / closing body is connected to the opening / closing body main body and to move in the opening / closing direction relative to the opening / closing body main body. A movable seat plate that is configured to contact a seating target portion when the open / close body is fully closed, and the predetermined event is generated by the movable seat plate facing the open / close body body. It is a move.

  As a ninth feature, as a specific aspect with better maintainability, the first resistance and the second resistance are arranged on the end side in the closing direction of the opening / closing body body.

As a tenth feature, as a specific aspect in which the operability of the switchgear is good, the electric wire connected to the first resistor and the second resistor is wound up or drawn out at the stationary part on the opening / closing body opening direction side. The first resistor and the second resistor are disposed at positions where the reel device is not wound around the reel device in a range in which the opening / closing body operates from the fully open position to the fully closed position.
Here, the immovable part may be an immovable part with respect to the opening / closing body that opens and closes. The immovable part includes a storage case for storing the opening / closing body on the opening direction side, and the opening / closing body in the lateral width direction. The guide rail etc. which guide to an opening-and-closing direction on the edge part side of this are included.

  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.

  Next, a preferred embodiment embodying the above embodiment will be described in detail with reference to the drawings.

  The opening / closing device 1 described below is disposed in or inside an opening portion or inside of a housing such as a house, building, warehouse, factory, underground mall, tunnel, or vehicle loading platform, and opens and closes the opening portion or opens a space inside the housing. The present invention can be applied as a shutter device that partitions and opens, and as a particularly preferable aspect, it is an example applied to a fire prevention shutter device that is automatically closed in an emergency such as a fire to prevent the spread of flames and smoke.

  As shown in FIG. 1, the opening / closing device 1 surrounds an opening / closing body 10 that can be closed by its own weight by sliding an end portion in the closing direction, and an opening / closing body that surrounds an end of the opening / closing body 10 in the width direction (left-right direction in FIG. 1). A guide rail 20 that guides in the direction, a winding device 30 that winds and unwinds the opening and closing body 10, and a control unit 60 that controls the winding device 30, and the opening and closing body 10 during the closing operation is an obstacle X When the contact is made, appropriate control such as stopping or reversing the closing operation of the opening / closing body 10 is performed.

  The opening / closing body 10 is an opening / closing body main body 11 and a movable seat plate 12 connected to the lower end side of the opening / closing body main body 11 and movable in the opening / closing direction relative to the opening / closing body main body 11. A movable seat plate 12 capable of abutting against a seating target site P, and a contact point 13a is provided on the closing direction end of the opening / closing body 10 by moving the movable seat plate 12 opposite to the opening / closing body body 11 in the opening direction. It has a switch circuit 13 that opens and closes.

  The opening / closing body main body 11 is formed 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. On the lower end side of 11, a concave frame-shaped fixed seat plate 11 b that opens continuously in the width direction of the opening / closing body is provided (see FIG. 5). In this fixed seat plate 11b, a swing member 11c is provided with its swing fulcrum supported on one end side in the opening / closing body thickness direction, and from the swing member 11c in the fixed seat plate 11b. On the lower side, a long movable seat plate 12 extending in the opening / closing body width direction is engaged so as to slide in the vertical direction.

The swing member 11c is rotated by the inner wall of the fixed seat plate 11b in the opening / closing body 11 so that the swing member 11c is pressed by the movable seat plate 12 and swings in the opening / closing body opening direction, and swings in the opening / closing body closing direction by its own weight. It is supported freely.
The swing member 11c is provided over substantially the entire length in the opening / closing body width direction so as to abut against the movable seat plate 12 at any position in the opening / closing body width direction.

  The movable seat plate 12 is a member that extends over substantially the entire length in the opening / closing body width direction, protrudes downward from the lower end of the opening / closing body main body 11, and can freely move up and down by a predetermined amount relative to the opening / closing body main body 11. Moving. The movable seat plate 12 of the illustrated example is configured by a single or a plurality of members and has a substantially inverted T-shaped longitudinal section, and the upper end portion of the movable seat plate 12 can be slid up and down within the fixed seat plate 11b of the opening / closing body 11. Match.

  The switch circuit 13 is provided on the lower end side of the opening / closing body main body 11, and includes a limit switch A fixed in the fixed seat plate 11b at the lower end of the opening / closing body main body 11, and an electric wiring B drawn from the limit switch A. To do.

  The limit switch A includes a switch main body a1 including a contact 13a and an actuator a2 that opens and closes (turns on and off) the contact 13a by a movement relative to the switch main body a1, and the actuator a2 is inclined downward in the opening / closing body thickness direction. The switch main body a <b> 1 is fixed to the opening / closing body main body 11.

  The actuator a2 is formed in an elongated shape from an elastically deformable metal material such as a spring material, and its one end side (base end side) is fixed to the opening / closing body main body 11 via the bracket 11e and the other end side. (Free end side) is disposed so as to face the upper surface of the tip end side of the swinging member 11c.

The contact point 13a is provided so as to be closed (on) by being pushed by a portion closer to the one end side than the bent portion a21 in the actuator a2.
More specifically, when the movable seat plate 12 rises relative to the opening / closing body main body 11, the swinging member 11c swings upward along with the lifting, and the actuator a2 pushes against the swinging member 11c. When the contact 13a is pushed by the swinging portion, the contact 13a is closed.
When the movable seat plate 12 is lowered relative to the opening / closing body main body 11 from this state, the swinging member 11c swings downward along with the lowering, and the actuator moves in the reverse direction along with the swinging. Since it is returned, the contact 13a is opened.
As another example, conversely to the above, it is possible to adopt a configuration in which the contact 13a is changed from the closed state to the open state by the upward movement of the movable seat plate 12 relative to the open / close body 11.

As shown in FIG. 4, the electrical wiring B is extended from the limit switch A in the opening / closing body width direction, and penetrates upward through the top wall of the fixed seat plate 11b so as to cover the outer upper surface of the fixed seat plate 11b. Then, it is guided in the width direction of the opening / closing body, passes through the space in the wiring protection members 14, 15, is inserted through the wiring holder 16, and is guided upward along the surface of the opening / closing body 11.
Then, the electrical wiring B is fed out from the reel device 70 with the closing operation of the opening / closing body 10 and wound around the reel device 70 with the opening operation of the opening / closing body 10. When the opening / closing body 10 is fully opened, not all the electrical wiring B is wound around the reel device 70, and a part of the electrical wiring B extends downward so as to hang down. The amount of extension is set so as not to obstruct the passing material that passes through the opening.
The electrical wiring B includes harnesses H1 and H2, electric wires, and connectors 13h and 13f that detachably connect them, and constitutes a switch circuit 13 to be described later.

One wiring protection member 14 is fixed to the end of the fixed seat 11b in the opening / closing body width direction, covers and protects the electric wiring B, and serves as a touch plate for sensing the upper limit when the opening / closing body 10 is fully opened. Also works.
As shown in FIG. 5, the wiring protection member 14 is provided so as to cover the electric wiring B along the upper surface of the fixed seat plate 11b having a substantially inverted T-shaped cross section from above, and is fixed to the fixed seat plate 11b. And has a flange portion 14a protruding from the fixed seat plate 11b in the opening / closing body thickness direction. The flange portion 14 a is provided so as to be detected by a limit switch (not shown) in the winding device 30.

The other wiring protection member 15 secures a space for inserting the electric wiring B between the outer upper surface of the fixed seat plate 11b. A wiring holder 16 to be described later is fixed to the outer upper surface of the wiring protection member 15. The wiring protection member 15 is detachably secured to the opening / closing body main body 11 with a fastening tool (not shown) (for example, a bolt or a screw). Therefore, at the time of maintenance or the like, the wiring protection member 15 can be removed, and the connection portions (connectors 13h and 13f) such as the harnesses H1 and H2 and electric wires can be exposed to the outside.
Although not shown in FIG. 4, the first resistor 13 b and the second resistor 13 c are also located in the space inside the wiring protection member 15 and are covered and protected by the wiring protection member 15.

  The wiring holder 16 is a member that is fixed to the upper portion of the wiring protection member 15 and has a hollow inside. According to the illustrated example, the wiring holder 16 is a substantially rectangular parallelepiped member. The wiring holder 16 is inserted through the through hole in the wall 16a (the wall on the near side in the example of FIG. 4) in the thickness direction of the opening / closing body, and guides the electric wiring B upward. ing. The electrical wiring B has a knot b1 larger than the through hole on the movable seat plate 12 side than the wall portion 16a, and is pulled out from the through hole to the outside in the opening / closing body thickness direction by the knot b1. The connectors 13h, 13f, etc. are prevented from coming off. The first resistor 13b and the second resistor 13c (harnesses H1 and H2 and connectors 13h and 13f) are located closer to the limit switch A than the through hole and the knot b1 of the wiring holder 16.

  The switch circuit 13 constituted by the limit switch A and the electric wiring B will be described in more detail. The switch circuit 13 is connected in parallel to the contact 13a included in the limit switch A and the contact 13a. The first resistor 13b electrically connected between the contact 13a and the control unit 60 in this manner and the electrical connection between the contact 13a and the control unit 60 so as to be connected in series to the contact 13a. And a second resistor 13c connected to (see FIG. 2). In the example of the switch circuit 13 illustrated in FIG. 2, the resistance value between the terminals of the first resistor 13 b is measured by the resistance measuring unit 61 and is electrically connected to the control unit 60. The resistance value is measured by, for example, a circuit that performs voltage comparison using a comparator.

One terminal and the other terminal of the contact 13a are detachably connected to the electric wiring on the control unit 60 side.
More specifically, the electric wire 13d is connected to one terminal (in FIG. 2) of the contact 13a, and the electric wire 13e is connected to the other terminal of the contact 13a. And the connector 13f is connected to the control part 60 side of these electric wires 13d and 13e.
The connector 13f is configured such that the half half 13f1 and the other half 13f2 are detachably connected, and the wires 13d and 13e are connected to the half half 13f1, and the other half 13f2 is electrically connected to one of the wires 13d. Thus, the second resistor 13c is connected to the other electric wire 13e, and the electric wire 13g is connected thereto. The second resistor 13c and the electric wire 13g are bundled and integrated by being accommodated in a vinyl electric conduit (not shown).
And the connector 13h is connected to the control part 60 side of the 2nd resistance 13c and the electric wire 13g. The connector 13h is configured such that the half part 13h1 and the other half part 13h2 are detachably connected, and the second resistor 13c and the electric wire 13g are connected to the half part 13h1, and the second half 13h2 has a second resistance. An electric wire 13i is connected to 13c, and an electric wire 13j is connected to be connected to an electric wire 13g. The non-connector 13h side of the wires 13i and 13j is connected to the resistance measuring means 61 in the control unit 60, and the first resistor 13b is connected between the wires 13i and 13j.

Therefore, according to the switch circuit 13, the second resistor 13c and the electric wire 13g (specifically, the second resistor 13c, the electric wire 13g, the half half 13h1 of the connector 13h, the other half 13f2 of the connector 13f, and the electric wire not shown) Tube) can be handled as an integral harness H1.
Similarly, the contact 13a (specifically, the contact 13a, the electric wire 13d, the electric wire 13e, and the half half 13f1 of the connector 13f) can also be handled as an integrated harness H2.

  If the harness H1 is omitted from the switch circuit 13 having the above configuration and the harness H2 is directly connected to the other half 13h2 of the connector 13h, the configuration can be made substantially the same as that of the prior art. That is, according to the switch circuit 13 having the above-described configuration, the conventional switch circuit is configured in this embodiment by mounting the harness H1 between the other half 13h2 of the connector 13h of the conventional switch circuit and the harness H2. The switch circuit 13 can be easily changed.

  Further, the control unit 60 side portion of the electric wires 13i and 13j in the switch circuit 13 is inserted and bundled into a vinyl electric wire tube to form the electric wiring B, and along the opening / closing body 10 surface outside the guide rail 20. Then, it is guided into the storage case 31 of the winding device 30 and wound around the winding body of the reel device 70. As another example, the electric wiring B can be inserted into the guide rail 20 and guided into the storage case 31.

  The guide rail 20 is a substantially U-shaped member that surrounds the widthwise end of the opening / closing body 10, and a seating target site P (for example, a floor surface, the ground, a frame member, etc.) seated by the opening / closing body 10. It arrange | positions over between the winding apparatuses 30 (refer FIG. 1).

  The winding device 30 includes a substantially rectangular parallelepiped storage case 31 that is long in the width direction of the opening / closing body, a winding shaft 32 that winds and unwinds the opening / closing body 10 in the storage case 31, and the winding shaft 32. An opening / closing device 40 that rotates and brakes the power via a power transmission means 33 such as a chain and a sprocket, and an automatic closing device 50 that causes the opening / closing body 10 to be closed by its own weight by performing a brake releasing operation. And a reel device 70 for winding and unwinding the electric wires 13i and 13j of the switch circuit 13 (see FIG. 1).

  The winding shaft 32 is a long cylindrical member extending in the opening / closing body width direction, and is supported so as to rotate in both directions with respect to the storage case 31 which is a non-moving portion. The winding shaft 32 has a mode in which a winding body around the fixed shaft fixed to the stationary part is rotated, a mode in which the winding body is supported so as to be directly rotatable with respect to the stationary part, A mode in which the body is rotatably supported by a pair of lower rollers, a mode in which the opening / closing body 10 guided in a substantially horizontal direction by the guide shaft is wound around the winding body (biaxial winding shaft), etc. Is possible.

The opening / closing machine 40 is provided with an exposed operating body 41 in a well-known opening / closing machine disclosed in, for example, Japanese Utility Model Laid-Open No. 01-118084, and is supported by a stationary part such as the storage case 31 via a bracket or the like.
More specifically, the opening / closing machine 40 is restrained by a biasing force of an internal biasing member and released by an operation of the operating body 41, and the brake mechanism 42 is restrained by the brake mechanism 42. The drive shaft 43 that is opened and a rotational drive source 44 that rotates the drive shaft 43 (for example, a rotary electric motor, a motor that rotates by hydraulic pressure, hydraulic pressure, pneumatic pressure, or the like) are provided integrally. The rotational force of the shaft 43 is transmitted to the take-up shaft 32 via the power transmission means 33.

  The automatic closing device 50 is supported by the opening / closing device 40 via a bracket or the like, and an operating member 41 in the opening / closing device 40 is moved in a restraining direction or a release direction (not shown) by an advancing / retreating member (not shown) that moves forward and backward by an electrical signal from the control unit 60. In the reverse direction, the brake mechanism 42 is restrained or released. The power source of the automatic closing device 50 can be a commercial power source, but is switched to a battery power source (not shown) when there is an emergency signal at the time of a disaster so that the power source can be operated even in the event of a power failure.

The control unit 60 is configured by a programmed logic circuit such as a microcomputer circuit or a sequencer, or a wired logic circuit such as an electronic circuit or a relay circuit, etc., and an operation unit (operation BOX, remote controller, computer that generates an operation signal, mobile phone) Brake mechanism 42 by rotating the rotation drive source 44 in the forward or reverse direction according to a signal input from a terminal, a start sensor, etc., or by operating the automatic closing device 50 in response to an emergency signal in the event of a fire or the like. Is released and the opening / closing body 10 is lowered by its own weight.
Further, the control unit 60 includes a resistance measuring unit 61 that measures the combined resistance value of the switch circuit 13, and according to the measured value of the resistance measuring unit 61, for example, the closing operation of the opening / closing body 10 is stopped, Predetermined control is performed, such as reversing after the opening / closing body 10 is stopped, or performing processing in accordance with an abnormality of the switch circuit 13.

  The resistance measuring means 61 is a circuit that measures the combined resistance value of the switch circuit 13 and outputs an electrical signal corresponding to the measured value. The control unit 60 performs predetermined control according to the combined resistance value grasped by the electrical signal.

  The reel device 70 also includes a winding body that is rotatably supported so as to wind and unwind the electric wiring B including the electric wires 13i and 13j of the switch circuit 13, and the winding body in the winding direction. An urging means (for example, a coil spring spring) for urging and an output terminal for outputting an electric signal transmitted by the electric wires 13i, 13j are provided, and the electric signal output from the output terminal is transmitted to the control unit 60. So that it is electrically wired.

Next, an example of the control operation by the control unit 60 will be described in detail with reference to FIG.
When receiving an emergency signal such as at the time of a disaster, the control unit 60 operates the automatic closing device 50 to release the brake mechanism 42 and lowers the opening / closing body 10 by its own weight.
In step 1, it is determined whether or not the combined resistance value of the switch circuit 13 is within the first range. If it is within the first range, the process proceeds to step 2; otherwise, the process proceeds to step 1a. To jump.
The first range is a numerical range including the resistance value of the entire switch circuit 13 when the contact 13a is closed in a state where there is no disconnection or short circuit, for example, the first resistor 13b connected in parallel An appropriate resistance value width that includes the combined resistance value of the second resistor 13c and that does not cause malfunction may be set. According to the illustrated example, the first range is set to a range of 20 to 30 kΩ.

In step 2, it is determined that the contact point 13a is closed, and predetermined control is performed in accordance with this determination, and then the process returns to step 1.
The predetermined control in this step 2 is control for the end of the opening / closing body 10 in the closing direction contacting the obstacle X. In this embodiment, the automatic closing device 50 is moved to the return position (the brake mechanism 42 is moved). A signal to make a restraint state) is transmitted.
Therefore, when the opening / closing body 10 is in the closing operation, the operation of the automatic closing device 50 in the return direction causes the brake mechanism 42 to change from the open state to the restrained state, and the closing operation of the opening / closing body 10 stops. If the closing direction end of the opening / closing body 10 is already in contact with the obstacle X and the closing operation of the opening / closing body 10 is stopped halfway, the stopped state is continued.
Other examples of the predetermined control in step 2 include a mode in which the opening / closing body 10 is reversed by a predetermined amount after it is stopped, or an alarm output indicating that an obstacle has been detected when the opening / closing body 10 is stopped (generation of light or sound). In addition, it is also possible to adopt a mode in which an output of an electrical signal or the like is performed.

In Step 1a, it is determined whether or not the combined resistance value of the switch circuit 13 is within the second range. If it is within the second range, the process proceeds to Step 2a. If not, Step 1b is performed. Jump to processing.
The second range in step 1a is a numerical range including the resistance value of the entire switch circuit 13 when the contact 13a is opened in a state where there is no disconnection or short circuit, for example, only the first resistor 13b. An appropriate resistance value width that includes a resistance value and that does not cause malfunctions may be set. According to the illustrated example, the second range is a range of 40 to 60 kΩ.

In step 2a, it is determined that the contact point 13a is open, predetermined control (control different from that in step 2) is performed in accordance with this determination, and then the process returns to step 1.
The predetermined control in step 2a is control on the assumption that the closing direction end of the opening / closing body 10 is not in contact with the obstacle X. For example, when the opening / closing body 10 is in the closing operation, When the operation of the automatic closing device 50 and the released state of the brake mechanism 42 are maintained, the closing operation of the opening / closing body 10 is continued, and when the closing operation of the opening / closing body 10 is stopped halfway, the automatic closing device By changing 50 from the return state to the operating state, the brake mechanism 42 is changed from the restrained state to the opened state, and the closing operation of the opening / closing body 10 is resumed.
An alarm sound or flashing light may be emitted so as to notify that the opening / closing body 10 is being closed.

  In step 1b, it is determined that there is an abnormality, and the process proceeds to the next step 2b. That is, according to the steps 1, 1a and 1b, if the combined resistance value of the switch circuit 13 is not within the first range and not within the second range, it is determined that there is some abnormality, and the next step The process proceeds to 2b.

In step 2b, it is determined whether the combined resistance value of the switch circuit 13 is within a third range that is smaller than the first range. If within the third range, the process proceeds to the next step 3b, and so on. If not, the process proceeds to step 1c.
Here, the third range is a numerical range of the entire switch circuit 13 when the electric wires 13i and 13j are short-circuited by the control unit 60 rather than the first resistor 13b and the second resistor 13c. An appropriate resistance value width may be set that has a resistance value width in a range smaller than any of the resistance values of the resistor 13b and the second resistor 13c and that does not cause malfunction. According to the illustrated example, the third range is a range of 0 to 10 kΩ.

In step 3b, it is determined that there is a short circuit abnormality, and predetermined control is performed according to this determination, and then the process proceeds to step 4b.
That is, when the electric wires 13i and 13j are short-circuited on the control unit 60 side with respect to the first resistor 13b and the second resistor 13c, or when the electric wires 13i and 13j are disconnected and the disconnected portion is short-circuited, Since the resistance value measured by the resistance measuring means 61 is significantly lower than the first range and the second range and falls within the third range, this causes the occurrence of the short circuit abnormality as described above. Can be judged.
Further, the predetermined control in step 3b is, for example, an output of an alarm (including generation of light or sound, output of an electrical signal, etc.) that the opening / closing body 10 is stopped and / or a short circuit abnormality has occurred. It is sufficient to control this.

In the next step 4b, the process waits for the restoration signal, and returns to step 1 if the restoration signal is received.
Here, the recovery signal is a signal that is issued to re-drop the abnormally stopped opening / closing body 10, and is usually a signal that is issued after repairing or replacing an abnormal part such as a short circuit or disconnection. This restoration signal is, for example, a signal issued by a special operation such as an operation of simultaneously pressing an open button and a close button of an operation unit (not shown), a signal issued by an operation of a restoration dedicated switch (not shown), or a remote operation. What is necessary is just to make it the signal etc. which are automatically detected that the repair and replacement | exchange of an abnormal part and a signal were completed, etc.
As another example, the input of the restoration signal as described above is omitted, and for example, it is recognized by the state of the control circuit or other means that a normal state other than an abnormality has occurred after repair, etc. After the recognition, a recovery process (a process for returning to step 1) may be performed.

In Step 1c, it is determined whether the combined resistance value of the switch circuit 13 is within a fourth range that is larger than the second range. If within the fourth range, the process proceeds to the next Step 2c. Otherwise, the process proceeds to step 1d.
Here, the fourth range is a numerical value range of the entire switch circuit 13 when the electric wire 13i, 13j is disconnected by the control unit 60 rather than the first resistor 13b and the second resistor 13c. It is only necessary to set an appropriate resistance value width that is larger than any of the resistance values of the resistor 13b and the second resistor 13c and that does not cause malfunction. According to the illustrated example, the fourth range is a range from 60 kΩ to infinity.

In step 2c, it is determined that the disconnection is abnormal, and predetermined control corresponding to this determination is performed, and then the process proceeds to step 4b.
That is, when one of the electric wire 13i and the electric wire 13j is disconnected on the control unit 60 side from the first resistor 13b and the second resistor 13c, or when the connection portion of the electric wires 13i and 13j is disconnected, the resistance Since the resistance value measured by the measuring means 61 is significantly larger than the first range and the second range and falls within the fourth range, this causes the disconnection abnormality as described above. Can be judged.
The predetermined control in step 2c is, for example, an alarm output (including generation of light or sound, output of an electrical signal, etc.) indicating that the opening / closing body 10 is stopped and / or a disconnection abnormality has occurred. Preferably, the control is different from the control content of step 3b and step 1d described later so that the type of abnormality can be distinguished.

In step 1d, it is determined that the abnormality is not the short-circuit abnormality and the disconnection abnormality described above, and after performing predetermined control, the process proceeds to step 4b.
That is, for example, the combined resistance value is not the first range, the second range, the third range, or the fourth range due to malfunction of the control circuit due to noise or the like, or other causes. If this is the case, step 1d is executed.
The predetermined control in step 1d is, for example, an output of an alarm (including generation of light or sound, output of an electrical signal, etc.) that the opening / closing body 10 is stopped and / or other abnormality has occurred. The control may be performed, and preferably, the control is different from the control content of step 3b and step 2c described later so that the type of abnormality can be distinguished.

Therefore, according to the flowchart shown in FIG. 3, when there is no abnormality in the switch circuit 13, the closing operation of the opening / closing body 10 is continued, or the opening / closing body 10 is opened in response to the detection of an obstacle (opening / closing of the contact 13 a) Appropriate control such as stopping or re-lowering the opening / closing body 10 can be performed (see Steps 1 and 2 and 1a to 2a).
When an abnormality occurs, it is determined whether the abnormality is a disconnection abnormality, a short-circuit abnormality, or any other abnormality, and control according to the type of each abnormality can be performed (steps 1b to 3b, 1c-2c, 1d).
Then, when any of the above abnormalities disappears and there is a recovery signal due to the operator's action or the like, it is possible to return to the processing when there is no abnormality described above (see step 4b).

Moreover, according to the switchgear 1 having the above-described configuration, as described above, the conventional switch circuit can be easily set to the present embodiment only by attaching the harness 1.
Further, when a failure of a limit switch including the contact 13a or a contact failure of the second resistor 13c is found in maintenance work or the like, these failure points can be easily found by replacing the harness H1 and / or the harness H2. Can be repaired.

  A preferable control example by the control unit 60 is shown in the flowchart of FIG. 3, but this flowchart appropriately sets each range for determination, control corresponding to each determination, processing order, and the like as necessary. It can be changed.

  Moreover, in the said Example, although the said switch circuit 13 was comprised about the contact 13a opened and closed by the raise facing the opening-and-closing body main body 11 of the movable seat board 12, as an other example, objects, such as an obstruction, are non-contact-sensed. The switch circuit 13 is configured with respect to the contact of a sensor (for example, a photoelectric tube sensor, a pyroelectric sensor, etc.), or the contact that opens and closes according to the amount of rotation of a rotating part of the switch 40 or the like (more specifically, all of the switch body 10). The switch circuit 13 is configured for a contact point of a counter-type limit switch that senses a closed position or a fully opened position based on the amount of rotation of the rotating part), or opens and closes when the load value of the opening / closing body 10 exceeds a predetermined threshold value. The switch circuit 13 is configured for the contacts to be connected, or the switch circuit 13 is configured for the contacts of the mat switch provided in the vicinity of the switchgear 1. Or, it is possible to like or configure the switch circuit 13 the output contacts (not shown) motion sensors, the contacts to open and close in response to the occurrence of a predetermined event constituting the switching circuit 13.

  Moreover, according to the said Example, only the 2nd resistance 13c was comprised so that attachment or detachment was possible among two resistances 13b and 13c, but as both examples, both the 1st resistance 13b and the 2nd resistance 13c can be attached or detached. It is also possible to make the first resistor 13b detachable.

  Moreover, according to the said Example, the 2nd resistance 13c is attached or detached by attachment or detachment of harness H1 which consists of the half half 13h1 of the connector 13h, the other half 13f2 of the connector 13f, the 2nd resistance 13c, and the electric wire 13g. However, as another example, it is also possible to provide a configuration in which connectors are provided at both ends of the second resistor 13c and only the second resistor 13c is attached and detached.

  Further, the first resistor 13b and the second resistor 13c (specifically, the connectors 13h and 13f and the harnesses H1 and H2) can be measured on the electrical wiring by allowing the resistance measuring means 61 to measure the combined resistance value. The arrangement may be arbitrary, but is preferably provided at a position where the opening / closing body 10 is not wound around the reel device 70 in the range from full open to full close (particularly in the full open state), more preferably The opening / closing body 10 is provided on the end side in the closing direction (more preferably, the position of the fixed seat plate 11b and the position near the fixed seat plate 11b).

Further, the configuration for protecting the electrical wiring B on the upper side of the fixed seat plate 11b can be replaced with the wiring protection member 15 or the like, so that the wiring protection member 15 ′ and the holding bracket 17 or the like shown in FIG. .
The wiring protection member 15 ′ is a pipe-shaped wiring protection member that surrounds the electrical wiring B in an annular shape, and is fixed to the upper surface of the fixed seat plate 11b. The wiring protection member 15 ′ includes a base portion fixed to the upper surface of the fixed seat plate 11b and a cover portion fitted into the base portion so as to have a substantially concave cross section. The cover portion is attached and detached for maintenance or the like. Is possible.
The holding bracket 17 is an angle-shaped member, and the wiring holder 16 for inserting and holding the electric wiring B is fixed to the upper surface of the holding bracket 17 along the electric wiring B.
Therefore, even with the protective structure shown in FIG. 6, it is possible to perform maintenance on the connection place (harness H1, connectors 13h, 13f, etc.) of the electric wiring B by attaching / detaching the cover portion of the wiring protection member 15 ′. In addition, as in the above-described embodiment shown in FIG. 5, it is possible to prevent the connectors 13 h and 13 f from being detached due to the tension generated in the electric wiring B due to the engagement between the knot b <b> 1 of the electric wiring B and the wiring holder 16. be able to.

  Moreover, according to the said Example, although the shutter curtain formed by connecting several slats as an example of the opening / closing body 10 was shown, as another example of this opening / closing body 10, a single or several panel, sheet form, etc. were shown. It is also possible to adopt a mode in which objects and nets are arranged in the opening and closing direction, or a mode in which slats, panels, pipes, sheets, nets, etc. are appropriately combined.

DESCRIPTION OF SYMBOLS 1: Opening and closing device 10: Opening and closing body 11: Opening and closing body main body 12: Movable seat board 13: Switch circuit 13a: Contact 13b: 1st resistance 13c: 2nd resistance 13f, 13h: Connector 60: Control part 61: Resistance measurement means Harness : H1, H2
X: Obstacle

Claims (10)

An opening / closing body capable of closing, a contact provided to open and close in response to the occurrence of a predetermined event, and a control unit electrically wired to the contact, the control unit responding to the opening and closing of the contact Place it on the switchgear that is designed to perform the specified control,
A first resistor electrically connected between the contact and the control unit so as to be connected in parallel to the contact, and between the contact and the control unit so as to be connected in series to the contact. And a second resistor electrically wired to
The control unit includes a resistance measuring unit that measures a combined resistance value of the contact, the first resistor, and the second resistor, and performs predetermined control according to a combined resistance value measured by the resistance measuring unit. Opening and closing device.   The controller determines that the contact is closed when the combined resistance value is within a first range, and the combined resistance value is within a second range that is greater than the first range. In addition, it is determined that the contact is open, and the combined resistance value is not within the first range and not within the second range, it is determined as abnormal, and any of these determinations 2. The switchgear according to claim 1, wherein predetermined control is performed according to whether the determination is made.   If the control unit determines that the abnormality is present, the control unit determines whether the combined resistance value is within a third range that is smaller than the first range, and further determines that the combined resistance value is less than the second range. 3. The switchgear according to claim 2, wherein the switchgear is determined to be within a larger fourth range, and predetermined control is performed according to these determinations.   The control unit determines that a short circuit has occurred on the control unit side than the first resistance and the second resistance when the combined resistance value is within a third range smaller than the first range, The opening / closing apparatus according to claim 3, wherein predetermined control is performed.   The control unit determines that a disconnection has occurred on the control unit side than the first resistance and the second resistance when the combined resistance value is within a fourth range larger than the second range, The switchgear according to claim 3 or 4, wherein predetermined control is performed.   The switchgear according to any one of claims 1 to 5, wherein one or both of the first resistor and the second resistor are detachably provided. One terminal and the other terminal of the contact are respectively detachable from the electric wiring on the control unit side,
A second resistor is detachably connected between the one terminal and the electric wiring on the control unit side, and an electric wire is detachably connected between the other terminal and the electric wiring on the control unit side. The switchgear according to claim 6, wherein the second resistor and the electric wire are bundled and integrated. The opening / closing body includes an opening / closing body main body, and a movable seat plate connected to the opening / closing body main body so as to move in the opening / closing direction, and capable of contacting the seating target portion when the opening / closing body is fully closed. Comprising a plate,
The switchgear according to any one of claims 1 to 7, wherein the predetermined event is movement of the movable seat plate relative to the switchgear body.   The switchgear according to claim 8, wherein the first resistor and the second resistor are arranged on a closing direction end portion side of the switch body. A reel device that winds or unwinds the electrical wiring connected to the first resistor and the second resistor is provided at the stationary part on the opening / closing body opening direction side,
10. The opening / closing device according to claim 9, wherein the first resistor and the second resistor are arranged at positions where the opening / closing body is not wound around the reel device in a range in which the opening / closing body operates from a fully open position to a fully closed position. .

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