JP2006200187A - Opening/closing body and safety device therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To detect the contact of an obstacle to immediately stop a closing operation by merely adding to a safety device to an opening/closing body by an easy construction. <P>SOLUTION: This safety device comprises a mounting plate 9 fixed to the tip face of the opening/closing body in the closing direction, a transmission module TM bound to the mounting plate through an elastic member 11, an input plate 12 energized to be separated from the mounting plate and supported so as to be positioned close to and apart from the mounting plate, and a forced movement release means forcibly moving the transmission module in conjunction with the movement of the input plate in the mounting plate direction and, when moved to a position beyond a predetermined limit position, releasing and vibrating the transmission module by the elastic member. The transmission module comprises piezoelectric elements 33 installed on both sides thereof, a power generation part 29 having a passage 34 installed therebetween and an impact element 35 rollingly stored in the passage, and a transmission part 30 transmitting, by radio, an obstacle detection signal with a power supplied from the power generation part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an opening / closing body such as a gate and a shutter that are opened and closed by a driving device, and a security device therefor. In particular, the present invention relates to a mechanism for protecting an obstacle by detecting this when an opening / closing body in the middle of closing contacts a human or other obstacle and stopping the closing control by the driving device.

When the opening / closing body is automatically opened and closed by the drive device, when the opening / closing body in the process of closing is in contact with a person, wheelchair or other obstacle, immediately protect the obstacle from injury or damage. It is necessary to stop the drive device by detecting contact.
A conventional security device that realizes this protection has a contact sensor attached to an opening / closing body, and transmits a detection signal of the contact sensor to a control unit of the drive device by wire or wirelessly, and the control unit drives the drive device based on the detection signal. Was configured to stop immediately. When the transmitter is used in addition to the contact sensor and the contact sensor, the power required by both of them is supplied from the ground-side commercial power supply common to the driving device by wiring to the opening / closing body. Alternatively, power is supplied by sliding the electrode provided on the opening / closing body to the rainproof long electrode provided on the ground side.
Nothing in particular

  Therefore, in order to supply commercial power to the contact sensor, it is necessary for an electrician to perform wiring work to the opening and closing body, so there is a problem that there is a limit to those who can perform the construction, and the wiring work itself It was not easy. In addition, a device using a rainproof long electrode and a contact electrode has a high equipment cost and is not only easy to install, but also has a problem in accuracy of opening / closing control due to poor contact. Furthermore, it has been particularly difficult to install a conventional security device that supplies commercial power by wiring to an opening / closing body on an existing exterior opening / closing body.

  The present invention has been made in view of the above circumstances, and the problem to be solved is that it does not require wiring work to the opening / closing body, and is simply an obstacle at an appropriate position of a new or existing opening / closing body. By simply adding a detection unit, the closing operation of the drive device can be stopped immediately by detecting the opening / closing body in the middle of closing when it comes into contact with an obstacle.

  In order to solve the above problems, the invention of claim 1 is an open / close body in which an obstruction detection unit (hereinafter simply referred to as a detection unit) is provided on the front end surface in the closing direction. An input plate that is always urged away from the mounting plate and supported so as to be able to approach and separate from the plate, and a piezoelectric self-transmitting module (hereinafter simply referred to as transmitting) supported by the mounting plate via an elastic member. Module)), the transmission module is forcibly moved from a stable position held by the elastic member as the input plate is moved in the direction of the mounting plate, and the moving distance is predetermined. Forcibly moving release means for releasing the transmitting module and vibrating by the elastic member when the limit position is exceeded, and fixing the mounting plate to the front end surface of the opening / closing body in the closing direction. The transmitting module is attached to a sphere having a mass, a passage for guiding reciprocation of the sphere, piezoelectric elements provided at both ends of the passage, and a case for housing the sphere, the passage, and the piezoelectric element. And a transmitter that wirelessly transmits an obstacle detection signal using power supplied by the power generator.

  With the above configuration, the detection unit is attached by attaching the attachment plate to the front end surface in the closing direction of the opening / closing body. When the input plate is approached by the external force in the direction of the mounting plate, the forcible moving means forcibly moves the transmitting module against the elastic member and releases the transmitting module when the limit position is exceeded. Vibrates for a certain time by the elastic member. In the meantime, the ball of the power generation unit reciprocates in the passage, repeatedly collides with the piezoelectric elements on both sides to generate power, and supplies the power to the transmission unit, so an obstacle detection signal of a predetermined frequency is transmitted from the transmission unit. The

The elastic member that supports the piezoelectric self-transmitting module of the obstacle detection unit is stretched on each of the supporting members that protrude from the mounting plate at a certain distance, and is attached to both sides of the piezoelectric self-transmitting module. The coil spring is coupled, and the forcible movement release means is configured such that one of the coil springs from a stable position where the piezoelectric self-transmitting module is maintained by the coil spring as the input plate approaches the mounting plate. When the moving distance exceeds a predetermined limit position, the piezoelectric self-transmitting module is released and vibrated by the two coil springs.
With the above configuration, when the input plate is approached in the direction of the mounting plate by external force, the forcible moving means forcibly moves the transmitting module in the direction of one coil spring and releases the transmitting module when the limit position is exceeded. Therefore, both sides of the transmitting joule vibrate for a certain time by the coil spring. In the meantime, the ball of the power generation unit reciprocates in the passage, repeatedly collides with the piezoelectric elements on both sides to generate power, and supplies the power to the transmission unit, so an obstacle detection signal of a predetermined frequency is transmitted from the transmission unit. The

In order to solve the above-mentioned problem, the invention according to claim 3 is the mounting plate including the obstacle detection unit according to claim 1 or 2 at an arbitrary position or a plurality of positions in the longitudinal direction of the front end surface in the closing direction of the opening / closing body. The obstruction detection unit is covered with a cover body which is fixedly attached, is provided so as to be movable back and forth in the closing direction, and is urged in the closing direction, and the cover body is attached to the obstruction detection unit. It is characterized by being connected to the input board.
With the above configuration, when the cover body at the front end in the closing direction of the opening / closing body contacts an obstacle while the opening / closing body moves in the closing direction, the cover body is moved in the direction opposite to the closing direction. Move toward the mounting plate. Based on this, the transmitting module forcibly moves the transmitting module by the elastic member (in the direction of one coil spring) and releases the transmitting module when the limit position is exceeded. Vibrated for a certain period of time. In the meantime, the ball of the power generation unit reciprocates in the passage, repeatedly collides with the piezoelectric elements on both sides to generate power, and supplies the power to the transmission unit, so an obstacle detection signal of a predetermined frequency is transmitted from the transmission unit. The

According to a fourth aspect of the present invention, there is provided a safety device for an opening / closing body according to the present invention, wherein the driving device for opening / closing the opening / closing body according to the first, second or third aspect is an obstacle output by the transmission unit of the detection unit attached to the opening / closing body A receiving unit for receiving the detection signal is provided, and a control unit for stopping the drive control in the closing direction of the opening / closing body by the driving device based on the input of the obstacle detection signal by the receiving unit is provided. It is a feature.
With the above configuration, when the input plate or cover body of the detection unit at the tip of the opening / closing body in the middle of closing comes into contact with an obstacle, the detection unit outputs an obstacle detection signal. When this signal is received by the receiving unit of the driving device, the control unit of the driving device stops closing control of the opening / closing body.

  According to the first aspect of the present invention, the power generation unit generates power when the opening / closing body comes into contact with an obstacle in the middle of closing only by fixing the mounting plate of the detection unit to the front end surface of the existing or new opening / closing body. Transmits obstacle detection signals, so that it is possible to detect obstacles and send detection signals without requiring special processing of the opening and closing body and without requiring wiring work to supply commercial power. it can. This obstacle detection signal can be used to stop the closing control of the opening / closing body driving device. Since no wiring work is required, it is possible to install an opening / closing body having an obstacle detection function only by a contractor without an electrician.

  According to the invention of claim 2, when the opening / closing body has a horizontal tip and is closed downward, the elastic member can be easily attached, and as much as possible when released by the forced movement release means. The vibration duration can be taken longer.

  According to the invention of claim 3, the detection unit mounting plate is fixed to the tip of the existing or new opening / closing body, the cover body is movably mounted to cover the detection unit, and only coupled to the input plate. Thus, even when an obstacle comes into contact with an arbitrary position of the entire length of the cover body, it can be detected. Moreover, since the detection unit is covered with the cover body and is not exposed to the outside, the weather resistance and crime prevention are excellent.

  According to the invention of claim 4, when an obstacle comes in contact with the existing or newly installed opening / closing body attached with the detection unit, the driving device receives the obstacle detection signal output from the detection unit and performs the closing operation. Since this is stopped, obstacles can be reliably protected. In addition, the driving device for automatically opening and closing the opening / closing body is low-cost only by providing a receiving unit that receives an obstacle detection signal from the detection unit and a control unit that controls the driving device based on the output from the receiving unit. The facility can implement an obstacle protection function.

Next, embodiments of the present invention will be described with reference to the drawings. The present invention can be applied to various types of opening and closing bodies, and will be described below based on an embodiment when applied to a flip-up type gate as one kind thereof.
FIG. 1 is a front view of a flip-up gate, FIG. 2 is a plan view, FIG. 3 is a side view showing the moving process of the gate from an open position to a closed position, and FIG. 4 is shown in FIG. FIG. 5 is a partially broken front view in the same detection state, and FIG. 6 is a front view showing another example of the detection unit. FIG. 7 is a block diagram schematically showing the configuration of the detection unit, FIG. 8 is a cross-sectional view showing an example of the configuration of the power generation unit, and FIG. 9 is a block diagram showing an example of the configuration of the opening / closing body driving device.

  In FIG. 1, 1L and 1R are gate pillars, and a known flip-up type gate is provided between them. This flip-up type gate has an arm 3 that is bridged between the gate pillars 1L and 1R and the left and right ends of the gate body 2 and is pivotally mounted, as in the conventional case, and is provided at the end of the arm on the side of the gate pole. The drive shaft (not shown) is rotated by a drive device (see FIG. 9) housed in a housing 4 attached to the gate pole, so that a horizontal state (2a) is formed in the upper part of FIG. It is rotated from the open position indicated by (2) through (2b) (2c) to the closed position indicated by the vertical state (2d) at the left end of FIG.

  2 in FIG. 2 is a connecting bar for connecting the gate side ends of the left and right arms, 6 is a puller provided on the site of the lower center of the gate body 2, and 7 in FIG. 2 is a main body support fitting provided so as to protrude downward from the left and right ends of the two.

  Reference numeral 8 in FIG. 1 denotes a cover body provided at the front end in the closing direction of the opening / closing body (gate) according to the present invention. In the illustrated example, the cover body 8 is provided so as to be movable up and down with respect to the lower end portion of the gate body 2. The cover body 8 is formed in a U-shaped cross section so that there is no gap between the cover body 8 and the lower end portion of the gate body 2 that may impair the appearance of the gate even when it is lowered to the lowest position. It is desirable to accommodate the lower end portion of the gate body in the groove of the cover body.

  In the gate according to the present invention, the detection unit U is attached to the lower end surface of the gate body 2, that is, the front end surface in the closing direction so as to be accommodated in the groove of the cover body 8, and coupled to the cover body 8. Has been.

  One or more detection units U are attached. In the case of one, the cover body 8 is attached at the center in the longitudinal direction of the gate so that the external force is surely applied to the detection unit when an external force is applied to the cover body 8 as will be described later. It is desirable to consider the mounting structure. Moreover, when attaching a some detection unit, it is good to provide at equal intervals in the longitudinal direction of a gate main body as shown in figure for the same reason. In this case, a plurality of cover bodies 8 having substantially the same length corresponding to each detection unit may be used, and the cover body 8 has a length corresponding to substantially the entire length of the gate body 2 as in the illustrated example. One cover body may be used. 1 and 2 have the same configuration, one of them will be described in detail with reference to FIGS. 4 to U.

  The detection unit U includes a mounting plate 9 fixed to the front end surface of the opening / closing body in the closing direction, a piezoelectric self-transmitting module TM supported on the mounting plate via an elastic member 11, and a mounting plate that is always mounted on the mounting plate 9. In the example shown in the figure, the input plate 12 is urged by gravity and is supported so as to be able to approach and separate, and the input plate 12 receives an external force and approaches the mounting plate 9 direction. As a result, the transmission module TM is forcibly moved from the position stably maintained by the elastic member 11 to a position deviated, and the transmission module TM is moved when the movement distance exceeds a predetermined limit position. Forced movement release means 13 that is released and vibrated by the elastic member 11 is provided. In the illustrated example, the elastic member 11 is a coil spring stretched on each of the support members 10 projecting from the mounting plate 9 at a certain distance. It is also possible to use any other form of elastic member that is released and vibrates after being forcibly moved.

  In the detection unit U, when the opening / closing body is a gate, the mounting plate 9 is fixed to the lower end surface of the gate body 2 with screws or the like, the input plate 12 is accommodated in the groove of the cover body 8, and the bottom wall The input plate 12 to the mounting plate 9 are concealed by the cover body 8.

  The means for urging the input plate 12 in the direction away from the mounting plate 9 uses gravity, but in order to allow the input plate 12 to move up and down while always maintaining a parallel state with the mounting plate 9, In the illustrated example, the input plate 12 is formed in an upper U-shape, and the end portions of the support member 14 projecting from both sides of the mounting plate 9 and the link members 15 and 16 pivotally supported at both end portions of the input plate 12 are provided. The intermediate plate is connected by a support shaft 17 penetrating the long hole, and the input plate 13 is normally urged downward by gravity. However, the distance by which the input plate can be lowered from the mounting plate is limited to the range shown in FIG. 4 due to the length of the long hole penetrating the support shaft 17 of the link members 15 and 16.

  In the example of FIG. 4, the forced movement release means 13 has a lever 19 pivotally supported by a long hole 18 formed at one end at a fixed point on the mounting plate 9 side and at the other end formed on the side wall of the input plate 12. An elastic member such as a string-wound spring 20 having a base end fixed to one end of the lever, an intermediate point supported by the lever 19 so as to form an inverted side surface, and a tip biased toward the bottom surface of the transmission module TM. And a locking projection 21 provided on the bottom surface of the transmission module.

  With the above configuration, the forced movement release means 13 is such that when the input plate 12 is in the lowered position as shown in FIG. 4, the other end of the lever 19 is on one end side of the long hole 18, and the string spring 20 The tip is brought into contact with the bottom surface on the front side of the locking projection 21 of the transmission module TM present at a stable position by the coil spring 11. On the other hand, when the input plate 12 is raised by receiving a force in the direction of the mounting plate 9 as shown in FIG. 5, the other end of the lever 19 moves to the other end side of the long hole 18 while centering on a fixed point. And the other end approaches the mounting plate 9 direction, so that the distal end of the string spring 20 is locked to the locking projection 21 of the transmitting module, and the transmitting module is shown in FIG. 5, the coil spring on one side (right side in FIG. 4) expands and the coil spring on the other side (left side in FIG. 4) is compressed. When the transmission module is moved to a predetermined distance, the tip of the coiled spring is detached from the locking projection 21, so that the transmission module vibrates for a certain period by the coil springs on both sides. Yes. When the external force applied to the input plate 12 is released, the input plate 12 descends to the position shown in FIG. For this reason, the lever 19 also returns to the initial position, so that the tip of the string-wound spring returns to the front side of the locking projection of the transmission module again.

  In order to facilitate the necessary locking of the distal end of the string spring 20 with respect to the locking protrusion 21 and the separation from the locking protrusion after the locking protrusion has been moved to a predetermined position, Alternatively, a member such as a cylinder may be provided. Further, in order to prevent the distal end of the string spring from coming off from the locking projection and preventing the vibration of the transmission module from being disturbed, as shown in FIGS. 4 and 5, the mounting plate 9 is provided with a support member 10 and a coil spring. 11 and a protective cover 22 attached to protect the transmission module TM are provided with a hole 23 through which the coiled spring 20 is inserted, and the length of the hole is set to raise the input plate 12 as shown in FIG. When this is done, it is desirable that the vicinity of the tip of the string spring 20 hits a part of the periphery of the hole 23 so that the tip of the string spring is pushed away from the locking projection 21.

  When the protective cover 22 is provided, one end of the lever 19 can be pivotally attached to a protruding plate provided on the bottom surface of the protective cover.

  In order to support the input plate 12 so as to be close to and away from the mounting plate 9 and to bias the input plate 12 in a direction away from the mounting plate, any structure other than the above example can be used. FIG. 6 illustrates a rod-shaped guide in which a coil spring 24 is coupled between the mounting plate 9 and the input plate 12 and extends from one or both of the mounting plate 9 and the input plate 12 through the coil in the other direction. The member 25 is provided.

Moreover, the forced movement release means of the transmission module is not limited to a structure that mechanically applies force as in the above example, and the transmission module includes the permanent magnet 26 and the mounting plate 9 as illustrated in FIG. A permanent magnet 28 that acts on the permanent magnet 26 is attached to one end of a L-shaped lever 27 that is swingably supported by a fulcrum provided to the lever 27, and the other end of the lever 27 is attached by gravity or other urging means. In a state where the input plate 12 is always in contact with the input plate 12 and is separated from the mounting plate 9, the permanent magnet 27 approaches the permanent magnet 28 of the transmitting module in the neutral position and performs an attracting action. It can also be configured as follows.
With the above configuration, when the input plate 12 is pushed up, the lever 27 is rotated in the clockwise direction in FIG. 6, so that the transmitter module TM is moved in the left direction by the attractive force of both magnets and at the same time one coil When the spring 11 is extended and the rightward pulling force of the coil spring wins over the leftward force by the magnet, the transmitting module is released from the attracting force between the magnets and returns, and thereafter, for a certain period, It vibrates by the action of the coil spring.

Next, the transmission module TM will be described with reference to FIGS.
As the transmission module TM provided in the detection unit U described above, a piezoelectric self-transmitter known from JP2003-133971, JP2003-209980, JP2004-146768, and the like is used. it can. The transmission module TM includes a power generation unit 29 and a transmission unit 30, as shown in FIG. As shown in FIG. 8, the power generation unit 29 has two PZT (zinc titanium zirconate) piezoelectric ceramic plates disposed on opposite inner wall surfaces of a rectangular parallelepiped or cylindrical housing 31 via a cushioning material 32. Are provided so as to oppose each other, and a passage 34 formed of a block or the like fixed to the wall surface of the cylinder or the housing is provided between the piezoelectric elements 33, and an appropriate ball such as an iron ball or a ceramic ball is provided in the passage. The collision element 35 having a mass is accommodated in a movement automatically, and a lead wire 36 is connected to each piezoelectric element 33.
With the above configuration, each time the colliding element 35 collides with the piezoelectric elements 33 on both sides, electric charges are generated in the piezoelectric elements and output from the lead wires 36a, 36b, 36c.

  Although not shown, the transmitting unit 30 includes a rectifying unit, a charging unit, a determining unit, a transmitting control unit, and a signal generating unit. The rectifying unit rectifies and smoothes the pulsating current input from the lead wire of the power generation unit 29 and supplies the pulsating flow to the charging unit. When the determination means determines that the charging voltage exceeds the specified level, the transmission control means supplies current to the signal generation means by inputting to the transmission control means, so that the signal generation means A signal having a predetermined frequency is transmitted from an antenna (not shown) provided in the transmission module TM as an obstacle detection signal using the generated current. When the determination means determines that the charging voltage has become lower than the specified level, the transmission control means stops the current supply to the signal generation means, so that the transmission of the obstacle detection signal is stopped. .

  A drive device 37 for opening and closing the gate provided in the casing 4 of the gate pillar 1L includes a motor 38, a reduction and transmission gear (not shown), and rotation control of the motor 38, as illustrated in FIG. In addition to the elements provided in the conventional gate drive device such as the control unit 39 for performing the above, a receiving unit 40 newly provided for carrying out the present invention is provided. The receiving unit is configured to be input to the control unit 39 as a command signal for stopping the motor when an obstacle detection signal transmitted from the transmission unit 30 of the detection unit U is received.

  The control unit 39 may be electrically connected to an operation unit 41 for automatically opening and closing the gate. The operation unit is provided with an opening button switch 41a and a closing button switch 41b. Based on the input of the opening command signal to the control unit 39 corresponding to the operated opening button switch 41a, the motor 38 is operated. Is driven to rotate, and the rotation of the motor is stopped and operated based on the open detection signal output from the open detector 42 when the gate body 2 is flipped up and opened to the open position (2a) in FIG. When the closing command signal is input to the control unit 39 in response to the closing button switch 41b, the motor 38 is driven to rotate and the gate body 2 at the open position (2a) in FIG. ), The rotation of the motor is stopped based on a closing detection signal output from the closing detector 43.

  When the gate is automatically opened / closed by radio waves transmitted from an automobile or a wireless remote controller provided indoors, the receiver 40 receives radio waves of a specific frequency from the wireless remote controller. A circuit can be added or a receiving circuit can be provided separately from the receiving unit 40, and an output from each receiving circuit can be given to the control unit to control the rotation of the motor.

  As described above, when the operation part 41 or the wireless remote controller is operated to close the gate in the open position, a person, a wheelchair, or other obstacles come into contact with the lower end of the gate body 2 during the lowering. When the cover body 8 is moved upward, the input plate 12 of FIG. 4 is raised as shown in FIG. 5, so that the transmission module TM vibrates and generates the power generation unit 29, resulting in the transmission unit 30. Transmits an obstacle detection signal. The receiving unit 40 of the driving device 37 receives this and gives a motor stop command signal to the control unit 39, so that the motor is immediately stopped. Therefore, the gate body in the middle of closing is stopped. When the obstacle moves and no external force is applied to the cover body 8, the cover body 8 returns to a normal position. In that state, when the closing command signal is input again from the operation unit 41 or the wireless remote controller, the gate restarts the descent, and the control unit based on the closing detection signal from the closing detector 43 when reaching the closed position. 39 stops the lowering control of the gate.

  The present invention is not limited to the above-described flip-up type gate, but can be applied to a rail travel type gate, a non-rail type gate, a towing movable type gate, and other various opening / closing bodies.

Front view of a flip-up gate. FIG. The side view in which a gate door shows the movement process from an open position to a closed position in steps. The partially broken front view in the non-detection state which extracts and shows only the detection unit in the obstacle detection apparatus shown by FIG. The partially broken front view in a detection state similarly. The front view which shows the other example of a detection unit. The block diagram which shows the structure of a detection unit roughly. Sectional drawing which shows an example of a structure of an electric power generation part. The block diagram which shows an example of a structure of the drive device of an opening / closing body.

Explanation of symbols

1L, 1R Gate pillar 2 Gate body 3 Arm 8 Cover body U Detection unit 9 Mounting plate 10 Support member 11 Coil spring 12 Input plate 13 Cover body biasing means 15, 16 Link 17 Support shaft 18 Long hole 19, 20, 21 Forced movement Release means 19 Lever 20 String-wound spring 21 Locking projection TM Transmission module 29 Power generation unit 31 Housing 33 Piezoelectric element 34 Passage 35 Colliding element 36 Lead wire 30 Transmission unit 37 Drive unit 38 Motor 39 Control unit 40 Reception unit 41 Operation unit

Claims (4)

In an opening / closing body such as a door provided with an obstacle detection unit on the front end surface in the closing direction,
The obstacle detection unit includes a mounting plate, an input plate that is always urged by the mounting plate so as to be separated from the mounting plate, and is supported so as to be freely separated from the mounting plate. As the piezoelectric self-transmitting module is supported and the input plate approaches the mounting plate, the piezoelectric self-transmitting module is forcibly moved from a stable position held by the elastic member, Forcibly moving release means for releasing the piezoelectric self-transmitting module and vibrating by the elastic member when the moving distance exceeds a predetermined limit position; Attached to the surface,
The piezoelectric self-transmitting module includes a sphere having a mass, a passage for guiding reciprocal movement of the sphere, piezoelectric elements provided at both ends of the passage, and a case for housing the sphere, the passage, and the piezoelectric element. An opening / closing body comprising: a power generation unit comprising: a power transmission unit configured to wirelessly transmit an obstacle detection signal with power supplied from the power generation unit.   The elastic member that supports the piezoelectric self-transmitting module of the obstacle detection unit is stretched on each of the support members protruding from the mounting plate at a certain distance, and is coupled to both sides of the piezoelectric self-transmitting module. The coil spring is a forced movement release means that moves the piezoelectric self-transmitting module from the stable position maintained by the coil spring as the input plate approaches the mounting plate. 2. The device according to claim 1, wherein when the moving distance exceeds a predetermined limit position, the piezoelectric self-transmitting module is released and vibrated by the two coil springs. Opening and closing body.   The obstruction detection unit described in claim 1 or 2 is fixedly attached to the attachment plate at an arbitrary position or a plurality of positions in the longitudinal direction of the front end surface of the opening / closing body in the closing direction, and is moved back and forth along the closing direction. An exterior exterior opening / closing body characterized in that the obstacle detection unit is covered with a cover body that is freely provided and biased in the closing direction, and the cover body is coupled to an input plate of the obstacle detection unit. .   The driving device for opening and closing the opening / closing body is provided with a receiving section for receiving an obstacle detection signal output from the transmitting section of the detection unit according to claim 1 attached to the opening / closing body, and the receiving section is A safety device for an opening / closing body provided with a control unit for stopping drive control in the closing direction of the opening / closing body by the driving device based on the input of an object detection signal.

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