JP4879949B2 - Obstacle sensing structure for switchgear - Google Patents

Description

  The present invention relates to an obstacle detection structure in an opening / closing device such as a shutter device including an overhead door, a door, a sliding door including a shutter, a sash window, a roll screen, a blind, a gate, a gate, and a sliding wall device, and is particularly applied as a shutter device. In particular, the present invention relates to an obstacle sensing structure for a switchgear.

  Conventionally, in this kind of obstacle detection structure for an opening / closing device, for example, as described in Patent Document 1, a light emitting portion (a light emitting portion protruding downward) at both ends of the opening / closing body width direction at the lower end portion of the opening / closing body. A light emitting part) and a light receiving part (capturing part) so as to detect that the light beam of the obstacle detection medium formed between the light emitting part and the light receiving part is blocked by the obstacle and stop the opening / closing body There is an invention.

However, according to the prior art, since the front surfaces of the light emitting unit and the light receiving unit are exposed, dust, dirt, condensed water, cloudy film, or other foreign matter adheres to the lens or light emitting body on the front surface. May end up. In this case, when the adhesion of the foreign matter progresses, the obstacle sensing accuracy is lowered, and the attached and accumulated foreign matter is erroneously detected as an obstacle, and the opening / closing body may stop.
JP-A-11-182161

  The present invention has been made in view of the above-mentioned conventional circumstances, and a problem to be solved is to prevent false detection caused by foreign matter adhering to a part that releases, captures, or reflects an obstacle sensing medium, and sense accuracy. It is an object of the present invention to provide an obstacle sensing structure for a switchgear that can maintain the function for a long period of time.

  One means for solving the above-mentioned problem is an obstacle detection structure for an opening / closing device provided at least in an opening / closing body operable in a closing direction so as to sense an obstacle closer to the closing direction than the opening / closing body. A non-contact sensing means and a sensing part protection means are provided at an end of the opening / closing body on the closing direction side, and the non-contact sensing means extends from an end of the opening / closing body on the closing direction side to the opening / closing body closing direction. A discharge part and a capture part are provided so as to protrude, and an obstacle sensing medium is emitted from the release part in the direction of the opening / closing body, and an obstacle entering the path of the obstacle detection medium is sensed by the capture part. When the opening / closing body is in a closed state, the sensing unit protection means has a foreign object attached to a part of the non-contact sensing means that emits, captures or reflects an obstacle sensing medium. I will prevent you from doing Characterized in that it is configured to.

  According to another means, the sensing unit protecting means is a part of the non-contact sensing means that emits, captures, or reflects an obstacle sensing medium in accordance with the operation of the opening / closing body immediately before closing. On the other hand, the width direction end of the opening / closing body is configured to be close to each other.

  According to another means, the sensing part protection means includes a wiping member for dropping attached foreign matter at an end in the width direction of the opening / closing body, and the wiping member is provided on the opening / closing body. With this operation, the non-contact sensing means is provided so as to be in slidable contact with a site that releases, captures, or reflects an obstacle sensing medium.

  In another means, the sensing unit protection means supports the non-contact sensing means so that the non-contact sensing means slides in the opening / closing body opening / closing direction with respect to the opening / closing body, and the non-contact detection means supports the opening / closing body. As a result of sliding relative to the opening / closing body opening direction, the widthwise end of the opening / closing body with respect to the portion of the non-contact sensing means that discharges, captures, or reflects the obstacle sensing medium. It is characterized by being configured to bring the parts close together.

  Further, according to another means, the sensing part protection means may be configured such that the part of the non-contact sensing means and the part that releases, captures, or reflects the obstacle sensing medium is more open / closed than the end part in the opening / closing body closing direction. It is characterized by being arranged at a predetermined distance from the opening direction.

  The opening / closing device to which the obstacle sensing structure for a switching device according to the present invention is applied may be any device provided with at least an opening / closing body operable in the closing direction and partitioning the space by the opening / closing body. The opening / closing device includes an aspect in which the opening / closing body is used to perform only a closing operation, an aspect in which the opening / closing body is used to perform both an opening operation and a closing operation, and the like.

  As a specific example of the opening and closing body, an aspect in which a plurality of slats and pipes are continuously provided in the opening and closing direction, an aspect in which a panel, a sheet-like object, and a net-like object are provided in a single or a plurality in the opening and closing direction, Or the aspect etc. which combine a slat, a panel, a pipe, a sheet-like thing, a net-like thing, etc. suitably are mentioned.

In the present specification, the “opening / closing body thickness direction” means the thickness direction of the opening / closing body in the closed state.
Further, in this specification, the “opening / closing body opening / closing direction” means a direction in which the opening / closing body opens / closes and is not a width direction or a thickness direction of the opening / closing body.
Further, in this 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.

Since the above means is configured as described above, the following effects can be obtained.
According to the above-mentioned means, when the opening / closing body is closed, the part that releases, captures, or reflects the obstacle sensing medium in the non-contact sensing means such as the emitting part, the capturing part, and the reflector is protected. Can do. Therefore, it is possible to prevent foreign matter such as dust, dust, condensed water, and cloudy film from adhering to the part from being sensed as an obstacle, and thus the sensing accuracy by the non-contact sensing means can be maintained over a long period of time. .

In addition, according to another means, the portion that releases, captures, or reflects the obstacle sensing medium in the non-contact sensing means can be protected with a simple structure when the opening / closing body is closed. .
Moreover, when the opening / closing body is in a closed state, the end of the opening / closing body is close to the part that releases, captures, or reflects the obstacle sensing medium in the non-contact sensing means such as the emitting part, the capturing part, and the reflector. In addition, since the effect of keeping the temperature is achieved, the freezing of the part and the freezing of the part and the contact target part can be prevented.

  Furthermore, according to another means, the part which releases, captures or reflects the obstacle sensing medium in the non-contact sensing means can be wiped by the operation of the opening / closing body. Therefore, even if foreign matter such as dust, dust, condensed water, or cloudy film adheres to the part, the foreign matter can be positively removed, and the detection accuracy by the non-contact sensing means can be maintained high for a longer period of time. Can do.

Further, according to another means, when the opening / closing body is closed, the non-contact sensing means slides in the opening / closing body opening direction by contacting the contact target portion (floor surface, ground, frame member, etc.). Then, the part that releases, captures, or reflects the obstacle sensing medium is brought close to the end in the width direction of the opening / closing body.
Further, when the opening / closing body is opened, it slides in the closing direction of the opening / closing body, thereby separating the part that releases, captures or reflects the obstacle sensing medium from the end in the width direction of the opening / closing body in the closing direction.
Therefore, the structure in which the end in the width direction of the opening / closing body is moved closer to or away from the part that releases, captures, or reflects the obstacle sensing medium can be a simple structure with high productivity. In particular, according to the aspect provided with the wiping member, the foreign matter can be effectively removed.

Further, according to another means, when the opening / closing body is closed, the part that releases, captures, or reflects the obstacle sensing medium is at a predetermined interval from the contact target part (floor surface, ground, frame member, etc.). It is arranged only near the opening / closing body opening direction.
It is possible to prevent the foreign matter accumulated in the contact target part from adhering to the part that releases, captures, or reflects the obstacle detection medium, and thus maintains the detection accuracy by the non-contact detection means for a longer period of time. Can do.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The obstacle sensing structure for a switchgear according to the present embodiment is disposed in or on an opening or inside a building / structure such as a house, building, warehouse, factory, underground shopping street, tunnel, or vehicle loading platform, and opens and closes the opening. In addition, the present invention can be applied to a so-called shutter device that partitions or opens a space inside the housing, and can also be applied to a roll screen device that does not include a guide rail and other opening / closing devices. An example applied to a shutter device that partitions and opens a space by guiding the body in the opening / closing direction by a guide rail will be described.

  The opening / closing device A having the obstacle sensing structure includes an opening / closing body 10 that can be opened and closed, guide rails 20 and 20 that surround both ends of the opening / closing body 10 in the width direction, and guide the operation in the operation direction. And a non-contact sensing means 50 for sensing an obstacle entering the closing direction with respect to the opening / closing body 10 (see FIG. 1). .

  The opening / closing body 10 includes an opening / closing body main body 11 formed by connecting a plurality of so-called slats formed by bending a horizontally long substantially rectangular metal plate so that the slats are vertically adjacent to each other, and the opening / closing body main body 11. And a seat plate member 12 connected to the lower end of the open / close body in the width direction.

The seat plate member 12 is connected to the slat at the lowermost end of the opening / closing body main body 11, and is fixed to the opening / closing body main body 11. The fixing member 12a is opened / closed in the opening / closing body opening / closing direction (see FIG. According to the illustrated example, the contact sensing means 40 has a substantially inverted T-shaped cross section composed of a movable member 12b movable in the vertical direction) and senses the contact of an obstacle with the end of the movable member 12b on the closing direction side. (See FIGS. 2 and 3).
More specifically, the contact sensing unit 40 includes the seat plate member 12 and a proximity sensing unit 51 provided in the non-contact sensing unit 50 described later. The movable sensing unit 51 moves the movable member 12b upward. The operation is sensed (see FIG. 6).

The fixing member 12a is a substantially frame-shaped member having an open bottom surface, and has a curl portion connected to the slat at the lowermost end of the opening / closing body 11 at the outer upper end side (FIGS. 2 and 6). reference).
The seat plate member 12 has a pivotal support portion 12a1 having a substantially concave cross section across the opening / closing body width direction on the lower end side of one end face (the right side surface according to FIG. 6) in the opening / closing body thickness direction.
A pivot member 12c is pivotally supported by the pivot portion 12a1 so that the peripheral end side is pivoted along the opening / closing body opening / closing direction.

  In addition, on each of the front and back surfaces (left and right surfaces in FIG. 6) of the fixing member 12a, projecting in the opening / closing body thickness direction on the end side in the opening / closing body width direction, the non-contact sensing means 50 described later. Engaged portions 12g and 12g (see FIGS. 2 to 3) that support the release side non-contact sensing unit 50a or the capture side non-contact sensing unit 50b in a free-hanging manner are formed. The engaged portions 12g and 12g may be configured by penetrating and fixing another member to the fixing member 12a as illustrated, or may be configured by partially cutting and raising the seat plate member 12. .

Further, the movable member 12b has a substantially inverted T-shaped cross section, and a substantially vertical portion thereof is formed in a substantially frame shape with an upper opening.
The movable member 12b has a pivotal support portion 12b1 extending in the width direction of the opening / closing body on the upper end side of one end surface (left side surface according to FIG. 6) in the opening / closing body thickness direction.
The pivot portion 12b1 is disposed so as to face the pivot portion 12a1 of the fixing member 12a, and pivotally supports the peripheral end side of the rotating member 12c that is pivotally supported by the fixing member 12a.

  Since the movable member 12b is formed by processing the above-described substantially vertical portion by drawing or extruding a metal material, a normal opening is formed on the end face in the opening / closing body width direction. In the present embodiment, the sensing portion protection means is configured by closing the opening with a closing plate 12e (see FIG. 9). This sensing unit protection means will be described in detail later.

The rotating member 12c is brought into contact with the inner surface of the fixing member 12a closer to the opening / closing body opening direction side (upper side in the illustrated example) than the portion pivotally supported by the pivotal support portion 12a1 of the fixing member 12a. It has integrally the rotation control part 12c1 which controls rotation of this rotation member 12c. The rotation restricting portion 12c1 is a portion that is sensed by the proximity sensing portion 51 of the capturing side non-contact sensing unit 50b described later.
Similarly, the rotating member 12c abuts the inner surface of the movable member 12b closer to the opening / closing body closing direction (lower side in the illustrated example) than the portion pivotally supported by the pivotal support portion 12b1 of the movable member 12b. Thus, a rotation restricting portion 12c2 (see FIG. 6) that restricts the rotation of the rotation member 12c is integrally provided.

According to the configuration of the seat plate member 12 and the contact sensing means 40, when an obstacle comes into contact with the movable member 12b from the lower side, the movable member 12b moves in the opening / closing body opening direction due to the contact, and accompanying this movement Thus, the rotating member 12c rotates (see FIG. 6).
Then, the rotation restricting portion 12c1 of the rotating member 12c approaches the proximity detecting portion 51 and is detected by the proximity detecting portion 51, and a control portion (not shown) stops or reverses the closing operation of the opening / closing body 10 by the detection signal.

The position of the rotation restricting portion 12c1 that can be sensed by the proximity sensing portion 51 is not limited to the position where the rotation restricting portion 12c1 contacts the fixing member 12a (the position shown in FIG. 6B). Depending on the sensitivity (detectable distance) of the proximity sensing unit 51, the position where the rotation restricting part 12c1 is rotated by a predetermined angle, in other words, the position where the rotation restricting part 12c1 is separated from the fixing member 12a by a predetermined interval. Can do.
That is, if the detectable distance of the proximity sensing unit 51 is relatively long within the thickness dimension of the entire fixed member 12a, the movable member 12b slightly moves in the opening / closing body opening direction, and the rotation restricting unit is associated with the movement. Even if 12c1 is slightly rotated, the rotation can be sensed. As a result, the opening / closing body 10 can be stopped or reversed while the impact to the obstacle, the opening / closing body 10 and the like is small.

As a preferable means for increasing the detectable distance of the proximity sensing unit 51, the rotating member 12c is made of a non-magnetic material such as an aluminum alloy, and the proximity sensing unit 51 senses the proximity of the magnetic material. In such a case, a magnetic body (for example, a steel plate) may be mounted on at least a portion corresponding to the proximity detecting unit 51 on the contact surface of the rotation restricting unit 12c1 with the fixing member 12a.
Of course, the rotating member 12c itself can be made of a magnetic material such as iron, but from the viewpoint of improving the operability of the movable member 12b and the rotating member 12c by reducing the weight, the rotating member 12c itself is It is preferable to use a lightweight metal material such as an aluminum alloy, and it is also possible to use a synthetic resin material or the like as long as the material can avoid strength problems.

Moreover, the reflection means 12d is provided in the end surface (the substantially horizontal bottom face part in the example of illustration) in the opening-closing body closing direction side in the seat board member 12 mentioned above.
The reflecting means 12d constitutes an erroneous reflection preventing means for preventing an obstacle sensing medium emitted by the emitting portion 52 described later from being reflected by the bottom surface portion of the seat plate member 12 and captured by the capturing portion 53.
The reflecting means 12d is constituted by a reflecting plate that reflects the obstacle sensing medium in a direction other than the capturing part 53 of the non-contact sensing means 50. According to a preferred example of the present embodiment, the obstacle sensing medium is opened and closed. By bending the metal plate so as to be reflected in the body thickness direction, two inclined pieces 12d1 and 12d1 having substantially the same opening / closing body thickness direction are formed, and the opening / closing body width in the seat plate member 12 is formed. It is provided over substantially the entire length in the direction.

The reflecting means 12d has at least a surface on the opening / closing body closing direction side, specifically, a surface on the opening / closing body closing direction side of both inclined piece portions 12d1 and 12d1 so as to easily reflect the obstacle sensing medium.
When the reflecting means 12d is constituted by a reflecting plate inclined as described above, as a specific aspect of the surface processing, the surface of the reflecting means 12d on the opening / closing body closing direction side captures an obstacle sensing medium. A mode in which the surface roughness is small enough to be reflected or diffused in a direction other than the portion 53, and more preferably, the same surface is effective in a direction other than the capturing portion 53, such as a substantially mirror surface. The surface may be processed into a surface that is easily reflected or diffused.
Further, as another specific aspect of the reflecting means 12d, the surface of the reflecting means 12d on the opening / closing body closing direction side is substantially glossy so that at least the obstacle sensing medium can be reflected in a direction other than the capturing portion 53. A mode in which coating or painting is applied, and a mode in which a substantially mirror-like coating or painting is applied to the same surface is more preferable.

According to the reflecting means 12d, even if a part of the obstacle sensing medium emitted from the emitting unit 52 is reflected by the reflecting means 12d, the reflected obstacle sensing medium is in the open / close body width direction. Proceeding in the crossing direction, it is difficult to be captured by the capturing unit 53 (see FIG. 7).
Therefore, by detecting the obstacle sensing medium reflected by the capturing unit 53, it is possible to prevent erroneous sensing that the control unit (not shown) determines that there is no obstacle.
In addition, according to a preferred example of the present embodiment, the reflecting means 12d is composed of two integrally inclined piece portions 12d1 and 12d1 that can be elastically deformed. It also has the function of absorbing an impact when it comes into contact with the contact target site p.
According to a preferred example of the present embodiment, the reflecting means 12d is provided over substantially the entire length of the seat plate member 12 in the opening / closing body width direction, but a part of the obstacle sensing medium discharged from the discharge portion 52 is provided. May be disposed only in a part (preferably in the vicinity of the center) in the width direction of the opening / closing body.

Further, the guide rail 20 is formed in a substantially U-shaped cross section surrounding the end portion in the width direction of the opening / closing body 10 by processing such as drawing or extrusion forming of an aluminum alloy material, bending processing of a steel plate or other metal plate. It is a member made.
A guide piece 21 (see FIG. 5) for guiding a non-contact sensing means 50 described later in the opening / closing body opening / closing direction is fixed in the guide rail 20.
The guide piece 21 is continuously provided over the opening / closing body opening / closing direction of the guide rail 20 with the protruding end in the opening / closing body width direction facing the bottom portion 20a of the guide rail 20.

Further, an inspection portion 23 (see FIG. 1) that can be opened and closed is provided in the opening / closing body closing direction of the guide rail 20 so that the non-contact sensing means 50 can be inspected.
The inspection unit 23 is provided with an opening at a portion corresponding to the non-contact sensing means 50 in the guide rail 20 and the opening is closed by a lid member so that the opening / closing body 10 can be opened and closed according to the illustrated example. It is arranged on the lower end side of the guide rail 20 so that the non-contact sensing means 50 can be checked when it is closed.
In the figure, reference numeral 22 denotes a bracket for fixing the guide rail 20 to a housing or the like. For example, the bracket 22 is formed in a substantially frame shape in cross section and is fixed over substantially the entire length of the guide rail 20.

In addition, the winding device 30 includes a winding shaft 31 that can wind and unwind the opening / closing body 10, an opening / closing device 32 such as a motor that drives and rotates the winding shaft 31, and a control unit that controls the opening / closing device 32 ( (Not shown) and the like, and when the contact sensing means 40 or the non-contact sensing means 50 senses an obstacle, the closing operation of the switch 32 is stopped or reversed by the control unit.
The winding device 30 may have a mode in which the opening / closing body 10 is electrically opened and closed, or a mode in which the opening / closing body 10 is opened electrically and the opening / closing body 10 is closed by its own weight. It may be.

  The non-contact sensing means 50 includes a discharge-side non-contact sensing unit 50a disposed on one end side in the opening / closing body width direction and a capture-side non-contact sensing unit 50b disposed on the other end side in the opening / closing body width direction. The obstacle-side sensing medium emitted from the emission-side non-contact sensing unit 50a side is captured by the capture-side non-contact sensing unit 50b, so that the gap between the emission-side non-contact sensing unit 50a and the capture-side non-contact sensing unit 50b is obtained. The path s of the obstacle sensing medium is formed.

  The discharge-side non-contact sensing unit 50a slides at a predetermined interval in the opening / closing body opening / closing direction with respect to the opening / closing body 10 and engages with the guide rail 20 so as to be guided by the guide rail 20 in the opening / closing body opening / closing direction; And a discharge portion 52 that discharges the obstacle sensing medium substantially in the width direction of the opening / closing body and a weight adjustment member 55 that can be attached and detached, and an end portion on the closing direction side of the opening / closing body 10, specifically, the seat plate member 12. It is arrange | positioned so that it may protrude in the opening-closing body closing direction (downward in the example of illustration) from the edge part of this width direction.

According to the illustrated example, the unit main body 54 has a substantially rectangular parallelepiped frame shape that is long in the vertical direction, and has an opening 54 a having a substantially trumpet cross section through which an end of the opening / closing body 10 in the width direction is guided from above. In addition, an opening 54b is provided on one end face in the width direction of the opening / closing body to house an end portion in the width direction of the opening / closing body 10 (specifically, an end portion in the width direction of the opening / closing body body 11 and the seat plate member 12). (See FIGS. 3 and 4).
Further, on the outer side surfaces of the side wall portions 54c, 54c arranged in the opening / closing body thickness direction of the unit main body 54, an engaging portion 54d that engages with the guide piece 21 of the guide rail 20 is integrally projected. is doing.
Further, an engagement groove 54e is formed on the inner surface of each side wall 54c so as to be slidably engaged with the engaged portion 12g of the seat plate member 12.
And this unit main body 54 is made into the left-right symmetrical shape in the opening-and-closing body thickness direction so that both the discharge | release side non-contact sensing unit 50a and the capture | acquisition non-contact sensing unit 50b can be comprised.
The material of the unit main body 54 is not particularly limited. However, the unit main body 54 can reduce the frictional resistance of the guide rail 20 with respect to the guide piece 21 and can smoothly slide downward without being caught. From the viewpoint of improving the free sag when engaged with the engaged portions 12g and 12g of the seat plate member 12, it is preferable to use a high-density synthetic resin material (for example, POM).

In the engaging portion 54d, a vertical groove 54d1 is formed in a portion protruding in the opening / closing body thickness direction from the outer surface of each side wall portion 54c so as to fit loosely into the guide piece 21 of the guide rail 20. Yes.
The width of the groove 54d1 is set to be larger than the thickness of the guide piece 21 so that the unit main body 54 is slightly movable in the opening / closing body thickness direction.

Further, the engaging groove 54e is formed on the inner surface of each side wall portion 54c so as to extend in a long concave shape from the upper end side to the lower end side, and to be engaged with the engaged portion 12g by the step portion at the inner upper end. It is.
The engaging grooves 54e and 54e are dimensioned so that the unit main body 54 slightly moves in the opening / closing body width direction and the opening / closing body thickness direction while being engaged with the engaged portions 12g and 12g. .

The dimension y (see FIG. 9) from the upper end of each engagement groove 54e to the lower end of the unit main body 54 is such that the amount of protrusion downward of the discharge portion 52 or the capture portion 53 attached to the lower end side of the unit main body 54 is determined. The opening / closing body 10 is set to be appropriate according to the closing speed of the opening / closing body 10 and the like.
That is, when an obstacle is normally sensed in a non-contact manner by the non-contact sensing means 50, a slight time lag (response) occurs from the sensing until the opening / closing body 10 stops or reverses. This time lag tends to increase as the closing speed of the opening / closing body 10 increases.
Therefore, when the closing speed of the opening / closing body 10 is relatively high, the dimension y is set to be large so that the opening / closing body 10 does not come into contact with an obstacle before it stops or reverses. When the closing speed of the opening / closing body 10 is relatively low, it is preferable to set the dimension y to be small.
In the contact sensing means 40 described above, as in the non-contact sensing means 50, a seat plate member is considered in consideration of a time lag from when the movable member 12b comes into contact with an obstacle until the opening / closing body 10 stops or reverses. The vertical sliding widths of the twelve movable members 12 b are appropriately set according to the closing speed of the opening / closing body 10.

The discharge-side non-contact sensing unit 50a is configured by mounting the discharge part 52 and the weight adjusting member 55 on the non-contact sensing means 50 having the above-described configuration, and according to the illustrated example, one end side in the opening / closing body width direction. And the other end side, the side not provided with the opening / closing device 32 (left end side according to FIG. 1) is supported so as to slide in the vertical direction (predetermined dimension y).
The supporting structure will be described in detail. In the discharge-side non-contact sensing unit 50a, both the engaging grooves 54e and 54e of the unit main body 54 are loosely fitted into the substantially engaged portions 12g and 12g of the seat plate member 12. The one groove 54d1 of the unit main body 54 is fitted into the guide piece 21 of the guide rail 20 so as to be loosely fitted, and the bottom wall portion 54f (see FIG. 5) of the unit main body 54 is fitted to the bottom surface 20a of the guide rail 20. Supported in close proximity.
Therefore, the discharge-side non-contact sensing unit 50a is supported in a free-hanging manner so that the lower end side thereof can be slightly swung in the opening / closing body width direction.
Therefore, even if the guide rail 20 is slightly inclined in the opening / closing body width direction, it is difficult to be adversely affected by the inclination, and the path s of the obstacle sensing medium between the discharge unit 52 and the capturing unit 53 is maintained. become.

On the other hand, the capturing-side non-contact sensing unit 50b is configured by mounting the capturing unit 53, the weight adjusting member 55, the electrical wiring guide protecting member 56, and the proximity sensing unit 51 on the non-contact sensing means 50 configured as described above. According to the example shown in the figure, one end side and the other end side in the opening / closing body width direction slide to the side (in the example shown, the right end side) provided with the opening / closing device 32 in the vertical direction (predetermined dimension y). To be supported.
The support structure is substantially the same as the discharge-side non-contact sensing unit 50a, and the capture-side non-contact sensing unit 50b is supported in a free-hanging manner so that its lower end can be slightly swung in the opening / closing body width direction. Is done.

  According to the illustrated example, the engagement portion between the engaged portions 12g, 12g of the seat plate member 12 and the engagement groove 54e of the unit main body 54 is an opening portion from the center of the unit main body 54 in the opening / closing body width direction. Although it is close to the side 54b, the engaging portion is moved toward the center of the unit body 54 in the width direction of the opening / closing body so that the unit body 54 hangs down substantially vertically, or the weight adjusting member 55 is moved to the opening 54b. The dimensions are set so that the position of the center of gravity is appropriate as required, such as moving to the side.

  The discharge unit 52 and the capture unit 53 are configured to capture the obstacle sensing medium that is released from the release unit 52 in the opening / closing body width direction by the capture unit 53. According to a preferred example of the present embodiment, the obstacle detection is performed. A so-called photoelectric sensor that emits infrared rays as a medium from the emitting unit 52 and receives light by the capturing unit 53 is used.

The discharge part 52 is supported with its discharge direction inclined at a predetermined angle toward the opening / closing body 10 side. This predetermined angle is set within a range in which a straight path s of the obstacle sensing medium can be secured between the discharge unit 52 and the capturing unit 53. More specifically, the emission direction of the emission part 52 is inclined toward the opening / closing body 10 within the allowable angle range in the specifications of the emission part 52 and the capture part 53 as photoelectric sensors.
Therefore, a part of the obstacle sensing medium (infrared rays) emitted from the emitting part 52 in a slightly radial shape is received by the capturing part 53 through the linear path s, and the other part is opened and closed. Will be released to the side (see FIG. 8). However, this other part of the obstacle sensing medium (infrared rays) is reflected in the direction other than the capturing unit 53 by the reflection means 12d described above, and thus does not have an adverse effect.

  The electrical wiring of the discharge portion 52 passes through the space in the seat plate member 12 and enters the guide rail 20 on the switch 32 side (right side in the illustrated example), together with the electrical wiring of the capturing portion 53. It rises in the guide rail 20 and is connected to a control unit (not shown) on the switch 32 side. In addition, although this electric wiring can also be set as the structure which stands up the guide rail 20 on the opposite side to the switch 32 (left side in the example of illustration), and is connected to the said control part, in this Embodiment. By consolidating the electrical wiring on the guide rail 20 on the switch 32 side, the wiring connection work of the electrical wiring, the maintainability of the electrical wiring, etc. are improved.

Further, each of the discharge part 52 and the capture part 53 is arranged at a predetermined distance above the lower end of the unit body 54 in the closing direction of the opening and closing body, and is separated from the discharge side non-contact sensing unit 50a and the capture side non-contact. When the sensing unit 50b slides relative to the opening / closing body 10 in the opening / closing body closing direction, the sensing unit 50b is disposed at a position facing and close to the closing plate 12e of the seat plate member 12 (FIG. 9), and a sensing unit protection means for preventing foreign matter such as dust and dirt from adhering to the discharge unit 52 and the capturing unit 53.
That is, when the opening / closing body 10 is closed, the discharge unit 52 and the capture unit 53 are disposed above the contact target site p, and thus are not easily affected by foreign matter accumulated in the contact target site p.
Furthermore, the discharge part 52 and the capture part 53 slide in the opening / closing body closing direction together with the unit main body 54 in accordance with the operation of the opening / closing body 10 immediately before closing, and face each other close to the closing plate 12e of the seat plate member 12. For this reason, it is difficult for foreign matters such as dust and dust to adhere thereto.
In addition, when the opening / closing body 10 is in the closed state, the closing plate 12e of the seat plate member 12 is brought close to the discharging portion 52 and the capturing portion 53, so that the discharging portion 52 and the capturing portion 53 are maintained. Freezing (in a state where water adhering to the lens surface of the discharge part 52 and the capture part 53 is frozen), freezing of the discharge part 52 and the capture part 53 and the contact target site p, and the like can be prevented.
As a further preferred aspect of the sensing unit protection means, a wiping member 12f is disposed on the surface of the closing plate 12e (see FIG. 9).
The wiping member 12f is composed of, for example, a brush or the like, and slides the discharge-side non-contact sensing unit 50a and the capture-side non-contact sensing unit 50b so that the tip thereof slides on the discharge unit 52 or the capture unit 53. Thus, dust and dirt adhering to the discharge part 52 and the capture part 53, and foreign matter including dew condensation water and a cloudy film are wiped off, and further, freezing of the discharge part 52 and the capture part 53 is prevented more effectively. .

Further, the weight adjusting member 55 is made of a metal material, and is disposed below the upper end of the engaging groove 54e in the unit main body 54, so that the free hanging property of the unit main body 54 is improved.
The weight adjusting member 55 is attached by detachable fastening means such as screwing or fitting so that the weight adjusting member 55 can be replaced with a different one if necessary.
That is, for example, in order to improve the free sag of the discharge-side non-contact sensing unit 50a or the capture-side non-contact sensing unit 50b, the weight adjusting member 55 is replaced with a relatively heavy one. Further, in order to improve the vertical slidability of the discharge-side non-contact sensing unit 50a or the capture-side non-contact sensing unit 50b, the weight adjusting member 55 is replaced with one having a relatively small weight.

According to a preferred example of the present embodiment, the weight adjusting member 55 is formed in a shape that can be fastened to one end side of the electrical wiring guide protecting member 56, and the weight adjusting member 55 on the capturing side non-contact sensing unit 50b side. The electric wiring guide protection member 56 is fixed to the front.
The electrical wiring guide protection member 56 covers and protects the electrical wiring (a part or all of signal lines, power supply lines, etc.) to the emission part 52, the capture part 53, the proximity sensing part 51, etc., and flexibly deforms This is a well-known member that freely guides the existing electric wiring in the opening / closing body opening / closing direction, one end side of which is fixed to the unit main body 54 and the other end side within the guide rail 20 is the opening / closing body 10. It arrange | positions so that it may deform | transform according to opening / closing operation | movement of.
The material of the electrical wiring guide protection member 56 is not particularly limited, but is preferably made of synthetic resin from the viewpoint of reducing noise during deformation, contact noise with the guide rail, and the like. From the viewpoint of smoothly sliding the unit main body 54 downward without causing a catch or the like, or from the viewpoint of improving the free sag of the unit main body 54, a relatively heavy material such as metal is used. preferable.

Further, the proximity sensing unit 51 is a proximity sensor that senses the proximity of the magnetic material, and with respect to the unit main body 54 so as to sense the rotation restricting portion 12c1 of the seat plate member 12 disposed in the unit main body 54. The contact sensing means 40 which is fixed and acts in cooperation with the seat plate member 12 described above is constituted.
According to a preferred example of the present embodiment, the proximity sensing unit 51 is provided at only one capturing-side non-contact sensing unit 50b, so that the cost is low. However, both emission-side non-contact sensing units 50a are provided. It is also possible to provide the acquisition side non-contact sensing unit 50b.

The control unit (not shown) on the side of the switch 32 includes a means for invalidating the detection by the discharge unit 52 and the capture unit 53 when the switch body 10 is in the closed position.
The means for detecting the closed position of the opening / closing body 10 includes a contact type sensing switch such as a limit switch, a non-contact type sensing switch such as a proximity switch, a pulse counter, and the like.
According to this configuration, when the opening / closing body 10 is closed, the sensing by the discharge unit 52 and the capture unit 53 is invalidated, and thus the seat plate member 12 is positioned between the discharge unit 52 and the capture unit 53, The seat plate member 12 is not perceived as an obstacle.

Further, the control unit (not shown) on the side of the opening / closing machine 32 causes the opening / closing body 10 to bend in the opening / closing body thickness direction due to the contact of the obstacle from the opening / closing body thickness direction. When the path s of the medium is inclined in the opening / closing body thickness direction, and the obstacle sensing medium is not captured by the capturing unit 53 due to this inclination, the medium is recognized as an obstacle detection and the operation of the opening / closing body 10 is stopped or An electric circuit for inverting and the like (preferably an electric circuit for stopping) is provided.
Note that the configuration in which the path s of the obstacle sensing medium is inclined as described above is based on an appropriate loose fit between the capture-side non-contact sensing unit 50b and the seat plate member 12.
In other words, if the capturing-side non-contact sensing unit 50b and the seat plate member 12 are configured to fit with almost no gap, even if the opening / closing body 10 is slightly bent in the thickness direction due to the influence of wind, for example, Although the path s of the object sensing medium is inclined, in the present embodiment, by fitting the capturing portion 53 and the seat plate member 12 in an appropriate loose fit, the opening / closing body 10 is slightly affected by the influence of wind or the like. The path s of the obstacle sensing medium is tilted when the opening / closing body 10 bends relatively large due to the contact of the obstacle from the thickness direction of the opening / closing body without tilting the path s of the obstacle sensing medium due to the bending. ing.

According to the non-contact sensing means 50 configured as described above, during the closing operation of the opening / closing body 10, each of the discharge-side non-contact sensing unit 50a and the capture-side non-contact sensing unit 50b is closer to the closing direction than the seat plate member 12. In the projecting state, the guide piece 21 is guided in the guide rail 20 and moves integrally with the opening / closing body 10 in the opening / closing body closing direction (see FIG. 9).
During the closing operation of the opening / closing body 10, an obstacle enters the path s of the obstacle sensing medium, an obstacle contacts the seat plate member 12, or the seat plate member 12 from the opening / closing body thickness direction side. When an obstacle comes into contact or the like, the opening / closing body 10 stops or reverses the closing operation.

Each of the discharge-side non-contact sensing unit 50a and the capture-side non-contact sensing unit 50b moves in the opening / closing body opening direction relative to the opening / closing body 10 when contacting the contact target portion p.
Then, the lower end of the discharge-side non-contact sensing unit 50a and the capture-side non-contact sensing unit 50b and the lower end of the seat plate member 12 are substantially flush with each other by the contact with the contact target site p. The closing operation of the body 10 stops.

When the opening / closing body 10 is opened from the closed state, each of the discharge-side non-contact sensing unit 50a and the capture-side non-contact sensing unit 50b is closed relative to the opening / closing body 10 by its own weight. Slide in the direction.
Therefore, each of the discharge-side non-contact sensing unit 50a and the capture-side non-contact sensing unit 50b is again protruded downward from the opening / closing body 10 to be able to sense an obstacle.

  The switchgear A shows a particularly preferable mode in which an example of the obstacle sensing structure for switchgear according to the present invention is applied. However, the configuration of each part described above can be replaced or used together with other configurations. This will be described in detail below.

The contact sensing means 40 is not limited to the configuration of the opening / closing device A as long as it is disposed at the end of the opening / closing body 10 on the closing direction side and senses the contact of an obstacle with the end. Preferably, as in the opening / closing device A, a movable member 12b operable by contact with an obstacle is provided at an end of the opening / closing body 10 on the closing direction side, and the operation by the movable member 12b is performed by the proximity sensing unit 51. It is configured to detect non-contact.
In the contact sensing means 40, according to the opening / closing device A, the proximity sensing unit 51 senses the rotating member 12c operated by the movable member 12b, but directly senses the movable member 12b. Alternatively, other members operated by the movable member 12b may be sensed.
Further, according to the opening / closing device A, the contact sensing means 40 is a seat plate member that extends over substantially the entire length in the opening / closing body width direction so that an obstacle can be detected at any part in the width direction of the opening / closing body 10. However, as another aspect, at the end of the opening / closing body 10 on the closing direction side, one or more movable members are partially arranged in the width direction of the opening / closing body, and the operation of the movable member is performed. It may be perceived.
Further, according to the opening / closing device A, the contact sensing means 40 has a preferred mode in which the rotation restricting portion 12c1 is non-contact sensed by the proximity sensing portion 51 such as a proximity switch. A contact-type sensing switch (for example, a limit switch, a micro switch, a pressure-sensitive switch, a reed switch, etc.) is used for contact sensing, or a movable part other than the rotation restricting portion 12c1 is a non-contact-type sensing switch such as a proximity switch, It is also possible to have a structure for sensing by a contact type sensing switch.

Further, the non-contact sensing means 50 includes a discharge part 52 and a capture part 53 so as to protrude from the end of the opening / closing body 10 on the closing direction side in the opening / closing body closing direction. As long as the obstacle entering the path s of the obstacle sensing medium to be released is detected by the capturing unit 53, the configuration is not limited to the above-described opening / closing device A.
That is, according to the opening / closing device A, the non-contact sensing means 50 has the discharge portion 52 disposed on one end side in the opening / closing body width direction and the capture portion 53 disposed on the other end side. Although the path s of the obstacle sensing medium is formed between the parts 53, as another aspect, both the discharge part 52 and the capturing part 53 are arranged on one end side in the opening / closing body width direction, and the other end A reflection member (for example, a so-called reflector) that reflects the obstacle sensing medium emitted from the emission unit 52 toward the capture unit 53 is disposed on the side, and between the emission unit 52 and the capture unit 53 and the reflection member. In addition, a reciprocating path of the obstacle sensing medium may be formed.

  In addition, according to the opening / closing device A, the emission unit 52 and the capture unit 53 are configured by photoelectric sensors using infrared rays as an obstacle sensing medium. However, as another aspect, microwaves may be used as the obstacle sensing medium. It is also possible to adopt a mode using laser light, ultrasonic waves, millimeter waves, or the like. In particular, when configured by a radar device using ultrasonic waves or millimeter waves, only the emitting part 52 and the capturing part 53 are arranged on one end side in the opening / closing body width direction (a structure without a reflector). it can.

The means for supporting the non-contact sensing means 50 in a free hanging manner is not limited to the configuration of the opening / closing device A. For example, the discharge-side non-contact sensing unit 50a and the capture-side non-contact sensing unit 50b It is also possible to adopt a configuration in which each of these is suspended from the lower end of the opening / closing body 10 by a flexible string-like body (for example, a string, a wire, a chain, or the like).
This means shows a mode in which the non-contact sensing means 50 can be slightly swung in the width direction of the opening / closing body according to the opening / closing device A, but this means includes the non-contact sensing means 50 as the opening / closing body. The aspect etc. which enabled rocking | fluctuation in one direction or both directions of the width direction and the opening-and-closing body thickness direction are included.

Further, although the inspection unit 23 is provided on the lower end side of the guide rail 20 according to the opening / closing device A, the guide rail so as to enable the inspection of the non-contact sensing means 50 at the position where the opening / closing body 10 is opened. 20 may be disposed on the upper end side of the guide rail 20 and may be provided from the upper end side to the lower end side of the guide rail 20.
Further, the inspection portion 23 is not configured by the opening and the lid member as described above, but the guide rail 20 is divided or combined in the length direction so that the length of the guide rail 20 in the length direction is reduced. It is good also as a structure by which one part is attached or detached.
Further, the inspection unit 23 may be configured to be opened and closed by a lid member that slides and rotates.

  The reflecting means 12d is not limited to the illustrated example as long as it reflects the obstacle sensing medium in a direction other than the capturing unit 53. For example, the surface of the seat plate member 12 in the opening / closing body closing direction is not limited. It is good also as the aspect formed in uneven | corrugated form, such as the aspect formed in the inclined shape with the single board, the shape which has the waveform, the rib, and the groove | channel on the same surface. Further, the reflecting means 12d may be configured integrally with the seat plate member 12 by forming the lower surface of the seat plate member 12 itself into the shape described above.

Further, the erroneous reflection preventing means detects an obstacle by one or both of the end of the opening / closing body 10 in the closing direction and the contact target portion p that is contacted by the opening / closing body 10 to be closed. Any configuration that prevents the medium from being reflected and captured by the capturing unit 53 is not limited to the configuration of the opening / closing device A.
That is, the erroneous reflection prevention means is configured by the configuration in which the reflection means 12d and the emission part 52 are inclined according to the opening / closing device A. For example, from the obstacle detection medium transmission means that transmits the obstacle detection medium. It is also possible to adopt an aspect comprising an obstacle sensing medium absorbing means for absorbing an obstacle sensing medium.
As a specific example of the obstacle sensing medium transmitting means, a through hole such as one or a plurality of slit holes or other shaped holes is formed on the end face of the seat plate member 12 on the opening / closing body closing direction side, What is necessary is just to comprise so that an obstruction sensing medium may be permeate | transmitted to this end surface by forming an end surface with a light transmissive material.
In addition, as a specific example of the obstacle sensing medium absorbing means, for example, the end face of the seat plate member 12 on the opening / closing body closing direction side is black so that the obstacle sensing medium is absorbed to the extent that the obstacle sensing medium is not reflected to the capturing unit 53. Or the like, or a member such as black, or a rubber material may be attached. Particularly, according to the aspect where the rubber material is attached, the impact when the opening / closing body 10 is closed. It can have an absorption effect.
In the case where the erroneous reflection preventing means is constituted by the obstacle sensing medium transmitting means or the obstacle sensing medium absorbing means, the inclined surface of the lower end of the opening / closing body 10 as in the above-described embodiment (specifically, both inclined pieces) The parts 12d1, 12d1) can be omitted, and the part cost can be reduced to improve productivity.

Further, the erroneous reflection preventing means is an appropriate combination of the reflecting means 12d, the means in which the emission part 52 is inclined as described above, the obstacle sensing medium transmitting means, the obstacle sensing medium absorbing means, and the like. It is also possible to adopt an embodiment.
The part where the reflecting means 12d, the obstacle sensing medium transmitting means, the obstacle sensing medium absorbing means, and the like are disposed is not limited to the end of the opening / closing body 10 in the closing direction. Any one or both of the end portion in the closing direction of the body 10 and the contact target portion p that is contacted by the opening / closing body 10 may be used.

In addition, the sensing unit protection means is a part of the non-contact sensing means 50 when the opening / closing body 10 is in the closed state and the part that releases, captures, or reflects the obstacle sensing medium, As long as it is configured to prevent foreign matter such as dust, condensed water, and cloudy film from adhering thereto, it is not limited to the configuration of the opening / closing device A.
For example, both the emission part 52 and the capture part 53 are arranged on one end side in the opening / closing body width direction, and a reflection member (for example, a so-called reflector) that reflects an obstacle sensing medium toward the capture part 53 on the other end side. When the non-contact sensing means is configured by disposing, the structure may be such that foreign matter is prevented from adhering to the emitting part 52 and the capturing part 53, and the reflection is also possible. It is good also as a structure which prevented that a foreign material adheres with respect to a member.
In addition, according to the opening / closing device A, the closing plate 12e at the end in the width direction of the opening / closing body 10 is brought close to the parts such as the discharge portion 52 and the capturing portion 53. In order to prevent this, a part such as the discharge part 52 and the capture part 53 may be covered with an end part in the width direction of the opening / closing body 10 (specifically, an end part in the width direction of the seat plate member 12).

  Further, in the case where the sensing unit protecting means is configured to include the wiping member 12f, the wiping member 12f is a part of the contact sensing means 50 and emits, captures, or reflects an obstacle sensing medium. Cleaning foreign matter (including dust, dust, condensed water, cloudy film, etc.) adhering to the site, specifically the emission surface of the emission part 52, the acquisition surface of the acquisition part 53, the reflection surface of the reflector, etc. As long as it is possible, specific examples include brushes, cloths, natural or synthetic skins, and the like.

  Further, the sensing transmission means for transmitting a sensing command when an obstacle is sensed by one or both of the contact sensing means 40 and the non-contact sensing means 50 to the control unit of the switchgear A is a wired type as in the present embodiment. It may be a wireless system.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing an example of a switchgear to which an obstacle sensing structure for a switchgear according to the present invention is applied, with a main part cut away. The principal part perspective view of the obstruction detection structure for the switchgear. The principal part disassembled perspective view of the obstacle detection structure for the switchgear. (IV)-(IV) sectional view taken on the line in FIG. (V)-(V) sectional view taken on the line in FIG. Sectional drawing which shows operation | movement of a contact detection means sequentially to (a) and (b). Sectional drawing explaining an effect | action of a reflection means. The schematic diagram which shows the effect | action by making the discharge | release part inclined. Sectional drawing which shows operation | movement of a non-contact sensing unit sequentially to (a) and (b).

Explanation of symbols

10: Opening and closing body 12: Seat plate member 12d: Reflecting means (false reflection preventing means)
12e: Closure plate (sensor protection means)
12f: wiping member (sensing unit protecting means)
20: Guide rail 21: Guide piece 23: Inspection unit 40: Contact sensing means 50: Non-contact sensing means 50a: Emission-side non-contact sensing unit 50b: Capture-side non-contact sensing unit 51: Proximity sensing unit 52: Emission unit 53: Capture part 54: Unit main body 55: Weight adjustment member A: Opening / closing device p: Contact target part

Claims (3)

In the obstacle detection structure for an opening / closing device provided at least in an opening / closing body operable downward, and detecting an obstacle on a lower side than the opening / closing body,
Non-contact sensing means and sensing part protection means are provided at the lower end of the opening / closing body,
The non-contact sensing means includes one unit main body projecting downward from one end side in the width direction of the opening / closing body and the other unit main body projecting downward from the other end side in the width direction of the opening / closing body. In addition, the obstacle sensing medium is released in the width direction of the opening / closing body from the discharge portion provided in the one unit body, and the obstacle entering the path of the obstacle sensing medium is placed in the other unit body. Configured to be sensed by a capture unit provided;
Each unit body is provided so as to slide in a vertical direction with respect to the opening / closing body with a predetermined end in the width direction of the opening / closing body,
Each of the discharge part and the capture part is arranged at a predetermined interval closer to the upper side than the lower end of the opening / closing body closing direction of each unit body,
The sensing unit protection means includes a closing plate that closes an opening formed at an end in the width direction of the opening / closing body, and this closing plate is used in the operation of the opening / closing body immediately before closing in each unit body. Accordingly, when the opening / closing body is in a closed state by being brought close to and opposed to the discharge section or the capture section when sliding in the opening / closing body opening direction, a foreign matter is placed on the discharge section or the capture section. Is configured to prevent adhesion ,
The obstacle detection device for an opening / closing device, wherein the discharge portion or the capturing portion is provided in a position close to and opposed to the closing plate from one side in the opening / closing body width direction in the unit main body . The obstacle detection device for a switchgear according to claim 1, wherein a wiping member for dropping attached foreign matter is disposed on the surface of the closing plate . The unit main body has a substantially rectangular parallelepiped frame shape that is long in the vertical direction, and has an opening for guiding an end in the width direction of the opening / closing body from above on an upper end surface thereof, on one end surface in the opening / closing body width direction, It has an opening for the end of the opening / closing body in the width direction, and is formed so that the closing plate is brought close to and opposed to the discharge part or the capturing part in both openings. The obstacle sensing device for a switchgear according to claim 1 or 2.

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