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CN-114730671-B - Safety switch and equipment with door

CN114730671BCN 114730671 BCN114730671 BCN 114730671BCN-114730671-B

Abstract

Provided is a safety switch capable of improving the visibility of the display of the detection result of an abnormality detected by the safety switch. The safety switch (200) includes a sensor body (210) and an actuator (250). The sensor body (210) includes a detection unit that detects the actuator (250) when the actuator (250) is disposed at a predetermined position with respect to the sensor body (210), and a light projection unit configured to project light according to a detection result of the detection unit. The actuator (250) includes a light emitting unit configured to emit visible light in response to receiving light projected by the light projecting unit.

Inventors

  • HIBA TAKASHI
  • See wave cainai

Assignees

  • 松下知识产权经营株式会社
  • 松下知识产权经营株式会社

Dates

Publication Date
20260421
Application Date
20201124
Priority Date
20200124

Claims (10)

  1. 1. A safety switch, comprising: A sensor body, and The actuator is arranged to be coupled to the housing, Wherein the sensor body comprises: A detection unit configured to detect the actuator when the actuator is disposed at a predetermined position with respect to the sensor body, and A light projection unit configured to project light according to a detection result of the detection unit, Wherein the actuator comprises: a light emitting unit configured to emit visible light in response to receiving the light projected by the light projecting unit, Wherein the actuator comprises: A light guiding unit constituted by a light transmissive member and configured to guide light from the sensor body to the light emitting unit, and A non-light-transmitting member surrounding an outer periphery of the light guiding unit, Wherein an end portion of the light emitting unit located on the opposite side from the sensor body protrudes from an end portion of the non-light transmissive member located on the opposite side from the sensor body, and Wherein light is emitted from an inner peripheral surface and an outer peripheral surface of an end portion of the light emitting unit located on the opposite side from the sensor body, Wherein the sensor body is provided at a rear surface side of a fixed frame of the door, and the actuator is provided at a rear surface side of a movable frame of the door, Wherein the diameter of the inner peripheral surface increases from a facing side facing the sensor body toward a non-facing side such that light guided through the light guiding unit is scattered or diffused in a direction of a center line of the actuator by refraction.
  2. 2. The safety switch according to claim 1, Wherein the light projection unit projects light through a facing surface facing the actuator.
  3. 3. The safety switch according to claim 1 or 2, Wherein the light projection unit projects the visible light, and Wherein the light emitting unit is constituted by a light transmissive member.
  4. 4. The safety switch according to claim 1 or 2, Wherein the outer peripheral surface faces an outer side of the actuator on a non-facing side, which is a side opposite to the sensor body, on an outer side of the inner peripheral surface, Wherein the inner peripheral surface faces an outer side of the actuator on the non-facing side on an inner side of the outer peripheral surface, and Wherein the diameter of the outer peripheral surface decreases from a facing side facing the sensor body toward the non-facing side.
  5. 5. The safety switch according to claim 1 or 2, Wherein the outer peripheral surface faces an outer side of the actuator on a non-facing side, which is a side opposite to the sensor body, on an outer side of the inner peripheral surface, Wherein the inner peripheral surface faces an outer side of the actuator on the non-facing side on an inner side of the outer peripheral surface.
  6. 6. The safety switch according to claim 1 or 2, Wherein the light projection unit comprises a plurality of display lamps, Wherein the actuator comprises a wireless transmission unit facing the sensor body and configured to transmit a predetermined signal, Wherein the detection unit is disposed to face the wireless transmission unit and receive the predetermined signal, and Wherein the plurality of display lamps are disposed in the sensor body in a symmetrical position with respect to the detection unit.
  7. 7. The safety switch according to claim 1 or 2, Wherein the light emitting unit includes: A reflecting surface on which light from the light projecting unit is reflected in a direction perpendicular to an arrangement direction of the sensor body and the actuator, and And an emission surface on which light reflected by the reflection surface is emitted to an outside of the actuator.
  8. 8. The safety switch according to claim 1 or 2, further comprising: the extension member is provided with a plurality of protrusions, the extension member is attachable to and detachable from the actuator, Wherein the extension member is configured to guide and emit light emitted by the actuator.
  9. 9. An apparatus with a door, comprising: The safety switch according to any one of claims 1 to 8, and The door is provided with a plurality of openings, Wherein the door comprises a fixed frame, a movable frame and a door main body, Wherein the sensor body of the safety switch is provided on the fixed frame, and Wherein the actuator of the safety switch is provided on the movable frame.
  10. 10. The apparatus according to claim 9, Wherein at least a portion of the light emitting unit of the actuator is provided to protrude from an end portion of the movable frame on the opposite side from the fixed frame.

Description

Safety switch and equipment with door Technical Field The present disclosure relates to safety switches and gated devices. Background In the prior art, safety switches are known which are attached to a front door of a machine tool or machine tool, a door portion of a safety barrier surrounding an industrial robot, or the like, and detect opening and closing of the door. In such a safety switch, a dedicated actuator attached to the door (movable side) accesses the sensor body by closing the door, and emits a signal when a detection element in the body detects the access. It is well known in the art that in a safety switch including a sensor main body and an actuator, the sensor main body includes a display unit that detects opening and closing of a door and displays the opening and closing state of the door (see patent document 1). Prior art literature Patent literature Patent document 1 JP-A-2019-139877 Disclosure of Invention Technical problem The safety switch in the related art has room for improvement in displaying the detection results of the abnormality detected by the safety switch (for example, the open state and the closed state of the door). The present disclosure provides a safety switch and a device with a door capable of improving the visibility of the display of the detection result of an abnormality detected by the safety switch. Means for solving the problems An aspect of the present disclosure is a safety switch including a sensor body including a detection unit configured to detect the actuator when the actuator is disposed at a predetermined position with respect to the sensor body, and an actuator configured to project light according to a detection result of the detection unit, and including a light emission unit configured to emit visible light in response to receiving the light projected by the light projection unit. An aspect of the present disclosure is a door-mounted device comprising a door and the safety switch described above, the door comprising a fixed frame, a movable frame and a door body, the sensor body of the safety switch being disposed on the fixed frame and the actuator of the safety switch being disposed on the movable frame. The beneficial effects of the invention are that According to the present disclosure, the visibility of the display of the detection result of the abnormality detected by the safety switch can be improved. Drawings Fig. 1 is a diagram showing a configuration example of an apparatus with a door. Fig. 2 is a perspective view showing a construction example of a door. Fig. 3 is a front perspective view showing an example of a sensor body of the safety switch. Fig. 4 is a rear perspective view showing an example of a sensor body. Fig. 5 is a diagram showing an example of a substrate on which electronic components are mounted in a sensor body. Fig. 6 is a front perspective view showing an example of an actuator of the safety switch. Fig. 7 is a rear perspective view showing an example of the actuator. Fig. 8 is an exploded perspective view showing an example of an actuator. Fig. 9 is a diagram showing an example of a light-transmitting member of the actuator. Fig. 10 is a diagram showing an example of reflection of light in the light emitting unit of the light transmissive member of the actuator. Fig. 11A is a diagram showing the closing detection of the door and the display of the closing detection result. Fig. 11B is a diagram showing the opening detection of the door and the display of the opening detection result. Fig. 12A is a diagram showing a display example of a closing detection result obtained by a safety switch provided in a door. Fig. 12B is a diagram showing a display example of an open detection result obtained by a safety switch provided in a door. Fig. 13 is a diagram showing an extension option of the actuator. Fig. 14 is a diagram showing a modified configuration example of the safety switch. Detailed Description Hereinafter, embodiments will be described in detail with reference to the accompanying drawings as appropriate. However, unnecessary detailed description may be omitted. For example, duplicate descriptions of well-known things or substantially identical configurations may be omitted. This avoids unnecessary redundancy in the following description and facilitates understanding by those skilled in the art. The figures and the following description that follow are provided to fully understand the present disclosure by those skilled in the art, and are not intended to limit the subject matter described within the scope of the claims. (Introduction to the content of the examples) The sensor body and actuator of the safety switch are attached to a frame (e.g., an aluminum frame) of the door. At this time, the sensor body and the actuator are generally attached to the rear surface side of the frame of the door. This is because, when the sensor body and the actuator are attached to the front surface side, an object collides with the