JP5576232B2 - Explosion-proof device connection - Google Patents

Description

  The present invention relates to an explosion-proof device used for illumination in a hazardous area of a combustible gas atmosphere, and more particularly to a connecting member used for connecting a plurality of explosion-proof devices.

  Even in a hazardous area with a flammable gas atmosphere such as a petrochemical plant, lighting may be required when working in a dark place or at night. For this reason, an explosion-proof device in which a light source is housed in an explosion-proof container with an electrical component such as a power supply circuit has been proposed (see, for example, Patent Document 1).

  Illumination in the hazardous area has a wide range of sizes and shapes. However, if various types of explosion-proof devices with different amounts of light and shapes are prepared in accordance with the use conditions, the production efficiency decreases.

  Therefore, it is conceivable to prepare a single type of explosion-proof device that is relatively small, and to connect and use a plurality of explosion-proof devices according to the usage situation. As shown in FIG. 6, the plurality of explosion-proof devices 200 are connected by a protective tube 210 that passes through a signal line, a power supply line, and a ground line. That is, the signal line, the power line, and the ground line that penetrate the wiring fastening tool 202 protruding from the side surface 201 of each explosion-proof device 200 penetrate the protective tube 210.

JP 11-053929 A

  However, since the conventional explosion-proof device is connected by a protective tube outside the explosion-proof container in each explosion-proof device, the connecting portion becomes long. In addition, a plurality of explosion-proof devices are connected only in a single direction, and it is not easy to change the angle at the connection part, and there are cases where it is not possible to cope with various usage situations. Also, it is impossible to give a sense of unity to the whole of a plurality of connected explosion-proof devices.

  An object of the present invention is to provide a connection member for an explosion-proof device capable of integrally connecting a plurality of explosion-proof devices in a linear or orthogonal direction.

  The coupling member for an explosion-proof device according to the present invention is disposed between the side surfaces for wiring in which the wiring fastening tool in each of two explosion-proof devices having the same shape protrudes, and includes a connection surface and an insulator. The connection surface constitutes at least two surfaces, has the same outer shape as the wiring side surface, and includes a through hole into which the wiring fastening tool is fitted in close contact with the wiring side surface. The insulator holds the wiring exposed from the wiring clamp inside the through hole.

  According to this configuration, the two explosion-proof devices are integrally formed by the connecting members in which the connection surfaces are in close contact with the respective side surfaces for wiring in a state where the wiring fastening tools protruding from the respective side surfaces for wiring are fitted into the through holes. Connected. The wiring exposed from the wiring fastener is held by an insulator, and the explosion-proof performance is maintained.

  In this configuration, the insulator can be a packing that holds the cable exposed from the wiring clamp inside each of the connection surfaces, and a plurality of conductive wires exposed from the wiring clamp in the middle of the connection surface are connected at both ends. It can also be a holding member that holds a conductor connected to the. Depending on whether the wiring for the explosion-proof device is a cable or a loose wire, the explosion-proof performance can be maintained in an optimum state.

  Further, at least two connection surfaces can be arranged in parallel to each other, and can also be arranged in directions orthogonal to each other. A plurality of explosion-proof devices can be connected in a plurality of directions, and can cope with various usage situations.

  According to this invention, a plurality of explosion-proof devices can be integrally connected in a linear or orthogonal direction.

1 is an assembly diagram of an explosion-proof illumination device to which a connection member for an explosion-proof device according to an embodiment of the present invention is applied. It is side surface sectional drawing of the connection member for explosion-proof apparatuses which concerns on 1st Embodiment of this invention. It is side surface sectional drawing of the connection member for explosion-proof apparatuses which concerns on 2nd Embodiment of this invention. It is a figure which shows the connection state of the explosion-proof apparatus using the connection member for explosion-proof apparatuses which concerns on embodiment of this invention. (A)-(C) are figures which show the usage example of the connection member for the explosion-proof device. It is a figure which shows the connection state of the conventional explosion-proof device.

  Hereinafter, a connection member for an explosion-proof device according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, an explosion-proof illumination device 100 to which a connection member for an explosion-proof device is applied includes an explosion-proof container 101, a main body 1, a lid 2, a glass plate 3, a fastener 4, and a packing 5. The main body 1 is a casing having a rectangular window portion 11 on the front (upward in FIG. 1) 1A and opening portions 12 on both side surfaces 1B and 1C. Storing.

  In the front surface 1 </ b> A of the main body 1, holding portions 13 are integrally formed at two parallel positions sandwiching the window portion 11. The holding part 13 constitutes a groove part 14 whose opening surface is orthogonal to the front surface 1A. The two holding portions 13 are arranged with the opening surfaces of the groove portions 14 facing each other. Both ends of the groove portion 14 are open.

  The lid body 2 constitutes the wiring side surface of the present invention, is fixed to each of the side surfaces 1B and 1C of the main body 1, and closes the opening 12. A wiring clamp 21 is formed on the main body 2 so as to protrude. The wiring fastening tool 21 shields the inside of the main body 1 from the outside in a state where the power supply line, the signal line, and the ground line for the light source and the electrical component are inserted. The power line, the signal line, and the ground line are housed in a single cable, or each is wired as a separate conductive line.

  The glass plate 3 is a rectangular tempered glass having a larger area than the window portion 11, and is disposed on the holding portion front surface 1 </ b> A to cover the window portion 11. The long side of the glass plate 3 is longer than the holding part 13. A packing 6 is attached to the peripheral edge of the outer surface of the glass plate 3. The glass plate 3 should just be a translucent board | plate material, for example, can also be comprised with a transparent resin board.

  The fastener 4 is attached to the front face 1 </ b> A outside the both ends of the holding portion 13 through two through holes 41. The fastener 4 covers a portion of the glass plate 3 exposed from both ends of the holding portion 13.

  The packing 5 is an annular body having elasticity, and is disposed between the glass plate 3 and the peripheral edge portion of the window portion 11.

  A concave portion 31 into which the packing 5 is fitted is formed on the inner surface of the glass plate 3. A concave portion 32 into which the packing 5 is fitted is also formed in the peripheral portion of the window portion 11 in the front surface 1A. The arrangement position of the glass plate 3 on the front surface 1 </ b> A is defined by the packing 5. When the fastener 4 is attached to the front surface 1A in a state where the glass plate 3 is disposed at an appropriate position on the front surface 1A, the movement of the glass plate 3 in the longitudinal direction of the groove 14 is restricted, and the appropriate position on the front surface 1A of the glass plate 3 is determined. Can be fixed to.

  By inserting the glass plate 3 into the respective groove portions 14 of the two holding portions 13, the long side portion of the glass plate 3 is held by the holding portion 13 formed integrally with the front surface 1 </ b> A of the main body 1. When the glass plate 3 is fixed to the main body 1 with sufficient internal pressure strength, cost reduction, simplification of assembly work, and downsizing of the apparatus can be realized.

  As shown in FIG. 2, the explosion-proof device connection member 300 is a rectangular parallelepiped housing, and two parallel side surfaces are used as connection surfaces 310 as an example. The connection surface 310 has the same outer shape as the cross-sectional shape of the main body 1 of the explosion-proof lighting device 100, and the wiring fastening tool 21 protruding from the lid 2 of the explosion-proof lighting device 100 is inserted in the protruding direction. A hole 311 is provided.

  Inside the connection member 300 for the explosion-proof device, a packing 320 is disposed inside each through hole 311. The packing 320 is an insulator according to the present invention, and sandwiches the cable 330 exposed from the wiring fastening tool 21. The two packings 320 are disposed in close contact with the inner peripheral surface of the communication hole 340 communicating with the two through holes 311. Thereby, the explosion-proof performance inside the explosion-proof device connecting member 300 is maintained.

  In addition, by removing the lid 360 attached to the bottom surface 350 to form a new through hole and disposing another packing 320, the two side surfaces orthogonal to each other can be used as the connection surface 310. In this case, one side which is not connected can be closed.

  As shown in FIG. 3, by disposing an insulating holder 370 sandwiching the three conductors 380 in close contact with the inner peripheral surface of the communication hole 340 inside the coupling member 300 for the explosion-proof device, A case where the power supply line, the signal line, and the ground line are wired as individual conductive lines can be handled. In this case, the holder 370 corresponds to the insulator of the present invention, and the explosion-proof performance in the explosion-proof device connecting member 300 can be maintained by the holder 370.

  By using the explosion-proof device connection member 300 shown in FIG. 2 or 3, the through-hole 371 provided in the explosion-proof device connection member 300, the through-hole 22 provided in the lid 2, and the side surface of the main body 1 are provided. The explosion-proof device connecting member 300 is fixed to the explosion-proof lighting device 100 by tightening the screw 381 through the screw 381. As a result, the two explosion-proof illumination devices 100 are integrally connected as shown in FIG. Further, by setting the two surfaces orthogonal to each other as the connection surface 310, a plurality of explosion-proof illumination devices 100 can be integrally connected to each other as shown in FIGS. 5 (A) and 5 (B).

  Furthermore, by using three surfaces as connection surfaces, three explosion-proof illumination devices 100 can be integrally connected in a T-shape as shown in FIG. 5C, and three or more explosion-proof illumination devices can be connected. 100 can be integrally connected in a three-dimensional shape.

  The above description of the embodiment is to be considered in all respects as illustrative and not restrictive. The scope of the present invention is shown not by the above embodiments but by the claims. Furthermore, the scope of the present invention is intended to include all modifications within the meaning and scope equivalent to the scope of the claims.

  For example, the explosion-proof device is not limited to the explosion-proof lighting device 100 having a lighting function, and the explosion-proof device connecting member of the present invention is also applied to a gas-proof device having a photoelectric switch function and an explosion-proof device having an image display function. Applicable to.

100-Explosion-proof lighting device (explosion-proof device)
300-Explosion-proof device connection member 310-Connection surface 311-Through hole 320-Packing (insulator)
370-Holder (Insulator)

Claims (5)

A coupling member for an explosion-proof device, which is disposed between the wiring side surfaces from which the wiring fastening tool in each of the two explosion-proof devices having the same shape protrudes, and is used for electrical connection of the plurality of explosion-proof devices,
Each of at least two surfaces is a connection surface that has the same outer shape as the wiring side surface and includes a through hole into which the wiring fastening tool is fitted in close contact with the wiring side surface.
A connection member for an explosion-proof device provided with an insulator inside that holds the wiring exposed from the wiring fastening tool inside the through hole.   The explosion-proof device connection member according to claim 1, wherein the insulator is a packing that holds a cable exposed from the wiring fastening tool inside each of the connection surfaces.   The explosion-proof device connection member according to claim 1, wherein the insulator is a holder that holds a conductor to which a plurality of conductive wires exposed from the wiring fastening tool are connected to both ends at an intermediate portion of the connection surface.   The connection member for an explosion-proof device according to any one of claims 1 to 3, wherein the connection surfaces are arranged in parallel to each other.   The connection member for an explosion-proof device according to any one of claims 1 to 3, wherein the connection surfaces are arranged so as to be orthogonal to each other.

Images