JP2005310763A - In-tunnel lighting system, connector for tunnel luminaire, and dimming control cable with plug for tunnel luminaire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connector for tunnel luminaire capable of easily pulling out a plug even when a cable having four cores is used as a dimming control cable. <P>SOLUTION: The plug 11 is provided with a plug housing 12 wherein a body 12b having a large diameter and a tip 12a having a small diameter and inserted into a receptacle 17 are integrally formed, and the body is integrally formed with an insulating coating of the dimming control cable 6; and plug side contacts 16a to 16b provided in the plug housing and connected to a core wire of the cable 6. When the plug 11 is connected to the receptacle 17, a protruding positioning mark 19 used for determining the direction of the plug is formed on an outer periphery of the body 12b of the plug housing 12. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an in-tunnel illumination device that illuminates the inside of a tunnel, a connector for a tunnel illuminator used to connect a dimming control cable to an illuminator installed in the tunnel, and a series of luminaires installed in the tunnel. The present invention relates to a dimming control cable with a plug for a tunnel lighting fixture used to connect adjacent lighting fixtures when a dimming circuit is connected in series to supply a dimming control signal to a series of lighting fixtures. .

  As shown in FIG. 9, a large number of lighting fixtures 1, 1,... Are installed in the tunnel with a predetermined interval. Each lighting fixture is basically composed of a case and a light emitter housed in the case, but in some cases, a dimmer for dimming the light emitter according to a control signal given from the outside. May be provided in the case. A power cable 2 is laid in the tunnel, and a branch line 4 branched from a branch portion 3 of the power cable 2 provided in the vicinity of each lighting fixture is connected to each lighting fixture and supplied with power to each lighting fixture. The branch line 4 penetrates the case 5 of the lighting fixture 1 through a bushing and is electrically connected to a light emitter or the like.

  When a dimmer is provided in each lighting fixture, in order to give a control signal to the dimmer of each lighting fixture, between adjacent lighting fixtures is connected through the dimming control cable 6, A control signal is given to the dimmers of the series of luminaires 1, 1,... Through the dimming control cable 6 that connects between the lighting fixtures adjacent to the circuit.

  Conventionally, a sodium lamp that emits yellow-orange light has been used as a light emitter used in a lighting fixture of a lighting device in a tunnel, but recently, a sodium lamp is replacing a fluorescent lamp that emits white light. When a dimmer is provided in a tunnel lighting fixture using a fluorescent lamp, at least two signal lines are required to give a control signal to the dimmer. When performing complicated control such as switching the light quantity of the fluorescent lamp in multiple stages, a maximum of four signal lines may be required.

  FIG. 10 shows a dimming control cable 6 used for connecting adjacent lighting fixtures 1 and 1 in a conventional tunnel lighting device, and a connection portion between the dimming control cable and the lighting fixture 1. It shows the configuration. The dimming control cable 6 is a four-core cable having first to fourth core wires 9a, 9b, 9c and 9d covered with an insulating coating colored in red, white, black, blue or the like for distinction. It has become. Both ends of the dimming control cable 6 penetrate the cases 5 and 5 of the adjacent lighting fixtures 1 and 1 through the bushings 7 and 7, respectively, and are introduced into the cases of the lighting fixtures 1 and 1.

  A terminal block 8 having first to fourth terminals 8a, 8b, 8c and 8d is provided in the case 5 of each lighting fixture, and the terminal portion of the dimming control cable 6 introduced into the case of each lighting fixture. The first to fourth core wires 9a, 9b, 9c and 9d drawn out from are screwed to the first to fourth terminals 8a, 8b, 8c and 8d through terminal fittings, respectively. The terminal block 8 is also provided with terminals 10a, 10b, 10c and 10d electrically connected to the first to fourth terminals 8a, 8b, 8c and 8d, respectively, and these terminals 10a, 10b, 10c and 10d. Is electrically connected to a dimmer (not shown) provided in the case 5.

  As described above, in the conventional in-tunnel lighting device, the core wires 9a, 9b, 9c and 9d led out from the terminal portion of the dimming control cable 6 are connected to the terminal block 8 provided in the case of the lighting fixture. Although the terminals 8a, 8b, 8c, and 8d are screwed through the terminal fittings, the work of screwing the terminal fittings in the dark tunnel is poor in work efficiency, takes time, and may be erroneously connected. There was a problem.

  Therefore, the inventor previously attached connector plugs to both ends of the dimming control cable, and previously attached the receptacle of the connector to the case of the lighting fixture, and each receptacle of the dimming control cable in the tunnel. We considered connecting the dimming control cable to the luminaire by connecting to the receptacle of the corresponding luminaire. In this way, when the dimming control cable and the lighting fixture are connected using the connector, the work of connecting the dimming control cable to the lighting fixture is performed more efficiently than when the terminal fitting is screwed. be able to.

Since dew condensation is likely to occur in the tunnel, as described above, when the dimming control cable is connected to the lighting fixture via the connector in the tunnel, it is necessary to use a connector having a waterproof structure. As a connector having a waterproof structure, the connector disclosed in Patent Document 1 is known. The receptacle of the connector shown in Patent Document 1 includes a receptacle housing and a receptacle-side contact accommodated in the housing, and a male screw portion provided in the receptacle housing is provided in a case of an electric device. It is introduced into the case of the electric device through the mounting hole, and is fixed to the electric device by tightening a nut screwed into the male screw portion in the case. The plug also includes a plug housing and a plug-side contact provided in the plug housing and connected to the cable core, and the tip of the plug housing is inserted into a recess provided in the receptacle housing. As a result, the plug-side contact is connected to the receptacle-side contact. In the connector disclosed in Patent Document 1, since the receptacle mounting portion has a waterproof structure, a packing is interposed between the receptacle housing and the peripheral portion of the mounting hole of the case of the electric device, and the packing is secured by tightening the nut. By compressing, the mounting portion of the receptacle is kept liquid-tight.
Japanese Utility Model Publication No. 55-18936

  As described above, in the conventional tunnel lighting device, the core wire led out from the terminal portion of the dimming control cable is screwed to the terminal of the terminal block provided in the case of the lighting fixture via the terminal fitting. Therefore, there is a problem that the work efficiency of connecting the dimming control cable to the lighting fixture is poor, takes time, and there is a risk of erroneous connection.

  In order to solve this problem, it is conceivable to take a configuration in which the dimming control cable is connected to each lighting fixture via a waterproof connector, but when a conventional waterproof connector as shown in Patent Document 1 is used. However, there is a problem in that it is difficult to perform the work of connecting the receptacle with the correct position around the axis of the plug by hand in a dark tunnel.

  Furthermore, in the conventional waterproof connector, there was no means for regulating the compression amount of the packing to keep the receptacle mounting portion liquid-tight, so when the nut was overtightened, the packing was excessively compressed and damaged, and the receptacle There was a possibility that the mounting portion could not be liquid-tight.

  A first object of the present invention is to provide an in-tunnel lighting device that can easily connect a dimming control cable and a lighting fixture in a tunnel.

  Another object of the present invention is to make it possible to connect a dimming control cable to a lighting fixture without causing a risk of erroneous connection even in a dark tunnel by properly aligning the positions around the axis of the plug. It is providing the connector for lighting fixtures.

  Still another object of the present invention is to provide a connector for a tunnel luminaire that eliminates the possibility of damage caused by excessive compression of a packing for liquid-tightening a mounting portion of a receptacle.

  Still another object of the present invention is to provide a dimming control cable for a tunnel luminaire having both ends of a plug that can be easily connected to a receptacle attached to the luminaire even in a dark tunnel. It is in.

  The present invention is connected to each luminaire in order to give a control signal to a plurality of luminaires installed at predetermined intervals in the tunnel and a dimmer provided in each of the luminaires. In-tunnel lighting devices equipped with a dimming control cable. In the present invention, each of the plurality of lighting fixtures and the dimming control cable are connected via a connector having a plug and a receptacle. Further, a convex or concave alignment mark used for aligning the position around the axis of the plug when connecting the plug to the receptacle is provided on each of the plug and the receptacle.

  In a preferred aspect of the present invention, the dimming control cable is provided in common for a plurality of lighting fixtures, and each lighting fixture branched from the main dimming control cable at the installation location of each lighting fixture. Branch dimming control cables, and each branch dimming control cable is connected to a corresponding lighting fixture via a connector comprising a plug and a receptacle. Also in this case, convex or concave alignment marks used for aligning the positions around the axis of the plug when the plug is connected to the receptacle are provided on each of the plug and the receptacle.

  As described above, when the connection between each lighting fixture and the dimming control cable is performed via a connector including a plug and a receptacle, the connection work between the dimming control cable and the lighting fixture in the tunnel can be easily performed. can do. In particular, in the present invention, the convex and concave alignment marks used for alignment around the axis of the plug when the plug is connected to the receptacle are provided on the plug and the receptacle, so that the alignment of the plug can be achieved even in a dark tunnel. Thus, the connection work between the dimming control cable and the lighting fixture can be performed efficiently.

  The present invention also provides a receptacle attached to a case of a lighting fixture for giving a control signal to the dimmer in the lighting fixture installed in the tunnel, and a dimming control cable for transmitting the control signal given to the dimmer And a connector for a tunnel luminaire having a plug attached to the terminal portion of the terminal and connected to the receptacle.

  In the present invention, the plug has a large-diameter main body and a small-diameter tip inserted into the receptacle, and the main body is integrated with the insulation coating of the cable; And a plug-side contact connected to the core of the cable.

  Also, a convex or concave alignment mark used for determining the orientation of the plug when connecting the plug to the receptacle is formed on the outer periphery of the main body of the plug housing.

  If the plug housing main body is formed with a diameter larger than the tip as described above, the plug housing can be easily gripped. Therefore, as in the case of using a 4-fiber dimming control cable, Even when the number is large, the plug can be easily connected and disconnected. In addition, if a convex or concave alignment mark is formed on the outer periphery of the plug housing body as described above, the position of the alignment mark can be confirmed by groping, so the relative relationship between the plug and the receptacle in the circumferential direction can be confirmed even in a dark tunnel. The target positional relationship can be easily confirmed. Therefore, it is possible to prevent erroneous plug connection and facilitate plug connection work.

  In a preferred embodiment of the present invention, a pair of annular ridges extending in the circumferential direction of the main body of the plug housing are provided on the outer periphery of the main body of the plug housing at intervals in the longitudinal direction of the plug housing. It is formed between a pair of ridges.

  If comprised as mentioned above, since a force can be easily applied to a plug housing by putting a finger on a pair of annular ridges, the plug can be easily pulled off. In addition, if the alignment mark is provided between the annular ridges as described above, the alignment mark can be searched using the ridges as a mark, so it is easy to confirm the position of the alignment mark in the dark tunnel. It can be carried out.

  In a preferred aspect of the present invention, the receptacle integrally has a large-diameter portion and a small-diameter male screw portion extending in the axial direction from the rear end portion side of the large-diameter portion, and receives the distal end portion of the plug housing. A receptacle housing in which a male screw portion is introduced into the lighting fixture through a mounting hole provided in the case of the lighting fixture, and a tip end portion of the plug housing is received in the receptacle housing. A receptacle-side contact that is brought into contact with the plug-side contact when inserted into the socket, a nut screwed into the male screw portion, a large-diameter portion and a small-diameter male screw portion of the receptacle housing that are fitted into the male screw portion. Remove the packing between the step formed between and the periphery of the mounting hole of the luminaire case and the nut and the periphery of the mounting hole. And an annular packing restricting member provided so as to surround the housing, and when the nut is tightened to the receptacle housing side and the periphery of the mounting hole of the luminaire case comes into contact with the packing restricting member, The axial length of the packing restricting member is set so that the amount of compression is appropriate.

  With the above configuration, it is possible to prevent the packing from being excessively compressed by tightening the nut for fixing the receptacle too much. It can be prevented from being lost.

  In a preferred aspect of the present invention, a convex or concave receptacle-side alignment mark corresponding to the plug alignment mark is also provided on the outer periphery of the housing body of the receptacle housing. A groove for fitting a positioning projection formed on the inner periphery of the mounting hole provided in the case of the lighting fixture is formed on the outer periphery of the male screw portion of the receptacle housing.

  As described above, if a convex or concave alignment mark is also provided on the receptacle housing, the positional relationship between the plug and the receptacle can be confirmed more easily, so the dimming control cable in the tunnel The efficiency of connection work can be improved. Further, as described above, when the groove for fitting the positioning protrusion formed on the inner periphery of the mounting hole provided in the case of the lighting fixture is provided on the outer periphery of the male screw portion of the receptacle housing, the receptacle housing When attaching to the case of the lighting fixture, positioning of the receptacle housing can be facilitated.

  The present invention also provides a dimming control cable having first to fourth cores for transmitting a control signal to be supplied to a dimmer of a lighting fixture installed in the tunnel, and one end and the other end of the cable. Intended is a dimming control cable with a plug for a tunnel luminaire having a pair of plugs attached thereto.

  In the present invention, each of the pair of plugs integrally has a large-diameter main body and a small-diameter tip inserted into a receptacle attached to a lighting fixture, and the main body is an insulation of the dimming control cable. A plug housing integrated with the sheath; and first to fourth plug-side contacts provided in the plug housing and connected to the first to fourth core wires of the dimming control cable, respectively. A convex or concave alignment mark used for determining the orientation of the plug when connecting to the receptacle is formed on the outer periphery of the main body of the plug housing.

  The dimming control cable is arranged so that the first to fourth plug-side contacts connected to the first to fourth core wires are aligned in the same direction when the end faces of the pair of plugs are viewed in the axial direction. The first to fourth core wires and the first to fourth plug-side contacts of each of the pair of plugs are connected in the plug housing.

  As described above, the first to fourth plug-side contacts respectively connected to the first to fourth core wires are arranged in the same direction when the end faces of the pair of plugs are viewed from the axial direction. When the first to fourth cores of the dimming control cable and the first to fourth plug-side contacts of each of the pair of plugs are connected in the plug housing, the connection between all plugs and receptacle contacts Therefore, the plugs attached to both ends of the dimming control cable can be connected to the receptacle in the same direction, so that erroneous plug connection can be reliably prevented.

  As described above, according to the present invention, since each luminaire and the dimming control cable are connected via the connector including the plug and the receptacle, the dimming control cable and the luminaire in the tunnel are used. Can be easily connected. In particular, in the present invention, the convex and concave alignment marks used for alignment around the axis of the plug when the plug is connected to the receptacle are provided on the plug and the receptacle, so that the alignment of the plug can be achieved even in a dark tunnel. Thus, the connection work between the dimming control cable and the lighting fixture can be performed efficiently.

  In the connector for a tunnel lighting fixture according to the present invention, the plug housing body is formed to have a diameter larger than that of the tip so that the plug housing can be easily grasped. Even when the number of cores of the control cable is large, the plug can be easily connected and disconnected. In the present invention, a convex or concave alignment mark is formed on the outer periphery of the main body of the plug housing so that the position of the alignment mark can be confirmed by groping. Therefore, the relative relationship between the plug and the receptacle in the circumferential direction can be confirmed even in a dark tunnel. The target positional relationship can be easily confirmed. Therefore, it is possible to prevent erroneous plug connection and facilitate plug connection work.

  In the present invention, a pair of annular ridges extending in the circumferential direction of the main body of the plug housing are provided on the outer periphery of the plug housing in a state of being spaced apart in the longitudinal direction of the plug housing. When the set mark is formed, a force can be easily applied to the plug housing by placing a finger on the pair of annular ridges, so that the plug can be easily pulled off. In addition, if an alignment mark is provided between the annular ridge portions, the alignment mark can be searched for using the ridge portion as a mark, so that the position of the alignment mark in a dark tunnel can be easily confirmed. .

  Further, in the present invention, an annular packing restricting member is provided so as to surround the packing for liquid tightness of the attachment portion of the receptacle from the outside, and the nut is fixed when the nut for fixing the receptacle housing to the case of the lighting fixture is tightened. When the nut abuts against the packing restricting member and the amount of displacement of the nut is limited, it is possible to prevent the packing from being excessively compressed by overtightening the nut that secures the receptacle. It is possible to prevent the packing from being damaged due to over-tightening and liquid-tightness of the receptacle mounting portion cannot be achieved.

  In the present invention, when the end faces of the pair of plugs are viewed from the axial direction, the first to fourth plug-side contacts respectively connected to the first to fourth core wires are arranged in the same direction. When the first to fourth cores of the dimming control cable and the first to fourth plug-side contacts of each of the pair of plugs are connected in the plug housing, all plugs and receptacles are connected. The plugs attached to both ends of the dimming control cable can be connected to the receptacle in the same direction with the same correspondence between the contacts, so that erroneous plug connection can be reliably prevented.

Hereinafter, with reference to FIG. 1 thru | or FIG. 9, the preferable form at the time of implementing the connector for tunnel lighting fixtures which concerns on this invention is demonstrated in detail.
FIG. 8A shows an example of the configuration of an in-tunnel lighting device according to the present invention. The illustrated lighting device has a plurality of lighting fixtures 1, 1 and 1 installed at predetermined intervals in the tunnel. ... and a dimming control cable 6 for connecting adjacent lighting fixtures in order to give control signals to the dimmers provided inside each of the plurality of lighting fixtures.

  Each of the plurality of lighting fixtures 1, 1,... And the dimming control cable 6 is connected via a connector 100 including a receptacle 17 attached to a case of the lighting fixture and a plug 11 connected to the receptacle. It is done. As described later, the plugs and receptacles of each connector are provided with convex or concave alignment marks used to align the positions of the plugs 11 around the axis when the plug 11 is connected to the receptacle 17.

  In this embodiment, a four-core cable is used as a dimming control cable that gives a control signal to the dimmer of the lighting fixture. As shown in FIG. 3, the four-core dimming control cable 6 used in the present embodiment is a first type in which the insulation coating is colored in different colors, for example, red, white, black and blue and arranged in the circumferential direction. The first to fourth core wires 9a to 9d are provided, and these core wires are collectively covered with the insulating layer 14.

  As shown in FIG. 7, a pair of plugs 11 and 11 are attached to both ends of the dimming control cable 6, and the dimming control cable 6 and the pair of plugs 11 and 11 constitute a dimming control cable with a plug. Yes. Each plug 11 and the receptacle 17 to which each plug is connected constitute a tunnel lighting fixture connector.

First, the configuration of plugs attached to both ends of the dimming control cable 6 will be described.
As shown in FIGS. 1, 2, 4, and 5, the plug 11 constituting the connector of this embodiment includes a large-diameter main body 12 b and a small-diameter tip portion inserted into the receptacle 17. 12a, a plug housing 12 integrally having an intermediate portion 12c formed between the main body 12b and the tip portion 12a, and first to fourth plug-side contacts 16a to 16d accommodated in the plug housing; It is comprised by. An intermediate portion 12c of the plug housing is formed to have an outer diameter slightly smaller than the main body 12b and slightly larger than the tip portion 12a. In the present embodiment, the outer diameter of the tip portion 12a is set to 19.5 mm, the outer diameter of the intermediate portion 12c is set to 20.5 mm, and the outer diameter of the main body 12b is set to 25.0 mm. The plug housing 12 is made of a molded product of an insulating resin such as vinyl chloride, and the main body 12 b is integrated with the insulating layer 14 of the dimming control cable 6.

  First to fourth plug-side contacts 16a to 16d are accommodated in the main body 12b of the plug housing 12. These plug-side contacts are female contacts (connection terminals) having a compression connection portion 15 at the base, and the dimming control cable 6 is connected to the compression connection portions 15 of the first to fourth plug-side contacts 16a to 16d, respectively. The first to fourth cores 9a to 9d are compression-connected.

  When the first to fourth cores 9a to 9d of the dimming control cable 6 are connected to the first to fourth contacts 16a to 16d of the plug, an insulating layer is formed at both ends of the dimming control cable 6. 14 is removed, and the insulation coating of the cores 9a to 9d is removed to expose the respective conductors, and the exposed conductors are connected to the corresponding contacts.

  The first to fourth plug-side contacts 16a to 16d are sequentially arranged in the circumferential direction (clockwise as viewed from the front), embedded in the main body 12b of the plug housing 12, and the first to fourth contacts. The plug-side contacts 16 a to 16 d are open at the end face of the tip end portion 12 a of the plug housing 12. Holes 22a to 22d are formed inside the first to fourth plug side contacts 16a to 16d, and a male contact of a receptacle described later is inserted into these holes.

  In FIG. 7, the connection relationship between the first to fourth cores 9a to 9d of the dimming control cable 6 and the first to fourth plug-side contacts 16a to 16d of each of the pair of plugs 11 and 11 is shown. For the sake of illustration, the first to fourth cores 9a to 9d and the first to fourth plug-side contacts 16a to 16d are identified by reference signs A to D, respectively.

  When the illustrated dimming control cable 6 is viewed from the left side, the first to fourth cores 9a to 9d are arranged in a clockwise direction, whereas when the dimming control cable 6 is viewed from the right side, the first to fourth cores 9a to 9d are arranged. Four cores 9a to 9d are arranged counterclockwise. On the other hand, the first to fourth plug-side contacts 16a to 16d are arranged clockwise in any of the plug attached to the left end portion and the plug attached to the right end portion of the dimming control cable. Yes. Therefore, when the cores 9a to 9d are connected to the plug-side contacts at the corresponding positions at both ends of the dimming control cable, the core and plug sides of the dimming control cable are connected at one end and the other end of the dimming control cable. Correspondence with contacts is different. In order to make the structure of the receptacle 17 attached to each lighting fixture the same, it is preferable that the correspondence between the core wire of the dimming control cable and the plug-side contact is the same on one end side or the other end side of the dimming control cable. .

  Therefore, in this embodiment, the position of a part of the core wire is switched between the one end side and the other end side of the dimming control cable 6, and as shown in FIG. When the end faces are viewed from the axial direction, the first to fourth plug-side contacts 16a to 16d connected to the first to fourth cores 9a to 9d are in the same direction (clockwise in the illustrated example). ), The first to fourth cores 9a to 9d of the dimming control cable and the first to fourth plug-side contacts 16a to 16d of each of the pair of plugs 11 and 11 are connected to the plug housing. Connected in the body. Since the main body 12b of the plug housing is formed with a large diameter, the position of the core wire as described above can be easily replaced.

  On the outer periphery of the main body 12 b of the plug housing 12, a pair of annular ridges 18, 18 extending in the circumferential direction of the main body are formed at intervals in the longitudinal direction of the plug housing 12. The alignment mark 19 is formed on the outer periphery of the main body 12b while being positioned between the two portions. The alignment mark 19 is used to determine the orientation (circumferential position) of the plug 11 when the plug 11 is connected to the receptacle 17, and is formed in a convex shape or a concave shape so that it can be easily identified by hand search. However, in the illustrated example, the alignment mark 19 is formed in a convex shape.

  As described above, if the main body 12b of the plug housing 12 is formed to have a diameter larger than that of the distal end portion 12a, the plug housing 12 can be easily gripped. Therefore, as in the case of using a four-fiber dimming control cable. Even when the number of core wires of the dimming control cable is large, the plug 11 can be easily connected and disconnected.

  Further, if a convex or concave alignment mark is formed on the outer periphery of the main body 12b of the plug housing 12 as described above, the position of the alignment mark can be confirmed by groping, so that the plug 11 and the receptacle 17 can be located even in a dark tunnel. The correct relative positional relationship around the axis (circumferential direction) can be easily confirmed. Therefore, it is possible to prevent the plug 11 from being erroneously connected and to facilitate the plug connection work.

  Further, as described above, when a pair of annular ridges are provided on the outer periphery of the main body 12b of the plug housing 12, a force is easily applied to the plug housing 12 by placing a finger on these ridges. Therefore, it is possible to easily remove the plug. Further, if the alignment mark 19 is provided between the annular ridges 18 and 18 as described above, the alignment mark 19 can be searched for using the ridges 18 and 18 as a mark. The position of the mark can be easily confirmed.

  In the illustrated example, a pair of ridges 20, 20 having a smaller diameter than the annular ridges 18, 18 are formed on the outer periphery of the distal end portion 12 a of the plug housing 12. The ridges 20, 20 are formed so as to extend in the circumferential direction of the plug housing in the same manner as the ridges 18, 18, and when the distal end 12 a of the plug housing is inserted into the receptacle 17, Fits tightly to the inner circumference and seals the mating part between the plug and the receptacle.

  A cross-shaped projection 23 is formed on the distal end surface of the distal end portion 12a of the plug housing 12 so as to partition between the holes 22a to 22c of the axial center portions of the plug side contacts 16a to 16d.

Next, the structure of the receptacle 17 attached to the case of a lighting fixture will be described.
The illustrated receptacle 17 is formed of a resin molded product, and includes a large-diameter portion 25a and small-diameter male screw portions 25b and 25c extending in the axial direction from the rear end side and the front end side of the large-diameter portion, respectively. The receptacle housing 25 which has integrally is provided. The receptacle housing 25 has a recess 24 for receiving the front end portion 12a of the plug housing 12, and a male screw portion 25b on the rear end side is a mounting hole 5a of the case 5 of the lighting fixture 1 (see FIG. 6). Through the case 5.

  In the receptacle housing 25, the first to fourth receptacle-side contacts that are brought into contact with the first to fourth plug-side contacts 16a to 16d, respectively, when the distal end portion 12a of the plug housing 12 is inserted into the recess 25a. 21a to 21d (the fourth receptacle side contact 21d is not shown) are accommodated.

  The first to fourth receptacle-side contacts 21a or 21d are male contacts, which are arranged side by side in the circumferential direction in the same manner as the plug-side contacts 16a to 16d, and are arranged at the end of the male screw portion 25b of the housing body 25b. It is held in a state of penetrating the bottom wall portion 25 c of the formed recess 24. The first to fourth receptacle-side contacts 21a to 21d have the contact portions 34 formed on the front ends thereof protruding into the recesses 24 inside the housing body 25a, and the leads formed on the rear end portions thereof. The wire connection part 35 is provided in a state of projecting to the outside, and a lead wire connected to the dimmer is connected to each lead wire connection part 35. The bottom wall 25c of the recess 24 is provided with a vent hole (through hole) 26 for venting air in the recess 24 when the tip of the plug housing 12 is inserted into the recess 24. Further, at the bottom of the recess 24 of the receptacle housing 25, there is provided a cross-shaped groove 27 into which the cross-shaped protrusion 23 at the tip of the plug 11 is fitted when the plug 11 is inserted into the recess 24.

  A packing 30 is fitted into the male screw portion 25b, and the packing 30 is formed between the large-diameter portion 25a of the receptacle housing 25 and the male screw portion 25b, and the mounting hole 5a of the case 5 of the luminaire 1. It is arrange | positioned between the periphery of. An annular packing restricting member 36 is disposed so as to surround the packing 30 between the peripheral portion of the mounting hole of the case and the housing main body 25a. A nut 31 is also screwed into the male screw portion 25b, and the nut 30 is tightened until the peripheral portion of the mounting hole of the case 5 of the lighting fixture comes into contact with the packing restricting member 36, thereby compressing the packing 30 and compressing the receptacle housing 25. Is fixed to the case 1 of the lighting fixture.

  In the present embodiment, when the nut 31 is tightened to the receptacle housing 25 side and the periphery of the mounting hole 5a of the luminaire case comes into contact with the packing regulating member 36, the compression amount of the packing 30 is made appropriate. The axial length of the packing restricting member 36 is set.

  A cylindrical packing 28 is fitted to the inner periphery of the recess 24 of the receptacle housing 25. The cylindrical packing 28 is formed so that its tip protrudes slightly from the tip of the connector housing 25 in a state where it is fitted to the inner periphery of the recess 24. A synthetic resin nut 29 is screwed into the male thread portion 25 c on the distal end side of the receptacle housing 25, and the distal end portion 12 a of the four-core connector main body 12 is placed inside the cylindrical packing 28 on the inner periphery of the recess 24. In the inserted state, the nut 29 is tightened to compress the tip of the cylindrical packing 28 slightly protruding from the tip of the connector housing 25, thereby reducing the diameter of the cylindrical packing 28. As a result, the packing 28 is plugged into the plug housing. A watertight seal is performed by closely contacting the outer periphery of the 12 tip portions 12a. At this time, a pair of ridges 20, 20 provided on the outer periphery of the tip portion 12 a bite into the inner periphery of the cylindrical packing 28, and the reduced diameter of the cylindrical packing 28 and the ring-shaped ridges As a result, the pull-out resistance of the tip end portion 12a of the plug housing 12 is increased and the plug 11 is prevented from being detached from the receptacle 17.

  A convex alignment mark 32 is formed on the outer periphery of the large-diameter portion 25a of the receptacle housing 25. By aligning the position of the alignment mark 19 of the plug 11 with the position of the alignment mark 32 of the receptacle 11, the plug 11 and the receptacle 17 are aligned. The positional relationship between them can be adjusted correctly. Further, a groove 40 extending in the axial direction of the receptacle housing 25 is formed on the outer periphery of the male screw portion 25 b of the receptacle housing 25, and the positioning protrusion 5 b formed on the inner periphery of the mounting hole provided in the case 5 of the lighting fixture 1. By fitting (see FIG. 6) into the groove 40, the receptacle is prevented from rotating.

  When connecting the plug 11 of this embodiment to the receptacle 17, the nut 29 of the receptacle 17 is loosened, and the alignment mark 19 of the plug 11 is aligned with the alignment mark 32 of the receptacle 17 so that the tip of the plug housing 12 12 a is inserted into the recess 24 of the receptacle housing 25. The distal end portion 12a of the plug housing 12 is pushed into the recess 24 while the air in the recess 24 is removed from the vent hole 26. By this pushing operation, the cruciform protrusion 23 of the plug housing 12 enters the cruciform groove 27 of the receptacle 17. Fit. In this state, the distal end of the intermediate portion 12c of the plug housing 12 abuts against the distal end of the cylindrical packing 28 of the receptacle 17 so that no further insertion is possible. In this state, by tightening the nut 29, the tip of the cylindrical packing 28 slightly protruding from the tip of the receptacle housing 25 is compressed to reduce the diameter of the cylindrical packing 28, whereby the packing 28 is connected to the plug housing. 12 is brought into close contact with the outer periphery of the distal end portion 12a, and the protruding ridges 20 on the outer periphery of the distal end portion of the plug housing are bitten into the packing 28 to achieve a watertight seal.

  In the above example, the alignment marks 19 and 32 are provided in a convex shape. However, since the alignment mark can be recognized by touching with a hand, the alignment mark is provided in a concave shape (the concave portion is used as the alignment mark). You can also.

  In the above embodiment, a pair of protruding strips 20 for sealing the fitting portion between the plug and the receptacle is provided, but the number of protruding strips is not limited to one pair, and the plug body If there is at least one ridge on the outer periphery of the tip, the sealing of the fitting portion between the plug and the receptacle can be achieved.

  In the above example, a series of lighting fixtures 1, 1,... Installed in the tunnel are sequentially connected via the dimming control cable 6, but as shown in FIG. A main dimming control cable 6A for transmitting a control signal for dimming is provided in common to the series of lighting fixtures 1, 1,..., And the common main dimming control cable 6A is connected to the lighting fixtures 1, 1,. The branch dimming control cable 6B for each lighting fixture is branched from the main dimming control cable 6A at the installation location of each lighting fixture 1, and the terminal portion of each branch dimming control cable 6B. The plug 11 attached to may be connected to the receptacle 17 attached to the case of the corresponding lighting fixture.

It is a side view of the plug which comprises the connector of this embodiment of this invention. It is a front view of the plug. It is sectional drawing of the cable used by this embodiment. It is the longitudinal cross-sectional view which showed the plug and receptacle of the connector of this embodiment. It is a side view which shows the state which attached the same connector to the case of the lighting fixture. It is sectional drawing which shows the structure of the receptacle used by this embodiment. It is the perspective view which showed the structure of the light control cable with a plug for tunnel lighting fixtures concerning this embodiment. (A) And (B) is the connection diagram which showed the example of a different structure of the illuminating device in a tunnel concerning this invention, respectively. It is the connection diagram which showed the connection between the lighting fixtures of the conventional lighting apparatus in a tunnel. In a conventional tunnel lighting device, a dimming control cable used for connecting adjacent lighting fixtures and a configuration of a connection portion between the dimming control cable and the lighting fixture are schematically shown. It is sectional drawing of the principal part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lighting fixture 5 Case 6 Dimming control cable 9a-9d The 1st thru | or 4th core wire 11 Plug 12 Plug housing 12a Tip part 12b Main body 16a-16d The 1st thru | or 4th plug side contact 17 Receptacle 18 An annular protrusion Part 19 Alignment mark 21a to 21d First to fourth receptacle side contacts 24 Recess 25 Receptacle housing 30 Packing 31 Nut 32 Alignment mark 40 Groove 100 Connector

Claims (7)

A plurality of lighting fixtures installed at predetermined intervals in the tunnel, and dimming connected to each lighting fixture for giving a control signal to a dimmer provided inside each of the plurality of lighting fixtures In a tunnel lighting device with a control cable,
Each of the plurality of lighting fixtures and the dimming control cable are connected via a connector having a plug and a receptacle,
An in-tunnel illumination device, wherein a convex or concave alignment mark used for aligning a position around the axis of the plug when the plug is connected to the receptacle is provided on each of the plug and the receptacle. . A plurality of lighting fixtures installed at predetermined intervals in the tunnel, and dimming connected to each lighting fixture for giving a control signal to a dimmer provided inside each of the plurality of lighting fixtures In a tunnel lighting device with a control cable,
The dimming control cable is a main dimming control cable provided in common for the plurality of lighting fixtures, and a dimming dimming for each lighting fixture branched from the main dimming control cable at the installation location of each lighting fixture. A control cable, and the dimming control cable is connected to a corresponding lighting fixture via a connector consisting of a plug and a receptacle,
An in-tunnel illumination device, wherein a convex or concave alignment mark used for aligning a position around the axis of the plug when the plug is connected to the receptacle is provided on each of the plug and the receptacle. . A receptacle attached to a case of the lighting fixture for giving a control signal to the dimmer in the lighting fixture installed in the tunnel, and a terminal portion of the dimming control cable for transmitting the control signal given to the dimmer A tunnel luminaire connector comprising a plug attached and connected to the receptacle,
The plug has a large-diameter main body and a small-diameter distal end inserted into the receptacle, and the main body is integrated with the insulation coating of the cable, and the plug housing A plug-side contact provided and connected to the core of the cable,
A convex or concave alignment mark used to determine the orientation of the plug when the plug is connected to the receptacle is formed on the outer periphery of the main body of the plug housing;
A connector for tunnel lighting fixtures. On the outer periphery of the main body of the plug housing, a pair of annular ridges extending in the circumferential direction of the main body are provided in a state spaced from each other in the longitudinal direction of the plug housing,
The tunnel illuminator connector according to claim 3, wherein the alignment mark is formed between the pair of ridges. The receptacle has a large-diameter portion and a small-diameter male screw portion extending in an axial direction projecting from the rear end portion side of the large-diameter portion, and has a recess for receiving the tip end portion of the plug housing on the inside. A receptacle housing in which the male screw portion is introduced into the lighting fixture through a mounting hole provided in the case of the lighting fixture; and a distal end portion of the plug housing is accommodated in the concave portion in the receptacle housing. A receptacle-side contact that is brought into contact with the plug-side contact when inserted into the socket, a nut screwed into the male screw portion, and a large-diameter portion and a small-diameter portion of the receptacle housing that are fitted into the male screw portion. A packing disposed between a step portion formed between the male screw portion and a peripheral portion of a mounting hole of the case of the lighting apparatus, the nut and the mounting And an annular packing regulating member provided so as to surround the packing from the outside with the peripheral part of,
When the nut is tightened to the receptacle housing side and the peripheral part of the mounting hole of the case of the lighting fixture comes into contact with the packing restricting member, the packing restricting member is adjusted so that the amount of compression of the packing is appropriate. The axial length of is set,
The connector for tunnel lighting fixtures of Claim 3 or 4 characterized by these.   A convex or concave receptacle-side alignment mark corresponding to the plug alignment mark is provided on the outer periphery of the housing body of the receptacle housing, and provided on the outer periphery of the male screw portion of the receptacle housing in the case of the lighting fixture. 6. The connector for a tunnel lighting device according to claim 5, wherein a groove for fitting a positioning projection formed on the inner periphery of the mounting hole is formed. A dimming control cable having first to fourth cores for transmitting control signals to be supplied to a dimmer of a lighting fixture installed in the tunnel, and 1 attached to one end and the other end of the cable, respectively In a dimming control cable with a plug for a tunnel lighting fixture with a pair of plugs,
Each of the pair of plugs integrally has a large-diameter main body and a small-diameter tip inserted into a receptacle attached to the lighting fixture, and the main body is integrated with the insulation coating of the cable. And a first to fourth plug-side contacts provided in the plug housing and connected to the first to fourth cores of the cable, respectively.
A convex or concave alignment mark used to determine the orientation of the plug when connecting the plug to the receptacle is formed on the outer periphery of the main body of the plug housing,
When the end surfaces of the pair of plugs are viewed from the axial direction, the first to fourth plug-side contacts respectively connected to the first to fourth core wires are arranged in the same direction. The first to fourth core wires and the first to fourth plug-side contacts of each of the pair of plugs are connected in the plug housing;
A dimming control cable with a plug for tunnel lighting fixtures.

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