JP4364720B2 - Plug for lighting duct - Google Patents

Description

  The present invention relates to a plug mounted on a lighting rail laid on a ceiling, a wall surface or the like for power supply of illumination.

  Conventionally, a lighting duct has been used as a lighting fixture that can be freely set. FIG. 4 shows an example of an illumination system using a lighting duct. The lighting duct 51 is attached to a ceiling surface or the like, and can be laid in an arbitrary shape by inserting a feed-in cap 52 for feeding at the end and connecting with a joiner 53. Inside the lighting duct 51, a pair of linear conductors for power feeding are laid along the longitudinal direction. Various lighting fixtures 54 and 55 are attached to the lighting duct 51 via plugs 56 and 57, respectively.

The dimensions of the lighting duct 51 and the plugs 56 and 57 attached thereto are defined in JIS C 8366 (Non-Patent Document 1). 5 and 6 show the main dimensions of the fixed two-pole 125V, 15A lighting duct and plug, respectively. When the plug 56 is attached to the lighting duct 51, the electrode 62 extending upward from the upper end of the plug body 61 and projecting left and right contacts the linear conductor 63 of the lighting duct 51, and the plug 56 extends in the same direction as the electrode 62. The engaging piece 64 and the end surface of the plug main body 61 are engaged with the receiving plate 66 on the lower surface side of the duct main body 65, and the plug 56 is attached to the lighting duct 51.
JIS C 8366 (Revised on January 1, 1995) Page 5, Figure 1, Figure 2

  As described above, although the main dimensions of the lighting duct and the plug attached to the lighting duct are stipulated once in JIS, there are actually dimensional variations among manufacturers. In particular, if the thickness of the backing plate varies, the attached plug may rattle. In particular, when the main body portion 54a of the lighting fixture 54 is heavy and the center of gravity is greatly deviated from the cylindrical central axis of the plug 56, the plug 10 is fitted to the lighting duct 30 at an angle. This leads to poor contact with the electrodes, and causes problems such as sparks and melting of the contact parts.

  The present invention has been made in view of the above points, and provides a lighting duct plug that prevents rattling between the lighting duct and enables reliable contact with a linear conductor for power supply. The purpose is to provide.

  The lighting duct plug according to the present invention is formed with a receiving plate for attaching a plug having one side as a fixed surface and the other side having an opening along the longitudinal direction on which the plug is mounted. A lighting duct plug to be attached to a lighting duct in which a pair of linear conductors for supplying a voltage are laid in parallel, and is provided with a cylindrical plug body and one end side of the plug body, and the lighting Inserting into the inside from the opening of the duct and rotating approximately 90 ° about the central axis of the plug body, the mechanical coupling through the backing plate and the electrical connection with the linear conductor A duct insertion portion to be screwed to the outer peripheral surface of the plug body and rotated about the rotation axis to move along the central axis to the lighting duct. Characterized by comprising a fixed ring in contact.

  The duct insertion portion is, for example, a pair of electrodes that protrude from one end of the plug body and extend in opposite directions within a plane orthogonal to the central axis of the plug body, and a position closer to the plug body than the electrodes. And a pair of engagement pieces extending in parallel with the pair of electrodes, and the direction in which the pair of electrodes and the pair of engagement pieces extend substantially coincides with the direction in which the opening of the lighting duct extends. Inserted into the opening from the opening of the lighting duct and rotated approximately 90 ° around the central axis, the tip ends of the pair of electrodes come into contact with the pair of linear conductors, respectively, and the pair of engaging pieces It engages with the linear conductor side of the backing plate.

  According to the present invention, the fixing ring screwed to the outer peripheral surface of the plug main body moves along the central axis by being rotated about the rotation axis of the plug main body. The plug and the lighting duct can be securely fixed by tightening the fixing ring toward the lighting duct while being attached to the duct. As a result, rattling between the lighting duct and the linear conductor for feeding can be ensured.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  First, before describing the embodiment of the present invention, the configuration of a lighting duct will be described. FIG. 3 shows a cross-sectional view of the lighting duct 30. The lighting duct 30 includes a duct body 31 having a substantially U-shaped cross section and extending in a rail shape, and a pair of conductors made of an insulator mounted on the inner surfaces of both side walls 31a in the longitudinal direction inside the duct body 31. A support member 32 and a power supply linear conductor 33 supported by the conductor support member 32 and laid along the longitudinal direction are provided. The duct body 31 is made of a metal such as aluminum or a resin, for example. When the duct body 31 is made of resin, the conductor support member 32 can be omitted and the linear conductor 33 can be directly supported. The upper surface of the upper plate 31b of the duct body 31 forms a fixed surface that is fixed to the ceiling 40, and a receiving plate 31c that protrudes inward is formed at the lower end of both side walls 31a. And between the front-end | tips of the receiving plate 31c forms the opening part 34 along a longitudinal direction. In this example, a protrusion 35 for distinguishing the non-grounding side from the grounding side is formed at the tip of one side wall of the duct body 31.

  Next, the plug according to the present embodiment will be described.

  1A is a side view of a plug for a lighting duct according to an embodiment of the present invention, FIG. 1B is a plan view of the plug, and FIG. 2 is a cross-sectional view taken along line AA ′ of FIG. It is.

  The plug 10 is provided with a cylindrical plug main body 11 and one end of the plug main body 11 so as to be inserted into the opening 34 of the lighting duct 30 and rotated approximately 90 ° about the central axis. The duct insertion portion 12 for mechanically connecting and electrically connecting the plug 10 and the outer peripheral surface of the plug main body 11 are screwed together and moved along the central axis by rotating around the rotational axis. And a fixing ring 13 to be configured.

  The duct insertion portion 12 includes a pair of electrodes 14 extending in opposite directions within a plane orthogonal to the central axis of the plug body 11 and a pair of engagements extending in parallel with the pair of electrodes at positions closer to the plug body 11 than the electrodes 14. It has a piece 15. As shown in FIG. 2, each base end side of the electrode 14 is accommodated in the plug body 11 to form a wire connection terminal portion 16 to which a wire of a lighting fixture (not shown) is connected. An electric wire (not shown) is inserted into the plug body 11 through a hole 17 formed at the lower end of the plug body 11.

  A lock piece 18 that is movable along the axial direction of the outer peripheral surface of the plug main body 11 is mounted on the side surface of the plug main body 11 at a position rotated by 90 ° with respect to the direction in which the electrode 14 and the engagement piece 15 extend. The lock piece 18 is urged so that the end of the plug body 11 on the duct insertion portion 12 side always protrudes by a spring (not shown), and a handle 19 is formed on the opposite end. On the surface of the plug main body 11 on which the duct insertion portion 12 is formed, a step portion 20 into which the projection 35 of the duct 30 is fitted when the plug 10 is attached to the lighting duct 30 is formed.

  Next, an operation for attaching the plug 10 thus configured to the duct will be described.

  FIG. 3 is a view showing an operation of attaching the plug 10 to the lighting duct 30.

  First, as shown in FIG. 2A, the direction in which the pair of electrodes 14 and the pair of engagement pieces 15 extend and the longitudinal direction in which the opening 34 of the lighting duct 30 extends (the direction orthogonal to the paper surface in the figure) are substantially the same. The duct insertion part 12 of the plug 10 is inserted through the opening 34 of the lighting duct 30 so as to match. At this time, the directionality of the plug 10 is defined by the projection 35 on the duct 30 side and the step 20 on the plug 10 side. The tip of the lock piece 18 abuts on the lower surface of the receiving plate 31c on the duct 30 side and is pulled downward.

  Next, as shown in FIG. 5B, in the state where the duct insertion portion 12 is inserted into the lighting duct 30, the plug 10 is approximately 90 around the central axis as indicated by an arrow in the figure. By rotating it, the tip ends of the pair of electrodes 14 come into contact with the pair of linear conductors 33 and the pair of engaging pieces 15 are linear conductors 33 of the receiving plate 31c, as shown in FIG. Engage with the side. At the same time, the lock piece 18 is fitted into the opening 34 to regulate the position in the rotational direction. This state is a temporarily fixed state.

  Further, by rotating the fixing ring 13 in the direction indicated by the arrow in the figure, the fixing ring 13 moves upward, contacts the lower end portion of the duct body 31, in this example, the protrusion 35, and further tightens the fixing ring 13. As a result, the engagement piece 15 and the receiving plate 31c come into close contact with each other, and the duct 30 and the plug 10 are firmly fixed.

  As described above, according to the plug 10 of the present embodiment, the fixing ring 13 is tightened to be firmly fixed to the lighting duct 30, and problems such as poor contact due to rattling do not occur.

The side view of the plug for lighting ducts which concerns on one Embodiment of this invention, (b) is the top view of the plug. It is AA 'sectional drawing of FIG.1 (b). It is a side view shown in the partial cross section which shows the attachment procedure to the lighting duct of the plug. It is a perspective view which shows an example of the illumination system using a lighting duct. It is sectional drawing which shows an example of a lighting duct. It is sectional drawing which shows a part of conventional plug.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Plug, 11 ... Plug main body, 12 ... Duct insertion part, 13 ... Fixing ring, 14 ... Electrode, 15 ... Engagement piece, 18 ... Lock piece, 30 ... Lighting duct, 31 ... Duct main body, 31c ... Base plate, 32 ... conductor support member, 33 ... linear conductor, 34 ... opening.

Claims (2)

A plug mounting receiving plate having an opening along the longitudinal direction on which one side is fixed and a plug is mounted on the other is formed, and a pair of linear conductors for supplying a power supply voltage along the longitudinal direction is formed inside It is a plug for a lighting duct attached to a lighting duct laid in parallel,
A tubular plug body,
Projected on one end side of the plug body, inserted into the opening from the opening of the lighting duct, and rotated about 90 ° around the central axis of the plug body, thereby mechanically interposing the receiving plate. A duct insertion part for performing coupling and electrical connection with the linear conductor;
A lighting duct comprising: a fixing ring that is screwed onto an outer peripheral surface of the plug body and is rotated about the rotation axis so as to move along the center axis and abut against the lighting duct. Plug. The duct insertion part is
A pair of electrodes protruding from one end of the plug body and extending in opposite directions within a plane perpendicular to the central axis of the plug body;
A pair of engagement pieces extending in parallel with the pair of electrodes at a position closer to the plug body than the electrodes;
The direction in which the pair of electrodes and the pair of engaging pieces extend and the direction in which the opening of the lighting duct extends are substantially aligned with each other, and is inserted into the inside of the opening of the lighting duct, and is approximately 90 around the central axis. When rotated, the tip ends of the pair of electrodes are in contact with the pair of linear conductors, respectively, and the pair of engaging pieces are engaged with the linear conductor side of the backing plate. The lighting duct plug according to claim 1.

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