JP2000003771A - Plug for wiring duct - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plug for wiring duct capable of fixing a lighting fixture without generating plays, while improving the coupling strength with the light fixture. SOLUTION: An arm 78 of a lighting fixture B is coupled with a fixed plate 31 by a fitting screw 80. Both fitting screws 80 are positioned while being displaced from each other. Consequently, the rotation of the lighting fixture B around the attaching screw 80 is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug for a wiring duct, which is mechanically coupled to a wiring duct laid on a ceiling or the like and is electrically connected to the wiring duct.

[0002]

2. Description of the Related Art Conventionally, there has been provided a wiring apparatus in which a conductive line is provided in a wiring duct laid on a ceiling or the like, and power is supplied to a load such as an illumination load through a plug connected to the wiring duct. ing. A wiring duct used in this type of wiring device has a rectangular cross section, and has an opening along the longitudinal direction on the lower surface. That is, the inner flange pieces project from both the opening edges of the downwardly opened U-shaped section, and the opening between the tip edges of the inner flange pieces is open. Also, on the inner surface of the wiring duct, a conductive line is provided on each of the pieces except the inner flange piece. The pair of conductive lines provided on both side pieces are power supply lines (voltage lines and ground lines), and the conductive lines provided on the upper piece are ground lines.

[0003] The plug has an insertion portion inserted into the opening of the wiring duct. The insertion portion is engaged with an inner flange piece to prevent falling, and a conductive line is brought into contact with the conductive line. And a current collector electrically connected to the power supply. This type of wiring device is used to supply power to a lamp such as a spotlight, for example, and can suspend a lamp by connecting the other end of an arm having one end connected to the lamp to a plug. That is, a lighting fixture can be constituted by the plug and the lamp. Therefore, the position of the lamp can be freely adjusted within the range in which the wiring duct is laid, and the illumination position required in an art museum, a museum, a store, or the like can be adjusted.

As a structure of a portion for connecting a lamp to this type of plug, as described in Japanese Patent Application Laid-Open No. 57-172669, a threaded portion is provided on the outer peripheral surface of the upper end of an arm provided on the lamp. Is formed, and a nut fixed to the plug is screwed into a threaded portion of the arm.

[0005]

However, in the structure described above, when an external force acts on the lamp when the lamp is moved along the wiring duct or when the lamp is replaced, the joint between the plug and the arm is loosened. Sticking will occur. Also, since the arm is only fixed to the plug with one nut, if the weight of the lamp is large, the load on the joint between the arm and the nut increases, and the joint between the lamp and the plug becomes large. Rattling or gaps may occur.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to increase the strength of connection with a lamp and to make the lamp rattle even when an external force acts on the lamp or when the lamp is heavy. It is an object of the present invention to provide a wiring duct plug which can be fixed without any problem.

[0007]

According to a first aspect of the present invention, there is provided a body provided with an insertion portion inserted into a wiring duct through an opening formed in one surface of the wiring duct along a longitudinal direction; A current collector movable between a position electrically connected to a conductive line provided in the wiring duct provided in the portion and a position for releasing the electrical connection, and a mechanical device provided with a wiring duct provided in the insertion portion. A connecting plate movable between a position for preventing the body from being detached from the wiring duct and a position for releasing the mechanical connection, and a fixing plate to which the lamp is coupled; The lamp is connected to the fixing plate by the fixture at different positions in the projection plane which are parallel to the longitudinal direction of the wiring duct and are perpendicular to the opening at one position on each of the left and right sides with respect to the direction.

According to a second aspect of the present invention, in the first aspect of the invention, the connecting plate and the fixing plate, and a connecting portion of the lamp to the fixing plate are made of metal.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the lamp includes a rotatable shaft attaching portion capable of changing an irradiation direction.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. In the following, as shown in FIG. 4, an example is shown in which a lighting fixture is configured by attaching a lamp B to a plug A.
The wiring duct 70 for attaching the plug A is configured as follows. The duct body 71 of the wiring duct 70 is
An opening 72 having a rectangular cross section and substantially the entire length is provided on the lower surface. That is, the inner flange pieces 73 extend in parallel with the center piece from the distal ends of the two leg pieces of the downwardly opened U-shaped member, and the opening 72 is formed between the distal edges of the two inner flange pieces 73. Is formed. The tip of one leg protrudes below the inner flange piece 73 to form a reverse-assembly preventing piece 74 described later. In the middle of each leg in the duct main body 71, a supporting projection 75 is provided in parallel with the central piece, and a conductive line 76 having a voltage line on one end and a ground line on the other end is provided on the tip surface of the supporting projection 75. Is exposed. Also, a conductive line is provided on the inner side surface of the central piece, and this conductive line serves as a ground line. A rail groove 77 is formed between the inner flange piece 73 and the support protrusion 75. The wiring duct 70 having the above-described structure is fixed using a fixing tool such as a screw with the center piece abutting the ceiling surface. Hereinafter, the longitudinal direction of the wiring duct 70 is referred to as the front-rear direction, and the width direction is referred to as the left-right direction.

The body 1 of the plug A is, as shown in FIG.
A body 10 in which left and right half bodies 11 and 12 as synthetic resin molded products are connected by assembly screws (not shown), and a synthetic resin molded product cover 20 that is covered on the lower surface side of the body 10.
It is composed of

The body 10 integrally includes a main body 14 having an oblong horizontal cross section, and an insertion portion 15 projecting from the upper surface of the main body 14 and having a smaller left and right width than the main body 14. . The width dimension of the insertion portion 15 is the opening 7 of the wiring duct 70.
2 is set to be insertable.

The cover 20 has a shallow cover portion 20a having an oblong horizontal cross section substantially continuous with the outer periphery of the main body portion 14 of the body 10.
And a deep cover portion 20b having an oblong horizontal cross section protruding downward from a part of the shallow cover portion 20a. The upper surface of the shallow cover portion 20a is open, and the shallow cover portion 20a is open. The cover 20 is coupled to the body 10 such that the upper edge of the body 20a contacts the lower surface of the body 10. In addition, a step (not shown) is formed in a peripheral portion of the lower surface of the body 10,
The body 10 and the cover 20 are positioned by engaging with a step (not shown) formed on the upper surface peripheral portion of the cover 20. An introduction hole (not shown) for inserting an arm 78 provided in the lamp B is formed in a central portion of a lower wall of the deep cover portion 20b. Further, through holes 21 are formed on both side surfaces of the deep cover portion 20b. Double through hole 21
Are orthogonal to each other, and are located shifted from each other.

The plug A has a function of mechanically connecting to the wiring duct 70 and a function of electrically connecting to it. That is, the body 10 includes the mechanical coupling device 30 and the electrical connection device 4.
0 is held.

The mechanical coupling device 30, as shown in FIG.
A fixed plate 31 is formed by bending a sheet metal into a U-shape that is opened downward, and a rotating shaft 32 is supported by a central piece of the fixed plate 31 using a shaft screw (not shown). A metal connecting plate 33 for mechanically connecting to the wiring duct 70 is fixed to an upper end of the rotating shaft 32, and a cam 35 having a connecting operation lever 34 continuously and integrally fixed to a lower end of the rotating shaft 32. Is done. The connecting plate 33 is formed in a parallelogram shape in which one inner angle is set to approximately 45 degrees, and is fixed so that the central portion does not rotate with respect to the rotating shaft 32.

The interior of the body 10 is divided into half bodies 11, 12 respectively.
Are roughly divided into three upper and lower stages by partition walls 17a and 17b provided on the inner side surface. The upper row corresponds to the insertion portion 15, and storage holes 36 and 46 penetrating left and right are formed at two front and rear portions of the insertion portion 15. The connecting plate 33 is arranged at a position corresponding to the one storage hole 36, and the cam 35 is arranged at the lower stage. The two legs of the fixing plate 31 project downward through the lower wall of the body 10, and fixed projections that engage with fixing holes 31 a formed in the two legs of the fixing plate 31 are provided on the inner side surface of a portion of the body 10 corresponding to the two legs. (Not shown) is formed. That is, the position of the fixing plate 31 is fixed to the body 10 by the engagement between the fixing protrusion and the fixing hole 31a. An attachment hole 31b through which an attachment screw 80 (see FIG. 4) as an attachment is inserted is formed in both leg pieces of the fixed plate 31. The mounting screw 80 is screwed into a metal bearing base 81 through a through hole 21 provided in the cover 20 and a mounting hole 31 b provided in both leg pieces of the fixing plate 31. The bearing stand 81 is the cover 20
Is connected to the upper end of the arm 78 introduced into the
The arm 78 is connected so that the arm 8 can rotate around a vertical center line. Here, the arm 78 and the bearing stand 81
The connection with the nut is not a nut but a fixing member such as a C-ring fixed to the peripheral surface of the arm 78, so that looseness does not cause rattling or the like. As described above, the mounting screw 80 has a function of fixing the cover 20 and the arm 78 to the fixing plate 31. The straight lines perpendicular to the opening surfaces of both mounting holes 31b are shifted from each other so that the arm 78 does not rotate with respect to the fixed plate 31. In other words, the two mounting screws 80, the two through holes 21, and the two mounting holes 31b are respectively located at different positions in the projection plane on the projection plane orthogonal to the longitudinal direction of the mounting screws 80.

A connecting operation lever 34 is inserted through the side wall of the body 10 at a position corresponding to the lower stage separated by the partition walls 17a and 17b, and the connecting operation lever 34 is moved within a range of approximately 45 degrees around the rotation shaft 32. A lever insertion hole 18 formed so as to be movable is formed. Thus, the connecting operation lever 34 can reciprocate between a position substantially coinciding in the front-rear direction and a position rotated clockwise by approximately 45 degrees when viewed from above.

On the other hand, the electric connection device 40 has a rotating shaft 42, and the upper end of the pair of current collectors 43 for electrically connecting to the wiring duct 70 is exposed at the upper end of the rotating shaft 42.
Further, a cam 45 having a connection operation lever 44 as an electric connection operation unit continuously and integrally fixed to a lower end portion of the rotating shaft 42. The upper end of the current collector 43 is bent in an inverted L-shape, and the lower end of the current collector 43 is exposed at an intermediate portion of the rotating shaft 42 in the vertical direction. On the rotating shaft 42, a connecting piece 42a is provided continuously and integrally below the current collector 43 in the same direction as the tip of the current collector 43. On the rotating shaft 42, both current collectors 43 are provided above the connecting piece 42a. An insulating wall 42b for insulation is protruded. In a state where the mechanical coupling device 30 and the electrical connection device 40 are attached to the body 10, the connection piece 42 a
3 is provided at the same height position. An earth pin 41 that is movable in the up-down direction with respect to the rotation shaft 42 and that is prevented from falling upward is inserted into the rotation shaft 42.

The current collector 43 and the connecting piece 42a are connected to the body 1
The cam 45 is arranged at a position corresponding to the storage hole 46 formed in the 0 insertion portion 15 and the cam 45 is arranged at the lower stage. The lower end of the current collector 43 exposed at the middle of the rotating shaft 42 is located at the middle. The upper end of the earth pin 41 is inserted into the upper wall of the body 10, and the lower end of the earth pin 41 is inserted into the lower wall of the body 10 that supports the lower end of the rotating shaft 42.
Abuts on the upper surface of a grounding plate 51 made of a sheet metal having elasticity and conductivity disposed in the lower wall of the grounding plate. Here, when the ground pin 41 moves downward, the ground plate 51 bends, and an upward return force acts on the ground pin 41. The other end of the ground plate 51 is located lower than the one end, and is exposed to the lower surface of the body 10 so that the terminal 51 a
become. A terminal screw (not shown) is screwed into the terminal portion 51a, and an external electric wire introduced from the lamp B through the inside of the arm 78 is connected using the terminal screw.

Each of the half bodies 11, 12 holds an electrode plate made of a sheet metal having elasticity and conductivity.
A brush portion (not shown) bent in a U-shape in the thickness direction is formed at an upper end portion of each electrode plate, and a tip end portion of the brush portion is exposed at an intermediate portion of the rotary shaft 42 in a vertical direction. Electronic 4
3 can be elastically contacted. The lower end of the electrode plate extends along the inner side surface of each half body 11, 12 and is exposed from the lower surface of the body 10 to form terminal portions 52b, 53b. Terminal screws (not shown) are screwed into the terminal portions 52b and 53b, and an external electric wire introduced from the lamp B through the inside of the arm 78 is connected using the terminal screws.

A connection operation lever 44 is inserted into the side wall of the body 10 at a position corresponding to the lower stage separated by the partition walls 17a and 17b, and the connection operation lever 44 is moved within a range of approximately 90 degrees around the rotation shaft 42. A lever insertion hole 19 formed so as to be movable is formed. Thus, the connection operation lever 44 can reciprocate between a position substantially coincident in the front-rear direction and a position rotated approximately 90 degrees counterclockwise when viewed from above.

The two cams 35 and 45 are connected to the body 1 as described above.
0, and a slide lever 60 is disposed between the cams 35 and 45. Slide lever 60
Has a configuration in which a pair of pressing members 61 and 62 are connected to be extendable and contractable, and a pressing spring (not shown) is interposed between the two pressing members 61 and 62. The pressing spring is a compression spring and urges the pressing members 61 and 62 in a direction to separate them. Each pressing element 61,
The distal end of 62 contacts the cam surfaces of the cams 35 and 45.

Both cams 35, 45 and slide lever 6
0 functions to regulate the operation order of the coupling operation lever 34 and the connection operation lever 44. That is, both cams 3
Two concave portions having different distances from the rotation center are formed on the cam surfaces 5 and 45, respectively, so that the distance between the two cam surfaces changes due to the rotation of the cams 35 and 45, and the two pressing members 61 and 6 are formed.
The rotation of the cams 35 and 45 is restricted by the change in the distance between the two. Although detailed explanation is omitted,
When the connection plate 33 or the current collector 43 is projected from the insertion portion 15, the connection operation lever 4 is operated after the connection operation lever 34 is operated.
4 is permitted, and the connecting plate 33
When the current collectors 43 are stored in the storage holes 36 and 46 from the protruding state, the operation of the connection operation lever 34 is permitted after the operation of the connection operation lever 44.

By defining the operation order in this way, when the connection piece 3 is connected to the wiring duct 70,
After the mechanical coupling by 3, the electrical connection by the current collector 33 is made, and it is possible to make the electrical connection after confirming that it is securely attached so as not to drop. Conversely, when detaching from the wiring duct 70, the mechanical connection can be released in a state where the wiring is electrically disconnected, and there is almost no risk of electric shock, and the safety at the time of work is increased.

On one side of the wiring duct 70, a reverse-assembly preventing piece 74 protrudes downward, and the direction in which the body 1 is attached to the wiring duct 70 is defined by the reverse-assembly preventing piece 74. That is, the reverse assembly preventing groove 84 is formed on one side edge of the upper surface of the main body portion 14 of the body 10 so as to mesh with the reverse assembly preventing piece 74. Therefore, if the wiring duct 70 and the body 10 are reversed left and right, the body 10 tilts with respect to the wiring duct 70, and the coupling operation lever 30
Is operated, the connecting plate 33 hits the inner flange piece 73 and is not introduced into the rail groove 77, so that the body 10 cannot be fixed to the wiring duct 70. Thus, the direction of the body 10 with respect to the wiring duct 70 is defined.

In the lamp B used in the present embodiment, the arm 78 is rotatably connected to the plug A around the vertical axis within 360 degrees (that is, the bearing base 81 functions as a shaft attachment portion). Further, a shaft portion 82 as a shaft attachment portion provided on the lamp B so as to be orthogonal to the arm 78 is rotatable about an axis orthogonal to the vertical direction. That is, the irradiation direction of the lamp B can be changed by these shaft attachment portions. Thus, when the plug A runs along the wiring duct 70 or rotates around the shaft portion 82, a force acts to form a gap between the front and rear portions of the cover 20 and the body 10. In the configuration of the present embodiment, since the two mounting screws 80 are not arranged in a straight line with respect to the fixing plate 31, the above-described force is less likely to act, and the lamp B is rattled against the plug A. In addition, the formation of a gap between the body 10 and the cover 20 in the plug A is suppressed. Moreover, the connecting plate 33 and the lamp B mechanically coupled to the wiring duct 70
Since the fixing plate 31 and the bearing base 81 for connecting the two are made of metal, the strength of the mechanically connected portion is increased, and the load resistance can be increased. Thus, the lamp B having a large load can be supported without play.

[0027]

According to the first aspect of the present invention, there is provided a body provided with an insertion portion inserted into a wiring duct through an opening formed in one surface of the wiring duct along the longitudinal direction, and provided on the insertion portion. A current collector movable between a position electrically connected to the conductive line provided in the wiring duct and a position for releasing the electrical connection, and mechanically coupled to the wiring duct provided in the insertion portion A connecting plate movable between a position for retaining the body with respect to the wiring duct and a position for releasing the mechanical coupling, and a fixing plate to which the lamp is coupled; The lamps are connected to the fixing plate by the fixtures at different positions in the projection plane which are parallel to the longitudinal direction of the wiring duct and perpendicular to the opening at each one position, and the axes of the fixtures are shifted from each other. The lamp will rotate around the fixture. Without having to, resulting in increased binding strength between the lamp and the fixed plate, it is possible to hold the lamp so as not to cause looseness. As a result, even when an external force acts on the lamp or the weight of the lamp is large, the lamps can be combined so as to prevent rattling.

According to a second aspect of the present invention, in the first aspect of the present invention, the connecting plate and the fixing plate and the connecting portion of the lamp to the fixing plate are made of metal, and the connecting strength to the wiring duct is reduced. As the size increases, the bonding strength with the lamp also increases, so that a relatively heavy lamp can be mounted.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the lamp has a rotatable shaft mounting portion capable of changing the irradiation direction, and changes the irradiation direction of the lamp. Claim 1 when the shaft attaching portion rotates due to
According to the configuration of the second aspect, it is difficult for the external force from the lamp to be transmitted to the plug, and it is possible to prevent the lamp from rattling and the plug body from being deformed.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view of the same with a cover removed.

FIG. 3 is a perspective view showing a mechanical coupling device used in the same.

FIG. 4 is a perspective view showing a use state of the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 15 Insert part 31 Fixing plate 33 Connecting plate 43 Current collector 70 Wiring duct 72 Opening 76 Conductive line 80 Mounting screw 81 Bearing stand 82 Shaft A Plug B Lighting fixture

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Ken Imai 1-55 Yoshida Shimojima, Higashi-Osaka City, Osaka Asahi National Lighting Co., Ltd. (72) Inventor Satoshi Yajima 1-55 Yoshida Shimojima, Higashi-Osaka City, Osaka Prefecture Asahi National Lighting Co., Ltd. F-term (reference) 5G357 CB01 CC03 CC10 CD10 DC02 DD06 DF03

Claims (3)

[Claims] 1. A body provided with an insertion portion inserted into a wiring duct through an opening formed along a longitudinal direction on one surface of a wiring duct, and a conductive member provided in the insertion portion and provided in the wiring duct. A current collector movable between a position electrically connected to the line and a position at which the electrical connection is released, and mechanically coupled to the wiring duct provided in the insertion portion and moving the body to the wiring duct A connecting plate movable between a position at which the lamp is prevented from coming off and a position at which the mechanical coupling is released, and a fixing plate to which the lamp is coupled.
A plug for a wiring duct, wherein a lamp is coupled to a fixing plate by a fixture at different positions in a projection plane parallel to the longitudinal direction of the wiring duct and orthogonal to the opening. 2. The wiring duct plug according to claim 1, wherein the connecting plate and the fixing plate, and a connecting portion of the lamp with the fixing plate are made of metal. 3. The plug for a wiring duct according to claim 1, wherein the lamp includes a rotatable shaft attachment portion capable of changing an irradiation direction.