JP2005346960A - Electric wire cord and suspension type lighting device using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To largely alleviate a load on a conductor and further improve workability. <P>SOLUTION: A pair of conductors 13, 13 are branched to right and left and led out of an insulating outer cover 16 together with reinforcing cores 14. At a branched part, a cylindrical terminal fixing part 21 for fixing lead-out positions of the conductors 13 and the reinforcing cores 14 is formed by insertion molding. The reinforcing cores 14 led out of the terminal fixing part 21 are tightly fastened with each other. By this, almost all loads in a direction pulling the end of an electric wire cord 10 are received by the reinforcing cores 14. The terminal fixing part 21 has a groove 22 formed coaxial with the electric wire cord 10, a locking piece is mounted to the groove 22 to receive the loads. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electric wire cord used for a hanging type illumination device, and more particularly to an electric wire cord realizing a tension stop structure using a reinforcing core and a hanging type illumination device using the same.

  As an electric wire cord used for a hanging type illumination device, the one shown in FIG. 6 is conventionally known. The electric wire cord 50 is formed by covering a plurality of conductive wires 53 formed by covering the periphery of a conductor core wire 51 with an insulator 52 together with a reinforcing core 54 and an insulating sheath 55 made of cloth or resin. When performing terminal processing for tension stop on the terminal portion of the electric wire cord 50 extending from a hanging hook rosette (not shown), the lead wire 53 and the terminal portion with the terminal portion penetrating the electric wire insertion hole of the socket mounting bracket 61 of the lighting device. The reinforcing core 54 is led out, and an annular fiber 62 with a part cut away is fitted into the leading portion, and the reinforcing core 54 is folded back and bound to the fiber 62 side. The socket mounting bracket 61 is supported by the enlarged diameter portion formed in this way, so that no direct load is applied to the conductive wire 53 connected to the socket.

However, such a tension stopping method has a problem that workability is poor and terminal processing takes time. Therefore, by using a cord terminal holding tool formed with holding parts on the top, bottom, left and right, the wire cord is held at the upper part, the conductive wire is held at the right and left holding parts, and the reinforcing core is held at the lower part, and the cord is applied. A hanging type lighting device (Patent Document 1) in which the weight of the fixture is dispersed with the reinforcing core to hold the fixture, and the crimp terminal is caulked to the reinforcing core, and the crimp terminal is screwed to the main body of the lighting fixture. A hanging illumination device (Patent Document 2) and the like have been proposed.
Japanese Utility Model Publication No.57-139225 FIGS. 7 and 8 Japanese Utility Model Publication No.56-153069 FIGS. 1 and 2

  However, in the lighting device disclosed in Patent Document 1, the terminal processing unit is increased in size to use a special terminal holder, and the load applied to the conductor cannot be significantly reduced. Further, the lighting device disclosed in Patent Document 2 requires crimping of crimp terminals and screwing to the main body, and the workability cannot be significantly improved.

  This invention is made in view of such a point, and provides the electric wire cord which can aim at the significant load reduction to a conducting wire, and the further improvement of workability | operativity, and a suspension type illuminating device using the same. For the purpose.

  The first electric wire cord according to the present invention is an electric wire cord in which a plurality of conductive wires each coated with an insulator are covered with a resin insulation sheath together with a reinforcing core. Each of the reinforcing cores that are branched with the reinforcing cores and are led out, and terminal fixing portions that fix the lead-out positions of the conductive wires and the reinforcing cores by insert molding are formed at the branching portions, and the reinforcing cores that are led out from the terminal fixing portions are formed. Is characterized by being fastened.

  In the second electric wire cord according to the present invention, in the electric wire cord in which a plurality of conductive wires each covered with an insulator are covered with a resin insulation sheath together with a reinforcing core, the plurality of conductive wires from the insulation sheath at a terminal portion. The reinforced cores are branched and lead out, and the reinforced cores are fastened to each other, and insert parts are formed at branch portions of the plurality of conductive wires so as to include fastening portions of the reinforcing cores inside. The terminal fixing | fixed part which fixes the lead position of conducting wire is formed, It is characterized by the above-mentioned.

  The terminal fixing portion preferably has a groove coaxial with the electric wire cord or an upper end surface orthogonal to the electric wire cord.

  The pendant lighting device according to the present invention uses such a wire cord, and is attached to a socket to which a plurality of conductors of the wire cord are connected and a groove or an upper end surface formed in the terminal fixing portion. An electric wire insertion hole is formed in the locking plate and the central portion, and the locking plate abuts on the lower peripheral edge of the electric wire insertion hole and is supported by the locking plate. And a support member for supporting the above.

  According to the present invention, at the terminal portion, a plurality of conducting wires are branched out from the insulating sheath together with the reinforcing core, and the terminal fixing portion for fixing the lead-out position of the conducting wire and the reinforcing core is formed at the branching portion by insert molding. The reinforcing cores that are led out from the terminal fixing portion are fastened to each other, or the leaded reinforcing cores are fastened to each other by insert molding to branch portions of a plurality of wires so that the fastening portions are included inside A terminal fixing portion for fixing the lead position of the conducting wire is formed. With such a configuration, when a load is applied to the terminal fixing portion in the direction in which the electric wire cord extends, the load is applied to the reinforcing core and is not applied to the internal conductor.

  In addition, according to the present invention, since the terminal fixing part is formed by insert molding, it is possible to reduce the size, and by forming the terminal fixing part in advance, the terminal processing work is greatly simplified. Is done.

  That is, according to the pendant lighting device according to the present invention, the terminal fixing portion subjected to the terminal treatment as described above is inserted into the wire insertion hole of the support member, and the groove or upper end surface formed in the terminal fixing portion. If the locking plate is attached to the support member, the support member is held by the locking plate at the lower peripheral edge position of the power supply insertion hole. The load that supports the support member is applied to the reinforcing core via the terminal fixing portion, and is not directly applied to the electric wire. Thus, according to the present invention, the terminal processing work is extremely easy, and the internal conductors can be reliably protected.

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

  FIG. 1 is a front view showing a terminal portion of an electric wire cord according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the electric wire cord.

  As shown in FIG. 2, the electric wire cord 10 includes a pair of conductors 13 and 13 formed by covering a conductor core wire 11 made of an electrical annealed copper wire or the like with an insulator 12 made of a vinyl chloride mixture (heat resistant PVC or the like). For example, together with a reinforcing core 14 made of Kepler yarn, cotton or the like and an intervening core 18 made of ester yarn, it is wound with an insulating tape 15, and the outer periphery thereof is covered with an insulating skin 16 of a vinyl chloride mixture (heat resistant PVC or the like). It will be.

  As shown in FIG. 1, the electric wire cord 10 of the present embodiment has a pair of conductive wires 13, 13 branched from the insulating sheath 16 to the left and right together with the reinforcing core 14 at the terminal portion, and further inserted into the branch portion. A cylindrical terminal fixing portion 21 that fixes the lead position of the conducting wire 13 and the reinforcing core 14 is formed by molding. The terminal fixing portion 21 is formed of PP (polypropylene) or the like that has good bonding properties with the insulating outer skin 16. In the illustrated example, the tip of the terminal fixing portion 21 has a shape that is cut obliquely, but the shape is arbitrary. The reinforcing cores 14 led out from the terminal fixing portion 21 are fastened to each other, and the knot is located at the lower end position. Thereby, most of the load in the direction of pulling the end of the electric wire cord 10 is received by the reinforcing core 14. A groove 22 coaxial with the wire cord 10 is formed in the terminal fixing portion 21.

  FIG. 3 is a front view showing a terminal portion of an electric wire cord according to another embodiment of the present invention.

  In the previous embodiment, the reinforcing core 14 is extended outside the terminal fixing portion 21 and the reinforcing core 14 is connected outside the terminal fixing portion 21. However, in the electric wire cord 20 of this embodiment, the reinforcing core 14 is connected to the terminal fixing portion 23. First, only the reinforcing core 14 of the lead wire 13 and the reinforcing core 14 that are led out from the insulating sheath 16 is fastened, and the knot is sealed inside the terminal fixing portion 23. . According to this embodiment, the aesthetics are improved by the amount that the knot of the reinforcing core 14 is hidden inside the terminal fixing portion 23. However, in terms of strength, the configuration shown in FIG. 1 can withstand a large load.

  Next, a hanging type illumination device using the electric wire cord 20 will be described.

  4 is a perspective view showing the main part of the illumination device, and FIG. 5 is a cross-sectional view.

  The electric wire cord 20 mentioned above is used for this illuminating device. A pair of conducting wires 13 and 13 led out from the terminal portion of the electric wire cord 20 are inserted into and electrically connected to the insertion port 32 at the upper end of the cylindrical socket 31. A lamp 33 is attached to the socket 31. The groove 22 formed in the terminal fixing portion 23 of the electric wire cord 20 is fitted with a locking plate 35 in which a slit 34 is formed. Further, a trapezoidal cylindrical support member 36 is attached to the electric wire cord 20 through the electric wire through hole 37, and a lower peripheral edge portion of the electric wire through hole 37 is supported by the locking plate 35. The support member 36 is provided with a pair of downwardly extending engagement pieces 39 with claws 38 projecting on the inside, and these engagement pieces 39 engage with the recesses 40 formed in the socket 31 to support the support member 36. Supports the socket 31 via the engagement piece 39. The support member 36 also supports the illumination cover 42 at the upper peripheral edge 41 thereof.

  According to such a configuration, the load of the socket 31 and the lamp 33 is applied to the support member 36 via the engagement piece 39, and the load of the support member 36 is applied to the terminal fixing portion 23 via the locking plate 35. . And since the terminal fixing | fixed part 23 is supported by the reinforcing core 14, a load is not added to the conducting wire 13. FIG.

  In this example, the locking plate 35 is mounted in the groove 22 of the terminal fixing portion 23. However, the locking plate 35 may be received by the upper end portion of the terminal fixing portion 23 without the groove 22. . In addition, as described above, when the locking plate 35 is used, the terminal portion of the electric wire cord 20 can be made compact and the work load when inserting into the electric wire insertion hole 37 of the support member 36 can be reduced. The fixing unit itself may directly support the support member.

  Next, a procedure for assembling the lighting device configured as described above will be described.

  First, the end portion of the electric wire cord 20 is inserted into the electric wire insertion hole 37 at the center of the support member 36 from above, and is drawn downward to insert the conductor core wire 11 at the tip of the conducting wire 13 into the insertion port 32 of the socket 31. Subsequently, the locking plate 35 is attached to the groove 22 formed in the terminal fixing portion 23. Finally, the support member 36 is moved downward, and the pair of engaging pieces 39 are engaged with the recesses 40 formed in the socket 31, whereby the terminal processing of the electric wire cord 20 is completed.

  As described above, according to the hanging type illumination device of the present embodiment, the terminal treatment of the electric wire cord for holding the tension is extremely simple, and the load applied to the conductor can be surely reduced.

It is a front view which shows the terminal part of the electric wire cord which concerns on one Embodiment of this invention. It is sectional drawing of the electric wire cord. It is a front view which shows the terminal part of the electric wire cord which concerns on other embodiment of this invention. It is a perspective view which shows the principal part of the hanging type illuminating device which concerns on one Embodiment of this invention using the electric wire cord. It is sectional drawing of the illumination device. It is a perspective view which shows the terminal part of the conventional electric wire cord.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10, 20, 50 ... Electric wire cord, 11, 51 ... Conductor core wire, 12, 52 ... Insulator, 13, 53 ... Conductor, 14, 54 ... Reinforcement core, 15 ... Insulation tape, 16, 55 ... Insulation sheath, 18 ... Intervening yarns, 21, 23 ... end fixing portions, 22 ... grooves, 31 ... sockets, 35 ... locking plates, 36 ... support members, 39 ... engagement pieces.

Claims (4)

In the electric wire cord in which a plurality of conductive wires each covered with an insulator are covered with a resin core with a reinforcing core,
A plurality of conducting wires are branched from the insulating sheath together with the reinforcing core at the terminal portion, and a terminal fixing portion is formed to fix the lead position of the conducting wire and the reinforcing core by insert molding at the branch portion,
The electric wire cord, wherein the reinforcing cores led out from the terminal fixing portion are fastened together. In the electric wire cord in which a plurality of conductive wires each covered with an insulator are covered with a resin core with a reinforcing core,
At the terminal portion, a plurality of wires are branched out from the insulating outer skin with the reinforcing core and lead out, and the lead-out reinforcing cores are fastened together,
An electric wire cord, wherein a terminal fixing portion for fixing a lead position of the conducting wire is formed by insert molding at a branching portion of the plurality of conducting wires so as to include a fastening portion between the reinforcing cores.   The said terminal fixing | fixed part has a groove | channel coaxial with the said electric wire cord, or the upper end surface orthogonal to the said electric wire cord, The electric wire cord of Claim 1 or 2 characterized by the above-mentioned. An electric wire cord according to claim 3;
A socket to which a plurality of conductors of the wire cord are connected;
A locking plate attached to a groove or upper end surface formed in the terminal fixing portion;
A wire insertion hole is formed in the center, and the locking plate abuts on the lower peripheral edge of the wire insertion hole and is supported by the locking plate. The supporting member supports the socket and supports the lighting cover. And a hanging illumination device characterized by comprising:

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