JPH06176612A - Structure for mounting embedded receptacle - Google Patents

Abstract

PURPOSE:To provide a simple structure for mounting an embedded receptacle, which is easy to be mounted on a ceiling panel or the like and be removed and prevents a holding member from being broken or a member colliding against the holding member from being broken. CONSTITUTION:A receptacle housing 3 has flange portions 4, 5 provided at both the upper and lower ends thereof and the flange portion 4 is provided with a plug stopping means 7 and a cover 12 is provided which has a notched groove 11 of predetermined height formed therein along the vertical direction, the notched groove 11 holding two screw rods 9 inserted between the flange portions 4, 5 from the flange portion 4, while allowing each of the screw rods to freely turn. A friction member 14 is provided by which the end of a holding member 3 is engaged in the middle portion of each screw rod 9, with the free end of the holding member 13 projected by a sufficient length to stop the holding member 13 from turning by means of at least one circumferential end of the notched groove 11, and which is caused to rise and fall, together with the holding member 13. A ceiling panel 100 is sandwiched between the lower flange portion 4 and the holding member 13, and only the friction member 14 is engaged in a threaded portion 9B when the holding member 13 is raised to an unthreaded portion 9A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling plate in which a terminal member of an appliance body of an electric appliance such as a lighting fixture, for example, a plug of a pendant pipe is inserted and embedded in a ceiling plate or a wall plate. It relates to the mounting structure of the embedded outlet that can be mounted on the etc.

[0002]

2. Description of the Related Art In recent years, in window lighting or store lighting, spot lighting means is frequently used in order to emphasize displayed products and give an accent to the lighting space. Furthermore, the decoration period on windows etc. is relatively short,
Redecoration tends to occur frequently. On the contrary,
As this kind of illuminating means also, it is required to change the spot irradiation position or change the irradiation direction for each pattern change. As a result, there is a bendable structure part such as a joint joint so that the irradiation direction can be changed relatively easily. In addition, an instrument has been developed in which the terminal member is rotatable. Moreover,
With the recent development of small-sized halogen lamps, it has become possible to make small-sized lighting fixtures that are compact and have high brightness and excellent color rendering. However, the above-mentioned various appliances cannot easily change the mounting position on the ceiling plate, the wall plate, etc., and the mechanism such as rotation and rotation is added to each part of the appliance body and the terminal member. Therefore, in order to make it easier to use the instrument body to which such a mechanism is added, there has been a demand for an embedded outlet that can be easily attached to and removed from a ceiling plate or the like. By the way, when adopting such an embedded outlet, there are concerns about difficulties in construction. That is, at this type of display construction site, many decorative ceilings are adopted, and the gap between the floor above the floor and the decorative ceiling below is narrow, and there is no room for workers to enter the ceiling behind this gap, In such a case, the lower surface of the ceiling is inserted into the ceiling hole. As an example of the electric device installed in this ceiling hole, there is a technique described in Japanese Utility Model Publication No. 60-29782. This technology relates to a fixture for an embedded installation device, which is screwed to an intermediate position of the screw member by rotating a screw member that is threaded over the entire length facing the lower surface flange of the device body inserted in the ceiling hole. The tightening arm is pivotally moved to the clamping action area and lowered to clamp the ceiling material and the like with the flange. Further, at the time of removal, the screw member is rotated in the opposite direction with an electric screwdriver or the like to raise the tightening arm.

[0003]

According to the structure described in the above publication, the structure is required such as an L-shaped metal fitting for installing the tightening arm and a spring for surely operating the arm. I hate it because it is complicated and has many parts. Further, when the screw member is rotated in the opposite direction by the electric screwdriver when detaching, there is a possibility that the tightening arm may rise excessively and the L-shaped metal fitting may be damaged, or the tightening arm hit by the L-shaped metal fitting may be damaged. there were.

Therefore, the present invention has a simple structure with a small number of parts and can be easily attached to and detached from a ceiling plate or the like, and in particular, a clamping member (conventional tightening arm) for clamping the ceiling from above at the time of removal is damaged. It is an object of the present invention to provide a mounting structure for an embedded outlet that prevents damage to a member that collides with a holding member.

[0005]

In order to achieve the above-mentioned object, the present invention has an outlet main body in which the plug of the terminal member on the instrument main body side is inserted, which is arranged in the center of the lower surface, and which is connected to the power supply side on the upper surface. The upper and lower ends of the outlet housing made of an insulating material in which the cord is arranged are provided with flange portions that extend outward in the radial direction, respectively, and fastenings for attaching the plug side to the lower or lower flange portions of the outlet housing. A peripheral wall corresponding to the side surface of the threaded rod and rotatably holding at least two screw rods inserted from the lower collar portion between the upper and lower brim portions and covering the outlet housing and the threaded rod. A cover with a predetermined width in the circumferential direction and a notched groove with a predetermined height in the vertical direction is provided at the position of the, and the base end side of the holding member is screwed into the middle part of each screw rod and is free. If the end side is a notch in the cover The clamping member that swivels outward with the rotation of the screw rod is extended to a length that can prevent rotation of the clamping member at least at one end in the circumferential direction of the notch groove, and the clamping member closely contacts the screw rod screwing point of each clamping member. A friction member is provided so as to ascend and descend together, and each screw rod is rotated in one direction to bring the free end side of the holding member into contact with one end of the notch groove in the circumferential direction, and then the screw rod is further rotated to move the holding member. It is configured so that it lowers and sandwiches the ceiling plate, etc. between the lower collar part and the clamping member, and forms a non-threaded part in the vicinity of the collar part above each screw rod, and with each screw rod rotating in the other direction. When the holding member is raised to the non-threaded portion, only the friction member is screwed into the threaded portion of the threaded rod.

[0006]

In the present invention, when mounting on a ceiling or the like,
Insert the outlet into the mounting hole of the ceiling with the holding member housed in the outlet housing, bring the lower collar part into contact with the lower surface of the ceiling, and rotate the screw rod to move the holding member to one end position of the notch groove in the circumferential direction. Turn to. When the screw rod is further rotated in the same direction, the holding member descends and comes into contact with the upper surface of the ceiling. Further, by rotating the screw rod, the ceiling is firmly sandwiched between the lower collar portion and the sandwiching member, and the outlet is mounted on the ceiling. To remove this installed outlet,
The screw rod may be rotated in the opposite direction.At this time, when the screw rod is rotated at a high speed by using an electric screwdriver, the holding member tries to collide with the upper collar portion. Since it exists, the holding member ascends to this non-screwed portion and idles at this position. At this time, the friction member remains screwed into the threaded portion, so that when the holding member is lowered next time, the holding member is guided by the friction member and the holding member is also screwed into the threaded portion again.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings.

In the embodiment shown in FIG. 1, an outlet housing made of an insulating material, for example, an insulating resin molded body, in which an outlet body 1 is arranged in the center of the lower surface and a cord 2 for connecting to a power supply side is arranged on the upper surface. Collar portions 4 and 5 extending outward in the radial direction are provided on both end sides of 3, respectively. The lower flange portion 4 is formed integrally with the outlet housing 3, and the lower end side of the outlet housing 3 is extended below the flange portion 4 to form an extension portion 6. A male screw portion 8 is formed on the outer periphery of the extending portion 6 as a fastening means 7 for attaching the plug side. Between the upper and lower flange portions 4 and 5 of the outlet housing 3, at least two screw rods 9 and 9 inserted from the lower flange portion 4 are rotatably held. A non-screwed portion 9A is formed in the vicinity of the flange portion 5 on each screw rod 9, and the screw portion 9B has a sandwiching member 1 described later.
Screw with 3. The tip ends of these screw rods 9 and 9 penetrate the upper collar portion 5 and are rotatably supported by an E-ring 10 so that they do not fall downward. A notch groove that has a predetermined width in the circumferential direction and has a predetermined height in the upper and lower direction so as to cover the screw rods 9 and 9 and the outlet housing 3 and at a portion of the peripheral wall 12A corresponding to the side surface of the screw rods 9 and 9. A cover 12 provided with 11, 11 is provided. The upper collar 5 may be integrally formed with the cover 12. The proximal ends of the holding members 13, 13 are screwed into the intermediate portions of the screw rods 9, 9 and the free ends are rotated outward from the cutout grooves 11, 11 of the cover 12 in one direction. The holding members 13 and 13 that rotate together are extended by a length that can prevent the rotation of at least one end 11A or 11B (see FIG. 2) in the circumferential direction of the cutout grooves 11 and 11. Further, friction members 14, 14 made of rubber rings or the like are fitted under the screwing portions of the screw rods 9, 9 of the holding members 13, 13. This friction member 14
A rubber ring 15 similar to that is fitted to the side of the collar 4 below the screw rod 9 to prevent the screw rod 9 from rattling. Each friction member 14 is positioned below the holding member 13 by a clamper 14A. Clamping member 1 by rotating each screw rod 9, 9
The free end sides of 3 and 13 are provided at both ends 1 in the circumferential direction of the notch grooves 11 and 11.
After being brought into contact with either 1A or 11B, the screw rods 9 and 9 can be further rotated to lower the holding members 13 and 13. If the raising of the holding members 13, 13 is started after the lowering contacts the one end 11B, it may be brought into contact with the other end 11A.
The circumferential width of 1 is equal to or greater than the length of the sandwiching members 13, 13,
Alternatively, the free ends of the holding members 13, 13 may be brought into contact with the outlet housing 3, and the screw rods 9, 9 may be further rotated to raise them. According to this structure, the hole 1 of the ceiling plate 100
01 can be easily inserted, and the diameter of the hole can be reduced. The sandwiching members 13 and 13 and the lower collar portion 4 sandwich the ceiling plate 100 or the like so that an outlet can be embedded in a hole 101 formed in the ceiling plate 100 to be attached. There may be three or more screw rods 9 having such a holding member 13.

An inner electrode cylinder 17 into which the electrode rod 16 on the plug side is inserted is provided in the center of the outlet housing 3, and an outer electrode cylinder 19 is provided outside the inner electrode cylinder 17 via an insulating cylinder 18.
Is provided along the inner peripheral surface of the outlet housing 3. Provided on the inner peripheral surface of the outer electrode cylinder 19 are a plurality of elastic electrode pieces 21 which come into contact with the outer periphery of the electrode ring 20 at a plurality of positions in the vertical direction when the electrode ring 20 provided around the electrode rod 16 is inserted. The outlet main body 1 having the electrodes arranged on the concentric axis is configured. The electrode rod 16 is supported by an insulating piece member 22, and an electrode ring 20 is provided outside the piece member 22. Further, the piece member 22 is attached to a pendant pipe 23 which serves as a terminal member. Furthermore, the pendant pipe 23
An insulating rotary cylinder 24 is provided on the upper end side of the outer circumference of the, and a tightening ring 25 is provided on the upper end side of the rotary cylinder 24. A female screw portion is formed on the inner peripheral surface of the tightening ring 25 and is screwed into the male screw portion 8. A decorative cover 26 is attached to the lower collar portion 4 so as to hide the tightening ring 25 in a state where the tightening ring 25 is fixed to the fixing means 7 formed on the outer periphery of the extending portion 6. The rotary cylinder 24 is rotatable with respect to the pendant pipe 23, and the flange at the upper end is supported from below by the flange at the lower end of the tightening ring 25. In the state where the tightening ring 25 is screwed into the male screw portion 8 of the extension portion 6,
The pendant pipe 23 is rotatable with respect to the rotary cylinder 24. Further, both the electrode rod 16 of the plug and the electrode ring 20 can be rotated while being inserted into the outlet main body 1, and as a result,
The terminal member of the instrument body, that is, the pendant pipe 23 in this example, can freely rotate around its axis.

FIG. 2 is a partial perspective view of the outlet side before the plug is inserted, in which the screw rods 9, 9 and the holding plates 13, 13 are exposed in the notch grooves 11, 11 formed on both sides of the cover 12. The projection 27 is formed on the lower surface of the holding plate 13 on the free end side. The screw rod 9 is rotated so that the free end side of the sandwiching member 13 is brought into contact with one end 11B in the circumferential direction of the notch groove 11, and then the screw rod 9 is further rotated in one direction, whereby the sandwiching member 13 is further moved. It descends because it does not turn. The rotation of the screw rod 9 is caused by the head 9 of the screw rod 9.
It suffices to insert a Phillips screwdriver into the Phillips groove formed in C and rotate it. When the sandwiching member 13 descends due to the rotation of the screw rod 9, the friction member 14 also descends while coming into contact with the sandwiching member 13. In FIG. 2, when the holding member 27 is raised, for example, when it is removed from the state where it is attached to the ceiling plate 100, and when it is pulled out from the hole 101, the screw rod 9 is rotated in the direction opposite to that described above. At this time, since the friction member 14 is in close contact with the holding member 13 by the clamper 14A, the holding member 13 is swung from the one end 11B to the other end 11A, and the free end of the holding member 13 is moved to the outer peripheral surface of the outlet housing 3. Abut. When the screw rod 9 is further rotated, the holding member 13 rises together with the friction member 14. The friction member 14 ensures that the holding member 13 pivots when the screw rod 9 starts rotating. That is, when the screw rod 9 rotates, the friction member 14 also rotates, and this rotational force is transmitted to the sandwiching member 13 that is in close contact with the friction member 14, so that the sandwiching member 13 can be prevented from idling and reliably rotated. If the sandwiching member 13 is thin, it may idle without following the rotation of the screw rod 9, but due to the presence of the friction member 14, it will swivel in response to the rotation of the screw rod 9.

FIG. 3 shows a state in which the friction member 14 reaches the upper end of the threaded portion 9B and the holding member 13 is raised to the position of the non-threaded portion 9A. If the screw rod 9 is loosely rotated in the reverse direction using an electric screwdriver when the outlet is removed, the screw rod 9 may be rotated more than necessary. Even in this case, in the present invention, the holding member 13 is When it rises to the position of the non-threaded portion 9A, it does not rise further. To lower the holding member 13 from the state shown in FIG. 3, the friction member 1
Since 4 is in close contact with the threaded portion 9B, when the screw rod 9 is rotated in one direction in the tightening direction, the friction member 14 will move to the threaded portion 9B.
The nipping member 13 connected by the clamper 14A is also lowered in the area of the non-screwed portion 9A by being guided by the screw thread of B and descending. By the subsequent rotation of the screw rod 9, the holding member 13 is screwed into the screw portion 9B.
After that, the screw rod 9 descends while being directly regulated by the rotation of the screw rod 9.

FIG. 4 shows an example of mounting a lighting fixture using the outlet of the present invention, which is provided in an outlet housing 3 of an embedded outlet fixed in a hole 101 formed in a ceiling plate 100. Insert the plug of the pendant pipe 23 into the outlet body 1 and fix the plug side to the fastening means 7
Fastened to. The pendant pipe 23 is rotatable in a horizontal movement, and a joint end portion 30 employed in an L-shaped bent portion allows the tip end portion of the pipe to be swung vertically. A halogen lamp 31 with a mirror is provided at the tip of the pendant pipe 23, and the direction of irradiation of the halogen lamp 31 can be variably adjusted over almost the entire installation space. Further, the knob 32 can rotate the joint joint 30.

In the illustrated embodiment, the male screw portion 8 is formed as the fastening means 7, but other known fastening means can be adopted. Moreover, it is preferable to use a relatively flexible wire cord 2 such as a bag-punching cord as the wiring cord 2 which is connected to the commercial power source electric wire that is ceiling-wired or is connected by interposing a down transformer between the electric wires. In addition, the plurality of elastic electrode pieces 21 are provided along the axial direction of the outer electrode cylinder 19, and both ends thereof are supported by the outer electrode cylinder 19 and are rod-shaped or plate-shaped. A plurality of them are arranged at substantially equal intervals along the surface. Therefore, the electrode ring 20 inserted into the outer electrode cylinder 19 is sandwiched substantially uniformly by the plurality of elastic electrode pieces 21.
Therefore, even when the pendant pipe 23 on the plug side is L-shaped so that an eccentric load is generated, its holding is reliable and a plurality of elastic electrode pieces 2 electrically arranged on the circumference are provided.
1 makes it possible to widen the contact surface between the electrodes, disperse the lighting current, and suppress contact heat generation. That is, the electrode ring 20 is formed by the plurality of elastic electrode pieces 21.
The mechanical holding is ensured and the electrical connection is ensured.

In the embodiment shown in FIG. 1, the outlet is inserted into the hole 101 before the plug is inserted into the outlet and the screw rod 9 is rotated in one direction on the side of the head 9A so that the free end side of the holding member 13 turns. Then, it hits one end 11B of the notch groove 11. When the screw rod 9 is further rotated in the same direction even after the holding member 13 hits the one end 11B of the cutout groove 11,
The holding member 13 descends. At this time, the friction member 14 also comes into close contact with the holding member 13 and descends together. The sandwiching member 14 collides with the ceiling plate 100, and the projection 27 is further attached to the ceiling plate 100.
If the screw rod 9 is rotated so as to bite into the gripping member 13,
The ceiling plate 100 is firmly sandwiched between the flange portion 4 and the collar portion 4, and the outlet is securely and easily attached around the hole 101 of the ceiling plate. After that, the plug side is inserted as shown in FIG. 1 and the plug side is fixed to the fixing means 7, so that the pendant pipe 23 is firmly attached to the outlet. The pendant pipe 23 and the rotary cylinder 24 are rotatable relative to each other, so that the plug side freely rotates in the state shown in FIG.

[0015]

As described above, according to the mounting structure of the embedded type outlet of the present invention, even when a worker cannot enter the ceiling or the like, the outlet can be inserted into the hole from the bottom side of the ceiling. By rotating the screw rod from the outside, the ceiling plate is firmly sandwiched by the sandwiching member and the flange portion, and at this time, the friction member surely starts the swiveling of the sandwiching member. Therefore, even a thin sandwiching member can operate reliably without idling, and an increase in cost and weight due to the use of a thick sandwiching member can be eliminated. Moreover, the number of parts is smaller than that of the conventional one, and the structure is simple. Further, since the outlet has the fastening portion, the pendant pipe can be firmly attached by fastening the plug side to the fastening portion. Further, even if an electric screwdriver is used during removal, there is no possibility that the holding member will rise excessively and hit the upper flange portion, thereby damaging both.
Further, since the holding member is prevented from rising by the non-screwed portion, it is not necessary to turn the driver by hand to prevent damage, and in other words, it is possible to use an electric screwdriver with good work efficiency. Become.

[Brief description of drawings]

FIG. 1 is a sectional view of a plug inserted state showing a preferred embodiment of the present invention.

FIG. 2 is a perspective view showing a part of the outlet side.

FIG. 3 is an enlarged cross-sectional view of a screw rod upper end side.

FIG. 4 is a side view showing a state in which a lighting fixture is attached.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outlet main body 2 Wiring cord 3 Outlet housing 4,5 Collar part 7 Fastening means 9 Screw rod 9A Non-screw part 9B Screw part 11 Notch groove 12 Cover 13 Clamping member 14 Friction member

Claims (1)

[Claims] 1. An upper and lower end of an outlet casing made of an insulating material, in which an outlet main body into which a plug of a terminal member on an instrument main body side is inserted is arranged in the center of a lower surface and a wiring cord for connecting to a power supply side is arranged on an upper surface. Side is provided with a flange portion that extends radially outward, and a fastening means for attaching the plug side to the lower end side or the lower side flange portion of the outlet housing is provided, and the upper and lower flange portions are inserted from the lower flange portion. Rotatably holding at least two screw rods, which have a predetermined width in the circumferential direction and a predetermined height in the peripheral wall portion so as to cover the outlet housing and the screw rod and correspond to the side surface of the screw rod. A cover with a notch groove having a height of 10 mm is provided, the base end side of the holding member is screwed into the middle part of each screw rod, and the free end side is outward from the notch groove of the cover as the screw rod rotates. Of the clamping member The cutout groove is extended so that it can be stopped at at least one end in the circumferential direction, and a friction member is provided so as to come into close contact with the lower side of the screw rod screwing point of each holding member and ascend and descend together with the holding member. After rotating in one direction to bring the free end side of the sandwiching member into contact with one end of the notch groove in the circumferential direction, the screw rod is further rotated to lower the sandwiching member, thereby lowering the ceiling plate and the like by the lower collar portion and the sandwiching member. The non-screw part is formed in the vicinity of the flange part on each screw rod, and only the friction member is raised when the sandwiching member is raised to the non-screw part as the screw rod rotates in the other direction. A mounting structure for an embedded outlet, characterized in that it is configured to be screwed into a threaded portion of a threaded rod.