JPH01274610A - Wiring device - Google Patents

Abstract

PURPOSE:To secure a box quickly and to prevent loosening due to vibration, by securing a wiring box from the rear side of floor face by means of screws to be inserted into screw holes made at four corners of a rectangular wiring box and a holding chip interlocked with the screws. CONSTITUTION:A portion of a floor panel F is notched and a rectangular under floor wiring box 2 is fitted therein. Screw holes 5b, 5e are made at four corners of the box 2. Screws 10 are inserted into the screw holes 5e thus securing a fixing frame 5 to a box body 6. A threaded shaft 8 is inserted into the screw hole 5b and supported rotatably in the shaft holes 6a, 6b of the box body 6 with the thread ridge 8a having larger diameter than the hole 5b directing upward, thus screw coupling the threaded shaft 8 with the holding chip 7. When the threaded shaft 8 is rotated, the holding chip 7 initially performs accompanied rotation and eventually contacts with a sideboard 6e and lifts then the threaded shaft 8 contacts with the rear face of the floor panel F and holds the panel F firmly. By such arrangement, the box 2 is secured quickly to the panel F thus preventing loosening due to vibration.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a wiring device.

[Conventional technology]

In recent years, with the introduction of OA equipment in offices, etc., OA
BACKGROUND ART It has become popular to wire power supplies to devices, communication lines for telephones, etc., information transmission lines for combiators, etc. to the underfloor space of a floor configured in a double-floor structure, that is, a so-called OA floor.

For example, in order to run electrical wiring under a double-floor floor panel called a raised floor, which consists of many rectangular floor panels suspended at intervals from the base floor, connecting devices such as power outlets are required. Providing wiring equipment is used. Figures 4 and 5 show a wiring device developed by the applicant.

The wiring device 80 consists of a box 81, a decorative cover 82, and connecting device blocks 83, 83'. The box 81 is fitted into the opening in the floor panel, while the connector blocks 83, 83' are mounted inside the box 81 and the decorative cover 82 is mounted on the surface of the box 81. The box 81 includes a mounting frame 84 and a box body 85, and the mounting frame 84 is screwed to the box body 85. Open the door of the decorative cover 82, insert the plug of the power cable of the OA equipment, etc. through the box opening, and connect it to the insertion hole of the connection device.

By the way, in order to install the wiring device securely, in the wiring device 80, the box 81 is fixed to the floor panel as shown below. , 84a and clamping pieces 86 located on the back side, and a screw shaft 87 for moving the clamping pieces 86.

The screw shaft 87 is rotatably supported at both ends with its head facing toward the front surface of the box, and is prevented from coming off in the axial direction. The screw shaft 87 has its shaft portion passed through the shaft holes 84b and 85b, and the screw head 87a cannot pass through the shaft hole 84b and remains in the mounting frame 84. When the screw tip 87b passes through the box bottom plate 85a, the E-ring 89 fits into the groove 87c and stops there. The shaft holes 84b and 85b have a diameter slightly larger than the diameter of the shaft portion of the screw shaft 87 (so-called "blind holes").

On the other hand, the clamping piece 86 is supported by a screw connection to a screw shaft 87, and is moved forward and backward along the screw shaft as the screw shaft 87 rotates forward and backward.

When the screw shaft 87 is rotated, the clamping piece 86 rotates together until it hits the box side plate 81c, but when it hits the same side plate 81c, instead of stopping rotation, it moves upward (or downward). The box side plate 81c serves as a stopper for preventing the clamping piece 86 from rotating. When the clamping piece 86 moves until it touches the back surface of the panel, the floor panel is clamped between it and the flange 84a, and the box 81 is fixed to the floor panel.

[Problem to be solved by the invention]

In the above-mentioned wiring device 80, the box 81 can be fixed simply by tightening the screws, and the installation can be performed quickly and easily, but there is a problem that the screw shaft 87 may come off.

Box 81 may vibrate violently during shipping, or
If the screw shaft 87 is reversed too much than necessary when releasing the fixation of the screw 1, the E-ring 89 for preventing it from coming off will come off. The clamping piece 86 is attached to the cutout side 85d of the box side plate 81c.
If the rotation continues in the reverse direction after hitting the E-ring 89, the clamping piece 86 will not advance and a strong force will be exerted to move the screw shaft 87 in the axial direction, causing the E-ring 89 to fly off.

When the E-ring 89 comes off, the screw shaft 87 comes off. In this case, the screw shaft 87 must be corrected, but it is very time-consuming because it is necessary to search for the E-ring 89 that has come off and to pull out the box 81 onto the floor panel again. In this way, the box fixing function is likely to be impaired.

In view of the above circumstances, it is an object of the present invention to provide a wiring device equipped with an excellent box fixing means that will not be damaged by vibrations or slight operational errors.

[Means to solve the problem]

In order to solve the above problem, in the wiring device of the present invention, the box has a flange located on the front side of the panel and a clamping piece located on the back side, and the box has a flange located on the front side of the panel and a clamping piece located on the back side, and the box has a flange located on the front side of the panel and a clamping piece located on the back side. It also has a screw shaft that is rotatably supported in the shaft hole and is prevented from coming off in the axial direction, and the clamping piece is supported by a screw connection to the screw shaft. As the box rotates forward and backward, it moves forward and backward along the same screw axis, and when it moves until it touches the back of the panel, the box is fixed to the panel by sandwiching the panel with the flange. In the structure, the screw shaft is prevented from coming off by having a hole large enough to allow insertion of the tip of the screwdriver jig through which the screw head cannot pass through, and the hole facing the screw head. is provided on the box itself.

[For production]

In the wiring device according to the present invention, even if the screw shaft of the means for fixing the box to the panel is subjected to vibration or excessive rotation, the screw head hits the retaining part provided on the box itself and prevents movement in the removal direction. It will be done.

Since the retaining part has a hole in which the tip of the screwdriver jig can be inserted at a position opposite to the screw head, the screw shaft can be rotated without any problem.

Of course, since the hole in the retaining portion is large enough to prevent the screw head from passing through, the screw head will not pass through the hole and move the screw shaft in the removal direction. One embodiment of such a wiring device will be described in detail with reference to the accompanying drawings.

Fig. 1 shows an exploded view of an embodiment of the wiring device according to the present invention, Fig. 2 shows a further disassembly of a part of the box of the wiring device, and Fig. 3 shows the wiring device. This is the state where the is installed on the floor panel.

The wiring device I comprises a box 2, a decorative cover 3 and a connecting device block 4.4'. The box 2 is fitted into an opening in the floor panel while the connecting device block 4.4'
is mounted inside the box 2, and the decorative cover 3 is mounted on the surface of the box 2 by screws. Box 2 has mounting frame 5
and a box body 6, and the mounting frame 5 is the box body 6.
is screwed to. The box 2 is fixed to the floor panel F in the following manner. Note that the floor panel F is suspended above the foundation floor surface G by support columns P, and the panel F serves as the upper floor of the double floor.

The box 2 is provided with flanges 5a, 5a at the longitudinal ends on the front side, and provided with a clamping piece 7 and a screw shaft 8 at each corner. The flange 5a is located on the surface side of the floor panel F when the box 2 is fitted into the opening of the floor panel F, and the clamping piece 7 is located on the surface side of the floor panel F.
Located on the back side.

On the other hand, the screw shaft 8 is rotatably supported in the shaft holes 6a and 6b at both ends with the head facing toward the box surface side. The clamping piece 7 is supported by a screw shaft 8 by screw connection.

When the screw shaft 8 is rotated, the clamping piece 7 is attached to the box side plate 6e.
It rotates together until it hits the box side plate 6e, but when it hits the same side plate 6e, it stops rotating and moves upward, and finally it hits the floor panel F.As you can see from this, there is a clamping piece on the box side plate 6e. There is a part that acts as a stopper to stop the rotation of 7. When the screw shaft 8 is rotated in the opposite direction, the clamping piece 7 moves downward. In this way, the clamping piece 7 moves forward and backward along the screw shaft 8 as the screw shaft 8 rotates forward and backward. In the fixed state, the clamping piece 7 moves until it touches the back surface of the panel and clamps the floor panel F between it and the flange 5a. Teeth are formed on the edge of the clamping piece 7 so that it can bite into the back surface of the floor panel F.

The screw shaft 8 is a so-called countersunk screw having an inverted conical screw head 8a. The shaft hole 6a is located in the screw seat 6C of the box body 6, the shaft hole 6b is located in the box bottom plate 6d, and the diameters of the two wheel holes 5a and 5b are smaller than the screw head 8a, but are larger than the shaft of the screw shaft 8. It is larger than the diameter, and is a so-called blank hole for the screw shaft 8. The inside of the shaft hole 6a has an inverted conical shape to match the shape of the screw head 8a, so that the screw head 8a is hidden inside the shaft hole 6a, and the screw [8a] does not protrude from the surface of the screw seat 60. Therefore, even if the mounting frame 5 is fixed to the box main body 6 by screwing the screw 10 into the screw hole 6f through the hole 5e, the screw head 8a is caught between the mounting frame 5 and the screw seat 6c and cannot be rotated. Never.

Next, the mounting frame 5 will be explained about how to prevent the screw shaft 8 from coming off.
A through hole 5b is provided therein. The through hole 5b faces the screw head 8a, and the screw head 8a looks through the opening 5b. When the mounting frame 5 is screwed to the box body 6, the through hole 5b is located above the shaft hole 6a. The through hole 5b is large enough to not allow the screw head 8a to pass through, so the screw shaft 8
Even if it tries to move upward, the screw head 8a hits the mounting frame 5 and the set screw shaft 8 cannot be removed. Moreover, the through hole 5b is
Since it is large enough to accommodate the tip of a screwdriver jig (driver), there is no problem in rotating the screw shaft 8. In other words, in this embodiment, a part of the mounting frame 5 is a retaining part. . Naturally, the retaining portion is provided on the box 2 itself. Of course, the conventionally used E-ring can be omitted.

Next, the other parts of the wiring device will be explained. The decorative cover 3 includes an opening frame 31 and a door 32. The opening frame 31 is fixed to the box 2 by passing the screw 33 through the hole 34 and screwing it into the screw hole 5d of the box 2. The door 32 is supported by the opening frame 31 so as to be openable and closable. When the door 32 is opened, the inside can be seen through the opening of the box 2, as shown in FIG.

Reference numeral 35 denotes a wire insertion hole for pulling out the cord of the connected device to the outside when the door 32 is closed.

In the connecting device block 4, the appliance fixing fitting 41 is equipped with a plug holder for strong electric power (high electric power connecting device) 42, 42, and in the connecting device block 4', the appliance fixing fitting 41 is attached with a plug holder for low electric power (light electric connecting device) 42, 42. Instrument) 43.43 is attached. The block 4.4' is fixed with the connecting surface facing inside the box. Connector block 4.4'
is fixed by screwing the screw 48 through the hole 5f and into the screw hole 49.The high power plug receptacle 42 and the low power plug receptacle 43 each have a high power plug, a telephone (information) jack, or a The connector of the combiator's terminal is inserted. Note that if the connecting device block 4' to which the light electrical plug receiver 43 is mounted is provided with a shield cover that covers the light electrical plug receiver 43, electrical disturbances such as noise can be effectively prevented. 45 is a cable clamp for holding down the cord 46 wired to the plug receiver 42, 43.

When connecting the heavy-duty plug (appliance to be connected) 50 to the plug receiver 42, open the door 32 as shown in FIG. Make sure to insert it into the insertion hole.

The wiring device according to the present invention is not limited to the above embodiment.

For example, the box may have a shape without a bottom plate, or may have a separable bottom plate;
It is also possible to use a box that has side plates on all sides, instead of having both sides like the box in the embodiment, and having only the hole for passing the wiring cord in the side plate.

As for the retainer, for example, in the wiring device shown in Fig. 4, there is a small plate with a hole large enough to allow the screw head to pass through but the tip of the screwdriver jig can be inserted, and the opening facing the screw head. The structure may be such that the member is fixed to the mounting frame so as to be positioned above the screw.

The wiring device may be installed not only on a double floor but also on a double wall in which wall panels are hung with a space between them relative to the foundation wall surface.

〔Effect of the invention〕

As described above, in the wiring device according to the present invention,
The removal prevention part provided on the box itself firmly prevents the screw shaft of the box fixing means from moving in the removal direction, so the box fixing means is not damaged due to vibration or incorrect operation such as excessive rotation of the screw shaft. Never.

Moreover, the retaining part has a hole in the position opposite to the screw head that does not allow the screw head to pass through, but allows the tip of the screwdriver jig to be inserted, which prevents the screw shaft from coming off and hinders the rotation of the screw shaft. Since there are no scratches, the box can be fixed quickly and easily.
It is easy to perform and maintains excellent workability.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of one embodiment of the wiring device according to the present invention, FIG. 2 is an exploded perspective view of a part of the box of the same wiring device, and FIG. 3 is a diagram showing how the wiring device is installed on a floor panel. FIG. 4 is an exploded perspective view of a reference example of the wiring device, and FIG. 5 is an exploded perspective view of a part of the box of the wiring device. 1... Wiring device 2... Box 5a...
Flange 5b...Through hole (hole of retaining part) 6
a, 6b...Shaft hole 7...Pinching piece 8...Screw shaft 8a...Screw head F...Floor panel (panel) G...Foundation floor surface (foundation surface) Agent Attorney Takehiko Matsumoto

Claims (1)

[Claims] 1 A box that is fitted into an opening of a panel that is placed with a space between the foundation surface and a connecting device that is placed inside the box, and the box is connected to the flange located on the front side of the panel and the back side. It also has a screw shaft whose head faces toward the surface of the box and is rotatably supported in the shaft hole at both ends and is prevented from coming off in the axial direction. , the clamping piece is supported by a screw connection to the screw shaft, and is adapted to move forward and backward along the screw shaft as the screw shaft rotates in the forward and reverse directions, and when it moves until it touches the back surface of the panel, , a wiring device in which a box is fixed to the panel by sandwiching the panel between the flanges, and the screw shaft is prevented from coming off by preventing the screw head from passing through, but by tightening the screwdriver jig. 1. A wiring device characterized in that the box itself is provided with a retaining portion having a hole large enough to allow insertion at the tip and the hole facing the screw head.