JPH0412928Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] (Industrial application field) This invention is used for electrical equipment construction work on plate floor boards called F decks in buildings and other architectural structures. The present invention relates to a device for mounting a wiring box to a plate floor board for mounting a recessed type wiring box.

(Prior Art) When constructing a building or other architectural structure, when the floor and ceiling are made of concrete, a plate floor slab called a deck plate, keystone plate, or F deck is recently installed. Then, in order to carry out various types of wiring for electrical equipment work, an embedded wiring box is temporarily fixed on the plate floor board, and then concrete is poured to form a concrete floor.

In such cases, conventionally, to temporarily fix the wiring box to the formwork when constructing a concrete ceiling, etc., for example, a mounting box for electrical appliances etc. according to Japanese Utility Model Publication No. 45-21581 has been used. A mounting bracket was proposed.

This mounting bracket inserts a clasp with a grooved cross section into a stud bolt that is fixed upright on the formwork surface, and engages both ends of the clasp with the inner edge of the coating cover fixed to the opening of the wiring box. The clasp is fixed by screwing into the bolt a nut that presses the clasp against the formwork surface.

(Problem to be solved by the invention) However, in the conventional mounting bracket described above, the bolt is installed vertically on the formwork surface, so if the temporary fixing surface is the plate floor plate mentioned above, which is made of metal, it will be difficult to Installation work is difficult.

Additionally, the plate slab that has been laid will remain as it is as a structure to support the concrete that will be poured. Then, in order to conduct wiring through the constructed floor or ceiling slab at the top and bottom, a large diameter through hole is opened in the plate floor board using a hole saw or the like before temporarily fixing the wiring box.
Therefore, if the through-holes are opened in the plate floor board in advance, it is completely impossible to erect the stud bolts as described above, and in the end, in the floor work using the plate floor board, the above-mentioned conventional method is impossible. Mounting hardware cannot be used.

Therefore, this invention was devised in view of the various drawbacks that existed in the past as mentioned above. To provide a device for mounting a wiring box to a plate floor board, which can be easily installed as one-side construction on the upper surface of the floor board and is reusable.

[Structure of the invention] (Means for solving the problem) The device for mounting a wiring box to a plate floor board of this invention has an abutment that comes into contact with the lower surface of the plate bed board at the outer edge of a through hole opened in the plate bed board. a lower clamping body having contacts at both ends and disposed outside the wiring box; an upper clamping body disposed inside the wiring box and having both ends engaged with the inner surface of the opening edge of the wiring box; and the lower clamping body. A fixing bolt is fixed to the lower end, and the fixing bolt is loosely inserted into the upper clamping body, and the upper end is regulated by a pressing nut screwed into the upper part of the fixing bolt, and the regulating bolt is inserted into the fixing bolt in a freely insertable and removable manner. It is characterized in that it has a pressing spring whose lower end is regulated by the pin and which is pressed against the upper surface of the upper holding body when the regulating pin is removed.

(Function) The device for attaching the wiring box to the plate floor board of this invention having the above-described structure is inserted into the wiring box and attached together with the wiring box to the through hole of the plate floor board.

That is, by utilizing the fact that the fixing bolt and the upper clamping body are free, and changing the inclination of the fixing bolt and the upper clamping body, the lower clamping body at the lower end of the fixing bolt is moved out of the opening of the wiring box, and the upper clamping body is moved out of the opening of the wiring box. Place the body inside the wiring box. At this time, the pressing spring is compressed in a state where elastic force that tends to expand is accumulated between the regulating nut and the regulating pin. After that, the lower clamping body is passed through the through-hole and moved out below the plate floor, the opening edge of the wiring box is fitted into the through-hole, and both ends of the upper clamping body are engaged with the inner surface of the wiring box opening edge. .

Next, when the regulating pin that has penetrated the fixing bolt is removed, the pressing spring expands and presses against the upper surface of the upper clamping body due to its elastic action, and the fixing bolt and lower clamping force are released due to the elastic force. The body is pulled together, and both ends of the lower clamping body come into contact with the lower surface of the plate floor outside the periphery of the through hole.

The elastic force of the pressing spring causes the opening of the wiring box to be held between the lower clamping body and the upper clamping body together with the plate floor, thereby fixing the wiring box to the plate floor.

To remove the spring, either force the pressure spring against the restriction nut and insert the restriction pin into the fixing bolt to maintain the compression spring itself in its contracted state, or tighten the restriction nut with the screw. This is done by releasing the regulating pin and releasing its repelling action.

(Example) Hereinafter, an example of this invention will be described with reference to the drawings.

Reference numeral 1 shown in the figure is a lower clamping body,
It is inserted into a through hole H opened in a plate floor P such as a deck plate, a keystone plate, or an F deck, and is disposed on the lower surface of the plate floor P.

That is, when a wiring box B such as a recessed outlet box or outlet box is installed in a through hole H opened in a plate floor P in accordance with a predetermined design in electrical equipment construction, the wiring box B placed on the bottom surface of the plate floor P The plate floor P and the opening edge of the wiring box B are clamped and fixed by the lower clamping body 1 located in the wiring box B and the upper clamping body 5 disposed inside the wiring box B. When the wiring box B is attached to the through hole H, normally, as shown in the figure, a paint allowance cover C is fixed to the opening edge of the wiring box B, and the narrowed opening part of this paint allowance cover C is attached to the through hole H. be fitted inside.

The lower clamping body 1 itself has a substantially groove-shaped cross section, and protruding contact pieces 2 are provided at both ends thereof to abut against the lower surface of the plate floor P at the outer edge of the through hole H. The distance between the abutting pieces 2 along the length direction of the lower clamping body 1 is larger than the outer diameter of the opening of the coating allowance cover C, and the height of the abutting pieces 2 is greater than the distance from the through hole H. It is made larger than the height of the opening portion of the paint allowance cover C that projects downward. In short, the lower clamping body 1 is the plate floor plate P.
It is sufficient that the lower clamping body 1 is disposed on the lower surface and comes into contact only with the lower surface of the plate floor P when sandwiching the plate floor P and the opening edge of the wiring box B together with the fixing bolts 3.

Further, the lower clamping body 1 is fixed to the lower end of the fixing bolt 3, and the upper clamping body 5 is combined with the fixing bolt 3 in a penetrating manner, and the upper clamping body 5 is connected to the wiring box B.
The wiring box B is disposed inside the wiring box B and comes into contact with the inner edge surface of the opening of the wiring box B.

In the illustration, the fixing bolt 3 is fixed to the lower clamping body 1 by inserting the lower end of the fixing bolt 3 into a through hole drilled approximately in the center of the lower clamping body 1, and pressing it against the upper and lower surfaces of the lower clamping body 1. This is achieved by screwing the fixing nut 4 into the fixing bolt 3. Of course, fixing the fixing bolt 3 to the lower holding body 1 is not limited to the fixing nut 4, but may be an integral welded structure, and the fixing structure can be selected arbitrarily.

As shown in the figure, the upper clamping body 5 has a substantially groove-shaped cross section, and has a slightly large-diameter loose through hole 6 opened approximately in the center, through which the fixing bolt 3 is loosely inserted, and both ends thereof are connected to the opening of the wiring box B. It engages with the inner side of the edge, specifically the inner side of the narrowed opening in the paint allowance cover C, and presses and moves the entire wiring box B toward the lower holding body 1.

In order to press and move the upper clamping body 5 toward the lower clamping body 1, the elastic spreading force of the pressing spring 9, which is pressed against the upper surface of the upper clamping body 5 above the upper clamping body 5, can be released. It is arranged in such a way that it is accumulated.

That is, the pressing spring 9 is formed into a coil shape that is inserted through the fixing bolt 3, and its upper end is regulated by a regulating nut 7 that is screwed into the upper part of the fixing bolt 3. The lower end is regulated by the pin 8, so that it is compressed. Then, when the regulating pin 8 is removed from the fixing bolt 3, the pressing spring 9 expands and its lower end is elastically pressed against the upper surface of the upper clamping body 5.

The regulating nut 7 has a wing nut structure that allows it to be rotated smoothly by hand.

Further, when the upper clamping body 5 is set in the wiring box B, the lower clamping body 1, which is integrated with the fixing bolt 3, is placed inside the wiring box B.
Since it is placed outside, when setting it in the wiring box B and attaching it to the plate floor P, the upper clamping body 5 itself can be moved above the fixing bolt 3 so that it is free from the lower clamping body 1. , while maintaining penetration with the fixing bolt 3, there is some play.

This then explains its use.

First, apply paint cover C to the opening edge of wiring box B.
For example, if the other opening of the wiring box B is known, insert it into this devised mounting device, take advantage of the fact that the wiring box B and the upper clamping body 5 are free, and fix it to the lower end of the fixing bolt 3. The lower holding body 1 is placed outside. At this time, the regulating pin 8 is inserted through the fixing bolt 3, and the pressing spring 9 is compressed between the regulating pin 8 and the regulating nut 7, thereby accumulating elastic force.

Next, as shown in FIG.
While fitting the coating allowance cover C into the through hole H opened at the bottom, the lower clamping body 1 is moved out below the plate floor P while tilting the fixing bolt 3. In this state, both ends of the upper clamping body 5 are engaged with the inner surface of the opening edge of the wiring box B, specifically, the inner edge surface of the opening of the coating allowance cover C, and the regulating pin 8 is pulled out from the fixing bolt 3 to ensure that it is not compressed. The pressing spring 9 is expanded and pressed against the upper surface of the upper clamping body 5 (see Figs. 1 and 2).
(see figure).

Then, as the pressing spring 9 elastically expands, the fixing bolt 3 and the lower clamping body 1 are pulled together, and both ends of the lower clamping body 1 come into contact with the lower surface of the plate base P outside the periphery of the lower clamping body 1. Due to this elastic expansion of the pressing spring 9, the opening of the wiring box B is sandwiched between the lower clamping body 1 and the upper clamping body 5 together with the plate floor P, and the wiring box B is held onto the plate floor P. Fix it.

Along with fixing the wiring box B to the plate floor P, electrical conduits and other equipment are connected to the wiring box B, and the lid is placed.Concrete is then poured, and after curing and solidifying for an appropriate period, the invented device is installed. removed.

To remove, force the pressing spring 9 toward the regulating nut 7 and attach the regulating pin 8 to the fixing bolt 3.
The pressing spring 9 itself can be maintained in a contracted state by inserting it through the pin, or by unscrewing the restricting nut 7 and releasing the elastic action of the restricting pin 8.

[Effects of the invention] This invention is configured as described above, and therefore, when installing wiring box B in electrical equipment work on metal plate floor board P, an opening corresponding to the opening of wiring box B is made. It can be easily installed in the through hole H by one-sided construction on the top surface of the plate floor P.

That is, the through-hole H is used, and the lower clamping body 1 disposed on the outside of the wiring box B and the inside of the wiring box B are provided with contact pieces 2 at both ends that come into contact with the lower surface of the plate floor P at the outer edge of the through-hole H. The upper clamping body 5, which is disposed at
Press the opening with the plate floor plate P using the pressing spring 9.
The wiring box B can be securely fixed to the plate floor P because it is sandwiched by the elastic stretching action of the wires.

The fixing bolt 3 fixes the lower clamping body 1 to its lower end, and even though it is integrated therewith, it is combined with the upper clamping body 5 in a loose penetrating state.
For work inside wiring box B, for example, moving the lower clamping body 1 out of the opening of wiring box B and out of the through hole H, or taking it into wiring box B when removing it, use the fixing bolt 3. This can be easily done by changing the inclination of the upper clamping body 5.

When the lower clamping body 1 and the upper clamping body 5 sandwich the opening edge of the wiring box B and the plate floor P, the upper end is regulated by the pressing nut 7 screwed into the upper part of the fixing bolt 3, and the fixing bolt The lower end is regulated by a regulating pin 8 which is inserted and removably inserted into 3.
This is a simple one-touch operation by removing the regulating pin 8 because it can be performed by the elastic force of the expansion of the pressing spring 9 pressed against the upper surface of the upper clamping body 5 as the regulating pin 8 is withdrawn.

Moreover, the attached state is stable due to the strong elastic force, and it will not come off even under the pressure of concrete being placed.Furthermore, it is easy to remove and can be reused.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
The figure is a front sectional view in a used state, FIG. 2 is a side sectional view, and FIG. 3 is a schematic sectional view showing a state when installed. P...Plate floorboard, B...Wiring box, H
...Through hole, C...Painting allowance cover, 1...Lower clamping body, 2...Abutment piece, 3...Fixing bolt, 4...Fixing nut, 5...Upper clamping body, 6...Free penetration Hole, 7...
...Regulation nut, 8...Regulation pin, 9...Press spring.

Claims (1)

[Scope of utility model registration request] a lower clamping body disposed on the outside of the wiring box and having contact pieces at both ends that abut against the lower surface of the plate floor at the outer edge of the through hole opened in the plate floor;
an upper clamping body disposed inside the wiring box and having both ends engaged with the inner surface of the opening edge of the wiring box;
The lower clamping body is fixed to the lower end, and the upper end is regulated by a fixing bolt loosely inserted into the upper clamping body and a pressing nut screwed into the upper part of the fixing bolt, so that it can be inserted into and removed from the fixing bolt. 1. A device for mounting a wiring box to a plate floor board, characterized in that the lower end is regulated by a regulating pin inserted through the wiring box, and a pressing spring is pressed against the upper surface of the upper clamping body when the regulating pin is removed.