JPS5814127B2 - Installation device for embedded boxes on temporary concrete frames - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for attaching an embedded switch box, an outresoto box, etc. to a temporary concrete frame when embedding the embedded switch box, outresoto box, etc. in a concrete wall surface, etc. during construction. Therefore, the box can be easily and reliably attached to a desired position on the temporary frame.

Conventionally, boxes embedded in concrete walls have been fixed to temporary frames so that they will not move during concrete pouring, but in this case, a steel wire is connected to the box in advance, and this is connected from above between the temporary frames. The box is lowered to a fixed position, a hole is drilled in the temporary frame from the outside, the iron wire is pulled out using this hole, and the iron wire is twisted to press the box against the temporary frame and fix it.

This method is very troublesome because it requires drilling holes in the temporary frame, and the temporary frame is seriously damaged.

Moreover, two workers are required, one to lower the box from above and one to fix the box to the temporary frame from below, resulting in poor work efficiency and a rise in construction costs.

Therefore, in order to solve the above-mentioned drawbacks, the inventors of the present invention
A method that can be carried out by one person is to use an arc-curved guide tube, advance the driving object into the guide tube by hitting it from above, and drive it into the temporary frame, thereby fixing the box to the temporary frame. (Sho Kai No. 50-150239).

In this case, when the tip of the driving body is driven into the temporary frame by impact, in order to prevent the box from separating from the temporary frame due to reaction, the present invention, for example, is provided between the box back plate and the other temporary frame. A tensioning device proposed by
63719) etc., the box was brought into contact with the temporary frame and temporarily fixed under tension.

However, in the case of the method described above, even if the box is tensioned and fixed using a tensioning device, when driving by hitting from above, the temporary frame may be temporarily damaged due to the advancing action of the driving body toward the temporary frame. The box may be pushed outward and escape, making it impossible to drive the driving object into the temporary frame, or the tensioning device may temporarily become unfixed, causing the tensioning device or the box to fall. .

Moreover, when the hitting operation is performed from above, mistakes are likely to occur because the hitting target is quite small.

Furthermore, once the box is attached to the temporary frame as described above, it is extremely difficult to change the attachment position thereafter.

In order to solve the above-mentioned drawbacks, the present invention has a structure in which wood screws installed inside the box are rotated forward toward the temporary frame by operating from above, and the box is moved to a desired position on the temporary frame by screwing in the wood screws. It is designed to be installed easily and reliably.

Next, embodiments of the present invention will be described based on the drawings.

First, in the embodiment shown in Figs. 1 to 5, A is a switch box, an outresoto box, or other wall-embedded box, A' is a connecting hole formed on the top plate of the box, and B is a pipe for introducing wiring. are concatenated.

Reference numeral 1 denotes a base having a substantially U-shaped cross section that fits over the front opening of the box A and is fixed to the box back plate A1 with screws 2, and the screw shaft 3 is located approximately in the center of the front face of the vertical part of the base 1 so as to face forward. It is installed protrudingly.

The screw shaft 3 may be screwed through from the rear side and fixed as shown in the figure, or it may be integrally provided by welding or the like.

The length of the screw shaft 3 is preferably around one depth of the box A. If the base 1 is thick, a circular recess 4 is formed in the front face of the base as shown in the figure. screw shaft 3 in the center of
It is good to protrude.

Reference numeral 5 denotes a reciprocating member which is screwed onto the screw shaft 3 from the front, and is formed to be slightly longer than the protruding length of the screw shaft 3. At the center of the front end, a wood screw 6 having the same lead as the screw shaft 3 is connected to the screw shaft 3. They are protruded so that they are on the same axis.

The length of the wood screw is such that when the reciprocating member 5 is screwed to the position where it contacts the base 1, the tip thereof is located exactly near the front opening of the box A (see FIG. 2).

Before the box is attached to the temporary frame C, it is set in the above state.

It is preferable that the wood screw 6 is inserted into a small hole in the front of the reciprocating member 5 and fixed with a set screw 7.

Reference numeral 8 denotes a rotation transmitting member fitted to the outer periphery of the reciprocating member 5, and its fitting structure is a structure using a spline or a sliding key as a shield, so that the retracting member 5 can rotate together with it and can slide against each other in the axial direction. We have made it possible.

Reference numeral 9 indicates a key portion that engages the reciprocating member 5 and the rotation transmitting member 8.

A bevel gear 10 is provided on a part of the outer circumference of the rotation transmission member 8, and the bevel gear 10 is connected to a bevel gear 1 fixed on a shaft 11.
It meshes with 2.

The shaft 11 is the upper water portion 1 of the base 1 having a substantially U-shaped cross section.
The upper end 11a of the shaft 11 is located at the center of the connecting hole A' in the box upper plate and slightly protrudes outside the box. It is being

The upper end portion 11a is formed into a rectangular shaft shape such as a square or hexagon, into which a head portion 13a with a square hole provided at the tip of the rotary operating tool 13 can be fitted. By rotating the shaft 11 with the rotation operating tool 13, the rotation transmission member 8 is transmitted via the bevel gears 12 and 10.
And the advancing/retracting member 5 can be rotated.

Therefore, the rotation transmitting member 8, bevel gears 10 and 12, shaft 11, etc. constitute means for imparting rotation to the advancing/retracting member 8.

The upper end 11a of the shaft 11 may be slightly tapered to facilitate fitting of the head 13a with a square hole.

Note that the upper end 11a of the shaft 11 is not limited to being formed into a square shaft shape, and may have a square hole 14 opened in the upper surface as shown in FIG. 5. In this case, the rotary operating tool 13 is What is necessary is to use one having a square shaft-shaped head 13b that can be fitted into the square hole 14.

Reference numeral 15 denotes a holding plate fixed to the base 1 with screws, and a hole 15a into which the reciprocating member 5 can be fitted is formed in the center.A notch hole 15b is formed at a position corresponding to the front of the screw 2 that fixes the base 1, and the screw 2 is inserted from the front. The entire device of the present invention can be attached and detached together with the base 1.

In order to attach box A to temporary frame C using the apparatus of the above embodiment, it is necessary to hold pipe B for introducing wiring connected to connection hole A' of box A, and then attach the temporary frame C built on both sides. Box A is inserted from above between spaces C, the opening side front surface of box A is aligned with a predetermined location of temporary frame C, and at the same time, tensioning device D, which is configured to be expandable and contractible using an air cylinder structure or the like, is attached to support rods D1, etc. The box A is lowered to the position of the box A, and the tensioning device D is interposed between the back surface of the box A and the temporary frame C to tension it, and the box A is tightly fixed to the temporary frame C.

In this state, the rotary operating tool 13 is inserted from the upper end of the pipe B and lowered, and the head 13a or 13b at the tip is fitted into the upper end 1'1a of the shaft 11 located in the connection hole A'. do.

In this case, the heads 13a and 13b at the tip of the rotary operating tool 13
is guided by the pipe B to reliably reach the connecting hole A', so the fitting operation can be easily performed without mistakes.

In particular, if the rotary operating tool 13 is formed of a flexible shaft 13c, even if the pipe B is bent as shown in FIG. It can be reliably fitted to the upper end portion 11a of the shaft 11.

Then, when the shaft 11 is rotated with the rotation operating tool 13,
The rotation is transferred to the rotation transmission member 8 via the bevel gears 12 and 10.
, and the reciprocating member 5, which rotates together with this, rotates.

Therefore, depending on whether the screw shaft 3 and the reciprocating member 5 are screwed together with right-handed screws or left-handed screws, when rotation is applied to the retractable member 5 in the direction of pulling out from the screw shaft 3, the retracting member 5 becomes a rotation transmitting member. It rotates forward according to the lead of the screw shaft 3 while sliding in the axial direction relative to the screw shaft 8.

Then, a wood screw 6 protruding from the center of the front end of the reciprocating member 5 rotates forward from inside the box A and is screwed into the temporary frame C that comes into contact with the front surface of the box.

For example, since the leads of the wood screw 6 and the screw shaft 3 are the same,
The rotational advancing action of the wood screw 6 corresponds to the lead of the wood screw 6 itself, so that the screwed part does not become hollow.

Note that when the wood screw 6 is completely screwed in, the advancing/retracting member 5
is screwed onto the screw shaft 3 at the end.

In this way, the box A is fixed to the temporary frame C by screwing the wood screws 6 to the required length into the temporary frame C.

After fixing, the tensioning of the tensioning device D is released and the tensioning device D is removed.

After concrete pouring is completed and the temporary frame C is removed, the screws 2 fixing the base 1 can be removed from the front opening of the box A, and the entire apparatus can be removed one by one.

It can also be used by setting it in a separate box.

In addition, in the embodiments shown in FIGS. 6 and 7, as a means for imparting rotation to the advancing/retracting member 5 from the outside of the box, it is rotated so that it can rotate along with the outer periphery of the advancing/retracting member 5 and can slide against each other in the axial direction. The transmission member 8 is fitted, a worm gear 16 is formed on the outer periphery of the rotation transmission member 8, and the worm gear 16 is vertically passed through vertically horizontal portions having a substantially U-shaped cross section on the sides thereof, so that the worm gear 16 can freely rotate. Worm shaft 1 held at
The worm shaft 1 is engaged with the worm 18 on top of the worm shaft 1.
The upper end 17a of 7 is formed into a square shaft shape, such as a square or hexagonal shaft, and the upper end 17a projects upward from a hole 19 formed in the box upper plate, and a square hole head provided at the tip of the rotary operating tool 13 is inserted into the upper end 17a. It is configured so that the portion 13a can be fitted.

If the upper end portion 17a of the square shaft shape is tapered,
The fitting operation is easy to perform, and when the device of the present invention is removed after construction, the upper end 1 is removed from the poured concrete.
7a can be easily removed.

In this embodiment, box A is similar to the embodiment described above.
While the is stretched along the predetermined location of the temporary frame C and fixed,
The square hole head 13a of the rotary operating tool 13 is inserted into the box A from above.
The worm shaft 1T is fitted into the upper end portion 17a of the worm shaft 1T projecting upward, and by rotating the worm shaft 17 with the rotation operating tool 13, the rotation transmission member 8 is rotated via the worm 18 and the worm gear 16 that meshes with the worm 18. Along with this, the advancing/retracting member 5 can be rotated, and thereby the advancing/retracting member 5, that is, the wood screw 6 can be rotated and advanced in accordance with the lead of the screw shaft 3, and the wood screw can be rotated as in the previous embodiment. 6 can be screwed into the temporary frame C to fix the box A to the temporary frame C.

In this embodiment as well, the rotation transmitting member 8 is held by the holding plate 15.
Press to prevent it from sliding in the axial direction.

Furthermore, as another embodiment of the rotation imparting means to the advancing/retracting member 5, as shown in FIG. By pulling the rope 20 upward and pulling the rope 20, the rotation transmission member 8 can be rotated in the unwinding direction of the rope 20, and the reciprocating member 5 can be rotated accordingly.

In this case, when installing the box, it is sufficient to pass the wire rope 20 through pipe B for introducing wiring connected to box A and pull it out above temporary frame C. Even if pipe B is bent, The rope 20 can be pulled without any inconvenience, the reciprocating member 5 screwed onto the screw shaft 3 can be rotated forward, and the wood screw 6 protruding from the front end can be reliably screwed into the temporary frame C.

Further, in the case of this embodiment, not only a rotation transmission mechanism using gears, a rotation operating tool, etc. are not required, but also it is not necessary to make the base 1 U-shaped.

Furthermore, the rotation transmission member 8 may be fixed to the advancing/retracting member 5.
It is also possible to wind the wire rope 20 directly around the advancing/retracting member 5, which further simplifies the structure.

As described above, the present invention provides a screw shaft 3 protruding from approximately the center of a base 1 fixed to a box back plate in a box, a reciprocating member 5 screwed onto the screw shaft 3, and a front end of the retracting member 5. A wood screw 6 with the same lead as the screw shaft 3 is protruded from the center, and the advancing/retracting member 5 can be rotated from the outside of the box by an appropriate rotation imparting means. By operating the box from above, which is brought into contact with the temporary frame C, the box can be easily rotated forward according to the screw shaft 3, and the wood screw 6 can be securely screwed into the temporary frame C. Other embedding boxes can be easily and reliably attached to the desired position of the temporary concrete frame.

According to the device of the present invention, the wood screw is rotated and advanced gradually and with a constant force according to the lead of the screw shaft, so that the temporary frame is pushed outward by the advancing action and escapes. Furthermore, there is no fear that the tensioning device or the box will fall off due to temporary release of the tensioning device.

Therefore, wood screws can be reliably screwed into the temporary frame.

Moreover, since it is a rotational operation rather than a percussion operation, mistakes will not occur even when operating from far above.

Furthermore, with the apparatus of the embodiment shown in Figs. 1 to 7, even after the box is once attached to the temporary frame, by rotating the box in the opposite direction, the advancing/retracting member and the wood screw can be rotated back and forth, and removed from the temporary frame. Therefore, the mounting position of the box can be easily changed, which is convenient for installation work.

Furthermore, according to the device of the present invention, the work can be done by one person and is extremely efficient compared to the conventional method that requires two workers, and a large number of installations can be made within a unit of time, reducing electrical work costs. .

Furthermore, after the concrete poured between the temporary frames hardens and the temporary frames are removed, the device of the present invention can be removed from the box together with the base, and can be used as is for installing another box, which is economical.

Further, according to the present invention, there is no need to make large holes in the temporary frame as in the conventional case, so there is an effect that damage to the temporary frame can be reduced.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, and Fig. 1 is a front view of the state set in the box, Fig. 2 is a cross-sectional view taken along line 1 and 2 of the front view, and Fig. 3 is a side view when installed. Fig. 4 is an enlarged vertical sectional side view when the installation is completed, Fig. 5 is a partial sectional view showing another embodiment, and Fig. 6 is a front view showing an embodiment in which the rotation imparting means is different from the above. FIG. 7 is a sectional view taken along the line 1-2 in the previous figure, and FIG. 8 is a longitudinal sectional side view in the case where still another rotation imparting means is used. A...Box, A'...Connection hole, A1...Box back plate,
B... Pipe for introducing wiring, C... Temporary frame, D... Tensioning device,
1...Base, 2...Screw, 3. ．． ．． Screw shaft, 5... Advance/retreat member, 6... Wood screw, 8... Rotation transmission member, 10... Bevel gear, 11
... Shaft, 12... Bevel gear, 13... Rotating operating tool, 15... Holding plate, 16... Worm gear, 17... Worm shaft, 18... Worm, 19... Hole, 20... Wire rope.

Claims (1)

[Claims] 1. In the box, a screw shaft is provided protruding approximately at the center of a base fixed to the box back plate, a reciprocating member is screwed onto the screw shaft, and the screw shaft and the retractable member are screwed together at the center of the front end of the retractable member. A wooden screw with the same lead is provided protrudingly provided, and further provided with a rotation imparting means that can rotate the advancing/retracting member from the outside of the box, so that the advancing/retracting member and the wood screw can be rotated forward according to the screw axis by rotating the advancing/retracting member from outside the box. A device for attaching an embedded box to a temporary concrete frame. 2. As a means for imparting rotation to the advancing/retracting member, a rotation transmitting member is fitted onto the outer periphery of the advancing/retracting member so that the advancing/retracting member can rotate together and can slide relative to each other in the axial direction. The upper end of the shaft is connected to the shaft held in the vertical direction by a power transmission mechanism using gears so that the rotation can be transmitted, and the upper end of the shaft is slightly protruded outside the box so that the head of the rotary operating tool can be secured to this. An apparatus for attaching an embedded box to a temporary concrete frame according to claim 1. 3. The device for attaching an embedded box to a temporary concrete frame as set forth in claim 2, wherein the power transmission mechanism includes a bevel gear on the outer periphery of the rotation transmission member and a bevel gear on a shaft that meshes with the bevel gear. 4. The device for attaching an embedded box to a temporary frame for a concrete IJ as set forth in claim 2, wherein the power transmission mechanism includes a worm gear on the outer periphery of the rotation transmission member and a worm on a shaft that meshes with the worm gear. 5. The device for attaching an embedded box to a temporary concrete frame according to claim 2, wherein the upper end of the shaft is located at the center of the pipe connection hole in the box upper plate. 6. As a means for imparting rotation to the advancing/retracting member, a wire rope is wound several times around the outer periphery of the rotation transmitting member or the advancing/retracting member that is fitted to the advancing/retracting member so that it can rotate together with the advancing/retracting member, and the wire rope is pulled out above the box. 2. A device for attaching an embedded box to a temporary concrete frame according to claim 1, wherein the moving member can be rotated by traction.