JPH0134752B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for attaching a buried object buried in concrete to a position of a temporary concrete frame that is out of reach.

In concrete buildings, buried objects such as outlet boxes or switch boxes for electrical wiring are buried. Generally, these buried objects are buried by installing a temporary concrete frame on both sides of the temporary concrete frame, and then pouring ready-mixed concrete into the temporary frame. Currently, construction workers who assemble temporary frames and pour fresh concrete are generally separated from electrical workers who install buried objects such as outlet boxes. This is due to the fact that the workers have to work in between the work of the construction workers. Therefore, temporary frames are usually placed side by side at fairly narrow intervals, making it impossible for people to enter and work on them.
Moreover, the installation locations of buried objects such as outlet boxes are far away from the reach of humans, and cannot be installed using normal methods.

Therefore, the electrical worker had no choice but to penetrate the concrete temporary frame constructed by a different construction worker each time, and insert the hook bolt into the through hole from the outside of the temporary frame where it is easier to work. A method was used in which the outlet box was lowered from the side, a hook bolt provided on the outlet box was engaged with a hook bolt, and then the hook bolt was tightened from the outside of the temporary frame. However, this method causes a lot of damage to the temporary frame due to the holes being drilled, and requires at least two workers: one to insert the hook bolts from the outside, and the other to climb onto the top of the high temporary frame and lower the outlet box from there. It becomes necessary. Furthermore,
The person inserting the hook bolt cannot see the outlet box because it is obstructed by the temporary frame, and therefore has no choice but to call out to each other without seeing the outlet box, which is extremely inefficient. Ta.

The purpose of the method of the present invention is to eliminate the above-mentioned drawbacks and to efficiently install a buried object such as an outlet box in a location far out of reach with a small number of workers.

Recently, as shown in Figs. 1 and 2, a method of installing an outlet box far away is to fix a base 2 in a box 1 which is a buried body, and to attach a screw shaft 3 protruding from the base 2. A method has been proposed that uses a device in which a reciprocating member 4 is screwed onto a shaft 3 and a wood screw 5 is provided protruding from the retracting member 4. This is a method using a device according to Japanese Patent Application Laid-Open No. 55-86317. This one has box 1 and tension device 6.
By rotating the reciprocating member 4 in a fixed state, the wood screws 5 are screwed into the temporary frame 7, and the box 1 and the wood screws 5 are integrally attached to the temporary frame 7 at the same time. In the case of this method,
As is clear from the statement on page 12, lines 6 to 8 of the specification at the time of publication of -86317, the reciprocating member 4 and the screw shaft 3 must always be screwed together, and therefore are buried objects. It is absolutely impossible to attach the box 1 and the wood screws 5 separately; it is always possible to attach the box 1 and the wood screws 5 integrally at the same time. Therefore, a large number of various parts such as the screw shaft 3 reciprocating member 4 base 2, etc., which are the device, have to be directly assembled into the box 1 itself, which is the buried body, which is extremely inefficient. Furthermore, only buried objects of extremely limited size and shape, i.e., box-shaped objects, that have space for storing various parts can be used, and buried objects of a size and shape that cannot accommodate the above-mentioned parts, i.e., pipe-like objects, can be used. It cannot be used for buried objects in the form of plates or plates, and has poor versatility. Also, since the wiring is done inside Box 1, it is necessary to empty Box 1 after burying it.
Therefore, as is clear from the statement on page 12, lines 13 to 18 of the specification at the time of publication of No. 55-86317, after the temporary frame 7 was removed, the electrical worker went to the work site again and carried out the work of the construction worker. All the parts had to be removed from Box 1 during the cleaning period, resulting in a decrease in cleaning efficiency. It is also an object of the method of the present invention to overcome the problems of lack of versatility and reduced efficiency that occur when using the apparatus of JP-A-55-86317.

The method according to the present invention is intended for mounting a buried object at a mounting location that is far out of reach of humans. That is, the method according to the present invention provides a rotary drive shaft that can reach a distant installation position, changes the direction of this rotation to a direction that intersects the longitudinal direction of the rotary drive shaft, and thereby advances the screw into the concrete temporary frame. It is characterized in that it is installed with a predetermined length exposed, and after the screw is installed, the locking tool of the buried body is hooked on the exposed portion of the screw. That is, the method according to the present invention is a method for installing a buried object such as an outlet box or a switch box in a position far away from human reach, and the method involves changing the direction of the rotary drive shaft to the forward direction of the rotary screw. This causes the screw to be installed in the concrete temporary frame with a predetermined length exposed, and then the exposed part of the screw is hooked with the locking tool of the buried object to be buried in the concrete, and the buried object is installed. It is what attaches the body. In this way, the structure is such that the screw is first attached and then the locking tool for the buried object is hooked, unlike the invention of JP-A No. 55-86317, in which the screw and the buried object are attached at the same time. There is no need to directly incorporate many parts such as the screw shaft 3, reciprocating member 4, base 2, etc. into the buried body itself, and of course there is no need to remove the above parts and empty them after removing the temporary frame 7. Work efficiency is good. Furthermore, since there is no need to directly incorporate various parts into the buried body itself, there are no restrictions on the size and shape of the buried body, and therefore the buried body may be in the shape of a pipe or a plate, making it highly versatile.

Hereinafter, the above-described attachment method will be explained in more detail with reference to the drawings. First, for convenience of explanation, the screw mounting device and screw used in the mounting method according to the present invention will be explained in (), and then the mounting method according to the present invention will be explained in ().

() First, the third section showing the side view of the entire screw mounting device.
In the figure, 11 is a rotational drive shaft. 12 is a long operation box in which the rotary drive shaft 11 is housed;
A scale portion 13 for detecting the screw mounting height position is provided on the peripheral wall. 14 is a box provided at the lower end of the operation box 12. FIG. 4 is a perspective view of this, and FIG. 5 is a front view.

Further, FIGS. 6 and 7 show the inside of the box body 14, and as is clear from these figures, the rotary drive shaft 11 has a worm 15 at its lower end. Reference numeral 16 denotes a worm wheel for changing the direction of rotation of the rotary drive shaft 11 to the forward direction of the screw, and the worm wheel 16 is engaged with the worm 15 so as to be rotated by the rotary drive shaft 11. In Fig. 8, reference numeral 17 is a screw for attaching the buried body, which includes a head 17a, a threaded portion 17d, and a stopper 1.
7c and a locking portion 17b. In this embodiment, the head 17a of the screw 17 has a hexagonal shape, and the locking portion 17b has a tapered shape in which the diameter gradually decreases from 17a. In this example, the stopper 17c is shaped like a flange, but the stopper 17c is not limited to this and may be shaped like a mere protrusion. This is because the stopper is for attaching the screw 17 in an exposed state. Now, in FIGS. 6 and 7, reference numeral 18 denotes a screw fixing part attached to one side of the worm wheel 16 with a bolt 19.
It is designed to rotate by the same half rotation. In this embodiment, the screw fixing portion 18 has a hexagonal hole 20.
It has in the center. 21 is worm foil 1
This is a magnet provided in the center of the hole 20 facing the hole 20. Then, the screw 17 is inserted into the hole 20 from the head 17a side of the screw 17, and the hexagonal head 17a and the hexagonal hole 20 are fitted into the hole 20, and the screw 17 is inserted into the hole 20.
and the screw fixing part 18 are made to rotate together. At this time, if the screw head 17a is made of a magnetic material such as iron ore, the screw head 17a will be attracted to the magnet 21 and can be prevented from coming off. When the screw 17 is fixed to the screw fixing portion 18 in this manner, the screw head 17a is only fitted into the hole 20 in an uneven manner, so that the screw 17 can be removed. It can be said.

When the rotary drive shaft 11 is rotated with the screw 17 fixed as described above, this rotation is decelerated and direction-changed through the worm 15 and the worm wheel 16, and the fixed screw 1
7, and therefore the screw 17 rotates. Therefore, if the exposed tip portion of the screw 17 is bitten into the temporary frame, the screw 17 will move forward in the direction of arrow A shown in FIG. 6 as the screw 17 rotates. Here, the worm wheel 16 functions to convert the rotation of the rotary drive shaft 11 into the forward rotational direction of the screw 17.

() Now that we have finished explaining the screw mounting device, we will explain how to remotely install a buried object in Figures 9 to 12 below.
This will be explained in detail with reference to the drawings. (In this case, unlike the one shown in FIG. 3, a cover 23 is attached.) First, as shown in FIG. 9, the entire screw mounting device M is lowered from the upper end side of the temporary frame 24. At this time, if the height position is detected by the scale part 13 through the expansion and contraction of the operation box 12 and the cover 23, it is convenient to avoid making mistakes in the mounting height position of the screw 17. Also, at this time, use the spirit level 22 to check the device M.
Check to see if it is tilted. Once the device M is in the normal position, by pressing the device M in the direction of arrow C as shown in FIG. Let it sink into you. And the first
A hand-held electric drill 25 or the like as shown in FIG. 1 is set on the upper end of the rotary drive shaft 11 and driven. Of course, it may be driven by other means than the hand-held electric drill. As a result of such driving, the screw 17 automatically threads into the temporary frame 24 by self-tapping, and the screw 17 advances until the stopper 17c comes into contact with the surface of the temporary frame 24. Since the screw according to the present invention is provided with a stopper 17c as shown in FIG. 8, the screw 17 has the effect of preventing further screwing. Therefore, as shown in FIG. 12, the screw 17 can be reliably installed with a predetermined length exposed.

The method of attaching the screws 17 is not limited to the method shown in FIG. 9, but may be carried out by providing a bridge 26 for holding the screw attaching device M between the temporary frames 24, as shown in FIGS. 10 and 11. . In this case, frame 26
With the height adjusted by inserting the screw 26e in a into the desired position of the device M, move the upper end of the device M in the direction of arrow D as shown in FIG. A pendulum movement is made in the direction of arrow E, and the pendulum movement causes the tip of the screw 17 to bite into the temporary frame 24.

Now, once the screws 17 are exposed for a predetermined length and have been installed in a remote location of the temporary concrete frame 24 that is out of reach of humans, it is time to install the outlet as shown in Figure 12. The buried object 27, such as a box, is lowered from the upper end of the temporary frame 24, and the buried object locking tool 28 is hooked onto the exposed portion of the screw 17, especially the locking portion 17b, thereby keeping the buried object 27 out of reach of people. It is installed at a location that is quite far away. In this sense, the locking portion 17b can be said to correspond to the buried object locking tool 28.

Unlike the prior art, the present invention does not require a person to insert the hook bolt from the outside of the temporary frame, and only requires a person at the end of the temporary frame, which has the effect that the buried object can be installed with fewer people. As described above, in the installation method according to the present invention, after the screw 17 is installed, the buried object 27 is hooked to the screw 17, so that the device described in Japanese Patent Application Laid-Open No. 55-86317 can be used. Unlike the method of using the device, various parts such as the screw shaft 3 reciprocating member 4 base 2 etc. are buried in the buried body 27.
There is no need to directly incorporate the device into the device itself, so it has the advantage of being able to be installed regardless of the size and shape of the buried object. Of course, unlike the method using the apparatus described in Japanese Patent Application Laid-Open No. 55-86317, it requires a much more troublesome process of directly assembling the various parts mentioned above into the buried body itself, and furthermore, it requires the process of directly assembling the various parts mentioned above into the buried body itself. There is no very troublesome process of removing and emptying the buried body, and it is more efficient than the method disclosed in Japanese Patent Application Laid-Open No. 86317/1983.

In addition, in the case of the embodiment shown in the drawings, the buried body 27 such as an outlet is attached to the screw 17 by attaching a separate locking tool 28 to the buried body 27 as shown in FIG. The operator is holding the top end side while doing this. For reference, examples of the separate locking tool 28 attached to the buried object are shown in FIGS. 13 to 16.
Shown in the figure. In this case, 30 is a cut and raised piece for attaching the buried object, 31 is a locking hole, 32 is a bent piece, and 33 is a sloped part for guiding the locking. You may also apply adhesive tape for attaching buried objects. Even in the attached state, the bending piece 32 is tightened by the screw 1 due to its spring action, as shown in FIG. 14.
7 is crimped onto the tapered portion of the locking portion 17b, whereby the buried object 27 and the locking tool 28 are securely stopped so that they do not move.

In this example, a locking tool 28 separate from the buried object 27 is attached to the buried object 27, but instead of this, the locking tool and the buried object can be integrated as shown in FIG. Of course, it is also possible to create one. Further, in this example, the head 17a of the screw 17 has a hexagonal shape, but instead of this, the head 37 of the screw 37 has a stopper 37c as shown in FIG.
a may be used for gears, in this case, the 17th
Due to the gear mesh structure shown in the figure, the rotational driving force of the spur gear 36 can be reliably transmitted. or,
It goes without saying that the screw may be as shown in FIG. 19, where 38 is resin for insert molding or inserting later to form a taper. The screw head may have a square shape as shown in Figure 20, or may have a hexagonal hole in the center (in this case, a hexagonal protrusion is provided on the screw fixing part to fit the concave and convex portion), or it may be made of a spline, etc. It's okay.

[Brief explanation of drawings]

FIGS. 1 and 2 are a side view and a vertical side view showing enlarged main parts for explaining the conventional device. 3 to 21 show examples to which the present invention is specifically applied. Fig. 3 is a side view of the entire screw installation device, Fig. 4 is an enlarged perspective view of the main parts of the device, Fig. 5 is an enlarged front view of the main parts of the device, Fig. 6 is a cross-sectional plan view of the main parts of the installation, and Fig. 7 The figure shows No. 5 with the lid removed.
Fig. 8 is a perspective view of the screw, Fig. 9 is a side view showing how to install the screw, Fig. 10 and 11 are equivalent views of the figure.
The figures are a side view and an enlarged perspective view showing different methods of attaching the screw, Fig. 12 is a side view showing a state in which an embedded body is attached to the exposed part of the screw, Figs. 13A and B are explanatory views of the locking tool, FIG. 14 is an explanatory diagram of the function of the bent piece, and FIGS. 15A and 15B and FIGS. 16A and B are explanatory diagrams of different locking devices. FIG. 17 is a cross-sectional plan view of a different device, FIG. 18 is a perspective view of a screw with a gear-shaped head, FIGS. 19A to D are side views of other examples of screws, and FIG. It is a perspective view of the screw head of the example. FIG. 21 is a perspective view of the buried body integrally provided with the locking tool. In the figure, 11 is a rotary drive shaft, 16 is a worm wheel, 17 is a threaded part, 17a is a head, 17b is a locking part, 17c is a stopper, 17d is a threaded part, 24 is a temporary concrete frame, and 27 is an outlet box. etc., and 28 indicates a locking tool, respectively.

Claims (1)

[Claims] 1 By changing the direction of the rotation of the rotary drive shaft and transmitting the rotation to the forward direction of the screw, the screw is installed in the concrete temporary frame with a predetermined length exposed, and then the screw is installed in the buried object buried in the concrete. A method for remotely attaching a buried object to a temporary concrete frame, characterized by hooking a locking tool provided integrally or separately onto an exposed portion of a screw.