JPH09317171A - Pressing method of concrete embedded structure onto form and pressing tool therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the workability, by fitting a pressing tool provided with a projection which is freely rotatable to the rear face direction of a concrete embedded structure and sticking the projection on one form by turning it to press the embedded structure to the other form by the reactive force. SOLUTION: A pressing tool 1 is constituted of a fitting part 2 with a L- shaped section, a projection 3 rotatably fitted to the fitting part 2, around the axis at one end, and a pulling-up rope 4 connected to the projection 3. A retaining board 22 provided with a support bar 21 at the rear face of a wiring box 11 and the flange 5 of the pressing toot 1 are integrally fixed with fitting bolts. Then, the support bars are bent to fix to reinforcements 31 and temporarily hold the wiring box 11. Forms 32, 33 are erected and the pulling-up 4 rope is pulled to fit the projection 3 of the pressing tool 1 to the rear face of the wiring box 11. The projection is turned to stick the rotary roller 10 to one form 32 and the wiring box 11 is fixed with pressure to the other form 33 at the opening by means of the reactive force. Accordingly, the working period necessary for the fixing works can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for pressing a concrete buried object such as a box for accommodating wiring equipment such as a switch and an outlet against a mold during concrete pouring, and a method for pressing the concrete buried object into the mold. It is about ingredients.

[0002]

2. Description of the Related Art Conventionally, in the construction work of a building, in order to fix a concrete buried object of this kind in a formwork at the time of pouring concrete, the work was carried out by the procedure shown in FIGS. First, as shown in FIG. 8, a supporting bar member 21 that can be freely bent and can be pressed is attached to a holding plate 22.
Wiring box 11 which is a concrete buried object
To the back of the. Next, referring to FIG.
Is laid on the reinforcing bar 31 using a binding band 34 to temporarily fix the wiring box 11. Then, in FIG.
After the mold 32 and the mold 33 are erected, the position of the wiring box 11 is detected from the front side of the mold 33 using a detector or the like, a through hole is bored, and the stat bolt 36 is inserted. , The back surface of the wiring box 11 is pulled and fixed to the form 33. In this state, concrete is poured and solidified, and then the stat bolt 36 is first removed in FIG.
3 is removed. As a result, the wiring box 11 is buried in concrete.

[0003]

However, since the installation work of the wiring box 11 is performed by the electric contractor during the building period, the stat bolt 36 before the removal of the form 33 after the concrete is placed is removed. Because of this, he had to go to the site again at a later date, which required work days, which was troublesome and uneconomical. Further, after the mold is erected, the position of the wiring box 11 is detected from the front side of the mold 33, and a through hole is formed, and the stat bolt 36 is screwed to the rear surface of the wiring box 11 through the through hole. They had to meet each other, and the work was troublesome and difficult. Further, since a through hole for inserting a stat bolt is provided in the mold, it is uneconomical in that it requires a hole filling operation for the next use and a renewal of the mold.

Therefore, the present invention provides a method for pressing concrete embedding into a mold and a pressing tool for the same, which can reduce the number of working days, improve workability, and press and hold the mold easily and economically. Is an issue.

[0005]

According to a first aspect of the present invention, there is provided a method for pressing a concrete buried object against a formwork, which comprises a pressing tool having a projecting portion rotatable in the rear direction of the concrete buried object. After that, the projecting portion is rotated to project it to one of the molds, and the reaction force presses the concrete-embedded object so as to be in close contact with the other mold.

According to a second aspect of the present invention, there is provided a pressing member for a concrete buried object, wherein the concrete buried object is attached to the concrete buried object, and the projecting member is rotatably attached to the fitting portion so as to project toward the back of the concrete buried object. Part and an operation part for rotating the projecting part to project it to the other mold, and the other end of the projecting part presses the concrete buried object against one mold by a reaction force. It rotates and thrusts to the other formwork.

According to a third aspect of the present invention, there is provided a pressing tool for a concrete embedded object, wherein the pressing tool according to the second aspect prevents the protruding portion from rotating beyond the protruding position with respect to the form. It has a rotation preventing portion.

According to a fourth aspect of the present invention, in a concrete embedded object pressing tool, the operating portion according to the second or third aspect is a pulling rope connected to the protruding portion.

According to a fifth aspect of the present invention, in a concrete embedded object pressing tool, the projecting portion according to any one of the second to fourth aspects has a rotating roller at its tip.

According to a sixth aspect of the present invention, in a concrete embedded object pressing tool, the rotating roller according to the fifth aspect has a projection on the outer periphery which bites into the mold.

According to a seventh aspect of the present invention, there is provided a pressing tool for a concrete embedded object, wherein the pressing tool according to any one of the second to sixth aspects is provided with a support bar member attached to a wall stirrup. .

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the figure, a pressing tool 1 includes a mounting portion 2 having an L-shaped cross section and the mounting portion 2
A protrusion 3 rotatably attached to one end of the
The pulling rope 4 is connected to the projecting portion 3 and corresponds to the operating portion of the claims.

The flange 5 on one side of the mounting portion 2 has a wiring box 11 whose front surface is opened via mounting bolts 23.
A holding plate 22 is interposed between the flange 5 and the wiring box 11, and the holding plate 22 is installed between the reinforcing bars 31 shown in FIG. A support bar member 21 made of a round bar having a tensile elasticity is attached. A protruding plate portion 6, which is the other side surface of the attachment portion 2, has one end of the protruding portion 3 attached via a shaft 7 so as to be vertically rotatable. A stopper 6a, which is a rotation preventing portion according to claim 3, is bent and formed at the upper end of the tip portion of the projecting plate portion 6, and the pulling force when pulling the pulling rope 4 upward or the time when concrete is poured is used. The projecting portion 3 is prevented from moving upward beyond the horizontal position by the concrete inflow pressure. The engagement protrusion 6b is forcibly engaged with the engagement hole 8 when the protrusion 3 is rotated to a substantially horizontal position to maintain the position stability in the protrusion state. The stopper 6c is formed in terms of rotational stability of the protrusion 3 in the vertical state, but it may be omitted.

A rotating roller 10 is rotatably attached to the free end side of the protruding portion 3 via a shaft 9, and the entire outer periphery of the rotating roller 10 is protruded into one of the molds 32 in a biting state. The protrusion 10a is provided. In addition, the pressing tool 1 has a wall length, that is, two mold frames 32 and 3 in the projecting state.
It is adjusted in advance so that the distance is substantially the same as the distance between the three.

Next, a method of fixing the wiring box by using the pressing tool of this embodiment having the above-described structure will be described with reference to FIGS. 2 to 4. First, as shown in FIG.
On the back surface of the wiring box 11, a holding plate 22 having a support bar member 21 and a flange 5 of the pressing tool 1 are attached with a mounting bolt 23.
Use to fix together. At this time, the horizontal projection length of the pressing tool 1 can be finely adjusted by interposing a washer, a spacer, or the like between the flange 5 and the holding plate 22. At this stage, the protrusion 3 of the pressing tool 1 is in a suspended state.

Next, the support bar member 21 is appropriately bent, and the binding band 34 is used to bridge the reinforcing bar 31 to temporarily hold the wiring box 11 at a predetermined position. At this time, the pulling rope 4 is held above the reinforcing bar 31. Then formwork 3
2 and the form 33 are erected, and the state shown in FIG. 4 is obtained. Next, the pulling rope 4 is pulled from above the mold to rotate the projecting portion 3 of the pressing tool 1 so as to project toward the back of the wiring box 11, and the rotary roller 10 is projected to one mold 32. To stretch. At this time, since the rotating roller 10 rolls on the surface of the mold 32, the pressing tool 1 can be smoothly pushed. In this way, when the state shown in FIG. 3 is reached, since the pressing tool 1 pushes one of the molds 32, the wiring box 11 is pressed against and fixed to the other mold 33 at its opening by its reaction force. To be done.

After the wiring box 11 is fixed in this way, concrete is poured. At this time, the protruding portion 3 is prevented from further moving upward by the stopper 6a, so that the protruding portion 3 is not folded upward by the inflow pressure at the time of pouring concrete. After the concrete is solidified, the wiring box 11 is simply stretched and held by the mold 33, so that the mold 33 can be easily removed as it is.

As described above, the method of pressing the concrete-embedded object to the formwork of this embodiment has the projecting portion 3 which is rotatable about the one end in the back direction of the wiring box 11 which is the concrete-embedded object. After the pressing tool 1 is attached to the wiring box 11, the projecting portion 3 is rotated to stretch it on one of the molds 32, and the reaction force causes the wiring box 11 to closely contact the other mold 33. It is pressed so as to cause it.

Therefore, the wiring box 11 has the form 3
Since it is simply squeezed and fixed to 3, the form 33 can be immediately removed as it is, and by firmly fixing the wiring box to the form using a stat bolt as in the conventional case, After an electrician puts concrete,
There is no need to go to the site again at a later date to remove the stat bolt before removing the formwork, and the electric contractor will not forget to remove it at a later date. As a result, the number of working days is shortened, work is facilitated, and the economy is improved.
Further, since the pressing tool 1 is used to push and hold the wiring box 11, the wiring box 11 can be easily fixed. And the through hole is formed, and the stat bolt 36 has to be screwed into the rear surface of the wiring box 11 through the through hole. Further, since it is not necessary to provide a through hole for inserting the stat bolt in the mold 33, the mold can be repeatedly used, which is economical.

In this embodiment, since the engaging projection 6b of the projecting plate 6 engages with the engaging hole 8 of the projecting portion 3 in the projecting state, it can be held at a constant horizontal position. Furthermore, since the protrusion 10a is provided on the outer periphery of the rotating roller 10,
Since the tip of the tip comes into pressure contact with the form 32 in a biting state, the bulging state is also stabilized by this. Then, since the protruding portion 3 of the pressing tool 1 can be rotated upward by using the pulling rope 4, it is possible to rotate the protruding portion 3 of the pressing tool 1 without inserting an arm between narrow molds.
It is possible to rotate the upper part of the mold with a simple means. In addition, since the reinforcing bar 31 is temporarily held by the supporting bar member 21, the bending of the supporting bar member 21 and the elastic elasticity allow the wiring to be easily separated at a desired height from the reinforcing bar 31 by a predetermined length. The storage box 11 can be temporarily held.

In the above embodiment, the supporting bar member 21 is used to temporarily hold the reinforcing bar 31, but the holding method is not limited to this. For example, as shown in FIG. It may be hung on or hooked to. Further, as shown in FIG. 6, a flange 11a having a mounting hole may be provided on the upper portion of the wiring box 11, and the flange 11a may be hooked on the nail 35 previously mounted on the form 33. Further, as shown in FIG. 7, a flange 11b may be provided on the peripheral edge of the front surface of the wiring box 11, and the surface may be held by the form 33 by adhering this surface with an adhesive force that can be easily separated later. . In short, if it can be temporarily held, it may be appropriately selected and attached from various attachment means.

Further, in the above-mentioned embodiment, the projecting portion 3 is adapted to rotate upward using the pulling rope 4 and project the projecting frame 32, but the present invention is not limited to this. , The protruding portion 3 is initially standing upward, and when the protruding portion 3 is rotated downward to the horizontal position to make the protruding portion, an operation rod or the like is inserted from above the formwork and the protruding portion 3 is pressed downward. It can also be rotated.

Further, in the above-mentioned embodiment, the protruding portion 3 is rotated in the vertical direction, but it is assumed that the protruding portion 3 is rotated in the horizontal direction or the oblique direction, and the protruding portion 3 is protruded from the side or the oblique direction between the molds. The part 3 may be operated. In short, formwork 3
It suffices as long as it is possible to make the bulge portion 3 bulge into 2.

Then, the protrusion 3 is provided with a stopper 6a for preventing rotation, and the rotary roller 10 is attached to the free end.
Although the protrusion 10a is formed on the outer circumference of the rotating roller 10, it is not always required and may be appropriately selected and used.

[0025]

As described above, according to the first aspect of the present invention, there is provided a method of pressing a concrete-embedded object into a formwork, in which the pressing tool having a projecting portion rotatable in the rear direction of the concrete-embedded object is used. After that, the projecting portion is rotated to project it to one of the molds, and the reaction force presses the concrete-embedded object so as to be in close contact with the other mold. Therefore, since the concrete buried object is simply stretched and fixed to the formwork, the formwork can be immediately removed, and it is not necessary to go to the site again after placing the concrete, so the number of working days can be shortened, Work is easy and economical. Further, since it is held by pushing with a pressing tool, it is easy to fix the concrete embedded object, and as in the conventional case, after standing the formwork, detect the position of the box from the front side of the formwork, and, There is no need for the troublesome work of forming a through hole and screwing the stat bolt to the back surface of the box through the through hole. Furthermore, since it is not necessary to provide a through hole for inserting the stat bolt in the form,
It is economical because the formwork can be used repeatedly.

According to a second aspect of the present invention, there is provided a pressing member for a concrete buried object, wherein the concrete buried object is attached to the concrete buried object, and the projecting portion is rotatably attached to the fitting portion so as to project toward the back of the concrete buried object. And an operating portion for rotating the projecting portion to project it to the other mold, and the other end of the projecting portion is rotated so as to press the concrete buried object against one mold by a reaction force. It moves and pushes into the other formwork.
Therefore, the same effect as that of claim 1 can be expected.

According to a third aspect of the present invention, there is provided a pressing tool for a concrete buried object, wherein the pressing tool according to the second aspect prevents the projecting portion from rotating beyond a projecting position with respect to the mold. Since it has the movement preventing portion, it is possible to prevent the protruding portion from being folded upward due to the inflow pressure at the time of placing concrete.

According to a fourth aspect of the present invention, in the concrete embedded object pressing tool, the operating portion according to the second or third aspect is configured by a pulling rope connected to the projecting portion. In particular, it is not necessary to insert an arm between narrow molds to perform a rotating operation, and the operation can be performed from above the mold with a simple means.

According to a fifth aspect of the present invention, there is provided a concrete embedded object pressing tool, in which the projecting portion according to any one of the second to fourth aspects has a rotating roller at its tip. It is possible to smoothly push the pressing tool onto the mold.

According to the sixth aspect of the present invention, in the concrete embedded object pressing tool, the rotating roller according to the fifth aspect has a protrusion on the outer periphery which bites into the mold, so that the tip of the rotary roller particularly forms the mold. Since the pressure contact is made in the bite state, the protruding state can be further stabilized.

According to a seventh aspect of the present invention, there is provided a pressing tool for a concrete buried object, wherein the pressing tool according to any one of the second to sixth aspects is provided with a support bar member attached to a wall streak. Therefore, in particular, the concrete buried object can be easily temporarily held at a predetermined position.

[Brief description of drawings]

FIG. 1 is a perspective view of a pressing tool according to the present invention as viewed obliquely from below.

FIG. 2 is a side view showing a state before the projecting to the formwork in the fixing operation of the concrete buried object according to the present invention.

FIG. 3 is a side view showing a state after the projecting to the formwork in the fixing operation of the concrete buried object according to the present invention.

FIG. 4 is a side view showing a method for temporarily holding a concrete buried object according to the present invention.

FIG. 5 is a side view showing another method for temporarily holding a concrete buried object according to the present invention.

FIG. 6 is a side view showing still another temporary holding method for the concrete buried object according to the present invention.

FIG. 7 is a side view showing still another temporary holding method for the concrete buried object according to the present invention.

FIG. 8 is a perspective view showing a state in which a support bar member is attached to a concrete buried object.

FIG. 9 is a perspective view showing a state in which a concrete buried object is temporarily held by a reinforcing bar via a support bar member.

FIG. 10 is a vertical cross-sectional view showing a conventional method for fixing a concrete buried object to a formwork.

FIG. 11 is a perspective view showing a state in which a stat bolt is removed after placing concrete in a conventional method of fixing an embedded concrete object to a formwork.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pressing tool 2 Mounting part 3 Protrusion part 4 Pulling rope 6a Stopper 10 Rotating roller 10a Projection 11 Wiring box 21 Support bar material 32, 33 Formwork

Claims (7)

[Claims] 1. After attaching a pressing tool having a projecting portion rotatable in the back direction of the concrete buried object to the concrete buried object, the projecting portion is rotated to stretch it into one of the molds, A method for pressing a concrete buried object against a mold, wherein the concrete buried object is pressed by the reaction force so as to be in close contact with the other mold. 2. A mounting portion to a concrete buried object and a rotatably mounted to the mounting portion so as to project in the rear direction of the concrete buried object, and the other end of the concrete buried object to one mold by a reaction force. Concrete embedding, comprising: a projecting portion that pivots to press against the other formwork and a manipulating portion that pivots the projecting part to push the other formwork. An object pressing tool. 3. The pressing tool for a concrete embedded object according to claim 2, further comprising a rotation preventing portion that prevents the protrusion from rotating beyond the protrusion position with respect to the mold. . 4. The pressing tool for a concrete buried object according to claim 2, wherein the operation portion is formed of a pulling rope connected to the protruding portion. 5. The protruding portion has a rotating roller at a tip thereof, according to any one of claims 2 to 4.
Item 3. A pressing tool for a concrete buried object according to the item. 6. The concrete embedded object pressing tool according to claim 5, wherein the rotary roller has a protrusion on its outer periphery, which protrusion bites into the mold. 7. The pressing tool for a concrete embedded object according to claim 2, further comprising a support bar member attached to a wall streak.