JP2022057960A - Construction method of through hole in concrete placing, and cylindrical member usable in through hole formation - Google Patents

Abstract

To fix a mold frame for through hole formation to a temporary frame without fixed to reinforcement bars at the time of through hole formation in concrete placing.SOLUTION: Plugs 40 and 20 are installed in both ends 100T1 and 100T2 of a mold frame 100 that is a through frame material, an end 60T2 of a bolt 60 is engaged with the plug 20 and is inserted into the mold frame 100, and is protruded from the plug 40. A nut 66 is fastened to a first temporary frame F1 on the side of an end 60 T1 of the bolt 60, and the mold frame 100 is positioned and fixed to the first temporary frame F1. When a secondary temporary frame F2 is installed, the plug 20 is screwed and connected from the surface side of the secondary temporary frame F2. After concrete placing, the first and second temporary frames F1 and F2 are removed while the plugs 40 and 20 are mounted.SELECTED DRAWING: Figure 5

Description

The present invention relates to the construction of forming through holes for pipe installation and wiring in concrete wall materials, beams, slabs, etc. in construction work for placing concrete, and particularly for formwork such as sleeves and pipes. Regarding the installation of through frame materials.

Generally, in a concrete building structure, a formwork such as a sleeve or a tubular through frame material such as a pipe is used in order to bury exhaust, water distribution, ventilation pipes or the like in concrete or to form a wiring passage. For example, before placing concrete, a plate-shaped temporary frame (form) is installed in the vertical direction or the horizontal direction, and pipes and the like are fixed between the temporary frames. After placing the concrete, remove the temporary frame and connect the pipes installed inside the concrete to the external pipes.

It is necessary to position the sleeve at a predetermined position in the temporary frame in order to prevent the sleeve and the like from fluctuating when placing concrete. For example, a sleeve holder having a C-shaped cross section is attached to a reinforcing bar arranged in the temporary frame, and the sleeve is attached to the holder (see Patent Document 1).

Further, there is also known a construction method in which two temporary frames are installed first so as to face each other, and pipes and the like are fixed while being moved between the temporary frames (see Patent Document 2). There, plugs with bolts and springs inside are installed at both ends of the pipe, and the pipe is moved up and down between the temporary frames facing each other. When the hole provided at the fixed position of the temporary frame is reached, the end of the bolt urged by the spring protrudes through the hole of the temporary frame, whereby the pipe is positioned.

Japanese Unexamined Patent Publication No. 2010-248883 Japanese Patent No. 3642525

When installing a sleeve or the like in a place away from the place where the reinforcing bar is arranged or in a place where the space is narrow, fixing using the sleeve holder is difficult. In particular, it is difficult to install the temporary frame in a place near the base where the temporary frame is installed or in a place deep from the scaffolding of the worker. Further, depending on the complicated arrangement state of the reinforcing bars, the formwork such as the sleeve and the piping cannot be moved between the temporary frames.

Therefore, when forming a through hole in concrete casting, it is required that the formwork for forming the through hole can be easily fixed to the temporary frame.

A method of constructing a through hole, which is one aspect of the present invention, includes a step of installing a first temporary frame and a rod-shaped member at at least one end of a tubular formwork or a pipe away from the first temporary frame. The process of installing a tubular member that is engageable and is in contact with the end and / or inner surfaces of the formwork or pipe, and one end of the rod-shaped member is engaged with the tubular member to engage the formwork or pipe. Including the process of passing through. Either the rod-shaped member may be passed through the pipe or the cylindrical member may be engaged with the rod-shaped member first. Then, the step of fixing the rod-shaped member to the first temporary frame is included so that the cylindrical member exerts a force along the axial direction on the formwork or the pipe toward the first temporary frame. Fixing to the first frame may be performed at or near the other end of the rod-shaped member. Further, the formwork or the pipe may be fixed so as to receive a force from both sides of the first temporary frame and the second temporary frame, or the formwork or the pipe may be pulled by the rod-shaped member. It may be pressed against the temporary frame side of 1.

Further, in the method of constructing the through hole of the present invention, the step of installing the second temporary frame according to the position of the formwork or the pipe fixed to the first temporary frame, and the tubular member are provided in the second. The process of connecting to the temporary frame, the process of releasing the fixing of the rod-shaped member to the first temporary frame after placing the concrete, and the process of removing the second temporary frame with the tubular member connected. include. Any connecting method is applied to the step of connecting the tubular member to the second temporary frame, and any connection method may be used as long as the tubular member can be removed together when the second temporary frame is removed.

A method of constructing a through hole, which is one aspect of the present invention, is a step of installing a first temporary frame and a formwork or a pipe at at least one end of the formwork or a pipe away from the first temporary frame. In the process of installing a tubular member that can contact the end face and / or the inner surface, one end of the rod-shaped member is engaged with the tubular member and passed through the formwork or pipe, and the rod-shaped member is passed through the other. It includes a step of fixing the formwork or piping to the first temporary frame by fixing it to the first temporary frame at the end.

The tubular member according to one aspect of the present invention is a tubular member capable of contacting the end surface and / or inner surface of the formwork or the pipe when installed at one end of the tubular formwork or the pipe. hand,
When it is engageable along the central axis with a rod-shaped member installed on the opposite side of one end of the formwork or pipe and is fixed to the first temporary frame on the other end side of the rod-shaped member. In the engaged state, a force along the axial direction can be applied to the formwork or the pipe toward the first temporary frame. Then, it can be connected to the second temporary frame on the opposite side of the first temporary frame.

According to the present invention, when forming a through hole in concrete casting, a formwork for forming the through hole can be easily fixed to the temporary frame.

It is sectional drawing which showed the formwork and the member used for forming a through hole in 1st Embodiment. It is a top view which showed the cylindrical member used for forming a through hole. It is a top view which showed the cylindrical member used for forming a through hole. It is a figure which showed a part of the construction process which forms a through hole. It is a figure which showed a part of the construction process which forms a through hole. It is a figure which showed a part of the construction process which forms a through hole. It is a figure which showed a part of the construction process which forms a through hole. It is a figure which showed a part of the construction process which forms a through hole. It is a top view of the plug in 2nd Embodiment. It is sectional drawing of the plug in 2nd Embodiment. It is a top view of the plug in 3rd Embodiment. It is sectional drawing of the plug in 3rd Embodiment. It is sectional drawing which showed the formwork and the member used for forming a through hole in 4th Embodiment. It is a top view of the plug in 4th Embodiment. It is a top view of the plug in 5th Embodiment. It is sectional drawing of the plug in 5th Embodiment. It is sectional drawing of the plug in 6th Embodiment. It is sectional drawing of the plug in 7th Embodiment.

Hereinafter, a method of forming a through hole, which is an embodiment of the present invention, will be described with reference to the drawings.

FIG. 1 is a cross-sectional view showing a member used for forming a formwork and a through hole in the first embodiment. 2 and 3 are plan views showing a tubular member (hereinafter referred to as a plug) used for forming a through hole.

The through frame material (hereinafter referred to as a formwork) 100 is composed of a pipe 105 made of vinyl or the like and tubular joints 110 and 120, and the inner surfaces 110K and 120K of the joints 110 and 120 cover the entire circumferential direction. The protrusions 112 and 122 are formed. Both end faces of the pipe 105 are attached to the joints 110 and 120 with an adhesive or the like, and are integrally configured. The outer peripheral surface of the vinyl pipe 105 may be joined to a part of the inner surfaces 110K and 120K of the joints 110 and 120 with an adhesive or the like.

The plugs 20 and 40 are tubular members that can be used when fixing the formwork 100 to the temporary frame, and when the plugs 20 and 40 are installed at both ends of the formwork 100, the plugs 20 and 40 are relative to the axis E of the formwork 100. Arranged coaxially. Here, the plug 20 is installed at one end 100T2 of the formwork 100, and the plug 40 is installed at the other end 100T1. The plugs 20 and 40 are made of a synthetic resin such as vinyl chloride and can be screwed.

The plugs 20 and 40 are provided with main body portions 20B and 40B having a diameter corresponding to the diameter near both ends 100T2 and 100T1 of the mold 100, and flanges 25 and 45 are formed on one surface 20S1 and 40S1 side, respectively. ing. When the plugs 20 and 40 are installed at both ends T2 and T1 of the mold 100, the end faces 110S and 120S of the joints 110 and 120 come into contact with the surfaces 25S and 45S of the flanges 25 and 45, respectively.

The plugs 20 and 40 have through holes 22 and 42, respectively, and are provided with stepped portions 21 and 41 that expand the space toward the flanges 25 and 45, respectively. As shown in FIGS. 2 and 3, the hole portion 22B having a relatively large diameter is formed in a hexagonal shape, and the hole portion 22A having a relatively small diameter is formed in a circular shape. The through holes 22 and 42 of the plugs 20 and 40 have the same shape and size as each other including the stepped portions 21 and 41. On the other hand, the flanges 25 and 45 of the plugs 20 and 40 are different in size, and the flange 45 is formed with a hole 41A through which a nail can be passed.

The bolt 60 is a rod-shaped member used when fixing the formwork 100 to the temporary frame, and here, it is composed of all screw bolts in which male screws 60M are formed throughout. A nut 62 is screwed to one end 60T2 of the bolt 60, and nuts 64 and 66 having different sizes are screwed to the other end 60T1. The hole portion 22A of the through hole 22 of the plugs 20 and 40 and the hole portion 42A of the through hole 42 are sized so that the bolt 60 can pass through. Further, the hole portions 22B and 42B of the plugs 20 and 40 are determined in shape and size so as to be able to accommodate the hexagonal nuts 64 and 66.

4 to 8 are views showing a process procedure of construction for forming a through hole.

After the reinforcing bars F have been arranged, the worker first installs one plate-shaped temporary frame (hereinafter referred to as the first temporary frame) F1 at a predetermined position. Here, it is installed along the vertical direction. The operator installs the plugs 20 and 40 at both ends 100T1 and 100T2 with respect to the formwork 100 which is a through frame material. Then, the bolt 60 is passed through the mold 100, the nut 62 is screwed into the end 60T2 of the bolt 60, and the nut 64 is screwed into the end 60T1 of the bolt 60.

After the nut 62 is screwed into the end 60T2 of the bolt 60, the bolt 60 is passed through the through hole 22 of the plug 20, the formwork 100, and the through hole 42 of the plug 40, and then passed through the end 60T1 of the bolt 60. On the other hand, the nut 64 may be screwed.

After passing the bolt 60 through the hole FN formed in the first temporary frame F1, the operator tightens the nut 66 from the outside of the first temporary frame F1 via the washer W to fix the bolt 60 (FIG. 5). The nut 62 screwed into the end portion 60T2 of the bolt 60 comes into contact with the stepped portion 21 of the plug 20 and does not rotate at the hole portion 22A of the plug 20. Therefore, as the nut 66 is tightened, the formwork 100 receives a force along the axial direction from both the plugs 20 and 40.

Further, when the nut 66 is tightened and the bolt 60 is fixed to the first temporary frame F1, the mold 100 that comes into contact with the flange 25 of the plug 20 is positioned while being pushed from the plug 20 to the first temporary frame F1 side. To. When the formwork 100 receives a force along the axial direction acting from the end portion 100T2 side opposite to the first temporary frame F1 toward the first temporary frame F1, the formwork 100 moves in the axial direction. It is fixed to the first temporary frame F1 while being maintained in the horizontal direction. Further, here, the operator connects the plug 40 to the first temporary frame F1 by driving the nail P into the first temporary frame F1 through the hole 41A formed in the plug 40.

After fixing the formwork 100 to the first temporary frame F1, the other plate-shaped temporary frame (hereinafter referred to as the second temporary frame) F2 is attached to the end portion 100T2 of the formwork 100 (the surface 20S1 of the plug 20). (See Fig. 6). Then, the operator uses the screw B to screw the plug 20 to the second temporary frame F2. For example, screwing is performed at predetermined intervals along the peripheral edge direction shown in FIG. 3, but screwing may be performed at any other place.

When the formwork 100 is positioned and fixed between the first and second temporary frames F1 and F2, a predetermined amount of cement is poured while being compacted. When the cement hardens to form concrete CF (see FIG. 7), the nut 66 is removed from the bolt 60 to release the fixing of the bolt 60 to the first temporary frame F1. Then, by turning the bolt 60 in the loosening direction, the bolt 60 is pulled out from the inside of the mold 60.

After that, the operator removes the first temporary frame F1 while being connected to the plug 40, and removes the second temporary frame F2 while being connected to the plug 20 (see FIG. 8). As a result, the through hole OP is formed in the concrete CF. The bolt 60 may be pulled out together with the first temporary frame F1 or the second temporary frame F2 while being screwed to either the nut 62 or 64 without being pulled out from the mold 60.

As described above, according to the present embodiment, the plugs 40 and 20 are installed at both ends 100T1 and 100T2 of the formwork 100 which is a through frame material, respectively, and one end 60T2 of the bolt 60 is plugged without protruding from the plug 20. 20 is engaged with the through hole 22 formed around the central axis, and is passed through the mold 100 and projected from the plug 40. Then, the nut 66 is tightened to the first temporary frame F1 on the other end 60T1 side of the bolt 60, and the formwork 100 is positioned and fixed to the first temporary frame F1. When the second temporary frame F2 is installed, the plug 20 is screwed and connected from the front side of the second temporary frame F2. Then, after placing the concrete, the first and second temporary frames F1 and F2 are removed with the plugs 40 and 20 attached.

The formwork 100 can be positioned in the horizontal direction only by the first temporary frame F1, does not require the work of attaching a sleeve holder or the like to the reinforcing bar F or the like, and does not require the installation of the second temporary frame F1. It is possible to easily and surely mount the 100 at an accurate position in a place where the mounting difficulty is high.

The formwork 100 is positioned so that the bolt 60 pulls the plug 20 toward the first temporary frame F1, and the formwork 100 is cantilevered and supported by the first temporary frame F1 portion. .. Therefore, even if the formwork 100 is composed of a plurality of tubular members such as a pipe 105 and joints 110 and 120, the formwork 100 can be easily positioned along the horizontal direction, and the formwork 100 is an axis. Even if the size is long in the direction, it can be securely fixed.

On the other hand, the first and second formwork F1 and F2 can be removed with the plugs 40 and 20, respectively. Therefore, the construction of the through hole formation can be completed at the same time as the removal of the first and second formwork F1 and F2. Further, the plugs 20 and 40 can be reused by removing the plugs 40 and 20 from the first and second molds F1 and F2.

In the present embodiment, the flange 25 of the plug 20 and the flange 45 of the plug 40 are in contact with the end faces (end faces 110S and 120S of the joints 110 and 120) of both ends 100T2 and 100T1 of the formwork 100, but the joints 110 and 120. The side surfaces 112S and 122S of the protrusions 112 and 122 may be in contact with the inner surfaces 20S2 and 40S2 of the flanges 20 and 40 (see FIG. 1). Alternatively, it is possible to make both of them come into contact with each other.

Next, the plug according to the second embodiment will be described with reference to FIGS. 9 and 10. In the second embodiment, unlike the first embodiment, the plug is not formed with a flange.

FIG. 9 is a plan view of the plug in the second embodiment. FIG. 10 is a cross-sectional view of the plug in the second embodiment. The plug 220 has a through hole 222 around the central axis, and by providing a step portion 221, a hole portion 222B into which the hexagon nut 62 is fitted and a hole portion 222A through which the bolt 60 passes are formed. Further, a mark 220P that serves as a mark for the screw fixing position is provided along the peripheral edge direction of the surface 220S. By installing the plug 20 that does not form a flange on the formwork 100, after removing the second temporary frame F2, the end face of the through hole OP becomes a shape along the side surface of the concrete CF.

Next, the plug according to the third embodiment will be described with reference to FIGS. 11 and 12.

FIG. 11 is a plan view of the plug according to the third embodiment. FIG. 12 is a cross-sectional view of the plug according to the third embodiment. The plug 320 is composed of a tubular portion 321 having a relatively large diameter and a tubular portion 322T having a relatively small diameter, and is joined by a known connecting means such as an adhesive. The plug 320 has a through hole 322 around the central axis, and by providing a step portion 321, a hole portion 322B into which the hexagon nut 62 is fitted and a hole portion 322A through which the bolt 60 passes are formed.

Here, the hexagonal columnar insertion member 330 is pushed into the hole portion 322B when the through hole is formed. As shown in FIG. 11, a mark P that serves as a mark for the screw fixing position is provided along the peripheral edge direction of the surface 220S, and is also provided on the hexagonal member 330. Since the plug 20 can be screwed to the center of the plug 20 in this way, the plug 20 can be firmly connected to the second temporary frame F2, and the number of screws at the peripheral portion can be reduced. The insertion member 330 may be formed in a shape other than the hexagonal medium shape such as a columnar shape.

Next, the plug according to the fourth embodiment will be described with reference to FIGS. 13 and 14. In the fourth embodiment, unlike the first to third embodiments, the plug installed on the second formwork side is screwed with the bolt end portion.

FIG. 13 is a cross-sectional view showing a member used for forming a formwork and a through hole in a fourth embodiment. FIG. 14 is a plan view of the plug according to the fourth embodiment. The plug 20'is composed of a columnar portion 21'forming a flange 25'and a tubular portion 22' having a hole 22'N formed around the central axis, and the columnar portion 21'and the tubular portion 22' are joined to each other. are doing. A female screw 22M'is formed on the inner peripheral surface of the bottomed hole 22' of the tubular portion 22'. Similar to the first embodiment, the end portion T2 of the bolt 60 is screwed in the hole 22', and the bolt 60 is tightened and fixed to the first temporary frame F1 so that the plug 20'is attached to the mold 100. Therefore, a force along the axial direction can be applied to the first temporary frame F1 side. In addition, the nut 62 does not need to be tightened, which improves the process work. Then, as in the third embodiment, it can be screwed to the center of the plug 20'.

Next, the plug according to the fifth embodiment will be described with reference to FIGS. 15 and 16. In the fifth embodiment, unlike the fourth embodiment, the plug is not provided with a flange, and a through hole having no step portion is formed.

FIG. 15 is a plan view of the plug according to the fifth embodiment. FIG. 16 is a cross-sectional view of the plug according to the fifth embodiment. The plug 20 "has a through hole 22" having a constant diameter, and a female screw 22 "M" is formed on the inner peripheral surface. As a result, the axial length of the plug 20 "can be suppressed, and the pipe end surface can be suppressed. Weights can be concentrated in the vicinity to stabilize fixing along the axial direction (horizontal direction).

FIG. 17 is a cross-sectional view of the plug according to the sixth embodiment. The plug 420 has a through hole 422. On the other hand, unlike the first to third embodiments, the plug 420 is provided with an annular recess 430 on the mold 100 side. As a result, the weight of the plug 20 is reduced.

FIG. 18 is a cross-sectional view of the plug according to the seventh embodiment. The plug 520 includes an engaging portion 540 provided with a bottomed hole 522 in which a female screw 522M is formed, and an annular recess 530 is formed around the engaging portion 540. By forming the engaging portion 540 around the annular recess 530, the axial length can be suppressed.

In the first to seventh embodiments, the plugs are installed at both ends of the formwork, but the plugs are installed only at the ends on the second formwork side and at the ends on the first formwork side. May be configured without a plug. In addition, depending on the structure of the bolt with the head and the rod-shaped member other than the bolt, the plug installed on the second formwork side and the formwork along the axial direction exert a force on the first temporary formwork side. An engaging structure (fitting, hooking, etc.) may be adopted.

The method of connecting the plug on the second temporary frame side to the second temporary frame may be a method other than screwing. Further, the end portion of the mold 100 may be connected to the second temporary frame to be stabilized and fixed without performing the step of connecting the plug to the second temporary frame. In this case, the material of the plug is arbitrary under the condition that it can be engaged with the rod-shaped member.

Although the formwork 100 is used as a formwork for forming through holes, it can be installed as it is even after concrete is placed for applications such as drainage pipes, gas pipes, exhaust pipes, and ventilation pipes. Of course, it can also be configured as a through frame material to be removed after concrete is placed for the purpose of forming through holes for wiring. Further, the through hole may be formed by using an actual pipe instead of a form such as a sleeve.

20 plugs 40 plugs 60 bolts

Claims (13)

The process of installing the first temporary frame and
At least one end of the tubular formwork or pipe away from the first temporary frame is a tubular member engageable with the rod-like member and in contact with the end and / or inner surface of the formwork or pipe. , Installation process and
A step of engaging one end of the rod-shaped member with the tubular member and passing it through the formwork or piping.
A step of fixing the rod-shaped member to the first temporary frame so that the cylindrical member exerts a force along the axial direction on the formwork or the pipe toward the first temporary frame.
The process of installing the second temporary frame according to the position of the formwork or piping fixed to the first temporary frame, and
The step of connecting the tubular member to the second temporary frame and
After placing the concrete, the step of releasing the fixing of the rod-shaped member to the first temporary frame and
A method for constructing a through hole, which comprises a step of removing the second temporary frame in a state where the tubular member is connected. The rod-shaped member is passed through a through hole formed along the central axis of the tubular member.
Claim 1 is characterized in that the rod-shaped member is engaged with the tubular member by abutting the contact portion provided at one end of the rod-shaped member with the stepped portion of the through hole. Construction method of through hole described in. The rod-shaped member is a bolt and
The method for constructing a through hole according to claim 2, wherein one end of the rod-shaped member is brought into contact with the stepped portion by screwing a nut into one end of the rod-shaped member. The method for constructing a through hole according to claim 1, wherein the rod-shaped member is screwed into the tubular member to engage the rod-shaped member with the tubular member. The rod-shaped member is a bolt and
The method for constructing a through hole according to claim 4, wherein the rod-shaped member is screwed into a female screw portion provided along the central axis of the tubular member. The invention according to any one of claims 1 to 5, wherein the tubular member is connected to the second temporary frame by screwing the tubular member from the surface side of the second temporary frame. The method of constructing the through hole described. The method for constructing a through hole according to any one of claims 1 to 6, wherein the tubular member is installed at both ends of the formwork or the pipe. The method for constructing a through hole according to any one of claims 1 to 7, wherein a through hole is formed by a plurality of formwork, a plurality of pipes, or a combination of the form and the pipe. The process of installing the first temporary frame and
A step of installing a tubular member capable of contacting the end surface and / or the inner surface of the formwork or the pipe at at least one end of the formwork or the pipe away from the first temporary frame.
Engage one end of the rod-shaped member with the tubular member and pass it through the formwork or pipe.
Construction of a through hole comprising the step of fixing the formwork or pipe to the first temporary frame by fixing the rod-shaped member to the first temporary frame at the other end. Method. A tubular member that can be used for the method of constructing through holes.
A tubular member that, when installed at one end of a tubular formwork or pipe, is capable of contacting the end and / or inner surface of the formwork or pipe.
It is engageable along the central axis with a rod-shaped member that can be fixed to the first temporary frame installed on the side opposite to one end of the formwork or the pipe, and is opposite to the first temporary frame. A tubular member characterized in that it can be connected to a second temporary frame installed on the side. 10. The tubular member according to claim 10, further comprising a through hole formed around a central axis and provided with a stepped portion that expands a space toward the end of the formwork or pipe. The tubular member according to claim 10, wherein the tubular member is formed around a central axis and has a screwed portion that can be screwed with one end of the rod-shaped member. The tubular member according to any one of claims 10 to 12, wherein an annular recess is formed around the engagement portion with the rod-shaped member.

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