JP7053309B2 - How to use the strut mounting hole forming device and the strut mounting hole forming device - Google Patents

Description

The present invention relates to, for example, a method of using a support column mounting hole forming device and a support column mounting hole forming device for forming holes for attaching the handrails and fence columns in order to install handrails and fences on the veranda of each living room of an apartment house. ..

Conventionally, when a handrail or a fence is installed on a veranda of an apartment house or the like, a mounting hole for inserting the handrail or the support of the fence into the concrete skeleton forming the veranda has been provided. The mounting holes were formed as traces of a mold in which a mold for the mounting hole was installed before the concrete was poured into the formwork forming the concrete frame, and the cast concrete was pulled out after the poured concrete was solidified. Here, the mold for the mounting hole was installed in the formwork in a suspended state with respect to the formwork in consideration of the ease of pulling out the formwork.

For example, in Patent Document 1, the pull-out mold that forms the mounting hole is bolted to the upper end portion with a jig that straddles both ends of the formwork that forms the tip portion of the concrete skeleton, and is in an air-printed state with respect to the formwork. Has been done. Then, after removing the jig, a bolt is screwed in and floated so as to peel off the pulling die from the concrete skeleton, so that the pulling die is pulled out to form a mounting hole (for example, paragraph "0014", FIG. 1, and See FIG. 8).

Japanese Unexamined Patent Publication No. 2011-80322

However, in the technique disclosed in the above-mentioned patent document, since the width of the upper end portion of the formwork is narrow, there is a possibility that it is difficult to fix the clasp for attaching the jig. Furthermore, since the tip of the concrete skeleton has an inclination, the clasp must be processed so as to match the heights of both ends of the different formwork. In addition, the female screw member attached to the lower end of the pull-out mold for screwing the bolt may stick to the concrete skeleton, and the pull-out mold may not be easily peeled off.

In general, reinforcing bars that supplement the strength of concrete are arranged in advance in the formwork that forms the concrete frame, and the positions of the mounting holes are limited, so it is easy to position the mold that forms the mounting holes. Should be. Further, a soft mold such as a sponge cannot withstand the compressive force of concrete and may not be able to maintain its shape. Therefore, a hard mold should be adopted. Furthermore, in order to improve workability and reduce member costs, the number of new members associated with the formation of mounting holes should be small, and existing members should be diverted.

Therefore, an object of the present invention is a support column mounting hole forming device and a support column mounting hole that can position a mold for forming a mounting hole, reliably form a mounting hole in a desired shape, and can be diverted to the formation of another mounting hole. To provide a method of using the forming apparatus.

That is, the support column mounting hole forming device according to the present invention is a die member for forming a support column mounting hole in the concrete skeleton and a jig for suspending the punching die member inside the formwork forming the concrete skeleton. The jig comprises a support member arranged on the outside of the formwork, a connecting member that detachably connects the support member and the punching die member across the formwork, and the support member. It is characterized by being provided with a fixing member that is detachably fixed to the side wall portion of the formwork.

It is desirable that the connecting members are connected so that the height of the punching die member and the height of the strut member are the same.

The fixing member penetrates the L-shaped foam tie that is fixed from the outside of the side wall portion of the formwork while being hooked on the support column member, the slit of the foam tie, and the side wall portion of the formwork. It is desirable to provide a rod-shaped separator fixed from the inside of the formwork, and a substantially triangular wedge member for tightening the foam tie and the separator to the support column member.

A demolding member for pulling out the die-cutting member fixed to the concrete skeleton and from which the jig has been removed is further provided, and the die-cutting member is provided downward from the ceiling portion having a through hole and the edge of the ceiling portion. It is desirable that the ceiling portion is formed so as to have a provided leg portion and a gap is formed between the ceiling portion and the upper end portion of the die-cutting member in a state of being placed on the concrete skeleton.

The method of using the support column mounting hole forming device according to the present invention is to use a punching die member suspended in the air inside the formwork forming the concrete skeleton and outside the formwork in order to form a support column mounting hole in the concrete skeleton. The strut members to be arranged are detachably connected by a connecting member so as to have the same height, and an L-shaped foam tie is attached from the outside of the side wall portion of the formwork while being hooked on the strut member. Detachably fixed, the rod-shaped separator is fixed from the inside of the formwork in a state of penetrating the slit of the foam tie and the side wall portion of the formwork so that it can be split freely from the outside, and the foam is attached to the support column member. The tie and the separator are detachably fastened with a substantially triangular wedge material, and the mold is removed with a ceiling portion formed so as to form a gap with the upper end portion of the die-cutting member in a state of being placed on the concrete frame. It is characterized in that a screw member is screwed into a through hole provided in the ceiling portion of the member to remove the die member.

In the method of using the support column mounting hole forming device and the support column mounting hole forming device according to the present invention, the positioning of the mold for forming the mounting hole is easy, the mounting hole is surely formed in a desired shape, and another mounting hole can be formed. Can be easily diverted, so it can be expected to improve workability and reduce material costs.

A side view (a) and a plan view (b) of a state in which the support column mounting hole forming device according to the embodiment of the present invention is installed are conceptually shown. (A) to (c) are views showing the construction state of the support column mounting hole forming apparatus shown in FIG.

Hereinafter, the structure and usage of the support column mounting hole forming device (hereinafter, also referred to as “this support column mounting hole forming device”) according to the embodiment of the present invention will be described with reference to FIGS. 1 and 2.
In addition, in these figures, there is a part numbered only for one part about the same part which exists more than once. For convenience of explanation, a predetermined part and this leader line are shown by a broken line or an imaginary line (two-dot chain line), and a cross-sectional part is shown by hatching.

This pillar mounting hole forming device forms mounting holes for each of the pillars constituting the pillars, for example, in order to install handrails and fences that rise upward from the tip of the concrete skeleton of the veranda provided in each living room of the apartment house. It is a thing. The concrete skeleton of the veranda is formed by solidifying the liquid concrete material poured into the wooden formwork.
In addition, a reinforcing bar for reinforcing the strength of the concrete skeleton may be arranged inside the formwork.

This strut mounting hole forming device is a jig for suspending a punching die member 1 for forming a strut mounting hole H in a concrete skeleton C and a punching die member 1 inside a formwork F for forming a concrete skeleton C. 2 and a demolding member 3 for pulling out the die-cutting member 1 fixed to the concrete skeleton C and from which the jig 2 has been removed are provided.
The support column mounting hole forming device may be a die-cutting member 1, a jig 2, and a die-cutting member 3 assembled as separate parts at any time, or may be always integrated.

The punching die member 1 has a vertically long tapered shape. The punching die member 1 has a flat upper end portion. A screw hole for inserting and removing a bolt is provided in the upper end portion of the punching die member 1. According to this configuration, the punching die member 1 can be detachably suspended from the jig 2 with a bolt that can be inserted into and removed from the screw hole at the upper end portion. By twisting the bolt inserted into the screw hole at the upper end of the punching die member 1, the concrete skeleton C can be easily peeled off from the solidified concrete skeleton C, so that the punching die member 1 can be easily pulled out.
The cross-sectional shape of the die-cutting member 1 may be the same as or different from the cross-sectional shape of the column, and may be circular or rectangular. The material of the punching die member 1 is preferably a material that can withstand the compression of the concrete skeleton C and is easily diverted, and may be, for example, electrozinc-plated steel. The length of the punching die member 1 may be such that it can be suspended inside the mold F in relation to the jig 2.

The jig 2 includes a strut member 21 arranged outside the formwork and in contact with or adjacent to the side wall portion F1 of the formwork F, and the strut member 21 and the die-cutting member 1 separated by the side wall portion F1 of the formwork F. It is provided with a connecting member 22 for detachably connecting the support member 21 and a fixing member 23 for detachably fixing the support column member 21 to the side wall portion F1 of the formwork F.
According to this configuration, the support column member 21 is fixed to the punching die member 1 inside the formwork F by the fixing member 23 on the outside side of the formwork F and to the side wall portion F1 of the formwork F. The member 21 is stably installed, and the die-cutting member 1 can be easily suspended in the air via the connecting member 22. Since the connecting member 22 and the fixing member 23 have a structure that can be attached to and detached from each object, it is possible to easily perform from the assembly of the main column mounting hole forming device to the removal of the jig 2.
The cross-sectional shape of the support member 21 may be circular or rectangular. The material of the support member 21 may be the same as that of the punching member 1, and may be filled with concrete or the like or may have a hollow tubular shape. A cushion material such as sleepers may be interposed between the support column member 21 and the side wall portion F1 of the formwork F.

The connecting member 22 is connected so that the height of the punching die member 1 and the height of the strut member 21 are the same. Specifically, the connecting member 22 is formed by combining a flat plate material (not numbered) and an L-shaped plate material (not numbered), and one end of the flat plate material is an upper end portion of the support column member 21. The protruding portion of the L-shaped plate material fixed so as to have the same height as the above is screwed with a bolt, and the other end is screwed with the upper end portion of the die member 1 with a bolt.
According to this configuration, the upper end portion of the punching die member 1 and the upper end portion of the support column member 21 can be connected to each other via the connecting member 22 so as to have substantially the same height. The depth of the member 1 can be easily adjusted. That is, since the depth of the lower end portion of the punching die member 1 with respect to the formwork F corresponds to the height of the support column member 21, the mounting hole is likely to be formed at a desired depth.
When the upper end portion of the support column member 21 has a screw hole, the connecting member 22 may be only a flat plate material that can be screwed. The length of the connecting member 22 may be determined according to the positional relationship between the support column member 21 outside the formwork F and the punching die member 1 inside the formwork F. The connecting member 22 may be long and have a plurality of screw holes, and the position of the support member 21 may be appropriately determined. The connecting member 22 may be fixed to the strut member 21 so as not to be removable, or may be fixed with an adhesive or the like. The material of the strut member 21 is preferably a material that can be easily diverted, and may be, for example, electrozinc-plated steel.

The fixing member 23 is an L-shaped foam tie 23a fixed from the outside of the side wall portion F1 of the formwork F while being hooked on the support column member 21, a slit (not numbered) of the formwork 23a, and the formwork F. A rod-shaped separator 23b fixed from the inside of the formwork F while penetrating the side wall portion F1, and a substantially triangular wedge member 23c in which the foam tie 23a and the separator 23b are tightened to the support column member 21. It is composed of. Explaining each member, in the form tie 23a, one of the L-shaped portions is hooked on the support column member 21, and the other end of the L-shaped portion is screwed to the outside of the side wall portion F1 of the formwork F. be. The separator 23b passes from the slit of the foam tie 23a, passes by the side of the support column member 21, penetrates to the side wall portion F1 of the formwork F, is screwed from the inside of the formwork F with a P cone, and the P cone is screwed into the concrete skeleton C. It can be split freely from the outside while remaining in the concrete. The wedge material 23c is for tightening the foam tie 23a and the separator 23b in a state of being inserted from the slit of the separator 23b along one of the L-shaped portions of the foam tie 23a.
According to this configuration, regardless of whether or not the support member 21 is in contact with the ground, the support member 21 is combined with the foam tie 23a, the separator 23b, and the wedge member 23c with respect to the side wall portion F1 of the formwork F. Since it is stably fixed from the outside, the die member 1 is also stably suspended in the air. Since the foam ties 23a, separator 23b, and wedge material 23c can be easily transported, assembled, and disassembled, improvement in work efficiency can be expected.
The fixing member 23 may be, for example, a screw member that directly fixes the support column member 21 to the side wall portion F1 of the formwork F, or a predetermined attachment structure. The foam tie 23a, the separator 23b, and the wedge member 23c may be any shape, material, and structure that functions as the fixing member 23.

The demolding member 3 has a ceiling portion (not numbered) having a through hole (not numbered) and a leg portion (not numbered) provided below the edge of the ceiling portion, and has a concrete skeleton C. It is formed so that a gap is formed between the ceiling portion and the upper end portion of the die-cutting member 1 in the state of being placed on the ceiling. Specifically, the demolding member 3 has a gate shape, and the ceiling portion and the leg portion have a plate shape. The ceiling portion has at least a through hole having a diameter through which a bolt connecting the connecting member 22 and the punching member 1 can be inserted. The leg portions are formed so as to coincide with the inclined surface of the concrete skeleton C and to form a gap between the ceiling portion and the upper end portion of the die member 1.
According to this configuration, when a bolt is screwed into the screw hole of the die-cutting member 1 through the through hole in the ceiling portion of the die-cutting member 3, the pulling force is easily applied to the die-cutting member 1, so that it can be easily pulled out. Become.
The demolding member 3 may have a dome shape in which the ceiling portion and the leg portion are integrated. The material of the demolding member 3 is preferably a material that can be easily diverted, and may be, for example, electrozinc-plated steel. The distance from the upper end portion of the die-cutting member 1 to be maintained by the ceiling portion of the die-cutting member 3 may be such that the die-cutting member 1 does not collide with the concrete skeleton C when it is peeled off and lifted.

An example of an installation method and a removal method will be described as a method of using the support column mounting hole forming device with reference to FIGS. 1 and 2. In particular, FIG. 2 describes the flow of the method of pulling out the punching die member.
It is assumed that the formwork F and the reinforcing bars (not shown) are assembled in advance.

From FIG. 1, as a method of installing the main strut mounting hole forming device, first, a punching die member 1 suspended inside the formwork F forming the concrete skeleton C and a strut member 21 arranged outside the formwork F are provided. And are connected by fixing both ends of the connecting member 22 with screws so that the heights are the same. At this time, the foam tie 23a is fixed to the side wall portion F1 of the formwork F1 with screws in a state where the support column member 21 is hooked so as to be aligned with the planned position of the mounting hole H to be formed and is brought closer to the formwork F side. Next, the separator 23b is passed through the slit of the foam tie 23a to the side wall portion F1 of the formwork F so as to pass by the side of the support column member 21, and is fixed to the side wall portion F1 from the inside with a P cone. Then, the wedge member 23c is inserted into the slit of the separator 23b, and the foam tie 23a is pushed toward the formwork F to fix the support column member 21 to the formwork F.
By such an installation method, the die-cutting member 1 can be easily suspended in the planned position of the mounting hole H by connecting to the other end of the connecting member 22 extending inward across the side wall portion F1 of the formwork F.

From FIG. 1, as a method of removing the main strut mounting hole forming device, first, the connecting member 22 is removed from the punching die member 1 and the strut member 21. Next, the wedge material 23c is pulled out from the slit of the separator 23b, and the other end is divided from the outside while leaving one end of the separator 23b inside the side wall portion F1 of the formwork F (inside the concrete skeleton C), and the foam tie 23a The support column member 21 is removed from the side wall portion F1 of the formwork F by pulling out the foam tie 23a from the side wall portion F1 of the formwork F.

From FIG. 2, as a method of pulling out the die-cutting member 1, first, as shown in FIG. 2A, the die-cutting member 3 is placed on the concrete skeleton C so as to cover the upper side of the protruding die-cutting member 1. Place. The bolt used for connecting the die-cutting member 1 and the connecting member 22 is inserted into the screw hole of the punching die member 1 through the through hole in the ceiling portion of the die-cutting member 3 and screwed. After that, as shown in FIG. 2B, when a pulling force acts on the punching die member 1, the punching die member 1 is peeled off from the concrete skeleton C and floats, and a gap is formed between the punching die member 1 and the mounting hole H. Then, as shown in FIG. 2C, the drawing of the punching die member 1 is completed, and the mounting hole H is formed in the concrete skeleton C.
By such a removal method, each member can be diverted and easily stored and transported.
As the method of using the support column mounting hole forming device, any method or procedure may be used as long as the object of the present invention is achieved and a desired effect can be obtained.

1 Die-cutting member 2 Jig 21 Supporting member 22 Connecting member 23 Fixing member 23a Foam tie 23b Separator 23c Wedge material 3 Demolding member C Concrete skeleton F Formwork F1 Side wall part of formwork H Mounting hole

Claims (4)

A die member for forming a mounting hole for a support in the concrete skeleton and a jig for suspending the die member inside the formwork forming the concrete skeleton are provided.
The jig includes a support member arranged on the outside of the formwork, a connecting member that detachably connects the support member and the die-cutting member across the formwork, and the support member of the formwork. Equipped with a fixing member that can be detachably fixed to the side wall
The fixing member has an L-shape, and the foam tie is fixed from the outside of the side wall portion of the formwork with one end of the L-shape hooked on the support member, and the foam tie. A rod-shaped separator fixed by screwing with a bolt provided inside the formwork while penetrating the slit and the side wall portion of the formwork, and the foam tie and the separator for the support column member. It is provided with a substantially triangular wedge material that is inserted along one of the L-shaped portions of the form tie from the slit of the separator so as to be in a tightened state.
A strut mounting hole forming device characterized by this. The connecting member
The support column mounting hole forming device according to claim 1, wherein the height of the upper end of the punching die member and the height of the upper end of the support column member are connected so as to be the same. Further provided with a demolding member for removing the die-cutting member fixed to the concrete skeleton and from which the jig has been removed.
The demolding member has a ceiling portion having a through hole and a leg portion provided below the edge of the ceiling portion, and the demolding member is simply placed on the concrete skeleton. The connecting member and the punching member are connected via a bolt inserted through the through hole so that a gap is formed between the ceiling portion and the upper end portion of the punching die member.
The support column mounting hole forming device according to claim 1 or 2 . To form mounting holes for stanchions in the concrete skeleton
A punching die member suspended in the air inside the formwork forming the concrete skeleton and a strut member arranged outside the formwork can be detachably attached and detached by a connecting member so that the heights of the upper ends thereof are the same. Connect and
The L-shaped foam tie is detachably fixed from the outside of the side wall portion of the formwork in a state where one end of the L-shape is hooked on the support column member.
A rod-shaped separator is screwed into a bolt provided inside the formwork while penetrating the slit of the foam tie and the side wall portion of the formwork to be detachably fixed from the outside .
The formwork is filled with concrete to form a concrete skeleton.
The foam tie and the separator are detachably fastened to the support member by inserting a substantially triangular wedge material from the slit of the separator along one of the L-shaped portions of the foam tie .
A screw member is screwed from a through hole provided in the ceiling portion by a demolding member 3 having a ceiling portion formed so as to form a gap with the upper end portion of the die cutting member while being placed on the concrete skeleton. How to use the column mounting hole forming device, which is characterized by extracting a die member.

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