JP3743791B2 - Through sleeve - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, for example, when a through-hole is provided in a beam, wall, or column of a reinforced concrete structure, the penetration is made prior to placing concrete in a concrete casting form (hereinafter simply referred to as “formwork”). The present invention relates to a through sleeve for forming a hollow portion for a hole at a predetermined position, and more specifically, relates to a through sleeve that is attached across a pair of molds between a pair of opposed molds.
[0002]
[Prior art]
Conventionally, when this type of penetrating sleeve is attached to a mold, a simple cylindrical member formed of cardboard or the like is placed between the pair of molds to support it, for example, nails or the like are attached to both ends of the cylindrical member. It was attached by being driven obliquely so as to reach the mold from a plurality of locations in the circumferential direction in the part.
[0003]
[Problems to be solved by the invention]
However, as described above, in order to drive the nail obliquely and attach it to the mold, it is necessary to cut the tubular member to an accurate length in accordance with the distance between the opposing molds at each hole forming position. For example, the mounting operation of the cylindrical member is very complicated.
The same applies to the nailing operation. In other words, the work must be performed while supporting the cylindrical member in a narrow space in a state where the reinforcing bars and the like are arranged in the mold, and the work efficiency is never good.
On the other hand, there were various problems even after concrete placement.
For example, since the nail remains protruding from the concrete when the mold is removed, the nail must be cut. Alternatively, if the nail is forcibly pulled out, the concrete around the nail may be lost.
Furthermore, when the cylindrical member is made of paper, the removal of the cylindrical member becomes very complicated. That is, the cylindrical member itself cannot be pulled out as it is, and has to be cut into pieces and removed. In principle, the cylindrical member is disposable, and it has been desired to improve its economical efficiency.
In view of the above-described drawbacks, an object of the present invention is to provide an economical penetrating sleeve that can simplify the attaching operation and the removing operation of the penetrating sleeve with respect to the mold and that can be reused.
[0004]
[Means for Solving the Problems]
(Constitution)
FEATURES structure of leadthroughs of the present invention for achieving this objective is provided with a first attachment member and second attachment member attached to another each to a pair of the concrete設用mold, said first mounting member a first sleeve having a mating connection freely one end to, and a second sleeve having a mating connection freely end in the second mounting member, said first sleeve and said second sleeve, deployed state In this case, it is formed of an elastic flexible member that is substantially rectangular flat and can be formed into a substantially cylindrical shape by winding, and is wound out of two opposing edges in the unfolded state. An outward convex portion protruding radially outward is formed along the edge located on the inner side in the state, and an inward convex projecting radially inward along the edge located on the outer side in the wound state Part is formed, the outward convex part and the A direction projecting portions constitute freely disengaged from each other, the other end portion of the first sleeve and the other end portion of the second sleeve is fitted together, in that the telescopically configured.
[0005]
(Action / Effect)
The penetrating sleeve having this characteristic configuration has the following actions and effects.
That is, since the first sleeve and the second sleeve are obtained by rounding a substantially rectangular flat flexible member into a cylindrical shape, variability in the outer diameter of both sleeves can be easily obtained. Then, by using the first sleeve and the second sleeve in a state where the outer diameters are different from each other and the other end portions of both sleeves are overlapped, the first sleeve and the second sleeve are both It becomes telescopic in the axial direction of the sleeve.
As a result, after the cast concrete has hardened, the penetration sleeve can be easily removed. That is, by reducing the outer diameter of the first sleeve and the second sleeve, both the sleeves are easily peeled from the cured structure. Therefore, the sleeve can be easily removed.
Moreover, since these sleeves are usually made of an elastic flexible member such as plastic or rubber, they are not damaged by the removal and can be reused any number of times.
In addition, since the first sleeve and the second sleeve are used in a freely stretchable manner, the total length of both sleeves can be arbitrarily determined. For this reason, the sleeve of the present invention can be applied to construction of beams / walls of any thickness. Unlike conventional cardboard sleeves, there is no error in length due to cutting, and the operation of setting the sleeve between the concrete molds is very simple.
Furthermore, the outer diameter dimensions of the first sleeve and the second sleeve can be easily determined.
That is, an engaging portion is provided along two opposing edges of each of the sleeve members that are substantially rectangular in the deployed state, and the first sleeve and the second sleeve can maintain a constant cylindrical shape. Like that. Specifically, an outward convex portion is provided along the edge located on the inner side in a wound state, and an inward convex portion is provided along the edge located on the outer side.
For example, if either one of the outward convex portion or the inward convex portion is formed as a plurality of convex portions, and the outer diameter dimension of both the sleeves can be arbitrarily set, it becomes more convenient.
In addition, if one of the outward convex portion and the inward convex portion is formed in plural and the outer diameter dimension can be arbitrarily set, the same member is used as the first sleeve or the second sleeve. This is advantageous in terms of economy.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to FIGS.
[0009]
(Overview)
The through-sleeve of the present invention is used, for example, when forming a through-hole through which an air-conditioning pipe, a cable, or the like can be inserted and placed in a beam, a wall, a column, or the like when building a concrete structure building.
[0010]
An example of the implementation of the penetration sleeve according to the present invention is shown in FIGS.
Here, the first mounting member 1 and the second mounting member 2, and the first sleeve 3 and the second sleeve 4 are configured.
The first mounting member 1 and the second mounting member 2 are assembled by a nail or the like at a predetermined position of the molds 5 and 5 after assembling the pair of molds 5 and 5 that are arranged to face each other to place concrete. Mounted. Next, the first sleeve 3 and the second sleeve 4 are built in the rebar 7 assembled in advance, and the assembled rebar 7 is lowered into the molds 5 and 5 and positioned. Thereafter, the first sleeve 3 and the second sleeve 4 are attached between the first attachment member 1 and the second attachment member 2.
After placing concrete in the molds 5 and 5 and curing, removing the molds 5 and 5, the mounting member, the sleeve, and the like complete the beam 14 having the through holes 12. Become.
The details of the first mounting member 1, the second mounting member 2, the first sleeve 3, and the second sleeve 4 will be described below.
[0011]
(Mounting member)
The first mounting member 1 and the second mounting member 2 are members for holding the first sleeve 3 and the second sleeve 4 respectively, and the both mold frames 5 are matched to the positions where through holes are formed. , 5.
The first mounting member 1 and the second mounting member 2 are made of a flexible material such as rubber or plastic having a spring hardness Hs (JIS A) of 60 to 90 degrees according to JIS K 6301 (vulcanized rubber physical test method). Consists of.
As shown in FIG. 3, the first attachment member 1 and the second attachment member 2 have flanges 10 for attachment to the molds 5 and 5. For example, a nail as a fixing member 6 is inserted into the flange 10 and driven into the molds 5 and 5 to fix the first mounting member 1 and the second mounting member 2 to the molds 5 and 5.
The flange 10 may or may not be provided with a hole through which the fixing member 6 is inserted. Any configuration may be used as long as the fixing member 6 penetrates.
The first and second mounting members 1 and 2 have tapered portions 11 to which the first and second sleeves 3 and 4 are fitted. With this configuration, the first and second mounting members 1 and 2 and the first and second sleeves 3 and 4 are in close contact with each other, and the first and second sleeves 3 and 4 can be held without play. it can.
[0012]
(sleeve)
The first sleeve 3 and the second sleeve 4 are made of an elastic flexible material selected from hard plastic or rubber having a spring hardness Hs (JIS A) of 70 degrees or more. . Of course, the material of the sleeve or the mounting member may be a virgin material or a recycled material.
The first and second sleeves 3 and 4 are formed in a substantially cylindrical shape that can be easily changed in outer diameter during use. For example, the outer diameter of the first sleeve 3 is formed larger than the outer diameter of the second sleeve 4, and the second sleeve 4 is slidably fitted inside the first sleeve 3.
Both the sleeves 3 and 4 are attached between the first and second attachment members 1 and 2. At this time, the open end portions of the sleeves 3 and 4 are brought into contact with the tapered portions 11 of the first and second mounting members, and are held without play.
At the connecting portion between the first and second mounting members 1 and 2 and the first and second sleeves 3 and 4, the placed concrete is fastened so as not to enter the sleeves 3 and 4. 13 is applied. In this case, for example, it is convenient to use a material such as a gummed tape, and not only the effect of sealing, but also the displacement of each member can be effectively prevented.
With this configuration, the first and second sleeves 3 and 4 can be attached regardless of the distance between the molds 5 and 5.
As shown in FIG. 3, the first and second sleeves 3 and 4 have a substantially cylindrical shape. This is formed in a substantially cylindrical shape from the beginning by performing extrusion molding. Therefore, although these first and second sleeves 3 and 4 maintain a predetermined outer diameter state, the substantially cylindrical peripheral surface is discontinuous. That is, it is the structure which rounded the member which exhibits a substantially rectangular shape in the expanded state.
Of the four edges of the rectangular shape, convex parts for engagement are formed on each of two edges (hereinafter referred to as overlapping edges) that are overlapped when rounded. That is, an outward convex portion 8 that protrudes toward the outer side of each of the sleeves 3 and 4 is formed on the inner edge portion of the overlapping edge portion, while the outer edge portion of the sleeve is formed on the outer edge portion. An inward projection 9 that protrudes inward is formed. The convex portions 8 and 9 may have any shape as long as they can be engaged with each other. For example, the structure extended continuously along an edge part may be sufficient, and the structure dotted along the edge part may be sufficient.
In the case where the convex portions continuous along the edge portion are formed, the same effect as that in which the reinforcing ribs are formed on the sleeves 3 and 4 is produced. The advantage that deformation of 4 can be prevented is also obtained.
Although the sleeves 3 and 4 before use are substantially cylindrical, the overlapping edge portions are in a separated state. That is, in use, an operator applies a force so as to reduce the diameters of both the sleeves 3 and 4 and engages the outward convex portion 8 and the inward convex portion 9 to obtain a predetermined outer diameter state. Hold.
The overlapping edge portions of the first and second sleeves 3 and 4 or the connecting portions of the first and second sleeves 3 and 4 are provided with stitches 13 using gum tape or the like.
It is convenient that one of the overlapping edges is provided with a plurality of the convex portions so that the outer diameter of the substantially cylindrical shape can be appropriately selected. That is, since it can be used as the first sleeve 3 or the second sleeve 4 while using the same sleeves 3 and 4, it is easy to use.
[0013]
(Sleeve removal)
After the cast concrete has hardened, first, the molds 5 and 5 are removed.
At this time, the mounting members 1 and 2 are easily detached together with the molds 5 and 5. The first and second sleeves 3 and 4 are not simply pulled out, but at one end, the sleeve diameter is reduced, and the first and second sleeves 3 and 4 are peeled off from the cured structure. Remove later. At this time, the resistance of the gummed tape or the like previously used for sealing does not matter so much.
Since both the sleeves 3 and 4 are made of a member such as plastic or rubber, there is no inconvenience such as a decrease in strength of the material itself due to moisture absorption, and no damage such as tearing occurs at the time of removal. Therefore, in the case of the conventional cardboard tube member, it has been necessary to peel and remove it by breaking it into pieces, but when using the first and second sleeves 3 and 4 of the present invention, it is removed. Work can be greatly simplified. Moreover, while the conventional cylindrical member is a consumable item, the first and second sleeves 3 and 4 of the present invention can be reused, which is advantageous in terms of economy. Moreover, it can be said that it is excellent also in terms of environmental protection in that no waste is generated.
The shape of the through-hole 12 after removing the first and second sleeves 3 and 4 is a position in the middle of the through-hole 12 in the axial direction of the first sleeve 3 and the second sleeve 4. There is a step by the difference in diameter. However, the level difference is only slightly with respect to the hole diameter of the through hole 12, and does not hinder the subsequent piping work.
[0014]
In addition, although the code | symbol is written in order to make contrast with drawing convenient for the term of a claim, this invention is not limited to the structure of an accompanying drawing by this entry.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a state where a penetration sleeve of the present invention is attached to a formwork. FIG. 2 is a cross-sectional view of a beam after construction is completed. FIG. 3 is a perspective view showing first and second sleeves of the present invention. Explanation of]
DESCRIPTION OF SYMBOLS 1 1st attachment member 2 2nd attachment member 3 1st sleeve 4 2nd sleeve 5 Formwork for concrete placement

Claims (1)

A through sleeve that is attached across a pair of concrete placement molds (5, 5) arranged opposite to each other,
A first mounting member (1) and a second mounting member (2), which are individually attached to the pair of concrete casting molds (5, 5);
A first sleeve (3) having one end that can be fitted and connected to the first mounting member (1), and a second sleeve (4) having one end that can be fitted and connected to the second mounting member (2). And
The first sleeve (3) and said second sleeve (4), a substantially rectangular flat shape In the deployed state, and constituting a flexible member of the molding, resilient in a substantially cylindrical shape by winding With
In the unfolded state, an outward convex portion (8) protruding outward in the radial direction is formed along the edge located on the inner side in the wound state among the two opposing edges, and the wound state An inward convex portion (9) projecting radially inward is formed along the edge located on the outer side, and the outward convex portion (8) and the inward convex portion (9) are disengaged from each other. Configure freely
The other end and are fitted to each other, telescopically Configured leadthroughs of the other end portion and the second sleeve (4) of the first sleeve (3).

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