JPH0893266A - Earthquake resisting slit member - Google Patents

Abstract

PURPOSE: To improve work efficiency by forming a slit member, fitted to the concrete construction joint face or the like of a plate member with foam material stuck to one face or both faces thereof and a recessed part provided at the side edge, and fix the slit member to a form by a slit fitting piece. CONSTITUTION: A slit member 22 formed by sticking foam synthetic resin 24 to one face or both faces of a plate body 23 formed of hard vinyl chloride is fitted to a joint part between the wall and column of a concrete building or a construction joint part at the intermediate part of the wall, through slit fitting pieces 26 at the time of fitting, the protruding part 29 of the fitting piece 26 is fittingly fixed into the recessed part 27 of the side edge of the plate body 23, and the leg part 31 of the fitting piece is fixed to a form as carpentry at the time of constructing the form. After placing concrete, the slit fitting piece 26 is removed along with the form leaving the slit member 22 so as to be reused. Work is thereby performed efficiently, and the cost can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earthquake resistant slit material.

[0002]

2. Description of the Related Art In the event of an earthquake, the waist wall, which is often used in reinforced concrete structures, increases the bending resistance of beams and columns, while at the same time causing shear fracture of columns and eventually brittle fracture. is there. For this reason, in recent years, walls have been positively separated from the columns by using earthquake-proof slit materials.

As described above, when the earthquake-proof slit material is used, a space is provided between the wall and the pillar, and the space is completely separated. (Hereinafter, referred to as full penetration type) Not only the space between the wall and the pillar is completely cut, but only the both ends are separated leaving about 1/6 or less and 10 cm or less of the width of the pillar.
(Hereinafter referred to as cross-section defect type).

FIG. 7 shows an example of a conventional cross-sectional missing type earthquake-proof slit material. The conventional earthquake-proof slit material 1 is composed of, for example, an angle 2 having an L-shaped cross section formed of vinyl chloride and a foamed polyethylene 3 attached to one side of the angle 2. Then, the slit material 1 is a nail 5 that is driven from the inner surface side into the inside of the form 4 that forms one wall of the concrete placing space.
It is fixed by. Then, concrete is poured into the concrete placing space formed between the formwork 4 and the other formwork (not shown), and the concrete wall 6 is constructed therein. After the concrete wall 6 is constructed and cured for a predetermined time, the formwork 4 is removed. Then, a non-concrete placing space is formed in the concrete wall 6 by the foamed synthetic resin. As a result, the transmission of vibrations to the columns connected to the concrete wall 6 is blocked, and it is possible to withstand the impact of an earthquake.

FIG. 8 shows an example of a conventional all-through type seismic resistant slit material. This slit material 1
0 is a plate-shaped foamed polyethylene 11 and a support 1 having a substantially U-shaped cross section for supporting the foamed polyethylene 11 on both sides.
The support 12 is provided with a recess 12a having a U-shaped cross section in the extending direction thereof. Then, such a slit material 10 is passed so as to completely traverse between the molds 13 and 14 on which the concrete is placed as shown in the drawing, and as shown in the drawing, the discontinuous portion of the concrete made of foamed polyethylene. Will be formed.

[0006] The slit material 10 of the conventional example is formed into molds 13 and 14
As the work to be passed in between, first, one support 12 is nailed to the form 13, and the form 13 to which this support 12 is attached is erected. It should be noted that the support 12 is attached to the form 1
In the case of attaching to the mold 3, a plurality of nails are to be hammered into the formwork 13. The nailing work is performed from the inside of the formwork 13 with the formwork 13 lying sideways, that is, facing the concrete placing space. It is done from the side to do.

Next, the other support 1 is attached to the other formwork 14.
2 is attached. Also in this case, the mold 14 is to be laid down in a horizontal state and the work is to be performed. In this case as well, the work of nailing the mold 14 is performed from the inside of the mold 14, that is, by placing concrete. It is performed from the side facing the space. In this way, the other supporting member
When 2 is attached, this form 14 is also raised to form a space for placing the concrete wall 16.

After the pair of molds 13 and 14 have been built, the plate-shaped foamed polyethylene 11 formed separately from the support 12 is carried to above the molds 13 and 14, and is then moved upward. From below, the expanded polyethylene 11 is inserted into the recesses 12a, 12a of the supports 12, 12.
In this way, the foamed polyethylene 11 is inserted into the recess 12a,
By sufficiently guiding the foam polyethylene 11 to the lower side, both ends of the foamed polyethylene 11 are sandwiched between the supports 12 and 12, and the installation work of the slit material 10 in the concrete pouring space is completed.

[0009]

By the way, in the conventional earthquake-proof slit material 1 shown in FIG. 7, the angle 2 made of vinyl chloride or aluminum is fixed in the concrete pouring space only by fixing it with the plurality of nails 5. As the concrete is poured into the concrete placing space, the angle 2 and the like may fall sideways due to the pressure. In order to prevent such a problem, the slit material 1 must be further reinforced with a separator or a reinforcing bar, which requires extra parts and labor. Moreover, if these reinforcements are not performed accurately, a problem such as a large deviation in the attachment position of the slit material 1 will occur.

Further, in the case of the earthquake-proof slit material 1, when the mold 4 is removed, the tip of the nail fixing the angle 1 is exposed from the concrete wall 6, and the tip of the nail is newly added. The cutting process had to be done, which required a lot of work.

Further, in the case of the slit material 10 shown in FIG. 8, similarly to the case of the slit material 1 shown in FIG. 7, the foamed polyethylene 11 may be blown off by the pressure of the concrete. Further, there is a problem that the mounting posture of the slit member is bent even when the slit member is not blown by the pressure of the concrete. Therefore, even in the case of this slit material, it is necessary to reinforce it with a separator or a reinforcing bar.

Further, when the support 12 is made of vinyl chloride like the slit material 10, the adhesion between the vinyl chloride and the concrete is poor, so that the concrete wall provided with the earthquake-proof slit material 10 is provided. In No. 16, there was also a problem that rainwater leaked from the outside to the inside.
And even if you need to repair concrete,
Since the adhesion of concrete to vinyl chloride is poor, there is a problem that sufficient reinforcement cannot be achieved.

Further, as described above, the expanded polyethylene 1
In the case of mounting 1, the bottom corners of the foamed polyethylene 11 are first positioned so as to be inserted between the recesses 12a, 12a of the supports 12, 12, and the foamed polyethylene 11 is prevented from bending in this state. However, in practice, it is difficult to mount the two support bodies 12 in parallel without shifting to the left and right. Support 1 in a narrow space
Accurate mounting on the 2 and 12 was time-consuming and laborious.

Therefore, the work for installing such a slit material requires special labor in addition to general carpentry work, and labor and wages for it must be secured, resulting in high cost. There was a problem.

In view of the above problems, the present invention can be easily installed by attaching the slit body as a part of carpentry work without requiring special labor, and moreover, the mounting posture is bent or the concrete is blown by concrete pressure. It is an object of the present invention to provide an earthquake-resistant slit material that can be constructed with a small amount of material by reusing a part of the members repeatedly during the construction, without being damaged.

[0016]

In the earthquake-proof slit material according to the present invention for achieving the above object, a joint portion between a wall surface of a concrete building and a column erected in the middle or a corner of the wall surface. A seismic-resistant slit material having a foamed synthetic resin that is vertically extended in the vicinity, wherein the foamed synthetic resin is adhered to one or both sides of a plate-shaped body that serves as a core material, and at least one of the plate-shaped bodies. A concave portion or a convex portion is formed at the side edge of the plate, and the plate-shaped body is arranged so as to traverse in the vertical direction in the concrete placing space in the vicinity of the joint between the wall surface and the column. A slit body that is embedded in a concrete wall after placing concrete in the setting space and a positioning portion for a form forming the concrete placing space, and further is a recess formed in the plate-like body Well The projection or recess is removably fitted to the convex portion is formed, the positioning portion is characterized by comprising a slit mount piece to be mounted is abutted to the mold.

[0017]

According to the present invention having the above-described structure, the slit main body made of the plate-shaped body and the foamed polyethylene can be inserted into the slit attachment piece straight and detachably from the front direction, for example. Further, when the positioning portion of the slit mounting piece is butted against the mold, the slit mounting piece is positioned. Furthermore, since the slit body is securely fixed by matching the concave portion and the convex portion of the slit body and the slit mounting piece, the slit body can be moved or skipped by concrete pressure. To be prevented.

Moreover, the work of mounting the slit mounting piece can be carried out during the work of extending the form in the width direction, and can be easily carried out as a part of carpentry work without requiring special labor. .

Further, after the concrete is poured into the concrete placing space, the slit mounting piece can be removed together with the form by removing the form. Therefore, by removing the slit mounting piece from this form, the slit mounting piece can be diverted and used in another place,
It contributes to the reduction of material cost. Further, since it is not necessary to cut the nail fixing the slit attachment piece, it does not take time and contributes to cost reduction.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded view of an earthquake-resistant slit material according to an embodiment of the present invention, and particularly shows a full-through type earthquake-resistant slit material. Further, FIG. 2 shows a formwork used when the seismic slit material of FIG. 1 is attached.

The earthquake-proof slit material 22 of this embodiment comprises a slit body 25 in which foamed synthetic resins 24, 24 (only one side is shown) are adhered to both surfaces of a plate-like body 23 which is a core material, and the slit body 25 of the slit body 25. It is composed of two slit attachment pieces 26, 26 which are detachably attached to both side edges.

The plate-like body 23 of the slit body 25 and the slit mounting pieces 26, 26 are both made of hard vinyl chloride. Further, the foam synthetic resin 24, 24 attached to the plate-like body 23 is made of an independent foam such as polyethylene. However, they may be formed of any material.

Slit body 25 and slit mounting piece 2
The cross-sectional shapes of both 6 and 26 are substantially constant, and the recessed portions 27 and 27 are formed over the entire side edges of the slit body 25. Further, on one side edge of the slit mounting piece 26, a convex portion 29 that is detachably fitted into the concave portion 27.
Is projected. Further, a fine groove is formed in the concave portion 27, and a protrusion that is locked to the fine groove is formed in the convex portion 29.

Further, on the slit mounting piece 26, a bulging portion 30 having a trapezoidal cross section for supporting the convex portion 29 is continuously extended from a flat leg portion 31. Such a bulge 3
In the slit attachment piece 26 provided with 0, a substantially T-shaped positioning portion 32 is formed at the meeting portion between the leg portion 31 and the bulging portion 30, and the slope of the bulging portion 30 is separated from the concrete surface. Tapered surfaces P, P for improving the mold are formed.

Seismic slit material 2 thus formed
2 is installed vertically in the vicinity of the joint between the wall and the pillar. On the other hand, as shown in FIG. 2, the formwork forming the concrete placing space for constructing the pillars is arranged so as to face one formwork 33 having a U-shaped cross section and the concave part of this formwork 33. And a flat plate-shaped frame 34.
It should be noted that a plurality of flat plate-shaped molds 34 are arranged adjacent to the plate-shaped molds 34 in the width direction. A concrete pouring space S is formed between the molds 33 and 34, and concrete is poured later. Crosspieces 35, 35 are preliminarily attached to both ends of the U-shaped mold 33 on the outer sides thereof. Further, the crosspieces 35, 35 are attached to both ends of the plate-shaped mold 34.

When the molds 33 and 34 are arranged so as to face each other as shown in FIG. 2, as shown in FIG.
Earthquake-resistant slit material 22 assembled in advance from the side of 4
Is arranged so as to traverse the casting space S, and the positioning member 32 of the slit mounting piece 26 is brought into contact with the slab 35 to position the slit member 22. After that, the earthquake-proof slit material 22 is fixed to the molds 33 and 34 with a plurality of nails 36 and the like. In addition, the slit mounting piece 2 is attached to the slit body 25.
When assembling 6, the convex portion 2 of the slit mounting piece 26
9 may be inserted straight into the recess 27 of the slit body 25 from the front as shown in FIG. As a result, an elastic force acts between the concave portion 27 and the convex portion 29, and the protrusion of the convex portion 29 engages with the narrow groove in the concave portion 27, so that it is easy to mount and prevents the loosening. To be done.

Further, the frame 33 of the earthquake-proof slit material 22,
Since the attachment work to the 34 is only required to drive the nails 36 to the molds 33 and 34, the work can be easily performed without requiring special work as carpentry work.

As shown in FIG. 3, seismic resistant slit material 2
After the 2 is attached in the vertical direction by the plurality of nails 36, the form frames 37, 38 and the like are abutted and attached sideways, as shown in FIG. At this time, the slit mounting piece 26
Since the legs 31, 31 are sandwiched between the molds 33 and 38 and between the molds 34 and 37, the slit body 25 is securely fixed. Therefore, even if an external force is applied to this portion, the position of the slit member 22 is not deviated.

When the predetermined bar arrangement and the like are completed, concrete is poured into the concrete placing space S constituted by these molds. Even if concrete is poured in this way, since both ends of the slit mounting piece 26 are sandwiched between the adjacent formwork as described above and are securely fixed,
The pressure of the concrete does not dislocate it or cause it to fly. After that, after the prescribed time of curing,
The molds 33, 34, etc. are dismantled. In this way, the formwork 33, 3
When removing 4 etc., the taper surfaces P, P promote the release from the concrete surface, so the slit mounting pieces 26, 26
Can be easily removed from the slit body 25.
As a result, as shown in FIG.
And the concrete columns 39 will be constructed. At this time, the slit body 25 is embedded in the concrete block as a cushioning material, but the two slit attachment pieces 26, 26 supported by the crosspieces 35, 35 of the formwork 33, 34 are disassembled. It will be removed together with the molds 33, 34 and the like to be removed. Therefore, by removing the slit mounting pieces 26, 26 from the formwork 33, 34, the removed slit mounting pieces 26, 26 are diverted to another place, for example, when constructing an upper floor of a building. It can also be used.

A caulking material is appropriately filled in the groove D formed in the concrete wall from which the slit attachment pieces 26, 26 have been removed. As a result, there are no problems such as water leakage.

As described above, according to this embodiment,
Slit body 25 and slit mounting pieces 26, 2 on both sides
6 is detachably attached by engaging the concave portion 27 and the convex portion 29, so that it can be easily attached and detached.
Further, unlike the conventional structure, the synthetic resin foam is not inserted from the upper side to the lower side into the support body, so that the foam synthetic resin is bent due to the poor mounting state of the support body as in the conventional case. It will not be buried.

As described above, according to this embodiment, the workability of attaching the slit member 22 is extremely good, and the slit member 22 is not positioned during installation. Similarly, when pouring concrete, the slit material 22
Are not moved or skipped. That is, the slit mounting pieces 26, 26 on both sides are first fixed to the mold by matching the positioning portion 32 of the slit mounting piece 26 with the crosspiece of the mold. Then, the convex portions 29, 29 formed on the slit attachment pieces 26, 26 are
Since it is inserted into the recessed portions 27, 27 of the slit body 25, even when concrete is poured into the concrete placing space, the slit material 22 does not move or fly.

Further, in the above embodiment, the slit body 25
A concave portion 27 is formed on the slit mounting piece 26 and the convex portion 2 is formed.
9 is formed, the convex portion 29 may be formed on the slit body 25 and the concave portion 27 may be formed on the slit attachment piece 26. Even in this case, the mounting workability is good, the position does not shift, and the slit mounting piece 26 can be diverted. Furthermore, in the above embodiment, the foam synthetic resin 24 is adhered to both sides of the slit body 25 as a cushioning material, but the foam synthetic resin 24 may be adhered to only one side.

In the above embodiments, the present invention has been described as a full-penetration type earthquake-proof slit material, but the present invention can also be applied to a cross-section defect type slit material. Figure 6
Shows a cross-sectional defect type earthquake-proof slit material 40.

The seismic-resistant slit member 40 has a plate-like foam synthetic resin 50 such as polyethylene adhered to substantially the entire surface on one side of a long plate-like member 41 having a substantially h-shaped cross section and made of hard vinyl chloride or the like. Slit body 42 and this slit body 4
2 and a slit mounting piece 43 having a substantially T-shaped cross section, which is made of hard vinyl chloride or the like and which can be detachably mounted and can be later removed and diverted to another place. The plate-like body 41 of the slit body 42 is formed with a concave portion 44,
The slit mounting piece 43 is composed of a convex portion 45 that is detachably fitted into the concave portion 44, and a flat positioning portion 47 that positions on the mold 46.

In such an earthquake-proof slit material 40, first, as shown in FIG. 6A, the positioning portion 47 of the slit attachment piece 43 is applied to the form 46, and the slit attachment piece 43 is attached to the plurality of nails 48. It is fixed to the form 46 with. Nail 4
8 are struck on both sides of the convex portion 45 at predetermined intervals.

In this way, the slit mounting piece 43 is formed on the mold 4
After being fixed to 6, the slit main body 42 is attached to the slit attachment piece 43 as shown in FIG. This mounting work can be performed before the mold 46 is built up, as in the above-described embodiment, and since the projection 45 can be inserted into the recess 44, the mounting is extremely easy. Further, since the convex portion 45 and the concave portion 44 are engaged with each other and the foam synthetic resin 50 is brought into contact with the positioning portion 47, there is no positional misalignment or lateral misalignment.

When the slit material 40 is fixed to the one mold 46 in this way, the mold 46 is erected and then the other mold 49 is erected. From this state,
Concrete is placed in the concrete placing space S between the pair of molds 46, 49.

After the curing for a predetermined time, as shown in FIG. 6C, the mold 46 and the like are removed from the concrete wall 51. By removing the form 46 in this manner, the slit attachment piece 43 attached thereto is also removed. Therefore, if the slit mounting piece 43 is further removed from the mold 46, the slit mounting piece 43 can be diverted to another place for use.

Further, the slit body 42 provided with the foamed synthetic resin 50 is directly embedded in the concrete wall 51 to form a non-concrete pouring space, acts as a cushioning material, and exerts a force from the wall 51 to the pillar 52. Transmission is reduced.

Seismic-resistant slit member 4 thus formed
By passing 0 near the joint between the wall 51 and the pillar 52, even if a large vibration is applied to the wall 51 due to an earthquake or the like,
A large force is not transmitted to the pillar 52, and the pillar 52 is prevented from being broken.

The earthquake-proof slit material 40 shown in FIG.
Then, the slit mounting piece 43 is formed in a substantially T shape, but instead of this, the slit mounting piece 2 shown in FIG.
It can also be formed as shown in FIG. 6 and used in combination with the slit body 42.

The examples of the case where the seismic-resistant slit material according to the present invention is applied to the full penetration type and the case where the sectional-defective type is applied have been described above. In this case, the work of inserting the foam synthetic resin from above into a narrow area sandwiched by two molds facing each other becomes unnecessary. Moreover, the positioning portion of the slit mounting piece is abutted and fixed to the frame. Further, since the slit attachment piece and the slit body are locked by the detachable concavo-convex connection, the concrete will not be misaligned or skipped even when poured. Moreover,
There is no need to perform complicated positioning, and nailing can be done outside the formwork, so the work is extremely simple and no special labor is required.

[0044]

As described above, according to the earthquake-proof slit material of the present invention, it is not necessary to install the earthquake-proof slit material from the inner side of the mold. Also, since the slit mounting piece can be fixed to the formwork, and further the slit body can be attached to the slit mounting piece to build up the formwork, it can be done as a simple carpentry work, and it requires no special effort. It doesn't have to cost. Therefore, working efficiency is further improved.

Moreover, in the case of the all-through type, it is sufficient to fix the pier of the form by nailing it from the outside of the form.
Workability is further improved. Moreover, since the slit mounting piece is fixed in a state of being sandwiched between the two molds, the fixing is reliable. In addition, since the earthquake-proof slit material is composed of the part that is embedded in the concrete wall and the part that is removed together when the formwork is removed, the part that is removed can be reused, and in terms of cost. It is advantageous.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an essential part of an earthquake-resistant slit material adopted in an embodiment of the present invention.

FIG. 2 is a partial perspective view of a frame to which the earthquake-proof slit material of the embodiment is attached.

FIG. 3 is a perspective view showing a state in which the seismic slit material of FIG. 1 is attached to the form shown in FIG.

FIG. 4 is a perspective view showing a state where the form frame is further extended to the form frame to which the earthquake-proof slit material is attached.

FIG. 5 is a perspective view after placing concrete in a concrete formwork and disassembling the formwork.

FIG. 6 (a) is a sectional view showing a construction procedure when constructing a wall by adopting an earthquake-resistant slit material according to another embodiment of the present invention, and FIG. 6 (b) is the same embodiment. 6C is a cross-sectional view showing a state in which the earthquake-resistant slit material according to FIG.
[Fig. 3] is a cross-sectional view when the earthquake-proof slit material according to the example is installed, concrete is poured, and the formwork is disassembled.

[Fig. 7] Fig. 7 is a cross-sectional view when a concrete wall is cast by a conventional earthquake-proof slit material.

[Fig. 8] Fig. 8 is a cross-sectional view of another conventional example in which a concrete wall is placed by using an earthquake-resistant slit material.

[Explanation of symbols]

 22, 40 Seismic slit material 23, 41 Plate-like body 24, 50 Foam synthetic resin 25, 42 Slit body 26, 43 Slit mounting piece 27, 44 Recessed portion 29, 45 Convex portion 32, 47 Positioning portion 35 Pierce 36 Nail 38 , 51 Walls 39, 52 Pillars S Concrete placing space

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masao Ishii 71-1-410 Nogawa, Miyamae-ku, Kawasaki-shi, Kanagawa

Claims (1)

[Claims] 1. A seismic-resistant slit material provided with a synthetic resin foam vertically extending near a joint between a wall surface of a concrete building and a column standing upright in the middle or corner of the wall surface. , A synthetic resin foam is attached to one or both sides of a plate-shaped body to be a core material, and at least one side edge of the plate-shaped body is provided with a recess or a protrusion, and the plate-shaped body is provided on the wall surface. And a slit body which is arranged so as to traverse in the vertical direction in the concrete placing space near the joint with the pillar, and which is embedded in the concrete wall after placing concrete in the concrete placing space, A positioning portion is formed on the formwork that forms the concrete placing space, and a convex portion or a concave portion that is detachably fitted to the concave portion or the convex portion formed in the plate-shaped body is formed, and Positioning part Seismic slit material characterized by comprising a slit mount piece to be mounted is abutted detachably to the formwork.