JP4627593B2 - Horizontal slitting material support - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention fixes the horizontal slit material at a predetermined position during the work of assembling the formwork before placing concrete in the construction of the horizontal slit material embedded in the joint between the beam and the non-structural wall in the concrete building. It is related with the support tool for doing.
[0002]
[Prior art]
In recent years, in concrete buildings such as buildings, a method of using a buffer material called a slit material for the purpose of forming a structural slit that becomes a mechanical discontinuity with respect to interlayer displacement at the boundary part such as a column or wall Is spreading. Since this slit material is embedded so as to penetrate the wall or leave a predetermined wall thickness, and the building is divided through the slit material, the shear stress generated in the building when subjected to an external force due to an earthquake By absorbing and relaxing the material with a slit material and blocking its transmission, the building is prevented from shearing and brittle.
[0003]
This type of seismic slit material includes a vertical slit material embedded near the boundary between the waist wall or hanging wall of a reinforced concrete building and a column connected to it, as well as the upper floor of the building. There is a horizontal slit material provided between the wall (non-structural wall) and the beam on the lower floor. And as a prior art example using this horizontal slit material, there exists a thing as described in utility model registration No. 3056727, for example. Here, a pair of slit members formed in a rectangular cross section are arranged such that rainwater from the outside is present at the boundary between the upper end of the lower floor beam and the lower end of the upper wall of the upper floor that constitute a part of the outer wall. In consideration of intrusion, the outdoor side is used in a state of being arranged in a stepped manner so that the corners of each other face each other so that the outdoor side is lower than the indoor side.
[0004]
In the above conventional example, first, a joint rod is nailed horizontally at a predetermined position on the inner surface of the outer mold frame (vertical mold frame), and then the slit material on the lower floor side along the opposite side surface of the joint rod with a headless nail or the like. In this state, concrete is cast up to the upper surface of these, and the lower-level frame is constructed. Next, the upper floor side slit material is placed on the lower floor flooring concrete surface so that the corners of the lower floor floor side abut each other, and concrete is placed on the upper part thereof. The outer wall of the upper floor is constructed. By adopting such a configuration, in the construction of the outer wall of the upper floor, it becomes possible to secure a wide space between the side surface of the upper slit material and the outer mold, and as a result, the filling property of concrete is improved, Cracks at the lower end of the outer wall of the upper floor, which has been a problem until now, are less likely to occur.
[0005]
[Problems to be solved by the invention]
By the way, in order to fix the slit material on the lower floor side to the joint rod, the headless nail is driven from the back side of the slit material so as to reach the outer mold frame through the joint rod while being applied to the joint rod. It is customary. Thereby, when the outer mold is removed, the headless nail is pulled out of the slit material together with the outer mold frame and the joint rod, and only the slit material is left. Since the concrete is cast with the slit material projecting greatly inside the outer mold, the slit material extends along the longitudinal direction so as not to be lifted or displaced due to the pressure of the placed concrete. It is necessary to nail several places. However, since the slit material is only attached to the concrete surface that has been laid, if there are many nailing points, it is dragged by the headless nail when the outer mold is removed, and is pulled out together. In addition, there is still room for improvement in terms of attaching the slit material.
[0006]
The present invention has been made in view of the problems of the prior art, and provides a support tool capable of easily and surely installing a horizontal slit material for earthquake resistance at a predetermined position when placing concrete. Objective.
[0007]
[Means for Solving the Problems]
To solve the above problems, the present invention is horizontally provided along Oite the horizontal junction of the beam and the non-structural wall lower end side, on the inner side of the joint portion formed on the outer surface upper portion of the beam in the longitudinal slit A support member that fixes a material at a predetermined position when placing concrete up to the upper surface position of the horizontal slit material, and a connecting portion that fits into a joint rod on the inner surface of the vertical mold forming the joint portion; And a holding portion for a horizontal slit material extending in the longitudinal direction of the joint rod.
[0008]
According to such a configuration, the horizontal slit member fixed to the holding portion of the support tool by appropriate means such as adhesion is connected to the support tool at the other end surface side of the joint rod fixed to the inner surface of the vertical mold. Since it is fitted through the part, it is securely fixed to the joint rod, and it is not lifted or displaced due to the concrete placing pressure, and its mounting work is easy. Further, when the mold is removed, the fitting state between the joint rod and the connecting portion of the support is easily released, and the horizontal slit material is reliably left on the concrete side together with the support. Furthermore, when a slit material made of a material that is easily deformed, such as a foam material, is fixed to the joint rod with a nail as it is, the unfixed non-fixed portion is pushed upward by the concrete and curved upward, and is linear. However, if the support tool of the present invention is used, the horizontal slit material is held by the holding part of the support tool over its entire length, so it will not be deformed by the concrete placing pressure. Can be installed in a straight line. In addition, although it is only necessary to fit a support tool with respect to a joint rod basically, in the support tool provided with the anchor part mentioned later, it is possible to use the nail together and to raise the fixed strength.
[0009]
In the support device having the above configuration, in order to hold the horizontal slit material in the holding portion, for example, an appropriate means such as sticking with an adhesive tape, use of an adhesive, or forming into a groove shape and inserting into the inside thereof is adopted. be able to. Moreover, what is necessary is just to select the optimal thing according to the shape etc. as a raw material of a support tool, such as a synthetic resin and a metal. In addition, the horizontal slit material which the support tool of this invention makes object should just be a raw material which volume decreases moderately with respect to a compressive force, As a specific example, for example, a calcium silicate board, a calcium carbonate foam material, foamed polyethylene However, the present invention is not limited to this.
[0010]
Furthermore, you may provide the anchor part of an appropriate shape in at least one of the holding | maintenance part of a support tool, or a connection part. In this case, the anchor part greatly resists the pulling force applied to the support and the horizontal slit member when removing the vertical formwork, so compared to the one that depends only on the adhesion to the concrete surface. The fixing strength is greatly increased, and it can be reliably prevented that they are pulled out together with the joint rod.
[0011]
Further, in the present invention, the horizontal slit material provided with a plurality of through holes penetrating in the vertical direction at predetermined intervals along the longitudinal direction is an object, and in addition to the above configuration, the through holes of the horizontal slit materials are provided in the holding portion of the support tool. You may provide the hole connected to. In this case, since these holes play a role of venting air when placing concrete, air does not collect on the back side of the horizontal slit material protruding in the horizontal direction with respect to the vertical formwork. Improves concrete filling. Furthermore, by appropriately selecting the size and arrangement of these holes, it is possible to fill the holes with concrete and to expect an anchor effect.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 and FIG. 2 are an overall view and a longitudinal sectional view showing an application state of a horizontal slit material for earthquake resistance targeted by a support according to the present invention in a concrete building. In FIG. 1, an outer wall 1 that is a non-structural wall is surrounded by columns 2 and 2 on both sides, a beam 3 and a beam 4 on a lower floor, and a vertical slit member 5 is interposed between the outer wall 1 and the columns 2 and 2. However, the horizontal slit material 6 mentioned later is provided between the beams 4 of the lower floor. In this case, as shown in FIG. 2, the horizontal slit member 6 includes a first slit member 7 disposed on the beam 4 side of the lower floor and a second slit disposed on the lower end side of the outer wall 1 of the upper floor. The support 20 which consists of the material 8 and is based on this invention is embed | buried along the longitudinal direction with the 1st slit material 7 inside the joint part 9. FIG.
[0013]
FIG. 3 is a perspective view in which a part of the support 20 is cut and enlarged. The illustrated support 20 is made of a synthetic resin such as polyvinyl chloride, and shares a holding section 21 having an L-shaped cross section for holding the first slit member 7 and a rising wall 21 a of the holding section 21. The connecting portion 22 having a substantially U-shaped cross section provided on the back side of the lever is the basic configuration. And this connection part 22 is used for fitting with the joint rod mentioned later in the case of installation. Furthermore, in this embodiment, the anchor portion 23 is integrally formed obliquely below the horizontal portion 21b of the holding portion 21, and the horizontal portion 21b is provided with a hole 24. A plurality of the holes 24 are provided at predetermined intervals along the longitudinal direction of the support tool 20 as a whole.
[0014]
4 is an enlarged cross-sectional view of the vicinity of the horizontal joint on the lower end side of the outer wall 1 on the upper floor and the upper side of the beam 4 on the lower floor in FIG. Here, the first slit material 7 is made of a material having moderate elasticity such as foamed polyethylene, and only one of them is formed in a trapezoidal shape with an inclined cross section, and a through hole 7a penetrating in the vertical direction is formed in the longitudinal direction. A plurality are provided along. And in the state fixed to the holding part 21 of the support tool 20 according to the present invention, in a longitudinal direction inside the joint part 9 formed at a predetermined position, that is, the outer surface upper end part of the beam 4 on the lower floor forming a part of the outer wall. It is arranged along. Further, the second slit material 8 is between one slit material main body 8b having an inclined surface 8a on the joint portion 9 side and the other slit material main body 8c formed in the rectangular cross section with the same width, An incombustible material 8d such as rock wool is provided, and these are sandwiched from two surfaces by two resin cloth tapes (not shown). The slit material bodies 8b and 8c are both made of foamed polyethylene. And it is juxtaposed on the upper surface of said 1st slit material 7 in the inclined side edge part containing this inclined surface 8a. The angle of the inclined surface 8a is optimally 45 degrees, but is not necessarily limited to this angle, and can be changed as appropriate according to use conditions and the like, and the inclined surface 8a is inclined in a curved shape. Even in the case of the curved surface, there is no great difference in the effect of preventing the occurrence of cracks in the outer wall 1. Incidentally, when the angle of the inclined surface 8a in the second slit member 8 having the width W is 45 degrees, the width ω and the thickness L of the first slit member 7 can be expressed by the following relational expressions, respectively.
ω ≧ W
L ≧ √2W
Further, in this embodiment, an anchor reinforcing bar 10 is embedded through the second slit member 8 between the outer wall 1 of the upper floor and the beam 4 of the lower floor, so that the upper surface side cuts the adhesion of concrete. The bottomed cylindrical plastic cover 11 is covered. Further, the inside of the connecting portion 22 of the support 20 after the joint rod is removed is filled with the caulking 13 material via the backup material 12. In addition, if a water-stopping material such as a butyl rubber sheet is provided on the bottom surface portion adjacent to the inclined surface 8a of the second slit material 8 and the first slit material 7, the waterproof property at the joint portion is further improved.
[0015]
Next, the construction method of the slit material using the said support tool 20 is demonstrated based on FIG. 5 and FIG. First, the joint rod 15 is horizontally fixed to a predetermined position (a position corresponding to the joint portion 9 in FIG. 2 or 4) of the vertical mold (outer mold) 14 with a nail or the like. Next, when the support member 20 in a state in which the first slit member 7 is fixed to the holding portion 21 via an adhesive tape or the like is fitted into the connecting portion 22 from the back side of the joint rod 15, it is easy and reliable. Can be fixed to. If a headless nail is further driven from the inclined surface side of the first slit member 7, the fixing strength is further increased. Alternatively, the first slit member 7 may be attached to the holding portion 21 after only the support 20 is fitted to the joint rod 15. Then, an inner mold is appropriately installed, and the concrete on the lower floor is placed up to the upper surface position of the first slit member 7. In this case, the through-holes 7a provided in the first slit member 7 communicate with the holes 24 of the support tool 20, respectively, and as a result of these functioning as air vent holes, when concrete in the lower floor is placed In addition, air does not accumulate on the back side of the joint rod 15 and the support 20 protruding in the horizontal direction with respect to the vertical mold 14, and a dense filling state is obtained. After the concrete on the lower floor has hardened, place the second slit material 8 at the position shown in Fig. 4 and fix it to the concrete surface of the lower floor (the top of the beam) with adhesive tape, concrete nails, etc. Install the frame and place concrete that will become the outer wall 1 etc. of the upper floor. When the concrete is hardened, the vertical form 14 and the joint rod 15 are removed, the backup material 12 is pushed into the connecting portion 22 of the support 20 embedded in the joint portion 9, and the caulking material 13 is filled outside. To do. Since the support 20 has the anchor portion 23, even when a headless nail is used in combination, it is not pulled out together when the vertical form 14 and joint rod 15 are removed. In addition, when using the 2nd slit material 8 which has the nonflammable material 8d as shown in FIG. 4, or the slit material lacking in fire resistance, what consists of a material rich in fire resistance as the caulking material 13 is applied. Is desirable.
[0016]
In the outer wall structure using the horizontal slit material 6 composed of the two types of slit materials 7 and 8 as described above, when the concrete on the upper floor is placed, the vertical mold 14 and the joint portion of the second slit material 8 are used. Since the concrete is surely filled in the gap with the side surface, the lower end of the outer wall is lower than that of the slit member having the rectangular cross section as in the conventional case even when the second slit member 8 is arranged at a position close to the outer surface of the wall. Cracks at the part are less likely to occur, and water stoppage is sufficiently secured. Moreover, since the 1st slit material 7 below it acts as a shock absorbing material with respect to the inclination part formed in the outer wall lower end surface of an upper floor, the slit width required on structure can be ensured reliably. .
[0017]
6 and 7 are perspective views showing another embodiment of the support according to the present invention.
In the support tool 30 of FIG. 6, the holding | maintenance part 31 of the 1st slit material 7 is formed in the cross-sectional U shape of the space | interval substantially equal to the width | variety. When the first slit member 7 is inserted into the groove-shaped portion, the degree of fixing with respect to the support 30 is further increased. In addition, the connection part 32 other than the holding | maintenance part 31, the anchor part 33, and the hole 34 are the same as that of the support tool 20 of said 1st embodiment. Moreover, in the support tool 40 shown in FIG. 7, the holding | maintenance part 41 and the connection part 42 are the same as that of the support tool 20 of said 1st embodiment, and differ only in the point that the anchor part 43 is formed at right angle. The support tool 40 has a higher resistance to pulling force when the vertical mold 14 is removed than the others.
[0018]
In the above-described embodiment, the example in which the support tool is composed of two types of slit materials as the target horizontal slit material has been described, but of course, the present invention can be applied to other configurations. In short, the support according to the present invention is used when the concrete is placed up to the upper surface position of the horizontal slit material provided inside the joint portion formed at the upper end portion of the outer surface of the beam while being held at a predetermined position of the formwork. Is useful. Further, a hole for venting air, an anchor portion, or the like is not an essential requirement of the present invention, and may be appropriately provided as necessary. Furthermore, the shape, material, and the like of the support are not limited to this, and various modifications can be made within the technical idea of the present invention.
[0019]
【The invention's effect】
As described above, support according to the invention, beams and Oite the horizontal junction of the non-structural wall lower end, a horizontal slit inwardly along the longitudinal direction of the joint portion formed on the outer surface the upper end of the beam When the material is embedded so that the upper surface and the concrete surface coincide with each other, a connecting portion that fits into the joint rod on the inner surface of the vertical mold forming the joint portion, and a horizontal slit material that extends in the longitudinal direction of the joint rod Therefore, when placing concrete, the horizontal slit material can be easily and securely held at a predetermined position without being lifted or displaced. The horizontal slit material is not pulled out at the time of molding, and it is surely left on the concrete side, so that its practical effect is extremely great.
[0020]
Further, when an appropriately shaped anchor portion is provided on at least one of the holding portion or the connecting portion of the support tool, even in the case where a nail is used together to further increase the fixing strength to the joint rod, the vertical formwork It is possible to reliably prevent them from coming out together with the joint rod when demolding. Further, a horizontal slit member provided with a plurality of through-holes penetrating in the vertical direction at predetermined intervals along the longitudinal direction may be targeted, and the holding portion of the support having the above-described configuration may be provided with holes communicating with the through-holes. Good. In this case, since these holes play a role of removing air, air hardly stays on the back side of the horizontal slit member and the like, and the concrete filling property is improved. Furthermore, by appropriately selecting the size and arrangement of the holes, the hole is filled with concrete, and an anchor effect can be expected.
[Brief description of the drawings]
FIG. 1 is an overall view of an outer wall structure showing an application state of a horizontal slit member.
FIG. 2 is a longitudinal sectional view of the outer wall structure shown in FIG.
FIG. 3 is a perspective view of a horizontal slit member support according to the present invention.
4 is an enlarged cross-sectional view of the vicinity of a horizontal joint portion between an outer wall and a beam in FIG. 2;
FIG. 5 is a perspective view showing a use state of the support according to the present invention.
FIG. 6 is a perspective view showing another example of a support according to the present invention.
FIG. 7 is a perspective view showing another example of a support according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Outer wall, 2 ... Column, 3, 4 ... Beam, 5 ... Vertical slit material, 6 ... Horizontal slit material, 7 ... First slit material, 8 ... Second slit material, 8a ... Inclined surface, 9 ... Joint Parts, 10 ... anchor rebar, 12 ... backup material, 13 ... caulking material, 14 vertical formwork, 15 joint rod, 20, 30, 40 ... support, 21, 31, 41 ... holding part, 22, 32, 42 ... Connecting part, 23, 33, 43 ... anchor part, 24, 34 ... hole

Claims (3)

Oite the horizontal junction of the beam and the non-structural wall lower end, a horizontal slit member provided along the longitudinal direction on the inner side of the joint portion formed on the outer surface the upper end of the beam, the upper surface of the concrete the horizontal slit member A support that is fixed to a predetermined position when driving to a position, and is a connecting portion that fits into a joint rod on the inner surface of the vertical mold forming the joint portion, and a horizontal portion that extends in the longitudinal direction of the joint rod A support for a horizontal slit material, comprising a holding member for the slit material. The horizontal slit member support according to claim 1, wherein an anchor portion that resists a pulling force outward from the joint portion is provided in the holding portion or the connecting portion. The said holding | maintenance part provided the hole connected to the said through-hole of the horizontal slit material in which the through-hole penetrated to the up-down direction was provided with two or more along the longitudinal direction. Horizontal slitting material support.

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