JP2001323656A - Form spacer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a form spacer facilitating a position adjustment of a mounted form, capable of simply positioning the lower horizontal reinforcement of lattice reinforcing bars at a position below the upper face of horizontal section concrete, and having the cross sectional area of members smaller than that of the conventional one. SOLUTION: Right and left legs 9 and 10 are erected at both end sections of a substrate 8, and receiving plates 11 and 12 are fixed to the apexes of the legs. The height of the legs 9 and 10 is made nearly equal to the thickness size of the horizontal section concrete, and the interval between the receiving plates 11 and 12 is made nearly equal to the interval between right and left erect section forms 20 and 21. A slip section 14 is provided at a position lower than the height of the legs at the middle section of both legs to form the form spacer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spacer for forming a space by supporting a solid foundation and a lower portion of a formwork for an upright portion when constructing a foundation of a house.

[0002]

2. Description of the Related Art In recent years, as a foundation for a detached house, a solid foundation covering the entire area under the floor with horizontal concrete and an upright portion formed widely by taking a wide range of footings have become widespread. These foundations consist of an upright section and a horizontal section integrally formed at the lower end (horizontal concrete for solid foundations, footing for upright sections), but usually rebars for horizontal concrete and vertical concrete are provided. After assembling, the procedure is to assemble the upright formwork and cast concrete into it. At that time, it is preferable that the lower part of the upright part concrete and the horizontal part concrete are hardened integrally, so when assembling the formwork of the upright part, place a spacer or block for formwork under the formwork for upright part. The formwork is lifted by the thickness of the horizontal concrete.

However, the prior art focuses only on the function of lifting the formwork, and does not take much into account the positional adjustment of the lifted formwork in the front-rear and left-right directions and the relationship with the arrangement of reinforcing bars arranged inside. For this reason, the only way to adjust the position of the mold placed on the spacer to the front, rear, left and right is to lower the mold once and change the position of the spacer, or change the position of the entire spacer. In addition, since the spacer is usually in the shape of a gate and the upper side is connected horizontally, if the upper, middle, and lower horizontal reinforcing bars are combined with vertical reinforcing bars in advance on the grid, Since the lower horizontal reinforcement collides with the horizontal portion of the form spacer, the lower horizontal reinforcement cannot be incorporated as a part of the horizontal concrete reinforcement.

That is, the lower horizontal reinforcing bars cannot be arranged lower than the upper surface of the horizontal concrete because of the form spacers. On the other hand, in the case of a solid foundation or a cloth foundation, it is preferable that the reinforcement for the horizontal part concrete and the reinforcement for the upright concrete are connected structurally. When using a braided structure (referred to as a lattice reinforcing bar), it is preferable that the position of the lower reinforcing bar can be easily positioned at approximately the middle position of the thickness dimension in the horizontal concrete. In addition, conventional spacers for formwork are mainly made of a frame having a U-shaped cross section by sheet metal processing, which is relatively expensive as a member to be buried in the foundation, and from the viewpoint of the strength of the foundation, Preferably, the cross-sectional area of the frame is reduced.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a formwork spacer, in which the position of a placed formwork can be easily adjusted and the lower horizontal reinforcing bar of the grid reinforcing bar is positioned below the upper surface of the horizontal concrete. Another object of the present invention is to provide a spacer which can be easily positioned and has a smaller cross-sectional area of a member than a conventional one.

[0006]

SUMMARY OF THE INVENTION A form spacer is basically composed of a substrate, left and right legs, a form receiving portion and a reinforcing bar receiving portion. The left and right legs have a height approximately equivalent to the thickness of the concrete in the horizontal part, and a form receiving part is provided at the top. The legs are often formed by bending stainless steel or rust-proofed bar steel, and the base is fixed to a substrate that is a press-formed product such as a steel plate. The distance between the left and right legs is set so that the opposing distance of the form receiving portion provided at the top thereof is substantially equal to the left and right distance of the upright part form frame to be supported. The reason why the term "substantially" is used is that the receiving plate actually receiving the left and right formwork has dimensions in the left-right direction, and the legs may be integrated with the receiving plate within that range.

[0007] The form receiving portion is constituted by the left and right receiving plates and the width stopper disposed over the receiving plates. The receiving plate is a molded product of stainless steel or a steel plate, and has a flat groove shape with rising walls on the front and rear sides. The width stopper is for determining the interval between the right and left upright formwork, and has a width dimension capable of being fitted into the groove-shaped portion of the receiving plate and moving left and right. have. The direction of the regulating protrusion is the front-back direction, and the lower end of the upright portion formwork can be guided in the front-rear direction.

[0008] The mounting slip portion is disposed at an intermediate position between the left and right legs and at a height almost half of the height of the legs. In practice, a flat slip steel plate with which a reinforcing bar abuts is often mounted at the middle in the left-right direction of a holding member having both ends supported by left and right legs. The longitudinal length of the slip steel plate is set to be longer than the interval between the irregularities in the longitudinal direction of the different-diameter steel bar that is often used as a reinforcing steel bar. This is to prevent the mounting slip portion from being caught. A round chamfer may be formed on the front and rear sides of the slip steel plate in order to further reduce the occurrence of the catch when the different diameter steel bars move. The slip steel plate is also used for positioning when arranging the lattice reinforcement for upright concrete. That is, by placing the lower horizontal reinforcing bar on the upper surface of the slip steel plate, the vertical position of the grid reinforcing bar can be determined, and the lower horizontal reinforcing bar is located at a position lower than the upper surface of the horizontal concrete. Reinforcement and horizontal concrete reinforcement are structurally integrated. In addition, the holding members on both the left and right sides of the slip steel plate may be formed to be inclined at a low angle toward the slip steel plate so as to be easily formed on the slip steel plate so as to easily place the grid reinforcement for the upright portion concrete on the slip steel plate.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a state in which reinforcement has been completed in order to construct a solid foundation, in which a form spacer 1 supports a grid reinforcement 2 pre-assembled in a lattice for upright concrete. I have. Reference numeral 3 denotes a reinforcing bar for horizontal concrete. The lattice reinforcing bar 2 is formed by connecting an upper horizontal reinforcing bar 4, a middle horizontal reinforcing bar 5, and a lower horizontal reinforcing bar 6 to a grid by a plurality of vertical reinforcing bars 7. The lower horizontal reinforcing bar 6 is located near the lower end of the vertical reinforcing bar, and is a part of the reinforcing bar arrangement in the horizontal concrete. Reinforcing bars use different diameter steel bars.

The form spacer 1 is provided with legs 9 and 10 fixed to the substrate 8 and on both sides thereof at intervals.
10 is provided with receiving plates 11 and 12 fixed to the top of each, a width stopper 13 and a mounting slip portion 14 disposed between the left and right legs 9 and 10, and the whole is subjected to rust-preventive treatment. The substrate 8 is formed by press-forming a steel plate (0.8 mm in thickness), has a width (70 mm) and a horizontal dimension (260 mm), and has a size that allows it to stand on its own even when the legs 9, 10 and the like are attached to the upper part. The substrate 8 is formed with a concave portion at the left and right portions where the narrow peripheral portion and the bases of the legs 9 and 10 are fixed, and a central portion as a concave portion, and the other portions are formed to be convex to increase the strength against bending and twisting. A through hole 10 is formed in the central concave portion, and the form spacer 1 can be stabilized using a long nail or pin. However, it may not be used on site.

The legs 9 and 10 are each formed by bending a round bar (φ6 mm) into a U-shape and fixing both open ends to the substrate 8 by welding. A reinforcing member 16 is disposed between the legs 9 and 10 and the substrate 1. is there. Receiving plates 11 and 12 fixed to the tops of the legs 9 and 10
Is press-formed from the same steel plate as the substrate 8 and has rising walls 17 and 18 on the front and rear sides, and has a flat groove shape (lateral dimension 60 mm, longitudinal dimension 38 m).
m). Each is fixed to the top of the legs 9 and 10 by welding. The width stopper 13 is provided with regulating projections 22 and 23 at both ends of the connecting plate 19 for positioning the lower ends of the upright form frames 20 and 21 (FIG. 3). The width (dimension in the front-rear direction) of the connecting plate 19 is smaller than the width of the receiving plates 11 and 12, and is divided at the center to select the overall left-right dimension.
It can be fixed.

The mounting slip part 14 is a flat slip steel plate 24 (front-back dimension: 40 mm, left-right dimension: 20 mm,
2.3mm thick) and holding member 25 (6mm round steel bar)
The slip steel plate 24 is fixed to the holding member 25 by welding, and both ends of the holding member 25 are fixedly attached to the intermediate portions of the left and right legs 9 and 10. Note that the holding member 25 has a guide portion 26 that is inclined low toward the slip steel plate 24 near the slip steel plate 24. The longitudinal dimension 40 mm of the slip steel plate 24 is larger than the interval between the protrusions 27 (FIG. 2) of the different-diameter steel bars.

When constructing the solid foundation, reinforcing bars 3 for the concrete in the horizontal part are made based on the position of the upright part (set) which is inked (set) on the ground (FIG. 1). Along the length of one unit of the upright formwork 20, 21, at least two formwork spacers 1 are arranged along the entire length of the upright to be constructed (FIG. 1), from which the upright concrete is placed. Grid reinforcement 2 is placed on the placement slip portion 14 of the form spacer 1. At this time, lattice reinforcement 2
The lower horizontal reinforcing bar 6 is guided by the guide portion 27 and can be easily mounted on the slip steel plate 24. Thereby, the vertical position of the lattice reinforcing bar 2 is determined. The front-rear position (the longitudinal direction of the reinforcing bars) of the lattice reinforcing bar 2 can be adjusted by moving the steel plate 24 so as to slide while the lower horizontal reinforcing bar 6 is placed on the form spacer 1. At that time, slip steel plate 2
Since the length of 4 is larger than the interval between the protrusions 27 of the different diameter steel bars, and the front and rear sides of the slip steel plate 24 are rounded, they can be moved without being caught.
The lattice reinforcing bars 2 for upright concrete are self-supported by being connected to each other in the longitudinal direction and forming a corner by the connection.

Next, the receiving plate 1 of the spacer 1 for each formwork
The width-stopping material 13 is put over the first and the second 12 and the upright part forms 20, 21 are inserted thereover, and the upper parts of the forms 20, 21 are also joined by the width-stopping material 13 (FIGS. 3, 4). The width stopper 13 is
The left and right dimensions are adjusted to the set values in advance and fixed. In addition,
The width stopper 13 can be moved to the left and right with respect to the spacer 1 for the formwork, and
1 can move back and forth, so the left and right upright section formwork 2
Even after setting 0 and 21, the formwork 2 as a unit
Before joining 0 and 21 back and forth, it is possible to finely adjust the position of an entire unit of the set upright form frames 20 and 21. Thereby, the left and right upright section form frames 20,
21 can be arranged at a position centered on the lattice reinforcing bar 2.

In FIGS. 3 and 4, reference numeral 28 denotes an anchor bolt, which is arranged to tighten the base. Sign 2
9 is an anchor help, and the right and left upright form forms 20, 21 are provided.
Is a member for determining the position of the anchor bolt 28 by being placed on the upper surface. After setting the reinforcement and the formwork, fix the set state sufficiently using so-called flap materials or formwork fixing materials.First, cast concrete from the upright side, and then hit the horizontal concrete. Set up. As a result, the upright concrete 29 and the horizontal concrete 30
The solid foundation (Fig. 4), which is structurally integrated from above the bar arrangement, is completed.

[0016]

According to the present invention, the lower horizontal reinforcing bar for the upright concrete is arranged as a part of the reinforcement of the horizontal concrete while functioning as a formwork spacer for placing the upright concrete and the horizontal concrete together. Can be
The foundation formed by casting the horizontal concrete and the upright concrete integrally can have high strength. The lattice reinforcement can be arranged at an appropriate position only by placing the reinforcement for the upright concrete having the lower horizontal reinforcement on the placing slip portion of the form spacer. Further, even if the bars are of different diameters, they can be smoothly moved back and forth without being caught by the slip steel plate. Even after setting the left and right formwork on the formwork spacer, the set formwork can be adjusted in front, rear, left and right. The cross-sectional area of each part constituting the spacer for formwork is small, and the strength of the foundation formed by casting the horizontal part concrete and the upright part integrally is less likely to be reduced by the formfill spacers. Further, an inexpensive structure using a steel bar can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing a state of bar arrangement.

FIG. 2 is a perspective view of a formwork spacer.

FIG. 3 is a front view showing a state in which a mold for an upright portion is set.

FIG. 4 is a perspective view showing a state in which a mold for an upright portion is set.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Form spacer 2 Grid reinforcement 3 Reinforcement of horizontal concrete 4 Upper horizontal reinforcement 5 Middle horizontal reinforcement 6 Lower horizontal reinforcement 7 Vertical reinforcement 8 Substrate 9 Left leg 10 Right leg 11 Receiving plate 12 Receiving plate 13 Width stopper Fixture 14 Mounting slip part 15 Through hole 16 Reinforcement member 17 Rising wall 18 Rising wall 19 Connecting plate 20 Upright formwork 21 Upright formwork 22 Regulatory projection 23 Regulatory projection 24 Slip steel plate 25 Holding member 26 Guide part 27 Convex Part 28 Anchor bolt 29 Upright concrete 30 Horizontal concrete

Claims (5)

[Claims] 1. A spacer for a concrete foundation formed by simultaneously casting an upright portion concrete and a horizontal portion concrete, comprising a substrate, left and right legs, a receiving plate provided at the top of the leg, a width stopper, and a leg. It has a mounting slip part arranged at almost half the height of the height, and the left and right legs have a height approximately equivalent to the thickness of the horizontal concrete,
The opposing interval of the receiving plate at the top is provided on the substrate at an interval substantially equal to the width of the upright concrete, and the mounting slip portion is located at a position lower than the height of the leg between the left and right legs. A featured spacer for formwork. 2. The width stopper has guide protrusions at both ends for guiding the lower end of the formwork in the front-rear direction and for determining an interval between the left and right formwork, and is disposed so as to be slidable in the left-right direction with respect to the receiving plate. The spacer for a formwork according to claim 1, wherein the spacer is provided. 3. A mounting slip portion is provided with a flat slip steel plate with which a reinforcing bar abuts in the left-right middle of a holding member having both ends supported by left and right legs, and the slip steel plate is provided with unevenness in the longitudinal direction of a bar having a different diameter. The mold spacer according to claim 1, wherein the spacer has a plane having a dimension in the front-rear direction longer than the interval. 4. The spacer for a formwork according to claim 3, wherein the holding members on the left and right sides of the slip steel plate are formed in guide portions which are inclined downward toward the slip steel plate. 5. The spacer according to claim 1, wherein the legs and the holding member are formed by bending a bar steel.