JPH0819768B2 - Positioning spike bracket - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a metal fitting used for forming a pipe hole for piping when a concrete layer is formed.

(Prior art and its problems) Conventionally, when a wall surface of a building or the like is concrete-cast and formed, it is necessary to form a pipe hole for piping or the like in the concrete layer. Install the sleeve at the specified position where the piping passes,
Concrete covering was performed after covering with concrete to prevent the concrete from flowing into the sleeve, and when the concrete was solidified, a pipe hole for piping was formed in the concrete layer through the sleeve.

Conventionally, in order to fix the sleeve at a predetermined position, a locating washer, a stud bolt, and the like are used, and a wing nut and the like are fastened to the stud bolt, so that the sleeve is pressed and fixed to the concrete formwork.

In such a conventional sleeve fixing method, since the sleeve is fixed by tightening with screws, the pressure of the poured concrete often presses the sleeve when it is poured, and the sleeve is often displaced from the fixed position. However, there is a problem that a pipe hole is formed at a displaced position, and when the gas pipe or the like is later piped in the building, the position of the pipe hole is displaced, so that piping becomes impossible.

(Means for Solving the Problems) The present invention has been devised in view of the above-mentioned problems of the related art, and a spike for fixing a sleeve capable of accurately forming a pipe hole at a predetermined position in a concrete layer. The purpose of this is to provide metal fittings, and the gist thereof is metal fittings used when forming pipe holes for piping in the concrete layer. There is a thin plate-shaped outer piece and an inner piece that can be attached to the lower end edge of the sleeve for forming a tube hole that is installed at a position, and the outer piece and the inner piece are connected by a connecting piece that can be bent through folds. In addition, sharp edges are formed on both edges of the connecting piece on the outer side of the inner piece, the inner piece and the outer piece are bent to face each other through the fold, and a sleeve is provided between the inner piece and the outer piece. Insert the bottom edge of After pre-clamping and fixing it to the sleeve, the tooth is driven into the concrete form by press-fitting the sleeve at a predetermined position of the concrete form, and the sleeve is firmly fixed at the predetermined position of the concrete form. That is, it is configured to be fixed.

(Operation) The spike metal fitting is such that the lower end edge of the sleeve is fitted between the inner piece and the outer piece to be fixed in advance by being fixed to the sleeve, and then the sleeve is press-fitted at a predetermined position of the concrete formwork to form a tooth portion. Is driven into the concrete formwork, and the sleeve is firmly fixed at a predetermined position of the concrete formwork via the spike fitting. Therefore, when concrete is poured into the concrete formwork, the sleeve does not shift due to the pressing force of the poured concrete, accurate pipe holes are formed at predetermined positions in the concrete layer, and gas pipes in buildings etc. It can be done well.

(Example) Hereinafter, the Example of this invention is described based on drawing.

FIG. 1 and FIG. 2 show the first embodiment, and FIG. 1 is an enlarged view of a main part at the time of forming a pipe hole for a drain pipe in a slab concrete layer forming a ceiling surface of a building. FIG. 3 is an exploded enlarged perspective view of the sleeve and the spike metal fitting of FIG.

In the figure, when forming the slab concrete layer S, a positioning washer 1 is fixed via a nail 2 on a concrete form K at a site where piping is to be arranged.
A stud bolt 3 is screwed from above to stand upright, and then a sleeve 4 made of an ENVI pipe or a void pipe is fixedly mounted on the concrete form K from above so as to surround the positioning washer 1. A drain main body 5 made of cast metal or the like is installed from above the sleeve 4, a pressing plate 6 is placed on the drain main body 5, and the stud bolt 3 is inserted through the pressing plate 6.
Screw the wing nut 7 onto the top of the
Is fixed to the concrete form K by pressing, and then the protective cover 8 is attached to the upper surface opening of the drain body 5, and in that state, the slab lower surface Sb on the upper surface side of the concrete form K is removed from the upper surface side of the drain body 5. Mortar or concrete is injected into the thickness of the slab upper surface Sa to form the slab concrete layer S.

After the slab concrete layer S has been solidified, the protective cover 8, the wing nut 7, and the pressing plate 6 are removed, and further the lower concrete form K is removed, so that the drain body 5 and the sleeve 4 are inserted into the slab concrete layer S. Be left behind.
A drain pipe or the like can be connected to the inside of the tube hole H of the sleeve 4 or the tube hole H after the sleeve 4 is removed from below to satisfactorily perform drain piping in the slab concrete layer S.

Conventionally, there is a problem that the sleeve 4 is displaced due to the pressing force of concrete or the like that is injected to form the slab concrete layer S, and the piping position is displaced. This is because the sleeve 4 was pressed and fixed only by applying force. In this example, when installing the sleeve 4 on the concrete form K, a plurality of spike fittings 9 as shown in FIG. The sleeve 4 is attached to the lower end edge, and the sleeve 4 is firmly fixed to the concrete form K through the spike fitting 9.

That is, the spike fitting 9 is formed of a thin plate and has a side piece 9a and a pair of locking pieces 9b, 9b integrally formed in parallel with the side piece 9a, and the lower end of the side piece 9a. Saw-toothed tooth portions 9c are formed in the portions. Such spike metal fittings 9
An appropriate number of are attached to the lower edge of the sleeve 4 in a sandwiched manner. At this time, the side piece 9a and the locking piece 9b are clamped to the lower end edge of the sleeve 4 so as to clamp the sleeve 4. For example, after the three spike metal fittings 9 are fixedly attached to the lower edge of the sleeve 4 at equal intervals, the sleeve 4 is installed at a predetermined position of the concrete form K and the sleeve 4 is pressed from above, so that the spike metal fittings 9 are fixed. The tooth portion 9c of the will be driven into the wooden concrete form K, and the sleeve 4 will be firmly fixed.
Fixed to. After that, if the wing nut 7 is further tightened and the sleeve 4 is pressed, the sleeve 4 is more firmly fixed to the predetermined position of the concrete form K through the spike metal fitting 9, and against the pressing force of the concrete to be driven. There is no misalignment.

 A second embodiment is shown in FIGS. 3 and 4.

That is, the spike metal fittings shown in FIGS.
As shown in the developed view of the figure, the outer piece 10a, the inner piece 10b,
It is composed of a connecting piece 10c for connecting the outer piece 10a and the inner piece 10b, and the connecting piece 10c is provided on the outer piece 10a side of the inner piece 10b.
Sharp tooth portions 10d, 10d are formed on both edges of the. The spike fitting 10 can be easily formed by punching a thin plate such as stainless steel, and the folds R ₁ and R ₂ can be formed in advance.
If the connecting piece 10c is formed in the vertical direction, it can be easily bent through the folds R ₁ and R ₂ as shown in FIG.

In the bent state shown in FIG. 4, the lower end edge of the sleeve 4 can be fitted between the inner piece 10b and the outer piece 10a, and the spike fitting 10 can be fixedly attached to the sleeve 4. At this time, the inner piece 10b is attached so as to be positioned inside the sleeve 4, and the plurality of spike fittings 10 are attached to the sleeve 4.
Then, by pressing the sleeve 4 to a predetermined position of the concrete form K as shown in FIG. 1, the protruding tooth portions 10d, 10d can be easily driven into the concrete form K. The sleeve 4 can be firmly fixed to a predetermined position of the concrete form K.

When the slab concrete layer S is formed by fixing the sleeve 4 via the spike metal fitting 10 as described above, when the concrete form K is removed after the slab concrete layer S is consolidated, the tooth portions 10d and 10d have concrete molds. If the concrete form K is pulled down while being driven into the frame K, the inner piece 10b is separated from the outer piece 10a from the fold R ₂ and the inner piece 10 is removed.
b is excluded outside together with the concrete form K. At that time, in the slab concrete layer S, the outer piece 10a and the connecting piece 10c
Will remain, but since there is no protrusion below,
It does not cause any damage when the construction is performed from the lower surface side of the slab concrete layer S later.

As described above, in the spike fitting 10 of this example, since the tooth portions 10d, 10d protruding after the slab concrete layer S is consolidated can be removed during the work of removing the concrete form K, a better pipe hole H can be formed in the slab. It can be formed on the concrete layer S, and other effects are almost the same as those of the first embodiment.

(Effects of the Invention) The present invention is a metal fitting used when forming a pipe hole for piping in a concrete layer, which is installed at a predetermined position of a concrete formwork before driving in mortar or the like which forms the concrete layer. Has a thin plate-shaped outer piece and an inner piece that can be attached to the lower end edge of the sleeve for forming a tube hole, and the outer piece and the inner piece are connected by a connecting piece so that they can be bent via folds, respectively. Sharp edges are formed on both edges of the connecting piece on the outer side of the inner piece, the inner piece and the outer piece are bent to face each other through the crease, and the lower edge of the sleeve is placed between the inner piece and the outer piece. After being fitted and fixed to the sleeve in advance, by pressing the sleeve at a predetermined position of the concrete formwork, the tooth portion is driven into the concrete formwork and firmly fixed at the predetermined position of the concrete formwork. Fixed sleeve With this configuration, the sleeve can be firmly fixed to a predetermined position of the concrete form, and the tube hole can be easily formed at an accurate position in the concrete layer. Further, since the structure is extremely simple, the manufacturing cost is low, and it has an effect that it can be easily used.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 is a sectional layout view of a main part when a pipe hole is formed in a slab concrete layer, FIG. 2 is an exploded perspective view of a sleeve and a spike metal fitting of FIG. 1, Three
FIGS. 4 and 5 show the second embodiment, FIG. 3 is an exploded view of the spike fitting, and FIG. 4 is a perspective view showing a state where the spike fitting of FIG. 3 is bent. 4 ... Sleeve, 5 ... Drain body 9 ... Spike fitting, 9a ... Side piece 9b ... Locking piece, 9c ... Teeth 10 ... Spike fitting, 10a ... Outer piece 10b ... Inner piece, 10c ...... Connection piece 10d ...... Tooth, R ₁ , R ₂ ...... Fold S ...... Slab concrete layer K ...... Concrete formwork

Claims (1)

[Claims] 1. A metal fitting 10 used when forming a pipe hole H for piping in a concrete layer S, which is installed at a predetermined position of a concrete form K before driving in mortar or the like which forms the concrete layer S. A thin plate-shaped outer piece 10a and inner piece 10b that can be attached to the lower edge of the sleeve 4 for forming the tube hole H.
The outer piece 10a and the inner piece 10b are foldably connected via the folds R ₁ and R ₂ , respectively, by the connecting piece 10c, and both edges of the connecting piece 10c on the outer piece 10a side of the inner piece 10b. Sharp tooth portions 10d, 10d are formed in the portion, and the inner piece 10b and the outer piece 10a are bent so as to face each other through the folds R ₁ , R ₂ and the inner piece 10b is formed.
The lower end edge of the sleeve 4 is fitted between the outer piece 10a and the outer piece 10a to be preliminarily fixed to the sleeve 4, and then the sleeve 4 is press-fitted to a predetermined position of the concrete form K, whereby the tooth portions 10d, 10d. The positioning spike metal fitting is characterized in that the sleeve 4 is driven into the concrete form K so that the sleeve 4 is firmly fixed at a predetermined position of the concrete form K.