JPS59177471A - Arranging method of sleeve for forming slab piercing hole - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION In order to form through holes in a slab, the present invention involves installing a sleeve for forming through holes on the bottom plate of the form before pouring concrete and cleats into the form. Regarding how to keep it.

When installing such a through-hole forming sleeve on the bottom plate of a form, conventionally, as illustrated in FIG. Sew a sleeve C and spread it over the 4υ frame bottom plate a', and fix it by driving a nail d... diagonally from the outside into the same corner of the bottom of the sleeve C, and then seal the upper end opening with duct tape e.
It was done by a method called %gu. In addition, sleeve C setting Uf
fJillThe reason why this slab reinforcing bar B... was placed is that if Sleeve C was placed before Slab 6,
This is because the sleeve C is likely to become inconvenient if it gets in the way of the reinforcement a, or the sleeve C is hit by the iron dib during reinforcement, causing the sleeve C to tilt or fall.

However, in the conventional method described above, the sleeve must be installed through the gap after sheathing, so the installation position 1g often deviates from the predetermined position. When driving nails into the concrete, the reinforcing bars that have been cut vertically and horizontally get in the way, making this work extremely difficult.As a result, the sleeve cannot be fixed firmly enough, causing it to tilt or shift when concrete is being poured. This also causes the formation of slab B11ff1 hole! :?
Therefore, there was a drawback that troublesome repair treatment due to concrete damage 9 etc. after 41 was required.

The present invention has been made in view of the above-mentioned conventional situation, and its purpose is to provide a method for easily and accurately fixing a through-hole forming sleeve on the bottom plate of a slab formwork. It's about trying.

4-man earthwork First, an embodiment of the method of the present invention will be described based on the drawings.

As shown in FIGS. 2 and 8, the method for installing a sleeve for forming a sweep through hole according to the present invention is carried out in the following steps. That is, (1) First, for example, a slab formwork 1 for a floor is constructed.

Then, the installation position of the through-hole forming sleeve 2 is marked on the upper surface of the bottom plate 1a of the formwork 1.

(11) Next, the marked out predetermined position #I on the bottom plate 1a
The outer part 3A is formed as a stepped part so that the sleeve 2 can be externally fitted from above. The receiving part 3B is fixed to the disk method sleeve holder 6 integrally erected with 14... or screws.The receiving part 3B is the lower end of the support column 5 as shown in the figure. jfD' 5
It has horizontal direction 1f+"j 5 b, 5 b for receiving the horizontal direction rod 5a integrally connected to /l.

0ii) As described in r3il, after fixing the sleeve holder 6 on the bottom plate 1a of the formwork 1, install the slag iron holder 6 so as to secure a space on both sides of the holder 3. Vertical w: Reinforcement is placed horizontally.

4V) Next, the lower end part 5A of the holding column 5 having the structure as indicated in -11 is attached to the central part 3B of the sleeve holder 3.
By inserting it from above and rotating it about 200 times,
The support column 5 is erected and fixed.

The upper end 5B of this support column 5 has a lid 7 that can be attached to the upper opening of the sleeve in advance.
It is provided in a d-shaped configuration, has a vertical elongated hole 5b, and is connected to a suppressing member 9 formed of a wedge body via a chain 8.

(V) After the support column 5 is erected and fixed, the cover body 7 is fitted over the top of the 7 rings 2, and the wedge-shaped pressing housing material 9 is attached to the end of the support column 51. 5B into the elongated hole 5b, and press the lid 7 and the i-sleeve 2 downward to firmly fix the sleeve 2.

Then, since concrete 10 will be poured after this,
After the concrete 10 has solidified, the pressing member 9 is hammered out in the opposite direction, the lid 7 and the support column 5 are removed, and the formwork 1 is removed. If the sleeve 2 is hard, such as a vinyl chloride sea bream, it may be left as is to serve as a wall of the Jomon hole, or it may be removed by breaking it. If the sleeve 2 is soft, such as made of void (cardboard impregnated with asphalt), it may be removed by tearing it.

In the above example, the procedure for (Vil, M) is as follows:
It doesn't matter if it's in that order or the reverse. Further, the wedge-down suppressing member 9 described in O1J does not necessarily need to be connected to the support column 5 by the chain 8, and the ¥1 yen 7 does not need to be inserted into the upper end 5B of the support column 5 in advance. All it is necessary is to make it pluggable if necessary.

Furthermore, the lower end portion 5A of the support column 5 and the center portion 3B of the sleeve holder 3 that holds it are not limited to those in the above-described embodiment, but may be of a simple insertion type as shown in FIG. Alternatively, a screw-in type as shown in Fig. KS5 may be adopted.

Further, as the end portion 5B of the support column 5 and the suppressing member 9, boiled nut type ones may be adopted as shown in FIG.

Furthermore, as the lid body 7, as in the above embodiment, a lid body 7 that fits one sleeve may be used for each sleeve 2.
Because it fits into the sleeve, there is no Q-yu, and multiple sleeves 2 are in contact with each other.
You may also use a large piece 7' that can be fitted over the whole area all at once. In this case (as shown in the figure), there is an advantage that the number of supporting columns 5 and pressing plates li + A' 9 can be smaller than the number of sleeves 2. It is more preferable to use an elastic body such as

In short, the method for installing a sleeve for forming through-holes in a slab according to the present invention involves, in order to form through-holes in a slab, prior to pouring concrete into a formwork, through-holes are installed on a paper board of the formwork. This is a method in which a forming sleeve is installed, and the following steps are essential components. That is, (2) constructing a slab formwork, (a) having an outer peripheral part at a predetermined position of the formwork bottom plate 1 into which the lower end of the through-hole forming sleeve 7° can be externally fitted, and supporting at the center part. Fix the plate sleeve holder that has a receiving part that can hold the lower end of the column, ←) Arrange the slab reinforcement, and At the same time, attach the lower end of the long support column of the sleeve holder to the center part of the sleeve holder and set the support column upright. At the same time, a lid body is attached to the upper part of the sleeve in such a manner that the upper end of the support pillar is exposed to one side; The method is characterized in that it includes the step of firmly fixing the sleeve by installing a member for pressing the sleeve downward.

The effects achieved by the above features are as follows. In other words, (tl) Before reinforcing the slap iron cutter, we fixed the sleeve holder on the bottom plate of the formwork in advance to fit the sleeve later, so that the sleeve could be easily installed. Sufficient stacking at the r3 li position was ensured, and (6) In addition, since the sleeve holder was made of a relatively thin plate of 1N, it did not get in the way when reinforcing the slab iron 6. (C) j! By pressing the lid fitted over the upper part of the sleeve downward in cooperation with the support column and the suppressing member,
Since the sleeve can be easily and firmly fixed upright, there is no problem such as the sleeve tilting or shifting during concrete pouring, which was previously seen.
Overall, the through-hole forming sleeve can be installed easily and precisely at the predetermined position of the slab formwork bottom plate 1, and as a result, there is almost no need for subsequent repair processing, shortening the construction period and reducing construction costs. be.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view for explaining the problems of the prior art, and FIGS. 2 and 3 are cross-sectional views and perspective views for explaining the method of the present invention, and FIG. 4, FIG. 5, FIG. 6, and FIG. 7 are sectional views of main parts showing different reliable examples, respectively. 1... to ν frame, 1a...1 DL board, 2.
...Sleeve, 3...Sleeve holder, 6A
...outer periphery of 6, 3B...reception part, 5...support column, 5A...lower end of 5, 5B...upper end of 5, 5b...length formed on 5B hole, 6... reinforcing bar,
7... Common form, 9... Pressing member, 10...
concrete. Figure 1 Figure 7 Figure 3 Figure 6

Claims (1)

[Claims] ■ In order to form through holes in the slab, before pouring concrete into the 411 frame, i.
A method in which a sleeve for forming a through hole is installed, (7) constructing a slab formwork, and (a) placing the lower end of the sleeve for forming a negative hole at a fixed position on the bottom plate of the formwork. It has an outer part that can be fitted onto the outside, and a sleeve that can hold the lower width of the support column in the center part. -7i) In addition to the sleeve retainer 1. ', Insert the lower end of the Nureap for forming the hole 1111 into 1 and b. At the same time, the lower end of the support column, which is longer than the sleeve, is attached to the central part of the sleeve holding column, and the support column is set up and down. Column J: In order to press the +iif lid body downward against the protruding upper end of the support column, the northern part of the sleeve (with the cover body attached) is in a state where the end protrudes downward. 1. A method for installing a sleeg for forming a slap through hole, comprising the steps of: tightening the member and firmly fixing the sleeve. (2) The method according to claim 1, wherein the suppressing member used in step (1) is a wedge body that is fitted into a downward hole formed at one end of the support column. .