JPS6327501B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for easily forming a formwork for concrete, and a fastener used therein.

Generally, when building concrete walls, etc.
Conventionally, panels are made of plywood with a length of 1800 mm, a width of 900 mm, and a thickness of 12 mm, with crosspieces on both sides and holes for tightening rods at appropriate intervals. are arranged in two rows facing each other with the panels on the outside, a separator is interposed between the panels, and a tightening rod consisting of a screw rod integrated with the separator is inserted into and projects through the tightening rod insertion hole of the panel, A panel holding material made of long steel or the like is arranged perpendicular to the panel crosspiece, and on top of it, two panel holding members are placed perpendicular to the holding material with the tightening rod in between, and the two panel holding members are A construction method is used in which a formwork is formed by disposing a presser on a panel presser, screwing a nut onto a tightening rod and tightening the presser, and then pouring concrete into the formwork.

According to this construction method, the panels are held down by panel holding materials, so when concrete is poured into the formwork, the panels are prevented from bending due to the pressure of the concrete, so concrete walls, etc. However, the panel restraints used to form the formwork in this method are usually
Since it is a long steel pipe, it is long and heavy, so it is difficult to handle and takes time to carry in and out, and transportation costs are high. Since workers who support the ends of the timber and workers who perform the tightening work are indispensable, labor costs are high, which, combined with low work efficiency, inevitably leads to high construction costs.

The present invention has been made in view of the above-mentioned drawbacks of the prior art.
The purpose of this invention is to provide a method for forming concrete formwork that is simple, efficient, and comparable in strength to conventional formwork, and to provide fasteners used therein. The structure is made of plywood, etc., which has the strength to maintain flatness without bending when formed in a formwork and poured concrete, and is flat with no irregularities on the front and back and has an appropriate thickness. A plurality of panels each having shaped notches at appropriate regular intervals are placed upright in two rows, with joints formed by the notches between adjacent panels, and the adjacent panels in one row are A rod-shaped spacer is interposed between each joint and the other adjacent panel facing each joint, while a flange is provided on one side and a screw rod is installed on the other side in the axial direction. A nut member extending and fixed at the flange side and formed so that the end of the spacer is screwed together from the flange side is fitted to the seat member so as to lock the flange to the seat, and a rectangular tubular shaped nut member. The spacer is tightened so as to be pulled in from both ends using a tightening tool consisting of a relatively long screw threaded with the screw rod and a tightening member provided with a flange-like pressing plate on the front surface of the screw. It is characterized by simultaneously tightening and connecting panels to form a formwork, and the structure of the fastener is such that a flange is provided on one side and a screw rod is provided on the other side extending in the axial direction. A seat member is formed by fixing the nut, which is formed so that the end of the spacer is screwed into the spacer from the flange side, and is fitted into the seat at the flange; The fastening member has a flange-like pressing plate formed on the front surface of a relatively long screw cylinder that fits together.

Next, embodiments of the present invention will be described with reference to the drawings.

1 is a formwork forming panel made of plywood, which is thicker than the plywood used for normal panels, and has enough strength that it will not warp even if it is formed into a formwork and concrete is poured and pressure is applied to the inner wall. Semicircular notches 2 are placed at appropriate intervals on the end face (usually 400 mm)
There are a large number of them, and their size is 400mm wide
The thickness shall be 28 mm, and the length shall be determined by the height of the wall etc. to be constructed.

3 has a flange 31 on one side and a screw rod 3 on the other side.
2 is fixed in the axial direction, and a synthetic resin catch 34 is fitted and locked to a nut 33 into which the end of the bar-shaped spacer 4 is screwed from the flange 31 side. The seat 34 has a truncated conical cylindrical shape, and its head side is fitted and locked to the flange 31 and is fitted into the nut 33.

Reference numeral 5 denotes a flange-shaped pressing plate 5 on the front surface of a hexagonal cylinder-shaped screw cylinder 51 into which the screw rod 32 of the seat member 3 is screwed.
In this tightening member, three triangular ribs 53 are provided on the screw tube 51 and the pressing plate 52, spaced apart by 120 degrees. The ribs 53 are provided as necessary for the purpose of reinforcement and to rotate the tightening member 5 by hitting it with a hammer or the like during tightening work.

In order to form the panel 1 into a formwork, first, the catch members 3 are connected to both ends of the spacer 4, and the panel 1 is shaped to a length corresponding to the lengths of the spacers 4 and the catch members 3. The threaded rods 32 of the catch member 3 are arranged in two rows with an interval between each other, and the screw rods 32 of the seat member 3 are placed in the circular holes formed by the adjacent notches 2 of the opposing adjacent panels 1, and the tips thereof are connected to the panels 1 The screw tube 51 of the tightening member 5 is screwed into the screw rod 32, and the screw tube 51 is rotated with a wrench or by hitting the rib 53 with a hammer or the like. When tightened, two adjacent panels 1,
The seat member 3 is in pressure contact with the back surface of the joint of the panel 1, and the pressing plate 52 of the tightening member 5 is in pressure contact with the front surface, and both panels are firmly connected. A formwork is formed to obtain walls with a thickness of .

That is, the method of the present invention uses panels that form the formwork that are thicker and narrower than conventional panels, and does not have conventional crosspieces or tightening rod insertion holes in the panels, but properly inserts holes on both left and right end surfaces of the panels. A plurality of panels are provided with semicircular notches at intervals, and a plurality of the panels are arranged vertically facing each other in two rows, and the circular holes formed in the joints of adjacent panels in one row are A bar-shaped spacer is interposed between the circular holes formed at the joints of adjacent panels in the row, and the formwork is tightened and connected using a fastener that simultaneously tightens the adjacent panels in relation to the spacer. The fastener is a nut having a flange on one side and a threaded rod fixed in the axial direction on the other side, and a truncated cone-shaped seat or the like is locked to the flange. A flange-like pressing plate is provided on the front surface of a relatively long hexagonal cylinder or the like that screws together the fitted catch member and the screw rod, and a tightening plate is provided with ribs as necessary on the screw cylinder and the pressing plate. The nut of the catch member is screwed onto both ends of the spacer so that the threaded rod of the catch member protrudes from the circular hole formed in the joint part of the panel, and the screw tube of the tightening member is attached to the screw rod. When the panels are screwed together and tightened, the catch of the catch member comes into pressure contact with the back surface of the panel joint, and the press plate of the tightening member presses against the front surface, making it possible to firmly connect both panels at the same time at their joints. Compared to conventional mold forming methods, this method has the following advantages.

1 In the conventional method, many steel pipes are used as panel holding materials, but these steel pipes are long and heavy, so they are difficult to handle and take time to transport to and from the construction site, as well as being difficult to transport. In addition to being expensive, workers are required to support the steel pipe during formwork forming work, so labor costs are inevitably high.
There are various disadvantages due to the use of long steel pipes as panel holding materials, such as difficulty in assembling and disassembling the formwork, but since the present invention does not use steel pipes at all, the above-mentioned difficulties arise. There are none.

2. In the conventional method, panels had to be provided with crosspieces, which increased the cost of manufacturing the panels and required a large space for storage.However, since the panels of the present invention do not have crosspieces, the cost of manufacturing the panels is reduced. is not necessary, and also does not require a large space to store the panels. Further, since conventional panels are relatively thin, they cannot be used repeatedly many times, but the panels of the present invention are relatively thick, so they can be used repeatedly many times.

As described above, according to the method of the present invention,
Formwork for concrete can be formed more simply, efficiently, and at lower cost than conventional forms, and the fasteners used to carry out the method of the present invention have a simple structure and can be manufactured easily and inexpensively. provided and obtained.

[Brief explanation of the drawing]

Fig. 1 is a front view of an example of a concrete form formed by the method of the present invention, Fig. 2 is a partially enlarged front view, Fig. 3 is a partially enlarged side view, and Fig. 4 is a partially enlarged side view.
The figure is an enlarged vertical side view of the main part. DESCRIPTION OF SYMBOLS 1... Panel, 2... Notch, 3... Seat member, 31
...Flange, 32...Screw rod, 33...Nut, 34...
catch seat, 4... spacer, 5... tightening member, 51... screw cylinder, 52... pressing plate, 53... rib.

Claims (1)

[Scope of Claims] 1. It has the strength to maintain flatness without bending when it is formed into a formwork and concrete is poured into it, and is made of plywood or the like that is flat with no irregularities on the front and back sides and has an appropriate thickness. A plurality of panels each having semicircular notches on their end faces at appropriate regular intervals are placed upright in two rows, with joints formed by the notches between adjacent panels. A rod-shaped spacer is interposed between each joint of an adjacent panel and each joint of the adjacent panel of the other row facing each joint, while a flange is provided on one side and a flange is provided on the other side. A screw rod is extended and fixed in the axial direction, and
a seat member in which a nut member formed to screw together the end of the spacer from the flange side is fitted so as to lock the flange to the seat;
The spacer is tightened so as to be pulled in from both ends using a tightening tool consisting of a relatively long rectangular cylinder or the like and a tightening member having a flange-like pressing plate on the front surface of a relatively long screw cylinder into which the screw rod is screwed. A method for forming a formwork for concrete, characterized by forming a formwork by simultaneously tightening and connecting adjacent panels. 2. A flange is provided on one side, a threaded rod is fixedly extended in the axial direction on the other side, and a nut formed so as to thread the end of the spacer from the flange side is engaged with a seat at the flange. A fixing member for concrete, characterized in that it comprises a receiving seat member fitted into the member, and a tightening member having a flange-like pressing plate formed on the front surface of a relatively long rectangular cylinder or the like into which the screw rod is screwed. Fasteners used in formwork forming methods.