JPH021941B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for constructing double-sided formwork used in various formwork works, and a construction apparatus therefor.

Conventionally, when constructing this type of double-sided formwork, inserts were buried in advance on both sides of the upper part of the specified concrete to be poured, and brackets were attached to each insert with bolts, etc. A separator is placed between the upper and lower ends of a pair of left and right metal forms on which panel beams are vertically installed at appropriate intervals, and a separator is placed horizontally between the upper and lower ends of each metal form via iron conduits at both ends, and a tie bolt is inserted into each iron conduit with a washer from each panel beam side. A double-sided formwork is formed by screwing each panel beam through a nut and tightening each panel beam with a nut, and each panel beam of this double-sided formwork is level-adjusted with the bracket via a camber etc. according to markings. He supported it as such.

However, not only is it necessary to bury the insert in the concrete that is to be cast in advance, but also a separator must be erected between the upper and lower ends of each metal form, making it difficult to construct and dismantle double-sided formwork. was extremely difficult. Further, when supporting each panel beam with a bracket, the level must be adjusted according to the markings via a camber or the like, and the level adjustment of the double-sided formwork is extremely troublesome.

Therefore, one aspect of the present invention was created to solve the above-mentioned problems.A separator is placed on the top of a predetermined concrete to be poured in advance, and iron concrete is placed on both ends of the separator. Screw them in and bury them horizontally so that they are exposed outward from the side.
A bracket in which a long mounting hole is drilled diagonally to the load direction of the double-sided formwork in a vertical plate is used with a joint nut having a bolt part and a nut part on both ends, and the bolt part is inserted through the mounting hole. After the brackets are screwed into place, each bracket is fitted with a double-sided formwork in which panel beams, each consisting of a pair of front and rear long plates joined back to back at appropriate intervals, are provided on the outer surfaces of the left and right pair of metal forms. This is a double-sided formwork construction method in which tie bolts are screwed into the joint nuts from between each long plate on the outside of each panel beam and supported with nuts, with the lower end of the metal form placed on the joint nut. The invention consists of a separator that is horizontally buried in the upper part of a predetermined concrete by screwing the iron condensers at both ends thereof so that they are exposed outward from the sides of the concrete, and a side surface having an inverted L shape that is attached to both ends of the separator. brackets, joint nuts for screwing each bracket onto each iron contact of the separator, and panel beams each having a pair of left and right long plates joined back to back at appropriate intervals to each of the brackets. The double-sided formwork provided on the outer surface is connected to a tie bolt which is screwed into the joint nut from between each of the long plates on the outside of each panel beam and supported by a nut, with the lower end side of each metal form placed thereon. A mounting hole is formed in the vertical plate of each of the brackets at an angle to the loading direction of the double-sided formwork, and one end of each joint nut is inserted through the mounting hole of the bracket to attach the iron cone of the separator. This is a double-sided formwork construction device that is provided with a bolt portion that is screwed into the tie bolt, and a nut portion that is screwed into the male screw portion of the tie bolt on the other end side. The purpose of this is to make the separator double as an insert, thereby eliminating the trouble of dismantling each insert for mounting brackets and the separator at the bottom end of each metal form, thereby greatly simplifying the construction and disassembly work of double-sided formwork. To provide a method for constructing a double-sided formwork and a construction apparatus therefor, which can be easily carried out and the level adjustment of the double-sided formwork can be extremely easily performed using the mounting holes of the brackets.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

As shown in Figures 1 to 3, in advance,
A separator 2 is placed on the upper part of a predetermined concrete 1 to be poured in advance, and a steel plate 3 is screwed into both ends of the separator 2 so that it is exposed outward from the side surface of the concrete 1, and is buried horizontally. A bracket 4 is attached to each iron contact 3 of this separator 2 from the side with a joint nut 5. That is,
This bracket 4 is formed into an inverted L-shape on the sides from a horizontal plate 6 and a vertical plate 7, and a long elliptical or rectangular mounting hole 8 is formed in the vertical plate 7 using a double-sided formwork A.
(described later) diagonally to the load direction (30 in the figure)
The joint nut 5 has a bolt part 9 on one end,
A nut portion 10 shaped like a cap nut with a long screw hole is provided at the other end, and a flange 1 is provided at approximately the center in the longitudinal direction.
1. Then, attach the bracket 4 to the iron contact 3 of the separator 2, and attach the bolt part 9 of the joint nut 5 to the mounting hole 8 of the vertical plate 7.
Install it by inserting it from the top and screwing it in.

On the other hand, a panel beam 12 in which a pair of front and rear elongated plates are joined back to back at appropriate intervals is provided on the outer surfaces of the left and right pair of metal forms 13, and a separator 14 is provided between the upper ends of each metal form 13. Iron contacts 15 are screwed into both ends of this and horizontally mounted, and tie bolts 1 are attached to each of these iron contacts 15.
6 is screwed in from each panel beam 12 side through a washer 17, and each panel beam 12 is tightened with a nut 18 to form a double-sided formwork A, and the lower end side of each metal form 13 of this double-sided formwork A is The brackets 4 are placed on the horizontal plate 6, and the male threaded portion 20 of the tie bolt 119 is screwed into the nut portion 10 of the joint nut 5 from between each of the long plates on the outside of each panel beam 12 via the washer 21. Each panel beam 12 is supported by a nut 22 so as to be tightened.

Since the present invention is configured as described above, after the bracket 4 is attached to each iron conduit 3 of the separator 2 on the upper part of the concrete 1 with the joint nut 5, the bolt portion 9 is inserted through the attachment hole 8 and screwed. , Place the lower end side of each metal form 13 of the double-sided formwork A on each bracket 4, screw the tie bolt 19 into the nut part 10 of the joint nut 5 from between each long plate on the outside of each panel beam 12, and tighten the nut 22. By supporting the separator 2 with the bracket mounting inserts buried on both sides of the upper part of the concrete as in the conventional case,
Since it can also be used as a separator installed between the lower ends of each metal form using iron contacts, tie bolts, washers, etc., it is possible to save the trouble of dismantling each insert for mounting the bracket and the separator on the lower end side of each metal form. , construction work and dismantling work of double-sided formwork A are extremely easy.

In addition, the separator 2 When attaching the bracket 4 to the iron cone 3 of
When the camber is slightly loosened, there is no need for a conventional camber, etc., and the level adjustment of the double-sided formwork A can be made extremely easy in drafting according to the marking.

Furthermore, the double-sided formwork A can be easily constructed and dismantled, and the structure is simple, consisting of separators 2, brackets 4, joint nuts 5, tie bolts 19, etc., making it extremely economical. .

As explained above, according to the present invention, the conventional work of dismantling each insert for bracket mounting and the separator on the lower end side of each metal form can be omitted, and the work of constructing and dismantling double-sided formwork can be simplified. Moreover, there is no need for a camber or the like as in the conventional method, and the level adjustment of the double-sided formwork according to marking can be made extremely easy, and furthermore, various effects such as being economical can be obtained.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; Fig. 1 is a partially omitted side view of a construction device for double-sided formwork, Fig. 2 is a longitudinal cross-sectional side view of the same main part, and Fig. 3 is an exploded perspective view of the main part. It is a diagram. A...Double-sided formwork, 1...Concrete, 2, 14...
Separator, 3, 15... Iron contact, 4... Bracket, 5... Joint nut, 6... Horizontal plate, 7... Vertical plate, 8... Mounting hole, 9... Bolt part, 10... Nut part, 11... Flange, 12... Panel beam , 13
...Metal form, 16,19...Tie bolt, 1
7, 21...Washer, 18...Nut, 22...Nut,
20...Male thread part.

Claims (1)

[Claims] 1. A separator is placed on the top of a predetermined concrete to be poured in advance, and the separator is screwed into both ends of the separator so that it is exposed outward from the side of the concrete and is buried horizontally. Then, on each steel plate of this separator, attach a bracket with a long mounting hole drilled diagonally to the loading direction of the double-sided formwork in the vertical plate, and a joint nut with a bolt part and a nut part on both ends. After installing the bolts by inserting them through the mounting holes and screwing them in, a panel beam, in which a pair of front and rear long plates are joined back to back at appropriate intervals, is attached to the outer surface of the pair of left and right metal forms. The double-sided formwork provided in each panel beam is supported by nuts by screwing tie bolts into the nut portion of the joint nut from between the respective long plates on the outside of each panel beam, with the lower end side of each metal form placed on each side. A construction method for double-sided formwork featuring: 2. A separator screwed in and buried horizontally on both ends of the specified concrete so that the iron conduit is exposed outward from the side surface of the concrete, and a bracket with an inverted L-shape on the side that is attached to both ends of the separator. and a joint nut that screws each of these brackets onto each of the iron contacts of the separator, and a panel beam in which a pair of long plates are joined back to back at appropriate intervals to each of the brackets, and a panel beam is attached to the outer surface of the pair of left and right metal forms. a double-sided formwork provided on each panel beam, with the lower end side of each metal form placed thereon, and a tie bolt screwed into the joint nut from between each long plate on the outside of each panel beam and supported by a nut; A mounting hole is formed in the vertical plate of each of the brackets at an angle to the loading direction of the double-sided formwork, and one end of each of the joint nuts is inserted through the mounting hole of the bracket and screwed into the iron cone of the separator. A construction device for double-sided formwork, characterized in that a bolt part is provided, and a nut part screwed into the male thread part of the tie bolt is provided on the other end side.