JP4053961B2 - Structure and method for preventing fall of vertical flaps in formwork - Google Patents

Description

  The present invention relates to a structure and method for preventing fall of a vertical flap material to be temporarily fixed when assembling a concrete formwork.

As shown in FIG. 6, in order to set the formwork for constructing the concrete structure 24, the formwork panel 15 is disposed along the pier 20 on the end thick corner 21, and the formwork panel 15 A separator 16 that regulates the interval between them and a foam tie (registered trademark, hereinafter the same) 17 that is a bolt that is provided at both ends of the separator 16 and fastens the formwork panel 15 are installed. The butter material 19 is temporarily fixed to the formwork panel 15, the nut 17 a of the foam tie 17 is fastened, and the formwork panel 15 is fastened.

The butter materials 18 and 19 must be temporarily fixed to the formwork panel 15 until they are tightened by the foam tie 17. Therefore, the vertical butterfly material 18 is temporarily fixed or fixed by attaching a wire 23 to a nail 22 struck against the formwork panel 15 or the pier 20. In addition, it is dangerous to hold the horizontal butterfly material 19 by hand until the operator fixes it. Further, since it takes time, a temporary fixing jig has been proposed.
JP 2000-45519 A

  However, the vertical butter material 18 does not have an appropriate temporary fixing jig or the like, and is temporarily fixed one by one with the nail 22 or the wire 23, which is very troublesome. Further, when dismantling, the wire 23 may be cut, and if the outer wall is a conventional construction method, the vertical butterfly material 18 may fall directly below.

  The problem to be solved is that it takes time to temporarily fix the vertical butter material, and the vertical butter material may fall during dismantling.

A separator for regulating the distance, and the bolt tightening the formwork panel provided at both ends of the separator, concrete type comprising a longitudinal flap member and the transverse flap member is fastened by the bolt tightening the formwork panel A hooking nut provided on a threaded part of the bolt and having a hooking part; and a string member elastically connected between the hooking nuts in a lateral direction; the string member and the formwork panel; This prevents the vertical butterfly material inserted between the two from falling during assembly and disassembly.

The string members are disposed laterally at two locations in the vertical direction of one vertical flap material;
Further, the string member includes a recess having a shape that fits into a part of the outer shape of the vertical flap material.

The structure for preventing fall of the vertical flap material in the formwork according to the present invention includes a formwork panel, a separator that regulates a space between the formwork panels, and a bolt that is provided at both ends of the separator and fastens the formwork panel. An elastic string member is installed in a horizontal direction through a hook nut between the bolts on a concrete mold made of a vertical butterfly material and a horizontal butterfly material that is fastened by the bolt and fastens the formwork panel. The vertical flap material is inserted between the member and the formwork panel to prevent the vertical flap material from falling.

  According to the fall prevention structure and method of the vertical flap material in the formwork according to the present invention, the vertical flap material is pressed against the formwork panel by the elastic string member, and the contact between the formwork panel and the string member is achieved. The vertical butter material is prevented from falling by the frictional resistance force due to contact.

According to the structure and method for preventing vertical flap material falling in the mold according to the present invention, the vertical flap material may be inserted between the mold panel and the string member stretched in the lateral direction, and the temporary fixing work is facilitated. . In addition, the vertical flap material is not temporarily fixed for each piece, but can be temporarily fixed together for each block, so that the work efficiency is improved and the construction period is shortened. It is easy to remove vertical flaps even when dismantling.
Since the string members are disposed in two lateral directions in the vertical direction of one vertical butterfly material, the vertical butterfly material is stably and temporarily supported.
Furthermore, since the string member is provided with a concave portion that fits into a part of the outer shape of the vertical butter material, lateral displacement of the vertical butter material is prevented, and the vertical butter material is temporarily fixed and supported with high accuracy. To do.

  A structure for preventing a vertical flap material from falling in a mold according to the present invention will be described with reference to FIGS. It should be noted that parts corresponding to the conventional example are described with the same reference numerals as those of the conventional example.

  As shown in FIGS. 1 and 2, a mold panel 15 made of a synthetic material, a separator 16 that regulates a distance between the mold panels 15, and the mold panel 15 provided at both ends of the separator 16. This is a concrete formwork composed of a foam tie 17 to be fastened, and a vertical butterfly material 18 and a horizontal flap material 19 that are fastened by the foam tie 17 to fasten the formwork panel 15.

  A hook nut 1 provided on the threaded portion 17b of the foam tie 17 and having a hook portion 1a, and a string member that is elastically connected between the hook nuts 1 and 1 in a lateral direction and has elasticity. 2 are provided.

  As shown in FIG. 3A, the hook nut 1 has a flange having a connecting hole 1b fixed to a nut screwed to a screw rod 17b of the foam tie 17 by welding or the like. Is formed.

  Further, as shown in FIG. 3B, the string member 2 is, for example, a rubber band with a main body part 2a having a belt shape or a round cross section, and is attached to both ends of the main body part 2a. A metal hook 2b is provided integrally.

  As shown in FIG. 4, the hook nut 1 is screwed in advance with the screw rod 17 b of the foam tie 17 before the vertical flap 18 is attached to the formwork panel 15. The mounting position a is set to a dimension position smaller than the dimension t (see FIG. 2) which is the diameter or thickness of the vertical butter material 18.

  Further, as shown in FIG. 5, the string member 2 can be formed by providing the main body portion 2 c with a concave portion 2 d having a shape that fits a part of the outer shape of the vertical butter material 18. If there is such a recess 2d, there are a plurality of required pitches, so that it becomes an indication of the position where the vertical butterfly material 18 is inserted, and the vertical butterfly material 18 is prevented from shifting laterally during temporary placement. The

  According to such a structure for preventing the vertical flap material from falling, when assembling the concrete formwork, the formwork panel 15 is built with the separator 16 interposed, and the screw rod 17b of the foam tie 17 is screwed to the separator 16. To do.

  The hook nut 1 is screwed onto the screw rod 17b. Then, by hooking the hook 2b of the string member 2 to the connecting hole 1b of the hook nut 1, the elastic string member 2 is installed in the lateral direction between the foam ties 17, 17 via the hook nut 1. . Since the hook nut 1 rotates with respect to the screw rod 17b, the hook 2b is easily attached.

  As shown in FIG. 1, the string member 2 is disposed in the lateral direction at two or more locations in the vertical direction of one vertical flap member 18.

  A vertical flap material 18 is inserted into the two upper and lower string members 2. In this way, the vertical flap members 18, 18,... Between the foam ties 17 at a certain location are collectively held as a single block by the string member 2 by temporary fixing.

  Thus, the vertical flap 18 is inserted between the string member 2 and the formwork panel 15, and the vertical flap 18 is prevented from falling. If the string member 2 is provided with the concave portion 2d, the vertical butterfly material 18 is arranged and temporarily placed, and lateral displacement is also prevented.

  Thereafter, the horizontal butter material 19 is attached, the pressing member 17c is applied, and the nut 17a is fastened to the screw rod 17b, whereby the vertical butter material 18 and the horizontal butter material 19 are held. Thereafter, the string member 2 may be left in a horizontal state until the mold is disassembled, or may be removed. At the time of disassembling the formwork, the string member 2 is placed horizontally to prevent the vertical butterfly material 18 from falling. The hook nut 1 and the string member 2 are diverted to other formwork.

  The above-described structure and method for preventing the vertical butterfly material from falling by the string member can be easily applied to such a member if the screw rod or the like is in the vicinity when the member is placed vertically. It can be done.

It is explanatory drawing which shows the fall prevention structure of the vertical flap material in the formwork which concerns on this invention. It is a cross-sectional view of the fall prevention structure of the vertical butter material in the mold according to the present invention. It is the perspective view (A) of the hook nut 1 and the perspective view (B) of the string member 2 in the fall prevention structure of the vertical butterfly material in the formwork which concerns on the same invention. It is explanatory drawing explaining the attachment procedure of the hook nut 1 same as the above. It is a perspective view which shows the other example of the string member 2 same as the above. It is a cross-sectional view which shows the fall prevention structure of the vertical flap material which concerns on a prior art example.

Explanation of symbols

1 hook nut, 1a hook portion, 1b connecting hole,
2 string member, 2a body part, 2b hook,
2c body part, 2d recessed part,
15 formwork panels,
16 separator,
17 foam ties, 17a nuts, 17b threaded parts,
18 Vertical butterwood,
19 Horizontal butterwood,
20 pier,
21 Rounded corners,
22 nails,
Line 23.

Claims (4)

Formwork panel, separator for regulating the interval between the formwork panels, bolts provided at both ends of the separator for fastening the formwork panel, and vertical flap material fastened by the bolts to fasten the formwork panel And a concrete formwork made of
A hook nut provided on the screw portion of the bolt and having a hook portion, and a string member elastically connected between the hook nuts in a lateral direction, are inserted between the string member and the formwork panel. Prevent falling during the assembly and disassembly of
A structure for preventing fall of vertical flaps in a formwork characterized by The string members are arranged in two lateral directions in the vertical direction of one vertical flap material,
The fall prevention structure for the vertical flap material in the mold according to claim 1. The string member is provided with a recess having a shape that fits a part of the outer shape of the vertical flap material,
The fall prevention structure of the vertical butterfly material in the formwork of Claim 1 or Claim 2 characterized by these. Formwork panel, separator for regulating the interval between the formwork panels, bolts provided at both ends of the separator for fastening the formwork panel, and vertical flap material fastened by the bolts to fasten the formwork panel An elastic string member is laid in the horizontal direction via a hook nut between the bolts on the concrete formwork composed of the above and the horizontal flap material, and the vertical flap material is inserted between the string member and the formwork panel, Preventing the vertical flaps from dropping,
The fall prevention method of the vertical butterfly material in the formwork characterized by this.

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