JPS5922177Y2 - Side flap fixing device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device for fixing horizontal flaps in vertical formwork supports for constructing concrete walls.

Conventionally, as shown in FIGS. 1 and 2, when horizontal butterflies 5 are passed through each horizontal hole 6a of a vertical formwork support member 6 in a cross shape and fixed for the purpose of assembling both in a cross-shaped structure, the horizontal butterflies are used. 5 to hole 6
After moving it to one side of a, on the other side where there is an air space, two identical fasteners 7 each having a rectangular shape and having a tapered surface 7a on only one side in the longitudinal direction are placed so that the tapered surface 7a is on the hole 6a side. When the fasteners 7, 7 are arranged facing each other and are tightened with the long screw 8 passing through them, the fasteners 7, 7 come close to each other due to the sliding contact of the tapered surface 7a with the edge of the hole 6a, so that they are temporarily fixed. However, since the tapered surface 7a and the edge of the hole 6a come into line contact, the sliding of the fastener 7 lacks smoothness, and an excessive pressing force is applied locally at the contact point, so the edge of the hole 6a is easily deformed. As a result, the accuracy of the wall A may be degraded by affecting the formwork B attached to the support member 6, or in order to prevent this, it is necessary to add ribs near the edge of the hole 6a, making the structure complicated. This has the disadvantage that it becomes difficult to form a large panel that is integrated with the formwork B.

This idea improves this, and by receiving the reaction of tightening against horizontal flaps through surface contact, it does not affect the formwork, maintains the accuracy of the wall, and creates a simple structure that does not require additional ribs. The object of the present invention is to provide a device for fixing horizontal flaps in a formwork support material that can be made into a large panel together with the formwork.

This invention will be explained below with reference to the drawings. As shown in FIGS. 3 and 4, the vertical formwork support member 1, which is erected in close contact with the wall surface of the formwork B, has a regular size with a rectangular cross section. By forming horizontal holes 1a and la for horizontal flap insertion on both sides of the hollow body, and drilling a blank hole 1b at the center of the front and at the same height as the central plane of the horizontal hole. configured.

In both horizontal holes 1a, 1a of the vertical formwork support material 1, as shown in FIG. A fastener 3 with a hole provided in the center of the square plate and a female threaded pipe part 3a protruding from the back thereof in communication is housed concentrically with the blank hole 1b by arranging both the pipe parts 2a and 3a facing each other. After that, a long screw 4 whose tip is formed in the frame part 4a is inserted into the blank hole 1b from the outside of the support material 1, and the screw part is inserted into the female threaded pipe part 3a of the fastener 3, and the screw part at the tip is inserted into the frame part 4a. The portion 4a is rotatably fitted into the bare tube portion 2a of the presser foot 2, and constitutes a device for fixing the horizontal flaps in the vertical formwork supporting material as a whole.

As a result, when the horizontal butterfly 5 is inserted into the horizontal hole 1a of the vertical formwork support material 1 as shown in FIGS. When 4 is rotated in the spiral direction, the fastener 3 fitted into the threaded part
As the female threaded pipe portion 3a advances, it comes into contact with the inner surface of the blank hole 1b, and from then on, in order to maintain the fixed state using this surface portion as a base, only the long screw 4 enters, so that it can be tightened with the presser foot 2. As a result of increasing the distance from the tool 3, the horizontal butterfly 5 can be strongly fixed between the hardware 2 and one side edge of the horizontal hole 1a.

As described above, in this invention, the presser foot 2 and the fastener 3 are housed in the horizontal hole 1a of the vertical form support 1 in a facing manner, and the long screw 4 is inserted from the outside through the blank hole 1b. By inserting and rotating the fastener 3, even if it receives a reaction force when fixing the horizontal butterfly 5 by this screwing operation, the fastener 3 comes into surface contact with the inner surface of the blank hole 1b and the point of force is dispersed, so that it is not localized. Since there is no excessive pressing force, the formwork B is not affected and the accuracy of the wall A can be maintained, and the structure of the support 1 does not require additional ribs and the cross section is a simple box. As a result of using a mold,
This has the effect of easily forming a large panel with formwork B and improving the efficiency of formwork construction.

[Brief explanation of the drawing]

Fig. 1 is a side view of the main part showing the fixing state of the horizontal butterfly according to the conventional example, Fig. 2 is a cross-sectional plan view of the same main part taken along line C-C in Fig. 1, and Fig. 3 is the fixation of the horizontal butterfly according to this invention. FIG. 4 is a cross-sectional plan view of the essential parts taken along the line D--D in FIG. 3, and FIG. 5 is an exploded perspective view showing the essential parts of the device. Explanation of symbols 1, 6... Vertical formwork support material, la
, 5a... Horizontal hole, 1b... Prime hole, 2.
...Press fitting, 2a... Plain pipe part, 3,
7... Fastener, 3a... Female thread pipe section,
4゜8...Long screw, 4a...Frame part,
5... Horizontal flap, 7a... Tapered surface,
A: Wall, B: Formwork.

Claims (1)

[Scope of utility model registration request] A vertical formwork supporting member 1 having a hollow body having a rectangular cross section has communicating horizontal holes 1a, 1a in both side plates, and blank holes 1b in the front plate connected to the both side plates. Hole 1a,
A horizontal butterfly 5 is inserted into 1a, and a presser foot 2, a fastener 3, and a long bolt 4 are provided as means for connecting the horizontal butterfly 5 and the vertical support member 1. It is formed of a member having a U-shaped cross section that fits into one end of the horizontal butterfly 5 and a bare pipe portion 2a that protrudes from the member. A vertical formwork supporting material is provided in such a manner that a female threaded pipe portion 3a communicating with the central hole is protruded, the central hole is aligned with the blank hole 1b, and the square plate is brought into contact with the inner surface of the front plate of the vertical formwork supporting material 1. 1, the long screw 4 has a frame portion 4a at its tip, a threaded portion in the middle, and a head for receiving a tightening tool at its base end, and the long screw 4 is fitted into the blank hole 1.
It is inserted into the vertical formwork supporting material 1 from the b side, and the intermediate threaded part is screwed into the female threaded pipe part 3a of the fastener 3, and the frame part at the tip is inserted into the plain pipe part 2a of the presser foot 2. A fixing device for a horizontal flap, characterized in that it is rotatably supported under pressure.