JPH0139319Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a concrete formwork fastener for connecting concrete formworks erected opposite each other to maintain a constant distance between the concrete formworks.

Adjustable in length as such concrete formwork fasteners in order to be able to apply freely when one of the concrete formworks is not parallel to the other concrete formwork and to allow for dimensional errors in the field. Various methods have been proposed (for example, Utility Model Publication No. 44117 of 1983,
Publication No. 59548). These formwork fasteners form a gutter-like recess along the longitudinal direction of the connecting members, fit the connecting members together in the recess, and insert pins into through holes drilled on both sides of the recess. It was supposed to be inserted from the side and fixed. However, with such concrete formwork fasteners, when connecting each connecting member, the pin must be inserted from the side while supporting the concave portions in a fitted state, resulting in poor installation workability and problems. Ta.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a length-adjustable concrete form fastener that facilitates the connection work.

According to the present invention, a hole for attaching the formwork is drilled at one end, a reinforcing bent rib is formed at the center in the longitudinal direction, and both sides of the bent rib are bent 180 degrees into a U-shape. The sheath has a pair of connecting members in which a plurality of through holes are formed at predetermined intervals, and a reinforcing bending rib is formed in the longitudinal center of the sheath. Both sides have a width and thickness to be inserted into the sheath portion of each of the connecting members, and a plurality of through holes that match the through holes formed in the sheath portion are bored on both sides of the bending rib. a U-shaped intermediate member that is inserted into a suitable one of the through holes and fixes the intermediate member and each of the connection members when both ends of the intermediate member are inserted into the sheath of each of the connection members; Equipped with a pin.

Therefore, the length can be adjusted by inserting and sliding both ends of the intermediate member into the sheath of each connecting member, and inserting the U-shaped pin upward into at least a pair of matching through holes at appropriate positions. Each connecting member and the intermediate member can be fixed by inserting the intermediate member. When connecting, the intermediate member is inserted and held in the sheath of each connecting member, so there is no need to support it, and it can be fixed simply by inserting a U-shaped pin from above, making the work easier. It can be carried out.

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

As shown in FIG. 1, a connecting fitting 1 embodying the present invention includes a connecting member 2, an intermediate member 3, and a U-shaped pin 4. Although not shown, the connecting member 2 actually consists of a pair and is adapted to be attached to both ends of the intermediate member 3, respectively. Similarly, the U-shaped pins 4 actually consist of a pair, and are adapted to fix each connecting member 2 at both ends of the intermediate member 3.

The connecting member 2 has a hole 5 at one end into which a bolt or pin for attachment to a formwork (not shown) is inserted. Further, a reinforcing bending rib 6 having a U-shaped cross section is formed in the central portion in the longitudinal direction.
Both sides of the bending rib 6 are each shaped like a U-shape.
It is bent 180 degrees to form sheath parts 7a and 7b. A predetermined interval is provided in the center portions of the sheath portions 7a and 7b along the longitudinal direction. in this case,
The bending rib 6 is formed on the lower side of the sheath parts 7a and 7b. Furthermore, a plurality of through holes 8 are formed at predetermined intervals in the sheath parts 7a and 7b, passing through them vertically. A pair of break-off grooves 9 are formed between the end hole 5 and the bending rib 6.

On the other hand, the intermediate member 3 has an appropriate length depending on the interval between the concrete forms, and various lengths may be prepared. Further, a reinforcing bending rib 11 having a U-shaped cross section is formed in the central portion in the longitudinal direction. Both side portions 12a and 12b of the bending rib 11 have a width and thickness such that they can be inserted into the sheath portions 7a and 7b of the connecting member 2. In addition, at that time, the bending rib 1
1 is designed to be inserted into the gap. A plurality of through holes 13 are bored at predetermined intervals in both side parts 17a and 17b so as to suit the through holes 8 of the sheath parts 7a and 7b at appropriate sliding positions. Note that the through holes 13 may be ubiquitously formed at both ends of the intermediate member 3.

Both ends of the U-shaped pin 4 are bent so as to be inserted into a pair of corresponding through holes 8 and 13 in a direction perpendicular to the longitudinal direction.

Next, when attaching to the concrete formwork, insert one end of each of the pair of connecting members 2 into opposing parts of the formwork, and insert a bolt or pin into the hole 5 of each connecting member 2 to fix it to the formwork. do.
Then, both ends of the intermediate member 3 are inserted into the sheath portions 7a and 7b of each connecting member 2. In that case, the intermediate member 3
The bending rib 11 is inserted into the gap between the sheath parts 7a and 7b, and the bending ribs 6 and 11 protrude in opposite directions. In addition, in this state, the intermediate member 3 is held by the sheath portions 7a and 7b of each connecting member 2,
It remains connected even without support. Therefore, the intermediate member 3 is connected to the sheath portions 7a, 7b of each connecting member 2.
By sliding it inside, the length of the concrete form stopper 1 can be adjusted as appropriate. Then, the through holes 8 of each connecting member 2 and the through holes 13 of the intermediate member 3 are made to match, and a U-shaped hole is inserted from above into the pair of matched through holes 8 and 13 corresponding to the direction perpendicular to the longitudinal direction. By inserting pin 4,
Each connecting member 2 and intermediate member 3 can be fixed. In this way, with the intermediate member 3 inserted into the sheath parts 7a and 7b of each connecting member 2, each connecting member 2
and the intermediate member 3 can be maintained in a connected state without being supported, making it easy to adjust the length. Further, in this state, the U-shaped pin 4 can be fixed by simply inserting it from above into the corresponding through holes 8 and 13, so that the fixing operation is easy. Furthermore, since the bending ribs 6 and 11 of each connecting member 2 and intermediate member 3 protrude in opposite directions in the connected state, sufficient strength can be obtained as a whole. In addition, after pouring concrete into the formwork and removing the formwork after the concrete has solidified, tap the end of each connecting member 2 that protrudes from the concrete wall surface with a hammer, and use the break-off groove 9. Try to break it off.

Other modifications of the bending ribs 6, 11 are shown in FIGS. 2 and 3. That is, in FIG. 2, the bent portion is formed into a pipe shape or a C-shaped cross section. Further, in FIG. 3, the bent portion is folded into a T-shaped cross section.

As explained above, according to the present invention, the length can be adjusted by inserting and sliding the intermediate member into the sheath of each connecting member, and in this state, each connecting member and the intermediate member are supported. The connected state can be maintained even without the U-shaped pin, and each connecting member can be fixed simply by inserting the U-shaped pin from above, so work efficiency can be improved.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a concrete form stopper according to the present invention, and FIGS. 2 and 3 are cross-sectional views showing deformed bending ribs in the concrete form stopper. 1... Concrete formwork stopper, 2... Connecting member, 3... Intermediate member, 4... U-shaped pin, 5
... hole, 6 ... bending rib, 7a, 7b ... sheath part,
8...Through hole, 11...Bending rib, 12a, 12b
...Both sides, 13...Through holes.

Claims (1)

[Scope of utility model registration request] A hole for attaching the formwork is drilled at one end, a reinforcing bending rib is formed at the center in the longitudinal direction, both sides of the bending rib are bent 180 degrees into a U-shape to form a sheath, and The sheath has a pair of connecting members in which a plurality of through holes are bored at predetermined intervals, and a reinforcing bending rib is formed in the center in the longitudinal direction, and both sides of the bending rib are connected to each of the connecting members. an intermediate member having a width and thickness to be inserted into the sheath part of the sheath part, and further having a plurality of through holes formed on both sides of the bending rib that match the through holes made in the sheath part; U-shaped pins are inserted into matching through holes to fix the intermediate member and each of the connecting members when both ends of the intermediate member are inserted into the sheaths of the respective connecting members. Concrete formwork fasteners characterized by: