JPH0139320Y2 - - 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 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, Utility Model Publication No. 55-44117;
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, which results in poor installation workability and 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 bored at one end, a reinforcing bending rib is formed at the center in the longitudinal direction, and both sides of the bending rib are bent 180 degrees into a U-shape. A first connecting member forming a sheath part, and a first connecting member having a plurality of through holes drilled at predetermined intervals in the sheath part, a hole for attaching a formwork to one end, and a first connecting member in the longitudinal center part. A reinforcing bent rib is formed, and both sides of the bent rib have a width and thickness to be inserted into the sheath portion of the first connecting member, and further, holes are formed in the sheath portion on both sides of the bent rib. a second connecting member having a plurality of through holes drilled therein that match the through holes formed therein, and a second connecting member that is inserted into each of the through holes when the second connecting member is inserted into the sheath portion of the first connecting member; It is equipped with a U-shaped pin that fixes the two.

Therefore, the length of the second connecting member can be adjusted by inserting and sliding the second connecting member into the sheath of the first connecting member, and the U-shaped pin is inserted into at least a pair of matching through holes at an appropriate position. Each connecting member can be fixed by inserting it from above.
When connecting, the second connecting member is inserted and held in the sheath of the first connecting member, so there is no need to support it, and it can be fixed simply by inserting a U-shaped pin from above. Work can be done easily.

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 first connecting member 2, a second connecting member 3, and a U-shaped pin 4.

The first connecting member 2 has a hole 5 at one end through which a bolt 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 bent 180 degrees into a U-shape to form sheath portions 7a and 7b. A predetermined gap is provided in the center portions of the sheath portions 7a, 7b along the longitudinal direction. In this case, the bending rib 6 is formed below the sheath parts 7a and 7b. Further, a plurality of through holes 8 are formed at predetermined intervals in the sheath portions 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 second connecting member 3 has a hole 15 at one end through which a bolt for attaching to a formwork (not shown) is inserted. In addition, in the center part in the longitudinal direction, there is a cross section U.
A reinforcing bent rib 16 having a letter shape is formed. Both sides 17a and 17b of the bending rib 16 are the first
The width and thickness are such that it can be inserted into the sheath parts 7a, 7b of the connecting member 2. Further, at that time, the bending rib 16 is inserted into the gap. Through holes 8 of sheath parts 7a, 7b are provided on both sides 17a, 17b.
A plurality of through holes 18 are bored at predetermined intervals to suit the sliding position as appropriate. Note that a pair of break-off grooves 19 are bored between the end hole 15 and the bending rib 16.

Both ends of the U-shaped pin 4 are bent so as to be inserted into a pair of corresponding through holes 8 and 18 in a direction perpendicular to the longitudinal direction.

When attaching to the concrete formwork, first, the second connecting member 3 is inserted into the sheath portions 7a, 7b of the first connecting member 2. In that case, the bending rib 6 of the second connecting member 3 is inserted into the gap between the sheath parts 7a and 7b, and the bending rib 6 and the bending rib 16 protrude in opposite directions. Then, the ends of the connecting members 2 and 3 are respectively inserted into opposing parts of the formwork, and bolts or pins are inserted into the holes 5 and 15, respectively, to fix them to the formwork. In this state, the second
The connecting member 3 is held by the sheath parts 7a and 7b, and maintains the connected state even if it is not supported. Therefore,
The second connecting member 3 is connected to the sheath portion 7 of the first connecting member 2.
a, 7b, adjust the length appropriately to match the pair of through holes 8 and 18 that correspond to each other in the direction perpendicular to the longitudinal direction, and insert the screw into the matched through holes 8 and 18 from above. A letter-shaped pin 4 is inserted to connect the connecting members 2 and 3. In this way, the second connecting member 3 is connected to the sheath portion 7a of the first connecting member 2,
Since each connecting member 2, 3 can maintain a connected state without being supported when inserted into 7b, the length can be easily adjusted. Further, the fixing operation is easy because the U-shaped pin 4 can be fixed by simply inserting it into the through holes 8 and 18 from above. Furthermore, since the bending ribs 6, 16 of each connecting member 2, 3 protrude in opposite directions in the connected state, sufficient strength can be obtained. After pouring concrete into the formwork and removing the formwork after the concrete has hardened, tap the ends of each connecting member 2 and 3 that protrude from the concrete wall surface with a hammer or the like to create a break-off groove. Make sure to break it off at 9 and 19.

Other modifications of the bending ribs 6, 16 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 second connecting member into the sheath of the first connecting member, and in this state, each connecting member is The connected state can be maintained without support, and each connecting member can be fixed simply by inserting a U-shaped pin from above, so work efficiency can be improved.

[Brief explanation of the drawing]

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 a modified form of the bending rib in the concrete form stopper. 1... Concrete formwork stopper, 2... 1st
connecting member, 3... second connecting member, 4... U-shaped pin, 5... hole, 6... bending rib, 7a, 7
b...sheath part, 8...through hole, 15...hole, 16...
Bent ribs, 17a, 17b...Both sides, 18...
Through hole.

Claims (1)

[Scope of utility model registration request] A hole for attaching the formwork is bored 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 portion includes a first connecting member having a plurality of through holes drilled at predetermined intervals, a hole for attaching a formwork to one end, and a reinforcing bent rib in the longitudinal center portion. The bending rib has a width and thickness such that both sides of the bending rib are inserted into the sheath portion of the first connecting member. a second connecting member having a plurality of through holes formed therein; and a screw that is inserted into each of the through holes and fixes the two when the second connecting member is inserted into the sheath of the first connecting member. A concrete formwork fastener characterized by being equipped with a letter-shaped pin.