JPS6315492Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a flat strip-shaped member having a locking part on one end that is inserted between the overlapping abutting surfaces of adjacent concrete formwork and releasably locked and fixed on the other end. Regarding a joint tool for a concrete separator having a threaded connection part with a rod-shaped separator bar end on the side,
Its purpose is to determine the distance between opposing assembly formworks, i.e.
The object of the present invention is to provide a concrete product whose length can be freely adjusted according to the wall thickness of the concrete product to be manufactured, and which is very advantageous in terms of manufacturing cost.

To be more specific, in the past, as a joint tool for constructing a concrete separator using a rod-shaped separator bar, a joint tool was generally manufactured on the other end side of the flat plate-shaped member separately from the flat strip-shaped member. It was constructed by fixing a cylindrical female screw member by welding, but in this case, there are two product parts and welding work is required, which not only increases the production cost, but also reduces the cost during welding. The drawback was that product yields deteriorated due to thermal distortion and poor welding, which further accelerated the rise in costs.

The joint tool for concrete separators according to the present invention, which was devised in view of the above circumstances, has a locking part that is inserted between the overlapping abutment surfaces of adjacent concrete formworks on one end side and is removably locked and fixed. On the other end side of the flat strip-shaped member, half cylindrical parts are punched out at least two places along the longitudinal direction of the flat strip-shaped member by press working and open in opposite directions in the front and back directions of the strip-shaped member. The inner peripheral surface of these half-cylindrical parts is formed with a female threaded part that can be freely screwed into the male threaded part formed at the end of the rod-shaped separator bar, and has the following structure. We have come to the point where we can expect some effects.

In other words, a cylindrical part for forming a female thread part is formed by screwing together the male thread part of the end of the rod-shaped separator bar so that the entire length of the concrete separator can be freely adjusted according to the wall thickness of the concrete product to be manufactured. , because it is stamped and formed by press working on a flat strip-shaped member having a locking part,
Only one manufacturing part is required, and there is no need for welding at all, and it can be manufactured using high-precision machining such as press working, which not only greatly reduces manufacturing costs, but also improves product yield. Overall, we have been able to achieve a significant reduction in product costs.

Embodiments of the present invention will be described in detail below based on the drawings.

In FIGS. 1 to 3, 2 is a flat strip-shaped member made of steel or the like, and one end thereof is inserted between the overlapping contact surfaces of adjacent concrete formworks 10, 10, as shown in FIG. A locking part 1 with a pin hole 1A that is removably locked and fixed via a U-shaped pin 12 is formed on the other end side at appropriate intervals along the longitudinal direction. At three locations, half cylindrical portions 3A, 3B, and 3B are press-worked, with the intermediate portion and the portions located on both sides opening in opposite directions in the front and back directions of the strip member 2. These half cylindrical parts 3A,
As clearly shown in FIG. 4, the inner circumferential surfaces of 3B and 3B are provided with female threaded parts 3a, 3b, which can be screwed into the male threaded part 11A formed at the end of the rod-shaped separator bar 11 at the same time when they are pressed. 3b is formed. Incidentally, in the middle part of the strip member 2, there are a large number of small hole groups 4 for separating the locking part 1 protruding from the surface of the concrete object after concrete placement, and a rod-shaped separator bar 11 for adjusting the length. A notch hole 5 is formed to allow movement of the end portion.

As shown in FIG. 5, the joint tool J having the above structure inserts the locking part 1 between the overlapping abutting surfaces of the adjacent concrete formworks 10, 10 of the opposing assembly formworks 10, 10, and then inserts the pin 12. By locking and fixing the molds 10, 10, the molds 10 and 10 are held inwardly protruding from each other. The female threaded portions 3a, 3b, 3b of the pair of joint tools J, J held in this way are attached to the male threaded portions 11A, 1 at both ends.
1A are screwed together, the rod-shaped separator bar 11 is spanned, and the assembly forms 10, 1 are assembled.
This is used to pull and support both assembly formworks 10, 10 against the lateral pressure load of the concrete poured between the two.

Another embodiment will be described below.

(1) Tapping may be used as a means for forming the internal threads 3a, 3b, 3b on the inner circumferential surfaces of the halved cylindrical portions 3A, 3B, 3B.

(2) Even if the lengths in the cylinder axis direction of the half-split cylindrical parts 3A, 3B, and 3B are all equal, the cylindrical part 3A located in the middle part is the two cylindrical parts 3B located on both sides,
The length may be equal to or approximately equal to the total length of 3B. Further, the number of half-tubular parts may be four or more.

(3) As shown in FIG. 6, the portion corresponding to the notch hole 5 may be formed into a semicircular concave shape at the same time during press working, and in this case, there is a reinforcing effect on the entire joint tool.

(4) As shown in FIGS. 7 and 8, the notch hole 5
A stopper 6 for positioning a truncated conical member 12 for forming a recess for separating and removing the locking part 1 protruding from the surface of the concrete object may be formed by punching on the side edge of the concrete object closer to the locking part 1. .

[Brief explanation of the drawing]

Fig. 1 is a plan view, Fig. 2 is a side view, Fig. 3 is a front view, Fig. 4 is an enlarged longitudinal sectional side view along the line of Fig. 1, Fig. 5 is a longitudinal sectional side view showing the state of use, 6 to 8 show another embodiment, FIG. 6 is an enlarged longitudinal sectional front view of the main part, FIG. 7 is a plan view, and FIG.
FIG. 3 is a side view of the one shown in FIG. 1...Locking portion, 2...Flat strip member, 3A,
3B...half cylindrical part, 3a, 3b...female threaded part,
10... Concrete formwork, 11... Rod-shaped separator bar, 11A... Male threaded part.

Claims (1)

[Scope of claim for utility model registration] Concrete forms 10, 10 adjacent to each other on one end side
The other end side of the flat strip-shaped member 2 having the locking part 1 which is inserted between the overlapping abutment surfaces and removably locked and fixed thereon is formed by press working at at least two locations along the longitudinal direction thereof. Half cylindrical portions 3 that open in opposite directions in the front and back directions of the strip member 2
A and 3B are stamped and formed, and these half cylindrical parts 3
A joint tool for a concrete separator in which female threaded parts 3a and 3b are formed on the inner circumferential surfaces of A and 3B to which a male threaded part 11A formed at the end of a rod-shaped separator bar 11 can be screwed and connected. The female threaded portions 3a and 3b are the half-tubular portion 3.
The concrete separator joint tool according to claim 1, which is formed simultaneously during the press working of A and 3B.