JPH0139316Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a spacing holder for formwork used in constructing concrete walls.

The distance between a pair of concrete formworks placed opposite each other to form a concrete pouring space is maintained correctly, and the thick timbers placed on the outside of the formworks are also fixed together to separate both formworks. maintain the position of
Spacing retainers used to stabilize the concrete so that it can withstand the load of concrete have traditionally been made by processing round bars, which have various difficulties in processing and construction. Was.

In other words, processing of the round bar is relatively time-consuming, and it is necessary to drill holes and attach it to the formwork, which may damage the expensive formwork.
Mortar leaks from the holes in the formwork and adheres to the threads of the spacer and other parts, solidifying, requiring extra effort to remove and clean the formwork, or when the formwork is used for other purposes. However, since poured concrete leaks out of the holes drilled in the formwork, the holes have to be closed before use.

In addition, with the conventional one-piece spacing retainer, when constructing a trapezoidal cross-section mountain retaining concrete wall, the opposing formwork is narrow at the top and gradually widens toward the bottom, resulting in a large number of lengths. Different spacing devices are required, and their management and construction require a great deal of effort.

In order to eliminate and solve these drawbacks, expandable spacing devices that have been used in recent years consist of an intermediate connecting member and both end members, which can be connected with pins to obtain various lengths. It is possible to reduce costs by mass producing products of a certain length.

When assembling the formwork, as shown in FIG. The member 4 is attached, and the outer side of the end member is fixed using an L-shaped stopper, and further, the intermediate member 3 is connected and fixed to the end member 4. Note that 7' and 7' are thick pieces placed outside the formwork 1, 7'' is a washer, and 7 is a nut.
This allows the spacing to be kept constant.

The present invention is composed of an intermediate member and both end members as described above, and the U-shaped portions of the end members are formed to have different widths so as to be adaptable to intermediate members of various sizes. Furthermore, by assembling the intermediate member so that it can be engaged from the upper or lower part of the U-shaped portion, assembly is facilitated, and even when the intermediate member is long and wide, Even if it is a thin plate, it can be engaged with the same end member in any case.

Next, the present invention will be explained based on the drawings. The spacing retainer 2 of the present invention has an intermediate member 3 formed by bending a thin steel plate into a U-shaped cross section, a long and narrow groove shape, a rod shape, or a plate shape. As will be described later, a hole is provided at the end of the end member 4 so that it can be attached to the hole in the end member 4 using a pin.

The end member 4 consists of a flat plate-shaped portion 5 that is formed flat so that it can be inserted into a gap in a mold, and an intermediate portion 8 and an end portion 9 that are bent into a U-shape.

In the case of FIGS. 2 and 3, the end member 4 has a middle portion 8 forming a narrow groove-like portion, and an end portion forming a wide groove-like portion 9. As seen in the cross-sectional views of Figure 4 A and B, each groove is
It consists of vertical ribs 10 on both sides and a bottom part 11 forming a curved part connecting the lower parts of the ribs 10, 10. Furthermore, the narrow part 8 of the groove has a rib 1
It has flanges 12 that are widened outward on both sides above the 0 and 10 points. Therefore, this U
The character-shaped members are formed so that both narrow and wide widths can exhibit similar strength.

In addition, the intermediate portion 8 of the end member 4 and the end member 9 both form a pin hole 13 laterally, and this hole is matched with a hole provided in the intermediate member, and both holes are penetrated. By inserting a pin and forming a spacing holder to a predetermined length, the spacing between the formwork can be fixed.

Furthermore, as shown in FIG. 4, in the narrow part like A, the plate-shaped intermediate member 3 is adapted to
A wide portion such as B can be used as a locking portion when an intermediate member 3 formed in a U-shape or the like is used.

In the example shown in FIG. 2, the narrow or elongated intermediate member 3 engages with the entire end member and is fixed at the intermediate portion 8. The end portions 9 are adapted to engage.

Apart from this, in the examples shown in FIGS. 5 and 6, the intermediate portion 8 is formed into a wide U-shape, and the end portions are formed into a narrow U-shape. In this case, the seventh
As shown in the figure, the elongated narrow intermediate member 3 is inserted into the groove from above in the end portion 9, and the hole in the intermediate member 3 and the hole 13 in the end member 4 are aligned in the same position, and then both holes are closed. The intermediate member 3, which is in the form of a wide groove, is inserted and fixed with a pin, and the intermediate member 3, which is in the form of a wide groove, is engaged with the end member from below and fixed as shown in FIG. 7A.

In the present invention, as mentioned above, since the end member forms a U-shaped portion with two types of grooves of different widths, the intermediate member is U-shaped or plate-shaped. It can be applied to any case, such as inserting the intermediate member into the groove of the end member and locking it, or inserting the end member into the groove of the intermediate member and locking it. Both of these can be easily achieved, and in addition, by making two types of end members by changing the width of the grooves between the middle part and the end part, it can be done according to the purpose. It is now possible to use different types of parts, and the two types of end members can be applied to all spacing retainers, making it extremely easy to manage parts on site. Since there is no need to limit them, it is also possible to mix and match conventionally used ones.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram showing the situation during formwork construction;
2 to 4 show the first embodiment, FIG. 2 is a plan view, FIG. 3 is a side view, FIG. 4 A and B are sectional views, and FIGS. An embodiment is shown in which FIG. 5 is a plan view, FIG. 6 is a side view, and FIGS. 7A and 7B are sectional views. DESCRIPTION OF SYMBOLS 1... Formwork, 2... Spacing holder, 3... Intermediate member, 4... End member, 5... Flat plate-like part, 6... Locking hole, 7... Stopper, 7'... End Thick wood, 7″...washer, 7...nut, 8...middle part, 9...end part, 10...rib, 11...bottom part, 12...
Flange, 13...pin hole.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) At both ends of an intermediate member formed by bending a thin steel plate and having a substantially U-shaped cross section, one end is flat and the other end is substantially U-shaped. When connecting members through connectors such as pins, a number of horizontal holes are drilled through the sides of the intermediate member and end member, and the connecting lengths are adjusted in accordance with the width of the concrete formwork. A concrete formwork characterized in that it is variable and the substantially U-shaped end member is formed into a narrow U-shaped part and a wide U-shaped part, so that it can be adapted to various types of intermediate members. spacing retainer. (2) The end member is characterized in that a wide U-shaped part is formed at the end and a narrow U-shaped part is formed in the middle part, so that the elongated intermediate member can be locked at the middle part. Scope of claim for utility model registration No. 1
Spacing retainer for concrete formwork as described in Section 1. (3) The end member has a narrow U-shaped portion at the end and a wide U-shaped portion at the middle, and the wide intermediate member is engaged with the end member from below. A spacing holder for concrete formwork according to claim 1 of the registered utility model claim, characterized in that the spacing holder is made to be able to (4) The narrow U-shaped portion is formed with a flange that expands in the horizontal direction so that it can be used as a reinforcing material. Spacing retainer for concrete formwork.