JPH04107345U - Separator for concrete formwork - Google Patents

Abstract

(57) [Summary] [Purpose] To enable length adjustment over a wide range with a simple structure and operation. [Structure] When the screw shafts 12 and 13, which have screws 12a and 13a formed on their outer circumferential surfaces, are stacked in parallel, and the overlapping portions are tightened and connected with the stopper 14, the screw shafts 12 and 13 are formed with screws 12a and 13a on the outer circumference. are meshed with each other to form a strong bond, and by selecting the amount of overlap, the length can be freely adjusted and a wide range of changes in the spacing between the forms 16, 16 can be accommodated.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is based on a separator that fixes concrete formwork at predetermined intervals. This invention relates to a separator for concrete formwork whose length can be easily adjusted.

0002

[Conventional technology]

To construct a concrete structure using concrete formwork, the steps shown in Figure 6 are as follows. Then, separator 2 with cones 1 and 1 attached to both ends is placed between formworks 3 and 3, and the Couplers 5, 5 are screwed and connected to the screw shafts 4 of the cones 1, 1 protruding from the outer surfaces of the frames 3, 3. , by supporting the formworks 3, 3 from the outside with thick timbers, both formworks 3, 3 are placed on opposite sides. Cones 1 and 1 are fixed with a facing interval equal to the distance between them, and between formworks 3 and 3. This is done by placing concrete.

0003 By the way, as shown in FIG. 6, the conventional separator 2 uses a single metal rod, It has a structure in which screws are provided at both ends and the cones 1, 1 are screwed together.

0004

[Problem that the idea aims to solve]

As mentioned above, the conventional separator 2 has a support interval between the formworks 3 and 3 depending on its length. Separators of different lengths must be prepared to accommodate changes in formwork spacing. The problem is that it has to be done.

[0005] In addition, two metal rods are used as separators whose lengths can be adjusted. It has also been proposed that the length can be changed by joining both metal rods using the buckle method, but There is a problem that the adjustment range for the height is extremely narrow and the adjustment work is time-consuming.

[0006] Therefore, this idea was developed to allow the length to be adjusted over a wide range, and the adjustment work is easy. Our goal is to provide separators for concrete formwork.

[0007]

[Means to solve the problem]

In order to solve the above problems, this idea uses multiple threads formed on the outer circumferential surface. The fastener consists of a screw shaft and a stopper that connects the screw shaft in parallel to the axial direction. The metal fitting fixes the overlapping parts of the screw shaft so that the screws on the outer circumferential surface engage with each other. This system adopts a structure that allows for

[0008]

[Effect]

Lay the two screw shafts parallel to each other and connect the overlapping parts with a stopper. Then, the screws on the outer circumferential surfaces of both screw shafts engage with each other, and the separator is assembled into a single unit. In addition, the length can be easily adjusted by selecting the overlapping position of both screw shafts. I can do it.

[0009]

【Example】

Embodiments of this invention will be described below with reference to FIGS. 1 to 5 of the accompanying drawings.

0010 As shown in FIG. 1, the separator 11 has two screw shafts 12 and 13 of appropriate length, and It consists of a stopper 14 that connects the screw shafts 12 and 13 in parallel to the axial direction, and is separated. In the rotor 11, cones 15, 15 are screwed and connected to the ends of screw shafts 12, 13, and are opposed to each other. By supporting the inner surfaces of the formworks 16, 16 with the cones 15, 15, a predetermined gap is formed between the opposing surfaces. of the cones 15, 15 protruding from the outer surfaces of the formworks 16, 16. Couplers 18, 18 are connected to the screw shaft 17.

[0011] Both screw shafts 12 and 13 have the same pitch and slope over the entire length of the outer circumferential surface. The same screws 12a, 13a are formed, and when stacked in parallel, the mutual screws 12a, 1 3a are designed to mesh.

0012 As shown in FIGS. 2 to 5, the stopper 14 has two overlapping screw shafts 12, 13, and a wedge driven into this square cylinder 21. It consists of a combination of bodies 22, and the square cylinder body 21 has a wedge near one end of both sides. Driving holes 23, 23 in the body 22 are provided.

[0013] The separator of this invention has the above-mentioned configuration, and the two screw shafts 12 and 13 are connected to each other. The cones 15 at the ends are stacked in parallel so that the distance between them is the support distance between the formworks 16 and 16. After screwing together, the square cylinder body 21 is externally inserted into the overlapping part of both screw shafts 12 and 13, and as shown in FIG. As shown in FIG. 3, the wedge body 2 2 to press the overlapping portions of both screw shafts 12 and 13 together.

[0014] Both screw shafts 12 and 13 are in a state where the overlapping parts of screws 12a and 13a are engaged. The separator 11 is assembled by crimping and joining together.

[0015] 2 and 3 show that the wedge body 22 is connected to the screw shafts 12 and 13. Although we have shown an example of driving from the axial direction of 3, it is difficult to drive from the above axial direction due to space constraints. If this is difficult, insert the wedge body 22 into the window holes 23, 23 provided in the rectangular tube body 21, as shown in Fig. 4. On the other hand, drive from the direction intersecting the screw shaft 12 so as to connect both screw shafts 12 and 13. It's okay.

[0016] In this way, the separator 11 can be created by selecting the amount of overlapping of both screw shafts 12 and 13. The length can be adjusted steplessly by changing the interval between the formworks 16, 16. It can be applied to a wide range of situations, and the stopper 14 is a wedge body 22 driven type. The overlapping part of the screw shafts 12 and 13 is the same as the other screw 12. Since a and 13a are connected in a meshed state, sufficient strength against the load can be obtained. It will be.

[0017] In addition, if the overlapping parts of both screw shafts 12 and 13 are long, the multiple parts should be fixed with the stopper 1. 4, and the stopper 14 can be connected by driving a wedge body 22 as shown in the figure. It is not limited to the structure, but for example, both screw shafts 12 and 13 can be tightened by tightening bolts. It may also be made to be crimped.

[0018] In addition, cones 15, 15 are attached to the ends of both screw shafts 12, 13, and the formwork 16, 16, but for example, by attaching a washer to the end, or by attaching a washer to the end of the screw shaft. The end portion may be fixed by welding to a steel sheet pile or the like.

[0019] When constructing a longer separator, three or more screw shafts can be connected with a stopper. It may also be formed.

[0020]

【effect】

As described above, according to this invention, multiple screw shafts are superimposed in parallel, and this The overlapping part of the screws is locked with a stopper, so the screw shaft is attached to the overlapping part. The screws mesh with each other to create a strong connection, and the amount of overlap between the screw shafts is selected. This allows the length to be freely adjusted, allowing for a wide range of changes in the spacing of concrete formwork. Can correspond to

[Brief explanation of drawings]

[Fig. 1] Vertical front view showing the usage state of the separator according to this invention

[Figure 2] Enlarged vertical sectional front view of the main parts of the above

[Fig. 3] Longitudinal side view taken along arrow A-A in Fig. 2

[Figure 4] Longitudinal side view showing another example of wedge body driving

[Figure 5] Exploded perspective view of the stopper

[Figure 6] Longitudinal front view of a conventional separator in use

[Explanation of symbols]

11 Separator 12, 13 Spiral shaft 14 Fasteners 15 Cone 21 Square cylinder 22 Wedge body 23 Window hole

Claims (1)

[Scope of utility model registration request] [Claim 1] A plurality of screw shafts formed with threads on the outer peripheral surface,
It consists of a fastener that connects the screw shafts in parallel to the axial direction, and the fastener has a structure that fixes the overlapping parts of the screw shafts so that the screws on the outer circumferential surface engage with each other. Separator for formwork.