JPS637645Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a formwork assembly tool used when pouring corkcrete in concrete construction, reinforced concrete construction work, and civil engineering work.

Conventionally, in assembling this formwork, which is generally called a panel, a large number of square steel pipes are used to support the formwork, and various fasteners are used to fix the square steel pipes to the formwork. was.

However, since square steel pipes are long, they are extremely heavy, and with the shortage and aging of workers, formwork assembly work is inefficient and is a cause of increased costs.

In order to minimize the use of square steel pipes and facilitate the assembly of formwork, the applicant previously filed an application for the invention of a "formwork assembly tool" (Utility Application No. 57-
043533).

That is, there is a connecting rod with a male thread, the head of which is provided with a female thread for separator screwing, the bottom surface of which has a cap that can be brought into close contact with the formwork, and the connecting rod which has an upper surface that can be brought into close contact with the formwork over a wide area. A fixing base having a hole for insertion, and a fastener having a female thread that engages with the male thread of a connecting rod inserted into the hole of the fixing base so that the formwork can be pressed between the bottom surface of the cap and the top surface of the base plate. It is what it is.

However, with this formwork assembly tool, the length of the connecting rod must be longer than the sum of the thickness of the formwork, the thickness of the base plate, and the thickness of the fasteners, so when dismantling the formwork, the connecting rod must be The disadvantage was that it was somewhat difficult to remove from the formwork.

Furthermore, since the connecting rod, fixing base, and fastener are not integrally constructed, but are separate, transportation and assembly operations are somewhat inconvenient.

Therefore, this invention uses a commercially available separator connector with a short shaft called polycon or rubber con in place of the connecting rod, and integrally accommodates the rotary fastener in a table-like body corresponding to a fixed base. The purpose is to eliminate the shortcomings of the invention.

This invention will be explained in detail below based on illustrated embodiments.

In FIGS. 1 and 2, reference numeral 1 indicates a truncated quadrangular pyramid-shaped main body. This main body 1 is formed into the above-mentioned shape so that the bottom surface 2 is in close contact with the formwork over as wide an area as possible, and the top surface is in close contact with the two square steel pipes, and in order to reduce the weight. , but is not limited to the examples. In addition, the length of one side of the bottom surface 2 is
It is convenient if the holes are determined to help determine the spacing when the holes for inserting the separator connectors are formed through the formwork.

The material is preferably hard plastic in order to utilize elasticity when fitting the fastener described later into the main body so that it does not fall off, and in terms of strength and weight.

Reference numeral 4 denotes a fastener accommodating opening, which is recessed in the center of the upper surface 3 of the main body. Reference numeral 5 denotes a shaft housing hole for the fastener, which extends from the center of the housing opening 4 to the bottom surface 2 of the main body. A plurality of small protrusions 6 are provided on the inner circumferential surface of the shaft receiving hole 5, but instead of the small protrusions, ring-shaped protrusions may be provided.

7 is a metal or hard plastic fastener;
A home tie locking portion 9 and a rotation locking portion 11 are provided on a disc-shaped base plate 8, and a shaft 12 is provided at the bottom.

The home tie locking portion 9 is installed in the center of the base plate 8, and its head protrudes outward in the shape of a nail head or mushroom so that the two-pronged home tie locking portion can be locked. As shown in FIG. 3, the screw-in type home tie is provided with a male thread 10 for screwing the female thread of the home tie.

The rotation locking portions 11 are for rotating the fastener by placing a finger or the like, and four (or three) rotation locking portions 11 are implanted in the outer peripheral portion of the base plate 8 in the radial direction.

The shaft 12 is provided below the substrate 8 and has a female thread 13 for screwing the male thread of the separator connector from below. Reference numeral 14 denotes a groove, which is provided on the outer periphery of the shaft 12 and into which the aforementioned small protrusion is fitted.

By fitting this fastener 7 into the main body and locking the small protrusion 6 of the main body to the groove 14 of the fastener 7, the fastener can be rotatably accommodated in the main body without falling off. do. In order to allow the fastener to rotate freely and not fall off from the main body, grooves may be provided on the main body and small protrusions may be provided on the fastener. , a slight taper is provided upwardly, and a correspondingly tapered upwardly is provided on the outer periphery of the base plate 8 and the rotation locking portion 11 of the fastener, A fastener may be fitted into the main body. In addition,
Known means can also be used.

In addition, since the fasteners need to be placed in close contact with the formwork,
Make sure that it does not protrude from the bottom surface 2 of the main body. Moreover, if the square steel pipe is made not to protrude from the upper surface 3 of the main body, the square steel pipe can be brought into close contact with the upper surface.

Next, we will discuss the functions and effects of this invention.

First, as shown in FIG. 4, a connector 16 with a separator 15 screwed onto its head is inserted into a hole formed through the formwork 17. Place the bottom surface 2 of the main body 1 against the formwork 17, and screw the male thread 16' of the connector 16 into the female thread 13 of the fastener by rotating the rotation locking part 11 of the fastener 7 with your fingers. Body 1 to formwork 1
7, and connect the formwork with a separator.

In areas where it is necessary to use square steel pipes to correct the alignment of the formwork, as shown in FIG. 9, the square steel pipe 19 is placed on the upper surface 3 of the main body, and the wedge 20 is driven into the wedge hole of the home tie to fix it. When using a screw-in type home tie, the female thread of the home tie may be screwed into the male thread 10 of the tie locking portion of the fastener.

FIG. 6 shows an example of formwork assembly. Since the bottom surface of the main body 1 is in pressure contact with the formwork 17 over a wide area, it can be used even with old formworks, and there is no deformation of the formwork. In order to straighten the formwork, it is only necessary to use the square steel pipe 19 and the crosspiece 21 in a part.

As detailed above, the formwork assembly tool of this invention has the main body and fastener integrated, so it is convenient for transportation and formwork assembly work, and it is convenient for use with square steel pipes, unlike conventional square steel pipes. Overuse can be avoided as much as possible. Furthermore, the formwork can be dismantled efficiently.

[Brief explanation of the drawing]

Fig. 1 is a front view, Fig. 2 is an enlarged cross-sectional view taken along line A-A, Fig. 3 is a cross-sectional view of the main part of another embodiment, Fig. 4 is a partially cutaway plan view showing the separator in use, Fig. 5 is a partially cutaway plan view showing the square steel pipe in use, and Fig. 6 is a schematic front view showing the formwork assembled. 1: main body, 2: bottom surface, 3: top surface, 7:
Fastener, 8... base plate, 9... home tie locking portion,
11: Rotation locking portion, 12: Shaft, 13: Female screw, 15: Separator, 16: Connector, 1
7...formwork, 18...home tie, 19...square steel pipe.

Claims (1)

[Scope of utility model registration request] It is composed of a main body 1 and a fastener 7, and the bottom surface 2 is
Table-shaped main body 1 formed in a formwork so that it can be closely covered over a wide area
There is a home tie locking part 9 into which a locking part of a two-pronged home tie can be inserted and locked from the outside of the top surface 3 of the main body, or a locking part of a screw-in type home tie can be screwed into the locking part 9 and a finger. The fastener has a rotational locking part 11 on the upper part that locks the fastener and rotates the fastener, and has a female thread 13 on the lower part that can screw the male thread of the separator connector from the outside on the bottom surface 2 of the main body. A formwork assembly tool in which a tool 7 is housed rotatably but not detachably.