JPS6229542Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a set of intermediate shafts for formwork for directly attaching tiles, and as long as the width of the gap between adjacent tiles is about the outer diameter of the threaded shaft of the intermediate shaft, the tightening seat can be removed. To provide a set of intermediate shafts that can be reliably fitted into the gaps between adjacent tiles and can be used satisfactorily.

An embodiment of the present invention will be described below based on illustrative drawings. In FIGS. 1 to 3, reference numeral 1 denotes a relay shaft, which includes screw shaft portions 2 and 3 at both ends and a small diameter shaft portion between both screw shaft portions. It consists of 4. 5 is a tightening seat,
Outer diameter d of the threaded shaft portions 2 and 3 in the intermediate shaft 1
The outer diameter d of the small diameter shaft portion 4 of the intermediate shaft 1 is placed at the center of the trapezoidal plate body 6 having a thickness t approximately equal to 1.
An oblong shaft hole 7 having a width w slightly wider than 2 is bored parallel to the plate surface between both the inner and outer end surfaces 8 and 9.

As shown in FIG. 4, the intermediate shaft 1 is made by applying a compressive force p to both side slopes of the plate-like body 6 to bulge the thin part 10 between the shaft hole 7 and both side plate surfaces outward.
The shaft hole 7 is deformed to a size that allows the screw shaft portions 2 and 3 to pass through, and is fitted into the shaft hole 7 of the tightening seat 5 up to the position of the small diameter shaft portion 4. After fitting, when the compressive force p is removed, the thin portion 10 elastically returns to its original parallel approach position, thereby sandwiching the small diameter shaft portion 4.

The relay shaft set constructed as described above is used as follows. That is, as shown in FIGS. 5 to 7, adjacent tiles are spread over a base material 12 such as a plywood board to which tiles 11 are temporarily fixed with double-sided adhesive tape, etc., and a formwork board 13 to which this base material 12 is attached. 11
A through hole 15 having a diameter that allows the threaded shaft parts 2 and 3 of the intermediate shaft 1 to pass through is bored at an appropriate position such as the intersection of the gap 14, and a threaded shaft protrudes from the short side end surface 8 of the tightening seat 5. The screw shaft portion 17 of the separator 16 is concentrically connected to the portion 2 by a long connecting nut 18, and the screw shaft portion 3 of the intermediate shaft 1 is connected to the through hole 15.
The tightening seat 1 is inserted into the inter-tile gap 14 side from the side of the inter-tile gap 14 to fit the tightening seat 1 into the inter-tile gap 14, and the screw shaft portion 3 protruding from the formwork plate 13 has a main body 1 of the formwork tightening hardware.
9 are screwed together.

If the formwork is assembled using the method described above,
Concrete is poured into the casting space inside the formwork plates 13 whose intervals are kept constant by separators 16, and a concrete wall integrated with the tiles 11 is constructed. After this, connect the main body 19 to the intermediate shaft 1
After removing the formwork plate 13 and base material 12, the intermediate shaft 1 is unscrewed from the long nut 18 buried in the concrete and removed. The outer end surfaces of the thin-walled portions 10 on both sides of the attachment seat 5 are pressed outward, and the tightening seat 5 is pushed outward from the concrete. The removed recess of the tightening seat 5 is filled with mortar.

Although one specific example of the tightening seat 5 in the present invention has been illustrated and described, the side shape is not limited to the illustrated trapezoid. For example, the side surface shape may be rectangular. In addition, although the oblong shaft hole 7 is bored in the flat plate-like body, the shape when the oval shaft hole 7 is deformed under pressure so that the threaded shaft portions 2 and 3 of the relay shaft 1 can pass through it, i.e. As shown in FIG. 4, a plate-like body 6 having a shape in which the thin-walled portions 10 on both sides of the shaft hole protrude outward from the left and right is manufactured, and when the tightening seat 5 is fitted into the inter-tile gap 13, both thin-walled portions 10 When the tightening seat 5 is deformed into a flat plate shape that can fit into the inter-tile gap 13 by pressing inward with a fingertip, the shaft hole changes into an oval shape that is elongated in the length direction of the tightening seat 5. It is also possible to configure such that both thin-walled portions 10 displaced to the parallel approach position sandwich the small-diameter shaft portion 4 of the relay shaft 1.

The intermediate shaft set of the present invention can be implemented and used as described above, and by interposing it between the separator 16 and the main body 19, it can be used without applying any tightening force to the tile 11, and can be used to connect the formwork to the formwork. 13 can be securely fixed between the separator 16 and the main body 19, but especially when the small diameter shaft portion 4 is attached to the intermediate shaft 1.
is provided, and the threaded shaft portion 2 of the relay shaft 1 is attached to this portion.
Since the tightening seat 5 made of a plate-shaped body having a thickness approximately equal to the outer diameter of the screw shaft 3 is fitted, the tightening seat 5 can be fitted as long as the width of the gap between the tiles is about the outer diameter of the screw shaft portions 2 and 3. 5
can be set well in the gap between the tiles, and there is no need to widen the gap between the tiles at the tightening seat setting position by pushing aside the tiles as in the conventional method, and concrete can be poured with the tiles arranged in an orderly manner. I can do that.

Incidentally, as an example of using a tightening seat made of a plate-shaped body having a thickness substantially equal to the outer diameter of the threaded shaft portion 2 at both ends of the intermediate shaft 1, for example, the technique described in Japanese Utility Model Application No. 55-69554 is known. It is being In this prior art, the small-diameter shaft portion 4 as in the present invention is not provided between the threaded shaft portions at both ends of the intermediate shaft, but the tightening seat is divided into left and right parts at the intermediate shaft position, and the intermediate shaft 1 and the separator 16 are separated. The pair of left and right tightening seats are connected to the connecting nut 18 to be connected using pins and pin holes.

In other words, although it is possible to use a tightening seat with a thickness that is approximately equal to the outer diameter of the threaded shaft portion at both ends of the intermediate shaft, the tightening seat is divided into two parts and cannot be fitted to the intermediate shaft. Therefore, it is necessary to integrate the tightening seat with the connecting nut 18 as described above. Therefore, not only does the number of parts increase, but also a specially constructed connecting nut for connecting the tightening seat is required, which is inconvenient to handle and increases costs.

However, according to the configuration of the present invention, a shaft hole through which the intermediate shaft passes is provided in the center of a plate-shaped body having a thickness substantially equal to the outer diameter of the threaded shaft portion of the intermediate shaft, and is parallel to the plate surface. A seat is used, and the shaft hole is large enough for the threaded shaft portions at both ends of the intermediate shaft to pass through when the pair of left and right thin-walled portions between the shaft hole and the plate surface are bulged outward. and when the pair of left and right thin-walled portions are in the parallel approach position, the tightening seat is formed into an elongated oval shape in the length direction so as to sandwich the small-diameter shaft portion of the intermediate shaft. Pass the intermediate shaft through the shaft hole with the thin walled parts on both sides of the shaft hole bulging outward as shown in the figure,
Then, when fitting the tightening seat into the gap between the tiles, as described above, the thin-walled parts on both sides of the shaft hole are positioned in a parallel approach position so that the small diameter shaft part of the intermediate shaft is sandwiched between them.
The intermediate shaft can be combined with a tightening seat made of a plate-shaped body having a thickness that is approximately the same as the outer diameter of the threaded portions at both ends of the intermediate shaft. Therefore, it is not necessary to connect the tightening seat to the connecting nut as in the past, so a general commercially available one can be used as the connecting nut, and the number of parts is reduced, making it easy to handle. Cost reduction can also be achieved.

In addition, the plate-like body 6 can be deformed by applying a compressive force p to both side slopes of the plate-like body 6 to cause the thin-walled parts 10 on both sides of the shaft hole 7 to bulge outward, or Since it is only necessary to press and deform the thin-walled portions 10 on both sides, which have been previously molded into an outwardly bulging shape, inwardly, it is sufficient to mold the thin-walled portions 10 with a plastic material having appropriate elasticity such as polyethylene resin. .

[Brief explanation of the drawing]

Fig. 1 is a plan view showing one embodiment of the present invention, Fig. 2 is a sectional view taken along the line A-A, Fig. 3 is a vertical sectional side view of the same part, and Fig. 4 shows the state when the tightening seat is assembled. FIG. 5 is a front view, FIG. 5 is a cross-sectional plan view showing the state of use, FIG. 6 is a longitudinal side view of the same part, and FIG. 7 is a longitudinal front view of the same part. 1... Intermediate shaft, 2, 3... Screw shaft portion, 4...
Small diameter shaft portion, 5... Tightening seat, 7... Shaft hole, 10...
Thin wall portion, 11...Tile, 12...Tile temporary fixing base material, 13...Form plate, 14...Gap between adjacent tiles, 16...Separator, 18...Long nut for connection.

Claims (1)

[Scope of utility model registration request] It consists of a combination of a tightening seat and an intermediate shaft passing through the tightening seat, the intermediate shaft consists of a threaded shaft portion at both ends and a small diameter shaft portion between both threaded shaft portions, and the tightening seat A shaft hole through which the relay shaft passes is provided in the center of a plate-shaped body having a thickness approximately equal to the outer diameter of the threaded shaft portion of the relay shaft, parallel to the plate surface. When the pair of left and right thin-walled portions between the plate surface bulges outward, the size is large enough for the threaded shaft portions at both ends of the intermediate shaft to pass through, and when the pair of left-right thin-walled portions are in the parallel approach position, the tightening A relay shaft set for a formwork for directly attaching tiles, which is formed into an oval shape elongated in the length direction of the seat so as to sandwich the small diameter shaft portion of the relay shaft.