JPH0242827Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) The present invention relates to an auxiliary tool for supporting concrete formwork, which is used together with a separator when supporting concrete formwork on H-shaped steel, etc. that constitute an earth retaining wall. .

(Prior art and its problems) When a concrete formwork is supported by an H-shaped steel etc. that constitutes an earth retaining wall, the inner end of the separator whose outer end is connected to the concrete formwork must be connected to the H-shaped steel etc. No. In this case, so that the distance between the H-shaped steel and the concrete formwork can be adjusted,
Since the connecting position of the inner end of the separator must be adjustable in the axial direction of the separator, conventional auxiliary tools of this type require a cylindrical body of an appropriate length to be fitted and fixed onto the edge of H-beam steel, etc. A screw hole was formed at the free end of the cylindrical body, and the inner end screw shaft of the separator could be screwed into the screw hole to any desired depth.

In such conventional auxiliary tools, when the auxiliary tool is attached to the edge part of the H-shaped steel, the cylindrical body protrudes long from the H-shaped steel, and the arrangement between the H-shaped steel and the concrete formwork becomes difficult. The cylindrical body gets in the way when performing reinforcement work, making it impossible to perform reinforcement work safely and efficiently.

(Means for solving the problems) The present invention proposes an auxiliary device that can solve the conventional problems as described above, and its features are as follows:
It consists of a length-adjusting rod with a screw hole for connecting a separator at the outer end and a bulging head at the inner end, and a U-shaped body, and the U-shaped body has one leg. A leaf spring having a pressing and fixing action part that slopes diagonally inward from the free end side of the leg is attached to the inside of the leg, and further extends between the plate connecting both legs and the leaf spring mounting leg. , an inner end portion with a bulged head of the length adjusting rod located parallel to the length direction of the plate portion has a bent keyhole-like engagement hole that can be freely fitted and removed in the length direction of the leg portion. It is at the point that I have set.

(Example) An example of the present invention will be described below based on the attached illustrative drawings.

In Figures 1 to 3, reference numeral 1 is a shaft rod for adjusting the length, and the outer end of the round pipe 2 is reduced in diameter to an appropriate length, and a thread groove is machined on the inner surface to connect the separator. It has a screw hole 3 and a bulging head 4 formed at the inner end. This bulging head 4 can be formed, for example, by the head of a bolt 5 fixedly connected to the inner end of the round pipe 2 as shown. The bolt 5 is fixed by inserting the tip of the screw shaft into the round pipe 2 and reducing the diameter of the inner end of the round pipe 2 so that it bites into the thread groove of the bolt screw. However, the bolts 5 may be fixed to the round pipe 2 by welding. 6 is a diameter-reduced portion for bolt fixing.

7 is a U-shaped main body, and its pair of legs 8
Among legs 8a and 8b, one leg 8a has a
The cross-sectional shape of a is pressed into a shallow flanged groove shape, and a concave groove 9 is formed on the inner side in the longitudinal direction. Reference numeral 10 denotes a leaf spring having a width that allows it to fit into the recessed groove 9, and one end 10a of the leaf spring is fitted into the recessed groove 9 by a rivet 11 to hold the leg portion 8.
a, and the other end forms a pressing fixing action part 10b that slopes diagonally inward from the free end side of the leg part 8a.

Reference numeral 12 denotes an engagement hole into which the inner end portion 1a with a bulged head of the length adjustment shaft rod 1 engages, and the both leg portions 8a,
8b and the plate spring mounting leg 8.
a bent narrow elongated hole portion 12a formed across a
and an enlarged hole portion 12a formed at the end of the long hole portion 12a on the plate portion 8c side and into which the bulged head 4 of the length adjusting shaft rod 1 can go in and out, and the narrow bending width length The hole portion 12a is provided with the length adjustment shaft rod 1.
The small diameter shaft portion (threaded shaft portion of the bolt 5) adjacent to the bulging head 4 in the bolt 5 has a width that allows free movement.

To explain how to use it, as shown in Figs. 2 and 3, the U-shaped main body 7 is fitted from the side into the edge part 13a of the H-shaped steel 13 constituting the earth retaining wall so that the leg part 8a is on the outside. Match. At this time, leaf spring 1
The tip 10c of the pressure fixing action part 10b of 0 and the leg part 8
A is configured such that the gap between the inner surface of the edge portion 13a and the inner surface of the edge portion 13a is smaller than the plate thickness of the edge portion 13a. The U-shaped main body 7 is pressed in and fitted. The fitted U-shaped main body 7 is fixed to the edge portion 13a with the leg portion 8b in contact with the edge portion 13a by the elastic restoring force of the pressing and fixing action portion 10b of the leaf spring 10.

Once the U-shaped main body 7 is installed as described above, reinforcement work is performed between the H-shaped steel 13 and the concrete formwork, and then the inner end screw shaft is inserted into the screw hole 3 for connecting the separator as shown in the figure. The inner end 1a of the length adjusting shaft 1 to which the separator 14 has been connected is engaged with the engagement hole 12 of the U-shaped main body 7 by screwing the parts 14a to an appropriate depth so that the total length becomes a predetermined length. Match. That is, the bulging head 4 enters the inside of the U-shaped main body 7 through the enlarged hole 12b, and at the same time, the small diameter shaft portion (the helical shaft of the bolt 5) adjacent to the bulging head 4 is bent into the narrow elongated hole 12a. to fit. Then, the concrete formwork 15 is placed, and the separator 14
The outer end of the concrete formwork 15 and the concrete formwork 15 are connected to each other using various types of fastening hardware 16 known in the art.

In the above-mentioned state of use, the length adjusting rod 1 is pulled in the direction away from the U-shaped main body 7, so its bulging head 4 is pulled away from the U-shaped main body 7.
The length adjusting shaft 1 cannot be removed from the engagement hole 12 unless the length adjusting shaft 1 is pushed back slightly into the U-shaped main body 7. At this time, if the configuration is such that the rectangular bulging head 4 using the bolt head fits into the recessed groove 9 and the rotation of the length adjustment shaft rod 1 is prevented as shown in the figure, then the length adjustment can be performed. When the separator 14 is rotated and expanded/contracted with respect to the screw hole 3 of the length adjustment shaft 1 after the length adjustment shaft 1 is connected to the U-shaped main body 7, the length adjustment shaft 1 does not rotate together. convenient.

Further, as shown in FIG. 4, one end 10a of the leaf spring 10 is extended toward the plate portion 8c, and this leaf spring extension 10d allows the length adjustment shaft 1 to enter from the enlarged hole 12b. If the bulging head 4 is configured to be press-fitted into the recessed groove 9, the length adjustment shaft 1 connected to the U-shaped main body 7 will not come off unexpectedly before being connected to the formwork 15. It is possible to prevent it from collapsing.

(Operations and Effects of the Invention) As described above, according to the concrete formwork supporting aid of the present invention, only the U-shaped main body separated from the length adjustment rod can be attached to the H-shaped steel or the like before reinforcing work. After the reinforcement work is completed, the length adjustment shaft rod can be connected to the U-shaped main body from between the reinforcing bars. Therefore, the length adjustment shaft does not become an obstacle during reinforcement work, and the reinforcement work can be performed safely and easily. Moreover, the work of attaching the U-shaped main body to an H-shaped steel etc. can be done with one touch using the pressing and fixing action part of the leaf spring, and the work of connecting the length adjustment shaft rod to this U-shaped main body can also be done with a single touch. This can be done with a one-touch operation by simply fitting the bulging head-equipped inner end of the length adjustment shaft into the bent keyhole-shaped engagement hole of the U-shaped main body, making the entire work extremely efficient. I can do it well.

Furthermore, by simply providing an appropriate amount of play between the engagement hole of the U-shaped body and the inner end with the bulged head of the length-adjusting shaft, the length-adjusting shaft can be attached to the U-shaped body. The rod can be tilted in any direction. Therefore, even if a reinforcing bar is located in front of the coupling position of the length adjusting rod of the U-shaped main body, the length adjusting rod can be used in an inclined state.

[Brief explanation of drawings]

Fig. 1 is a perspective view, Fig. 2 is a partial cross-sectional plan view showing the state of use, Fig. 3 is a cross-sectional plan view showing an enlarged main part of Fig. 2, and Fig. 4 is a main part showing a modified example. FIG. 1...Length adjustment shaft rod, 1a...Inner end with bulging head, 3...Screw hole for separator connection, 4...
...Bulging head, 5... Bolt, 7... U-shaped body, 8a, 8b... Pair of legs, 8c... Plate connecting both legs, 9... Concave groove, 10... Leaf spring ,1
0b...Press fixing action part, 12...Bent keyhole-shaped engagement hole, 12a...Bending narrow elongated hole part, 12b...Enlarged hole part, 13...H-shaped steel, 14...Separator, 15... Concrete formwork, 16... Clamping hardware.

Claims (1)

[Scope of utility model registration request] It consists of a combination of a length adjusting shaft having a screw hole for connecting a separator at the outer end and a bulging head at the inner end, and a U-shaped body, and the U-shaped body includes:
A leaf spring having a pressing and fixing action part that slopes diagonally inward from the free end of the leg is attached to the inside of one of the legs, and a plate that connects both legs and the leaf spring mounting leg are attached. In addition, an inner end portion with a bulged head of the length adjusting shaft located parallel to the length direction of the plate portion has a bent keyhole shape that can be freely fitted and removed in the length direction of the leg portion. An auxiliary tool for supporting concrete formwork that has engagement holes.