JPS639737Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention has a hollow shell that has an opening periphery that can be brought into close contact with the inner surface of the formwork and an insertion hole at the end of the concrete separator, and is provided with a hollow shell that can swing around at least one axis. In this state, the female threaded member for connecting the concrete separator is pivotally held, and the other end of the band plate member having a pin hole for connection with the formwork at one end is wrapped around the shaft portion on both sides of the female threaded hole of this female threaded member. The present invention relates to a concrete separator end treatment member in which the band plate member is pivotally connected to the shaft portion by folding and fixing the folded and overlapping plate portions to each other via pins.

This type of concrete separator end treatment member is a plate member for attaching the separator end to the formwork that protrudes outside from the surface of the cast concrete body in the demolded state, from the surface of the concrete body. It is used to form a recess on the surface of a concrete structure that can be completely covered with a rust-preventing material such as mortar, which is cut inside and the cut end is later filled with mortar or other anti-rust material. In the case where the front and back surfaces of the molds are formed to be non-parallel to each other, it can be effectively used to pull and support formworks facing each other in an inclined posture.

Accordingly, in the configuration described above, in the band plate member to which the overlapping plate portions are fastened to each other via pins, the substantial cross-sectional area of the cross-sectional portion including the pin insertion hole is reduced due to the formation of the pin insertion hole. Due to the combination of this and the stress concentration due to the notch effect, the tensile strength of the poured concrete against lateral pressure decreases considerably.
Breakage is likely to occur from there. Under these circumstances, in order to give the treated member a tensile strength comparable to that of the concrete separator, it is necessary to increase the thickness of the strip member considerably. Since the strip member is sandwiched between adjacent formworks, the gap between the adjacent formworks becomes large, leading to the disadvantage that part of the poured concrete 1b leaks from the gap.

In view of the above circumstances, the present invention uses simple processing means to construct the band plate member as thin as possible, while having sufficient tensile strength at the pin insertion hole portion. There is a purpose in what you offer.

A characteristic configuration of the concrete separator end treatment member according to the present invention, which has been made to achieve the above object, resides in that at least one pin insertion hole in the folded overlapping plate portion of the strip member is burred.

The effects of the present invention having such a characteristic configuration are as follows.

That is, by performing burring on the pin insertion hole, the wall thickness of the pin insertion hole, which causes a decrease in tensile strength, can be substantially increased while keeping the band plate member as a thin plate. It becomes possible to
Therefore, by adopting a thin plate structure, the mutually contradictory issues of ensuring good prevention of leakage of concrete outside the formwork and increasing tensile strength can be achieved all at once by adding a simple process. I came to the solution.

Hereinafter, embodiments of the present invention will be described based on the drawings.

Fig. 1 shows the construction state of the concrete separator end treatment member A, and 6 is a separator formed in the shape of a round bar with its end having a male screw for screwing into a female screw member 2 to be described later. Opposed formwork 5 with part processing member A installed on both ends.
passed between. The end treatment member A is held in contact with the formwork 5 on the concrete pouring space side.

The configuration of the end treatment member A will be described in detail based on FIGS. 2 to 4. It includes a hemispherical or nearly hemispherical peripheral wall surface portion 1C, an opening peripheral edge 1A that can be brought into close contact with the inner surface of the formwork 5, In the hollow shell body 1 made of hard synthetic resin (for example, styrene) having the end insertion hole 1B of the concrete separator 6, there is a movable member at a position corresponding to the spherical center of the peripheral wall surface portion 1A, which is swingable around the horizontal axis a. In this state, the round bar-shaped concrete separator connection female screw members 2 are fixed to the inner wall of the peripheral wall surface portion 1C, and are pivoted by support plate-like members 7 that protrude toward the internal space, respectively, toward the other side. In addition to supporting the female screw member 2, a pin hole 3A for connection with the formwork 5 is provided at one end of the shaft portion 2B on both sides of the female screw hole 2A.
By wrapping and folding the other end 3B of the band plate member 3 having the above, and fixing the folded overlapping plate portion 3b via pins 4, the band plate member 3 is attached to the shaft portion 2B. It is pivotally connected.

End insertion hole 1 of the concrete separator 6
B is formed as a long hole that allows the female screw member 2 and the concrete separator 6 to swing, and a movable plate 8, which will be described later, is provided on both sides of the long hole 1B on the inner surface of the peripheral wall surface 1A of the hollow shell 1. Slidably held members 9 having an L-shaped cross section are arranged symmetrically. The movable plate 4 is slidably held by the L-shaped member 9 while tightly inserting the round bar-shaped end of the concrete separator 6 to prevent concrete from entering. The elongated hole 1B is kept closed over the entire swing range of the female screw member 2 and the concrete separator 6.

As shown in FIG. 5, at least one pin 4 insertion hole 3a of the folded overlapping plate portion 3b of the band plate member 3 is burred.

As shown in FIGS. 6 and 7, one of the through-holes 3a subjected to burring may be internally engaged with the other through-hole 3a. In this case, since the burring portions are fitted together, the tensile strength can be further improved.

The strip member 3 is inserted into the U-clip 7 with one end thereof inserted between the adjacent formworks 5 and the connecting pin hole 3A aligned with the hole 5a formed in the adjacent formwork 5. It is then locked and fixed. The connecting pin hole 3A may be subjected to burring processing, and the connecting pin hole 3A may be configured to be fitted into the hole 5a formed in the formwork 5.

Although not shown in the figure, the separator 6 may be constructed from one piece, either round bar shaped as a whole or flat plate shaped in the middle and round bar shaped at both ends, or it may be constructed from two pieces, with the middle piece being a flat plate material, angle material, or a member with a T-shaped cross section, and the both ends being round bar shaped, and both pieces may each have a plurality of engagement holes for adjusting the length.

[Brief explanation of the drawing]

The drawings show an example of the end treatment member of a concrete separator according to the present invention, and FIG. 1 is a vertical side view showing the construction state, FIG. 2 is an overall rear view, and FIG.
The figure is an overall front view, Figure 4 is an overall longitudinal side view, and Figure 5 is an overall front view.
The figure is an enlarged vertical sectional view of the main part, and Figures 6 and 7.
The figures are enlarged vertical cross-sectional views of main parts showing different embodiments. 1...Hollow shell body, 1A...Opening periphery, 1B...
...End insertion hole, 2...Female thread member, 2A...Female thread hole, 2B...Shaft portion, 3...Strip plate member, 3A...
Connecting pin hole, 3B...other end, 3a...insertion hole, 3b...polymer plate portion, 4...pin, 5...formwork, 6...concrete separator, a...shaft core.

Claims (1)

[Scope of utility model registration request] A concrete separator is placed in a hollow shell 1 having an opening periphery 1A that can be brought into close contact with the inner surface of the formwork 5 and an end insertion hole 1B for the concrete separator 6, in a state that it can freely swing around at least one axis a. The female threaded member 2 for connection is pivotally supported, and the shaft portions 2B and 2B on both sides of the female threaded hole 2A of this female threaded member 2 are
By wrapping the other end 3B of the band plate member 3, which has a pin hole 3A for connection with the formwork 5 on one end, folding it back, and fixing the folded overlapping plate portion 3b and the same piece through the pin 4. , in a concrete separator end treatment member in which the strip plate member 3 is pivotally connected to the shaft portion 2B, at least one pin 4 insertion hole 3a of the folded overlapping plate portion 3b of the strip plate member 3 is inserted. Concrete separator end treatment member with burring processing.