JPH0430281Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to a separator terminal fitting that is attached to the end of a separator used for assembling formwork for concrete construction.

(Prior Art) Conventional terminal fittings for separators of this type include a device described in Japanese Utility Model Publication No. 45-29412.

(Problem to be solved by the invention) The conventional separator terminal fittings described above consist of a synthetic resin formwork support piece that is screwed onto the male screw at the end of the separator and left inside the concrete wall, and a formwork support piece for the formwork support piece. (1) Due to shrinkage during concrete hardening, etc., the gap between the concrete wall and the formwork piece may deteriorate over time. There will be a pause.

(2) The formwork support piece and the plug do not come into perfect contact with each other, and there is a gap between them.

Therefore, the above space becomes a water supply, and water such as rainwater flows from the wall surface through the space between the concrete wall and the formwork support, and between the formwork support and the stopper, and then flows between the concrete wall and the separator. It penetrates between the separators and causes the separators to rust. As a result, (a) the durability of the structure decreases;

(b) Water containing rust flows onto the wall surface, damaging the aesthetic appearance of the wall surface.

There are problems with these points.

(Means for solving the problem) Therefore, in this invention, in order to solve the above problem by preventing water such as rainwater from penetrating from the wall surface to the separator part in the concrete wall, one side is large. Insert into the center hole of the truncated conical terminal body 1 is a bottomed central cylinder 2, which has a screw 4 connected to the formwork clamping rod 3 at the bottom of one side and a female thread 5 at the inner circumference. A cap 9 has a female thread 8 on its inner periphery into which the male thread 7 at the end of the separator 6 is screwed.A collar 11 with a rotation stopper 10 and a circumferential groove 12 are formed on the outer periphery of the opening of the cap 9, and a male thread 13 is provided on the outer periphery. Its circumferential groove 12
The center hole 15 of the water-swellable water stop plate 14 having a larger diameter than the outer diameter of the other end of the terminal body 1 is fitted into the terminal body 1, and the male thread 13 of the cap 9 with the water-swellable water stop plate 14 is inserted into the bottomed center hole 15 of the water-swellable water stop plate 14. It is screwed into the female thread 5 of the cylinder 2 to constitute the separator terminal fitting a.

(Embodiment) To explain the structure of one embodiment of this invention shown in Figs. 1 to 5, 3 is a formwork clamping rod, a screw hole 16 is provided in the center of the base end, and the tip is A male thread 17 is formed. 6 is a separator, and male screws 7 are provided at both ends.

1 denotes a terminal fitting of the separator 6, and 1 is a truncated conical terminal body with a large diameter on one side, made of synthetic resin or the like, and has a recess 18 formed inside one side. Reference numeral 2 denotes a bottomed center tube made of metal or the like and inserted into the center hole of the terminal body 1, with a screw hole 4 in the center of the bottom on one side and a female screw 5 in approximately half of the opening side of the inner periphery.
A hexagonal operating portion 19 is provided at one end of the outer periphery, and a locking collar 20 is provided at the other end. Reference numeral 9 denotes a cap made of a highly corrosion-resistant material such as ceramics, with a female thread 8 formed at the bottom of one side of its inner periphery, and a female thread 8 formed on the outer periphery of the opening in order from the opening side to the bottom side. A collar 11 that is inclined 21 to form a rotation stopper plane 10 on both sides, and a circumferential groove 1.
2. A circular protrusion 22 is formed, and a male thread 13 is provided in approximately half of the opening side of the outer periphery, and the female thread 8 is provided with a male thread 13.
is located closer to the bottom than the male thread 13. 14 is a terminal body 1 made of water-swellable rubber or the like.
It is a water-swellable water stop plate having an appropriately larger diameter than the outer diameter of the other end, that is, the small diameter end, and has a protrusion 23 on the outer periphery of both sides, and a stepped part in the middle. The water-swellable water stop plate 14 is fitted to the cap 9 by fitting the small diameter hole part of the center hole 15, which is formed in two large and small steps, into the circumferential groove 12 and the large diameter hole part into the protrusion 22, respectively. As shown in FIG. 1, the male thread 13 of the cap 9 with the water-swellable water stop plate 14 is screwed into the female thread 5 of the bottomed central cylinder 2, and the water-swellable water stop plate 14 and the cap 9 are screwed together. One side of the protrusion 22 is brought into contact with the other side of the terminal main body 1 with the bottomed center tube 2 to constitute the terminal fitting a.

Reference numeral 24 denotes a pivot foot, and male screws 25 and 26 are provided at both ends, respectively. Reference numerals 27 and 28 are presser washers and nuts that are attached to the male screw 17 portion of the formwork clamping rod 3.

A is the weir plate of the concrete formwork, and through holes 29 are bored at appropriate locations. B is a vertical beam, C is a horizontal beam made of two pipes, D is a concrete wall, and 30 is a terminal hole after removing the terminal body 1 from the concrete wall A. 31 is the plug for the terminal hole 30;
It is made of synthetic resin or the like and has a fitting hole 32 in the center of its tip.

Next, its effect will be explained. As shown in FIG. 1, the female screws 8 of the cap 9 of the terminal a are screwed into the male screws 7 at both ends of the separator 6, and the screw holes 4 of the center cylinder 2 of the terminal a on both sides of the shaft legs 24 are respectively screwed. Screw together the male screw 26.

Therefore, the shaft feet 24 on both sides are inserted into the through holes 29 of the weir plates A on both sides, and the male screws 2 of the shaft feet 24 are inserted.
5 into the screw hole 16 of the clamping rod 3, and the weir plate A is sandwiched between the terminal body 1 of the terminal fitting a and the clamping rod 3, and the weir plates A on both sides are erected. After that, as usual,
Combine the vertical and horizontal batten materials B and C on the outside of the weir plate A,
When the presser washer 27 is applied to the cross member C and the nut 28 is screwed in, the terminal body 1 and the presser washer 27 tighten and fix the weir plate A and the flap members B and C together to form a formwork. .

Next, concrete is placed in the inner space of the weir plate A to construct the wall D. At this time, due to the tensile force to the outside of the terminal fitting a due to the lateral pressure applied to the weir plate A of the poured concrete, a force acts on the inner circumference of the cap 9 of the terminal body a to pull its bottom side toward the separator 6 side. Since a force acts on the outer periphery to pull its opening side toward the tightening rod 3, the tensile forces of the inner periphery and outer periphery act on each other, and a shearing force is mainly generated in the cap 9, and the tensile force is It almost never occurs.

After that, once the concrete on wall A has hardened, unscrew the nut 28, and then tighten the tightening rod 3 with the male screw 25.
The formwork is disassembled by removing the flaps B and C and the weir plate A. Next, the operation part 1 of the center cylinder 2
When the terminal body 1 with the center tube 2 is removed by engaging the box spanner 9 and unscrewing the center tube 2 from the male screw 13 of the cap 9, the terminal body 1 is attached to the wall D as shown in FIG. 1 terminal trace hole 30 is created. Therefore, as shown in FIG. 5, when the plug 31 is pushed into the terminal trace hole 30, the fitting hole 32 of the plug 31
The tip of the cap 9 is press-fitted onto the male screw 13 of the cap 9, and the plug 31 closes the terminal hole 30. In this case, even if the terminal hole 30 is filled with mortar instead of the plug 31, the mortar bites into the male screw 13 of the cap 9 and is fixed, so that the terminal hole 30 is filled with mortar. occluded by implantation.

Another embodiment of this invention shown in FIG. 6 and FIG.
4 is integrated. That is, a shaft foot 24 ₁ is provided protruding from the center of the bottom surface of the bottomed central cylinder 2 ₁ , and a male screw 25 is provided at the tip of the shaft foot 24 ₁ so that the shaft foot 2
A bottomed central cylinder 2 ₁ with 4 ₁ is configured.

The terminal fitting _a1 having this structure also functions in the same manner as described above.

(Effects of the invention) The separator terminal fitting of this invention has the following remarkable effects.

(1) The end of the separator is completely covered by the cap, and the outer periphery of the water-expandable water stop plate fitted into the cap is buried in the concrete wall, so there are no traces of terminals on the wall surface. Water such as rainwater that permeates between the inner periphery of the hole and its stopper is reliably caught by the cap and the water-expandable water stop plate, and does not permeate into the separator portion. Therefore, (a) Corrosion of the separator is prevented, preventing deterioration of the concrete structure and increasing durability.

(b) There is no risk of water containing rust flowing onto the wall surface and damaging the aesthetic appearance of the wall surface.

(2) A water-expandable water stop plate is located at the bottom of the terminal hole,
In addition, the outer periphery of the water-expandable water stop plate is buried in the concrete wall and thereby acts to stop water from the wall surface to the separator section, so the flange around the opening of the cap can be thin. (a) Materials can be saved.

(b) It is possible to reduce the amount of foreign objects buried in concrete walls.

(3) Since the cap's collar and the outer periphery of the water-expandable water-stop plate are buried within the concrete wall, the installation of the cap and the water-expandable water-stop plate is reliable and solid.

(4) Since a rotation stopper is formed on the flange buried in the concrete wall of the cap, when the terminal body with the center tube of the terminal fitting is rotated and removed after the formwork is dismantled, the cap is securely supported by the concrete wall and rotates. The main body of the terminal with the center tube can be removed smoothly and satisfactorily without having to do so.

(5) By using a water-expandable waterstop, when water that permeates from the wall surface into the concrete wall hits the water-expandable waterstop, the waterstop expands and presses strongly against the concrete wall and cap. and between them
It securely seals the gap between the concrete wall and the cap, and promotes the water-stopping effect between the concrete wall and the cap.

(6) Since a male screw is provided on the outer periphery of the part of the cap that protrudes into the terminal hole, the plug, mortar, etc. that plugs the terminal hole will bite into the male screw of the cap, ensuring secure and firm installation.

(7) It has a simple structure and can be manufactured easily and inexpensively.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal front view of a concrete wall formwork assembled using a separator terminal device according to one embodiment of this invention, Fig. 2 is an exploded front view of the dam support part of the formwork, with the upper half cut away. Fig. 3 is one side view of the terminal device, Fig. 4 is the other side view, Fig. 5 is a front sectional view of the formwork removed and the terminal hole plugged with a plug, Fig. 6 is a front sectional view of the formwork dam supported by a separator terminal device according to another embodiment of this invention, Fig. 7 is a front view of the terminal body with a bottomed center tube, with the upper half cut away. a...separator terminal device, 1...terminal body, 2...bottomed center tube, 3...formwork tightening rod, 4...
...Screw, 5... Female thread, 6... Separator, 7
……Male thread, 8……Female thread, 9……Cap, 1
0: Stopper, 11: Guard, 12: Groove, 1
3: Male screw; 14: Water-swellable waterstop; 15:
...Centre hole.

Claims (1)

[Scope of utility model registration request] In the center hole of the truncated conical terminal body, which has a large diameter on one side, there is a screw connected to the formwork tightening rod at the bottom of one side.
A bottomed center cylinder with a female thread on the inner periphery is inserted, and a non-rotating flange and a circumferential groove are formed on the outer periphery of the opening of the cap, which has a female thread on the inner periphery to which the male thread at the end of the separator is screwed. A male screw is provided on the outer periphery of the cap, and a center hole of a water-swellable waterstop plate having a diameter larger than the outer diameter of the other end of the terminal body is fitted into the circumferential groove of the cap, and the water-swellable waterstop plate is fitted with the water-swellable waterstop plate. A separator terminal fitting in which the male thread of the cap is screwed into the female thread of the bottomed center cylinder.