JPH0247468A - Sleeve tube - Google Patents

Abstract

PURPOSE:To facilitate the change of sleeve length by bending properly free ends of belt plates to the side of the outer periphery of an outer tube when fitting the outer tube to an inner tube with the belt plates fixed to the outside end of the inner tube placed between the two tubes. CONSTITUTION:An inner tube 3 is inserted deeply into an outer tube 2 to form a short and integrated sleeve 1. The sleeve 1 is then placed at a fixed place between mold panels P. Then the outer tube 2 and the inner tube 3 are pulled respectively toward the outsides and each end of the two tubes is fitted against each of the panels P. Free ends of belt plates 4 fixed to the outside of the inner tube 3 are bent to the side of the outer periphery of the outer tube 2, and the outer tube 2 is held to the outer periphery of the inner tube 3 at the bent part of the belt plates. 4.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a sleeve pipe for forming a through hole for piping or the like in a concrete wall surface.

(Prior art and its problems) Conventionally, walls of buildings, etc. have been constructed by arranging formwork panels and pouring concrete between the formwork panels. In order to form through holes such as, a pipe member that has been formed to the thickness of the conch notebook wall is placed in a predetermined position, and then concrete is poured and the pipe member is used to form a hole in the concrete wall. A through hole was formed. However, the pipe members need to be securely attached to the formwork panel at a predetermined position before pouring the concrete wall, which has traditionally been difficult to do, and it has also been difficult to install the pipe members in various sizes to accommodate the thickness of the concrete wall to be formed. There was a problem with having to prepare things.

(Means for Solving the Problems) The present invention has been devised in view of the above-mentioned conventional problems, and provides a sleeve pipe that can easily form a through hole corresponding to the thickness of a concrete wall. The gist of the sleeve pipe is to form a through hole in a concrete wall to be cast and shaped, and the sleeve pipe includes an outer pipe and an inner pipe that can protrude into and out of the outer pipe. It consists of an inner tube that is fitted, and a band plate made of stainless steel or the like is placed along the longitudinal direction on the outside of the inner tube with its tip fixed, and the band plate is clamped. When the outer tube is inserted into the inner tube, the dimensions of the sleeve tube are determined by appropriately bending the free end of the strip toward the outer circumference of the outer tube.

(Function) A strip plate is disposed along the longitudinal direction on the outside of the inner tube constituting the sleeve tube, and when integrating the inner tube and outer tube, the free end side of this strip plate can be bent appropriately. Accordingly, the degree of insertion of the outer tube into the inner tube is determined, and the dimensions of the sleeve tube can be determined. Therefore, when pouring concrete, the inner and outer tubes are inserted deeply and their dimensions are shortened, and a sleeve tube is placed between the formwork panels.
At a predetermined position, pull the inner and outer tubes outward to bring the ends of the outer and inner tubes into contact with the formwork panel, and in this state bend the strip to the outside of the outer tube to separate the outer and inner tubes. It is the best to integrate with! The sleeve pipe can be firmly disposed at a predetermined position between the formwork panels without becoming short.

(Example) Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 shows an exploded perspective view of the sleeve tube 1 of this example. The sleeve tube 1 includes a cylindrical outer tube 2 made of stainless steel or the like, and a diameter slightly smaller than the outer tube 2. , and a similar cylindrical inner tube 3 made of stainless steel, and a plurality of reinforcing ribs 2a, 2a, 2a are formed on the outer periphery of the outer tube 2 to protrude outward. Similarly, a rib 3a projecting outward is formed at the tip of the inner tube 3.

In this example, a flat stainless steel band plate 4 is arranged along the longitudinal direction on the outside of the inner tube 3.
is formed to be considerably longer than the length of the inner tube 3, and its tip end is fixed to the outside of the inner tube 3 by means such as welding, and the other end is a free end. There is. Therefore, when the outer tube 2 is fitted to the inner tube 3, the strip plate 4 is placed between the inner tube 3 and the outer tube 2.

As shown in Fig. 2, when modeling the concrete 1/wall surface, a pair of formwork panels P and P are arranged, and this Jψ,
Concrete is placed between one frame panel P and P to form a concrete wall, and this example is used when forming horizontal through holes for piping or wiring in the concrete wall to be formed. A sleeve pipe 1 can be used, and the outer pipe 2 and inner pipe 3 of the sleeve pipe 1 are integrated into a short size that allows deep insertion, and are placed at a predetermined position between the formwork panels P, P. With the arrangement permitted, pull the outer tube 2 and inner tube 3 outward, bring their tips into contact with the formwork panels P, P, and easily position the sleeve tube 1 between the formwork panels P and P. can be placed accurately. In this state, by bending the free end side of the strip plate 4 toward the outer circumference side of the outer tube 2, the outer tube 2 is locked at a predetermined position on the outer circumference of the inner tube 3 at the bent portion of the strip plate 4. Therefore, even when a considerable pressing force is applied in the axial direction, the bent portion of the band plate 4 is firmly held, and the fitting dimensions of the inner tube 3 and the outer tube 2 can be maintained.

In FIG. 2, the needle member 5.5 is fitted into the tip of the outer tube 2 in advance, and when the sleeve tube 1 is placed at a predetermined position on the formwork panels P, P, the outer tube 2 is inserted into the needle member 5.5. Needle members 5, 5
It can be firmly fixed to the formwork panel P through the nailing, and a more firmly fixed state can be obtained.

When concrete is placed between the formwork panels P and P after the sleeve pipe 1 is placed between the formwork panels P and P, the sleeve pipe 1 is buried in the concrete wall to be formed, and the sleeve pipe 1 A good lateral through hole is formed by this.

In this example, a case where horizontal through holes are formed in a concrete wall is illustrated, but vertical through holes (drain holes, etc.) can also be formed easily in the same way. Incidentally, when trying to maintain the insertion dimensions of the outer tube 2 and the inner tube 3 more firmly, the number of the strip plates 4 disposed is increased, and a plurality of strip plates 4 are arranged in the longitudinal direction outside the inner tube 3. can be placed.

In addition, when forming a through hole deep between the formwork panels P, P, it may be difficult to install the sleeve pipe 1 in an accurate position, so it may be difficult to install the sleeve pipe 1 in an accurate position. The tube 3 can be constructed by pasting a sticker with a scale in the longitudinal direction, and the dimensions are determined in advance based on the scale of the seal, and the band plate 4 is bent to adjust the insertion dimensions of the inner tube 3 and outer tube 2 to the predetermined dimensions. Formwork panel P with the setting determined.

It is also possible to install it between P. Note that the inner diameter dimensions of the outer tube 2 and the inner tube 3 can be set to various values, and the length can also be changed in design.

In this way, in this example, the insertion dimensions of the outer tube 2 and the inner tube 3 can be determined only by appropriately bending the free end side of the strip plate 4, so that the insertion dimensions can be determined according to the thickness of the concrete wall to be cast. It is possible to easily change the dimensions of the sleeve pipe 1 and arrange it between the formwork panels P, P, and to arrange the sleeve pipe accurately at the predetermined position where the through hole is to be formed. This greatly improves workability.

(Effects of the Invention) The sleeve tube of the present invention is a sleeve tube for forming a through hole in a conch notebook wall to be cast and modeled, and the sleeve tube has an outer tube and is retractable into and out of the outer tube. A band plate made of stainless steel or the like is arranged along the longitudinal direction on the outside of the inner tube with its tip fixed, and the band plate is inserted between the ends. When the outer tube is inserted into the inner tube, the dimensions of the sleeve tube are determined by appropriately bending the free end of the strip toward the outer circumference of the outer tube. The insertion dimensions of the inner and outer tubes can be determined simply by bending the free ends of the tube appropriately, and the dimensions of the sleeve tube can be easily changed in accordance with the thickness of the concrete wall to be modeled. Further, the arrangement work between the formwork panels can be carried out extremely easily and accurately.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is an exploded perspective view of a sleeve tube, and FIG. 2 is a side view of the sleeve tube shown in FIG. 1 disposed between formwork panels. 1...Sleeve tube 3...Inner tube 5...Needle member 2...Outer tube 4...Strip plate P...Formwork panel

Claims (1)

[Claims] A sleeve pipe for forming a through hole in a concrete wall to be cast and shaped, the sleeve pipe comprising an outer pipe and an inner pipe fitted into the outer pipe so as to be retractable,
A band plate made of stainless steel or the like is disposed along the longitudinal direction on the outside of the inner tube with its tip fixed, and the outer tube is inserted into the inner tube so as to clamp the band plate. 1. A sleeve tube characterized in that the dimensions of the sleeve tube are determined by appropriately bending the free end side of the strip toward the outer circumferential side of the outer tube.