JP2999735B2 - Connection tube and sheath - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a connecting pipe and Sea scan
It relates to.

[0002]

2. Description of the Related Art Conventionally, joining of precast members, for example, a precast reinforced concrete beam 22 (hereinafter referred to as a precast beam) and a precast reinforced concrete beam 23
(Hereinafter, referred to as a precast column), a sheath 2 of the precast beam 22 and the precast column 23.
In order to prevent joint mortar 25 from entering from the joint of 4,
The joint width has been widened to a width that can be easily reached, and the sheath 24 has been joined by hand, or a sponge rubber 26 cut into a circle has been attached to the distal end of the sheath.

[0003]

However, if the joint width is increased to a width which can be easily accessed as in the prior art, the amount of joint mortar becomes enormous, which is uneconomical, and the cut-out portion becomes large, so that post-operation work becomes difficult. And the process was delayed. In addition, the sponge rubber in a slice has a problem in that the affixed portion is coated with water and peeled off, and the sponge portion has a cross-sectional defect, and thus lacks certainty.

[0004] The present invention has been made in view of the above problems, and an object of the present invention is to join a sheath so that joint mortar does not enter from a joint portion in joining a precast beam and a precast column. That is.

[0005]

According to the connecting pipe of the present invention for solving the above problems, one of the cylindrical bodies forms an insertion portion,
A housing portion is provided on the other side of the cylindrical body, and a telescopic tube that can expand and contract is housed in the housing portion, and a holding pin for suppressing extension of the telescopic tube is provided at a front portion of the housing portion. In addition, the sheath has a connecting pipe provided at an end of the sheath body , the connecting pipe includes an insertion section and a housing section, and an elastic telescopic cylinder is housed in the housing section. providing the presser pins to suppress growth out you characterized.

When the presser pin is pulled out, the telescopic cylinder extends from the housing. In addition, the extended telescopic cylinder is shrunk and the extension is suppressed with the presser pin.

[0007] When the holding pin of the connecting tube in the sheath is pulled out, the telescopic tube extends from the accommodating portion. By embedding this sheath in a precast member such as a precast beam or a precast column, a precast member that can easily and reliably join the sheath can be provided.

[0008]

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a reinforced concrete pipe will be described below in detail with reference to the drawings. FIG. 1 is a cross-sectional view of a connecting pipe of the present invention, FIG. 2 is a cross-sectional view of a connecting pipe in which a telescopic tube is extended, FIG. 3 (1) is a front view of the connecting pipe, and FIGS. FIG. 4 is a side view of the pipe, and FIG. 4 is a perspective view of the connecting pipe.

The connection pipe 1 is a cylindrical body formed of a synthetic resin material, and includes a rear insertion portion 2 and a front accommodation portion 3. The insertion part 2 serves to attach the connecting tube 1 to the sheath 4. The accommodation section 3 is formed to have a larger diameter than the insertion section 2 and accommodates a telescopic cylinder 5 which is extendable and retractable inside.
A flange piece 6 is formed at the front end of the housing portion 3, and a screw mounting protrusion 7 is formed integrally therewith.

The telescopic cylinder 5 comprises a fixed portion 8 closely contacting the inner surface of the housing portion 3 and a bellows-like extending portion 9 having spring properties. The expanding portion 9 is housed in the housing portion 3 in a contracted state. And
The extension to the outside is suppressed by the holding pin 10. Therefore, as shown in FIG. 2, when the holding pin 10 is pulled out, the extension portion 9 extends from the housing portion 3. The telescopic cylinder 5 may be extended by a spring (not shown) provided between the telescopic cylinder 5 and the accommodating section 3. In this case, the bellows-like extending section 9 is not provided.

FIG. 5 shows the connection tube 1 inserted into the distal end of the sheath 4, and the surface of the insertion portion 2 is coated with an adhesive. The telescopic tube 5 is provided with the extension 9 as described above.
Is stored in the storage portion 3 and the extension is suppressed by the holding pin 10. Therefore, when the holding pin 10 is pulled out, the extension portion 9 extends from the housing portion 3.

FIG. 6 shows a precast member 11 such as a precast beam or a precast pillar in which the above-mentioned sheath 4 is embedded. The flange piece 6 is fixed to a joint end face by a screw 12.
A pull-out space 13 for pulling out the holding pin 10 is formed in the joint end face.

Next, a method of joining the precast member 11 will be described by taking the joining of the precast beam 14 and the precast column 15 as an example. The precast beam 14 has a connecting projection 17 protruding from the jaw 16 of the precast column 15, and the sheath 4 into which a tendon 18 such as a PC steel wire is inserted is embedded vertically. The connecting tube 1 is inserted into the distal end of the sheath 4, and the telescopic tube 5 is accommodated in the contracted state. In addition, the precast beam 15 has
A jaw 16 on which the jaws 4 are placed is protruded, and the sheath 4 is embedded in the jaw 16 and an upper portion thereof, and a cushion rubber 19 is adhered around these distal ends.

The precast beam 14 as described above is placed on the jaw 16 of the precast column 15 to position the sheath 4 [(1) in FIG. 7 ]. At this time, the telescopic tube 5 of the connecting pipe 1
Is held down by the holding pin 10 in the housing portion 3. next,
Sheath 4 of precast beam 14 and precast column 15
Is inserted, and the holding pin 10 is pulled out using an appropriate jig. As a result, the telescopic tube 5 is extended and pressed against the cushion rubber 19 of the precast column 15, whereby the sheaths 4 are brought into close contact with each other ((2) in FIG. 7 ). Next, the joint portion 20 is filled with the joint mortar 21, but the joint mortar 21 does not enter the sheath 4 because the telescopic cylinder 5 is in close contact with the cushion rubber 19. After the joint mortar 21 has hardened, the tendon 18
To complete the joining [(3) in FIG. 7 ].

[0016]

According to the present invention, the structure of the joining pipe for joining the sheath of the precast member is simplified, so that it can be easily manufactured.

It is possible to provide a sheath that can be easily and reliably joined by a simple operation of pulling out the holding pin.

In joining precast members such as precast beams and precast columns, the expansion / contraction tube extending from one sheath is connected to the other sheath, so that these sheaths can be easily and reliably joined.

The joint material can be prevented from entering from the joint portion of the sheath, and the joint width can be set to an appropriate width.

Since the sheath of the precast member can be easily and reliably joined, the joining operation can be performed in a short time.

[Brief description of the drawings]

FIG. 1 is a sectional view of a connecting pipe.

FIG. 2 is a cross-sectional view of a connecting pipe in which a telescopic cylinder is extended.

FIG. 3 (1) is a front view of a connecting pipe, (2) and (3).
Is a side view of the same.

FIG. 4 is a perspective view of a connection pipe.

FIG. 5 is a cross-sectional view of a sheath provided with a connection tube.

FIG. 6 is a sectional view of a precast member in which a sheath provided with a connection pipe is embedded.

FIG. 7 (1) to (3) are precast beams and precast beams
It is sectional drawing which shows the joining method of a pillar.

FIG. 8 (1) and (2) show precast beams and pre-cast beams.
It is sectional drawing which joined the just pillar.

FIG. 9 is a cross-sectional view of a conventional joint between a precast beam and a precast column.

[Explanation of symbols]

1 connecting tube 2 insertion portion 3 housing portions 4,24 the sheath 5 telescopic tube 6 flange piece 7 bis Shin mounting projection piece 8 fixed portion 9 Zhang portion 10 pressing the pin 11 PC members 14 and 22 precast beams 15, 23 precast pillar 18 strain Material 19 Cushion rubber

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) E04C 5/00-5/20 F16L 5/00-5/02 E04B 1/22

Claims (6)

(57) [Claims] 1. One of the cylinders forms an insertion portion, the other of the cylinders has a storage portion, and a telescopic tube that can be extended and retracted is stored in the storage portion. A connecting pipe characterized by having a presser pin for holding out. Wherein said extension sleeve is accordion-like Shin having a spring property
The connecting pipe according to claim 1, comprising a tension part and a fixing part . 3. The connecting pipe according to claim 1, wherein a spring is provided between a rear end of the telescopic cylinder and a bottom of the housing . 4. A connecting pipe is provided at an end of the sheath body , the connecting pipe includes an insertion portion and a housing portion, and a telescopic tube that can be extended and retracted is housed in the housing portion. A sheath provided with a holding pin for suppressing extension of the cylinder. 5. The telescopic cylinder has a bellows- like extension having a spring property.
The sheath according to claim 4, comprising a tension portion and a fixing portion . 6. The sheath according to claim 4, wherein a spring is provided between a rear end of the telescopic cylinder and a bottom of the housing .