JP2000274189A - Joint member for shield segment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint member for shield segments that can be joined at a touch correspond to the demand of a prompt execution of shield construction, and is tough in strength, and also can reduce costs. SOLUTION: The joint member is to join shield segments by inserting the joint male of a following segment in the joint female segment of a preceding segment, in which the joint male part 1 comprises a rod having a sleeve 11a formed at the distal end and a corn-shaped pin to be inserted in the sleeve 11a by its base part, and the joint female part 2 comprises a rod 21 having an opening into which the joint male part is inserted in its distal end part, a tongue and groove adjusting ring 22 being inserted into the opening of the rod and joined at a step-configured part formed near the inlet of the opening, an a ring-shaped upper lid 23 being inserted in the inlet of the opening and joining the tongue and groove adjusting ring 22 at the opposite side of the step-configured part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield segment coupling device for continuously connecting shield segments used for lining a drilled hole excavated by a shield excavator.

[0002]

2. Description of the Related Art Conventionally, as a type of continuously connecting (adding) shield segments, a type using bolts such as a through bolt type and a simple bolt type has been widely used.

[0003] However, the bolt type requires two steps of a bolt passing step and a nut tightening step, and in recent years there is a face that it is not possible to cope with a demand for rapid construction of shield work.

Accordingly, the present applicant has provided a male joint portion on the succeeding segment and a female joint portion on the preceding segment.
A joint device for connecting a shield segment by inserting a male joint portion of a subsequent segment into a female joint portion of a preceding segment has been proposed (Japanese Patent No. 2582213).

FIG. 8 shows the joint device, and FIG.
The connection segment 1 is connected to the leading segment 2 by the joint device.

[0006] The connecting segment 1 is provided with a joint male part generally denoted by 101. The joint male part 101 has a sleeve 103 supported by an anchor bar 102 and a base part inserted into the distal end of the sleeve 103. Cone shaped pin 10
It consists of four.

The preceding segment 1 has a total of 20
1 is provided, and a female joint part 201 is provided.
The large-diameter sleeve 20 has an opening on the front side into which the male joint part 101 is inserted, and a lower lid 202 fitted on the back side.
3, a misalignment adjustment ring 204 which is inserted into the large-diameter sleeve 203 with the lower lid 202 removed and one surface of which is locked at the step of the large-diameter sleeve 203; Locking ring 2 for locking the other surface of adjustment ring 204
05.

When the male joint portion 101 of the connecting segment 1 is press-fitted into the female joint portion 201 of the preceding segment 2, the sleeve 103 of the male joint portion 101 is expanded in diameter by the cone-shaped pin 104 and abuts against the misalignment adjusting ring 204. And fitting male part 10
1 and the joint female part 201 are connected, and the leading segment 1 and the connection segment 2 are connected.

[0009] The misalignment adjustment ring 204 is
Can move within the clearance L (FIG. 6) within the large-diameter sleeve 203, and even if the ring joint is misaligned between the leading segment 1 and the connecting segment 2, the cone-shaped pin 104 can be moved. When inserted, misalignment adjustment ring 2
04 and the cone-shaped pin 104 automatically become concentric,
Some misalignment is absorbed and combined without any trouble.

[0010]

According to the above-mentioned joint device for a shield segment, the segments are joined simply by inserting the joint male portion of the connection segment into the joint female portion of the preceding segment, and the connection of the segments can be made with one touch. It is possible to meet the demand for rapid construction of shield work, but there is still room for improvement in the following points.

The female joint portion has an opening formed on the front surface side into which the male joint portion is inserted, and a large-diameter sleeve into which the lower lid is fitted on the rear surface side, and a step formed by removing the lower lid and being inserted into the large-diameter sleeve. And a locking ring that is inserted into the large-diameter sleeve and locks the other surface of the ring, the number of parts being reduced. Many,
Further, the locking ring must be firmly inserted into the large-diameter sleeve so as to stop the movement of the misalignment adjusting ring, and the sleeve-shaped one is weak in strength.

The male joint comprises a sleeve supported by anchor bars and a cone-shaped pin into which a base is inserted at the tip of the sleeve.
Although made of a member, a relatively long sleeve is used, and the sleeve is weak in strength.

[0013] The present invention reduces the number of parts of the joint female part,
Another object of the present invention is to provide a joint device for a shield segment that can use a high-strength rod member instead of a sleeve for a male joint portion and a female joint portion.

[0014]

According to the present invention, in a joint device for connecting a shield segment by inserting a male joint portion of a succeeding segment into a female joint portion of a preceding segment, the male joint portion is connected to the distal end portion. The joint female part comprises a rod having a sleeve formed therein and a cone-shaped pin into which the base is inserted into the sleeve of the rod. A misalignment adjustment ring that is inserted into the opening and is locked at a step formed near the entrance of the opening, and a ring-shaped that is inserted at the entrance of the opening and locks the misalignment adjustment ring on the side opposite to the step. A joint device for a shield segment consisting of an upper lid.

When the male joint part is press-fitted into the female joint part, the cone-shaped pin of the male joint part reaches the bottom of the opening of the female joint part,
Upon further press-fitting, the diameter of the sleeve of the male joint is expanded by the cone-shaped pin, the male joint and the female joint are joined, and the leading segment and the connecting segment are connected with one touch.

The misalignment adjustment ring is inserted into the opening of the joint female portion from the front side, and one surface thereof is locked by the step portion. The other side of the misalignment adjustment ring is locked by being inserted from the other side. The joint male part and the joint female part are made of a rod member,
It becomes strong in strength.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The left views of FIGS. 1, 2 and 6 show a male joint 1 provided in a succeeding segment, and the male male joint 1 has a rod 11 having a sleeve 11a formed at the tip.
And a cone-shaped pin 12 into which the base 12a is inserted into the sleeve 11a of the rod 11.

FIGS. 3, 4, 5 and 6 show the female joints 2 provided in the preceding segment, and the male joints 1 are inserted into the distal ends of the female joints 2. Opening 2
1a, and an opening 21 of the rod 21
a adjustment ring 22 inserted into the opening 2a and locked by a step 21b formed near the entrance of the opening 21a;
1a is inserted into the entrance of the stapling adjustment ring 22
b and a ring-shaped upper lid 23 locked on the opposite side.

FIG. 6 shows a state in which the male joint part 1 and the female joint part 2 are assembled. The male part 1 of the joint is formed by inserting the base 12a of the cone-shaped pin 12 into the sleeve 11a of the rod 11. In addition, the misalignment adjustment ring 22 is inserted into the opening 21a of the lot 21 and is locked by the stepped portion.
A ring-shaped upper lid 23 is inserted into an entrance of the joint, and the misalignment adjustment ring 22 is locked to form the joint female portion 2.

FIG. 7 shows a state in which the male joint part 1 is press-fitted into the female joint part 2 to connect the leading segment and the connecting segment. The cone-shaped pin 12 of the male joint part 1 is connected to the female joint part. 2 reaches the bottom of the opening 21a, and when further press-fitting, the sleeve 11a of the male joint 1 is expanded in diameter by the cone-shaped pin 12, so that the male joint 1 and the female joint 2 are joined together and connected to the preceding segment. The segments are connected.

Although the joint of the rod 21 is fixed to the concrete in the illustrated embodiment, the rod 21 may have a small diameter and an anchor plate may be provided at the tip.

[0022]

When the male part of the joint is pressed into the female part of the joint, the cone-shaped pin of the male part of the joint reaches the bottom of the opening of the female part of the joint. When the diameter is enlarged, the male joint part and the female joint part are joined, the leading segment and the connecting segment are connected with one touch, and it is possible to meet the demand for rapid construction of shield work.

The misalignment adjustment ring is inserted into the opening of the female joint portion from the front side, one surface thereof is locked by the step portion, and the ring-shaped upper lid is screwed into the opening portion of the female joint portion. Since the other surface of the misalignment adjustment ring is locked by inserting from above, the locking structure of the misalignment adjustment ring is simplified, and the cost of the joint female part can be reduced to three members. it can.

Conventionally, the ring has a wedge effect and an effect of performing misalignment adjustment, and the outer diameter of the female side metal fitting has been increased in order to include the wedge effect. However, in the present invention, the wedge effect has a tapered hole. However, since the misalignment adjustment is performed on the ring at the mouth, the outer diameter of the female side metal fitting is reduced, and it is possible to cope with a tunnel with a smaller diameter and a shield segment with a smaller girder height.

Conventionally, the ring is provided with a wedge effect and an effect of performing misalignment adjustment, and it is necessary to arrange an anchor rebar or an anchor plate in order to include the wedge effect and fix the metal so as not to be pulled out of the concrete. Met.

However, according to the present invention, the wedge effect is provided by the tapered hole, and the misalignment is adjusted by holding the ring at the mouth, so that the required diameter is small. As shown in FIG. Takes a predetermined length and can depend on the bond strength between concrete and steel. At this time, a commercially available deformed reinforcing bar can be used for the bar.

[Brief description of the drawings]

FIG. 1 is a side view of a rod of a male joint part having a sleeve at the tip end.

FIG. 2 is a side view of a cone-shaped pin of a male joint.

FIG. 3 is a side view of a rod of a female joint part having an opening formed therein.

FIG. 4 is a front view and a side view of a misalignment adjustment ring of a male joint part.

FIG. 5 is a front view and a side view of a ring-shaped upper lid of the male joint part.

FIG. 6 is a side view before the male joint part and the female joint part are joined.

FIG. 7 is a side view after the joint male part and the joint female part are joined.

FIG. 8 is a sectional view showing a conventional joint device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Male joint part 11 ... Rod 11a ... Tip sleeve of rod 12 ... Conical pin 12a ... Base part of cone pin 2 ... Female joint part 21 ... Rod 21a ···········································································

Claims (1)

[Claims] 1. A joint device for connecting a shield segment by inserting a joint male portion of a succeeding segment into a joint female portion of a preceding segment, wherein the male joint portion includes a rod having a sleeve formed at a distal end thereof; It consists of a cone-shaped pin into which the base is inserted into the sleeve, and the joint female part is
A rod having an opening at the distal end portion into which the male joint portion is inserted, a misalignment adjustment ring inserted into the opening of the rod and locked by a step formed near the entrance of the opening; And a ring-shaped upper lid which is inserted into an entrance of the buckle and locks the misalignment adjusting ring on the side opposite to the stepped portion.