JPH0796877B2 - Segment and erector segment retention mechanism - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention is installed in a tunnel lining segment and a tunnel excavator, such as a shield machine, for assembling the segment along the wall of the tunnel. The present invention relates to a segment holding mechanism of an erector.

(Prior Art) Conventionally, a segment has a segment main body and a pair of eyebolt-shaped suspended members screwed from an inner peripheral surface side of the main body to a female screw member forming a part of a graft injection hole provided in the main body. And a pair of brackets having holes that can be aligned with the holes of the suspended member, and a pin that is passed through the suspended member and the bracket that are aligned with each other. And a holding mechanism having.

(Problems to be Solved by the Invention) The attachment of the erector of the segment is performed by lowering the holding mechanism of the erector toward the segment disposed below the erector, and the holes of the pair of suspended members of the segment. This is done by aligning the holes of the bracket of the holding mechanism with each other and then inserting the pins through them.

By the way, until the hole of the suspended member of the segment and the hole of the bracket of the holding mechanism are aligned, it can be done by mechanically operating the holding mechanism of the erector. However, manual insertion is required for the subsequent pin insertion work, which has been an obstacle to improving the work efficiency of segment assembly.

An object of the present invention is to improve the efficiency of segment assembly work using an erector.

(Means for Solving the Problems) The present invention according to claim 1 relates to a segment, including a segment main body, and a plurality of suspended members arranged and fixed to the main body at intervals. Each of the suspended members includes a shaft portion protruding from the inner peripheral surface of the main body, and a flange portion that is spaced from the main body and is continuous with the shaft portion.

According to a second aspect of the invention, the shaft portion of the suspended member is
It is characterized by being constituted by a pipe member having one end portion provided with an inner screw, the other end opened at the outer peripheral surface of the segment body, and the end portion.

The invention according to claim 3 relates to a segment holding mechanism of an erector used for assembling the segment according to claim 1, comprising a support member and a pair of locking members supported by the support member and movable in a straight line. And a pair of locking members that can be inserted between the segment body and the flange portion of the suspended member and that can be retained by the shaft portion and the flange portion of the suspended member, And a driving means for the locking member.

According to a fourth aspect of the invention, there is provided a guide rod which is supported by the supporting member and which penetrates each locking member and extends in parallel with the straight line.

(Operation and Effect) According to the invention described in claim 1, the segment is inserted between the flange portion and the segment main body, and is held via the locking means capable of being locked to the flange portion. You can From this, it is possible to eliminate the pin insertion operation and the operator who performs the operation, which were required for attaching the segment to the conventional erector holding mechanism, thereby improving the work efficiency of segment assembly. Can be achieved.

According to the invention of claim 2, the shaft portion of the suspended member can be used as a grout injection hole that penetrates the segment main body in the thickness direction thereof.

According to the invention described in claim 3, the holding mechanism of the erector is lowered between the suspended members of the segment disposed therebelow, and the pair of locking members are linearly moved to suspend them. After engaging with the shaft of the holding member,
When raising the holding mechanism, the locking member is locked to the flange portion of the suspended member, and the segment is suspended or retained. By this series of mechanical operations, the operation of attaching the segment to the holding mechanism of the erector can be performed in a short time, and as a result, the efficiency of segment assembly work is enhanced. Further, the mechanical operation of the attachment work of the segment can avoid the occurrence of a personal injury when human intervention is involved.

According to the invention described in claim 4, the locking member can be smoothly moved along the guide rod.

(Embodiment) The features of the present invention will be further clarified by the following description of the illustrated embodiment.

As shown in FIGS. 1 and 2, in order to apply a lining 12 to a tunnel excavated by using the shield machine 10, the rear end portion of the shield machine 10, more specifically, the shield machine 10
An erector 18, which is a device for assembling the segment 16 according to the present invention, is arranged close to a plurality of jacks 14 which are arranged at intervals in the circumferential direction in the shield main body 13 for the purpose of propulsion.

The erector 18 is rotatably supported around the axis of the shield body 13 via a plurality of rollers 20 that are arranged at intervals in the shield body 13 in the circumferential direction and are rotatably supported by the shield body 13. Erector ring 22 is provided. A pair of arms 24 extending rearward from the shield body 13 are attached to the erector ring 22, and a gate-shaped member 26 is attached to the arms so as to be vertically movable in the drawing. A segment holding mechanism 30, which is the object of the present invention, is attached to the central portion of the gate-shaped member 26 via a slide device 28.

The ring 22 is provided with teeth, and is rotationally driven by a gear 32 that engages with the teeth and that is driven by a motor (not shown) supported by the shield body 13. By this rotational drive, the holding mechanism 30 is moved around the axis of the shield body 13 to a predetermined rotation angle. Further, the holding mechanism 30 is moved in the radial direction of the shield body 13 by the movement of the gate-shaped member 26 by the expansion and contraction operation of the pair of jacks 34 connected to both the arm 24 and the gate-shaped member 26. Furthermore, the slide device 28
By this operation, the holding mechanism 30 is moved substantially parallel to the axis of the shield body 13, that is, the cylinder.

As shown in FIGS. 3 and 4, the segment 16 according to the present invention includes a segment main body 36 made of concrete and a plurality of (a pair in the example shown in the figure) partially suspended in the main body for suspending. And a member 38.

The suspended members 38 are arranged at a central position in the circumferential direction of the segment main body 36 with a space in the axial direction thereof. Each of the suspended members 38 includes a shaft portion 40 extending in the segment body in the radial direction and a flange portion 42 connected to the shaft portion.

The illustrated shaft portion 40 has a length dimension slightly larger than the thickness dimension of the segment body 36, and one end portion 40a thereof projects from the inner peripheral surface 36a of the segment body 36 and the other end portion 40b thereof forms an outer peripheral surface of the segment body. It is exposed at 36b and defines a part of the outer peripheral surface. It is also possible to use a suspended member having a length dimension such that the other end portion 40b does not reach the outer peripheral surface 36b of the segment body.

The flange portion 42 is formed of an annular plate that surrounds the one end portion 40a of the shaft portion and is orthogonal to the one end portion 40a.
Spaced from a. Inner surface 36a of segment body
In order to reduce the amount of protrusion of the shaft portion 40 from and to secure an appropriate distance between the flange portion 42 and the inner peripheral surface 36a of the segment body, in the illustrated example, the shaft portion 40 extends, the inner peripheral surface 36a. A recess 48 is formed which has an open and a flat bottom surface. Needless to say, whether or not to provide such a recess is arbitrary.

As shown in FIG. 5, the shaft portion 40 can be formed of a tube. When the shaft portion 40 is formed of a tube, the tube can be used as an injection hole for a backing material such as a graft. Preferably, a thread groove or inner thread 44 is provided on the inner peripheral surface of one end of the tube. The shaft portion 40 is a suitable anchor muscle, for example, the shaft portion.
It is desirable to embed 40 in segment body 36 with a pair of doglegged anchor bars 46 that partially surround it.

As shown in FIG. 6, the shaft 40 of the member to be hung is connected to the diameter-reducing pipe 50a whose diameter gradually decreases from the outer peripheral surface to the inner peripheral surface of the segment main body and the large-diameter end portion thereof. It can be configured with 50b.

The flange portion 42 can have a circular outer shape as well as a polygonal outer shape such as an ellipse or a rectangle. Both the shaft portion 40 and the flange portion 42 can be formed of steel, iron, reinforced plastic, or the like. Further, the segment body may be made of steel in addition to the illustrated example in which the segment body is made of concrete. In the case of a steel segment main body, the suspended member can be fixed to the segment main body by welding the shaft portion of the suspended member to the reinforcing rib of the segment main body.

The suspended member may be a member having a hollow shaft such as the above-mentioned pipe, or a member having a solid shaft, such as a bolt. The plurality of suspended members can be arranged at intervals in the circumferential direction, preferably in the central portion in the axial direction. Further, the member to be suspended is
The shaft portion and the flange portion may be welded to each other or integrally formed.

The segment 16 is held by a holding mechanism 30 and is placed at a predetermined position by moving the holding mechanism.

7 to 10 show an example of the holding mechanism 30. The holding mechanism 30 has a frame 52 having a channel-shaped cross section, which is an example of a support member.

The frame 52 is a pipe member 5 that forms a double pipe slidable with respect to each other.
It is attached to the slide device 28 via 4,56 and a hydraulic jack 58 which is arranged in both pipe members 54,56 and connects these pipe members to each other. More specifically, an inner pipe member 54 having a rectangular cross-sectional shape is fixed to the central portion in the longitudinal direction of the top portion 52b facing the open end portion 52a of the frame 52, and the rectangular cross-sectional shape is changed. Outer pipe member having
56 is fixed to the slide device 28. Hydraulic jack 58
The joints 64 and 66 attached to both ends of the
Through, and is pivotally attached to brackets 70, 72 fixed to the ends of the pipe members 54, 56. By operating the hydraulic jack 58, the frame 52 moves in the axial direction together with the inner pipe member 54.

Inside the frame 52, a pair of locking members 74 are arranged.

Referring to FIG. 8, each locking member 74 has an inverted convex cross-sectional shape as a whole. Each locking member 74 has a rectangular parallelepiped space 76 that is open on one of the top surface 74a and a pair of side surfaces 74b perpendicular to the cross section, and a half that is continuous with the space and that is open at the bottom surface 74c and one side surface 74b. Cylindrical hole 78 and space 76
And a hole 80 that is open to the center of the other side surface 74b. The hole 78 has substantially the same diameter as the shaft portion 40 of the suspended member of the segment 16.

The pair of locking members 74 has, in the frame 52, one side surface 74b in which a part of the space 76 and a part of the hole 78 are opened.
Are arranged so as to face both ends in the longitudinal direction. In the frame 52, the pair of stepped portions 74d of each locking member 74 are in contact with the pair of flange portions defining the open end 52a of the frame 52, whereby each locking member 74 is supported by the frame 52. . In addition, the top surface 74a of each locking member 74 and the side surface 7
The pair of other side surfaces 74e adjacent to 4b abut against the frame top portion 52b and the opposite side portion 52c, respectively, whereby each locking member can move in a straight line in the longitudinal direction of the frame 52. is there.

The protruding portion 8 of each locking member 74 passes through between the open ends 52a of the frame.
2 is stretched. Further, the bottom surface of each locking member 74, that is, the bottom surface 74c of the protruding portion 82, and the bottom surface 74c that defines the space 76 are defined.
The thickness between the surface 76a parallel to the
Is somewhat smaller than the distance between the inner peripheral surface of the and the flange portion 42 of the member to be suspended 38. Therefore, the portion between the both surfaces 74c and 76a, that is, the locking portion can be inserted between the inner peripheral surface of the segment 16 and the flange portion 42 of the suspended member 38.

Each locking member 74 can be moved by operating the hydraulic jack 84 as a driving means. Each hydraulic jack 84 has a cylinder and a piston rod, a part of the cylinder 84a is received in the hole 80 of the locking member 74, and the cylinder 84a is connected to the locking member 74 in the space 76. There is. The piston rod 84b of the hydraulic jack is pivotally attached to the longitudinal end of the frame 52 via a shaft 86.

The holding mechanism 30 is a locking member for suspending the segment 16.
The protrusion 82 of 74 is lowered onto the segment 16 so as to be located between the pair of suspended members 38. The hydraulic jack 84
It is placed in an expanded state (shown by an imaginary line in FIG. 7) in advance.
Next, the hydraulic jack 84 is contracted. This allows
The peripheral portion (locking portion) of the hole 78 of each locking member 74 is a member to be suspended.
The shaft 40 of 38 is locked. Next, while maintaining the contracted state of the hydraulic jack 84, the other parts of the erector 18 are operated to move the segment 16 held by the holding mechanism 30 to a predetermined position. During this time, the locking portion of each locking member 74 is locked to the flange portion 42 of the suspended member 38. Thereby, the segment 16 can be held so that the relative displacement between the segment 16 and the holding mechanism 30 hardly occurs.

The operations up to this point can all be performed mechanically without the intervention of a worker. This allows the work of attaching the segment 16 to the holding mechanism 30 to proceed efficiently and safely.

By the way, the pullback speeds of the cylinders of the pair of hydraulic jacks 84 are not always uniform. So the frame
The center in the longitudinal direction of 52 does not coincide with the center between the members to be suspended 38, and the segment 16 due to the operation of the subsequent erector
There is a possibility that an error will occur in the arrangement position of. However, in order to correct the error, it is sufficient to measure the pullback amount of the cylinder of each jack 84, such as the discharge amount of the pressure liquid.

In this example, the bottom surface 74c of each locking member 74 contacts the inner peripheral surface of the segment 16. Therefore, a frictional force is generated between them. In order to avoid the generation of this frictional force, as in the example shown in FIGS. 11 to 14, at the time of attaching the segment 16, each locking member 74 is brought close to the segment 16 and positioned immediately above it, and in advance, The thickness of the locking portion may be set small, or the distance between the flange portion 42 of the suspended special member 38 and the segment body may be set large.

In the example shown in FIGS. 11 to 14, each locking member 74 is further supported by the frame 52 via a pair of guide rods 86 in order to facilitate the movement of each locking member 74.

Due to the arrangement of the guide rods 86, the frame 52 is provided with a pair of brackets 88 at intervals in the vicinity of the central portion in the longitudinal direction thereof. Each pair of guide rods 86
Are supported by the pair of brackets 88 and the respective longitudinal ends 90 of the frame 52 and extend in the longitudinal direction of the frame 52. Further, as shown in FIG. 12, each locking member 74 is formed with a through hole 92 for passing a pair of guide rods 86. First
As shown in FIG. 13, it is preferable to dispose a bearing 94 in the through hole 92. Thereby, the relative movement between each locking member 74 and each pair of guide rods 86 can be made smoother.

In this example, unlike the space 76 shown in FIG. 8, the space 96 corresponding to the space 76 is not open to the top surface 74a of the locking member 74.

As shown in FIGS. 15 to 17, a motor 98 can be used as a drive source for each locking member 74. The motor 98 is supported by the cover of the coupling 100 connected to it. In the longitudinal end portions 90 of the frame 52 and the bracket 102 provided at the longitudinal center portion of the frame,
A screw rod 104 that extends in the longitudinal direction of the frame 52 through the central portions thereof is rotatably supported. One end of the screw rod 104 is connected to the coupling 100, and the rotational force of the motor 98 is transmitted to the screw rod 104 via the coupling 100 and rotated.

In this example, a screw member 106 having a shaft portion and a head portion and a thread groove penetrating the shaft portion and the head portion is fitted in the hole 80 of each locking member 74 at the shaft portion, and a bolt (Fig. It is fixed to the locking member 74 by not shown). The thread groove of each screw member 106 and the thread of the screw rod 104 penetrating each screw member are engaged with each other, and when the screw rod 104 is rotated in one direction, each screw member 106 and each locking member are engaged. 74 move toward each other, and when the screw rod 104 is rotated in the other direction, the locking members 74 move together with the screw members 106 in a direction increasing the mutual distance. By this movement, each locking member 74 and the suspended member 38 are locked and released. Motor 98, coupling
The 100, the screw rod 104, and the screw member 106 constitute driving means for each locking member.

Note that the other components are the same as those in the example shown in FIGS. 12 to 14, and the same reference numerals are given to the drawings to avoid duplication of description.

In each of the above-described examples, the pair of locking members 74 are located between the pair of members 38 to be suspended, and these members 38 are to be suspended.
However, instead of this, the pair of locking members may be positioned so as to sandwich the pair of suspended members between them, and then moved toward the suspended members. Good. However, in this case, a frame having a large length dimension is prepared, or the distance between the suspended members is set to be small.

[Brief description of drawings]

1 and 2 are schematic partial longitudinal sectional views and front views of the erector, FIG. 3 is a plan view of the inner peripheral surface side of the segment according to the present invention, and FIG. 4 is a line 4-- of FIG. 4 is a longitudinal sectional view taken along line 4, FIG. 5 is a partially enlarged sectional view of a segment, FIG.
FIG. 7 is a vertical sectional view of a suspended member of another example, FIG. 7 is a vertical sectional view of a holding mechanism according to the present invention, FIG. 8 is a perspective view of a locking member, and FIGS. 9 and 10 are Longitudinal sectional views taken along lines 9-9 and 10-10 of FIG. 7, respectively, FIG. 11, FIG. 12,
13 and 14 are a longitudinal sectional view of a holding mechanism of another example, a perspective view of a locking member, a longitudinal sectional view taken along line 13-13 and line 14-14 in FIG. 11, and FIG. FIG. 16, FIG. 16 and FIG. 17 are longitudinal sectional views of a holding mechanism of still another example, which are longitudinal sectional views taken along line 16-16 and line 17-17 in FIG. 16: segment, 18: erector, 30: segment holding mechanism, 36: segment body 38: suspended member, 40, 42: shaft and flange of suspended member, 52: frame (support member), 74: Locking member, 84: Hydraulic jack (driving means), 86: Guide rod, 98, 100, 104, 106: Motor, coupling, screw rod and screw member (driving means).

Front page continuation (72) Inventor Hata Koshiaki 1-1-1 Wadazaki-cho, Hyogo-ku, Kobe-shi, Hyogo Mitsubishi Heavy Industries Ltd. Kobe Shipyard (72) Yoshimitsu Kumao Wadasaki-cho, Hyogo-ku, Kobe-shi, Hyogo 1-1-1 Mitsubishi Heavy Industries, Ltd. Kobe Shipyard (56) Bibliography Sho 56-150300 (JP, U) Rib 58-149499 (JP, U) Rib 59-31699 (JP, U) ) Actually open 64-19699 (JP, U)

Claims (4)

[Claims] 1. A segment main body, and a plurality of suspended members which are arranged and fixed to the main body at intervals from each other, each suspended member being from an inner peripheral surface of the segment main body. A protruding shaft portion, and a flange portion that is continuous with the shaft portion and has a space between the shaft portion and the segment body,
segment. 2. A shaft according to claim 1, wherein the shaft portion is made of a pipe, one end of which is provided with an internal thread, and the other end of which is open at an outer peripheral surface of the segment body. segment. 3. A segment holding function of an erector used for assembling the segment according to claim 1, comprising a support member and a pair of locking members supported by the support member and movable along a straight line. A pair of locking members that can be inserted between the segment body and the flange portion of the suspended member, and that can be locked to the shaft portion of the suspended member and the flange portion thereof; Drive means for the locking member,
Erector segment holding mechanism. 4. The segment holding mechanism for an erector according to claim 3, further comprising a guide rod which is supported by the support member and which extends through the respective locking members in parallel with the straight line.