JPH061678Y2 - Segment chucking device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] This invention is used when a shield machine is used to assemble a segment for waterproofing and reinforcement on the inner peripheral surface of an tunnel by an erector while excavating a tunnel for lining. And a chucking device for mechanically gripping the segment.

[Conventional technology]

In recent years, automation of the shield construction method is progressing due to the increase in the depth and diameter of tunnels. Among them, segment assembly is being automated by an automatic erector from the viewpoint of shortening the construction period.

As a conventional segment chucking device of this type, for example, an eye bolt for segment gripping (suspending) as described in JP-B-61-11356 and JP-A-60-58698 is manually segmented. Some are screwed onto and gripped.

However, this method requires manual work in a narrow tunnel, which takes time and hinders rapid segment assembly. Therefore, in order to improve this, Shokai 60-1
A segment chucking device as described in Japanese Patent No. 95400 or Japanese Utility Model Laid-Open No. 62-50300 has been proposed. According to this, as shown in FIG. 6, the suspension beam 32 is attached to the slewing wheel 31 which is rotatable along the inner peripheral wall of the shield frame 30.
Is provided, and the balancer 3 is pivotally attached to the center of the
A chucking device 35 for gripping the segment S is provided on the parts 3, 34.

The chucking device 35 includes an engaging hook 37 that projects radially outward from the balancer 34 and has a T-shaped hook portion formed at the tip of the grip shaft 36. In this configuration, when the segment ring is constructed in the tunnel space excavated by the shield machine, the engaging hook 37 is
The segment S is fitted into an engagement hole 38 formed in the center of the inner surface, and a gripping shaft 36 is rotated by 90 ° by a drive motor (not shown) to be engaged, and the segment S is gripped and conveyed to a predetermined position. , Attach to existing segment.

[Problems to be solved by the device]

However, since the engagement hook 37 is attached to the end of the grip shaft 36 and is formed so as to project from the balancer 34,
There is a drawback that the effective hollow diameter is reduced by the amount of protrusion. Further, when gripping the segment S, the entire suspension beam 32 including the chucking device 35 and the balancers 33, 34 is expanded and contracted in the radial direction so that the engagement hook 37 is engaged with the engagement hole 38 of the segment S.
Have to be fitted into the joint, which makes the engagement time-consuming and hinders the rapid assembly of the segment and its automation.

In addition, it is necessary to attach a special engagement metal piece to the engagement side to form an engagement hole 38 for engagement with the engagement hook 37 on the segment side.

In view of such conventional problems, the present invention has an object of facilitating automation of the device by making it possible to grip the segment by operating only the chucking device.

[Means for Solving the Problems]

To achieve the above object, a chucking device according to the present invention is a chucking device that is embedded in a segment mounting table and that grips a segment by screwing a chucking screw into a grout hole screw provided in the segment. A rotary shaft driven by means is provided, a spline is formed in the axial direction of the rotary shaft, the chucking screw is attached to the rotary shaft so as to be slidable along the spline, and the spline is screwed to the chucking screw. A supporting nut is provided, and a rotation stopping means is attached to the supporting nut.

[Action]

In the above structure, when the rotating shaft is rotated by the drive motor, the chucking screw rotates. At this time, if the support nut screwed into the chucking screw does not rotate, the chucking screw projects in the axial direction along the spline of the rotating shaft. Then, when the screw pitch of the grout hole screw of the segment is matched, it is screwed into this and chucking is performed.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

First, referring to FIG. 5, an outline of the erector 19 equipped with the chucking device 1 of the present invention will be described. An annular slewing wheel 23 is rotatably provided along the inner peripheral wall of the shield frame 22 for slewing. An arch-shaped suspension beam 24 is provided at the rear end of the wheel 23 along the circumferential direction of the shield frame 22 by a telescopic cylinder 27 via a pair of telescopic rods 25 and a support arm 26 so as to be movable in the radial direction. . A supporting member 28A is provided at the center of the suspension beam 24 so as to be guided by a sliding load 28 and axially movable by a sliding jack 29. A segment mounting table 21 pivotally supported at the center of the support member 28A is provided. Then, the recess formed in the segment mounting table 20
The chucking device 1 is embedded in 21. In addition, 18 shows a segment fastening device.

FIG. 1 is a sectional view of an essential part of a chucking device 1 according to the present invention.

The recess 21 of the segment mounting table 20 is provided with a pinion 3 which is rotated by a drive motor 2 which constitutes a drive means, and a gear 4 which is rotated by meshing with the pinion 3.
A spline 5a is formed in the axial direction of the rotary shaft 5 protruding from the center of the gear 4. A chucking screw 6 that engages with the spline 5a is fitted and mounted on the rotating shaft 5, and the chucking screw 6 is rotated by the rotation of the rotating shaft 5 while being slidable in the axial direction along the spline 5a. Has become. The chucking screw 6 is provided with a support nut 7 that is screwed into the chucking screw 6.

On the other hand, an outer wall 8 which is a fixed wall is provided so as to cover the recess 21. The outer wall 8 has a protruding portion 8A for fitting into a grout hole outer peripheral spigot portion 16 provided in the central portion of the segment S. This is for alignment with the segment. The side surface of the protruding portion 8A is formed in a tapered shape, and the side surface of the grout hole outer periphery inlay portion 16 of the other segment is also formed in a correspondingly tapered shape. As a result, the chucking screw 6 and the female screw (grout hole screw) 15a of the grout hole 15 provided following the outer peripheral inlay portion 16 of the segment S are easily screwed together.

A projecting opening 9 through which the chucking screw 6 appears and disappears is provided at the center of the outer wall 8. The diameter of the projecting port 9 is expanded slightly from the outer end, and the expanded nut 10 holds the support nut 7. An elastic body 13 such as a spring is provided between the support nut 7 and the pressing member 12 fixed to the outer wall 8 to form a rotation preventing means for the support nut 7. That is, the elastic force of the elastic body 13 pushes the support nut 7 against the bottom wall 11 of the expanded diameter portion 10 to impart a rotation preventing resistance force. Further, preferably, as shown in FIG. 3, the bottom wall 11 is formed with a detent groove 11a having an arc-shaped cross section.
An arcuate protrusion 7a formed on the end surface of the support nut 7 is engaged with the.

The outer wall 8 is fixed to the segment mounting table 20, and a bearing 14 is provided between the movable portion and the fixed portion.

On the other hand, the grout hole 15 of the segment S has a grout hole screw (female screw) for screwing with the chucking screw 6.
15a is cut.

Next, the operation of the chucking device 1 will be described with reference to FIGS. 2 (a) to (c).
A description will be given based on a cross-sectional view of the relevant part.

First, as shown in FIG. 2 (a), the outer wall protruding portion 8 A of the chucking device 1 is inserted into the grout hole outer periphery inlay portion 16 of the segment S by operating the erector 19. At the time of this insertion, the turning wheel 23, the telescopic cylinder 27, the sliding jack 29, etc. are operated to align the segment S with the chucking device 1.

In this case, since the projecting portion 8A and the spigot portion 16 on the segment side are formed in a tapered shape, it is easy to fit them together.

Before starting the chucking, the chucking screw 6 is not projected from the outer wall 8 but is housed in the recess 21.

Next, in FIG. 2 (b), after the protrusion 8A of the outer wall 8 is fitted, the drive motor 2 is operated to rotate the gear 4,
By rotating the chucking screw 6, chucking with the segment S is started. The chucking screw 6 rotates by being screwed into a support nut 7 having a rotation preventing function, so that the chucking screw 6 rotates while rotating the outer wall 8
It projects from the projecting port 9 of. Then, as shown in FIG. 2 (c), the chucking screw 6 is inserted into the grout hole screw 15a hole.
Is inserted, and when the screw pitches of both are matched, the chucking screw 6 is further inserted while being screwed into the grout hole screw 15a, and finally, as shown in FIG. The collar-shaped engaging portion 6a provided at the inner end of the nut 6 comes into contact with the end surface of the nut 7 supported thereby to stop the insertion.
At this time, the rotation of the drive motor 2 is also stopped. Thus, chucking screw 6 and grout hole screw 15
a is fully screwed and chucking is complete. After this,
The steady rest jack 17 (Fig. 5) is extended and pressed against the inner surface of the segment S to fix the segment S. In this state, the turning wheel 23 is rotated to convey the segment S to a predetermined position.

By the way, when the chucking screw 6 does not match the screw pitch of the chucking screw 6 into the grout hole screw 15a at the start of insertion, the chucking screw 6 slips on the surface A (see FIG. 2 (b)). When slipping, the support nut 7 tries to float. The support nut 7 floats up to a depth greater than the depth of the anti-rotation groove 12 provided in the bottom wall 11, and the anti-rotation force due to the elastic (pressing) force of the elastic body 13 such as a spring is
The support nut 7 rotates when it loses the screw rotation force (see FIG. 3). In this case, if the support nut 7 does not rotate, the elastic body 13 rises while compressing the elastic body 13, and the drive motor 2 stops rotating at the compression limit point of the elastic body 13. When the support nut 7 rotates, since the relative positional relationship does not change, the drive motor 3 continues to rotate until the chucking screw 6 is screwed into the grout hole screw 15a.

[Effect of device]

As described above, the present invention has the following effects. That is, since the chucking screw is stored in the segment mounting table before starting chucking and protrudes during chucking, the chucking device itself does not need to expand or contract in the radial direction, and the effective hollow diameter is increased. be able to.

When the chucking position is determined, the chucking device operates by itself, so that the auxiliary operation of the erector and the segment is not required, so that it becomes easy to automate the segment assembly process.

Further, since the most common screw part is gripped, no special work is required on the segment side.

[Brief description of drawings]

1 to 5 are drawings for explaining an embodiment of the present invention. FIG. 1 is a sectional view of a main part of a chucking device, and FIGS. 2 (a) to 2 (c). FIG. 4 is a cross-sectional view of an essential part showing the state of chucking with time. 3 (a) and 3 (b) are partial cross-sectional views of the rotation preventing portion of the support nut, FIG. 4 is a partial cross-sectional view of the end portion of the chucking, and FIG. 5 shows the entire erector equipped with the chucking device. It is a drawing. DESCRIPTION OF SYMBOLS 1 ... Chucking device, 2 ... Drive motor, 4 ... Gear, 5 ... Rotating shaft, 6 ... Chucking screw, 7 ... Support nut, 8 ... Outer wall, 13 ... Elastic body, 15 ... Grout hole, 15a ... Grout hole screw , 19 ... Electa, 20 segment mounting table, 21 ... Recess, S ... Segment.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Kubota 51, Fujimi 2-1026, Chiyoda-ku, Tokyo Maeda Construction Co., Ltd. (72) Creator Yoshino Osamu 3 Higashikawasaki-cho, Chuo-ku, Kobe, Hyogo Prefecture 1st-1 Kawasaki Heavy Industries, Ltd. Kobe factory (72) Inventor Kenichi Oride 3-1-1 Higashikawasakicho, Chuo-ku, Kobe-shi, Hyogo Prefecture 1st-1 Kawasaki Heavy Industries Ltd. Kobe factory (72) Takeshi Ikeda Hyogo 3-1, 1-1 Higashikawasaki-cho, Chuo-ku, Kobe City, Kawasaki Heavy Industries, Ltd. Kobe factory

Claims (1)

[Scope of utility model registration request] 1. A chucking device that is embedded in a segment mounting table and holds a segment by screwing a chucking screw into a grout hole screw provided in the segment, wherein a rotating shaft driven by a driving means is provided.
A spline is formed in the axial direction of the rotary shaft, the chucking screw is slidably attached to the rotary shaft along the spline, and a support nut that is screwed into the chucking screw is provided. A segment chucking device characterized in that a detent means is attached to the segment chucking device.