JPH052259Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an automatic segment assembly device that connects a new segment to an existing segment using a bolt/nut tightening device, and particularly relates to a segment automatic assembly device that connects a new segment to an existing segment using a bolt/nut tightening device. This invention relates to an automatic segment assembly device with an improved positioning structure.

[Prior art] As shown in Japanese Patent Application Laid-Open No. 60-263674, etc.
A flange having a bolt hole is formed at the end of the segment, and a bolt tightening hole is formed inside the flange, and the segments are stacked on top of each other at the flange to form a vertically and horizontally movable bolt/nut tightening device. 2. Description of the Related Art A so-called automatic segment assembly device is already known which includes a bolt/nut tightening device that is inserted into a bolt tightening hole and tightens a bolt and a nut through the bolt hole.

The above-mentioned bolt/nut tightening device has a bolt holder and a nut rotating device, and inserts the tips of these into bolt holes of a flange formed at the ends of the segments to insert the bolts into the bolt holes of the flange. It is designed to pass through and tighten a nut onto this bolt. The bolt/nut tightening devices are attached to the segment carrying part in the same number as the flanges formed at one end of the segment, so that bolts/nuts can be tightened at one time.

[Problems to be solved by the invention] By the way, there are two types of segments: normal segments SA and tapered segments SB, as shown in Figure 6 A and B, depending on the shape of the tunnel to be constructed in a straight line or in a curved line. . Since the distance from the segment carrier 1 to the flange 2 varies depending on the type of segment, it is necessary to adjust the position of the bolt/nut tightening device each time depending on the shape of the segment.

In the past, the operator had to position the bolt/nut tightening device each time, which was a difficult task.

Therefore, the purpose of the present invention is to solve the above-mentioned problems of the conventional technology and provide an automatic segment assembly device that can automatically position the bolt/nut tightening device, speeding up work and reducing labor. It's about doing.

[Means for Solving the Problems] In order to achieve the above object, the present invention forms a flange having a bolt hole at the end of the segment, and also forms a bolt tightening hole inside the flange, and connects the segment to the flange. In the segment automatic assembly device, a bolt/nut tightening device which is movable vertically and horizontally and superimposed on each other is inserted into the bolt tightening hole to tighten the bolt and nut through the bolt hole. The attachment device is provided with a guide plate whose tip width is gradually reduced for guiding the bolt/nut tightening device to the bolt tightening hole by being regulated while being inserted into the bolt tightening hole.

[Function] When the bolt/nut tightening device is vertically lowered, the tip of the guide plate is first inserted into the bolt tightening hole of the segment and regulated, and is inserted following the bolt tightening hole.

The bolt/nut tightening device is moved horizontally by this guide plate and positioned to correspond to the bolt tightening hole.

In this way, the positioning of the bolt/nut tightening device is automatically performed, thereby speeding up the work and reducing labor.

[Embodiment] A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

In Fig. 1, SZ is an existing segment, and S is a new segment to be connected to the existing segment SZ.A flange 2 having bolt holes 3 is provided at each end, and inside the flange 2 is a segment upper surface. Bolt tightening hole 4 opened in
is formed. The shield excavator generally has a segment transport section 1 that supports the new segment S and transports it to a predetermined position of the existing segment SZ,
In this segment carrying section 1, bolts and nuts are tightened to connect the two segments by passing bolts 5 through the bolt holes 3 of the new segment S and the existing segment SZ, which are positioned with flanges 2 superimposed on each other, and tightening nuts 6 thereto. A device 7 is mounted for vertical and horizontal movement. This bolt/nut tightening device 7 has a pedestal 9 on which a guide rod 8 is hung parallel to the axial direction of the bolt hole 3, and a bolt holder 10 whose tip end is suspended from the guide rod 8 and a nut rotating device are attached to the guide rod 8. 11
The proximal end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions of the base end portions are slidably supported.

The tips of the bolt holder 10 and the nut rotating device 11 are formed in a size that can be inserted into the bolt tightening holes 4 of the respective segments S and SZ, and the tips of the bolt holder 10 are formed on the inner wall so as to be inserted into the bolt holes 3. A bolt head engagement hole 12 is formed to engage and support the head 5a of the bolt 5.

The bolt head engaging hole 1 of the nut rotating device 11
A socket 13 that engages a nut 6 to be screwed onto the bolt 5 and rotates the nut 6 is provided in a portion facing the bolt 5.
is attached via a bearing 14, and this socket 1
The driven gear 15 integrally formed on the outer periphery of the motor 1 attached to the base end of the nut rotating device 11
Six drive gears 17 are connected via an intermediate gear 18. 19 is a shaft supporting the intermediate gear 18.

These bolt holders 10 and nut rotating device 11
In order to horizontally move the bolt holder 10, a first cylinder 21 is attached to the pedestal 9, in which a piston rod 21a is connected to an arm 20 protruding from the base end of the nut rotating device 11. A second cylinder 22 to which a piston rod 22a is connected is attached to the base end of the cylinder. In addition, in order to move the bolt holder 10 and the nut rotating device 11 vertically up and down in order to insert them into the bolt tightening holes 4 of the segments S and SZ, a lifting guide rod is attached to the segment carrying section 1 via a bracket 23. 24 hangs down, and the pedestal 9 is supported on the elevating guide rod 24 so as to be able to rise and fall freely, and the elevating cylinder 25 that connects the pedestal 9 with a piston rod 25a is attached to the bracket 23.
is installed.

In order to position the thus configured bolt/nut tightening device 7 with respect to the bolt tightening holes 4 of the segments S and SZ, in this embodiment, a nut rotating device is used as shown in FIGS. 1 and 2. On the side of 11, there is a guide plate 26 which is inserted into the bolt tightening hole 4 of the new segment S before the tip of the bolt holder 10 and whose tip width regulated by the bolt tightening hole 4 is gradually reduced. installed. That is, this guide plate 26 extends horizontally from the side of the nut rotating device 11 to the side of the bolt holder 10 and hangs downward, and its tip part is inserted into the bolt tightening hole 4 of the new segment S while being regulated. By doing so, the nut rotating device 11 is set to position the bolt tightening hole 4 of the existing segment SZ. Also, guide plate 2
The width w of 6 is formed to a size that can cover the bolt 5 supported by the bolt holder 10. During this positioning, the hydraulic pressure of the first cylinder 21 is released to allow free movement of the nut rotating device 11, and the second cylinder 22 tightens the distance between the bolt holder 10 and the nut rotating device 11 by tightening the adjacent bolts. The hydraulic pressure is locked in accordance with the spacing between the holes 4.

Next, the operation of the embodiment will be described.

First, after attaching the bolt 5 to the bolt holder 10 and the nut 6 to the nut rotating device 11, the new segment S is supported by the segment carrying section 1 and carried to a predetermined position on the existing segment SZ, and the bolt and
The nut tightening device 7 is positioned. At this time, the hydraulic pressure of the first cylinder 21 is released, and the second cylinder 22 is connected to the bolt holder 10 and the nut rotating device 1.
The oil pressure is locked to maintain a predetermined distance from 1. In this state, the lifting cylinder 25 lifts the bolt.
When the nut tightening device 7 is lowered, the tip of the guide plate 26 is first inserted into the bolt tightening hole 4 of the new segment S and is regulated by the bolt tightening hole 4, and as shown in FIG.
Nut rotating device 1 for SZ bolt tightening hole 4
1 is inserted into the bolting hole 4 of the new segment S, and the bolt holder 10 is also positioned and inserted into the bolting hole 4 of the new segment S at the same time.

When the positioning and insertion of the bolt/nut tightening device 7 into the bolt tightening hole 4 is completed in this way, the first cylinder 21 positions the nut 6 near the bolt hole 3, and the second cylinder 22 tightens the bolt. 5 to bolt hole 3 of flange 2
, and by rotating the nut 6, tighten it onto the bolt 5, thereby completing the connection of the segments.

In this way, since the guide plate 26 is provided which guides the bolt/nut tightening device 7 by being first inserted into the bolt tightening hole 4 into which it is to be inserted and is regulated, it is possible to select different types of segments. Regardless, the bolt/nut tightening device 7 can be accurately positioned in the bolt tightening hole, thereby speeding up the segment assembly work and reducing labor.

4 and 5, the guide plates 26a, 26 are attached to the bolt holder 10 and the nut rotating device 11.
A modification example in which b is attached respectively is shown. As shown in the figure, on the side of the bolt holder 10, there is a guide plate 26a whose lower part is gradually reduced to a triangular shape, and a shaft 27 spanned between both widthwise ends of the guide plate 26a is slidably passed through a shaft hole formed in the bolt holder 10. A guide plate 2 is attached to the bolt 5 so as to be movable in the axial direction thereof, and is provided on the side of the nut rotating device 11 so as to protrude from its lower end, and whose lower part is gradually reduced to a triangular shape.
6b is fixed. Further, in the guide plate 26a of the bolt holder 10, springs 28 are installed between the bolt holder 10 on the shaft 27 and both ends of the guide plate 26a, and these springs 28 are inserted into the bolt tightening holes 4 of the guide plate 26a. The spring force is set such that the bolt holder 10 is urged to be located at the center of the guide plate 26a during positioning, while allowing movement of the bolt holder 10 when tightening the bolt 5 and nut 6.

According to this configuration, the bolt holder 10 and the nut rotating device 11 are connected to the segments S, by the guide plates 26a and 26b provided respectively.
Each is positioned in bolt tightening hole 4 of SZ,
The same effect as the above embodiment is achieved.

[Effects of the invention] In summary, the present invention provides the following excellent effects.

When inserting the bolt/nut tightening device into the bolt tightening hole of the segment, the guide plate is inserted into the bolt tightening hole first and guided, thereby positioning the bolt/nut tightening device. Automatic positioning is achieved with an extremely simple structure, and accurate positioning can be performed regardless of the type of segment, speeding up work and reducing labor.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention, FIG. 2 is a schematic sectional view taken along the line A-A in FIG. FIG. 4 is a side sectional view showing another embodiment, and FIG.
The drawings are a schematic cross-sectional view taken along the line B--B in FIG. 4, and FIG. 6 is an explanatory diagram showing the positional relationship between the types of segments and the bolt/nut tightening device. In the figure, S is a new segment, SZ is an existing segment, 2 is a flange, 3 is a bolt hole, 4 is a bolt tightening hole, 5 is a bolt, 6 is a nut, 7 is a bolt/nut tightening device, and 26 is a guide plate. be.

Claims (1)

[Scope of utility model registration request] A flange with a bolt hole is formed at the end of the segment, and a bolt tightening hole is formed inside the flange, and the segments are superimposed on each other at the flange so that the bolts can be moved vertically and horizontally.
In a segment automatic assembly device that inserts a nut tightening device into the bolt tightening hole and tightens the bolt and nut through the bolt hole, the bolt/nut tightening device inserts the nut into the bolt tightening hole in advance. 1. A segment automatic assembly device, characterized in that a guide plate is provided, the width of which is gradually reduced at the tip of the guide plate for guiding a bolt/nut tightening device to a bolt tightening hole.