JP2559155B2 - Segment feeder - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for supplying a segment assembled in a ring shape on a digging surface of a shield tunnel below a segment assembling device of a shield machine.

<Prior art> As is well known, the shield construction method is a construction method for constructing a tunnel in the ground, and as one type of this type of construction method, a reinforced concrete pre-formed behind the shield excavator as it is dug There is a method of assembling the manufactured segment in an annular shape and applying the reaction force of the propulsion jack of the shield machine to this segment.

The segments used for such an application are supplied to a segment assembling device installed at the rear part of the shield machine and assembled in a ring shape.

However, recently, the diameter of shield tunnels has tended to increase, and one piece of the tunnel has weighed several hundred kilograms, making it difficult to transport and supply by people.

Therefore, for example, Japanese Unexamined Patent Publication No. 64-10900 proposes a carrier device that supplies segments below the segment assembling device without manual labor.

The transfer device disclosed in the publication includes a frame fixed to the rear part of the shield machine, a first moving body supported by the frame so as to be capable of reciprocating in the axial direction of the tunnel, and the first movement. A second moving body movably supported in the body in the axial direction and two drive mechanisms for moving the first and second moving bodies respectively are provided, and the segment is assembled by the second moving body in the segment assembling apparatus. Move it down.

However, the segment transport device having such a configuration has a technical problem described below.

<< Problems to be Solved by the Invention >> That is, the device disclosed in the above publication is inefficient because it can supply only one segment at a time.
A segment storage location is required near the transport device.

Here, even if it is improved so that a plurality of segments can be supplied, since the transport device is fixed to the shield excavator, when the shield excavator is excavated, the transport device is also integrated therewith. It becomes difficult to move and place the segments on the transfer device.

In addition, the above-described transport device requires two driving devices for driving the first and second moving bodies, respectively, and thus has a problem that the entire structure is complicated.

The present invention has been made in view of such a conventional problem, and an object of the present invention is to eliminate the need for a storage area near a supply device and to supply a plurality of, for example, one ring segments. Another object of the present invention is to provide a segment supply device which can be manufactured and has a simple drive system structure.

<< Means for Solving the Problem >> In order to achieve the above object, the present invention provides a plurality of segments that can be mounted in a segment feeder that is annularly assembled to the rear side of the shield machine as the shield machine advances. A main body portion having a different length, which is placed on an existing segment and extends in the axial direction of the tunnel, and a segment feed mechanism for sequentially moving the segments placed on the rear portion of the main body portion forward, Engaging with the most advanced segment moved by the segment feeding mechanism, and mounting the segment received from the main body part, and consisting of a bouncing mechanism protruding below the segment assembly device of the shield machine, In addition, the segment feed mechanism is guided by the main body portion and moves along the guide plate, and a jar for moving the guide plate back and forth along the main body portion. A pusher that is pivotally attached to the guide plate so as to be swingable, stands up when the guide plate advances and engages with the end surface of the segment, and abuts against the outer surface of the segment when the guide plate retreats. It is characterized by comprising a plate.

The main body may be provided with a sliding surface or a roller that makes sliding contact with the outer surface of the segment.

The bouncing mechanism has a sliding surface or a roller on the upper side that is in sliding contact with the outer surface of the segment, and
It is preferable to provide a locking means for connecting the leading edge segment with the guide plate in a state of being received by the assembling device.

<< Advantageous Effects of the Invention >> According to the segment supply device configured as described above, since the main body portion has a length capable of mounting a plurality of segments, for example, one ring, the supply device is provided with a segment storage function. Since the supply device can be provided and the supply device is separated from the shield machine, it is possible to place the segment on the supply device in parallel with the excavation of the shield machine.

In addition, the plurality of segments are sequentially moved from the main body portion to the bouncing mechanism by the segment feeding mechanism and are supplied below the segment assembling device of the shield machine, and since this operation is performed only by driving the segment feeding mechanism, The structure and control are simplified, and the plurality of segments can be easily fed sequentially below the feeding device by the expansion and contraction of the jack.

According to the configuration of claim 2, the segment can be smoothly moved.

According to the structure of claim 3, the segment can be smoothly moved on the bouncing mechanism, and the segment can be easily assembled to the lower portion of the tunnel.

Embodiment Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 8 show an embodiment of a segment supply device according to the present invention.

The segment feeder shown in the figure is a shield machine 10
Digging machine, for example, digging machine 10 with digging one ring
On the excavation surface formed at the rear end of the
When assembling g in an annular shape by the assembling device 14, the segment 12a for one ring is placed at a predetermined position below the assembling device 14.
.. g are sequentially supplied, and the supply device is composed of a main body portion 16, a segment feed mechanism 18, and a bouncing mechanism 20.

The member indicated by reference numeral 22 in FIG. 1 is a shield machine.
This is a shield jack for advancing the 10 by taking a reaction force to the existing segment 24.

As shown in FIG. 2 to FIG. 5, the main body portion 16 is placed on the existing segment 24 and a pair of horizontal main body frames 16 arranged in parallel extending in the tunnel axial direction to be constructed.
It has a frame that is assembled in a substantially U shape and is composed of a and a vertical main body frame 16b that connects the horizontal frame 16a at the rear side.

A plurality of first rollers 16c, which roll while slidingly contacting the outer surfaces of the mounted segments 12a to 12g, are rotatably provided along the outer surface of each of the lateral main body frames 16a so as to be rotatable in the axial direction. It is supported.

A guide 16d having an L-shaped cross section is fixedly provided inside each horizontal body frame 16a.

Further, a plurality of second rollers 16e that roll along the frame of the bouncing mechanism 18 are rotatably supported on the tip end side of each horizontal body frame 16a.

The segment feed mechanism 18 includes a guide plate 18a having a concave cross section installed between the horizontal main body frames 16a, a jack 18b fixed to the center of the vertical main body frame 16b, and a guide plate 16a.
It is roughly configured by a plurality of pushing plates 18c pivotally attached to a.

On both side surfaces of the guide plate 18a, guide pieces 18d that engage with the guides 16d fixed to the horizontal body frame 16a are provided in a protruding manner.

The expansion and contraction plunger 18e of the jack 18b is fixed to the rear end of the guide plate 18a, and the expansion and contraction operation of the plunger 18e causes the guide plate 18a to be guided by the guide 16d to move back and forth along the axial direction of the horizontal main body frame 16. To do.

The push-out plates 18c are formed in a substantially trapezoidal cross section, and a plurality of push-out plates 18c are provided at equal intervals with a length slightly larger than the width of the supply segments 12a to 12g. In this state, as shown by the solid line in FIG. 6, a part of the guide plate 18a projects upward from the upper end and engages with the end faces of the segments 12a to 12g mounted on the main body 16. .

On the other hand, when the guide plate 18a is retracted, as shown by the phantom line in FIG. 6, the guide plate 18a is brought into contact with the end surfaces and outer surfaces of the segments 12a to 12g and is pivoted so that the guide plate 18a lies inside the guide plate 18a. Is set.

The bounce mechanism 20 is a pair of first and second bounce frames arranged on the tip side of the main body 16 and installed so as to sandwich the horizontal body frames 16a.
There is provided a frame having a concave plane, which is composed of 20a, 20b and a vertical projecting frame 20c connecting the four horizontal projecting frames 20a, 20b at one end side.

Two inner and outer rollers 20d and e for receiving the segments 12a to 12g from the main body 16 are provided on the upper sides of the first and second laterally projecting frames 20a and 20b, respectively.

A stopper 20f that engages with the end of the most advanced segment 12a is fixedly provided at the end of the vertical flip frame 20c.

Further, the rebound mechanism 20 is provided with a locking means 26 which is connected to the guide plate 18a and moves the guide plate 18a back and forth.

The locking means 26 of this embodiment, as shown in detail in FIG. 7, includes a pin 26a provided on a guide plate 18a and a pair of first first and second first horizontal frames 20b disposed on the inner surface of the second horizontal ejection frame 20b. And second locking metal fittings 26b and 26c.

The pin 26a is inserted into an L-shaped hole portion 26d formed by a horizontal portion and a vertical portion formed on the side surface of the guide plate 18a.

The first metal fitting 26b is fixed to the side surface of the frame 20b, and has a height for locking the end portion of the pin 26a protruding from the side surface of the guide plate 18a.

On the other hand, the second locking metal fitting 26c is provided at a position spaced from the first locking metal fitting 26b on the side surface of the frame 20b at a position where it does not interfere with the pin 26a, and the arm inclined obliquely downward is located at this position. The lower end of the swinging arm pivotally attached to the first metal fitting 26b is substantially at the same position as the first metal fitting 26b.

In the locking means 26 configured in this manner, when the pin 26a is positioned in the vertical portion of the hole portion 26d, the end of the pin 26a protruding from the side surface of the guide plate 18a moves below the locking metal fittings 26a, b. While passing, while the pin 26a is positioned in the horizontal portion of the hole 26d, the end of the pin 26a engages with the first locking metal fitting 26d when the guide plate 18a retreats, and the guide plate 18a and the bounce frame. 20
a and b will be connected.

Next, the operation of the segment supply device having the above configuration will be described.

In the operation of the supply device, first, the alignment with the segment gripping position A of the assembling device 14 is performed, and the first segment 12a is placed at the mounting position B on the rear side of the main body 16 by a crane or the like.

Next, when the jack 18a is driven and the plunger 18e is extended, the guide plate 18a moves forward accordingly, and the pushing plate 18c causes the segment 12a to move forward of the main body 16 while rotating the first roller 16c. Be moved.

Then, at the mounting position B of the main body portion 16, the segments 12a to 12g
Once the mountable width of the is secured, this time the plunger 18e
Is reduced.

At this time, the push-out plate 18c located in front of the segment 12a collides with the end face of the segment 12a and rotates forward, and passes through it while contacting the lower surface of the segment 12a, so that the segment 12a moves into the plunger 18e. Has moved forward by a distance corresponding to the extension stroke of and stopped at that position.

Next, when the next segment 12b is placed at the mounting position B, the jack 18a is driven again to expand and contract the plunger 18e in the same manner as described above. Segment 12a ~
g is sequentially fed forward, and in the example shown in FIG. 2, the two segments 12a, 12b on the tip side are received on the outer roller 20e of the ejection mechanism 20.

And as shown in Fig. 2, the most advanced segment 12
When a contacts the stopper 20f of the bounce mechanism 20, the next extension of the plunger 18e causes the frame 2 of the bounce mechanism 20 to move.
0a, b, c are advanced over the existing segment 24 and project from this to the position where the segments 1a-g are to be assembled, as shown in phantom in FIG.

In this state, the most advanced segment 12a mounted on the spring-out mechanism 20 is set at the gripping position A of the assembling apparatus 14, and the assembling apparatus 14 is driven and gripped.

When the segment 12a is grasped and removed from the ejection mechanism 20, the coupling mechanism 26 connects the ejection mechanism 20 and the guide plate 18a in this embodiment.

FIG. 8 shows the operation at this time, and in the connection, the pin 26a of the locking means 26 is pulled up to the horizontal portion of the hole 26d.

In this state, when the guide plate 18a moves rearward due to the contraction of the plunger 18e, the end portion of the pin 26a has the first locking fitting 26b.
Since it engages with the end of the guide plate 18a, the bouncing mechanism 20 also retracts as the guide plate 18a retracts.

The reason why the bouncing mechanism 20 is retracted in this way is that if the bouncing mechanism 20 remains advanced, it is not possible to install a segment below the bouncing mechanism 20.
When the 20 is retracted, the segment 12a is installed below.

Then, due to the extension of the next plunger 18e, the segment 12b is moved to the tip position, and the next plunger 18e
Extending causes the end of the segment 12b to come into contact with the stopper 20f, and the rebound mechanism 20 is advanced again.

Then, at the time of contraction of the plunger 18e thereafter, the end of the pin 26a is connected to the guide plate 18a and the spring-out mechanism 20 and is retracted together. Since the pin 26a automatically moves from the horizontal part of the through hole 26d to the vertical part by hitting the end of the guide plate 18a, the bouncing mechanism 20 does not follow the forward and backward movement of the guide plate 18a. Subsequent work is carried out while being positioned on the segment 12ad, and the leading edge segment sequentially fed by the forward / backward movement of the guide plate 18a by driving the jack 18b is grasped and assembled by the assembling device 14.

When the assembly of one ring is completed, the shield machine 10 is advanced by driving the shield jack 22. At this time, the supply device can also be advanced by a self-propelled type.

Now, according to the segment supply device having the above configuration, since the main body portion 16 has a length capable of mounting a plurality of segments 12a to 12g, for example, one ring, the supply device is provided with the segments 12a to 12g. In addition to having a storage function, the supply device is separated from the shield machine 10, so that the segments 12a to 12g can be placed on the supply device in parallel when the shield machine 10 is excavated. it can.

Further, the plurality of segments 12a to 12g are sequentially moved from the main body portion 16 to the bouncing mechanism 20 by the segment feed mechanism 18 and supplied to a predetermined position below the segment assembling device 14 of the shield machine 10, and this operation is performed. Segment feed mechanism
Since only the 18 jacks 18b are driven, only one drive is required and the structure and control are simplified.

Further, since the horizontal body frame 16a of the body portion 16 is provided with the rollers 16c which are in sliding contact with the lower surfaces of the segments 12a to 12g, the segments 12a to 12g can be smoothly moved.

Further, since the bouncing mechanism 20 is provided with the rollers 20d, e arranged inside and outside, the segments 12a to 12g on the bouncing mechanism 20 can be smoothly moved, and the segments of different lengths can be smoothly moved. We can also support supply.

Furthermore, since the ejecting mechanism 20 can be connected to the guide plate 18a of the segment feeding mechanism 18 by the locking means 26, if necessary, the segment can be easily assembled to the lower portion of the tunnel.

In the above embodiment, the main body 16 and the splash mechanism are
20 rollers 16c, 20 that are in sliding contact with the outer surfaces of the segments 12a to g
Although the example in which d and e are provided is illustrated, the present invention is not limited to this, and for example, a sliding surface that makes sliding contact with the outer surface of the segments 12a to 12g is provided, or a roller and a sliding surface are provided. It is also possible to use together.

[Brief description of drawings]

FIG. 1 is a side view showing an example of a segment supply device according to the present invention, FIG. 2 is a plan view showing a state shown by a solid line in FIG. 1, and FIG. 3 is shown by a virtual line in FIG. FIG. 4 is a plan explanatory view of a state, FIG. 4 is a sectional view taken along line AA of FIG. 1, and FIG.
FIG. 6 is a sectional view taken along the line BB of FIG. 6, FIG. 6 is an explanatory view of the pushing plate, FIG. 7 is an explanatory view of the locking means, and FIG. 8 is an operation explanatory view of the locking means shown in FIG. 10 …… Shield machine 12a ～ g …… Segment 14 …… Assembly device 16 …… Main body 18 …… Segment feed mechanism 20 …… Bounce mechanism 24 …… Existing segment

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuji Hosaka 1-10-4 Minamidai, Kawagoe City, Saitama Prefecture Obayashi Corporation Tokyo Machinery Factory (72) Inventor Naoki Ueda 2-3 Kandajicho, Chiyoda-ku, Tokyo Shares Obayashi Corporation Tokyo Head Office (56) References: 62-7497 (JP, U)

Claims (3)

(57) [Claims] 1. A segment supply device, which is annularly assembled on the rear side of a shield excavator as it excavates, has a length at which a plurality of segments can be placed and is placed on an existing segment. A main body portion extending in the axial direction of the tunnel, a segment feed mechanism for sequentially moving the segments mounted on the rear portion of the main body portion forward, and engagement with the leading edge segment moved by the segment feed mechanism. Then, the segment received from the main body portion is placed and the ejection mechanism protrudes below the segment assembly device of the shield machine, and the segment feed mechanism is guided to the main body portion and A guide plate that moves along the guide plate, a jack that moves the guide plate back and forth along the main body portion, and a guide plate swingably attached to the guide plate. Together to engage the end face of the segment with the upright at the time of forward movement of the plate, the guide plate segments supply apparatus characterized by comprising a pushing plate which lie down in contact with the outer surface of the segments during retraction of. 2. The segment supply device according to claim 1, wherein the main body portion has a sliding surface or a roller that is in sliding contact with the outer surface of the segment. 3. The bouncing mechanism has a sliding surface or a roller on the upper side, which is in sliding contact with the outer surface of the segment, and the guide plate with the leading edge segment being received by the assembling apparatus. The segment supply device according to claim 1 or 2, further comprising locking means for connecting the segments.