JPH0455113Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an improvement of a shield excavator for laying a small diameter pipe underground.

(Prior art) Shield excavators used for laying pipes in sewerage construction have conventionally had a bulkhead integrally fixed inside the front end of a cylindrical shield body called a skin plate, and a It houses the cutter rotating shaft, its drive device, speed reducer, supporting metal fittings for these, mud feed/discharge pipes and other piping, various instruments, etc.

Moreover, the smaller the diameter of the shield excavator, the longer the length of the shield body is formed compared to its diameter.

(Problem to be solved by the invention) In such a shield excavator, the front end is closed by a bulkhead, and only the rear open end leads to the inside. As the skin plate, which is the main body, is relatively long, it is extremely difficult to store and assemble the cutter rotating shaft, its drive device, various equipment, etc. inside because there is too little working space. Therefore, manufacturing a shield excavator requires time and effort, and maintenance during use, etc.
There were problems such as the inability to easily inspect, repair, and replace parts.

The present invention provides a shield excavator that solves these problems.

(Means for Solving the Problems) As shown in the drawings corresponding to the embodiments, the shield excavator of the present invention has a cylindrical body having a ring-shaped mounting bracket 2 around the inner peripheral surface of the front end opening. 1
A partition wall 3 is removably inserted into the cylindrical body 1 and is connected and fixed to the back surface of the mounting bracket 2, and has a bearing 4 integrally provided in the center thereof, and a partition wall 3 on the outer periphery of the partition wall 3 A plurality of horizontal support frame portions 5b are protruded rearward at appropriate intervals in the circumferential direction, and the outer peripheral surface of an annular frame 5d disposed behind the bearing 4 and the rear end of these horizontal support frame portions 5b. A support frame 5 consisting of a vertical frame portion 5c integrally arranged between the support frames 5, a rotary drive device 6 fitted and fixed to the annular frame 5d of the support frame 5, and a rotation of the rotary drive device 6. The shaft 9 is rotatably inserted into and supported by the bearing 4 so as to project forward, and a cutter 15 is attached to the projecting end.

(Function) The cutter rotation shaft 9, the cutter rotation drive device 6, etc. are installed in advance on the bulkhead 3 and the support frame 5 integrated with the bulkhead 3, and then the bulkhead 3 is attached.
is inserted into the shield body 1 from the rear open end of the shield body 1 and integrated, and the cutter 1 is attached to the rotating shaft 9 protruding forward from the bearing 9 provided in the center of the partition wall 3.
5 to configure a shield excavator.

The support frame 5 integrated with the partition wall 3, which is removably inserted into the cylindrical body 1, has a plurality of horizontal support frame parts 5b protruding rearward from the partition wall 3.
Since the space between the adjacent horizontal support frames 5b, 5b is open, it is possible to replace, maintain, and inspect the equipment inside the support frame 5, as well as repair and replace parts in the event of a failure, through the open part. It is.

(Example) To explain the example of the present invention with reference to the drawings, 1
1 is a cylindrical main body of a shield excavator, and a ring-shaped mounting bracket 2 is integrally provided inwardly at the front end opening of the main body.

3 is inserted into the inside of the cylindrical shield body 1,
As shown in FIG. 5, these partition walls are removably fitted together, and as shown in FIG. The support frame 5 has horizontal frame parts 5b protruding from three rear ends of a short cylindrical part 5a provided around the outer periphery of the partition wall 3, and vertical frame parts 5c connected to the rear ends of the horizontal frame parts 5b. , an annular frame 5d is integrally provided at the center where these vertical frame parts 5c intersect, and the outer peripheral end surfaces of the short cylindrical part 5a and the vertical frame part 5c are slidably connected to the inner peripheral surface of the shield body 1. , is supported.

Reference numeral 6 denotes a rotary drive device having a speed reducer 7 inserted into the annular frame 5d of the support frame 5, and is fixed to the annular frame 5d with bolts and nuts 8, and its rotating shaft 9 is connected to the partition wall via a coupling 10. It is rotatably inserted and supported by the bearing 4 of No. 3.

Reference numeral 11 denotes a cylindrical hood having a ring-shaped bracket 12 disposed around the rear end toward the inner circumference, and the back surface of the ring-shaped bracket 12 is connected to the shield body 1.
is joined to the front surface of the mounting bracket 2, and the front outer periphery of the partition wall 3 is joined to the back surface of the mounting bracket 2 via the seal 13, and these three parts are separably fixed and integrated with bolts and nuts 14. There is.

Reference numeral 15 denotes a cutter detachably attached to a rotary shaft 9 protruding from the partition wall 3 into the hood 11.

Reference numerals 16 and 17 denote a mud feeding pipe and a mud draining pipe arranged in the support frame 5, the opening front end of which passes through the partition wall 4 and faces into the cylindrical hood 12, and the rear end is a cylindrical pipe. In the cylindrical tail portion 19 connected to the rear end of the main body 1 via the tail packing 18, it is connected to a flexible tube 21 having a joint 20, and a feed and mud removal tube (not shown) is further connected to the joint 20. The excavated soil and circulating mud are discharged together to the shaft side.

Reference numeral 22 denotes a direction correction jack whose front ends are attached to three sides of the back surface of the vertical frame portion 5c of the support frame 5 in the cylindrical main body 1, and whose rear end is connected and supported to the inner circumferential surface of the cylindrical tail portion 19. This is to correct the direction of the cylindrical body 1 with respect to the cylindrical body 1.

Reference numeral 23 denotes a temporary pipe or laying pipe that follows the rear end of the tail portion 19.

In the shield excavator, the cutter rotation drive device 6, reduction gear 7, coupling ring 8, rotating shaft 9, mud feeding and draining pipes 16, 17, etc. are assembled in advance in the support frame 5 of the bulkhead 3, as described above. Thereafter, the partition wall 3 is inserted into the shield main body 1 and fixedly integrated, thereby being assembled.

The shield excavator configured in this manner excavates from the starting shaft side toward the destination shaft while rotating the cutter 2, sends the excavated earth and sand, and sends the excavated earth and sand through the mud removal pipe 1.
6 and 17 to the ground, and the tubes are buried underground by a propulsion method while being sequentially followed by the tubes 23 to be laid in the tail portion 19.

Note that the cylindrical hood 11 may be constructed as shown in FIG. 6 in addition to the structure described above.

That is, a mounting cylindrical portion 11b having an inner diameter equal to the outer diameter of the cylindrical main body 1 is removably fitted onto the outer circumferential surface of the main body 1, and a ring-shaped bracket 12 is attached to the bracket 2 of the main body 1 on the inner circumferential surface of the front end thereof. established around
The cutter 15 may be disposed in the hood portion 11a in front of the bracket 12.

(Effect of the invention) As described above, the shield excavator of the invention includes a cylindrical body 1 having a ring-shaped mounting bracket 2 around the inner peripheral surface of the front end opening, and a cylindrical body 1 that can be inserted into and removed from the cylindrical body 1. A partition wall 3 which is freely inserted and joined and fixed to the back surface of the mounting bracket 2 and has a bearing 4 integrally provided in the center thereof, and a plurality of horizontal bars arranged at appropriate intervals in the circumferential direction on the outer periphery of this partition wall 3. The outer peripheral surface of an annular frame 5d, which has a supporting frame portion 5b protruding rearward and is arranged behind the bearing 4, and these horizontal supporting frame portions 5.
A support frame 5 consisting of a vertical frame portion 5c integrally connected between the rear ends of b, and this support frame 5
A rotary drive device 6 is inserted and fixed in the annular frame 5d, and a rotary shaft 9 of the rotary drive device 6 is rotatably inserted and supported by the bearing 4 to project forward, and is attached to the projecting end thereof. Since the shield main body 1 and the partition wall 3 are formed separately, the cutter rotation drive is provided in advance in the support frame 5 integrated with the partition wall 3. Since various equipment such as the device 6 and piping can be arranged, the various equipment and piping can be easily stored and assembled regardless of the work space.

Further, the support frame 5, which is integrated with the partition wall 3 and is removably inserted into the cylindrical body 1, has a plurality of horizontal support frame portions 5b protruding rearward from the partition wall 3, Since the space between the support frame parts 5b and 5b is open, not only is it possible to use the open part when assembling the above-mentioned various devices to perform easy and smooth assembly work, but also after assembly.
Through the open portion, it is possible to easily and efficiently perform replacement, maintenance, and inspection of equipment within the support frame 5, as well as repair and replacement of parts in the event of a failure.

Furthermore, after various devices are assembled in the support frame 5 that is integrated with the partition wall 3 as described above, this support frame 5 can be inserted and integrated into the cylindrical body 1, making it easy to assemble the shield excavator. This is particularly effective for small-diameter shield excavators.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal cross-sectional side view thereof, and FIGS. 2 to 4 are FIGS. 1A-A.
5 is a perspective view of a bulkhead having a support frame, and FIG. 6 is a sectional view showing another structure of the hood. DESCRIPTION OF SYMBOLS 1... Shield body, 3... Partition wall, 4... Bearing, 5... Support frame, 6... Rotation drive device,
9...Rotation axis.

Claims (1)

[Scope of utility model registration request] A cylindrical body 1 having a ring-shaped mounting bracket 2 around the inner circumferential surface of the front end opening, and this cylindrical body 1.
A partition wall 3 is inserted and removably inserted into the mounting bracket 2 and is connected and fixed to the back surface of the mounting bracket 2, and has a bearing 4 integrally provided in the center thereof, and a partition wall 3 is provided on the outer periphery of the partition wall 3 at appropriate intervals in the circumferential direction. A plurality of horizontal support frame portions 5b are provided to protrude rearward, and the outer circumferential surface of an annular frame 5d disposed behind the bearing 4 and the rear ends of these horizontal support frame portions 5b are integrally connected. A support frame 5 consisting of a vertical frame portion 5c, a rotary drive device 6 fitted and fixed to the annular frame 5d of this support frame 5, and a rotation shaft 9 of this rotary drive device 6 connected to the bearing 4. A cutter 1 is rotatably inserted, supported and protruded forward, and is attached to the protruding end.
5. A shield excavator characterized by comprising: