JP5128520B2 - Shield machine - Google Patents

Description

  The present invention relates to a shield machine having an erector, and more particularly to a shield machine having a hoist that directly delivers a segment to the erector in the air.

  The supply of segments to the erector is generally performed using a hoist. The hoist travels between a position behind the shape holding device and a position of the erector, and transfers the segment gripped at the rear position to the erector over the shape holding device.

  By the way, in recent years, in order to efficiently deliver the segment to the erector, an erector delivery hoist that can directly deliver the segment to the erector in the air has been used.

  As shown in FIGS. 4A and 4B, the erector delivery hoist 17 has a first traveling portion 37 that travels along the hoist rail 16, and is suspended below the first traveling portion 37 so as to be movable up and down. And a holding mechanism 39 for holding the segment gripping bar 38 on the first traveling portion 37 when the segment gripping bar 38 is raised to a predetermined height. The predetermined height is the height when the segment 8 is directly delivered to an erector (not shown), and the segment gripping bar 38 is held at the first traveling portion 37 at this height, thereby swinging the segment 8. Without fail, it can be delivered to the erector without fail.

JP 2008-163666 A

  However, since the hoist 17 for delivering the erector cannot raise the segment 8 beyond the predetermined height, the girders are thicker than the normal segment 8 as shown in FIG. When the special segment 9 is transported, there is a problem in that it cannot pass through the shape holding device 15 and cannot be transported to an erector (not shown).

  Therefore, the object of the present invention is to solve the above-mentioned problems, and even a special segment with a large girder thickness can be transferred to the front of the shape holding device, and the special segment is supplied to the erector from the erector delivery hoist by air delivery. It is to provide a shield machine that can be used.

  In order to solve the above-described problems, the present invention provides an erector that assembles a segment in a shield frame, a shape holding device that presses an upper inner surface and a lower inner surface of a tunnel wall constructed by assembling the segment with the erector, and the shape holding A first traveling portion that can freely travel from a position in the rearward direction of the apparatus to the position of the erector, and a rigid body that suspends the segment so that the segment can be directly delivered to the erector in the air. In a shield machine equipped with an hoist for delivering an erector that is held by the first traveling unit when lifted to a predetermined height, the shield machine has a second traveling unit that can travel across the shape holding device. And a segment suspension device capable of lifting the segment above the predetermined height, Those having a relay hoist for supplying segment strike.

  A support frame provided on the shield frame and extending inward in the radial direction; a rear deck provided on the support frame extending rearward in the digging direction; and a hoist extending forward and backward on the rear deck and running the above-mentioned erector delivery hoist The relay hoist is preferably provided on the hoist rail behind the erector delivery hoist so as to run freely.

  A temporary placement portion for temporarily placing a segment sent from the rear is disposed on the lower inner surface of the tunnel wall, and the hoist rail has a rear end portion extending to the rear of the temporary placement portion, the rear end It is preferable that a standby unit for allowing the relay hoist to stand by is formed in the unit.

  A proximity sensor that is provided on at least one of the above-described hoist for delivering the elector and the relay hoist, and that detects the other hoist, and is connected to the proximity sensor and connected to both the hoists, and the proximity sensor is connected to the other hoist. And a control device that stops both hoists when the hoist is detected.

  According to the present invention, even a special segment having a thick girder can be transferred to the front of the shape holding device, and the special segment can be supplied to the erector from the erector delivery hoist by air delivery.

FIG. 1 is a schematic side view of a shield machine. FIG. 2 is a side view of the relay hoist. FIG. 3 is a front view of a relay hoist that conveys a segment beyond the shape holding device. FIG. 4A is a side view of the erector delivery hoist during segment conveyance, and FIG. 4B is a side view of the erector delivery hoist before gripping the segment. FIG. 5 is an explanatory diagram for explaining an erector delivery hoist that cannot convey a special segment to the front of the shape holding device.

  As shown in FIG. 1, the shield machine 1 excavates a ground frame forwardly provided on a shield frame 2 that forms the outer periphery of the fuselage, a partition wall 3 that closes the front end of the shield frame 2, and a partition wall 3 that is freely rotatable. A cutter 4, a cutter chamber 5 formed between the cutter 4 and the partition wall 3 and containing earth and sand; a screw conveyor 6 provided through the partition wall 3 as a soil removal device that passes through the partition wall 3 and takes in the earth and sand in the cutter chamber 5; A support frame 7 provided on the shield frame 2 and extending inward in the radial direction, an erector 10 provided on the support frame 7 for assembling the segments 8 and 9 in the shield frame 2, and provided on the support frame 7 extending rearward in the digging direction. The upper inner surface 13 and the lower inner surface 14 of the tunnel wall 12 that is constructed by assembling the rear deck 11 and the segments 8 and 9 provided on the rear deck 11 are radially outward. The shape retaining device 15, the hoist rail 16 provided on the rear deck 11 extending in the front and rear of the shape retaining device 15, and the erector for passing the segments 8, 9 provided on the hoist rail 16 to the erector 10. The hoist 17 for transfer and the hoist rail 16 on the rear side of the hoist 17 for ejector transfer are provided so as to run freely, and the special segment 9 having a thick girder thickness is transferred from the rear to the front of the shape holding device 15 to the hoist 17 for transfer of the elector. A relay hoist 18 for supply is provided.

  The erector 10 includes a ring-shaped swivel frame 19 provided on the support frame 7 so as to rotate coaxially with the shield frame 2, a suspension beam 20 provided on the swivel frame 19 so as to be movable in the radial direction, and a suspension beam. 20 and a first segment gripping portion 21 that grips the segments 8 and 9.

  The rear deck 11 is configured by assembling a long steel material in a box shape, and is arranged at the center of the shield frame 2. On the lower inner surface 14 of the tunnel wall 12 near the rear end of the rear deck 11, a temporary placement portion 22 for temporarily placing the segments 8 and 9 sent from the rear is disposed. The temporary placement unit 22 is formed on the lower end inner surface 14 of the tunnel wall 12 behind the shape holding device 15 so as to be able to run, and is formed at the rear end portion of the segment transfer device 23 that stocks a plurality of segments 8 and 9 arranged in the front and rear direction.

  The segment conveying device 23 is provided on a temporary rail 24 laid on the existing segment 8 so as to be able to run and extend in the front-rear direction, and can be moved up and down on the base portion 25 and provided in a plurality along the longitudinal direction. A lift-up portion 26 for placing the segments 8 and 9 and a slide portion provided on the base portion 25 so as to be slidable back and forth and receiving the segments 8 and 9 collectively when the lift-up portions 26 are lowered. (Not shown). The segment transport device 23 advances the slide portion on which the segments 8 and 9 are placed, then lifts the lift-up portion 26 to transfer the segments 8 and 9 to the lift-up portion 26, retracts the slide portion, and lifts up. By repeating the operation of lowering the portion 26 and delivering the segments 8 and 9 to the slide portion, the segments 8 and 9 are sequentially sent forward.

  Further, a rear rail 27 extending rearward is provided at the rear upper end of the rear deck 11, and a transport hoist 28 for transporting the segments 8 and 9 from the rear to the temporary placement portion 22 is provided along the rear rail 27. It is designed to run.

  As shown in FIGS. 2 and 3, the shape holding device 15 is configured by providing an expansion / contraction jack 30 for expanding / contracting the upper and lower frames 29 a, 29 b between the upper and lower frames 29 a, 29 b expanding in the vertical direction. The shape of the tunnel wall 12 is held by pressing the upper inner surface 13 and the lower inner surface 14 of the tunnel wall 12 radially outward with the upper and lower frames 29a and 29b. The lower frame 29b is formed in a substantially U shape, and has an arcuate pressing portion 31 that is in contact with the tunnel wall 12 at the lower portion. The upper frame 29a is formed in a shape (inverted U shape) obtained by inverting the lower frame 29b substantially vertically. Further, the upper frame 29 is provided with wheels 33 that are placed on the rails 32 of the rear deck 11 when the expansion jack 30 is retracted and the upper frame 29 a is lowered, and one end is connected to the rear deck 11. The other end of the traveling jack 34 is connected, and when the upper and lower frames 29a, 29b are separated from the tunnel wall 12, the traveling jack 34 is expanded and contracted so that the upper and lower frames 29a, 29b are moved on the rail 32 of the rear deck 11. It is designed to run.

  As shown in FIGS. 1 and 5, the hoist rails 16 are provided on the lower surfaces of both sides of the rear deck 11 so as to extend forward of the erector 10 and to extend rearward of the rear deck 11. The hoist rail 16 has an I-shaped cross section, and has a flange portion 35 extending laterally at the lower end. At the rear end portion of the hoist rail 16, a standby portion 36 for waiting the relay hoist 18 is formed. The standby unit 36 is formed on the hoist rail 16 behind the temporary storage unit 22.

  As shown in FIGS. 1, 4 (a), and 4 (b), the erector delivery hoist 17 is provided on the hoist rail 16 so as to be able to travel, and is located at the rear of the shape holding device 15 in the digging direction. A first traveling unit 37 that travels between the placing unit 22 and the erector 10, and segments 8, 9 that are suspended from the first traveling unit 37 so as to be able to move up and down and directly deliver the segments 8, 9 to the erector 10 in the air. And a holding mechanism 39 for holding the segment gripping bar 38 on the first traveling portion 37 when the segment gripping bar 38 is raised to a predetermined height. The first traveling portion 37 includes a support wheel 40 that travels on the flange portion 35 of the hoist rail 16 and a drive wheel 42 that is pressed by the lower surface of the flange portion 35 and driven by the drive device 41. Further, the first traveling unit 37 is provided with a lifting device 44 that hangs the segment gripping rod 38 via a wire 43 so as to be lifted and lowered. The segment gripping bar 38 has a pulley 45 that is engaged with the wire 43, a plate-like lifting base 46 that is suspended by the lifting device 44 via the wire 43, and is provided extending downward on the lifting base 46. A rod-like hanging portion 47; a gripping device 49 provided at the lower end portion of the hanging portion 47; and gripping a handle 48 of the segments 8, 9, and a segment 8, 9 and a support arm 50 that supports 9. The holding mechanism 39 is formed on the lower surface of the first traveling portion 37 and is recessed so as to accommodate the elevating base 46, and is provided to project upward on the outer edge of the elevating base 46. The elevating base 46 is accommodated in the concave 51. And a taper member 52 fitted to the edge of the recess 51.

  The erector delivery hoist 17 is provided with a first proximity sensor 54 that detects the relay hoist 18 and sends a signal to the control device 53 when the relay hoist 18 approaches within a predetermined distance. The control device 53 is programmed to stop both the relay hoist 18 and the erector delivery hoist 17 when receiving a signal from the first proximity sensor 54.

  As shown in FIGS. 2 and 3, the relay hoist 18 includes a pair of second traveling portions 55 that are provided on the hoist rails 16 so as to be able to travel over the front and rear of the shape holding device 15. A segment suspension device 56 provided in the second traveling portion 55 is capable of lifting the special segment 9 above the predetermined height, that is, above the height at which the segments 8 and 9 are delivered to the erector 10. The segment suspension device 56 includes a chain block 57 provided in each second traveling portion 55, a first hook 58 suspended from the chain block 57 so as to be movable up and down, and a detachable engagement with the first hook 58. The connecting member 59 spans between the first hooks 58 and the second hook 61 is connected to the connecting member 59 via the chain 60 and is detachably engaged with the special segment 9. The relay hoist 18 is provided with a second proximity sensor 62 that detects the erector delivery hoist 17 and issues a signal to the control device 53 when the erector delivery hoist 17 approaches within a predetermined distance. The control device 53 is programmed to stop both the relay hoist 18 and the erector delivery hoist 17 when receiving a signal from the second proximity sensor 62.

  Next, the operation of this embodiment will be described.

  When the transport hoist 28 suspending the segments 8 and 9 reaches just above the temporary placement portion 22, the segments 8 and 9 are lowered to the temporary placement portion 22. At this time, the relay hoist 18 is made to wait in the standby unit 36 behind the temporary storage unit 22 so as not to interfere with the segments 8 and 9 that are lowered from the transport hoist 28. The segment conveying device 23 that forms the temporary placement unit 22 sequentially sends the segments 8 and 9 onto the front lift-up unit 26 so that the segments 8 and 9 are always supplied onto the lift-up unit 26 positioned at the front end. .

  When the segment on the lift-up part 26 located at the front end is a normal segment 8 having a thin girder thickness, the segment 8 is forwarded by the elector delivery hoist 17 and delivered to the erector 10. Specifically, when the erector delivery hoist 17 reaches directly above the lift-up unit 26 positioned at the front end of the segment conveying device 23, the segment gripping rod 38 is lowered and the segment gripping rod 38 gripping device 49 is used. The segment 8 on the lift-up part 26 is gripped and the segment gripping bar 38 is raised. When the segment gripping bar 38 is raised to a predetermined height, the lifting base 46 of the segment gripping bar 38 is accommodated in the recess 51, the taper member 52 is fitted to the edge of the recess 51, and the lifting base 46 is moved in the front-rear and left-right directions. It is held in the recess 51 so as not to move. Thereafter, the erector delivery hoist 17 travels forward and delivers the segment 8 directly to the erector 10 in the air. At this time, the segment 8 gripped by the erector delivery hoist 17 is above the pressing portion 31 of the shape holding device 15, and therefore does not interfere with the pressing portion 31.

  Further, when the special segment 9 having a thickness larger than that of the normal segment 8 is placed on the lift-up portion 26 positioned at the front end, the special segment 9 is transferred to the front of the shape holding device 15 by the relay hoist 18. Then, it is supplied to the erector delivery hoist 17 and delivered to the erector 10 via the erector delivery hoist 17. Specifically, the erector delivery hoist 17 is retracted in front of the shape retaining device 15 in advance, and the relay hoist 18 is caused to travel forward from the standby unit 36. When the relay hoist 18 reaches directly above the lift-up part 26 positioned at the front end of the segment conveying device 23, the chain is unwound from each chain block 57 to lower the second hook 61, and the lift-up part 26 The second hook 61 is hung on the special segment 9, and each chain block 57 is wound up to raise the special segment 9 above the pressing portion 31 of the shape holding device 15. Thereafter, the relay hoist 18 is moved forward, and when the special segment 9 exceeds the pressing portion 31 of the shape holding device 15, the special segment 9 is lowered and placed on the existing segment 8. At this time, when the relay hoist 18 approaches the elector delivery hoist 17 beyond a predetermined distance, the proximity sensors 54 and 62 provided on the relay hoist 18 or the elector delivery hoist 17 send a signal to the control device 53, Since the control device 53 stops both the relay hoist 18 and the erector delivery hoist 17, the relay hoist 18 and the erector delivery hoist 17 do not collide. Thereafter, the relay hoist 18 is caused to travel to the standby portion 36, and the erector delivery hoist 17 is caused to travel directly above the special segment 9 placed on the existing segment 8, and this special segment 9 is moved by the erector delivery hoist 17. While gripping and raising to a predetermined height, the hoist 17 for delivering the erector is moved to the position of the erector 10, and the special segment 9 is directly delivered from the erector delivering hoist 17 to the erector 10 in the air.

  In this way, it has the second traveling part 55 that can travel over the front and rear of the shape holding device 15 and has the segment suspension device 56 that can lift the special segment 9 above a predetermined height. Since the relay hoist 18 for supplying the special segment 9 is provided, even if the special segment 9 has a thick girder thickness that cannot be exceeded by the shape holding device 15 with the erector delivery hoist 17, it is transferred to the front of the shape holding device 15. In addition, the special segment 9 can be supplied from the erector delivery hoist 17 to the erector 10 by air delivery.

  A support frame 7 provided on the shield frame 2 and extending inward in the radial direction; a rear deck 11 provided on the support frame 7 extending rearward in the digging direction; and an erector delivery hoist 17 provided extending forward and rearward on the rear deck 11 Since the hoist rail 16 is provided and the relay hoist 18 is provided on the hoist rail 16 behind the elevator hoist 17 so as to be able to run, the special segment 9 can be easily shaped with a simple structure. 15 forward.

  The lower inner surface 14 of the tunnel wall 12 is provided with a temporary placement portion 22 for temporarily placing the segments 8 and 9 sent from the rear, and the hoist rail 16 has a rear end portion extending to the rear of the temporary placement portion 22. Since the standby portion 36 for waiting the relay hoist 18 is formed at the rear end portion, when the segments 8 and 9 are transported to the temporary placement portion 22, the relay hoist 18 interferes with the segment transport. This can be easily prevented with a simple structure.

  Proximity sensors 54 and 62 for detecting the other hoist provided on one of the hoists 17 for the ejector transfer and the relay hoist 18, and connected to the proximity sensors 54 and 62 and connected to both hoists 17 and 18 for proximity Since the control device 53 is provided to stop both hoists 17 and 18 when the sensors 54 and 62 detect the other hoist, the collision between the erector delivery hoist 17 and the relay hoist 18 can be reliably prevented.

  Although the first proximity sensor 54 is provided on the erector delivery hoist 17 and the second proximity sensor 62 is provided on the relay hoist 18, the proximity sensors 54, 62 are connected to the erector delivery hoist 17 or the relay hoist 18. It is good also as what is provided only in either one.

DESCRIPTION OF SYMBOLS 1 Shield machine 2 Shield frame 7 Support frame 8 Segment 9 Special segment 10 Elector 11 Back deck 12 Tunnel wall 13 Upper inner surface 14 Lower inner surface 15 Shape holding device 16 Hoist rail 17 Elector delivery hoist 18 Relay hoist 22 Temporary placement part 36 Standby section 37 First traveling section 38 Segment gripping rod (rigid body)
53 Control Device 54 First Proximity Sensor 55 Second Traveling Unit 56 Segment Suspension Device 62 Second Proximity Sensor

Claims (4)

  An erector that assembles the segments in the shield frame, a shape holding device that presses the upper and lower inner surfaces of the tunnel wall that is constructed by assembling the segments with the erector, and a position of the erector A first traveling portion that can travel to a position, and a rigid body that suspends the segment to directly deliver the segment to the erector in the air, and the first body travels when the rigid body lifts the segment to a predetermined height. In a shield machine equipped with an hoist for delivering an erector that is held by a part, it has a second running part that can run across the shape holding device and can lift the segment above the predetermined height. A segment suspension device for supplying segments to the above-mentioned erector delivery hoist Shield machine characterized by comprising the following hoist.   A support frame provided on the shield frame and extending inward in the radial direction; a rear deck provided on the support frame extending rearward in the digging direction; and a hoist extending forward and backward on the rear deck and running the above-mentioned erector delivery hoist The shield machine according to claim 1, further comprising: a rail, wherein the relay hoist is provided on the hoist rail behind the elevator hoist so as to run freely.   A temporary placement portion for temporarily placing a segment sent from the rear is disposed on the lower inner surface of the tunnel wall, and the hoist rail has a rear end portion extending to the rear of the temporary placement portion, the rear end The shield machine according to claim 2, wherein a standby portion for allowing the relay hoist to wait is formed in the portion.   A proximity sensor that is provided on at least one of the above-described hoist for delivering the elector and the relay hoist, and that detects the other hoist, and is connected to the proximity sensor and connected to both the hoists, and the proximity sensor is connected to the other hoist. The shield machine according to any one of claims 1 to 3, further comprising a control device that stops both hoists when the hoist is detected.

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