Open shield machine

Abstract

To provide an open shield machine equipped with box hoisting equipment used for laying concrete boxes in narrow places where overhead restrictions exist such as under elevated tracks where cranes cannot be used, and which has a low ground height while ensuring a predetermined lifting height of a hoisting machine.SOLUTION: A machine body, consisting of left and right side wall panels and a bottom panel, is divided longitudinally into a front machine and a tail machine, and columns 29 are erected at four corners of an upper end of the tail machine of the open shield machine 1 to support a girder member 30 on which a travelable facility equipped with a hoisting machine 34 is mounted. The girder member 30 protrudes upward from a rectangular frame structure that binds the upper ends of the columns 29 together, thereby keeping the height of the columns 29 low.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to an open shield machine for laying concrete boxes and U-shaped concrete open channels. [Background technology]

[0002] The open shield machine used in the open shield construction method is known to be one that can easily and quickly suspend and lower a box body without taking up space, as shown in the following patent document. [Patent Document 1] Patent No. 3194190

[0003] As shown in Figures 16 and 17, the open shield machine 1 is a shield machine with openings on the front, rear, and top, consisting of left and right side wall panels 1a, 1a and a bottom plate 1b that is approximately the same length as these side wall panels 1a, 1a and connects them.

[0004] The open shield machine 1 is divided in the front-to-back direction of the machine body by a partition wall 54, with the front part being the excavation section 52 where excavation is mainly performed and the rear part being the box installation section 53 where concrete boxes are lowered and installed.The box installation section 53 has shield jacks 55 on the left and right sides facing rearward on the front side, and is arranged in multiple tiers up and down.

[0005] Above the box installation section 53 of the open shield machine 1, a gantry crane 69 for lifting and lowering concrete boxes is erected, which consists of a frame 67 consisting of pillars 65 and beams 66 and a hoisting machine 68 such as a chain block that can move freely back and forth and left and right.

[0006] The mechanism for moving the hoisting machine 68 back and forth and left and right is a rail member 50 that the hoisting machine 68 moves on using self-propelled wheels or the like, which is hung across the width of the open shield machine 1 on the structure 67, and this rail member 50 can be moved using self-propelled wheels or the like using beam materials 66 provided in the front and rear directions of the open shield machine 1 on the structure 67 as rails.

[0007] The beams 66 extend forward and rearward, with the lifting section 56 protruding from the front of the open shield machine 1 and the concrete box lifting section 57 protruding from the rear. These lifting sections 56 and concrete box lifting section 57 are parts that allow the hoisting machine 68 to move in the front-to-rear direction. In the figure, 60 is a lifting jig for the concrete box 58.

[0008] There are four support columns 65, each of which is raised from the open shield machine 1 via a jack 72 so that the tilt can be corrected.

[0009] In this way, when the excavator excavates and removes earth and sand from the front or top surface of the excavation section 52 and the open shield machine 1 moves forward, the gantry crane 69 also moves.

[0010] The concrete box bodies 58 to be lifted and lowered are carried down to the concrete box lifting section 57 using a trolley 73 or the like, using the top surfaces of the existing concrete box bodies 58 lined up in a vertical row as an access road, and then lifted up using a hoist 68 and moved above the box body installation section 53 at the rear of the open shield machine 1, and then lifted and lowered into the box body installation section 53.

[0011] It can also be used during excavation; the hoisting machine 68 can be moved to the lifting section 56 protruding from the front of the open shield machine 1, a bucket or the like (not shown) can be hung from this hoisting machine 68, and the machine can be brought close to the excavation section 52, where the soil excavated by an excavator such as a backhoe can be received in the bucket or the like, and the bucket or the like can then be moved rearward and transferred to a dump truck or the like.

[0012] The open shield machine 1 moves forward while making corrections to its direction, pitching, and rolling. If the open shield machine 1 is tilted when lowering the concrete box 58, the gantry crane 69 will also be tilted. However, the four jacks 72 are extended and retracted as appropriate, and the gantry crane 69 is made horizontal while watching the inclinometer before work can begin.

[0013] Figure 18 shows an example of an open shield machine 1 equipped with a box body hoisting equipment 27 in place of the gantry crane 69. The upper ends of the four pillars 29 of the box body hoisting equipment 27 are located above the hoisting machine 34 and are fixed in place by rectangularly framed steel beams 31.

[0014] This prevents displacement of the support column spacing of the hoisting equipment 27 when the hoisting equipment 27 is in operation.

[0015] In the figure, reference numeral 34 denotes a winch that is suspended horizontally across two garter members 30 and can travel in the forward and backward directions, and the garter members 30 are attached to brackets 35 on the inside of the left and right support posts 29.

[0016] In the figure, 32 is a walkway, 33 is its handrail, and 36 is a ladder for climbing up and down. In addition, when the open shield machine 1 forms cutting edges at the tips of the side wall plates 1a and bottom plate 1b, these cutting edges are divided by the sliding retaining plate 16a. Summary of the Invention [Problem to be solved by the invention]

[0017] Depending on the construction conditions, there may be elevated structures with even stricter overhead restrictions, and the open shield machine 1 equipped with the conventional box body hoisting equipment 27 may not be able to perform construction underneath the elevated structures.

[0018] 18, the upper ends of the four pillars 29 of the box body hoisting equipment 27 are located above the hoisting machine 34 and are fixed with frame steel 31. This prevents displacement of the pillar spacing of the hoisting equipment 27 when the hoisting equipment 27 is in operation.

[0019] In the figure, reference numeral 34 denotes a hoist that is suspended horizontally across two garter members 30 and can travel in the forward and backward directions. The garter members 30 are attached at a position lower than the upper ends of the supports 29.

[0020] In addition, depending on the size and burial depth of the concrete box to be laid, it is necessary to ensure that the ground lifting height of the hoisting machine 34 is appropriate for those conditions, and there are cases where the ground height of the open shield machine equipped with the box hoisting equipment 27 cannot be reduced.

[0021] Furthermore, in places with narrower construction conditions where construction must be done within the construction width of the shield machine 1, it may not be possible to extend the walkway 32 for inspecting the hoisting machine 34, etc., to the left or right beyond the width of the open shield machine 1.

[0022] Although it depends on the construction conditions, excavation depth, etc., the construction width of the open shield machine 1 is the width of the open shield machine or the width + α (generally a minimum of about 10 to 20 cm).

[0023] The object of the present invention is to eliminate the above-mentioned inconveniences and to provide an open shield machine that enables box-hanging work by reducing the working lifting height by the amount of the upper beam members compared to conventional box-hanging equipment structures. [Means for solving the problem]

[0024] In order to achieve the above object, the present invention as described in claim 1 is characterized in that the body of the machine, consisting of left and right side wall panels and a bottom panel, is divided in the longitudinal direction into a front machine and a tail machine, and pillars are erected at the four corners of the upper end of the tail machine of the open shield machine to support a garter material on which a mobile facility equipped with a hoisting machine is horizontally suspended, and this garter material protrudes upward from a rectangular frame structure that binds the upper ends of the pillars together, thereby keeping the height of the pillars low.

[0025] According to the present invention described in claim 1, the girder material protrudes upward from the rectangular frame structure that restrains the upper ends of the pillars, thereby keeping the height of the pillars low, and compared to a normal box-hanging equipment structure, the working height is kept lower by the amount of the upper beam member, making it possible to perform the box-hanging work.

[0026] Since the garter material is directly attached to the upper end of each of the pillars, even when the box lifting equipment is lifting or running the flexible concrete box, only compressive or tensile loads act on the pillars from the upper end, which makes the structural design very safe.

[0027] The present invention described in claim 2 is characterized in that the body of the machine, consisting of left and right side wall panels and a bottom panel, is divided in the longitudinal direction into a front machine and a tail machine, and pillars are erected at the four corners of the upper end of the tail machine of the open shield machine to support a garter material on which a movable facility equipped with a hoisting machine is horizontally suspended, and this garter material is part of a rectangular frame structure that restrains the upper ends of the pillars, thereby keeping the height of the pillars low.

[0028] According to the present invention described in claim 2, the girder material is part of a rectangular frame structure that restrains the upper ends of the pillars, and by keeping the height of the pillars low, the working height can be kept lower by the amount of the upper beam member compared to a normal box-hanging equipment structure, making it possible to perform box-hanging work.

[0029] The present invention as set forth in claim 3 is characterized in that the walkway equipment is provided in a U-shape at the rear part of a rectangular frame structure that restrains the upper ends of the pillars.

[0030] According to the present invention as set forth in claim 3, the rectangular frame structure that binds the upper ends of the pillars together is located at a lower position than conventional structures, and therefore the walkway equipment can also be installed at a lower position.

[0031] The present invention as set forth in claim 4 is characterized in that the walkway equipment is provided in the space between the garter material and the rectangular frame structure that restrains the upper ends of the support posts.

[0032] According to the present invention described in claim 4, the walkway equipment consisting of the walkway, handrails, and walkway beams is installed inside each pillar without protruding outside, so that construction can be carried out even in places with narrower construction conditions where construction must be carried out within the construction width of the open shield machine 1.

[0033] Furthermore, the walkway is more securely fixed because both ends of the walkway beam are fixed to a frame made of girders and steel, making it a double-supported beam rather than a cantilevered beam. [Effects of the Invention]

[0034] As described above, the open shield machine of the present invention is an open shield machine equipped with box lifting equipment that is used for laying concrete boxes in narrow spaces with overhead restrictions, such as under overpasses, where cranes cannot be used, and can lower the height above ground while ensuring the specified ground lift height of the hoisting machine. [Brief explanation of the drawings]

[0035] [Figure 1] 1 is a plan view showing a first embodiment of the open shield machine of the present invention. FIG. [Figure 2] 1 is a plan view of a box body suspending equipment showing a first embodiment of an open shield machine of the present invention. [Figure 3] 1 is a side view showing a first embodiment of the open shield machine of the present invention. FIG. [Figure 4] FIG. 2 is a view taken along the line BB in FIG. [Figure 5] 1 is a perspective view showing a first embodiment of an open shield machine of the present invention. [Figure 6] FIG. 4 is a plan view showing a second embodiment of the open shield machine of the present invention. [Figure 7] FIG. 10 is a plan view of a box body suspending equipment showing a second embodiment of the open shield machine of the present invention. [Figure 8] FIG. 4 is a side view showing a second embodiment of the open shield machine of the present invention. [Figure 9] FIG. 9 is a view taken along the line BB in FIG. 8. [Figure 10] FIG. 2 is a perspective view showing a second embodiment of the open shield machine of the present invention. [Figure 11] FIG. 10 is a plan view showing a third embodiment of the open shield machine of the present invention. [Figure 12]FIG. 10 is a plan view of a box body suspending equipment showing a third embodiment of the open shield machine of the present invention. [Figure 13] FIG. 10 is a side view showing a third embodiment of the open shield machine of the present invention. [Figure 14] FIG. 14 is a view taken along the line BB in FIG. [Figure 15] FIG. 10 is a perspective view showing a third embodiment of the open shield machine of the present invention. [Figure 16] FIG. [Figure 17] FIG. [Figure 18] 10 is a perspective view showing another conventional example. DETAILED DESCRIPTION OF THE INVENTION

[0036] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings, in which: Fig. 1 is a plan view showing an embodiment of an open shield machine of the present invention; Fig. 5 is a perspective view of the same; and in the drawings, 1 is the open shield machine.

[0037] The open shield machine 1 is a shield machine with openings on the front, rear and top, consisting of left and right side wall plates 1a and a bottom plate 1b connected to these side wall plates 1a, and the machine body is divided in the front-to-rear direction into a front machine 17 and a tail machine 18, and the front end of the tail machine 18 fits into the rear end of the front machine 17, forming a bending part 38 at the mutual fitting part, making it bendable. A bending jack 20 is arranged in this bending part 38.

[0038] The front machine 17 mainly serves as the excavation section, and the tail machine 18 has the propulsion jack 3 arranged therein, forming a tail section 19 that serves as a section for hoisting and setting up the concrete box body 4 and the U-shaped box culvert.

[0039] In the figure, 16 is a slide jack for a slide retaining plate provided at the front end of the front machine 17, and 23 is a press bar (press angle) made of H-shaped steel or the like.

[0040] In the figure, reference numeral 27 denotes the box body lifting equipment, in which four pillars 29 are erected on both side panels 1a of the tail machine 18 of the open shield machine 1, two on each side, and brackets 35 are attached near the inner upper ends of the left and right pillars 29 so that the tops of the brackets 35 are at the same height as the tops of the pillars 29, and two running girder materials 30 are installed on top of each of them.

[0041] This garter material 30 suspends a hoisting equipment equipped with a hoist 34, allowing the hoisting equipment to travel in the forward and backward directions.

[0042] In addition, the garter material 30 protrudes upward from the rectangular frame structure made of steel material 31 that binds the upper ends of the support pillars 29 together, thereby reducing the height of the support pillars 29. In other words, each support pillar 29 is set short so that it is at the same height as the conventional ground lift 41 shown in Figure 18.

[0043] Since each pillar 29 is fixed and restrained at the head by the rectangular frame structure made of steel material 31, even when the concrete box 4 or U-shaped open channel is lifted by the hoist 34 and travels, the pillars 29 do not tilt and the pillars 29 do not move apart.

[0044] In addition, at the rear of the rectangular frame structure formed from the steel material 31, a walkway beam 37 is installed in a cantilever type on the L-shaped frame formed from the steel material 31, and an inspection walkway equipment consisting of a walkway 32 and handrails 33 is installed on the walkway beam 37.

[0045] Figures 6 to 10 show a second embodiment of the present invention, in which the box body lifting equipment 27 has four pillars 29 erected on the side plates 1a on both sides of the tail machine 18 of the open shield machine 1, two on each side, and garter material 30 is installed and fixed to the top ends of the two pillars 29 on each side, facing rearward with the front pillar 29 as the front end.

[0046] The garter material 30 is used in combination with the steel material 31 as part of a rectangular frame structure that restrains the upper ends of the pillars 29 together.

[0047] Steel members 30 installed at the rear and rear ends of the left and right garter members 30 are installed in a cantilevered manner on a walkway beam 37, and a U-shaped inspection walkway equipment consisting of a walkway 32 and handrails 33 is installed on the walkway beam 37.

[0048] 11 to 15 show a third embodiment of the present invention, in which the box body hoisting equipment 27 comprises four pillars 29, two on each side, erected on the side plates 1a on both sides of the tail machine 18 of the open shield machine 1, and the brackets 35 are attached to the inner upper ends of the left and right pillars 29 so that the tops of the brackets 35 are at the same height as the tops of the pillars 29, and so that walkway equipment consisting of a walkway beam 37, walkway 32, and handrails 33 can be installed between the garter material 30 to be installed and the pillars 29. Two running garter materials 30 are then installed on top of the brackets 35.

[0049] The inspection walkway equipment, consisting of a walkway 32 and handrails 33, is installed in the space between the garter material 30, which is a rectangular frame structure that restrains the upper ends of the pillars 29.

[0050] As in the second embodiment, the hoisting equipment equipped with the hoisting machine 34 is suspended horizontally between two garter members 30 and is capable of traveling in the forward and backward directions.

[0051] The length of each of the pillars 29 is set short so that the ground lift 41 of the hoisting machine 30 is the same height as the ground lift 41 shown in Figure 18, an oblique view of a conventional open shield machine equipped with box body lifting equipment 27.

[0052] As described above, a walkway facility consisting of a walkway beam 37, a walkway 32 and a handrail 33 is installed between the girder material 30 and the support pillar 29. Therefore, even in places with narrower construction conditions where construction must be done within the construction width of the open shield machine 1, construction is possible without extending the walkway facility consisting of the walkway 32 etc. for purposes such as inspecting the hoisting machine 34 outside the support pillar 29. [Explanation of symbols]

[0053] 1...Open shield machine 1a...Side wall plate 1b...Bottom plate 2...Cutting edge 3...Propulsion jack (shield jack) 4...Concrete box (or U-shaped concrete open channel) 16...Slide jack 16a...Slide retaining plate 17...Front machine 18...Tail machine 19...Tail section 20...Bending jack 23...Press bar (push angle) 24...Lifting machine 27...Box lifting equipment 29...Support column 30...Running girder material 31...Steel material 32...Corridor 33...Handrail 34... Hoisting machine 35... Bracket 36...Elevator equipment 37...Corridor beam 38...Bent section 41...Ground lifting height of hoist 50...rail member 52...excavation portion 53...Box installation part 54...Bulkhead 55...Shield jack 56...Lifting part 57... Concrete box lifting part 58... Concrete box 60... Hanging jig 65... Support 66...Tension material 67...Frame 68... Hoisting machine 69... Gantry crane 72...Jack 73...Cart

Claims

1. An open shield machine characterized in that the body of the machine, which consists of left and right side wall panels and a bottom panel, is divided in the front and rear directions into a front machine and a tail machine, and pillars are erected at the four corners of the upper end of the tail machine of the open shield machine to support a garter material on which a movable facility equipped with a hoisting machine is horizontally suspended, and this garter material protrudes upward from a rectangular frame structure that binds the upper ends of the pillars together, thereby keeping the height of the pillars low.

2. An open shield machine characterized by having a body consisting of left and right side wall panels and a bottom panel, divided into a front machine and a tail machine in the longitudinal direction, with pillars erected at the four corners of the upper end of the tail machine of the open shield machine to support a garter material on which a mobile facility equipped with a hoisting machine is horizontally suspended, and this garter material serves as part of a rectangular frame structure that restrains the upper ends of the pillars, thereby keeping the height of the pillars low.

3. 3. An open shield machine according to claim 1 or claim 2, wherein the walkway equipment is provided in a U-shape at the rear part of a rectangular frame structure that restrains the upper ends of the columns.

4. 2. An open shield machine according to claim 1, wherein the walkway facilities are provided in the space between the garter material and a rectangular frame structure that restrains the upper ends of the columns.

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