Tubing device

Abstract

To provide a tubing device comprising a lifting device cradle having a simple configuration and allowing a mounting position to be easily changed.SOLUTION: In a tubing device, at an upper part of a chuck frame 16, there are provided a work deck 29 comprising an opening 24 corresponding to a position of a casing insertion hole and a lifting device cradle 32 capable of being attached to and detached from a floor surface of the work deck. The work deck has a deck protrusion 31 protruding outward from the chuck frame. The lifting device cradle is selectively attached to two locations on the floor surface determined by rotating by 180 degrees around a central axis of the casing insertion hole as an axis of rotational symmetry, and in the attached state, has a cradle protrusion 33 protruding outward from the work deck and a stay member 34 detachably mounted between the cradle protrusion and the chuck frame. The stay member consists of an inner stay member 37 and an outer stay member 38 that are mechanically fastened to each other via a fixing portion 36 provided at an outer end of the deck protrusion.SELECTED DRAWING: Figure 4

Description

Technical Field

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[0001] The present invention relates to a tubing device, and more particularly to a tubing device for driving and extracting a casing into the ground in foundation work for construction and civil engineering.

Background Art

[0002] Generally, a tubing device used in foundation work has a work deck provided on the upper surface of the device body. The work deck is used as a scaffold for inserting, adding, and injecting cement milk into a casing tube (steel pipe pile), and can be made to accommodate large-diameter casing tubes by providing an extended deck that projects outward (see, for example, Patent Document 1). <​​​​​​​​​​​​​​​​​​​​​​​​​​​​In low-ceiling and confined spaces, it is difficult for large cranes and aerial work platforms to enter, so the tubing device described in Patent Document 2 requires a power device (such as a backhoe, auxiliary crane, or lifting device) for towing the main unit and for auxiliary work. However, as can be seen in Figure 9, mounting the lifting device (aerial work platform) 101 on the main unit 100, which is designed to be lightweight and compact, is a large undertaking, and the rigidity of the frame (support structure) 102 is also required. Therefore, as shown by comparing both Figure 9(a) and Figure 9(b), when the lifting device 101 is moved to the opposite side of the work deck 103, there is a problem in that the disassembly and assembly work of the frame 102 becomes burdensome.

[0006] Therefore, the present invention aims to provide a tubing device equipped with a lifting device frame that allows for easy modification of the mounting position with a simple configuration. [Means for solving the problem]

[0007] To achieve the above objective, the tubing apparatus of the present invention comprises a base frame, a drive frame mounted above the base frame so as to be movable up and down via a lifting cylinder, a chuck frame mounted above the drive frame so as to be movable up and down via a chuck cylinder, and a casing insertion hole that penetrates vertically through the central portions of the base frame, drive frame, and chuck frame, and a work deck with an opening corresponding to the position of the casing insertion hole and a lifting device stand that can be attached to the floor surface of the work deck are provided on the upper part of the chuck frame. In the lifting device, the work deck has a deck overhang that extends outward from the chuck frame, and the lifting device stand is selectively attached to two locations on the floor surface determined by rotating the central axis of the casing insertion hole 180 degrees around the axis of rotational symmetry, and in this attached state, it has a stand overhang that extends outward from the work deck and a stay member that is detachably straddled between the stand overhang and the chuck frame, and the stay member is characterized in that it consists of an inner stay member and an outer stay member that are mechanically fastened to each other via a fixing part provided at the outer end of the deck overhang.

[0008] Furthermore, the stay member has an upward slope from the chuck frame side to the overhanging part of the frame, the inner stay member is fastened to the chuck frame by horizontal bolts and to the fixing part by vertical bolts, and the outer stay member is fastened to the fixing part by horizontal bolts and to the overhanging part of the frame by vertical bolts.

[0009] Furthermore, the lifting device frame is characterized by having a base plate that rests on the floor surface of the work deck and side plates that rise from the edge of the base plate, with the side plates having suspension holes. [Effects of the Invention]

[0010] According to the tubing device of the present invention, the lifting device frame, which is detachably mounted on the work deck, has a frame overhang that extends outward from the work deck when mounted, and a stay member that is detachably straddled between the frame overhang and the chuck frame. This stay member consists of an inner stay member and an outer stay member that are mechanically fastened (e.g., bolted) to each other via a fixing part provided at the outer end of the deck overhang. Therefore, when attaching or detaching the lifting device frame, only the outer member needs to be disassembled and assembled, eliminating the need for awkward work in hard-to-reach places and improving work efficiency. As a result, even when relocating the lifting device to the opposite side of the work deck, the disassembly and assembly of the frame can be easily performed. In particular, since the inner and outer stay members are integrally fastened together with a fixing part, a highly rigid support structure suitable for the operation of the lifting device is obtained, resulting in a safe and highly workable lifting device frame. [Brief explanation of the drawing]

[0011] [Figure 1] This is a front view of a tubing device showing one embodiment of the present invention. [Figure 2] This is also a side view. [Figure 3] This is also a plan view. [Figure 4] This is a cross-sectional view taken along line IV-IV in Figure 3. [Figure 5] This is a plan view showing the lifting device frame with its mounting position changed to the opposite side of the work deck. [Figure 6] This is an overall perspective view from above of the work deck with the lifting device mounting frame attached. [Figure 7] This is a perspective view of the main parts of the work deck, with the lifting device frame attached, seen from below. [Figure 8] This is an overall perspective view from below of the work deck with the lifting device mounting frame attached. [Figure 9] This figure shows the usage state of a conventional tubing device. [Modes for carrying out the invention]

[0012] Figures 1 to 8 show an example of one embodiment of the tubing device of the present invention. As shown in Figures 1 to 6, the tubing device 11 in this embodiment comprises a base frame 12, a drive frame 14 mounted above the base frame 12 so as to be able to move up and down via four lifting cylinders 13, and a chuck frame 16 mounted above the drive frame 14 so as to be able to move up and down via four chuck cylinders 15. Casing insertion holes 17 are provided in the central parts of the base frame 12, drive frame 14, and chuck frame 16, penetrating vertically and arranged coaxially.

[0013] The drive frame 14 is provided with a hydraulic motor 18 and a reduction gear 19, which are rotation transmission mechanisms, and a cone bearing 20 surrounding the casing insertion hole 17. The cone bearing 20 forms a chuck mechanism in conjunction with a plurality of main chucks 21 that grip a cylindrical casing (not shown). It is rotatably mounted on the drive frame 14, and the rotation of the hydraulic motor 18 is transmitted via the reduction gear 19. In addition, a tapered surface is formed on the inner circumference of the cone bearing 20 so as to be able to contact the wedge shape of the main chuck 21.

[0014] The main chuck 21 is provided at equal intervals in the circumferential direction of the casing insertion hole 17 in the chuck frame 16. Specifically, it is suspended from the chuck frame 16 via a link 22 and a chuck bearing 23, and the main chuck 21 moves relatively up and down by expanding and contracting the chuck cylinder 15. As a result, the main chuck 21 is inserted between the casing and the cone bearing 20, or withdrawn, to grip and release the casing.

[0015] On the upper surface of the chuck frame 16, a work deck 25 having an opening 24 corresponding to the position of the casing insertion hole 17 is provided, and ladders 26 installed at two opposite side surfaces are used for getting on and off the work deck 25.

[0016] The work deck 25 has a floor surface (scaffold) that is substantially rectangular in plan view and on which an operator can walk, and a plurality of handrails 27 are installed at the outer edge to prevent falls. Also, from the viewpoints of assembly and maintenance, split work decks 29, 29 that are detachable separately from the work deck body 28 are provided on both longitudinal sides sandwiching the casing insertion hole 17. The split work deck 29 is a floor board having reinforcement in a substantially rectangular shape in plan view, and is bolted to the mounting seat on the chuck frame 16. The mounting seat is a tap block 30 provided at a plurality of locations (in this exemplary embodiment, three locations in a set, including one location at the center in the width direction parallel to the short side of the work deck 25 near the casing insertion hole 17 and one location near the casing insertion hole 17 at the inner ends of both work deck bodies 28, for a total of two sets of six locations) near the casing insertion hole 17, and a plurality of screw holes (tap holes) are arranged in alignment along the longitudinal direction on the upper surface side of each tap block 30.

[0017] As shown in FIG. 4, the dividing work deck 29 has a deck overhang portion 31 that protrudes outward from the chuck frame 16 by a predetermined amount (dimension L1) in a state of being bolted to the upper surface 16a of the chuck frame 16, and the height position of the lower end 29a obtained by bending the outer end downward is slightly lower than the upper surface 16a of the chuck frame 16. Further, on the floor surface of the dividing work deck 29, an elevating device mounting base 32 is attached as a base for installing an elevating device (for example, an aerial work platform of the 10 m class).

[0018] The elevating device mounting base 32 has a substantially rectangular bottom plate 32a placed on the floor surface of the dividing work deck 29 and side plates 32b rising from the edge portions around the four sides of the bottom plate 32a. In other words, it is a tray-shaped object with a flat bottom overall. Further, the mounting base 32 is selectively attached to one side (FIG. 3) and the opposite side (FIG. 5) in the longitudinal direction of the work deck 25 at two locations on the floor surface determined by rotating 180 degrees with the central axis C of the casing insertion hole 17 as the rotation symmetry axis, that is, at positions corresponding to the tap block 30. And in the attached state, as shown in FIG. 4, it has a mounting base overhang portion 33 that protrudes outward from the dividing work deck 29 by a predetermined amount (dimension L2) and a stay member 34 detachably straddled between the mounting base overhang portion 33 and the chuck frame 16.

[0019] Here, paying attention to the overhang amount of each part, the overhang amount (dimension L2) of the elevating device mounting base 32 with respect to the dividing work deck 29 is about 1 / 2 of the length dimension (total length) from the inner end to the outer end of the bottom plate 32a, and is set to about twice the overhang amount (dimension L1) of the dividing work deck 29 with respect to the chuck frame 16. Therefore, when an elevating device is installed on the mounting base 32, the center of gravity of the main body is located outside the chuck frame 16. And the load (W) that causes a bending moment (M) due to the installation of the elevating device acts on each cross section of the deck overhang portion 31 and the mounting base overhang portion 33 at the same time.

[0020] The bottom plate 32a is mainly provided with multiple bolt holes (not shown) corresponding to multiple screw holes in the tap block 30, and multiple relief holes 32c to avoid the mounting bolts 35 for the divided work deck 29 (Figure 4). As a result, the lifting device frame 32 shares the tap block 30 with the divided work deck 29 and is bolted together with the two in an overlapping manner, but it can be removed independently without being bolted together with the divided work deck 29. When the lifting device frame 32 is lifted using an auxiliary crane, the four lifting holes 32d provided in the side plate 32b are used.

[0021] As can be seen in Figure 4, the stay member 34 has an upward slope from the chuck frame 16 side to the support extension 33 side, and consists of an inner stay member 37 and an outer stay member 38 that are mechanically fastened to each other with bolts and nuts via a fixing part 36 provided at the center in the width direction of the outer end (bent plate) of the deck extension 31. As shown in Figure 7, the fixing part 36 consists of a U-shaped bracket 36a with an open bottom and a flange plate 36b provided at the outer end of the bracket 36a.

[0022] The inner and outer stay members 37 and 38 preferably have common cross-sectional properties against longitudinal bending forces. For example, flat bars 37b and 38b are fixed to the inner longitudinal ends of the two angles 37a and 38a, and angles 37c and 38c are fixed to the outer ends, so that bolt fastening parts (bolt holes) are provided at both longitudinal ends of the two angles 37a and 38a. Here, the inner stay member 37 is arranged with ease of assembly in mind, with one rib of the two angles 37a and 37a facing back to back with an extremely narrow spacing, and the other ribs facing outwards from each other, approximately parallel to each other. As can be seen in Figure 2, it is positioned to pass through the gap between the two hydraulic motors 18 and 18 so as not to interfere with them when installed.

[0023] When attaching the inner stay member 37, the plate surface of the bracket 16b (with a back nut structure) and the plate surface of the flat bar 37b are in surface contact with the bracket 16b provided on the side of the chuck frame 16, and are fastened with two horizontal bolts 39, 39. On the other hand, when attaching to the fixing part 36, the lower surface of the bracket 36a and the upper surface of the angle 37c are in surface contact, and are fastened with two vertical bolts 40, 40 and nuts 41, 41.

[0024] When attaching the outer stay member 38, the plate surface of the flange plate 36b (with a back nut structure) and the plate surface of the flat bar 38b are in surface contact with the fixing part 36, and are fastened with two horizontal bolts 42, 42. On the other hand, when attaching to the frame overhang 33, the lower surface of the bottom plate 32a of the lifting device frame 32 and the upper surface of the angle 38c are in surface contact, and are fastened with two vertical bolts 43, 43 and nuts 44, 44.

[0025] As shown in Figure 8, the lifting device frame 32, configured in this way, is supported by an outer stay member 38 on one side, with inner stay members 37, 37 attached to both of the two deck overhangs 31, 31 during operation. For example, when moving the tubing device 11 to perform construction close to an existing structure (see Figure 9(b) in the conventional explanation), the position of the lifting device frame 32 is changed from one side of the work deck 25 (Figure 3) to the opposite side (Figure 5). The specific procedure is as follows: First, the outer stay member 38 is removed and temporarily attached to the fixing part 36 on the opposite side with bolts 42, 42. Next, after releasing the bolts on the work deck 29 to the lifting device frame 32, it is moved to the opposite side by the lifting operation of the auxiliary crane. Then, the work is completed by adjusting the mounting position of the frame 32 to the work deck 29 and the outer stay member 38 and fastening the necessary bolts. This frees up the space (overhang portion 33) where the lifting device frame 32 protruded, allowing the tubing device 11 to be installed closer to the existing structure.

[0026] As described above, the tubing device 11 of the present invention has a lifting device frame 32 that is detachably mounted on the work deck 25, which has a frame overhang portion 33 that extends outward from the work deck 25 when mounted, and a stay member 34 that is detachably straddled between the frame overhang portion 33 and the chuck frame 16. Since the stay member 34 consists of an inner stay member 37 and an outer stay member 38 that are mechanically fastened (for example, bolted) to each other via a fixing portion 36 provided at the outer end of the deck overhang portion 31, the disassembly and assembly of the stay member 34 required when attaching and detaching the lifting device frame 32 only needs to be done on the outer member 38, thus eliminating the need for awkward work in recessed positions and improving work efficiency. As a result, even when the lifting device is moved to the opposite side of the work deck 25, the disassembly and assembly of the frame 32 can be easily performed. In particular, since the inner and outer stay members 37 and 38 are integrally fastened together by the fixing part 36, a highly rigid support structure suitable for the operation of the lifting device is obtained, resulting in a safe and easy-to-work-with lifting device frame 32.

[0027] Furthermore, the stay member 34 has an upward slope from the chuck frame 16 side to the frame extension 33 side, and the outer stay member 38 is fastened with horizontal bolts 42 to the fixing part 36 and with vertical bolts 43 to the frame extension 33. Therefore, when tightening the horizontal bolts 42, the work can be easily done using manual tools such as a spanner or ratchet wrench. On the other hand, when tightening the vertical bolts 43, the work can be done in front of (outside of) the fixing part 36, and since horizontal assembly errors of the lifting device frame 32 can be easily absorbed by the bolt holes, workability is also good. Moreover, since the inner stay member 37 is fastened with horizontal bolts 39 to the chuck frame 16 and with vertical bolts 40 to the fixing part 36, the same effect as when handling the outer stay member 38 can be obtained when disassembly is required, and an even more significant effect can be obtained in the inner position where work is often constrained by space.

[0028] In addition, since suspension holes 32d are provided in the side plate 32b of the lifting device frame 32, the suspension function can be satisfied without hindering the installation of the lifting device or the disassembly and assembly of the frame 32. In other words, in conjunction with improved disassembly and assembly capabilities, a lifting device frame 32 is achieved that can meet on-site needs that prioritize safety and efficient work.

[0029] It should be noted that the present invention is not limited to the above-described embodiments, and the configuration and arrangement of the lifting device frame can be appropriately changed depending on the specifications of the tubing device. Also, although the work deck is configured to be separable in the embodiments, it can also be applied to a work deck with a single integrated structure. Furthermore, the stay members only need to have a fixed part that can be mechanically fastened (bolt fastening, pin fastening, etc.), and the size and shape of the components are arbitrary. For example, by combining angles and flat bars as in the embodiments, a strong and robust stay member (support structure) can be obtained inexpensively, and since only the lightweight half can be handled when disassembling, it also contributes to reducing the workload. [Explanation of Symbols]

[0030] 11...Tubing device, 12...Base frame, 13...Lifting cylinder, 14...Drive frame, 15...Chuck cylinder, 16...Chuck frame, 16a...Top surface, 16b...Bracket, 17...Casing insertion hole, 18...Hydraulic motor, 19...Gear reducer, 20...Cone bearing, 21...Main chuck, 22...Link, 23...Chuck bearing, 24...Opening, 25...Work deck, 26...Ladder, 27...Handrail, 28...Work deck body, 29...Divided work deck, 29a...Lower end, 30...Tap block 31... Deck overhang, 32... Lifting device frame, 32a... Bottom plate, 32b... Side plate, 32c... Relief hole, 32d... Hanging hole, 33... Frame overhang, 34... Stay member, 35... Bolt, 36... Fixing part, 36a... Bracket, 36b... Flange plate, 37... Inner stay member, 37a... Angle, 37b... Flat bar, 37c... Angle, 38... Outer stay member, 38a... Angle, 38b... Flat bar, 38c... Angle, 39... Bolt, 40... Bolt, 41... Nut, 42... Bolt, 43... Bolt, 44... Nut

Claims

1. The system comprises a base frame, a drive frame mounted above the base frame so as to be movable up and down via a lifting cylinder, a chuck frame mounted above the drive frame so as to be movable up and down via a chuck cylinder, and a casing insertion hole that penetrates vertically through the central portion of the base frame, drive frame, and chuck frame. In a tubing device, the upper part of the chuck frame is provided with a work deck having an opening corresponding to the position of the casing insertion hole, and a lifting device stand that can be attached to the floor surface of the work deck, The work deck has a deck overhang that extends outward from the chuck frame, The lifting device frame is selectively mounted on two locations on the floor surface determined by rotating the central axis of the casing insertion hole 180 degrees around the axis of rotational symmetry, and in this mounted state, it has a frame extension portion that extends outward from the work deck, and a stay member that is detachably straddled between the frame extension portion and the chuck frame. The tubing device is characterized in that the stay member consists of an inner stay member and an outer stay member that are mechanically fastened to each other via a fixing portion provided at the outer end of the deck overhang.

2. The stay member has an inclination that increases from the chuck frame side towards the overhanging part of the mounting base, The inner stay member is fastened to the chuck frame by horizontal bolts and to the fixing portion by vertical bolts. The tubing device according to claim 1, characterized in that the outer stay member is fastened with the fixing portion by a horizontal bolt and with the mounting bracket extension portion by a vertical bolt.

3. The lifting device frame has a base plate that is placed on the floor surface of the work deck and side plates that rise from the edge of the base plate. The tubing device according to claim 1 or 2, characterized in that the side plate is provided with a suspension hole.

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