JP7494103B2 - Tubing Equipment - Google Patents

Description

The present invention relates to a tubing device, and more specifically to a tubing device used to press and pull piles into and out of the ground during foundation work in architecture and civil engineering.

Tubing equipment used in foundation construction generally comprises a base frame that is installed on the ground, a drive frame that is mounted above the base frame and can be raised and lowered via four lifting cylinders, a chuck frame that is mounted above the drive frame and can be raised and lowered via four chuck cylinders, and a casing tube insertion hole that penetrates the center of each frame. In such tubing equipment, a work deck is provided on the upper surface of the tubing equipment body as a foothold when performing tasks such as inserting and removing the casing tube and pouring concrete (see, for example, Patent Document 1).

JP 2015-40434 A

In recent years, as the sites where tubing equipment is used have become more diverse, for example, when transporting to a narrow site, it is becoming more common to remove the work deck from the main body in advance and move it after making it into a shape (lightweight) that matches the lifting capacity of the crane. However, although the work deck is bolted to the main body, once it is removed, it must be repositioned in order to be reattached, making installation difficult at sites where speed is required. In addition, since the work deck weighs several tons, even the slightest misalignment between the lifting point and the center of gravity can cause the work deck to sway sideways when lifting begins, risking damage to various parts, and removal work must also be done with great care.

The present invention aims to provide a tubing device equipped with a deck attachment/detachment guide that allows easy and safe disconnection and connection between the main body and the work deck.

In order to achieve the above object, the tubing device of the present invention comprises a base frame that is installed on the ground, a drive frame that is provided above the base frame so as to be able to rise and fall via a lifting cylinder, a chuck frame that is provided above the drive frame so as to be able to rise and fall via a chuck cylinder, and a casing insertion hole that passes vertically through the center of the base frame, the drive frame, and the chuck frame. A work deck that has an opening corresponding to the position of the casing insertion hole and can be attached and detached by a hanging operation is provided on the chuck frame. The tubing device is characterized in that it comprises a deck attachment/detachment guide that engages parts of the work deck and the chuck frame with each other as the work deck moves downward, and the deck attachment/detachment guide is composed of a frame side guide member provided on one side of the chuck frame and a deck side guide member provided on the underside of the work deck and can be engaged with each of the frame side guide member and the chuck frame.

The deck-side guide member and the frame-side guide member are characterized in that at least one of the guide members on one side is made up of a plurality of guide members arranged independently of each other, and the guide members on the other side are arranged between the plurality of guide members, and the plurality of guide members are made up of a total of four guide members, two of which are arranged on either side of an imaginary plane that passes through the central axis of the casing insertion hole and is parallel to the width of the device, and two of which are paired with the two and arranged at a position rotated 180 degrees around the central axis of the casing insertion hole as an axis of rotational symmetry.

The deck-side guide member is characterized in that it has an inclined portion that causes the deck-side guide member or the chuck frame to slide away from each other when they come into contact with each other, and that the deck-side guide member is fixed to the work deck by bolt fastening. The frame-side guide member is also characterized in that it has an attachment portion to which the work deck can be detachably attached.

The tubing device of the present invention is equipped with a deck attachment/detachment guide that engages the deck-side and frame-side guide members as the work deck moves downward, so when attaching the work deck, the attachment position of the work deck can be determined simply by lowering the crane using the positions of the guide members as indicators. On the other hand, when removing the work deck, the lateral movement of the work deck is restricted up to a specified height at which the engagement between the guide members is released, eliminating the risk of damaging each part of the tubing device due to careless lifting operations. In addition, since the frame-side guide member is located on one side of the chuck frame and the deck-side guide member is located on the underside of the work deck, the relative positions of the guide members can be easily confirmed from the ground, which contributes to safety and work efficiency at sites where the tubing device is used.

1 is a front view of a tubing device showing one embodiment of the present invention. FIG. Side view FIG. 5 is a view taken along the line VV in FIG. 4. FIG. This is also a front view. This is also a side view. FIG. 1 is a diagram showing a suspended state of the work deck. FIG. 4 is a diagram showing the installation state of the work deck.

Figures 1 to 10 show an example of the tubing device of the present invention. As shown in Figures 1 to 3, the tubing device 11 shown in this example comprises a base frame 12 that is installed on the ground, a drive frame 14 that is arranged above the base frame 12 so that it can be raised and lowered via four lifting cylinders 13, and a chuck frame 16 that is arranged above the drive frame 14 so that it can be raised and lowered via four chuck cylinders 15. A casing insertion hole 17 that penetrates vertically and is arranged coaxially is provided in the center of the base frame 12, drive frame 14, and chuck frame 16.

The drive frame 14 is provided with a hydraulic motor 18 and a reducer 19, which are rotation transmission mechanisms, and a cone bearing 20 that surrounds the casing insertion hole 17. The cone bearing 20 forms a chuck mechanism in pairs with a number of main chucks 21 that grip a cylindrical casing (not shown), and is rotatably attached to the drive frame 14, with the rotation of the hydraulic motor 18 being transmitted via the reducer 19. The inner periphery of the cone bearing 20 is formed with a tapered surface that can come into contact with the wedge-shaped main chuck 21.

The main chucks 21 are provided at equal intervals in the circumferential direction of the casing insertion hole 17 in the chuck frame 16. Specifically, they are suspended from the chuck frame 16 via links 22 and chuck bearings 23, and the main chuck 21 moves up and down relative to the chuck frame 16 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 pulled out to grip and release the casing.

A work deck 25 with an opening 24 corresponding to the position of the casing insertion hole 17 is provided on the upper surface of the chuck frame 16, and ladders 26 installed in two locations on the opposing sides are used to get on and off the work deck 25.

The work deck 25 is equipped with a roughly rectangular platform in plan view on which workers can walk, and can be attached to and detached from the chuck frame 16 by the lifting action of the crane, i.e., by moving up and down. This platform is formed with a central deck section 27 with an opening 24, which is stepped and lower than both sides, and when the work deck 25 is installed, the central deck section 27, which is a part of the platform, is disposed in a manner that it is submerged between various hydraulic components including the lifting cylinder 13. In addition, multiple handrails 28 are installed on the outer edge of the work deck 25 to prevent falls from the platform, and if necessary, the handrails 28 of the central deck section 27 can be removed to ensure a working space for hoisting the casing even at sites with height restrictions. In other words, the platform functions as a tubing device with low headroom specifications.

When the tubing device 11 configured in this way is transported in and out, the entire machine is lifted using the four lifting ears 29 provided on the top surface of the chuck frame 16. However, in narrow sites where large cranes cannot enter, the work deck 25 is removed from the chuck frame 16 in advance to reduce weight to match the lifting capacity of the crane being used. When removing the work deck 25, four lifting fittings (shackles) 30 provided on the top surface of the central deck section 27 are used.

Although the work deck 25 is bolted to the chuck frame 16, the bolt holes are located relatively high and difficult to see from the ground, so it takes a considerable amount of time to separate the work deck 25 and complete its reassembly. In addition, if shaking or rotation occurs when lifting begins, there is a risk of damaging the lift cylinder 13 and other parts. Therefore, the tubing device 11 is provided with a deck attachment/detachment guide 31 that allows the chuck frame 16 and the work deck 25 to be easily and safely disconnected and connected.

The deck attachment/detachment guides 31 have a bracket structure that engages parts of the work deck 25 and the chuck frame 16 with each other as the work deck 25 moves downward. As shown by the imaginary lines in Figures 1 and 2, there are four of them in total, two on each side in the width direction (vertical direction in Figure 2) with the casing insertion hole 17 or opening 24 between them.

As shown in Figures 4 and 5, this bracket structure is composed of a frame-side guide member 32 provided on one side of the chuck frame 16, and a deck-side guide member 33 provided on the underside of the work deck 25 and capable of engaging with the frame-side guide member 32 and the chuck frame 16. Each guide member 32, 33 is disposed inside the frame body 27a that forms the side portion of the central deck section 27, and is not normally visible from the outside (Figure 1). However, in a suspended state where the work deck 25 is separated from the upper position, as shown in Figure 9, they are disposed in a vertical positional relationship that allows them to be simultaneously seen from the ground, and serve as a mark for aligning the work deck 25 and the chuck frame 16.

The specific configurations and functions of the frame side guide member 32 and the deck side guide member 33 are described below with reference to Figures 4 to 10.

As shown in Figures 6 to 8, the frame side guide members 32 are four identically shaped members arranged independently of one another, with two of them arranged at equal intervals on either side (left-right direction in Figure 6) of an imaginary plane parallel to the width direction (up-down direction in Figure 6) passing through the central axis C of the casing insertion hole 17, and the two pairs of these are each arranged rotated 180 degrees with the central axis C of the casing insertion hole 17 as the axis of rotational symmetry.

As shown in Figures 4 and 5, each frame side guide member 32 has a roughly U-shaped cross section consisting of a flat portion 32a against which the scaffolding board 27b of the central deck section 27 can abut, and a pair of legs 32b, 32b. As also shown in Figure 6, the legs 32b, 32b on the base end side in the length direction are fixed to the upper surface of the chuck frame 16, and the tip side protrudes from the side end portion 16a of the chuck frame 16 to an extent that fits within the width dimension W of the frame body 27a of the central deck section 27.

As a result, the central deck section 27 of the work deck 25 is supported by the four frame-side guide members 32, and in this state, the mounting section (back nut) 32c of the frame-side guide members 32 is screwed into the mounting bolt 34 inserted into the bolt hole of the scaffolding board 27b, and the central deck section 27 is fixed onto the chuck frame 16. At this time, a pair of front and rear stay members 35 (opposite side not shown) are bolted to the mounting section 16b provided on the central front and rear faces (left and right side faces in FIG. 6) of the chuck frame 16 as shown in FIG. 3, and the front and rear parts of the work deck 25 are stably supported, respectively.

The deck side guide members 33 correspond to each of the frame side guide members 32, and although there are slight differences in shape and dimensions due to conditions such as the mounting direction, there are four of them that are almost identical in shape. Two of these on one side are arranged between the frame side guide members 32, 32, and are arranged at equal intervals on both sides (left and right in Figure 2) of an imaginary plane in the width direction (up and down in Figure 2) that passes through the central axis C of the casing insertion hole 17, and the two that are paired with these are each arranged rotated 180 degrees with the central axis C of the casing insertion hole 17 as the axis of rotational symmetry.

As shown in Figs. 4 and 5, each deck-side guide member 33 is a removable part consisting of a fixed plate 33a fixed to the underside of the scaffolding board 27b with two mounting bolts 36, and two abutment plates 33b, 33b assembled in an approximately T-shape on the plate surface of the fixed plate 33a. The fixed plate 33a is an approximately rectangular plate body and is equipped with a back nut 33c corresponding to the position of the bolt hole. Each abutment plate 33b, 33b has a height (length) dimension limited in consideration of the fact that the work deck 25 is placed directly on the ground, but it is ensured to be at least twice the height dimension of the frame-side guide member 32. However, in this embodiment, as can be seen from Fig. 9, only one of the two deck-side guide members 33 on one side protrudes from the lower end position of the frame body 27a of the central deck section 27 to the extent that it does not interfere with handling. This makes it easier for the worker to identify the position of the deck-side guide member 33 in the suspended state.

The positional relationship between each of the abutment plates 33b, 33b and both mounting bolts 36, 36 is determined in such a way as to suppress the rotational moment caused by abutment with the deck side guide member 33 or the chuck frame 16, and when the plates are bolted to the scaffolding board 27b, the ends of these plates are arranged facing each other with a predetermined gap (e.g., 3 mm) between the leg 32b of the frame side guide member 32 and the side end 16a of the chuck frame 16. Furthermore, the lower ends of each of the abutment plates 33b, 33b are chamfered by removing the corners in a long, linear manner in the vertical direction to form inclined parts 33d, 33d that slide in directions away from each other when they abut in relation to the frame side guide member 32 or the chuck frame 16.

When attaching the work deck 25 to the main body using the deck attachment/detachment guide 31 configured in this way, as shown in FIG. 9, the work deck 25 is moved above the chuck frame 16 by the crane's lifting operation according to the signal of the worker on the ground, and the position in the front, rear, left and right directions is adjusted, and then the work deck 25 is lowered. Here, the worker instructs the crane operator to perform the lowering operation from a position where the two deck side guide members 33 on one side of the work deck 25 and the two corresponding frame side guide members 32, 32 can be simultaneously seen. Then, when the deck side guide members 33, 33 reach an aligned state just before they enter between the frame side guide members 32, 32, the worker can focus only on the movement of the deck side guide member 33 on one side (the left side in FIG. 9), whose position can be identified from the height of the eye line.

If the bolt holes of the mounting bolts 34 are misaligned, the inclined portion 33d of the abutment plate 33b of the deck side guide member 33 moving downward in any of the four deck attachment/detachment guides 31 abuts against the corners (bend R portion) of the frame side guide member 32 or the corners (plate ends) of the chuck frame 16, and slides away from each other (front/back/left/right directions). As a result, the frame side guide member 32 and the deck side guide member 33 are held in an engaged state. Then, by slightly moving the work deck 25 while keeping the suspension rope in a taut state, the bolt holes of each mounting bolt 34 are aligned. After the work deck 25 is mounted on the chuck frame 16 in this way, the front and rear stay members 35 are attached, and as shown in FIG. 10, all the mounting bolts 34 are tightened with a predetermined torque to complete the installation work of the work deck 25.

In this way, according to the tubing device 11 of the present invention, the deck attachment/detachment guide 31 is provided to engage the deck side and frame side guide members 32, 33 with each other as the work deck 25 moves downward. Therefore, when attaching the work deck 25, the attachment position of the work deck 25 can be determined simply by lowering the crane using the positions of the guide members 32, 33 as indicators. On the other hand, when removing the work deck 25, the lateral movement of the work deck 25 is restricted up to a predetermined height at which the engagement state of the guide members 32, 33 is released, so there is no risk of damaging each part of the tubing device 11 due to careless lifting operations. In addition, since the frame side guide member 32 is disposed on one side of the chuck frame 16 and the deck side guide member 33 is disposed on the underside of the work deck 25, the positional relationship of the guide members 32, 33 can be easily confirmed from the ground, which contributes to safety and work efficiency at the site where the tubing device 11 is used.

In addition, the deck side guide member 33 and the frame side guide member 32 are made up of four guide members arranged independently of each other, and the two deck side guide members 33, 33 on each side are arranged between the frame side guide members 32, 32, so that movement of the work deck 25 in the front-rear and left-right directions can be effectively restricted. Furthermore, the four deck side guide members 33 and the frame side guide members 32 are made up of two members arranged on either side of an imaginary plane passing through the central axis C of the casing insertion hole 17, and two members that are paired with these and arranged with the central axis C of the casing insertion hole 17 as the axis of rotational symmetry, so that movement of the work deck 25 in the rotational direction can also be effectively restricted.

In addition, the deck side guide member 33 has an inclined portion 33d that causes the deck side guide member 33 to slide away from the frame side guide member 32 or the chuck frame 16 when they come into contact. This makes it possible to guide the two guide members 32, 33 in a direction that aligns the bolt holes of the mounting bolts 34 when they come into contact with each other. Even if the positioning accuracy of the crane operation is somewhat low, any misalignment in the positional relationship of the guide members 32, 33 can be easily corrected.

In addition, because the deck side guide member 33 is fixed to the work deck 25 by the mounting bolts 36, the gap can be easily adjusted in relation to the frame side guide member 32 and the chuck frame 16, and assembly is also easy. Furthermore, because the frame side guide member 32 is provided with a mounting portion (back nut) 32c to which the work deck 25 is attached, the shape of the deck attachment/detachment guide 31 can be optimized, including the fixing of the work deck 25, and the position of the work deck 25 can be neatly aligned to the chuck frame 16 while demonstrating high positioning accuracy.

In addition, by utilizing the space provided by the difference in width between the work deck 25 and the chuck frame 16, each guide member 32, 33 is located inside the frame body 27a of the central deck section 27, so there is an advantage that the deck attachment/detachment guide 31 does not appear on the outside of the tubing device 11 and does not impair the appearance. On the other hand, when the work deck 25 is suspended, they are provided in a vertical positional relationship that allows them to be simultaneously seen from the ground, and furthermore, two on each side are provided in a relatively narrow range (span) corresponding to the central deck section 27, so there is no need to move your line of sight significantly when positioning, and they can be effectively used as markers for aligning the work deck 25 and the chuck frame 16.

In addition, only one of the two deck side guide members 33 on each side protrudes from the lower end position of the frame body 27a of the central deck section 27, making it easy to identify the position of the deck side guide member 33 even when the work deck 25 has been lowered to eye level. Furthermore, by setting the shapes at different heights, the deck side guide members 33, 33 can easily fit between the frame side guide members 32, 32, which contributes to improving the positioning accuracy of the work deck 25.

The present invention is not limited to the above-mentioned embodiment, and the deck attachment/detachment guide may have any shape, number, and arrangement as long as it has a bracket structure that engages parts of the work deck and the chuck frame. For example, the deck side guide member and the frame side guide member may be interchanged, or the one placed between the guide members may be configured as an integrated part. The deck attachment/detachment guide may be colored differently from the paint color of the machine body, so that it stands out only when the work deck is being attached. Furthermore, the specifications of the tubing device may be not only a low-head specification with a step on the work deck scaffolding, but also a standard one with a flat scaffolding as a whole.

11...tubing device, 12...base frame, 13...lifting cylinder, 14...drive frame, 15...chuck cylinder, 16...chuck frame, 16a...side end, 16b...mounting portion, 17...casing insertion hole, 18...hydraulic motor, 19...reduction gear, 20...cone bearing, 21...main chuck, 22...link, 23...chuck bearing, 24...opening, 25...work deck, 26... ladder, 27... central deck section, 27a... frame body, 27b... scaffolding board, 28... handrail, 29... hanging ear, 30... hanging hardware, 31... deck attachment/detachment guide, 32... frame side guide member, 32a... flat section, 32b... legs, 32c... mounting section, 33... deck side guide member, 33a... fixing plate, 33b... abutment plate, 33c... back nut, 33d... inclined section, 34... mounting bolt, 35... stay member, 36... mounting bolt

Claims (5)

A tubing device comprising: a base frame to be installed on the ground; a drive frame provided above the base frame so as to be able to rise and fall via a lifting cylinder; a chuck frame provided above the drive frame so as to be able to rise and fall via a chuck cylinder; and a casing insertion hole vertically penetrating central portions of the base frame, the drive frame and the chuck frame; and a work deck which has an opening corresponding to the position of the casing insertion hole and can be attached and detached by a hoisting operation, provided on the chuck frame,
a deck attachment/detachment guide for engaging a part of the work deck and a part of the chuck frame with each other as the work deck moves downward;
The deck attachment/detachment guide is characterized in that it is composed of a frame side guide member provided on one side of the chuck frame, and a deck side guide member provided on the underside of the work deck and capable of engaging with each of the frame side guide member and the chuck frame. At least one of the deck-side guide member and the frame-side guide member is made up of a plurality of guide members arranged independently of each other, and the guide member on the other side is arranged between the plurality of guide members,
The tubing device described in claim 1, characterized in that the multiple guide members are a total of four guide members, two of which are arranged on either side of an imaginary plane that passes through the central axis of the casing insertion hole and is parallel to the width of the device, and two of which are paired with the above and arranged at a position rotated 180 degrees around the central axis of the casing insertion hole as an axis of rotational symmetry. The tubing device according to claim 1 or 2, characterized in that the deck side guide member has an inclined portion that causes the deck side guide member and the chuck frame to slide in directions away from each other when they come into contact with each other in relation to the frame side guide member or the chuck frame. The tubing device according to any one of claims 1 to 3, characterized in that the deck side guide member is fixed to the work deck by bolt fastening. The tubing device according to any one of claims 1 to 4, characterized in that the frame side guide member has an attachment portion to which the work deck is detachably attached.

Images