Slide form

Abstract

To provide a slide form with excellent work efficiency.SOLUTION: A slide form having a center of gravity comprises: a formwork portion for placing concrete; and a hanging jig having a connecting portion connectable to an external lifting tool and a changing mechanism for changing a relative position between the connecting portion and the center of gravity and swingably connected to the formwork portion.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a slip form.

Background Art

[0002] When placing concrete on the wall surface of a structure or the like, it has been conventionally practiced to use a slip form (Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the prior art, in the case of a wall where the angle of the wall surface changes in the vertical direction, it takes time and effort to install the slip form, and it has been difficult to efficiently progress the concrete placement work.

Means for Solving the Problems

[0005] As one aspect, the present invention provides a slip form having a center of gravity, comprising a formwork portion for concrete placement, a connection portion connectable to an external hoist, and a change mechanism for changing the relative position between the connection portion and the center of gravity, and further comprising a suspension jig swingably connected to the formwork portion.

Effects of the Invention

[0006] According to the present invention, it is possible to provide a slip form with good working efficiency.

Brief Description of the Drawings

[0007] [Figure 1] It should be noted that there is an incorrect "十九" in the translation of item . It should be corrected to the correct content according to the original text. Also, there are some incorrect tags in the "了0000032" in item . Please check and correct them according to the actual situation.This is a cross-sectional view of a tunnel with a slide form installed according to the embodiment, showing the progress of concrete lining pouring in the order of Figures (a) and (b). [Figure 2] This is a cross-sectional view of the tunnel in the embodiment. [Figure 3] This is a slide form in an embodiment, showing it in a state where it has been lifted by a crane. [Figure 4] This figure shows the slide form in an axial view in the embodiment. [Figure 5] This is a right side view of the formwork portion in the embodiment. [Figure 6] This is a top view of the lifting jig in the embodiment. [Figure 7] This is a cross-sectional view taken along the line VII-VII in Figure 6. [Figure 8] This is an enlarged view of the motor and winch in the embodiment. [Figure 9] This is a modified slide form, showing the state in which it is lifted by a crane. [Modes for carrying out the invention]

[0008] <Overview> Referring to Figures 1 to 8, a slide form 1 according to an embodiment of the present invention will be described below. The slide form 1 is a member used as formwork when pouring concrete into a structure such as a wall. In this embodiment, the slide form 1 is installed inside a tunnel T and used for pouring the lining concrete of the tunnel.

[0009] Slide form 1 is arranged in the axial direction of tunnel T within the tunnel T and suspended by crane C (Figure 2). In the following explanation, the axial direction, vertical direction, and left-right direction (perpendicular to the axial direction) are defined and used as shown in each figure. Slide form 1 is positioned on both the left and right sides of tunnel T, but the following explanation is based on the case where it is positioned on the left side.

[0010] As shown in Figure 3 and other figures, the slide form 1 comprises a formwork section 2, scaffolding 3, a lifting jig 4, and braces 5 and 6.

[0011] The formwork section 2 is a member that functions as formwork for the wall surface and a support for the formwork when the wall is poured with lining concrete. As shown in Figures 3 to 5, the formwork section 2 comprises a flat plate-shaped formwork 21 that comes into contact with the concrete during pouring, and three support members 22 that support the formwork 21. The formwork 21 is arranged to extend along the wall surface of the lining concrete in the axial direction and substantially vertically. The support members 22 are steel members that extend substantially vertically along the formwork 21 and are fixed to anchors A (anchor A located at the bottom in Figures 1(a), 3 to 5) embedded in the wall of the tunnel T.

[0012] Scaffolding 3 is a component that forms a workspace for workers, and as shown in Figures 3 and 4, it has planks 31 that form the work platform, beams 32, columns 33, upper columns 34, crossbars 35, and braces 5. Workers move to scaffolding 3 via elevators or external scaffolding. Note that in Figures 3 and later, the elevators inside and outside scaffolding 3 are not shown for the sake of clarity.

[0013] The planks 31 are rectangular flooring materials with their longer sides extending in the axial direction, and are installed between multiple beams 32. The planks 31 are made of materials such as checkerboard or expanded metal.

[0014] The beams 32 are rod-shaped steel members that extend in a direction intersecting the formwork 21, and are arranged in parallel in groups of three at the top, bottom, and middle of the support members 22. Each beam 32 has one end 32A and the other end 32B. The one end 32A is pin-connected to the support member 22 and is rotatable up and down, while the other end 32B is pin-connected to the column 33.

[0015] The column 33 is a rod-shaped steel material that extends roughly vertically, and its upper and lower ends are pin-connected to the other end 32B, respectively.

[0016] The upper column 34 is a rod-shaped steel material extending substantially in the vertical direction, and its lower end is rigidly connected to the upper end of the other end portion 32B.

[0017] The cross bar 35 is a steel material such as an angle steel extending in the axial direction, and a plurality of them are arranged so as to be arranged at substantially equal intervals in the vertical direction and are fixed to the column 33 and the upper column 34. The cross bar 35 has a function of preventing the operator from falling.

[0018] As described above, the beam 32, the column 33, and the formwork portion 2 and the beam 32 are pin-jointed to each other. Therefore, the formwork portion 2 and the scaffold 3 can swing up and down as shown by the arrows in FIG. 4. When swinging, the formwork portion 2 and the scaffold 3 maintain their outer shapes in a parallelogram shape in the axial direction view.

[0019] The strut 5 is a rod-shaped member that connects the other end portion 32B and the support member 22 and has a function of restraining and regulating the movement of the other end portion 32B (FIGS. 3 and 4). In the present embodiment, the strut 5 is a turnbuckle that generates a reaction force against both tensile and compressive loads, and includes a central body portion 51 and two end portions 52. Both ends of the body portion 51 are provided with female threads and are screwed and joined to the end portions 52 provided with male threads. The strut 5 can be extended and contracted by rotating the body portion 51 with respect to the end portion 52 using a ratchet or the like (not shown). Note that, as the strut 5, it is also possible to use a device such as a jack instead of a turnbuckle.

[0020] The strut 5 can restrain the scaffold 3 from swinging with respect to the formwork portion 2. In addition, the operator can adjust the swing angle of the scaffold 3 with respect to the formwork portion 2 by extending and contracting the strut 5.

[0021] As shown in FIGS. 6 to 8, the suspension jig 4 includes a support member 41, a connection portion 42, a change mechanism 43, and a strut 6.

[0022] The support member 41 is composed of two parallel H-shaped steel beams and extends in a direction intersecting the formwork 21. The support member 41 has one end 411 and the other end 412. The one end 411 is pin-connected to the formwork section 2 via a connecting member and is rotatable vertically. Therefore, the support member 41 can swing vertically relative to the formwork section 2.

[0023] The connecting portion 42 is a metal fitting fixed to the upper end of the support member 41 and has the function of connecting the support member 41 to an external lifting device, etc. Specifically, the connecting portion 42 is connected to lifting devices such as shackles and wires, and the support member 41 is suspended by the crane C via these lifting devices.

[0024] The modification mechanism 43 is a mechanism that changes the center of gravity position of the slide form 1 relative to the connection part 42, and comprises a motor 431, a winch 432, a pulley 433, a wire 434, and a weight 435.

[0025] The motor 431 is a device that drives the wire 434 via the winch 432 and is fixed to the support member 41. As shown in Figure 8 and other figures, the output shaft of the motor 431 is connected to the winch 432 via an endless wire 431A, and can drive the winch 432.

[0026] The winch 432 is a component that drives the wire 434 and is fixed to the support member 41. The winch 432 has a handle 432A and a drum section 432B that is rotationally driven by the handle 432A. An endless wire 431A is mounted on the shaft of the handle 432A, and the wire 434 is mounted on the drum section 432B (Figure 8).

[0027] The winch 432 receives driving force from the motor 431 via the endless wire 431A, and can move the wire 434 by rotating the handle 432A and the drum section 432B. The winch 432 has a built-in stopper that prevents the drum section 432B from rotating due to external forces, thereby preventing accidental movement of the wire 434.

[0028] The pulley 433 is rotatably supported at its other end 412 (see Figure 7, etc.). A wire 434 is stretched between the pulley 433 and the drum section 432B. The wire 434 is driven by a motor 431 that drives the winch 432, or by the winch 432, and can circumvent the pulley 433 and the drum section 432B.

[0029] The weight 435 is suspended from the support member 41. The weight 435 is equipped with a roller 435A that runs along the lower flange of the support member 41 and is movable between the drum section 432B and the pulley 433. The weight 435 is connected to both ends of the wire 434. Therefore, as shown by the white arrows in Figure 3, the weight 435 can move left and right along the support member 41 as the wire 434 rotates.

[0030] The brace 6 is an extendable rod-shaped member that connects the support member 41 and the support member 22 (Figure 7). In this embodiment, the brace 6 is a turnbuckle that exhibits a reaction force against both tensile and compressive loads, and comprises a body 61, two ends 62, and a ratchet 63 attached to the body 61. Both ends of the body 61 are threaded, and are screwed into the ends 62 which are threaded, to join them. The worker can extend or retract the length of the brace 6 by rotating the body 61 using the ratchet 63. Note that instead of a turnbuckle, other devices such as jacks can also be used as the brace 6.

[0031] The brace 6 can restrain the support member 41 so that it cannot swing relative to the formwork section 2. Furthermore, the worker can adjust the swing angle of the support member 41 relative to the formwork section 2 by extending or retracting the length of the brace 6.

[0032] <Operation> The concrete placement process using Slide Form 1 will be explained below using an example of constructing the lining concrete wall in a tunnel T. The wall of tunnel T is constructed by raising and fixing Slide Form 1 above the hardened wall, and then sequentially placing concrete upwards. Figure 1 shows the outline of the lining concrete (placement lift) constructed in a single placement by a dashed line.

[0033] In the concrete placement process, the slide form 1 is first installed on the wall surface of the tunnel T in order to pour the concrete. Specifically, the slide form 1 is installed by fixing the support material 22 to anchor A.

[0034] Next, concrete is poured between the formwork 21 and the natural ground (or primary lining). New anchors A (anchor A1 in Figures 1, 3-5) are embedded where the concrete is poured.

[0035] After the concrete has hardened, the worker moves the slide form 1 upward to construct a new wall. During the movement, the worker extends and retracts the braces 5 to swing the scaffolding 3 relative to the formwork section 2, changing the angle and shape of the scaffolding 3 relative to the formwork section 2, and adjusting it so that the planks 31 are horizontal. In addition, the worker extends and retracts the braces 6 to change the angle of the formwork section 2 relative to the support member 41, and adjusts the formwork 21 to match the angle of the wall surface to be newly constructed.

[0036] Because the center of gravity of the slide form 1 (shown as center of gravity G in Figure 3) shifts due to changes in the angle and shape of the formwork section 2, scaffolding 3, and support member 41, the weight 435 is moved. Specifically, the worker moves the weight 435 by driving the motor 431 or by directly rotating the handle 432A. Moving the weight 435 moves the center of gravity G to directly below the hook of the crane C. This allows the crane C to maintain the horizontal position of the planks 31 and support member 41. Furthermore, the crane C can fix the angle of the formwork section 2 to match the wall surface and stably support the slide form 1.

[0037] As shown in Figure 1(b), once the formwork 21 is installed at the new concrete pouring location, the support member 22 is fixed to the anchor A1.

[0038] The construction of the lining concrete wall progresses as the above process is repeated. When the slide form 1 is moved, the workers change the angle and shape of the formwork section 2 and scaffolding 3 as described above, and further adjust the position of the center of gravity G to advance the work.

[0039] Since the winch 432 has a built-in stopper that prevents the drum section 342B from rotating, accidental movement of the weight 435 is prevented. Therefore, workers can safely perform the lifting, moving, and installation work of the slide form 1.

[0040] <Effects> In the above embodiment, the slide form 1 comprises a formwork section 2 for concrete pouring and a lifting jig 4. The lifting jig 4 includes a connecting section 42 that can be connected to an external lifting device, and a changing mechanism 43 that changes the relative position between the connecting section 42 and the center of gravity G, and is swingable relative to the formwork 21.

[0041] The slide form 1 allows for changes in the position of its center of gravity G relative to the connection section 42 via the modification mechanism 43. This enables workers to efficiently advance their work without having to repeatedly disassemble and reassemble the formwork section 2 and scaffolding 3. A major advantage is that lifting operations and concrete pouring operations using the slide form 1 can be performed even in sites like tunnels T, where structures and terrain overhang above, limiting the height of the crane C's tip.

[0042] The lifting jig 4 further comprises a support member 41 that supports the connecting portion 42 and the changing mechanism 43. The changing mechanism 43 includes a weight 435 and a motor 431, a winch 432, a pulley 433, and a wire 434 for moving the weight 435 along the support member 41. The motor 431 to the wire 434 correspond to the moving portion in this invention.

[0043] The wire 434 is stretched across the pulley 433 and connected to the weight 435. A motor 431 or winch 432 can drive the wire 434 and make it rotate.

[0044] With the above configuration, the weight 435 can be easily moved using the motor 431 or winch 432, and the position of the center of gravity G can be adjusted.

[0045] The slide form 1 includes a brace 6 (corresponding to the first control member) that controls the swinging of the lifting jig 4 relative to the formwork section 2.

[0046] With the above configuration, workers can extend or retract the brace 6 to change the angle between the support member 41 and the formwork section 2, and adjust it to the shape and angle of the area to be newly constructed. Since the work can be carried out without reassembling the formwork section 2 or the lifting jig 4, work efficiency is improved.

[0047] The slide form 1 includes a scaffold 3 that is pivotably connected to the formwork section 2. It also includes a brace 5 (corresponding to a second control member) that controls the pivoting of the scaffold 3 relative to the formwork section 2.

[0048] With the above configuration, workers can adjust the angle of the scaffolding 3 relative to the formwork section 2 and make the planks 31 horizontal. In other words, regardless of the installation angle of the formwork section 2, the scaffolding 3 can be adjusted to an environment suitable for work. Furthermore, angle adjustment and fixing can be easily performed using the braces 5.

[0049] The scaffolding 3 comprises a beam 32 that is pivotably supported relative to the formwork section 2, a column 33 that is pin-connected to the beam 32, and a plank 31 that is erected on the beam.

[0050] As described above, by making each member of the scaffolding 3 pivotable or by using pin joints, the angle and shape of the scaffolding 3 can be changed in accordance with the installation angle of the formwork section 2, and the planks 31 can be made horizontal. In other words, regardless of the installation angle of the formwork section 2, the scaffolding 3 can be easily transformed into a shape suitable for the work.

[0051] <Variation> In the above embodiment, the slide form 1 had a configuration in which the weight 435 moved relative to the connecting portion 42. In the present invention, instead of this configuration, the connecting portion may be configured to move.

[0052] Figure 9 shows a simplified diagram of the slide form 100 with a modified configuration. The support member 41 includes a formwork section 2, scaffolding 3, and braces 5 and 6, which have the same configuration as in the above embodiment. In the following, members having the same configuration as in the embodiment will be given the same reference numerals as in the embodiment, and their descriptions will be omitted.

[0053] The slide form 100 includes a lifting jig 104. The lifting jig 104 includes a connecting portion 142 that is movably attached to the support member 41. The connecting portion 142 includes a roller 142A that can travel along the flange of the support member 41 and is movable along the support member 41.

[0054] The connecting part 142 is connected to the wire 434 and driven by the changing mechanism 143. The weight 435 is fixed immovably to the support member 41.

[0055] The other components of the lifting jig 104 are the same as those in the above embodiment.

[0056] In the modified slide form 100 shown, the relative position between the center of gravity G and the connecting part 142 can also be changed. The operator can drive the changing mechanism 143 to move the connecting part 142 left or right, adjusting it so that the center of gravity G is located directly below the hook of the crane C.

[0057] <Other variations> The connection points of the diagonal braces 5 and 6 can be changed depending on the conditions. Therefore, the diagonal braces 5 and 6 may be installed to extend diagonally across the frame and used like braces.

[0058] The number of components constituting the scaffolding 3 can be changed according to the conditions. For example, the number of beams 32 and columns 33 can be changed, or the installation locations of the planks 31 can be changed as appropriate. The same applies to the formwork section 2, the lifting jigs 4, and the braces 5 and 6; for example, the size of the formwork 21, the shape of the support material 22, the number and length of the support members 41, etc., can be changed according to the construction conditions. [Explanation of Symbols]

[0059] 1 Slide Form 2 Formwork section 3. Scaffolding 4 Hanging jig 5-way cane 6-way cane

Claims

[Claim 1] It is a slide form with a center of gravity, Formwork section for concrete pouring, The system comprises a connecting portion that can be connected to an external lifting device, and a lifting jig that has a changing mechanism to change the relative position between the connecting portion and the center of gravity, and is swingably connected to the formwork portion, The aforementioned suspension jig further includes a support member that supports the connecting portion and the changing mechanism, The aforementioned modification mechanism includes a weight and a moving part that moves the weight along the support member. The aforementioned movable part is Pulley and, A wire is stretched across the pulley and connected to the weight, A drive unit that drives the aforementioned wire, Slide form.

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