JP7555596B2 - Method for fixing collars in centerform side panels and device for inverting centerform side panels - Google Patents

Description

The present invention relates to a center form (hereinafter, mainly referred to as form) that has a molding surface for the lining concrete in a center used to mold the lining concrete on the inner surface of a tunnel. In particular, the present invention relates to a method for fixing collars on adjacent center form side panels and a device for reversing center form side panels.

Patent Document 1 discloses the technology shown in Figures 1 and 2. That is, the lining concrete 12 poured on the inner surface of the tunnel 11 is formed by a center 13, which serves as a concrete formwork device. The center 13 is composed of multiple connected forms 14. Each form 14 has a face plate 16 for forming the inner surface of the lining concrete 12, and center form side plates (hereinafter referred to as side plates) 17 located on both side ends of the face plate 16. Then, as shown in Figures 2 and 3, adjacent forms 14 in the horizontal direction, which is the tunnel extension direction, are connected at the side plates 17 by bolts (not shown).

JP 2017-125325 A

If a difference in height occurs between the face plates 16 of adjacent forms 14, a step will occur on the inner circumferential surface of the lining concrete 12, deteriorating the appearance quality of the lining concrete 12. For this reason, as shown in Figures 3 and 4(a), a collar 18 for positioning is fixed to the positioning hole 19 of adjacent side plates 17, and the side plates 17 are positioned by a connecting pin 20 passing through the center hole 18c of the collar 18. The collar 18 has a large diameter portion 18a and a small diameter portion 18b, and the small diameter portion 18b is fitted into the positioning hole 19, while the large diameter portion 18a is welded to the side of the side plate 17. The height of the small diameter portion 18b is formed lower than the depth of the positioning hole 19 of the pair 171 of the two overlapping side plates 17 (hereinafter referred to as the side plate pair). In addition to the positioning hole 19, a number of holes 21 are formed in the side plate 17, and these holes 21 are for other purposes such as the bolts.

In addition, functional parts 24 for reinforcement and the like are welded to the side plates 17 .
The collars 18 of two adjacent side plates 17 are positioned relative to each other while the side plates 17 are aligned. That is, the two side plates 17 are stacked and fixed with their outer peripheral end faces aligned to form a side plate pair 171. The alignment and fixing of the side plates 17 is performed by temporary fastening members 23 such as bolts (not shown) and nuts (not shown) passing through holes 21 other than the positioning holes 19. Then, while the aligned state of the side plates 17 is maintained, the side plate pair 171 is held in a horizontal plane as shown in FIG. 4B. In this state, the collar 18 is fitted into the positioning hole 19 of one of the side plates 17 and welded.

Next, the pair of side plates 171 is turned upside down, and as shown in FIG. 4(c), the other collar 18 of the other side plate 17 is fitted, and a centering pin 22 similar to the connecting pin 20 is inserted into the center hole 18c of both collars 18 to align the two collars 18. In this state, the other collar 18 is welded to the side plate 17 in the same manner as the collar 18 that has already been welded. However, this welding may be performed in the position shown in FIG. 4(c) or in the upright position shown in FIG. 4(a).

Thus, both side plates 17 and the collars 18 of both side plates 17 are positioned relative to each other. After that, these side plates 17 are separated from the overlapping state and integrated with the face plate 16 to produce the form 14. Then, as shown in Figures 3 and 4(a), when the form 14 is assembled as the center 13, the two aligned pair of side plates 17 are placed adjacent to each other with the collars 18 facing each other. Then, when both collars 18 are connected in a positioned state by the connecting pin 20, the adjacent side plates 17 are joined with their outer shapes matching. Therefore, the face plates 16 of adjacent forms 14 are continuous to form the same plane.

Incidentally, as described above, when attaching the collars 18 to the side plates 17, it is necessary to turn the side plates 17 over.
In this case, since the side plate pair 171 consisting of two side plates 17 is heavy, a crane (not shown) has been used in the past. That is, a chuck of the crane is attached to the side plate pair 171, and the side plate pair 171 is lifted and transported to the work position. Then, at the work position, the chuck of the crane is removed and a collar 18 is attached to one of the side plates 17. Next, a chuck is attached again to the side plate pair 171 and lifted, and then the side plate pair 171 is hung while being turned upside down, and is set at the work position again, and the chuck is removed. Then, after the work of attaching the collar 18 is completed, a chuck is attached to the side plate pair 171, and the side plate pair 171 is lifted and transported out.

As described above, in the past, when flipping the side plate pair 171 to the working position, it was necessary to attach and detach the crane chuck and lift and lower it using a crane. This was therefore time-consuming and inefficient.

In addition, there is a limit to the number of cranes that can be installed in a factory. Therefore, as mentioned above, frequent use of cranes slows down the progress of other work, which directly leads to a decrease in production efficiency in the factory.

The method for fixing the positioning parts of the centerform side panels of the present invention involves stacking and aligning two centerform side panels, then inverting them so that their sides face upwards, and at each inversion position, fixing collars for positioning the side panels to the pair of side panels. The pair of side panels is supported by a support that rotates in a vertical plane, and the inversion operation is performed by rotating the support.

In the above method, if the pair of side plates is supported on the support, there is no need to use a crane. This eliminates the need for lifting and suspending with a crane or attaching and detaching chucks. This makes it easy to attach the collar to the side plates.

The inversion device for the centerform side panels of the present invention is also characterized by having a support that can support the pair of centerform side panels in a stacked state, and a drive means that rotates the support between two positions 180 degrees apart.

Therefore, by rotating the support using the driving means, the pair of side plates can be easily inverted.

The present invention has the advantage that the side panels can be easily inverted without using a crane or other device, making it easy to attach the collar.

Cross-section of the tunnel when the center is in use. FIG. FIG. 3 is a perspective view showing the assembled state of the foam as viewed from a different direction than FIG. 2 . (a) is a cross-sectional view of the collar portion of adjacent forms, (b) is a cross-sectional view showing the state where a collar is attached to one of the side panels, and (c) is a cross-sectional view showing the state where collars are attached to both side panels. FIG. 4A is a side cross-sectional view showing a main body of the inversion device, and FIG. FIG. 4 is a front view showing a state in which a pair of side plates are supported on the reversing device. FIG. 13 is a perspective view showing a state in which a collar is attached to the first side plate. FIG. FIG. 13 is a perspective view showing a state in which a collar is attached to the second side plate.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for fixing a collar in a centerform side panel and an inversion device for a centerform side panel according to an embodiment of the present invention will now be described with reference to the drawings.
(Reversing device)
First, the configuration of the reversing device will be described.

As shown in Figures 5, 6(a) and 6(b), a pair of stands 33 are erected on the base 32 of the main body 31 of the reversing device 30, and an operating shaft 34 is rotatably supported between the bearings 33a at the upper ends of both stands 33. A geared motor with a brake (hereinafter simply referred to as the motor) 35 is supported on the base 32 as a driving means, and its motor shaft 36 is connected to the operating shaft 34 via reduction gears 37 and 38.

Between the two stands 33, an arm unit 41 is fixed to the operating shaft 34. A pair of arms 42 are provided at a distance from each other on this arm unit 41 as supports capable of supporting a pair of side plates 171 (described below). As shown in FIG. 6(b), a small diameter portion 43 is formed as a protrusion at the tip of each arm 42, and a screw hole 44 is formed as a screw portion at the tip of the small diameter portion 43. The tip surfaces of both arms 42 form receiving surfaces 45 as support surfaces. The height of the small diameter portion 43 is lower than the thickness of the pair of side plates 171, which is made up of two side plates 17.

As shown by the solid and two-dot chain lines in FIG. 6(a), the arm 42 can be rotated in a vertical plane by the drive of the motor 35. In this embodiment, the arm 42 can be stopped at the first to third positions P1 to P3 by the operation of a control device in accordance with the operation of an operator. In the first position P1, the receiving surface 45 is located in an upward horizontal plane, in the second position P2, the receiving surface 45 is located in a vertical plane, and in the third position P3, the receiving surface 45 is located in a downward horizontal plane at the same height as the first position P1. Reference numeral 39 in FIGS. 7 to 9 denotes a cover for covering the motor 35.

Support members 51 constituting the inversion device 30 are installed on the floor on both sides of the main body 31 of the inversion device 30. These support members 51 have casters 52 at their lower ends, so they can move freely in all directions on the installation surface of the support members 51, such as the floor. A number of support pins 53 are provided facing upward at the upper end of the support members 51. The upper ends of these support pins 53 are at the same height as the receiving surfaces 45 at the first position P1 and the third position P3.

(Side plate alignment method)
Next, a description will be given of a method for aligning the side plate 17 using the reversing device 30. In this embodiment, the side plate 17 of the center 13, for example, the side form, is the subject of the alignment method.

As shown in FIG. 4(c) and FIGS. 7 to 10, the two side plates 17 are temporarily fixed in place in the previous process by inserting temporary fastening members 23 such as bolts into holes 21 at appropriate positions. At this stage, the two side plates 17 are aligned with each other so that their outer circumferential edges coincide, forming a pair of side plates 171.

In this state, the arm 42 is placed in the second position P2 as shown in FIG. 9. Then, as shown in FIG. 6(a), the pair of side plates 171 are supported by the small diameter portions 43 at the tips of both arms 42 at a pair of holes 21 in the center. However, FIG. 6(a) illustrates the pair of side plates 171 in a horizontal state. Then, the bolt 46 is screwed into the screw hole 44 of the small diameter portion 43. In this way, the side plate 17 is fastened by the head of the bolt 46 via the washer 47, and is sandwiched between the receiving surface 45 at the tip of the arm 42 and the washer 47.

Next, the arm 42 is placed in the first position P1 shown in Figures 6(a), 6(b), 7, and 8. In this way, the side plate pair 171 is positioned with the side surface facing upward. At this time, as shown in Figure 7, support members 51 are placed below both ends of the side plate pair 171 so that the side plate pair 171 does not sag due to its own weight, and the side plate pair 171 is supported from below by support pins 53.

In this state, as shown in FIG. 4(b), the collar 18 is fitted into the positioning hole 19 of the upper side plate 17 at its small diameter portion 18b, and the collar 18 is welded to the side plate 17 at its large diameter portion 18a.

Next, the arm 42 is placed in the third position P3 shown in FIG. 10. In this way, the side plate pair 171 is turned upside down, with the opposite side surface of the side plate pair 171 facing upward. In this case, too, the support pins 53 of the support members 51 hold the side plate pair 171 without allowing either end to sag.

In this state, as shown in FIG. 4(c), the collar 18 is fitted into the positioning hole 19 of the upper side plate 17, and the center alignment pin 22 is inserted into the center hole 18c of the collar 18 and the collar 18 that has already been welded. In this case, even if there is misalignment between the collar 18 and the collar 18 that has already been welded, the unwelded collar 18 is moved by the clearance between its small diameter portion 18b and the inner surface of the positioning hole 19. As a result, both collars 18 are aligned. In this way, with the two side plates 17 positioned, the collars 18 are also positioned relative to each other. Then, in this positioned state, the collar 18 that is fitted later is also welded to the side plate 17.

The side plates 17, which are thus positioned relative to one another via the collars 18, are removed from the arm 42 by placing the arm 42 in the second position P2 and removing the bolts 46, and are then sent to a subsequent process.

8 and 9, the side plate 17 is supported by the arm 42 so that both ends of the side plate 17 are positioned above the center at the second position P2 of the arm 42. Conversely, the side plate 17 may be supported by the arm 42 so that both ends of the side plate 17 are positioned below the center.

The functional component 24 fixed to the side plate 17 may be welded to the side plate 17 at any one of the first position P1 to the third position P3.
Thereafter, in a subsequent process, the centering pins 22 and the temporary fixing members 23 are removed, and the two side plates 17 are separated. Then, the side plates 17 and the face plate 16 are welded together, and the form 14 is manufactured.

When assembling the form 14 as the center 13, the adjacent side plates 17 are aligned in the same paired relationship as when they were aligned, and the connecting pin 20 is inserted into the center hole 18c of both collars 18, so that both collars 18 are in the specified positional relationship. Therefore, the adjacent forms 14 are also in the correct positional relationship via both collars 18, and the adjacent face plates 16 are continuous on the same plane. This improves the appearance quality of the inner surface of the tunnel lining concrete 12.

(Effects of the embodiment)
This embodiment has the following advantages.
(1) With the side plate pair 171 supported by the arm 42, the arm 42 rotates to perform an inversion operation of the side plate pair 171 at 180 degrees from front to back. Then, with the side plate pair 171 supported by the arm 42 at each inversion position, the collar 18 is attached to the side plate pair 171. Therefore, there is no need to hoist or hang the side plate pair 171 by a crane or to attach or remove a chuck. Therefore, the collar 18 can be easily attached in a short time.

(2) Since there is no need to use a crane to invert the side plate pair 171, it is possible to avoid interference with crane operations that are different from those in the embodiment within the factory.
(3) The side plate pair 171 can be clamped between the tip surface of the arm 42 and the head of the bolt 46, so that unnecessary movement of the side plate pair 171 can be prevented. Therefore, the installation work of the collar 18 can be performed efficiently.

(4) When the side plate pair 171 is positioned at the first position P1 and the third position P3 in the horizontal plane, both ends of the side plate pair 171 can be supported from below by the support members 51. This prevents both ends from sagging or moving unnecessarily, allowing the collar 18 to be attached accurately and efficiently.

(Example of change)
The present invention is not limited to the above-mentioned two embodiments, and may be embodied in the following forms. The above-mentioned two embodiments and the following modified examples may be combined with each other within a range not contradictory to each other.

- In the above embodiment, the invention is embodied in the attachment of a collar to the side panel of a side form, but it can also be embodied in other types of forms, such as top forms and inverted forms.

In the above embodiment, the side plate pair 171 is supported on the arm 42 by the bolts 46. Instead of this, the side plate pair 171 may be magnetically attracted to the arm 42 and held thereon.
In the above embodiment, the screw hole 44 is formed at the tip of the small diameter portion 43 of the arm 42. In contrast to this configuration, a male screw may be provided at the tip of the small diameter portion 43, and the pair of side plates 171 at the tip of the arm 42 may be fastened by a nut screwed onto the male screw.

17: Side plate 19: Positioning hole 18: Collar 20: Connecting pin 30: Reversing device 31: Main body 41: Arm unit 42: Arm 51: Support member 171: Pair of side plates P1: First position P2: Second position P3: Third position

Claims (6)

A method for fixing collars to a center form side panel, the method comprising: fixing two collars having holes into which connecting pins for positioning two side panels of the center form are inserted, to each of the two side panels before the side panels are integrated with a face plate that constitutes the center form,
an actuation shaft supported for axial rotation and extending in a first direction;
a support provided so as to be rotatable about a rotation axis parallel to the first direction by axial rotation of the operating shaft,
the support body has a support portion capable of supporting the pair of side plates in a state in which the two side plates are overlapped and aligned, in a posture that can be inverted by axial rotation of the operating shaft,
a step of supporting the pair of side plates on the support portion of the support body;
a step of fixing the collar to one of the pair of side plates that is in a predetermined position with the support body in a first position;
a step of rotating the support from the first position to the second position by axial rotation of the operating shaft , thereby inverting the pair of side plates supported by the support;
and fixing a collar to the other side panel of the pair of side panels, the other side panel being in an inverted position with the support body in the second position, in a position coaxial with the collar fixed to the one side panel. the first position and the second position are in a positional relationship in which the support is rotated 180 degrees around the rotation axis,
A method for fixing a collar in a centerform side panel as described in claim 1, wherein, when the support body is in the first position and the second position, the pair of side panels supported by the support portion are positioned in a position in which one side surface faces upward and is horizontal, and a position in which the other side surface opposite the one side surface faces upward and is horizontal . The side plate is a long plate material,
The support portion supports a central portion of the pair of side plates in a longitudinal direction ,
3. A method for fixing a collar to a centerform side panel according to claim 2, wherein when said side panel pair is in said horizontal state , both sides of said longitudinal direction of said side panel pair are supported from below by support members . A reversing device for reversing a pair of side plates between two positions in which two collars having holes into which connecting pins for positioning two side plates of a central form are inserted are fixed to each of the two side plates before they are integrated with a face plate constituting the central form,
an actuation shaft supported for axial rotation and extending in a first direction;
a support provided to be rotatable about a rotation axis parallel to the first direction by axial rotation of the actuation shaft ;
a driving means for pivoting the support between a first position and a second position by axially rotating the actuating shaft;
the support body has a support portion capable of supporting the pair of side plates in a state in which the two side plates are overlapped and aligned in a posture that can be inverted by axial rotation of the actuation shaft, and is configured to be able to be disposed at the first position and the second position by rotating about the rotation axis,
The driving means is
By disposing the support member supporting the pair of side plates at the first position, the pair of side plates is disposed in a predetermined posture in which an operation of fixing the collar to one of the pair of side plates is performed;
A centroform side panel inversion device which rotates the support from the first position to the second position after the collar is fixed to one of the side panels, thereby inverting the pair of side panels to a position in which the collar can be fixed to the other side panel of the pair of side panels in a position coaxial with the collar fixed to the one of the side panels. The centerform side panel inversion device of claim 4, wherein the support body is configured to support the pair of side panels supported by the support portion in a position in which one side surface faces upward and is horizontal, and a position in which the other side surface opposite the one side surface faces upward and is horizontal, at the first position and the second position. The support body includes an arm having the support portion at a tip thereof ,
The support portion is
A support surface capable of supporting the pair of side plates;
a protrusion formed on the support surface;
The projection has a threaded portion at its tip ,
the side plate has a second hole different from the hole;
The centerform side panel inversion device of claim 4 or 5, wherein the pair of side panels are fixed to the support portion while supported by the support surface by screwing a fastening member into the threaded portion while inserting the protrusion into the second hole .

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