Repair method and repair jig for passenger conveyors

Abstract

The objective is to obtain a repair method and repair jig for passenger conveyors that can stably carry out repair work while suppressing deformation of the truss. [Solution] The escalator repair method includes a jig installation step, a jacking-up step, and a support removal step. The jig installation step is the step of inserting the insertion part of the repair jig 40 into the space of the fixing member 13. The jacking-up step is the step of lifting the jacking part 42 of the repair jig 40 with a jacking device 34 to separate the existing fixing member 13 from the upper end of the existing intermediate support 21. The support removal step is the step of removing the existing intermediate support 21 from below the existing fixing member 13.

Description

[[Technical Field]]

[0001] The present disclosure relates to a renovation construction method and a renovation jig for a passenger conveyor. [[Background Art]]

[0002] In a conventional passenger conveyor, an intermediate portion in a longitudinal direction of a truss is supported by a pair of existing intermediate supports and a pair of new intermediate supports. The pair of existing intermediate supports are disposed at both ends in a width direction of the truss. The pair of new intermediate supports are disposed between the pair of existing intermediate supports (see, for example, Patent Document 1). [[Prior Art Documents]] [[Patent Documents]]

[0003] [[Patent Document 1]] Japanese Unexamined Patent Publication No. 2021-4112 [[Summary of the Invention]] [[Problem to be Solved by the Invention]]

[0004] In the conventional passenger conveyor as described above, a new intermediate support is added at a position different from that of the existing intermediate support. However, such a configuration can only be applied to passenger conveyors in which the member supported by the existing intermediate support and the new intermediate support is disposed over the entire width direction of the truss.

[0005] Furthermore, since the existing intermediate supports installed based on old seismic standards remain, there is a risk that the existing intermediate supports may come into contact with the truss due to interlayer displacement of the building.

[0006] To solve these problems, it is sufficient to remove the existing intermediate support and install a new intermediate support at the same position as the existing intermediate support. However, if the existing intermediate support is simply removed, the heavy truss may deform and damage the equipment inside the truss.

[0007] This disclosure is made to solve the above-mentioned problems and aims to provide a repair method and repair jig for passenger conveyors that can stably carry out repair work while suppressing deformation of the truss. [Means for solving the problem]

[0008] The passenger conveyor repair method described herein includes a jig installation step of inserting the insertion part of a repair jig into the space formed between a fixing member, which is placed on an existing intermediate support that supports the middle part of the longitudinal direction of the truss and is fixed to the lower part of the lower beam in the truss, and the lower beam; a jacking-up step of lifting the jacking-up part of the repair jig using a jacking device installed alongside the existing intermediate support, thereby separating the fixing member from the upper end of the existing intermediate support; and a support removal step of removing the existing intermediate support from below the fixing member. The passenger conveyor repair jig according to this disclosure comprises an insertion part that is inserted into a space formed between a fixing member fixed to the lower part of the lower beam in a truss and the lower beam, and a jack-up part that protrudes from the insertion part to the outside of the space when the insertion part is inserted into the space and is jacked up by a jacking device. [Effects of the Invention]

[0009] According to this disclosure, renovation work can be carried out stably while suppressing deformation of the truss. [Brief explanation of the drawing]

[0010] [Figure 1] This is a schematic side view showing the escalator before modification according to Embodiment 1. [Figure 2] This is a side view showing an enlarged view of the main part of Figure 1. [Figure 3] Figure 2 is a side view showing the state in which the fixing member has detached from the intermediate support. [Figure 4] Figure 2 is a side view showing the intermediate support in contact with the truss. [Figure 5]It is an explanatory diagram showing a main part of an escalator after the renovation work according to Embodiment 1 in comparison with that before the renovation. [Figure 6] It is a perspective view showing a main part of the escalator before renovation. [Figure 7] It is a side view showing a main part of the escalator in FIG. 6. [Figure 8] It is a perspective view showing a renovation jig used in the renovation method of Embodiment 1. [Figure 9] It is a side view showing the renovation jig in FIG. 8. [Figure 10] It is a front view showing the renovation jig in FIG. 8. [Figure 11] It is a perspective view showing a state where renovation work on the escalator in FIG. 6 has been started. [Figure 12] It is a perspective view showing how a subsequent step of the work in FIG. 11 proceeds. [Figure 13] It is a perspective view showing how a subsequent step of the work in FIG. 12 proceeds. [Figure 14] It is a perspective view showing how a subsequent step of the work in FIG. 13 proceeds. [Figure 15] It is an explanatory diagram illustrating the action of the reinforcing portion in FIG. 14. DESCRIPTION OF EMBODIMENTS

[0011] Hereinafter, embodiments will be described with reference to the drawings. Embodiment 1. FIG. 1 is a side view schematically showing an escalator before renovation according to Embodiment 1. The escalator includes a truss, a plurality of steps (not shown), and a pair of balustrades. In FIG. 1, only one of the pair of balustrades is shown.

[0012] The truss is installed between an upper floor and a lower floor of a building. The plurality of steps are connected in an endless manner and supported by the truss. The pair of balustrades are erected on the truss.

[0013] Between the intermediate portion of the truss 11 in the longitudinal direction and the building frame 10, an existing fixing member 13 and an existing intermediate support 21 are interposed. The intermediate portion of the truss 11 in the longitudinal direction is supported by the existing intermediate support 21 via the existing fixing member 13.

[0014] Figure 2 is an enlarged side view showing a main part of Figure 1. The upper surface of the fixing member 13 is fixed to the lower surface of the truss 11. The bottom surface of the fixing member 13 is horizontal.

[0015] The existing intermediate support 21 includes an existing support base 22 and an existing spacer 23. The existing support base 22 is installed on the building frame 10. The existing spacer 23 is interposed between the upper surface of the existing support base 22 and the lower surface of the existing fixing member 13.

[0016] The existing fixing member 13 is placed on the spacer 23. That is, the existing fixing member 13 is not fixed to the existing intermediate support 21. Therefore, when interlayer displacement occurs in the building due to an earthquake or the like, the existing fixing member 13 can slide in the horizontal direction relative to the existing intermediate support 21. This suppresses damage to the truss 11 caused by interlayer displacement.

[0017] However, when large interlayer displacement occurs in the building, as shown in Figure 3, the existing fixing member 13 may fall off from the existing intermediate support 21, or as shown in Figure 4, the existing intermediate support 21 may come into contact with the truss 11.

[0018] In contrast, Figure 5 is an explanatory diagram showing a main part of the escalator after the repair work according to Embodiment 1, in comparison with that before the repair. In the escalator after repair, a newly-provided fixing member 14 is fixed to the lower surface of the truss 11. Further, a newly-provided intermediate support 31 is interposed between the newly-provided fixing member 14 and the building frame 10. The newly-provided intermediate support 31 includes a newly-provided support base 32 and a newly-provided spacer 33.

[0019] The upper surface of the newly installed fixing member 14 is fixed to the lower surface of the truss 11. The bottom surface of the newly installed fixing member 14 is horizontal. However, the size of the newly installed fixing member 14 is larger than the size of the existing fixing member 13. Therefore, the area of ​​the bottom surface of the newly installed fixing member 14 is larger than the area of ​​the bottom surface of the existing fixing member 13.

[0020] Furthermore, the position of the bottom surface of the newly installed fixing member 14 is lower by Δh than the position of the bottom surface of the existing fixing member 13. In other words, the bottom surface of the newly installed fixing member 14 is closer to the building structure 10 by Δh than the bottom surface of the existing fixing member 13.

[0021] Therefore, the height dimension of the newly installed intermediate support 31 is smaller than the height dimension of the existing intermediate support 21 by Δh.

[0022] By performing such modifications, it is possible to suppress the detachment of the fixing member 14 from the intermediate support 31 or the intermediate support 31 from coming into contact with the truss 11 in the event of larger inter-story displacements.

[0023] Next, the escalator repair method according to Embodiment 1 will be described. Figure 6 is a perspective view showing the main parts of the escalator before repair. Figure 7 is a side view showing the main parts of the escalator in Figure 6.

[0024] The truss 11 includes a pair of left and right upper beams 15, a pair of left and right lower beams 16, a plurality of vertical members 17, a plurality of inclined members 18, a plurality of upper horizontal members (not shown), and a plurality of lower horizontal members (not shown).

[0025] A pair of lower beams 16 are positioned directly below a pair of upper beams 15. Each vertical member 17 is fixed perpendicular to the upper beams 15 and lower beams 16 between the corresponding upper beams 15 and lower beams 16. Each inclined member 18 is fixed at an angle to the upper beams 15 and lower beams 16 between the corresponding upper beams 15 and lower beams 16.

[0026] Each upper horizontal member is fixed between a pair of upper beams 15. Each lower horizontal member is fixed between a pair of lower beams 16.

[0027] The existing fixing member 13 is fixed to the lower surface of the lower beam 16 by welding. The existing fixing member 13 is made of, for example, angle steel. A space 13a is formed between the lower surface of the lower beam 16 and the existing fixing member 13. The side shape of the space 13a is a right triangle.

[0028] Figure 8 is a perspective view showing a repair jig used in the repair method of Embodiment 1. Figure 9 is a side view showing the repair jig of Figure 8. Figure 10 is a front view showing the repair jig of Figure 8.

[0029] The repair jig 40 has an insertion part 41, a jack-up part 42, and a reinforcing part 43. The insertion part 41 is inserted into the space 13a. Preferably, the cross-sectional shape of the insertion part 41 is the same as that of the space 13a, i.e., a right triangle.

[0030] The jack-up portion 42 is the part of the repair jig 40 adjacent to the insertion portion 41. The jack-up portion 42 also protrudes outward from the space 13a when the insertion portion 41 is inserted into the space 13a.

[0031] The reinforcing portion 43 protrudes upward from the jack-up portion 42. Also, when the insertion portion 41 is inserted into the space portion 13a, the reinforcing portion 43 comes into contact with the side surface of the lower beam 16 and the side surface of the upper beam 15.

[0032] The insertion section 41 and the jack-up section 42 are configured as a single component. The reinforcing section 43 is fixed to the upper part of the jack-up section 42 by welding.

[0033] The reinforcing section 43 may be detachably attached to the lower part, which has the insertion section 41 and the jack-up section 42 formed thereon, using fasteners such as bolts. In this case, multiple types of lower parts of different sizes and multiple types of reinforcing sections 43 of different lengths can be manufactured, and the optimal lower part and the optimal reinforcing section 43 can be combined according to the size of the truss 11 for each escalator.

[0034] Figure 11 is a perspective view showing the escalator in Figure 6 after the renovation work has begun. The existing fixing members 13 and existing intermediate support members 21 are positioned below each of the pair of lower beams 16, as shown in Figure 11. The following description will mainly focus on one side of the truss 11 in the width direction, but in reality, similar work is performed on both sides.

[0035] When the renovation begins, a jacking device 34 is installed next to the existing intermediate support 21 on the building frame 10. Subsequently, as shown in Figure 12, the renovation jig 40 is attached to the existing fixing member 13. That is, the insertion part 41 is inserted into the space 13a. At this time, the reinforcing part 43 is placed against the side of the lower beam 16 and the side of the upper beam 15.

[0036] Next, as shown in Figure 13, the jack-up section 42 is jacked up by the jacking device 34. As a result, the existing fixing member 13 is lifted away from the existing intermediate support 21, and the longitudinal middle section of the truss 11 is temporarily supported by the jacking device 34.

[0037] After temporary support is completed on both sides in the width direction of the truss 11, the existing intermediate support 21 is removed from beneath the existing fixing member 13, as shown in Figure 14. Even after the existing intermediate support 21 has been removed, the longitudinal middle section of the truss 11 is stably temporarily supported by each jacking device 34.

[0038] In this state, the newly installed fixing member 14 can be further fixed to the lower beam 16, or the newly installed intermediate support 31 can be installed on the building frame 10.

[0039] After the newly installed intermediate support 31 is in place, the repair jig 40 is lowered by the jacking device 34, and the newly installed fixing member 14 is placed on the newly installed intermediate support 31. Finally, the repair jig 40 and the jacking device 34 are removed.

[0040] Thus, the escalator repair method of Embodiment 1 includes a jig installation step, a jack-up step, a support removal step, an additional processing step, a support installation step, and a jig removal step.

[0041] The jig installation process involves inserting the insertion portion 41 of the repair jig 40 into the space 13a.

[0042] The jacking-up process involves arranging jacking devices 34 on the existing intermediate support 21 and lifting the jacking-up section 42 of the repair jig 40 with the jacking devices 34, thereby separating the existing fixing member 13 from the upper end of the existing intermediate support 21.

[0043] The support removal process involves removing the existing intermediate support 21 from beneath the existing fixing member 13.

[0044] The additional processing step involves fixing the newly installed fixing member 14 to the lower beam 16 through additional processing.

[0045] The support installation process involves installing a new intermediate support 31 beneath a newly installed fixing member 14.

[0046] The jig removal process involves lowering the repair jig 40 using the jacking device 34, placing the newly installed fixing member 14 on the newly installed intermediate support 31, and then removing the repair jig 40 and the jacking device 34.

[0047] This repair method and repair jig 40 allow for stable temporary support of the truss 11 and easy removal of the existing intermediate support 21. This enables the installation of the new intermediate support 31 in the same position as the existing intermediate support 21. Therefore, the repair work can be carried out stably while suppressing deformation of the truss 11. Furthermore, the newly installed intermediate support 31 allows for greater inter-story displacement.

[0048] Furthermore, since the truss 11 can be stably temporarily supported, deformation of the truss 11, damage to equipment inside the truss 11, and damage to the surrounding building finish can be suppressed.

[0049] Furthermore, there is no need to install a lifting device for the truss 11, such as a chain block, above the truss 11, thus minimizing the impact on parts of the building other than the structural frame 10. The structural frame 10 already had sufficient strength to temporarily support the truss 11 because it had previously supported the existing intermediate support 21, and no additional reinforcement is required.

[0050] Here, when the insertion part 41 is inserted into the space 13a, the jack-up part 42 protrudes from the space 13a to the outside of the truss 11. Therefore, the point of application of the jack-up load by the jacking device 34 is located outside the truss 11, beyond the center of gravity of the lower beam 16. As a result, a moment that twists the lower beam 16 is generated when jacking up.

[0051] In contrast, the repair jig 40 of Embodiment 1 is provided with a reinforcing portion 43. During the jig installation process, the reinforcing portion 43 is applied to the side surface of the lower beam 16 and the side surface of the upper beam 15.

[0052] Therefore, as shown by arrows A and B in Figure 15, the force originating from the twisting moment in the lower beam 16 is distributed to the upper beam 15, the reinforcing section 43, etc. This makes it possible to suppress the deformation of the lower beam 16.

[0053] Furthermore, if the lower beam 16 has sufficient strength, the reinforcing section 43 may be omitted.

[0054] Furthermore, the existing spacer 23 may be reused in the newly installed intermediate support 31.

[0055] Furthermore, the repair method and repair jig 40 of Embodiment 1 can also be applied to escalators where seismic reinforcement work has already been carried out, as shown in Figure 5, when replacing the newly installed intermediate support 31 or performing additional processing on the newly installed fixing member 14.

[0056] Furthermore, although an escalator was shown as the passenger conveyor in Embodiment 1, the passenger conveyor may also be a moving walkway. [Explanation of Symbols]

[0057] 11 Truss, 13 Existing fixing member, 13a Space, 15 Upper beam, 16 Lower beam, 21 Existing intermediate support, 34 Jacking device, 40 Repair jig, 41 Insertion part, 42 Jacking up part, 43 Reinforcement part.

Claims

1. A jig installation process involves inserting the insertion part of a repair jig into the space formed between a fixing member, which is mounted on an existing intermediate support that supports the longitudinal middle portion of the truss and is fixed to the lower part of the lower beam of the truss, and the lower beam. A jacking-up process in which the fixing member is separated from the upper end of the existing intermediate support by lifting the jacking-up portion of the repair jig using a jacking device installed alongside the existing intermediate support, and Support removal process: Removing the existing intermediate support from below the fixing member. A renovation method for passenger conveyors, including the following.

2. The repair jig has a reinforcing portion that protrudes upward from the jack-up portion, The method for repairing a passenger conveyor according to claim 1, wherein in the jig installation step, the reinforcing portion is applied to the side surface of the lower beam and the side surface of the upper beam in the truss.

3. An insertion part inserted into the space formed between the fixing member fixed to the lower part of the lower beam in the truss and the lower beam, A jack-up portion that protrudes from the insertion portion to the outside of the space when the insertion portion is inserted into the space, and is jacked up by a jacking device, and A reinforcing portion that protrudes upward from the jack-up portion and makes contact with the side surface of the lower beam and the side surface of the upper beam in the truss when the insertion portion is inserted into the space. A repair jig for a passenger conveyor equipped with [a specific feature / tool].

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