JP2018158781A - Portal lifting device used in renewal construction method for passenger conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portal lifting device used in a renewal construction method whereby a new truss segment can be temporarily placed.SOLUTION: A portal lifting device 20 according to the present invention is used in a renewal construction method for a passenger conveyor, and includes a plurality of support post frames 22 erected on the left and right frame members 14 of an existing truss 10. The support post frames include at least two pairs of opposite support post frames 23a, 23b, left and right. Between each pair of support post frames, a frame 40 for temporary placing a new truss segment is suspended so as to be detachable.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a portal lifting device used for lifting a truss segment or the like in a construction method for renewing a passenger conveyor such as an escalator, and more specifically, a portal type capable of temporarily placing a newly installed truss segment during transportation It relates to a lifting device.

  In the escalator, a renewal construction method has been proposed in which a new truss is installed in the internal space of the existing truss without removing the existing truss, and the new truss is combined with the existing truss (Patent Document 1). According to this renewal method, it is possible to greatly shorten the renewal period of the escalator.

  In the renewal method of Patent Document 1, parts and equipment (driving device, step, handrail drive mechanism, control equipment, etc.) other than the existing truss are removed, and only the existing truss is left. And a gate type lifting device is provided in the upper floor side horizontal part and lower floor side horizontal part of an existing truss, respectively.

  The new truss is divided into a plurality of truss segments, and the new truss segment is lifted by a gate-type lifting device, sequentially transported to the upper floor side or the lower floor side, and installed on the existing truss.

JP-A-2015-809

  It is necessary to temporarily place the new truss segment on the floor near the site after the new truss segment is carried on site until it is installed on the existing truss. However, if there are obstacles such as fire doors, fire shutters, and ticket gates nearby, it will be difficult to secure temporary storage space. On the other hand, delaying the carry-in until just before installation leads to a reduction in work efficiency.

  An object of the present invention is to provide a portal lifting device used in a renewal method capable of temporarily placing a newly installed truss segment.

The portal lifting device according to the present invention is
It is a portal type lifting device that is used in the renewal construction method for passenger conveyors and has a plurality of support frames that are erected on the left and right frame members of the existing truss,
The strut frame comprises at least two strut frame pairs facing each other on the left and right,
Temporary frames for the newly installed truss segments are detachably suspended between the support frame pairs.

  The temporary placement frame has a substantially L-shaped cross section, and can be arranged so that one side faces upward.

  The new truss segment is preferably formed with a recess into which the one side of the temporary frame is fitted.

  The temporary placement frame has a substantially U-shaped cross section, and can be arranged so that the groove faces upward.

  According to the portal lifting device used in the renewal method of the passenger conveyor according to the present invention, the temporary placement frame can be attached to and detached from the support frame pair. Then, the newly installed truss segment is temporarily placed on the temporary placement frame. Accordingly, it is not necessary to place the newly installed truss segment on the floor near the site, and since it does not obstruct traffic, the newly installed truss segment can be loaded in advance, and work efficiency can be improved. There is also an advantage that the work can be performed under the newly installed truss segment temporarily placed.

  According to the present invention, the newly installed truss segment can be temporarily placed in the portal lifting device with a simple configuration in which a temporary placement frame is attached.

FIG. 1 is a perspective view showing an embodiment of an existing truss in the renewal method. 2A and 2B are perspective views showing an example of a newly-installed truss segment, in which FIG. 2A is an enlarged view of a front leg frame, and FIG. 2B is an enlarged view of a rear leg frame. FIG. 3 is an enlarged view showing an engaged state between the front leg frame and the temporary placement frame. FIG. 4 is an enlarged view showing an engaged state of the rear leg frame and the temporary placement frame. FIG. 5 is a perspective view showing a state where a newly installed truss segment is temporarily placed on an existing truss using a temporarily placing frame. FIG. 6 is a side view of another embodiment showing the engaged state of the front leg frame and the temporary placement frame. FIG. 7 is a side view of another embodiment showing an engaged state between the front leg frame and the temporary placement frame.

  Hereinafter, it demonstrates concretely along drawing about the form which implemented this invention to the renewal construction method of an escalator as a passenger conveyor. In the following description, the direction from the lower floor to the upper floor along the longitudinal direction of the existing truss 10 is referred to as “front”, and the opposite direction is referred to as “rear”.

  The renewal method of the escalator which is one embodiment of the present invention is a method of installing a truss segment of a new truss in the internal space without removing the existing truss 10. FIG. 1 is a perspective view of the existing truss 10 after removing the internal mechanism, and shows only the vicinity of the upper floor side. The existing truss 10 includes an upper floor side horizontal portion 11, an inclined portion 12, and a lower floor side horizontal portion (not shown). These have upper floor side frame members 14, 14, inclined part frame members 15, 15 and lower floor side frame members (not shown) on the left and right, respectively, and upper floor side frame members 14, 14 and the lower floor side The gate type lifting device 20 is installed in each frame member. In the illustrated embodiment, the column frames 30 of the portal lifting device 20 are all disposed on the upper floor side frame members 14, 14, but a part thereof is installed on the inclined portion frame members 15, 15. You can also.

  The portal lifting device 20 is installed on the frame members 14 and 14 of the existing truss 10. The portal lifting device 20 includes, for example, a column frame 22 erected from the frame members 14, 14, a beam frame 24 connected to the column frame 22 in the front-rear and left-right directions, and a beam frame 24 extending in the left-right direction. It has a central frame 26 suspended back and forth. Each of the frames 22, 24, and 26 can employ steel materials such as H-shaped steel, I-shaped steel, angle steel, groove-shaped steel, and Z-shaped steel, and are assembled on the frame members 14 and 14 by bolting or the like.

  The support frame 22 is installed such that at least two pairs face the frame members 14 and 14 on the left and right. In the drawing, all the support frame frames 22 are installed so as to be paired on the left and right, but if the pair 23a of the center support frame and the pair 23b of the rear support frame related to the present embodiment are opposed to each other on the left and right, respectively. Good.

  The center frame 26 is provided with a rail (not shown) that allows the chain block to slide back and forth on the lower surface, and the new truss segment 30 and the like are lifted from the lower floor side to the upper floor side by the chain block, or the upper floor side. It is intended to hang from the floor to the lower floor.

  FIG. 2 is a perspective view showing an embodiment of the new truss segment 30. In the present embodiment, the truss segment 31 installed on the existing truss 10 and the transport carriage 32 for transporting the truss segment 31 are referred to as a new truss segment 30. The transport carriage 32 is not necessary. In this case, a frame corresponding to the leg frames 33 and 36 described below may be attached to the truss segment 31 by bolting or the like.

  The newly installed truss segment 30, in the illustrated embodiment, can be constructed from a frame such as an L-shaped angle member. The frame has a shape in which a truss segment 31 to be mounted is fixed with a bolt or the like and is stable. The frame is not limited to the L-shaped equilateral angle, and may be configured by an L-shaped angle, a square steel pipe, an I-shaped steel, an H-shaped steel, a grooved steel, a bar-shaped steel, a plate-shaped steel, or a combination thereof. .

  The carriage 32 has a pair of left and right front leg frames 33, 33 on the front side and a pair of left and right rear leg frames 36, 36 on the rear side. The leg frames 33 and 36 are formed so as to protrude downward in order to prevent bottom rubbing and interference with the existing truss 10 and the like.

  In the illustrated embodiment, as shown in an enlarged view in FIGS. 2A and 2B, the leg frames 33 and 36 are formed with recesses 34 and 37 that open downward, respectively. These recesses 34 and 37 are used for engagement with a temporary placement frame 40 to be described later, and when the new truss segment 30 is transported using the step chain of the existing truss 10, the recesses 34 and 37 are stepped. Can be used to fit on the axle of the chain.

  The leg frames 33 and 36 are each provided with a stopper 38 projecting from the vicinity of the lower end toward the left and right outer sides. The stopper 38 prevents the truss segment 31 and the carriage 32 from coming into contact with the existing truss 10 by preventing the new truss segment 30 from swinging when the new truss segment 30 is pulled up or pulled down in the existing truss 10. .

  The new truss segment 30 having the above-described configuration is carried into the existing truss 10 and pulled up or pulled down by the existing truss 10 using the portal lifting device 20. In the present invention, after the new truss segment 30 is carried into the site, the new truss segment 30 can be temporarily placed on the portal lifting device 20 until it is installed in the existing truss 10.

  Specifically, as shown in FIG. 1, in order to temporarily place the new truss segment 30 on the portal lifting device 20, a temporary placement frame 40 is suspended on the support frame pairs 23 a and 23 b. The temporary placement frame 40 can be attached to and detached from the support frame 22 of the support frame pairs 23a and 23b by bolting or the like, and can be removed so as not to obstruct work when unnecessary.

  In the embodiment of FIGS. 1, 3, and 4, the temporary placement frame 40 has an L-shaped equilateral angle with a substantially L-shaped cross section, and as shown in FIGS. 3 and 4, one side 42 faces upward. Is arranged.

  Then, in the state where the newly installed truss segment 30 is lifted in the portal lifting device 20, the temporary placement frame 40 is disposed on the support frame pairs 23a and 23b as shown in FIG. 1, and the temporary placement frame 40 and the leg frame are arranged. 33 and 36 are aligned and the new truss segment 30 is lowered. As a result, as shown in FIGS. 3 to 5, the newly installed truss segment 30 can be temporarily placed in the portal lifting device 20 with the leg frames 33 and 36 placed on the temporary placement frame 40.

  As shown in FIGS. 3 and 4, in this embodiment, recesses 34 and 37 are formed at the lower ends of the leg frames 33 and 36. Accordingly, the recesses 34 and 37 are engaged with the upward side 42 of the temporary placement frame 40 having an L-shaped equilateral angle, and the lower ends of the leg frames 33 and 36 are brought into contact with the horizontal side 43, thereby the leg frame. 33 and 36 can be placed stably without being displaced forward and backward.

  As described above, according to the present invention, the new truss segment 30 can be temporarily placed with a simple configuration in which the temporary placement frame 40 is simply attached to the support frame 22 of the portal lifting device 20.

  In addition, according to the present invention, as shown in FIG. 5, the newly installed truss segment 30 can be temporarily placed on the temporary placement frame 40, so that the newly installed truss segment 30 can be temporarily placed on the floor near the site. Since it is not necessary to temporarily place it in the storage space, it is not necessary to secure the temporary storage space, and passage is not hindered by temporary storage. Furthermore, since the work can be performed under the newly installed truss segment 30 that is temporarily placed, the work is not interrupted by the temporary placement. In addition, since the new truss segment 30 can be temporarily placed, it is not necessary to delay the loading of the new truss segment 30 until just before installation, and work delays can be prevented.

  When the installation work of the truss segment progresses and the temporary placement of the new truss segment 30 becomes unnecessary, the new truss segment 30 is lifted, the leg frames 33 and 36 are lifted from the temporary placement frame 40, and the temporary placement frame 40 is moved to the support frame. What is necessary is just to remove from 22.

  The above description is for explaining the present invention, and should not be construed as limiting the invention described in the claims or limiting the scope thereof. Further, the configuration of each part of the present invention is not limited to the above-described embodiment, and various modifications can be made within the technical scope described in the claims.

  The shapes and configurations of the portal lifting device 20, the newly installed truss segment 30, and the temporary placement frame 40 are not limited to the above-described embodiments. For example, the form of engagement between the leg frame 33 (36) and the temporary placement frame 40 can be modified as follows.

  FIG. 6 is an embodiment in which a leg frame 33 (36) is placed on a horizontal side 43 of a temporary placement frame 40 having an L-shaped equilateral angle. If the leg frame 33 has no recess, the leg frame 33 may be placed directly on the horizontal side 43 of the temporary placement frame 40. Of course, even the leg frame 33 formed with the recess 34 shown in FIG. 2 may be placed as shown in FIG.

  FIG. 7 shows an embodiment in which a leg frame 33 (36) is mounted on a temporary placement frame 40 made of channel steel having a substantially U-shaped cross section. The grooved steel is disposed so that the groove 45 faces upward, and can be placed so that the leg frame 33 fits into the groove 45.

  In each of the above embodiments, the leg frames 33 and 36 of the newly installed truss segment 30 are placed on the temporary placement frame 40, but other frames and the like of the newly installed truss segment 30 are placed on the temporary placement frame 40. It may be placed.

  Further, when the distance between the leg frames 33 and 36 of the newly installed truss segment 30 does not match the distance between the temporary placement frames 40, an additional frame is placed between the front and rear temporary placement frames 40 and 40 and temporarily placed. You can also.

10 Existing truss 20 Gate type lifting device 22 Prop frame 23a Prop frame pair (front)
23b Pair of prop frames (rear)
30 New truss segment 31 Truss segment 32 Carriage cart 33 Leg frame (front)
36 Leg frame (rear)
40 Temporary frame

Claims (4)

It is a portal type lifting device that is used in the renewal construction method for passenger conveyors and has a plurality of support frames that are erected on the left and right frame members of the existing truss,
The strut frame comprises at least two strut frame pairs facing each other on the left and right,
A temporary frame for the newly installed truss segment is detachably suspended between the support frame pairs.
A portal lifting device used in the renewal method for passenger conveyors. The temporary placement frame has a substantially L-shaped cross section, and is arranged so that one side faces upward.
The portal lifting apparatus according to claim 1. The new truss segment has a recess into which the one side of the temporary frame is fitted.
The portal lifting device according to claim 2. The temporary placement frame has a substantially U-shaped cross section and is arranged so that the groove faces upward.
The portal lifting apparatus according to claim 1.

Images