JP2012030927A - Fall protection method of elevator shaft - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily attain protection for fall prevention when a frame 1 is assembled on a car E1 to perform asbestos removing operation.SOLUTION: In the frame 1 installed on the car E1 while being surrounded by a vertical frame 2 and a horizontal frame 3, protruding portions 3pa, 3pb are provided protruding outward beyond the vertical frame 2, and bars 11 of a fall protection tool 10 constituted by arranging the bars 11 in parallel and laying a protection material 12 between the bars are erected so as to cross the protruding portions 3pa, 3pb, whereby the fall protection of a clearance between the car E1 and an elevator shaft wall E6 is performed by the fall protection tool 10.

Description

  Techniques related to elevator maintenance and repair are disclosed below.

  In buildings such as commercial buildings, asbestos has been sprayed on the walls and steel frames in elevator hoistways for the purpose of improving fire resistance. Then, the asbestos removal in a hoistway is implemented using the technique disclosed by patent document 1. FIG. The covering material removal method of Patent Document 1 is a method in which a frame is assembled on a car, a hoistway wall surface is cured with a transparent cover using the frame, and asbestos is scraped off in the cured cover. The frame is composed of a vertical frame standing on the car and a horizontal frame spanning the vertical frame, and functions as a scaffold during work and a fall prevention fence for workers.

JP 2009-113986 A

  As can be seen from the drawings of Patent Document 1, generally, there is a gap between the elevator car wall on the side and rear side of the elevator car, from which tools and the like can fall. Therefore, as described above, when asbestos removal work is performed with a frame assembled on a car, curing for preventing fall is necessary.

The drop curing method of the elevator hoistway proposed for the above problem is
In the frame assembled by the vertical frame and the horizontal frame and installed on the car, a protruding portion that protrudes outward from the vertical frame is provided,
By placing the rod body of the drop curing tool configured by arranging at least two rod bodies in parallel and stretching a curing material between the rod bodies, crossing the projecting portion,
It is a drop curing method in which the gap between the car and the hoistway wall is dropped and cured with the drop curing tool.

  According to the elevator hoistway drop curing method according to the above proposal, the drop curing can be easily performed with respect to the gap between the car and the hoistway wall with the use of a drop curing tool that can be reused.

The figure in the hoistway which shows the state which assembled the frame on the cage | basket | car and seeed the state which installed the fall curing tool from the side. The figure in the hoistway shown from the upper side about the horizontal frame and fall curing device of the lowest layer of the flame | frame shown in FIG. The perspective view of the fall curing device which concerns on embodiment.

As an example, FIGS. 1 and 2 show a frame assembled on an elevator car in the asbestos removal work disclosed in Patent Document 1. FIG.
As is well known, the elevator car E1 moves up and down by being guided by a guide rail E3 extending left and right so as to sandwich the car E1 in the vertical hoistway E2. The car E1 is disposed in the hoistway E2 so as to be close to the entrance E4 on the front side, and a guide rail E5 for guiding a counterweight (not shown) is extended on the rear side. Accordingly, in the hoistway E2, the gap between the car E1 and the hoistway wall E6 is wide on the left and right sides and the rear side of the car E1.

  The frame 1 has four vertical frames 2 erected on the car E1 so as to form a quadrangular apex when viewed from above, and the vertical frame 2 is installed in a cross beam across the vertical frame 2 in the front-rear and left-right directions. The horizontal frame 3 is used to function as a scaffold for work and a fall prevention fence for workers. The vertical frame 2 is erected at a height corresponding to the first floor of the building, and a plurality of horizontal frames 3 serving as a scaffold are assembled to the vertical frame 2. The vertical frame 2 and the horizontal frame 3 using the scaffold tube are assembled to each other via a scaffold clamp (orthogonal clamp or universal clamp) 4.

  In the frame 1 of the present embodiment, the lowermost horizontal frames 3fa and 3fb for forming a scaffold floor are assembled as follows, unlike the other horizontal frames 3.

  First, the horizontal frame 3fa extending in the front-rear direction is assembled by the scaffold clamp 4 to the adjustment jack 2a attached to the lower end portion of the vertical frame 2. By having the adjustment jack 2a, the height of each vertical frame 2 can be adjusted. The horizontal frame 3fa is longer than the other horizontal frames 3, and the front end thereof is in contact with the front hoistway wall E6 by the contact plate. On the other hand, the rear side of the horizontal frame 3fa exists as an extended portion extended further from the vertical frame 2 toward the elevating wall E6, and a protruding portion 3pa protruding outward from the vertical frame 2 is formed. And the extension jack 3fc is attached to the end part of the rear side extension part of the horizontal frame 3fa which is the tip of the projection part 3pa, and the extension jack 3fc comes into contact with and presses against the hoistway wall E6. The lateral frame 3fa is arranged in the hoistway E2 like a tension bar by the pressing of the tension jack 3fc.

  Note that it is preferable to use the pushing force of the pushing jack 3fc so as to support the dropping curing tool described later and to receive the load of the falling object, but the pushing jack 3fc is not necessarily provided. It does n’t mean you have to. In addition to using the extended portion of the horizontal frame 3 as the protruding portion 3pa, a separate bracket can be fixed to the vertical frame 2 to form the protruding portion. Considering the cost, it is excellent to use the long horizontal frame 3fa as in this embodiment.

  An underfloor jack 3fd is assembled by a scaffold clamp 4 to the horizontal frame 3fa extending in the front-rear direction. The underfloor jack 3fd is placed on the ceiling of the car E1 to support the frame 1. However, since the frame 1 of this embodiment is supported by the guide rails E3 and E5 as described below, the underfloor jack 3fd is It can be unnecessary. A scaffolding floor 3fe is also placed on the horizontal frame 3fa as indicated by a dotted line, and functions as a work floor.

  Next, the horizontal frame 3fb extending in the left-right direction is assembled by the scaffold clamp 4 below the horizontal frame 3fa in the front-rear direction. The horizontal frame 3fb is fixed to the guide rail bracket 3ff via the scaffold clamp 4. The guide rail bracket 3ff is a bracket equivalent to that disclosed in FIGS. 17 to 19 of Patent Document 1, and is fixed to the guide rails E3 and E5 to support the frame 1 and a load during operation. By supporting the load using the guide rails E3 and E5, the load is concentrated on the ceiling of the car E1.

  The horizontal frame 3 fb extending in the left-right direction is also longer than the other horizontal frames 3, and there are extended portions extending from the vertical frame 2 toward the elevating wall E <b> 6 on both the left and right sides, and protrudes outward from the vertical frame 2. Protrusions 3pb are formed respectively. The left end (or right end) of the horizontal frame 3fb is in contact with the left hoistway wall E6 by the contact plate. Further, a thrust jack 3fc is attached to the end of the right (or left) extension portion of the horizontal frame 3fb, that is, the tip of the protrusion 3pb, and the thrust jack 3fc comes into contact with and presses against the hoistway wall E6. The horizontal frame 3fb is also arranged in the hoistway E2 like a tension bar by the pressing of the tension jack 3fc, and supports a drop curing tool described later.

  As described above, in the frame 1 assembled by the vertical frame 2 and the horizontal frame 3 and installed on the car E1, the protrusion 3pa in the front-rear direction and the protrusion in the left-right direction protrude outward from the vertical frame 2. The drop curing tool 10 is placed on the part 3pb (it may be just placed, but it may be bound). As shown in detail in FIG. 3A, the drop curing tool 10 includes a stretcher including two bars 11 arranged in parallel and a curing material 12 stretched between the two bars 11. It is a type. The rod body 11 is a metal, wooden, or resin cylinder or prism, and preferably has a length corresponding to the diameter of the hoistway E2 in the front-rear direction or the left-right direction, and the rod body 11 has protrusions 3pa, 3pb. It is built to cross. Two rods 11 may be provided, but three or more rods 11 may be arranged in parallel to improve load bearing performance. The curing material 12 is a flexible material net, cloth, resin sheet or the like, and considering that it does not bounce fallen objects, a net is suitable. In this manner, the drop curing tool 10 configured by arranging the two rod bodies 11 in parallel and stretching the curing material 12 between the rod bodies 11 can freely change the width between the two rod bodies 11. Therefore, it can be used both in the front-rear direction and in the left-right direction in the hoistway E2.

  FIG. 3B shows a modified example of the drop curing tool 10 in which an extended curing material 13 that hangs down from one (or both) of the rods 11 is formed. A cut 13a is formed in the extended curing material 13 so that it can be avoided if there is an obstacle during installation. As shown by the dotted line in FIG. 1, the extended curing material 13 is hung from the drop curing tool 10 installed on the projecting portion 3pa and is bound to the horizontal frame 3fb or the underfloor jack 3fd, thereby being near the floor of the frame 1. The fallen object that can fall from can be received. Similarly, the drop curing tool 10 having the extended curing material 13 can be applied to the left and right protruding portions 3pb.

  As shown in FIG. 2, the drop curing tool 10 is placed on the protrusion 3pa on the rear side of the frame 1 and extends in the left-right direction on the rear side of the car E1, thereby curing the gap on the rear side of the car E1. The drop curing tool 10 is placed on the left and right protrusions 3pb of the frame 1 and extends in the front-rear direction on both the left and right sides of the car E1, thereby curing the gap on the left and right sides of the car E1.

  In the case of FIG. 2, the end of the drop curing tool 10 that drops and cures the left and right sides of the car E <b> 1 is not overlapped with the end of the drop curing tool 10 that drops and cures the rear side of the car E <b> 1. Can be bound together.

  The drop curing tool 10 of the present embodiment can be easily dropped and cured with respect to the gap between the car E1 and the hoistway wall E6 only by being placed on the protrusions 3pa and 3pb of the frame 1. Since it only has to be placed, it can be easily removed and reused for each floor when moving to the next floor work after one floor work.

1 Frame 2 Vertical frame 3, 3fa, 3fb Horizontal frame 3fc Jack 3pa, 3pb Protruding part (extension part)
DESCRIPTION OF SYMBOLS 10 Fall curing tool 11 Rod 12 Curing material 13 Extended curing material E1 Car E2 Hoistway E3, E5 Guide rail E4 Entrance / exit E6 Hoistway wall

Claims (5)

In the frame assembled by the vertical frame and the horizontal frame and installed on the car, a protruding portion that protrudes outward from the vertical frame is provided,
By placing the rod body of the drop curing tool configured by arranging at least two rod bodies in parallel and stretching a curing material between the rod bodies, crossing the projecting portion,
A drop curing method for an elevator hoistway, wherein the gap between the car and the hoistway wall is dropped and cured by the drop curing tool.   The drop curing method according to claim 1, wherein the protruding portion of the frame is an extended portion of the horizontal frame.   The drop curing method according to claim 2, wherein a jack that abuts and presses against the hoistway wall is attached to an end of the extended portion of the horizontal frame. A drop curing tool used in the drop curing method according to claim 1,
A drop curing tool comprising at least two bars arranged in parallel and a curing material stretched between the bars.   The drop curing tool according to claim 4, wherein an extended curing material hanging from at least one of the rods is formed.