JP2500841Y2 - Scaffolding for work in elevator hoistway - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a scaffold for working in a hoistway of an elevator.

[Prior Art] Generally, a scaffolding for working in an elevator hoistway has a pair of right and left triangular shapes rotatably arranged on the hoistway floor as shown in Japanese Patent Publication No. 1-43112, for example. It has a frame and a scaffolding board installed between both left and right frames, and the scaffolding board is arranged horizontally when both frames are faced in the hoistway. It was overhanging in the hoistway and the work was done on it.

[Problems to be solved by the device]

The elevator hoistway and the landing are connected by an opening, but since the width of this opening is narrower than the width of the hoistway, the width of the work scaffold that can be projected from the landing into the hoistway is open. Therefore, a gap is formed between the side of the work scaffold overhanging in the hoistway and the inner wall of the hoistway. As a result, there is a risk of dropping from the gap, and there is a problem in that work near the side wall of the hoistway cannot be performed.

An object of the present invention is to provide a scaffolding for work in an elevator hoistway, which can safely perform work near a side wall of the hoistway.

[Means for solving the problem]

In order to achieve the above object, the present invention provides a hoistway working scaffolding for an elevator, comprising a support frame structure that is supported by an elevator landing opening and is installed so as to project from the landing opening. A fixed work floor installed on the upper surface of the framework and having a width dimension smaller than the width dimension of the landing opening, and formed on at least one side of the fixed work floor so as to be expandable in the width direction of the landing opening. And a movable work floor which is installed and can form a width dimension larger than the width dimension of the landing opening when the expansion is performed.

[Action]

Since the present invention is configured as described above, after the work scaffold is extended from the landing to the hoistway, the movable work floor is laterally overhanged to form the work floor up to the side wall of the hoistway. It is possible to substantially eliminate the gap between the side of the work scaffold and the inner wall of the hoistway, and it is possible to safely work near the side wall of the hoistway.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a side view showing an installed state of the working scaffold of the present invention, FIG. 2 is a plan view of the working scaffold of FIG. 1 seen from above,
FIG. 3 is a front view of the work scaffold of FIG. 1 as viewed from inside the hoistway.

In the figure, 1 is a hoistway of a hydraulic elevator, 2 is a hall,
Reference numeral 3 denotes an inner wall of the hoistway, and 5 denotes an opening formed in a wall between the hoistway 1 and the hall 2. A landing floor 4 is provided along the lower edge of the opening 5. Further, L-shaped support plates 6 are installed on both sides of the lower end of the opening 5, and columns 9 and brackets 7 are attached to the support plates 6, respectively. A frame 14 forming a part of a support frame assembly 15 is rotatably attached to each bracket 7 by a pin 8.
Here, the bracket 7 is arranged inside the column 9 at a position where it does not interfere with the rotation of the frame 14. Prop 9
A screw shaft 11 having an L-shaped washer 10 and a handle 12 for expanding and contracting the screw shaft 11 are provided at an upper end portion of the screw shaft 11. The left and right frames 14 are
It consists of a vertical arm 16, a horizontal arm 17, and a tilting arm 18, which are in the shape of a right triangle having the same shape as each other. The frame 14 is extended into the hoistway 1 and the horizontal arm 16 is placed in the vertical position. The dimensions of each part are set so that 17 takes a horizontal position. A connecting arm 1 connecting these frames between the right horizontal arm 17a and the left horizontal arm 17b.
At least two 9s are provided in parallel, and a ladder 24 for raising and lowering between the landing floor 4 and the work floor 20 is provided between the left and right frames 14. Frame 14, connecting arm
The support frame assembly 15 is configured by the ladder ladder 24 and the ladder 24. A work floor 20 is installed above the left and right horizontal arms 17 to form a work scaffold 30. The work floor 20 is fixed between the left and right frames, and is connected to the left and right of the fixed work floor 21 by hinges 22 and the fixed work floor 21 having a width smaller than the width of the opening 5, respectively. Of the movable work floors 23a and 23b, which can be formed to have a width dimension larger than the width dimension of the opening 5 at the time of the expansion. Here, the frame 14, the connecting arm 19, the work floor 20, and the ladder 24 are connected to each other by the fixing bolts 25, and when dismantled and transported, they are separated from each other to facilitate transportation.

Next, a procedure for assembling the work scaffolding configured as described above will be described.

First, the support plates 6 are arranged at preset positions at both ends of the lower portion of the opening 5, and the columns 9 are set up.
Next, the handle 12 is operated to extend the screw shaft 11 until the contact washer 10 hits the opening upper wall 3c, and the support plate 6 and the pillar 9 are firmly supported by the opening upper wall 3c and the landing floor 4. . Next, the left and right frames 14 are fixed to the respective brackets 7 by the pins 8, and then the connecting arms 1
9. Assemble work floor 20, ladder 24 respectively.

All of the above assembling work is carried out at the position of the chain double-dashed line in FIG. 1 at the landing 2. After assembly, the pin 8 is pivoted to move from the landing 2 through the opening 5 to the position of the solid line in the drawing in the hoistway 1. Overhang. Through holes 13 are provided in the support column 9 and the supporting frame assembly 15 so that the hole positions are aligned when the work floor 20 is located at the horizontal position. The fixing pin 26 is passed through the through holes 13 to perform the work. Secure scaffolding 30.

Here, FIG. 2 is a plan view of the work scaffold 30 overhanging in the hoistway 1 as seen from above. However, since the work scaffold 30 overhangs through the opening, the width of the work floor is It is within the range of the width of the opening 5. Part of the work in the hoistway 1 is the installation work of the rails 27a and 27b, and the work requires a space indicated by a chain double-dashed line, which creates a gap 28 on the side of the work scaffold 30. Become. The work floor 20 is expanded to the position indicated by the alternate long and two short dashes line because the work is inefficient as it is and it is dangerous.

FIG. 3 is a front view showing a state in which the work scaffold 30 is extended in the hoistway 1 as viewed from the inside of the hoistway. By unfolding the movable work floors 23a and 23b in the folded state to the left and right with the hinges 22, the left and right rails 27 and the hoistway inner wall 3 are formed.
The gap between and is reduced. As a result, the work efficiency can be improved, and at the same time, it is possible to prevent an accident such as the fall of a worker from the gap, and to ensure the safety.

In this embodiment, the movable work floors 23 are provided on the left and right of the fixed work floor 21, but it is possible to provide the movable work floors 23 only on one side depending on the work site.

[Effect of device]

Since the present invention is configured as described above, it is possible to substantially eliminate the gap between the side of the work scaffold and the inner wall of the hoistway during work in the hoistway, and thus work near the side wall of the hoistway. There is an effect that the work can be performed safely and the work efficiency can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing an installed state of a work scaffold of the present invention,
2 is a plan view of the work scaffold of FIG. 1 seen from above, FIG.
The figure is a front view of the work scaffold of FIG. 1 as seen from inside the hoistway. 1 …… hoistway, 2 …… landing, 15 …… supporting frame, 21 ……
Fixed work floor, 23 …… Movable work floor, 30 …… Working scaffolding.

Claims (1)

(57) [Scope of utility model registration request] 1. An elevator hoistway working scaffolding supported by an elevator landing opening and installed in a state of overhanging from the landing opening, the working frame being installed on an upper surface of the supporting frame assembly. And a fixed work floor having a width dimension smaller than the width dimension of the landing opening, and is formed on at least one side of the fixed work floor and installed so as to be expandable in the width direction of the landing opening. A scaffolding for working in an elevator hoistway, comprising a movable work floor capable of forming a width dimension larger than the width dimension of the landing opening.