JP2022011050A - Jamb fixing device and jamb fixing method for elevator - Google Patents

Abstract

To facilitate installation of a jamb, without welding and even in a narrow limited space.SOLUTION: A jamb fixing device 14 is composed of: a first L-shaped metal fitting 15 having a long-plate portion mounted on a side wall surface 11 of an opening, and a short-plate portion perpendicular to the long-plate portion; and a second L-shaped metal fitting 16 having a long-plate portion mounted on a rear surface of a vertical frame 12, and a short-plate portion perpendicular to the long-plate portion. A long hole extending in leftward and rightward directions of a frame opening is formed in each of the short-plate portions of the first L-shaped metal fitting 15 and the second L-shaped metal fitting 16, and, with the short-plate portions overlapped, the short-plate portions are fastened by connecting bolts 27, 28 inserted in the long holes. A long hole extending in forward and backward directions of the frame opening is formed in the long-plate portion of the second L-shaped metal fitting 16, and the vertical frame 12 and the long-plate portion of the second L-shaped metal fitting 16 are fastened by a vertical-frame fixing bolt 32 that can be engaged with the vertical frame 12 by its being inserted in the long hole extending in the forward and backward directions.SELECTED DRAWING: Figure 1

Description

An embodiment of the present invention relates to an elevator three-way frame fixing device and a three-way frame installation method.

At the elevator platform, the entrance / exit opening is composed of a three-sided frame consisting of a vertical frame and a horizontal frame. When installing a three-sided frame in the opening of a building, it is often the case that the three-sided frame is welded and fixed to the opening using reinforcing bars or the like. When welding, it is necessary to adjust the left-right position and front-back position of the three-sided frame.

Normally, even in the same building, the skeleton conditions are different for each floor. The installation of the three-sided frame is performed according to the reference point common to all floors, but the fact that the skeleton conditions are different for each floor means that the positional relationship between the side wall surface of the opening and the three-sided frame on each floor That's why you have to make adjustments. For example, it may be necessary to make adjustments of about ± 15 mm in both the left-right direction and the front-back direction.
Such position adjustment had to be performed at the same time as the welding work, high technology was required for the installation of the three-sided frame, and a lot of work time was required to perform the floors on all floors.

Therefore, in recent years, fixing metal fittings that can simultaneously adjust and fix the position of the three-sided frame without welding have been proposed (Patent Documents 1 and 2).
These fixing metal fittings are attached between the vertical frame of the three-sided frame and the wall surface of the skeleton opening, and are metal fittings having a specific structure having position adjustment and fixing functions.

Japanese Unexamined Patent Publication No. 2014-69966 Japanese Patent No. 5812750

However, when installing the three-sided frame using only the fixing brackets without welding, it may not be possible depending on the skeleton conditions of the building.
For example, there is a gap between the vertical frame of the three-sided frame and the side wall surface of the skeleton opening, and the fixing bracket is arranged in the gap, but if the gap is narrow, the fixing bracket cannot be used.

Further, depending on the fixing bracket, the bracket and bolts may be projected on the landing side, and this structure has a problem that the three-sided frame is greatly restricted in terms of design.

In addition, the fixing brackets may affect the finished wall on the landing side, and the finished wall is outside the control of the elevator construction contractor, and the finished wall cannot be adjusted and managed. Had to be welded.

The present invention has been made in view of the problems of the prior art, and is an elevator that enables easy installation work of a three-sided frame without welding and even in a narrow and limited space. It is an object of the present invention to provide a three-way frame fixing device and a three-way frame installation method.

In order to achieve the above object, the three-sided frame fixing device according to the embodiment of the present invention is
It is a three-sided frame fixing device used to fix a three-sided frame consisting of a vertical frame and a horizontal frame to the skeleton opening of the elevator landing.
A first L-shaped metal fitting having a first wall surface side plate portion attached to the side wall surface of the opening and a first three-sided frame short plate portion perpendicular to the long plate portion.
A second L-shaped metal fitting having a second three-sided frame side plate portion attached to the back surface of the vertical frame and a second wall surface side plate portion perpendicular to the second three-sided frame side plate portion is provided.
An elongated hole extending in the left-right direction of the skeleton opening is formed in the first three-sided frame side plate portion and the second wall surface side plate portion, and the first three-sided frame side plate portion and the second wall surface side plate portion are overlapped with each other. In this state, the first three-sided frame side plate portion and the second wall surface side plate portion are fastened by the connecting bolt inserted into the elongated hole.
An elongated hole extending in the front-rear direction of the skeleton opening is formed in the second three-way frame side plate portion, and the vertical frame and the second three-way frame side plate portion are inserted into the elongated hole extending in the front-rear direction. It is characterized in that it is fastened by a vertical frame fixing bolt that can be engaged with the vertical frame.

It is a figure which shows the entrance / exit of the elevator to which the three-way frame fixing device according to the embodiment of this invention is applied from the front. FIG. 3 is a cross-sectional view taken along the line BB in FIG. It is an exploded perspective view which shows the component of the three-way frame fixing device by this embodiment. FIG. 4A is a view showing a three-way frame fixing device temporarily fixed to the side wall surface of the skeleton opening, and FIG. 4A is an enlarged view of the three-way frame fixing device of FIG. 4A. 5 (A) is a diagram illustrating an operation of engaging the vertical frame on the right side when viewed from the hoistway side of the three-way frame with the three-way frame fixing device, and FIG. 5 (B) is a diagram for fixing the three-way frame of FIG. 5 (A). An enlarged view of the device, FIG. 5C, is an enlarged view showing a three-way frame fixing device engaged with a vertical frame. It is a perspective view which shows the modification of the vertical frame. It is a figure explaining how to adjust the position of a three-sided frame in the front-rear direction. It is a figure explaining how to adjust the position of a three-sided frame in the left-right direction, and FIG. 8B is a plan view of the vertical frame and the three-sided frame fixing device shown in FIG. Is. 9A (a) is a side view showing the attachment of the three-way frame fixing device when the width of the vertical frame and the side wall surface is narrow, and FIG. 9A (b) is a view showing a three-way frame fixing device according to a modification of the present invention. , It is a perspective view which shows the three-way frame fixing device when the width of a vertical frame and a side wall surface is narrow. 9B (a) is a side view showing the attachment of the three-way frame fixing device when the width of the vertical frame and the side wall surface is wide, and FIG. 9B (b) is a view showing a three-way frame fixing device according to a modification of the present invention. , It is a perspective view which shows the three-way frame fixing device when the width of a vertical frame and a side wall surface is wide.

Hereinafter, embodiments of the three-way frame fixing device and the three-way frame installation method of the elevator according to the present invention will be described with reference to the attached drawings.
FIG. 1 is a front view showing the entrance / exit of an elevator to which the three-sided frame fixing device according to the embodiment of the present invention is applied. FIG. 2 is a cross-sectional view taken along the line BB in FIG.
In FIG. 1, reference number 1 indicates the wall of the elevator landing. The wall 1 of the elevator landing is provided with an opening for an entrance / exit, and a three-sided frame 10 is installed in this opening. The three-sided frame 10 is composed of vertical frames 12 and 12 and a horizontal frame 13 spanning the upper end thereof. A three-way frame fixing device 14 is used for installing the three-way frame 10. FIG. 1B is an enlarged view showing the three-way frame fixing device 14 in FIG. 1A.
Here, the directions at the entrance and exit of the elevator landing are defined as follows in the vertical direction, the horizontal direction, and the front-rear direction. The vertical direction is the direction in which the car moves up and down. The left-right direction is the left-right direction when viewed from the entrance / exit of the landing toward the hoistway. In the front-back direction, the one closer to the entrance / exit of the landing is the front, and the opposite depth side is the back.

The three-way frame fixing device 14 is a device that enables the three-way frame 10 to be installed while adjusting the positions of the three-way frame 10 in the front-rear direction and the left-right direction. The three-way frame fixing device 14 is arranged in the gap formed between the side wall surface 11 of the skeleton opening and the vertical frames 12, 12, and the position adjustment is based on the reference points 100L and 100R set on the hoistway side in FIG. Then, the vertical frames 12 and 12 are adjusted in the left-right direction and the front-back direction, respectively. 20 is the threshold on the landing side.

As shown in FIG. 1 (A), the three-way frame fixing device 14 is arranged at three locations as an example in the left and right vertical frames 12 and 12, respectively. FIG. 1B shows one of the three-sided frame fixing devices 14, but the other three-sided frame fixing device 14 has the same configuration.

Next, the configuration of the three-way frame fixing device 14 will be described with reference to FIG.
FIG. 3 is an exploded perspective view showing the components of the three-sided frame fixing device 14 according to the present embodiment.

The three-sided frame fixing device 14 is configured by combining two L-shaped metal fittings made of a metal plate bent at a right angle, that is, a first L-shaped metal fitting 15 and a second L-shaped metal fitting 16. The first L-shaped metal fitting 15 is a metal fitting that is fastened and fixed to the side wall surface 11 of the skeleton opening by bolts, and is a long plate portion 21 (first wall surface side plate portion) and a short portion perpendicular to the long plate portion 21. It is composed of a plate portion 22 (first three-sided frame side plate portion). The length of the long plate portion 21, here, the length in the direction perpendicular to the short plate portion 22, is longer than the length in the direction perpendicular to the long plate portion 21 of the short plate portion 22. A plurality of elongated holes 25 extending in the longitudinal direction are formed in the elongated plate portion 21. With the elongated hole 25, the position of the first L-shaped metal fitting 15 can be adjusted in the vertical direction. The short plate portion 22 is preferably formed with two elongated holes 26 extending in a direction perpendicular to the long plate portion 21.

The second L-shaped metal fitting 16 is a metal fitting that is fastened and fixed to the vertical frame 12 side of the three-sided frame 10 by bolts 32 (see FIG. 1 (B)), and has a short plate portion 24 (second wall surface side plate portion). , It is composed of a long plate portion 23 (second three-sided frame side plate portion) perpendicular to the short plate portion 24. The short plate portion 24 is formed with a plurality of elongated holes 30 extending in a direction perpendicular to the long plate portion 23. When the short plate portion 22 of the first L-shaped metal fitting 15 and the short plate portion 24 of the second L-shaped metal fitting 16 are overlapped, the long hole 26 and the long hole 30 overlap each other. A square root bolt 27 (connecting bolt) is inserted from above into one of the overlapping elongated holes 26 and 30, and a nut (not shown) is screwed from below. The square root bolt 28 (connecting bolt) is inserted into the other slotted holes 26 and 30 from below, and the nut 29 is screwed from above. The corner portions of the square root bolts 27 and 28 include fitting portions 27a and 28a provided between the male screw portion and the head portion, and the fitting portions 27a and 28a are formed in a rectangular shape. The fitting portions 27a and 28a are formed so as to fit into the long holes 26 and 30 corresponding to the widths of the long holes 26 and 30, and the square root bolt 27 inserted into the long holes 26 and 27. , 28 rotations are prevented. Such elongated holes 26 and 30 make it possible to adjust the position of the vertical frame 12 in the left-right direction.

The long plate portion 23 of the second L-shaped metal fitting 16 is formed with a long hole 31 extending in the direction perpendicular to the longitudinal direction thereof, in this case, in the front-rear direction when fixed to the vertical frame 12. A square root bolt 32 (vertical frame fixing bolt) is inserted into the slotted hole 31 from the outside, and a nut 33 is screwed from the inside. The corner portion of the square root bolt 32 corresponds to the width of the slotted hole 31 as the fitting portion 32a. With such an elongated hole 31, the position of the vertical frame 12 can be adjusted in the front-rear direction.

Here, FIG. 4 is a diagram showing a three-way frame fixing device 14 temporarily fixed to the side wall surface 11 of the skeleton opening. In FIG. 4, for the sake of clarity, only one temporarily fixed three-sided frame fixing device 14 is shown.
In the temporary fixing of the three-way frame fixing device 14, the first L-shaped metal fitting 15 is temporarily attached to the side wall surface 11 of the skeleton opening with a bolt (not shown), and the position in the vertical direction is adjusted. Then, the short plate portion 22 of the first L-shaped metal fitting 15 and the short plate portion 24 of the second L-shaped metal fitting 16 are overlapped with each other, and the square root bolts 27 and 28 are inserted into the elongated holes 26 and 30 to loosen the nut 29. Temporarily attach it with. Temporarily attach the square root bolt 32 to the long hole 31 of the long plate portion 23 of the second L-shaped metal fitting 16 while loosening it. Here, temporary attachment and temporary fixing mean that the fastening members such as the square root bolts 27, 28, and 32 are not completely fastened, and the position of the three-sided frame 10 can be adjusted.

In the present embodiment, by superimposing the short plate portions 22 and 24 on each other, the three-way frame fixing device 14 can be arranged even in a narrow gap between the vertical frame 12 and the side wall surface 11. Further, by superimposing the short plate portions 22 and 24 on each other, the long plate portion 23 of the second L-shaped metal fitting 16 is on the lower side, so that the center of gravity is lowered and the three-way frame fixing device 14 is temporarily fixed with a bolt. It is possible to avoid turning by its own weight.

The three-way frame fixing device of the elevator according to the present embodiment is configured as described above, and next, the installation process and the position adjustment procedure of the three-way frame 10 using the three-way frame fixing device 14 will be described.
In FIG. 1, the installation of the three-way frame 10 using the three-way frame fixing device 14 is performed by temporarily fixing the three-way frame fixing device 14 to a predetermined position on the side wall surface 11 of the opening, and then following the procedure of the outline as follows. Will be done. That is, one vertical frame 12 is temporarily fixed, the other vertical frame 12 is temporarily fixed, and the horizontal frame 13 is attached in order, and the three-sided frame 10 is assembled. After that, the position of the three-sided frame 10 in the front-rear direction is adjusted, and the position in the left-right direction is adjusted.

Hereinafter, the installation procedure will be described in more detail with reference to FIG.
FIG. 5 is a diagram illustrating an operation of engaging the vertical frame 12 on the right side of the three-way frame 10 when viewed from the hoistway side with the three-way frame fixing device 14.
On the back surface of the vertical frame 12, a Daruma hole 36 is formed at a predetermined position corresponding to the three-way frame fixing device 14. The Daruma hole 36 is a hole having a shape in which a narrow square hole is connected under a circular hole. The long plate portion 23 of the second L-shaped metal fitting 16 is fastened to the vertical frame 12 by using the square root bolt 32, and the round hole of the daruma hole 36 is designed to pass the head of the square root bolt 32. .. On the other hand, the square hole of the Daruma hole 36 is set to a width that does not allow the head of the square root bolt 32 to pass through. The Daruma hole 36 may be provided in the reinforcing member 38 as shown in FIG. 6, depending on the structure in which the vertical frame 12 does not have a back plate.

As shown in FIG. 5B, the square root bolt 32 is attached to the long hole 31 of the long plate portion 23 of the second L-shaped metal fitting 16 in a state where the nut 33 is loose.

While supporting the vertical frame 12 by hand, the worker inserts the head of the square root bolt 32 into the round hole of the daruma hole 36, and then slides the second L-shaped metal fitting 16 downward. Then, as shown in FIG. 5C, since the shaft of the square root bolt 32 enters the square hole of the daruma hole 36, the vertical frame 12 can be temporarily fixed by the three-way frame fixing device 14. By simply passing the square root bolt 32 through the daruma hole 36 in this way, the vertical frame 12 can be temporarily fixed to the second L-shaped metal fitting 16 of the three-way frame fixing device 14, so that even one worker can install it.

In FIGS. 5A to 5C, temporary fixing to the three-way frame fixing device 14 at the uppermost stage of the vertical frame 12 on the right side is shown, but the three-way frame fixing device 14 (not shown) below it is shown. To engage in the same way.
Further, since the temporary fixing of the vertical frame 12 on the left side is the same, the description thereof will be omitted. After the temporary fixing of the left and right vertical frames 12 is completed, the horizontal frame 13 is attached to the upper end portion of the vertical frame 12 (see FIG. 1).

After the temporary fixing of the three-sided frame 10 to the skeleton opening is completed in this way, next, the position adjustment of the three-sided frame 10 in the front-rear direction and the left-right direction will be described with reference to FIGS. 7 and 8.
FIG. 7 is a diagram illustrating a method of adjusting the position of the three-sided frame 10 in the front-rear direction. In FIG. 7, it is assumed that the temporary fixing of the vertical frame 12 is completed. The skeleton of the opening is omitted.

In the three-way frame fixing device 14, the square root bolt 32 is inserted into the elongated hole 31 extending in the front-rear direction in the elongated plate portion 23 of the second L-shaped metal fitting 16, and the nut 33 is screwed into the elongated plate portion 23. With the nut 33 loosened, the vertical frame 12 can be moved little by little in the front-rear direction, so the position of the vertical frame 12 in the front-rear direction can be easily adjusted even in a narrow space. It is a figure explaining the method of adjusting the position of the frame 10 in the left-right direction, and FIG. 8 (B) is a view of the vertical frame 12 and the three-way frame fixing device 14 shown in FIG. It is a plan view.

In the three-way frame fixing device 14, when the square root bolts 27 and 28 inserted in the elongated holes 26 and 30 are not tightened with the nuts 29, the vertical frame 12 can be moved little by little in the left-right direction, so that it is vertical. The position of the frame 12 in the left-right direction can be easily adjusted even in a narrow space.

After adjusting the positions of the three-way frame 10 in the front-rear direction and the left-right direction, tighten all the bolts and fix the three-way frame.
In this embodiment, since the square root bolts 27, 28, 32 are used for the bolts, it is not necessary to apply a detent to the bolt head on the opposite side of the nuts 29, 33, etc., only the nuts 29, 33. One-sided construction is possible, which can be improved by tightening.
Further, as shown in FIG. 8, in the fastening work after the adjustment in the left-right direction, the directions of the square root bolts 27 and 28 are reversed so that one has the head up and the other has the head down. Since the space for fastening work can be secured so that the tool 40 does not interfere with the heads of the square root bolts 27 and 28, it is possible to fasten using a narrow space well.

At the landing on other floors, the three-sided frame 10 can be installed by the same procedure as described above. In this way, by using the three-sided frame fixing device 14 that can be easily installed even in a narrow space without welding at the landing on all floors, it is possible to easily perform installation work without requiring special techniques. Therefore, the installation work efficiency can be significantly improved.

(Modification example)
Next, a modified example of the three-sided frame fixing device of the elevator according to the embodiment of the present invention will be described with reference to FIG.
The first L-shaped metal fitting 15 of the three-sided frame fixing device 14 is a metal fitting that is fastened and fixed to the side wall surface 11 of the skeleton opening by bolts. In this modification, the relationship between the long plate portion 21 and the short plate portion 22 can be exchanged with that of the first embodiment, and the long plate portion 21 is formed with a plurality of elongated holes 25 extending in the longitudinal direction. Has been done. In the short plate portion 22, long holes 26 extending in a direction perpendicular to the long plate portion 21 are formed in the same number as the long holes 25 at the same intervals. Long holes 30 (see FIG. 9B (b)) are also formed in the short plate portion 24 of the second L-shaped metal fitting 16 at the same intervals as the long hole 25 of the long plate portion 21.

In this three-way frame fixing device 14, as shown in FIG. 9A (a), when the gap between the side wall surface 11 of the skeleton opening and the vertical frame 12 is narrow (for example, 50 mm), the same as in the above-described embodiment. , The short plate parts 22 and 24 are overlapped with each other and fastened with the square root bolts 27 and 28. When the gap between the side wall surface 11 and the vertical frame 12 of the skeleton opening is wide, as shown in FIG. 9B (b), the surfaces to be fastened are exchanged, and the short plate portion 22 is used as the first wall surface side plate portion. If the long plate portion 21 (first three-sided frame side plate portion) and the short plate portion 24 are overlapped with each other, it is possible to cope with the widened gap size.

The three-way frame fixing device of the present invention has been described above with reference to suitable embodiments, but these embodiments are given as examples and are not intended to limit the scope of the invention. Of course, the novel devices, methods and systems described herein can be implemented in various forms and can be variously omitted, replaced or modified without departing from the gist of the present invention. be. The claims and their equivalents are intended to cover embodiments or improvements thereof within the scope of the gist of the invention.

1 ... Elevator landing wall, 10 ... Three-sided frame, 11 ... Side wall surface, 12 ... Vertical frame, 13 ... Horizontal frame, 14 ... Three-sided frame fixing device, 15 ... 1st L-shaped metal fittings, 16 ... 2nd L-shaped metal fittings, 21 ... long plate part, 22 ... short plate part, 23 ... long plate part 24 ... short plate part, 25 ... long hole, 26 ... long hole, 27, 28 ... square root bolt, 30 ... long hole, 31 ... long hole , 32 ... Square root bolt

In order to achieve the above object, the sampou frame fixing device according to one embodiment of the present invention is
It is a three-sided frame fixing device used to fix a three-sided frame consisting of a vertical frame and a horizontal frame to the skeleton opening of the elevator landing.
A first L-shaped metal fitting having a first wall surface side plate portion attached to the side wall surface of the opening and a first three-sided frame side plate portion perpendicular to the first wall surface side plate portion .
A second L-shaped metal fitting having a second three-sided frame side plate portion attached to the back surface of the vertical frame and a second wall surface side plate portion perpendicular to the second three-sided frame side plate portion is provided.
An elongated hole extending in the left-right direction of the skeleton opening is formed in the first three-sided frame side plate portion and the second wall surface side plate portion, and the first three-sided frame side plate portion and the second wall surface side plate portion are overlapped with each other. In this state, the first three-sided frame side plate portion and the second wall surface side plate portion are fastened by the connecting bolt inserted into the elongated hole.
An elongated hole extending in the front-rear direction of the skeleton opening is formed in the second three-way frame side plate portion, and the vertical frame and the second three-way frame side plate portion are inserted into the elongated hole extending in the front-rear direction. It is characterized in that it is fastened by a vertical frame fixing bolt that can be engaged with the vertical frame.

Claims (6)

It is a three-sided frame fixing device used to fix a three-sided frame consisting of a vertical frame and a horizontal frame to the skeleton opening of the elevator landing.
A first L-shaped metal fitting having a first wall surface side plate portion attached to the side wall surface of the opening and a first three-sided frame short plate portion perpendicular to the long plate portion.
A second L-shaped metal fitting having a second three-way frame side plate portion attached to the back surface of the vertical frame and a second wall surface side plate portion perpendicular to the second three-way frame side plate portion is provided.
An elongated hole extending in the left-right direction of the skeleton opening is formed in the first three-sided frame side plate portion and the second wall surface side plate portion, and the first three-sided frame side plate portion and the second wall surface side plate portion are overlapped with each other. In this state, the first three-sided frame side plate portion and the second wall surface side plate portion are fastened by the connecting bolt inserted into the elongated hole.
An elongated hole extending in the front-rear direction of the skeleton opening is formed in the second three-way frame side plate portion, and the vertical frame and the second three-way frame side plate portion are inserted into the elongated hole extending in the front-rear direction. A three-way frame fixing device for an elevator, which is fastened with a vertical frame fixing bolt that can be engaged with the vertical frame. On the back surface of the vertical frame, a daruma hole into which the head of the vertical frame fixing bolt for fastening the vertical frame and the second three-way frame side plate portion can be inserted and engaged is formed, and the vertical frame fixing bolt is formed. The three-way frame fixing device for an elevator according to claim 1, wherein the elevator is composed of a square root bolt. The first three-sided frame side plate portion and the second wall surface side plate portion are fastened with at least two square root bolts.
The three-way frame fixing device for an elevator according to claim 1, wherein the insertion directions of the square root bolts are opposite to each other. The length of the first wall surface side plate portion in the direction perpendicular to the first three-sided frame side plate portion is longer than the length of the first three-sided frame side plate portion in the direction perpendicular to the first wall surface side plate portion. The three-way frame fixing device for an elevator according to claim 1. The length of the first three-sided frame side plate portion in the direction perpendicular to the first wall surface side plate portion is longer than the length of the first wall surface side plate portion in the direction perpendicular to the first three-sided frame side plate portion. The three-way frame fixing device for an elevator according to claim 1. It is a three-way frame installation method that installs a three-way frame consisting of a vertical frame and a horizontal frame at the opening of the elevator platform.
The three-sided frame fixing device according to any one of claims 1 to 4 is temporarily fixed to the side wall surface of the skeleton opening.
By engaging the vertical frame fixing bolt with one of the vertical frames, one of the vertical frames is temporarily fixed to the three-way frame fixing device.
Similarly, the other vertical frame is temporarily fixed by the three-way frame fixing device, and the horizontal frame is attached to the upper ends of the left and right vertical frames.
The position of the vertical frame in a state where the connecting bolt inserted into the slotted hole of the first three-sided frame side plate portion of the first L-shaped bracket and the second wall surface side plate portion of the second L-shaped bracket is loosened. Adjust left and right,
The position of the vertical frame is adjusted in the front-rear direction with the vertical frame fixing bolt inserted in the elongated hole of the second three-way frame side plate portion of the second L-shaped metal fitting loosened.
Finally, a method for installing a three-way frame of an elevator, characterized in that the left and right vertical frames are fastened and fixed to the skeleton opening.

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