CN112875473B

CN112875473B - Door device of elevator

Info

Publication number: CN112875473B
Application number: CN202011350866.7A
Authority: CN
Inventors: 塙直人
Original assignee: Toshiba Elevator Co Ltd
Current assignee: Toshiba Elevator and Building Systems Corp
Priority date: 2019-11-29
Filing date: 2020-11-26
Publication date: 2023-05-30
Anticipated expiration: 2040-11-26
Also published as: JP2021084802A; JP6818857B1; CN112875473A

Abstract

The invention can eliminate the position deviation and efficiently mount the door top box, and can mount the door top box even if the working space is small. According to one embodiment, a door apparatus of the present invention includes: a bracket (22) for fixing the door top box (14) to the wall surface of the doorway; and at least two or more fastening members for fixing the door top box to the bracket, wherein at least two or more parallel first long holes (24) are formed in one of the upper end portion of the door top box and the mounting portion (26) of the bracket overlapped with the upper end portion, a second long hole (27) orthogonal to the first long hole is formed in the other one of the upper end portion of the door top box and the mounting portion, the fastening members are inserted into the first long hole and the second long hole to be fastened, and at least one of the fastening members forms a direction fixing portion for fixing the door top box so that the position in the longitudinal direction of only one of the first long hole and the second long hole can be fixed and the position in the longitudinal direction of the other long hole can be adjusted.

Description

Door device of elevator

Technical Field

Embodiments of the present invention relate to a door device for an elevator.

Background

The entrance of the elevator is opened and closed by a door device. In general, in such a door apparatus, a door panel is suspended by a door hanger engaged with a door guide rail attached to a roof box (header) via a roller. A door sill is arranged on the floor of the entrance of the lobby, and a guide shoe (guide shoe) arranged at the lower end of the door plate is engaged with a groove of the door sill.

Generally, a roof box is fixed using an L-shaped bracket fixed to a mounted portion on a main body side of a building. Conventionally, long holes for fixing are formed in the upper surface of a roof box and an L-shaped bracket, respectively, and the roof box is fixed while adjusting the position of the roof box by fastening members such as bolts and nuts.

In the position adjustment when the door top box is mounted, adjustment in two directions, that is, the left-right direction and the front-rear direction is required. Therefore, the long fixing hole formed in the bracket crosses the long fixing hole on the upper surface of the door top box at right angles.

As for the positioning adjustment for the door top box mounting operation of the door apparatus, various techniques have been proposed conventionally, for example, patent document 1 in which positioning adjustment is independently performed and patent document 2 in which the bracket is adjusted in accordance with the angle of the body wall surface can be cited.

Prior art literature

Patent literature

Patent document 1: japanese patent No. 2588088

Patent document 2: japanese patent No. 4861697

Disclosure of Invention

Problems to be solved by the invention

However, in the case of the above-described fixing structure in which the long hole of the bracket is orthogonal to the long hole of the door top box, the door top box can be moved in any direction of the left and right, front and rear with the bolt and the nut loosened. For example, when the operator is to find the position of the roof box in the left-right direction, the position is likely to be shifted in the front-rear direction. Therefore, a skilled skill is required for the installation work of the door header box.

Further, according to the structure of the main body, there is a problem that an operation space for easily tightening the bolt and the nut cannot be ensured.

The present invention has been made in view of the problems of the prior art, and an object of the present invention is to provide a door apparatus for an elevator capable of efficiently attaching a door header box without positional displacement and capable of attaching a door header box even in a case where the work space is small.

Means for solving the problems

In order to achieve the above object, an elevator door device according to an embodiment of the present invention includes

The door apparatus of an elevator includes:

a bracket for fixing the door top box to a wall surface of the doorway; and

at least two sets of fastening members for securing the door header to the bracket,

at least two parallel first long holes are formed on one side of the upper end part of the door top box and the mounting part of the bracket overlapped with the upper end part, a second long hole orthogonal to the first long holes is formed on the other side,

the fastening member is inserted into the first long hole and the second long hole to be fastened,

at least one of the fastening members constitutes a direction fixing portion for fixing the door header box so that only a position in a longitudinal direction of one of the first long hole and the second long hole is fixed and a position in the longitudinal direction of the other long hole is adjustable.

Drawings

Fig. 1A to 1C are diagrams showing a door apparatus of an elevator according to a first embodiment of the present invention, wherein fig. 1A is a front view showing the door apparatus from a hoistway side, fig. 1B shows a section IB-IB in fig. 1A, and fig. 1C shows a section IC-IC in fig. 1A.

Fig. 2 is an exploded perspective view of a fastening structure of the bracket and the roof box in the first embodiment.

Fig. 3 is a view showing a section III-III in fig. 2.

Fig. 4 is an exploded perspective view of a fastening structure of a bracket and a roof box according to modification 1 of the first embodiment.

Fig. 5 is an exploded perspective view of a fastening structure of a bracket and a roof box according to modification 2 of the first embodiment.

Fig. 6 is an exploded perspective view of a fastening structure of a bracket and a roof box according to modification 3 of the first embodiment.

Fig. 7 is an exploded perspective view of a fastening structure of the bracket and the roof box in the second embodiment.

FIG. 8 is a view showing a section VIII-VIII in FIG. 7.

Fig. 9 is an exploded perspective view of a fastening structure of the bracket and the roof box in the third embodiment.

Fig. 10 is a view showing a section X-X in fig. 9.

Fig. 11A and 11B are diagrams showing examples of the state of the main body to which the door top box is attached.

Fig. 12 is an exploded perspective view of a fastening structure of a bracket and a roof box in the fourth embodiment.

Fig. 13 is a view showing a section XIII-XIII in fig. 12.

Detailed Description

Hereinafter, an embodiment of a door device for an elevator according to the present invention will be described with reference to the drawings.

(first embodiment)

Fig. 1A to 1C are diagrams showing a door device of an elevator according to a first embodiment of the present invention. Fig. 1A is a front view showing a gate device from a hoistway side, fig. 1B shows a section IB-IB in fig. 1A, and fig. 1C shows a section IC-IC in fig. 1A.

In fig. 1A to 1C, reference numeral 10 denotes a gate device as a whole. Reference numeral 11 denotes an opening which serves as an entrance. In the elevator lobby, an entrance is formed by a door pocket consisting of vertical frames 13a, 13b and a horizontal frame 13 c.

The door top box 14 is secured to the body wall above the door pocket using brackets 22. A door rail 16 is horizontally disposed on the door top box 14.

Reference numerals

12A, 12B are door panels of the lobby. Door suspenders 15a, 15B are respectively attached to upper end portions of the

door panels

12A, 12B. The

door hangers

15a and 15b are provided with rollers 17 that rotate on the door rail 16. The rollers 17 engage with the door rail 16, and thereby the

door panels

12A and 12B are opened and closed while being suspended from the door rail 16.

A threshold 19 is provided on the floor of the entrance of the elevator lobby. Guide shoes 20 are attached to the lower ends of the

door panels

12A, 12B, and the guide shoes 20 engage with grooves formed in the longitudinal direction of the door ridge 19.

In the present embodiment, when defining the direction, the left-right direction refers to the left-right direction from the hoistway side toward the

door panels

12A and 12B, and the front-rear direction refers to the front-rear direction from the hoistway side toward the

door panels

12A and 12B.

In the door apparatus according to the present embodiment, the following fastening members are used to easily adjust the position of the door top case 14 when the door top case 14 is fixed to the wall surface of the main body.

Fig. 2 is an exploded perspective view of the fastening structure of the bracket 22 and the door top box 14 in the first embodiment. Fig. 3 is a view showing a section III-III in fig. 2.

The bracket 22 is a member made of a metal plate bent in an L shape. Two

elongated holes

25a, 25b long in the vertical direction are formed in the vertical surface of the bracket 22. The bracket 22 is fixed to the wall surface by fastening members fitted into the

long holes

25a and 25b.

On the other hand, two

elongated holes

24a, 24b long in the front-rear direction are formed in parallel in the horizontal mounting portion 22a of the bracket 22. An upper end 26 of the door top case 14 is folded horizontally, and a long hole 27 is formed in the upper end 26 so as to be long in the left-right direction. The long hole 27 of the upper end 26 of the door top box 14 extends longer in the left-right direction than the interval of the

long holes

24a, 24b of the bracket 22, and the

long holes

24a, 24b intersect the long hole 27 at right angles. The number of the

long holes

24a and 24b is not limited to two. Or three or more.

As fastening members for fixing the upper end 26 of the door top case 14 to the bracket 22,

bolts

28a and 28b and

nuts

29 and 29 are used. The bolt 28a is combined with a cylindrical collar (collar) 33, and

washers

31 and 32 are used above and below the collar 33. The other bolt 28b uses only

washers

31 and 32 without using a collar 33.

When the

long holes

24a, 24b are compared with the long hole 27, the

long holes

24a, 24b become long holes having a larger width. The collar 33 has an inner diameter through which the bolt 28a can be inserted, and has an outer diameter smaller than the width (in the short-side direction) of the long hole 24 a. The outer diameter of the collar 33 is set to be larger than the width (in the short-side direction) of the long hole 27 located below. As shown in fig. 3, the length (axial direction) of the collar 33 is set to be larger than the plate thickness (depth of the long hole 24 a) of the bracket 22.

In the present embodiment, the bolts 28a inserted through the

washers

31, 32 and the collar 33 are inserted into the

long holes

24a and 27, and the nuts 29 are tightened. At this time, the upper end of the collar 33 protrudes upward from the long hole 24a, and a gap can be formed between the washer 32 and the mounting portion 22a of the bracket 22. In this state, the collar 33 is in contact with the upper end 26, and the position of the door top box 14 in the left-right direction is fixed, but the position in the front-rear direction is not fixed and can be adjusted. Thus, the bolt 28a, the nut 29, the collar 33, and the

washers

31, 32 constitute one direction fixing portion that fixes only the position of the door top box 14 in the left-right direction.

In this embodiment, the

washers

31 and 32 are used in the one-direction fixing portion, but instead of using the

washers

31 and 32, for example, bolts with flanges (bolts whose flanges have the same function as the washers, that is, a function of securing a gap between the mounting portion 22a and the flange) may be used. Instead of the collar 33 and the washer 32, a shoulder bolt with a flange (the stepped portion has the same function as the collar) may be used.

When the bolt 28b is inserted into the long hole 24b and the long hole 27 and the nut 29 is tightened, the door top box 14 is restrained in position in both the left-right direction and the front-rear direction.

The door device of the elevator according to the present embodiment is configured as described above, and a position adjustment procedure when the door panel is attached will be described next.

In fig. 2, first, the bracket 22 is virtually attached to the upper end 26 of the door header tank 14. That is, the washer 32 and the collar 33 are attached to the bolt 28a, and the bolt 28a is inserted into the

long holes

24a and 27 from above. At this time, the nut 29 is loosely fitted together with the washer 31. The washer 32 is also attached to the other bolt 28b, and the

long holes

24b and 27 are inserted from above. At this time, the nut 29 is loosely fitted together with the washer 31.

Thereafter, the bracket 22 is fixed to the wall surface of the fixed portion on the main body side. This fixation is performed by tightening Anchor bolts (not shown) from the

long holes

25a, 25b.

Next, in order to adjust the position, the position of the roof box 14 is aligned in accordance with the left and right references of the entrance of the hall, and the nuts 29 of the bolts 28a are tightened. The left and right positions of the roof box 14 are fixed by tightening the bolts 28a and nuts 29 constituting such a direction fixing portion.

In a state where the nut 29 is fastened to the bolt 28a, as shown in fig. 3, the position of the door top box 14 along the left-right direction of the long hole 27 is restrained by being sandwiched between the

washers

31, 32. The washer 32 located above the collar 33 is not pressed against the mounting portion 22a of the bracket 22, leaving a gap. The position of the door top case 14 in the front-rear direction of the long hole 24a is not completely restrained.

In this way, by inserting the collar 33 into the long hole 24a, even if the nut 29 is tightened, only the position of the door top box 14 in the left-right direction is fixed, and the position can be adjusted in the front-rear direction. After that, after the position of the door top case 14 is determined by adjusting the position in the front-rear direction, when the remaining nuts 29 are fastened to the bolts 28b, the door top case 14 is completely restrained in both the left-right direction and the front-rear direction, and the installation is completed.

As described above, according to the present embodiment, by tightening at least one bolt 28a constituting one direction fixing portion, only the position of the door top box 14 in the left-right direction can be fixed, and therefore, the position of the door top box 14 can be sequentially adjusted in the left-right direction and the front-rear direction, and the fixing can be performed easily.

(modification)

Next, several modifications of the first embodiment of the present invention will be described with reference to fig. 4 to 6.

Fig. 4 is an exploded perspective view of a fastening structure of bracket 22 and roof box 14 according to modification 1 of the first embodiment.

The modification 1 is different from the embodiment of fig. 2 in that it is a long hole provided in the mounting portion 22a of the bracket 22 and the upper end portion 26 of the roof box 14, respectively. In modification 1, the long hole 24 on the bracket 22 side is one long hole and is long in the left-right direction, and the long hole on the door header 14 side is two

long holes

27a, 27b that are long in the front-rear direction and extend in parallel. The same applies to the embodiment of fig. 2 in that one bolt 28a is used together with the collar 33. The width of the long hole 24 is larger than the width of the

long holes

27a, 27b. Regarding the outer diameter of the collar 33, the play for sliding is counted to be slightly smaller than the width of the long hole 24 and larger than the width of the long hole 27 a.

In modification 1 described above, the bolt 28a, the collar 33, and the nut 29 constitute a direction fixing portion that fixes only the position of the door top box 14 in the front-rear direction. Thus, first, the position of the door top box 14 in the front-rear direction is adjusted and fixed by fastening the nut 29 to the bolt 28a, and then, after the position in the left-right direction is adjusted, the nut 29 is fastened to the bolt 28b, whereby adjustment and fixation can be easily performed.

Next, fig. 5 is an exploded perspective view of a fastening structure of the bracket 22 and the roof box 14 according to modification 2 of the first embodiment.

The modification 2 is different from the embodiment of fig. 2 in that

bolts

28a and 28b are inserted into the

long holes

27 and 24a and 24b from below, and nuts 29 are tightened from above. In modification 2, the same as in the embodiment of fig. 2 is obtained by using one bolt 28a together with a collar 33. However, the width of the long hole 27 is larger than the widths of the

long holes

24a, 24b, and the outer diameter of the collar 33 is larger than the width of the long hole 24a and slightly smaller than the width of the long hole 27.

In modification 2 described above, the bolt 28a, the collar 33, and the nut 29 constitute a direction fixing portion that fixes only the position of the door top box 14 in the front-rear direction. Thus, first, by tightening the nut 29 to the bolt 28a so that the collar 33 abuts against the mounting portion 22a, the position of the door top box 14 in the front-rear direction can be adjusted and fixed. Next, after the position in the left-right direction is adjusted, the nut 29 is fastened to the bolt 28b, so that the position adjustment and fixation of the door top box 14 can be easily performed.

Next, fig. 6 is an exploded perspective view of a fastening structure of the bracket 22 and the roof box 14 according to modification 3 of the first embodiment.

This modification is similar to modification 1 of fig. 4, in which the long hole 24 on the bracket 22 side is one long hole and is long in the left-right direction, and the long hole on the door top box 14 side is two

long holes

27a, 27b extending in parallel and long in the front-rear direction. The same applies to the use of one of the bolts 28a together with the collar 33.

However, the

bolts

28a, 28b are not inserted from above but from below. The width of the

long holes

27a, 27b is larger than the width of the long hole 24. The collar 33 has an outer diameter slightly smaller than the width of the long hole 27a and larger than the widths of the

long holes

27a, 27b.

In modification 3 described above, the bolt 28a, the collar 33, and the nut 29 constitute a direction fixing portion that fixes the position of the door top box 14 in only the left-right direction. Therefore, first, the position of the door top box 14 in the left-right direction is adjusted and fixed by fastening the nut 29 to the bolt 28a, and then, after the position in the front-rear direction is adjusted, the nut 29 is fastened to the bolt 28b, so that the position adjustment and the fixation can be easily performed.

(second embodiment)

Next, a second embodiment of the present invention will be described with reference to fig. 7 and 8.

Fig. 7 is an exploded perspective view of the fastening structure of the bracket 22 and the door top box 14 in the second embodiment. FIG. 8 is a view showing a section VIII-VIII in FIG. 7.

The first embodiment is an embodiment using the collar 33 as an element of the one-way fixing portion, but the second embodiment is different in that the nut 36 is used. In fig. 7 and 8 of the second embodiment, the same components as those of the first embodiment of fig. 2 and 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

In fig. 7, the nut 36 is used together with the bolt 28b, and unlike the bolt 28a, the washer 31 is not used. The nut 36 is a nut that can be fitted into the long hole 24b on the bracket 22 side, and in this embodiment, the width of the long hole 24b is set to a size that is spaced apart by a gap that allows the opposite side width of the nut 36 (the width between two parallel surfaces of the nut head) to slide. The width of the long hole 27 of the upper end 26 of the roof box 14 is set narrower than the width of the long hole 24b. As shown in fig. 8, the nut 36 is held in a state of being placed on the upper end portion 26.

In the present embodiment, when the bolt 28b is inserted into the long hole 27 from the lower surface side of the upper end portion 26 of the door top case 14 and screwed into the nut 36 having the long hole 24a inserted therein, the bolt 28b can be screwed without rotating together with the nut 36. In a state where only the bolt 28b is fastened, only the upper end 26 of the roof box 14 is restrained by being sandwiched by the bolt 28b and the nut 36, and therefore the position of the roof box 14 in the left-right direction is fixed, but the position in the front-rear direction is not fixed and can be adjusted.

On the other hand, when the nut 29 is fastened to the bolt 28a inserted into the long hole 27 and the long hole 24a, the door top box 14 is restrained in position in both the left-right direction and the front-rear direction.

According to the second embodiment described above, the nut 36 is fastened to the bolt 28b to adjust the position of the door top case 14 in the lateral direction, and then the nut 29 is fastened to the bolt 28a after the position in the front-rear direction is adjusted, whereby adjustment and fixation can be easily performed. The second embodiment is mainly suitable for a bolt screwing operation performed from a single side of the lower side. In the second embodiment described above, the deformation of the first embodiment as in the modifications 1 to 3 can be applied, and according to the situation, the bolt can be screwed from the lower side or the upper side.

(third embodiment)

Next, a third embodiment of the present invention will be described with reference to fig. 9 and 10.

Fig. 9 is an exploded perspective view of a fastening structure of the bracket 22 and the door top box 14 in the third embodiment. Fig. 10 is a view showing a section X-X in fig. 9.

The second embodiment is an embodiment using the nut 36 as an element of the one-direction fixing portion, but the third embodiment is different in that a band nut is used together with the nut 36. In fig. 9 and 10 of the third embodiment, the same components as those of the second embodiment of fig. 7 and 8 are denoted by the same reference numerals, and detailed description thereof is omitted.

In fig. 9, the band plate nut is a nut having an integral structure of the plate 40 and the nut portion 42, and is used together with the bolt 28a. A circular hole 41 is formed in the plate 40, and the diameter of the circular hole 41 is larger than that of the nut 36. The pitch between the nut portion 42 and the circular hole 41 matches the pitch between the bracket-side

long holes

24a, 24b.

In the case of the third embodiment, the width of the long hole 24b is set to a dimension obtained by adding a gap allowing sliding to the width of the opposite side of the nut 36, and the width of the long hole 27 of the upper end 26 of the door top box 14 is set to be narrower, as in the second embodiment.

In the present embodiment, the bolt 28b is inserted into the long hole 27 from the lower surface side of the upper end portion 26 of the door top case 14, and screwed into the nut 36 that has been fitted into the long hole 24 a. The bolt 28b can be screwed without being rotated together with the nut 36. In a state where only the bolts 28b are fastened, the position of the door top box 14 in the left-right direction is fixed, but the position in the front-rear direction is not fixed and can be adjusted.

On the other hand, when the nut portion 42 of the panel nut is fastened to the bolt 28a inserted into the long hole 27 and the long hole 24a, the door top box 14 is simultaneously restrained in position in both the left-right direction and the front-rear direction.

According to the third embodiment described above, the nut 36 is fastened to the bolt 28b to adjust the position of the door top case 14 in the lateral direction, and then the nut portion 42 is fastened to the bolt 28a after the position in the front-rear direction is adjusted, whereby adjustment and fixation can be easily performed.

In particular, when the bolt 28a is screwed in, the nut 36 is fitted in the circular hole 41 of the band plate nut, and the band 40 is restrained, so that the nut portion 42 is not rotated together, and the fixation can be easily performed.

Here, fig. 11A and 11B are diagrams showing examples of the state of the main body 50 to which the door top box 14 is attached. Fig. 11A shows a state in which the door top box 14 is attached to the wall surface of the main body 50, and fig. 11B shows a state in which the door top box 14 is attached to the opening of the main body 50.

In the situation shown in fig. 11A, since there is no member that obstructs the operation of screwing the

bolts

28a, 28b, the operation is easy to be performed from above or from below. However, in the case of fig. 11B, since there is no working space above the upper end 26 of the roof box 14, the screw bolts 28a and 28B have to be screwed from the lower side. In the present embodiment, as described above, the nut portion 42 can be prevented from rotating together, and therefore the bolt 28a can be easily fastened by an operation on the lower side surface.

(fourth embodiment)

Next, a fourth embodiment of the present invention will be described with reference to fig. 12 and 13.

Fig. 12 is an exploded perspective view of a fastening structure of the bracket 22 and the door top box 14 in the fourth embodiment. Fig. 13 is a view showing a section XIII-XIII in fig. 12.

The fourth embodiment is an embodiment using a stepped nut instead of the band plate nut of the third embodiment. In fig. 12 and 13 of the fourth embodiment, the same components as those of the third embodiment of fig. 9 and 10 are denoted by the same reference numerals, and detailed description thereof is omitted.

In fig. 12, a stepped nut 44 is used with bolt 28a. The stepped nut 44 is formed with an internal thread 45 in a nut body having a rectangular shape. A stepped portion 46 is formed on the lower surface of the stepped nut 44, and the stepped portion 46 has a width corresponding to the width of the long hole 24a, and is fitted into the long hole 24 a.

In the present embodiment, the bolt 28b is inserted into the long hole 27 from the lower surface side of the upper end portion 26 of the door top case 14, and screwed into the nut 36 that has been fitted into the long hole 24 a. At this time, the bolt 28b can be screwed without being rotated together with the nut 36. In a state where only the bolts 28b are fastened, the position of the door top box 14 in the left-right direction is fixed, but the position in the front-rear direction is not fixed and can be adjusted.

On the other hand, when the bolts 28a inserted into the

long holes

27 and 24a are screwed into the stepped nuts 44, the door top box 14 is simultaneously restrained in both the left-right direction and the front-rear direction. In this process, the stepped portion 46 of the stepped nut 44 is fitted into the long hole 24a, and thus can be fixed without rotating together.

According to the fourth embodiment described above, as shown in fig. 11B, even when there is no working space above the upper end 26 of the door header 14, the nut 36 can be prevented from rotating together, and therefore the bolt 28a can be easily fastened by an operation from the lower single-sided side.

The elevator door apparatus according to the present invention has been described above with reference to the preferred embodiments, but the present invention can be applied to a car door apparatus as well as the hall door apparatus according to the embodiment of the present invention. These embodiments are listed as examples and are not intended to limit the scope of the invention. Of course, the novel apparatus, method and system described in the specification can be implemented in various ways, and various omissions, substitutions and changes can be made without departing from the spirit of the invention. The scope of the claims and their equivalents is intended to cover the embodiments or modifications thereof within the scope of the gist of the invention.

Claims

1. A door apparatus for an elevator having a door top case, a door rail provided to the door top case, a door hanger engaged with the door rail via rollers, and a door panel suspended from the door hanger, the door apparatus comprising:

a bracket for fixing the door top box to a wall surface of the doorway; and

at least one of the fastening members constitutes a direction fixing portion for fixing the door top box so that only a position in a longitudinal direction of one of the first long hole and the second long hole is fixed and a position in the longitudinal direction of the other long hole is adjustable.

2. Door arrangement of an elevator according to claim 1, characterized in that,

the fastening member constituting the one-direction fixing portion is constituted by a bolt, a nut, and a collar having an outer diameter slightly smaller than a width of one of the first long hole and the second long hole, which is larger than the width, and having a length protruding from the long hole having the larger width.

3. Door arrangement of an elevator according to claim 1, characterized in that,

the fastening member constituting the one direction fixing portion is constituted by a bolt and a nut having an opposite side width slightly smaller than and approaching the width of one of the first long hole and the second long hole, which is larger than the width of the one long hole.

4. The door device of an elevator as defined in claim 3, wherein,

the fastening member that does not constitute the one-way fixing portion is constituted by a bolt and a nut of the band plate having a hole into which the nut of the one-way fixing portion can be fitted.

5. The door device of an elevator as defined in claim 3, wherein,

the fastening member that does not constitute the one-way fixing portion is constituted by a bolt and a stepped nut having a stepped portion that can be fitted into a long hole on the side from which the bolt protrudes.