JP7307889B1 - elevator - Google Patents

Abstract

An elevator equipped with a ladder device that has a simple structure and is easy to use. An elevator includes a ladder 40 provided below a landing doorway on the lowest floor as a ladder device 4 provided in a pit 2A of a hoistway, a string-like member 41 separate from the ladder 40, and a support part 42 provided above the landing doorway and supporting the string-like member 41 so as to have a portion that hangs below the floor surface of the landing doorway when in use. [Selection drawing] Fig. 3

Description

TECHNICAL FIELD The present invention relates to an elevator provided with a ladder system used when workers enter and leave a pit of a hoistway.

A ladder is provided in the pit of the hoistway (mainly the portion from the floor of the landing doorway on the lowest floor to the bottom of the hoistway). A ladder is used by a worker to descend into the pit from the entrance/exit of the landing when performing work such as installation work, maintenance work, and inspection work in the pit.

The ladder must be installed below the landing doorway in the pit and must be thin so as not to extend into the movable area of the car. For this reason, handrails cannot be provided so as to protrude from the ladder toward the center of the hoistway. However, if there is no handrail (especially if there is no part that protrudes above the floor surface of the hall doorway), safety cannot be sufficiently ensured.

Therefore, various ladder devices have been conventionally proposed. Ladder devices described in Patent Documents 1 and 2 are foldable ladders with handrails on top. The ladder device described in Patent Document 3 has a telescopic ladder and a handrail on the top.

Japanese Patent Application Laid-Open No. 2003-192253 Japanese Patent Application Laid-Open No. 2014-1071 JP 2010-275112 A

However, the ladder apparatus described in each of the above patent documents has a problem that its structure is complicated and its handling is troublesome.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an elevator equipped with a ladder device that is simple in structure and easy to use.

The elevator according to the present invention is
As a ladder device installed in the pit of the hoistway,
A ladder provided below the landing doorway on the lowest floor,
a string-like member separate from the ladder;
The elevator is provided with a support part that is provided above a landing doorway and suspends and supports the string-like member so as to have a portion that hangs below the floor surface of the landing doorway when in use.

Here, as one aspect of the elevator according to the present invention,
The pit has a horizontally elongated protruding part protruding from the wall surface along the lower edge of the landing doorway,
The ladder is provided in the space below the horizontally elongated projection,
The string-like member has a portion that hangs downward from the tip of the laterally elongated projection and toward the front of the ladder in a state of being suspended and supported by the support.

Further, as another aspect of the elevator according to the present invention,
The support part is either the surface facing the hoistway or the surface facing the landing doorway of the upper frame member of the jamb of the landing doorway, or the vicinity of the upper frame member among the faces facing the hoistway. It is possible to adopt the configuration of and provided at the location.

Further, as another aspect of the elevator according to the present invention,
The string-like member has a terminal engaging portion,
A configuration in which the support portion includes a concave portion and a locking body that detachably locks the terminal engaging portion in the concave portion can be adopted.

Further, as still another aspect of the elevator according to the present invention,
The string-like member may be provided with one or more enlarged portions or annular portions at appropriate locations.

According to the present invention, a string-like member separate from the ladder is provided, and in use, the string-like member is attached to the support portion and hung down to serve as a hand grip when the operator ascends and descends the ladder. When not in use, simply remove the cord-like member. Therefore, according to the present invention, it is possible to provide an elevator equipped with a ladder device that has a simple structure and is easy to use.

FIG. 1 is a perspective view of an elevator according to this embodiment. FIG. 2 is a partial cross-sectional side view of the lowest floor side of the elevator according to this embodiment. 3 is a front view of the ladder apparatus according to Embodiment 1. FIG. 4 is a side view of the ladder apparatus according to Embodiment 1. FIG. FIG. 5(a) is a vertical cross-sectional view of the vicinity of the support portion of the ladder apparatus. FIG.5(b) is a front view of a support part. FIG. 5(c) is a vertical cross-sectional view of a state in which the string-like member is locked to the supporting portion. FIG. 6(a) is a vertical cross-sectional view of the vicinity of the supporting portion of the ladder apparatus according to Embodiment 2. FIG. FIG. 6(b) is a vertical cross-sectional view of a state in which the string member is locked to the supporting portion. FIG. 7(a) is a vertical cross-sectional view of the vicinity of the support portion of the ladder device according to Embodiment 3. FIG. FIG. 7(b) is a vertical cross-sectional view of a state in which the string member is locked to the supporting portion. FIG. 8(a) is a vertical cross-sectional view of the vicinity of the supporting portion of the ladder device according to Embodiment 4. FIG. FIG. 8(b) is a vertical cross-sectional view of a state in which the string-like member is locked to the supporting portion. 9 is a front view of a ladder device according to Embodiment 5. FIG. 10 is a front view of a ladder apparatus according to Embodiment 6. FIG.

<Overall composition>
Hereinafter, each embodiment of an elevator having a ladder device in a pit of a hoistway will be described as an embodiment of the present invention, but first, the overall structure of the elevator will be described.

As shown in FIGS. 1 and 2 , elevator 1 includes hoistway 2 and car 3 . The hoistway 2 extends vertically in a multistory building. The car 3 ascends and descends in the hoistway 2 by driving the driving mechanism, and stops at a designated floor by stopping the driving of the driving mechanism.

A landing 20 on each floor includes a jamb 21, a landing door 22 and a threshold 23. - 特許庁The three-sided frame 21 is formed on the wall surface, and the inside of the frame serves as an opening (landing doorway) having a size corresponding to the opening of the car 3 . A landing door 22 moves laterally on a threshold 23 to open and close a landing doorway to enable people to get on and off. The landing door 22 is normally closed, and is opened and closed following the opening and closing operation of the car door 30 of the car 3 stopped on the floor. Further, the landing door 22 is opened by the worker when the worker performs work such as installation work, maintenance work, and inspection work. The threshold 23 is attached to the wall surface of the hoistway 2 along the lower edge of the landing doorway and so that both ends extend laterally beyond the lower edge of the landing doorway. More specifically, the threshold 23 is attached to the upper surface of a base 24 made of steel such as channel steel, etched steel, angle steel, etc., which is attached to the wall surface of the hoistway 2 , and the load of the threshold 23 is received by the base 24 .

The hoistway 2 has a pit 2A at the bottom. The bottom surface of the pit 2A is located below the floor surface of the landing doorway on the lowest floor. The distance (depth) from the floor of the landing doorway to the bottom of the pit 2A is, for example, 1.5 m or more. Moreover, the said depth is less than 3 m as an example.

The elevator 1 is provided with a ladder device 4 . The ladder device 4 is used when workers enter and leave the pit 2A.

<Embodiment 1 of Ladder Device 4>
As shown in FIGS. 3 and 4, the ladder device 4 includes a ladder 40, a string-like member 41, and a support portion . The ladder 40 is provided below the landing doorway in the pit 2A and attached to the wall surface of the pit 2A. More specifically, the threshold 23 (and the base 24) of the landing 20 protrudes from the wall surface of the pit 2A to form a laterally elongated projecting portion (overhang), and the ladder 40 is located in the space below the laterally elongated projecting portion 23 (and 24). provided in The string member 41 is provided separately from the ladder 40 . The support part 42 is provided above the entrance/exit of the landing, and suspends and supports the string-like member 41 so as to have a portion that hangs below the floor surface of the entrance/exit of the landing during use.

Ladder 40 includes side posts 40a (eg, made of metal and integrated by a joining method such as welding), steps 40b, and legs 40c. A pair of side pillars 40a are provided with an interval left and right. The side pillar 40a is provided along the wall surface of the pit 2A and along the vertical direction with a predetermined interval from the wall surface. The step 40b is provided horizontally between the pair of side pillars 40a, 40a with an appropriate space therebetween in the vertical direction. The leg 40c is provided rearward from the side pillar 40a with an appropriate space in the vertical direction, and fixes the ladder 40 to the wall surface of the pit 2A.

The cord-like member 41 is a flexible wire such as a rope, string, wire, chain, cable, cord, strand, or the like. The string member 41 has a length such that the upper end is positioned above the landing doorway and the lower end is positioned below the floor surface of the landing doorway. Preferably, the lower end of the string member 41 is below the upper end of the ladder 40, more preferably below the middle of the ladder 40 in the vertical direction, and above the lower end of the ladder 40 (or the bottom of the pit 2A). has a length located at As a result, the string-like member 41 has a portion that hangs downward from the tip of the laterally long projecting portion 23 (, 24).

The support portion 42 is provided on the upper frame member 21A, which is the upper side portion, of the jamb 21 bordering the landing doorway. The support part 42 is provided between the extension lines of the left and right width lines of the ladder 40 . Thereby, the string-like member 41 has a portion that hangs down in front of the ladder 40 . Preferably, the support portion 42 is provided on or in the vicinity of the extension line of the widthwise middle line of the ladder 40 . As a result, the string-like member 41 is positioned in the middle portion of the ladder 40 in the width direction.

As shown in FIG. 5, the support portion 42 is provided on the surface of the upper frame member 21A of the jamb 21 facing the hoistway 2 (vertical surface on the hoistway 2 side). The support portion 42 includes a recess 42a and a locking body 42b. The concave portion 42a is recessed to a predetermined depth from the surface and has an internal space. The engaging body 42b is, for example, a shaft arranged in a state in which both ends are supported within the recess 42a. The upper end of the string-like member 41 serves as a terminal engaging portion such as a hook with a detent or a carabiner, and the locking body 42b allows the terminal engaging portion 41a of the string-like member 41 to be detachable in the recess 42a. Lock.

The configuration of the elevator 1 according to this embodiment is as described above. Next, how to use the ladder device 4 will be described. As a premise, the operator moves the car 3 to a location other than the lowest floor, opens the hoistway 2 at the landing doorway on the lowest floor, and then opens the landing door from the landing 20 side using a special key. 22 is unlocked and the landing door 22 is opened.

The operator carries the string-like member 41, locks the end engaging portion 41a of the string-like member 41 to the locking body 42b of the support portion 42, and attaches the string-like member 41 to the support portion 42. drip. Then, the worker grabs the string-shaped member 41 to secure his/her own safety, and descends into the pit 2A using the ladder 40 to perform the work. Also, when the worker finishes work and climbs the ladder 40, the string-like member 41 is used as a hand grip. After use, the operator removes the string member 41 and takes it home.

As described above, according to the ladder apparatus 4 according to the present embodiment, the string-like member 41 is provided separately from the ladder 40, and when used, the string-like member 41 is attached to the support portion 42 and hung down. is used as a hand grip when climbing the ladder 40. When not in use, the string member 41 is simply removed. Therefore, according to the ladder device 4 according to this embodiment, it has a simple structure and can be used easily.

Further, according to the ladder device 4 according to the present embodiment, the support portion 42 is provided on the surface of the upper frame member 21A of the jamb 21 facing the hoistway 2, i.e., at a location not visible to passengers. . Therefore, according to the ladder device 4 according to the present embodiment, it is possible to provide the landing 20 that has the same appearance as that of a general elevator.

Further, according to the ladder device 4 according to the present embodiment, the support part 42 is provided so as not to protrude from the surface of the upper frame member 21A of the jamb 21 facing the hoistway 2 . Therefore, according to the ladder device 4 of the present embodiment, it is possible to prevent the support portion 42 from unintentionally contacting any movable portion of the constituent elements of the elevator 1 .

<Embodiment 2 of ladder device 4>
As shown in FIG. 6, the difference between the ladder device 4 according to the second embodiment and the ladder device 4 according to the first embodiment is the formation location of the support portion 42 . In the present embodiment, the support portion 42 is provided on the surface (lower surface) of the upper frame member 21A of the jamb 21 facing the hall doorway. As a result, the slant of the string-like member 41 suspended and supported by the support portion 42 is greater than the slant of the string-like member 41 according to the first embodiment. Therefore, the stability when using the string-like member 41 can be increased.

Other configurations of the ladder device 4 according to the second embodiment are the same as those of the ladder device 4 according to the first embodiment. The description of the same points will be omitted as they are the same as those of the first embodiment. The ladder device 4 according to the second embodiment also has the same effects as those of the ladder device 4 according to the first embodiment.

<Embodiment 3 of ladder device 4>
As shown in FIG. 7, the difference of the ladder device 4 according to the third embodiment from the ladder device 4 according to the first embodiment is the formation location of the support portion 42 . In this embodiment, the support portion 42 is provided near the upper frame member 21A of the jamb 21 on the surface facing the hoistway 2 . More specifically, as shown in FIG. 3, a horizontally elongated plate-shaped frame 25 is arranged along the upper edge of the upper frame member 21A of the jamb 21 so that both ends spread laterally beyond the upper edge of the landing doorway. is attached to the wall surface of the hoistway 2, a door rail 26 is attached to the frame 25, and the landing door 22 can be moved laterally by rolling the door hanger 22a having rollers on the door rail 26. 7, the support portion 42 is provided at a portion between the upper frame member 21A of the jamb 21 and the door rail 26 on the surface facing the hoistway 2 (the surface of the frame 25). In this case, the recessed portion 42 a of the support portion 42 is configured by a recessed portion of the frame 25 that is recessed along the recessed portion formed in the wall surface 2 a of the hoistway 2 . Alternatively, the recessed portion 42a of the support portion 42 may be configured by the recessed portion of the wall surface 2a by forming an opening at a portion of the frame 25 corresponding to the recessed portion of the wall surface 2a.

Other configurations of the ladder device 4 according to the third embodiment are the same as those of the ladder device 4 according to the first embodiment. The description of the same points will be omitted as they are the same as those of the first embodiment. The ladder device 4 according to the third embodiment also exhibits the same effects as the above-described effects that the ladder device 4 according to the first embodiment exhibits.

<Embodiment 4 of Ladder Device 4>
As shown in FIG. 8, the ladder device 4 according to Embodiment 4 differs from the ladder device 4 according to Embodiment 1 in the formation location and form of the support portion 42 . In the present embodiment, the support portion 42 is provided near the upper frame member 21A of the jamb 21 on the surface facing the hoistway 2 (the surface of the frame 25), as in the third embodiment. However, the support part 42 does not have the concave part 42a, and both ends of the locking body 42b are joined to the surface of the frame 25 by joining means such as welding, and protrude from the surface of the frame 25. As shown in FIG. Therefore, the locking body 42b is provided in a region (for example, a space between the left and right door hangers 22a, 22a) that does not come into contact with any movable parts of the components of the elevator 1. As shown in FIG.

Other configurations of the ladder device 4 according to the fourth embodiment are the same as those of the ladder devices 4 according to the first and third embodiments. The description of the same points will be omitted as they are the same as those of the first embodiment. The ladder device 4 according to the fourth embodiment also has the same effects as those of the ladder device 4 according to the first embodiment.

<Embodiment 5 of ladder device 4>
As shown in FIG. 9 , the ladder device 4 according to the fifth embodiment differs from the ladder device 4 according to the first embodiment in that it relates to the string-like member 41 . In the present embodiment, the string-like member 41 includes, for example, a knot of the string-like member 41 and an enlarged portion 41b configured as a separate member from the main body of the string-like member 41 . A plurality of enlarged portions 41b are provided at predetermined intervals. Alternatively, the enlarged portion 41b may be provided only where it is necessary. By providing the enlarged portion 41b, the operator can firmly grip the string-like member 41. As shown in FIG.

Other configurations of the ladder device 4 according to the fifth embodiment are the same as those of the ladder device 4 according to the first embodiment. The description of the same points will be omitted as they are the same as those of the first embodiment. The ladder device 4 according to the fifth embodiment also has the same effects as those of the ladder device 4 according to the first embodiment.

<Embodiment 6 of ladder device 4>
As shown in FIG. 10 , the ladder device 4 according to the sixth embodiment differs from the ladder device 4 according to the first embodiment in that it relates to the string-like member 41 . In the present embodiment, the string-like member 41 includes, for example, the string-like member 41 that is tied in a ring shape, or an annular portion 41c that is formed of a member separate from the main body of the string-like member 41 . A plurality of annular portions 41c are provided continuously. Alternatively, a plurality of annular portions 41c may be provided at predetermined intervals, or may be provided only at necessary locations. The provision of the annular portion 41 c also allows the operator to firmly grip the string-like member 41 .

Other configurations of the ladder device 4 according to the sixth embodiment are the same as those of the ladder device 4 according to the first embodiment. The description of the same points will be omitted as they are the same as those of the first embodiment. The ladder device 4 according to the sixth embodiment also has the same effects as those of the ladder device 4 according to the first embodiment.

It should be noted that the present invention is not limited to the above embodiments, and various modifications can be made without departing from the gist of the present invention.

In the above embodiment, the locking body 42b of the support portion 42 is a shaft. However, the invention is not limited to this. Various rigid bodies such as a ring can be used as the locking body.

In the above-described embodiment, the cord-like member 41 has a length such that the lower end portion is positioned below the floor of the landing doorway, and has a portion that hangs below the floor of the landing doorway. Having this portion stabilizes the string-like member 41 . However, the invention is not limited to this. If there is no safety problem, the string-like member has a length such that the lower end is positioned above the floor of the landing doorway or the lower end is positioned above the floor of the landing doorway. It may also be one that does not have a portion that hangs downward.

Also, as long as there is no physical interference, applying the technical elements described above to other embodiments or examples, replacing the technical elements described above with technical elements according to other embodiments or examples It is naturally possible to combine the technical elements described above, etc., and this is naturally intended by the present invention. For example, although the supporting portion 42 according to the fourth embodiment has a protruding form, it goes without saying that this supporting portion 42 can also be applied to the first to third, fifth and sixth embodiments.

Reference Signs List 1 elevator 2 hoistway 2A pit 2a hoistway wall 20 landing 20a landing wall 21 three-sided frame 21A upper frame member 22 landing door 22a door hanger 23... sill (horizontally long projecting part), 24... base (horizontally long projecting part), 25... frame, 26... door rail, 3... car, 30... car door, 4... ladder device, 40... ladder, 40a... side post, 40b Step 40c Leg 41 String-like member 41a End engaging portion (hook) 41b Expanding portion 41c Annular portion 42 Supporting portion 42a Concave portion 42b Locking body

Claims (5)

As a ladder device installed in the pit of the hoistway,
A ladder provided below the landing doorway on the lowest floor,
a string-like member separate from the ladder;
A support part provided above a landing doorway for suspending and supporting a string-like member so as to have a portion that hangs below a floor surface of the landing doorway when in use. The pit has a horizontally elongated protruding part protruding from the wall surface along the lower edge of the landing doorway,
The ladder is provided in the space below the horizontally elongated projection,
2. The elevator according to claim 1, wherein the string-like member has a portion that hangs downward from the tip of the laterally elongated projection and toward the front of the ladder in a state of being suspended and supported by the support. The support part is either the surface facing the hoistway or the surface facing the landing doorway of the upper frame member of the jamb of the landing doorway, or the vicinity of the upper frame member among the faces facing the hoistway. 2. The elevator according to claim 1, provided at a location of The string-like member has a terminal engaging portion,
4. The elevator according to claim 1 or 3, wherein the support portion includes a recess and a locking body that detachably locks the terminal engaging portion in the recess. 3. An elevator according to claim 1 or claim 2, wherein the cord-like member comprises one or more widenings or loops at appropriate points.

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