CN113548559B - Elevator device - Google Patents

Abstract

An object of the present invention is to provide an elevator apparatus capable of further improving safety during maintenance and inspection of a buffer or the like disposed directly below a counterweight. The elevator device has: a car and a counterweight (3), which are connected to each other by a main cable in the hoistway and rise and fall in opposite directions in the hoistway; and a buffer (12), which is arranged on a bottom of the hoistway The bottom pit (1a) is arranged under the balance weight (3). Furthermore, the elevator apparatus includes a protective net (11) fixed to a protective net fixing portion (pit base) (8) fixed to a pit (1a). The lower end portion of the protective net (11) is placed on the protective net fixing portion (8).

Description

Elevator device

technical field

The present invention relates to an elevator apparatus having a protective net that prevents an operator from entering a descending area of a counterweight.

Background technique

The elevator apparatus described in Unexamined-Japanese-Patent No. 2013-95571 (patent document 1) is known as background art which belongs to the technical field of this invention. The elevator device of Patent Document 1 has: the pit that is arranged at the bottom of the hoistway, and the foldable overhaul workbench that expands when the equipment in the hoistway is maintained and overhauled, and the protective net that prevents the operator from entering the descending area of the counterweight (refer to Summary).

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2013-95571

In the elevator apparatus of Patent Document 1, there is a gap from the pit at the bottom of the hoistway to the lower end of the protective net. A shock absorber (shock absorber) is provided in this gap portion, and the shock absorber prevents the balance weight from falling. In this case, during inspection of the buffer or the like, an operator may slip through the protective net and accidentally insert a tool or the like under the balance weight, and the balance weight may come into contact with the inserted tool or the like. Therefore, it is desired to further improve the safety during maintenance and inspection of the shock absorber and the like.

Contents of the invention

The problem to be solved by the invention

An object of the present invention is to provide an elevator apparatus capable of further improving safety during maintenance and inspection of a buffer or the like arranged directly below a counterweight.

Solution to the problem

In order to achieve the above object, the elevator device of the present invention has: the car and the counterweight, which are connected to each other by the main rope in the hoistway and ascend and descend in opposite directions to each other in the hoistway; The pit at the bottom is arranged below the balance weight, wherein,

The elevator apparatus has a protective net fixed to a protective net fixing portion fixed to the pit,

The lower end of the protective net is placed on the protective net fixing part.

Invention effect

According to the present invention, the gap between the pit at the bottom of the lifting passage and the lower end of the balance weight can be reduced, and the safety during maintenance can be further improved.

Problems, configurations, and effects other than those described above will be clarified by the description of the following embodiments.

Description of drawings

Fig. 1 is a diagram showing a schematic configuration of an elevator apparatus according to Embodiment 1 of the present invention, and is a sectional view showing a vertical section.

Fig. 2 is a diagram showing a schematic configuration of an elevator apparatus according to Embodiment 1 of the present invention, and is a sectional view showing a horizontal section.

Fig. 3 is a front view of the protective net according to Embodiment 1 of the present invention.

Fig. 4 is a plan view of the pit base on which the protective net of embodiment 1 is installed.

Fig. 5 is a side view of Fig. 3, showing a fixing structure of the protective net.

6 is a front view showing a configuration of a detection device for detecting installation of the protective net according to Example 1, and is a diagram showing a state before completion of installation.

7 is a front view showing the configuration of a detection device for detecting the installation of the protective net of Example 1, and is a diagram showing a state after installation is completed.

Fig. 8 is a front view of a protective net according to Embodiment 2 of the present invention.

Fig. 9 is a side view of Fig. 8, showing a fixing structure of the protective net.

Fig. 10 is a front view of a protective net according to Embodiment 3 of the present invention.

Fig. 11 is a side view of Fig. 10, showing a fixing structure of the protective net.

Fig. 12 is a front view of a protective net according to Embodiment 4 of the present invention.

Fig. 13 is a side view of Fig. 12, showing a fixing structure of the protective net.

Explanation of reference signs:

1... Lifting passage, 1a... Pit, 2... Car, 3... Counterweight, 5... Main cable, 7... Hoist, 8... Pit base (screen guard fixing part), 8A... Wide width The slit (first slit), 8Aa... the widening part of the first slit 8A, 8B... the insertion part (second slit) of the protective net 11, 10... the guide rail, 11... the protective net, 12... the buffer , 13...control section, 15...detection device, 18...protective net, 22...concrete block (fixed part of protective net), 23...bracket, 24...anchor bolt, 100...elevator device.

Detailed ways

Hereinafter, embodiments of the elevator apparatus of the present invention will be described with reference to the drawings. It should be noted that, in each figure, the same reference numerals are assigned to the same or similar structures, and overlapping descriptions will be omitted.

[Example 1]

Hereinafter, an elevator apparatus 100 according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2 . Fig. 1 is a diagram showing a schematic configuration of an elevator apparatus 100 according to Embodiment 1 of the present invention, and is a sectional view showing a vertical section. Fig. 2 is a diagram showing a schematic configuration of an elevator apparatus 100 according to Embodiment 1 of the present invention, and is a sectional view showing a horizontal section.

An elevator apparatus 100 according to an embodiment of the present invention is formed in a hoistway 1 formed in a building, and includes: a car 2 that moves up and down in the hoistway 1; direction; the main cable 5, which suspends the car 2 and the counterweight 3; the top pulley 6, which is arranged on the upper part of the lifting passage 1, and is wound with the main rope 5; the hoist 7, which is arranged on the top of the lifting passage 1 near the bottom, and drives the main rope 5; The two ends of the main rope 5 are fixed on the upper part of the hoistway 1 via the stopper 4, and the car 2 and the counterweight 3 are suspended in the middle of the stopper 4.

In addition, in the elevator device 100, the pit base 8 is disposed in the pit 1a at the bottom of the hoistway 1, the hoist 7 is supported on the pit base 8, and the guide rail 9 on the side of the car 2 and the guide rail 10 on the side of the counterweight 3 It is erected on the pit base 8. That is, the pit base 8 is fixed to the pit 1a, and constitutes a support portion (support member) for supporting the hoist 7 and the guide rails 9 and 10 . The guide rails 9 and 10 are fixed to the hoistway 1 by a guide rail bracket not shown.

It should be noted that the present invention is not limited to the structure of the elevator device 100 shown in FIG. 1 , and may be an elevator device of a different structure.

In addition, the elevator apparatus 100 has a guard net 11 and a buffer 12 . The protective net 11 prevents the operator from entering the lowering area (operation area) of the counterweight 3 . The buffer 12 buffers the counterweight 3 that has dropped abnormally for some reason.

The protective net 11 and the buffer 12 are supported on the pit base 8 . That is, the pit base 8 is provided with a protective net 11 and a buffer 12 in addition to the hoist 7 and the guide rails 9 and 10, and constitutes a supporting portion for supporting the hoist 7, the guide rails 9 and 10, the protective net 11 and the buffer 12. (supporting member, base). In particular, the pit base 8 fixes the lower end portion of the protective net 11, so it can be called a protective net fixing portion (protective net fixing member).

That is, the elevator apparatus 100 of the embodiment has: the car 2 and the counterweight 3, which are connected to each other by the main rope 5 in the hoistway 1, and ascend and descend in opposite directions to each other in the hoistway 1; and the buffer 12, which is arranged The pit 1a formed at the bottom of the lifting passage 1 is arranged under the counterweight 3 . Moreover, the elevator apparatus 100 is equipped with the guard net 11 fixed to the guard net fixing part (pit base) 8 fixed to the pit 1a. The lower end portion of the protective net 11 is placed on the protective net fixing portion 8 .

By placing the lower end of the protective net 11 on the protective net fixing part 8 , no vertical (vertical) gap is formed between the lower end of the protective net 11 and the protective net fixing part 8 .

In Example 1, the pit base 8 which constitutes the safety net fixing part and is provided in the pit 1a is provided. The pit base 8 is provided with a guide rail 10 and a shock absorber 12 for guiding the counterweight 3 , and supports the guide rail 10 and the shock absorber 12 .

By constituting the fixing portion of the protective net 11 with the pit base 8 as an existing component, an increase in the number of components can be suppressed, a reduction in the manufacturing cost of the elevator apparatus 100 can be achieved, and the space for installing the components can be narrowed.

Hereinafter, an example of the protective net 11 of the present invention will be described.

The protective net 11 according to the first embodiment of the present invention will be described in detail with reference to FIG. 3 , FIG. 4 and FIG. 5 . Fig. 3 is a front view of the protective net 11 according to the first embodiment of the present invention. Fig. 4 is a plan view of the pit base on which the protective net of embodiment 1 is installed.

Fig. 5 is a side view of Fig. 3, showing a fixing structure of the protective net.

As shown in Figure 4, for the pit base 8, a wide slit 8A protruding upward for the guide rail 10 and the buffer 12 and an insertion part (narrow and narrow) where the protective net 11 is inserted are provided on the upper surface (upper part). slit) 8B. That is, the slit width of the insertion portion 8B is narrower than the slit width of the slit 8A. In the wide slit 8A, a widened portion 8Aa is provided at a portion where the bumper 12 protrudes. The insertion portion 8B is formed parallel to the slit 8A, and is connected to the slit 8A via the widened portion 8Aa in the widened portion 8Aa of the slit 8A.

That is, the pit base 8 has a wide first slit 8A through which the guide rail 10 and the buffer 12 protrude upward, and a second slit narrower than the first slit 8A, which constitutes the insertion portion of the protective net 11 . Two slits 8B. The first slit 8A has a widened portion 8Aa at a portion where the bumper 12 protrudes upward. The second slit 8B is connected to the first slit 8A via the widened portion 8Aa.

As shown in FIGS. 3 and 4 , the lower end of the protective net 11 is inserted into the pit base 8 from an insertion portion (insertion opening) 8B, and is attached to the pit base 8 .

For example, as shown in FIG. 5 , the protective net 11 is fixed to the pit base 8 by a protective net fixing member 14 . In this case, the fixing portion fixed by the guard net fixing tool 14 is positioned below the insertion portion 8B.

That is, in the elevator apparatus 100, the pit base 8 has the insertion part 8B into which the protective net 11 is inserted in the upper part. In addition, the protective net 11 is inserted into the inner side of the pit base 8 through the insertion portion 8B, and is fixed to the pit base 8 at a position below the insertion portion 8B.

The protective net 11 is fixed to the side surface 8C of the pit base 8 on the car 2 side (the side opposite to the hoistway wall 1b side). In this case, the guard net 11 is held by the insertion portion 8B at a position parallel to the arrangement direction of the two guide rails 10 and away from the two guide rails 10 .

It should be noted that, in Embodiment 1, the protective net fixing member 14 is composed of fasteners (bolts and nuts).

6 and 7, the detection device 15 which detects the installation of the protective net 11 which concerns on Example 1 of this invention is demonstrated. Fig. 6 is a front view showing a configuration of a detection device 15 for detecting installation of the protective net 11 according to the first embodiment, and is a diagram showing a state before completion of installation. Fig. 7 is a front view showing the configuration of the detection device 15 for detecting the installation of the protective net 11 according to the first embodiment, and is a diagram showing a state after the installation is completed.

The elevator apparatus 100 has the detection device (installation detection device) 15 which detects the installation of the protective net 11. As shown in FIG. The detection device 15 is fixed on the pit base 8 . When the protective net 11 is installed in contact with the pit base 8 and the detection device 15 is turned on, the detection device 15 outputs an output signal to the control unit 13 that controls the drive unit (hoist) 7 of the elevator device 100 . The control unit 13 having received the output signal of the detection device 15 permits the lifting and lowering of the car 2 by the hoist 7 .

The detection device 15 is constituted by, for example, a mechanical switch as shown in FIGS. 6 and 7 . The mechanical switch (detection device) 15 has a contact 15 a that contacts the side edge of the protective net 11 . Cutouts 11a are formed at the corners of the lower end of the protective net 11, and when the protective net 11 is inserted into the pit base 8 from the insertion portion 8B, the contacts 15a of the mechanical switch 15 initially come into contact with the notches 11a. As the protective net 11 is inserted deeper into the pit base 8, the contact 15a moves toward the side edge portion of the protective net 11 along the cutout 11a. At the position where the lower end of the protective net 11 contacts the bottom 8D of the pit base 8, the contact 15a of the mechanical switch 15 reaches the side edge of the protective net 11, and the mechanical switch 15 is turned on.

In Embodiment 1, the lower end of the protective net 11 is inserted into the inner side of the pit base 8 , and the detection device 15 detects the position of the lower end of the protective net 11 . Therefore, the detection device 15 is arranged inside the pit base 8 . The detection device 15 is arranged inside the pit base 8 so as to be protected by the pit base 8 .

It should be noted that the detection device 15 is not limited to a mechanical switch, and may be constituted by a detection device other than a mechanical switch.

In Example 1, during normal operation, by fixing the protective net 11 to the pit base 8, the mechanical switch 15 is turned on, and the elevator car 2 is allowed to ascend and descend. In addition, when the operator performs operations in the pit, since there is no gap at the lower end of the protective net 11, it is possible to prevent the operator from drilling under the protective net 11 to perform operations, or to drill under the protective net 11 to remove tools, etc. Inadvertently inserting below the balance weight makes operators, tools, etc. contact with the balance weight 3 unintentionally.

When performing maintenance and inspection of the buffer 12 , the protective net fixing member 14 is removed, and the protective net 11 is taken out from the pit base 8 , thereby performing maintenance and inspection of the buffer 12 .

When the protective net 11 is taken out from the pit base 8, the mechanical switch 15 becomes a switch-off state, and the power supply of the elevator apparatus 100 is cut off by the control part 13.

That is, the elevator apparatus 100 includes: a hoist 7 for applying a driving force to the main rope 5, a control unit 13 for controlling the operation of the hoist 7, and a device for detecting the installation state of the safety net 11 with respect to the safety net fixing portion (pit base) 8. Detection device 15. The control unit 13 controls the operation of the winch 7 based on the signal from the detection device 15, and when the detection device 15 detects the non-installed state (ie, the uninstalled state) of the protective net 11 relative to the protective net fixing part 8, the hoisting machine is stopped. 7 moves.

Thereby, by lowering the counterweight 3 due to an abnormal operation, it is possible to prevent contact accidents of workers, tools, and the like with the counterweight 3 , and it is possible to further improve safety during maintenance and inspection. In this way, at the time of maintenance and inspection, the operator performs maintenance and inspection of the buffer 12 in a state where the protective net 11 is removed and the power supply of the elevator apparatus 100 is cut off.

According to the present embodiment, by installing the protective net 11 in contact with the pit base 8, height adjustment of the protective net 8 is not required, and installation workability can be improved.

Furthermore, since the protective net 11 is inserted and fixed to the pit base 8, even in the arrangement of the hoistway 1 with a narrow gap between the car 2 and the counterweight 3 as shown in FIG. The structure of the pit base 8 prevents the interference of the protective net 11 and the car 2 during normal operation.

[Example 2]

Next, another embodiment (embodiment 2) of the protective net 11 of the present invention will be described with reference to FIG. 8 and FIG. 9 . Fig. 8 is a front view of a protective net 11 according to Example 2 of the present invention. FIG. 9 is a side view of FIG. 8 , and is a diagram illustrating a fixing structure of the protective net 11 .

When the moving distance of the car 2 and the counterweight 3 in the lifting direction is long, the length of the main rope 5 connecting the car 2 and the counterweight 3 from the hoist 7 to the car 2 varies depending on the position of the car 2 . In this case, due to the weight of the main cable 5 itself, the difference between the weight of the main cable 5 on the car 2 side of the hoist 7 and the weight on the counterweight 3 side increases. In order to reduce this difference in weight, a compensating member 16 is provided.

In Embodiment 2, the point of change compared with Embodiment 1 is that, in order to correspond to the elevator apparatus 100 provided with the compensating member 16, the structure which avoids the interference of the compensating member 16 and the guard net 11 is adopted. As this modification, as shown in FIG. 8 , a hole 11 b for passing the compensating member 16 connecting the car 2 and the counterweight 3 and a compensating member guide rod 17 for guiding the compensating member 16 are provided in the protective net 11 .

The other configurations are basically the same as in Example 1, and in Example 2, the same effects as those in Example 1 can be obtained.

In the elevator apparatus 100 of the second embodiment, in addition to the operational effect obtained in the first embodiment, as shown in FIG. 9 , interference between the compensating member 16 and the protective net 11 can be avoided. In Example 2, although the hole 11b through which the compensating member 16 passes is opened, the hole 11b is small, and entry of an operator is suppressed. In addition, since the compensating member 16 exists in the hole 11b, it is possible to suppress the movement of an operator who inserts a tool or the like into the hole 11b. Thus, also in the safety net 11 of Example 2, it has the structure which suppresses an operator, a tool, etc. from entering the descending area|region of the counterweight 3. As shown in FIG.

[Example 3]

Next, still another embodiment (embodiment 3) of the protective net 11 of the present invention will be described with reference to FIG. 10 and FIG. 11 . Fig. 10 is a front view of a protective net according to Embodiment 3 of the present invention. Fig. 11 is a side view of Fig. 10, showing a fixing structure of the protective net.

Conventionally, the minimum height from the pit 1a to the upper end of the protective net 11 was sometimes prescribed. In Example 3, the point of change when compared with Example 1 is that the additional guard net 18 is added and the height of the guard net 11 is raised. The other configurations are basically the same as those of Example 1, and also in Example 2, the same effects as those of Example 1 can be obtained. It should be noted that Embodiment 3 may also be applicable to the structure of Embodiment 2.

The protective net 11 is fixed to the additional protective net 18 by, for example, an additional protective net fixing member 19 , and the additional protective net 18 is fixed by a bracket 20 and a bracket fixing member 21 fixed to the counterweight side guide rail 10 . The additional fence fixing member 19 is constituted by fasteners (bolts and nuts), and the bracket holder 21 is also constituted by fasteners (bolts and nuts).

In Embodiment 3, the structure in which an additional protective net 18 is added to the protective net 11, but if the structure is changed in view, then the protective net 11 and the protective net 18 constitute a protective net 11, 18, which is equivalent to a protective net. 11 and 18 are divided into the structure of the 1st protective net 11 and the 2nd protective net (additional protective net) 18.

In Example 3, the guard nets 11 and 18 are fixed to the guide rail 10 via the bracket 20 fixed to the guide rail 10 at a position above the guard net fixing portion (pit base) 8 . The fixing structure of the protective nets 11 and 18 using the bracket 20 and the bracket fixing member 21 can also be applied to fixing the upper part of the protective net 11 to the guide rail 10 in the first embodiment in which the protective net is only composed of the protective net 11 .

In addition, since the 1st protective net 11 is a protective net member arrange|positioned at the lower side, it may also be called a lower protective net member. In addition, since the 2nd guard net 18 is a guard net member arrange|positioned at the upper side, it may also be called an upper guard net member.

In the protective nets 11 and 18 of Example 3, in addition to the effects obtained in Example 1, as shown in Figures 10 and 11, by increasing the height of the protective net 11, it becomes possible to improve the ability to prevent the operator from entering the counterweight. 3. The structure of the height of the drop zone. In addition, since the additional protective net 18 is added to the protective net 11, the protective net 11 can be used as a common component among a plurality of models, and the manufacturing cost of the elevator apparatus 100 can be reduced.

[Example 4]

Next, still another embodiment (embodiment 4) of the protective net 11 of the present invention will be described with reference to FIG. 12 and FIG. 13 . Fig. 12 is a front view of a protective net according to Embodiment 4 of the present invention. Fig. 13 is a side view of Fig. 12, showing a fixing structure of the protective net.

In the elevator apparatus 100 in which the pit foundation 8 is not provided, for example, a concrete block 22 as shown in FIG. The concrete block 22 constitutes a support portion (support member) that supports the guide rail 10 and the shock absorber 12 .

In Example 4, the elevator apparatus 100 provided with the concrete block 22 instead of the pit foundation 8 is made into object. Therefore, the point of change compared with Example 1 is that the structure which fixed the protective net 11 to the concrete block 22 with the bracket 23 was employ|adopted. In Example 4, the protective net 11 is supported by the concrete block 22 in addition to the guide rail 10 and the buffer 12 . That is, the concrete block 22 is mounted with the guide rail 10, the buffer 12, and the guard net 11, and comprises the support part (support member, a base) which supports the guide rail 10, the buffer 12, and the guard net 11. In particular, since the lower end part of the fence 11 is fixed, the concrete block 22 can be called a fence fixing part (a fence fixing member).

The other structures are basically the same as those in Example 1, and the same functions and effects as those in Example 1 can be obtained in Example 4 for the same structural parts as in Example 1. In addition, the points of change in the second and third examples can be applied to the fourth example.

As shown in FIG. 12, in order to fix the protective net 11 to the concrete block 22, the bracket 23 is provided. Anchor bolts 24 are fixed to the concrete block 22 . The bracket 23 is fixed to the concrete block 22 by anchor bolts 24 . In addition, as shown in FIG. 13 , the protective net 11 is fixed to the bracket 23 by the protective net fixing tool 14 described in the first embodiment.

That is, in Example 4, the concrete block 22 which comprises a safety net fixing part and is fixed to the pit 1a is provided. The protective net 11 is fixed to the anchor bolts 24 of the concrete block 22 via the bracket 23 .

It should be noted that the detection device (mechanical switch) 15 described in the first embodiment is fixed to the bracket 23 .

In the elevator device 100 of Embodiment 4, since the lower end of the protective net 11 is in contact with the concrete block 22, there is no gap at the lower end of the protective net 11, so there is no need for the operator to worry about drilling under the protective net 11 to carry out work. Or drill through the bottom of the protective net 11 and accidentally insert a tool or the like under the balance weight, which can further improve the safety during maintenance and overhaul.

In addition, the fixed position of the bracket 23 relative to the concrete block 22 can be adjusted using the bracket 23, for example. As shown in FIG. Interference between the protective net 11 and the car 2 during normal operation.

It should be noted that, in Embodiment 4, even if it is a structure in which the bracket 23 is directly fixed to the bottom pit 1a without installing the concrete block 22, it can be applied similarly. In this case, the anchor bolt 24 is installed in the pit 1a, and is fixed to the pit 1a. That is, the protective net 11 is fixed to the anchor bolt 24 fixed to the pit 1a via the bracket 23. As shown in FIG. In this structure, there is no need to provide protective net fixing parts such as the pit base 8 and the concrete block 22, and the number of parts can be reduced.

The support part (support member, base) which mounts the guide rail 10, the buffer 12, and the protective net 11, and supports the guide rail 10, the buffer 12, and the protective net 11 is comprised by the pit 1a. The pit 1a constitutes a net fixing portion (a net fixing member) for fixing a lower end portion of the net 11 . In this case, the protective net 11 is fixed to the pit 1a so that the lower end portion thereof comes into contact with the pit 1a as a protective net fixing portion.

In addition, the height adjustment of the protective net 11 in this Example can be implemented by combining with the structure (form) of the change point of Example 3. In this case, the same effects as in Example 3 can be obtained.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but includes various modified examples. For example, the above-described embodiments have been described in detail for easy understanding and description of the present invention, and are not necessarily limited to all configurations. In addition, a part of the structure of a certain example can be replaced with the structure of another example, and the structure of another example can also be added to the structure of a certain example. In addition, addition, deletion, and replacement of other configurations can be performed on part of the configurations of the respective embodiments.

Claims (4)

1. An elevator apparatus comprising: a car and a counterweight, which are connected to each other by main cables in an elevator passage and ascend and descend in directions opposite to each other in the elevator passage; The bottom pit is arranged under the balance weight, and it is characterized in that, The elevator apparatus includes a protective net fixed to a protective net fixing portion fixed to a pit, the lower end of the protective net is placed on the protective net fixing portion, The elevator apparatus includes a pit base constituting a protective net fixing portion and provided in the pit, The pit base mounts the buffer and a guide rail for guiding the counterweight, and supports the guide rail and the buffer, The pit base has an insertion portion on the upper part for the protective net to be inserted into, The protective net is inserted into the inner side of the pit base through the insertion portion, and fixed to the pit base at a position lower than the insertion portion, The pit base has a wide first slit through which the guide rail and the buffer protrude upward, and an insertion portion constituting the protective net, and the slit width is narrower than the first slit. the second slit of The first slit has a widened portion at a portion where the bumper protrudes upward, The second slit is connected to the first slit via the widened portion. 2. Elevator installation according to claim 1, characterized in that, The elevator apparatus includes: a hoist that applies a driving force to the main rope; a control unit that controls the operation of the hoist; and a detection device that detects the installation state of the protective net relative to the protective net fixing part. , The control unit controls the operation of the winch based on the signal from the detection device, and stops the operation of the hoist when the detection device detects that the protective net is not attached to the protective net fixing part. The action of the windlass. 3. Elevator installation according to claim 1, characterized in that, The protective net is fixed to the guide rail via a bracket fixed to the guide rail at a position above the protective net fixing portion. 4. Elevator installation according to claim 2, characterized in that, The detection device is arranged inside the base of the pit.

Images