CN109795931B

CN109795931B - Installation tool clamp for sling of elevator

Info

Publication number: CN109795931B
Application number: CN201810977512.1A
Authority: CN
Inventors: 前田亮; 中山真人
Original assignee: Hitachi Ltd
Current assignee: Hitachi Ltd
Priority date: 2017-11-17
Filing date: 2018-08-24
Publication date: 2021-04-02
Anticipated expiration: 2038-08-24
Also published as: JP2019089656A; CN109795931A; JP6811161B2

Abstract

Since the slings covered with the resin have a curl mark, even if the slings are hung downward when the slings are attached, the slings cannot be hung straight, and the slings are twisted together to cause interference. Twisting of the slings may interfere with the equipment in the hoistway, cause catching, and the like, and adversely affect the winding operation of the slings. The installation tool clamp of the sling for the elevator comprises a belt wheel (21) for winding the sling (5), a shaft (22) for supporting the belt wheel (21) to be rotatable, a heavy object (23) for applying tension to the sling (5), and two brackets (24, 24a, 24b) for connecting two ends of the shaft (22) and the heavy object (23), wherein a gap is formed between at least one bracket (24a) of the two brackets (24, 24a, 24b) and the heavy object (23), and an opening and closing fitting (25) which can block the gap and can be detached is arranged on at least one bracket (24 a).

Description

Installation tool clamp for sling of elevator

Technical Field

The invention relates to a mounting tool clamp for a sling for an elevator.

Background

Generally, an elevator car of an elevator is suspended by a rope, the rope is wound around a drive sheave of a hoisting machine, and the elevator car is raised and lowered by transmitting a driving force by friction between a rope groove on the sheave surface and the rope.

However, for example, in a machine room-less elevator in which a hoisting machine is installed in an elevator shaft, the size of the hoisting machine is reduced in order to reduce the space in the elevator shaft. As a means for realizing this, there is a reduction in the diameter of the drive sheave. By reducing the diameter of the drive sheave, the torque of the hoist can be reduced, and the size of the motor can be reduced.

However, since the diameter of the drive sheave needs to be 40 times or more the diameter of the hoist rope (elevator specification: EN 81-20/505.5.2.1), the diameter of the hoist rope must be reduced. Since the strength of the rope is proportional to the square of the diameter (proportional to the cross-sectional area), when a thin rope is used, the number of ropes must be increased, but this increases the axial dimension of the sheave, and thus the rope becomes a hoist having a long trunk and the layout of the hoistway is degraded. Therefore, a sling with a small diameter and high strength is desired.

As a structure for making the sling stronger, for example, as disclosed in patent document 1, a technique for covering the sling with resin is proposed. The suspension rope disclosed in patent document 1 is configured such that a stranded wire is produced by stranding bare steel wires, the stranded wire is covered with an intermediate covering material in a plurality of bundles, and the intermediate covering material and the stranded wire group are further covered with a resin material. Since the friction coefficient of the rope covered with the resin is high, the winding operation to the drive sheave whose rotation is restricted by the brake is deteriorated when the elevator is installed. Therefore, in the technique described in patent document 1, the sliding member is provided in the groove of the drive sheave, and the operation of winding the rope covered with the resin can be easily performed.

Prior art documents

Patent document 1: japanese patent laid-open publication No. 2015-74544

The slings are generally carried in a state of being wound around a drum. The slings covered with the resin are also transported in a state of being wound around the drum. When the elevator is installed, the suspension cable is pulled out from the drum and is wound around the drive sheave, the elevator car, and the counterweight.

However, since the rope covered with the resin as described in patent document 1 is easily scratched by being wound around the drum and is made lightweight by the resin, the scratch cannot be removed even if the rope is pulled out from the drum and hangs down.

Therefore, in the technique described in patent document 1, even if the suspension ropes are suspended downward when the elevator is installed, the suspension ropes cannot be suspended straight, and the suspension ropes are twisted together to cause interference. Twisting of the slings may interfere with the equipment in the hoistway, cause catching, and the like, and adversely affect the winding operation of the slings.

In the technique described in patent document 1, the operation of winding the rope on the drive sheave is easy, but it is not considered at all how to cope with the problem peculiar to the rope covered with resin, that is, the winding mark.

Disclosure of Invention

The present invention has been made to solve the above problems, and an object of the present invention is to provide a tool for installing a rope, which improves a winding work of a rope covered with resin.

In order to achieve the above object, the present invention provides a tool for installing an elevator sling, comprising: a sling contact member around which a sling is wound; a weight for applying tension to the sling; and a connecting member connecting the sling contact member and the weight.

In addition, the present invention is characterized in that the installation jig for the elevator suspension cable includes: a pulley around which a sling is wound; a shaft rotatably supporting the pulley; a weight for applying tension to the sling; and two brackets that connect both ends of the shaft and the weight, wherein a gap is formed between at least one of the two brackets and the weight, and an opening/closing member that closes the gap and is attachable/detachable is provided on the at least one bracket.

Effects of the invention

According to the present invention, a tool for installing a sling that improves the operation of winding a sling covered with resin can be provided.

Drawings

Fig. 1 is an overall configuration diagram of an elevator according to a first embodiment of the present invention.

Fig. 2 is an overall configuration diagram in a normal elevator installation.

Fig. 3 is an overall configuration diagram of an elevator in installation using a resin covered sling.

Fig. 4 is an external perspective view of a sling mounting jig for an elevator according to a first embodiment of the present invention.

Fig. 5 is a diagram illustrating a method of attaching a resin covered sling according to a first embodiment of the present invention.

Fig. 6 is an external perspective view of a sling mounting jig for an elevator according to a second embodiment of the present invention.

Fig. 7 is an external perspective view of a sling mounting fixture for an elevator according to a third embodiment of the present invention.

Fig. 8 is an external perspective view showing an example of use of a tool for installing a suspension wire in an elevator according to a fourth embodiment of the present invention.

Description of reference numerals:

1, an elevator;

2, lifting the channel;

3 an elevator car;

3a platform;

4, balancing weight;

5, slings;

6, a winch;

7a steering pulley;

7b a steering pulley;

8 a building beam;

9 a sling termination portion;

10 a wiring tape;

20, mounting a tool clamp;

20a, installing a tool clamp;

20b, mounting a tool clamp;

21 a pulley;

22 shafts;

23, a weight;

24a bracket;

24b a bracket;

25 an opening and closing fitting;

26 hooks;

27 hooks;

27a arm portion;

27b a hook portion;

28 connecting rods;

30 bolts;

30a bolt;

30b a bolt;

40 belt wheels;

60 drive the pulley.

Detailed Description

Hereinafter, an embodiment of a tool holder for attaching a suspension cable according to the present invention will be described with reference to the drawings. The present invention is not limited to the following examples, and various modifications and application examples are included in the scope of the present invention within the technical spirit of the present invention.

Example 1

A first embodiment of the present invention will be described with reference to fig. 1 to 5. Fig. 1 is an overall configuration diagram of an elevator according to a first embodiment of the present invention.

As shown in fig. 1, an elevator 1 according to the first embodiment includes an elevator car 3 and a counterweight 4 that move in the vertical direction in a hoistway 2 provided in a building, a rope 5 that supports the elevator car 3 and the counterweight 4, a hoist 6 that moves the elevator car 3 and the counterweight 4 in the vertical direction, and a plurality of turning pulleys 7 that are provided on the top of the hoistway 2 and around which the rope 5 is wound; and a sling termination portion 9 for securing the termination of the sling 5 to a building beam 8 extending from the building. The counterweight 4 is provided with a pulley 40, and a rope 5 is wound around a rope groove of the pulley 40. The hoist 6 is provided with a drive pulley 60, and a rope 5 is wound around a rope groove of the drive pulley 60. In the first embodiment, the hoist 6 is provided at the lower portion in the hoistway 2, but for example, the hoist 6 may be provided at the upper portion in the hoistway 2, or the hoist 6 may be provided in the machine room.

Fig. 2 is an overall configuration diagram in a normal elevator installation. Before the suspension ropes 5 are installed, the elevator car 3 is not completely assembled, but is assembled to a platform 3a that is a part of the elevator car 3 and suspended by a winch (not shown) provided at the top in the hoistway 2. The bundle of slings 5 is set on the platform 3a, and the counterweight 4 is placed in the lowermost position in the hoistway 2.

When the slings 5 are installed from this state, basically, one of the sling terminal portions 9 is first fixed to the building beam 8, and then the slings 5 are passed through the turning pulleys 7 provided on the top of the building beam 8, and the slings 5 are suspended in a U-shape toward the counterweight 4 and the hoist 6 provided at the lower portion of the hoistway 2. Then, the rope 5 hanging from above is wound around the pulley 40 of the counterweight 4 and the drive pulley 60 of the hoist 6, and the rope 5 is attached to each device of the elevator 1.

An example of a case where the resin covered sling is used will be described with reference to fig. 3. Fig. 3 is an overall configuration diagram of an elevator in installation using a resin covered sling. In the case of a resin-covered sling, since the winding mark of the sling is difficult to remove, when the sling 5 is hung in a U-shape, the sling 5 is twisted together without being hung straight downward. Since the resin covered sling has a light weight, it is difficult to hang down straight downward by interacting with the curl mark. Therefore, the mounting work becomes difficult because the suspension cable 5 is caught by the bracket and the beam in the hoistway 2 due to interference.

Means for solving this problem will be described with reference to fig. 4 and 5. Fig. 4 is an external perspective view of a sling mounting jig for an elevator according to a first embodiment of the present invention.

In fig. 4, the mounting jig 20 includes a pulley 21 (a sling contact member) capable of simultaneously winding a plurality of slings 5, a shaft 22 rotatably supporting the pulley 21, a weight 23 for applying tension to the slings 5, two brackets 24(24a, 24b) as connecting members for connecting the shaft 22 and the weight 23, and an opening/closing attachment 25 as an opening/closing member for attaching and detaching the slings 5 to and from the mounting jig 20. The opening/closing metal fitting 25 is provided on one of the

brackets

24a and 24b, and connects the bracket 24 and the weight 23.

In the present embodiment, the opening/closing metal fittings 25 are provided on the bracket 24a, but may be provided on both the

brackets

24a and 24 b. The bracket 24a and the opening/closing metal fitting 25 are fixed by a bolt 30(30 a). The weight 23 and the opening/closing member 25 are fixed by a bolt 30(30 b). Then, the opening/closing metal fittings 25 can be detached from the two brackets 24a by detaching the

bolts

30a, 30 b. The opening/closing metal fitting 25 is provided in at least one of the two

brackets

24a and 24 b.

The pulley 21 needs to be grooved in accordance with the number of slings 5 to be simultaneously attached, but a plurality of pulleys having only one groove may be arranged in parallel in accordance with the number of slings. In the case where a plurality of pulleys are arranged side by side, each pulley is pivotally supported by the shaft 22 so as to be rotatable on the carrier 24.

The mass required for the weight 23 varies depending on the number of slings 5 to be hooked on the pulley 21, but if a load of about 5kg is not applied to each sling, the slings 5 do not hang downward. Therefore, in the present embodiment, it is desirable to set the maximum mass to about 15kg in consideration of the mounting workability. In addition, since there is a possibility that twisting occurs when the number of the slings 5 caught on the pulley 21 is one, the number of the slings 5 caught on the pulley 21 is preferably at least two (a plurality of) or more.

Therefore, the slings 5 can be formed into 2-3 slings at the same time. In the present embodiment, three sling grooves are formed in the pulley 21.

Next, a method of installing the suspension rope 5 using the mounting jig 20 will be described with reference to fig. 5. Fig. 5 is a diagram illustrating a method of attaching a resin covered sling according to a first embodiment of the present invention.

Before the suspension ropes 5 are installed, the elevator car 3 is not completely assembled, but a platform 3a which is a part of the elevator car 3 is assembled and suspended by a winch (not shown) provided at the top in the hoistway 2. The bundle of slings 5 is set on the platform 3a, and the counterweight 4 is placed at the lowest part in the hoistway 2.

When the hoist rope 5 is to be attached, first, after one end portion 9 of the hoist rope is fixed to the building beam 8 (a step of fixing one end of the hoist rope 5 to the building beam 8), the hoist rope 5 is passed through two turning pulleys 7 provided on the ceiling portion of the building beam 8, that is, the first turning pulley 7a and the second turning pulley 7b (a step of passing the hoist rope through the first turning pulley 7a and the second turning pulley 7b provided on the building beam 8). Next, the first mounting jig 20a is mounted on the suspension rope 5 between the suspension rope terminal end portion 9 and the first turning pulley 7a (a step of mounting the first mounting jig 20a on the suspension rope 5 between the suspension rope terminal end portion 9 and the first turning pulley 7 a). When the first mounting tool 20a is mounted, the

bolts

30a and 30b are loosened, and the opening/closing metal 25 is detached from the weight 23 and the bracket 24. When the opening/closing tool 25 is removed, a gap is formed between the weight 23 and the bracket 24, the wire 5 is inserted through the gap, and the wire 5 is wound around the wire groove of the pulley 21. Thereafter, the opening/closing metal 25 is attached to the weight 23 and the bracket 24 with the

bolts

30a and 30b, and the gap is closed. Thereby, the first mounting tool 20a is mounted to the suspension wire 5. After the completion, the first mounting jig 20a is hung down (step of hanging down the first mounting jig 20 a). The suspension cable 5 is pulled by the mounting jig 20a, and hangs down in a U-shape. The pulley 21 of the mounting jig 20a rotates and pulls the hoist cable 5 downward. In the present embodiment, since the pulley 21 of the mounting jig 20a rotates and pulls the slings, even if the slings are covered with resin having a high friction coefficient, the mounting jig 20a and the slings 5 can be easily moved downward.

Further, a second mounting jig 20b is mounted on the hoist rope 5 between the first diverting pulley 7a and the second diverting pulley 7b (a step of mounting the second mounting jig 20b on the hoist rope 5 between the first diverting pulley 7a and the second diverting pulley 7 b). Since the attachment of the suspension wire 5 to the second attachment jig 20b is the same as the first attachment jig 20a, the description thereof is omitted. After the suspension cable 5 is attached to the second mounting jig 20b, the second mounting jig 20b is hung downward (step of hanging the second mounting jig 20b downward). The suspension cable 5 is pulled by the mounting jig 20b to be U-shaped and hang downward. In the present embodiment, the pulley 21 of the mounting tool 20b rotates and pulls the slings, so even if the slings are covered with resin having a high friction coefficient, the mounting tool 20b and the slings 5 can be easily lowered downward.

When the first mounting tool 20a and the second mounting tool 20b reach the bottom of the elevator shaft 2, the slings 5 are removed from the first mounting tool 20a and the second mounting tool 20b (a step of removing the slings 5 from the first mounting tool 20a and the second mounting tool 20 b). When the suspension wire 5 is detached from the first attachment jig 20a and the second attachment jig 20b, the opening/closing metal fitting 25 is detached from the weight 23 and the bracket 24, and the suspension wire 5 is pulled out from the gap between the weight 23 and the bracket 24, as in the case of attaching the suspension wire 5. This completes the removal of the slings 5. In the present embodiment, since the opening/closing metal fitting 25 which closes the gap and is detachable is provided, the attachment and detachment of the suspension wire 5 to the attachment jig 20 can be easily performed.

The hoist rope 5 detached from the first mounting tool holder 20a is wound around the pulley 40 of the counterweight 4. Further, the hoist rope 5 detached from the second mounting jig 20b is wound around the drive pulley 60 of the hoist 6. It should be noted that the positions of the counterweight 4 and the hoist 6 may be changed, and the hoist rope 5 detached from the first mounting jig 20a may be wound around the drive pulley 60 of the hoist 6, and the hoist rope 5 detached from the second mounting jig 20b may be wound around the pulley 40 of the counterweight 4 (step of winding the hoist rope 5 detached from the first mounting jig 20a and the second mounting jig 20b around the counterweight 4 and the hoist 6).

Next, the suspension rope 5 is wound around the lower portion of the platform 3a constituting the bottom of the elevator car 3 (a process of winding the suspension rope 5 around the elevator car 3), and the suspension rope terminal portion 9 of the suspension rope 5 is fixed to the building beam 8 (a process of fixing the other end of the suspension rope 5 to the building beam).

When the rope 5 is formed in a U-shape and is lowered, the rope may be twisted while being lowered. Therefore, it is desirable to make the slings 5 which are simultaneously lowered into two or more pieces. In the present embodiment, since the plurality of slings 5 can be wound simultaneously for work, work efficiency can be improved.

According to the present embodiment, when the rope covered with the resin is formed in a U shape and hangs down, since the jig is hung and attached to the rope, it is possible to suppress interference with the equipment in the hoistway due to twisting of the rope, and to improve the operation of winding the rope.

Example 2

Next, a second embodiment of the present invention will be described with reference to fig. 6. Fig. 6 is an external perspective view of a sling mounting jig for an elevator according to a second embodiment of the present invention. The same reference numerals are given to the same structures as those of the first embodiment, and the description thereof is omitted.

In the second embodiment, instead of the pulley 21 of the mounting tool holder 20 in the first embodiment, a hook 26 (sling contact member) is provided. The hook 26 is formed in a U shape with its lower part opened, and a plurality of the U-shaped parts are provided in accordance with the number of slings provided. In this embodiment, three U-shaped hooks are provided to be connected to each other so as to suspend three slings.

An opening/closing attachment 25 is provided to a bracket 24a connected to the hook 26, and the bracket 24a is connected to the weight 23. In the present embodiment, the opening/closing metal fittings 25 are provided on the bracket 24a, but may be provided on both the

brackets

24a and 24 b. The

brackets

24a and 24b function as connecting members for connecting the weight 23 and the hook 26. The bracket 24a and the opening/closing metal fitting 25 are fixed by a bolt 30(30 a). The weight 23 and the opening/closing member 25 are fixed by a bolt 30(30 b). Then, the opening/closing metal fitting 25 can be detached from the weight 23 and the bracket 24a by detaching the

bolts

30a and 30 b.

After the opening/closing tool 25 is removed, the sling 5 is inserted through a gap between the bracket 24a and the weight 23, and the sling 5 is wound around the U-shaped portion. After the opening/closing metal fitting 25 is attached, the attachment jig 20 is hung downward. The suspension cable 5 slides in the U-shaped portion and moves downward while being pulled by the mounting jig 20.

As described in the first embodiment, the friction coefficient of the sling covered with resin is high. For this reason, in the present embodiment, a sliding member is provided at a U-shaped portion of the hook 26 which comes into contact with the slings 5. As the sliding member, a member made of a polyoxymethylene resin, a polyamide resin, or a polytetrafluoroethylene resin may be provided.

Further, according to the present embodiment, since the contact portion with which the suspension cable comes into contact is formed as the hook, it is possible to provide a mounting tool holder having a simple structure and low cost.

Example 3

Next, a third embodiment of the present invention will be described with reference to fig. 7. Fig. 7 is an external perspective view of a sling mounting fixture for an elevator according to a third embodiment of the present invention. The same components as those in the first and second embodiments are denoted by the same reference numerals, and descriptions thereof are omitted.

In the third embodiment, a hook 27 having an open portion is provided instead of the hook 26 of the mounting tool holder 20 in the second embodiment. One end of the hook 27 is constituted by an arm portion 27a (connecting member) connected to the weight 23 via a link 28, and the other end is constituted by an open hooking portion 27b (sling contact member). The hook 27 has a plurality of engaging portions 27b corresponding to the number of slings. In the present embodiment, there are no three catching portions 27b for suspending three slings. The arm portion 27a is provided with a link 28 connected to the weight 23. The link 28 has a rotation axis in the same direction as the longitudinal direction of the suspension wire 5 engaged with the engaging portion 27b of the hook 27, and rotates the hook 27 in a direction orthogonal to the longitudinal direction of the suspension wire 5 (the arm portion 27a is rotatable with respect to the weight 23 via the link 28).

When the suspension cable 5 is attached to the mounting tool 20, the hook 27 is rotated (the hook 27 is laid down) so that the opening of the engaging portion 27b, which is the other end of the hook 27, is positioned upward. Then, the sling 5 is inserted from the open part of the engaging part 27b, and the sling 5 is engaged with the engaging part 27 b. Thereafter, the hook 27 is rotated so that the arm portion 27a is perpendicular (the hook 27 is raised). At this time, an urging mechanism may be provided so that the arm portion 27a becomes vertical. The distance between the adjacent hooks 27 is preferably set to a range narrower than the diameter of the sling 5 when the hooking portion 27b approaches. This prevents the mounting tool 20 from falling when the suspension cable 5 falls off from the engaging portion 27 b.

As described in the first embodiment, the friction coefficient of the sling covered with resin is high. For this reason, in the present embodiment, a sliding member is provided at a portion of the hooking portion 27b of the hook 27 which comes into contact with the slings 5. As the sliding member, a member made of a polyoxymethylene resin, a polyamide resin, or a polytetrafluoroethylene resin may be provided.

According to the present embodiment, when the rope covered with the resin is formed in a U shape and hangs down, since the tool holder is hung and attached to the rope, it is possible to suppress interference with the equipment in the hoistway due to twisting of the rope, and to improve the operation of winding the rope.

In addition, according to the embodiment, since the mounting tool 20 can be attached to and detached from the hoist rope 5 only by rotating the hook 27, the opening and closing of the attachment is not required, and the efficiency of the mounting work of the hoist rope 5 can be improved.

Example 4

Next, a fourth embodiment of the present invention will be described with reference to fig. 8. Fig. 8 is an external perspective view showing an example of use of a tool for installing a suspension wire in an elevator according to a fourth embodiment of the present invention. The same structures as those of the first to third embodiments are denoted by the same reference numerals, and descriptions thereof are omitted.

The first to third embodiments describe examples of a so-called 2: 1 winding type elevator in which the load is reduced to half by multiplying the rotation speed of the hoisting machine 6 by 2, and the fourth embodiment describes an example of a so-called 1: 1 winding type elevator in which a hoisting machine is provided at the upper part of the hoistway and the elevator car 3 and the counterweight 4 are provided on both sides of the sheave of the hoisting machine via ropes.

In the case of an elevator of a 1: 1 winding type, an end portion of a suspension cable hangs down during an installation work of the suspension cable. That is, in the case of the 1: 1 winding type elevator, the operation of hanging down the suspension rope in a U-shape does not occur. In the present embodiment, a method of lowering the end of the suspension cable and the mounting tool will be described.

In this embodiment, the sling 5 is wound around the pulley 21 (step of winding the sling 5 around the pulley 21), and the end of the sling 5 is brought into contact with the sling 5 and fixed by a fixing means such as the wire belt 10 (step of bringing the end of the sling 5 into contact with the sling 5 and fixing by the fixing means).

In this state, the hoist rope 5 is lowered together with the mounting tool 20 (step of lowering the mounting tool 20 and the hoist rope 5). When the mounting jig 20 reaches the bottom of the elevator shaft 2, the harness 10 is detached, and the sling 5 is detached from the mounting jig 20 (a step of detaching the fixing mechanism and detaching the sling 5 from the mounting jig 20). Then, the rope 5 is fixed to the elevator car 3 or the counterweight 4 (step of fixing the rope 5 to the elevator car 3 or the counterweight 4).

According to the present embodiment, when the rope covered with the resin hangs down, the installation jig is hung on the rope, so that interference with the equipment in the lifting passage due to twisting of the rope can be suppressed, and the operation of winding the rope can be improved.

As described above, according to the embodiments of the present invention, even in a rope in which a winding mark of the rope covered with a resin is difficult to remove, the operation of attaching the rope can be performed in a lubricated manner.

The present invention is not limited to the above-described embodiments, and includes various modifications. The above-described embodiments are described in detail to facilitate understanding of the present invention, and are not necessarily limited to having all of the described configurations.

Claims

1. A tool clamp for installing a sling for an elevator is characterized in that,

the installation frock clamp of hoist cable for elevator possesses:

a plurality of hooks around which a sling is wound; and

a weight for applying tension to the sling,

one end of the hook is composed of an arm part connected with the heavy object through a connecting rod, the other end is composed of a clamping part which is opened and is used for winding the sling,

the link includes a rotating shaft in the same direction as the longitudinal direction of the suspension cable engaged with the engaging portion, and the plurality of hooks are rotated by the rotating shaft in a direction orthogonal to the longitudinal direction of the suspension cable,

the distance between adjacent hooks of the plurality of hooks is set to a range narrower than the diameter of the sling when the hooking part approaches.

2. The installation tool holder for a sling for an elevator according to claim 1,

a sliding member is provided at a portion of the engaging portion that contacts the suspension cable.