CN116924185A - Cable fixing device - Google Patents

Abstract

The invention provides a cable fixing device which can stably clamp and fix a cable without damaging the cable. The cable fixing device is provided with: a socket having a through hole that narrows from one side toward the other side; and a group of clamping members which are matched in a manner of clamping the cable penetrating through the through hole, wherein the group of clamping members have an appearance which is narrowed from one side to the other side in a state of clamping the cable, are inserted into the through hole from one side and are embedded into the through hole, and the group of clamping members are provided with grooves for clamping at the part for clamping the cable, and the part for clamping the cable is formed by a material with lower hardness than the outer surface part of the cable.

Description

Cable fixing device

Technical Field

The present invention relates to a rope fixing device used for clamping and fixing an elevator rope formed by twisting a plurality of strands.

Background

Conventionally, there is known a lift extension type elevator for sequentially extending the lifting and lowering stroke of a car while moving a machine room unit in a hoistway upward according to progress of building construction at a building construction site such as a high-rise building. In a lift extension type construction elevator, a rope wound around a rope drum provided in a machine room unit is pulled by a hoisting machine to raise and lower a car. The rope fed from the rope drum is held by a rope fixing device provided in the machine room unit and fixed to the machine room unit. When the machine room unit is moved to an upper floor, the cable is fed from the rope drum to be longer by releasing the clamping and fixing of the cable by the cable fixing device, and then the cable is clamped and fixed again by the cable fixing device.

As a structure of the rope fixing device in the lift extension type construction elevator, patent document 1 and patent document 2 disclose the following structures: the cable is clamped by a pair of plates, and the pair of plates is fastened by a plurality of bolts, thereby fixing the cable.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open No. 2020-179968

Patent document 2: japanese patent laid-open No. 8-133637

However, in the cable fixing devices disclosed in patent document 1 and patent document 2, the bolts are liable to loosen over the years, and the cables may not be firmly fixed. In addition, in order to firmly fix the cable, the fastening force is increased, but the cable may be crushed by excessive fastening and damaged to impair its function.

Disclosure of Invention

Accordingly, an object of the present invention is to provide a cable fixing device capable of stably clamping and fixing a cable without damaging the cable.

The rope fixing device of the present invention is used for clamping and fixing a rope of an elevator, the rope of the elevator is formed by twisting a plurality of strands, wherein the rope fixing device comprises: a socket having a through hole that narrows from one side toward the other side; and a group of clamping members which are matched in a manner of clamping the cable penetrating through the through hole, wherein the group of clamping members have an appearance which is narrowed from one side to the other side in a state of clamping the cable, are inserted into the through hole from one side and are embedded into the through hole, and the group of clamping members are provided with grooves at the part of clamping the cable, and the part of clamping the cable is formed by materials with lower hardness than the outer surface part of the cable.

Effects of the invention

According to the cable fixing device of the present invention, the cable can be stably clamped and fixed without damaging the cable.

Drawings

Fig. 1 is a perspective view showing a cable fixing device of an embodiment.

Fig. 2 is a perspective view showing the construction of the socket.

Fig. 3 is a perspective view showing a state in which a set of clip members is inserted into the through-hole of the socket.

Fig. 4 is a diagram for explaining a state change of the gripping member generated when the fixed cable is gripped.

Fig. 5 is a cross-sectional view of the contact surface of the cable and the clamp member, viewed from the side.

Fig. 6 is a view for explaining the size of the groove for clamping with respect to the size of the cable.

Fig. 7 is a diagram for explaining a state change of the gripping member generated when the fixed cable is gripped.

Fig. 8 is a view showing a change in the surface state of the groove generated when the fixing cable is clamped.

Fig. 9 is a view showing the cable fixing device in a state where the pressing member is mounted.

Fig. 10 is a diagram showing a lift extension process in a lift extension type construction elevator.

Fig. 11 is a view showing the cable fixing device in a state where the guide member is provided.

Fig. 12 is a view showing an example in which a low friction plate is arranged between a socket and a clamp member.

Fig. 13 is a diagram showing an example in which the receptacle is integrally formed.

Fig. 14 is a diagram showing an example in which the receptacle is constituted by 3 divided bodies.

Fig. 15 is a view showing an example in which only one of the holding members has an outer shape that narrows from one side toward the other side.

Fig. 16 is a diagram showing a configuration in which the movement of the clamp member is restricted using cotter pins.

Fig. 17 is a view showing an example in which a coil spring is provided below a socket.

Fig. 18 is a view showing another example of the cable.

Fig. 19 is a view (1) showing an example of clamping and fixing the compensation rope by the rope fixing device.

Fig. 20 is a view (2) showing an example of clamping and fixing the compensation rope by the rope fixing device.

Fig. 21 is a view showing an example of clamping and fixing the speed limiter rope by the rope fixing device.

Fig. 22 is a view showing the application of the cable fixing device to 1:1 example of a roping elevator.

Description of the reference numerals

1: a car;

2: a counterweight;

3: cage side hanging wheels;

4: counterweight side hanging wheels;

5. 600: a cable;

6: a traction machine;

7: a machine room unit;

8: a rope reel;

9: a diverting pulley;

10: a shackle;

11: a cable fixing device;

12: a connecting device;

13: a socket;

13c, 13d, 13f: a dividing body;

14: a set of clamping members;

15: a pressing member;

16: a bolt;

17: a 1 st guide member;

18: a 2 nd guide member;

19: a coil spring;

20: a disassembling rod;

23: a buffer;

40: a low friction plate;

130: a through hole;

13a: a base;

13b: a cover;

140: a groove;

144: an opening;

14a: a 1 st clamping member;

14b: a 2 nd clamping member;

14c: a 3 rd clamping member;

14d: a 4 th clamping member;

100. 200, 300, 400, 500: lift extension type elevator for construction;

371: a pin hole;

372: a cotter pin;

501: a main rope;

502: a compensating rope;

503: a speed limiter rope;

508: a compensating rope reel;

511: a 1 st cable fixing device;

512: a 2 nd cable fixing device;

513: a 3 rd cable fixing device;

518: a speed limiter rope reel;

520: a steel wire layer;

528: a main rope reel.

Detailed Description

The cable fixing device 11 according to the embodiment will be described below. The rope fixing device 11 is used when clamping and fixing the rope of an elevator, which is formed by twisting a plurality of strands. Fig. 1 is a perspective view showing a cable fixing device 11 of the embodiment.

As shown in fig. 1, the cable fixing device 11 includes: a socket 13 having a through hole 130, the through hole 130 being narrowed from one side (upper side in the drawing) to the other side (lower side in the drawing); a group of holding members 14 that are fitted to hold the cable 5 passing through the through-hole 130 and inserted into the through-hole 130; and a pressing member 15 mounted to the socket 13 when the one set of clamping members 14 is inserted into the through hole 130 to restrict movement of the one set of clamping members 14.

The socket 13 includes a base 13a and a cover 13b. The base 13a and the cover 13b are divided bodies divided by a dividing surface from one end (wide-mouth opening) to the other end (narrow-mouth opening) of the through hole 130, and the cover 13b can be attached to the base 13a using a screw S or the like. As shown in fig. 2, when the cover 13b is removed from the base 13a, the through-hole 130 is largely opened, and the cable 5 can be easily inserted into the through-hole 130 or removed from the through-hole 130. Further, the 1 st clamping member 14a and the 2 nd clamping member 14b can be easily placed in the through hole 130, or the 1 st clamping member 14a and the 2 nd clamping member 14b can be easily removed from the through hole 130 when the machine room unit 7 is lifted.

As shown in fig. 1, the corner 137 of the one end portion (wide-mouth opening portion) of the through-hole 130, which may be in contact with the one set of the clamping members 14, may be chamfered or curved. This prevents the one group of the clamp members 14 from being caught by one end of the through hole 130 and damaging the function of clamping and fixing the cable 5. Further, the corner 147 of the one group of the clip members 14 inserted into the one end of the through hole 130 may be chamfered or curved, so that the end of the one group of clip members 14 may be prevented from being caught on the surface of the socket 13 contacting the clip members, thereby impairing the function of fixing the cable 5.

The surface (inside of the through hole 130) of the socket 13, which is in contact with the 1 st clamping member 14a (or the 2 nd clamping member 14 b), is subjected to a friction-reducing surface treatment. As the friction-reducing surface treatment, plating treatment, polishing treatment, lubricant application treatment, and the like are used. For example, in the case where the 1 st holding member 14a (or the 2 nd holding member 14 b) is made of an aluminum alloy, the surface of the socket 13 in contact with the 1 st holding member 14a (or the 2 nd holding member 14 b) may be subjected to an electro-galvanizing process. Thereby, the friction coefficient becomes small at the contact surface of the socket 13 with the 1 st holding member 14a (or the 2 nd holding member 14 b). Although the case where the surface of the socket 13 is subjected to the friction reducing surface treatment is described here, the surface of the 1 st clamp member 14a (or the 2 nd clamp member 14 b) contacting the socket 13 may be subjected to the friction reducing surface treatment instead of or in addition to the friction reducing surface treatment.

Fig. 3 is a perspective view showing a state in which a set of the clip members 14 is inserted into the through-hole 130. The group of holding members 14 is constituted by a 1 st holding member 14a and a 2 nd holding member 14b having an outer shape that narrows from one side toward the other side in a state of holding the cable 5, the 1 st holding member 14a and the 2 nd holding member 14b being engaged in such a manner as to hold the cable 5. When the fixed cable 5 is clamped, the 1 st clamping member 14a and the 2 nd clamping member 14b are engaged to clamp the cable 5, and inserted from one side (the wide-mouth opening side) and fitted into the through hole 130. When tension is generated in the cable 5, the force applied to the other side (the opening side of the narrow opening) by the one set of clip members 14 due to the tension applied to the cable 5 is balanced with the component of the resistance force applied to the one set of clip members 14 from the inner wall of the socket 13, which is opposite to the direction of the force applied to the other side. Further, in the group of the holding members 14, a force holding the cable 5 is generated due to a component of the resistance force received from the inner wall of the socket 13 in a direction orthogonal to the direction of the force received to the other side.

When the clamping fixation of the cable 5 is released, the 1 st clamping member 14a and the 2 nd clamping member 14b are removed from the through hole 130. As shown in fig. 3, the 1 st and 2 nd clip members 14a and 14b have portions 141 that are exposed to one side of the through-hole 130 when the 1 st and 2 nd clip members 14a and 14b are fitted into the through-hole 130. An opening 144 is formed in the exposed portion 141, and when the 1 st clamping member 14a and the 2 nd clamping member 14b are taken out of the through hole 130, a tool such as a metal rod is engaged with the opening 144 to be used.

The 1 st clamping member 14a and the 2 nd clamping member 14b have a groove 140 for clamping at a portion for clamping the cable 5, and the portion for clamping the cable 5 is formed of a material having a lower hardness than the outer surface portion of the cable 5. For example, in the case where the outer surface portion of the cable 5 is formed of a hard steel wire having a vickers hardness in the range of 440 to 470Hv, the 1 st clamp member 14a and the 2 nd clamp member 14b are formed of an aluminum alloy having a vickers hardness in the range of 45 to 100Hv, for example. As a result, as shown in fig. 4, the 1 st gripping member 14a and the 2 nd gripping member 14b can grip the cable 5 while sinking into the surface of the gripped portion, so that the substantial contact area between the strands of the cable 5 and the gripping members can be increased, and the cable 5 can be gripped and fixed without damaging the cable. Fig. 4 (b) is a cross-sectional view A-A of fig. 4 (a) with the cable 5 omitted.

Further, since the cable 5 is caught in the groove 140, an indentation of the cable 5 is formed on the surface of the holding member 14. Fig. 5 is a cross-sectional view of the contact surface between the cable 5 and the 1 st clamp member 14a (or the 2 nd clamp member 14 b) viewed from the side. As shown in fig. 5, the 1 st gripping member 14a (or the 2 nd gripping member 14 b) is formed of a material having a lower hardness than the cable 5, so that the cable 5 is caught in the surface of the gripping member 14. In general, as shown in the following formula (1), the coefficient of friction is considered to be the sum of the mechanism of adhesion friction and the mechanism of plow-out. The sticking friction is the adhesive force generated at the contact surface, and the resistance associated with the plowing of the material of the soft member by the member of the hard material. μa in the following formula (1) is an adhesion term, and μp is a plow term.

[ 1]

Mu = μa + μp (formula 1)

Since the cable 5 is caught in the holding member, the component of the plow μp increases, and the friction coefficient increases at the contact surface between the cable 5 and the 1 st holding member 14a (or the 2 nd holding member 14 b). Thereby, the friction coefficient between the groove 140 of the holding member 14 and the cable 5 increases, and the force for holding the cable 5 does not need to be applied in advance.

As shown in fig. 6, the groove 140 is formed in an arc shape in cross section, and the radius of curvature R thereof may be set smaller than the radius R of the cable 5. This can further increase the friction coefficient between the groove 140 of the clamp member 14 and the cable 5. In this case, if the groove is too small, the cable 5 cannot fit into the groove, and therefore, the radius of curvature R of the groove 140 is preferably set to 90% or more of the radius R of the cable 5 and less than 100% of the radius R of the cable 5. The cable 5 includes a fiber core 510 and a wire layer 520, and the wire layer 520 is formed by winding a plurality of steel strands 505 around the outer periphery of the fiber core 510. Each steel strand 505 is formed by twisting a plurality of steel wires. In this cable 5, the wire layer 520 corresponds to the outer surface of the cable of the present invention. As the radius R of the cable 5, a radius of a circle circumscribing a cross section of the cable 5 perpendicular to the longitudinal direction is used.

Thus, when the 1 st clamp member 14a and the 2 nd clamp member 14b are engaged to clamp the cable 5, first, as shown in fig. 7 (a), the cable 5 is fitted into the groove 140, and the groove portion of the groove 140 is deformed in an expanding manner, and at the same time, as shown by an arrow C, a reaction force is generated. Then, when the cable 5 is tensioned, a force is generated in which the cable 5 presses the 1 st clamping member 14a and the 2 nd clamping member 14b, and as shown in fig. 5 (b), the cable 5 is forced substantially entirely.

Fig. 8 (a) is a cross-sectional view A-A of fig. 7 (a) with the cable 5 omitted. As shown in fig. 8 (a), in the state of fig. 7 (a), an indentation of the cable 5 is formed in a part of the surface of the groove 140. Fig. 8 (b) is a cross-sectional view A-A of fig. 7 (b) with the cable 5 omitted. As shown in fig. 8 (b), in the state of fig. 7 (b), the indentation of the cable 5 is formed on the entire surface of the groove 140, and the friction coefficient of the contact surfaces between the 1 st clamp member 14a and the 2 nd clamp member 14b and the cable 5 can be further increased.

As shown in fig. 9, when the one set of holding members 14 is inserted into the through hole 130, the pressing member 15 is attached to one side of the socket 13 by the bolts 16 or the like so as to restrict the movement of the one set of holding members 14 in a direction away from the through hole 130. The pressing member 15 has a bent portion 151, and the bent portion 151 is formed by bending a metal plate and is bent to have a shape to wrap one end portion of the one group of the holding members 14. Further, the loosening of the bolt 16 may be suppressed by interposing a spring between the pressing member 15 and the head of the bolt 16.

Hereinafter, a lift extension process in a lift extension type construction elevator 100 to which the rope fixing device 11 is applied will be described with reference to fig. 10. As shown in fig. 10, the lift extension type construction elevator 100 includes a machine room unit 7, and the machine room unit 7 is movable in the vertical direction in the hoistway. The machine room unit 7 is provided with a hoisting machine 6, rope drums 8, rope fixing devices 11, a control panel, and the like, the hoisting machine 6 lifts and lowers the car 1 and the counterweight 2 by means of ropes 5 (main ropes), the rope drums 8 are wound with ropes 5 that need to be added when the lifting stroke is extended, and the ropes 5 fed from the rope drums 8 are turned by diverting pulleys 9 to pass through the rope fixing devices 11. The cable 5 passing through the cable fixing device 11 is further wound around the car side hanging pulley 3, the traction machine 6 and the counterweight side hanging pulley 4 in sequence, and the tail end of the cable is fixed to the machine room unit 7 through the shackle 10, wherein the car side hanging pulley 3 is mounted on the car 1, and the counterweight side hanging pulley 4 is mounted on the counterweight 2.

When the machine room unit 7 is fixed in the hoistway and the lift extension type construction elevator 100 can be used, as shown in fig. 10 (a), the hoisting machine 6 is driven in a state where the rope 5 is fixed by the rope fixing device 11. When the use of the lift extension type construction elevator 100 by the user is interrupted and the machine room unit 7 is moved upward, first, as shown in fig. 10 (b), the counterweight 2 is lowered to the lowest part of the hoistway, and the car 1 is connected to the machine room unit 7 by the connecting device 12 in a state supported by the buffer 23 or the hoistway bottom, for example. Then, as shown in fig. 10 (c), the fixing of the cable 5 by the cable fixing device 11 is released by removing the group of clamping members 14 from the socket 13, and the machine room unit 7 is moved upward in the hoistway by a hoisting device such as a tower crane or a winch. At this time, the rope 5 is fed from the rope reel 8, and the lifting stroke is extended. Then, the rope 5 is again fixed by the rope fixing device 11, and the connection of the connecting device 12 is released, so that the lift extension type construction elevator 100 can be reused.

In addition, when the fixing of the cable 5 by the cable fixing device 11 is released and the machine room unit 7 is moved upward in the hoistway, as shown in fig. 11, the 1 st guide member 17 and the 2 nd guide member 18 made of resin or the like may be provided on one side (the wide-mouth opening side) and the other side (the narrow-mouth opening side) of the through hole 130 in order to prevent damage to the cable 5 due to contact between the cable 5 and the receptacle 13. Fig. 11 (a) is a front view, fig. 11 (b) is a side view, and fig. 11 (17 a) is a bolt for fixing the 1 st guide member 17 to the socket 13.

As described above, the cable fixing device 11 according to the embodiment includes: a socket 13 having a through hole 130, the through hole 130 narrowing from one side to the other side; and a set of gripping members 14 which cooperate in such a way as to grip the cable 5. The pair of holding members 14 has an outer shape that narrows from one side to the other side in a state where the cable 5 is held, and is inserted from one side into the through hole 130. Furthermore, the set of gripping members 14 has grooves in the portion of the gripping cable 5 formed of a material having a lower hardness than the outer portion of the cable 5. This makes it possible to stably clamp and fix the cable 5 without damaging the cable 5.

Further, since the cable 5 is caught in the holding member 14, the friction coefficient of the contact surface between the holding member 14 and the cable 5 can be increased, and therefore, the cable 5 can be held and fixed without the pre-pressing force of the holding member 14.

In the above embodiment, the description has been made of the case where the surface of the socket 13 in contact with the 1 st clamp member 14a (or the 2 nd clamp member 14 b) or the surface of the 1 st clamp member 14a (or the 2 nd clamp member 14 b) in contact with the socket 13 is subjected to the friction reduction surface treatment, but the invention is not limited thereto. Instead of or in addition to the friction reducing surface treatment, a low friction plate may be disposed between the socket 13 and the 1 st clamping member 14a (or the 2 nd clamping member 14 b). Fig. 12 is a diagram showing an example in which the low friction plate 40 is disposed between the socket 13 and the 1 st clamp member 14a (or the 2 nd clamp member 14 b). Fig. 12 (b) is a side view, and fig. 12 (a) is a D-D cross-sectional view of fig. 12 (b).

In the above embodiment, the case where the receptacle 13 is formed of 2 divided bodies of the base 13a and the cover 13b has been described, but the present invention is not limited thereto. The receptacle 13 may be integrally formed, or may be formed of 3 or more divided bodies. Fig. 13 is a view (front view, side view, top view) showing an example in which the receptacle 13 is integrally formed, and fig. 14 is a view (front view, side view, top view) showing an example in which the receptacle 13 is constituted by 3 divided bodies 13c, 13d, 13 f. Further, 13m in fig. 14 is a bolt for fixing the divided bodies 13d and 13f to the divided body 13 c.

In the above embodiment, the description has been made of the case where both the 1 st clamp member and the 2 nd clamp member have the outer shape that narrows from one side to the other side, but the present invention is not limited thereto. A group of gripping members that cooperate in a manner to grip the cable is only required to have at least 1 of them having a profile that narrows from one side to the other side, thereby making the group of gripping members as a whole have a profile that narrows from one side to the other side in a state of gripping the cable. Fig. 15 is a diagram (front view, side view, top view) showing an example in which only one 4 th clamping member 14d of the 3 rd clamping members 14c and 4 th clamping members 14d constituting a group of clamping members has an outer shape that narrows from one side toward the other side.

In the above embodiment, the case where the movement of the one group of the holding members 14 in the direction away from the through-hole 130 is regulated by the pressing member 15 has been described, but the movement of the one group of the holding members 14 in the direction away from the through-hole 130 may be regulated instead of or in addition to this by the structure using the cotter pin 372 as shown in fig. 16. Fig. 16 shows a structure in which pin holes 371 are provided near the lower ends of the one set of clamping members 14, and cotter pins 372 are inserted into the pin holes 371 of the one set of clamping members 14 inserted into the through holes 130. According to this structure, when the one set of clip members 14 is to be moved in a direction away from the through hole 130, the cotter pin 372 inserted into the pin hole 371 comes into contact with the lower surface of the cover 13b, and movement of the one set of clip members in a direction away from the through hole 130 is restricted. Fig. 16 (a) is a front view, and fig. 16 (b) is a side view.

In the above embodiment, when the cable fixing device 11 is provided in the machine room unit 7, as shown in fig. 17, a coil spring 19 can be provided below the receptacle 13. When the one set of holding members 14 is taken out from the through hole 130, the detaching rod 20 can be inserted into the opening 144, and the one set of holding members 14 can be detached by a leverage force using the contact between the detaching rod 20 and the socket 13 as a fulcrum with the contact between the one set of holding members 14 and the detaching rod 20 as an action point. At this time, by providing the coil spring 19 below the socket 13, the socket 13 can be moved downward, and thereby the one group of the clip members 14 can be taken out with a smaller force. This is because, when the one set of the clamp members 14 is taken out from the through-hole 130, the cable 5 clamped by the one set of clamp members 14 is sometimes in a state where tension due to its own weight is applied, but the socket 13 can be moved downward by the coil spring 19, so that the socket 13 can be separated from the one set of clamp members 14 without lifting the cable 5. Fig. 17 (a) is a front view, and fig. 17 (b) is a side view.

In the above embodiment, the case where the cable 5 is formed by winding the plurality of steel strands 505 around the outer periphery of the fiber core 510 has been described, but the cable 5 is not limited to the structure exemplified in the above embodiment as long as the cable 5 is formed by twisting the plurality of strands. For example, the cable 600 shown in fig. 18 may also be used. The cable 600 may further include a steel core 610 made of steel strands, a 1 st wire layer 620, and a 2 nd wire layer 630, wherein the 1 st wire layer 620 is formed by winding a plurality of steel strands 615 around the outer periphery of the steel core 610, and the 2 nd wire layer 630 is formed by winding a plurality of steel strands 625 around the outer periphery of the 1 st wire layer 620. In this cable 600, the 2 nd wire layer 630 corresponds to the outer surface of the cable of the present invention.

In the above embodiment, the case where the cable 5 held and fixed by the cable fixing device 11 is the main rope is exemplified, but not limited thereto. The cable 5 held by the cable holding device 11 may be either a compensation cable or a speed limiter cable.

In the above embodiment, the cable fixing device 11 is disposed in the machine room unit provided in the hoistway, but the present invention is not limited to this. The cable fixing device 11 may be disposed in the pit or in an accessory chamber provided adjacent to the pit. The rope fixing device 11 may be fixed to the car 1 or to the counterweight 2.

Fig. 19 is a diagram showing an example of a lift extension type construction elevator including a 2 nd rope fixing device 512 for clamping and fixing the compensating rope 502 in addition to a 1 st rope fixing device 511 for clamping and fixing the main rope 501. In the lift extension type construction elevator 200 shown in fig. 19, both the compensating rope drum 508 around which the compensating rope 502 is wound and the 2 nd rope fixing device 512 which clamps and fixes the compensating rope 502 fed from the compensating rope drum 508 are fixed to the counterweight 2. When the machine room unit 7 is installed in the hoistway and the lift extension type construction elevator 200 can be used, the main rope 501 is clamped and fixed by the 1 st rope fixing device 511, and the compensating rope 502 is clamped and fixed by the 2 nd rope fixing device 512. On the other hand, when the machine room unit 7 is moved upward in the hoistway, the main rope 501 and the compensating rope 502 can be lengthened by releasing the clamping and fixing of the main rope 501 by the 1 st rope fixing device 511 and releasing the clamping and fixing of the compensating rope 502 by the 2 nd rope fixing device 512. In fig. 19, the case where the compensating rope drum 508 and the 2 nd rope fixing device 512 are fixed to the counterweight 2 is shown, but the compensating rope drum 508 and the 2 nd rope fixing device 512 may be fixed to the car 1.

Fig. 20 is a diagram showing another example of a lift extension type construction elevator including a 2 nd rope fixing device 512 for clamping and fixing the compensating rope 502 in addition to a 1 st rope fixing device 511 for clamping and fixing the main rope 501. In the lift extension type construction elevator 300 shown in fig. 20, both the compensating rope drum 508 around which the compensating rope 502 is wound and the 2 nd rope fixing device 512 which clamps and fixes the compensating rope 502 fed from the compensating rope drum 508 are disposed in the pit. When the machine room unit 7 is installed in the hoistway and the lift extension type construction elevator 300 can be used, the main rope 501 is clamped and fixed by the 1 st rope fixing device 511, and the compensating rope 502 is clamped and fixed by the 2 nd rope fixing device 512. On the other hand, when the machine room unit 7 is moved upward in the hoistway, the main rope 501 and the compensating rope 502 can be lengthened by releasing the clamping and fixing of the main rope 501 by the 1 st rope fixing device 511 and releasing the clamping and fixing of the compensating rope 502 by the 2 nd rope fixing device 512.

Fig. 21 is a diagram showing an example of a lift extension type construction elevator including a 3 rd rope fixing device 513 for clamping and fixing the governor rope 503 in addition to a 1 st rope fixing device 511 for clamping and fixing the main rope 501. In the lift extension type construction elevator 400 shown in fig. 21, both the governor rope drum 518 around which the governor rope 503 is wound and the 3 rd rope fixing device 513 for sandwiching and fixing the governor rope 503 fed from the governor rope drum 518 are fixed to the car 1. Specifically, the governor rope drum 518 is provided above the car 1, and the 3 rd rope fixing device 513 is connected and fixed to the car by a connecting rod 513 a. When the machine room unit 7 is installed in the hoistway and the lift extension type construction elevator 400 is used, the main rope 501 is clamped and fixed by the 1 st rope fixing device 511, and the governor rope 503 is clamped and fixed by the 3 rd rope fixing device 513. On the other hand, when the machine room unit 7 is moved upward in the hoistway, the main rope 501 and the speed limiter rope 503 can be lengthened by releasing the clamping and fixing of the main rope 501 by the 1 st rope fixing device 511 and releasing the clamping and fixing of the speed limiter rope 503 by the 3 rd rope fixing device 513.

Furthermore, in the above embodiment, the cable fixing device 11 is shown applied to 2: the case of the 1-roping type lift extension type construction elevator 100 is not limited thereto. Fig. 22 is a view showing the application of the 1 st cable fixing device 511 for clamping and fixing the main rope 501 to 1: 1-roping type elevator for use in extended lift construction. In the lift extension type construction elevator 500 shown in fig. 22, both the main rope drum 528 around which the main rope 501 is wound and the 1 st rope fixing device 511 for sandwiching and fixing the main rope 501 fed from the main rope drum 528 are fixed to the car 1. When the machine room unit 7 is installed in the hoistway and the lift extension type construction elevator 500 can be used, the main rope 501 is clamped and fixed by the 1 st rope fixing device 511, and when the machine room unit 7 is moved upward in the hoistway, the clamping and fixing of the main rope 501 by the 1 st rope fixing device 511 is released, whereby the main rope 501 can be extended.

Claims (10)

1. A rope fixing device for use in gripping and fixing a rope of an elevator formed by twisting a plurality of strands, wherein the rope fixing device comprises:

a socket having a through hole that narrows from one side toward the other side; and

a group of clamping members which are matched in a mode of clamping the cable penetrating through the through hole,

the group of clamping members has an outer shape which narrows from the one side toward the other side in a state of clamping the cable, is inserted from the one side and is fitted into the through hole,

the set of gripping members has grooves in the portion gripping the cable, which is formed of a material having a lower hardness than the outer portion of the cable.

2. The cable fixture device of claim 1 wherein,

the groove is formed in a circular arc shape in section, and the curvature radius of the groove is smaller than that of the cable.

3. The cable fixture device of claim 1 or 2 wherein,

the surface of the socket contacting the clamping member or the surface of the clamping member contacting the socket is subjected to a friction-reducing surface treatment.

4. The cable fixture device of any one of claims 1-3 wherein,

a low friction plate is disposed between the socket and the clamping member.

5. The cable fixture device of any one of claims 1-4 wherein,

the socket is composed of 2 or more divided bodies, and the 2 or more divided bodies are divided by a dividing surface from the one end portion to the other end portion of the through hole.

6. The cable fixture device of any one of claims 1-5 wherein,

an opening is formed in a portion of the holding member that is exposed to the one side of the through hole when the holding member is fitted into the through hole, and the opening is used when the holding member is taken out of the through hole.

7. The cable fixture device of any one of claims 1-6 wherein,

the cable fixing device further includes a pressing member attached to the one side of the socket and configured to restrict movement of the one group of clamping members inserted into the through hole in a direction away from the through hole.

8. The cable fixture device of any one of claims 1-7 wherein,

the cable is a main, compensating or speed limiter rope.

9. The cable fixture device of any one of claims 1-8 wherein,

the rope fixing device is arranged in a machine room unit arranged in a hoistway, a pit, or an auxiliary room arranged adjacent to the pit, or is fixed to a car or a counterweight.

10. The cable fixture device of any one of claims 1 to 9 wherein,

the group of clamping members is composed of a 1 st clamping member and a 2 nd clamping member, the 1 st clamping member and the 2 nd clamping member are matched in a mode of clamping the cable,

either one or both of the 1 st clamping member and the 2 nd clamping member have an outer shape that narrows from the one side toward the other side.