CN211036473U

CN211036473U - Clothes hanger

Info

Publication number: CN211036473U
Application number: CN201921994281.1U
Authority: CN
Inventors: 沈文博; 毛克勇
Original assignee: Ningbo Schloeman Intelligent Technology Co ltd
Current assignee: Ningbo Schloeman Intelligent Technology Co ltd
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2020-07-17
Anticipated expiration: 2029-11-18

Abstract

The utility model relates to a clothes hanger technical field dries in air, specifically be a clothes hanger dries in air, which comprises a mounting bracket, clothes hanger body and drive arrangement dries in the air, drive arrangement includes the casing, the reel, including a motor, an end cap, a controller, and a cover plate, connect rope and two guide blocks, coaxial being equipped with spiral helicine and being used for holding the spacing groove of single connection rope on the outer anchor ring of reel, the guide block is along being on a parallel with the axis direction swing joint of reel on the casing, every guide block all matches in a spacing inslot through the spacing slider slip that sets up on it, all be equipped with the line hole of crossing that the tangential direction of the reel arranged along rather than bordering on every guide block, and the last connection rope of reel all passes rather. When the winding wheel rotates, the guide block can be driven to move along the axial direction of the winding wheel, the connecting rope can be pulled to run along the limiting groove all the time, and therefore the connecting rope can be uniformly arranged along the axial direction of the winding wheel all the time, and the connecting rope is prevented from being wound in the same area on the winding wheel.

Description

Clothes hanger

Technical Field

The utility model relates to a clothes hanger technical field specifically is a clothes hanger dries in air.

Background

Along with the continuous improvement of living standard, the automatic clothes hanger is more and more popular, not only saves space, but also facilitates the airing operation of residents. The automatic clothes hanger mainly comprises a telescopic clothes airing rod, a mounting frame and a driving device which is arranged on the mounting frame and used for controlling the lifting of the clothes airing rod, so that the actual lifting height of the clothes airing rod can be controlled through the driving device according to the actual requirements of customers. The driving device generally comprises a motor, a winding wheel and a stop assembly, one end of a connecting rope on the winding wheel is fixed with the winding wheel, the other end of the connecting rope is connected with the clothes hanger, and the lifting action of the clothes hanger can be realized by controlling the motor to drive the winding wheel to rotate; in addition, when the clothes hanger is lifted to the top dead center and the bottom dead center, the stopping assembly is involved to stop the motor, so that the motor is prevented from being burnt out.

Although the existing driving device can realize the lifting control of the clothes hanger, the following defects still exist: 1. in the process that the motor drives the wire winding wheel to rotate, the connecting rope is always wound in the same area on the wire winding wheel, the radial size of the wire winding wheel is greatly increased after the wire winding wheel is fully wound, and the phenomenon of blocking is easily caused in the lifting process by the wire winding mode; 2. the connecting rope and the winding wheel are generally fixedly connected, and are difficult to disassemble and assemble during replacement and maintenance; 3. the top dead center and the bottom dead center of the lifting of the clothes hanger are difficult to adjust. To this end, we propose a laundry rack.

SUMMERY OF THE UTILITY MODEL

The main object of the present invention is to provide a clothes hanger to solve the above-mentioned problems in the prior art.

In order to achieve the above object, the utility model provides a following technical scheme: a clothes hanger comprises a mounting rack, a clothes hanger body which is movably connected below the mounting rack in a lifting manner, and a driving device which is arranged in the mounting rack and used for driving the clothes hanger body to lift, wherein the driving device comprises a shell which is arranged on the mounting rack, two winding wheels which are rotatably arranged in the shell and are arranged in a bilateral symmetry manner, a motor which is arranged on the shell and used for driving the winding wheels, and two guide blocks, and a connecting rope connected with the clothes hanger body is wound on each winding wheel; a spiral limiting groove for accommodating a single connecting rope is coaxially arranged on the outer ring surface of the winding wheel; the guide blocks are movably connected to the shell along the axis direction parallel to the winding wheel, limiting sliding blocks are arranged on the guide blocks, the two limiting sliding blocks are matched in the limiting grooves in a sliding mode respectively, each guide block is provided with a wire passing hole arranged along the tangential direction of the winding wheel adjacent to the guide block, and the connecting rope on the winding wheel penetrates through the wire passing holes adjacent to the guide block.

The beneficial effects of the utility model reside in that: the utility model has simple structure and reasonable layout; the guide block can be movably connected to the shell along the direction parallel to the axis of the winding wheel, and the limiting slide block on the guide block is matched with the limiting groove in a sliding manner, so that when the winding wheel rotates, the guide block can move along the axial direction of the winding wheel under the action of the limiting slide block and the limiting groove; and the wire passing holes are arranged along the tangential direction of the winding wheel, and the connecting ropes pass through the wire passing holes, so that the connecting ropes can be dragged to be always led along the limiting grooves while the guide blocks move, and therefore the connecting ropes can be uniformly arranged, and the connecting ropes are prevented from being always wound on the same area of the winding wheel during winding.

Preferably, the guide blocks are movably connected to the shell along a direction parallel to the axis of the winding wheel, that is, the shell is provided with a limiting rod arranged along a direction parallel to the axis of the winding wheel, and the guide blocks are provided with limiting holes matched with the limiting rod in a sliding manner. The advantages are that: under the cooperation of the limiting rod and the limiting hole, the sliding directionality of the guide block is ensured.

Preferably, the driving device further comprises a wire pressing assembly, the wire pressing assembly comprises two wire pressing wheels, the wire pressing wheels are rotatably mounted on the shell, the axes of the wire pressing wheels are parallel to the axis of the wire winding wheel, the axial width of each wire pressing wheel is equivalent to the axial width of the wire winding wheel, and a wire passing channel through which only one connecting rope can pass is formed between the outer annular surface of each wire pressing wheel and the limiting groove on the outer annular surface of the wire winding wheel. The advantages are that: under the action of a wire passing channel which is formed between the outer ring surface of the wire pressing wheel and the limiting groove on the outer ring surface of the wire winding wheel and can only allow a single connecting rope to pass through, the connecting rope can be ensured to be always wired along the limiting groove.

Preferably, the driving device further comprises a stopping assembly, the stopping assembly comprises two pinions, two transmission gear sets, two bull gears, two operating rods and two touch switches arranged on the shell, the two pinions are respectively coaxially connected to the two winding wheels, the transmission gear sets and the bull gears can be rotatably arranged on the shell, and each pinion is connected with the bull gear through one transmission gear set; one end of each of the two operating rods is rotatably connected to the axes of the two bull gears, and a locking mechanism for limiting the rotation of the operating rods relative to the bull gears is arranged between each operating rod and each bull gear; the two touch switches are respectively positioned on a circumferential track formed by the other ends of the two operating rods rotating around the axis of the bull gear, and when the operating rods rotate to be in contact with the touch switches, the touch switches control the motor to stop operating. The advantages are that: when the clothes hanger body is upgraded to the top dead center and the bottom dead center, the motor can be controlled to stop running through the two touch switches respectively, so that the clothes hanger is ensured to stop moving immediately after moving to the top dead center and the bottom dead center; in addition, the top dead center and the bottom dead center of the movement of the clothes hanger can be adjusted by rotating the position of the operating rod relative to the touch switch.

Preferably, the locking mechanism comprises a pawl made of elastic materials, a groove with a cylindrical structure is coaxially arranged at one end of the large gear, which is connected with the operating rod, a ratchet is arranged on the inner ring surface of the groove, the pawl is installed on the operating rod, and the pawl can rotate in a single direction to be matched with the ratchet. The advantages are that: the upper dead point and the lower dead point of the movement of the clothes hanger can be adjusted by rotating the position of the pawl relative to the ratchet.

Preferably, the pawl is of a curved structure, and the curved outer side of the pawl is adapted to the rotation direction of the pawl. The advantages are that: the bent structure on the pawl can play a role in buffering, and the pawl is prevented from being broken when rotating.

Preferably, the number of the pawls is three. The advantages are that: too much quantity is not favorable for saving materials, and too little quantity is difficult to ensure the stability.

Preferably, the part of the operating rod, which is in contact with the touch switch, is in an arc-shaped structure. The advantages are that: the contact stability of the operating rod and the touch switch is improved.

Preferably, the connecting rope is detachably connected with the winding wheel. The advantages are that: is convenient for replacement and maintenance.

Preferably, connect between rope and the reel for can dismantle and be connected the tip that indicates to connect the rope and be equipped with the stopper, the one end radial protrusion of reel has a spacing portion, the axis direction along the reel runs through being equipped with the through-hole that can supply the stopper to pass in the spacing portion, be equipped with the accommodation hole that is used for holding the stopper and be used for communicateing accommodation hole and through-hole and only can supply the intercommunicating pore that single connection rope passes through on the terminal surface that the reel was kept away from to the axis direction along the reel in the spacing portion. The advantages are that: through will the one end that has spacing portion on the connection rope passes earlier behind the through-hole, puts into again in the accommodation hole, and ensure connect in the rope card goes into the intercommunication hole, can realize the connection of connection rope and take-up pulley.

Drawings

FIG. 1 is a perspective view of a laundry stand according to a preferred embodiment of the present invention;

fig. 2 is a perspective structural view (top view) of a driving apparatus according to a preferred embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at I;

FIG. 4 is a schematic view of the housing of FIG. 2 in a separated state;

fig. 5 is a perspective view (bottom view) of a driving apparatus according to a preferred embodiment of the present invention;

FIG. 6 is a top view of FIG. 5;

FIG. 7 is a schematic adjustment of the pawl;

fig. 8 to 10 are adjustment diagrams of the stopper assembly according to a preferred embodiment of the present invention.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present embodiments more clearly, and the protection scope of the present invention is not limited thereby.

Referring to fig. 1 to 10, in an embodiment of the present invention, a laundry rack includes an installation frame 100, a laundry rack body 200 movably connected below the installation frame 100 in a lifting manner, and a driving device 300 disposed in the installation frame 100 and used for driving the laundry rack body 200 to lift, wherein the installation frame 100 and the laundry rack body 200 are both in the prior art. The driving device 300 comprises a housing 1 mounted on the mounting frame 100 (the housing 1 is composed of a cover body 12 and a bottom plate 13), two winding wheels 2 which are rotatably mounted in the housing 1 and are arranged in bilateral symmetry, a motor 3 mounted on the housing 1 and used for driving the winding wheels 2, and two guide blocks 5; each winding wheel 2 is wound with a connecting rope 4 connected with the clothes hanger body 200; the lower ends of the two winding wheels 2 are integrally and coaxially provided with the driving gear 20, the output shaft of the motor 3 simultaneously drives the two driving gears 20 to rotate through the worm, and the motor 3 drives the winding wheels 2 to pay off or wind the clothes, so that the clothes hanger body 200 can be lifted and lowered. A spiral limiting groove 21 for accommodating a single connecting rope 4 is coaxially arranged on the outer annular surface of the winding wheel 2; the guide blocks 5 can be movably connected to the shell 1 along the axial direction parallel to the winding wheel 2, the guide blocks 5 are respectively provided with a limiting slide block, the two limiting slide blocks are respectively matched in the limiting grooves 21 in a sliding mode, each guide block 5 is provided with a wire passing hole 51 arranged along the tangential direction of the winding wheel 2 adjacent to the guide block, and the connecting rope 4 on the winding wheel 2 penetrates through the wire passing hole 51 adjacent to the guide block.

In an embodiment, the guide blocks 5 are movably connected to the housing 1 along a direction parallel to the axis of the winding wheel 2, that is, the housing 1 is provided with a limit rod 11 arranged along a direction parallel to the axis of the winding wheel 2, and the guide blocks 5 are provided with limit holes matched with the limit rod 11 in a sliding manner. Under the limit matching of the limit rod 11 and the limit hole, the guide block 5 can only move along the direction parallel to the axis of the winding wheel 2; when the motor 3 drives the winding wheel 2 to rotate, the winding wheel 2 rotates and drives the guide block 5 to move along the axial direction of the winding wheel 2 due to the limiting sliding fit between the limiting slide block and the limiting groove 21.

In an embodiment, the driving device 300 further includes a wire pressing assembly, the wire pressing assembly includes two wire pressing wheels 6, the wire pressing wheels 6 are rotatably mounted on the housing 1, an axis of each wire pressing wheel 6 is parallel to an axis of the winding wheel 2, an axial width of each wire pressing wheel 6 is equivalent to an axial width of the winding wheel 2, and a wire passing channel through which only one connection rope 4 can pass is formed between an outer annular surface of each wire pressing wheel 6 and the limiting groove 21 on the outer annular surface of the winding wheel 2. The advantages are that: under the action of a wire passing channel which is formed between the outer ring surface of the wire pressing wheel 6 and the limiting groove 21 on the outer ring surface of the wire winding wheel 2 and can only allow a single connecting rope 4 to pass through, the connecting rope 4 is ensured to be always routed along the limiting groove 21.

In an embodiment, the driving device 300 further includes a stopping assembly 7, the stopping assembly 7 includes two small gears 71, two transmission gear sets 72, two large gears 73, two operating levers 74 and two touch switches 75 mounted on the housing 1, the two small gears 71 are respectively coaxially connected to the two winding wheels 2, the transmission gear sets 72 and the large gears 73 are both rotatably mounted on the housing 1, and each small gear 71 is connected to the large gear 73 through one transmission gear set 72; one end of each of the two operating levers 74 is rotatably connected to the axes of the two bull gears 73, and a locking mechanism for limiting the rotation of the operating lever 74 relative to the bull gears 73 is arranged between each of the operating levers 74 and the bull gears 73; the two tact switches 75 are respectively located on a circular track formed by the other ends of the two operating rods 74 rotating around the axis of the large gear 73, and when the operating rods 74 rotate to contact the tact switches 75, the tact switches 75 control the motor 3 to stop operating. The advantages are that: when the clothes hanger body 200 is upgraded to the top dead center and the bottom dead center, the motor 3 can be controlled to stop operating through the two touch switches 75, so that the clothes hanger is ensured to stop moving immediately after moving to the top dead center and the bottom dead center; in addition, the top dead point and the bottom dead point of the laundry rack movement can be adjusted by rotating the position of the operating lever 74 with respect to the tact switch 75.

In an embodiment, the locking mechanism includes a pawl 8 made of an elastic material, a cylindrical recess 731 is coaxially disposed at one end of the large gear 73 connected to the operating rod 74, a ratchet 732 is disposed on an inner annular surface of the recess 731, the pawl 8 is mounted on the operating rod 74, and the pawl 8 can be rotationally matched with the ratchet 732 in a single direction. By rotating the pawl 8 clockwise, as shown in fig. 7, the relative position of the operating lever 74 can be changed.

In the embodiment, the pawl 8 has a curved structure, and the curved outer side of the pawl is adapted to the rotation direction of the pawl. The advantages are that: the bent structure on the pawl 8 can play a role in buffering, and the pawl 8 is prevented from being broken when rotating.

In the embodiment, the number of the pawls 8 is preferably three. The advantages are that: too much quantity is not favorable for saving materials, and too little quantity is difficult to ensure the stability.

In the embodiment, the portion of the operating rod 74 contacting the trigger switch 75 is in an arc shape. The advantages are that: the contact stability of the operating lever 74 and the tact switch 75 is improved.

In the embodiment, the connecting rope 4 is detachably connected with the winding wheel 2. The advantages are that: is convenient for replacement and maintenance.

In an embodiment, the detachable connection between the connection rope 4 and the winding wheel 2 means that the end of the connection rope 4 is provided with a limiting block 41, one end of the winding wheel 2 protrudes radially to form a limiting part (because the winding wheel 2 is integrally provided with the driving gear 20, the limiting part and the driving gear 20 can be made into an integral structure), a through hole 22 for the limiting block 41 to pass through is arranged on the limiting part along the axial direction of the winding wheel 2 in a penetrating manner, and an accommodating hole 23 for accommodating the limiting block 41 and a communication hole 24 for communicating the accommodating hole 23 with the through hole 22 and only allowing a single connection rope 4 to pass through are arranged on one end face of the limiting part which is far away from the winding wheel 2 along the axial direction of the winding wheel 2. The advantages are that: the connection of the connecting rope 4 and the winding wheel 2 can be realized by firstly penetrating one end of the connecting rope 4 with a limiting part through the through hole 22 and then placing the connecting rope 4 into the accommodating hole 23 and ensuring that the connecting rope 4 is clamped into the communicating hole 24.

The working principle is as follows: as shown in fig. 2 to 4, since the spiral limiting groove 21 for accommodating the single connecting rope 4 is coaxially disposed on the outer circumferential surface of the winding wheel 2, when the two winding wheels 2 are driven by the motor 3 to pay off or take up (when the winding wheels 2 are driven by the motor 3 to rotate), and since the limiting slider and the limiting groove 21 are in sliding fit, and the guide block 5 can only move in the direction parallel to the axis of the winding wheel 2 under the limiting fit of the limiting rod 11 and the limiting hole, when the winding wheels 2 are driven by the motor 3 to rotate, the guide block 5 can also be driven to move in the axis of the winding wheel 2 while the winding wheels 2 rotate. In addition, each guide block 5 is provided with a thread passing hole 51 arranged along the tangential direction of the adjacent winding wheel 2, and the connecting rope 4 on the winding wheel 2 passes through the adjacent thread passing hole 51, so that when the guide block 5 moves along the axial direction of the winding wheel 2, the connecting rope 4 is pulled to be arranged along the limiting groove 21, and the connecting rope 4 is arranged along the axial direction of the winding wheel 2 in the process of winding and unwinding the wire. In addition, the connection rope 4 can be always guided along the limiting groove 21 under the action of a wire passage which is formed between the outer ring surface of the wire pressing wheel 6 and the limiting groove 21 on the outer ring surface of the winding wheel 2 and only allows a single connection rope 4 to pass through.

When the winding wheel 2 rotates, the pinion 71 coaxially connected with the winding wheel also drives the gearwheel 73 to rotate through the transmission gear set 72, and after the gearwheel 73 rotates, the operating rod 74 connected with the gearwheel 73 also rotates around the axis of the gearwheel 73; and since the two tact switches 75 are respectively located on the circular tracks made by the other ends of the two operating rods 74, when the operating rods 74 rotate to contact with the tact switches 75, the motor 3 can be controlled to stop rotating. And because the operating rod 74 and the large gear 73 are locked in one direction by the cooperation of the pawl 8 and the ratchet 732, the relative position of the operating rod 74 can be changed by rotating the pawl 8 clockwise (as shown in fig. 7), i.e. the top dead center and the bottom dead center of the lifting motion of the clothes hanger body 200 can be adjusted.

The adjusting process of the top dead center and the bottom dead center of the lifting motion of the clothes hanger body 200 is as follows: controlling the motor 3 to drive the two winding wheels 2 to wind up, and when the clothes hanger body 200 rises to the actually required highest point, controlling the motor 3 to stop operating and rotating one (right) operating rod 74 to contact with the adjacent touch switch 75 (as shown in fig. 8); then, the motor 3 is controlled to drive the two winding wheels 2 to pay off, and when the clothes hanger body 200 descends to the lowest point actually required, the other (left) operating rod 74 is rotated to contact the touch switch 75 adjacent thereto (as shown in fig. 10). In the subsequent use process of the clothes hanger, after the clothes hanger rises to the highest point, the right operating rod 74 can trigger the right touch switch 75, so as to control the motor 3 to stop operating, and further ensure that the clothes hanger body 200 stops rising immediately after rising to the highest point; when the clothes hanger descends to the lowest point, the left operating lever 74 will trigger the left trigger switch 75, so as to control the motor 3 to stop operating, thereby ensuring that the clothes hanger body 200 stops descending immediately after descending to the lowest point. The whole adjusting process is simple and convenient to operate and high in precision, and can be directly operated by bare hands without other tools.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A clothes hanger comprises an installation frame (100), a clothes hanger body (200) which is movably connected below the installation frame (100) in a lifting mode, and a driving device (300) which is arranged in the installation frame (100) and used for driving the clothes hanger body (200) to lift, wherein the driving device (300) comprises a shell (1) which is installed on the installation frame (100), two winding wheels (2) which are rotatably installed in the shell (1) and are arranged in a bilateral symmetry mode, and a motor (3) which is installed on the shell (1) and is used for driving the winding wheels (2), each winding wheel (2) is wound with a connecting rope (4) which is connected with the clothes hanger body (200), and the clothes hanger is characterized in that a spiral limiting groove (21) which is used for accommodating one connecting rope (4) is coaxially arranged on the outer ring surface of each winding wheel (2); the driving device (300) further comprises two guide blocks (5), the guide blocks (5) are movably connected to the shell (1) along the axis direction parallel to the winding wheel (2), the guide blocks (5) are provided with limiting sliding blocks, the two limiting sliding blocks are matched in the limiting grooves (21) in a sliding mode respectively, each guide block (5) is provided with a line passing hole (51) arranged along the tangential direction of the winding wheel (2) adjacent to the guide block, and the connecting rope (4) on the winding wheel (2) penetrates through the line passing hole (51) adjacent to the guide block.

2. The laundry rack of claim 1, wherein: the guide block (5) can be movably connected to the shell (1) along the axis direction parallel to the winding wheel (2), namely, a limiting rod (11) arranged along the axis direction parallel to the winding wheel (2) is arranged on the shell (1), and a limiting hole matched with the limiting rod (11) in a sliding mode is formed in the guide block (5).

3. The laundry rack of claim 1, wherein: the driving device (300) further comprises a wire pressing assembly, the wire pressing assembly comprises two wire pressing wheels (6), the wire pressing wheels (6) are rotatably installed on the shell (1), the axes of the wire pressing wheels (6) are parallel to the axis of the wire winding wheel (2), the axial width of each wire pressing wheel (6) is equivalent to that of the wire winding wheel (2), and a wire passing channel which can only be used for allowing a single connecting rope (4) to pass through is formed between the outer annular surface of each wire pressing wheel (6) and the limiting groove (21) on the outer annular surface of the wire winding wheel (2).

4. The laundry rack of claim 1, wherein: the driving device (300) further comprises a stopping assembly (7), the stopping assembly (7) comprises two small gears (71), two transmission gear sets (72), two large gears (73), two operating rods (74) and two touch switches (75) arranged on the shell (1), the two small gears (71) are respectively and coaxially connected to the two winding wheels (2), the transmission gear sets (72) and the large gears (73) can be rotatably arranged on the shell (1), and each small gear (71) is connected with the large gear (73) through one transmission gear set (72); one end of each of the two operating rods (74) is rotatably connected to the axis of each of the two large gears (73), and a locking mechanism for limiting the rotation of the operating rods (74) relative to the large gears (73) is arranged between each operating rod (74) and each large gear (73); the two touch switches (75) are respectively positioned on a circular track formed by the rotation of the other ends of the two operating rods (74) around the axis of the bull gear (73), and when the operating rods (74) rotate to be in contact with the touch switches (75), the touch switches (75) control the motor (3) to stop operating.

5. The laundry rack of claim 4, wherein: the locking mechanism comprises a pawl (8) made of elastic materials, a groove (731) with a cylindrical structure is coaxially arranged at one end, connected with the operating rod (74), of the large gear (73), ratchets (732) are arranged on the inner ring surface of the groove (731), the pawl (8) is installed on the operating rod (74), and the pawl (8) can rotate in a single direction to be matched with the ratchets (732).

6. The laundry rack of claim 5, wherein: the pawl (8) is of a bent structure, and the bent outer side of the pawl is adapted to the rotating direction of the pawl.

7. The laundry rack of claim 6, wherein: the number of the pawls (8) is three.

8. The laundry rack according to any one of claims 4-7, characterized in that: the part of the operating rod (74) contacted with the touch switch (75) is in an arc-shaped structure.

9. The laundry rack of claim 1, wherein: the connecting rope (4) is detachably connected with the winding wheel (2).

10. The laundry rack of claim 9, wherein: connecting between rope (4) and take-up pulley (2) for can dismantle the connection and indicate that the tip of connecting rope (4) is equipped with stopper (41), the radial protrusion of one end of take-up pulley (2) has a spacing portion, the axis direction along take-up pulley (2) in the spacing portion is run through and is equipped with through-hole (22) that can supply stopper (41) to pass, be equipped with on the axis direction of following take-up pulley (2) in the spacing portion and be used for holding accommodation hole (23) of stopper (41) and be used for communicateing accommodation hole (23) and through-hole (22) and only can supply the intercommunicating hole (24) that single connecting rope (4) passed through.