CN211619332U

CN211619332U - Simple elevator

Info

Publication number: CN211619332U
Application number: CN201921944166.3U
Authority: CN
Inventors: 廖佰坚; 陈林; 苏立伟; 吴超超
Original assignee: Zhejiang Canaan Technology Ltd
Current assignee: Zhejiang Canaan Technology Ltd
Priority date: 2019-11-12
Filing date: 2019-11-12
Publication date: 2020-10-02
Anticipated expiration: 2029-11-12

Abstract

The utility model relates to the technical field of hoisting machines, concretely relates to simple hoisting machine, including rotating base, stand, crossbeam, fork mechanism, receive and release line mechanism, assembly pulley and first wire rope, the stand is vertically installed on the top of rotating base, the crossbeam is horizontally installed on the top of stand, fork mechanism slidable mounting is at the outer wall of stand, receive and release line mechanism fixed mounting between rotating base and stand, the assembly pulley fixed mounting is on the crossbeam, first wire rope sets out from the work portion of receive and release line mechanism and is connected with the non-work portion fixed connection of fork mechanism after the assembly pulley direction; the elevator is convenient to operate, light and handy in structure, reliable in performance, simple to disassemble, assemble and clean, accurate in lifting height and rotation angle, and low in manufacturing cost and maintenance cost.

Description

Simple elevator

Technical Field

The utility model relates to a lifting machine technical field, concretely relates to simple and easy lifting machine.

Background

The hoist is large mechanical equipment for transportation by changing potential energy, such as a mine hoist, a dam-crossing hoist and the like. Broadly, elevators, overhead cranes, winches, stabilizers, cranes, hoist machines, etc. may be referred to as hoists. The hoister generally refers to large mechanical equipment with high power and high hoisting capacity. The flexible steel wire rope and the transported goods are dragged to move up and down through the power machinery to finish the transportation process, and the steel wire rope is an indispensable important part of the hoisting machinery.

The existing factory elevator is often driven by a motor, hydraulic pressure and the like, equipment is heavy and large, cost is high, maintenance is difficult, training period is long, and therefore a simple elevator operated manually is needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a simple and easy lifting machine, this lifting machine convenient operation, the structure is light and handy, the dependable performance, and the dismouting is washd simply, promotes height and rotation angle accuracy, and manufacturing cost and maintenance cost are low.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a simple and easy lifting machine, including rotating base, the stand, the crossbeam, the fork arm mechanism, receive and release line mechanism, assembly pulley and first wire rope, the stand is vertical to be installed on rotating base's top, crossbeam horizontal installation is on the top of stand, install the outer wall at the stand fork arm mechanism slidable, receive and release line mechanism fixed mounting between rotating base and stand, assembly pulley fixed mounting is on the crossbeam, first wire rope is from the work portion of receiving and release line mechanism through the assembly pulley after the direction with the non-work portion fixed connection of fork arm mechanism.

As an optimal scheme of a simple elevator, the rotating base comprises a cement pier, a bottom plate, a rotary support and a rotating rod, the bottom plate is fixedly installed on the cement pier, an outer ring of the rotary support is fixedly installed at the top of the bottom plate, the bottom end of the rotating rod is fixedly connected with an inner ring of the rotary support, and a winding and unwinding mechanism is fixedly connected with the rotating rod.

As a preferred scheme of the simple elevator, a handle is arranged on the side surface of the rotating rod.

As an optimal scheme of a simple elevator, a plurality of jacks uniformly distributed around the rotary support are arranged on the bottom plate, and bolts with working ends in clearance fit with the jacks are arranged on the side surface of the rotating rod.

As a preferred scheme of simple and easy lifting machine, receive and release line mechanism including frame, reel, reduction gear and crank, the upper and lower both ends of frame respectively with the bottom of stand and rotating base's top fixed connection, reduction gear fixed mounting is in one side of frame, reel fixed mounting is on the output shaft of reduction gear, the reel is located the inside of frame and is in under the stand, crank and the input shaft fixed connection of reduction gear, first wire rope's one end is around establishing on the reel.

As an optimal scheme of the simple elevator, the pulley block comprises a first support, a first fixed pulley, a second support and a second fixed pulley, the first support and the second support are fixedly installed at two ends of the cross beam respectively, the first fixed pulley and the second fixed pulley are rotatably installed on the first support and the second support respectively, and a first opening and a second opening which are located right below the first fixed pulley and the second fixed pulley are formed in the cross beam.

As a preferred scheme of simple and easy lifting machine, the fork arm mechanism is including the slider, first arm of force, the strengthening rib, second arm of force and a pair of fork arm, but the slider is installed on the stand vertically with sliding, the one end fixed mounting of first arm of force is on the slider, the other end of first arm of force extends outwards along the length direction level of crossbeam, the free end and the slider of the first arm of force of strengthening rib fixed connection, the middle-end and the first arm of force fixed connection of second arm of force, second arm of force level sets up and perpendicular with first arm of force, fork arm parallel arrangement is and respectively fixed mounting at the both ends of second arm of force, the direction of first arm of force is kept away from to the working end orientation of fork arm.

As an optimal scheme of the simple elevator, the fork rod mechanism further comprises a sleeve and a fastener, the second force arm is in a square tube shape, a first jack penetrating through the second force arm and far away from one side of the first force arm and a second jack penetrating through the second force arm and near one side of the first force arm are arranged at two ends of the second force arm, the first jack and the second jack are coaxial, the diameter of the first jack is smaller than that of the second jack, the fork rod is connected with the first jack in a socket-and-spigot manner, the sleeve is connected with the second jack in a socket-and-spigot manner, and the fork rod and the sleeve are fixedly connected through the fastener.

As a preferred scheme of the simple elevator, the elevator further comprises an anti-falling system, the anti-falling system comprises a connecting piece and a second steel wire rope, the connecting piece is fixedly installed at the bottom of the cross beam, the connecting piece is arranged at one end, close to the stand column, of the cross beam, two ends of the second steel wire rope are fixedly connected with the bottom of the connecting piece and the top of the cross beam respectively, and the length of the second steel wire rope is equal to the stroke of the fork rod mechanism.

The utility model has the advantages that:

when the lifting device works, equipment to be lifted is hung on the fork rod mechanism, the first steel wire rope is wound through the winding and unwinding mechanism, the first steel wire rope is gradually shortened and is guided through the pulley block, and then the fork rod mechanism is lifted upwards; after the fork rod mechanism rises to the required height, the orientation of the cross beam and the fork rod mechanism is changed by rotating the rotating base, so that the equipment reaches the specified position for in-place feeding.

1. The elevator is convenient to operate, light and handy in structure, reliable in performance and simple to disassemble, assemble and clean;

2. the lifting height and the rotating angle of the hoister are accurate;

3. the elevator has low manufacturing cost and maintenance cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a front view of a simple elevator according to an embodiment of the present invention;

fig. 2 is a perspective view of a simple elevator according to an embodiment of the present invention;

fig. 3 is a side view of a simple elevator according to an embodiment of the present invention;

FIG. 4 is a sectional view taken along line A-A of FIG. 3;

FIG. 5 is a partial enlarged view of FIG. 4 at B;

fig. 6 is an exploded perspective view of a rotating base of a simple elevator according to an embodiment of the present invention;

fig. 7 is a perspective exploded view of a beam and a pulley block of a simple elevator according to an embodiment of the present invention;

fig. 8 is an exploded perspective view of a fork lever mechanism of a simple elevator according to an embodiment of the present invention;

FIG. 9 is an enlarged view of a portion of FIG. 8 at C;

in the figure:

1. rotating the base; 1a, cement piers; 1b, a bottom plate; 1b1, jack; 1c, rotating and supporting; 1d, rotating a rod; 1d1, round tube; 1d2, connecting plate; 1d3, a first square tube; 1e, a handle; 1f, a bolt;

2. a column;

3. a cross beam; 3a, a first opening; 3b, a second opening;

4. a fork lever mechanism; 4a, a sliding block; 4a1, a second square tube; 4a2, rollers; 4b, a first force arm; 4c, reinforcing ribs; 4d, a second force arm; 4d1, first receptacle; 4d2, second receptacle; 4e, a fork rod; 4e1, plunger; 4e2, annular flange; 4e3, threaded hole; 4f, a sleeve; 4f1, vias; 4f2, stepped bore; 4g, fastening pieces; 4g1, shim; 4g2, bolt;

5. a take-up and pay-off mechanism; 5a, a frame; 5b, a reel; 5c, a speed reducer; 5d, a hand crank;

6. a pulley block; 6a, a first bracket; 6b, a first fixed pulley; 6c, a second bracket; 6d, a second fixed pulley;

7. a first wire rope;

8. an anti-fall system; 8a, a connecting piece; 8b and a second steel wire rope.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are used only for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms will be understood by those skilled in the art according to the specific circumstances.

In the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" or the like, if appearing to indicate a connection relationship between the components, is to be understood broadly, for example, as being either a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other components or may be in an interactive relationship with one another. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 9, the simple elevator comprises a rotating base 1, a stand column 2, a cross beam 3, a fork rod mechanism 4, a take-up and pay-off mechanism 5, a pulley block 6 and a first steel wire rope 7, wherein the stand column 2 is vertically installed on the top end of the rotating base 1, the cross beam 3 is horizontally installed on the top end of the stand column 2, the fork rod mechanism 4 is slidably installed on the outer wall of the stand column 2, the take-up and pay-off mechanism 5 is fixedly installed between the rotating base 1 and the stand column 2, the pulley block 6 is fixedly installed on the cross beam 3, and the first steel wire rope 7 is fixedly connected with a non-working part of the fork rod mechanism 4 after being guided by the pulley block 6 from a.

As shown in fig. 1 to 4, the upright post 2 and the cross beam 3 are square tubes, the first steel wire rope 7 penetrates through the insides of the upright post 2 and the cross beam 3 and is fixedly connected with the top end of the fork rod mechanism 4 from top to bottom through the turning direction of the pulley block 6, when the lifting device works, equipment to be lifted is hung on the fork rod mechanism 4, the first steel wire rope 7 is wound through the winding and unwinding mechanism 5, the first steel wire rope 7 is gradually shortened and is guided by the pulley block 6 to lift the fork rod mechanism 4 upwards; after the fork rod mechanism 4 is lifted to the required height, the orientation of the cross beam 3 and the fork rod mechanism 4 is changed by rotating the rotating base 1, so that the equipment reaches the specified position for working.

Rotating base 1 is including cement mound 1a, bottom plate 1b, gyration support 1c and bull stick 1d, and bottom plate 1b fixed mounting is on cement mound 1a, and the outer lane fixed mounting that gyration supported 1c is at the top of bottom plate 1b, and the bottom of bull stick 1d and the inner circle fixed connection that gyration supported 1c, take up paying out machine and construct 5 and bull stick 1d fixed connection.

As shown in fig. 6, the bottom plate 1b is fixedly installed on the cement pier 1a through an anchor bolt and a nut, the rotating rod 1d comprises a circular tube 1d1, a connecting plate 1d2 and a first square tube 1d3 which are sequentially connected from bottom to top, the circular tube 1d1 and the first square tube 1d3 are coaxial and are welded into a whole through the connecting plate 1d2, and the circular tube 1d1 is fixedly connected with an inner ring of the rotation support 1c, so that the circular tube 1d1 can be rotatably installed on the bottom plate 1b, and further the first square tube 1d3 can drive the take-up and pay-off mechanism 5 and the upright post 2 to rotate around a vertical rotating shaft on the bottom plate 1 b.

A handle 1e is attached to the side surface of the rotary rod 1 d.

As shown in fig. 6, a handle 1e is installed at a side of the first square pipe 1d3 so that a worker can hold the handle 1e to more easily rotate the rotating bar 1 d.

The bottom plate 1b is provided with a plurality of insertion holes 1b1 uniformly distributed around the rotary support 1c, and the side surface of the rotating rod 1d is provided with a bolt 1f with a working end in clearance fit with the insertion hole 1b 1.

As shown in fig. 6, the working end of the latch 1f can be lifted and rotated to be disengaged from the socket 1b1, and the working end of the latch 1f can also be rotated and lowered to be inserted into the socket 1b1, so that the latch 1f can limit the rotation of the rotating rod 1 d; when the orientation of the cross beam 3 and the fork rod mechanism 4 needs to be changed, the worker lifts the bolt 1f to separate from the insertion hole 1b1, and when the orientation of the cross beam 3 and the fork rod mechanism 4 needs to be fixed, the worker lowers the bolt 1f to insert into the insertion hole 1b 1.

The take-up and pay-off mechanism 5 comprises a frame 5a, a reel 5b, a speed reducer 5c and a hand crank 5d, wherein the upper end and the lower end of the frame 5a are fixedly connected with the bottom end of the upright post 2 and the top end of the rotating base 1 respectively, the speed reducer 5c is fixedly installed on one side of the frame 5a, the reel 5b is fixedly installed on an output shaft of the speed reducer 5c, the reel 5b is located inside the frame 5a and is located right below the upright post 2, the hand crank 5d is fixedly connected with the input shaft of the speed reducer 5c, and one end of a first steel wire rope 7 is wound on the reel 5 b.

As shown in fig. 5, the first wire rope 7 is wound and unwound on the reel 5b, and the operator rotates the handle 5d to output torque to the reel 5b through the speed reducer 5c, so that the reel 5b rotates to wind or unwind the first wire rope 7.

The pulley block 6 comprises a first support 6a, a first fixed pulley 6b, a second support 6c and a second fixed pulley 6d, the first support 6a and the second support 6c are fixedly mounted at two ends of the cross beam 3 respectively, the first fixed pulley 6b and the second fixed pulley 6d are rotatably mounted on the first support 6a and the second support 6c respectively, and a first opening 3a and a second opening 3b which are located under the first fixed pulley 6b and the second fixed pulley 6d are formed in the cross beam 3.

As shown in fig. 7, each of the first bracket 6a and the second bracket 6c includes a flat plate covered on the end surface of the cross beam 3 by a bolt and a connecting plate vertically welded on the flat plate, a rotating shaft is fixedly installed at a suspended end of the connecting plate, a first fixed pulley 6b and a second fixed pulley 6d are rotatably installed on the rotating shaft, the first opening 3a and the second opening 3b are used for avoiding a first steel wire rope 7, and the first steel wire rope 7 passes through the upright post 2, the second opening 3b, the second fixed pulley 6d, the first fixed pulley 6b and the first opening 3a from the take-up and pay-off mechanism 5 in sequence, then vertically extends downwards and is fixedly connected with a hanging ring on the top surface of the fork rod mechanism 4 through a hanging hook.

The fork rod mechanism 4 comprises a sliding block 4a, a first force arm 4b, a reinforcing rib 4c, a second force arm 4d and a pair of fork rods 4e, wherein the sliding block 4a is vertically and slidably mounted on the upright post 2, one end of the first force arm 4b is fixedly mounted on the sliding block 4a, the other end of the first force arm 4b horizontally extends outwards along the length direction of the cross beam 3, the reinforcing rib 4c is fixedly connected with the suspended end of the first force arm 4b and the sliding block 4a, the middle end of the second force arm 4d is fixedly connected with the first force arm 4b, the second force arm 4d is horizontally arranged and perpendicular to the first force arm 4b, the fork rods 4e are arranged in parallel and respectively and fixedly mounted at two ends of the second force arm 4d, and the working end of the fork rod 4e faces the direction far away from the first force arm 4 b.

As shown in fig. 8, the sliding block 4a includes a second square tube 4a1 sleeved outside the upright 2 and rollers 4a2 clamped on both sides of the upright 2, the rollers 4a2 are rollably mounted inside the second square tube 4a1, the second square tube 4a1 is sleeved outside the upright 2 through the rollers 4a2, the first force arm 4b and the second force arm 4d are used for fixing the fork rod 4e, the reinforcing rib 4c is used for reinforcing the strength of the first force arm 4b, and the fork rod 4e is used for forking and lifting the device.

The fork rod mechanism 4 further comprises a sleeve 4f and a fastening member 4g, the second force arm 4d is in a square tube shape, both ends of the second force arm 4d are provided with a first insertion hole 4d1 penetrating through one side of the second force arm 4d, which is far away from the first force arm 4b, and a second insertion hole 4d2 penetrating through one side of the second force arm 4d, which is close to the first force arm 4b, the first insertion hole 4d1 is coaxial with the second insertion hole 4d2, the diameter of the first insertion hole 4d1 is smaller than that of the second insertion hole 4d2, the fork rod 4e is in socket connection with the first insertion hole 4d1, the sleeve 4f is in socket connection with the second insertion hole 4d2, and the fork rod 4e and the sleeve 4f are fixedly connected through the fastening member 4 g.

As shown in fig. 8 and 9, the end of the fork rod 4e facing the second force arm 4d is provided with a plunger 4e1 which is in clearance fit with the first socket 4d1, the length of the plunger 4e1 is equal to the distance between the inner walls of the second force arm 4d, the end of the plunger 4e1 far away from the second force arm 4d is provided with an annular flange 4e2 which extends radially outwards, the plunger 4e1 is inserted into the first socket 4d1, and the annular flange 4e2 abuts against the outer wall of the second force arm 4d, so that the socket connection of the fork rod 4e and the second force arm 4d is formed;

the outer wall of the sleeve 4f is in clearance fit with the second insertion hole 4d2, a through hole 4f1 which axially penetrates through the sleeve 4f is formed in the sleeve 4f, the through hole 4f1 is in clearance fit with the plunger 4e1, the sleeve 4f is inserted into the second insertion hole 4d2, the bottom end of the sleeve 4f abuts against the inner wall of the second force arm 4d which surrounds the outer side of the first insertion hole 4d1, and therefore socket connection of the sleeve 4f and the second force arm 4d is formed;

one end of the sleeve 4f, which is far away from the second force arm 4d, is provided with a stepped hole 4f2 which is coaxial with the through hole 4f1, the fastener 4g comprises a gasket 4g1 and a bolt 4g2, the gasket 4g1 is in clearance fit with the stepped hole 4f2, one end of the plunger 4e1, which faces the second force arm 4d, is provided with a threaded hole 4e3, the bolt 4g2 is in threaded fit with the threaded hole 4e3, the gasket 4g1 is inserted into the bolt 4g2, the bottom surface of the gasket 4g1 abuts against the bottom surface of the stepped hole 4f2, and the bolt 4g2 penetrates through the gasket 4g1 and the sleeve 4f to be in threaded connection with the threaded hole 4e3, so that the fork rod 4e and the sleeve 4f are coaxially clamped on the second.

The anti-falling device is characterized by further comprising an anti-falling system 8, wherein the anti-falling system 8 comprises a connecting piece 8a and a second steel wire rope 8b, the connecting piece 8a is fixedly installed at the bottom of the cross beam 3, the connecting piece 8a is arranged at one end, close to the stand column 2, of the cross beam 3, two ends of the second steel wire rope 8b are fixedly connected with the bottom of the connecting piece 8a and the top of the cross beam 3 respectively, and the length of the second steel wire rope 8b is equal to the stroke of the fork rod mechanism.

As shown in fig. 1 to 3, a through hole through which a second steel wire rope 8b can pass is formed in the bottom of the connecting member 8a, one end of the second steel wire rope 8b is fixedly connected with a lifting ring fixedly mounted at the top of the cross beam 3 through a lifting hook, the other end of the second steel wire rope 8b passes through the through hole in the bottom of the connecting member 8a and is fixedly connected with a stop nut, when the fork mechanism 4 is unhooked from the first steel wire rope 7, the fork mechanism 4 rapidly falls under the action of gravity, and the second steel wire rope 8b is straightened when the fork mechanism 4 falls to a certain height, so that the fork mechanism 4 stops falling continuously, and further personal safety of equipment and workers is effectively protected.

The utility model discloses a theory of operation:

the simple hoister is mainly used for hoisting a loading part to feed a mixer, the loading part is lowered to the ground after loading is finished, disassembly, assembly and cleaning are convenient, during work, a vacuum loading machine to be hoisted is hung on a fork rod mechanism 4, a first steel wire rope 7 is wound through a winding and unwinding mechanism 5, the first steel wire rope 7 is gradually shortened and is guided through a first fixed pulley 6b and a second fixed pulley 6d to lift the fork rod mechanism 4 upwards; after the fork rod mechanism 4 is lifted to a required height, the orientation of the cross beam 3 and the fork rod mechanism 4 is changed by rotating the rotating base 1, so that the vacuum feeding machine reaches a specified position to perform in-place feeding.

It should be understood that the above-described embodiments are merely illustrative of the preferred embodiments of the present invention and the technical principles thereof. It will be understood by those skilled in the art that various modifications, equivalents, changes, and the like can be made to the present invention. However, these modifications are within the scope of the present invention as long as they do not depart from the spirit of the present invention. In addition, certain terms used in the specification and claims of the present application are not limiting, but are used merely for convenience of description.

Claims

1. The utility model provides a simple and easy lifting machine, a serial communication port, including rotating base (1), stand (2), crossbeam (3), fork arm mechanism (4), receive and release line mechanism (5), assembly pulley (6) and first wire rope (7), stand (2) vertical installation is on the top of rotating base (1), crossbeam (3) horizontal installation is on the top of stand (2), install the outer wall at stand (2) fork arm mechanism (4) slidable, receive and release line mechanism (5) fixed mounting between rotating base (1) and stand (2), assembly pulley (6) fixed mounting is on crossbeam (3), first wire rope (7) are from the work portion of receiving and releasing line mechanism (5) through assembly pulley (6) after the direction with the non-work portion fixed connection of fork arm mechanism (4).

2. The simple elevator as defined in claim 1, wherein the rotating base (1) comprises a cement pier (1 a), a bottom plate (1 b), a rotary support (1 c) and a rotating rod (1 d), the bottom plate (1 b) is fixedly mounted on the cement pier (1 a), an outer ring of the rotary support (1 c) is fixedly mounted on the top of the bottom plate (1 b), the bottom end of the rotating rod (1 d) is fixedly connected with an inner ring of the rotary support (1 c), and the winding and unwinding mechanism (5) is fixedly connected with the rotating rod (1 d).

3. The simple elevator as claimed in claim 2, wherein the handle (1 e) is mounted on the side of the rotating rod (1 d).

4. The simple hoisting machine as claimed in claim 2, wherein the bottom plate (1 b) is provided with a plurality of jacks (1 b 1) uniformly distributed around the rotating support (1 c), and the side surface of the rotating rod (1 d) is provided with a bolt (1 f) with a working end in clearance fit with the jack (1 b 1).

5. The simple hoister according to claim 1, characterized in that the take-up and pay-off mechanism (5) comprises a frame (5 a), a reel (5 b), a speed reducer (5 c) and a hand crank (5 d), wherein the upper end and the lower end of the frame (5 a) are fixedly connected with the bottom end of the upright post (2) and the top end of the rotating base (1) respectively, the speed reducer (5 c) is fixedly installed on one side of the frame (5 a), the reel (5 b) is fixedly installed on the output shaft of the speed reducer (5 c), the reel (5 b) is located inside the frame (5 a) and is located right below the upright post (2), the hand crank (5 d) is fixedly connected with the input shaft of the speed reducer (5 c), and one end of the first steel wire rope (7) is wound on the reel (5 b).

6. The simple elevator as defined in claim 1, wherein the pulley block (6) comprises a first bracket (6 a), a first fixed pulley (6 b), a second bracket (6 c) and a second fixed pulley (6 d), the first bracket (6 a) and the second bracket (6 c) are respectively and fixedly mounted at two ends of the cross beam (3), the first fixed pulley (6 b) and the second fixed pulley (6 d) are respectively and rotatably mounted on the first bracket (6 a) and the second bracket (6 c), and the cross beam (3) is provided with a first opening (3 a) and a second opening (3 b) which are located under the first fixed pulley (6 b) and the second fixed pulley (6 d).

7. The simple elevator as claimed in claim 1, wherein the fork mechanism (4) comprises a slider (4 a), a first force arm (4 b), a reinforcing rib (4 c), a second force arm (4 d) and a pair of fork rods (4 e), the slider (4 a) is vertically slidably mounted on the column (2), one end of the first force arm (4 b) is fixedly mounted on the slider (4 a), the other end of the first force arm (4 b) extends horizontally and outwardly along the length direction of the beam (3), the reinforcing rib (4 c) is fixedly connected with the suspended end of the first force arm (4 b) and the slider (4 a), the middle end of the second force arm (4 d) is fixedly connected with the first force arm (4 b), the second force arm (4 d) is horizontally arranged and perpendicular to the first force arm (4 b), the fork rods (4 e) are arranged in parallel and are respectively and fixedly mounted at two ends of the second force arm (4 d), the working end of the fork rod (4 e) faces away from the first force arm (4 b).

8. The simple elevator as claimed in claim 7, wherein the fork mechanism (4) further comprises a sleeve (4 f) and a fastening member (4 g), the second force arm (4 d) is in the shape of a square tube, both ends of the second force arm (4 d) are provided with a first insertion hole (4 d 1) penetrating through the second force arm (4 d) at a side away from the first force arm (4 b) and a second insertion hole (4 d 2) penetrating through the second force arm (4 d) at a side close to the first force arm (4 b), the first insertion hole (4 d 1) and the second insertion hole (4 d 2) are coaxial, the diameter of the first insertion hole (4 d 1) is smaller than that of the second insertion hole (4 d 2), the fork (4 e) is in socket connection with the first insertion hole (4 d 1), the sleeve (4 f) is in socket connection with the second insertion hole (4 d 2), and the fork (4 e) and the sleeve (4 f) are fixedly connected through the fastening member (4 g).

9. The simple elevator as claimed in claim 1, further comprising an anti-falling system (8), wherein the anti-falling system (8) comprises a connecting member (8 a) and a second steel wire rope (8 b), the connecting member (8 a) is fixedly mounted at the bottom of the cross beam (3), the connecting member (8 a) is disposed at one end of the cross beam (3) close to the column (2), two ends of the second steel wire rope (8 b) are respectively fixedly connected with the bottom of the connecting member (8 a) and the top of the cross beam (3), and the length of the second steel wire rope (8 b) is equal to the stroke of the fork lever mechanism (4).