CN115353025A

CN115353025A - Lifting machine for construction

Info

Publication number: CN115353025A
Application number: CN202211006954.4A
Authority: CN
Inventors: 贺良国; 施斌; 郑冬冬; 邬丞洋; 柳晓波
Original assignee: Zhongke Sunbroad Construction Group Co ltd
Current assignee: Zhongke Sunbroad Construction Group Co ltd
Priority date: 2022-08-22
Filing date: 2022-08-22
Publication date: 2022-11-18
Anticipated expiration: 2042-08-22
Also published as: CN115353025B

Abstract

The invention discloses a lifter for building construction, which relates to the field of lifting of building materials and solves the problem that the binding of a large glass block by the conventional lifting device is very troublesome during lifting and transportation of the glass block.

Description

Lifting machine for construction

Technical Field

The invention relates to the field of building material lifting, in particular to a lifting machine for building construction.

Background

In the building construction process, can often use the lifting machine to carry building material, alleviate artifical burden through the mode of mechanical transport to can effectual improvement building efficiency, current foreign-style house or bungalow construction in-process can be according to the requirement of construction drawing, at the sitting room installation panoramic glass, its panoramic glass also can carry through the lifting machine.

However, when the existing elevator for conveying glass is used, a material frame of the elevator is only a simple liftable L-shaped frame, after a worker leans on glass on the frame on the ground, in order to ensure the stability of the glass in the conveying process, the glass needs to be fixed on the frame through a rope or other binding tools, and after the glass is conveyed to a designated position above, the glass needs to be disassembled by workers on floors above the glass.

Disclosure of Invention

The invention aims to provide a building construction elevator capable of automatically and stably limiting a large glass block so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a lifting machine for building construction comprises a frame body and an electric motor fixedly installed at the bottom of the frame body, wherein a winding wheel is fixedly sleeved at the output end of the electric motor, a traction rope is wound on the outer surface of the winding wheel, a sliding rod is slidably installed inside the frame body, a supporting plate is installed at the front end of the frame body in an attaching mode, a connecting block is fixedly installed at the back of the supporting plate and rotatably sleeved on the outer side of the sliding rod, one end, far away from the winding wheel, of the traction rope is fixedly embedded at the top of the supporting plate, a guide rod is fixedly installed on one side, far away from the supporting plate, of the top of the frame body, and the traction rope is sleeved on the outer side of the guide rod; the buckling mechanism for automatically clamping the large glass is arranged on the inner side of the frame body, and the upper end of the buckling mechanism is also provided with a transmission mechanism; the driving mechanism can be reversely triggered in the overturning process of the supporting plate, the shifting mechanism is arranged between the sliding rod and the supporting plate, and the whole frame body is leaned against a wall body when the lifting frame is used, wherein the part of the guide rod is higher than a platform of a second floor.

Preferably, the fastening mechanism including slide inlay in the inside two sets of tight arms of clamp of support body, and two sets of the tight arm of clamp is the staggered distribution, and is two sets of install gear three between the tight arm of clamp, just gear three cross the spliced pole one with the layer board is for rotating the connection, and is two sets of the equal fixed mounting in a side in opposite directions of tight arm of clamp has a plurality of tooth, just tooth with three swing joint of gear, distribute in one of top the upper end of pressing from both sides tight arm is installed gear two, just gear two cross the spliced pole two rotate install in the inside of layer board, the drive belt is installed in the transmission between spliced pole one and the spliced pole two, through two synchronous phase removal of pressing from both sides tight arm, can carry out spacing clamp to big glass's both sides.

Preferably, the transmission mechanism comprises a fixing column fixedly embedded in the supporting plate, the fixing column is located above the second gear, a first gear is concentrically installed on the outer side of the fixing column, the first gear is in sliding connection with the supporting plate, a coil spring is fixedly installed between the fixing column and the first gear, the first gear is movably meshed with the second gear, a trigger assembly is installed on the outer side of the first gear, and after the glass completely leans against the supporting plate, the trigger assembly can be triggered by gravity to enable the first gear to rotate.

Preferably, the trigger subassembly include fixed mounting in the fixed block seat of a gear side, just the inside slidable mounting of fixed block seat has the sliding block, the sliding block is kept away from the one end fixed mounting of gear one has spring two, the sliding block is kept away from the cardboard is installed through the torsional spring to fixed block seat one end, gear one is close to the one end fixed mounting of support body has the ratchet, just the cardboard with ratchet swing joint, the rear end fixed mounting of sliding block has the stopper, just the stopper with cardboard activity laminating, the preceding terminal surface of stopper with the inner wall of layer board slides the laminating, the chute has been seted up to the inside of stopper, the front end of layer board slides and has inlayed oblique end ejector pad, oblique end ejector pad is close to the one end of stopper is the inclined plane, and with chute slide the laminating, when oblique end ejector pad received the pushing, the laminating of accessible oblique end ejector pad rear end and chute makes the stopper move towards the direction opposite with the gear.

Preferably, toggle mechanism include through spacing slip inlay in the sliding tooth plate at layer board back, the outer fixed surface of slide bar installs the tooth piece, just the tooth piece with sliding tooth plate movable meshing, there is the slide bar inside of layer board through a frame piece fixed mounting, just the sliding sleeve has been cup jointed in the surface slip of slide bar, install spring one between the bottom of sliding sleeve and the frame piece, just the spring cup joint in the outside of slide bar, sliding tooth plate's front end slip inlay in the inboard of sliding sleeve, the sliding sleeve with install between the gear one and bulldoze the subassembly, the layer board is at the upset in-process, through the movable meshing of sliding tooth plate and tooth piece, can make sliding tooth plate remove towards the direction of gear one.

Preferably, bulldoze the subassembly including slide inlay in the inside sliding tooth of a plurality of sliding sleeve, the flank of tooth of sliding tooth is close to gear one, the sliding tooth is kept away from the articulated arm that pushes away of one end of gear one, a plurality of push away the common articulated connecting plate of installing in the arm outside, distribute in one of bottom push away the lower terminal surface laminating of arm and install to support the piece, just support the piece with fixed mounting has spring three between the sliding sleeve, and it pushes away the arm and after receiving sliding tooth plate's promotion, a plurality of sliding tooth can stretch out from the inside of sliding sleeve.

Preferably, the stiffness of the third spring is smaller than that of the first spring, so that the third spring is compressed first in the sliding process of the sliding toothed plate, and the first spring is compressed after the third spring is compressed to the minimum value.

Preferably, the rack that a plurality of is the circumference and distributes is installed in the outside of connecting block, just the upper end fixed mounting of support body has the spur-tooth plate, the rack with spur-tooth plate movable engagement, first rack and last contained angle between the rack is ninety degrees, just the quantity of rack with the number of teeth of spur-tooth plate is unanimous, and under pulling of haulage rope, the slide bar passes through the connecting block and drives the layer board and remove to the top, removes to the top in-process, and the rack in its connecting block outside can mesh with the spur-tooth plate for the layer board overturns.

Preferably, the clamping short plates of the two groups of clamping arms are fixedly provided with rubber pads which are distributed in opposite directions, and the purpose of the rubber pads can increase the friction force between the clamping arms and the glass.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, through the matching of the buckling mechanism and the transmission mechanism, after the glass plate leans against the supporting plate, the gravity can trigger the trigger assembly, so that the trigger assembly does not limit the first gear, and the first gear rapidly rotates under the action of the coil spring, so that the two groups of clamping arms synchronously move in opposite directions, the glass is automatically clamped, and the stability of glass transportation is improved;

2. according to the invention, under the action of the rack, the straight-tooth plate and the toggle mechanism, after the sliding rod drives the supporting plate to move to the uppermost end, the supporting plate can be turned upwards for ninety degrees under the continuous pulling of the traction rope and through the movable meshing of the rack and the straight-tooth plate, so that the glass can be moved to a second floor platform in a flat state, and the glass is convenient for workers to take and place.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of another overall perspective structure of the present invention;

FIG. 3 is a schematic view of the turning structure of the connecting block and the supporting plate of the present invention;

FIG. 4 is a schematic view of the internal structure of the pallet of the present invention;

FIG. 5 is a schematic view of the tooth block and sliding tooth plate structure of the present invention;

FIG. 6 is an enlarged view taken at A of FIG. 5 in accordance with the present invention;

FIG. 7 is a schematic view of the structure of the inclined bottom pushing block and the inclined groove of the present invention;

fig. 8 is a schematic view of the sliding tooth and spring structure of the present invention.

In the figure: 1-a frame body; 2-an electric motor; 3-a winding wheel; 4-a hauling rope; 5-a guide rod; 6-a supporting plate; 7-connecting blocks; 8-a slide bar; 9-a rack; 10-a straight tooth plate; 11-a fastening mechanism; 12-a trigger component; 13-a toggle mechanism; 14-a transmission mechanism; 15-a pushing assembly; 16-a tooth block; 17-a sliding sleeve; 18-sliding toothed plate; 19-gear one; 20-fixing the column; 21-coil spring; 22-ratchet wheel; 23-gear two; 24-gear three; 25-a transmission belt; 26-a clamping arm; 27-a slide bar; 28-spring one; 29-a fixed block seat; 30-a sliding block; 31-a stopper; 32-cardboard; 33-spring two; 34-a chute; 35-an inclined bottom pushing block; 36-sliding teeth; 37-a push arm; 38-a connecting plate; 39-spring three; 40-a resisting block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1-3, a building construction elevator shown in the figure comprises a frame body 1 and a motor 2 fixedly mounted at the bottom of the frame body 1, wherein a winding wheel 3 is fixedly sleeved at the output end of the motor 2, a traction rope 4 is wound around the outer surface of the winding wheel 3, a sliding rod 8 is slidably mounted inside the frame body 1, a supporting plate 6 is mounted at the front end of the frame body 1 in an attaching manner, a connecting block 7 is fixedly mounted at the back of the supporting plate 6, the connecting block 7 is rotatably sleeved outside the sliding rod 8, one end of the traction rope 4, which is far away from the winding wheel 3, is fixedly embedded at the top of the supporting plate 6, a guide rod 5 is fixedly mounted at one side, which is far away from the supporting plate 6, of the top of the frame body 1, and the traction rope 4 is sleeved outside the guide rod 5; the buckling mechanism 11 is arranged on the inner side of the frame body 1, and the transmission mechanism 14 is also arranged at the upper end of the buckling mechanism 11; the toggle mechanism 13 can reversely touch the transmission mechanism 14 in the overturning process of the supporting plate 6, the toggle mechanism 13 is arranged between the sliding rod 8 and the supporting plate 6, and when the support body is used, the whole support body 1 is leaned against a wall body, wherein the part of the guide rod 5 is higher than a platform of a second floor.

Referring to fig. 4, in the figure, the buckling mechanism 11 includes two sets of clamping arms 26 slidably embedded in the frame body 1, and the two sets of clamping arms 26 are distributed in a staggered manner, a gear three 24 is installed between the two sets of clamping arms 26, and the gear three 24 is rotatably connected with the supporting plate 6 through a connecting column one, a plurality of meshing teeth are fixedly installed on opposite sides of the two sets of clamping arms 26, and the meshing teeth are movably engaged with the gear three 24, a gear two 23 is installed at the upper end of one clamping arm 26 distributed above, and the gear two 23 is rotatably installed in the supporting plate 6 through a connecting column two, a transmission belt 25 is installed between the connecting column one and the connecting column two in a transmission manner, and two sides of a large piece of glass can be limited and clamped through synchronous opposite movement of the two clamping arms 26.

Referring to fig. 5, in the drawing, the transmission mechanism 14 includes a fixed column 20 fixedly embedded in the supporting plate 6, the fixed column 20 is located above the second gear 23, the first gear 19 is concentrically installed on the outer side of the fixed column 20, the first gear 19 is slidably connected with the supporting plate 6, a coil spring 21 is fixedly installed between the fixed column 20 and the first gear 19, the first gear 19 is movably engaged with the second gear 23, the trigger assembly 12 is installed on the outer side of the first gear 19, and after the glass completely abuts against the supporting plate 6, the trigger assembly 12 can be triggered by gravity to rotate the first gear 19.

Referring to fig. 6 and 7, in the figure, the trigger assembly 12 includes a fixed block seat 29 fixedly mounted on a side of the first gear 19, a sliding block 30 is slidably mounted inside the fixed block seat 29, one end of the sliding block 30, which is far away from the first gear 19, is fixedly mounted with a second spring 33, one end of the sliding block 30, which is far away from the fixed block seat 29, is mounted with a catch plate 32 through a torsion spring, one end of the first gear 19, which is close to the frame 1, is fixedly mounted with a ratchet 22, the catch plate 32 is movably engaged with the ratchet 22, a rear end of the sliding block 30 is fixedly mounted with a stopper 31, the stopper 31 is movably engaged with the catch plate 32, a front end surface of the stopper 31 is slidably engaged with an inner wall of the support plate 6, an inclined groove 34 is formed inside the stopper 31, an inclined bottom push block 35 is slidably embedded in a front end of the support plate 6, one end of the inclined bottom push block 35, which is close to the stopper 31, is slidably engaged with the inclined groove 34, and when the inclined bottom push block 35 is pushed, the inclined bottom push block 35 can be engaged with the rear end of the inclined bottom push block 35, so that the stopper 31 moves in a direction opposite to the first gear 19.

Referring to fig. 1 and 4, rubber pads are fixedly installed at the short clamping plates of the two clamping arms 26, and the two rubber pads are distributed in opposite directions, so as to increase the friction between the clamping arms 26 and the glass.

Can be to the automatic spacing firm theory of operation of bold glass: when a user uses the lifting device to transport large glass blocks, the frame body 1 is placed against a wall body, the guide rod 5 at the upper end of the frame body 1 is located in a second floor space, when the glass is placed at the front end of the supporting plate 6 and leans against the front end surface of the supporting plate 6, the gravity of the glass can push the inclined bottom pushing block 35, the inclined bottom pushing block 35 can push the limiting block 31 in the process of moving towards the inside of the supporting plate 6, the limiting block 31 drives the sliding block 30 to move in the direction away from the first gear 19, the second spring 33 is compressed, after the inclined bottom pushing block 35 is moved, the clamping plate 32 is not meshed with the ratchet wheel 22, the first gear 19 is not limited any more, the first gear 19 rotates rapidly and anticlockwise under the action of the coil spring 21 in a force storage state, the third gear 24 rotates under the action of the second gear 23 and the driving belt 25, the two clamping arms 26 can synchronously and reversely move in the rotating process, and the clamping arms 26 can firmly clamp the glass, so that automatic and stable limiting during the large glass blocks during lifting and transportation can be replaced by manual binding and stable work limiting.

Example 2

Referring to fig. 5 and 8, in this embodiment, as further described in embodiment 1, the toggle mechanism 13 includes a sliding toothed plate 18 slidably embedded in the back of the supporting plate 6 through a limiting bar, a toothed block 16 is fixedly installed on an outer surface of the sliding rod 8, the toothed block 16 is movably engaged with the sliding toothed plate 18, a sliding rod 27 is fixedly installed inside the supporting plate 6 through a frame block, a sliding sleeve 17 is slidably sleeved on an outer surface of the sliding rod 27, a first spring 28 is installed between a bottom of the sliding sleeve 17 and the frame block, the first spring 28 is sleeved on an outer side of the sliding rod 27, a front end of the sliding toothed plate 18 is slidably embedded in an inner side of the sliding sleeve 17, a pushing component 15 is installed between the sliding sleeve 17 and the first gear 19, and the sliding toothed plate 18 is movably engaged with the toothed block 16 during the tilting process of the supporting plate 6, so that the sliding toothed plate 18 can move toward the first gear 19.

Referring to fig. 8, the pushing assembly 15 includes a plurality of sliding teeth 36 slidably embedded in the sliding sleeve 17, a tooth surface of the sliding teeth 36 is close to the first gear 19, a pushing arm 37 is pivotally mounted at one end of the sliding teeth 36 away from the first gear 19, a connecting plate 38 is pivotally mounted at the outer side of the plurality of pushing arms 37 together, a resisting block 40 is mounted at the lower end surface of the pushing arm 37 distributed at the lowermost end in a fitting manner, a third spring 39 is fixedly mounted between the resisting block 40 and the sliding sleeve 17, and after the pushing arm 37 is pushed by the sliding toothed plate 18, the plurality of sliding teeth 36 can extend out from the inside of the sliding sleeve 17.

Referring to fig. 8, the stiffness of the third spring 39 is smaller than the stiffness of the first spring 28 in the drawing to ensure that the third spring 39 is compressed first and then the first spring 28 is compressed after the third spring 39 is compressed to the minimum value in the sliding process of the sliding tooth plate 18.

In this embodiment: in the process of rolling and pulling the traction rope 4 under the action of the motor 2 and the rolling wheel 3, the supporting plate 6, the connecting block 7 and the sliding rod 8 can slide upwards at the same time, after the traction rope slides to the topmost end, namely the sliding rod 8 is limited by the frame body 1, at the moment, the traction rope 4 continuously pulls the supporting plate 6, and the connecting block 7 is not distributed at the topmost end of the back of the supporting plate 6 but distributed at the middle part of the back of the supporting plate 6 in a certain proportion, namely, under the condition of pulling of the traction rope 4 and limiting of the connecting block 7, the supporting plate 6 at the moment is similar to a lever, the turnover condition can occur, and can be turned for ninety degrees, so that the supporting plate 6 with glass horizontally enters a second floor space;

during the overturning process of the supporting plate 6, the sliding toothed plate 18 can slide towards the direction of the first gear 19 through the meshing of the toothed block 16 and the sliding toothed plate 18, when the sliding toothed plate 18 moves, the pushing arm 37 can be pushed first to compress the third spring 39, when the pushing arm 37 is pushed, the sliding teeth 36 can be pushed out from the inside of the sliding sleeve 17, after the third spring 39 is compressed to the maximum value, the sliding toothed plate 18 can continuously slide to push the whole sliding sleeve 17 and compress the first spring 28, at the moment, the sliding sleeve 17 moves with the extending sliding teeth 36, namely, the sliding teeth can be meshed with the first gear 19 during sliding, the first gear 19 rotates clockwise to enable the two clamping arms 26 to synchronously and reversely move, a certain distance is unfolded, at the moment, a worker can take off glass between the glass, after the taking-off is completed, the motor 2 drives the winding wheel 3 to reversely rotate, at the supporting plate 6 can reset and swing under the action of self gravity and slides downwards.

Example 3

Referring to fig. 2, in this embodiment, for other embodiments, a plurality of racks 9 distributed circumferentially are mounted on the outer side of the connecting block 7, a straight rack plate 10 is fixedly mounted at the upper end of the frame body 1, the racks 9 are movably engaged with the straight rack plate 10, an included angle between the first rack 9 and the last rack 9 is ninety degrees, and the number of the racks 9 is the same as the number of teeth of the straight rack plate 10.

In this embodiment: under the pulling of the hauling rope 4, the sliding rod 8 drives the supporting plate 6 to move to the top through the connecting block 7, and in the process of moving to the top, the rack 9 on the outer side of the connecting block 7 can be meshed with the straight tooth plate 10 to assist the supporting plate 6 to turn over.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a lifting machine for construction, includes support body (1) and fixed mounting in motor (2) of support body (1) bottom, the fixed cover of output of motor (2) has connect wind-up pulley (3), just the surface of wind-up pulley (3) has around having haulage rope (4), its characterized in that: a sliding rod (8) is slidably mounted inside the frame body (1), a supporting plate (6) is mounted at the front end of the frame body (1) in a fit manner, a connecting block (7) is fixedly mounted at the back of the supporting plate (6), the connecting block (7) is rotatably sleeved on the outer side of the sliding rod (8), one end, far away from the winding wheel (3), of the traction rope (4) is fixedly embedded at the top of the supporting plate (6), a guide rod (5) is fixedly mounted at one side, far away from the supporting plate (6), of the top of the frame body (1), and the traction rope (4) is sleeved on the outer side of the guide rod (5);

the buckling mechanism (11) is arranged on the inner side of the frame body (1), and the upper end of the buckling mechanism (11) is also provided with a transmission mechanism (14);

the toggle mechanism (13) can trigger the transmission mechanism (14) reversely in the overturning process of the supporting plate (6), and the toggle mechanism (13) is arranged between the sliding rod (8) and the supporting plate (6).

2. The hoist for building construction of claim 1, characterized in that: buckling mechanism (11) including slide inlay in support body (1) inside two sets of clamp arm (26), and two sets of clamp arm (26) are the staggered distribution, and are two sets of install gear three (24) between clamp arm (26), just gear three (24) through the spliced pole one with layer board (6) are for rotating the connection, and are two sets of the equal fixed mounting in a side edge that clamp arm (26) is opposite has a plurality of tooth, just the tooth with gear three (24) swing joint, distribute in one of top gear two (23) are installed to the upper end of clamp arm (26), just gear two (23) rotate through spliced pole two install in the inside of layer board (6), drive belt (25) are installed in the transmission between spliced pole one and the spliced pole two.

3. The hoist for building construction as claimed in claim 2, characterized in that: the transmission mechanism (14) comprises a fixing column (20) fixedly embedded in the supporting plate (6), the fixing column (20) is located above the second gear (23), a first gear (19) is concentrically installed on the outer side of the fixing column (20), the first gear (19) is in sliding connection with the supporting plate (6), a coil spring (21) is fixedly installed between the fixing column (20) and the first gear (19), the first gear (19) is movably meshed with the second gear (23), and a trigger assembly (12) is installed on the outer side of the first gear (19).

4. The hoist for building construction as claimed in claim 3, characterized in that: trigger subassembly (12) including fixed mounting in fixed block seat (29) of gear (19) side, just the inside slidable mounting of fixed block seat (29) has sliding block (30), keep away from sliding block (30) the one end fixed mounting of gear (19) has two (33) springs, sliding block (30) are kept away from fixed block seat (29) one end is passed through the torsional spring and is installed cardboard (32), gear (19) are close to the one end fixed mounting of support body (1) has ratchet (22), just cardboard (32) with ratchet (22) swing joint, the rear end fixed mounting of sliding block (30) has stopper (31), just stopper (31) with cardboard (32) swing joint, the preceding terminal surface of stopper (31) with the inner wall of layer board (6) slides and laminates, chute (34) have been seted up to the inside of stopper (31), the front end of layer board (6) slides and has inlayed oblique bottom push block (35), oblique bottom push block (35) are close to one end of stopper (31) is the inclined plane, and with chute (34) slide and laminate.

5. The hoist for building construction of claim 4, characterized in that: toggle mechanism (13) include through the spacing slip inlay in sliding toothed plate (18) at layer board (6) back, the outer fixed surface of slide bar (8) installs tooth piece (16), just tooth piece (16) with sliding toothed plate (18) swing joint, there is slide bar (27) inside of layer board (6) through a fixed mounting of frame piece, just sliding sleeve (17) have been cup jointed in the outer surface slip of slide bar (27), install spring (28) between the bottom of sliding sleeve (17) and the frame piece, just spring (28) cup joint in the outside of slide bar (27), the front end slip of sliding toothed plate (18) inlay in the inboard of sliding sleeve (17), sliding sleeve (17) with install between gear (19) and bulldoze subassembly (15).

6. The hoist for building construction as claimed in claim 5, characterized in that: bulldoze subassembly (15) including slide inlay in a plurality of slip tooth (36) inside sliding sleeve (17), the flank of tooth of slip tooth (36) is close to gear (19), slip tooth (36) are kept away from the articulated arm (37) of pushing away of the one end of gear (19), a plurality of push away the articulated connecting plate (38) of installing jointly in the arm (37) outside, distribute in one of the lower extreme push away the lower terminal surface laminating of arm (37) and install and support piece (40), just support piece (40) with fixed mounting has spring three (39) between sliding sleeve (17).

7. The hoist for building construction of claim 6, characterized in that: the stiffness of the third spring (39) is less than the stiffness of the first spring (28).

8. The hoist for building construction of claim 1, characterized in that: rack (9) that a plurality of is the circumference and distributes are installed in the outside of connecting block (7), just the upper end fixed mounting of support body (1) has spur-tooth plate (10), rack (9) with spur-tooth plate (10) movable meshing, first rack (9) and last contained angle between rack (9) is ninety degrees, just the quantity of rack (9) with the number of teeth of spur-tooth plate (10) is unanimous.

9. The hoist for building construction as claimed in claim 2, characterized in that: rubber pads are fixedly arranged at the clamping short plates of the two groups of clamping arms (26), and the two groups of rubber pads are distributed in opposite directions.