CN211313425U - Jack for mounting assembly type building component - Google Patents

Abstract

The utility model discloses a jack for assembly type building element installation, including the rotatory gear pole, the toothed disc of establishing in the casing, gear shaft, promotion layer board and spacing track, drive rotatory gear pole through handheld electric drill and rotate, pass through gear engagement with power and transmit for the toothed disc, the toothed disc drives gear shaft and together rotates, gear shaft through with promote the gear teeth engagement that sets up on the backplate side of layer board, drive the promotion layer board upper part of the body, and then promote the wall body on the layer board. The utility model uses the hand-held electric drill at the construction site as a power source, and power transmission is carried out through a transmission system meshed with the gear, so as to realize lifting and leveling of the wall body, and the utilization rate of tools is improved by using site tools; the movable type lifting device has the advantages of simple structure, stability, reliability, convenience in operation and convenience in moving and transporting, and can effectively reduce labor intensity and improve construction efficiency.

Description

Jack for mounting assembly type building component

Technical Field

The utility model relates to an assembly type structure installation technical field, concretely relates to jack for assembly type structure component installation.

Background

With the technical development, more and more construction projects are adopted for assembly type building components, and in the assembly type building installation and construction process, the building components need to be accurately leveled after being in place to ensure the accurate positions of the building components. In the existing construction method, tools such as a crow bar, a hand crank adjusting jack, a hydraulic jack and the like are generally adopted to lift and level the building component. When the crow bar is used for lifting the component, the crow bar easily damages the component, so that the edge and the corner of the component are damaged, and the precision is not easy to control and is very inconvenient. The jack needs large torque when being adjusted by a hand crank, otherwise, the component cannot be lifted, the labor intensity is high, the jack is easy to be unstable, and the safety problem exists. The hydraulic jack is too large in equipment, inconvenient to move, not suitable for leveling components needing frequent position replacement and low in construction efficiency. The utility model provides a jack for assembly type building element installation overcomes above-mentioned defect.

SUMMERY OF THE UTILITY MODEL

The utility model provides a jack for assembly type building element installation sets up and to dismantle the nut and match with the handheld electric drill on-the-spot, carries out the leveling of wall body through handheld electric drill cooperation jack, has convenient to use, low in labor strength and the high advantage of efficiency of construction.

The utility model provides a technical scheme that above-mentioned technical problem adopted is:

a jack for mounting an assembly type building component comprises a rotary gear rod, a gear disc, a gear rotating shaft, a lifting support plate, a track and a shell;

the rotary gear rod is vertically arranged on the top plate of the shell, the upper part of the rotary gear rod is exposed out of the top of the shell, the top end of the rotary gear rod is provided with a screw cap, the lower part of the rotary gear rod is positioned in the shell, and the bottom end of the rotary gear rod is provided with bevel teeth and is meshed with the gear disc; the gear disc is arranged in the shell through a gear rotating shaft, annular bevel teeth meshed with the bevel teeth at the bottom end of the rotary gear rod are arranged on the surface of the gear disc, the gear rotating shaft is arranged on the center of the gear disc, two ends of the gear rotating shaft are connected to the front plate surface and the rear plate surface of the shell, and gear teeth are arranged in the middle of the gear rotating shaft; the lifting support plate is vertically arranged and comprises a back plate, side plates and a support plate, wherein the back plate is arranged in the shell, gear teeth meshed with the gear rotating shaft are arranged on the outer side edge of the back plate, the side plates are arranged perpendicular to the outer side surface of the back plate and are divided into two parts, and the support plate is arranged at the bottoms of the two side plates and is positioned outside the shell; the track is established in the casing, and two totally, one is located the backplate back, with the backplate contact, and another is located between two blocks of curb plates, all establishes in the casing.

Furthermore, two parallel through grooves are formed in a front side plate of the shell, the side plate is located in the through grooves, the front side edge of the side plate extends out of the shell, and the supporting plate is horizontally arranged and located at the lower end of the extending portion of the side plate.

Furthermore, the track comprises a supporting track arranged on the back of the back plate and a limiting track arranged between the side plates;

the supporting track comprises a connecting plate and a supporting plate, the connecting plate is vertically arranged on the inner wall of the shell back plate, the supporting plate is a vertically arranged U-shaped plate, the back surface of the supporting plate is fixed on the outer side edge of the connecting plate, limiting bearings are arranged on the outer side edge of the supporting plate at intervals, and the limiting bearings are in contact with the back surface of the back plate;

the limiting track comprises a connecting plate and limiting plates, the connecting plate is arranged perpendicular to the inner wall of the front panel of the shell, the limiting plates are fixed on the outer side edges of the connecting plate, limiting bearings are arranged on the two side edges of each limiting plate at intervals, and the limiting bearings are respectively contacted with the inner side surfaces of the side plates; the back of the limiting plate is provided with two limiting supporting plates, and limiting bearings are arranged on the outer sides of the two limiting supporting plates at intervals;

the back plate is positioned between the supporting plate and the limiting supporting plate and is in contact with a limiting bearing arranged on the back plate.

Further, the rotary gear rod is fixed on the housing through a bearing, and the bearing is arranged on a top plate of the housing.

Furthermore, the nut is detachably connected to the top end of the rotary gear rod; the rotary gear rod is driven by a handheld electric drill, and the nut is matched with the handheld electric drill.

The anti-backing device comprises an anti-backing toothed plate, an anti-backing supporting plate, a compression spring and a handle, wherein the front end of the anti-backing toothed plate is positioned above the gear rotating shaft, and gear teeth meshed with the gear teeth of the gear rotating shaft are arranged on the bottom surface of the anti-backing toothed plate; the middle part of the anti-retreat toothed plate is provided with a rotating shaft and is fixed on the anti-retreat supporting plate through a bearing, the rear end of the anti-retreat toothed plate is connected with the anti-retreat supporting plate through a compression spring, and the compression spring is in a compressed state; the handle comprises a handle rod and a cambered plate, wherein the cambered plate is arranged at the bottom of the rod and is positioned on the side surface of the anti-backing toothed plate.

Further, rotatory gear pole middle part is equipped with solid fixed ring, gu fixed ring establishes on the inner wall of casing backplate, the interval sets up from top to bottom.

Furthermore, the bottom surface of the supporting plate is provided with two reinforcing plates which are vertically arranged trapezoidal plates and are positioned in the through grooves in the shell.

Furthermore, a scale rod is arranged on the rear side of the lifting support plate, the scale rod is an L-shaped rod which is horizontally arranged, the outer end of the scale rod is exposed out of the rear side of the shell, a vertical through groove for the scale rod to move up and down is formed in the rear side of the shell, and scale marks are arranged on one side of the through groove.

The utility model discloses beneficial effect as follows:

the handheld electric drill on a construction site is used as a power source, power transmission is carried out through a transmission system meshed with gears, lifting and leveling of a wall are achieved, and the utilization rate of tools is improved by using site tools;

the track is arranged to support and limit the lifting support plate, so that the position of the lifting support plate is accurate and stable, and the stability and the height accuracy of the wall body in the lifting process are ensured;

bearings are arranged on the track at intervals, so that the lifting support plate is uniformly supported, the lifting support plate is convenient to move, and the uniform lifting and moving efficiency of the lifting support plate are ensured;

the anti-back device is arranged to ensure that the lifting support plate keeps stable height after being lifted, so that the wall body is further fixed, the stability of the wall body is ensured, and the next construction is facilitated;

the utility model discloses simple structure, reliable and stable have convenient operation, remove the convenient advantage of transportation, can effectively reduce intensity of labour, promote the efficiency of construction.

Drawings

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

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a schematic view of the transmission structure of the present invention;

fig. 4 is a schematic view of the lifting support plate of the present invention in a fixed state;

fig. 5 is a schematic view of the track structure of the present invention;

fig. 6 is a schematic view of the lifting pallet structure of the present invention;

FIG. 7 is a schematic view of the connection of the anti-back device of the present invention;

fig. 8 is a schematic view of the usage state of the present invention.

Reference numerals: 1-rotating gear rod, 11-nut, 2-gear disc, 3-gear rotating shaft, 4-lifting supporting plate, 41-back plate, 42-side plate, 43-supporting plate, 44-reinforcing plate, 5-rail, 51-supporting rail, 511-supporting plate, 512-limiting bearing, 52-limiting rail, 521-limiting plate, 522-limiting supporting plate, 6-shell, 7-anti-back device, 71-anti-back tooth plate, 72-anti-back supporting plate, 73-compression spring and 74-handle.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments, of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

As shown in fig. 1, 2, 3, 4 and 6, a jack for mounting a prefabricated building component comprises a rotary gear rod 1, a gear disc 2, a gear rotating shaft 3, a lifting support plate 4, a track 5 and a shell 6;

the rotary gear rod 1 is vertically arranged on a top plate of the shell 6, the upper part of the rotary gear rod is exposed out of the top of the shell 6, the top end of the rotary gear rod is provided with a screw cap 11, the lower part of the rotary gear rod is positioned in the shell 6, and the bottom end of the rotary gear rod is provided with bevel teeth and is meshed with the gear disc 2; the gear disc 2 is arranged in the shell 6 through a gear rotating shaft 3, annular bevel teeth meshed with the bevel teeth at the bottom end of the rotary gear rod 1 are arranged on the surface of the gear disc 2, the gear rotating shaft 3 is arranged on the center of the gear disc 2, two ends of the gear rotating shaft are connected to the front plate surface and the rear plate surface of the shell 6, and gear teeth are arranged in the middle of the gear rotating shaft; the lifting support plate 4 is vertically arranged and comprises a back plate 41, side plates 42 and a support plate 43, the back plate 41 is arranged in the shell 6, gear teeth meshed with the gear rotating shaft 3 are arranged on the outer side edge of the back plate, the side plates 42 are perpendicular to the outer side surface of the back plate 41 and are arranged in two blocks, and the support plate 43 is arranged at the bottoms of the two side plates 42 and is positioned outside the shell 6; the rails 5 are arranged in the shell 6, and are two in total, one is positioned on the back surface of the back plate 41 and is in contact with the back plate 41, and the other is positioned between the two side plates 42 and is arranged in the shell 6.

The working principle of the utility model is as follows: drive rotatory gear pole 1 through handheld electric drill and rotate, pass through gear engagement with power and transmit for toothed disc 2, toothed disc 2 drives gear shaft 3 and rotates together, gear shaft 3 through with promote the wheel teeth meshing that sets up on the 41 sides of backplate of layer board 4, drive and promote the layer board 4 upper part of the body, and then promote the wall body on the layer board 43.

As shown in fig. 1 and 2, two parallel through grooves are further formed in a front side plate of the housing 6, the side plate 42 is located in the through groove, a front side edge of the side plate extends out of the housing 6 by 10-15mm, and the supporting plate 43 is horizontally arranged and located at a lower end of a protruding portion of the side plate 42. The front side edge of the side plate 42 extends out of the shell 6, so that the wall body is ensured to be isolated from the shell 6, the wall body is attached and supported, and the stability of the wall body during lifting is ensured.

As shown in fig. 4 and 5, further, the rail 5 includes a supporting rail 51 disposed on the back surface of the back plate 41 and a limiting rail 52 disposed between the side plates 42;

the supporting track 51 comprises a connecting plate and a supporting plate 511, the connecting plate is vertically arranged on the inner wall of the back plate of the shell 6, the supporting plate 511 is a vertically arranged U-shaped plate, the back surface of the supporting plate 511 is fixed on the outer side edge of the connecting plate, limiting bearings 512 are arranged on the outer side edge of the supporting plate at intervals, and the limiting bearings 512 are in contact with the back surface of the back plate 41;

the limiting rail 52 comprises a connecting plate and a limiting plate 521, the connecting plate is arranged on the inner wall of the front panel perpendicular to the shell 6, the limiting plate 521 is fixed on the outer side edge of the connecting plate, limiting bearings 512 are arranged on two side edges of the limiting plate 521 at intervals, and the limiting bearings 512 are respectively contacted with the inner side surfaces of the side plates 42; the back of the limiting plate 521 is provided with two limiting supporting plates 522, and the outer side of each limiting supporting plate 522 is provided with a limiting bearing 512 at intervals;

the back plate 41 is located between the supporting plate 511 and the limit supporting plate 522, and contacts with the limit bearing 512 provided thereon.

Preferably, the limit bearings 512 on the support plate 511, the limit plate 521 and the limit support plate 522 are all arranged at an interval from top to bottom, the limit bearings 512 are arranged on the side surfaces of the support plate 511, the limit plate 521 and the limit support plate 522, and the bearing surfaces are in contact with the surfaces of the back plate 41 and the side plate 42.

The supporting plate 511 and the limiting supporting plate 522 are respectively located on two sides of the back plate 41 to support the back plate 41, so that the lifting supporting plate 4 is kept stable when the wall body is lifted, the vertical state of the back plate 41 is ensured, and the back plate 41 is aligned with the gear rotating shaft 3. The limiting plate 521 is located between the two side plates 42, and limits the position of the lifting support plate 4 in the left-right direction. The limiting bearing 512 is arranged to enable the movement to be more convenient and fast, and excessive power loss is avoided.

Further, the rotary gear lever 1 is fixed to the housing 6 by a bearing provided on a ceiling of the housing 6.

Further, the nut 11 is detachably connected to the top end of the rotary gear rod 1; the rotary gear rod 1 is driven by a handheld electric drill, and the screw cap 11 is matched with the handheld electric drill.

Further, nut 11 bottom is equipped with the hexagonal recess, 1 top of rotatory gear pole is equipped with corresponding arch, nut 11 is connected with rotatory gear pole 1 through the screw on its top. When in use, the screw cap 11 with different specifications and sizes is replaced by disassembling the screw, so that the screw cap has better applicability.

As shown in fig. 7, further, the anti-back device 7 is further included, the anti-back device 7 includes an anti-back tooth plate 71, an anti-back support plate 72, a compression spring 73 and a handle 74, the front end of the anti-back tooth plate 71 is located above the gear rotating shaft 3, and gear teeth meshed with the gear teeth of the gear rotating shaft 3 are arranged on the bottom surface of the anti-back tooth plate 71; the middle part of the anti-back tooth plate 71 is provided with a rotating shaft and is fixed on the anti-back support plate 72 through a bearing, the rear end of the anti-back tooth plate is connected with the anti-back support plate 72 through a compression spring 73, and the compression spring 73 is in a compression state; the handle 74 comprises a handle rod and a cambered plate, wherein the cambered plate is arranged at the bottom of the rod and is positioned on the side surface of the anti-back tooth plate 71.

Preferably, the tooth of a cogwheel arc setting of preventing moving back pinion rack 71 bottom to it is the same with the radian of gear shaft 3, guarantees to prevent moving back the effect.

Further, the handle 74 is fixed to the top of the housing 6, and a switch mark is provided on the top, and is operated by rotating the handle to an on or off position. When the handle 74 is in the open position, the anti-back tooth plate 71 is separated from the gear rotating shaft 3, and when the handle is in the closed position, the anti-back tooth plate 71 clamps the gear rotating shaft 3. The action process is as follows: twist the handle to open the position, the wrench movement in-process, the cambered plate rotates along with the handle pole, the cambered plate rotates and is contacted with anti-backing tooth board 71 by thin wall position rotation to thick wall position, progressively oppresses anti-backing tooth board 71 rear end downstream to further make compression spring 73 compress, make the teeth of a cogwheel of the front end of anti-backing tooth board 71 break away from with the teeth of a cogwheel of gear revolve 3. When the gear is in the off position, the compression spring 73 is restored to the state, and the gear teeth at the front end of the anti-backing tooth plate 71 and the gear teeth of the gear rotating shaft 3 are clamped.

Set up and prevent moving back device 7 and guarantee that whole transmission system is in motion dress attitude or quiescent condition, guarantee that the wall body adjustment can be in stable quiescent condition after targetting in place, realize the switch through the wrench movement, convenient operation to set up the sign, avoid the maloperation, guarantee safety.

Further, the middle part of the rotary gear rod 1 is provided with a fixing ring, the fixing ring is arranged on the inner wall of the back plate of the shell 6 at intervals from top to bottom. Set up solid fixed ring and fix rotatory gear pole 1, guarantee that rotatory gear pole 1 motion in-process position is stable, avoid its dislocation to ensure the teeth of a cogwheel and the toothed disc 2 of bottom and keep the engaged state.

As shown in fig. 6, a reinforcing plate 44 is further arranged on the bottom surface of the supporting plate 43, and the reinforcing plate 44 is a trapezoidal plate vertically arranged and located in the through groove of the housing 6. Set up reinforcing plate 44 and strengthen layer board 43 structural strength and stability, guarantee construction safety.

Furthermore, a scale rod is arranged on the rear side of the lifting support plate 4, the scale rod is an L-shaped rod which is horizontally arranged, the outer end of the scale rod is exposed out of the rear side of the shell 6, a vertical through groove for the scale rod to move up and down is formed in the rear side of the shell 6, and scale marks are arranged on one side of the through groove. Wall body one side can't directly observe to adopt the construction of handheld electric drill, can't effectively guarantee the lifting capacity, through the cooperation of scale pole and scale, can direct control promote the height, guarantee to promote the effect.

Further, the housing 6 includes front and rear half shells, a top cover, and a base, and the housing 6 is formed by screw-coupling. Preferably, 6 materials of casing are high strength aluminum alloy, guarantee structural strength and stability, reduce the dead weight again, are convenient for remove. Preferably, the center of the base is positioned below the lifting support plate 4, so that the stability and the construction safety of the jack during the lifting of the wall body are ensured.

As shown in fig. 8, a method of using a jack for the installation of a fabricated building element, comprising the steps of:

s1, placing and fixing: marking the installation positions of the wall, marking the placing positions of the two jacks, and then placing the two jacks at the marked positions and fixing;

s2, height adjustment: presetting the height of a supporting plate 43 of the jack to a certain height, and fixing by using an anti-retreat device 7;

s3, hoisting and fixing the wall: hoisting the wall body, placing the bottom of the wall body on the supporting plate 43, and fixing the wall body and the building by using a fixing tool;

s4, wall adjustment: the anti-back device 7 is located at an open position, a matched handheld electric drill is used for driving the rotary gear rod 1 to rotate, the lifting support plate 4 is lifted to a specified height, the lifting heights of the two jacks are guaranteed to be consistent, and then the anti-back device 7 is used for fixing;

s5, wall installation: after the wall is leveled, the wall is fixed by using a fixing tool, then the height of the lifting support plate 4 is reduced, and the wall is installed after the jack is removed.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

Claims (9)

1. A jack for mounting an assembly type building component is characterized by comprising a rotary gear rod (1), a gear disc (2), a gear rotating shaft (3), a lifting supporting plate (4), a track (5) and a shell (6);

the rotary gear rod (1) is vertically arranged on a top plate of the shell (6), the upper part of the rotary gear rod is exposed out of the top of the shell (6), the top end of the rotary gear rod is provided with a screw cap (11), the lower part of the rotary gear rod is positioned in the shell (6), and the bottom end of the rotary gear rod is provided with bevel teeth and is meshed with the gear disc (2); the gear disc (2) is arranged in the shell (6) through a gear rotating shaft (3), annular bevel teeth meshed with the bevel teeth at the bottom end of the rotary gear rod (1) are arranged on the surface of the gear disc (2), the gear rotating shaft (3) is arranged on the center of the circle of the gear disc (2), two ends of the gear rotating shaft are connected to the front plate surface and the rear plate surface of the shell (6), and gear teeth are arranged in the middle of the gear rotating shaft; the lifting support plate (4) is vertically arranged and comprises a back plate (41), side plates (42) and a support plate (43), the back plate (41) is arranged in the shell (6), gear teeth meshed with the gear rotating shaft (3) are arranged on the outer side edge of the back plate, the side plates (42) are arranged perpendicular to the outer side surface of the back plate (41) and are divided into two parts, and the support plate (43) is arranged at the bottom of the two side plates (42) and is positioned outside the shell (6); the rails (5) are arranged in the shell (6) in two blocks, one block is positioned on the back surface of the back plate (41) and is in contact with the back plate (41), and the other block is positioned between the two side plates (42) and is arranged in the shell (6).

2. A jack for the installation of a fabricated building element according to claim 1, wherein: the shell is characterized in that two parallel through grooves are formed in a front side plate of the shell (6), the side plate (42) is located in the through grooves, the front side edge of the side plate extends out of the shell (6), and the supporting plate (43) is horizontally arranged and located at the lower end of the extending portion of the side plate (42).

3. A jack for the installation of a fabricated building element according to claim 1, wherein: the track (5) comprises a supporting track (51) arranged on the back surface of the back plate (41) and a limiting track (52) arranged between the side plates (42);

the supporting rail (51) comprises a connecting plate and a supporting plate (511), the connecting plate is vertically arranged on the inner wall of the back plate of the shell (6), the supporting plate (511) is a vertically arranged U-shaped plate, the back surface of the supporting plate is fixed on the outer side edge of the connecting plate, limiting bearings (512) are arranged on the outer side edge of the supporting plate at intervals, and the limiting bearings (512) are in contact with the back surface of the back plate (41);

the limiting rail (52) comprises a connecting plate and limiting plates (521), the connecting plate is arranged on the inner wall of the front panel perpendicular to the shell (6), the limiting plates (521) are fixed on the outer side edges of the connecting plate, limiting bearings (512) are arranged on the two side edges of the limiting plates (521) at intervals, and the limiting bearings (512) are respectively contacted with the inner side surfaces of the side plates (42); the back of the limiting plate (521) is provided with two limiting supporting plates (522), and the outer sides of the two limiting supporting plates (522) are provided with limiting bearings (512) at intervals;

the back plate (41) is positioned between the supporting plate (511) and the limiting supporting plate (522) and is contacted with a limiting bearing (512) arranged on the back plate.

4. A jack for the installation of a fabricated building element according to claim 1, wherein: the rotary gear rod (1) is fixed on the shell (6) through a bearing, and the bearing is arranged on a top plate of the shell (6).

5. A jack for the installation of a fabricated building element according to claim 1, wherein: the nut (11) is detachably connected to the top end of the rotary gear rod (1); the rotary gear rod (1) is driven by a handheld electric drill, and the screw cap (11) is matched with the handheld electric drill.

6. A jack for the installation of a fabricated building element according to claim 1, wherein: the anti-moving back device (7) comprises an anti-moving back toothed plate (71), an anti-moving back supporting plate (72), a compression spring (73) and a handle (74), wherein the front end of the anti-moving back toothed plate (71) is positioned above the gear rotating shaft (3), and gear teeth meshed with the gear teeth of the gear rotating shaft (3) are arranged on the bottom surface of the anti-moving back toothed plate (7); the middle part of the anti-retreat tooth plate (71) is provided with a rotating shaft and is fixed on the anti-retreat supporting plate (72) through a bearing, the rear end of the anti-retreat tooth plate is connected with the anti-retreat supporting plate (72) through a compression spring (73), and the compression spring (73) is in a compression state; the handle (74) comprises a handle rod and a cambered plate, wherein the cambered plate is arranged at the bottom of the rod and is positioned on the side surface of the anti-back toothed plate (71).

7. A jack for the installation of a fabricated building element according to claim 4, wherein: the middle part of the rotary gear rod (1) is provided with a fixing ring, the fixing ring is arranged on the inner wall of the back plate of the shell (6) at an upper interval and a lower interval.

8. A jack for the installation of a fabricated building element according to claim 1, wherein: the bottom surface of the supporting plate (43) is provided with two reinforcing plates (44), wherein the reinforcing plates (44) are trapezoidal plates which are vertically arranged and are positioned in the through grooves on the shell (6).

9. A jack for the installation of a fabricated building element according to claim 1, wherein: the rear side of the lifting supporting plate (4) is provided with a scale rod, the scale rod is an L-shaped rod which is horizontally arranged, the outer end of the scale rod is exposed out of the rear side of the shell (6), the rear side of the shell (6) is provided with a vertical through groove for the scale rod to move up and down, and one side of the through groove is provided with scale marks.

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