CN215592366U - Indoor hoisting equipment - Google Patents

Abstract

An indoor lifting device comprising: the lifting device comprises a frame, a lifting device, a suspension, a winch and a hanger, wherein the frame comprises a main frame and an auxiliary frame, the main frame is provided with two wheels which are coaxially arranged, and the auxiliary frame is hinged on the main frame; the jacking device is arranged on the auxiliary frame; the suspension is arranged on the jacking device, and pulleys are arranged at the middle part and one end of the suspension; the winch is arranged on the auxiliary frame; the lifting frame is hung on the suspension frame through a steel wire rope and is connected with the winch, the pulleys support the steel wire rope, and when the jacking device lifts and supports the indoor top surface, the winch pulls the lifting frame through the steel wire rope to lift the components hung on the lifting frame. In the embodiment of the utility model, the jacking device is jacked on the roof to form firm support, and the suspension is lifted to the top and kept stable, so that the material is hoisted by the hoisting frame pulled by the steel wire rope without erecting a scaffold or manually carrying the material at a high position, time and labor are saved, personnel are safer, holes are not required to be drilled on the structure, and the stable structure is ensured.

Description

Indoor hoisting equipment

Technical Field

The utility model belongs to the technical field of building construction equipment, and particularly relates to indoor hoisting equipment.

Background

In the construction site at the present stage, large-mass and large-size components such as metal pipelines and the like are hoisted and installed in narrow limited spaces such as equipment rooms, corridors and the like, and conventional hoisting equipment occupies a large space and cannot enter the narrow space for use. The method mainly adopts two modes on site, wherein the first mode is that the components are carried by manpower, a scaffold with higher height needs to be erected, multi-stage steps are erected on the scaffold, the components are carried and lifted layer by manpower, and when the length of the components is longer, the components need to be cut into small sections and then carried; the second way is to install pulleys on the indoor top plate or beam and hoist the parts by means of manpower or mechanical traction through steel wire ropes.

These two kinds of modes all have some inadequacies, set up the scaffold not only extravagant artifical, need use the material of a large amount of scaffolds moreover to constructor carries the part on the scaffold, also has higher safety risk, and the installation pulley then need punch on roof or roof beam, to the knot structure and construct the destruction, and each part top all needs the installation pulley moreover, and work efficiency is lower, and also has had the potential safety hazard of increaseing the construction in the operation of part below.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the related art, the utility model provides indoor hoisting equipment to solve the problems of labor and force waste, poor safety and structural damage in the conventional indoor hoisting mode.

The utility model provides an indoor hoisting device, comprising:

the frame comprises a main frame and an auxiliary frame, the main frame is provided with two wheels which are coaxially arranged, and the auxiliary frame is hinged on the main frame;

the jacking device is arranged on the auxiliary frame;

the suspension is arranged on the jacking device, and pulleys are arranged at the middle part and one end of the suspension;

a winch mounted on the subframe;

the lifting frame is hung on the suspension frame through a steel wire rope and is connected with the winch, the pulleys support the steel wire rope, and when the jacking device lifts and supports the indoor top surface, the winch pulls the lifting frame through the steel wire rope to lift the components hung on the lifting frame.

This technical scheme is through removing to required position, under the support of jacking device, hoist engine drive gallows hoists the part, and equipment removes conveniently, need not build the scaffold frame, does not need the workman to carry in the eminence, labour saving and time saving, and the security is strong, can not construct the structure and destroy.

In some of these embodiments, the jacking device comprises:

the bracket is arranged on the frame and is provided with a guide supporting pipe which is vertically arranged;

the jacking hydraulic cylinder is arranged on the frame, and a piston rod of the jacking hydraulic cylinder extends into the guide supporting pipe;

and the bottom of the jacking rod is slidably assembled in the guide supporting pipe and falls on the piston rod, and the suspension is arranged on the jacking rod.

According to the technical scheme, the jacking rod is supported through the guide supporting tube, so that the jacking rod is stable in jacking.

In some embodiments, the middle part of the suspension is provided with a vertically arranged sleeve, and the sleeve is sleeved on the lifting rod and falls on a step arranged on the lifting rod. According to the technical scheme, the suspension frame is rotated through the sleeving, and the angle position of the suspension frame is adjusted, so that the hoisting operation is more flexible.

In some of these embodiments, a support member is mounted to one end of the hanger bracket, the support member having a roller that presses against the ceiling of the room when the lift pin is pressed against the ceiling of the room. This technical scheme makes the roof can support the suspension through support piece, stability when improving hoist and mount, is convenient for rotate simultaneously.

In some of these embodiments, a support bearing is mounted on the step and the sleeve lands on the support bearing. This technical scheme supports through the support bearing, improves the suspension and rotates the smoothness nature.

In some of these embodiments, the support further comprises:

the adjusting pipe is vertically arranged and arranged on the suspension;

the support rod is assembled in the adjusting pipe in a sliding mode, and the roller is arranged on the support rod;

and the fastening bolt is in threaded connection with the adjusting pipe, and when the fastening bolt is screwed, the supporting rod is pressed and fixed by the fastening bolt.

This technical scheme realizes the regulation of support piece support height, improves equipment's use flexibility.

In some of these embodiments, the top end of the lifting rod is provided with a top plate, and when the lifting device lifts and supports the indoor top surface, the top plate presses on the indoor top surface. This technical scheme increases the support area through the roof, improves the stability of suspension.

In some of these embodiments, the frame comprises:

the main frame is provided with two wheels which are coaxially arranged;

the auxiliary frame is hinged to one end of the main frame, and the jacking device and the winch are both arranged on the auxiliary frame.

This technical scheme makes the subframe conveniently lift up and remove, improves the removal flexibility of equipment.

In some of these embodiments, pulleys are mounted in the middle and at the ends of the suspension, both pulleys supporting the wire rope. According to the technical scheme, the smoothness of movement of the steel wire rope is improved through the pulleys.

In some of these embodiments, the hanger comprises:

the hanging beam is connected with the steel wire rope;

the two clamping pieces are connected with the hanging beam through hanging cables;

wherein, the hanging beam interval is provided with a plurality of constant head tanks that are used for holding the suspension cable.

The technical scheme adjusts the distance between the clamping pieces and is suitable for hoisting parts with different lengths.

In some of these embodiments, the clamp comprises:

the two clamping rods are hinged with each other at the middle parts, the tops of the two clamping rods are connected through a connecting rope, and the lifting cable is connected with the connecting rope;

the two supporting plates are respectively arranged at the bottoms of the corresponding clamping rods and extend inwards.

The clamping piece of the technical scheme can be automatically held tightly by pressing down the component and can be well supported, and the hoisting stability is improved.

In some of these embodiments, the pallets are each fitted with a non-slip mat. This technical scheme improves the stability of part in the holder through the slipmat, prevents that the part from droing.

Based on the technical scheme, the jacking device is jacked on the roof to form firm support, the suspension is lifted to the top and kept stable, so that materials are hoisted by the lifting frame pulled by the steel wire rope without erecting a scaffold or manually carrying the materials at a high position, time and labor are saved, personnel are safer, holes are not required to be formed in the structure, the structure is guaranteed to be stable, the jacking device stops jacking, equipment can move indoors, after the equipment moves to a new position, the jacking device is fixed on the jacking, the equipment is hoisted, the position of hoisting is convenient to adjust, the use flexibility is higher, the jacking device and the winch are both positioned on the auxiliary frame capable of contacting the ground to obtain firm support on the ground, the trolley formed by the main frame and the wheels can lift the auxiliary frame off the ground, the frame is convenient to move and operate, and the problems that the current indoor hoisting mode is labor-consuming, labor is wasted, and the auxiliary frame is difficult to lift, The safety is poor, and the problem of structural damage exists.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the utility model without limiting the utility model. In the drawings:

FIG. 1 is a schematic structural view of an indoor lifting device according to the present invention;

FIG. 2 is a schematic structural view of a cantilever portion of the indoor lifting device of the present invention;

fig. 3 is a schematic structural view of a hanger part in the indoor lifting device of the present invention.

In the figure:

1. a frame; 11. a main frame; 12. a sub-frame; 13. a wheel;

2. a jacking device; 21. a support; 22. a jacking hydraulic cylinder; 23. a jacking rod; 24. a guide supporting tube; 25. a piston rod; 26. a step; 27. a top plate; 28. a support bearing;

3. a suspension; 31. a sleeve;

4. a winch;

5. a hanger; 51. a hanging beam; 52. a clamping member; 521. a clamping rod; 522. a support plate; 523. connecting ropes; 524. a non-slip mat; 53. hoisting cables; 54. positioning a groove;

6. a wire rope;

7. a support member; 71. a roller; 72. an adjusting tube; 73. a strut; 74. fastening a bolt;

8. a pulley;

Detailed Description

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

In the description of the present invention, it is to be understood that the terms "central," "lateral," "longitudinal," "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 convenience in describing the present invention and for simplicity in 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 therefore not to be considered limiting.

The terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 3, in one exemplary embodiment of the indoor lifting apparatus of the present invention, the indoor lifting apparatus includes a frame 1, a jacking device 2, a suspension 3, a hoist 4, and a hanger 5. The frame 1 can move, and the jacking device 2 and the winch 4 are both arranged on the frame. The suspension 3 is arranged on the jacking device 2, the hanger 5 is hung on the suspension 3 through a steel wire rope 6, and the steel wire rope 6 is connected with the winch 4.

The frame 1 comprises a main frame 11 and a sub-frame 12, the main frame 11 having wheels 13 to facilitate movement of the frame 1. The wheels 13 are arranged coaxially two by two, so that the main frame 11 and the two wheels 13 constitute a two-wheeled cart. The auxiliary frame 12 is hinged at one end of the main frame 11, and the jacking device 2 and the winch 4 are both arranged on the auxiliary frame 12. The sub-frame 12 can be placed on the ground so that the ground supports the jack-up unit 2 upward through the vehicle frame 1. The jacking device 2 is pushed upwards and is propped against the top surface of the roof, so that the roof supports the jacking device 2 downwards, and the jacking device 2 is of a stand column structure fixed indoors. Jacking device 2 upwards pushes out the top when the roof, with suspension 3 lifting to indoor eminence, hoist engine 4 tractive wire rope 6 lifts to indoor eminence with the part of fixing on the gallows 5 to carry out the hoist and mount of part.

Withdraw jacking device 2 downwards, eliminate the roof and to its support, frame 1 can remove at this moment indoor, and after removing to required position, jacking device 2 upwards releases the shore once more, makes the equipment change position carry out the hoist and mount operation.

The sub-frame 12 is installed at the front end of the main frame 11, and the rear end of the main frame 11 is tilted upward when the sub-frame 12 is dropped to the ground. The auxiliary frame can be lifted up by pressing down the rear end of the main frame 11, and the formed double-wheel handcart can travel indoors. After the auxiliary frame 12 is moved to the required position, the auxiliary frame can be placed on the ground, the jacking device 2 upwards supports the roof, the jacking device 2 can be fixed, and the component is hoisted. The auxiliary frame 12 can be lifted up to move the frame 1 indoors, and the frame can be fixed indoors by putting down the auxiliary frame 12 without locking the wheels 13, so that the operation is simple and convenient.

The winch 4 is positioned on the subframe 12, is fixed relative to the jacking device 2, and cannot push and pull the steel wire rope 6 due to the change of the relative position of the winch and the jacking device. Pulleys 8 are mounted in the middle and at the end of the suspension 3, and the two pulleys 8 support the steel wire rope 6. After the steel wire rope 6 is connected with the hanger 5, the steel wire rope extends to the middle part of the suspension bracket 3 from outside to inside along the pulley 8 and then is connected with the winch 4 downwards, so that the steel wire rope 6 is prevented from occupying the space below the suspension bracket 3 to the maximum extent, and the part cannot be blocked by the steel wire rope 6 in the upward hoisting process.

In above-mentioned exemplary embodiment, need not set up the scaffold frame, need not workman's operation in the eminence, only need jacking device 2 to prop the roof, 4 tractive wire rope 6 of hoist engine, can make gallows 5 hoist and mount fixed part, time saving and labor saving, personnel are safer, need not worry the eminence and fall, need not punch at the housing construction, guarantee stable in structure, jacking device 2 can loosen the support, make equipment remove and change hoist and mount position, it is nimble to use, it is convenient to adjust, it can lift up subframe 12 to push down body frame 11, frame removal convenient operation, it takes a lot of work to have solved antechamber internal hoisting mode, the security is relatively poor, there is the problem of structrual failure.

In some embodiments, the jacking device 2 comprises a bracket 21, a jacking hydraulic cylinder 22 and a jacking rod 23. The bracket assembly 21 is arranged on the frame 1 and has a vertically arranged guide support tube 24. The jacking hydraulic cylinder 22 is mounted on the frame 1, and a piston rod 25 thereof is slidably fitted in the guide support pipe 24. The bottom of the lift rod 23 is slidably fitted in the guide support pipe 24 and falls on the piston rod 25, and the suspension 3 is mounted on the lift rod 23.

If the jacking device 2 only has the jacking hydraulic cylinder 22, the piston rod 25 of the jacking hydraulic cylinder 22 is directly pushed upwards to support the roof, the piston rod 25 needs a larger length, the cylinder body of the jacking hydraulic cylinder 22 cannot support the piston rod 25 in a better radial direction, the piston rod 25 is extended too long and is easy to deflect, and the position suspension cannot be supported firmly, so that the position suspension is difficult to stabilize. The inner wall of direction stay tube 24 and the outer wall sliding contact of jacking pole 23 make direction stay tube 24 carry out firm radial support to jacking pole 23, and jacking pole 23 falls on jacking pneumatic cylinder 22, be located certain high position, make need not longer length can support the roof, further guarantee the radial support of direction stay tube 24 to jacking pole 23, under the upwards ejection of jacking pneumatic cylinder 22, jacking pole 23 can be firm bear on the roof top surface, make jacking device 2 fixed firm, suspension 3 can remain stable, hoist and mount can go on safely.

In some embodiments, as shown in fig. 2, the middle of the suspension 3 has a vertically disposed sleeve 31, and the sleeve 31 is sleeved on the lifting rod 23, so that the suspension 3 can rotate around the lifting rod 23, and the hanger 5 suspended on the suspension 3 can move along with the lifting rod to adjust the angular position thereof, so as to move to above the component, and the component can be lifted by directly falling down. In order to keep the suspension 3 stable while rotating, the sleeve 31 is dropped on the step 26 provided on the lift pin 23, and the sleeve 31 is supported by the step 26, thereby maintaining the axial stability of the suspension 3.

In some embodiments, as shown in fig. 2, a support 7 is mounted at one end of the suspension 3, the support 7 having a roller 71. When the lifting rod 23 is pressed against the indoor ceiling, the roller 71 is pressed against the indoor ceiling. The gallows 5 hangs in the one end of suspension 3, and when gallows 5 hoisted the great part of weight, suspension 3 this end received great drop-down, and the roof carries out the reverse support to suspension 3 through the support piece 7 that is located the suspension 3 other end, even do not use the counter weight, also can make suspension 3 receive also can remain stable under the great load, improves the stability and the security of hoist and mount. When the suspension 3 rotates, the roller 71 rolls on the indoor top surface, so that the smoothness of rotation of the suspension 3 is ensured, and meanwhile, the roof supports the suspension 3 reversely. The roller 71 is provided with a locking mechanism which can lock the roller 71 to prevent the roller 71 from rotating, so that the roof can prevent the support 7 from moving through friction force, the suspension 3 is fixed, and the stability in the hoisting process is ensured.

In some embodiments, as shown in fig. 2, the jacking device 2 further comprises a support bearing 28, the support bearing 28 is sleeved on the jacking rod 23 and falls on the step 26, and the step 26 vertically supports the jacking rod 28. The support bearing 28 is a flat bearing, a tapered roller bearing, or the like that can hold and guide a parallel surface, and the sleeve 31 is dropped on the support bearing 28, so that the step 26 supports the sleeve 31 by the support bearing 28, the suspension 3 rotates smoothly, wear between the suspension and the jack-up rod 23 is reduced, and the service life is prolonged.

In some embodiments, as shown in fig. 2, support 7 further comprises an adjustment tube 72, a strut 73, and a fastening bolt 74. The adjusting pipe 72 is vertically disposed and mounted on the suspension 3. The rod 73 is slidably fitted in the adjusting tube 72 so as to be movable up and down along the adjusting tube, and the roller 71 is mounted on the rod 73. The fastening bolt 74 is screwed on the adjusting tube 72, and when the fastening bolt 74 is screwed, the fastening bolt 74 radially extends into the adjusting tube 72 and presses and fixes the support rod 73 on the inner wall of the adjusting tube 72. The support rod 73 can be adjusted by loosening the fastening bolt 74, so that the support rod can move up and down, the height position of the roller 71 is adjusted to adapt to the heights of different roof top surfaces, the roller 71 is kept pressing the roof top surfaces, the roof is maintained to reversely support the suspension frame 3, and the support piece 7 has high adjustment flexibility.

In some embodiments, a top plate 27 is mounted to the top end of the lift pins 23. When the indoor ceiling surface is lifted and supported by the lifting device 2, the ceiling plate 27 is pressed against the indoor ceiling surface. The roof is contacted with the surface of the top plate 27, so that the jacking device 2 is more firmly reversely supported, the jacking device is more stable, and the hoisting operation is safer.

In some embodiments, as shown in fig. 3, the hanger 5 comprises a hanging beam 51 and a clamp 52. A suspension beam 51 is connected to the wire rope 6, and two clamping members 52 are provided, each suspended from the suspension beam 51 by a suspension cable 53. The clamp 52 fixes the member to the hanger 5 by clamping the member, and lifts the member by pulling the hanger 5 by the wire rope 6. The hanging beam 51 interval sets up a plurality of constant head tanks 54, through putting into different constant head tanks 54 with hoist cable 53 to adjust the interval between the holder 52, thereby carry out the centre gripping to the both ends of different length parts and fix, make the part of different length that gallows 5 can fix, and hoist it, improve and adjust the flexibility.

In some embodiments, as shown in FIG. 3, the clamp 52 includes a clamp bar 521 and a blade 522. The clamping bars 521 have two, the two clamping bars 521 cross each other, and the middle portions thereof are hinged to each other. The top parts of the two clamping rods 521 are connected through a connecting rope 523, and the hoist cable 53 is connected to the connecting rope 523. The two support plates 522 are respectively installed at the bottom of the corresponding clamping bar 521 and extend inward.

When the parts are clamped and fixed, the parts are placed between the clamping bars 521 and fall onto the pallet 522. Under the circumstances that clamping lever 521 was pushed down by the part, hoist cable 53 makes the both ends of connecting rope 523 all by drop-down to connecting rope 523's support, thereby bending deformation, the interval reduces between the top of clamping lever 521, and the interval reduces between the bottom of clamping lever 521, thereby carries out the centre gripping to the part, and layer board 522 carries out vertical support to the part simultaneously, thereby fixes the part on gallows 5 through holder 521, and then carries out the hoist and mount operation. The clamping rod 521 clamps and fixes the components under the action of the dead weight of the components, and has a simple structure and easy operation.

In some embodiments, cleats 524 are mounted to pallets 522. When the two clamping rods 521 clamp the component, the component falls on the anti-slip pads 524 on the supporting plate 522, and the component is kept stable by friction force, so that the component is further prevented from falling off, and the hoisting safety is improved.

Through the description of the multiple embodiments of the indoor hoisting equipment, it can be seen that the embodiments of the indoor hoisting equipment at least have one or more of the following advantages:

1. support fixedly through jacking device, need not set up the scaffold frame, need not artifical aerial work, labour saving and time saving, the security is high.

2. The structure is not required to be punched, the structure is not damaged, and the structural strength is maintained.

3. The cantilever can rotate, and the hoist and mount operation is more convenient.

4. The cantilever can be supported in the opposite direction of the roof and can be stable under high loads without counterweights.

5. The clamping piece can be clamped and fixed under the action of the dead weight of the component, and the structure is simple.

6. The distance between the two steel wire ropes on the hanger can be adjusted, so that the distance between the two clamping pieces can be adjusted to adapt to hoisting of parts of different specifications.

Finally, it should be noted that: the embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the utility model or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the utility model as defined by the appended claims.

Claims (10)

1. An indoor hoisting device, comprising:

the frame comprises a main frame and an auxiliary frame, wherein the main frame is provided with two wheels which are coaxially arranged, and the auxiliary frame is hinged on the main frame;

the jacking device is arranged on the auxiliary frame;

the suspension is arranged on the jacking device, and pulleys are arranged at the middle part and one end of the suspension;

a winch mounted on the subframe;

the lifting frame is hung on the suspension frame through a steel wire rope and connected with the winch, the pulleys support the steel wire rope, and when the jacking device lifts and supports the indoor top surface, the winch pulls the lifting frame through the steel wire rope to lift the components hung on the lifting frame.

2. Indoor lifting device according to claim 1, characterized in that the jacking arrangement comprises:

the bracket is arranged on the frame and is provided with a guide supporting pipe which is vertically arranged;

the jacking hydraulic cylinder is arranged on the frame, and a piston rod of the jacking hydraulic cylinder extends into the guide supporting pipe;

and the bottom of the jacking rod is slidably assembled in the guide supporting pipe and falls on the piston rod, and the suspension is arranged on the jacking rod.

3. The indoor hoisting device of claim 2, wherein the suspension has a vertically disposed sleeve in the middle, the sleeve being sleeved on the lifting rod and falling on a step provided on the lifting rod.

4. Indoor lifting device according to claim 3, characterized in that a support is mounted at one end of the suspension, said support having a roller, said roller pressing against the indoor ceiling when the lifting rod is against the indoor ceiling.

5. Indoor lifting device according to claim 3, characterized in that a support bearing is mounted on the step, on which support bearing the sleeve falls.

6. Indoor lifting device according to claim 4, characterized in that the support further comprises:

the adjusting pipe is vertically arranged and arranged on the suspension;

the support rod is assembled in the adjusting pipe in a sliding mode, and the roller is arranged on the support rod;

and the fastening bolt is in threaded connection with the adjusting pipe, and when the fastening bolt is screwed, the supporting rod is pressed and fixed by the fastening bolt.

7. Indoor lifting equipment as claimed in any one of claims 2 to 6 wherein a top plate is mounted on the top end of the lifting rod, and when the lifting device lifts and supports the indoor ceiling surface, the top plate presses on the indoor ceiling surface.

8. Indoor lifting device according to claim 1, characterized in that the lifting frame comprises:

the hanging beam is connected with the steel wire rope;

the two clamping pieces are connected with the hanging beam through hanging cables;

wherein, the hanging beam is provided with a plurality of locating slots at intervals for accommodating the hanging cable.

9. Indoor lifting device according to claim 8, characterized in that the clamping member comprises:

the two clamping rods are hinged to each other at the middle parts, the tops of the two clamping rods are connected through a connecting rope, and the lifting cable is connected with the connecting rope;

the supporting plates are provided with two supporting plates, are respectively arranged at the bottoms of the corresponding clamping rods and extend inwards.

10. Indoor lifting device according to claim 9, characterized in that the pallets are each provided with a non-slip mat.

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