JPH0275590A - Lift with unloader - Google Patents

Abstract

PURPOSE:To attain a safety on an operation and a rationalization by attaching a horizontal movement guide roller mechanism having a length stored on a load carrying platform upon a storing operation and protruding to a working floor for receiving and delivering an article to be carried from the platform with the same level maintained upon an unloading operation to the load carrying platform. CONSTITUTION:After a carrier 10 is elevated to an objective operating floor, the carrier 10 is stopped under the state that a difference in height between the upper face of a load carrying platform 12 and the upper face of an operating carriage 50 is hardly produced. Then, when a boom plate 17 is inclined, the boom plate 17 bridges between the platform 12 and the carriage 50. When an operator stands on the platform 12 and pushes an article A to be carried to the carriage 50 side, a pallet B is directly moved by the roller groups 33 of a horizontal movement guide roller mechanism 30 and moved from the platform 12 to the carriage 50.

Description

[Detailed description of the invention] Industrial field of application: The present invention is mainly used at construction sites of high-rise buildings to streamline the lifting and lowering of materials, especially to efficiently transport objects from lifting platforms. The present invention relates to a lift that has the ability to move easily and safely to the required work floor.

Conventional technology and issues: At construction sites for high-rise buildings, high-rise lifts are commonly used as equipment other than cranes to transport materials to high places. The materials transported by this lift are loaded onto the platform of the lift and transported to the target work floor, but in recent years there has been a demand for easy handling in order to streamline work.

For this reason, when loading objects onto the platform of a lift on the ground floor or the like, a forklift or the like is used to easily carry out the loading operation.

However, when ascending to the destination floor and discharging the transported items from the loading platform onto the floor of the work floor, there is often a gap (within 40 mm according to regulations) between the floor and the loading platform on the lift side. Transport machines such as forklifts cannot be used because of the danger of exceeding the load limit. Therefore, measures are taken to manually lower the objects from the loading platform onto the work floor.

Naturally, there are issues with operational safety and rationalization.

Means for Solving the Problems: The present invention solves the above-mentioned problems, and makes it possible to lower the transported object, which has been carried up to a target high position by a lift, from the loading platform to the working floor. To provide a high-rise lift with a function that allows cargo handling to be carried out in a planned manner by attaching a loading/unloading mechanism to the lift loading platform that can be rationally and safely checked without resorting to complicated mechanisms. be.

That is, the present invention provides a construction lift configured such that a carrier having a loading platform attached to the front side is raised and lowered along at least two guide rails supported by a structure and erected: The frame is equipped with a clamp device that can clamp the guide rail and temporarily fix the carrier at a desired position. The lift is equipped with a loading/unloading device characterized by being equipped with a lateral movement guide roller mechanism that protrudes toward the work floor side while maintaining the same level.

In the lift of the present invention, various types can be employed as the lateral movement guide roller mechanism for the transported object attached to the loading platform of the carrier.

The first method of the lateral movement guide roller mechanism in the present invention is as follows:
On the top of the loading platform, multiple roller units are fixed in parallel and are rotatably supported, with multiple rollers arranged at required intervals parallel to the front edge of the loading platform, and can be raised and lowered along the front edge of the loading platform. A roller similar to the roller unit on the loading platform and its support frame are attached to an undulating plate having a length equal to or less than the height of the handrail and whose base end is pivoted, and are connected to the operation of the clamp device for fixing the carrier. A hydraulic cylinder is used to lower and raise the undulating plate.

Another method of the lateral movement guide roller mechanism of the present invention includes a plurality of roller units rotatably supported on the top surface of the loading platform, in which a plurality of rollers are arranged at required intervals in a direction parallel to the front end of the loading platform. These roller units are arranged in parallel, and their roller support frames are interconnected with the adjacent ones, so that the roller units other than the one at the base are paid out sequentially from the end unit. The movable roller units are arranged symmetrically (but not limited to) with respect to the center of the carrier, and are connected to each other by horizontal connecting members.

The lower surface of the support frame of the movable roller unit in this lateral movement guide roller mechanism that is drawn out from above the loading platform and stretched is provided with support legs that stand up when pulled out from above the loading platform toward the work floor. , the load acting on the transfer support surface in the extended state is supported by the support legs on the work floor surface. The support legs are configured to be folded as they are when the movable roller unit is stored on the loading platform.

The roller unit of the lateral movement guide roller mechanism according to the present invention has a large number of rollers that move in the stretching direction and are arranged at appropriate intervals. Alternatively, a large number of ball-shaped rollers may be disposed on the upper surface without coming off. Also, if necessary, rollers and balls can be arranged and assembled as appropriate.
It is also possible to adopt a combined model e. In the case of such a combination type, when unloading a palletized object from the loading platform, it is possible not only to move straight but also to shift it in an oblique direction.

Further, in the present invention, the lateral movement guide roller mechanism attached to the loading platform of the carrier has a structure in which its support frame can be attached to and detached from the loading platform, and when the loading operation is not carried out with the loading device on a pallet. , it can be removed from the loading platform.

Effect: According to the lift of the present invention, when the lift is installed and used, for example, at a construction site of a high-rise building, all the objects to be lifted and transported are placed on a pallet with a size that can be loaded on the loading platform of the carrier. Materials, etc. (objects to be transported) to be transported to a high location are loaded onto a loading platform by a forklift on the ground floor. On this ground floor, a lift will be installed so that the receiving surface of the carrier can be placed in a receiving surface, and the receiving surface of objects transported by a forklift or the like on the ground floor can be set in such a manner that there is no problem in sweeping.

For example, a truck (preferably equipped with swivel wheels) is prepared on the work floor where the objects loaded on the carrier are received and removed, and the material lift operator approaches the removal position and stops the truck. It is convenient that a large number of rollers are arranged on the upper surface of the cart.

When the lift has ascended to the required work floor, the loaded pallet is moved by the attached lateral movement guide roller mechanism on the loading platform of the lift, and the pallet is moved against the top surface of the work cart that has been prepared in advance.
Stop at a height where it can move horizontally. At this time, a clamp device attached to the carrier is activated to clamp the guide rail and fix the carrier.

If the lateral movement guide roller mechanism attached to the loading platform is of a type in which, for example, a roller unit is fixed on the loading platform and the rollers are attached to a plate that rises and falls on the front edge of the loading platform, the handrail on the front side of the loading platform can be lowered. (Equipped with a handrail that doubles as a fence to protect the cargo from falling outward even if it collapses while being lifted or lowered.) After that, the undulating plate is moved forward by a hydraulic operation mechanism. This undulating board is placed on the work cart and the loading platform, which have been waiting in advance. Note that a support such as a jack is placed on the side of the truck in advance to prevent the cargo from tipping over.

After this state is reached, if the worker gets on the platform of the carrier and pushes the object loaded on the pallet toward the platform, it will move on the rollers on the platform and move up and down. It can be moved horizontally across the board onto a trolley and transferred. In other words, the pallet can be moved horizontally without difficulty by transferring the roller group.

This operation depends on the pushing force of the worker, so if you adjust the movement to be gentle, you can safely transfer without overrunning.

After the transfer to the trolley is complete, the undulating plate is raised, the lowered handrail is raised and returned to the specified position, and the clamp device is then reversely activated and released, allowing the carrier to be raised and lowered. Carry out the next transport.

If the lateral movement guide roller mechanism provided on the carrier loading platform is a telescopic roller unit, the carrier is raised to the required floor as described above, the clamp device is activated to secure it to the guide rail, and then the handrail is fixed. Then, a multi-stage extendable roller unit is pulled out from the work floor side and the hook is passed between it and the trolley (this operation may be automated if necessary. For example, the moving operation is performed using a hydraulic cylinder, etc.) ) In this case, although the pallet naturally contacts each roller of the roller unit on the loading platform and a load acts on it, the rollers do not roll and interfere with the pull-out operation.

After the movement guide roller unit is extended and installed between the loading platform and the work truck, the worker can easily transfer the object by getting on the loading platform and pushing the object toward the truck. Can be done.

In addition, when the roller unit is extended, the support legs attached to the lower surface of the support frame automatically stand up downward.
Since it comes into contact with the floor and the intermediate part is supported by the support legs, it can withstand the load mounted on the pallet during movement without causing any trouble.

After the work is completed, the extended roller unit is reversely operated to store it on the loading platform, and after restoring each part attached to the loading platform, the clamp operation is released, and the lift is returned to a normal operating state.

Example: DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments.

FIG. 1 shows a specific example of a lift equipped with an apparatus for loading and unloading objects according to the present invention, in which a carrier is moved up and down along a guide rail by a rope drive. 1 is a tower equipped with guide rails 2 on both sides. The carrier 10 is raised and lowered along the front surface of the tower by means of a hanging rope 5 which is operated by a hoist 4 installed at the bottom, which goes around a pulley 6 attached to a series 3 attached to the top of the tower 1. The tower 1 is extended to a required height by adding segments of a predetermined length, and is supported in an upright state by a support on a structure. This carrier 10 has a loading platform 12 attached to the lower front of an elevating frame 11, with the front surface parallel to the front surface of the guided tower 1 being the receiving side of the transported object (not limited to this). ing. The elevating frame 11 is also provided with a safety device 13, which will be described later, and is provided with guide rollers that engage and roll with guide rails 2 attached to the tower 1 at upper and lower positions on both sides.

FIGS. 2 to 6 show specific examples of the carrier 10, in which a support piece 14' of a hanging pulley 14 is attached to the upper part of the lifting frame 11 so as to be movable in the vertical direction. A safety device 13 is provided, which includes a wedge mechanism 13' that comes into contact with the emergency guide rail 2 and is gradually tightened by the load of the carrier, and a link mechanism 13'' that operates the wedge mechanism 13'.A hydraulic cylinder is installed at the bottom of the elevating frame 11. An example of this clamping device 20 is shown in FIG.
2.In the side view U, which has hook-shaped tips 22' and 22' at two upper and lower locations, is movably inserted into a cylindrical support frame 21 attached to the lower side (not limited thereto) of the unit. A hydraulic cylinder 24 that supports the trunnion bin 23 and operates the clamp by a shaft support installed at the rear of the clamp body 22, and a hook-shaped tip 22' of the clamp body 22 (with an H-shaped cross section). inserted into the groove 2' of the guide rail 2 (which may be made of channel steel)
The clamp main body 2 faces the pad 22″ attached to the front side.
The attached reaction force receiver consists of a clamp roller 26 interposed between the piece 25 and operated by a hydraulic cylinder 24. The reaction force receiving pieces 25, 25, and the clamp roller 26 receiving side have an inclined surface 25' having a downward slope toward the input side.

The clamp roller 2G and the rod 24' of the operating hydraulic cylinder 24 are connected by rods 26' and 26'. Before operation, this clamp roller 26 is as shown in the figure, and when the clamp is operated, it rolls on the front surface of the guide rail 2 and comes into contact with the inclined surface 25', and the roller 26 and the pad 2
The reference numeral 21' in the figure indicates a plate piece that receives the pullback reaction force of the clamp main body 22, and is in contact with the rear end surface of the piston rod 24' end connecting piece 24''. The effect of pulling back the clamp roller 26 is obtained by utilizing the retraction action of the cylinder piston.

This hydraulic cylinder 24 for clamp operation has a loading platform 12.
This clamp device 20 can be operated by giving a command to a hydraulic unit 27 mounted on the inner lower part. In addition.

It is effective if this clamp device 20 is electrically connected to a speed detector (not shown) so that it can also be used as a safety device.

As shown in FIGS. 3 and 4, on the loading platform 12 of the carrier 10 equipped with such a mechanism, there is attached a lateral movement guide roller machine [30] for carrying objects to be loaded.

This lateral movement guide roller mechanism 30 is designed to handle the transported object (in principle, it is mounted on a pallet.Of course, if the object is simple in shape and has a flat bottom surface, a pallet is not needed. A frame 32 of an appropriate width is constructed on the upper surface of the loading platform 12, except for the required section where the forks of a forklift used for loading and unloading items on the ground floor etc. A roller unit 31 that rotatably supports a roller 33
are fixedly arranged in multiple columns.

Naturally, the roller arrangement of each roller unit 31 is
It is installed so that it is parallel to the front end of 2. Also,
A relatively long undulating plate 17 is attached to the front edge of the loading platform 12 by connecting pins at the base end over almost the entire width of the loading platform 12. On the surface of this undulating plate 17, there are a number of roller units similar to the roller unit described above. A roller 33 is disposed with a support 34 interposed therebetween.

The top surfaces of the rollers of each of the roller units 31 described above are arranged so as to be substantially flush with each other.

The undulating plate 17 has a structure in which its both ends are raised and lowered by link mechanisms 18 as shown in FIG. That is, the lower end of a lever link 18b supported by a pin 18c on the lower side of the loading platform plate is connected to the end of a hydraulic cylinder 18' rod 18'' whose base end is supported by a pin on a bracket 18a on the lower surface of the loading platform 12, and the lever is The upper end of link 18b is slit 1
It has a structure in which it protrudes from the upper surface of the loading platform 12 through a connecting link 18d and is connected with a pin to a bracket 188@ attached to the undulating plate 17 side through a connecting link 18d.The hydraulic cylinder 18' for the above operation is a hydraulic unit. 27 so that it also cooperates with the clamp device 20.

In addition, on the front peripheral surface of the loading platform 12, there are pillars 15 erected at both ends.
15, the front loading platform handrail 16 can be manually lowered from the normal position to below the upper surface of the loading platform by adjusting it with a counterweight 15'.

The clamping device 20 for fixing the carrier 10 and the undulating plate 17 described above are operated by a worker on the work floor using a push button switch 19 provided at the front end corner of the loading platform 12. , this push button switch 19
The position is attached to a pole installed at a height that makes it impossible to operate the handrail 16 when it is moved to its upper limit.

When transporting materials by the carrier 10 of a lift equipped with such a lateral movement guide roller mechanism 30, the tower 1 equipped with the guide rails 2 is usually set up from the underground floor, and the shock absorbers and lobe guides at the bottom are connected to the carrier. The equipment will be installed in such a way that it will not hinder the lowering of the equipment, and the equipment will be placed so that the items to be transported can be received and swept onto the platform by a transporter such as a forklift on the basement floor.

On the ground floor, lower the handrail 16 in front of the loading platform 12 of the carrier 10,
First, the clamp device 20 is actuated with the operation switch to fix the carrier 10 to the guide rail 2, and then the elevating link mechanism 18 of the elevating plate 17 is actuated to tilt the elevating plate 11 forward.

In this state, the palletized objects (materials, etc.) to be conveyed are loaded onto the loading platform 12 by a forklift. At this time, the fork of the forklift touches the part of the lateral movement guide roller mechanism 30 on the loading platform 12 where the roller unit 31 is not arranged. If the pallets are stacked in such a way that the pallets are placed on the group of rollers 33, there will be no problem when the forks retreat later. In addition, if a pallet loaded with objects to be transported is placed in a state that does not completely fit on the loading platform 12, the worker must move the loaded objects onto the loading platform 12 from the work side (front side). When pushed, it can be easily moved and accommodated by the undulating plate 17 and the group of rollers 33 of the lateral movement guide roller mechanism 30 on the loading platform 12. When the loading of the objects to be transported onto the loading platform 12 is completed, the undulation plate 17 is raised by operating the undulation link mechanism 18 in the opposite manner to that described above.
Then, after releasing the clamp device 20, the handrail 16 is pulled up to a predetermined position.

In this state, the roller 33 wall attached to the undulating plate 17 does not come into contact with the conveyed object on the loading platform 12, but of course, if it does come into contact with it, it plays the role of preventing lateral vibration caused by the roller unit 31 attached to the loading platform 12. I will accomplish it.

After the carrier 10 has been raised to the target work floor, the elevating frame 11 of the carrier is fixed by the clamp device 20 in the same manner as when working on the ground floor. At this time, on the work floor, a work cart 50 (see Fig. 7), which is equipped with a number of rollers on the upper surface for easy movement, is brought to a stop near the end of the floor at the load receiving position of the lift. Therefore, the carrier 10 is stopped in a state where there is not much difference in height between the top surface of the loading platform 12 and the top surface of the work cart 50. After that, when the undulating plate 17 is tilted, the loading platform 12 and the work cart 5 are
As shown in FIG. In addition, in order to prevent the cart 50 from tilting and falling during the transfer of the transported object, a support 51 such as a jack before work is temporarily supported by extending it between the support side and the floor surface. When a worker stands on the loading platform 12 and pushes the transported object A onto the trolley So@, the pallet B is moved by the group of rollers 33 of the lateral movement guide roller mechanism 30, and is pushed from the loading platform 12 onto the trolley 5.
It can be transferred onto 0.

When the transfer is completed, the undulating plate 17 is raised and the clamping device 2
Release the clamp of the guide rail 2 by 0 and remove the handrail 16.
By returning to its original position, the carrier is lowered and returned to the next work.

The above model has a lateral movement guide roller mechanism built into the undulating plate and the loading platform, but a different type of lateral movement guide roller machine 130A is shown in FIGS. 8 and 9. Configurations can be adopted.

In this model, a plurality of rows of roller units 35 and 3 are placed on the loading platform 12 of the carrier 10 symmetrically with respect to the center line.
51 and 352 (specifically, three rows each), the two inner units 351 and 352 are movable, and the outermost unit 35 is fixed. These roller units 35, 351, 352
In each case, as shown in the figure, a large number of rollers 37 are rotatably supported at both ends of a support shaft and are disposed at a required pitch on a support frame 36 that is framed in a rectangular shape with a required width. The movable roller unit 351 adjacent to the fixed roller unit 35 is attached to the support frame 36 of the fixed roller unit 35.
A guide roller 3a, which is engaged with the longitudinal side of the guide groove 36' and can be moved freely, is engaged with and guided in the guide groove 36'. The support legs 39 are attached so as to hang downward away from the loading platform 12 for support, and fall down when moving toward the loading platform 12 and stand up when projected from the loading platform. The innermost roller unit 352 is also similar to the movable roller unit 351 described above. Note that all roller units are sized to fit inside the handrail surrounding the loading platform 12. Also, the left and right roller unit sets can be made to expand and contract independently, or as shown in the example diagram, they can be connected to each other using horizontal connecting members 353 and 354 so as not to hinder the movement of each unit. It may have a similar structure.

When each of the movable roller units 351 and 352 protrudes to the maximum movement position, the movable roller units 351 and 352 are connected to the adjacent unit support frame so that they do not come off with a stopper (not shown) attached by a known means. It is attached. In addition, this movable roller unit 351.3
As for 52, it is possible to move it forward and backward manually, and it is also possible to use power for other purposes. However, it is preferable that the structure is not complicated.

Further, even when the roller units 35, 351, and 352 are on the loading platform 12 and in the stretched state, the upper top surfaces of the rollers 37 forming the upper surface of each unit are arranged so that the entire surface is substantially horizontal. It is preferable that the If the rollers move in and out rapidly, the difference between the rollers that are loaded and those that are not increases, and the smooth rolling function is lost, which not only impairs work efficiency, but also makes it easier for rollers that receive concentrated loads to be damaged. .

Even when this type is adopted, the lifting and lowering of the carrier, stopping at the target position, and fixing of the lifting frame by the clamp device are the same as in the previous embodiment. When loading the objects to be transported onto the loading platform 12 at the destination position, work by using the undulating plate 17' (in the case of this model, this undulating plate 11' to straddle the gap (at least 40 ma+) between the hoistway of the lift and the work floor). A safe length, for example, about 300 m, is required) and the cargo is loaded and unloaded using a forklift.

When lifting the carrier and unloading onto the work trolley A, fix the carrier 10 in a predetermined order, lower the handrail 16, and lower the undulating plate 1.
7' forward, manually pull out the movable roller unit 352 (inside position) of the lateral movement guide roller mechanism 3OA to the work floor side and move it to the desired position.
When the roller unit 352 is pulled out for a certain length, the next movable roller unit 351 is subsequently pulled out.

Both sets of roller units 352 and 351 can be stretched in cooperation with each other easily between the guide arm 36' and the guide roller 38 on the side of the support frame. At the same time, when the supporting legs 39 attached to the lower surface leave the end of the loading platform 12, they stand up due to the spring force provided close to the bin connection position, and support the intermediate part on the lower side on the work floor.

In this way, the required distance, the lateral movement guide roller mechanism 3OA
When the roller units 351 and 352 are pulled out, their tips are hung on the work trolley A to create the state shown in FIG. It can be easily transferred by holding the container in place and pushing it. Since the central part of the loading platform becomes blank during movement, if a roller is fixedly disposed in the central part, the load acting through the pallet can be supported without any problem.

According to this method, it is possible to pull out the lateral movement guide roller mechanism 3OA for a long time, so even if the work cart cannot be brought close to the floor edge of the sweep section, the cargo receiver of the lift can be moved from the carrier onto the work cart without any hindrance. This means that the objects to be transported can be transferred.

When the load transfer work is completed, the movable roller units 351 and 352 that have been pulled out are manually operated (in the case of a power type, the drive mechanism is operated in reverse) and pushed back onto the loading platform 12 to be stored on the loading platform 12. can. After that, undulating board 17
In addition, by reversely operating the clamp device 20 and by pulling up the handrail 16, the carrier 10 is disconnected from the work floor and can be moved up and down freely.

In the above two types of methods, if the balls are arranged between the roller arrays of the roller unit so that they do not fall out, the conveyed object can be moved not only in a straight line by the rollers, but also in a diagonal manner. It also becomes possible.

Further, regarding the roller unit, in the above specific example, rollers are arranged in a line at a required pitch, but instead of the rollers, a large number of balls arranged in a non-removable manner may be used.

In this case, in order to prevent meandering, a small roller that can be moved up and down may be appropriately provided.

If the roller unit or the roller support that is attached as a unit is made removable from the loading platform or undulating plate, it will be easier to repair the roller unit or use the lift at a work site where the pallet system is not used. It is convenient because the roller unit and the like can be removed for inspection, repair, or storage.

Effects of the invention: According to the present invention, when unloading objects loaded on the platform of a carrier using a lift installed and used at a construction work site,
If a method is adopted in which the objects to be transported are stacked on pallets and transported, by preparing a moving cart on the work floor side of the target floor, the carrier can be temporarily fixed in a predetermined position and the loading platform can be moved. By folding down the undulating plate on the front of the truck, a worker can easily unload the truck by standing on the truck and pushing it sideways, and can also transfer it directly onto the truck. Therefore, it has become possible to rationally transport materials and carriers in a planned manner. In particular, since it has a simple configuration in which a roller unit is attached to the loading platform of the carrier as a lateral movement guide roller mechanism, there is no fear of breakdowns due to the complexity of the device, and it can be said to be economically effective.

[Brief explanation of the drawing]

Fig. 1 is a front view of an example of a construction lift equipped with the loading/unloading device of the present invention, Fig. 2 is a partially cutaway front view of a lift carrier equipped with the loading/unloading device of the present invention, and Fig. 3 is a front view of an example of a construction lift equipped with the loading/unloading device of the present invention. ■−■ in Figure 2
4 is a view from IV-IV in FIG. 2, FIG. 5 is a sectional view showing a specific example of the clamp device, FIG. 6 is a diagram showing the undulation link mechanism of the undulation plate, and FIG. A diagram showing one aspect of unloading from the loading platform, FIG. 8 is a diagram showing the sideways movement guide roller mechanism, and figures to FIG. 9 showing the aspect when it is pulled out are partially enlarged. The plan view shown in FIG. 10 is a diagram showing the mode of use.

Claims (1)

[Claims] 1. In a construction lift configured to move up and down a carrier with a loading platform attached to the front along two guide rails: , equipped with a clamp device that can temporarily fix the carrier at a desired position; on the loading platform, the length is such that it fits on the loading platform when stored, and when loading and unloading, the same level is placed from the loading platform to the work floor side for receiving and receiving the transported object. A lift equipped with a loading and unloading device, characterized in that it is equipped with a lateral movement guide roller mechanism that is held and extended. 2. The lateral movement guide roller mechanism has a plurality of roller units arranged in a direction parallel to the front end of the loading platform and rotatably supported by a plurality of rollers arranged at required intervals, which are fixed in parallel on the loading platform. A roller similar to the roller unit and its support frame are attached to an undulating plate having a length equal to or less than the height of the handrail, the base end of which is pivoted along the axis, and the undulating plate is lowered and raised by a hydraulically actuated cylinder. A lift comprising a loading/unloading device according to claim 1. 3. The lateral movement guide roller mechanism has a plurality of roller units arranged in parallel on the upper surface of the loading platform, each of which has a plurality of rollers arranged in a direction parallel to the front end of the loading platform and rotatably supported and arranged at a required interval. Claim: These roller units are horizontally expandable and retractable roller units whose roller support frames are interconnected with adjacent ones so that units other than the base unit are sequentially extended out of the loading platform from the first unit. A lift equipped with a loading/unloading device according to item 1. 4 Roller units that expand and contract at a horizontal level and are extended outward from the loading platform are arranged symmetrically with respect to the center of the carrier, and both movable roller units are connected horizontally to each corresponding unit. 4. A lift with loading and unloading devices according to claim 3, which are interconnected by means of a material. 5. The roller unit according to any one of claims 3 and 4, wherein a support leg is attached to the lower surface of each roller support frame of the movable roller unit so that it stands up when pulled out from the loading platform toward the work floor. Lift with loading and unloading equipment. 6. A lift equipped with a loading/unloading device according to any one of claims 1 to 4, wherein a large number of balls are arranged as rollers of the lateral movement guide roller mechanism in a state that they do not come off. 7. A lift equipped with the loading/unloading device according to any one of claims 1 to 4, wherein the rollers of the lateral movement guide roller mechanism are provided by combining a large number of rollers and balls in an appropriate distribution. 8. A lift equipped with a loading/unloading device according to any one of claims 1 to 7, wherein the roller unit of the lateral movement guide roller mechanism is removably attached to the loading platform.