CN115258699B - Semi-automatic collecting plate stacking device and stacking method thereof - Google Patents

Abstract

The invention relates to the technical field of stacking of container plates, in particular to a semi-automatic container plate stacking device and a stacking method thereof. The invention utilizes the sucking disc to carry the container plate after the container plate is sent into the machine body, and adjusts the direction of the container plate in the carrying process, after the container plate is placed on the transfer trolley, the placing angle of the next container plate is different from the placing angle of the container plate, so that two container plates stacked together can have a certain non-overlapping part, and the part and the protruded corner can be used as a force application point during carrying, thereby facilitating the subsequent loading and unloading of the container plates.

Description

Semi-automatic collecting plate stacking device and stacking method thereof

Technical Field

The invention relates to the technical field of stacking of container plates, in particular to a semi-automatic container plate stacking device and a stacking method thereof.

Background

The packaging plate is a tool for bearing goods, and a plurality of assembled finished packaging plates need to be stacked before being put into use and are conveyed into different cargo compartments for use through a transfer tool.

In the prior art, automatic stacking equipment is usually arranged on an assembly line for the container plates, the container plates are usually sucked through electric suckers and are moved to different stations, however, in the traditional stacking mode, the container plates are stacked together in the same direction, when the container plates are dismounted for use, gaps or corners which can serve as bearing points are difficult to find between two adjacent container plates, and much inconvenience is brought to the process of dismounting the container plates from the transfer equipment.

Accordingly, a semi-automatic pallet stacking apparatus and a stacking method thereof are provided to solve the above-mentioned problems.

Disclosure of Invention

Solves the technical problem

Aiming at the defects in the prior art, the invention provides a semi-automatic container plate stacking device and a stacking method thereof, which can effectively solve the problems that the container plate stacking method in the prior art keeps consistent and no gap or corner is formed between adjacent container plates to serve as a stress point.

Technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme:

the invention provides a semi-automatic collecting and loading plate stacking device which comprises a machine body and a material guiding mechanism, wherein one side of the machine body is provided with a transfer trolley which can move along the width direction of the machine body and is used for bearing stacked collecting and loading plates, the material guiding mechanism comprises a sliding plate which can reciprocate along the length direction of the machine body, the sliding plate is provided with a rotatable connecting column, and one end of the connecting column is provided with a sucking disc which is used for sucking the collecting and loading plates and transferring the collecting and loading plates to the transfer trolley.

The machine body is provided with a guide rail, the guide rail is arranged at the upper end part of the sliding plate, a steering groove is arranged on one side of the guide rail, the steering groove is provided with two sections which are respectively positioned on two sides of the length direction of the guide rail, each section of steering groove at least comprises two steering teeth which are arranged along the length direction of the machine body, the steering teeth which are arranged close to the side of the transfer vehicle are movably connected with the guide rail and can guide and move along the width direction of the machine body, and a gear which is meshed with the steering groove is arranged at the upper end part of the connecting column.

Further, the organism is including guide platform and buffer board, the guide platform is established in one side of organism, the buffer board is equipped with two and symmetric distribution in the top of guide platform, and every buffer board all with guide platform parallel distribution, and its one side is connected with a deflector perpendicularly respectively, wherein, the sucking disc is flexible in the spliced pole through a slide bar, and the side that is located the slide bar is connected with a guide bar perpendicularly, the guide bar link up the setting toward guide board one side, and is located and sets up the chute that includes the confession guide bar on the deflector.

Furthermore, the chute extends along the length direction of the machine body integrally and comprises an ascending portion, a translation portion and a descending portion, the ascending portion extends upwards in an inclined mode from one side of the machine body, the translation portion extends from one side of the ascending portion to the direction of the transfer trolley and keeps consistent with the length direction of the machine body, the descending portion is arranged on one side of the translation portion and is arranged in an inclined mode, and empty grooves are formed in the positions, corresponding to the ascending portions, of the two buffer plates respectively.

Furthermore, two the buffer board corresponds translation portion punishment and rotates respectively and install a plurality of and change the roller, it establishes perpendicularly in the buffer board towards the one end of collecting the board to change the roller.

Further, translation portion is equipped with two archs that are domes, the arch is arched up and is set up with the middle part symmetry of translation portion, wherein, is located and still is equipped with a volume and glues the subsides on the organism, glue and paste and can move to protruding department when moving up at the guide bar, order about the collection board and shift up, the collection board shifts up the in-process and glues the upper end of pasting at the collection board.

Furthermore, a hot cutter is arranged on one side of the coiled adhesive tape, and the cutting surface of the hot cutter is opposite to the moving direction of the container plate.

Furthermore, the whole material of gluing is for having elastic plastic pad, and its one end covers has the viscose and sets up towards the collection dress board direction.

Further, the guide rail comprises a fixed rail and a movable rail, the movable rail is arranged above the transfer trolley and is rotatably arranged on the side surface of the fixed rail, and the two sections of steering grooves are respectively positioned on the fixed rail and the movable rail.

The scheme also provides a container plate stacking method, which is applied to the semi-automatic container plate stacking device and comprises the following steps:

step 1: moving the riveted finished product assembling plate to the machine body, and adsorbing the finished product assembling plate on the upper end surface of the assembling plate by using a sucking disc arranged on the machine body to move towards the other side of the machine body;

step 2: in the moving process of the collecting plate, the collecting plate firstly rotates to a certain extent to drive the collecting plate to move along the length direction of the machine body in an inclined manner until the collecting plate reaches the position right below a hollow groove arranged between the two buffer plates, and at the moment, the collecting plate is enabled to move upwards and penetrate through the hollow groove to reach the upper ends of the buffer plates;

and 3, step 3: the container plate is continuously moved to the direction of the transfer trolley, and two pieces of glue paste are pasted at the upper end of the container plate;

and 4, step 4: when the container plates reach the upper part of the transfer trolley, the placing angles of the upper and lower container plates are different by adjusting the angles of the container plates, and when the container plates on the transfer trolley are stacked to a certain height, the transfer trolley is driven to leave the machine body.

Advantageous effects

Compared with the known public technology, the technical scheme provided by the invention has the following beneficial effects:

the invention utilizes the sucking disc to carry the container plate after the container plate is sent into the machine body, and adjusts the direction of the container plate in the carrying process, after the container plate is placed on the transfer trolley, the placing angle of the next container plate is different from the placing angle of the container plate, so that two container plates stacked together can have a certain non-overlapping part, and the part and the protruded corner can be used as a force application point during carrying, thereby facilitating the subsequent loading and unloading of the container plates.

Drawings

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

FIG. 1 is a schematic view of an embodiment of the present invention with a pallet at a guide table;

FIG. 2 is a schematic flow diagram of an assembly station of the pallet according to an embodiment of the invention;

FIG. 3 is a schematic view of the package board at the position of the buffer board according to the embodiment of the present invention;

FIG. 4 is a schematic view of a material guiding mechanism according to an embodiment of the present invention;

FIGS. 5 (a), 5 (b), 5 (c) and 5 (d) are schematic diagrams of pallet stacking processes according to embodiments of the present invention;

FIG. 6 is an enlarged view of the structure at A in FIG. 5 (c) in an embodiment of the present invention;

FIG. 7 is a schematic diagram illustrating a state of the movable rail and the gear according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a movable rail according to an embodiment of the present invention;

fig. 9 (a) and 9 (b) are schematic structural diagrams of the moving rail in the embodiment of the present invention.

The reference numerals in the drawings denote: 1. a body; 11. a transfer trolley; 12. a guide rail; 121. fixing a rail; 122. moving the rail; 13. a steering groove; 131. a steering tooth; 14. a material guiding platform; 15. a buffer plate; 151. a guide plate; 152. a chute; 1521. a rising part; 1522. a translation section; 1523. a descending part; 1524. a protrusion; 153. an empty groove; 154. rotating the roller; 16. gluing; 17. a hot cutter; 2. a material guiding mechanism; 21. a slide plate; 211. a gear; 22. connecting columns; 23. A suction cup; 231. a slide bar; 232. a guide bar; 3. feeding tooling; 4. and (5) riveting the tooling.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The present invention will be further described with reference to the following examples.

Example (b):

the integrated plate as a freight tool integrally comprises two parts, namely a fixed steel plate as a load-bearing main body and an outer frame plate riveted on the outer side of the steel plate, wherein clamping holes are distributed between the outer frame plate and the steel plate and are used as fixing points of a cargo fixing rope.

However, at present, after the assembly of the container plates, the container plates are stacked one by one on a cargo vehicle for transporting the container plates, and the container plates are moved into different cargo compartments through such a transporting device, and different numbers of container plates are taken down according to actual needs.

To this end, the present invention provides a semi-automatic pallet loading plate stacking apparatus, which can intermittently change the angle of the pallet plates during the movement of the pallet plates, so that the angles of the adjacent pallet plates are different when stacking, thereby facilitating the discharging of the pallet plates by using the corners or the protruding parts as force application points when the pallet plates are inclined.

Specifically, the scheme mainly comprises a machine body 1 and a material guide mechanism 2, wherein a transfer trolley 11 is arranged on one side of the machine body 1, can move along the width direction of the machine body 1 and is used for bearing a stacked collecting plate.

In the whole assembly line, a feeding tool 3, a tool for splicing the steel plate and the outer frame and a riveting tool 4 are sequentially arranged, and finally, a finished product is stacked by the machine body 1 in the embodiment and transferred again.

A guide rail 12 has been arranged along organism 1 length direction in the middle part of the upper end that is located organism 1, and be equipped with guide mechanism 2 of a reciprocating motion on guide rail 12, guide mechanism 2 specifically includes slide 21 and the spliced pole 22 of rotation installation on slide 21 that can guide the activity on guide rail 12, and the lower tip that is located spliced pole 22 is equipped with sucking disc 23, when off-the-shelf collection board reachs one side of organism 1, slide 21 removes the upper end of collection board, utilize sucking disc 23 to adsorb the collection board, and pull the collection board toward organism 1 length direction.

The assembly of the suction cup 23 in this embodiment can be lifted up and down in the connection column 22, the specific suction cup 23 is extended and retracted in the connection column 22 through a slide bar 231, two guide bars 232 are respectively vertically arranged on two sides of the slide bar 231, two guide plates 151 are arranged on the machine body 1 along the length direction of the machine body 1, the two guide bars 232 respectively extend vertically towards the guide plates 151 and penetrate through the guide plates 151, a chute 152 for the guide bars 232 to move inside is formed in each guide plate 151, when the sliding plate 21 moves, the guide bars 232 always abut against the chute 152, and the guide bars 232 drive the whole assembly of the suction cup 23 to move up and down by changing the gradient in the chute 152.

It should be noted that the reciprocating motion of the sliding plate 21 in this embodiment can be realized by screw transmission, the specific driving structure is the prior art, and this embodiment is not described in detail, and the specific structure of the suction cup 23 is also known in the art, and the specific suction structure is shown in detail in this embodiment and the attached drawings.

The inclined groove 152 in this embodiment has three slopes, and the whole body extends along the length direction of the machine body 1, and includes an ascending portion 1521, a translating portion 1522, and a descending portion 1523, wherein the ascending portion 1521 extends obliquely upward from one side of the machine body 1, the translating portion 1522 extends from one side of the ascending portion 1521 toward the direction of the transfer vehicle 11 and is consistent with the length direction of the machine body 1, and the descending portion 1523 is disposed at one side of the translating portion 1522 and is disposed obliquely downward.

Firstly, before reaching the ascending part 1521, the sucking discs 23 have completed the adsorption process on the container plates, and as the ascending part 1521 ascends along the slope, the container plates gradually move upwards, and two empty slots 153 are respectively formed in the two buffer plates 15 corresponding to the ascending part 1521, the two empty slots 153 are in right-angled triangle shapes, and the purpose of reservation is to allow the ascending container plates to pass through the buffer plates 15 (in this example, the extension lines of the two empty slots 153 enclose a rectangular shape, and the size of the two empty slots is slightly larger than that of the container plates);

secondly, when the pallet reaches the upper end of the buffer plate 15, it will perform a guiding travel for a certain period of time, while the height will not change (there are two ascending strokes in between, as shown later);

finally, the descending portion 1523 is reached, and the pallet is moved obliquely downward again with the change in the gradient of the descending portion 1523 until it falls to the upper end of the transfer trolley 11 for palletizing (during which there is a pallet angle change stroke, as will be shown later).

The guide rail 12 in this embodiment is divided into two parts, namely a fixed rail 121 disposed along the length of the machine body 1 and immovable or rotatable, and a movable rail 122 rotatable on one side of the fixed rail 121, wherein the movable rail 122 is rotatably mounted on one end of the machine body 1 near the transfer trolley 11 (the driving structure is not limited herein, but each rotation is 180 ° rotation.

And the movable rail 122 and the fixed rail 121 are both provided with steering grooves 13, each steering groove 13 consists of a plurality of steering teeth 131 and is arranged along the length direction of the machine body 1, a gear 211 meshed with the steering grooves 13 is arranged at the upper end part of the connecting column 22, and when the gear 211 moves along with the guide of the sliding plate 21, the gear 211 can be matched with the two sections of steering grooves 13, and the whole connecting column 22 rotates at a certain angle, so that the container plate adsorbed at the bottom of the connecting column 22 rotates at a certain angle.

When the slide plate 21 moves, when passing through the turning groove 13 on the fixed rail 121, the gear 211 can be meshed with the turning teeth 131, so that the gear 211 can rotate at a certain angle, the whole assembled plate can rotate, and when the size of the empty groove 153 is met, the gear just reaches the tail end of the rising part 1521, namely the translation part 1522.

And in the assembling process of the board that collects, need continuous carry out the pile up neatly with the sucking disc with off-the-shelf collection board, no matter be makeup and riveting process between steel sheet and outer frame plate, even follow-up pile up neatly in-process to finished product collection board, can all use the sucking disc as the traction apparatus, it is well known, the sucking disc is as an automatic traction equipment, self load is very limited, when long-term use sucking disc pulls overweight goods (collection board), can cause very big influence to the life of sucking disc, bring certain burden for the enterprise.

The machine body 1 in this example is provided with a material guiding platform 14 for temporarily placing a collecting plate (the front end of the machine body 1) for transportation, the material guiding platform 14 is arranged at one side of the machine body 1, two buffer plates 15 which are symmetrically distributed are arranged above the material guiding platform 14 in this example, and each buffer plate 15 is distributed in parallel with the material guiding platform 14.

Lie in two buffer boards 15 and correspond translation portion 1522 punishment and do not rotate and install a plurality of and change roller 154, change roller 154 and establish perpendicularly in the buffer board 15 towards the one end of collecting board, when reacing translation portion 1522, the collecting board of this moment can laminate and roll on changeing roller 154, change roller 154 and played the effect of bearing collecting board dead weight, alleviate the load burden of sucking disc 23, extension sucking disc 23 life.

Furthermore, in this embodiment, two arched protrusions 1524 are disposed at the position of the translation portion 1522, the protrusions 1524 arch upwards and are symmetrically disposed at the middle of the translation portion 1522, wherein a roll of glue paste 16 is further disposed on the machine body 1, when the guide rod 232 moves upwards to the protrusion 1524, the container plate moves upwards to make the glue paste 16 adhere to the upper end of the container plate, as shown in the drawing, when the container plate moves upwards, the upper end of the container plate adheres to the glue surface of the glue paste 16, so that a certain adhesion and dragging of the glue paste 16 to extend in the moving direction of the container plate can be performed, and a hot cutter 17 is further disposed at one side of the glue paste 16, the cutting surface of the hot cutter 17 is opposite to the moving direction of the container plate, and after a period of dragging, the back surface of the glue paste 16 is cut by the hot cutter 17, and the glue paste 16 is broken and adheres to the container plate (the working principle and connection of the hot cutter 17 in this embodiment are not known technology, and this embodiment is illustrated in detail).

It should be noted that in this embodiment, two sides of the machine body 1 are both provided with a roll of glue 16, after the gluing process is completed, two sides of the upper end surface of the container board are both provided with a roll of glue 16 (the glue 16 can be replaced manually), and the other end surface of the glue 16 (the back of the end surface where the glue surface of the glue 16 is located) is adhered with an oiled paper layer, which has a low adhesion with the glue surface.

The adhesive 16 in this embodiment is a plastic pad with good elasticity, and one end of the adhesive is covered with adhesive and is arranged toward the container plate, and only serves as an intermediary between the upper and lower container plates, and serves as a certain partition, so that the situation that in the pre-processing process, the end surface of the container plate has sharp or sundries with a certain thickness is avoided, under the action of the dead weight of the container plate, the flatness of the end surface of the container plate at the lower end of the container plate is damaged, meanwhile, a certain gap (about 50 mm) is generated through the certain partition, the container plate is convenient to detach to a certain extent, meanwhile, the friction force between adjacent container plates is increased to a certain extent when the container plates are stacked, the stability during stacking and transferring is improved, and the container plates are not easy to shift.

The turning teeth 131 on the moving rail 122 are movably connected to the guide rail 12 and slide along the width direction of the machine body 1, a traction mechanism is connected to the rear side of each turning tooth 131 (in the present embodiment, an electric push rod is used as a traction tool for the turning teeth 131, which is not specifically limited, and is common knowledge, and the corresponding traction mechanism is not shown in detail), when the number of the turning teeth 131 capable of being matched with the gear 211 is smaller, the rotation angle of the container plate is smaller, and the turning teeth 131 on the moving rail 122 are arranged at the beginning of the descending portion 1523 (the position is not limited, and the rotation can be completed before or during descending), when the container plate descends, the container plate can be stacked on the trolley 11.

It should be noted that the transfer vehicle 11 in this embodiment has a cavity in the middle, and the bottom of one side of the machine body 1 is provided with a lifting pallet driven by a cylinder or other lifting structure, and when reaching a predetermined position, the pallet is lifted upwards, and after the pallets are dropped one by one and stacked, the pallet gradually descends until reaching the maximum bearing degree, the stacking is stopped, and the transfer vehicle 11 is moved away.

At this time, the sliding plate 21 starts to return to the front end of the machine body 1 again, and the moving rail 122 in this example can rotate, and at this time, the rotating teeth 131 rotate 180 degrees to adjust the direction, so that the rotating direction of the next group of container plates arriving at the position is different from the inclined direction and angle of the previous group of container plates, the corners of the container plates protrude when stacking, and the force application area to the container plates when unloading is increased. The stacked pallet plates are convenient to unload.

The scheme also provides a container plate stacking method, which is applied to the semi-automatic container plate stacking device and comprises the following steps:

step 1: moving the riveted finished assembled plate to the machine body 1, and adsorbing the riveted finished assembled plate on the upper end surface of the assembled plate by using a sucking disc 23 arranged on the machine body 1 to move towards the other side of the machine body 1;

step 2: in the moving process of the collecting plate, the collecting plate is firstly rotated to a certain extent, the collecting plate is obliquely moved along the length direction of the machine body 1 until the collecting plate reaches the position right below an empty groove 153 formed between the two buffer plates 15, and at the moment, the collecting plate is enabled to move upwards and penetrate through the empty groove 153 to reach the upper ends of the buffer plates 15;

and step 3: the container plate is continuously moved towards the direction of the transfer trolley 11, and two glue pastes 16 are respectively pasted on the two sides of the upper end of the container plate in the width direction;

and 4, step 4: when the container plates reach the upper part of the transfer trolley 11, the arrangement angles of the upper and lower container plates are different by adjusting the angles of the container plates, and when the container plates on the transfer trolley 11 are stacked to a certain height, the transfer trolley 11 is driven to leave the machine body 1.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not depart from the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims (6)

1. The utility model provides a semi-automatic collecting plate pile up neatly device which characterized in that includes:

the transfer trolley is arranged on one side of the machine body, can move along the width direction of the machine body and is used for bearing the stacked collecting plates;

the material guiding mechanism comprises a sliding plate capable of reciprocating along the length direction of the machine body, a rotatable connecting column is arranged on the sliding plate, and a sucking disc is arranged at one end of the connecting column and used for sucking the collecting plate and transferring the collecting plate to a transfer trolley;

the machine body is provided with a guide rail, the guide rail is arranged at the upper end part of the sliding plate, a steering groove is arranged on one side of the guide rail, the steering groove is provided with two sections which are respectively positioned on two sides of the length direction of the guide rail, each section of steering groove at least comprises two steering teeth which are arranged along the length direction of the machine body, the steering teeth which are arranged close to the side of the transfer vehicle are movably connected with the guide rail and can guide and move along the width direction of the machine body, and a gear which is meshed with the steering groove is arranged at the upper end part of the connecting column;

the machine body comprises a material guide table and buffer plates, the material guide table is arranged on one side of the machine body, the buffer plates are two and symmetrically distributed above the material guide table, each buffer plate is distributed in parallel with the material guide table, one side of each buffer plate is vertically connected with a guide plate, the suckers are stretched in the connecting columns through a slide rod, the side ends of the slide rods are vertically connected with a guide rod, the guide rods are arranged to penetrate towards one side of the guide plates, and a chute for the guide rods to move in is formed in each guide plate;

the chute integrally extends along the length direction of the machine body and comprises an ascending part, a translation part and a descending part, wherein the ascending part extends upwards in an inclined manner from one side of the machine body, the translation part extends from one side of the ascending part to the direction of the transfer trolley and keeps consistent with the length direction of the machine body, the descending part is arranged at one side of the translation part and is arranged in an inclined manner downwards, and two buffer plates are respectively provided with an empty groove corresponding to the ascending part;

translation portion is equipped with two archs that are domes, the arch is arched up and is set up with the middle part symmetry of translation portion up, still is equipped with a volume and glues the subsides on being located the organism, glue and paste and can move to protruding department when moving up at the guide bar, order about the collection board and shift up, the collection board shifts up the in-process and glues the upper end of pasting the laminating at the collection board.

2. The semi-automatic pallet loading device according to claim 1, wherein a plurality of rollers are rotatably mounted on two of the buffer plates corresponding to the translation portions, and the rollers are vertically arranged at one ends of the buffer plates facing the pallet loading plate.

3. The semi-automatic pallet stacking device of claim 1, wherein a hot knife is provided on one side of the roll of adhesive tape, and a cutting surface of the hot knife is opposite to the moving direction of the pallet.

4. A semi-automatic pallet plate palletizing device as in claim 1, characterized in that: the whole material of gluing is for having elastic plastic pad, and its one end covers has the viscose and sets up towards the collection dress board direction.

5. A semi-automatic pallet stacking apparatus according to claim 1 wherein the guide track comprises:

fixing a rail;

the movable rail is arranged above the transfer trolley and is rotatably arranged on the side surface of the fixed rail;

the two sections of the steering grooves are respectively positioned on the fixed rail and the movable rail.

6. A pallet stacking method for use with a semi-automatic pallet stacking apparatus as claimed in any one of claims 1 to 5, comprising the steps of:

step 1: moving the riveted finished product assembling plate to the machine body, and adsorbing the riveting finished product assembling plate on the upper end surface of the assembling plate by using a sucking disc arranged on the machine body to move towards the other side direction of the machine body;

step 2: in the moving process of the collecting plate, the collecting plate firstly rotates to a certain extent to drive the collecting plate to move along the length direction of the machine body in an inclined manner until the collecting plate reaches the position right below an empty groove arranged between the two buffer plates, and at the moment, the collecting plate is enabled to move upwards and penetrate through the empty groove to reach the upper end of the buffer plate;

and step 3: the container plate is continuously moved to the direction of the transfer trolley, and two pieces of glue paste are pasted at the upper end of the container plate;

and 4, step 4: when the container plates reach the upper part of the transfer trolley, the placing angles of the upper and lower container plates are different by adjusting the angles of the container plates, and when the container plates on the transfer trolley are stacked to a certain height, the transfer trolley is driven to leave the machine body.

Images