CN212953107U - Push-pull device and stacker - Google Patents

Abstract

The embodiment of the utility model provides a push-and-pull device and stacker relates to PC component production field, and this push-and-pull device includes first drive wheel, second drive wheel, driving motor, push-and-pull piece and organism, and first drive wheel and second drive wheel are all installed on driving motor's output shaft, and push-and-pull piece slidable ground is connected in the organism, and driving motor movably connects in the organism to switch between first state and second state. In the first state, the first driving wheel acts on the die table to drive the die table to move when the driving motor is started. In the second state, the first driving wheel is separated from the die table, the push-pull piece is abutted to the die table, and the second driving wheel acts on the push-pull piece so as to drive the push-pull piece to slide relative to the machine body when the driving motor is started, and the die table moves under the pushing of the push-pull piece. The stacker comprises the push-pull device. The push-pull device and the stacker have the advantages of being simple in structure and low in manufacturing cost.

Description

Push-pull device and stacker

Technical Field

The utility model relates to a PC component production field particularly, relates to a push-and-pull device and stacker.

Background

In the production line of PC components, the grapple piler is mainly used for lifting a mould platform and transporting the mould platform, the components are placed in the mould platform, the grapple piler lifts the mould platform and then conveys the mould platform into a curing kiln, and the components in the mould platform are cured in the curing kiln. Generally, a grapple stacker includes a lifting frame, a drive wheel, and a push-pull mechanism, both of which are mounted on the lifting frame. In the process of conveying the mold table into the curing kiln, the driving wheel firstly contacts with the mold table and conveys the mold table to a preset position, when the mold table reaches the preset position, one part of the mold table extends into the curing kiln, and the other end part of the mold table is hung outside the curing kiln. At the moment, the lifting frame can not enter the curing kiln, and the driving wheel is separated from the die table and can not continue to provide power. Therefore, after the mold table reaches the preset position, the push-pull mechanism acts on the mold table, and the mold table is gradually pushed into the curing kiln in the process that the push-pull mechanism moves relative to the lifting frame.

In the prior art, two sets of different power systems are respectively used for the driving wheel and the push-pull mechanism, so that the whole structure is complex and the manufacturing cost is high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a push-and-pull device and stacker, it can improve the above-mentioned technical problem who mentions effectively.

The embodiment of the utility model is realized like this:

in a first aspect, an embodiment of the present invention provides a push-pull device, including a first driving wheel, a second driving wheel, a driving motor, a push-pull member, and a machine body, where the first driving wheel and the second driving wheel are both mounted on an output shaft of the driving motor, the push-pull member is slidably connected to the machine body, and the driving motor is movably connected to the machine body, so that the first driving wheel and the second driving wheel move relative to the machine body to switch between a first state and a second state;

in the first state, the second driving wheel is separated from the push-pull piece, and the first driving wheel acts on the die table to drive the die table to move when the driving motor is started;

in the second state, the first driving wheel is separated from the die table, the push-pull piece abuts against the die table, the second driving wheel acts on the push-pull piece so as to drive the push-pull piece to slide relative to the machine body when the driving motor is started, and the die table moves under the pushing of the push-pull piece.

In an alternative embodiment, the first drive wheel is coaxially disposed with the second drive wheel, and the second drive wheel has an outer diameter smaller than the outer diameter of the first drive wheel.

In an alternative embodiment, one side of the machine body is provided with a transportation space for transporting the die table, and the first driving wheel is close to the transportation space relative to the second driving wheel.

In an alternative embodiment, the push-pull device further comprises a base, the driving motor is mounted on the base, and the base is movably connected to the body to switch between the first state and the second state.

In an alternative embodiment, the base includes a first end and a second end disposed opposite to each other, and the second end is rotatably connected to the body;

the push-pull device further comprises a spring, one end of the spring is connected with the first end, the other end of the spring is connected with the machine body, the spring is compressed or stretched when the die table abuts against the first driving wheel, so that the base rotates relative to the machine body along a preset direction, and after the die table is separated from the first driving wheel, the spring drives the base to rotate relative to the machine body along a direction opposite to the preset direction through restoring force, so that the second driving wheel acts on the push-pull piece.

In an optional embodiment, the body is provided with a support lug, the support lug is provided with a through hole, the push-pull device further comprises a screw rod and a nut, the screw rod penetrates through the through hole and is connected with the first end, the nut is in threaded fit with the screw rod, the spring is sleeved on the screw rod, and two ends of the spring are respectively abutted to the nut and the support lug.

In an optional embodiment, the push-pull device further includes a slide rail, the slide rail is mounted on the machine body, and the push-pull member is in sliding fit with the slide rail.

In an optional implementation manner, a protruding plate is arranged on the pushing and pulling member, the protruding plate is arranged outside the sliding rail in a protruding manner, a gap is formed between the second driving wheel and the protruding plate in the first state, and the second driving wheel is pressed against the protruding plate in the second state.

In an alternative embodiment, the push-pull member includes a mounting plate, a tubular motor, and a butting block, the mounting plate is slidably fitted to the slide rail, the tubular motor is mounted on the mounting plate, the butting block is mounted on an output shaft of the tubular motor, and the butting block is configured to abut against or separate from the mold table under the action of the tubular motor.

In a second aspect, an embodiment of the present invention provides a stacker, including the push-pull device of any one of the foregoing embodiments.

The utility model discloses beneficial effect includes, for example:

the embodiment of the utility model provides a push-pull device, this push-pull device include first drive wheel, second drive wheel, driving motor, push-and-pull piece and organism, and first drive wheel and second drive wheel are all installed on driving motor's output shaft, and driving motor starts the back, can drive first drive wheel and second drive wheel simultaneously and rotate. The driving motor is movably connected to the machine body, so that in the process that the driving motor moves relative to the machine body, the first driving wheel and the second driving wheel can also move relative to the machine body along with the driving motor, and therefore the first state and the second state are switched. Under first state, first drive wheel acts on the mould platform, and driving motor starts the back, and first drive wheel can drive the mould platform and remove for the mould platform removes towards the maintenance kiln. When the mold table is conveyed to the preset position, the first driving wheel is separated from the mold table, the first driving wheel cannot continuously drive the mold table to move, at the moment, one part of the mold table is located in the curing kiln, and the other part of the mold table is hung outside the curing kiln. Then, the whole of the driving motor is moved relative to the machine body, the whole of the first driving wheel and the second driving wheel is moved relative to the machine body, and the first state is switched to the second state. At the moment, the push-pull piece is abutted to the mold table, the second driving wheel acts on the push-pull piece, the driving motor is still in a starting state, the second driving wheel drives the push-pull piece to move, and the mold table can be pushed to completely enter the curing kiln in the process that the push-pull piece moves relative to the machine body. It can be understood that the first driving wheel and the second driving wheel share the same driving motor, so that the function of completely conveying the die table into the curing kiln can be realized. The push-pull device is simple in overall structure and low in manufacturing cost.

The embodiment of the utility model provides a stacker is still provided, and this stacker includes the aforementioned push-and-pull device that mentions to possess this push-and-pull device's whole functions. The stacker also has the beneficial effects of simple structure and low manufacturing cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a push-pull device and a mold table according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a push-pull device according to an embodiment of the present invention.

Icon: 1-a push-pull device; 11-a first drive wheel; 12-a second drive wheel; 13-a drive motor; 14-a push-pull member; 141-a mounting plate; 142-a tubular motor; 143-abutment blocks; 144-a card slot; 15-organism; 16-a transportation space; 17-a base; 171-a first end; 172-second end; 18-a spring; 19-a lug; 20-a screw; 21-a nut; 22-a slide rail; 23-a convex plate; 24-a guide wheel; and 3-die table.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

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

Referring to fig. 1 and 2, the present embodiment provides a push-pull device 1, the push-pull device 1 includes a first driving wheel 11, a second driving wheel 12, a driving motor 13, a push-pull member 14, and a body 15, wherein the first driving wheel 11 and the second driving wheel 12 are both mounted on an output shaft of the driving motor 13. Thus, after the driving motor 13 is started, the first driving wheel 11 and the second driving wheel 12 can be driven to rotate simultaneously.

In addition, it should be noted that in the present embodiment, the driving motor 13 is movably connected to the machine body 15, so that during the movement of the driving motor 13 relative to the machine body 15, the first driving wheel 11 and the second driving wheel 12 can also move relative to the machine body 15 along with the driving motor 13.

It should be noted that, while the first driving wheel 11 and the second driving wheel 12 move relative to the machine body 15, they can be switched between the first state and the second state.

Specifically, in the first state, the second driving wheel 12 is disengaged from the pushing and pulling member 14, the first driving wheel 11 acts on the mold table 3, and after the driving motor 13 is started, the first driving wheel 11 can drive the mold table 3 to move, so that the mold table 3 moves towards the curing kiln.

When the mold table 3 is conveyed to the preset position, the mold table 3 is separated from the first driving wheel 11, and the first driving wheel 11 cannot drive the mold table 3 to move continuously. At this time, a part of the mold table 3 is located inside the curing kiln, and the other part of the mold table 3 is suspended outside the curing kiln.

Then, the entire drive motor 13 is moved relative to the machine body 15, the first drive wheel 11 and the second drive wheel 12 follow the drive motor 13 to move relative to the machine body 15, and the first state is switched to the second state.

In the second state, the push-pull member 14 abuts against the mold table 3, the second driving wheel 12 acts on the push-pull member 14, the driving motor 13 is still in the starting state, the second driving wheel 12 drives the push-pull member 14 to move, and the mold table 3 can be pushed to completely enter the curing kiln in the process that the push-pull member 14 moves relative to the machine body 15.

It is understood that in the present embodiment, the first driving wheel 11 and the second driving wheel 12 share the same driving motor 13, and the function of completely feeding the mold table 3 into the curing kiln can be realized. The push-pull device 1 is simple in overall structure and low in manufacturing cost.

It should be noted that the foregoing describes the process in which the mold table 3 is conveyed into the curing kiln. In actual use, the process of carrying the die table 3 out of the curing kiln is reversed from the foregoing process. That is, in the second state, the pushing and pulling member 14 abuts against the die table 3, the second driving wheel 12 first drives the pushing and pulling member 14 to move relative to the machine body 15, and the pushing and pulling member 14 pulls the die table 3 to contact with the first driving wheel 11 in the process that the pushing and pulling member 14 moves relative to the machine body 15. The second state is switched to the first state, the driving motor 13 keeps the starting state, and the first driving wheel 11 drives the mold table 3 to be completely separated from the curing kiln.

Referring to fig. 1 and fig. 2, in the present embodiment, the push-pull device 1 further includes a base 17, the driving motor 13 is mounted on the base 17, and the base 17 is movably connected to the machine body 15.

It will be appreciated that when the base 17 is moved relative to the body 15, the drive motor 13 mounted on the base 17 will also move relative to the body 15 to effect switching between the first and second states.

Specifically, in the present embodiment, the base 17 includes a first end 171 and a second end 172 disposed opposite to each other, and the second end 172 is rotatably connected to the body 15. Thus, during the rotation of the base 17 relative to the body 15, the driving motor 13 mounted on the base 17 also rotates relative to the body 15.

It should be noted that in other embodiments, the base 17 may be slidably connected to the body 15.

Referring to fig. 1 and 2, in the present embodiment, the body 15 is provided with a support lug 19, the support lug 19 is provided with a through hole (not shown in the figure), the push-pull device 1 further includes a spring 18, a screw 20 and a nut 21, the screw 20 passes through the through hole and is connected with the first end 171, the nut 21 is in threaded fit with the screw 20, the spring 18 is sleeved on the screw 20, and two ends of the spring 18 are respectively abutted against the nut 21 and the support lug 19.

In the first state, the die table 3 is placed on the first driving wheel 11, the base 17 rotates relative to the machine body 15 along the preset direction due to the gravity of the die table 3, the screw 20 is driven by the base 17, and the spring 18 is compressed under the combined action of the nut 21 and the support lug 19.

In the second state, the mould table 3 is disengaged from the first driving wheel 11, and the bottom wall of the curing kiln plays a main bearing role for the mould table 3. After the mold table 3 is disengaged from the first driving wheel 11, the base 17 can rotate relative to the machine body 15 in the direction opposite to the preset direction due to the restoring force of the spring 18, so that the second driving wheel 12 acts on the push-pull member 14 to prepare for the subsequent further conveying of the mold table 3.

It should be noted that, in the present embodiment, the preset direction is a direction indicated by an arrow a in fig. 2, and a direction opposite to the preset direction is a direction indicated by an arrow B in fig. 2.

In other embodiments, one end of the spring 18 may be directly connected to the first end 171 of the base 17, and the other end of the spring 18 may be directly connected to the lug 19. At this time, the spring 18 is located between the base 17 and the lug 19, and in the first state, the spring 18 can be also stretched when the die table 3 is placed on the first driving wheel 11.

In practical applications, the supporting lug 19 may be integrally formed with the machine body 15, and the supporting lug 19 may be a part of the machine body 15. Alternatively, the support lug 19 may be welded or bonded to the body 15.

Referring to fig. 1 and fig. 2, in the present embodiment, the first driving wheel 11 and the second driving wheel 12 are coaxially disposed, and an outer diameter of the second driving wheel 12 is smaller than an outer diameter of the first driving wheel 11. Thus, in the first state, after the mold table 3 is placed on the first driving wheel 11, the second driving wheel 12 does not contact with the mold table 3, and the process of driving the mold table 3 by the first driving wheel 11 is not affected.

The term "coaxially disposed" means that the axis of the first drive wheel 11, the axis of the second drive wheel 12, and the axis of the output shaft of the drive motor 13 are collinear.

Referring to fig. 1 and 2, in the present embodiment, a transportation space 16 for transporting the mold base 3 is provided at one side of the machine body 15, and the first driving wheel 11 is close to the transportation space 16 relative to the second driving wheel 12. Thus, in the placing process, the second driving wheel 12 does not influence the placing process of the die table 3, and the die table 3 is more conveniently placed on the first driving wheel 11.

Referring to fig. 1 and fig. 2, in the present embodiment, the push-pull device 1 further includes a slide rail 22, the slide rail 22 is installed on the machine body 15, and the push-pull member 14 is slidably engaged with the slide rail 22. In this way, the slide rail 22 can guide the movement of the push-pull device 1.

Specifically, in the present embodiment, the push-pull member 14 includes a mounting plate 141, a tubular motor 142, and an abutment block 143, the mounting plate 141 is slidably fitted to the slide rail 22, the tubular motor 142 is mounted on the mounting plate 141, and the abutment block 143 is mounted on an output shaft of the tubular motor 142. The abutting block 143 is adapted to abut against the mold table 3 or to be separated from the mold table 3 by the tubular motor 142.

Specifically, in the second state, the tubular motor 142 is started, the abutment block 143 rotates following the output shaft of the tubular motor 142, the abutment block 143 rotates to a position in abutment with the mold table 3, and then the mounting plate 141 moves relative to the machine body 15 following, thereby pushing the mold table 3 into or out of the curing kiln. It will be appreciated that when it is desired to push the mould table 3 into the curing kiln, the abutment blocks 143 abut against the side walls of the mould table 3 located outside the curing kiln. When the mold base 3 needs to be pushed out of the curing kiln, the abutment block 143 abuts against the side wall of the mold base 3 located inside the curing kiln.

Please refer to fig. 1 and 2, in the embodiment, an L-shaped slot 144 is disposed on the mounting plate 141, and the tubular motor 142 is embedded in the slot 144. In the second state, the abutment block 143 is rotated out of the engaging groove 144 to abut against the die table 3. In the first state, the abutting block 143 is rotated into the engaging groove 144, which can save space.

Referring to fig. 1 and fig. 2, in the present embodiment, the mounting plate 141 is provided with a convex plate 23, and the convex plate 23 is convexly disposed outside the slide rail 22.

In the first state, a gap is provided between the second drive wheel 12 and the flange 23, and the second drive wheel 12 does not act on the flange 23, that is, the second drive wheel 12 is in an idle state. In the second state, the second driving wheel 12 abuts against the convex plate 23, so that in the process of rotating the second driving wheel 12, because of the friction between the second driving wheel 12 and the convex plate 23, the second driving wheel 12 can drive the convex plate 23 to move relative to the machine body 15, so as to drive the mounting plate 141, the tubular motor 142 and the abutting block 143 to move relative to the machine body 15, and further push the mold table 3.

It should be noted that, in other embodiments, the convex plate 23 and the second driving wheel 12 may also be in a rack-and-pinion matching structure.

In practical applications, the protruding plate 23 and the mounting plate 141 may be integrally formed, or may be welded or bonded to each other.

Referring to fig. 1 and 2, in the present embodiment, the push-pull device 1 further includes a guide wheel 24, the guide wheel 24 is rotatably mounted on the body 15, and in the first state, the mold table 3 is placed on the first driving wheel 11, and the guide wheel 24 and the first driving wheel 11 simultaneously bear the mold table 3. The guide wheel 24 is rotatable relative to the body 15 and assists the first drive wheel 11 in conveying the die table 3.

The embodiment also provides a stacker comprising the push-pull device 1. Generally, in the same stacker, the number of the push-pull devices 1 is plural, and the plural push-pull devices 1 simultaneously perform the conveying work on the die table 3, so that the conveying efficiency of the die table 3 is improved, and the stability of the die table 3 during the conveying can be maintained. For example: in practical application, two opposite push-pull devices 1 can be arranged, the mould table 3 is positioned between the two push-pull devices 1, and the two push-pull devices 1 simultaneously convey the mould table 3. It should be noted that, in practical applications, the stacker may further include a frame, a lifting device, and other components.

In summary, the working principle of the push-pull device 1 provided by the present embodiment is as follows:

in the first state, the mold table 3 is located in the transportation space 16, the mold table 3 is placed on the first driving wheel 11, the first driving wheel 11 and the driving motor 13 both move downwards due to the gravity action of the mold table 3, at this time, the base 17 rotates relative to the machine body 15 along the preset direction, the screw rod 20 is driven by the base 17, and the spring 18 is compressed under the combined action of the nut 21 and the support lug 19. The driving motor 13 is started, the first driving wheel 11 acts on the mould table 3 and drives the mould table 3 to move by means of friction force.

When the mold table 3 is moved to the preset position, the first driving wheel 11 is separated from the mold table 3, the first driving wheel 11 cannot continuously drive the mold table 3 to move, at the moment, one part of the mold table 3 is located in the curing kiln, and the other part of the mold table 3 is hung outside the curing kiln.

After the first driving wheel 11 is disengaged from the die table 3, the base 17 can rotate relative to the machine body 15 in the direction opposite to the preset direction under the action of the restoring force of the spring 18, so that the second driving wheel 12 is pressed against the convex plate 23. The first state is switched to the second state.

In the second state, the tubular motor 142 is started, the abutment block 143 rotates following the output shaft of the tubular motor 142, and the abutment block 143 rotates out of the catch groove 144 and abuts on the die table 3. At this time, the driving motor 13 continues to work, and the second driving wheel 12 drives the protruding plate 23 to move relative to the machine body 15, so as to drive the mounting plate 141, the tubular motor 142 and the abutting block 143 to move relative to the machine body 15, thereby pushing the die table 3. Finally, the mold table 3 is pushed completely into the curing kiln.

The above description is only exemplary of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A push-pull device, characterized by comprising a first driving wheel (11), a second driving wheel (12), a driving motor (13), a push-pull member (14) and a machine body (15), wherein the first driving wheel (11) and the second driving wheel (12) are both mounted on an output shaft of the driving motor (13), the push-pull member (14) is slidably connected to the machine body (15), and the driving motor (13) is movably connected to the machine body (15) such that the first driving wheel (11) and the second driving wheel (12) move relative to the machine body (15) to switch between a first state and a second state;

in the first state, the second driving wheel (12) is separated from the push-pull piece (14), and the first driving wheel (11) acts on the die table (3) to drive the die table (3) to move when the driving motor (13) is started;

in the second state, the first driving wheel (11) is separated from the die table (3), the push-pull piece (14) abuts against the die table (3), the second driving wheel (12) acts on the push-pull piece (14) to drive the push-pull piece (14) to slide relative to the machine body (15) when the driving motor (13) is started, and the die table (3) moves under the pushing of the push-pull piece (14).

2. Push-pull device according to claim 1, characterised in that the first drive wheel (11) is arranged coaxially with the second drive wheel (12), and that the outer diameter of the second drive wheel (12) is smaller than the outer diameter of the first drive wheel (11).

3. Push-pull device according to claim 2, characterised in that one side of the machine body (15) is provided with a transport space (16) for transporting the mould table (3), the first drive wheel (11) being located close to the transport space (16) with respect to the second drive wheel (12).

4. Push-pull according to any one of claims 1-3, characterised in that the push-pull (1) further comprises a base (17), the drive motor (13) being mounted on the base (17), the base (17) being movably connected to the body (15) for switching between the first state and the second state.

5. Push-pull device according to claim 4, characterised in that the base (17) comprises a first end (171) and a second end (172) arranged opposite each other, the second end (172) being rotatably connected to the body (15);

the push-pull device (1) further comprises a spring (18), one end of the spring (18) is connected with the first end (171), the other end of the spring (18) is connected with the machine body (15), the spring (18) is compressed or stretched under the condition that the die table (3) presses the first driving wheel (11) to enable the base (17) to rotate relative to the machine body (15) along a preset direction, and after the die table (3) is separated from the first driving wheel (11), the spring (18) drives the base (17) to rotate relative to the machine body (15) along the direction opposite to the preset direction through restoring force, so that the second driving wheel (12) acts on the push-pull piece (14).

6. Push-pull device according to claim 5, characterized in that the body (15) is provided with a support lug (19), the support lug (19) is provided with a through hole, the push-pull device (1) further comprises a screw (20) and a nut (21), the screw (20) passes through the through hole and is connected with the first end (171), the nut (21) is in threaded fit with the screw (20), the spring (18) is sleeved on the screw (20), and two ends of the spring (18) are respectively abutted against the nut (21) and the support lug (19).

7. A push-pull device according to any one of claims 1-3, characterised in that the push-pull device (1) further comprises a slide rail (22), the slide rail (22) being mounted on the body (15), the push-pull member (14) being in sliding engagement with the slide rail (22).

8. Push-pull device according to claim 7, characterized in that the push-pull member (14) is provided with a protruding plate (23), the protruding plate (23) being arranged protruding outside the slide rail (22), in that in the first state a gap is provided between the second driving wheel (12) and the protruding plate (23), and in that in the second state the second driving wheel (12) is pressed against the protruding plate (23).

9. Push-pull device according to claim 7, characterized in that the push-pull member (14) comprises a mounting plate (141), a tubular motor (142) and an abutment block (143), the mounting plate (141) being in sliding engagement with the slide rail (22), the tubular motor (142) being mounted on the mounting plate (141), the abutment block (143) being mounted on an output shaft of the tubular motor (142), the abutment block (143) being adapted to abut against the mould table (3) or to be disengaged from the mould table (3) under the action of the tubular motor (142).

10. A stacker crane comprising a push-pull device (1) according to any of claims 1-9.

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