CN217370710U - Feeding mechanism and plate shearing machine - Google Patents

Abstract

The utility model discloses a feed mechanism and plate shearing machine, including workstation, first feeding mechanism and second feeding mechanism, be provided with on the workstation and place the station and wait to process the station, place the station with wait to process the station coplane not, just place the level of station and be higher than wait to process the level of station, wait to process and install the lift cylinder on the station, the lifter plate is installed to the drive end of lift cylinder, the lift cylinder be suitable for with the lifter plate lifting extremely with place the station horizontally position, this feed mechanism and plate shearing machine can avoid the material loading in-process, panel and the feeding mechanism collision of installing on the workstation.

Description

Feeding mechanism and plate shearing machine

Technical Field

The utility model relates to a plate shearing machine technical field especially relates to a feed mechanism and plate shearing machine.

Background

A plate shearing machine is a machine for shearing a plate by using a blade to do reciprocating linear motion relative to another blade. The metal plates with various thicknesses are applied with shearing force by a reasonable blade gap through a movable upper blade and a fixed lower blade, so that the plates are broken and separated according to the required size. A plate shearing machine belongs to one of forging and pressing machines and mainly plays a role in the metal processing industry.

The existing plate shearing machine is convenient and automatic, plates are generally transported to a workbench of the plate shearing machine by utilizing a sucker, then the plates are pushed into the plate shearing machine by utilizing a manipulator installed on the workbench to be cut, and the plates are easily collided with the manipulator to cause damage in the process that the plates are transported to the workbench of the plate shearing machine by the sucker.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a feeding mechanism, which can avoid the collision of a plate and a feeding mechanism arranged on a workbench in the feeding process.

The utility model discloses an one of the purpose adopts following technical scheme to realize:

a feed mechanism, comprising:

the device comprises a workbench, wherein a placing station and a station to be processed are arranged on the workbench, the placing station and the station to be processed are not coplanar, the horizontal height of the placing station is higher than that of the station to be processed, a lifting cylinder is arranged on the station to be processed, a lifting plate is arranged at the driving end of the lifting cylinder, and the lifting cylinder is suitable for lifting the lifting plate to a position horizontal to the placing station;

the first feeding mechanism comprises a first feeding driving unit, a material taking unit and a pushing unit, wherein the material taking unit and the pushing unit are installed at the driving end of the first feeding driving unit, the first feeding driving unit is suitable for driving the material taking unit and the pushing unit to reciprocate between the placing station and the station to be processed, the material taking unit is suitable for adsorbing a plate and moving the plate to the placing station under the driving of the first feeding driving unit, and the pushing unit is suitable for pushing the plate on the placing station to the station to be processed under the driving of the first feeding driving unit;

and the second feeding mechanism is arranged on the workbench and is suitable for pushing the plate on the station to be processed to the plate shearing machine.

Further, get the material unit including get the material cylinder and install in get the sucking disc of material cylinder drive end.

Further, the pushing unit comprises a pushing cylinder and a pushing plate arranged at the driving end of the pushing cylinder.

Furthermore, the second feeding mechanism comprises a second feeding driving unit and a clamping jaw mounted at the driving end of the second feeding driving unit, and the second feeding driving unit is suitable for driving the clamping jaw to move towards or away from the direction of the plate shearing machine, so that the clamping jaw can push the plate on the station to be machined to the plate shearing machine.

Further, the clamping jaw includes clamping jaw drive cylinder, first clamping part and second clamping part, the middle part of first clamping part with the second clamping part is articulated, clamping jaw drive cylinder's drive end with the one end of first clamping part is connected, in order to be suitable for the drive first clamping jaw part is relative the second clamping part swings, and makes the other end of first clamping part with the second clamping part butt is with centre gripping panel.

Further, a waste pushing cylinder is installed on the side face of the clamping jaw.

Further, still include the lift platform that is used for placing panel.

Further, the workstation both sides are provided with first limiting plate.

The second purpose of the utility model is realized by adopting the following technical scheme:

a plate shearing machine comprises the feeding mechanism.

The blanking mechanism comprises a guide plate, a storage bin and a bin dividing device, the guide plate is obliquely arranged with the horizontal plane, the highest end of the guide plate is arranged at the discharge end of the plate shearing machine, the storage bin comprises a first bin and a second bin, the first bin is arranged below the lowest end of the guide plate, the second bin is arranged on one side, away from the guide plate, of the first bin, the first bin and the second bin are different in size and suitable for containing plates of different specifications, the bin dividing device comprises a movable plate and a movable plate driving unit, the movable plate is slidably arranged on the guide plate and suitable for sliding from the highest end of the guide plate to the lowest end of the guide plate and can extend out of the guide plate when sliding to the lowest end of the guide plate to be arranged above the second bin, and the movable plate driving unit is suitable for driving the movable plate to reciprocate between the highest end and the lowest end of the guide plate.

Compared with the prior art, the beneficial effects of the utility model reside in that:

this application is through placing the station and waiting to process the station setting in different planes to place the station and place on being higher than the position of waiting to process the station, in order to avoid panel to move to waiting to process the station from placing the station, with install the second feeding mechanism in waiting to process the station and bump, lead to panel or second feeding mechanism to harm, influence panel transportation, the lifter plate and the lift cylinder that set up of deuterogamying, in order can with place the station with transport to be in not co-altitude with treat on the station.

Drawings

Fig. 1 is a schematic structural view of a feeding mechanism of the present invention;

fig. 2 is a schematic structural view of the lifting platform and the first feeding mechanism of the present invention;

FIG. 3 is a schematic view of the structure of FIG. 2 with the lifter plate removed;

fig. 4 is a schematic structural view of the first feeding mechanism of the present invention;

fig. 5 is a schematic structural view of a pushing unit of a feeding mechanism of the present invention;

fig. 6 is a schematic structural view of a second feeding mechanism of the present invention;

fig. 7 is a schematic structural view of a clamping jaw of the feeding mechanism of the present invention;

fig. 8 is a schematic structural view of a plate shearing machine according to the present invention;

fig. 9 is a partial cross-sectional view of a plate shearing machine according to the present invention;

fig. 10 is a cross-sectional view of a plate shearing machine according to the present invention;

fig. 11 is a schematic structural view of the blanking mechanism of the plate shearing machine of the present invention;

FIG. 12 is an enlarged view taken at A in FIG. 11;

the figure is as follows: 1. a work table; 101. placing a station; 102. a station to be processed; 103. a lifting cylinder; 104. a lifting plate; 105. a first limit plate; 2. a first feeding mechanism; 201. a first feeding drive unit; 202. a material taking unit; 2021. a material taking cylinder; 2022. a suction cup; 203. a pushing unit; 2031. a push cylinder; 2032. pushing the plate; 3. a second feeding mechanism; 301. a second feeding drive unit; 302. a clamping jaw; 3021. the clamping jaw drives the cylinder; 3022. a first clamping portion; 3023. a second clamping portion; 3024. a waste pushing cylinder; 4. a lifting platform; 5. a plate shearing machine; 6. a blanking mechanism; 601. a guide plate; 6011. a mounting seat; 6012. a roller; 6013. a second limiting plate; 602. a storage bin; 6021. a first bin; 6022. a second bin; 6023. a storage bin slide rail; 603. a bin dividing device; 6031. a movable plate; 6032. a movable plate driving unit; 604. a load bearing device; 6041. a material supporting plate; 6042. a cylinder; 605. a waste bin; 606. a guide rail.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

As shown in fig. 1 and 7, the utility model discloses a feeding mechanism, include:

the machining device comprises a workbench 1, wherein a placing station 101 and a to-be-machined station 102 are arranged on the workbench 1, the placing station 101 and the to-be-machined station 102 are not coplanar, the horizontal height of the placing station 101 is higher than that of the to-be-machined station 102, a lifting cylinder 103 is arranged on the to-be-machined station 102, a lifting plate 104 is arranged at the driving end of the lifting cylinder 103, and the lifting cylinder 103 is suitable for lifting the lifting plate 104 to a position horizontal to the placing station 101;

the first feeding mechanism 2 comprises a first feeding driving unit 201, a material taking unit 202 and a pushing unit 203, the material taking unit 202 and the pushing unit 203 are installed at a driving end of the first feeding driving unit 201, the first feeding driving unit 201 is suitable for driving the material taking unit 202 and the pushing unit 203 to reciprocate between the placing station 101 and the station 102 to be processed, the material taking unit 202 is suitable for adsorbing a plate and moving the plate to the placing station 101 under the driving of the first feeding driving unit 201, and the pushing unit 203 is suitable for pushing the plate on the placing station 101 to the station 102 to be processed under the driving of the first feeding driving unit 201;

specifically, the material taking unit 202 comprises a material taking air cylinder 2021 and a suction cup 2022 mounted at the driving end of the material taking air cylinder 2021, and the pushing unit 203 comprises a pushing air cylinder 2031 and a pushing plate 2032 mounted at the driving end of the pushing air cylinder 2031;

and the second feeding mechanism 3 is arranged on the workbench 1 and is suitable for pushing the plate on the station 102 to be processed to the plate shearing machine 5.

In this embodiment, the first feeding driving unit 201 employs a transmission belt.

When the device is used, the material taking cylinder 2021 drives the suction cup 2022 to move towards the direction of a plate, so that the suction cup 2022 is in contact with the plate and adsorbs the plate, the material taking cylinder 2021 drives the suction cup 2022 to reset, then the first feeding and driving unit 201 drives the material taking unit 202 and the pushing unit 203 to move to the position above the placing station 101, the material taking cylinder 2021 is started to enable the suction cup 2022 to move towards the direction of the placing station 101 and place the plate on the placing station 101, then the first feeding and driving unit 201 drives the material taking unit 202 to reset, the material taking cylinder 2021 drives the suction cup 2022 to move towards the direction of the plate to adsorb the plate, meanwhile, the pushing cylinder 2031 is started to enable the pushing plate 2032 to move towards the direction of the workbench 1, then the first feeding and driving unit 201 drives the material taking unit 202 and the pushing unit 203 to move to the position above the placing station 101, in the process, the pushing plate 2032 is in contact with the side face of the plate in the placing station 101, so as to push the plate in the placing station 101 to the lifting plate 104, the lifting cylinder 103 contracts to transport the plate to the station 102 to be processed, and the second feeding mechanism 3 is started to push the plate in the station 102 to be processed to the plate shearing machine 5 for cutting.

This application is through placing station 101 and waiting to process the station 102 setting in different planes, and will place station 101 and place on being higher than waiting to process the position 102, in order to avoid panel from placing station 101 and removing when waiting to process station 102, with install the second feeding mechanism 3 collision in waiting to process station 102, lead to panel or the damage of second feeding mechanism 3, influence the panel transportation, the lifter plate 104 and the lift cylinder 103 that set up of deuterogamying, in order to transport panel to with place station 101 on the station 102 of waiting to process of co-altitude not.

Preferably, in the embodiment, the second feeding mechanism 3 includes a second feeding driving unit 301 installed on the station 102 to be processed, and a clamping jaw 302 installed at a driving end of the second feeding driving unit 301, and the second feeding driving unit 301 is adapted to drive the clamping jaw 302 to move towards or away from the plate shearing machine 5, so that the clamping jaw 302 can push the plate at the station 102 to be processed to the plate shearing machine 5.

In this embodiment, the second feeding driving unit 301 employs a conventional linear transmission mechanism, such as a screw.

In operation, the lifting plate 104 transports a plate to the station 102 to be processed, and then the second feeding driving unit 301 is activated to drive the clamping jaw 302 to move towards the plate shearing machine 5, so as to push the plate on the station 102 to be processed into the plate shearing machine 5.

Preferably, in the present embodiment, the clamping jaw 302 includes a clamping jaw driving cylinder 3021, a first clamping portion 3022 and a second clamping portion 3023, the middle portion of the first clamping portion 3022 is hinged to the second clamping portion 3023, and the driving end of the clamping jaw driving cylinder 3021 is connected to one end of the first clamping portion 3022, so as to drive the first clamping jaw 302 to swing relative to the second clamping portion 3023, and make the other end of the first clamping portion 3022 abut against the second clamping portion 3023 to clamp the plate material.

In operation, the clamping jaw driving cylinder 3021 drives the first clamping portion 3022 to move away from the second clamping portion 3023 to open the clamping jaw 302, then the second feeding driving unit 301 drives the clamping jaw 302 to move toward the plate shearing machine 5 until the plate is in contact with the clamping jaw 302, and the clamping jaw driving cylinder 3021 drives the first clamping portion 3022 to move toward the second clamping portion 3023 to close the clamping jaw 302, so as to clamp the plate, and prevent the plate shearing machine 5 from displacing during plate shearing.

Meanwhile, since the length of the remaining plate may not meet the use requirement after the plate is cut many times, in this embodiment, the waste material pushing cylinder 3024 is installed on the side surface of the clamping jaw 302, a gap is formed between the plate shearing machine 5 and the blanking mechanism 6, and the waste material pushing cylinder 3024 can push the waste material into the gap between the plate shearing machine 5 and the blanking mechanism 6 during operation.

Preferably, in order to facilitate loading, the present embodiment further includes a lifting platform 4 for placing the plates, and the lifting platform 4 can be raised according to the change of the number of the plates, so that the stroke from the material taking unit 202 to the lifting platform 4 is kept consistent.

Preferably, in order to guide the sheet material, the present application is further provided with first limit plates 105 at both sides of the table 1.

As shown in fig. 1-12, the present invention provides a plate shearing machine, which comprises the above feeding mechanism.

Preferably, the present embodiment further comprises a blanking mechanism 6, wherein the blanking mechanism 6 comprises a guide plate 601, a storage bin 602 and a bin dividing device 603, the guide plate 601 is disposed obliquely to the horizontal plane, and the highest end of the guide plate 601 is arranged at the discharge end of the plate shearing machine 5, the storage bin 602 comprises a first bin 6021 and a second bin 6022, the first bin 6021 is arranged below the lowest end of the guide plate 601, the second bin 6022 is arranged at one side of the first bin 6021 far away from the guide plate 601, the first bin 6021 and the second bin 6022 are different in size, for accommodating different specifications of plates, the binning device 603 comprises movable plates 6031 and movable plate driving units 6032, the movable plates 6031 are slidably mounted on the guiding plates 601, so as to be suitable for sliding from the highest end to the lowest end of the guide plate 601, and can extend out of the guide plate 601 when sliding to the lowest end, so as to be placed over the second chamber 6022, the movable plate driving unit 6032 is adapted to drive the movable plate 6031 to reciprocate between the uppermost end to the lowermost end of the guide plate 601.

When the blanking mechanism 6 is used, the blanking mechanism 6 is arranged at the discharge end of the plate shearing machine 5, the plate shearing machine 5 is provided with a sheared plate, the sheared plate falls to the guide plate 601 from the discharge end, and falls to the first bin 6021 positioned below the lowest end of the guide plate 601 along the guide plate 601, if necessary, the sheared plate falls to the second bin 6022, the movable plate driving unit 6032 drives the movable plate 6031 to move to the lowest end and extend out of the guide plate 601, at the moment, the tail end of the movable plate 6031 is positioned above the second bin 6022, and the sheared plate can slide to the second bin 6022 along the guide plate 601 and the movable plate 6031 for collection.

This application is through the branch storehouse device 603 and the cooperation of storage storehouse 602 that set up to can carry out classified storage to the panel of equidimension not, need not the manual work and sort.

In addition, for avoiding panel to take place the skew or break away from baffle 601 when sliding along baffle 601, this application still is provided with second limiting plate 6013 in baffle 601 both sides, and when panel slided along baffle 601, second limiting plate 6013 can block panel to the removal of restriction panel, thereby effectively avoids panel to take place the skew or break away from baffle 601 when sliding along baffle 601.

Meanwhile, for the convenience of the user to carry the cut plate, the storage bin 602 of the present invention further includes a storage bin slide rail 6023, the first bin 6021 and the first bin 6021 are slidably mounted on the storage bin slide rail 6023, and after the first bin 6021 or the second bin 6022 is fully stored, the user can push out the first bin 6021 or the second bin 6022 for carrying.

Preferably, in order to facilitate the transportation of the inner plates of the first and second bins 6021 and 6022 by a forklift, the bottoms of the first and second bins 6021 and 6022 are provided with side-opening slots for the forklift to extend into.

In addition, when a large plate needs to be cut out, the plate needs to be stretched into the plate shearing machine 5, and the plate shearing machine 5 is started to cut the plate until the length of the plate meets the use requirement. However, when the plate is cut, only the part of the plate which does not extend into the plate shearing machine 5 is supported by the feeding mechanism, and the part of the plate which extends into the plate shearing machine 5 does not have any support, so that when more plate extends into the plate shearing machine 5 than the plate which does not extend into the plate shearing machine 5, the plate is easy to bend under the action of gravity, and errors are easy to occur when the plate shearing machine 5 cuts the plate.

To the above problem, the utility model discloses in still including load-bearing device 604, specifically, load-bearing device 604 includes that holding in the palm flitch 6041 and holding in the palm flitch 6041 drive unit, and holding in the palm flitch 6041 one end is articulated with the highest point of baffle 601, and holding in the palm flitch 6041 drive unit is articulated with the free end that holds in the palm flitch 6041.

When the plate shearing machine is used, the retainer plate 6041 driving unit drives the free end of the retainer plate 6041 to swing to a position flush with the highest end of the guide plate 601, at the moment, the plate is stretched into the plate shearing machine 5, one end, stretching into the plate shearing machine 5, of the plate is abutted to the retainer plate 6041, and therefore the plate is supported, and the plate is prevented from being bent under the action of gravity.

Preferably, the movable plate driving unit 6032 in this application includes a cylinder 6042 installed at both sides of the guide plate 601, and a driving end of the cylinder 6042 can be connected with the movable plate 6031.

In addition, for making things convenient for panel to slide down along guide plate 601, reduce the frictional force between panel and the guide plate 601, this application still installs a plurality of gyro wheels 6012 on guide plate 601, and a plurality of gyro wheels 6012 are set up towards the lower extreme equidistance by the most advanced of guide plate 601.

Preferably, the guide plate 601 is provided with a mounting seat 6011, and a plurality of rollers 6012 are rotatably mounted on the mounting seat 6011, so that a contact surface between the guide plate 601 and the sheet material when the sheet material slides along the guide plate 601 is reduced by disposing the rollers 6012 on the mounting seat 6011, thereby facilitating rapid sliding of the sheet material.

In order to balance the stress, the mounting seat 6011 is provided in plural numbers, so that the plate does not contact the surface of the guide plate 601 when sliding along the guide plate 601, and the friction is small.

Meanwhile, in order to facilitate the discharge of waste materials, a gap is formed between the guide plate 601 and the plate shearing machine 5, and a waste bin 605 is arranged below the gap, so that the waste materials left by the plates can fall into the waste bin 605 along the gap to be collected when entering the plate shearing machine 5.

Meanwhile, in order to facilitate the user to take out the plate waste in the waste bin 605, the guide rail 606 is arranged below the waste bin 605, and the waste bin 605 is connected with the guide rail 606 in a sliding manner.

The utility model also discloses a plate shearing machine 5, which comprises a plate shearing machine 5 body, a guide plate 601, a storage bin 602 and a bin dividing device 603, wherein the guide plate 601 is obliquely arranged with the horizontal plane, and the highest end of the guide plate 601 is arranged at the discharge end of the plate shearing machine 5; the storage bin 602 comprises a first bin 6021 and a second bin 6022, the first bin 6021 is arranged below the lowest end of the guide plate 601, the second bin 6022 is arranged on the side of the first bin 6021 far away from the guide plate 601, and the first bin 6021 and the second bin 6022 are different in size so as to be suitable for containing plates with different specifications; the bin dividing device 603 includes a movable plate 6031 and a movable plate driving unit 6032, the movable plate 6031 is slidably mounted on the guide plate 601 to slide from the highest end to the lowest end of the guide plate 601 and can extend out of the guide plate 601 to be disposed above the second bin 6022 when sliding to the lowest end, and the movable plate driving unit 6032 is adapted to drive the movable plate 6031 to reciprocate between the highest end and the lowest end of the guide plate 601.

According to the sorting device, the arranged bin dividing devices 603 are matched with the storage bins 602, so that plates with different sizes can be sorted and stored without manual sorting; and when can tailor a panel, need not to stop the machine and can tailor into different sizes with panel to make full use of panel reduces the waste material and avoids extravagant, and cuts the waste material that gets off and can be according to the categorised storage of size.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims (10)

1. The utility model provides a feed mechanism which characterized in that:

the device comprises a workbench (1), wherein a placing station (101) and a station to be processed (102) are arranged on the workbench (1), the placing station (101) and the station to be processed (102) are not coplanar, the horizontal height of the placing station (101) is higher than that of the station to be processed (102), a lifting cylinder (103) is installed on the station to be processed (102), a lifting plate (104) is installed at the driving end of the lifting cylinder (103), and the lifting cylinder (103) is suitable for lifting the lifting plate (104) to a position horizontal to the placing station (101);

the first feeding mechanism (2) comprises a first feeding driving unit (201), a material taking unit (202) and a pushing unit (203), the material taking unit (202) and the pushing unit (203) are installed at the driving end of the first feeding driving unit (201), the first feeding driving unit (201) is suitable for driving the material taking unit (202) and the pushing unit (203) to reciprocate between the placing station (101) and the station (102) to be processed, the material taking unit (202) is suitable for adsorbing a plate and moving the plate to the placing station (101) under the driving of the first feeding driving unit (201), and the pushing unit (203) is suitable for pushing the plate on the placing station (101) to the station (102) to be processed under the driving of the first feeding driving unit (201);

and the second feeding mechanism (3) is arranged on the workbench (1) and is suitable for pushing the plate on the station (102) to be processed to the plate shearing machine (5).

2. A loading mechanism as claimed in claim 1, wherein: get material unit (202) including get material cylinder (2021) and install in get material cylinder (2021) drive end sucking disc (2022).

3. A loading mechanism as claimed in claim 1, wherein: the pushing unit (203) comprises a pushing cylinder (2031) and a pushing plate (2032) mounted at the driving end of the pushing cylinder (2031).

4. A loading mechanism as claimed in claim 1, wherein: the second feeding mechanism comprises a second feeding driving unit (301) and a clamping jaw (302) installed at the driving end of the second feeding driving unit (301), and the second feeding driving unit (301) is suitable for driving the clamping jaw (302) to move towards or away from the direction of the plate shearing machine (5), so that the clamping jaw (302) can push a plate on the station (102) to be machined to the plate shearing machine (5).

5. A loading mechanism as claimed in claim 4, wherein: the clamping jaw (302) comprises a clamping jaw driving cylinder (3021), a first clamping part (3022) and a second clamping part (3023), the middle of the first clamping part (3022) is hinged to the second clamping part (3023), the driving end of the clamping jaw driving cylinder (3021) is connected with one end of the first clamping part (3022) to be suitable for driving the clamping jaw (302) to swing relative to the second clamping part (3023), and the other end of the first clamping part (3022) is abutted to the second clamping part (3023) to clamp a plate material.

6. A loading mechanism according to claim 5, characterized in that: a waste pushing cylinder (3024) is arranged on the side surface of the clamping jaw (302).

7. A loading mechanism as claimed in claim 1, wherein: the device also comprises a lifting platform (4) for placing the plates.

8. A loading mechanism as claimed in claim 1, wherein: and first limiting plates (105) are arranged on two sides of the workbench (1).

9. A plate shearing machine characterized by comprising a feed mechanism according to any one of claims 1 to 8.

10. The plate shearing machine as set forth in claim 9, wherein: the blanking mechanism (6) comprises a guide plate (601), a storage bin (602) and a bin dividing device (603), the guide plate (601) is obliquely arranged with the horizontal plane, the highest end of the guide plate (601) is arranged at the discharging end of the plate shearing machine (5), the storage bin (602) comprises a first bin (6021) and a second bin (6022), the first bin (6021) is arranged below the lowest end of the guide plate (601), the second bin (6022) is arranged at one side of the first bin (6021) far away from the guide plate (601), the first bin (6021) and the second bin (6022) are different in size and are suitable for containing plates with different specifications, the bin dividing device (603) comprises a movable plate (6031) and a movable plate driving unit (6032), the movable plate (6031) is slidably arranged on the guide plate (601) and is suitable for sliding from the highest end to the lowest end of the guide plate (601), and can extend out of the guide plate (601) to be placed above the second magazine (6022) while sliding to the lowermost end, and the movable plate driving unit (6032) is adapted to drive the movable plate (6031) to reciprocate between the uppermost end and the lowermost end of the guide plate (601).

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