Receiving structure for plane presswork

Abstract

The utility model discloses a plane printed matter receiving structure which comprises an installation framework, an auxiliary mechanism is installed at one end of the installation framework, and a receiving mechanism is installed at the other end of the installation framework. The auxiliary mechanism comprises shifting plates, a conveying belt is mounted between the two shifting plates through a plurality of roll shafts, and a first hydraulic cylinder is movably connected between the two shifting plates and the mounting framework; the material receiving mechanism comprises a threaded rod used for lifting adjustment, the threaded rod is in threaded connection with a material receiving plate, a fixing frame is welded to the top of the mounting framework, positioning plates are fixedly arranged at the end and on the lower portions of the two sides of the fixing frame, and second hydraulic cylinders are fixedly arranged on the outer sides of the positioning plates. The output end of the second hydraulic cylinder is connected with an abutting plate located on the inner side of the positioning plate. By integrating cooperative work of the swing type auxiliary mechanism and the self-adaptive lifting material receiving mechanism, the problem of automatic material receiving of the plane printed matter is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to plane printing, more particularly to printed matter receiving, and relates to a plane printed matter receiving structure. BACKGROUND

[0002] With the continuous evolution of modern manufacturing towards automation and intelligence, the efficiency and quality control of each link in the production process have become key indicators for measuring the core competitiveness of enterprises. In the printing industry, especially in the production field of plane printed matter, the full-process automation from printing, detection to final receiving has become an important trend of technological development. Achieving efficient, clean and orderly automated receiving is not only a demand for improving the efficiency of a single process, but also a fundamental guarantee for breaking through the bottleneck of the entire production line, realizing continuous and large-scale production and ensuring the consistency of the quality of the final product.

[0003] Currently, for the receiving link of non-roll plane printed matter (such as single card, promotional page, special material label, etc.), the existing technical solutions mainly face the following challenges when dealing with large-scale and high-quality production needs:

[0004] Existing automated receiving mostly relies on roller winding, which is mainly suitable for flexible roll materials such as adhesive labels. For a large number of non-roll plane printed matter with certain rigidity, there is a lack of mature, stable and universal automated solutions, resulting in the end of the production line often degenerating into a manual receiving mode. This mode not only limits the high-speed production capacity of the front-end printing equipment, forming an "efficiency bottleneck" in the production process, but also brings high labor costs.

[0005] During the manual receiving process, the direct touch of the operator inevitably introduces contaminants such as fingerprints and sweat stains, especially for products with special surface coatings or high cleanliness requirements, which will directly lead to an increase in product failure rate. In addition, manual operation has uncertainties in stacking force, angle and position, making it difficult to ensure the uniformity of the quality of large quantities of product receiving, affecting the overall quality perception of the final product.

[0006] Even with manual receiving, it is quite difficult to quickly and neatly stack the high-speed output printed matter into a pile. The unevenly stacked material pile needs additional manual arrangement in subsequent processes such as transportation, counting, cutting or packaging, which not only increases the workload but also reduces the flow efficiency of the entire production chain. UTILITY MODEL CONTENTS

[0007] An object of the utility model is to provide a new technical solution for a plane printed matter receiving structure.

[0008] According to the first aspect of the utility model, a kind of plane printed matter receiving structure, including installation framework, one end of the installation framework movably installs auxiliary mechanism, another end of the installation framework is installed with receiving mechanism;

[0009] The auxiliary mechanism includes a toggle plate movably connected inside the installation framework, a transmission belt is installed between the two toggle plates by a plurality of roller shafts, one end of a first hydraulic cylinder is movably connected to the lower part of the two toggle plates, and the other end of the first hydraulic cylinder is movably connected inside the installation framework.

[0010] The receiving mechanism includes a threaded rod for lifting adjustment, a receiving plate is threadedly connected to the threaded rod, a fixed frame is welded to the top of the installation framework, positioning plates are fixedly arranged at the end and both sides of the fixed frame, a second hydraulic cylinder is fixedly arranged outside the positioning plates, and a stop plate is connected to the output end of the second hydraulic cylinder inside the positioning plates.

[0011] Further, the two ends of the roller shaft at one end are connected inside the installation framework, and the ends of the two toggle plates are movably connected to the ends of the roller shafts at the ends.

[0012] Further, a first rotating wheel is keyed to one side of the roller shaft at one end, a first mounting plate is welded to one side of the installation framework, a first servo motor is fixedly mounted on the first mounting plate, a second rotating wheel is keyed to the output shaft of the first servo motor, and a first transmission belt is drivingly connected to the first rotating wheel and the second rotating wheel.

[0013] Further, a horizontal plate is welded inside the installation framework, one end of the horizontal plate is in contact with one end of the transmission belt, and an adapter plate is mounted on the roller shaft at the other end.

[0014] Further, a plurality of positioning blocks are mounted on the two toggle plates, a positioning rod is mounted between the positioning blocks on both sides, the positioning rod is connected to a long rod through a hook, and a plurality of pressure covering wheels are movably mounted on the long rod.

[0015] Further, a first connecting head is fixedly arranged at the tail end of the first hydraulic cylinder, the first connecting head is movably connected inside the installation framework through a pin rod, a second connecting head is fixedly arranged at the lower part of the two toggle plates, a third connecting head is connected to the output end of the first hydraulic cylinder, and the third connecting head is movably connected to the second connecting head through a pin rod.

[0016] Further, the bottom end of the threaded rod is movably connected to the bottom of the installation framework, the top end of the threaded rod is movably connected to the lower part of the fixed frame, a support plate is welded inside the bottom of the installation framework, and the threaded rod penetrates the middle part of the support plate.

[0017] Further, the bottom of the mounting architecture is welded with a second mounting plate, one side of the second mounting plate is mounted with a second servo motor, the output shaft of the second servo motor is movably connected at the bottom of the mounting architecture, a third rotating wheel is keyed connected on the output shaft of the second servo motor, and a pressing wheel is mounted at one side of the second servo motor at the bottom of the mounting architecture.

[0018] Further, the bottom of the threaded rod is keyed connected with a fourth rotating wheel, and the third rotating wheel, the fourth rotating wheel and the pressing wheel are transmission connected with a second transmission belt.

[0019] Further, guide rods are fixed between the two ends of the supporting plate and the fixed frame, and the four corners of the receiving plate are movably connected with the guide rods.

[0020] The beneficial effects of the present application are as follows:

[0021] The present application realizes the full-process automation closed loop from material output to neat stacking through the integrated material receiving system constructed by the auxiliary mechanism and the material receiving mechanism working in cooperation.

[0022] The auxiliary mechanism realizes the stable receiving of the printed matter output from the production line through the lifting and swinging, the auxiliary mechanism is docked with the production line through the smooth swinging of the first hydraulic cylinder, and the printed matter is placed on the receiving plate, so that the active guidance and placement are realized, and the problems of impact, deviation and material damage during high-speed discharging are fundamentally solved.

[0023] The material receiving mechanism realizes the real-time and accurate automatic descending according to the thickness of the stacked material through the threaded rod driven by the second servo motor, always maintains the small and constant drop between the receiving plate and the end of the auxiliary mechanism, ensures that each material can be placed gently, and aligns the printed matter after each receiving through the second hydraulic cylinder and the stop plate periodically, so that the edges of the material pile are kept neat and uniform at all times.

[0024] Other features and advantages of the present application will become clear from the following detailed description of exemplary embodiments thereof, with reference to the attached drawings. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application.

[0026] Figure 1 FIG. 1 is a schematic view of the overall structure of a planar printed matter receiving structure in one embodiment;

[0027] Figure 2Figure 1 is a top view of an auxiliary mechanism of a planar printed matter receiving structure according to an embodiment;

[0028] Figure 3 Figure 2 is a bottom view of an auxiliary mechanism of a planar printed matter receiving structure according to an embodiment;

[0029] Figure 4 Figure 3 is a left side view of a partial receiving mechanism of a planar printed matter receiving structure according to an embodiment;

[0030] Figure 5 Figure 4 is a right side view of a partial receiving mechanism of a planar printed matter receiving structure according to an embodiment.

[0031] In the drawings: 1, mounting frame; 2, support leg; 3, fixed frame; 4, auxiliary mechanism; 401, roller shaft; 402, push plate; 403, transmission belt; 404, first connecting head; 405, first hydraulic cylinder; 406, third connecting head; 407, second connecting head; 408, pin rod; 409, positioning block; 410, positioning rod; 411, long rod; 412, hook; 413, pressure covering wheel; 414, adapter plate; 415, cross plate; 416, first rotating wheel; 417, first servo motor; 418, second rotating wheel; 419, first transmission belt; 420, first mounting plate; 5, receiving mechanism; 501, support plate; 502, guide rod; 503, second servo motor; 504, third rotating wheel; 505, pressure wheel; 506, threaded rod; 507, fourth rotating wheel; 508, second transmission belt; 509, receiving plate; 510, second mounting plate; 511, positioning plate; 512, second hydraulic cylinder; 513, abutting plate. DETAILED DESCRIPTION

[0032] Various example embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements, numerical expressions, and numerical values of components and steps set forth in these embodiments are not limiting to the scope of the present application unless otherwise specifically stated.

[0033] The following description of at least one example embodiment is merely illustrative in nature and is in no way limiting to the scope of the application and its applications or uses.

[0034] Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail herein. However, the techniques, methods, and devices are sufficiently described herein such that artisans of ordinary skill in the art are able to construct them.

[0035] In all of the examples shown and discussed herein, any specific values should be interpreted as merely illustrative and not as a limitation. Thus, other examples of the example embodiments can have different values.

[0036] AsFigures 1-5 As shown in the figure, a planar printed matter receiving structure comprises a mounting structure 1, support legs 2 are respectively arranged at the bottom four corners of the mounting structure 1, an auxiliary mechanism 4 is movably arranged at one end of the mounting structure 1, and a receiving mechanism 5 is arranged at the other end of the mounting structure 1;

[0037] The auxiliary mechanism 4 comprises toggle plates 402 movably arranged inside the mounting structure 1, a conveying belt 403 is arranged between the two toggle plates 402 through a plurality of roller shafts 401, one end of a first hydraulic cylinder 405 is movably connected to the lower part of the two toggle plates 402, and the other end of the first hydraulic cylinder 405 is movably connected to the inside of the mounting structure 1;

[0038] The receiving mechanism 5 comprises a threaded rod 506 for lifting adjustment, a receiving plate 509 is threadedly connected to the threaded rod 506, a fixed frame 3 is welded to the top of the mounting structure 1, positioning plates 511 are fixedly arranged at the end and both sides of the lower part of the fixed frame 3, a second hydraulic cylinder 512 is fixedly arranged outside the positioning plates 511, and a stop plate 513 is connected to the output end of the second hydraulic cylinder 512 and arranged inside the positioning plates 511.

[0039] In this embodiment, preferably, the roller shaft 401 at one end is connected to the inside of the mounting structure 1 at both ends, and the end of the two toggle plates 402 is movably connected to the end of the roller shaft 401 at the end;

[0040] It should be noted that the movement reference point of the toggle plate 402 in the auxiliary mechanism 4 is determined, the end of the toggle plate 402 is movably connected to the positioning roller shaft 401, thereby forming a stable rotating pair; under the driving of the first hydraulic cylinder 405, the entire load-carrying platform composed of the toggle plate 402 and the conveying belt 403 can smoothly and controllably swing in a circular arc with the roller shaft 401 at the end as the center, thereby ensuring that the auxiliary mechanism 4 is accurately connected to the conveying line of the printed matter and facilitating the transportation of the printed matter.

[0041] In this embodiment, preferably, a first rotating wheel 416 is keyed to one side of the roller shaft 401 at one end, a first mounting plate 420 is welded to one side of the mounting structure 1, a first servo motor 417 is fixedly arranged on the first mounting plate 420, a second rotating wheel 418 is keyed to the output shaft of the first servo motor 417, and a first transmission belt 419 is drivingly connected to the first rotating wheel 416 and the second rotating wheel 418;

[0042] It should be noted that the transmission belt 403 of the auxiliary mechanism 4 is configured with an independent first servo motor 417 driving system, which realizes accurate control of the printing product transmission speed; the first servo motor 417 can be dynamically matched according to the speed of the front-end printing equipment, to ensure that the printing product can be smoothly and impact-free received, and accurate speed control also ensures the accuracy of the position of the printing product on the transmission belt 403, laying a foundation for accurate transfer to the receiving mechanism 5; the active power transmission design greatly improves the adaptability and processing capacity of the system to printing products of different sizes and weights compared with passive rolling.

[0043] In this embodiment, preferably, a horizontal plate 415 is welded inside the mounting structure 1, one end of the horizontal plate 415 is in contact with one end of the transmission belt 403, and the other end of the roller shaft 401 is provided with an adapter plate 414;

[0044] It should be noted that the horizontal plate 415 provides a rigid support plane below the transmission belt 403, effectively preventing the transmission belt 403 from sinking or shaking due to the gravity of the printing product, ensuring the absolute flatness of the material during the transmission process, and the other end of the adapter plate 414 optimizes the transition moment of the printing product from the printing product conveying line to the transmission belt 403, forming a smooth guide slope, ensuring the smoothness and losslessness of the printing product transfer process, and improving the detail quality of the receiving material.

[0045] In this embodiment, preferably, a plurality of positioning blocks 409 are installed on the two toggle plates 402, positioning rods 410 are installed between the two positioning blocks 409, the positioning rods 410 are connected with long rods 411 through hooks 412, and a plurality of pressure covering wheels 413 are movably installed on the long rods 411;

[0046] It should be noted that the movable long rod 411 composed of a plurality of pressure covering wheels 413 is additionally provided above the toggle plate 402, which increases a soft top pressing function; when the printing product is light or easy to curl, the pressure covering wheel 413 can effectively prevent the printing product from warping or shifting due to air flow or static electricity under the action of its own weight or slight pre-tightening force; it can adapt to materials of different thicknesses, ensuring that the printing product remains flat and compliant during the entire transition stage of the auxiliary mechanism 4.

[0047] In this embodiment, preferably, a first connecting head 404 is fixedly arranged at the tail end of the first hydraulic cylinder 405, the first connecting head 404 is movably connected to the inner side of the mounting structure 1 through a pin rod 408, a second connecting head 407 is fixedly arranged at the lower part of the two toggle plates 402, a third connecting head 406 is movably connected to the second connecting head 407 through the pin rod 408, and the output end of the first hydraulic cylinder 405 is connected with the third connecting head 406;

[0048] It should be noted that the standardized hinge mode of the pin rod 408 and the first connecting head 404, the second connecting head 407 and the third connecting head 406 is adopted, the power transmission path between the first hydraulic cylinder 405 and the mounting frame 1 and the actuating plate 402 is clear; the pin rod 408 connection allows the relative rotation between the connected parts, perfectly matches the conversion requirement between the linear extension and contraction movement of the first hydraulic cylinder 405 and the circular arc swing movement of the actuating plate 402; and the connection is reliable, convenient to disassemble and assemble, ensures that the driving force can be efficiently and stably transmitted, and guarantees the accuracy and repeatability of the swing action of the auxiliary mechanism 4.

[0049] In the embodiment, preferably, the bottom end of the threaded rod 506 is movably connected to the bottom of the mounting frame 1, the top end of the threaded rod 506 is movably connected to the lower part of the fixed frame 3, the bottom of the mounting frame 1 is welded with a support plate 501, and the threaded rod 506 penetrates through the middle part of the support plate 501.

[0050] It should be noted that by movably connecting the two ends of the threaded rod 506 to the bottom of the mounting frame 1 and the lower part of the fixed frame 3 respectively, the threaded rod 506 has excellent rigidity and perpendicularity when rotating to drive the receiving plate 509 to lift, effectively preventing the receiving plate 509 from being biased or vibrating; and ensuring that the receiving plate 509 runs stably and without shaking in the entire lifting stroke.

[0051] In the embodiment, preferably, the bottom of the mounting frame 1 is welded with a second mounting plate 510, the second mounting plate 510 is installed with a second servo motor 503 on one side, the output shaft of the second servo motor 503 is movably connected to the bottom of the mounting frame 1, the output shaft of the second servo motor 503 is keyed with a third pulley 504, and the bottom of the mounting frame 1 is installed with a pressing wheel 505 on one side of the second servo motor 503.

[0052] It should be noted that the second servo motor 503 is used to drive the threaded rod 506 to rotate, realizing micron-level accurate control of the lifting position and speed of the receiving plate 509; the second servo motor 503 performs closed-loop feedback adjustment according to the signal of the sensor installed subsequently in the embodiment, realizing intelligent and adaptive height control; the setting of the pressing wheel 505 ensures that the second transmission belt 508 has constant tension between the third pulley 504 and the fourth pulley 507, preventing slipping or step loss during transmission, and ensuring that the instruction of the second servo motor 503 can be transmitted to the threaded rod 506 without loss and accurately.

[0053] In the embodiment, preferably, the bottom of the threaded rod 506 is keyed with the fourth pulley 507, and the third pulley 504, the fourth pulley 507 and the pressing wheel 505 are transmissionally connected with the second transmission belt 508.

[0054] It should be noted that the power of the second servo motor 503, the tension of the compression wheel 505 and the driven input of the threaded rod 506 are organically linked together through the second transmission belt 508, forming an efficient and compact transmission chain; Compared with gear transmission, it has better buffering and lower noise, and is convenient to install and maintain; Ensure that the power of the driving source can be stably and reliably transmitted to the threaded rod 506.

[0055] In this embodiment, preferably, guide rods 502 are fixed between the two ends of the support plate 501 and the fixed frame 3, and the four corners of the receiving plate 509 are respectively movably connected with the guide rods 502.

[0056] It should be noted that the four corners of the receiving plate 509 are movably connected with the guide rods 502, which provides accurate constraints in four directions for the lifting movement of the receiving plate 509; fundamentally prevent the rotation, inclination or horizontal shaking of the receiving plate 509 during lifting, ensure that the receiving plate 509 always maintains a strict horizontal posture; Make the guide rods 502 ensure the smooth operation of the receiving plate 509 in the case of uneven weight distribution of the stacked materials.

[0057] The specific operation process of the present application is as follows:

[0058] In order to control the equipment, a PLC is arranged on one side of the installation framework 1, which is used to control the first hydraulic cylinder 405, the first servo motor 417, the second servo motor 503 and the second hydraulic cylinder 512; Control the second servo motor 503 to drive the threaded rod 506 to rotate, so that the receiving plate 509 rises to the initial highest position, which is slightly lower than the horizontal plane of the transmission belt 403 and the cross plate 415 in the auxiliary mechanism 4, ready to receive the first printed matter; Control the first hydraulic cylinder 405 to be in the stretched state, push the toggle plate 402 to swing around the roller shaft 401 at its end, so that the transmission belt 403 and the adapter plate 414 of the auxiliary mechanism 4 are aligned with the output end of the front-end printing equipment; Control the second hydraulic cylinder 512 to drive the stop plate 513 to move to the initial positioning position;

[0059] The first servo motor 417 is started, and the transmission belt 403 starts to rotate through the first transmission belt 419; After the printed matter is output from the printing equipment, it is stably conveyed to the transmission belt 403; The overpressure wheel 413 above gently presses the printed matter to prevent it from warping; Place the printed matter on the receiving plate 509 in a gentle manner;

[0060] The PLC instructs the second servo motor 503 to rotate a small angle according to the preset thickness of the single printed matter, and the receiving plate 509 is lowered by a distance equal to the thickness of the printed matter through the second transmission belt 508 and the threaded rod 506;

[0061] When the receiving plate 509 is descending, or after the receiving plate 509 is descending, the second hydraulic cylinder 512 is started to drive the abutting plate 513 to perform a short pushing action to the inner side, align the just-placed printed matter with the edge of the stacked matter below, and then quickly reset; the receiving, placing and aligning operations are continuously performed to stack the printed matters in order on the receiving plate 509;

[0062] When the stacked printed matters reach a preset height or quantity, the device sends a signal or automatically stops; the staff or subsequent transfer device takes away the neat matter stack from the receiving plate 509; after taking away, the receiving plate 509 can be automatically reset to the initial position to start a new receiving cycle.

[0063] Although some specific embodiments of the utility model have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, and are not intended to limit the scope of the utility model. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.

Claims

1. A planar printed matter receiving structure, characterized by: Including installation architecture (1), one end of the installation architecture (1) is movably installed with auxiliary mechanism (4), the other end of the installation architecture (1) is installed with material receiving mechanism (5); The auxiliary mechanism (4) includes a toggle plate (402) movably connected to the inside of the installation architecture (1), a transmission belt (403) is installed between the two toggle plates (402) by a plurality of roller shafts (401), one end of a first hydraulic cylinder (405) is movably connected to the lower part of the two toggle plates (402), the other end of the first hydraulic cylinder (405) is movably connected to the inside of the installation architecture (1). The material receiving mechanism (5) includes a threaded rod (506) for lifting adjustment, a material receiving plate (509) is threadedly connected to the threaded rod (506), a fixed frame (3) is welded to the top of the installation architecture (1), a positioning plate (511) is fixedly arranged at the end and both sides of the lower part of the fixed frame (3), a second hydraulic cylinder (512) is fixedly arranged at the outside of the positioning plate (511), and a stop plate (513) is connected to the output end of the second hydraulic cylinder (512) and located inside the positioning plate (511).

2. The printed matter collecting structure according to claim 1, wherein: The two ends of the roller shaft (401) at one end are connected to the inside of the installation architecture (1), and the ends of the two toggle plates (402) are movably connected to the ends of the roller shafts (401) at the ends.

3. A planar printed matter receiving structure according to claim 2, wherein: A first rotating wheel (416) is keyed connected to one side of the roller shaft (401) at one end, a first mounting plate (420) is welded to one side of the installation architecture (1), a first servo motor (417) is fixedly installed on the first mounting plate (420), a second rotating wheel (418) is keyed connected to the output shaft of the first servo motor (417), and a first transmission belt (419) is drivingly connected to the first rotating wheel (416) and the second rotating wheel (418).

4. A planar printed matter collecting structure according to claim 3, characterized in that: A cross plate (415) is welded inside the installation architecture (1), one end of the cross plate (415) is in contact with one end of the transmission belt (403), and the roller shaft (401) at the other end is installed with an adapter plate (414).

5. A planar printed matter receiving structure according to claim 4, wherein: A plurality of positioning blocks (409) are installed on the two toggle plates (402), a positioning rod (410) is installed between the positioning blocks (409) on both sides, the positioning rod (410) is connected with a long rod (411) through a hook (412), and a plurality of pressure covering wheels (413) are movably installed on the long rod (411).

6. A planar printed matter receiving structure according to claim 5, wherein: A first connecting head (404) is fixedly arranged at the tail end of the first hydraulic cylinder (405), the first connecting head (404) is movably connected to the inside of the installation architecture (1) through a pin rod (408), a second connecting head (407) is fixedly arranged at the lower part of the two toggle plates (402), a third connecting head (406) is connected to the output end of the first hydraulic cylinder (405), and the third connecting head (406) is movably connected to the second connecting head (407) through a pin rod (408).

7. A planar printed matter receiving structure according to claim 6, wherein: The bottom end of the threaded rod (506) is movably connected to the bottom of the mounting frame (1), the top end of the threaded rod (506) is movably connected to the lower part of the fixed frame (3), the inner side of the bottom of the mounting frame (1) is welded with a support plate (501), and the threaded rod (506) penetrates through the middle part of the support plate (501).

8. A planar printed matter receiving structure according to claim 7, wherein: The bottom of the mounting frame (1) is welded with a second mounting plate (510), one side of the second mounting plate (510) is mounted with a second servo motor (503), the output shaft of the second servo motor (503) is movably connected to the bottom of the mounting frame (1), the output shaft of the second servo motor (503) is keyed with a third rotating wheel (504), and the bottom of the mounting frame (1) is mounted with a pressing wheel (505) on one side of the second servo motor (503).

9. A planar printed matter receiving structure according to claim 8, wherein: The bottom of the threaded rod (506) is keyed with a fourth rotating wheel (507), and the third rotating wheel (504), the fourth rotating wheel (507) and the pressing wheel (505) are drivingly connected with a second transmission belt (508).

10. A planar printed material receiving structure according to claim 9, wherein: The two ends of the support plate (501) and the fixed frame (3) are fixedly provided with guide rods (502), and the four corners of the material receiving plate (509) are movably connected with the guide rods (502).

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