A tofu skin folding and cutting machine

Abstract

The present invention relates to the technical field of bean product processing, and in particular discloses a tofu skin folding and cutting machine. It comprises a PLC control system and a frame, on which a grabbing mechanism, a primary folding conveying structure, a secondary folding conveying mechanism and a cutting mechanism are arranged; the primary folding conveying mechanism comprises a primary conveying belt and primary auxiliary conveying devices and primary auxiliary folding conveying devices on both sides thereof; the secondary folding conveying mechanism comprises a secondary conveying belt and a secondary auxiliary folding conveying device on one side thereof; the present invention is provided with a primary auxiliary folding conveying device and a secondary auxiliary folding conveying device that can be folded, and the manual folding is replaced by a machine, which reduces the direct contact between people and tofu skin, prevents the tofu skin from being contaminated, improves the sanitation level, reduces the labor intensity, and improves the production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of bean product processing, in particular to a bean curd skin folding and cutting machine. Background Art

[0002] Tofu skin is a traditional Chinese bean product, a food made from beans. There are many famous dishes in southern and northern China. Tofu skin is mild in nature and sweet in taste. It has the effects of clearing heat and moistening the lungs, relieving cough and expectoration, nourishing the stomach, detoxifying, and stopping sweating. Tofu skin is rich in nutrients, with high content of protein and amino acids. According to modern scientific measurements, it also contains 18 trace elements necessary for the human body, such as iron, calcium, and molybdenum. Tofu skin is usually made on a tofu skin production machine. After it comes off the production line, it is usually a large sheet and needs to be cut into strips or blocks for easy sale or further processing. The above work is usually done manually, which is inefficient. In addition, due to excessive contact with people, it is easy to transmit bacteria and germs, and the hygiene of tofu skin is not utilized. Summary of the invention

[0003] In order to make up for the defects of the prior art, the present invention provides a hygienic and efficient tofu skin folding and cutting machine.

[0004] The present invention is achieved through the following technical solutions:

[0005] A tofu skin folding and cutting machine, comprising a PLC control system and a frame, characterized in that: the frame is provided with a grabbing mechanism, a primary folding conveying structure, a secondary folding conveying mechanism and a cutting mechanism, the grabbing mechanism comprises a bracket, the bracket is provided with a grabbing moving plate, and the grabbing moving plate is provided with at least two grabbing suction cups; a workbench is provided under the bracket; the primary folding conveying mechanism comprises a primary conveying belt, the bracket is located at the end of the primary conveying belt, primary auxiliary conveying devices are respectively provided on both sides of the head end of the primary conveying belt, and a primary auxiliary folding conveying device is provided at the tail end; the secondary folding conveying mechanism comprises a secondary conveying belt, the A secondary auxiliary folding conveyor device is provided on one side of the secondary conveyor belt, and the primary auxiliary conveyor device, the primary auxiliary folding conveyor device and the secondary auxiliary folding conveyor device all include a plurality of fixed shafts, and a plurality of rollers are provided on the fixed shafts. The primary auxiliary folding conveyor device and the secondary auxiliary folding conveyor device are respectively driven to rotate by a folding cylinder hinged on a frame, and the folding angles of the primary auxiliary folding conveyor device and the secondary auxiliary folding conveyor device exceed 90°; the cutting device includes a knife shaft, and the knife shaft spans above the secondary conveyor belt. A cutting knife is provided on the knife shaft, and the center line of the cutting knife and the knife shaft are located in the same plane.

[0006] The bracket is provided with two conveying cylinders, which are connected via a mounting frame. The mounting frame is provided with a grabbing cylinder, and the lower end of the grabbing cylinder is fixedly connected to a grabbing movable plate.

[0007] The conveying cylinder is a rodless cylinder.

[0008] The lower surface of the grabbing movable plate is provided with a sponge.

[0009] The inner ends of the primary auxiliary folding conveyor device and the secondary auxiliary folding conveyor device are respectively provided with connecting plates with L-shaped cross-sections, and the connecting plates are hinged on the frame. When the primary auxiliary folding conveyor device and the secondary auxiliary folding conveyor device are respectively in a flat state, the height of the primary conveyor belt is higher than the height of the primary auxiliary conveyor device and the primary auxiliary folding conveyor device, and the height of the secondary conveyor belt is higher than the height of the secondary auxiliary folding conveyor device.

[0010] A transition conveying device is provided between the head end of the secondary auxiliary folding conveying device and the tail end of the primary auxiliary folding conveying device. The transition conveying device comprises a head end shaft and a tail end shaft. The tail end shaft is higher than the head end shaft. A plurality of ribbons are wound between the head end shaft and the tail end shaft.

[0011] The rotating shaft driving the secondary conveyor belt to rotate is rotatably connected to the head end shaft.

[0012] A fixed positioning rod capable of adjusting position is provided above the secondary conveyor belt, and a movable positioning rod capable of adjusting position is provided on the secondary auxiliary folding conveyor device. When the secondary auxiliary folding conveyor device is in a flat state, the movable positioning rod is placed on the tail end shaft.

[0013] The entry end of the fixed positioning rod is bent outward.

[0014] A compacting roller is provided at the tail end of the secondary folding and conveying mechanism.

[0015] The beneficial effects of the present invention are:

[0016] The present invention is provided with a primary auxiliary folding and conveying device and a secondary auxiliary folding and conveying device which can be folded, and mechanical folding replaces manual folding, thereby reducing direct contact between people and tofu skin, preventing the tofu skin from being contaminated, improving the sanitation level, reducing labor intensity, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the top view of the structure of the present invention;

[0019] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of AA;

[0020] Figure 3 for Figure 1Schematic diagram of the local cross-section structure along the BB direction;

[0021] Figure 4 for Figure 3 Schematic diagram of the enlarged structure at C in the middle;

[0022] Figure 5 for Figure 1 Schematic diagram of part of the structure in the middle D direction;

[0023] Figure 6 for Figure 1 Schematic diagram of the enlarged structure at E in the middle.

[0024] In the figure, 1 rack;

[0025] 2 grabbing mechanism, 201 bracket, 202 workbench, 203 conveying cylinder, 204 mounting frame, 205 grabbing cylinder, 206 grabbing moving plate, 207 grabbing suction cup, 208 sponge;

[0026] 3 a primary folding conveying mechanism, 301 a primary conveying belt, 302 a primary auxiliary conveying device, 303 a primary auxiliary folding conveying device, 3031 a frame, 3032 a fixed shaft, 3033 a roller, 304 a connecting plate, 305 a folding cylinder;

[0027] 4 secondary folding conveying mechanism, 401 secondary conveying belt, 402 secondary auxiliary folding conveying device, 403 rotating shaft, 404 head end shaft, 405 tail end shaft, 406 fixed positioning rod, 407 movable positioning rod, 408 ribbon;

[0028] 5 cutting mechanism, 501 knife shaft, 502 cutting knife, 503 counting rod;

[0029] 6 compaction roller;

[0030] 7 sensors;

[0031] 8. Buffer conveying device. DETAILED DESCRIPTION

[0032] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0034] The accompanying drawings are specific embodiments of the present invention. Figures 1 to 6As shown, the tofu skin folding and cutting machine includes a PLC control system and a frame 1. The entire present invention is controlled and operated by the PLC control system, including the start-up and operation of various cylinders, motors (including motors that respectively drive the knife shaft 501, the primary conveyor belt 301 and the secondary conveyor belt 401 to rotate) and sensors.

[0035] A gripping mechanism 2 , a primary folding and conveying mechanism 3 , a secondary folding and conveying mechanism 4 and a cutting mechanism 5 are sequentially arranged on the frame 1 .

[0036] The grabbing mechanism 2 includes: a bracket 201 located at the head end of the frame 1, the bracket 201 spans above the frame 1, and is a three-dimensional frame structure. Its width is greater than the frame 1, and a workbench 202 is placed on the wider part for placing large sheets of tofu skin, that is, tofu skin to be cut. Two conveying cylinders 203 are installed on the bracket 201. The conveying cylinders 203 are preferably rodless cylinders to save space. The conveying cylinders 203 are arranged horizontally, that is, perpendicular to the length direction of the frame 1. The two conveying cylinders 203 are arranged along the length direction of the frame 1. The two conveying cylinders 203 are arranged along the length direction of the frame 1. The cylinders 203 are connected by a mounting frame 204, on which a grabbing cylinder 205 is mounted, with the output end of the grabbing cylinder 205 facing downward, and a grabbing movable plate 206 is fixedly mounted at the output end of the grabbing cylinder 205, on which two grabbing suction cups 207 are mounted, and the number may be three, four or more depending on the specific circumstances; in order to prevent the grabbing movable plate 206 from damaging the tofu skin, it is best to install a sponge 208 on the lower surface of the grabbing movable plate 206, with a hole opened on the sponge 208, from which the grabbing suction cup 207 is exposed.

[0037] The primary folding conveying mechanism includes a primary conveying belt 301, the head end of the primary conveying belt 301 is located below the bracket 201, and there are a primary auxiliary conveying device 302 and a primary auxiliary folding conveying device 303 on both sides of the primary conveying belt 301. The primary auxiliary conveying device 302 extends from the head end to the tail end of the primary conveying belt 301, and its length is preferably greater than twice the length of the tofu skin. Next is the primary auxiliary folding conveying device 303, and its length is slightly greater than the length of the tofu skin.

[0038] The secondary folding conveying mechanism 4 includes a secondary conveying belt 401, and a secondary auxiliary folding conveying device 402 is provided on one side of the secondary conveying belt 401. The primary conveying belt 301 and the secondary conveying belt 401 have the same height and are seamlessly connected. When the primary auxiliary folding conveying device 303, the secondary auxiliary folding conveying device 402 and the primary auxiliary conveying device 302 are in a horizontal state, the heights of the primary auxiliary folding conveying device 303, the secondary auxiliary folding conveying device 402 and the primary auxiliary conveying device 302 are lower than the heights of the primary conveying belt 301 and the secondary conveying belt 401.

[0039] The structures of the primary auxiliary folding conveying device 303, the secondary auxiliary folding conveying device 402 and the primary auxiliary conveying device 302 are the same, all of which are a rectangular frame 3031, a plurality of fixed shafts 3032 are installed in the frame 3031, and a plurality of rollers 3033 are sleeved on each fixed shaft 3032, the fixed shaft 3032 does not rotate, and the rollers 3033 can rotate; the primary auxiliary folding conveying device 303 and the secondary auxiliary folding conveying device 402 can be hingedly installed on the frame 1, and the primary auxiliary conveying device 302 is fixedly installed on the frame 1, but it is better that: the primary auxiliary folding conveying device 303, the secondary auxiliary folding conveying device 402 and the primary auxiliary conveying device 302 are respectively connected to a connecting plate 304, the cross-section of the connecting plate 304 is L-shaped, which is the shape of an angle iron as commonly known, and then the connecting plate 304 on the primary auxiliary conveying device 302 is fixed on the frame 1, and the connecting plates 304 on the primary auxiliary folding conveying device 303 and the secondary auxiliary folding conveying device 402 are hinged on the frame 1; three folding cylinders 305 are hinged on the frame 1, and the output ends of the three folding cylinders 305 are respectively hinged on the back sides of the secondary auxiliary folding conveying device 402 and the two primary auxiliary folding conveying devices 303, and they are driven to rotate by the folding cylinders 305.

[0040] The folding angles of the primary auxiliary folding conveying device 303 and the secondary auxiliary folding conveying device 402 are both greater than 90°, and the folding angle of the secondary auxiliary folding conveying device 402 can be between 120° and 170°.

[0041] like Figure 3 As shown, the initial position of the folding cylinder 305 can be slightly tilted.

[0042] When the secondary auxiliary folding conveying device 402 is folded, the connecting plate 304 can contact the tofu skin, so the connecting plate 304 here should be slightly higher than the secondary auxiliary folding conveying device 402.

[0043] There is a transition conveying device between the secondary auxiliary folding conveying device 402 and the primary auxiliary folding conveying device 303, which includes a head end shaft 404 and a tail end shaft 405, driving the rotating shaft 403 of the secondary conveying belt 401 to rotate with the head end shaft 404, the tail end shaft 405 is slightly higher than the head end shaft 404, and a number of ribbons 408 are wound between the head end shaft 404 and the tail end shaft 405.

[0044] A fixed positioning rod 406 with adjustable position is provided above the secondary conveyor belt 401, and the fixed positioning rod 406 is installed on the frame 1. The secondary auxiliary folding conveying device 402 is provided with a movable positioning rod 407 with adjustable position, and the movable positioning rod 407 is installed on the frame 3031. When the secondary auxiliary folding conveying device 402 is in a flat state, the movable positioning rod 407 rests on the tail end shaft 405; when the secondary auxiliary folding conveying device 402 is folded, the movable positioning rod 407 rotates accordingly.

[0045] The adjustment method of the fixed positioning rod 406 and the movable positioning rod 407 is the existing technology, for example, a rod is installed on the two positioning rods, a clamp is installed on the rod, the clamps are respectively fixed on the rack 1 and the frame 3031, and the positions of the two positioning rods are adjusted by adjusting the positions of the rods in the clamps. During the adjustment process, the position of the clamp is fixed, etc., which will not be repeated.

[0046] like Figure 1 As shown, the entry end of the fixed positioning rod 406 is preferably bent outward.

[0047] Sensors 7 are respectively installed at the head and tail ends of the secondary auxiliary folding conveying device 402 and the entrance end of the cutting mechanism.

[0048] A buffer conveyor device 8 is installed between the primary conveyor belt 301 and the secondary conveyor belt 401. The structure of the buffer conveyor device 8 is similar to that of the primary auxiliary conveyor device 302. It has no power mechanism to drive the rotation and conveying, and is driven entirely by the movement of the tofu skin.

[0049] Next is the cutting mechanism 5, which includes a knife shaft 501 spanning across the secondary conveyor belt 401, the knife shaft 501 is driven to rotate by a motor, and a cutting knife 502 is fixedly installed on the knife shaft 501, and the center lines of the cutting knife 502 and the knife shaft 501 are located in the same plane.

[0050] There is also a counting rod 503 on the knife shaft 501, and a sensor 7 installed on the frame 1 is located at the place where the counting rod 503 rotates and faces the rotation track. By setting the rotation speed of the knife shaft 501, the cutting length of the tofu skin and the number of cutting sections of each large piece of tofu skin are determined. For example, if it is to be cut into three sections, four cuts are required (the uneven parts at the beginning and the end must be cut off to make the beginning and the end of each section very neat), that is, the knife shaft 501 rotates four times, and the sensor 7 must sense the counting rod 503 four times.

[0051] Since the bean curd skin is still in a loose and fluffy state after being cut, a compacting roller 6 is installed next to the cutting mechanism 5, and the compacting roller 6 is located above the secondary conveyor belt 401.

[0052] The working process is as follows: first, adjust the positions of the fixed positioning rod 406 and the movable positioning rod 407, set the conveying speed of each conveyor belt, conveying stroke, rotation speed of the knife shaft 501 and the number of cuts of the cutting knife 502 and other parameters, start the PLC control system, all motors, cylinders and sensors 7 are in standby state, the primary conveyor belt 301 and the secondary conveyor belt 401 are running, the operator puts a pile of large tofu skins from the previous process on the workbench 202, the conveying cylinder 203 is started, and the grabbing suction cup 207 reaches the tofu skin. Above the bean curd skin, the grabbing cylinder 205 is started, driving the grabbing moving plate 206 to move downward, the grabbing suction cup 207 sucks the bean curd skin, and then the grabbing cylinder 205 is lifted upward, and the conveying cylinder 203 is started again to drive the bean curd skin to move to the primary conveyor belt 301 and the primary auxiliary conveying device 302, the grabbing suction cup 207 puts the bean curd skin down, and the primary conveyor belt 301 drives the bean curd skin to the primary auxiliary folding conveying device 303, the primary conveyor belt 301 stops running, and the two primary auxiliary folding conveying devices 303 are folded one after another to fold the bean curd skin. The tofu skin is folded into three layers, and the primary conveyor belt 301 runs again. While conveying the next tofu skin, the previous tofu skin is also conveyed to the secondary conveyor belt 401 and the transition conveyor device through the buffer conveyor device 8. When the tofu skin passes the first sensor 7, the secondary conveyor belt 401 starts to run. After the tofu skin is completely conveyed to the secondary auxiliary folding conveyor device 402, the secondary conveyor belt 401 stops running, and the secondary auxiliary folding conveyor device 402 folds the tofu skin again. At this time, there are six layers in total. When folding, the connecting plate 304 will preliminarily press the folded part. , so that the folding curvature of the tofu skin becomes smaller, and then the secondary conveyor belt 401 runs again, so that the tofu skin continues to move forward on the secondary conveyor belt 401, reaches the second sensor 7, the cutting mechanism 5 runs, the knife shaft 501 rotates, and the tofu skin is cut into the desired number of sections according to the setting, such as three sections in this embodiment, a total of four cuts are required (the uneven sections at the beginning and end of the tofu skin need to be cut off), that is, the counting rod 503 needs to pass the sensor 7 next to the knife shaft 501 four times, and the cut tofu skin continues to move forward, and after being compacted by the compacting roller 6, it becomes the final required product.

[0053] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0054] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0055] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0057] Except for the technical features described in the specification, the other technical features are known technologies to those skilled in the art.

Claims

1. A tofu skin folding and cutting machine, comprising a PLC control system and a frame (1), characterized in that: The frame (1) is provided with a gripping mechanism (2), a primary folding conveying mechanism (3), a secondary folding conveying mechanism (4) and a cutting mechanism (5); the gripping mechanism (2) comprises a bracket (201); a gripping movable plate (206) is provided on the bracket (201); at least two gripping suction cups (207) are provided on the gripping movable plate (206); a workbench (202) is provided below the bracket (201); the primary folding conveying mechanism comprises a primary conveying belt (301); the bracket (201) is located at the end of the primary conveying belt (301); the primary conveying belt The first auxiliary conveying device (302) is respectively provided on both sides of the head end, and the first auxiliary folding conveying device (303) is provided on the tail end; the second auxiliary folding conveying mechanism (4) comprises a second conveying belt (401), one side of the second conveying belt (401) is provided with a second auxiliary folding conveying device (402), the first auxiliary conveying device (302), the first auxiliary folding conveying device (303) and the second auxiliary folding conveying device (402) all comprise a plurality of fixed shafts (3032), the fixed shafts (3032) are provided with a plurality of rollers (3033), the first auxiliary conveying device (3032) and the second auxiliary folding conveying device (40 ... The auxiliary folding conveying device (303) and the secondary auxiliary folding conveying device (402) are respectively driven to rotate by a folding cylinder (305) hinged on the frame (1), and the folding angles of the primary auxiliary folding conveying device (303) and the secondary auxiliary folding conveying device (402) exceed 90°; the cutting mechanism (5) comprises a knife shaft (501), the knife shaft (501) spans above the secondary conveying belt (401), a cutting knife (502) is provided on the knife shaft (501), and the center line of the cutting knife (502) and the knife shaft (501) are located in the same plane; The inner ends of the primary auxiliary folding conveying device (303) and the secondary auxiliary folding conveying device (402) are respectively provided with connecting plates (304) with L-shaped cross sections, and the connecting plates (304) are hinged on the frame (1). When the primary auxiliary folding conveying device (303) and the secondary auxiliary folding conveying device (402) are respectively in a flat state, the height of the primary conveying belt (301) is higher than the height of the primary auxiliary conveying device (302) and the primary auxiliary folding conveying device (303), and the height of the secondary conveying belt (401) is higher than the height of the secondary auxiliary folding conveying device (402).

2. The tofu skin folding and cutting machine according to claim 1, characterized in that: The support (201) is provided with two conveying cylinders (203), the two conveying cylinders (203) are connected via a mounting frame (204), the mounting frame (204) is provided with a grabbing cylinder (205), and the lower end of the grabbing cylinder (205) is fixedly connected to a grabbing movable plate (206).

3. The tofu skin folding and cutting machine according to claim 2, characterized in that: The delivery cylinder (203) is a rodless cylinder.

4. The tofu skin folding and cutting machine according to claim 1, characterized in that: The lower surface of the grabbing movable plate (206) is provided with a sponge (208).

5. The tofu skin folding and cutting machine according to claim 1, characterized in that: A transition conveying device is provided between the head end of the secondary auxiliary folding conveying device (402) and the tail end of the primary auxiliary folding conveying device (303), wherein the transition conveying device comprises a head end shaft (404) and a tail end shaft (405), wherein the tail end shaft (405) is higher than the head end shaft (404), and a plurality of ribbons (408) are wound between the head end shaft (404) and the tail end shaft (405).

6. The tofu skin folding and cutting machine according to claim 5, characterized in that: The rotating shaft (403) driving the secondary conveyor belt (401) to rotate is rotatably connected to the head end shaft (404).

7. The tofu skin folding and cutting machine according to claim 6, characterized in that: A fixed positioning rod (406) capable of adjusting the position is provided above the secondary conveyor belt (401), and the secondary auxiliary folding conveyor device (402) is provided with a movable positioning rod (407) capable of adjusting the position. When the secondary auxiliary folding conveyor device (402) is in a flat state, the movable positioning rod (407) rests on the tail end shaft (405).

8. The tofu skin folding and cutting machine according to claim 7, characterized in that: The entry end of the fixed positioning rod (406) is bent outwards.

9. The tofu skin folding and cutting machine according to any one of claims 1 to 8, characterized in that: A compacting roller (6) is provided at the tail end of the secondary folding and conveying mechanism (4).

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