A whole material device and a code spraying system

Abstract

The application discloses a material arranging device and a code spraying system. The material arranging device comprises a conveying line and a limiting assembly. The limiting assembly comprises a first driving structure and a limiting roller. A limiting passage allowing a single ruler to pass through is formed between the limiting roller and the conveying surface of the conveying line. The first driving structure is connected with the limiting roller. In the material arranging device, when two rulers crossing and stacking with each other move to the limiting passage along the conveying line, the direction of the linear velocity of the lower roller surface of the limiting roller is opposite to the conveying direction of the conveying line. Thus, the lower ruler can smoothly pass through the limiting passage under the conveying of the conveying line, while the upper ruler moves in the opposite direction of the conveying direction of the conveying line under the driving of the limiting roller, and then falls from the lower ruler, so that the rulers can pass through the limiting passage one by one. The material arranging device can automatically arrange the rulers on the conveying line, realizes the output of the rulers one by one, and reduces the labor intensity of the workers.

Description

Technical Field

[0001] This invention relates to the field of material preparation technology, and in particular to a material preparation device and a coding system. Background Technology

[0002] During the manufacturing process of wooden rulers, it is necessary to use an inkjet printer to print scale markings on the surface of the wooden rulers. In order to improve the inkjet printing effect on the wooden rulers, the wooden rulers need to be transported to the inkjet printer one by one.

[0003] In related technologies, since wooden rulers are usually stored in bundles, when the bundles of wooden rulers are placed directly on the conveyor line, the wooden rulers will overlap and stack with each other. Therefore, when feeding wooden rulers, workers usually need to manually place the wooden rulers one by one on the conveyor belt, which undoubtedly greatly increases the labor intensity of the workers. Summary of the Invention

[0004] The purpose of this invention is to at least solve one of the technical problems existing in the prior art. A first aspect of this invention provides a material sorting device that can automatically sort wooden rulers so that they can be output one by one. A second aspect of this invention also provides a coding system including the sorting device of the first aspect of this invention.

[0005] According to a first aspect of the present invention, a material handling device includes a conveyor line and a limiting assembly; the conveyor line is used to convey the movement of wooden rulers; the limiting assembly includes a first driving structure and a limiting roller, a limiting channel is formed between the limiting roller and the conveying surface of the conveyor line to allow a single wooden ruler to pass through, the first driving structure is connected to the limiting roller, the first driving structure is capable of driving the limiting roller to rotate, and the direction of the linear velocity of the lower side roller surface of the limiting roller is opposite to the conveying direction of the conveyor line.

[0006] The material sorting device of this invention has at least the following beneficial effects: In the material sorting device of this application, the conveyor line can transport wooden rulers. When two wooden rulers that are stacked together are transported to the limiting channel, the limiting roller can rotate under the drive of the first driving structure. Furthermore, the direction of the linear velocity of the lower roller surface of the limiting roller is opposite to the conveying direction of the conveyor line. Therefore, the wooden ruler located on the lower side can smoothly pass through the limiting channel under the conveyor line's transport, while the wooden ruler located on the upper side moves in the opposite direction of the conveyor line's transport under the drive of the limiting roller until it falls off the lower wooden ruler, so that the wooden rulers can pass through the limiting channel one by one. The material sorting device of this application can automatically sort the wooden rulers on the conveyor line to achieve the output of wooden rulers one by one, thereby reducing the labor intensity of workers.

[0007] According to the material preparation device of the first aspect of the present invention, the limiting roller includes a roller shaft and a roller sleeve. The roller sleeve is sleeved on the surface of the roller shaft. When the wooden ruler passes through the limiting channel, the roller sleeve can undergo elastic deformation under the counter-pushing of the wooden ruler to avoid the wooden ruler.

[0008] According to the material straightening device of the first aspect of the present invention, the outer peripheral surface of the roller sleeve is provided with a plurality of grooves, the extending direction of the grooves is parallel to the extending direction of the roller sleeve, and the plurality of grooves are spaced apart along the outer peripheral surface of the roller sleeve.

[0009] According to the material straightening device of the first aspect of the present invention, the limiting roller includes a roller shaft and a plurality of roller sleeves, the plurality of roller sleeves being sleeved on the roller shaft along the extending direction of the roller shaft.

[0010] According to the first aspect of the present invention, the material handling device further includes a vibration component, which is disposed in front of the limiting component along the conveying direction of the conveyor line, and is used to vibrate and disperse the wooden ruler on the conveyor line.

[0011] According to the material handling device of the first aspect of the present invention, the device further includes a conveying assembly, which includes multiple conveyor belts arranged in parallel to form a conveying line; the vibration assembly includes a second driving structure and a vibration structure, the second driving structure being connected to the vibration structure, the second driving structure being capable of driving the vibration structure to perform lifting and lowering movements so that the vibration structure passes through the gap between two adjacent conveyor belts to vibrate and disperse the wooden rulers on the conveyor belts.

[0012] According to the material handling device of the first aspect of the present invention, the vibration structure includes a plurality of vibrating elements, which are spaced apart along the width direction of the conveyor line and extend along the conveying direction of the conveyor line.

[0013] According to the material handling device of the first aspect of the present invention, the vibration assembly further includes a mounting frame, and the vibration structure is slidably disposed on the mounting frame in the vertical direction; the second driving structure includes a driver and a rotating member, the driver is connected to the rotating member and is used to drive the rotating member to rotate along a horizontal axis, and the vibration structure is connected to the portion of the rotating member that deviates from its own rotation axis.

[0014] According to the first aspect of the present invention, the material handling device further includes a storage area for placing bundles of wooden rulers, the conveyor line passes through the storage area and is along the conveying direction of the conveyor line, the storage area is located in front of the limiting component, and the vibration component is located below the storage area.

[0015] The inkjet printing system provided according to a second aspect of the present invention includes the material preparation device provided according to a first aspect of the present invention.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0018] Figure 1 This is a schematic diagram of the structure of a material straightening device according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of a limiting roller according to an embodiment of the present invention;

[0020] Figure 3 for Figure 2 A schematic diagram of the structure at point A of the limiting roller shown;

[0021] Figure 4 for Figure 1 A schematic diagram of the vibration assembly of the material handling device shown.

[0022] Figure 5 This is a schematic diagram showing the state of each wooden ruler after it has been sorted on the conveyor line according to an embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram showing the state of each wooden ruler on the conveyor line before sorting, according to an embodiment of the present invention.

[0024] Figure label:

[0025] Conveying assembly 100; conveyor line 101; storage area 102; conveyor belt 110; support plate 120; insertion hole 121;

[0026] Limiting component 200; limiting roller 210; roller shaft 211; roller sleeve 212; groove 212a;

[0027] Vibration assembly 300; second drive structure 310; driver 311; rotating component 312; vibration structure 320; mounting plate 321; connecting rod 322; vibrating component 323; mounting bracket 330;

[0028] Wooden ruler 400; First wooden ruler 400A; Second wooden ruler 400B. Detailed Implementation

[0029] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0030] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0031] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0032] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0033] Understandably, to facilitate the storage and transportation of wooden rulers 400, multiple wooden rulers 400 are usually bundled together. Correspondingly, before being placed into the inkjet printing system for coding, the wooden rulers 400 are also bundled together. If the bundled wooden rulers 400 are placed directly on the conveyor belt 110, it is difficult for the individual rulers 400 to separate, and they are prone to misalignment. Figure 6 The cross-stacked situation shown makes the subsequent inkjet printer's inkjet printing effect on the wooden ruler 400 poor.

[0034] To ensure the printing effect of the inkjet printer on the wooden rulers 400, the various wooden rulers 400 should be spaced as follows: Figure 5 The wooden rulers 400 are arranged in the form shown, with each ruler 400 spaced apart along the conveying direction of the conveyor line 101. For example, when the conveyor line 101 extends from front to back, each wooden ruler 400 on the conveyor line 101 should be spaced apart along the front-back direction.

[0035] Based on the above, after the wooden rulers 400 are placed on the conveyor belt 110, the staff needs to manually adjust the position of the wooden rulers 400 so that each wooden ruler 400 is aligned with the conveyor belt 110. Figure 5 The arrangement is as shown in the figure.

[0036] However, manually adjusting the posture of the wooden ruler 400 would undoubtedly greatly increase the labor intensity of the workers and affect the automation of the wooden ruler 400 coding.

[0037] refer to Figure 6Two wooden rulers 400 are stacked in a crisscross pattern. The wooden ruler 400 on the upper side is named the first wooden ruler 400A, and the wooden ruler 400 on the lower side is named the second wooden ruler 400B.

[0038] To reduce the workload of staff, refer to Figure 1 According to a first aspect of the present invention, a material handling device includes a conveyor line 101 and a limiting component 200. The conveyor line 101 extends in a front-to-back direction and is used to convey a wooden ruler 400 from front to back. The limiting component 200 includes a first drive structure and a limiting roller 210. The limiting roller 210 extends in a left-to-right direction and is disposed on the conveying path of the conveyor line 101. A limiting channel is formed between the limiting roller 210 and the conveying surface of the conveyor line 101, and the limiting channel allows a single wooden ruler 400 to pass through at a time.

[0039] Furthermore, when the first wooden ruler 400A and the second wooden ruler 400B, which are stacked crosswise, move to the limiting channel under the conveying of the conveyor line 101, the limiting roller 210 can prevent the first wooden ruler 400A from continuing to move along the conveying direction of the conveyor line 101, while the second wooden ruler 400B can move smoothly along the conveying direction of the conveyor line 101 to pass through the limiting channel, so that the first wooden ruler 400A and the second wooden ruler 400B can be arranged on the conveyor line 101 along the conveying direction of the conveyor line 101 to complete the arrangement of the wooden rulers 400.

[0040] It should be noted that, since the length of the wooden ruler 400 is much larger than its width, when the first wooden ruler 400A and the second wooden ruler 400B, which are stacked in a cross manner, move along the conveyor line 101 to the limiting channel, one end of each of the first wooden ruler 400A and the second wooden ruler 400B will extend into the limiting channel. In this case, since one end of the first wooden ruler 400A extends into the limiting channel, the first wooden ruler 400A will obstruct the second wooden ruler 400B from passing through the limiting channel, thereby causing the first wooden ruler 400A and the second wooden ruler 400B to get stuck in the limiting channel.

[0041] For the reasons mentioned above, in some embodiments of the present invention, the first driving structure is connected to the limiting roller 210, the first driving structure can drive the limiting roller 210 to rotate, and the direction of the linear velocity of the lower roller surface of the limiting roller 210 is opposite to the conveying direction of the conveying line 101.

[0042] For example, when the conveyor line 101 conveys the wooden ruler 400 from front to back, the direction of the linear velocity of the lower roller surface of the limiting roller 210 can be towards the front, so that when the limiting roller 210 rotates, it can drive the wooden ruler 400 in the limiting channel to move forward.

[0043] Furthermore, when the first wooden ruler 400A and the second wooden ruler 400B, which are stacked in a cross manner, are conveyed to the limiting channel along the conveyor line 101, even if one end of the first wooden ruler 400A and the second wooden ruler 400B extends into the limiting channel, the first driving structure can drive the limiting roller 210 to rotate. The limiting roller 210 can push the first wooden ruler 400A located on the upper side to move forward, thereby causing the first wooden ruler 400A to disengage from the limiting channel. In this case, the second wooden ruler 400B can continue to move backward along the conveyor line 101 to pass through the limiting channel smoothly, while the first wooden ruler 400A can pass through the limiting channel immediately after the second wooden ruler 400B passes through the limiting channel.

[0044] It should be noted that, according to reference 5, in order to facilitate the subsequent inkjet printer to print on the wooden ruler 400, in addition to the wooden ruler 400 being distributed at intervals along the conveying direction of the conveying line 101, the extension direction of each wooden ruler 400 should also be kept as perpendicular as possible to the conveying direction of the conveying line 101.

[0045] Although the setting of the limiting roller 210 and the first drive structure can organize the two wooden rulers 400 that are stacked together so that the two wooden rulers 400 are arranged along the conveying direction of the conveyor line 101, the position of the wooden rulers 400 after being organized is relatively scattered, and it is difficult for their extension direction to be perpendicular to the conveying direction of the conveyor line 101.

[0046] To further improve the guiding effect of the limiting component 200 on the wooden ruler 400 on the conveyor line 101, in a further embodiment of the present invention, referring to... Figure 2 The limiting roller 210 includes a roller shaft 211 and a roller sleeve 212. The roller sleeve 212 is sleeved on the surface of the roller shaft 211. The distance between the outer peripheral surface of the roller shaft 211 and the conveying surface of the conveying line 101 is greater than the thickness of a single wooden ruler 400, while the distance between the outer peripheral surface of the roller sleeve 212 and the conveying surface of the conveying line 101 is less than the thickness of a single wooden ruler 400. The roller sleeve 212 is made of a flexible material that can undergo elastic deformation under external force.

[0047] Furthermore, when the wooden ruler 400 moves backward in an inclined state to the limiting channel, the first end of the wooden ruler 400 can enter the limiting channel first. At this time, the lower side of the first end of the wooden ruler 400 is pushed backward by the conveyor line 101. Since the distance between the outer circumference of the roller sleeve 212 and the conveying surface of the conveyor line 101 is less than the thickness of a single wooden ruler 400, the upper side of the first end of the wooden ruler 400 is pushed forward by the roller sleeve 212. The second end of the wooden ruler 400, located outside the limiting channel, is only pushed backward by the conveyor line 101. Under these circumstances, the forward movement speed of the second end will be greater than the forward movement speed of the first end, thus... This allows the extension direction of the wooden ruler 400 to be adjusted to the left and right direction. Then, the upper side of the first end and the upper side of the second end of the wooden ruler 400 will be pushed forward by the roller sleeve 212, and the lower side of the first end and the lower side of the second end of the wooden ruler 400 will be pushed backward by the conveyor line 101. Since the push force applied by the conveyor line 101 is greater than the push force applied by the roller sleeve 212, the roller sleeve 212 will deform under the reverse push of the wooden ruler 400, so that the wooden ruler 400 can pass smoothly through the limiting channel. After the wooden ruler 400 passes through the limiting channel, the extension direction of the wooden ruler 400 can be basically perpendicular to the conveying direction of the conveyor line 101.

[0048] It should be noted that after the extension direction of the wooden ruler 400 is adjusted to be basically perpendicular to the conveying direction of the conveyor line 101, the wooden ruler 400 needs to pass through the limiting channel. During the process of the wooden ruler 400 passing through the limiting channel, the roller sleeve 212 needs to undergo elastic deformation under the counter-push of the wooden ruler 400. That is, the difficulty of the roller sleeve 212 undergoing elastic deformation directly affects the difficulty of the wooden ruler 400 passing through the limiting channel.

[0049] To facilitate the passage of the wooden ruler 400 through the limiting channel, in a further embodiment of the invention, reference is made to... Figure 3 The outer peripheral surface of the roller sleeve 212 is provided with a plurality of grooves 212a. The extending direction of the grooves 212a is parallel to the extending direction of the roller sleeve 212, and the plurality of grooves 212a are spaced apart along the outer peripheral surface of the roller sleeve 212. For example, the roller sleeve 212 can extend in the left-right direction, and each groove 212a on the outer peripheral surface of the roller sleeve 212 also extends in the left-right direction.

[0050] It is understandable that by setting multiple grooves 212a on the outer circumferential surface of the roller sleeve 212, the strength of the roller sleeve 212 can be reduced, so that the roller sleeve 212 can more easily undergo elastic deformation under the counter-pushing of the wooden ruler 400, thereby reducing the difficulty for the wooden ruler 400 to pass through the limiting channel.

[0051] It should be noted that the length of the wooden ruler 400 is much larger than its width. Accordingly, the length of the roller 211 needs to be set to be longer. If the length of the roller sleeve 212 is set to be the same as the length of the roller 211, it will undoubtedly increase the manufacturing cost of the sorting device of the present invention.

[0052] To reduce the manufacturing cost of the finishing device, in some embodiments of the present invention, reference is made to... Figure 2 The limiting roller 210 includes a roller shaft 211 and multiple roller sleeves 212, which are sleeved on the roller shaft 211 along the extension direction of the roller shaft 211.

[0053] It is understandable that by fitting multiple roller sleeves 212 onto the limiting roller 210, and by making each roller sleeve 212 shorter, the manufacturing cost of the roller sleeve 212 can be reduced, thereby reducing the manufacturing cost of the finishing device.

[0054] Understandably, by setting multiple roller sleeves 212, the resistance of the limiting roller 210 in preventing the wooden ruler 400 from passing through the limiting channel can be reduced, so that the wooden ruler 400 can pass through the limiting channel more smoothly.

[0055] Understandably, by setting up multiple roller sleeves 212, when one of the roller sleeves 212 is damaged, the staff can directly replace the damaged roller sleeve 212, thereby avoiding the need to replace all roller sleeves 212 and reducing the cost of replacing roller sleeves 212.

[0056] It should be noted that although the limiting component 200 can organize two intersecting stacked wooden rulers 400, when the number of intersecting stacked wooden rulers 400 is large, such as three or more, it is difficult to complete the organization of the wooden rulers 400 on the conveyor line 101 by the limiting component 200 alone.

[0057] To achieve better material handling performance from the material handling device of the present invention, reference is made to... Figure 1 In some embodiments of the present invention, the material handling device further includes a vibration component 300. Along the conveying direction of the conveyor line 101, the vibration component 300 is disposed in front of the limiting component 200. The vibration component 300 is used to vibrate and disperse the wooden ruler 400 on the conveyor line 101.

[0058] Furthermore, during the movement of the wooden rulers 400 on the conveyor line 101, the vibration component 300 first vibrates the wooden rulers 400 on the conveyor line 101 to disperse them. Then, the limiting component 200 straightens the wooden rulers 400 on the conveyor line 101 so that they are neatly arranged on the conveyor line 101. The vibration component 300 further improves the straightening effect of the straightening component in this embodiment.

[0059] For details, please refer to Figure 1 The material handling device includes a conveying assembly 100, which includes a support plate 120 and multiple conveyor belts 110. The support plate 120 extends in the front-to-back direction, and the conveyor belts 110 extend in the front-to-back direction and are supported on the support plate 120. The multiple conveyor belts 110 are arranged at intervals in the left-to-right direction on the support plate 120, and the multiple conveyor belts 110 together form a conveying line 101. The front sections of the multiple conveyor belts 110 together form a storage area 102. A vibration assembly 300 can be disposed below the storage area 102, and a limiting assembly 200 can be disposed on the rear side of the storage area 102.

[0060] Then, the workers can place the bundled wooden rulers 400 into the storage area 102. Then, the vibration component 300 can vibrate the wooden rulers 400 in the storage area 102 so that the wooden rulers 400 in the storage area 102 can be initially dispersed. At the same time, the conveyor belt 110 can transport the wooden rulers 400 in the storage area 102 backward so that the wooden rulers 400 are neatly arranged on the conveyor line 101 after passing through the limiting component 200, thereby completing the material processing of the wooden rulers 400.

[0061] In some embodiments of the present invention, reference is made to Figure 4 The vibration assembly 300 includes a second drive structure 310 and a vibration structure 320. The second drive structure 310 is connected to the vibration structure 320. An insertion hole 121 is provided on the support plate 120 located in the storage area 102. The vibration structure 320 is directly opposite the insertion hole 121. Under the drive of the second drive structure 310, the vibration structure 320 can perform a lifting and lowering motion so that the vibration structure 320 can reciprocate through the insertion hole 121 and vibrate the wooden ruler 400 in the storage area 102 up and down.

[0062] It should be noted that the length of the wooden ruler 400 is much larger than its width. When the vibration component 300 vibrates the wooden ruler 400 in the storage area 102, if the uniformity of the force on the wooden ruler 400 along its own length is poor, the wooden ruler 400 will be quite disordered after vibration. For example, the wooden ruler 400 may extend in a direction that is basically parallel to the extension direction of the conveyor belt 110 after vibration. In this case, even if the wooden ruler 400 subsequently passes through the limiting component 200, the limiting component 200 will find it difficult to adjust the wooden ruler 400 to a state in which its extension direction is basically perpendicular to the conveying direction of the conveyor belt 110.

[0063] To ensure that the wooden ruler 400 experiences a more uniform force along its length during vibration, reference... Figure 4 The vibration structure 320 includes a plurality of vibrating elements 323, which are distributed at intervals along the width direction of the conveyor line 101 and extend along the conveying direction of the conveyor line 101.

[0064] It is understandable that, since multiple vibrating elements 323 are distributed at intervals along the width direction of the conveyor line 101,

[0065] Furthermore, when the multiple vibrating elements 323 move up and down under the drive of the second drive structure 310, they can vibrate the wooden ruler 400 evenly in the length direction of the wooden ruler 400, so that the wooden ruler 400 is subjected to more uniform force in its own length direction.

[0066] It is understandable that since the vibrating element 323 extends along the length of the conveyor line 101, it can vibrate more wooden rulers 400 in a single lifting and lowering motion, thereby improving the working efficiency of the vibrating component 300.

[0067] In some embodiments of the present invention, in order to achieve the lifting and lowering motion of the vibrating structure 320, reference is made to... Figure 4 The vibration assembly 300 also includes a mounting bracket 330, on which the vibration structure 320 is slidably mounted vertically; the second drive structure 310 includes a driver 311 and a rotating member 312, the driver 311 being connected to the rotating member 312 and used to drive the rotating member 312 to rotate along a horizontal axis, and the vibration structure 320 being connected to the portion of the rotating member 312 that is off-axis of rotation. For example, as... Figure 4 As shown, a vertically extending slide rail is provided on the mounting frame 330. The vibration structure 320 includes a mounting plate 321, a connecting rod 322, and multiple vibrating elements 323. All multiple vibrating elements 323 are provided on the mounting plate 321, which is slidably mounted on the slide rail. A rotating element 312 is rotatably mounted on the mounting frame 330, and the central axis of the rotating element 312 extends in the front-back direction. A driver 311 is provided on the mounting frame 330 and connected to the rotating element 312. The driver 311 can drive the rotating element 312 to rotate around the central axis. One end of the connecting rod 322 is rotatably connected to the mounting plate 321, and the other end of the connecting rod 322 is rotatably connected to the side of the rotating element 312 that is off-center from the central axis.

[0068] Furthermore, driven by the driver 311, the rotating component 312 can rotate. During the rotation of the rotating component 312, it can drive the connecting rod 322 to move up and down, thereby the connecting rod 322 can drive the mounting plate 321 and the vibrating component 323 to perform lifting and lowering movements.

[0069] The inkjet printing system provided according to a second aspect of the present invention includes the material preparation device provided in the first aspect of the present invention.

[0070] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A material handling device, characterized in that, include: A conveyor line used to move a wooden ruler; A limiting component, comprising a first driving structure and a limiting roller, wherein a limiting channel is formed between the limiting roller and the conveying surface of the conveyor line, allowing a single wooden ruler to pass through; the first driving structure is connected to the limiting roller, and the first driving structure is capable of driving the limiting roller to rotate, and the direction of the linear velocity of the lower side roller surface of the limiting roller is opposite to the conveying direction of the conveyor line. The limiting roller includes a roller shaft and a roller sleeve. The roller sleeve is fitted onto the surface of the roller shaft. The distance between the outer circumferential surface of the roller shaft and the conveying surface of the conveyor line is greater than the thickness of a single wooden ruler. The distance between the outer circumferential surface of the roller sleeve and the conveying surface of the conveyor line is less than the thickness of a single wooden ruler. When the wooden ruler passes through the limiting channel, the roller sleeve can undergo elastic deformation under the counter-pushing of the wooden ruler to avoid the wooden ruler. When the wooden ruler moves backward at an angle to the limiting channel, the first end of the ruler enters the limiting channel first. At this time, the lower surface of the first end of the ruler is pushed backward by the conveyor line. Since the distance between the outer circumference of the roller sleeve and the conveying surface of the conveyor line is less than the thickness of a single wooden ruler, the upper surface of the first end of the ruler is pushed forward by the roller sleeve. The second end of the ruler, located outside the limiting channel, is only pushed backward by the conveyor line. Under these circumstances, the forward speed of the second end will be greater than the forward speed of the first end. This allows the extension direction of the wooden ruler to be adjusted to the left and right direction. Then, the upper side of the first end and the upper side of the second end of the wooden ruler will be pushed forward by the roller sleeve, and the lower side of the first end and the lower side of the second end of the wooden ruler will be pushed backward by the conveyor line. Since the push force applied by the conveyor line is greater than the push force applied by the roller sleeve, the roller sleeve will deform under the reverse push of the wooden ruler, so that the wooden ruler can pass through the limiting channel smoothly. After the wooden ruler passes through the limiting channel, the extension direction of the wooden ruler can be basically perpendicular to the conveying direction of the conveyor line.

2. The material handling device according to claim 1, characterized in that, The outer circumferential surface of the roller sleeve is provided with a plurality of grooves, the extending direction of the grooves being parallel to the extending direction of the roller sleeve, and the plurality of grooves being spaced apart along the outer circumferential surface of the roller sleeve.

3. The material handling device according to claim 1, characterized in that, The limiting roller includes a roller shaft and multiple roller sleeves, with the multiple roller sleeves sleeved on the roller shaft along the extending direction of the roller shaft.

4. The material handling device according to claim 1, characterized in that, It also includes a vibration component, which is located in front of the limiting component along the conveying direction of the conveyor line. The vibration component is used to vibrate the wooden ruler on the conveyor line.

5. A material straightening device according to claim 4, characterized in that, It also includes a conveying assembly comprising multiple conveyor belts arranged in parallel, the multiple conveyor belts together forming the conveying line; the vibration assembly includes a second driving structure and a vibration structure, the second driving structure being connected to the vibration structure, the second driving structure being able to drive the vibration structure to perform lifting and lowering movements, so that the vibration structure passes through the gap between two adjacent conveyor belts to dissipate the wooden ruler on the conveyor belt.

6. A material handling device according to claim 5, characterized in that, The vibration structure includes multiple vibrating elements, which are spaced apart along the width direction of the conveyor line and extend along the conveying direction of the conveyor line.

7. A material straightening device according to claim 5, characterized in that, The vibration assembly further includes a mounting bracket, and the vibration structure is slidably mounted on the mounting bracket in the vertical direction; the second driving structure includes a driver and a rotating component, the driver is connected to the rotating component and is used to drive the rotating component to rotate along a horizontal axis, and the vibration structure is connected to the portion of the rotating component that is off-axis of rotation.

8. A material straightening device according to claim 4, characterized in that, It also includes a storage area for placing bundles of wooden rulers, through which the conveyor line passes and along the conveying direction of the conveyor line, the storage area being located in front of the limiting component, and the vibration component being located below the storage area.

9. A coding system, characterized in that, Includes the material handling device as described in any one of claims 1 to 8.

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