A laser measuring device for measuring the joint gap of bamboo boards

Abstract

The application discloses a kind of bamboo board splicing gap laser measuring devices, it is related to laser measuring device technical field, including metal frame and roller conveyor is driven by motor and is installed by roller conveyor, the fixed frame is fixed on the metal frame, the first air cylinder is fixed on the fixed frame and symmetrical in front and back, the output end of the first air cylinder is fixed with limit plate.This bamboo board splicing gap laser measuring device is adjusted by setting baffle assembly, by selecting the baffle slightly smaller than single bamboo strip in width, so that it accurately covers the groove or natural texture on the surface of bamboo strip during detection, while exposing the splicing gap to be measured under laser path, thereby effectively isolating the main interference source, so that laser and camera system can focus on the real splicing gap, fundamentally solve the problem of false detection caused by bamboo surface features, greatly improve the accuracy and reliability of detection.

Description

Technical Field

[0001] This invention relates to the field of laser measurement device technology, specifically a laser measurement device for the gap between bamboo board splicing. Background Technology

[0002] As a green and environmentally friendly material, bamboo boards are widely used in construction, home furnishing, and handicrafts. One of the core quality indicators is the size of the splicing gap. Excessive gaps directly affect the structural strength, sealing and moisture-proof performance, and appearance of the product. Therefore, accurate and efficient detection and marking of the splicing gaps of bamboo boards at the end of the production line is a key step in ensuring product quality.

[0003] Currently, the industry mainly relies on two methods to detect splicing gaps: one is manual visual inspection with tools such as feeler gauges, which is inefficient, labor-intensive, and susceptible to subjective factors, making it difficult to guarantee accuracy and consistency, and thus unable to meet the needs of modern continuous production; the other is to use automated vision or laser inspection equipment. However, existing automated inspection solutions face significant challenges when applied to bamboo: bamboo boards usually have natural bamboo grain, bamboo nodes, or grooves processed for decoration. These features are easily confused with the actual splicing gaps under laser or vision sensors, forming interference signals, leading to false detections or missed detections, seriously affecting the reliability of the inspection results; in addition, most existing equipment has only one function. After detecting non-conforming products, manual repositioning and marking are still required, resulting in a fragmented process and failing to achieve an automated closed loop of detection, judgment, and labeling, leaving room for improvement in overall production efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a laser measuring device for the splicing gap of bamboo boards, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a laser measuring device for splicing gaps of bamboo boards, comprising a metal frame and a roller conveyor mounted on a roller conveyor driven by a motor, a fixed frame fixed on the metal frame, and a first cylinder symmetrically fixed on the fixed frame, with a limit plate fixed to the output end of the first cylinder; The testing mechanism is used to cover the grooves on the surface of bamboo boards and to detect the gaps between bamboo boards. The testing mechanism is installed on a fixed frame. The marking mechanism is used to automatically mark and locate the gaps between substandard bamboo boards. The marking mechanism is installed on a fixed frame.

[0006] Preferably, the limiting plates are symmetrically distributed about the center line of the metal frame, and the left end of the limiting plate is inclined. The inclined structure at the end of the limiting plate can better guide and limit the bamboo board, so as to facilitate subsequent testing.

[0007] Preferably, the detection mechanism includes a second cylinder symmetrically fixed on a fixed frame, and a mounting plate is fixed to the output end of the second cylinder. The mounting plate is fixed to the laser cover, and a round rod is symmetrically fixed on the laser cover. The round rod is slidably connected to the fixed frame. The height of the mounting plate and the laser cover can be adjusted by the second cylinder. With the sliding guide effect between the round rod and the fixed frame, the stability of the movement of the mounting plate and the laser cover can be ensured.

[0008] Preferably, a laser emitter is fixed to the upper surface of the laser cover, and a detection camera for detecting laser lines is fixed to the side of the laser cover. A light-shielding plate is symmetrically slidably connected to the front and rear of the laser cover, and the light-shielding plate is slidably connected to the fixing frame. A vertical rod is fixed to the lower end of the light-shielding plate, and the vertical rod is slidably connected to the cylinder. The cylinder is fixed to a limiting plate, and the distance between the two limiting plates is equal to the distance between the two light-shielding plates. Through the cooperation of the laser emitter and the detection camera, the detection of gaps in bamboo board splicing can be achieved. Furthermore, the light-shielding plate can limit the laser radiation width, ensuring that the laser radiation width is equal to the width of the bamboo board, thus better meeting the detection requirements.

[0009] Preferably, the mounting plate and the positioning block are nested together, and the positioning block is symmetrically fixed on the baffle. The width of the baffle is smaller than the width of a single bamboo board. At the same time, first ball bearings are evenly installed on the lower end face of the baffle. The first ball bearings contact and roll with the bamboo board. Through the nested connection between the mounting plate and the positioning block, the baffle can be installed, thereby providing a basic guarantee for the surface shielding of a single bamboo board and avoiding the influence of the surface texture of the bamboo board on the accuracy of the test data.

[0010] Preferably, a movable ring is slidably connected to the positioning block, and a first spring is fixed between the movable ring and the baffle. A limit rod is fixed to the movable ring, and the limit rod is slidably connected to the positioning block. The limit rod is engaged with the mounting plate. Through the sliding action between the movable ring and the positioning block, the engagement and disengagement of the limit rod and the mounting plate can be controlled, thus providing a basic guarantee for the disassembly and assembly of the baffle. Furthermore, through the elastic action of the first spring, a basic force can be provided for the reset of the movable ring and the limit rod, thereby ensuring the stability of the engagement between the limit rod and the mounting plate.

[0011] Preferably, the marking mechanism includes a bracket fixed to the fixed frame, a servo motor fixed on the bracket, and a lead screw fixed to the output end of the servo motor. The lead screw bearing is connected to the bracket. The lead screw drives the movable block to move back and forth. The movable block and the guide rod are slidably connected. The guide rod is fixed to the bracket. Through the action of the servo motor and the lead screw, a basic force can be provided to realize the position adjustment of the movable block. Through the sliding guidance between the movable block and the guide rod, the stability of the movable block's movement can be ensured.

[0012] Preferably, a third cylinder is fixed to the lower end face of the movable block, and an ink cartridge is fixed to the output end of the third cylinder. An absorbent cotton is installed at the lower end of the ink cartridge, and the absorbent cotton slides in contact with the marking roller. The marking roller bearing is connected to the ink cartridge. Through the action of the third cylinder, the height of the ink cartridge, absorbent cotton, and marking roller can be adjusted, thereby providing a basic guarantee for subsequent marking. Furthermore, the liquid guiding effect of the absorbent cotton can effectively avoid excessive ink waste and effectively save resources.

[0013] Preferably, a fixing rod is fixed to the ink cartridge, and a second ball bearing is installed on the fixing rod. The second ball bearing rolls in contact with the movable plate. At the same time, a sliding rod is fixed to the upper surface of the movable plate. The sliding rod is slidably connected to the bracket, and a second spring is also fixed between the sliding rod and the bracket. When the ink cartridge moves, the sliding rod can be moved, thereby releasing the sliding rod from supporting the movable plate. In combination with the elastic effect of the second spring and the sliding guiding effect between the sliding rod and the bracket, a basic force can be provided for the downward movement of the movable plate, thus providing a basic guarantee for the self-locking of the movable block position and ensuring the stability of the device. Furthermore, the rolling action between the second ball bearing and the movable plate can reduce friction and ensure the normal operation of the device.

[0014] Preferably, a toothed plate is fixed to the lower end face of the movable plate, and the toothed plate can be engaged with the toothed block to achieve positioning. The toothed block is fixed on the movable block. When the movable plate moves, the toothed plate can be moved synchronously. By engaging or disengaging the toothed plate with the toothed block, the movable block can be locked and unlocked. By locking the movable block, the stability of the marking roller position during the marking process can be ensured.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This laser measurement device for bamboo board splicing gaps, by setting an adjustable baffle assembly, selects a baffle with a width slightly smaller than a single bamboo strip, so that it accurately covers the grooves or natural textures on the surface of the bamboo strip during detection, while exposing the splicing gap to be measured under the laser path, thereby effectively isolating the main interference source, allowing the laser and camera system to focus on the real splicing gap, fundamentally solving the problem of false detection caused by the surface characteristics of bamboo, and greatly improving the accuracy and reliability of detection; 2. This laser measuring device for bamboo board splicing gaps, through an automatic marking mechanism, allows the control system to immediately drive the marking mechanism to move directly above the defect point when the detection system identifies an unqualified gap, and automatically complete the roller coating marking, replacing the traditional manual search and marking process, greatly improving the production cycle, reducing labor costs, and avoiding omissions caused by human negligence. 3. The laser measuring device for splicing gaps of bamboo boards uses a limit plate and a light-shielding plate to achieve mechanical linkage adjustment through a vertical rod and a cylinder. It can quickly adapt to boards of different widths and adjust the laser irradiation width simultaneously. The operation is simple and quick. The baffle adopts a quick-change snap-fit ​​design, which can quickly replace the corresponding baffle according to the bamboo strips of different widths. This allows one set of devices to be flexibly applied to the testing of products of various specifications. It has strong versatility and reduces equipment investment costs. 4. This laser measurement device for bamboo board splicing gaps uses multi-stage cylinders and servo motors for coordinated control, along with ball bearings, guide rails, and other structures, ensuring smooth and precise operation. During testing, the laser cover can adaptively descend according to the board thickness and accurately position its height. During marking, the position of the movable block can be mechanically locked through the toothed plate and the toothed block, ensuring the stability of the marking roller during operation and thus guaranteeing the accuracy of the marking position. This provides clear guidance for subsequent manual or automatic repairs. Attached Figure Description

[0016] Figure 1 This is a frontal three-dimensional structural diagram of the overall composition of the device of the present invention; Figure 2 This is a frontal three-dimensional structural diagram of the fixing frame of the present invention; Figure 3 This is a bottom-view three-dimensional structural diagram of the fixing frame of the present invention; Figure 4 This is a three-dimensional structural diagram of the laser cover of the present invention, viewed from the front and cross-sectional view. Figure 5 This is a frontal cross-sectional three-dimensional structural diagram of the mounting plate and positioning block of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the middle; Figure 7 This is a bottom-view three-dimensional structural diagram of the marking mechanism of the present invention; Figure 8 This is a frontal cross-sectional three-dimensional structural diagram of the ink cartridge of the present invention.

[0017] In the diagram: 1. Metal frame; 2. Roller conveyor; 3. Fixed frame; 4. First cylinder; 5. Limiting plate; 6. Detection mechanism; 601. Second cylinder; 602. Mounting plate; 603. Laser cover; 604. Round rod; 605. Laser emitter; 606. Detection camera; 607. Light shield; 608. Vertical rod; 609. Cylinder; 610. Positioning block; 611. Baffle; 612. First ball bearing; 613. Movable ring; 61 4. First spring; 615. Limiting rod; 7. Marking mechanism; 701. Bracket; 702. Servo motor; 703. Lead screw; 704. Movable block; 705. Guide rod; 706. Third cylinder; 707. Ink cartridge; 708. Absorbent cotton; 709. Marking roller; 710. Fixed rod; 711. Second ball bearing; 712. Movable plate; 713. Slide rod; 714. Second spring; 715. Toothed plate; 716. Toothed block. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-8 The present invention provides a technical solution: a laser measuring device for splicing gaps of bamboo boards, including a metal frame 1 and a roller conveyor 2. The roller conveyor 2 driven by a motor is installed on the metal frame 1. A fixing frame 3 is fixed on the metal frame 1. A first cylinder 4 is symmetrically fixed on the fixing frame 3. A limit plate 5 is fixed at the output end of the first cylinder 4. The detection mechanism 6 is used to cover the grooves on the surface of bamboo boards and to detect the gaps between bamboo boards. The detection mechanism 6 is installed on the fixed frame 3. The marking mechanism 7 is used to automatically mark and position the gaps between substandard bamboo boards. The marking mechanism 7 is installed on the fixed frame 3.

[0020] The limiting plate 5 is symmetrically distributed about the center line of the metal frame 1, and the left end of the limiting plate 5 is inclined. The detection mechanism 6 includes a second cylinder 601 symmetrically fixed on the fixed frame 3, and the output end of the second cylinder 601 is fixed with a mounting plate 602. The mounting plate 602 is fixed to the laser cover 603. At the same time, round rods 604 are symmetrically fixed on the laser cover 603, and the round rods 604 are slidably connected to the fixed frame 3. A laser emitter 605 is fixed on the upper surface of the laser cover 603, and a detection camera 606 for detecting laser lines is fixed on the side of the laser cover 603. A light shield 607 is symmetrically slidably connected on the laser cover 603, and the light shield 607 is slidably connected to the fixed frame 3. A vertical rod 608 is fixed at the lower end of the light shield 607, and the vertical rod 608 is slidably connected to the round rod 604. The cylinders 609 are slidably connected, and the cylinders 609 are fixed on the limiting plates 5. The distance between the two limiting plates 5 is equal to the distance between the two light-shielding plates 607. The mounting plate 602 and the positioning block 610 are nested together. The positioning block 610 is symmetrically fixed on the baffle 611. The width of the baffle 611 is smaller than the width of a single bamboo board. At the same time, the lower end face of the baffle 611 is uniformly equipped with first ball bearings 612, which roll in contact with the bamboo board. The positioning block 610 is slidably connected to a movable ring 613. A first spring 614 is fixed between the movable ring 613 and the baffle 611. A limiting rod 615 is fixed on the movable ring 613. The limiting rod 615 is slidably connected to the positioning block 610, and the limiting rod 615 is engaged with the mounting plate 602. When using this laser measuring device for splicing gaps in bamboo panels, such as Figures 1-8As shown, firstly, the distance between the two limiting plates 5 is adjusted according to the required width of the bamboo board. This is achieved by controlling the extension and retraction of the first cylinder 4, which moves the limiting plates 5, thus adjusting the distance between them to ensure it is equal to the width of the bamboo board. During this adjustment, the vertical rod 608 and the cylinder 609 simultaneously move the light-shielding plate 607, adjusting the distance between them. This, in turn, adjusts the irradiation width of the laser emitter 605, ensuring it is equal to the width of the bamboo board. Finally, a baffle 611 of appropriate width is selected and installed based on the width of each individual bamboo board. Furthermore, the width of the baffle 611 is 5mm smaller than that of a single bamboo board, ensuring that when the baffle 611 covers the carved patterns on the surface of a single bamboo board or the patterns of the bamboo board itself, it will not cover the joints of the bamboo boards, so that subsequent testing can proceed normally. To install the baffle 611, simply press the movable ring 613, which will cause the limiting rod 615 to move down and retract into the positioning block 610. Then, through the nesting action between the positioning blocks 610, the installation can be achieved. After the installation is completed, release the movable ring 613. At this time, under the elastic action of the first spring 614, the movable ring 613 and the limiting rod 615 can be reset, so that the limiting rod 615 can engage with the mounting plate 602 to achieve a locking effect, ensuring the stability of the installation of the baffle 611. After the positions of the limiting plate 5 and the light-shielding plate 607 are adjusted, the processed and spliced ​​bamboo board is placed on the roller conveyor 2 by a robotic arm. The roller conveyor 2 is started to move the bamboo board from left to right. When the bamboo board moves to the point of contact and sliding with the limiting plate 5, the inclined structure at the left end of the limiting plate 5 can guide and correct the position of the bamboo board. When the bamboo board moves to the point below the laser cover 603, the second cylinder 601 extends, which can lower the mounting plate 602, the laser cover 603, and the baffle 611 until the first ball bearing 612 contacts the bamboo board. This achieves the height positioning of the laser emitter 605 and the detection camera 606 to accommodate different thicknesses. The bamboo board is positioned to prevent warping during testing, which could affect the accuracy of the test data. During testing, a laser emitter 605 emits a laser to irradiate the bamboo board and the baffle 611. Since the distance and thickness between the baffles 611 are fixed, i.e., the gap between the two baffles 611 is fixed, when the laser shines through the gap between the two baffles 611 onto the splicing gap on the bamboo board, the testing camera 606 can detect unevenness of the laser beam, thereby detecting whether the splicing gap on the bamboo board meets the standard. Furthermore, during the testing process, the baffles 611 can block the carved patterns or natural grain on the surface of individual bamboo boards, avoiding data interference and ensuring the accuracy of the test data. The marking mechanism 7 includes a bracket 701 fixed to the fixed frame 3, a servo motor 702 fixed on the bracket 701, and a lead screw 703 fixed to the output end of the servo motor 702. The lead screw 703 is bearing-connected to the bracket 701, and the lead screw 703 drives a movable block 704 to move back and forth. The movable block 704 is slidably connected to a guide rod 705, and the guide rod 705 is fixed to the bracket 701. A third cylinder 706 is fixed to the lower end face of the movable block 704, and an ink cartridge 707 is fixed to the output end of the third cylinder 706. An absorbent cotton 708 is installed at the lower end of the ink cartridge 707. The marking roller 709 slides in contact with the marking roller 709, and the marking roller 709 is connected to the ink cartridge 707 by a bearing. A fixing rod 710 is fixed on the ink cartridge 707, and a second ball bearing 711 is installed on the fixing rod 710. The second ball bearing 711 rolls in contact with the movable plate 712. At the same time, a sliding rod 713 is fixed on the upper end face of the movable plate 712. The sliding rod 713 is slidably connected to the bracket 701, and a second spring 714 is also fixed between the sliding rod 713 and the bracket 701. A toothed plate 715 is fixed on the lower end face of the movable plate 712, and the toothed plate 715 can be positioned by engaging with the toothed block 716. The toothed block 716 is fixed on the movable block 704. During device testing, such as Figures 1-8 As shown, when the splicing gap on the bamboo board is detected to be non-compliant, the detection data is fed back to the controller, which then starts the servo motor 702. The servo motor 702 drives the lead screw 703 to rotate, thereby adjusting the front and rear positions of the movable block 704 and the marking roller 709. Combined with the sliding guide action between the movable block 704 and the guide rod 705, the stability of the movement of the movable block 704 and the marking roller 709 is ensured, allowing the marking roller 709 to move above the non-compliant gap. After the movement is complete, the third cylinder 706 extends, causing the ink cartridge 707 and the marking roller 709 to move downwards. As the ink cartridge 707 moves downwards, the fixed rod 710 and the second ball bearing 711 move downwards simultaneously, thereby releasing the support of the fixed rod 710 on the movable plate 712. At this time, the second spring... Under the elastic action of spring 714, the movable plate 712 and the toothed plate 715 move towards the movable block 704. With the sliding guide action between the slide rod 713 and the bracket 701, the stability of the movement of the movable plate 712 and the toothed plate 715 can be ensured until the toothed plate 715 engages with the toothed block 716, thereby locking the front and rear positions of the movable block 704 and the marking roller 709, ensuring the stability of the marking roller 709 during the subsequent marking process. When the ink cartridge 707 and the marking roller 709 move down, when the marking roller 709 comes into contact with the bamboo board, through the contact rolling of the marking roller 709 with the bamboo board and the liquid guiding action of the absorbent cotton 708, the marking roller 709 can mark the unqualified splice seam position on the bamboo board for subsequent processing, thus completing the detection and marking function of the bamboo board splice seam.

[0021] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0022] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A laser measuring device for splicing gaps of bamboo boards, comprising a metal frame (1) and a roller conveyor (2), wherein the roller conveyor (2) driven by a motor is mounted on the metal frame (1), characterized in that: A fixing frame (3) is fixed on the metal frame (1), and a first cylinder (4) is symmetrically fixed on the fixing frame (3). A limit plate (5) is fixed to the output end of the first cylinder (4). The detection mechanism (6) is used to cover the groove pattern on the surface of the bamboo board and to detect the gap between the bamboo boards. The detection mechanism (6) is installed on the fixed frame (3). The marking mechanism (7) is used to automatically mark and position the gaps between unqualified bamboo boards. The marking mechanism (7) is installed on the fixed frame (3).

2. The laser measuring device for splicing gaps of bamboo boards according to claim 1, characterized in that: The limiting plate (5) is symmetrically distributed about the center line of the metal frame (1), and the left end of the limiting plate (5) is inclined.

3. The laser measuring device for splicing gaps of bamboo boards according to claim 1, characterized in that: The detection mechanism (6) includes a second cylinder (601) that is symmetrically fixed on the fixed frame (3) from left to right. The output end of the second cylinder (601) is fixed with a mounting plate (602), and the mounting plate (602) is fixed to the laser cover (603). Meanwhile, a round rod (604) is symmetrically fixed on the laser cover (603) from front to back. The round rod (604) is slidably connected to the fixed frame (3).

4. The laser measuring device for splicing gaps of bamboo boards according to claim 3, characterized in that: A laser emitter (605) is fixed on the upper surface of the laser cover (603), and a detection camera (606) for detecting laser lines is fixed on the side of the laser cover (603). A light shield (607) is symmetrically slidably connected to the laser cover (603), and the light shield (607) is slidably connected to the fixing frame (3). A vertical rod (608) is fixed at the lower end of the light shield (607), and the vertical rod (608) is slidably connected to the cylinder (609). The cylinder (609) is fixed on the limiting plate (5), and the distance between the two limiting plates (5) is equal to the distance between the two light shields (607).

5. The laser measuring device for splicing gaps of bamboo boards according to claim 3, characterized in that: The mounting plate (602) and the positioning block (610) are nested together, and the positioning block (610) is symmetrically fixed on the baffle (611). The width of the baffle (611) is smaller than the width of a single bamboo board. At the same time, the lower end face of the baffle (611) is uniformly equipped with first ball bearings (612), and the first ball bearings (612) contact and roll with the bamboo board.

6. The laser measuring device for splicing gaps of bamboo boards according to claim 5, characterized in that: A movable ring (613) is slidably connected to the positioning block (610), and a first spring (614) is fixed between the movable ring (613) and the baffle (611). A limit rod (615) is fixed on the movable ring (613), and the limit rod (615) is slidably connected to the positioning block (610). The limit rod (615) is engaged with the mounting plate (602).

7. The laser measuring device for splicing gaps of bamboo boards according to claim 1, characterized in that: The marking mechanism (7) includes a bracket (701) fixed to the fixed frame (3), and a servo motor (702) is fixed on the bracket (701). A lead screw (703) is fixed at the output end of the servo motor (702). The lead screw (703) is connected to the bracket (701) by a bearing. The lead screw (703) drives the movable block (704) to move back and forth. The movable block (704) and the guide rod (705) are slidably connected. The guide rod (705) is fixed on the bracket (701).

8. The laser measuring device for splicing gaps of bamboo boards according to claim 7, characterized in that: The lower end face of the movable block (704) is fixed with a third cylinder (706), and the output end of the third cylinder (706) is fixed with an ink box (707). An absorbent cotton (708) is installed at the lower end of the ink box (707), and the absorbent cotton (708) slides in contact with the marking roller (709). The marking roller (709) is connected to the ink box (707) by a bearing.

9. The laser measuring device for splicing gaps of bamboo boards according to claim 8, characterized in that: A fixing rod (710) is fixed on the ink cartridge (707), and a second ball bearing (711) is installed on the fixing rod (710). The second ball bearing (711) rolls in contact with the movable plate (712). At the same time, a sliding rod (713) is fixed on the upper surface of the movable plate (712). The sliding rod (713) is slidably connected to the bracket (701), and a second spring (714) is also fixed between the sliding rod (713) and the bracket (701).

10. The laser measuring device for splicing gaps of bamboo boards according to claim 9, characterized in that: The lower end face of the movable plate (712) is fixed with a toothed plate (715), and the toothed plate (715) and the toothed block (716) can be engaged to achieve positioning, and the toothed block (716) is fixed on the movable block (704).

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