A feeding device for a wood board gluing machine
By integrating a dust removal and detection device and an industrial camera into the feeding device of a wood board gluing machine, the problem of detecting impurities and defects on the board surface is solved, the gluing quality and yield are improved, and an automated and stable feeding process is achieved.
Patent Information
- Application Number
- CN202522410815.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-13
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-11-13
AI Technical Summary
Existing automatic feeding devices cannot effectively remove impurities and detect surface defects during the glue application process of wood panels, resulting in a decline in glue application quality and a decrease in yield.
A feeding device for a wood board gluing machine was designed, including a lifting platform, a pushing mechanism, a dust removal and inspection device, and an industrial camera. Impurities are removed through the dust removal suction port and surface defects are detected by the industrial camera, thus achieving automated dust removal and inspection.
It improves the quality of adhesive application and yield, reduces adhesive waste, ensures the appearance quality and structural performance of the finished product, and enhances the stability and applicability of the feeding process.
Smart Images

Figure CN224938507U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wood processing technology, and in particular to a feeding device for a wood gluing machine. Background Technology
[0002] In the field of wood processing, the glue application process is a key preliminary step for splicing and assembling boards. The efficiency of material loading and the quality of board surface pretreatment before glue application directly determine the uniformity of subsequent glue application and the structural strength of the final product.
[0003] Currently, the feeding method of wood board gluing machines has gradually evolved from traditional manual handling to automated feeding. Most automated feeding devices on the market use conveyor belts, robotic arms, and other structures to achieve continuous conveying of boards, effectively reducing labor intensity and improving feeding efficiency. For example, Chinese patent CN 211687268 U proposes a lifting wood board feeding device, which uses a lifting platform composed of a hydraulic lift and a placement frame, along with a pushing structure consisting of a pushing cylinder, a first pushing plate, and a second pushing plate, to achieve horizontal pushing of wood boards. Another example is a stacked wood board feeding device proposed by Chinese patent CN 221836224 U, which also uses a lifting component and a pushing component to push the wood boards one by one onto a conveyor.
[0004] However, the existing automatic feeding device has the following defects when working with the glue coating machine: (1) Impurities on the board surface affect the glue coating quality: During the processing and storage of wood boards, wood chips, dust and other impurities are easily attached to their surface. After the impurities enter the glue coating process with the board, they will cause the glue to not adhere tightly to the board surface, resulting in glue leakage points, bubbles and other problems, which will reduce the product qualification rate. (2) It is difficult to detect board surface defects in a timely manner: Wood boards may have surface defects such as cracks, dents and missing corners during the early processing. If boards with such defects are directly put into the glue coating process, it will not only waste glue and subsequent processing costs, but also affect the appearance and performance of the finished product.
[0005] Therefore, there is an urgent need for a feeding device that can simultaneously perform dust removal and surface defect detection on the board surface during the automatic feeding process, in order to fill the gaps in the existing technology. Utility Model Content
[0006] This utility model proposes a feeding device for a wood board gluing machine, which solves the problem that existing automatic feeding devices cannot perform dust removal and surface defect detection on the wood board surface during the feeding process.
[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0008] A feeding device for a wood board gluing machine includes a lifting platform for placing wood boards and a pushing mechanism for pushing the wood boards one by one to the feed inlet of the gluing machine. Both the lifting platform and the pushing mechanism are connected to a controller. The device also includes a detection and dust removal device located between the lifting platform and the gluing machine. The detection and dust removal device includes a mounting frame, a detection component, and a dust removal component. The mounting frame includes a side plate, a top plate, and a bottom plate. The side plate is fixedly installed on the ground and connected to the horizontally arranged top and bottom plates. The top plate is located directly above the bottom plate, and the two are spaced apart to form a feeding mechanism for the wood boards. The conveying channel is as follows: The detection component includes an alarm and two sets of industrial cameras, which are respectively installed on the bottom surface of the top plate and the top surface of the bottom plate. The alarm is installed on a mounting bracket. The dust removal component includes an upper dust removal port, a lower dust removal port, and a dust removal host. The upper dust removal port is installed on the bottom surface of the top plate, and the lower dust removal port is installed on the top surface of the bottom plate. The dust removal host is connected to the upper and lower dust removal ports through connecting pipes. The industrial cameras, alarm, and dust removal host are all connected to the controller.
[0009] Furthermore, the lifting platform is a scissor lift platform, installed in an installation slot opened in the ground.
[0010] Furthermore, the top plate bottom surface and the bottom plate top surface of the mounting bracket are each provided with a plurality of compensation light sources, and the compensation light sources are connected to the controller.
[0011] Furthermore, the industrial camera and the compensation light source are closer to the lifting platform than the upper and lower dust suction ports.
[0012] Furthermore, the pushing mechanism includes a straight track, a traveling device, a pushing beam, and a drive arm; the straight track is fixedly installed on the ground by support feet and is located on one side of the lifting platform, with its length direction parallel to the pushing direction of the wooden planks; the traveling device is installed on the straight track and can move back and forth along the straight track; the pushing beam is connected to the traveling device and is horizontally arranged, with its length direction perpendicular to the length direction of the straight track; the drive arm is installed on the pushing beam, and its end away from the pushing beam is provided with a push plate for pushing the top layer of wooden planks on the lifting platform.
[0013] Furthermore, the walking device is a rack and pinion walking machine, which includes a movable seat, a drive motor, and a gear; the movable seat is slidably mounted on the straight track, the straight track is provided with a rack, the drive motor is mounted on the movable seat and connected to the gear, the gear meshes with the rack, the push beam is connected to the movable seat; the drive motor is connected to the controller.
[0014] Furthermore, the drive arm is L-shaped.
[0015] Furthermore, the push beam is hinged to the movable seat via a first hinge, the axis of which is parallel to the straight track; a column is vertically mounted on the movable seat, and an electrically controlled telescopic component is provided between the column and the push beam; the upper end of the electrically controlled telescopic component is hinged to the upper end of the column via a second hinge, and the lower end of the electrically controlled telescopic component is hinged to the push beam via a third hinge; the axes of the second and third hinges are both parallel to the first hinge.
[0016] Furthermore, the electrically controlled telescopic component is a cylinder or an electric push rod.
[0017] Furthermore, the drive arm includes a connecting sleeve, a fixed block, a movable block, and an adjusting screw; the connecting sleeve is detachably sleeved on the push beam and locked with bolts; the fixed block is vertically arranged, with its top connected to the connecting sleeve, and the movable block is vertically arranged and spaced apart from the fixed block; a connecting rod is provided between the fixed block and the movable block, and the two ends of the connecting rod are respectively hinged to the fixed block and the movable block through a rotating shaft, the rotating shaft being horizontally arranged and perpendicular to the axis of the first hinge; the adjusting screw passes through the movable block and is threadedly connected to the movable block, one end of the adjusting screw is rotatably connected to the fixed block, and the other end is provided with a knob; the push plate is arranged on the lower part of the movable block away from the fixed block, and the end of the push plate away from the movable block is inclined upwards.
[0018] By adopting the above technical solution, this utility model has the following beneficial effects:
[0019] 1. This utility model, by setting up a dust removal detection device between the lifting platform and the glue applicator, can simultaneously complete the dust removal operation on the board surface during the feeding process of wood boards. The dust removal suction ports set symmetrically on the upper and lower sides adsorb and remove impurities such as sawdust and dust on the upper and lower surfaces of the wood boards, effectively preventing impurities from entering the glue application process with the board, which would cause problems such as loose glue adhesion, leaks and bubbles, and significantly improve the glue application quality and product qualification rate.
[0020] 2. This utility model utilizes two sets of industrial cameras in the detection and dust removal device to collect images of the upper and lower surfaces of the wood board. By linking the controller with the alarm, it can promptly detect surface defects such as cracks, dents, and missing corners during the board feeding stage, preventing defective boards from entering the subsequent gluing process, reducing waste of glue and processing costs, and ensuring the appearance quality and structural performance of the finished product.
[0021] 3. The walking device of this utility model adopts a rack and pinion walking machine structure. The moving seat is driven by the meshing of gears and racks. Compared with conventional conveyor belts or cylinder pushing methods, the transmission accuracy is higher and the operation is more stable. It can ensure that the position of the wooden board is accurate during the pushing process, avoid blind spots in detection or incomplete dust removal due to pushing deviation, and further ensure the stability of feeding and pretreatment.
[0022] 4. The pushing mechanism of this utility model adopts an adjustable structure design. The pushing beam can be driven to rotate and adjust the angle around the first hinge through the electronically controlled telescopic component. Combined with the height and spacing adjustment function of the driving arm, it can adapt to the pushing needs of wood boards of different thicknesses and specifications, solve the problem of the single adaptability of traditional pushing mechanisms, and improve the versatility and applicability of the device. Attached Figure Description
[0023] Figure 1 This is a front view of the feeding device for the wood board gluing machine according to Embodiment 1 of this utility model;
[0024] Figure 2 This is a top view of the feeding device for the wood board gluing machine according to Embodiment 1 of this utility model;
[0025] Figure 3 This is a front view of the dust removal detection device proposed in Embodiment 1 of this utility model;
[0026] Figure 4 This is a schematic diagram of the installation of the push beam proposed in Embodiment 2 of this utility model;
[0027] Figure 5 This is a schematic diagram of the installation of the drive arm according to Embodiment 2 of this utility model;
[0028] The components in the attached diagram are labeled as follows: 1-Pushing mechanism, 2-Straight track, 3-Walking device, 4-Pushing beam, 5-Drive arm, 6-Push plate, 7-Lifting platform, 8-Wooden board, 9-Glue applicator, 10-Controller, 11-Detection and dust removal device, 12-Mounting frame, 13-Conveying channel, 14-Alarm, 15-Industrial camera, 16-Compensation light source, 17-Upper dust removal suction port, 18-Lower dust removal suction port, 19-Dust removal host, 20-First hinge, 21-Column, 22-Electrically controlled telescopic component, 23-Second hinge, 24-Third hinge, 25-Connecting sleeve, 26-Bolt, 27-Fixing block, 28-Moving block, 29-Adjusting screw, 30-Connecting rod. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0030] Example 1
[0031] like Figure 1-3 As shown, a feeding device for a wood board gluing machine includes a lifting platform 7 for placing wood boards 8, a pushing mechanism 1 for pushing the wood boards 8 one by one to the feed inlet of the gluing machine 9, and a detection and dust removal device 11 disposed between the lifting platform 7 and the gluing machine 9. The lifting platform 7 is a scissor-type lifting platform, installed in an installation slot opened in the ground, which is a conventional existing setup.
[0032] The pushing mechanism 1 includes a straight track 2, a traveling device 3, a pushing beam 4, and a drive arm 5. The straight track 2 is fixed to the ground by support feet and is located on one side of the lifting platform 7, with its length direction parallel to the pushing direction of the wooden plank 8. The traveling device 3 is mounted on the straight track 2 and can move back and forth along the straight track 2. The pushing beam 4 is connected to the traveling device 3 and is horizontally arranged, with its length direction perpendicular to the length direction of the straight track 2. The drive arm 5 is mounted on the pushing beam 4, and its end away from the pushing beam 4 is provided with a push plate 6 for pushing the topmost wooden plank 8 on the lifting platform 7. In this embodiment, the drive arm 5 is L-shaped and two are spaced apart.
[0033] Specifically, the walking device 3 is a rack and pinion walking machine, which includes a movable seat, a drive motor, and gears. The movable seat is slidably mounted on the straight track 2, which is equipped with a rack. The drive motor is mounted on the movable seat and connected to the gears. The gears mesh with the rack, and the push beam 4 is connected to the movable seat. The walking device 3 of this utility model adopts a rack and pinion walking machine structure, which drives the movable seat to move through the meshing transmission of gears and racks. Compared with conventional conveyor belts or cylinder pushing methods, it has higher transmission accuracy and more stable operation, ensuring that the wooden board 8 is accurately positioned during the pushing process, avoiding blind spots in detection or incomplete dust removal due to pushing deviation, and further ensuring the stability of feeding and pretreatment.
[0034] The dust removal and detection device 11 includes a mounting frame 12, a detection component, and a dust removal component. The mounting frame 12 includes a side plate, a top plate, and a bottom plate. The side plate is fixedly installed on the ground and connected to the horizontally arranged top plate and bottom plate. The top plate is located directly above the bottom plate, and the two are spaced apart to form a conveying channel 13 through which the wooden board 8 passes.
[0035] The detection assembly includes an alarm 14 and two sets of industrial cameras 15. The two sets of industrial cameras 15 are respectively installed on the bottom surface of the top plate and the top surface of the bottom plate, and the alarm 14 is installed on the mounting bracket 12. The specific number of industrial cameras 15 in each set is determined according to the actual situation. In this embodiment, each set of industrial cameras 15 includes 3 industrial cameras 15.
[0036] The dust removal assembly includes an upper dust suction port 17, a lower dust suction port 18, and a dust removal main unit 19. The upper dust suction port 17 is installed on the bottom surface of the top plate, and the lower dust suction port 18 is installed on the top surface of the bottom plate. The dust removal main unit 19 is connected to the upper dust suction port 17 and the lower dust suction port 18 via connecting pipes. When the wooden board 8 passes through the conveyor channel 13, the upper dust suction port 17 and the lower dust suction port 18 respectively approach the upper and lower surfaces of the wooden board 8 to perform dust removal. Both the upper dust suction port 17 and the lower dust suction port 18 are elongated, flat, open structures.
[0037] The drive motors of the industrial camera 15, alarm 14, dust removal host 19, lifting platform 7, and pushing mechanism 1 are all connected to the controller 10. In this utility model, the detection component, dust removal component, pushing mechanism 1, and lifting platform 7 are all linked with the controller 10, realizing fully automated control of the entire process. There is no need for manual intervention in the conveying, detection, and dust removal operations of the board material. This not only reduces the intensity of manual labor but also avoids errors caused by manual operation, thereby improving the overall automation level and production stability.
[0038] In addition, several compensating light sources 16 are provided on the bottom surface of the top plate and the top surface of the bottom plate of the mounting bracket 12, and the compensating light sources 16 are connected to the controller 10. The industrial camera 15 and the compensating light sources 16 are closer to the lifting platform 7 than the upper dust suction port 17 and the lower dust suction port 18. The compensating light sources 16 provide stable and uniform light supplementation for the industrial camera 15 to acquire images of the wood board surface.
[0039] The working principle of this utility model is as follows: First, the wood boards to be processed are stacked on the lifting platform 7. The height of the lifting platform 7 is adjusted according to the remaining amount of the wood boards 8 to ensure that the top layer of wood boards 8 is in a suitable pushing position. Then, the pushing mechanism 1 connected to the controller 10 is activated. The drive motor of the rack and pinion walking machine drives the gear to move along the rack of the straight track 2, so that the moving seat drives the pushing beam 4 to move towards the lifting platform 7, thereby driving the drive arm 5 and the push plate 6 to push the top layer of wood boards 8 on the lifting platform 7. The pushed wood boards 8 enter the conveying channel 13 of the detection and dust removal device 11. At this time, the process... The camera 15 captures images of the upper and lower surfaces of the wooden board 8 and transmits them to the controller 10. The controller 10 analyzes the captured images. If surface defects are detected, the controller 10 controls the alarm 14 to perform an alarm action. In addition, the controller 10 keeps the dust removal host 19 in a normally open state and keeps it working continuously. It uses the upper dust removal port 17 and the lower dust removal port 18 to remove sawdust from the surface of the wooden board 8. Finally, the wooden board 8 that has passed the inspection and been dusted is continuously pushed to the feed port of the glue applicator 9 to complete a single feeding process. The lifting platform 7 adjusts its height synchronously to prepare for the next push.
[0040] In other embodiments, the working mode of the dust removal host 19 can also adopt the intelligent start mode. The industrial camera 15 identifies dust and impurities on the upper and lower surfaces of the wooden board 8. When dust and impurities are detected on the surface of the wooden board 8, the controller 10 starts the dust removal host 19 to avoid the waste of power caused by the continuous operation of the dust removal host 19.
[0041] This utility model, by setting up a dust removal device 11 between the lifting platform 7 and the glue applicator 9, can simultaneously complete the dust removal operation on the board surface during the feeding process of the wood board. The dust removal suction ports set symmetrically on the upper and lower sides can adsorb and remove impurities such as sawdust and dust from the upper and lower surfaces of the wood board 8, effectively avoiding the problem of poor glue adhesion, leakage and bubbles caused by impurities entering the glue application process with the board, and significantly improving the glue application quality and product qualification rate.
[0042] This invention utilizes two sets of industrial cameras 15 in the dust removal and detection device 11 to collect images of the upper and lower surfaces of the wooden board 8. The controller 10 is linked to the alarm 14 to promptly detect surface defects such as cracks, dents, and missing corners during the board feeding stage. This prevents defective boards from entering the subsequent gluing process, reduces waste of glue and processing costs, and ensures the appearance quality and structural performance of the finished product.
[0043] Example 2
[0044] like Figure 4 , 5 As shown, the difference between this embodiment and embodiment 1 lies in the installation method of the push beam 4 and the specific structural design of the drive arm 5.
[0045] In this embodiment, the push beam 4 is hinged to the movable seat via a first hinge 20, the axis of which is parallel to the straight track 2. A column 21 is vertically mounted on the movable seat, and an electrically controlled telescopic component 22 is positioned between the column 21 and the push beam 4. The upper end of the electrically controlled telescopic component 22 is hinged to the upper end of the column 21 via a second hinge 23, and the lower end is hinged to the push beam 4 via a third hinge 24. The axes of both the second hinge 23 and the third hinge 24 are parallel to the first hinge 20. The electrically controlled telescopic component 22 is a cylinder; in other embodiments, it is an electric push rod. The push beam 4 can be tilted up and down to adjust its angle under the drive of the electrically controlled telescopic component 22, adapting to the conveying posture of the plate to ensure accurate pushing direction.
[0046] In addition, the drive arm 5 includes a connecting sleeve 25, a fixed block 27, a movable block 28, and an adjusting screw 29. The connecting sleeve 25 is detachably fitted onto the push beam 4 and locked by bolts 26. The fixed block 27 is vertically arranged, with its top connected to the connecting sleeve 25. The movable block 28 is vertically arranged and spaced apart from the fixed block 27. A connecting rod 30 is provided between the fixed block 27 and the movable block 28. The two ends of the connecting rod 30 are respectively hinged to the fixed block 27 and the movable block 28 via rotating shafts. The rotating shafts are horizontally arranged and perpendicular to the axis of the first hinge 20. The adjusting screw 29 passes through the movable block 28 and is threadedly connected to the movable block 28. One end of the adjusting screw 29 is rotatably connected to the fixed block 27, and the other end is provided with a knob. The push plate 6 is located on the lower part of the movable block 28 away from the fixed block 27, with the end of the push plate 6 away from the movable block 28 inclined upwards.
[0047] In this embodiment, the drive arm 5 adjusts its height by driving the movable block 28 to move up and down through the adjusting screw 29, so that the contact point of the push plate 6 matches the upper side of the plate of different thicknesses. At the same time, the gap is adjusted by sliding the connecting sleeve 25 along the push beam 4 to cover the effective pushing range of plates of different widths.
[0048] As can be seen, the push mechanism 1 of this utility model adopts an adjustable structure design. The push beam 4 can be driven to rotate and adjust the angle around the first hinge 20 through the electronically controlled telescopic component 22. Combined with the height and spacing adjustment function of the drive arm 5, it can adapt to the push needs of wood boards of different thicknesses and specifications, solve the problem of the single adaptability of the traditional push mechanism 1, and improve the versatility and applicability of the device.
[0049] The above description is a detailed description of the preferred embodiments of the present utility model. However, the embodiments are not intended to limit the scope of the patent application of the present utility model. All equivalent changes or modifications made under the technical spirit of the present utility model should fall within the patent scope covered by the present utility model.
Claims
1. A feeding device for a wood board gluing machine, comprising a lifting platform for placing wood boards and a pushing mechanism for pushing the wood boards one by one to the feed inlet of the gluing machine, wherein both the lifting platform and the pushing mechanism are connected to a controller, characterized in that: It also includes a dust removal and detection device located between the lifting platform and the glue applicator; the dust removal and detection device includes a mounting frame, a detection component, and a dust removal component; the mounting frame includes a side plate, a top plate, and a bottom plate, the side plate is fixedly installed on the ground and connected to the horizontally arranged top plate and bottom plate, the top plate is located directly above the bottom plate, and the two are spaced apart to form a conveying channel for the wooden board to pass through; the detection component includes an alarm and two sets of industrial cameras, the two sets of industrial cameras are respectively installed on the bottom surface of the top plate and the top surface of the bottom plate, and the alarm is installed on the mounting frame; the dust removal component includes an upper dust removal suction port, a lower dust removal suction port, and a dust removal main unit, the upper dust removal suction port is installed on the bottom surface of the top plate, the lower dust removal suction port is installed on the top surface of the bottom plate, and the dust removal main unit is connected to the upper dust removal suction port and the lower dust removal suction port through a connecting pipe; the industrial cameras, the alarm, and the dust removal main unit are all connected to the controller.
2. The feeding device for a wood board gluing machine according to claim 1, characterized in that: The lifting platform is a scissor lift platform, installed in an installation slot opened in the ground.
3. The feeding device for a wood board gluing machine according to claim 1, characterized in that: The mounting bracket has several compensation light sources on the bottom surface of the top plate and the top surface of the bottom plate, and the compensation light sources are connected to the controller.
4. The feeding device for a wood board gluing machine according to claim 3, characterized in that: The industrial camera and the compensation light source are closer to the lifting platform than the upper and lower dust suction ports.
5. The feeding device for a wood board gluing machine according to claim 1, characterized in that: The pushing mechanism includes a straight track, a traveling device, a pushing beam, and a drive arm. The straight track is fixed to the ground by support feet and is located on one side of the lifting platform, with its length direction parallel to the pushing direction of the wooden planks. The traveling device is installed on the straight track and can move back and forth along the straight track. The pushing beam is connected to the traveling device and is horizontally arranged, with its length direction perpendicular to the length direction of the straight track. The drive arm is installed on the pushing beam, and its end away from the pushing beam is provided with a push plate for pushing the top layer of wooden planks on the lifting platform.
6. The feeding device for a wood board gluing machine according to claim 5, characterized in that: The walking device is a rack and pinion walking machine, which includes a movable seat, a drive motor, and a gear; the movable seat is slidably mounted on the straight track, the straight track is provided with a rack, the drive motor is mounted on the movable seat and connected to the gear, the gear meshes with the rack, the push beam is connected to the movable seat; the drive motor is connected to a controller.
7. The feeding device for a wood board gluing machine according to claim 5, characterized in that: The drive arm is L-shaped.
8. The feeding device for a wood board gluing machine according to claim 6, characterized in that: The push beam is hinged to the movable seat via a first hinge, the axis of which is parallel to the straight track. A column is vertically mounted on the movable seat, and an electrically controlled telescopic component is provided between the column and the push beam. The upper end of the electrically controlled telescopic component is hinged to the upper end of the column via a second hinge, and the lower end of the electrically controlled telescopic component is hinged to the push beam via a third hinge. The axes of the second and third hinges are both parallel to the first hinge.
9. The feeding device for a wood board gluing machine according to claim 8, characterized in that: The electrically controlled telescopic component is a cylinder or an electric push rod.
10. The feeding device for a wood board gluing machine according to claim 8, characterized in that: The drive arm includes a connecting sleeve, a fixed block, a movable block, and an adjusting screw. The connecting sleeve is detachably fitted onto the push beam and locked with bolts. The fixed block is vertically arranged, with its top connected to the connecting sleeve. The movable block is vertically arranged and spaced apart from the fixed block. A connecting rod is provided between the fixed block and the movable block, with both ends of the connecting rod hinged to the fixed block and the movable block respectively via a rotating shaft. The rotating shaft is horizontally arranged and perpendicular to the axis of the first hinge. The adjusting screw passes through the movable block and is threadedly connected to it. One end of the adjusting screw is rotatably connected to the fixed block, and the other end is provided with a knob. The push plate is located on the lower part of the movable block away from the fixed block, with the end of the push plate away from the movable block inclined upwards.
Citation Information
Patent Citations
Liftable wood board feeding device
CN211687268U
Stacked wood board feeding device
CN221836224U
