A furniture production raw material wood defect detection device

Abstract

A kind of furniture production raw material wood defect detection device, including the connecting frame as bearing main body, detection mechanism for detecting whether wood exists defect is equipped on connecting frame, and feeding mechanism is equipped on both sides of detection mechanism;The detection mechanism includes the detection box fixed on the connecting frame, detection box is connected with light-shielding curtain at inlet and outlet side, detection box is equipped with detector, and the image of both sides of wood is obtained by detector and is judged to defect;Detection box is provided with the connecting support fixed on the connecting frame at wood outlet side, connecting support is connected with cylinder, and the marking head is connected on the telescopic end of cylinder, and marking head is connected with pigment by feeding pipe.The clear image of both sides of wood is obtained by detector in the present application to accurately judge its defect, and determination result is marked on wood.

Description

Technical Field

[0001] This invention relates to the field of wood testing, and more particularly to a device for detecting defects in wood used in furniture production. Background Technology

[0002] In modern furniture manufacturing, wood is the main raw material, and its quality directly affects the quality and durability of the final product. However, during the growth, harvesting, transportation and processing of wood, it is inevitably affected by various natural factors or human operations, resulting in a variety of defects such as cracks, knots, decay, and insect infestation. Therefore, it is particularly important to conduct comprehensive and accurate defect detection on wood before it enters the production process.

[0003] Current timber defect detection methods typically involve placing the timber on a detection device and then using the device's conveying mechanism to move the timber while simultaneously conducting the detection. However, most current detection devices can only detect timber and cannot mark it after detection. This can easily lead to confusion in subsequent classification and management processes, increasing the difficulty and error rate of manual identification. Furthermore, the vibration generated during transportation can easily damage the timber, affecting the accuracy and efficiency of the detection, accelerating the wear and tear of equipment components, shortening the equipment's lifespan, and making it inconvenient to use.

[0004] Therefore, it is necessary to design a defect detection device for furniture production raw material wood that can perform double-sided inspection and marking on wood of different specifications during transportation, while limiting and reducing the vibration of the wood during transportation, so as to facilitate subsequent classification and management, prevent wood damage, extend the service life of equipment, and improve the accuracy and efficiency of inspection. Summary of the Invention

[0005] To overcome the shortcomings of current equipment, which cannot mark wood after inspection, easily leading to confusion in subsequent classification and management, increasing the difficulty and error rate of manual identification, and easily causing damage to wood during transportation, affecting the accuracy and efficiency of inspection, and shortening the service life of the equipment, this invention provides a furniture production raw material wood defect detection device that can perform double-sided inspection and marking on wood of different specifications during transportation, while simultaneously limiting and damping the wood during transportation. This facilitates subsequent classification and management, prevents wood damage, extends the service life of the equipment, and improves the accuracy and efficiency of inspection.

[0006] A defect detection device for furniture manufacturing raw material wood includes a connecting frame as the main support, a detection mechanism for detecting defects in the wood on the connecting frame, and feeding mechanisms on both sides of the detection mechanism. The detection mechanism includes a detection box fixed on the connecting frame, with light-blocking curtains connected to the inlet and outlet sides of the detection box. A detector is installed inside the detection box, and supplementary lights are connected to the upper and lower sides of the detection box. The detector acquires images of both sides of the wood and judges its defects. A connecting bracket fixed on the connecting frame is provided on the wood outlet side of the detection box, and a cylinder is connected to the connecting bracket. Marking heads are connected to the telescopic ends of the cylinders, and the marking heads are connected to pigments through the feed pipe.

[0007] Preferably, the connecting frame is equipped with an adjustment mechanism for centering the timber. This adjustment mechanism includes a fixed support frame, a dual-axis motor, lead screws, a movable frame, and a guide rail. The fixed support frame and guide rail are arranged side-by-side on the connecting frame. The dual-axis motor is connected to the fixed support frame, and each of the motor's two output shafts is connected to a lead screw. The lead screws are rotatably connected to the fixed support frame and threadedly connected to one leg of the movable frame. The other leg of the movable frame is slidably mounted on the guide rail. When timber of different sizes is placed on the conveyor belt, the dual-axis motor starts, driving the corresponding lead screw to rotate. Under the action of the thread, the corresponding movable frame moves inward simultaneously along the fixed support frame and the guide rail, thereby centering the timber.

[0008] Preferably, the movable frame is equipped with rollers that can rotate in their original position. When the rollers come into contact with the wood, they guide the wood and prevent it from getting stuck.

[0009] Preferably, the feeding mechanism uses a conveyor belt to transport the timber. Conveyor belts have the advantages of low cost and long transmission distance.

[0010] Preferably, the feed side of the detection box is equipped with a flattening mechanism on the adjusting mechanism. The flattening mechanism includes a connecting frame, a positioning sensor, a hydraulic cylinder, a connecting rod, a rack, a gear, a connecting support frame, a guide roller frame, and a spring. The connecting frame is connected to the outer side of the moving frame, the positioning sensor is connected to the inner side of the connecting frame, and the hydraulic cylinder is connected to the outer side. The connecting rod is connected to the telescopic end of the hydraulic cylinder. The connecting rod is slidably connected to the adjacent connecting frame. A rack is connected to the upper side of the connecting rod. A connecting support frame is rotatably connected to the connecting frame. A gear is connected to the lower part of the connecting support frame, and the gear meshes with the rack. A guide roller frame is slidably connected to the upper part of the connecting support frame, and a spring connects the guide roller frame to the connecting support frame. This design aims to compress the wood passing through the detection box, allowing the detector to acquire clear images of both sides of the wood for accurate defect identification.

[0011] Preferably, an adjustment mechanism is also provided on the discharge side of the test box near the marking head. This is designed to flatten and stabilize the wood when the marking head marks it, preventing the vibrating wood from directly impacting the marking head and causing damage.

[0012] Preferably, the feed side of the testing box is equipped with a cleaning mechanism, which includes a fixed bracket, a cleaning nozzle, and a shielding frame. The fixed bracket is connected to the left side of the connecting frame on the right side. The fixed brackets are all folded, and the cleaning nozzle is connected to the fixed bracket. The movable frame on the feed side is connected to shielding frames on its opposite sides, and the shielding frames are in contact with the cleaning nozzle. Before the wood enters the testing box, the air pump is activated to allow gas to enter the cleaning nozzle and remove impurities that fall on the surface of the wood.

[0013] Beneficial effects: Compared with the prior art, the present invention has the following technical effects:

[0014] 1. This invention uses a conveyor belt to transport wood to a testing box for testing. During transport, the wood is limited by a guide roller frame. The screw rotates, and the moving frame moves inward under the action of the thread, so that the rollers come into contact with the wood, thereby pushing the wood to move and center it, preventing the wood from shifting and improving the stability of use.

[0015] 2. The present invention has a flat pressing mechanism on both sides of the detection box. The flat pressing mechanism on the feeding side presses the wood entering the detection box, so that the detector can obtain clear images of both sides of the wood for accurate defect judgment. The flat pressing mechanism on the discharging side is designed to flatten and stabilize the wood when the marking head marks it, so as to prevent the vibrating wood from directly hitting the marking head and causing damage.

[0016] 3. This invention uses gas to enter a cleaning nozzle and spray it out, thereby blowing away dust or impurities on the surface of the wood for cleaning. This allows for the cleaning of dust or impurities on the surface of the wood before testing, making it easier to accurately identify and assess defects on the surface of the wood, reducing the false judgment rate, and further improving the accuracy and reliability of the test. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a schematic diagram of the first partial three-dimensional structure of the present invention.

[0019] Figure 3 This is a schematic diagram of the second partial three-dimensional structure of the present invention.

[0020] Figure 4 This is a three-dimensional structural diagram of the detection mechanism of the present invention.

[0021] Figure 5 This is a partial three-dimensional cross-sectional view of the detection mechanism of the present invention.

[0022] Figure 6 This is a partial three-dimensional structural diagram of the detection mechanism of the present invention.

[0023] Figure 7 This is a partial three-dimensional structural schematic diagram of the adjustment mechanism of the present invention.

[0024] Figure 8 This is a three-dimensional structural diagram of the adjustment mechanism of the present invention.

[0025] Figure 9 This is a three-dimensional structural diagram of the cleaning mechanism of the present invention.

[0026] Figure 10 This is a schematic diagram of the first three-dimensional structure of the flat pressing mechanism of the present invention.

[0027] Figure 11 This is a schematic diagram of a second three-dimensional structure of the flattening mechanism of the present invention.

[0028] Figure 12 This is a schematic diagram of the third three-dimensional structure of the flattening mechanism of the present invention.

[0029] In the attached diagram, the following are the reference numerals: 1-connecting frame, 2-motor, 3-rotating shaft, 4-conveyor belt, 5-conveyor belt, 6-detection mechanism, 60-detection box, 61-sunshade curtain, 62-detector, 63-supplementary light, 64-connecting bracket, 65-cylinder, 66-marking head, 7-adjusting mechanism, 70-fixed support frame, 71-dual-axis motor, 72-lead screw, 73-moving frame, 74-guide rail, 8-cleaning mechanism, 80-fixed bracket, 81-cleaning nozzle, 82-shielding frame, 9-flattening mechanism, 90-connecting fixed frame, 91-position sensor, 92-hydraulic cylinder, 93-connecting fixed rod, 94-rack, 95-gear, 96-connecting support frame, 97-guide roller frame, 98-spring. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-12 The present invention will be further described in detail with reference to specific embodiments.

[0031] A defect detection device for furniture manufacturing raw material wood, see attached document. Figure 1-7 10-12 includes a detection mechanism 6 for detecting whether there are defects in the wood. One side serves as the feeding side, through which the wood to be tested enters the detection mechanism 6 for testing. After the testing is completed, it leaves through the discharge side on the other side.

[0032] The detection mechanism 6 is mounted on the connecting frame 1. Feeding mechanisms are located on both sides of the detection mechanism 6. Taking the feeding mechanism on the infeed side as an example, it includes a motor 2, a rotating shaft 3, a conveyor belt 4, and a conveyor belt 5. Two motors 2 are connected to the connecting frame 1 on the infeed side. Three rotating shafts 3 are also rotatably connected to the connecting frame 1. The output shafts of the motors 2 are connected to adjacent rotating shafts 3 via pulleys, and conveyor belts 4 are wound around them. Two conveyor belts 5 are wound between the three rotating shafts 3. When defect detection is required on the furniture production raw material wood, the wood is placed on the conveyor belt 5, and the motor 2 starts, driving the conveyor belt 5 forward. The wood moves forward under the frictional force between itself and the conveyor belt.

[0033] like Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, the detection mechanism 6 includes a detection box 60, a light-blocking curtain 61, a detector 62, and supplementary lights 63. The detection box 60 is fixed on the connecting frame 1. Light-blocking curtains 61 are connected to both the left and right sides of the detection box 60. The detector 62 is installed inside the detection box 60, and supplementary lights 63 are connected to both the top and bottom sides of the detection box 60. When the wood to be inspected moves into the detection box 60, the supplementary lights 63 illuminate both sides of the wood, and the detector 62 acquires images of both sides of the wood and judges its defects.

[0034] After the detector 62 obtains the defect detection conclusion of the current wood, the wood needs to be marked in order to screen out unqualified wood and prevent it from entering the subsequent process. In this embodiment, the technical purpose is achieved by coloring and marking one side of the wood. Specifically, the detection mechanism 6 also includes a connecting bracket 64, a cylinder 65 and a marking head 66. The detection box 60 is provided with a connecting bracket 64 fixed on the connecting frame 1 on the wood discharge side. The connecting bracket 64 is I-shaped and has two cylinders 65 connected to it. Each cylinder 65 has a marking head 66 connected to its telescopic end. The upper part of the marking head 66 has a feed pipe on the side that is far apart from each other, which is convenient for external pigment connection.

[0035] In this embodiment, different colored pigments are connected to the feed pipes, allowing the pigments to enter the marking head 66. When a defect is detected in the wood, the cylinder 65 at the front of the connecting bracket 64 is activated. The connecting brackets 64 are all I-shaped. The cylinder 65 drives the corresponding marking head 66 downward until it contacts the wood, so that the pigment is applied to the wood to mark it as defective. When no defect is detected in the wood, the cylinder 65 at the rear of the connecting bracket 64 is activated. The cylinder 65 drives the corresponding marking head 66 to move and contact the wood, so that the pigment is applied to the wood to mark it as acceptable.

[0036] In actual manufacturing processes, the size of the timber varies depending on the model. To ensure stable movement of the timber on the conveyor belt 5, this embodiment includes an adjustment mechanism 7 on the connecting frame 1 for centering timber of different specifications during transport. Specifically, as shown... Figure 1 , Figure 7 and Figure 8 As shown, the adjustment mechanism 7 includes a fixed support frame 70, a dual-axis motor 71, a lead screw 72, a movable frame 73, and a guide rail 74; the connecting frame 1 is connected to the parallel fixed support frame 70 and the guide rail 74, the fixed support frame 70 is connected to the dual-axis motor 71, and both output shafts of the dual-axis motor 71 are connected to lead screws 72, which are rotatably connected to the fixed support frame 70; the lead screw 72 is threadedly connected to one leg of the movable frame 73, and the other leg of the movable frame 73 is slidably mounted on the guide rail 74.

[0037] When timber of different sizes is placed on conveyor belt 5, dual-shaft motor 71 starts and drives corresponding lead screw 72 to rotate. Under the action of the screw, the corresponding moving frame 73 moves inward along the fixed support frame 70 and guide rail 74 at the same time, thereby pushing the timber to move and center.

[0038] In this embodiment, when adjusting the centering of timber of different sizes using the adjusting mechanism 7, the movable frames 73 on both sides should just contact the edge of the timber to avoid obstructing its movement. Preferably, the movable frame 73 is equipped with rollers 731 that can rotate in their original position, guiding the timber when the rollers 731 contact it.

[0039] As described above, this embodiment uses a conveyor belt 5 to transport wood. Conveyor belts have advantages such as low cost and long transport distance, making them suitable for wood transport. However, they also have vibration characteristics. In this embodiment, an inspection instrument 62 is needed to acquire images of both sides of the wood and determine defects. The vibrating conveyor belt 5 causes the wood being transported to vibrate as well, potentially blurring the images of both sides of the wood acquired by the inspection instrument 62, thus making accurate judgments impossible. Therefore, this embodiment uses a flat pressing mechanism 9 to press the wood passing through the inspection box 60.

[0040] The pressure-regulating mechanism 9 is mounted on the adjusting mechanism 7, such as... Figure 1 , Figure 10 , Figure 11 and Figure 12As shown, the flattening mechanism 9 includes a connecting fixed frame 90, a positioning sensor 91, a hydraulic cylinder 92, a connecting fixed rod 93, a rack 94, a gear 95, a connecting support frame 96, a guide roller frame 97, and a spring 98. The connecting fixed frame 90 is connected to the outside of the movable frame 73, and the positioning sensor 91 is connected to the inside of the connecting fixed frame 90. The hydraulic cylinder 92 is connected to the outside of the connecting fixed frame 90. The connecting fixed rod 93 is connected to the telescopic end of the hydraulic cylinder 92. The connecting fixed rod 93 is slidably connected to the adjacent connecting fixed frame 90. Two racks 94 are connected to the upper side of the connecting fixed rod 93. The connecting support frame 96 is rotatably connected to the connecting fixed frame 90. The gear 95 is connected to the lower part of the connecting support frame 96. The gear 95 meshes with the rack 94. The guide roller frame 97 is slidably connected to the upper part of the connecting support frame 96. The guide roller frame 97 is connected to the connecting support frame 96 with a spring 98.

[0041] It should be noted that, in this embodiment, an adjustment mechanism 7 is also provided on the discharge side of the detection box 60, near the marking head 66 of the detection mechanism 6. This mechanism is designed to flatten and stabilize the wood when the marking head 66 marks it, so as to prevent the vibrating wood from directly impacting the marking head 66 and causing damage to it.

[0042] In this embodiment, when the detector 62 performs defect detection on both sides of the wood, it is necessary to isolate the interference of the external environment, such as filamentous impurities falling on the wood. In this embodiment, a cleaning mechanism 8 is provided on the feeding side of the detection box 60 to remove impurities falling on the surface of the wood. After being cleaned, the wood enters the detection box 60. The detection box 60 is kept closed at the entry and exit positions by a light-shielding curtain 61 to prevent the cleaned wood from being interfered with by impurities inside the detection box 60.

[0043] like Figure 1 and Figure 9 As shown, the cleaning mechanism 8 includes a fixed bracket 80, a cleaning nozzle 81, and a shielding frame 82. The fixed bracket 80 is connected to the left side of the right side of the connecting frame 1. All fixed brackets 80 are folded, and the cleaning nozzle 81 is connected to the fixed bracket 80. The moving frame 73 on the feeding side is connected to the shielding frame 82 on the opposite side, and the shielding frame 82 is in contact with the cleaning nozzle 81. Before the wood enters the detection box 60, the air pump is activated, causing gas to enter the cleaning nozzle 81 and be sprayed out from the unshielded air outlet, blowing away dust or impurities on the surface of the wood away from the detection box 60.

[0044] Finally, the working principle of the furniture production raw material wood defect detection device of the present invention will be described as follows.

[0045] When it is necessary to detect defects in the raw wood used for furniture production, this device can be used. The connecting frame 1 is brought into contact with the ground, and the wood is placed on the conveyor belt 5. Then, the dual-axis motor 71 on the right is started, which drives the corresponding lead screw 72 to rotate. On one hand, under the action of the screw, the corresponding moving frame 73 moves inward along the fixed support frame 70 and the guide rail 74, so that the rollers on the moving frame 73 come into contact with the wood, thereby pushing the wood to move and center. On the other hand, the movement of the moving frame 73 also drives the shielding frame 82 to move. The shielding frame 82 blocks part of the cleaning nozzle 81, so that part of the air outlet on the nozzle 81 is blocked, which is suitable for boards of different lengths.

[0046] Next, the motors 2 on both sides are started simultaneously. The motors 2 drive the pulleys to rotate, causing the conveyor belt 4 to rotate, which in turn causes the rotating shaft 3 to rotate, so that the conveyor belt 5 transports the wood. When the wood moves past the positioning sensor 91, the positioning sensor 91 sends a signal to trigger the hydraulic cylinder 92. The hydraulic cylinder 92 drives the connecting fixing rod 93 to move outward at the same time, causing the rack 94 on the connecting fixing rod 93 to move outward. The rack 94 and the gear 95 mesh with each other, causing the corresponding gear 95 to rotate 90 degrees, which in turn drives the corresponding connecting support frame 96 to rotate 90 degrees, so that the guide roller frame 97 comes into contact with the wood. At the same time, the spring 98 is compressed. The deformation of the spring 98 generates pressure on the wood, flattening the wood and the conveyor belt 5 on the platform between the conveyor belt 5. This flattens the wood and suppresses its vibration. At this time, the elasticity increases the friction between the wood and the conveyor belt 5, and the wood can then stably enter the detection box 60 under the action of the rollers on the guide roller frame 97.

[0047] Before the wood enters the inspection box 60, the air pump is activated, allowing gas to enter the cleaning nozzle 81 and spray out from the unobstructed outlet, blowing away dust or impurities from the wood surface. The cleaned wood then continues to move into the inspection box 60, where the light-blocking curtain 61 is lifted, and the supplementary light 63 is activated for illumination. The inspection instrument 62 performs defect detection on both sides of the wood, and the detection results send a trigger signal to the flattening mechanism 9 on the discharge side, causing it to press the inspected wood back onto the conveyor belt 5 for marking. When a defect is detected, the cylinder 65 at the front of the connecting bracket 64 is activated, moving the corresponding marking head 66 to contact the wood and applying pigment for a defect mark. When no defects are detected, the cylinder 65 at the rear of the connecting bracket 64 is activated, moving the corresponding marking head 66 to contact the wood and applying pigment for a pass mark.

[0048] After marking, the cylinder 65 reverses its operation, causing the marking head 66 to move in the opposite direction and reset. At the same time, the flat pressing mechanism 9 resets, releasing the wood, so that the wood continues to be conveyed by the conveyor belt 5 on the discharge side.

[0049] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A defect detection device for wood used in furniture production, comprising a connecting frame (1) as the main support, a detection mechanism (6) for detecting whether the wood has defects on the connecting frame (1), and feeding mechanisms on both sides of the detection mechanism (6); characterized in that: The detection mechanism (6) includes a detection box (60) fixed on the connecting frame (1). The detection box (60) is connected to a light-blocking curtain (61) on both the inlet and outlet sides. The detection box (60) is equipped with a detector (62). The detection box (60) is connected to supplementary lights (63) on both the upper and lower sides. The detector (62) acquires images of both sides of the wood and judges its defects. The detection box (60) is provided with a connecting bracket (64) fixed on the connecting frame (1) on the outlet side of the wood. A cylinder (65) is connected to the connecting bracket (64). A marking head (66) is connected to the telescopic end of the cylinder (65). The marking head (66) is connected to pigment through the feed pipe. The connecting frame (1) is provided with an adjustment mechanism (7) for centering the wood. The adjustment mechanism (7) includes a fixed support frame (70), a dual-axis motor (71), a lead screw (72), a movable frame (73), and a guide rail (74). The fixed support frame (70) and the guide rail (74) are arranged side by side on the connecting frame (1). The dual-axis motor (71) is connected to the fixed support frame (70). The two output shafts of the dual-axis motor (71) are connected to lead screws (72). The lead screws (72) are rotatably connected to the fixed support frame (70). The lead screws (72) are threadedly connected to one leg of the movable frame (73). The other leg of the movable frame (73) is slidably mounted on the guide rail (74).

2. The furniture manufacturing raw material wood defect detection device according to claim 1, characterized in that: The movable frame (73) is equipped with rollers (731) that can rotate in the original position.

3. The furniture production raw material wood defect detection device according to claim 2, characterized in that: The feeding mechanism uses a conveyor belt (5) to transport the wood.

4. The furniture production raw material wood defect detection device according to claim 3, characterized in that: The feed side of the detection box (60) is provided with a flattening mechanism (9) on the adjustment mechanism (7); The flattening mechanism (9) includes a connecting fixing frame (90), a positioning sensor (91), a hydraulic cylinder (92), a connecting fixing rod (93), a rack (94), a gear (95), a connecting support frame (96), a guide roller frame (97), and a spring (98); the outer side of the movable frame (73) is connected to the connecting fixing frame (90), the inner side of the connecting fixing frame (90) is connected to the positioning sensor (91), and the outer side is connected to the hydraulic cylinder (92). The connecting fixing rod is connected to the telescopic end of the hydraulic cylinder (92). 93), the connecting fixing rod (93) is slidably connected to the adjacent connecting fixing frame (90), the upper side of the connecting fixing rod (93) is connected to the rack (94), the connecting fixing frame (90) is rotatably connected to the connecting support frame (96), the lower part of the connecting support frame (96) is connected to the gear (95), the gear (95) and the rack (94) mesh with each other, the upper part of the connecting support frame (96) is slidably connected to the guide roller frame (97), and the guide roller frame (97) and the connecting support frame (96) are connected to the spring (98).

5. The furniture manufacturing raw material wood defect detection device according to claim 4, characterized in that: An adjustment mechanism (7) is also provided on the discharge side of the detection box (60) near the marking head (66).

6. The furniture manufacturing raw material wood defect detection device according to any one of claims 1-5, characterized in that: The detection box (60) is provided with a cleaning mechanism (8) on the feeding side. The cleaning mechanism (8) includes a fixed bracket (80), a cleaning nozzle (81) and a shield (82). The fixed bracket (80) is connected to the left side of the right side of the connecting frame (1). The fixed brackets (80) are all folded. The cleaning nozzle (81) is connected to the fixed bracket (80). The moving frame (73) on the feeding side is connected to the shield (82) on the side that is far away from each other. The shield (82) is in contact with the cleaning nozzle (81).

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