Thickness detection device and detection method for wooden door production

Abstract

The present invention relates to the technical field of wooden door production, and specifically discloses a thickness detection device and detection method for wooden door production, comprising: a base and a first guide rod, the number of the first guide rods is four, and the front and rear ends of the four first guide rods are respectively arranged at the front and rear sides, left and right ends, upper and lower sides of the base; an infrared distance measuring sensor, the number of the infrared distance measuring sensors is four, and the four infrared distance measuring sensors are respectively arranged at the top four corners of the base. This device realizes comprehensive, continuous and high-precision detection of the overall thickness of the wooden door, which can not only effectively cover the entire surface of the wooden door, but also record the thickness data of each point, and then read the thickness deviation, which not only significantly improves the quality control level in the wooden door production process, ensures the overall consistency and stability of the product from raw materials to finished products, but also greatly reduces the defective rate caused by uneven thickness, and improves production efficiency and finished product quality.

Description

Technical Field

[0001] The present invention relates to the technical field of wooden door production, and in particular to a thickness detection device and a detection method for wooden door production. Background Art

[0002] At present, there are many thickness detection devices for wooden door production on the market. Most of these devices use technical principles such as laser ranging, ultrasonic measurement or mechanical contact measurement to achieve rapid detection of local thickness of wooden doors. These devices have played a positive role in improving production efficiency and reducing manual errors, especially in single-point or local area detection on the production line, showing high accuracy and efficiency.

[0003] However, as consumers' requirements for product quality continue to increase, existing thickness detection equipment for wooden door production has gradually exposed its limitations. Specifically, most of these devices are limited to detecting the thickness of local areas of wooden doors, and it is difficult to fully cover the entire door surface. During the production process of wooden doors, they may be affected by multiple factors such as raw material differences, processing technology fluctuations (such as sawing accuracy, sanding uniformity), and changes in ambient temperature and humidity. As a result, the thickness of the same wooden door at different positions is inconsistent. This inconsistency is particularly evident in ordinary wooden door leaves (usually in the range of 35-50mm in thickness) and entrance door leaves (usually in the range of 50-100mm in thickness), and must be controlled within strict error standards (i.e., plus or minus 3mm) to ensure the overall quality of the product.

[0004] Therefore, the limitation of the existing technology is that it is unable to achieve comprehensive, continuous and high-precision detection of the overall thickness of wooden doors, which directly affects the quality control and yield rate of wooden door production. Especially in the high-end wooden door market, the pursuit of details and quality is more stringent. A device that can more comprehensively detect the thickness of wooden doors and promptly detect and correct thickness deviations is needed to meet the needs of industry development. Summary of the invention

[0005] The object of the present invention is to provide a thickness detection device and a detection method for wooden door production to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a thickness detection device for wooden door production, comprising a base and a first guide rod; the number of the first guide rods is four, and the front and rear ends of the four first guide rods are respectively arranged on the front and rear sides, left and right ends, and upper and lower sides of the base; the number of infrared distance measuring sensors is four, and the four infrared distance measuring sensors are respectively arranged at the four corners of the top of the base; the number of limit rods is twelve, and the twelve limit rods are divided into four groups of three each, and the four groups of limit rods are respectively arranged at the four corners of the top of the base; the number of screws is four, and the bottom ends of the four screws are rotatably arranged at the four corners of the top of the base through bearings; the number of splints is four, and the four splints are respectively slidably sleeved on the top ends of the outer walls of the four groups of limit rods, and the splints are screwed to the outer walls of the screws; the receiver is arranged on the outside of the bottom end of the splint, and the positions of the four receivers correspond to and match the positions of the four infrared distance measuring sensors; the number of moving mechanisms is two, and the two moving mechanisms are respectively arranged on the left and right sides of the base; the detection mechanism is arranged at the top of the base.

[0007] Preferably, in order to drive the movable plate to move, the movable mechanism includes: a motor, two motors, and the two motors are respectively screwed to the left and right front ends of the base; four connecting rods, one end of two connecting rods are rotatably arranged at the left and right rear ends of the base through bearings, and one end of the other two connecting rods are respectively locked to the output ends of the two motors through couplings; the sprocket is sleeved on the outer wall of the connecting rod and locked by a top screw; there are two chains, and the two ends of the two chains are respectively sleeved on the outer walls of the four sprockets; the sliding column is arranged at the inner front end of the chain.

[0008] Preferably, in order to drive the telescopic rod to move, the detection mechanism includes: a slider, there are four sliders, and the four sliders are respectively slidably connected to the front sides of the outer walls of the four first guide rods; a driving plate, there are two driving plates, the upper and lower ends of the two driving plates are respectively arranged on the inner sides of the four sliders, and a driving groove that penetrates left and right is opened in the up and down directions on the left side of the driving plate, and the sliding column can be slidably adapted and inserted in the middle of the inner cavity of the driving groove; the left and right sides of the movable plate are respectively arranged in the middle of the outer walls of the two driving plates.

[0009] Preferably, in order to read the thickness of the wooden door, the detection mechanism further includes: a sleeve, the number of the sleeves is several, and the several sleeves are respectively arranged at the top end of the movable plate at equal distances along the left and right directions, a movable groove connected to its inner cavity is opened in the middle of the front side of the sleeve along the up and down directions, and sliding grooves are opened in the up and down directions on the left and right sides of the outer wall of the sleeve, and scale lines are arranged on the outer wall of the sleeve; the upper and lower ends of the second guide rod are respectively arranged on the upper and lower sides of the inner cavity of the movable groove; the number of third guide rods is several, and the several third guide rods are divided into a group of two, and each The upper and lower ends of the two third guide rods of the group are respectively arranged on the upper and lower sides of the inner cavity of the slide groove; the telescopic rod can be slidably adapted and inserted into the inner cavity of the sleeve, and the bottom end of the telescopic rod can be slidably extended out of the bottom end of the movable plate; the roller is arranged at the bottom end of the telescopic rod; the spring is sleeved on the bottom end of the outer wall of the telescopic rod, the bottom end of the spring is clamped on the top end of the roller, and the top end of the spring is clamped on the bottom end of the movable plate; the push plate is arranged on the front side of the outer wall of the telescopic rod, the front side of the push plate can be slidably extended out of the inner cavity of the movable groove, and the push plate can be slidably sleeved on the outer wall of the second guide rod.

[0010] Preferably, in order to read the values ​​of the thickest and thinnest parts of the wooden door, the detection mechanism also includes: a first indicator piece, which is slidably adapted and inserted into the bottom end of the inner cavity of the slide groove, and the first indicator piece is slidably sleeved on the outer wall of the third guide rod, and the first indicator piece is located below the push plate and contacts the push plate; the second indicator piece is slidably adapted and inserted into the bottom end of the inner cavity of the slide groove, and the second indicator piece is slidably sleeved on the outer wall of the third guide rod, and the second indicator piece is located above the push plate and contacts the push plate; the number of spring clips is several, and the several spring clips are respectively arranged in the inner cavities of the several first indicator pieces and the second indicator pieces, and the spring clips are clamped on the outer wall of the third guide rod.

[0011] Preferably, in order to connect the first indicator sheet and the second indicator sheet together, the detection mechanism also includes: an iron block, which is arranged at the top of the first indicator sheet; an electromagnet is arranged at the bottom of the second indicator sheet, and the positions of the electromagnet and the iron block correspond and are in contact with each other.

[0012] Preferably, the vertical height of the inner cavity of the driving groove is greater than the vertical height of the chain.

[0013] The invention provides a thickness detection device and a detection method for wooden door production, which have the following beneficial effects:

[0014] 1. The present invention utilizes the cooperation between the clamping plate and the base to clamp and fix the wooden door on the top of the base, and utilizes the cooperation between the infrared distance measuring sensor and the receiver to detect the thickness of the wooden door.

[0015] 2. The present invention utilizes a motor to drive a sprocket to rotate through a connecting rod, thereby utilizing a chain to drive a sliding column to perform circumferential motion. The circumferential motion of the sliding column can cooperate with the driving groove to prompt the driving plate to drive the movable plate to perform back-and-forth reciprocating motion, and then the movable plate can drive the telescopic rod and the roller to perform back-and-forth reciprocating motion.

[0016] 3. In the present invention, when the roller moves to the thicker part of the wooden door, the roller can be used to squeeze the telescopic rod to move upward, and then the push plate can be used to push the second indicator piece upward; when the roller moves to the thinner part of the wooden door, the elastic force of the spring can push the telescopic rod to drive the push plate to move downward, and then the push plate can be used to push the first indicator piece downward, so that the thickness of the thickest part and the thinnest part of the wooden door can be numerically read, and then it can be determined whether the thickness of the wooden door is within the allowable thickness error range.

[0017] 4. This device realizes comprehensive, continuous and high-precision detection of the overall thickness of wooden doors. It can not only effectively cover the entire surface of the wooden doors, but also record the thickness data of each point, and then read the thickness deviation. It not only significantly improves the quality control level in the production process of wooden doors, ensuring the overall consistency and stability of products from raw materials to finished products, but also greatly reduces the defective rate caused by uneven thickness, and improves production efficiency and finished product quality. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 An exploded view of the present invention;

[0020] Figure 3 is a schematic diagram of the structure of the splint;

[0021] Figure 4 It is a structural diagram of the testing organization;

[0022] Figure 5 is a structural schematic diagram of a first indicator sheet;

[0023] Figure 6 is a schematic structural diagram of a second indicator sheet;

[0024] Figure 7 for Figure 2 A magnified image of point A;

[0025] Figure 8 for Figure 2 The enlarged view of point B;

[0026] Fig. 9 for Figure 4 Enlarged view of point C;

[0027] Fig.10 for Figure 4 Enlarged view of point D.

[0028] In the figure: 1, base; 2, first guide rod; 3, infrared ranging sensor; 4, limit rod; 5, screw; 6, clamping plate; 7, receiver; 8, moving mechanism; 81, motor; 82, connecting rod; 83, sprocket; 84, chain; 85, slide column; 9, detection mechanism; 91, slider; 92, drive plate; 93, drive slot; 94, moving plate; 95, sleeve; 96, moving slot; 97, slide slot; 98, second guide rod; 99, third guide rod; 910, scale line; 911, telescopic rod; 912, roller; 913, spring; 914, push plate; 915, first indicator sheet; 916, iron block; 917, second indicator sheet; 918, electromagnet; 919, spring clamp. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-Figure 10The present invention provides a technical solution for thickness detection equipment for wooden door production, including: a base 1, a first guide rod 2, an infrared distance sensor 3, a limit rod 4, a screw rod 5, a clamping plate 6, a receiver 7, a moving mechanism 8 and a detection mechanism 9. The number of the first guide rods 2 is four, and the front and rear ends of the four first guide rods 2 are respectively arranged on the front and rear sides, left and right ends, and upper and lower sides of the base 1. The first guide rod 2 is used to support a driving plate 92. The number of the infrared distance sensors 3 is four, and the four infrared distance sensors 3 are respectively arranged at the top four corners of the base 1. The infrared distance sensor 3 is a prior art and will not be described in detail here. The number of the limit rods 4 is twelve, and the twelve limit rods 4 are grouped into four groups of three each. The four groups of limit rods 4 are respectively arranged at the top four corners of the base 1. The number of the screw rods 5 is four, and the bottom ends of the four screw rods 5 are respectively rotatable through bearings. Placed at the four corners of the top end of the base 1, the rotational force generated by the rotation of the screw 5 can cause the splint 6 to move up and down. There are four splints 6, and the four splints 6 can be slidably sleeved on the top ends of the outer walls of the four groups of limit rods 4 respectively. The splints 6 are screwed on the outer walls of the screws 5, and the splints 6 are used to clamp and fix the wooden door. The receiver 7 is arranged on the outer side of the bottom end of the splint 6. The positions of the four receivers 7 correspond to the positions of the four infrared ranging sensors 3 respectively, and match them. The receiver 7 is the prior art and will not be described in detail here. The receiver 7 is used here to detect the thickness of the wooden door with the infrared ranging sensor 3. There are two moving mechanisms 8, and the two moving mechanisms 8 are respectively arranged on the left and right sides of the base 1. The moving mechanism 8 is used to drive the moving plate 94 to move. The detection mechanism 9 is arranged at the top end of the base 1, and the detection mechanism 9 is used to detect the thickness of the wooden door.

[0031] As a preferred solution, further, the moving mechanism 8 includes: a motor 81, a connecting rod 82, a sprocket 83, a chain 84 and a slide column 85. The number of motors 81 is two, and the two motors 81 are respectively screwed to the front ends of the left and right sides of the base 1. The motor 81 is a prior art, and the motor 81 is a servo motor. The motor 81 is connected to a servo controller, which will not be described in detail here. The motor 81 is used here to drive the sprocket 83 to rotate through the connecting rod 82. The number of connecting rods 82 is four, and one end of two connecting rods 82 can rotate through bearings. The movable ones are arranged at the left and right rear ends of the base 1, and one end of the other two connecting rods 82 is locked at the output ends of the two motors 81 through couplings respectively. The sprocket 83 is sleeved on the outer wall of the connecting rod 82 and locked by a top screw. There are two chains 84, and the two ends of the two chains 84 are respectively sleeved on the outer walls of the four sprockets 83. The chain 84 is used to drive the sliding column 85 to make circumferential motion. The sliding column 85 is arranged at the inner front end of the chain 84. The sliding column 85 and the driving groove 93 cooperate to prompt the driving plate 92 to drive the movable plate 94 to move back and forth.

[0032] As a preferred embodiment, further, the detection mechanism 9 includes: a slider 91, a drive plate 92, a drive groove 93, a movable plate 94, a sleeve 95, a movable groove 96, a slide groove 97, a second guide rod 98, a third guide rod 99, a scale line 910, a telescopic rod 911, a roller 912, a spring 913, a push plate 914, a first indicator sheet 915, an iron block 916, a second indicator sheet 917, an electromagnet 918 and a spring clip 919. There are four sliders 91, and the four sliders 91 are slidably connected to the front sides of the outer walls of the four first guide rods 2, respectively. There are two drive plates 92, and the upper and lower ends of the two drive plates 92 are respectively arranged on the inner sides of the four sliders 91, and the left side of the drive plate 92 is provided with a drive groove running through left and right in the up and down directions. 93, the sliding column 85 can be slidably adapted and inserted in the middle of the inner cavity of the driving groove 93, and the driving plate 92 can support the moving plate 94 and drive the moving plate 94 to move. The upper and lower heights of the inner cavity of the driving groove 93 are greater than the upper and lower heights of the chain 84, ensuring that the sprocket 83 can rotate smoothly. The left and right sides of the moving plate 94 are respectively arranged at the middle of the outer walls of the two driving plates 92. The moving plate 94 is used to support the telescopic rod 911. The number of sleeves 95 is several, and several sleeves 95 are respectively arranged at the top of the moving plate 94 at equal distances along the left and right directions. A moving groove 96 connected to its inner cavity is opened in the middle of the front side of the sleeve 95 along the up and down directions. Slide grooves 97 are opened on the left and right sides of the outer wall of the sleeve 95 along the up and down directions. The outer wall of the sleeve 95 is provided with The scale line 910, the sleeve 95 is used to limit the telescopic rod 911, the upper and lower ends of the second guide rod 98 are respectively arranged on the upper and lower sides of the inner cavity of the moving groove 96, the number of the third guide rods 99 is several, and the several third guide rods 99 are divided into a group of two, and the upper and lower ends of the two third guide rods 99 in each group are respectively arranged on the upper and lower sides of the inner cavity of the slide groove 97, the telescopic rod 911 can be slidably adapted and inserted into the inner cavity of the sleeve 95, and the bottom end of the telescopic rod 911 can be slidably extended out of the bottom end of the moving plate 94, the roller 912 is arranged at the bottom end of the telescopic rod 911, the spring 913 is sleeved on the bottom end of the outer wall of the telescopic rod 911, the bottom end of the spring 913 is clamped on the top of the roller 912, and the top of the spring 913 is clamped on the bottom end of the moving plate 94, and the spring 9 13 is a rotary spring, which undergoes elastic deformation after being squeezed or stretched by external force, and returns to its initial state after the external force is removed. The spring 913 is used to push the roller 912 downward. The push plate 914 is arranged on the front side of the outer wall of the telescopic rod 911. The front side of the push plate 914 can slide and extend out of the inner cavity of the movable groove 96. The push plate 914 can be slidably sleeved on the outer wall of the second guide rod 98. The push plate 914 is used to indicate the thickness of the wooden door and push the first indicator piece 915 and the second indicator piece 917 to move. The first indicator piece 915 can be slidably adapted and inserted into the bottom end of the inner cavity of the slide groove 97. The first indicator piece 915 can be slidably sleeved on the outer wall of the third guide rod 99. The first indicator piece 915 is located below the push plate 914 and contacts with the push plate 914.The first indicator sheet 915 is used to mark the thickness value of the thinnest part of the wooden door, the second indicator sheet 917 can be slidably adapted to be inserted into the bottom end of the inner cavity of the slide groove 97, the second indicator sheet 917 can be slidably sleeved on the outer wall of the third guide rod 99, the second indicator sheet 917 is located above the push plate 914 and contacts the push plate 914, the second indicator sheet 917 is used to mark the thickness value of the thickest part of the wooden door, the number of spring clips 919 is several, and the several spring clips 919 are respectively arranged in the inner cavities of the several first indicator sheets 915 and the second indicator sheets 917, and the spring clips 919 are clamped on the outer wall of the third guide rod 99 The spring clip 919 is used to increase the friction between the first indicator sheet 915 and the second indicator sheet 917 and the third guide rod 99 to prevent the first indicator sheet 915 and the second indicator sheet 917 from sliding off or moving due to inertia. The iron block 916 is set at the top of the first indicator sheet 915, and the electromagnet 918 is set at the bottom of the second indicator sheet 917. The positions of the electromagnet 918 and the iron block 916 correspond and contact each other. The electromagnet 918 is a prior art and will not be described in detail here. The electromagnet 918 is used here to cooperate with the iron block 916 to connect the first indicator sheet 915 and the second indicator sheet 917 together.

[0033] The working principle includes the following steps:

[0034] Step 1: When in use, start the electromagnet 918, use the magnetic force of the electromagnet 918 to attract the iron block 916, prompt the first indicator piece 915 to connect with the second indicator piece 917, place the wooden door to be tested on the top of the base 1, and push it toward the roller 912. Under the pressure of the wooden door, the roller 912 pushes the telescopic rod 911 to move upward, and squeezes the spring 913 to elastically deform. While the telescopic rod 911 moves upward, the push plate 914 pushes the second indicator piece 917 to drive the first indicator piece 915 to move upward until When the roller 912 is completely moved to the top of the wooden door, and the bottom of the outer wall of the roller 912 contacts the top of the wooden door, the position of the scale line 910 indicated by the center point of the push plate 914 is the thickness of the wooden door at the roller 912, and the electromagnet 918 is turned off, so that the electromagnet 918 loses its magnetism, and the first indicator sheet 915 and the second indicator sheet 917 are disconnected. Under the clamping action of the spring clip 919 on the third guide rod 99, the first indicator sheet 915 and the second indicator sheet 917 can be prevented from sliding downward under the factor of gravity.

[0035] Step 2: Start the infrared distance sensor 3, rotate the screw 5, and use the rotational force generated by the rotation of the screw 5 to move the clamping plate 6 downward until the bottom end of the clamping plate 6 contacts the top of the wooden door, and then use the clamping plate 6 to clamp and fix the wooden door. At this time, the infrared distance sensor 3 and the receiver 7 can measure the thickness of the wooden door at this point by using the cooperation between them.

[0036] Step 3, start the motor 81, use the output end of the motor 81 to drive the sprocket 83 to rotate through the connecting rod 82, the rotation of the sprocket 83 prompts the chain 84 to drive the sliding column 85 to perform circumferential motion, the circumferential motion of the sliding column 85 cooperates with the driving groove 93 to prompt the driving plate 92 to drive the moving plate 94 to perform back and forth reciprocating motion, and then use the moving plate 94 to drive the roller 912 to move back and forth through the telescopic rod 911. When the roller 912 moves to a position where the thickness is thin, the elastic force of the spring 913 pushes the telescopic rod 911 to drive the roller 91 2 moves downward, and then the push plate 914 is used to push the first indicator piece 915 to move downward. At the same time, when the roller 912 moves to the position with greater thickness, the roller 912 is used to push the telescopic rod 911 to move upward, and then the push plate 914 is used to push the second indicator piece 917 to move upward. When the roller 912 moves to the rear side of the wooden door, the motor 81 is turned off, and the thickness difference of the wooden door can be read by reading the positions of the first indicator piece 915 and the second indicator piece 917 on the scale line 910, and the thickness of the thickest position and the thinnest position of the wooden door can be read.

[0037] In summary, this device realizes comprehensive, continuous and high-precision detection of the overall thickness of wooden doors. It can not only effectively cover the entire surface of the wooden doors, but also record the thickness data of each point, and then read the thickness deviation. It not only significantly improves the quality control level in the production process of wooden doors, ensuring the overall consistency and stability of the products from raw materials to finished products, but also greatly reduces the defective rate caused by uneven thickness, and improves production efficiency and finished product quality.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thickness detection device for wooden door production, characterized in that: include: Base (1); First guide rods (2), the number of the first guide rods (2) being four, and the front and rear ends of the four first guide rods (2) being respectively arranged on the front and rear sides, the left and right ends, and the upper and lower sides of the base (1); Infrared distance measuring sensors (3), the number of the infrared distance measuring sensors (3) being four, and the four infrared distance measuring sensors (3) being respectively arranged at the four corners of the top end of the base (1); Limit rods (4), the number of the limit rods (4) is twelve, and the twelve limit rods (4) are grouped into four groups of three each, and the four groups of limit rods (4) are respectively arranged at the four corners of the top end of the base (1); Screw rods (5), the number of the screw rods (5) being four, and the bottom ends of the four screw rods (5) are rotatably arranged at the four corners of the top end of the base (1) via bearings; Clamps (6), the number of the clamps (6) is four, the four clamps (6) are respectively slidably sleeved on the top ends of the outer walls of the four groups of limit rods (4), and the clamps (6) are screwed to the outer wall of the screw rod (5); A receiver (7), wherein the receiver (7) is arranged on the outer side of the bottom end of the clamping plate (6), and the positions of the four receivers (7) respectively correspond to the positions of the four infrared distance measuring sensors (3) and match each other; A moving mechanism (8), wherein the number of the moving mechanisms (8) is two, and the two moving mechanisms (8) are respectively arranged on the left and right sides of the base (1); A detection mechanism (9), wherein the detection mechanism (9) is arranged at the top of the base (1); The moving mechanism (8) comprises: A motor (81), wherein the number of the motors (81) is two, and the two motors (81) are respectively screw-connected to the front ends of the left and right sides of the base (1); Connecting rods (82), the number of the connecting rods (82) being four, one end of two of the connecting rods (82) being rotatably arranged at the left and right rear ends of the base (1) via bearings, and one end of the other two connecting rods (82) being respectively locked at the output ends of the two motors (81) via couplings; A sprocket (83), wherein the sprocket (83) is sleeved on the outer wall of the connecting rod (82) and is locked by a top screw; Chains (84), the number of the chains (84) being two, and the two ends of the two chains (84) being respectively sleeved on the outer walls of the four sprocket wheels (83); A slide post (85), wherein the slide post (85) is arranged at the inner front end of the chain (84); The detection mechanism (9) comprises: Slide blocks (91), the number of the slide blocks (91) being four, and the four slide blocks (91) being slidably sleeved on the front sides of the outer walls of the four first guide rods (2); A driving plate (92), wherein the number of the driving plates (92) is two, and the upper and lower ends of the two driving plates (92) are respectively arranged on the inner sides of the four sliding blocks (91), and a driving groove (93) penetrating left and right is opened on the left side of the driving plate (92) in the up-down direction, and the sliding column (85) can be slidably adapted and inserted in the middle of the inner cavity of the driving groove (93); A movable plate (94), wherein the left and right sides of the movable plate (94) are respectively arranged at the middle of the outer walls of the two driving plates (92); A sleeve (95), wherein the number of the sleeves (95) is plural, and the sleeves (95) are equidistantly arranged at the top of the movable plate (94) along the left-right direction, a movable groove (96) communicating with the inner cavity thereof is provided in the middle of the front side of the sleeve (95) along the up-down direction, and sliding grooves (97) are provided on the left and right sides of the outer wall of the sleeve (95) along the up-down direction, and a scale mark (910) is provided on the outer wall of the sleeve (95); A second guide rod (98), wherein upper and lower ends of the second guide rod (98) are respectively arranged at upper and lower sides of the inner cavity of the movable groove (96); A third guide rod (99), wherein the number of the third guide rods (99) is a plurality, and each two of the third guide rods (99) are grouped together, and the upper and lower ends of the two third guide rods (99) in each group are respectively arranged on the upper and lower sides of the inner cavity of the slide groove (97); A telescopic rod (911), the telescopic rod (911) being slidably adapted to be inserted into the inner cavity of the sleeve (95), and the bottom end of the telescopic rod (911) being slidably extended out of the bottom end of the movable plate (94); A roller (912), wherein the roller (912) is arranged at the bottom end of the telescopic rod (911); A spring (913), wherein the spring (913) is sleeved on the bottom end of the outer wall of the telescopic rod (911), the bottom end of the spring (913) is clamped on the top end of the roller (912), and the top end of the spring (913) is clamped on the bottom end of the movable plate (94); A push plate (914), the push plate (914) being arranged on the front side of the outer wall of the telescopic rod (911), the front side of the push plate (914) being slidably extended out of the inner cavity of the movable groove (96), and the push plate (914) being slidably sleeved on the outer wall of the second guide rod (98); a first indicator sheet (915), the first indicator sheet (915) being slidably adapted to be inserted into the bottom end of the inner cavity of the slide groove (97), the first indicator sheet (915) being slidably sleeved on the outer wall of the third guide rod (99), the first indicator sheet (915) being located below the push plate (914) and in contact with the push plate (914); a second indicator sheet (917), the second indicator sheet (917) being slidably adapted to be inserted into the bottom end of the inner cavity of the slide groove (97), the second indicator sheet (917) being slidably sleeved on the outer wall of the third guide rod (99), the second indicator sheet (917) being located above the push plate (914) and in contact with the push plate (914); A spring clip (919), wherein the number of the spring clips (919) is plural, and the spring clips (919) are respectively arranged in the inner cavities of the first indicator sheets (915) and the second indicator sheets (917), and the spring clips (919) are clamped on the outer wall of the third guide rod (99).

2. A thickness detection device for wooden door production according to claim 1, characterized in that: The detection mechanism (9) further comprises: an iron block (916), wherein the iron block (916) is arranged on the top of the first indicator sheet (915); An electromagnet (918) is disposed at the bottom end of the second indicator sheet (917), and the electromagnet (918) and the iron block (916) are located in corresponding positions and in contact with each other.

3. A thickness detection device for wooden door production according to claim 2, characterized in that: The vertical height of the inner cavity of the driving groove (93) is greater than the vertical height of the chain (84).

4. A method for detecting thickness of wooden doors for production, which is applied to a device for detecting thickness of wooden doors for production according to claim 3, specifically comprising the following steps: Step 1: When in use, the electromagnet (918) is started, and the magnetic force of the electromagnet (918) is used to attract the iron block (916), so that the first indicator piece (915) and the second indicator piece (917) are connected, and the wooden door to be tested is placed on the top of the base (1) and pushed toward the roller (912). Under the pressure of the wooden door, the roller (912) pushes the telescopic rod (911) to move upward and squeezes the spring (913) to cause elastic deformation. While the telescopic rod (911) moves upward, the push plate (914) is used to push the second indicator piece (917) to drive the first indicator piece (915) to move upward. Until the roller (912) is completely moved to the top of the wooden door and the bottom end of the outer wall of the roller (912) contacts the top end of the wooden door, at which time the position of the scale line (910) indicated by the center point of the push plate (914) is the thickness of the wooden door at the roller (912), the electromagnet (918) is turned off, so that the electromagnet (918) loses its magnetism, the first indicator sheet (915) and the second indicator sheet (917) are disconnected, and the spring clip (919) clamps the third guide rod (99), thereby preventing the first indicator sheet (915) and the second indicator sheet (917) from sliding downward under the factor of gravity; Step 2: Start the infrared distance sensor (3), rotate the screw (5), and use the rotational force generated by the rotation of the screw (5) to move the clamping plate (6) downward until the bottom end of the clamping plate (6) contacts the top of the wooden door, and then use the clamping plate (6) to clamp and fix the wooden door. At this time, the infrared distance sensor (3) and the receiver (7) can measure the thickness of the wooden door at this point by using the cooperation between them; Step 3, start the motor (81), use the output end of the motor (81) to drive the sprocket (83) to rotate through the connecting rod (82), the rotation of the sprocket (83) prompts the chain (84) to drive the sliding column (85) to perform circumferential movement, the circumferential movement of the sliding column (85) cooperates with the driving groove (93) to prompt the driving plate (92) to drive the moving plate (94) to perform back and forth reciprocating movement, and then use the moving plate (94) to drive the roller (912) to move forward and backward through the telescopic rod (911), when the roller (912) moves to a position where the thickness is thin, the elastic force of the spring (913) pushes the telescopic rod (911) to drive The roller (912) moves downward, and then the push plate (914) pushes the first indicator piece (915) to move downward. At the same time, when the roller (912) moves to a position with greater thickness, the roller (912) pushes the telescopic rod (911) to move upward, and then the push plate (914) pushes the second indicator piece (917) to move upward. When the roller (912) moves to the rear side of the wooden door, the motor (81) is turned off, and the thickness difference of the wooden door can be read by reading the positions of the first indicator piece (915) and the second indicator piece (917) on the scale line (910), and the thickness of the wooden door at the thickest position and the thinnest position can be read.

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