Equipment for rapidly measuring size of injection-molded tableware product based on laser measurement

Abstract

The invention relates to the technical field of laser detection, and discloses an injection molding tableware product size rapid measurement device based on laser measurement, which comprises a conveying table and a laser measurement system mounted on the conveying table, and is characterized in that a lifting positioning mechanism is mounted at the bottom end of a lifting rod and comprises an adsorption assembly and an orientation assembly; a driving disc is rotationally connected to the outer wall of the lifting rod, a transmission piece is arranged on the conveying table, when the driving disc makes contact with the transmission piece, the T-shaped rod drives the piston to ascend, and meanwhile the L-shaped rod drives the positioning piece to move towards one side of the lifting rod. The adsorption assembly and the orientation assembly cooperate with each other to accurately adjust the position of the dinner plate, so that hard friction between the dinner plate and the guide structure is avoided, scratching and abrasion are effectively prevented, the product percent of pass is improved, the adjusting process can adapt to dinner plates of different sizes, the problem of blockage is solved, the dinner plate can smoothly enter a scanning area, and the conveying and measuring efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of laser inspection technology, and in particular to a rapid measurement device for the dimensions of injection-molded tableware products based on laser measurement. Background Technology

[0002] Injection-molded tableware, thanks to its injection molding process, can be mass-produced at a lower cost. Compared to tableware made of traditional materials, it is not only more affordable but also boasts excellent heat resistance, water resistance, chemical corrosion resistance, and impact resistance, making it widely used in the catering industry. However, during the injection molding process, factors such as material shrinkage, mold wear, and temperature fluctuations can easily lead to dimensional deviations in the tableware, affecting product quality. To address this issue, a laser scanning system has been introduced into the tableware size inspection process. The laser scanning device is integrated into the conveyor belt. As the injection-molded plates move along the conveyor belt and pass through the scanning area, the laser line scans the plate surface, acquiring cross-sectional contour data. Based on this data, the system can quickly and accurately measure the roundness and dimensions of the plates, providing data support for quality control. To ensure that the plates accurately enter the scanning area, guide grooves are installed on both sides of the conveyor belt to forcibly limit the movement of the plates. However, these guide grooves have the following problems: Firstly, the edge of the plate slides into contact with the side wall of the guide groove, easily causing scratches and wear at the rounded edge of the plate, reducing the product qualification rate; secondly, the guide groove cannot adapt to plates of different sizes, and larger plates often get stuck, which not only reduces the efficiency of conveying and measurement but may also interrupt the inspection process. Summary of the Invention

[0003] Given the problems of wear and tear on plates during the guiding process and reduced measurement efficiency in existing technologies, a laser-based rapid measurement device for the dimensions of injection-molded tableware products is proposed.

[0004] The purpose is to: lift up the tray on the conveyor belt, clamp the tray with a positioning mechanism, release the suction, and then automatically adjust the positioning of the tray before putting it back on the conveyor belt, so that the tray accurately enters the scanning area.

[0005] The technical solution of the present invention is a rapid measurement device for the dimensions of injection-molded tableware products based on laser measurement, including a conveyor table and a laser measurement system installed on the conveyor table. A conveying platform is installed on the input end of the conveyor table. The conveyor table includes two fixed seats. Chains are rotatably connected to opposite sides of the two fixed seats. A crossbar is connected between the two chains. A lifting rod is vertically slidably connected to the middle of the crossbar. A guide rod is connected to the top of the lifting rod. A guide plate is fixedly connected to the side wall of the fixed seat. The end of the guide rod cooperates with the corresponding guide plate to drive the lifting rod to rise and fall. A lifting and positioning mechanism is installed at the bottom of the lifting rod. The lifting and positioning mechanism includes an adsorption component and a directional component. The adsorption assembly includes a fixed cylinder fixedly connected to the bottom of the lifting rod, a piston slidably connected inside the fixed cylinder, and a T-shaped rod fixedly connected to the top of the piston; The orientation component includes multiple fixed rods arranged in a ring at equal intervals. One end of each fixed rod is connected and fixed to the outer wall of the lifting rod. An L-shaped rod is slidably connected inside the fixed rod, and a positioning element is fixedly connected to the lower end of the L-shaped rod. A drive disc is rotatably connected to the outer wall of the lifting rod, and a transmission component is provided on the conveying platform. When the drive disc contacts the transmission component, the T-shaped rod drives the piston to rise, and at the same time, the L-shaped rod drives the positioning component to move to one side of the lifting rod.

[0006] Furthermore, the two fixed seats are symmetrically arranged and fixedly connected to the conveyor platform. A motor is installed on the side of the fixed seat away from the chain, and the output shaft of the motor is connected to the chain drive.

[0007] Furthermore, the guide plate has a lifting guide groove on the side facing the guide rod, and the lifting guide groove is composed of three trapezoidal grooves arranged alternately; The end of the guide rod is provided with a guide wheel, which makes rolling contact with the lifting guide groove.

[0008] Furthermore, the drive disc includes a gear disc rotatably connected to the outer wall of the lifting rod, and the transmission component includes a support plate fixedly connected to one of the fixed seats. Three racks are fixedly connected to the side of the support plate facing the gear disc, and the three racks are arranged in a triangular pattern. The top surface of the gear disk is fixedly connected with multiple trapezoidal blocks at equal intervals in a ring. The top of the T-shaped rod is vertically slidably engaged with the lifting rod, and both ends of the top of the T-shaped rod extend to the outside of the lifting rod and are rotatably connected to guide wheels.

[0009] Furthermore, an elastic element is connected between the top of the piston and the inner wall of the lifting rod.

[0010] Furthermore, the drive disk also includes a plurality of limiting rods arranged in a ring at equal intervals, the limiting rods being fixedly connected to the bottom surface of the gear disk; One end of the L-shaped rod and the fixed rod are connected by an elastic element two. A guide wheel three is provided above the fixed rod. The connecting shaft of the guide wheel three is engaged with the top of the fixed rod horizontally. One end of the L-shaped rod of the connecting shaft of the guide wheel three is fixedly connected.

[0011] Furthermore, the limiting rod is composed of an arc-shaped part and an inclined part, and the guide wheel three makes frictional contact with the outer arc surface of the arc-shaped part of the limiting rod.

[0012] Furthermore, the positioning component includes a rectangular frame fixedly connected to the lower end of the L-shaped rod, a top rod slidably connected inside the rectangular frame, a top plate hinged to one end of the top rod facing the lifting rod, and an elastic element three connected together between the other end of the top rod and the rectangular frame.

[0013] Furthermore, a positioning rod with a bent structure is hinged to the top of the rectangular frame, and an adjusting rod is fixedly connected to the side wall of the top rod, with one side of the positioning rod in sliding contact with the adjusting rod.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. After the tray on the conveyor belt is lifted by the adsorption component, the positioning component abuts against the tray. After the adsorption component releases the tray, the positioning component and the orientation component work together to adjust the orientation of the tray, which then returns to the conveyor belt. The adsorption component and the orientation component work together to precisely adjust the orientation of the tray, avoiding hard friction between the tray and the guide structure, effectively preventing scratches and wear, and improving the product qualification rate. Secondly, this adjustment process can adapt to trays of different sizes, solve the jamming problem, and ensure that the tray enters the scanning area smoothly, greatly improving the efficiency of conveying and measurement.

[0015] 2. When the top plate abuts against the plate, the positioning rod slides in contact with the adjusting rod, allowing the angle to be flexibly adjusted according to the size and shape of the plate. This forms a stable clamping structure with the top plate. The two work together to ensure that the plate remains stable during orientation adjustment, preventing the plate from shaking or shifting. This allows the plate to be placed back onto the conveyor belt in a precise posture and enter the scanning area, thereby further improving the accuracy and reliability of plate size measurement.

[0016] 3. The bending structure of the positioning rod allows it to rotate freely within a certain range. When faced with plates of different sizes and shapes, the positioning rod can quickly adjust its posture and actively conform to the edge contour of the plate. This adaptive characteristic allows the positioning rod to effectively adapt to the diversity of plates without the need for complicated adjustment devices. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the conveyor platform and lifting and positioning mechanism of the present invention; Figure 3 This is a schematic diagram of the conveyor platform structure of the present invention; Figure 4 This is a schematic diagram of the guide rod and guide plate structure of the present invention; Figure 5 This is a schematic cross-sectional view of the lifting rod, adsorption assembly, and orientation assembly of the present invention; Figure 6 This is a vertically disassembled schematic diagram of the drive disk structure of the present invention; Figure 7 This is a schematic plan view of the gear disk and transmission component structure of the present invention; Figure 8 This is a top view of the limiting rod and L-shaped rod structure of the present invention; Figure 9 This is a schematic diagram of the three structures of the limiting rod and guide wheel of the present invention; Figure 10 This is a schematic cross-sectional view of the positioning component structure of the present invention; Figure 11 This is a schematic diagram of the top rod and positioning rod structure of the present invention.

[0018] In the picture: 1. Conveyor table; 2. Laser measurement system; 3. Conveyor table; 31. Fixed base; 32. Chain; 33. Crossbar; 4. Lifting rod; 5. Guide rod; 6. Guide plate; 7. Lifting guide groove; 8. Adsorption assembly; 81. Fixed cylinder; 82. Piston; 83. T-shaped rod; 9. Orientation assembly; 91. Fixed rod; 92. L-shaped rod; 10. Positioning component; 101. Rectangular frame; 102. Top rod; 103. Top plate; 104. Positioning rod; 105. Adjusting rod; 11. Drive disc; 111. Gear disc; 112. Trapezoidal block; 113. Limiting rod; 12. Transmission component; 121. Support plate; 122. Rack. Detailed Implementation

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] Example 1, referring to Figures 1-5This invention provides a laser-based rapid measurement device for the dimensions of injection-molded tableware products, comprising a conveyor table 1 and a laser measurement system 2 mounted on the conveyor table 1. A conveyor platform 3 is mounted on the input end of the conveyor table 1. The conveyor platform 3 includes two fixed seats 31, each with a chain 32 rotatably connected to one side of its opposite side. A crossbar 33 is connected between the two chains 32. A lifting rod 4 is vertically slidably connected to the middle of the crossbar 33. A guide rod 5 is connected to the top of the lifting rod 4. A guide plate 6 is fixedly connected to the side wall of the fixed seat 31. The end of the guide rod 5 cooperates with the corresponding guide plate 6 to drive the lifting rod 4 to rise and fall. A lifting and positioning mechanism is mounted at the bottom of the lifting rod 4. The system includes an adsorption component 8 and a directional component 9. The adsorption component 8 includes a fixed cylinder 81 fixedly connected to the bottom of the lifting rod 4, a piston 82 slidably connected inside the fixed cylinder 81, and a T-shaped rod 83 fixedly connected to the top of the piston 82. The directional component 9 includes a plurality of fixed rods 91 arranged in a ring at equal intervals. One end of the fixed rod 91 is connected and fixed to the outer wall of the lifting rod 4. An L-shaped rod 92 is slidably connected inside the fixed rod 91, and a positioning element 10 is fixedly connected to the lower end of the L-shaped rod 92. A drive disk 11 is rotatably connected to the outer wall of the lifting rod 4, and a transmission element 12 is provided on the conveying table 3. When the drive disk 11 contacts the transmission element 12, the T-shaped rod 83 drives the piston 82 to rise, and at the same time, the L-shaped rod 92 drives the positioning element 10 to move to one side of the lifting rod 4.

[0021] Specifically, the two chains 32 rotate synchronously, driving the crossbar 33 to rotate cyclically, and keeping the lifting rod 4 and the plate on the conveyor belt at the same speed. The guide rod 5 and the guide plate 6 cooperate to drive the lifting rod 4 to rise and fall. When the lifting rod 4 falls, it causes the bottom surface of the fixed cylinder 81 to abut against the plate. The T-shaped rod 83 rises, and the piston 82 creates a negative pressure at the bottom of the fixed cylinder 81 to attract the plate. Then the lifting rod 4 rises, and the L-shaped rod 92 moves to one side of the lifting rod 4, so that the positioning part 10 abuts against the edge of the plate. Then the fixed cylinder 81 releases its attraction to the plate, and the L-shaped rod 92 continues to move, so that the center of the plate coincides with the axis of the lifting rod 4. Finally, the lifting rod 4 falls, causing the plate to fall onto the conveyor belt. The L-shaped rod 92 moves in the opposite direction, so that the positioning part 10 releases its limit on the plate. The plate continues to move with the conveyor belt and can accurately enter the scanning area of ​​the laser measurement system 2. The conveyor 3 works in conjunction with the lifting and positioning mechanism to achieve automatic conveying and precise positioning of tableware. The chain 32 drives the crossbar 33 to move, so that the lifting rod 4 moves at the same speed as the plate. The guide structure controls the lifting and lowering, the adsorption component 8 can stably grab the plate, and the orientation component 9 can accurately adjust the position of the plate to ensure that its center coincides with the axis of the lifting rod 4. This not only avoids damage to the plate during guidance, but also greatly improves the measurement efficiency and ensures that the tableware can accurately enter the scanning area of ​​the laser measurement system 2.

[0022] It is understandable that the axis of the lifting rod 4 is located on the center line of the scanning area of ​​the laser measurement system 2. When the positioned plate moves into the scanning area with the conveyor belt, the center of the plate coincides with the center of the scanning area.

[0023] Reference Figure 1 and Figure 3 Two fixed seats 31 are symmetrically arranged and fixedly connected to the conveyor table 1. A motor is installed on the side of the fixed seat 31 away from the chain 32, and the output shaft of the motor is connected to the chain 32 for transmission.

[0024] Specifically, the two motors start and stop synchronously, driving the two chains 32 to rotate synchronously. The lower part of the chains 32 moves in the same direction as the conveyor belt, so that the crossbar 33 drives the lifting rod 4 to maintain the same speed as the plate.

[0025] Each chain 32 has two sprockets meshing with it. The two sprockets are horizontally arranged and rotatably connected to the corresponding fixed base 31. The motor output shaft is coaxially connected to one of the sprockets in the adjacent chain 32.

[0026] Reference Figures 2-4 The guide plate 6 has a lifting guide groove 7 on the side facing the guide rod 5. The lifting guide groove 7 is composed of three trapezoidal grooves arranged in an alternating manner. A guide wheel is provided at the end of the guide rod 5, and the guide wheel makes rolling contact with the lifting guide groove 7.

[0027] Specifically, when the crossbar 33 is located below the chain 32, the guide wheel 1 enters the lifting guide groove 7. The guide wheel 1 and the lifting guide groove 7 work together to drive the lifting rod 4 to move down-up-down-up. The lifting guide groove 7 and the guide wheel 1 work together to precisely control the regular lifting of the lifting rod 4 through a special trapezoidal groove interlacing structure, so as to achieve stable gripping and placement of the plate and ensure that the measurement process is orderly and efficient.

[0028] When the lifting rod 4 descends for the first time, the adsorption component 8 contacts and adsorbs the suction cup. When the lifting rod 4 rises for the first time, the adsorption component 8 drives the plate to rise and detach from the conveyor belt. Then, the orientation component 9 adjusts the position of the plate. When the lifting rod 4 descends again, the orientation component 9 drives the plate to fall onto the conveyor belt.

[0029] It is understandable that the end of the crossbar 33 is rotatably connected to the chain 32. When the crossbar 33 is located above the chain 32, the lifting rod 4 remains vertical to avoid increasing running vibration. Furthermore, there is a sliding resistance between the crossbar 33 and the lifting rod 4, preventing the lifting rod 4 from sliding against the crossbar 33.

[0030] Reference Figure 5 and Figure 6The drive disc 11 includes a gear disc 111 rotatably connected to the outer wall of the lifting rod 4. The transmission component 12 includes a support plate 121 fixedly connected to one of the fixed seats 31. Three racks 122 are fixedly connected to the side of the support plate 121 facing the gear disc 111. The three racks 122 are arranged in a triangular shape. Multiple trapezoidal blocks 112 are fixedly connected in an annular shape at equal intervals on the top surface of the gear disc 111. The top of the T-shaped rod 83 is vertically slidably engaged with the lifting rod 4, and both ends of the top of the T-shaped rod 83 extend to the outside of the lifting rod 4 and are rotatably connected to the guide wheel 2.

[0031] Specifically, each time the gear disk 111 meshes with a rack 122, it rotates by a certain angle. The inclined surface of the trapezoidal block 112 faces the rotation direction of the gear disk 111. When the trapezoidal block 112 rotates and lifts the guide wheel 2, it drives the T-shaped rod 83 to rise. The piston 82 rises on the inner wall of the fixed cylinder 81, creating a negative pressure at the bottom of the fixed cylinder 81, which can adsorb the plate it is in contact with. By precisely controlling the rotation angle through the meshing of the gear disk 111 and the rack 122, and by utilizing the cooperation between the trapezoidal block 112 and the guide wheel 2, the T-shaped rod 83 rises stably, driving the piston 82 to form a negative pressure in the fixed cylinder 81 to adsorb the plate. This ensures that the adsorption action is accurate and stable, effectively improving the reliability of the plate gripping and the accuracy of the pre-measurement positioning.

[0032] Reference Figure 5 and Figure 6 An elastic element is connected between the top of piston 82 and the inner wall of lifting rod 4.

[0033] Specifically, when the T-shaped rod 83 rises, it causes the elastic element 1 to stretch and store force. When the trapezoidal block 112 is not in contact with the guide wheel 2, the elastic element 1 contracts and causes the T-shaped rod 83 and piston 82 to descend.

[0034] Reference Figure 5 and Figure 6 The drive disk 11 also includes a plurality of limit rods 113 arranged in a ring at equal intervals. The limit rods 113 are fixedly connected to the bottom surface of the gear disk 111. One end of the L-shaped rod 92 is connected to the fixed rod 91 by an elastic element 2. A guide wheel 3 is provided above the fixed rod 91. The connecting shaft of the guide wheel 3 is engaged with the top of the fixed rod 91 at a horizontal position. One end of the connecting shaft of the guide wheel 3 is fixedly connected to the L-shaped rod 92.

[0035] Specifically, the limiting rod 113 rolls into contact with the guide wheel three, causing the L-shaped rod 92 to slide within the fixed rod 91. When the limiting rod 113 abuts against the guide wheel three, the L-shaped rod 92 slides away from the lifting rod 4, causing the elastic element two to stretch and store force. At the same time, all positioning elements 10 cooperate to form the maximum range of clamping cavity, facilitating automatic adaptation to various sizes of plates. When the limiting rod 113 is not in contact with the guide wheel three, the L-shaped rod 92 returns to its original position under the contraction of the elastic element two, causing all positioning elements 10 to cooperate to form the minimum range of clamping cavity. The linkage design of the limiting rod 113 and the guide wheel three, in conjunction with the elastic element two, enables the L-shaped rod 92 to slide flexibly, allowing the positioning elements 10 to form a variable clamping cavity, thus automatically adapting to various sizes of plates. The clamping range is controlled by the contact and disengagement of the limiting rod 113, which facilitates plate placement and precise positioning, effectively improving the equipment's versatility and measurement adaptability to different specifications of tableware.

[0036] It is understandable that the directional component 9 is located above the adsorption component 8 and below the drive disk 11. The number of limiting rods 113 is the same as the number of guide wheels 3. The top of the fixing rod 91 is provided with a through hole for the horizontal displacement of the guide wheel 3 shaft. The length of the through hole is less than the stretching length of the elastic element 2. When the guide wheel 3 abuts against the side of the through hole near the lifting rod 4, the elastic element 2 is still in a stretched state.

[0037] It should be noted that all elastic elements 2 have the same elastic length, size, and elastic coefficient. When the fixing cylinder 81 does not adhere to the plate and the positioning element 10 is still in contact with the plate, all elastic elements 2 return to the same elastic force, thereby moving the plate to the center position.

[0038] Reference Figure 6 and Figure 8 The limiting rod 113 is composed of an arc-shaped part and an inclined part, and the guide wheel three makes frictional contact with the outer arc surface of the arc-shaped part of the limiting rod 113.

[0039] Specifically, the center of the arc-shaped part coincides with the center of the gear disk 111, and the inclined part is set at an acute angle to the diameter line of the gear disk 111. When the inclined part contacts the guide wheel three, it drives the L-shaped rod 92 to slide away from the lifting rod 4, making the clamping cavity larger. When the arc-shaped part contacts the guide wheel three, the L-shaped rod 92 remains stationary, and the clamping cavity is at its maximum state. The arc-shaped part and the inclined part of the limiting rod 113 cooperate with the guide wheel three. The inclined part expands the clamping cavity, and the arc-shaped part maintains its maximum state, which can flexibly adapt to different sized plates and improve the practicality of the equipment.

[0040] The outer arc surface of the arc plate has grooves at both ends that are adapted to the guide wheel three. When the guide wheel three is located in any groove, the gear disk 111 can limit the orientation component 9 to keep it stable.

[0041] It should be noted that, referring to Figures 2-8When the guide rod 5 moves from the right side of the lifting guide groove 7 to the left, the gear disk 111 meshes with the right rack 122, the trapezoidal block 112 drives the T-shaped rod 83 to rise, the fixed cylinder 81 generates negative pressure, and at the same time the guide wheel 3 moves from the middle of the limiting rod 113 to the end away from the inclined part, but still in contact with the arc-shaped part; when the guide rod 5 moves from the middle of the lifting guide groove 7 to the left, the gear disk 111 meshes with the middle rack 122, the guide wheel 3 cancels contact with the limiting rod 113, and the L-shaped rod 92 The positioning component 10 abuts against the edge of the plate, while the trapezoidal block 112 cancels its contact with the guide wheel 2. The T-shaped rod 83 descends, and the negative pressure of the fixed cylinder 81 is released. At this time, the elastic component 2 moves the plate to the center position. When the guide rod 5 moves to the left side of the lifting guide groove 7, the gear disk 111 meshes with the left rack 122, the trapezoidal block 112 does not contact the guide wheel 2, the inclined part of the limit rod 113 contacts the guide wheel 3, and the L-shaped rod 92 drives the positioning component 10 to cancel its contact with the plate.

[0042] Example 2, refer to Figure 10 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the positioning member 10 includes a rectangular frame 101 fixedly connected to the lower end of the L-shaped rod 92. A top rod 102 is slidably connected inside the rectangular frame 101. A top plate 103 is hinged to one end of the top rod 102 facing the lifting rod 4. An elastic member 3 is connected between the other end of the top rod 102 and the rectangular frame 101.

[0043] Specifically, when the L-shaped rod 92 moves the positioning component 10 towards the lifting rod 4, the top plate 103 can rotate to abut against the outer wall of the plate. Under the action of the elastic component 3, a buffer displacement space is provided when the top plate 103 contacts the plate, avoiding impact to the plate. After all the top plates 103 abut against the plate, the plate can be clamped and limited. The top plate 103 can rotate to fit against the side wall of the plate, and with the elastic component 3 providing buffer displacement, it effectively avoids impact damage to the plate. During precise positioning, it can not only firmly clamp the plate, but also rely on elastic buffering to ensure that injection-molded tableware of different textures and shapes are not damaged during the measurement and positioning process, thus improving the applicability and protection of the equipment.

[0044] Among them, the top plate 103 is fixed with an anti-slip pad layer on the side facing the lifting rod 4, which can improve the contact stability between the top plate 103 and the plate.

[0045] It should be noted that in this technical solution, elastic element one, elastic element two, and elastic element three are all springs. The remaining structures are the same as those in Embodiment 1.

[0046] Example 3, referring to Figure 10 and Figure 11This is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that: a positioning rod 104 with a bent structure is hinged to the top of the rectangular frame 101, and an adjusting rod 105 is fixedly connected to the side wall of the top rod 102. One side of the positioning rod 104 is in sliding contact with the adjusting rod 105.

[0047] Specifically, when the top plate 103 abuts against the plate, the rectangular frame 101 continues to move, and the top rod 102 moves to one side of the rectangular frame 101, causing the adjusting rod 105 to rotate counterclockwise. The upper part of the adjusting rod 105 can abut against the upper end of the plate, thus preventing the plate from sliding upward due to the upward force exerted by the top plate 103 on the plate. Through the linkage between the positioning rod 104 and the adjusting rod 105, after the top plate 103 abuts against the plate, the continuous movement of the rectangular frame 101 causes the adjusting rod 105 to rotate, making its upper part abut against the upper end of the plate. This design effectively counteracts the upward force of the top plate 103 on the plate, prevents the plate from sliding, enhances positioning stability, ensures accurate positioning during tableware size measurement, and improves the reliability of measurement results.

[0048] The upper part of the adjusting rod 105 is fixed with a buffer pad on the side facing downwards to prevent wear when it comes into contact with the plate.

[0049] Understandably, the adjustment rod 105 has a bent design, allowing the upper end to adaptively adjust according to the height of the plate, thus improving its adaptability to plates of different sizes. The rest of the structure is the same as in Embodiment 2.

[0050] Based on embodiments 1-3, the working principle of this invention is as follows: The plate to be measured is placed at the input end of the conveyor belt. The plate moves forward with the conveyor belt and enters the area of ​​the conveyor table 3. At this time, the lifting guide groove 7 and the first guide wheel cooperate to precisely guide the lifting rod 4 down until the bottom surface of the fixed cylinder 81 is in close contact with the top surface of the plate. At the same time, the gear disk 111 starts to rotate, and the trapezoidal block 112 on it contacts the second guide wheel, pushing the T-shaped rod 83 up, causing the piston 82 to move upward in the fixed cylinder 81, forming a negative pressure, and firmly adhering to the plate. Then, the lifting guide groove 7 and the first guide wheel cooperate again to drive the lifting rod 4 up. The gear disk 111 rotates to make the limiting rod 113 disengage from the third guide wheel. Under the action of the second elastic element, the L-shaped rod 92 drives the top plate 103 to smoothly fit against the outer wall of the plate. Subsequently, trapezoidal block 112 separates from guide wheel 2, piston 82 descends, fixed cylinder 81 releases its grip on the plate, and the three elastic components work together to ensure the plate is precisely centered on lifting rod 4; finally, lifting guide groove 7 and guide wheel 1 cooperate for the third time to drive lifting rod 4 to descend, the plate falls smoothly onto the conveyor belt, gear disk 111 rotates, limit rod 113 pushes L-shaped rod 92 to move, top plate 103 detaches from the plate, and the plate then follows the conveyor belt forward, smoothly and accurately entering the scanning area of ​​laser measurement system 2, completing the entire positioning and conveying process.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A laser-based rapid measurement device for the dimensions of injection-molded tableware products, comprising a conveyor table and a laser measurement system mounted on the conveyor table, characterized in that: A conveyor platform is installed on the input end of the conveyor platform. The conveyor platform includes two fixed seats. Chains are rotatably connected to the opposite sides of the two fixed seats. A crossbar is connected between the two chains. A lifting rod is vertically slidably connected to the middle of the crossbar. A guide rod is connected to the top of the lifting rod. A guide plate is fixedly connected to the side wall of the fixed seat. The end of the guide rod cooperates with the corresponding guide plate to drive the lifting rod to rise and fall. A lifting and positioning mechanism is installed at the bottom of the lifting rod. The lifting and positioning mechanism includes an adsorption component and a directional component. The adsorption assembly includes a fixed cylinder fixedly connected to the bottom of the lifting rod, a piston slidably connected inside the fixed cylinder, and a T-shaped rod fixedly connected to the top of the piston; The orientation component includes multiple fixed rods arranged in a ring at equal intervals. One end of each fixed rod is connected and fixed to the outer wall of the lifting rod. An L-shaped rod is slidably connected inside the fixed rod, and a positioning element is fixedly connected to the lower end of the L-shaped rod. A drive disc is rotatably connected to the outer wall of the lifting rod, and a transmission component is provided on the conveying platform. When the drive disc contacts the transmission component, the T-shaped rod drives the piston to rise, and at the same time, the L-shaped rod drives the positioning component to move to one side of the lifting rod.

2. The laser-based rapid measurement device for injection-molded tableware product dimensions according to claim 1, characterized in that: The two fixed seats are symmetrically arranged and fixedly connected to the conveyor platform. A motor is installed on the side of the fixed seat away from the chain, and the output shaft of the motor is connected to the chain drive.

3. The laser-based rapid measurement device for injection-molded tableware product dimensions according to claim 1, characterized in that: The guide plate has a lifting guide groove on the side facing the guide rod, and the lifting guide groove is composed of three trapezoidal grooves arranged in an alternating manner; The end of the guide rod is provided with a guide wheel, which makes rolling contact with the lifting guide groove.

4. The laser-based rapid measurement device for injection-molded tableware product dimensions according to claim 1, characterized in that: The drive disc includes a gear disc rotatably connected to the outer wall of the lifting rod, and the transmission component includes a support plate fixedly connected to one of the fixed seats. Three racks are fixedly connected to the side of the support plate facing the gear disc, and the three racks are arranged in a triangular pattern. The top surface of the gear disk is fixedly connected with multiple trapezoidal blocks at equal intervals in a ring. The top of the T-shaped rod is vertically slidably engaged with the lifting rod, and both ends of the top of the T-shaped rod extend to the outside of the lifting rod and are rotatably connected to guide wheels.

5. The laser-based rapid measurement device for injection-molded tableware product dimensions according to claim 1, characterized in that: An elastic element is connected between the top of the piston and the inner wall of the lifting rod.

6. The laser-based rapid measurement device for injection-molded tableware product dimensions according to claim 4, characterized in that: The drive disk also includes a plurality of limiting rods arranged in a ring at equal intervals, and the limiting rods are fixedly connected to the bottom surface of the gear disk; One end of the L-shaped rod and the fixed rod are connected by an elastic element two. A guide wheel three is provided above the fixed rod. The connecting shaft of the guide wheel three is engaged with the top of the fixed rod horizontally. One end of the L-shaped rod of the connecting shaft of the guide wheel three is fixedly connected.

7. The laser-based rapid measurement device for injection-molded tableware product dimensions according to claim 6, characterized in that: The limiting rod is composed of an arc-shaped part and an inclined part, and the guide wheel three makes frictional contact with the outer arc surface of the arc-shaped part of the limiting rod.

8. The laser-based rapid measurement device for injection-molded tableware product dimensions according to claim 1, characterized in that: The positioning component includes a rectangular frame fixedly connected to the lower end of the L-shaped rod, a top rod slidably connected inside the rectangular frame, a top plate hinged to one end of the top rod facing the lifting rod, and an elastic element three connected to the other end of the top rod and the rectangular frame.

9. The laser-based rapid measurement device for injection-molded tableware product dimensions according to claim 8, characterized in that: The top of the rectangular frame is hinged with a positioning rod with a bent structure, and an adjusting rod is fixedly connected to the side wall of the top rod. One side of the positioning rod is in sliding contact with the adjusting rod.

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