Tooth row positioning device and method

Abstract

The invention discloses a gripper bar positioning device, which belongs to the technical field of printing equipment and comprises a base and a positioning hook, a platform is mounted on the base and moves in the vertical direction relative to the base, a positioning crank mechanism is arranged on the base, the positioning hook is rotatably connected with the platform, and the positioning crank mechanism is a power structure for rotation and / or movement of the positioning hook. A cam is rotationally connected to the base and abuts against the positioning crank mechanism, when the platform moves in the vertical direction, the cam rotates at the same time, the platform and the cam move in a matched mode to drive the positioning crank mechanism to move, and therefore the positioning hook and the gripper bar are positioned. The invention further discloses a gripper bar positioning method. The platform and the cam share one power source, extra power does not need to be added, it can be guaranteed that the positioning action and the platform motion time sequence are kept consistent, meanwhile, the structural mode that the cam is matched with the positioning crank mechanism to move occupies a small space, and the mechanism is more suitable for the working conditions of multiple units and space shortage.

Description

Technical Field

[0001] The present invention belongs to the technical field of printing equipment, and particularly relates to a gripper positioning device and method. Background Art

[0002] Currently, the market has an increasing demand for multi-unit post-press equipment to complete any two or more processes among hot stamping, embossing, and die-cutting in one pass of the paper, and may also include waste removal and finished product removal processes. However, as the number of processing stations such as the main machine and paper waste removal increases, the number of grippers and the length of the gripper chain of the entire machine will increase proportionally. After long-term use, the gripper chain will be stretched and the chain length will increase, thus having a very serious impact on the processing accuracy of the machine.

[0003] Although the gripper positioning device described in Chinese Patent CN107416549B has a positioning direction opposite to the movement direction of the gripper and can also eliminate the influence of gripper chain stretching on the positioning accuracy, the structure involved in this patent is complex, the adjustment is cumbersome, it occupies a large space, and the power transmission is complex. When extended for use on a multi-unit die-cutting machine or hot stamping machine, the transmission connecting rod is long, and the cumulative error generated by the structure is large. Moreover, after the positioning hook contacts the gripper, the positioning hook remains stationary, but the gripper will continue to rise with the moving platform. At this time, although the positioning hook does not disengage from the gripper, there will be relative sliding between it and the gripper, which easily causes the gripper to vibrate and the paper to wrinkle, affecting the die-cutting and hot stamping quality of the final product.

[0004] Therefore, there is an urgent need to design a gripper positioning device to solve the problems of large error accumulation and large space occupation caused by the above-mentioned complex structure. Summary of the Invention

[0005] To solve the technical problems of large error accumulation and large space occupation caused by the complex structure mentioned in the background art, and to provide transmission stability, a gripper positioning device and method are provided to solve the above problems.

[0006] To achieve the above object, the specific technical solutions of the gripper positioning device and method of the present invention are as follows: A gripper positioning device includes a base and a positioning hook. A platform is installed on the base, and the platform moves relative to the base in the vertical direction. A positioning crank mechanism is provided on the base. The positioning hook is rotatably connected to the platform. The positioning crank mechanism is a power structure for the rotation and / or movement of the positioning hook. A cam is rotatably connected to the base, and the cam abuts against the positioning crank mechanism. When the platform moves in the vertical direction, the cam rotates simultaneously. The movement of the platform and the cam cooperate to drive the positioning crank mechanism to move, so that the positioning hook positions with the gripper.

[0007] Furthermore, the platform and the cam are powered by the same power source, and the power source is a motor.

[0008] Further, the base is a station base capable of performing die-cutting, hot stamping or indentation processes. The station includes an upper platform and a lower platform, and the corresponding processes are completed through the opening and closing movements of the upper and lower platforms. The platform is the lower platform. The vertical movement of the platform is achieved by transmitting the rotational power of the motor to the crankshaft. The crankshaft drives the toggle link to reciprocate through the connecting rod, thereby driving the platform to move in the vertical direction. The cam is fixedly connected to the crankshaft, and the crankshaft rotates synchronously with the cam.

[0009] Further, the positioning crank mechanism includes a connecting rod structure and a spring rod. The positioning hook moves vertically upward with the platform. Below the connection point of the positioning hook and the platform, it is hinged to the spring rod. The movement of the platform drives the positioning hook to rotate. One end of the spring rod away from the positioning hook is hinged to the connecting rod structure. The cam provides the movement power for the connecting rod structure. When the cam rotates, the connecting rod structure drives the spring rod to move. Under the combined action of the platform and the cam, the positioning hook positions the tooth row. The connecting rod structure includes an adjusting joint. One end of the spring rod away from the positioning hook is hinged with an adjusting joint. The end of the adjusting joint away from the spring rod is hinged to the base. The adjusting joint abuts and fits against the cam. When the motor rotates, the cam drives the adjusting joint to move, thereby driving the spring rod to move by the adjusting joint. Under the combined action of the platform and the cam, the positioning hook positions the tooth row. The connecting rod structure further includes a swing rod. The swing rod is rotatably connected at a fixed position. The fixed position can be on the outer shell of the tooth row positioning device or on the base. The adjusting joint and the spring rod are hinged through the swing rod. The tooth row positioning devices are arranged on both sides of the platform to position the tooth row. The swing rod connects the hinge points between the adjusting joints and the spring rods in the tooth row positioning devices on both sides of the platform. The swing rod is provided with a first hinge point, which is hinged to the spring rod. The swing rod is provided with a second hinge point, which is hinged to the adjusting joint. The swing rod is provided with a third hinge point, and a tension spring is arranged at the third hinge point. One end of the tension spring away from the third hinge point is fixedly connected to the base, so that the adjusting joint tightly abuts against the cam through the tension spring. The adjusting joint includes a first connecting rod, which is hinged to the base. One end of the first connecting rod away from the base is hinged to a second connecting rod. One end of the second connecting rod away from the first connecting rod is hinged to the swing rod. The hinge point position between the first connecting rod and the second connecting rod abuts and fits against the cam.

[0010] Further, a follower bearing is arranged at the hinge point position between the first connecting rod and the second connecting rod. The first connecting rod and the second connecting rod abut and fit against the cam through the follower bearing.

[0011] Further, the cam includes a stable arc edge and an adjusting arc edge. When the connecting rod structure contacts the stable arc edge, the position of the connecting rod structure is relatively constant. Preferably, when the adjustment joint in the connecting rod structure contacts the stable arc edge, the position of the adjustment joint is relatively constant. When the connecting rod structure contacts the adjustment arc edge, the connecting rod structure drives the spring rod to move. Preferably, when the adjustment joint in the connecting rod structure contacts the adjustment arc edge, the adjustment arc edge drives the spring rod to move through the adjustment joint and the swing rod, and cooperates with the movement of the platform to jointly complete the positioning of the positioning hook to the dental row.

[0012] Furthermore, the platform and the positioning hook are rotatably connected through a mounting seat. The mounting seat is fixedly connected to the platform. A rotating shaft is provided on the mounting seat, and the rotating shaft is rotatably connected to the positioning hook.

[0013] Furthermore, a limiting block is provided on the mounting seat to limit the rotation angle of the positioning hook; An adjustment hole is provided on the mounting seat. An adjustment bolt is provided in the adjustment hole. After passing through the adjustment hole, the adjustment bolt is connected to the limiting block, thereby adjusting the relative position of the limiting block; A first reference surface is provided on the positioning hook for abutting against the limiting block. A second reference surface is provided on the positioning hook for abutting against the dental row, thereby positioning the dental row in the first direction; A supporting block is provided on the mounting seat, and the supporting block abuts against the dental row, thereby positioning the dental row in the second direction.

[0014] Another object of the present invention is to provide a method for positioning a dental row, including the following steps: S1. The positioning hook rotates along the first rotation direction until it abuts against the limiting block; S2. The positioning hook waits for the dental row to contact the positioning hook; S3. After the positioning hook contacts the dental row, the positioning is completed; S4. After the positioning is completed, the platform completes the post-printing process of this station, and the positioning hook rotates in the direction opposite to the first rotation direction to vacate the space for the movement of the dental row; S5. The dental row moves away to the next station.

[0015] Furthermore, step S1 includes the following steps: S101. The motor rotates. While the platform moves in the vertical direction, the cam rotates. The platform and the cam cooperate to drive the positioning crank mechanism to move. The positioning hook among them rises together with the platform. During the rising process, the stable arc edge of the cam abuts against the adjustment joint. The platform drives the positioning hook to move along the first rotation direction, and the first reference surface of the positioning hook abuts against the limiting block; S102. The positioning hook stops rotating, and the platform and the positioning hook continue to rise. During the rising process, the spring rod stretches to adapt to the height change of the positioning hook during the rising process of the platform; S103. The positioning hook continues to rise with the platform. As the platform rises, the stretching amount of the spring rod increases, and the adjusting arc edge of the cam abuts against the adjusting joint, causing the stretching of the spring rod to reach a predetermined value, ensuring that the positioning hook always abuts against the limiting block and having sufficient pulling force to ensure that the positioning hook will not disengage from the limiting block when contacting the tooth row subsequently.

[0016] The tooth row positioning device and method of the present invention have the following advantages: The platform and the cam of the present invention share a power source, without the need to additionally increase power, and can ensure that the positioning action is consistent with the movement timing of the platform. At the same time, the structural mode of the cam cooperating with the positioning crank mechanism occupies less space and is more suitable for working conditions with multiple units and limited space.

[0017] The present invention ensures that the positioning hook is in contact with the tooth row at all times when positioning the tooth row during the movement process through the spring rod, and ensures that the cam and the connecting rod structure are in contact at all times through the tension spring, making the positioning more stable and reducing wear.

[0018] The positioning crank mechanism of the present invention is coordinated by dual power. Through the combined operation of the platform and the cam, the device has high flexibility, can cooperate to enable the positioning hook to reach the positioning position in advance, and avoid the problem that the tooth row continues to rise with the platform and continuously rubs against the positioning hook when positioning the tooth row. At the same time, after positioning is completed, the positioning hook can quickly leave the working area of the tooth row, meeting the requirement for the quick departure of the tooth row and avoiding interference.

[0019] The present invention can complete the adjustment of the angle of the positioning hook by adjusting the position of the limiting block, and the adjustment is convenient and reliable.

[0020] The present invention completes the positioning work by setting the positioning hook to reach the position where it can be positioned in advance and stopping the movement of the tooth row. The positioning process is simple and straightforward, avoiding the excessive impact force generated by the collision between the tooth row and the positioning hook, and further avoiding the problem that the front of the paper moves backward and the back of the paper moves forward. Different movement directions of the whole paper will cause the paper to shake, thus affecting the processing accuracy. Therefore, the positioning principle of the present invention is clear, the positioning structure is simple, the response is rapid, and there are no redundant actions; the paper does not shake due to repeated movements, improving the accuracy of subsequent processes; after the supporting block supports the tooth row during the rising process, the tooth row positioning device and the tooth row are in static contact, the tooth row has no shaking, small wear, and long service life. Description of the Drawings

[0021] Figure 1 It is the overall schematic diagram of the tooth row positioning device of the present invention; Figure 2 It is the side view of the tooth row positioning device of the present invention; Figure 3 It is the side view of the crank positioning mechanism of the present invention; Figure 4 It is the schematic diagram of the crank positioning mechanism of the present invention; Figure 5 Schematic diagram of the positioning hook structure of the present invention; Figure 6 Schematic diagram of the spring rod structure of the present invention; Figure 7 Flowchart of the method for positioning the dental row of the present invention.

[0022] Description of the markings in the figure: 1. Base; 2. Crankshaft; 3. Platform; 301. Toggle lever; 4. Cam; 401. Stable arc edge; 402. Adjusting arc edge; 5. Positioning crank mechanism; 501. Positioning hook; 5011. First reference plane; 5012. Second reference plane; 502. Spring rod; 5021. Spherical plain bearing; 5022. Spring connecting rod; 5023. Compression spring; 5024. Sleeve; 5025. Rod base; 503. Adjusting joint; 5031. First connecting rod; 5032. Second connecting rod; 5033. Follow-up bearing; 6. Rocker arm; 601. Rocker plate; 602. Pulling spring; 100. First hinge point; 200. Second hinge point; 300. Third hinge point; 7. Mounting seat; 701. Limit block; 702. Support block; 703. Adjusting bolt; 8. Rotating shaft; 9. Dental row. Detailed implementation manners

[0023] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0024] Those skilled in the art can understand that although some of the embodiments herein include some features included in other embodiments rather than other features, the combination of the features of different embodiments means that it is within the scope of the present invention and forms different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0025] Next, refer to the attached Figure 1 to the attached Figure 7 to describe the dental row positioning device and method of the present invention.

[0026] A dental row positioning device, as Figures 1-7As shown, it includes a base 1 and a positioning hook 501. A platform 3 is installed on the base 1. The platform 3 moves relative to the base 1 in the vertical direction. A positioning crank mechanism 5 is provided on the base 1. The positioning hook 501 is rotatably connected to the platform 3. The positioning crank mechanism 5 is a power structure for the rotation and / or movement of the positioning hook 501. A cam 4 is rotatably connected to the base 1. The cam 4 abuts against the positioning crank mechanism 5. When the platform 3 moves in the vertical direction, the cam 4 rotates simultaneously. The movement of the platform 3 and the cam 4 cooperate to drive the positioning crank mechanism 5 to move, so that the positioning hook 501 is positioned with the tooth row 9, thus simplifying the structure, reducing the space occupied by the structure, and providing the stability of transmission.

[0027] Preferably, as Figure 1 shown, the platform 3 and the cam 4 share the same power source, and the power source is a motor. Specifically, the platform 3 and the cam 4 share a power source, without the need to add an additional power source, so as to ensure that the positioning action is completely consistent with the movement timing of the platform 3. The structure is simple, avoiding the error superposition caused by complex structures, occupying less space, and being more suitable for working conditions with multiple units and limited space.

[0028] Preferably, the base 1 is a station base that can perform die-cutting, hot stamping or indentation processes. The station includes an upper platform and a lower platform, and the corresponding processes are completed through the opening and closing movement of the upper and lower platforms. The platform 3 is the lower platform. The vertical movement of the platform 3 is achieved by transmitting the rotational power of the motor to the crankshaft 2. The crankshaft 2 drives the toggle lever 301 to reciprocate through the connecting rod, thereby driving the platform 3 to move in the vertical direction. The cam 4 is fixedly connected to the crankshaft 2, and the crankshaft 2 rotates synchronously with the cam 4. Specifically, the reciprocating action of the platform 3 and the rotation of the cam 4 are controlled by the same power source, and then the positioning action of the positioning crank mechanism 5 is controlled through the movement of the platform 3 and the cam 4, so as to realize the simplification and miniaturization of the device structure under the working conditions of multiple units and limited space.

[0029] Preferably, as Figures 1-3As shown, the positioning crank mechanism 5 includes a connecting rod structure and a spring rod 502. The positioning hook 501 moves vertically upward with the platform 3. Below the connection point of the positioning hook 501 and the platform 3, it is hinged to the spring rod 502. The movement of the platform 3 drives the positioning hook 501 to rotate. One end of the spring rod 502 away from the positioning hook 501 is hinged to the connecting rod structure. The cam 4 provides the driving force for the connecting rod structure. When the cam 4 rotates, the connecting rod structure drives the spring rod 502 to move. Under the combined action of the platform 3 and the cam 4, the positioning hook 501 positions the dental row 9. The connecting rod structure includes an adjustment joint 503. One end of the spring rod 502 away from the positioning hook 501 is hinged with an adjustment joint 503. The end of the adjustment joint 503 away from the spring rod 502 is hinged to the base 1. The adjustment joint 503 abuts and fits with the cam 4. When the motor rotates, the cam 4 drives the adjustment joint 503 to move, so that the adjustment joint 503 drives the spring rod 502 to move. Under the combined action of the platform 3 and the cam 4, the positioning hook 501 positions the dental row 9. Specifically, the positioning crank mechanism 5 makes the positioning hook 501 reach the positioning position through the telescoping of the spring rod 502 and the adjustment movement of the connecting rod structure in cooperation with the movement of the platform 3 in the vertical direction. Among them, as Figure 3 shown, the relationship between the rotation direction of the positioning hook 501 and the movement direction of the dental row 9 is: when the dental row 9 moves in the first direction A, the positioning hook 501 rotates along the first rotation direction C under the drive of the platform 3, so that the positioning direction of the dental row 9 is opposite to the movement direction of the dental row 9, ensuring that when the chain of the dental row 9 has a large tensile deformation, the positioning crank mechanism 5 can still accurately position the dental row 9, thereby extending the service life of the chain of the dental row 9. Among them, the first direction A is the paper feeding direction.

[0030] Optionally, in other embodiments, the movement of the platform 3 in the vertical direction uses the motor as the power source, and the cam 4 selects the servo motor as the power source. By adjusting the set data of the motor and the servo motor so that they can cooperate to achieve the effect of synchronous movement, and then the platform 3 and the cam 4 cooperate together to control the movement of the positioning crank mechanism 5.

[0031] Preferably, the connecting rod structure further includes a swing rod 6. The swing rod 6 is rotatably connected at a fixed position. The fixed position can be on the outer shell of the dental row positioning device or on the base 1. The adjustment joint 503 and the spring rod 502 are hinged through the swing rod 6. The dental row positioning devices are arranged on both sides of the platform 3 to position the dental row 9. The adjustment joints 503 and the spring rod 502 of the dental row positioning devices on both sides of the platform 3 are connected through the swing rod 6. Specifically, the positioning crank mechanisms 5 on both sides are connected through the swing rod 6 to make the positioning crank mechanisms 5 on both sides move synchronously.

[0032] Preferably, a first hinge point 100 is provided on the swing rod 6. The first hinge point 100 is hinged to the spring rod 502. A second hinge point 200 is provided on the swing rod 6. The second hinge point 200 is hinged to the adjustment joint 503. A third hinge point 300 is provided on the swing rod 6. A tension spring 602 is provided on the third hinge point 300. One end of the tension spring 602 away from the third hinge point 300 is fixedly connected to the base 1. Thus, the adjustment joint 503 is tightly abutted against the cam 4 through the tension spring 602. Specifically, swing plates 601 are provided at both ends of the swing rod 6. The first hinge point 100, the second hinge point 200 and the third hinge point 300 are provided on the swing plates 601. The swing rod 6 makes the cam 4 and the connecting rod structure in close contact at all times through the tension spring 602, ensuring the stability of positioning, making the dental row 9 have no jitter after positioning, so that the paper has no jitter, improving the accuracy of subsequent processes, and reducing structural wear, making the service life of the dental row 9 longer.

[0033] Preferably, the adjustment joint 503 includes a first connecting rod 5031. The first connecting rod 5031 is hinged to the base 1. One end of the first connecting rod 5031 away from the base 1 is hinged to a second connecting rod 5032. One end of the second connecting rod 5032 away from the first connecting rod 5031 is hinged to the swing rod 6. The hinge point position of the first connecting rod 5031 and the second connecting rod 5032 is in abutting fit with the cam 4. Specifically, the adjustment joint 503 ensures that it has a rich motion curve, so as to meet the motion requirements of the positioning crank mechanism 5 during the positioning process. At the same time, optionally, the adjustment joint 503 can also be set as a rigid structure that does not deform, as long as it can meet the motion curve of the positioning crank mechanism 5 during the motion process.

[0034] Preferably, a follower bearing 5033 is provided at the hinge point position of the first connecting rod 5031 and the second connecting rod 5032. The first connecting rod 5031 and the second connecting rod 5032 are in abutting fit with the cam 4 through the follower bearing 5033. The follower bearing 5033 and the cam 4 always maintain a tangent state of mutual contact, so as to ensure that the cam 4 can stably transmit the variable-speed motion to the adjustment joint 503, making the adjustment joint 503 cooperate with the spring rod 502 to position the positioning hook 501. And the use of the follower bearing 5033 makes the connection between the adjustment joint 503 and the cam 4 reliable, the motion smooth, and the transmission accuracy ensured.

[0035] Preferably, the cam 4 includes a stable arc edge 401 and an adjusting arc edge 402. When the adjusting joint 503 contacts the stable arc edge 401, the position of the adjusting joint 503 is relatively constant. When the adjusting joint 503 contacts the adjusting arc edge 402, the adjusting arc edge 402 drives the spring rod 502 to move through the adjusting joint 503 and the swing rod 6, and cooperates with the platform 3 to move, jointly completing the positioning of the positioning hook 501 to the dental row 9. Specifically, when the stable arc edge 401 abuts against the adjusting joint 503, the distances from the points on the stable arc edge 401 to the rotation center of the cam 4 are the same, thereby controlling the relative position between the adjusting joint 503 and the swing rod 6 to remain unchanged, causing the positioning hook 501 to rise with the moving platform 3 and rotate along the first rotation direction C; when the rotation angle of the positioning hook 501 reaches the position, as the platform 3 continues to rise, the length of the spring rod 502 changes accordingly; when the adjusting arc edge 402 abuts against the adjusting joint 503, the distances from the points on the adjusting arc edge 402 to the rotation center of the cam 4 are different, thereby realizing the adjustment of the stretching amount of the spring rod 502 through the cam 4 and the adjusting joint 503, and achieving the effect that the positioning hook 501 can swing quickly, thus solving the problem of slow response speed of the positioning hook 501 when only using the spring rod 502 for positioning, so that the positioning hook 501 can reach the positioning position before the dental row 9 arrives, wait for the dental row 9, and avoid the impact force generated when the dental row 9 and the positioning hook 501 arrive simultaneously from being transmitted to the paper surface clamped by the dental row 9, thereby causing processing errors, and further ensuring the running speed and accuracy of the device and improving production efficiency.

[0036] Meanwhile, it can be understood that on the basis of the above technical solution, the cam 4 and the adjusting joint 503 can also be cancelled, and a servo motor can be directly arranged on the rotating shaft of the swing rod 6 to make the swing rod 6 cooperate with the spring rod 502 to move, so as to achieve the technical effect of the above technical solution; or, the cam 4, the adjusting joint 503 and the spring rod 502 can be cancelled, and a servo push rod can be directly used to connect with the positioning hook 501, and by adjusting the extending length of the servo push rod in real time, the technical effect of the above technical solution can be achieved; or, a servo motor can be directly arranged on the rotating shaft 8 of the positioning hook 501, the servo motor controls the rotation of the positioning hook 501, and the servo motor drives the positioning hook 501 to move following the movement timing of the host, so as to achieve the technical effect of the above technical solution.

[0037] Preferably, the platform 3 and the positioning hook 501 are rotationally connected through a mounting seat 7, as Figure 3 and Figure 4 shown, the mounting seat 7 is fixedly connected with the platform 3, a rotating shaft 8 is arranged on the mounting seat 7, and the rotating shaft 8 is rotationally connected with the positioning hook 501. Specifically, the positioning hook 501 rotates around the rotating shaft 8 along the first rotation direction C or in the direction opposite to the first rotation direction C.

[0038] Preferably, a limiting block 701 is provided on the mounting base 7 to limit the rotation angle of the positioning hook 501. Specifically, the limiting block 701 calibrates and restricts the position where the positioning hook 501 stops swinging.

[0039] Preferably, an adjustment hole is formed in the mounting base 7, and an adjustment bolt 703 is arranged in the adjustment hole. The adjustment bolt 703 passes through the adjustment hole and is connected to the limiting block 701, so as to adjust the relative position of the limiting block 701. The angle of the positioning hook 501 is adjusted by the adjustment bolt 703 on the mounting base 7, so as to ensure the consistency of the contact angle between the positioning hook 501 and the tooth row 9 each time.

[0040] Furthermore, a first reference surface 5011 is provided on the positioning hook 501 for abutting against the limiting block 701, and a second reference surface 5012 is provided on the positioning hook 501 for abutting against the tooth row 9, so as to position the tooth row 9 in the first direction A through the second reference surface 5012.

[0041] Furthermore, a supporting block 702 is provided on the mounting base 7, and the supporting block 702 abuts against the tooth row 9, so as to position the tooth row 9 in the second direction B. Wherein, the second direction B is the direction perpendicular to the first direction A on the horizontal working surface, so as to accurately position the position of the tooth row 9 through the cooperation of the positioning hook 501 and the supporting block 702.

[0042] Preferably, a positioning surface matching the second reference surface 5012 is provided on the tooth row 9, and the second reference surface 5012 is attached to the positioning surface to complete the positioning of the tooth row 9.

[0043] Preferably, as Figure 6 shown, the spring rod 502 includes a spherical plain bearing 5021, a spring connecting rod 5022, a compression spring 5023, a sleeve 5024 and a rod seat 5025. Among them, the spherical plain bearing 5021 is rotatably connected to the positioning hook 501, and the rod seat 5025 is rotatably connected to the swing rod 6. When the first reference surface 5011 of the positioning hook 501 contacts the limiting block 701, as the platform 3 rises, the spring rod 502 is stretched, and at the same time, the compression spring 5023 is compressed by the spring connecting rod 5022, so as to ensure that there is a stable extrusion force when the second reference surface 5012 of the positioning hook 501 contacts the positioning surface of the tooth row 9.

[0044] Another object of the present invention is to provide a method for positioning a tooth row, as Figure 7 shown, including the following steps: S1. The positioning hook 501 rotates along the first rotation direction C to abut against the limiting block 701. Specifically, it includes the following steps: S101. The motor rotates. While the platform 3 moves in the vertical direction, the cam 4 rotates. The platform 3 and the cam 4 move in cooperation, driving the positioning crank mechanism 5 to move. The positioning hook 501 among them rises together with the platform 3. During the rising process, the stable arc edge 401 of the cam 4 abuts against the adjusting joint 503. The platform 3 drives the positioning hook 501 to move along the first rotation direction C, and the first reference plane 5011 of the positioning hook 501 abuts against the limiting block 701. S102. The positioning hook 501 stops rotating, and the platform 3 and the positioning hook 501 continue to rise. During the rising process, the spring rod 502 stretches to adapt to the height change of the positioning hook 501 during the rising of the platform 3. S103. The positioning hook 501 continues to rise with the platform 3. The rising of the platform 3 causes the stretching amount of the spring rod 502 to increase. The adjusting arc edge 402 of the cam 4 abuts against the adjusting joint 503, making the stretching of the spring rod 502 reach a predetermined value, ensuring that the positioning hook 501 always abuts against the limiting block 701 and having sufficient pulling force to ensure that when the positioning hook 501 contacts the tooth row 9 subsequently, the positioning hook 501 will not break away from the limiting block 701.

[0045] S2. The positioning hook 501 waits for the tooth row 9 to contact the positioning hook 501. S3. After the positioning hook 501 contacts the tooth row 9, positioning is completed. S4. After positioning is completed, the platform 3 completes the post-printing process of this station. The positioning hook 501 rotates in the direction opposite to the first rotation direction C, leaving space for the movement of the tooth row 9. S5. The tooth row 9 moves away to the next station.

[0046] In the present invention, the platform 3 and the cam 4 share a power source, without the need to additionally increase power, and can ensure that the positioning action is consistent with the movement timing of the platform 3. At the same time, the structural mode of the cam 4 cooperating with the positioning crank mechanism 5 occupies less space and is more suitable for working conditions with multiple units and limited space.

[0047] In the present invention, the spring rod 502 ensures that the positioning hook 501 is in contact with the tooth row 9 at all times when positioning the tooth row 9 during the movement process. The tension spring 602 ensures that the cam 4 is in contact with the connecting rod structure 503 at all times, making the positioning more stable and reducing wear.

[0048] The positioning crank mechanism 5 of the present invention is cooperated by dual power sources. Through the combined operation of the platform 3 and the cam 4, the device has high flexibility, can cooperate to enable the positioning hook 501 to reach the positioning position in advance, and avoid the problem that the positioning hook 501 continuously rubs against the tooth row 9 due to the tooth row 9 continuing to rise with the platform 3 when positioning the tooth row 9. At the same time, after positioning is completed, the positioning hook 501 can quickly leave the working area of the tooth row 9, meeting the requirement for the quick departure of the tooth row 9 and avoiding interference.

[0049] In the present invention, the adjustment of the angle of the positioning hook can be completed by adjusting the position of the limiting block 701, which is convenient and reliable.

[0050] In the present invention, by setting the positioning hook 501 to reach the position where it can be positioned in advance, the positioning work is completed when the movement of the tooth row 9 stops. The positioning process is simple and straightforward, avoiding the excessive impact force generated by the collision between the tooth row 9 and the positioning hook 501, and thus avoiding the problem that the front end of the paper moves backward and the rear end of the paper moves forward. Since the movement directions of the whole paper are different, paper jitter will occur, which will affect the processing accuracy. Therefore, the positioning principle of the present invention is clear, the positioning structure is simple, the response is rapid, and there is no redundant action; the paper does not jitter due to repeated movement, improving the accuracy of subsequent processes; after the supporting block 702 supports the tooth row 9 during the rising process, the tooth row positioning device and the tooth row 9 are in static contact, the tooth row 9 has no jitter, small wear, and long service life.

[0051] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A tooth row positioning device, characterized in that, It includes a base (1) and a positioning hook (501). A platform (3) is installed on the base (1). The platform (3) moves relative to the base (1) in the vertical direction. A positioning crank mechanism (5) is provided on the base (1). The positioning hook (501) is rotatably connected to the platform (3). The positioning crank mechanism (5) is a power structure for the rotation and / or movement of the positioning hook (501). A cam (4) is rotatably connected to the base (1). The cam (4) abuts against the positioning crank mechanism (5). When the platform (3) moves in the vertical direction, the cam (4) rotates simultaneously. The movement of the platform (3) and the cam (4) cooperate to drive the positioning crank mechanism (5) to move, so that the positioning hook (501) positions with the tooth row (9).

2. The tooth row positioning device according to claim 1, characterized in that, The platform (3) and the cam (4) share the same power source, and the power source is a motor.

3. The dental row positioning device according to claim 1, characterized in that, The base (1) is a working station base capable of performing die-cutting, hot stamping or indentation processes. The working station includes an upper platform and a lower platform, and the corresponding processes are completed through the opening and closing movement of the upper and lower platforms. The platform (3) is the lower platform. The vertical movement of the platform (3) is achieved by transmitting the rotational power of the motor to the crankshaft (2). The crankshaft (2) drives the toggle link (301) to reciprocate through a connecting rod, thereby driving the platform (3) to move in the vertical direction. The cam (4) is fixedly connected to the crankshaft (2), and the crankshaft (2) rotates synchronously with the cam (4).

4. The tooth row positioning device according to claim 1, characterized in that, The positioning crank mechanism (5) includes a connecting rod structure and a spring rod (502). As the platform (3) moves vertically upward, the positioning hook (501) is hinged below the connection point of the positioning hook (501) and the platform (3) to the spring rod (502). The movement of the platform (3) drives the positioning hook (501) to rotate. The end of the spring rod (502) away from the positioning hook (501) is hinged to the connecting rod structure. The cam (4) provides the movement power for the connecting rod structure. When the cam (4) rotates, the connecting rod structure drives the spring rod (502) to move. Under the combined action of the platform (3) and the cam (4), the positioning hook (501) positions the tooth row (9). The connecting rod structure includes an adjustment joint (503). The end of the spring rod (502) away from the positioning hook (501) is hinged with an adjustment joint (503). The end of the adjustment joint (503) away from the spring rod (502) is hinged to the base (1). The adjustment joint (503) abuts and fits with the cam (4). When the motor (2) rotates, the cam (4) drives the adjustment joint (503) to move, so that the adjustment joint (503) drives the spring rod (502) to move. Under the combined action of the platform (3) and the cam (4), the positioning hook (501) positions the tooth row (9). The connecting rod structure further includes a swing rod (6). The swing rod (6) is rotatably connected at a fixed position. The fixed position can be on the outer shell of the tooth row positioning device or on the base (1). The adjustment joint (503) and the spring rod (502) are hinged through the swing rod (6). The row positioning device is arranged on both sides of the platform (3) to position the row (9). The hinge points between the adjusting joints (503) and the spring rods (502) in the row positioning devices on both sides of the platform (3) are connected by a swing rod (6). A first hinge point (100) is arranged on the swing rod (6). The first hinge point (100) is hinged to the spring rod (502). A second hinge point (200) is arranged on the swing rod (6). The second hinge point (200) is hinged to the adjusting joint (503). A third hinge point (300) is arranged on the swing rod (6). A tension spring (602) is arranged on the third hinge point (300). One end of the tension spring (602) away from the third hinge point (300) is fixedly connected to the base (1), so that the adjusting joint (503) tightly abuts against the cam (4) through the tension spring (602). The adjusting joint (503) includes a first connecting rod (5031). The first connecting rod (5031) is hinged to the base (1). One end of the first connecting rod (5031) away from the base (1) is hinged to a second connecting rod (5032). One end of the second connecting rod (5032) away from the first connecting rod (5031) is hinged to the swing rod (6). The hinge point position between the first connecting rod (5031) and the second connecting rod (5032) abuts and fits with the cam (4).

5. The dental row positioning device according to claim 4, characterized in that, A follower bearing (5033) is arranged at the hinge point position between the first connecting rod (5031) and the second connecting rod (5032). The first connecting rod (5031) and the second connecting rod (5032) abut and fit with the cam (4) through the follower bearing (5033).

6. The tooth row positioning device according to claim 4, characterized in that, The cam (4) includes a stable arc edge (401) and an adjusting arc edge (402). When the connecting rod structure contacts the stable arc edge (401), the position of the connecting rod structure is relatively constant. Preferably, when the adjusting joint (503) in the connecting rod structure contacts the stable arc edge (401), the position of the adjusting joint (503) is relatively constant. When the connecting rod structure contacts the adjusting arc edge (402), the connecting rod structure drives the spring rod (502) to move. Preferably, when the adjusting joint (503) in the connecting rod structure contacts the adjusting arc edge (402), the adjusting arc edge (402) drives the spring rod (502) to move through the adjusting joint (503) and the swing rod (6), and cooperates with the movement of the platform (3) to jointly complete the positioning of the row (9) by the positioning hook (501).

7. The dental row positioning device according to claim 4, characterized in that, The platform (3) and the positioning hook (501) are rotationally connected through a mounting seat (7). The mounting seat (7) is fixedly connected to the platform (3). A rotating shaft (8) is arranged on the mounting seat (7). The rotating shaft (8) is rotationally connected to the positioning hook (501).

8. The dental row positioning device according to claim 7, characterized in that, A limiting block (701) is arranged on the mounting seat (7) to limit the rotation angle of the positioning hook (501). An adjusting hole is formed on the mounting seat (7). An adjusting bolt (703) is arranged in the adjusting hole. After passing through the adjusting hole, the adjusting bolt (703) is connected to the limiting block (701), so as to adjust the relative position of the limiting block (701). The positioning hook (501) is provided with a first reference plane (5011) for abutting against the limit block (701), and the positioning hook (501) is provided with a second reference plane (5012) for abutting against the tooth row (9), so as to position the tooth row (9) in the first direction; The mounting seat (7) is provided with a supporting block (702), and the supporting block (702) abuts against the tooth row (9), so as to position the tooth row (9) in the second direction.

9. A method for positioning a row of teeth, characterized in that, It includes the following steps: S1. The positioning hook (501) rotates in the first rotation direction until it abuts against the limit block (701); S2. The positioning hook (501) waits for the tooth row (9) to contact the positioning hook (501); S3. After the positioning hook (501) contacts the tooth row (9), the positioning is completed; S4. After the positioning is completed, the platform (3) completes the post-printing process of this station, and the positioning hook (501) rotates in the direction opposite to the first rotation direction to vacate the space for the movement of the tooth row (9); S5. The tooth row (9) moves away to the next station.

10. The tooth row positioning method according to claim 9, using the tooth row positioning device according to any one of claims 1-8, wherein, S1 includes the following steps: S101. The motor rotates, and while the platform (3) moves in the vertical direction, the cam (4) rotates. The platform (3) and the cam (4) cooperate to drive the positioning crank mechanism (5) to move. The positioning hook (501) among them rises together with the platform (3). During the rising process, the stable arc edge (401) of the cam (4) abuts against the adjusting joint (503). The platform (3) drives the positioning hook (501) to move in the first rotation direction, and the first reference plane (5011) of the positioning hook (501) abuts against the limit block (701); S102. The positioning hook (501) stops rotating, and the platform (3) and the positioning hook (501) continue to rise. During the rising process, the spring rod (502) is stretched to adapt to the height change of the positioning hook (501) during the rising process of the platform (3); S103. The positioning hook (501) continues to rise with the platform (3). The rising of the platform (3) causes the stretching amount of the spring rod (502) to increase. The adjusting arc edge (402) of the cam (4) abuts against the adjusting joint (503), so that the stretching of the spring rod (502) reaches a predetermined value, ensuring that the positioning hook (501) always abuts against the limit block (701) and has sufficient pulling force to ensure that the positioning hook (501) will not disengage from the limit block (701) when contacting the tooth row (9) subsequently.

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