A conveying structure and feeding device for thick film resistors

Abstract

This invention discloses a handling structure and feeding device for thick-film resistors in the field of thin-plate handling technology, aiming to solve the problems of low handling efficiency and easy damage to the resistive film layer in existing technologies. It includes a thick-film resistor mounted on a substrate, and a mounting frame. A clamp is fixedly mounted on the mounting frame, and a hollow pulley is rotatably mounted on the clamp. A double-chain spiral conveying rod assembly is fixedly mounted on the lower end face of the hollow pulley. The double-chain spiral conveying rod assembly consists of two centrally symmetrical spiral rods. A fixing rod is also fixedly mounted on the mounting frame, penetrating the hollow pulley. A guide structure for preventing the resistor from deflecting is fixedly mounted at the lower end of the fixing rod. This invention achieves efficient feeding of thick-film resistors, eliminating the need for an adsorption structure. It can stably stack the resistors vertically during unloading and orderly release them downwards during unloading. It is highly efficient and less prone to wear on the resistive film, offering good economic benefits.

Description

Technical Field

[0001] This invention relates to a handling structure and feeding device for thick film resistors, belonging to the field of thin plate handling technology. Background Technology

[0002] High-power thick-film planar resistors are larger in size than small thick-film resistors. Due to their larger size and greater freedom in laser adjustment, they can be widely used in circuit connection systems with less demanding requirements.

[0003] Before leaving the factory, thick-film resistors need to undergo laser-adjusted resistance and circuit resistance testing according to customer requirements to ensure product quality. Currently, the main method for handling thick-film resistors on the processing line is to place them on the corresponding processing line using suction cups. However, this method has two drawbacks. First, high-speed airflow is easily generated at the suction point, and dust particles in the air can easily rub against the resistor surface, causing wear on the printed resistor sheet. The direct contact between the suction cup and the surface of the resistor sheet can also easily cause wear, thus affecting the actual resistance value of the resistor sheet and the effect of laser adjustment. Second, suction cup handling can usually only handle one thick-film resistor sheet at a time, and cannot handle multiple resistor sheets simultaneously. This means that after placing the semi-finished product on the processing line, the robot arm needs to move back and forth to the picking station to pick up the material. This not only increases the power consumption of the equipment but also greatly prolongs the handling time, thus affecting the production line's capacity. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a conveying structure and feeding device for thick film resistors, which can achieve efficient feeding of thick film resistors without the need for an adsorption structure. The resistors can be stably stacked in the vertical direction during material handling and orderly fed downwards during material unloading. This method is efficient and does not easily cause wear to the resistor film, thus providing good economic benefits.

[0005] To achieve the above objectives, the present invention employs the following technical solution:

[0006] On one hand, the present invention provides a feeding structure for a thick film resistor, including a thick film resistor mounted on a substrate, and a mounting frame. A clamp is fixedly mounted on the mounting frame, and a hollow pulley is rotatably mounted on the clamp. A double-chain spiral conveying rod assembly is fixedly mounted on the lower end face of the hollow pulley. The double-chain spiral conveying rod assembly consists of two centrally symmetrical spiral rods. The diameter of the circle containing the double-chain spiral conveying rod assembly is greater than the width of the substrate and less than the length of the substrate. A fixing rod penetrating the hollow pulley is also fixedly mounted on the mounting frame. A guide structure for preventing the resistor located in the spiral interlayer of the double-chain spiral conveying rod assembly from deflecting is fixedly mounted at the lower end of the fixing rod. A drive assembly for driving the hollow pulley to rotate is provided on the mounting frame.

[0007] The guide structure includes two parallel limiting plates, the distance between the two limiting plates being greater than the width of the substrate; or, the substrate is provided with not less than two positioning holes, and the guide structure is a positioning rod that can be inserted into the positioning hole, the number of the positioning rod being not less than two.

[0008] Specifically, two symmetrical arc-shaped clamping plates are provided below the clamp, covering the outside of the double-chain spiral conveyor rod assembly. The width of the space left between the two arc-shaped clamping plates is greater than the width of the base plate, and the diameter of the circle containing the arc-shaped clamping plates is less than the length of the base plate.

[0009] On the other hand, the present invention provides a feeding device for thick film resistors, including a feeding plate and a working flow line. The feeding plate is provided with a plurality of hollow slots for placing resistors in an array. The working flow line is provided with a carrier for conveying resistors and adopts the thick film resistor conveying mechanism described in any one of the above. A feeding flow line is provided on one side of the working flow line. The feeding flow line is used to position and convey the feeding plate. A lifting mechanism is provided below the feeding flow line for lifting the substrate located in the hollow slots upward. A gantry transmission assembly is arranged between the feeding flow line and the working flow line. The mounting frame is fixedly mounted on the moving end of the gantry transmission assembly.

[0010] Specifically, the lifting mechanism includes a positioning plate located below the feeding flow line. An air pipe is slidably arranged on the positioning plate in the vertical direction. An adsorption head is provided at the top of the air pipe. A first cylinder for driving the air pipe to rise and fall is also provided on one side of the positioning plate. A negative pressure sensor is connected to the air pipe.

[0011] Specifically, the structure of the adsorption head is cylindrical and the outer diameter of the adsorption head is smaller than the width of the substrate; or, the adsorption head is rectangular and its length and width are smaller than the length and width of the substrate, respectively. The adsorption head includes an adsorption block connected to the air tube and multiple air slits disposed on the top of the adsorption block. An elastic layer is provided above the adsorption block.

[0012] Specifically, a pressure plate driven to rise and fall by a second cylinder is provided above the work flow line, and an L-shaped limiting plate is provided below the pressure plate. The corner of the L-shaped limiting plate can coincide with the corner of the placement slot on the carrier through the descent action. An ion fan blowing towards the corner of the L-shaped limiting plate is provided on one side of the work flow line.

[0013] Specifically, a height limit plate is provided below the included angle of the L-shaped limiting plate, and ventilation slots are provided on both the L-shaped limiting plate and the height limit plate.

[0014] Specifically, the gantry transmission assembly is provided with at least two sets along the conveying direction of the working flow line. The working flow line is provided with a horizontal moving module parallel to the conveying direction of the working flow line. The horizontal moving module is equipped with a movable block. The second cylinder and the ion fan are both mounted on the movable block.

[0015] Specifically, an adjustment plate is installed on the movable block, and the ion fan is rotatably mounted on the adjustment plate and can be relatively fixed with the adjustment plate.

[0016] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0017] This invention sets the feeding section of the thick film resistor as a double-chain spiral conveyor rod assembly. After the thick film resistor is lifted and limited by the guide structure, the lifting and rotating double-chain spiral conveyor rod assembly enables each thick film resistor sheet to move stably up or down in the interlayer between the two spiral rods. The thick film resistor sheets will not collide or contact each other. This can reduce the wear of the printed layer while realizing the accumulation of material in the interlayer between the spiral rods. When discharging, the reverse rotation can quickly realize the discharging of the thick film resistor sheets. There is no need to keep going back and forth to pick up material, which realizes the advantages of high-speed feeding and reduced wear.

[0018] This invention, by combining an ion fan and an L-shaped limiting plate on one side of the work flow line, allows thick film resistors that are not placed accurately to vibrate at the L-shaped limiting plate position under the action of the ion fan and be moved into the placement slot of the platform by the wind force. This expands the compatibility of the equipment in terms of the accuracy of material placement and ensures the accuracy of the position of the thick film resistors under high-speed material feeding. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a feeding structure provided in an embodiment of the present invention;

[0020] Figure 2 This is the present invention. Figure 1 An enlarged view of section A of the feeding structure provided in the embodiment;

[0021] Figure 3 This is the present invention. Figure 1 An enlarged view of section B of the feeding structure provided in the embodiment;

[0022] Figure 4 This is a partial structural diagram of a feeding structure provided in an embodiment of the present invention;

[0023] Figure 5 This is the present invention. Figure 4 An enlarged view of section C of a feeding structure provided in the embodiment;

[0024] Figure 6 This is a schematic diagram of the driving component of the feeding structure provided in an embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the overall structure of a feeding device provided in an embodiment of the present invention;

[0026] Figure 8 This is the present invention. Figure 7 An enlarged view of the structure at point D of the feeding device provided in the embodiment;

[0027] Figure 9 This is the present invention. Figure 7 An enlarged view of the feeding structure at point E provided in the embodiment;

[0028] Figure 10 This is a structural schematic diagram of a feeding plate feeding method provided in an embodiment of the present invention;

[0029] Figure 11 This is the present invention. Figure 10 An enlarged view of the structure at point F in a feeding plate feeding method provided in the embodiment;

[0030] Reference numerals: 1. Feeding plate; 2. Feeding flow line; 3. Working flow line; 4. Carrier; 5. Gantry transmission assembly; 6. Mounting frame; 7. Clamp; 8. Hollow pulley; 9. Double-chain spiral conveyor rod assembly; 10. Fixed rod; 11. Guide structure; 12. Drive assembly; 13. Positioning plate; 14. Air pipe; 15. Adsorption head; 16. Pressure plate; 17. L-shaped limit plate; 18. Height limit plate; 19. Second cylinder; 20. Ionizing fan; 21. Horizontal moving module; 22. Movable block; 23. Adjusting plate; 24. Arc-shaped clamping plate; 25. First cylinder. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0032] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances. Example 1

[0034] This invention provides a feeding device for thick-film resistor sheets, which requires the use of a corresponding thick-film resistor sheet handling mechanism. It enables efficient feeding of thick-film resistors without the need for an adsorption structure. The resistors are stably stacked vertically during loading and orderly lowered during unloading. Multiple resistor sheets can be handled simultaneously without repetitive movements, and the printed resistive film is less prone to wear, resulting in good economic benefits. To achieve the device's structural functions, the thick-film resistor sheets must first be fed. The device can include a feeding plate 1 and a workflow 3. The feeding plate 1 is configured for storing... The device stores multiple thick-film resistor sheets awaiting processing or testing. To this end, multiple slots for placing resistor sheets are arranged in an array on the loading plate 1. These slots allow the top-positioned thick-film resistor sheets to be ejected using appropriate material handling structures. Furthermore, for processing or testing, a carrier 4 for transporting the resistor sheets is configured on the workflow 3. Resistor sheets transported from the loading plate 1 should ultimately be placed in their corresponding positions on the carrier 4 for subsequent processing or testing. To achieve efficient loading, the device also includes a loading workflow 2, which is positioned to one side of the workflow 3. Figure 7 and Figure 9As shown, the feeding flow line 2 is used to transport and position the feeding plate 1. Preferably, a double-belt conveyor structure with intervals is adopted, which exposes the perforated groove below the feeding plate 1, allowing the thick-film resistor sheet to be ejected from below. Therefore, a lifting fixture can be provided below the feeding flow line 2. The specific structure of the lifting fixture is not limited here; it is used to push the resistor sheet located in the perforated groove upwards through the feeding flow line 2. The area of ​​the ejection part of the lifting mechanism is set smaller than the surface area of ​​the bottom of the resistor sheet, thus providing more blank space for the thick-film resistor sheet to facilitate gripping. To achieve the flow of the thick-film resistor sheet between the feeding flow line 2 and the working flow line 3, a gripping mechanism is configured. Specifically, the transport structure for the thick-film resistor sheet can be configured with a gantry drive assembly 5 between the loading flow line 2 and the working flow line 3. This assembly can be configured as a multi-axis moving module. The transmission part of the gantry drive assembly 5 is equipped with a mounting frame 6, enabling the gantry drive assembly 5 to drive the mounting frame 6 to rise and fall, and to reciprocate between the loading flow line 2 and the working flow line 3. By configuring corresponding grippers on the mounting frame 6, the lifted thick-film resistor can be transported to the carrier 4 located on the working flow line 3. To avoid wear on the resistive film on the surface of the thick-film resistor sheet, a clamp 7 can be fixedly installed on the mounting frame 6, such as... Figures 1-5As shown, a hollow pulley 8 is rotatably mounted on the clamp 7. A double-chain spiral conveyor rod assembly 9 is fixedly mounted on the lower end face of the hollow pulley 8. This double-chain spiral conveyor rod assembly 9 consists of two centrally symmetrical spiral rods. The two symmetrical spiral rods are concentrically arranged, similar to a spring structure but with a rigid rod design. When these two spiral rods intersect, there will be a certain placement space at the corresponding height section. By storing thick film resistor sheets at different height sections, that is, during transportation, a maximum number of thick film resistor sheets with the corresponding number of spiral turns can be transported at one time (the actual maximum number will be less than the actual number of turns depending on the height configuration). In order to realize this structure for picking up thick film resistor sheets, the diameter of the circle containing the double-chain spiral conveyor rod assembly 9 is larger than the width of the resistor sheet but smaller than the length of the resistor sheet. At the same time, a fixing rod 10 that passes through the hollow pulley 8 is fixedly mounted on the mounting bracket 6. A guide structure 11 is fixedly mounted on the lower end of the fixing rod 10. This guide structure 11 is used to prevent the stored resistor sheets from being guided along the spiral line. The material slides downwards, thus losing stable storage performance. Furthermore, the mounting frame 6 is equipped with a drive assembly 12 (a belt pulley drive assembly) to drive the hollow pulley 8. When the drive assembly 12 drives the hollow pulley 8 to rotate, it drives the double-chain spiral conveyor rod assembly 9 to rotate. After the thick-film resistor sheet is conveyed to the bottom position of the double-chain spiral conveyor rod assembly 9, the assembly descends until the lowest points of the two symmetrical spiral rods are below the thick-film resistor sheet. At this point, the two lowest points are located on either side of the two long sides of the thick-film resistor sheet. When the double-chain spiral conveyor rod assembly 9 starts to rotate, the lowest points of the two spiral rods insert into the bottom of the thick-film resistor sheet, using its spiral structure to provide upward transmission power for the thick-film resistor sheet. The guide structure 11 at this time is used to prevent the resistor sheet located in the middle of the spiral interlayer of the double-chain spiral conveyor rod assembly 9 from deflecting, that is, the thick-film resistor sheet cannot slide downwards through the spiral guidance. It rises stably under the drive of the double-chain spiral conveyor rod assembly 9. The structure of the stored resistor sheet can be referred to... Figure 6As shown, by continuously stacking at different heights, the gripper can simultaneously grab multiple resistor sheets. The same applies when unloading; it is only necessary to control the hollow pulley 8 to rotate in the opposite direction. It is important to note that if the diameter of the circle containing the double-chain spiral conveyor assembly 9 is not greater than the width of the resistor sheet, the gap in the double-chain spiral conveyor assembly 9 cannot accommodate the thick-film resistor sheet (the space is too small). If the diameter of the circle is not less than the length of the resistor sheet, the thick-film resistor sheet lacks a stable support point in the double-chain spiral conveyor assembly 9, which can easily cause it to fall directly from the central gap. If the double-chain spiral conveyor assembly 9 uses a single spiral structure, the stored thick-film resistor sheet lacks a support point of equal height on the other side, making it prone to tilting and leaking out of the gap. Furthermore, because there is uneven force on only one side during upward guidance, it can easily increase the stress on that point. Under the constraint of the guide structure 11, this can easily increase local stress and cause damage. Therefore, a double spiral structure is preferred to ensure stable storage performance while maintaining the maximum storage gap. If the area of ​​the top section is larger than the thick-film resistor sheet, the double-chain spiral conveyor assembly 9 cannot position the thick-film resistor sheet at the bottom support position. Therefore, the design of the top section must meet the usage requirements.

[0035] In the above embodiments, to further improve the efficiency of the handling operation, it can be done as follows: Figure 7 The loading flow line 2 shown can be driven away from or closer to the working flow line 3. At this time, the position of the lifting mechanism does not need to be changed. The loading plate 1 itself can move horizontally along the X and Y axes (undefined in the figure, but can be understood as movement within a plane). The open slot on the loading plate 1 is actively moved to the lifting part of the lifting mechanism. The lifting mechanism only needs to be raised and lowered as needed. The double-chain spiral conveyor rod assembly 9 can also match the position of the lifting part. During operation, the lifting mechanism pushes out the thick-film resistor sheet, and the double-chain spiral conveyor rod assembly 9 lowers first. The material is lowered to the picking position and rotated 180 degrees. After the thick film resistor sheet enters the thread gap of the double-chain spiral conveyor assembly 9, the double-chain spiral conveyor assembly 9 moves upward. At the same time, the lifting part moves downward until it is below the loading plate 1. Then, the entire loading flow line 2 moves horizontally (including in the X and Y directions) until another hollow slot moves to the position to be lifted. The lifting mechanism then lifts again and the double-chain spiral conveyor assembly 9 descends again. This method does not require changing the picking position, and the mutual cooperation between the mechanisms has higher efficiency and makes picking more convenient. In some preferred embodiments, in order to avoid relative offset between the loading plate 1 and the loading flow line 2, the loading plate 1 can be equipped with a corresponding positioning structure that can be relatively fixed with the conveying part on the loading flow line 2, such as by using the suction holes on the conveyor belt, the positioning hole insertion method, and so on. Figure 9The method of the corrugated conveyor belt fitting into the edge of the feeding plate 1 is shown, and other specific forms are not limited here. This is to avoid the relative positional shift between the feeding flow line 2 and the feeding plate 1 after the flow line 2 moves, which would cause the camera to spend a lot of time on re-inspection.

[0036] This invention provides a feeding device for a thick-film resistor sheet, specifically offering a configuration of a guide structure 11 and a positioning method for the thick-film resistor sheet. The resistor sheet includes a substrate and a thick-film resistor disposed on the substrate. The substrate, serving as a base, can accept stress amplification and provide a more stable support surface for material handling. To achieve precise positioning and material handling, at least two positioning holes are provided on the substrate. The guide structure 11 is configured as a positioning rod that can be inserted into the positioning holes, and the carrier 4 has positioning holes that match the positioning rods. With this design, the thick-film resistor sheet will not deflect and will only rise stably along the direction of the positioning rods. The stress applied to both sides of the double-chain spiral conveyor rod assembly 9 is evenly applied to both sides of the substrate, allowing the substrate to rise and fall stably. Subsequent positioning is then matched according to the position of the positioning rods.

[0037] This invention provides a feeding device for thick-film resistor sheets. To prevent the lifting mechanism from shifting during the lifting of the thick-film resistor sheet, a stable lifting mechanism is specifically provided, as described in the following embodiment. Figure 9 , Figure 10 as well as Figure 11As shown, the lifting mechanism includes a positioning plate 13 located below the loading flow line 2. An air pipe 14 is slidably mounted vertically on the positioning plate 13, and a suction head 15 is mounted at the top of the air pipe 14. The air pipe 14 and the suction head 15 can be driven to rise and fall by a first cylinder 25 located on one side of the positioning plate 13 (a corresponding limiting structure can be used to limit the driving distance to ensure accurate driving position; the specific structural configuration is not elaborated here). When lifting the thick-film resistor sheet, the suction head 15 first stably adsorbs the substrate of the thick-film resistor sheet onto the suction head 15, so that after the thick-film resistor sheet is pushed out of the loading plate 1, the position of the thick-film resistor sheet will not shift relative to the loading plate 1. At this time, the positioning rod descends... The thick-film resistor sheet can be accurately inserted into the positioning hole on the substrate. It is important to note that once the thick-film resistor sheet detaches from the adsorption head 15, the air tube 14 needs to lower the adsorption head 15 or the double-chain spiral conveyor rod assembly 9 needs to rise promptly to avoid collision between the double-chain spiral conveyor rod assembly 9 and the adsorption head 15. For this purpose, a negative pressure sensor can be connected to the air tube 14 to monitor the adsorption status on the substrate. In some other preferred embodiments, the adsorption head 15 can be configured as a cylinder and positioned at the center of the double-chain spiral conveyor rod assembly 9. In this case, the top adsorption surface is circular. By configuring appropriate dimensions, the double-chain spiral conveyor rod assembly 9 will not collide with the adsorption head 15 regardless of its movement, resulting in better operational safety. For the square columnar adsorption head 15, preferably, the length and width of the adsorption head 15 are smaller than the length and width of the substrate, respectively. The adsorption head 15 includes an adsorption block connected to the air tube 14 and multiple air slits on the top of the adsorption block. The air slits are used for adsorption to avoid excessive negative pressure and provide sufficient adsorption surface. By providing an elastic layer above the adsorption block to increase friction, further displacement of the thick-film resistor sheet can be effectively prevented.

[0038] The present invention provides a feeding device for a thick-film resistor sheet. Considering that the positioning rod guidance method may not meet the positioning accuracy requirements for some special resistor sheets, or the positioning time may be too long, affecting the sheet handling efficiency, in addition to configuring the resistor sheet including a substrate and a thick-film resistor disposed on the substrate, a guide structure 11 can be configured including two mutually parallel limiting plates, and the distance between the two limiting plates is greater than the width of the substrate. By directly using the two limiting plates for limiting, it can be directly placed on the side of the picking position, and the thick-film resistor sheet can be prevented from tilting downwards by self-turning without precise positioning. When using this method, the placement stability of the thick-film resistor sheet will decrease, so it is necessary to select it according to the actual application requirements of the resistor sheet.

[0039] This invention provides a feeding device for thick-film resistor sheets. To protect the double-chain spiral conveyor rod assembly 9 and prevent deformation of the fragile assembly from collisions, two symmetrical arc-shaped clamping plates 24 are provided below the clamping hoop 7, covering the outer side of the double-chain spiral conveyor rod assembly 9. The width of the space between the two arc-shaped clamping plates 24 is greater than the width of the resistor sheet to ensure that it meets the storage requirements of the thick-film resistor sheet. In addition, the diameter of the circle containing the arc-shaped clamping plate 24 can be configured to be smaller than the length of the resistor sheet, so that the arc-shaped clamping plate 24 itself has a certain restraining ability on the thick-film resistor sheet, preventing it from deflecting and falling. Example 2

[0040] This invention provides a feeding device for thick-film resistor sheets, which differs from Embodiment 1 in that it provides a convenient method for placing the thick-film resistor sheets to simplify the feeding process and save feeding time. Specifically, a pressure plate 16, driven and lifted by a second cylinder 19, is provided above the work flow line 3, and an L-shaped limiting plate 17 is provided below the pressure plate 16. Figure 8 As shown, the corner of the L-shaped limiting plate 17 can coincide with the corner of the placement slot on the carrier 4 through a descent action. When using the material handling device of Embodiment 1 for material feeding, it can be directly placed on the side of the slot opening of the carrier 4 without precise placement. This avoids the need for secondary precise positioning during placement. However, since it cannot be used directly after being placed on the side, an ion fan 20 is required on one side of the work flow line 3 to blow towards the corner of the L-shaped limiting plate 17. Through the cooperation of the ion fan 20 and the L-shaped limiting plate 17, the ion fan 20 can remove dust and static electricity from the thick film resistor sheet, while allowing the thick film resistor sheet placed at the edge of the slot opening of the carrier 4 to vibrate and shift against the corner of the L-shaped limiting plate 17, and fall into the slot during the shift. That is, this structure simultaneously achieves the positioning, static electricity removal, and dust removal of the thick film resistor sheet. To prevent the wind force of the L-shaped limiting plate 17 from being too strong and blowing the thick film resistor sheet directly against the edge of the L-shaped limiting plate 17, the following can be done: Figure 8 As shown, a height limiting plate 18 is provided below the angle of the L-shaped limiting plate 17 to ensure that the thick film resistor sheet vibrates and deviates within a narrow range. At the same time, ventilation slots are provided on both the L-shaped limiting plate 17 and the height limiting plate 18 to reduce the excessive wind resistance caused by the return air, which would affect the wind force acting on the L-shaped limiting plate 17.

[0041] The thick film resistor feeding device provided in this embodiment of the invention, in order to further optimize the handling efficiency, can be configured with at least two sets of gantry transmission components 5 along the conveying direction of the working flow line 3. When one set of double-chain spiral conveyor rods 9 is feeding, the other set of double-chain spiral conveyor rods 9 can perform the unloading action. Through alternating actions, there is no waiting time, which has better working efficiency. In order to facilitate the L-shaped limit plate 17 to match different unloading positions for blocking, a horizontal moving module 21 parallel to the conveying direction of the working flow line 3 is provided on the working flow line 3. By configuring a movable block 22 on the horizontal moving module 21, and installing the second cylinder 19 and the ion fan 20 on the movable block 22, the second cylinder 19 and the ion fan 20 can move with the flow line direction to match the unloading position. Without the height limit plate 18, the L-shaped limit plate 17 can be directly used as a guide edge for placing the thick film resistor, thus avoiding the thick film resistor being directly damaged by the L-shaped limit plate 17 when it is pressed down due to inaccurate placement of the thick film resistor.

[0042] In some preferred embodiments of the thick-film resistor feeding device provided by this invention, in order to facilitate the adjustment of the angle and strength of the wind force, an adjustment plate 23 can be installed on the movable block 22. An ion fan 20 can be configured to rotate and be mounted on the adjustment plate 23, while being relatively fixed with the adjustment plate 23. By adjusting the angle of the wind force and matching the angle of the L-shaped limiting plate 17, it can achieve optimal efficiency. However, if the wind force is too strong and causes poor amplitude of the thick-film resistor, the amplitude of the thick-film resistor can be improved by fine adjustment to avoid damage to the thick-film resistor caused by excessive amplitude and frequency.

[0043] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A transport structure for a thick-film resistor sheet, comprising a thick-film resistor sheet mounted on a substrate, characterized in that, It also includes a mounting frame (6), on which a clamp (7) is fixedly mounted, and a hollow pulley (8) is rotatably mounted on the clamp (7). A double-chain spiral conveying rod assembly (9) is fixedly mounted on the lower end face of the hollow pulley (8). The double-chain spiral conveying rod assembly (9) is composed of two centrally symmetrical spiral rods. The diameter of the circle containing the double-chain spiral conveying rod assembly (9) is greater than the width of the substrate and less than the length of the substrate. A fixing rod (10) penetrating the hollow pulley (8) is also fixedly mounted on the mounting frame (6). A guide structure (11) is fixedly mounted at the lower end of the fixing rod (10) to prevent the resistor sheet located in the middle of the spiral interlayer of the double-chain spiral conveying rod assembly (9) from deflecting. A drive assembly (12) for driving the hollow pulley (8) to rotate is provided on the mounting frame (6). The guide structure (11) includes two parallel limiting plates, the distance between the two limiting plates being greater than the width of the substrate; or, the substrate is provided with not less than two positioning holes, and the guide structure (11) is a positioning rod that can be inserted into the positioning hole, and the number of positioning rods is not less than two.

2. The transport structure for a thick-film resistor sheet according to claim 1, characterized in that, Below the clamp (7) are two symmetrical arc-shaped clamps (24) covering the outside of the double-chain spiral conveyor rod assembly (9). The width of the space left between the two arc-shaped clamps (24) is greater than the width of the base plate, and the diameter of the circle containing the arc-shaped clamps (24) is less than the length of the base plate.

3. A feeding device for thick-film resistor sheets, characterized in that, The system includes a loading plate (1) and a working flow line (3). The loading plate (1) is provided with a plurality of hollow slots for placing resistor sheets in an array. The working flow line (3) is provided with a carrier (4) for conveying resistor sheets. The system also includes a thick film resistor sheet handling mechanism as described in any one of claims 1-2. A loading flow line (2) is provided on one side of the working flow line (3). The loading flow line (2) is used to position and convey the loading plate (1). A lifting mechanism is provided below the loading flow line (2) for lifting the substrate located in the hollow slots upward. A gantry drive assembly (5) is provided between the loading flow line (2) and the working flow line (3). The mounting frame (6) is fixedly mounted on the moving end of the gantry drive assembly (5).

4. The feeding device for a thick-film resistor sheet according to claim 3, characterized in that, The lifting mechanism includes a positioning plate (13) located below the feeding flow line (2). An air pipe (14) is slidably arranged on the positioning plate (13) in the vertical direction. An adsorption head (15) is provided at the top of the air pipe (14). A first cylinder (25) for driving the air pipe (14) to rise and fall is also provided on one side of the positioning plate (13). A negative pressure sensor is connected to the air pipe (14).

5. The feeding device for a thick-film resistor sheet according to claim 4, characterized in that, The structure of the adsorption head (15) is cylindrical and the outer diameter of the adsorption head (15) is smaller than the width of the substrate; or, the adsorption head (15) is rectangular and its length and width are smaller than the length and width of the substrate, respectively. The adsorption head (15) includes an adsorption block connected to the air tube (14) and a plurality of air slits provided on the top of the adsorption block. An elastic layer is provided above the adsorption block.

6. A feeding device for thick-film resistors according to any one of claims 3-5, characterized in that, Above the work flow line (3) is a pressure plate (16) that is driven to rise and fall by a second cylinder (19). Below the pressure plate (16) is an L-shaped limiting plate (17). The corner of the L-shaped limiting plate (17) can coincide with the corner of the placement slot on the carrier (4) through the descent action. On one side of the work flow line (3) is an ion fan (20) that blows towards the corner of the L-shaped limiting plate (17).

7. The feeding device for a thick-film resistor sheet according to claim 6, characterized in that, A height limit plate (18) is provided below the angle of the L-shaped limiting plate (17), and ventilation slots are provided on both the L-shaped limiting plate (17) and the height limit plate (18).

8. The feeding device for a thick-film resistor sheet according to claim 6, characterized in that, The gantry transmission assembly (5) is provided with at least two sets along the conveying direction of the working flow line (3). The working flow line (3) is provided with a horizontal moving module (21) parallel to the conveying direction of the working flow line (3). The horizontal moving module (21) is equipped with a movable block (22). The second cylinder (19) and the ion fan (20) are both installed on the movable block (22).

9. The feeding device for a thick-film resistor sheet according to claim 8, characterized in that, An adjustment plate (23) is installed on the movable block (22), and the ion fan (20) is rotatably mounted on the adjustment plate (23) and can be relatively fixed with the adjustment plate (23).

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