Plate clamping device, conveying mechanism and plate clamping system

Abstract

The present invention provides a plate clamping device, a conveying mechanism and a plate clamping system. The plate clamping device includes an upper clamp, a sliding rod and a lower clamp. The conveying mechanism includes a plate clamping device, and the plate clamping system includes a conveying mechanism. The plate clamping device clamps the upper and lower parts of the plate by the upper clamp and the lower clamp, so that the thin plate can maintain a good verticality, avoid shaking or swinging of the front end face of the thin plate during the conveying process, and prevent the thin plate from getting stuck during the conveying process; at the same time, since the upper clamp and the lower clamp move synchronously, the deformation of the thin plate caused by the asynchronous movement of the upper clamp and the lower clamp can be prevented, and the plate quality is high; the edges on the left and right sides of the thin plate can be overlapped on the sliding rod, and the sliding rod supports the edges on the left and right sides of the plate, which can further prevent the front and rear ends of the thin plate from shaking or swinging during the conveying process, and avoid the phenomenon of getting stuck.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board processing, and in particular to a plate clamping device, a conveying mechanism and a plate clamping system. Background Art

[0002] The production of circuit boards requires process steps such as electroplating and etching. For example, during the electroplating process, the circuit boards are transported into the plating tank for electroplating through a conveying mechanism. A clamp is provided at the lower end of the conveyor belt of the conveying mechanism. The clamp is used to clamp the circuit boards on the conveyor belt of the conveying mechanism to realize the transportation of the circuit boards.

[0003] During the electroplating process, it is often necessary to plate circuit boards of different thicknesses. When the circuit board is a thin plate, its verticality is not high. The thin plate is only clamped by the upper clamp. During the transportation process, the front end surface of the thin plate is prone to shaking and swinging, and it cannot smoothly enter the gap between the subsequent two water-retaining rollers or guide rollers, resulting in board jamming during the transportation of the circuit board. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the front end surface of the thin plate is prone to shaking or swinging during the transportation process, thereby causing the plate to be stuck.

[0005] To this end, the present invention provides a plate clamping device, comprising

[0006] An upper clamp, used for connecting to a conveyor belt;

[0007] A slide bar is slidably connected to an adjusting fixture, wherein the adjusting fixture is suitable for being connected to a conveyor belt;

[0008] A lower clamp is provided at the bottom end of the slide bar.

[0009] Optionally, in the above-mentioned plate clamping device, the adjusting fixture is provided with a sliding cavity, and the sliding rod is inserted into the sliding cavity.

[0010] Optionally, the above-mentioned plate clamping device further includes an anti-rotation structure, and the anti-rotation structure includes:

[0011] A first plane is arranged on a side wall of the slide bar;

[0012] A second plane is provided on the inner side wall of the sliding cavity of the adjusting fixture;

[0013] When the sliding rod slides in the sliding cavity of the adjusting fixture, the first plane and the second plane are relatively matched.

[0014] The present invention provides a conveying mechanism, comprising any one of the plate clamping devices described above,

[0015] and conveyor belts;

[0016] A plurality of adjustment clamps fixedly connected to the conveyor belt;

[0017] A plurality of upper clamps are fixedly connected to the conveyor belt.

[0018] Optionally, in the above-mentioned conveying mechanism, the adjusting clamp and the upper clamp are fixed to the bottom end of the conveying belt.

[0019] The present invention provides a plate clamping system, comprising the above-mentioned conveying mechanism, and further comprising:

[0020] A lifting mechanism is arranged below the slide bar along the direction of the conveyor belt and has a lifting platform that can slide up and down and is used to lift the slide bar;

[0021] The clamping mechanism is arranged on the side of the slide bar along the direction of the conveyor belt and has a clamping plate for opening and closing the clamp.

[0022] Optionally, the above-mentioned plate clamping system further includes:

[0023] The pull-down mechanism is slidably arranged on one side of the slide rod along the direction of the conveyor belt.

[0024] Optionally, in the above-mentioned sheet material clamping system, the pull-down mechanism is provided with a grabbing component, and the middle portion of the grabbing component is concave to form an accommodating area for accommodating the sliding rod.

[0025] Optionally, in the above-mentioned plate clamping system, the inner diameter of the accommodating area is smaller than the width of the lower clamp at the bottom end of the sliding rod.

[0026] Optionally, in the above-mentioned plate clamping system, the lifting platform is provided with a groove for positioning the lower clamp.

[0027] The technical solution of the present invention has the following advantages:

[0028] 1. The plate clamping device provided by the present invention comprises an upper clamp, a slide bar and a lower clamp. The adjusting clamp and the upper clamp are suitable for being fixedly connected to the conveyor belt, the slide bar is slidably connected to the adjusting clamp, and the bottom end of the slide bar is provided with a lower clamp.

[0029] The plate clamping device of this structure clamps the upper front end of the plate by the upper clamp and the lower front end of the plate by the lower clamp, and clamps the upper front end and the lower front end of the plate simultaneously during the plate conveying process, which can keep the plate in good verticality, prevent the front end face (the side of the plate facing forward along the plate conveying direction) of the thin plate from shaking or swinging during the conveying process, and prevent the thin plate from getting stuck during the conveying process. At the same time, because the lower clamp is fixed to the bottom of the slide bar, the slide bar is suitable for being fixed on the conveyor belt by adjusting the clamp, and the slide bar drives the lower clamp and the upper clamp to move synchronously, which can prevent the thin plate from deforming and the plate quality is high. At the same time, the edges of the left and right sides of the thin plate can be overlapped on the slide bar, and the slide bar supports the edges of the left and right sides of the plate, which can further prevent the front and rear ends of the thin plate from shaking or swinging during the conveying process, and avoid the phenomenon of getting stuck.

[0030] 2. The conveying mechanism provided by the present invention includes a plate clamping device, a conveyor belt, a plurality of adjustment clamps and a plurality of upper clamps. In the conveying mechanism of this structure, the upper part of each plate is clamped by the upper clamp, and the lower part is clamped by the lower clamp, so that the thin plate maintains a good verticality from top to bottom, avoiding the thin plate from getting stuck during the conveying process, and allowing the thin plate to smoothly enter the gap between the two water-blocking rollers or guide rollers in the subsequent process. At the same time, the left and right edges of the plate are overlapped on the sliding rod, and the sliding rod supports the left and right edges of the plate, which can further prevent the front and rear ends of the thin plate from shaking or swinging during the conveying process, avoiding the phenomenon of getting stuck.

[0031] 3. The plate clamping system provided by the present invention comprises a conveying mechanism, a positioning device and a clamping mechanism. The positioning device comprises a lifting mechanism, a pull-down mechanism and a control mechanism. The lifting mechanism is arranged directly below the slide bar and the lower clamp along the conveying direction of the steel strip, and the pull-down mechanism is arranged on one side of the slide bar along the conveying direction of the steel strip.

[0032] The plate clamping system of this structure includes a conveying mechanism, which can ensure the verticality of the thin plate during the conveying process and effectively prevent the plate from getting stuck during the conveying process. At the same time, the positioning device of the plate clamping system of this structure can control the first driver to drive the lifting platform to the uniform height required by the lower clamp through PLC control according to the uniform height required by the lower clamp. The lower clamp is fixed at the bottom of the slide bar. When the height of the lower clamp needs to be adjusted, the slide bar is released, and the lower clamp moves downward with the slide bar. The lower clamp stops moving when it drops to the upper surface of the contact lifting platform, and the uniform adjustment of the height of the lower clamp can be automatically achieved. The operation is simple, convenient, and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 The figure is a schematic diagram of the three-dimensional structure of an adjusting fixture provided in one embodiment of the present invention.

[0035] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure from a second angle.

[0036] Figure 3 for Figure 1 A schematic diagram of the three-dimensional structure from another angle.

[0037] Figure 4 It is a schematic diagram of the three-dimensional structure of an adjustment fixture provided in another embodiment of the present invention.

[0038] Figure 5 for Figure 4 A schematic diagram of the three-dimensional structure of the adjusting fixture from another angle.

[0039] Figure 6 A side view of an adjustment fixture provided in another embodiment of the present invention.

[0040] Figure 7 for Figure 6 main view.

[0041] Figure 8 Schematic diagram of a conveying mechanism in one embodiment of the present invention.

[0042] Fig. 9 It is a schematic diagram of a conveying mechanism in another embodiment of the present invention.

[0043] Fig.10 A top view of a lifting mechanism in a plate clamping system;

[0044] Fig.11 It is a front view of the lifting mechanism in the plate clamping system;

[0045] Fig.12 It is a right side view of the lifting mechanism in the plate clamping system;

[0046] Fig.13 A top view of a pull-down mechanism in a plate clamping system;

[0047] Fig.14 It is a front view of the pull-down mechanism in the plate clamping system;

[0048] Fig.15 It is a right side view of the pull-down mechanism in the plate clamping system;

[0049] Fig.16 Right side view of the sheet metal clamping system.

[0050] Fig.17 It is a side view schematic diagram of the clamp opening mechanism.

[0051] Description of reference numerals:

[0052] a1-fixed clamp; a11-first clamping surface; a12-sliding cavity; a121-second plane; a2-movable clamp; a21-second clamping surface; a22-boss; a3-rotating shaft; a4-elastic member; a5-limiting platform; a6-steel belt; a7-adjusting fixture; a8-upper fixture;

[0053] 1-lifting mechanism; 11-lifting platform; 12-first cylinder; 13-fixed seat; 14-supporting wheel; 15-rotating shaft;

[0054] 2-pull-down mechanism; 211-second stepping motor; 212-second lead screw; 213-second slider; 214-second fixing plate;

[0055] 22-second cylinder; 23-grasping component; 24-grasping frame; 241-upper plate; 242-lower plate; 243-side plate;

[0056] 251-fourth stepping motor; 252-fourth lead screw; 253-fourth slider;

[0057] 261-guide rod; 262-third slider; 263-fixed bracket; 264-connected bearing; 265-fifth slider; 266-slide rail; 267-fixed plate;

[0058] 3-slide bar; 4-lower clamp;

[0059] 5- Splint. DETAILED DESCRIPTION

[0060] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0062] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0064] Example 1

[0065] This embodiment provides a plate clamping device, such as Figure 8 As shown, it includes an upper clamp a8, a slide bar 3 and a lower clamp 4.

[0066] Among them, the adjusting clamp a7 and the upper clamp a8 are suitable for being fixedly connected to the conveyor belt, the slide bar 3 is connected to the adjusting clamp a7 slidably up and down, and the lower clamp 4 is provided at the bottom end of the slide bar.

[0067] The plate clamping device of this structure clamps the upper front end of the plate through the upper clamp a8 and clamps the lower front end of the plate, and clamps the upper front end and the lower front end of the plate simultaneously during the plate conveying process, so that the plate can maintain a good verticality, avoid the front end surface (the side of the plate in the front of the plate conveying direction) of the thin plate from shaking or swinging during the conveying process, and prevent the thin plate from getting stuck during the conveying process. At the same time, because the lower clamp is fixed to the bottom of the slide bar, the slide bar is suitable for being fixed on the conveyor belt through the adjustment clamp a7, and the slide bar drives the lower clamp and the upper clamp a8 to move synchronously, which can prevent the thin plate from deformation and the plate quality is high.

[0068] At the same time, the left and right edges of the thin plate can be overlapped on the sliding rod, and the sliding rod supports the left and right edges of the thin plate, which can further prevent the front and rear ends of the thin plate from shaking or swinging during transportation, thereby avoiding the phenomenon of plate jamming.

[0069] Specifically, Figure 1 As shown, the adjusting fixture a7 is provided with a sliding cavity a12, and the sliding rod is arranged in the sliding cavity a12. When the adjusting fixture a7 is opened, the sliding rod can slide in the sliding cavity a12. The sheet clamping device can adjust the length of the sliding rod according to the length of different sheets to adapt to the clamping of sheets of different lengths without frequent replacement. The sheet clamping device has a wide range of applications and saves costs.

[0070] The diameter of the lower section of the slide rod 3 is larger than that of the upper section, and a limit platform a5 is formed at the transition point of the diameter of the slide rod. The cross section of the limit platform a5 is larger than the cross section of the sliding cavity a12, preventing the slide rod from being pulled out from the upper part of the adjustment fixture a7.

[0071] Specifically, Figure 1 As shown, the adjustment clamp includes a fixed clamp a1 and a movable clamp a2, the fixed clamp a1 and the movable clamp a2 are rotatably connected via a rotating shaft a3, an elastic member a4 is provided between the fixed clamp a1 and the movable clamp a2, and the elastic member can be a spring. Under the action of the elastic member, the fixed clamp a1 and the movable clamp a2 have a biasing force to keep the two clamping surfaces close to each other. A sliding cavity a12 is provided in the fixed clamp a1, and the sliding cavity a12 is used for the sliding rod 3 to pass through.

[0072] like Figure 4 As shown, the plane in the sliding cavity is the second plane a121, and correspondingly, a first plane is also provided on the upper side wall of the sliding rod, and when the sliding rod slides in the sliding cavity of the adjusting fixture, the first plane and the second plane a121 are relatively matched, so that the sliding rod cannot rotate around the axial direction.

[0073] like Figure 2 As shown, the fixed clamp a1 has a first clamping surface a11, which is arranged on a side surface of one end of the sliding cavity a12. The movable clamp a2 has a second clamping surface a21 opposite to the first clamping surface a11, which is arranged on the top of the outwardly extending boss a22. By pressing one end of the elastic member a4 of the fixed clamp a1 and the movable clamp a2, the distance between the second clamping surface and the first clamping surface a11 can be adjusted.

[0074] like Figure 3 As shown, the sliding cavity a12 of the fixed clamp a1 is suitable for allowing the object to be clamped to pass through, and then the distance between the second clamping surface a21 and the first clamping surface a11 is adjusted so that the second clamping surface a21 can be pressed against the upper surface of the object to be clamped, and the object to be clamped is clamped between the first clamping surface a11 and the second clamping surface a21. At the same time, the object to be clamped is limited in the sliding cavity a12, and the limitation of the sliding cavity a12 also plays a clamping role, which increases the clamping area and clamping force, effectively prevents the object to be clamped from shaking relative to the adjusting clamp, and makes the clamped object more stable.

[0075] Specifically, Figure 2 and Figure 3 As shown, the first clamping surface a11 is located on the inner wall surface of one end of the sliding cavity a12, and an opening is provided on the side wall of the fixed clamp a1 opposite to the first clamping surface a11; the movable clamp a2 is provided with a boss a22 extending outward. The boss a22 is vertically arranged at the end of the movable clamp a2. The boss a22 is opposite to the first clamping surface a11 and is suitable for extending into the opening, and the second clamping surface a21 is arranged on the top surface of the boss a22. The opening is arranged to facilitate the boss a22 to extend out and extend into the sliding cavity a12 when the adjustment clamp is opened and closed. In addition, as shown in Figure 6 and Figure 7 As shown, the boss a22 can also be obliquely set on the second end of the movable clamp a2, and the boss a22 smoothly transitions from the second end toward the second clamping surface a21. The boss a22 of this structure has high mechanical strength. When the adjusting clamp is fixed vertically downward on the steel belt a6, the liquid splashes onto the adjusting clamp, and the smooth outer surface of the boss a22 facilitates the liquid to slide downward along the surface of the boss a22, thereby ensuring the cleanliness of the adjusting clamp.

[0076] like Figure 1 , Figure 2 and Figure 3 As shown, the first clamping surface a11 is a plane, and the second clamping surface a21 is a plane. Correspondingly, the lower wall of the sliding cavity a12 away from the movable clamp a2 is a plane, and the upper wall close to the movable clamp a2 is also a plane. The first clamping surface a11 and the second clamping surface a21 cooperate with the sliding cavity a12 to achieve clamping, fixing and limiting of the clamped object. The remaining side wall of the sliding cavity a12 can be a plane or a curved surface. In addition, as an alternative embodiment, as Figure 4 and Figure 5 As shown, the lower wall of the sliding cavity a12 is a plane, and the upper wall is an arc surface, and the second clamping surface a21 is concave and arc surface accordingly; the first clamping surface a11 is a plane. In this way, the sliding cavity a12 has at least one plane, which can position the sliding rod 3 passing through the interior and prevent the sliding rod 3 from rotating along the axial direction.

[0077] In addition, the shape of the inner wall surface of the sliding cavity a12 can also be any other shape, for example, the number of its inner wall surfaces can be three, four, five, six, etc., all of the inner wall surfaces can be planes, or all of them can be arc surfaces or other shapes, or a combination of planes and arc surfaces; or the inner wall surface of the sliding cavity a12 can be a complete arc surface or other shapes, as long as the inner wall surface of the sliding cavity a12 matches the shape of the outer wall surface with the clamp to limit and clamp the clamp to a certain extent. The first clamping surface a11 can also be any shape outside the plane, and the second clamping surface a21 can be any shape outside the plane and the arc surface, as long as the first clamping surface a11 and the second clamping surface a21 match the shape of the outer surface of the clamp, the clamp can be stably clamped between the first clamping surface a11 and the second clamping surface a21.

[0078] Specifically, Figure 1 As shown, the middle parts of the fixed clamp a1 and the movable clamp a2 are respectively provided with a first connecting part and a second connecting part, and the rotating shaft a3 passes through the first connecting part and the second connecting part to make the fixed clamp a1 and the movable clamp a2 form a rotational connection; the adjustment clamp also includes an elastic member a4 arranged between the fixed clamp a1 and the movable clamp a2, for example, the elastic member is a spring, and the elastic member a4 is arranged on the end of the movable clamp a2 opposite to the second clamping surface a21. For the convenience of expression, this end of the movable clamp a2 is called the first end of the movable clamp a2, and the end where the boss a22 is located is the second end. The two ends of the elastic member a4 are respectively fixed on the fixed clamp a1 and the movable clamp a2, and the elastic member a4 keeps the first clamping surface a11 and the second clamping surface a21 close to each other with a biasing force.

[0079] When the adjustment clamp needs to be opened, the first end of the movable clamp a2 is pressed, and the distance between the second clamping surface a21 and the first clamping surface a11 increases, and the second clamping surface a21 is separated from the surface of the clamped object, and the clamped object can slide out or be pulled out from the sliding cavity a12. The gap between the inner surface of the sliding cavity a12 and the outer surface of the clamped object can ensure that the clamped object can be pulled out of the sliding cavity a12, so as to limit and clamp the clamped object, prevent the gap from being too large, and prevent the clamped object from shaking in the sliding cavity a12, and stabilize the clamping. Stop pressing the first end, and the elastic member a4 will automatically return the second clamping surface a21 to its original position.

[0080] Example 2

[0081] This embodiment provides a conveying mechanism, such as Figure 8 As shown, it includes multiple plate clamping devices in embodiment 1 and also includes: a conveyor belt.

[0082] Specifically, the conveyor belt is a steel belt a6, the adjusting clamp a7 is fixed on the steel belt a6 of the conveying mechanism, the slide bar 3 is inserted in the slide cavity a12, the upper clamp a8 is fixed on the bottom of the steel belt a6, the lower clamp 4 is fixed on the bottom of the slide bar 3, and the circuit board is clamped and fixed on the steel belt a6 by the upper clamp a8 and the lower clamp 4. Pressing the first end of the movable clamp a2 can slide the slide bar 3, thereby adjusting the distance between the lower clamp 4 at the bottom end of the slide bar 3 and the upper clamp a8 to achieve the clamping of circuit boards of different lengths.

[0083] The shape of the outer wall of the slide bar 3 matches the shape of the inner wall of the sliding cavity a12. At this time, the slide bar 3 has a first surface that matches the second clamping surface a21, and also has a second surface that matches the first clamping surface a11. According to the specific structure of the sliding cavity a12, the first surface can be a plane or a curved surface, and the second surface can be a plane. The slide bar 3 can prevent the slide bar 3 from rotating in the sliding cavity a12 by matching with the sliding cavity a12, which plays a limiting role. In addition, the slide bar 3 can be fixed firmly and reliably through the sliding cavity a12. The setting of the curved surface facilitates the slide bar 3 to slide in the sliding cavity a12 to adjust the length of the slide bar 3.

[0084] like Figure 8 As shown, three upper clamps a8 can be provided between two adjacent slide bars on the steel belt, and the three upper clamps a8 are used to clamp the front end, middle end and rear end of the upper part of each thin plate, respectively, so that the upper part of the thin plate maintains good smoothness. The front end and rear end of the lower part of each thin plate are clamped by the lower clamp 4, so that the lower part of the thin plate maintains good smoothness, so that the upper and lower parts of the thin plate maintain good verticality as a whole, avoiding the thin plate from getting stuck during the transportation process, so that the thin plate can smoothly enter the gap between the two water-blocking rollers or guide rollers in the subsequent process. At the same time, the edges on the left and right sides of the thin plate are overlapped on the slide bar 3, and the slide bar 3 supports the edges on the left and right sides of the thin plate, which can further prevent the front and rear ends of the thin plate from shaking or swinging during the transportation process, avoiding the phenomenon of getting stuck.

[0085] In addition, as an alternative embodiment, different numbers of upper clamps a8 can be set according to the width of the thin plate. For example, when the number of upper clamps a8 on the conveyor belt between two adjacent slide bars 3 is one, the upper clamp a8 is clamped at the front end of the upper part of the thin plate, and the lower clamp 4 is clamped at the front end of the lower part of the thin plate, which can maintain the verticality of the front end face of the thin plate, so that the front end face can smoothly enter the gap between the two water-blocking rollers or guide rollers, and the rear part of the front end face of the thin plate can enter the gap between the water-blocking rollers or guide rollers under the guidance of its front end face. When the thin plate is wider, more than three upper clamps a8 can be set between each two adjacent slide bars 3 to prevent the thin plate from shaking during transportation.

[0086] like Fig. 9As shown, as an alternative embodiment, the adjustment clamp a7 can be connected to the bottom end of the steel belt a6, so that more space can be reserved on the steel belt a6 to facilitate the installation of other equipment.

[0087] Example 3

[0088] This embodiment provides a plate clamping system, comprising the conveying mechanism, positioning device and clamping mechanism in embodiment 2. The positioning device comprises a lifting mechanism, a pulling-down mechanism and a control mechanism.

[0089] The lifting mechanism is arranged directly below the slide bar and the lower clamp along the conveying direction of the steel strip, and the pull-down mechanism is arranged on one side of the slide bar along the conveying direction of the steel strip.

[0090] Specifically, Figures 10 to 12 As shown, the lifting mechanism 1 includes a first driving mechanism and a lifting platform 11. The first driving mechanism is a first cylinder 12, and the control mechanism is a PLC control, which is electrically connected to the first cylinder 12, and the lifting platform 11 is fixed on the driving end of the first cylinder 12. The lifting mechanism 1 also includes two fixed seats 13 and a plurality of supporting wheels 14. Among them, the two fixed seats 13 are symmetrically fixed on the lifting platform 11, and a rotating shaft 15 is provided between the two fixed seats 13. The number of the rotating shaft 15 corresponds to the supporting wheels 14, and the supporting wheels 14 are rotatably mounted on the rotating shaft 15. A groove is provided in the middle of the circumferential outer wall of each supporting wheel 14. The bottom of the part to be positioned is embedded in the groove of the supporting wheel 14 to achieve accurate positioning, thereby preventing the part to be positioned from shaking or shifting.

[0091] The plate clamping system of this structure includes the conveying mechanism in Example 2, which can ensure the verticality of the thin plate during the conveying process and effectively prevent the plate from getting stuck during the conveying process. At the same time, the positioning device of the plate clamping system of this structure can control the first driver to drive the lifting platform to the uniform height required by the lower clamp according to the uniform height required by the lower clamp through PLC control. The lower clamp is fixed at the bottom of the slide bar. When the height of the lower clamp needs to be adjusted, the clamping mechanism is used to open the adjustment clamp, the slide bar is released, and the lower clamp moves downward with the slide bar. The lower clamp stops moving when it drops to the upper surface of the lifting platform, and the uniform adjustment of the height of the lower clamp can be automatically achieved. The operation is simple, convenient, and efficient.

[0092] The clamping mechanism is arranged on the side of the slide bar along the direction of the steel strip. The clamping mechanism can be provided with three groups, two of which are used for the clamping of the upper clamp and the lower clamp respectively, and the other group is used for the clamping of the adjustment clamp. The clamping mechanism for the clamping of the lower clamp can be driven to move up and down, so as to accurately locate the position of the lower clamp. Specifically, it can be driven by a cylinder or a screw. Fig.17As shown, the clamping mechanism includes: a left and a right clamping plate 5, and the two clamping plates 5 are arranged on both sides of the clamp. The left and right clamping plates 5 are driven respectively by a driving device, so that the left and right clamping plates 5 can be moved horizontally relative to each other, that is, the left and right clamping plates 5 are close to each other or away from each other; when the left and right clamping plates 5 are close to each other, the clamping plates can act on the clamp to open the clamp; when the left and right clamping plates are away from each other, the clamping plates can be separated from the clamp, so that the clamp remains clamped under the action of the spring.

[0093] When the part to be positioned is the lower fixture 4, the bottom of the lower fixture 4 is placed in the groove, the lower fixture 4 is fixed on the slide bar 3, and the slide bar 3 drives the lower fixture 4 forward as the steel belt drives forward. The setting of the supporting wheel 14 can reduce the friction between the lower fixture 4 and the lifting platform 11, prevent the lower fixture 4 from being worn, and the rotation of the supporting wheel 14 can guide and drive the forward movement of the lower fixture 4. The number of supporting wheels 14 is not limited, and the number can be one, two, three, four, etc., as long as it can carry the part to be positioned and reduce the friction between the part to be positioned and the lifting platform 11.

[0094] like Figures 13 to 15 As shown, the pull-down mechanism 2 includes a second driving mechanism, a third driving mechanism and a grabbing component 23 .

[0095] Specifically, the second driving mechanism includes a second stepping motor 211, a second lead screw 212, a second slider 213 and a second fixed plate 214. The second lead screw 212 is vertically arranged, and the end of the second lead screw 212 is connected to the output shaft of the second stepping motor 211, and is suitable for rotating around its central axis when driven by the second stepping motor 211. The second slider 213 is sleeved on the second lead screw 212, and is suitable for ascending or descending linear motion when subjected to the rotational force of the second lead screw 212; the second fixed plate 214 is arranged on the second slider 213.

[0096] The third driving mechanism is a second cylinder 22, which is fixed on the second fixing plate 214. The pulling component 23 is fixed on the driving end of the second cylinder 22. Fig.13 As shown, the middle part of the end of the grasping and pulling component 23 away from the second cylinder 22 is concave to form an accommodation area that can accommodate the component 23 to be grasped and pulled. For example, the component 23 to be grasped and pulled is a slide bar 3. The grasping and pulling component 23 moves toward the slide bar 3 under the drive of the second cylinder 22 and embeds the slide bar 3 into the accommodation area. The inner diameter of the accommodation area is smaller than the width of the lower clamp at the bottom end of the slide bar. The second stepper motor 211 drives the second fixing plate 214 to move downward, thereby driving the second cylinder 22 and the grasping and pulling component 23 to move downward. When the grasping and pulling component 23 moves to contact the lower clamp 4, the lower end surface of the grasping and pulling component 23 is clamped on the lower clamp 4, driving the lower clamp 4 to move downward to the required height.

[0097] like Fig.14As shown, the pull-down mechanism 2 further includes two guide rods 261 , which are respectively arranged on both sides of the second lead screw 212 and are arranged parallel to and on the same plane as the second lead screw 212 . A third slider 262 is provided on each guide rod 261 .

[0098] For example, the third slider 262 is a linear bearing. The two ends of the second fixed plate 214 are extended to the top of the two guide rods 261 and are respectively arranged on the third slider 262. When the second fixed plate 214 drives the second cylinder 22 to move upward or downward, the two ends of the second fixed plate 214 are arranged on the guide rod 261 through the third slider 262, which guides the movement of the second fixed plate 214. The second fixed plate 214 is arranged more stably, making its up and down movement more stable. The guide rod 261 can also be one, three, four, etc., as long as it can guide the up and down translation movement of the second fixed plate 214.

[0099] like Fig.15 As shown, the pull-down mechanism 2 further includes a grab-pull frame 24 and a fixed bracket 263. Specifically, the grab-pull frame 24 includes an upper plate 241, a lower plate 242 and a side plate 243. The end surfaces of the upper plate 241 and the lower plate 242 close to each other are respectively provided with a connecting bearing 264, and the upper and lower ends of the second lead screw 212 are sleeved in the connecting bearing 264. A fifth slider 265 is respectively provided on the upper and lower parts of the outer wall surface of the side plate 243 of the grab-pull frame 24, and a slide rail 266 cooperating with the fifth slider 265 is provided on the fixed bracket 263.

[0100] The pull-down mechanism 2 further includes a fourth driving mechanism. The fourth driving mechanism includes a fourth stepping motor 251, a fourth lead screw 252 and a fourth slider 253. The fourth lead screw 252 is connected to the output end of the fourth stepping motor 251 and is suitable for axial rotation under the drive of the fourth stepping motor 251; the fourth slider 253 is threadedly connected to the fourth lead screw 252 and is suitable for translation according to the rotation of the fourth lead screw 252.

[0101] The fixing bracket 263 is provided with a fixing plate 267, the fourth stepping motor 251 is fixed on the fixing plate 267, and the side plate 243 of the grabbing frame 24 is fixedly connected to the fourth slider 253. The fourth stepping motor 251 drives the fourth slider 253 to perform a translational motion perpendicular to the direction of the first cylinder 12, the second cylinder 22 and the second lead screw 212 (i.e. Fig.13 Movement in the left and right directions, Fig.16 translational movement perpendicular to the paper surface).

[0102] like Fig.16As shown, in the loading area, the slide bar 3 is set on the steel belt through the adjustment clamp, the steel belt is provided with an upper clamp, and the bottom of the slide bar 3 is provided with a lower clamp 4. The lifting mechanism 1 is fixed on the frame of the loading rack and is located directly below the lower clamp 4. When the height of the lower clamp 4 needs to be adjusted, the second cylinder 22 drives the grabbing and pulling component 23 to move toward the slide bar 3 for translation. The slide bar 3 is clamped in the accommodating area of ​​the grabbing and pulling component 23. The second stepper motor 211 drives the grabbing and pulling component 23 to move downward through the second fixed plate 214. When the grabbing and pulling component 23 moves downward to contact the upper end surface of the lower clamp 4, the grabbing and pulling component 23 continues to move downward, driving the lower clamp 4 and the slide bar 3 to move downward for a first distance, so that the position of the lower clamp 4 is lower than the preset height to be adjusted. Then, the first cylinder 12 drives the supporting wheel 14 to move upward according to the preset value. The supporting wheel 14 is provided with a position sensor electrically connected to the PLC control. When the supporting wheel 14 contacts the lower clamp 4, the position sensor can detect a signal. At this time, the second stepper motor 211 can be started to move the grabbing component 23 upward by a second distance, and under the joint action of the first cylinder 12 and the second stepper motor 211, the lower clamp 4 is moved to the precise height that needs to be adjusted.

[0103] The pull-down mechanism 2 determines the height of the lower fixture 4 by two actions: pulling down a first distance and rising a second distance during the rising process of the lifting mechanism 1, so that the height positioning of the lower fixture 4 is more accurate. The bottom of the lower fixture 4 is clamped in the groove of the supporting wheel 14, and the supporting wheel 14 supports the lower fixture 4 and the slide bar 3 to prevent the lower fixture 4 and the slide bar 3 from shaking during the process of installing the circuit board.

[0104] For example, when the lower fixture 4 needs to be lowered by 300 mm, the distance between the supporting wheel 14 of the lifting mechanism 1 and the lower fixture 4 at the initial position is set to 350 mm, and the lower fixture 4 is pulled down by 350 mm through the grabbing and pulling component 23, so that the lower fixture 4 contacts the lifting mechanism 1, and the position sensor detects the lower fixture 4. Then, the first cylinder 12 is started, and the grabbing and pulling component 23 is started to move upward, which together drive the lower fixture 4 to move upward by 50 mm, so that the lower fixture 4 can be accurately positioned.

[0105] During the pulling process of the grabbing and pulling component 23, the slide bar 3 and the lower clamp 4 continue to move forward with the steel belt, and the controller of the fourth stepper motor 251 can calculate the rotation speed of the fourth stepper motor 251 according to the output signal of the steel belt transmission, thereby driving the pull-down frame of the pull-down mechanism 2 to synchronously drive with the steel belt. The steel belt does not need to stop working during the positioning process, which can significantly improve production efficiency.

[0106] After the lower clamp 4 is positioned, the upper clamp is opened by the upper clamping mechanism, and the lower clamp is opened by the lower clamping mechanism, and the plate is clamped between the upper clamp and the lower clamp by a robot or manually to complete the loading. Then the plate is transported forward with the steel belt to the next process, such as electroplating process or etching process.

[0107] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled 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 methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A plate clamping device, characterized in that: include An upper clamp (a8) for connecting to a conveyor belt; A slide bar (3) is slidably connected to an adjusting fixture (a7) up and down, and the adjusting fixture (a7) is suitable for being connected to a conveyor belt; A lower clamp (4) is provided at the bottom end of the slide bar (3); The adjusting clamp comprises a fixed clamp (a1) and a movable clamp (a2); a sliding cavity (a12) is provided in the fixed clamp (a1); the sliding rod (3) is inserted into the sliding cavity (a12); the fixed clamp (a1) has a first clamping surface (a11), the first clamping surface (a11) is located on the inner wall surface of one end of the sliding cavity (a12); an opening is provided on the side wall of the fixed clamp (a1) opposite to the first clamping surface (a11); the movable clamp (a2) has a second clamping surface (a21) opposite to the first clamping surface (a11); the movable clamp (a2) is provided with a An outwardly extending boss (a22), the boss (a22) is opposite to the first clamping surface (a11) and is suitable for extending into the interior of the opening, and the second clamping surface (a21) is arranged on the top end surface of the boss (a22); the fixed clamp (a1) and the movable clamp (a2) are rotatably connected via a rotating shaft (a3), and an elastic member (a4) is arranged between the fixed clamp (a1) and the movable clamp (a2), and under the action of the elastic member, the fixed clamp (a1) and the movable clamp (a2) have a biasing force that keeps the first clamping surface and the second clamping surface close to each other.

2. The sheet material clamping device according to claim 1, characterized in that: It also includes an anti-rotation structure, the anti-rotation structure comprising: A first plane is arranged on the side wall of the slide bar (3); A second plane (a121) is arranged on the inner side wall of the sliding cavity (a12) of the adjusting fixture (a7); When the sliding rod (3) slides in the sliding cavity (a12) of the adjusting fixture (a7), the first plane and the second plane (a121) are relatively matched.

3. A conveying mechanism, characterized in that: The plate clamping device comprises the plate clamping device according to claim 1 or 2, and conveyor belts; A plurality of adjustment clamps (a7) fixedly connected to the conveyor belt; A plurality of upper clamps (a8) are fixedly connected to the conveyor belt.

4. The conveying mechanism according to claim 3, characterized in that: The adjusting clamp (a7) and the upper clamp (a8) are fixed at the bottom end of the conveyor belt.

5. A sheet material clamping system, characterized in that: include: The conveying mechanism according to claim 3 or 4, further comprising: A lifting mechanism (1) comprises a first driving mechanism and a lifting platform (11) which can slide up and down and is used to lift the slide bar (3); the lifting mechanism (1) is arranged below the slide bar (3) along the direction of the conveyor belt; the lifting mechanism (1) also comprises two fixing seats (13) and a plurality of supporting wheels (14); An opening and closing mechanism is arranged on the side of the slide bar (3) along the direction of the conveyor belt and has a clamping plate for opening and closing the clamp; A pull-down mechanism (2) is slidably arranged on one side of the slide bar (3) along the direction of the conveyor belt; The pull-down mechanism (2) is provided with a grabbing component (23), and the middle portion of the grabbing component (23) is concave to form an accommodating area capable of accommodating the sliding rod (3).

6. The sheet material clamping system according to claim 5, characterized in that: The inner diameter of the accommodating area is smaller than the width of the lower clamp (4) at the bottom end of the sliding rod (3).

7. The sheet material clamping system according to claim 5 or 6, characterized in that: The supporting wheel (14) is provided with a groove for positioning the lower clamp (4).

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