An anti-collision device for a liquid crystal substrate glass grinding and cleaning machine

Abstract

This invention discloses an anti-collision device for a liquid crystal substrate glass grinding and washing machine, comprising a detection mechanism, a buffer mechanism, and a PLC control system. The detection mechanism includes a mounting bracket, a linear slider, a limit switch, and a trigger plate. The mounting bracket includes a trigger plate bracket and a limit switch bracket. The buffer mechanism includes a mounting base, a spring support rod, and a stop block. The mounting base includes a stop block bracket and a spring support rod base. The spring support rod includes a spring, a damping rod, a rubber head, and a fixing plate. The PLC control system includes a PLC, a servo motor controller, a servo motor, and an HMI interactive screen. This anti-collision device for the liquid crystal substrate glass grinding and washing machine prevents collisions between two machines, avoiding serious equipment malfunctions such as bending and deformation of the machine guide rails, and leaving severe damage to the equipment without affecting the subsequent grinding and washing accuracy. It also avoids the complex and time-consuming maintenance process that often requires three to five days of downtime, resulting in significant economic losses.

Description

Technical Field

[0001] This invention relates to the field of liquid crystal substrate glass manufacturing, specifically to an anti-collision device for a liquid crystal substrate glass grinding and washing machine. Background Technology

[0002] In the LCD substrate glass production line, after the semi-finished LCD substrate glass undergoes a precision cutting process, it flows to the grinding and cleaning process to grind and clean its four sides and four corners, thereby improving the quality of the glass edges and corners. During the glass grinding process, since it is necessary to grind the four sides, the equipment is equipped with two machines, which are installed on the same pair of guide rails. The glass is transported between the two machines through a gripping device, and the two machines perform grinding and cleaning processing on the glass in the X and Y directions respectively.

[0003] However, in actual use, there have been many instances of collisions and interference between the two machines due to equipment failure, program vulnerabilities, or human error, resulting in serious equipment failures such as bending and deformation of the machine guide rails, leaving serious damage to the equipment and greatly affecting the subsequent grinding and washing accuracy; at the same time, the maintenance process is complicated and time-consuming, often requiring a shutdown of three to five days, resulting in significant economic losses. Summary of the Invention

[0004] The purpose of this invention is to provide an anti-collision device for a liquid crystal substrate glass grinding and washing machine to solve the defects mentioned in the background art.

[0005] To achieve the above objectives, a collision prevention device for a liquid crystal substrate glass grinding and washing machine is provided, comprising a detection mechanism, a buffer mechanism, and a PLC control system. The detection mechanism includes a mounting bracket, a linear slider, a limit switch, and a trigger plate. The mounting bracket includes a trigger plate bracket and a limit switch bracket. The buffer mechanism includes a mounting base, a spring support rod, and a stop block. The mounting base includes a stop block bracket and a spring support rod base. The spring support rod includes a spring, a damping rod, a rubber head, and a fixing plate. The PLC control system includes a PLC, a servo motor controller, a servo motor, and an HMI interactive screen. The tail of the limit switch bracket is fixed to the forward direction side of the grinding and washing machine A with screws, and the lower side of the middle section of the limit switch bracket is fixed to the surface of the linear slider with screws. The tail of the trigger plate bracket is fixed to the backward direction side of the grinding and washing machine B with screws, and the lower side of the middle section of the trigger plate bracket is fixed to the linear slider with screws.

[0006] Furthermore, a linear guide rail is installed between the grinding and washing machine platform A and the grinding and washing machine platform B, and the two sets of linear guide rails are arranged in parallel. At the same time, the dimensions of the linear guide rails and the linear slider are matched, and the linear slider is slidably arranged on the outside of the linear guide rails. The cross-section of the linear slider is U-shaped.

[0007] Furthermore, two sets of trigger plate brackets are set on the end face of the grinding and washing machine platform B, and two sets of limit switch brackets are set on the end face of the grinding and washing machine platform A. At the same time, linear sliders are installed at the bottom of both sets of trigger plate brackets and both sets of limit switch brackets.

[0008] Furthermore, two sets of detection mechanisms and buffer mechanisms are set up, and the two sets of detection mechanisms and buffer mechanisms are symmetrically installed on both sides of the grinding and washing machine platform A and grinding and washing machine platform B.

[0009] Furthermore, the limit switch is a rotary limit switch, and there are two sets of limit switches installed at the front and rear of the limit switch bracket. The limit switch bracket is made of metal in an "I" shape, and both sets of limit switches are equipped with trigger plates with the ends of the trigger plates bent upwards.

[0010] Furthermore, the damping rod is a cylindrical structure made of stainless steel, and the fixing plate is a rectangular structure made of aluminum alloy. A guide groove is provided directly below the fixing plate, and the guide groove is assembled with the guide strip fixed above the trigger plate bracket. The stop block is a rectangular structure made of nylon.

[0011] Furthermore, a spring is installed on the outer side of the damping rod, and a rubber head is installed at the end of the damping rod. The rubber head includes a trigger seat, and a stud is fixedly installed at the bottom of the trigger seat. At the same time, a trigger switch is installed inside the trigger seat, and a wiring harness is provided on the trigger switch. The trigger switch is electrically connected to an alarm installed on the grinding and washing machine through the wiring harness.

[0012] Furthermore, the stud is screwed into the screw hole on the end face of the damping rod away from the spring support base, and a screw position is provided on the upper side of the inner circumference of the trigger seat. At the same time, a screw sleeve is fixedly installed at the bottom of the rubber contact seat. The size of the screw sleeve is matched with that of the screw position, and the screw sleeve is screwed into the inside of the screw position.

[0013] Furthermore, the rubber contact seat and the trigger seat are fixed together by screw thread and screw sleeve, and a trigger block is installed inside the rubber contact seat. The trigger block is cylindrical and is positioned opposite to the trigger switch.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. In this invention, when the grinding and washing machine A and the grinding and washing machine B cross the safe working distance and enter the anti-collision program trigger range, the trigger piece in the detection component toggles the limit switch. This electrical signal is fed back to the PLC control system, and the system starts the anti-collision emergency program: the motors in the grinding and washing machine A and the grinding and washing machine B are brought to an emergency stop, all grinding and washing equipment stops working, and the HMI interactive screen alarms in real time.

[0016] 2. In this invention, if the brakes are not timely or fail, and grinding machine A and grinding machine B continue to move forward, the rubber head in the buffer mechanism abuts against the stop block, triggering a controllable collision state. The spring support rod compresses backward to provide a buffering effect. The triggering of the anti-collision mechanism is determined by components installed on the two machines and the guide rail. This mechanism is convenient for inspection, maintenance, and repair, while preventing collisions and interference between the two machines, thus avoiding serious equipment malfunctions such as bending and deformation of the machine guide rails, which could leave severe damage to the equipment and affect the subsequent grinding accuracy. It also avoids the complex and time-consuming maintenance process that often requires three to five days of downtime, resulting in significant economic losses. Attached Figure Description

[0017] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0018] Figure 1 This is a front view schematic diagram of the structure of the present invention;

[0019] Figure 2 for Figure 1 Side view;

[0020] Figure 3 This is a schematic diagram of the trigger plate bracket and its mounting structure according to the present invention;

[0021] Figure 4 This is a schematic diagram of the limit switch bracket and its mounting structure according to the present invention.

[0022] Figure 5 This is a schematic diagram of the rubber head and its mounting structure;

[0023] Figure 6 for Figure 5 The front view;

[0024] Figure 7 This is a schematic diagram of the damping rod and its installation structure.

[0025] Figure 8 This is a schematic diagram of the internal structure of the rubber head of the present invention;

[0026] Figure 9 The structure of this invention Figure 8 A bottom view;

[0027] Figure 10 The structure of this invention Figure 8 A sectional view.

[0028] [Figure Labels]

[0029] 10. Mounting bracket; 11. Trigger plate bracket; 12. Limit switch bracket; 20. Linear slider; 30. Limit switch; 40. Trigger plate; 100. Mounting base; 101. Stop block bracket; 102. Spring support rod base; 110. Spring support rod; 111. Spring; 112. Damping rod; 113. Rubber head; 1131. Stud; 1132. Trigger seat; 1133. Wiring harness; 1134. Screw mount; 1135. Trigger switch; 1136. Screw sleeve; 1137. Rubber contact seat; 11371. Trigger block; 114. Fixing plate; 120. Stop block; 200. PLC; 300. Grinding and washing machine base A; 310. Grinding and washing machine base B; 320. Linear guide rail. Detailed Implementation

[0030] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should also be noted that, to make the embodiments more comprehensive, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some well-known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0031] Detailed implementation method one: Please refer to Figure 1-10 This invention provides a technical solution: an anti-collision device for a liquid crystal substrate glass grinding and washing machine, comprising a detection mechanism, a buffer mechanism, and a PLC control system. The detection mechanism includes a mounting bracket 10, a linear slider 20, a limit switch 30, and a trigger plate 40. The mounting bracket 10 includes a trigger plate bracket 11 and a limit switch bracket 12. The buffer mechanism includes a mounting base 100, a spring support rod 110, and a stop block 120. The mounting base 100 includes a stop block bracket 101 and a spring support rod base 102. The spring support rod 110 includes a spring 1... 11. Damping rod 112, rubber head 113 and fixing plate 114; PLC control system includes PLC200, servo motor controller, servo motor and HMI interactive screen; the tail of limit switch bracket 12 is fixed to the forward direction side of grinding machine A300 by screws, and the lower side of the middle section of limit switch bracket 12 is fixed to the surface of linear slider 20 by screws; the tail of trigger plate bracket 11 is fixed to the backward direction side of grinding machine B310 by screws, and the lower side of the middle section of trigger plate bracket 11 is fixed to linear slider 20 by screws.

[0032] The testing mechanism includes a mounting bracket 10, a linear slider 20, a limit switch 30, and a trigger plate 40. The mounting bracket 10 includes a trigger plate bracket 11 and a limit switch bracket 12. The tail end of the trigger plate bracket 11 is fixed to the grinding and washing machine platform A300, and the lower middle part is fixed to the linear slider 20. The tail end of the limit switch bracket 12 is fixed to the grinding and washing machine platform B310, and the lower middle part is fixed to the linear slider 20. There are four linear sliders 20, which are installed on the linear guide rail 320 of the machine platform and have the functions of movement and guidance. Two of them are installed on the limit switch bracket 12, one in front and one behind. The trigger plate 40 is a section of stainless steel with a curved front end, which is installed on the trigger plate bracket 11.

[0033] The buffer mechanism includes a mounting base 100, a spring strut 110, and a stop block 120. There are two sets of buffer mechanisms, symmetrically arranged on both sides of the machine. The mounting base 100 includes a stop block bracket 101 and a spring strut base 102. The tail end of the stop block bracket 101 is mounted on the grinding machine A300. The spring strut base 102 is mounted on the grinding machine B310. The spring strut includes a spring, a damping rod, a damping head, and a fixing plate. The tail end of the spring strut 110 is mounted on the spring strut base 102, and the head end is placed in the guide of the limit switch bracket 12 to ensure that the spring strut 110 slides along the guide when it is compressed backward. The stop block 120 is mounted on the stop block bracket 101, and the head end is fixed to the limit switch bracket 12.

[0034] The PLC control system includes a PLC200, a servo motor controller, servo motors, and an HMI interactive screen. The PLC is used to determine whether the anti-collision emergency program needs to be triggered. The servo motor controller and servo motors have brake functions. The HMI interactive screen has functions such as real-time display of the relative distance between the grinding and washing machine A300 and the grinding and washing machine B310, the status of the limit switches, and real-time alarms.

[0035] During the grinding and cleaning process of grinding and washing machines A300 and B310, if an unexpected situation occurs—such as equipment failure, program glitch, or human error—and grinding and washing machines A300 and B310 exceed the safe working distance and enter the anti-collision program trigger range, the trigger plate 40 in the detection component will activate the limit switch 30. This electrical signal is fed back to the PLC control system, and the system will activate the anti-collision emergency program: the motors in grinding and washing machines A300 and B310 will be brought to an emergency stop, all grinding and washing equipment will stop working, and the HMI interactive screen will issue a real-time alarm. If the limit switch 30 fails due to a malfunction, the trigger plate 40 will activate the limit switch 30. Continuing forward and toggling limit switch 30 activates the anti-collision emergency procedure. If the brakes fail or are not applied in time, and the grinding machines A300 and B310 continue to move forward, the rubber head 113 in the buffer mechanism abuts against the stop block 120, triggering a controllable collision state. The spring support rod 110 compresses backward to provide a buffering effect. The anti-collision mechanism is triggered by components installed on the two machines and guide rails. This mechanism facilitates inspection, maintenance, and repair while preventing collisions between the two machines that could cause serious equipment malfunctions such as bending or deformation of the guide rails, leaving severe damage to the equipment and not affecting subsequent grinding accuracy. It also avoids complex and time-consuming maintenance processes that often require three to five days of downtime, resulting in significant economic losses.

[0036] When the rubber head 113 impacts the end of the stop block 120, the rubber contact seat 1137 on the rubber head 113 is forced to compress. Since the trigger block 11371 inside the rubber contact seat 1137 is positioned opposite to the trigger switch 1135, the trigger block 11371 moves laterally and abuts against the trigger switch 1135. The trigger switch 1135 receives the compression signal and transmits it to the alarm via the wiring harness 1133. The alarm then sounds, alerting the staff to an abnormality between the grinding and washing machines A300 and B310, prompting the staff to address the issue immediately. Inspection work was carried out on machine A300 and machine B310. When the trigger seat 1132 and rubber contact seat 1137 were installed together, the rubber contact seat 1137 was fixed inside the screw position 1134 by the screw sleeve 1136 on it. At this time, there was a distance between the trigger switch 1135 and the trigger block 11371. When the rubber contact seat 1137 was squeezed, the trigger block 11371 inside the rubber contact seat 1137 abutted against the trigger switch 1135, and the trigger switch 1135 activated the alarm to alert the on-site personnel.

[0037] Specific Implementation Method Two: This implementation method is a further limitation of Specific Implementation Method One. A linear guide rail 320 is installed between the grinding and washing machine platform A300 and the grinding and washing machine platform B310, and the two sets of linear guide rails 320 are arranged in parallel. At the same time, the dimensions of the linear guide rail 320 and the linear slider 20 are adapted to each other, and the linear slider 20 is slidably arranged on the outside of the linear guide rail 320. The cross-section of the linear slider 20 is arranged in a "U" shape.

[0038] Specific Implementation Method 3: This implementation method is a further limitation of Specific Implementation Method 1. Two sets of trigger plate brackets 11 are set on the end face of the grinding and washing machine B310, and two sets of limit switch brackets 12 are set on the end face of the grinding and washing machine A300. At the same time, linear sliders 20 are installed at the bottom of both sets of trigger plate brackets 11 and both sets of limit switch brackets 12.

[0039] Specific Implementation Method Four: This implementation method is a further limitation of Specific Implementation Method One. Both the detection mechanism and the buffer mechanism are set in two sets, and the two sets of detection mechanisms and buffer mechanisms are symmetrically installed on both sides of the grinding and washing machine platform A300 and the grinding and washing machine platform B310.

[0040] Specific Implementation Method 5: This implementation method is a further limitation of Specific Implementation Method 1. The limit switch 30 is a rotary limit switch, and there are two sets of limit switches 30 installed on the end face of the limit switch bracket 12, one in front and one in back. The limit switch bracket 12 is made of metal and is in the shape of an "I". Both sets of limit switches 30 are equipped with trigger plates 40, and the ends of the trigger plates 40 are bent upwards.

[0041] Specific Implementation Method Six: This implementation method is a further limitation of Specific Implementation Method One. The damping rod 112 is a cylindrical structure made of stainless steel, and the fixing plate 114 is a rectangular structure made of aluminum alloy. A guide groove is provided directly below the fixing plate 114, and the guide groove is assembled with the guide strip fixed above the trigger plate bracket 11. The stop block 120 is a rectangular structure made of nylon.

[0042] Specific Implementation Method Seven: This implementation method is a further limitation of Specific Implementation Method Six. A spring 111 is installed on the outside of the damping rod 112, and a rubber head 113 is installed at the end of the damping rod 112. The rubber head 113 includes a trigger seat 1132, and a stud 1131 is fixedly installed at the bottom of the trigger seat 1132. At the same time, a trigger switch 1135 is installed inside the trigger seat 1132, and a wire harness 1133 is provided on the trigger switch 1135. The trigger switch 1135 is electrically connected to the alarm installed on the grinding and washing machine through the wire harness 1133.

[0043] Specific Implementation Method Eight: This implementation method is a further limitation of Specific Implementation Method Seven. The stud 1131 is screwed and fixed inside the screw hole opened on the end face of the damping rod 112 away from the spring support rod base 102, and a screw position 1134 is opened on the upper side of the inner circumference of the trigger seat 1132. At the same time, a screw sleeve 1136 is fixedly installed on the bottom of the rubber contact seat 1137. The size of the screw sleeve 1136 is adapted to the screw position 1134, and the screw sleeve 1136 is screwed inside the screw position 1134.

[0044] Specific Implementation Method Nine: This implementation method is a further limitation of Specific Implementation Method Eight. The rubber contact seat 1137 and the trigger seat 1132 are fixed by screwing in the screw position 1134 and the screw sleeve 1136. The trigger block 11371 is installed inside the rubber contact seat 1137. The trigger block 11371 is cylindrical and is positioned opposite to the trigger switch 1135.

[0045] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary confusion regarding the essence of the invention, well-known methods, processes, flows, elements, and circuits are not described in detail. The above descriptions are merely preferred embodiments of the invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention.

Claims

1. A collision prevention device for a liquid crystal substrate glass grinding and washing machine, characterized in that: The system includes a detection mechanism, a buffer mechanism, and a PLC control system. The detection mechanism includes a mounting bracket (10), a linear slider (20), a limit switch (30), and a trigger plate (40). The mounting bracket (10) includes a trigger plate bracket (11) and a limit switch bracket (12). The buffer mechanism includes a mounting base (100), a spring support rod (110), and a stop block (120). The mounting base (100) includes a stop block bracket (101) and a spring support rod base (102). The spring support rod (110) includes a spring (111) and a damping rod (112). The rubber head (113) and the fixing plate (114) are included. The PLC control system includes a PLC (200), a servo motor controller, a servo motor and an HMI interactive screen. The tail of the limit switch bracket (12) is fixed to the forward direction side of the grinding machine platform A (300) by screws, and the lower side of the middle section of the limit switch bracket (12) is fixed to the surface of the linear slider (20) by screws. The tail of the trigger plate bracket (11) is fixed to the backward direction side of the grinding machine platform B (310) by screws, and the lower side of the middle section of the trigger plate bracket (11) is fixed to the linear slider (20) by screws. Linear guide rails (320) are installed between the grinding and washing machine platform A (300) and the grinding and washing machine platform B (310), and the two sets of linear guide rails (320) are arranged in parallel. At the same time, the dimensions of the linear guide rails (320) and the linear slider (20) are matched, and the linear slider (20) is slidably arranged on the outside of the linear guide rails (320). The cross-section of the linear slider (20) is U-shaped. The trigger plate bracket (11) is set in two sets on the end face of the grinding machine B (310), and the limit switch bracket (12) is set in two sets on the end face of the grinding machine A (300). At the same time, linear sliders (20) are installed at the bottom of both sets of trigger plate brackets (11) and both sets of limit switch brackets (12). The detection mechanism and the buffer mechanism are both set up in two sets, and the two sets of detection mechanism and buffer mechanism are symmetrically installed on both sides of the grinding and washing machine platform A (300) and the grinding and washing machine platform B (310); The limit switch (30) is a rotary limit switch, and there are two sets of limit switches (30) installed on the end face of the limit switch bracket (12) in front and behind. The limit switch bracket (12) is made of metal and is in the shape of an "I". Both sets of limit switches (30) are equipped with trigger pieces (40), and the ends of the trigger pieces (40) are bent upward.

2. The anti-collision device for a liquid crystal substrate glass grinding and washing machine according to claim 1, characterized in that: The damping rod (112) is a cylindrical structure made of stainless steel, and the fixing plate (114) is a rectangular structure made of aluminum alloy. A guide groove is provided directly below the fixing plate (114), and the guide groove is assembled with the guide strip fixed above the trigger plate bracket (11). The stop block (120) is a rectangular structure made of nylon.

3. The anti-collision device for a liquid crystal substrate glass grinding and washing machine according to claim 2, characterized in that: A spring (111) is installed on the outside of the damping rod (112), and a rubber head (113) is installed at the end of the damping rod (112). The rubber head (113) includes a trigger seat (1132), and a stud (1131) is fixedly installed at the bottom of the trigger seat (1132). At the same time, a trigger switch (1135) is installed inside the trigger seat (1132), and a wire harness (1133) is provided on the trigger switch (1135). The trigger switch (1135) is electrically connected to the alarm installed on the grinding and washing machine through the wire harness (1133).

4. The anti-collision device for a liquid crystal substrate glass grinding and washing machine according to claim 3, characterized in that: The stud (1131) is screwed and fixed inside the screw hole opened on the end face of the damping rod (112) away from the spring support rod base (102), and a screw position (1134) is opened on the upper side of the inner circumference of the trigger seat (1132). At the same time, a screw sleeve (1136) is fixedly installed on the bottom of the rubber contact seat (1137). The screw sleeve (1136) is adapted to the size of the screw position (1134), and the screw sleeve (1136) is screwed inside the screw position (1134).

5. The anti-collision device for a liquid crystal substrate glass grinding and washing machine according to claim 4, characterized in that: The rubber contact seat (1137) and the trigger seat (1132) are fixed together by screws (1134) and screw sleeve (1136). The rubber contact seat (1137) has a trigger block (11371) installed inside. The trigger block (11371) is cylindrical and is positioned opposite to the trigger switch (1135).

Images