A polishing device for a fire door

Abstract

The present invention relates to the technical field of polishing equipment, and particularly to a polishing equipment for fire doors, which includes a conveying rack one, a conveying member one and a conveying rack two arranged on a frame body, and a grinding member assembled on the frame body above the conveying member one; a control system one is provided between the frame body and the conveying rack one, so that the conveying rack one can perform vertical reciprocating motion; a control member one capable of controlling the vertical reciprocating motion of the conveying member one is provided on the frame body, a conveying member two is provided above the grinding member on the frame body, and a control member two capable of controlling the vertical reciprocating motion of the conveying member two; a control system two capable of controlling the vertical reciprocating motion of the conveying rack two is provided on the frame body. The present invention can optimize the process of traditional fire door polishing devices, save the complex door panel turning mechanism, improve the polishing efficiency of the polishing equipment, reduce the operation time, be applicable to door panels of different sizes, have a simpler structure and more stable operation.

Description

Technical Field

[0001] The present invention relates to the technical field of polishing equipment, and particularly to a polishing equipment for fire doors. Background Art

[0002] A fire door is an important building fire protection facility, and its core function is to effectively block the spread of fire, buying precious time for personnel evacuation and fire rescue. According to the regulations of national standards, qualified fire doors must undergo special fire-resistant coating treatment to meet the specified fire resistance limit requirements. To ensure the adhesion of the fire-resistant coating, the surface of the fire door needs to be polished to remove burrs, oxide layers, and old coatings on the surface of the fire door.

[0003] Currently, there are still some problems with the surface polishing process of fire doors in the industry. After the traditional polishing equipment finishes one-sided polishing, it relies on manual operation to flip the door panel, which not only increases labor costs but also severely restricts production efficiency.

[0004] Referring to the Chinese patent document with the authorization announcement number CN221364078U, the announcement date of July 19, 2024, and the name of a fire door polishing device, after one-sided polishing of the fire door panel, the door panel enters the inner cavity of the flipping plate, and the flipping plate flips 180 degrees to turn the door panel over. Then, the door panel is pushed back into the grinding cavity for polishing. It realizes automatic flipping of the door panel that has completed one-sided grinding and can automatically send the door panel back into the grinding cavity for grinding on the other side, thereby achieving the purpose of saving labor costs.

[0005] For the above-mentioned related technologies, there are still some technical defects: the inner cavity of the flipping plate adopts a fixed-size design, which can only adapt to door panels of specific specifications, severely limiting the versatility of the equipment; when the inner cavity size precisely matches the door panel, relative sliding is likely to cause surface scratches, while leaving a gap will lead to a risk of collision during the flipping process; if an anti-collision structure is added to the inner wall of the cavity, it will hinder the smooth movement of the door panel. Therefore, there is an urgent need for a polishing equipment for fire doors to solve the problem that the multi-sided polishing effect of existing equipment on door panels is not ideal. Summary of the Invention

[0006] In view of this, the present invention provides a polishing equipment for fire doors, aiming to solve the technical problem that the multi-sided polishing effect of door panels in the prior art is not ideal.

[0007] In order to solve the above technical problems, the present invention provides a polishing equipment for fire doors, which adopts the following technical solutions: a polishing equipment for fire doors, comprising a conveying frame 1, a transport part 1 and a conveying frame 2 which are arranged on a frame from left to right in sequence, and the frame is equipped with a polishing part located above the transport part 1; a control system 1 is provided between the frame and the conveying frame 1, so that the conveying frame 1 can perform vertical reciprocating motion; the frame is provided with a control part 1 that can control the vertical reciprocating motion of the transport part 1, the frame is provided with a transport part 2 located above the polishing part and a control part 2 that can control the vertical reciprocating motion of the transport part 2; the frame is provided with a control system 2 that can control the vertical reciprocating motion of the conveying frame 2.

[0008] By adopting the above technical solution, conveyor frame 1 transports the door panel to transport member 1. Transport member 1 cooperates with the polishing member to polish the top surface of the door panel and transport the door panel to the right. After the top surface polishing is completed, the door panel moves to conveyor frame 2 on the right. Control system 2 controls conveyor frame 2 to move upward, transport the door panel upward, and transport the door panel from the right to conveyor frame 2. Transport member 2 cooperates with the polishing member to polish the bottom surface of the door panel and transport the door panel to the left. Control system 1 controls conveyor frame 1 to move upward. After moving upward, conveyor frame 1 receives the door panel after the bottom surface polishing, completing the polishing of the top and bottom surfaces of the door panel. For door panels of different thicknesses, the vertical heights of transport member 1 and transport member 2 are adjusted by control member 1 and control member 2 to ensure that the door panel passes through and completes the polishing.

[0009] The process of traditional fire door polishing device has been optimized, and the original single-sided polishing, flipping and secondary polishing process has been optimized to single-sided polishing, upward movement and reverse polishing, thereby eliminating the complicated door panel flipping mechanism. Only a simple vertical movement of the door panel is required, thereby solving the shortcomings of poor adaptability, easy damage to door panels and complex structure brought by the previous door panel flipping mechanism, improving the polishing efficiency of the polishing equipment, reducing the operation time, and being suitable for door panels of different sizes. It has a simpler structure, more stable operation, increased equipment safety, reduced human intervention in the processing process, and can polish two door panels at the same time. The two door panels are located above and below the polishing piece respectively, thereby improving the polishing efficiency.

[0010] Optionally, the grinding pieces are provided in multiple groups and arranged in parallel, and a support roller is provided between two adjacent groups of grinding pieces.

[0011] By adopting the above technical solution, the support roller provides support force to the door panel above, which can improve the stability of door panel transportation and the flatness of the polished surface. The rotation of the support roller can cooperate with the transport parts to ensure the one-way movement of the door panel, optimize the smoothness of the door panel movement, and minimize the risk of door panel jamming.

[0012] Optionally, the front and rear sides of the frame are both provided with side grinding rollers and drive components, and the drive components are used to control the side grinding rollers to move in the front and rear directions.

[0013] By adopting the above technical solution, when the door panel passes through the grinding roller, the two side grinding rollers can synchronously polish the front and back sides of the door panel, thereby improving the integrity of the process. No additional steps or manual side polishing are required, thereby improving the polishing efficiency. The position of the side grinding roller is adjusted by the drive component to avoid conflicts between the side grinding rollers and the door panel as much as possible.

[0014] Optionally, the control system can cause the conveyor frame to tilt from top to bottom and to the left.

[0015] By adopting the above technical solution, the conveyor frame can be tilted, which facilitates the loading and unloading process of the door panels and helps save manpower.

[0016] Optionally, a blocking rod and a driving member for controlling the left and right movement of the blocking rod are provided at the left end of the conveying frame 1, and the blocking rod extends in the front-to-back direction.

[0017] By adopting the above technical solution, during the loading and unloading process of the door panel, the stop rod can limit the position of the door panel and enhance the stability of the device. After the bottom surface of the door panel is polished, the door panel moves to the conveyor rack and moves downward with the conveyor rack. At this time, the stop rod pushes the door panel to the right, so that the right side of the door panel can be connected with the polishing piece, thereby polishing the right side of the door panel, further improving the integrity of the process and the polishing efficiency.

[0018] Optionally, two sets of calibration parts are symmetrically provided on the conveying frame 1, and the calibration parts can push the door panel to the middle of the conveying frame 1 and make the front side of the door panel parallel to the left and right directions.

[0019] By adopting the above technical solution, the feed deviation can be eliminated and the deviation of the door panel in the front and rear directions can be limited, which helps to improve the grinding and polishing effect of the door panel and improve the flatness of the polished surface.

[0020] Optionally, the calibration part includes rod one, rod two, rod three and electric push rod four, the left end of electric push rod four is hinged to conveyor frame one, the output end of electric push rod four is hinged to the front end of rod one, rod one and rod two are arranged in parallel, the front ends of rod one and rod two are hinged to the two ends of rod three in turn, the middle parts of rod one and rod two are hinged to conveyor frame one, and the rear ends of rod one and rod two are rotatably connected to rollers.

[0021] Optionally, a blocking rod and a driving member are provided at the right end of the conveying frame 2, and two sets of calibration members are symmetrically provided on the conveying frame 2.

[0022] By adopting the above technical solution, after the top surface of the door panel is polished, the door panel moves to the conveyor rack 2 and moves upward with the conveyor rack 2. At this time, the baffle pushes the door panel to the left, so that the left side of the door panel can be connected with the polishing piece, thereby polishing the left side of the door panel, further improving the integrity of the process and the polishing efficiency, and the setting of the baffle helps to feed the door panel stably.

[0023] Optionally, the transport member 1 includes a plurality of rollers arranged in parallel in the left-right direction and two beams arranged in parallel in the front-back direction, and the plurality of rollers rotate in sequence and are arranged between the two beams. The right end of the conveying frame 1 and the left end of the conveying frame 2 are fixedly connected to a limiting block, and the limiting block can abut against the top surface of the beam.

[0024] By adopting the above technical solution, the stability of the device can be improved, which helps to facilitate the smooth movement of the door panel.

[0025] Optionally, the control system 1 includes an electric push rod 1 and an electric push rod 2, a horizontally placed cross bar is provided at the bottom of the frame, the bottom of the electric push rod 1 is fixedly connected to the cross bar, the output end of the electric push rod 1 is hinged to the bottom surface of the conveying frame 1, the electric push rod 2 is located on the right side of the electric push rod 1, and the two ends of the electric push rod 2 are hinged to the cross bar and the bottom surface of the conveying frame 1 in sequence; the control system 2 includes an electric push rod 3 and two limit rods, the bottom end of the electric push rod 3 is hinged to the cross bar, the output end of the electric push rod 3 is hinged to the bottom surface of the conveying frame 2, the two limit rods are arranged parallel in the left and right directions, the top of the limit rod is fixedly connected to the bottom surface of the conveying frame 2, and the bottom of the limit rod is vertically slidably inserted into the frame.

[0026] In summary, the present invention has the following beneficial technical effects:

[0027] 1. The process of the traditional fire door polishing device has been optimized, eliminating the complex door panel flipping mechanism, solving the shortcomings of the previous door panel flipping mechanism, such as poor adaptability, easy damage to the door panel, and complex structure. The polishing efficiency of the polishing equipment is improved, the operation time is reduced, and it is suitable for door panels of different sizes. The structure is simpler, the operation is more stable, the safety of the equipment is increased, and human intervention in the processing process is reduced. It can also polish two door panels at the same time. The two door panels are located above and below the polishing piece respectively, which improves the polishing efficiency.

[0028] 2. The support roller can improve the stability of door panel transportation and improve the flatness of the polished surface. The support roller can cooperate with the transport parts to ensure the one-way movement of the door panel, optimize the smoothness of the door panel movement, and minimize the risk of door panel jamming.

[0029] 3. The two side grinding rollers can polish the front and back sides of the door panel simultaneously, improving the integrity of the process. There is no need for additional processes or manual polishing of the sides, which improves polishing efficiency.

[0030] 4. The first conveying rack can be tilted, which is convenient for the loading and unloading process of the door panel and helps to save manpower.

[0031] 5. The stop bar can limit the position of the door panel and improve the stability of the device; moreover, the stop bar can push the door panel to polish the left and right sides of the door panel by the polishing roller, improving the polishing efficiency. Description of the Drawings

[0032] Figure 1 Schematic diagram of the overall structure of the embodiment of the present invention Figure 1 ;

[0033] Figure 2 is Figure 1 partial enlarged schematic diagram of part A in

[0034] Figure 3 Cross-sectional schematic diagram of the overall structure of the embodiment of the present invention;

[0035] Figure 4 is Figure 3 partial enlarged schematic diagram of part B in

[0036] Figure 5 is Figure 3 partial enlarged schematic diagram of part C in

[0037] Figure 6 Schematic diagram of the structures of the first conveying rack, the first transporting member, the second conveying rack, the grinding member and the second transporting member in the embodiment of the present invention;

[0038] Figure 7 is Figure 6 partial enlarged schematic diagram of part D in

[0039] Description of the reference numerals: 1. Frame body; 110. Cross bar; 2. First conveying rack; 21. Connecting frame; 22. Conveying roller; 3. First transporting member; 31. Cross beam; 32. Rotating roller; 4. Second conveying rack; 5. Grinding member; 51. Grinding roller; 6. Second transporting member; 7. First control system; 71. First electric push rod; 72. Second electric push rod; 8. First control member; 9. Second control member; 10. Second control system; 101. Third electric push rod; 102. Limiting rod; 11. Supporting roller; 12. Side grinding roller; 13. Auxiliary member; 131. Stop bar; 132. Driving member; 14. Calibrating member; 141. First rod; 142. Second rod; 143. Third rod; 144. Fourth electric push rod; 145. Roller; 15. Limiting block. Detailed Embodiment

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified or limited, the terms "installed", "connected", and "connected" should be understood in a broad sense.

[0041] The following is combined with Figure 1 -Attached Figure 7 The present invention is described in further detail.

[0042] The embodiment of the present invention discloses a polishing device for fire doors. Figures 1 to 7 A polishing device for fire doors includes a frame 1, a conveying frame 2, a transport piece 3, a conveying frame 4, a polishing piece 5 and a transport piece 6.

[0043] Reference Figure 1 and Figure 3 The frame 1 is arranged on the horizontal ground, and the frame 1 plays a supporting role. The conveying frame 2, the transport part 1 3 and the conveying frame 2 4 are arranged on the frame 1 from left to right. The grinding part 5 and the transport part 2 6 are both arranged on the frame 1, and the grinding part 5 is arranged above the transport part 1 3, and the transport part 2 6 is arranged above the grinding part 5.

[0044] Specifically, refer to Figure 1 and Figure 2 The conveyor frame 1 2 and the conveyor frame 2 4 have the same structure, both including a connecting frame 21 and a plurality of conveyor rollers 22. The plurality of conveyor rollers 22 are arranged in parallel in the left and right directions. The conveyor rollers 22 are rotatably connected to the connecting frame 21. The plurality of conveyor rollers 22 can rotate around their own central axes. Figure 3 and Figure 4 The transport member 1 3 and the transport member 2 6 have the same structure, both including two cross beams 31 and a plurality of rollers 32. The plurality of rollers 32 are arranged parallel to each other in the left and right directions. The plurality of rollers 32 are rotatably arranged between the two cross beams 31. The plurality of rollers 32 can rotate around their own central axis. Figure 3 and Figure 4 The grinding member 5 includes a plurality of grinding rollers 51 arranged in parallel in the left-right direction. Each of the grinding rollers 51 is capable of rotating about its own central axis. The rotation of the conveying roller 22, the rotating roller 32, and the grinding rollers 51 is well known to those skilled in the art and will not be described in detail here.

[0045] The conveying rack 1 2 and the conveying rack 2 4 play the role of conveying and receiving. The transport part 1 3 and the transport part 2 6 can cooperate with the polishing part 5 to enable the door panel to move in a directional manner to facilitate polishing of the door panel.

[0046] Reference Figure 1 and Figure 3, a control system one (7) is arranged between the frame body (1) and the first conveying frame (2), and the control system one (7) can control the movement of the first conveying frame (2). Under the control of the control system one (7), the first conveying frame (2) can perform reciprocating motion in the vertical direction and can also be in a state of tilting downward from top to left.

[0047] The first conveying frame (2) moves vertically, so that the first conveying frame (2) can adapt to the position of the door panel. Whether the door panel is above or below the polishing part (5), it can be received and conveyed by the first conveying frame (2), ensuring the stable operation of the device. And the vertical movement of the connecting frame (21) belongs to the mature prior art with stable structure, which helps to ensure the stable operation of the polishing equipment. The first conveying frame (2) tilts downward from top to left, which is convenient for placing the door panel to be polished on the first conveying frame (2) or taking off the polished door panel from the first conveying frame (2), helping to save manpower, speed up the loading and unloading of the door panel, and thus improve the polishing efficiency.

[0048] Refer to Figure 3 , specifically, the control system one (7) includes an electric push rod one (71) and an electric push rod two (72). A horizontally placed cross bar (110) is arranged at the bottom of the frame body (1). The bottom of the electric push rod one (71) is fixedly connected to the cross bar (110), and the output end of the electric push rod one (71) is hinged to the bottom surface of the first conveying frame (2). The electric push rod two (72) is located on the right side of the electric push rod one (71), and both ends of the electric push rod two (72) are sequentially hinged to the cross bar (110) and the bottom surface of the first conveying frame (2).

[0049] When the lengths of the electric push rod one (71) and the electric push rod two (72) are the same and they extend and retract together, the vertical movement of the first conveying frame (2) can be controlled. When the output end of the electric push rod one (71) retracts and the output end of the electric push rod two (72) extends, the first conveying frame (2) can be set to tilt downward from top to left. Controlled by the electric push rod one (71) and the electric push rod two (72), the structure is stable, the technology is mature, it is convenient to control the tilt angle and vertical movement of the first conveying frame (2), and the structure is flexible.

[0050] Refer to Figure 3 and Figure 4 , a control part one (8) is arranged between the frame body (1) and the first transport part (3), and the control part one (8) can control the vertical reciprocating movement of the first transport part (3).

[0051] By changing the vertical position of the first transport part (3), the interval between the first transport part (3) and the bottom surface of the polishing roller (51) can be changed, thereby expanding the applicable range of the device and making the device applicable to the polishing operation of fire doors with different thicknesses.

[0052] Specifically, the control part one (8) is a linear driving device, and the linear driving device is an electric push rod or a hydraulic cylinder.

[0053] Refer to Figure 3 and Figure 4 , a control part two (9) is arranged between the frame body (1) and the second transport part (6), and the control part two (9) can control the vertical reciprocating movement of the second transport part (6).

[0054] By changing the vertical position of the second transport member 6, the interval between the second transport member 6 and the top surface of the grinding roller 51 can be changed, thereby expanding the scope of application of the device and making the device suitable for polishing fire doors of different thicknesses.

[0055] Specifically, the second control member 9 is a linear drive device, which is an electric push rod or a hydraulic cylinder.

[0056] Reference Figure 1 and Figure 3 A control system 10 is provided between the frame 1 and the conveying frame 4. The control system 10 can control the conveying frame 4 to reciprocate in the vertical direction.

[0057] The conveying frame 2 4 drives the door panel to move vertically, and the door panel with the polished top surface is conveyed upward to the top of the grinding roller 51 and the bottom surface of the door panel is polished.

[0058] Reference Figure 3 Specifically, the control system 2 10 includes an electric push rod 3 101 and four limit rods 102. The bottom end of the electric push rod 3 101 is hinged to the cross bar 110, and the output end of the electric push rod 3 101 is hinged to the bottom surface of the conveyor frame 2 4. The four limit rods 102 are divided into a group of two. The two groups of limit rods 102 are arranged in parallel in the front and rear directions, and the two limit rods 102 in each group are arranged in parallel in the left and right directions. The top of the limit rod 102 is fixedly connected to the bottom surface of the conveyor frame 2 4, and the bottom of the limit rod 102 is vertically slidably inserted into the frame body 1.

[0059] The setting of the limiting rod 102 can improve the stability of the conveying frame 24 during the vertical movement.

[0060] Reference Figure 3 and Figure 4 Furthermore, the frame 1 is provided with a plurality of support rollers 11. The plurality of support rollers 11 are grouped in pairs, with the two support rollers 11 in each group being arranged vertically and in parallel. The plurality of support rollers 11 are arranged horizontally and in parallel, and the support rollers 11 are capable of rotating about their own central axes. Driving the plurality of support rollers 11 to rotate and the aforementioned rotating rollers 32 to rotate are both well-known techniques to those skilled in the art, and can be driven, for example, by a belt drive, and are not described in detail herein.

[0061] The support roller 11 provides support force for the door panel above, which can improve the stability of door panel transportation and the flatness of the polished surface. The rotation of the support roller 11 can cooperate with the transport part 2 6 to ensure the unidirectional movement of the door panel, optimize the smoothness of the door panel movement, and minimize the risk of door panel jamming.

[0062] Reference Figure 3 and Figure 4, Further, side grinding rollers 12 and drive components are provided on both the front side and the rear side of the frame body 1. The drive component can change the position of the side grinding rollers 12 to move the side grinding rollers 12 in the front-rear direction, and the side grinding rollers 12 rotate around their own central axes. Specifically, the drive component is a linear drive device, and the linear drive device is an electric push rod or a hydraulic cylinder. Among them, the rotation of the side grinding rollers 12 around their own central axes belongs to the technical content well-known to those skilled in the art and will not be elaborated here.

[0063] When the door panel passes through the grinding roller 51, the two side grinding rollers 12 can polish the front side and the rear side of the door panel synchronously, improving the integrity of the process. There is no need for additional processes or manual polishing of the sides, improving the polishing efficiency. By adjusting the position of the side grinding rollers 12 through the drive component, the situation where the side grinding rollers 12 conflict with the door panel can be avoided as much as possible.

[0064] Refer to Figure 3 and Figure 5 , Further, auxiliary components 13 are provided at both the left end of the first conveying frame 2 and the right end of the second conveying frame 4. The auxiliary component 13 includes a stop bar 131 and a drive member 132. The stop bar 131 extends in the front-rear direction, and the drive member 132 can control the stop bar 131 to move in the left-right direction. Specifically, the drive member 132 is a linear drive device, and the linear drive device is an electric push rod or a hydraulic cylinder.

[0065] For the stop bar 131 on the first conveying frame 2, during the loading and unloading processes of the door panel, the stop bar 131 can limit the position of the door panel, improving the stability of the device. After the top surface of the door panel is polished, the door panel moves onto the second conveying frame 4 and moves upward with the second conveying frame 4. At this time, the stop bar 131 pushes the door panel to the left, enabling the left side of the door panel to contact the grinding member 5, thereby grinding the left side of the door panel, and the setting of the stop bar 131 helps the stable feeding of the door panel. After the bottom surface of the door panel is polished, the door panel moves onto the first conveying frame 2 and moves downward with the first conveying frame 2. At this time, the stop bar 131 pushes the door panel to the right, enabling the right side of the door panel to contact the grinding member 5, thereby grinding the right side of the door panel, further improving the integrity of the process and the polishing efficiency.

[0066] Further, calibration components are provided on both the first conveying frame 2 and the second conveying frame 4. The calibration component includes two sets of symmetrically arranged calibration members 14.

[0067] Refer to Figure 1 and Figure 2 , The calibration member 14 can eliminate the offset existing during the feeding process of the door panel, limit the offset of the door panel in the front-rear direction, contribute to improving the effect of grinding and polishing the door panel, and improving the flatness of the polished surface.

[0068] Specifically, the calibration member 14 includes a first rod 141, a second rod 142, a third rod 143, and a fourth electric push rod 144. The left end of the fourth electric push rod 144 is hinged to the first conveying frame 2, and the output end of the fourth electric push rod 144 is hinged to the front end of the first rod 141. The first rod 141 and the second rod 142 are arranged in parallel. The front ends of the first rod 141 and the second rod 142 are successively hinged to both ends of the third rod 143. The middle parts of the first rod 141 and the second rod 142 are both hinged to the first conveying frame 2. Roller wheels 145 are rotatably connected to the rear ends of the first rod 141 and the second rod 142.

[0069] Referring to Figure 6 and Figure 7 , further, limit blocks 15 are fixedly connected to the right end of the first conveying frame 2 and the left end of the second conveying frame 4. The limit blocks 15 can abut against the top surface of the cross beam 31 of the first transporting member 3.

[0070] Since the first transporting member 3 can move vertically, by providing the limit blocks 15 which can abut against the cross beam 31, the downward movement distance of the limit blocks 15 can be restricted, ensuring that the top surfaces of the conveying rollers 22 of the first conveying frame 2 and the second conveying frame 4 are flush with the top surface of the rotating rollers 32 of the first transporting member 3, which is beneficial to the smooth movement of the door panel. Since the position of the grinding member 5 relative to the frame body 1 remains unchanged in the vertical direction, when the first conveying frame 2 and the second conveying frame 4 move upward to a specified height, the top surfaces of their own conveying rollers 22 can be made flush with the top surface of the grinding roller 51, ensuring the smooth movement of the door panel.

[0071] The implementation principle of a polishing device for a fire door in an embodiment of the present invention is as follows:

[0072] The output end of the first electric push rod 71 retracts, and the output end of the second electric push rod 72 extends. The first conveying frame 2 is inclined downward and to the left from top to bottom. The stop rod 131 is controlled by the driving member 132 on the first conveying frame 2 to move towards the left end of the first conveying frame 2. The door panel is placed obliquely on the first conveying frame 2, and the door panel abuts against the stop rod 131. The stop rod 131 can support the door panel. Then, through the control of the first electric push rod 71 and the second electric push rod 72, the first conveying frame 2 is restored to a horizontal state, and the limit block 15 on the first conveying frame 2 abuts against the cross beam 31 of the first transporting member 3, completing the loading of the door panel.

[0073] After that, the conveying rollers 22 of the first conveying frame 2 rotate, causing the door panel to move to the right. The two calibration members 14 on the first conveying frame 2 cooperate, and the two roller wheels 145 successively abut against the front side and the rear side of the door panel to calibrate the position of the door panel. The door panel enters between the first transporting member 3 and the bottom surface of the grinding roller 51, and the door panel continues to move to the right, completing the first feeding of the door panel. When the door panel enters between the first transporting member 3 and the grinding roller 51, the grinding roller 51 grinds the top surface of the door panel. During the rightward movement of the door panel, the two side grinding rollers 12 respectively grind the front side and the rear side of the door panel.

[0074] After the top surface of the door panel is polished, the door panel moves to the right to the conveyor frame 2 4, and the output end of the electric push rod 3 101 extends, causing the conveyor frame 2 4 to move upward. During the upward movement of the conveyor frame 2 4, the blocking rod 131 on the conveyor frame 2 4 pushes the door panel to the left, so that the left side of the door panel is connected to the side of the grinding roller 51, completing the polishing of the left side of the door panel, and the conveyor frame 2 4 moves upward until the bottom surface of the door panel is flush with the top surface of the grinding roller 51, and the conveyor frame 2 4 conveys the door panel to the left. During the conveying process, the calibration part 14 on the conveyor frame 2 4 will calibrate the position of the door panel to complete the second feeding of the door panel.

[0075] The door panel enters between transport member 2 6 and the top surface of grinding roller 51, where grinding roller 51 grinds the bottom surface of the door panel. Conveyor frame 1 2 moves upward to receive the polished door panel, which then moves downward. During this movement, the stopper 131 on conveyor frame 1 2 pushes the door panel to the right, bringing the right side of the door panel into contact with the side of grinding roller 51.

[0076] At this point, the polishing and grinding of the top, bottom, front and back sides, and left and right sides of the door panel are completed.

[0077] Before grinding the door panel, the interval between the transport member 1 3 and the grinding roller 51 and the interval between the transport member 2 6 and the grinding roller 51 can be adjusted according to the thickness of the door panel.

Claims

1. A polishing device for a fire door, comprising a first conveying rack, a first transporting member, and a second conveying rack that are sequentially arranged on a frame from left to right. A grinding member is assembled on the frame above the first transporting member. It is characterized in that: A first control system is provided between the frame and the first conveying rack, enabling the first conveying rack to perform vertical reciprocating motion; A first control member for controlling the vertical reciprocating motion of the first transporting member is provided on the frame. A second transporting member is provided on the frame above the grinding member, and a second control member for controlling the vertical reciprocating motion of the second transporting member is provided; A second control system for controlling the vertical reciprocating motion of the second conveying rack is provided on the frame; The first control system can make the first conveying rack tilt leftward from top to bottom; The first control system includes a first electric push rod and a second electric push rod. A horizontal cross bar is provided at the bottom of the frame. The bottom of the first electric push rod is fixedly connected to the cross bar. The output end of the first electric push rod is hinged to the bottom surface of the first conveying rack. The second electric push rod is located on the right side of the first electric push rod. The two ends of the second electric push rod are sequentially hinged to the cross bar and the bottom surface of the first conveying rack; The second control system includes a third electric push rod and two limiting rods. The bottom end of the third electric push rod is hinged to the cross bar. The output end of the third electric push rod is hinged to the bottom surface of the second conveying rack. The two limiting rods are arranged in parallel in the left-right direction. The top of the limiting rod is fixedly connected to the bottom surface of the second conveying rack. The bottom of the limiting rod is vertically slidably inserted into the frame.

2. The polishing device for a fire door according to claim 1, characterized in that: There are multiple groups of the grinding members arranged in parallel, and a support roller is provided between adjacent two groups of grinding members.

3. A polishing device for a fire door according to claim 1, characterized in that: Side grinding rollers and drive components are provided on both the front side and the rear side of the frame. The drive component is used to control the movement of the side grinding rollers in the front-rear direction.

4. A polishing device for a fire door according to claim 1, characterized in that: A stop rod and a drive member for controlling the left-right movement of the stop rod are provided at the left end of the first conveying rack. The stop rod extends in the front-rear direction.

5. A polishing device for a fire door according to claim 4, characterized in that: Two groups of calibration members are symmetrically provided on the first conveying rack. The calibration members can push the door panel to the middle of the first conveying rack and make the front side of the door panel parallel to the left-right direction.

6. The polishing device for a fire door according to claim 5, characterized in that: The calibration member includes a first rod, a second rod, a third rod, and a fourth electric push rod. The left end of the fourth electric push rod is hinged to the first conveying rack. The output end of the fourth electric push rod is hinged to the front end of the first rod. The first rod and the second rod are arranged in parallel. The front ends of the first rod and the second rod are sequentially hinged to both ends of the third rod. The middle parts of the first rod and the second rod are both hinged to the first conveying rack. Rolling wheels are rotatably connected to the rear ends of the first rod and the second rod.

7. A polishing device for a fire door according to claim 6, characterized in that: A stop rod and a drive member are provided at the right end of the second conveying rack. Two groups of calibration members are symmetrically provided on the second conveying rack.

8. A polishing device for a fire door according to claim 1, characterized in that: The first transporting member includes a plurality of rotating rollers arranged in parallel in the left-right direction and two cross beams arranged in parallel in the front-rear direction. The plurality of rotating rollers are sequentially rotatably arranged between the two cross beams. Limiting blocks are fixedly connected to the right end of the first conveying rack and the left end of the second conveying rack. The limiting blocks can abut against the top surface of the cross beam.

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