Glass laminating machine with high safety

By setting up limit rods, magnetic suction blocks, lower suction components and upper suction components in the glass lamination machine, the problem of glass fitting surface deviation is solved, and the yield and safety of glass processing are improved.

CN222451634UActive Publication Date: 2025-02-11ZHANGJIAGANG WEIYU GLASSWARE CO LTD
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Patent Information

Application Number
CN202421159688.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-27
Publication Date
2025-02-11
Estimated Expiration
2034-05-27

AI Technical Summary

Technical Problem

The existing glass lamination machines can easily lead to deviation of the fitting surface during the glass bonding process, causing the glass to break when it heats up, which poses safety hazards.

Method used

设计了一种安全性高的玻璃夹胶机,通过在机箱内设置限位杆、磁吸块、下吸附组件和上吸附组件,确保玻璃在加工时稳定固定,避免贴合面偏差。

Benefits of technology

The yield rate of glass processing is improved, glass fragmentation caused by inaccurate bonding surfaces is prevented, and the safety of the glass lamination machine is enhanced.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of glass laminating machines, and discloses a high-safety glass laminating machine which comprises a case, a bearing plate and a placing plate, limiting rods are fixedly arranged on the two sides of the interior of the case, connecting blocks are fixedly arranged on the two sides, close to the rear ends, of the placing plate, a through hole is formed in the upper end of the placing plate, and the bearing plate is fixedly connected with the through hole. Magnetic attraction blocks are embedded in the two sides of the rear end face of the placement plate, clamping grooves are formed in the rear ends of the two magnetic attraction blocks correspondingly, containing grooves are formed in the two sides, close to the rear end, of the interior of the case correspondingly, fixing assemblies are fixedly arranged in the two containing grooves correspondingly, and a groove is formed in the middle of the inner bottom face of the case; a lower adsorption assembly is fixedly arranged in the middle of the inner bottom face of the groove and comprises a hydraulic rod, two baffles, two supporting rods and two second electric push rods. According to the utility model, the binding surface is more accurate when the glass is subjected to laminated processing, the problem of fragmentation caused by thermalization of the glass due to deviation is prevented, and the safety of glass processing is improved.
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Description

Technical Field

[0001] The utility model relates to the technical field of glass laminating machines, in particular to a glass laminating machine with high safety. Background Art

[0002] Glass laminating machine is a kind of equipment used to produce laminated glass. Laminated glass is made of two pieces of glass with a layer of transparent or colored plastic interlayer between them. This structure allows the glass to remain on the laminated film when it breaks, increasing the safety of the glass in use. This glass is widely used in construction, automobiles and other fields.

[0003] When the existing glass laminating machine is in use, the two pieces of glass to be made into laminated glass are cleaned, and then the interlayer material is placed between the two pieces of glass to heat and solidify. However, when the two pieces of glass are bonded together, it is easy to cause the glass to be inaccurately bonded, resulting in deviation of the bonding surface, making the glass easy to break when heated, posing certain safety hazards.

[0004] Therefore, the utility model provides a glass laminating machine with high safety to solve the problems raised in the above background technology. Utility Model Content

[0005] The utility model aims to solve the shortcomings of the prior art and proposes a glass laminating machine with high safety, which can prevent the glass from breaking due to displacement after heating during alignment processing, thereby improving the efficiency and success rate of glass processing.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a glass laminating machine with high safety, comprising a chassis, a bearing plate and a placement plate, both sides of the chassis are fixedly provided with limit rods, both sides of the placement plate are fixedly provided with connecting blocks near the rear end, a through hole is provided at the upper end of the placement plate, both sides of the rear end surface of the placement plate are embedded with magnetic blocks, the rear ends of the two magnetic blocks are respectively provided with card slots, both sides of the chassis near the rear end are provided with accommodating grooves, and fixing components are fixedly provided inside the two accommodating grooves, a groove is provided in the middle of the inner bottom surface of the chassis, and a lower adsorption component is fixedly provided in the middle of the inner bottom surface of the groove;

[0007] The lower adsorption assembly includes a hydraulic rod, two baffles, two support rods and two second electric push rods, the upper end of the hydraulic rod is fixedly provided with a second electric suction cup, the opposite sides of the two baffles are fixedly provided with protective covers, the insides of the two protective covers are fixedly provided with shock absorbers, the opposite sides of the two electric push rods are fixedly provided with extrusion rods, the upper ends of the two extrusion rods are fixedly provided with first bearing seats, and the lower end surfaces of the second electric suction cups are fixedly provided with second bearing seats on both sides;

[0008] The fixing assembly includes a telescopic rod, a return spring and two slide grooves, a moving plate is fixedly arranged at the front end of the telescopic rod, a clamping block is fixedly arranged at the middle of the front end surface of the moving plate, and sliders are fixedly arranged on both sides of the moving plate;

[0009] Through the above technical scheme, the limiting rods arranged inside the chassis facilitate the connection blocks at the rear ends of the two sides of the placement plate to slide around the limiting rods, so that the glass is placed in the chassis, so that the glass is placed on the bearing plate in the through hole of the placement plate, and the fixing component in the receiving groove fixes the placement plate, so that the placement plate puts the glass in one position, and the lower glass is adsorbed and fixed by the lower adsorption component in the groove, so that the glass is more stable during processing, and the bonding surface is more fixed during the heating process, thereby improving the yield rate of glass processing, and preventing errors from causing inaccurate glass bonding surfaces to cause breakage and safety hazards;

[0010] The second electric push rod arranged in the lower adsorption assembly drives the extrusion rod to slide inside the protective cover and squeezes the shock absorber inside the protective cover, so that the first bearing seat on the extrusion rod drives the support rod to rotate in the second bearing seat at the lower end of the second electric suction cup, so that the second electric suction cup and the hydraulic rod support are stably raised to adsorb and fix the glass, thereby preventing the glass from moving during thermal curing, and making the bonding surface more compact and supportive;

[0011] The sliding blocks on both sides of the movable plate are driven to slide in the slide groove by the telescopic rod arranged in the fixing assembly, and the card block is reset after being squeezed at the beginning by the reset spring around the telescopic rod, so that the card block is engaged with the card groove, which is convenient for fixing the placement plate. When the placement plate is placed in the chassis, the position is fixed so that the position where the glass enters is the same.

[0012] Furthermore, a vacuum machine is provided through the rear end of the chassis, and heaters are provided through the middle of both sides of the chassis;

[0013] Through the above technical solution, a vacuum machine is arranged at the rear end of the chassis to perform vacuum treatment when laminating the glasses, and then the laminating is heated by a heater to make the glasses tightly fit and fixed together.

[0014] Further, upper adsorption components are fixedly arranged on both sides of the inner top surface of the chassis, and the two upper adsorption components include two adsorption grooves, and the middle of the inner top surface of the two adsorption grooves is fixedly arranged with a first electric push rod, and the lower ends of the two electric push rods are fixedly arranged with a first electric suction cup;

[0015] Through the above technical scheme, through the upper adsorption components arranged on both sides of the inside of the chassis, the first electric push rod is fixed by the adsorption groove in the upper adsorption component, and the first electric push rod drives the first electric suction cup to descend to adsorb the upper glass, so as to facilitate the unification of the position of the lower glass and the upper glass.

[0016] Furthermore, the two extrusion rods are respectively slidably arranged inside the two protective sleeves, and the two support rods are respectively rotatably sleeved inside the two first bearing seats and the second bearing seat;

[0017] Through the above technical solution, the shock absorber is conveniently squeezed by setting the extrusion rod slidingly in the protective cover, making it more stable when adsorbing the lower glass. By setting it on the support rod, it is convenient to move and support the second electric suction cup when adsorbing.

[0018] Furthermore, the two clamping blocks are respectively clamped and arranged in the two clamping slots, and the two sliding blocks are respectively slidably arranged in the two sliding slots;

[0019] Through the above technical solution, by setting the card block to be connected in the card slot, it is more convenient to fix the placement plate, and by setting the slider to slide in the slide slot, the card block is more stable when moving.

[0020] Furthermore, the two connecting blocks are respectively slidably arranged around the two limiting rods, a handle is fixedly arranged at the front end of the placement plate, and a circular hole is opened in the middle of the upper end surface of the bearing plate;

[0021] Through the above technical scheme, by setting the connecting block slidingly around the limit rod, it is convenient to move the placement plate to transport the glass, the handle set at the front end of the placement plate is convenient to pull the placement plate, and the circular hole in the middle of the upper end surface of the supporting plate is convenient to adsorb the glass.

[0022] Furthermore, a sealing plate is provided through the middle of the front end surface of the chassis, handles are fixedly provided on both sides of the front end surface of the sealing plate, a controller is fixedly provided on one side of the chassis near the front end, a warning light is fixedly provided on the middle of the upper end surface of the chassis near the front end, and support columns are fixedly provided at the four corners of the lower end surface of the chassis;

[0023] Through the above technical scheme, the sealing plate arranged at the front end of the chassis facilitates the sealing process during glass processing, the handles arranged on both sides of the front end of the sealing plate facilitate the transportation of the sealing plate, the controller arranged on one side of the chassis facilitates the control of the first electric push rod, the second electric push rod, the heater, and the vacuum machine, the warning light arranged on the chassis facilitates the reminder of the personnel that processing is being carried out inside the chassis, and the support columns arranged at the four corners of the lower end face of the chassis improve the support of the chassis.

[0024] The utility model has the following beneficial effects:

[0025] 1. The utility model provides a glass laminating machine with high safety. The groove is arranged on the bottom surface of the box body, so that the second electric push rod in the lower adsorption assembly inside the groove drives the extrusion rod to slide in the protective cover, and squeezes the shock absorber in the protective cover, so that the support rod of the first bearing seat at the upper end of the extrusion rod rotates in the second bearing seat at the lower end of the second electric suction cup, and the lower layer of glass is adsorbed and fixed when the glass is laminated, and the upper layer of glass is adsorbed and fixed by the upper adsorption assembly, so that it is not easy to deviate when the glass is laminated, and it is convenient for the glass to be more tightly attached to the adhesive layer, improve the processing efficiency, prevent displacement after heating, and prevent the danger of glass shattering due to misalignment between the glasses, so that the glass is safer when it is laminated.

[0026] 2. The utility model provides a glass laminating machine with high safety. The accommodating groove is provided on the rear end surface of the chassis, so that the telescopic rod inside the accommodating groove drives the sliders on both sides of the moving plate to slide in the sliding groove, and the clamping block at the front end of the moving plate is clamped with the clamping grooves provided by the magnetic blocks on both sides of the rear end of the placement plate. The clamping block is made of magnetic material, so that the placement plate is fixed when it is placed in the chassis, so that the laminating surface of the glass is prevented from deviating when the adhesive layer is extruded and hot processed, and the defective products are prevented when the glass is processed. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the axial side of the utility model;

[0028] Figure 2 It is a top cross-sectional schematic diagram of the utility model;

[0029] Figure 3 It is a front cross-sectional schematic diagram of the utility model;

[0030] Figure 4 It is an enlarged schematic diagram of point A of the utility model;

[0031] Figure 5 It is an enlarged schematic diagram of point B of the present utility model.

[0032] Legend:

[0033] 1. Chassis; 2. Vacuum machine; 3. Heater; 4. Controller; 5. Sealing plate; 6. Card slot; 7. Handle; 8. Warning light; 9. Support column; 10. Receiving slot; 11. Fixing assembly; 12. Limit rod; 13. Placement plate; 14. Connecting block; 15. Loading plate; 16. Through hole; 17. Round hole; 18. Handle; 19. Upper adsorption assembly; 20. Groove; 21. Lower adsorption assembly; 22. Magnetic block; 1101. Telescopic rod; 1102. Reset spring; 1 103, moving plate; 1104, slide groove; 1105, slider; 1106, block; 1901, adsorption groove; 1902, first electric push rod; 1903, first electric suction cup; 2101, second electric suction cup; 2102, hydraulic rod; 2103, baffle; 2104, shock absorber; 2105, protective cover; 2106, extrusion rod; 2107, second electric push rod; 2108, first bearing seat; 2109, support rod; 2110, second bearing seat. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] Reference Figure 1-5, The utility model provides an embodiment: a glass laminating machine with high safety, including a chassis 1, a bearing plate 15 and a placement plate 13, both sides of the chassis 1 are fixedly provided with limit rods 12, both sides of the placement plate 13 are fixedly provided with connecting blocks 14 near the rear end, the upper end of the placement plate 13 is provided with a through hole 16, both sides of the rear end surface of the placement plate 13 are embedded with magnetic blocks 22, and the rear ends of the two magnetic blocks 22 are respectively provided with card slots 6, both sides of the chassis 1 near the rear end are provided with accommodating grooves 10, and the two accommodating grooves 10 are fixedly provided with fixing components 11, the middle part of the inner bottom surface of the chassis 1 is provided with a groove 20, and the middle part of the inner bottom surface of the groove 20 is fixedly provided with a lower adsorption component 21, through the above technical scheme, The limiting rod 12 arranged inside the chassis 1 facilitates the connecting blocks 14 on both sides of the placement plate 13 near the rear end to slide around the limiting rod 12, so that the glass can be placed in the chassis 1, so that the glass is placed on the supporting plate 15 in the through hole 16 opened in the placement plate 13, and the fixing component 11 in the accommodating groove 10 fixes the placement plate 13, so that the placement plate 13 puts the glass in one position, and the lower layer of glass is adsorbed and fixed by the lower adsorption component 21 in the groove 20, so that the glass is more stable during processing, and the bonding surface is more fixed during the heating process, thereby improving the yield rate of glass processing, and preventing errors from causing inaccurate bonding surfaces of the glass, resulting in breakage and safety hazards.

[0036] The lower adsorption assembly 21 includes a hydraulic rod 2102, two baffles 2103, two support rods 2109 and two second electric push rods 2107. The upper end of the hydraulic rod 2102 is fixedly provided with a second electric suction cup 2101. The opposite sides of the two baffles 2103 are fixedly provided with protective covers 2105. The insides of the two protective covers 2105 are fixedly provided with shock absorbers 2104. The opposite sides of the two electric push rods are fixedly provided with extrusion rods 2106. The upper ends of the two extrusion rods 2106 are fixedly provided with first bearing seats 2108. The lower end surfaces of the second electric suction cup 2101 are fixedly provided with second bearing seats 2109. 10. The second electric push rod 2107 arranged in the lower adsorption component 21 drives the extrusion rod 2106 to slide inside the protective cover 2105, and squeezes the shock absorber 2104 inside the protective cover 2105, so that the first bearing seat 2108 on the extrusion rod 2106 drives the support rod 2109 to rotate in the second bearing seat 2110 at the lower end of the second electric suction cup 2101, so that the second electric suction cup 2101 and the hydraulic rod 2102 support and stably rise to adsorb and fix the glass, prevent the glass from moving during thermal curing, and make the fitting surface tighter and more supportive.

[0037] The fixing component 11 includes a telescopic rod 1101, a reset spring 1102 and two slide grooves 1104. A moving plate 1103 is fixedly provided at the front end of the telescopic rod 1101. A clamping block 1106 is fixedly provided in the middle of the front end surface of the moving plate 1103. Slide blocks 1105 are fixedly provided on both sides of the moving plate 1103. The telescopic rod 1101 arranged in the fixing component 11 drives the slide blocks 1105 on both sides of the moving plate 1103 to slide in the slide groove 1104, and the clamping block 1106 is reset after being squeezed at the beginning by the reset spring 1102 around the telescopic rod 1101, so that the clamping block 1106 is clamped with the clamping slot 6, so as to facilitate the fixing of the placement plate 13, so that the placement plate 13 is fixed in position when being placed in the chassis 1 so that the position where the glass enters is at the same position.

[0038] A vacuum machine 2 is provided at the rear end of the chassis 1, and heaters 3 are provided at the middle of both sides of the chassis 1. The vacuum machine 2 provided at the rear end of the chassis 1 is used to perform vacuum treatment when the laminated glass is bonded together, and then the laminated glass is heated by the heater 3 to make the glass tightly bonded and fixed together.

[0039] Upper adsorption components 19 are fixedly provided on both sides of the inner top surface of the chassis 1, and the two upper adsorption components 19 include two adsorption grooves 1901. A first electric push rod 1902 is fixedly provided in the middle of the inner top surface of the two adsorption grooves 1901, and a first electric suction cup 1903 is fixedly provided at the lower end of the two electric push rods. By means of the upper adsorption components 19 arranged on both sides of the interior of the chassis 1, the first electric push rod 1902 is fixedly provided through the adsorption grooves 1901 in the upper adsorption components 19, and the first electric suction cup 1903 is driven to descend by the first electric push rod 1902 to adsorb the upper glass, which facilitates the unification of the positions of the lower glass and the upper glass, and is not easy to cause deviation and glass breakage during heating.

[0040] The two extrusion rods 2106 are respectively slidably arranged inside the two protective covers 2105, and the two support rods 2109 are respectively rotatably arranged inside the two first bearing seats 2108 and the second bearing seats 2110. By arranging the extrusion rods 2106 to be slidably arranged inside the protective covers 2105, it is convenient to extrude the shock absorber 2104, so that it is more stable when adsorbing the lower glass. By arranging them on the support rods 2109, it is convenient to move and support the second electric suction cup 2101 during adsorption, so that the lower glass is not easily displaced when being fitted with the upper glass, and the position of the lower glass is fixed and will not move.

[0041] The two clamping blocks 1106 are respectively clamped in the two clamping slots 6, and the two sliders 1105 are respectively slidably set in the two slide slots 1104. By setting the clamping blocks 1106 to be clamped in the clamping slots 6, it is more convenient to fix the placement plate 13. By setting the sliders 1105 to slide in the slide slots 1104, the clamping blocks 1106 are more stable when moving. The two connecting blocks 14 are respectively slidably set around the two limit rods 12, and the front end of the placement plate 13 is fixedly provided with a handle 18 A circular hole 17 is provided in the middle of the upper end surface of the carrying plate 15, which is slidably arranged on the connecting block 14 around the limiting rod 12, so that the placing plate 13 can be moved to transport the glass. The handle 18 arranged at the front end of the placing plate 13 is convenient for pulling the placing plate 13. The circular hole 17 in the middle of the upper end surface of the carrying plate 15 facilitates the adsorption of the glass, so that the lower glass can be stably fixed and supported on the carrying plate 15 when it is placed, so that the upper glass and the lower glass can be closely fitted for thermal treatment.

[0042] A sealing plate 5 is provided through the middle of the front end face of the chassis 1, and handles 7 are fixedly provided on both sides of the front end face of the sealing plate 5. A controller 4 is fixedly provided on one side of the chassis 1 near the front end, a warning light 8 is fixedly provided on the middle of the upper end face of the chassis 1 near the front end, and support columns 9 are fixedly provided on the four corners of the lower end face of the chassis 1. The sealing plate 5 provided at the front end of the chassis 1 is convenient for sealing during glass processing, and the handles 7 provided on both sides of the front end of the sealing plate 5 are convenient for carrying the sealing plate 5. The controller 4 provided on one side of the chassis 1 is convenient for controlling the first electric push rod 1902, the second electric push rod 2107, the heater 3, and the vacuum machine 2. The warning light 8 provided on the chassis 1 is convenient for reminding personnel that processing is being carried out inside the chassis 1. The support of the chassis 1 is improved by providing the support columns 9 at the four corners of the lower end face of the chassis 1.

[0043] Working principle: take down the sealing plate 5 in front of the chassis 1, slide the connecting blocks 14 on both sides of the placement plate 13 around the limit rod 12 through the handle 18, put the upper glass on the supporting plate 15 inside the through hole 16, put it into the chassis 1, and fix the upper glass by the upper adsorption component 19, then put the lower glass and the interlayer material on the lower glass, so that the lower glass is placed in the chassis 1, and fix the placement plate 13 by the fixing component 11 when the upper and lower glasses are put in, so that the upper and lower glasses are not easy to deviate when they are fitted together, and prevent them from being broken during the thermal processing process to cause safety hazards, and perform vacuum treatment on the glass through the vacuum machine 2, so that the upper adsorption component 19 drives the upper glass to fit with the lower glass, and the lower adsorption component 21 fixes the lower glass, and the heater 3 performs thermal treatment on it.

[0044] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A glass laminating machine with high safety, comprising a chassis (1), a bearing plate (15) and a placement plate (13), characterized in that: Limit rods (12) are fixedly arranged on both sides of the chassis (1), connecting blocks (14) are fixedly arranged on both sides of the placement plate (13) near the rear end, a through hole (16) is provided at the upper end of the placement plate (13), magnetic blocks (22) are embedded on both sides of the rear end surface of the placement plate (13), and the rear ends of the two magnetic blocks (22) are respectively provided with card slots (6), the chassis (1) is provided with accommodating grooves (10) on both sides of the rear end, and the two accommodating grooves (10) are fixedly arranged with fixing components (11), the chassis (1) is provided with a groove (20) in the middle of the inner bottom surface, and a lower adsorption component (21) is fixedly arranged in the middle of the inner bottom surface of the groove (20); The lower adsorption assembly (21) comprises a hydraulic rod (2102), two baffles (2103), two support rods (2109) and two second electric push rods (2107); a second electric suction cup (2101) is fixedly arranged on the upper end of the hydraulic rod (2102); protective sleeves (2105) are fixedly arranged on opposite sides of the two baffles (2103); shock absorbers (2104) are fixedly arranged inside the two protective sleeves (2105); extrusion rods (2106) are fixedly arranged on opposite sides of the two electric push rods; first bearing seats (2108) are fixedly arranged on the upper ends of the two extrusion rods (2106); and second bearing seats (2110) are fixedly arranged on both sides of the lower end surface of the second electric suction cup (2101); The fixing assembly (11) comprises a telescopic rod (1101), a return spring (1102) and two slide grooves (1104); a moving plate (1103) is fixedly arranged at the front end of the telescopic rod (1101); a clamping block (1106) is fixedly arranged at the middle of the front end surface of the moving plate (1103); and sliding blocks (1105) are fixedly arranged on both sides of the moving plate (1103).

2. A glass laminating machine with high safety according to claim 1, characterized in that: A vacuum machine (2) is provided through the rear end of the chassis (1), and heaters (3) are provided through the middle of both sides of the chassis (1).

3. The glass laminating machine with high safety according to claim 1, characterized in that: Upper adsorption components (19) are fixedly arranged on both sides of the inner top surface of the chassis (1), and the two upper adsorption components (19) include two adsorption grooves (1901). A first electric push rod (1902) is fixedly arranged in the middle of the inner top surface of the two adsorption grooves (1901), and a first electric suction cup (1903) is fixedly arranged at the lower end of the two electric push rods.

4. The glass laminating machine with high safety according to claim 1, characterized in that: The two extrusion rods (2106) are respectively slidably arranged inside the two protective sleeves (2105), and the two support rods (2109) are respectively rotatably arranged inside the two first bearing seats (2108) and the second bearing seat (2110).

5. The glass laminating machine with high safety according to claim 1, characterized in that: The two clamping blocks (1106) are respectively clamped and arranged inside the two clamping grooves (6), and the two sliding blocks (1105) are respectively slidably arranged inside the two sliding grooves (1104).

6. The glass laminating machine with high safety according to claim 1, characterized in that: The two connecting blocks (14) are respectively slidably arranged around the two limiting rods (12); a handle (18) is fixedly arranged at the front end of the placement plate (13); and a circular hole (17) is opened in the middle of the upper end surface of the carrying plate (15).

7. The glass laminating machine with high safety according to claim 1, characterized in that: A sealing plate (5) is provided through the middle of the front end surface of the chassis (1), handles (7) are fixedly provided on both sides of the front end surface of the sealing plate (5), a controller (4) is fixedly provided on one side of the chassis (1) near the front end, a warning light (8) is fixedly provided on the middle of the upper end surface of the chassis (1) near the front end, and support columns (9) are fixedly provided on the four corners of the lower end surface of the chassis (1).