A clothing printing device with double-sided printing heads

Abstract

The present invention discloses a clothing printing device with a double-sided printing head, and relates to the technical field of clothing printing. The present invention comprises a frame, the frame is arranged on the back of a clothing conveying line body, the frame is hinged with multiple groups of swing arms inside, a fixed installation component and an adjustable installation component are arranged at the bottom of the swing arm, a printing box is fixedly installed between the fixed installation component and the adjustable installation component, and a printing component is fixedly installed at the bottom of the linear slide rail module. The present invention arranges two groups of fixed scrapers and sliding scrapers. When the rear fixed scraper and the sliding scraper are scraped, the front fixed scraper sprays ink, and the front sliding scraper pushes the ink at the edge to the printing area, and then a certain distance is formed between the front sliding scraper and the printing area, so that the ink can be scraped flat, so that the ink scraped off last time can be spread evenly to the entire printing area, which can effectively prevent ink accumulation and improve ink utilization.

Description

Technical Field

[0001] The invention relates to the technical field of clothing printing, and in particular to a clothing printing device with a double-sided printing head. Background Art

[0002] Garment printing is a garment making process. The first step is to dye the fabric into a single color, and the second step is to print the pattern on the fabric. The printing paste in the second step contains a strong bleaching agent that can destroy the base dye, so this method can produce a blue-bottomed white dot patterned fabric. This process is called whitening.

[0003] The invention patent with authorization announcement number CN111204117B discloses a clothing production printing device, including a conveyor frame, a printing table, a loading unit, a unloading unit, a printing unit and a drying unit. The printing unit includes a frame, a screen frame horizontally arranged on the frame and a printing arm fixedly installed on the top of the frame, and also includes a screen frame fixing mechanism for fixing the screen frame, a screen frame driving mechanism for driving the screen frame fixing mechanism to move up and down, a scraper mechanism arranged on the printing arm and a scraping driving mechanism for driving the scraper mechanism to reciprocate along the length direction of the printing arm. This printing device and the existing printing device both use a scraper to repeatedly scrape and print on the printing area. In the actual printing process, the amount of ink sprayed must be more than the amount used for printing to ensure the printing quality, which causes excess ink to be scraped to the edge of the printing area. As the printing area is printed multiple times, more and more ink is stacked, and it is necessary to stop the machine to remove the ink, which not only affects the printing efficiency, but also causes ink waste. At the same time, when printing large areas or complex patterns, multiple printings are required to form multiple printing layers to ensure that the ink coverage is complete and the effect is good. This device and the existing technology usually require the scraper to be reset after scraping once before the next scraping, and the printing efficiency is low. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems and provide a clothing printing device with a double-sided printing head.

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0006] A clothing printing device with a double-sided printing head comprises a frame, the frame is arranged on the back of a clothing conveying line body, a plurality of swing rods are hinged inside the frame, the swing rods can swing up and down, a fixed installation component and an adjustable installation component are arranged at the bottom of the swing rod, and a printing box is fixedly installed between the fixed installation component and the adjustable installation component;

[0007] A linear slide module is fixedly installed at the bottom of the swing arm, and a printing component is fixedly installed at the bottom of the linear slide module. The printing component includes a mounting plate fixedly installed at the bottom of the linear slide module, and four groups of lifting cylinders are fixedly installed on the top of the mounting plate. A lifting frame is fixedly installed at the bottom of the telescopic ends of the two groups of lifting cylinders on the same side, and a fixed scraper is fixedly installed at the bottom of the lifting frame. A material buffering distance is set between the two groups of fixed scrapers. Multiple groups of spray holes are opened at the bottom of the fixed scraper, and a sliding scraper is set on the outer side of the lifting frame. The sliding scraper can be raised and lowered, and a liquid distributor is fixedly installed on the top of the mounting plate, and the liquid distributor is connected with the spray hole through a conduit.

[0008] Furthermore, a plurality of groups of telescopic cylinders are hinged inside the frame, and a pull rod is fixedly installed at the telescopic end of the telescopic cylinder, and the pull rod is hinged at the top of the swing arm.

[0009] Further, the fixed installation component includes a fixed plate fixedly installed on the front end of the rocker arm, a guide sleeve 1 is fixedly installed on the bottom of the fixed plate, a mounting frame 1 is plugged into the bottom of the guide sleeve 1, and the adjustable installation component includes a slide bracket slidably connected to the bottom of the rocker arm, a locking rod 1 is threadedly connected to the outer side of the slide bracket, a guide sleeve 2 is fixedly installed on the bottom of the slide bracket, a mounting frame 2 is plugged into the bottom of the guide sleeve 2, and the insides of the guide sleeve 1 and the guide sleeve 2 are both threadedly connected to the locking rod 2.

[0010] Furthermore, the corresponding surfaces of the mounting frame 1 and the mounting frame 2 are provided with positioning holes and threaded holes, the internal threads of the threaded holes are connected with connecting screws, positioning columns are provided at both ends of the printing box, the positioning columns can be inserted into the positioning holes, and installation threaded holes are provided at both ends of the printing box, and the connecting screws can be threadedly connected in the installation threaded holes.

[0011] Furthermore, a scale is arranged on the outer side of the swing rod.

[0012] Furthermore, a side guide frame is fixedly installed on one side in the middle of the principle mounting plate of the lifting frame, the sliding scraper is slidably connected to the outer side of the side guide frame, a top spring is arranged between the sliding scrapers, elastic connecting rods are arranged at both ends of the sliding scraper, a guide column is fixedly installed at one end of the elastic connecting rod away from the sliding scraper, guide strips are fixedly installed on both sides of the top of the printing box, both ends of the guide strips are inclined, the length of the guide strips is less than the inner length of the printing box, and the length of the guide strips is greater than the printing length.

[0013] Furthermore, a sliding bar is arranged on one side of the sliding scraper close to the lifting frame, a sliding groove is provided inside the side guide frame, and the sliding bar is slidably connected in the sliding groove.

[0014] Furthermore, two sets of connecting sleeves are arranged on the top of the lifting frame, and the telescopic end of the lifting cylinder can be inserted into the connecting sleeve, and the outer side of the connecting sleeve is threadedly connected with a locking rod three.

[0015] The beneficial effects of the present invention are as follows:

[0016] The present invention arranges the device on the clothing conveying line body, and arranges multiple groups of the device, so that a plurality of single-color clothing can be printed at one time, and the clothing can also be printed with multiple colors in sequence, and the application range is wide.

[0017] The present invention can perform double-plate scraping on the print by setting a fixed scraper and a sliding scraper. The double scrapers can effectively ensure that the ink is evenly coated on the screen and reduce the uneven flow of the ink. It is particularly suitable for some designs that require detail expression or color transition. With the assistance of the second scraper, the clarity of fine lines and small patterns can be enhanced, making the patterns more delicate and precise, avoiding the omission or blurring that may be caused by a single scraper.

[0018] The present invention arranges two groups of fixed scrapers and sliding scrapers. When the rear fixed scraper and the sliding scraper are scraping, the front fixed scraper sprays out ink, and the front sliding scraper pushes the ink at the edge to the printing area. Then a certain distance is formed between the front sliding scraper and the printing area, so that the ink can be scraped flat, so that the ink scraped off last time can be spread evenly on the entire printing area, which can effectively prevent ink accumulation and improve ink utilization.

[0019] The present invention can perform multiple printings continuously by switching between the front fixed scraper and the rear fixed scraper without resetting, and has high printing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of a single printing device of the present invention;

[0022] Figure 3 is an exploded view of a single printing device of the present invention;

[0023] Figure 4 is an exploded view of the printing assembly of the present invention;

[0024] Figure 5 It is a schematic diagram of the three-dimensional structure of the lifting frame of the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the sliding scraper of the present invention.

[0026] Figure markings: 1. frame; 2. rocker arm; 21. linear slide rail module; 22. scale; 3. telescopic cylinder; 4. pull rod; 5. fixed installation assembly; 51. fixed plate; 52. guide sleeve one; 53. mounting frame one; 6. adjustable installation assembly; 61. slide frame; 62. guide sleeve two; 63. mounting frame two; 7. printing box; 71. guide strip; 72. mounting threaded hole; 73. positioning column; 8. printing assembly; 81. mounting plate; 82. lifting cylinder; 83. dispenser; 84. conduit; 85. lifting frame; 86. connecting sleeve; 87. side guide frame; 88. fixed scraper; 881. spray hole; 89. sliding scraper; 810. top spring; 811. guide column; 812. elastic connecting rod. DETAILED DESCRIPTION

[0027] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0028] Embodiment 1, as Figure 1-Figure 6 As shown, a clothing printing device with a double-sided printing head includes a frame 1, the frame 1 is arranged on the back of the clothing conveying line body, and multiple groups of swing rods 2 are hinged inside the frame 1. The swing rods 2 can swing up and down. A fixed installation component 5 and an adjustable installation component 6 are arranged at the bottom of the swing rod 2, and a printing box 7 is fixedly installed between the fixed installation component 5 and the adjustable installation component 6;

[0029] A linear slide module 21 is fixedly installed at the bottom of the swing arm 2, and a printing component 8 is fixedly installed at the bottom of the linear slide module 21. The printing component 8 includes a mounting plate 81 fixedly installed at the bottom of the linear slide module 21, and four groups of lifting cylinders 82 are fixedly installed on the top of the mounting plate 81. A lifting frame 85 is fixedly installed at the bottom of the telescopic ends of the two groups of lifting cylinders 82 on the same side, and a fixed scraper 88 is fixedly installed at the bottom of the lifting frame 85. A buffering distance is set between the two groups of fixed scrapers 88. Multiple groups of spray holes 881 are opened at the bottom of the fixed scraper 88. A sliding scraper 89 is set on the outer side of the lifting frame 85, and the sliding scraper 89 can be raised and lowered. A liquid distributor 83 is fixedly installed on the top of the mounting plate 81, and the liquid distributor 83 is connected with the spray hole 881 through a conduit 84.

[0030] The clothing conveying line conveys the clothing to the bottom of the printing box 7, and then the swing rod 2 drives the printing box 7 to swing downward, and the printing box 7 is pressed on the clothing. There is a layer of ink on the printing area of ​​the printing box 7. At this time, the fixed scraper 88 at the front end maintains a high distance from the printing area, and the sliding scraper 89 at the front end maintains a certain distance from the printing area. The distance is the ink thickness. The fixed scraper 88 and the sliding scraper 89 at the rear end are both lowered to the printing area, and the nozzle 881 on the fixed scraper 88 at the front end sprays ink. The linear slide rail module 21 drives the mounting plate 81 to move backward, and the fixed scraper 88 and the sliding scraper 89 at the rear end scrape the ink onto the clothing. The double-plate scraping can effectively ensure that the ink is evenly coated on the screen and reduce the uneven flow of ink. It is particularly suitable for some designs that require detail expression or color transition. With the assistance of the second scraper, the clarity of fine lines and small patterns can be enhanced, making the patterns more delicate and precise, avoiding the omission or blurring that may be caused by a single scraper. At the same time, the nozzle 881 on the front fixed scraper 88 sprays ink, and the ink is sprayed on the printing area. The sliding scraper 89 at the front end flattens the ink. After scraping and pressing, the latter group of ink is covered, and by setting the buffer spacing, the sprayed ink will not affect the scraping and pressing. After the rear fixed scraper 88 and the rear sliding scraper 89 exceed the printing area, the lifting cylinder 82 drives the rear lifting frame 85 to rise, and the rear fixed scraper 88 and the rear sliding scraper 89 maintain a certain vertical distance from the printing area, and then the mounting plate 81 continues to move backward. When the ink completely covers the printing area, the printing assembly 8 continues to move backward for a short distance, so that the front sliding scraper 89 exceeds the printing area. At this time, the excess scraped ink is located in the buffering distance, and then the rear fixed scraper 88 maintains a high distance from the printing area, and the rear sliding scraper 89 is attached to the bottom of the printing box 7. The front fixed scraper 88 and the front The end sliding scrapers 89 are all lowered to the printing area, and the linear slide rail module 21 drives the mounting plate 81 to move forward. The front fixed scraper 88 and the front sliding scraper 89 perform double-plate scraping on the ink, and the rear sliding scraper 89 brings the excess ink scraped off last time to the printing area. Then the rear sliding scraper 89 rises a short distance, which is the ink thickness. At the same time, the nozzle 881 on the rear fixed scraper 88 sprays ink, and the ink covers the printing area again, and the rear sliding scraper 89 evenly scrapes the last ink and the sprayed ink on the printing area. It should be noted that in this embodiment, the lifting drive source of the sliding scraper 89 adopts a cylinder;

[0031] In summary, the printing logic of the present invention is that one set of fixed scrapers 88 sprays ink and scrapes it flat, and the other set of fixed scrapers 88 performs double-plate scraping printing, and can scrape back the excess ink at the edge for repeated use. Therefore, the present invention drives the printing assembly 8 to move back and forth through the linear slide rail module 21, and can continuously perform ink spraying and scraping printing, with high processing efficiency, suitable for printing large areas or complex patterns, and can quickly complete multi-layer scraping printing. At the same time, it can repeatedly scrape the excess ink back to the printing area, and the printing box 7 will not accumulate ink, and will not cause ink waste;

[0032] The invention arranges a plurality of printing devices on the conveyor belt, so a plurality of single-color garments can be printed at one time, and multi-color garments can also be printed sequentially, and has a wide application range.

[0033] Embodiment 2, based on the above embodiment, further includes: a plurality of telescopic cylinders 3 are hingedly connected inside the frame 1 , and a pull rod 4 is fixedly installed at the telescopic end of the telescopic cylinder 3 , and the pull rod 4 is hinged at the top of the swing arm 2 .

[0034] By controlling the telescopic cylinder 3 to extend and retract, the telescopic cylinder 3 drives the swing rod 2 to swing up and down through the pull rod 4, and the control is stable and simple.

[0035] Embodiment 3, based on the above embodiment, provides a structure of a fixed installation component 5 and an adjustable installation component 6;

[0036] like Figure 2 , Figure 3 As shown, the fixed installation component 5 includes a fixed plate 51 fixedly installed on the front end of the rocker arm 2, a guide sleeve 52 is fixedly installed on the bottom of the fixed plate 51, a mounting frame 53 is plugged into the bottom of the guide sleeve 52, and the adjustable installation component 6 includes a slide 61 slidably connected to the bottom of the rocker arm 2, a locking rod 1 is threadedly connected to the outer side of the slide 61, a guide sleeve 2 62 is fixedly installed on the bottom of the slide 61, a mounting frame 2 63 is plugged into the bottom of the guide sleeve 2 62, and the insides of the guide sleeve 1 52 and the guide sleeve 2 62 are both threadedly connected to the locking rod 2.

[0037] Furthermore, a scale 22 is provided on the outer side of the rocker 2 .

[0038] The scale 22 is installed to move the slide 61, and the distance between the slide 61 and the fixed plate 51 is adjusted, so that print boxes 7 of different specifications can be fixed. At the same time, by adjusting the mounting frame 1 53 and the mounting frame 2 63 up and down, the distance between the print box 7 and the swing rod 2 can be adjusted, and then the distance between the print box 7 and the clothing can be adjusted. It is suitable for printing different clothing, and through the setting of the locking rod 1 and the locking rod 2, the slide 61 and the mounting frame 1 53 and the mounting frame 2 63 can be quickly fixed.

[0039] Embodiment 4, based on the above embodiment, further includes that the corresponding surfaces of the mounting frame 1 53 and the mounting frame 2 63 are provided with positioning holes and threaded holes, the internal threads of the threaded holes are connected with connecting screws, positioning columns 73 are provided at both ends of the print box 7, the positioning columns 73 can be inserted into the positioning holes, and mounting threaded holes 72 are provided at both ends of the print box 7, and the connecting screws can be threadedly connected in the mounting threaded holes 72.

[0040] Through this design, the printing box 7 can be quickly disassembled and assembled.

[0041] Embodiment 5, based on the above embodiment, provides a control structure of a sliding scraper 89;

[0042] like Figure 2-Figure 6 As shown, a side guide frame 87 is fixedly installed on one side in the middle of the principle mounting plate 81 of the lifting frame 85, a sliding scraper 89 is slidably connected to the outer side of the side guide frame 87, a top spring 810 is arranged between the sliding scraper 89, elastic connecting rods 812 are arranged at both ends of the sliding scraper 89, a guide column 811 is fixedly installed at one end of the elastic connecting rod 812 away from the sliding scraper 89, guide strips 71 are fixedly installed on both sides of the top of the printing box 7, both ends of the guide strips 71 are inclined, the length of the guide strips 71 is less than the inner length of the printing box 7, and the length of the guide strips 71 is greater than the printing length.

[0043] Furthermore, a sliding bar is provided on one side of the sliding scraper 89 close to the lifting frame 85 , and a sliding groove is provided inside the side guide frame 87 , in which the sliding bar is slidably connected.

[0044] When the rear fixed scraper 88 and the rear sliding scraper 89 exceed the printing area, the lifting cylinder 82 drives the rear lifting frame 85 to rise, and the rear fixed scraper 88 and the rear sliding scraper 89 of the lifting frame 85 are on the rear fixed scraper 88 and the rear sliding scraper 89, and the rear sliding scraper 89 drives the guide column 811 away from the guide bar 71, and the rear sliding scraper 89 maintains a certain vertical distance from the printing area and stays away from the ink, and then the mounting plate 81 continues to move backward. When the ink completely covers the printing area, the printing component 8 continues to move backward a short distance, so that the front sliding scraper 89 exceeds the printing area. The ink scraped out of the printing box 7 is located in the buffering distance. Then the lifting cylinder 82 drives the fixed scraper 88 and the sliding scraper 89 at the rear end to descend. The fixed scraper 88 at the rear end maintains the inkjet distance with the printing area. The sliding scraper 89 at the rear end drives the guide column 811 to press on the top of the printing box 7 under the action of the top spring 810. The sliding scraper 89 at the rear end is attached to the bottom of the printing box 7. The front lifting cylinder 82 drives the front lifting frame 85 to descend. The front lifting frame 85 drives the fixed scraper 88 at the front end to descend. The fixed scraper 88 at the front end first drives the sliding scraper The guide post 811 on the plate 89 presses on the printing box 7, and the front fixed scraper 88 continues to descend to compress the top spring 810. When the fixed scraper 88 descends to the printing area, the compression elastic force of the top spring 810 is greater than the elastic force of the elastic connecting rod 812, and the front fixed scraper 88 and the front sliding scraper 89 contact the printing area at the same time. The linear slide module 21 drives the mounting plate 81 to move forward, and the front fixed scraper 88 and the front sliding scraper 89 perform double-plate scraping on the ink. The rear sliding scraper 89 brings the excess ink scraped off last time to the printing area, and then The guide post 811 on the end sliding scraper 89 moves to the position of the guide strip 71, and the guide post 811 pushes the rear end sliding scraper 89 to rise a short distance, which is the thickness of the ink. At the same time, the nozzle 881 on the rear end fixed scraper 88 sprays ink, and the ink covers the printing area again, and the rear end sliding scraper 89 scrapes the last ink and the sprayed ink evenly on the printing area. Through the setting of this embodiment, there is no need to separately control the lifting and lowering of the sliding scraper 89. The control effect can be achieved through the simple setting of the top spring 810 and the guide strip 71, and the control is simpler.

[0045] Embodiment 6, based on the above embodiment, further includes that two sets of connecting sleeves 86 are arranged on the top of the lifting frame 85, the telescopic end of the lifting cylinder 82 can be inserted into the connecting sleeve 86, and the outer side of the connecting sleeve 86 is threadedly connected with a locking rod three.

[0046] Through the arrangement of this embodiment, it is easy to disassemble the lifting frame 85 and replace it. At the same time, there is no need to adjust the stroke of the lifting cylinder 82 to achieve the adjustment of the ink scraping distance, which is convenient to adjust.

[0047] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A clothing printing device with a double-sided printing head, comprising a frame (1), characterized in that: The frame (1) is arranged on the back of the garment conveyor line, and a plurality of sets of swing rods (2) are hingedly connected inside the frame (1), and the swing rods (2) can swing up and down, and a fixed installation component (5) and an adjustable installation component (6) are arranged at the bottom of the swing rods (2), and a printing box (7) is fixedly installed between the fixed installation component (5) and the adjustable installation component (6); A linear guide rail module (21) is fixedly mounted on the bottom of the swing arm (2), a printing assembly (8) is fixedly mounted on the bottom of the linear guide rail module (21), the printing assembly (8) comprises a mounting plate (81) fixedly mounted on the bottom of the linear guide rail module (21), four groups of lifting cylinders (82) are fixedly mounted on the top of the mounting plate (81), a lifting frame (85) is fixedly mounted on the bottom of the telescopic ends of the two groups of lifting cylinders (82) on the same side, a fixed scraper (88) is fixedly mounted on the bottom of the lifting frame (85), a material buffering distance is provided between the two groups of fixed scrapers (88), a plurality of spray holes (881) are provided at the bottom of the fixed scraper (88), a sliding scraper (89) is provided on the outer side of the lifting frame (85), and the sliding scraper (89) can be raised and lowered, a liquid distributor (83) is fixedly mounted on the top of the mounting plate (81), and the liquid distributor (83) is connected to the spray hole (881) through a conduit (84); The fixed installation component (5) comprises a fixed plate (51) fixedly installed at the front end of the rocker (2); a guide sleeve (52) is fixedly installed at the bottom of the fixed plate (51); a mounting frame (53) is plugged into the bottom of the guide sleeve (52); the adjustable installation component (6) comprises a slide frame (61) slidably connected to the bottom of the rocker (2); a locking rod (1) is threadedly connected to the outer side of the slide frame (61); a guide sleeve (62) is fixedly installed at the bottom of the slide frame (61); a mounting frame (63) is plugged into the bottom of the guide sleeve (62); the insides of the guide sleeve (52) and the guide sleeve (62) are both threadedly connected to the locking rod (2); the lifting frame (85) is away from the installation A side guide frame (87) is fixedly mounted on one side in the middle of the mounting plate (81); the sliding scraper (89) is slidably connected to the outer side of the side guide frame (87); a top spring (810) is arranged between the sliding scraper (89); elastic connecting rods (812) are arranged at both ends of the sliding scraper (89); a guide column (811) is fixedly mounted on one end of the elastic connecting rod (812) away from the sliding scraper (89); guide strips (71) are fixedly mounted on both sides of the top of the printing box (7); the two ends of the guide strips (71) are inclined; the length of the guide strips (71) is less than the inner length of the printing box (7); and the length of the guide strips (71) is greater than the printing length.

2. A clothing printing device with a double-sided printing head according to claim 1, characterized in that: The frame (1) is internally hinged with a plurality of groups of telescopic cylinders (3), and a pull rod (4) is fixedly mounted on the telescopic end of the telescopic cylinder (3), and the pull rod (4) is hinged on the top of the swing rod (2).

3. A clothing printing device with a double-sided printing head according to claim 1, characterized in that: The corresponding surfaces of the mounting frame 1 (53) and the mounting frame 2 (63) are provided with positioning holes and threaded holes, the internal threads of the threaded holes are connected with connecting screws, both ends of the printing box (7) are provided with positioning columns (73), the positioning columns (73) can be inserted into the positioning holes, and both ends of the printing box (7) are provided with mounting threaded holes (72), and the connecting screws can be threadedly connected in the mounting threaded holes (72).

4. A clothing printing device with a double-sided printing head according to claim 3, characterized in that: A scale (22) is provided on the outer side of the swing rod (2).

5. The clothing printing device with a double-sided printing head according to claim 1, characterized in that: A sliding bar is provided on one side of the sliding scraper (89) close to the lifting frame (85), and a sliding groove is provided inside the side guide frame (87), and the sliding bar is slidably connected in the sliding groove.

6. A clothing printing device with a double-sided printing head according to any one of claims 1 to 5, characterized in that: Two groups of connecting sleeves (86) are arranged on the top of the lifting frame (85), and the telescopic ends of the lifting cylinders (82) can be inserted into the connecting sleeves (86). The outer side of the connecting sleeves (86) is threadedly connected to a locking rod three.

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