Joint process for asphalt pavement construction

Abstract

The invention discloses a joint process for asphalt pavement construction, and relates to the technical field of asphalt pavement construction, the joint process comprises the following steps: S1, cutting and edge polishing: accurately cutting the edge of a joint position by using cutting equipment, and then polishing the edge of a notch by using an edge shaping tool; s2, flexible material embedding and preheating fusion: embedding a special flexible joint material into a cutting gap, and preheating a joint area by using an infrared preheating device to promote fusion; according to the method, the atomized lubricating oil is sprayed to the cutting edge of the cutting blade which is being cut, abrasion of the cutting blade is greatly reduced, the cutting efficiency is remarkably improved, meanwhile, the straightness and smoothness of a cutting line are guaranteed, a solid foundation is laid for follow-up seam process treatment, meanwhile, the atomized lubricating oil can reduce use of the lubricating oil, and the service life of the cutting blade is prolonged. And before being sprayed on the cutting blade, the lubricating oil is cooled through ice water, the temperature of the lubricating oil is reduced, and abrasion of the blade is further reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of asphalt pavement construction, and specifically relates to a jointing process for asphalt pavement construction. Background Technique

[0002] Asphalt pavement is a pavement form that must be used for most medium and high-level roads. In the construction of asphalt pavement, the joint construction of asphalt pavement is an important link. The quality of the joint construction of asphalt pavement directly affects the appearance, internal quality and flatness of the road, and affects the service effect and service life of the road. Therefore, the requirements for the joint part are relatively strict in various standards.

[0003] During the construction process of asphalt pavement, joint treatment has always been a key technical link. Traditional jointing processes often face the wear of the cutting blades in the cutting equipment. Due to the friction between the blades and the asphalt pavement during the cutting process, the blades are prone to wear, which not only reduces the cutting efficiency, but also may cause the cutting line to be uneven, increasing the difficulty for subsequent joint treatment processes. At the same time, frequent blade replacement is likely to increase the construction cost. Summary of the Invention

[0004] To solve the problems raised in the above background technique, the present invention proposes a jointing process for asphalt pavement construction.

[0005] The object of the present invention can be achieved through the following technical solutions: A jointing process for asphalt pavement construction specifically includes the following steps:

[0006] S1. Cutting and edge grinding: Use a cutting device to precisely cut the edge of the joint position, and then use an edge shaping tool to grind the cut edge;

[0007] S2. Embedding and preheating fusion of flexible material: Embed a special flexible joint material into the cutting gap, and use an infrared preheating device to preheat the joint area to promote fusion;

[0008] S3. High-frequency vibration compaction and seamless treatment: Use a high-frequency vibration compaction device to compact the joint area, and finally use a joint flattening tool for seamless treatment.

[0009] As a further preference of this technical solution: The cutting device described in step S1 includes a cutting mechanism, and a lubrication mechanism is provided on the cutting mechanism;

[0010] The lubrication mechanism includes an oil storage cylinder for storing lubricating oil. The oil storage cylinder is connected through a first oil pipeline, a second oil pipeline and a connector to a third oil pipeline. A plurality of atomizing nozzles capable of atomizing the lubricating oil are provided on the third oil pipeline for spraying the atomized lubricating oil onto the cutting edge of the cutting blade in the cutting mechanism;

[0011] The lubrication mechanism further includes a cold water tank for storing cold water to cool the lubricating oil, and the first oil pipeline is bent and coiled inside the cold water tank.

[0012] As a further preference of this technical solution: The cutting mechanism includes a fixed housing, and two inclined plates are detachably installed at the bottom of the fixed housing, and the inclined plates are arranged on both sides of the cutting blade. A partition is arranged on one side of each inclined plate close to the cutting blade, and an oil outlet is formed on the fixed housing.

[0013] As a further preference of this technical solution: A collection box is fixedly connected to the fixed housing, and a filtering and cleaning mechanism is installed on the collection box;

[0014] It includes an anti-blocking component for cleaning small soil or foreign objects inside the oil outlet;

[0015] The anti-blocking component includes a fixed fixing plate, and a threaded groove for screw drive is arranged on the fixing plate, and a screw pair is arranged in the threaded groove and is used in cooperation with it;

[0016] The anti-blocking component further includes a first connecting plate for pushing and pulling the screw pair, which is driven by an electric push rod. A connecting shaft is fixedly connected to the first connecting plate, and a conical drill rod is fixedly connected to the connecting shaft for drilling into the sludge and foreign objects piled up inside the oil outlet. Drilling blades for crushing sludge and foreign objects are arranged on the conical drill rod.

[0017] As a further preference of this technical solution: The filtering and cleaning mechanism further includes an adsorption and scraping component;

[0018] The adsorption and scraping component includes a second connecting plate fixedly connected to the connecting shaft. A fixed seat is fixedly connected to the lower end of the second connecting plate, and a rotating shaft is rotatably connected to the fixed seat. A cylindrical magnet is rotatably connected to the rotating shaft for adsorbing metals in sludge and foreign objects.

[0019] As a further preference of this technical solution: The filtering and cleaning mechanism further includes a rotating component;

[0020] The rotating component is a connecting block fixedly connected to the collection box, and a rack is fixedly connected to the connecting block;

[0021] A rotating shaft meshing with the connecting block is fixedly connected to the rotating shaft.

[0022] As a further preference of this technical solution: A filter screen is arranged inside the collection box;

[0023] The cylindrical magnet is arranged above the filter screen.

[0024] As a further preference of the technical solution: a detachable door panel is provided on the collection box, and the detachable door panel and the collection box are locked through a locking component.

[0025] As a further preference of the technical solution: the collection box is connected to the oil storage cylinder through a return pipe.

[0026] As a further preference of the technical solution: the cutting device further includes a vehicle frame, a lifting push rod is provided on the vehicle frame, a lifting platform is provided at the output end of the lifting push rod, and the oil storage cylinder and the cold water tank are both arranged on the lifting platform.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] 1. In the present invention, the atomized lubricating oil is sprayed onto the cutting edge of the cutting blade being cut, the wear of the cutting blade is greatly reduced, the cutting efficiency is significantly improved, and at the same time, the straightness and smoothness of the cutting line are ensured, laying a solid foundation for the subsequent joint process treatment. At the same time, the atomized lubricating oil can reduce the use of lubricating oil, and before the lubricating oil is sprayed onto the cutting blade, it is cooled by ice water to reduce the temperature of the lubricating oil and further reduce the wear of the blade.

[0029] 2. In the present invention, the lubricating oil that is not sprayed onto the cutting blade will flow from the inner wall of the fixed shell onto the inclined plate, and then be recycled through the collection box. And through the filter screen, it can be effectively intercepted to ensure the quality of the recycled lubricating oil, realizing the recycling of resources and reducing the construction cost.

[0030] 3. In the present invention, small granular metal particles above the filter screen are adsorbed by a magnet to prevent abnormal metal particles from getting stuck in the filter holes of the filter screen or hurting the staff during the recycling process.

[0031] 4. In the present invention, when the cylindrical magnet reciprocally adsorbs small metal particles, the rotating shaft thereon drives the transmission gear to move, and due to the action of the rack, the cylindrical magnet rotates, so that when the cylindrical magnet adsorbs metal, it can rotate and adsorb, and will not only gather on a single surface, realizing uniform adsorption. Description of the Drawings

[0032] Figure 1 It is a three-dimensional structural schematic diagram of the cutting device;

[0033] Figure 2 For Figure 1 Partial structural cross-section in Figure 1 ;

[0034] Figure 3 For Figure 1 Enlarged schematic diagram at A in

[0035] Figure 4 ForFigure 2 Enlarged schematic view at B in

[0036] Figure 5 For Figure 1 Schematic of the local three-dimensional structure in Figure 1 ;

[0037] Figure 6 For Figure 1 Schematic of the local three-dimensional structure in Figure 2 ;

[0038] Figure 7 For Figure 1 Cross-section of the local structure in Figure 2 ;

[0039] Figure 8 For Figure 5 Enlarged schematic view at C in

[0040] Legend: 1. Frame; 2. Lifting push rod; 3. Lifting platform; 4. Cutting mechanism; 41. Fixed shell; 411. Inclined plate; 412. Partition plate; 413. Oil outlet; 42. Cutting motor; 43. Cutting blade; 5. Lubrication mechanism; 51. Oil storage cylinder; 52. Oil inlet; 53. First oil pipeline; 54. Return pipeline; 55. Delivery pump; 56. Cold water tank; 57. Drain pipe; 58. Second oil pipeline; 59. Connector; 510. Third oil pipeline; 511. Fixed block; 512. Atomizing nozzle; 6. Collection box; 61. Removable door panel; 62. Locking assembly; 7. Support platform; 8. Filter cleaning mechanism; 81. Anti-blocking assembly; 811. Fixed plate; 812. Electric push rod; 813. First connecting plate; 814. Screw pair; 815. Connecting shaft; 816. Tapered drill rod; 817. Drilling blade; 82. Adsorption and scraping assembly; 821. Second connecting plate; 822. Fixed seat; 823. Scraper; 824. Cylindrical magnet; 825. Rotating shaft; 83. Rotating assembly; 831. Driving gear; 832. Connecting block; 833. Rack; 84. Filter screen. Specific implementation mode

[0041] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] Embodiment 1:

[0043] Please refer to Figures 1 - 8 , this application provides a joint process for asphalt pavement construction, which specifically includes the following steps:

[0044] S1. Cutting and Edge Grinding: Use cutting equipment to precisely cut the edges at the joint positions, ensuring that the cutting lines are straight and smooth, reducing the difficulty in subsequent joint treatment. Subsequently, use edge shaping tools to grind the cut edges, and use special edge shaping tools to finely grind the cut edges to remove burrs and irregular parts, laying a solid foundation for the tight fitting of the joints;

[0045] S2. Flexible Material Embedding and Preheating Fusion: Adopt special flexible joint materials, which have good stretchability and adhesiveness and can adapt to the thermal expansion and contraction of the road surface. Precisely embed the flexible material into the cutting gaps and apply slight pressure to ensure that the material is fully filled without obvious air bubbles. Subsequently, use an infrared preheating device to preheat the joint area to promote the preliminary fusion of the flexible material with the asphalt pavement on both sides, enhancing the strength and durability of the joints;

[0046] S3. High-frequency Vibration Compaction and Seamless Treatment: After completing the embedding and preheating fusion of the flexible material, use high-frequency vibration compaction equipment to compact the joint area. The equipment acts on the joint material through high-frequency vibration waves, making it more closely combined with the surrounding asphalt pavement, while reducing the stress concentration phenomenon generated during the compaction process. After compaction, use precise joint leveling tools to perform the final seamless treatment on the joint surface to ensure that the joint is visually consistent with the surrounding road surface without obvious height differences or defects.

[0047] Example Two:

[0048] On the basis of the first embodiment, the cutting device described in step S1 includes a cutting mechanism 4 for cutting the edges of the joint position. The cutting mechanism 4 includes a fixed housing 41 fixedly connected to the bottom surface of the lifting table 3. A cutting blade 43 is arranged inside the fixed housing 41, and a cutting motor 42 for driving the cutting blade 43 is arranged on the fixed housing 41. A lubricating mechanism 5 is arranged on the cutting mechanism 4; the lubricating mechanism 5 includes an oil storage cylinder 51 for storing lubricating oil. An oil inlet 52 is arranged on the oil storage cylinder 51 for adding and replenishing lubricating oil. The oil storage cylinder 51 is connected through a first oil pipe 53, a second oil pipe 58 and a connector 59 to a third oil pipe 510. A plurality of atomizing nozzles 512 capable of atomizing the lubricating oil are arranged on the third oil pipe 510. The atomizing nozzles 512 are existing products and are internally provided with a self-priming pump body capable of sucking the lubricating oil inside the oil storage cylinder 51 into the atomizing nozzles 512. Two third oil pipes 510 are arranged and are arranged on both sides of the cutting blade 43. The cutting blade 43 is fixed inside the fixed housing 41 through a fixing block 511. The connector 59 is used to introduce the lubricating oil into the two third oil pipe 510 pipelines, facilitating the simultaneous lubrication of the two sides of the cutting blade 43. The atomized lubricating oil is used to be sprayed onto the cutting edges of the cutting blade 43 in the cutting mechanism 4. The lubricating mechanism 5 further includes a cold water tank 56 for storing cold water to cool the lubricating oil, and the first oil pipe 53 is bent and coiled inside the cold water tank 56.

[0049] Specifically, the lubricating oil inside the oil storage cylinder 51 flows into the second oil pipe 58 through the first oil pipe 53 and is input into the third oil pipe 510 through the connector 59. The atomizing nozzles 512 on the third oil pipe 510 spray the lubricating oil onto the cutting edges of the cutting blade 43 for cutting the edges of the asphalt. At the same time, by adding ice water into the cold water tank 56, the first oil pipe 53 is bent and coiled inside the cold water tank 56, increasing the contact time with the ice water, so that the lubricating oil inside the first oil pipe 53 is cooled. Furthermore, the lubricating oil sprayed onto the cutting blade 43 is atomized and cold lubricating oil, thereby reducing the wear of the cutting blade 43 and improving the cutting efficiency.

[0050] In this embodiment, the cutting mechanism 4 includes a fixed housing 41. Two inclined plates 411 are detachably installed at the bottom of the fixed housing 41, facilitating the lubricating oil that does not fall onto the cutting blade 43 after atomization to float onto the inner wall of the fixed housing 41 to form oil droplets, and then fall onto the inclined plates 411 for collecting the oil droplets, which can reduce the waste of lubricating oil. The inclined plates 411 are arranged on both sides of the cutting blade 43. A partition plate 412 is provided on one side of each inclined plate 411 close to the cutting blade 43. An oil outlet 413 is formed in the fixed housing 41. The inclined plates 411 are fixed to the side inner wall of the fixed housing 41 and can be fixed by clamping or gluing. The clamping method is preferably used for fixation, which is convenient for disassembly. The inclined plates 411 are inclined plate-shaped, and the section close to the oil outlet 413 is the bottom of the slope and is flush with the oil outlet 413, facilitating the lubricating oil to flow into the interior of the oil outlet 413. The partition plate 412 is slightly close to the cutting blade 43 and does not fit. By cooperating with the inclined plates 411, it can block most of the larger pieces of soil and foreign objects.

[0051] In this embodiment, the cutting device further includes a vehicle frame 1. A lifting push rod 2 is arranged on the vehicle frame 1. The output end of the lifting push rod 2 is provided with a lifting platform 3. The oil storage cylinder 51 and the cold water tank 56 are both arranged on the lifting platform 3, which can improve the height adjustment of the lifting platform 3 by the lifting push rod 2, and then realize the height adjustment of the cutting blade 43 of the cutting blade to cut asphalt.

[0052] Embodiment Three:

[0053] On the basis of Embodiment Two, a collection box 6 is fixedly connected to the fixed housing 41. A filter cleaning mechanism 8 is installed on the collection box 6; it includes an anti-blocking component 81 for cleaning small soil or foreign objects inside the oil outlet 413; the anti-blocking component 81 includes a fixed fixing plate 811. The fixing plate 811 is fixed to the bottom surface of the lifting platform 3 by two fixing rods. A threaded groove for screw drive is arranged on the fixing plate 811. A screw pair 814 used in cooperation with it is arranged in the threaded groove. The anti-blocking component 81 further includes a first connecting plate 813 for pushing and pulling the screw pair 814, which is driven by an electric push rod 812. The electric push rod 812 is fixed to the vehicle frame 1 through a support platform 7. A connecting shaft 815 is fixedly connected to the first connecting plate 813. A conical drill rod 816 is fixedly connected to the connecting shaft 815 for drilling into the sludge and foreign objects piled up inside the oil outlet 413. Drilling blades 817 for crushing the sludge and foreign objects are arranged on the conical drill rod 816.

[0054] Specifically, when the recycled lubricating oil flows along the slope of the inclined plate 411 into the interior of the oil outlet 413, and then into the interior of the collection box 6 for collection. During this process, by starting the electric push rod 812 to drive the first connecting plate 813 to reciprocate, the first connecting plate 813 passes through the push-pull screw pair 814, and then the screw pair 814 can rotate and reciprocate under the action of the fixed plate 811. The screw pair 814 drives the conical drill rod 816 to push and pull inside the oil outlet 413 through the connecting shaft 815, and the conical drill rod 816 can drive the drilling blade 817 to rotate to crush large pieces of dirt and foreign objects, preventing the oil outlet 413 from being blocked and causing the lubricating oil to not be recycled normally.

[0055] Embodiment 4:

[0056] On the basis of Embodiment 3, the filtering and cleaning mechanism 8 further includes an adsorption and scraping component 82; the adsorption and scraping component 82 includes a second connecting plate 821 fixedly connected to the connecting shaft 815, the lower end of the second connecting plate 821 is fixedly connected with a fixed seat 822, a rotating shaft 825 is rotatably connected to the fixed seat 822, and a cylindrical magnet 824 is rotatably connected to the rotating shaft 825 for adsorbing metals in sludge and foreign objects.

[0057] Specifically, when the connecting shaft 815 is reciprocally pushed and pulled, it drives the second connecting plate 821 to reciprocate on the upper part of the filter screen 84. The second connecting plate 821 reciprocates through the fixed seat 822, and the fixed seat 822 drives the cylindrical magnet 824 to reciprocate on the upper part of the filter screen 84 through the rotating shaft 825, and adsorbs small particulate metal foreign objects that bounce into the inclined plate 411 from the tiny gaps between the cutting blade 43 and the partition plate 412 during the cutting process of the cutting blade 43. Larger blocky hard objects cannot enter from the small gaps between the cutting blade 43 and the partition plate 412, so only the small metal substances need to be cleaned. Because the metal is in an irregular shape and relatively sharp, it is easy to get stuck in the holes of the filter screen 84 during the cleaning process, and it may be relatively sharp during the cleaning process, resulting in the problem of accidentally injuring the user's body. However, through the centralized collection by the cylindrical magnet 824, the above problems can be avoided.

[0058] Embodiment 5:

[0059] On the basis of Embodiment 4, the filtering and cleaning mechanism 8 further includes a rotating component 83; the rotating component 83 is a connecting block 832 fixedly connected to the collection box 6, and a rack 833 is fixedly connected to the connecting block 832; a rotating shaft 825 meshing with the connecting block 832 is fixedly connected to the rotating shaft 825.

[0060] Specifically, when the cylindrical magnet 824 reciprocally adsorbs small particulate metals, the rotating shaft 825 thereon drives the transmission gear 831 to move. Also, due to the action of the rack 833, the cylindrical magnet 824 is driven to rotate. Thus, when the cylindrical magnet 824 adsorbs metals, it can adsorb while rotating and will not only aggregate on a single surface, achieving uniform adsorption.

[0061] Embodiment Six:

[0062] Based on Embodiment Five, the filtering and cleaning mechanism 8 further includes a filter screen 84 disposed inside the collection box 6; it is used to block small particulate soil and asphalt particles, so as to filter the recycled lubricating oil and improve the quality of the lubricating oil that can be reused. The cylindrical magnet 824 is disposed above the filter screen 84. The collection box 6 is connected to the oil storage cylinder 51 through a return pipe 54, and a delivery pump 55 is connected between the return pipes 54, which is used to pump the lubricating oil flowing back into the collection box 6 into the interior of the oil storage cylinder 51 through the delivery pump 55, realizing recycling.

[0063] The collection box 6 is provided with a detachable door panel 61, which is convenient for removing the sludge and foreign objects remaining on the filter screen 84 by opening the detachable door panel 61 after cleaning. Moreover, the detachable door panel 61 and the collection box 6 are locked by a locking assembly 62.

[0064] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical method of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A jointing process for asphalt pavement construction, characterized in that: The specific steps include: S1. Cutting and edge grinding: Use cutting equipment to accurately cut the edges of the joints, and then use edge shaping tools to grind the cut edges; S2. Embedding and preheating of flexible materials: embed the special flexible joint material into the cutting gap, and use the infrared preheating device to preheat the joint area to promote fusion; S3. High-frequency vibration compaction and seamless processing: Use high-frequency vibration compaction equipment to compact the joint area, and finally use the joint leveling tool to perform seamless processing.

2. A jointing process for asphalt pavement construction according to claim 1, characterized in that: The cutting device in step S1 comprises a cutting mechanism (4), and a lubrication mechanism (5) is provided on the cutting mechanism (4); The lubricating mechanism (5) comprises an oil storage cylinder (51) for storing lubricating oil, the oil storage cylinder (51) is connected to a No. 3 oil delivery pipe (510) via a No. 1 oil delivery pipe (53), a No. 2 oil delivery pipe (58) and a connector (59), and the No. 3 oil delivery pipe (510) is provided with a plurality of atomizing nozzles (512) capable of atomizing lubricating oil, and is used to spray the atomized lubricating oil onto the blade of the cutting blade (43) in the cutting mechanism (4); The lubricating mechanism (5) further comprises a cold water tank (56) for storing cold water to cool the lubricating oil, and the first oil delivery pipe (53) is bent and coiled inside the cold water tank (56).

3. A jointing process for asphalt pavement construction according to claim 2, characterized in that: The cutting mechanism (4) comprises a fixed shell (41), the bottom of which is detachably mounted two inclined plates (411), the inclined plates (411) being arranged on both sides of a cutting blade (43), a partition plate (412) being arranged on one side of each inclined plate (411) close to the cutting blade (43), and an oil outlet (413) being provided on the fixed shell (41).

4. A jointing process for asphalt pavement construction according to claim 3, characterized in that: The fixed shell (41) is fixedly connected to a collecting box (6), and a filtering and cleaning mechanism (8) is installed on the collecting box (6); It includes an anti-blocking component (81) for cleaning small dirt or foreign matter inside the oil outlet (413); The anti-blocking assembly (81) comprises a fixed fixing plate (811), the fixing plate (811) is provided with a thread groove for spiral transmission, and a spiral pair (814) matched with the thread groove is provided in the thread groove; The anti-blocking component (81) also includes a No. 1 connecting plate (813) for pushing and pulling the spiral pair (814), which is driven by an electric push rod (812); a connecting shaft (815) is fixedly connected to the No. 1 connecting plate (813); a conical drill rod (816) is fixedly connected to the connecting shaft (815) for drilling into sludge and foreign matter accumulated inside the oil outlet (413); and a drilling blade (817) for crushing the sludge and foreign matter is provided on the conical drill rod (816).

5. A jointing process for asphalt pavement construction according to claim 4, characterized in that: The filtering and cleaning mechanism (8) further comprises an adsorption and scraping component (82); The adsorption and scraping component (82) comprises a second connecting plate (821) fixedly connected to the connecting shaft (815); the lower end of the second connecting plate (821) is fixedly connected to a fixing seat (822); a rotating shaft (825) is rotatably connected to the fixing seat (822); and a cylindrical magnet (824) is rotatably connected to the rotating shaft (825) for adsorbing metal in sludge and foreign matter.

6. A jointing process for asphalt pavement construction according to claim 5, characterized in that: The filtering and cleaning mechanism (8) further comprises a rotating assembly (83); The rotating assembly (83) is fixedly connected to a connecting block (832) on the collecting box (6), and a rack (833) is fixedly connected to the connecting block (832); The rotating shaft (825) is fixedly connected to the rotating shaft (825) and is meshed with the connecting block (832).

7. A jointing process for asphalt pavement construction according to claim 6, characterized in that: The filtering and cleaning mechanism (8) further comprises a filter screen (84) arranged inside the collection box (6); The cylindrical magnet (824) is arranged above the filter screen (84).

8. A jointing process for asphalt pavement construction according to claim 4, characterized in that: The collection box (6) is provided with a detachable door panel (61), and the detachable door panel (61) and the collection box (6) are locked via a locking assembly (62).

9. A jointing process for asphalt pavement construction according to claim 4, characterized in that: The collecting box (6) is connected to the oil storage cylinder (51) via a return pipe (54).

10. A jointing process for asphalt pavement construction according to claim 2, characterized in that: The cutting device further comprises a frame (1), a lifting push rod (2) is arranged on the frame (1), a lifting platform (3) is arranged at the output end of the lifting push rod (2), and the oil storage cylinder (51) and the cold water tank (56) are both arranged on the lifting platform (3).

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