Fresh tea leaf winnowing device
By designing a tea fresh leaf air selection device containing support blocks, rotating chambers, traction grooves and semi-sieve boxes, the problem of small leaves being blown out and dust being difficult to remove in the existing device is solved, and efficient utilization of resources and tea leaves are achieved. High quality sorting.
Patent Information
- Application Number
- CN202421170289.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-05-27
AI Technical Summary
During the use of the existing fresh tea leaves air selection device, the large airflow causes the small leaves to be blown out, causing waste of resources. At the same time, the dust adheres to the leaves and is not easily blown out.
A fresh tea leaf air selection device is designed, including a support block, a rotating chamber, a traction groove and a semi-screen box. It is driven by a transmission screw and an operating motor to screen and shake out the mobile block and a semi-screen box, and is generated by the fan. The airflow is air-selected and the dust is shaken by a vibration mechanism.
It effectively avoids the waste of resources on small leaves, improves the efficiency of removing impurities and dust, and improves the quality and taste of fresh tea leaves.
Smart Images
Figure CN222491019U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of tea processing, in particular to a fresh tea leaf air selection device. Background Art
[0002] After tea is picked but before processing, the picked fresh tea leaves need to be sorted in order to improve the quality and taste of the tea because the tea contains a large amount of impurities, bad leaves, foreign matter and other debris.
[0003] Existing fresh tea leaves are screened by wind selection devices. The fresh tea leaves fall from a high place, and the airflow generated by the fan blows out the debris, thereby improving the sorting efficiency. However, the existing wind selection devices for fresh tea leaves still have the following problems during use:
[0004] The existing air selection device directly blows the fresh tea leaves. Since the air flow generated by the air selection device is large, some of the fresh tea leaves are small and light in weight, which will be blown away by the air flow generated by the air selection device, causing a waste of resources. In addition, some dust adheres to the leaves and is not easy to blow out. Therefore, it is necessary to involve a fresh tea leaf air selection device for use in the existing tea processing field. Utility Model Content
[0005] In order to make up for the shortcomings of the prior art, the existing air selection device generates a large airflow, and some fresh tea leaves have small leaves and are light in weight, which will be blown away with the airflow generated by the air selection device, causing a waste of resources, and some dust adheres to the leaves and is not easy to blow out. The utility model proposes a fresh tea leaf air selection device.
[0006] The technical solution adopted by the utility model to solve the technical problem is: a fresh tea leaf air selection device, comprising a support block, a rotating chamber is arranged inside the support block, a traction groove is arranged on the side of the support block, the traction groove is communicated with the rotating chamber, an operating motor is fixedly assembled at one end of the support block, a transmission screw is fixedly assembled at the output end of the operating motor, the transmission screw movably penetrates into the rotating chamber, a threaded sleeve block is threadedly assembled on the transmission screw, a moving block is fixedly assembled on the threaded sleeve block, the moving block is movably assembled with the traction groove, a guide block is fixedly assembled at one end of the moving block, the guide block is located at one side of the support block, a horizontal block is fixedly assembled on the top of the guide block, the horizontal block is located above the support block, and a vertical block is fixedly assembled on the horizontal block. A horizontal plate is fixedly assembled on the vertical block, a vertical plate is fixedly assembled on one end of the horizontal plate, an operating panel is fixedly assembled on the top of the vertical plate, a mounting block is fixedly assembled on the operating panel, moving openings are symmetrically arranged on the operating panel, the moving openings are located on both sides of the mounting block, sliding rods are symmetrically fixedly assembled on both symmetrical side surfaces of the mounting block, a limit block is fixedly assembled on one end of the two sliding rods, the limit block is located on the outside of the moving opening, adjusting blocks are movably assembled on the two sliding rods, a cylinder is fixedly assembled on one of the adjusting blocks, a piston rod is fixedly assembled on the output end of the cylinder, and the other end of the piston rod is fixedly assembled with the mounting block, a half-screen box is fixedly assembled on one end of the traction block, one end of the two half-screen boxes are fitted together, and sieve holes are arranged on the inner bottom surface of the half-screen box.
[0007] Preferably, the adjusting blocks are fixedly equipped with fixing rods, the mounting blocks are fixedly equipped with mounting rods, the mounting rods are movably equipped with diamond blocks, the diamond blocks are symmetrically fixedly equipped with mounting rods, the mounting rods are close to both ends of the diamond blocks, the mounting rods are movably equipped with adjusting rods, the other ends of the adjusting rods are movably equipped with the fixed rods, the adjusting blocks are fixedly equipped with traction blocks, and the traction blocks are movably equipped with the moving openings.
[0008] Preferably, a support platform is fixedly mounted on the horizontal plate, a fan is fixedly mounted on the support platform, a horizontal pipe is fixedly mounted on the fan, the horizontal pipe is located above the support platform, a vertical pipe is fixedly mounted on one end of the horizontal pipe, the vertical pipe is located on one side of the support platform, a connecting pipe is fixedly mounted on one end of the vertical pipe, the connecting pipe passes through the vertical plate, and an injection block is fixedly mounted on one end of the connecting pipe, and injection holes are arranged on the surface of the injection block.
[0009] Preferably, the sides of the half screen box are symmetrically fixed with assembly plates, one end of the two assembly plates is fixedly equipped with connecting plates, the connecting plates are movably equipped with operating rods, the operating rods are fixedly equipped with traction plates, the operating rods are equipped with elastic springs, the two ends of the elastic springs are respectively fixedly equipped with the traction plates and the connecting plates, and one end of the operating rod is fixedly equipped with a guide arc block.
[0010] Preferably, the sides of the half screen box are fixedly equipped with fixed blocks, the fixed blocks are located above the assembly plate, the fixed blocks are movably equipped with movable blocks, the movable blocks are fixedly equipped with operating arc blocks, the operating arc blocks are fitted with guide arc blocks, the tops of the movable blocks are fixedly equipped with traction arc blocks, the movable blocks are equipped with telescopic springs, and the two ends of the telescopic springs are fixedly equipped with the traction arc block and the fixed block respectively.
[0011] Preferably, the sides of the support blocks are symmetrically fixed with connecting blocks, the tops of the connecting blocks are fixed with assembling blocks, a guide block is fixed between the two assembling blocks, the bottom of the guide block is provided with multiple arc surfaces, the bottom of the guide block is provided with multiple planes, the planes are sequentially located between the two arc surfaces, and the arc surfaces and planes of the guide block are sequentially fitted with the traction arc block.
[0012] The utility model is beneficial in that:
[0013] The utility model places fresh tea leaves on two fitted half-screen boxes, starts the operating motor, causes the transmission screw to rotate in the threaded sleeve block, causes the moving block to move on the traction groove, the guide block drives the vertical block on the horizontal block to move, the vertical block drives the vertical plate on the horizontal plate to move, the vertical plate drives the operating plate to move, so that the fresh tea leaves on the half-screen box pass through the screen holes to screen debris, after the screening is completed, starts the cylinder, one of the adjustment blocks moves on the slide bar, under the coordinated cooperation of the adjustment bar and the diamond block, the two adjustment blocks move in opposite directions of the slide bar, which helps to separate the two half-screen boxes, the half-screen box continues to move back and forth, which helps to shake out the fresh tea leaves from the half-screen box, helps to unload the fresh tea leaves, and the airflow generated by the support table passes through The horizontal pipe, the vertical pipe and the connecting pipe are blown into the jet block, and the jet holes blow the discharged fresh tea leaves. The airflow generated by the fan does not need to be too large, so that the fresh tea leaves after screening can be selected by air to prevent small fresh tea leaves from being blown out. At the same time, the half-screen box drives the fresh tea leaves to move back and forth or the two half-screen boxes move in opposite directions, so that the arc surface and the plane surface on the guide block are successively fitted with the traction arc block, so that the traction arc block drives the movable block to move on the fixed block, the telescopic spring is extended and retracted, and the operating arc block exerts force on the guide arc block, so that the operating rod moves on the assembly plate, and the elastic spring is extended and retracted, so that one end of the operating rod repeatedly knocks the half-screen box to increase the vibration of the half-screen box, which is helpful to shake off the dust on the fresh tea leaves and improve the operating effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0015] Figure 1 This is a schematic diagram of the structure of the fresh tea leaf air selection device of the utility model;
[0016] Figure 2 This is a schematic diagram of the structure of the fresh tea leaf air selection device of the utility model;
[0017] Figure 3 This is a schematic diagram of the vibration mechanism structure of the utility model;
[0018] Figure 4 It is a schematic diagram of the separation mechanism structure of the utility model.
[0019] In the figure:
[0020] 10. Support block; 11. Rotating chamber; 12. Traction groove; 13. Operating motor;
[0021] 20. Transmission screw; 21. Threaded sleeve block; 22. Moving block; 23. Guide block;
[0022] 30. Vertical block; 31. Horizontal board; 32. Vertical board; 33. Operation board;
[0023] 40. Support platform; 41. Fan; 42. Horizontal pipe; 43. Vertical pipe;
[0024] 50. Connecting pipe; 51. Injection block; 52. Connecting block; 53. Assembly block;
[0025] 60. guide block; 61. jet hole; 62. half screen box; 63. screen hole;
[0026] 70, traction arc block; 71, fixed block; 72, movable block; 73, operating arc block; 74, horizontal block;
[0027] 80. telescopic spring; 81. assembly plate; 82. connecting plate; 83. operating rod; 84. diamond block; 85. mounting rod; 86. adjusting rod; 87. traction block; 88. cylinder; 89. piston rod;
[0028] 90. traction plate; 91. elastic spring; 92. guide arc block; 93. moving opening; 94. mounting block; 95. sliding rod; 96. limiting block; 97. adjusting block; 98. fixing rod; 99. assembly rod. DETAILED DESCRIPTION
[0029] 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 of 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.
[0030] The following is combined with Figure 1 —4 Further details of this application:
[0031] The present application embodiment discloses a fresh tea leaf air selection device. Figure 1 and Figure 2 as well as Figure 4A fresh tea leaf air selection device comprises a support block 10, a rotating chamber 11 is arranged inside the support block 10, a traction groove 12 connected with the rotating chamber 11 is arranged on the side of the support block 10, an operating motor 13 is fixedly assembled at one end of the support block 10, a transmission screw 20 is fixedly assembled at the output end of the operating motor 13, the transmission screw 20 movably penetrates the rotating chamber 11, a threaded sleeve 21 is threadedly assembled on the transmission screw 20, a moving block 22 that moves in the traction groove 12 is fixedly assembled on the threaded sleeve 21, a guide block 23 is fixedly assembled at one end of the moving block 22, the guide block 23 is located on one side of the support block 10, a cross block 74 is fixedly assembled on the top of the guide block 23, the cross block 74 is located above the support block 10, and a cross block 74 is fixed on the cross block 74. A vertical block 30 is installed, a horizontal plate 31 is fixedly installed on the vertical block 30, a vertical plate 32 is fixedly installed on one end of the horizontal plate 31, an operating panel 33 is fixedly installed on the top of the vertical plate 32, a mounting block 94 is fixedly installed on the operating panel 33, a moving opening 93 is symmetrically provided on the operating panel 33, the moving opening 93 is located on both sides of the mounting block 94, and sliding rods 95 are symmetrically fixedly installed on the symmetrical sides of the mounting block 94, one end of the two sliding rods 95 is fixedly installed with a limit block 96, and the limit block 96 is located on the outside of the moving opening 93, and an adjusting block 97 is movably installed on the two sliding rods 95, and a cylinder 88 is fixedly installed on one of the adjusting blocks 97, and a piston rod 89 is fixedly installed on the output end of the cylinder 88, and the other end of the piston rod 89 is fixedly installed with the mounting block 94 The adjusting blocks 97 are all fixedly equipped with fixing rods 98, the mounting blocks 94 are fixedly equipped with mounting rods 99, the mounting rods 99 are movably equipped with diamond blocks 84, the diamond blocks 84 are symmetrically fixedly equipped with mounting rods 85, the mounting rods 85 are close to the two ends of the diamond blocks 84, the mounting rods 85 are movably equipped with adjusting rods 86, and the other ends of the adjusting rods 86 are movably assembled with the fixed rods 98, and the adjusting blocks 97 are all fixedly equipped with traction blocks 87 that move in the moving opening 93, one end of the traction blocks 87 is fixedly equipped with half screen boxes 62, one end of the two half screen boxes 62 are fitted, and the inner bottom surfaces of the half screen boxes 62 are all provided with sieve holes 63, the cross plate 31 is fixedly equipped with a support platform 40, and the support platform 40 is fixedly equipped with a fan 41, and the fan A horizontal tube 42 is fixedly mounted on the machine 41, and the horizontal tube 42 is located above the support platform 40. A vertical tube 43 is fixedly mounted on one end of the horizontal tube 42, and the vertical tube 43 is located on one side of the support platform 40. A connecting tube 50 is fixedly mounted on one end of the vertical tube 43, and the connecting tube 50 passes through the vertical plate 32, and an air jet block 51 is fixedly mounted on one end of the connecting tube 50, and an air jet hole 61 is arranged on the surface of the air jet block 51. Fresh tea leaves are placed on the two half-sieve boxes 62 that fit together, and the operating motor 13 is started to rotate the transmission screw 20 in the threaded sleeve block 21, so that the moving block 22 moves on the traction groove 12, and the guide block 23 drives the vertical block 30 on the horizontal block 74 to move, and the vertical block 30 drives the vertical plate 32 on the horizontal plate 31 to move, and the vertical plate 32 drives the operating plate 33 to move.The fresh tea leaves on the half-screen box 62 are sifted through the sieve holes 63 to sieve the debris. After the sifting is completed, the cylinder 88 is started, and one of the adjustment blocks 97 moves on the slide bar 95. Under the coordination of the adjustment rod 86 and the diamond block 84, the two adjustment blocks 97 move in opposite directions on the slide bar 95, which helps to separate the two half-screen boxes 62. The half-screen box 62 continues to move back and forth, which helps to shake out the fresh tea leaves from the half-screen box 62 and help to unload the fresh tea leaves. The airflow generated by the support platform 40 is blown into the jet block 51 through the horizontal pipe 42, the vertical pipe 43 and the connecting pipe 50, and the unloaded fresh tea leaves are blown by the jet hole 61. The airflow generated by the fan 41 does not need to be too large, so that the fresh tea leaves after sifting are selected by air, and small fresh tea leaves are prevented from being blown out.
[0032] Reference Figure 1 - Figure 3 , the sides of the half screen box 62 are symmetrically fixed with assembly plates 81, one end of the two assembly plates 81 is fixedly equipped with a connecting plate 82, the connecting plate 82 is movably equipped with an operating rod 83, and the operating rod 83 is fixedly equipped with a traction plate 90, which is fixedly equipped between the traction plate 90 and the connecting plate 82, and the operating rod 83 is assembled on the inner side of the elastic spring 91, and one end of the operating rod 83 is fixedly equipped with a guide arc block 92, and the sides of the half screen box 62 are fixedly equipped with a fixed block 71, and the fixed block 71 is located above the assembly plate 81, and the fixed block 71 is movably equipped with a movable block 72, and the movable block 72 is fixedly equipped with an operating arc block 73 that fits with the guide arc block 92, and the top of the movable block 72 is fixedly equipped with a traction arc block 70, and a telescopic spring 80 is fixedly assembled between the traction arc block 70 and the fixed block 71, and the movable block 72 is assembled on the inner side of the telescopic spring 80, and the side of the support block 10 is symmetrically fixedly equipped with a connecting block 52 The top of the connecting block 52 is fixedly assembled with an assembly block 53, and a guide block 60 is fixedly assembled between the two assembly blocks 53. The bottom of the guide block 60 is provided with multiple arc surfaces, and the bottom of the guide block 60 is provided with multiple planes, which are sequentially located between the two arc surfaces, and the arc surface and the plane of the guide block 60 are sequentially fitted with the traction arc block 70, and the half-screen box 62 drives the fresh tea leaves to move back and forth or the two half-screen boxes 62 move in opposite directions, so that the arc surface and the plane on the guide block 60 are sequentially fitted with the traction arc block 70, so that the traction arc block 70 drives the movable block 72 to move on the fixed block 71, the telescopic spring 80 is extended and retracted, and the operating arc block 73 is subjected to force on the guide arc block 92, so that the operating rod 83 moves on the assembly plate 81, and the elastic spring 91 is extended and retracted, so that one end of the operating rod 83 repeatedly knocks the half-screen box 62, increases the vibration of the half-screen box 62, helps to shake off the dust on the fresh tea leaves, and improves the operation effect.
[0033] Working principle: fresh tea leaves are placed on two fitted half-screen boxes 62, and the operating motor 13 is started to make the transmission screw 20 rotate in the threaded sleeve block 21, so that the moving block 22 moves on the traction groove 12, and the guide block 23 drives the vertical block 30 on the horizontal block 74 to move, and the vertical block 30 drives the vertical plate 32 on the horizontal plate 31 to move, and the vertical plate 32 drives the operating plate 33 to move, so that the fresh tea leaves on the half-screen box 62 pass through the screen hole 63 to sieve the debris. After the sieving is completed, the cylinder 88 is started, and one of the adjustment blocks 97 moves on the slide bar 95. Under the coordination of the adjustment rod 86 and the diamond block 84, the two adjustment blocks 97 move in opposite directions of the slide bar 95, which helps to separate the two half-screen boxes 62. The half-screen box 62 continues to move back and forth, which helps to shake out the fresh tea leaves from the half-screen box 62 and helps to unload the fresh tea leaves. The support table 40 generates The airflow is blown into the jet block 51 through the horizontal pipe 42, the vertical pipe 43 and the connecting pipe 50, and the unloaded fresh tea leaves are blown by the jet hole 61. The airflow generated by the fan 41 does not need to be too large, so that the fresh tea leaves after screening can be air-selected to prevent small fresh tea leaves from being blown out. At the same time, the half-screen box 62 drives the fresh tea leaves to move back and forth or the two half-screen boxes 62 move in opposite directions, so that the arc surface and the plane surface on the guide block 60 are successively fitted with the traction arc block 70, so that the traction arc block 70 drives the movable block 72 to move on the fixed block 71, the telescopic spring 80 is telescoped, and the operating arc block 73 is subjected to force on the guide arc block 92, so that the operating rod 83 moves on the assembly plate 81, and the elastic spring 91 is telescoped, so that one end of the operating rod 83 repeatedly knocks the half-screen box 62 to increase the vibration of the half-screen box 62, which is helpful to shake off the dust on the fresh tea leaves and improve the operating effect.
[0034] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.
Claims
1. A fresh tea leaf air selection device, characterized in that: The invention comprises a support block (10), wherein a rotating cavity (11) is arranged inside the support block (10), a traction groove (12) is arranged on the side of the support block (10), the traction groove (12) is connected with the rotating cavity (11), an operating motor (13) is fixedly mounted on one end of the support block (10), a transmission screw (20) is fixedly mounted on the output end of the operating motor (13), the transmission screw (20) movably penetrates the rotating cavity (11), and a threaded sleeve block (21) is threadedly mounted on the transmission screw (20). A moving block (22) is fixedly mounted on the threaded sleeve block (21), and the moving block (22) is movably assembled with the traction groove (12). A guide block (23) is fixedly mounted on one end of the moving block (22), and the guide block (23) is located on one side of the support block (10). A transverse block (74) is fixedly mounted on the top of the guide block (23), and the transverse block (74) is located above the support block (10). A vertical block (30) is fixedly mounted on the transverse block (74), and a transverse plate (31) is fixedly mounted on the vertical block (30). A vertical plate (32) is fixedly mounted on one end of the plate (31), an operating plate (33) is fixedly mounted on the top of the vertical plate (32), a mounting block (94) is fixedly mounted on the operating plate (33), a moving opening (93) is symmetrically arranged on the operating plate (33), the moving opening (93) is located on both sides of the mounting block (94), sliding rods (95) are symmetrically fixedly mounted on the symmetrical sides of the mounting block (94), one end of the two sliding rods (95) is fixedly mounted with a limit block (96), and the limit block (96) is located at the moving opening. On the outer side of the movable mouth (93), two slide bars (95) are movably equipped with adjustment blocks (97), one of the adjustment blocks (97) is fixedly equipped with a cylinder (88), the output end of the cylinder (88) is fixedly equipped with a piston rod (89), the other end of the piston rod (89) is fixedly equipped with a mounting block (94), one end of the traction block (87) is fixedly equipped with a half screen box (62), one end of the two half screen boxes (62) are fitted together, and the inner bottom surface of the half screen box (62) is provided with a screen hole (63).
2. A fresh tea leaf air selection device according to claim 1, characterized in that: The adjusting blocks (97) are fixedly equipped with fixing rods (98), the mounting blocks (94) are fixedly equipped with mounting rods (99), the mounting rods (99) are movably equipped with rhombus blocks (84), the rhombus blocks (84) are symmetrically fixedly equipped with mounting rods (85), the mounting rods (85) are close to both ends of the rhombus blocks (84), the mounting rods (85) are movably equipped with adjusting rods (86), the other ends of the adjusting rods (86) are movably equipped with the fixing rods (98), and the adjusting blocks (97) are fixedly equipped with traction blocks (87), which are movably equipped with the moving openings (93).
3. The fresh tea leaf air selection device according to claim 1, characterized in that: A support platform (40) is fixedly mounted on the horizontal plate (31), a fan (41) is fixedly mounted on the support platform (40), a horizontal pipe (42) is fixedly mounted on the fan (41), the horizontal pipe (42) is located above the support platform (40), a vertical pipe (43) is fixedly mounted on one end of the horizontal pipe (42), the vertical pipe (43) is located on one side of the support platform (40), a connecting pipe (50) is fixedly mounted on one end of the vertical pipe (43), the connecting pipe (50) passes through the vertical plate (32), and an air injection block (51) is fixedly mounted on one end of the connecting pipe (50), and an air injection hole (61) is provided on the surface of the air injection block (51).
4. The fresh tea leaf air selection device according to claim 1, characterized in that: The side surfaces of the half screen box (62) are symmetrically fixedly assembled with assembly plates (81), one end of the two assembly plates (81) is fixedly assembled with a connecting plate (82), an operating rod (83) is movably assembled on the connecting plate (82), a traction plate (90) is fixedly assembled on the operating rod (83), an elastic spring (91) is assembled on the operating rod (83), two ends of the elastic spring (91) are respectively fixedly assembled with the traction plate (90) and the connecting plate (82), and one end of the operating rod (83) is fixedly assembled with a guide arc block (92).
5. The fresh tea leaf air selection device according to claim 4, characterized in that: The sides of the half screen box (62) are fixedly assembled with fixed blocks (71), the fixed blocks (71) are located above the assembly plate (81), the fixed blocks (71) are movably assembled with movable blocks (72), the movable blocks (72) are fixedly assembled with operating arc blocks (73), the operating arc blocks (73) are fitted with the guide arc blocks (92), the tops of the movable blocks (72) are fixedly assembled with traction arc blocks (70), the movable blocks (72) are assembled with telescopic springs (80), and the two ends of the telescopic springs (80) are respectively fixedly assembled with the traction arc blocks (70) and the fixed blocks (71).
6. A fresh tea leaf air selection device according to claim 5, characterized in that: The side surfaces of the support blocks (10) are symmetrically fixedly assembled with connection blocks (52), the tops of the connection blocks (52) are fixedly assembled with assembly blocks (53), a guide block (60) is fixedly assembled between the two assembly blocks (53), a plurality of arc surfaces are arranged at the bottom of the guide block (60), a plurality of planes are arranged at the bottom of the guide block (60), the planes are sequentially located between the two arc surfaces, and the arc surfaces and planes of the guide block (60) are sequentially fitted with the traction arc block (70).