Yarn arranging machine for chemical fiber grey cloth

Abstract

The utility model discloses a yarn arranging machine for chemical fiber grey cloth, and particularly relates to the technical field of cloth production, the yarn arranging machine comprises a supporting seat, the left side and the right side of the middle part of the upper end of the outer surface of the supporting seat are fixedly connected with supporting convex plates, and the upper sides of the middle parts of the ends, close to each other, of the two supporting convex plates are jointly and fixedly connected with a yarn arranging mechanism; tension mechanisms are fixedly connected to the rear sides of the upper portions of the ends, away from each other, of the two supporting protruding plates, a pressing mechanism is fixedly connected to the front portion of the upper end of the supporting base, and a rotating wheel is jointly and rotationally connected to the lower sides of the rear portions between the opposite faces of the two supporting protruding plates. The upper sides of the front portions between the opposite faces of the two supporting protruding plates are jointly and rotationally connected with a first rotating roller. According to the wire arranging machine for the chemical fiber grey cloth, the distance between the wire arranging mechanisms can be adjusted through the arranged wire arranging mechanisms, the wire arranging machine can effectively adapt to different grey cloth conditions with the large density or the small density, protection on the chemical fiber cloth is effectively improved, and wire arranging is more thorough.

Description

Technical Field

[0001] The utility model relates to the technical field of cloth production, in particular to a thread-arranging machine for chemical fiber grey cloth. Background Art

[0002] With the continuous development of the chemical fiber industry, chemical fiber grey fabrics are used more and more widely in various fields. However, in the production process of chemical fiber grey fabrics, problems such as messy thread ends and uneven yarns often occur, which not only affects the appearance quality of the grey fabrics, but may also have an adverse effect on subsequent processing procedures. Therefore, a wire arrangement machine for chemical fiber grey fabrics is needed.

[0003] Chinese patent announcement number CN211497942U discloses a wire management frame for a spinning machine, which solves the shortcoming of low efficiency of the existing spinning roller when collecting. The frame comprises a bracket, an outer wheel is fixed to the top of the bracket by bolts, the inner wheel is connected to the inner wheel by a bearing, a plurality of wire management grooves are evenly distributed on the outer side of the outer wheel, a plurality of baffles are evenly distributed and welded on the outer side of the inner wheel, a wire management roller is installed inside the baffle, a return spring is connected to the baffle and the inner side of the outer wheel, an L-shaped baffle is welded on the outer side of the inner wheel, so that the baffle at the end of the baffle covers the wire management groove, the wire management roller is connected to the wire management roller by the wire management seat bearing installed on the inner wall of the baffle to guide the yarn, the baffle is slid to open the wire management groove by the toggle rod on the top of the inner wheel, so that the yarn is easily loaded, and the toggle rod is reset under the action of the return spring after the toggle rod is released, so as to cover the yarn and prevent it from falling off. Other yarns are not easy to fall off during the single loading process, and the practicability is strong.

[0004] However, the above patent documents still have the following defects in the implementation process:

[0005] Although the above-mentioned patent document can perform the wire organizing process during use, the tension of the wire cannot be adjusted during the wire organizing process, which may cause the grey cloth to relax or over-stretch, resulting in the wire organizing mechanism being unable to effectively contact the grey cloth for combing. The thread ends and yarns may not be fully organized, resulting in wrinkles, displacement, etc., affecting the accuracy and stability of the wire organizing. In addition, the spacing of the wire organizing mechanism cannot be adjusted. The grey cloth has differences in yarn density, thread end distribution, etc., and may not be able to adapt to different grey cloths with higher or lower density, which may cause damage to the yarn and incomplete wire organizing. Utility Model Content

[0006] The main purpose of the utility model is to provide a wire arrangement machine for chemical fiber grey cloth, which can effectively solve the problem of incomplete wire arrangement.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A thread arranging machine for chemical fiber grey cloth, including a support base, four corners of the lower end of the support base are fixedly connected with support legs, the upper middle parts of the left and right sides of the outer surface of the support base are fixedly connected with support convex plates, the upper sides of the middle parts of the mutually approaching ends of the two support convex plates are jointly fixedly connected with a thread arranging mechanism, the upper parts of the mutually remote ends of the two support convex plates are fixedly connected with a tension mechanism at the rear side, the front part of the upper end of the support base is fixedly connected with a pressing mechanism, the lower side of the rear part between the opposite surfaces of the two support convex plates is jointly rotatably connected with a rotating wheel, and the upper side of the front part between the opposite surfaces of the two support convex plates is jointly rotatably connected with a first rotating roller.

[0009] Preferably, the support legs include two square columns, the two square columns are respectively fixedly connected to the upper middle parts between the opposite surfaces of the two support convex plates, sliding grooves I are opened at the rear middle parts between the opposite surfaces of the two square columns, support rods are jointly fixedly connected to the upper and lower sides of the front parts between the opposite surfaces of the two square columns, a plurality of carding rollers are jointly slidably connected to the outer surfaces of the two support rods, cylinders are fixedly connected to the middle parts of the rear ends of the plurality of carding rollers, a sliding plate is jointly slidably connected to the inner cavities of the two sliding grooves I, a plurality of sliding grooves are opened on the outer surface of the sliding plate, a support plate I is fixedly connected to the rear ends of the two square columns, and a lifting mechanism is fixedly connected to the middle part of the rear end of the support plate I.

[0010] Preferably, the plurality of sliding grooves are arranged in a fan shape on the surface of the sliding plate, and the rear ends of the plurality of cylinders are slidably connected to the inner cavities of the sliding grooves on the same side.

[0011] Preferably, the lifting mechanism includes a second fixing plate and a first fixing plate, the second fixing plate is fixedly connected to the lower middle part of the rear end of the support plate I, the first fixing plate is fixedly connected to the upper middle part of the rear end of the support plate I, a first motor is fixedly connected to the upper end of the first fixing plate, a threaded rod is rotatably connected to the upper end of the second fixing plate, a first slider is threadedly connected to the outer surface of the threaded rod, a through hole is opened in the middle part of the rear end of the support plate I, and the front end of the first slider is fixedly connected to the middle part of the rear end of the sliding plate through the through hole.

[0012] Preferably, the tension mechanism includes a first rotating rod and two second support plates, the two second support plates are respectively fixedly connected to the upper parts of the mutually remote ends of the two support convex plates at the rear side, the front ends of the two second support plates are rotatably connected to a first lead screw, the front ends of the two first lead screws are rotatably connected to a gear set, the gear set is composed of two meshing bevel gears, the first rotating rod is rotatably connected to the upper middle part between the opposite surfaces of the two support convex plates, the left end and the right end of the first rotating rod penetrate through the outer surface of the support convex plate on the same side and extend to the outside, the left end and the right end of the first rotating rod are rotatably connected to the bevel gear in the same side in the vertical direction, and the front end of the first lead screw on the left side penetrates through the bevel gear on the same side and extends to the outside.

[0013] Preferably, chutes two are provided on the upper sides of the rear parts of the left and right ends of the outer surfaces of the two support convex plates. Slide blocks two are slidably connected to the inner cavities of the two chutes two. The mutually approaching ends of the two slide blocks two are jointly rotatably connected to a rotating roller two. A plurality of rubber bumps are fixedly connected to the outer surface of the rotating roller two in an annular array. The mutually remote ends of the two slide blocks two are both threadedly connected to the outer surface of the same lead screw one. The upper side of the middle part of the left end of the support convex plate is fixedly connected to a motor two. The output end of the motor two is fixedly connected to the front end of the left lead screw one through a coupling.

[0014] Preferably, the pressing mechanism includes two support plates three, which are respectively fixedly connected to the left and right sides of the front part of the upper end of the support seat. The mutually approaching lower sides of the ends of the two support plates three are jointly rotatably connected to a roller one. Chutes three are provided in the middle parts of the outer surfaces of the two support plates three. Slide blocks three are slidably connected to the inner cavities of the two chutes three. The mutually approaching ends of the two slide blocks three are jointly rotatably connected to a roller two. Springs are fixedly connected to the upper ends of the two slide blocks three. The upper ends of the two springs are respectively fixedly connected to the upper walls of the inner cavities of the chutes three. Limit rods are fixedly connected to the middle parts of the upper walls of the inner cavities of the two chutes three.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. During the use of the utility model, the tension mechanism can adjust the tension of the wire, preventing the base fabric from being slack or overstretched during the wire arrangement process. This effectively enables the wire arrangement mechanism to contact the base fabric for combing, fully arranging the thread ends and yarns of the base fabric without wrinkles, displacement, etc., improving the accuracy and stability of wire arrangement.

[0017] 2. During the use of the utility model, the wire arrangement mechanism can adjust the distance between the wire arrangement mechanisms, effectively adapting to different base fabrics with larger or smaller densities, effectively increasing the protection of chemical fiber fabrics and making the wire arrangement more thorough. Description of the Drawings

[0018] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 is a schematic cross-sectional structure diagram of the wire arrangement mechanism of the utility model;

[0020] Figure 3 is a schematic cross-sectional structure diagram of the tension mechanism of the utility model;

[0021] Figure 4 is of the utility model Figure 1 magnified view of part A in the figure;

[0022] Figure 5This is another perspective schematic diagram of the overall structure of the present utility model.

[0023] In the figure: 1, support base; 2, support leg; 3, pressing mechanism; 31, third support plate; 32, third slider; 33, first roller; 34, second roller; 35, spring; 36, third chute; 37, limiting rod; 4, first rotating roller; 5, wire arranging mechanism; 51, square column; 52, first chute; 53, support rod; 54, combing roller; 55, cylinder; 56, sliding plate; 57, sliding groove; 58, first support plate; 59, lifting mechanism; 591, first motor; 592, first fixing plate; 593, threaded rod; 594, first slider; 595, second fixing plate; 596, through hole; 6, support convex plate; 7, tension mechanism; 71, second motor; 72, second chute; 73, second support plate; 74, first rotating rod; 75, gear set; 76, second slider; 77, first lead screw; 78, second rotating roller; 79, rubber convex block; 8, rotating wheel. Specific embodiments

[0024] In order to make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] As Figure 1 shown, a wire arranging machine for chemical fiber grey cloth includes a support base 1, support legs 2 are fixedly connected to the four corners of the lower end of the support base 1, support convex plates 6 are fixedly connected to the middle left and right sides of the upper surface of the support base 1, a wire arranging mechanism 5 is fixedly connected to the upper middle part of the mutually close ends of the two support convex plates 6, tension mechanisms 7 are fixedly connected to the upper rear parts of the mutually far ends of the two support convex plates 6, a pressing mechanism 3 is fixedly connected to the front part of the upper end of the support base 1, a rotating wheel 8 is rotatably connected to the lower side of the rear part between the opposite surfaces of the two support convex plates 6, and a first rotating roller 4 is rotatably connected to the upper front part between the opposite surfaces of the two support convex plates 6.

[0026] In the specific implementation process of this solution, first, a cloth winding device needs to be installed behind the overall device. The cloth winding device is generally driven by components such as a motor and a transmission shaft to drive the winding roller to rotate, so as to realize the automatic winding of the chemical fiber grey cloth after wire arranging.

[0027] The specific installation method, connection method of the circuit and control method of the cloth winding device are all conventional designs, as long as it can drive the cloth of the chemical fiber grey cloth after wire arranging to automatically wind backward in this solution, and the present utility model will not elaborate in detail.

[0028] In the above, first, the operator passes the prepared chemical fiber blank fabric through the inside of the pressing mechanism 3 and then passes it backward from above the first rotating roller 4, then passes the chemical fiber blank fabric backward through the inside of the tension mechanism 7, and finally passes the chemical fiber blank fabric through below the rotating wheel 8 and then accesses it into the fabric winding device. Start the fabric winding device to drive the chemical fiber blank fabric to move backward. At the same time, adjust the wire arranging mechanism 5 according to the density of the chemical fiber blank fabric, so that the wire arranging mechanism 5 can more accurately comb the thread ends and yarns on the chemical fiber blank fabric, improve the accuracy and effect of wire arranging. Then, adjust the tension mechanism 7 according to the different materials and different thicknesses of the chemical fiber blank fabric, so that the chemical fiber blank fabric maintains an appropriate tension state during the wire arranging process, ensuring that the wire arranging mechanism 5 can fully contact the blank fabric, effectively comb the thread ends and yarns, and improve the quality and efficiency of wire arranging.

[0029] Specifically, in order to achieve the purpose of maintaining the pulling force on the chemical fiber blank fabric during the backward movement of the chemical fiber blank fabric, referring to Figure 4 , in this solution, the pressing mechanism 3 includes two third support plates 31. The two third support plates 31 are respectively fixedly connected to the left front side and the right front side of the upper end of the support base 1. The lower sides of the mutually approaching ends of the two third support plates 31 are jointly rotatably connected with a first roller 33. The middle parts of the outer surfaces of the two third support plates 31 are both provided with third chutes 36. The inner cavities of the two third chutes 36 are both slidably connected with third sliders 32. The mutually approaching ends of the two third sliders 32 are jointly rotatably connected with a second roller 34. The upper ends of the two third sliders 32 are both fixedly connected with springs 35. The upper ends of the two springs 35 are respectively fixedly connected to the upper walls of the inner cavities of the third chutes 36. The middle parts of the upper walls of the inner cavities of the two third chutes 36 are both fixedly connected with limit rods 37.

[0030] In the above, pass the chemical fiber blank fabric through between the second roller 34 and the first roller 33. Through the action of the provided spring 35, a certain pressure can be maintained on the chemical fiber blank fabric with different thicknesses, thereby ensuring a certain pulling force during the backward movement of the chemical fiber blank fabric.

[0031] Specifically, in order to achieve the purpose of adjusting an appropriate wire arranging distance for chemical fiber blank fabrics with different densities, referring to Figure 2 , in this solution, the support leg 2 includes two square columns 51. The two square columns 51 are respectively fixedly connected to the middle upper sides between the opposite surfaces of the two support convex plates 6. The middle rear sides between the opposite surfaces of the two square columns 51 are both provided with first chutes 52. The upper front side and the lower front side between the opposite surfaces of the two square columns 51 are jointly fixedly connected with support rods 53. A number of combing rollers 54 are jointly slidably connected to the outer surfaces of the two support rods 53. The middle parts of the rear ends of the number of combing rollers 54 are all fixedly connected with cylinders 55. The inner cavities of the two first chutes 52 are jointly slidably connected with a slide plate 56. The outer surface of the slide plate 56 is provided with a number of sliding grooves 57. The two rear ends of the square columns 51 are jointly fixedly connected with a first support plate 58. The middle part of the rear end of the first support plate 58 is fixedly connected with a lifting mechanism 59.

[0032] Furthermore, a number of sliding grooves 57 are arranged in a fan shape on the surface of the sliding plate 56, and the rear ends of a number of cylinders 55 are all slidably connected to the inner cavity of the sliding grooves 57 on the same side.

[0033] Furthermore, the lifting mechanism 59 includes a second fixing plate 595 and a first fixing plate 592. The second fixing plate 595 is fixedly connected to the lower side of the middle part of the rear end of the first support plate 58, the first fixing plate 592 is fixedly connected to the upper side of the middle part of the rear end of the first support plate 58, a first motor 591 is fixedly connected to the upper end of the first fixing plate 592, a threaded rod 593 is rotatably connected to the upper end of the second fixing plate 595, a first slider 594 is threadedly connected to the outer surface of the threaded rod 593, a through hole 596 is formed in the middle part of the rear end of the first support plate 58, and the front end of the first slider 594 is fixedly connected to the middle part of the rear end of the sliding plate 56 through the through hole 596.

[0034] In the above, the cloth moves backward from below the carding roller 54. By starting the first motor 591 to drive the rotation of the threaded rod 593, the threaded rod 593 drives the first slider 594 to move up and down, and then drives the sliding plate 56 to move up and down inside the first sliding groove 52. When the sliding plate 56 moves upward, the shape of the arranged sliding grooves 57 drives a number of cylinders 55 to move closer to the center, making the distance between the carding rollers 54 smaller. When the sliding plate 56 moves downward, the shape of the arranged sliding grooves 57 drives a number of cylinders 55 to disperse to the left and right sides, making the distance between the carding rollers 54 larger, so as to achieve the purpose of adjusting the distance.

[0035] In the above, the specific installation method, the connection method of the circuit and the control method of the first motor 591 adopted are all conventional designs. During the implementation process, it only needs to satisfy the rotation of the threaded rod 593, and the present invention will not elaborate in detail.

[0036] Specifically, in order to achieve the purpose of adjusting the tension of the chemical fiber blank, referring to Figure 3 , in this solution, the tension mechanism 7 includes a first rotating rod 74 and two second support plates 73. The two second support plates 73 are respectively fixedly connected to the upper sides of the rear parts of the mutually remote ends of the two support convex plates 6. The front ends of the two second support plates 73 are both rotatably connected to a first lead screw 77. The front ends of the two first lead screws 77 are both rotatably connected to a gear set 75. The two gear sets 75 are both composed of two meshing bevel gears. The first rotating rod 74 is rotatably connected to the upper side of the middle part between the opposite surfaces of the two support convex plates 6. The left end and the right end of the first rotating rod 74 both penetrate through the outer surface of the support convex plate 6 on the same side and extend to the outside. The left end and the right end of the first rotating rod 74 are both rotatably connected to the bevel gear in the same vertical direction. The front end of the first lead screw 77 on the left side penetrates through the bevel gear on the same side and extends to the outside.

[0037] Further, chute two 72 is provided on the upper sides of the left and right rear ends of the outer surfaces of the two supporting convex plates 6. A slider two 76 is slidably connected to the inner cavity of each of the two chute two 72. The ends of the two slider two 76 close to each other are rotatably connected together with a rotating roller two 78. A number of rubber bumps 79 are fixedly connected to the outer surface of the rotating roller two 78 in an annular array. The ends of the two slider two 76 away from each other are threadedly connected to the outer surface of the same side screw rod one 77. The upper side of the middle part of the left end of the supporting convex plate 6 is fixedly connected with a motor two 71. The output end of the motor two 71 is fixedly connected to the front end of the left side screw rod one 77 through a coupling.

[0038] In the above, the fabric passes through above the rotating roller one 4 and then passes through above the rotating roller two 78. By starting the motor two 71 to drive the left side screw rod one 77 to rotate, the two screw rod one 77 are driven to rotate through the action of the arranged gear set 75 and the rotating rod one 74, and then the two slider two 76 are driven to slide in the inner cavity of the chute two 72 at the same time, so as to achieve the purpose of adjusting the tension.

[0039] In the above, the specific installation method, the connection method of the circuit and the control method of the adopted motor two 71 are all conventional designs. During the implementation process, it only needs to satisfy the rotation of the screw rod one 77, and the present utility model will not elaborate in detail.

[0040] It should be particularly noted that the specific installation method, the connection method of the circuit and the control method of the adopted motor two 71 and the motor one 591 in the present utility model are all conventional designs, and the present utility model will not elaborate in detail.

[0041] The above shows and describes the basic principle, the main features and the advantages of the present utility model. Those skilled in the art of this industry should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A thread arranging machine for chemical fiber grey cloth, including a support base (1), characterized in that: Four corners of the lower end of the support base (1) are fixedly connected with support legs (2). On the upper part of the middle of the left and right sides of the outer surface of the support base (1), there are fixedly connected support convex plates (6). On the upper side of the middle of the ends of the two support convex plates (6) close to each other, there is fixedly connected a wire management mechanism (5). On the rear side of the upper part of the ends of the two support convex plates (6) away from each other, there are fixedly connected tension mechanisms (7). On the front part of the upper end of the support base (1), there is fixedly connected a pressing mechanism (3). Between the opposite surfaces of the two support convex plates (6), there is rotatably connected a rotating wheel (8) at the lower side of the rear part, and between the opposite surfaces of the two support convex plates (6), there is rotatably connected a first rotating roller (4) at the upper side of the front part.

2. The thread aligning machine for chemical fiber grey cloth according to claim 1, characterized in that: The support leg (2) includes two square columns (51). The two square columns (51) are respectively fixedly connected to the upper side of the middle between the opposite surfaces of the two support convex plates (6). On the rear side of the middle between the opposite surfaces of the two square columns (51), there are respectively provided first sliding grooves (52). On the upper side and the lower side of the middle between the opposite surfaces of the two square columns (51), there are fixedly connected support rods (53). A plurality of carding rollers (54) are slidably connected to the outer surfaces of the two support rods (53). In the middle of the rear ends of the plurality of carding rollers (54), there are fixedly connected cylinders (55). A slide plate (56) is slidably connected to the inner cavities of the two first sliding grooves (52). A plurality of sliding grooves (57) are formed on the outer surface of the slide plate (56). At the rear ends of the two square columns (51), there is fixedly connected a first support plate (58). In the middle of the rear end of the first support plate (58), there is fixedly connected a lifting mechanism (59).

3. The thread aligning machine for chemical fiber grey cloth according to claim 2, characterized in that: The plurality of sliding grooves (57) are arranged in a fan shape on the surface of the slide plate (56). The rear ends of the plurality of cylinders (55) are slidably connected to the inner cavities of the sliding grooves (57) on the same side.

4. A wire aligning machine for chemical fiber grey cloth according to claim 2, characterized in that: The lifting mechanism (59) includes a second fixing plate (595) and a first fixing plate (592). The second fixing plate (595) is fixedly connected to the lower side of the middle of the rear end of the first support plate (58). The first fixing plate (592) is fixedly connected to the upper side of the middle of the rear end of the first support plate (58). On the upper end of the first fixing plate (592), there is fixedly connected a first motor (591). A threaded rod (593) is rotatably connected to the upper end of the second fixing plate (595). A first slider (594) is threadedly connected to the outer surface of the threaded rod (593). A through hole (596) is formed in the middle of the rear end of the first support plate (58). The front end of the first slider (594) is fixedly connected to the middle of the rear end of the slide plate (56) through the through hole (596).

5. A thread arranging machine for chemical fiber grey cloth according to claim 1, characterized in that: The tension mechanism (7) includes a first rotating rod (74) and two second support plates (73). The two second support plates (73) are respectively fixedly connected to the upper sides of the rear ends of the two support convex plates (6) away from each other. The front ends of the two second support plates (73) are rotatably connected to a first lead screw (77). The front ends of the two first lead screws (77) are rotatably connected to a gear set (75). The two gear sets (75) are each composed of two meshing bevel gears. The first rotating rod (74) is rotatably connected to the upper side of the middle between the opposite surfaces of the two support convex plates (6). The left end and the right end of the first rotating rod (74) penetrate through the outer surface of the same-side support convex plate (6) and extend to the outside. The left end and the right end of the first rotating rod (74) are rotatably connected to the bevel gears in the vertical direction on the same side. The front end of the first lead screw (77) on the left side penetrates through the bevel gear on the same side and extends to the outside.

6. The wire aligning machine for chemical fiber grey cloth according to claim 5, wherein: On the upper sides of the left and right rear parts of the outer surfaces of the two support convex plates (6), second chutes (72) are respectively provided. The inner cavities of the two second chutes (72) are each slidably connected to a second slider (76). The mutually approaching ends of the two second sliders (76) are jointly rotatably connected to a second rotating roller (78). A plurality of rubber bumps (79) are fixedly connected to the outer surface of the second rotating roller (78) in an annular array. The mutually remote ends of the two second sliders (76) are each threadedly connected to the outer surface of the same-side first lead screw (77). The upper side of the middle of the left end of the support convex plate (6) is fixedly connected to a second motor (71). The output end of the second motor (71) is fixedly connected to the front end of the first lead screw (77) on the left side through a coupling.

7. A wire aligning machine for chemical fiber grey cloth according to claim 1, characterized in that: The pressing mechanism (3) includes two third support plates (31). The two third support plates (31) are respectively fixedly connected to the left and right sides of the front part of the upper end of the support base (1). The lower sides of the mutually approaching ends of the two third support plates (31) are jointly rotatably connected to a first roller (33). The middle parts of the outer surfaces of the two third support plates (31) are each provided with a third chute (36). The inner cavities of the two third chutes (36) are each slidably connected to a third slider (32). The mutually approaching ends of the two third sliders (32) are jointly rotatably connected to a second roller (34). The upper ends of the two third sliders (32) are each fixedly connected to a spring (35). The upper ends of the two springs (35) are respectively fixedly connected to the upper walls of the inner cavities of the third chutes (36). The middle parts of the upper walls of the inner cavities of the two third chutes (36) are each fixedly connected to a limiting rod (37).

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