Triple-folding device for alternately folding bath towel left and right

Abstract

The utility model relates to a three-folding device for alternately folding bath towels left and right, which comprises a left folding mechanism, a right folding mechanism, a suspended folding lining flange component and a bath towel laying and conveying mechanism, the bath towel laying and conveying mechanism comprises a left conveying belt, a middle conveying belt and a right conveying belt, and the suspended folding lining flange component is arranged above the middle conveying belt. The left material folding mechanism comprises a left material folding part, a left side channel allowing the left material folding part to ascend and descend in a matched mode is reserved between the left conveying belt and the middle conveying belt, the right material folding mechanism comprises a right material folding part, and a right side channel allowing the right material folding part to ascend and descend in a matched mode is reserved between the right conveying belt and the middle conveying belt. The left conveying belt, the middle conveying belt and the right conveying belt are arranged from front to back in a feeding mode and can be matched to convey laid materials from front to back, bath towels are folded three times after the laid materials are conveyed in place, the bath towels can be directly output through the middle conveying belt after being folded three times, the bath towels are separated from a suspended folding lining material blocking edge component, conveying and three times of folding are combined, and higher efficiency is achieved.

Description

Technical Field

[0001] This utility model relates to a three-fold device for alternating left and right folding of a bath towel. Background Technology

[0002] Bath towels (such as those made of regular towel material) are made of soft material, and are also longer and larger than regular towels. Additionally, some establishments, such as hotels, require bath towels to be provided in disposable packaging for better hygiene. Before bagging, the bath towels need to be folded to make them neater and easier to pack. How to supply bath towel materials and coordinate the folding process is a challenge. Utility Model Content

[0003] In view of the technical problems existing in the background art, the present invention aims to provide a three-fold device for alternating left and right folding of a bath towel.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a three-folding device for alternating left and right folding of bath towels, including a left folding mechanism, a right folding mechanism, a suspended folding lining edge guard component, and a bath towel laying conveyor mechanism. The bath towel laying conveyor mechanism includes a left conveyor belt, a middle conveyor belt, and a right conveyor belt that feed materials from front to back. The middle conveyor belt is located between the left and right conveyor belts. The suspended folding lining edge guard component is positioned above the middle conveyor belt. The left folding mechanism includes a left folding component that is raised, lowered, and moved left and right. A left passage is provided between the left and middle conveyor belts for the left folding component to be raised and lowered. The right folding mechanism includes a right folding component that is raised, lowered, and moved left and right. A right passage is provided between the right and middle conveyor belts for the right folding component to be raised and lowered.

[0005] The following optimizations or supplementary explanations can be made to the above technical solutions.

[0006] For example, the left conveyor belt, the middle conveyor belt, and the right conveyor belt are set to feed material synchronously and intermittently.

[0007] The front end of the suspended folded lining edge component is connected to the support component, and the rear end of the suspended folded lining edge component is the output free end.

[0008] For example, the suspended folding lining edge guard component includes a left suspended plate and a right suspended plate, the left and right positions of the left and / or right suspended plates are adjustable, and the left and right positions of the left and / or right suspended plates on the support component are adjustable; the front of the suspended folding lining edge guard component has a material inlet; there is a matching gap between the suspended folding lining edge guard component and the lower middle conveyor belt; the left side of the suspended folding lining edge guard component corresponds vertically to the left side of the middle conveyor belt, and the right side of the suspended folding lining edge guard component corresponds vertically to the right side of the middle conveyor belt.

[0009] In addition, it also includes a left support and a right support. The middle conveyor belt includes a middle left transfer belt and a middle right transfer belt. The left conveyor belt and the middle left transfer belt are set on the left support. The left channel is located between the left conveyor belt and the middle left transfer belt. The right conveyor belt and the middle right transfer belt are set on the right support. The right channel is located between the right conveyor belt and the middle right transfer belt. The left support is configured on the transverse track, and the right support is configured on the transverse track. The left support and the right support are also connected to the transverse shifting and adjusting transmission components respectively.

[0010] Further optimization includes an intermediate material support frame between the left and right supports. The left support has a left drive shaft, which is horizontally positioned and connected to the left conveyor belt and the middle left transfer belt. The right support has a right drive shaft, which is horizontally positioned and connected to the right conveyor belt and the middle right transfer belt. The left drive shaft also has a left input spur gear, and the right drive shaft also has a right input spur gear. Both the left and right drive shafts are equipped with a drive spindle, which is horizontally positioned and connected to the main conveyor motor. The drive spindle has a left output spur gear and a right output spur gear. The left input spur gear and the left output spur gear mesh and are connected, and can be adjusted horizontally relative to each other. The right input spur gear and the right output spur gear mesh and are connected, and can also be adjusted horizontally relative to each other.

[0011] For example, the left folding component includes a left folding rod, and the left folding component is also connected to a first lifting bracket, which is mounted on a first transverse support; the right folding component includes a right folding rod, and the right folding component is also connected to a second lifting bracket, which is mounted on a second transverse support.

[0012] For example, a first lifting drive cylinder is provided between the first lifting bracket and the first transverse support, and a second lifting drive cylinder is provided between the second lifting bracket and the second transverse support. The first transverse support is driven by a first transverse drive motor, which is driven by a first belt. The second transverse support is driven by a second transverse drive motor, which is driven by a second belt. The first lifting bracket includes a first transverse arm, and a left folding component is connected to the right end of the first transverse arm. The first transverse arm is located in front of and / or behind the left conveyor belt. The second lifting bracket includes a second transverse arm, and a right folding component is connected to the left end of the second transverse arm. The second transverse arm is located in front of and / or behind the right conveyor belt.

[0013] The beneficial effects of this utility model are as follows: the three-folding device for alternating left and right folding of bath towels is arranged with left, middle and right conveyor belts feeding material from front to back. It can cooperate to transport the laid-out material (i.e., bath towel) from front to back. After being transported to the correct position, it can cooperate to fold the bath towel into three parts. After the three folds are completed, it can be directly output by the middle conveyor belt and smoothly detach from the suspended folding lining edge guard. The combination of conveying and three-folding is more efficient. After the bath towel is folded into three parts, it is convenient for subsequent processing (such as folding it in half and / or bagging, etc.). Attached Figure Description

[0014] The following description, in conjunction with the accompanying drawings, details the embodiments and working principles of this utility model.

[0015] Figure 1 This is a three-dimensional structural diagram of the three-fold device for alternating left and right folding of a bath towel in this utility model.

[0016] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure from another angle.

[0017] Figure 3 for Figure 2 A schematic diagram of the three-dimensional structure from another angle.

[0018] In the picture:

[0019] 21. Left folding mechanism; 211. Left folding component; 2111. Left folding rod;

[0020] 212. First lifting support; 213. First transverse support; 214. First lifting drive cylinder; 215. First transverse drive motor; 216. First belt; 217. First transverse arm;

[0021] 22. Right-folding mechanism; 221. Right-folding component; 2211. Right-folding rod;

[0022] 222. Second lifting support; 223. Second transverse support; 224. Second lifting drive cylinder; 225. Second transverse drive motor; 226. Second belt; 227. Second transverse arm;

[0023] 23. Suspended folding lining edge guard component; 231. Support component; 232. Left suspended plate; 233. Right suspended plate; 24. Bath towel laying conveyor mechanism; 241. Left conveyor belt; 242. Middle conveyor belt; 243. Right conveyor belt;

[0024] 2421. Left-middle transfer belt; 2422. Right-middle transfer belt;

[0025] 251. Left channel; 252. Right channel; 253. Left support; 254. Right support; 255. Transverse track; 256. Transverse shifting and adjusting transmission component; 257. Intermediate material support frame; 2561. Bidirectional lead screw;

[0026] 26. Conveyor main motor; 261. Drive main shaft; 262. Left drive shaft; 263. Right drive shaft; 264. Left input spur gear; 265. Right input spur gear; 266. Left output spur gear; 267. Right output spur gear. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the implementation of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0028] Referring to the accompanying drawings, the three-folding device for alternating left and right folding of the bath towel in this embodiment includes a left folding mechanism 21, a right folding mechanism 22, a suspended folding lining edge guard component 23, and a bath towel laying and conveying mechanism 24.

[0029] The towel laying conveyor mechanism 24 includes a left conveyor belt 241, a middle conveyor belt 242, and a right conveyor belt 243, which are arranged to feed materials from front to back. The left conveyor belt 241, the middle conveyor belt 242, and the right conveyor belt 243 are arranged to feed materials from front to back, and can cooperate to transport materials (i.e., bath towels) that are laid out (e.g., flat) from front to back. Typically, the left conveyor belt 241, the middle conveyor belt 242, and the right conveyor belt 243 all feed materials horizontally from front to back.

[0030] The middle conveyor belt 242 is located between the left conveyor belt 241 and the right conveyor belt 243. The suspended folding lining edge guard component 23 is arranged above the middle conveyor belt 242. During the folding process, the suspended folding lining edge guard component 23 is used to line the inside of the bath towel and guard the edge of the folded edge of the bath towel from above. When the left and right areas of the bath towel are lifted upwards (folded), the middle area is relatively fixed and does not easily shift, so that the folding is stable and smooth, and the folded edges of the bath towel (left and right) can be relatively neat.

[0031] The left folding mechanism 21 includes a left folding component 211, which is configured to lift, move left and right. The left folding component 211 can lift and move left and right. A left passage 251 is provided between the left conveyor belt 241 and the middle conveyor belt 242 for the left folding component 211 to lift and move. When the left folding component 211 rises, it can lift the dividing position between the left area and the middle area of ​​the bath towel. The suspended folding lining edge blocking component 23 blocks the lining edge in the middle area of ​​the bath towel. Then the left folding component 211 moves to the right and finally folds (flips) the left area of ​​the bath towel onto the upper side of the middle area of ​​the bath towel. That is, the left area of ​​the bath towel is pushed to the right by the left folding component 211 and covers the middle area of ​​the bath towel. Then the left folding component 211 moves to the left to retract and descends to return to its original position, waiting for the next operation.

[0032] Similarly, the right folding mechanism 22 includes a right folding component 221, which is configured to lift and move left and right. That is, the right folding component 221 can lift and move left and right. A right passage 252 is left between the right conveyor belt 243 and the middle conveyor belt 242 for the right folding component 221 to lift and move. When the right folding component 221 rises, it can lift the dividing position between the right area and the middle area of ​​the bath towel. The suspended folding lining edge blocking component 23 blocks the lining edge in the middle area of ​​the bath towel. Then the right folding component 221 moves to the left to finally fold (flip) the right area of ​​the bath towel to the upper side of the middle area of ​​the bath towel. That is, the right area of ​​the bath towel is pushed to the left by the right folding component 221 and covers the middle area of ​​the bath towel. Then the right folding component 221 moves to the right to retract and descends to return to its original position, waiting for the next operation.

[0033] The left folding mechanism 21 and the right folding mechanism 22 operate alternately (set sequentially as needed), which can fold (flip over, cover) the left and right areas of the bath towel onto the middle area of ​​the bath towel to complete the three-fold structure of the bath towel.

[0034] This three-folding device for alternating left and right folding of bath towels is configured with a left conveyor belt 241, a middle conveyor belt 242, and a right conveyor belt 243 feeding materials from front to back. It can work together to transport the laid-out material (i.e., bath towel) from front to back. After being transported to the correct position, it can work together to fold the bath towel into three parts. After the three folds are completed, it can be directly output by the middle conveyor belt 242 and smoothly detach from the suspended folding lining edge guard component 23. The combination of conveying and three-folding is more efficient. After the bath towel is folded into three parts, it is easy to process it laterally (such as folding it in half and / or bagging it).

[0035] Based on the above embodiments, the following optimizations or further explanations can be made.

[0036] The front end of the suspended folded lining edge component 23 is connected to the support component 231 (such as a support crossbar, which can be used to install the equipment frame). The rear end of the suspended folded lining edge component 23 is the output free end, which is convenient for installation and for the three-folded bath towel to be output backward. The output is directly supported by the middle conveyor belt 242, and the output is not affected by the suspended folded lining edge component 23.

[0037] For example, the suspended folding lining edge guard component 23 includes a left suspended plate 232 and a right suspended plate 233. The left and right positions of the left suspended plate 232 and / or the right suspended plate 233 can be adjusted, for example, by tightening or loosening fasteners, so as to adapt to the different sizes of bath towels with different widths and triple-fold requirements after adjustment. For example, the left and right positions of the left suspended plate 232 and / or the right suspended plate 233 are adjusted on the support component 231.

[0038] Furthermore, it can be optimized by having a material inlet (such as an inlet arc surface) at the front of the suspended folding lining edge component 23, which facilitates the introduction and conveying of bath towels. A mating gap is maintained between the suspended folding lining edge component 23 and the lower middle conveyor belt 242. This gap allows the bath towel to pass smoothly between the bath towel laying conveyor mechanism 24 (such as the conveyor belt 242) and the suspended folding lining edge component 23. The suspended folding lining edge component 23 can also smoothly lining the edge during the folding process. The mating gap is usually set at the factory or during machine adjustment; even the height of the suspended folding lining edge component 23 can be adjusted to allow for timely adjustment of the mating gap.

[0039] For example, the left side of the suspended folding lining edge member 23 corresponds vertically to the left side of the middle conveyor belt 242, and the right side of the suspended folding lining edge member 23 corresponds vertically to the right side of the middle conveyor belt 242. When vertically aligned, they can be perfectly aligned, or slightly offset, as long as the folding components can move smoothly up and down and fold the material. For instance, the left side of the left suspended plate 232 corresponds vertically to the left side of the middle conveyor belt 242, and the right side of the right suspended plate 233 corresponds vertically to the right side of the middle conveyor belt 242.

[0040] Further optimization includes a three-folding device for alternating left and right folding of the bath towel, comprising a left support 253 and a right support 254. The central conveyor belt 242 includes a central left transfer belt 2421 and a central right transfer belt 2422. The left conveyor belt 241 and the central left transfer belt 2421 are mounted on the left support 253, with the left channel 251 located between the left conveyor belt 241 and the central left transfer belt 2421. The right conveyor belt 243 and the central right transfer belt 2422 are mounted on the right support 254, with the right channel 252... Located between the right conveyor belt 243 and the middle right transfer belt 2422, the left support 253 and the right support 254 are configured on the transverse track 255. The left conveyor belt 241 and the middle left transfer belt 2421 adjust their positions laterally along the transverse track 255 with the left support 253, and the right conveyor belt 243 and the middle right transfer belt 2422 adjust their positions laterally along the transverse track 255 with the right support 254, to meet the requirements of tri-folding bath towels of different widths and sizes. The transverse track 255 can be shared or configured separately. In addition to direct manual transverse movement, the left support 253 and the right support 254 can also be connected to transverse movement adjustment transmission components 256 respectively. Operating the transverse movement adjustment transmission components 256 drives them to perform corresponding transverse movement adjustments. The transverse movement adjustment transmission components 256 can be configured in various ways, such as using a lead screw (e.g., a two-way lead screw 2561) driven by a motor or handwheel, or a belt. In addition, an intermediate material support frame 257 can be provided between the left support 253 and the right support 254 so that the material (bath towel) can be supported between the middle left conveyor belt 2421 and the middle right conveyor belt 2422 to avoid sagging and make the operation more stable.

[0041] For example, the left conveyor belt 241, the middle conveyor belt 242, and the right conveyor belt 243 can be synchronously and intermittently fed. Each can be configured with its own power source (such as a motor), or they can share a common power source to drive the feeding operation.

[0042] For example, a left drive shaft 262 is provided on the left support 253. The left drive shaft 262 is arranged laterally and is connected to the left conveyor belt 241 and the middle left transfer belt 2421. The right drive shaft 263 rotates to drive the right conveyor belt 243 and the middle right transfer belt 2422. Similarly, a right drive shaft 263 is provided on the right support 254. The right drive shaft 263 is arranged laterally and is connected to the right conveyor belt 243 and the middle right transfer belt 2422. The right drive shaft 263 rotates to drive the right conveyor belt 243 and the middle right transfer belt 2422. Further improvements include a left input spur gear 264 on the left drive shaft 262, from which power is transmitted to drive the left drive shaft 262 to rotate. Similarly, a right input spur gear 265 is provided on the right drive shaft 263, from which power is transmitted to drive the right drive shaft 263 to rotate. Both the left and right drive shafts 262 and 263 are equipped with a drive spindle 261, which is horizontally positioned and connected to a main conveyor motor 26 (such as a servo motor). The main conveyor motor 26 drives the drive spindle 261 to rotate. The drive spindle 261 has a left output spur gear 266 and a right output spur gear 267. The left input spur gear 264 meshes with the left output spur gear 266 and can be adjusted horizontally. The right input spur gear 265 meshes with the right output spur gear 267. The gear 267 is engaged with the transmission and can be adjusted laterally. The drive shaft 261 drives the left input spur gear 264 to rotate through the left output spur gear 266, and drives the right input spur gear 265 to rotate through the right output spur gear 267. The spur gear structure can be adjusted laterally. The transmission can still be maintained when the left input spur gear 264 adjusts its position laterally with the left drive shaft 262 and the left support 253, and the transmission can still be maintained when the right input spur gear 265 adjusts its position laterally with the right drive shaft 263 and the right support 254. In this drive structure, a main conveyor motor 26 drives the left conveyor belt 241, the middle conveyor belt 242 and the right conveyor belt 243 to run synchronously, and can meet the lateral movement requirements (i.e., lateral adjustment requirements) of the left support 253 and the right support 254.

[0043] For example, the left folding component 211 includes a left folding rod 2111 and is also connected to a first lifting bracket 212. The first lifting bracket 212 is mounted on a first transverse support 213. The first lifting bracket 212 moves up and down on the first transverse support 213 and moves laterally with the first transverse support 213, thereby realizing the lifting and lateral movement of the left folding component 211 (including the left folding rod 2111). Similarly, the right folding component 221 includes a right folding rod 2211 and is also connected to a second lifting bracket 222. The second lifting bracket 222 is mounted on a second transverse support 223 and moves up and down on the second transverse support 223. The second lifting bracket 222 moves laterally with the second transverse support 223, thereby realizing the lifting and lateral movement of the right folding component 221 (including the right folding rod 2211). There are many driving components for lifting and lateral movement. For example, a first lifting drive cylinder 214 is provided between the first lifting bracket 212 and the first lateral movement bracket 213, and a second lifting drive cylinder 224 is provided between the second lifting bracket 222 and the second lateral movement bracket 223. The lifting and lowering actions can be performed by the corresponding lifting drive cylinder (such as its piston rod extension and retraction). The first lateral movement bracket 213 is driven by a first lateral movement drive motor 215 (such as a servo motor). The first lateral movement drive motor 215 is driven by the first lateral movement bracket 213 through a first belt 216. The second lateral movement bracket 223 is driven by a second lateral movement drive motor 225 (such as a servo motor). The second lateral movement drive motor 225 is driven by the second belt 226. The corresponding lateral movement distances are easy to control.

[0044] Furthermore, for ease of assembly and to avoid misalignment, the first lifting bracket 212 includes a first transverse arm 217, with the left folding component 211 connected to the right end of the first transverse arm 217, and the first transverse arm 217 located in front of and / or behind the left conveyor belt 241; the second lifting bracket 222 includes a second transverse arm 227, with the right folding component 221 connected to the left end of the second transverse arm 227, and the second transverse arm 227 located in front of and / or behind the right conveyor belt 243; in this structure, the left conveyor belt 241 and the suspended folding lining edge guard component 23 can be smoothly avoided during the lifting and lowering and left and right movement of the left folding component 211, and the right conveyor belt 243 and the suspended folding lining edge guard component 23 can be smoothly avoided during the lifting and lowering and left and right movement of the right folding component 221.

Claims

1. A three-fold towel folding device for alternating left and right folding, comprising a left folding mechanism (21), a right folding mechanism (22), a suspended folding lining blocking component (23) and a towel laying and conveying mechanism (24), characterized in that: the towel laying and conveying mechanism (24) comprises a left conveying belt (241), a middle conveying belt (242) and a right conveying belt (243) arranged from front to back, the middle conveying belt (242) is located between the left conveying belt (241) and the right conveying belt (243), the suspended folding lining blocking component (23) is arranged above the middle conveying belt (242), the left folding mechanism (21) comprises a left folding component (211) arranged to be lifted and moved left and right, a left side passage (251) is left between the left conveying belt (241) and the middle conveying belt (242) for the left folding component (211) to be lifted and moved, the right folding mechanism (22) comprises a right folding component (221) arranged to be lifted and moved left and right, a right side passage (252) is left between the right conveying belt (243) and the middle conveying belt (242) for the right folding component (221) to be lifted and moved, 2. The towel alternating left and right three-fold folding apparatus of claim 1 wherein: the left conveying belt (241), the middle conveying belt (242) and the right conveying belt (243) are arranged to be intermittently fed synchronously.

3. The towel alternating left and right three-fold folding apparatus as claimed in claim 1, wherein: the front end of the suspended folding lining blocking component (23) is connected to a support component (231), and the rear end of the suspended folding lining blocking component (23) is a free output end.

4. The three-fold towel folding device for alternating left and right folding according to claim 3, characterized in that: the suspended folding lining blocking component (23) comprises a left suspended plate (232) and a right suspended plate (233), and the left and right positions of the left suspended plate (232) and / or the right suspended plate (233) are arranged to be adjusted, the front part of the suspended folding lining blocking component (23) has a material guiding part, a matching gap is left between the suspended folding lining blocking component (23) and the middle conveying belt (242) below, the left side of the suspended folding lining blocking component (23) corresponds to the left side of the middle conveying belt (242) up and down, the right side of the suspended folding lining blocking component (23) corresponds to the right side of the middle conveying belt (242) up and down.

5. The towel alternating left and right three-fold apparatus of claim 1 wherein: further comprising a left bracket (253) and a right bracket (254), and the middle conveying belt (242) comprises a middle left conveying belt (2421) and a middle right conveying belt (2422), the left conveying belt (241) and the middle left conveying belt (2421) are arranged on the left bracket (253), and the left side passage (251) is located between the left conveying belt (241) and the middle left conveying belt (2421), the right conveying belt (243) and the middle right conveying belt (2422) are arranged on the right bracket (254), and the right side passage (252) is located between the right conveying belt (243) and the middle right conveying belt (2422), the left bracket (253) is arranged on a horizontal rail (255), and the right bracket (254) is arranged on the horizontal rail (255). The left support (253) and the right support (254) are also respectively connected with the horizontal moving and position adjusting transmission component (256).

6. The three-fold towel folding device according to claim 5, wherein: The left support (253) and the right support (254) are also respectively connected with the horizontal moving and position adjusting transmission component (256). The left support (253) and the right support (254) are also respectively connected with the horizontal moving and position adjusting transmission component (256). The left support (253) and the right support (254) are also respectively connected with the horizontal moving and position adjusting transmission component (256). The left support (253) and the right support (254) are also respectively connected with the horizontal moving and position adjusting transmission component (256). The left support (253) and the right support (254) are also respectively connected with the horizontal moving and position adjusting transmission component (256). The left support (253) and the right support (254) are also respectively connected with the horizontal moving and position adjusting transmission component (256). The left support (253) and the right support (254) are also respectively connected with the horizontal moving and position adjusting transmission component (256). The left support (253) and the right support (254) are also respectively connected with the horizontal moving and position adjusting transmission component (256). The left support (253) and the right support (254) are also respectively connected with the horizontal moving and position adjusting transmission component (256). The left support (253) and the right support (254) are also respectively connected with the horizontal moving and position adjusting transmission component (256). The left support (253) and the right support (254) are also respectively connected with the horizontal moving and position adjusting transmission component (256).

7. The three-fold towel folding device according to claim 1, wherein: The left folding component (211) comprises a left folding rod (2111), and the left folding component (211) is also connected with a first lifting support (212) arranged on a first horizontal moving support (213). The right folding component (221) comprises a right folding rod (2211), and the right folding component (221) is also connected with a second lifting support (222) arranged on a second horizontal moving support (223).

8. The three-fold towel folding device according to claim 7, wherein: The first lifting support (212) and the first horizontal moving support (213) are provided with a first lifting driving cylinder (214). The second lifting support (222) and the second horizontal moving support (223) are provided with a second lifting driving cylinder (224). The first horizontal moving support (213) is transmissionally connected with a first horizontal moving driving motor (215) transmissionally connected with the first horizontal moving support (213) through a first belt (216). The second horizontal moving support (223) is transmissionally connected with a second horizontal moving driving motor (225) transmissionally connected with the second horizontal moving support (223) through a second belt (226). The first lifting support (212) comprises a first transverse arm (217), the left folding component (211) is connected to the right end of the first transverse arm (217), and the first transverse arm (217) is located at the front side and / or rear side of the left conveying belt (241), The second lifting support (222) comprises a second transverse arm (227), the right folding component (221) is connected to the left end of the second transverse arm (227), and the second transverse arm (227) is located at the front side and / or rear side of the right conveying belt (243).

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