Product conveying device

Abstract

The utility model belongs to the technical field of product transportation, and particularly relates to a product conveying device which comprises a conveying line and a posture adjusting mechanism, the posture adjusting mechanism comprises a first overturning module and a second overturning module, and the first overturning module and the second overturning module are located on the two sides of the conveying line respectively. When the product in the vertical posture moves to the position between the first pushing and overturning module and the second pushing and overturning module, under the action of the first pushing force applied by the first pushing and overturning module and the second pushing force applied by the second pushing and overturning module, the product is pushed and overturned to be in the horizontal posture from the vertical posture, and therefore it is guaranteed that the product can be safely conveyed by the conveying line in the follow-up process. Products conveyed by the conveying line are adjusted from a vertical posture to a horizontal posture through the posture adjusting mechanism, so that it is guaranteed that the conveying line can safely convey the products, compared with manual adjustment, automatic adjustment of the postures of the products can be achieved, the working efficiency is high, and therefore the production efficiency of the products can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of product transportation, in particular to a product conveying device. Background Art

[0002] For cylindrical products such as boxed beverages and medicine boxes, during the product production process, the products flowing out from the upstream processing station are generally in an upright position. In order to ensure the subsequent safe transportation of the products, the products placed in an upright position on the conveyor line need to be adjusted to a flat position.

[0003] As described above, in the prior art, product posture adjustment is generally performed manually. Specifically, workers manually adjust products placed in an upright posture on the conveyor line to a flat posture, but the efficiency of manual work is low, resulting in reduced product production efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a product conveying device to solve the problem of low efficiency in manually adjusting products placed in an upright position on a conveyor line to a flat position, thereby reducing the production efficiency of the products.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] Product conveying device, including:

[0007] a conveyor line configured to convey upright products; and

[0008] The posture adjustment mechanism includes a first overturning module and a second overturning module, the first overturning module and the second overturning module are respectively located on both sides of the conveyor line along a first direction, the first direction is perpendicular to the conveying direction of the conveyor line, the first overturning module is configured to apply a first thrust to one side of the product along the first direction, and the second overturning module is configured to apply a second thrust to the other side of the product along the first direction, the first thrust and the second thrust are in opposite directions, and the point of action of the first thrust on the product and the point of action of the second thrust on the product have a height difference.

[0009] Preferably, the first overturning module includes a first air nozzle, and the second overturning module includes a second air nozzle. The first air nozzle and the second air nozzle are respectively located on both sides of the conveying line along the first direction, and the first air nozzle and the second air nozzle have a height difference. The first air nozzle can blow air along the first direction toward the side close to the second air nozzle, and the second air nozzle can blow air along the first direction toward the side close to the first air nozzle.

[0010] Preferably, the first overturning module further includes a first air pipe, the first air pipe extending along the first direction, one end of the first air pipe being connected to the first air nozzle, and the other end of the first air pipe forming a first air outlet;

[0011] The second overturning module further includes a second air pipe extending along the first direction, one end of the second air pipe being connected to the second air nozzle, and the other end of the second air pipe forming a second air outlet.

[0012] Preferably, the posture adjustment mechanism also includes a first baffle and a second baffle, the first baffle and the second baffle are arranged opposite to each other along the first direction, a first through-hole is provided on the first baffle, and an end of the first air pipe away from the first air nozzle is inserted into the first through-hole, and a second through-hole is provided on the second baffle, and an end of the second air pipe away from the second air nozzle is inserted into the second through-hole.

[0013] Preferably, the first overturning module also includes a first mounting plate, the first mounting plate is provided with a first mounting hole, the second overturning module also includes a second mounting plate, the second mounting plate is provided with a second mounting hole, the second mounting hole is higher than the first mounting hole, the first gas nozzle is mounted on the first mounting plate through the first mounting hole, and the second gas nozzle is mounted on the second mounting plate through the second mounting hole.

[0014] Preferably, the first mounting plate is further provided with a third mounting hole, and the second mounting plate is further provided with a fourth mounting hole. The third mounting hole is at the same height as the second mounting hole, and the fourth mounting hole is at the same height as the first mounting hole. The first gas nozzle can also be installed on the first mounting plate through the third mounting hole, and the second gas nozzle can also be installed on the second mounting plate through the fourth mounting hole.

[0015] Preferably, the posture adjustment mechanism further includes a third baffle, which is disposed between the first overturning module and the second overturning module and is configured to stop the upright product between the first overturning module and the second overturning module.

[0016] Preferably, there is a distance between the third baffle and the conveying line, and the distance is greater than or equal to the height of the flat product.

[0017] Preferably, the product conveying device further comprises a guide mechanism, which is provided on the conveying line and located downstream of the posture adjustment mechanism, and is configured to guide the product conveyed along the conveying line.

[0018] Preferably, the guide mechanism includes a first guide plate and a second guide plate, the first guide plate and the second guide plate are arranged opposite to each other along the first direction, the first guide plate includes a first plate portion and a second plate portion, the second guide plate includes a third plate portion and a fourth plate portion, the first plate portion is located on the side of the second plate portion away from the posture adjustment mechanism, the third plate portion is located on the side of the fourth plate portion away from the posture adjustment mechanism, the spacing between the second plate portion and the fourth plate portion gradually decreases from the side close to the posture adjustment mechanism to the side away from the posture adjustment mechanism, and the first plate portion and the third plate portion both extend along the conveying direction of the conveyor line.

[0019] Beneficial effects of the utility model:

[0020] In the present invention, a first overturning module and a second overturning module are respectively provided on both sides of the conveyor line. When a product in an upright position moves between the first overturning module and the second push rod module, the product is overturned from the upright position to a horizontal position under the action of the first thrust applied by the first overturning module and the second thrust applied by the second overturning module, thereby ensuring that the conveyor line can subsequently safely transport the product. The present invention adjusts the product being transported by the conveyor line from an upright position to a horizontal position through a posture adjustment mechanism, thereby ensuring that the conveyor line can safely transport the product. Compared to manual adjustment, this embodiment can achieve automatic adjustment of the product's posture, with higher work efficiency, thereby improving product production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is one of the structural diagrams of the product conveying device in the embodiment of the present utility model;

[0022] Figure 2 This is the second structural diagram of the product conveying device in the embodiment of the present utility model.

[0023] In the picture:

[0024] 100. Product; 1. Conveyor line; 2. Posture adjustment mechanism; 21. First overturning module; 211. First air nozzle; 212. First air pipe; 213. First mounting plate; 2131. First mounting hole; 2132. Third mounting hole; 22. Second overturning module; 221. Second air nozzle; 222. Second air pipe; 223. Second mounting plate; 2231. Second mounting hole; 2232. Fourth mounting hole; 23. First baffle; 231. First through-hole; 24. Second baffle; 241. Second through-hole; 25. Third baffle; 3. Guide mechanism; 31. First guide plate; 311. First plate portion; 312. Second plate portion; 32. Second guide plate; 321. Third plate portion; 322. Fourth plate portion. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0026] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0027] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0028] In the description of this embodiment, terms such as "upper," "lower," "right," and "left" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0029] For conveying cylindrical products such as boxed beverages, medicine boxes, etc., please refer to Figure 1 and Figure 2, this embodiment provides a product conveying device, which includes a conveyor line 1 and a posture adjustment mechanism 2, wherein the conveyor line 1 is configured to convey upright products 100. For example, in this embodiment, the conveyor line 1 is a belt conveyor, and the posture adjustment mechanism 2 includes a first overturning module 21 and a second overturning module 22, the first overturning module 21 and the second overturning module 22 are respectively located on both sides of the conveyor line 1 along a first direction, and the first direction is perpendicular to the conveying direction of the conveyor line 1. The conveyor line 1 can convey the product 100 between the first overturning module 21 and the second overturning module 22, the first overturning module 21 is configured to apply a first thrust to one side of the product 100 along the first direction, and the second overturning module 22 is configured to apply a second thrust to the other side of the product 100 along the first direction, the first thrust and the second thrust are in opposite directions, and the point of action of the first thrust on the product 100 and the point of action of the second thrust on the product 100 have a height difference, under the action of the first thrust and the second thrust, the product 100 can be pushed down, thereby adjusting from an upright posture to a flat posture.

[0030] Specifically, in this embodiment, the conveyor line 1 conveys the product 100 along the second direction, and the conveyor line 1 is respectively provided with a first overturning module 21 and a second overturning module 22 on both sides of the first direction perpendicular to the second direction. When the product 100 in an upright posture moves between the first overturning module 21 and the second push rod module, under the action of the first thrust applied by the first overturning module 21 and the second thrust applied by the second overturning module 22, the product 100 is overturned from the upright posture to the flat posture, thereby ensuring that the conveyor line 1 can subsequently safely convey the product 100.

[0031] As described above, this embodiment uses the posture adjustment mechanism 2 to adjust the product 100 being conveyed by the conveyor line 1 from an upright posture to a horizontal posture, thereby ensuring that the conveyor line 1 can safely convey the product 100. Compared to manual adjustment, this embodiment can automatically adjust the posture of the product 100, which is more efficient and can improve the production efficiency of the product 100.

[0032] Among them, the first overturning module 21 includes a first air nozzle 211, and the second overturning module 22 includes a second air nozzle 221. The first air nozzle 211 and the second air nozzle 221 are respectively located on both sides of the conveyor line 1 along the first direction. The conveyor line 1 can convey the upright product 100 to between the first air nozzle 211 and the second air nozzle 221. The first air nozzle 211 can blow air along the first direction toward the side close to the second air nozzle 221, thereby applying a first thrust to the product 100. The second air nozzle 221 can blow air along the first direction toward the side close to the first air nozzle 211, thereby applying a second thrust to the product 100. Moreover, the first air nozzle 211 and the second air nozzle 221 have a height difference, that is, the first air nozzle 211 and the second air nozzle 221 can blow air to the product 100 at different heights, respectively, so that the point of action of the first thrust on the product 100 and the point of action of the second thrust on the product 100 have a height difference, thereby enabling the product 100 to be pushed over.

[0033] Illustratively, in this embodiment, the first air nozzle 211 is lower than the second air nozzle 221, that is, the first air nozzle 211 can blow air toward the bottom of the upright product 100, thereby applying a first thrust to the bottom of the upright product 100, while the second air nozzle 221 can blow air toward the top of the upright product 100, thereby applying a second thrust to the top of the upright product 100. Moreover, since the first air nozzle 211 and the second air nozzle 221 blow air toward both sides of the product 100 along the first direction respectively, the first thrust and the second thrust act on both sides of the product 100 along the first direction respectively, and the directions of the first thrust and the second thrust are opposite, so that the upright product 100 can be pushed down.

[0034] As described above, the first overturning module 21 also includes a first mounting plate 213, and the first mounting plate 213 is provided with a first mounting hole 2131. The second overturning module 22 also includes a second mounting plate 223, and the second mounting plate 223 is provided with a second mounting hole 2231. The second mounting hole 2231 is higher than the first mounting hole 2131. The first air nozzle 211 is installed on the first mounting plate 213 through the first mounting hole 2131, and the second air nozzle 221 is installed on the second mounting plate 223 through the second mounting hole 2231, so that the first air nozzle 211 is lower than the second air nozzle 221, and the first air nozzle 211 and the second air nozzle 221 can blow air to the product 100 at different heights respectively.

[0035] Illustratively, the first gas nozzle 211 is mounted on the first mounting plate 213 by fastening a bolt in the first mounting hole 2131 , and the second gas nozzle 221 is mounted on the second mounting plate 223 by fastening a bolt in the second mounting hole 2231 .

[0036] Furthermore, the first overturning module 21 also includes a first air pipe 212, which extends along the first direction, and one end of the first air pipe 212 is connected to the first air nozzle 211, and the other end of the first air pipe 212 forms a first air outlet. The second overturning module 22 also includes a second air pipe 222, which extends along the first direction, and one end of the second air pipe 222 is connected to the second air nozzle 221, and the other end of the second air pipe 222 forms a second air outlet, so that when the product 100 is transported between the first overturning module 21 and the second overturning module 22, the air outlet positions of the first overturning module 21 and the second overturning module 22 are closer to the product 100, thereby ensuring that the first thrust and the second thrust applied to the product 100 by the first overturning module 21 and the second overturning module 22 are sufficient to push the product 100 over.

[0037] In addition, it is worth noting that the product conveying device also includes a guide mechanism 3, which is arranged on the conveyor line 1 and is located on the downstream side of the posture adjustment mechanism 2. The guide mechanism 3 is configured to guide the product 100 conveyed along the conveyor line 1, thereby guiding the product 100 to move accurately along the second direction, thereby further ensuring that the conveyor line 1 can safely convey the product 100.

[0038] Based on the above, the guide mechanism 3 includes a first guide plate 31 and a second guide plate 32. The first guide plate 31 and the second guide plate 32 are arranged opposite to each other along the first direction. The first guide plate 31 includes a first plate portion 311 and a second plate portion 312. The second guide plate 32 includes a third plate portion 321 and a fourth plate portion 322. The first plate portion 311 is located on a side of the second plate portion 312 away from the posture adjustment mechanism 2, and the third plate portion 321 is located on a side of the fourth plate portion 322 away from the posture adjustment mechanism 2. The distance between the second plate portion 312 and the fourth plate portion 322 gradually decreases from the side close to the posture adjustment mechanism 2 to the side away from the posture adjustment mechanism 2. The first plate portion 311 and the third plate portion 321 both extend along the conveying direction of the conveyor line 1, and the pushed-down product 100 can first be conveyed between the second plate portion 312 and the fourth plate portion 322. Among them, for the product 100 whose position on the conveyor line 1 is shifted due to being blown by the first air nozzle 211 and / or the second air nozzle 221, the position of the product 100 can be corrected by the second plate portion 312 and the fourth plate portion 322. After the product 100 moves between the first plate portion 311 and the third plate portion 321, the first plate portion 311 and the third plate portion 321 can prevent the product 100 from shifting relative to the conveyor line 1 along the first direction.

[0039] In addition, the posture adjustment mechanism 2 also includes a first baffle 23 and a second baffle 24, which are arranged opposite to each other along a first direction. The first baffle 23 and the second baffle 24 can stop the product 100, thereby preventing the product 100 from being blown by the first air nozzle 211 and / or the second air nozzle 221, causing a large deviation in its position on the conveyor line 1.

[0040] From the above, in order to avoid affecting the first air nozzle 211 and the second air nozzle 221 from blowing air toward the product 100, a first through-hole 231 is provided on the first baffle 23, and the end of the first air pipe 212 away from the first air nozzle 211 is inserted into the first through-hole 231; a second through-hole 241 is provided on the second baffle 24, and the end of the second air pipe 222 away from the second air nozzle 221 is inserted into the second through-hole 241.

[0041] It is worth noting that in this embodiment, the side of the second plate portion 312 away from the first plate portion 311 and the side of the fourth plate portion 322 away from the third plate portion 321 are respectively docked with the first baffle 23 and the second baffle 24, so that the product 100 can flow smoothly between the first guide plate 31 and the second guide plate 32.

[0042] In addition, the posture adjustment mechanism 2 also includes a third baffle 25, which is arranged between the first overturning module 21 and the second overturning module 22, and is configured to stop the upright product 100 between the first overturning module 21 and the second overturning module 22, thereby ensuring that the first overturning module 21 and the second push rod module can effectively push the product 100 down.

[0043] Moreover, there is a distance between the third baffle 25 and the conveyor line 1, and the distance is greater than or equal to the height of the flat product 100, so that the pushed-down product 100 can pass under the third baffle 25 and then flow to the downstream side of the conveyor line 1.

[0044] Based on the content mentioned above, in this embodiment, the first mounting plate 213 is provided with a first mounting hole 2131, and the second mounting plate 223 is provided with a second mounting hole 2231. The first gas nozzle 211 is installed on the first mounting plate 213 through the first mounting hole 2131, and the second gas nozzle 221 is installed on the second mounting plate 223 through the second mounting hole 2231. The first gas nozzle 211 is lower than the second gas nozzle 221. In addition to the first mounting hole 2131, the first mounting plate 213 is also provided with a third mounting hole 2132. Correspondingly, in addition to the second mounting hole 2231, the second mounting plate 223 is also provided with a fourth mounting hole 2232, wherein the third mounting hole 2132 is at the same height as the second mounting hole 2231, and the fourth mounting hole 2232 is at the same height as the first mounting hole 2131. The first air nozzle 211 can also be installed on the first mounting plate 213 through the third mounting hole 2132, and the second air nozzle 221 can also be installed on the second mounting plate 223 through the fourth mounting hole 2232. That is, in this embodiment, the staff can also adjust the second air nozzle 221 to be lower than the first air nozzle 211 according to specific needs, so that the first air nozzle 211 blows air toward the top of the upright product 100, and the second air nozzle 221 blows air toward the bottom of the upright product 100, thereby pushing the product 100 down.

[0045] Specifically, if the product 100 sent by the conveyor line 1 to the downstream workstation needs to be placed in a flat posture with the front side facing up and the back side facing down, the first air nozzle 211 is installed lower than the second air nozzle 221. If the product 100 sent by the conveyor line 1 to the downstream workstation needs to be placed in a flat posture with the back side facing up and the front side facing down, the second air nozzle 221 is adjusted to be installed lower than the first air nozzle 211.

[0046] From the above, it should be noted that two first perforations 231 are provided on the first baffle 23, and the two first perforations 231 are arranged at intervals in the vertical direction, and are respectively arranged corresponding to the first mounting hole 2131 and the third mounting hole 2132, so that after adjustment, the first air pipe 212 connected to the first air nozzle 211 can still blow air toward the product 100, and two second perforations 241 are provided on the second baffle 24, and the two second perforations 241 are arranged at intervals in the vertical direction, and are respectively arranged corresponding to the second mounting hole 2231 and the fourth mounting hole 2232, so that after adjustment, the second air pipe 222 connected to the second air nozzle 221 can still blow air toward the product 100.

[0047] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Product conveying device, characterized in that, include: A conveyor line (1) configured to convey upright products (100); and The posture adjustment mechanism (2) comprises a first overturning module (21) and a second overturning module (22), wherein the first overturning module (21) and the second overturning module (22) are respectively located on both sides of the conveyor line (1) along a first direction, wherein the first direction is perpendicular to the conveying direction of the conveyor line (1), the first overturning module (21) is configured to apply a first thrust to one side of the product (100) along the first direction, and the second overturning module (22) is configured to apply a second thrust to the other side of the product (100) along the first direction, the first thrust and the second thrust are in opposite directions, and a point of action of the first thrust on the product (100) and a point of action of the second thrust on the product (100) have a height difference.

2. The product conveying device according to claim 1, characterized in that: The first overturning module (21) includes a first air nozzle (211), and the second overturning module (22) includes a second air nozzle (221). The first air nozzle (211) and the second air nozzle (221) are respectively located on both sides of the conveying line (1) along a first direction, and the first air nozzle (211) and the second air nozzle (221) have a height difference. The first air nozzle (211) can blow air along the first direction toward a side close to the second air nozzle (221), and the second air nozzle (221) can blow air along the first direction toward a side close to the first air nozzle (211).

3. The product conveying device according to claim 2, characterized in that: The first overturning module (21) further includes a first air pipe (212), the first air pipe (212) extending along the first direction, one end of the first air pipe (212) communicating with the first air nozzle (211), and the other end of the first air pipe (212) forming a first air outlet; The second overturning module (22) further comprises a second air pipe (222), the second air pipe (222) extending along the first direction, one end of the second air pipe (222) being in communication with the second air nozzle (221), and the other end of the second air pipe (222) forming a second air outlet.

4. The product conveying device according to claim 3, characterized in that: The posture adjustment mechanism (2) further comprises a first baffle (23) and a second baffle (24), wherein the first baffle (23) and the second baffle (24) are arranged opposite to each other along the first direction, a first through-hole (231) is provided on the first baffle (23), and an end of the first air pipe (212) away from the first air nozzle (211) is inserted into the first through-hole (231), and a second through-hole (241) is provided on the second baffle (24), and an end of the second air pipe (222) away from the second air nozzle (221) is inserted into the second through-hole (241).

5. The product conveying device according to claim 2, characterized in that: The first overturning module (21) further comprises a first mounting plate (213), the first mounting plate (213) being provided with a first mounting hole (2131), the second overturning module (22) further comprises a second mounting plate (223), the second mounting plate (223) being provided with a second mounting hole (2231), the second mounting hole (2231) being higher than the first mounting hole (2131), the first gas nozzle (211) being mounted on the first mounting plate (213) through the first mounting hole (2131), and the second gas nozzle (221) being mounted on the second mounting plate (223) through the second mounting hole (2231).

6. The product conveying device according to claim 5, characterized in that: The first mounting plate (213) is further provided with a third mounting hole (2132), and the second mounting plate (223) is further provided with a fourth mounting hole (2232). The third mounting hole (2132) is in the same height as the second mounting hole (2231), and the fourth mounting hole (2232) is in the same height as the first mounting hole (2131). The first gas nozzle (211) can also be installed on the first mounting plate (213) through the third mounting hole (2132), and the second gas nozzle (221) can also be installed on the second mounting plate (223) through the fourth mounting hole (2232).

7. The product conveying device according to claim 1, characterized in that: The posture adjustment mechanism (2) further includes a third baffle (25), which is disposed between the first overturning module (21) and the second overturning module (22) and is configured to stop the upright product (100) between the first overturning module (21) and the second overturning module (22).

8. The product conveying device according to claim 7, characterized in that: There is a distance between the third baffle (25) and the conveying line (1), and the distance is greater than or equal to the height of the flat product (100).

9. The product conveying device according to claim 1, characterized in that: The product conveying device further comprises a guide mechanism (3), which is arranged on the conveying line (1) and located downstream of the posture adjustment mechanism (2), and the guide mechanism (3) is configured to guide the product (100) conveyed along the conveying line (1).

10. The product conveying device according to claim 9, characterized in that: The guide mechanism (3) includes a first guide plate (31) and a second guide plate (32), the first guide plate (31) and the second guide plate (32) are arranged relative to each other along the first direction, the first guide plate (31) includes a first plate portion (311) and a second plate portion (312), the second guide plate (32) includes a third plate portion (321) and a fourth plate portion (322), the first plate portion (311) is located on a side of the second plate portion (312) away from the posture adjustment mechanism (2), the third plate portion (321) is located on a side of the fourth plate portion (322) away from the posture adjustment mechanism (2), the spacing between the second plate portion (312) and the fourth plate portion (322) gradually decreases from the side close to the posture adjustment mechanism (2) to the side away from the posture adjustment mechanism (2), and the first plate portion (311) and the third plate portion (321) both extend along the conveying direction of the conveyor line (1).

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