Double-layer conveying line and double-layer edge trimming machine

Abstract

The application discloses a double-layer conveying line and a double-layer edge surrounding machine, wherein the double-layer conveying line comprises a rack, and the rack is provided with an upper conveying line and a lower conveying line; the upper conveying line comprises an upper conveying machine and a secondary conveying assembly arranged side by side, the secondary conveying assembly has at least two secondary conveying surfaces, any two secondary conveying surfaces have a feeding gap therebetween, and an upper turnover rod capable of swinging up and down is arranged in the feeding gap; the lower conveying line comprises a sub-conveying assembly and a main conveying assembly, the sub-conveying assembly has a sub-conveying surface capable of swinging up and down, the main conveying assembly has at least two main conveying surfaces, any two main conveying surfaces have a conveying gap therebetween, and a lower turnover rod capable of swinging up and down is arranged in the conveying gap; the application can reduce the space required when a mattress is turned over, is favorable for reducing the space required by the whole equipment, and improves the stability of the mattress turning over in the turning over process since the inclined sub-conveying surface supports the mattress.

Description

TECHNICAL FIELD

[0001] The present application relates to a sewing device, in particular to a double-layer conveying line and a double-layer edging machine. BACKGROUND

[0002] In the process of producing a mattress, the mattress needs to be edging processed. Since both sides of the mattress need to be edging processed, after one side of the mattress is processed, the mattress needs to be flipped over and then the other side is processed. With the development of technology, there are machines on the market that can automatically edge process the mattress. However, the existing mechanical equipment occupies a large space when flipping the mattress, which reduces the space for the upward extension of the mechanical equipment and increases the production land cost. SUMMARY

[0003] The present application aims to provide a double-layer conveying line and a double-layer edging machine to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0004] The solution to the technical problem of the present application is:

[0005] A double-layer conveying line, comprising a rack, the rack is provided with: an upper conveying line, comprising an upper conveying machine and a secondary conveying assembly arranged side by side, the direction from the secondary conveying assembly to the upper conveying machine is a feeding direction, the secondary conveying assembly has at least two secondary conveying surfaces arranged horizontally and spaced apart perpendicularly to the feeding direction, any two secondary conveying surfaces have a feeding gap therebetween, the feeding gap is provided with an upper flipping lever that can swing up and down, the swing fulcrum of the upper flipping lever is located in the feeding gap close to one side of the upper conveying machine; a lower conveying line located below the upper conveying line, the lower conveying line comprises a sub-conveying assembly and a main conveying assembly arranged in sequence along the feeding direction, the sub-conveying assembly has a sub-conveying surface that can swing up and down, the swing fulcrum of the sub-conveying surface is located on the sub-conveying assembly away from the main conveying assembly, the main conveying assembly has at least two main conveying surfaces arranged horizontally and spaced apart perpendicularly to the feeding direction, any two main conveying surfaces have a conveying gap therebetween, the conveying gap is provided with a lower flipping lever that can swing up and down, the swing fulcrum of the lower flipping lever is located in the conveying gap close to one side of the sub-conveying assembly.

[0006] The technical scheme has at least the following beneficial effects: the upper conveying line and the lower conveying line for conveying the mattress simultaneously are arranged on the rack, in the upper conveying line, the mattress is on the secondary conveying surface, when the mattress needs to be turned over, the upper turning lever swings upward, extends from the feeding gap to directly turn over the mattress and drop the mattress on the upper conveyor, and then the upper conveyor sends the mattress back to the secondary conveying surface; in the lower conveying line, the mattress is on the primary conveying surface, when the mattress needs to be turned over, the secondary conveying surface on the secondary conveying assembly swings downward, the secondary conveying surface is in an inclined state, the mattress is conveyed from the primary conveying surface of the primary conveying assembly to the secondary conveying assembly, the bottom side of the mattress drops on the secondary conveying surface, the lower turning lever swings upward, extends from the conveying gap and abuts against the bottom side of the mattress, and as the turning lever continues to swing upward, the mattress is gradually turned over and completely drops on the secondary conveying assembly, at this time, the secondary conveying surface works to move the mattress on the secondary conveying surface by a distance, provides a space for avoiding the mattress when the mattress is moved upward, then the secondary conveying surface swings upward to be flush with the primary conveying surface, and the mattress is sent back to the primary conveying surface by the secondary conveying surface, the turning over of the mattress is completed, the space occupied by the mattress when the mattress is turned over is reduced, the turning over is directly completed on the upper and lower conveying lines for processing the other side, the space occupied by the whole equipment is reduced, and the stability of the mattress turning over is improved due to the inclined secondary conveying surface supporting the mattress.

[0007] As a further improvement of the above technical scheme, the upper conveying line further comprises a first conveyor, the first conveyor is located on a side of the upper conveyor away from the secondary conveying assembly, and the lower conveying line further comprises a second conveyor, the second conveyor is located on a side of the primary conveying assembly away from the secondary conveying assembly. The first conveyor can place the mattress to be processed and conveyed, and the second conveyor can place the mattress after processing, so that the first conveyor and the second conveyor can be used as a work waiting area, and the mattress is conveyed again when the next operation is needed, which is beneficial to control the production rhythm and better realize automatic production.

[0008] As a further improvement of the above technical scheme, the secondary conveying assembly comprises a secondary belt conveyor connected to the rack, the secondary belt conveyor has the secondary conveying surface, and at least two secondary belt conveyors are arranged horizontally and spaced apart perpendicularly to the feeding direction. The secondary conveying surface on the secondary belt conveyor can move back and forth in the horizontal direction, the secondary conveying surfaces on the at least two secondary belt conveyors jointly support and convey the mattress, and a feeding gap is formed between adjacent two secondary belt conveyors to provide a space for accommodating and avoiding the upper turning lever.

[0009] As a further improvement of the above technical solution, the number of the upturning rods is at least two, the upturning rod comprises an upturning section and a connecting section connected with each other, the connecting section is rotationally connected to the rack, a secondary linear drive is arranged on the rack, the secondary linear drive is drivingly connected to one end of the connecting section away from the upturning section, the side of the at least two secondary belt conveyors is provided with the upturning rod, and the upturning section of at least one upturning rod is located in the feeding gap. When the mattress does not need to be turned over, the upturning section remains in the feeding gap, when the mattress needs to be turned over, the secondary linear drive pulls the connecting section to make the upturning section turn upward, when the turning is completed, the secondary linear drive pushes the connecting section to make the upturning section turn downward and enter the feeding gap, thereby avoiding affecting the secondary conveying surface to move the mattress.

[0010] As a further improvement of the above technical solution, the sub-conveying assembly comprises a swing part and a sub-belt conveyor, the sub-belt conveyor is rotationally connected to the rack, the sub-belt conveyor is provided with the sub-conveying surface, the swing part comprises a first linear drive, a carriage and a support rod, the first linear drive is connected to the rack, the first linear drive can drive the carriage to move in the direction close to or away from the main conveying assembly, one end of the support rod is rotationally connected to the carriage, the bottom side of the sub-belt conveyor is rotationally connected with a lower beam, and the other end of the support rod is connected to the lower beam. The sub-belt conveyor is provided with the sub-conveying surface for driving the mattress to move back and forth in a straight line, when the sub-conveying surface needs to be swung up and down, the first linear drive drives the carriage to move away from the main conveying assembly, the carriage drives the support rod to move away from the main conveying assembly and drives the sub-conveying surface to rotate downward around the swing pivot point, the first linear drive drives the carriage to move close to the main conveying assembly, and in the same way, the carriage drives the sub-conveying surface to rotate upward around the swing pivot point through the support rod and supports the sub-conveying surface by the support rod, so as to swing the sub-conveying surface up and down.

[0011] As a further improvement of the above technical solution, the swing part further comprises a fixed rack, a movable rack, a connecting block and a gear, the fixed rack is connected to the rack, the movable rack is connected to the slide, the first linear drive is drivingly connected to the connecting block, the first linear drive can drive the connecting block to move towards or away from the main conveying assembly, the connecting block is rotatably connected with the gear, the top side of the gear is engaged with the movable rack, and the bottom side of the gear is engaged with the fixed rack. The first linear drive is connected to the connecting block, which directly drives the connecting block to move towards or away from the main conveying assembly. Since the gear is engaged with the movable rack and the fixed rack, the gear can move on the fixed rack, and the slide is driven to move towards or away from the main conveying assembly through the movable rack. Thus, the stroke of the slide is twice the stroke of the connecting block, the stroke required by the first linear drive can be reduced, the volume occupied by the first linear drive is reduced, and the volume of the entire device is reduced.

[0012] As a further improvement of the above technical solution, the bottom side of the slide is connected with a sliding block, the rack is connected with a sliding rail, and the sliding block is connected to the sliding rail in cooperation. The cooperation of the sliding block and the sliding rail can improve the stability of the slide when sliding on the rack, and better reduce the shaking of the sub-conveying surface when swinging.

[0013] As a further improvement of the above technical solution, the main conveying assembly comprises a main belt conveyor connected to the rack, the main belt conveyor has the main conveying surface, the main belt conveyor is arranged in at least two horizontally and vertically to the feeding direction, one end of the down-turning rod is rotatably connected to the rack, the rack is connected with a second linear drive, and the movable end of the second linear drive is rotatably connected to the down-turning rod. The main belt conveyor has a main conveying surface that can move back and forth in a horizontal straight line direction, at least two main conveying surfaces simultaneously support and move the mattress, and the main conveying surfaces of adjacent two main belt conveyors form a conveying gap to provide accommodation and movement avoidance space for the down-turning rod. The movable end of the second linear drive can generate a driving force for reciprocating movement in a straight line direction to drive the down-turning rod to rotate around the swing pivot connected to the rack.

[0014] As a further improvement of the above technical solution, the blocking frame is arranged on the side of the upper conveyor and the sub-conveying assembly, and a roller is rotatably connected to the blocking frame, the rotation axis of the roller extends in the upward and downward direction, and a plurality of rollers are connected to the blocking frame in the feeding direction. When the mattress is turned on the sub-conveying surface and the main conveying surface, it can be abutted on the blocking frame to prevent the mattress from moving out, and during the mattress edge turning process, the mattress translates on the sub-conveying surface and the main conveying surface, and the side edges of the mattress can abut against the rollers, improving the stability of the mattress during movement and preventing deviation.

[0015] A double-layer edge turning machine includes a sewing mechanism, a corner turning mechanism, and the double-layer conveying line described above. The sewing mechanism and the corner turning mechanism are arranged on the side of the sub-conveying assembly and the main conveying assembly of the machine frame.

[0016] The technical solution has at least the following beneficial effects: the sub-conveying assembly in the upper conveying line and the main conveying assembly in the lower conveying line can be used as a work station for mattress edge turning, the side edges of the mattress are sewn by the sewing mechanism on the sub-conveying surface and the main conveying surface, and after sewing one side edge of the mattress, the mattress is rotated by the corner turning mechanism, and the other side edge of the mattress is continuously sewn, until the four side edges are sewn. This can realize simultaneous edge turning of the mattress on the upper and lower layers, greatly improving the production efficiency, and directly completing double-sided edge turning of the mattress on the sub-conveying surface and the main conveying surface, using a set of edge turning processing structure, the whole device is smaller in size and lower in cost. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly describe the drawings needed in the embodiment description. Obviously, the described drawings are only part of the embodiments of the present application, not all embodiments, and those skilled in the art can obtain other design schemes and drawings from these drawings without creative labor.

[0018] Figure 1 is a perspective view of the double-layer conveying line of the present application without the first conveyor;

[0019] Figure 2 is a perspective view of the sub-conveying assembly of the present application;

[0020] Figure 3 is a perspective view of the lower conveying line of the present application without the need for turning;

[0021] Figure 4 is a perspective view of the lower conveying line of the present application during the turning action;

[0022] Figure 5 is a perspective view of the oscillating part of the present application;

[0023] Figure 6 is a perspective view of a double-wall edge machine according to the present application.

[0024] In the drawings: 100 - upper conveyor, 200 - secondary conveying assembly, 210 - secondary belt conveyor, 211 - secondary conveying surface, 221 - upper turning section, 222 - connecting section, 230 - secondary linear drive, 300 - sub-conveying assembly, 310 - sub-belt conveyor, 320 - sub-conveying surface, 330 - oscillating section, 331 - first linear drive, 332 - carriage, 333 - support rod, 334 - fixed rack, 335 - movable rack, 336 - connecting block, 337 - gear wheel, 340 - lower beam, 400 - main conveying assembly, 410 - main belt conveyor, 420 - main conveying surface, 431 - lower turning rod, 432 - second linear drive, 500 - second conveyor, 610 - blocking frame, 620 - roller, 710 - sewing mechanism, 720 - corner turning mechanism, 800 - machine frame. DETAILED DESCRIPTION

[0025] Embodiments of the present application are described below in detail with reference to the accompanying drawings, in which like or similar elements are denoted by the same or similar reference signs, and examples of the embodiments are shown in the drawings. The embodiments described below by reference to the drawings are exemplary only, and are for the purpose of explaining the present application, and should not be understood as limiting the present application.

[0026] In the description of the present application, if the orientation description, such as up, down, front, back, left, right, etc. is involved, the orientation or positional relationship shown in the drawings is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be understood as limiting the present application.

[0027] In the description of the present application, the meaning of several is one or more, and the meaning of multiple is two or more. Greater than, less than, more than, etc. are understood as not including the number itself, and above, below, etc. are understood as including the number itself. If it is described as first, second, etc., it is only for the purpose of distinguishing technical features, and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of technical features indicated.

[0028] In the description of the present application, unless otherwise explicitly limited, the words such as setting, mounting, connecting, etc. should be broadly understood, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0029] Reference Figure 1The double-layer conveying line comprises a frame 800, and an upper conveying line and a lower conveying line arranged on the frame 800 and capable of conveying a mattress.

[0030] The upper conveying line comprises an upper conveyor 100 and a secondary conveying assembly 200 arranged side by side, the upper conveyor 100 is provided with an upper conveying surface, the upper conveying surface is capable of moving the mattress to either side in a straight direction, the secondary conveying assembly 200 is provided with two secondary conveying surfaces 211 arranged horizontally and spaced apart perpendicularly to the feeding direction, and a feeding gap is formed between the two secondary conveying surfaces 211, the feeding gap is provided with an upper turnover rod capable of swinging up and down, and a swinging fulcrum of the upper turnover rod is located on one side of the feeding gap close to the upper conveyor 100, the upper turnover rod can swing up to be close to the upper conveyor 100 and extend out of the feeding gap, or swing down to be withdrawn into the feeding gap without affecting the normal conveying of the mattress on the secondary conveying surface 211.

[0031] The lower conveying line is located below the upper conveying line, and the lower conveying line comprises a sub-conveying assembly 300 and a main conveying assembly 400 arranged in sequence along the feeding direction, the main conveying assembly 400 is provided with at least two main conveying surfaces 420 arranged horizontally and spaced apart, a conveying gap is formed between any two main conveying surfaces 420, the mattress can be placed on all the main conveying surfaces 420, and all the main conveying surfaces 420 jointly support the mattress, the main conveying assembly 400 is capable of moving the mattress to either side in a straight direction, and the sub-conveying assembly 300 is located on either side of the main conveying assembly 400 in the straight direction, the sub-conveying assembly 300 is provided with a sub-conveying surface 320 capable of swinging up and down, a swinging fulcrum of the sub-conveying surface 320 is located on one side of the sub-conveying assembly 300 away from the main conveying assembly 400, and a turnover assembly is provided with a turnover rod capable of swinging up and down, a swinging fulcrum of the turnover rod is located on one side of the conveying gap close to the sub-conveying assembly 300, the turnover rod can swing up to be close to the sub-conveying assembly 300 and extend out of the conveying gap, or swing down to be withdrawn into the conveying gap without affecting the normal conveying of the mattress on the main conveying surface 420.

[0032] From the above, the upper conveying line and the lower conveying line capable of conveying the mattress simultaneously are arranged on the rack 800. In the upper conveying line, the mattress is on the secondary conveying surface 211. When the mattress needs to be turned over, the upper turning lever swings upward, extends from the feeding gap to directly turn over the mattress, and falls on the upper conveyor 100. Then the upper conveyor 100 sends the mattress back to the secondary conveying surface 211. In the lower conveying line, the mattress is on the main conveying surface 420. When the mattress needs to be turned over, the secondary conveying surface 320 on the secondary conveying assembly 300 swings downward. The entire secondary conveying surface 320 is in an inclined state. The mattress is conveyed from the main conveying surface 420 of the main conveying assembly 400 to the secondary conveying assembly 300. The bottom side of the mattress falls on the secondary conveying surface 320. The lower turning lever 431 swings upward, extends from the conveying gap, and abuts against the bottom side of the mattress. As the turning lever continues to swing upward, the mattress is gradually turned over and completely falls on the secondary conveying assembly 300. At this time, the secondary conveying surface 320 works to move the mattress upward by a distance first, provides a space for avoiding the mattress when it moves upward, then swings the secondary conveying surface 320 upward to be flush with the main conveying surface 420, and then sends the mattress back to the main conveying surface 420 by the secondary conveying surface 320, thereby completing the turning over of the mattress. In this way, the space required for turning over the mattress can be reduced. The turning over can be directly completed on the upper and lower conveying lines to process the other side. This is beneficial to reduce the space required by the entire device. In the turning over process, the stability of the mattress turning over is improved due to the inclined secondary conveying surface 320 supporting the mattress.

[0033] In actual application, the devices of the peripherals are usually connected to the upper conveying line and the lower conveying line, so as to further expand the whole device and improve automation. In the embodiment, the upper conveying line further comprises a first conveyor. The first conveyor is located on the side of the upper conveyor 100 away from the secondary conveying assembly 200. The lower conveying line further comprises a second conveyor 500. The second conveyor 500 is located on the side of the main conveying assembly 400 away from the secondary conveying assembly 300. The mattress to be processed can be placed on the first conveyor. The mattress processed can be placed on the second conveyor 500. In this way, the first conveyor and the second conveyor 500 can be used as a work waiting area. When the next operation of the mattress needs to be performed, the mattress is moved. This is beneficial to control the production rhythm and better realize automatic production.

[0034] In the upper conveyor 100 and the secondary conveying assembly 200, there is a conveying surface that can move back and forth in a straight line, namely the upper conveying surface and the secondary conveying surface 211. The structural form can be various, such as a roller type, a belt type, or a chain type conveyor. Figure 2As shown, in some embodiments, the secondary conveying assembly 200 comprises a secondary belt conveyor 210 connected to the frame 800, the secondary belt conveyor 210 has the secondary conveying surface 211, and the secondary belt conveyor 210 is horizontally spaced apart in a direction perpendicular to the feeding direction. The secondary conveying surface 211 on the secondary belt conveyor 210 can move reciprocally in the horizontal direction, and the secondary conveying surfaces 211 on at least two secondary belt conveyors 210 collectively support and move the mattress, and the feeding gap is formed between the adjacent two secondary belt conveyors 210 to provide space for accommodating and avoiding the turnover rod.

[0035] Since the turnover rod is needed to directly drive the mattress to rotate from the horizontal state to the vertical state, in order to improve the stability of the mattress turnover, the number of the turnover rod is two, the turnover rod comprises a turnover section 221 and a connecting section 222 connected to each other, an included angle can be arranged between the turnover section 221 and the connecting section 222 to improve the installation height of the secondary linear driving member 230 and reduce the space occupation, the connecting section 222 is rotationally connected to the frame 800, the position of the connecting section 222 connected to the frame 800 is relatively close to one side of the turnover section 221, the secondary linear driving member 230 is arranged on the frame 800, the secondary linear driving member 230 is drivingly connected to one end of the connecting section 222 away from the turnover section 221, and the side edges of the two secondary belt conveyors 210 are provided with the turnover rod. In actual application, the turnover sections 221 of the two turnover rods are arranged in the feeding gap, and in order to make the turnover rod apply force to the mattress more uniformly, the turnover section 221 of one of the turnover rods can be arranged in the feeding gap, and the turnover section 221 of the other turnover rod is arranged on the side of the secondary belt conveyor away from the feeding gap.

[0036] In actual application, the upper conveyor 100 can adopt a belt conveyor, and similarly, the belt conveyor can be arranged in two in the horizontal direction, and two upper conveyors 100 are formed in the two upper conveyors 100 to collectively support and move the mattress. By arranging a plurality of upper conveyors 100, stable moving force can be provided in the large-area conveying surface to make the mattress move more stably and enhance the overall structural stability.

[0037] In the secondary turnover assembly, when the mattress is not needed to be turned over, the turnover section 221 remains in the feeding gap, when the mattress is needed to be turned over, the secondary linear driving member 230 pulls the connecting section 222 to make the turnover section 221 turn over upward, when the turnover is completed, the secondary linear driving member 230 pushes the connecting section 222 to make the turnover section 221 turn over downward and enter the feeding gap to avoid affecting the movement of the mattress by the secondary conveying surface 211.

[0038] The sub conveying assembly 300 mainly has a sub conveying surface 320 which can swing up and down. The sub conveying surface 320 can be a roller type, a belt type or a chain type conveying surface which can move back and forth. When it is needed to swing the conveying machine up and down, a driving motor, a rotary cylinder or the like can be directly connected to one side of the conveying machine to drive the whole conveying machine to swing. In order to ensure the stability of the sub conveying surface 320 when it is bearing and moving, as shown in Figure 3 As shown in Figure 4 In the embodiment, the sub conveying assembly 300 comprises a swing part 330 and a sub belt type conveying machine 310. The sub belt type conveying machine 310 is rotationally connected to the frame 800. The sub belt type conveying machine 310 has the sub conveying surface 320. The swing part 330 comprises a first linear driving member 331, a sliding frame 332 and a supporting rod 333. The first linear driving member 331 is connected to the frame 800. The first linear driving member 331 can drive the sliding frame 332 to move towards or away from the main conveying assembly 400. One end of the supporting rod 333 is rotationally connected to the sliding frame 332. The bottom side of the sub belt type conveying machine 310 is rotationally connected with a lower beam 340. The other end of the supporting rod 333 is connected to the lower beam 340.

[0039] In the specific embodiment of the sub conveying assembly 300, the sub belt type conveying machine 310 has the sub conveying surface 320 which can provide a straight line reciprocating conveying drive for the mattress. When it is needed to swing the sub conveying surface 320 up and down, the first linear driving member 331 drives the sliding frame 332 to move away from the main conveying assembly 400. The sliding frame 332 drives the supporting rod 333 to move away from the main conveying assembly 400 and drives the sub conveying surface 320 to rotate downward around the swing pivot. The first linear driving member 331 drives the sliding frame 332 to move close to the main conveying assembly 400. In the same way, the sliding frame 332 drives the sub conveying surface 320 to rotate upward around the swing pivot through the supporting rod 333 and supports the sub conveying surface 320 by the supporting rod 333. In this way, the sub conveying surface 320 can swing up and down.

[0040] The first linear driving member 331 can be directly connected to the sliding frame 332. The sliding frame 332 is driven to move back and forth to rotate and swing the supporting rod 333. In actual application, if it is needed to tilt the sub conveying surface 320 by a large angle, the driving stroke of the first linear driving member 331 is required to be higher. The length of the first linear driving member 331 is lengthened to occupy space. In order to better save space, as shown in Figure 5As shown, in the embodiment, the swing part 330 further comprises a fixed rack 334, a movable rack 335, a connecting block 336 and a gear 337, the fixed rack 334 is connected to the frame 800, the movable rack 335 is connected to the sliding frame 332, the first linear driving member 331 is drivingly connected to the connecting block 336, the first linear driving member 331 can drive the connecting block 336 to move towards or away from the main conveying assembly 400, the gear 337 is rotatably connected to the connecting block 336, the top side of the gear 337 is in mesh with the movable rack 335, and the bottom side of the gear 337 is in mesh with the fixed rack 334.

[0041] The first linear driving member 331 is connected to the connecting block 336 to directly drive the connecting block 336 to move towards or away from the main conveying assembly 400, since the gear 337 is in mesh with the movable rack 335 and the fixed rack 334, the gear 337 can move on the fixed rack 334 and drive the sliding frame 332 to move towards or away from the main conveying assembly 400 through the movable rack 335, so that the moving stroke of the sliding frame 332 is twice the moving stroke of the connecting block 336, the stroke required for driving the first linear driving member 331 is reduced, the volume occupied by the first linear driving member 331 is reduced, and the volume of the whole device is reduced.

[0042] When the number of the swing part 330 is one, in order to improve the stability of the sub conveying surface 320 during operation, auxiliary rods can be directly added on both sides of the sub belt conveyor 310, both ends of the auxiliary rods are rotatably connected to the sub belt conveyor 310 and the frame 800, and the bottom end of the auxiliary rod can also slide on the frame 800, and in order to better improve the stability of the sub conveying surface 320 during swinging and the weight that can be carried during bearing, in the embodiment, the number of the swing part 330 is two, and a connecting rod is connected between the connecting blocks 336 in any two adjacent swing parts 330. The two swing parts 330 provide swing driving force for the swinging of the sub conveying surface 320, improve the stability of the swing driving and supporting of the sub conveying surface 320, and the connecting rod is connected between the connecting blocks 336 of the adjacent two swing parts 330, which can keep the movement of the two swing parts 330 synchronous.

[0043] In the above embodiment, the first linear driving member 331 directly drives the sliding frame 332 to move, and the sliding frame 332 can slide linearly on the frame 800, and in order to further improve the stability of the movement of the sliding frame 332 and reduce the friction during the movement of the sliding frame 332, in the embodiment, a sliding block is connected to the bottom side of the sliding frame 332, a sliding rail is connected to the frame 800, and the sliding block is connected to the sliding rail in cooperation. The cooperation of the sliding block and the sliding rail can improve the stability of the sliding frame 332 when sliding on the frame 800, and better reduce the shaking of the sub conveying surface 320 during swinging.

[0044] The main conveying assembly 400 has a main conveying surface 420 that can move reciprocally along a straight line. The main conveying surface 420 can have various structural forms, and can be formed by a roller type, belt type or chain type conveyor. In some embodiments, the main conveying assembly 400 includes a main belt conveyor 410 connected to the frame 800, and the main belt conveyor 410 has the main conveying surface 420. The main belt conveyor 410 is arranged horizontally and spaced apart vertically along the feeding direction. One end of the lower turnover rod 431 is rotatably connected to the frame 800, and the frame 800 is connected to a second linear drive 432, and the movable end of the second linear drive 432 is rotatably connected to the lower turnover rod 431. The main belt conveyor 410 has a main conveying surface 420 that can move reciprocally along a horizontal straight line. The three main conveying surfaces 420 simultaneously support and convey the mattress, and the conveying gap is formed between the main conveying surfaces 420 of the adjacent two main belt conveyors 410 to provide space for the lower turnover rod 431 to move and avoid. The turnover rod can be driven to rotate by a motor or a rotary cylinder. In order to improve the activity and load capacity of the turnover rod, the second linear drive 432 is arranged on the frame 800 in this embodiment. The movable end of the second linear drive 432 can generate a driving force that moves reciprocally along a straight line to drive the lower turnover rod 431 to rotate around the swing pivot connected to the frame 800.

[0045] When the mattress is processed by the edge, one side of the mattress is usually close to the side edge position of the upper conveying surface and the sub-conveying surface 320. In order to better limit the mattress and prevent it from falling, the frame 800 is provided with a blocking frame 610 at the side edge position of the upper conveyor 100 and the sub-conveying assembly 300. A roller 620 is rotatably connected to the blocking frame 610, and the rotation axis of the roller 620 extends in the vertical direction. A plurality of rollers 620 are connected to the blocking frame 610 along the feeding direction. When the mattress is turned on the sub-conveying surface 211 and the main conveying surface 420, it can abut against the blocking frame 610 to prevent it from moving out. During the edge processing of the mattress, the mattress translates on the sub-conveying surface 211 and the main conveying surface 420, and the side edge of the mattress can abut against the roller 620 to improve the stability of the mattress during movement and prevent it from deviating.

[0046] In actual application, the sub-linear drive 230, the first linear drive 331 and the second linear drive 432 are driving structures for providing reciprocating movement along a straight line, and any one of a pneumatic push rod, an electric push rod or a hydraulic push rod can be selected.

[0047] In order to facilitate the use of the upper conveying line, platforms are arranged on the rack 800 at positions corresponding to the two sides of the secondary conveying surface 211, and escalators are connected to the platforms, so that workers can reach the platforms from the escalators to perform production operations and maintenance.

[0048] As shown in Figure 6 A double-layer edging machine, which comprises a sewing mechanism 710, a corner turning mechanism and the double-layer conveying line described above, the sewing mechanism 710 comprises a sewing head, which is suitable for edging processing of a mattress, Figure 6 The sewing mechanism 710 is not shown on the lower conveying line, and the corner turning mechanism has a clamping arm, which can approach and compress the mattress on the secondary conveying surface 211 or the primary conveying surface 420, and then drive the mattress to rotate, so as to change the side of the mattress for edging processing. The rack 800 is provided with the sewing mechanism 710 and the corner turning mechanism 720 at the side positions of the secondary conveying assembly 200 and the primary conveying assembly 400.

[0049] The double-layer conveying line can be used to convey the mattress, and independent edging processing structures are arranged on the sides of the double-layer conveying line to realize double-layer processing. The secondary conveying assembly 200 in the upper conveying line and the primary conveying assembly 400 in the lower conveying line can be used as workstations for edging processing of the mattress. The side edges of the mattress are sewn by the sewing mechanism 710 on the secondary conveying surface 211 and the primary conveying surface 420. After the sewing of one side edge of the mattress is completed, the mattress is rotated by the corner turning mechanism, and the sewing of the other side edge of the mattress is continued, until the sewing of the four side edges is completed. In this way, the upper and lower layers can simultaneously perform edging processing of the mattress, which greatly improves the production efficiency, and directly completes the double-sided edging of the mattress on the secondary conveying surface 211 and the primary conveying surface 420, so that a set of edging processing structure can be used, and the entire device has a smaller size and lower cost.

[0050] The preferred embodiments of the present application are described in detail above, but the present application is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present application, and these equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. A double-layered conveyor line, characterized by: The machine frame (800) is provided with: The upper conveying line comprises the upper conveying machine (100) and the secondary conveying assembly (200) arranged side by side, the direction from the secondary conveying assembly (200) to the upper conveying machine (100) is a feeding direction, the secondary conveying assembly (200) has at least two secondary conveying surfaces (211) arranged horizontally and spaced apart perpendicularly to the feeding direction, any two secondary conveying surfaces (211) have a feeding gap therebetween, and an upper turnover rod capable of swinging up and down is arranged in the feeding gap, and a swinging fulcrum of the upper turnover rod is located in the feeding gap and close to one side of the upper conveying machine (100). The lower conveying line is located below the upper conveying line, and comprises a sub-conveying assembly (300) and a main conveying assembly (400) arranged in sequence along the feeding direction. The sub-conveying assembly (300) has a sub-conveying surface (320) capable of swinging up and down, and the swinging fulcrum of the sub-conveying surface (320) is located on the side of the sub-conveying assembly (300) away from the main conveying assembly (400). The main conveying assembly (400) has at least two main conveying surfaces (420) arranged horizontally and spaced apart along a direction perpendicular to the feeding direction. Any two main conveying surfaces (420) have a conveying gap therebetween, and the conveying gap is provided with a lower turnover rod (431) capable of swinging up and down. The swinging fulcrum of the lower turnover rod (431) is located on the side of the conveying gap close to the sub-conveying assembly (300). The sub-conveying assembly (300) comprises a swinging part (330) and a sub-belt conveyor (310). The sub-belt conveyor (310) is rotationally connected to the rack (800), and has the sub-conveying surface (320) thereon. The swinging part (330) comprises a first linear drive (331), a sliding frame (332) and a support rod (333). The first linear drive (331) is connected to the rack (800), and can drive the sliding frame (332) to move along a direction close to or away from the main conveying assembly (400). One end of the support rod (333) is rotationally connected to the sliding frame (332), and the bottom side of the sub-belt conveyor (310) is rotationally connected with a lower beam (340). The other end of the support rod (333) is connected to the lower beam (340). The swinging part (330) further comprises a fixed rack (334), a movable rack (335), a connecting block (336) and a gear (337). The fixed rack (334) is connected to the rack (800), and the movable rack (335) is connected to the sliding frame (332). The first linear drive (331) is drivingly connected to the connecting block (336), and can drive the connecting block (336) to move along a direction close to or away from the main conveying assembly (400). The connecting block (336) is rotationally connected with the gear (337), the top side of the gear (337) is engaged with the movable rack (335), and the bottom side of the gear (337) is engaged with the fixed rack (334). The bottom side of the sliding frame (332) is connected with a sliding block, and the rack (800) is connected with a sliding rail. The sliding block is connected to the sliding rail in a matched manner.

2. The dual conveyor line of claim 1, wherein: The upper conveying line further comprises a first conveyor located on the side of the upper conveyor (100) away from the secondary conveying assembly (200), and the lower conveying line further comprises a second conveyor (500) located on the side of the main conveying assembly (400) away from the sub-conveying assembly (300).

3. The dual conveyor line of claim 1, wherein: The secondary conveying assembly (200) comprises a secondary belt conveyor (210) connected to the frame (800), and the secondary belt conveyor (210) has the secondary conveying surface (211) thereon, and the secondary belt conveyor (210) is horizontally spaced apart along a direction perpendicular to the feeding direction.

4. A dual conveyor line according to claim 3, wherein: The number of the upper turning rods is at least two, and the upper turning rod comprises an upper turning section (221) and a connecting section (222) connected to each other, the connecting section (222) is rotationally connected to the frame (800), the frame (800) is provided with a secondary linear drive (230), the secondary linear drive (230) is drivingly connected to the end of the connecting section (222) away from the upper turning section (221), the side of at least two of the secondary belt conveyors (210) is provided with the upper turning rod, and the upper turning section (221) of at least one of the upper turning rods is located in the feeding gap.

5. The dual conveyor line of claim 1, wherein: The main conveying assembly (400) comprises a main belt conveyor (410) connected to the frame (800), and the main belt conveyor (410) has the main conveying surface (420) thereon, and the main belt conveyor (410) is horizontally spaced apart along a direction perpendicular to the feeding direction, and one end of the lower turning rod (431) is rotationally connected to the frame (800), and the frame (800) is connected with a second linear drive (432), and the movable end of the second linear drive (432) is rotationally connected to the lower turning rod (431).

6. The dual conveyor line of claim 1, wherein: The frame (800) is provided with a blocking frame (610) at the side of the upper conveyor (100) and the sub-conveying assembly (300), the blocking frame (610) is rotationally connected with a roller (620), the rotation axis of the roller (620) extends in the up-down direction, and the roller (620) is connected with a plurality of rollers in the feeding direction on the blocking frame (610).

7. A double flanging machine characterized by: The machine frame (800) is provided with the sewing mechanism (710) and the corner turning mechanism (720) at the side of the secondary conveying assembly (200) and the main conveying assembly (400), and the machine further comprises a sewing mechanism (710) and a corner turning mechanism.

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