Six-row-chain pre-pushing stack conveying mechanism

Abstract

The invention discloses a six-row-chain pre-pushing stack conveying mechanism, relates to the technical field of food production lines, and solves the problems that in the prior art, when a nine-leg plastic pallet is conveyed and translated, the conveying is easy to slip, pallet supporting legs are easy to deform, the translation is not smooth and the like. Comprising a pair of guardrail frames which are symmetrically distributed; the pallet jacking assembly is used for jacking out a pallet; the straight plate chain transmission mechanism is used for conveying pallets; the straight plate chain transmission mechanism comprises three cushion rails which are sequentially distributed in parallel, and a pair of fixing plates are fixedly installed between the cushion rail located in the middle and the cushion rails on the two sides. According to the scheme design, the bottom face of the nine-foot pallet can make full contact with the chain, the bearing contact face is large, and transportation is stable; empty pallets are not easy to slip, and full pallets can be prevented from being deformed; the guardrail is convenient to adjust and can adapt to replacement of nine-leg pallets of different sizes; the air cylinder stretches out to enable the pushing plate to jack the pallet to a proper position, direct pushing of the pallet pushing mechanism is facilitated, and it is guaranteed that the pallet is conveyed smoothly and rapidly.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of food production lines, and particularly relates to a six-row chain pre-push stack conveying mechanism. BACKGROUND

[0002] The stack conveying mechanism plays a key role in the automatic production line of the food and beverage industries, and is mainly responsible for accurately conveying the stack to a specific position on the production line. Due to the different product production processes and storage movement requirements, the stack styles are diverse, and stacks of different materials and structures have different requirements for the conveying mechanism, making it difficult to adopt a unified conveying solution. Among them, the drum conveying is the most widely used stack conveying method, which can meet the conveying needs of most types of stacks. Nine-leg plastic stacks are applied in more and more occasions due to their advantages of simple manufacturing, small stacking space, light weight, etc.

[0003] At present, the existing six-row chain pre-push stack conveying mechanism has many problems when dealing with nine-leg plastic stacks.

[0004] On the one hand, the nine-leg plastic stack is relatively light, and the contact surface with the drum conveying is small, which is easy to slip when conveying in the empty stack state, and further leads to conveying misoperation; in the full stack state, the stack leg is severely deformed due to the large weight and small contact surface.

[0005] On the other hand, affected by the diversity of production line layout, the equipment conveying layout is different, and in some layout space and work process limited conditions, the stack conveying mechanism cannot directly convey the stack to the specified position in the specified direction, and needs to use a stack translation mechanism to translate the stack from the conveying line to one side. The common translation structure is to add several groups of chain lifting structures in the gap of the drum conveying, and the stack is lifted and horizontally moved by the chain conveying. However, due to the special structure of the nine-leg stack, the old drum conveying combined with the chain lifting structure cannot realize the smooth and convenient movement of the nine-leg stack.

[0006] In summary, the existing technology has problems such as easy slipping of conveying, deformation of stack leg, and poor translation when dealing with nine-leg plastic stack conveying and translation. SUMMARY

[0007] The present application provides a six-row chain pre-push stack conveying mechanism, which can solve the problems of easy slipping of conveying, deformation of stack leg, and poor translation when the existing technology deals with nine-leg plastic stack conveying and translation.

[0008] To achieve the above-mentioned purpose, according to the first aspect of the embodiment of the present application, a six-row chain pre-push stack conveying mechanism is provided, which comprises a pair of guardrail frames symmetrically distributed; Further comprising: a stack lifting assembly for ejecting the stack; A straight plate chain transmission mechanism for conveying the stack; The straight plate chain transmission mechanism comprises three cushion rails which are arranged in parallel in sequence, a pair of fixed plates are fixedly installed between the middle cushion rail and the two side cushion rails, and the fixed plates are connected as a whole through the fixed plates, two staggered guide wheels are rotatably arranged at both ends of each cushion rail through bearings; A guard plate is fixedly connected to both sides of the middle end of the bottom surface of each cushion rail, six rows of chain wheels are rotatably arranged in the guard plate through bearings, the guide wheels and the six rows of chain wheels are connected through chains, each of the six rows of chain wheels is synchronously connected through a transmission shaft, and the transmission shaft passes through each guard plate; A tensioning assembly is arranged on one side of each cushion rail, and the tensioning assembly is used for tensioning the chains.

[0009] Further improvement lies in that the straight plate chain transmission mechanism further comprises a speed reducer which is fixedly connected to the bottom surface of the guard rail frame, and the output end of the speed reducer is connected with the transmission shaft.

[0010] Further improvement lies in that the tensioning assembly comprises a tensioning block which is connected to the bottom surface of each cushion rail through a fixed bolt, a tensioning fork which is fixedly connected to each tensioning block, and a tensioning wheel which is symmetrically arranged in each pair of guard plates and is in contact with the chain, and the tensioning fork is connected with the tensioning wheel on one side.

[0011] Further improvement lies in that an adjusting groove is formed in each guard plate at the position of the tensioning wheel, and the shafts on both sides of each tensioning wheel extend from the adjusting groove and are rotatably arranged on the tensioning fork.

[0012] Further improvement lies in that the tensioning wheel on one side of the six rows of chain wheels is fixed, and the tensioning wheel connected with the tensioning fork on the other side is adjustable, so that the chain is tensioned.

[0013] Further improvement lies in that the pallet jacking assembly comprises a jacking cylinder which is fixedly connected to the bottom surface of each fixed plate, a limiting cylinder which is symmetrically embedded on both sides of each fixed plate, a supporting column which is movably inserted into each limiting cylinder, and a pushing plate which is fixedly connected to the top surface of each two supporting columns.

[0014] Further improvement lies in that a supporting plate is fixedly installed between the inner sides of adjacent cushion rails, and the supporting plate is fixedly installed with a limiting guide plate which is used for pallet positioning and guiding.

[0015] Further improvement lies in that the guide wheels located at the outer sides of both ends of each cushion rail are higher than the adjacent guide wheels, and the six rows of chain wheels are lower than the guide wheels located on both sides.

[0016] Compared with the prior art, the beneficial effects of the present application are: The application adopts the structure of three-column six-row straight plate chain conveying matched with four groups of cylinder push plate lifting mechanisms to realize the conveying of nine-leg pallets and realize the pre-pushing pallet function. The scheme can make the bottom surface of the nine-leg pallet fully contact with the chain, has large bearing contact surface and stable transportation; the empty pallet is not easy to slip and the deformation of the full pallet can be avoided; the guardrail adjustment is convenient and can adapt to the replacement of different sizes of nine-leg pallets; the cylinder extension makes the push plate lift the pallet to the appropriate position, which is convenient for the straight pushing of the push pallet mechanism and ensures the smooth and fast conveying of the pallet. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the overall structure schematic diagram of the application; Figure 2 is the top view structure schematic diagram of the application; Figure 3 is the main view structure schematic diagram of the application; Figure 4 is the left view structure schematic diagram of the application; Figure 5 is the A-A section structure schematic diagram of the application.

[0018] Markings in the figure: 1, straight plate chain transmission mechanism; 11, speed reduction motor; 12, guard plate; 13, fixed plate; 14, chain; 15, pad rail; 16, guide wheel; 17, six-row sprocket; 18, transmission shaft; 19, tensioning assembly; 191, tensioning block; 192, tensioning fork; 193, tensioning wheel; 101, adjusting groove; 2, guardrail frame; 21, limiting guide plate; 22, support plate; 3, pallet lifting assembly; 31, push plate; 32, lifting cylinder; 33, limiting cylinder; 34, support column. DETAILED DESCRIPTION

[0019] The specific embodiments of the application are described in detail below, but it should be understood that the protection scope of the application is not limited by the specific embodiments.

[0020] As Figures 1 to 5 shown, a six-row chain pre-pushing pallet conveying mechanism, comprising a pair of guardrail frames 2 distributed symmetrically; The straight-plate chain drive mechanism 1 includes three parallel pads 15 arranged in sequence. A pair of fixed plates 13 are fixedly installed between the middle pad 15 and the two side pads 15 and are connected as a whole through the fixed plates 13. Each pad 15 has two staggered guide wheels 16 rotatably arranged at both ends through bearings. Each pad 15 has a guard plate 12 fixedly connected to both sides of the bottom center. Six rows of sprockets 17 are rotatably arranged in the guard plate 12 through bearings. The guide wheels 16 and the six rows of sprockets 17 are connected by a chain 14. Each of the six rows of sprockets 17 is synchronously connected by a drive shaft 18. The drive shaft 18 passes through each guard plate 12. A reduction motor 11 is fixedly connected to the bottom surface of the guardrail frame 2. The output end of the reduction motor 11 is connected to the drive shaft 18. Each rail 15 is provided with a tensioning assembly 19 on one side of the six rows of sprockets 17 for tensioning the chain 14. It should be noted that the guide wheels 16 at both ends of each inner rail 15 are higher than the adjacent guide wheels 16, and the six rows of sprockets 17 are lower than the guide wheels 16 on both sides, so that the bottom surface of the nine-legged pallet can fully contact the chain 14. Specifically, the tensioning assembly 19 includes a tensioning block 191 connected to the bottom surface of each rail 15 by fixing bolts, a tensioning fork 192 fixedly connected to each tensioning block 191, and tensioning wheels 193 symmetrically arranged in each pair of guard plates 12 and in contact with the chain 14. Each guard plate 12 has an adjustment groove 101 at the position of the tensioning wheel 193. The adjustment groove 101 is elongated. The two side shafts of each tensioning wheel 193 extend from the adjustment groove 101 and are rotatably mounted on the tensioning fork 192. It should be noted that the tension wheel 193 located on one side of the six-row sprocket 17 is fixed, while the tension wheel 193 connected to the tension fork 192 on the other side is adjustable. By adjusting the position of the tension wheel 193, the tension of the tension wheel 193 on the chain 14 can be adjusted as needed. The pallet lifting assembly 3 is used to eject the pallet. The pallet lifting assembly 3 includes a lifting cylinder 32 fixedly connected to the bottom surface of each fixed plate 13, limiting cylinders 33 symmetrically embedded on both sides of each fixed plate 13, support columns 34 movably inserted within each limiting cylinder 33, and a push plate 31 fixedly connected to the top surface of every two support columns 34. When the pallet lifting assembly 3 is activated, the lifting cylinder 32 extends, and the support columns 34 on both sides are limited within the limiting cylinders 33, lifting the nine-legged pallet. The push plate 31 lifts the pallet to a designated position, awaiting the pusher mechanism to push the pallet to the next production line workstation.

[0021] In this embodiment, there is also a preferred implementation scheme in which a support plate 22 is fixedly installed between the inner sides of adjacent rails 15, and a limit guide plate 21 is fixedly installed on the support plate 22 for limiting and guiding the pallet.

[0022] In this embodiment, it should also be noted that the actual dimensions of each component in the application document are selected and installed according to the actual needs on site. Additionally, it should be noted that this application document only addresses the shortcomings of existing technologies in conveying and translating nine-legged plastic pallets, such as slippage during transport, deformation of the pallet legs, and poor translatability. It does not address other aspects. The improvement is achieved by designing a structure that combines a three-row, six-section straight-plate chain conveyor with a four-set cylinder-driven lifting mechanism to solve the problems of the prior art.

[0023] To facilitate understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution will now be briefly explained in conjunction with specific application scenarios: The specific usage process of the six-row chain pre-push stack conveying mechanism of the present invention is as follows: The nine-legged pallet is placed on the straight-plate chain drive mechanism 1, at which point the bottom surface of the pallet is completely in contact with the chain 14. Then, the reduction motor 11 is started, driving the drive shaft 18 to rotate, which in turn drives the six rows of sprockets 17, guide wheels 16, and chain 14, causing the nine-legged pallet to be conveyed along with the chain 14. When the side of the nine-legged pallet contacts the side of the limiting guide plate 21, it will reach the designated position, such as... Figure 2 As shown.

[0024] Subsequently, the pallet lifting assembly 3 is activated, the lifting cylinder 32 extends, and the side support columns 34 are limited within the limiting cylinder 33, lifting the nine-legged pallet. The push plate 31 lifts the pallet to the designated position, awaiting the push mechanism to move the pallet to the next production line workstation from the pushing direction, such as... Figure 3 and Figure 4 As shown.

[0025] This invention employs a structure combining a three-row, six-section straight-plate chain conveyor with a four-set cylinder-driven pusher lifting mechanism to transport nine-legged pallets, achieving a pre-push function. This solution offers several advantages: the bottom surface of the nine-legged pallet can fully contact the chain 14, providing a large bearing contact area and ensuring stable transport; empty pallets are less prone to slippage, preventing deformation of full pallets; the guardrails are easily adjustable, accommodating different sizes of nine-legged pallets; the extended cylinders allow the pusher to lift the pallet to the appropriate position, facilitating direct pushing by the pusher mechanism and ensuring smooth and rapid pallet transport.

[0026] The above-disclosed embodiments are only a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A six-row chain pre-push stack conveyor mechanism, comprising a pair of symmetrically distributed guardrails (2); Its features are, Also includes: The pallet lifting assembly (3) is used to eject the pallet; Straight-plate chain drive mechanism (1) is used for pallet conveying; The straight-plate chain transmission mechanism (1) includes three parallel pads (15) arranged in sequence. A pair of fixing plates (13) are fixedly installed between the middle pad (15) and the two side pads (15), and are connected as a whole through the fixing plates (13). Each pad (15) has two staggered guide wheels (16) rotatably arranged at both ends through bearings. Each of the rails (15) has a guard plate (12) fixedly connected to both sides of the bottom center. Six rows of sprockets (17) are rotatably arranged in the guard plate (12) through bearings. The guide wheel (16) and the six rows of sprockets (17) are connected by a chain (14). Each of the six rows of sprockets (17) is synchronously connected by a drive shaft (18). The drive shaft (18) passes through each guard plate (12). Each of the said track rails (15) is provided with a tensioning assembly (19) on one side of the six rows of sprockets (17) for tensioning the chain (14).

2. The six-row chain pre-push stack conveying mechanism according to claim 1, characterized in that, The straight-plate chain transmission mechanism (1) also includes a speed reduction motor (11) fixedly connected to the bottom surface of the guardrail frame (2), and the output end of the speed reduction motor (11) is connected to the transmission shaft (18).

3. The six-row chain pre-push stack conveying mechanism according to claim 1, characterized in that, The tensioning assembly (19) includes a tensioning block (191) connected to the bottom surface of each rail (15) by a fixing bolt, a tensioning fork (192) fixedly connected to each tensioning block (191), and a tensioning wheel (193) symmetrically arranged in each pair of guard plates (12) and in contact with the chain (14). The tensioning fork (192) is connected to the tensioning wheel (193) on one side.

4. The six-row chain pre-push stack conveying mechanism according to claim 3, characterized in that, Each of the guard plates (12) has an adjustment groove (101) at the position of the tension wheel (193), and the two side shafts of each tension wheel (193) extend from the adjustment groove (101) and are rotatably mounted on the tension fork (192).

5. A six-row chain pre-push stack conveying mechanism according to claim 2, characterized in that, The tension wheel (193) located on one side of the six-row sprocket (17) is fixed, while the tension wheel (193) connected to the tension fork (192) on the other side is adjustable and is used to tension the chain.

6. The six-row chain pre-push stack conveying mechanism according to claim 1, characterized in that, The pallet lifting assembly (3) includes a lifting cylinder (32) fixedly connected to the bottom surface of each fixed plate (13), a limiting cylinder (33) symmetrically embedded on both sides of each fixed plate (13), a support column (34) movably inserted into each limiting cylinder (33), and a push plate (31) fixedly connected to the top surface of each pair of support columns (34).

7. The six-row chain pre-push stack conveying mechanism according to claim 1, characterized in that, A support plate (22) is fixedly installed between the inner sides of the adjacent pad rails (15), and a limiting guide plate (21) for pallet positioning and guidance is fixedly installed on the support plate (22).

8. The six-row chain pre-push stack conveying mechanism according to claim 1, characterized in that, The guide wheels (16) at both ends of each of the said track (15) are higher than the adjacent guide wheels (16), and the six rows of sprockets (17) are lower than the guide wheels (16) on both sides.

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