CN111483792A - Laminate floor turning conveying and clearance feeding flap device - Google Patents

Abstract

The invention discloses a turning conveying and clearance feeding flap device for a composite floor. Including conveying mechanism, limit mechanism, lifting mechanism, chute mechanism, conveying chain mechanism, material blocking mechanism. The limit mechanism is located at the front end of the drum assembly of the drum assembly; in the lifting mechanism, two parallel belt conveyors are installed on the lifting frame assembly, and the belt conveyors are arranged in the drum assembly in a staggered manner; the tail end of the belt conveyor is located above the chute; the conveyor chain mechanism It includes a pair of short-pitch conveyor chains; the short-pitch conveyor chains are equipped with a number of square blocks separated by equal intercepts; the material blocking mechanism is located under the chute mechanism. The present invention can cooperate with the previous step of stamping the plate, and continue to turn the plate in the next step, replacing the manual turning and turning steps, and can complete the four integrated tasks of reversing, aligning, turning and separating the plate through ingenious design, saving a lot of money. The human and financial resources of the device are safe and reliable, and it can efficiently complete the steering conveying and gap feeding.

Description

Laminate floor turning conveying and clearance feeding flap device

technical field

The invention relates to a plate transfer and turning device, more particularly, to a turning transmission and intermittent feeding turning device used in the processing and production of composite floors.

Background technique

At present, the domestic plate processing field still mainly relies on manual work. With the advancement of technology, some simple and tedious tasks in the plate processing production line can be replaced by automated equipment. For example, in the production process, the sheet has been stamped in the previous step, and the sheet is facing up at this time. Next, the processing procedure of the front side of the sheet needs to be checked, so the sheet needs to be reversed and conveyed to the next section. In the production line, the laminate floor needs to be turned over. For these two steps, the existing processing equipment cannot meet the integration process of reversing and turning. Therefore, it is necessary to develop a new device, which can be used on one machine. An integrated device that completes the four steps of reversing, aligning, flipping and separating sheets.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to overcome the deficiencies of the existing devices, and to provide a device for turning, conveying and continuously turning over the composite floor on the production line, which can realize the four steps of reversing, aligning, turning and separating the composite floor.

The present invention is realized through the following technical solutions: a turning conveying and clearance feeding flap device for a composite floor, comprising a conveying mechanism, a limit mechanism, a lifting mechanism, a chute mechanism, a conveying chain mechanism, and a material blocking mechanism; the conveying mechanism includes a first a frame, a row of roller assemblies and a roller drive assembly for driving the roller assemblies are mounted on the first frame; the limiting mechanism is mounted on the first frame through a support plate, and the limiting mechanism is located at the front end of the roller assembly of the roller assembly; the The lifting mechanism includes a lifting frame assembly, and the lifting frame assembly is installed on the first frame by sliding up and down; two parallel belt conveyors are installed on the lifting frame assembly, and the belt conveyors are arranged in a staggered roller assembly. The transportation direction of the components is vertical; the chute mechanism includes a second frame, a circular arc chute is installed on the second frame, and the tail end of the belt conveyor is located above the chute; the conveyor chain mechanism includes a pair of parallel installations on the first The short-pitch conveyor chain on the second frame; the short-pitch conveyor chain is equipped with a number of square blocks separated by equal intervals; the short-pitch conveyor chain is driven by the drive sprocket assembly; the material blocking mechanism is located under the chute mechanism , the material blocking mechanism includes a lower baffle and an upper baffle installed on the second frame; the lower baffle is parallel to the short-pitch conveyor chain, and the lower baffle is lower than the plane of the short-pitch conveyor chain; the upper baffle is The baffle is located above the short-pitch conveyor chain, and the upper baffle is perpendicular to the short-pitch conveyor chain.

Further, the first frame has four legs, and the lower ends of the legs are fixed with nylon fixed foot cup I and casters.

The conveying mechanism includes a variable frequency speed regulating motor installed on the first frame, and the output end of the variable frequency speed regulating motor is installed with a driving sprocket I; A driven sprocket I is installed on the drum, and the driven sprocket I and the driving sprocket I are connected by a transmission chain; the drum assembly includes a plurality of conveying rollers arranged in parallel, and both ends of the conveying rollers are fixedly installed on the first roller through brackets. On the frame, a bearing is installed between the conveying roller and the bracket; the conveying roller and the driving roller are connected by a conveyor belt.

The limit mechanism includes a baffle plate I installed on the support plate through a limit adjustment assembly; the upper end of the support plate is horizontal, and the upper end of the support plate is provided with an elongated hole; the limit adjustment assembly includes a plate mounted on the support plate. The bolt in the long hole, the lower end of the bolt is connected to the baffle plate I.

A guide shaft assembly is installed between the periphery of the lifting frame assembly and the first frame in the lifting mechanism, and the guide shaft assembly is arranged vertically; a thin cylinder is also connected between the periphery of the lifting frame assembly and the first frame, and the thin cylinder is arranged vertically The belt conveyor includes a pair of support frames installed on the lifting frame assembly, the support frame is installed with a synchronous belt, and the two ends of the synchronous belt are installed with pulleys; the lifting frame assembly is installed with a conveyor drive assembly, and the conveyor drives The component drives connect the timing belt.

A tensioning mechanism is installed at one end of the synchronous belt.

The second frame has four legs, and the lower end of the legs is fixed with a nylon fixed foot cup II.

The chute is installed on a bracket body, and the bracket body is fixed on the second frame by bolts; a baffle II is arranged at the lower and rear of the chute, and the baffle II is fixed on the second frame through a material blocking column.

The upper baffle is fixed in the long hole opened on the bracket body by bolts.

The drive sprocket assembly includes a conveying motor base plate fixed on the second frame, and a rib plate is connected between the conveying motor base plate and the second frame; A drive sprocket is installed at the output end of the variable frequency speed regulation motor; a pair of chain guide rails are fixed on the second frame, and the short-pitch conveyor chain is correspondingly installed on the chain guide rails; both ends of the short-pitch conveyor chain are installed with The driving sprocket is connected with the driving sprocket through a transmission chain.

Using the technical solution provided by the present invention, compared with the known known technology, has the following beneficial effects:

(1) The conveying mechanism of the present invention includes a conveying roller, a bracket, a bearing and a roller drive assembly. The bracket is installed on the first frame, and the rollers are installed on it in parallel. The structure is simple, and the plate can be continuously conveyed, which is safe, reliable, and economical. labor force;

(2) The lifting mechanism of the present invention includes a guide shaft assembly, a thin cylinder, a timing belt, a tensioning mechanism, a lifting frame assembly, and a conveyor drive assembly. The timing belt is parallel to the conveying roller and is installed between two adjacent conveying rollers. The moving direction of the conveying roller is perpendicular to the moving direction of the synchronous belt. When the plate moves from the conveying roller to the baffle plate I, the synchronous belt will rise to a height under the push of the thin cylinder, and the synchronous belt will drive the plate to move in the other direction, which plays the role of reversing. function, so as to achieve the purpose of plate turning;

(3) The flapping device of the present invention includes a chute, and the purpose of flapping is realized with the assistance of the chute. Compared with the use of a motor flapping, the principle is clear, the structure is simple, the manufacturing cost is low, energy is saved, and there is no pollution;

(4) The baffle mechanism of the present invention includes an upper baffle and a lower baffle. The lower baffle is parallel to the short-pitch conveyor chain and is lower than the plane of the short-pitch conveyor chain; the upper baffle is connected to the short-pitch conveyor chain. The chain is vertical, and its purpose is: the plates turned over by the flap structure are uniformly close to the side of the upper baffle, which can realize the automatic alignment of the plates without manual alignment, save labor, high production efficiency, and save time and effort;

(5) Small rectangular blocks are installed on the short-pitch conveyor chain of the present invention, and the rectangular blocks are higher than the plane of the chain. When the chain is conveyed, the small rectangular blocks move together with the chain, and the bottom is taken away under the stacked plates. The upper plate is blocked by the function of the upper baffle, so only one plate can be conveyed at a time to achieve the purpose of gap feeding, and the accumulated plates can be separated;

(6) The present invention can realize the four processes of turning, aligning, turning over and conveying the board through ingenious design, and the work is safe and reliable. It is suitable for the field of board production, which can greatly improve the production efficiency and ensure the production quality. The whole device has a simple structure. , fully considering the economy and environmental protection of the machine;

(7) The present invention can integrate each working step on two matched machines, and is suitable for use in the field of sheet metal production, which can improve the automation level of the production line, save manpower and financial resources, save energy, low processing and manufacturing costs, and be safe, reliable, and environmentally friendly. Saving, economical and practical advantages.

Description of drawings

1 is a schematic three-dimensional structure diagram of a steering conveying device according to an embodiment of the present invention;

2 is a three-dimensional front view of a steering conveying device according to an embodiment of the present invention;

Fig. 3 is the left perspective view of the steering conveying equipment according to the embodiment of the present invention;

4 is a perspective top view of the steering conveying device according to the embodiment of the present invention;

In the figure: 1-first frame; 2-roller assembly; 3-guide shaft assembly; 4-conveyor drive assembly; 5-belt conveyor; 6-elevating frame assembly; 7-roller drive assembly; 8-limit adjustment Components; 9- Driving Sprocket I; 10- Frequency Conversion Motor; 11- Bracket; 12- Nylon Fixed Foot Cup I; 13- Thin Cylinder; 14- Caster Wheel; 15- Timing Belt; 16- Fixed Plate; 17- Drive Roller; 18 - baffle plate I; 19 - supporting plate; 20 - tensioning mechanism; 21 - supporting frame; 22 - conveying roller.

FIG. 5 is a schematic three-dimensional structure diagram of a gap feeding flap device according to an embodiment of the present invention;

FIG. 6 is a three-dimensional front view of the gap feeding flap device according to the embodiment of the present invention;

Fig. 7 is the left perspective view of the gap feeding flap device according to the embodiment of the present invention;

FIG. 8 is a three-dimensional top view of the gap feeding flap device according to the embodiment of the present invention;

In the figure: 31-Second frame; 32-Chute; 33-Baffle column; 34-Drive sprocket assembly; 35-Drive sprocket; 36-Short pitch conveyor chain; 37-Chain guide rail; 38-Active chain Wheel; 39- Conveying motor seat plate; 40- Rib plate; 41- Hexagon head bolt; 42- Hexagon nut; 43- Nylon fixed foot cup II; 44- Frequency conversion motor; 45- Bracket body; 46 Baffle plate II; 47, the lower baffle; 48, the upper baffle.

Detailed ways

The following is a specific embodiment of the present invention, and the present invention will now be further described with reference to the accompanying drawings.

The utility model relates to a turning conveying and clearance feeding flap device for a composite floor, comprising two separate turning conveying devices and a clearance feeding turning device.

Referring to FIGS. 1 to 4 , the steering conveying device includes a first frame 1 , a conveying mechanism, a limiting mechanism, and a lifting mechanism. The first frame 1 has four legs, and the lower ends of the legs are fixed with nylon fixed foot cups I12 and casters 14 .

Conveying mechanism:

A row of roller assemblies 2 and a roller drive assembly 7 for driving the roller assemblies 2 are mounted on the first frame 1;

The conveying mechanism includes a variable frequency speed regulating motor 10 installed on the first frame 1 , and a driving sprocket I9 is installed at the output end of the variable frequency speed regulating motor 10 . The drum driving assembly 7 includes a driving drum 17 mounted on the first frame 1 through the fixing plate 16 , and a driven sprocket I is mounted on the driving drum 17 , and the driven sprocket I and the driving sprocket I9 are connected by a transmission chain. The roller assembly 2 includes a plurality of conveying rollers 22 arranged in parallel, and the length of the conveying rollers 22 is greater than that of the sheet. Both ends of the conveying roller 22 are fixedly installed on the first frame 1 through the bracket 11, and bearings are installed between the conveying roller 22 and the bracket 11; the conveying roller 22 and the driving roller 17 are connected by a conveyor belt.

Limiting mechanism:

The limit mechanism is installed on the first frame 1 through the support plate 19, and the limit mechanism is located at the front end of the drum assembly 2;

The limit mechanism includes a baffle plate I18 installed on the support plate 19 through the limit adjustment assembly 8; the upper end of the support plate 19 is horizontal, and the upper end of the support plate 19 is provided with an elongated hole; the limit adjustment assembly 8 includes an elongated hole installed on the support plate 19. The bolt in the hole, the lower end of the bolt is connected to the baffle plate I18, and the position of the baffle plate I18 can be adjusted through the bolt and the elongated hole to adapt to different sizes of plates. The baffle plate I18 is located in front of the conveying roller. When the plate moves forward under the driving of the conveying roller, the baffle plate I18 contacts with the edge of the plate until the baffle plate I18 is in contact with each other to achieve the purpose of plate alignment.

Lifting mechanism:

The lifting mechanism includes a lifting frame assembly 6, and the lifting frame assembly 6 is slidably mounted on the first frame 1; two parallel belt conveyors 5 are installed on the lifting frame assembly 6, and the belt conveyors 5 are arranged in a staggered manner in the roller assembly 2, The conveying direction of the belt conveyor 5 is perpendicular to the conveying direction of the roller assembly 2;

A guide shaft assembly 3 is installed between the periphery of the lift frame assembly 6 and the first frame 1 in the lifting mechanism, and the guide shaft assembly 3 is arranged vertically; a thin cylinder 13 is also connected between the periphery of the lift frame assembly 6 and the first frame 1, The thin cylinders 13 are arranged vertically. The lifting and lowering of the lifting frame assembly 6 is realized by the thin air cylinder 13;

The belt conveyor 5 includes a pair of support frames 21 installed on the lift frame assembly 6, the support frame 21 is mounted with a synchronous belt 15, and pulleys are installed at both ends of the timing belt 15; the lift frame assembly 6 is installed with a conveyor drive assembly 4. The conveyor drive assembly 4 drives and connects the synchronous belt 15;

A tensioning mechanism 20 is installed at one end of the timing belt 15 . The tensioning mechanism 20 includes a rectangular bar parallel to the timing belt 1 . Two bolts of the rectangular bar are mounted on the first frame 1 , and the front and rear positions of the adjusting bolts drive the bars to move, thereby adjusting the tightness of the timing belt 15 .

With reference to Figures 5 to 8, the gap feeding flap device includes a second frame 31, a chute mechanism, a conveyor chain mechanism, and a material blocking mechanism. The second frame 31 has four legs, and the lower ends of the legs are fixed with nylon fixed foot cups II43.

Chute mechanism:

The chute mechanism includes an arc-shaped chute 32 installed on the second frame 31 . The tail end of the belt conveyor 5 in the diverting conveying device is located above the chute 32, and the plate is conveyed to the chute 32 for turning over. The chute 32 is installed on the bracket body 45, and the bracket body 45 is fixed on the second frame 31 by bolts; After the plate falls into the chute 32, the turning is completed along the chute 32.

Conveyor chain mechanism:

The conveyor chain mechanism includes a pair of short-pitch conveyor chains 36 installed in parallel on the second frame 31; the short-pitch conveyor chains 36 are provided with a number of square blocks separated by equal intercepts; the short-pitch conveyor chains 36 are driven by the drive sprocket. component 34 drives;

The driving sprocket assembly 34 includes a conveying motor base plate 39 fixed on the second frame 31 , and a rib 40 is connected between the conveying motor base plate 39 and the second frame 31 . A variable frequency speed regulating motor 44 is installed on the conveying motor base plate 39 , and a driving sprocket 38 is installed at the output end of the variable frequency speed regulating motor 44 . A pair of chain guide rails 37 are fixed on the second frame 31 , and the short-pitch conveyor chains 36 are correspondingly installed on the chain guide rails 37 ; both ends of the short-pitch conveyor chains 36 are installed with driving sprockets 35 , and the driving sprockets 35 It is connected with the driving sprocket 38 through the transmission chain;

A tensioning mechanism is also installed at one end of the short-pitch conveyor chain 36 , and the tensioning mechanism adjusts the position through the hexagonal head bolt 41 and the hexagonal nut 42 to adjust the tightness of the short-pitch conveyor chain 36 .

Stopper mechanism:

The material blocking mechanism is located under the chute mechanism, and the material blocking mechanism includes a lower baffle 47 and an upper baffle 48 installed on the second frame 31 . The lower baffle 47 is parallel to the short-pitch conveyor chain 36 , and the lower baffle 47 is lower than the plane of the short-pitch conveyor chain 36 . The upper baffle 48 is located above the short-pitch conveyor chain 36 , and the upper baffle 48 is perpendicular to the short-pitch conveyor chain 36 . The upper baffle plate 48 is fixed in the long holes opened on the bracket body 45 by bolts, and the upper and lower baffle plates 48 can be adjusted up and down through the bolts and the long holes to adapt to plates of different thicknesses.

working principle:

When working, the laminate floor is punched, and a large plate will be punched into three to five small pieces according to the requirements of use. After the punching is completed, the plates move forward along the conveying roller. This is because the synchronous belt is not raised and the plane of the synchronous belt is low. At the cutting surface of the conveying roller, the plate moves to the baffle plate I18 driven by the conveying roller, and the baffle plate I18 contacts the edge of the plate so that the plate is automatically aligned;

At the same time, the thin air cylinder 13 moves, the piston rod of the thin air cylinder extends, and with the cooperation of the guide shaft assembly 3, the synchronous belt rises in the vertical direction, the plane of the synchronous belt is higher than the plane of the conveying roller, and the synchronous belt is driven by the conveyor. Driven by the components, it drives the plate to be conveyed in a reverse direction. Since the movement direction of the conveying roller is perpendicular to the movement direction of the synchronous belt, the plate is turned and conveyed under the drive of the synchronous belt, which can shorten the length of the production line and cooperate with the next step to turn the plate. the conduct of the process;

Driven by the synchronous belt, the plate moves toward the chute, and in the direction of the chute, the plate slides down the chute. At the same time, a lower baffle and an upper baffle are provided to make a group of plates neatly stacked together. At this time, a group of plates is turned over. board movement;

At the same time, the short-pitch conveyor chain 36 also moves under the drive of the variable frequency speed regulating motor 44, and the small rectangular block plane on the short-pitch conveyor chain 36 is higher than the plane of the lower baffle plate. Because the gap between the plane of the upper baffle 48 and the chute support can only pass through one plate, that is, each time a plate is taken away, the plate is separated on the short-pitch conveyor chain 36. After the plate flip is completed, all the plates are removed. It is facing upwards. At this time, the plates need to be checked manually to check the processing quality of the plates. The qualified plates continue to be transported to the palletizer, and the unqualified plates are taken down by the staff;

After the synchronous belt is conveyed, the thin cylinder 13 falls, the plane of the synchronous belt is lower than the plane of the conveying roller, and the conveying roller can continue to drive the plate from the punching machine. Repeating the above steps can realize the turning conveying and gap feeding turning operations in the field of sheet metal production.

The turning conveying and gap feeding flap device in the field of sheet metal production in this embodiment can cooperate with the turning conveying and gap feeding in the production of the previous stage of composite floor, save a lot of human resources, the design is ingenious and reasonable, and the work is safe and reliable. ; Adopt stepper motor acceleration and decelerator, and at the same time cooperate with the driving method of pneumatic drive, which is more efficient, efficient, economical and practical, suitable for widespread application in sheet metal production enterprises.

The present invention and its embodiments have been described above schematically, and the description is not restrictive, and what is shown in the accompanying drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it, without departing from the purpose of the present invention, any structural modes and embodiments similar to this technical solution are designed without creativity, which shall belong to the protection scope of the present invention. .

Claims (10)

1. The utility model provides a composite floor turns to and carries and clearance feed plate turnover which characterized in that: the device comprises a conveying mechanism, a limiting mechanism, a lifting mechanism, a chute mechanism, a conveying chain mechanism and a material blocking mechanism;

the conveying mechanism comprises a first frame (1), a row of roller assemblies (2) and a roller driving assembly (7) for driving the roller assemblies (2) are mounted on the first frame (1);

the limiting mechanism is arranged on the first frame (1) through a supporting plate (19), and is positioned at the front end of the roller assembly (2);

the lifting mechanism comprises a lifting rack component (6), and the lifting rack component (6) is vertically and slidably arranged on the first frame (1); two belt conveyors (5) which are arranged in parallel are mounted on the lifting rack assembly (6), the belt conveyors (5) are arranged in the roller assemblies (2) in a staggered manner, and the conveying direction of the belt conveyors (5) is vertical to the conveying direction of the roller assemblies (2);

the chute mechanism comprises a second rack (31), an arc chute (32) is mounted on the second rack (31), and the tail end of the belt conveyor (5) is positioned above the chute (32);

the conveying chain mechanism comprises a pair of short-pitch conveying chains (36) which are arranged on the second rack (31) in parallel; the short-pitch conveying chain (36) is provided with a plurality of square blocks with equal intercept separation; the short-pitch conveyor chain (36) is driven by a drive sprocket assembly (34);

the material blocking mechanism is positioned below the chute mechanism and comprises a lower baffle plate (47) and an upper baffle plate (48) which are arranged on the second rack (31); the lower baffle (47) is parallel to the short-pitch conveying chain (36), and the lower baffle (47) is lower than the plane of the short-pitch conveying chain (36); the upper baffle (48) is positioned above the short-pitch conveying chain (36), and the upper baffle (48) is perpendicular to the short-pitch conveying chain (36).

2. The composite floor turn-conveying and gap-feed flap arrangement as claimed in claim 1, characterized in that: the first frame (1) is provided with four supporting legs, and a nylon fixed foot cup I (12) and a caster wheel (14) are fixed at the lower ends of the supporting legs.

3. The composite floor turn-conveying and gap-feed flap arrangement as claimed in claim 1, characterized in that: the conveying mechanism comprises a variable-frequency speed-regulating motor (10) arranged on the first frame (1), and a driving chain wheel I (9) is arranged at the output end of the variable-frequency speed-regulating motor (10);

the roller driving assembly (7) comprises a driving roller (17) which is arranged on the first frame (1) through a fixing plate (16), a driven chain wheel I is arranged on the driving roller (17), and the driven chain wheel I is connected with a driving chain wheel I (9) through a transmission chain;

the roller assembly (2) comprises a plurality of conveying rollers (22) which are arranged in parallel, two ends of each conveying roller (22) are fixedly arranged on the first frame (1) through supports (11), and bearings are arranged between the conveying rollers (22) and the supports (11); the conveying roller (22) is connected with the driving roller (17) through a conveyor belt.

4. The composite floor turn-conveying and gap-feed flap arrangement as claimed in claim 1, characterized in that: the limiting mechanism comprises a baffle I (18) which is arranged on the supporting plate (19) through a limiting adjusting component (8); the upper end of the supporting plate (19) is horizontal, and a long hole is formed in the upper end of the supporting plate (19); the limiting adjusting assembly (8) comprises a bolt installed in a long hole of a supporting plate (19), and the lower end of the bolt is connected with the baffle I (18).

5. The composite floor turn-conveying and gap-feed flap arrangement as claimed in claim 1, characterized in that: a guide shaft assembly (3) is arranged between the periphery of a lifting rack assembly (6) in the lifting mechanism and the first frame (1), and the guide shaft assembly (3) is vertically arranged; a thin cylinder (13) is connected between the periphery of the lifting rack component (6) and the first frame (1), and the thin cylinder (13) is vertically arranged;

the belt conveyor (5) comprises a pair of supporting frames (21) arranged on the lifting rack assembly (6), a synchronous belt (15) is arranged on each supporting frame (21), and belt wheels are arranged at two ends of each synchronous belt (15); the lifting rack assembly (6) is provided with a conveyor driving assembly (4), and the conveyor driving assembly (4) is driven to be connected with a synchronous belt (15).

6. The composite floor turn-conveying and gap-feed flap arrangement as claimed in claim 5, characterized in that: and one end of the synchronous belt (15) is provided with a tensioning mechanism (20).

7. The composite floor turn-conveying and gap-feed flap arrangement as claimed in claim 1, characterized in that: the second rack (31) is provided with four supporting legs, and a nylon fixed foot cup II (43) is fixed at the lower ends of the supporting legs.

8. The composite floor turn-conveying and gap-feed flap arrangement as claimed in claim 1, characterized in that: the chute (32) is arranged on the support body (45), and the support body (45) is fixed on the second rack (31) through bolts; a baffle II (46) is arranged below and behind the chute (32), and the baffle II (46) is fixed on the second rack (31) through a material blocking column (33).

9. The composite floor turn-conveying and gap-feed flap arrangement as claimed in claim 1, characterized in that: the upper baffle (48) is fixed in a long hole formed in the bracket body (45) through a bolt.

10. The composite floor turn-conveying and gap-feed flap arrangement as claimed in claim 1, characterized in that: the driving chain wheel assembly (34) comprises a conveying motor seat plate (39) fixed on the second rack (31), and a rib plate (40) is connected between the conveying motor seat plate (39) and the second rack (31);

a variable-frequency speed regulating motor (44) is arranged on the conveying motor seat plate (39), and a driving chain wheel (38) is arranged at the output end of the variable-frequency speed regulating motor (44);

a pair of chain guide rails (37) is fixed on the second rack (31), and the short-pitch conveying chains (36) are correspondingly arranged on the chain guide rails (37); and driving chain wheels (35) are arranged at two ends of the short-pitch conveying chain (36), and the driving chain wheels (35) are connected with the driving chain wheel (38) through a transmission chain.

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