JP2022012791A - Harvester - Google Patents

Abstract

To make it possible to obtain a threshing cylinder inexpensively in a harvester equipped with a thresher that receives and threshes a harvest harvested by a harvesting part.SOLUTION: A thresher 10 is equipped with a threshing cylinder 21. The threshing cylinder 21 comprises: a raking part 30 disposed at a front part of the threshing cylinder 21, for raking a product to be threshed that is charged into a threshing chamber 20 toward a rear part of the threshing cylinder 21; and a threshing part 31 disposed so as to continue to a rear part of the raking part 30, for threshing the product to be threshed. The raking part 30 comprises: a base part 32; and a spiral blade 33 stood up from an outer peripheral part of the base part 32, for raking the product to be threshed toward the rear part of the threshing cylinder 21. The base part 32 is configured to have a cylindrical shape whose outer diameter from the front end part to the rear end part of the raking part 30 is constant, and which has a shaft core P of the threshing cylinder as the center.SELECTED DRAWING: Figure 2

Description

The present invention relates to a harvester.

The harvester is provided at the front part of the machine, has a harvesting section for harvesting crops in the field, a transport device for transporting the crops harvested by the harvesting section toward the rear of the machine, and a crop transported by the transport device. The threshing device is provided with a threshing device for accepting the threshing product as a threshing product and threshing the received threshing product. Some are rotatably provided with a threshing cylinder for threshing the threshed product put into the handling chamber, and a receiving net provided around the lower portion of the handling cylinder. Further, in this type of harvester, the handling cylinder has a scraping portion provided at the front portion of the handling cylinder and scrapes the threshed product charged into the handling chamber toward the rear portion of the handling cylinder. Some are provided in a continuous state at the rear portion of the scraping portion, and are provided with a handling processing section for handling and processing the threshed product from the scraping portion.

As a harvester of this kind, there is a combine shown in Patent Document 1. The combine shown in Patent Document 1 is provided with a harvesting section as a harvesting section, a transport section as a transport device, and a threshing device. The threshing device is provided with a handling chamber and a handling cylinder, and the handling cylinder is provided with a scraping unit and a handling processing unit.

Japanese Unexamined Patent Publication No. 2019-4765

In the above-mentioned harvester, generally, the scraping portion is a spiral that rises from the base portion and the outer peripheral portion of the base portion toward the outside in the radial direction of the handling cylinder and scrapes the threshed product toward the rear portion of the handling cylinder. Feathers and are provided. Conventionally, the base portion is configured to have a narrow front side having a smaller diameter toward the front end side of the scraped portion, which makes it difficult to manufacture the scraped portion and increases the manufacturing cost of the handling cylinder.

The present invention provides a harvester capable of obtaining a handling cylinder at low cost.

The threshing device according to the present invention
A harvesting section provided at the front of the machine for harvesting crops in the field, a transport device for transporting the crops harvested by the harvesting section toward the rear of the machine, and a threshing product for the crops transported by the transport device. A threshing device for threshing the accepted and accepted threshing product is provided, and the threshing device is rotatably provided with a handling chamber in which the crop is thrown as the threshing processed product by the transport device and the handling chamber. A threshing cylinder for threshing the threshed product put into the handling chamber and a receiving net provided around the lower part of the handling cylinder are provided, and the handling cylinder is provided with the front portion of the handling cylinder. It is provided in a state of being continuous with a scraping portion for scraping the threshed product charged into the handling chamber toward the rear portion of the handling cylinder and the rear portion of the scraping portion, and threshing from the scraping portion. A handling processing unit for handling and processing the processed material is provided, and the threshing portion is raised from the base portion and the outer peripheral portion of the base portion toward the outside in the radial direction of the handling body to prepare the threshing processed material. A spiral blade that scrapes toward the rear portion of the handling cylinder is provided, and the base portion has a constant outer diameter from the front end portion to the rear end portion of the scraping portion and has a shaft core of the handling cylinder. It is configured in a cylindrical shape centered on it.

According to this configuration, since the shape and structure of the base portion are simple, it is easy to manufacture the scraped portion and the handling cylinder can be obtained at low cost.

In the present invention
It is preferable that the corner portion of the spiral blade on the side opposite to the base portion side of the front end is angular.

According to this configuration, the threshed product charged in the front part of the handling chamber is easily caught by the front end of the spiral blade, so that even if a large amount of threshed material is charged, the threshed product is handled by the scraping unit in the processing unit. It is squeezed firmly and threshed smoothly.

In the present invention
It is preferable that the rising height of the front end portion of the spiral blade from the outer peripheral portion is higher than the rising height of the portion other than the front end portion of the spiral blade from the outer peripheral portion.

According to this configuration, the threshed product caught on the tip of the spiral blade is hard to come off from the spiral blade, so even if a large amount of threshed product is thrown in, the threshed product is firmly scraped into the handling unit by the scraping unit. It is threshed smoothly.

In the present invention
The transport device is rotatably provided at the transport end portion of the transport device with the axis in the direction along the lateral width direction of the handling chamber as the center of rotation, and the crop is treated as a threshing product by being driven to rotate. It is preferable that a rotating member to be put into the chamber is provided, and the shaft core is arranged at a position lower than the lower end of the peripheral surface on the handling body side in the receiving net.

According to this configuration, the threshed product charged into the front part of the handling chamber by the rotating member is supplied to the spiral blade from below the spiral blade and easily caught on the spiral blade, so that a large amount of threshed product is charged. Even in this case, the threshed product is firmly scraped into the handling section by the scraping section and the threshing process is smoothly performed.

In the present invention
The transport device is rotatably provided at the transport end portion of the transport device with the axis in the direction along the lateral width direction of the handling chamber as the center of rotation, and by being rotationally driven, the crop is treated as a threshing product. It is preferable that a rotating member to be put into the chamber is provided, and the shaft core is arranged at a position lower than the lower end portion of the spiral blade.

According to this configuration, the threshed product charged into the front part of the handling chamber by the rotating member is supplied to the spiral blade from below the spiral blade and easily caught by the spiral blade, so that a large amount of threshed product is charged. Even in such a case, the threshed product is firmly scraped into the handling section by the scraping section and the threshing process is smoothly performed.

In the present invention
It is preferable that the front portion of the receiving net is extended to just below the rear portion of the scraping portion, and the rear portion of the scraping portion and the front portion of the receiving net overlap in the front-rear direction.

According to this configuration, the threshed material is supplied between the handling section and the receiving net and is handled by the spiral blade and the receiving net at the rear part of the scraping section before being handled by the handling section and the receiving net. Since it is processed, it is easy to avoid poor threshing even when a large amount of threshed material is put into the handling room.

In the present invention
The handling processing unit is provided in a state of being lined up in the handling cylinder circumferential direction, and has a rod-shaped handling tooth support member in the direction along the handling body shaft core direction and a plurality of locations in the handling body shaft core direction in the handling tooth support member. It is preferable that a plurality of handling teeth projecting outward in the radial direction of the handling body are provided.

According to this configuration, in the handling processing section, the threshed material flows between the inside and outside of the handling cylinder through the space between the handling tooth support members, and is subjected to the handling action by the handling teeth and the receiving net. Since the threshing action is received by the impact of the tooth handling support member, even when a large amount of threshed product is thrown in, the threshed product is not clogged and the threshing process is smoothly performed, and it is easy to avoid poor threshing.

It is a left side view which shows the whole of the ordinary type combine. It is a vertical sectional side view of a threshing device. It is a front view of the threshing part. It is a side view which shows the rear part of a transfer device, and the front part of a handling cylinder. It is a front view which shows the front end part of a spiral blade.

Hereinafter, embodiments that are an example of the present invention will be described with reference to the drawings.
In the following description, the direction of the arrow F shown in FIG. 1 is "front of the aircraft", the direction of the arrow B is "rear of the aircraft", and the arrow U of the traveling aircraft of the ordinary combine (an example of the "harvester"). The direction of is "above the aircraft", the direction of the arrow D is "below the aircraft", the direction on the front side of the paper is "left side of the aircraft", and the direction on the back side of the paper is "right side of the aircraft".

[Whole ordinary combine]
As shown in FIG. 1, the ordinary combine has an airframe frame 1 formed by connecting a plurality of steel materials such as square pipe materials, and a pair of left and right crawler type traveling devices 2 provided under the airframe frame 1. It is equipped with a traveling machine having a. A driving unit 4 and a harvesting / transporting device 6 are provided at the front portion of the traveling machine body (front part of the machine body). The driver unit 4 is provided with a driver's seat 3. An engine 5 is provided below the driver's seat 3. The harvest transport device 6 is provided in front of the harvest transport device 6, and is used to harvest rice, wheat, soybeans and other crops to be planted in the field by using a varican-type harvesting device 7. And a transport device 9 provided at the rear of the harvest transport device 6 and transporting the harvested grain rice harvested by the harvest section 8 to a predetermined position of the traveling machine. At the rear of the traveling machine, a threshing device 10 that receives a harvested grain culm transported by a transport device 9 and threshs it, and sorts a threshed product after threshing, and a grain obtained by the threshing device 10. A grain tank 11 for collecting and storing is provided. A grain discharging device 12 for discharging grains from the grain tank 11 is connected to the rear portion of the grain tank 11.

[Structure of transport device]
As shown in FIGS. 1 and 2, the transport device 9 includes a transport case 13 extending from the rear portion of the harvesting section 8 to the front portion of the threshing device 10. Inside the transport case 13, an endless rotating band-shaped body 14 rotatably provided over a lower portion in the transport case and an upper portion in the transport case is provided. Locking transport portions 14a are provided at a plurality of locations in the longitudinal direction of the endless rotating strip 14. As shown in FIGS. A rotating member 15 is provided. As shown in FIG. 4, the shaft core 15a of the rotating member 15 is arranged at a position lower than the lower end 25t of the peripheral surface on the handling cylinder side in the receiving net 25 provided in the threshing device 10. In the present embodiment, the receiving net 25 is provided with a rod-shaped member located below the handling cylinder 21 in a state of being formed in an arc shape along the circumferential direction of the handling cylinder 21. The lower end 25t of the peripheral surface on the handling cylinder side is the lower end of the portion of the rod-shaped member located at the lowest position in the front-rear direction of the handling cylinder. The shaft core 15a of the rotating member 15 is arranged at a position lower than the lower end portion 33t of the spiral blade 33 included in the scraping portion 30 provided in the handling cylinder 21. The rotating member 15 throws the cut grain culm from the endless rotating strip 14 into the front part of the handling chamber 20. Specifically, the rotating member 15 is provided with a release blade 15b in a state covering the entire width of the transfer path in the transfer device 9. Three release blades 15b are arranged in the circumferential direction of the rotating member 15. The rotating member 15 discharges the cut grain culm from the endless rotating strip 14 from below the spiral blade 33 toward the spiral blade 33 by the releasing blade 15b. In the present embodiment, the rotating member 15 is provided above the transport end portion of the endless rotating band-shaped body 14, but the present invention is not limited to this, and the transport end portion of the endless rotating band-shaped body 14 is wound around. It may adopt the structure supported by the rotation support shaft of the wheel body 16.

In the transfer device 9, the rotating member 15 is driven by the power from the engine 5 in the rotation direction indicated by the arrow Z (see FIG. 4) with the axis 15a as the center of rotation. The ring body 16 around which the transport end side of the endless rotating band-shaped body 14 is wound is driven by the power transmitted from the rotating member 15 by the endless belt (not shown), and the endless rotating band-shaped body 14 is driven by a ring. It is driven by the body 16. The entire culm from the stock root to the tip of the harvested culm from the harvesting section 8 is lifted inside the transport case 13 by the locking transport section 14a of the endless rotating strip 14. The harvested grain culm conveyed by the endless rotating strip 14 is inherited by the rotating member 15, and is released from below the spiral blade 33 toward the scraping portion 30 by the releasing blade 15b of the rotating member 15, and the threshing device 10 It is put into the handling room 20 of.

[Streshing device configuration]
In the explanation of the threshing device 10 and the handling cylinder 21, the processing of the threshing device 10 and the handling cylinder 21 is performed with the processing start end side [grain culm input side (left side of the paper in FIG. 2)] of the threshing device 10 and the handling cylinder 21 as "front". The terminal side [grain culm discharge side (right side of the paper in FIG. 2)] is defined as "rear".

As shown in FIG. 2, the threshing device 10 includes a threshing section 10A provided in the upper part of the threshing device 10 and a sorting section 10B provided below the handling chamber 20 in the threshing section 10A. In the threshing device 10, the threshing processing direction in the threshing unit 10A coincides with the front-rear direction of the traveling machine, and the upper side of the threshing processing direction is set to be located on the front side of the traveling machine.

As shown in FIG. 2, the threshing section 10A includes a handling chamber 20 formed in the upper part of the threshing device 10. A handling cylinder 21 is provided in the handling chamber 20. The handling cylinder 21 is rotationally driven in a clockwise direction (direction indicated by an arrow X in FIG. 3) with the handling cylinder support shaft 22 as the center of rotation. A supply port 23 is formed in the lower front portion of the handling chamber 20 to allow the cut grain culm to be charged into the handling chamber 20. A dust outlet 24 is formed in the lower rear portion of the handling chamber 20 to enable the threshing processed material such as a threshing culm and a cut straw to be discharged to the outside of the handling chamber. A receiving net 25 is provided around the lower part of the handling cylinder 21 (the area below the handling cylinder 21 in the periphery of the handling cylinder 21). The receiving net 25 is configured in a concave type.

The handling chamber 20 is formed by a front support wall 26 and a rear support wall 27 that support the handling cylinder 21, a top plate 28 provided above the handling cylinder 21, a receiving net 25, and the like. A plurality of dust feeding valves 29 arranged in the front-rear direction of the handling chamber 20 are provided inside the top plate 28. As shown in FIG. 2, the handling cylinder 21 has a scraping portion 30 provided in the front portion of the handling cylinder 21 and a handling portion provided in a portion of the handling cylinder 21 on the rear side of the scraping portion 30. A processing unit 31 is provided. The handling unit 31 is continuous with the rear portion of the scraping unit 30.

In the threshing section 10A, all the culms from the stock root to the tip of the harvested culm thrown into the front part of the handling chamber 20 through the supply port 23 by the rotating member 15 in the transport device 9 are used as the threshing section by the threshing section 30. It is scraped toward the rear part of the handling cylinder 21 and threshed by the handling processing unit 31 and the receiving net 25. The threshed product to be threshed is subjected to rotational power by the rotating hazing processing unit 31 to hit the dust feeding valve 29, and is guided by the dust feeding valve 29 so as to flow toward the rear of the handling chamber 20. The threshed product is threshed while being transferred toward the rear of the handling chamber 20 by the handling processing unit 31. The grains obtained by the threshing process leak from the receiving net 25. Threshed products such as threshed culms and cut straw generated by the threshing process are discharged from the dust discharge port 24 to the outside of the handling chamber 20.

[Structure of handling body]
As shown in FIG. 2, the handling cylinder 21 is provided in the handling chamber 20 in a posture along the front-rear direction of the handling chamber 20. The handling cylinder 21 includes a handling cylinder support shaft 22 that is rotationally driven around the handling cylinder shaft core P, a scraping portion 30 supported by the front portion of the handling cylinder support shaft 22, and a scraping portion 30. A handling processing unit 31 supported by the handling cylinder support shaft 22 in a state of being continuous to the rear portion is provided.

[Structure of scraping part]
As shown in FIGS. The spiral blade 33 that has been started up is provided. As shown in FIGS. ing. The spiral blades 33 are provided in a parallel state of four, and are quadruple spiral blades.

As shown in FIGS. 3 and 5, the spiral blade 33 is configured such that the corner portion 33a on the side opposite to the base portion side of the front end of the spiral blade 33 is angular. In the spiral blade 33, the rising height H1 of the front end portion 33b of the spiral blade 33 from the base portion 32 is higher than the rising height H2 of the portion 33c other than the front end portion of the spiral blade 33 from the base portion 32. It is configured in.

As shown in FIGS. It's a duplicate. Preferably, the front portion 25a of the receiving net 25 is extended to just below the front-rear intermediate portion in the suction portion 30, and the front-rear intermediate portion in the suction portion 30 and the front portion 25a of the receiving net 25 overlap in the front-rear direction. Configure to be.

As shown in FIGS. 3 and 4, a guide portion 34 for guiding the cut grain culm from the supply port 23 to the scraping portion 30 is provided below the scraping portion 30. The guide portion 34 is provided in a state of being inclined forward.

In the scraping portion 30, the base portion 32 is driven by the handling cylinder support shaft 22, and the quadruple spiral blades 33 are rotationally driven around the handling cylinder shaft core P. A spiral blade 33 that rotates all culms from the stock root to the tip of the harvested culm thrown into the front part of the handling chamber 20 through the supply port 23 by the rotating member 15 of the transport device 9 along the handling cylinder 34. It is squeezed toward the rear of 21. The cutting grain culm is released by the rotating member 15 from below the spiral blade 33 toward the spiral blade 33. The cut grain culm is guided by the guide portion 34 toward the scraping portion 30. Due to the angular tension of the corner portion 33a of the spiral blade 33, the cut grain culm is easily caught on the front end of the spiral blade 33. The cut grain culm caught on the front end of the spiral blade 33 is difficult to come off from the spiral blade 33 due to the high rising height at the front end portion 33b of the spiral blade 33. As a result, the harvested grain culm is firmly scraped toward the rear part of the handling cylinder 21 by the spiral blade 33.

[Structure of handling processing unit]
As shown in FIGS. There is. In this embodiment, six tooth handling support members 40 are provided. Each tooth handling support member 40 is composed of a rod-shaped member in the direction along the handling body shaft core P. In the support of the handle tooth support member 40 by the handle body support shaft 22, the handle body support shaft 22 and the handle tooth support member 40 are connected by a disk member 41 at a plurality of positions in the axial direction of the handle body support shaft 22. It is done by doing. The handling teeth 42 are erected on the handling tooth support member 40 as the outer peripheral portion of the handling processing portion 31 of the handling cylinder 21 toward the outside in the radial direction of the handling cylinder. The handling teeth 42 are erected from a plurality of positions in the handling tooth support member 40 in the direction of the handling barrel axis. The handling tooth 42 is composed of a rod-shaped member. The handling processing unit 31 is configured in a basket shape.

In the handling processing unit 31, the threshed material flows between the inside and outside of the handling cylinder 21 via the gap between the handling tooth support members 40, and is subjected to the handling action by the handling teeth 42 and the receiving net 25. In addition, it is threshed by being threshed by the impact of the tooth handling support member 40.

In the present embodiment, the tooth handling support member 40 is made of a round pipe steel material. In addition to the round pipe steel material, various rod-shaped members such as a round steel material, a square bar steel material, and a square pipe steel material can be adopted as the tooth handling support member 40. In the present embodiment, each of the handling teeth 42 is made of a round steel material. In addition to the round steel material, various rod-shaped members such as a square bar steel material, a round pipe material, and each pipe material can be adopted for the tooth handling 42.

[Structure of sorting unit]
As shown in FIG. 2, the sorting unit 10B includes a swing sorting device 45 provided below the receiving net 25 so as to be swing-driven, a wall insert 46 provided below the front of the swing sorting device 45, and a wall insert. Behind the 46, a first recovery section 47 and a second recovery section 48 provided below the swing sorting device 45 are provided. In the present embodiment, the first collection unit 47 and the second collection unit 48 are configured by a screw conveyor extending in the lateral width direction of the threshing device 10.

In the sorting unit 10B, the processed material leaked from the receiving net 25 is dropped and received by the swing sorting device 45, and the received processed material is shaken while being conveyed backward by the swing sorting device 45. In addition, the wall insert 46 receives the sorting wind supplied from the front lower part of the swing sorting device 45 toward the rear of the swing sorting device 45 and performs sorting processing. The clear grains as the first processed product obtained by the sorting process flow down to the first recovery unit 47 and are collected, and are conveyed to the lateral outside of the threshing device 10 on the grain tank side by the first collection unit 47. The untreated grains as the second processed part obtained by the sorting process flow down to the second collecting part 48 and are collected, and are conveyed to the lateral outside of the threshing device 10 on the grain tank side by the second collecting part 48. .. Sorting dust such as straw waste as the third processed product generated by the sorting process is discharged to the rear of the threshing device 10 together with the sorting wind from the dust discharge port 49 provided at the rear of the threshing device 10.

The clear grains conveyed by the first collection unit 47 are supplied to the grain tank 11 by the grain frying device 50 connected to the first collection unit 47. The untreated grains conveyed by the No. 2 recovery unit 48 are reduced to the starting end portion of the swing sorting device 45 by the reduction device 51 connected to the No. 2 collection unit 48.

[Another Embodiment]
(1) In the above-described embodiment, an example is shown in which a bar-shaped handling cylinder 21 in which the handling processing unit 31 is configured in a basket shape is adopted, but this is not the case. For example, a drum-shaped handling cylinder in which the handling processing unit 31 is configured in a cylindrical shape may be adopted. Further, the bar-shaped handling cylinder is not limited to the one provided with the six handling tooth support members 40, and may be provided with, for example, five or less or seven or more handling tooth support members.

(2) In the above-described embodiment, an example in which the spiral blade 33 is adopted in a state where the corner portion 33a is angular and the rising height H1 of the front end portion 33b is higher than the rising height H2 of a portion other than the front end portion. However, a spiral blade that does not have these configurations may be adopted.

(3) In the above-described embodiment, the front portion 25a of the receiving net 25 is extended to directly below the rear portion of the scraping portion 30, but the present invention is not limited to this and is not extended to directly below the scraping portion 30. It may be a thing.

(4) In the above-described embodiment, an example in which the quadruple spiral blade 33 is provided is shown, but the present invention is not limited to this. For example, it may be provided with three or less or five or more spiral blades.

The present invention can be applied to a combine harvester that targets rice, wheat, buckwheat, and the like, as well as a harvester that targets various crops such as corn.

8 Harvesting part 9 Transporting device 10 Threshing device 20 Handling room 21 Handling body 25 Receiving net 25a Front part 25t Lower end 30 Scraping part 31 Handling processing part 32 Base part 32D Outer diameter 33 Spiral blade 33a Square part 33b Front end part 33t Lower end part 40 Handle support member 42 Handle handle H1 Rise height H2 Rise height

Claims (7)

A harvesting section installed at the front of the machine to harvest crops in the field,
A transport device that transports the crops harvested by the harvesting section toward the rear of the machine, and
A threshing device that accepts the crops transported by the transport device as a threshing product and threshes the received threshing product is provided.
The threshing device includes a handling chamber in which crops are thrown as a threshing product by the transport device, and a handling cylinder rotatably provided in the handling chamber for threshing the threshing processed product put into the handling chamber. A receiving net provided around the lower part of the handling cylinder is provided.
The handling cylinder is continuous with a scraping portion provided at the front portion of the handling cylinder and scraping the threshed product charged into the handling chamber toward the rear portion of the handling cylinder, and a rear portion of the scraping portion. It is provided in a state, and is provided with a handling processing unit for handling and processing the threshed material from the scraping unit.
The scraping portion includes a base portion and a spiral blade that is raised from the outer peripheral portion of the base portion toward the outside in the radial direction of the handling cylinder and scrapes the threshed product toward the rear portion of the handling cylinder. Be prepared,
The base portion is a harvester having a constant outer diameter from the front end portion to the rear end portion of the scraping portion and having a cylindrical shape centered on the axis of the handling cylinder. The harvester according to claim 1, wherein the corner portion of the spiral blade on the opposite side to the base portion side of the front end is angular. The harvester according to claim 1 or 2, wherein the rising height of the front end portion of the spiral blade from the outer peripheral portion is higher than the rising height from the outer peripheral portion of a portion other than the front end portion of the spiral blade. The transport device is rotatably provided at the transport end portion of the transport device with the axis in the direction along the lateral width direction of the handling chamber as the center of rotation, and the crop is treated as a threshing product by being driven to rotate. Equipped with a rotating member to be put into the room,
The harvester according to any one of claims 1 to 3, wherein the shaft core is arranged at a position lower than the lower end of the peripheral surface on the handling cylinder side in the receiving net. The transport device is rotatably provided at the transport end portion of the transport device with the axis in the direction along the lateral width direction of the handling chamber as the center of rotation, and the crop is treated as a threshing product by being driven to rotate. Equipped with a rotating member to be put into the room,
The harvester according to any one of claims 1 to 4, wherein the shaft core is arranged at a position lower than the lower end portion of the spiral blade. The front part of the receiving net is extended to just below the rear part of the scraping part.
The harvester according to any one of claims 1 to 5, wherein the rear portion of the scraping portion and the front portion of the receiving net overlap in the front-rear direction. The handling processing unit is provided in a state of being lined up in the handling cylinder circumferential direction, and has a rod-shaped handling tooth support member in the direction along the handling body shaft core direction and a plurality of locations in the handling body shaft core direction in the handling tooth support member. The harvester according to any one of claims 1 to 6, further comprising a plurality of handling teeth projecting outward in the radial direction of the handling barrel.

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