JP2020054296A - Roll baler - Google Patents

Abstract

To provide a roll baler which packages a roll bale at a packaging pressure capable of preventing collapse of the roll bale, and can prevent falling and detachment of a packaging material after cutting.SOLUTION: A roll baler A comprises: a molding chamber 6 for molding feed crops B on a roll bale B1; and a delivery unit 7 for delivering a packaging material which packages the roll bail into the molding chamber. The roll baler further comprises: a drive shaft which is connected and restricted so as to rotate in only one direction; a cutting mechanism which is operated to cut the packaging material when the drive shaft is rotated by a prescribed angle; and a brake control part 7e for controlling brake force of a brake part so as to become lower when a rotary angle position of the drive shaft before reaching to a prescribed angle at which the cutting mechanism performs a cutting operation, is detected.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a roll baler for forming chopped feed crops into roll bales.

As described in Patent Literature 1 below, a roll baler packs a packing material (eg, net, twine, wrap film, etc.) for packing a roll bale formed in a forming chamber into which shredded feed crops are charged. It is known to have a delivery device for delivering to a molding chamber.

As the above-mentioned delivery device, there is known a device having a function of controlling the length of a packing material wound around the outer surface of a roll bale as described in Patent Document 2 below, and a variable device described in Patent Document 2 is known. In the diameter roll baler, with respect to roll bales formed with different diameters and different hardnesses for each type of feed crop, the drawing length of the packaging material is adjusted so that the required number of windings is obtained. In the non-variable diameter roll baler, the length of pulling out the packing material can be adjusted so that the required number of windings is obtained.

JP 2015-39364 A Japanese Patent No. 4559226

The delivery device described in Patent Literature 2 sends a packing material pulled out of a roll formed by winding a packing material into a cylindrical shape to a molding chamber by driving rotation of a driving roller while nipping the packing material between a driving roller and a driven roller. After the packing material sent to the molding chamber is wound around the outer periphery of the roll bale, the packing material is wound around the roll bale while being pulled out by the rotation of the roll bale, and the packing material is cut after being wound around the roll bale. Has been.

When pulling out the packing material by rotating the roll bale, rotate it when pulling out the packing material in order to maintain the tension of the packing material to be pulled out and wind the packing material around the roll bale with the necessary packing pressure without loosening. The roll is constantly braked.

However, if the packaging material is cut in a state where tension is generated, the cut packaging material may be pulled by its own tension and fall out between the sandwiched driving roller and driven roller. Was.

If the packing material comes off from between the drive roller and the driven roller, the work of holding the packing material between the drive roller and the driven roller must be performed again, which is a delay in the roll bale forming operation. It becomes a factor.

Due to the above-mentioned problems, there is a need for the development of a roll baler that can prevent the falling off or detachment of the packing material after cutting, while packing at a packing pressure that can prevent the collapse of the roll bale.

  Means adopted by the present invention in order to solve the above-mentioned problem includes a forming chamber for forming a forage crop into a roll bale, and a sending device for sending a packing material for packing the roll bale to the forming chamber. A roll baler provided with a roll support unit that rotatably supports a roll formed by winding the packing material into a cylinder, a braking unit that brakes the rotation of the roll, and a roll baler that is pulled out from the roll. A feeding unit having a rotating roller for supporting the packing material and sending it to a molding chamber; and a swing connected to the rotating roller via an eccentric link mechanism, and swinging repeatedly with the rotation of the roller. An arm, and a drive shaft connected to the swing arm so as to rotate intermittently in the circumferential direction according to the swing angle of the swing arm and to be limited to rotate only in one direction. A cutting mechanism that operates to cut the packing material when the drive shaft rotates by a predetermined angle; and a detected part that is arranged to rotate with the rotation of the drive shaft in a rotation range of the drive shaft. A detection unit arranged to detect the detected portion at a position of the rotation angle of the drive shaft before reaching a predetermined angle at which the cutting mechanism performs a cutting operation; and the detection unit detects the detected portion. And a braking control unit for controlling the braking force of the braking unit to be reduced when the roll baler is operated.

A knife holder on which a knife for cutting the packing material is mounted, a biasing unit for biasing the knife holder in a direction to cut the packaging material, and a biasing force of the biasing unit A stopper for holding the knife holder at a position separated from the packaging material against the packing material, a rotating plate supported so as to rotate coaxially and integrally with the drive shaft, and a radial direction on a periphery of the rotating plate. The knife holder is detached from the stopper by the projection when the rotary plate rotates by a predetermined angle, and the detected part is disposed on the rotary plate. It is preferable that the detection unit is disposed at a position where the detection unit is detected so as to face the detection unit.

It is preferable that the detected part is the protrusion.

It is a side view of a roll baler of an embodiment concerning the present invention. It is an enlarged view which shows the internal structure of a sending part. It is an enlarged view showing a cutting mechanism. It is a (4)-(4) line side view of FIG. FIG. 2 shows a cut state. FIG. 3 shows a cut state. This shows a state in which the state has been returned from the disconnected state to the reset state. It is an enlarged view which shows a detection start state. It is an enlarged view which shows a detection state.

  Hereinafter, a roll baler A according to an embodiment of the present invention will be described with reference to FIGS. The roll baler A exemplified in the present embodiment is a self-propelled harvesting roll baler A that performs from harvesting of the forage crop B to shaping of the roll bale B1 and discharging it to the field. It is not limited to the roll baler A.

  As shown in FIG. 1, the roll baler A has a cockpit 1, a traveling body 2, a harvester 3, a chute 3A, a hopper 4, a transport device 5, a molding chamber 6, a delivery device 7, and an ejector device 8 arranged on a vehicle body A1. Further, an engine (not shown) serving as a driving force of the traveling body 2, the harvester 3, the hopper 4, the transport device 5, the molding chamber 6, and the delivery device 7, and the power of the engine are transmitted from the cockpit 1 , A power transmission system (not shown) for transmitting to the traveling body 2, the harvester 3, the hopper 4, the transport device 5, the forming chamber 6, and the delivery device 7 is provided.

The above-mentioned feed crop B is used for livestock feed such as dent corn and pasture grown in the field.

  Although the basic configuration and operation of the roll baler A are the same as those of the roll baler described in Patent Document 1, detailed description is omitted. The forage crop B in the field G is cut and chopped by the machine 3, and the chopped forage crop B is put into the hopper 4 via the shoot 3A, and the forage crop falling from the hopper 4 is provided in the transport device 5. It is put into the molding chamber 6 by the transport conveyor (not shown).

  The feed crop B put into the molding room 6 is formed into a cylindrical roll bale B1 by the molding device 6A of the molding room 6, and the roll bale B1 is packed by the packing material B2 sent from the sending device 7 to the molding room 6. After that, the movable half 61 of the molding chamber 6 is opened and discharged from the fixed half 60, and the discharged roll bale B1 is discharged to the field G via the ejector device 8.

As shown in FIG. 2 to FIG. 7, the delivery device 7 includes a roll support portion 7a that rotatably supports a roll B3 formed by winding a packing material B2 in a cylindrical shape, and a braking portion 7b that brakes the rotation of the roll B3. A delivery unit 7c for delivering the packing material B2 from the roll B3 to the forming chamber 6 while pulling the packing material B2, a cutting mechanism 7d for cutting the packing material B2 after the packing into the roll bale B1, and a brake for controlling the braking of the braking unit 7b. And a control unit 7e.

The roll support portion 7a rotatably supports the roll B3 about the axis of the roll B3, and the roll B3 rotates with the packing material B2 pulled out by the sending operation of the sending portion 7c. .

The braking unit 7b brakes the rotation of the roll B3 so that the packing material B2 is pulled out without loosening the packing material B2 when the packing material B2 is pulled out. The part 7e controls so that the braking is released before the packing is completed.

The braking unit 7b includes a contact body 70b that comes into contact with the outer periphery of the roll B3, a brake body 71b that is rotatably supported in a direction that allows the contact body 70b to approach and separate from the outer periphery of the roll B3, and a brake. A cylinder 72b for supporting the main body 71b, and a spring 73b provided on the cylinder 72b urges the contact body 70b against the brake main body 71b in a direction of pressing the contact body 70b against the outer periphery of the roll B3. The extension of the cylinder 72b against the force causes the contact body 70b to rotate in a direction away from the outer periphery of the roll B3 with respect to the brake body 71b.

The brake control unit 7e controls the cylinder 72b such that the contact body 70b separates the brake body 71b from the outer periphery of the roll B3. With this control, braking of the brake body 70b on the roll B3 by the contact body 70b is released. It has been like that.

The basic configuration and operation of the sending section 7c are the same as those of the roll baler described in Patent Document 2 described above, and thus a detailed description thereof will be omitted. However, by rotating while holding the packing material B2, the packing material B2 is rotated. Roller 70c and a driven roller 71c that send the packing material B2, and an idler roller 72c that holds a sending path of the packing material B2 drawn out from the roll B3 when the packing material B2 is sent.

The roll B3, the driving roller 70c, the driven roller 71c, and the idler roller 72c all have axes parallel to the axis of the roll bale B1, and rotate the packing material B2 around the axis to rotate the packing material B2 into the molding chamber 6. And can be wound around the roll bale B1.

After the packing material B2 sent to the molding chamber 6 is wound around the outer periphery of the roll bale B1, the driving rotation of the drive roller 70c is stopped, and the rotation of the roll bale B1 causes the packing material B2 to be pulled out. The driving roller 70c and the driven roller 71c are rotated by the contact friction of the packing material B2 with the driving roller 70c and the driven roller 71c.

The basic configuration and operation of the cutting mechanism 7d are the same as those of the roll baler described in Patent Document 2 described above, and thus a detailed description thereof will be omitted. A swing arm 71d that is connected and swings repeatedly with the rotation of the drive roller 70c, and that rotates intermittently in the circumferential direction with respect to the swing arm 71d according to the swing angle of the swing arm 71d. A driving shaft 72d, a one-way clutch 73d for restricting the rotation of the driving shaft 72d so as to rotate only in one direction, and a rotating plate 74d supported coaxially and integrally with the driving shaft 72d. It has a projection 75d protruding radially from the periphery of the rotating plate 74d and a knife 76d for cutting the packaging material B2, and is separated from the packaging material B2 in the cutting direction and the packaging material B2. The knife holder 77d, which is rotatably supported in the direction shown in FIG. 7, is attached to the knife holder 77d, a spring (biasing portion) 770d for biasing the knife holder 77d in a direction of cutting the packaging material B2, and the knife holder 77d integrally. The holding arm 78d, which is rotatably supported by the same support shaft 771d, comes into contact with the knife arm 77d at a position (reset position R) in which the knife holder 77d is separated from the packing material B2 against the urging force of the spring 770d. Accordingly, a stopper 79d for holding the knife holder 77d at the reset position R is provided.

That is, the rotation of the drive roller 70c when the packing material B2 is being sent out and pulled out is converted as the swing of the swing arm 71d via the eccentric link mechanism 70d, and is changed according to the swing angle of the swing arm 71d. As a result, the drive shaft 72d rotates intermittently in the circumferential direction, and the rotating plate 74d rotates with the rotation of the drive shaft 72d.

Then, when the rotation of the intermittently rotating drive shaft 72d reaches a predetermined angle (360 ° in this embodiment), the projection 75d comes into contact with the holding arm 78d and is separated from the holding arm 78d. The knife holder 77d is rotated by the biasing force of the spring 770d in a direction in which the packaging material B2 is cut, whereby the packaging material B2 is cut.

Reference numeral 100 denotes a reset link for returning the knife holder 77d rotated in the cutting direction to the reset position R. The reset link is disposed so as to extend over the movable half 61 and the holding arm 78d, and is used to discharge the roll bale B1. The holding arm 78d is rotated toward the reset position R with the movable half 61 that rotates in a direction to open the fixed half 60 (see FIG. 7).

Reference numeral 101 denotes an adjusting hole for adjusting the pull-out length of the packing material B2, and a plurality of adjusting holes are provided along the length direction of the swing arm 71d. By changing the swing angle of 71d, the length of pulling out the packing material B2 can be adjusted, and the number of turns of the packing material B2 around the roll bale B1 can be changed.

The braking control unit 7e releases the braking of the braking unit 7b when the detecting unit 70e detects the protrusion (detected portion) 75d of the rotating plate 74d as shown in FIGS. 2, 5, 8, and 9. The control is performed as follows.

As shown in FIG. 1, it is built in a control box (not shown) of the cockpit 1, and various settings are performed by operation from the control box.

The detection unit 70e determines that the rotation angle of the rotation plate 74d that rotates integrally with the drive shaft 72d in the rotation range is 5/6 of the predetermined angle (360 °) at which the cutting mechanism 7d cuts the packing material B2. The projection 75d is located at a position where the projection 75d can be detected when the operation reaches (see FIGS. 8 and 9).

The detection unit 70e is a contact sensor that detects the protrusion 75d by the contact of the protrusion 75d, but the present invention is not limited to the illustrated contact sensor, and may be a non-contact sensor.

In other words, since the projection 75d of the rotating plate 74d, which is a well-known configuration, is used as the detection target, the present invention can be easily applied to the existing sending device 7, and can be set at a predetermined angle (360 °) at which the cutting mechanism 7d performs the cutting operation. When the detecting unit 70e detects the protrusion 75d at the rotation angle before reaching, the braking control unit 7e can release the braking of the braking unit 7b on the roll B3 based on the detection result.

With respect to the predetermined angle (360 °) of the projection 75d at which the cutting mechanism 7d cuts the packaging material B2, the packaging material B2 pulled out is braked against the roll B3 until the projection 75d reaches a rotation angle of 5/6. As a result, a strong tension is generated, and the sheet is wound around the roll bale B1 with a high packing pressure.

Then, when the protrusion 75d reaches the rotation angle of 5/6, the braking of the braking unit 7b on the roll B3 is released, so that the tension of the pulled out packing material B2 is loosened in the remaining 1/6 range, When the cutting mechanism 7d cuts the packing material B2 at a predetermined angle (360 °), the pulling force due to the tension acting on the cut packing material B2 itself is weakened. Can be prevented from slipping out of the space between them.

In the winding of the packing material B2 in the remaining 1/6 range, the packing pressure is reduced because the tension of the packing material B2 is loosened as described above, but the protrusion 75d has a rotation angle of 5/6. In winding the packing material B2, since most of the packing material B2 is wound with a high packing pressure, there is no problem in preventing collapse of the roll bale B1 after packing.

Further, even if the length of pulling out the packing material B2 is lengthened or shortened, the rotation of the rotating plate 74d causes the protrusion 75d to pass through the detection unit 70e, so that the braking of the braking unit 7b on the roll B3 is released. be able to.

In the present embodiment, the protruding portion 75d protruding from the rotating plate 74d is used as the detected portion. However, in the present invention, the detected portion may be provided at another position of the rotating plate 74d, or the driving shaft 72d may be provided. A detected portion may be provided. In this case, the position of the detecting portion 70e is set according to the position of the detected portion.

In addition, the rotation angle before reaching the predetermined angle (360 °) at which the cutting mechanism 7d performs the cutting operation is not limited to the illustrated rotation angle of 5/6, and a length that can prevent the roll bale B1 after packing from collapsing. Now, any rotation angle that can provide tension to the packing material B2 may be used.

Regarding the control of the braking control unit 7e, the knife holder 77d is returned to the reset position R (the movable half 61 is rotated in a direction to open the fixed half 60) or the movable half 61 is opened. Control may be performed to return the braking unit 7b to the braking state when a state in which the stationary half 60 is rotated in the direction to close the fixed half 60 from the state is detected.

As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and a design change or the like may be made without departing from the gist of the present invention. The present invention is also included in the present invention.

In addition, each of the above-described embodiments can be combined with each other by diverting technologies unless there is a particular contradiction or problem in the purpose, configuration, or the like.

A: Roll baler B: Forage crop
B1: Roll bale B2: Packing material B3: Roll 6: Forming chamber 7: Delivery device 7a: Roll support portion 7b: Brake portion 7c: Delivery portion 7d: Cutting mechanism 7e: Brake control portion 70c: Drive roller 70d: Eccentric link Mechanism 71d: swing arm 72d: drive shaft 73d: one-way clutch 74d: rotating plate 75d: protrusion 76d: knife 77d: knife holder 770d: spring 79d: stopper 70e: detector

Claims (3)

A roll baler comprising a forming chamber for forming a forage crop into a roll bale and a delivery device for delivering a packing material for packing the roll bale to the molding room, wherein the delivery device includes the packing material. A roll support unit that rotatably supports a roll formed in a cylindrical shape, a braking unit that brakes the rotation of the roll, and a rotating roller that supports the packing material extracted from the roll and sends it to a molding chamber. A sending unit, a swing arm connected to the rotating roller via an eccentric link mechanism and swinging repeatedly with the rotation of the rotating roller, and a swing arm of the swing arm with respect to the swing arm. A drive shaft that is intermittently rotated in the circumferential direction according to the swing angle, and is connected so as to be restricted to rotate only in one direction, and the packing material when the drive shaft rotates a predetermined angle. A cutting mechanism that operates to cut, a detected part that is arranged to rotate with the rotation of the drive shaft in a rotation range of the drive shaft, and reaches a predetermined angle at which the cutting mechanism performs a cutting operation. A detecting unit arranged to detect the detected portion at the position of the previous rotation angle of the drive shaft, and reducing the braking force of the braking unit when the detecting unit detects the detected portion. And a braking control unit for controlling the roll baler. A knife holder on which a knife for cutting the packing material is mounted, a biasing unit for biasing the knife holder in a direction to cut the packaging material, and a biasing force of the biasing unit A stopper for holding the knife holder at a position separated from the packaging material against the packing material, a rotating plate supported so as to rotate coaxially and integrally with the drive shaft, and a radial direction on a periphery of the rotating plate. The knife holder is detached from the stopper by the projection when the rotary plate rotates by a predetermined angle, and the detected part is disposed on the rotary plate. The roll baler according to claim 1, wherein the detection unit is disposed at a position where the detection unit is detected so as to face the detection unit. The said detected part is the said protrusion part, The roll baler of Claim 2 characterized by the above-mentioned.

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