JP4560346B2 - Roller packaging material winding device - Google Patents

Description

  The present invention picks up agricultural crops such as grass, wheat straw, and rice straw that have been cut down in the field, forms them into a cylindrical roll bale, and winds a packing material such as a net or sheet around the outer surface of the roll bale. More particularly, the present invention relates to a roll baler packaging material winding apparatus that can always apply an appropriate tension to a wound packaging material.

  Conventionally, in roll balers that pick up agricultural crops such as grass, wheat straw, rice straw etc. that have been cut down in the field and form them into cylindrical roll bales, rolls formed to prevent the collapse of roll bales It is known to wrap a packaging material such as a net or a sheet around the outer surface of the veil. Thus, when winding a packaging material on the outer surface of a roll bale, it is known that good winding cannot be performed unless a tension is applied to the packaging material and a winding operation is performed.

  Moreover, in the roll baler provided with the cutting device which cuts agricultural crops shortly, since the length of the agricultural crops which form a roll bale is short, the part (what is called a shoulder part) where the outer peripheral surface and both end surfaces in a roll bale cross It is easy to lose shape. In such a case, it is preferable to wrap the packaging material so as to cover not only the outer peripheral surface of the roll bale but also a part of both end surfaces, but also in this case, unless tension is applied to the packaging material to be wound, It is known that both end portions of the packaging material cannot enter both end surface sides of the roll bale.

  In view of this, an apparatus has been proposed that applies a braking force to a packaging material roll, which is a supply source of the packaging material, to apply tension to the packaging material.

  For example, as shown in FIG. 17, a packaging material winding device described in Patent Document 1 includes an arm A that is rotatably supported in the vicinity of a packaging material roll NR, and a brake rod provided at the tip of the arm A. B and a spring S that urges the tip end side of the arm A toward the packaging material roll NR, and the braking rod B is pressed against the outer surface of the packaging material roll NR by the urging force of the spring S to give a braking force. . In the figure, RB denotes a molded roll bale, and N denotes a packaging material supplied to the outer surface of the roll bale RB.

US Pat. No. 4,604,848

  However, in such a packaging material winding apparatus, when the winding operation of the packaging material N proceeds and the outer diameter (diameter) of the packaging material roll NR changes, the inclination angle of the arm A changes and the spring S deforms. Since the amount (extension amount) changes, the pressing force of the brake rod B against the packaging material roll NR, that is, the braking force applied to the packaging material roll NR changes. As a result, an appropriate tension may not be applied to the supplied packaging material N.

  More specifically, as the winding operation of the packaging material N progresses, the outer diameter of the packaging material roll NR decreases and the amount of extension of the spring S decreases, so the braking force applied to the packaging material roll NR decreases, and the packaging material N The tension of becomes low. If it becomes like this, the winding material N may not be tightly bound, or winding defects such as the both ends of the packaging material N cannot enter the both end surfaces of the roll bale RB may occur, and the roll bale RB may be deformed when discharged. There is.

  Then, the objective of this invention is providing the packaging material winding apparatus of a roll baler which can always provide suitable tension | tensile_strength to the packaging material wound around the outer surface of a roll bale which solves the said subject.

In order to achieve the above object, the present invention picks up an agricultural harvest such as grass and forms it into a roll bale, and rolls a roll baler packaging material winding device such as a net or sheet around the outer surface of the roll bale. A packaging material roll wound in a roll shape, the packaging material roll supplying the packaging material to the outer surface of the roll bale by rotating itself, and pressing the outer surface of the packaging material roll to rotate the above A tension applying means for applying a braking force to the packaging material roll and thereby applying tension to the packaging material supplied to the outer surface of the roll bale; and a control device for controlling the tension applying means. A brake arm rotatably supported in the vicinity of the packaging material roll, a brake shoe provided on the brake arm, and biasing the brake arm toward the packaging material roll An elastic member for pressing the brake shoe in the outer surface of the packaging material roll Te, and an actuator for adjusting the deformation amount of the elastic member comprises an angle detecting means for detecting the rotational angle of the brake arm, The control device controls the tension applying means in accordance with the outer diameter of the packaging material roll to maintain the tension applied to the packaging material within an appropriate range based on the detection value of the angle detecting means. By controlling the actuator, the pressing force of the brake shoe against the outer surface of the packaging material roll is always maintained within an appropriate range .

  And a feeding roller for feeding the packaging material wound around the packaging material roll toward the outer surface of the roll bale, wherein the feeding roller has an outer diameter at the center in the longitudinal direction outside the both ends in the longitudinal direction. It may be formed larger than the diameter.

  In addition, a guide roller for guiding the packaging material wound around the packaging material roll to the outer surface of the roll bale is provided, and the guide roller has an outer diameter at a central portion in the longitudinal direction that is larger than outer diameters at both ends in the longitudinal direction. It may be formed large.

  In addition, a comb-shaped guide rod having a plurality of rods extending along the supply direction of the packaging material and spaced apart in the width direction of the packaging material between the packaging material roll and the roll bale, The rods of the comb-shaped guide rods may be disposed so as to be inclined from the upstream side toward the downstream side in the packaging material supply direction toward the outer side in the width direction of the packaging material.

  According to the present invention, since the tension of the packaging material can always be maintained within an appropriate range regardless of the outer diameter of the packaging material roll, the packaging material can be wound well around the outer surface of the roll bale, and the roll bale can be deformed. It exhibits an excellent effect that it can be prevented.

  Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

(1) Overall structure of roll baler First, the schematic structure of the roll baler of this embodiment will be described with reference to FIG.

  As shown in the figure, a roll baler 1 according to the present embodiment includes a pick-up device 2 for picking up agricultural crops such as pastures that have been cut down in a field or the like, and a roll bale by compressing the picked-up agricultural crops into a cylindrical shape. And a roll bale forming apparatus 3 for forming the RB. The roll baler 1 of this embodiment includes a coupler 5 for coupling with a tractor (not shown), and is driven by a tractor and travels on a field. The present invention is a self-propelled type having a crawler or the like. It is also applicable to other roll balers. The present invention is also applicable to a roll baler equipped with a cutting device that cuts agricultural crops picked up by the pickup device 2 short.

  Now, the roll bale forming apparatus 3 rotates the rotating machine frame 7, the fixed machine frame 6 attached to the rear part of the coupler 5, the rotating machine frame 7 rotatably connected to the fixed machine frame 6. An actuator (for example, a hydraulic cylinder) 8 for movement is provided, and a compression chamber (roll bale forming chamber) 9 is formed in the internal space of the stationary machine frame 6 and the rotating machine frame 7. A plurality of rotating rollers 10 are arranged in a circular shape in the compression chamber 9, and these rotating rollers 10 are rotationally driven by a driving source such as an engine of a tractor. As described above, the roll bale forming apparatus 3 according to the present embodiment is a type that forms the roll bale RB using the rotary rollers 10 arranged in a circle. However, the present invention is not limited in this respect, and a ladle bar system is used. It can also be applied to a roll baler equipped with a belt type roll bale forming apparatus. Since the pickup device 2 is not related to the characteristic part of the present invention, the description thereof is omitted.

  Agricultural harvests cut down in the field are picked up by the pickup device 2 and introduced into the compression chamber 9, compressed into a cylindrical shape by the rotating rollers 10, and formed into a roll bale RB. When the density of the roll bale RB reaches a predetermined density, a packaging material winding device described below is operated to wind a packaging material such as a net or a sheet around the outer surface of the roll bale RB.

(2) Packaging material winding device Next, the structure of the packaging material winding device of the roll baler 1 of this embodiment will be described with reference to FIGS. 2 to 4 are side views of the packaging material winding device, FIG. 5 is a plan view of the packaging material winding device, FIG. 6 is a plan view of the packaging material winding device and a packaging material cutting device to be described later, and FIG. FIG. 8 is a plan view of a packaging material winding device showing a modification of the comb-shaped guide rod, and FIG. 9 is a diagram of the packaging material winding device and the packaging material cutting device. FIG. 10 is a partially enlarged side view, and FIG. 10 is a plan view of tension applying means described later. 2 to 4 and FIG. 9 are views seen from different side surfaces. That is, in FIG. 2 to FIG. 4 and FIG.

  As shown in FIGS. 2 to 4, the packaging material winding device of the present embodiment is supplied by the packaging material supply means 11 for supplying the packaging material N to the outer surface of the roll bale RB and the packaging material supply means 11. Tension applying means 12 for applying tension to the packaging material N to be provided.

(3) Packaging material supply means 11
First, the structure of the packaging material supply means 11 is demonstrated using FIGS.

  As shown in FIGS. 2 to 4, the packaging material supply means 11 is a packaging rotatably supported by a roll receiver 13 attached to the rear wall of the rotating machine frame 7 of the roll bale forming apparatus 3 (see FIG. 1). The packaging material N is fed out from the material roll NR and supplied between the roll bale RB in the compression chamber 9 and the rotary roller 10 ′. The packaging material roll NR includes a core material S and a packaging material N wound around the outer periphery of the core material S, and supplies the packaging material N to the outer surface of the roll bale RB by rotating itself. be able to.

  The packaging material supply means 11 includes a guide bar 15 fixed in the roll receiver 13, a plurality of (two in the figure) guide rollers 16 and 17 rotatably supported on the upper part of the rotating machine frame 7, and Conveying means 19 for sending the packaging material N guided by the guide rollers 16 and 17 to the compression chamber 9 side, and a comb-shaped guide rod 20 for guiding the packaging material N fed by the conveying means 19 to the outer surface of the roll bale RB (FIG. 5 and FIG. 15).

  As shown in FIG. 5, the guide rollers 16 and 17 of the present embodiment are rollers having a substantially uniform outer diameter (diameter) along the longitudinal direction. However, as shown in FIG. The outer diameter may gradually increase toward the portion, and the outer portion may be formed to have a substantially uniform outer diameter in a predetermined region in the center portion. Thus, by forming the outer diameter of the central portion in the longitudinal direction of the guide rollers 16 and 17 to be larger than the outer diameter of the both ends in the longitudinal direction, the packaging material N guided by the guide rollers 16 and 17 can be Since it can be spread outward in the width direction, both ends of the packaging material N can easily enter the both end faces RBa, RBb of the roll bale RB.

  As shown in FIG. 5, the comb-shaped guide rod 20 is stretched between two bars 21 and 22 spanned on both sides of the rotating machine frame 7, and between the bars 21 and 22. And a rod 23 extending substantially parallel to the direction (arrow A direction). A plurality of rods 23 are arranged in the width direction of the packaging material N at a predetermined interval. The packaging material N guided by the conveying means 19 is guided to the outer surface of the roll bale RB through each rod 23 of the comb-shaped guide rod 20. In addition, as shown in FIG. 8, each rod 23 of the comb-shaped guide rod 20 is inclined and arranged radially from the upstream side in the supply direction of the packaging material N toward the downstream side in the width direction of the packaging material N. You may do it. Thus, by arranging the rod 23 in an inclined manner, the packaging material N that passes over the comb-shaped guide rod 20 is spread outward in the width direction by the rod 23, so that both ends of the packaging material N are made of the roll bale RB. It becomes easy to enter both end faces RBa and RBb. The inclination angle of the rod 23 with respect to the supply direction A of the packaging material N may be arranged in parallel as the same angle in all the rods 23, but as shown in the figure, the one located on the outer side in the width direction of the packaging material N. It is more preferable to enlarge it.

  As shown in FIGS. 2 to 4, the conveying means 19 is rotatably supported by the rotating machine frame 7, and is rotated to the rotating machine frame 7 in the same manner as a drive pulley 25 that is driven to rotate by a driving source such as a tractor engine. The feeding roller 26 is supported freely, and the transmission belt 27 is provided between the driving pulley 25 and the feeding roller 26. The outer peripheral surface of the feeding roller 26 is covered with rubber for increasing the frictional force, and the packaging material N guided by the guide roller 17 is guided on the outer surface of the feeding roller 26. A rotation detection sensor 29 that detects the number of rotations of the feeding roller 26 is provided in the vicinity of the feeding roller 26, and the detected value is input to a control device described later.

  The feeding roller 26 of the present embodiment is formed so that the outer diameter (diameter) of the portion located in the center is slightly larger than the outer diameters of the portions located at both ends when it is divided into three equal parts in the longitudinal direction. Has been. Thus, by forming the outer diameter of the central portion in the longitudinal direction of the feeding roller 26 to be larger than the outer diameters at both ends in the longitudinal direction, the packaging material N fed out by the feeding roller 26 is spread outward in the width direction of the roll bale RB. Therefore, both end portions of the packaging material N can easily enter the both end surface sides of the roll bale RB. It goes without saying that the outer diameter of the feeding roller 26 may be continuously changed (tapered) from the central portion in the longitudinal direction toward both ends.

  As shown in FIGS. 6 and 9, the conveying means 19 further includes a nipping roller 30 for nipping the packaging material N located on the outer surface of the feeding roller 26. The pinching roller 30 is rotatably provided in the middle portion in the longitudinal direction of the plate 32 that is rotatably supported by the rotating machine frame 7 via the support shaft 31.

  In the vicinity of the plate 32, a rod 33 is rotatably supported by the rotating machine frame 7 via a support shaft 35, and the rod 33 and the plate 32 are arranged so as to cross each other substantially perpendicularly. The rod 33 and the support shaft 35 can rotate relative to each other. As shown in FIG. 9, the support member 37 fixed to the side surface of the front end of the plate 32 so as to be orthogonal to the plate 32 (that is, extending to the front side in FIG. 9), and the outer periphery of the rod 33 A biasing means 39 (here, a coil spring) is provided between the stopper 36 and the stopper 36 fitted in a relatively movable manner. The biasing means 39 abuts on the support member 37. Further, a nut 38 for preventing the stopper 36 from coming off is provided at the tip of the rod 33. The plate 32 and the nipping roller 30 are urged clockwise around the support shaft 31 by the urging force of the spring 39, and the nipping roller 30 is pressed against the outer surface of the feeding roller 26. As a result, the packaging material N is held between the holding roller 30 and the feeding roller 26.

  As shown in FIGS. 2 to 4, the conveying means 19 further includes a tension roller 40 for applying tension to the transmission belt 27 described above. The tension roller 40 is rotatably provided at one end (left end portion in the drawing) of a tension arm 42 that is rotatably supported by the rotating machine frame 7 via a support shaft 41. An actuator 43 (here, an electric cylinder) for rotating the tension arm 42 is connected to the right end in the drawing.

  The electric cylinder 43 is controlled by a control device (computer) (not shown). As shown in FIG. 2, when the rod of the electric cylinder 43 is extended to rotate the tension arm 42 counterclockwise, the tension roller 40 presses the transmission belt 27 to apply tension. Thereby, the rotation of the driving pulley 25 is transmitted to the feeding roller 26 via the transmission belt 27.

  On the other hand, as shown in FIG. 3, when the rod of the electric cylinder 43 is retracted and the tension arm 42 is rotated clockwise, the tension roller 40 does not press the transmission belt 27 and the tension of the transmission belt 27 is released. The Accordingly, the rotation of the drive pulley 25 is not transmitted to the feeding roller 26.

(4) Tension applying means 12
Next, the structure of the tension applying means 12 will be described with reference to FIGS.

  The tension applying means 12 applies a braking force to the rotating packaging material roll NR to apply tension to the packaging material N, and rotates on the rotating machine frame 7 via the support shaft 45 above the packaging material roll NR. A brake arm 46 that is freely supported, a brake shoe 47 (a metal or rubber rod or the like is applicable) provided at a free end (left end portion in the figure) of the brake arm 46, and a brake arm 46 Is urged toward the packaging material roll NR (counterclockwise direction) to press the brake shoe 47 against the outer surface of the packaging material roll NR, and the amount of deformation of the spring 49 is adjusted. And an actuator 50 (in this case, an electric cylinder).

  As shown in FIG. 10, the brake arms 46 are provided on both sides of the rotating machine frame 7, and a brake shoe 47 is stretched between the brake arms 46 and 46. As shown in FIGS. 3 and 4, the brake arm 46 basically rotates counterclockwise due to its own weight and the weight of the brake shoe 47, and the brake shoe 47 contacts the outer surface of the packaging material roll NR.

  In this embodiment, the electric cylinder 50 is provided only on one side of the rotating machine frame 7 and is disposed below the brake arm 46 as shown in FIGS. One end of an L-shaped arm 52 rotatably supported on the rotating machine frame 7 via a support shaft 51 is rotatably connected to the tip of the rod of the electric cylinder 50, and the other end of the L-shaped arm 52. One end (lower end) of the rod 53 is rotatably coupled to the rod. The other end of the rod 53 extends upward through a support member 55 having an angular cross section attached to the side surface of the brake arm 46, and can be moved relative to the outer periphery of the rod 53 in the vicinity of the upper end of the rod 53. A fitted first stopper 56 is provided, and a nut 58 for preventing the first stopper 56 from coming off is provided. The spring 49 is interposed between the first stopper 56 and the support member 55. A second stopper 57 is fixed to the rod 53 below the support member 55.

  The electric cylinder 50 is controlled by a control device (not shown). As shown in FIG. 2, when the rod of the electric cylinder 50 is extended and the L-shaped arm 52 is rotated clockwise, the rod 53 is The second stopper 57 comes into contact with the lower surface of the support member 55 and pushes up the support member 55 and the brake arm 46 upward. That is, the extension force of the electric cylinder 50 acts as a force that rotates the brake arm 46 clockwise (the direction in which the brake shoe 47 is separated from the packaging material roll NR).

  On the other hand, as shown in FIGS. 3 and 4, when the rod of the electric cylinder 50 is retracted and the L-shaped arm 52 is rotated counterclockwise, the rod 53 and the first fitted to the rod 53 and the relative movement thereof are provided. The stopper 56 is lowered. In a state where the brake shoe 47 is in contact with the packaging material roll NR, the brake arm 46 cannot be rotated further counterclockwise, so that the spring 49 contracts (deforms) when the first stopper 56 is lowered. That is, the retracting force of the electric cylinder 50 acts as a force for contracting the spring 49. The brake shoe 47 is pressed against the outer surface of the packaging material roll NR by the urging force of the contracted spring 49 and sandwiches the packaging material roll NR with the guide bar 15. As a result, a braking force corresponding to the pressing force of the brake shoe 47 is applied to the packaging material roll NR, and a tension corresponding to the braking force is applied to the packaging material N supplied to the outer surface of the roll bale RB. As described above, the tension applying means 12 of this embodiment can always maintain the tension applied to the packaging material N within an appropriate range by controlling and adjusting the extension amount of the electric cylinder 50.

  The control device is based on detection values of angle detection means 59 that detects the rotation angle (tilt angle) of the brake arm 46 and extension amount detection means (not shown) that detects the actual extension amount of the electric cylinder 50. The electric cylinder 50 is controlled.

  As shown in FIGS. 2 to 4, the angle detection means 59 includes an arm 60 having one end rotatably supported by the rotating machine frame 7, the other end of the arm 60, and a longitudinal intermediate portion of the brake arm 46. A rod 61 to be connected and an angle sensor 62 for detecting a rotation angle (tilt angle) of the arm 60 are provided. That is, the angle detection means 59 of the present embodiment forms a link mechanism with the brake arm 46, the arm 60, the rod 61, and a part of the rotating machine frame 7, and detects the rotation angle of the arm 60 to detect the brake arm. 46 rotational angles are indirectly detected. However, the present invention is not limited in this respect, and the rotation angle of the brake arm 46 may be directly detected.

  Now, as described above, the control device controls the electric cylinder 50 based on the detected value of the angle detection means 59 (more specifically, the angle sensor 62), but the important thing here is that the packaging material roll NR. In other words, the electric cylinder 50 is controlled in accordance with the change in the outer diameter, and the tension acting on the packaging material N is always maintained within an appropriate range. That is, as the winding operation of the packaging material N progresses, the outer diameter of the packaging material roll NR decreases and the brake arm 46 rotates counterclockwise, but the control device responds to changes in the angle of the brake arm 46. By controlling the extension amount of the electric cylinder 50, the braking force that the brake shoe 47 applies to the packaging material roll NR is always maintained within an appropriate range.

  More specifically, the braking force necessary for applying an appropriate tension to the packaging material N and the pressing force of the brake shoe 47 necessary for obtaining the braking force are obtained in advance through experiments, simulations, etc. From the obtained pressing force and the spring constant of the spring 49, the deformation amount (shrinkage amount in the present embodiment) of the spring 49 necessary for obtaining an appropriate pressing force is obtained.

  Then, the extension amount of the electric cylinder 50 necessary for deforming the spring 49 by an appropriate amount is obtained for each rotation angle of the brake arm 46 and input to the control device as an arithmetic expression or a map. The control device determines the target extension amount of the electric cylinder 50 based on the detection value of the angle detection means 59 and their arithmetic expression or map, and the actual extension amount detected by the extension amount detection means matches the target extension amount. Thus, the electric cylinder 50 is feedback-controlled. Thereby, since the deformation amount of the spring 49 is always maintained within an appropriate range (in this embodiment, it is maintained at a substantially constant value), the packaging material roll NR is not affected by the change in the outer diameter of the packaging material roll NR. Is always given an appropriate braking force. Therefore, appropriate tension is always applied to the packaging material N supplied to the outer surface of the roll bale RB. The appropriate tension means that sufficient binding force can be obtained and that both end portions of the packaging material N can sufficiently enter the both end surfaces of the roll bale RB, and the power required for the winding operation is sufficient. The tension is not excessively large.

  According to the roll baler packaging material winding device of the present embodiment, a good winding operation can always be performed regardless of the change in the outer diameter of the packaging material roll NR, so that the roll bale RB is deformed when discharged. There is no.

  Note that the packaging material winding device of the present embodiment includes a warning means (here, a buzzer) (not shown) for notifying the operator when trouble occurs in the packaging material N winding operation.

(5) Packaging Material Cutting Device The roll bale 1 of the present embodiment further includes a packaging material cutting device that automatically cuts the packaging material N at the end of the winding operation of the packaging material N. Hereinafter, the structure will be described with reference to FIGS. 6, 9, and 11 to 16.

  As shown in FIGS. 6, 15, and 16, the packaging material cutting device is attached to the knife holder 63 that is rotatably supported by the rotating machine frame 7 via the support shaft 35, and the tip of the knife holder 63. And a knife 65 (see FIGS. 15 and 16). The knife holder 63 constitutes a link mechanism with the two arms 66 and 67, and is placed on the side of the packaging material N positioned between the feeding roller 26 and the comb-shaped guide rod 20 by a biasing means 69 (here, a coil spring). It is energized. Specifically, the arm 66 is rotatably supported on the rotating machine frame 7 via the support shaft 70, and the tip end portion of the arm 66 and the longitudinal intermediate portion of the knife holder 63 are connected by the arm 67. One end of the spring 69 engages with the support shaft 35, and the other end engages with a support shaft 71 that rotatably connects the arm 66 and the arm 67. The spring 69 is engaged with the support shafts 35 and 71 in an extended state, and urges the knife holder 63 in the clockwise direction in FIGS. 15 and 16.

  On the other hand, as shown in FIGS. 6 and 9, an arm 72 is connected to the end of the support shaft 35 to which the knife holder 63 is connected, and the arm 72 and the knife holder 63 are connected so as not to rotate relative to each other. Yes. A latch 73 is rotatably supported at the lower end of the arm 72 via a pin 75. The latch 73 is normally used (when the cutting operation is not performed), and an upper surface of a stopper 76 fixed to the rotating machine frame 7. Engage with. When the latch 73 is engaged with the stopper 76, the rotation of the arm 72 and the knife holder 63 is prevented, whereby the knife holder 63 is held at a predetermined position facing the urging force of the spring 69 (see FIG. 15). . In FIG. 6, each member is shown expanded for the purpose of clarity, so that the latch 73 and the stopper 76 are shown separated from each other. However, as shown in FIG. 9, the latch 73 and the stopper 76 are shown. Is actually located close to the vertical direction.

  The packaging material cutting device further includes a release mechanism for releasing the engagement between the latch 73 and the stopper 76 when performing the cutting operation.

  As shown in FIGS. 6, 9, and 11 to 14, the release mechanism is rotatably supported by a rod 77 attached eccentrically with respect to the support shaft 26 a of the feeding roller 26 and the rotating machine frame 7. The rotating shaft 79 and an arm 80 having one end rotatably attached to the rod 77 and the other end connected to the rotating shaft 79 via a one-way clutch 82 described later. As shown in FIG. 9, the rotating shaft 79 is disposed below the latch 73, and a corner plate 81 is attached to the rotating shaft 79 so as to be coaxial with the rotating shaft 79 and cannot be relatively rotated. As shown in FIG. 14, a one-way clutch 82 is provided between the arm 80 and the rotating shaft 79 to allow the rotating shaft 79 to rotate only in one direction (counterclockwise direction in FIG. 9). Between the rotary shaft 79 and the rotary shaft 79, there is provided a one-way clutch 83 for preventing reverse rotation of the rotary shaft 79 (clockwise rotation in FIG. 9).

  When the feeding roller 26 rotates, the rod 77 reciprocates and swings the arm 80. Since the rotating shaft 79 and the square plate 81 connected to the rotating shaft 79 are limited to one direction of rotation, when the arm 80 swings, it rotates intermittently in one direction (counterclockwise direction in FIG. 9). When the feeding roller 26 rotates a predetermined number of times and the corner 81a of the square plate 81 is positioned below the latch 73, the corner 81a pushes the latch 73 upward to release the engagement with the stopper 76. Thereby, the rotation of the arm 72 and the knife holder 63 becomes free, and the arm 72 and the knife holder 63 are rotated clockwise by the biasing force of the spring 69 as shown in FIGS. As a result, the knife 65 attached to the knife holder 63 sandwiches the packaging material N with the shear bar 85 fixed to the rotating machine frame 7 and cuts the packaging material N. The amount of eccentricity of the arm 77 with respect to the support shaft 26a of the feeding roller 26, the outer diameter of the square plate 81, and the like are determined by the knife holder 63 and the knife 65 when the packaging material N is wound around the outer surface of the roll bale RB. Set to work.

  Next, a mechanism for returning the knife 65 and knife holder 63 located at the cutting position to the normal position will be described with reference to FIGS. 6 and 11 to 13.

  As shown in the drawing, this mechanism includes an arm 87 rotatably supported on a rotating machine frame 7 via a support shaft 86, and a plate 89 rotatably attached to one end (upper end portion in the figure) of the arm 87. And an actuator 90 (here, an electric cylinder) connected to the other end of the arm 87. A long hole 89a is formed in the plate 89, and the pin 75 attached to the arm 72 described above is inserted into the long hole 89a. The electric cylinder 90 is for rotating the arm 87 and is controlled by a control device.

  In a normal state (before cutting operation), as shown in FIG. 11, the rod of the electric cylinder 90 is retracted and the arm 87 is located at the position most rotated counterclockwise. Further, the pin 75 of the arm 72 is located in the vicinity of the right end of the elongated hole 89a.

  When the engagement between the latch 73 and the stopper 76 is released by the action of the release mechanism described above and the knife holder 63 and the arm 72 are rotated to the cutting position, the pin 75 moves leftward in the elongated hole 89a ( (See FIG. 12).

  When the knife holder 63 and the arm 72 positioned at this cutting position are returned to the normal position, as shown in FIG. 13, the rod of the electric cylinder 90 is extended by the control device and the arm 87 is rotated clockwise. As a result, the plate 89 moves rightward, the left end of the elongated hole 89a engages with the pin 75, the knife holder 63 and the arm 72 are rotated counterclockwise, and returned to the normal position. As a result, the latch 73 at the lower end of the arm 72 is reengaged with the upper surface of the stopper 76, and the knife holder 63 and the arm 72 are held in the normal position (see FIG. 9). When the knife holder 63 and the arm 72 return to the normal position, the proximity switch 91 (see FIG. 11) provided in the vicinity of the arm 87 is turned on.

  When the proximity switch 91 is turned ON, the control device retracts the rod of the electric cylinder 90 this time and returns the arm 87 and the plate 89 to the normal position shown in FIG. When the arm 87 and the plate 89 return to the normal position, the proximity switch 92 provided in the vicinity of the arm 87 is turned ON, and the control device stops the degeneration of the electric cylinder 90.

(6) Winding method of packaging material N Next, the winding method of the packaging material N by the packaging material winding apparatus of the roll bale 1 demonstrated above is demonstrated.

  When the density of the roll bale RB formed by the roll bale forming apparatus 3 shown in FIG. 1 reaches a predetermined density, the winding operation by the packaging material winding apparatus is started, but the density of the roll bale RB is predetermined. The determination as to whether or not the density has been reached is automatically made based on, for example, the contact surface gap between the stationary machine frame 6 and the rotating machine frame 7 caused by the increase in the outer diameter of the roll bale RB. When it is detected that the roll bale RB has a predetermined density, a buzzer (not shown) is activated to notify the operator. When the operator confirms the buzzer sound, the operator stops the tractor and stops the supply of the agricultural harvest to the compression chamber 9.

  Next, the operator turns on a drive switch (not shown) of the feeding roller 26. Then, as shown in FIG. 2, the control device extends the electric cylinder 43 and presses the tension roller 40 against the transmission belt 27 to apply tension to the transmission belt 27. As a result, the rotation of the drive pulley 25 is transmitted to the feeding roller 26, and the feeding of the packaging material N previously inserted between the feeding roller 26 and the holding roller 30 (see FIG. 9 and the like) is started.

  At this time, the control device simultaneously extends the electric cylinder 43 and also extends the electric cylinder 50 of the tension applying means 12 to lift the brake arm 46 and separate the brake shoe 47 from the packaging material roll NR (see FIG. 2). This is because slipping or the like may occur and smooth feeding may not be possible if a braking force is applied to the packaging material roll NR at the start of feeding of the packaging material N.

  If the rotation detecting sensor 29 detects that the feeding roller 26 has rotated a predetermined number of revolutions, the control device retracts the electric cylinder 43 and the tension applied to the transmission belt 27 by the tension roller 40 as shown in FIG. Release the grant. Accordingly, transmission of the driving force to the feeding roller 26 is cut off. In this state, the packaging material N is sandwiched between the outer surface of the roll bale RB and the rotating roller 10 ′, and the packaging material N is fed out by the rotation of the roll bale RB, so the driving of the feeding roller 26 is stopped. Even then, the delivery of the packaging material N is continued.

  The control device stops driving the feeding roller 26 and simultaneously retracts the electric cylinder 50 of the tension applying means 12 to press the brake shoe 47 against the outer surface of the packaging material roll NR to apply a braking force (see FIG. 3). Thereby, tension | tensile_strength is provided to the packaging material N supplied to the outer surface of roll bale RB.

  As described above, during the winding operation of the packaging material N, the detection value of the angle sensor 62 is input to the control device, and the control device detects the detection value and the actual extension amount of the electric cylinder 50. Based on the detected value of the means (not shown), the extension amount of the electric cylinder 50 is always controlled to an appropriate value (see FIGS. 3 and 4). Thus, during the winding operation, an appropriate braking force is always applied to the packaging material roll NR, and an appropriate tension is always applied to the packaging material N. In the present embodiment, the braking force and the tension are maintained at substantially constant values during the winding operation.

  On the other hand, the cornered plate 81 shown in FIG. 9 intermittently rotates counterclockwise as the feeding roller 26 rotates. Immediately before the corner 81a of the corner plate 81 is positioned below the latch 73, the controller temporarily extends the electric cylinder 50 of the tension applying means 12 to temporarily apply the braking force to the packaging material roll NR by the brake shoe 47. After that, the electric cylinder 50 is retracted again and the brake shoe 47 is pressed against the packaging material roll NR.

  When the feeding roller 26 further rotates and the corner 81a of the corner plate 81 pushes up the latch 73, the engagement between the latch 73 and the stopper 76 is released, and the knife holder 63 is moved to the spring as shown in FIG. The knife 65 is rotated clockwise by the urging force of 69 and the packaging material N is cut.

  The reason for once releasing the braking force on the packaging material roll NR before cutting the packaging material N is that if the cutting is carried out while maintaining the tension at the time of feeding, the tension is too strong and the packaging material N is fed with the feeding roller 26 and the nipping roller. This is because the operation of inserting the packaging material N between these rollers 26 and 30 is necessary before the next winding operation.

  When the cutting work is finished, the buzzer is activated to notify the worker that the winding work is finished. Thereafter, when the operator retracts the actuator 8 via an operation lever (not shown) or the like, the rotating machine frame 7 rotates upward, and the roll bale RB around which the packaging material N is wound is discharged outside the apparatus. . Thereafter, the operator extends the actuator 8 via an operation lever or the like (not shown), whereby the rotating machine frame 7 is rotated downward and the compression chamber 9 is closed.

  Thereafter, as shown in FIG. 13, the control device extends the electric cylinder 90 to return the arm 72 and the knife holder 63 to the normal position. If it is confirmed by the proximity switch 91 that the knife holder 63 or the like has returned to the normal position, the controller degenerates the electric cylinder 90. When it is confirmed by the proximity switch 92 that the arm 87 and the plate 89 have returned to the normal position, the electric cylinder 90 is degenerated (see FIG. 11).

  When the series of operations described above are completed, the operator starts the next roll bale RB molding operation by running the tractor again.

  According to the roll baler packaging material winding device of the present embodiment, the tension of the packaging material N can always be maintained within an appropriate range regardless of changes in the outer diameter of the packaging material roll NR. Is obtained, and both ends of the packaging material N can sufficiently enter the both end surfaces of the roll bale RB, so that the roll bale is not deformed.

  The embodiment described above is shown as an example of the present invention, and does not limit the present invention.

  For example, in the above embodiment, a coil spring is used as each biasing means, but the present invention is not limited in this respect, and various other elastic members such as a disc spring and rubber can be applied as the biasing means.

  In the above embodiment, while the winding operation is performed, the deformation amount of the spring 49, the braking force applied to the packaging material roll NR, and the tension applied to the packaging material N are maintained at substantially constant values. It is not limited in this point, You may change these each value within the suitable range according to the outer diameter of the packaging material roll NR.

  In the above embodiment, the electric cylinder 50, the L-shaped arm 52, the rod 53, the spring 49, etc. in the tension applying means are provided only on one side of the rotating machine frame 7, but may be provided on both sides.

  In the above-described embodiment, the brake shoe 47 is pressed against the packaging material roll NR by contracting the spring 49 of the tension applying unit 12. However, the spring 49 may be extended and pressed.

  Moreover, although the electric cylinder was used as each actuator in the said embodiment, this invention is not limited in this point, Various other apparatuses, such as a hydraulic cylinder, are applicable as an actuator.

It is a side view of the roll baler which concerns on one Embodiment of this invention. It is a side view of the packaging material winding apparatus of the roll baler of FIG. It is a side view of the packaging material winding apparatus of the roll baler of FIG. It is a side view of the packaging material winding apparatus of the roll baler of FIG. It is a top view of the packaging material winding apparatus of the roll baler of FIG. It is a top view of the packaging material winding apparatus and packaging material cutting device of the roll baler of FIG. It is a top view of the packaging material winding apparatus which shows the modification of a guide roller. It is a top view of the packaging material winding apparatus which shows the modification of a comb-shaped guide rod. It is the elements on larger scale of the packaging material winding apparatus and packaging material cutting device of the roll baler of FIG. It is a top view of the tension | tensile_strength provision means of the roll baler of FIG. It is a side view of the packaging material winding apparatus and packaging material cutting apparatus of the roll baler of FIG. It is a side view of the packaging material winding apparatus and packaging material cutting apparatus of the roll baler of FIG. It is a side view of the packaging material winding apparatus and packaging material cutting apparatus of the roll baler of FIG. It is a partial expansion front view of a packaging material cutting device. It is a side view of a packaging material cutting device. It is a side view of a packaging material cutting device. It is a side view of the packaging material winding apparatus of the conventional roll baler.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Roll baler 3 Roll bale forming apparatus 11 Packaging material supply means 12 Tension applying means 15 Comb guide rod 16 Guide roller 17 Guide roller 23 Rod 26 Feeding roller 46 Brake arm 47 Brake shoe 49 Biasing means (coil spring)
50 Actuator (electric cylinder)
59 Angle detection means 62 Angle sensor N Packaging material NR Packaging material roll RB Roll bale

Claims (4)

In a roll baler packaging material winding device that picks up agricultural crops such as grass and forms it into a roll bale, and winds a packaging material such as a net or sheet around the outer surface of the roll bale.
A packaging material roll provided with a packaging material wound in a roll shape and supplying the packaging material to the outer surface of the roll bale by rotating itself, and the packaging material rotating by pressing the outer surface of the packaging material roll A tension applying means for applying a braking force to the roll and thereby applying tension to the packaging material supplied to the outer surface of the roll bale; and a control device for controlling the tension applying means.
The tension applying means includes a brake arm rotatably supported in the vicinity of the packaging material roll, a brake shoe provided on the brake arm, and urges the brake arm toward the packaging material roll side to An elastic member for pressing the shoe against the outer surface of the packaging material roll, and an actuator for adjusting the amount of deformation of the elastic member,
An angle detection means for detecting the rotation angle of the brake arm;
The control device controls the tension applying means in accordance with the outer diameter of the packaging material roll to maintain the tension applied to the packaging material within an appropriate range based on the detection value of the angle detecting means. A roll baler packaging material winding device , wherein an actuator is controlled so that the pressing force of the brake shoe against the outer surface of the packaging material roll is always maintained within an appropriate range . A feeding roller for feeding the packaging material wound around the packaging material roll toward the outer surface of the roll bale;
2. The roll baler packaging material winding device according to claim 1, wherein the feeding roller is formed such that an outer diameter of a central portion in the longitudinal direction is larger than outer diameters of both end portions in the longitudinal direction . A guide roller for guiding the packaging material wound around the packaging material roll to the outer surface of the roll bale;
The roll roller packaging material winding apparatus according to claim 1 or 2 , wherein the guide roller is formed such that an outer diameter of a central portion in the longitudinal direction is larger than an outer diameter of both end portions in the longitudinal direction . A comb-shaped guide rod having a plurality of rods extending along the supply direction of the packaging material between the packaging material roll and the roll veil and spaced in the width direction of the packaging material,
4. The rod according to claim 1, wherein the rod of the comb-shaped guide rod is disposed so as to be inclined from the upstream side in the supply direction of the packaging material toward the downstream side in the width direction of the packaging material . Roller packaging material winding device.

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