JPH0657133U - Lap machine - Google Patents

Abstract

(57) [Abstract] [Purpose] To prevent rotation around the vertical axis at the time of discharge due to eccentricity of the center of gravity of roll bale. [Structure] A mounting table 4 which is rotatably supported by a machine frame 6 around a vertical axis 5 while rolling a roll bale B in its circumferential direction, and a base 15 which supports the machine frame 6 in a freely expandable manner. In the included lap machine, the machine frame 6 is provided with a locking means 7 for blocking the rotation of the mounting table 4 around the vertical axis 5 when the mounting table 4 is deployed upward and the roll bale B is discharged.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wrap machine for wrapping a load such as a roll bale with a film.

[0002]

[Prior art]

 The present applicant has previously proposed a wrap machine for sealing and storing by wrapping a roll bale with a film as appropriate (Japanese Utility Model Publication No. 4-23605). This wrapping machine has three rollers arranged on a mounting table on which the roll bale is mounted, so that the roll bale can be rolled stably, and at the same time, it can be rotated around its vertical axis from the film supply device. The film to be supplied is appropriately wrapped around a roll bale to prevent the film from falling during wrapping work and to secure good airtightness. The wrapped roll bale is rolled and released in the radial direction when the mounting table is unfolded upward together with the machine frame.

[0003]

[Problems to be solved by the device]

 By the way, a roll bale is formed by a roll bale picking up grass and rice straw collected in a row in order and winding them into a cylindrical shape. Rather, there are variations in their density and capacity. When picking up grass, it is difficult to evenly feed grass and grass to the bale chamber of the roll baler, so the roll bale formed is not necessarily a typical cylindrical shape, and the density distribution is not uniform. Therefore, the center of gravity of an actual roll bale rarely coincides with the center of the outline.

Therefore, the wrapping machine still has a problem in discharging the roll bale from the mounting table after winding the film. That is, when the machine frame is deployed upwards, the center of gravity of the roll bale is eccentric from the vertical axis, and therefore the rotational moment about the vertical axis due to the weight of the roll bale and the eccentric distance acts during the discharging process. Due to this rotation moment, the mounting table slightly rotates while the hydraulic motor, which is the rotation drive mechanism, leaks, and the roll bale rolls out in an inclined state. Therefore, the falling direction and the rotating direction of the roller are different, the peripheral surface of the roll bale and the surface of the roller rub against each other, and the wound film is damaged, the airtightness is not maintained, and high quality feed cannot be obtained. There was a problem. In addition, since the roll bale falls on the field in a tilted state, there is a problem in that the periphery of the roll bale deforms when it lands and the stacking during storage is not stable. Furthermore, as disclosed in the above proposal, in the structure in which the roll bale is discharged while being sandwiched by the rotating arm, the rotating arm does not follow the rotation around the vertical axis. The abutting part of the rotating arm rubs and the film is damaged.

Therefore, in view of the above circumstances, the present invention was devised to provide a lap machine capable of preventing rotation around a vertical axis at the time of ejection due to eccentricity of the center of gravity of a roll bale or the like.

[0006]

[Means for Solving the Problems]

 The present invention has a mounting table that rolls a load such as a roll bale in the circumferential direction thereof and is rotatably supported by a machine frame about a vertical axis, and a base that supports the machine frame in an unfoldable manner. In the lap machine, the machine frame is provided with locking means for preventing rotation of the mounting table around a vertical axis when the loading table is deployed upward and the load is discharged.

It is preferable that the locking means is configured to have a locking maintaining mechanism that operates when the machine frame is separated from the base to maintain the locking. The locking means are a hook pivotally supported by the machine frame and engageable with the end of the mounting table, an actuator for rotating the hook to engage and disengage, and an actuator for deploying the mechanism from the machine frame. Can also be configured to include a drive circuit for driving first. The locking maintenance mechanism is an operating valve that is provided in the middle of the drive circuit and an operating lever that is provided on the operating shaft of the opening / closing valve and opens when the valve comes into contact with the base and closes when the valve is separated. It can be configured with and.

Further, the locking means is a locking shaft which is provided in the machine frame so as to be retractable, and which fits into a locking hole formed in the mounting table to prevent rotation, and a locking shaft which is pivotally supported by the machine frame and abuts on the base. The lever shaft member may be configured so as to be retracted by coming into contact therewith and projecting when the locking shaft is retracted.

The locking means includes a friction brake provided on the machine frame and engaged with the mounting table side, and an operation switch for activating the friction brake when the machine frame separates from the base. Good.

[0010]

[Action]

 With the above structure, the locking means engages with the mounting table when the film is wound by the film and is released by the upward expansion of the mounting table and the machine frame, whereby the center of gravity of the package shifts. Prevents you from trying to rotate around a vertical axis.

By the configuration in which the locking means has the locking maintenance mechanism, the locking is reliably performed. Also, due to the structure in which the locking means is composed of the hook, the actuator and the drive circuit, the drive circuit supplies a driving force to the actuator to rotate the hook so that the mounting table and the machine frame engage with the mounting table before the mounting table and the machine frame are deployed upward. By doing so, rotation about the vertical axis is blocked. Due to the structure in which the locking maintaining mechanism is composed of the opening / closing valve and the operating lever, when the hook engages with the mounting table and the upward deployment is started, the drive circuit is closed and the engaged state of the hook is maintained.

Further, by virtue of the structure in which the locking means is composed of the locking shaft and the lever member, the lever member is rotated when the mounting table and the machine frame are expanded upward and separated from the base to move the locking shaft from the machine frame. Make it stick out. The protruding locking shaft blocks rotation around the vertical axis by fitting in the locking hole of the mounting table.

With the configuration in which the locking means is composed of the friction brake and the operation switch, the friction brake operates when the mounting table and the machine frame are expanded upward and away from the base, and the friction brake causes vertical movement. Prevents rotation around the axis.

[0014]

【Example】

 Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 and 2 show a first embodiment of a wrapping machine according to the present invention, showing a case where a roll bale B is wrapped on a field F. As shown in FIG. This lap machine rotates the mounting table 4 around a vertical axis 5 and a mounting table 4 having three rollers 1, 2 and 3 for mounting the roll bale B and rolling it appropriately in the circumferential direction. It is mainly configured by a machine frame 6 that is supported so that the machine frame 6 is provided with a locking means 7 which is a feature of the present invention.

The mounting table 4 is framed in a rectangular shape in plan view by two side plates 8 extending in parallel and two horizontal members 9 spanned between the side plates, and a horizontal member is provided at the center thereof. A small frame 10 connecting the nine members is provided. Then, on the side plate 8, a first roller 1 axially supported on the side plate end, a second roller 2 extending in parallel with the vertical axis 5 sandwiched therebetween, and above the second roller 2 in parallel. An extended third roller 3 is provided, and the second and third rollers 2 and 3 are swingably supported via a swing plate 11 pivotally supported at the other end of the side plate 8. There is.

The machine frame 6 is configured to have two main frames 12 extending in parallel and a vertical frame 13 standing upright at one end thereof, and a vertical shaft 5 is sandwiched between the main frames 12. The horizontal member 23 is laid over. The machine frame 6 is rotatably supported on a rear end of a base 15 having wheels 14 via a rotary support shaft 16. The main frame 12 is provided with a hydraulic motor (not shown) for giving a rotational drive force for rotating the mounting table 4 around the vertical axis 5, and further a rotational drive system for rotating the rollers 1 ... (Not shown).

The locking means 7 includes a hook 17 formed to be engageable with the end of the mounting table 4, a hook hydraulic cylinder 18 as an actuator for appropriately rotating the hook 17, and a hook hydraulic cylinder 18. It is composed of a hydraulic circuit 19 (see FIG. 4) which is a drive circuit for driving the machine frame 6 before the deployment mechanism. The hook 17 is rotatably supported by the rotation support shaft 16 via the cylindrical body 20, and the tip thereof is bent into an L shape to form a contact surface 21 having a shape along the side surface of the horizontal member 9. There is. A protrusion 22 extending in a direction substantially perpendicular to the hook 17 is attached to the cylindrical body 20. The hydraulic cylinder 18 for hook is pivotally supported at its base end on the lower surface of the bottom plate 24 attached between the horizontal members 23 of the machine frame 6 via a bracket 25, and extends substantially along the bottom plate 24. The tip of the piston rod 26 is pivotally supported by the projecting piece 22. That is, when the hook hydraulic cylinder 18 expands, the protrusion 22 is pushed to rotate the cylinder 20 counterclockwise in FIG. 2, so that the hook 17 is hooked on the horizontal member 9 and the rotation around the vertical axis 5 is restricted. It is designed to be bundled.

As shown in FIG. 4, the hydraulic circuit 19 includes a hydraulic pump 27 that is driven by the PTO shaft of the tractor, a hydraulic cylinder 18 for hooks, and a hydraulic cylinder for a machine frame that is a deployment mechanism for the machine frame 6. And 28 are properly connected. The machine frame hydraulic cylinder 28 is hung between the rear frame 29 of the base 15 and the front part of the main frame 12 of the machine frame 6, and the extension thereof causes the machine frame 6 to be deployed upward. Has been formed. The expansion side hydraulic pressure supply ports 30 and 31 and the degeneration side hydraulic pressure supply ports 32 and 33 of the hydraulic cylinders 18 and 28 are connected by hydraulic pipes 34 and 35, respectively, and the expansion side hydraulic pressure supply passage 36 and the degeneration side hydraulic pressure are respectively connected. In addition to being formed as the supply path 37, a switching valve 38 for switching to a state in which the hydraulic pressure of the hydraulic pump 27 is supplied to one of them and to be returned from the other and a state in which the supply is stopped is provided.

An opening / closing valve 39 serving as a lock maintaining mechanism is provided in the middle of the hydraulic pipe 34 of the extension hydraulic pressure supply port 30 of the hook hydraulic cylinder 18. As shown in FIG. 3, the on-off valve 39 is supported by a fixed plate 40 attached to the bottom plate 24 of the machine frame 6, and connection ports 41 and 42 for connecting to the hydraulic pipe 34 are formed vertically. Further, an L-shaped actuating lever 44 is attached to the operation shaft 43. One long rod 45 of the operating lever 44 extends toward the rear frame 29 side of the base 15, and the other short rod 46 is connected to a rod 47 provided on the fixing plate 40. The rod 47 is loosely fitted in a hole formed in the side portion 48 of the fixed plate 40, and is urged by the compression spring 49 in the counterclockwise direction which is the closing direction of the opening / closing valve 39. That is, when the machine frame 6 is mounted on the base 15, the long rod 45 contacts the corner of the rear frame 29 to open the passage of the hydraulic pipe 34, and when the machine frame 6 is deployed upward, the long rod is opened. When 45 is separated from the rear frame 29, it is rotated counterclockwise in the figure by the urging force of the compression spring 49 to close the hydraulic pipe 34.

In addition, in the present embodiment, the rotating arm 50 for sandwiching the roll bale B between the mounting table 4 and the vertical frame 13 of the machine frame 6 is vertically rotatable. The contact portion 51 is provided and has a length that reaches above the mounting table 4 and is appropriately curved so as to follow the curved surface on the circumferential side of the bail B. A rotary arm hydraulic cylinder 52 is provided between the base end of the rotary arm 50 and the vertical frame 13, and the rotary arm 50 is pivoted downward or upward by extension and contraction thereof. There is.

A film feeding device 53 for supplying a film is provided on the base 15, and is held at a height corresponding to the roll bale B mounted on the mounting table 4. Further, a connecting member 54 for connecting with a three-point link of the tractor is provided at the front end of the base 15.

Next, the operation of this embodiment will be described.

When wrapping the roll bale B placed on the field F by the lap machine attached to the tractor, first the rotary arm 50 is set up by retracting the rotary arm hydraulic cylinder 52. After moving the base 15 by the tractor to bring the rear part thereof closer to the roll bale B, the switching valve 38 is operated to supply the hydraulic pressure to the extension side hydraulic pressure supply passage 36. By this supply, first, the hydraulic cylinder 18 for the hook, which requires less force to rotate, extends first, the hook 17 rotates, and the contact surface 21 thereof contacts the side surface of the horizontal member 9 of the mounting table 4. , The movement about the vertical axis 5 is restricted (two-dot chain line in FIG. 2). Then, the machine frame hydraulic cylinder 28 is extended, and as shown in FIGS. 5 and 6, the machine frame 6 is expanded so as to stand up together with the mounting table 4.

When the expansion is started, the long rod 45 of the operating lever 44 of the opening / closing valve 39 is separated from the rear frame 29 of the base 15 so that the operating shaft 43 is rotated and the opening / closing valve 39 is closed. To substantially fix the hook 17.

Next, when the rotary arm hydraulic cylinder 52 is extended, the rotary arm 50 descends, and the roll bale B is sandwiched between the roll bail B and the first roller 1. In this state, when the machine frame hydraulic cylinder 28 is retracted by operating the switching valve 38, the machine frame 6 is lowered and the roll bale B is moved to the first roller 1 and the second and third rolls as shown in FIG. It is set on the mounting table 4 while being supported by the rollers 2 and 3. The lowering of the machine frame 6 causes the long rod 45 of the operating lever 44 of the opening / closing valve 44 to abut the rear frame 29 of the base 15, rotating the operating shaft 43 clockwise to open the oil passage of the hydraulic pipe 34. . With this, the oil on the extension side of the hook hydraulic cylinder 18 is returned to the hydraulic pump 27 side, and the oil is supplied to the contraction side, and the hook 17 is rotated in the opposite direction to engage with the horizontal member 9. Is removed.

Then, the hydraulic cylinder 52 for the rotating arm is retracted to position the rotating arm 50 upward, and then the film is pulled out from the film feeding device 53, and its end is fixed to the roll bale B. Here, when hydraulic pressure is supplied to the hydraulic motor of the drive system to start rotation, the mounting table 4 rotates about the vertical axis 5. At the same time as this rotation, the rollers 1 ... 3 rotate at a predetermined rotation speed. Further, by rotating the roll bale B about the vertical axis 5, the film is delivered from the film delivery device 53 in synchronization. As a result, the roll bale B is rotated about the vertical axis 5 by the mounting table 4 and is rolled by the rotation of the rollers 1 ... At this time, the roll bale B is supported substantially evenly before and after the mounting table 4, but especially the second and third rollers 2 and 3 follow the outer peripheral surface of the bail B. It is rocked appropriately. That is, the second and third rollers 2 and 3 are always in pressure contact with the outer circumference of the roll bale B, and the rolling force is evenly applied to the roll bale B at three points. As a result, the rolling of the roll bale B becomes constant, and the film is wrapped around the roll bale B while being appropriately polymerized.

After the wrapping is completed, the film is cut between the roll bale B and the film feeding device 53. Then, the rotary arm hydraulic cylinder 52 is extended to lower the rotary arm 50, and the contact portion 51 thereof is brought into contact with the roll bale B to be clamped on the mounting table 4. In this state, the switching valve 38 is operated to supply the hydraulic pressure to the extension side hydraulic pressure supply passage 36 to extend the hook hydraulic cylinder 18 and the machine frame hydraulic cylinder 28, respectively, to extend the hook 17. The machine frame 6 and the mounting table 4 are unfolded upward after being hung on the horizontal member 9, and the hydraulic cylinder 52 for the rotating arm is retracted so that the wrapped roll bale B is transferred from the mounting table 4. Place on field F.

As described above, the hook 17 that is rotated by the hook hydraulic cylinder 18 is provided on the machine frame 6, and when the mounting table 4 is deployed upward and the roll bale B is picked up from the field F and the wrapped roll bale. When B is discharged, the hook 17 is engaged with the horizontal member 9 of the mounting table 4 to prevent the machine frame 6 from rotating around the vertical axis 5, so that the roll bale is unfolded when the machine frame 6 is deployed. The rotational moment due to the eccentricity of the center of gravity of B does not occur. That is, the roll bale B does not roll over in the radial direction at the time of discharging and is not excessively rubbed against the rollers 1 ... 3 and the rotating arm 50, the film is prevented from being damaged, and the quality of the roll bale B can be maintained.

Further, in the present embodiment, since the opening / closing valve 39 is provided in the hydraulic circuit 19 for driving the hydraulic cylinders 18, 28, when the machine frame 6 is lowered in the picking up process, it is further affected by an external force or the like. The engagement of the hook 17 can be maintained even when the hook hydraulic cylinder 18 or the switching valve 38 is operated, and an unexpected situation can be avoided.

In the hydraulic circuit 19 of this embodiment, the two hydraulic cylinders 18 and 28 are appropriately connected to operate the expansion side hydraulic pressure supply passage 36 and the degeneration side hydraulic pressure supply passage 37 by a single switching valve 38. However, a switching valve for expanding / contracting the machine frame hydraulic cylinder 28 and a switching valve for expanding / contracting the hook hydraulic cylinder 18 may be separately provided and operated, and the operation levers of the switching valves are interlocked. You may allow it. In addition to the hydraulic cylinders 18 and 28, the actuator may be an electric cylinder or an air cylinder, and a drive circuit may be provided with a power supply circuit or an air supply circuit.

Next, a second embodiment of the present invention will be described with reference to FIG. In this embodiment, as a locking means, a locking shaft 61 that is provided so as to be retractable in the machine frame 6 and a crank-shaped lever member 62 that is pivotally supported by the machine frame 6 and operates the locking shaft 61 appropriately are provided. Has been.

The locking shaft 61 is loosely fitted in a sliding hole 63 formed in the bottom plate 24 of the machine frame 6 so as to be appropriately separated from the vertical axis 5 so as to be vertically movable. The lower plate 64 attached between the horizontal members 9 of the mounting table 4 has a locking hole 65 that is positioned coaxially with the sliding hole 63 in the posture when the mounting table 4 is deployed. When the locking shaft 61 projects upward, the upper end side of the locking shaft 61 is fitted into the locking hole 65. The lever member 62 is pivotally supported below the bottom plate 24 via a bracket 66, one end 67 is connected to the lower end of the locking shaft 61, and the other end 68 is a rear frame of the base 15. It extends to the 29 side. A tension spring 69, one end of which is supported by the horizontal member 23 of the machine frame 15, is attached in the middle of the other end 68 so as to urge the locking shaft 61 in the protruding direction.

Therefore, when the mounting table 4 and the machine frame 6 which are in the posture of performing the lapping work are mounted on the base 15, the other end 68 of the lever member 62 contacts the rear frame 29 and the locking shaft 61 is retracted. Then, the mounting table 4 can be freely rotated around the vertical axis 5. Then, when the mounting table 4 and the machine frame 6 are deployed and the other end 68 of the lever member 62 is separated from the rear frame 29 when releasing the roll bale B, the counterclockwise movement in the figure is caused by the urging force of the tension spring 69. The lever member 62 rotates around, and the locking shaft 61 is projected to prevent rotation of the mounting table 4 around the vertical axis 5.

In this embodiment, since the engagement of the locking shaft 61 is performed after the machine frame 6 is separated from the base 15 by a predetermined distance, the complete restraint of the mounting table 4 may be slightly delayed from the start of deployment. The unfolded period is in a range where the deployment angle is small, the rotational moment generated is extremely small, and the mounting table 4 does not cause harmful rotation.

Further, the present embodiment has a simple structure and is excellent in versatility since there is no addition of the hook hydraulic cylinder and the hydraulic circuit as in the first embodiment. The other constructions and effects are similar to those of the first embodiment.

Next, a third embodiment of the present invention will be described with reference to FIG. The locking means of this embodiment comprises an electromagnetic friction brake 301 provided on the machine frame 6 and an operation switch 303 for activating the friction brake 301. The friction brake 301 is fixed to the horizontal member 23 via a bracket 302, and a shoe 308 with a pad that opens and closes is formed on the upper portion thereof. The shoe 308 elastically sandwiches an annular plate 307 mounted concentrically with the vertical axis 5 on the lower plate 64 on the mounting table side. The operation switch 303 is attached to the horizontal member 23 via a bracket 306, and is turned on and off by the rotation of the sensing lever 304. The sensing lever 304 extends obliquely downward and is urged clockwise in the figure, which is the ON side, and in the wrapping work position, the tip roller 305 comes into contact with the rear frame 29 of the base 15 to the OFF side. Is held.

Therefore, when the machine frame 6 is unfolded upward around the support shaft 16 and separated from the base 15, the sensing lever 304 of the operation switch 303 rotates clockwise in the figure to be turned on, and the friction break 301 Shoe 308 operates in the closing direction to clamp the annular plate 307. This prevents rotation of the mounting table 4. The other constructions and effects are similar to those of the first and second embodiments.

The operation switch 303 may be powered by the power source of the towing vehicle, or a battery may be mounted on the lap machine. Further, as the friction brake, mechanical type, hydraulic type or the like may be used as well as the electromagnetic type.

In the above embodiments, the wrapping machine is shown as being applied to the closed packaging of the roll bale, but the present invention is not limited to this, and the film is wound around the load body whose center of gravity is displaced. Is widely applied to.

[0041]

[Effect of device]

 In short, according to the present invention, the following excellent effects are exhibited.

(1) According to the configuration of claim 1, by preventing the rotation around the vertical axis at the time of discharge due to the eccentricity of the center of gravity of the load body, the wound film is prevented from being damaged, and the load is prevented. You can maintain the quality of your body.

(2) According to the configuration of the second aspect, it is possible to reliably maintain the locking of the locking means and prevent the locking means from being unlocked by an external force or the like during deployment.

(3) According to the configurations of claims 3 and 4, the hook can be engaged before the mounting table starts to be deployed, and the rotation prevention about the vertical axis is reliably achieved.

(4) According to the configuration of the fifth or sixth aspect, it is possible to prevent the rotation of the mounting table that is developed with a simple structure about the vertical axis.

[Brief description of drawings]

FIG. 1 is a side view showing a first embodiment of a lap machine according to the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is an enlarged side view showing another main part of FIG.

FIG. 4 is a hydraulic circuit diagram for explaining a drive system of the locking means of FIG.

5 is a side view for explaining the operation of FIG. 1. FIG.

FIG. 6 is a side view for explaining the operation of FIG.

FIG. 7 is a side view of an essential part showing a second embodiment of the present invention.

FIG. 8 is a side view of an essential part showing a third embodiment of the present invention.

[Explanation of symbols]

 4 Mounting table 5 Vertical axis (vertical axis) 6 Machine frame 7 Locking means 15 Base 17 Hook 18 Hydraulic cylinder for hook (actuator) 19 Hydraulic circuit (drive circuit) 39 Open / close valve (locking maintenance mechanism) 44 Actuating lever (Locking maintenance mechanism) 61 Locking shaft 62 Lever member 65 Locking hole B Roll bale (Packing body)

Claims (6)

[Scope of utility model registration request] 1. A mounting table that rolls a load such as a roll bale in the circumferential direction thereof and is rotatably supported by a machine frame about a vertical axis, and a base that supports the machine frame so that the machine frame can be unfolded. A lap machine having the above-mentioned machine frame, wherein the machine frame is provided with locking means for preventing rotation of the mounting table around the vertical axis when the mounting table is deployed upward to discharge a load. 2. The lap machine according to claim 1, wherein the locking means has a locking maintaining mechanism that operates by the machine frame moving away from the base to maintain the locking. 3. A hook in which the locking means is pivotally supported by the machine frame and is engageable with an end of the mounting table, and an actuator for rotating the hook to engage / disengage. The lap machine according to claim 1 or 2, further comprising: a drive circuit for driving the actuator before the deployment mechanism of the machine frame. 4. The on-off valve provided in the middle of the drive circuit, and the on-off valve opened and separated when the locking maintaining mechanism comes into contact with the base provided on the operating shaft of the on-off valve. The lap machine according to claim 3, further comprising an actuating lever that is sometimes closed. 5. The locking means includes a locking shaft which is provided in the machine frame so as to be retractable and retractable, and which is fitted into a locking hole formed in the mounting table to prevent rotation, and is pivotally supported by the machine frame. The lap machine according to claim 1, further comprising: a lever member that is brought into contact with the base so that the locking shaft is retracted and protrudes when the locking shaft is separated. 6. A friction brake, wherein the locking means is provided on the machine frame and engages with the mounting table, and an operation switch for activating the friction brake when the machine frame is separated from the base. The lap machine according to claim 1, comprising: