JP2598810Y2 - Wrap machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrapping machine for wrapping a load such as a roll bale with a film.

[0002]

2. Description of the Related Art The applicant of the present invention has previously proposed a wrapping machine for wrapping a roll bale with a film and sealing it for storage (Japanese Utility Model Laid-Open No. 23605/1992). This wrapping machine arranges three rollers on the mounting table on which the roll bale is mounted, stably rolls the roll bale, and supplies the roll bale from the film supply device together with rotation around its own vertical axis. The film to be rolled is appropriately wound around a roll bale, so that it can be prevented from dropping during lapping work and good airtightness can be ensured. The wrapped roll bale is rolled in the radial direction and discharged when the mounting table is unfolded together with the machine frame.

[0003]

The roll bale is formed by sequentially picking up the grass, rice straw, and the like on the field where the roll bales are collected in a row and winding them into a cylindrical shape. The state of the pasted grass and the like is not uniform, and the density and capacity vary. When picking up the grass, it is difficult to uniformly supply the grass and the like to the bale chamber of the roll bale. Therefore, the formed roll bale is not always a typical columnar shape, and the density distribution is not uniform. Therefore, the center of gravity of the actual roll bale hardly coincides with the center of the outer shape.

For this reason, the wrapping machine has a problem in releasing the roll bale from the mounting table after winding the film. That is, when the machine frame is deployed upward, since the center of gravity of the roll bale is eccentric from the vertical axis, a rotating moment about the vertical axis due to the weight and the eccentric distance of the roll bale acts in the discharging process. Due to this rotational moment, the mounting table slightly rotates with leakage of the hydraulic motor as the rotary drive mechanism, and the roll bale is rolled out in an inclined state. Therefore, the falling direction is different from the rotating direction of the roller, and the peripheral surface of the roll bale rubs against the surface of the roller, and the wound film is damaged, and the airtightness cannot be maintained, so that high-quality feed cannot be obtained. was there. In addition, since the roll bale falls onto the field in a tilted state, deformation occurs at the periphery when landing, and there is a problem that stacking during storage is not stable. Further, in the configuration in which the release is performed while the roll bale is held by the rotating arm as disclosed in the above proposal,
Since the rotating arm does not follow the rotation about the vertical axis, the peripheral portion of the inclined roll bale rubs against the contact portion of the rotating arm, so that the film is damaged.

In view of the above circumstances, the present invention has been devised in order to provide a wrap machine capable of preventing rotation about a vertical axis at the time of ejection due to eccentricity of the center of gravity of a roll bale or the like.

[0006]

According to the present invention , a machine frame is mounted on a base.
Tiltable and rotatable around its vertical axis on the machine frame
A mounting table is provided, and a load such as a roll bale is placed on the mounting table.
In a lapping machine provided with rollers for rolling in the circumferential direction, the machine frame is mounted on the machine frame while tilting the machine frame with respect to a base.
When unloading the load from the gantry,
A locking means for preventing rotation around the axis is provided .

[0007] It is preferable that the above-mentioned locking means is provided with a locking maintenance mechanism for maintaining the locking by operating when the machine frame is separated from the base. The locking means includes a hook rotatably supported by the machine frame and formed to be engageable with an end of the mounting table, and the hook is rotated to engage and disengage with the end of the mounting table . Actuator and tilt the actuator
And a driving circuit for driving before moving . The locking maintenance mechanism includes an on-off valve provided in the middle of the drive circuit, and an operating lever provided on an operating shaft of the on-off valve, which opens and closes when the valve comes into contact with a base and closes when separated. Can be provided.

The locking means includes a locking shaft which is provided in the machine frame so as to be able to protrude and retract so as to fit into a locking hole formed in the mounting table to prevent rotation, and a locking shaft pivotally supported by the machine frame and supporting the base. And a lever member that projects when the engagement shaft is immersed and separated by contact.

The locking means includes a friction brake provided on the machine frame and engaged with the mounting table, and an operation switch for operating the friction brake when the machine frame is separated from the base. Is also good.

[0010]

With the above arrangement, the locking means engages with the mounting table when the package is released by the upward deployment of the mounting table and the machine frame after the film has been wound thereon, so that the center of gravity of the package is controlled. The deviation prevents any attempt to rotate around the vertical axis.

[0011] With the configuration in which the locking means has the locking maintaining mechanism, the locking is reliably performed. In addition, since the locking means includes a hook, an actuator, and a driving circuit, the driving circuit supplies a driving force to the actuator to rotate the hook and engage the mounting table before the mounting table and the machine frame expand upward. This prevents rotation about the vertical axis. When the hook is engaged with the mounting table and the upward deployment is started, the drive circuit is closed, and the hook is maintained in the engaged state.

[0012] Further, since the locking means comprises a locking shaft and a lever member, the lever member rotates when the mounting table and the machine frame are unfolded upward and separated from the base, thereby moving the locking shaft from the machine frame. Protrude. The protruding locking shaft prevents rotation around the vertical axis by fitting into the locking hole of the mounting table.

[0013] With the construction in which the locking means comprises a friction brake and an operation switch, the friction brake is activated when the mounting table and the machine frame are deployed upward and separated from the base. Hinders rotation.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 and 2 show a first embodiment of a wrapping machine according to the present invention, in which a roll bale B is wrapped on a field F. FIG. This lapping machine has a mounting table 4 having three rollers 1, 2, 3 for mounting a roll bale B and appropriately rolling in the circumferential direction, and rotating the mounting table 4 around a vertical axis 5. Mainly composed of a machine frame 6 which is supported to
A locking means 7 which is a feature of the present invention is provided.

The mounting table 4 includes two side plates 8 extending in parallel.
And two horizontal members 9 bridged between the side plates, a rectangular frame in plan view is provided, and a small frame 10 for connecting the horizontal members 9 is provided at the center thereof. And side plate 8
A first roller 1 pivotally supported at an end of the side plate, a second roller 2 extending in parallel with the vertical axis 5 and a second roller 2 extending in parallel above the second roller 2. And the third and third rollers 2 and 3 are provided with a side plate 8.
Is swingably supported via a swing plate 11 which is pivotally supported at the other end.

The machine casing 6 includes two main frames 12 extending in parallel, and a vertical frame 13 erected at one end thereof, and the vertical shaft 5 is sandwiched between the main frames 12. So that the horizontal member 23 is stretched. The machine frame 6 is supported by a rear end of a base 15 having wheels 14 via a rotation support shaft 16 so as to be freely deployable. The main frame 12 is provided with a hydraulic motor (not shown) for applying a rotational driving force for rotating the mounting table 4 about the vertical axis 5, and a rotational drive system (not shown) for rotating the rollers 1. (Not shown).

The locking means 7 includes a hook 17 formed to be engageable with an end of the mounting table 4 and a hydraulic cylinder 18 for a hook, which is an actuator for rotating the hook 17 as appropriate.
And a hydraulic circuit 19 as a drive circuit for driving the hook hydraulic cylinder 18 prior to the deployment mechanism of the machine frame 6.
(See FIG. 4). The hook 17 is rotatably supported by the rotation support shaft 16 via a cylindrical body 20, and its tip is bent into an L-shape to form a contact surface 21 having a shape along the side surface of the horizontal member 9. I have. A projection 22 extending in a direction substantially perpendicular to the hook 17 is attached to the cylindrical body 20.
The hook hydraulic cylinder 18 has its base end pivotally supported via a bracket 25 on the lower surface of a bottom plate 24 attached between the horizontal members 23 of the machine frame 6, extends substantially along the bottom plate 24, and has its piston The tip of the rod 26 is pivotally supported by the projecting piece 22. That is, when the hook hydraulic cylinder 18 is extended, the protruding piece 22 is pushed to rotate the cylindrical body 20 counterclockwise in FIG. 2, thereby hooking the hook 17 on the horizontal member 9 and restraining the rotation about the vertical axis 5. It has become.

As shown in FIG. 4, the hydraulic circuit 19 includes a hydraulic pump 27 driven by a tractor PTO shaft or the like.
And a hydraulic cylinder for hook 18 and a hydraulic cylinder for machine frame 28 serving as an unfolding mechanism of the machine frame 6 are appropriately connected to each other. The machine frame hydraulic cylinder 28 is bridged between the rear frame 29 of the base 15 and the front portion of the main frame 12 of the machine frame 6, and is formed so as to expand the machine frame 6 by extension thereof. Have been. The extension-side hydraulic supply ports 30 of the hydraulic cylinders 18 and 28,
The hydraulic pressure supply ports 31 and the retraction-side hydraulic supply ports 32 and 33 are connected by hydraulic pipes 34 and 35 to form an extension-side hydraulic supply path 36 and a retraction-side hydraulic supply path 37, respectively. A switching valve 38 for switching between a state in which the hydraulic pressure of 27 is supplied and returned from the other side 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 at the extension side hydraulic supply port 30 of the hook hydraulic cylinder 18. On-off valve 39
As shown in FIG. 3, the connection ports 41, 42 supported by a fixed plate 40 attached to the bottom plate 24 of the machine frame 6 and connected to the hydraulic pipe 34 are formed vertically. An L-shaped operating lever 44 is attached to the operating shaft 43. One long rod 45 of the operating lever 44 extends toward the rear frame 29 of the base 15, and the other short rod 46 is
0 is connected to a rod 47 provided at the center. The rod 47 is loosely fitted in a hole formed in the side portion 48 of the fixed plate 40 and is urged by a compression spring 49 in a counterclockwise direction in which the on-off valve 39 is closed. That is, the machine frame 6 is the base 1
The long rod 45 abuts on the corner of the rear frame 29 when it rests on the top 5 to open the passage of the hydraulic pipe 34, and when the machine frame 6 is deployed upward, the long rod 45 separates from the rear frame 29. Thus, the hydraulic pipe 34 is closed by rotating counterclockwise in the drawing by the urging force of the compression spring 49.

In addition, in the present embodiment, a rotating arm 50 for holding the roll bale B between the mounting table 4 and the roll bale B is provided.
Is provided on the vertical frame 13 of the machine frame 6 so as to be rotatable in the up-down direction and reaches above the mounting table 4.
Is formed so as to have a contact portion 51 which is appropriately curved so as to follow the peripheral curved surface. 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 turned downward or upward by extension and retraction thereof.

The base 15 is provided with a film feeding device 53 for feeding a film, 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 to 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 the wrapping machine mounted on the tractor wraps the roll bale B placed on the field F, the rotary arm 50 is first raised by retracting the hydraulic cylinder 52 for the rotary arm. After the base 15 is moved to move the rear portion thereof close to the roll bale B, the switching valve 38 is operated to supply hydraulic pressure to the extension-side hydraulic supply path 36. By this supply, first, the hydraulic cylinder 18 for the hook, which requires a small force for the rotation, extends first, and the hook 17 rotates, and the contact surface 21
Abuts against the side surface of the horizontal member 9 of the mounting table 4 to restrict its movement around the vertical axis 5 (two-dot chain line in FIG. 2). Then, the machine frame hydraulic cylinder 28 is extended, and FIGS.
As shown in (2), the machine frame 6 is unfolded so as to stand up along with the mounting table 4.

When the deployment is started, the long rod 45 of the operating lever 44 of the on-off valve 39 is moved to the rear frame 29 of the base 15.
The operating shaft 43 is rotated by being separated from the opening, and the opening / closing valve 39 is closed so that the hook 17 is substantially fixed.

Next, when the rotary arm hydraulic cylinder 52 is extended, the rotary arm 50 is lowered, and the roll bale B
Between the first roller 1. In this state, when the machine cylinder 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 rollers as shown in FIG. Are set on the mounting table 4 while being supported by the rollers 2 and 3. As the machine frame 6 descends, the long rod 45 of the operating lever 44 of the on-off valve 44 comes into contact with the rear frame 29 of the base 15 and the operating shaft 4
3 is rotated clockwise to open the oil passage of the hydraulic pipe 34. As a result, the oil on the extension side of the hydraulic cylinder 18 for the hook is returned to the hydraulic pump 27 side and the oil is supplied on the retraction side, and the hook 17 is rotated in the reverse direction to release the engagement with the horizontal member 9. Is done.

Then, after the rotary arm hydraulic cylinder 52 is retracted and the rotary arm 50 is positioned upward, 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 around the vertical axis 5. At the same time as this rotation, each roller 1 ... 3
Rotates at a predetermined rotation speed. Further, by the rotation of the roll bale B about the vertical axis 5, the film is fed from the film feeding device 53 in synchronization. Thus, the roll bale B is rotated around 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 substantially equally supported before and after the mounting table 4.
3 is appropriately rocked so as to follow the outer peripheral surface of the bale B.
That is, the second and third rollers 2 and 3 are always in pressure contact with the outer periphery of the roll bale B, and the rolling power is uniformly applied to the roll bale B at three points. This is roll bale B
Is constant, and the film is wrapped around the outer periphery of the roll bale B while being appropriately polymerized.

When the wrapping is completed, the film is cut between the roll bale B and the film feeding device 53. Then, the rotating arm hydraulic cylinder 52 is extended to lower the rotating arm 50, and the contact portion 51 is brought into contact with the roll bale B and is held on the mounting table 4. In this state, the switching valve 38 is operated to supply hydraulic pressure to the extension-side hydraulic supply path 36 to extend the hook hydraulic cylinder 18 and the machine frame hydraulic cylinder 28, respectively, so that the hook 17 is 9, the machine frame 6 and the mounting table 4 are unfolded upward, the hydraulic cylinder 52 for the rotating arm is retracted, and the wrapped roll bale B is rolled out of the mounting table 4 and placed on the field F. Put.

As described above, the hook 17 which is turned by the hook hydraulic cylinder 18 is provided on the machine frame 6, and the mounting table 4 is provided.
Is unfolded upward and picks up the roll bale B from above the field F and releases the wrapped roll bale B,
The hook 17 is engaged with the horizontal member 9 of the mounting table 4 to
Is prevented from rotating about the vertical axis 5 of the
When the roll bale is deployed, no rotational moment is generated due to the eccentricity of the center of gravity of the roll bale B. That is, the roll bale B rolls in the radial direction at the time of release, and does not excessively rub against the rollers 1 and 3 and the rotating arm 50, thereby preventing damage to the film and contributing to quality preservation of the roll bale B.

In this embodiment, the hydraulic circuit 19 for driving the hydraulic cylinders 18 and 28 is provided with an on-off valve 3.
When the machine frame 6 is lowered in the picking-up process, the hydraulic cylinder 1
The engagement of the hook 17 can be maintained even when the switching valve 8 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 each other so that the extension-side hydraulic supply path 36 and the retraction-side hydraulic supply path 37 are connected to a single switching valve 38.
However, the switching valve for expanding and contracting the machine cylinder hydraulic cylinder 28 and the switching valve for expanding and contracting the hook hydraulic cylinder 18 may be separately provided and operated. The operation lever may be linked. The actuator may be an electric cylinder or an air cylinder in addition to the hydraulic cylinders 18 and 28, and a power supply circuit or an air supply circuit may be provided as a drive circuit.

Next, a second embodiment of the present invention will be described with reference to FIG. In this embodiment, a locking shaft 61 is provided as a locking means so as to be freely protruded and retractable in the machine frame 6, and a crank-shaped lever member 62 pivotally supported by the machine frame 6 and appropriately operating the locking shaft 61 is provided. Have 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 separated from the vertical axis 5 as appropriate. The lower plate 64 attached between the horizontal members 9 of the mounting table 4 has a locking hole 65 positioned coaxially with the sliding hole 63 in a posture when the mounting table 4 is deployed. When the locking shaft 61 protrudes upward, the upper end side thereof is fitted into the locking hole 65. The lever member 62 is connected to the bottom plate 24.
Is supported by a bracket 66 via a bracket 66, one end 67 is connected to the lower end of the locking shaft 61, and the other end 68
Extends toward the rear frame 29 of the base 15. In the middle of the other end 68, a tension spring 69, one end of which is supported by the horizontal member 23 of the machine frame 15, is attached so as to urge the locking shaft 61 in a protruding direction.

Therefore, when the mounting table 4 and the machine frame 6 are in the posture for performing the lapping operation, the other end 68 of the lever member 62 abuts on the rear frame 29 and the locking shaft 61 is retracted. As a result, the mounting table 4 can be freely rotated around the vertical axis 5. When the roll bale B is released, the mounting table 4 and the machine frame 6 are unfolded and the other end 68 of the lever member 62 is opened.
Is separated from the rear frame 29, the tension spring 69
The biasing force causes the lever member 62 to rotate counterclockwise in the drawing, thereby protruding the locking shaft 61 and preventing the mounting table 4 from rotating around the vertical axis 5.

In this embodiment, the engagement of the locking shaft 61 is performed after the machine frame 6 is separated from the base 15 by a predetermined distance, so that the complete restraint of the mounting table 4 is slightly delayed from the start of deployment. During the non-restrained period, the unfolding angle is in a small range, the generated rotational moment is extremely small, and no harmful rotation of the mounting table 4 occurs.

The present embodiment has a simple configuration and does not require the addition of a hydraulic cylinder for hooks or a hydraulic circuit as in the first embodiment, so that it is excellent in versatility. The other configuration and operation and effect are the same as 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 includes an electromagnetic friction brake 301 provided on the machine frame 6 and an operation switch 303 for operating the friction brake 301. The friction brake 301 is attached to the
2, a shoe 308 with a pad is formed on the upper part of the shoe 308 and opens and closes. And this shoe 30
8 elastically sandwiches an annular plate 307 mounted concentrically with the vertical axis 5 on the lower plate 64 serving as the mounting table. The operation switch 303 is attached to the bracket
And turned on by the rotation of the sensing lever 304
-Off operation. The sensing lever 304 extends obliquely downward, and is urged clockwise in the figure to the ON side,
In the lap work posture, the rear frame 29 of the base 15
The leading end roller 305 is in contact with and is held at the OFF side.

Therefore, when the machine frame 6 is expanded upward around the support shaft 16 and separates from the base 15, the sensing lever 304 of the operation switch 303 rotates clockwise in FIG. The shoe 308 moves in the closing direction and the annular plate
307. Thus, the rotation of the mounting table 4 is prevented. The other configuration and operation and effect are the same as those of the first and second embodiments.

The power of the operation switch 303 may be the power of the towing vehicle, or a battery may be mounted on the lap machine. The friction brake may be of a mechanical type, a hydraulic type or the like in addition to the electromagnetic type.

In the above embodiment, the wrapping machine is applied to the closed packaging of the roll bale.
The present invention is not limited to this, but can be widely applied to winding a film around a load whose center of gravity is deviated.

[0041]

[Effects of the Invention] In summary, according to the present invention, the following excellent effects are exhibited.

(1) According to the structure of the first aspect, the rotation of the film around the vertical axis at the time of discharge due to the eccentricity of the center of gravity of the load is prevented, thereby preventing the wound film from being damaged.
The quality of the package can be maintained.

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

(3) According to the third and fourth aspects,
The hook can be engaged before the mounting table starts to deploy, and rotation prevention around the vertical axis is reliably achieved.

(4) According to the configuration of claim 5 or 6,
With the simple structure, it is possible to prevent the mounting table from rotating around the vertical axis.

[Brief description of the drawings]

FIG. 1 is a side view showing a first embodiment of a wrapping 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. 1;

FIG. 4 is a hydraulic circuit diagram for explaining a drive system of a locking unit of FIG. 1;

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

FIG. 6 is a side view for explaining the operation of FIG. 3;

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

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

[Explanation of symbols]

 Reference Signs List 4 Mounting table 5 Vertical axis (vertical axis) 6 Machine frame 7 Locking means 15 Base 17 Hook 18 Hook hydraulic cylinder (actuator) 19 Hydraulic circuit (drive circuit) 39 Opening / closing valve (locking maintenance mechanism) 44 Operating lever (Lock maintenance mechanism) 61 Lock shaft 62 Lever member 65 Lock hole B Roll veil (load)

Claims (6)

(57) [Scope of request for utility model registration] 1. A machine frame is provided on a base so as to be tiltable.
A mounting table is provided rotatable about its vertical axis, and the mounting table
Roller that rolls a load such as a roll bale in the circumferential direction
In the provided lap machine, on the machine frame, the machine frame
Tilting the base with respect to the base to release the load from the mounting table
Lock that prevents rotation of the mounting table around the vertical axis
A wrapping machine comprising means . 2. The lapping machine according to claim 1, wherein said locking means has a locking maintaining mechanism which operates when said machine frame is separated from said base to maintain locking. 3. A hook formed rotatably on the machine frame so as to be engageable with an end of the mounting table, wherein the locking means is rotatable. An actuator that engages with and disengages from the end of the mounting table ; and tilts the actuator with the machine frame.
3. The lapping machine according to claim 1, further comprising a driving circuit for driving the lapping machine prior to the movement . 4. An on-off valve provided in the drive circuit and an on-off valve which is provided on an operating shaft of the on-off valve and opens and separates when contacting the base. The lapping machine according to claim 3, further comprising an operating lever that is sometimes closed. 5. A locking shaft provided in the machine frame so as to be able to protrude and retract so as to fit into a locking hole formed in the mounting table to prevent rotation, and is pivotally supported by the machine frame. The lapping machine according to claim 1, further comprising: a lever member that abuts on the base to protrude when the locking shaft is retracted and separated. 6. A friction brake, wherein said locking means is provided on said machine frame and engages with said mounting table, and an operation switch for activating said friction brake when said machine frame is separated from said base. The lapping machine according to claim 1, further comprising: