JPH10297611A - Film holding and cutting equipment of wrapping machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the film holding and cutting equipment of a wrapping machine which, using a simple mechanism, is easy to operate, is highly efficient, and is also able to accurately and surely perform operation for cutting the roll veil side of the finished end side of a film and for holding the cut bracket side when wrapping work is finished and operation for separating the start end side of the film held when wrapping operation is started. SOLUTION: The film holding and cutting equipment of a wrapping machine is provided on a machine frame 1 with a roll up member which moves along and toward the tip end side of a cut arm (b) when the cut arm (b) falls and rotates. The contacting part with the cut arm (b) of a film (f), which is wound to contact around the cut arm (b) in a standing posture, is pulled up toward the rotating end side of the cut arm (b) and bound in a string form to face a cut bracket (e) and a knife while the cut arm (b) is in operation for shoveling toward the cut bracket (e).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a roll bale formed by winding pastures into a roll shape by a roll baler,
In order to mature the high quality silage, the stretch arm with the film roll loaded on the film bracket is rotated around the roll bale, so that the film is continuously wound around the roll bale while being fed out, and the roll bale is wound. In an air-tight wrapping machine, when the work of winding the film around the peripheral surface of the roll bale is completed, the film fed from the film roll loaded on the film bracket at the rotating end of the stretch arm is used as the film. The present invention relates to an improvement in a film gripping / cutting apparatus for cutting between a roll and a rolled bale that has been packaged, and for holding an end of the cut film in a body of a wrapping machine.

[0002]

2. Description of the Related Art A stretch arm in which a film roll is loaded on a bracket provided at a rotating end is rotated around a roll bale that can be supported on a bale support of a wrapping machine, and a film is wound on the roll bale. In the wrapping machine to be attached, the film gripping / cutting device includes first means shown in FIGS.
0 and the third means shown in FIGS.

The first means shown in FIGS. 1 to 5 is, as shown in FIGS. 1 and 2, in a state in which a cut arm b pivotally supported on the machine frame 1 is raised by a hydraulic cylinder a supported on the machine frame 1. ,
A film arm d mounted on the free end side of the stretch arm c by rotating a stretch arm c pivotally mounted on the machine frame 1 or a cage 2 provided on the machine frame 1.
After the film f fed from the film roll F loaded in the above is wound around the cut arm b which has been erected, the rotation of the stretch arm c is stopped, and the cut arm b is moved to the position shown in FIG.
5, a cut bracket which is disposed on the machine frame 1 by being tilted as shown in FIG. 5 and disposing the film f in a wide position, that is, with a very small thickness, at a position corresponding to the cut arm b which is turned upside down. This is a means for cutting the film b on the roll bale B side with a knife h attached to the cut bracket e as shown in FIG.

The second means shown in FIGS. 6 to 10 is basically the same as the first means, except that the tip of the cut arm b is a chevron-shaped guide G. After the stretch arm c is stopped at a position where the film f should slide into the mountain guide G as shown in FIG. 8, the cut arm b is slid down as shown in FIGS. The film f that has become the cut bracket e is sandwiched between the cut film e and the knife h attached to the cut bracket e.
And means for cutting the roll bale side of the film f as shown in FIG.

The third means shown in FIGS. 11 to 14 is basically the same as the first and second means described above. In this means, a pin p in a direction perpendicular to the arm b is attached to the tip of the cut arm b. Thus, the stretch arm c is rotated while the cut arm b is raised, and the film f is wound around the cut arm b where the film f is raised as shown in FIGS. After the rotation of the stretch arm c is stopped at a position where the film f between becomes a slightly smaller angle than a right angle with respect to the rotation axis of the cut arm b, FIG.
And by lowering the cut arm b as shown in FIG.
The film f is pinched between the cut bracket e and the pin f at the end of the cut arm b while being narrowed to a narrow width. At this time, the film f is pulled downward by the pin p to be attached to the cut arm b. In this case, the roll f of the film f is cut on the knife h.

Next, the wrapping machine A wraps the film f around the outer peripheral surface of the roll bale B, and the wrapping operation is performed in a state where the bale support D is fixed as shown in FIG. The film bracket d that supports the film roll F, which is a bundle, is rotated so as to rotate around the bale support D, and at the same time, one of the pair of rollers R1 and R2 on the upper surface of the bale support D is rotated. R1 is driven so that the roll bale B is slowly rolled around the axis of the roll bale to sequentially displace the winding position of the film f in the circumferential direction.

At this time, the portion between the cut arm b and the cut bracket e is stretched between the side surface of the roll bale B and the portion between the cut arm b and the cut bracket e. On top of film roll F
Since the new film f which is delivered from is successively covered, this newly delivered film f is
The overhanging portion indicated by the symbol Y in FIG. 15 is drawn by being sandwiched between the cut arm b and the cut bracket e and overlapping the start end side of the film f that is overhanging from the peripheral surface of the roll bale B. And the width of the film f is reduced, and the overlapping of the side surfaces of the roll bale B becomes uneven. In order to prevent this, the stretch arm c is rotated several times, and when the next film f is overlaid on the film f and cannot be removed (FIG. 15), the cut arm b is raised, It is necessary to carry out an operation of pulling out the film f that is being touched. In the prior art, the work for performing this is performed in the following steps.

[0008] As shown in FIGS. 16 and 17, the stretch arm c rotates several times, and the new film f covers the film f sandwiched between the cut arms b.
When the film f does not come off from the roll bale B even when the gripping of the film f by the cut arm b is stopped, the rotating stretch arm c is moved to a position where the stretch arm c does not interfere with the unwound film even when the cut arm b is raised. To stop. . In this state, as shown in FIGS.
And pull out the film f sandwiched. . When the film f comes off, the cut arm b is lowered again as shown in FIGS.
The film f is wound around again.) . In this state, the stretch arm c is rotated, and the film f is wound around the roll bale B.

Next, the operation of gripping and cutting the film at the end of winding is performed as follows. . When the winding is completed as shown in FIGS. 22 and 23, the film f from which the cut arm b is fed out even if the cut arm b is raised when the stretch arm c is rotated.
Stop at a position that does not interfere with . In this state, as shown in FIGS.
Erect. . The stretch arm c is rotated again to stop the stretch arm c at the position where the film f is wound around the cut arm b as shown in FIGS. . As shown in FIGS. 28 and 29, the cut arm b is lowered, the film f is sandwiched, the film bracket e is gripped, and the roll bale B is cut.

Whether the driver performs this operation while observing the position of the stretch arm c visually and observing the order,
Or, a conventional means is to form a sequence circuit and let the machine automatically do it.

If these operations are to be performed automatically, it is necessary to accurately control the stop position of the stretch arm c. A method of using a proportional electromagnetic hydraulic control valve for reducing c, or mechanically applying a brake is employed.

[0012]

The above-mentioned conventional means have the following disadvantages. In the first film gripping / cutting means shown in FIGS. 1 to 5, since the film f is kept wide, the film f remains thin (0.025 mm) and has no strength. May fail. In addition, since cutting is performed in a wide range, a wide range of knives is required. Also, since the cut bracket e is fixed, it is possible to make a time difference between the operations so that the gripping is performed first and then the cutting is performed after the operation of gripping and cutting the film f. It is difficult, and sometimes the cutting is performed in advance, so that the film f is cut and slipped out, or the cutting is not performed even if the film f is pinched.
There is a disconnect failure. Further, since the position of the cut bracket e is apart from the side surface of the roll bale B on which the film is wound, after cutting, the end side of the separated film f hangs long from the roll bale B, and the roll bale B is moved to the field. After the film is released, the end side of the film f flaps with the wind, so that there is a disadvantage that the wound film f is easily released from the roll bale B and comes off.

The second film gripper shown in FIGS.
In the cutting means, the film f is gathered into a narrow width by the angled guide G and sandwiched between the cut brackets e, so that the film f falls within the range of the angled guide G at the tip of the cut arm b where the film f falls down (see FIGS. 10), when the film f is pressed by the cut arm b, the film f
From the cut bracket e. That is, the stretch arm c must be stopped between the solid line and the two-dot chain line in FIG. 10, the range is narrow, and the alignment is difficult. In addition, if the positional deviation in the front-rear direction between the time when the cut arm b rotates and stands and the time when the cut arm b falls is large, the film f comes off from the chevron guide G, and this positional deviation is minimized. Therefore, it is necessary to make the cut arm b longer than necessary. Further, in this means, the cut bracket e is fixed similarly to the above-described first means, so that there is a failure in gripping / cutting as in the first means.

In the third film gripping / cutting means shown in FIGS. 11 to 14, a cut bracket e is formed while gathering a film f into a narrow width with a pin p at the tip of a cut arm b.
Since the film f is not in the range of the cut bracket e (the hatched portion in FIG. 12), the film f cannot be separated from the cut bracket e. That is, the stretch arm c must be stopped between the solid line and the two-dot chain line in FIG. 12, the range is narrow, and positioning is difficult. The position of the film f to be cut with respect to the knife h changes due to a difference in the height of the side surface of the roll bale B of the film f to be cut or a difference in the diameter of the formed roll bale B. In this case as well, there is a failure in gripping / cutting as in the above two examples. Further, similarly to the above-described first object, there is a similar defect that the end of the film f which is cut and hangs down from the roll bale B is long as shown in FIG.

Next, in the conventional means for removing the gripped film f from the cut bracket e shown in FIGS. 15 to 21 and described above, the stretch arm c is aligned and stopped at a substantially accurate position. , Cut arm b
There is an annoyance in the operation of raising and lowering and rotating again. Also, by temporarily stopping the rotation of the stretch arm c while raising and lowering the cut arm b, the winding is interrupted and the efficiency of the packaging operation is reduced. In addition, since the cut arm b is lowered to the position of the cut bracket e again after the grip of the film f is released, the film f intended to be released may be pinched again while being stuck to the cut arm b or the cut bracket e. .
In particular, in the case shown in FIG. 15, the starting end of the film f sandwiched between the cut arms b comes closer to the sandwiching side as the roll bale B slowly rolls around the center of the axis. f loosened,
There is a high possibility that it will be hard to separate and will be pinched again.

Next, in the above-mentioned film gripping / cutting means shown in FIGS. 22 to 29, similarly to the above-mentioned means for removing the film f, the operation of adjusting the stop position of the stretch arm c and the cut arm b By performing the operation of raising and lowering and the operation of re-rotating the stretch arm c, there is a troublesome operation. The same holds true for a reduction in the efficiency of the packaging operation caused by temporarily stopping the rotation of the stretch arm c.

Further, a proportional electromagnetic hydraulic control valve or a mechanical brake device for automatically performing this operation has a disadvantage that the structure is complicated and expensive.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem occurring in the film gripping / cutting device in the conventional wrapping machine. The operation is simple and efficient with a simple mechanism. When the lapping operation is completed, the roll bale B side at the end side of the film f is cut, and the operation of gripping the cut bracket e side is separated from the starting end side of the film f gripped when the lapping operation is started. It is an object of the present invention to provide a new means for ensuring that the operation is performed accurately and reliably.

[0019]

Means for Solving the Problems In the present invention, as a first means, as shown in FIGS.
A pivotal support is provided such that the stretch arm c is pivotally supported on the machine frame 1 or the cage 2 provided on the machine frame 1 so as to be positioned inside the rotation trajectory of the rotating end of the stretch arm c so as to swing up and down on the machine frame 1. Cut arm b, a cut bracket e that is arranged at a position where the cut arm b pivots and is mounted on the machine frame 1, and a cut arm b that pivots downward from the standing posture toward the cut bracket e. And a knife h mounted on the machine frame 1 so as to cut the film f to be raked.
A film raising and lowering member 66 is mounted on the machine frame 1 so as to move along the cut arm b and move toward the distal end thereof as the robot rotates in the falling direction, and the film f is wound around the cut arm b in an upright posture and brought into contact therewith. The contact portion with the cut arm b is raised toward the rotation end side of the cut arm b during the operation of the cut arm b squeezing toward the cut bracket e, thereby forming a string-shaped spring. A film gripping / cutting device in a lapping machine characterized by being exposed to a knife h can reliably perform film gripping / cutting without failure, and provides a means with a simple mechanism and easy operation. .

FIGS. 33 to 36 show a second means.
As shown in the figure, the stretch arm c pivotally supported on the machine frame 1 or the cage 2 provided on the machine frame 1 is positioned inside the turning locus of the turning end of the stretch arm c, and A cut arm b that is pivotally supported so as to move, a cut bracket e that is arranged at a position where the cut arm b pivots and is mounted on the machine frame 1, and a cut arm b that pivots downward from a standing posture. In a film gripping / cutting device of a wrapping machine comprising a knife h mounted on the machine frame 1 so as to cut a film f scraped toward a cut bracket e,
The machine frame 1 is arranged at the position corresponding to the fallen cut arm b.
Is provided on the machine frame 1 so as to be movable up and down, and is urged upward by a spring 71, so that the knife h is
The cut bracket e is arranged so as to be pressed against the film f scraped by the cut arm b during the lowering operation in which the cut bracket e comes into contact with the cut arm b which is pivoting down and lowers against the spring 71. A film gripping / cutting device 2 in a lapping machine, characterized in that the film f is gripped and cut in advance, followed by cutting. Can be performed without fail, and the mechanism offers simple means.

Further, as a third means, FIGS.
As shown in FIG. 1, a machine frame 1 or a cage 2 provided in the machine frame 1
A hydraulic cylinder a for arranging the inside of the rotation trajectory of the rotation end of the stretch arm c pivotally supported on the machine frame 1 and for raising and lowering the cut arm b is mounted on the machine frame 1 and its hydraulic pressure is A push-up mechanism 8 that is movable up and down and urged upward by a spring 83 is disposed at a position where the cut-off arm b comes into contact with the cut arm b that is tilted down by the cylinder a. When the pressure of the circuit is released, the hydraulic cylinder a is tilted down and rotated to raise the cut arm b pressed against the cut bracket e so as to form a gap for extracting the film f with the cut bracket e. Film wrapping machine, characterized in that the film f
Is reliably performed without failure of the operation of pulling out from the cut arm b, and a simple and highly efficient means is provided.

Further, as a fourth means, FIGS.
As shown in FIG. 45 and FIG.
A bale support D that rolls freely and a stretch arm c that rotates around it by a hydraulic motor M are mounted. A cut arm b and a knife h that rotate up and down are mounted on both sides of the machine frame 1. In a lapping machine equipped with a film gripping / cutting device W composed of a cut bracket e and the like, a pipeline 102 for reducing the amount of oil flowing through the hydraulic motor M to a small amount is connected to a hydraulic circuit of a hydraulic motor M for rotating a stretch arm c. And the solenoid-operated switching valve 1 switches to a state in which oil flows through the hydraulic motor M via the pipe line 102.
03, and the rotation of the stretch arm c during the operation of raising the cut arm b is controlled at a low speed by the control of the electromagnetic switching valve 103. Accordingly, the present invention proposes a means that can efficiently and efficiently hold and cut a film by a simple operation.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A film gripping / cutting device in a wrapping machine according to the present invention is a machine frame 1 or a machine frame 1.
The stretch arm c is pivotally supported by the cage 2 mounted on the frame 2 and is arranged inside the rotation trajectory of the free end of the stretch arm c. Support,
A hydraulic cylinder a, which is an operating member for turning up and down, is connected to this, and when the cut arm b is turned downside down by the hydraulic cylinder a as the operating member, it comes into contact with the cut arm b. The cut bracket e is arranged at the position corresponding to the above, mounted on the machine frame 1, and the stretch arm c is pivoted in the state where the cut arm b is erected and the free end thereof Roll F loaded on the film bracket d
Is wound around the outer periphery of the cut arm b standing up, and in this state, the turning operation of the stretch arm c is stopped, and the cut arm b is turned downside down to turn the cut arm b into contact with the film f. Is cut between the cut bracket e and the knife f and pressed against the knife h to cut the roll bale B side of the film f, and the end of the film f fed from the film roll F is cut into the cut arm b and the cut bracket. e, holding the roll bale B and the film roll F separated from each other is the same as that of the conventional means, but the cut arm b is turned from the upright state to the down state. When moving, the raising member 66 moving toward the distal end of the cut arm b in accordance with the rotation operation of the cut arm b is mounted on the machine frame 1. .

Then, from the state where the film f is wound around the cut arm b which has been turned upright and the stretch arm c has been stopped, the cut arm b is turned downside down and the film f which is in contact therewith is rotated. When the film f is squeezed toward the cut bracket e, the contact portion of the film f with the cut arm b is moved up by the raising member 6.
6 is sequentially raised toward the distal end side of the cut arm b so as to spring in a string shape.

The raising member 66 allows the machine frame 1 to move the moving member 64 which moves along the cut arm b with the raising / lowering rotation of the cut arm b from the standing posture of the cut arm b by an appropriate link mechanism. The cutting arm b may be provided so as to be restricted to move toward the distal end side as it turns to the falling posture, and may be supported by the cutting arm b.

However, when the cut arm b which is rotatably supported on the machine frame 1 is operated by the hydraulic cylinder a which is an operating member provided on the machine frame 1, the hydraulic cylinder a
Move the link 6, and the connection point of the link 6 with the cut arm b is located on the proximal end side for the cut arm b standing up, and located on the distal end side for the cut arm b lying down, In this case, the cut arm b is displaced in accordance with a change in the rotation posture of the cut arm b, and the cut arm b is raised and lowered through the link 6 by the operation of the hydraulic cylinder a. The moving member 64 may be provided at a connecting point of the link 6 with the cut arm b, and the member 64 may also serve as the connecting point.

Further, the film f approached by the cut arm b is thereby held between the cut bracket e and the cut bracket e in a string-like spring state. It is mounted on the frame 1 and urged upward by a spring.

The spring pressure of the spring for urging the cut bracket e upward is set to be weaker than the turning force of the cut arm b, which is turned by the operation of the operating member, to the falling side. When the cut arm b comes into contact with the cut bracket e, the cut bracket e
To descend while compressing the spring.

The stroke of the lowering operation of the cut bracket e at this time is set longer than the stroke required for the knife h to cut the film f by the lowering operation of the cut arm b.

Further, a knife h for cutting the film f held between the cut arm b and the cut bracket e on the roll bale B side thereof has a cutting arm b which has been turned upside down. Bracket e
When it starts contacting and lowering it, the film f
During the lowering operation of the cut bracket e, which is pressed down by the cut arm b and descends without contacting the
The film f is arranged so as to be in contact with the film f and cut therefrom, and is mounted on the machine frame 1. Thus, the gripping and cutting of the film f are clearly separated, and the gripping of the film f is performed in advance, and thereafter, the film f
To be cut.

When cutting the film f with the knife h, the cut arm b pushes down the cut bracket e while compressing and contracting the spring against the bias of the spring, so that the film f is strongly gripped. In this case, it is effective that the film press 63 for pressing the film f into the knife h is arranged on the link 6 so as to correspond to the knife h.

As a result, when the film f is securely held by the cut bracket e, the film f is cut by a knife h on one side of the cut bracket e, and the cut bracket b is used by the cut arm b during the cutting process. By pushing e, the side remaining after the cutting is more strongly held.

Like the above-mentioned cut bracket e, the up-and-down movable range of the push-up member 8 is approximately several centimeters, and the spring pressure of the spring 83 for urging the ascending side is the hydraulic cylinder a. Is set to be weaker than the turning power of the cut arm b which is turned downside down to the descending side.

Further, when a hydraulic cylinder a that expands and contracts is used as an operating member that raises and lowers the cut arm b, the hydraulic cylinder a is moved so that the hydraulic cylinder a comes into contact with the cut arm b that lowers and rotates. A push-up member 8 that is pushed into abutment with the cut-off arm b that is falling and rotating at a position adjacent to the cut bracket e provided on the frame 1,
It is provided on the machine frame 1 so as to be vertically movable and urged upward by a spring 83.

Thus, the pressure of the hydraulic circuit of the hydraulic cylinder a is released from the state in which the cut arm b is turned down by the hydraulic cylinder a and pressed against the cut bracket e. Spring 8 that was contracted
3, the cut arm b is slightly lifted, and a gap is formed between the cut arm b and the cut bracket e. When the packaging operation of the roll bale B is started, When the film f is wound around the roll bale B several times, the rotation of the stretch arm c is stopped, and the work of pulling out the starting end of the film f from the cut bracket e by raising the cut arm b is performed by a hydraulic cylinder. By releasing the oil pressure of the hydraulic circuit a, the operation can be performed instantaneously without raising the cut arm b.

At this time, the hydraulic cylinder a is moved in the opposite direction to the cut arm b, so that a negative pressure is formed in the tube side 97 of the hydraulic cylinder a. 8. Stop at the position pushed up. In this state, the stretch arm c is rotated to wind the film f, and after that, the hydraulic circuit of the hydraulic cylinder a is returned to the old one by an electromagnetic switching valve or the like.
Prepare so that the cutting arm b can be raised and lowered.

The hydraulic circuit of the hydraulic motor M for rotating the stretch arm c is connected to a pipeline 102 for switching the amount of oil flowing through the hydraulic motor M to a small amount by means of an electromagnetic switching valve. .

Accordingly, when the wrapping of the film f on the roll bale B is completed and the cut arm b is raised and lowered to cut the film f, the oil flowing to the hydraulic motor M by the operation of the electromagnetic switching valve is turned on. By reducing the amount, the rotation speed of the stretch arm c is reduced, and the upright rotation of the cut arm b can be reliably performed within the interval of the stretch arm c that rotates.

This means further comprises a stretch arm c
By controlling the hydraulic cylinder a to operate when the stretch arm c is rotated to a predetermined position away from the cut arm b, in combination with a detection unit that detects a rotation position during the turning operation of The film f can be gripped and cut by the automatic control so that the film f can be gripped and cut by the up-and-down rotation of the cut arm b. Further, by combining with the counter for counting the number of times the stretch arm c is rotated, the wrapping operation is completed. Then, the gripping / cutting of the film f can be automatically controlled.

[0040]

Next, an embodiment will be described in detail with reference to the drawings. In the drawings, the same reference numerals are used for components having the same effects as those of the conventional means.

FIG. 57 is an overall perspective view of a wrapping machine A for carrying out the film gripping / cutting means according to the present invention, wherein 1 is a machine frame, and 2 is a cage mounted on the upper surface of the machine frame 1. 3, a lift arm pivotally mounted on the front side of the cage 2 so as to rotate back and forth, c and c are a pair of stretch arms pivotally supported on the lower surface of the ceiling of the cage 2.
d and d are film brackets mounted on the lower ends of the respective stretch arms c and c so as to load the film roll F, W
W indicates a film gripping / cutting device mounted on the left and right side frames 10, 10 of the machine frame 1, respectively.

FIGS. 57 to 62 show a lapping machine for carrying out the present invention. In this embodiment, the lapping machine A is of a towed type in which the tractor T is connected and towed to the rear portion of the body of the tractor T, as shown in FIG. A connecting rod 11 is provided for connecting to a connecting hitch provided at the rear end of the body of the tractor T.

The connecting rods are connected to left and right side frames 10 of the machine frame 1.
10 is connected to the front end of one of the side frames 10 so as to be rotatable left and right around the fulcrum shaft 12 and the rotation thereof is applied to a hydraulic circuit of a hydraulic device mounted on the body of the tractor T. The operation is performed by the operation of the hydraulic cylinder 13 which is operated by being connected via a hose.

Then, as shown in FIGS. 57 and 59, the machine frame 1 rotates the lift arm 3 upward by the lateral rotation of the connecting rod 11, and the front end side is opened upward. In this state, the tractor is moved forward by traveling, so that the roll which is left on the ground surface of the field from the open end on the front end side of the machine frame 1 which is offset to the side of the tractor when viewed from the traveling direction of the tractor. The bale B is accommodated in the machine frame 1.

On the upper surface of the machine frame 1, a cage 2 which rises in a tower shape is mounted. On the front side of the cage 2, a lift arm whose upper end is supported by a support shaft 30 is provided. 3
However, the lift roller 4 for scraping the roll bale B is supported at its lower end by a floating shaft at the lower end thereof.

When the roll bale B is scraped into the machine frame 1 and the cage 2 by the rotation of the lift arm 3 as shown in FIGS. 59 and 60, the lift roller 4 is moved to the end of its operation. 61, the bale B is attached to the machine casing 1 as shown in FIG.
The bale B is cooperated with the driving roller 5 that is supported on the rear end side of the bale B.
, So that the bale support D is configured to roll freely.

The bale support D in this example is a machine frame 1
And a drive roller 5 driven by a hydraulic motor which is operated by being connected to a hydraulic circuit of the hydraulic device of the tractor via a hydraulic hose and supported by a horizontal shaft at the rear end of the tractor. The lift roller 4 pivotally supported at the lower end,
As shown in FIG. 61, when a state is established in which the predetermined distance is maintained and the front and rear are parallel, the rotation of the lift arm 3 is stopped and this state is maintained.

That is, by the rotation of the lift arm 3, the roll bale B taken into the machine frame 1 and the cage 2 as shown in FIG. , By the lift roller 4 at the lower end of the
The lower peripheral surface is supported by the lift roller 4 while the rear end of the lower peripheral surface is pushed up above the drive roller 5 while being fed rearward, and the state shown in FIGS. 61 and 58 is obtained. The drive roller 5 and the lift roller 4 in this state position are rotatably supported by each other. In this state, the lift arm 3 is held in that state position, whereby the drive roller 5 and the lift roller 4 are lifted. A bale support D is constituted by the rollers 4.

The lift arm 3 is controlled so that its rearward rotation operation is stopped in a state where the lift roller 4 at the lower end and the drive roller 5 are at a position constituting the bale support D. In this state, when the drive roller 5 is driven by the operation of the hydraulic motor in this state, the roll bale B to be supported is rolled about the center of the axis of the roll bale.

The cage 2 supported on the upper surface of the machine frame 1 has a pair of pivots about the support shaft 20 by a hydraulic motor M connected to a hydraulic device on the tractor side and operated on the lower surface side of the ceiling of the cage 2. The stretch arms c and c are pivotally supported, and a film bracket d for pivotally supporting a plastic film roller F is provided at each lower end of each of the free ends that are curved and lowered. The unfolded film f is supported on the upper surface of the aforementioned bale support D,
By the driving of the driving roller 5, the film is wound around the roll bale B which is slowly rolling around the axis of the axis by the operation of the film bracket d which rotates around the roll bale B by the turning operation of the stretch arms c and c. It will be attached and packed.

In this wrapping operation, before the start of the wrapping operation, the starting end of the film f fed from the film roll F loaded on the film bracket d is connected to the cut arms b and the cut brackets on both sides of the machine frame 1. e, the stretch arm c is rotated several times and the film f is not entangled on the peripheral surface of the roll bale B so that the film f does not come off. The gripping of the sandwiched film f is released and the film f is separated from the machine frame 1.

When the packaging is completed, the cut arm b
Extend the hydraulic cylinder a for operating the
And the film f between the film roll F and the roll bale B loaded on the film bracket d is wound around the cut arm b, the operation of the hydraulic motor M is stopped, and the stretch arms c and c are stretched. To stop.
Then, the hydraulic cylinder a for operating the cut arm b is contracted, and the cut arm b is tilted to cut the roll bale B side of the film f, and the end of the film f on the feeding side is cut with the cut arm b and the cut bracket. e
The machine frame 1 is gripped so that the roll bale B that has been wrapped is released and the film f is wound around the next roll bale B.

Next, the operation of releasing the roll bale B from the upper surface of the bale support D is performed by further lifting the lift arm 3 in which the lift roller 4 pivotally supported at the lower end is stopped at a position where the bale support D is used. By rotating the lift roller 4 rearward from the state, the lift roller 4 is displaced rearward and upward as shown in FIG. 62. For this reason, in this example, the discharge direction of the roll bale B is directed to the rear of the machine frame 1.

FIGS. 30 to 36 are a side view and a partial sectional view of a film gripping / cutting device W in a lapping machine embodying the present invention, and FIGS. 47 to 51 are top views thereof. 52 to 56 are perspective views thereof.

The film gripping / cutting devices W are provided in a pair on the left and right side frames 10 and 10 of the machine frame 1 so as to occupy a 180-degree rotationally symmetric position about the rotation axis of the stretch arm c. Each of the film gripping / cutting devices W is provided with a film bracket for supporting the film roll F on the bale support D between the roll bale B and the film roll F before the roll bale B is released. e
Hydraulic cylinder a for gripping at the side and preparing for winding of the next roll bale B, and for cutting off the connection with the roll bale B to enable release of the roll bale B
With respect to the provision of the cut arm b which is pivoted up and down and the cut bracket e fixedly provided on the machine frame 1 side, there is no difference from that of the conventional means.

However, as shown in FIGS. 52 to 56, the cut arm b of the film gripping / cutting device W moves up and down around the support shaft 60 as shown in FIGS. The link 6 pivotally supported in the front-rear direction around the support shaft 61 is formed by an operation of rotating the link 6 back and forth by the expansion and contraction operation of the hydraulic cylinder a. A round bar-shaped film holder 63 for holding the knife cover 62 and the film f against the knife h for cutting is attached, and a moving member 64 is attached slightly below this so as to be rotatable around the support shaft. ing.

The moving member 64 is supported by a pair of spool-shaped plastic rollers 65, 65 which are rotatable around support shafts 650, 650 so as to oppose a pair of rollers. And moving the movable member 64 with the cut arm b as a guide.
It is made to move along. At the tip of the moving member 64, there is provided a round bar-shaped lifting member 66 which can lift the film f without breaking it.

The cut arm b which pivots up and down around the support shaft 60 around the support shaft 60 on the machine frame 1 has a round bar at the longitudinally intermediate portion of the arm portion and a round bar on its outer periphery. A plastic pipe 67 rotatable about a portion formed at the center is covered.

An intermediate portion in the longitudinal direction of the cut arm b is
The link 6 is slidably sandwiched between a pair of rollers 65 of a moving member 64 provided on the distal end side of the link 6, and the link 6 is rotated about the support shaft 61 by the operation of the hydraulic cylinder a. The pair of rollers 65 rotate the cut arm b about the support shaft 60 while moving on the cut arm b. The moving member 64 is pivotally supported by the link 6 so as to swing freely around the center of one support shaft 650 of the two rollers 65 so as to move smoothly on the cut arm b. Thereby, the support shaft 6 of the pair of rollers 65
The line connecting lines 50 and 650 is always perpendicular to the cut arm b.

The cut bracket e corresponding to the cut arm b is located slightly on the tip side of the roller bracket 64 when the cut arm b falls down and becomes horizontal as shown in FIGS. 33, 34 and 54. Coordinate
The mounting table 70 provided on the machine frame 1 is provided to be vertically movable. The cut bracket e is pushed upward by a spring 71 as shown in FIGS. 52 to 56, and the end of the rising operation thereof is regulated by a stopper 72 provided on the upper end side of the mounting base 70. The downward movement is possible only by the distance that the pin provided on the cut bracket e slides in the guide long hole 73 provided on the mounting base 70. The spring force to push up is made strong.

At a position slightly above the cut bracket e, a sharp flat blade-shaped knife h is fixedly provided on the machine frame 1.

The push-up mechanism 8 is positioned adjacent to the cut bracket e at a position corresponding to the tip end of the cut arm b which is pivoted down and down, as shown in FIGS. 40, 41 and 52 to 56.
Is mounted on the machine frame 1 as shown in FIG. In this example, the push-up mechanism 8 is formed in a shaft rod shape having a seat plate-shaped head 80 at the upper end, and the machine frame 1 provided with the above-described mounting base 70.
The guide tube 81 is fixedly mounted on the mounting machine frame 10a integral with the side frame 10 of the above, and the shaft rod portion 8a is slidably fitted into the guide tube 81, so that the machine frame 1 is vertically movably mounted. It is.
A spring 83 provided between the mounting bracket 82 and the head portion 80 of the guide tube 81 urges the ascending side upward, and the end of the ascending operation thereof is a nut screwed into the lower end of the shaft rod portion 8a. 84 is regulated by abutting against the lower surface of the mounting bracket 82 of the guide tube 81. When the cut arm b is turned over, the push-up mechanism 8 descends while pressing and contracting the spring 83 against the tip of the cut arm b. The restoring force of the spring 83 lowers the tip of the cut arm b. Acts to push up. Cut arm b at this time
40 and 55, the spring 83 contracts and the spring pressure increases as the pushing-up mechanism 8 is pushed in, thereby increasing the spring pressure.

When holding and cutting the film, the cut arm b
The stretch arm c is stopped with the film f wound thereon as shown in FIGS. 30, 49 and 52. In this state, when the hydraulic cylinder a is contracted, the link 6 rotates, and the moving member 64 at the distal end thereof rotates.
A pair of rollers 65, 65, which are pivotally supported on the arm, move from the root portion to the tip portion of the cut arm b, and cause the cut arm b to fall and rotate. At this time, the film f is moved to the front end while the film f widely wound around the cut arm b is lifted toward the front end side of the cut arm b by the round bar-shaped raising member 66 provided on the moving member 64. It springs like a string. The arm part of the cut arm b is shown in FIG.
52. As shown in FIG. 52, it is formed in the shape of a round bar, and the outer periphery thereof is covered with a slippery plastic pipe 67. Therefore, the thin film f is moved up by the cut arm b, and the lifting member 66 is lifted. When the film f is lifted, the tension acting on the film f is reduced to make the film f hard to break. At this time, the film f is sequentially cut into the arms b.
The strength is increased by the string-like spring being reliably moved by the raising member 66 which moves to the rotation end side of the film bracket e.
The gripping portion can be securely held without a weak portion being cut off or being partially pinched insufficiently. Also,
Since the width of the film f is narrowed by a string-like spring, a short knife h for cutting can be used.

Also, the film f wound around the cut arm b is forcibly lifted toward the distal end of the cut arm b by the lifting member 66 at the distal end of the moving member 64, as shown in FIG. The displacement of the stop position of the stretch arm c for holding the cut arm e between the cut brackets e by reliably forming the cords f in a string shape is relaxed to a range (the range between the solid line and the two-dot chain line in FIG. 51) larger than that of the above-described conventional means. As a result, the positioning can be easily performed, and the length of the cut arm b can be minimized.

Further, as shown in FIG. 32, the cutting position of the film f can be close to the cylindrical surface of the roll bale B, so that the length of the film f which hangs from the roll bale B when cut can be shortened. This has the advantage that the film f does not easily flutter.

As shown in FIG. 33, FIG. 34 and FIG. 54, the film f springed in the form of a string at the tip end of the cut arm b by the raising member 66 provided on the moving member 64 mounted on the machine frame 1 , Cut arm b and cut bracket e
At this time, the cut bracket e, which descends against the spring 71, rises by the restoring force of the spring 71, and is thereby held by the spring pressure. However, in this state,
As shown in FIG. 34, the film f pressed by the round bar-shaped film holder 63 provided on the knife cover 62 has not yet hit the knife h provided on the machine frame 1 and has not been cut. Further, as shown in FIGS. 35, 36 and 55, the film f pressed by the film holder 63 of the knife cover 62 with the cut arm b and the cut bracket e lowered, and the spring 71 of the cut bracket e further contracted.
Hits the knife h so that the roll bale B of the film f
The side will be cut off. At this time, the film f side of the film f is already sandwiched between the cut arm b and the cut bracket e by a spring force which cannot be disengaged in FIGS. 33, 34 and 54, and the spring 71 further contracts. Needless to say, it cannot be pulled out because it is sandwiched by strong force.

Next, the hydraulic circuit of the hydraulic cylinder a for operating the cut arm b of the film gripping / cutting device will be described. As shown in FIGS. 38 and 39, when the hydraulic cylinder a expands and the cut arm b rises, the hydraulic pipeline 90 on the return side is branched into 90a and 90b, and one pipeline 90a is connected to the hydraulic cylinder 90a. a is guided to the valve 91 side for actuation, and the other pipeline 90b is connected to the pipeline 93 communicating with the tank t of the tractor via the electromagnetic switching valve 92.
This electromagnetic switching valve 92 is an "open" electromagnetic switching valve only when energized, and is normally a "closed" electromagnetic switching valve.

As shown in FIG. 37, a sensor S1 is provided on the stretch arm c, and a sensor S2 responsive to the sensor S1 which is electrically wired is provided below the cage 2 on the rotational passage of the sensor S1. The number of rotations of c is counted and can be displayed on the display 94 (FIG. 38).

As shown in FIGS. 15 and 37, the stretch arm c rotates several times, and a new film f covers the film f sandwiched between the cut arms b. Stretch arm c that prevents f from coming off the peripheral surface of roll bale B
Is input to the controller 94 in advance, and when the number counted by the sensors S1 and S2 reaches this number,
As shown in FIG. 8, the controller 94 automatically supplies electricity to the electromagnetic switching valve 92, and opens the valve 92 to open the tank t.
When the winding is completed, the electricity is automatically cut off and the electromagnetic switching valve 92 is closed as shown in FIG.
And

Further, the number of rotations may be displayed on the controller 94 so that an operator working in the driver's seat of the tractor T can recognize the number of rotations, and the operator may perform the operation artificially. Further, a method may be used in which time is set and displayed instead of the number of rotations to automatically or artificially perform the operation.

Next, the operation of the cut arm b will be described. When the electromagnetic switching valve 92 is closed, the hydraulic cylinder a
Is applied with a relief pressure of 140 kg / cm ² set in a relief valve 95 provided in a pipeline. As shown in FIGS. 40 and 55, the cut arm b is connected to the spring 71 of the cut bracket e.
And the spring 69 of the spring bracket 8 for lifting the cut arm overcomes the spring pressure and falls, and the projection 69 provided on the link 6 hits the mechanical stopper 68 provided on the machine frame 1 and stops. At this time, since the cut arm b and the cut bracket e are strongly pressed by the short and contracted springs 71 and 83, the film f sandwiched therebetween does not come off.

As shown in FIG. 38, when the electromagnetic switching valve 92 is opened, the line 96 on the lot side of the hydraulic cylinder a communicates with the line 93 on the tank t side of the tractor T. Pressure is released. At this time, in order to extend the hydraulic cylinder a and raise the tip of the cut arm b, a force to make the tube side 97 of the hydraulic cylinder a negative pressure is required. The spring bracket 8 shown in FIGS. 41 and 56 lifts the distal end side of the cut arm b in this state, and makes sure that a gap is provided between the cut arm b and the cut bracket e. Support the film f
Make sure that Also, the hydraulic cylinder a
The link 6 is lifted by the spring 83 of the spring bracket 8.
Does not attempt to lift the link 6 and the cut arm b any further due to the negative pressure generated on the tube side 97 due to the piston rotating to the upright side and pulling out the piston. The operation of releasing the grip of the film f during the winding without interrupting the winding of the film as in the above-mentioned conventional means can be performed without any trouble.

Further, the electromagnetic switching valve 92 is energized all the time during the film winding operation and remains "open", that is, the cut arm b and the cut bracket e remain in a state where there is a gap. The cut arm b does not move down again to pinch the film f. Also,
Even when the film f is difficult to come off due to the sagging of the film as shown in FIG. 15, when the roll bale B rolls around the center of the axis and makes a half turn, the film f moves upward and pulls the film f. In addition, since a gap is formed between the cut arm b and the cut bracket e, the cut arm b easily comes off.

FIGS. 42 to 45 show a circuit of the hydraulic motor M for rotating the stretch arm c. This circuit connects the return line 100 to the line 101 when the motor M for rotating the stretch arm c rotates the stretch arm forward.
And 102, one of the pipe lines 101 is connected to an electromagnetic switching valve 103, and further connected to an electromagnetic valve 104 via the valve 103. The other conduit 102 is provided with a throttle valve 105 so that the electromagnetic switching valve 10 can be bypassed.
3 and a line 106 passing through the above-described electromagnetic switching valve 103
To join. This electromagnetic switching valve 103 is "closed" when energized.
It is a normally open electromagnetic switching valve.

As shown in FIG. 48, the electromagnetic switching valve 103 is controlled by a sensor S3 which is electrically wired separately from the above-described count stop sensor S2 which responds to the sensor S1 in the stretch arm c. This sensor S3
Is the sensor S on the same rotation locus of the sensor S1.
2 is installed in the cage 2 so as to occupy a position shifted by about 180 degrees.

Next, the operation will be described. During normal rotation, as shown in FIG. 42, the stretch arm c rotates at high speed because the entire amount of oil passes.

The rotation number of the stretch arm c reaches a preset count number at which the winding by the film f is completed, and at that time, the sensor S1 of the stretch arm c and the frame 1 are integrated as shown in FIG. When the sensor S2 provided on the cage 2 side coincides, the controller 94 automatically sends electricity to the electromagnetic switching valve 103 as shown in FIG. Only the line 102 having the valve 105 is provided. As a result, only a small amount of the throttled oil can pass through the circuit of the hydraulic motor M, so that the rotation of the stretch arm c becomes slow. At the moment when the electromagnetic switching valve 103 is closed, the rotation is still at a high speed due to the inertial force of the stretch arm c, but it is still rotated by about 90 degrees. When the position shown in FIG. In FIG. 4, the sensor S1 of the stretch arm c and the sensor S3 of the cage 2 match.
Even when the cut arms b and b on both sides of the machine frame 1 of FIG. 7 stand and rotate, they pass through a position between the roll bale B and the film bracket e that does not hit the film f. At this time, the sensor S
As shown in FIG. 44, the controller 94 receives the signal by sending the signal to the solenoid valve 91 for operating the cut arm b, extends the hydraulic cylinder a, and raises and lowers the cut arm b. Move.
Stretch arm c while cut arm b is raised
Continues the low-speed rotation, but because the rotation speed is low and the amount of oil used is small, the cut arm b can be completely erected before the stretch arm c makes a half rotation, and the film f is attached to the completely erected cut arm b. Wraps around as shown in FIG. That is, when the film f reaches the position of the cut arm b while the cut arm b is rising, the film f is prevented from piercing or being caught by the tip of the cut arm b.

Next, at the position where the sensor S1 provided on the stretch arm c side and the sensor S2 provided on the cage 2 side coincide (FIG. 50), the sensor S1 as shown in FIG.
When the controller 94 receives a signal from the controller 2, the controller 94 causes the motor M to rotate the stretch arm c.
A signal is sent to the solenoid valve 104 that operates the motor, the solenoid valve 104 is closed, the motor M is stopped, and the stretch arm c is stopped. At this time, since the stretch arm c rotates at a low speed, it can be stopped at an accurate position without overrun. At the same time, a solenoid valve 9 for operating the hydraulic cylinder a
1 to reduce the hydraulic cylinder a and cut the arm b
To hold and cut the film f as described above.
Further, at this time, the electricity of the electromagnetic switching valve 103 is cut off and becomes “open” again, and at the time of restarting, the stretch arm c is rotated at a high speed.

FIG. 64 shows another embodiment of the cut bracket e and the lifting mechanism 8 described above. In this example,
The cut bracket e is rotatably supported at one end of a link 111 rotatable about a support shaft 110.
11 is pulled downward by the tension spring 112, the cut bracket e pivotally supported on the distal end side of the link 111 is pushed up toward the lower surface of the cut arm b, and At this time, the posture is corrected so as to exactly correspond to the lower surface of the cut arm b.
The raising operation of the cut bracket e is stopped by hitting the stopper 72 provided on the machine frame 1 side.

The push-up mechanism 8 has a roller 80 having a head 80 which is in contact with the cut arm b which is tilted and turned, and the head 80 is rotated about a support shaft 85. The lower end side of the link 86 is supported by the upper end of the link 86 and pulled downward and rearward by a tension spring 87 so as to push up the head 80 formed of a roller supported on the upper end side of the link 86. The upward movement of the head 80 formed by the roller stops when the stopper 88 provided on the link 86 hits the abutting portion provided on the machine frame 1 side. Other operations are as described above.

[0081]

As described above, the film gripping / cutting device in the wrapping machine according to the present invention is as follows. While the moving member 64 moves from the root portion to the tip portion of the cut arm b around which the film f is wound, the cut arm b is depressed to spring the film f into a string. 2. After the film f is sandwiched between the cut bracket e pushed up by the spring 71 and the cut arm b obtained by stringing the film f, the cut arm b further lowers the cut bracket e, and the film f is strongly sandwiched. Cut the roll bale B side. 3. The hydraulic pressure of the hydraulic cylinder a of the cut arm b is released, the distal end of the cut arm b is slightly lifted by the spring force of the spring 83 of the push-up mechanism 8, and a gap is reliably taken between the cut arm b and the cut bracket e. The lifting mechanism 8 raises the cut arm b to maintain the state by the negative pressure formed on the tube side 97 of the hydraulic cylinder a and the back pressure on the tank t side by raising the cut arm b. Pull out from between.

As a result, there is no need for complicated apparatus and operation, and there is no failure in gripping / cutting / pulling-out of the film f which has occurred in the conventional means, and the film f can be reliably gripped / cut.
It can be cut and separated.

Further, by controlling the hydraulic pipeline by means of an electrically inexpensive and simple means, the cut arm b is slightly lifted to remove the film f so that the winding of the film f is not hindered, and the stretch arm c is further separated. By making the final rotation of the low-speed rotation, and securing the operation time and oil amount for erecting the cut arm b, the film f can be separated and removed after several rotations from the start of winding, which is the conventional means, and at the end of winding. When raising and lowering the cut arm b for winding the film f around the cut arm b, there is no interruption of the film winding due to the temporary stop of the stretch arm c, and all the operations can be performed while the stretch arm c is being rotated. Therefore, work efficiency is improved, and troublesome operations are not required.

[Brief description of the drawings]

FIG. 1 is a side view of a main part of a conventional lapping machine.

FIG. 2 is a plan view of the same.

FIG. 3 is a side view showing a state in which the cut arm is turned upside down.

FIG. 4 is an enlarged longitudinal sectional view of a film holding portion in the same state as in the above.

FIG. 5 is a plan view in the same state as above.

FIG. 6 is a side view of a main part of another conventional lapping machine.

FIG. 7 is a plan view of the same.

FIG. 8 is a side view showing a state in which the cut arm is turned upside down.

FIG. 9 is an enlarged vertical sectional view of a film holding portion in the above-mentioned state.

FIG. 10 is a plan view in the same state as the above.

FIG. 11 is a side view of a main part of a lapping machine of still another conventional form.

FIG. 12 is a plan view of the same.

FIG. 13 is a side view showing a state where the cut arm is turned upside down.

FIG. 14 is a plan view showing the above-mentioned state.

FIG. 15 is an explanatory view of the packaging operation by the wrapping machine, and is a perspective view at the start of winding.

FIG. 16 is a side view in the same state.

FIG. 17 is a plan view in the same state.

FIG. 18 is a side view of a state in which the cut arm is raised and rotated from the above-mentioned state to release the nipping of the film.

FIG. 19 is a plan view of the same state.

FIG. 20 is a side view of the state where the cut arm is again turned downside down from the same state.

FIG. 21 is a plan view of the same state.

FIG. 22 is an explanatory diagram of an operation of gripping and cutting the film when the winding of the film by the wrapping machine is completed, and is a side view at the time of finishing the winding.

FIG. 23 is a plan view in the same state.

FIG. 24 is a side view of a state in which the cut arm is turned upright from the above state.

FIG. 25 is a plan view of the same state.

FIG. 26 is a side view showing a state where the stretch arm is rotated again from the same state.

FIG. 27 is a plan view of the same state.

FIG. 28 is a side view showing a state in which the cut arm is turned upside down from the above-mentioned state to hold the film.

FIG. 29 is a plan view of the same state.

FIG. 30 is a side view of a main part of the lapping machine according to the first means of the present invention, in a state where the cut arm is upright.

FIG. 31 is a side view in the middle of a process in which a cut arm of a main part of the lapping machine is turned upside down.

FIG. 32 is a side view showing a state where the cut arm is folded down.

FIG. 33 is a side view of a main part of a lapping machine that implements the second means of the present invention, in a state where a cut arm is turned downside down and grips a film.

FIG. 34 is a front view in the same state.

FIG. 35 is a side view of a state in which the one-stage cut arm is further turned down from the above state.

FIG. 36 is a front view in the same state.

FIG. 37 is a side view of a main part of a lapping machine for implementing the third means of the present invention.

FIG. 38 is a hydraulic circuit diagram of a hydraulic cylinder that drives the cut arm according to the third embodiment.

FIG. 39 is a hydraulic circuit diagram in a state where the pressure of the hydraulic circuit of the hydraulic cylinder is released.

FIG. 40 is a side view showing a state where the cut arm is tilted and turned.

FIG. 41 is a side view showing a state in which the cut arm is pushed up by the push-up mechanism when the pressure of the hydraulic circuit of the hydraulic cylinder is released.

FIG. 42 is a hydraulic circuit diagram of a lapping machine that implements a fourth means of the present invention.

FIG. 43 is an explanatory diagram showing a state where the amount of oil flowing to the hydraulic motor that rotates the stretch arm in the hydraulic circuit is reduced to a small amount;

FIG. 44 is an explanatory view of the hydraulic circuit of the above, in which the amount of oil flowing to the hydraulic motor is reduced to a small amount, and oil is supplied to a hydraulic cylinder for raising and lowering the cut arm.

FIG. 45 is an explanatory diagram of a state where the hydraulic circuit has been switched so that the entire amount of oil flows to the hydraulic motor in the hydraulic circuit.

FIG. 46 is a side view of a main part of a lapping machine for implementing the fourth means of the present invention.

FIG. 47 is a plan view of the above.

FIG. 48 is a plan view showing a state where a stretch arm of the wrapping machine is rotated.

FIG. 49 is a plan view of the lapping machine in a state where the stretch arm is further rotated from the above wrapping machine.

FIG. 50: In the same state as the above lapping machine,
It is a top view in the state where the cut arm was turned upside down.

FIG. 51 is a plan view showing a state in which the stretch arm is further rotated from the above-described state of the lapping machine.

FIG. 52 is an explanatory view of a process of holding and cutting the film while bundling the film in a string shape by the tilting rotation of the cut arm of the above lapping machine, and is a perspective view in a state where the cut arm is standing up;

FIG. 53 is a perspective view of the cut arm in the process of falling and rotating.

FIG. 54 is a perspective view showing a state in which the cut arm of the above abuts on the cut bracket to grip the film.

FIG. 55 is a perspective view showing a state in which the cut arm is further turned down one step to cut the film.

FIG. 56 is a perspective view showing a state in which the cut arm is released by the lifting mechanism to release grip of the film when the hydraulic pressure of the hydraulic cylinder is released.

FIG. 57 is an overall perspective view of a wrapping machine that embodies the present invention.

FIG. 58 is a perspective view showing a state where the lift arm of the lapping machine is rotated backward and downward.

FIG. 59 is a side view of the lapping machine connected to the tractor.

FIG. 60 is a side view of a state where the roll bale is being scraped by the lift arm of the lapping machine.

FIG. 61 is a side view of the lapping machine in a state where a roll bale scraped by a lift arm is supported on a support base so as to be able to roll freely.

FIG. 62 is a side view of the wrapping machine in a state where the roll bale that has been packaged is pushed backward.

FIG. 63 is an explanatory diagram showing a state in which a sensor provided on a stretch arm of the lapping machine and a sensor provided on a cage side of the lapping machine are aligned with each other.

FIG. 64 is a side view of another embodiment of the cut bracket and the lifting mechanism.

[Explanation of symbols]

A: wrapping machine, B: roll bale, D: bale support, F: film roll, G: chevron guide, T: tractor, W: film gripping / cutting device, R1, R2: roller, S1, S2: sensor , A: hydraulic cylinder, b: cut arm, c: stretch arm, d: film bracket, e: cut bracket, f: film, g: pin, h: knife, 1: machine frame, 10: side frame, 11 ... Connecting rod, 12 fulcrum shaft, 13 hydraulic cylinder, 2 cage,
3 ... lift arm, 30 ... support shaft, 31 ... hydraulic cylinder,
4 ... lift roller, 5 ... drive roller, 6 ... link, 60
... a support shaft of the cut arm b, 61 ... a support shaft of the link 6, 62
... Knife cover, 63 ... Round film holder, 64 ...
Moving member, 65: Roller, 650: Support shaft, 66: Tack-up member, 67: Plastic pipe, 68: Stopper, 69: Projection, 70: Mounting base, 71: Spring, 72 ...
Stopper, 73: long hole, 8: push-up mechanism, 8a: shaft rod, 80: head, 81: guide tube, 82: mounting bracket, 83: spring, 84: nut, 85: support shaft, 8
6 ... Link, 87 ... Spring, 88 ... Stopper, 90 ... Hydraulic pipeline, 91 ... Valve, 92 ... Electromagnetic switching valve, 93 ... Pipe, 94 ... Controller, 95 ... Relief valve, 96 ... Pipe, 97 ... Tube side.

Claims (4)

[Claims] The stretch arm (c) pivotally supported on the machine frame (1) or the cage (2) provided on the machine frame (1) is arranged inside the turning trajectory of the turning end of the stretch arm (c), and the machine frame (1) moves up and down. A cut arm b that is pivotally supported so as to move, a cut bracket e that is arranged at a position where the cut arm b pivots and is mounted on the machine frame 1, and a cut arm b that pivots downward from a standing posture. In a film gripping / cutting device of a wrapping machine comprising a knife h mounted on a machine frame 1 so as to cut a film f scraped toward a cut bracket e,
When the cut arm b is tilted down and pivoted, the raising member 66 that moves along the cut arm b and moves toward the distal end thereof is mounted on the machine frame 1 and is wound around the cut arm b in the upright posture and brought into contact therewith. The contact portion of the film f with the cut arm b is lifted up toward the rotation end side of the cut arm b during the operation of the cut arm b squeezing toward the cut bracket e, and cut in the form of a string. A film gripping / cutting device in a lapping machine characterized by being exposed to a bracket (e) and a knife (h). The stretch arm (c) pivotally supported on the machine frame (1) or the cage (2) provided on the machine frame (1) is arranged inside the turning trajectory of the turning end of the stretch arm (c) so that the machine frame (1) can move up and down. A cut arm b that is pivotally supported so as to move, a cut bracket e that is arranged at a position where the cut arm b pivots and is mounted on the machine frame 1, and a cut arm b that pivots downward from a standing posture. In a film gripping / cutting device of a wrapping machine comprising a knife h mounted on a machine frame 1 so as to cut a film f scraped toward a cut bracket e,
The machine frame 1 is arranged at the position corresponding to the fallen cut arm b.
Is provided on the machine frame 1 so as to be movable up and down, and is urged upward by a spring 71, so that the knife h is
The cut bracket e is arranged so as to be pressed against the film f scraped by the cut arm b during the lowering operation in which the cut bracket e comes into contact with the cut arm b which is pivoting down and lowers against the spring 71. A film gripping / cutting device for a lapping machine, characterized in that the film f is gripped first and subsequently cut by being mounted on the machine frame 1. 3. A cut arm provided on the machine frame 1 and arranged inside a turning locus of a turning end of a stretch arm c pivotally supported on the machine frame 1 or a cage 2 provided on the machine frame 1. a hydraulic cylinder a for raising and lowering the rotary arm b, and the cut arm b which is tilted and rotated by the hydraulic cylinder a.
A push-up mechanism 8 that is movable up and down and urged upward by a spring 83 is disposed at a position where the push-up mechanism 8
When the pressure of the hydraulic circuit of the hydraulic cylinder a is released, the cut arm b that has fallen and rotated by the hydraulic cylinder a and pressed against the cut bracket e is cut by the cut bracket e.
Characterized in that the film f is raised so as to form a gap for taking out the film f between the film holding device and the wrapping machine. 4. A bale support D for rotatably supporting a roll bale B on a machine frame 1, and a hydraulic motor M around the bale support D.
A wrapping machine equipped with a stretch arm c which is turned by the following method, and a film gripping / cutting device W comprising a cutting arm b, a knife h, a cut bracket e and the like, which is turned up and down, is mounted on both sides of the machine frame 1. The hydraulic circuit of the hydraulic motor M that rotates the stretch arm c is connected to a pipeline 102 that reduces the amount of oil flowing through the hydraulic motor M to a small amount, and is switched to a state in which oil flows to the hydraulic motor M via the pipeline 102. The switching valve 103 is connected, and by controlling the electromagnetic switching valve 103, the turning operation of the stretch arm c during the operation of erecting the cut arm b is performed at a low speed. Cutting device.