JP2003116368A - Mulch film winding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mulch film winding device capable of easily pulling a mulch film which is tightly wound up into a roll shape out of a winding shaft. SOLUTION: This mulch film winding device is equipped with a main shaft 27 rotationally driven by driving force, two or more winding shaft-composing members 28 arranged on a concentric circle around the main shaft 27, flange members 34, 36 for defining both edges of the wound-up film in areas near both ends of the main shaft 27, and bearings 26, 32 for supporting the both ends of the main shaft 27. The flange member 36 and the bearing 32 on one side thereof are freely attachable to and detachable from the main shaft 27. The winding shaft-composing members 28 are each connected to the main shaft 27 through parallel links 46, 46, so that a parallel link mechanism is structured thereby. When winding of the mulch film is completed, and bearing 32 and the flange member 36 are detached, then the links 46, 46 are fallen by making each of the winding shaft-composing members 28 slid along the main shaft 27 in the direction to the end, and further radii of the winding shaft-composing members 28 are each made shorter, so that the mulch film roll is pulled out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding device used in a multi-film stripping device for stripping and winding a multi-film covering a ridge.

[0002]

2. Description of the Related Art In a multi-film winding device, a driving device rotates a winding shaft to apply tension to the multi-film to remove it from the ridges, and to wind the winding shaft in multiple layers. Therefore, a strong compressive force is applied to the winding shaft inward in the radial direction by the wound roll-shaped multi-film, and there is a possibility that the multi-film cannot be extracted from the winding shaft after the winding is completed. for that reason,
For example, in Japanese Utility Model Laid-Open No. 64-24951, each of a plurality of concentric winding members is placed in a cantilevered supporting state, and at the time of winding, the winding members are held in a parallel state to form a winding shaft, and winding is completed. After that, the free end side is reduced in diameter so that the roll-shaped mulch film is pulled out.
In the 04 publication, various measures are taken, such as a cardboard hollow roll being externally fitted and fixed to a winding shaft, and the wound multi-film is taken out from the winding shaft together with the hollow roll.

[0003]

[Problems to be Solved by the Invention]
In the one in which only the free end side of the winding shaft is reduced in diameter as in Japanese Patent No. 24951, the other end side has a large diameter, so that the roll-shaped mulch film strongly presses that portion inward in the radial direction. In reality, it is often difficult to extract from the winding shaft. Moreover, in Japanese Patent Publication No. 7-55104,
It is conceivable that the hollow roller itself made of cardboard buckles due to the compressive force of the wound multi-film and comes into close contact with the winding shaft, making it impossible to remove it from the winding shaft. The present invention has been made in view of such problems of the conventional winding device, and an object thereof is to make it possible to easily extract a multi-film wound in a roll shape from a winding shaft. To do.

[0004]

The present invention is a winding device for use in a multi-film stripping device for stripping a multi-film from a ridge covered with the multi-film,
A main shaft that is rotationally driven by a drive source, and a plurality of winding shaft constituent members that are arranged in parallel on the concentric circle around the main shaft along the main shaft and that rotate together with the main shaft to form a winding shaft. Each of the take-up shaft constituent members changes the diameter of the take-up shaft by moving a predetermined distance along the main shaft while keeping parallel to the main shaft. Twist
Physically speaking, each of the winding shaft constituent members is
Along the main axis while keeping parallel to the main axis from the expanded position of
The diameter of the winding shaft can be reduced by moving it to one side for a certain distance.
It is a small thing.

The winding shaft constituent members are connected to the main shaft, for example, through parallel link mechanisms. this
In this case, as a more specific form, each winding shaft constituent member
Are each flat with the take-up shaft constituent member with respect to the main shaft.
Attached via the links that make up the row link mechanism
That each winding shaft component is in the expanded position when winding.
When set in place, the phosphorus that constitutes the parallel link mechanism is
C is inclined to one side, and the main axis is in the longitudinal direction.
A parallel link having a hexagonal cross section over most of the
The point that the mechanism is installed in each plane of the main shaft,
be able to.

As a concrete form of the winding device,
Set both sides of the multi-film winding near the both ends of the spindle.
Each flange member is installed,
If the shaft component is positioned at the expanded position during winding,
Both ends of each winding shaft constituent member
It is supposed to come to the position where it passed. Also, the above winding
As a specific form of the rotary device, the main shaft is an end portion on one side.
Is supported by a removable bearing on the
Supported by fixed bearings at the ends, which
When the bearing is removed from the one end of the main shaft,
Together with the winding shaft component, the shaft at the other end
It will be cantilevered by the receiver, and the other side
A power transmission mechanism is connected to the end of the. In this case
More specifically, the removable bearing is centered on the support.
Then, it is attached to a frame that is swingable.

Further , as a concrete form of the winding device,
The winding film of the multi-film near both ends of the spindle.
The flange members that define the
The flange member installed near the end on one side of the main shaft is
Removable with respect to the spindle, the spindle rotates when mounted.
When it is rotated, it is rotated together and installed near the other end.
The member is integrally attached to the main shaft.
It In this case, more specifically, the length of the main shaft is
With a hexagonal cross section over most of the direction, said one side
The flange member located near the end of is attached to the boss member.
And the boss member has a hexagonal cross section of the main shaft.
It is fitted in place.

In addition, in the above winding device, as a desirable mode, the winding shaft constituting member reduces the diameter of the winding shaft by moving a predetermined distance from the expanded position at the time of winding to one side, A support member that restricts the movement of each winding shaft constituent member from the expanded position to the other side is installed, and further,
A support member for supporting each winding shaft constituting member at the expanded diameter position is detachably attached to the one end of the main shaft, and the one end of the main shaft is supported by a removable bearing.
In that case, at one end of the spindle, the support member is integrally attached to a boss member that is detachably fixed to the spindle by a stopper, and the outer periphery of the boss member is rotatably supported by a bearing. The bearing can be detachably attached to the boss member.

Further, in the above case, the inner diameter side (main shaft side) is supported at the inner position of the support member attached to the one end of the main shaft, corresponding to each winding shaft constituting member in the expanded diameter position. It is desirable that the roller be rotatably installed in the direction of the main shaft and be removable from the main shaft. It is also possible to attach this roller to the above-mentioned supporting member and to make it detachable with respect to the main shaft together with the supporting member. Alternatively, a roller is installed rotatably in the direction of the main shaft at one end of the winding shaft constituting member, and the roller is located inside the support member attached to the one end of the main shaft at an expanded position. A cylindrical support for supporting the rollers of each winding shaft constituting member on the inner diameter side may be provided and may be detachable from the main shaft. It is also possible to attach this cylindrical support to the above-mentioned support member and to make it detachable with respect to the main shaft together with the support member.

Then, flange members for defining both sides of the winding of the mulch film can be further installed near both ends of the main shaft. In that case, the flange member installed on the one side is also installed detachably with respect to the main shaft at a position inside the support member, and the flange member has a hole into which the end of the winding shaft constituting member can be loosely fitted. It is good to form. The flange member and the support member may be integrated so that the support member, the flange member and the roller (or the support) can be simultaneously attached to and detached from the main shaft. When a support member that restricts the movement of each winding shaft constituent member from the expanded position to the other side is installed at the other end of the main shaft, the flange member installed on the other side is located inside the support member. The flange member may be provided with a hole into which the end of the winding shaft component can be loosely fitted.

Further, it is desirable that the winding device be provided with a mounting means for mounting a string or the like along the winding shaft so that the wound roll-shaped mulch film can be bound as it is. This mounting means may be installed or formed on both the flange members, for example.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described more specifically with reference to FIGS. First, the mulch film stripping device shown in FIGS. 1 and 2 has a pair of front wheels 1, 1
And a trolley 3 which includes the rear wheels 2 and 2 and travels independently over a ridge covered with a multi-film, a winding device 4 for the multi-film F installed on the rear side of the trolley 3, and a winding device 4 are driven to rotate. The engine 5, the power transmission mechanism 6 for transmitting the driving force of the engine 5 to the winding device 4, the swing roller 7 installed above the front side of the winding device 4, and the swing force of the engine 5 to move the swing roller 7 up and down. Swinging mechanism 8 that swings back and forth to
It comprises a stop device 9 and the like installed on the front side of the swing roller 7.

The power transmission mechanism 6 comprises a speed reducer 11, a sprocket 12, a chain 13, and a sprocket 14.
The driving force of the engine 5 is transmitted to the main shaft of the winding device 4 described later. The swing mechanism 8 includes a crank mechanism 15, a transmission rod 16, which is driven by the engine 5 via a speed reducer 11.
A swing shaft 19 having both ends axially supported by bearings 18 fixed to a pair of brackets 17, and a plate member 2 fixed near both ends of the swing shaft 19 and having both ends axially supporting both ends of the swing roller 7.
1a, 21b, etc., and the upper end portion 16a of the transmission rod 16 is axially supported by the rearward extension of one plate member 21a,
The rotation of the crank mechanism 15 causes the transmission rod 16 to move up and down, and the plate member 21a (and 21b) moves to the swing shaft 19 (bearing 1
8), and the rocking roller 7 also rocks up and down. It is desirable that the swing roller 7 is located immediately above the axis of the rear wheel 2 or in the vicinity of the front side thereof. This is to reduce the load applied to the front wheels 1 to facilitate the forward movement of the carriage 3 as described above. According to the experiment in the field, the angle (θ) formed by the straight line passing through the axis of the rear wheel 2 and the axis of the rocking roller 7 and the vertical line passing through the axis of the rear wheel 2 is about 15 forward.
When it is within the degree, the trolley 3 does not slip in the front wheel 1 relatively
Advanced. Therefore, this serves as a guide for the installation position of the swing roller 7.

The stop device 9 is a plate member 2 rotatably supported by a pair of brackets 22, 22 on the carriage 3.
3, a detection roller 24 rotatably supported on the upper end of the plate member 23, a transmission wire 25 attached to the lower end of the plate member 23, and the like. The transmission wire 25 is normally at the position shown by the urging force of a spring (not shown), and the plate member 23 is upright, but a backward load is applied to the detection roller 24 and the plate member 23 is inclined rearward (in FIG. 1). When turned clockwise, the transmission wire 25 is pulled forward against the urging force of the spring, and this acts on an accelerator lever (not shown) of the engine 5 to pull it back to the low rotation side and stop the rotation of the winding device 4.

Therefore, the mulch film F is not easily peeled off, while the winding operation is continued to move the carriage 3 forward and the pulling angle (δ) of the mulch film F gradually increases (= the mulch film F descends). In such a case, the detection roller 24 is pushed backward by the multi-film F, the plate member 23 is inclined backward, the engine 5 is rotated at a low speed via the transmission wire 25, and the rotation of the winding device 4 is stopped. The tension applied to the multi-film F does not increase any more, and cutting is prevented. When the rotation of the winding device 4 is stopped, the mulch film F may be manually peeled to some extent, and the winding by this device may be started again.

As shown in FIGS. 3 to 5, the winding device 4 has a main shaft 27 in which a left end portion (left in FIG. 3, the same applies hereinafter) is supported by a bearing 26 fixed at a predetermined position on the carriage 3. ,
A plurality of (six in this example) are arranged in parallel along the main shaft 27 on a concentric circle around the main shaft 27, and the winding shaft constituting member 28 and the main shaft 27 which rotate together with the main shaft 27 to form a winding shaft. A boss member 29 that is detachably fitted to the right end portion (right in FIG. 3, hereinafter the same) in the axial direction, and a screw member that is screwed onto the end of the main shaft 27 and that fixes the boss member 29 to the main shaft 27. 31 and a bearing 32 and the like, which is fitted to the outer periphery of the boss member 29 in a detachable manner in the axial direction and rotatably supports the right end portion of the main shaft 27 via the boss member 29.

A support plate 33 and a flange member 34 are integrally attached to the inside of the bearing 26 at the left end of the main shaft 27, and a support plate 35 and a flange member 36 are also integrally attached to the outer periphery of the boss member 29. Each of the flange members 34 and 36 includes a flange plate 37 and 38, and a plurality of spoke portions 39 and 40 attached to the outer periphery thereof.
And flange rings 41, 4 attached to their outer peripheral positions
It consists of two. A roller 43 is attached to the inside of the flange plate 38 via a bracket 44 corresponding to each winding shaft constituting member 28, and is rotatable in the direction of the main shaft 27.

The winding shaft constituting member 28 is linked to a bracket 45 attached to the outer periphery of the main shaft 27 by links 46 and 4, respectively.
6 (which forms a so-called parallel link mechanism), and the main shaft 2 is held in parallel with the main shaft 27.
7, the link 46, 46 swings by a predetermined distance (with the links 46, 46 swinging), and accordingly, the main shaft can be moved closer to or away from the main shaft by a predetermined distance. The main shaft 27 has a hexagonal cross-sectional shape as shown in FIG. 4 over most of the lengthwise direction (the central region sandwiched between the flange plates 37 and 38). Therefore, the boss member 29 is non-rotatably fixed to the main shaft 27. In the unloaded state, each winding shaft constituting member 28 is urged by the spring 47 to separate from the main shaft 27 (swing to the left) as shown in FIG. 3, and its left end is a hole 37 a formed in the flange plate 37.
To contact the support plate 33, and further movement is restricted. On the other hand, when the boss member 29 is fixed to the main shaft 27, the right end of each winding shaft constituting member 28 passes through the hole 38a formed in the flange plate 38 and abuts on the support plate 35, and is supported at that position. The roller 43 is installed so that its inner diameter side faces the hole 38a. In this way, when each winding shaft constituting member 28 is positioned and supported at the expanded diameter position, the links 46, 46 are not perpendicular to the main shaft 27, but are slightly inclined to the right (the boss member 29 side).

The bearing 32 is rotatably attached via a pair of pins 51 to a frame 49 which is swingably supported on the carriage 3 about the support portion 48. Bearing 3
2 fits into the boss member 29 or swings around the support portion 48 when it is pulled out, but since it is rotatably attached via the pin 51, it can always be kept parallel to the boss member 29. , There is no problem in putting on and taking off. Further, the spoke portions 39, 40 of both the flange members 34, 36 are provided with a locking piece 52 for mounting the string S for binding the roll-shaped multi-film, and the flange plate 37,
A notch 53 that reaches the hole 37a or 38a is provided around 38.

At the time of winding the multi-film, the boss member 29 is fitted from the right end of the main shaft 27 while the left end of each winding shaft constituting member 28 is brought into contact with and supported by the support plate 33 as described above. Then, the right end of each winding shaft constituting member 28 slides on the corresponding roller 43, passes through the hole 38a formed in the flange plate 38, and contacts the support plate 35. Next, the frame 49 is raised, the bearing 32 is fitted to the boss member 29 from the outside, and the retaining member 31 is screwed into the right end of the main shaft 27 while holding the handle 54.
Is fixed to the main shaft 27, and at the same time, the bearing 32 is held in the fitting position. As a result, the left end of the main shaft 27 is rotatably supported by the bearing 26, and the right end thereof is rotatably supported by the bearing 32 via the boss member 29. Further, each winding shaft constituting member 28 has support plates 33, 35 at both ends.
Is supported by the roller 43 and maintains its position, and the inner diameter side (main shaft side) is supported by the roller 43, which constitutes the winding shaft (rotation shaft around which the multi-film is wound) of the present apparatus. The winding shaft rotates together with the flange members 34 and 35. Furthermore, the string S for binding the mulch film wound into a roll is preset. Specifically, the string S is hung around the plurality of locking pieces 52 on the flange members 34 and 36 on both sides, and the notches 53 and the holes 37 are provided.
Winding shaft (winding shaft constituting member 28) through a and 38a
Crawl along.

When winding the mulch film, the carriage 3 is placed across the ridges covered with the mulch film, first the end of the mulch film is manually peeled off, the swing roller 7 is passed through, and the winding shaft forming member is placed. It winds around the winding shaft constituted by 28 so as not to come off, and the driving force of the engine 5 is transmitted to this winding device. When the main shaft 27 rotates and the winding of the multi-film F starts, the tension applied to the multi-film F and the rocking action of the rocking roller 7 cause the multi-film F to be peeled off from the ridges and at the same time the attached soil is removed. On the other hand, the carriage 3 is pulled by the tension applied to the mulch film F and automatically moves forward, during which the operator does not have to stick the peeling device.

If there is a portion where the peeling of the multi-film F does not go smoothly, the winding is still continued at that point, so that only the carriage 3 advances and the inclination angle δ of the multi-film F is increased. Grows larger. As the inclination angle δ increases, the component of the force acting on the peeling increases even with the same tension.
May come to peel again. In that case, the inclination angle δ returns to the original, but when the multi-film F is not peeled off, the inclination angle δ gradually increases (the multi-film F descends), and finally the multi-film F moves the detection roller 24 backward. Will be pushed. As a result, the accelerator lever of the engine 5 is pulled back to the low rotation range, the rotation of the winding device 4 is stopped, and the forward movement of the carriage 3 is stopped. If the inclination angle δ is too large, the load applied to the front wheels 1 will be large, and it will be difficult for the carriage 3 to move forward,
Although the tension applied to the multi-film F becomes large and the multi-film F is easily cut, the stopping device 9 automatically prevents the multi-film F from being cut. When the trolley 3 is stopped, it is advisable for the operator to operate the device again by removing the hard soil.

When the winding of the multi-film F is completed,
The strap S is removed from the locking piece 52, the multi-film wound into a roll is bound, and then the handle 54 is turned to remove the retaining member 31 from the main shaft 27, and the frame 49 is tilted outward to boss the bearing 32. It is pulled out from the member 29, and the boss member 29 is pulled out from the main shaft 27. At the same time, the support plate 35 and the roller 43 are also pulled out, so that the parallel link mechanism naturally falls to the right side due to the compressive force in the diameter reducing direction of the multi-film wound around the respective winding shaft constituting members 28 in the radial direction ( Alternatively, further pulling the mulch film to the right and tilting it down), the diameter of the winding shaft constituted by each winding shaft constituting member 28 is similarly reduced over the entire length, and the roll-shaped mulch film can be easily pulled out. You can

Since the support member 33 supports the link 46 at a position slightly inclined to the right, the parallel link mechanism is biased so as to tilt to the right when a compressive load is applied in the radial contraction direction, so that each winding The shaft constituting member 28 is a supporting plate 35.
And the roller 43. Although the pressing load on the support plate 35 is a load that pushes the boss member 29 to the right side, the pressing load is received by the retaining member 31, and the thrust load is not applied to the bearing 32 during the winding operation. Further, since the roller 43 shares and receives the compression load, the pressing load applied to the retaining member 31 by the boss member 29 is reduced, and the retaining member 31 can be easily removed from the main shaft 27 (there is no roller 43). When,
This pressing load is increased, and the retaining member 31 is prevented from coming off by frictional force.
May not turn). With this roller 43,
It is desirable to share and receive most of the compressive load. Even in that case, since the roller 43 is rotatable in the direction of the main shaft 27 (the direction in which the boss member 29 is removed), the removal can be performed easily.

In addition, since the inner diameter of the roll-shaped mulch film is further reduced after being taken out and the inner hollow portion is crushed, it is difficult to pass the string through the inner hollow portion after taking out. Since the string is set and the string passes through the inner hollow part, it can be easily tied and is convenient to carry. It is possible to tie the outer circumference of the roll-shaped mulch film after pulling it out without passing the string through the inner hollow portion, but in that case, it becomes difficult to carry.

6 to 8 show another winding device 64 according to the present invention (a portion corresponding to the winding device 4 is given the same number, and other portions are given different numbers. ing). The main difference from the winding device 4 will be described. In the winding device 64, a roller 28a is installed at the right end of the winding shaft constituting member 28 so as to be rotatable in the direction of the main shaft 27, and A short cylindrical support body 65 that supports the roller 28a on the inner diameter side is fixed to the support plate 35 when 28 is in the expanded position, and its center coincides with the axis of the main shaft 27. The peripheral surface of the support body 65 is chamfered at the tip side (left side) and inclined toward the inner diameter side, the flange plate 38 is attached to the outer periphery thereof, and the holes 38a are arranged at six equal intervals along the outer periphery of the support body 65. Is formed in. The winding shaft constituting member 28 (including the roller 28a) passes through this hole 38a, and the roller 28a rolls on the support body 65 and contacts the support plate 35.

On the inner diameter side of the support body 65, a hollow dish-shaped locking body 66 is attached to the support plate 35. Grooves 66a are formed inside the locking body 66 at six positions at equal intervals, and a part of the bracket 45 attached to a sleeve 68 (fixed to the outer circumference of the main shaft 27 by a pin 68) is formed in the groove 66a. It is fitted in, and thereby the rotational force of the main shaft 27 is transmitted to the support plate 35, the boss member 29, etc., and both are rotated. Other differences are that the main shaft 27 is pipe-shaped, the boss member 29 is not directly engaged with the main shaft 27, and the left bracket 45 is also attached to the sleeve 70 fixed to the outer periphery of the main shaft 27 by a pin 69. The left side support plate 33 has an annular shape and is fixed to the spoke portion 39, and the notches 53 formed in the flange plates 37 and 38 do not reach the holes 37a and 38a. However, other configurations and operations are substantially the same as those of the winding device 4.

FIG. 8 shows a state in which after removing the mulch film, the retaining member 31 is removed, the frame 49 is tilted outward, the bearing 32 is removed from the boss member 29, and the boss member 29 is removed from the main shaft 27. Is shown. In the process of extracting the boss member 29 from the main shaft 27, the boss member 2
9. Support plate 35 and support body 65 integrally attached to 9
Is also taken out at the same time, the roller 28a is supported by the support member 65.
When the roller 28a rolls relatively to the left on the outer periphery of the roller 28a and is disengaged from the support body 65, due to the compressive force in the diameter reducing direction of the mulch film multiply wound around each winding shaft constituting member 28, The parallel link mechanism is naturally tilted to the right (or is further tilted by pulling it to the right while holding the mulch film), and the diameter of the winding shaft constituted by each winding shaft constituting member 28 is similarly reduced over the entire length.

[0029]

According to the present invention, the mulch film wound into a roll can be easily taken out from the winding shaft. In addition, setting a string or the like in advance makes it easy to bind the multi-film wound in a roll.

[Brief description of drawings]

FIG. 1 is a side view of a multi-film stripping device.

FIG. 2 is a plan view thereof (a conceptual diagram showing a winding device in which a winding shaft constituting member is partially omitted).

FIG. 3 is a cross-sectional view of a winding device according to the present invention.

FIG. 4 is a sectional view taken along the line I-I.

FIG. 5 is a side view (a) and a part (b) of a front view.

FIG. 6 is a cross-sectional view of another winding device according to the present invention.

FIG. 7 is a sectional view taken along the line II-II.

FIG. 8 is a diagram showing how the boss member is extracted in the winding device.

[Explanation of symbols]

4 Winding device 26 Bearing 27 Spindle 28 Winding shaft components 28a roller 29 Boss member 31 retaining member 32 bearings 33, 35 support members 34, 36 Flange member 37, 38 Flange plate 37a, 38a holes 43 Roller 46 links 52 Locking piece 53 Notches 65 Support F multi film S string

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yasuyuki Okatake             Minoru 447 Shimo-shi, Sanyo-cho, Akaban-gun, Okayama Prefecture             Sangyo Co., Ltd.

Claims (9)

[Claims] 1. A winding device used in a multi-film stripping device for stripping a multi-film from a ridge covered with the multi-film, the main shaft being rotationally driven by a drive source, and the main shaft on a concentric circle around the main shaft. A plurality of winding shaft constituent members that are arranged in parallel with each other and that rotate together with the main shaft to form a winding shaft. A multi-film winding device, wherein the diameter of the winding shaft is reduced by moving a predetermined distance along the main axis to one side while maintaining the parallelism. 2. The winding shaft constituting member is attached to the main shaft via a link which constitutes a parallel link mechanism together with the winding shaft constituting member, according to claim 1. Multi film take-up device. 3. The link constituting the parallel link mechanism is inclined to one side when each of the winding shaft constituting members is positioned at the expanded diameter position at the time of winding. Multi-film winding device. 4. The main axis is 6 over most of the length direction.
4. A prism having a rectangular cross section, and the parallel link mechanism is installed on each plane of the main shaft.
The multi-film winding device described in. 5. A flange member that defines both sides of winding of the multi-film is installed near both ends of the main shaft, and when each of the winding shaft constituent members is positioned at a diameter expansion position during winding, each winding shaft The multi-film winding device according to any one of claims 1 to 4, wherein both ends of the constituent member are located at positions passing through the respective flange members. 6. The main shaft is supported at one end by a removable bearing and at the other end by a fixed bearing, whereby the main shaft is supported from the one end by a bearing. Is removed, the bearing is supported by the bearing of the other end together with the winding shaft constituent member, and a power transmission mechanism is connected to the other end. The multi-film winding device according to any one of claims 1 to 5. 7. The multi-film winding device according to claim 6, wherein the detachable bearing is attached to a frame which is swingable around a support portion. . 8. A flange member for defining both sides of winding of the multi-film is installed near both ends of the main shaft, and the flange member installed near one end of the main shaft is detachable from the main shaft. The flange member that rotates together with the main shaft when mounted and that is installed near the other end is integrally attached to the main shaft. The multi-film winding device described in 1. 9. The main shaft has a hexagonal cross section over most of its length, a flange member located near the end on the one side is attached to a boss member, and the boss member has a hexagonal shape. The multi-film winding device according to claim 8, wherein the multi-film winding device is fitted in a rectangular cross section.