JPH0724220Y2 - Blade edge stabilization mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a blade edge stabilizing mechanism of a trimming device attached to a manufacturing device for a band-shaped material such as a film.

(Prior Art) FIGS. 4 and 5 show a conventional general trimming device (in-air cutting) used in a device for manufacturing a band-shaped material such as a film. In the figure, the film 1 is intermediate between the feed roll 2 and the next feed roll 3, and the blades 4 trim the portions of the film with uneven thickness at both edges. Reference numeral 5 is a disk-shaped blade holder to which a plurality of spare blades are attached, which is attached to the arm 7. When changing the blade, loosen the attachment and turn the blade to change the position of the blade, then tighten and re-attach to the arm 7. Fix it. 6 is a safety cover.

Reference numeral 8 denotes a rotation shaft when the blade holder 5 moves away from the trimming position, and is connected to the arm 7. Further, the rotary shaft 8 is adapted to rotate by being fitted into a bearing provided on the upper end of the moving arm 10. An arm 9 is fixedly attached to the rotary shaft 8, and the tip of the rod of the pneumatic cylinder 11 is pivotally attached to the end of the arm 9 by a pin. The cylinder side of the pneumatic cylinder 11 is pivotally attached to the moving arm 10 using a pin. In addition, the moving arm 10 is a stand 14
4 small wheels 15 are attached to the base 14. A V-shaped groove is made on the outer circumference of the small wheel 15,
A plate-shaped guide 16 attached to a base 17 is sandwiched from both sides and slid. A screw shaft 13 and a nut 12 are fixed to the moving arm 10. 18 is the screw shaft
It is a manual handle that turns 13.

In FIGS. 4 and 5, while the film 1 is being fed, compressed air is fed into the pneumatic cylinder 11 to push up the arm 9 to rotate the rotary shaft 8 connected thereto. , Raise the blade holder 5 and keep the blade 4 away from the film surface. Next, the handle 18 is turned to move the moving arm 10 to determine the position of the blade 4 in accordance with the trimming size on the film 1 (not shown, a pointer is attached to the base 14 and the base 17 is scaled to the corresponding position). You can check the position of the blade by attaching a plate). Next, the pneumatic cylinder 11 is operated in reverse, and the blade 4 is set at the film trimming position.

(Problems to be solved by the invention) In the conventional trimming device, there is a play (play) in the moving mechanism (guide mechanism and moving screw) of the device, and there is also a play in the shaft of the blade holder arm. However, there is a possibility that the blade portion may vibrate due to the frictional resistance of the film cutting, causing chattering. When chattering is caused in this way, there are problems that the edges of the cut film are not aligned or the film has a break.

The present invention has been proposed to solve the above conventional problems.

(Means for Solving the Problems) Therefore, the present invention, in the trimming device for cutting the unevenness of both edges of the film before winding the film on the roll by the take-up device of the film manufacturing device, etc., rotates the blade holder for film cutting. A disc spring is installed to apply thrust force to the outer ring of the shaft rolling bearing to eliminate play in the bearing, and the blade holder on the rotating shaft is always subjected to axial force to allow play between the holder and blade. A disc spring other than the above is provided, which serves as a means for solving the problem.

(Function) A disc spring applies a force in the thrust direction to the outer ring of the rolling bearing of the rotary shaft of the holder for the film cutting blade to eliminate bearing play, and the blade holder on the rotary shaft also has a disc spring. Thus, by constantly applying a force in the axial direction, the blade holder and the blade play can be removed to stabilize the blade during the film trimming operation, and at the same time, the film cutting position can be correctly maintained even when the blade is switched to a spare blade.

(Embodiment) The present invention will be described below with reference to the embodiments of the drawings. Figs. 1 to 3 show an embodiment of the present invention, which is a trimming machine in which the present invention is applied to a take-up machine of a biaxially stretched film production line. It is an example of an apparatus. In the figure the film from the feed roll 22
While the 21 is being fed to the feed roll 23, a trimming blade
24 is installed, and the film 21 is cut by the blade 24 (cut in the air). The blade 24 'is a spare spare blade. Further, the blades 24 and 24 'are both attached to the blade holders 25 and 25', and the blade holders 25 and 25 'are attached to the shaft 26 so that they are fixed to the shaft 26 by set screws 57 and 57', respectively. It has become. Further, the blade 24 and the blade 24 'are placed on the same plane of rotation. An arm 29 is fixed to the shaft end of the shaft 26, and the free end of the arm 29 is connected to the tip of the rod of the pneumatic cylinder 30 by a pin 43.

Reference numeral 31,31 'is a frame that supports the ball bearings 27, 28 fitted to the shaft 26.The frames 31, 31' are attached to the bearing block of the niria guide 33, and the frame 31 has a pneumatic cylinder 30 Cylinders are pinned together. Reference numeral 32 denotes a base, to which a guideway of a linear guide 33 is attached. Bearing abutments 48 and 49 are attached to both ends of the base 32, and the bearing abutments 48 and 49 support a ball screw 34. . Ball screw 34
Nuts are attached to the frames 31, 31 '. 35
Is a handle for turning the ball screw 34, and 36 is a handle for locking. Further, a pointer 37 is attached below the frame 31, and a scale plate 38 is further attached to the base 32 so that the pointer 37 can confirm the moving amount and position of the frame by the scale of the scale plate 38.

FIG. 3 is a sectional view showing the structure near the shaft 26 in detail. As shown in FIG. 3, the outer ring of the ball bearing 27 has a frame 31 and a bearing lid 44.
The inner ring of the ball bearing 27 is fixed to the shoulder of the shaft 26 and the bearing nut 45. The outer ring of the ball bearing 28 is in the fitting hole of the frame 31 'and is not axially constrained, but the disc spring 39 is provided on one side and the stop ring 40 is provided on the outer side thereof.
Since the disc spring 39 is attached and the disc spring 39 is compressed and attached, the outer ring of the ball bearing 28 always receives thrust. The inner ring of the ball bearing 28 is fixed to the shaft 26 with a stop plate 46 and bolts 47. Therefore, the thrust of the disc spring 39 applied to the outer ring of the ball bearing 28 causes the ball of the ball bearing to the inner ring, the inner ring to the shaft 26, the shaft 26 to the inner ring of the ball bearing 27, and the ball of the ball bearing 27 to the outer ring. Working and play of ball bearings 27, 28 is completely eliminated. Also, the blade holders 25, 25 'fitted on the shaft 26
Also, a disc spring 42 and a snap ring 41 provided on the shaft constantly receive thrust. The blade holders 25, 25 'are thus completely free of axial play.

Next, the operation of the embodiment configured as described above will be described. By actuating the pneumatic cylinder 30 to pull in the rod, the blade 24 is separated from the film feeding position, and the film 21 is fed from the feed roll 22 to the feed roll 23. Wrap it around.
Next, turn the handle 35 to rotate the ball screw 34,
Since the frame 31 moves on the linear guide 33, the position of the blade 24 is adjusted to the trimming dimension of the film 21. The position can be confirmed by the scale 38 and the pointer 37. Next, the handle 35 is locked by the handle 36. Also pneumatic cylinder
30 is operated to move the blade 24 to the film cutting position.

Next, when changing the blade while the film 21 is being fed, the set screw 57 'which holds the blade holder 25' is loosened. Then, when the blade holder 25 'is rotated to move the blade 24' to the film cutting position, the holders 25, 25 'have no axial play, so that the blades 24, 24' are first set on the same rotating surface. The cutting line of the film is the same even when the blade 24 'is brought to the film cutting position. Then blade holder
Fix 25 'with set screw 57'. Then loosen the set screw 57, turn the blade holder 25 to separate the blade 24 from the film,
Secure the blade holder to the shaft 26 with the stop 57. As described above, there is no play between the shaft, bearing and frame during the film trimming operation and when the blade is replaced, so there is no vibration or blurring of the blade, the film cut surfaces are uniform, and the finish is good and there is no film breakage. No trouble will occur.

(Effects of the Invention) The present invention is configured as described above in detail, and a disc spring is inserted in the rolling bearing that supports the rotary shaft of the holder of the film cutting blade to eliminate the play of the bearing, and a plurality of blade holders are provided. Since it is pressed against one side by a disc spring on the shaft to eliminate the play, it is possible to stabilize the blade during trimming of the film, suppress vibration, and eliminate film breakage and unevenness. In addition, even if the cutting blade is changed, it can be set in the correct cutting position. As described above, according to the present invention, since there is no play between the shaft, the bearing and the frame during the film trimming operation and when the blade is replaced, there is no vibration or blur of the blade, and the film cut surface is even. The finish is also good,
Further, there is no defect that defects such as film breakage occur.

[Brief description of drawings]

1 is a side view of a film trimming apparatus showing an embodiment of the present invention, FIG. 2 is a view taken in the direction of arrow B of FIG. 1, FIG. 3 is an enlarged sectional view taken along line AA of FIG. 1, and FIG. FIG. 5 is a side view showing a conventional film trimming device, and FIG. 5 is a front view of the same. Description of the main parts of the figure 21 …… Film, 22,23 …… Roll 24,24 ′ …… Blade, 25,25 ′ …… Blade holder 26 …… Rotary shaft, 27,28 …… Rolling bearing 29 …… Arm , 30 …… Pneumatic cylinder 31,31 ′ …… Frame, 39 …… Disc spring 42 …… Disc spring

Claims (1)

[Scope of utility model registration request] 1. In a trimming device for cutting off unevenness of both edges of a film before winding the film on a roll by a take-up machine or the like of the film manufacturing device, a thrust direction is applied to an outer ring of a rolling bearing of a rotary shaft of a blade holder for film cutting. Is provided with a disc spring that eliminates the play of the bearing by applying the force of the above, and a disc spring that eliminates the play between the holder and the blade by constantly applying an axial force to the blade holder on the rotating shaft. Stable cutting edge stabilizing mechanism.