JPS61244494A - Web cutter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a web cutting device used to cut a web or the like into a predetermined width.

[Conventional technology]

As a cutting device for cutting a web into a predetermined width, a pair of upper and lower cutting blades is provided so as to be movable in the axial direction of a rotating shaft, and each pair of upper and lower cutting blades is moved in the axial direction of the rotating shaft. A web cutting device is known in which the blade interval can be set according to a predetermined web cutting width.

Furthermore, when cutting the web, both edges of the web are supported by the lower blades, but the weight of the web causes it to bend. Such web sagging and wrinkles result in inaccurate width dimensions of the cut web even if the cutting blade interval is set to accurately match the web cutting width. In particular, the bends and wrinkles that occur near the cutting blade also cause linear scratches to be left on the surface of the web by the lower blade.

In order to prevent the web from bending or wrinkling due to its own weight, conventional methods have been to use a fixed web presser roll or a narrow spacer installed adjacent to the lower blade to hold the web. It was supported and cut (for example, Japanese Patent Application Laid-Open No. 57-163012, Japanese Utility Model Application No. 58-13920).

[Problem that the invention seeks to solve]

However, in the conventional web cutting device described above, although it is fine when the width of the web to be cut is small, when the cutting blade is moved to increase the blade spacing in order to cut a web with a large width, the relative Because the web support width becomes smaller, the web being cut becomes sagging or wrinkled in the width direction, making it impossible to cut the web correctly at a predetermined cutting width.

Further, if the web to be cut is bent or wrinkled, there is a problem in that scratch marks are generated on the web surface at the edge portions of the web supporting rolls and spacers.

The present invention solves the above-mentioned problems of web cutting devices that use a fixed web presser roll or a narrow spacer provided adjacent to a lower blade to support and cut the web. An object of the present invention is to provide a web cutting device capable of supporting a web over its entire width even if the blade spacing of the cutting blades is changed without impairing the blade spacing setting function of the cutting blades.

[Means for solving problems]

In order to solve the above problems, the present invention provides a pair of cutting blades on each of the upper and lower rotating shafts, and makes the cutting blades movable so that the blade spacing can be changed freely. These movable spacers are connected and installed, and these movable spacers are integrated in the rotational direction with respect to the lower rotating shaft and made movable relative to the axial direction, so as to match the width of the web to be cut. When the blade spacing is set by moving the upper and lower pairs of cutting blades, the movable spacer simultaneously moves in the axial direction, changing the spacing between the movable spacers so that the web to be cut is always supported over its entire width. It was made so that it could be done.

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

〔Example〕

In FIG. 1 showing the main parts of the web cutting device, the web cutting device includes a pair of fixed left and right slide guides 11L.
, 11R are provided, and this slide guide ILL
, IIR have movable frames 14L and 14R, respectively.
is slidably supported. This movable frame 14L
, 14R rotatably support a pair of upper and lower rotating shafts 15 and 16, respectively. These rotating shafts 15,16 are axially separably connected. In the illustrated embodiment, these rotating shafts 15, 16 are separably connected by a spline connection, and a rotating shaft 15L has spline shafts 15S, 15S with multiple keys cut at equal intervals around the circumference.
, 16L, and a boss-side rotating shaft 1 in which a groove is cut into which the spline shafts 15S and 16S fit so that they can move in the axial direction.
It consists of 5L and 15R.

The rotating shaft 15.16 and the cutting blade 22.24 are integrated in the rotational direction by a spline connection, and are connected movably to each other in the axial direction. As can be seen from FIG. 1, which is partially shown in cross section, the rotating shafts 15.16 are spline-coupled by slidably fitting into the grooves 15M and 16M cut in the rotating shafts 15.16. Keys 26.2 that make up
Sleeves 17, 18 with 7 are fitted in each case.

The sleeves 17, 18 are fitted and fixed to bearings 19, 20 fixedly provided inside the movable frame 14L, respectively. An outer spacer 21 having a small diameter portion is coupled to the sleeve 17 spline-coupled to the upper rotating shaft 15, and an upper cutting blade 22 is fitted into the small diameter portion.

The upper cutting blade 22 is further connected to the outer spacer 21 by an inner spacer 23 screwed onto the sleeve 17 from the inside.
is crimped and fixed to the side of the In order to prevent the outer and inner spacers 21, 23 from loosening, a crimp ring 24 is screwed onto the sleeve, and the upper cutting blade 22 is integrated with the sleeve 17 splined to the upper rotating shaft 15.

On the other hand, a lower cutting blade 24 and a fixed spacer 25 are screwed into the sleeve 18 spline-coupled to the lower rotating shaft 16, and these act like a double nut and are tightened together and integrated.

The other end side of each of the upper and lower rotating shafts 15 and 16 is connected to the other movable frame 14 in exactly the same manner as the structure already described in detail.
The cutting blade 22.R is rotatably supported by the cutting blade 22.R.
24 have a completely similar structure and are integrally attached to sleeves splined to the rotating shafts 15 and 16, respectively.

A plurality of movable spacers 30 are further attached to the lower rotating shaft 16. These movable spacers 30 are movable in the axial direction, but in the rotational direction, the lower rotating shaft 1
6, and the movable spacers 20 are connected to each other so that they can expand and contract in the axial direction.

FIG. 2 shows the structure of the movable spacer 30 and the expandable connection structure. A spacer ring 31 has a rubber lining 33 having a predetermined curved surface on both sides of the outer surface, and a sleeve 32 that extends in the axial direction. We are prepared. This sleeve 32 is fitted into the lower rotating ring 16 so as to be slidable in the axial direction. The sleeve 32 is further provided with a tip engagement flange 35 at its tip. Also, spacer ring 3
1, the rear end engagement flange 36 extending downward on the opposite side of the sleeve 32 engages with the front end engagement flange 35 of the adjacent movable spacer 30 on the inside. in this way,
The plurality of movable spacers 30 are connected as a whole so that they can expand and contract in the axial direction.

A keyway 34 is formed in the boss portion of the sleeve 32, and the movable spacer 30 and The lower rotational axle load 6 is relatively movable in the axial direction and is coupled to be integrated in the rotational direction.

Near the bases of the movable frames 14L and 14R, a support member 12 fixed to the main body of the device near the center
Threaded portions 13L and 13R of the feed shaft 13, which are supported so as to be rotatable but not axially movable, are screwed together. The threaded portions 13L, 13R are formed with threads running in opposite directions, and as the feed shaft 13 rotates, the movable frames 14L, 14R are moved in opposite directions. The gear indicated by the reference numeral 1 in FIG. 1 is connected to a well-known drive device (not shown).
When driven to rotate, the driving force is applied to each rotating shaft 15.
16 through gears 2 and 3 fixed to these shafts, causing the rotating shafts 15 and 16 to rotate at equal speeds in mutually opposite directions. Further, the reference numeral 4 indicates the web to be cut.

In the web cutting device of the present invention configured as described above, when the feed shaft 13 is rotated in one direction by a well-known transmission drive mechanism or by manual operation, the feed shaft 1
The movable frames 14L and 14R are connected to the slide guide 11 through screws 13L and 13R formed on both sides of the slide guide 11, respectively.
They are guided by the movable frames 14L and 11R and moved toward each other. Upper and lower cutting blades 22.24 are fixed to the movable frames 14L and 14R via sleeves 17.18, respectively. .24 is the rotation axis 15.16
The cutting blade is moved in the axial direction through the spline connection structure between the cutting blades, and the gap between the upper and lower cutting blades is shortened. Thereby, the web cutting width can be set smaller than the web cutting width shown in FIG.

Since a plurality of movable spacers 30 connected to a fixed spacer 25 are connected to each other and movable in the axial direction on the lower rotating shaft 16, the lower cutting blades 24, 24 are moved in the axial direction. When the blade interval is shortened, each movable spacer 3° moves in a direction to shorten the spacer interval while moving relative to the rotating shaft 16. As a result of the movement of each movable spacer 30, the intervals between each movable spacer are not necessarily equal and constant, but the movable spacer 3o is distributed over the entire width between the shortened blade widths. Become.

In this way, each pair of upper and lower cutting blades 22L.

At a position where the blade intervals of 22R, 24L, and 24R exactly match the width dimension of the web to be cut,
By fixing and holding 14R with a well-known locking mechanism (not shown) or the like, the cutting blades are set at a predetermined blade interval.

On the other hand, when setting the blade interval to a larger web cutting width dimension, the operation described above is reversed. In this case, the movable spacer 3° moves as described above in the direction of increasing the distance between the spacers and extends as a whole, but the movable spacer 3° partially extends between the front end engaging flange 3′5 of the adjacent movable spacer 30 and the rear end. There is also a portion where the engagement flange 36 is pulled and moved while being engaged.

After the blade spacing between the upper and lower pairs of cutting blades is set, a known drive device (not shown) is started to rotate the upper and lower rotating shafts 15.1.
When the web 4 is rotated, the web 4 is supported by a plurality of movable spacers 30 distributed over its width, and the upper and lower pairs of cutting blades 22L, 22R, 24L, 24
Cut along the side edges by R.

The web cutting device of the present invention described above is applicable not only to cutting webs of photographic film, paper, textiles, etc. and side trimming thereof, but also to cutting devices, slitting devices, side trimmer devices, etc. for thin steel plates, etc. In this case, the same effects as those described below can be obtained.

〔Effect of the invention〕

The present invention having the above configuration has a pair of upper and lower cutting blades that are integrated in the rotational direction of the pair of upper and lower rotating shafts and are movable in the axial direction, so that the spacing between the cutting blades can be freely changed. , the lower rotating shaft is provided with a plurality of spacers connected to each other so as to be movable in the axial direction, the spacers and the lower rotating shaft are integrated in the rotating direction and are relatively movable in the axial direction, Since the spacer spacing changes according to the setting movement of the blade spacing, the web to be cut will be cut across the entire web width regardless of the size of the cutting width, that is, regardless of the position of the cutting blade. can be supported. Therefore, the web does not bend or wrinkle due to its own weight, and the web can be cut with high dimensional accuracy. Further, since no bending or wrinkles occur near the lower cutting blade, scratch marks on the surface of the web due to the lower cutting blade are eliminated.

[Brief explanation of drawings]

FIG. 1 is a partially sectional front view showing the main parts of the web cutting device of the present invention. FIG. 2 is a sectional view of the movable spacer. 14L, 14R...Movable frame 15.16...Rotary shaft 22...Upper cutting blade 24...Lower cutting blade 30...Movable spacer.

Claims (5)

[Claims] (1) In a cutting device in which the blade spacing between the upper and lower pairs of cutting blades can be set according to the width of the web to be cut, a plurality of movable spacers are attached to the lower rotating shaft to which the pair of lower cutting blades are attached. A web cutting device characterized in that the movable spacers are integrated in the rotational direction with respect to a lower rotating shaft and are configured to be movable relative to the axial direction. (2) The web cutting device according to claim 1, wherein the plurality of movable spacers are connected so as to be relatively movable. (3) The web cutting device according to claim 2, wherein the upper and lower pairs of cutting blades are rotatably mounted on a pair of movable frames each guided by a fixed slide guide. (4) The web cutting device according to claim 3, wherein the plurality of movable spacers are connected to the pair of movable frames via fixed spacers. (5) The movable spacer and the lower rotating shaft are integrated in the rotational direction by a spline key interposed therebetween;
5. The web cutting device according to claim 4, wherein the web cutting device is coupled to allow relative movement in the axial direction.