JPH0730302Y2 - Slitter device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial Application Field" The present invention relates to an improvement of a slitter device for cutting a strip-shaped sheet material such as a thin film filter or a magnetic tape into a predetermined width.

“Prior Art” In order to cut a thin film strip such as a film or a magnetic tape into a desired narrow width by sliding contact of a slitter knife consisting of a ring-shaped upper blade and a lower blade, a slitter device has a large number of rotary shafts. With regard to the slitter device that holds the blades fixed at required intervals, the conventional practice has been published in JP-B-60-29440 and JP-B-6.
There are various proposals such as No. 1-13268.

In the former technique, notches are provided at equal intervals around the center hole to step the upper blade G and the support surface A into which the center hole can be fitted, while the outermost peripheral surface extends toward the support surface side. -Shaped coil spring F is provided with a tapered surface B on which a taper surface B can be mounted, and an end groove on the side opposite to the taper surface is provided with a relief groove C. The web slitter is provided with a screw E which can be inserted into the clearance groove C and is positioned corresponding to the notch.

The latter technique is provided with stoppers E fixedly provided at a plurality of locations on the peripheral edge of the end surface of the small diameter ring portion A of the holder D, and a part of which protrudes outward from the outer peripheral surface of the small diameter ring portion A. A slitter knife G is provided with a plurality of notches larger than a part of the stopper E, and an escape groove C into which the stopper E is inserted is provided on the end surface of the large-diameter ring portion of the holder D. Is incorporated in the shaft, the knife G is temporarily fixed to the holder D with the elastic ring F set, and then the knife G is incorporated in the shaft.

In both cases, both of them are composed of a blade G in the central hole and a holder D for supporting the blade G, and the blade holder D projects from the supporting surface (or the small-diameter ring portion of the holder) A. A stopper E for temporarily fixing the blade G and the coil spring (or elastic ring) F is provided, and an escape groove C is provided at the other end surface of the holder D so that the head of the adjacent stopper E can be inserted. Cage,
It is an easy-to-assemble slitter device that specifies the interval between the blades G by axially mounting and fixing the holder unit to which the blades G are temporarily fixed.

[Problems to be Solved by the Invention] In the conventional device as described above, when cutting a sheet material into a predetermined tape width, the installation interval of the cutting blade is determined by the thickness of the holder. It has become a method. For example, when a video tape is cut and manufactured, its width is generally 12.7 mm, so the width of the holder used at this time is also 12.7 mm. If the holder is thick like this, a small screw such as a small screw as the stopper may be thicker than 2 mm, and the escape recess has a depth (3 mm or more) sufficient for the stopper head to enter. Can be formed as a hole or groove. However, if you try to cut and make a narrow audio tape (cut width less than 6 mm) or 8 mm video tape (cut width 8 mm), the holder will also be 6 mm.
You will have to use less than 8mm or less. In the case of a holder for cutting narrow tapes like this, the holder itself becomes thin, so when using a small screw (bamboo of its head is 2 mm or more) as a stopper, the depth of the relief recess is Since it is deeper than the thickness of the large diameter ring portion (3 mm or more), it becomes impossible to form a groove. For that purpose, as shown in FIGS. 12 to 15, a through hole H is provided at a position facing the head A of the adjacent stopper instead of the escape groove, and the through hole H is used as the escape hole of the E head of the stopper. It is necessary to But first
As shown in FIGS. 3, 14, and 15, this through hole H is inevitably a hole that partially covers the stepped portion I. Therefore, in the step portion I of the holder D, the inner peripheral surface of the hole and the peripheral side surface J of the small diameter ring portion are formed.
And form a pointed ridge line portion K having low strength. If there is a weak pointed ridge line portion K on the circumferential side surface J having a step as described above, which requires precision, it becomes difficult to perform cutting or finish grinding, and continuous processing cannot be performed, resulting in intermittent processing and a grinding tool. Remarkably shorten the life. In addition, if the peripheral side surface J has a hole having a weakly pointed ridgeline portion K, the cloth or the like may be caught when the blade D or the elastic ring F is attached to the holder D or when the holder D is cleaned with the cloth or the like. However, there is a problem in that the assembly accuracy may be deteriorated due to the adhesion and the like, and the worker's hand may be damaged in some cases. Furthermore, the head of the adjacent stopper E may hit the inner diameter of the thin blade.

The present invention is intended to solve the above-mentioned drawbacks. Even if the slitter knife unit including the thin holder D is used for the rotary shaft L, the temporary fixing method using the stopper E which is easy to assemble is adopted. A plurality of sets are fitted in the axial direction and can be attached in parallel so that the intervals of the blades become a predetermined width by pressing.

"Means for Solving the Problems" The present invention provides, as means for solving the above technical problems,
It is configured as follows.

A first invention to be patented is a ring-shaped thin blade, a holder for fittingly supporting the ring-shaped thin blade, a stopper for temporarily fixing the ring-shaped thin blade to the holder, and a bias for the ring-shaped thin blade toward the stopper of the holder. The present invention relates to a slitter device in which a plurality of slitter knife units each including an elastic member are attached in parallel in the axial direction of a rotary shaft.

The holder of the slitter knife unit has a step portion including a large diameter ring portion and a small diameter ring portion on the outer peripheral portion thereof, and is formed such that the left and right end surfaces in the radial direction of these ring portions are parallel to each other. Further, stoppers are attached to the end face of the holder of the slitter knife unit on the side of the small-diameter ring portion at several locations in the vicinity of the peripheral edge thereof, a part of which protrudes outward from the outer peripheral surface of the small-diameter ring portion. Further, an escape recess into which the stopper is inserted is formed on the end surface of the holder on the large-diameter ring portion side. Further, the ring-shaped thin blade is provided with a cutout portion on the inner peripheral edge thereof, which is larger than a part of the stopper formed to project and is arranged so that it can be fitted into a small-diameter ring portion. The ring-shaped thin blade is fitted to the small-diameter ring portion of the holder, and an elastic member for urging the ring-shaped thin blade to the stopper side of the holder is provided between the ring-shaped thin blade and the large-diameter ring portion. The slitter knife unit is temporarily fixed.

According to the present invention, a plurality of sets of slitter knife units, in which the ring-shaped thin blade fitted to the holder as described above is temporarily fixed by a stopper and an elastic member, are attached so as to be fitted and pressed in parallel in the axial direction of the rotary shaft. As a result, the ring-shaped thin blade is sandwiched between the elastic member and the end face of the holder of the adjacent slitter knife unit on the large-diameter ring side, and the distance between the adjacent ring-shaped thin blades and the ring-shaped thin blade is specified to be a predetermined width. This is an improvement of the slitter device characterized by the above.

The improvement of the present invention is, firstly, that a rivet mounting hole penetrating to the end surface of the small-diameter ring portion on the end surface of the holder on the small-diameter ring portion side is not exposed on the outer peripheral surface of the small-diameter ring portion. In addition to drilling, a rivet caulking recess should be formed in the opening on the end surface on the large diameter ring side.

Secondly, a semi-tubular flat rivet is inserted into the rivet mounting hole from the end surface on the small diameter ring side, and the hole at the tip of the flat rivet is fixed by caulking in the rivet caulking recess, and the head of the head is fixed. Part of the small diameter ring should protrude from the outer peripheral surface toward the outer peripheral side to form a stopper.

Thirdly, an escape recess into which the flat rivet head that forms the stopper is inserted is formed at a position corresponding to the stopper of the adjacent holder on the end surface of the large diameter ring portion side.

The present invention is a slitter device characterized by improving the above three components.

The second invention for receiving registration is the embodiment of the first invention, and when the holder is thinly formed, the relief recess formed on the end surface of the large-diameter ring portion side corresponds to the stopper of the adjacent holder. The slitter device is characterized in that the slitter device is formed at a position where it does not overlap with the front rivet mounting hole.

The third invention for receiving registration is another embodiment of the first invention, and when the holder is formed to be thick, a rivet caulking concave portion formed on the end surface of the large diameter ring portion side of the holder is adjacent to the holder. The slitter device is characterized in that it is formed in an escape recess provided at a position corresponding to the stopper.

That is, in the present invention, a semi-tubular flat rivet with a small head baffle to be caulked is used instead of the conventional small screw for temporary fixing, and the relief recess at the position for attaching the stopper for temporary fixing is not a through hole but a shallow hole. A hole or groove is not formed, and a hole having a pointed ridgeline portion with weak strength on the peripheral side surface is not exposed to improve difficult processing of the step portion, and
The present invention embodies a slitter knife unit that can be attached so that even a narrow holder for producing a narrow tape can be fitted and pressed in parallel in the axial direction of the rotary shaft without any trouble.

[Operation] When the present invention is used, first, a holder, a ring-shaped thin blade, a semi-tubular flat rivet that constitutes a stopper, and an elastic member are prepared. Then, a semi-tubular flat rivet is inserted into the rivet mounting hole of the holder from the end surface on the small diameter ring side, and the hole at the tip of the rivet is fixed by caulking it in the rivet caulking recess, and the head part The portion projects outward from the outer peripheral surface of the small diameter ring portion to form a stopper. Then, the elastic member and the ring-shaped thin blade are fitted to the small-diameter ring portion of the holder, and the ring-shaped thin blade is slightly rotated so that the notch of the ring-shaped thin blade does not coincide with the stopper so that the ring-shaped thin blade is locked to the stopper. At the same time, the ring-shaped thin blade is urged by the elastic member toward the stopper side of the holder to be temporarily fixed to form a slitter knife unit. Next, a plurality of slitter knife units in which the ring-shaped thin blades are temporarily fixed in this manner are fitted in parallel in the axial direction of the rotary shaft. At this time, the heads forming the protruding stoppers of the adjacent slitter knife units are fitted into the escape recesses of the adjacent holders, and then the plurality of parallel slitter knife units are pressed in the axial direction. . Then, the ring-shaped thin blade is clamped between the elastic member and the end surface of the holder of the adjacent slitter knife unit on the large-diameter ring portion side, and the gap between the adjacent ring-shaped thin blades and the ring-shaped thin blade is fixed while being fixed to a predetermined width. Complete the slitter device.

[Example] The present invention relates to a slitter device in which blades of super-hard thin blades are arranged at a predetermined interval for producing a film or a magnetic tape. In particular, it eliminates the processing difficulties that occur in the process of making narrow audio tapes (cut width less than 6 mm) and thin millimeter holders for 8 mm video tape (cut width less than 8 mm). Hereinafter, the present invention will be described in detail with reference to illustrated embodiments.

FIGS. 1 to 4 show the first embodiment, FIGS. 5 to 8 show the second embodiment, and FIG.
FIG. 10 and FIG. 10 show components common to both the embodiments.

In the figure, 1 is a ring-shaped thin blade having a hole in the center, 2 is a holder for fitting and supporting the ring-shaped thin blade 1, and 3 is the ring-shaped thin blade 1.
Is a stopper for temporarily fixing to the holder 2, and 4 is an elastic member for urging the ring-shaped thin blade 1 toward the stopper 3 of the holder 2. Then, these members are combined to form the slitter knife unit 5. Further, a plurality of the slitter knife units 5, 5 ′, 5 ″ ... are arranged in the axial direction of the rotary shaft 6,
The slitter devices are installed in parallel.

The holder 2 of the slitter knife unit 5 has a step portion composed of a large-diameter ring portion 2a and a small-diameter ring portion 2b on the outer peripheral portion thereof, and the left and right end surfaces 2c, 2d in the radial direction of these ring portions 2a, 2b are It is formed so as to be parallel. In addition, the holder 2 of the slitter knife unit 5
The small-diameter ring portion-side end surface 2c is provided with stoppers 3 that are partially protruded to the outer peripheral side from the outer peripheral surface 6 of the small-diameter ring portion 2b at several places near the periphery thereof. The ring-shaped thin blade 1 is fitted into the small-diameter ring portion 2b of the holder 2, and the ring-shaped thin blade 1 is urged toward the stopper 3 side of the holder 2 between the ring-shaped thin blade 1 and the large-diameter ring portion 2a. An elastic member 4 is provided and temporarily fixed to form a slitter knife unit 5.

The ring-shaped thin blade 1 has an inner peripheral edge 1a as shown in FIG.
Is larger than a part of the stopper 3 formed to project,
In addition, a notch portion 8 is provided so that it can be fitted into the small diameter ring portion 2b. In addition, the large concave portion 2d of the holder 2 is provided with an escape recess into which the stopper is inserted.
9,9 'are formed. In the present invention, the slitter knife unit 5, which is obtained by temporarily fixing the ring-shaped thin blade 1 fitted in the holder 2 in this manner by the stopper 3 and the elastic member 4,
A plurality of sets are attached so as to be fitted and pressed in parallel in the axial direction of the rotary shaft 6, so that the ring-shaped thin blades 1, 1 ′, 1 ″ are adjacent to the elastic members 4, 4 ′, 4 ″, and the slitter knife unit 5, Five',
5 ″ holders 2, 2 ′, 2 ″ large-diameter ring side end faces 2d, 2d ′,
It is an improvement of the slitter device characterized in that the distance μ between the ring-shaped thin blade 1 and the ring-shaped thin blade 1'which are sandwiched between 2d "and 2d" is specified.

As shown in the drawing, the present invention does not expose a rivet mounting hole 10 penetrating to the large-diameter ring-side end surface 2d at a position near the peripheral edge of the small-diameter ring-side end surface 2c of the holder 2 on the outer peripheral surface of the small-diameter ring portion 2b. And the rivet caulking recess in the opening of the end surface 2d on the large diameter ring side.
Formed 11.

Then, as shown in FIGS. 4 and 8, the semi-tubular flat rivet 12 is inserted into the rivet mounting hole 10 from the end face 2c on the small diameter ring side, and the hole portion at the tip of the rivet is inserted.
12a is fixed by caulking in the rivet caulking concave portion 11, and a part of the head portion 12b thereof projects outward from the outer peripheral surface of the small diameter ring portion 2a to form the stopper 3.

Further, according to the present invention, the large-diameter ring portion side end surface 2d is formed with an escape recess 9 at a position corresponding to the stopper 3 of the adjacent holder 2 into which the flat rivet head 12b forming the stopper 3 is inserted. It is a thing.

The above-mentioned structural features have a great significance in the case of cutting and manufacturing a tape having a particularly narrow width. That is, for example, a narrow audio tape (cutting width 6 mm
If you want to cut less than), the width of the holder 2 is also 6m
Must be less than m. Then, stopper 3
Need to be as thin as possible.

Conventionally, a small screw has been used to manufacture the stopper E for the convenience of manufacture. However, since the bamboo of the head of the machine screw is 2 mm to 3 mm, the depth of the escape groove C of the holder D must be 3 mm or more, and therefore the stopper E
It is necessary to provide a through hole H at a position facing the head of the stopper E and use the through hole H as an escape hole for the head of the stopper E (12th embodiment).
Figures to 15). Then, as shown in FIG. 14 and FIG. 15, a part of the through hole H becomes a stepped portion I,
The stepped portion I of the holder D has a drawback that a pointed ridge line portion K having weak strength is formed by the inner peripheral surface of the hole and the peripheral side surface J of the small diameter ring portion.

The present invention eliminates such drawbacks, and the stopper 3
As a result of researching an appropriate method of manufacturing, the semi-tubular flat rivet 12 (Fig. 10) has a thin head bamboo ε and can be easily fixed by caulking the hole 12a at the tip of the rivet. It was completed by paying attention to the fact that the function of temporarily fixing the ring-shaped thin blade 1 can be sufficiently fulfilled.

For example, if you are going to cut and make a narrow audio tape (cut width less than 6 mm), use a semi-tubular flat rivet.
The length λ of 12 must be 6 mm or less, preferably about 5 mm, but in that case the semi-tubular flat rivet 12 that can be used has a nominal diameter of 1.6 as shown in Fig. 10 and Table 1 according to JIS standards. mm, 2mm, 2.5mm, 3mm, the head diameter γ at that time is 3mm, 3.7mm, 4.6mm, 5.4mm, and the head thickness ε is 0.4mm, 0.6mm, 0.9mm , 1.1 mm. That is, the head of the JIS standard semi-tubular flat rivet 12 suitable for forming the stopper 3 has a thickness of 0.4 as described above.
Only ~ 1.1mm is projected. Therefore, the escape recess 9
It is sufficient to set the depth to about 0.8 mm to 1.3 mm, and it is not necessary to open a through hole even with a 6 mm holder due to the escape recess 9. Even when cutting 8 mm video tape with a tape width of 8 mm and video tape with a tape width of 12.7 mm, the semi-tubular flat rivet 12 of the above standard is used. It may be used by appropriately selecting from the ones of 11 mm or less.

(See Table 1) Incidentally, the embodiment shown in FIG. 1 to FIG.
This is an embodiment in the case where is formed thin. With the slitter device, the relief recess 9 formed on the end surface 2d on the large diameter ring portion side is formed at a position corresponding to the stopper 3 of the adjacent holder 2 and at a position not overlapping the front rivet mounting hole 10. is there.

The embodiment shown in FIGS. 5 to 8 is an embodiment in which the holder 2 is formed thicker, and the end surface on the large diameter ring portion side thereof is shown.
The slitter device is characterized in that a rivet caulking concave portion 11 formed in 2d is formed in a groove as an escape concave portion 9 provided at a position corresponding to the stopper 3 of the adjacent holder 2.

"Effects" In the first to third inventions according to the present application, since the semi-tubular flat rivet is used as the temporary fixing stopper, the head of the stopper can be made smaller than the conventional machine screw, and the shallow recess that does not penetrate the recessed recess is provided. A slitter knife unit composed of a thin holder that has just been drilled can be used. As a result, even the thin slitter knife unit can be temporarily fixed by a stopper that is easy to assemble, and the thin slitter knife unit has a predetermined width in the axial direction of the rotary shaft. It can now be installed in parallel.

In addition, the semi-tubular flat rivet can easily form a stopper simply by crimping, and compared to the case of using a conventional machine screw, there is an advantage that the small diameter tap processing is unnecessary and the processing man-hour is reduced. .

Furthermore, the head of the stopper can be made smaller, and it is sufficient to make a blind hole that does not pass through the relief recess of the corresponding holder.Therefore, the outer circumference of the holder has a step with a large diameter ring portion and a small diameter ring portion. When performing, the pointed ridge line portion due to the through hole is not formed unlike the conventional case. As a result, it has become possible to change the machining of the holder accompanied by the machining of the step portion of the high hardness product from the intermittent machining to the continuous machining. Moreover, since the pointed ridge line portion due to the through hole is not formed unlike the conventional case, it becomes easy to improve the processing accuracy such as the roundness and concentricity of the holder and the surface roughness, which leads to the quality improvement. It became a thing. Further, since the machining is facilitated in this way, the holder material can be made more sophisticated, the elastic action of the blade spring by the disc spring or the like can be smoothed, and the abrasion of the disc spring and the inner peripheral surface of the blade can be reduced.

Further, even in the case of assembling or cleaning when attaching the thin ring-shaped blade or the elastic member to the holder, the cloth does not get caught, so that there is an effect that the maintenance becomes easy.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an essential part showing an embodiment of a slitter device according to the present invention, FIG. 2 is a front view of a holder constituting the slitter device with a stopper attached, and FIG. FIG. 4 is a sectional view taken along line XX of FIG. 4, FIG. 4 is an enlarged sectional view of an essential part of FIG. 3, and FIG. 5 is a longitudinal sectional view of an essential part showing another embodiment of the slitter device according to the present invention. FIG. 7 is a front view showing a state in which a stopper is attached to a holder constituting a slitter device of another embodiment, FIG. 7 is a sectional view taken along the line YY of FIG. 6, and FIG. 8 is an enlarged sectional view of an essential part of FIG. FIG. 9 is a front view showing a ring-shaped thin blade constituting the slitter device according to the present invention, FIG. 10 is a side view showing a semi-tubular flat rivet constituting the slitter device according to the present invention, and FIG. It is a principal part expanded sectional view which shows 1 Example which shows the conventional slitter device.
FIG. 12 is a longitudinal sectional view of a main part of a slitter device according to another embodiment of the prior art, FIG. 13 is a front view of a holder that constitutes the conventional slitter device with a stopper attached, and FIG.
FIG. 15 is a sectional view taken along the line ZZ of FIG. <Explanation of main signs> 1 ... Thin ring-shaped blade, 2 ... Holder, 2a ... Large diameter ring, 2b ...
Small diameter ring portion, 2c ... Small diameter ring portion side end surface, 2d ... Large diameter ring side end surface, 3 ... Stopper, 4 ... Elastic member, 5 ... Slitting knife unit, 6 ... Rotating shaft, 9 ... Relief recess 10 ... Rivet mounting hole 11… Rivet caulking recess 12… Semi-tubular flat rivet,

Claims (3)

[Scope of utility model registration request] 1. A slitter comprising a ring-shaped thin blade, a holder for fitting and supporting the ring-shaped thin blade, a stopper for temporarily fixing the ring-shaped thin blade to the holder, and an elastic member for urging the ring-shaped thin blade toward the stopper side of the holder. A slitter device in which a plurality of sets of knife units are attached in parallel in the axial direction of a rotating shaft, wherein the holder has a stepped portion composed of a large diameter ring portion and a small diameter ring portion on the outer peripheral portion thereof, The left and right end surfaces in the radial direction of the part are formed so as to be parallel to each other, and the end surface of the holder on the side of the small-diameter ring part has a part of which protrudes to the outer peripheral side from the outer peripheral surface of the small-diameter ring part at several places near the periphery of the holder. Along with the stopper installed, the large-diameter ring side end surface of the holder is provided with an escape recess into which the stopper is inserted. A holder is provided with a cutout portion that is larger than a part of the stopper formed to project from the small diameter ring portion of the holder and that is arranged so that the holder can be fitted into the small diameter ring portion. Along with fitting the ring-shaped thin blade, an elastic member for urging the ring-shaped thin blade to the stopper side of the holder is provided between the ring-shaped thin blade and the large-diameter ring portion to form a temporary fixing slitter knife unit. The plurality of slitter knife units, which are temporarily fixed to the ring-shaped thin blade by a stopper and an elastic member, are attached so as to be fitted and pressed in parallel in the axial direction of the rotary shaft so that the ring-shaped thin blade serves as the elastic member. It is sandwiched between the end faces of the large-diameter ring portions of the adjacent holders, and the distance between the adjacent thin ring-shaped blades is specified to be a predetermined width. In the connecting device, a ring bed attachment hole that penetrates to the end surface on the large ring portion side is formed at a position near the peripheral edge on the end surface on the small ring portion side of the holder so as not to be exposed on the outer peripheral surface of the small ring portion. A rivet caulking recess is formed in the opening on the end surface on the large diameter ring side, and a semi-tubular flat rivet is inserted from the end surface on the small diameter ring side into the rivet mounting hole, and the hole at the tip of the flat rivet is inserted. The rivet is fixed by caulking in the caulking recess, and a part of the head of the rivet is protruded to the outer peripheral side from the outer peripheral surface of the small diameter ring portion to form a stopper, which is adjacent to the end surface on the large diameter ring portion side. A pick-up sleeve characterized in that a relief recess is formed at a position corresponding to the stopper of the holder, into which a flat rivet head forming the stopper is inserted. The other apparatus. 2. In the first aspect, when the holder is thinly formed, the relief recess formed on the end surface of the large-diameter ring portion side is located at a position corresponding to a stopper of an adjacent holder and has a rivet mounting hole. A slitter device characterized in that the slitter device is provided at a position where it does not overlap. 3. In the first aspect, when the holder is formed thicker, a recess for rivet caulking formed on an end surface of the large diameter ring portion side is provided at a position corresponding to a stopper of an adjacent holder. A slitter device characterized in that the slitter device is provided therein.