JP7361432B1 - Holder for circular blades - Google Patents

Abstract

[Problem] To stably cut a film. A holding mechanism 4 has end surfaces 412 and 422 that extend in a direction perpendicular to the radius of the circular blade 2 while holding the circular blade 2. Thereby, the circular blade 2 is exposed from the end faces 412 and 422 to the outside of the holding mechanism 4 in a half-moon shape, comes into contact with the film 7, and can cut the film 7. [Selection diagram] Figure 1

Description

The present invention relates to a holder for a circular blade.

As described in Patent Document 1 below, a slitter for cutting a film using a circular blade is known. In this slitter, the circular blade is intermittently rotated in one direction every time a predetermined amount of film is cut, thereby cutting at different positions on the circular blade. This is intended to maintain the film cutting ability of the circular blade.

In this technique, the film is cut by bringing the cutting edge of a circular blade into contact with the film supported by a grooved roller. During this cutting, the cutting edge of the circular blade enters the groove of the grooved roller, making stable cutting possible.

However, depending on the use and type of film, it may be necessary to cut the film while it is not directly supported by the rollers (that is, it is floating in the air between the rollers). Such a cutting method is referred to as "air cutting" in this specification. In the case of this aerial cutting, since the film swings widely during travel, it is difficult to stably cut the film with a conventional slitter using a circular blade.

For this reason, a rectangular so-called razor blade is used for aerial cutting. However, the razor blade has to be replaced more frequently than the circular blade, which causes a problem of lower work efficiency.

Japanese Patent Application Publication No. 2018-164955

As a result of various studies, the inventor of the present invention has found that by exposing the circular blade in a half-moon shape, aerial cutting can be performed stably.

The present invention has been made based on the above-mentioned findings. The main object of the present invention is to provide a circular blade holder that can stably cut a film even when cutting in the air.

The present invention can be expressed as an invention described in the following items.

(Item 1)
A holder that holds a circular blade for cutting a film that moves in one direction without rotating,
It is equipped with a holding mechanism that holds the circular blade so that it does not rotate,
The holding mechanism has an end face extending in a direction perpendicular to the radius of the circular blade while holding the circular blade, so that the circular blade extends from the end face to the outside of the holding mechanism. A circular blade holder characterized by being exposed in a half-moon shape so as to be able to come into contact with the film.

(Item 2)
The circular blade holder according to item 1, wherein the extension direction of the end face is parallel to the moving direction of the film.

(Item 3)
a release mechanism that releases the holding of the circular blade by the holding mechanism and makes the circular blade rotatable around an axis;
The circular blade holder according to item 1 or 2, further comprising: a click mechanism that intermittently rotates the rotatable circular blade.

(Item 4)
A method for cutting a film using the circular blade holder according to item 1 or 2, comprising:
arranging the circular blade holder so that the moving direction of the film moving in one direction is parallel to the end surface, and the depth of cut into the film is a predetermined amount or more;
A film cutting method, wherein the film is cut by moving the film while being in contact with the circular blade in a non-rotating state.

(Item 5)
The film moving in one direction passes through a position half the protruding height of the circular blade exposed from the end surface of the holding mechanism,
The film cutting method according to item 4, wherein the cutting depth of the circular blade into the film is 4 mm or more.

According to the technique of the present invention, the film can be cut by exposing the circular blade in a half-moon shape, so that the film can be stably cut even during aerial cutting.

FIG. 1 is an exploded perspective view of a circular blade holder according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of essential parts of the circular blade holder of FIG. 1. FIG. FIG. 3 is a perspective view showing a state in which the parts shown in FIG. 2 are assembled. FIG. 2 is a front view of the circular blade holder of FIG. 1 in an initial state. FIG. 5 is a perspective view of the circular blade holder of FIG. 4; FIG. 5 is a perspective view showing only the upper part of the circular blade holder of FIG. 4; It is an explanatory view showing a state where a hook in an initial state is engaged with a rail guide. It is an explanatory view for explaining operation of a lever. FIG. 3 is an explanatory diagram for explaining a situation in which a hook is operated by operating a lever. FIG. 3 is an explanatory diagram for explaining a situation in which a hook is operated by operating a lever. It is an explanatory view for explaining operation of a lever. It is an explanatory view showing the upper part of the holder at the end point of lever operation. FIG. 3 is an explanatory diagram for explaining a situation where the engagement between the hook and the rail guide is released. FIG. 6 is a partially transparent explanatory diagram showing a situation similar to FIG. 5; FIG. 4 is a partially transparent explanatory diagram for explaining the situation at the end point of lever operation. FIG. 6 is a partially transparent explanatory diagram for explaining, in cross section, a situation in which the release mechanism operates due to the operation of the link mechanism. FIG. 17 is a partially transparent explanatory diagram showing a cross section of a portion different from FIG. 16; FIG. 3 is an explanatory diagram for explaining the operation of the click mechanism, with the lever removed. FIG. 4 is a partially transparent explanatory diagram for explaining the operation of the click mechanism. FIG. 4 is a partially transparent explanatory diagram for explaining the operation of the click mechanism. FIG. 3 is an explanatory diagram seen from the front for explaining the operation of the click mechanism. FIG. 4 is a partially transparent explanatory diagram for explaining the operation of the click mechanism. FIG. 4 is a partially transparent explanatory diagram for explaining the operation of the click mechanism. It is an enlarged perspective view of the hook unit in a click mechanism. It is an explanatory view for explaining operation of a click mechanism. It is an explanatory view for explaining how a circular blade rotates by a click mechanism. FIG. 3 is an explanatory diagram for explaining how the holder returns to its initial state. FIG. 3 is an explanatory diagram for explaining how the holder returns to its initial state. 29 is an explanatory diagram for explaining a state further advanced from the state shown in FIG. 28. FIG. 30 is an explanatory diagram for explaining a state further advanced from the state of FIG. 29. FIG. FIG. 6 is an explanatory diagram for explaining the operation of the hook unit when the holder returns to its initial state. 32 is an explanatory diagram for explaining a state further advanced from the state of FIG. 31. FIG. 33 is an explanatory diagram for explaining a state further advanced from the state of FIG. 32. FIG. It is an explanatory view showing a hook unit which returned to an initial state. FIG. 3 is a partially exploded explanatory diagram for explaining a click operation. FIG. 2 is an enlarged explanatory diagram of a main part for explaining a click operation.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A circular blade holder (hereinafter sometimes simply referred to as "holder") 1 according to an embodiment of the present invention will be described with reference to the accompanying drawings. This holder 1 holds a circular blade 2 (described later) for cutting a film (not shown) that moves in one direction without rotating. The holder 1 of this embodiment includes a main body 3, a holding mechanism 4, a release mechanism 5, and a click mechanism 6 (see FIGS. 1 to 3).

(circular blade)
A mounting hole 21 is formed in the center of the circular blade 2 to fit into a male threaded portion fitted into the center of the outer holding body 42 of the holding mechanism 4. Three positioning holes 22 are formed around the attachment hole 21. The positioning hole 22 is removably fitted into three bosses (not shown) formed on the outer surface (bottom surface in FIG. 1) of a blade mount 43, which will be described later, so that the circular blade 2 and the blade mount 43 can be removably fitted. The relative positional relationship is fixed. The circular blade 2 is able to cut the film 7 by coming into contact with the film 7 to be cut (indicated by the dashed line in FIG. 4) at a predetermined cutting depth.

(Body)
The main body 3 is for attaching the holder 1 of this embodiment to a slitting device (not shown). A through hole 31 is formed in the main body 3, and a groove portion 32, which is an inclined groove, is provided on the inner peripheral surface of the through hole 31. A click (reverse rotation prevention mechanism) 62, which will be described later, is attached to the groove 32.

Further, the main body 3 has an end surface 33 that is flush with an end surface 412 of an inner holder 41 and an end surface 422 of an outer holder 42, which will be described later (see FIG. 1).

(holding mechanism)
The holding mechanism 4 includes an inner holding body 41, an outer holding body 42, a blade mount 43, and a male threaded portion 44. The holding mechanism 4 is configured to hold the circular blade 2 so that it does not rotate by sandwiching the circular blade 2 between an inner holding body 41 and an outer holding body 42.

The inner holding body 41 has a boss 411 that is fitted into the main body 3. The inner holding body 41 is biased from the main body 3 toward the outer holding body 42 by a spring (not shown), thereby holding and fixing the circular blade 2 between the inner holding body 41 and the outer holding body 42. It is now possible to do so.

The outer holding body 42 has a boss 421 that passes through the inner holding body 41 and is fitted into the main body 3. When the boss 421 is fitted into the main body 3, the outer holding body 42 is fixed to the main body 3 by suitable fixing means such as screws (not shown).

As already mentioned, the blade mount 43 has a boss (not shown) that fits into the positioning hole 22 of the circular blade 2, so that the circular blade 2 can be mounted thereon. A boss 431 is provided on the surface of the blade mount 43 on the side opposite to the circular blade 2, passing through an outer elevating body 52, an inner elevating body 51, and a click mount 61, which will be described later, and fitting into a click 62.

The male threaded portion 44 is screwed into the central portion of the blade mount 43 to fix the blade mount 43 to the circular blade 2.

When held by the inner holding body 41 and the outer holding body 42, the circular blade 2 is exposed to the outside in a half-moon shape, and in this state, the film 7 can be cut as already described. (See Figure 4). More specifically, the inner support 41 and the outer support 42 each have end surfaces 412 and 422 that extend in a direction perpendicular to the radius of the circular blade 2 while holding the circular blade 2 (see FIG. (see 1). Thereby, the circular blade 2 is exposed from these end faces 412 and 422 to the outside of the holding mechanism 4 in a half-moon shape, and can come into contact with the film 7 to be cut. These end surfaces 412 and 422 correspond to an example of the end surfaces of the holding mechanism in the present invention.

(Release mechanism)
The release mechanism 5 temporarily releases the circular blade 2 from being held by the holding mechanism 4 and makes the circular blade 2 rotatable around the axis. The release mechanism 5 of this embodiment includes an inner elevating body 51, an outer elevating body 52, a link mechanism 53, and a hook 54.

A rod 521 is provided at the center of the outer elevating body 52 and extends in the axial direction of the circular blade 2 when attached to the holder 1. The tip of the rod 521 (the upper end in FIG. 1) is attached to the link mechanism 53, and is configured to move up and down by operating the link mechanism 53 (see FIGS. 16 and 17, which will be described later).

The link mechanism 53 releases the holding of the circular blade 2 by moving at least one of the inner holding body 41 and the outer holding body 42. Specifically, the link mechanism 53 of this embodiment moves the outer elevating body 52 in a direction away from the circular blade 2 by the operation of a lever 64, which will be described later. At that time, the link mechanism 53 is adapted to raise the hook 54. The detailed structure of the release mechanism 5 will be described later as an explanation of its operation.

(click mechanism)
The click mechanism 6 intermittently rotates the rotatable circular blade 2. The click mechanism 6 includes a click mount 61, a click (reverse rotation prevention mechanism) 62, a latch part 63, a pair of levers 64, a hook unit 65, a rail guide 66, and a lever mount 67.

The click mount 61 holds the click 62. The click mount 61 is provided with a boss 611 for attaching the latch part 63 to the click mount 61 (see FIG. 2). The click 62 has three engaging pawls 621 that engage with the groove 32 of the main body 3 to prevent reverse rotation of the circular blade 2 (see FIG. 2).

The latch part 63 is provided with grooves (slanted grooves) formed at regular intervals on its outer periphery, and rotates the circular blade 2 intermittently at a predetermined angle.

The pair of levers 64 operate the link mechanism 53 to operate the release mechanism 5. Further, when the lever 64 is rotated in one direction around the axis of the circular blade 2, the lever 64 rotates the circular blade 2 by a predetermined angle. The click (reverse rotation prevention mechanism) 62 prevents the circular blade 2 from rotating in the opposite direction when the lever 64 returns to its initial position after being rotated in one direction.

The hook unit 65 engages with the latch part 63 and rotationally drives the latch part 63.

The two rail guides 66 each have a recess 661 that engages with the hook 54 of the release mechanism 5 to prevent accidental rotation of the link mechanism 53, that is, the lever 64.

The lever mount 67 supports the lever 64 and the link mechanism 53 so that they can each perform predetermined operations. Further, the lever mount 67 has a rib 671 that rotates as the lever mount 67 rotates (see FIG. 19, which will be described later). The rib 671 comes into contact with the hook unit 65 as the lever mount 67 rotates. The detailed configuration of the click mechanism 6 will also be described later as an explanation of its operation.

(Holder operation)
Hereinafter, the operation of the holder of this embodiment will be described in detail with reference to the drawings.

(initial state)
The holder in its initial state is shown in FIGS. 4 to 7. In this state, the pair of levers 64 of the click mechanism 6 are in an open state, and the circular blade 2 is sandwiched and fixed between the inner holding body 41 and the outer holding body 42 of the holding mechanism 4. There is. Moreover, since the circular blade 2 is attached to the blade mount 43, rotation around the axis is reliably prevented. In this state, the film 7 can be cut by passing through the position shown by the dashed line in FIG.

In this embodiment, while the circular blade 2 is reliably held by the holding mechanism 4, the film 7 can be cut in the air by the circular blade 2 exposed in a half-moon shape. Moreover, in this embodiment, since the end faces 412 and 422 are provided on the inner and outer holders 41 and 42 of the holding mechanism 4, the circular blade 2 can be exposed in a half-moon shape, thereby reducing the depth of the cut into the film 7. It can be made deeper than the conventional one, and thereby the film 7 that is displaced in the thickness direction can be reliably cut during aerial cutting.

In this way, in this embodiment, the circular blade holder is set so that the moving direction of the film 7 moving in one direction is parallel to the end surfaces 412 and 422, and the cutting depth into the film 7 is a predetermined amount or more. The film 7 can be cut by placing the blade 1 and moving the film 7 in contact with the circular blade 2 in a non-rotating state.

Here, it is preferable that the film 7 moving in one direction is set so as to pass through a position that is half the protruding height of the circular blade 2 exposed from the end faces 412 and 422. Further, the cutting depth of the circular blade 2 into the film 7 is preferably 4 mm or more, more preferably about 5 mm.

In the initial state, the hook 54 of the release mechanism 5 is engaged with the recess 661 of the rail guide 66 (see FIG. 7), and in this state, the lever 64 cannot rotate around the axis of the circular blade 2. There is.

(Rotation of circular blade)
Next, the operation when rotating the circular blade 2 intermittently will be described below.

(Release of holding circular blade)
First, operate the pair of levers 64 with your fingers to raise the ends (see FIGS. 8 to 17). 8 to 11 show the state in which the lever 64 is being raised, and FIGS. 12 to 13 show the state after the lever 64 has been raised. 14-15 and 16-17 each show the progress of the rise. The end portions of the levers 64 can be easily raised by the user pinching the pair of levers 64 from the outside with his fingers (for example, with his thumb and forefinger). When the end of the lever 64 rises, the hook 54 rises due to the operation of the link mechanism 53, and the engagement between the hook 54 and the recess 661 of the rail guide 66 is released (see FIGS. 12 and 13). As a result, the restriction on the lever 64 rotating around the axis of the circular blade 2 is released. At the same time, due to the operation of the link mechanism 53, the rod 521 of the outer elevating body 52 of the release mechanism 5 rises (that is, moves upward in FIG. 1). Along with this movement of the outer elevating body 52, the inner holding body 41 also rises, and the holding of the circular blade 2 by the inner holding body 41 is released (see FIGS. 16 to 17). Thereby, the circular blade 2 becomes rotatable by the click mechanism 6. Here, since the inner holding body 41 is pressed in the direction of the circular blade 2 from the main body 3 by a spring (not shown), it rises against this spring.

(Click action)
Next, the lever 64 (see FIG. 15) with its end raised is rotated in a direction around the axis of the circular blade 2 (clockwise in FIG. 18). This operation can also be executed without difficulty by pinching the pair of levers 64 with the user's fingers and twisting them in one direction. Then, the rib 671 (see FIG. 19) of the lever mount 67 also rotates. When the rib 671 rotates by a predetermined angle (for example, about 10° to 40°, preferably 30° to 40°, and 35° in this embodiment), the rib 671 comes into contact with the hook unit 65. When the lever is further twisted and rotated in this state, the rib 671 pushes the hook unit 65. The hook unit 65 is engaged with the latch part 63, and when the hook unit 65 is pushed in, the latch part 63 rotates. The latch part 63 rotates together with the circular blade 2 via the click mount 61 and the blade mount 43, so that the circular blade 2 can be rotated synchronously (see FIG. 26). The movable stroke of the hook unit 65 is regulated, so that the hook unit 65 can move by, for example, an angle of 360° divided by the period of the groove of the latch part 63 (for example, 10°, although this is not limited). Therefore, once the circular blade 2 rotates by a predetermined angle (for example, 10 degrees), it cannot rotate any further.

That is, according to this embodiment, the rotation angle of the circular blade 2 can be accurately regulated. Thereby, the work burden on the user during intermittent rotation of the circular blade 2 can be reduced.

The hook unit 65 is biased toward the latch part 63 by a spring (not shown) (see FIGS. 24 and 25), so that the two can be reliably engaged.

(Lever return)
When the hook unit 65 cannot be moved any further, the user attempts to rotate the lever 64 further, but is unable to do so, and therefore returns the lever 64 to its initial position (see FIG. 27). As a result, the hook 54 of the release mechanism 5 also returns to its initial position and is accommodated in the recess 661 of the rail guide 66 (see FIGS. 28 to 30). Further, as described above, the hook unit 65 is biased toward the latch part 63, but when returning, the two do not engage, and the hook unit 65 resists the biasing force and returns to the initial position while rising slightly. (See Figures 31 to 33). Here, in the state returned to the initial position, it is preferable that a slight gap be formed between the facing surfaces of the hook unit 65 and the latch part 63 (see FIG. 34). This allows the hook unit 65 to smoothly return to its initial position. In this embodiment, a spring (not shown) may be provided to bias the hook unit 65 to help return the hook unit 65 to its initial position.

(Preventing reverse rotation of circular blade 2)
The click 62 rotates together with the circular blade 2 by a predetermined angle via the click mount 61 and the blade mount 43, and engages with the groove 32 of the main body 3 (see FIG. 35). Here, the angle between the grooves in the groove portion 32 (that is, the groove formation period) is matched with the groove of the latch part 63.

On the other hand, when the lever 64 returns, the engaging claw 621 of the click 62 comes into contact with the groove 32, and the reverse rotation of the click 62 is prevented (in FIG. 36, rotation in the counterclockwise direction in the figure is prevented. ). Here, the click 62 is configured to rotate together with the circular blade 2 via the click mount 61 and the blade mount 43. Thereby, reverse rotation of the circular blade 2 can be prevented.

Therefore, in this embodiment, the circular blade 2 can be reliably rotated intermittently by a predetermined angle simply by the user rotating the holder 1 in one direction. This has the advantage that the efficiency of the cutting operation using the circular blade 2 can be improved.

When replacing the circular blade 2, the male threaded portion 44 of the holding mechanism 4 is removed from the blade mount 43, and then the outer holder 42 is removed from the inner holder 41. In this state, one side of the circular blade 2 is completely exposed, so the circular blade 2 can be removed from the blade mount 43 and replaced. After replacement, return to the initial state by reversing the procedure. This allows the cutting operation to be performed again.

Note that the description of the embodiment is merely an example, and does not indicate the configuration essential to the present invention. The configuration of each part is not limited to the above as long as it can achieve the purpose of the present invention.

1 Holder 2 Circular blade 21 Mounting hole 22 Positioning hole 3 Main body 31 Through hole 32 Groove 33 End face of main body 4 Holding mechanism 41 Inner holder 411 Boss of inner holder 412 End face of inner holder (end face of holding mechanism)
42 Outer holder 421 Boss of outer holder 422 End face of outer holder (end face of holding mechanism)
43 Blade mount 431 Boss of blade mount 44 Male thread 5 Release mechanism 51 Inner elevating body 52 Outer elevating body 521 Rod 53 Link mechanism 54 Hook 6 Click mechanism 61 Click mount 611 Click mount boss 62 Click (reverse rotation prevention mechanism)
621 Engagement claw 63 Latch parts 64 Lever 65 Hook unit 66 Rail guide 661 Recess of rail guide 67 Lever mount 671 Rib 7 Film

Claims (5)

A holder for holding a circular blade for cutting a film moving in one direction without rotating while the film is floating in the air , and for attaching the circular blade to a slitting device ,
It is equipped with a holding mechanism that holds the circular blade so that it does not rotate,
The holding mechanism has an end surface (412, 422) formed to extend in a direction perpendicular to the radius of the circular blade while holding the circular blade, and the end surface is formed to extend when the film is cut. is the end face closest to the film, and the end face extends linearly from the leading end side to the rear end side of the end face in the moving direction of the film, and the extending direction of the end face is the end face closest to the film. The circular blade is exposed from the end face to the outside of the holding mechanism in a half-moon shape so that it can come into contact with the film, and the circular blade is parallel to the moving direction of the end face. A holder for a circular blade, characterized in that a space is formed between the tip of the circular blade exposed in a half-moon shape and the film can swing in its thickness direction. further comprising a main body attached to the slitting device,
the holding mechanism is attached to the main body,
The circular blade holder according to claim 1 , wherein the main body has an end surface (33) flush with the end surface (412, 422) of the holding mechanism . a release mechanism that releases the holding of the circular blade by the holding mechanism and makes the circular blade rotatable around an axis;
The circular blade holder according to claim 1 or 2, further comprising a click mechanism that intermittently rotates the rotatable circular blade. A method for cutting a film using the circular blade holder according to claim 1 or 2,
arranging the circular blade holder so that the moving direction of the film moving in one direction is parallel to the end surface, and the depth of cut into the film is a predetermined amount or more;
A film cutting method, wherein the film is cut by moving the film while being in contact with the circular blade in a non-rotating state. The film moving in one direction passes through a position half the protruding height of the circular blade exposed from the end surface of the holding mechanism,
The film cutting method according to claim 4, wherein the cutting depth of the circular blade into the film is 4 mm or more.