JP4365155B2 - Slitter for rotary cutter and wallpaper pasting machine - Google Patents

Description

  The present invention relates to a rotary cutter and a slitter for a wallpaper pasting machine provided with the rotary cutter.

  FIG. 5 is a side perspective view showing the overall configuration of a conventional automatic wallpaper pasting machine. As shown in FIG. 5, the automatic wallpaper pasting machine includes a lower structure 52 in which a glue paste 54 that stores glue is installed, an upper structure 53 that is openable and closable with respect to the lower structure 52, and a lower structure. 52 is mainly composed of a leg portion 531 supporting 52.

  In the lower structure 52, the full width feeding roll 56 for drawing the cloth C into the gluing machine main body 51 from the rear side and feeding it to the gluing roll 58, and the glue in the gluing pad 54 to the gluing roll 58. A glue raising roll 513 for transferring, a glued roll 58 for applying glue on the back of the cloth, a doctor roll 57 for adjusting the amount of glue in contact with the glued roll 58, and applying a proper tension to the cloth C to the front part The leveling rolls 59 fed out in the direction are pivotally supported on the side plates of the glue basket 54 or the bearing plates parallel to the side plates so that they can be linked to each other via gears and arranged in parallel at a predetermined interval.

  On the other hand, the upper structure 53 forms a pinch roll paired with the feed roll 56 and has a full width upper pinch roll 510 having a measuring function, and rolls and gears arranged in the lower structure 52. And a drive roll 512 for applying a feeding tension to the cloth C in the front direction of the pasting machine body, and a press stay 511 for pressing the cloth C from above between the upper pinch roll 510 and the drive roll 512. Are pivotally supported by the main body side bearing frames of the upper structure 53 so that they are arranged in parallel with each other at a predetermined interval. In addition, a slitter 61 that cuts both side edges of the cross is detachably attached to the rear surface side of the lower structure 52.

  Further, a pair of legs 531 supporting both side edges of the lower structure 52 are crossed from a roll roll R passed through the central axis of a cross core rod 541 supported at the tip of the cross receiving bracket 542. A first tension bar 532 which is in contact with C and applies a pulling load at the pulling port of the pasting machine main body is bridged. Above that, a second tension bar 533 is also bridged, which similarly contacts the cross C and applies a pulling load at the pulling port.

  FIG. 6 is a schematic configuration diagram of the pasting machine slitter 61 attached to the automatic wallpaper pasting machine of FIG. As shown in FIG. 6, the slitter 61 includes an over cutter (upper blade) 62, an under cutter (lower blade) 63, a short shaft 64, a long shaft 65, a guide roll 66, and a spring stopper 67. It is configured.

  The over cutter 62 is a circular blade, and is supported so as to be slidable on a short shaft 64 separately attached above both ends of the slitter 61. The overcutter 62 is fixed on the short shaft 64 by tightening a set screw 62b attached to a boss 62a provided on the overcutter 62.

  The short shaft 64 is slidably supported by the overcutter 62, and one end of the short shaft 64 is fixed inside a front side plate (hereinafter referred to as "overstay") 612 of the slitter 61, such as aluminum, A short shaft bracket (hereinafter, referred to as “SS bracket”) 614 is rotatably supported, and the other end is housed in a gear box 610, and a wall covering material conveyance direction (in the direction of an arrow X) to be described later. ) Are attached above both ends of the slitter 61 in a direction (arrow Y direction) orthogonal to the vertical axis. In the gear box 610, a gear provided on the long shaft 65 (described later) and a gear provided on the short shaft 64 are housed in a meshed state.

  The undercutter 63 is also a circular blade, and is screwed to the cutter set boss 68 and fixed to the cutter set boss 68. The undercutter 63 is in contact with the other end of the spring 69 held at one end by a spring stopper 67 via the cutter set boss 68, and is always directed toward the overcutter 62 by the elastic force of the spring 69. Is energized.

  The undercutter 63, the spring stopper 67, and the coil 69 are slidably supported on the long shaft 65, and the undercutter is tightened by tightening a set bolt 67a attached to the spring stopper 67. 63, the spring stopper 67, and the coil 69 are fixed on the long shaft 65.

  The long shaft 65 is housed in the gear box 610 at both ends, and is disposed in parallel with the short shaft 64 across the lower ends of the slitter 61. It is supported by a long shaft bracket (hereinafter referred to as “LS bracket”) 615 that is fixed inside 613. Further, a short shaft 64, a spring stopper 67, a spring 69, and a guide roll 66 for smoothly feeding the conveyed wall covering material into a pasting machine main body to be described later are pivotally supported.

  A scale (scale plate) 616 is attached to the slitter 61 at positions corresponding to the over cutter 62 on the outer surfaces of both ends of the overstay 612.

  Further, a hook 617 is provided on the outer surface of the center stay 613 so that the slitter 1 can be easily attached to or removed from the gluing machine. When the hook 617 is locked to the gluing machine, A power transmission gear 618 that transmits the driving of the accessory and drives the slitter 61 is provided on the rear surface side of one gear box 610. The overcutter 62, the undercutter 63, and the guide roll 66 disposed in the slitter 61 are rotationally driven via the power transmission gear 618 meshed with a gear attached to the shaft end of the drive roll of the gluing machine. It is like that.

  In the gluing operation, the operator first removes the scale plate 616 in order to cut the ears of the extra width in order to make the width of the cloth (the width in the direction perpendicular to the cross conveyance direction) a desired width. While viewing, the overcutter 62 is moved on the short shaft 64 and the undercutter 63 is moved on the long shaft 65 to set a desired cross width.

  In order to set the overcutter 62 and the undercutter 63 to a desired cross width, the set bolt 62b fastened to the boss 62a of the overcutter 62 fixing the overcutter 62 on the short shaft 64 is loosened. At the same time, by loosening the set bolt 67a fastened to the spring stopper 67 that fixes the undercutter 63 on the long shaft 65, the overcutter 62 and the undercutter 63 are moved to desired positions, and again. The complicated work of tightening the set bolts 62b and 67a and fixing the overcutter 62 and the undercutter 63 had to be performed.

  As a device for easily performing this complicated operation, at least one cutting blade of the pair of cutting blades is provided with a pressing means that presses the other cutting blade against the other cutting blade, and the pressing means includes a stopper. Thus, there has been proposed a pressing means that can move in the pressing direction but can be moved in the reverse direction by releasing the stop by the stopper (see Patent Document 1). Further, there has been proposed an apparatus in which the upper rotary blade is fixed to the upper shaft, the lower rotary blade is fixed to the lower shaft, and the upper and lower shafts are integrally translated in the axial direction (see Patent Document 2).

JP-A-11-170192 JP2001-30699

  However, in Patent Document 1, since the stopper has a chamfered mounting shaft with a chamfered D hole, and this can be attached to the mounting shaft obliquely, the installation area is small and the mounting position is shifted due to vibration or the like. There is a fear. Furthermore, in the mechanism of Patent Document 1, it is difficult to match the axis of the stopper and the axis of the mounting shaft. In the slitter, if the axis of the rotating mounting shaft and the stopper provided with the rotary blade do not match, One of the causes of blurring. In addition, it is difficult to obtain a surface of the rotary blade that is strictly perpendicular to the attachment (rotation) axis, which tends to be slightly inclined with respect to the attachment axis, which causes another blur. Therefore, there is a drawback that the slitting side of the slitter is difficult to be uniform.

  A chuck mechanism such as a collet chuck is conceivable if it can be easily attached to and detached from the mounting shaft. The collet chuck presses the three claws against the shaft with equal force, and the three claws are arranged on the same circumference, so that the shaft to be mounted can be easily aligned with the axis of the collet chuck. A plane perpendicular to the axis can be easily obtained. However, the collet chuck has many parts and is expensive. Further, when the claw or part of the shaft is missing, the claw or the shaft cannot be pressed with an equal force, and there is a drawback that some of the deficiencies require replacement of all members.

  Moreover, although patent document 2 is good without a surface blurring, since it is a mechanism in which the shaft united from the gluing machine slitter projects, there is a drawback that a wide work site is required.

  The present invention not only makes it easy to adjust the cutting width, which is a complicated operation, but also does not require a wide work site, and can reliably fix the rotary blade to the shaft. It is an object of the present invention to obtain a rotary cutter and a slitter for a wallpaper pasting machine that can easily obtain a surface of a rotary blade that is coaxial with and exactly perpendicular to the (rotation) axis.

A rotary cutter according to the invention described in claim 1 is a holder member for holding a rotary blade;
A rotating shaft passed through the through boss hole of the holder member;
In the rotary cutter provided with a fixing mechanism for releasably fixing the holder member on the rotating shaft to the rotating shaft,
The fixing mechanism is
A pressing mechanism that applies a pressing force in the radial direction toward the axis to the outer peripheral surface of the rotating shaft located inside the through-boss hole;
The operating position of the pressing force on the outer peripheral surface of the rotating shaft is supported by the pressing force at two positions separated in the circumferential direction on the outer peripheral semi-circular surface of the rotating shaft on the side opposite to the axial center. The first and second support portions provided on the inner peripheral surface of the through boss hole,
The first and second support portions are arranged at symmetrical positions with respect to the plane including the center line of the pressing force and the boss hole axis, and are equal to each other toward the boss hole axis. It is a plane of symmetrical opening angle provided in the
The contact portion of the rotating shaft that contacts the first and second support portions is constituted by an arc peripheral surface portion that is concentric with the shaft axis and has an equal eccentric distance,
The distance between the boss hole axis and the first support part is equal to the distance between the shaft axis and the shaft contact part that contacts the first support part, and
The distance between the boss hole axis and the second support portion is equal to the distance between the shaft axis and the shaft contact portion that contacts the second support portion.

The rotary cutter according to the invention described in claim 2 is characterized in that the pressing mechanism according to claim 1 includes a tightening screw mechanism that presses the rotating shaft from the inner surface of the through boss hole toward the axis. It is what.

A rotary cutter according to a third aspect of the present invention is the rotary cutter according to the first aspect , wherein the pressing mechanism according to the first aspect includes a key groove portion formed between a part of the inner surface of the through boss hole and the surface of the rotating shaft facing it. A wedge key that is inserted into the key groove portion in the axial direction of the rotary shaft to fix the holder member and the rotary shaft to each other; a biasing mechanism that biases the wedge key in the direction of insertion into the key groove portion; And an operation mechanism for moving the key in a direction to be extracted from the key groove portion against the pressing of the urging mechanism.

According to a fourth aspect of the present invention, there is provided a rotary cutter according to the third aspect , wherein the key groove portion according to the third aspect includes two key grooves adjacent to each other with a space in the shaft axial direction, and each key groove has an individual wedge key. Are inserted in directions away from each other, and the biasing mechanism includes a biasing member that simultaneously acts on the individual wedge keys, and the operation mechanism also includes an operation member for simultaneously moving the individual wedge keys. It is characterized by having

Slitter wallpaper sizing machine according to have been present invention according to claim 5, in order to continuously glue on one side is to cut the edges along the transport direction of the sheet-like wall Paneling applied, wherein The rotary cutter according to any one of Items 1 to 4 is provided.

  As described above, the present invention can not only easily adjust the cutting width, which is a complicated operation, but also can securely fix the rotary blade to the attachment (rotation) shaft without requiring a large work site. Further, there is an effect that the surface of the rotary blade that is strictly perpendicular to the mounting (rotation) shaft can be easily obtained.

  The present invention includes a holder member that holds the rotary blade, a rotary shaft that is passed through the through boss hole of the holder member, and a fixing mechanism that releasably fixes the holder member on the rotary shaft to the rotary shaft. In the rotary cutter, the fixing mechanism applies a pressing force in the radial direction toward the axial center to the outer peripheral surface of the rotating shaft positioned inside the through boss hole, and the pressing mechanism on the outer peripheral surface of the rotating shaft. The pressure acting position refers to the inner circumference of the through boss hole for supporting the rotating shaft against the pressing force at two positions separated in the circumferential direction on the outer circumferential surface of the outer circumference of the rotating shaft on the side opposite to the axis. A shaft abutting portion that includes first and second bearing portions provided on the surface, a distance between the boss hole axis and the first bearing portion, and a shaft abutting position on the shaft axis and the first bearing portion; Until Since the distance is equal, and the distance between the boss hole axis and the second support part is equal to the distance between the shaft axis and the shaft contact point that contacts the second support part. The shaft center of the through boss hole of the holder member and the shaft center of the rotating shaft are fixed at the same time by the fixing mechanism, and the surface perpendicular to the rotating shaft is fixed at the same time.

  In particular, the first and second support portions are provided at equal bulging heights toward the boss hole axis at positions symmetrical to the plane including the center line of action of the pressing force and the boss hole axis. In the case where the contact portion of the rotary shaft that contacts the first and second support portions is formed of an arc peripheral surface portion that is concentric with the shaft axis and has an equal eccentric distance, The surface of the rotary blade that is coaxial and strictly vertical can be easily obtained.

  The pressing mechanism may be any mechanism that reliably presses the rotating shaft from the inner surface of the through boss hole toward the axial center. As a specific embodiment, the rotating shaft extends from the side surface of the through boss hole to the opposing surface. A key groove formed between a part of the inner surface of the through boss hole and the surface of the rotating shaft facing it, and a key groove formed in the axial direction of the rotating shaft. A wedge key for fixing the holder member and the rotary shaft to each other, an urging mechanism for urging the wedge key in the direction of inserting the wedge key into the key groove, and a key against the pressing of the urging mechanism. Some have an operation mechanism for moving in the direction of extraction from the groove.

  FIG. 1 is an explanatory view for explaining the functional configuration of the main part of an embodiment of the rotary cutter of the present invention. As shown in the figure, there is a rotating shaft 1 that is either a short shaft that holds an upper blade indicated by a two-dotted line or a long shaft that holds a lower blade. The rotary shaft 1 has a D-shaped rod-like cross section obtained by cutting a part of the circumference along a plane parallel to the shaft axis, and includes a circumferential portion 2 having a circumferential section and a planar surface portion 3. On the other hand, the holder member 5 fixed to the rotary shaft 1 is formed with a through boss hole 6 through which the rotary shaft 1 passes, and between a part of the inner surface of the through boss hole 6 and the surface portion 3 of the rotary shaft facing it. The key groove portion 4 is formed in the above. Further, the inner surface of the through boss hole 6 has two ridges that are equal to each other toward the axis of the boss hole and in contact with the circumferential portion 2 of the rotary shaft 1 in the tangential direction of the arc with respect to the central axis. The support portion 7 is provided so as to be in a plane-symmetrical position with respect to a plane connecting the position where the center of the key groove 4 faces the axis. Since the distance between the boss hole axis and the bearing and the distance between the shaft axis and the arc peripheral surface portion are equal, the boss hole axis and the shaft axis are on the same line.

  In such a rotating shaft 1 and the through boss hole 6, if a force 8 is applied to press the rotating shaft 1 in the direction of the midpoint on a straight line connecting the midpoint of the two support portions 7 and the central axis, the force is The forces 9 and 10 push the two support portions 7 perpendicular to the respective planes. Thereby, the surface of the rotary blade that is strictly perpendicular to the rotary shaft 1 can be easily obtained by the two support portions 7 that are at the same eccentric distance with respect to the central axis of the through boss hole. In this example, a D-shaped cross section is illustrated, but it is only necessary that the part contacting the two support parts is concentric with the shaft axis and has a side part with the same eccentric distance, and is ultimately parallel to the axis. However, the error can be eliminated by providing a certain width as the circular arc surface portion. Further, there is no problem even if the portion between the two support portions of the rotating shaft is cut to reduce the weight.

  In FIG. 1, the two support portions 7 are only required to be provided with the same raised height toward the axis of the boss hole, and more preferably have the same opening angle with respect to the force 8 pressing in the midpoint direction. Two planes in contact with the central axis may be used, and if the force is 9 or 10 at 120 degrees as shown in the figure, the pressing force 8 and the vertically pressing force 9 or 10 have an equal force relationship. The force 8 pressing in the direction of the intermediate point may be configured to be pressed with one or more screws or the like, for example, and in order to attach and detach and fix more simply, a wedge-shaped key is provided in the key groove portion 4. Can be easily obtained by inserting. Also, the key groove 4 is not limited to the plane surface portion 3 as long as a wedge-shaped key having a taper can be inserted into the surface of the rotary shaft 1. , One having a curved surface and three sides being linear.

  In addition, the key groove portion and the wedge key are provided in two directions before and after the shaft axial direction so that reliable attachment and removal are easy. That is, as a preferred embodiment, the key groove portion includes two key grooves adjacent to each other with a space in the shaft axial direction, and individual wedge keys are inserted into the key grooves in directions away from each other. Includes an urging member that simultaneously acts on the individual wedge keys, and the operation mechanism also includes an operation member for simultaneously moving the individual wedge keys.

  Moreover, what is necessary is just to provide the said rotary cutter in the slitter which cut | disconnects the edge part of cloth with an up-and-down rotary blade. Specific slitters include those that cut by high-speed rotation of a pair of left and right rotary blades, and those that sandwich and cross a cloth with a pair of left and right rotary blades. Use a rotary cutter. Further, the slitter of the present invention includes not only an automatic wallpaper pasting machine but also a one mounted on a manual wallpaper pasting machine.

  FIG. 2 is an explanatory view for explaining the configuration of a rotating shaft and a holder member fixed to the slitting machine according to one embodiment of the wallpaper pasting machine of the present invention, wherein a is a plan view and b is a side view. is there. As shown in FIG. 2, there is a short shaft 21 as a rotating shaft that holds the upper blade. This short shaft 21 has a D-shaped rod-shaped cross section obtained by cutting a part of the circumference along a plane parallel to the central axis, and includes a circumferential portion 22 having a circumferential section and a planar surface portion 23. On the other hand, a cutter set boss 25 as a holder member in which a screw hole 25a for fixing the upper blade with three screws is formed perpendicular to the rotary blade mounting surface 25b is penetrated through the short shaft 21 at the center thereof. A boss hole 26 is formed, and a key groove portion 24 is formed between a part of the inner surface of the through boss hole 26 and the surface portion 23 of the shaft 21 facing the boss hole 26. Furthermore, two planar support portions 27 that come into contact with the circumferential portion 22 of the short shaft 21 at the same eccentric distance with respect to the central axis are provided around the through boss hole 26.

  A tightening screw hole 28 is formed in the through boss hole 26 of the cutter set boss 25 in a direction extending from the intermediate point of the two support portions 27 through the central axis in the middle of the through boss hole 26. A fixing screw 29 is attached to the tightening screw hole 28. By tightening the fixing screw 29, the tip end portion comes into contact with and presses the cut surface portion 23 of the rotary shaft having a D-shaped cross section in both axial directions of the short shaft 21, and the cutter set boss 25 is placed on the short shaft 21. Fixed to.

  FIG. 3 is an explanatory view for explaining the configuration of a rotating shaft and a holder member fixed to the rotating shaft of another embodiment of the slitter for wallpaper pasting machine of the present invention, where a is a plan view and b is a side view. It is. As shown in FIG. 3, there is a short shaft 31 as a rotating shaft that holds the upper blade. The short shaft 31 has a D-shaped cross section obtained by cutting a part of the circumference along a plane parallel to the central axis, and includes a circumferential portion 32 having a circumferential section and a planar surface portion 33. On the other hand, a cutter set boss 35 serving as a holder member in which a screw hole 35a for fixing the upper blade with three screws is formed perpendicular to the rotary blade mounting surface 35b is penetrated through the short shaft 31 at the center thereof. A boss hole 36 is formed, and a key groove portion 34 is formed between a part of the inner surface of the through boss hole 36 and the surface portion 33 of the shaft 31 facing the boss hole 36. Further, two planar support portions 37 that contact the circumferential portion 32 of the short shaft 31 at an equal distance from the central axis are provided around the through boss hole 36.

  A release hole 38 is formed in the through boss hole 36 of the cutter set boss 35 in a direction extending from the midpoint of the two support portions 37 through the central axis in the middle of the through boss hole 36. The release hole 38 is provided with a spring member 39d that connects the two expanding portion pieces 39c with a support shaft 39b provided with a wedge member 39a at the tip thereof so as to be able to expand, and urges the support shaft in the expanding direction. An expansion jig 39 is attached. By this expanding jig 39, each of the wedge members 39 a at the front end portion is formed by cutting the surface portion 33 of the rotating shaft having a D-shaped cross section in both axial directions of the short shaft 31, the inner wall surface of the through boss hole 36, and the key groove portion 34. The cutter set boss 35 is fixed on the short shaft 31.

  4A and 4B are explanatory views for explaining the configuration of a rotating shaft and a holder member fixed to the rotating shaft of still another embodiment of the slitter for wallpaper pasting machine of the present invention. FIG. 4a is a plan view and FIG. FIG. As shown in FIG. 4, there is a short shaft 41 as a rotating shaft that holds the upper blade. The short shaft 41 has a D-shaped cross section obtained by cutting a part of the circumference along a plane parallel to the central axis, and includes a circumferential portion 42 having a circumferential section and a planar surface portion 43. On the other hand, a cutter set boss 45 as a holder member in which a screw hole 45a for fixing the upper blade with three screws is formed perpendicular to the rotary blade mounting surface 45b is penetrated through the short shaft 41 at the center thereof. A boss hole 46 is formed, and a key groove portion 44 is formed between a part of the inner surface of the through boss hole 46 and the surface portion 43 of the shaft 41 facing the boss hole 46. Further, two planar support portions 47 that contact the circumferential portion 42 of the short shaft 41 at the same eccentric distance with respect to the central axis are provided around the through boss hole 46.

  A release hole 48 is formed in the through boss hole 46 of the cutter set boss 45 in a direction extending from the intermediate point of the two support portions 47 through the central axis in the middle of the through boss hole 46. The release hole 48 includes a spring member 49d that connects the two expanding portions 49c with a support shaft 49b provided with a wedge member 49a at the tip thereof so as to be expanded, and biases the support shaft in the expanding direction. An expansion jig 49 is attached. By this expanding jig 49, each of the wedge members 49a at the tip portion is formed between the surface portion 43 of the rotary shaft having a D-shaped cross section in both axial directions of the short shaft 41 and the inner wall surface of the through boss hole 46. The cutter set boss 45 is fixed on the short shaft 41 by being inserted into the key groove portion 44.

It is explanatory drawing explaining the effect | action structure of the principal part of one Example of the rotary cutter of this invention. It is explanatory drawing explaining the structure of the rotating shaft of one Example of the slitter for wallpaper pasting machines of this invention, and the holder member fixed to this. It is explanatory drawing explaining the structure of the rotating shaft of another Example of the slitter for wallpaper pasting machines of this invention, and the holder member fixed to this. It is explanatory drawing explaining the structure of the rotating shaft of the another Example of the slitter for wallpaper pasting machines of this invention, and the holder member fixed to this. It is a side perspective view which shows the whole structure of the conventional automatic wallpaper pasting machine. It is a schematic block diagram of the slitter for paste machines attached to the automatic wallpaper paste machine of FIG.

Explanation of symbols

1 ... rotating shaft,
2. Circumference,
3 ... the face,
4 ... Key groove,
5 ... Holder member,
6 ... Through boss hole,
7 ... Support section,
8: Force for pressing the rotary shaft 1 in the direction of the intermediate point on a straight line connecting the intermediate point and the central axis,
9, 10... Force for pressing the two support portions 7 perpendicular to each plane,
21, 31, 41 ... short shaft (rotating shaft),
22, 32, 42 ... circumference,
23, 33, 43 ... face part,
24, 34, 44 ... keyway,
25, 35, 45 ... Cutter set boss,
25a, 35a, 45a ... screw holes,
25b, 35b, 45b ... rotary blade mounting surface,
26, 36, 46 ... through boss holes,
27, 37, 47 ... bearing part,
28 ... tightening hole,
38, 48 ... release holes,
29 ... Fixing screw 39, 49 ... Expansion jig,
39a, 49a ... wedge member (wedge key),
39b, 49b ... support shaft,
39c, 49c ... expanded piece (operation mechanism),
39d, 49d ... spring member (biasing mechanism),

Claims (5)

A holder member for holding the rotary blade;
A rotating shaft passed through the through boss hole of the holder member;
In the rotary cutter provided with a fixing mechanism for releasably fixing the holder member on the rotating shaft to the rotating shaft,
The fixing mechanism is
A pressing mechanism that applies a pressing force in the radial direction toward the axis to the outer peripheral surface of the rotating shaft located inside the through-boss hole;
The operating position of the pressing force on the outer peripheral surface of the rotating shaft is supported by the pressing force at two positions separated in the circumferential direction on the outer peripheral semi-circular surface of the rotating shaft on the side opposite to the axial center. The first and second support portions provided on the inner peripheral surface of the through boss hole,
The first and second support portions are arranged at symmetrical positions with respect to the plane including the center line of the pressing force and the boss hole axis, and are equal to each other toward the boss hole axis. It is a plane of symmetrical opening angle provided in the
The contact portion of the rotating shaft that contacts the first and second support portions is constituted by an arc peripheral surface portion that is concentric with the shaft axis and has an equal eccentric distance,
The distance between the boss hole axis and the first support part is equal to the distance between the shaft axis and the shaft contact part that contacts the first support part, and
The rotary cutter characterized in that a distance between the boss hole axis and the second support part is equal to a distance between the shaft axis and the shaft contact part that contacts the second support part.   The rotary cutter according to claim 1, wherein the pressing mechanism includes a tightening screw mechanism that presses the rotating shaft from the inner surface of the through boss hole toward the axial center. The pressing mechanism includes a key groove formed between a part of the inner surface of the through boss hole and the surface of the rotating shaft facing the through boss hole, and a holder member inserted into the key groove in the axial direction of the rotating shaft. A wedge key that fixes the rotating shaft to each other, an urging mechanism that urges the wedge key in a direction of inserting the wedge key into the key groove, and a wedge key that moves in a direction of being pulled out of the key groove against the urging mechanism. The rotary cutter according to claim 1 , further comprising: an operation mechanism for operating the rotary cutter. The key groove portion includes two key grooves adjacent to each other with a space in the shaft axial direction, and the individual wedge keys are inserted in the respective key grooves in directions away from each other, and the urging mechanism is attached to the individual wedge keys. The rotary cutter according to claim 3 , wherein the rotary cutter includes an urging member that acts simultaneously, and the operation mechanism includes an operation member for simultaneously moving the individual wedge keys. A rotary cutter according to any one of claims 1 to 4 is provided for cutting an edge portion along a conveying direction of a sheet-like wall covering material to which glue is continuously applied on one surface. Slitter for wallpaper pasting machine.

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