JP2005152394A - Rotary blade type cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary blade type cutter capable of efficiently cutting a sheet-like object to be cut with a prescribed width. <P>SOLUTION: The rotary blade type cutter comprises a plurality of rotary blades 3 arranged in the direction of blade thickness, a support means A for supporting the plurality of rotary blades 3 so that at least one of the rotary blades 3 is movable in the direction of blade thickness, and a lock mechanism B for restraining the movement of the rotary blades 3 in the direction of blade thickness and locking the rotary blades 3 so that the rotary blades 3 can be set and maintained at a desired interval. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a rotary blade type cutting tool used when cutting a sheet-like workpiece such as cloth.

Conventionally, in the field of handicrafts such as quilting and patchwork, as an example of a cutting tool used for cutting a sheet-like workpiece, there is a rotary blade type cutting tool described in Patent Document 1. This rotary blade type cutting tool has one rotary blade attached via a shaft to the tip of a grip part for a user to grip, and the rotary blade can rotate around the shaft. When using the rotary blade type cutting tool, a ruler is placed on the workpiece, and the rotary blade type cutting tool is moved along the ruler. Thereby, the to-be-cut object can be cut into a desired width.
Japanese Utility Model Publication No. 57-54780

  In quilting or patchwork, a large amount of strip-like cloth having a predetermined width may be required. On the other hand, according to the said rotary blade type cutting tool, the strip | belt-shaped cutting piece which can be cut out by one cutting operation is only one piece. Therefore, in the case where many belt-shaped cloths are conventionally produced, the number of cutting operations is increased, and as a result, the burden on the operator is increased.

  The present invention has been conceived under such circumstances, and an object of the present invention is to provide a rotary blade type cutting tool capable of efficiently cutting an object to be cut into a predetermined width.

  The rotary blade type cutting tool provided by the present invention supports a plurality of rotary blades arranged in the blade thickness direction and at least one of the plurality of rotary blades movable in the blade thickness direction. And a lock mechanism capable of regulating and locking the movement of the plurality of rotary blades in the blade thickness direction so that the plurality of rotary blades can be set and maintained at a desired interval. It is characterized by having.

  According to the rotary blade type cutting tool having such a configuration, it is possible to simultaneously cut a plurality of locations equivalent to the number of the rotary blades, and the intervals between the cut locations can be changed. For this reason, it is possible to cut out a plurality of strip-shaped cut pieces having a predetermined width by one cutting operation. Therefore, it is possible to reduce the number of cutting operations when cutting a plurality of strip-shaped cut pieces as compared with the conventional case, and the burden on the operator is reduced.

  In a preferred embodiment of the present invention, the support means includes a shaft extending in the blade thickness direction, and a plurality of holders supported by the shaft and supporting the plurality of rotary blades. At least one of the plurality of holders is a movable holder that is movable in the axial direction of the shaft.

  According to such a configuration, when changing the interval between the plurality of rotary blades, it is only necessary to pick and move the movable holder with a finger, and it is not necessary to directly touch the rotary blade with the finger.

  In a preferred embodiment of the present invention, the lock mechanism includes an operation lever and a pressure contact member that presses against the movable holder so as to prevent the movement of the movable holder when the operation lever is operated in a predetermined manner. It is equipped with.

  According to such a configuration, it is possible to regulate and lock the movement of the plurality of rotary blades in the blade thickness direction by a simple mechanism in which the pressure contact member is in pressure contact with the movable holder. Can be simplified. Further, since the lock mechanism can be operated by operating the operation lever, the operability of the lock mechanism is excellent.

  In a preferred embodiment of the present invention, the lock mechanism includes engagement means that can be engaged with and disengaged from the operation lever, and when the operation lever is operated in the predetermined manner, The operation state of the operation lever is maintained by engaging with the engagement means.

  According to such a configuration, since the operation lever is maintained in a predetermined operation state by the engaging means, it is not necessary to keep pressing the operation lever by hand in order to maintain the predetermined operation state during the cutting operation. , Usability is good.

  A preferred embodiment of the present invention will be specifically described with reference to the drawings.

  FIG. 1 is a perspective view showing a rotary blade type cutting tool 1 according to the present invention. For convenience of explanation, the upper and lower directions are specified with reference to FIG.

  The rotary blade type cutting tool 1 includes two rotary blades 3, a body 10, a support mechanism A, and a lock mechanism B.

  As shown in FIG. 4, each rotary blade 3 is a thin disk made of stainless steel or other hard metal, a circular through hole 3a is formed at the center, and the entire outer periphery is sharp. It is formed as a cutting edge portion 3b for cutting. The rotary blade 3 is detachably supported by a holder 21 described later.

  As shown in FIG. 2, the body 10 is formed by joining two upper and lower synthetic resin members, a grip portion 12 for a user to hold with a hand, an upper cover body 111, And a lower cover body 112. The grip portion 12 is formed integrally or separately from the upper cover body 111 and the lower cover body 112. The lower cover body 112 is formed with a recess 112a for accommodating a swing member 14 described later.

  The support mechanism A is for supporting the two rotary blades 3 so as to be movable in the blade thickness direction. As shown in FIGS. 3 and 4, the shaft 13, the two holders 21, It has.

  As shown in FIG. 3, the shaft 13 is for performing a slide guide of the two holders 21 and is, for example, a hexagonal prism shape that can be fitted into a through hole 21 h formed in the holder 21 so as not to be relatively rotatable. It is. Washers 15 and bolts 16 are detachably attached to both ends of the shaft 13. The cylindrical head portion 16a of the bolt 16 is supported between a pair of receiving portions 111d and 112d provided with semicircular cutout recesses provided at both ends of the cover bodies 111 and 112 (see FIG. 2). . Thus, the shaft 13 is rotatably supported by the cover bodies 111 and 112 in a horizontal posture.

  A swing member 14 is fitted and fixed at a substantially central position of the shaft 13. Further, the holders 21 are externally fitted on both sides of the shaft 13 across the swing member 14 so as to be slidable in the axial direction of the shaft 13. Since the washers 15 are attached to both ends of the shaft 13, each holder 21 can slide in the region between the swing member 14 and the washer 15. Each washer 15 also functions to prevent the holder 21 from falling off the shaft 13 during the assembly process of the rotary blade type cutting tool 1. On the upper surface of the swing member 14, a pressure receiving portion 14c constituting a part of a lock mechanism B described later is integrally formed. In the present embodiment, the shaft 13 and the swing member 14 are configured as separate members, but they may be integrally formed. Further, as means for attaching the holder 21 to the shaft 13 so as to be slidable and relatively non-rotatable, for example, a key groove is formed on the inner peripheral surface of the through hole of the holder and the outer peripheral surface of the shaft, and both the keys Means such as attaching a key material so as to straddle the groove may be employed. As a means for regulating the movement range of the holder 21, for example, the holder 21 and the inner side surfaces 111 e and 112 e (see FIG. 2) of the cover bodies 111 and 112 may be brought into contact without using the washer 15. .

  As shown in FIGS. 3 and 4, a hole 21 c penetrating in the thickness direction of the holder 21 is formed at the center of the holder 21. Bolts 22 are inserted into the holes 21 c, the through holes 3 a of the rotary blade 3, and the washers 23, and the bolts 22 are screwed into the nuts 24 to be tightened. It is rotatably supported. The two rotary blades 3 are arranged in the blade thickness direction so that their rotational axes substantially coincide. The knob 25 has a hole 25 c and is placed so as not to rotate relative to the nut 24. The knob cover 26 is fixed to the side surface of the holder 21 so as to cover the knob 25, and prevents the knob 25 from falling off the nut 24. The knob cover 26 is formed with a pair of locking pieces 26 a that engage with locking portions 21 g formed on the holder 21. Therefore, the operation of tightening and loosening the bolt 22 can be easily performed by picking and rotating the knob 25 with a finger. Of course, when performing the rotation operation, it is necessary to prevent the bolt 22 from slipping. As a means for that, for example, the shaft portion of the bolt 22 and the hole 21c of the holder 21 are formed in a non-circular cross section. Thus, the bolt 22 is not rotatable relative to the holder 21.

  The holder 21 is formed with an arc-shaped rib 21e that covers the cutting edge portion 3b of the rotary blade 3, and this rib 21e prevents a user's finger from inadvertently contacting the cutting edge portion 3b of the rotary blade 3. Plays a function to prevent. A marked line 21f indicating the attachment position of the rotary blade 3 is attached to the upper surface of the rib 21e. By referring to the marked line 21f and the scale of the gauge 111c attached to the upper surface of the upper cover body 111 (see FIGS. 2 and 5), the interval between the two rotary blades 3 can be accurately set to a predetermined dimension. It can be adjusted easily.

  As shown in FIGS. 2 and 6, the lock mechanism B is for maintaining the two rotary blades 3 at a desired interval, and includes an operation lever 17. The operation lever 17 is integrally formed with a pair of rotating shafts 17a. Since the rotation shaft 17a is fitted into a pair of operation lever mounting grooves 111a formed in the upper cover body 111, the operation lever 17 can rotate about the rotation shaft 17a. It is supported by. A pressure contact surface 111 b is formed on the lower surface of the upper cover body 111, and a pressure contact portion 21 j for performing pressure contact with the pressure contact surface 111 b is formed on the upper portion of the holder 21. The pressure contact surface 111b and the pressure contact portion 21j are both planar so that a sufficient frictional resistance can be obtained during pressure contact (see FIG. 4).

  As shown in FIG. 7, rubber 18 (for example, silicone rubber) as an example of a member that increases the frictional resistance at the time of pressure contact with the pressure contact portion 21 j is affixed to the pressure contact surface 111 b. On the lower end side of the operation lever 17, a pressing portion 17c for pressing the pressure receiving portion 14c of the swing member 14 is integrally formed. FIG. 7A shows a state in which the operation lever 17 stands up. At this time, there is a slight gap between the rubber 18 and the pressure contact portion 21j. At this time, the holder 21 is slidable with respect to the shaft 13. FIG. 7B shows a state where the operation lever 17 is pushed down and falls down. When the operation lever 17 is pushed down in this way, the pressing portion 17c presses the pressure receiving portion 14c, and accordingly, the swing member 14 and the shaft 13 rotate. Then, with the rotation of the shaft 13, the holder 21 moves upward, and the pressure contact portion 21 j is in pressure contact with the rubber 18. When such pressure contact occurs, the movement of both holders 21 relative to the upper cover body 111 is prevented by the frictional resistance of the pressure contact portion 21j and the rubber 18, and as a result, the two holders 21 and the two rotary blades 3 are The desired interval is maintained.

  The lock mechanism B is provided with an engagement mechanism C that can be engaged with and disengaged from the operation lever 17. The engagement mechanism C includes an engagement step portion 111e formed on the upper cover body 111 and an engagement convex portion 17d formed integrally with the operation lever 17. As shown in FIG. 7B, when the operation lever 17 is pushed down, the operation lever 17 is maintained in a tilted state by the engagement convex portion 17d engaging the engagement step portion 111e. In this state, the engagement between the engagement step portion 111e and the engagement convex portion 17d is released when a predetermined or higher pulling operation force is applied to the operation lever 17.

  The lock mechanism B is configured so that the rotary blades 3 can be set and maintained at a desired interval by a simple mechanism in which the holders 21 are pressed against the upper cover body 111, so that the structure of the lock mechanism B is simplified. be able to. Further, by setting the operation lever 17 in the tilted state, the two rotary blades 3 can be set and maintained at a desired interval, and the operability is excellent. Furthermore, since the operation lever 17 can be maintained in the collapsed state by using the engagement mechanism C, it is not necessary to continue to hold the operation lever 17 with a hand during the cutting operation of the object to be cut. It is good.

  Next, the usage example of the rotary blade type cutting tool 1 comprised as mentioned above is demonstrated.

  As shown in FIG. 8, the two rotary blades 3 are set to a desired distance L in advance, and the operation lever 17 is pushed down to lock the two holders 21. Then, with the workpiece S placed on the relatively hard underlay member T, the rotary blade type cutting tool 1 is moved while the two rotary blades 3 are in contact with the workpiece S. This makes it possible to simultaneously cut two places on the workpiece. At this time, by using a ruler or the like to set one of the rotary blades 3 to be separated from the one side Se of the workpiece S by a distance L, two strip-shaped cut pieces P each having a predetermined width L are set to 1 It is possible to cut out by the cutting operation. Therefore, the number of cutting operations when cutting a large number of strip-shaped pieces P is reduced, and the efficiency of the cutting work is greatly improved. As a result, the burden on the operator is reduced.

  When changing the interval between the two rotary blades 3, the operation lever 17 is lifted to release the locked state, and then the two holders 21 or one of them is picked with a finger and moved along the axial direction of the shaft 13. You can do it. Thus, since the distance between the two rotary blades 3 can be changed by picking and moving the holder 21 with a finger, it is not necessary to directly touch the rotary blade 3 with a finger.

  While specific embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the invention.

  In the present invention, one of the two rotary blades may be fixed, and only the other may be configured to be movable in the blade thickness direction.

  The rotary blade type cutting tool according to the present invention may have a configuration including three or more rotary blades.

  The support means in this invention should just be the structure which supports a some rotary blade so that a movement in a blade thickness direction is movable, and it is possible to employ | adopt a structure different from the structure provided with a shaft and a holder.

  In the above-described embodiment, the lock mechanism B is configured to press the holder 21 against the fixed upper cover body 111. On the contrary, the lock mechanism B may be configured to operate the upper cover body and press-contact the holder 21. Further, the operation lever may be formed integrally with the swing member. In short, the lock mechanism in the present invention only needs to have a function of restricting and locking the movement of the rotary blade in the blade thickness direction, and it is also possible to adopt a structure different from the above embodiment.

  Various types of rotary blades can be used in the present invention. For example, the cutting edge can be formed in a wavy shape by forming the cutting edge portion of the rotary blade in a wavy shape.

  In the above embodiment, the rubber 18 is stuck on the pressure contact surface 111b, but the rubber 18 may be stuck on the pressure contact portion 21j. Further, a member different from rubber may be interposed between the press contact surface 111b and the press contact portion 21j. Further, the pressure contact surface 111b and the pressure contact portion 21j may be configured to be in direct pressure contact without using such a member that increases the frictional resistance of the pressure contact portion.

  When the rotary blade type cutting tool is not used, a protective cover that covers the rotary blade may be attached so that a finger or the like can be prevented from accidentally contacting the rotary blade.

  The specific shape and material of each member constituting the rotary blade type cutting tool in the present invention are not limited.

It is a perspective view which shows the rotary blade type cutting tool which concerns on this invention. It is a disassembled perspective view which shows a rotary blade type cutting tool. It is a disassembled perspective view which shows a support means. It is a disassembled perspective view which shows a holder. It is a top view which shows a rotary blade type cutting tool. It is the EE sectional view taken on the line in FIG. It is sectional drawing which shows the principal part of a locking mechanism, (A) represents the state which the operation lever stood up, and (B) represents the state which the operation lever fell down. It is a figure which shows the usage example of the rotary blade type cutting tool which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotating blade type cutting tool 3 Rotating blade 13 Shaft 17 Operation lever 21 Holder 111 Upper cover body (pressure contact member)
A Support mechanism (support means)
B Lock mechanism C Engagement mechanism (engagement means)

Claims (4)

A plurality of rotating blades aligned in the blade thickness direction;
Support means for supporting the plurality of rotary blades such that at least one of the plurality of rotary blades is movable in the blade thickness direction;
A lock mechanism capable of regulating and locking the movement of the plurality of rotary blades in the blade thickness direction so that the plurality of rotary blades can be set and maintained at a desired interval;
A rotary blade-type cutting tool comprising: The support means includes a shaft extending in the blade thickness direction, and a plurality of holders supported by the shaft and supporting the plurality of rotary blades,
The rotary blade type cutting tool according to claim 1, wherein at least one of the plurality of holders is a movable holder that is movable in an axial length direction of the shaft.   The lock mechanism includes an operation lever and a pressure contact member that presses against the movable holder so as to prevent the movement of the movable holder when the operation lever is subjected to a predetermined operation. The rotary blade type cutting tool as described.   The lock mechanism includes engagement means that can be engaged with and disengaged from the operation lever, and the operation lever and the engagement means are engaged when the predetermined operation is performed on the operation lever. The rotary blade type cutting tool according to claim 3, wherein the operating state of the operating lever is maintained by the operation.

Images