JP3162491B2 - Paper cutter device and method of assembling the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to is incorporated into a facsimile machine or a copying machine or the like, paper cutter for cutting the roll paper, etc.
Apparatus and relates a method of assembling the blade in particular the edge of the round blade straight blade
The present invention relates to a paper cutter device of a round blade mounted type that cuts roll paper or the like by rotating the round blade along the straight blade while being pressed first, and a method of assembling the same .

[0002]

2. Description of the Related Art Conventionally, a paper cutter of this type has been used.
No. 62-117096InformationThus disclosed
Known paper cutter devices are known.In other words,
Prior art disclosed by JP-A-62-117096
(Hereinafter referred to as “Prior Art 1”)Is,Round blade supported on turret
The tool rest is rotatably supported by a shaft.
The tool post guide provided on the
Will be taken. The gear is fixed concentrically on the spindle of the round blade
This gear has a rack mounted parallel to the tool post guide.
It is meshing with the gear. On the other hand, fixed parallel to the tool post guide
The fixed blade edge and the round blade edge are slightly
Pressed in overlapping state.Also, knife
Tool post running in the form of a loop at both ends in the running direction of the base
Both ends of the row drive wire are anchored. Therefore, the drive
The wire is driven and driven by the
The tool post is guided by the tool post guide
Gear, the gear meshing with the rack gear rotates,
The round blade fixed coaxially with the spindle of the shaft also rotates.
You.

Also, Japanese Utility Model Laid-Open No. 4-17091 discloses
(Hereinafter referred to as "prior art 2").
Is a tool rest on which a round blade is rotatably supported.
On the tool post guide linearly provided on the
The round blade has a fixed blade on the side and a fixed blade on the lower edge.
Slightly inclined so that they touch each other, and
Slightly attach the fixed blade provided parallel to the
The round blade and the fixed blade are brought into contact with each other
And at the same time, counters the fixed blade with the support shaft of the round blade interposed.
On the rear side of the round blade on the opposite side and the tool post guide,
A roller rolling guide surface provided in parallel with the trajectory of the tool post
A rolling roller for rotating the round blade is interposed between
And press the support shaft whose tip is formed in the shape of a cone
Pressing the round blade against the fixed blade and the rolling roller
While rotating the round blade with the movement of the tool post,
Cut the paper etc. placed between the fixed blade and the round blade
Paper cutter. In this type of paper cutting device, to ensure the roll paper, and in order to improve cutting the incision, the round blade side of that is a straight fixed blade cutter
Make sure that the cutting edge of the round blade contacts the front line.
Provided so as slightly inclined, only the cutting edge surface of the cutting traveling direction of the round blade is required to be in contact with the edge line of the fixed blade.

Therefore, it has been proposed to solve this problem .
A paper cup described in Japanese Utility Model Laid-Open Publication No. 3-71893.
(Hereinafter referred to as “conventional technology 3”)
Guide grooves on both the upper and lower surfaces of the tool rest
A pair of upper and lower tool rests provided with the guide grooves in a straight line.
The tool post is fitted to the guide rail and the tool post guide rail is
Along the tool post guide rail.
While pressing the edge of the round blade against the fixed blade provided in parallel,
A paper cutter for cutting paper and the like placed between the round blade and the fixed blade.
A pair of upper and lower tool post guides
Vertical rail in the width direction center line of the blade material table guide groove
The tool post is provided so as to face each other in the plane.
The shape of the guide grooves on the upper and lower surfaces of the
To the minimum width in a plane perpendicular to
Formed in a bow tie shape that is wider than
Drive wire to make the guide groove width center line
Of the tool post at a position away from the plane perpendicular to the
It is anchored on both sides in the running direction.

Also, a paper cutter device proposed in Japanese Utility Model Laid-Open No. 4-17090 (hereinafter referred to as "prior art 4").
That. ) Is a tool post on which a round blade is rotatably supported.
A round blade is provided so that it can run on a tool post guide that is linearly provided.
The tip of the fixed blade provided parallel to the turret guide slightly
Overlap and contact the edge of round blade and fixed blade
While rotating the round blade between the round blade and the fixed blade.
A paper cutter that cuts placed paper, etc.
To the turret so that the spindle of the round blade can slide in the axial direction.
While supporting the support hole provided, and holding the support shaft of the round blade
With the side of the round blade opposite to the fixed blade and parallel to the turret guide
Rollers for rotating round blades between the provided roller rolling guide surface
Is inserted into the roller mounting hole provided on the tool post so that it cannot be dropped.
And press the round blade against the fixed blade and rolling roller by a leaf spring.
And the shaft of the bearing hole for supporting the shaft of the round blade
Only the tip of the round blade in the cutting travel direction contacts the fixed blade edge.
About 0.5 ° to 6 ° in the horizontal direction to tilt in the direction
And the entrance of the support hole is fitted with the support shaft 9
Round hole and tape only vertically toward the back.
A bearing hole that spreads in a pa shape and has a long cross section
Provided on the tool rest.

[0006]

In a facsimile machine and a copying machine, there is a demand for miniaturization like other office equipment, and it is inevitably required that a paper cutter device be miniaturized as much as possible. I have. However, the conventional technology
In surgery 1, since the to give the rotation more circular blade to the combination of gear and rack gear, it had become an obstacle to downsizing of the apparatus. Also, tilting the shaft of the circular blade from the need to accurately engage the core of formic Ya and rack gear becomes impossible, the side surface of the round blade to its becomes in contact parallel to the edge line of the fixed blade , Causing cutting failure.

[0007] Further, the prior art 2 cuts papers sharply.
In order to cut, the lower edge of the round blade overlaps the fixed blade.
Part must be pressed firmly against the fixed blade to make surface contact.
is there. Therefore, the friction between the round blade and the fixed blade increases.
Therefore, it is necessary to increase the driving force of the tool post,
For round blades, fixed blades, round blade pressing springs, and turret support holes
Wear is severe, parts must be replaced frequently,
It is disadvantageous for maintenance. In addition, the fixed blade is
Must be strong enough to withstand the strong pressing force of the round blade
The thickness of the fixed blade is limited.
Manufacturing costs increase.

[0008] The prior art 3 is characterized in that the upper and lower surfaces of a tool rest are provided.
The shape of the guide groove provided in the
The drive wire for running the tool post
At a position away from the plane perpendicular to the groove width center line to the round blade side
Since the tool post is fixed on both sides in the traveling direction, the traveling direction
When tension for running is applied to the drive wire of
The side of the bow-tie shaped guide groove abuts the guide rail
The tool post is rotated until it is
Round blade is tilted so that the leading end in the running direction presses against the fixed blade.
Beveled to form a press-contact cutting point between the fixed blade edge and the round blade edge
This presses a round blade against a fixed blade.
Does not have a round blade pressing spring for round blades and fixed blades
There is no function to automatically adjust the contact pressure slightly. Also,
Equipped with rolling rollers that rotate in contact with the rolling guides and round blades
There are no round blades that are driven
It rotates by the contact pressure with it. For this reason, round blades
If there is a gap between the cutting edge and the fixed cutting edge, poor cutting will occur.
Live.

[0009] Further, in the prior art 4, the support shaft of the round blade is used.
The shaft center of the supporting bearing hole that supports
Horizontal so that only the blade touches the fixed blade edge
In the range of about 0.5 ° to 6 ° in the direction
The entrance of the hole is a round hole that fits the support shaft,
Only spread tapered vertically Te, its cross section is rotatably supported only in a very narrow portion of the circular hole of the inlet portion of the receiving bore shaft of circular blade support shaft by a special shape such that the elongated hole ,
And automatically, but the predetermined inclination angle so that the given two points subjected to the back surface of the pressed round blade More fixed blade side biasing hand stage, i.e. contact and rolling of the fixed blade line connecting the contact point with <br/> the co b is apart heart or al in a round blade shaft
Because, the direction of the moment generated intends to become at right angles to the cutting edge line of the fixed blade always, the support shaft receives frictional resistance between the hole and the support shaft
And the angle of inclination of the round blade due to wear in the bearing holes
Decreases, becomes dull, and eventually becomes uncut
There were drawbacks.

[0010] The present invention has been made in view of the above circumstances, Rukoto fixed blade is surely performed disconnected without distorted during use robust yet be of lightweight, assembling production is very it is easy, it is possible to reliably rotate the rotating circular blade in the cutting direction with the travel of the tool rest Turkey
If always the side of the rotary circular blade can be held at the correct angle of inclination with respect to the cutting edge line of the straight fixed blade Rukoto, miniaturization of the frictional resistance smaller to apparatus shaft of the rotary circular blade is achieved that it,
And its object is to provide an assembly how the paper cutter device and its capable of realizing.

[0011]

A turret on which a rotary round blade is rotatably supported is rotatably provided on a linearly provided turret guide, and the cutting edge of the rotary round blade is attached to the turret guide. in a paper cutter device for cutting the sandwiched by the sheet or the like between the rotated traveling rotary circular blade while pressed against the blade edge of the fixed blade provided in parallel times Utatemaru blade and the fixed blade, spot base metal A fixed blade that is temporarily fixed by welding or projection welding and is integrally joined to the base metal with an adhesive that has permeated and solidified on the contact surface, and a roller rolling formed on the front surface of the fixed blade
As the guide surface is in parallel form a fixed blade, a tool rest guide mounted at both ends of the base metal Niso, a plurality of rolling
The roller is the tip of the rotating shaft in the cutting direction.
The point of contact between the cutting edge and the fixed cutting edge, and the side of the rotating round blade and the foremost
Formed by two contact points with the top and rearmost rolling rollers
In the positional relationship existing within the triangle, while abutting from the back of the rotating round blade, a part of the plurality of rolling rollers
Wherein it is disposed so as to contact the roller rolling guide surface, and the support shaft of the rotary circular blade supporting bearing hole of the tool rest is infested host
And a tool rest provided with a leaf spring for pressing the rotary round blade against a fixed blade edge and a plurality of rolling rollers.

According to a second aspect of the present invention, there is provided a tool rest on which a rotary round blade is rotatably supported on a linearly provided tool rest guide. assembly paper cutter device for cutting the sandwiched by the sheet or the like between the in the blade workpiece stage guide is rotated traveling rotary circular blade while pressing against the edge of the fixed blade provided in parallel times Utatemaru blade and the fixed blade <br/> The method according to claim 1, wherein the fixed blade is spot-welded or
A first step of temporarily bonding by projection welding and then infiltrating and solidifying an adhesive between the two and joining them together;
A second step of mounting a tool post guide having roller rolling guide surfaces at both ends of the base metal in parallel with the fixed blade, and a roller mounting hole in which a part of the circumference of some of the rolling rollers is a tool post. Before
Protruding from the rear surface and pushing against the roller rolling guide surface and the side of the rotating round blade
The part of the circumference of the other rolling rollers is in contact with the front of the tool post.
Is formed so that it can protrude from
Turret is mounted on the turret guide so that it can run,
Contact the roller mounting holes from multiple locations on the back of the rotating
By contacting, the rotary round blade is driven to rotate,
The cutting edge in the cutting direction comes into contact with the fixed cutting edge at one point.
A plurality of rolling rollers are tilted so that the support shaft of the rotary round blade is loosely fitted in the support hole of the tool post, and then the rotary round blade is pressed against the fixed blade and the plurality of rolling rollers. the leaf spring and sequentially carrying out the third step of attaching the tool rest in contact
Was.

[0013]

[Action] Next, to explain the action of the present invention, support shaft rotating circular blade is attached is pressed in the direction of the tool rest by the leaf spring, rotating circular blade in the opposite upper and cut the running direction
Since will be pressed against a plurality of rolling rollers abutting the rear in poor side, rotary circular blade cutting traveling direction the tip of the cutting edge of the rotary circular blade inclined at a predetermined angle with respect to the fixed blade <br / > Only the fixed blade can be accurately tilted so that it contacts the cutting edge, and the driving force of the rolling rollers and the friction between the rotating round blade and the fixed blade
A stable rotation is given to the rotating round blade by the force. Also,
Since the support shaft is inserted loosely into the support shaft receiving hole, because it is possible to freely swing in any direction to the inlet of the shaft receiving hole in that range as a fulcrum, and the support shaft receiving hole
The frictional resistance between the rotating round blade and the support shaft is reduced. others
Reduce the material and weight of the turret and the spindle of the rotating round blade
And the motor for driving and driving the tool post is small.
It can be typed. In addition, fixed blades spot on the base metal
Temporarily fixed by welding or projection welding
After that, the adhesive is infiltrated and solidified between them, and they are joined together.
The fixed blade can be lightweight and strong
There is no distortion during use. Furthermore, the times
The spindle of the rolling round blade is fixed to the cutting edge of the rotating round blade in the cutting direction.
The point of contact with the blade edge, and multiple points of contact with the rotating round blade and rolling rollers
, The contact between the rotary blade and the fixed blade is ensured, and the rotary blade reliably cuts the roll paper while rotating. On the other hand, as an assembly method
Spot welding or projecting the fixed blade onto
After temporarily fixing by welding,
It is solidified and joined together.
A tool post guide with a fixed surface is mounted in parallel with the fixed blade.
The tool post with the specified processing at the specified position.
Mounted on the guide so that it can run, and multiple rolls
A rotating roller is attached to the support hole of the tool post with a moving roller.
After loosely fitting, press the rotating round blade against the fixed blade and rolling roller.
The steps to attach the leaf spring to the tool post
Paper cutter device that can reliably cut paper just by using
Can be easily assembled.

[0014]

Next, embodiments of the present invention will be described with reference to the drawings. FIGS. 1 to 3 show an embodiment of the present invention. In the drawings, the same or equivalent parts as those of the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted. FIG. 1 is an exploded perspective view of the present embodiment, FIG. 2 is an exploded perspective view of a base and a fixed blade and a tool rest guide, FIG. 3 is a front view of a rotary round blade portion, and FIG. It is the top view which carried out the partial cross section. In FIG. 1 and FIG. 2, the fixed blade 2 is formed by cutting a SUS steel which has been subjected to continuous heat treatment of a hoop steel material, performing blade grinding, and press-forming SECC steel material to form several small projections for welding on the upper surface. After temporarily fixing the upper surface of the U-shaped base metal 7 by spot welding or projection welding, a one-part, anaerobic adhesive is allowed to penetrate into the gap between the two, and then heated to about 60 ° C. to promote hardening. And join them together. Projections 7a for fixing the tool post guide 4 are extended from both ends of the base metal 7, to which the fixed blade is integrally joined, and the tool post guide 4 is screwed to the projecting portion 7a. A small piece 7b to be stopped is formed. Reference numeral 7c denotes a small roller for suspending the tool post traveling wire 31. Attachment of the tool post guide 4 is performed by attaching both ends of the tool post guide 4 with screws using small pieces 7b formed on projecting pieces 7a for attaching the tool post guide 4 formed at both ends of the U-shaped base metal 7. The tool post guide 4 is fixed and attached in parallel with the fixed blade 2. However, at this time, a gap is provided between the tool post guide 4 and the fixed blade 2 such that one sheet of paper passes therethrough.

The tool rest 3 is movably mounted on the tool rest guide 4 provided in a straight line.
At both ends in the traveling direction, a tool post traveling wire 31 formed in a loop and traveling by a driving means (not shown) is locked, and the driving means moves the tool post 3 in the left-right direction. The tool post 3 is provided with a support hole 14 for supporting the support shaft 9 of the rotary round blade 1, and the support hole 9 of the rotary round blade 1 is supported by the leaf spring 11 in the support hole 14. The rotary round blade 1 is pivotally supported so as to be pushed in the direction of the table 3.
The rotary round blade 1 has an outer diameter that slightly overlaps and comes into contact with the cutting edge of the fixed blade 2 provided in parallel with the tool rest guide 4.

The tool rest 3 has an upper portion opposite to a contact point with the fixed blade 2 with the support shaft 9 of the rotary round blade 1 interposed therebetween.
Two roller mounting holes 1 on the lower side in the cutting traveling direction
2 and 13 are provided. These roller mounting holes 12,
13 is sized so that the rolling rollers 6 and 10 are rotatable but can be held with little play .
And the rolling roller 6 pressed against the roller rolling guide surface is attached.
The roller mounting holes 12 are formed from the front and rear surfaces of the tool post 3 on the other side.
The roller mounting hole 13 in which the rolling roller 10 is mounted is a blade
A part of each rolling roller can protrude from the front surface of the base 3.
It has a cruciform structure . And the roller mounting hole 12
The roller 6 is provided such that the roller 6 has a rotation axis substantially perpendicular thereto and the outer peripheral surface of the roller 6 comes into contact with the roller roller guide surface 5. In the roller mounting hole 13, the rolling roller 10 is provided with the axis of the rotation axis thereof as the support shaft 9 of the rotary round blade 1.
And is rotatable by the shaft 10a so as not to come out behind the tool rest 3.

Further, as shown in FIGS. 3 and 4, the rolling rollers
6, 10 are attached to the roller mounting holes 12 and 13 described above.
The rolling rollers 6 are rotated by the tool post.
The rotating round blade 1 is driven to rotate by contacting and rotating with the moving guide surface 5.
And cooperates with the rolling rollers 10 to rotate.
The cutting edge of the round blade 1 in the cutting direction and the cutting edge of the fixed blade are one point.
It is to incline exactly so as to make contact. And the contact A between the cutting direction leading end edge and the cutting edge of the fixed blade 2 in rotation round blade 1 for their contacts B of the rotary circular blade 1 and the two rolling rollers 6 and 10, the triangle formed by the C In the support shaft 9 of the rotary round blade 1
There is an axis O of In addition, the entrance of the support hole 14 is a round hole into which the support shaft 9 is rotatably fitted. In any direction with the entrance as a fulcrum
You can swing freely .

The bearing hole 14 is formed as described above.
With this, the mounting groove 16 formed in the tool post 3 is
The tool rest 3 is fixed via the steel ball 15 by the fixed leaf spring 11.
Of the rotary round blade 1 being pressed in the directionCutting direction tip edge
Is the fixed blade 2 described above.Cutting edge lineMaintain a certain slope with respect to
While holding, the cutting edge of the fixed blade 2 and the rolling rollers 6 and 10
Since the tool post 3 is automatically pressed into contact with both, the tool post 3 travels and moves.
The roller 6 rolls on the roller guide surface 5
Of the fixed blade 2 and the rotating round blade 1
By contact with the cutting edge,Cutting by rotating around the rotary blade 1
Direction rotation, and roll paper cuttingGenerates paper dust
Clean withoutDone.

In the embodiment of the present invention, the rotating round blade is
Although a one-way cutting type apparatus having only one piece is illustrated, the present invention is not limited to this embodiment, and may be a double-type paper cutter apparatus configured to be capable of cutting in both left and right directions. It goes without saying that the scope described in the claims is included in the present invention. Although the example in which the shape of the rolling rollers and the roller mounting holes are cross-shaped is illustrated, the shape may be a simple cylinder, or a sphere may be employed as the rolling rollers. Not even
Ku, a few more of the rolling roller both have good as three or more. Although the tool post guide, the tool post, the support shaft, the leaf spring, and the leaf spring mounting plate are illustrated in detail, the present invention is not limited to these shapes, and is not limited to the illustrated shape. Sa
In addition, as a spindle swing mechanism, go to the back with a spindle of the same diameter
The combination of the bearing holes that spread out like a trumpet according to
As shown, a set of support holes with the same diameter as the tapered support shaft
It may be a combination. Furthermore, the rotating round blade is a fixed blade
An outer diameter that slightly overlaps and makes contact with the cutting edge
That protrudes below the lower edge of the fixed blade.
It may be a diameter.

[0020]

As described above, according to the first aspect of the present invention, a rotary round blade is mounted on a tool post by a leaf spring.
Pressed against a plurality of rolling rollers, the rotating round blade can be reliably rotated in the cutting direction as the tool post travels, and the blade surface of the rotating round blade can be easily fixed to a straight fixed blade. The cutting edge line can always be inclined at a predetermined angle to be surely brought into contact with the cutting edge line, so that good cutting can be performed and it is also suitable for cutting a thick material . In addition, since the fixed blade is temporarily fixed to the base metal by spot welding or projection welding , the adhesive is permeated and solidified between them and joined together, so that the fixed blade can be lightweight and strong. It is carried out to ensure the cutting because there is no be distorted during use, such that there is no need to pay particular attention. Furthermore, the conventional rack gear, formic ya like becomes unnecessary, the rotary circular blade thereon
Since no frictional resistance occurs between the support shaft and the support bearing hole ,
The material and weight of the turret, support shaft, and leaf spring are reduced , and the size of the motor can be reduced.As a result, the size and weight of the paper cutter device can be reduced, and the life of parts can be extended.
Cost can be reduced. Further, in claim 2
According to the present invention, the paper cutter device is operated according to the procedure.
Can be easily assembled and manufactured,
The cost of assembling and manufacturing is greatly reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of one embodiment of the present invention.

FIG. 2 is an exploded perspective view of a fixed blade and a tool rest guide of the present embodiment.

FIG. 3 is an explanatory front view of the rotary round blade of the embodiment.

FIG. 4 is an explanatory plan view of a main part of the present embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 rotating round blade 2 fixed blade 3 turret 4 turret guide 5 roller rolling guide surface 6,10 rolling roller 7 base metal 7a base metal projection 7b small piece 7c small roller 9 support shaft 11 leaf spring 12,13 roller Mounting hole 14 Support hole 15 Steel ball

Claims (2)

(57) [Claims] 1. A tool rest on which a rotary round blade is rotatably supported on a tool rest guide linearly provided on a tool rest guide.
Sandwiched between the rotary circular blade cutting the rotary circular blade is rotated travel while pressed against the blade edge of the fixed blade provided in parallel to the blade material table guides times <br/> Utatemaru blade and the fixed blade In a paper cutter device for cutting the cut paper and the like, the base plate is temporarily fixed by spot welding or projection welding , and the adhesive that has permeated and solidified on the contact surface.
The fixed blade integrated with the base metal and the roller rolling guide surface formed on the front face are parallel to the fixed blade
As will become Jo, the tool rest guide mounted at both ends of the base metal Niso, a plurality of rolling rollers is the axis of the support shaft of the rotary circular blade whose switching
The point of contact between the cutting edge and the fixed cutting edge, and the rotating round blade side
Two points of contact between the surface and the front and rearmost rolling rollers
In the positional relationship existing within the formed triangle, the rotating round blade abuts from the back and the plurality of
B is arranged so that a part of it contacts the roller rolling guide surface.
Is, and the rotary circular blade support shaft supporting the bearing hole of the tool post is loosely fitted in a freely movable and omnidirectional swing infested, further presses against the rotating circular blade to the fixed blade edge and a plurality of rolling rollers paper cutter device, characterized in that it comprises a tool rest provided with a leaf spring, a. 2. A tool rest having a rotary round blade rotatably supported on a tool rest guide linearly provided on a tool rest guide.
Is sandwiched between the rotating round the cutting edge of the blade edge of the fixed blade provided in parallel to the blade material table guide rotates travel rotary circular blade while pressing contact times <br/> Utatemaru blade and the fixed blade in the assembly method of the paper cutter device for cutting the paper or the like, spot welding or Projection the fixed blade to the base metal
After temporarily fixing by welding ,
A first step of solidifying and joining together, a second step of mounting a tool rest guide having roller rolling guide surfaces at both ends of the base in parallel with the fixed blade, and a plurality of roller mounting holes, The axis of the spindle of the rotary round blade is
In the cutting direction, the point of contact between the cutting edge and the fixed cutting edge, and rotation
Two contacts between the round blade side and the foremost and rearmost rolling rollers
Point, the positional relationship that exists within the triangle formed by
Roll, which is pressed into contact only with the side of the rotating round blade.
The roller mounting hole where the moving roller is mounted is the blade of the rolling roller
The turret that has been subjected to retaining processing to the rear of the pedestal is
Mounted on the guide so that it can run, and
Rotation by contacting from multiple places on the back of the rolling round blade
In addition to rotating the round blade, the cutting edge
A plurality of rolling rollers that incline so that the fixed blade comes into contact at one point are mounted, and after the support shaft of the rotary round blade is loosely fitted in the support hole of the tool post, the rotation is performed. 3. A method for assembling a paper cutter device according to claim 1, comprising: a third step of attaching a leaf spring for pressing a round blade to a fixed blade and the plurality of rolling rollers to a tool post.