JP2883015B2 - Sheet cutting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet cutting device, and more particularly to protection of a movable cutter and a cutter driving device.

[0002]

2. Description of the Related Art In an image recording apparatus such as a cash register or a ticket issuing apparatus such as a mini printer or a copying machine, a sheet cutting apparatus is used for cutting a band-shaped sheet such as paper or film. One such sheet cutting apparatus is described in JP-A-6-210596. This sheet cutting apparatus has (a) an apparatus main body and (b) a flat plate-shaped cutting edge formed at a leading edge thereof, and is supported by the apparatus main body so as to be movable in a direction crossing the cutting blade. With a movable cutter,
(C) a fixed cutter provided in the apparatus main body, which cuts the belt-shaped sheet along a cutting line intersecting with the longitudinal direction thereof in cooperation with the movable cutter; (d) a driving source; and a movable and driven by the driving source. A cutter driving device having a driving member engaged with the cutter, for moving the movable cutter to a cutting position for cutting the band-shaped sheet in cooperation with the fixed cutter, and for retracting the movable cutter to the original position; and (e) a movable cutter. And a relative movement permitting device that allows the movable cutter and the driving member to move relative to each other when a load in a retreat direction greater than a set value is applied to the movable cutter during forward movement.

The relative movement permitting device has a structure in which a driving member of a driving device and a sliding plate are provided on the lower surface and the upper surface of a movable cutter via slip films, respectively, and a flat spring is disposed on the upper surface of the sliding plate. It has become. The driving member, the movable cutter, the sliding plate and the flat spring are tightened by the screw and the nut, whereby the flat spring is bent, and the restoring force causes a frictional force between the driving member and the sliding plate and the movable cutter. Is to happen. For example, depending on whether the band-shaped sheet has a thickness greater than or equal to the thickness at which the movable cutter can be cut, or whether the band-shaped sheet is made of a material that cannot be cut by the movable cutter,
When a load in the retreating direction larger than the frictional force is applied to the movable cutter when the movable cutter advances, the movable cutter and the driving member are allowed to move relative to each other, so that an excessive load in the retreating direction is applied to the movable cutter. Without being added, damage to the movable cutter and cutter drive is avoided.

[0004]

However, the relative movement permitting device has a problem that it is difficult to stabilize the allowable load of the relative movement. This is because the relative movement permitting device defines the relative movement permitting load by the frictional force between the driving member and the sliding plate and the movable cutter, and it is generally difficult to accurately control the magnitude of the frictional force. SUMMARY OF THE INVENTION It is an object of the present invention to provide a sheet cutting apparatus capable of easily and accurately setting a load allowing relative movement between a movable cutter and a driving member.

[0005]

According to a first aspect of the present invention, there is provided an apparatus main body, (b) a movable cutter,
(C) fixed cutter, (d) cutter driving device, and (e)
In a sheet cutting device including a relative movement allowing device, the relative movement allowing device is connected to a driving member of a cutter driving device and a movable cutter.
One side of the movable cutter is provided at right angles to the plate surface of the movable cutter.
Fixing pin and the other of the driving member and the movable cutter
A fitting hole that is provided and can be fitted with the engaging pin and the fitting hole
Extends in a direction parallel to the direction of movement of the movable cutter
A slot having a neck narrower than the diameter of the engaging pin;
And an elastic engagement portion having
The load in the backward direction of the movable cutter is
When it reaches, the engaging pin is formed on the side that moves from the fitting hole.
It is solved by doing. In the second invention,
The elastic engagement portion in the first invention is formed by punching a plate material.
It is formed. In the third invention, the first or second invention
The slot of the elastic engaging portion at the end opposite to the neck
Section has a tapered section that gradually decreases in width as it approaches the neck.
It is assumed that. In the fourth invention, the first to the fourth
In any one of the three inventions, the elastic cutter may be a movable cutter.
Are formed integrally with the flat plate member that forms In the fifth invention
In any one of the first to third inventions,
The engaging portion is formed on a plate-shaped member separate from the movable cutter,
Fixed to a movable cutter.

[0006]

In the sheet cutting device of the first invention, the engagement pin
Is fitted in the fitting hole of the elastic engaging portion. In this fitting hole
Slots are connected, but this slot is
Because it has a neck that is narrower than the diameter, it is
The pin cannot pass through this neck, and the engagement pin
The engaged state is maintained. Therefore, the cutter drive
Driving operation to move the moving cutter to the cutting position
Is transmitted to However, the band-shaped sheet is cut by the movable cutter
The elastic cutter is attached to the movable cutter
Excessive load in the backward direction exceeding the elastic deformation resistance of
Then, the engagement pin elastically deforms the elastic engagement portion while the neck portion
Through the slot and disengaged from the fitting hole through the slot. The result
As a result, the driving operation of the cutter driving device is transmitted to the movable cutter.
The movable cutter and cutter
It is not added to the drive.

Further, according to the third invention, the slot is tapered.
If the portion is provided, after the engagement pin separates from the elastic engagement portion,
To return to the engaged state, that is,
It is easy to return the anti-movement permitting device to its initial state.
Become. The movable cutter and the driving member
If a force in the opposite direction is applied, the engagement pin will
Guided toward the neck and elastically deform the elastic engaging portion.
While passing through the neck and returning to the state fitted with the fitting hole.
is there.

[0008]

As described above , according to the first aspect, the magnitude of the load that causes the movable cutter and the driving member to move relative to each other is determined by the elastic deformation resistance of the elastic engaging portion . Engagement
When the pin is disengaged from the elastic engagement portion , of course, a frictional force acts between the two , but the main role of preventing the disengagement is elastic deformation resistance, as in the sheet cutting device described in JP-A-6-210596. Not friction. And
Since the elastic deformation resistance can be easily controlled to be constant compared to the frictional force, the relative movement allowable load of the relative movement allowable device can be accurately set in the sheet cutting device according to the first invention. Therefore, the relative movement allowable load is too small, and the operation of the movable cutter is prevented when unnecessary, and conversely, the relative movement allowable load is too large,
Damage to the movable cutter and the drive device is both well avoided. Furthermore, it is possible to manufacture the relative movement permitting device at low cost
Can be. Of course, the configuration of the engagement pin is simple,
The elastic engaging part also has a simple fitting hole, slot, neck, etc.
For example, a plate made of spring steel is
Can be manufactured by simple processes such as
After all, the relative movement permitting device can be manufactured at low cost.
It is.

Also, as in the second invention, the elastic engagement
If the part is formed by punching a plate material, elasticity as described above
The engaging portion can be manufactured at a low cost, and the fourth aspect of the present invention
A flat plate part that forms a movable cutter with an elastic engagement part
If they are formed integrally with the material, the number of parts can be reduced. one
On the other hand, as in the fifth invention, a plate separate from the movable cutter
If it is formed on a movable member, the movable cutter and the elastic
It is possible to use plate materials of appropriate thickness and material.
You. Furthermore, as in the third invention, the slot is tapered.
Once the part is provided, it operates once and the movable cutter
Restore the relative movement permitting device that allows relative movement to the initial state.
Return to the standby state for the next operation.
It will be easier.

[0010]

Preferred embodiments of the present invention will be described below. (1) The engaging pin is provided on the movable cutter,
An elastic engagement portion is provided on the driving member.
A sheet cutting device according to any one of the preceding claims. (2) The elastic engaging portion, wherein the includes a pair of claw portions extending in parallel to the moving direction of the movable cutter, according to claim 1 which forms with said fitting hole and the slot between them a pair of claw portions ~
5. The sheet cutting apparatus according to any one of aspects 1 . (3) the apparatus main body has a base plate having a first opening extending in parallel with the moving direction of the movable cutter, and a second opening extending in parallel with the first opening and having a width smaller than the first opening; A first support plate fixed to the first surface of the base plate, and a third opening extending in parallel with the first opening and having a width smaller than the first opening, and having a third opening opposite to the first surface of the base plate; A second support plate fixed to a second surface, while the driving member extends substantially perpendicularly from both front and rear ends of the substrate portion that can be fitted into the first opening; The sheet cutting device according to claim 1, further comprising: a pair of arm portions penetrating the second opening. (4) The sheet cutting device according to aspect 3 , wherein the movable cutter is slidably disposed on a surface of the second support plate opposite to the base plate. (5) Aspect 4 further including a cover plate fixedly slidably sandwiching the movable cutter in cooperation with the second support plate and fixed to the base plate.
3. The sheet cutting device according to claim 1. (6) Further, the movable cutter protrudes from at least one of the cover plate and the second support plate toward the other at a height slightly larger than the thickness of the movable cutter, and secures a sliding gap of the movable cutter between the two plates. The sheet cutting device according to aspect 5 , including a plurality of gap securing projections. (7) The front end of the cover plate extends beyond the front ends of the base plate, the first support plate and the second support plate, and the extended portion extends in the direction intersecting the moving direction of the movable cutter. Aspect 5 or 8 wherein an elongated slot is formed, and a portion forming a front edge of the slot forms the fixed cutter.
7. The sheet cutting device according to 6 . (8) The stopper according to any one of claims 1 to 5, further including a stopper that contacts the movable cutter in a state where the movable cutter is retracted to the original position and prevents further retreat. Sheet cutting equipment.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a cash register sheet cutting apparatus will be described in detail with reference to the drawings. In FIG. 1, reference numeral 10 denotes a cover plate. The cover plate 10 has a flat plate shape, and a slot 12 extending in a direction perpendicular to the longitudinal direction is formed at a front end portion which is one end portion in the longitudinal direction or the front-rear direction.
Is a fixed cutter 14. Although not shown, the fixed cutter 14 is configured to slightly descend from both ends to the center,
It has a shape curved in an arc shape in a direction perpendicular to the longitudinal direction. Paper 16 as a band-shaped sheet shown in FIG.
Is wound in a roll and is sent through a slot 12. As described above, if the fixed cutter 14 is formed integrally with the cover plate 10 and the cover plate 10 is a component of the apparatus main body, the fixed cutter 14 can be easily held by the apparatus main body, and will be described later. Sliding contact with the movable cutter 48 is also facilitated.

An opening 18 extending in the longitudinal direction is formed at the center of the cover plate 10, and a pair of projections which are projected downward by half-shear as stoppers 20 are formed at the rear end. Also, the stopper 20 and the opening 18
A pair of through holes 22 are formed in the longitudinal direction between the cover plate 10 and both side ends of the cover plate 10. These through holes 22 are for inserting screws to fix the cover plate 10 to other members, as described later.

A base plate 24 is disposed below the cover plate 10 with a space therebetween, and the tip of the base plate 24 is bent downward to increase the rigidity of the base plate 24. A first opening 26 extending in the longitudinal direction is formed at the center of the base plate 24. In the periphery of the first opening 26, a female screw hole 28 into which a screw that has passed through the through hole 22 of the cover plate 10 is screwed is provided at a position corresponding to the through hole 22, and with another member from below. A plurality of female screw holes 30 into which screws for fixing are screwed are formed symmetrically on both sides of the first opening 26, respectively.

A first support plate 32 is provided below the base plate 24, and a second opening 34 narrower than the first opening 26 is formed in the center of the first support plate 32.
A plurality of through holes 36 are formed at positions corresponding to the female screw holes 30 in the peripheral portion of the second opening 34, and screws passing through these through holes 36 are screwed into the female screw holes 30 of the base plate 24. Thereby, the first support plate 32 is fixed to the base plate 24. Above the base plate 24, a second support plate 38 is provided, and a third opening 40, which is narrower than the first opening 26, is formed in the center thereof in the longitudinal direction. A plurality of through-holes 42 through which screws pass through from the upper side through the cover plate 10 are formed in the peripheral portion.
Through the female screw hole 28 of the base plate 24.
To fix the cover plate 10, the second support plate 38, and the base plate 24.

As described above, the base plate 24
The first support plate 32 is screwed with a screw from below.
When the cover plate 10 and the second support plate 38 are fixed to the base plate 24 by the screwing of the screws from above as described above, the cover plate 10, the second support plate 38, and the base plate 24 And all the first support plates 32 are fixed to each other. The four members constitute an apparatus main body of the sheet cutting apparatus of the present embodiment.

At the periphery of the third opening 40, a plurality of gap securing projections 44 are arranged in the longitudinal direction, and another plurality of gap securing projections 46 are formed therebetween and face upward in pairs. It is made to protrude. These gap securing projections 4
Reference numerals 4 and 46 are for securing a gap between the cover plate 10 and the second support plate 38 for holding the movable cutter 48 so as to be movable in the longitudinal direction, and the height thereof is greater than the thickness of the movable cutter 48. It is slightly larger. Further, the gap securing projections 44, 4 arranged on both sides of the third opening 40.
The distance between the paired members of the movable cutter 6 is
Is slightly wider than the width of the gap securing projections 44 and 4.
6 also functions as a guide for guiding the movable cutter 48 in the longitudinal direction. A female screw hole 50 is formed at the center of the gap securing projection 44, and screws are screwed into the female screw holes 50 through the cover plate 10, so that the cover plate 10 and the second support plate 38 are connected to each other. And the movable cutter 48 is slidably held therebetween. At the rear end of the second support plate 38, a pair of through-holes 51 are formed at positions corresponding to the bosses as the stoppers 20 formed on the cover plate 10 to allow the bosses to be fitted.

The movable cutter 48, which is disposed between the cover plate 10 and the second support plate 38,
As shown in FIG. 1, a plate-shaped spring steel plate is punched, quenched and tempered, and then ground. At the tip of the movable cutter 48, a cutting edge forming portion wider than other portions is provided. A cutting edge 54 is formed at the leading edge of the cutting edge forming portion.
Is closer to the rear end side toward the center in the width direction of the movable cutter 48. The cutting blade 54 includes a pair of gentle cutting blades 52 having a relatively small inclination angle with respect to a straight line orthogonal to a center line parallel to the cutter traveling direction, and a pair of steep cutting blades 53 having a relatively large inclination angle. Contains. A notch 55 is provided at the center of the cutting edge 54, and each steeply cutting edge 53 is provided between each gentlely inclined cutting edge 52 and the notch 55. When cutting the paper 16, in the case of a V-shaped cutting blade having only one inclination, the corner formed between the cutting blade and the notch 55 is easily caught by the edge of the fixed cutter 14 and passes through the edge. When the resistance is large. On the other hand, in the case of the cutting edge 54 in the present embodiment, the gentle inclined cutting edge 52 and the notch 55
And the steep cutting edge 53 provided between the fixed cutter 14 and the edge of the fixed cutter 14 can be alleviated, so that the resistance during passage can be reduced.

Guide pieces 56 are provided at both ends of the cutting blade 54 in the longitudinal direction. These guide pieces 56 are shown in FIG.
In the figure, the surface on the other side is inclined toward the front side as it advances toward the front end. However, FIG. 3 is a bottom view of the movable cutter 48. In the assembled state, the surface appearing in FIG. 3 is the second support plate 38 side. The upper surface thereof is inclined toward the lower side toward the tip, and the cutting blade 54 engages with the lower surface of the fixed cutter 14 before cutting the paper 16 in cooperation with the fixed cutter 14, It guides the engagement of the cutting blade 54 with the fixed cutter.

A notch is formed at the rear end of the movable cutter 48, and a stopper surface 49 is formed on the bottom surface of the notch so that the stopper 20 can be brought into contact therewith. When the movable cutter 48 is retracted, the stopper surface 49 is formed. Is brought into contact with the stopper 20, the retreat limit of the movable cutter 48 is defined. At the center of the movable cutter 48, an opening 61 is formed to be long in the cutter moving direction, and an elastic engaging portion 57 integral with the movable cutter 48 extends from the rear edge of the opening 61. The elastic engaging portion 57 includes a pair of claws 58 and 59 extending in parallel to the cutter moving direction.
A fitting hole 60 and a slot 62 are formed between 8, 59. The slot 62 has a neck portion 64 having a width smaller than the diameter of the fitting hole 60, and a tapered portion 66 gradually expanding from the neck portion 64 toward the cutting blade 54.

Further, a notch 72 extends from the fitting hole 60 in a direction opposite to the slot 62. The notch 72 has a neck 68 having a width smaller than the diameter of the fitting hole 60 and an elongated hole 70 extending from the neck 68 in a direction away from the cutting blade 54.
And As a result, the fitting hole 60 is inserted into the claw portions 58, 5
9, the width of the base ends of the claws 58, 59 is reduced, and the elastic deformation of the claws 58, 59 in the direction in which the width of the neck 64 is increased is facilitated. Has become.

As shown in FIG. 2, the base plate 2
The substrate 74 of the driving member 73 is fitted in the first opening 26 of the fourth member 26 so as to be movable in the cutter moving direction, and a pair of arms 76 and 78 extend substantially perpendicularly from both front and rear ends of the substrate 74. And penetrates through the second opening 34. As shown in FIG. 1, a through hole 80 is formed in the center of the substrate 74, and the leg 83 of the engaging pin 82 is fitted therein until the flange 84 contacts the upper surface of the substrate 74. Then, the engaging pin 82 is fixed to the substrate 74 by caulking the protruding end of the leg 83 protruding from the through hole 80. After being fixed, the engaging pin 82 projects upward at a right angle from the upper surface of the substrate portion 74, penetrates through the third opening 40 of the second support plate 38, and has a distal end portion at the elastic engaging portion of the movable cutter 48. Fitting hole 60 provided in 57
Can be fitted. These substrate part 74, arm part 76,
The drive pin 73 and the engagement pin 82 constitute the drive member 73.

When the movable cutter 48 is moved forward and a load in the retreating direction is applied to the movable cutter 48, the elastic engaging portion 57 elastically deforms and the engaging pin 82 Is allowed. The elastic engagement portion 57 and the engagement pin 82 constitute a relative movement permitting device that permits the relative movement between the movable cutter 48 and the driving member 73 at the time of overload.

The assembling work of the sheet cutting section described above includes:
It is easy if you follow the steps below. In FIG. 1, first, a movable cutter 48 is fitted between the spacing securing projections 44 and 46 of the second support plate 38, covered with the cover plate 10 from above, and fixed with screws. Thus, an upper assembly including the cover plate 10, the movable cutter 48, and the second support plate 38 is obtained. On the other hand, the first support plate 32 is fixed to the base plate 24 with screws, and the driving member 73 to which the engaging pin 82 has been fixed in advance is fitted into the recess formed as a result. Thus, a lower assembly including the base plate 24, the first support plate 32, and the driving member 73 is obtained. Finally, the upper assembly is placed on the lower assembly while fitting the engagement pins 82 and the fitting holes 60, and the two assemblies are fixed with screws, whereby the assembly of the sheet cutting section is completed.

The sheet cutting section is driven by a cam 88 as shown in FIG. A cam 88 is fitted between the pair of arms 76 and 78 of the driving member 73. Cam 8
Numeral 8 is attached to a rotating shaft 90 that is rotated by an electric motor as a drive source (not shown) so as to be relatively unrotatable. The cam 88 is an eccentric cam having a cylindrical cam surface 92 eccentric with respect to the axis of the rotating shaft 90. The position of the cam surface 92 farthest from the axis of the rotating shaft 90 is defined as the long diameter portion 9.
4. The closest position is referred to as a short diameter portion 96. This cam 88
Is rotated so that the driving member 73 rotates the rotation shaft 90.
The movable cutter 48 is moved linearly in a direction orthogonal to the rotation axis of the movable cutter 48. The driving member 73, together with the cam 88, constitutes a motion conversion mechanism for converting rotation into linear movement. The motion conversion mechanism constitutes a cutter driving device together with the electric motor.

The electric motor always rotates while the power of the cash register is ON.
It is a common driving source for each device of the cash register,
The rotation is transmitted to the rotation shaft 90 only when necessary, that is, only when the paper 16 is cut. This rotation transmitting device is disclosed in, for example, Japanese Utility Model Application No.
It can be configured in the same manner as in the sheet cutting device described in the specification of JP-A-61728.

In the sheet cutting apparatus constructed as described above, the cam 88 normally has a short diameter portion 96 on the inner side surface of the arm portion 76 of the driving member 73 and a long diameter portion 94 on the rear side, as shown in FIG. And the distal end of the engaging pin 82 is fitted into the fitting hole 60 of the elastic engaging portion 57, and the movable cutter 48.
Is at the original position where the stopper surface 49 abuts or approaches the stopper 20.

When it is necessary to cut the paper 16, the rotating shaft 90 is rotated once. First, the cam 88 is rotated half a turn in the direction indicated by the arrow in FIG. 2 to move the driving member 73 forward and move the movable cutter 48 forward. If the paper 16 is thin and the movable cutter 48 is of a thickness that can be cut, the movable cutter 4
8 is equal to or less than the elastic deformation resistance of the elastic engaging portion 57, the engaging pin 82 does not disengage from the engagement with the fitting hole 60, and as shown in FIGS. The movable cutter 48 is advanced integrally with the driving member 73.

Here, since the fixed cutter 14 is slightly curved downward as described above, the movable cutter 48
As the upper surface of the movable cutter 48 contacts the lower surface of the fixed cutter 14, the movable cutter 48 is pushed down by the fixed cutter 14 and elastically deforms. In this state, the movable cutter 48 advances to the cutting position while contacting the fixed cutter 14, and cuts the paper 16. In this case, since the notch 55 is provided at the center of the cutting blade 54, the center of the sheet 16 remains without being cut even when the movable cutter 48 is moved to the cutting position. The operator is torn off the leading end of the sheet 16 in this state. After the movable cutter 48 is moved to the cutting position, the cam 88 is further rotated half a turn.
3 is retracted, and the movable cutter 48 is retracted together with the driving member 73 to return to the original position. At this time, the movable cutter 4
8 returns from the elastically deformed state to the original state as it comes off the fixed cutter 14.

When the paper 16 is thick and the load applied to the movable cutter 48 in the retreating direction is equal to or greater than the elastic deformation resistance of the elastic engagement portion 57, the movable cutter 48 comes into contact with the paper 16 and stops. On the other hand, since the cam 88 continues to rotate, the driving member 73 tries to move forward. At this time, if a load in the retreating direction is applied to the movable cutter 48 beyond the elastic deformation resistance, as shown in FIGS. The pin 82 moves while elastically deforming the claw portions 58, 59 of the elastic engagement portion 57 and expanding outward. The engagement pin 82 is connected to the neck 64 of the slot 62.
Through the taper portion 66 and the driving member 7
3 also advances relatively to the movable cutter 48. This relative movement is allowed by the engagement pin 82 being detached from the elastic engagement portion 57.

As described above, the paper 16 is thick and the movable cutter 4
When the cam 88 further rotates and returns to the initial position, the engaging pin 82 withdraws along with the retraction of the driving member 73 even when the cam 8 cannot be cut, and the fitting hole 60 is guided by the tapered portion 66.
Try to move towards. Initially, the movable cutter 48 is also retracted by being pushed by the engaging pin 82 together with the retracting of the engaging pin 82, but the stopper surface 49 of the movable cutter 48 abuts the stopper 20 and cannot be retracted. When the force exceeds the elastic deformation resistance of the elastic engaging portion 57, the claw portions 58, 5
9 is elastically deformed to allow the engaging pin 82 to retreat, and the engaging pin 82 returns to the state of being fitted into the fitting hole 60 through the neck 64. As a result, the movable cutter 48 and the driving member 73 can be moved forward together again, and the next time the paper 16 is cut, the cutting can be performed as it is. The relative movement permitting device naturally returns to the original state.

As described above, in the sheet cutting apparatus of this embodiment, when the paper 16 is thick and cannot be cut by the movable cutter 48, the movable cutter 48 stops and only the driving member 73 moves forward. Since the allowable load is not applied to the movable cutter 48, no excessive load is applied to the cutter driving device including the driving member 73 from the movable cutter 48. Damage to the cutter drive can be avoided. In addition, since the relative movement permitting device allows relative movement between the movable cutter 48 and the driving member 73 by utilizing the elastic deformation resistance of the elastic engaging portion 57, the relative movement permitting load has a small variation, and the Reliability is improved.

Further, in the sheet cutting apparatus described in Japanese Patent Application Laid-Open No. 6-210596, the relative movement allowable load must be adjusted to an appropriate value by changing the screwing amount between the screw and the nut. However, in this embodiment, since the relative movement allowable load is defined by the elastic deformation resistance of the elastic engaging portion 57, the shape, size, material, and heat treatment conditions of the elastic engaging portion are controlled. Thereby, the relative movement allowable load can be managed accurately. Therefore, there is no need to perform the operation of adjusting the relative movement allowable load, and a sheet cutting device that is easy to use can be obtained.

Further, in the above-mentioned conventional sheet cutting apparatus, a large number of parts such as screws, flat springs, slip films and sliding plates are required, whereas in the present embodiment, the number of parts is small and assembly is possible. Since the operation is simple, there is an advantage that the manufacturing cost can be reduced.

Another embodiment of the sheet cutting apparatus of the present invention will be described. In the first embodiment shown in FIGS. 1 to 7, the movable cutter 48 and the elastic engaging portion 57 are integrated, but in the present embodiment, both are separate. Therefore, it is inappropriate to form the movable cutter and the elastic engaging portion integrally, because the movable cutter has too small or too large a thickness, or the material thereof has a small spring elasticity. This is a preferred embodiment in the case. In addition,
In this embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 8 shows only the different movable cutters from the whole apparatus shown in FIG. In this figure, the movable cutter 110 has a flat plate shape and is made of a material having low spring elasticity such as ceramic. An elongated hole 112 is formed at the center thereof in the cutter moving direction, and an engaging pin (not shown) is fitted therein so as to be movable in the cutter moving direction. A through hole 114 is formed near the rear end of the movable cutter 110. A separate flat plate-like elastic engaging member 116 is provided on the lower surface of the movable cutter 110, and a through-hole 118 is provided at a position corresponding to the through-hole 114 of the movable cutter 110 at the rear end. . These through holes 114, 118
Rivet 120 is inserted through the elastic engaging member 1
The movable cutter 1 is caulked on the 16 side.
The elastic engagement member 116 and the elastic engagement member 116 are fixed, and the elastic engagement member 116 functions as an elastic engagement portion of the movable cutter 110.

The other parts of the structure of the sheet cutting apparatus according to the present embodiment and the operation of the entire apparatus are the same as those of the first embodiment, so that illustration and description are omitted. In this embodiment, since the movable cutter 110 and the elastic engaging member 116 are separate bodies, the movable cutter is made of an inexpensive material or a material that is suitable for the cutter but has poor spring elasticity. Only one can be made of a material with excellent spring elasticity. Thereby, the manufacturing cost can be further reduced or the life of the movable cutter can be extended.

In addition, in the above two embodiments, the engaging pin is provided on the driving member side, but it may be provided on the movable cutter side. For example, the movable cutter 48 is provided with an engaging pin 82 at right angles to the plate surface thereof, and the elastic engaging member 116 is fixed to the driving member 73.

In the first embodiment, the electric motor (not shown) constitutes the drive source. However, the drive source may be constituted by a solenoid, for example, and the drive force of the drive source is applied to the drive member. The transmission mechanism may be constituted by a link mechanism or the like. In addition, the relative movement permitting device itself in each of the above embodiments is a device that performs a predetermined operation by moving the movable member forward and backward, in addition to the sheet cutting device, in which a load in the retreating direction that is equal to or more than the elastic deformation resistance is applied to the movable member. In such a case, the present invention can be applied to an apparatus that needs to avoid damage to a movable member or the like in the case where the movable member is used. Although not specifically exemplified, the present invention can be implemented in various modified and improved modes based on the knowledge of those skilled in the art without departing from the scope of the claims.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a sheet cutting apparatus according to an embodiment of the present invention.

FIG. 2 is a front sectional view showing the sheet cutting device.

FIG. 3 is an enlarged bottom view showing a movable cutter in the sheet cutting device.

FIG. 4 is a front sectional view showing a state in which the sheet cutting device cuts a sheet.

FIG. 5 is a plan view showing a state where the sheet cutting device has cut a sheet.

FIG. 6 is a front sectional view showing a state where the sheet cutting device cannot cut a sheet.

FIG. 7 is a plan view showing a state where the sheet cutting device cannot cut a sheet.

FIG. 8 is an exploded perspective view showing a part of a sheet cutting apparatus according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Cover plate 12 Slot 14 Fixed cutter 16 Paper 20 Stopper 24 Base plate 26 First opening 32 First support plate 34 Second opening 38 Second support plate 40 Third opening 44, 46 Gap securing projection 48 Movable cutter 54 Cutting blade 57 Elastic engaging part 58, 59 Claw part 62 Slot 64 Neck part 73 Driving member 74 Substrate part 76, 78 Arm part 82 Engaging pin 88 Cam 110 Movable cutter 116 Elastic engaging member

Claims (5)

(57) [Claims] An apparatus main body, a movable cutter having a flat plate shape, a cutting edge formed at a leading edge thereof, and supported by the apparatus main body so as to be movable in a direction intersecting the cutting blade; A fixed cutter provided in the apparatus main body and cooperating with the movable cutter to cut the band-shaped sheet along a cutting line intersecting the longitudinal direction thereof; a drive source; and a drive source driven by the drive source and engaged with the movable cutter. A cutter driving device for moving the movable cutter to the cutting position for cutting the band-shaped sheet in cooperation with the fixed cutter and for retracting the movable cutter to the original position; and a movable cutter when the movable cutter advances. A sheet cutting device including a relative movement permitting device that permits relative movement of the movable cutter and the driving member when a load in a retreating direction equal to or more than a set value is applied to the sheet cutting device; Pairs movement permitting device, the movable mosquitoes and the drive member
One side of the movable cutter is provided at right angles to the plate surface of the movable cutter.
Mating pin, the other of the driving member and the movable cutter
A fitting hole fixedly provided and capable of fitting with the engagement pin;
A direction parallel to the moving direction of the movable cutter from the fitting hole
And a neck having a width smaller than the diameter of the engagement pin.
And an elastic engaging portion having a slot having a portion.
And the neck is movable with respect to the fitting hole.
When the load in the reverse direction of the cutter reaches the set value,
The mating pin is formed on the side that moves from the mating hole.
Sheet cutting equipment. 2. The elastic engagement portion is formed by stamping a plate material.
The sheet according to claim 1, wherein the sheet is formed.
Cutting device. 3. The slot according to claim 1, wherein said slot is opposite to said neck.
At the end, a taper that gradually decreases in width as it approaches the neck
The method according to claim 1, wherein:
Sheet cutting device. 4. The movable cutter forms the movable cutter.
A flat plate member formed integrally therewith.
The sheet according to any one of claims 1 to 3 Cutting equipment
Place. 5. The movable cutter according to claim 1, wherein
Formed on a separate plate-like member and fixed to the movable cutter
The method according to any one of claims 1 to 3, wherein
The sheet cutting device according to the above.