JPH07313397A - Paper roll device - Google Patents

Abstract

PURPOSE:To enable the cutting of rolled paper with one hand by providing a clutch mechanism in a vertically pivotable cover that covers the rolled paper, the clutch allowing the rolled paper to rotate downward and providing a resistance against reverse rotation. CONSTITUTION:When a rolled paper 50 is drawn out to cut the paper, the leading end portion of the rolled paper 50 is raised so as to raise a front end portion of a cutter 5 so that the front end portion is bent upward with respect to a cover 4. With this posture change of the cutter 5, an edge of a presser plate 5c presses the peripheral surface of the rolled paper 50 to prevent the rolled paper 50 from rotating. As the cover 4 is pivoted, rollers 9a borne on the peripheral surface of a supportive shaft 4b are moved by friction and spring force to engage with the peripheral surface in the form of wedges. That is, rotation of the shaft 4b is restricted by a clutch ring 9, so that the rolled paper 50 is cut by abutment of the paper 50 on the cutter 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper wrapper which can easily cut a roll paper with one hand.

[0002]

2. Description of the Related Art A paper winding machine for feeding a set roll paper and cutting it into an appropriate length is supported by a core rod so that the roll paper can be rotated, and the roll paper is supported on the peripheral surface of the roll paper. The basic structure is to have a paper cutting board that strikes.

In such a paper wrapping machine, the paper cutting plate moves freely up and down, so when actually cutting the roll paper, hold the roll paper with one hand and hold the paper cutting plate with the other hand. I had to hold it down.

On the other hand, for example, Japanese Patent Publication No. 63-632.
Some roll papers can be cut with only one hand, as described in JP-A-13, JP-B-62-12384 and JP-A-2-34219.

The one disclosed in Japanese Patent Publication No. 63-63213 is
A retaining plate is provided near the spindle of the paper cutting plate, and the retaining plate is restrained by a spring so that it is dropped into a step groove provided on the back side of the paper winder to restrain the roll paper at the tip of the paper cutting plate. The structure is such that the reaction force due to the cut is received by the retaining plate.

The paper wrapping machines described in Japanese Utility Model Publication No. 62-12384 and Japanese Patent Laid-Open No. 34219/1990 are basically the same as those in the above publications, and the paper cutting plate is rotated upward. It is equipped with a ratchet mechanism that regulates movement, and by controlling the warp of the paper cutting plate during cutting, it is possible to cut the roll paper with one hand.

[0007]

However, the outer diameter of the roll paper becomes smaller as the roll paper is used, so in the case where the latch plate is held by the elastic force of the spring, the roll paper is The force to hold varies. For this reason, depending on the paper quality of the roll paper, in particular, the reaction force reception by the retaining plate may not be sufficiently obtained, which makes it impossible to cut with only one hand.

In the case of using the ratchet mechanism,
Since a sufficient mechanical force can be obtained with respect to the upward rotation of the paper cutting plate, the reliability is higher than that using a spring and a latch plate.

However, since the ratchet mechanism is incorporated, the whole structure is complicated and it is easy to set the roll paper. Also, when pulling out the roll paper, the ratchet mechanism makes a clicking sound and the resistance of the ratchet mechanism is relatively large, so the movement of the paper cutting board is not smooth. Further, since the number of parts is inevitably large, it is easy to cause a failure such as being unusable due to the loss of only one part.

Further, even in the conventional structure provided with an alternative to the ratchet mechanism, the generation of sound is likely to be an obstacle.

As described above, in the conventional paper wrapping machine, an insufficient surface still remains in view of the reliable cutting of the roll paper with one hand and the structure itself.

An object to be solved in the present invention is to provide a paper winding machine having a simple structure and capable of surely cutting a roll paper by an operation with only one hand.

[0013]

SUMMARY OF THE INVENTION According to the present invention, a cover which covers an upper portion of a roll paper to be loaded and which can be turned up and down by a support shaft provided at a base end is connected to a front end of the cover. A cutter and rotation control means for restraining rotation of the support shaft in a direction in which the cover rotates upward are provided, and the rotation control means includes the rotation control means when the cover changes its posture downward. It is characterized in that it is provided with a clutch mechanism that allows rotation of the shaft in one direction and provides resistance to rotation in the opposite direction by a sliding contact method.

The clutch mechanism is formed with a clutch ring arranged around the support shaft and a portion where the clutch ring faces the outer peripheral surface of the support shaft, and the opening area of the longitudinal section is reduced in the direction in which the cover is rotated upward. And a rolling element that is housed inside the chamber and has an outer diameter larger than the depth of the opening of the smallest vertical cross section of the chamber and that can slide on the peripheral surface of the support shaft. In this case, the rolling element
It may be a spherical rolling roller.

Further, the rotation control means restrains the rotation of the clutch mechanism against the load on the support shaft which is applied when the roll paper is cut by the cutter, and by the upward external force larger than the load at the time of cutting. The clutch mechanism may be provided with a rotation restricting means that allows the clutch mechanism to rotate upward.

The rotation restricting means is formed by fitting and fixing a bush made of an elastic material, which is externally inserted on the support shaft, to the cover, and resists a frictional force between the support shaft and the bush and / or between the bush and the cover. Can be given as the above. Further, the rotation restricting means may be provided with a resistance mechanism for exerting a resistance due to elasticity or viscosity on the peripheral surface of the clutch ring, and the shoe that makes sliding contact with the peripheral surface of the clutch ring and the shoe. The clutch ring may be configured to be urged toward the peripheral surface of the clutch ring. Further, it may be composed of a sliding shoe which is arranged coaxially with the clutch ring and is in sliding contact with the end surface of the clutch ring, and an operating means which urges the sliding shoe toward the end surface of the clutch ring. Furthermore,
A pair of shoes that are arranged around the clutch ring and rotatably connect their base ends to each other, a spring that connects these shoes and urges them in the direction of sliding contact with the peripheral surface of the clutch ring, and shoes. It is also possible to provide an operating means for expanding the abutting portion of the above and releasing the sliding contact with the circumferential surface of the clutch ring.

Further, the base end of the cutter is connected to the tip of the cover so as to be swingable in the vertical direction, and a pressing member is provided which extends obliquely downward from the base end of the cutter and hits the outer peripheral surface of the roll paper. The configuration may be different. In this case, the pressing member may be a non-slip member that increases the contact friction with the outer peripheral surface of the roll paper.

Further, the cutter may have a cut surface formed by arranging at least one or more gentle ridges in the width direction.

[0019]

The rotation of the support shaft in the direction in which the cover rotates upward is restrained and restricted by the rotation control means. Therefore, when the roll paper is cut by the cutter, a force that pulls up the cover acts. However, the roll paper can be cut with the cutter without moving the cover. Since the rotation restricting means is a clutch mechanism that applies resistance to the support shaft by a sliding contact method, no sound is emitted when the support shaft rotates when the roll paper is pulled out or cut.

When the clutch mechanism is provided with the clutch ring and the rolling elements housed in the chamber thereof, the rotation of the support shaft can be regulated by a simple structure in which the vertical cross-sectional shape of the chamber is unique. If a spherical rolling roller is used as the rolling element, the contact resistance when the support shaft turns becomes extremely small, and a light operation is ensured.

When the rotation restricting means is provided, the support shaft is rotated by strongly pushing the cover upward, so that the core rod can be detached or provided with a hook for rotating up and down. It is set and removed by inserting and removing the paper up and down.

Also, the rotation can be restricted by a resistance mechanism that exerts a resistance due to elasticity or viscosity on the peripheral surface of the clutch ring, and a simple structure using, for example, an O-ring can be substituted. In addition, a shoe that can be operated from the outside can be brought into sliding contact with the peripheral surface of the clutch ring, a sliding shoe can be brought into contact with the end surface of the clutch ring, or a pair of shoes can be slidably contacted around the clutch ring to achieve the same effect. Rotation can be restricted.

When the cutter is attached to the cover so as to swing up and down, and a pressing member for pressing the peripheral surface of the roll paper is provided on the lower surface of the cutter, the cutter is rotated upward when the roll paper is cut. The pressing member presses the roll paper, and resistance is added to the feeding. For this reason, when the roll paper is cut, its feeding is also regulated, and stable cutting can be performed without shifting the cutting line by the cutter. Further, if the pressing member is provided with non-slip, the slip of the roll paper is also regulated, and more stable cutting can be performed.

Furthermore, if the cutting surface of the cutter has a gentle ridge, not only will the touch on the fingertip be softer, but it will be easier to get caught in the ridge when pulling the roll paper with one hand, so that the cutter can be easily cut. can do.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a partially cutaway front view showing an embodiment of a paper winding device of the present invention, FIG. 2 is a partially cutaway plan view thereof, and FIG. 3 is a vertical sectional view taken along the line AA of FIG. Is.

In the figure, side plates 2 protruding forward are provided at both left and right ends of a mounting substrate 1 fixed to a wall by screws 1a.
Hook 2 which connects 3 and is fitted in hollow core 51 of roll paper 50 inside each of these side plates 2 and 3.
a and 3a are provided.

The hooks 2a and 3a are roll paper 50.
By inserting the hooks 2a, 3a into the side plates 2, 3 from below,
This is a conventionally known one-touch type in which the hollow core 51 can be pulled out when pulled up. Due to such an operation, as shown in FIG. 1, the base end of the hook 3a is connected to the elastic restoring mechanism 3b housed in the side plate 3, and the hook 2a arranged on the left side is also attached to the side plate 2 by the similar elastic restoring mechanism 2b. It is connected.

Between the side plates 2 and 3, a cover 4 and a cutter 5 connected to the tip of the cover 4 are integrally attached so as to be vertically rotatable.

The cover 4 has a base end portion having a circular opening cross section and fixed to the left and right support shafts 4a and 4b. By inserting the support shafts 4a and 4b into the side plates 2 and 3, respectively, an axis line is formed. Connected rotatably around.

The tip of the cutter 5 is shown in FIGS.
As shown in FIG. 4, the cut surface 5a has a gentle corrugated shape and is connected to the cover 4 by the hinge structure shown in FIG.

In FIG. 4, two sets of two hinge ribs 4c and 4d are provided on the lower surface of the cover 4 on the front end side.
These hinge ribs 4 are provided on the base end side of the lower surface of the cutter 5.
A connecting seat 5b sandwiched between c and 4d is provided. Then, by inserting the pin 6 into the holes 4c-1, 4d-1, 5b-1 of the hinge ribs 4c, 4d and the connecting seat 5b, respectively, the cutter 5 is connected to the cover 4 so as to be freely bent. To do.

Further, the connecting seat 5b of the cutter 5 is integrally provided with a pressing plate 5c which is in a posture of diving under the cover 4 as a pressing member. When the pressing plate 5c has the maximum outer diameter of the roll paper 50, the pressing plate 5c has a substantially horizontal posture as shown in FIG.
The shape is arranged so as to abut the outer peripheral surface of the.

In order to increase the degree of contact with the peripheral surface of the roll paper 50, a non-slip 5d for preventing slippage is provided on the surface of the pressing plate 5c. This non-slip 5
The d may be, for example, the surface of the pressing plate 5c having a minute uneven shape, or the one having a large friction coefficient such as rubber attached.

The support shaft 4b on the right side of the base end of the cover 4 restricts the upward rotation of the cover 4 and the cutter 5 against the force applied when the roll paper 50 is cut, and is larger than that at the time of cutting. When a force is applied, it is connected to the rotation control unit 7 for rotating upwards accordingly.
The rotation control unit 7 is located at the upper end inside the side plate 3 and is an enlarged front vertical cross-sectional view of a structure for connecting with the support shaft 4b in FIG. 5 and a vertical cross-sectional view taken along the line BB of FIG. Are shown in FIG. 6, respectively.

The rotation control unit 7 includes a rotation restriction housing 8 and a clutch ring 9 which is coaxially rotatable with the rotation restriction housing 8.
It is equipped with and.

The rotation restricting housing 8 is fixed to the inside of the side plate 3 and has a resistance ring 8a such as an O-ring which is in close contact with the outer peripheral surface of the clutch ring 9 and gives a sliding resistance thereto. . The magnitude of the sliding resistance by the resistance ring 8a is set to be larger than the expected maximum value of the upward reaction force when the roll paper 50 is cut by the cutter 5. By setting the sliding resistance in this way, when the cutter 5 cuts the roll paper 50, even if the clutch ring 9 tries to rotate, it can be held in a stopped state by restraining it.

As the resistance means incorporated in the rotation restricting housing 8, a viscous fluid, a spring or the like can be used in addition to the resistance ring 8a using an O-ring. For example,
In the case of viscous fluid, a groove may be cut in the inner circumference of the rotation restricting housing 8 and a viscous agent such as grease may be enclosed therein. In the case of a spring, a plurality of plates may be formed on the inner circumference of the rotation restricting housing 8. It is possible to arrange the springs so that a sliding resistance can be applied to the peripheral surface of the sliding ring 9 by the elastic reaction force thereof.

As described above, the clutch ring 9 remains stationary inside the rotation restricting housing 8 within the range of the reaction force when the roll paper 50 is cut, and the clutch ring 9 rotates by itself when the reaction force becomes large. It moves to change the postures of the cover 4 and the cutter 5 upward. Then, with respect to the support shaft 4b inserted therein, the cover 4 and the cutter 5 are freely rotatable in a direction in which the cover 4 and the cutter 5 are tilted toward the peripheral surface side of the roll paper 50, but are prevented from rotating in the opposite direction. to bound.

In order to rotate and restrain the support shaft 4b, the clutch ring 9 has a proper number of rolling rollers 9a. As shown in FIG. 6, these rolling rollers 9a are housed in a chamber 9b in which the inner peripheral side of the clutch ring 9 and the outer peripheral surface side of the support shaft 4b are opened.

The chamber 9b includes a cover 4 and a cutter 5.
Is provided with a taper restraining surface 9c having a gentle curved surface for increasing the degree of opening in the direction of turning downward (in the direction of the arrow of the support shaft 4b in the figure). When the tapered constraining surface 9c hits a portion having a small opening degree, the rolling roller 9a is strongly sandwiched between the rolling surface 9a and the peripheral surface of the support shaft 4b, thereby preventing the rotation of the support shaft 4b. Further, a spring 9d for urging the rolling roller 9a in the converging direction of the taper restraining surface 9c is incorporated in the chamber 9b, and the rolling roller 9a is always pressed against the converging side of the taper restraining surface 9c.

In the above configuration, as shown in FIG.
When the roll paper 50 is set on the hooks 2a and 3a and the cover 4 and the cutter 5 integrated therewith are covered, the pressing plate 5c of the cutter 5 is placed on the outer peripheral surface of the roll paper 50 and abuts against it.

Here, when the roll paper 50 is fed out and cut, the feed side of the roll paper 50 is pulled up as shown by the alternate long and short dash line in FIG. As a result, the tip of the cutter 5 is pulled up and bent upward with respect to the cover 4.
Due to such a change in the posture of the cutter 5, the tip end side of the pressing plate 5c provided on the base end side changes its posture in a direction in which it bites into the peripheral surface of the roll paper 50 and presses it. Therefore, the roll paper 50 has the hooks 2a, 3
It is restrained so that it cannot rotate around a.

On the other hand, the rotation of the cover 4 causes the support shaft 4b to move.
Rotates in the direction opposite to the arrow shown in FIG. Therefore, the rolling roller 9a that abuts the peripheral surface of the support shaft 4b.
Is gradually moved to the left by friction and the biasing force of the spring 9d, and wedge-engages between the surface where the taper restraining surface 9c converges and the outer peripheral surface of the support shaft 4b. Therefore, the rotation of the support shaft 4b is restricted by the clutch ring 9.

The spring 9d is not always necessary, and the spring 9d may be omitted. this is,
Due to the opening cross-sectional shape of the chamber 9b as shown in FIG. 6, the rolling roller 9a can perform the above-mentioned operation only by the frictional force with the peripheral surface of the support shaft 4b without the biasing force of the spring 9d. Because it is.

By pulling up the roll paper 50 in this manner, the hooks 2a, 3a of the roll paper 50 are
The surrounding rotation is blocked and the cover 4 and the cutter 5 are also fixed in a fixed state. Therefore, roll paper 5
When the feeding end side of 0 is further pulled up, the tension of the portion where the roll paper 50 is in contact with the cut surface 5a of the cutter 5 exceeds the limit and breaks.

As described above, after the roll paper 50 is fed out, it is sufficient to move the roll paper 50 along the cut surface 5a while pulling it up, and it can be easily cut with one hand.

Further, the support shaft 4b is in the direction of the arrow shown in FIG.
That is, when the cover 4 and the cutter 5 move in the downward posture, the rolling roller 9a in contact with the support shaft 4b also moves to the right in the figure by adjusting the sliding resistance and the spring constant of the spring 9d appropriately. To do. This movement direction is
Since the taper restraining surface 9c extends in a fan shape, the support shaft 4 via the rolling roller 9a by the taper restraining surface 9c is formed.
The pressure on the peripheral surface of b is released, and the support shaft 4b can freely rotate.

As described above, the support shaft 4b can rotate integrally with the cover 4 and the cutter 5 in the downward direction, and the rotation is restricted only when the support shaft 4b is pulled up.

From the above, even if the outer diameter of the roll paper 50 is reduced, the cover 4 and the cutter 5 gradually change their postures in a slanting downward direction following the roll paper 50. Therefore, the pressing plate 5c can be kept in contact with the peripheral surface of the roll paper 50 in the same condition as the initial condition of FIG. 3, and the one-handed cutting can be performed by pulling up the feeding portion.

Here, when setting a new roll paper 50 on the hooks 2a, 3a, these hooks 2
a and 3a incline upward toward the side plates 2 and 3 and retreat, and after that, the respective tip portions enter into the hollow core 51 by the elastic reaction force. Therefore, when setting the roll paper 50, it is necessary to raise it to a position higher than the level shown in FIG. Also, after using it, the hollow core 51
When the cover 4 and the cutter 5 are covered with the hollow core 51, the cover 5 and the cutter 5 are pulled out and removed.

In order to set the roll paper 50 and recover the hollow core 51, the cover 4 and the cutter 5 are used.
Upward rotation is required. On the other hand, when the roll paper 50 is cut by the cutter 5, it overcomes its reaction force and is held at a fixed position, and when it exceeds this reaction force, it is rotated so that the cover 4 and the cutter 5 move in this manner. It is possible. The setting of the sliding resistance on the clutch ring 9 by the rotation restricting housing 8 enables such an operation.

When the cover 4 and the cutter 5 are pulled up, the support shaft 4b behaves as a rotating body integrated with the clutch ring 9 by the rolling roller 9a and the taper restraining surface 9c, as described with reference to FIG. Therefore, the resistance by the resistance ring 8a is set so as to allow the clutch ring 9 to rotate only when the support shaft 4b rotates and has a value larger than the reaction force when the roll paper 50 is cut. Then, the clutch ring 9 can be rotated in the rotation restricting housing 8.

With such a connecting structure between the rotation restricting housing 8 and the clutch ring 9, it becomes possible to pull up the integrated body of the cover 4 and the cutter 5 as necessary, and a new roll paper 50 is set. Also, the hollow core 51 after use can be removed.

Here, in FIG. 5, instead of the rotation restricting housing 8 and the resistance ring 8a, a bush 4f made of an elastic material is firmly fitted between the outer periphery of the support shaft 4b and the fitted portion of the cover 4. Alternatively, the rotation can be restricted by applying a resistance between the support shaft 4b and the cover 4. In this case, the fitting degree between the bush 4f and the support shaft 4b or the fitting degree between the bush 4f and the cover 4 is made appropriate, and the load on the cover 4 side when the roll paper 50 is cut is on the cover 4 side. The magnitude of the frictional force between the bush 4f, the support shaft 4b, and the cover 4 is set so that the upward rotation is restricted and the cover 4 can be opened and closed vertically with respect to an external force larger than this. do it. Such frictional force can be set only between the bush 4f and the support shaft 4b or only between the bush 4f and the cover 4, or a combination of the two can be used.

7A and 7B show another structural example of the rotation restricting means. FIG. 7A is a vertical sectional view of a main part, and FIG. 7B is a plan view of FIG. . Note that FIG. 7A corresponds to a vertical cross section taken along the line CC in FIG.

In place of the rotation restricting housing 8 mounted around the clutch ring 9 described with reference to FIGS. 5 and 6, a shoe 10 which enables a resistance load and its release by a manual operation.
Also, an operating rod 11 for operating this is provided inside the side plate 3. The shoe 10 and the operating rod 11 are swingably connected to the side plate 3 by a pin 3c, and the inner circumference of the shoe 10 has a shape that fits the outer circumference of the clutch ring 9. The operating rod 11 is connected to the shoe 10 by a pulling spring 11a, and the upper end of the operating rod 11 is incorporated as an arrangement projecting upward from an operating hole 3d formed in the top plate portion of the side plate 3. Further, the operation hole 3d is a lock portion 3e which is cut long in the front-rear direction of the side plate 3 and has a slightly wider front end side.

In the state of FIG. 7 (a), the shoe 10 is separated from the periphery of the clutch ring 9 and the clutch ring 9 can freely rotate. Therefore, the support shaft 4b rotates integrally with the clutch ring 9, and the roll paper 50 can be exchanged.

Further, the operating rod 11 is moved in the direction of the arrow in the figure to restrain it in the lock portion 3e. As a result, the shoe 10 is pulled forward by the spring 11a and its inner peripheral surface abuts on the outer peripheral surface of the clutch ring 9. Therefore, for the clutch ring 9, the shoe 10
Provides a sliding resistance, so that the roll paper 50 can be cut by the cutter 5 with one hand as in the case of using the rotation restricting housing 8 of the previous example.

FIG. 8 is a vertical cross-sectional view of a main part showing still another structural example of the rotation restricting means.

The same clutch ring 9 as shown in FIGS. 5 and 6 is attached to the support shaft 4b, and a sliding shoe 12 is moved left and right in the figure by a guide (not shown) coaxially with the support shaft 4b. It is possible to be installed inside the side plate 3.

On the other hand, the side plate 3 is provided with a well-known shift mechanism 13 used for feeding and returning the lead of a ballpoint pen, for example, coaxially with the support shaft 4b. This shift mechanism 13
Is provided with an operation button 13a protruding to the outside of the side plate 3 at one end side, and a shifter 13b facing the sliding shoe 12 is connected to the other end, and between the shifter 13b and the sliding shoe 12. A spring 13c is interposed in the.

When the button 13a is pushed once, the shift mechanism 13 moves the shifter 13b to the left side in the figure with a certain stroke and holds it in a stopped state. When the button 13a is pushed again, the shifter 13b is retracted to the original position. The movement of returning to the position of is repeated.

In this example, when the roll paper 50 is replaced, the sliding shoe 12 is separated from the clutch ring 9 as shown. Accordingly, sliding resistance does not act on the clutch ring 9, the cover 4 can be opened upward by the rotation of the support shaft 4b, and the roll paper 50 can be replaced.

After the roll paper 50 is set, the button 13a is pushed and the slide shoe 12 presses the end face of the slide ring 9. With this, similarly to the example of FIG. 7, the rotation of the sliding ring 9 itself is restricted, and the roll paper 50 by the cutter 5 can be cut with one hand.

FIG. 9 is a cross-sectional view of a main part showing still another rotation restricting means, and like the example of FIG. 7, corresponds to a vertical cross section taken along the line CC in FIG.

Around the clutch ring 9, a pair of shoes 1
4a and 14b are connected so as to be rotatable with respect to each other, and a tension spring 14c is provided between them. The spring 14c acts to firmly press the shoes 14a and 14b against the peripheral surface of the clutch ring 9, and
Prevent the rotation of.

An operation button 15 is provided on the upper end of the side plate 3. The operation button 15 includes shoes 14a and 14b.
Is provided at a position corresponding to the seam portion, has a tapered portion 15a that can be inserted into the seam portion, and is biased upward by a spring 15b.

In such a structure, the lower end of the operation button 15 normally has the shoe 14a, as shown in FIG.
These shoes 1 should not interfere with 14b.
By restraining the clutch ring 9 with 4a and 14b, the roll paper 50 can be cut with one hand. And
When the operation button 15 is pushed downward as shown in FIG. 8B, the tapered portion 15a enters between the shoes 14a and 14b and pushes open the gap between them. Therefore, as shown in the drawing, the shoes 14a and 14b are slightly separated from the peripheral surface of the clutch ring 9 to allow the clutch ring 9 to rotate. Therefore, when the roll paper 50 is replaced, the roll paper 50 can be attached and detached with the other hand while pressing the operation button 15 with one hand.

Further, in the example of FIG. 9, the spring 15
Instead of the operation button 15 urged by b, a push type mechanism widely used in, for example, a knock type ballpoint pen or the like may be used. In the case of this push type, when the operation button 15 is pressed once, it is locked in the state shown in FIG. 9B, and when it is pressed again, it returns to the state shown in FIG. It is possible to operate.
Therefore, when replacing the roll paper 50,
It can be handled with one hand as in the example of FIGS. 7 and 8.

[0070]

According to the present invention, the roll paper can be easily cut by simply feeding it out with one hand and then pulling it up. Further, compared to the conventional ratchet mechanism and other complicated mechanisms, the operability is good and no noise is generated, the usability is improved and the maintenance and inspection are simplified.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of a paper wrapper according to the present invention.

2 is a partially cutaway plan view of the paper wrapper of FIG. 1. FIG.

FIG. 3 is a vertical sectional view taken along the line AA of FIG.

FIG. 4 is a view in which a cover and a cutter are face down, and an exploded perspective view showing a connecting structure between them and a pressing plate.

FIG. 5 is a front vertical cross-sectional view showing a main part of a rotation control unit.

6 is a vertical cross-sectional view of a main part showing a connecting structure between a support shaft and a clutch ring, which is taken along the line BB of FIG.

7A and 7B are another structural example of the rotation restricting means, wherein FIG. 7A is a vertical cross-sectional view of the main part thereof, and FIG. 7B is a plan view of FIG. 7A.

FIG. 8 is a vertical cross-sectional view of a main part showing still another structural example of the rotation restricting means.

FIG. 9 is a sectional view of an essential part showing an example of a structure in which an operation button type is used as a rotation restricting means.

[Explanation of symbols]

 1 Mounting Substrate 2 Side Plate 2a Hook 2b Elastic Restoration Mechanism 3 Side Plate 3a Hook 3b Elastic Restoration Mechanism 4 Covers 4a, 4b Spindle 5 Cutter 5a Cut Surface 5c Holding Plate 5d Non-slip 6 Pin 7 Rotation Control Unit (Rotation Control Means) 8 Rotation restriction housing 8a Resistance ring 9 Clutch ring 9a Rolling roller 9b Chamber 9c Tapered restraining surface 9d Spring 10 Shoe 11 Operating rod 11a Spring 12 Sliding shoe 13 Shift mechanism 13a Button 13b Shifter 13c Spring 14a, 14b Shoe 14c Spring 15 Operation Button 50 Roll paper 51 Hollow core

Claims (12)

[Claims] 1. A cover which covers an upper portion of a roll paper to be loaded and which can be rotated up and down by a support shaft provided at a base end thereof, a cutter connected to the cover, and the cover rotating upward. Rotation control means for restraining rotation of the support shaft in a direction, wherein the rotation control means allows rotation of the support shaft in one direction when the cover changes its posture downward, A paper wrapping machine provided with a clutch mechanism that provides resistance to a reverse rotation by a sliding contact method. 2. The clutch mechanism includes a clutch ring arranged around the support shaft, a clutch ring formed in a portion of the clutch ring facing the outer peripheral surface of the support shaft, and the cover ring being turned upward. A chamber with a reduced vertical cross-sectional opening area,
2. The paper winding machine according to claim 1, further comprising a rolling element that is housed inside the chamber and has an outer diameter larger than a depth of a minimum vertical cross-section opening portion of the chamber and is slidably contactable with a peripheral surface of the support shaft. 3. The paper wrapper according to claim 2, wherein the rolling element is a spherical rolling roller. 4. The rotation control means restrains the rotation of the clutch mechanism against a load applied to the support shaft when the roll paper is cut by the cutter, and moves upward in a direction larger than the load. 2. The paper wrapper according to claim 1, further comprising rotation restricting means for allowing the clutch mechanism to rotate upward by an external force. 5. The paper wrapper according to claim 4, wherein the rotation restricting means includes a resistance mechanism that causes a resistance due to elasticity or viscosity to act on the peripheral surface of the clutch ring. 6. The rotation restricting means is formed by fitting and fixing a bush made of an elastic material, which is externally inserted on the support shaft, to the cover, and between the support shaft and the bush and / or the bush and the cover. 5. The paper wrapper according to claim 4, wherein a frictional force between them can be applied as resistance. 7. The rotation restricting means comprises a shoe that slidably contacts the peripheral surface of the clutch ring, and an operating means that urges the shoe toward the peripheral surface of the clutch ring. 4. The paper wrapper according to 4. 8. The rotation restricting means is arranged coaxially with the clutch ring, and is attached to the end face of the clutch ring in sliding contact with the sliding shoe, and the sliding shoe is attached to the end face of the clutch ring. The paper wrapper according to claim 4, further comprising an operating means for urging. 9. The rotation restricting means includes a pair of shoes arranged around the clutch ring and rotatably connected to each other at their base ends, and a pair of shoes connected between the shoes to surround the clutch ring. 5. The paper winding machine according to claim 4, further comprising: a spring that biases the surface in a sliding contact direction; and an operating unit that expands the abutting portions of the shoes to release the sliding contact with the circumferential surface of the clutch ring. . 10. A press for connecting the base end of the cutter to the cover so as to be swingable in the vertical direction and extending obliquely downward from the base end of the cutter to the outer peripheral surface of the roll paper. The paper wrapper according to claim 1, further comprising a member. 11. The paper wrapper according to claim 10, wherein the pressing member forms a non-slip that increases contact friction with the outer peripheral surface of the roll paper. 12. The paper wrapper according to claim 1, wherein the cutter has a cut surface formed by arranging at least one or more gentle ridges in the width direction.