JP3426679B2 - Simple paper measurement counter - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple paper length measuring counter used for measuring the length of a paper or the like in a copying machine, a facsimile or the like, or for reading a distance of a map or the like.

[0002]

2. Description of the Related Art Conventionally, methods for measuring lengths and distances on paper, maps, etc. can be roughly classified into a method of measuring by electric means and a method of measuring by mechanical means. In this case, examples of the former measuring method by electric means include, for example, JP-A-49-9252 and JP-A-53-562.
There is one disclosed and filed by the present applicant in Japanese Patent Laid-Open Publication No. 7. In general, these are methods for measuring the paper length, and the computer processing is performed by reading the dimension corresponding to the outer peripheral length of the roller by the rotational speed of the driving roller, the pulse number with the encoder pulse of the motor or the encoder set on the roller shaft. Then, the calculated distance is electrically displayed to measure the moved length of the sheet. On the other hand, as the latter measuring method using mechanical means, for example, there is one disclosed in Japanese Patent Laid-Open No. 2-93549. In general, the paper is brought into contact with the foil, and the rotational force of the foil is transmitted by a plurality of gears to be converted. For each digit (each gear), one rotation of the lower digit causes the upper digit to rotate 1/10 ( In the case of the decimal system), the moving distance of the paper is obtained by reading the scale corresponding to each digit.

Therefore, as a specific example, an example of a foil length counter using mechanical means will now be described with reference to FIGS. 4 and 5. First, as shown in FIG. 4, a roll paper 1 as a paper is wound around a core rod 2 provided at the center of the roll paper 1 so that it can be freely rotated.
A foil 3 for counting the moving length is in contact with the roll-shaped portion of the roll paper 1 under pressure, and rotates as the roll paper 1 moves (rotates).
A gear 4 is attached to the wheel 3, and the gear 4 meshes with the gear 5. A gear 6 is mounted coaxially with the gear 5. These gears 5 and 6 can freely rotate on the same axis. A gear 7 is meshed with the gear 6, and the gear 7 is connected to a counter number wheel 8 corresponding to the lowest digit.
On the upper digit side of this last digit counter number wheel 8,
The counter number wheels 9, 10 and 11 are connected in order from the lower digit. A gear (not shown) having only one tooth is provided on the circumference of the left side (in FIG. 4) of each counter number wheel 8 to 11, and each lower girder makes one turn so that its upper girder makes 1/10. It is designed to rotate and move, and such counting is performed up to the most significant digit. In this case, the number of teeth is a combination of gear 4> gear 5 and gear 6> gear 7, whereby the gear 7 is significantly accelerated with respect to the gear 4 (acceleration type counter). ).
FIG. 5 shows a state in which the counter number wheels 8 to 11, the wheel 3 and the gears 4 to 7 are covered with a counter cover 12. A four-digit numerical value is displayed on the surface of the cover, and a reset button 13 is provided. The numerical value displayed by the reset is, for example, "123".
It changes from "4" to "0000".

[0004]

In the foil length counter using the mechanical means as described above, it is considered that the driving torque is obtained from the paper (roll paper 1) by increasing the outer diameter of the foil. Generally, by increasing the wheel outer diameter of the foil 3 to 100 to 150 mm, the counter section (counter number wheel 8 to 1) is increased.
The rotation torque of 1) is obtained. Now, assuming that the lowest digit (counter number wheel 8) of such a counter unit is set to the unit of 1 mm, it becomes 10 mm per rotation, and if this is directly connected to the wheel 3, the wheel outer diameter of the wheel 3 Has a very small diameter of 3.08 mm. If such a small-diameter wheel 3 is used, a sufficient driving force cannot be obtained from the paper, so that each wheel of the counter cannot rotate and counting cannot be performed.

Therefore, if the wheel outer diameter of the wheel 3 is increased in order to obtain a sufficient driving torque from the paper, the wheel 3 is rotated for several minutes in order to make one rotation of the uppermost digit (counter number wheel 11) of the counter section. 1 or several tens of minutes of one rotation, and each wheel of the counter section is in a state of being accelerated (acceleration type counter) rather than the wheel 3, so that the driving force is received from the paper. The wheel 3 that rotates in a rotating state becomes a state in which a larger load is applied, and the rotating torque becomes large. In particular, in a mechanical acceleration / deceleration device using a gear or the like, there is a large amount of torque loss due to the bearing and gear fitting, and the torque bounces back to the rotational torque as a load. In general,
In order to lightly rotate the wheel 3 under the same conditions, if the object connected to the wheel 3 is not a deceleration type, the wheel 3
However, the load is further increased in the speed-up type device as described above. As an example, when the wheel outer diameter of the foil 3 is set to a small diameter of about 31.8 mm, the outer circumference thereof is about 100 mm. At this time,
If one rotation of the wheel of the counter is set to 10 mm,
It becomes 100: 10 = 10: 1, which means that the wheel of the counter unit is set to speed up 10 times more than the wheel 3, and the load increases. Also, in this case, the gears must be set in two or more stages, increasing the number of parts such as gears,
A complicated mechanism results in high cost.

Further, in the case of measuring the length of a sheet by electric means, the above-mentioned problems due to mechanical means can be eliminated, but an arithmetic circuit for performing arithmetic processing such as addition and subtraction and A CPU, a power supply circuit, and the like are required, and are restricted by a place to use the device and cost. Moreover, the measuring device including such a complicated electric circuit is unsuitable for a simple measuring device that does not require very precise measurement accuracy.

[0007]

According to a first aspect of the present invention, in a simple paper length measuring counter for measuring a feeding length of a moving paper such as a roll paper, a female screw is formed on an inner peripheral surface and an outer peripheral surface is formed. A foil is provided that rotates in direct contact with the sheet, and a slide non-rotating shaft that forms a male screw that meshes with the female screw and that moves in a non-rotating state in a direction perpendicular to the foil surface is provided. Dimension scales for measuring the feeding length of the sheet are formed on the slide area corresponding to the moving direction and the outer peripheral surface of the foil.

According to a second aspect of the present invention, in the first aspect of the present invention, the slide non-rotating shaft is formed in a slide mechanism that can be moved to a position of a length measurement reference point and an arbitrary dimensional scale regardless of rotation. did.

According to a third aspect of the present invention, in the first aspect of the present invention, the female screw of the foil is formed in a projection shape, and the protruding female screw is retracted to a position higher than the height of the male thread. It was shaped like a leaf spring so that it could move.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the female thread of the foil is formed on only one ridge, and the female thread having only one ridge is provided at a single or a plurality of locations on the circumferential surface.

According to the invention of claim 5, claim 1 or 2 is provided.
In the invention described above, the position for resetting the set value is set to a position of an arbitrary dimensional scale formed on the slide region of the non-slide shaft and the outer peripheral surface of the foil.

[0012]

According to the first aspect of the invention, the female screw of the wheel and the male screw of the non-rotating shaft for sliding are engaged with each other, so that the non-rotating shaft is moved by one scale for one rotation of the wheel. It is possible to realize such a so-called deceleration type length measuring counter, and to reduce the load of the foil to a very small extent, and also to reduce the contact pressure between the paper and the outer peripheral surface of the foil.

According to the second aspect of the present invention, by simply pushing back the head of the thrust non-rotating shaft, it is possible to immediately return to the original length measurement reference point, so that the operability of the work can be improved.

According to the third aspect of the present invention, when the head of the thrust non-rotating shaft is pushed back, the projection of the female screw formed like a leaf spring is temporarily retracted to a position higher than the height of the male screw. However, since it is possible to immediately move back to the original measurement reference point by moving in the order of peaks, valleys, and mountains, it is possible to further improve the operability of the work.

According to the fourth aspect of the present invention, the one thread of the female thread and the male thread are brought into contact with each other, whereby the wheel load and the contact pressure between the paper and the outer peripheral surface of the foil are further reduced. It becomes possible.

According to the fifth aspect of the invention, instead of setting the length measurement reference point and measuring the length, the length measurement is started from an arbitrary size scale, or the addition is started from a position of a certain size scale. It becomes possible.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. The description of the same parts as those in the conventional example (see FIGS. 4 and 5) is omitted, and the same reference numerals are used for the same parts. The present embodiment relates to a simple paper length measuring counter that simply measures the length of a paper by mechanical means. That is, as shown in FIG. 1, the roll paper 1 as a paper has a shaft 14 that does not rotate at the center thereof. However, the roll paper 1 can be freely rotated. The roll-shaped portion of the roll paper 1 has an outer peripheral surface 15a of the foil 15 for counting the moving length.
Are in contact with each other under pressure, and the foil 15 rotates as the roll paper 1 moves (rotates). As shown in FIG. 2, the wheel 15 is supported by the bracket 19 at points a and b, and is freely rotatable. A male screw 16 is provided near the center of the wheel 15, and the male screw 16 is provided on the inner peripheral surface 15 b of the wheel 15.
A female screw 17 that meshes with is provided. Here, the relationship between the male screw 16 and the female screw 17 will be described. Female screw 17
Is formed in a protrusion shape and is provided at one place on the circumference with only one mountain (may be provided at a plurality of places). The female screw 17 whose tip is formed in the shape of a single mountain is formed in the shape of a leaf spring with the point P as the pivot. As a result, the female screw 17 has a height at which the male screw 16 is caught (the female screw 1
7 and the male screw 16 can be retracted and moved to a position higher than the height of the portion where the male screw 16 is engaged. On the other hand, male screw 16
As shown in FIG. 3 (a), has a cut groove 18 at one end, and this cut groove 18 is formed so as to sandwich a slide piece 19a serving as a slide region of the bracket 19. Therefore, the male screw 16 having such a cut groove 18 constitutes a slide non-rotating shaft 20 (slide mechanism) which moves in the direction X at right angles to the wheel surface while being prevented from rotating. In the normal case, the male thread 16 simply means a thread formed on a round bar, but in the present embodiment, the male thread 16 is intentionally used in distinction from the slide non-rotating shaft 20.

A bracket 21 is fixed to the shaft 14 by a knob screw 26 (or a spring force of the bracket 21). Arm 27 of bracket 21
The arm 28 of the bracket 19 and the arm 28 of the bracket 19 are rotatable by fitting a rotation shaft 29 (for example, a pin) into a hole (not shown) provided in each other. Further, the spring 22 is stopped between the spring hooks 27a and 28a provided on the arms 27 and 28, respectively, whereby the outer peripheral surface 15a of the foil 15 is attached to the surface of the roll paper 1 about the rotation shaft 29. Is to be pressurized. In this case, the pressing force can be adjusted by the strength of the spring 22. In addition, on the outer peripheral surface 15c that is one step lower than the foil 15, a scale (scale) 23
Is engraved. On the other hand, the slide piece 1 of the bracket 19
A scale 24 is engraved on 9a. A mark 25 for reading the scale 23 is engraved at a position of the bracket 19 in contact with the outer peripheral surface 15c of the wheel 15. The material of the outer peripheral surface 15a of the foil 15 is preferably a material having a high friction coefficient that is unlikely to slip because it comes into contact with the roll paper 1, and has a high outer diameter accuracy and a small change with environmental conditions. Is good. Specifically, stainless steel, alumina, or the like fused or blasted, or rubber or the like is used as the outer peripheral surface 15a.

In such a structure, the foil 15 rotates as the roll paper 1 moves. This foil 15 is 1
The male screw 1 that meshes with the female screw 17 by rotating
6 moves by the pitch. By moving the male screw 16, that is, the thrust non-rotating shaft 20 to the left (in FIG. 2), the position of the kerf 18 at one end of the thrust non-rotating shaft 20 moves one scale from 0 to the left on the scale 24. To do. Here, a specific example will be described. Now, if it is assumed that 100 mm is detected in one revolution (one rotation) of the foil 15, the outer diameter of the foil is approximately 31.83 mm, and the circumference is 10
One graduation divided into 0 equals 1 mm. In this case, foil 1
One round of 5, that is, 100 mm corresponds to one rotation of one ridge of the female screw 17, and one rotation of the female screw 17 corresponds to the pitch of the male screw 16. Therefore, one scale of the scale 24 on the slide piece 19a is 100 mm. 1m on the scale
(1M position) is shown. Therefore, by moving the male screw 16, that is, the thrust non-rotating shaft 20 to the left by the pitch, the tip portion of the kerf 18 on the scale 24 moves one scale to the left from the 0 (measurement reference point) position. Therefore, it can be seen that the roll paper 1 is rotated by 100 mm, that is, 10 cm.

As mentioned above, the female thread 17 of the foil 15 is
Of the thrust non-rotating shaft 20 and the male screw 16 of the thrust non-rotating shaft 20 are in contact with each other, so that the thrust non-rotating shaft 20 is moved by one graduation for one rotation of the wheel 15. Can be realized,
The wheel load of the foil 15 can be made very small, and the contact pressure between the roll paper 1 and the outer peripheral surface 15a of the foil 15 can be made small. Therefore, from such a point, stable and highly reliable length measurement can be performed as a simplified mechanically simple structure. In addition, the protrusion having only one mountain formed on the female screw 17 can be formed not only in one mountain but also in several mountains, and it is not necessary to limit the number of protrusions to one on the circumference. It may be provided.

When the head of the thrust non-rotating shaft 20 (the tip of the cut groove 18) is strongly pushed back in the right direction (thrust direction X), the tip of the cut groove 18 is moved from an arbitrary scale position on the scale 24. Move to the 0 position of the length measurement reference point. At the time of this pushing back, since the female screw 17 is formed in a leaf spring shape so as to be able to retract and move to a position higher than the height of the male screw 16 being caught, the protrusion of the female screw 17 temporarily escapes and , Trough, mountain, trough, and so on. Therefore, from such a point, it is possible to immediately return to the original length measurement reference point by simply pushing back the head of the thrust non-rotating shaft 20, so that operability is increased.
Work efficiency can be further improved.

Further, when measuring a length that is equal to or longer than the capability of the main measurement counter (that is, equal to or larger than the scale value), set once by returning to the length measurement reference point (0 value) during the length measurement. By reading again after adding again, it is possible to measure without any problem even if the capacity is exceeded. Further, since the main measurement counter can set the position of resetting the set value to the position of any dimensional scale of the outer peripheral surface 15c of the wheel 15 and the scale 24 of the bracket 19, the addition is started from a certain dimensional scale position. Alternatively, the measurement can be started from an arbitrary scale on the scale instead of starting the measurement by setting the measurement reference point and by doing so, the range of use can be further expanded. The main length measurement counter can measure not only the length of the paper but also the length on the road or the map in the same manner. Actually, in the case of measuring the length of a sheet or the like, it is generally used in combination with a cutter (blade) for cutting the sheet.

[0023]

According to the first aspect of the present invention, in a simple paper length measuring counter for measuring the feeding length of moving paper such as roll paper, a female screw is formed on the inner peripheral surface and the outer peripheral surface is directly on the paper. A wheel that comes into contact and rotates is provided, and a male non-screw that meshes with the female thread is formed, and a slide non-rotating shaft that moves in a non-rotating state in a direction perpendicular to the wheel surface is provided,
Since the dimensional scale for measuring the feeding length of the paper is formed on the slide area corresponding to the moving direction of the non-slide shaft and the outer peripheral surface of the foil, the female screw and the male screw are meshed with each other in this manner. By this, a deceleration type in which the thrust non-rotating shaft is moved by one scale for one rotation of the wheel can be made, and the wheel load and the contact pressure between the paper and the outer peripheral surface of the foil can be reduced. As a result, it is possible to provide a length measuring counter having a simplified and mechanically simple structure capable of performing stable length measurement with high reliability.

According to a second aspect of the present invention, in the first aspect of the present invention, the slide non-rotating shaft is a slide mechanism that can be moved to a position of a length measurement reference point and an arbitrary size scale regardless of rotation. Therefore, by simply pushing back the head of the thrust non-rotating shaft, it is possible to immediately return to the original length measurement reference point, so that work efficiency can be improved.

According to a third aspect of the present invention, in the invention according to the first aspect, the female thread of the foil is formed in a protrusion shape, and the protruding female thread is retracted to a position higher than the height of the male thread. Since it is shaped like a leaf spring that can be moved, when pushing back the head of the thrust non-rotating shaft, the protrusion of the leaf spring-shaped female screw moves while temporarily retracting to a position higher than the height of the male screw. The work efficiency can be further improved because the length measurement reference point can be immediately returned to.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the female thread of the foil is formed on only one ridge, and the female thread having only this one ridge is provided at a single or plural locations on the circumferential surface. In this way, by adopting a configuration in which one mountain of the female screw and the male screw are in contact with each other, the wheel load and the contact pressure between the paper and the outer peripheral surface of the foil can be further reduced, and by this, Stable and highly reliable length measurement can be performed.

According to a fifth aspect of the present invention, in the first or second aspect of the present invention, the set value reset position is the position of any dimensional scale formed on the slide region of the slide non-rotating shaft and the outer peripheral surface of the wheel. Since it is set to, it is possible to start the measurement from an arbitrary dimension scale or to start the addition from the position of a certain dimension scale, instead of setting the length measurement reference point and measuring. As a result, the range of uses of the device can be further expanded.

[Brief description of drawings]

FIG. 1 is a perspective view showing an overall configuration of a simple paper length measuring counter that is an embodiment of the present invention.

FIG. 2A is a plan view showing a region where a male screw and a female screw are engaged with each other by cutting away a part thereof, and FIG. 2B is a side view seen from a direction of a non-rotating shaft of the slide.

FIG. 3A is a perspective view showing a state in which a non-rotating slide shaft is moved from a reset position of the dimension scale 0 toward a slide region of a bracket, and FIG. 3B is a plan view showing a link mechanism between brackets. Is.

FIG. 4 is a perspective view showing an overall configuration of a conventional foil length counter.

FIG. 5 is a perspective view showing a state of being covered with a counter cover.

[Explanation of symbols]

1 sheet 15 wheels 15c outer peripheral surface 16 Male 17 female screw 19a slide area 20 Slide non-rotating shaft (slide mechanism) 23, 24 scale

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G01B 5/06 G01B 21/06 G03G 15/00

Claims (5)

(57) [Claims] 1. A simple paper length measuring counter for measuring a feeding length of a moving paper such as a roll paper, wherein a foil is provided on an inner peripheral surface of which a female screw is formed and an outer peripheral surface of which directly contacts the paper to rotate. A slide non-rotating shaft that is formed in such a manner that a male screw that meshes with the female screw is formed and that moves in a non-rotating state at right angles to the wheel surface, and a slide region corresponding to the moving direction of the slide non-rotating shaft and the outer periphery of the foil. A simple paper length measuring counter characterized in that a dimensional scale for measuring the length of the paper fed out is formed on the surface. 2. The invention according to claim 1, wherein the slide non-rotating shaft is formed in a slide mechanism capable of moving to a position of a length measurement reference point and an arbitrary dimensional scale regardless of rotation. Paper length measuring counter. 3. The female thread of the foil is formed in the shape of a protrusion,
2. The simple paper length measuring counter according to claim 1, wherein the counter is formed in a leaf spring shape so that it can be retracted and moved to a position higher than the height of the male screw. 4. The simple paper length measuring counter according to claim 1, wherein the female thread of the wheel is formed only on one mountain and is provided at one or more positions on the circumferential surface. . 5. The set value reset position is set to a position of an arbitrary dimensional scale formed on the outer peripheral surface of the slide region and the wheel corresponding to the moving direction of the non-sliding shaft of the slide. Alternatively, the simple paper length measuring counter according to the invention described in 2.