JPH03293247A - Paper conveyor - Google Patents

Abstract

PURPOSE:To perform the alignment and conveyance of paper without fail by installing a conveyor roller, having a yet tardier feed rate and preventing any overspeediness of the paper, in a skewing conveyor roller which makes a paper end contact with a guide member installed in a paper conveying passage. CONSTITUTION:A sheet of paper P conveyed to a space between guide plates 1, 2 opposed to each other is sent in the A direction through paired conveyor rollers 3, 4. When the rear end comes off these paired conveyor rollers 3, 4, it is obliquely conveyed by each of skewing conveyor rollers 13-16 set up aslant in the specified angle B direction, and then it hits on guide members 17, 18 and is sent in the A direction again, thus it is carried out to an after-treatment part by conveyor rollers 5, 6. At this time, the paper P comes into contact with ball rollers 10-12 driven in rotation and goes forward rectilinearly, but its overspeediness is prevented by guide rollers 7-9 rotating at a slower feed rate than the skewing conveyor rollers 13-16. Thus, end face alignment conveyance is surely performed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paper conveyance device that can be applied to a copying machine, a printer, etc., which is equipped with a device for generally feeding sheet-shaped paper.

[Conventional technology]

Utility Model Publication No. 61-171766, Utility Model No. 549822
Publication No. 3 and Japanese Utility Model Publication No. 54-844.8 are equipped with diagonal conveyance rollers in order to convey the paper while making it contact with a plurality of guide members provided in the middle of the paper conveyance path. A paper transport device is shown.

In the conveying device disclosed in the above-mentioned Japanese Utility Model Publication No. 6i171766, a plurality of guide members are installed vertically movably with respect to the paper conveyance path, one of the guide members is selected, and the other guide members are used to convey the paper. The structure is such that the paper can be sorted by moving the paper out of the way and bringing the paper into contact with a selected guide member to change the alignment position of the paper.

FIG. 12 is an explanatory diagram showing the conveyance state of a conventional paper conveyance device equipped with diagonal conveyance rollers, in which 1.00 is a guide plate;
Reference numeral 101 denotes a guide member erected on the side of the guide plate 100 so as to extend parallel to the conveyance direction (arrow A) of the paper P;
102 and 103 are diagonal conveyance rollers, and 104 is a conveyance roller.

In the figure, when the paper P is conveyed to the conveyance roller 104, it is further conveyed to the diagonal conveyance roller 102. ]03, and is conveyed diagonally in the direction of guide member ]01 (arrow B) by diagonal conveyance rollers 102 and 103. Then, the paper P is transported in the transport direction A with the end surface of the paper I) in contact with the guide member 101.

[Problems that inventions can solve]

In the above conventional technology, as shown in the explanatory diagram for explaining the force applied to the paper in FIG.
A force F2 for conveying the paper P along the grain and a component force F3 (=FI x sin θ) for pressing the guide member 101 are generated.

The component force F3 is necessary to align the sheets P, but at the same time, it generates a frictional resistance F4 between the guide portion +A' 101 and the sheets P. This frictional resistance F4 acts as a force to rotate the paper P in the direction of arrow 1'1 in FIG.

For this reason, there is a problem that a fold occurs at the corner of the leading edge of the paper P on the guide member 101 side, as shown in the fold D1 in FIG. 12, and in some cases, the paper P cannot be aligned and is conveyed diagonally. There is.

In particular, as shown in FIG. 14, the paper P is conveyed to the conveyance roller 104 in an oblique state, and the corner D2 of the leading edge of the paper P is
When the guide member 101 comes into contact with the guide member 101, the above-mentioned phenomenon becomes noticeable.

SUMMARY OF THE INVENTION An object of the present invention is to provide a paper conveyance device that can reliably align the edges of paper.

[Failure to solve the problem]

The above-mentioned object 1 is a paper transport device that has a diagonal transport roller that brings the end surface of the paper into contact with a guide member provided in the paper transport path, and transports the paper in alignment while pressing the end surface of the paper against the guide member. A conveyance roller that prevents rotation of the paper is provided on a side far from the guide member, and the feed speed of the conveyance roller is made slower than the paper feed speed by the diagonal conveyance roller along the guide member. This is achieved by

[Effect]

The conveyance roller that prevents over-rotation works to cancel the rotational torque of the paper by conveying the paper slower than the theoretical paper conveyance speed along the guide member, and the diagonal conveyance roller makes sure that the edge of the paper is properly aligned with the guide member. This ensures that the paper is properly aligned and passed through.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

1, 2, and 3 are a plan view, a front view, and a side view, respectively, of a sheet 1 forwarding device according to an embodiment of the present invention, and 1 and 2 are installed facing each other. guide plate, 3.4. ．． 5.6 a pair of conveyance rollers that conveys the paper Pfc parallel to the conveyance direction (arrow A); 7. 8. 9 is a steel ball or resin ball roller 10.11.1 that rotates under pressure to convey the paper P in the straight direction (arrow A).
A guide roller made of urethane rubber etc. that is in contact with 2.
1314.15, 1.6 are diagonal conveyance rollers that feed the paper P in a direction (arrow B) that intersects with the conveyance direction at a predetermined angle; 17.18 is diagonal conveyance roller 13, 1415.1.6
This is a guide member that is retractable from the side between the guide plates 1 and 2 in the feeding direction B of the paper Y) and is installed parallel to the general feeding direction A of the paper 1.

In FIGS. 1 to 3, the paper P conveyed between the guide plates 1 and 2 is received by a pair of conveying rollers 34 in the front, and
The receiver is passed to the diagonal conveyance rollers 13, 1.4.15.16. The force for transporting the paper P by the pair of transport rollers 3.4 is set large, and the paper P is sent in the transport direction A, and as long as the trailing end does not come off the pair of transport rollers 3.4, the paper P is tilted diagonally.
Saitsu Lola 1.3. 14. 15. 16, it is not sent in the diagonal direction B. Also, the diagonal conveyance roller 13.14
゜15.16 and guide rollers 7.8.9 are set to have a small conveying force for the paper P, and are set to values that will not cause damage to the paper P even if the paper P stops midway. ing.

When the rear end of the paper P comes off the front pair of conveyance rollers 34, it is conveyed diagonally by the diagonal conveyance rollers 13.1/II5.1G until it comes into contact with either one of the guide members 17.18. guide member], 7.18, and is sent in the input direction by a pair of conveying rollers 5.6 at the rear to a post-processing section such as a paper discharge tray (not shown), a gluing device, a stable device, etc. .

During the conveyance of 11jg of paper P in contact with the guide member 17.1.8, the diagonal conveyance roller 13.14.1.5.16 slips between the paper P and the guide member 17.1.8.

Further, the guide members 17 and 18 are used for sorting 1 of the paper I).
Generally, a plurality of sheets (in this example, one sheet) are installed for this purpose, and one of them protrudes into the paper conveyance path between the guide plates 1 and 2, and the other is used for use (evacuation from the conveyance path). do.

Since there are two in this embodiment, the inner guide member 17 has a retraction mechanism.

FIG. 4 is a diagram of the guide member and drive means, in which a chi 1ζ member 17 is provided in the through hole ia, ll) provided in the guide plate 1.2 so that it can be accessed, and 19 20 is a concave guide formed on the right side of the guide member 17 and comes into contact with the paper P, 20 is a concave receiving portion formed on the front side of the guide member 17, and 21 is a pin provided below the receiving portion 20 of the guide member 170. , 22 is a solenoid which is a driving means fixed to the frame 23, and 24 is pivotally supported, and its lower end loosely fits into the operating rod 22a fixed to the solenoid 22, and its upper end loosely fits into the pin 21. A rotatable lever 25 is erected on the negative side of the frame 23, and swingably supports the guide member 17 by fitting the upper end 25a into the receiving portion 20 of the guide member 17. The supporting member 2G is a spring that urges the guide member 17 to rotate counterclockwise around the upper end 25a of the supporting member 25.

FIG. 4 shows a state in which the guide member 17 is retracted from the paper 1 general feeding path between the rear F plate 1.2, and in this state, the operating rod 22a is pulled to the right by the solenoid 22. When the lever 24 rotates counterclockwise, the guide member 17 is retracted from the paper 1 general feeding path via the pin 21 against the elastic force of the spring 26.
The guide member 17 is held in an oblique position, and the guide member 17 is
The − surface is parallel to the paper transport surface so as not to become an obstacle for the paper P to pass through the paper 1 general transport path.

FIG. 5 shows a state in which the guide member I7 is selectively used. From the state shown in FIG. The guide member 17 receives the force,
It rotates counterclockwise around the -1 end 25a of the support 25, and is raised and held in the through holes 1a and 1b of the guide plate 1.2, so that the paper P can be guided. In this state, the weight of the guide member 17 and the tensile force of the spring 26 cause the receiving portion 20 of the guide member 17 to move toward the support body 25.
It does not come off from the second end 25a.

In this way, by rotating the guide member 17 to move it in and out of the paper 1 general feeding path, the driving energy is reduced to about 1/2 compared to the conventional structure in which the guide member is moved up and down. Therefore, a small solenoid 22 can be used. In general, the smaller the solenoid, the faster the operating speed, so the evacuation and return operations of the guide part 17 will take a shorter time.

In this embodiment, diagonal conveyance rollers 13, 14, 15, 16
is I transport direction A4. The two guide members 17 and 18 are provided at two locations along the orthogonal directions with two spaces between each other, but this is because the two guide members 17 and 18 are selectively used. , the distance by which the paper P is fed diagonally becomes longer.

FIG. 6 is an explanatory diagram for explaining the basic operation of preventing rotation of the paper P, as seen from the bottom surface of the general feeding device pη, and the friction coefficient between the guide member 17 and the paper P is determined by the material Q is about 0.1 to 0.3.

Suitable materials for the guide member 17 include Teflon resin and polyester resin, which have a small coefficient of friction with the paper P, and if it is a metal, Tsuki Y'-1, which has high hardness, is suitable. The one that has been applied is good.

Here, if the feed speed of the diagonal harp feed roller 13 is vl, then the feed speed ■2 in the conveyance direction A is 1γ of the guide member 17.
In the case of friction coefficient or cello, the angle formed by Otsukoba, V, and V2 is θ
As, V,
% to 35% slower. Therefore, the feed speed of the guide roller 7 is made slower than the actual feed speed v2' in the conveyance direction A, and the conveyance force generated by the guide roller 7 is reduced to the rotational torque in the direction T generated by frictional resistance F4. Set to a value that cancels out. By doing this, the force F with which the diagonal conveyance roller 13 presses the paper P against the guide member 17 acts on the entire end surface of the paper P, which prevents damage to the leading edge corner of the paper P as in the conventional example. It will be gone. Further, the feed speed in the conveyance direction is determined by the feed speed (5) by the guide rollers 7, resulting in a stable conveyance speed.

If the feed speed V5 of the guide roller 7 is much slower than the feed speed V2, the paper can be stably conveyed, and according to experiments, there was no problem in conveyance even when the feed speed was slowed by about 50%.

However, when considering the transportation of thin paper, for example, 45 kg paper (52.3 g/m2>), the limit is to slow down the speed by about 35%.

In addition, by disposing guide rollers 7 with a slow feeding speed, the paper P can be moved as shown by the two-dot chain line until the paper P comes into contact with the guide member 17 due to a speed difference with other transport rollers. The direction in which P contacts the guide member 17 from the rear end (T
The paper P will be rotated once in the opposite direction to 1),
The contact will be made in good condition.

Note that both the diagonal conveyance roller 13 and the guide roller 7 have a lower drive roller C made of rubber, as shown in FIG.
- It is preferable to use ball b as an example, and if the upper side is ball b, ball b can rotate without directivity, making it easier to displace the paper P in the conveying direction. Further, the conveyance force may be set based on the difference in specific gravity depending on the material of the ball b, or may be set based on the difference in the diameter of the ball b.

FIG. 9 is an explanatory diagram showing the operation of the first embodiment of the present invention, in which the diagonal first general feed roller 1.3. 14. ．． The feed speeds of 15.16 are all the same, and the diagonal conveyance rollers 1.3.
5% to 35% of the theoretical conveyance speed Vcosθ in the direction along the guide members 17°18 of 14, 15, and 16.
Gaitoco 07.8.9 with slow feed speed is installed.

In this embodiment, two diagonal conveyance rollers are arranged in parallel to form a 4J
This allows even small-sized paper to be transported stably. Further, as shown in the figure, a sheet P having a short shape with respect to the transport direction A and a long shape in a direction perpendicular to the general transport direction A.
In the case of conveyance, the diagonal feed angle θ of the diagonal conveyance roller 13.15 on the side of the guide members 17, 1.8 is the largest, the diagonal feed angle of the intermediate diagonal conveyance roller 16 is θ/2, and the diagonal feed angle θ of the diagonal conveyance roller 13.15 on the side of the guide members 17, 1.8 is the largest, Although it is best to set the diagonal feed angle of 14 to zero, it is best to use diagonal conveyance rollers 13.14 with various feed angles.
14.1516 is not preferable because it complicates the mechanism.

Therefore, a guide roller is provided close to the intermediate diagonal conveyance roller 16 to perform a feed with a feed angle of 0 in the conveyance direction, thereby obtaining the above-mentioned conveyance means with an intermediate diagonal feed angle of θ/2.

By the way, when the paper P is brought into contact with the guide members 17 and 18, it is preferable to contact it from the rear end of the paper P in the general feeding direction A, as in the paper 3 P shown in FIG. , the guide member 1.7.18 may be conveyed obliquely before reaching the part 1.7.18. In order to make the paper P slanted downward to the right as shown by the paper P2, as shown in FIG. 11, the guide member 17.
Among the pair of conveying roller pairs 40.4.1 located upstream in the conveying direction A along the guide member 17.18, the conveying roller pair 40 on the guide member 17. You may use rollers with different diameters. Note that the pair of transport rollers 40 and 41 are pressurized by springs 42 and 43 so that the paper P does not slip.

FIG. 8 is an explanatory diagram of a second embodiment of the present invention, in which diagonal conveyance rollers 32, 33, 34, and 35 are provided at two locations in mutually orthogonal directions, spaced apart from each other in the conveyance direction, and offset from each other. , the diagonal conveying roller 3 remote from the guide member 17.18
3.35 is approximately 5% to 35% slower than the nearby diagonal conveyance roller 32.34, and 1/3 to 1/1
By setting the conveying force to about 0, it is possible to stabilize the feeding when the paper P is conveyed while being in contact with the guide members 17 and 18.

In addition, even if a pair of diagonal conveyance rollers 32 and 34 are provided slidingly relative to the guide member 7.18, the guide member 1
7. By setting the conveyance force of the diagonal conveyance rollers 34 farthest from the diagonal conveyance rollers 34 to about 1/3 to 1/10 of that of the diagonal conveyance rollers 32 close to the diagonal conveyance rollers 32, thin paper can be conveyed satisfactorily.

Said diagonal conveyance roller 32.33.34. ．． The conveying force of 35 is preferably about 30g to 150g, preferably 100g.
The front and back are good.

〔Effect of the invention〕

As described above, according to the present invention, by providing the conveying roller with a slow feeding speed to prevent the rotation of the paper on the side far from the guide member, the end face aligned conveyance of the paper by the diagonal conveying roller is ensured. A paper conveyance device can be provided.

[Brief explanation of drawings]

1, 2, and 3 are a plan view, a front view, and a side view, respectively, of a first embodiment of a paper conveying device according to the present invention, and FIG. 4 is a guide 5 member and drive means of a wooden embodiment. Fig. 5 is a block diagram of the guide member and drive means in Fig. 4 when they are not in operation, Fig. 6 is an explanatory diagram of the basic operation of preventing rotation of paper, and Fig. 7 is a diagram of the conveyance roller and guide. 8 is an explanatory diagram of the second embodiment of the present invention. FIG. 9 is an explanatory diagram showing the operation of the first embodiment.
Figure 0 is an explanatory diagram of paper conveyance, Figure 11 is a configuration diagram of 11 pairs of general feeders, and Figures 12, 13, and 14 are explanatory diagrams of paper conveyance in a conventional paper conveyance device. be. 1.2...Guide plate, 7.8.9-...Guide roller,
13.14, 1.5.16.32, 33, 34.35・
...Diagonal conveyance roller. 6 Figure 4 Figure Figure zzzzσ Figure 8 Figure Figure 11 Figure 2 Figure 3 Figure 04

Claims (1)

[Claims] In a paper conveyance device that has an oblique conveyance roller that brings an end surface of the paper into contact with a guide member provided in a paper conveyance path, and conveys the paper in alignment while pressing the end surface of the paper against the guide member, with respect to the diagonal conveyance roller, Paper transport characterized in that a transport roller for preventing rotation of the paper is provided on a side far from the guide member, and the transport speed of the transport roller is slower than the paper transport speed of the diagonal transport roller along the guide member. Device.