JPS6067340A - Transfer unit - Google Patents

Abstract

PURPOSE:To simplify the construction of a transfer unit to reduce failures in the transfer unit for supplying recording papers to a recording section by reversing one of transfer means for a predetermined time when the recording paper reaches a squeezing section between a pair of transfer means. CONSTITUTION:When a recording paper 2 is supplied to an ink jet printer, the recording paper 2 in a paper supply cassette 1 is guided by guide plates 4, 5 while reaching a squeezing transfer section having a platen roller 6 and a lower roller 7. After the recording paper reaches there, a paper supply roller 3 also continues to rotate for perposely bending the recording paper 2 so that the recording paper 2 is prevented from being inserted slantly in the squeezing transfer section between the rollers 6, 7. That is, when the recording paper 2 abuts slantly against the transfer section between the rollers 6, 7, the roller 6 is reversed, and when a reverse force is applied to a portion of the recording paper 2 transferred slantly to be sandwhiched by squeezing transfer section, the edge line of the end of the recoding paper 2 becomes parallel to the roller 6. Thereafter, the recording paper 2 is maintained as it is while recorded by a recording head 10 and discharged outside the machine.

Description

DETAILED DESCRIPTION OF THE INVENTION 1. Field of Industrial Application The present invention relates to a conveyance device that conveys a conveyed object, for example, a conveyance device that supplies recording paper as a recorded body to a recording section.

An example of the transport device used for transport will be explained.

Hereinafter, since it is an example applied to feeding, it will be explained as a feeding device.

FIG. 1 schematically shows the main parts of a printer's feeding device.

The recording medium 2 (hereinafter referred to as recording paper) stocked in the paper feed cassette 1 is conveyed by the rotation of the paper feed row 23, and the leading edge of the recording paper 2 is moved between the guide plate 4 and the guide. The sheet is guided by a plate 5 and conveyed to a holding and conveying section where a platen roller 6 and a lower roller 7 are in pressure contact with each other to grip and convey the recording paper. A sensor (not shown) confirms that the leading edge of the recording paper 2 has been conveyed to the nipping conveyance section, and the platen roller 6 is rotated. The lower opening 27 is driven by the platen roller 6, and as both rollers 7.6 rotate, the leading edge of the recording paper 2 passes through the clamping conveyance section of both rollers, and the leading edge of the recording paper 2 is moved to IJJ. It is guided by the moving guide plate 8 and guided on the circumferential surface of the platen roller 6 to be conveyed. When the leading edge of the recording paper 2 is clamped between the platen roller 6 and the upper roller 9, the platen roller 26 stops rotating and the notice plate 8 returns to its original position.

Here, the door 10 is driven to record under the indication J"t3 of a control section (not shown), etc., and information such as characters is recorded on the recording paper 2. Generally, the recording head 10 is moved in the direction of one line. move,
In the column direction, as the platen roller 6 rotates, the position of the recording paper 2 in front of the recording head is moved to record on the entire surface of the recording paper 2. When the recording on the entire surface of the recording paper 2 is completed, the platen roller 6 rotates. However, the i12 recording paper 2 is sent out in the direction indicated by the broken line arrow. This printer repeats the above operations every time it performs recording, and the feeding device feeds the recording paper each time.

Here, the ridgeline of the leading edge of the recording paper 2 fed from the feed cassette 1 is held between the platen roller 6 and the lower roller 7 parallel to the axial direction of the platen roller 26, that is, without any deviation. , there is no problem if it is fed on the circumferential surface of the platen roller 6, but the mystery is that the tip of the recording paper 2 is not parallel to the axial direction of the platen roller 6, but is When it enters the pressure contact area between the platen roller 6 and the lower roller 7,
Various 1iii., harms occur. When the recording paper 2 is conveyed diagonally over the circumferential surface of the platen row 26, the recording made by the recording head 10 on the recording paper 2 is also diagonal.

If recording is performed under such conditions, the recorded information will be difficult to read, leading to a decline in the quality of the printer. Furthermore, if the recording paper 2 is inserted obliquely into the platen roller 6 and the lower roller 7, the portion that is not held by the rollers will float or come off the circumferential surface of the platen roller 26, causing It also comes into contact with parts near the surface, causing a so-called jam phenomenon.

Therefore, troubles when feeding the recording paper are eliminated, and the recording paper 2
In order to write records such as letters parallel to the ridgeline of the tip,
It is necessary to feed the seven ridges at the leading end of the recording paper 2 on the circumferential surface of the grating roller 6 in parallel to the axial direction of the platen row 26. To solve these problems, as shown in Figure 1,
, the ridgeline at the leading edge of the i'fL recording paper 2 is aligned with the platen row 26.
A stopper 11 is provided near the clamping portions of the platen roller 6 and the lower roller 7 so that the platen roller 6 and the lower roller 7 are parallel to +hl+central gyrus.
The recording paper 2 is passed between both rollers 6.7 in the 1-sheet state, and brought into contact with the stopper 11 provided parallel to the axial direction of the platen row 26, and with this stopper 11,
A device has been proposed that corrects the ridgeline of the leading edge of the recording paper 2 in parallel to the axial direction of the platen roller 6.

However, this device initially had a platen row 26 and a lower opening.
27 is released, the stopper 11 is provided at a predetermined position that abuts the recording paper in the feeding path of the recording paper 2, and then when the recording paper 2 is fed by rotation of the platen roller 6, the stopper 11 is placed on the recording paper 2. must be moved from the feed route.

Such a feeding device is prone to multiple failures and is inevitably expensive.

3. Purpose of the Invention The present invention was made in consideration of the above points, and
It is an object of the present invention to provide an inexpensive conveying device (feeding device lf) that has a simple mechanism and is less likely to fail.

4. Structure of the invention, that is, the present invention provides: - In a conveying device 6 in which at least one of the phantom conveying means is rotatable, and the conveyed object is conveyed while being pinched between these conveying means, the conveyed object is The present invention relates to a conveying device characterized in that at least one of the conveying means is rotated in reverse for a predetermined period of time when the conveying means reaches a pinching portion between the conveying means.

5. Implementation The present invention will now be described in detail with reference to an actual sister example shown in FIG. 1111.

FIG. 2 is a schematic side view of an inkjet printer incorporating a conveying device according to a sister embodiment of the present invention as a recording paper feeding device. In order to supply recording paper to this printer, there are two methods: one is to manually transport each sheet one by one, and the other is to automatically transport the recording paper from a paper feeder. First, the case where 6-pin recording paper is manually fed into the printer (so-called manual feed) will be explained. When a sheet of recording paper is inserted into the tray 115, the leading edge of the recording paper is guided by the manual guides 16 and 17, passes between them, presses the actuator of the sensor S1, and connects the platen roller 6 and the bottom. It reaches the part where it is in pressure contact with the roller 7. By checking the operation of the sensor S1 and aligning the rear end of the recording paper with the reference line provided on the manual feed guide 16, 17, etc., this recording paper is set at the normal position 0 Here, the actuator of the sensor St and the sensor S1 described later
The actuator is set within a groove of a 6η section 6A provided in a part of the platen roller 6 in the circumferential direction.

Next, the case where the recording paper 2 is fed from the paper feed cassette 1 will be explained.

When the paper feed cassette 1-1 containing the recording paper 2 is set in the printer and the pongee paper roller 3 is rotated by a motor (not shown), the recording paper 2 in the paper feed cassette 1 is , a conveying force is applied, and its tip passes between the guide plates 4 and 5 while being guided by them, presses the actuator of the sensor S1, and is sandwiched between the platen roller 6 and the lower roller 7. It reaches the transport section. Even if the leading end of the recording paper 2 reaches this point, if the rotation of the paper feed roller 23 continues, the bent portion will be reached at sen 1Zζh, and the rotation of the paper feed roller 3 will be stopped. In this way, the purpose of intentionally bending the recording paper 2 is to allow this part to play a spring-like role, and this force causes the recording paper 2 to move between the platen roller 6 and the lower roller 7. This is to prevent the device from being inserted obliquely into the holding and conveying section of the device. If the recording paper 2 is simply conveyed without bending it, it will be inserted obliquely into the nipping conveyance section between the platen roller 6 and the lower roller 7, and recording will be performed on the recording paper 2 in this state. There is a risk.

Curving the recording paper 2 prevents this.

When the sensors S1 and 82 detect the recording paper 2,
The recording paper 2 is now set, the platen roller 6 starts rotating, and the front end of the recording paper 2 is conveyed on the circumferential surface of the platen roller 6 while being guided by the movable guide plate 8. Then, when the recording paper 2 presses the actuator of the sensor Ss, the movable guide plate 8 moves on the circumferential surface of the platen roller 6 until one end of the movable guide plate 8 comes close to the position of the lower roller 9. Move and continue recording paper 2
to guide you. When the leading edge of the recording paper 2, which has been generally fed on the circumferential surface of the platen roller 6 while being guided by the movable guide plate 8, is held between the platen roller 6 and the upper roller 9, the platen roller 26 The rotation of the movable guide plate 8 is stopped and the movable guide plate 8 returns to its original position.

At this point, this printer is ready to print an i-list on the recording paper 2, and the inkjet recording head IO operates under the instructions of the control unit 011 (not shown), etc. The desired record will be recorded. and,
When recording is completed, the platen roller 6 rotates, and the recording paper 2 is discharged outside the machine along a path indicated by a dashed line.

Note 1: In the feeding device configured as described above, the leading edge of the recording paper 2 is conveyed to the nipping conveyance section between the platen roller 6 and the lower roller 7, and the sensor S1 detects this. When the sensor S2 detects that the trailing edge of the recording paper 2 has curved as described above, the platen roller 6 rotates in the opposite direction to the conveyance direction of the recording paper 2 (in the counterclockwise direction in FIG. 2). ) is configured to rotate for a predetermined period of time. In this implementation, as well as the platen roller 6, the bottom
The shifter is also driven and rotated in reverse, but the lower opening reflex is not driven and may be locked so that it can only rotate in one direction.

In reality, the reverse rotation occurs within a short time of several hundred ms to one second.

Hereinafter, this effect will be explained in detail.

By bringing the leading edge of the recording paper 2 into contact with the nipping conveyance unit and curving the rear end side of the recording paper 2, the leading edge of the recording paper 2 is
The means for aligning the ridge lines parallel to the axial direction of the platen row 26 is effective in aligning the ridge lines parallel to the axial direction of the platen row 26 if the place where the leading end of the recording paper 2 comes into contact is a planar plate that is perpendicular to the traveling direction of the recording paper 2. Zladen: ``1-La6 +ll+lll centripetal alignment can be done.However, as is clear from the drawing in Figure 2,
In this feeding device, the place where the conveyed recording paper 2 comes into contact is such that the ridgeline at the tip of the plastic paper 2 is held parallel to the axial direction of the platen roller 6 by the platen row 26, the lower roller 7, etc. There is no problem if it is done, but the tip of recording paper 2 ♂・1
11th part +? M! However, when the recording paper 2 is not clamped parallel to the axial direction of the platen row 26, even if one end of the leading edge of the recording paper 2 is clamped, the friction between the leading edge of the recording paper 2 and the platen row 26 This means that the other end will not enter the clamping part.

As a result, there are some cases where the rear end 11111 of the recording paper 2 cannot be moved with a spring force as weak as bending it five times. To explain this with reference to FIG. 3, the platen roller 6 is placed in the central direction at the clamping portion. When the recording paper 2 comes into contact with the nipping and conveying unit in the state shown in 2A, the tip 20 of the N12 recording paper 2A is pinched and pressed by the platen roller 6 and the lower roller 7 (not shown). 1μ: Since it is fixed to a certain extent, even if force is applied from the rear end side of the recording paper 2, the recording paper 2A itself will only curve. I can't.

Therefore, when the recording paper 2 comes into contact with the nipping and conveying section between the platen roller 9 and the lower roller 7 in the state shown in 28, the platen roller 6 It was decided to reverse the conveyance direction of the silver paper 2 for a short period of time. If the platen roller 6 is reversed when the leading edge of the recording paper 2 comes into contact with the nipping conveyance section, when the recording paper 2 is carried in diagonally (the situation of two people shown in FIG. 3), Only the portion 2C that is clamped by the clamping/transferring section is subjected to a force in the direction opposite to the conveying direction of the recording paper 2, and the portion 9.2C is removed from the clamp by 7Il, causing the recording paper to come into close contact with the rollers. This will also be temporarily lifted. When a force is applied in the opposite direction to only part of the recording paper 2C, the recording paper 2C is not easily returned to the rear in the aiming state;
On the side, a force is applied in a direction toward the nipping section due to the force caused by the loop of recording paper from the rear.

Furthermore, if this operation is repeated several times, even greater effects can be obtained, and even if the recording paper 2 is initially in the state shown in 2A in FIG. 3, it will become as shown in 2B in FIG. The ridgeline at the leading end of the recording paper 2 is parallel to the axial direction of the platen roller 6.

If the ridgeline of the leading edge of the recording paper 2 is held parallel to the axial direction of the platen r1-26, the recording paper 2 will continue to be recorded while maintaining this state, and will be discharged outside the machine. will be done. Therefore, it is possible to suppress the occurrence of jams such as oblique recording or the recording paper 2 not being conveyed smoothly.

Note that the present invention can be further modified based on its technical idea.

For example, in the implementation column, the case where this conveyance unit j6 is used in an inkjet printer is explained, but it can of course be used in other recording devices 6, and it can also be used to hold a conveyed object in a certain posture t(fi It is also possible to apply it to station buildings where it is necessary to transport the recording paper 2.
Even if the lower opening 27 is rotated in the opposite direction when it comes into contact with the holding part, the same effect as described above can be obtained.

6. Effects of the Invention With the conventional conveying device, in order to convey the object to be conveyed while maintaining it at a certain strength, the device must be set to )NA41-, which is prone to failure and inevitably leads to expensive conveyance. It had become a device.

However, according to the present invention, by simply providing the reversing device 4M in the conveying means, it becomes possible to convey the conveyed object while holding it in a certain posture.

That is, it is possible to provide a transport device that is inexpensive, has few failures, and has commercial performance.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of a printer using a conventional feeding device It; Figs. 2 and 3 show actual sister examples of the present invention; An example of an overall schematic diagram of an inkjet printer using a feeding device (1'l) as a device. Figure 6 is a diagram showing the recording paper being held between the holding and conveying sections. Regarding the symbols used in the drawings, 1...
・・・・・・・・・Paper cassette 2・・・・・・・・・
・・・・・・ 6 Inventory Mr. J 6・・・・−・・・・・・・−
It is a platen roller. Agent Patent attorney Hiroshi Aisaka (and 1 other person) Figure 1 Figure 3 2D Ashi B ＼

Claims (1)

[Claims] 1. In a transport device in which at least one of a pair of transport means is rotatable and transports an object while being pinched between the transport means, the object to be transported is held between the transport means t! A conveying device gi characterized in that at least one of the conveying means is configured to be rotated in reverse for a predetermined period of time when JIS is reached.