CN1143293A

CN1143293A - Roll type recording paper flattening mechanism

Info

Publication number: CN1143293A
Application number: CN 95109752
Authority: CN
Inventors: 陈定良
Original assignee: QUANLU CO Ltd TAIWAN
Current assignee: QUANLU CO Ltd TAIWAN
Priority date: 1995-08-11
Filing date: 1995-08-11
Publication date: 1997-02-19

Abstract

The recording paper flattening mechanism is esp. suitable for facsimile printer, form printer and other printers using roll-type recording paper. It utilizes the tension which is produced during driving forward in controlling counter-rolling angle applied to paper. That is to say, paper roll with small diameter has small rolling degree needs small counter-rolling angel and vice versa. Thus, the present invention changes counter-rolling angle with the tension in paper and the interrelation between the counter-rolling guide plate and the elastic component.

Description

Roll type recording paper flattening mechanism

The present invention relates to a kind of roll type recording paper flattening mechanism, be particularly useful for facsimile machine, printer etc. use the machine of cylindric roll recording paper.

Known facsimile machine has additional apparatus for leveling, also has not establish attachment device.The facsimile machine that does not have apparatus for leveling, paper are without leveling, and paper becomes rolled state, and be so stackability is poor, all very inconvenient on reading or preserving.As for installing apparatus for leveling additional, its mechanism is too complicated, increases machine cost, and the paper roll that changes the outfit is not easy the leveling poor effect.At present at the product that similar leveling function is arranged on the market, and various existing patented technologies, but mostly have a common fault, that be exactly crimpness be to change to some extent along with the size of reel diameter.When diameter was big, the crimpness of its paper was less, and relatively, when diameter hour, its crimpness is just bigger.Make identical leveling effect for the coil paper that makes different crimpnesses, just must possess can test paper coil diameter size device.General known checkout gear has two kinds of electronic type and mechanical types, and wherein mechanical type can reduce link-type and tension type again.Electronic type is opened the Japan Patent spy and have been disclosed a kind of electronic type checkout gear as shown in Figure 1a in clear 61-146575 number as shown in Figure 1a.Label 111 is the amount of crimp detector, and signal acts on roller with electromagnetically operated valve 123 after handling via 113.Its shortcoming is that manufacturing cost is too high and effect is not good again.Open the Japan Patent spy and to have disclosed a kind of link-type checkout gear shown in Fig. 1 b in the clear 61-124464 document, the eccentric wheel 105 among the figure on the eccentric shaft 109 deflects along with the size of paper roll 101.When reel diameter hour, eccentric wheel 105 is to left avertence.Its shortcoming is complex structure, manufacturing cost height.Open the Japan Patent spy and to have disclosed a kind of checkout gear shown in Fig. 1 c in the clear 60-56764 document, connecting rod 125 detects the size of paper rolls 103 among the figure, and drive

link

126 and 121 makes connecting rod 121 do knee-action.When reel diameter hour, upwards action of connecting rod 121.Its shortcoming is that member is many, and the paper roll inconvenience changes the outfit.In Japanese patent laid-open 4-260564 document, disclosed the tension type checkout gear shown in Fig. 1 d.When the diameter of the paper roll 155a among the figure was big, the paper tension between paper roll 155a and the lettering roller 156a was big, led paper roller 118 with axle 104 rotations and make, and did the anticlockwise rotation; And when diameter hour, tension force diminishes, and roller 118 is subjected to the effect of a return spring, and does rotation clockwise.Its shortcoming is that the paper tension between paper roll 155a and the lettering roller 156a is very little at paper roll hour, we can say hardly to exist.Therefore when rouleau paper, the effect of leveling just is not so good as good shown in Fig. 1 b and the 1c.

The objective of the invention is on the basis that overcomes above-mentioned prior art defective, low cost of manufacture a kind of both simple in structure is provided, and paper flattens the flattening mechanism of the good roll paper of effect.

For achieving the above object, technical solution of the present invention is that employing mechanical tension mode is a design basis, and flattening mechanism system is attached in the mechanism that prints with motor transmission, and utilizes intrinsic motor to come transmission, does not drive and do not need to add in addition power.According to flattening mechanism provided by the present invention, when paper sheet delivery, use one to lead paper roller and be used as pillar and guide paper, make the paper can be to the opposite direction bending of curling, with the formed crimpness difference of paper roll size, also guide out relative anti-crimp force, adjust its required warp curvature.In order to the leading portion of guaranteeing paper, stage casing, and back segment all can reach the effect of thorough leveling.When usual inoperation, motor is inactive state, is in free state between the bent guide plate of the warp in the flattening mechanism and the paper and does not contact.Therefore when flattening mechanism time spent not, paper can not cause top of form that the folding line phenomenon is arranged because of being subjected to the effect of the bent guide plate of warp for a long time.Have only when motor just changes (i.e. rotation in a clockwise direction), the warp Qu Zuoyong of flattening mechanism just can act on paper.When reel diameter diminished, the bent guide plate of the warp of flattening mechanism was being pressed and is being led paper roller, and paper is advanced betwixt, because of friction therebetween, and makes paper keep certain force of strain, makes that so paper leveling effect is better.

Preferred implementation of the present invention and effect thereof will contrast accompanying drawing and be described in detail as follows:

Fig. 1 a to 1d represents the diagrammatic side view of each prior art;

Fig. 2 represents that the present invention's end view (wherein omits with irrelevant member is described.)；

Fig. 3 represents the discrete parts stereogram that the present invention is main;

Stereogram after the assembling of Fig. 4 presentation graphs 3 discrete parts;

Fig. 5 represents the part stereogram of another embodiment of the present invention;

Fig. 6 and Fig. 7 are respectively operate condition schematic diagram of the present invention.

Shown in Fig. 2,3, flattening mechanism of the present invention mainly by: lead paper roller 1, the bent guide plate 2 of warp, driven gear (8,10,11) and transmission component 30 constitute.

Be illustrated among Fig. 2 lid 13 is raised to the position 13p that dotted line is represented, a paper roll 14 is put into paper roll container 15, and end before the paper is inserted between lettering roller 22 and the print head 9 through leading paper roller 1.Then original position is returned in lid 13 passes, be connected in this moment on the pillar 21 front end axles 18 on the lid 13 and can make the warp song guide plate 2 of pivots, maintain original position m by means of 4 (see figure 3)s of the spring in the transmission component 30.This moment, paper 14s was not subjected to the pressure effect of the bent guide plate 2 of warp, therefore can not cause the front end of paper to have tortuous phenomenon.(the warp song is opposite with the original direction of curling of paper roll.)

When motor 12 rotates in a clockwise direction (hereinafter to be referred as just changeing), drive driven gear 11,10,8 and make lettering roller 22 rotate in a counter-clockwise direction (hereinafter to be referred as counter-rotating).Paper 14s is drawn forward, and enters automatic cutting device 17, also is the beginning of lettering simultaneously.When gear 10 is just changeing, make transmission component 30 actions.Transmission component 30 comprises and reverses gear 6, clutch spring 5, projection 3, returning spring 4 and E type clasp 20.Between driven gear 10 and when reversing idle pulley 7 between the gear 6 and being in counter-rotating, the gear 6 that reverses of engagement is just being changeed, clutch spring 5 is owing to reverse the relation that gear 6 is just changeing, and pins the lateral margin 6c that reverses gear 6.Because of one of spring 5 end 5e is stuck on the outer rim notch 3e of projection 3, so being reversed gear 6, projection 3 drives, doing equidirectionally just changes, thereby warp song guide plate 2 also just changes.When the bent guide plate 2 of warp touches paper 14s, because the tension force of paper (weight of big coil paper 14 is bigger, and its tension force is greater than rouleau paper 14e) makes the bent guide plate 2 of warp be subjected to a reciprocal power (with respect to just changeing).This makes every effort to promote makes clutch spring 5 and lateral margin 6c become releasing orientation by original locking relation, by the friction that is produced between lateral margin 6c and the spring 5, comes balance tension to bestow counterclockwise power of guide plate 2, thereby keeps guide plate 2 in certain position.

Fig. 4 is the bent guide plate 2 of warp among Fig. 3, pillar 21, axle 18, and the stereogram of transmission component 30 after assembling.

Fig. 5 represents another embodiment of the present invention, wherein simplified transmission component 30, make it only have a spring 4 ' and E type clasp 20, and the effect of spring 4 ' is opposite with the direction of rotation of above-mentioned returning spring 4, make the bent guide plate 2 of warp bear a torsion that is just changeing makes it press to paper always, thereby make the degree of paper warp song and the equalization of strain in the paper, to reach best warp Qu Xiaoguo.

Moreover as shown in Figure 6 and Figure 7, just the present invention's effect is further specified.When big coil paper (as shown in Figure 6), the diameter of paper roll 14 is bigger, and its amount of crimp is less, and the angle [alpha] that the bent guide plate 2 of required warp acts on paper is also just bigger; When rouleau paper 14e (as shown in Figure 7), its amount of crimp is bigger, relatively, the angle beta that the bent guide plate 2 of required warp acts on paper is also just less, this moment, paper was very little at the tension force of leading between paper roller 1 and the lettering roller 22, but because of the face 2a of the bent guide plate 2 of warp is pressing paper, because the relation of friction, make paper have Necessary Tensility leading between paper roller 1 and the lettering roller 22, therefore make the effect of leveling more obvious.

In sum, the present invention compares with known apparatus for leveling, can summarize down Be listed as several advantages or useful effect.

(1) paper roll that changes the outfit is easy, because the bent guide plate of warp is along with the opening of lid, and Break away from paper, can be because of flattening mechanism not be arranged, and cause the obstacle of dress paper.

(2) flattening mechanism can be adjusted required warp automatically along with the size of reel diameter Curvature.

(3) simple in structure, part is few, is fit to a large amount of production.

(4) in the time of little coil paper, still pressing paper because of the face of guide plate, make paper have essential tension force, therefore make the effect of leveling better.

(5) if pass over for because of being subjected to the effect of the bent guide plate of warp for a long time, make top of form that the folding line phenomenon be arranged, can change mechanism to such an extent that more simplify, become another embodiment as shown in Figure 5, gear, projection and clutch spring are dispensed, returning spring is made into by original dextrorotation torsion spring left-handed, so except above-mentioned folding line phenomenon, other effect is the same, but that cost can be reduced to is lower.These changes and other improvement also should be included within the protection range of patent application of the present invention self-evidently.

Claims

1. roll type paper flattening mechanism, by leading paper roller, the bent guide plate of warp, driven gear, transmission component constitutes, and it is characterized in that:

The bent guide plate of one warp places the below of machine cover, along with the paper roll of leading between paper roller and the lettering roller is swung because of the variation of the paper tension that weight produced, to cause the balance of tension force;

One transmission component comprises a returning spring, is loaded in the projection, and projection is as the fulcrum of the bent guide plate rotation of warp, and bent guide plate one end of warp connects projection, and the openend outer rim that reaches this projection has a groove, in order to place the trip of clutch spring; Described returning spring makes the bent guide plate of warp be returned to usual position, and makes paper can not produce folding line because of being pressed for a long time;

Thus, when paper feeding, clutch spring rotates to a direction, makes the downward platen of the bent guide plate of warp up to the tension force of paper during greater than its downward pressure, and spring can unclamp, two sides' pressure balance, thus arrive suitable leveling position.

2. according to the roll type paper flattening mechanism of claim 1, it is characterized in that: described transmission component comprises: an idle pulley, rotate with paper pushing motor through driven gear; One reverses gear, is engaged in this idle pulley; One clutch spring is placed in the lateral margin that this reverses gear; One projection links together with the bent guide plate of warp, and is sleeved on the axle of pillar, and rotatable, and the one end has hollow open, and in outer rim one notch is arranged, and clutch spring places opening, and one of this spring end engages with notch; An and returning spring, when paper pushing motor rotates, clutch spring is dwindled internal diameter by gear torsional, and twist tight projection, driving the bent guide plate of warp depresses to the paper face, when the tension force that surpasses paper when downward pressure added the torsion of returning spring, clutch spring was released again, thereby the bent guide plate of warp can remain on the bent position of suitable warp; When paper pushing motor stopped, the bent guide plate of warp up turned to original position promptly by the returning spring effect, makes not cause staying permanent folding line on the paper again.

3. according to the roll type paper flattening mechanism of claim 1, it is characterized in that: this transmission component is for having a helical spring, one end is engaged in the axle of pillar, and the other end is engaged in the bent guide plate of warp, and the bent guide plate of this warp is rotated in the certain limit around the direction that axially faces toward paper.

4. according to each roll type paper flattening mechanism in the claim 1 to 3, it is characterized in that: the bent guide plate of warp can be pushed down when little paper roll and lead paper roller, makes paper generation tension force therebetween.