CN2609880Y

CN2609880Y - Paper separating mechanism

Info

Publication number: CN2609880Y
Application number: CN 03243272
Authority: CN
Inventors: 苏育仁
Original assignee: Lite On Technology Corp
Current assignee: Lite On Technology Corp
Priority date: 2003-04-11
Filing date: 2003-04-11
Publication date: 2004-04-07
Anticipated expiration: 2013-04-11

Abstract

A paper-picking mechanism which is arranged on one side of the paper feeding box is a mechanism with high degree of freedom, which comprises a paper-picking roller, a plurality of gears and a plurality of connecting bars. When the paper-picking roller is actuated and rotated about the paper feeding direction, a force moment is produced which can keep the paper-picking roller apply force to the upper most paper in the paper feeding box and provide automatic compensation paper-picking force, meanwhile because of the adjustment of the component place arrangement, the gear number the conveying power required is reduced and also the energy loss and operation noise are further reduced.

Description

Paper-fetching mechanism

Technical field

The utility model relates to a kind of paper-fetching mechanism, particularly a kind ofly adopts less gear transmission power, and has than low energy losses and noise, can get the paper-fetching mechanism of paper strength by automatic compensation simultaneously.

Background technology

Generally speaking, the paper transport sector of duplicator, chopping machine or facsimile apparatus all can have two rubber rolls that friction coefficient is bigger, and one is pickup roller, and another then is a paper-feeding roller; After the paper of the superiors is separated by pickup roller, by paper-feeding roller it is sent to print module again and prints.Propulsion source can be configured between these two rubber rolls usually, again by transmission component such as gear cluster or belt, transmits power on these two rollers.

Under the trend of " miniaturization " and " function integration " is ordered about, no matter be simple chopping machine, duplicator, facsimile apparatus, or the multifunctional paper feeding machine (MFP) of integration photomechanical printing, printing, fax and scan function, all must face compiling and rearrangement on the entity structure; Therefore, get paper or simplified of paper advance mechanism is imperative with existing.

For utilizing gear cluster to transmit power for the paper-fetching mechanism of pickup roller, because during gear transmission power, friction to each other can cause degradation of energy and produce noise, so clearly, the number of gear is few more good more.But, existing practical mechanism but is far from it, and utilizes the design that the big miniature gears that surpasses more than ten transmits power can be found everywhere; Its reason is except in the entity structure design, and the path configurations of gear transmission has outside its restriction, and the another one reason is in order to allow pickup roller possess the automatic compensation ability, cause structurally limiting factor.

U.S. US 5527026 patents with LEXMARK company are example, its pickup roller (13) is to be articulated on the gear of gear row (a 1) lowermost end, gear row power wheel (3) is foremost then fixed, this will make whole gear row (1) and pickup roller (13) move according to the paper number, make pickup roller (13) remain on the top paper surface.Simultaneously, when all the gear rotations in the gear row (1) drive pickup roller (13), can produce moment allows pickup roller apply positive force (normal force) in the top paper, because the size of this positive force can comprise weight, density or stiffness variation along with paper property, and can get the size of paper strength at different paper characteristic automatic compensation, multi-paper feed or problem that can't paper feed can not take place.

In other words, if pickup roller is when being fixed in one " swing arm ", for example aforesaid gear row just can allow pickup roller contact with the top paper at any time, though in the paper box paper what, can also possess simultaneously get the paper positive force can with the ability along with the paper property increase and decrease.

But, the position that is provided with that propulsion source was mentioned in the front is between pickup roller and paper-feeding roller, therefore, get back to the example of the US of LEXMARK company 5527026 patents, because what propulsion source was assumed as a matter of course must be positioned on the paper feed direction (17), so the shortest power transmission path should be listed as gear the power wheel (3) of (1), be arranged between pickup roller (13) and the propulsion source; But, this patent is on the contrary, makes power must be delivered to power wheel (3) at a distance, also just needs more gear just can reach, and the noise of its power waste and generation is comparatively serious.

The utility model content

The purpose of this utility model is to provide a kind of paper-fetching mechanism, and it has solved existing paper-fetching mechanism and has used too much gear, causes the shortcoming of serious power waste and noise.

The utility model provides a kind of paper-fetching mechanism, and consist predominantly of transmission gear, idle gear, swing arm, get paper gear and pickup roller, wherein,

Described transmission gear is used to receive the rotary power of transmission from a propulsion source, has a fixing axle center, and connects a propulsion source indirectly;

Described idle gear and transmission gear engagement, the axle center of its axle center and described transmission gear links with a first connecting rod;

Described swing arm has a fixed end and a swinging end, and can fixed end be the axle rotation;

One gets the paper gear, is positioned at the swinging end of this swing arm, when it is subjected to the driving of this transmission gear at this idle gear, keeps engagement with this idle gear; And

One pickup roller is got the coaxial setting of paper gear with this, when it is subjected to that this transmission gear drives and when paper feed direction rotate, produces a moment and make this pickup roller force in the paper of the interior the superiors of this feeding box.

Preferably, described transmission gear is between described pickup roller and propulsion source;

The axle center of described axle center of getting the paper gear and described idle gear links by a second connecting rod, makes the two keep engagement;

Can be provided with a gear between described idle gear and the described transmission gear, respectively with idle gear and transmission gear engagement; This gear pivot can be located on the described first connecting rod;

Described idle gear and get between the paper gear and also can further be provided with a gear is got the paper gear mesh with this idle gear and this respectively; This gear pivot can be located on the described second connecting rod;

Described transmission gear can be arranged at the inner side edge of described feeding box;

Described transmission gear also can be arranged on the jack-post of described feeding box inner side edge;

Described transmission gear articulates rotation mutually with a gear cluster that is arranged at the described feeding box outside, and this this propulsion source of gear cluster direct connection, and this gear cluster transmits the rotary power of this propulsion source to this transmission gear;

The fixed end of described swing arm has a hollow and connects post;

The fixed end of described swing arm is articulated in the axostylus axostyle of extension from described feeding box madial wall;

The swinging end both sides of described swing arm are extended one first contact pin and one second contact pin respectively; Describedly get the outside that the paper gear is arranged at described first contact pin; Described pickup roller is arranged between described first contact pin and described second contact pin;

Described feeding box is a vertical type feeding box, or is a horizontal feeding box.

Advantage of the present utility model is that this paper-fetching mechanism can provide pickup roller the self-conpensating paper strength of getting, and simultaneously because the adjustment of member position configuration has reduced the required gear quantity of transferring power, and can further reduce degradation of energy and running noise.

Description of drawings

Fig. 1 is the stereo appearance figure of first preferred embodiment of the present utility model;

Fig. 2 is the External view of the first preferred embodiment opposite side of the present utility model, and wherein feeding box is represented by dotted lines;

Fig. 3 is the diagram of work of first preferred embodiment of the present utility model, and it has shown the paper mode of getting of paper-fetching mechanism;

Fig. 4 is the diagram of work of first preferred embodiment of the present utility model, and it has shown the state of paper-fetching mechanism when feeding box does not have paper;

Fig. 5 is the stereo appearance figure of second preferred embodiment of the present utility model;

Fig. 6 is the External view of the second preferred embodiment opposite side of the present utility model, and wherein feeding box is represented by dotted lines;

Fig. 7 is the diagram of work of second preferred embodiment of the present utility model; And

Fig. 8 is the diagram of work of the 3rd preferred embodiment of the present utility model.

Wherein, description of reference numerals is as follows:

Paper-fetching mechanism 100 transmission gears 110

Idle gear 120 swing arms 130

Fixed end 131 connects post 132

Swinging end 133 first contact pin 134

Paper gear 140 is got in second contact pin 135

Pickup roller 150 first connecting rods 160

Second connecting rod 170 paper-fetching mechanisms 200

Transmission gear 210 idle gears 220

230 gears 240 of first connecting rod

Pickup roller 250 paper-fetching mechanisms 300

Feeding box 400 jack-posts 410

Axostylus axostyle 420 paper 430

Paper feed direction 440 gear clusters 500

Feeding box 600 feeding box 700

The specific embodiment

See also Fig. 1 to Fig. 4, the paper-fetching mechanism 100 that first preferred embodiment of the present utility model is provided, it is arranged at the inboard of feeding box 400, mainly by transmission gear 110, idle gear 120, swing arm 130, get paper gear 140 and constituted with pickup roller 150, what below describe each member in detail is provided with position, interrelation and function mode.

At first see also Fig. 1 and Fig. 2, transmission gear 110 is arranged on the jack-post 410 of feeding box 400 inner side edges, its axle center is fixed, and can articulate rotation mutually with the gear cluster 500 in feeding box 400 outsides, and this gear cluster 500 transmits the rotary power of a propulsion source (figure does not show) to transmission gear 110.

Idle gear 120 and transmission gear 110 engagements, the axle center of its axle center and power wheel 110 links with first connecting rod 160; This first connecting rod is long plates.

Swing arm 130 also is the growth sheet, with the upper end as fixed end 131, what this fixed end 131 had a hollow laterally connects post 132, is articulated in the axostylus axostyle 420 of extension from feeding box 400 madial walls by it, makes the post 132 that connects that whole swing arm 130 can fixed end 131 be an axle rotary oscillation; Swing arm 130 bottom sides are as swinging end 133, and these swinging end 133 both sides are extended first contact pin 134 and second contact pin 135 respectively downwards.

Get paper gear 140 and be arranged at the outside of first contact pin 134 of swing arm 130, not only with idle gear 120 engagements, its axle center more links with the axle center of idle gear 120 second connecting rod 170 by sheet.

Generally speaking pickup roller 150 surfaces have bigger friction coefficient, in fact mostly are rubber wheel, and it is arranged between first contact pin 134 and second contact pin 135 of swinging end 133 of swing arm 130, and with get the 140 coaxial settings of paper gear.

More than be the structure and the interrelation of paper-fetching mechanism 100 each member.Please continue to consult Fig. 3 and Fig. 4, can know and find out that paper-fetching mechanism 100 is essentially one " four-bar linkage ", except first connecting rod 160, outside second connecting rod 170 and the swing arm 130, fixedly can be considered the 4th connecting rod between the axle center of the fixed end 131 of swing arm 130 and transmission gear 110, wherein idle gear 120 and pickup roller 150, owing to the characteristic of " four-bar linkage " has very high degree of freedom, add the moment that rotation produces, no matter paper more (Fig. 3) or do not have paper state (Fig. 4) can allow pickup roller 150 remain on state to the feeding box 400 direction application of forces.

In getting the paper process, transmission gear 110 can be subjected to the power from gear cluster 500, and makes clickwise, drives idle gear 120 in regular turn, gets paper gear 140 and pickup roller 150, makes pickup roller 150 make clickwise towards paper feed direction 440; Because pickup roller 150 is movably, and be pivot in the degree of freedom splendid " four-bar linkage ", when therefore it rotates, the moment that produces can make it bestow the paper 430 of positive force the superiors in feeding box 400, and this positive force can increase gradually, till 430 beginnings of the superiors' paper are moved towards paper feed direction 440.In other words, because the size of this positive force can comprise weight, density or stiffness variation along with paper property, so can get the size of paper strength at different paper characteristic automatic compensation, multi-paper feed or problem that can't paper feed can not take place.

Moreover, the position that is provided with of mentioning propulsion source in the prior art is between pickup roller and paper-feeding roller, just propulsion source is positioned on the paper feed direction, but the design of known technology, with present embodiment, gear cluster is to transmit power among Fig. 1 and Fig. 2 on the axostylus axostyle 420 of top to drive, and promptly pickup roller is arranged between propulsion source (on the paper feed direction 440) and the transmission gear, make whole gear cluster must use more gear, cause bigger degradation of energy and noise.Comparatively speaking, the transmission gear 110 that present embodiment then will be responsible for driving is arranged between propulsion source and the pickup roller 150, therefore the power transmission distance is shorter, and the number of gears that uses gear cluster 500 is less, and can reduce the degradation of energy that noise and power transmission cause.

In addition, second connecting rod 170 in the present embodiment is omissible in reality, because transmission gear 110 is that clickwise is (as Fig. 3 when getting paper, but second connecting rod 170 is omitted), first connecting rod 160 is subjected to the drive of friction force, also can produce the inertia of a clickwise, thereby allows idle gear 120 that the inertia of deflection paper 430 directions is arranged, can allow idle gear 120 when getting paper, keep and get paper gear 140 be in engagement, and the positive force of compressing paper 430 is provided; Therefore, even without the binding of second connecting rod 170, still can provide the identical paper function of getting.

Below, see also Fig. 5 to Fig. 7, second preferred embodiment of the present utility model provides the paper-fetching mechanism 200 of another kind of extension, itself and the topmost difference of a last embodiment, be to have set up on the first connecting rod 230 between one gear 240 between idle gear 220 and transmission gear 210, and mesh idle gear 220 and transmission gear 210 respectively.This design helps the number of paper extendibility of feeding box 600, because the length of first connecting rod 230 increases relatively, also the phase strain is big to make the action radius of pickup roller 250, and is contained the whole feeding box 600 of broad.Certainly, the similar practice also can be used in the idle gear on the second connecting rod and gets between the paper gear.

Aforesaid two embodiment are that the feeding box with vertical type is an example, and in fact, the utility model is equally applicable to horizontal feeding box.See also Fig. 8, because the utility model is essentially one " four-bar linkage ", therefore in getting the paper process, the gravity of paper-fetching mechanism 300 is not the key factor of influence running, and same mechanism is suitable equally on horizontal feeding box 700.

The above person is preferred embodiment of the present utility model only, is not in order to limit protection domain of the present utility model; Any those skilled in the art not breaking away from equivalent variations and the modification of being done under spirit of the present utility model and the scope, should be covered by in the protection domain of the present utility model.

Claims

1. paper-fetching mechanism is arranged at a side of a feeding box, it is characterized in that, it comprises that a transmission gear, an idle gear, a swing arm, get a paper gear and a pickup roller, and wherein this transmission gear has a fixing axle center, and connects a propulsion source indirectly; This idle gear and the engagement of this transmission gear, the axle center of its axle center and this transmission gear links with a first connecting rod; This swing arm has a fixed end and a swinging end, and serves as axle rotation with this fixed end; This gets the swinging end that the paper gear is positioned at this swing arm, and keeps engagement with this idle gear; And this pickup roller is got the coaxial setting of paper gear with this.

2. paper-fetching mechanism as claimed in claim 1 is characterized in that, this transmission gear is between this pickup roller and this propulsion source.

3. paper-fetching mechanism as claimed in claim 1 is characterized in that, this gets the axle center of paper gear and the axle center of this idle gear links by a second connecting rod, makes the two keep engagement.

4. paper-fetching mechanism as claimed in claim 1 is characterized in that, is provided with a gear between this idle gear and this transmission gear, respectively with idle gear and transmission gear engagement.

5. paper-fetching mechanism as claimed in claim 4 is characterized in that this gear is hubbed on this first connecting rod.

6. paper-fetching mechanism as claimed in claim 1 is characterized in that, this idle gear and get and be provided with a gear between the paper gear is got the paper gear mesh with this idle gear and this respectively.

7. paper-fetching mechanism as claimed in claim 6 is characterized in that this gear is hubbed on this second connecting rod.

8. paper-fetching mechanism as claimed in claim 1 is characterized in that this transmission gear is arranged at the inner side edge of this feeding box.

9. paper-fetching mechanism as claimed in claim 1 is characterized in that, this transmission gear is arranged on the jack-post of this feeding box inner side edge.

10. paper-fetching mechanism as claimed in claim 1 is characterized in that, this transmission gear articulates mutually with a gear cluster that is arranged at this feeding box outside, and this this propulsion source of gear cluster direct connection.

11. paper-fetching mechanism as claimed in claim 1 is characterized in that, the fixed end of this swing arm has a hollow and connects post.

12. paper-fetching mechanism as claimed in claim 1 is characterized in that, the fixed end of this swing arm is articulated in the axostylus axostyle of extension from this feeding box madial wall.

13. paper-fetching mechanism as claimed in claim 1 is characterized in that, the swinging end both sides of this swing arm are extended one first contact pin and one second contact pin respectively.

14. paper-fetching mechanism as claimed in claim 13 is characterized in that, this gets the outside that the paper gear is arranged at this first contact pin.

15. paper-fetching mechanism as claimed in claim 13 is characterized in that, this pickup roller is arranged between this first contact pin and second contact pin.

16. paper-fetching mechanism as claimed in claim 1 is characterized in that, this feeding box is a vertical type feeding box.

17. paper-fetching mechanism as claimed in claim 1 is characterized in that, this feeding box is a horizontal feeding box.