CN1496851A - Supply roller bearing support for ink-jet printer - Google Patents

Abstract

A feeding roller shaft supporter for an ink-jet printer having a feeding roller shaft, including a main chassis which forms a frame of an ink-jet printer; a first supporting unit in the main chassis supporting opposite ends of the feeding roller shaft; a driving member provided at a first end of the feeding roller shaft; an axial position correction unit mounted on the feeding roller shaft close to the driving member, correcting an axial position of the feeding roller shaft; and a second supporting unit supporting the feeding roller shaft, wherein the second supporting unit is provided on a second end of the feeding roller shaft, preventing the shaking of the feeding roller shaft caused by thrust when the feeding roller shaft rotates.

Description

The supply roller bearing support that is used for ink-jet printer

Technical field

The present invention relates to a kind of ink-jet printer, especially relate to the supply roller bearing support that is used for ink-jet printer, the supply roll shaft that this supply roller bearing support is used for supplying with printing paper can be rotated to support on ink-jet printer.

Background technology

The supply roll shaft that is used for ink-jet printer will be loaded on the printing paper of sheet feed stacker and supply with in the imaging moiety that is arranged in the printer.When printer driver, this donor rollers pipe spreader receives from the electric power of independent power supply and rotates.In this case, can not obtain suitable printing effect usually, because will produce print deformation when roll shaft produces vibration when supplying with.Therefore, when design and formation supply roller bearing support, need consider implementation issue.And, when the resolution ratio of ink-jet printer increases, even tiny vibration also can produce adverse effect to print result.Therefore, need conscientiously design supplying with roll shaft.

Fig. 1 and 2 has schematically illustrated common supply roller bearing support, wherein, reference number 10 expression main cases, roll shaft is supplied with in 20 expressions, and 30 expressions keep the station.

As illustrated in fig. 1 and 2, main case 10 provides first to the 3rd static element 11,12 and 13, and wherein, this first and second static element is distinguished the opposite end of rotatably mounted supply roll shaft 20 by comprising first bearing unit 21 of first and second linings.In addition, retaining part 30 is installed between the second and the 3rd static element 12 and 13.

An end of supplying with roll shaft 20 is furnished with driven wheel 22, and axial location correcting unit 23 is arranged near driven wheel 22, so that proofread and correct its axial location when supplying with roll shaft 20 rotations.This axial location correcting unit 23 comprises: spring anchoring ring 23a, this spring anchoring ring 23a are installed in the position that the location interval of supplying with roll shaft 20 of linking to each other with driven wheel 22 is opened; Spring shim 23b, this spring shim 23b connect into the first sleeve 21a and contact; And spring 23c, this spring 23c is installed between anchoring ring 23a and the spring shim 23b.This anchoring ring 23a connects into and makes spring 23c by this anchoring ring 23a compression.

When ink-jet printer drives, when supplying with roll shaft 20 and rotate, paper is sent in the imaging moiety that is arranged in the ink-jet printer by the supply roll shaft 20 of the rotatable supporting of above-mentioned supply roller bearing support by the driving force of supplying with by driven wheel 22.

But, the supply roller bearing support of common ink-jet printer has such problem: pass through first and second static elements 11 and 12 at the opposite end simple support because supply with roll shaft 20, therefore the feasible roll shaft 20 of supplying with of the thrust that produces when 20 rotations of supply roll shaft vibrates.In addition, the donor rollers support also has such problem: the precision of gear provides the reason of supplying with roll shaft 20 vibrations in addition, because driven wheel 22 closely contacts with first bearing unit 21, it is positioned near first bearing unit 21.When supplying with the such axial vibration of roll shaft, will cause print deformation, therefore will be difficult to carry out high density printing.Therefore, need prevent the axial vibration of the supply roll shaft that when supplying with the roll shaft rotation, causes by thrust.

Summary of the invention

Therefore, the present invention is used to solve above-mentioned and/or other problem in the prior art, one aspect of the present invention provides a kind of supply roller bearing support that is used for ink-jet printer, it can make the user obtain to have suitable high-resolution print result by preventing the axial vibration of supplying with roll shaft when when rotation axle, therefore can avoid occurring the distortion that occurs by in the donor rollers shaft vibration process that cause, that print on paper.

Others of the present invention and/or advantage part will illustrate below that part will be understood by this explanation, perhaps can know by carrying out an invention.

To realize above-mentioned and/or others in order solving, according to the present invention, to provide a kind of supply roller bearing support that is used to have the ink-jet printer of supplying with roll shaft, it comprises: main case, and this main case forms the framework of ink-jet printer; First bearing unit, this first bearing unit is in main case, and it supports the opposite end of this supply roll shaft; Driver part, this driver part are arranged in first end of supplying with roll shaft; The axial location correcting unit, this axial location correcting unit is being installed near the driver part place on the supply roll shaft, and proofreaies and correct the axial location of supplying with roll shaft; And second bearing unit, roll shaft is supplied with in this second bearing unit supporting, and wherein, this second bearing unit is arranged in second end of this supplys roll shaft, so that prevent the donor rollers shaft vibration that caused by thrust when roll shaft rotates supplying with.

According to embodiments of the invention, first bearing unit can comprise first and second sleeves, and this first and second sleeve lays respectively at the opposite end of supplying with roll shaft.

In addition, supplying with roll shaft first end, can form predetermined space between the driver part and first bearing unit, like this, driver part can not contact with first bearing unit.

Also have, second bearing unit can comprise that around anchoring ring and the pad of supplying with roll shaft centering wherein, this second bearing unit can carry out face with surface first bearing unit, that face toward supply roll shaft first end and contact.

According to another embodiment of the present invention, second bearing unit can comprise the cap body, and this cap body is arranged to away from second end of supplying with roll shaft, and this cap body and the fixed body of main case inboard carry out contacting.

According to an also embodiment of the present invention, second bearing unit can comprise: cap body, this cap body are arranged in second end of supplying with roll shaft; And cap body support unit, this cap body and this cap body support unit carry out contacting, wherein, this cap body support unit is installed on the main case with screw connecting mode or is installed on the fixed body of main case inboard, so that can regulate the elongation degree of cap body support unit.

Description of drawings

By below in conjunction with the accompanying drawing description of a preferred embodiment, these and/or others and advantage can be clearer of the present invention, in the accompanying drawing:

Fig. 1 is the perspective view that schematically illustrates the common supply roller bearing support that is used for ink-jet printer;

Fig. 2 is the cutaway view of supply roller bearing support shown in Figure 1;

Fig. 3 is expression is used for the supply roller bearing support of ink-jet printer according to the preferred embodiment of the present invention the decomposition diagram of major part;

Fig. 4 is the cutaway view of the confined state of the supply roller bearing support shown in the presentation graphs 3;

Fig. 5 is the perspective view of the state of expression when supplying with the embodiment of the invention of roll shaft by supply roller bearing support shown in Figure 3 and being installed in the printer;

Fig. 6 is the decomposition diagram of major part of representing to be used for according to another embodiment of the present invention the supply roller bearing support of ink-jet printer;

Fig. 7 is the cutaway view of the confined state of the supply roller bearing support shown in the presentation graphs 6;

Fig. 8 is the decomposition diagram of the major part of an expression also embodiment according to the present invention supply roller bearing support that is used for ink-jet printer;

Fig. 9 is the cutaway view of the confined state of the supply roller bearing support shown in the presentation graphs 8; And

Figure 10 is the perspective view that the state of roll shaft when also the supply roller bearing support of an embodiment is installed in the printer according to the present invention supplied with in expression.

The specific embodiment

To introduce the preferred embodiments of the present invention in detail below, the example table of the preferred embodiment is shown in the drawings, and in the accompanying drawings, identical reference number is represented components identical.To introduce embodiment by accompanying drawing below, so that explanation the present invention.

With reference to figure 3 to 5, reference number 10 expression main cases, roll shaft is supplied with in 20 expressions, 21 expressions, first bearing unit, 21a and 21b represent first and second sleeves respectively, 30 expressions keep the station, 40 expressions, second bearing unit.

Fig. 3 to 5 has represented embodiments of the invention, and wherein, main case 10 provides first to the 3rd static element 11,12 and 13, and they are separated from each other.

Supplying with roll shaft 20 is supported by first and second static elements 11 and 12 by first bearing unit 21 in its opposite end.And, driven wheel 22 and the end engagement of supplying with roll shaft 20, wherein, this driven wheel 22 is powered by unshowned power supply.This driven wheel end of engagement provides axial location correcting unit 23, proofreaies and correct the axial location of supplying with roll shaft 20 when rotating with convenient donor rollers axle 20.

First bearing unit 21 comprises: the first sleeve 21a, and the driven wheel end of engagement of roll shaft 20 is supplied with in this first sleeve 21a supporting; And the second sleeve 21b, the other end of roll shaft 20 is supplied with in this second sleeve 21b supporting.

Shaft position correcting unit 23 comprises: spring anchoring ring 23a, this spring anchoring ring 23a are installed in and driven wheel 22 and supply roll shaft 20 position engaged spaced positions places; Spring shim 23b, this spring shim 23b connect into the first sleeve 21a and contact; And spring 23c, this spring 23c is installed between anchoring ring 23a and the spring shim 23b.This anchoring ring 23a connects into and makes spring 23c by this anchoring ring 23a compression.

Keep station 30 to be installed between the second and the 3rd static element 12 and 13.

Second bearing unit supply with roll shaft 20, the end relative with axial location correcting unit 23 support this supplys roll shaft 20, so that prevent that this supply roll shaft is owing to thrust is vibrated when supply roll shaft 20 rotates.Second bearing unit 40 comprises anchoring ring 41 and pad 42, and is installed on the supply roll shaft 20.Like this, anchoring ring 41 and pad 42 are mounted to and carry out face with this second sleeve 21b contact on the inner surface of the second sleeve 21b, thereby the axially mounting point of the roll shaft 20 of increasing supply like this, can prevent the vibration of this supply roll shaft when supplying with the roll shaft rotation.

Simultaneously, supply roller bearing support comprises and is formed at gap g between the driven wheel 22 and the first sleeve 21a, that have preliminary dimension, as shown in Figure 4.Therefore, the driven wheel 22 and the first gear 21a do not contact with each other, thereby can eliminate one and make the reason of supplying with roll shaft 20 axial vibrations, promptly cause 20 axial vibrations of supply roll shaft by the contact between the driven wheel 22 and the first sleeve 21a owing to the accuracy error of driven wheel 22.

Fig. 6 to 10 has represented two other embodiment of the present invention, wherein, and reference number 10 expression main cases, roll shaft is supplied with in 20 expressions, 21 expressions, first bearing unit, and 21a and 21b represent first and second sleeves respectively, 30 expressions keep the station, 50 expressions, second bearing unit.

Main case 10 provides first to the 3rd static element 11,12 and 13, and they are separated from each other.

Supplying with roll shaft 20 is supported by first and second static elements 11 and 12 by first bearing unit 21 in its opposite end.And, driven wheel 22 and the end engagement of supplying with roll shaft 20, wherein, this driven wheel 22 is by the power supply that receives not shown power supply.This driven wheel end of engagement provides axial location correcting unit 23, proofreaies and correct the axial location of supplying with roll shaft 20 when rotating with convenient donor rollers axle 20.

First bearing unit 21 comprises: the first sleeve 21a, and the driven wheel end of engagement of roll shaft 20 is supplied with in this first sleeve 21a supporting; And the second sleeve 21b, the other end of roll shaft 20 is supplied with in this second sleeve 21b supporting.

Shaft position correcting unit 23 comprises: spring anchoring ring 23a, this spring anchoring ring 23a are installed in and driven wheel 22 and supply roll shaft 20 position engaged spaced positions places; Spring shim 23b, this spring shim 23b connect into the first sleeve 21a and contact; And spring 23c, this spring 23c is installed between anchoring ring 23a and the spring shim 23b.This anchoring ring 23a connects into and makes spring 23c by this anchoring ring 23a compression.

Keep station 30 to be installed between the second and the 3rd static element 12 and 13.

Shown in Fig. 6 to 8, according to another embodiment of the present invention, second bearing unit 50 comprises: cap body 51, and this cap body 51 inserts the end of supplying with roll shaft 20, and provides rounded outer surface; And cap body support unit 52, this cap body support unit 52 links to each other with the sidewall that keeps station 30 with the screw ways of connecting.The rounded outer surface that cap body 51 is arranged to make it and cap body support unit 52 carry out contacting.

Because above-mentioned second bearing unit 50 has increased the axially mounting parts of supplying with roll shaft 20, therefore when supplying with roll shaft 20 rotations, can prevent the donor rollers shaft vibration.

And also the bearing unit 50 of an embodiment can only be made of cap body 51 according to the present invention, as shown in Figures 9 and 10.Like this, the rounded outer surface of cap body 51 directly carries out contacting with 30 the side surface of keeping standing.Therefore, in the present embodiment, the supporting-point of donor rollers also increases, thereby can obtain and previous embodiment identical functions effect.

But, by make bearing unit 50 as described above embodiment constitute by cap body 51 and cap body support unit 52, when preventing the donor rollers shaft vibration, can obtain additional effect.

For example, when adding cap body support unit 52, can remain on the gap g (see figure 4) that forms between the driving shaft 22 and the first sleeve 21a more efficiently than initial described embodiment, like this, the driven wheel 22 and the first sleeve 21a can not be in direct contact with one another.Particularly, suitable maintenance gap g is very favourable, because when these parts directly contact, since the crooked and skew on the plane of the driven wheel 22 and the first sleeve 21a, the vibration of the roller of may increasing supply.When providing cap body support unit 52, and this cap body support unit can keep and/or regulate this gap g when being assembled on the wall that keeps station 30 with supporting cap body 51 with screw connecting mode by the overhang of regulating cap body support unit 52.

Rotate driving by the supply roll shaft 20 on the rotatably mounted seat of the supply roller bearing support as constituted above main case 10 by the power that transmits by driven wheel 22, so that paper is supplied with in the imaging moiety in printer.Like this, supply with roll shaft 20 and determining that the some place is by 40 supportings of second bearing unit and rotation; It can prevent to supply with the axial vibration of roll shaft.Therefore, can avoid the paper print deformation that causes owing to the axial vibration of supplying with roll shaft, thereby can obtain printing effect by the high density printing machine with desirable resolution ratio.

In the embodiment shown, cap body 51 has rounded outer surface, and carries out a cap body support unit 52 that contacts with this cap body 51 and form flat.But, the present invention is not limited to this structure, and cap body 51 can adopt with cap body support unit 52 can put any other form that contacts each other.For example, the outer surface of cap body 51 can be the cylindricality with flat end surface, and cap body support unit 52 can adopt circle.

In addition, in the above-described embodiments, it is minimum that the frictional force that produces between cap body 51 and cap body support unit 52 can reduce to, because cap body 51 and cap body support unit 52 are arranged to carry out contact, thereby can avoid because frictional force causes the excessive loss of the revolving force of supply roll shaft 20.

As mentioned above, according to these embodiment of the present invention, provide the additional body that is used to support donor rollers axle head head, like this, supporting force can axially impose on the supply roll shaft.Therefore, can avoid the paper print deformation that causes owing to the axial vibration of supplying with roll shaft, thereby can obtain print result by the high density printing machine with required resolution ratio.

And, because supporting between first sleeve of supplying with roll shaft, driven wheel and being used to opens preset space length, therefore can prevent the donor rollers shaft vibration that the accuracy error owing to driven wheel causes, thereby can improve the reliability of products that is generated.

Although represented and several embodiments of the present invention be described, but it will be appreciated by those skilled in the art that without departing from the principles and spirit of the present invention, can change these embodiment, therefore, scope of the present invention is determined by claim and their equivalent.

Claims (24)

1. supply roller bearing support that is used to have the ink-jet printer of supplying with roll shaft comprises:

Main case, this main case forms the framework of ink-jet printer;

First bearing unit, this first bearing unit is in main case, and it supports the opposite end of this supply roll shaft;

Driver part, this driver part are arranged in first end of supplying with roll shaft;

The axial location correcting unit, this axial location correcting unit is being installed near the driver part place on the supply roll shaft, and proofreaies and correct the axial location of supplying with roll shaft; And

Second bearing unit, roll shaft is supplied with in the supporting of this second bearing unit, and wherein, this second bearing unit is arranged in second end of this supplys roll shaft, so that prevent the donor rollers shaft vibration that caused by thrust when roll shaft rotates supplying with.

2. supply roller bearing support according to claim 1, wherein: first bearing unit comprises first and second sleeves, this first and second sleeve lays respectively at the opposite end of supplying with roll shaft.

3. supply roller bearing support according to claim 2, wherein: supplying with roll shaft first end, form predetermined space between the driver part and first bearing unit, like this, driver part can not contact with first bearing unit.

4. supply roller bearing support according to claim 1, wherein: supplying with roll shaft first end, form predetermined space between the driver part and first bearing unit, like this, driver part can not contact with first bearing unit.

5. supply roller bearing support according to claim 1, wherein: second bearing unit comprises around anchoring ring and the pad of supplying with roll shaft centering.

6. supply roller bearing support according to claim 5, wherein: this second bearing unit carries out face with surface first bearing unit, that face toward supply roll shaft first end and contacts.

7. supply roller bearing support according to claim 1, wherein: second bearing unit comprises the cap body, this cap body is arranged to away from second end of supplying with roll shaft, and this cap body and the fixed body of main case inboard carry out contacting.

8. supply roller bearing support according to claim 7, wherein: supplying with roll shaft first end, form predetermined space between the driver part and first bearing unit, like this, driver part can not contact with first bearing unit.

9. supply roller bearing support according to claim 7, wherein: this cap body inserts second end of supplying with roll shaft.

10. supply roller bearing support according to claim 7, wherein: this cap body has rounded outer surface.

11. supply roller bearing support according to claim 7, wherein: the fixed body of main case inboard is to keep the station.

12. supply roller bearing support according to claim 1, wherein: this second bearing unit comprises:

Cap body, this cap body are arranged in second end of supplying with roll shaft; And

Cap body support unit, this cap body and this cap body support unit carry out contacting,

Wherein, this cap body support unit is installed on the main case with screw connecting mode or is installed on the fixed body of main case inboard, so that can regulate the elongation degree of cap body support unit.

13. supply roller bearing support according to claim 12, wherein: supplying with roll shaft first end, form predetermined space between the driver part and first bearing unit, like this, driver part can not contact with first bearing unit.

14. supply roller bearing support according to claim 12, wherein: this cap body has rounded outer surface, and this rounded outer surface and the plane surface of cap body support unit carry out contacting.

15. supply roller bearing support according to claim 12, wherein: this cap body support unit has rounded outer surface, and this rounded outer surface and cap body carry out contacting.

16. a supporting is used for the method for the supply roll shaft of ink-jet printer, so that reduce this with the vibration that the rotation of supplying with roll shaft is carried out, this method comprises:

First bearing unit is provided, and this first bearing unit is in main case, and it supports the opposite end of this supply roll shaft;

The axial location correcting unit is provided, and this axial location correcting unit is on first end of supplying with roll shaft, and close driver part; And

Second bearing unit is provided, and this second bearing unit is at this second end of supplying with roll shaft, and it supports the supply roll shaft vertically.

17. method according to claim 16 is characterized in that, also comprises: supplying with roll shaft first end, form predetermined space between the driver part and first bearing unit, like this, driver part can not contact with first bearing unit.

18. method according to claim 16, wherein: providing second bearing unit to comprise provides anchoring ring and the pad that contacts with first bearing unit.

19. method according to claim 16, wherein: providing second bearing unit to comprise provides the cap body, and this cap body contacts with the fixed body of main case inboard.

20. method according to claim 16, wherein: provide second bearing unit to comprise:

Provide the cap body at second end of supplying with roll shaft; And

Cap body support unit is provided, and this cap body support unit and this cap body carry out contacting,

Wherein, this cap body support unit is installed on the main case with screw connecting mode or is installed on the fixed body of main case inboard, so that can regulate the elongation degree of cap body support unit.

21. a supply roller bearing support that is used to have the ink-jet printer of supplying with roll shaft comprises:

First bearing unit, this first bearing unit radially supports the opposite end of this supply roll shaft;

Driver part, this driver part are arranged in first end of supplying with roll shaft; And

Second bearing unit, this second bearing unit are arranged in second end of supplying with roll shaft, and in axial direction roll shaft is supplied with in supporting, thereby reduce to supply with the axial vibration of roll shaft.

22. supply roller bearing support according to claim 21, wherein: this second bearing unit be arranged to printer in first bearing unit or fixed body carry out contacting, thereby reduce because contact and the frictional influence of the revolving force of supplying with roll shaft.

23. supply roller bearing support according to claim 21 is characterized in that, also comprises: be in predetermined space between the driver part and first bearing unit at first end of supplying with roll shaft.

24. a supply roller bearing support that is used to have the ink-jet printer of supplying with roll shaft comprises:

First bearing unit, this first bearing unit supports the opposite end of this supply roll shaft;

Driver part, this driver part are arranged in first end of supplying with roll shaft; And

Be in predetermined space between the driver part and first bearing unit at first end of supplying with roll shaft, this predetermined space prevents to supply with roll shaft owing to the skew of driver part is vibrated.

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