CN100396496C - Point-and-raw type printer - Google Patents
Point-and-raw type printer Download PDFInfo
- Publication number
- CN100396496C CN100396496C CNB2006100054825A CN200610005482A CN100396496C CN 100396496 C CN100396496 C CN 100396496C CN B2006100054825 A CNB2006100054825 A CN B2006100054825A CN 200610005482 A CN200610005482 A CN 200610005482A CN 100396496 C CN100396496 C CN 100396496C
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- air roll
- described air
- attack
- point
- block
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Abstract
The present invention enables the shift of a platen striking face position to be accurately performed in a dot line printer which has a platen with a circular arc-like shape and can not use the circular-arc core as a rotary shaft of platen pivot. The platen performs the positioning in a fore- and aft-direction by pressing against a block with cross section of the shape of a circular arc centered on the circular arc core of the platen while performing the positioning in an up and downward direction by pressing downward with a spring force generating means.
Description
Technical field
The present invention relates to point-and-raw type printer, relate in particular to paper advance mechanism portion.
Background technology
Fig. 7 and Fig. 8 represent the concise and to the point formation of a portion of example typewriting mechanism of point-and-raw type printer.Word hammer group 1 (for example, with reference to patent documentation 1) with a plurality of word hammers 10 is by not shown shuttle mechanism portion, at horizontal (arrow A direction among the figure) back and forth movement.In addition, word hammer group 1, with colour band 2 and the printing paper 3 that moves to the direction of arrow C in sandwich, with the air roll 25 opposed state configuration of supporting typewriting power, under the state that comes and goes mobile word hammer group 1, drive word hammer 10 every appropriate time, just with form printing character, figure etc. on printing paper 3 of dot matrix.Printing paper 3 in the typewriting process, by carrying the paper advance mechanism portion 6 of hauling machine 4, paper pushing motor 7, transmits to vertical direction in good time.Hauling machine 4 by send into the embedded dowel pin in hole on the two ends that are configured in printing paper 3 continuously, transmits printing paper 3.
If air roll 25 is accepted strike number (tens million of times) to a certain degree, just the hitting power because of word hammer 10 forms negative area on air roll 25 surfaces.If form this negative area, just can not reliably catch the hitting power of word hammer 10 with the scope of attack of air roll 25, be created in that hitting power reduces on the printing paper, lettering concentration print quality problem such as shoal.In addition, if word hammer 10 is nipped at negative area, the colour band 2 that moves between word hammer group 1 and air roll 25 pulls word hammer 10, can cause colour band 2 breakages.
The example that Fig. 9 is expressed as the air roll that addresses the above problem and propose constitutes.Fig. 9 is the profile with point-and-raw type printer of air roll 30 cylindraceous.Air roll 30 is rotatably supported its two ends by bearing, by driving mechanism (not shown), carries out small rotation to the D direction off and on synchronously with paper feeding, and the circumferencial direction to air roll 30 changes typewriting power support sector successively.Thus, avoid accepting the strike of word hammer 10, obtain the sufficient durability of air roll 30 in the same part of air roll 30.But rotary air roll 30 cylindraceous can be by constituting that driving such as stepper motor are rotated owing to form, so the cost height.In addition, be subjected to the restriction on the typewriting characteristic of word hammer 10, the amount of deflection of straightness of air roll 30 (the straight degree of axle of air roll) and accompanying rotation (the off normal amount of the periphery track when axle center rotation air roll) in whole typewriting scope, needs the high accuracy of 20 μ m degree.Owing to obtain this high-precision processing difficulties, so cause the cost of air roll 30 itself very high.
Figure 10 represents to constitute for an example that addresses the above problem the air roll that proposes in addition.In this example, because high price is made air roll and peripheral part thereof, so on the air roll 25 that adopts vulcanie 25a as typewriting support sector, engage the air roll plug 28 of cuboid.For preventing above-mentioned typewriting quality problems, the problems such as breakage of colour band, on this fixed air roll 25, form the cross sectional shape of air roll circular-arc, after the 1st scope of attack deterioration of air roll, with Pb is fulcrum, press the curvature R rotation air roll 25 of air roll, be substituted into the 2nd later scope of attack of air roll 25, prolong the life-span of air roll 25 by the position.
Figure 11 represents to replace the concise and to the point formation of portion of mechanism of the scope of attack of air roll 25.Air roll 25, its two ends are installed on the air roll frame 21 freely via air roll supporter 24 rotations of L type.Be located at the rotary middle spindle 23 on the air roll supporter 24, with the center of the circular arc R of air roll 25 as one man, be entrenched in the hole that is located on the air roll frame 21.By rotating bottom surface and air roll frame 21 butts that are assembled in a pair of block 22 on the air roll plug freely, the location is with respect to the diagram above-below direction of the air roll 25 of air roll frame 21.In this butt area E, the face of the bottom surface of block 22 and air roll frame 21 forms the inclined plane, by rotary block above-below direction motion air roll 25 in figure.Thus, air roll 25 rotates by the curvature of circular arc R, carries out the position of the scope of attack of air roll and replaces.
Patent documentation 1: the spy opens flat 7-137371 communique
In nearest point-and-raw type printer, except that the typewriting quality, also require the easiness that keeps.Therefore, possess air roll with the right angle orientation of printing paper carry out on-off action mechanism's (air roll switching mechanism) become main flow.
Figure 12 is the concise and to the point side view of the air roll switching mechanism that is made of the cam that is used for the air roll on-off action, motor etc. in the behind of air roll.In Figure 12, the eccentric cam 27 that formation is connected with motor 29 and the end butt of the plug 28 of air roll 25, by the rotation of eccentric cam 27, air roll 25 formation that the F direction moves in figure.
Printer as constituted above, if organizing 1 an opposed side with the word hammer air roll switching mechanism be set at air roll 25, just have to respectively with the width that increases the printer framework guaranteeing the space of air roll switching mechanism of packing into, or the length that shortens air roll seeks to save the space correspondence.Even it is also uneconomical aspect cost to strengthen framework, so not preferred.Therefore, only reduce the method for the size of air roll.But, if shorten the length of air roll, promptly shorten the air roll 25 of F direction of Figure 12 and plug 28 and add together length, just can not determine the rotating shaft that the Pb of center of arc of air roll rotates as air roll in the air roll frame, the positioning accuracy of air roll reduces.
The center of arc that prolongs air roll in addition,, also proposes to prolong the center of arc of air roll, if but just can not determine the center of arc of air roll, the positioning accuracy reduction of air roll in the air roll frame so that the scope of attack of word hammer 1 is a purpose near the plane as far as possible.
Summary of the invention
For this reason, the object of the present invention is to provide a kind of point-and-raw type printer that can the center of arc of air roll be used as the rotating shaft of air roll rotation, can carry out the position of the air roll scope of attack accurately and replace.
For addressing the above problem, in the 1st invention of the present invention, a kind of point-and-raw type printer is provided, shuttle mechanism, the paper advance mechanism that transmits printing paper that possess the word hammer group of carrying a plurality of words hammers, this word hammer group is come and gone move, support that the scope of attack of the typewriting power of described word hammer is circular-arc air roll, between described word hammer and described air roll, dispose colour band, in the process of the back and forth movement of described word hammer group, drive described word hammer in good time, typewrite, it is characterized in that: be provided with the air roll base that keeps described air roll; In the vertical direction is pushed the elastic mechanism of described air roll; Have stair-stepping abutting part and this abutting part and have a plurality of butts zone that contacts with the interface of described air roll base side, adjust the block of described air roll with respect to the position of described air roll base by replacing above-mentioned butt zone.
The 2nd invention of the present invention, be as the described point-and-raw type printer of the 1st invention, it is characterized in that: hole portion is set near the interface of described air roll base, after the 1st scope of attack deterioration of described air roll, rotate described block and replace the butt zone that contacts with described interface in the abutting part of described block, and a part that makes the abutting part of described block inserts in the portion of described hole, thereby replace the position of carrying out the described air roll scope of attack
The 3rd invention of the present invention is that it is characterized in that: the cross sectional shape of the bearing surface of described air roll base and described air roll and the circular shape of described air roll are roughly the same as the described point-and-raw type printer of the 1st or the 2nd invention.
The 4th invention of the present invention, be as the described point-and-raw type printer of the 1st or the 2nd invention, it is characterized in that: the cross sectional shape of the bearing surface of described air roll base and described air roll is to have the polyhedron that changes the face number of number of times equal number with the scope of attack of described air roll.
The 5th invention of the present invention is as the described point-and-raw type printer of the 1st～the 2nd invention, it is characterized in that: be provided with manually to insert with knob or coin on described block and use groove.
As mentioned above, in the present invention, it is characterized in that:, can carry out the position of the air roll scope of attack and replace by rotating the air roll block that air roll scope of attack above-below direction is moved.In addition, it is characterized in that: even when the air roll on-off action of the variable in distance of described printing paper and described air roll, also can remain on the degree of not changeing naturally by snap close piece.
According to the present invention, provide a kind of and can not use the point-and-raw type printer of the center of arc of air roll as rotating shaft, can high accuracy, the position of easily carrying out the air roll scope of attack replaces.
Description of drawings
Fig. 1 is near the concise and to the point side view (partial sectional view) of the formation of the portion of printing mechanism of expression point-and-raw type printer of the present invention.
Fig. 2 is the A-A ' cutaway view of Fig. 1.
Fig. 3 is the concise and to the point side view (partial sectional view) of the formation of expression typewriting of the present invention support sector integral body.
Fig. 4 is the key diagram of the state of the position of expression air roll when replacing.
Fig. 5 is front view, vertical view and the side view of the formation of expression block.
Fig. 6 is the vertical view that expression is formed on the hole portion on the air roll base.
Fig. 7 is the concise and to the point stereogram that the integral body of expression point-and-raw type printer constitutes.
Fig. 8 is a concise and to the point side view of representing the formation of point-and-raw type printer in the past.
Fig. 9 is a concise and to the point side view of representing the formation of point-and-raw type printer in the past.
Figure 10 represents the concise and to the point side view of the formation of point-and-raw type printer in the past.
Figure 11 is the concise and to the point vertical view of portion of mechanism of replacing the scope of attack of air roll.
Figure 12 is the concise and to the point side view of air roll switching mechanism.
Figure 13 is the concise and to the point side view (partial sectional view) of formation of the typewriting support sector of expression another example of the present invention.
Among the figure: 1-word hammer group, 2-colour band, 3-printing paper, 4-hauling machine, 5-air roll, 10-word hammer, 11-air roll base, 12-paper feeding tie rod, 13-ring spring, 14-block, 15-spring, 16-air roll box, the 17-eccentric cam, 18-leaf spring, 21-air roll frame, 22-block, 23-air roll rotating shaft.
The specific embodiment
Below, with reference to description of drawings the present invention.
Fig. 1 is near the right side view (partial sectional view) of the formation of the air roll of expression point-and-raw type printer.Fig. 2 is a diagram of seeing the A-A ' section of Fig. 1 from the G direction.The air roll 5 that has circular-arc cross sectional shape and be made of vulcanie part 5a and mandrel segment 8 is configured in the word hammer and organizes on the 1 opposed position.The fore-and-aft direction of air roll 5 (H direction) positions by contacting with the air roll base 11 of L font with the tension force that is installed in the stretching ring spring 13 on the tie rod 12 of air roll 5 and paper feeding.Air roll base 11 is configured near the two ends, the left and right sides of air roll 5, and has and be the cross section of the roughly the same circular shape of the air roll 5 of radius centered r with the Pa of center of arc of air roll 5.
In addition, the above-below direction of air roll 5 (I direction), be assembled in the bottom surface 14a～14c of a pair of block 14 on the air roll plug 8 and the interface 11a butt of air roll base 11 freely by rotating, push air roll 5 from the top of air roll 5, to position by spring 15.
Fig. 5 represents the shape (front view, vertical view, right side view) as the block 14 of an example of the position replacement mechanism of air roll 5 scopes of attack.With the abutting part spiral step shape of the block 14 of the interface 11a butt of air roll base 11 3 layers of ladder (14a～14c) is set.In addition, as shown in Figure 2, near the interface 11a of the air roll base 11 of block 14 butts, as shown in Figure 6, a pair of roughly circular-arc 11b of hole portion is set.Thus, when rotary block 14 made the bearing surface 14a of block 14 depart from the interface 11a of air roll base 11, the bearing surface 14a that forms block 14 entered the 11b of hole portion of air roll base 11 and does not hinder the mobile formation of air roll 5 downwards.
In addition, by jut 14e is set, be entrenched in groove 11c on this jut 14e as shown in Figure 6 on block 14, can keep block 14 with the degree of not rotating naturally in the 11 side settings of air roll base.In addition, by hand rotation on block 14 rotation is set and inserts with groove (14d), can carry out the position of the scope of attack of air roll 5 easily and replace with knob or coin.
Each state when then, Fig. 4 represents to replace the scope of attack of air roll.Now, as shown in Figure 5 since block 14 and abutting part air roll base 11 be 3 layers stepped, therefore switch the scope of attack of air rolls in this example for 2 times.
At first, utilize the 1st scope of attack (lower area of air roll 5) of air roll to print (state of (1)).At this moment, on the interface 11a of air roll base 11, the abutting part 14a of butt block 14.The printing of stipulating, when the 1st scope of attack of air roll 5 reaches the life-span, if to the J direction rotary block 14 shown in Fig. 4 (1), the abutting part 14b of block 14 just is connected on the interface 11a of air roll base 11, and the abutting part 14a of block 14 enters the 11b of hole portion of air roll base 11 simultaneously.Thus, air roll 5 downward directions (K direction) move (states of (2)).Thus, because the hit position of word hammer 10 and air roll 5 changes at the middle section of air roll 5, so can avoid because of the hitting power of word hammer 10 at the recess that the scope of attack of air roll 5 forms, can not exchange air roll 5 ground and use the 2nd scope of attack as new product, continue printing.In addition, replace position to the 3rd scope of attack (upper area of air roll) of air roll 5, same as the above-mentioned method, by again to the J direction rotary block 14 shown in Fig. 4 (2), the abutting part 14c of block 14 is connected on the interface 11a of air roll base 11, the abutting part 14a of while block 14 and the 11b of hole portion that 14b enters air roll base 11, formation can be used the state (states of (3)) of the 3rd scope of attack.
Fig. 3 is the concise and to the point formation of the typewriting support sector integral body of expression assembling air roll formation of the present invention and air roll switching mechanism.
The spring 15 that pushes air roll 5 from the top is fixed on the air roll box 16 of " コ " shape of taking in air roll 5, air roll base 11.Air roll box 16 is pushed downwards from the top by leaf spring 18, and is restrained at above-below direction.In addition, the screw of direction platen roller box 16 (not shown) is fixed on framework etc. up and down.In addition, air roll box 16 contacts with eccentric cam 17 by the tension force of stretching ring spring 13.Eccentric cam 17 itself is configured near the two ends, the left and right sides of air roll box 16, becomes the location benchmark of air roll 5.By making eccentric cam 17 in rotating shaft center's rotation, can air roll 5 be moved forward and backward, can carry out the on-off action of so-called air roll 5.By with the not shown motor that can control rotation amount, the rotating shaft of eccentric cam 17 and not shown synchronous band are linked, also can carry out the switching of air roll 5 according to the rotation amount of motor.
Then, illustrate in greater detail the strike relation of plane of word hammer 10 and air roll 5.
The amount of spin of the air roll 5 that forms is replaced in the position of the scope of attack, need be to reach the amount that the scope of attack of the air roll 5 in life-span does not superpose.In this example, install by a plurality of word hammer groups 1 that constitute at interval by 1/180 inch.When paper feeding direction 12 row transposition ground installation words hammer 10 into shape, the interval of the 1st pin and the 12nd pin is approximately 1.6mm.In the diameter of phi D=0.2mm of word hammer 10, the strike width of word hammer 10 is approximately 1.8mm, does not replace because of the position of the scope of attack for the scope of attack of air roll 5 to superpose, and the above-below direction amount of movement of air roll 5 need be more than 1.8mm.When the curvature R of air roll 5 is 40mm, for the scope of attack that makes air roll 5 move 1.8mm+ surplus capacity δ (be defined as δ=0.6mm) in the present invention, on calculating as long as about 3.5 degree inclination air rolls 5 are just passable.Therefore, the shape of the abutting part of block 14, be preferably in abutting part 14a that uses in the 1st air roll scope of attack support and the abutting part block 14b that in the 2nd air roll scope of attack support, uses between be provided with 3.5 the degree inclinations.Even on the 2nd later scope of attack,, also a plurality of scopes of attack can be set between the abutting part corresponding with each scope of attack by the inclinations of 3.5 degree are set.
In addition, in the present invention, the center of arc that the cross sectional shape of air roll base 11 is set as with air roll 5 is the circular-arc of center, but as shown in figure 13, even the cross sectional shape of air roll base 11 is formed the polyhedron with face number identical with the quantity of the abutting part of block 14, also can carry out the scope of attack position of air roll 5 accurately and replace.
Claims (5)
1. point-and-raw type printer, transmits the paper advance mechanism of printing paper and supports that the scope of attack of the typewriting power of described word hammer is circular-arc air roll the shuttle mechanism that possess the word hammer group of carrying a plurality of words hammers, this word hammer group is come and gone move,
Between described word hammer and described air roll, dispose colour band, in described word hammer group back and forth movement process, drive described word hammer in good time and typewrite, it is characterized in that:
Also be provided with:
The air roll base, it keeps described air roll,
Elastic mechanism, its in the vertical direction is pushed described air roll,
Block, it has stair-stepping abutting part, and this abutting part has a plurality of butts zone that contacts with the interface of described air roll base side, adjusts the position of described air roll with respect to described air roll base by replacing above-mentioned butt zone.
2. point-and-raw type printer as claimed in claim 1, it is characterized in that: porose portion is set near the interface of described air roll base, after the 1st scope of attack deterioration of described air roll, rotate described block and replace the butt zone that contacts with described interface in the abutting part of described block, and a part that makes the abutting part of described block inserts in the portion of described hole, thereby replace the position of carrying out the described air roll scope of attack.
3. point-and-raw type printer as claimed in claim 1 or 2 is characterized in that: the cross sectional shape of described air roll base and bearing surface described air roll butt, and roughly the same with the circular shape of described air roll.
4. point-and-raw type printer as claimed in claim 1 or 2, it is characterized in that: the cross sectional shape with bearing surface described air roll butt described air roll base is a polyhedron, and the face number that this polyhedron had is identical with the scope of attack of described air roll change number of times.
5. point-and-raw type printer as claimed in claim 1 or 2 is characterized in that: described block is provided with manually to insert with knob or coin uses groove.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005014238 | 2005-01-21 | ||
| JP2005014238 | 2005-01-21 | ||
| JP2005275371 | 2005-09-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1807102A CN1807102A (en) | 2006-07-26 |
| CN100396496C true CN100396496C (en) | 2008-06-25 |
Family
ID=36839265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100054825A Expired - Fee Related CN100396496C (en) | 2005-01-21 | 2006-01-12 | Point-and-raw type printer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100396496C (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3144821A (en) * | 1960-10-06 | 1964-08-18 | Ibm | Printer apparatus having print force control |
| JPH07137371A (en) * | 1993-11-19 | 1995-05-30 | Hitachi Koki Co Ltd | Dot printer |
| US5787803A (en) * | 1996-11-08 | 1998-08-04 | Hitachi Koki Co., Ltd. | Dot line printer with mimimum hammer gap arrangement |
| CN1498766A (en) * | 2002-11-06 | 2004-05-26 | 日立印刷技术株式会社 | Dot-matrix printer |
-
2006
- 2006-01-12 CN CNB2006100054825A patent/CN100396496C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3144821A (en) * | 1960-10-06 | 1964-08-18 | Ibm | Printer apparatus having print force control |
| JPH07137371A (en) * | 1993-11-19 | 1995-05-30 | Hitachi Koki Co Ltd | Dot printer |
| US5787803A (en) * | 1996-11-08 | 1998-08-04 | Hitachi Koki Co., Ltd. | Dot line printer with mimimum hammer gap arrangement |
| CN1498766A (en) * | 2002-11-06 | 2004-05-26 | 日立印刷技术株式会社 | Dot-matrix printer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1807102A (en) | 2006-07-26 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: RICOH CO. LTD. Free format text: FORMER OWNER: RICOH PRINTING SYSTEMS LTD. Effective date: 20130508 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130508 Address after: Tokyo, Japan Patentee after: Ricoh Co., Ltd. Address before: Tokyo, Japan, Japan Patentee before: Ricoh Printing Systems Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080625 Termination date: 20200112 |
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| CF01 | Termination of patent right due to non-payment of annual fee |