CN1082930C - Medium detector - Google Patents
Medium detector Download PDFInfo
- Publication number
- CN1082930C CN1082930C CN96108106A CN96108106A CN1082930C CN 1082930 C CN1082930 C CN 1082930C CN 96108106 A CN96108106 A CN 96108106A CN 96108106 A CN96108106 A CN 96108106A CN 1082930 C CN1082930 C CN 1082930C
- Authority
- CN
- China
- Prior art keywords
- light
- prism
- reflecting
- medium
- reflecting surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
- B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
- B65H7/14—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors by photoelectric feelers or detectors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Controlling Sheets Or Webs (AREA)
- Geophysics And Detection Of Objects (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
Abstract
To prevent a prism from being stained and influenced by a disturbance light, by setting a case to surround two reflecting faces of the prism being a reflecting body. The light from a light-emitting element 7, passing through a hole 5 of a transfer guide 3 and a transfer path 2, enters a prism 10 from an entrance part 11 to reach a reflecting face 13. The light is reflected to be in the horizontal direction and reaches a reflecting face 14, where the light is reflected again to a photodetecting element 8. The light reflected at the reflecting face 14 is, coming out of the prism 10 through a projection part 12 and passing the transfer path 2, sent into the photodetecting element 8 after penetrating a hole 6 of the transfer guide 3. When a mediums is transferred and passes between the light-emitting element 7 or photodetecting element 8 and the prism 10, the amount of light at the light-emitting element 7 is attenuated and the amount of light detected by the photodetecting element 8 is changed. Since a case 17 is formed in the periphery of the prism 10, disturbance lights are hard to enter the reflecting faces 13, 14 of the prism 10. The change of the amount of light can thus be detected correctly.
Description
The present invention relates to detect the medium detector of the medium of carrying on the delivery conduit with optical means, the photo detector that relates in particular to radiative luminous element and reception light is positioned at the same side of delivery conduit, and catoptrical reflecting body is positioned at the medium detector of delivery conduit opposite side.
In the past, the device that detects transport medium with optical means was the both sides that luminous element and photo detector are configured in the delivery conduit of transport medium, was received by photo detector by delivery conduit from the light of luminous element emission.And when medium on delivery conduit through out-of-date because medium have covered the light of luminous element emission, therefore make light not arrive photo detector, so detect just in transport medium.In this detecting device, for example when detected medium deflection, because must be from two position probing medium, so two pairs of luminous elements and photo detector must be set, will increase number of elements in other words, follow the increase of its quantity, circuit and connecting wire are all complicated.In order to adapt to this situation, prism is set as reflecting body, even when detecting the medium of deflection, also only need a pair of luminous element and photo detector.(opening flat 6-100205 communique) with reference to the spy
In above-mentioned existing detecting device, the prism that reflected light is used is exposed, so under situations such as testing fixture, finger might touch prism, and the problem that exists prism to be made dirty.In addition, owing to prism is exposed, so there is the problem that is subject to the stray light influence.
In order to address the above problem, medium detector of the present invention has luminous element and photo detector in a side of the delivery conduit of transport medium, opposite side at delivery conduit has reflecting body, this reflecting body have reflection come self-emission device light the 1st reflecting surface and will reflect the 2nd reflecting surface from the light of the 1st reflecting surface to photo detector, this medium detector be characterised in that be provided with the 1st and the 2nd reflecting surface that surrounds above-mentioned reflecting body around member.
As long as above-mentionedly can cover stray light around member, the lid that is installed in the 1st and the 2nd reflecting surface that covers reflecting body at least on the member can also be set in addition.
If adopt the present invention with said structure, because by being provided with, check that finger waits when waiting can not contact around member, so the reflecting body of can not making dirty.In addition because with stray light being covered, so the influence of interference-free light around member.
Fig. 1 is the block diagram of the medium detector of the 1st embodiment of the present invention.
Fig. 2 is the side cutaway view of the medium detector of the 1st embodiment.
Fig. 3 is the transparent view of the prism shell of the 2nd embodiment.
Fig. 4 is the section-drawing of the prism shell of the 2nd embodiment.
Among the figure 1: medium
2: delivery conduit
7: luminous element
8: photo detector
10: prism
13: the 1 reflecting surfaces
14: the 2 reflecting surfaces
22: cover
Embodiments of the invention are described below with reference to the accompanying drawings.Parts identical among each figure are marked with prosign.Fig. 1 is the block diagram of the medium detector of expression the 1st embodiment of the present invention, and Fig. 2 is the side cutaway view of the medium detector of expression the 1st embodiment, according to above-mentioned two figure the 1st embodiment is described.
Among two figure, the delivery conduit 2 of medium 1 is by carrying guide plate 3,4 to form up and down.Carry guide plate 3,4 being supported up and down, and guarantee the interval of stipulating by along continuous straight runs.Carry formation circular hole 5,6 on the guide plate 3 at upside, luminous element 7 and photo detector 8 insert in this hole 5,6 from top respectively.Luminous element 7 is made of light-emitting diode, and photo detector 8 is made of photistor, and the both is installed on the printed circuit board (PCB) 9.
Prism 10 is installed in downside and carries on the guide plate 4.Prism 10 by the high material of the ratio of refraction of light for example glass or light-transmissive resin make, it has light incident section 11 and light outgoing portion 12.Light incident section 11 cylindrical convex shape make the light incident of sending from luminous element 7.Light outgoing portion 12 cylindrical convex shape are the parts that penetrate light facing to photo detector 8.Prism 10 has the 1st reflecting surface 13 and the 2nd reflecting surface 14, the 1 reflecting surfaces 13 with the light along continuous straight runs reflection that comes from luminous element 7 direct projections, and the 2nd reflecting surface 14 will be from the direction reflection towards photo detector 8 of the light of the 1st reflecting surface 13.As shown in Figure 2, the leading section of light incident section 11 and light outgoing portion 12 has carried out chamfering or R processing, makes light incident section 11 and light outgoing portion 12 embed downside respectively and carries the hole 15,16 on the guide plate 4 that prism 10 is installed interiorly.As shown in Figure 2, light incident section 11 and light outgoing portion 12 15,16 are not projected into delivery conduit 2 from the hole.
In Fig. 2, adaptor union 19 is installed on the printed circuit board (PCB) 9, is connected on the not shown driving circuit by lead 20.
Next illustrates the action of the 1st embodiment.Pass the hole 5 of carrying on the guide plate 3 from the light of luminous element 7 emission,, and arrive the 1st reflecting surface 13 again by delivery conduit 2, incide prism 10 from light incident section 11.Light is arrived the 2nd reflecting surface 14 by along continuous straight runs reflection back herein, is reflected to the direction of photo detector 8 herein again.By the light of the 2nd reflecting surface 14 reflection from light outgoing portion 12 penetrate prisms 10, by delivery conduit 2, pass the hole 6 of carrying on the guide plate 3 again, enter photo detector 8.Launch light like this, receive light, just can detect the feed status of the medium 1 in the delivery conduit 2.
That is, by between luminous element 7 and the prism 10 or between photo detector 8 and the prism 10 time, therefore the light quantity of luminous element 7 decays medium 1 in course of conveying, and the light quantity that makes photo detector 8 receive changes.Have or not medium 1 by measuring the variation of the light quantity that photo detector 8 receives, can detecting, follow the variation of the light quantity that time lapse receives, can detect position, size or the delivery speed etc. of medium 1 by mensuration.At this moment, owing to around prism 10, form shell 17,, can detect the variation of light quantity exactly so stray light is difficult to enter the 1st and the 2nd reflecting surface 13,14 of prism 10.
In the above-described embodiments, prism 10 and shell 17 form as one, but also can not be an integral body.But under the situation of making prism 10 and shell 17 with identical materials, cost was low when both were formed one.When certain colored materials with light-proofness forms shell 17, also can not constitute one.
As mentioned above, if adopt the 1st embodiment, owing to around prism 10, establish shell 17, so when assembling or maintenance etc. under the situation, finger etc. is difficult for touching the 1st and the 2nd reflecting surface 13,14, can prevent from it is made dirty.In addition, because aspect ratio prism 10 height of shell 17 so stray light is little to the influence of the 1st and the 2nd reflecting surface 13,14, have the effect that can accurately detect medium 1.In addition, because the light incident section 11 and the light outgoing portion 12 cylindrical circular convex of prism 10, so, can easily carry out the location of prism 10 by they being embedded in the hole 15,16 on the downside conveying guide plate 4.Because incident light portion 11 and emergent light portion 12 are inserted into the inboard in hole 15,16, so do not contact medium 1, even but suppose to have contacted, because the leading section of incident light portion 11 and emergent light portion 12 carried out chamfering or was processed into cylinder (R) shape, so can not influence the feed status of medium 1.
Next illustrates the 2nd embodiment of the present invention.Fig. 3 is the transparent view of the prism shell of the 2nd embodiment, and Fig. 4 is the section-drawing of the prism shell of the 2nd embodiment.The medium detector of the 2nd embodiment also is provided with shade on the shell of prism except that the structure with the 1st embodiment.
In Fig. 3, Fig. 4, cover 22 is embedded in the inboard of shell 17.Cover 22 integral body and be box-shaped, form lug boss 23a, 23b in both sides.This lug boss 23a, 23b are embedded among hole 24a, the 24b that the both sides of shell 17 form, and cover 22 is fixed.Cover 22 is formed by low-cost resin.Common low-cost resin light-proofness is low, so use the prism 10 of the cover of being made by such resin 22 can be installed in the place that influenced by stray light.Other structure is identical with the 1st embodiment.
In the 2nd embodiment that as above constitutes, owing to be provided with cover 22, prism 10 quilt covers 22 cover, and dust etc. can be attached on the prism 10.Can increase the service life.
As the variation of above-mentioned the 2nd embodiment, can utilize the light-proofness member to form cover, adopt whole prisms 10, be about to the shape that light incident section 11 and light outgoing portion 12 also cover.As cover 22 material, use material get final product, but it is very expensive to cover the common price of resin of light of whole wavelength of light, gets final product so use has the resin of the performance that can cover photo detector 8 receivable wavelength light at least with shading performance.Owing to use the cover 22 of light-proofness is arranged, so be not subject to the influence of stray light, the detection of medium is more accurate.
By above detailed description as can be known, if adopt the present invention, then,, has the effect that is not subject to the stray light influence simultaneously so can prevent that prism from being made dirty owing to around prism, be provided with shell.
Claims (5)
1. medium detector comprises:
Side at the delivery conduit of transport medium is provided with luminous element and photo detector;
Opposite side at above-mentioned delivery conduit has reflecting body, this reflecting body has the light receiving part of the light that receives described luminous element emission, be used to reflect first reflecting surface of the light that receives through described light receiver branch, be used to reflect second reflecting surface of the light that described first surface reflects, and a light radiating portion, the light that described second reflecting surface is reflected is launched into described light receiving part through described smooth radiating portion; With
One is surrounded described first reflecting surface and described second reflecting surface of reflecting body around member, outside being exposed on of described light receiving part and described smooth radiating portion.
2. medium detector according to claim 1 is characterized in that: above-mentionedly be one around member and above-mentioned reflecting body.
3. medium detector according to claim 1 is characterized in that: above-mentioned around member be set up can block stray light.
4. medium detector according to claim 1 and 2 is characterized in that: be provided with and be installed in the above-mentioned lid that covers the 1st and the 2nd reflecting surface of above-mentioned reflecting body on the member at least that centers on.
5. medium detector according to claim 4 is characterized in that: above-mentioned lid is made by light screening material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13654095A JP3212485B2 (en) | 1995-06-02 | 1995-06-02 | Medium detection device |
| JP136540/95 | 1995-06-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1143179A CN1143179A (en) | 1997-02-19 |
| CN1082930C true CN1082930C (en) | 2002-04-17 |
Family
ID=15177588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96108106A Expired - Lifetime CN1082930C (en) | 1995-06-02 | 1996-05-29 | Medium detector |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3212485B2 (en) |
| KR (1) | KR100334446B1 (en) |
| CN (1) | CN1082930C (en) |
| TW (1) | TW360617B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6127482B2 (en) * | 2012-12-07 | 2017-05-17 | 沖電気工業株式会社 | Medium storing and feeding apparatus and medium processing apparatus |
| JP6356563B2 (en) * | 2014-09-29 | 2018-07-11 | 京セラ株式会社 | Optical sensor module |
| JP6515501B2 (en) * | 2014-11-20 | 2019-05-22 | 富士電機株式会社 | Paper sheet identification device |
| CN106158694A (en) * | 2015-04-10 | 2016-11-23 | 北京北方微电子基地设备工艺研究中心有限责任公司 | Detection device and semiconductor processing equipment |
| JP6533417B2 (en) * | 2015-06-03 | 2019-06-19 | 日立オムロンターミナルソリューションズ株式会社 | Paper handling equipment |
| JP7148867B2 (en) * | 2018-11-30 | 2022-10-06 | セイコーエプソン株式会社 | MEDIUM CONVEYING DEVICE, IMAGE READING DEVICE, AND CONVEYING CONTROL METHOD |
-
1995
- 1995-06-02 JP JP13654095A patent/JP3212485B2/en not_active Expired - Lifetime
-
1996
- 1996-05-11 TW TW085105583A patent/TW360617B/en not_active IP Right Cessation
- 1996-05-29 CN CN96108106A patent/CN1082930C/en not_active Expired - Lifetime
- 1996-05-31 KR KR1019960019283A patent/KR100334446B1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| JP3212485B2 (en) | 2001-09-25 |
| TW360617B (en) | 1999-06-11 |
| KR100334446B1 (en) | 2002-11-23 |
| KR970002756A (en) | 1997-01-28 |
| JPH08327315A (en) | 1996-12-13 |
| CN1143179A (en) | 1997-02-19 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20020417 |
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| EXPY | Termination of patent right or utility model |