FI76427C - Device for measuring the thickness of a veneer - Google Patents
Device for measuring the thickness of a veneer Download PDFInfo
- Publication number
- FI76427C FI76427C FI844282A FI844282A FI76427C FI 76427 C FI76427 C FI 76427C FI 844282 A FI844282 A FI 844282A FI 844282 A FI844282 A FI 844282A FI 76427 C FI76427 C FI 76427C
- Authority
- FI
- Finland
- Prior art keywords
- measuring
- veneer
- wood veneer
- support members
- thickness
- Prior art date
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Description
1 764271 76427
LAITE PUUVIILUN PAKSUUDEN MITTAAMISEKSI - ANORDNING FÖR MÄTNING AV TJOCKLEK AV ETT FANERDEVICE FOR MEASURING THE THICKNESS OF WOOD VENEER - ANORDNING FOR THE PURPOSE OF AV TJOCKLEK AV ETT FANER
Keksinnön kohteena on laite puuviilun paksuuden mittaamiseksi.The invention relates to a device for measuring the thickness of wood veneer.
Puuviilun paksuutta mitataan nykyisin mittalaitteilla, jois-5 sa puuviilu asetetaan mittauspäiden väliin ja mittauskär-jet puristetaan säädetyllä voimalla vastakkain. Standardin mukaisissa mittauksissa mittauskärkien puristusvoiman tulee olla 2 N/cm2. Puuviilun, ja erityisesti havupuuviilun, toisella puolella on yleensä puoli-irrallisia kuituja, ja pu-10 ristusvoiman ollessa pieni eivät nämä kuidut puristu kokoon ja huonopintaisen puuviilun paksuuden arvoksi saadaan mittauksissa liian suuria arvoja. Toinen ongelma on se, että paksuutta mitattaessa mittauskärjet samalla pitävät viilua paikallaan ja mittauskärkien puristusvoiman ollessa pieni 15 puuviilun asento mittauskärkeen nähden voi olla virheellinen, jolloin mittaustulokset eivät ole luotettavia.The thickness of wood veneer is currently measured with measuring devices, in which the wood veneer is placed between the measuring heads and the measuring tips are pressed against each other with a controlled force. For measurements according to the standard, the compressive force of the measuring tips must be 2 N / cm2. On one side of the wood veneer, and in particular the softwood veneer, there are generally semi-loose fibers, and with a low cross-sectional force of pu-10, these fibers are not compressed and the value of the poor-surfaced wood veneer thickness is too high in the measurements. Another problem is that when measuring the thickness, the measuring tips hold the veneer in place at the same time, and when the compressive force of the measuring tips is small, the position of the wood veneer relative to the measuring tip may be incorrect, resulting in unreliable measurement results.
Keksinnön tarkoituksena on tuoda esiin laite puuviilun paksuuden mittaamiseksi, joka poistaa nykyisten laitteiden 20 epäkohtia. Edelleen keksinnön tarkoituksena on tuoda esiin laite, jonka avulla puuviilun paksuus saadaan mitatuksi tarkasti ja luotettavasti. Lisäksi keksinnön tarkoituksena on tuoda esiin laite, joka on yksinkertainen valmistaa ja käyttää.The object of the invention is to provide a device for measuring the thickness of wood veneer, which eliminates the drawbacks of the current devices 20. It is a further object of the invention to provide a device by means of which the thickness of a wood veneer can be measured accurately and reliably. It is a further object of the invention to provide a device which is simple to manufacture and use.
2525
Keksinnön tarkoitus saavutetaan laitteella, jolle on pääasiassa tunnusomaista se, mitä on esitetty vaatimusosassa.The object of the invention is achieved by a device which is mainly characterized by what is stated in the claims.
Keksinnön mukaan laitteeseen kuuluu kaksi tukielintä, jotka 30 ovat sijoitettavissa kohdakkain puuviilun vastakkaisille puolille ja järjestetty liikutettaviksi toistensa suhteen puuviilun puristamiseksi tukielinten väliin, ja mittausanturi, joka on sijoitettu toisen tukielimen välittömään läheisyyteen ja järjestetty painettavaksi vasten puuviilua 35 ja mittaamaan vastakkaisella puolella puuviilua olevan ta- 2 76427 kielimen ja mittausanturin välistä etäisyyttä. Mitattava puuviilu asetetaan kahden tukielimen väliin ja mittausanturin mittauskärki kohdistetaan tukielimen läheisyyteen viilun pintaan, jolloin tukielimien puristusvoima ja mittauskärjen 5 puristusvoima ovat erikseen säädettävissä. Lisäksi tukielimien avulla viilua voidaan puristaa riittävällä voimalla viilun pitämiseksi oikeassa asennossa mittauksen aikana. Puuviilua puristavien ja sitä paikallaan pitävien tukielimien välinen puristusvoima voi olla esim. 5-20 N/cm2, jol-10 loin tukielimet puristavat myös huonopintaisen viilun pinnalla olevia puoli-irrallisia kuituja kokoon ja saadaan luotettavia mittaustuloksia. Tukielinten puristusvoimaa voidaan säätää ottaen huomioon viilun kosteus ja puulaji. Mittausanturin mittauskärjen puristusvoima on täsmälleen 15 vaaditun suuruinen, siis esim. 2 N/cm2.According to the invention, the device comprises two support members 30 which can be placed on opposite sides of the wood veneer and arranged to be moved relative to each other to press the wood veneer between the support members, and a measuring sensor arranged in the immediate vicinity of the second support member 76427 the distance between the tongue and the measuring sensor. The wood veneer to be measured is placed between two support members and the measuring tip of the measuring sensor is aligned with the support member on the surface of the veneer, whereby the compressive force of the support members and the compressive force of the measuring tip 5 can be adjusted separately. In addition, the support members allow the veneer to be compressed with sufficient force to hold the veneer in the correct position during the measurement. The compressive force between the support members compressing the wood veneer and holding it in place can be, for example, 5-20 N / cm 2, whereby the support members also compress the semi-loose fibers on the surface of the poor-surfaced veneer and obtain reliable measurement results. The compressive force of the support members can be adjusted taking into account the moisture of the veneer and the type of wood. The compressive force of the measuring tip of the measuring sensor is exactly 15 required, i.e. e.g. 2 N / cm2.
Seuraavaksi keksintöä selvitetään tarkemmin viittaamalla oheiseen piirustukseen, joka esittää erästä keksinnön mukaisen laitteen sovellutusta osittain poikkileikattuna ja 20 sivulta katsottuna.The invention will now be explained in more detail with reference to the accompanying drawing, which shows an application of a device according to the invention, partly in cross-section and seen from 20 sides.
Kuvassa esitettyyn laitteeseen kuuluu kaksi tukielintä 1,2, jotka tässä sovellutuksessa ovat renkaanmuotoisia elimiä, ja toisen renkaan 1 keskelle sijoitettu mittausanturin mit-25 tauskärki A. Puuviilu 3 sijoitetaan renkaiden väliin ja renkaat ovat liikutettavissa toistensa suhteen. Renkaat puristetaan vastakkain säädetyllä voimalla, jolloin otetaan huomioon puuviilun pinnan laatu ja pyritään siihen, etteivät' renkaat purista varsinaista viilua kokoon vaan 30 sen pinnalla olevia kuitusäikeitä. Mittausanturin mittauskärki on sijoitettu viilun tasaiselle puolelle ja se on järjestetty painettavaksi viilun pintaa vasten halutulla voimalla, tässä tapauksessa standardin mukaisella voimalla. Renkaiden ollessa puristettuina vasten puuviilua ja mittaus-35 kärjen ollessa myös mittausasennossaan painettuna vasten viilun pintaa mitataan mittauskärjen ja viilun toisella puolella olevan renkaan välinen etäisyys , joka on sama 3 76427 kuin viilun paksuus. Mittausanturiin voidaan liittää tunnetulla tavalla esim. digitaalinen näyttö ja/tai mikrotietokone, joka laskee mittaustulokset, niiden keskiarvot ja hajonnat.The device shown in the figure comprises two support members 1,2, which in this application are annular members, and a measuring probe A of a measuring sensor placed in the middle of the second ring 1. The veneer 3 is placed between the rings and the rings are movable relative to each other. The rings are compressed with a counter-adjusted force, taking into account the quality of the surface of the wood veneer and aiming not to compress the actual veneer but to the 30 fiber strands on its surface. The measuring tip of the measuring sensor is placed on the flat side of the veneer and is arranged to be pressed against the surface of the veneer with the desired force, in this case the force according to the standard. With the rings pressed against the wood veneer and the measuring tip 35 also pressed against the surface of the veneer in its measuring position, the distance between the measuring tip and the ring on the other side of the veneer is measured, which is the same 3 76427 as the thickness of the veneer. For example, a digital display and / or a microcomputer can be connected to the measuring sensor in a known manner, which calculates the measurement results, their means and standard deviations.
55
Keksintöä ei rajata esitettyyn sovellutukseen vaan se voi vaihdella patenttivaatimusten puitteissa.The invention is not limited to the embodiment presented but may vary within the scope of the claims.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI844282A FI76427C (en) | 1984-11-01 | 1984-11-01 | Device for measuring the thickness of a veneer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI844282 | 1984-11-01 | ||
FI844282A FI76427C (en) | 1984-11-01 | 1984-11-01 | Device for measuring the thickness of a veneer |
Publications (4)
Publication Number | Publication Date |
---|---|
FI844282A0 FI844282A0 (en) | 1984-11-01 |
FI844282L FI844282L (en) | 1986-05-02 |
FI76427B FI76427B (en) | 1988-06-30 |
FI76427C true FI76427C (en) | 1988-10-10 |
Family
ID=8519821
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI844282A FI76427C (en) | 1984-11-01 | 1984-11-01 | Device for measuring the thickness of a veneer |
Country Status (1)
Country | Link |
---|---|
FI (1) | FI76427C (en) |
-
1984
- 1984-11-01 FI FI844282A patent/FI76427C/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
FI76427B (en) | 1988-06-30 |
FI844282L (en) | 1986-05-02 |
FI844282A0 (en) | 1984-11-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM | Patent lapsed |
Owner name: VALTION TEKNILLINEN TUTKIMUSKESKUS |