JPS6117642B2 - - Google Patents
Info
- Publication number
- JPS6117642B2 JPS6117642B2 JP15847780A JP15847780A JPS6117642B2 JP S6117642 B2 JPS6117642 B2 JP S6117642B2 JP 15847780 A JP15847780 A JP 15847780A JP 15847780 A JP15847780 A JP 15847780A JP S6117642 B2 JPS6117642 B2 JP S6117642B2
- Authority
- JP
- Japan
- Prior art keywords
- log
- light
- cutting
- logs
- cut
- 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
Links
- 238000005520 cutting process Methods 0.000 claims description 27
- 239000002023 wood Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 7
- 230000003287 optical effect Effects 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Landscapes
- Manufacture Of Wood Veneers (AREA)
Description
【発明の詳細な説明】
本発明は、原木丸太を、例えば、ベニヤレース
へ装架するため所定長さに切断するにあたり、切
断した原木丸太の施削時における回転軸とほぼ直
交する面で切断するようにした原木丸太の玉切り
方法および装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for cutting raw logs into a predetermined length for mounting on a veneer race, for example, by cutting the raw logs in a plane substantially perpendicular to the axis of rotation of the cut logs during machining. This invention relates to a method and device for cutting raw wood logs.
一般に、原木丸太をベニヤレースで施削してベ
ニヤ単板を製造するにあたつては、原木丸太を断
面Ｖ型のライブローラーに載せて切断位置まで搬
送し、ライブローラーに載せた状態でその端面か
ら長さを測定し、５尺，６尺あるいは３尺等の単
位長さに切断することが行なわれる。 Generally, when manufacturing a veneer veneer by cutting a raw log with a veneer lace, the log is placed on a live roller with a V-shaped cross section, transported to the cutting position, and then placed on the live roller. The length is measured from the end face and cut into unit lengths such as 5, 6, or 3 shaku.
しかして、原木丸太は、普通の大きさで直径１
ｍ前後、長さ８〜20ｍ前後あつて、節やこぶ等が
存したり、歪曲したりしているため、これをライ
ブローラーにより位置決めした場合、ライブロー
ラーの中心線に対して原木丸太の中心線が傾斜し
てしまうことが往々にして生ずる。 However, a log log is a normal size with a diameter of 1
The length of the log is approximately 8 to 20 m, and there are knots, bumps, etc., and it is distorted, so when positioning it with a live roller, the center of the log is relative to the center line of the live roller. It often happens that the line becomes slanted.
すなわち、第１図に示すように、原木丸太１を
矢符Ａ方向に搬送しつつ、ライブローラーで位置
決めされた中心線Ｘに直交配置されたチエンソー
で切断した場合、切断された端面a1，a2，…a5
は、切断後の原木丸太１ａ，１ｂ，１ｃ，１ｄの
中心線X1，X2，X3，X4に対して相当ずれてしま
う。 That is, as shown in FIG. 1, when a raw wood log 1 is transported in the direction of arrow A and cut with a chain saw arranged orthogonally to the center line X positioned by a live roller, the cut end faces a 1 , a 2 ,...a 5
are considerably shifted from the center lines X 1 , X 2 , X 3 , and X 4 of the logs 1a, 1b, 1c, and 1d after cutting.
したがつて、このような、例えば原木丸太１ｂ
をベニヤレースに装架する場合、第２図に示すよ
うに、スピンドル２のチヤツク３による把持力が
不均等になつて、回転駆動力を確実に伝達できな
かつたり、原木の中心をはずれた位置に把持圧力
が矢符Ｂ方向に加わるため原木丸太が撓む等の不
具合を生じていた。更に、このような状態で施削
した場合、削成されたベニヤ単板の両端縁は不平
行となつて切除する必要が生じ、その分を見込ん
で原木丸太を長目に切断するため、歩留りが低く
なるという欠点もあつた。 Therefore, such, for example, log log 1b
When mounting the log on a veneer race, as shown in Fig. 2, the gripping force of the chuck 3 of the spindle 2 becomes uneven, making it impossible to reliably transmit the rotational driving force, or causing the log to be placed in an off-center position. Since gripping pressure is applied in the direction of arrow B, problems such as bending of the logs have occurred. Furthermore, when cutting under such conditions, the edges of the cut veneer veneer become non-parallel and need to be cut, and the logs are cut long to account for this, which reduces the yield. It also had the disadvantage of being low.
本発明は、かかる従来の欠点を解消すべくなさ
れたもので、原木丸太の切断に先立つて、施削時
における回転軸とほぼ直交する面で切断するよう
に、原木丸太の位置を矯正するようにした原木丸
太の施削方法および装置を提供しようとするもの
である。 The present invention was made in order to eliminate such conventional drawbacks, and, prior to cutting the log, the position of the log is corrected so that the log is cut in a plane substantially perpendicular to the axis of rotation during cutting. The present invention aims to provide a method and device for cutting raw wood logs.
以下図面に示す一実施例につき、その詳細を説
明する。 The details of one embodiment shown in the drawings will be explained below.
第３図において、符号４は、長尺の原木丸太５
を載置して矢符Ｃ方向に搬送するライブローラー
である。このライブローラー４の転子間には、所
定の間隔をおいて、搬送方向と直交する水平方向
（矢符Ｄで示す）および上下方向（矢符Ｅで示
す）に、図示を省略した駆動装置により駆動され
る原木受台６ａ，６ｂ，…（図では２個のみを示
す）が配置されている。７は、光電管を用いた非
接触スイツチで、ライブローラーの駆動時原木丸
太の先端を検知してライブローラー４を停止させ
る信号を出力する。８は、ライブローラー４の搬
送方向と直交する面内で枢軸９を中心にして矢符
Ｆ方向に回動するよう設置されたチエンソーであ
る。１０は、複数個の光源１０ａ，１０ｂ，１０
ｃを水平方向に列設させた投光装置、１１は、複
数個の光源１１ａ，１１ｂ，１１ｃを垂直方向に
列設させた投光装置である。 In FIG. 3, reference numeral 4 indicates a long raw wood log 5.
This is a live roller that carries the paper in the direction of arrow C. A drive device (not shown) is provided between the trochanters of this live roller 4 at a predetermined interval in the horizontal direction (indicated by arrow D) and in the vertical direction (indicated by arrow E) perpendicular to the conveyance direction. Log holders 6a, 6b, ... (only two are shown in the figure) are arranged, which are driven by. 7 is a non-contact switch using a phototube, which detects the tip of the log when the live roller is driven and outputs a signal to stop the live roller 4. Reference numeral 8 denotes a chain saw that is installed to rotate in the direction of arrow F about a pivot shaft 9 within a plane orthogonal to the conveying direction of the live roller 4. 10 is a plurality of light sources 10a, 10b, 10
A light projecting device 11 has a plurality of light sources 11a, 11b, and 11c arranged in a vertical direction.
これらの投光装置１０，１１の各光源は、各光
源の列が原木丸太の端末近傍において原木丸太の
外周を横切り、かつ各光源からの照射光が切断装
置が切断する原木丸太の切断面と直交するように
配置されている。 Each of the light sources of these light projecting devices 10 and 11 has a row of light sources that crosses the outer periphery of the log near the end of the log, and the irradiation light from each light source is connected to the cut surface of the log that is cut by the cutting device. are arranged orthogonally.
受光装置１２，１３は、投光装置１０，１１の
光源１０ａ，１０ｂ，１０ｃ，１１ａ，１１ｂ，
１１ｃ側と、原木丸太５の全長を挾んでそれぞれ
対向配置されており、各光源１０ａ，１０ｂ，１
０ｃ，１１ａ，１１ｂ，１１ｃからの平行光線の
照射位置にそれぞれ図には示されていない受光素
子が配置されている。 The light receiving devices 12, 13 are light sources 10a, 10b, 10c, 11a, 11b, of the light projecting devices 10, 11,
11c side, and the light sources 10a, 10b, 1 are arranged opposite to each other across the entire length of the log 5.
Light-receiving elements (not shown in the figure) are arranged at the irradiation positions of the parallel light beams from 0c, 11a, 11b, and 11c, respectively.
これらの受光素子の出力は、オペレータの前の
制御盤に表示され、原木丸太が光源１０ａ，１０
ｂ，１０ｃ，１１ａ，１１ｂ，１１ｃからの平行
光線を遮光することにより、ライブローラーの搬
送方向から見た原木丸太５の幅および高さがわか
るようになつている。なお、図では投光装置およ
び受光装置として、それぞれ水平方向に一組、垂
直方向に一組設けた例を示したが、水平方向に左
右に一組ずつ投光装置と受光装置とを設けたり、
更に、45゜および135゜の方向に別に投光装置と
受光装置とを一組ずつ設けるようにしてもよい。 The outputs of these light receiving elements are displayed on the control panel in front of the operator, and the logs are displayed as light sources 10a and 10.
By blocking the parallel light beams from b, 10c, 11a, 11b, and 11c, the width and height of the log 5 as seen from the conveyance direction of the live rollers can be seen. Note that although the figure shows an example in which one set of light projecting device and one set of light receiving device are provided in the horizontal direction and one set in the vertical direction, it is also possible to provide one set of light projecting device and one set of light receiving device in the horizontal direction on the left and right. ,
Furthermore, separate sets of a light projecting device and a light receiving device may be provided in the 45° and 135° directions.
投光装置１０，１１および受光装置１２，１３
は、それぞれ矢符ＧおよびＨ方向に可動とされ、
使用時にそれぞれ原木丸太外周の延長面を横切る
位置に配置され、不使用時には原木丸太の搬送を
妨げないよう原木丸太外周の延長面外へ移動され
る。 Light projecting devices 10, 11 and light receiving devices 12, 13
are movable in the directions of arrows G and H, respectively,
When in use, they are placed at positions that cross the extended surface of the outer periphery of the log, and when not in use, they are moved outside the extended surface of the outer periphery of the log so as not to impede transportation of the log.
上記構成の玉切り装置では、長尺の原木丸太５
は、ライブローラー４に載置されて矢符Ｃ方向へ
送られる。そしてその先端部が非接触スイツチ７
の位置まできて、非接触スイツチ７に検知される
と制御装置からライブローラー４の駆動装置に停
止信号が出力される。ここで原木丸太の切断すべ
き位置は、チエンソー８の回動面と一致すること
になる。 In the ball cutting device with the above configuration, the long raw wood log 5
is placed on the live roller 4 and sent in the direction of arrow C. And its tip is a non-contact switch 7
When the position is reached and detected by the non-contact switch 7, a stop signal is output from the control device to the drive device of the live roller 4. Here, the position at which the raw wood log should be cut coincides with the rotating surface of the chain saw 8.
次に投光装置１０，１１および受光装置１２，
１３が、原木丸太５の外周延長面を横切る位置ま
で移動され、投光装置１０，１１の光源１０ａ，
１０ｂ，１０ｃ，１１ａ，１１ｂ，１１ｃから平
行光線が投射される。 Next, the light projecting devices 10, 11 and the light receiving device 12,
13 is moved to a position where it crosses the outer peripheral extension surface of the raw wood log 5, and the light sources 10a, 13 of the light projectors 10, 11
Parallel light rays are projected from 10b, 10c, 11a, 11b, and 11c.
しかして、各平行光線延長上の受光素子のう
ち、原木丸太５により遮光されないものについて
は、受光信号を制御盤の表示装置に出力するの
で、表示装置に表わされた結果により搬送方向側
から見た原木丸太５の幅および高さがわかる。こ
こで第４図に示すように、原木丸太５が平行光線
Ｌ、すなわちチエンソー８の切断面と直交する方
向に対して傾いていると第５図Ａに示すように、
傾いていない場合に比べて原木丸太により遮光さ
れる平行光線の数が多くなり、したがつて受光す
る受光素子の数は少なくなる。オペレータは、第
６図に示すように、原木丸太５の搬送路上へ直交
配置した投光装置１５と受光装置１６を使用し
て、あるいは他の張当な手段により原木丸太５の
外径を測定しておき、制御盤の表示装置に表示さ
れた受光素子の受光状況が、この外径とほぼ一致
するように、若しくは受光する受光素子の数が最
も多くなるように、すなわち第５図Ｂの状態とな
るように原木受台６ａの駆動装置を制御して原木
丸太の方向を矯正させる。この場合、原木丸太５
を挾んで投光装置１０と受光装置１１の水平方向
反対側の位置に他の投光装置と受光装置の組を配
置しておくことが望ましい（図では受光装置１
２，１２′のみを示し、遮光された受光素子を黒
丸、受光した受光素子を白丸で示した）。 Among the light-receiving elements on the extension of each parallel beam, those that are not blocked by the log 5 output the light-receiving signal to the display device of the control panel. The width and height of the log 5 seen can be seen. Here, as shown in FIG. 4, if the log 5 is inclined with respect to the parallel light beam L, that is, the direction perpendicular to the cutting surface of the chain saw 8, as shown in FIG. 5A,
Compared to the case where the log is not tilted, the number of parallel light rays blocked by the logs increases, and therefore the number of light receiving elements that receive light decreases. As shown in FIG. 6, the operator measures the outer diameter of the log 5 using a light projecting device 15 and a light receiving device 16 arranged orthogonally on the transportation path of the log 5, or by other suitable means. In advance, the light receiving status of the light receiving elements displayed on the display device of the control panel should be adjusted so that it almost matches this outer diameter, or so that the number of light receiving elements receiving light is maximized, that is, as shown in Fig. 5B. The driving device of the log holder 6a is controlled so that the log is in the correct direction, and the direction of the log is corrected. In this case, log log 5
It is desirable to place another pair of light emitting device and light receiving device on the opposite side of the light emitting device 10 and light receiving device 11 in the horizontal direction (in the figure, the light receiving device 1
2 and 12' are shown, the light receiving elements that were shielded from light are shown as black circles, and the light receiving elements that received light are shown as white circles).
なお、投光装置と受光装置とは連動して平行光
線が受光可能なようにしておく必要があるが、こ
れらの投光装置と受光装置の組の全体を原木受台
の移動に追随して移動するように構成してもよ
い。 Note that the light projector and light receiver must work together so that they can receive parallel light beams, but the entire set of light projector and light receiver must follow the movement of the log holder. It may be configured to move.
このようにして原木丸太の方向を矯正した後チ
エンソーを作動させて所定の長さに切断する。以
下同様にして切断の都原木丸太の方向を矯正して
原木の切断が行なわれる。 After correcting the direction of the raw wood log in this way, a chain saw is operated to cut it into a predetermined length. Thereafter, the direction of the log to be cut is corrected and the log is cut in the same manner.
なお、チエンソーは搬送方向に沿つて所定の間
隔を置いて２基設置し、先端部の成形と定尺切断
とを同時に行なうようにしてもよい。 Note that two chain saws may be installed at a predetermined interval along the conveyance direction so that shaping of the tip and cutting to a fixed length are performed simultaneously.
以上のように構成された本発明によれば、玉切
り後の原木丸太の両端面がベニヤレースに装架時
の回転軸とほぼ直交するようになるため、スピン
ドルのチヤツクは均等に原木端面を押圧し、駆動
力が均一に原木丸太に伝達され、また押圧力の方
向も回転軸の方向と一致するから、施削が円滑に
行なわれ、また原木丸太がたわむようなこともな
くなる。更に、削成されたベニヤ単板は両側縁が
平行となり、罫引きナイフにより除去される部分
は僅少となるので歩留りも向上し、かつ人手によ
りその都度計尺して切断位置を設定する手間も省
ける。 According to the present invention configured as described above, both end faces of the raw wood log after round cutting are almost perpendicular to the rotation axis when mounted on the veneer race, so the chuck of the spindle evenly cuts the end faces of the raw wood log. The pressing force is uniformly transmitted to the raw logs, and the direction of the pressing force also coincides with the direction of the rotating shaft, so cutting is carried out smoothly and the logs do not bend. Furthermore, the edges of the cut veneer veneer are parallel, and the portion removed by the scoring knife is small, which improves yield and eliminates the hassle of manually measuring and setting the cutting position each time. It can be omitted.
なお、以上の実施例では、原木丸太の位置修正
装置としてライブローラーと別個の原木丸太を使
用したが、ライブローラーの一部の転子に同様の
位置修正機能をもたせてもよい。また原木受台を
上昇させて位置修正を行なう代りに、ライブロー
ラー４に昇降機能をもたせて、通常の搬送位置か
ら下降させて原木丸太５を原木受台６に支持さ
せ、この状態から位置修正を行なわせるようにし
てもよい。 In the above embodiment, a live roller and a separate raw log were used as the log position correction device, but some of the trochanters of the live roller may have a similar position correction function. In addition, instead of raising the log holder to correct the position, the live roller 4 is provided with an elevating function and is lowered from the normal conveying position to support the log 5 on the log holder 6, and the position is corrected from this state. You may also have them do this.
更に、受光装置を用いることなく、投光装置か
ら有色平行光線を照射し、この光線が原木丸太外
周に投射される位置を目視しながらオペレーター
が原木丸太の位置矯正を行なうようにしてもよ
い。 Furthermore, without using a light receiving device, a colored parallel light beam may be emitted from a light projecting device, and the operator may correct the position of the log while visually observing the position where the beam is projected onto the outer periphery of the log.
この場合、点光源とされた投光装置から照射さ
れた有色平行光線の投影が原木丸太の表面に長手
方向に一様に認められれば、その原木丸太は有色
平行光線の光軸と平行であり、投影が認められな
ければ光軸に対して平行か先端が下がつており、
また投影が長点状あるいは断続的に現われれば先
端側において光軸と交叉していることになるか
ら、有色平行光線の原木丸太上への投影から原木
丸太の姿勢位置を知ることができ、これに基づい
てオペーレーターが手動により原木丸太の位置を
矯正することができる。 In this case, if the projection of the colored parallel rays emitted from the point light source is uniformly observed on the surface of the log in the longitudinal direction, then the log is parallel to the optical axis of the colored parallel rays. , if projection is not observed, it is parallel to the optical axis or the tip is downward.
Furthermore, if the projection appears in the form of a long dot or intermittently, it means that it intersects the optical axis at the tip side, so the posture and position of the log can be determined from the projection of the colored parallel rays onto the log. Based on this, the operator can manually correct the position of the log.
第１図は従来法による原木丸太の切断端面を示
す側面図、第２図は従来法により切断された原木
丸太をベニヤレースのチヤツクに把持させた状態
を示す正面図、第３図は本発明の一実施例を示す
斜視図、第４図および第５図は本発明による位置
修正方法を示す原理図、第６図は原木丸太の外径
測定方法を示す正面図である。
４……ライブローラー、５……原木丸太、６…
…原木受台、７……非接触スイツチ、８……チエ
ンソー、１０，１１……投光装置、１２，１３…
…受光装置。
Fig. 1 is a side view showing the cut end surface of a log cut by the conventional method, Fig. 2 is a front view showing the log cut by the conventional method and held in a chuck made of veneer lace, and Fig. 3 is the invention according to the present invention. 4 and 5 are principle views showing the position correction method according to the present invention, and FIG. 6 is a front view showing the method for measuring the outer diameter of logs. 4... Live roller, 5... Log log, 6...
... Log pedestal, 7... Non-contact switch, 8... Chain saw, 10, 11... Light projector, 12, 13...
...Light receiving device.
Claims (1)
前記原木丸太の一側近傍に、複数個の光源を列設
させた投光装置を、前記光源の列が原木丸太の外
周を横切り、かつ各光源からの照射光が切断装置
が切断する原木丸太の切断面と直交するよう配置
して前記光源から平行光線を照射すると共に、前
記原木丸太の両端面外周の対応する位置を結ぶ線
が前記平行光線とほぼ平行となるよう原木丸太の
位置を矯正して原木丸太を切断することを特徴と
する原木丸太の玉切り方法。 ２ 原木丸太を挾んで、投光装置の各光源に対向
させて複数個の受光素子を配置し、原木丸太によ
り遮光される受光素子の数が少なくなるよう原木
丸太の位置を移動させる特許請求の範囲第１項記
載の原木丸太の玉切り方法。 ３ 刃部がほぼ垂直方向に移動して、ほぼ水平に
置かれた原木丸太を所定長さに切断する切断装置
と、前記原木丸太の一端の空間位置を他端に対し
て相対移動させる位置修正装置と、複数個の光源
を、それぞれ前記切断装置が切断する原木丸太の
切断面と直交させ、かつ前記原木丸太の端末近傍
に原木丸太の外周を横切つて列設させた投光装置
と、前記原木丸太の他端末近傍に、前記投光装置
の各光源と対向配置させた複数個の受光素子を有
する受光装置と、前記原木丸太とその長手方向に
搬送する搬送装置とを備えたことを特徴とする原
木丸太の玉切り装置。 ４ 投光装置と受光装置とは、原木丸太の周方向
に沿つて、それぞれ複数個対向配置されて成る特
許請求の範囲第３項記載の原木丸太の玉切り装
置。[Claims] 1. In cutting a log into a predetermined length,
A light projecting device having a plurality of light sources arranged in a row near one side of the log is used to cut the log, and the row of light sources crosses the outer periphery of the log, and the irradiation light from each light source is used to cut the log by a cutting device. The light source is arranged to be perpendicular to the cut surface of the log and irradiates parallel light from the light source, and the position of the log is corrected so that a line connecting corresponding positions on the outer periphery of both end faces of the log is approximately parallel to the parallel beam. A method for cutting raw wood logs into balls by cutting the raw wood logs. 2. A patent claim in which a plurality of light-receiving elements are placed between the logs and facing each light source of a light projection device, and the position of the logs is moved so that the number of light-receiving elements blocked by the logs is reduced. The method for cutting raw wood logs as described in Scope 1. 3. A cutting device whose blade portion moves in a substantially vertical direction to cut a log placed substantially horizontally into a predetermined length, and a position correction device that moves the spatial position of one end of the log relative to the other end. a light projecting device in which a plurality of light sources are arranged perpendicularly to the cutting surface of the log cut by the cutting device, and arranged in a row across the outer periphery of the log near the end of the log; A light-receiving device having a plurality of light-receiving elements arranged to face each light source of the light projecting device is provided near the other end of the log, and a conveying device for conveying the log and its longitudinal direction. Features: A device for cutting raw wood logs into balls. 4. The log cutting device according to claim 3, wherein a plurality of the light projecting device and the light receiving device are arranged facing each other along the circumferential direction of the log.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15847780A JPS5782001A (en) | 1980-11-11 | 1980-11-11 | Method and apparatus for cutting material wood log in round slice |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15847780A JPS5782001A (en) | 1980-11-11 | 1980-11-11 | Method and apparatus for cutting material wood log in round slice |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5782001A JPS5782001A (en) | 1982-05-22 |
| JPS6117642B2 true JPS6117642B2 (en) | 1986-05-08 |
Family
ID=15672590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15847780A Granted JPS5782001A (en) | 1980-11-11 | 1980-11-11 | Method and apparatus for cutting material wood log in round slice |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5782001A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0360045U (en) * | 1989-10-18 | 1991-06-13 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2520377B2 (en) * | 1986-04-11 | 1996-07-31 | 株式会社 名南製作所 | Log diameter detector |
-
1980
- 1980-11-11 JP JP15847780A patent/JPS5782001A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0360045U (en) * | 1989-10-18 | 1991-06-13 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5782001A (en) | 1982-05-22 |
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