JP5952467B2 - Preparation method of log for lumber and lumber method of log using the same - Google Patents

Description

  The present invention relates to a method for preparing a log for lumber that is used to feed and log a log in a lumber machine, and a lumber method for a log that uses the log.

  Necessary to feed log material in only one direction by providing cutting blades for cutting log materials into chips and saw blades for breaking log materials on top, bottom, left and right in addition to cutting blades for top, bottom, left and right wood ends. 2. Description of the Related Art A lumber feeding apparatus that incorporates a feeding chain into a base frame via a chain frame that can be moved up and down individually has been proposed for a lumber machine that can cope with a simple wood plan (Patent Document 1).

  This material feeding device is capable of performing lumbering by executing an arbitrary tree-cutting plan by constraining the log material on the material feeding chain so that it can be fed by a guide sprocket and feeding it to the lumber machine. Compared to the conventional feeding device that reciprocates while rotating the material by 90 °, the material feeding device can be reduced in size and the cycle time can be shortened.

JP 2010-52352 A

  According to such prior art, when a log material is put into a feeding device and set on a feeding chain, a skilled manual operation of turning the log material into a downward posture is required, and the cycle time and the yield are reduced. There was a problem that there was room for improvement.

  Accordingly, in view of the problems of the prior art, an object of the present invention is to set a log material automatically on a feed chain based on the shape data of the log material, and based on the entire cross-sectional shape data collected by a laser sensor. By setting the sawing conditions, we provide a method for preparing a log for sawing that can improve the yield and at the same time realize a fully automatic operation with a shorter cycle time, and a method of sawing a log using this There is to do.

  The structure of the first invention according to this application for achieving such an object (referring to the invention according to claim 1, the same applies hereinafter) is higher than the feed chain at the left and right symmetrical positions of the feed chain. Shape data including the cross-sectional shape of the entire circumference of the log material at multiple locations using the rotation sensor and the outer periphery detection sensor, and rotating the log material through the rotating sprocket. Based on the shape data, rotate the log so that the front and rear ends of the log are the lowest, and feed the horizontal bend from the front end to the rear end of the log. The posture of the log is controlled so that it is distributed to the left and right of the chain, the rotary sprocket is lowered below the feed chain, the log is transferred onto the feed chain, and the log on the feed chain is guided by the guide sprocket. It is referred to as its gist to Okuzai restrains.

  When the log material is controlled to rotate, the log material can be rotated via the rotating sprocket, and the rotation angle of the log material can be detected by the rotation sensor.

  Further, when controlling the posture of the log material, the rotary sprocket supporting the front end portion and the rear end portion of the log material may be shifted left and right.

  The configuration of the second invention (referring to the invention according to claim 4, the same applies hereinafter) is that a log sensor restrained on the feed chain by the method for preparing a log for lumber according to the first invention is provided with a shape sensor from the input part. Set the sawing conditions including the left and right tilt and front / rear height of the log material of the setting part using the whole cross-sectional shape data of the log material collected by the shape sensor, and prepare the sawing machine However, the gist is that the log material is fed to a saw machine while the sawing conditions are maintained.

  In addition, it is possible to feed the log material of the setting unit to the setting machine and simultaneously feed the log material of the setting unit to the sawing machine by a common feeding chain.

  Moreover, you may implement the one part or all process of the preparation method of the log for lumbering during log feeding.

  According to the configuration of the first aspect of the present invention, the rotary sprocket for feeding the log material is above the feed chain and can feed the log material onto the feed chain without interfering with the feed chain. Since the outer periphery detection sensor can acquire the shape data of a plurality of locations of the log material, the rotary sprocket controls the rotation of the log material so that the front end portion and the rear end portion are lowest based on the shape data, By descending below the feed chain, the log can be transferred onto the feed chain automatically with the log being automatically bent downward. Further, the guide sprocket restrains the log material on the feed chain from above so that the log material can be fed. The outer periphery detection sensor obtains shape data including the cross-sectional shape of the entire circumference of the log material by rotating the log material at least 1/2 through the rotating sprocket while sandwiching the log material between the left and right detection rods, for example. To do. In addition, the series of steps described above can be fully automated, and no manual operation is required.

  The log material can realize a sawing posture with a higher yield by controlling the posture so that the horizontal bending is distributed to the left and right of the feeding chain after the rotation control. Such posture control is realized by shifting the rotary sprocket supporting the front end and the rear end of the log material to the left and right.

  Logs with the front end on the front side are smooth because the guide sprocket rotates diagonally downward on the outer periphery of the log from the large diameter main port to the small diameter end when feeding with the feed chain. Materials can be sent.

  According to the configuration of the second invention, the log material on the feed chain is fed to the setting unit via the shape sensor in a predetermined stable posture set in the feeding unit, and the detailed overall cross-sectional shape by the shape sensor Data can be collected. The entire cross-sectional shape data is used for the wood plan, and according to this wood plan, the sawing conditions including the left and right inclination and the front and back height are set on the feed chain, and the sawing conditions are maintained and the sawing conditions are maintained. The material is sent to the machine to be sawn. Therefore, the log is optimally planned for each shape, and the yield can be improved to the maximum. As the shape sensor, for example, a laser sensor in which a plurality of laser light projecting and receiving elements are arranged in a tunnel-shaped frame that allows a log material to pass back and forth can be used.

  If the log of the input part is fed to the setting part via the common feeding chain, and if the log of the setting part is fed to the sawing machine, it will require special members and time for transferring the log. The cycle time can be shortened.

  If some or all of the steps for preparing a log for lumbering are carried out during log feeding, the cycle time can be further shortened.

Overall configuration schematic front view Perspective view of main part configuration (1) Perspective view of main part configuration (2) Explanatory drawing of essential parts Main part enlarged operation diagram (1) Main part enlarged perspective view (1) Main part enlarged perspective view (2) Main part enlarged operation diagram (2) Overall operation diagram Main part operation explanatory drawing (1) Main part operation explanatory drawing (2) Main part operation explanatory drawing (3)

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  A method for preparing a log for lumbering and a material feeding apparatus for carrying out a log lumbering method using the log lumber include an upstream input unit and a downstream setting unit (FIG. 1). The feeding unit and the setting unit are connected via a common feeding chain 21, and the feeding unit chain frame 23 and the setting unit chain frame 24 for the feeding chain 21 are vertically connected via a connecting shaft 22. They are connected so as to be relatively rotatable (FIGS. 2 and 3). In addition, a laser sensor 70 as a shape sensor that penetrates the feed chain 21 back and forth is installed at the front end portion of the chain frame 23 of the input portion via attachment portions 71 and 71 (FIGS. 2 and 4). . However, in FIGS. 1 to 3, the front side and the rear side are the left side and the right side, respectively, and the traveling direction of the feeding chain 21 is the arrow direction in FIG. 1. FIG. 1 schematically shows the rear portion of the sawing machine MC disposed in front of the feed chain 21 of the setting unit, and the left and right cuttings other than for cutting the wood at the rear end of the sawing machine MC are illustrated. One side of the blades MC1, MC1, upper and lower cutting blades MC2, MC2 are shown.

  The feeding section includes a base frame 11 that is long in the front and rear, a chain frame 23 for a feeding chain 21 incorporated in the base frame 11, four sets of guide sprockets 31, 31 arranged above the feeding chain 21, and a feeding material. Rotating sprockets 41, 41... Arranged in front and rear two sets of two each on the left and right sides of the chain 21, outer periphery detection sensors 50, 50. And a rotation sensor 60 in front of the sprockets 31, 31... (FIGS. 1 and 2). However, illustration of the foremost guide sprocket 31 is omitted in FIG.

  A rear end portion of the chain frame 23 of the insertion portion is supported so as to be able to be lifted and lowered via a lifting device 13 at the rear end of the base frame 11. The elevating device 13 has an elevating plate 13c mounted on a swinging plate 13b that can swing back and forth via a horizontal shaft 13a, and the elevating plate 13c can be driven up and down via an elevating motor 13d. The elevating plate 13c and the chain frame 23 are connected via a support shaft 13e and a cross member 33a, and the chain frame 23 can swing up and down with respect to the elevating plate 13c via the support shaft 13e. The front end of the chain frame 23 is connected to the rear end of the chain frame 24 of the setting portion via the connecting shaft 22 and can be moved up and down in conjunction with the rear end of the chain frame 24.

  The guide sprockets 31, 31... Of the feeding portion are arranged in a straight line in the front-rear direction on the center line C of the feed chain 21 (FIGS. 2 and 5), and the chain is inserted through the front and rear cross members 33 b, 33 a. On a support frame 33 integral with the frame 23, each is fixed to one end of a rotating shaft 31b at the tip of a swing frame 31a that can swing up and down. Each guide sprocket 31 can be lowered toward the log material W on the feed material chain 21 via the swing frame 31a by retracting and extending a cylinder 31d connected to the rotary shaft 31b, and can be retracted high upward. . In FIG. 5, the log material W is illustrated on the rotating sprockets 41 and 41 at a position higher than the feed chain 21.

  Each of the pair of front and rear rotating sprockets 41, 41... Is mounted on a common rotating shaft 41a on the left and right sides of the feed chain 21 in the front-rear direction (FIGS. 2 and 6). The rotary shafts 41a, 41a,... Are mounted on the front, back, left and right of the upper surface of the common lifting frame 42. The front and rear rotary shafts 41a, 41a are chain-connected to a common drive shaft 41b on one side of the lifting frame 42. ing. The left and right drive shafts 41b and 41b of the elevating frame 42 are chain-coupled to a drive motor 41c at the rear end of the elevating frame 42, respectively. Thus, the rotary sprockets 41, 41,... Can rotate the log material W on the rotary sprockets 41, 41,... Around the axis by synchronously rotating in the same direction simultaneously via the drive motors 41c, 41c. Each arrow direction in FIG. 5).

  The elevating frame 42 is incorporated into the base frame 11 through front and rear cylinders (not shown) so as to be movable up and down, and is connected to the base frame 11 through front and rear swing plates 42c and 42c (FIGS. 2 and 2). 7). FIG. 7 illustrates the front end portion of the lifting frame 42.

  The front end portion and the rear end portion of the elevating frame 42 are horizontally rotatable around a vertical axis 42b standing on the plate 42b1, respectively. The plate 42b1 swings around a horizontal axis 42c2 at the upper end of the swing plate 42c. It is free to move. On the other hand, a slide plate 43 is connected to one end of the lower shaft 42c1 of the swing plate 42c so as to be relatively rotatable and immovable in the axial direction. The slide plate 43 is connected via a ball screw 43c and a drive motor 43e. The bracket 11b can be moved left and right. Therefore, the elevating frame 42 can elevate and lower the rotating sprockets 41, 41... Further, the rotating sprockets 41, 41... On the lifting frame 42 move the corresponding swinging plate 42c to the left and right via the front and rear drive motors 43e, 43e, and individually set each pair of the front and rear via the lifting frame 42. Can be shifted left and right.

  Each pair of left and right outer periphery detection sensors 50, 50... Has a pair of left and right detection rods 51, 51 symmetrically provided on both sides of the feed chain 21 (FIGS. 2, 6). Each detection rod 51 is mounted on the side surface of the chain frame 23 via an L-shaped bending shaft 51a and bearings 51b and 51b so as to be horizontally rotatable. The lower end of each detection rod 51 is connected to the rod of the cylinder 53 via a connecting member 51c, and the rear end of each cylinder 53 is attached to the auxiliary frame 33c via a bracket 53a so as to be horizontally rotatable. The auxiliary frame 33 c is fixed to the support frame 33 that is integral with the chain frame 23. Each cylinder 53 incorporates a sensor for measuring an expansion / contraction stroke, and the pair of detection rods 51 and 51 sandwich the log material W on the rotating sprockets 41 and 41 from the left and right (FIG. 5), thereby feeding the material. The distances a1 and a2 from the center line C of the chain 21 to the outer periphery of the log material W can be measured.

  The rotation sensor 60 is mounted on the front end of the support frame 33 (FIG. 2). The rotation sensor 60 has a rearward rotation shaft 61 attached to the tip of a swing arm 63 that swings up and down via a cylinder 63a. The rotation shaft 61 is connected to an encoder (not shown) that detects the rotation angle of the rotation shaft 61. Has been. The rotating shaft 61 can expand and contract the cylinder 63a to advance to the operating position on the center line C of the feed chain 21, and can be retracted upward from the operating position. Can be moved.

  In the laser sensor 70, three sets of laser light projecting / receiving elements 72, 72,... Are arranged at an equal angle inside a short tunnel-shaped frame 73 fixed to the attachment portions 71, 71 of the chain frame 23 (FIG. 4). ). The laser sensor 70 can collect the entire cross-sectional shape data of the log material W fed through the feed chain 21 and passing back and forth in the frame 73, for example, every 10 mm in the front-rear direction.

  The setting unit includes a base frame 12 that is long in the front and rear, a chain frame 24 for the feeding chain 21 incorporated in the base frame 12, and five sets of guide sprockets 31, 31,. A large-sized guide sprocket 32 and discharge plates 81, 81, 82, 82,... Each having four pairs of left and right pairs of the feed chain 21 arranged in the front and rear are provided (FIGS. 1 and 3).

  The chain frame 24 of the setting unit is supported so as to be movable up and down via the lifting devices 13 and 13 at the front end and the rear end of the base frame 12. The elevating device 13 at the rear end of the base frame 12 has the same configuration as the elevating device 13 of the input unit, and supports the chain frame 24 via a support shaft 13e and a cross member 34a. The lifting device 13 at the front end is the same as the lifting device 13 at the rear end except that a fixed plate 13f is fixed to the base frame 12 instead of the swinging plate 13b. The lifting device 13 at the front end supports the front end of the chain frame 24 through a casing 27 and a cross member 34b so that the chain frame 24 can be lifted and lowered. A drive motor 26 with a reduction gear 26a for driving the shaft 25 is attached.

  The chain frame 24 can individually set and control the front and rear heights via the front and rear lifting devices 13 and 13. On the other hand, the front end of the chain frame 23 of the insertion portion is interlocked with the rear end of the chain frame 24 of the setting portion, and the rear end of the former is connected to the chain frame 24 of the setting portion via the lifting device 13 at the rear end of the base frame 11. And can be controlled to maintain a straight line.

  The setting part guide sprockets 31, 31... Are mounted on a support frame 34 integral with the chain frame 24 via front and rear cross members 34b, 34a, and have the same structure as the guide sprocket 31 of the input part. However, the third guide sprocket 31 from the front is provided with a servo motor 36 for left and right movement on the swing frame 31a, and each of the first, second and fourth guide sprockets 31 from the front is a restraining brake 35. The return cylinders 35a and 35a are provided on the swing frame 31a. That is, the first to fourth guide sprockets 31 before the last part are movable to the left and right via the rotating shaft 31b (in the direction of the arrow in FIG. 8).

  Therefore, when each guide sprocket 31 is lowered to the outer periphery of the log material W on the feed chain 21 and the guide sprocket 31 having the servo motor 36 is moved left and right, the log material W can be tilted to the left and right (see FIG. 8 solid line, two-dot chain line). At this time, each guide sprocket 31 having the brake 35 releases the brake 35 in advance to follow the inclination of the log material W, and then operates the brake 35 to constrain the log material W so as to be able to feed. Further, when the guide sprocket 31 having the servo motor 36 and each guide sprocket 31 having the brake 35 are retracted upward, for example, return to the center line C of the feed chain 21 via the servo motor 36 and the cylinders 35a and 35a, respectively. Let However, the brake 35 is temporarily released when the cylinders 35a and 35a are operated.

  The large guide sprocket 32 is attached to the front end of the support frame 34 (FIG. 3), and basically has the same structure and large diameter as the other guide sprockets 31, 31. However, a drive motor 32c is mounted on the swing frame 32a, and the guide sprocket 32 is rotationally driven through the drive motor 32c so as to have the same peripheral speed as the travel speed of the feed chain 21, thereby feeding the feed chain. 21 assists the feeding of the log material W on 21.

  The four pairs of left and right discharge plates 81, 81, 82, 82, etc. are provided in the front-rear direction of the feed chain 21 on the upper surface of the common lifting frame 44. The elevating frame 44 can be moved up and down in the base frame 12 and has the same basic structure as the elevating frame 42 of the input portion. However, the lifting / lowering cylinder 44a is disposed at the center of the lifting / lowering frame 44, and the front and rear swing plates 44c and 44c are not moved left and right, so that the slide plate 43, the drive motor 43e, the vertical axis 42b, etc. in FIG. A corresponding series of members is not provided.

  The operation of the material feeding device is as shown in FIG. 9 for the input unit and the setting unit, for example. However, a control device (not shown) of the material feeding device uses a microcomputer.

  First, a predetermined initial setting operation is completed in the input unit (step (1) in FIG. 9, hereinafter simply referred to as (1)). That is, the front and rear rotary sprockets 41, 41... On the lifting frame 42 are brought into symmetrical positions on the left and right of the feeding chain 21 via the drive motors 43e, 43e before and after the lifting frame 42 and lifted via a cylinder (not shown). The frame 42 is raised, and the rotary sprockets 41, 41... On the lifting frame 42 are pushed up higher than the feed chain 21. Further, the guide sprockets 31, 31... Are retracted high upward, the detection rods 51, 51 of the outer periphery detection sensors 50, 50 of each set are opened outward and retracted, and the rotation sensor 60 is retracted upward.

  When the initial setting operation is completed (1), the log material W is put on the front and rear rotating sprockets 41, 41,.

  For example, when the log material W has a length of 3 m, the three sets of guide sprockets 31, 31... On the front side correspond to the front end portion, approximately the center, and the rear end portion of the log material W, respectively. When the log member W has a length of 4 m, the four sets of guide sprockets 31, 31... Shown in the figure correspond to positions from the front end to the rear end of the log member W, respectively. However, the last guide sprocket 31 is not used for the log material W of 3 m. On the other hand, when the log member W has a length of 3 m, the five outer peripheral detection sensors 50, 50... On the front side correspond to the positions from the front end to the rear end of the log member W, respectively. At this time, all the outer periphery detection sensors 50, 50... Correspond to the positions from the front end to the rear end of the log material W, respectively.

  When the log material W is put on the rotating sprockets 41, 41... (2), the shape data of the log material W is acquired (3). That is, the rotation sensor 60 advances the rotation shaft 61 on the center line C of the feed chain 21 to move backward, and presses the rotation shaft 61 near the center portion of the front end of the log material W. Moreover, the outer periphery detection sensors 50 and 50 of each group close the detection rods 51 and 51 via the cylinders 53 and 53, and pinch the log material W by the detection rods 51 and 51 (FIG. 5).

  Subsequently, when the log material W is rotated at least 1/2 turn by the rotating sprockets 41, 41... While the log material W is sandwiched between the detection rods 51, 51 of each set, the cross-sectional shape of the log material W at a plurality of positions in the front-rear direction is obtained. The included shape data can be acquired in correspondence with the rotation angle θ of the log material W. That is, the outer circumference detection sensors 50, 50 of each set detect changes in the distances a1, a2 from the center line C of the feed chain 21 to the outer circumference of the log material W for the entire circumference of the log material W. In addition to obtaining the cross-sectional shape of the entire circumference of the log material W, the center of gravity position Wo of the cross-sectional shape can be obtained. However, the rotation angle θ of the log material W is detected by the rotation sensor 60.

  Next, based on the shape data of the log material W, the log material W is rotationally controlled so that the front end portion and the rear end portion of the log material W are lowest (4). For example, assuming a virtual curve Woh that smoothly connects the center-of-gravity positions Wo, Wo,... Of the cross-sectional shapes at a plurality of locations of the log material W obtained by each set of outer periphery detection sensors 50, 50 (FIG. 10), May be the maximum bending direction of the log material W (arrow AA direction in the figure). Therefore, if the log material W is rotated by a predetermined angle θa so that the maximum bending direction is upward (solid line in the figure), the front end portion and the rear end portion of the log material W can be minimized. However, FIG. 10 is a schematic example of the log material W. The rotation control of the log material W is performed by opening the detection rods 51, 51 of the outer circumference detection sensors 50, 50 outward and retracting them, rotating the log material W via the rotating sprockets 41, 41. 60, the rotation angle θ = θa of the log material W is detected.

  When the rotation control of the log material W is completed (4), the rotation shaft 61 of the rotation sensor 60 is separated from the front end of the log material W and retracted upward, and then the posture control of the log material W is performed ((5), FIG. 11). However, FIGS. 11A and 11B are schematic plan views of the log material W after the rotation control is completed and after the posture control is completed, respectively, and the horizontal bending of the log material W is extremely exaggerated. It is shown.

  In the posture control, for example, the front and rear rotating sprockets 41 holding the log material W are distributed so that the horizontal bending from the front end portion to the rear end portion of the log material W is approximately evenly distributed to the left and right of the feed chain 21. , 41... Are individually shifted to the left and right. For example, when the virtual curve Woh connecting the gravity center positions Wo, Wo... Coincides on the feeding material chain 21 at both ends of the log material W (FIG. 11A), the feeding material is not included in the outer circumference of the log material W. When the front and rear ends of the log material W are shifted to the left and right by the predetermined shift amounts b1 and b2 with respect to the sawnable width W1 determined on the left and right sides of the chain 21, the same sawnable width is determined similarly. By satisfying W2> W1, it is possible to produce the log material W with a good yield.

  Thereafter, the rotary sprockets 41, 41,... Are lowered below the feed chain 21 to transfer the log material W onto the feed chain 21 (6), and a predetermined guide sprocket 31 corresponding to the length of the log material W is transferred. , 31... Are lowered and the log material W is restrained on the feed chain 21 so as to be capable of feeding (7). When the transfer of the log material W is completed (6), the front and rear rotary sprockets 41, 41... Are returned to the left-right symmetrical positions of the feed material chain 21, respectively.

  The log material W restrained on the feeding chain 21 at the feeding portion is fed forward from the feeding portion to the setting portion by moving the feeding chain 21 forward (FIG. 1). At this time, the guide sprockets 31, 31... Of the charging part are retracted upward when the rear end of the log material W passes, and the guide sprockets 31, 31. Move down. The log material W fed to the setting unit stops when the front end passes through the frontmost guide sprocket 31. At this time, the rear end of the log W passes through the rearmost guide sprocket 31 of the setting portion, and the rearmost guide sprocket 31 is retracted upward.

  At the same time as the log material W is fed from the input unit to the setting unit, the preceding log material W on the material feeding chain 21 of the setting unit is fed to the lumber machine MC. At this time, the large guide sprocket 32 descends and assists feeding when the front end of the log W passes, and the guide sprockets 31 and 32 of the setting unit move upward when the rear end of the log W passes. evacuate. Each guide sprocket 31 returns to the center line C of the feed chain 21 when retracted upward.

  When the log material W passes, the laser sensor 70 can collect the entire cross-sectional shape data of the log material W. Therefore, the microcomputer of the control device tilts the log W to the left and right on the feed chain 21 using the whole cross-sectional shape data of the collected log W based on the production plan inputted in advance. The optimal wood plan for the log W is determined (11). Thereafter, the setting unit sets the left-right inclination and the front-rear height of the log W as the sawing conditions based on the wood plan ((12), (13)), and prepares the sawing machine MC (14). Note that steps (12) to (14) in the setting unit can be executed concurrently in any order.

  The left and right inclination of the log material W is set by moving the guide sprocket 31 having the servo motor 36 to the left and right and causing each guide sprocket 31 having the brake 35 to follow (FIG. 8). However, the moving direction and the moving amount of each guide sprocket 31 are determined so that the wood cutting plan can be realized with the maximum yield by using the entire cross-sectional shape data of the log material W by the laser sensor 70.

  The setting of the front and rear heights of the log material W is also realized by using the entire cross-sectional shape data of the log material W, and realizing the wood cutting plan with the maximum yield. For example, as shown in FIG. 12 (A), the log material W set on the feed chain 21 so that the front end portion and the rear end portion are the lowest, deletes the upward convex bent portion, In order not to include the downward concave bent portion, it is possible to set the maximum sawnable range W3 by two upper and lower planes which are perpendicular to the paper surface of FIG. Accordingly, the heights Hf and Hb of the front and rear ends of the log W are determined so that the center line W3c is horizontal at a predetermined height Hc as the center line W3c in the vertical direction of the sawnable range W3 (FIG. 12). (B)). Next, the front and rear heights of the chain frame 24 for the feed chain 21 are set by the front and rear lifting devices 13 and 13 so as to realize the front and rear heights Hf and Hb of the log material W, and the chain frame 23 of the input part is set. Is set in a straight line with the chain frame 24 by setting the height of the rear end of the chain frame 23 by the elevating device 13 of the input unit.

  The preparation of the sawing machine MC is performed in such a way that the left and right cutting blades MC1 and MC1 of the sawing machine MC are positioned in order to saw the log W having the left and right inclination and the front and rear heights set according to the wood plan. The positions of the upper and lower cutting blades MC2, MC2 and the positions of cutting blades (not shown) other than the cutting blades MC1, MC2 are set (FIG. 1).

  The log material W determined to be unsuitable for sawing from the entire cross-sectional shape data by the laser sensor 70 raises the discharge guides 81, 81,. It is removed from 21 and discharged to the front side of FIG.

  In the setting unit, when the steps of setting the left and right inclination of the log material W, setting the front and back height, and preparing the sawing machine are completed ((12) to (14)), while maintaining the center line W3c of the log material W horizontally, The front and rear heights of the chain frame 24 are continuously controlled so as to maintain the height Hc constant, and at the same time, the chain frame 23 of the feeding portion is controlled in a straight line with the chain frame 24 while passing through the feed chain 21. Then, the log material W of the setting part is fed to the saw machine MC for sawing. At this time, the large guide sprocket 32 at the front end of the setting unit assists the feeding by the feeding chain 21, and the log material W in the sawing process maintains the sawing conditions set by the setting unit. Yes.

  FIG. 9 shows a temporal relationship between the order of each process in the input unit and the setting unit and the feeding period and stop period of the log material W by the feeding chain 21. Therefore, unless the input part interferes with the log material W in the preceding feeding material, the next log material W is placed on the rotating sprockets 41, 41... A part or all of the steps of the preparation method described above may be performed in advance during the feeding period of the preceding log material W.

  In the above description, when the log material W is fed from the input unit to the setting unit via the feeding chain 21, and at the same time the log material W of the setting unit is fed to the sawing machine MC for lumbering, the former log material W can be fed to the lumber machine MC at once without stopping the setting unit once. That is, the determination of the wood plan of the log W based on the overall cross-sectional shape data from the laser sensor 70, the setting of the sawing conditions including the left and right inclination of the log material W, the front and rear height based on the tree plan, A series of setting control operations in the setting unit such as preparation can be executed in parallel with the feeding operation by the feeding chain 21 without causing the setting unit to stop the log material W.

  In addition, the chain frame 23 of the input portion is set until the rear end of the log material W passes the foremost guide sprocket 31 of the input portion when feeding the log material W of the input portion to the setting portion. What is necessary is just to control the height of a rear-end part so that it may align with the chain frame 24 of a part. That is, when the rear end of the log member W of the input section passes through the frontmost guide sprocket 31 of the input section, the chain frame 23 of the input section immediately turns the rear end portion of the rotating sprocket 41 via the lifting device 13 at the rear end. , 41..., 41 is preferably lowered to prepare for the next log material W charging operation.

Other embodiments

  The outer periphery detection sensors 50, 50 of each set may be disposed only on one side of the log material W instead of being disposed on the left and right sides of the log material W. At this time, the detection rod 51 is pressed against one side of the outer periphery of the log material W, and the log material W is rotated at least once to obtain the cross-sectional shape of the entire circumference of the log material W. In addition, the detection of the outer circumference of the log material W by the detection rod 51 may use an angle sensor that detects the horizontal turning angle of the detection rod 51 in place of the sensor for detecting the expansion / contraction stroke incorporated in the cylinder 53.

  Further, each set of outer periphery detection sensors 50, 50 is replaced with a contactless linear image sensor (so-called line sensor), an area image sensor (two-dimensional image sensor), a television instead of the mechanical contact type by the detection rod 51. A camera or the like can be used. Various similar sensors can be used for the laser sensor 70 as the shape sensor.

  The present invention can be particularly suitably applied to a log material W having a bend in which it is not easy to improve the yield.

W ... log material MC ... sawing machine 21 ... feed chain 31 ... guide sprocket 41 ... rotating sprocket 50 ... outer periphery detection sensor 70 ... laser sensor

Patent Applicant Kyowa Co., Ltd.

Claims (6)

  The log material is thrown onto the rotating sprockets before and after the feeding part that is higher than the feeding chain at the left and right symmetrical positions of the feeding chain, and the log material is rotated through the rotating sprocket, and the rotation sensor and the outer circumference detection sensor. Is used to obtain shape data including the cross-sectional shape of the entire circumference of multiple locations of the log material, and based on the shape data, the log material is rotationally controlled so that the front end portion and the rear end portion of the log material are the lowest. The posture of the log is controlled so that the horizontal bending from the front end to the rear end of the log is distributed to the left and right of the feed chain, and the rotary sprocket is lowered below the feed chain to feed the log. A method for preparing a log for lumber characterized in that the log is transferred onto a chain and the log on the feed chain is restrained by a guide sprocket so as to be fed.   The log material for lumber according to claim 1, wherein when the log material is controlled to rotate, the log material is rotated via a rotating sprocket, and the rotation angle of the log material is detected by a rotation sensor. Method.   The log for lumber according to claim 1 or 2, wherein when the posture of the log is controlled, the rotary sprocket supporting the front end and the rear end of the log is shifted left and right. How to prepare.   The log material restrained on the feed chain by the method for preparing a log for lumber according to any one of claims 1 to 3 is fed from the input part to the setting part via the shape sensor, and is fed by the shape sensor. Set the sawing conditions including the left and right tilt and front / rear height of the log material of the setting part using the whole log shape data of the collected log material and prepare the sawing machine, while maintaining the sawing condition, the log sawing machine A method for sawing a log, characterized in that it is fed into a sawn lumber.   5. The method for producing a log material according to claim 4, wherein the log material of the setting part is fed to the setting unit and the log material of the setting part is fed to the sawing machine simultaneously with a common feeding chain.   6. The method for producing a log according to claim 4, wherein a part or all of the steps for preparing a log for lumber are performed during log feeding.

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