JP4181366B2 - Bending material sawing method and sawing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lumbering method and a lumbering apparatus for lumbering lumber that has been flattened from both sides of a bent material to a bent material with a high yield.
[0002]
[Prior art]
Due to the mountainous topography and climate of Japan, it is inevitable that a large amount of bentwood is included in domestic timber. However, if this bending material is processed into a straight square material (including a plate material), the amount of waste material that is wasted increases, which is too expensive and uneconomical. For this reason, bentwood has a low log unit price and does not generate transportation costs, and is often left behind in the mountains without being effectively used after being cut down.
[0003]
On the other hand, the yield is improved if the bent wood is bent and ground along the bend, and the plate material that is ground according to the bend from the bent and ground square is ground straight if the bend is corrected and straightened. those in inferior not square timber (including a sheet material) has been known that are obtained, et al. However, in order to bend and grind the bending material, both sides of the large bending side are placed on the table with the upper and lower sides facing up and down, and the sawed surface turns the bending direction of the bending material by the hands of multiple experienced workers. It was necessary to send the bending material to the saw blade while tilting it so that it was almost parallel to the blade.
[0004]
By the way, in order to bend the bending material, it is inefficient and the work of feeding the bending material to the saw machine while operating it manually is inefficient, and the sawed surface can be corrected to a direct material in the subsequent process Making a curved surface is a very difficult task requiring accuracy. Therefore, in order to solve these problems, automation of turning and grinding has been promoted, which enables turning and grinding without requiring a skilled person and can greatly reduce labor.
[0005]
[Patent Document 1]
The automatic bending and grinding method and apparatus described in Japanese Patent No. 2978473 discloses a bending and grinding apparatus that supports the bending material so as to be tiltable and feeds it to a sawing machine, and a desired grinding wire that the bending material is curved on the grinding road. It is composed of a controller that commands tilting of the bending material so as to be inscribed. This bend grinder is provided with an advancing / retracting plate that can move in a direction substantially perpendicular to the advancing / retreating direction of the feeding vehicle at two locations on the feeding vehicle that can advance / retreat toward the sawing machine. A pair of wooden grips are provided at the tip of the swinging plate that can swing with respect to the provided spindle, and both ends of the linkage are pivotally attached to two wooden grips. It is equipped with a structure that links the movements.
[0006]
However, the following problems remain in this automatic bending method and apparatus.
(1) Every time one rounding process is completed, the next rounding process cannot be performed unless the bending machine is retracted, so that productivity does not increase.
(2) Since this apparatus holds one side surface of the bending material, both sides of the bending material cannot be bent and ground simultaneously.
In addition, if the bent material is made from one direction, the balance of the balance becomes out of order, which causes a problem that the remaining material is warped, and is not suitable for grinding.
(3) Since the wooden grip has a structure for gripping one side surface of the bending material, the gripping force is weak and it is difficult to grip a heavy bending material.
(4) Since a large moment based on the weight of the bending material is added to the movable and swingable structure of the wooden handle, it is difficult to operate smoothly and it is difficult to obtain a desired ground wire with high accuracy. It is.
[0007]
[Problems to be solved by the invention]
The present invention aims to solve the above-mentioned problems, and even after finishing one round of grinding, the next rounding can be performed continuously, and both sides of the bending material are simultaneously ground. Therefore, an object of the present invention is to provide a bending material making method and an apparatus for producing a bent material capable of producing a machined surface having high accuracy on both sides with high accuracy.
[0008]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the bending material sawing method of the present invention is a method of sawing into a square material a Thai material that has been flattened on both sides facing each other as shown in claim 1. , By measuring the surface shape of the Tyco material by a plurality of sensors and recognizing the overall shape, calculating a target lumber trajectory suitable for maximizing the yield rate of the square material based on the recognition, The feeding posture of the Tyco material is controlled so that the axis of the Tyco material passing through the intermediate average position of the target sawing locus passes straight through the center position of the saw machine, and the band saw follows the target sawing locus of the Tyco material. Furthermore, the movement and rotation of the saw machine in a direction crossing the feeding direction of the timber is controlled.
[0009]
In the bending material manufacturing method configured as described above, information obtained by measuring the shape of the raw surface of the Tyco material with a sensor is sent to the controller, and the controller that receives this information recognizes the bending material shape. Sawmill movement control and rotation control of the direction of the sawing machine are performed in synchronization with the straight feed of the bending material, and the bending material is automatically fed while straightening the bending material. The best bend can be ground.
[0010]
In the above bending material manufacturing method, as shown in claim 2, the sensor uses a measuring device that detects the surface position of the Thai material by a laser beam, and the controller uses a scanning measurement result of the surface of the Thai material. From this, it is preferable to recognize the cross-sectional shape of the Thai material and calculate the target sawing locus.
[0011]
According to the configuration of the second aspect, the laser beam sensor can accurately measure the shape of the surface of the Tyco material, so that not only the curvature of the Tyco material but also the shape of the unprocessed surface can be measured with high accuracy. The controller that has received the measurement value can recognize the exact ground line to be bent and can accurately know the maximum width of the bending material that can be sawed.
[0012]
As shown in claim 3, a sawing apparatus capable of carrying out the bending material sawing method includes a plurality of sensors for measuring the surface position of the Thai material and a device for moving the Thai material relative to the sensor. And a saw machine having a pair of band saws that can move laterally in a direction crossing the feeding direction of the Tyco material and that can rotate the direction of the saw, and the Tyco A linear feed device provided with a feed conveyor for feeding the material toward the saw machine, and calculating a target lumber trajectory suitable for maximizing the yield rate of the square bar based on the recognition of the shape recognition device, The feeding posture of the Tyco material on the linear feed device is controlled so that the axis of the Tyco material passing through the intermediate average position of the target sawing locus passes straight through the center position of the saw machine, and the band saw further controls the Tyco material Lateral movement of the saw to follow the target sawing locus Constituting include a controller for controlling the rotation.
[0013]
The bending material sawing device according to claim 3 moves the tyco material relative to the plurality of sensors, so that the position and surface shape of a plurality of locations of the tyco material can be measured quickly and accurately, and the controller Calculates the target sawing locus and cutting position of the Thai material from this measured value, and outputs a signal for controlling the operation of the band saw in a timely manner. Then, when the feeding conveyor on which the bending material is placed advances straight toward the sawing machine, the sawing machine that has received the command moves and rotates in accordance with the target sawing locus to bend and grind the bending material. As a result, the feed conveyor, each ending bending sawing, it is possible to accept the next bending member, it can be efficiently continuously automatically lumber Tyco material.
[0014]
According to the bending material sawing device of the present invention, as shown in claim 4, the linear feed device is preferably provided with an adjustment stopper for adjusting the posture of the Tyco material on the feeding conveyor. , Tyco material placed on the feed conveyor of the rectilinear feeder, so as not to cause errors in attitude as it is fed towards the sawing machine, the exact position is adjusted, Tyco material target timber It is accurately ground processed according locus and the cutting position.
[0015]
As shown in claim 5, the bending material sawing apparatus of the present invention is preferably provided with a pressing roller that presses the Tyco material against the placement surface of the feeding conveyor. By adding this configuration, the Tyco material is securely fixed on the feed conveyor, so there will be no misalignment or vibration during feeding of the feed conveyor or cutting of the saw machine. It is possible to perform the turning and grinding accurately.
[0016]
As shown in claim 6, the sawing machine of the bending material sawing apparatus of the present invention can be finely adjusted with respect to each other on a platform that can be moved and rotated laterally with respect to the feeding direction of the Tyco material. It is preferable to provide a pair of band saw machines. By comprising in this way, the width | variety dimension of the square bar obtained by making fine adjustment of the space | interval of a pair of band saw machine and making a bending material can be set correctly. In addition, since the lateral movement amount and the rotation angle of the pair of band saw machines are always equal, the curved surfaces can be maintained in parallel without any deviation.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to specific examples of the drawings.
1 to 11 are drawings showing a bending material sawing apparatus according to the present invention, and FIG. 12 is a drawing showing an order of a bending material manufacturing method. FIG. 13 is a perspective view for explaining the sensor measurement position of the Thai material, FIG. 14 is a drawing for explaining the measurement method by the sensor, and FIG. 15 is a drawing for explaining the cutting position of the Thai material.
[0018]
As shown in FIG. 1, the bending material sawing apparatus of the present invention bends the shape recognition device A for measuring the shape of the Tyco material W while placing the Tyco material W and moving it in the lateral direction. A sawing machine B to be ground, a linear feed device C for feeding the timber material W toward the sawing machine B, an unloading device D for unloading the back plate separated from the bent and ground bending material to the rear of the sawing machine B, and a shape In response to the information from the recognition device A, the bend grinding position by the saw blade B, that is, the target lumber trajectory and the cutting position are calculated, and the controller E that automatically controls each device and the start and end of automatic operation are instructed. It is constituted by a control panel F.
[0019]
The shape recognizing apparatus A is provided with two chain conveyors 1 that are parallel to each other and mounted on the drive shaft 2 of the chain conveyor 1 so that both ends of the Tyco material W are placed and laterally fed toward the linear feed apparatus C. The rotary encoder 3 is configured to detect the transport amount of the Tyco material W in units of 0.5 mm. In addition, a plurality of upper laser sensors 4 and lower laser sensors 5 ( seven cases are shown in FIG. 3) are disposed above and below the chain conveyor 1 (see FIGS. 2 and 3). , Each is configured to be able to detect the surface position of the Thai material W.
[0020]
In the present invention, the upper laser sensor 4 and the lower laser sensor 5 are fixed, and the shape of the surface of the Tyco material W is measured while moving the Tyco material W. However, the Tyco material W is fixed. Even if the upper laser sensor 4 and the lower laser sensor 5 are moved, the shape of the surface of the Tyco material W can be measured in exactly the same manner.
[0021]
A first stopper 7 is pivotally attached to the support shaft 6 provided below the chain conveyor 1, and the first stopper 7 can be projected and retracted in the lateral feed path of the Thai material W by the operation of the air cylinder 8. ing. And the Thai material W can be temporarily stopped before passing both the laser sensors 4 and 5 for measuring the shape of the surface (refer FIG. 4). Further, a second stopper 10 is also pivotally attached to the support shaft 9 provided below the chain conveyor 1, and the second stopper 10 can be projected and retracted in the lateral feed path of the Thai material W by the operation of the air cylinder 11. It has become. Then, the Tyco material W after passing through both the laser sensors 4 and 5 can be temporarily stopped and put on standby.
[0022]
A transfer conveyor 14 for supplying the Thai material W to the feeding conveyor 13 of the linear feed device C is provided at the carry-out end of the chain conveyor 1 (see FIGS. 1 and 4). This transfer conveyor 14 is composed of a two-row chain conveyor, and can move up and down by a small amount. Therefore, the transfer material 14 descends after feeding the Thai material W onto the feeding conveyor 13 to supply the Thai material W. It can be placed on the feed conveyor 13.
[0023]
The feed conveyor 13 feeds the Thai material W toward the sawing machine B, and is an endless chain of multiple strips (showing 5 strips in FIG. 7) wound around the drive sprocket 15 and the driven sprocket 16. 17. The feed conveyor 13, to avoid interference with said transfer conveyor 14 intersecting thereto are bisected longitudinally, the first disposed on the inner side of the chain conveyor Nijo transfer conveyor 14 a feed conveyor 13a, a second feed conveyor 13b disposed between the transfer conveyor 14 and Nokoban B, an endless chain 13c which transmits the rotation of the first feed conveyor 13a to the second feed conveyor 13b (See FIG. 6).
[0024]
Tyco material W on the transfer conveyor 14, before being transferred to the feed conveyor 13, the front and the two pairs of adjustment stopper 18 provided in the rear, is corrected position and orientation of the first feed conveyor 13a It is . This adjustment stopper 18 is configured in the same manner as the first stopper 7 described above, and is provided so as to be able to protrude and retract on both sides near the end of the transfer conveyor 14, and is parallel to the transfer conveyor 14 by the hydraulic cylinder 12. And the set position can be adjusted (see FIG. 5). Accordingly, the paper setting position of the two sets of adjustment stopper 18 is adjusted based on a command from the controller E, the position and orientation of the drum member W to be transferred to the feed conveyor 13, the sawing machine B to be described later It is possible to obtain an optimum state for sending.
[0025]
A plurality of (three in FIG. 6) press rollers 19 are disposed above the feeding conveyor 13. The presser roller 19 includes a lever 22 having one end pivotally attached to the support shaft 20 and a roller 21 rotatably provided at the other end, and a cylinder 23 that drives the lever 22, and receives a command from the controller E. Then, the Tyco material W placed on the feeding conveyor 13 is pressed downward (see FIG. 6).
[0026]
The endless chain 17 of the feed conveyor 13 is formed with a large number of triangular projections 24 projecting toward the conveyance surface (see FIG. 8), and the projections 24 are formed when the Tyco material W is placed on the feed conveyor 13. When the pressing roller 19 presses against the bottom surface of the tie material W and the pressing roller 19 presses the tie material W, the protrusion 24 bites into the bottom surface of the tie material W. The protrusion 24 and the presser roller 19 are used to securely fix the Tyco material W on the feeding conveyor 13 so as not to shake or slip, and the protrusion 24 bites into the surface of the Tyco material W during sawing. However, since the protrusions 24 are extremely small, scars do not disappear with time on the surface of the Thai material W which is a raw material rich in elasticity, and there is no problem in the quality of the bent material produced.
[0027]
As shown in FIGS. 9 and 10, the structure of the saw machine B that bends and grinds the Tyco material W is such that a screw shaft 27 is supported by a plurality of bearings 26 provided on the upper surface of the base 25, and the screw shaft 27 Are driven to rotate by a servo motor 28. Further, since a nut 30 that is screwed onto the screw shaft 27 is fixed to the lower surface of the lateral movement table 29, the lateral movement table 29 is laterally moved (feeding of the Tyco material W) when the servo motor 28 is rotated forward and backward. It moves in a direction perpendicular to the direction).
[0028]
The pivot 31 that stands on the upper surface of the lateral movement table 29 is provided with a rotation table 32 so as to be rotatable. The servo motor 33 fixed on the lateral movement table 29 is driven through a kind of universal joint. It is transmitted to the screw shaft 34. The spherical bearing 35 provided at the end of the turntable 32 is supported by a nut that is screwed onto the screw shaft 34, so that the turntable 32 supports the pivot 31 by driving the servomotor 33. Will be rotated.
[0029]
A pair of band saws 36, 36 are provided on the upper surface of the turntable 32 so as to be swingable in the lateral direction (perpendicular to the feeding direction of the tycoon W). A servo motor 39 is connected to the end of a screw shaft 38 supported by a plurality of bearings 37 (only one bearing 37 is shown in FIG. 10) provided on the upper surface of the lateral movement table 29. The screw shaft 38 has a right-hand thread on one side and a left-hand thread on the other side, and is secured to the lower surfaces of the pair of band saws 36 and 36 at the right and left thread portions. The female threads are engaged with each other. Therefore, when the servo motor 39 is rotated forward and backward, the distance between the pair of band saw machines 36 and 36 is enlarged or reduced.
[0030]
In the saw machine B having the above-described configuration, the carry-in side sensor 40 that detects that the tip of the Tyco material W has approached the band saw machine 36 and the rear end of the square material after the sawing are provided with the band saw machine 36. A carry-out side sensor 41 for detecting that the passage has been completed is provided (see FIG. 1). These carry-in side and carry-out side sensors 40 and 41 are each composed of a pair of light projecting and receiving devices, and detect the presence or absence of the Tyco material W on the carrying surface.
[0031]
Out device D includes a chain conveyor 42 for unloading the square timber after being ground bending, is constituted by a back plate carrying-out running pallet 43 is found on both sides of the chain conveyor 42 (see FIGS. 1 and 11) . The chain conveyor 42 is composed of a plurality of endless chains wound around a drive sprocket and a driven sprocket provided on the conveyor base 44 (in FIG. 11, two cases are shown). On the upper side, a presser roller 19 is provided as in the case of the linear feed device C, and a protrusion similar to the protrusion 24 of the endless chain 17 is provided on the conveying surface of the chain conveyor 42.
[0032]
Backboard unloading Running pallet 43, the slidingly rail 45 provided et the on both sides of the frame 44, respectively carriage 46 is provided so as to be slidingly, by a drive unit (not shown), the carriage 46 is Cheng conveyor 42 It is designed to reciprocate in parallel. A fulcrum pin 47 is provided on the upper part of the carriage 46, one end of the tilting plate 48 is pivotally attached to the fulcrum pin 47, and an end of a cylinder rod 49 is pivotally attached to an intermediate portion of the tilting plate 48. (See FIG. 11). When the cylinder rod 49 is extended, the tilting plate 48 is held almost horizontally, and when the cylinder rod 49 is shortened, the tilting plate 48 is tilted to a downwardly inclined position 48 'shown by a chain line.
[0033]
Using the bent material sawing apparatus of the present invention configured as described above, when manufacturing the Tyco material, the state is obtained by placing the Tyco material W on the shape recognition device A of the bent material sawing apparatus. First, when the automatic start button on the operation panel F is first pressed, the automatic operation starts as shown in FIG. 12 (step S1). That is, the chain conveyor 1 of the shape recognizing device A rotates, and the Tyco material W on the chain conveyor 1 is conveyed toward the linear feed device C. Then, since the first stopper 7 protrudes into the conveyance path by the operation of the air cylinder 8, the Tyco material W stops before the upper and lower laser sensors 4 and 5 .
[0034]
When the preparation for performing shape recognition by the upper laser sensor 4 is ready, the first stopper 7 is retracted downward, the conveyance of Tyco material W is started. At this time, the rotary encoder 3 starts to count the conveyance amount of the Tyco material W in units of 0.5 mm, and the upper laser sensor 4 synchronizes with the rotary encoder 3 from the time when the Tyco material W is detected. The upper half surface is measured, and as shown in FIG. 14, the measurement points P ₁ , P ₂ , P ₃ ... Of the upper half portion of the surface of the Tyco material W are obtained, and the shape of the upper half portion of the Tyco material W is obtained. Recognize
[0035]
The lower laser sensor 5 is located at a position shifted from the measurement position of the upper laser sensor 4 in order to avoid interference with the upper laser sensor 4 (see FIG. 2). Recognize the shape of the lower half of W. Then, the contour shape of the cross section of the Thai material W can be recognized numerically (step S2).
[0036]
FIG. 13 shows the shape recognition positions by the upper and lower laser sensors 4 and 5 by dotted lines. When the Tyco material W is 4 m long, the measurement is performed at 9 positions and at 7 positions in the case of the 3 m material. It is appropriate, and the degree of curvature of the Tyco material W can be obtained from the measurement results obtained by the plurality of laser sensors. Further, since the contour shape of the cross section of the Thai material W can be recognized throughout, as shown in FIG. 15, not the A1 position and B2 position where the black skin remains but the A2 position and B1 position which are accurate cutting positions. You can choose. On the other hand, the controller E recognizes the cutting position that maximizes the yield rate of the square material to be ground from the Tyco material W, the target sawing locus that can be most efficiently ground, The axis position of the Thai material W passing through the intermediate average position of the target sawing locus is calculated and stored (step S3) . As described later, the transfer position of the Thai material W on the feeding conveyor 13 and the sawing are controlled. The control of the posture, the distance between the pair of band saw machines 36, the lateral movement, the control of the rotation angle of the band saw, and the like are performed according to a control output signal that matches the target lumber trajectory of the controller E.
[0037]
The Thai material W whose shape has been recognized in this way is temporarily stopped by the second stopper 10, but when the feeding conveyor 13 is in an acceptable state, the second stopper 10 moves to the retracted position, It is transferred onto the feed conveyor 13 by the transfer conveyor 14. At this time, the transfer position of the Tyco material W is regulated by the adjustment stopper 18, and the optimal sawing posture on the feeding conveyor 13, that is, the posture where the above-described axis position passes through the center of the saw blade B (step S4). . The Tyco material W whose position has been controlled on the feeding conveyor 13 is pressed by the presser roller 19 and is fixed by the protrusion 24 of the feeding conveyor 13 and waits for feeding to the sawing machine B. .
[0038]
Next, when the feeding conveyor 13 operates, the Tyco material W is fed straight toward the sawing board B while maintaining the posture on the feeding conveyor 13, and when the Tyco material W reaches the carry-in side sensor 40, The band saw machine 36 starts operation. The distance between the pair of band saw machines 36 is adjusted based on the cutting width of the Tyco material W, and in accordance with a control output signal that matches the target lumber trajectory of the controller E, lateral movement and rotation that changes the direction of the band saw are performed. , Tyco material W while being sawn into square timber (step S5), and is carried out by Chen conveyor 42 of the unloading device D.
[0039]
The back plate that has been sawed by the saw machine B and separated from the bent material falls onto the running pallet 43 for carrying out the back plate traveling in the same direction on both the left and right sides of the chain conveyor 42, and the products of the square and the back plate are obtained. separation is performed automatically (step S6). When the running pallet 43 moves to a predetermined position, the tilting plate 48 tilts downward and releases the back plate.
[0040]
When the end of the square bar sawed in this way passes the carry-out side sensor 41, the saw machine B, the linear feed device C, and the carry-out device D are stopped, and one cycle of the automatic lumbering operation of the bent material is completed (step) S7).
[0041]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
(1) In the conventional bend and grinder, the bend and grinder is retracted every time when one bend and grind is completed. However, the bent material sawing method and saw mill of the present invention can be continuously ground. So it is efficient.
(2) Since both side surfaces of the bending material are processed simultaneously, the processing distortion does not occur in the Tyco material, and highly accurate lumbering can be performed.
(3) Since the bending method and the sawing apparatus of the present invention are excellent in the function of maintaining the posture of the Tyco material of the linear feed device that feeds the Tyco material toward the saw, the highly accurate sawing It can be performed.
(4) The bending material sawing method and the saw sawing apparatus of the present invention automatically measure the shape of the Tyco material and output the control so as to match the sawing position and the target sawing locus calculated based on the shape recognition. since the operation in accordance with signals proceed et be, automatically the high lumber precision, it can be carried out continuously, efficiently.
[Brief description of the drawings]
FIG. 1 is a plan view of an entire bent material sawing apparatus according to the present invention.
FIG. 2 is a side view of a sensor of the shape recognition device.
FIG. 3 is a front view of a sensor of the shape recognition device.
FIG. 4 is a side view of a conveyor of the shape recognition device.
FIG. 5 is a partially enlarged view of FIG. 4;
FIG. 6 is a side view of the linear feed device.
FIG. 7 is a plan view of the linear feed device.
FIG. 8 is a front view of a protrusion provided on an endless chain of the linear feed device.
FIG. 9 is a plan view of the saw.
FIG. 10 is a front view of a saw machine.
FIG. 11 is a front view showing a main part of the carry-out device.
FIG. 12 is a diagram for explaining the order of the bending material manufacturing method of the present invention.
FIG. 13 is a perspective view for explaining a measurement position of a Thai material.
FIG. 14 is a diagram illustrating a method for measuring the shape of a Thai material.
FIG. 15 is a cross-sectional view for explaining a cutting position of a Thai material.
[Explanation of symbols]
W Tyco material A Shape recognition device B Sawboard C Straight feed device D Unloader E Controller F Operation panel 1 Chain conveyor 3 Rotary encoder 4 Upper laser sensor 5 Lower laser sensor 7 First stopper 10 Second stopper 13 Feeding conveyor 14 Transfer conveyor 17 Endless chain 18 Adjustment stopper 19 Pressing roller 24 Protrusion 25 Base 29 Horizontal movement table 32 Rotating table 36 A pair of band saws 40 Loading side sensor 41 Loading side sensor 42 Chain conveyor 43 Back plate carrying running pallet 46 Reciprocating table 48 Tilt plate

Claims (6)

It is a method of sawing into a square bar, which is obtained by flattening the opposite side surfaces of the bending material into a square bar, measuring the surface shape of the Tyco bar with a plurality of sensors and recognizing the overall shape, and based on the recognition The controller calculates a sawmill trajectory suitable for maximizing the yield rate of the timber and the axis position of the Thai wood that passes through the intermediate average position of the target sawmill trajectory , the controller based on the result of the calculation, The feeding position of the timber is controlled so that the axis position passes straight through the center position of the saw, and the band saw intersects the feeding direction of the timber so that the saw blade follows the target sawing locus of the timber. A method for producing a bent material, characterized by controlling the movement and rotation of the saw in the direction of turning.   The sensor is a measuring device that detects a surface position of a Thai material by a laser beam, and the controller recognizes a cross-sectional shape of the Thai material from a scanning measurement result of the surface of the Thai material by the sensor, and the target 2. A method for producing a bent material according to claim 1, wherein a lumber locus is calculated.   A shape recognizing device comprising a plurality of sensors for measuring the surface position of the Thai material and a device for moving the Thai material relative to the sensor, and capable of lateral movement in a direction intersecting the feeding direction of the Thai material. A saw machine provided with a pair of band saws that can rotate the direction of the saw, a linear feed device provided with a feed conveyor for feeding the Tyco material toward the saw machine, and the shape recognition Based on the recognition of the device, a target sawing trajectory suitable for maximizing the yield rate of the square bar is calculated, and the axis of the Thai material passing through the intermediate average position of the target sawing trajectory passes straight through the center position of the saw. And a controller for controlling the lateral movement and rotation of the saw blade so that the band saw follows the target lumber trajectory of the Tyco material. Bending material sawing equipment characterized by comprising:   4. The bending material sawing apparatus according to claim 3, wherein the linear feed device is provided with an adjustment stopper for adjusting the attitude of the Thai material on the feeding conveyor. 5. The bending material manufacturing apparatus according to claim 3, wherein the linear feed device is provided with a pressing roller that presses a Thai material against a placement surface of the feeding conveyor.   The sawing machine is characterized in that a pair of sawing machines are provided on a base plate that can be moved and rotated laterally with respect to the feeding direction of the timber, and the distance between them can be finely adjusted. Item 6. A bending material sawing apparatus according to any one of Items 3 to 5.

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