JPS58128804A - Method and device for preventing bending of material wood in veneer lathe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention The present invention provides a veneer race for cutting a wide sheet-like veneer veneer by cutting a predetermined amount into the outer circumferential surface of the raw material by cutting a blade along the entire length of the raw material into the outer circumferential surface of the raw material while holding and rotating the left and right end surfaces of the raw material. As cutting progresses, the diameter of the log becomes smaller and becomes a smaller diameter tree, so the gripping force of the spindle, etc. that grips the left and right end surfaces of the log, and the cutting resistance from the cutting blade and pressure bar cause the log to become smaller than the blade. This invention relates to a device that prevents so-called bending of raw wood, which causes a bending phenomenon in substantially the opposite direction, for example, causing unevenness in thickness in a cut veneer curved diagonally upward.

Conventionally, in cutting machines such as veneer laces that cut veneers from raw wood, multiple rollers are placed on the upper part of the cutting blade on the opposite side to sandwich the raw wood as a measure to prevent the raw wood from bending as the diameter of the raw wood becomes smaller as the cutting progresses. is set parallel to the axis of the log,
Japanese Patent Publication No. 41-14556 and Utility Model Publication No. 44-2336 have a configuration in which the roller is brought into contact with and pressurized by a fluid cylinder on the outer peripheral surface of the raw wood via a support arm.
No. 0 is known. However, these conventional devices are configured to press the raw wood unilaterally from a single direction, and therefore, the raw wood is pressed against parts that have fallen off or caved in due to cracks, rot, etc., or where the strength has partially decreased significantly. When the rollers dig into the log deeper than the outer circumference of the normal log, and when the outer circumference of the normal log continues to rotate, the rollers float forward and backward, resulting in high-speed rotary cutting. The so-called breathing phenomenon of the rollers may cause uneven pressure on the outer circumferential surface of the raw wood, or the device may be damaged due to impact caused by the advance and retreat of the rollers.Furthermore, the raw wood to be cut on the veneer race may be of different species or species. Both properties are complex and diverse, and naturally the strength against bending of the raw wood also varies widely.In other words, it is necessary to select the pressing force of the roller for the purpose of preventing bending due to the cutting resistance of the raw wood whose diameter has become smaller as the log progresses, and other factors. It becomes difficult, and if there is too little, the log will be -
If the curve is too large, the log will be bent downwards and the log will be damaged by the pressing force of the device for preventing bending of the log.Therefore, in this device, the fluid cylinder acting on the roller It is difficult to set the fluid pressure, and it is virtually impossible to select the fluid pressure that counteracts the curvature of the log in response to many types of logs.

The present invention eliminates the deficiencies of the conventional apparatus, and in order to minimize the curvature of the target raw wood and eliminate unnecessary pressure on the raw wood, a predetermined size that is very close to the outer circumferential surface of the raw wood is used. It is equipped with a roller that is kept on standby while maintaining the diameter of the log, and a variable speed electric motor and control system that moves the roller forward as the diameter of the log is reduced. It comes into contact with the roller and stops the log from further curving.

An embodiment of the present invention will be described in detail below with reference to the drawings.

Fig. 1 is a front view, and the lower parts of the left and right frames 5 are omitted.

; Figure 172 is a side view and the frame 5 in the front is omitted;
Further, the frustum lO and the pressure vanipode 20 are simply shown with imaginary lines. In the figures 1 and 2,
Reference numeral 1 denotes a log whose left and right butt end surfaces are held by spindles 2.2 and rotated in the direction of arrow A. Left and right spindles 2 and z are respectively connected to left and right frames, 5 and a bed that connects the lower part of the log. The fluid cylinders 3 and y are arranged so as to be movable forward and backward relative to the raw wood via enameled shafts 4 and 4' on frames fixedly installed at the left and right ends of the frame 6 with bolts or the like. 10 is a gun turret, which has a triangular cross section and is equipped with a blade (not shown) at the top for cutting veneer from logs; 20 is a presher bar body; a normal turret l;
A pressure bar is provided at the tip of the side facing the log, which is placed in the -L direction of O, and the left and right end faces of the turret 10 are held by a turret guide (not shown), and the arrow B is placed against the log by a feed screw or the like. It is configured so that it can be approached or separated in any direction.

Reference numeral 13 detects the position of the turret, which is installed on the turret 10, or is configured by a pulse counter or potentiometer, etc., which is mounted on the transmission shaft of the power transmission mechanism of the feed screw that moves the turret closer to or away from the raw wood. In other words, it is a device for detecting the radius of rotation of the log to be cut.

Reference numeral 80 denotes a device for preventing the bending of logs, which is an important part of the present invention, and includes a roller device 38 that is always on standby very close to the outer circumferential surface of the log being cut, and a device that prevents the swinging of the machine frame 36 of the roller and the machine frame. The swing device 30 includes a fluid cylinder 31, a roller lifting screw 39, and the like. The oscillating device No. 30 consists of the following elements.

Reference numeral 31 designates a fluid cylinder, one end of which is mounted above the left and right frame 5, one set each on the left and right, so that it can be swung by a bracket 32. Bracket 3 above 36
6', and pressure fluid such as oil or air pressure flows into the left and right cylinders 31 in equal amounts, and the piston rod 33 is synchronously attached to the left and right cylinders.
It is controlled by a fluid unit consisting of a solenoid valve and the like so that it can move forward and backward in the direction of arrow C in Figure 2. The swinging device having the above configuration is used to appropriately tilt the machine frame 36, which will be described later.

Next, the machine frame 36 is made of shaped steel etc. as shown in Fig. 1.
), the legs, connecting beams, elevating beams, etc., are framed in a U-shape, the opening of which is extended toward the spindle side of the veneer race, and the machine frame is reinforced with gazette stays, etc., as appropriate. The ends of the two legs 36A protruding into the U-shaped opening are each fitted with a pair of eyeglass-shaped metal brackets (35.35'), and the outer periphery of the enamel shaft (4.4') of the left and right frames. The tip of the piston rod 33 of the above-mentioned fluid cylinder 31 is connected by a bracket 36' in the vicinity (on the opposite side of the metal bracket length) around the axis of the spindle (common with the axis of the raw wood). The movement of the piston rod 33 in the direction of the arrow C by the operation of the swinging device 30 causes the arrow r Rotating and sliding in the opposite direction will be performed.

Reference numeral 36B is a connecting beam that connects the end portions of the legs 36A of the machine frame 36, and a variable speed electric motor 40 is installed approximately in the middle of the beam in the longitudinal direction, and bearings 39B that pivotally support the lifting screw 39 are provided on the left and right sides of the connecting beam. The bearing also allows a lifting screw 39 such as a ball screw to be connected to the spindle 2.2.
Further, 400 chain wheels are mounted on the variable speed electric motor 40, and 390 chain wheels are screwed onto each of the lifting screws 39, and are connected to each other by a chain 37. Therefore, by driving the variable speed electric motor 40, the left and right lifting screws 39 are rotated synchronously, for example, in the direction of arrow G, and the lifting screws are raised or lowered in the direction of arrow E.

36S is a lifting beam, which is attached to the left and right legs 36 of the machine frame 36.
The left and right end portions thereof are housed and held in the leg portions 36A by means of square metals (not shown), respectively, so that the leg portions can be slid in the direction of the arrow E.

Further, at the upper end of the beam 36S, there is a thrust metal 39 that pivotally supports the lower end of the lifting screw 39 so as to be freely rotatable in the direction of arrow G.
T is installed, and a plurality of sets (three sets in Figure 1) of roller devices 38 are arranged and attached on the left and right sides of the lower end.

38B moves two touch rollers 38R to a lifting beam 36S.
It is a roller bracket that is suspended from the roller bracket, and is attached near the center of its upper end to the lifting beam 36S via a fulcrum shaft 38H, and is configured to be able to swing slightly about the fulcrum shaft 38H.

Further, the touch rollers 38R are rotatably supported by the roller bracket 38B by individually contacting the outer peripheral surface of the raw wood via bearings or the like.

A plurality of sets of these roller devices 38 are arranged on the lifting beam 363 with the same configuration. Note that touch roller 3
8R may be configured to be relatively long and placed at one location in the middle of the log in the longitudinal direction. The roller devices 38 are arranged linearly on the lifting beam 36S arranged parallel to the axis of the raw wood within a range that does not deviate from the full length of the raw wood to be cut over the veneer race V.

In addition, a pipe material such as a steel pipe is used for the lifting beam 368,
Alternatively, the bracket 38B may be directly supported on the fulcrum shaft 38H of the roller bracket so as to be swingable. Further, the lifting screws 39 may be housed and disposed within the left and right legs 36A of the machine frame 36, and furthermore, a guide shaft may be erected as appropriate in the lifting beam 36S parallel to the lifting screws 39 and inside the connecting beam 36E. The beam 3
There is also a means for stably supporting the lifting beam 368 by pivoting it to 6B to prevent vibrations and the like during lifting and lowering of the lifting beam 368.

According to the above configuration, even if the lifting beam 363 is tilted at any angle in the direction of the arrow by the swinging device 30, the roller device 38 is always moved to the axis of the spindle of the veneer race V by the lifting screw 39, that is, cut. It is structured so that it is possible to proceed with careful attention to the raw wood. Reference numeral 42 is a control panel that inputs a signal corresponding to the diameter of the log in a state where no deflection or the like occurs during rotational cutting from the rotation radius detection device 13 of the log. A rotational drive signal is output to the variable speed electric motor 40 in order to keep the touch roller 38R on standby while maintaining a gap. Therefore, as the diameter of the log decreases as the cutting progresses, the roller 38R is rotated by the rotation of the lifting screw 39. It continues to descend toward the axis of the log. Of course, if cutting is interrupted midway, etc., the frustum stops, etc., and receives a signal from the rotation radius detection device 13, and then receives a signal from the control panel 42 to raise and lower. The rotation of the screw 39 is also interrupted, and the roller 38R moves back and forth in the direction of the arrow E, following the reduction in the diameter of the cut log.

To explain the embodiment of the present invention with the configuration shown in Figures 1 and 2 above, the veneer lace V is moved to the cylinder 3 by the swinging device 30 before the start of work.
The piston rod 33 of No. 1 is recessed into the cylinder 31, and the machine frame 36 is tilted to the right side in Fig. 2 (opposite inclination to the solid line in Fig. 2) and kept on standby. Next, hoist the raw woodwork. etc., then transport it to the veneer lace V, and continue to frame 5,
The spindles 2 and z are advanced toward the log side by the fluid cylinders 3 and y of DA, and the left and right end faces of the log L are gripped by the spindles, and then the hoist, etc. that carried the logs in a suspended position is separated from the logs, and then , the frustum equipped with a cutting tool is rapidly advanced toward the log in the direction of arrow B, and then the log is rotated in the direction of arrow A by a spindle, and one of the logs is
The frustum 10 is advanced by the thickness of the cut veneer relative to the rotation, and the frustum 10 is ejected by a so-called walkway. As the frustum advances, the veneer is soon cut by a cutting blade, and the diameter of the log gradually decreases as the cutting progresses. When a predetermined diameter of the log, which is set in advance on the log rotation radius detection device 13 or the control panel 42, is reached, the swinging device 30 is automatically activated and the piston rod 33 advances, tilting to the right in Figure 2. The waiting machine frame 36 begins to tilt to the left together with the lifting screw 39, etc., and the rotation radius detection device 13 of the log
The elevating screw 39 is controlled by the output signal from the control panel 42, which inputs and processes signals from the variable speed electric motor [1 machine 40. Cheno wheel 400. The roller device 38 rotates in the direction of arrow G via the chain 37 and the chain wheel 390, and the roller device 38 descends toward the axis of the log, cutting the outer peripheral surface of the log being cut (properly, the condition in which the log is not bent). 0.5-1.5m of the outer circumferential surface.
The roller device 38 stops before m, and thereafter continues to descend as the diameter of the log decreases as the cutting progresses.

Eventually, the log l, which is becoming smaller in diameter, loses its balance between the cutting resistance caused by the cutter and the pressure bar and the log strength, and the log begins to bend upward, and the outer circumferential surface of the log, which gradually curves into an arch, becomes glued to the roller device. Contact with Tsuchirolla 38H,
This will prevent any further bending of the log from occurring, and as the diameter of the log continues to decrease, the touch roller 38R will also adjust to the cutting situation step by step using the lifting screw 39 to reduce the length of the log. It descends synchronously and keeps the bending of the raw wood within 0.5 to 1.5 mm of the initially set distance between the roller 38R and the outer circumferential surface of the rotation radius of the raw wood, and the cutting is carried out to the end. Eventually, the cutting will end when the pre-set dimensions of the log are reached (usually a dimension slightly before the outer diameter of the spindle).This cutting end signal causes the left and right spindles that grip the left and right end faces of the log to finish cutting. 2
．． 2 retreats from the log, allowing the so-called stripped core log to fall naturally, and the frustum 1o equipped with a knife quickly separates from the log side, and furthermore, the machine frame 36 of the device 8o for preventing the log from bending is shaken. The piston rod 3 is moved by the operation of the moving device 30.
3 is inserted into the cylinder 31 in the direction of the arrow C to tilt it to the right in the direction of the arrow, and the elevating screw 39 is driven to rotate in the opposite direction to that when lowering, thereby moving the roller device 38 together with the elevating beam 36B in the direction of the arrow E. It is raised in the same direction, stopped at a predetermined position, and put on standby in preparation for the next log to be brought in. The above-mentioned series of operations upon arrival of the predetermined dimension are all automatically performed by the control panel 42 in response to the rotation radius detection device 13 of the raw wood described above or a signal (cutting end signal) indicating that the predetermined dimension has been reached, which is preset in the control panel 42. In addition, manual operation is also possible as needed. The above-mentioned operations are then repeated. The operation of the swinging device 30 toward the log side is described using a so-called automatic circuit that automatically tilts the swinging device according to a predetermined dimension arrival signal set in the control panel 42, but a manual push button switch can be used as appropriate depending on the cutting situation. It also has an operation function such as tilting the machine frame 36 upward to the raw wood, or releasing the prevention of wood bending and tilting it to the opposite side. Furthermore, as a special function, the lifting screw 39 is brought into contact with the outer circumferential surface of the log from the beginning, and thereafter it is made to follow the reduction of the log synchronously, and the gap between the outer circumferential surface of the log and the touch roller 38R is set to 0.
．． Another method is to set the size to a large size of 5 to 1.5- or more, and then drive the lifting screw 39 to lower the touch roller 38R in synchronization with the reduction in diameter of the log while maintaining the gap. Also, a rocking device 30 that tilts the machine frame 36
Although the explanation has been made using a fluid cylinder, it is also possible to adopt a wrap transmission device using metal brackets 35, 35', etc. by simply changing the design. It is best to use a precision and robust ball screw for the lifting screw.
Other high-precision screws, such as trapezoidal screws, may also be used.

Next, another embodiment will be explained. Figure 3 is a side view of another embodiment, and each element having the same reference numeral as the embodiment shown in Figure 'i71 and Figure 2 has the same structure as described above. It is equipped with functions.

The main difference from the above embodiment is that a swing frame 56 is provided in place of the machine frame 36 having the metal bracket shown in FIG. , swing arm 52, fluid cylinder 31. Furthermore, the tilting operation of the swing frame is performed by a swing device 3σ consisting of a bracket 32 and the like, and an angle detection device 43 and a control panel 44 are added. The details will be explained below.

3σ is a swinging device, and 31 is a fluid cylinder which is attached near the back of the upper surface of the pressure bar body 20 on the negative side by brackets 32, one set each on the left and right. The other end, that is, the tip of the piston rod 33, is directed in the direction of the arrow with the fulcrum shaft 51 supported by the arm bracket 50 disposed near the top end of the pressure bar body 20 (the side facing the tree 1) as a fulcrum. The swing arm 52 is freely rotatably connected to the tip of the swing arm 52 by a hinge pin 53, and one side of the swing frame 56 is mounted on the fulcrum shaft 51. A swinging frame 56 approaches or separates from the raw woodwork together with a lifting screw, etc., which will be described later, via the moving arm 52 and the fulcrum shaft 51.The cylinder 31 is located at the left and right ends of the pressure bar body 20. It is preferable to arrange one set of cylinders 31 nearby, but the cylinders 31 may be arranged as one set by swinging the arm brackets 50 (to be described later) by means of a fulcrum shaft 51 that is supported through the left and right arm brackets 50. Reference numeral 56 denotes a swinging frame, one end of which is pivoted so as to swing in the direction of the arrow around a fulcrum shaft 51 supported by the left and right arm brackets 50, and the other extended end is connected in a U-shape. Lifting screws 39 constituted by pole screws or the like are disposed near the distal end of each of the left and right swing frames, respectively, and are vertically supported in a substantially 90° direction. Reference numeral 40 denotes a variable speed electric motor, which is fixedly installed at a suitable position on the swing frame 56 in parallel with the lifting screw, and a chain wheel 400 is fitted and fixed to the shaft portion of the motor. Reference numeral 390 denotes a chain wheel that is screwed onto each lifting screw 39 and installed on the swing frame 56 with the movement of the lifting screw 39 in the axial direction restricted by a thrust bearing or the like, and the chain wheel 400 installed on the variable speed electric motor and the chain. 37, and the electric motor 40
The driving rotation causes the lifting screw 39 to rotate and move up and down in the direction of arrow E.

39M is a metal bracket that pivotally supports the elevating screws 39 that are installed so as to protrude from the swing frame 56. On the other hand, a thrust metal 3 is attached to the lower end of the plurality of elevating screws 39.
An elevating beam 36S is suspended via the elevating screw 9T, and simultaneously moves up and down in the direction of arrow E as the elevating screw rotates. A roller device 38 is set on the lower surface of the elevating beam.
That is, the roller placket 38B is attached to be able to swing back and forth slightly via the fulcrum shaft 38H, and the touch roller 3
8R is composed of relatively short rollers, one each in the front and rear via bearings, etc., and is freely rotatably supported by the roller bracket 38B. Multiple sets of roller devices 38 with the above configuration are hung on the veneer race. It is installed below the lifting beam 36S within a range that does not deviate from the full length of the log, and as a result, it is lifted and lowered in the direction of arrow E by the rotation of the lifting screw 39.

10 is a gun platform, 13 is a rotation radius detection device for logs having the same configuration as explained in Figure 2, and 20 is also a pressure bar body. 42 is a control panel for the variable speed electric motor 40, 43
44 is a rotation angle detection device that detects the rotation of the shaft by a pulse transmitter, potentiometer, etc. installed on the fulcrum shaft 51 via a shaft or a winding transmission device, for example, which transmits the rotation of the shaft. is a control panel 1, which includes the rotation angle detection device 43 and the log rotation radius detection device 13.
This is different from the embodiments shown in Fig. 1 and Fig. 2, in which an elevating signal is output to the control panel 42 of the elevating screw 39 in response to a signal, and the roller device 38 follows the gradual decrease in the diameter of the log. Since the rocking device 3σ is placed on the top surface of the pressure bar body 20, the gun turret 10,
The pressure bar body 20 moves forward toward the log 1 together with the swinging device 3σ, and maintains a predetermined interval (0,5
~ About 1.5+m. ), the inclination angle of the lifting screw 39 will also increase, and the roller device 38 will tend to increase its inclination toward the front side of the woodwork (the side opposite to the side facing the gun turret 10). In order to keep the inclination of the log constant with respect to the log, it is necessary to slightly lift the roller using the swinging device and lower the lifting screw 39 more than the decrease in log diameter.

In addition, when using the roller without being concerned with changes in the inclination of the roller, the lifting screw is locked and the control device 4 receives the signal from the rotation radius detection device 13 of the log using only the swinging device 3σ.
4 and the angle detection device 43 from the outer circumferential surface of the log.
．． It is sufficient to maintain a gap of 5 mm to follow the reduction in diameter of log cutting. As mentioned above, it is convenient to have a device in which the inclination of the roller device can be kept constant to follow the diameter of the log, and when it is not, the device can be selected as appropriate using, for example, a changeover switch. The former is most commonly used, and the control panels 42 and 44 control these automatic controls. Furthermore, the control panel 42
．． 44 may be used as a common control panel.

Next, in Figure 3, cylinder 31, arm bracket)
50. A rocking device 3 composed of a rocking arm 52, etc.
σ is arranged on the upper surface of the pressure bar body 20, but as another embodiment, a swinging device having the same structure as the swinging device 3σ is installed on each of the left and right frames 5 and 5 made of veneer lace. In some cases, one set is installed on either the left or right frame, and unlike the embodiment shown in Fig. 5173, the rocking device is integrated with the gun turret 10 and the pressure bar body 2o as the diameter of the log decreases. Since the roller device 38 does not move to the side, there is little need to pay attention to changes in the degree of inclination of the roller device 38 as in the former case.

In addition, in the embodiments shown in Figures 1, 2, and 3, the follow-up synchronization control of the roller device with respect to the gradual decrease in the diameter of the log as cutting progresses was mainly dependent on the signal from the rotation radius detection device 13 of the log. As a severe control method, a log rotation speed detection device (not shown) that detects the rotation speed of the spindles 2 and 1 that rotate the log (the rotation speed of the main motor that drives the spindles may also be used) using, for example, a tachometer generator or the like (not shown).

) is superimposed on the signal from the log rotation radius detection device 13 and processed by the control panel 42 to follow and synchronize with the diameter of the cut log.

According to the present invention as explained above, it is always 0.5% from the outer peripheral surface of the log.
A roller device that can freely rotate is placed at a distance of ~1.5 mm, and when the log bends slightly, the outer peripheral surface of the log comes into contact with the roller for the first time, and the excessive pressure applied to the log by the conventional device causes the log to There is no breakage or destruction of the log, and as the rollers continue to descend to prevent the log from bending as the log is being reduced, there is no shock, vibration or breathing phenomenon caused by partial depressions in the log. It exhibits the ideal effect of preventing log bending. In addition, 0.5 to 1.5
As a result of repeated various tests, it was confirmed that there was almost no actual damage to the diagonally upward bending of the log by about 1 mm, and this result could be derived.

[Brief explanation of the drawing]

Figure 1 is a front view of an embodiment of the present invention, Figure 2 is a side view with the 7I frame omitted, and Figure 3 is a side view of another embodiment with the frame omitted. 1 , , , , , , , , , , , Hara
Tree 2.2', , , , , , , , , , , Spindle 3.3/ , , , , , , , , , , ,
, , , , , ,Fluid cylinder 4.4/ , ,
, , , , , , , , , , , , , Enamel shaft 5, Da , , , , , , , , , , , 7
Ram 6 , , , , , , , , , , , , , , , , , , , , Bed 10 , , , Battery 13 ,
, , , , , , , , , , Rotation radius detection device 2
0 , , , , , . 9. ,,,, Pressure per body 30.3σ183009131939. Rocking device 31 , , , , , , , , , ,
,,, fluid cylinder )32
,,,,,,,,,,,,,,, Mounting is with bracket 35,,,,,,,,,,,,,,, Metal bracket 36,,,,,,,,,,,,, ,,,machine frame 3
6A , , , , , , , , , , Leg section 36B , , , , , , , , , , Connecting beam 36S , , , , , , , , , , Lifting Beam 38, Roller device 38H, Fulcrum
Shaft 38R, , , , , , , , 1,, touch roller 3
9 , , , , , , . 0. ,,, Lifting screw 390
．． 4009. ,,,,,,,,, Chain wheel 4
0 , , , , , , , , , , Variable speed electric motor 4
2.44 , , , , , , , , , control panel 43 ,,
,,,,,,. 9. , , Angle detection device 50 ,
,,,,,,,,,,,, Arm bracket 51
,,,,,,,,,,,,,,, fulcrum
Shaft 5g , Swing arm 53 , Hinge pin 80 Log bending prevention device V ,,,,,,,,,,,,,
More than veneer lace. Figure 2 80 Figure 3 0

Claims (1)

[Claims] 1. In a veneer race equipped with a truncated cone equipped with a blade that rotates the raw wood and cuts a veneer, and a pressure bar body equipped with a pressure bar, the signal of the rotation radius detection device of the raw wood A method for preventing bending of logs in a veneer lace, characterized by comprising a roller device that always follows the rotation radius of the log at a constant distance by an elevating screw driven by a variable speed electric motor controlled by. 2. Always move the roller device 05 to L from the rotation radius of the log.
A method for preventing bending of thick wood in a veneer lace according to claim 1, characterized in that the bending of thick wood is maintained while maintaining an interval of 5+m. 3. Bending raw wood in a veneer lace according to claim 1 or 2, wherein the lifting screw and the roller device are integrally provided so as to be tiltable by a swinging device. How to prevent it. 4. A method for preventing bending of logs in a veneer lace according to claim 3, wherein the swinging device is constituted by a fluid cylinder. 5. A method for preventing bending of logs in a veneer lace according to claim 3 or 4, wherein the swinging device is installed on the upper surface of the frame of the veneer lace. 6. The method for preventing bending of raw wood in a veneer lace according to claim 3 or 4, wherein the I-movement device is installed on the upper surface of the pressure bar body of the veneer lace. 7. The variable speed electric motor that drives the lifting screw is controlled by a control panel that processes and outputs signals from a log rotation radius detection device and a log rotation speed detection device. A method for preventing bending of raw wood in veneer lace according to any one of Item 6. 8. A veneer race that rotates raw wood to cut veneer is equipped with a frustum with a cutter attached and a pressure bar body with a pressure bar attached above the frustum, suspending multiple roller devices, and a spindle. A machine frame that rotates around the axis of the frame is provided, and a rocking device that tilts the machine frame toward the log side is installed on the frame of the plywood lace,
A lifting screw is supported on the machine frame for causing the opening device to follow the rotation radius of the raw wood at a constant distance, and a variable speed electric motor that drives the lifting screw and a signal from a rotation radius detection device for the raw wood are provided. A device for preventing bending of logs in veneer lace, characterized by comprising a control panel for controlling the variable speed electric motor. 9. A device for preventing bending of raw wood in a veneer lace according to claim 8, wherein the swinging device is constituted by a fluid cylinder. 10. A device for preventing bending of raw wood in a veneer lace according to claim 8 or 9, wherein one set of roller devices is installed in the longitudinal direction of the raw wood. 11. Adjust the roller device by 0.5 to 1 from the radius of rotation of the log.
．． The device for preventing the bending of logs in a veneer lace according to any one of claims 8 to 10, characterized in that the bending prevention device maintains a gap of 5 mm. 12. Claim t, characterized in that it is constituted by an elevating twisting pole screw for elevating and lowering the roller device.
A device for preventing bending of raw wood in a veneer lace according to any one of Items 8 to 11. 13. The variable speed electric motor that drives the lifting screw is controlled by a control panel that processes and outputs signals from a log rotation radius detection device and a log rotation speed detection device. The device for preventing bending of raw wood in a veneer lace according to any one of Items 12 or 12. 14. According to any one of claims 8 to 13, the swinging device is activated by a log rotation radius detection device or a predetermined log arrival signal preset on a control panel. A device for preventing bending of raw wood in the described veneer lace. 15. Rotating raw wood and cutting veneer = Yare
) Equipped with a gun turret with a cutter attached to it and a pressure bar body with a pressure bar attached above the turret, multiple roller devices are suspended to approach or move away from logs around the fulcrum axis of the swing device. A swinging device including a swinging frame is installed on the pressure bar body to swing the swinging frame, and a lifting screw is mounted on the swinging frame to make the roller device follow the log while maintaining a constant distance from the rotation radius of the log. A variable speed electric motor that supports the hanging shaft and drives the lifting screw, a control panel that processes the signal of the rotation angle detection device of the fulcrum shaft, and a control panel that processes the output from the control panel and the signal of the rotation radius detection device of the raw wood. A device for preventing bending of logs in veneer lace, characterized by comprising a control panel for controlling the variable speed electric motor and/or the swinging device. 16. The device for preventing bending of logs in a veneer lace according to claim 15, characterized in that a swinging device for swinging the swinging frame is installed on the frame of the veneer lace. 17. A device for preventing bending of logs in a veneer lace according to claim 15 or 16, wherein the swinging device is constituted by a fluid cylinder. 18. Claims 15 to 17 are characterized in that one set of roller devices is installed in the longitudinal direction of the log.
A device for preventing bending of raw wood in a veneer lace according to any one of the above items. 19. Adjust the roller device by 0.5 to 1 from the radius of rotation of the log.
．． The device for preventing bending of raw wood in a veneer lace according to any one of claims 15 to 18, characterized in that the device follows the curve while maintaining a gap of 5 mm. 20. The device for preventing bending of logs in a veneer lace according to any one of claims 15 to 19, wherein the lifting screw for lifting and lowering the roller device is constituted by a ball screw. 21. Claims 15 to 2 are characterized in that the variable speed electric motor and/or swinging device that drives the lifting screw are controlled by taking into account the signal from the log rotation speed detection device.
A device for preventing bending of raw wood in a veneer lace according to any one of Item 0. 22. The swinging device is characterized in that it is activated by a rotation radius detection device for logs or a predetermined log diameter reaching signal set in advance on a control panel.Which of Claims 15 to 21 falls under paragraph 1? A device for preventing bending of raw wood in the described veneer lace. (Margin below)