JPS5890904A - Method and device for cutting 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 (Object of the Invention) The present invention relates to a method and apparatus for cutting raw wood for veneer lace.

The first object of the present invention is to improve the yield of raw wood by making it possible to efficiently cut not only logs with an almost perfect circular cross section, but also logs with a non-perfect circular cross section into fine pieces. The second objective is to make effective use of logs, and the second purpose is to have the centering mechanism for centering the logs and the outer periphery drive mechanism for supplying driving force from the outer periphery of the logs, so that the equipment can be used effectively. The third purpose is to simplify the configuration, and the third purpose is to improve the operating efficiency of the veneer lace and improve the productivity by automating the cutting preparation process and the cutting process of raw wood.

(Prior art) When cutting logs using conventional veneer laces, there are two methods of supplying driving force to the log: one is to supply all of the driving force from the main shaft, and the other is to supply the driving force from both the main shaft and the outer periphery of the log. There is.

In the former method, where all of the driving force is supplied from the main shaft, the driving force is supplied centrally from both end faces of the log through the chuck, which necessitates increasing the diameter of the chuck. The diameter of the chuck is relatively large, ranging from 150 mm to 300 mm, which not only results in a poor log yield, but also causes excessive torque to be applied to the center of the log, which may cause the chuck to spin idle, or if the diameter of the log becomes small. There was a problem in which core cracks occurred in the raw wood, making it impossible to cut smoothly.

In addition, in the latter method of supplying driving force from both the main shaft and the outer periphery of the log, the driving force is supplied from only one point on the outer periphery, so force is continuously applied in one direction to the log. Because of this, the logs are cut with an unbalanced load, making it impossible to cut smoothly.Also, since the driving force is supplied from only one point on the outer circumference, it is difficult to cut from the main shaft. As a result, the diameter of the chuck became large, and similarly to the former case, the diameter of the stripped core of the raw wood was relatively large, resulting in a poor yield of raw wood.

Furthermore, in both methods, both end faces of the log are supported by both chucks attached to both main shafts, and the outside of the log /i!
Since the log is not supported at all from the J side, the sudden force that occurs during cutting causes the axial center position of the log to move, and as a result, the position [relationship] between the fineness of the log and the tip of the cutter changes. do,
There were problems such as not being able to cut smoothly and, in turn, not being able to obtain high quality veneer veneers.

On the other hand, in conventional veneer lace, supplying raw wood to veneer lace, centering, chucking, cutting,
Each process, such as carrying out the peeled core, is not carried out continuously and quickly, and as a result, the veneer lace has poor operating performance, and it takes a lot of time, especially for centering logs with non-round cross sections. Ta.

(Structure of the Invention) With the above-mentioned circumstances as a background, the present invention aims to increase the yield of raw wood by cutting not only logs with an almost perfect circle cross section but also logs with a non-perfect circle cross section into fine pieces with high efficiency. This was done with the main purpose of improving the cross-section of the log, and its gist is that when the cross section is almost a perfect circle, the log is placed between the two chucks of the veneer lace, and the line connecting the two chucks is approximately The logs are temporarily held by a log holding member placed below, and then held equidistantly from the axis of the main spindle, and are configured to move toward and away from the axis of the main spindle in synchronization with each other. At least three M'mJm rollers that also serve as centering are moved closer to the axis of the main shaft to suppress the outer peripheral surface of the log held by the log holding member, thereby centering the log. Then, clamp both sides of the log with chucks, drive an appropriate number of the drive rollers that also serve as centering in this state, supply driving force from the outside of the log, and remove the log from the chuck as necessary. The method involves rotating the log by supplying a driving force, and gradually moving the driving roller, which also serves as centering, against the outer circumferential surface of the log so as to approach the axis of the main shaft, and cutting the log. For logs with a non-perfect circular cross section, after centering the log with a driving roller that also serves as centering, clamp both end faces of the log with large diameter chucks, and then use the driving roller that also serves as centering. Separated from the outer circumferential surface of the log, and in this state, the large-diameter chuck supplies driving force to roughly cut the log whose cross section is not a perfect circle until the cross section becomes almost a perfect circle, and then the centering tool is also used. The driving roller is again moved close to the axis of the main shaft to agitate and press the outer circumferential surface of the front i'2 log, which has been roughly cut to a perfect circle in cross section, and then the large diameter chuck is moved back. Then, both end faces of the raw wood are clamped again using only diameter chucks, and thereafter, the cross section is cut in the same manner as the raw wood whose cross section is approximately a perfect circle.Examples will be described below with reference to the accompanying drawings.

(9) First, a cutting device for cutting logs with a nearly perfect circular cross section will be described.

In Figs. 1 to 7, in order to center the raw wood with a nearly perfect circular cross section on each headstock l provided on both sides of the veneer race L, and to supply driving force from the outer periphery of the raw wood W. Attach the outer periphery drive mechanism A that also serves as the centering groove.

Next, the outer RI drive mechanism A which also serves as this separate centering tank will be explained. In addition, since the configuration of each outer peripheral drive mechanism A attached to each headstock 1 is the same, one of the main spindles f11
I will only explain about.

At a predetermined position f on the circumference of the spindle 2 of the headstock 1 and having the required diameter, the rotation shafts 3, 4.5 of the three hollow stations are placed with their axes horizontal, and the bearings 6, 7.8 is rotatably supported, and a protrusion 9 with a circular cross section whose axis coincides with the main shaft 2 is provided on the outer side of the headstock 1, and a turning gear 11 is connected to this protrusion 9 via a bearing 10. Sector gears 12, 13.14 having the same pitch diameter are fitted on the outer ends of the respective rotation shafts 3, 4.5, so as to be rotatable in a vertical plane.
are fixed via keys 15, 16, 17, and each sector gear 12, 13, 14 and the turning gear 11 are meshed with each other.

Further, the rotation shafts 3 and 4 are provided with driving rollers 3, which will be described later.
Transmission shafts 18 and 19 for transmitting driving force are inserted through the shafts 6 and 46, and both ends are rotatably supported by bearings 20 and 21. An intermediate chain gear 22 is attached to the outer end of each transmission shaft 18,19.
．． 23 is fitted and fixed, and each transmission shaft 18.19
Intermediate chain gears 24 and 25 are fitted and fixed on the inner end of the drive chain, and a drive chain gear 27 is fitted and fixed on the drive shaft 26 of the drive motor M fixed on the top surface of the headstock l. A chain 28 is hung between the gear 27 and the intermediate chain gears 22 and 23.

Further, a cylindrical body 32 is provided at the base end of each arm 31 that supports the cross beam 30 of the mouth-shaped rotating frame 29, and a cylindrical body 32 is provided at the base end of each arm 31 that supports the cross beam 30 of the mouth-shaped rotating frame 29.
Each cylindrical body 32 is fitted onto the inner end of each rotating shaft 3 and fixed via a key 33. As shown in FIGS. 1 and 2, this rotating frame 29 is disposed above the raw wood W held by the chuck C at both end surfaces. Several bearing brackets 34 are fixed to the horizontal beam 30 of the rotating frame 29 at regular intervals in the length direction, and the rotating shaft 35 is formed by these several bearing brackets 34 and the tips of both arms 31.
Several drive rollers 36, which also serve as centering, are fitted and fixed to this rotating shaft 35, and driven chain gears 37 are fitted and fixed to both ends of the rotating shaft 35, respectively. , this driven chain gear 37 and the intermediate chain gear 2
4 and the chain 38.

Similarly, a cylindrical body 42 is provided at the base end of each arm 41 that supports the horizontal beam 40 of the mouth-shaped rotating frame 39, parallel to the horizontal beam 40 and facing outward of the rotating frame 39. is fitted onto the inner end of each rotating shaft 4 and fixed via a key 43. As shown in FIGS. 1 and 2, the rotating frame 39 is disposed on the sides of the raw wood W which is held by chucks C at both end surfaces. In addition, several (11) bearing brackets 44 are fixed to the horizontal beam 40 of the swing frame 39 at regular intervals in the length direction, and these several bearing brackets 44 and the tips of both arms 41 are connected to each other. A rotary shaft 45 is rotatably supported by the rotary shaft 45, and several driving rollers 46 which also serve as centering are fitted and fixed to the rotary shaft 45, and driven chain gears 47 are respectively attached to both ends of the rotary shaft 45. They are fitted and fixed, and a chain 48 is hung between the driven chain gear 47 and the intermediate chain gear 25. The outer circumferential surfaces of the pulsating rollers 36 and 46 that also serve as centering need to be configured so that driving force can be transmitted by pressing the outer circumferential surface of the raw wood W whose both end surfaces are held by the chucks C. For example, a large number of grooves may be provided in the 4 directions of the axis.

Further, a cylindrical body 52 is provided at the base end of the arm 50 of the mouth-shaped rotating frame 49 in parallel with the cross beam 51, and this cylindrical body 52 is fitted onto the inner end of the rotating shaft 5 and is inserted through the key 53. and fix it.
A shaft 55 is fixed non-rotatably by a bearing bracket 54 fixed to the free end of the cantilevered cross beam 51 and the tip of the arm 50, and a centering port (13) (12) is attached to this shaft 55. 56 is rotatably fitted. The outer peripheral surface of this centering roller 56 is smooth. Further, the mouth-shaped rotating frame 49 equipped with the centering roller 56 is disposed substantially below the raw wood W whose both end surfaces are clamped by the chuck C, and each centering roller 56 attached to each rotating frame 49
The axes of each are aligned with each other. In addition, the reason why each centering roller 56 is divided into left and right parts and pressed only on both ends of the raw wood W is to avoid interference with the tool rest 73, which will be described later. By determining the positional relationship with the roller 56 so that they do not interfere with each other, it is possible to have the same configuration as the centering driving roller 4G without dividing the centering roller 56 into left and right parts. , it is possible to use a driving roller that also serves as centering, thereby making it possible to supply driving force.

Note that the centering roller 56 is located on the side of the tool rest 73 with respect to the axis of the raw wood W, so that (14) the centering roller 46 and the centering roller 56 are They are located on opposite sides with respect to the axis b of the log W.

Also, the length between the axial center of the rotating shaft 3 and the axial center of the driving roller 36 that also serves as centering, and the length between the axial center of the rotating shaft 4 and the center of the driving roller 46 that also serves as centering. , and the lengths between the axis of the rotating shaft 5 and the axis of the centering roller 56 are determined to be equal to each other.

In addition, as shown in FIG. 4, a pin 59 is attached to the tip of the rod 58 of the hydraulic cylinder 57 for rotation at an appropriate position on the rotation gear 11.
When the rod 58 of the hydraulic cylinder 57 for rotation is gradually moved in and out to rotate the rotation gear 11, each sector gear 12, 13, 14 is rotated in a predetermined direction. 3, 4.5 and each rotating frame 29
, 39.49, the drive roller 36. The centering roller 46 and the centering roller 56 are configured to be maintained at equal distances from the axis of the main shaft 2 and gradually move toward or away from the axis of the main shaft 2 in synchronization with each other. It is.

When the drive motor M is started, the rotation of the drive shaft 26 is transmitted to the transmission shafts 1B and 19 through the chain 28, and the rotation of each transmission shaft 18, 19 is transmitted to the transmission shaft 1B, 19 through the chain 38. The rotating shaft 35. The driving force is transmitted from the outer periphery to the log W whose both end surfaces are clamped by the chuck C. is supplied. Incidentally, the circumferential speeds of the driving rollers 36 and 46 are set to be equal to each other.

In addition, a rotating shaft 62 is rotatably supported by a pair of brackets 61 fixed on the bed 60 diagonally below the line connecting both chucks C of the veneer race L, and corresponds approximately to the diameter of the raw wood W to be cut. A pair of raw wood supply members 63 with circular arc surfaces 63a
One end is fixed to both ends of the rotation shaft 62, and the tip of the rod 65 of the rotation hydraulic cylinder 64 and the rear end of one of the raw wood supply members 63 are pivotally attached (15). The pair of raw wood supply members 63 are rotated around the rotation shaft 62 by the movement of the rod 65 of the hydraulic cylinder 64 in and out, and thereby the raw wood W supported by each arcuate surface 63a of the pair of raw wood supply members 63 is transferred to the veneer lace. Supplied between both chucks C of L.

In addition, a rotating shaft 67 is rotatably supported by a pair of brackets 66 fixed on the bed 60 substantially below the line connecting both chucks C, and a circular arc surface 68 m approximately corresponding to the diameter of the raw wood W to be cut is formed. The proximal ends of a pair of raw wood holding members 68 equipped with
The tip of the rod 70 of No. 9 is pivotally connected to the center of one log holding member 68, and the rod 7 of the rotation hydraulic cylinder 69 is
The pair of raw wood holding members 68 are rotated within a predetermined angle by the movement in and out of zero.

In addition, a log supply conveyor 7 is provided diagonally above the log supply member 63.
1 is arranged almost horizontally, and this log supply conveyor 7
1 and a pair of raw wood supply members 63, several members 7
2. Lean forward and pass the kake.

(17) (16) Additionally, in order to avoid interference with the centering roller 56 disposed below, and to bring the cutting edge of the cutter 74 close to the drive roller 36 disposed above, In order to improve the transmission efficiency of driving force, it is designed to reciprocate in a direction inclined at a predetermined angle with respect to the horizontal.

In addition, a relatively small diameter chuck C is attached to the front end of the main shaft 2, and a coupling 76 is attached to the rear end via a bearing 75.
This coupling 76 is connected to the rod 78 of the hydraulic cylinder 77 for moving the chuck forward and backward. A sleeve 79 is rotatably supported on the headstock 1 by a bearing 80, and the main shaft 2 is slidably inserted into the sleeve 79, and the sleeve 79 and the main shaft 2 are connected non-rotatably to each other via a key 81. do. Now, when the rod 78 of the chuck advancing/retracting hydraulic cylinder 77 is moved in and out, the chuck C moves forward and backward.

The sleeve 79 also has a main shaft drive motor (not shown).
The main shaft 2 is rotated by the power transmitted from the key 8 (18).
Fixed via 3.

In the figure, 84 is a pressure roller for pressing the raw wood W immediately before cutting, 85 is a peeled core carrying conveyor for carrying out the stripped core W/ of the raw wood W, and 86 is a peeled core conveyor for carrying out the stripped core Wl of the raw wood W. An inclined surface provided on the bed 60 to guide the peeled core to the conveyor 85 is shown.

In addition, if the cutting force generated when cutting the log W is large, a force in the opposite direction to the cutting force is applied by hydraulic pressure or the like to the cross beam 30 of the rotating frame 29 disposed almost above the log W. It is necessary to prevent the log W from bending.

Next, regarding the cutting equipment for cutting raw wood with a non-perfect circular cross section, the same parts as the cutting equipment for cutting raw wood with an almost perfect circular cross section will be given the same reference numerals, and only the different parts will be explained. do.

When cutting raw wood with a non-perfect circular cross section, a large diameter chuck C1 and a small diameter chuck C2 that can advance and retreat independently of each other are used.
As shown in FIG. 8, a hollow first main shaft 87 with a large diameter chuck C1 attached to its tip is slidably inserted into the sleeve 79, and
and a first main shaft 87 are mutually non-rotatably connected via a key 88, a coupling 90 is attached to the rear end of the first main shaft 87 via a bearing 89, and this coupling 90 and It is connected to a rod 92 of a hydraulic cylinder 91 for advancing and retracting a large diameter chuck. Further, the second main shaft 93 with a small diameter chuck C2 attached to the tip thereof is slidably inserted into the hollow first main shaft 87, and the first main shaft 87 and the second main shaft 93 are connected. They are connected non-rotatably to each other via a key 94, and a coupling 96 is attached to the rear end of the second main shaft 93 via a bearing 95, and this coupling 96 and a rod of a hydraulic cylinder 97 for moving the small-diameter chuck forward and backward. 98. Now, the rod 9 of the large-diameter chuck advance/retreat hydraulic cylinder 91
When 2 is moved in and out, the large diameter chuck C1 moves forward and backward, and when the small diameter chuck advancement/retraction hydraulic cylinder 97 mouth (1) is moved in and out, the small diameter chuck C2 moves forward and back, and both chucks c1.c2 move in and out. move forward and backward independently of each other.

Further, in the above embodiment, two centering drive rollers and one centering roller that does not supply driving force are used as the rollers of the outer peripheral drive mechanism A that also serves as a centering mechanism. The number of rollers is not necessarily limited to three, and three or more rollers may be provided, and the number of driving rollers that also serve as centering may be appropriately determined in relation to the type or size of the raw wood W, and an appropriate size may be determined. The driving force for this can be supplied from the outer periphery of the log W.

(Action of the invention) Next, the action of the invention will be explained. First, to explain the operation when cutting a raw wood W having a nearly perfect circular cross section, first, in FIGS. 1 to 7, the rod 65 of the hydraulic cylinder 64 for rotation of the raw wood supply member 63 is pulled. In other words, if the log supplying member 63 is positioned as shown by the solid lines (21) and (20) in FIG. The first raw wood W1, which has a perfectly circular cross section, falls from the conveyor 71 and rolls on the member 72, and is transferred to a pair of raw wood supply members 63 as shown by solid lines in FIG.
It is held and stopped by each circular arc surface 63a.

Next, the rod 70 of the hydraulic cylinder 69 for rotation of the log holding member 68 is made to protrude so that the arcuate surface 68m of the log holding member 68 is directed upward as shown by the solid line in FIG. By retracting the rod 58 of the cylinder 57 and turning the turning gear 11, as shown in FIG. 46 and the centering roller 56 are separated from the axis of the main shaft 2, and the rod 78 of the chuck advance/retreat hydraulic cylinder 77 is retracted to move the chuck C backward. The rod (22) of the rotating hydraulic cylinder 64 of 63 is inserted between the hooks C, and is held by each arcuate surface 68a of the pair of raw wood holding members 68. When the first log W1 held by the pair of log supply members 63 is placed between the pair of chucks C, a phototube device (not shown) detects this, and the log supply conveyor 71 is activated. The second log W2 placed on the log supply conveyor 71 is
At the same time, the member 72 rolls and comes into contact with the log supply member 63, as shown by the solid line in FIG. 1, and stops.

Then, when the rod 65 of the rotating hydraulic cylinder 64 is retracted, the second log W2 is held by each arcuate surface 63a of the pair of log supply members 63 and is on standby.

Next, when each rod 58 of each turning hydraulic cylinder 57 of each turning gear 11 is gradually protruded and each turning gear 11 is turned in the direction of arrow P in FIG. 4, each sector gear meshed with the turning gear 11 12, 13, and 14 gradually rotate in the direction of arrow Q. When each sector gear 12, 13.14 rotates in the direction of arrow Q, each rotation axis 3, 4.5 rotates each sector gear +2.
13, 14, and thereby each rotating frame 29, 39, 49 gradually rotates in a direction approaching the axis of the main shaft 2. During this time, the log W1 held by the log holding member 68 is gradually lifted up by the drive roller 46 which also serves as centering and which is attached to the rotation frame 39, and the centering roller 56 which is attached to the rotation frame 49, and then the log W1 is rotated. Driving roller 3 that also serves as centering and is attached to the frame 29
6 comes into contact with the upper surface of the log W1.

Then, by continuing to apply hydraulic pressure to the diameter where the UWJ roller 36, which also serves as centering, is in contact with the upper surface of the log Wl, the three rollers 36, 46, and 56
Press the outer peripheral surface of 1.

Now, the W H1lt roller 36 which also serves as centering
The centering roller 46 and the centering roller 56 are configured to maintain equidistant distance from the axis of the main shaft 2, and move toward or away from the center of the main shaft 2 in synchronization with each other (23). Moreover, since the cross section of the log W1 is almost a perfect circle, the log W1 is rotated by each of the three rollers at 36°46°.
．． 56 and supported at three points, it is accurately centered.

Next, when the rod 78 of the chuck advancing/retracting hydraulic cylinder 77 is protruded and both chucks C are moved forward, both end surfaces of the raw wood W1 whose outer peripheral surface is suppressed by the three rollers 36, 46, 56 are moved to both chucks. It is held by C.

Next, when a main shaft drive motor (not shown) is started to rotate the main shaft 2 and each drive motor M is started, the power of the drive shaft 26 is transferred to the chain 28 . Transmitted to the rotating shafts 35 and 45 via the transmission shafts 18 and 19 and chains 38 and 48, the driving rollers 36 and I#I 46, which also serve as centering, begin to rotate once, and as a result, the log w1 is moved around the outer periphery and Desired force is supplied from both the main shafts and it begins to rotate.

Next, while applying hydraulic pressure in the direction in which each rod 58 of each turning hydraulic cylinder 57 protrudes, the blades (25) (24) When advanced to the thickness of the veneer veneer), each roller will be 36°46
．． 56 presses the outer circumferential surface of the log Wl with a predetermined force by the hydraulic pressure of the turning hydraulic cylinder 57, and gradually moves as the log W1 is cut, and the log W1 is continuously moved to the thin plate station by the cutter 74. It is being cut away.

Then, just before the diameter of the log W1 becomes smaller due to cutting and becomes uncuttable, the blade platform 73 is stopped, and the rod 58 of the swinging hydraulic cylinder 57 is stopped from protruding.
Next, the drive motor M is stopped.

Next, the rod 70 of the hydraulic cylinder 69 for rotating the log holding member 68 is retracted to rotate the log holding member 68 to the position shown by the two-dot chain line in FIG. 2, and then the tool rest 73 is retreated. At the same time, when both chucks C are retreated and the wood 58 of the swing hydraulic cylinder 57 is retracted to move each roller 36, 46. Peeled core W of raw wood W1
1 is the bellows (26) of the veneer lace L. It falls onto the inclined surface 86 provided on the drawer 0, and this inclined surface 86
The peeled core is placed on the core conveyor 85 and conveyed out.

Next, the second raw wood W2 held by the pair of raw wood supply members 63 and waiting is put between both chucks C, and the above operations are performed sequentially to cut the second raw wood W2. do.

Then, the above-mentioned operations are repeated to continuously cut the raw wood W having a perfectly circular cross section.

Next, regarding the operation when cutting a log Wa having a non-perfect circular cross section, only the portions that differ from the above-mentioned operation will be explained.

In FIGS. 1 to 9, after the outer periphery of the log Wa having a non-perfect circular cross section is pressed by three rollers 36, 46, and 56 and supported at three points, the log shown in FIGS. 8 and 9 (a) As shown,
A rod 92 of a hydraulic cylinder 91 for advancing and retracting a large diameter chuck,
When the rod 98 of the hydraulic cylinder 97 for advancing and retracting the small-diameter chuck is simultaneously projected, the large-diameter chuck C1 and the small-diameter chuck C2 simultaneously move forward and clamp both end surfaces of the log Wa. Then, chuck both end surfaces of the log Wa with chucks C1 and C2.
After clamping the log Wa
spaced apart from the outer circumferential surface of the In this state, when the spindle drive motor (not shown) is started and the log IVa is rotated and the tool rest 73 is advanced by a certain amount, the protrusion W4 on the outer periphery of the log Wa is cut by rough cutting. It is shaved off and the cross section becomes almost a perfect circle. After the cross section of the log Wa becomes almost a perfect circle, the spindle drive motor (not shown) is stopped to stop the rotation of the log Wa, and after the tool rest 73 is retreated, the turning hydraulic cylinder 57 is turned on again. By protruding the rod 58 and continuing to apply hydraulic pressure, the log Wa whose cross section becomes almost a perfect circle with the three rollers 36° 46.56
Press the outer periphery of the Next, as shown in FIGS. 8 and 9 (b) (27), the rod 9 of the large-diameter chuck advance/retreat hydraulic cylinder 91 is
2 to retract only the large diameter chuck C1.

In this state, the main shaft drive motor (not shown) and the driving motor! When the cliff is started, the second main shaft 93 rotates, and driving force is supplied from the small diameter chuck C2, and driving force is supplied from the outer periphery by the driving rollers 36 and 46, which also serve as centering, so that the cross section becomes almost true. When the circular log Wa begins to rotate and then the tool rest 73 is advanced by a certain distance W, the log Wa is continuously cut into a thin plate shape by the blade #74. Then, the chuck C2 has a small diameter of the log Wa.
When approaching the diameter of , the tool rest 73 is stopped. The subsequent operations are the same as those described above, so the explanation will be omitted.

In any of the above embodiments, if the weight of the log W is relatively small, the log W is temporarily held in the log holding member 6.
It is also possible to directly hold the main shaft 2 by two rollers 46 and 56 disposed below the axis of the main shaft 2, without holding it by the main shaft 8.

(29) (28) (Effects of the Invention) Since the present invention has the above-described configuration and operation, it has the following effects.

(1) The FF1G1 row arms of the 91G1 drive mechanism with a centering function, which also serves as centering for at least three trees, press the outer periphery of the log from at least three directions while supplying driving force from the outer periphery. Because the driving force is supplied from the main shaft to cut the log, the ratio of the driving force from the main shaft to the total driving force can be reduced, and the diameter of the chuck can be made small, allowing the cutting of the middle four parts of the log. Excessive torque is not applied and core cracking,
It is possible to smoothly cut logs to a small diameter without causing idle rotation of the chuck, and as a result, the yield of logs can be improved.

(2) Put the g wood between both chucks and hold it with the log holding member, then press the outer periphery of the log with at least three centering rollers for TW and Ib1J to support it (
30) If you hold the log, the log will be centered, and if you drive the drive roller that also serves as centering in this state, the driving force will be supplied from the outer circumference of the log and you can start cutting, so the cross section will be Not only can you quickly center logs with a perfectly round cross section, but you can also quickly center logs with a non-round cross section. This can be done continuously, making it possible to continuously cut raw wood, which in turn can improve the operation method of veneer lace.

(3) In particular, if the raw wood to be cut is a re-peeled log with a roughly circular cross section, each of the above effects will be extremely noticeable, and even if the cross section of the raw wood to be cut is not a perfect circle, the diameter will be reduced after rough cutting. By re-chucking with only the chuck,
It becomes possible to cut raw wood to a small diameter, and the yield of raw wood can be improved.

(4) Cut the log while firmly pressing the outer circumferential surface of the log from different directions using at least three centering drive rollers installed parallel to the axis of the log,
Since the forces that press the outer circumferential surface of the log from different directions are balanced with each other, even if a sudden force is applied to the log during cutting, the axial center position of the log will not move slightly. For this reason, the axis of the log,
The positional relationship with the tip of the knife does not change, making smooth cutting possible, making it possible to obtain high-quality veneer veneer, and preventing core cracks in the raw wood.

(5) The circumferential speed of the drive roller that also serves as centering can always be constant regardless of changes in the diameter of the log due to cutting.
There is no need for a rotational speed conversion mechanism for the drive roller that also serves as centering, and the structure of the mechanism including the drive motor for driving the drive roller becomes simple.

(6) Since the centering mechanism for centering the raw wood and the outer periphery drive mechanism (31) for supplying driving force from the outer circumference of the raw wood are used together, the configuration of the device is relatively simple, and In order to center the raw wood and feed it to the veneer race, the material feeding device provided in the conventional veneer race becomes unnecessary.

[Brief explanation of drawings]

FIG. 1 is a side view of an embodiment of a cutting device for cutting logs with a perfectly circular cross section, FIG. 2 is a side view of the same in a different operating state, and FIG. Figure 4 shows
A front view showing the positional relationship between the turning gear 11 and each sector gear 12, 13, and 14, FIG. 6th U-U line arrow view of
Figure (a) is a sectional view taken along the Y-Y line in Figure 2, Figure 7 (b) is a sectional view taken along the v-v line in Figure 2, and Figure 7 (a) is a sectional view taken along the line v-v in Figure 2.
- 7 line sectional view, the same (b) is a T-T line arrow view of the same (a), FIG. 8 is a sectional view of the main part of the cutting device for cutting logs with a non-perfect circular cross section FIGS. 9(a) and 9(b) are (33) (32) explanatory diagrams for explaining the effect. (Explanation of symbols of main parts) 117 *Turning gear +2.13, 14: Sector gear 29.39, 49: Swivel frame 36.46: Drive roller 56 that also serves as centering:
Centering roller 63: Log supply member 68: Log holding member A: Peripheral drive mechanism that also serves as centering mechanism C: Chuck
C1: Large diameter chuck C2: Small diameter chuck
L: Venya lace W: Log (34) Special I Kawaguchi: i 58-909'04 (13) Japanese Patent Application Publication No. 1975
8-90904 (14) Special aperture r; 58-90904 (15) q-z=->
, Note `` (Ba) ``-7τMo 1 Written Amendment of Procedures June 24, 1980 (To the Chief Examiner of the Japan Patent Office) (To the Examiner of the Patent Office) 1. Indication of the case 1975 Special Patent No. 11゛ Application No. 189.124 Yumi 3, Relationship with the amended person case Patent applicant address (residence) 2-I Tamafune-cho, Nakayo-ku, Nagoya] 1-11
i+4, Agent 500 TilTIUrj 58-90904 (17) The specification of this application is amended as follows. 1. Name of the invention S (method and equipment for cutting logs in veneer lace and device N) in lines 3 and 4 of page 1 is ``method and device for cutting logs with centering function in veneer lace.'' I will correct it. 2. The scope of claims from page 1, line 6 to page 4, line 15 will be amended as follows. F (1) A log with a nearly perfect cross section is placed between both chucks of the veneer race, and is temporarily held by a log holding member placed approximately below the line connecting both chucks. At least three centering drive rollers that are configured to maintain equal distances from the shaft center and move toward and away from the shaft center in synchronization with each other are brought close to the shaft center of the main shaft. The log is centered by pressing the outer circumferential surface of the log held by the log holding member, and then holding both end surfaces of the log with chucks, and in this state, centering the log 2- A driving force is supplied from the outer periphery of the log, and if necessary, a driving force is supplied from the chuck to rotate the log, and the driving roller that also serves as the center link is pressed against the outer circumferential surface of the log and approaches the main shaft finely. A method for cutting raw wood that also has a centering function in veneer lace, which is characterized by cutting the raw wood by gradually moving it in a manner similar to that shown in FIG. (2) A log with a non-perfect circular cross section is placed between both chucks of the veneer race, and is temporarily held by a log holding member placed approximately below the line segment connecting the image chucks, and then the axis of the main shaft is At least three driving rollers that also serve as centering are configured to maintain equal distances from each other and move toward and away from the axis of the spindle in synchronization with each other. After centering the log by moving it and pressing the outer circumferential surface of the log, clamp both end faces of the log with large diameter chucks, then separate it from the 3rd surface, and leave it as it is. A driving force is supplied from the large-diameter chuck to perform rough OJ thresholding until the log whose cross section is not a perfect circle becomes almost a perfect circle, and then the driving roller that also serves as centering is brought close to the axis of the main shaft again. The outer circumferential surface of the raw wood, which has been roughly cut to a nearly perfect circle in cross section, is pressed by moving the raw material in such a manner as to press the outer circumferential surface of the raw wood, which has been roughly cut to have a nearly perfect circular cross section.Then, the large diameter chuck is retracted, and both end faces of the raw wood are held between only the small diameter chucks. Iα and
In this state, the IuII low roller book that also serves as centering is driven to supply driving force from the outer circumference of the log, and if necessary, driving force is supplied from the small diameter chuck to rotate the log, and the centering A vegnare characterized in that the log is cut by pressing a dual-purpose driving roller against the outer peripheral surface of the log and gradually floating it so as to approach the axial center of the main spindle.4- (3) With respect to the axial center of the main spindle An outer periphery drive mechanism that also serves as centering dark blue, consisting of at least three drive rollers that also serve as centering and are configured to maintain equal distances and move toward and away from the axis of the main shaft in the same manner as each other. , a log supplying member rotatably supported substantially in front of a line connecting both chucks in order to supply logs between both chucks of the veneer race, and a log supplied from the log supplying member being temporarily held. For this purpose, a log holding member is rotatably supported almost below the line connecting both chucks, and a pair of chucks are supported on the headstock so as to be movable horizontally in order to clamp both end faces of the log. Centari in veneer lace characterized by containing
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Ka-ju” Trouble! ”3, W, page 4, lines 18 to 5, 1
Delete the entire text up to the third line and correct it as follows. ``The present invention relates to a method and device for cutting raw wood that also has a centering function in veneer lace.The first object of the present invention is to provide a centering mechanism for centering raw wood, and a centering mechanism for centering raw wood, The purpose is to make the outer periphery drive mechanism and the outer periphery drive mechanism for supplying driving force from the outer periphery work together, thereby eliminating the need for a dedicated centering device and quickly centering the raw wood. The objective is to improve the yield of logs by making it possible to efficiently cut not only logs with a perfect circle, but also logs with a non-circular cross section to a small diameter.
The purpose of this is to improve the operating efficiency of veneer lace by automating the cutting preparation and cutting processes of raw wood. 5-4.The entire text of ``On the other hand, it required...'' from line 11 to line 16 of the 7th Tei has been deleted and amended as follows. "On the other hand, in conventional veneer lace, the centering of the raw wood is performed by a dedicated centering device installed separately from the veneer lace, and the raw wood is supplied to the veneer lace, centering, ticking, cutting, !Each process, such as carrying out the MJ core, was not carried out continuously and quickly, and as a result, the operating efficiency of the veneer lace was poor.'' 5, page 7, line 18 to page 8, line 4 ``The present invention has been made...'' has been deleted, and ``The present invention has been made by deleting the phrase ``The present invention has been made. , which improves the yield of logs by making it possible to cut not only logs with an almost perfect circle cross section, but also logs with a non-perfect circle cross section to a small diameter with high efficiency. I will. 7-6 -6 In Figure 2, use the two-dot chain line.'' 7, No. 3 In the 4th line of page 1, "...The cross section is uneven..." is changed to "...The cross section is uneven, so there is no need for a dedicated centering device to center the log." Therefore, the cross section is blurred...'' and we will correct it. Above 8-

Claims (4)

[Claims] (1) A log with a nearly perfect cross section is placed between the veneer lace picture chucks, and is held by a log holding member placed approximately below the line connecting both chucks, and then the main shaft is At least three driving rollers, which also serve as centering, are configured to maintain equal distances from the center and move toward and away from the center of the main shaft in synchronization with each other. By moving and pressing the outer peripheral surface of the log held by the log holding member, the log is centered, and then both end surfaces of the log are clamped with chucks, and in this state, the centering wA is
An appropriate number of rffl rollers are driven to supply driving force from the outer periphery of the log, and the chuck is used to drive the rffl as needed. A veneer characterized in that the raw wood is cut by supplying II force to rotate the raw wood, and gradually moving the driving roller that also serves as centering to the outer circumferential surface of the raw wood while approaching the axis of the main shaft. How to cut logs for lace. (2) A log with a non-round cross section is placed between both chucks of the veneer race, and is held by a log holding member placed approximately below the line connecting both chucks, and then the main shaft J
At least three driving rollers, which also serve as centering, are configured to maintain an equal distance from each other and move toward and away from the axis of the spindle in synchronization with each other. By pressing the outer circumferential surface of the log, both end surfaces of the log are clamped with large-diameter chucks on the centering diameter of the log, and then the driving roller that also serves as centering is moved around the outer circumference of the log. Separated from the surface and in this state, the large-diameter chuck supplies driving force to perform rough cutting until the cross-section of the raw wood, which is not a perfect circle, becomes almost a perfect circle, and then the centering and driving The roller is again moved close to the axis of the main shaft to press the outer circumferential surface of the raw wood, which has been roughly cut to a nearly perfect circle in cross section, and then the large-diameter chuck is moved back to cut both end faces of the raw wood. The material is re-clipped with only the small diameter chuck, and in this state, an appropriate number of the drive rollers that also serve as centering are operated overtime to supply driving force from the outer circumference of the log, and if necessary, the drive rollers are driven from the small diameter chuck. The method is characterized in that the log is cut by supplying force to rotate the log, and gradually moving the driving roller that also serves as centering against the outer circumferential surface of the log in a 1:1 folding motion around the axis of the main shaft. How to cut raw wood for veneer lace. (3) Centering consisting of at least three driving rollers that also serve as centering, which are configured to maintain an equal distance from the axis of the main spindle and move toward and away from the axis of the main spindle in synchronization with each other. An outer circumferential drive mechanism that also serves as a mechanism, a log supplying member that is supported at a rotational angle 11111 approximately in front of a line connecting both chucks in order to supply logs between both chucks of the veneer race, and a log supplying member that is supported from the log supply member. A log holding member is rotatably supported almost below the line connecting both chucks to temporarily hold the supplied log, and a log holding member is moved horizontally to and from the headstock in order to clamp both end faces of the log. A device for cutting logs in veneer lace, comprising a pair of freely supported chucks. (4) A patent characterized in that the chuck consists of a large-diameter chuck and a small-diameter chuck, which are supported on a headstock so that their axes coincide with each other and move horizontally forward and backward independently of each other. The cutting front of raw wood in the veneer lace according to claim 3.