JPS6111766B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention utilizes at least three drive rollers that press against the outer circumferential surface of the log and move synchronously toward the axis of the main shaft, thereby transferring part or all of the driving force from the outer circumference of the log. The present invention relates to an outer circumferential drive method and device that provides a function to keep the axis of the raw wood fixed in a veneer race that keeps the axial center position of the raw wood immobile during cutting.

When cutting the log by supplying part or all of the driving force from the outer circumference of the log using the above method, the 12th
As shown in the figure, if the shortest length r from the axis O of the main shaft to the outer peripheral surface of each drive roller R ₁ , R ₂ , R ₃ is set equal, the cross-sectional shape of the log W during cutting will be The length from the center O' to the outer circumferential surface starts from the part of the raw wood W immediately after cutting, gradually increases along the rotation direction, and becomes a spiral line that reaches its maximum just before cutting, so theoretically, , only the upper drive roller R ₁ closest to the cutter 110 supplies driving force while pressing the outer circumferential surface of the log W, and there is a small amount of space between the other drive rollers R ₂ , R ₃ and the outer circumferential surface of the log W. A gap is formed, resulting in a non-contact condition.
No driving force is supplied from the driving rollers R ₂ and R ₃ .

However, in reality, the upper drive roller _R1 pushes down the log W, and the axis O of the main shaft and the axis of the log W
The log W is cut in a state where O' is slightly biased.

As a result, the relative position between the axis O' of the raw wood W and the tip of the cutter 110 fluctuates, making the cutting condition unstable and making it impossible to obtain a veneer veneer with the set thickness. Due to variations in the thickness of the plate and due to the above reasons, the three drive rollers
The drive efficiency due to R ₁ , R ₂ , and R ₃ is poor, and there are problems such as the inability to cut logs into fine pieces.

The present invention has been made against the background of the above-mentioned circumstances, and its gist is to move at least three drive rollers synchronously toward the axis of the main shaft while pressing against the outer circumferential surface of the log. In the method of driving the outer circumference of raw wood in a veneer race that supplies part or all of the driving force from By gradually increasing the size slightly along the rotation direction starting from the part immediately after cutting the raw wood in accordance with the thickness of the veneer veneer, each drive roller follows a spiral curve that corresponds to the cross-sectional shape of the raw wood at the time of cutting. By arranging them together, the axial center of the log and the axis of the main shaft are made to coincide with each other during cutting, and the axial center of the log is kept stationary so that driving force is supplied from the outer periphery of the log.

Hereinafter, embodiments of the invention set forth in claim 2 will be specifically described with reference to the accompanying drawings.

In Figures 1 to 10, veneer lace L
Each headstock 1 provided on both sides of the headstock 1 is equipped with an outer peripheral drive device A for supplying driving force to the thick wood W from the outer periphery.
are installed respectively. The configurations of the peripheral drive devices A mounted on each headstock 1 are almost the same, so only one of the peripheral drive devices A will be described, and only the different parts of the other peripheral drive device A will be described.

The first and second spindles 2 in each headstock 1,
Three pairs of synchronous rotation shafts 4, 5, and 6 are rotatably supported by bearings 7, 8, and 9 with their axes horizontal on the same circumference with center point 3. Synchronous rotation axis 4,
6 is supported obliquely above the first and second main shafts 2 and 3, and the synchronous rotation shaft 5 is supported diagonally above the first and second main shafts 2 and 3, respectively.
It is supported diagonally below the main shafts 2 and 3 of.

The first and second spindles 2 are mounted on the outer periphery of the headstock 1.
A protrusion 10 having a circular cross section is provided so that the axis coincides with the axis of the rotation gear 12, and a turning gear 12 is fitted into the protrusion 10 via a bearing 11 so as to be able to freely rotate in a vertical plane. Sector gears 13, 1 with equal pitch diameters are provided at the outer ends of the shafts 4, 5, 6, respectively.
4, 15 are fixed via keys 16, 17, 18, and each sector gear 13, 14, 15 and the turning gear 12 are meshed with each other.

A synchronous rotation shaft 4 supported on one headstock 1,
5 and 6 are drive rollers 62 and 6, which will be described later, respectively.
a transmission shaft 19 for transmitting driving force to 3 and 64;
20, 21 are inserted, and the bearings 22,
It is rotatably supported via 23 and 24.
In this embodiment, the drive rollers 62, 63, 64 are
Since the driving force is transmitted only from one side, the synchronous rotation shaft 4 supported by the other headstock 1,
The transmission shafts 19, 20, 21 are not inserted through the transmission shafts 5, 6.

Intermediate chain gears 25, 26, 27 are fitted and fixed on the outer end of each transmission shaft 19, 20, 21, respectively, and another intermediate chain gear 25, 26, 27 is fitted and fixed on the inner end of each transmission shaft 19, 20, 21. Chain gears 28, 29, and 30 are fitted and fixed. Further, as shown in FIG. 7, a chain 35 is hung between a drive chain gear 32 fitted and fixed to the drive shaft 31 of the drive motor M and an intermediate chain gear 34 fitted and fixed to the intermediate shaft 33. and the intermediate shaft 33
A chain 37 is attached to another intermediate chain gear 36 fitted and fixed to the intermediate chain gear 36 and each of the intermediate chain gears 25, 26, 27, and a drive motor M drives each transmission shaft 19, 20, 2.
1 is configured to be rotated.

In FIG. 1, FIG. 4, and FIG. 8, the respective base ends of both arms 40 supporting the cross beam 39 of the rotating rotating frame 38 are connected to the respective synchronous rotating shafts facing each other via bearings 41. 4 is rotatably supported on the inner end of the synchronous rotary shaft 4, and thereby the rotary rotating frame 38 is rotatably supported on the synchronous rotary shaft 4. This rotating rotation frame 38 has both chucks.
It is arranged almost in front of the log W held between C ₁ and C ₂ . An operating arm 42 is disposed outside each arm 40 of the rotating rotation frame 38, and the base end of the operating arm 42 is fixed to the synchronous rotation shaft 4 via a key 43. An adjustment bolt 45, which is a fine adjustment means for finely adjusting the position of a drive roller 62 (described later) with respect to the operation arm 42, is screwed into a bracket 44 fixed to the tip of the operation arm 42 so as to be able to move forward and backward. The rotation of the moving shaft 4 causes the operating arm 42 to rotate in a direction approaching the first and second main shafts 2 and 3, and the tip of the adjustment bolt 45 moves toward the rotating pivot frame 38.
abuts against the arm 40 of
The actuating arm 42 and the rotating pivot frame 38 are configured to rotate together. A bracket 44 fixed to the tip of the operating arm 42 and a rotating rotating frame 3
It is connected to the arm 40 of No. 8 by a tension spring 46.

In FIG. 1, FIG. 4, and FIG. 9, with a similar configuration, the base ends of both arms 49 supporting the cross beam 48 of the rotating rotating frame 47 are arranged opposite to each other via a bearing 50. It is rotatably supported on the inner end of the synchronous rotation shaft 5, and thereby the rotation rotation frame 47 is rotatably supported on the synchronous rotation shaft 5. This rotating turning frame 47 is arranged substantially below the log W held between the chucks C ₁ and C ₂ . Rotating rotation frame 47
An actuating arm 51 is disposed on the outside of each arm 49, and the base end of the actuating arm 51 is connected to the key 5.
2 to the synchronous rotation shaft 5. A bracket 53 fixed to the tip of the operating arm 51,
An adjustment bolt 54, which is a fine adjustment means for finely adjusting the position of a drive roller 63 (to be described later) with respect to the operating arm 51, is screwed so that it can move forward and backward, and the rotation of the synchronous rotation shaft 5 causes the operating arm 51 to move between the first and second positions. second main shaft 2,
3, the tip of the adjustment bolt 54 comes into contact with the arm 49 of the rotation rotation frame 47 and pushes up the rotation rotation frame 47, so that the operating arm 51 and the rotation rotation frame 47 are integrated. It is configured to rotate as follows.

Also, in Figures 1, 4 and 10,
The base ends of both arms 57 that support the horizontal beam 56 of the fixed rotation frame 55 are fixed to the inner ends of the synchronous rotation shafts 6 facing each other via keys 58, so that the synchronous rotation shafts 6
The fixed rotation frame 55 is configured to rotate around the synchronous rotation shaft 6 due to the rotation. This fixed rotating frame 55 is arranged substantially above the log W held between the chucks C ₁ and C ₂ .

Cross beams 39, 4 of each of the rotating frames 38, 47, 55
Each bracket 5 fixed to both ends of 8, 56
Drive rollers 62, 63, 6 by 9, 60, 61
Both ends of 4 are rotatably supported. Rotating shafts 65, 66, 6 of each drive roller 62, 63, 64
Driven chain gears 68, 69, 7 are provided at one end of 7, respectively.
0 is fitted and fixed. Each rotating frame 38, 47,
Intermediate chain gears 71, 72, 73 for applying tensile force provided on one arm 40, 49, 57 of 55, the driven chain gears 68, 69, 70, and the intermediate chain gears 28, 29, 30. Chains 74, 75, and 76 are respectively attached to the drive rollers 62, 63, and 64 so that the rotation of the transmission shafts 19, 20, and 21 rotates the drive rollers 62, 63, and 64, respectively. Each of the drive rollers 6
The outer peripheries of 2, 63 and 64 are both chucks C ₁ and C ₂
It is necessary that the driving force is transmitted by pressing the outer circumferential surface of the raw wood W whose both end surfaces are held between the A configuration may be adopted in which a large number of grooves are provided in a direction with an angular inclination.

In addition, the length between the axial center of the synchronous rotation shaft 4 and the axial center of the drive roller 62, the length between the axial center of the synchronous rotation shaft 5 and the drive roller 63, and the length between the axial center of the synchronous rotation shaft 4 and the drive roller 63, The lengths between the axes and the driving rollers 64 are set to be equal, and the circumferential speeds of the driving rollers 62, 63, and 64 are set to be equal to each other.

As shown in FIGS. 4 and 11, by moving each adjustment bolt 45, which is a fine adjustment means, back and forth, the drive roller 62 is moved relative to the operating arm 42.
By finely adjusting the position of the drive roller 63 with respect to the operating arm 51 by moving the adjustment bolt 54 forward and backward, the drive roller 6 can be moved from the axis O of the first and second main shafts 2 and 3.
3. Shortest length to the outer peripheral surface of 62 and 64
r ₁ , r ₂ , r ₃ are set so that they gradually increase slightly along the rotation direction starting from the part immediately after cutting of the raw wood W, and the difference between the shortest lengths of the adjacent drive rollers 62 and 63 ( r ₂ − r ₁ ), and the difference in the shortest length of the adjacent drive rollers 64 and 62 (r ₃ −
r ₂ ) is determined in accordance with the thickness t of the veneer veneer V to be cut.

Further, as shown in FIG. 7, the turning gear 1
The tip of the rod 78 of the hydraulic cylinder 77 for rotation is pivotally connected to the appropriate position of 2 through a pin 79, and the rod 78 of the hydraulic cylinder 77 for rotation is protruded to rotate the rotation gear 12 in the direction of arrow P. By doing so, each rotating frame 38, 47, 55 is connected to the first and second main shaft 2,
3, each drive roller 62, 63, 64 is configured to gradually move toward the first and second main shafts 2, 3 in synchronization with each other.

Further, as shown in FIG. 6, a cylindrical sleeve 81 is rotatably supported on the headstock 1 via a bearing 80, and a driven chain gear 82 is fixed to the sleeve 81 via a key 83. . The cylindrical first main shaft 2 is inserted into the sleeve 81 so as to be slidable in the axial direction, and the sleeve 81 and the first main shaft 2 are non-rotatably connected via a key 84. A large-diameter chuck C ₁ is attached to the tip of the first main shaft 2, and a coupling 86 is rotatably attached to the rear end via a bearing 85. The rod 88 of the hydraulic cylinder 87 is connected. The second main shaft 3 is inserted into the first main shaft 2 so as to be slidable in the axial direction, and the first main shaft 2 and the second main shaft 3 are non-rotatably connected via a key 89. ing. A small-diameter chuck C ₂ is attached to the tip of the second main shaft 3, and a coupling 91 is rotatably attached to the rear end via a bearing 90. The rod 93 of the cylinder 92 is connected to the hydraulic cylinder 9 for advancing and retracting the small diameter chuck.
By moving the two rods 93 in and out, only the small diameter chuck _C2 is configured to move forward and backward independently with respect to the large diameter chuck _C1 .

Further, as shown in FIGS. 1 and 5, a pair of stoppers 94 are provided on the veneer race L to abut the cross beams 39 of the rotary pivot frame 38 to prevent the pivot pivot frame 38 from turning. It is located in the front,
A pair of stoppers 95 are provided on the bed 96 for abutting the cross beam 48 of the rotating rotating frame 47 to prevent the rotating rotating frame 47 from turning. A pair of raw wood supply members 97 are provided in front of the veneer race L to supply the once held raw wood W between the chucks C ₁ and C ₂ of the veneer race. A carry-in conveyor 98 is installed, and a pair of bridge members 99 having an inclined portion on the upper surface are spanned between the carry-in conveyor 98 and the log supply member 97. Also, cutlery 1
The tool rest 101 equipped with the tool 00 is configured to reciprocate in a direction inclined at a predetermined angle with respect to a horizontal plane, and moves forward in a forward-inclined state. In addition, 102 in the figure indicates a pressing roller for pressing the raw wood W immediately before cutting.

Furthermore, in the above embodiment, the driving force is supplied from the outer periphery of the log using three driving rollers, but
In cases such as increasing the proportion of the driving force supplied from the outer periphery, it is also possible to use three or more drive rollers, and it is also possible to use three or more synchronous rotation shafts 4, 5, and 6 to rotate synchronously. As a synchronizing means for moving, the turning gear 1
2 and each sector gear 13, 14, 15 is shown, but it goes without saying that the invention is not limited to this.

As is clear from the above description, the invention described on page 2 of the claims fixes a fixed rotation frame to a specific pair of synchronous rotation axes, and attaches a rotation frame to all other synchronous rotation axes. In addition to rotatably supporting the rotating frame,
The operating arms for rotating the rotating rotating frame together with the synchronous rotating shaft are each fixed.

In contrast, the invention recited in claim 3 rotatably supports a rotating rotating frame on each of the synchronous rotating shafts, and also allows the rotating rotating frame to rotate synchronously. Each of the actuating arms for rotating integrally with the shaft is fixed, and a drive roller is attached to each of the rotation frames. Corresponding to the thickness of the board, the position of the drive roller relative to the operating arm is set on each synchronous rotation axis by starting from the part immediately after cutting of the log W and gradually increasing the size slightly along the direction of rotation. A fine adjustment means is provided for fine adjustment, and the fine adjustment means arranges each drive roller along a spiral line corresponding to the cross-sectional shape of the raw wood during cutting, and a detailed explanation will be omitted.

Next, the operation of the invention described in claim 2 will be explained. First, a case will be described in which a log having a cross section of approximately perfect circle is cut, and then a case in which a log having a cross section which is not a perfect circle is cut will be explained.

First, by moving the adjustment bolts 45 and 54, which are fine adjustment means, back and forth, the axes of the first and second main shafts 2 and 3 are adjusted as shown in FIG.
The shortest lengths r ₁ , r ₂ , r ₃ from to the outer circumferential surfaces of the drive rollers 63, 62, and 64 are determined so that they gradually increase along the rotation direction starting from the portion immediately after cutting the log W, and , the difference in the shortest length between the adjacent drive rollers 62 and 63 (r ₂ −r ₁ ),
And _each drive _roller 6
2, 63, and 64 are arranged along a spiral curve corresponding to the cross-sectional shape of the raw wood W during cutting.

Then, by operating the carry-in conveyor 98, the raw wood W located at the front end of the carry-in conveyor 98 is
is temporarily held by the log supply member 97 as shown by the solid line in FIG. 1 by rolling the bridge material 99. In this state, as is clear from the figure, the fixed rotating frame 55 and the operating arm 4 rotate in synchronization with each other.
2 and 51 are the first and second main shafts 2 and 3.
The rotating rotating frame 38 is stopped far away from the axis of the rotating frame 38 and is rotatably supported on the synchronous rotating shaft 4.
is slightly pulled up by the tension spring 46 and comes into contact with the stopper 94, and the rotating rotating frame 47 is rotatably supported on the synchronous rotating shaft 5.
is in contact with the stopper 95 due to its own weight.
Further, the tool rest 101 is moved backward. When the log supplying member 97 is rotated in the direction of the arrow Q in this state, the log W held by the log supplying member 97 is transferred to both chucks C of the veneer race L, as shown by the two-dot chain line in FIG. ₁ and _C2 and held by the drive rollers 62 and 63.

Next, when the rod 78 of the hydraulic cylinder 77 for rotation is protruded and the rotation gear 12 is rotated in the direction of arrow P (see FIG. 7), the fixed rotation frame 55 and the operating arm 4 are rotated.
2 and 51 start turning synchronously in a direction approaching the axes of the first and second main shafts 2 and 3, and when they turn at a predetermined angle, the adjustment bolt 45 screwed onto the bracket 44 of the operating arm 42 rotates. Arm 4 of rotating frame 38
0 and the bracket 5 of the working arm 51
The adjustment bolt 54 screwed onto the rotating frame 47 contacts the arm 49 of the rotating rotating frame 47, and the rotating rotating frames 38, 47 are lifted by the respective operating arms 42, 51, and thereafter the rotating rotating frames 38, 47 and fixed rotating frame 5
5 rotate in synchronization with each other. Each rotating rotation frame 3
8 and 47 begin to rotate, each drive roller 62,
The log W held by 63 is gradually lifted up,
When the raw wood W is held by the three drive rollers 62, 63, 64 as shown in FIG.
5 is unable to rotate, but the hydraulic cylinder 77 for rotation
Continue to apply hydraulic pressure to. Each drive roller 62, 63,
Since the shortest lengths to the outer peripheral surface of 64 are almost equal,
Three driving rollers 62,
By holding the logs 63 and 64, the log W is centered.

Next, the large-diameter chuck advancing/retracting hydraulic cylinder 87 and the small-diameter chuck advancing/retracting hydraulic cylinder 92 are respectively protruded, and the three driving rollers 62, 63,
Both end faces of the raw wood W held by 64 are held between a large diameter chuck _C1 and a small diameter chuck _C2 .
After that, the drive motor M is started to rotate each drive roller 62, 63, 64, and the first and second main shafts 2, 3 are rotated to drive the large diameter chuck.
When C ₁ and the small diameter chuck C ₂ are rotated, driving force is supplied from both the outer circumferential surface and both end surfaces of the raw wood W, and the raw water W begins to rotate.
01 is advanced by a certain amount (thickness t of the veneer veneer V to be cut) per one rotation of the log W, each drive roller 62, 63, 6 moves forward as shown in FIG.
4 moves synchronously with the cutting of the log W while pressing the outer peripheral surface of the log W with a predetermined force by the hydraulic pressure of the turning hydraulic cylinder 77, and the log W is cut into the cutter 100.
The plate is cut into a thin plate with a predetermined thickness t.
A veneer veneer V is obtained. Here, as described above, each of the drive rollers 62, 63, 64 is arranged along a spiral curve corresponding to the cross-sectional shape of the raw wood W during cutting, so as is clear from FIG. The axis O of the second main shafts 2 and 3 and the axis O' of the log W coincide, and the three drive rollers 6
2, 63, and 64 move synchronously toward the axis O of the first and second main shafts 2 and 3 while pressing the outer circumferential surface of the log W from different directions to cut the veneer veneer V. , the axis O' of the log W does not move slightly. Therefore, the raw wood W is in an extremely stable state, and a high quality veneer veneer V having the set thickness is cut.

Immediately before the diameter of the log W becomes too small to be cut, the tool post 101 is stopped, and the rod 78 of the swinging hydraulic cylinder 77 is stopped from protruding, and then the drive roller M and both chucks C ₁ , Stop the rotation of C ₂ .

Next, when the tool post 101 is retreated and the rod 78 of the swing hydraulic cylinder 77 is retracted, the fixed swing frame 55 and each operating arm 42, 51 swing in the opposite direction, and each swing swing frame 3
8 and 47 rotate in the same direction due to their own weight, the rotating rotating frame 38 is slightly pulled up by the tension spring 46 and contacts the stopper 94, the rotating rotating frame 47 contacts the stopper 95, and the three The stripped core of the log W whose outer peripheral surface was pressed by the drive rollers 62, 63, and 64 falls onto the bed 96 and is discharged to the outside.

In addition, at the beginning of cutting, the large diameter chuck C ₁ and the small diameter chuck C ₂ clamp both end faces of the log W to supply driving force, and when the diameter of the log W becomes below a certain value,
Retract only large diameter chuck C ₁ to create small diameter chuck
By clamping both end surfaces of the raw wood W with only C ₂ , the diameter of the stripped core W' of the raw wood W can be reduced, and the yield can be improved.

In addition, when changing the thickness t of the veneer veneer V to be cut, each adjustment bolt 45, which is a fine adjustment means,
54 is moved back and forth, and the difference in the shortest length between the adjacent drive rollers 62 and 63 (r ₂ - r ₁ ) and the difference in the shortest length between the adjacent drive rollers 64 and 62 (r ₃ - r ₂ ) can be changed.

Next, to briefly explain the case of cutting raw wood with a non-perfect circular cross section, the raw wood with a non-perfect circular cross section is centered using a known material feeding device equipped with a function for centering the raw wood, and the raw wood with a non-perfect circular cross section is is supplied between both chucks, and rough cutting is performed by supplying driving force only from both chucks until the cross section becomes almost a perfect circle. From then on, the driving force is supplied from the outer periphery of the log using the method described above to cut the log. do it.

Further, the function of the invention described in claim 3 is that when finely adjusting the position of each drive roller with respect to each operating arm, each fine adjustment means provided on all the synchronous rotation shafts is operated. The operation is the same as that of the invention described in claim 2, except that it is necessary to do so.

According to the present invention, at least three drive rollers that move in synchronization with each other toward the axis of the main spindle are arranged along a spiral line corresponding to the cross-sectional shape of the raw wood during cutting. The log is cut by tightly tightening the outer periphery of the log by each drive roller while the core and the axis of the log are aligned, so that the axis of the log does not move at all during cutting. Therefore, the relative position between the axis of the raw wood and the tip of the cutter does not change at all, so it is possible to smoothly cut a high quality veneer veneer to the set thickness.

Further, changes in the thickness of the veneer veneer to be cut can be freely handled by operating the fine adjustment means to finely adjust the position of the drive roller relative to the operating arm.

In addition, since the log is cut with the outer circumference of the log tightly tightened by at least three drive rollers, swinging of the log is reliably prevented from the beginning of cutting to the end of cutting, resulting in high quality products with a constant thickness. It is possible to cut veneer veneers of
It is possible to prevent the chuck from running idle.
Also, since part or all of the driving force is supplied from the outer peripheral surface of the log by at least three drive rollers, it is possible to reduce the proportion of the driving force supplied from the chucks that clamp both end surfaces of the log. ,
Or it can be set to none at all. As a result, it becomes possible to reduce the chuck diameter and cut the raw wood to a small diameter, which in turn improves the yield of raw wood.

Furthermore, the shortest lengths from the axis of the main shaft to the outer peripheral surface of at least three drive rollers are set to be approximately equal, and each drive roller moves in synchronization with each other, so that the cross-section of the log to be cut is If the log is approximately a perfect circle, the log is centered by feeding the log between both chucks and holding the outer periphery with each drive roller. That is, when cutting logs with an almost perfect circular cross section, at least 3
The book drive roller performs the centering function, eliminating the need for special centering devices.

[Brief explanation of the drawing]

1 to 3 are schematic side views of a veneer lace L equipped with a log outer circumferential drive device A according to the invention set forth in claim 2, in different operating states, and FIG. FIG. 3 is a partial detailed view, FIG. 5 is a schematic plan view of the veneer lace L,
FIG. 6 is an enlarged sectional view of the main shaft portion of the veneer race L, and FIG. 7 is a diagram showing the turning gear 12 and each sector gear 1.
3, 14, and 15, and FIGS. 8 to 10 are lines X-X and Y-X in FIG.
11 is a diagram showing the positional relationship between the raw wood W and each driving roller 62, 63, 64, and FIG. 12 is a sectional view taken along the Y line and Z-Z line.
The log W and each drive roller R ₁ , R ₂ , when the shortest lengths reaching the outer peripheral surface of R ₁ , R ₂ , and R ₃ are made equal,
It is a figure showing the positional relationship with _R3 . (Explanation of symbols of main parts), 1... Headstock,
4, 5, 6... Synchronous rotation axis, 38, 47... Rotating rotation frame, 42, 51... Operating arm, 45, 54...
Adjustment bolt (fine adjustment means), 55... Fixed rotating frame, 62, 63, 64... Drive roller.

Claims (1)

[Claims] 1. A veneer that supplies part or all of the driving force from the outer periphery of the log by moving at least three driving rollers synchronously toward the axis of the main shaft while pressing against the outer periphery of the log. In the method of driving the outer circumference of raw wood in a race, the shortest length from the axis of the main shaft to the outer circumferential surface of at least three drive rollers is adjusted to correspond to the thickness of the veneer veneer to be cut. By gradually enlarging the drive roller slightly along the direction of rotation starting from the part immediately after cutting, each drive roller is arranged along a spiral curve corresponding to the cross-sectional shape of the log at the time of cutting, and the axis of the log at the time of cutting is adjusted. An outer periphery drive method having a function of keeping the axial center of a log in a veneer lace, characterized by aligning the axis of the main shaft with the axial center of the main shaft and supplying driving force from the outer periphery of the log while keeping the axial center of the log immobile. 2 At least three pairs of synchronized rotation shafts that synchronously rotate in the same direction in the circumferential direction around the main shaft in both headstocks of the veneer race are supported oppositely through synchronization means, and A fixed rotating frame is fixed to a pair of synchronous rotating shafts, a rotating rotating frame is rotatably supported on all other synchronous rotating shafts, and
A working arm for rotating the rotating rotating frame integrally with a synchronous rotating shaft is fixed, and a driving roller is attached to the fixed rotating frame and each rotating rotating frame, and each driving roller is connected from the axis of the main shaft. The shortest length to the outer circumferential surface of the veneer corresponds to the thickness of the veneer veneer to be cut, and the starting point is the part immediately after cutting of the raw wood, and gradually increases slightly along the direction of rotation. Each of the synchronous rotation shafts supporting the rotation frame,
A peripheral drive device having a function of keeping the axis of raw wood in veneer lace immobile, characterized in that a means for finely adjusting the position of the drive roller with respect to the operating arm is provided. 3 At least three pairs of synchronous rotation shafts that rotate synchronously in the same direction in the circumferential direction around the main shaft in both headstocks of the veneer race through synchronization means are supported so as to face each other, and A rotating rotating frame is rotatably supported on each synchronous rotating shaft, and an operating arm for rotating the rotating rotating frame integrally with the synchronous rotating shaft is respectively fixed, and each of the rotating frames is rotatably supported. Drive rollers are mounted on each rotating frame, and the shortest length from the axis of the main shaft to the outer peripheral surface of each drive roller corresponds to the thickness of the veneer veneer to be cut, and the direction of rotation is determined from the point immediately after cutting the raw wood. The veneer lace is mounted so that the roller gradually becomes larger along the veneer lace, and is provided with fine adjustment means on each synchronous rotation shaft for finely adjusting the position of the drive roller with respect to the operating arm. Peripheral drive device with a function to keep the axis of logs stationary.