JPS6273904A - Two-roller type outer-circumference driving method and device 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 (Field of Industrial Application) The present invention provides a method and device for driving the outer periphery of a two-hole type veneer lace in which part or all of the driving force is supplied from the outer periphery of the raw wood. belongs to the field of

(Prior Art) The present applicant has filed Japanese Patent Application Nos. 56-189424 and 58-2.
No. 5353 and No. 58-79802, at least three drive ports are configured to maintain an equal distance from the axis of the spindle and move toward and away from the axis of the spindle in synchronization with each other. Centering of the log is performed by pressing the rod against the outer circumferential surface of the log and moving it synchronously so as to approach the axis of the main shaft, and at the same time, a part or all of the driving force is supplied from the outer circumference of the log to move the log. An application was filed for the purpose of cutting.

According to the inventions related to each of the above-mentioned applications, since at least three drive rollers are moved synchronously, there is an advantage that centering of logs can be performed.
If the drive rollers of the book are not placed along the spiral curve that is the cross-sectional shape of the raw wood during cutting, it will not be possible to cut smoothly, so at least three drive rollers will be placed on the veneer veneer board. As a result of repeated various experiments and research, it was discovered that there was a problem in that a means for making fine adjustments depending on the thickness was essential.

In addition, since the number of drive rollers is three or more, when the diameter of the log becomes small, the drive rollers interfere with each other. Therefore, in order to smoothly cut the log to a small diameter, it is necessary to reduce the diameter of the drive roller. The problem is that it has no choice but to do so.

If the diameter of the drive roller is made smaller, there is a problem that the rigidity of the drive roller itself becomes lower and the driving force that can be transmitted becomes smaller.

(Problems to be Solved by the Invention) The present invention has been made for the purpose of solving the above-mentioned problems and smoothly cutting raw wood to a small diameter while increasing the driving force from the outer periphery. be.

(Means for Solving the Problems) The present invention provides two shafts that 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. It is characterized by cutting the log by pressing the driving roller against the outer circumferential surface of the log and moving it synchronously so as to approach the axis of the main shaft, supplying part or all of the driving force from the outer circumference of the log. A two-roller outer circumferential drive method in a veneer race, and two pairs of synchronous rotations that rotate synchronously in the same direction via a synchronization means at positions equidistant from the main shaft on both headstocks of the veneer race. The driving shafts are supported facing each other, both ends of the rotating frame are fixed to the opposing synchronous rotating shafts, and each driving roller is attached to each rotating frame.The distance from the axis of the main shaft to the outer peripheral surface of each driving roller This is a two-roller type outer periphery drive device for a veneer lace, characterized in that the drive motor is mounted so that the drive motors are equalized, and the drive force of the drive motor is transmitted to the drive row via a drive force transmission means.

(Embodiment) FIGS. 1 to 5 show a two-roller type outer peripheral drive device according to the present invention.

Two synchronous rotation shafts 3 are supported facing each other at positions equidistant from the ambidextrous shafts 2 supported by both headstocks 1 of the veneer race L, respectively, and the rotating frames are mounted on the opposite synchronous rotation shafts 3. Both ends of the rotating frame 4 are fixed, and drive rollers R+ and Rz are supported at the tip of each rotating frame 4, respectively.

The drive rollers R1 and R2 are arranged to face each other along the vertical direction.

On the other hand, a main shaft 2 and a rotary gear 5 are rotatably supported, and two synchronous gears 6 are meshed with the rotary gear 5. Each synchronous gear 6 is fixed to the synchronous rotation shaft 3, respectively.

A rack 7 is engaged with the lower part of the turning gear 5, and
A synchronizing binion 8 is engaged with the rack 7, and the binions 8 provided on the left and right headstocks 1 are connected to each other by a connecting shaft 9. Each rack 7 provided on each headstock 1
The rods 21 of the cylinders 10 are respectively connected to the rods 21 of the cylinders 10, and the two synchronous gears 6 rotate in synchronization with each other by turning the turning gear 5 as the cylinders 10 move in and out.As a result, the two drive rollers R1, R2 move toward and away from the main shaft 2 in synchronization with each other. Furthermore, since the synchronizing pinions 8 are connected via the connecting shaft 9, the turning gears 5 are also rotated in synchronization with each other, so that the driving rollers R1 and R2 are not twisted when approaching or separating from the main shaft 2. There is no such thing.

In addition, as shown in FIGS. 2 and 4, the synchronous rotation shaft 3
The driving force transmission shafts 11 of the driving ports R1 and R2 are rotatably supported, and each chain gear 12 attached to the end of each driving force transmitting shaft 11 and the driving force transmitting shafts 11 of the driving ports R1 and R2 are rotatably supported. A chain 15 is hung between the chain gear 14 attached to the drive shaft 13, and the driving force of the drive motor M is transmitted to the drive roller RLR2 via the drive force transmission means A composed of the chain gear and the chain. configured to be transmitted.

Further, in this embodiment, the driving rollers R1 and R2 have a structure in which a plurality of rubber rollers 17 are intermittently fitted into a metal shaft 16, and the rubber rollers 17 press the surface of the log W to cause elastic deformation. Thus, the contact area between the rubber roller 17 and the log W increases, and the driving force is transmitted from the drive roller RLR2 to the log W by the frictional force between the rubber roller 17, which has a large contact area, and the log W.

In addition, in the figure, B is a tool post, C is a chuck, 18 is a cutter, and 19
20 indicates a roller bar, and 20 indicates a veneer veneer.

In order to supply driving force from the outer periphery of the raw wood W to cut it, as shown in FIG. 6(a), the rod 21 of the cylinder 10 is retracted and the turning gear 5 is turned in the direction of arrow P° in the force direction. The drive rollers R1 and R2 are kept far away from the main shaft 2, and the turret B is moved back a lot, and in this state, the raw wood W to be cut is put between the chucks C, and both end faces are chucked. Clamp with C.

Next, by starting the drive motor M and transmitting the driving force to the drive rollers R1 and R2 via the drive force transmission means A, the drive ports R1 and R2 are rotated. When the turning gear 5 is gradually turned in the direction of the arrow P by projecting the ten rods 21, the rubber rollers 17 constituting the rotating drive ports R1 and R2 press against the surface of the log W. As described above, when the rubber roller 17 presses the surface of the log W, the driving force of the drive rollers R1 and R2 is transmitted to the log W, causing the log W to rotate. Then, as shown in FIG. 6(b), when the tool rest B is advanced at a predetermined speed, the raw wood W is continuously cut by the cutter 18, and the veneer veneer 20 is obtained.

Here, as the drive roller RLR2 approaches the main shaft 2 in synchronization with each other as the log W is cut, the axis of the log W does not shift during cutting, and the log W is cut smoothly from beginning to end.

If you continue cutting in this state, the drive rollers R1, R
Because 2 is two, they do not interfere with each other,
Therefore, as shown in FIG. 6(c), it becomes possible to cut the log W until it has an extremely small diameter.

Incidentally, in the explanation of the above embodiment, the case where all of the driving force to be supplied to the raw wood W is supplied from the drive rollers R1 and R2 has been explained, but it is also possible to supply it from both the drive rollers R1 and R2 and the chuck C. Of course there is, and
The structure of the drive roller is not limited to the above-mentioned one, for example, it may be a metal roller with a large number of grooves provided on its outer periphery.

(Effects) (1) Two drive rollers that 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 are placed on the outer circumferential surface of the log. Since the log is cut by moving the main shaft synchronously to approach the axis of the main spindle and supplying part or all of the driving force from the outer circumference of the log, the axis of the log may shift during cutting. Cutting is smooth from start to finish without any problems, and even when the diameter of the log becomes small,
Since the book drive rollers do not interfere with each other, it is possible to cut logs down to small diameters. As a result, the yield of logs is improved.

(2) Even if the diameter of the log becomes small, the drive rollers do not interfere with each other, so it is possible to increase the diameter of the drive roller, which increases the rigidity of the drive roller and allows a large driving force to be applied to the outer circumference of the log. It becomes possible to supply from

(3) Suitable for cutting re-peeled raw wood where a large-diameter peeled core cut with other veneer lace is cut again.

[Brief explanation of drawings]

FIG. 1 is a side view of a veneer race equipped with a two-roller peripheral drive device according to the present invention, FIG. 2 is a side view of synchronizing means for drive roller RLR2, and FIG. 4 is a front view of the driving force transmission means A that transmits the driving force to the driving rollers R1 and R2, and FIG. 5 is a front view of the driving force transmission means A that transmits the driving force to the driving rollers R1 and R2. 6(a) to 6(c), which are plan views showing the positional relationship, are diagrams showing the progress of cutting the log W. (Explanation of symbols of main parts) A: Driving force transmission means L: Plywood race M: Drive motors R1, R2: Drive roller W: Log 1: Headstock 2: Spindle 3: Synchronous rotation axis 4: Swivel frame 5: Swivel gear 6: Synchronous gearwork 6: Metal shaft work 8: Rubber roller Fig. 1 Fig. 2

Claims (4)

[Claims] (1) Two drive rollers that 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 are pressed against the outer peripheral surface of the log. A two-roller type outer periphery of a veneer race characterized by cutting the raw wood by moving synchronously so as to approach the axis of the main shaft and supplying part or all of the driving force from the outer periphery of the raw wood. Driving method. (2) Two pairs of synchronized rotation shafts that rotate synchronously in the same direction are supported opposite each other through synchronization means at positions equidistant from the main shaft on both headstocks of the veneer race, and Both ends of the rotating frames are fixed to the synchronous rotating shafts, and drive rollers are attached to each rotating frame so that the distances from the axis of the main shaft to the outer peripheral surface of each drive roller are equal, and the drive motor is driven. A two-roller type outer peripheral drive device for veneer lace, characterized in that it is configured to transmit force to a drive roller via a drive force transmission means. (3) A two-roller type veneer race according to claim 2, wherein the synchronizing means is composed of a turning gear and two synchronizing gears meshing with the turning gear. Peripheral drive device. (4) In the veneer lace according to claim 2, wherein the drive roller has a structure in which a plurality of rubber rollers are intermittently fitted to a metal shaft at predetermined intervals. A two-roller type outer peripheral drive device.