JPS61228903A - 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 [Industrial Application Field] The present invention relates to a veneer lace for cutting a veneer veneer (hereinafter referred to as veneer) while rotationally driving a log by a log drive member.

[Prior Art] Conventionally, a rotating log driving member is applied to the outer circumferential surface of the jacked log, and a cutting knife moves toward the outer circumferential surface of the log as the log is rotated to cut the veneer. Peripherally driven type veneer laces are generally known.

The log drive member of the above type is made of an elastic roll made of hard urethane rubber or the like, and rotates the log by the frictional force generated when it is pressed against the log, or a metal member such as a coil spring is used to increase the coefficient of friction against the log. It consists of an elastic roll integrally formed with a wire rod, or a large number of piercing bodies are integrally formed on the outer periphery, and as the piercing roll rotates, the raw wood is rotationally driven while the piercing bodies are stuck to the outer periphery of the log. something is generally known.

[Problems to be Solved by the Invention] However, in the veneer lace of the type in which the raw wood is rotationally driven by the elastic rolls described above, the rotational driving force of the raw wood is caused by the pressure contact between the outer peripheral surface of the raw wood and the elastic roll. Since it is highly dependent on the generated frictional force, it is difficult to obtain a high rotational driving force of the raw wood, and the elastic roll tends to become brittle and easily break due to the frictional heat accompanying the frictional force. In particular, there is an elastic O-
If a piece of wood or the like that is thicker than the width that allows elastic deformation of the roll enters, the piece of wood or the like will not be ejected out of the veneer lace as the elastic roll rotates, but will remain stuck between the two.
Since the elastic member continues to rotate in a state where it is largely elastically deformed, the frictional heat generated in the elastic roll becomes extremely high, and the elastic roll is easily broken. Furthermore, even if an elastic roll is integrally provided with a metal wire, it can obtain a slightly higher rotational driving force than the above-mentioned elastic roll and can cope with frictional heat. It was difficult to cut the veneer while ejecting it outside the veneer race. Furthermore, in the case of a type in which the veneer is ground while the piercing body is attached, a high rotational driving force can be obtained, but on the other hand, puncture marks of the piercing body are formed on the veneer being cut, and the veneer is damaged. In addition to deteriorating the quality of the veneer, when a piece of wood or the like enters the veneer, the pricking o-ru does not deform elastically, making it impossible to remove the wood piece from the veneer lace while cutting the veneer.

[Means for Solving the Problems] In view of the above-mentioned conventional drawbacks, an object of the present invention is to be able to cut a veneer while rotating the raw wood with a high rotational driving force, and to avoid damage when wood chips etc. enter. Another object of the present invention is to provide a veneer lace that can be used to cut a veneer while removing wood chips and the like.

For this reason, the present invention provides a veneer race that cuts a veneer with a cutting knife that moves toward the outer circumferential surface of a rotating log, which is rotatably supported, and at least the tip thereof is inclined in a predetermined direction with respect to the rotation direction. The veneer lace is constructed by providing a log drive roll that has a large number of elastically deformable metal elastic bodies and rotates the log by pressing the metal elastic bodies against the outer peripheral surface of the log.

[Operation of the Invention] According to the present invention, as the log drive roll rotates, at least the tip portion thereof is inclined in a predetermined direction with respect to the rotation direction of the log drive roll, and a large number of elastically deformable metal elastic bodies are attached to the log. Cutting a veneer from a raw wood using a cutting knife that is brought into pressure contact with the outer peripheral surface and moves toward the outer peripheral surface of the raw wood while driving the raw wood to rotate in a desired direction by the rs friction force between the metal elastic body and the raw wood. is possible. When driving log rotation,
Because the metal elastic body is elastically deformed, it is possible to cut high-quality veneers with less or no damage to the veneer being cut compared to conventional veneer lace, which rotates the raw wood with a stabbing roll. . Further, since the elastic body is made of metal, it is possible to obtain a higher rotational driving force than a conventional veneer lace equipped with a log drive roll made of an elastic body such as hard urethane. When a piece of wood or the like enters between the raw wood and the raw wood drive roll, the metal elastic body is arranged to be inclined in a predetermined direction with respect to the rotational direction of the raw wood drive roll. It is possible to deform more elastically than a log drive roll made of veneer, and it is possible to cut the veneer while discharging the wood chips etc. to the outside of the veneer lace.

[Example] Hereinafter, an embodiment will be described according to one embodiment of the present invention.

In FIG. 1 showing an outline of the veneer race, FIG. 2 showing the mounting state of the log drive roll on the drive shaft, and FIG. 3 showing the outline of the log drive roll, the main body frame (not shown) of the veneer race 1 is A pair of opposing spindles (not shown) are attached so as to be movable back and forth in the axial direction. The spindle chucks the supplied log 3 at approximately the center of the butt end surface. A tool rest 5 is supported on the main body frame so as to be movable in a direction perpendicular to the axis of the spindle, and the tool rest 5 is provided with a feed screw (not shown).
are connected, and the tool rest 5 is moved as the feed screw rotates.

A cutting knife 7 is attached to the spindle side of the tool rest 5, and the cutting knife 7 has a cutting edge that substantially corresponds to the axis of the spindle and is parallel to the axis. Then, the cutting knife 7 is moved to the tool rest 5 as the knife rotates.
is moved toward the outer peripheral surface of the rotating log 3, thereby cutting a veneer S having a required thickness according to the amount of movement of the tool post 5. A drive shaft 11 is rotatably supported by a support frame 9 provided on the tool rest 5 slightly above the cutting edge of the cutting knife 7 .

An electric motor (not shown) is connected to the drive shaft 11, and as the electric motor is driven, the drive shaft 11 is rotated in the direction of the solid line arrow shown in FIG.

A large number of log drive rolls 13 are fixed to the drive shaft 11 at required intervals in the axial direction of the drive shaft 11. A fixed roll 15 constituting a part of the log drive roll 13 is attached to the drive shaft 11, and a large number of mounting grooves 17 are formed on the outer periphery of the fixed roll 15 in the rotational direction relative to the centrifugal direction of the fixed roll 15. For example, it is formed at an angle of approximately 45 degrees. A large number of elastically deformable leaf springs 19 constituting an elastic metal body are fixed to each mounting groove 17 in a state inclined in the direction of rotation of the fixed roll 15. The leaf spring 19 is elastically deformed as it is pressed against the outer peripheral surface of the log 3, and rotates the log 3 in the direction of the solid line arrow shown in FIG. 1 as the drive shaft 11 is driven.

A veneer discharge passage 21 is provided between the cutting edge of the cutting knife 7 and the log drive roll 13, and the veneer S cut by the cutting knife 7 as the log 3 rotates is It is discharged to the outside of the veneer lace 1 via the veneer discharge passage 21.

A plurality of pressure pars 23 are fixed to the support frame 9 between the log drive rolls 13, and the pressure pars 23 are attached to a holder 2 fixed to the support frame 9.
5, and a pressure tip 27 attached to the tip of the holder 25. And the pressure par 23
When cutting the veneer S, the pressure tip 27 is brought into pressure contact with the outer circumferential surface of the raw wood 3 corresponding to the vicinity of the cutting edge of the cutting knife 7 to prevent tip cracking of the raw wood 3 by the cutting knife 7.

A log idling mechanism (not shown) is connected to the spindle, and the log idling mechanism moves the chucked log 3 prior to cutting the log 3 at a speed substantially synchronized with the circumferential speed of the log drive roll 13. At the same time, when the log 3 is being cut, the transmission of rotational force to the spindle is stopped, or the application of rotational driving force to the log 3 is continued.

Regarding the structure and operation of this log idling mechanism, please refer to JP-A No. 5
Since it is described in detail in No. 3-91499, its explanation will be omitted.

Next, the function of the veneer lace having the above structure will be explained with reference to FIGS. 1 and 4.

First, to explain the normal cutting operation, in FIG. 1, after a centered log 3 is chucked at its core position by a spindle, the log 3 is rotated by the log drive which rotates as the log idling mechanism is driven. It is rotated so as to substantially match the circumferential speed of the roll 13. When the tool post 5 is moved to the log 3 (Ill) as the feed screw rotates, the rotating log drive roll 13 presses the tip of the leaf spring 19 against the outer circumferential surface of the log 3. Board splash 1
The log 3 is rotated in the direction of the solid line arrow shown in FIG. 1 by the frictional force generated by the pressure contact with the log 9 and the rotational force of the spindle. At this time, the leaf spring 19 is elastically deformed as shown in FIG. 1 as the log 3 is pressed against the outer peripheral surface. When the turret 5 is further moved by a fixed amount in accordance with the rotation of the feed screw, the cutting knife 7 advances toward the outer circumferential surface of the log 3 and cuts the required thickness from the log 3 according to the amount of movement of the turret 5. A veneer S consisting of a veneer is cut away. At this time, the pressure tip 27 is applied to the raw wood 3 according to the vicinity of the cutting edge of the cutting knife 7.
Since the outer circumferential surface of the veneer S is compressed and deformed by applying pressure, it is possible to effectively restrict the tip cracking of the raw wood 3 caused by the cutting knife 7, thereby reducing the formation of back cracks in the veneer S to be cut.

When the log 3 is rotationally driven by the log drive roll 13,
Frictional heat is generated in the leaf spring 19 as it rotates in pressure contact with the outer periphery of the log 3, but this frictional heat is radiated as the leaf spring 19 rotates because the leaf spring 19 is made of metal.

Next, in FIG. 4, which shows a state in which a piece of wood or the like has entered between the outer circumferential surface of the log 3 and the leaf spring 19 when the log 3 is rotationally driven by the leaf spring 19, the space between the outer peripheral surface of the log 3 and the leaf spring 19 is When the piece of wood 31 enters, the leaf spring 19 further elastically deforms depending on the thickness of the piece of wood 31, and allows the piece of wood 31 to pass through while pressing its tip against the piece of wood 31. Thereby, the leaf spring 19 can rotate the log 3 while discharging the wood piece 31 to the outside of the veneer lace 1.

In this way, in this embodiment, the leaf spring 19, which is attached in an inclined state in the rotation direction of the log drive roll 13, is brought into pressure contact with the outer peripheral surface of the log 3, and the log 3 can be rotated with a high driving force. When a piece of wood 31 enters between the rotating leaf spring 19 and the outer peripheral surface of the log 3, the chain leaf spring 19
It can be elastically deformed depending on the thickness of the wood piece 31 to allow the wood piece 31 to pass therethrough. Thereby, even if a piece of wood 31 enters, it is possible to cut the veneer S while removing the piece of wood 31.

In the above explanation, a large number of leaf springs 19 are attached to the outer peripheral surface of the fixed roll 15 in a state that is inclined in the rotation direction of the log drive roll 13, but as shown in FIG. Chain leaf spring 1 with leaf spring 19 attached
An elastic rubber 35 that can be elastically deformed, such as hard urethane rubber, may be integrally molded with the tip of 9 slightly exposed.

In the above explanation, a large number of leaf springs 19 are attached to the outer circumferential surface of the fixed roll 15 in a state inclined in the rotation direction of the log driving roll 13. It may be installed in a state where it is inclined in the direction opposite to the rotation direction of the log drive roll 13. In addition, as shown in FIGS. 6(A) and (8), the tip of the leaf spring 19 extending linearly in the centrifugal direction of the fixed roll 15 is rotated in the rotational direction of the log drive roll 13 or in the opposite direction to the rotational direction. The chain plate spring 19 may be bent to substantially tilt the chain plate spring 19.

In the above explanation, the metal elastic body is formed by the leaf spring 19, but as shown in FIG. It may be 33. In this case, the direction of inclination of the needle-like bodies 33 may be set in the direction opposite to the direction of rotation of the log drive roll 13, as described above.

In the above explanation, a large number of leaf springs 19 are attached to the fixed roll 15 in a rotating direction or in a state tilted in a direction opposite to the rotating direction. However, as shown in FIG. The bent portion 35 may be attached by being filled with hard urethane so that the end portion of the bent portion 35 is located on the peripheral surface side so that the portions can be easily elastically deformed. In this case, if the base end is fixed to the outer circumferential surface of the fixed roll 15, the plate spring 1 is
9 is elastically deformed in the direction opposite to the rotation direction, and the chain plate spring 19
There is a risk that the chain leaf spring 19 may be deformed at the base end due to an excessive load acting on the base end of the chain leaf spring 19. However, with the above configuration, the leaf spring 1
It is possible to prevent the leaf spring 19 from deforming by absorbing the stress acting on the base end portion of the leaf spring 9 by elastic deformation of the bent portion 35.

Furthermore, in the above description, a large number of log drive rolls 13 are arranged at required intervals in the axial direction of the drive shaft 11, but the log drive rolls 13 that apply rotational driving force to the log 3 include: It may be a single length consisting of the axial length of the log 3 in the core direction. In this case, the log driving roll 13 is arranged at a position other than a position slightly above the cutting edge of the cutting knife 7 with respect to the rotation direction of the log 3, for example, in pressure contact with the outer peripheral surface of the log 3 on the opposite side of the cutting knife 7. Of course, it can be carried out even in possible positions.

[Effects of the Invention] As described above, the present invention is capable of cutting the veneer while rotating the raw wood with a high rotational driving force, and when wood chips etc. enter, the veneer can be removed while removing the wood chips etc. It is possible to provide a veneer lace that can be removed.

[Brief explanation of drawings]

Fig. 1 is a side view schematically showing the veneer lace, Fig. 2 is an explanatory view showing how the log drive roll is attached to the drive shaft,
FIG. 3 is a perspective view schematically showing the log drive roll, FIG. 4 is a side view showing the function of the veneer lace, and FIGS. 5 to 8 are explanatory views showing modified embodiments. In the diagram, 1 is veneer lace, 3 is raw wood, 7 is cutting knife, 1
3 is a log drive roll, 15 is a fixed roll, 19 is a leaf spring constituting an elastic metal body, and S is a single plate. Figure 1 Figure 2 Figure 8

Claims (5)

[Claims] (1) In a veneer race that cuts a veneer veneer with a cutting knife that moves toward the outer circumferential surface of a rotating log, the veneer race is rotatably supported and at least the tip is inclined in a desired direction with respect to the direction of rotation. A veneer lace comprising a log drive roll that has a large number of elastically deformable metal elastic bodies and rotates the log by bringing the metal elastic bodies into pressure contact with the outer peripheral surface of the log. (2) The veneer lace according to claim 1, wherein the metal elastic body is made of an elastically deformable leaf spring. (3) The veneer lace according to claim 1, wherein the metal elastic body is made of an elastically deformable needle-like body. (4) The veneer lace according to any one of claims 1 to 3, wherein at least a tip end of the elastic metal body is inclined in the direction of rotation of the log driving roll. (5) The veneer lace according to any one of claims 1 to 3, wherein at least the tip of the elastic metal body is inclined in a direction opposite to the rotational direction of the log driving roll. .