JPH0630402Y2 - Peripheral drive roller for raw wood in veneer lace - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a peripheral drive roller for raw wood in veneer lace.

[Prior Art] At least two driving rollers are pressed against the outer peripheral surface of the raw wood and are synchronously moved toward the axis of the main shaft to supply a part or all of the driving force from the outer circumference of the raw wood. In the conventional veneer lace, the entire drive roller is made of a metal roller, and a large number of small special marks or ridges are provided on the surface of the drive roller in order to enhance the transmission efficiency of the driving force.

Therefore, since the raw wood is point-contacted and rigidly pressed and held by the metal drive rollers, as shown in FIG. 6, the drive rollers R1, R2 and
Each driving roller R1 is so arranged that the shortest lengths r1, r2, r3 reaching the outer peripheral surface of R3 gradually increase along the rotation direction of the raw wood W in correspondence with the plate thickness t of the veneer veneer 30 to be cut. , R2, R3 must be arranged on the spiral curve corresponding to the cross-sectional shape of the raw wood W at the time of cutting, there is a problem that a veneer veneer with a constant thickness cannot be cut. In addition, the veneer veneer that is cut by a large number of projections or ridges provided on the surface of the drive roller has roller marks, and the veneer veneer with the remaining roller marks cannot be used as the skin of the veneer plate and is Since the driving roller is in point contact with the driving roller, slippage occurs between the driving roller and the driving roller, resulting in poor transmission efficiency of the driving force from the outer circumference.

[Problems to be Solved by the Invention] The present invention makes it possible to elastically deform the surface layer portion of the drive roller by pressing force to press and hold the raw wood in a surface contact state so that the raw wood is securely held and the cutting state thereof is improved. Along with
The main purpose is to prevent the roller marks of the driving roller from remaining on the veneer veneer to be cut.

[Means for Solving the Problems] In the present invention, a large number of driving rollers for supplying a driving force from the outer circumference of a raw wood are formed by baking rubber on the outer circumference of a metal bar shaft which can be fitted to the roller shaft. A single rubber roller is attached to the roller shaft in a detachable manner, and a spacer having a diameter smaller than the diameter of the rubber roller is interposed between the rubber rollers so that the outer rubber of the rubber roller is elastically deformable. It is an outer peripheral drive roller of a raw wood in a veneer race configured to be in surface contact with the outer circumference of the raw wood.

[Embodiment] FIGS. 1 to 5 show a veneer race of a type in which a part of the driving force is supplied from the outer circumference of the raw wood by synchronously moving two driving rollers toward the axis of the main shaft. The drive roller used is shown.

The drive roller R is formed by fitting a large number of rubber rollers 2 on a metal roller shaft 1 via spacers 3 at predetermined intervals. The rubber roller 2 is made by baking rubber on the outer periphery of the core metal 4. An annular shallow groove 5 is provided at both ends of the rubber roller 2. The rubber roller 2 is fixed to the metal roller shaft 1 by the key 6.

The two drive rollers R1 and R2 having the above-described structure are configured to move synchronously toward the axis of the main shaft via the synchronous moving means. The synchronous moving means will be described.

A slewing gear 1 concentric with the spindle 11 in a spindle stock (not shown)
2 is provided, and this slewing gear 12 has two synchronous gears 13
Are substantially opposed to each other and meshed with each other, and swing frames 15 are attached to the respective shafts 14 to which the respective synchronous gears 13 are fixed,
The drive rollers R1 and R2 are respectively attached to the tip ends of the swivel frames 15.
Is rotatably attached.

A rack 16 is meshed with the orbiting gear 12, and a cylinder 17 connected to the rack 16 is operated to turn the orbiting gear 12 in the direction of arrow P.
Swivel frames 15 swivel in a direction in which they approach each other,
As a result, the drive rollers R1 and R2 move synchronously toward the axis of the main shaft 11.

On the other hand, chain gears 18 are concentrically attached to the shafts 14, respectively, and a chain 21 is applied to the chain gears 20 attached to the drive shaft 19 of the drive motor M and the chain gears 18, respectively.
The rotation of the drive motor M is configured to be transmitted to the drive rollers R1 and R2 via the chain gear 18, the drive force transmission means (not shown) provided on the shaft 14 and the swivel frame 15.

The shortest lengths r from the shaft center of the main shaft 11 to the outer peripheral surfaces of the drive rollers R1 and R2 are equal to each other without being different from each other like a metal drive roller, and the peripheral speed of the raw wood W and each drive. The peripheral speeds of the rollers R1 and R2 are always the same. In the figure, 22 is a roller bar for pressing the raw wood W immediately before cutting, 23 is a blade, and 24 is a cut veneer veneer.

Then, the drive motor M is activated to drive each drive roller R1,
When R2 is rotated and the cylinder 17 is operated to gradually rotate the turning gear 12 in the direction of arrow P, the drive rollers R1 and R2 press the raw wood W by the hydraulic pressure of the cylinder 17, and in this state A driving force is supplied from the outer circumference of the raw wood W by the drive rollers R1 and R2, and a driving force is also supplied from a chuck (not shown) that holds both end faces of the raw wood W to rotate the raw wood W.

Here, each of the driving rollers R1 and R2 is keyed in series at predetermined intervals via a spacer 3 in which a large number of rubber rollers 2 are formed on a metal roller shaft 1 with a diameter smaller than that of the rubber roller 2. As shown in FIG. 5, the log W
Since the outer diameter of the rubber roller 2 is larger than the outer diameter of the spacer 3 due to the pressing force, elastic deformation of the surface layer portion thereof is allowed, and the raw wood W and the rubber roller 2 are brought into surface contact with each other.
As a result, the raw wood W is reliably held along the up-down direction Q by the two drive rollers R1 and R2 that face each other in the up-down direction, and is also held along the direction R substantially perpendicular to the up-down direction Q. Therefore, the holding state of the raw wood W is reliable and stable. The surface layer of the rubber roller 2 is still elastically deformed and the raw wood W
Since the rubber roller 2 and the rubber roller 2 are in surface contact with each other, the shortest length r from the shaft center of the main shaft 1 to the outer peripheral surfaces of the drive rollers R1 and R2 is made equal to each other without being different from each other unlike a metal drive roller. However, the log W and the drive rollers R1 and R2 do not come into contact with each other. However, theoretically, as shown in FIG. 6, the outer peripheral shape of the raw wood W at the time of cutting is such that the shortest length from the axial center of the main shaft to the outer peripheral surface of the raw wood W becomes the maximum immediately before cutting. Since it has a spiral curve, it is understood that the elastic deformation rate of the rubber roller 2 of the upper drive roller R1 near the blade 23 in the rotational direction is larger than that of the rubber roller 2 below.

In this way, the raw wood W and the rubber roller 2 are in surface contact with each other, and the friction coefficient of the rubber roller 2 is larger than that of the metal roller, so that the raw wood W can be held securely and stably, and between them. Since there is almost no slippage, the efficiency of transmitting the driving force from the outer circumference of the log W is high. Therefore, the raw wood W can be cut in a stable state. Further, unlike the metal roller, the surface of the rubber roller 2 is not provided with projections or ridges and is smooth, so that no roller mark is left on the veneer veneer 24 to be cut.

In particular, in the drive roller R of this embodiment, the rubber roller 2 is intermittently fitted in a series on the metal roller shaft 1 via the spacer 3 having a small diameter that allows the elastic deformation of the surface layer portion thereof. Both ends are open. Therefore, when the rubber roller 2 receives a compressive force as its reaction force when the raw wood W is pressed, the rubber roller 2 can extend in its axial direction without being constrained. Therefore, there is an advantage that the contact area between the raw wood W and the rubber roller 2 is sufficiently secured.

[Advantages of the Invention] (1) By elastically deforming the surface layer portion of the rubber roller that is integrally fitted to the outer periphery of the metal roller shaft to press the raw wood in a surface contact state, the raw wood is pressed in the pressing direction of the drive roller and Since it is possible to hold from both sides of the right angle,
Secures and stabilizes logs. As a result, the raw wood is cut well.

(2) The rubber roller and the log are in surface contact, and since rubber generally has a larger coefficient of friction than metal, slippage between the log and the rubber roller is almost eliminated, and therefore the transmission efficiency of the driving force from the outer circumference of the log is improved. Get higher

(3) Unlike the metal roller, the surface of the rubber roller fitted on the outer circumference of the metal roller shaft is smooth without any protrusions or ridges, so the veneer veneer to be cut is a roller. There are no traces.

(4) Since the surface layer of the rubber roller fitted on the outer circumference of the metal roller shaft is elastically deformed and the raw wood and the rubber roller come into surface contact, the minimum length from the shaft center of the main shaft to the outer peripheral surface of each rubber roller is set to the metal. Even if they are equal to each other without making them different from each other like a roller, the raw wood and each rubber roller do not come into a non-contact state. Therefore, a mechanism for changing the position of each drive roller with respect to the axial center of the drive roller according to the thickness of the veneer veneer to be cut becomes unnecessary.

(5) The drive roller has a structure in which a large number of single-sized rubber rollers having rubber burned on the outer circumference of a metal core that can be fitted to the metal roller shaft are detachably and integrally fixed. Therefore, it is easy to attach and detach the rubber roller, handle it, and assemble the drive roller.

[Brief description of drawings]

FIG. 1 is a front view of an outer peripheral drive device for a raw wood equipped with a drive roller according to the present invention, and FIG. 2 is each drive roller R1,
A front view of the synchronous moving means of R2, FIG. 3 (a) is a front view in which a part of the drive roller R according to the present invention is cut away, and FIG. 3 (b) is an enlarged cross section taken along line X-X of the same (a). Figures and 4
FIG. 5 is a perspective view of an outer peripheral drive device for a raw wood equipped with a drive roller according to the present invention, FIG. 5 is an explanatory view showing a state in which a driving force is transmitted from the drive roller to the raw wood in a surface contact state, and FIG. 6 is a metal roller. FIG. 3 is a principle diagram of an outer peripheral drive device using a log. R: drive roller 1 ... metal roller shaft 2 ... rubber roller 3 ... spacer 4 ... core metal W ... log

Claims (1)

[Scope of utility model registration request] 1. A driving roller for supplying a driving force from the outer circumference of a raw wood, and a plurality of single-sized rubber rollers in which rubber is baked on the outer circumference of a metal core that can be fitted to the roller shaft. Along with being able to attach and detach the key to the roller shaft in series,
An outer peripheral drive roller for a veneer race in a veneer race in which a spacer having a diameter smaller than the diameter of the rubber roller is interposed between the rubber rollers to elastically deform the outer peripheral rubber of the rubber roller so as to be in surface contact with the outer periphery of the raw tree.