JPS6153202B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tenderizing device for veneer veneer (hereinafter referred to as veneer) which is cut by a veneer lace or a veneer slicer, etc.
The purpose is to provide a device that makes numerous cuts in a veneer and then bends the veneer on the side opposite to where the cuts were made to form countless cracks. This significantly improves the tenderizing effect of veneer, thereby greatly increasing the yield rate and streamlining subsequent processes such as the cutting process, thereby streamlining work and improving productivity in the plywood manufacturing process. It is intended to be

Now, in a normally cut veneer, the back side of the veneer is slightly longer than the front side due to back cracks that occur during cutting, resulting in a so-called curling phenomenon. Therefore, a method has conventionally been used to offset this curling phenomenon by making cuts on the surface or both sides of the veneer to correspond to the back cracks. However, if only the above-mentioned cut is made, the cutting blade will detach from the veneer and return to its original state due to the elastic return of the veneer, and only the cut of the cutting blade will remain in the veneer. It simply remains in a linear form on the board surface. Therefore, the above-mentioned intended purpose cannot be achieved, and on the contrary, only scars are left behind, and the actual situation is that it is far from being put to practical use.

The present invention effectively solves the conventional problems by forming cuts and countless cracks in the veneer to effectively achieve the purpose of tenderizing. An example of implementation will be explained according to the drawings.

As illustrated in FIGS. 1 to 3, the apparatus of the present invention includes a cutting roll A having a large number of cutting blades 3 protruding from the outer peripheral surface, a feed roll B facing the roll A, and each of the rolls A. , B, a guide member 6 that guides the progress of the veneer C in which a cut (cut groove) C1 is formed by the cutting blade 3, and a regulating member 7 that bends the veneer C. It consists of a carry-out conveyor 8 that carries out the bent veneer.

The cutting roll A has a large number of short cutting blades 3 protruding radially in the axial direction of the roll at equal intervals (or predetermined intervals) on its outer peripheral surface, and the cutting blades 3 have a predetermined length in the axial direction. Provided in multiple rows at intervals. Further, a plurality of grooves 4 into which a part of the regulation member 7 is loosely inserted are provided on the outer circumferential surface of the cut roll A, thereby forming the roll A into an uneven roll. That is, the groove portion 4 is a portion spaced apart from each other in the axial direction of each cutting edge 3, and each cutting edge is provided on a convex portion. On the other hand, a plurality of grooves 1 into which a portion of the guide member 6 is loosely inserted are also provided on the outer peripheral surface of the feed roll B, which is disposed opposite to the cutting roll A with a required spacing therebetween. It is desirable that the feed roll B is made of a rigid body such as iron or a material with little elastic deformation such as hard rubber or resin.

The optimal arrangement of both rolls A and B is to set the interval so that the cutting blade 3 contacts the surface of the feed roll B, but the depth and shallowness of the cut may vary depending on the condition of the veneer C to be cut. Determine. In any case, it is necessary to set the interval so that it can be fed while forming a cut in the veneer, and for example, the interval may be adjusted by using the adjustment device 5 described later. be.

Regarding the driving of both rolls A and B, it is sufficient to drive at least one of them, but for example, as shown in FIG.
Gears 3b, 1b may be provided on the shafts 3a, 1a of B, and both may be driven by driving the shaft 3a with an electric motor 9. Furthermore, as shown in FIG. 5, by providing a cam clutch 1d on the shaft 1a of the feed roll B and equipping it with a gear 1b,
By changing the gear ratio of the gear 1b and the gear 3b of the cutting roll A to some extent, as shown in FIG. 6 (graph), the speed of the feeding roll B is lower than the speed V of the cutting roll A.
If cutting roll A is driven so that the peripheral speed V1 of At step 3, a pulling force acts on the veneer C, resulting in a greater stretching effect.

The guide member 6 is arranged so that the veneer C, which has been pierced by the cutting blade 3 between the cutting roll A and the feed roll B, does not come off the cutting blade 3. It guides the plate C, and a part of it is arranged so as to be loosely inserted into the groove of the feed roll B, and the guide surface 6
b is curved from the groove portion 1 to the apex 6a following the cutting edge line of the cutting blade 3, and is formed so as to move outward from the outer peripheral surface of the cutting roll A from the apex 6a. Further, the regulating member 7 cuts the advancing veneer C by cutting the roll A.
It is bent from the side in the opposite direction (unloading direction), and a part of it is loosely inserted into the groove 4 of the cutting roll A, so that there is a gap between it and the apex 6a of the guide member 6 that allows the veneer C to pass through. The standard surface 7a is disposed to face the distal end of the guide member 6.

Note that the guide member 6 and the regulating member 7 are rigid bodies,
It is fixed by being attached to the machine frame (not shown).

Furthermore, the above-mentioned cutting roll A is not limited to a single roll. For example, as illustrated in FIG. It may also be configured to prevent bending by arranging them in multiple rows. In this case, it is necessary to synchronize the rotational speeds of the cutting rolls A1, but if the feed roll is driven and the cutting roll A1 is driven, there is no need to provide a separate tuning mechanism.

Moreover, as illustrated in FIG. 1, both the rolls A,
If the conveyors 2 and 2a for conveying the veneers to B are provided, the process can be automated.

The adjustment device 5 is used to adjust the gap between the cutting roll A and the feed roll B (a gap corresponding to the actual thickness of the veneer) and to apply pressure for cutting the veneer, as necessary. You can prepare for it. The device may be configured to be adjustable by, for example, a screw, or a combination of a screw and a cylinder or a spring (not shown), and the adjustment may be made for either roll A or B. 1c and 3c in FIG. 4 indicate the bearings, S in FIG. 6 indicates the speed, and T indicates the time, respectively.

Next, the operation of the present invention will be explained as follows.
When the veneer C is inserted between the cutting rolls A and B so that the fiber direction is perpendicular to the conveying direction, the veneer C is cut between the rolls A and B, as illustrated in FIG. It is pierced one after another by the blade 3, and a large number of incisions C1 are formed as shown in FIG. 7, for example. The veneer C is guided by the guide member 6 to the guide surface 6b with the cutting blade 3 stuck therein, and is sent out. However, since the veneer C is forcibly sent out while being held by the cutting blade 3, there is no risk of clogging. Not at all.

When the veneer advances further and reaches the apex 6a of the guide member 6, the direction of movement is changed by the regulating surface 7a of the regulating member 7. That is, while removing the veneer from the cutting blade, the veneer is bent toward the surface opposite to the surface of the cut C1 formed by the cutting blade. When bending, for example, as illustrated in FIG.
Countless cracks C2 are formed from the part where C1 was formed.

As described above, in the present invention, by forming a cut in a veneer and then bending the veneer,
Innumerable cracks C2 occur from the cut C1, which is the weakest part of the veneer, and the more cuts C1 are formed, the more cracks C2 can be formed. In addition, cracks that occur from the cut, for example,
As illustrated in the figure, the cracks from other cuts do not connect in a straight line, but most of them extend in the free direction and are also formed inside the veneer, resulting in a tenderizing effect. It becomes significantly larger. Therefore, unlike when a veneer is bent without notches, there is no fear that the cracks will propagate linearly in the direction of the fibers, resulting in, for example, splitting. Furthermore, since the veneer itself is forcibly fed by the cutting blade, there is no risk of the veneer becoming clogged, and the work flow can be made smoother.

Furthermore, since the bending action of the veneer is substantially performed by a rigid body, cracks are reliably formed and can be made uniform.

Furthermore, since the present invention corrects curling of the veneer and flattens it, it becomes easy to insert the veneer into the next process such as a cutting device, and it also eliminates the need to peel the veneer together using tape or thread in the horizontal stripping process. There is no risk of being
It can be joined to a flat veneer. In addition, as mentioned above, since countless cracks are formed in the veneer, when drying with a dryer, heat is easily transferred from the cracks to the inside, promoting the evaporation of water and significantly improving drying efficiency. By processing the invention,
Since the internal stress of the veneer can be removed, troubles such as distortion and deformation of plywood products can be effectively prevented, and the veneer can be made flexible without causing concentrated stress on the veneer itself. Even when the board is handled manually, damage to the veneer is prevented. In addition, as mentioned above, since countless cracks are formed, the entanglement of the veneer fibers can be weakened, and it is possible to easily stretch the veneer in the direction perpendicular to the fibers and greatly improve the yield. be.

As described above, the present invention solves the conventional problems simply and rationally, has a simple and effective device configuration, and significantly improves the tenderizing effect. It is suitable for use in the plywood industry, and will greatly contribute to improving productivity, work efficiency, and wood resource efficiency in the plywood industry.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention, and FIG. 1 is an explanatory diagram illustrating the main part of the present invention and the state in which a veneer veneer is processed according to the present invention, and FIGS. 2 and 3 are illustrations of a cutting roll. An explanatory diagram illustrating an example, FIG. 4 is an explanatory diagram illustrating the driving state of the cutting roll and the feed roll,
FIG. 5 is an enlarged explanatory diagram showing an example of a feed roll;
FIG. 6 is a graph illustrating an example of the drive relationship between the feed roll and the cutting roll, FIG. 7 is an explanatory diagram illustrating the state of the veneer cut according to the present invention, and FIG. 8 is a graph illustrating the state of the veneer cut according to the present invention. FIG. 3 is an explanatory diagram illustrating the state of crack formation. A, A1...cutting roll, B...feeding roll,
C...Single plate, C1...Crack, C2...Crack,
1, 4... Groove portion, 3... Cutting blade, 6... Guide member,
6a... Vertex, 8b... Guide surface, 7... Regulation member, 7a... Regulation surface, 8... Carrying out conveyor, 9...
…Electric motor.

Claims (1)

[Claims] 1. A cutting roll having a plurality of cutting edges protruding from its circumferential surface at predetermined intervals radially and in the axial direction, and a cutting roll facing the cutting roll at a predetermined interval. A feed roll provided therein, a drive device that rotates at least one of the rolls, and a veneer veneer cut into the veneer by the cutting blade of the cut roll, and a drive device that rotates at least one of the rolls; a guide member for advancing the veneer along the guide member; a regulating member for bending the advancing veneer in the opposite direction from the cutting roll side facing the end portion of the guide member; A veneer veneer tenderizing device comprising an unloading conveyor. 2. The veneer according to claim 1, wherein the cutting blade roll is divided in the axial direction, and the divided short cutting rolls are arranged in multiple rows in the axial direction so that the width is greater than the width of the veneer. Veneer tenderizing equipment.