JPS6121804B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a pressurizing device for veneer lace, and its purpose is to enable smooth cutting without causing blade clogging even during intermittent cutting that occurs in the initial stage of cutting. The purpose is to provide a pressurizing device.

However, in the conventional roller bar type veneer lace, as illustrated in FIG.
There was an inconvenience that smooth cutting could not be performed due to jamming between the two. In order to solve this problem, an attempt was made to drive the roller bar to rotate and forcibly eject the end length veneer, but although the problem due to the blade clogging disappeared, this time the problem between the raw wood and the roller bar continued. It became difficult to match the circumferential speed, so there were pros and cons.

Furthermore, as illustrated in FIG. 2, in the conventional roller bar type veneer lace (see FIG. 1), the roller bar 6 is formed of an elastic material such as rubber, and the rake surface of the cutter 4 is provided with a protrusion 4a. It is also possible to perform tenderizing on the veneer 2 using the roller bar 6 and the protrusion 4a of the cutter 4.
In this configuration, when the roller bar 6 comes into contact with the convex part of the log 1 at the beginning of cutting, the roller bar 6 is elastically deformed and comes into contact with the tip of the blade 4, as illustrated in FIG. This results in breakage of the roller bar.

As described above, the conventional pressurizing device has various deficiencies and leaves considerable problems in practical use.

The present invention solves the various deficiencies of the conventional roller bar pressure device using a simple and rational device.The present invention is characterized by a simple and rational device. Logs that can move forward and backward in the upper direction of the rotation direction of the log in the vicinity, parallel to the rake face of the cutter, or in the direction that intersects the extended surface of the rake face of the cutter and the cutting edge line of the cutter on the upper side of the rotation direction of the log. The reason is that it is provided elastically so as to follow the irregularities of the outer periphery. An example of the implementation of the present invention will be described below with reference to the drawings.

FIG. 4 is an explanatory diagram partially showing the cutting location in a roller bar type veneer lace, in which the cutter 3 is provided so that the cutting edge is located on a horizontal line passing through the center of a chuck (not shown) that clamps the log 1; A freely rotatable roller bar 5 is arranged slightly above the cutting edge. The roller bar 5 is moved forward and backward freely following the irregularities on the outer circumference of the log 1 by a pressure mechanism A consisting of a pressure spring 7 and a reciprocating rod 8, that is, the axis of the roller bar 5 is moved by the reciprocating rod 8. The reciprocating rod 8 is supported by being elastically attached to a holding base 9 via a pressure spring 7.

The moving direction of the roller bar 5 by the pressure mechanism A is the upper direction of the rotation direction of the log 1 near the cutting edge of the cutter 3, and is parallel to the rake face of the cutter 3 or an extension of the rake face of the cutter 3. If the direction intersects the cutting edge line of the cutting tool 3 on the upper side in the rotational direction of the log 1 (hereinafter referred to as the cutting edge direction), that is, the direction that does not directly act on the rake face of the cutting tool 3, no extra force will be applied to the cutting tool 3. A veneer with a good cutting surface can be obtained.

When the log 1 is cut using the veneer race as described above, the roller bar 5 is pressurized and comes into contact with the outer periphery of the log 1 slightly above the cutting edge, so the cutting power from the chuck is transferred through the log 1. It can be received and rotated at the same circumferential speed as log 1. Further, the roller bar 5 is equipped with a pressure mechanism A, and since the pressure spring 7 applies pressure to the outer periphery of the log, the roller bar 5 can move freely forward and backward following the irregularities of the outer periphery of the log in the direction of the cutting edge. Therefore, cutting is performed by the cutter 3, and at the same time, the cut veneer is smoothly discharged by the roller bar 5, which is in contact with the outer circumference of the log and rotates at the same circumferential speed, and is transferred to the pressure mechanism A. Since it is constructed so that it can move forward and backward freely, there is no fear of clogging even if the rear end of the end length veneer 2a and the tip of the following end length veneer overlap, and on the other hand, the end length veneer 2a is always in a pressurized state. Therefore, it is easy to receive the rotational driving force from the outer periphery of the log, and the efficiency of discharging the end length veneer can be increased.
Furthermore, there is no increase in cutting resistance due to blade clogging,
Therefore, the force applied to the chuck is also small, making it possible to cut even fragile logs without any problems.

Next, the embodiment illustrated in FIG. 5 will be described as follows.

In this embodiment, a protrusion 4a is formed on the rake face of the cutter 4 or the rake face of a planer stand that follows the rake face of the cutter 4, and the roller bar is formed of an elastic material such as rubber, or the roller bar is formed on the outer periphery of the roller bar. By covering the roller bar 6 with an elastic body such as rubber and forming a conveyance path for the cut veneer between the protrusion 4a and the roller bar 6, it is possible to cut the veneer at the same time. The plan is to also perform a tenderizing process on the cut veneer.
Of course, the roller bar 6 is also attached to the holding table 9 by the pressure mechanism A so that it can move forward and backward.

According to this device, the cut veneer 2 is bent by the roller bar 6 formed of an elastic body and the protrusion 4a on the rake surface of the cutter 4 in the opposite direction to the curl caused by back cracking. Microscopic cracks occur on the surface of the material, resulting in a tenderizing treatment.

Furthermore, since the roller bar 6 can move forward and backward freely following the irregularities on the outer circumference of the raw wood, it will not only prevent the blade from clogging as in the previous embodiment, but also prevent the blade from clogging due to the elastic deformation of the elastic body itself as in the conventional device. It is possible to prevent damage caused by cutting.

The pressure spring 7 in the first and second examples may be replaced by pneumatic or hydraulic pressure, and the roller bars 5 and 6 may be divided in the longitudinal direction of the raw wood, and the pressure spring 7 may also be divided into the divided roller bars 5, It is very convenient if the roller bar is provided every 6 times, since the roller bar can freely follow the unevenness of the raw wood. Furthermore, by dividing the roller bar in this manner, surface cracks in the cut veneer become intermittent in the longitudinal direction of the raw wood, making it possible to minimize changes in the strength of the veneer.

As mentioned above, the present invention solves the various problems caused by the conventional equipment very rationally and effectively, and also significantly improves the cutting of veneer in veneer lace.The present invention makes a significant contribution to the plywood industry. It is something.

[Brief explanation of the drawing]

Figures 1 to 3 show the prior art.
The figure is an explanatory diagram showing the cutting locations of a veneer lace having roller bars, and FIGS. 2 and 3 are explanatory diagrams showing the cutting locations of a type of veneer lace whose roller bars are formed of an elastic body. Figures 4 and 5 show examples of the present invention, respectively. Figure 4 is an explanatory diagram showing the cutting location of a veneer lace having a normal roller bar, and Figure 5 is an illustration of a case where the roller bar is made of an elastic material. FIG. 3 is an explanatory diagram showing cutting locations of the type of veneer lace. A...Pressure mechanism, 1...Log wood, 3...Knife, 4
...A cutlery with a protrusion 4a protruding from the rake face of the cutter or the rake face of a planer stand that follows the rake face of the cutter,
5...Roller bar, 6...Roller bar formed of an elastic body.

Claims (1)

[Claims] 1. Move a freely rotatable roller bar that contacts the outer periphery of the log to the upper direction of the rotation direction of the log near the cutting edge of the cutter, parallel to the rake face of the cutter, or between the extended face of the rake face of the cutter and the cutting edge line of the cutter. A pressurizing device for a veneer lace, characterized in that it is elastically provided so as to be able to move forward and backward in a direction that intersects on the upper side in the rotational direction of the log, and to follow the irregularities on the outer periphery of the log.