JPS6345930B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a veneer lace, and in particular improves the installation configuration of a scoring knife, and its purpose is to prevent the blade from clogging and other cutting troubles when cutting logs. In order to provide a reliable veneer lace and to cope with the deterioration of the raw wood situation in recent years, we aim to make cutting smooth and good even with inferior raw wood.

Conventionally, the scoring knife for veneer lace faces the cutting part composed of a raw wood cutting knife and a pressure bar, and a suitable tool is attached to the pressure bar side so as to score the surface layer of the cut raw wood from the outer circumferential surface. It is customary to install it by means,
It is well known that when cutting raw wood using a veneer lace equipped with a scoring knife, cutting troubles called so-called blade jamming frequently occur. Therefore, this trouble tends to occur frequently near the cutting part where the scoring knife is located, and it significantly interferes with both the functions of cutting the veneer with the cutting part and marking with the scoring knife. be. especially,
In spite of the fact that the effect is remarkable in the technique of adding a thread inserting function to a scoring knife and reinforcing it at the same time as cutting the veneer, as in Japanese Patent Publication No. 51-31559, The reality is that this has become a mere theoretical theory due to the frequent occurrence of cutting troubles.

The present invention is configured to rationally solve the above-mentioned conventional defects and to prevent the frequent occurrence of the above-mentioned cutting troubles.The characteristic structure is that the scoring knife is used for cutting logs constituting the cutting part. This is because the cutting edge is installed on the knife side with the cutting edge facing in the direction opposite to the rotational direction of the raw wood while being interposed in the raw wood cutting knife.

The present invention will be specifically described below based on the illustrated embodiments.

As illustrated in FIGS. 1 to 4, a scoring knife 1
is placed at an appropriate position in the longitudinal direction of the log cutting knife 3, with the cutting edge facing the direction opposite to the rotation direction of the log, with the cutting edge interposed on the log cutting knife 3, and attached to the tool rest 4 by the presser plate 2. Install it to hold it. The raw wood cutting knife 3 is similarly held on the tool rest 4 by a presser plate 5.

As illustrated in FIG. 1, it is preferable that the scoring knife 1 is held with its blade interposed in the log cutting knife 3 so that the blade is sandwiched between the log cutting knives 3. A suitable method can be used, such as by drilling a groove in the cutting knife 3 (not shown) and attaching the scoring knife 1 to the groove in a detachable manner, or by forming the scoring knife integrally with the raw wood cutting knife. What is necessary is to configure the scoring knife to be interposed in the raw wood cutting knife. Furthermore, it is desirable that the cutting edge of the scoring knife 1 be positioned near the cutting edge of the log cutting knife 3, as illustrated in the figures.

The position of the scoring knife 1 in relation to the raw wood cutting knife 3 is changed depending on the position where the raw wood is to be used.

That is, if the cutting edge of the scoring knife 1 is configured to extend toward the rake face side of the log cutting knife 3, as illustrated in FIGS. In this way, the scoring knife 1 functions on the portion of the log just before cutting (near or intervening in the cutting section).

For example, as illustrated in FIGS. 2 and 4, if the cutting edge of the scoring knife 1 is configured to extend toward the flank side of the log cutting knife 3, unlike the above example,
The scoring knife 1 functions on the raw wood at a position one rotation ahead (at a position separated from the cutting part by the outer circumference of the raw wood).

Although not shown in the drawings, if the scoring knife 1 is configured to extend from the cutting edge of the wood cutting knife 3 to both the rake face side and the flank side, for example, half of the cutting will be performed at the preceding position. The remaining half functions near the center.

Also, in Figures 3 and 4, the above-mentioned
This is an example of making a veneer reinforced with veneer lace using threads 6, as in Publication No. 31559, and the scoring knife 1 is used to cut a veneer that is a percentage of the thickness of the veneer to be cut. It has the well-known thread insertion function of forming a deep cut groove and sequentially inserting the thread 6 into the cut groove through holes or grooves formed in the scoring knife 1, as illustrated by the arrows. Furthermore, looking at both of the above examples, in the example shown in Fig. 3, the thread 6 is embedded from the back side of the veneer to be cut, but in the example shown in Fig. 4, it is inserted into the surface at a position one rotation ahead. Empty thread 6 is embedded.

Therefore, according to the former, it is possible to carry out the veneer after cutting while it is supported by the threads 6 from below, and according to the latter, the outer circumferential surface of the raw wood is always held down by the threads 6. This makes it possible to cut raw wood, and proactively prevents the chipping of fragile raw wood.

As described above, in any of the embodiments of the present invention, a scoring knife is provided on the log cutting knife side constituting the cutting section, and the scoring knife is interposed at an appropriate position in the longitudinal direction of the log cutting knife. Since the scoring knife is installed in a hidden position during cutting of the log, it will not touch the surface of the log near the cutting part, which may cause cutting troubles. There are very few. In other words, as mentioned above, by functioning in the hidden position (position) of the scoring knife, it may promote the loss of wood chips that occur on the outer circumferential surface of the raw wood and cause cutting troubles, or it may Even if there is a chip, it can be prevented from being related to the piece of wood, and it is possible to significantly reduce the occurrence of cutting troubles that conventionally occur frequently at the cutting part near the position where the scoring knife is installed.

As described above, the present invention has developed a veneer lace that is free from cutting troubles by rationally solving the above-mentioned conventional defects, and thus greatly contributes to the improvement of the plywood industry.

[Brief explanation of drawings]

The drawings show an example of the implementation of the present invention, with FIG. 1 being a perspective view and FIGS. 2 to 4 being side views. 1... Creasing knife, 2, 5... Pressing plate, 3...
Knife for cutting logs, 4...turret, 6...thread.

Claims (1)

[Claims] 1. A veneer lace characterized in that a scoring knife is provided at an appropriate position in the longitudinal direction of the log cutting knife, with the cutting edge facing in the direction opposite to the rotational direction of the log, while being interposed in the log cutting knife. .