JPS59150706A - Material wood outer-circumference drive type 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] This invention relates to an improved veneer lace.

Conventionally, the cutting part of the Noveña lace consists of a blade and a fixed part, and in some cases, the fixed part is replaced with a roller/"(-, but in any case, the power is exclusively transmitted through the spindle that holds the raw wood.) The problems with such conventional veneer lace are as follows.

The first thing to point out is that it is unsuitable for cutting hard logs, soft logs in the center, and logs with cracks, which may damage the chuck part and make power supply impossible, or the log may break and cutting becomes impossible. This is a point where it becomes This is due to the high cutting resistance and the fact that power is supplied to the cutting force through the inside of the log over a long distance from the center of both ends of the log to the cutting part, which significantly reduces the material yield. The second problem is the occurrence of troubles due to blade clogging, which often occurs with logs that are cracked or rotten, reducing the operating rate of the equipment and the material yield.

Such problems are certainly related to the quality of raw wood, and therefore, in order to exclude raw wood that is difficult to cut with conventional veneer lace, raw materials have been selectively received under the names of materials suitable for plywood and materials unsuitable for plywood. . However, the raw wood situation has changed dramatically, and we are now forced to accept the inclusion of considerably low-quality raw wood. In an era when raw wood could be easily sorted into suitable and unsuitable wood, veneer lace gave the impression of a nearly perfected device. Even now, even if some unsuitable materials are mixed in,
It seems that there are not many problems with veneer lace because unsuitable materials are used for other uses such as lumber based on quick empirical judgment.

However, the objective reality is that it is a serious loss, and the above-mentioned problems cannot but be pointed out as a fundamental and serious drawback of the conventional veneer lace. If you dare to measure again,
Some are configured to rotate the roller bar, but this is only to prevent the roller bar from acting as resistance to cutting the log, and it does not provide much power to the log. This is clear and trivial from the fact that the straight Ti of roller bars that have been put into practical use is extremely thin and is driven with an extremely small power capacity. Thirdly, there are other problems that will be clarified as each effect of the present invention is described, and will be pointed out through the description of the present invention.

Veneer lace is an important part of the plywood manufacturing process that converts raw wood into different products such as veneer and I'p board. Depending on the quality of the veneer lace, the material yield changes significantly, which determines which logs are suitable and which logs are unsuitable, which greatly affects the flow of subsequent processes and the quality of the product.

This is how the present invention works. It was developed based on this recognition, and it solves the conventional problems and allows smooth cutting of hard logs, soft logs in the center, and logs with cracks that are difficult to cut with conventional veneer laces. The purpose of this project is to provide a veneer lace driven around the outside of raw wood that can predict the future need for use of miscellaneous wood and adapt to it.The details are as follows.

The basis of the veneer lace of the present invention is a structure in which the power for cutting the log is actively supplied from the outer periphery of the log, and moreover, it is supplied from the cutting edge of the cutter to the outer periphery of the log just before cutting. The power supply medium is a suitably shaped log drive roll;
It is somewhat larger in diameter compared to the conventional thinking roller bar,
Its handling position is somewhat higher than the cutting edge of a knife, and it is driven by an electric motor or the like, which actively supplies power to the raw wood.

It should be noted that i? which comes into contact with the log on the outer periphery of the log driving roll? The R portion does not necessarily have to be continuous in the axial direction, and may be thinned out appropriately in the axial direction, thereby reducing the radial force on the log, which was a drawback of conventional roller bars. A significant reduction in pressure can be achieved.

The first effect is that the power transmission path in the log part is extremely short, and the cutting part and the power supply part are almost the same and circular. Since it is located on the periphery, there is little difference in the materials between the two parts and between them, and there is no large moment of force generated in the power supply section as in the past, which prevents the log from being driven or destroyed. can be significantly improved.

For example, experiments have shown that even when a crack 8 that runs through the entire length of a log 1 is intentionally formed, as shown in Figure 1, the log 1 is processed as smoothly as when there is no crack at all. I was able to cut it to In Figure 1, 2 is a knife, 3
is a drive roll having a large number of protrusions 4 on its outer periphery.

In addition, the log drive roll in the present invention needs to be somewhat larger in diameter than the conventional roller bar due to power supply, and since it has an actively driven structure, the cutter and the log drive roll The flow through the outlet of the veneer veneer formed during this process is significantly smoothed, and therefore there is almost no risk of small pieces clogging.For example, in the case illustrated in Fig. However, with the veneer lace of the present invention, power is reliably supplied to the small pieces 1a, so the probability of the blade becoming jammed is significantly lower than in the past. It has become less.

Therefore, the range of applicable logs that can be smoothly made into veneers by veneer lace is expanded at once, and it is possible to improve the material yield, the effective use of resources, and the operating rate of the equipment.

Furthermore, the veneer lace of the present invention is characterized in that the log driving peripheral speed of the log driving roll is 1 normal higher than the idling peripheral speed or the driving peripheral speed by a log rotation mechanism provided separately from the log driving roll to idle or drive the log. By setting the cutting speed to a high value, smooth cutting and effective use of power are achieved. It is also possible to stop the veneer lace, which facilitates synchronization with the veneer lace itself and simplifies the mechanism of the veneer lace itself.

According to the experimental results at the current stage, there is still room for further research regarding the overall quality of the veneer veneer obtained by the veneer lace of the present invention. The effect of cutting raw wood, which is called unsuitable wood and turning it into veneer veneer, is tremendous, and the economic effect is extremely significant.

Next, the veneer lace of the present invention will be described in detail along with preferred embodiments as follows; however, the drawings and explanations only describe four parts for illustration, and the parts that can be easily implemented using known techniques are as follows: Omit it as much as possible to avoid complication.

That is, as a preferred embodiment of the veneer lace of the present invention,
As illustrated in FIG. 1, a drive roll 3 having a large number of protrusions 4 on the outer periphery is used as a raw wood drive roll, and the drive roll 3 is placed at a position slightly below the cutting edge of the cutter 2, at a position below the raw wood 1. The rotation axis of the drive roll 3 is placed at a position where the lee 16 is taken from the line 5 connecting the rotation axis and the cutting edge of the cutter 2, and the path of the veneer veneer 7 immediately after cutting is created between the cutter 2 and the drive roll 3. At the same time, as illustrated in FIG. 3, a drive mechanism 12 for the drive roll 3 for supplying power to the outer circumference of the log 1 immediately before cutting and a drive mechanism 12 for the drive roll 3 are provided separately from the drive roll 3 to idle the log 1. Alternatively, the log rotation mechanism 9 such as a spindle drive mechanism that drives and moves the log rotation mechanism 9 is provided, and the log drive circumferential speed by the drive roll 3 is controlled by the log rotation mechanism 9 such as a spindle drive mechanism that drives and moves the log 1! The peripheral speed is usually set higher than the idling circumferential speed or driving circumferential speed of the rotation mechanism 9, and the cutter 2 is moved from the center of the log 1 in faithful relation to the rotation of the log l (spindle 28) as usual. It has a structure equipped with a feeding mechanism 27 for moving in the direction, and reference numerals 10 and 13 in the figure are electric motors.

According to the device with this structure, since the log rotation mechanism is provided, the tool rest can be brought close to the log while the log is idling at the start of cutting, and the power supply by the log drive roll can be controlled. It can be started smoothly.

Of course, since a feeding mechanism is provided that is faithfully related to the rotation of the raw wood, it is possible to machine a veneer veneer having a uniform thickness even after the power supply by the raw wood drive roll is started.

In addition, it is difficult to accurately match the idling circumferential speed of the log and the circumferential speed of the log drive roll, and if the idling circumferential speed of the log is higher than the log drive circumferential speed of the log drive roll, the In this case, there is a transition from high speed to low speed, and the drive is not smoothly transitioned, and cutting resistance is also generated almost simultaneously, resulting in the brake being applied in a crisis. In some JR trains, there are inconveniences such as idling due to damage, or having an adverse effect on the cut surface of the plywood tit board. However, according to the above configuration, the idling circumferential speed of the log rotation A structure is Since the circumferential speed of the raw wood drive is set high, at the beginning of cutting, the transition from low speed to high speed occurs smoothly, and at least the cutting resistance that occurs at the critical stage of cutting is reduced. On the other hand, since the driving force from the log drive roll acts effectively,
There is little possibility that the above-mentioned inconvenience will occur, and overall good cutting can be performed.

The cutting speed after the start of 9 cuts is determined by the ratio of the driving force by the log drive roll and the drive force by the log rotation mechanism to the cutting resistance. For example, the driving force by the log drive roll is If the cutting resistance is sufficient, the circumferential speed of the log drive by the log drive roll will be approximately the same, and conversely, if the driving force of the log rotation mechanism is sufficient to meet the cutting resistance, the circumferential speed of the log drive by the log rotation mechanism will be approximately the same. However, in any case, it is preferable that the difference in circumferential speed be small.

Furthermore, it is preferable to make the driving force of the log drive roll relatively large because it will reduce the degree of damage to the chuck part of the log, but even if the driving force of the log drive roll is significantly smaller than the drive force of the log rotation mechanism. However, since the log drive circumferential speed of the log drive roll is set higher than the idling peripheral speed of the log rotation mechanism, the driving force from the log drive roll can be used to assist log cutting, and of course the blade This is effective because it effectively prevents clogging.

Further, the log rotation mechanism is not limited to a log rotation mechanism consisting of a spindle drive mechanism, etc. 5 For example, as illustrated in FIG.
A log rotation mechanism 15 configured to rotate the log L7 by transmitting the signal to the outer peripheral surface of the log L via the L7 or the like may also be used.Furthermore, a log contacting member such as a rotating roll of the log rotation mechanism having the above-mentioned configuration may be used. It is also possible to have the function of preventing the warp of the log, but I would like to point out that since the method and position of power supply for cutting the log is different from that of the traditional veneer lace, it is possible to prevent the warp of the log. The preferred location for accessing the parts that serve the purpose is also different from conventional veneer lace.

Furthermore, if the driving force of the log drive roll is larger than the cutting resistance, the log rotation mechanism 9 may be equipped with an overrunning device ll, as illustrated in FIG. 3, for example.
Alternatively, it is equipped with an automatic cut-off mechanism for the power source that automatically cuts off the drive of the power source of the log rotation mechanism in response to a load greater than the room or the start of driving the logs by the log drive roll. It is convenient to prevent the log rotation mechanism from interfering with cutting, and there is no problem in providing the log rotation mechanism with a slippery part such as a torque limiter. In the case of the log rotation mechanism, the contact portion between the log contacting member such as the rotating roll 16 and the outer periphery of the log can be a slipperable portion.

Also, depending on the shape of the log, etc., the idle circumferential speed may be increased more than the set speed due to the inertia energy of the log. For example, as illustrated in FIG. Equipped with a running device 14, the drive roll 3 can be increased in speed to a simple C1i, thereby preventing a fight phenomenon caused by a difference in circumferential speed caused by inertial energy of logs.
Cutting using the inertial energy of the log is advantageous because there is very little risk of destroying the log.

Further, as in the embodiment, if the log drive roll is a drive roll having a large number of protrusions on the outer periphery, power can be supplied accurately, which is extremely effective. 1. As a specific example of position L, as illustrated in FIG. If it is provided at a position where it bites into both the outer periphery of the raw wood and the veneer mini l board 7 immediately after cutting, a notch is formed from the surface of the veneer lace 7 by the protrusion 4 of the driving roll 3, and By driving the drive roll 3, the veneer veneer 7 immediately after cutting is stretched somewhat in the discharge direction and stretched at a regulated rate, so that a good veneer veneer 7 with little curl is produced. It was discovered during the experimental process that this was the case. In addition, the experimental results clarified the remarkable difference between when the drive roll is driven and when it is driven, but in any case, the veneer veneer with less curl is
What is gained from the cutting process in veneer lace is extremely advantageous in streamlining plywood production.

Of course, the protrusions of the drive roll do not necessarily have to be continuous in the axial direction, and can be thinned out in the axial direction, for example, as illustrated in FIG. In the example shown in FIG. 4, the protrusions 4 are thinned out by forming a groove-like space 31. In this case, the portion including the protrusions 4 is a disk,
The shaft 29 can be accessed in a replaceable manner, making it easy to process and assemble the drive roll and the protrusion, and the groove-shaped space provides room for other members. In the figure, 18 is a bearing, and 19 is a chain wheel.

Further, in order to reduce the pressing force while reducing the cutting damage to the raw wood, it is preferable that the protrusions are approximately parallel to the axial direction, as illustrated in FIG. 4, but they are not limited to such a form. , there is no practical problem as long as it is in a form that can be press-fitted into the outer circumference of the log.

Furthermore, conventional drive mechanisms for logs include drive and 4'?
Il-, (7) for. Friction plate crack, f□. f3 < There is a torque limiter, its structure and the torque limiter
However, the purpose and effect are completely different, and the reason is that the log drive roll and the log drive circumferential speed by the log drive roll are controlled by the log rotation mechanism. This is intended to clarify that the original effect can be produced only in combination with a drive mechanism that is normally set higher than the circumferential speed or driving circumferential speed.

This is about the veneer lace of the present invention and its modified examples.
Here are some concrete structures. But in any case,
It is highly effective in solving the problem of wood destruction and blade clogging during cutting, and enables smooth cutting of wood, etc., which was previously considered unsuitable for plywood, as well as for cutting of miscellaneous trees or small-diameter trees expected in the future. The effective cutting of LT (LT) is an extraordinary effect, and it also contributes to a significant productivity improvement, especially in the cutting process in the plywood manufacturing process.

[Brief explanation of the drawing]

The drawings are for explaining the veneer lace of the present invention, and FIGS. 1 and 2 are side cross-sectional views of the cutting part, FIG. 3 is an explanatory view of the drive system, and FIG. 4 is a front view of the drive roll. It is a diagram. 1...Log, 2...Knife, 3...Drive roll, 4
・・War body, 9, 15 ・Log rotation mechanism, 12・・
・Driving roll drive mechanism, 27 Φ current feed mechanism Patent applicant Meinan Seisakusho Co., Ltd.

Claims (1)

[Claims] A log drive roll of an appropriate shape, such as a drive roll having a large number of protrusions on the outside, is provided at a position slightly above the cutting edge of the cutter, and between the cutter and the log drive roll, immediately after cutting, In order to form a path for the intermediate veneer board and to supply power to the outer periphery of the log immediately before cutting, the log drive roll is provided with a drive mechanism, and the log is idly rotated or driven separately from the log drive roll. A log rotation mechanism such as a spindle drive mechanism is provided, and the log drive peripheral speed of the log drive roll is normally set higher than the idling peripheral speed or drive peripheral speed of the log rotation mechanism. A veneer lace driven around the outer circumference of logs.