JPS5919007B2 - veneer lace - Google Patents

Description

[Detailed description of the invention] The present invention relates to improvements in veneer lace.

Conventional veneer laces are unsuitable for cutting soft logs in the center or logs with cracks or rot, and may cause problems such as the chuck spinning, making it impossible to supply power, or the log breaking, making cutting impossible. It had drawbacks.

In addition, when cutting logs with cracks or rot, the blades often become clogged (which reduces the operating rate of the equipment and the quality of the product).
In addition, it had a number of drawbacks, such as the generation of abnormal loads due to blade clogging, which caused the log to be destroyed.

In order to overcome these drawbacks, the inventor of the present invention developed a peripheral drive type veneer race as disclosed in Japanese Patent Application No. 52-6288 (see Japanese Unexamined Patent Publication No. 53-91499) (corresponding to the original patent application of the present application). However, the present invention further limits the structure of the veneer lace, that is, in order to match the circumferential speed of the chucked raw wood with the circumferential speed of the rotating roll that pierces the outer periphery of the raw wood and transmits the driving force, the rotating roll The invention is characterized in that an overrunning device is provided in the drive mechanism.

An example of implementation of the present invention will be described below with reference to the drawings.

The veneer lace of the present invention includes a driving member having a large number of protrusions 4 around the periphery, as illustrated in FIGS. 1 and 2, for example;
For example, a rotating roll 3 in which a large number of circular saw-shaped drive members 12 are arranged at appropriate intervals in the axial direction is connected to a cutting blade 2.
substantially parallel to the cutting edge line (tip of the cutting edge), and also the piercing body 4
is the original document 1 near the cutting edge of the cutting tool 2 during cutting.
- is provided at a practical position, and a pressure member such as a fixed bar 6 or a roller bar is disposed in a plurality of spaces between the driving members 120 of the rotary roll 3 in a completely divided manner, for example, as shown in FIG. As illustrated in FIG. It is characterized by being equipped with a running device 16.

For example, as illustrated in FIGS. 1 and 2, the piercing body 4 around the drive member 12 is provided with a cutter extending substantially parallel to the axial direction, thereby cutting the outer periphery of the raw wood and the veneer veneer 7. It has the effects of less actual damage and high wood driving ability, but it is not limited to these shapes, but as long as it is a shape that can be punched around the outer circumference of the wood, it can be put to practical use at a value commensurate with the shape. be.

Further, the rotating roll 3 has a shape in which a plurality of circular saw-shaped driving members 12 having a large number of protrusions 4 around the periphery are arranged at appropriate intervals in the axial direction, and a groove-like space 5 is formed between each driving member 120. The groove-like space 5 has a size in which at least a part of the pressure member such as the fixing bar 6 can be positioned.

Further, the position of the rotating roll 3 may be such that the stabbing body 4 around it is located in a position that is above the cutting edge of the cutting knife 2 in the direction of rotation of the wood, and that substantially only the outer periphery of the wood 1 can be stabbed, for example. As illustrated in FIG. 1, the piercing body 4 is provided at a position where it can punch both the outer circumference of the raw wood, which is above the cutting edge of the cutting knife 2 in the rotational direction of the raw wood, and the veneer veneer immediately after cutting. There are basically two types of cases, and in the latter case in particular, a tengu effect occurs in the veneer veneer, making it possible to produce a veneer veneer with less curl.

Further, the pressure members such as the fixed bar 6 are for compressing the vicinity of the cutting edge of the cutting tool 2 for the same purpose as in the case of the conventional veneer lace. It has a plurality of gaps 14 for positioning the driving member 12 of the rotating roll 3, and a plurality of small piece fixing bars are arranged at appropriate intervals, or a plurality of gaps are provided in the fixing bar, and the above-mentioned This allows an interference relationship with the rotating roll 3.

In particular, according to the fixing bar 6 in the embodiment, the raw wood 1 is partially compressed in shape, but if the size or proportion of the void at the compressed end of the raw wood is below a certain level, the veneer can be easily compressed. The effect on the quality of the board is extremely small.

In FIG. 1, reference numeral 8 indicates a pressure device, and reference numeral 17 indicates a peeling member for removing pieces of raw wood, waste, etc. from the plywood veneer 7 from the piercing body 4.

Further, as illustrated in FIG. 3, the drive mechanism 9 for the rotating roll 3 has a motor 13 or other power source, and a variable speed motor can also be used.

In addition, the spindle drive mechanism 10 that allows the output torque of the spindle 11 to be adjusted is, for example, using a DC motor 15 or other various motors as a power source, and adjusting its current limit value using a variable resistor 15a. There are many options, such as electrical control, interposing an electromagnetic clutch in the drive mechanism 10, controlling the applied voltage using a variable resistor, and limiting the output torque by slipping the electromagnetic clutch. Well-known techniques can be easily utilized.

In other words, it is important that the spindle drive mechanism 10 of the present invention limits the output torque of the spindle 11 to below a certain level, and is also adjustable as desired.

In addition, the overrunning device 16 provided in the drive mechanism 9 of the rotating roll 3 is composed of a one-way clutch or a cam clutch, etc., and when torque in the direction of increasing speed acts on the rotating roll 3, the overrunning device 16 is configured to increase the speed of the container. Or it will overrun.

The veneer lace of the present invention has the above-described structure, and the raw wood driving ability of the rotating roll can be made extremely high by adjusting the shape and number of the protrusions on the outer periphery, the practical depth to the outer periphery of the raw wood, etc. By making it possible to bring the rotating roll close to the cutting edge of the cutting tool while using a pressure member, an appropriate proportion or all of the power required for cutting logs can be applied to the log near the cutting edge of the cutting tool. It is possible to supply it to the outer periphery, and therefore the quality of the veneer veneer can even be improved, and the possibility of destruction of the log can be significantly reduced.

The rotary roll also has the valuable effect that the protrusions on its outer periphery forcefully push or forcibly send out, for example, pieces of wood between the cutting blade or the wood and the pressure member, and therefore the cutting part It is possible to significantly reduce the occurrence of blade clogging.

In addition, by making the output torque of the spindle adjustable, it is possible to limit the torque applied to the check part of the log, thereby reducing the chuck's idle rotation and damage to the log. The output torque can be increased, for example, the spindle alone, for example the rotating roll alone, or the spindle and the rotating roll together can be used to supply power.

Furthermore, cutting can be started with the log being idly rotated by the spindle drive mechanism, and therefore, the start of power supply by the rotating rolls can also be made smoother.

It is also possible to cut the log by attaching it to the spindle chuck with the log largely eccentric.The spindle output torque is temporarily increased to allow the log to idle, and then the spindle output torque is decreased to prevent the chuck from spinning. It is also possible to take a form of cutting that prevents idle rotation or destruction of logs.

Furthermore, when starting cutting of raw wood, it is actually difficult to accurately match the circumferential speed of the idle rotation of the raw wood by the spindle drive mechanism and the circumferential speed of the rotating roll. By equipping the mechanism with an overrunning device, it is no longer necessary to match the circumferential speeds of both sides accurately, and it is possible to start cutting by setting the idle circumferential speed of the raw wood somewhat higher than the circumferential speed of the rotating roll. Become.

According to the veneer lace of the present invention as described above, it is possible to smoothly cut low-quality logs that are often cracked or rotten, and it is also possible to reduce the diameter of the logs, improving the yield of the logs, It provides great value in improving the yield of veneer veneers, improving the operating rate of equipment, and making effective use of resources by being adaptable to a wide range of qualities of logs.

[Brief explanation of the drawing]

The drawings illustrate an example and an embodiment of the present invention, and FIG. 1 is a side sectional view, FIG. 2 is a front view of FIG. 1, and FIG. 3 is a drive system diagram. 1... Log, 2... Cutting knife, 3.
...Rotating roll, 4...Piercing body, 5...
... Groove-shaped space, 6 ... Fixed bar, 7 ...
...Plywood veneer, 9...Rotating roll 3 drive mechanism, 10...Spindle drive mechanism, 11...
... spindle, 12 ... circular saw-shaped drive member, 14 ... gap, 16 ... overrunning device.

Claims (1)

[Scope of Claims] 1. A rotary roll in which a large number of driving members having a large number of protrusions around the circumference are arranged at appropriate intervals in the axial direction, is arranged approximately parallel to the cutting edge line of a cutting blade, and The piercing body is provided with the outer circumferential part of the raw wood near the cutting edge of the cutting blade during cutting at a position where it can be practically used, and is provided with a drive mechanism for the rotating roll, and is further provided with a plurality of spaces between the driving members of the rotating roll. , a pressure member such as a fixed bar or a roller bar is arranged, a spindle drive mechanism is provided in which the output torque of the spindle can be adjusted, and an overrunning device is further provided in the drive mechanism of the rotating roll. veneer lace. 2. The veneer lace according to claim 1, wherein the rotary roll is provided with a protruding body around the rotary roll at a position where only the outer circumferential portion of the log above the cutting edge of the cutting tool in the direction of rotation of the log can be practically used. 3. A patent claim in which the rotary roll is provided with a protruding body around the rotary roll at a position where both the outer circumference of the raw wood, which is above the cutting edge of the cutting blade in the rotational direction of the raw wood, and the veneer veneer immediately after cutting are both located at practical positions. Veneer lace listed in Range 1.