JPH07214516A - Raw lumber-driving roll device in veneer lathe - Google Patents

Abstract

PURPOSE:To provide a raw lumber-driving roll device in a veneer lathe in which cutting is surely performed until raw lumber is reduced to small diameter and also a good-quality veneer is produced in large quantity and productivity is increased in comparison with the conventional method. CONSTITUTION:A raw lumber-driving roll 4 is provided in the vicinity of raw lumber 1. The raw lumber-dividing roll 4 is divided respectively and provided plurally, so that a roll part and a piercing body-providing part 6 are alternately arranged. In the roll part, the outside surface is smoothly constituted similarly to an ordinary driving roll. The piercing body-providing part 6 is provided with many piercing bodies. A driving mechanism 7 is provided in the piercing body-providing part 6 and constituted so as to move it in the diametral direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a log driving roll device for veneer lace for cutting a log while rotating the log.

[0002]

2. Description of the Related Art Conventionally, when veneer veneer is cut by rotary type veneer lace, a guide roll and a log drive roll are arranged over the length of the log to support and rotate the log from the outer periphery. By doing so, the bending of the raw wood is prevented and the raw wood is prevented from being spun out due to cutting resistance, so that the raw wood can be cut to a small diameter.

Even when such a guide roll and a log drive roll are used, if the log has a small diameter, the surface frictional force between the roll and the log decreases, and it becomes difficult to generate a rotational force that exceeds the cutting resistance. Therefore, a large number of piercing bodies are also arranged on the surface of the log drive roll.

[0004]

However, in the conventional technique using the above-mentioned piercing body, there is a problem that a puncture mark or a crack of the piercing body is generated in the cut veneer veneer, so that a high-quality veneer cannot be obtained. was there.

In order to avoid such a problem, there is known a device in which a high friction material such as abrasive cloth paper having a coarse grain size is arranged on the outer periphery of the roll instead of the piercing body. Even in the apparatus, if sufficient frictional resistance is generated between the veneer and the log having a small diameter, the veneer may be scratched or the like.

The present invention has been made in response to such a conventional situation, and can surely perform cutting until the raw wood has a small diameter and can produce a large amount of good quality veneer. An object of the present invention is to provide a log driving roll device for veneer lace, which can improve productivity as compared with the above.

[0007]

That is, according to the invention of claim 1, the raw-wood drive roll is brought into contact with the outer periphery of the raw-wood,
In a log drive roll device for rotationally driving the log, the log drive roll has a roll portion whose outer surface is formed smoothly, and a piercing body arranging portion in which a large number of piercing bodies are arranged,
A drive mechanism for relatively moving the roll portion and the piercing body disposition portion in the radial direction is provided, and a portion to be brought into contact with the outer peripheral portion of the raw wood is selectable. Log drive device for veneer lace.

Further, in the invention of claim 2, the drive mechanism drives the piercing body arranging portion by the pressure of gas or liquid, and the raw wood drive roll for veneer lace according to claim 1. apparatus.

Further, in the invention as set forth in claim 3, at the time of starting the cutting of the log, the log drive roll is set in a non-contact state with the log, and thereafter only the roll portion of the log drive roll hits the log. 2. When the raw wood is cut into a small diameter after being contacted with the raw wood, the roll portion of the raw wood drive roll and the piercing body disposition portion are brought into contact with the raw wood. Log drive roll device for veneer lace in Japan.

According to a fourth aspect of the present invention, in a raw-wood drive roll device for rotating the raw-wood drive roll by bringing the raw-wood drive roll into contact with the outer periphery of the raw-wood, the raw-wood drive roll comprises:
A roll portion having a smooth outer surface, a high friction material disposition portion having a high friction material disposed on the outer surface, and the roll portion and the high friction material disposition portion relatively in the radial direction. A raw-wood drive roll device for veneer lace, comprising: a drive mechanism for moving the raw-wood, wherein a portion to be brought into contact with an outer peripheral portion of the raw wood is selectable.

Further, the invention according to claim 5 is characterized in that the drive mechanism drives the high-friction material arranging portion by the pressure of gas or liquid, thereby driving the raw wood in the veneer race according to claim 4. Roll device.

Further, in the invention according to claim 6, at the time of starting the cutting of the log, the log drive roll is set in a state of not contacting the log, and thereafter only the roll portion of the log drive roll hits the log. The roll portion of the raw-wood drive roll and the high-friction material arranging portion are configured to come into contact with the raw wood when the raw wood is cut into a small diameter after being brought into contact with the raw wood. A log driving roll device in the veneer lace described.

[0013]

In the veneered log drive roll device of the present invention having the above-described structure, the drive mechanism causes the drive mechanism to dispose a puncture body arranging portion in which a large number of puncture bodies are arranged or a high friction material arrangement in which a high friction material is arranged. The parts can be set in a state of being brought into contact with the outer peripheral portion of the raw wood and in a state of being separated from each other.

Therefore, for example, when the upper stripped veneer is cut at the start of cutting the raw wood, the raw wood is driven only by the large spindle, and when the front and back veneers are cut, the raw wood is driven by the large spindle and the roll portion of the drive roll. At the time of cutting the core plate and core plate veneer when the raw wood is cut to a small diameter,
The raw wood can be driven by the small spindle, the roll portion of the drive roll, and the piercing body arranging portion (or the high friction material arranging portion).

As a result, it is possible to surely perform cutting until the raw wood has a small diameter, and it is possible to mass-produce high-quality veneer free from scratches caused by the piercing body or the high friction material. Productivity can be improved.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the construction of a log drive roll device for veneer lace according to an embodiment of the present invention.
In the figure, reference numeral 1 is a raw wood, and both ends of the raw wood 1 are supported by a spindle 2 and are driven to rotate. The spindle 2 is composed of a large spindle 2a and a small spindle 2b, and is configured to be able to cope with a change in the thickness of the log 1. Further, a knife 3 for cutting the log 1 is arranged along the longitudinal direction of the log 1.

In the vicinity of the log 1, a log drive roll 4 formed in a substantially cylindrical shape so as to extend along the longitudinal direction of the log 1 is arranged. In this log drive roll 4, roll portions 5 each having a smooth outer surface are arranged in the same manner as a normal drive roll, and piercing body arranging portions 6 in which a large number of piercing bodies are arranged are alternately arranged. Each is divided into a plurality of pieces. A drive mechanism 7 is provided in each of the piercing body arrangement portions 6 so that the piercing body arrangement portion 6 can be moved in the radial direction.

A motor 9 is connected to the log drive roll 4 via a belt 8, and the log drive roll 4 is driven at a speed corresponding to the rotation speed of the spindle 2 and the thickness of the log 1.
Is configured to rotate. The log drive roll 4 is provided with a drive mechanism (not shown) that moves the log drive roll 4 in the direction of the log 1 according to the change in the diameter of the log 1 and abuts the outer circumference of the log 1.

FIG. 2 shows the structure of the drive mechanism 7. In this embodiment, the drive mechanism 7 is pneumatic.
It is configured to drive the piercing body arranging portion 6. That is, as shown in FIG. 3, the drive mechanism 7 includes an air storage portion 7a that is divided into a plurality of pieces in the circumferential direction and is made of rubber or the like and is configured to be expandable and contractible like a tire tube. The air storage portion 7a is expanded and contracted by moving air into and out of the air storage portion 7a through the hollow portion 4b provided in the drive shaft 4a of the log drive roll 4 to expand and contract the air storage portion 7a. The piercing body arranging portion 6 provided at the tip portion is configured to be driven in the radial direction of the log drive roll 4 so as to be set in a state of being projected and retracted from the surface of the log drive roll 4. ing.

Note that, in FIG. 2, for the sake of explanation, one of the two air accommodating portions 7a of the driving mechanism 7 contracts,
Although the other is shown in an expanded state, these air accommodating portions 7a are configured to contract and expand at the same time.
Further, the drive mechanism 7 may be configured to be driven by, for example, hydraulic pressure, or as shown in FIG.
Alternatively, the coil spring 41 or the like may be used for driving.

Next, with reference to FIGS. 5 to 7, a method of cutting a raw wood using the raw wood drive roll device in the veneer lace of this embodiment having the above-described structure will be described. In addition,
In these figures, 50 is a guide roll and 51
Is a drive roll. Further, the following control of the log drive roll device is automatically performed using a microcomputer or the like.

When cutting the log 1, as shown in FIG. 5, first, during the cutting of the stripped veneer, the log drive roll 4 is not brought into contact with the outer peripheral portion of the log 1, and the log 1 is moved only by the large spindle 2a. To drive.

After this, as shown in FIG. 6, when cutting the front and back veneers, only the roll portion 5 of the raw wood driving roll 4 is brought into contact with the outer peripheral portion of the raw wood 1, and the large spindle 2a and the roll portion 5 are used to make the raw wood 1 To drive.

After that, as shown in FIG. 7, when the raw wood is cut to have a small diameter, the middle core plate and the core plate single plate are cut,
Air is sent into the air storage portion 7a of the drive mechanism 7, the piercing body arranging portion 6 is projected and brought into contact with the outer peripheral portion of the raw wood 1, and the small spindle 2b, the roll portion 5 of the raw wood drive roll 4, and the piercing body arrangement. The log 1 is driven by the unit 6.

As a result, it is possible to surely perform cutting until the raw wood 1 has a small diameter, and it is possible to produce a large amount of high-quality veneer free from scratches by the piercing body, which is more productive than the conventional one. It is possible to improve.

In the above-mentioned embodiment, the case where the piercing body is used has been described. However, even if a high friction material such as a coarse-grained abrasive cloth paper is arranged instead of the piercing body, the same effect as in the above-mentioned embodiment is obtained. Can be obtained.

[0028]

As described above, according to the log driving roll device for veneer lace of the present invention, it is possible to surely cut the log until the log has a small diameter, and to obtain a high-quality veneer without scratches. It can be mass-produced and the productivity can be improved as compared with the conventional one.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is an enlarged view showing the main configuration of the apparatus shown in FIG.

FIG. 3 is an enlarged view showing a main configuration of the apparatus shown in FIG.

FIG. 4 is a diagram showing a configuration of another embodiment.

5A and 5B are views for explaining a cutting process using the apparatus of FIG.

FIG. 6 is a view for explaining a cutting process using the device of FIG.

FIG. 7 is a diagram for explaining a cutting process using the apparatus of FIG.

[Explanation of symbols]

 1 Log 2 Spindle 3 Knife 4 Log drive roll 5 Roll part 6 Plunge body arrangement part 7 Drive mechanism 8 Belt 9 Motor

Claims (6)

[Claims] 1. A log drive roll device for rotating a log by bringing the log drive roll into contact with an outer peripheral portion of the log, wherein the log drive roll includes a roll part having a smooth outer surface and a plurality of roll parts. A piercing body arranging portion in which a piercing body is arranged, and a drive mechanism for relatively moving the roll portion and the piercing body arranging portion in the radial direction are brought into contact with the outer peripheral portion of the raw wood. A log drive roll device for veneer lace, characterized in that it is configured so that parts can be selected. 2. The drive mechanism comprises:
The log driving roll device for veneer lace according to claim 1, wherein the log drive device is driven by the pressure of gas or liquid. 3. At the start of cutting a log, the log drive roll is set in a non-contact state with the log, and thereafter only the roll portion of the log drive roll is brought into contact with the log, and then the log is cut. 2. The log driving roll device for veneer lace according to claim 1, wherein the roll part of the log driving roll and the piercing body disposition part are configured to contact the log when the log is cut to have a small diameter. . 4. A log driving roll device for rotating a log by bringing the log driving roll into contact with an outer peripheral portion of the log, wherein the log driving roll has a roll portion having an outer surface formed smoothly and an outer surface. A high friction material arranging portion in which a high friction material is arranged, and a drive mechanism for relatively moving the roll portion and the high friction material arranging portion in a radial direction, and an outer peripheral portion of the raw wood. A raw wood drive roll device for veneer lace, characterized in that it is configured so that a portion to be brought into contact with the car can be selected. 5. The raw-wood drive roll device for veneer lace according to claim 4, wherein the drive mechanism drives the high-friction material disposition portion by the pressure of gas or liquid. 6. At the start of cutting a log, the log drive roll is set in a non-contact state with the log, and then only the roll portion of the log drive roll is brought into contact with the log, and then the log is cut. The log driving roll for veneer race according to claim 4, wherein the roll part of the log driving roll and the high friction material disposition part are configured to contact the log when the log is cut to have a smaller diameter. apparatus.