JPH0442083Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a cutting edge device for a rotary lace used to manufacture veneers by continuously cutting logs while rotating them.

[Prior art] Conventionally, a rotary lace consists of a bed, a sturdy frame on both sides, and a frame attached to this.The spindle and its bearings are housed in the frame, and the log is inserted into a knife with both ends held by the spindle. Rotate against. The knife and pressure bar are attached to a feed base that moves back and forth on the guide surface of the slide at right angles to the direction in which the spindle enters and exits. The advancing speed of the feeder is adjusted by the feeder,
Determining the thickness of the veneer.

Adjusting the pressure bar to the knife is a difficult problem, but the pressure bar has an important relationship with the properties of the veneer surface, and this pressure determines the thickness and surface smoothness of the veneer, so it is difficult to adjust the pressure bar to the desired veneer. Logs are cut by adjusting the gap between the knife and the pressure bar (smaller than the thickness of the veneer) depending on the required performance, such as thickness, hardness, and surface smoothness, and fixing them at a constant interval.

[Problems that the invention aims to solve] By the way, the raw wood situation has worsened in recent years, and it has become difficult to obtain large-diameter, straight-through South Sea wood that is free from knots and rot.
It is becoming necessary to use small-diameter, hard South Sea wood, as well as pines and cypresses from North America and the Soviet Union, which have many knots and have large differences in the hardness and softness of the wood. However, since rotary lace is a conventional device made for cutting large-diameter, straight-through South Sea wood, it is not suitable for cutting logs with many knots or soft and hard woods such as pine and cypress. It is not suitable for equipment that cuts the raw wood while pressing it down with a constant pressure using a knife or pressure bar, and has problems such as the knife edge being damaged when cutting knots and the veneer easily becoming thick and thin. It was hot.

This invention solves the above problems, and its purpose is to minimize damage to the knife edge even if there are hard parts such as knots in the raw wood, and to prevent the cutting edge of the knife from being damaged even if the raw wood has hard parts such as knots. An object of the present invention is to provide a cutting edge device for a rotary lace for the purpose of obtaining a veneer with a small amount of veneer.

[Structure and operation to solve the problem] In order to achieve the above object, this invention uses a rotary lace blade device consisting of a planer stand to which a knife is fixed and a blade head to which a pressure bar is fixed, for cutting raw wood. When the pressure bar is held in a predetermined position relative to the knife's cutting edge, a pneumatic cylinder device with a predetermined pressure is pressed forward against the log from behind the cutting head, and pressure greater than the set pressure is applied to the pressure bar. It consists of a rotary lace cutting device, which features a cutting edge that instantly moves backwards and forwards relative to the raw wood.

[Example] This invention will be described below based on an example shown in the drawings.

In the drawing, 1 is a cutting edge device;
A planer stand 3 and a blade stand 4 are placed on a slide 2,
The planer stand 3 is attached to a spindle (not shown) so that the cutting angle of the contact surface between the knife 5 and the log 6 remains constant even if the cutting angle changes.

On the other hand, the cutting board 4 having the pressure bar 7 moves forward and backward at the same time as the planer board 3, but the cutting board 4 presses the log 6 in the direction of the log 6 with a predetermined pressure using a pneumatic cylinder device 8. When the pressure bar 7 comes into contact with the hard knots of the log 6, pressure is exerted by the knots to push the pressure bar 7 back, but the pressure that is higher than the pressure set by the hardness of the log 6 is applied to the pneumatic cylinder. When applied to the axis of the cylinder device 8 in the direction of the device 8, the air pressure inside the cylinder further increases, but due to the action of a cushion, the pressure bar 7 instantly retreats to avoid the knots in the log 6, and then instantly moves forward. It is attached so that it can return to its original position.

The pressure of the cylinder device 8 against the log 6 is selected in the range of 20 to 100 kg/cm ² depending on the hardness of the tree species and the condition of the nodes.

[Effects of the invention] As described above, according to this invention, when a knot or hard part of the raw wood hits the pressure bar during cutting and a pressure higher than the setting is applied, the pneumatic cylinder acts like a cushion and instantly The cutting edge rest retreats to widen the gap between the pressure bar and the knife, making it easier for the veneer to pass through the gap, reducing the pressure on the knife, preventing damage to the knife, and restoring the pressing force to within the setting. Then, the cutting head instantly moves forward and returns to its original position, so the cutting operation of the log is not interrupted and is efficient.

[Brief explanation of the drawing]

The drawing is an explanatory side view showing a cutting edge device which is an embodiment of this invention. 1...Blade mouth device, 2...Slide, 3...Planer stand, 4...Blade stand, 5...Knife, 6...Log wood,
7...pressure bar, 8...pneumatic cylinder device.

Claims (1)

[Scope of utility model registration request] In a rotary lace cutting edge device 1 consisting of a planer stand 3 to which a knife 5 is fixed and a cutting edge stand 4 to which a pressure bar 7 is fixed, the pressure bar 7 is held at a predetermined position relative to the cutting edge of the knife 5 when cutting logs. There is, but log 6 is from behind the blade holder 4.
The rotary race is characterized in that when pressure is applied forward by a pneumatic cylinder device 8 having a predetermined pressure against the pressure bar 7, and a pressure exceeding the set value is applied to the pressure bar 7, the cutting head holder 4 instantly moves backward and forward relative to the log 6. cutting edge device. ”