JPH0739602Y2 - Veneer lace veneer carry-out device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is a non-contact type detection of the behavior of a veneer carried out from the back of a veneer race when cutting a veneer by rotating a log with the veneer race. TECHNICAL FIELD The present invention relates to a veneer unloading device for veneer lace, which is detected by a device and adjusts the unloading speed of a veneer unloading conveyor.

[Conventional technology]

Conventionally, as an apparatus of this type, there is JP-A-59-11207, "Automatic follow-up apparatus in uniform speed conveying process". According to the present invention, at least a pair of non-contact type detectors having different detection working distances are used to set the upper and lower detection areas of displacement in single-plate transport, and when the displacement is outside this area, the determination circuit is provided. This is a device that adjusts the speed of the conveyor by transmitting an increase / decelerate signal for an arbitrary time.

If a reflection type photocell is adopted for the non-contact type detector, a measurement error will occur due to the difference in tree species and the color change of the sapwood and core material. Since the detection area is only vertically displaced, the single plate can always be conveyed in a stable state.

[Problems to be solved by the device]

When a long log is cut into a certain length, the growth stress accumulated in the growth process is unbalanced and radial cracks are introduced from the bark toward the axis at the end face of the log. When the raw wood is cut with veneer lace, it becomes a veneer in which cracks are randomly formed on both edges of the veneer, and the veneer is likely to be cut from the cracked part when carried out.

That is, in the cracked portion, the crack is widened and the length in the direction orthogonal to the fiber direction of the veneer conveyance direction is extended, while in the non-cracked portion, the length is unchanged. Therefore, when the unloading state of the veneer is detected at one location in the veneer width direction as in the conventional example, for example, if the veneer in the detection portion has many cracks, the veneer length will be extended, resulting in a slack state. The veneer position is lowered, and when the unloading speed is increased, the slack disappears, but the part without cracks is pulled and the veneer position rises, and finally that part is torn to lower the veneer yield. Will be done.

[Means for Solving the Problems]

The present invention solves the above problems with a simple device. In veneer lace, a projector that irradiates a plurality of lines of light parallel to the veneer width direction and in the veneer thickness direction is provided near the edge of the veneer. In the vicinity of the other edge of the single plate, a light receiver having a plurality of light receiving elements facing the light projector is provided.

A detection device, which is a combination of the projector and the light receiver, is provided in the vicinity of the veneer lace single plate unloading end, and the unloading speed of the unloading conveyor is controlled by the control device in response to the output signal of the detection device. .

[Action]

The veneer after cutting, which is carried out as a sheet from the veneer lace, has random cracks, and the veneer position is constantly carried out while changing in the vertical direction. On the other hand, the light that irradiates multiple lines parallel to the width direction of the veneer and in the thickness direction of the veneer can detect the position of the veneer that is the most tense and raised over the entire veneer width. The speed of the carry-out conveyor can be controlled by the control device via the drive motor so as not to pull too much.

〔Example〕

An embodiment of the veneer lace veneer carry-out device of the present invention will be described below with reference to the drawings.

FIG. 1 is a side sectional view for explaining a veneer lace veneer unloading device according to the present invention, and FIG. 2 is a sectional view taken along line CC of FIG.
It is an arrow sectional view.

In FIG. 1, L indicates a raw wood which is being cut by a single plate, and the left and right wood mouth end faces are clamped by chucks (not shown) and driven to rotate in the direction of arrow A. The raw wood L is cut by a blade 11 with the blade edge up, and the blade 11 is tightly held at the tip of a plane 12 having a triangular cross section. The inclined upper surface of the plane is a sliding surface 12a of the cut single plate V.

A pressure bar 13 is tightly held at the tip of the pressure bar body 14 to prevent the tip of the cutting veneer from cracking and to control the thickness, so that the outer peripheral surface of the raw wood L slightly above the cutting edge of the cutting tool 11 can be pressed. There is. On the other hand, a carry-out conveyor 21 is horizontally installed below the plane 12 to carry out the veneer in the direction of arrow B.

Reference numeral 31 denotes a detection device, which is a combination of a light projector 32 having a plurality of light sources 33 and a light receiver 34 having a plurality of light receiving elements 35. The sliding surface 12a end of the upper surface of the plane 12 has a single plate of veneer lace. The projector 32 and the light receiver 34 are sandwiched between the carry-out end portion and the carrying surface of the carry-out conveyor 21 and on the outside in the width direction of the veneer.
Are opposed to each other. Between the light projector 32 and the light receiver 34, a plurality of lines of light 36 are irradiated in parallel with the width direction of the single plate and in the thickness direction of the single plate.

In the present invention, in order to detect the region where the transport veneer is displaced most significantly in the vertical direction, the veneer veneer carry-out end and the carry-out conveyor 21 where the inclined surface and the horizontal plane intersect.
The detection device 31 is installed between it and the transport surface.

38 is a drive motor for the carry-out conveyor 21. The detection signal of the detection device 31 is input to the control device 37, and the control device 37 controls the speed of the conveyor 21 via the drive motor 38 of the carry-out conveyor 21. Further, although not shown, the detection device 31 may be provided on the plane base 12 or the pressure bar body 14 that advances together with the cutting of the single plate.

Note that the detection device 31 is a transmissive type, a so-called multiple light source having a plurality of light sources for projecting a parallel light beam and a plurality of light receiving elements facing the light beam are arranged in a row at a pitch corresponding to the parallel light beam. There are, for example, Tateishi Electric Co., Ltd.-OMRON line sensor F3Z series (trade name) or Sunkus Co., Ltd. area sensor SA-40 series (trade name).

An embodiment of the present invention having the above configuration will be described. Log L
When the raw wood is rotated while cutting the blade 11 by a predetermined amount on the outer peripheral surface of the veneer, the veneer V is cut and moves on the sliding surface 12a of the plane stand 12. Subsequently, the veneer is placed on the carry-out conveyor 21 and carried out in the direction of arrow B. On the other hand, a plurality of lines of light 36 emitted from the projector 32 of the detection device 31 are shielded from the end face in the width direction of the veneer V and the front and back faces at the position where it is transferred from the sliding surface 12a of the plane to the carry-out conveyor 21. Other than the above, the light is received by the light receiver 34, and the result is input to the control device 37.

Based on the detection result of the detection device 31, the control device 37 determines the position where the veneer V is pulled up to the highest position, and the speed of the carry-out conveyor 21 is controlled via the drive motor 38 so that the veneer V is not pulled and does not sag. Will slow down or speed up.

Then, the veneer V is placed on the upper surface of the carry-out conveyor 21 while maintaining a constant carry-out level, and is smoothly fed in the direction of arrow B at a carry-out speed synchronized with the veneer veneer cutting speed.

[Advantage of the Invention] According to the present invention described above, the detection device can detect the position of the veneer that has been pulled up to the highest level over the entire veneer width direction, and accurate tuning can be achieved. It does not tear high-value continuous veneers and increases veneer yield.

[Brief description of drawings]

FIG. 1 is a side sectional view for explaining a veneer lace veneer unloading device according to the present invention, and FIG. 2 is a sectional view taken along line CC of FIG.
It is an arrow sectional view. 11 …… Blade 21 …… Outgoing conveyor 31 …… Detecting device 37 …… Control device L …… Log V… Single plate S …… Crack

Claims (1)

[Scope of utility model registration request] 1. In a veneer race for cutting a veneer from raw wood, a carry-out conveyor provided on the veneer vehicular carry-out side, and a conveyor arranged in the vicinity of one of the left and right ends of the conveyor and in the width direction of the veneer vehicular lace. The veneer lace is a detection device including a projector that emits a plurality of lines of light that are parallel to each other in the thickness direction of the single plate and a photoreceiver that includes a plurality of light receiving elements that receive the light emitted while sandwiching the conveyor. The veneer lacquer unloading device is provided near the veneer unloading end part, and includes a control device that receives a detection signal from the light receiver to control the unloading speed of the unloading conveyor.