JP2541568B2 - Veneer lace with clipper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention includes an outer peripheral drive roller for rotating a raw wood, and a thin plate-shaped rotary veneer continuous by a blade while rotating the raw wood by the outer peripheral drive roller. The present invention relates to a veneer lace with a clipper that obtains this rotary veneer and cuts the rotary veneer into a predetermined width by a clipper (cutting mechanism).

(Prior Art) Conventionally, in a cutting and stacking system arranged in series as shown in FIG. 5, a so-called rotary veneer is continuously cut from a raw wood into a thin plate and sent out by a veneer lace LV. Is conveyed by a conveyor CV to a clipper CL provided at a position farther than the veneer lace LV, and a single plate V of a predetermined width is conveyed.
After being cut into sheets, the sheets were further conveyed to and stacked on a stacker system K (stacking device) provided separately from each other via a conveyor CK.

In this case, if the veneer race LV and the clipper CL move independently of each other, the cutting accuracy deteriorates, so it is necessary to make the speed of the clipper CL follow the speed of the veneer race LV.

Then, for example, in order to adjust the rotation speed of the blade of the clipper CL according to the change in the cutting speed of the rotary veneer, a speed adjusting mechanism using a speed sensor for detecting the cutting speed of the rotary veneer by the veneer race LV is provided. ing.

The conveyor CK that conveys the veneer V cut by the clipper CL is formed so as to increase the conveying speed and separate the gap between the veneers V to facilitate the sorting and stacking action by the next stacker K.

Regarding the veneer lace, Japanese Patent Application No. 60-2956
As shown in Japanese Patent Application Laid-Open No. 62-264908, there is provided an outer peripheral drive roller that abuts on the outer periphery of the raw wood to rotate the raw wood. This outer peripheral drive roller is driven by a single drive motor to drive a power transmission mechanism. There is one in which a high-quality veneer veneer (rotary veneer) can be obtained by driving the blade via a blade to keep the cutting speed of the blade constant.

(Problems to be solved by the invention) However, in the cutting and stacking system arranged in series as described above, when cutting a rotary veneer continuously manufactured from veneer lace with a clipper, a speed sensor is used. Even if the speed adjustment mechanism used is used, the cutting error is ± ± for the rotary veneer carried out at a speed of 60 to 100 m / min.
It is difficult to reduce the thickness to 10 mm or less, and the production line is extremely long, and a large installation area is required, which has been a problem.

Therefore, in view of the above-mentioned problems, the present invention does not require a large installation area for cutting a single plate by integrally incorporating a clipper on the rotary veneer outlet side of the veneer race described above, and the veneer An object of the present invention is to provide a veneer race with a clipper having an improved cutting accuracy by providing a drive force transmission mechanism that connects the drive shaft of the outer peripheral drive roller of the race with the rotary knife of the clipper and the rotary shaft of the lower roll. Is.

(Means for Solving Problems) In order to achieve the above-mentioned object, the present invention rotates a raw wood by an outer peripheral drive roller, and a veneer race to continuously obtain a rotary veneer from the raw wood by a blade, A clipper provided on the rotary veneer outlet side of the veneer race and provided with a rotary knife and a lower roll capable of contacting the blade edge of the rotary knife, a drive shaft of the outer peripheral drive roller, and rotation of the rotary knife and the lower roll. A veneer race with a clipper is configured by a driving force transmission mechanism that is connected to a driving shaft.

(Operation) According to the above-mentioned configuration, the rotary veneer continuously cut from the outer circumference of the raw wood by transmitting the driving force from the driving shaft to the outer circumference driving roller provided on the outer circumference of the raw wood is the outlet of the veneer race. The rotary veneer is sent to the side of the veneer race and is introduced between the rotary knife of the clipper provided on the exit side of the veneer race and the lower roll to be cut into a veneer having a predetermined width.

In this case, since the rotary knife of the clipper and the rotary shaft of the lower roll are connected to the drive shaft of the outer peripheral drive roller by the drive force transmission mechanism, the rotation speed of the outer peripheral drive roller, that is, the rotary single plate is changed by the speed change of the drive shaft. Even if the cutting speed (the feeding speed of the rotary veneer) is changed, the rotational speeds of the rotary knife and the lower roll are changed by the same change rate, so that the veneer having a predetermined width can be accurately cut.

(Embodiment) An embodiment of the present invention will be described with reference to FIGS.

FIG. 1 shows an overall configuration diagram of a veneer race with a clipper according to the present invention.

The veneer race is provided with outer peripheral drive rolls 2, 2 which come into contact with the opposite parts of the outer periphery of the raw wood W. These outer peripheral drive rolls 2, 2 are appropriately driven by the drive shaft 4 of the drive means, such as a sprocket chain. The driving force is transmitted via the transmission mechanism C so as to rotate in the direction of the arrow in the drawing. Then, the outer circumference drive roll in which the raw wood W is brought into contact with the outer circumference S thereof
The rotary single plate VR is continuously cut in the direction of the arrow from the outer periphery S by a blade (not shown) while the center position O is held by 2,2.

The frame 3 on the outlet side of the rotary veneer VR of the veneer race is provided with a gear box 6 for accommodating a drive force transmission mechanism 5 directly connected to the drive shaft 4 of the outer peripheral drive rollers 2,2. A rotary shaft 10 of a rotary knife 9 and a rotary shaft 12 of a lower roll 11 are directly connected to the output shafts 7 and 8 arranged above and below the gear box 6, respectively.

FIG. 2 is an exploded view of the gear mechanism in the gear box 6.

The input shaft 14 on the side of the gearbox 6 is connected to the drive shaft 4 of the outer peripheral drive rollers 2, 2 through the sprocket chain 13 and each sprocket wheel, and the gear ratio is the same as that of the gear 15 pivotally mounted on the input shaft 14. The output shaft 8 and the intermediate shaft 16 are connected via the gear 17 provided on the lower output shaft 8 and the intermediate shaft 16 which mesh with each other.
Is configured so as to be directly connected to the drive shaft 4.

On the extension line of the output shaft 8 at the bottom, the coupling 22
The rotating shaft 12 of the lower roll 11 is directly connected via the.

In addition, the shift gears 18, 18 capable of transmitting the rotation of the intermediate shaft 16 to the upper output shaft 7 by selecting a gear ratio are used.
To select the rotational speed ratio between the drive shaft 4 and the output shaft 7 by moving them in the direction of the arrow along the splines 20 provided on the upper output shaft 7 and meshing with the respective gears of the intermediate shaft 16. It is configured to be able to.

A rotary knife 9 is directly connected to an extension of the output shaft 7 via a coupling 21.

Then, the shift lever 19 is used to drive the drive shaft 4 and the output shaft 7.
When the rotation speed ratio between and is selected, the ratio between the cutting speed of the rotary veneer VR cut from the raw wood W and sent out in the direction of the arrow by the rotation drive of the outer peripheral drive rollers 2 and the rotation speed of the rotary knife 9 is selected. , The cutting width of the single plate V is selected.

Here, below the rotary veneer VR and the veneer V, rollers and the like for movably supporting the rotary veneer and the veneer V are provided.

Then, the cut veneer V has the outer peripheral drive roller 2 and the lower roll while the blade edge of the rotary knife 9 is on the upper side.
It is sent out on the conveyor by the rotary veneer VR which is sent by the rotation of 11.

As described above, the rotary shaft 10 of the rotary knife 9 and the rotary shaft 12 of the lower roll 11 are the drive shafts 4 of the outer peripheral drive rollers 2, 2.
Since the gears are gear-coupled with each other, the rotational speeds of the outer peripheral drive rollers 2,2, the rotary knife 9 and the lower roll 11 change at the same rate according to the speed change of the drive shaft 4, and therefore the outer peripheral drive rollers 2,2 The rotation speed ratio between the rotary knife 9 and the lower roll 11 is always kept constant. Thereby, the veneer V having a predetermined width can be obtained.

It should be noted that it is of course possible to change the tooth ratio of the shift gears 18 and 18 to obtain a single plate having a different cutting width.

Next, the clipper 23 shown in FIGS. 3 and 4 will be described.

The rotary knife 9 shown in FIG.
Of the rotary veneer from the gearbox 6 provided on the frame 3 provided on the outlet side of the rotary veneer, the output shaft 7 and the coupling 21 are provided in the horizontal direction orthogonal to the feeding direction of the veneer V (the direction of introducing the rotary veneer VR). Rotating shaft 10 directly connected via
It is screwed on the extension line.

Then, the output shaft head 24 fitted in the coupling 21 is inserted.
While the spring 28 is mounted between the hollow portion 25 of the spline shaft provided in the and the recessed portion 27 provided in the right shaft head 26 of the rotating shaft 10 connected to the coupling 21, the left shaft head of the rotating shaft 10 is mounted. A bearing 34 is provided between the inner ring 31 into which the spline 30 formed in 29 is inserted and the bearing receiver 33 of the bearing stand 32 mounted on the frame 3 to support the inner ring 31 slidably to the left and right, and the left shaft. Head
A spiral cam (35) that abuts against the spring (29) and causes a transition stroke in the axial direction with the rotation of the rotary shaft (10) and a stroke cam (36) meshing with the spiral cam (35) are provided. As a result, a reciprocating mechanism in which one stroke length shifts and returns per revolution of the rotary knife 9
37 are composed.

It should be noted that the gear ratios such that the rotary knife 9 and the lower roll 11 are in phase by the selection of the shift gears 18, 18 described above, for example, the rotation speed ratio of the rotary knife and the lower roll 11 are 1: 1, 1 :. When it is possible to select a tooth number ratio of 1.5 and 1: 2, as shown in FIG. 4, the contact position between the blade edge 38 of the rotary knife 9 and the lower roll 11 is the lower roll.
The roll block 39 forming the contact surface of the blade edge 38 of the rotary knife 9 is set so as to be slightly displaced from the center line XX of the vertical direction 11 toward the front side with respect to the rotation direction, and the roll block 39 made of urethane rubber or polyethylene resin is used. It is formed into a replacement type block. As a result, it is possible to use the roll block 39 twice for each roll block 39 due to the displacement of the knife blade edge 38 only by changing the roll block 39 back and forth in the rotating direction.

Of course, it does not matter if the outer circumference of the lower roll 11 is formed from the same material as the roll block 39, such as urethane rubber, over the entire circumference.

The veneer lace with clipper 1 of this example is configured as described above, and the raw wood W is rotated while being held at the center position O by the outer circumference drive rollers 2, 2 which are brought into contact with the outer circumference S thereof, and the blade ( (Not shown), the rotary veneer VR is continuously cut from the outer circumference S in the direction of the arrow shown in the figure, and the rotary veneer VR is provided with a rotary knife 9 provided on the outlet side of the rotary veneer and a lower roll 11 abutting against the rotary knife 9. The rotary single plate VR is cut into a predetermined width by the rotation of the rotary knife 9 and the lower roll 11 whose rotary shaft is connected to the drive shafts of the outer peripheral drive rollers 2 and 2 and is cut into a predetermined width. The board V is obtained.

In this case, since the rotary shafts of the rotary knife 9 and the lower roll 11 are driven by the drive shaft 4 for driving the outer peripheral drive rollers 2,2 via the sprocket chain 13 and the gear box 6, the rotary single plate VR cutting speed (circumferential speed of raw wood) and rotary knife 9 and lower roll 11
The ratio to the rotation speed of the single plate V is always held at the same value. Therefore, the single plate V having a predetermined width can be accurately cut, and the variation in the cutting width of the single plate V can be eliminated.

Also, the cutting width of the single plate V can be arbitrarily selected by selecting the shift gear 18.

Furthermore, when cutting, the rotary knife 9 is attached to its rotary shaft.
Since a sharpness maintaining means for shifting in the axial direction of 10 is additionally provided, the effect of smoothing the cutting action is great.

(Advantages of the Invention) Since the present invention has the above-mentioned configuration, it has the following advantages.

(1) Since the cutting mechanism by the clipper is integrated on the veneer lace veneer exit side, there is no need to set a long line for veneer cutting, and a large installation area is not required, which greatly contributes to cost reduction. What you can do.

(2) Since the driving of the rotary knife and the lower roll of the clipper and the driving of the outer peripheral driving roller of the veneer race are performed by a common driving shaft, the cutting speed of the raw wood obtained by the outer peripheral driving roller and the rotation of the rotary knife and the lower roll are obtained. The ratio with the speed can always be kept constant, and the precision of the cutting dimension of the veneer can be made very high. Further, the cutting size of the single plate can be arbitrarily selected.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an embodiment of a veneer lace with a clipper of the present invention, FIG. 2 is a configuration diagram of a synchronous drive mechanism, FIG. 3 is an assembly configuration diagram of a rotary knife, and FIG. 4 is a cutting mechanism by a clipper. FIG. 5 is a configuration diagram of a veneer race and a cutting and stacking system according to a conventional technique. 1 …… Veneer lace with clipper 2 …… Outer peripheral drive roller 4 …… Drive shaft 5 …… Drive force transmission mechanism 6 …… Gear box 9 …… Rotary knife 11 …… Lower roll 23 …… Clipper cutting device 37 …… Reciprocating mechanism 38 …… Blade edge VR …… Rotary single plate V …… Single plate

Claims (1)

(57) [Claims] 1. A veneer race for continuously rotating a raw wood from the raw wood by a blade while rotating the raw wood by an outer peripheral drive roller, and a rotary knife and the rotary veneer provided on the rotary veneer outlet side of the veneer race. A veneer race with a clipper, comprising: a clipper having a lower roll that can come into contact with the cutting edge of a knife; and a driving force transmission mechanism that connects the drive shaft of the outer peripheral drive roller and the rotary shaft of the rotary knife and the lower roll.