JPH0213612B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for removing cutting waste in a scarf cutting and joining machine for veneer veneer.

a movable blade that enters from the upper side of the carry-in side to the lower side of the carry-out side of a veneer veneer (hereinafter simply referred to as veneer) that is intermittently conveyed in the same direction as the fiber direction and cuts the veneer diagonally; A fixed blade that supports the veneer from below and receives the cutting force of the movable blade, a rear end standby position where the tip faces the unloading side of the fixed blade, and a tip standby position above the fixed blade that supports the veneer from below and receives the cutting force of the movable blade. The veneer's main elements are a damper that is pivoted to swing between the veneers and switches the path between the cutting chips and the product, and an adhesive application mechanism that applies adhesive to the cut surface of the rear end of the veneer. When joining veneers in the fiber direction using a scarf cutting and joining machine, if the cutting waste is not properly removed, it will have a serious negative effect on the straightness of the next cut surface. As for the cutting waste at the rear end, the tip of the following veneer is pushed out into the waste passage between the fixed blade and the damper, and since the tip of a normal veneer is non-linear, However, it is extremely unsuitable for pushing out all the cutting debris that forms into chips during cutting into a separate debris passage, and has the disadvantage that removal is extremely unstable.

The present invention is a cutting waste removal method developed to accurately remove the cutting waste in the scarf cutting of the veneer and the splicing machine, and specifically, the present invention is a method for removing cutting waste at least in a direction orthogonal to the conveying direction of the veneer. The tip is provided with a claw-like body having a width extending over the entire width of the movable blade. A debris removal member that operates irregularly is placed under the damper so that the shaped body moves along the fixed blade toward the carry-out side, and when the rear end is cut, the claw-like body moves along the fixed blade toward the carry-in side. In preparation for this, by the operation of the waste removal member, the tip cut waste is individually removed to a waste passage between the fixed blade and the damper, and the rear end cut waste is removed to an opening formed on the carry-in side of the fixed blade. Take.

According to the cutting waste removal method configured in this manner, the claw-like body has a width that spans at least the entire width of the veneer in a direction perpendicular to the conveying direction of the veneer, and is suitable for engaging with cutting waste that becomes chips as the veneer is cut. Since the tip is equipped with a scrap removal member that operates erratically to remove the tip cut waste and the rear cut waste separately to the most recent removal position, the removal becomes unstable as in the past. This is extremely effective because there is no risk and as a result, good bonding can always be achieved.

Hereinafter, the present invention will be described in more detail with reference to an example of implementation illustrated in the drawings.

FIG. 1 is a schematic side view of a veneer scarf cutting and joining machine used in carrying out the present invention.

2 in the figure is a movable blade that is operated diagonally as shown by the dashed line based on the operation of an operating mechanism 3 consisting of a cam mechanism, a link mechanism, etc.
A feed roll (not shown) that is driven intermittently via an intermittent drive mechanism consisting of a brake, etc., enters from the upper side of the carry-in side to the lower side of the discharge side of the veneer 1, which is being intermittently conveyed in the same direction as the fiber direction. Cut board 1 diagonally (scarf).

5 is a veneer detection mechanism that has a detection roll 5a, a swing arm 5b, a limit switch 5c, etc., and is installed opposite to the reference roll 4, and a veneer 1 between the reference roll 4 and the detection roll 5a. As the rocking arm 5b approaches and passes, a detection signal is sent to the operating mechanism 3, intermittent drive mechanism, etc. from the limit switch 5c, which operates ON and OFF each time the swinging arm 5b swings.As is clear from the figure, the detection position Since there is some distance between the cut position and the cut position, a delay circuit such as a timer is inserted in the control path that transmits the detection signal.
Each time the leading and trailing ends of the veneer 1 reach the cutting position, the feed roll is stopped via the intermittent drive mechanism, the conveyance of the veneer 1 is temporarily stopped, and the feed roll is stopped via the actuating mechanism 3. It is necessary to control the operation of the movable blade 2 and the like. Note that it is also possible to apply other single-plate detection mechanisms using phototubes or the like.

Reference numeral 6 denotes a fixed blade disposed opposite to the movable blade 2, which supports the veneer 1 from below and receives the cutting force of the movable blade 2. If necessary, a blade edge protection member 6a made of urethane rubber or the like is provided at a position corresponding to the blade edge of the movable blade 2 as shown in the figure.

7 is based on the operation of the operating mechanism 3, and for each cutting operation of the movable blade 2, there is a rear end standby position (indicated by a dotted line) where the tip faces the unloading side of the fixed blade 6, and an upper end standby position (indicated by a solid line). (positions shown).
A damper pivotally supported around a support shaft 7a,
Switch the path between cutting waste and products.

Reference numeral 8 denotes a debris removal member provided below the damper 7 and equipped with a claw-like member 9 at its tip having a width spanning at least the entire width of the veneer 1 in the direction orthogonal to the conveying direction, and the operating mechanism 3 In connection with the cutting operation of the movable blade 2, the claw-like body is 9 is veneer 1
As the blade advances to the cutting mark, the claw-like body 9 moves toward the delivery side along the fixed blade 6 during the tip cutting operation, and the claw-like body 9 moves along the fixed blade 6 when cutting the rear end. It is operated irregularly so that it moves to the side, and the cutting chips at the tip are moved between the fixed blade 6 and the damper 7.
The cutting waste at the rear end is individually discharged into the waste passage between the blades and the opening 10 formed on the carry-in side of the fixed blade 6.

Reference numeral 11 denotes a pressure bonding bar that is raised and lowered diagonally via the operating mechanism 3 or another lifting mechanism (not shown), and presses the joint portion of the veneer 1 for a predetermined period of time.

Reference numeral 12 denotes an adhesive application mechanism having a pair of application rolls 12a, 12b, a doctor knife 12c, a container 12d, etc., and a fulcrum (not shown) located above the container 12d via a swinging member (not shown).
An adhesive such as a hot melt adhesive is applied to the cut surface 1a of the rear end of the veneer 1.

The present invention is carried out using, for example, the scarf cutting and splicing machine configured as described above.Next, its operating mode will be explained in detail in order with reference to the operating mode explanatory diagrams illustrated in FIGS. 2 to 4. Describe.

That is, the movable blade 2, the damper 7, the waste removal member 8,
In the starting state in which the crimp bar 11, adhesive application mechanism 12, etc. are at each standby position shown by solid lines in FIG.
The veneer detection mechanism 5 detects the entry of the veneer 1 and issues a detection signal, and when the tip of the veneer 1 reaches the cutting position, the feed roll is stopped via the intermittent drive mechanism, and the veneer 1 is stopped. When the conveyance of the veneer 1 is temporarily stopped and the movable blade 2 is actuated obliquely as shown by the dashed line via the operating mechanism 3, the tip of the veneer 1 is cut diagonally (scarf).

Then, on the one hand, the adhesive is applied to the rear end cut surface 1a of the preceding veneer 1 by the swinging of the adhesive application mechanism 12, and on the other hand, the movable blade 2 returns to the standby position shown by the solid line. In place of this, the waste removal member 8
When the claw-like body 9 advances from the tip standby position shown by the solid line to the cut mark of the veneer 1 and further moves to the delivery side (due to the tip cutting operation) along the fixed blade 6, as shown in FIG. The tip cutting waste S′ is fixed blade 6 and damper 7
When the waste removal member 8 retreats to the rear end standby position and the damper 7 swings to the rear end standby position,
The cut surfaces of each veneer 1 are brought into close contact, and the crimping bar 11
descends and presses the joint.

When a predetermined period of time passes and the crimp bar 11 rises, the conveyance of the veneer 1 by the feed roll is resumed, but eventually the passage of the veneer 1 is detected by the veneer detection mechanism 5.
detects the veneer and issues a detection signal, and when the rear end of the veneer 1 reaches the cutting position, the feed roll is stopped via the intermittent drive mechanism, the conveyance of the veneer 1 is temporarily stopped, and the operating mechanism When the movable blade 2 is actuated via the movable blade 3, the rear end of the veneer 1 is cut diagonally as shown in FIG. When the claw-like body 9 of 8 advances to the cutting mark of the veneer 1 and further moves along the fixed blade 6 to the carry-in side (due to the rear end cutting operation) as shown in FIG. 4, the rear end cut chips S'' is pushed out into the opening 10 formed on the carry-in side of the fixed blade 6 and dropped to be removed.

Thereafter, when the waste removal member 8 returns to the tip standby position shown by the solid line in FIG. 1, each member is restored to its initial starting state.

Thereafter, by repeating the same operation, it is possible to sequentially join the veneers in the fiber direction. Since the engagement between the claw-like body 9 and each of the cutting chips S' and S'' is extremely accurate,
Even if each of the cutting chips S', S'' becomes chips during cutting, the drawing and extrusion will not become defective, and the movement stroke of the claw-like body 9 on the fixed blade 6 will be adjusted to the cutting position. Since it is sufficient that the distance to the nearest waste passageway or opening remains constant at all times, stable drawing and extrusion can be performed regardless of the length of each cutting waste S', S''.

Therefore, according to the cutting debris removal method using the debris removing member 8 having such a claw-like body 9 at the tip, there is a risk that the removal of each cutting debris S', S'' may become unstable as in the conventional method. As a result, good bonding can always be achieved, which is extremely effective.

[Brief explanation of drawings]

The drawings are for explaining the present invention, and FIG. 1 is a schematic side view of a veneer scarf cutting and splicing machine used in carrying out the present invention, and FIGS. 2 to 4 are similar to FIG. 1. FIG. 2 is an explanatory diagram of the operating state of the veneer scarf cutting and joining machine shown as an example. 1... Single plate, 2... Movable blade, 3... Operating mechanism,
4... Reference roll, 5... Single plate detection mechanism, 6...
Fixed blade, 7... Damper, 8... Debris removal member, 9
...Claw-shaped body, 10 ... Opening, 11 ... Pressure bar, 12 ... Adhesive application mechanism.

Claims (1)

[Claims] 1 A movable blade that enters from the upper side of the carry-in side to the lower side of the carry-out side of the veneer veneer that is intermittently conveyed in the same direction as the fiber direction and cuts the veneer diagonally, and a movable blade that supports the veneer veneer from the bottom surface. A fixed blade that receives the cutting force of the blade, and a movable blade that is pivoted so as to swing between a rear end standby position facing the delivery side of the fixed blade and a tip standby position above the fixed blade each time the movable blade performs a cutting operation. A veneer veneer scarf cutting and joining machine whose main elements are a damper that switches the path between cutting waste and the product, and an adhesive application mechanism that applies adhesive to the cut surface of the rear end of the veneer veneer. , the tip is provided with a claw-like body having a width covering at least the entire width of the veneer veneer in the conveying direction and the direct light direction, and in connection with the cutting operation of the movable blade, the claw-like body cuts the veneer veneer. As the blade advances toward the trail, the claw-like body moves along the fixed blade toward the carry-out side during the tip cutting operation, and the claw-like body moves along the fixed blade toward the carry-in side during the rear end cutting operation. A debris removal member that operates irregularly is provided below the damper,
By the operation of the waste removal member, the cutting waste at the tip is individually removed to a waste passage between the fixed blade and the damper, and the cutting waste at the rear end is removed to an opening formed on the carry-in side of the fixed blade. Scarf cutting of veneer veneer and removal of cutting waste in a splicing machine.