JP2854243B2 - Pre-cut planer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pre-cut planer used when pre-cutting a wooden material for the purpose of producing a structural member such as a horizontal member or a column member for a wooden building.

[0002]

2. Description of the Related Art Conventionally, a processed material obtained by subjecting a material having a rectangular cross section cut at a sawmill using a band saw to various joint processing and connection processing is often used as a structural material for a wooden building. Was.

[0003]

The raw material cut at the sawmill not only has a large dimensional variation, but also exhibits warping, bending, twisting, etc., due to drying after the cutting process. The torsion causes poor precision in joint processing and joint processing and poor precision in building structures.

[0004] In order to improve the accuracy of the material, it is necessary to perform four-sided cutting of the material. In the case of processing, it is difficult for these woodworking machines to make smooth feeding of materials that exhibit warpage, bending, twisting, etc. difficult or difficult to process. However, there is a problem that the machining allowance is excessively large, the finished cross-sectional dimension is too small, and the uncut portion is generated, which requires rework. For example, FIG.
In the conventional right-angled two-sided planer shown in (B), when the long side of the rectangular cross section of the material is machined vertically, the entire lower surface of the material 74 contacts the table 71, and the side surface of the material contacts the ruler 72, Since the raw material 74 is inclined and transported by the feed roller 73 for cutting while the bending of the raw material is promoted, the finished cross-sectional dimension of the processed material 75 becomes too small and the yield is greatly reduced. .

[0005] Further, in the above-mentioned woodworking machine, the cutting of the raw material is often performed with the long side of the rectangular cross section of the raw material being sideways. The center of the direction is the standard of processing, and since the long side of the rectangular cross section of the material is made vertical from joint processing and joint processing so that many materials can be stocked, existing When a woodworking machine is connected to an automatic precut line, it is necessary to send the material to the automatic precut line with the long side of the rectangular cross section changed from horizontal to vertical.

SUMMARY OF THE INVENTION It is an object of the present invention to enable a material to be transferred in an appropriate feeding mode to enable appropriate cutting even if the material has a warp, a bend, a twist, or the like.

[0007]

A pre-cutter according to claim 1 is provided.
The top planing machine is used to cut the upper surface of the material.
And a lower surface cutting unit for cutting the lower surface of the material,
The upper cutting unit is interposed between the two cutting units.
Up and down with respect to the lower surface cutting unit,
A screw mechanism that can adjust the distance between
Both cutting units can be moved up and down as one unit via the same mechanism
And both cutting units are
That an upward thrust can be applied to the
Features.

[0008]

[Function] According to the pre-cut planer, the lower surface is cut.
The distance between the unit and the top cutting unit is both cutting units
Is adjusted by the screw mechanism that connects
Linda applies upward thrust to both cutting units
Is provided, so that a material having a warp in the longitudinal direction
Cutting along the sled, or cutting along the sled.
And improve the finished shape of the processed material
Cutting and cutting to improve the yield of processed materials
It can be done selectively.

[0009]

[0010]

[0011]

[0012]

[0013]

[0014]

[0015]

Embodiment 1 Next, an embodiment of the present invention will be described with reference to FIGS. The precut planer for preparing a processed material for a structural material by precutting a raw material of wood having a rectangular cross section has a feeding conveyor 1 into which the raw material is input and a rectangular cross section of the raw material W in a state in which the long side is long. Planer board body 10 for cutting the upper and lower surfaces and both left and right sides of material W
And a take-out conveyer 8 for taking out the cut work material.

In the loading conveyor 1, a lower frame 2 is mounted on a horizontally long lower frame 2 installed at a fixed position by a lifting cylinder 4 attached to the lower frame 2 and a lifting mechanism 3 having a link. A plurality of upper frames 5 connected to the frame 2 and arranged in the material feeding direction are installed so as to be able to move up and down.

When the piston rod 4a of the lifting cylinder 4 moves forward, the upper frames 5 move up at the same time, and when the piston rod 4a moves backward, the upper frames 5 move down at the same time.

A plurality of loading rollers 6 rotatably supported by the upper frames 5 and arranged in the material feeding direction are laid on each upper frame 5 in parallel. Each loading row
The rollers 6 are simultaneously driven to rotate by a roller driving motor 7 and driven by the elevating mechanism 3 so that the upper surface of each loading roller 6 is displaced above and below the upper surface of each upper frame 5. Is controlled by the lifting mechanism 3.

The take-out conveyor 8 is provided with a plurality of take-out rollers 81 arranged in the material feeding direction and simultaneously driven to rotate by a roller drive motor 80.

In the planer board body 10, the base 11 installed at the lower end thereof is connected to the lower frame 2 of the input conveyor 1 and the frame of the take-out conveyor 8, respectively.
On this base 11, three columns 12 arranged in the material feeding direction are erected.

On the inner surface of each column 12, a lower unit frame 15a installed above the base 11 and a lower unit frame 15a installed above the lower unit 15. Guide rails that support the unit frames 30a so that they can move in the vertical direction.
Are mounted vertically.

Lower unit frame of lower surface cutting unit 15
A lower planer blade 22 that rotates around a horizontal rotation axis orthogonal to the material feeding direction and cuts the lower surface of the material W;
A lower plane shaft drive mode for rotating the lower plane blade 22
23 is attached.

At the upper end of the lower unit frame 15a, a lower ruler 24 which is in contact with the lower end of one side surface of the material W and guides the material W in the material feeding direction is horizontally mounted. A ruler surface 24a parallel to the direction is formed.

The lower unit frame 15a has a table elevating motor 17 connected to the unit frame 15a.
The screw rod 16a, which is rotationally driven by the
A lifting mechanism 16 having a nut 16b into which the nut 6a is screwed and a link 16c coupled to the nut 16b is mounted.

Lower unit frame of lower surface cutting unit 15
A table roller unit 19 arranged in the material feeding direction is attached to a table 18 which is connected to a system 15a by a link and driven by an elevating mechanism 16 to move up and down.

Each table roller unit 19 is arranged in the material feeding direction and is pressed against the lower surface of the material W while rotating to push the lower end of the material W in the material feeding direction. And a roller drive motor 21 for rotating each set of table rollers 20.

The table 18 and the table roller 20 are vertically moved and adjusted by the elevating mechanism 16, and the height of the upper surface of each loading roller 6 of the loading conveyor 1 is lower than the lower plane blade 2.
The height is adjusted so as to be equal to the height of the upper surface of the two sets of table rollers 20 on the right side of FIG. The difference between the height of the upper end surface of the upper planer blade 22 and the height of the upper surface of the table roller 20 is a shaving allowance H3 of the lower surface of the material W cut by the upper planer blade 22.
Becomes

As shown in FIG. 7, each of the table rollers 20 has a center axis a1 perpendicular to a ruler surface 24a of the lower ruler 24, and a perpendicular line b1 to the material feeding direction (P direction in the drawing) by an angle A. They are installed in parallel with the slanted oblique line c1.

When each table roller 20 rotates and presses against the lower surface of the material W and pushes the material W, a force for pressing the material W against the lower ruler 24 is applied to the material W,
The material W has a table roller 20 near its lower end on one side.
Thus, the sheet is pushed in the material feeding direction while being pressed against the ruler surface 24a.

Upper unit frame of upper surface cutting unit 30
The upper planer blade 39 that rotates around a rotation axis parallel to the rotation axis of the lower planer blade 22 to cut the upper surface of the material W, and an upper planer shaft that drives the upper planer blade 39 to rotate. A motor 40 is mounted.

An upper ruler 41 is provided at the lower end of the upper unit frame 30a, directly above the lower ruler 24 and in parallel with the lower ruler 24. The upper ruler 41 contacts one upper surface of the material W and guides the material W in the material feeding direction. The upper ruler 41 is formed with a ruler surface 41a parallel to the feeding direction and arranged in the same plane as the ruler surface 24a of the lower ruler 24.

An upper end of a pair of screw rods 31 supported by the upper unit frame 30a and suspended from the upper end thereof is movably connected to the upper unit frame 30a. A portion near the lower end of 31 is screwed into a pair of left and right nuts 32 fixed to the lower unit frame 15a of the lower surface cutting unit 15, and a bevel gear 33 is fixed to the upper end of both threaded rods 31. The two cutting units 15 and 30 are connected by a double screw rod 31 and a double nut 32 so as to be able to move up and down jointly.

An upper surface cutting unit elevating motor 34 is attached to one end of the upper unit frame 30a. The forward / reverse rotation of the upper surface cutting unit elevating motor 34 is controlled by a pair of bevel gears 33 so that both screw rods are rotated. 31 transmitted to both screw rods 31
Are driven to rotate in forward and reverse directions.

Both threaded rods 31 are moved up and down by the upper surface cutting unit.
When the upper cutting unit 15 is driven to rotate in the forward and reverse directions by the table 34, the upper surface cutting unit 15 moves up and down together with the two screw rods 31, and the space between the two cutting units 15, 30 and the space between the upper and lower plane blades 39, 22 are enlarged and reduced.

The finished thickness H2 of the work material is set based on the thickness H1 of the material W when the long side of the rectangular cross section of the material W is made vertical and the magnitude of the strain of the material W. Approximately の of the difference between the height H1 and the finished thickness H2 becomes the lower surface shaving allowance H3 by the lower planer blade 22 and the upper surface shaving allowance H4 by the upper planer blade 39, respectively.

In setting the finished thickness H2, the upper surface cutting unit elevating and lowering module is set so that the distance between the upper end surface of the lower planer blade 22 and the lower end surface of the upper planer blade 39 becomes the finished thickness H2.
The cutter 34 is driven to adjust the vertical position of the upper surface cutting unit 30.

Four feed roller units 35 attached to the upper unit frame 30a and arranged in the material feeding direction.
Is an upper unit frame 1 connected to the upper unit frame 30a.
A pair of roller pressurizing cylinders 38 are coupled to lower ends of piston rods of both roller pressurizing cylinders 38, respectively.
A pair of feed rollers 36 that press against the upper surface of the material W while rotating and push the upper end of the material W in the material feeding direction, and a roller drive motor that rotationally drives the two feed rollers 36. 37.

Each pressurizing cylinder 38 is connected in parallel to a pneumatic pressure source 79 through a second pressure reducing valve V2, and each roller pressurizing cylinder 38 pushes down the material W through the feed roller 36. Can be adjusted by the second pressure reducing valve V2.

Each feed roller 36 on the right side of the upper planer blade 39 in the figure is installed with its lower surface being slightly lower than the lower surface of the upper planer blade 39, and is pushed up against the upper surface of the material W when the material is transferred. Can be

As shown in FIG. 8, each feed roller 36 has a center axis a2 perpendicular to the ruler surface 41a of the upper ruler 41, and a perpendicular line b2 inclined by an angle A toward the material feeding direction (P direction). c
2 are installed in parallel with each other.

When each feed roller 36 rotates and presses against the upper surface of the material W to push the lower end of the material W, a force for pressing the material W against the upper ruler 41 is applied to the material W,
The material W is pushed in the material feeding direction with the upper end of one side face pressed against the ruler surface 41a by the feed roller 36.

The upper surface of the base 11 is operated by air pressure, and the lower surface cutting unit 15 and the upper surface cutting unit 3 are operated at the time of operation.
0 to both cutting units 1 by applying an auxiliary thrust upward
A pair of balance cylinders 14 for lifting 5, 30 are fixed upward, and the unit base 15a of the lower surface cutting unit 15 is installed on the piston rods of both balance cylinders 14 so as to be displaceable upward.

The two balance cylinders 14 are connected in parallel to a first pressure reducing valve V1 connected to a pneumatic pressure source 79, and the two cylinders 14 adjust the auxiliary thrust for lifting the cutting units 15, 30 by the first pressure reducing valve V1. can do.

During the cutting of the material W in which the warp curved in the upwardly convex arc shape is formed in the longitudinal direction, the vicinity of the center of the material W is gripped between the table roller 20 and the feed roller 36. In a state in which both ends of the material W are supported by the input conveyor 1 and the take-out conveyor 8, the magnitude of the bending repulsion force when pressing the sled of the material W and the cutting units 15 and 30 applied to the material W Although the warp form of the material changes depending on the difference from the total weight, when the two balance cylinders 14 are actuated to apply an upward thrust to the two cutting units 15 and 30, the two cutting units 15 and 30 displace the material W. Since the pushing force is reduced and the change in the warp form of the material W is reduced, the auxiliary thrust applied by the balance cylinders 14 to the cutting units 15 and 30 and the feed rollers 36 are controlled by the feed rollers 36. Can be a pressing the thrust first, adjusted by the second pressure reducing valve V1, V2 sets the warpage form during cutting the material into a desired form.

A side processing unit frame 50 is erected at the end of the base 11 on the side of the take-out conveyor 8, and the side processing unit frame 50 is provided along a material width direction orthogonal to the material feeding direction. Two pairs of upper and lower guide rails installed horizontally
Is fixed.

A right side cutting unit 60 having a right unit frame 60a guided by a pair of upper and lower guide rails 51 near one end of the side processing frame 50 is capable of moving horizontally in the width direction of the material. Supported, side processing frame 5
A left side cutting unit 64 provided with a left unit frame 64a guided by a pair of upper and lower guide rails 51 is coupled to the vicinity of the other end of 0 so as to be horizontally movable in the material width direction.

A right unit moving motor 54 is attached to one end of the side processing frame 50, and a right unit moving motor 54 is provided.
Right unit moving screw rod 52 connected to the output shaft of
Is screwed into a right unit moving nut 53 fixed to the right unit frame 60a of the right side cutting unit 60.

The left unit moving motor 57 is attached to the right unit frame 60a of the right side cutting unit 60, and the left unit moving screw bar 55 connected to the output shaft of the left unit moving motor 57 is connected to the left side cutting unit. Left unit moving nut 56 fixed to left unit frame 64a
Is screwed into.

The right side cutting unit 60 is horizontally moved in the width direction of the material together with the left side cutting unit 64 by the forward / reverse rotation of the right unit moving motor 54, and the left side cutting unit 64 is driven by the forward / reverse rotation of the left unit moving motor 57. Move horizontally in the width direction.

Right unit frame of right side cutting unit 60
A right planer blade 61 that rotates around a vertical rotation axis and cuts the right surface of the material, and a right planer blade 6
1 and a right planer shaft drive motor 62 for rotatingly driving the motor 1.

The right unit frame 60a is fixed with a right side cutting unit ruler 63 which is in contact with one side surface of the material W and regulates the direction of transfer of the work material.
3 is formed with a right ruler surface 63a that is parallel to the material feeding direction and substantially aligned with the left end surface of the right planer blade 61.
Reference numeral 3a is a reference plane in the width direction of the processed material after the right side cutting.

The left unit frame of the left side cutting unit 64
A left planer blade 65 that rotates about a vertical axis of rotation and cuts the left surface of the material W, and a left planer shaft drive motor 66 that rotationally drives the left planer blade 65 are attached to the drum 64a. ing.

To the left unit frame 64a is fixed a left side cutting unit ruler 67 for preventing a lateral displacement of the processed material after the left side cutting in the width direction. The left side cutting unit ruler 67 is parallel to the material feeding direction and the left plane. A left ruler surface 67a substantially aligned with the right end surface of the blade is formed.

The left end face of the right planer blade 61 and the two rulers 24, 4
The distance between the first ruler surfaces 24a and 41a is a shaving allowance B3 on the right side of the material W, and a cutting allowance B3 on the right side of the material W is set by adjusting the movement of the right side cutting unit 60 in the material width direction.

The distance between the right and left planer blades 61 and 65 is the finished width B2 of the work material, and the left side cutting unit 6
The finishing width B2 and the cutting margin B4 on the left side of the material W are set by the movement adjustment in the material width direction of No. 4.

The table roller unit 19d fixed to the side processing frame 50 includes a plurality of table rollers 20d arranged in the material feeding direction and in contact with the lower surface of the processed material.
The height of the upper surface of each table roller 20d coincides with the height of the upper surface of the discharge roller 81 of the take-out conveyor 8.

When the material W is cut, the material W is guided by the two rulers 24 and 41 and moves in the material feeding direction, while the lower planer blade 22, the upper planer blade 39, and the right planer blade 6
1, the lower surface, the upper surface, the right side surface, and the left side surface are cut in this order by the left planer blade 65, so that the material thickness H1 becomes the finished thickness H2 and the material width B1 becomes the finished width B2.

When the material W having a large amount of warpage is formed in the longitudinal direction and the amount of warpage is large, the amount of warpage of the material is defined as C1.
The repulsive force when pressing the sled of the material is R1, the upward thrust by both balance cylinders 14 is F1, and 8
The thrust downward by the roller pressurizing cylinders 38 is F2
And the total weight of the weight of the lower surface cutting unit 15 and the weight of the upper surface cutting unit 30 is M1, and the weight M1
If M2 is the apparent weight obtained by subtracting thrust F1 from
When correcting the warp of the material W to finish the work material straight, the set pressure of the first pressure reducing valve V1 is set to 0, the thrust F1 is set to 0, the weight M1 is made equal to the apparent weight M2, and the second pressure reduction is performed. The set pressure of the valve V2 is adjusted to make the thrust F2 smaller than the apparent weight M2.

In this case, the raw material W is transferred and cut in a state where the warp is not corrected, and the cutting allowance of the upper and lower surfaces of the raw material W gradually increases or decreases with the progress of the raw material W in accordance with the bent form of the raw material W. As the thrust F2 is smaller than the repulsive force R1 of the material W, the warp is corrected straight.

When the material W is cut along the sled to improve the yield of the work material, the second pressure reducing valve V2
Is adjusted such that a sufficient thrust F2 is secured for the material feeding, and the set pressure of the first pressure reducing valve V1 is adjusted to adjust the thrust F1.
So that the apparent weight M2 is smaller than the thrust F2.

In this case, if the material thickness H1 is small and the repulsive force R1 is smaller than the thrust F2, the material W is cut in an elastically deformed state, elastically restored after the processing, and the processed material remains warped. State.

The material thickness H1 is large and the repulsion force R1
Is larger than the thrust F2, the upper and lower surface cutting units 15, 3
0 and the material W are lifted by the thrust F1, and the material W is cut along the sled.

In the above-described embodiment, the planer board is formed by lowering the four surfaces of the material W with the upper and lower plane blades 22 and 39 and the left and right plane blades 6.
Although the four-sided planer machine for cutting is described with reference to FIGS.
Alternatively, the lower surface and the right side surface of the raw material W may be used as a two-sided planer board which is cut by the lower planer blade 22 and the right planer blade 61.

Next, the operation and effect of the embodiment having the above-described configuration will be described. In this example, the planer board body 10 includes:
A pair of upper and lower rulers 41, 24 formed with ruler surfaces 41a, 24a respectively contacting a part of one side surface of the material W having a rectangular cross section in the same plane parallel to the material feeding direction;
1 is installed in a state where a perpendicular line b1 perpendicular to the ruler surface 24a is parallel to an oblique line c1 inclined toward the material feeding direction, and presses against the lower surface of the material W while rotating to push the material W in the material feeding direction. The plurality of table rollers 20 and the center axis a2
A plurality of feeds are installed in such a manner that a perpendicular line b2 perpendicular to 1a is parallel to an oblique line c2 inclined to the material feeding direction, and is pressed against the upper surface of the material W while rotating to push the material W in the material feeding direction. A lower surface cutting unit 15 having a lower plane blade 22 for cutting the lower surface of the material W and an upper surface cutting unit 30 having an upper plane blade 39 for cutting the upper surface of the material are provided on the planer board body 10. And a screw mechanism for connecting the two cutting units 15 and 30 by adjusting the distance between the two cutting units 15 and 30 and a thrust upward when the two cutting units 15 and 30 are operated. And a balance cylinder 14 for adding.

For this reason, the central axes a1 of the respective table rollers 20 and the central axes a2 of the respective feed rollers 36 are oblique lines c1 and b2, which are perpendicular to the material feeding direction, and which are inclined to the material feeding direction.
1 and c2 are parallel to each other, so that the material can be accurately transferred in an appropriate feeding mode and cut in a state where the upper and lower portions of one side of the material W are pressed against the ruler surfaces 24a and 41a, respectively. Even if the material W has a warp formed in the thickness direction, the material W can be stably transferred while being pressed against both the rulers 24 and 41 in a posture where the cutting allowance is minimized, and the cutting process can be performed. The yield in the process can be improved.

Since the material W is transferred in a state where the two rulers 24 and 41 are in contact with one side surface of the material W at two upper and lower positions, the material W is transferred and cut with the long side of the rectangular section being vertical. Processing can be performed, and this cutting line can be incorporated into an automatic pre-cut line for structural materials of a wooden building.

When the material is sent, both the rulers 24 and 41
Respectively, and the lower end and the upper end of the material W are positively pushed by the table roller 20 and the feed roller 36, so that the material of each form is always kept in two places at the top and bottom. The material can be guided in the material feeding direction and transferred, and even if the material has a sled whose cross-sectional shape is convex toward the ruler, the material can be stably transferred in an appropriate posture.

Further, since the cutting cylinders 15, 30 can apply an upward thrust to the cutting units 15, 30 by the balance cylinder 14 when necessary while maintaining a predetermined interval, the warpage in the longitudinal direction can be achieved. It is possible to cut the material on which is formed with no warp or cut along the sled, and to improve the finished shape of the work material and improve the yield of the work material Cutting can be selectively performed.

[Brief description of the drawings]

FIG. 1, showing an embodiment of the present invention, is a front view of a main part of a planing board.

FIG. 2 is a front view of a charging conveyor and a discharging conveyor.

FIG. 3 is a front view of the plane board main body.

FIG. 4 is a side view of the plane board main body.

FIG. 5 is a plan view of the lower surface cutting unit.

FIG. 6 is a plan view of the upper surface cutting unit.

FIG. 7 is a plan view of a main portion for exaggeratingly explaining an installation state of a table roller.

FIG. 8 is a plan view of a main portion for exaggeratingly explaining an installation state of a feed roller.

FIG. 9 is a side view of the left and right side cutting units.

FIG. 10 is a side view of a main part for explaining a material feeding state.

FIG. 11 is a pneumatic circuit diagram of a balance cylinder and a roller pressurizing roller.

FIG. 12 is a side view of a main part for explaining a material feeding state using a conventional right-angled two-plane planer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Planner board body 14 Balance cylinder 15 Bottom cutting unit 20 Table roller 22 Lower plane blade 24 Lower ruler 30 Upper plane cutting unit 31 Screw bar 32 Nut 36 Feed roller 39 Upper plane blade 41 Upper ruler

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B27C 1/14 B23Q 7/00 B27C 1/02 B27C 1/12

Claims (1)

(57) [Claims] An upper surface cutting unit for cutting an upper surface of a material.
And a lower surface cutting unit for cutting the lower surface of the material,
The upper surface cutting unit is interposed between the two cutting units.
With respect to the lower surface cutting unit,
A screw mechanism capable of adjusting the interval between the units;
The two cutting units can be moved up and down integrally via a mechanism
Yes, and both cutting units by a balance cylinder
A planing board for pre-cut, characterized in that a thrust upward can be applied to the machine.