JP4243916B2 - Finger joint cutting method and apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cutting method and apparatus for processing a finger joint on a joining end face of a plate material in order to join a short plate material into a long material.
[0002]
[Prior art]
FIGS. 9A and 9B show finger joints for joining the plate materials. The finger joints 2 are processed on the joining end surfaces of the short plate materials 1 to be joined to each other, and an adhesive is applied to both the finger joints 2. In this state, the short plates 1 are joined to each other and bonded to each other to form a long material.
[0003]
2. Description of the Related Art Conventionally, as a cutting device for processing the above-described finger joint 2 at the end of a plate material 1, a biaxial cutting device provided with a first cutting cutter and a second cutting cutter arranged side by side in the feeding direction of the plate material 1 Is used.
[0004]
As shown in FIGS. 8 (A) and 8 (B), this two-axis type cutting device is a plate material 1 that is sent by the feed material chain 3 during the feed of the feed material chain 3 that supports and feeds the plate material 1. The first cutting cutter 4 and the second cutting cutter 5 that cut the end portion of the plate 1 are arranged side by side so as to perform cutting in the same rotational direction. The cutter 4 performs preliminary cutting shallower than the finished dimension by the interval g, and then performs finish cutting with the second cutting cutter 5.
[0005]
[Problems to be solved by the invention]
By the way, when both the first cutting cutter 4 and the second cutting cutter 5 perform cutting in the same rotational direction, when cutting by up-cutting, there is a crease or chip at the end of the cutter of the plate 1. When it is generated and cut by down-cutting, a crease or chipping occurs at the end of the cutter on the plate 1 and causes defective products.
[0006]
In addition, when the above-mentioned crust and chipping occur, it is necessary to cut until the crust and chip do not exist, and the finishing allowance after joining is increased accordingly, which contributes to poor yield. Yes.
[0007]
SUMMARY OF THE INVENTION An object of the present invention is to provide a finger joint cutting method and apparatus capable of improving yield without producing defective products during processing of the finger joint.
[0008]
[Means for Solving the Problems]
In order to solve the problems as described above, the invention of the method uses a finger joint cutting device provided with a biaxial finger joint cutting cutter, and first, at the edge of the plate material, the first cutting cutter feeds the feed direction. In contrast, the cutting is shallower than the finished size by up-cutting, and the cutting edge of the first cutting cutter does not hit the plate material before the cutting edge of the first cutting cutter is completely removed in the feeding direction. Next, a configuration is adopted in which the second cutting cutter cuts the sheet material in the down cut with respect to the feeding direction and finishes at the end of the plate material.
[0009]
The first cutting cutter automatically cuts and retracts the plate material by causing the plate material to move forward and backward in synchronization with the feed speed of the plate material feeding chain. be able to.
[0010]
In addition, the invention of the apparatus feeds the first cutting cutter and the second cutting cutter that cut the end of the plate material fed by the feed chain in the middle of feeding the feed material chain. Provided side by side in the material direction, the first cutting cutter performs cutting shallower than the finished size by up-cutting in the feed direction at the end of the plate material, and the cutting edge is completely removed from the plate direction in the feed direction. Arranged so that it can move forward and backward with respect to the plate material so as to move backward to a position where it does not hit the plate material, and the second cutting cutter cuts the edge of the plate material with a down cut in the feed direction. In this way, a configuration in which finishing processing is performed is adopted.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below based on the examples shown in FIGS.
[0012]
As shown in FIG. 1 to FIG. 6, the carrier 11 that supports and feeds the plate material 1 is connected to the sprockets 14, 15 provided with endless feed chain 13 on both sides of the frame 12. A ruler that is arranged by winding and guides the upper traveling portion of the feeding material chain 13 along the rail 16 provided on the frame 12 and pushes and moves the plate material 1 between the feeding material chains 13 on both sides. 17 are provided at regular intervals in the traveling direction, and the both-side feeding chain 13 is disposed at intervals that support both ends of the plate material 1, and the upper traveling portion of the frame 12 is driven by rotating the sprocket 15 by the motor 18. The vehicle travels from the receiving end to the take-out end.
[0013]
Biaxial finger joint cutting mechanisms 21 and 22 are respectively installed on one side of the transport body 11 near the receiving end with respect to the feeding direction and on the other side near the take-out end. Are provided with positioning mechanisms 23 and 24 for positioning the end portions of the plate 1 supported by the feed chain 13 at positions closer to the entry side of the plate 1 relative to the finger joint cutting mechanisms 21 and 22, respectively. It has been.
[0014]
The finger joint cutting mechanisms 21 and 22 are each provided with a cleaver cutting cutter 60 at a position on the entry side of the plate 1.
[0015]
In addition, since both the finger joint cutting mechanisms 21 and 22 have the same structure, respectively, the other finger joint cutting mechanism attaches | subjects the same code | symbol to the other finger joint cutting mechanism by demonstrating one finger joint cutting mechanism. It replaces with explanation by doing.
[0016]
As shown in FIGS. 3 to 6, the finger joint cutting mechanism 22 includes a base end cutting cutter 60 that cuts and aligns the end of the plate 1 that is fed by the feed chain 13 to the base member 25 arranged on the side of the transport body 11. The first cutting cutter 26 and the second cutting cutter 27 that process the finger joints to the cut end, the drive motor 28 that rotates both the cutters 26 and 27, and the material feed chain 13 are moved up and down. It has a structure in which a plate material presser 29 that moves and presses and fixes the plate material 1 to the feed material chain 13 is provided.
[0017]
The kerf cutting cutter 60, the first cutting cutter 26, and the second cutting cutter 27 are arranged side by side in the above order from the feeding direction of the feeding chain 13, and the first cutting cutter is positioned first in the feeding direction. The cutter 60 is attached to a rotation shaft of a drive motor 58 that is slidably attached in a direction perpendicular to the feeding direction of the feed chain 13 by a guide tool 59 fixed to the base member 25.
[0018]
The first cutting cutter 26 positioned second in the feed direction is attached to the upper end of a shaft 31 supported by a bearing 30, and the bearing 30 is a vertical fulcrum shaft 33 provided with upper and lower arms 32 on the base member 25. The first cutting cutter 26 is swingable in a plane around the fulcrum shaft 33.
[0019]
In addition, the second cutting cutter 27 located third in the feeding direction is slidable in a direction perpendicular to the feeding direction of the feeding chain 13 by the guide 61 fixed to the base member 25. The first cutting cutter 26 and the second cutting cutter 27 are attached to the upper end of the shaft 35 supported by the bearing 34, and are driven so as to rotate reversely by a single drive motor 28. The finger joint is processed by cutting the end portion of the plate material 1 that is held by the plate material presser 29 and sent.
[0020]
Here, the swing of the first cutting cutter 26 is interlocked with the travel of the feed chain 13 of the transport body 11. As shown in FIG. 2, a motor 18 that drives the feed chain 13 and a central shaft 36 that is arranged at the lower center along the feed direction of the transport body 11 are linked via an intermediate shaft 37 and a gear box 38. The cam 39 is fixed to the central shaft 36, and the rear end of the advancing / retracting shaft 41 horizontally supported by the support cylinder 40 fixed to the base member 25 projects into the bearing 30 of the first cutting cutter 26 as shown in FIG. A cylinder that is pivotally connected to a hinge 42 provided, a roller 43 provided at the tip of the advance / retreat shaft 41 is brought into contact with the cam 39, and the roller 43 is constantly pressed against the cam 39 with a constant pressure against the hinge 42 of the bearing 30. 44 is connected, and the movement of the advance / retreat shaft 41 by the rotation of the cam 39 causes the bearing 30 of the first cutting cutter 26 to swing.
[0021]
By such interlocking, the timing of feeding the plate material 1 by the feeding chain 13 and the swing of the first cutting cutter 26 are matched.
[0022]
7A and 7B show the relationship between the rotation direction of the first cutting cutter 26 and the second cutting cutter 27, the swing angle of the first cutting cutter 26, and the cutting with respect to the plate material 1. The rotation direction is set so that the cutting cutter 27 performs cutting by down-cutting with respect to the feeding direction, and the cutting amount for finishing the end portion of the plate 1 is obtained.
[0023]
On the other hand, the rotation direction of the first cutting cutter 26 is set so as to cut by up-cutting with respect to the feeding direction, and the swing angle α ° is close to the end of the plate 1 when Cutting shallower than the finished dimensions is performed, and the cutting edge of the first cutting cutter 26 is retracted to a position where the cutting edge of the first cutting cutter 26 does not hit the plate material 1 before the cutting edge of the first cutting cutter 26 is pulled out in the feeding direction. Is set to The depth of cut of the first cutting cutter 26 is such that, for example, the finish dimension is such that the distance h from the finish dimension is 0.5 to 1 mm.
[0024]
As shown in FIGS. 3 to 5, the plate material holder 29 has a frame 45 that can be moved up and down along the vertical guide 46 of the base member 25 and a handle 47 attached to the base member 25. The screw shaft 48 and the nut member 49 of the frame 45 are screwed together, and the position of the frame 45 can be adjusted up and down by rotating the handle 47, and the pulleys 50, 51 and 52 are respectively provided above and below the both ends of the frame 45. 53, and a plurality of material pressing pulleys 62 are provided between the pulleys 52, 53, and an endless belt 54 is wound around the outer periphery of the pulleys 50 to 53 and 62, and the material pressing pulley 62 is shown in FIG. As shown in FIG. 5, the plate material 1 supported by the feed chain 13 is moved by the belt 54. By persist in even, when machining a first cutting cutters 26 finger joints second cutting cutters 27, it is desirable to make not to plate 1 from escaping.
[0025]
The positioning mechanisms 23 and 24 are formed by using a positioning ruler 56 disposed on the side of the transport body 11 and an endless belt conveyor, and are disposed between the feed chain 13 of the transport body 11 to feed the material. By supporting the plate 1 sent by the chain 13 on the upper surface, the plate 1 is fed in a direction perpendicular to the feeding direction by the feeding chain 13 and the end is pressed against the positioning ruler 56. The plate member 1 is formed by a member 57 and is pressed by the plate member presser 29 and held by the feed material chain 13 with its end pressed against the positioning ruler 56, and the end of the plate 1 is held by the end cutting cutter 60. After being cut and aligned, it is sent to the first cutting cutter 26 and the second cutting cutter 27.
[0026]
The finger joint cutting device of the present invention has the above-described configuration, and the finger joint cutting method will be described next.
[0027]
The motor 18 of the conveyance body 11 is activated to run the feed chain 13, and both the finger joint cutting mechanisms 21 and 22, the end cutting cutter 60, the first cutting cutter 26, and the second cutting cutter 27 are rotated. In this state, the plate material 1 is supplied onto the transport body 11 from the receiving side end.
[0028]
Both ends of the plate material 1 are supported by a feeding chain 13 and moved by being pushed by a ruler 17 provided between the feeding chain 13. The moving plate material 1 is first transported by the first positioning mechanism 23. One end is pressed against the positioning ruler 56 arranged on the side of the body 11, and the plate 1 is pressed by the plate holder 29 in a position where the end is pressed against the positioning ruler 56. It is held by the chain 13 and enters one finger joint cutting mechanism 21.
[0029]
Next, the plate material 1 that has entered the wood cutting cutter 60 of one finger joint cutting mechanism 21 is finished while cutting the surface of the wood to a certain size, and enters the next first cutting cutter 26.
[0030]
The first cutting cutter 26 oscillates in time with the traveling speed of the feed chain 13, and when the plate material 1 enters the first cutting cutter 26, a solid line in FIG. The end of the plate material 1 that has entered is cut by up-cutting in the feed direction, and the cutting is shallower than the finished dimensions. Before the cutting edge of the cutting cutter 26 comes out of the plate material with respect to the feeding direction, the first cutting cutter 26 moves back to a position where the cutting edge indicated by a two-dot chain line in FIG. .
[0031]
After the plate material 1 passes through the first cutting cutter 26, the plate material 1 enters the second cutting cutter 27, and the second cutting cutter 27 places the end of the entering plate material 1 in the feeding direction. On the other hand, cutting is performed by down-cutting and cutting is performed so that the finished dimensions are obtained, and the end of the plate 1 passes through the second cutting cutter 27 to complete the finger joint 2 as shown in FIG. .
[0032]
In this way, the cutting of the plate material 1 by the first cutting cutter 26 is performed in an upcut manner shallower than the finished size in the feeding direction, and the cutting edge of the first cutting cutter 26 is in the feeding direction. Before the plate material 1 is completely pulled out, the cutting edge is retracted to a position where it does not hit the plate material, and the second cutting cutter 27 performs finish cutting by down-cutting, so that the end face on the cutter removal side is not damaged or chipped. It can be prevented from occurring.
[0033]
The plate material 1 passes through one finger joint cutting mechanism 21, and the second positioning mechanism 24 presses the other end against a positioning ruler 56 disposed on the side of the transport body 11, and the plate material 1 has the other end. With the portion pressed against the positioning ruler 56, the other end passes through the other finger joint cutting mechanism 22 and the other end in the same manner as in the case of the one finger joint cutting mechanism 21 described above. The plate 1 having the finger joint 2 processed at the portion and the finger joint 2 processed at both ends is discharged to the end portion on the take-out side of the transport body 11.
[0034]
【The invention's effect】
As described above, according to the present invention, the cutting of the plate material by the first cutting cutter is finished by up-cutting with respect to the feeding direction, using the finger joint cutting apparatus including the biaxial finger joint cutting cutter. Reducing to a position where the blade edge of the first cutting cutter does not touch the plate material before the blade edge of the first cutting cutter comes out with respect to the feeding direction, and the second cutting cutter is down cut. By performing the cutting, it is possible to prevent the occurrence of crusting or chipping on the end surface on the side where the cutter comes off, thereby eliminating the cause of defective products and improving the yield.
[0035]
In addition, since there is no creaking or chipping on the end surface of the cutter on the removal side, it is not necessary to make a large finishing allowance after joining, and in this respect, the yield can be improved.
[Brief description of the drawings]
FIG. 1 is a front view of a finger joint cutting device. FIG. 2 is a plan view of the finger joint cutting device. FIG. 3 is an enlarged front view of a finger joint cutting mechanism in the cutting device. Fig. 5 is an enlarged plan view showing the plate material pressing portion of the finger joint cutting mechanism in the cutting device. Fig. 6 is a diagram showing the first cutting cutter of the finger joint cutting mechanism in the cutting device. FIG. 7A is a plan view showing the rotational direction of the first cutting cutter and the second cutting cutter, the swing angle of the first cutting cutter, and the cutting relationship with the plate material. FIG. 8B is a front view of the same. FIG. 8 is a plan view showing the arrangement of the first cutting cutter and the second cutting cutter in the conventional cutting apparatus. 9 (A) is a front view of the processed sheet finger joint, (B) is the plan view EXPLANATION OF REFERENCE NUMERALS
DESCRIPTION OF SYMBOLS 1 Board | plate material 2 Finger joint 11 Conveyance body 12 Frame 13 Feed chain 14 Sprocket 15 Sprocket 16 Rail 17 Ruler 18 Motor 21 Finger joint cutting mechanism 22 Finger joint cutting mechanism 23 Positioning mechanism 24 Positioning mechanism 25 Base member 26 First cutting cutter 27 Second cutting cutter 28 Drive motor 29 Plate material holder 30 Bearing 31 Axis 32 Arm 34 Holder 35 Axis 36 Central axis 37 Intermediate axis 38 Gear box 39 Cam 40 Support cylinder 41 Advance / Retreat axis 42 Hinge 43 Roller 44 Cylinder 45 Frame 46 Vertical guide 47 Handle 48 Screw shaft 49 Nut member 50 Pulley 51 Pulley 52 Pulley 53 Pulley 54 Belt 55 Spring 56 Positioning ruler 57 Feeding member

Claims (3)

Using a finger joint cutting device equipped with a biaxial finger joint cutting cutter, first, at the end of the plate material, the first cutting cutter performs an upcut in the feed direction and performs a shallower cut than the finished size. The first cutting cutter is retracted to a position where the cutting edge does not touch the plate material before the cutting edge of the first cutting cutter is completely removed in the feeding direction. 2. A method for cutting a finger joint, wherein the cutting cutter performs cutting by down-cutting in the feed direction. The first cutting cutter causes the plate material to move forward and backward in synchronization with the feed speed of the plate material feed chain, thereby cutting the plate material and retreating from the plate material. The finger joint cutting method according to claim 1. The first cutting cutter and the second cutting cutter for cutting the end portion of the plate material sent by the feed chain are arranged side by side in the feed direction in the middle of feeding the feed material chain to support and feed the plate material, The first cutting cutter performs cutting shallower than the finished size by up-cutting the end of the plate material in the feed direction, and the cutting edge does not hit the plate material before the plate material comes off in the feed direction. The second cutting cutter is arranged so that it can be moved forward and backward with respect to the plate material so as to retreat to the end of the plate material by performing a cut in a down cut with respect to the feeding direction. A finger joint cutting device characterized by being arranged.

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