JP2019001144A - Combination cutter - Google Patents

Abstract

To adjust a height of a tip of a cutter as well as to reduce a weight of the cutter used for a veneer cutting device.SOLUTION: By rotating the third bolt 15 threaded into the second female thread 9D of the first combination cutter P2 integrated with the first cutter 7 and each of the first support member 9 by threading the first bolt 11 into the first female thread 7G through the first hole 9C, a projecting length of the head part 15A side from the first support member 9 is changed, a height L1 is changed to the preferred amount, next the first nut 13 is rotated to abut the first support member 9 and the third bolt 15 is fixed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a combination blade used in a single plate cutting apparatus such as a veneer lace slicer.

A single plate cutting apparatus, for example, a veneer race, has a configuration as shown in Patent Document 1.
That is, as shown in FIG. 11, for one rotation of the log 51 that is supported and rotated by a spindle (not shown), a stand that moves toward the log 51 by a distance equal to the set thickness of the veneer 53. A blade 57 for cutting the log 51 is fixed to 55.
The cutter 57 has a cutting edge 57C in the vicinity of the upper end by a rake face 57A and a flank face 57B.
The fixed cutting tool 57 is set so that the cutting edge 57C is substantially coincident with a virtual horizontal line passing through the rotation center of the log 51.
If the cutting edge 57C is displaced in a direction away from the virtual horizontal line, the thickness of the single plate obtained by cutting becomes thin, and problems such as deterioration in quality occur.

As described above, by continuing to cut the rotating log 51, the vicinity of the cutting edge 57 </ b> C of the cutting tool 57 is worn, and problems such as generation of large irregularities on the surface of the set single plate 53 occur.
Therefore, the cutter 57 is removed from the base 55, and the vicinity of the cutting edge 57C of the cutter 57 is polished by a known polishing apparatus (not shown).
Polishing removes the vicinity of the cutting edge 57C, and the position of the newly formed cutting edge 57C of the cutting tool 57 changes, that is, moves downward in FIG.
Therefore, in order to adjust the position to substantially coincide with the imaginary horizontal line, the first bolt 59 is provided at the bottom of the blade 57 at an appropriate interval in a direction parallel to the blade edge 57C.
In order to screw in each first bolt 59, an internal thread 61 is formed at the bottom of the blade 57 at the interval toward the blade edge 57C.
As shown in FIG. 11, a first bolt 59 into which a first nut 63 is screwed is screwed into each female screw 61.
Hereinafter, the blade 57 into which the first bolt 59 is screwed is referred to as a combined blade P1.

With such a combined blade P1, when the distance between the blade edge 57C of the blade 57 and the bottom 59A of each first bolt 59 (hereinafter referred to as the blade height) is fixed to the base 1 as described above, The blade edge 57C needs to be adjusted so as to be at a position substantially coincident with the virtual horizontal line.
Here, the blade height when the cutting edge 57C is at the substantially coincident position is defined as L1.
A method for setting the blade height to L1 will be described next.

In this case, a jig 64 configured as follows is used.
In FIG. 12, 66 is a base, and 68 is a vertical member fixed perpendicularly to the base 66.
The distance between the surface 66A of the base 66 and the upper surface 68A of the vertical member 68 is L1, as shown.
70 includes a pindle 70A, a measuring element 70B fixed to the lower end of the spindle 70A, and a display unit 70C using a needle (not shown). The measuring element 70B is moved away from the display unit 70C by a spring (not shown). FIG. 12 shows a known dial gauge that always receives a downward pressing force.
Reference numeral 72 denotes a connecting member fixed to the vertical member 68, and a support portion 72 </ b> A is fixed to the upper end of the connecting member 72.
As shown in FIG. 12, the dial gauge 70 is held by a support portion 72A at its lower end.
The dial gauge 70 moves up and down the measuring element 70B and the spindle 70A integrated with the measuring element 70B when the measuring element 70B hits the object to be measured.
The vertical movement is changed to rotational movement by the action of the gear, the needle of the display unit 70C is rotated, and the value when the needle stops is shown on the display unit 70C.

In such a jig 64, first, the measuring element 70B is lowered by the spring force, the measuring element 70B is applied to the upper surface 68A, and the reference value R of the needle of the display unit 70C at this time is confirmed.
Next, the probe 70B is lifted manually, and the distance between the surface 66A of the base 66 and the probe 70B is sufficiently increased.
In this state, the cutting tool 57 in a state in which a plurality of first bolts 59 are appropriately projected downward from the bottom surface 57D, as shown in FIG. 12, the cutting tool 57 is placed on the base 66 with the cutting edge 57C up. On the surface 66A.
Next, the measuring element 70B that has been lifted is released, the measuring element 70B is lowered by the force of the spring and applied to the cutting edge 57C of the blade 57, and the actual value Q1 of the needle of the display unit 70C at this time is confirmed.
When Q1 is larger than R (large in FIG. 12), the blade height is larger than L1.
Therefore, the cutter 57 is removed from the base 66, and the first bolts 59 are rotated by an appropriate number so as to enter the cutter 57 in order to reduce the height of the cutter.
Next, in the same manner as described above, the blade 57 is placed on the surface 66A of the base 66, and the measuring element 70B is lowered and applied to the blade edge 57C of the blade 57.
These operations are repeated for the entire blade 57 until Q1 becomes R.
When Q1 becomes R, the cutter height of the entire cutter 57 becomes L1.

On the other hand, when Q1 is the same as R when the blade 57 is first placed on the surface 66A of the base 66, the blade height is equal to or smaller than L1. .
Which of these is not determined by the value of Q1.
Therefore, in this case, the first bolts 59 are once rotated until Q1 becomes larger than R, that is, as shown in FIG.
After the state shown in FIG. 12 is reached, the first bolt 59 is rotated in the same manner as when Q1 is greater than R, and the height of the blade is set to L1.
After the height of the blade is set to L1 in this way, the first nut 63 of each first bolt 59 is rotated so as to move toward the blade 57, and the first nut 63 is pressed against the blade 57.
As a result, the female threaded portion of the first nut 63 and the male threaded portion of the first bolt 59 are pressed against each other, the maximum frictional force acting between the female threaded portion and the male threaded portion is increased, and the position of each first bolt 59 with respect to the cutter 57 is increased. Is almost fixed.

The blade 57 configured as described above is fixed to the rack 55 as shown in FIG. 11, and for this purpose, the blade 57 is configured as follows.
In FIG. 11, reference numeral 65 denotes a back blade having a curved surface 63 </ b> A on the upper surface, which is fixed to the base 55 by a 20th bolt 67.
Reference numeral 55 </ b> A denotes an inclined mounting surface formed by cutting out the stand 55.
Reference numeral 69 denotes a large number of contact members arranged at appropriate intervals in parallel with the cutting edge 57C of the blade 57.
Each abutting member 69 is supported by a bearing 73 provided on a holding member 71 fixed to the base 55 so that a portion near the base 55 from the center in the vertical direction can be reciprocally rotated in the arrow direction.
Therefore, when acting on the abutting member 69 only by its own weight, it rotates as shown by a two-dot chain line in FIG. 11 so that the upper part is inclined to the left side and the lower part is inclined to the right side.
On the other hand, as shown in FIG. 11, a hydraulic cylinder 75 having a piston rod 75A and its tip 75B is provided at the lower part of the pedestal 55 so as to face each of the contact members 69.

In such a configuration, when the hydraulic cylinder 75 is moved backward in advance and the piston rod 75A is moved backward to wait at a position indicated by a two-dot chain line in FIG. 11, the abutting member 69 is also a two-dot chain line as described above. Wait for rotation at the indicated position.
In this state, as described with reference to FIG. 12, the blade 57, whose length is determined so that each first bolt 59 protrudes downward from the female screw 61, is lifted and moved by the crane, and the bottom 59 </ b> A of the first bolt 59 is moved. Is placed on the placement surface 55A as shown in FIG.
The rake face 57A of the blade 57 is brought into contact with the back blade 65.
Next, the hydraulic cylinder 75 is moved forward, and the piston rod 75A is moved forward from the retracted position to the left.
Therefore, when the tip end portion 75B hits against and presses against the abutting member 69, the abutting member 69 rotates clockwise around the bearing 73 in FIG. 11, and the upper portion of the abutting member 69 is indicated by a solid line in FIG. In addition, the cutting tool 57 can be clamped and fixed between the cutting edge 57 and the back cutting edge 65 with the rake face 57 </ b> A of the cutting edge 57 contacting the back cutting edge 63.

In such a fixed state, the raw wood 51 rotating as described above is continuously cut by the cutter 57.
Eventually, when the vicinity of the cutting edge of the blade 57 is worn sequentially and good cutting cannot be performed, the blade 57 is removed from the base 55, and a new blade (not shown) is clamped and fixed in the same manner as described above.
When removing the hydraulic cylinder 75, the hydraulic cylinder 75 is moved backward, and as shown in FIG. 11, the contact member 69 is turned to a standby position at a position indicated by a two-dot chain line.
Next, the cutter 57 is similarly removed from the stand 55 by a crane, and the cutting edge 57C of the cutter 55 is polished by a polishing machine (not shown).
The reason for using this crane is that the blade 57 is too heavy and dangerous to remove manually.

Japanese Patent No. 3689132

As described above, when the blade 57 that needs to be polished is removed from the base 55, a crane is usually used.
In the operation using the crane, the lifting member at the standby position is moved to the blade 57, the member is lowered, the member is hooked on the blade 57, the member is lifted, and the member is moved to the standby position. Each movement operation is required.
Further, after removing the knife 57 that needs to be polished from the base 55, in order to sandwich and fix the polished knife in the same manner as described above, the lifting member is moved onto the polished knife 57, the member is lowered, The following operations are required: an operation of hooking the member on the polished blade, a lifting operation of the member, a movement of the member onto the rack 55, and a lowering operation of the member.
Although the weight of the blade 57 is several hundred kilograms, if the above operations are performed at high speed, there is a high possibility that the blade 57 will collide with an operator or an apparatus.
As a result, it takes a long time to remove the blade 57 that needs to be polished from the rack 55 and to clamp and fix the polished blade on the rack 55, which is the main cause of lowering productivity. It was.

Of course, if the weight of the blade 57 is reduced by reducing the width (hereinafter referred to as thickness) of the blade 57 in FIGS. 11 and 12, the blade 57 is manually removed and polished. The above-mentioned operation of the blade can be performed, and the time can be shortened compared with the case where a crane is used.
However, when the thickness of the blade 57 is reduced, it becomes difficult to form the female screw 61 for screwing the first bolt 59 shown in FIG. 12 for the following reason.
When the first bolt 59 screwed into the female screw 61 is subjected to an external force when cutting the raw wood or holding and fixing it to the table 55, it is necessary that the mutual positional relationship does not change.
However, as shown in FIG. 12, by forming the female screw 61, the thickness of the remaining portion of the blade 57 becomes thin, and when it receives an external force, it is easily deformed and the mutual positional relationship changes. End up.
For this reason, the distance between the cutting edge 57C of the blade 57 and the bottom 59A of the first bolt 59 cannot be set to a predetermined value, and normal single plate cutting cannot be performed.

The present invention relates to a combination blade in which a support member is fixed to an end portion of a blade having a reduced thickness opposite to the blade edge, in a direction from the side opposite to the blade edge of the support member toward the blade edge. An internal thread is provided, and the length of the bolt that is screwed in the above direction from the side opposite to the cutting edge of the internal thread is changed from the support member.

  In the present invention, the blades can be exchanged manually, and the mutual positional relationship can be maintained even when the blades are thin.

It is side surface explanatory drawing of the 1st combination blade P2 in Example 1. FIG. It is a partial front view of the state which fixed the 1st combination cutter P2 to the well 1 of the well-known veneer lace. FIG. 3 is a partial cross-sectional side view as seen in the direction of the arrow from the one-dot chain line II in FIG. 2. FIG. 6 is a partially sectional side view illustrating a state in which the blade pressing member 21 is rotated and waited in a direction away from the back blade 3 in order to fix the first combination blade P2 to the base 1; FIG. 5 is a partially sectional side view illustrating a state in which the first combination blade P2 is inserted between the back blade 3 and the blade pressing member 21 from the state of FIG. FIG. 6 is a partial cross-sectional side view showing a state in which the blade pressing member 21 is rotated and waited in a direction away from the back blade 3 when the first combination blade P2 is removed. 4 is a perspective explanatory view of a third support member 31. FIG. It is a perspective explanatory view of the second cutter 37. FIG. 6 is a partial perspective view illustrating a state in which a third support member 31 is fixed to a second blade 37. It is side surface explanatory drawing of Example 2. FIG. It is side surface explanatory drawing of a prior art. It is side surface explanatory drawing of a jig | tool.

  Next, examples of the present invention will be described.

In FIG. 1, P2 is a first combination blade.
Reference numeral 7 denotes a first cutting tool including a rake face 7A, a flank face 7B, a cutting edge 7C, and a face 7D parallel to the rake face 7A.
In FIG. 1, the 1st blade 7 is formed with the 1st internal thread 7G penetrated in the left-right direction so that it may mention later.

Further, the bottom portion 7E of the first cutter 7 has a first support member 9 having a L-shaped first support member 9 parallel to the cutting edge 7C, as shown in FIG. 1, as viewed in a virtual section for cutting the cutter in the thickness direction. A plurality of pieces are fixed at regular intervals in the direction as described later.
As shown in the drawing, each first support member 9 includes a lower contact portion 9A that contacts the bottom surface 7F of the first cutter 7, and an upper contact portion 9B that contacts the surface 7D of the first cutter 7.
A circular first first hole 9C that penetrates in the left-right direction in FIG. 1 is formed in the upper contact portion 9B of each first support member 9 at a position facing the first female screw 7G.
The diameter of the first hole 9C is slightly larger than the diameter of the threaded portion of the first bolt 11 described later.
In addition, when each first support member 9 is applied to the first blade 7 as shown in FIG. 1, first female screws 7 </ b> G that penetrate the same shape in the left-right direction at the same positions as the first holes 9 </ b> C. Form.
In FIG. 1, the first bolt 11 is screwed from the first hole 9 </ b> C toward the first female screw 7 </ b> G from the left side, and the first blade 7 and each first support member 9 are fixed.
The length of the first bolt 11 in the horizontal direction in FIG. 1 is such that the tip of the threaded portion of the first bolt 11 does not protrude rightward from the rake face 7A of the first cutter 7.

Further, as shown in FIG. 1, each first support member 9 is formed with a second female screw 9D penetrating in the vertical direction parallel to the surface 7D.
As shown in FIG. 1, the second female screw 9 </ b> D has a third bolt 15 having a long threaded portion and a first nut 13 screwed into the head 15 </ b> A from the bottom, as shown in FIG. 1. The member 9 is screwed in a state where it protrudes with a length as appropriate.

When fixing the first combination cutter P2 to the base 1, it is necessary to adjust the third bolt 15 in advance so that the distance between the cutting edge 7C and the head 15A of the third bolt 15 is L1. .
This adjustment is performed in the same manner as the method described with reference to FIG. 12 in the prior art, and the description thereof is omitted here.
After the adjustment, in FIG. 1, the first nut 13 is screwed toward the first support member 9 and pressed against the first support member 9 to fix the position of the third bolt 15 with respect to the first support member 9.
As described above, the first cutter 7 and the plurality of first support members 9 integrated and the distance adjusted as described above is hereinafter referred to as a first combination cutter P2.
The first combination cutter P2 is fixed to the gantry 1 as follows.

Reference numeral 17 denotes a second support member fixed to the base 1 in a state of protruding in the horizontal direction in FIG.
In FIG. 3, a first bearing 19 is fixed to the left end of each second support member 17 and appears as shown in FIG.
The first shafts 19A of the blade pressing member 21 are inserted into the first bearing 19 as shown in FIG. 2 and FIG.
As a result, in FIG. 3, each blade pressing member 21 is reciprocally rotatable in the direction of the arrow with the first bearing 19 as the rotation center.
Moreover, as shown in FIG. 3, the 1st notch part 21B is formed in each blade pressing member 21 so that the rotation can be performed without a problem.

Further, as will be described later, a second notch is formed at the lower end of each blade pressing member 21 at the center in the left-right direction as shown in FIG. 2 in order to connect with the tip of the piston rod 25B of the hydraulic cylinder 25. Part 21C is formed.
As shown in FIG. 2, both ends of the second shaft 21E that is rotatably inserted in the second bearing 21D provided inside the connection member 25C having a rectangular parallelepiped shape are fixed to each second notch portion 21C.
In FIG. 3, reference numeral 25 denotes a hydraulic cylinder provided at the lower end of the gantry 1 with a pipe (not shown), a motor (not shown), etc., for supplying and discharging oil, provided for each blade pressing member 21. .
A terminal portion 25A of each hydraulic cylinder 25 is rotatably supported at the lower end of the rack 1 by a bearing (not shown).
On the other hand, the tip of the piston rod 25B of each hydraulic cylinder 25 is fixed to the corresponding second bearing 21D.
In addition, each cutter holding member 21 is reciprocally rotatable in the direction of the arrow by the operation of each hydraulic cylinder 25, and this operation is performed in response to a manual operation signal from the driver.

2 and 3, reference numeral 23 denotes an auxiliary pressing member, which is formed with a concave portion 23 </ b> A that matches the shape of the upper end portion of the blade pressing member 21. The upper end portion of the blade pressing member 21 is engaged with the concave portion 23 </ b> A. Position.
Although not shown, the auxiliary pressing member 23 is embedded with a plurality of magnets on the surface that contacts the blade pressing member 21 and fixed to the blade pressing member 21 by magnetic force.
The auxiliary pressing member 23 is positioned at a constant interval in the left-right direction in FIG. 2, that is, between the first support members 9 adjacent in the direction when the first combination cutter P2 is fixed to the rack 1, as will be described later. Provide to do.
The auxiliary pressing member 23 is formed with a second notch 23B on the first blade 7 side in order to fix the first combination blade P2.

Next, the operation of mounting the first combination cutter P2 on the gantry 1 configured as described above will be described.
First, from the state of FIG. 3, a driver's manual operation signal is issued, and the piston rod 25 </ b> B of the hydraulic cylinder 25 is moved backward.
Therefore, as shown in FIG. 4, the blade pressing member 21 integrally with the auxiliary pressing member 23 rotates as indicated by an arrow about the first shaft 21 </ b> A, and stops and waits at the retreat limit position of the piston rod 25 </ b> B. .
In this state, the first combination blade P2 is inserted between the back blade 3 of the table 1 and the auxiliary pressing member 23 as shown in FIG.
At this time, the head 15A of the third bolt 15 of the first combination cutter P2 is brought into contact with the mounting surface 3A of the stand 1 and the rake face 7A of the first cutter 7 is brought into contact with the back blade 3.
Next, the hydraulic cylinder 25 is actuated so that the piston rod 25B moves forward by manual work.
Therefore, the blade pressing member 21 integrally with the auxiliary pressing member 23 rotates in the direction opposite to that shown in FIG. 4 around the first shaft 21A, and the auxiliary pressing member 23 of the first combination blade P2 in the above state is rotated. As shown in FIG. 3, the first combination blade P <b> 2 is fixed to the table 1 by being pressed against the first blade 7.

In the state fixed as mentioned above, the log which rotates with the 1st cutter 7 is cut with a veneer race like FIG.
When cutting continues and the cutting edge 7C of the first cutting tool 7 is worn and needs to be polished, the first combination cutting tool P2 is removed from the gantry 1.
In this case, from the state shown in FIG. 3, the driver issues an operation signal to cause the piston rod 25 </ b> B of the hydraulic cylinder 25 to move backward.
Therefore, as shown in FIG. 6, the blade pressing member 21 and the auxiliary pressing member 23 integrally rotate counterclockwise about the first shaft 21A, and similarly stop at the retreat limit position of the piston rod 25B. To do.

On the other hand, the first combination blade P2 was pressed against the back blade 3 by the auxiliary pressing member 23 as described above.
Therefore, when the blade pressing member 21 and the auxiliary pressing member 23 are rotated, there is no need to press the first combination blade P2, and the first combination blade P2 also has the head 15A of the third bolt 15 held by its own weight. As a center, the blade rotates together with the blade pressing member 21 and the like, as shown in FIG.
In this state, the driver manually removes the first combination blade P2 and polishes it with the polishing apparatus in the same manner as described above.
After the polishing, similarly to the method shown in FIG. 12, the third bolt 15 is adjusted so that the distance L1 between the cutting edge 7C and the head 15A of the third bolt 15 is adjusted again, and then the table 1 is moved to. Fix it.
As described above, in the configuration of the first embodiment, the weight of the first combination blade P2 can be reduced, and the first combination blade P2 is fixed to the table 1 and removed from the table 1 manually. be able to.

Next, Example 2 will be described.
FIG. 7 is a perspective explanatory view showing the third support member 31 in Example 2 in three dimensions in the T direction, the S direction, and the U direction.
As shown in the figure, the third support member 31 has a rectangular parallelepiped shape, the width in the U direction is L2, the height in the T direction is L3, and the length in the S direction is L4. A third cutout 31A is formed.
Further, a portion (hereinafter referred to as a protruding portion) indicated by oblique lines adjacent to the third cutout portion 31A in the S direction on the third support member 31 is referred to as 31E, and the third cutout portion 31A is parallel to the S direction. The end face is referred to as 31F, and the width in the S direction of the protruding portion 31E is L5 as shown.
Similar to the first embodiment, the third support member 31 has two female screws.
That is, in the T direction, the fourth female screw 31B corresponding to the first hole 9C is formed penetrating to a position on the left side of the side surface 31D constituting the third notch 31A and avoiding the protruding portion 31E.
Further, as shown in FIG. 7, in the U direction, the second hole 31C is formed penetrating from the third notch 31A side at a position where the distance from the side surface 31D of the third notch 31A is L6. ing.
The diameter of the second hole 31C is slightly larger than the diameter of the threaded portion of the fourth bolt 39 described later.
As shown in the figure, a fourth bolt 35 having a second nut 33 screwed into the head portion 35A is screwed into the fourth female screw 31B from below in the T direction.
A plurality of third support members 31 configured as described above are prepared.

FIG. 8 is a partial perspective explanatory view showing the second cutter 37 used in the second embodiment in three dimensions in the T direction, the S direction, and the U direction, similarly to FIG. 7.
As shown in the figure, the second cutter 37 includes a rake face 37A, a flank face 37B, a blade edge 37C, a face 37D parallel to the rake face 37A, and a bottom face 37E.
Furthermore, on the bottom surface 37E of the second cutter 37, as shown in FIG. 8, a fourth notch 37F having a support surface 37H formed in parallel with the bottom surface 37E is parallel to the blade edge 37C, that is, spaced in the S direction. A plurality of them are formed.
As will be described later, the lengths of the fourth cutout portions 37F in the T direction, the S direction, and the U direction are inserted into the fourth cutout portions 37F so that the protruding portions 31E of the third support member 31 enter and combine with each other. The length should be sufficient.
That is, the length of the fourth notch 37F in the three directions is L3 in the T direction, L5 in the S direction, and L4 in the U direction, and is slightly longer than the third support member 31. 37F is formed.

Further, as shown in FIG. 8, a sixth female screw 37G having a diameter equal to that of the second hole 31C passes through the fourth cutout portion 37F of the second blade 37 in the U direction at the following position. Provide.
That is, as shown in the drawing, the distance from the right end surface of the fourth notch 37F to the circle of the sixth female screw 37G is L6 on the surface 37D, and the sixth female screw 37G from the virtual extension line of the upper end surface of the fourth notch 37F. The distance to the circle is L7.

Each 3rd support member 31 is made into the some 4th notch part 37F of the 2nd cutter 37 comprised in this way, and the location 31E shown in the oblique line of FIG. 7 of the 3rd support member 31 as shown in FIG. Are inserted so that the support surface 37H of the fourth cutout portion 37F faces each other, and a combination is obtained as a second combination blade P3.
In this combined state, the second hole 31C of the third support member 31 and the sixth female screw 37G of the second blade 37 are positioned side by side in the U direction.
Next, as shown in FIG. 9, the fourth bolt 39 is screwed from the second hole 31 </ b> C toward the sixth female screw 37 </ b> G, and the third support member 31 and the second blade 37 are fastened and fixed.
The length of the threaded portion of the fourth bolt 39 is set such that the tip of the fourth bolt 39 does not jump out of the parallel surface 37D of the second blade 37 when the screw is fixed.
As described above, a plurality of third support members 31 are combined and integrated with the second blade 37 using the fourth bolts 39, and the fourth bolts 35 are screwed into the third support members 31 as described above. What has been configured is hereinafter referred to as a second combination blade P3.

The fourth bolt 35 is adjusted so that the distance between the cutting edge 37C of the second combination cutter P3 and the head 35A of the fourth bolt 35 is L1, which is the apparatus shown in FIG. And in the same way.
After the distance is set to L1, the second nut 33 is screwed to the third support member 31 side and pressed against the third support member 31 to fix the position of the fourth bolt 35 with respect to the third support member 31.
The second combination cutter P3 whose distance is adjusted as described above is fixed to the gantry 1 by the same operation as that described for the first combination cutter P2.
Further, by continuing to cut the raw wood in this state, when it becomes necessary to wear and polish the cutting edge 37C, the second combined blade P3 is removed from the base 1 in the same manner as the operation described in the first combined blade P2. Grind.
After the polishing, similarly to the method shown in FIG. 12, the fourth bolt 35 is adjusted so that the distance between the blade edge 37C and the head portion 35A of the fourth bolt 35 becomes L1 again.

In the second embodiment, as shown in FIG. 7, the fourth female screw 31B is formed in the S direction in a separated positional relationship with respect to the third notch 31A.
Therefore, with respect to the end surface 31F, which is the surface of the third support member 31 that contacts the second blade 37,
In the U direction, the fourth female screw 31B can be formed in an approached state.
As a result, when the second combination cutter P3 is fixed to the base 1, the distance between the second cutter 37 and the fourth bolt 35 is shorter than that in the first embodiment in the left-right direction of FIG. .
As a result, the moment in the clockwise direction in FIG. 10 generated by the force received by the second cutter 37 when cutting the log can be made smaller than that in the first embodiment.

Next, a modified example of the present invention will be described.
1. In both of the above-described embodiments, the first support member 9 and the first blade 7 and the third support member 31 and the second blade 37 are combined to each other, and the portions that contact each other are shown as flat surfaces. It was.
However, for example, a plurality of protrusions may be provided on the support member side so as to contact the first blade 7 or the second blade 37.

2. In both the above-described embodiments, the first female screw 7G of the first blade 7 or the second hole 31C of the second blade 37 is formed through the blades 7, 37.
However, if it is sufficient for the fixing, the first female screw may be formed as a female screw that does not penetrate and the bolts may be screwed in similarly.
3. In both of the above-described embodiments, as the means for fixing the first blade 7 or the second blade 37 and the support member, the second bolt screwed from the second female screw to the first female screw is used.
However, both may be fixed by an adhesive or welding.
4. In the above embodiment, one first nut 13 or second nut 33 is used to fix the third bolt 15 or the fourth bolt 35. However, two nuts are used, so-called double nut system. It can be fixed with.
5. In both embodiments, the tip of the first bolt 11 does not protrude from the rake face 7A of the first cutter 7 and the tip of the fourth bolt 39 does not protrude from the rake face 37A of the second cutter 37. did.
However, if the combined blades can be fixed to the stand 1 without any problem, the tips of both the bots 11 and 39 may be slightly protruded from both surfaces 7A and 37A.

DESCRIPTION OF SYMBOLS 1 ... Scissor stand 7 ... 1st cutter 9 ... 1st support member 11 ... 1st volt | bolt 13 ... 1st nut 15 ... 3rd volt | bolt 23 ... auxiliary pressing member 31. 3rd support member 31A 3rd notch 31E Projection 33 2nd nut 35 4th bolt 37 2nd cutter 39 5th bolt

Claims (4)

A combination blade consisting of the following components.
The cutting edge,
A rake face following the cutting edge, a flank face following the cutting edge, a first face following the rake face, a face following the flank face and intersecting the flank face, and parallel to the first face. A blade having a second surface and a first end on the opposite side of the blade edge in a direction parallel to the rake face and away from the blade edge;
A support member combined with the blade,
The support member includes a first contact location in which the width of the cutter in the thickness direction is substantially equal to the thickness of the cutter, and a second contact location orthogonal to the first contact location, excluding the two contact locations. A first female screw provided through the first end portion in a direction parallel to the second contact location;
When the first female screw is combined with the blade, the threaded portion is partially screwed in a state where the head protrudes a predetermined length into the first female screw from the edge side opposite to the cutting edge. The threaded portion of the first bolt that is outwardly exposed from the opposite end edge is rotated so that at least one nut moves toward the opposite end edge, The first bolt hitting the support member,
In such a support member, the first contact portion is combined with the first end portion of the blade and the second contact portion is brought into contact with the second surface of the blade,
Furthermore, fixing means for fixing the blade and the support member in the combined state. The fixing means is formed in the thickness direction of the blade and at positions facing each other.
A bolt that is inserted and screwed into a hole that passes through the support member and a female screw of the blade so as not to protrude from the first surface of the blade toward the female screw from the through hole. The combination blade according to 1. The combination blade according to claim 1 or 2, wherein when the support member is combined with the blade, the shape viewed in a virtual cross section for cutting the blade in the thickness direction is L-shaped. The blade further includes a first notch formed in a direction from the first end on the side opposite to the blade edge toward the blade edge with an interval in the direction in which the blade edge is continuous. A second end is provided at a position close to the blade edge,
The support member further has a step in the direction toward the cutting edge by forming a second notch portion having a width in the thickness direction of the blade substantially equal to the thickness of the blade on the second surface side of the blade. The two first contact locations in the connected state, the first contact location on the side close to the cutting edge is a shape that can enter the first notch,
The at least one first contact portion is combined with the first end portion or the second end portion of the blade and the second contact portion is brought into contact with the second surface of the blade. 2. The combination blade according to 2.