JPH0580702U - Moulder cutter - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a molding cutter capable of obtaining a smooth cutting surface without fuzz. [Structure] Four main blade mounting bases 1 on the cutter body 10
1, a main blade 12 is fixed to the main blade 12 by brazing. A back blade 14 is provided so as to overlap the main blade mounting base 11, and the back blade 14 is pressed and fixed to the main blade mounting base 11 by a back blade fixing block 13. The head portion 19a of the eccentric head bolt 19 is arranged in the through hole 17 formed in the back blade 14, so that the back blade 14 can be moved up and down.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a molder cutter used for molding wood.

[0002]

[Prior Art]

 Conventionally, this type of cutter has generally been configured such that a plurality of blade edges are replaceably fixed to a cutter body attached to a rotary shaft by bolts or the like.

By the way, when wood is cut with this type of cutter, a phenomenon of so-called tip cracking occurs, and the cutting surface is fluffed, which sometimes results in a surface condition called an inversion. It is known that such a phenomenon occurs when the relationship between the rotation direction of the cutter and the fiber direction of the material is improper, but the fiber direction of the material locally changes even with one piece of wood. It is impossible to properly adjust this to the rotation direction of the cutter.

In order to suppress such fluffing on the surface, it is conceivable to attach a back blade to the back side of the cutting edge, as is applied to a finishing planer. However, unlike the case where the cutting edge is on the fixed side and the material is relatively moved like in a finishing machine, there is a special circumstance that the cutter body is rotated at a high speed of 3000 rpm or more in the molding cutter. .. Moreover, since the proper position of the back blade differs depending on the softness of the material, there is a situation in which if this is fixedly attached to the main blade, a sufficient effect cannot be expected. For this reason, conventionally, a molder cutter with a back blade attached has not been provided, and after processing with a molder, in order to remove fluff due to the inversion, it is necessary to finish with a profile sander etc. It was common.

[0005]

[Problems to be Solved by the Invention] As described above, fluffing is likely to occur on the finished surface by the conventional molding machine, and improvement in this point has been desired.

Therefore, an object of the present invention is to provide a molding cutter capable of obtaining a smooth cutting surface without fuzz.

[0007]

[Means for Solving the Problems]

 The molder cutter of the present invention includes a cutter body attached to the rotary shaft, a main blade fixed to the cutter body by brazing, and a back blade provided so as to overlap with the surface of the main blade in the cutting direction. It is characterized in that it is provided with a back blade position adjusting mechanism for adjusting the position of the back blade with respect to the main blade and a back blade fixing mechanism for fixing the back blade to the cutter body.

[0008]

[Action]

 In the molder cutter of the above means, since the main blade attached to the cutter body is provided with the back blade, the material is cut by the main blade, and at the same time, the back blade causes the material to crack. Will be suppressed. In this case, since the main blade is fixed to the cutter body by brazing, it can sufficiently withstand the high speed rotation of the cutter body.

Further, by releasing the back-blade fixing mechanism, the position of the back-blade with respect to the main blade can be adjusted by the back-blade position adjusting mechanism, so that the position of the back-blade is properly adjusted according to the softness of the material. Can be set to.

[0010]

[Effect of the device]

 As described above, according to the molding cutter of the present invention, the occurrence of the tip cracking phenomenon is suppressed by the back blade that is provided on the main blade, so that a smooth cutting surface can be obtained, and the position adjustment of the back blade is only possible. Can be performed easily and appropriate cutting conditions can be set.

[0011]

【Example】

 Hereinafter, some embodiments of the present invention will be described in detail with reference to the drawings.

First Embodiment This embodiment is shown in FIGS. 1 to 3. Although only a part is shown in FIG. 1, the cutter body 10 has a substantially columnar shape as a whole, and four main blade mounting base portions 11 are provided on the outer peripheral surface thereof at an angular interval of 90 °, for example. Has been done. Of the main blade mounting base 11, the tip of the side surface that is rearward with respect to the rotation direction of the cutter body 10 (indicated by the arrow in FIG. 1) is an inclined surface and is sharp as shown in FIG. A step portion 11a which is further lowered is formed on the surface opposite to the tip portion, and the main blade 12 is fixed by brazing so as to be fitted in the step portion 11a.

On the other hand, a flat cutting surface 10b is formed on the cutter body 10 on the side that is ahead of the main blade mounting base 11 in the rotational direction, and the back blade fixing block 13 is fixed thereto by brazing. Has been done. The back blade fixing block 13 has a rectangular shape whose width is substantially equal to the axial dimension of the cutter body 10, and is fixed to the main blade mounting base 11 at a predetermined interval.

A back blade 14 is provided so as to overlap the surface of the main blade 12 on the cutting direction side. This has a substantially rectangular shape, and the opposite surface overlaid with the main blade 12 has an inclined surface with a sharp tip, and the thickness dimension is the main blade mounting base 11 and the back blade fixing block 13. Is approximately equal to the spacing dimension between and. As shown in FIG. 3, vertically elongated oblong bolt insertion holes 15 are formed at three locations on the back blade 14, and fixing bolts 16 penetrate the bolt insertion holes 15 from the back blade fixing block 13 side. The back blade 14 is screwed into the main blade mounting base 11, whereby the back blade 14 is sandwiched between the back blade fixing block 13 and the main blade mounting base 11 and fixed to the cutter body 10.

Further, as shown in FIG. 1, the back blade 14 is formed with two through holes 17 located between the respective bolt insertion holes 15, and the back blade 14 is formed in correspondence with each through hole 17. A screw hole 18 is formed in the fixed block 13, and a shaft portion 19 a of an eccentric head bolt 19 is screwed into the screw hole 18. The head portion 19b of the eccentric head bolt 19 and the shaft portion 19a are in a positional relationship in which the centers are displaced from each other. 14 can be moved up and down. Further, an adjusting groove 19c is formed in the end surface portion of the shaft portion 19a of the eccentric head bolt 19, and a minus driver can be inserted therein. These mechanisms constitute a back blade position adjusting mechanism 20 for adjusting the position of the back blade 14 with respect to the main blade 12 as will be apparent from the following description of the operation.

Next, the operation of the above configuration will be described. At the time of cutting, the tip of the back blade 14 is slightly retracted from the tip of the main blade 12, but in order to perform excellent cutting, the amount of the recess may be adjusted according to the softness of the material. desirable. In this embodiment, the adjustment can be performed as follows.

First, the fixing bolt 16 that fixes the back blade 14 is loosened. As a result, the back blade 14 is in a state of being vertically movable in FIG. Therefore, the tip of a flat head screwdriver is inserted into the adjusting groove 19c formed in the shaft portion 19a of the eccentric head bolt 19, and the eccentric head bolt 19 is rotated. Then, since the head portion 19b is eccentric with respect to the shaft portion 19a, the back blade 14 is displaced up and down according to the amount of rotation of the eccentric head bolt 19. Therefore, the amount of rotation of the two eccentric head bolts 19 should be adjusted so that the desired amount of retreat of the back blade 14 can be obtained, and if it is obtained, the fixing bolt 16 can be tightened tightly. As a result, the back blade 14 is firmly fixed to the cutter body 10 again.

When the wood is cut by the cutter adjusted in this way, the chips are bent by the back blade 14 before the tip cracking by the main blade 12 progresses too deeply into the material, so the tip cracking during cutting is performed. The occurrence of phenomena is suppressed, and a smooth cutting surface with no fuzz is obtained. Of course, since the main blade 12 is directly brazed to the cutter body 10, even if the cutter body 10 rotates at a high speed of 3000 rpm or more, this can be sufficiently endured.

Second Embodiment This embodiment is shown in FIGS. 4 to 6. The difference from the first embodiment is mainly in the back blade position adjusting mechanism. Other configurations, that is, the four main blade mounting bases 11 are projected on the cutter body 10 at equal angular intervals, and the main blades 12 are brazed and fixed to these, are similar to the first embodiment. Therefore, the same parts are designated by the same reference numerals and the description thereof is omitted.

The back blade fixing block 21 has an upper end curved toward the main blade mounting base 11 side, a lower end fixed to the cutter body 10, and two screw holes 21 a near the lower end. A taper block 22 having an inclined surface on the upper surface is provided between the back blade fixing block 21 and the main blade attachment base 11 so as to be movable in the left-right direction in FIG. 4, and two taper blocks are provided on the inclined surface. The dovetail groove 23 is formed along the inclined surface. An adjusting screw 24 having an engaging disc portion 24a is screwed into the screw hole 21a of the back blade fixing block 21, and the engaging disc portion 24a is formed in the engaging groove 25 formed in the back blade fixing block 21. Is engaged with. Thus, by inserting a flat-blade screwdriver into the adjusting groove 24b formed on the shaft end surface of the adjusting screw 24 and rotating the adjusting screw 24, the taper block 22 can be moved in either the left or right direction in FIG. it can.

On the other hand, the lower end surface of the back blade 26 has an inclination corresponding to the inclined surface of the taper block 22 and, as shown in FIG. 5, is formed with a protrusion 27 that can be engaged with the dovetail groove 23. .. The back blade 26 has its ridge 27 engaged with the groove 23 and is integrated with the taper block 22 with its movement restricted in the vertical direction, but it is movable in the horizontal direction. Has been done. Therefore, when the taper block 22 moves left and right, the back blade 26 moves up and down along the inclined surface. In the present embodiment, a series of these mechanisms constitutes the back blade position adjusting mechanism 28.

Further, a through hole 26 a is formed in the back blade 26, and a fixing bolt 29 provided through the back blade fixing block 21 penetrates through the through hole 26 a and is formed in the main blade mounting base 11. It is screwed into the screw hole. As a result, the back-blade fixing block 21 tightens the back-blade 26 with the main-blade mounting base 11, thereby firmly fixing the back-blade 26 to the cutter body 10.

Also in this embodiment, the back blade 26 can be adjusted to a desired position with respect to the main blade 12 by loosening the fixing bolt 29 and using the back blade position adjusting mechanism 28. That is, for example, when the amount of retreat of the back blade 26 from the tip of the main blade 12 is to be increased, the adjusting screw 24 is rotated in the screw retreating direction. Then, the taper block 22 moves leftward in FIG. 4 as the adjusting screw 24 is screwed back, and the back blade 26 retracts downward in FIG. 4 accordingly. On the contrary, when it is desired to reduce the amount of retreat of the back blade 26 from the tip of the main blade 12, the adjusting screw 24 may be rotated in the screw advancing direction.

Therefore, the same effects as those of the first embodiment can be obtained by the above embodiment.

Third Embodiment This embodiment is shown in FIG. The difference from the second embodiment resides in the back-blade position adjusting mechanism 31. Among them, the coil spring 33 applies a downward force to the back-blade 32 in the figure. Other configurations, that is, four main blade mounting bases 11 are projected on the cutter body 10 at equal angular intervals, and the main blades 12 are brazed and fixed to these, and the taper block 22 and the adjusting screw 24 are also provided. The configuration in which the back blade 32 is moved up and down by utilizing is similar to that of the second embodiment. Therefore, the same parts are designated by the same reference numerals and the description thereof is omitted.

The coil spring 33 is housed together with a pressing element 35 in a housing hole 34 formed obliquely through the back blade fixing block 21, and is held by a screw lid 36. The tip end of the pressing member 35 is in contact with a receiving recess 37 formed in the back blade 32, which constantly urges the back blade 32 downward.

According to this configuration, in addition to the same effects as those of the above-described embodiments, when the adjusting screw 24 is screwed back to retract the back blade 32, the back blade 32 is moved by the elastic force of the coil spring 33. Since it can be smoothly lowered, the position of the back blade 32 can be easily adjusted, which is also an advantage.

Fourth Embodiment This embodiment is shown in FIGS. 8 to 10. The difference from the above-described embodiments is mainly in the fixing structure of the back blade 41. Similar to the first embodiment, the structure of the main blade 12 side, that is, the four main blade mounting bases 11 are protruded from the cutter body 10 at equal angular intervals, and the main blades 12 are brazed and fixed to them. Therefore, the same reference numerals are given to the same portions and the description will be omitted.

As shown in FIG. 9, three bolt insertion holes 42 are formed in the back blade 41, and screw holes 43 are formed in the main blade mounting base 11 so as to correspond to the respective bolt insertion holes 42. ing. A fixing bolt 44 is screwed into the screw hole 43 from the side of the back blade 41 with a spring 45 sandwiched therebetween, so that the back blade 41 can be fixed to the main blade mounting base 11 in an overlapping state. The bolt insertion hole 42 has a margin in the vertical direction, and when the fixing bolt 44 is loosened, the back blade 41 can be moved vertically with respect to the main blade mounting base 11 or the main blade 12.

Further, as shown in FIG. 10, two screw holes 46 are formed in the main blade mounting base 11 between the screw holes 43, and the back blade 41 corresponds to each screw hole 46. A cam receiving hole 47 is formed. An eccentric head bolt 48 is screwed into the screw hole 46 from the back blade 41 side, and a head portion 48a eccentric from the shaft portion is located in the cam receiving hole 47. A hexagonal hole 48b is formed in the head portion 48a, and if a hexagonal wrench (not shown) is inserted and rotated, the head portion 48a of the eccentric head bolt 48 rotates and the back blade 41 moves up and down. In this embodiment, a series of constructions using the eccentric head bolt 48 constitutes the back blade position adjusting mechanism 49.

Therefore, in this embodiment, in order to adjust the retreat amount of the back blade 41 with respect to the main blade 12, the fixing bolt 44 may be loosened, and in that state, the eccentric head bolt 48 may be rotated by an appropriate amount. After the adjustment, the back blade 41 is fixed by tightening the fixing bolt 44 again. It is needless to say that this structure can also obtain the same effect as that of the first embodiment.

[Brief description of drawings]

1 shows a first embodiment of the present invention and is a cross-sectional view taken along the line II in FIG.

[Fig. 2] Partial front view of the molding cutter

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view showing a second embodiment of the present invention.

FIG. 5 is a sectional view taken along line VV in FIG.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a partial sectional view showing a third embodiment of the present invention.

FIG. 8 is a partial front view showing a fourth embodiment of the present invention.

9 is a sectional view taken along line IX-IX in FIG.

FIG. 10 is a sectional view taken along line X-X in FIG.

[Explanation of symbols]

 10 ... Cutter body 12 ... Main blade 14, 32, 41 ... Back blade 16, 29, 41 ... Fixing bolt 19 ... Eccentric head bolt 20, 27, 31 ... Back blade position adjusting mechanism

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Ikuro Iezaki 31-25 Uchihamacho, Mizuho-ku, Nagoya City Amitekku Co., Ltd. (72) Hiroki Kondo 31-25 25 Uchihamacho, Mizuho-ku, Nagoya City Amitek Co., Ltd. Company (72) Inventor Takashi Kusunii, 31-25 Uchihamacho, Mizuho-ku, Nagoya City Amitek Co., Ltd. (72) Inventor, Mitsuhiro Yamaguchi, 31-25 Uchihamacho, Mizuho-ku, Nagoya City Amitek Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A cutter body attached to a rotary shaft, a main blade fixed to the cutter body by brazing, a back blade provided so as to overlap with a surface of the main blade in a cutting direction, and a back blade. 2. A molding cutter comprising: a back blade position adjusting mechanism for adjusting the position of the back blade with respect to the main blade; and a back blade fixing mechanism for fixing the back blade to the cutter body.