JP2008284665A - Tip saw - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem wherein the tip of a saw blade is prevented from being covered with paper powder when the edge of the saw blade tip is inclined rearward relative to the rotational direction of the tip saw in cutting paper or corrugated cardboard paper, but, the cutting force of the tip saw works in a direction of pushing back a cutting object, and the force for pushing in the object is required, causing a burden to an operator. <P>SOLUTION: The edge of the saw blade tip 5 of the tip saw 1 is inclined forward in the rotational direction of the tip saw to pull in the cutting object, and the cutting edge of the saw blade tip is sharpened to prevent the occurrence of chips or paper powder. Thus, the tips of the teeth are prevented from being covered with the chips or paper powder, and the force for pushing in the object is reduced and the burden on the operator is reduced. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a chip saw that cuts relatively thick paper, corrugated paper, and the like, and is intended to reduce cutting resistance by reducing chips and paper dust generated when cutting the corrugated paper. About.

  In recent years, there has been a demand for efficient cutting of relatively thick paper and corrugated paper, and in order to meet this demand, a relatively thick paper with a general wood cutting tip saw or band saw has been tested. When cutting cardboard paper, a large amount of chips and paper dust are generated due to the cutting and adhere to the cut object, and the chips are covered on the tooth tip of the saw blade like a cap, and as a result, the chips are removed. As a result, a cutting phenomenon occurs in which the cutting object tends to be shredded without being cut by the saw blade, and the cutting surface of the cutting object becomes rough and rough, and the cutting resistance is reduced. There are problems such as growing.

On the other hand, a paper-specific chip saw for cutting a corrugated cardboard laminated material has also been proposed, but the paper-specific chip saw generates, for example, paper dust by making the cutting edge surface of the blade body an acute angle as shown in Patent Document 1, for example. The cutting edge of the blade body is prevented from covering the cutting edge by tilting the cutting edge ridge, which becomes the edge, to the back, front, back, and height, with respect to the rotation direction. Is tilted backward with respect to the rotation direction, so the cutting resistance is large during cutting, and the force of the tip saw works in the direction to push back the work, which requires work to push the work to counter this. In addition to increasing the burden on the operator, there are disadvantages such as extra power at the end of cutting.
Japanese Patent No. 3145657

  In order to solve the problem of increasing cutting resistance as exemplified in Patent Document 1, when cutting paper or cardboard with a tip saw, if the saw blade is tilted forward in the rotation direction, the force of the tip saw in the direction of drawing the cut object Although cutting force can be reduced and the cut object can be pressed lightly, it has been found by cutting experiments that, on the other hand, there is a problem that the cutting edge of the saw tooth is covered with cutting chips and paper powder.

  The present invention is characterized in that the edge of the tip saw is tilted forward in the rotational direction, and the tip having a sharp notch is mounted integrally with the saw blade of the saw plate. To this end, first, a saw blade tip mounting receiving surface that can be mounted in an inclined posture in which the blade edge of the saw blade tip is inclined forward in the rotation direction of the endless saw plate on a plurality of saw tooth mounting portions formed on the endless saw plate. In a saw with a saw blade tip mounted in a saw blade tip insertion groove that can stop the rotational moment during cutting, the blade tip edge of the saw blade tip has a knife-like ridge line tooth surface and a sharp tip on its tip The opposite surface has a receiving surface for mounting the saw blade tip, and a fitting groove that can be fitted into the saw tooth is formed, and a chip for holding and fixing the saw plate by the joining pieces on both sides of the fitting groove is provided. It is characterized by being attached, and it cuts at the tip of the sawtooth. There is an advantage to prevent the chips and paper dust covers with.

  Second, the blade edge protrudes in the cutting direction toward the rotation direction of the endless saw plate, or the saw blade is locked to the lower portion of the blade edge of the saw blade chip with respect to the saw blade engaging portion that receives the saw blade chip. This is characterized in that a chip having a recessed squeezed portion that can be integrally combined with the cutting edge and the blade edge is mounted, and has an advantage that it is possible to prevent chips and paper dust from being caught.

  Thirdly, the mounting groove formed in the sawtooth mounting portion of the endless saw plate is formed to have a concave space in which the adhesive can be collected when the saw blade tip is mounted using the adhesive. It has the advantage that the saw blade tip can be prevented from falling off due to the centrifugal force applied to the saw blade tip when the circular saw is rotated.

  The chip saw of the present invention has the above-described solution and the specific advantages associated therewith, and suppresses almost all chips and paper dust generated when cutting relatively thick paper or corrugated paper, and reduces the teeth of the saw blade. There is an advantage that the cut object can be lightly pressed by reducing cutting resistance without first being covered with chips and paper powder accompanying cutting.

  The sawtooth 3 portion of the endless saw plate 2 is processed by grinding a sawtooth tip mounting portion 8, a sawtooth locking portion 11 for receiving the sawtooth tip, and a mounting groove 16 formed in the sawtooth mounting portion. On the other hand, by adopting a metal powder injection molding method (MIM molding method) for powder high-speed steel, a sharp notch 6 having a sharp tip and a notched recess 13 below the cutting edge 15 and a cutting edge 15 are provided. A saw blade tip 5 having hardness and toughness is manufactured by forming the fitting groove 9 into an integrated shape on the opposite surface and sintering and heat-treating it. Thereafter, the fitting groove 9 is inserted and fitted into the attachment portion 8 of the saw tooth 3 so that the saw blade tip 5 is integrated.

  FIG. 1 is a view in which a saw blade tip 5 is inserted and fitted into a band saw tip saw 1.

  FIG. 2 is a view showing a main part of the endless saw plate 2, and a plurality of sawtooth 3 pitch intervals S are 35 mm on one side edge of the endless saw plate 2 having a width U of 50 mm and a thickness Q of 0.6 mm. After being punched and formed by a press machine, the mounting portion 8 for mounting the saw blade tip 5 was tilted forward by a γ angle of 20 degrees toward the front side in the rotational direction of the endless plate 2 (left arrow direction in FIG. 1). A saw receiving surface 4 having a height A of 4 mm in an inclined posture, a locking portion 11 having a width D of 0.8 mm, and a mounting groove 16 having a depth B of 1.8 mm and a groove width C of 1 mm. Grind.

  The saw blade tip 5 shown in FIGS. 3, 4 and 5 has a vertical edge H1 of 5 mm, a longitudinal width W1 of 4 mm, and a thickness T1 of 1 mm. A left and right tooth-like tooth surface 7 of 30 degrees and a sharp cutting edge 6 having a sharp tip with a tip angle α of 60 degrees are formed, and a length L is 0.8 mm and a height below. A recess 13 having a recess H2 of 1.5 mm is formed, and a depth W2 formed by the both-side joining pieces 10 having a thickness of 0.2 mm on the opposite surface of the blade edge 15 is 1.5 mm. The groove width T2 is formed to be the fitting groove 9 slightly narrower than the thickness Q of the saw plate 2. Although the size of the saw blade tip 5 is very small as described above, the cutting performance for cutting a cut object over a long period of time and the strength and toughness that can withstand excessive cutting resistance are required. The shape is molded by a metal powder injection molding method (MIM molding method) using powder high-speed steel having a particle size of 10 to 40 microns as a raw material.

  Thereafter, the saw blade tip 5 is sintered, quenched and tempered to have hardness and toughness suitable for corrugated paper cutting. The shape is appropriately set according to cutting conditions.

  The inner surface of the fitting groove 9 of the saw blade tip 5 extends along the receiving surface 4 for mounting the saw blade chip 5 on the mounting portion 8 obtained by processing the saw blade chip 5 obtained as described above into the saw tooth 3 of the saw plate 2. As shown, the receiving surface 4 for mounting the saw blade tip 5 is enclosed and inserted into the saw blade, and when further inserted using a dedicated insertion tool, the lower portion 12 of the saw blade tip 5 fits into the mounting groove 16 and is locked to the bottom surface of the hook portion 13. The upper surface of the part 11 is in contact with the saw blade 3 by the joining piece 10 of the saw blade chip 5, and the chip is integrated with the saw tooth 3 and fixed.

  When cutting the corrugated paper with the band saw tip saw 1, the saw blade tip 5 is inclined in a forward tilt posture with a γ angle of 20 degrees in the rotational direction, so that the cutting edge 6 first enters the upper surface of the corrugated paper, Subsequently, the cutting edge 15 is torn, and then both the blade surfaces 7 are opened while crushing and shaping the cutting surface of the corrugated paper.

The engaging portion 11 of the saw tooth 3 is in contact with the hooking portion 13 below the saw blade tip 5, but the front end edge of the engaging portion 11 is positioned on the lower extension line of the front end ridge line of the blade edge 15. By being mounted so as to be integrated, it is possible to prevent the locking portion 11 from being caught by a piece of corrugated cardboard paper from which the cutting edge 15 of the saw blade tip 5 has been torn.
In addition, you may comprise so that the front end ridgeline of the blade edge | tip edge 15 may protrude a little in the cutting direction which goes to the rotation direction of an endless saw board with respect to the serration part 11 which receives the saw blade chip | tip 5. FIG. If it does in this way, the front-end edge of the latching | locking part 11 will evacuate back rather than on the downward extension line | wire of the front-end ridgeline of the blade edge | tip edge 15, and the catch of the corrugated cardboard chip can be prevented.

  Since the above phenomenon is continuously performed, it is possible to reduce the friction of the saw plate 2 with the cutting surface of the corrugated paper, and the metal plate of the saw plate 2 due to frictional heat is prevented to cut smoothly.

  The angle γ of the saw-tooth 3 receiving surface 4 is the same as the mounting angle of the saw blade tip 5, and the cutting edge 15 is inclined forward by 20 degrees in the rotation direction of the tip saw 1 so that the corrugated paper is drawn in during cutting. It is possible to reduce the labor of the operator by adding force.

  However, if the posture angle of the forward tilt is too large, the cutting edge 6 of the saw blade tip 5 will tear the corrugated paper, and the torn chips and paper dust will cover the cutting edge 6 like a hat, resulting in sharpness. The cutting surface of corrugated paper becomes worse and the cutting noise becomes louder.

  When the angle of the cut surface after cutting is sharp, such as when cutting cardboard paper or the like, the operator often gets injured at this portion, but the tip angle α of the cutting edge 6 of the saw blade tip 5 When the angle is set to 60 degrees, the upper side of the cut surface of the corrugated cardboard is crushed somewhat, and the corner of the cut surface after cutting is appropriately rounded, so that an accident such as an operator's finger being cut can be prevented.

  Further, if β of the blade edge angle 14 of the saw blade tip 5 is larger than 30 degrees, the force with which the two blade surfaces 7 crush the cutting surface of the corrugated paper becomes large, and the force to push the corrugated paper becomes necessary, which increases the burden on the operator. In addition, since the thickness T1 of the saw blade tip 5 increases proportionally as β of the blade edge angle 14 increases, the width that allows the double blade surface 7 to pass through the thickness T1 of the saw blade tip 5 when cutting thick cardboard paper. It becomes difficult to push open the cutting surface. Conversely, if β of the blade edge angle 14 is made smaller than 30 degrees, the front / rear width W1 of the saw blade tip 5 is lengthened, the strength of the saw blade tip 5 joining piece 10 is reduced, and the wear of the cutting edge 6 is accelerated, resulting in durability. Decreases.

  When cutting corrugated paper or the like with the band saw tip saw 1, the rotational direction of the tip saw 1 is constant and the cutting force acts in the direction of pushing the saw blade tip 5 into the mounting groove 16 of the saw blade 3, and the rotational moment applied to the tip of the saw blade tip 5 Since it is received by the locking portion 11, the saw blade tip 5 does not fall off.

  As the pitch interval S of the saw blades 3 of the band saw tip saw 1 becomes narrower, a larger number of saw blade tips 5 are required and the cost becomes higher, and the work time for mounting the saw blade tip 5 also becomes longer. There is almost no change. However, if the width is larger than this, the cutting surface is deteriorated and the resistance applied to the saw blade tip 5 is increased, and the saw blade 3 may be damaged.

  The circular saw tip saw 1 shown in FIG. 6 is a side view in which the saw blade tip 5 is inserted and fitted into a circular saw.

  A circular saw having a thickness of 2 mm and a diameter F of 255 mm is thinly cut from the outer peripheral side toward the center to a width E of 60 mm so that the thickness Q is uniformly 0.6 mm from both sides.

  7 is mounted on the outer periphery of the circular saw shown in FIG. 7 with a saw blade 3 having a pitch interval S of 36 mm and a saw blade tip 5 inclined forward by a γ angle of 20 degrees in the rotational direction with respect to the diameter line K at the mounting portion 8. The receiving surface 4 and the locking portion 11 having a width D of 0.8 mm, the mounting groove 16 having a depth B of 1.8 mm, and a groove width C of 1 mm are processed by a laser cutting machine.

The saw blade tip 5 having the shape described in the band saw tip saw 1 is inserted and fitted into the circular saw in the same manner as the band saw, and the saw blade tip 5 cannot be removed unless it is struck with a hammer or the like in the disengagement direction. A concave space formed with a semicircular adhesive at the bottom of the mounting groove 16 to prevent the saw blade tip 5 from being accidentally detached due to the centrifugal force generated when the circular saw rotates. The saw blade tip 5 lower part 12 can be fixed to the circular saw with an adhesive.
The adhesive in this case can be performed after the saw blade chip 5 is inserted and fitted, and the amount of the adhesive in the concave space 17 is reduced and the adhesive is stored in the space 17. Can be made easier.

  When cutting paper or cardboard with a woodworking chip saw, a large amount of chips and paper dust is generated. Using a knife-shaped tip saw reduces the generation of chips and paper dust and improves the cutting work environment. In addition, it is possible to prevent chips and paper dust from being mixed into the cut paper and corrugated paper.

  Since the edge of the saw blade tip is tilted forward in the direction of rotation of the tip saw, a force is exerted in the direction in which the chip saw draws a cut material such as paper or corrugated paper, thereby reducing the labor of the operator.

  In addition, since the saw blade tip can be used in the same shape for both the band saw and the circular saw, there is an advantage that the saw blade tip can be mass-produced and the price of the saw blade tip can be reduced.

It is a perspective view of a band saw chip saw. It is a perspective view of a band sawtooth. It is a perspective view of a saw blade tip. It is a side view of a saw blade tip. It is a top view of a saw blade tip. It is a side view of a circular saw chip saw. It is a side enlarged view of a circular saw chip saw.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tip saw 2 Saw plate 3 Saw tooth 4 Receiving surface 5 Saw blade tip 6 Cutting edge 7 Tooth surface 8 Mounting part 9 Fitting groove 10 Joining piece 11 Locking part 12 Lower part 13 Clamping part 14 Edge angle 15 Edge 16 Mounting groove 17 Space

Claims (3)

  A saw blade tip mounting receiving surface that can be mounted in an inclined posture in which the blade edge of the saw blade tip is inclined forward to the front side in the rotation direction of the endless saw plate on the attachment portion of a plurality of saw teeth formed on the endless saw plate, In a saw with a saw blade tip mounted in a mounting groove for saw blade tip insertion that can stop the rotational moment, the edge of the saw blade tip has a knife-like ridge line tooth surface and a sharp tip at its tip, On the opposite side, a receiving groove for mounting the saw blade tip is included, a fitting groove that can be fitted into the saw tooth is formed, and a chip that holds and fixes the saw plate with the joining pieces on both sides of the fitting groove is attached. A featured chip saw.   The blade edge protrudes in the cutting direction toward the rotation direction of the endless saw plate, or the saw blade engagement portion and the blade edge at the lower portion of the blade edge of the saw blade tip. 2. A chip saw according to claim 1, wherein a chip having a recessed hook-in part which can be combined integrally is mounted.   2. The mounting groove formed in the sawtooth mounting portion of the endless saw plate is formed so as to have a concave space in which the adhesive can be stored when the chip is mounted using the adhesive. And the tip saw according to 2.

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