File tools

Abstract

To provide a file tool that causes little clogging and can perform cutting in both a forward direction and a reverse direction by alternately arranging forward-direction file teeth in which a cutting edge is directed to the forward direction and reverse-direction file teeth in which the blade edge is directed to the reverse direction.SOLUTION: In a file tool 1, a large number of file teeth are formed on a surface of a metal plate 2, and the file teeth protrude in a serrated shape having a predetermined height, and forward-direction file teeth 3a in which a cutting edge is directed in a forward direction and reverse-direction file teeth 3b in which the cutting edge is directed in a reverse direction are arranged alternately and in parallel with respect to a moving direction of the file tool 1.SELECTED DRAWING: Figure 1

Description

Technical Field

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[0001] The present invention relates to a file tool having a large number of file teeth formed thereon, and more particularly to a file tool suitable for filing soft materials such as wood and resin.

Background Art

[0002] File tools have been conventionally used for shaving the surface of a workpiece such as metal or wood or for chamfering. Generally, a file tool has a large number of fine file teeth formed linearly or in an arc shape on the surface of a base body formed of, for example, a strip steel plate or the like. Most of these file tools are various file tools provided for shaving a metal workpiece. On the other hand, as a file tool for shaving a wooden workpiece, for example, as disclosed in Japanese Utility Model Laid-Open No. 57-181524 (Patent Document 1), a woodworking marking file provided with inclined slanted file teeth in one direction on the front and back surfaces of the file body has been proposed. In addition to the slanted file teeth, file teeth such as double teeth and ghost teeth are generally used as file teeth for woodworking file tools.

[0003] For example, in the case of the file tool disclosed in the above Patent Document 1, since the file teeth are directed in one direction, the cutting and polishing directions are determined to be in one direction, and it can be shaved when pushed in the forward direction and slips when pulled in the backward direction. Therefore, Japanese Patent Application Laid-Open No. 4-152018 (Patent Document 2) forms the file teeth into double teeth that intersect each other, and forms the cutting edges of one of the intersecting file teeth to point in opposite directions to each other so that the workpiece can be polished both when the file tool is pushed and when it is pulled.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

[0005] As shown in Patent Document 1 above, commonly used filing tools are formed with sawtooth-like teeth facing in one direction, which limits the cutting and polishing direction to one, resulting in reduced work efficiency. In particular, when the workpiece is wood or resin, the material is soft and can be easily cut, so working in only one direction halves the work efficiency. On the other hand, the filing tool shown in Patent Document 2 is formed so that the cutting edges of the filing teeth face in opposite directions, allowing for bidirectional cutting. However, because the filing teeth intersect with each other, small rhomboid-shaped recesses are formed at the cutting edges, causing chips to get stuck in the recesses and clog the tool, making subsequent cutting difficult. This significantly reduces the work efficiency of filing.

[0006] The problem that this invention aims to solve is to provide a file tool that is less prone to clogging and can cut in both directions by arranging forward-facing file teeth and reverse-facing file teeth alternately with the cutting edge facing forward. [Means for solving the problem]

[0007] To solve the above problems, the filing tool according to the present invention has a large number of filing teeth formed on the surface of a metal plate, and the filing teeth are formed to protrude in a sawtooth shape having a predetermined height, and the gist of the tool is that forward-facing filing teeth and reverse-facing filing teeth are arranged alternately and parallel to each other in relation to the direction of movement of the filing tool.

[0008] Furthermore, the height of the forward-facing file grooves and the reverse-facing file grooves are made different. doing . [Effects of the Invention]

[0011] According to the present invention, a number of file teeth formed on the surface of a metal plate are formed to protrude in a sawtooth shape with a predetermined height, and by arranging forward-facing file teeth with the cutting edge facing forward and reverse-facing file teeth with the cutting edge facing backward in relation to the direction of movement of the filing tool, the workpiece can be cut both when the filing tool is pushed and when it is pulled, thereby improving the workability of filing. In addition, because the forward-facing and reverse-facing file teeth are arranged in parallel and alternately, the shavings can easily pass between the file teeth and be discharged to the left and right, making clogging less likely to occur.

[0012] Furthermore, by making the height of the file teeth different for forward and reverse movement, when the file tool is moved in the forward direction, rough filing can be done with the taller file teeth, and when it is moved in the reverse direction, finishing filing can be done with the shorter file teeth. Thus, one file tool can perform two different filing methods. [Brief explanation of the drawing]

[0015] [Figure 1] This is a perspective view showing a filing tool according to the present invention. [Figure 2] This is a partially enlarged perspective view showing the file marks formed on a filing tool. [Figure 3] This is a cross-sectional view showing the forward and reverse file marks of a filing tool. [Figure 4] (A), (B), and (C) are process diagrams illustrating the process of forming file marks. [Figure 5] (A) and (B) are explanatory diagrams showing the process of cutting a workpiece using a filing tool. [Figure 6] This is a partial cross-sectional view showing another embodiment of the filing tool according to the present invention. [Figure 7] This is a plan view showing a filing tool with forward-facing and reverse-facing file teeth that are angled. [Figure 8] This is a perspective view showing angled forward and reverse file marks. [Best Mode for Carrying Out the Invention]

[0016] The filing tool has numerous file teeth formed on the surface of a metal plate. These file teeth are formed to protrude in a sawtooth shape with a predetermined height, and are arranged alternately and parallel to each other, with forward-facing file teeth and reverse-facing file teeth facing in the opposite direction relative to the direction of movement of the filing tool. The height of the file teeth in the forward direction and the file teeth in the reverse direction are different. It is.

[0017] The filing tool according to the present invention will be described in detail below with reference to the drawings. Figure 1 shows the filing tool 1, and the metal plate 2 used in this filing tool 1 is made of a metal material that has high hardness and can be machined, such as stainless steel or steel. This metal plate 2 is formed in a rectangle similar to that of a general filing tool, and the thickness of the plate is 0.5 mm to 2.0 mm. Furthermore, a gripping part 1a, shown by a dashed line, which has the same shape as that of a general filing tool, is attached to one end of the filing tool 1 in the longitudinal direction. Note that the gripping part 1a does not need to be attached if the filing tool 1 itself is shaped to be gripped. Numerous file marks 3 are formed on one surface of the metal plate 2.

[0018] As shown in Figures 2 and 3, the file teeth 3 are arranged alternately and parallel on the surface of the metal plate 2, with forward file teeth 3a facing forward F and reverse file teeth 3b facing backward R relative to the direction of movement of the file tool 1. These forward file teeth 3a and reverse file teeth 3b are formed perpendicular to the direction of movement of the file tool 1.

[0019] As shown in Figure 3, the height H1 of the forward file teeth 3a is formed at an appropriate height of approximately 0.2 mm to 0.5 mm from the surface of the metal plate 2. These forward file teeth 3a are formed in a sawtooth shape, with the cutting edge facing the forward direction F, which is shown to the left in the figure. On the other hand, the reverse file teeth 3b are formed at a height H2 that is lower than the height H1 of the forward file teeth 3a, and are formed at an appropriate height of approximately 0.1 mm to 0.4 mm from the surface of the metal plate 2. These reverse file teeth 3b are also formed in a sawtooth shape, with the cutting edge facing the reverse direction R, which is shown to the right in the figure.

[0020] Furthermore, the reverse saw teeth 3b adjacent to the forward saw teeth 3a are spaced apart at an interval of dimension D1. Also, the intervals between each forward saw tooth 3a or each reverse saw tooth 3b are spaced apart at an interval of pitch P. As shown in the figure, although formed as a set in which the reverse saw teeth 3b adjacent to the forward saw teeth 3a are spaced apart by a small interval D2, the intervals between these forward saw teeth 3a and reverse saw teeth 3b may be either equal intervals or unequal intervals.

[0021] Figure 4 shows the process of forming the forward saw teeth 3a and the adjacent reverse saw teeth 3b of the saw tool 1. The metal plate 2 that serves as the base material of the saw tool 1 is selected from metal materials with high hardness such as stainless steel and steel that can be cut. The plate thickness of the metal plate 2 is set to an appropriate plate thickness of 1 mm to 3.0 mm. The metal plate 2 is placed on a processing device not shown. Then, as shown in Figure 4, the forward saw teeth 3a are formed upright at equal intervals by the lifting tool 5.

[0022] The lifting tool 5 has a blade portion 5a formed at the cutting edge on the bottom surface side and perpendicular to the moving direction, and its width is set to the width of the forward saw teeth 3a that form the horny shaving tool 1. Also, this lifting tool 5 is inclined at a predetermined angle θ1 so that the rear end side is higher with respect to one surface of the metal material 1 and is attached to a driving device not shown. This inclination angle θ1 is generally set to 10 degrees to 60 degrees. Also, the angle θ2 between the sliding contact surface 5b of the lifting tool 5 and the moving direction is generally set to 30 degrees to 80 degrees.

[0023] First, as shown in Figure 4(A), after the blade portion 5a of the lifting tool 5 is brought into contact with the position where the forward saw teeth 3a of the metal plate 2 are to be formed, when the lifting tool 5 is caused to penetrate the metal plate 2 in the direction indicated by the arrow at a predetermined angle θ1 by a driving device, the blade portion 5a of the lifting tool 5 bites into one surface of the metal plate 2, and thus the forward saw teeth 3a are formed upright. The height H1 of these forward saw teeth 3a is preferably about 0.1 mm to 0.5 mm.

[0024] Next, the digging tool 5 is returned to its origin position, and the metal plate 2 is advanced to the position where the next forward file groove 3a will be formed. After bringing the digging tool 5 into contact with that position, as shown in Figure 4(B), the digging tool 5 is inserted into the metal plate 2 at a predetermined angle θ1 in the direction indicated by the arrow using a drive device. As a result, the blade portion 5a of the digging tool 5 bites into one side of the metal plate 2, and the next forward file groove 3a is formed at a position spaced apart from the forward file groove 3a formed in Figure 4(A) by the pitch P shown in Figure 3. The two forward file grooves 3a formed in this way are spaced approximately 3 mm to 10 mm apart. Thereafter, by repeating the process of returning the digging tool 5 to its origin and advancing it onto the metal plate 2, a predetermined number of forward file grooves 3a are formed in parallel.

[0025] Subsequently, the metal plate 2, on which numerous forward-facing file marks 3a have been formed, is rotated 180 degrees. Then, between the forward-facing file marks 3a formed by the above-described process, reverse-facing file marks 3b are formed, as shown in Figure 4(C). The process of forming these reverse-facing file marks 3b is the same as the process shown in Figures 4(A) and 4(B) above, but the difference from the forward-facing file marks 3a is the height and orientation.

[0026] Specifically, after bringing the digging tool 5 into contact with the position where the reverse-direction file marks 3b are to be formed, as shown in Figure 4(C), the digging tool 5 is inserted into the metal plate 2 at a predetermined angle θ1 in the direction indicated by the arrow using a drive device. The blade portion 5a of the digging tool 5 bites into the surface of the metal plate 2, and the reverse-direction file marks 3b are formed standing upright between the forward-direction file marks 3a formed as shown in Figure 4(A). These reverse-direction file marks 3b are formed at a predetermined height H2 of approximately 0.1 mm to 0.4 mm from the surface of the metal plate 2, and the direction of the cutting edge of the forward-direction file marks 3b is in the opposite direction to that of the forward-direction file marks 3a. Thereafter, the return of the digging tool 5 to its origin and the advancement of the metal plate 2 are repeated until the length to which the reverse-direction file marks 3b should be formed is reached.

[0027] As described above, the numerous forward-facing file teeth 3a and the numerous reverse-facing file teeth 3b with different cutting edge orientations each have a roughly sawtooth-like cross-section, and both types of file teeth 3a and 3b are arranged alternately and parallel to each other. Furthermore, as shown in the figure, the inclination angle of the side surface that slides against the sliding contact surface 5b of the excavation tool 5 with respect to the surface of the metal plate 2 is formed at an obtuse angle, while the inclination angle of the other side surface is formed at an acute angle.

[0028] When filing with the file tool 1 formed in this manner, it can be used in two ways: rough filing and finish filing. For example, when roughly cutting the workpiece, wood 6, as shown in Figure 5(A), the file tool 1 is pressed against the wood 6 so that the cutting edge of the forward-facing file teeth 3a is facing forward, and moved in the direction of the arrow. At this time, since the cutting edge of the forward-facing file teeth 3a is formed at an acute angle, the forward-facing file teeth 3a bite into the wood 6, allowing for significant cutting. The shavings generated by the forward-facing file teeth 3a are pushed out between the spaced-apart forward-facing file teeth 3a and the spaced-apart reverse-facing file teeth 3b, and are discharged to the left and right of the file tool 1. As a result, clogging is less likely to occur. In this way, when cutting wood 6 with the forward-facing file teeth 3a, the reverse-facing file teeth 3b have their cutting edges facing in the opposite direction, so the wood 6 is not cut. In this way, the wood 6 is cut by a series of sequential forward file marks 3a, as shown by the dashed line.

[0029] Furthermore, when finishing the wood 6, the file tool 1 is pressed against the wood 6 as shown in Figure 5(B), with the cutting edge of the reverse-direction file teeth 3b facing the opposite direction, and moved in the opposite direction of the arrow. Since the reverse-direction file teeth 3b are formed with a lower height H2 than the forward-direction file teeth 3a, the wood 6 is cut in smaller pieces. Immediately after cutting with the reverse-direction file teeth 3b, the forward-direction file teeth 3a arrive. At this time, the cutting edge of the forward-direction file teeth 3a is facing the opposite direction, so the bevel portion of the forward-direction file teeth 3a is pressed against the wood 6. As a result, the surface of the wood 6, which has been cut in small pieces by the reverse-direction file teeth 3b, is formed smoothly. In this way, by moving the file tool 1 in the reverse direction, the surface of the wood 6 is cut in small pieces, and the surface of the wood 6 is formed smoothly by the forward-direction file teeth 3a.

[0030] Thus, when rough filing the wood 6 to be worked on, the filing tool 1 is moved in the forward direction, and when finishing filing is performed, the filing tool 1 is moved in the reverse direction, allowing for two types of filing. On the other hand, when the filing tool 1 is moved back and forth in both the forward and reverse directions, rough filing with forward filing marks 3a and finishing filing with reverse filing marks 3b are repeated alternately, allowing the wood 6 to be cut in a short time. Finally, by performing the finishing process shown in Figure 5(B), the surface can be beautifully finished.

[0031] Figure 6 shows another embodiment of the file tool according to the present invention, in which a number of forward file marks 3a are formed upright on the surface of a metal plate 2, and a reverse file mark 3b is formed protruding between them, with the cutting edge facing in the opposite direction to the forward file marks 3a. The height H1 of the reverse file mark 3b is formed to be the same as the height H1 of the forward file marks 3a. When using a file tool in which the heights of the forward file marks 3a and the reverse file marks 3b are formed to be the same, it is possible to cut, for example, the aforementioned wood 6 even when moving back and forth in the forward and reverse directions, thus enabling cutting with almost twice the efficiency.

[0032] Figures 7 and 8 show yet another embodiment of the filing tool according to the present invention, in which the forward filing teeth 3a and the reverse filing teeth 3b are inclined with respect to the direction of movement of the filing tool. In the aforementioned filing tool 1, the forward filing teeth 3a and the adjacent reverse filing teeth 3b of the filing tool 1 are formed to be perpendicular to the direction of movement. In this case, since the forward filing teeth 3a or the reverse filing teeth 3b move parallel to the direction of the wood fibers of the workpiece 6, they may get caught on the wood fibers 6, requiring a large force.

[0033] Therefore, the filing tool 1 shown in Figure 8 has forward-facing file teeth 3a and reverse-facing file teeth 3b inclined at a predetermined inclination angle θ with respect to the direction of movement. When the workpiece is wood as described above, this inclination angle θ is preferably between 5 and 30 degrees. By inclining the forward-facing file teeth 3a and reverse-facing file teeth 3b in this way, the forward-facing file teeth 3a and reverse-facing file teeth 3b are cut in an inclined state with respect to the direction of the wood fibers 6, so that the wood can be filed with light force without getting caught on the fibers. Note that the filing tool 1 shown in Figure 7 has a metal plate 2 without file teeth 3 as the gripping part, but this gripping part may be the same shape as the filing tool 1 described above.

[0034] In the embodiments described above, wood 6 was used as an example of a workpiece to be filed using the filing tool 1. However, other suitable workpieces include soft materials such as resin. These workpieces can be used with various materials, such as gypsum board and plastics, as long as they are less hard than the filing tool 1 and can be cut.

[0035] Furthermore, although the aforementioned file tool 1 has file marks 3 formed on a flat metal plate 2, in order to accommodate workpieces of various shapes or parts to be cut, it is also possible to deform the metal plate 2, on which at least the file marks 3 are formed, into various shapes, such as bending it into an arc to form a semi-circular shape, bending it into a roughly U-shaped cross-section to form a roughly rectangular prism shape, or bending it at a predetermined angle to form a roughly triangular shape. In addition, the file marks 3 can be formed on both sides of the metal plate 2.

[0036] The present invention, as described above, is not limited to these embodiments and can be modified in various ways without departing from the present invention. In the embodiments described above, a rectangle was used as an example for the shape of the file tool, but it may be formed into any shape such as a square or a circle. Furthermore, the forward and reverse file teeth may be formed by dividing the longitudinal direction of the file tool into two halves, with the direction of the cutting edge of the file teeth differing on the left and right sides, in which case the height of the file teeth may differ on the left and right sides. Moreover, the height of the file teeth may be partially differed. In addition, file teeth may be formed on both the front and back surfaces, and the height or pitch of the file teeth may differ between the front and back surfaces. [Explanation of Symbols]

[0037] 1. File tool 2 metal plate 3 File marks 3a Forward file marks 3b Reverse file teeth 6 Wood (workpiece)

Claims

[Claim 1] A filing tool having numerous file marks formed on the surface of a metal plate, The file features a sawtooth-shaped projection with a predetermined height, and arranged in parallel and alternately with forward-facing file teeth and reverse-facing file teeth facing in the opposite direction to the direction of movement of the file tool, with the heights of the forward-facing file teeth and the reverse-facing file teeth being different.

Images