JPH0733259U - Comb blade for carding scissors whose bottom is chamfered - Google Patents

Abstract

(57) [Abstract] [Purpose] The shape of the combing blade is improved so that the combing blade for combing scissors can fully exert its function as a comb. Provided is a comb blade for carding scissors, the shape of which can be reliably performed by electric discharge machining, and the bottom of the comb blade is chamfered. [Structure] A comb scissor blade having a comb blade for carding and a normal blade. The direction along the ridge 14 of the blank of the comb blade is x
Direction, the direction perpendicular to the x direction and along the surface 15 is the y direction,
The direction perpendicular to the x-direction and the y-direction is defined as the z-direction, the wire cutter wire is moved relative to the blank between the cutting edge and the root of the tooth in the y-direction, and the wire is located at the root of the tooth. Moving in approximately the x direction,
A surface 1 which is processed in combination with changing the inclination in the yz plane, and which is in contact with the bottom surface 15 and the back surface 16 at an obtuse angle
3a and 13b are formed respectively.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a comb blade for combing scissors in which the bottom of the comb blade is chamfered.

[0002]

[Prior art]

 Carding scissors are used to comb hair, and the combing scissors have one of the blades of the scissors shaped like a comb. FIG. 4 shows a typical carding blade. The problems associated with the conventionally used processing methods will be briefly described by taking such a carding blade as an example. Such blades are made by stacking one or more blanks made of stainless steel plates, and moving a cutter with a thickness corresponding to the space between the combs in the vertical direction to the blank surface. . The portion of the blade peak 4 shown in the figure has a curvature of, for example, 800 mm (hereinafter referred to as 800R), and the blade tip (the line connecting the tips of the teeth of the comb) also has a curvature of the same degree 800R. It is required that the roots of the comb teeth 2, 2 ... 2 be equidistant from the peaks. In the example shown in the figure, there are 40 comb teeth and corresponding valleys, but the tooth lengths (= valley depths) are all different, and if it is to process at one time, prepare 40 types of cutters with slightly different diameters. There is a need. Since the carding scissors are special scissors, they are not in demand as much as general scissors. Preparing a large number of slightly different types of expensive cutters is a great burden. For this reason, household items other than barbers and beauticians do not need to prepare multiple types of cutters by sacrificing their function so that the line that connects the valley bottoms is a straight line that is parallel to the peaks. Some are using a large number.

[0003]

[Problems to be solved by the device]

 The comb blade is required to have a function similar to that of a comb. Therefore, the shape of the bottom of the valley becomes a problem, and if the shape of this part has sharp corners or processing burrs are left, it may damage the hair. If the cross section of the cutter is chamfered, the bottom and the base of the comb can be smoothly connected. However, the front and back of the blade and the joint between the bottom and the bottom are left with corners and burrs. For this reason, so-called polishing for finishing is performed at the end of machining of the valley. However, it is impossible to completely remove the burr, and rather pushes the burr back to the bottom of the valley. For that reason, there is a countermeasure that the final finishing process is slightly chamfered by hand using a diamond file or the like. However, there remains the problem that variations in processing accuracy impair the quality of the finish, which further increases manufacturing costs.

Further, recently, precision machining of a metal material by an electric discharge machine has come to be widely performed, but a machined by this method is a tooth 2 and a tooth 2 as shown in FIGS. 9 and 13. The valley bottom surface 3 has an obtuse angle with respect to the front surface 5, but since the angle sandwiching the ridgeline 3a at the boundary with the back surface 6 is an acute angle, it also has a drawback of damaging the hair. FIG. 9 is an enlarged perspective view of a part of a conventional comb blade 1 manufactured by an electric discharge machine. FIG. 13 is a cross-sectional view of the comb blade of FIG. The object of the present invention is to improve the shape of the combing blade so that the above-mentioned function as a comb can be fully exerted, and to ensure that the shape can be achieved by wire cutting. The purpose of the present invention is to provide comb blades for carding scissors whose bottoms are chamfered.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the comb blade for combing scissors according to the present invention is chamfered at the bottom thereof. A comb blade 10 is obtained by processing a blank having a cutting edge 12, a front surface 15 and a back surface 16 continuous with the ridge and the cutting edge, wherein the direction along the ridge 14 of the blank is the x direction, and the surface 15 is perpendicular to the x direction. It is assumed that the direction along the y-direction is the y-direction, and the direction perpendicular to the x-direction and the y-direction is the z-direction, and the wire of the wire electric discharge machine is relatively to the blank, and the distance between the cutting edge and the root of the tooth is approximately the y-direction. Direction, moving the line substantially in the x direction at the root of the tooth, and changing the inclination in the yz plane, the processed shape of the valley is the surface of the root. 15 and back surface 16 contact with obtuse angle That the surface 13a, a structure which is 13b pixels respectively formed.

[0006]

【Example】

 Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing a part of an embodiment of the present invention together with its processing procedure. FIG. 2 is a plan view of the embodiment of FIG. FIG. 3 is a sectional view taken along line AA of FIG. 1 to 3, reference numerals 12, 12, ... 12 are teeth of a comb blade for carding scissors. 13a, 13a ... 13a are surfaces that continue to the surface 15 at the bottom of the valley between the teeth 12. 13b, 13b ... 13b are the surfaces that follow the back surface 16 at the bottom of the valley between the teeth 12. Reference numerals 17 and 18 show only a set of portions obtained by cutting the portion corresponding to the valley by electric discharge machining.

The comb blade 10 is basically manufactured by cutting a comb-teeth 12 and an adjacent comb-teeth 12 from a stainless steel blank with a wire of an electric discharge machine (hereinafter referred to as a wire). . In this example, a 0.2 mm wire was used. In each figure, the x, y, and z axes correspond to the blank posture for easy description. Both sides of the blank are parallel to the x and y planes, the peak direction is x, the comb direction is the y direction, and the blank thickness direction is z.

When cutting one of the valleys between the teeth 12 and the teeth 12, the wire operation is performed twice in the example of FIG. The first time, as shown in Fig. 1, in the y and z planes, the wire whose upper part inclines in the ridge direction (the posture of the wire in this case is assumed to be W ₁ ) follows the arrow in the figure, and the valley part When moving from the cutting edge side on the right side of the figure to the crest along the y-axis, then moving to the left in the figure in the x direction along the crest, and then moving in the direction away from the crest along the y-axis. The unnecessary portion 17 is cut off.

In the second time, the wire is tilted in the y and z planes with the lower part tilted in the ridge direction (the wire posture in this case is W ₂ ), and the wire is drawn in the same manner as the first time. Moving along the arrow in the first, first along the y-axis, then in the x-direction, and then along the y-axis, the unwanted portion 18 is excised. In this way, a surface 13a that intersects the front surface 15 at an obtuse angle and a surface 13b that intersects the back surface 16 at an obtuse angle are formed on the bottom surface of the valley.

FIG. 5 is an explanatory diagram showing another example of a processing method for obtaining the embodiment of FIG. In FIG. 5, a line segment a indicated by a two-dot chain line₀-B₀Shows the initial position and posture of the wire when cutting one valley. a₁-B₁~ A₉-B₉Represents the position and posture in the middle of the series of operations. a_Ten-B_TenRepresents the final position and posture of the series of motions. Further, 19 is the surplus part of one trough cut out by the wire. Each point c of the surplus part 19₁, C₂, C_Five, C₆, C₈, C₉, D₁, D ₂ , D_Four, D_Five, D₆, D₈, D₉Is the intermediate point a of the wire movement₁, A ₂ , A_Five, A₆, A₈, A₉, B₁, B₂, B_Four, B_Five, B₆, B₈, B₉Respond to.

When one of the valleys is cut off, a series of operations is performed once in the example of FIG. Attitude W₁First, follow the wire of₀-B₀To a₁-B₁Along the y-axis in the peak direction, and then along the peak in the x-direction a₁-B₁To a₂-B₂, Then a along the y-axis₂-B₂To a₃-B₃Move up to. Here, changing the inclination of the wire₃-B₃A_Four-B_Four(Attitude W₁To W₂Conversion to). Then a_Four-B_FourTo a_Five-B_FiveAlong the y-axis in the peak direction, and then along the peak in the x-direction a_Five-B_FiveTo a₆-B₆Go to, then a along the y-axis₆-B ₆ To a₇-B₇Move up to.

Here, it flips and moves again along the y-axis from a ₇ -b ₇ to a ₈ -b ₈ and then along the peak in the x direction from a ₈ -b ₈ to a ₉ -b _9. move, finally along the y-axis is moved from a ₉ -b ₉ until a ₁₀ -b _10. By doing so, it is possible to form the surface 13a that intersects the front surface 15 at an obtuse angle and the surface 13b that intersects the back surface 16 at an obtuse angle on the bottom surface of the valley, as in the case of FIG. In addition to this, various methods can be considered. For example, in the above course of movement of the wire, the posture of the wire is converted from W ₂ to W ₁ next to a ₇ −b ₇ , and then along the y axis via a ₁ −b ₁ to a ₂ −b _2. You may move and return to the final position.

Since the steps before and after the electric discharge machining are substantially the same as the conventional steps, they will be briefly described here. (Step 1) Prepare a stainless steel blank that will be the prototype of the carding blade. (Step 2) The blank 7 is perforated (see FIG. 4). (Step 3) The surface of the blank is subjected to rotary polishing (front and back, peaks, and cutting edge). Of course, manual polishing is also possible. (Step 4) As described above, the groove between the elements of the comb is processed by the automatic machine. (Step 5) Heat treatment (quenching treatment) is performed. Note that the machined blank may be impacted due to distortion after quenching, but there is no problem in strength even if chamfering as described above, and this shape is rather stable. Seems to be doing. (Step 6) Polishing is performed automatically (front and back, peaks, and cutting edges) or manually. Note that there is no room for burr to occur in the machining described above, so manual deburring is not necessary.

The above is an example of the blank processing method for obtaining the embodiment of FIG. 1. However, by applying these methods, various other modified comb blades can be manufactured. An example thereof is shown in FIGS. FIG. 6 shows an example of the comb blade 20 in which the surface 23a in contact with the front surface 25 of the valley bottom and the surface 23b in contact with the back surface 26 (not shown in FIG. 6) are curved surfaces and are obtuse angles with respect to the front surface and the back surface. is there. In FIG. 7, a surface 33c parallel to the ridge 34 is provided at the bottom of the valley, and the surface 33c and the surfaces 33a and 33b forming an obtuse angle with respect to the surface 35 and the back surface 36 (not shown in FIG. 7) are provided. It is an example of a comb blade 30 that is present. In FIG. 8, the valley bottom is a U-shaped curved surface 43c, and the surface 43a in contact with the front surface 45 and the surface 43b in contact with the rear surface 46 (not shown in FIG. 8) are curved surfaces, and It is an example of the comb blade 40 having an obtuse angle with respect to the above. Note that 24 and 44 are the peaks of the comb blades 20 and 40, respectively.

10 to 12 are cross-sectional views of the modified examples of FIGS. 6 to 8. In the conventional comb blades shown in FIGS. 9 and 13, the valley bottom surface 3 between the teeth 2 is oblique and intersects the obverse surface 5 at an obtuse angle, but does not obverse the back surface 6. Since they intersect at an acute angle, the ridgeline 3a easily damages the hair when combing the hair. In comparison with this, as shown in FIGS. 3 and 10 to 12, the valley bottom between the tooth 12 and the tooth 12 (tooth 22 and tooth 22, tooth 32 and tooth 32, tooth 42 and tooth 42) of this embodiment. All of the surfaces 13a, 23a, 33a, 43a contacting the front surface form an obtuse angle with respect to the respective surfaces 15, 25, 35, 45, and the surfaces 13b, 23b, 33b, 43b contacting the back surface are all the back surfaces. , 26, 36, 46, each of which has an obtuse angle, so that the hair is not damaged when the hair is combed. In the examples shown in FIGS. 7 and 11, the surfaces 33a and 33b may have a small width as long as the obtuse angles with respect to the front surface and the back surface are sufficiently large. The same applies to the examples 43a and 43b shown in FIGS. 8 and 12.

[0016]

[Effect of device]

 As described in detail above, the comb blade for combing scissors according to the present invention can be chamfered automatically by a wire cutter by electric discharge machining, and since burr is prevented, hair is damaged during use. Can be solved completely. The machining process is simple and clear, familiar with automatic machining, and the amount of machining can be changed easily.

Various modifications can be made to the embodiment described above in detail within the scope of the present invention. The positional relationship between the tool and the blank is strictly relative, and is not restricted by the movement shown in the embodiment.

[Brief description of drawings]

FIG. 1 is a perspective view showing a part of an embodiment of the present invention together with a processing procedure thereof.

2 is a plan view of the embodiment of FIG. 1. FIG.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a plan view showing a general comb blade for carding scissors.

5 is an explanatory diagram showing another example of the processing method of the embodiment of FIG. 1. FIG.

FIG. 6 is an enlarged perspective view showing a part of another embodiment.

FIG. 7 is an enlarged perspective view showing a part of another embodiment.

FIG. 8 is an enlarged perspective view showing a part of another embodiment.

FIG. 9 is an enlarged perspective view showing a part of a conventional comb blade.

10 is a cross-sectional view of the embodiment of FIG.

11 is a cross-sectional view of the embodiment of FIG.

12 is a cross-sectional view of the embodiment of FIG.

13 is a cross-sectional view of the conventional example of FIG.

[Explanation of symbols]

1, 10, 20, 30, 40 Comb blades 2, 12 Comb teeth 3, 3a, 3b, 13a, 13c, 23a, 23b, 3
3a, 33b, 33c, 43a, 43b, 43c Faces that form the roots of combs 4, 14, 24, 34, 44 Comb peaks 5, 15, 25, 36, 46 Comb surfaces 6, 16, 26, 36, 46 Comb back surface 17, 18, 19 Comb trough removal portion W ₁ , W ₂ Line indicating the posture of the cutting wire

Claims (1)

[Scope of utility model registration request] 1. A comb scissor having a comb blade for carding and a normal blade, wherein the comb blade is a comb blade formed by processing a blank having a ridge, a cutting edge, and a front surface and a back surface in contact with the ridge and the cutting edge. It is assumed that the direction along the ridge of the blank is the x direction, the direction perpendicular to the x direction is the y direction, and the direction perpendicular to the x direction and the y direction is the z direction. Machining a combination of moving a line between the cutting edge and the root of a tooth in the y direction, moving the line in the root of the tooth in the x direction, and changing the inclination in the yz plane. A comb blade for carding scissors in which the bottom of the comb blade is chamfered, characterized in that the shape of the valley is formed in the valley bottom with surfaces that contact the front surface and the back surface at obtuse angles.