JPH09174397A - Edge sharpener of scissors - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily sharpen an edge of scissors and to use it without acquiring special technique. SOLUTION: A scissors holding tool 20 is supported with a machine stand 1 on the upper side of a freely rotatable polishing plate 5, and is installed in a free end part of a support mechanism formed by combining two sets of four- node links capable of freely making parallel motion, and either length of joint parts of suspending likes 16 and 16' of a link mechanism using its scissors holding tool 20 as a signal node or these suspecting links 16 and 16' and this scissors holding tool 20 is changed. Therefore, a contact condition of an edge line of a work object scissors piece held by the scissors holding tool 20 and the polishing plate 5 can be set in a desired condition. Therefore, an edge can be rightly sharpened only by moving its work object scissors piece in the outer peripheral direction from the rotational center of the polishing plate 5 by pressing it against a polishing plate surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scissor blade sharpening device capable of accurately sharpening a scissors blade with a simple operation.

[0002]

2. Description of the Related Art Conventionally, scissors used as an instrument for hairdressing are required to have sharper blades than scissors generally used for daily necessities. Therefore, it is necessary to sharpen and use the blade of the scissors. However, the scissors have a structure that can be used by combining two blades instead of one blade like general blades, and moreover, when the two blades intersect, the target object (here, hair) is used. In order to function as a cutting tool, the back of the blade has a shallow concave curved surface and is curved in a gentle bow over the entire length of the blade so that there is slight line contact at the position where the cutting edges intersect. . Therefore, it is difficult to sharpen the blade of the scissors like other blades.
Because of such a structure, scissors sharpening is generally entrusted to specialists. However, in barbers and beauty salons that use a lot of scissors, it was necessary to prepare a large number of scissors because the sharpness of the blade was used to sharpen the blade, which is not only convenient but also difficult to handle. Inconvenience occurs.

Under such circumstances, attempts have been made to put into practical use an instrument capable of sharpening the blade of scissors, even if it is not a specialized trader. The prior art is provided with a holder for supporting one piece of scissors to be sharpened on the upper side of a grindstone rotating in a certain direction so that a cutting edge can contact the grindstone at a predetermined angle. It is configured to sharpen the blade while manually moving a piece of scissors attached to the wheel on a rotating whetstone in the radial direction.

[0004]

In the conventional sharpening of scissors, even if one piece of scissors is held by a holder so that the cutting edge has a predetermined angle, the grindstone of the blade of the scissors to be sharpened thereafter. It was difficult to set and maintain the contact state with respect to the optimum condition, which made it difficult to perform the blade sharpening operation. In short, even if the sharpening angle of the scissors blade with respect to the polishing surface can be set, it is a condition of one point and continuously maintains the same condition, and the scissors blade edge (blade line portion) is continuously equalized. It was very difficult to sharpen under the conditions. Therefore, it has been recognized that sharpening scissors requires skilled techniques and cannot be handled by ordinary ones.

In the present invention, it is intended to solve the above problems and provide a scissor blade sharpening device which can be easily used by sharpening the scissors blade easily without mastering a special technique. To do.

[0006]

Therefore, in order to solve the problems of the prior art, the present invention straddles this circular polishing plate on the upper side of a circular polishing plate which can be rotated forward and backward in a plane by an electric motor. There is a scissor holder that can move forward and backward from the center of rotation with a pair of four-bar links supported at the machine base at a position apart from the polishing plate for parallel movement. Attached to the free end of the supporting mechanism for changing the length of the link that constitutes the parallel movement mechanism, so that the blade of the work scissors supported by the scissor holder and the polishing plate come into contact with each other. The trajectory can be moved according to the warp of the blade of the scissors, so that the scissors can be sharpened easily without requiring skill.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, a free end of a support mechanism in which two pairs of four-bar links in which a scissor holder is supported by a machine base on the upper side of the circular polishing plate which is rotatable and which is freely movable in parallel. Attached to the scissor holder, by changing the length of one of the two hanging links of the link mechanism having the scissor holder as a joint, or the length of the joint between the hanging link and the scissor holder, You can set the contact state between the blade line of the scissors to be held and the polishing plate, and press the scissors to the polishing plate surface to move from the center of rotation of the polishing plate to the outer peripheral direction. It is a structure that allows you to sharpen the blade correctly just by making it.

In the present invention, the supporting mechanism is a parallelogram-shaped swing support link whose base is supported on the machine base side, and the upper two joints of the swing support link are respectively pin-connected and hung down. And two suspension links, the front and rear ends of which are movably pin-coupled to the lower ends of these suspension links so that the scissor holder is laterally coupled and supported, and the spacing between both suspension links is The blade line part of the sharpened scissors piece held by the scissor holder with respect to the rotating polishing plate (hereinafter referred to as the part where the cutting edge is formed, the same applies below) Simply by pressing and moving, the blade can be sharpened in a certain state with a movement according to the shape of the blade line.

Further, a long hole is formed in the scissor holder at a connecting portion between one lower end of the suspending link of the support mechanism and one end of the scissor holder so that the suspending link end and an arbitrary position can be provided at any position. By providing the fixing means capable of setting the connection, it is possible to easily set the blade sharpening condition of the sharpened scissor piece held by the scissor holder.

Further, at any one of the suspension links of the support mechanism and the lateral connection link of the swing support link, the length dimension thereof can be adjusted and pin connection is performed. By doing so, it is possible to set the blade sharpening conditions for the scissors to be sharpened held by the scissor holder. In addition, the blade sharpening condition can be set as described above by making one of the constituent links of the swing support link side adjustable in connection length, if necessary. It is possible.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the scissor blade sharpening device of the present invention will be described below with reference to the drawings. FIG. 1 is a partial sectional view showing an outline of a scissor blade sharpening device according to the present invention. FIG. 2 is a plan view of FIG. FIG. 3 is a side view showing a scissor holder for holding a scissor piece. FIG.
[Fig. 3] is a plan view of a scissor holder. FIG. 5 is a view seen from the right side of FIG.

As shown in these figures, the scissor blade sharpening device according to the present invention comprises a rotating disk-shaped polishing plate 5 (a fine grindstone or a buffing disk, which will be referred to hereinafter as the polishing plate 5). Is mounted on the rotary plate 2 attached to the output shaft 3 ', and a motor 3 with a reducer for rotating substantially horizontally is arranged inside the machine base 1, and the base end is supported on the upper part of the machine base 1. A rocking support link portion 10 composed of four-node links (one side of which supports the base end is fixed to the machine base side) arranged in a parallelogram that can be rocked and moved is disposed. There is. Then, the horizontal connecting link 13 located at the upper part of the swing support link portion 10 and the two suspending links 16 and 16 ′ at each joint have their base ends at the pins 12 and 12, respectively.
The scissor holders 20 are laterally connected to the lower ends of the two suspension links 16 and 16 'by the pins 17 and 17a so as to perform the movement of a parallel ruler as a whole. It is provided.

A motor 3 with a reducer installed inside the machine base 1.
Is arranged such that the polishing plate 5 is rotatably attached to the output shaft 3a protruding upward via the rotary plate 2 while keeping the horizontal position. A switch 6 for switching between forward rotation / reverse rotation start / stop is incorporated in a circuit connecting the motor with speed reducer 3 and a power source.

In the rocking support link portion 10, two rocking links 11 and 11 'which are parallel to each other at a predetermined interval are used as the polishing plate 5.
The base end is supported by the pins 12 and 12 on a part of the upper side of the machine base 1 which is formed as a cover 4 covering the latter half of the upper part of the horizontal part, and the lateral connecting link 13 and the pins 14 and
14 'are connected and formed. Then, two suspension links 16 and 16 'are attached to the front ends of both the swing links 11 and 11' in the swing support link portion 10 in common with the connecting pins 14 and 14 '. . At the lower end of each of these two suspension links 16, 16 ',
The scissor holder 20 having a required length is supported by the pins 17 and 17a.

As shown in FIGS. 3 to 5, the scissor holder 20 has a main piece 21 made of a rectangular member having a required length, and an angle display for fixing the base portion at the front end of the main piece 21. Plate 25
And a scissor piece holder 27 that allows the angle display plate 25 to set and hold the scissor piece 50 at a required angle for sharpening the blade.
27A and.

The main piece 21 of the scissor holder 20 has a pin 17 at the lower end of one of the suspension links 16 'at its rear end.
And a long hole 22 is provided obliquely downward at the front end at an appropriate angle, and a connecting pin 17a is inserted through the long hole 22 to attach the lower end of the other suspension link 16 'to the pin 17a. By being tightened from the outside at a desired position in the elongated hole 22, it can be moved back and forth in cooperation with the swing support links 11 and 11 '. The pin 17a which is inserted into the elongated hole 22 is formed between the blade line portion of the scissors to be sharpened 50 held by the scissor piece holders 27 and 27A described later and the polishing surface 5 '(polishing surface) of the polishing plate 5. It is preferable to provide a step so that the contact angle can be set at a specific position when the optimum contact angle is found.

The angle display plate 25 has a base end portion having the main piece 21.
Is a fan-shaped plate that is fixed orthogonally to the front end face of the base plate and that is drawn with a required radius based on the axial center of the support shaft 24 provided at the lower portion of the main piece 21 at the center of its base end. A plurality of cuts 25a are engraved at an angle of. On the front surface of the angle display plate 25, two scissor piece holders 27, 27 are provided.
As shown in FIG. 5, the base portion A is fixed to the support shaft 24, and the scissor piece holder 27 for sharpening the blade surface holds the scissor piece 50 for sharpening the blade surface and the scissor piece holder 27A for sharpening the back surface of the blade.
Is installed as.

In these scissor piece holders 27 and 27A, a pointer 28 'provided at the tip of an angle indicating piece 28, the base of which is fixedly attached to the support shaft 24, is provided in the angle display notch 25a of the angle display plate 25. By engaging with each other, the blade line portion 51 of the scissors piece 50 to be held can contact the grinding surface 5 ′ of the polishing plate 5 at an angle set. The scissor piece holders 27, 27A are each formed with laterally long notches 27a, 27b at the tips thereof, and the push screw 27d is inserted in the direction orthogonal to the notches 27a (27b). The holder is formed with a required width so that the base of the sharpened scissors piece 50 can be fitted in the notch 27a (27b) and the back side of the blade can be applied to the receiving surface 27e and the front side can be pressed by the push screw 27d and fixed to the holder. Has been done. Scissor piece holder 2 for sharpening the blade surface
7 is used to sharpen the blade surface of the blade line portion 51, and the mounting portion of the push screw 27d is located on the lower side. Also,
The scissor piece holder 27A for sharpening the back of the blade is used to sharpen the back of the blade, and the push screw 27d is positioned above the holding portion.

The support shaft 24 of the scissor piece holders 27, 27A is provided below the main piece 21 with support portions 21a, 21b.
The bases of the scissor piece holders 27, 27A are urged by the coil spring 24a fitted between them so as to be attracted to the main piece 21 side, and the pointer 28 'at the end of the angle indicating piece 28 is always selected on the angle display plate 25. Notch of angle display 2
The angle setting is prevented from changing in association with 5a. Therefore, in order to set the angle of the scissor piece holders 27, 27A, the scissor piece holders 27, 27A are set to the coil spring 2
The pointer 28 'at the end of the angle indicating piece 28 is notched 2 on the angle display plate 25 by pulling it toward the front against the thrust of 4a.
It can be rotationally displaced to another position by removing it from 5a. In addition, the notch 2 of the angle display of the angle display plate 25
In this specific example, 5a is provided with 55 °, 45 °, and 35 ° and a blade back grinding position.

In order to sharpen the scissors by the blade sharpening device of the present embodiment having the above-described structure, first, the polishing plate 5 is used with a grindstone for rough polishing, and the scissors to be sharpened are disassembled into left and right scissor pieces 50. Then, each scissor piece 50 is fixed to the scissor piece holder 27 for sharpening the blade by attaching the base portion so that the back of the blade faces upward and fixing it with the push screw 27d. In this state, the scissors piece holder 27 (27A) is pulled toward the front against the thrust of the coil spring 24a, and in the free state, the pointer 28 'of the angle indicating piece 28 is moved to the angle display plate 25.
Set the blade sharpening angle by fitting it to the position of 35 ° (may be 45 °). The scissors piece 50 to be sharpened can be scissor holder 2 by lifting the grip portion of the base end portion by hand.
0 is lifted together with the suspension links 16 and 16 ′, and at the same time, is moved by the swing support link portion 10 in the direction opposite to the operating side (rear side of the apparatus). Then, the switch 6 is turned on to activate the motor 3 to rotate the polishing plate 5, and the scissor piece holder 27 (2
By roughly pressing the scissor piece 50 supported by 7A) from the blade base side, pulling it forward, and repeatedly pressing lightly, it is possible to rough sharpen at a blade edge angle of 35 °. At this time, the operator simply pushes and pulls the scissor piece 50 against the polishing plate 5 while keeping the state in which the scissor piece 50 is pressed against the polishing plate 5, and the swing support link portion 10 and the two suspension links 16 and 16 'are parallel to each other. The scissor piece 50 held by the scissor holder 20 by exercise can be properly sharpened from the blade edge to the tip without shifting laterally. At this time, the amount of sharpening can be adjusted by adjusting the speed at which the scissors piece 50 is moved.

To finish and sharpen the scissors 50, the polishing plate 5
To a buffing plate for finishing, or by mounting the buffing plate on the polishing plate 5 for rough polishing, and pulling it while the scissor piece 20 is held by the scissor holder 20 as described above. Separate the pointer 28 'of the angle indicating plate 28 from the angle indicating plate 25,
If the sharpening angle is changed to 45 ° (or 55 °) and lifted and retracted as it is, the swing support link portion 10 is pushed back to move the scissor holder 20 toward the central portion of the buff plate and sharpen. Can shift to posture. After that, the blade line portion of the scissor piece 50 held by the scissor holder 20 is sharpened in the same manner as the above-mentioned rough sharpening. It should be noted that, when performing the final sharpening, it is most preferable to displace the angle at which the cutting edge makes contact with the sharpening surface by about 10 ° more than that in the rough grinding so that only the cutting edge is sharpened along the cutting line. In this way, the blade can be sharpened under the same conditions from the tip of the blade line to the base of the blade line. In addition,
This sharpening operation is carried out several times under the same conditions so that the desired blade is sharpened.

If the blade surface is ground in this way, then the scissor piece 50 is attached and fixed to the other scissor holder 27A for the back of the blade in the same manner as above, and the blade surface is sharpened. In the same way, the return caused by sharpening the blade surface is sharpened off and the return blade is removed. When the back of the blade is sharpened, the blade sharpening posture is set by moving and setting the angle indicating plate 28 to the sharpening position of the back of the angle display plate 25. If after the back grinding of the blade,
If a return blade is formed again on the blade surface side, this time, the blade surface is sharpened and removed in the same manner as described above, and when there is no return, the blade sharpening is completed.

As described above, according to the blade sharpening device of the present invention, the swing support link portion 10 and the suspension links 16 and 1 are provided.
If the pressing force for bringing the scissors piece 50 into contact with the surface of the polishing plate 5 (buff plate) is kept constant by the parallel movement with 6 ', the cutting edge can be always sharpened under the same conditions. Therefore, it has become possible to easily carry out the sharpening work of the scissors, which has been conventionally difficult to operate due to the skill required.

The embodiment described above is a so-called straight blade in which the blade line is straight, and in the case of a blade having a shape in which the blade line is curved like a bow, so-called willow blade scissors, it is as simple as described above. The blade cannot be sharpened by simple operation. Therefore, in such a case, in the apparatus, the connecting pin 17a at the lower end of the suspension link 16 'on the front side is moved downward along the elongated hole 22 and fixed. In this case, FIG.
As shown in the schematic diagram of FIG. 2, the distance L between the position of the connecting pin 17 of the rear suspension link 16 in the scissor holder 20 and the position of the moved front connecting pin 17a is determined by the distance between both suspension links 16. , 16 ', the distance L'of the pin connection section between the swing support link 10 and the lateral connection link 11
And L> L '. Then, the sharpened scissor piece 50 attached to the scissor piece holder 27 of the scissor holder 20 as described above.
Means that the locus when the blade line portion 51 from the blade line source to the blade line tip is in contact with the sharpening surface 5 ′ is in the relation of L> L ′ with respect to the parallel movement by the swing support link 10. When the scissor holder 20 is moved in the outer peripheral direction of the polishing plate by displacing the difference by a small amount, the edge of the scissors is gradually displaced so that the edge of the blade rises to form a curve and come into contact with the sharpening surface, resulting in a curve. The blade will be sharpened along the drawn line.

When sharpening the scissors of a willow blade whose curve 51 is curved, the sharpness of the scissor holder 20 can be adjusted by adjusting the scissors of the willow blade. It is preferable to shift and temporarily fix the lower connecting pin 17a of 16 ', and confirm the movement of the blade line portion 51 on the polishing plate 5 to determine the optimum position before the polishing operation. Therefore, when sharpening a plurality of willow blade scissors finished in the same curve, if the position set as described above is kept, the scissor piece 50 for the scissor piece holder 27 will be used for the subsequent work.
You can easily sharpen the blades in sequence while maintaining certain conditions simply by attaching and detaching.

According to the present invention, the scissor piece 50 held by the scissor holder 20 is held by the scissor holder 20 as described above, particularly in the case of willow blade scissors, when the blade sharpening operation is performed. In order to allow movement along the blade line, a similar change can be made not only at the position of the scissors holder 20 but also at other links by changing the length thereof.

For example, if an operation is performed such that the length of the suspension link 16 'on the front side is slightly shortened, the same displacement as described above can be performed. In addition, the connection interval between the two suspension links 16 and 16 'in the scissor holder 20 is lengthened, or the interval between the lower end support parts of the swing links 11 and 11' in the swing support link part 10 is changed, Is a horizontal connecting link 13 on the upper part of the swing support link portion 10.
The blade line portion 5 of the sharpened scissors piece 50 held by the scissor holder 20 by changing the distance between the connecting pins 12, 12 'of
It is possible to displace the contact locus between 1 and the sharpening surface 5'and sharpen. For adjusting the length, for example, a method of using a screw can be adopted.

According to the present invention, when the length of one of the two sets of four-bar links forming the support mechanism of the scissor holder is adjusted, the blade line of the scissor piece is curved to sharpen the blade. It is also possible to adjust the number of adjustments to one or more as needed.

[0029]

As described above, the present invention has the following effects. 1) The blade can be sharpened simply by moving the scissors to be ground while holding it in a fixed posture by a support mechanism that applies a parallel link mechanism to the sharpening surface of the polishing plate and pressing it against the sharpening surface. Therefore, scissor sharpening, which has conventionally required skill to sharpen manually, can be carried out without requiring any special technique. 2) Even scissors such as a willow blade that has a curved edge line portion can be sharpened in accordance with the curve without requiring any special technique. 3) When the blade is sharpened, the scissors piece is simply attached to the scissors piece holder and no special operation is required, so that the scissors piece is easy to handle.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing an outline of a scissor blade sharpening device according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a view showing a scissor holder for holding a scissor piece.

FIG. 4 is a plan view of the scissor holder.

5 is a view seen from the right side of FIG.

FIG. 6 is a view showing a mode in which scissors pieces are sharpened.

FIG. 7 is a schematic diagram showing a mechanism for displacing the scissor holder when performing a sharpening operation on a willow blade.

[Signs in the drawings]

 1 Machine Stand 2 Rotating Plate 3 Motor with Reducer 5 Polishing Plate 5 ′ Sharpening Surface 10 Swing Support Link Part 11, 11 ′ Swing Link 12 Connecting Pin 13 Horizontal Connecting Link 16, 16 ′ Suspending Link 17 Connecting Pin 17a This Side Position connecting pin 20 Scissor holder 21 Main piece of scissor holder 22 Long hole 24 Support shaft 25 Angle display plate 27 Scissor piece holder for blade surface sharpening 27A Scissor piece holder for blade back grinding 28 Angle indicator plate 28 'pointer 50 Scissors piece 51 Blade line part

Claims (4)

[Claims] 1. A scissor holder that is movable on the upper side of a circular polishing plate that can be rotated forward and backward in a plane by an electric motor and that can move forward and backward from the center of rotation across the polishing plate. The scissor holder is attached to the free end of the support mechanism that moves in parallel by combining two sets of four-bar links supported at the machine base at a position apart from the polishing plate, and the links that form the support mechanism. By changing the length dimension of the scissors, the contact locus between the blade of the scissors to be held by the scissor holder and the polishing plate can be moved according to the warp of the blade of the scissors. A scissors blade sharpening device. 2. The supporting mechanism is a parallelogram-shaped swing support link whose base is supported on the machine base side, and the upper two joints of the swing support link are pin-connected and hang down. It consists of two suspension links, and the front and rear ends of the suspension links are movably pin-connected to the lower ends of these suspension links so that the scissor holder is laterally connected and supported. The scissor blade sharpening device according to claim 1, wherein the scissor blade sharpening device is variably connected. 3. A long hole is formed in the scissor holder at a connecting portion between one lower end of the suspending link of the support mechanism and one end of the scissor holder so that the hanging link end and an arbitrary position can be provided at an arbitrary position. 3. The fixing device according to claim 1, further comprising a fixing means capable of setting the connection.
The scissors blade sharpening device described in. 4. A length-adjustable pin connection at a connecting portion between any one of the suspension links of the support mechanism and a lateral connection link of the swing support link. Item 2. A scissor blade sharpening device according to Item 1.