KR100290981B1 - Apparatus for Grinding Marking or Sewing Chalk - Google Patents

Abstract

PURPOSE: An apparatus for polishing a chalk for a cutter and needlework is provided to polish preferably the chalk by one operation only and to clean a polished dust while polishing of the chalk. CONSTITUTION: An apparatus for polishing a chalk comprises a housing(1) for receiving a pair of polishing roller(5,5'), a left side and a right side covers(2) assembled to the housing for fixing the pair of polishing roller, a polishing unit having a plurality of polishing blade and a polished dust cleaning unit. The chalk polishing apparatus comprises an attachable and detachable dust drawer(4) for collecting a chalk dust mounted at a lower portion of the polishing roller. A diameter of the polishing blade is about 40 mm, and an interval thereof is 1-2 mm. The intervals between the polishing rollers(5, 5') is 0.5 mm, and the polishing rollers(5, 5') are rotatable each other.

Description

Choke Grinders for Cutting and Sewing {Apparatus for Grinding Marking or Sewing Chalk}

Field of invention

FIELD OF THE INVENTION The present invention relates to a grinder for grinding chokes used when cutting or sewing fabrics. More specifically, the present invention is to sharpen the cutting and sewing choke easily by only one operation, and consists of a pair of polishing rolls, each of which comprises a polishing portion consisting of a plurality of polishing disks and a plurality of dust cleaning means. A choke grinder having a washing portion is provided.

Background of the Invention

In the case of cutting the fabric or sewing the cut fabric, a cut or seam line shall be indicated on the fabric. To represent these cuts and seams, flat chokes are used. The choke is flat as shown in Fig. 5, but the center is slightly blocky and sharp toward the edges. This edge is used to draw a cut or seam on the fabric. However, this choke is made of abrasion-resistant materials such as gypsum or paraffin, and if used over time, the edges will be blunt. This blunt corner should be sharpened by various means. This is because when the sharp choke is used, the display line becomes thick and the precision of cutting or sewing cannot be determined.

Until now, tools such as sandpaper, knives, or brushes have been sharply used to sharpen the edges of blunt chokes. However, this conventional work consumes a lot of time for the worker, and also has some limitations in sharpening and polishing. Moreover, the conventional grinder which uses a brush has a problem that the choke wear surface is not good and wear amount is too large. If the amount of wear is excessive, a large amount of choke must be used, thereby increasing the production cost.

The present inventors have solved the problems of the conventional polishing method or the polishing machine as described above and have developed a polishing machine capable of satisfactorily polishing the choke with only one operation.

An object of the present invention is to provide a cutting and sewing choke grinder capable of satisfactorily polishing chokes in one operation.

Another object of the present invention is to provide a choke grinder capable of grinding the cutting and sewing chokes in one operation, and simultaneously cleaning the polished dust.

It is still another object of the present invention to provide a choke grinder which can bring about a clean working environment by collecting and discarding the polished choke dust.

The above and other objects of the present invention can be achieved by the present invention described below. Hereinafter, the content of the present invention will be described in detail.

1 is a schematic perspective view of a cutting and sewing chalk grinder of the present invention.

Fig. 2 is an exploded perspective view in which one side of the choke grinder of the present invention is disassembled.

3 is a schematic exploded perspective view of a polishing roll of the choke grinder of the present invention.

Fig. 4 is a sectional view showing the schematic shape of the grinding blade of the choke grinder of the present invention.

5 is a schematic perspective view of a conventional cutting and sewing choke.

6 is a schematic side cross-sectional view of a cutting and sewing choke.

* Brief description of the major symbols in the drawings *

1: housing 2: right cover

3: left cover 4: dust drawer

5, 5 ': polishing roll 10: polishing blade

11: Dust cleaning means 12: Polishing roll shaft hole

13: extension shaft 14: fixing bolt

20: choke 21: choke corners

22: polishing surface

The choke grinder according to the present invention includes a housing 1 for accommodating a pair of polishing rolls 5, 5 ', left and right covers 2, 3 assembled to the housing and for fixing a pair of polishing rolls, and a plurality of It is characterized in that it consists of a pair of polishing rolls 5, 5 'having a polishing portion formed with a polishing portion 10 and a washing portion composed of a plurality of dust washing means 11. In the choke grinder of the present invention, a dust drawer 4 for collecting choke dust is installed on the lower part of the polishing roll.

The diameter of the polishing blades 10 of the polishing rolls 5, 5 'is about 40 mm and the interval is in the range of 1-2 mm. About 30-50 grinding blades 10 are formed in a grinding | polishing part. The washing part of the polishing roll first inserts two to three dust washing means 11 onto the shaft 13. Dust cleaning means are suitable for sponges, cloth, etc., where the chalk powder can be wiped off well. The polishing rolls 5, 5 'should be installed so as to be free to rotate about the bolt axis on both sides. One side of the choke is held by hand and the edge of the choke to be polished is passed through the polishing section between the polishing rolls 5 and 5 ', followed by the cleaning section consisting of the cleaning dust means 11. The chokes are polished by the disc, and the worn choke powder is collected on the dust drawer 4 at the bottom, and the choke powder adhered to the wear surface of the choke is wiped by the cleaning dust means 11.

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

1 is a schematic perspective view of a cutting and sewing choke grinder of the present invention. The choke grinder of the present invention is installed such that a pair of polishing rolls 5 and 5 'are fixed inside the housing 1, and each polishing roll includes a plurality of polishing portions and a plurality of polishing blades 10 formed at regular intervals. It consists of a washing unit arranged to contact the two dust cleaning means (11). A pair of abrasive rolls 5 and 5 'may be detachably provided with a dust drawer 4 in which the polished chalk powder is separated and collected.

FIG. 2 is an exploded perspective view showing an exploded side of the choke grinder of the present invention, FIG. 3 is a schematic exploded perspective view of the polishing roll, and FIG. 4 is a sectional view showing a schematic shape of the polishing blade 10.

The pair of polishing rolls 5, 5 'is assembled with the left and right covers 2, 3 by the shaft fixing bolts 14, and the left and right covers are assembled with the housing 1 again. The polishing roll has a structure for forming the polishing portion and the washing portion, the polishing portion is formed on the surface of the polishing rolls 5, 5 'a plurality of circular polishing blades 10 at intervals of 1 to 2 mm, polishing blade 10 The height of is also preferably in the range of 1 to 2 mm. It is suitable for the polishing blade 10 having the same slope as the saw blade to polish the choke, which can be easily implemented by those skilled in the art. The polishing blade 10 formed on the polishing rolls 5 and 5 'is preferably in the range of about 30 to 50, but is not necessarily limited thereto.

The cleaning part is a part for wiping off the powder of the chalk that has been polished in the polishing part. The cleaning part of the polishing roll properly inserts the dust cleaning means 11 on the extension shaft 13. Dust cleaning means is preferably composed of a sponge or cloth so that the chalk powder can be wiped off well. The dust washing means 11 has the same diameter as the abrasive blade 10 but the thickness can be freely selected within the range of 5 to 10 mm.

The interval between the polishing roll 5 and the polishing roll 5 'is preferably maintained at about 0.5 mm. This is to allow the polishing rolls to rotate freely about the axis of each other and the choke powder can escape downward. In order to rotate the polishing rolls 5 and 5 'freely from each other, the fixing bolts 14 are assembled to the left and right covers 2 and 3, respectively, and inserted into the shaft holes 12 of the polishing rolls 5 and 5'. State must be achieved. In other words, the shaft holes 12 need not be formed with a thread and only support the polishing rolls 5 and 5 'to rotate while the fixing bolts 14 are inserted. The diameter of the polishing blade of the polishing roll is preferably 40 mm but may be larger or smaller than this. When the diameter of the polishing blade is smaller than 40 mm, the valleys formed by the polishing rolls 5 and 5 'are lowered and the choke is polished at an obtuse angle. In this case, however, there is an advantage that even small pieces of chalk can be polished. When the diameter of the polishing blade is larger than 40 mm, the valleys formed by the polishing rolls 5 and 5 'are deepened, and the choke is polished at an acute angle. In this case, however, it is difficult to grind small pieces of chalk. Therefore, the diameter of a grinding | polishing blade can be changed suitably according to each use.

5 is a schematic perspective view of one kind of choke 20 used in the cutting and sewing process. The choke 20 is slightly bulging in the center and the edge 21 forms a sharp shape. This edge is used to draw a mark on the fabric. If the edge 21 is blunt by continuously using the choke, hold the center of the choke 20 by hand and pass it through the valleys formed by the polishing roll of the polishing machine of the present invention with a slight force, and then continue to the washing part. Let's do it. In this way, the choke can be polished. Fig. 6 is a side sectional view of the choke, in which both polishing surfaces 22 are polished by the polishing blades 10 of the pair of polishing rolls 5 and 5 'when passed through the polishing machine of the present invention.

If the chalk powder is accumulated in the dust drawer 4 by continuing to use the polishing machine, the dust drawer 4 can be removed to remove the dust. The grinding machine of the present invention can keep the surrounding environment clean by collecting choke dust in one place.

The choke grinder according to the present invention is capable of satisfactorily polishing the choke in one operation, washing the polished dust at the same time as polishing, and collecting and discarding the polished chalk dust to bring a clean working environment. It has an effect that can be provided.

Simple modifications and variations of the present invention fall within the protection scope of the present invention, and the specific protection scope of the present invention will be apparent from the appended claims.

Claims (5)

A housing 1 for accommodating a pair of polishing rolls 5, 5 '; Left and right covers (2, 3) assembled to the housing and for fixing a pair of polishing rolls; And A pair of polishing rolls 5, 5 'having a polishing portion formed with a plurality of polishing blades 10 and a washing portion composed of a plurality of dust washing means 11; Choke grinder for cutting and sewing, characterized in that consisting of. A polishing blade according to claim 1, wherein the polishing blade of the polishing roll has a diameter of about 40 mm and an interval of 1 to 2 mm, and a distance between the polishing roll 5 and the polishing roll 5 'is about 0.5 mm. Cutting and sewing choke grinder, characterized in that the polishing roll (5, 5 ') is free to rotate with each other. The choke grinder for cutting and sewing according to claim 1, wherein the washing part is formed by inserting two to three dust washing means (11) on the extension shaft (13). 4. The choke grinder for cutting and sewing according to claim 3, wherein the dust cleaning means is made of sponge or cloth. 2. The choke grinder for cutting and sewing according to claim 1, further comprising a dust drawer (4) detachably installed to collect chalk dust under the pair of polishing rolls.