JPH0472128B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a method for forming a pyrotechnic file member for a lighter using a coil material, and the present invention relates to an improvement in a method for forming a pyrotechnic file member for lighters that uses coil material, and it is possible to reliably feed the coil material during sharpening and to improve the quality of the pyrotechnic file member. The present invention relates to a molding method that ensures that the shaft of an auxiliary gear attached to a member is prevented from slipping.

(Prior art) Instead of the conventional method of forming a pyrotechnic file for a lighter by cold heading using a bar material, a method of forming a pyrotechnic file for a lighter by using coil material and winding it into a coil shape has recently been used. There is.

In this method, a dressing roll that rotates at the same time and a holding roll with a receiving groove for the coil material having a larger diameter than the roll are placed facing each other, and the linear coil material is clamped and dressed between them, and then it is made into a coil shape. The coil material is rolled and shaped, and the coil material is fed by a presser roll with a high circumferential speed, so that the sharpening blade can better bite into the surface of the coil material on the side of the dressing roll, which has a low circumferential speed.

(Problem to be Solved by the Invention) However, since the presser roll, which is one of the rolls described above, has only receiving grooves for the coil material in the circumferential direction on the circumferential surface, the resistance on the sharpening side is large. The circumferential surface caused slips with the coil material, making it impossible for the coil material to be fed smoothly, and the placement of the file marks on the circumferential surface was uneven, resulting in uneven file marks.

Also, when attaching the auxiliary gear to the ignition file,
It is necessary to provide anti-slip irregularities such as knurling on the inner circumferential surface of the coiled file member, and this process also requires a great deal of effort.

The present invention solves the above-mentioned problems, so that the coil material is fed smoothly and the file marks are evenly provided, and at the same time as the sharpening, a slip prevention is provided on the hole surface into which the shaft of the auxiliary gear is inserted. It is an object.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a dressing roll 1 having a dressing blade 1a on the circumferential surface, a dressing roll 1 provided opposite to this roll 1, and a dressing roll 1 having a dressing blade 1a on the peripheral surface. A coil material A is clamped and sharpened by a presser roll 2 having a convex portion 2a, and the coil material A is wrapped around a coil mold 3 having a semicircular cross section and cut into predetermined dimensions. This is a method of forming a file member.

(Function) In the above method, the coil material A that is clamped and pressed between the dressing roll 1 and the presser roll 2 is dressed by the dressing blade 1a of the dressing roll 1 biting into the part of the circumferential surface that is in contact with this dressing roll. is,
The anti-slip protrusion 2a provided on the circumferential surface of the presser roll 2 bites into the other side of this part, and the coil material A is fed out reliably without slipping, and the coil material A is fed out to the side opposite to the file marks of the coil material A. An uneven surface is formed on the circumferential surface to prevent slipping.

Further, the sent-out coil material A is wound around the coil mold 3 so that the uneven surface for preventing slipping is on the inner peripheral side, and is cut into a predetermined size to form a firing file member.

(Example) Hereinafter, an example of the method for forming a firing file member for a lighter according to the present invention will be described.

FIG. 1 shows the configuration of an apparatus used in the above-described molding method, in which 1 is a dressing roll, and a dressing blade 1a is provided on the peripheral surface over the entire circumference. Reference numeral 2 denotes a pressing roll which is provided opposite to the dressing roll 1 and is designed to clamp and press the linear coil material A between its peripheral surface and the peripheral surface of the dressing roll 1, and the peripheral surface is entirely A non-slip protrusion 2a is provided around the circumference.

Further, the presser roll 2 has a larger diameter than the dressing roll 1, is driven at the same rotation as the dressing roll 1, and has a faster surface speed than the dressing roll 1.

Therefore, the linear coil material A held between the dressing roll 1 and the presser roll 2 is dressed on the side that is in contact with the circumferential surface of the dressing roll 1, and the presser roll 2
The convex portion 2a bites into the side in contact with the peripheral surface of the concave portion b.
is provided, and since the surface speed of the presser roll 2 is faster than the surface speed of the sharpening roll 1, the coil material A is fed out by the presser roll 2, and the sharpening blade 1a can better bite into the coil material A. File a
is provided at an acute angle.

In addition, the coil material A sent out by the presser roll 2 tends to stretch on the side where the concave portion b is provided in contact with the presser roll 2 and is likely to curve, so this is prevented by passing through a guide 4 having a linear guide groove.
Next, the coil material A is bent from one end side around the coil mold 3 having a semicircular cross section by bending along the guide 5 having an arcuate guide groove with the installation side of the recess b inside.ゝIt is sent to the other end.

Reference numeral 6 denotes a prismatic cutter having a width approximately equal to the diameter of the coil material A, which is pivoted perpendicularly to the coil mold 3 and rotates to cut the coil material fed into the coil mold 3 along its curved surface 3a. A is the curved surface 3a first
The coil material A is cut by the edge on the side leaving the cutter 6 and the tip 6a of the cutter 6,
The rotational speed of the cutter 6 is adjusted so that the tip 6a of the cutter 6 passes through the end edge and is cut when the coil material A has been wound a predetermined number of times.

In the device configured in this way, the linear coil material A is clamped between the dressing roll 1 and the presser roll 2, and is sent out while carving a file pattern a, and a recess b is formed on the opposite side of the file pattern a. It is formed into a coil shape with the installation surface of the recess b inside, and when it reaches the length of the firing file member, it is cut by the cutter 6, and is pushed out by the subsequent coil material and escapes from the coil mold 3. Then, in the subsequent process, quenching etc. are performed, and the auxiliary gear 7 is attached to the drum 7a of the auxiliary gear 7.
There is no need to provide a knurling or other indentation for fitting the auxiliary gear 7, and the uneven inner circumferential surface on which the recess b is provided bites into the drum 7a by the elastic force of the coil and securely holds the auxiliary gear 7. Can be installed.

(Effects) The method for forming a firing file member for a lighter according to the present invention includes a sharpening roll having a sharpening blade on the circumferential surface and a presser foot provided opposite to the sharpening roll and provided with a non-slip protrusion on the circumferential surface. By roll,
Since the coil material is sharpened by clamping it, the anti-slip convex part bites into the surface of the coil material opposite to the sharpened file marks, and the coil material can be reliably fed without slipping. Therefore, by making the surface speed of the presser roll faster than the surface speed of the sharpening roll, the sharpening blade can bite into the blade better and the file marks can be formed accurately.

In addition, since it is wound around a coil mold with a semicircular cross section to form a coil, the coil material can be cut into predetermined dimensions while continuously forming the coil using the edges of the flat part. Efficient and easy to cut.

In addition, the recesses created on the coil surface by the convex parts of the presser rolls become slip-preventing indentations necessary for integral rotation with the auxiliary gear attached to the firing file member, and the conventional process of knurling etc. is omitted. can.

From the above, it is possible to accurately process the pyrotechnic file member,
In addition, since the process is omitted, an inexpensive firing file member can be provided.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a device showing an embodiment of the present invention, FIG. 2 is a configuration diagram showing a coil-shaped portion of the device from the direction in which the coil material is fed, and FIG. 3 is a molded pyrotechnic file member. FIG. 4 is an exploded perspective view of the firing file, and FIG. 5 is a schematic configuration diagram of another embodiment of the device. A... Coil material, a... File mark, b... Recess, 1...
Sharpening roll, 1a... Sharpening blade, 2... Presser roll, 2a... Convex portion, 3... Coil type, 4, 5... Guide, 6... Cutter, 7... Auxiliary gear.

Claims (1)

[Claims] 1 A dressing roll having a dressing blade on its circumferential surface and a pressing roll provided with a non-slip protrusion on its peripheral surface, which is provided opposite to the dressing roll, clamp and press the coil material to dress it into a semicircular shape. A method for forming an ignition file member for a lighter, which comprises winding it around a coil shape having a shaped cross section and cutting it into predetermined dimensions.