JP2864430B2 - Gear for film feed and its manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a film tape (hereinafter referred to as a film).
The present invention relates to a feed gear and its manufacturing method.

(Prior Art) It is known to obtain a film feed gear by injection molding or metal cutting of a metal casting or synthetic resin.

(Problems to be Solved by the Invention) It is easy to obtain the film feeding gear by injection molding of a metal casting or a synthetic resin if it is a normal product. However, when it comes to extremely high precision film feed gears,
Since it is difficult to obtain by injection molding of a metal casting or a synthetic resin, it has conventionally been obtained by metal cutting.

However, since the film feeding gear is manufactured by mounting the rotation driving gear and the film feeding main body in a superposed state, there are various problems as to what method to use.

According to the present invention, a film feed gear with satisfactory accuracy is obtained by skillfully combining press working and cutting and polishing.

(Means for Solving the Problems) Therefore, according to the present invention, the tooth forming portion 2 is formed by thinly cutting the outer peripheral edge of the other surface of the disk 1 made of mild steel as it is, A driving tooth mounting base portion 3 slightly thicker than the tooth forming portion 2 formed on the inner side of the portion 2 by cutting, and a wall thickness larger than the driving tooth mounting base portion 3 similarly formed on the center portion by cutting. Boss 4, a center hole 5 formed in the center of the boss 4, a film feed dog 6 formed by pressing the tooth forming portion 2, and a driving tooth mounting base 3 by pressing. The film feeding main body A composed of the formed projections 7 parallel to the boss portion 4, the driving teeth 9 formed on the outer periphery by press working, and the boss portion 4 similarly formed by press working are fitted. With a central hole 10
Similarly, the boss portion 4 of the film feeding main body A is formed by the rotation driving gear B having an engagement hole 11 with which the protrusion 7 formed by press working is engaged. A film feed gear obtained by engaging the projection 7 of the film feed main body A with the center hole 10 and the engagement hole 11 of the rotation drive gear B respectively.

Also, one side of the disk 1 made of mild steel is cut as it is, and only the other side is cut by a cutting machine to form a thin tooth forming portion 2 on the outer peripheral edge and a slightly thicker driving tooth mounting portion 3 on the inner side. A thicker boss portion 4 is formed at the center, and a center hole 5 is formed at the center of the boss portion 4. The disc 1 is formed by pressing a film feed tooth 6 to the tooth forming portion 2 by the press working. Tooth mounting base 3
The film feeding main body A is formed by forming projections 7 and 7 respectively parallel to the boss portion 4, and the surface of the film feeding main body A is polished, and the driving teeth 9 are formed on the outer periphery by pressing. A rotation driving gear B having a center hole 10 in which the boss portion 4 is fitted at the center and an engagement hole 11 in which the projection 7 is engaged at an intermediate position. A, the boss portion 4 is inserted into the center hole 10 of the rotation driving gear B, and the projection 7 of the film feeding main body A is inserted into the rotation driving gear B.
Of the rotary drive gear B
And a film feeding gear obtained by arbitrarily deforming 13 a fitting portion between the film feeding gear A and the film feeding main body A.

(Embodiment) An embodiment of the method for producing a film feed gear of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a disk obtained by cutting a mild steel round bar into a predetermined thickness. In addition, the disk 1 is illustrated in order to facilitate understanding, and it may be obtained by mounting a round bar on a lathe and suddenly cutting it.

One side of the disk 1 is cut as it is, and only the other side is cut by a cutting machine to form a thin tooth forming portion 2 on the outer peripheral edge, and a slightly thicker drive is provided inside the thin tooth forming portion 2. A tooth mount 3 is formed, a boss 4 is formed at the center, and a center hole 5 is cut at the center of the boss 4 (see FIGS. 3 and 4).

3 and 4 are set on a press machine, and a film feed tooth 6 is formed on the thin tooth forming section 2 and a projection 7, 7 is formed on the driving tooth mounting base 3 by pressing. I do.

When the film feed teeth 6 and the projections 7 are formed by press working in this way, burrs 8 are formed on the opposite sides. Therefore, deburring is performed by barrel polishing work, and other arbitrary surface polishing finishes are performed. The tooth sending main body A is formed.

The film feeding main body A has a rotation driving gear B
Is attached. The rotary drive gear B is formed by press working. 9 is a tooth formed on the outer periphery of the rotation driving gear B, 10 is a center hole fitted on the outer periphery of the boss portion 4 of the film feeding main body A, and 11 matches the projection 7 of the film feeding main body A. It is an engagement hole.

The rotation driving gear B is superimposed on the driving tooth mounting base 3 of the film feeding main body A, and the center hole 10 of the rotation driving gear B is fitted to the boss 4 of the film feeding main body A, The projection 7 of the film feeding main body A is engaged with the engagement hole 11 of the rotation driving gear B.

The boss 4 and the projection 7 are optionally deformed (caulked) 13 so that the rotation driving gear B does not come off the film feeding main body A.

The combined body of the film feeding main body A and the rotation driving gear B obtained in this way, the film feeding main body A is rotated by rotating the rotation driving gear B, and the synthetic resin film or the papermaking film is converted. Can be sent.

(Effect of the Invention) A known film feed gear can be easily obtained by injection molding of a metal casting or a synthetic resin if it is a normal product. However, when it comes to extremely high precision film feed gears,
Since it is difficult to obtain by injection molding of a metal casting or a synthetic resin, it has conventionally been obtained by metal cutting.

However, since the film feeding gear is manufactured by mounting the rotation driving gear and the film feeding main body in a superposed state, there are various problems as to what method to use.

However, according to the present invention, the tooth forming portion 2 formed by cutting the outer peripheral edge of the other surface of the circular plate 1 made of mild steel thin as it is, and similarly, the inside of the tooth forming portion 2 is formed by cutting. A driving tooth mounting base 3 which is slightly thicker than the tooth forming part 2, a boss part 4 which is also thicker than the driving tooth mounting base 3 similarly formed by cutting at the center, and a boss part. 4
A central hole 5 formed at the center of the film, a film feed tooth 6 formed by pressing the tooth forming portion 2, and a projection parallel to the boss portion 4 formed by pressing the driving tooth mount 3. 7, a driving tooth 9 formed on the outer periphery by press working, and a center hole 10 into which the boss 4 similarly formed by press working is fitted.
And a rotary drive gear B having an engagement hole 11 with which the projection 7 is formed similarly by press working.
The boss portion 4 of the film feeding main body A is in the center hole 10 of the rotation driving gear B, and the projection 7 of the film feeding main body A is in the engagement hole 11 of the rotation driving gear B. The film feed gears obtained by the engagement and the disk 1 made of mild steel are left as they are, and only the other surface is cut by a cutting machine to form a thin tooth forming portion 2 on the outer peripheral edge, and a slight inside thereof. A thicker drive tooth mounting base 3, a thicker boss 4 in the center, and a center hole 5 in the center of the boss 4, respectively.
The disc 1 is formed with a film feed tooth 6 on the tooth forming portion 2 by pressing and a projection 7, 7 parallel to the boss portion 4 on the drive tooth mount 3 by the press forming process to form a film feed main body A. The surface of the film feeding main body A is polished, and the driving teeth 9 are provided on the outer periphery by pressing, the center hole 10 into which the boss 4 is fitted at the center, and the projection is provided at an intermediate position. 7 is formed, and the boss portion 4 of the film feeding main body A is inserted into the center hole 10 of the rotation driving gear B to form the film feeding tooth. The protrusion 7 of the main body A is fitted to and fitted with the engaging hole 11 of the rotation driving gear B, and the fitting portion between the rotation driving gear B and the film feeding main body A is arbitrarily deformed 13 to be obtained. Since the structure is based on the manufacturing method of the film feed gear, b. One side of the disc 1 made of mild steel is left as it is, and only the other side is cut by a cutting machine to form a thin tooth forming portion 2 on the outer peripheral edge.
, A slightly thicker drive tooth mounting base 3 inside, a thicker boss 4 in the center, and a center hole 5 in the center of the boss 4.
Are formed respectively, the tooth forming portion 2, the drive tooth mounting base portion 3, and the boss portion 4 are formed by cutting, so that an accurate product can be obtained.

B. The disc 1 is formed with a film feed tooth 6 on the tooth forming portion 2 by pressing and a projection 7, 7 parallel to the boss portion 4 on the drive tooth mounting base portion 3 by pressing to form a film feed main body A. Since it is formed, the film feed dog 6 and the projections 7, 7 can be easily formed.

C. Since the surface of the film feeding main body A is polished, burrs and the like on the opposite side can be easily removed.

D. A rotary drive gear having a driving tooth 9 formed on the outer periphery thereof by press working, a center hole 10 into which the boss 4 is fitted at the center, and an engaging hole 11 with the projection 7 at an intermediate position. Since B is formed, the rotary drive gear B can be easily obtained.

E. The boss portion 4 of the film feeding main body A is fitted to the center hole 10 of the rotation driving gear B, and the projection 7 of the film feeding main body A is fitted to the engagement hole 11 of the rotation driving gear B. At the same time, the fitting portion between the rotation driving gear B and the film feeding main body A was arbitrarily deformed13, so that a film feeding gear which could not be easily obtained conventionally can be easily obtained, and the assembling can be performed easily. Since it is attached, man-hours are unnecessary, and there is no variation because the positioning is accurate.

[Brief description of the drawings]

FIG. 1 is a side view of a disk serving as a film feeding main body A, and FIG.
The figure is a plan view of FIG. 1, FIG. 3 is a side view of a cut disk,
4 is a plan view of FIG. 3, FIG. 5 is a side view of a film feeding main body A obtained by pressing a cut product, FIG. 6 is a plan view of FIG. 5, and FIG. FIG. 8 is a plan view of the rotation driving gear B, and FIG. 9 is a diagram showing a state of connection between the film feeding main body A and the rotation driving gear B. DESCRIPTION OF SYMBOLS 1... Disk, 2... Thin tooth forming portion, 3... Drive tooth mounting base portion, 4... Boss portion, 5... Center hole, 6. , 8 ... burrs, 9 ... teeth, 10 ... center hole, 11 ... holes, 13 ... arbitrary deformation, A ... film feed dog main body, B ... rotary drive gear.

Claims (2)

(57) [Claims] 1. A tooth forming portion 2 formed by thinly cutting an outer peripheral edge of another surface of a disc 1 made of mild steel as it is,
Similarly, a driving tooth mounting base portion 3 slightly thicker than the tooth forming portion 2 formed on the inner side of the tooth forming portion 2 by cutting, and the driving tooth mounting base portion similarly formed on the central portion by cutting. 3, a center hole 5 formed at the center of the boss portion 4, a film feed tooth 6 formed by pressing the tooth forming portion 2, and the drive tooth mounting portion 3. A film feeding main body A composed of the boss portion 4 and a projection 7 parallel to the boss portion 4 formed by press working, a driving tooth 9 formed on the outer periphery by press working, and the A center hole 10 into which the boss portion 4 is fitted, and an engagement hole into which the protrusion 7 similarly formed by press working is engaged.
A boss 4 of the film feeding main body A in the center hole 10 of the rotation driving gear B, and a rotation of the projection 7 of the film feeding main body A by the rotation. Film feed gears obtained by engaging the drive gears B with the engagement holes 11 respectively. 2. A disk 1 made of mild steel is cut on one side only by a cutting machine on the other side, and a thin tooth forming portion 2 is formed on an outer peripheral edge thereof, and a driving tooth mounting base portion having a slightly thicker thickness is provided on the inner side. 3, a thicker boss portion 4 is formed at the center, and a center hole 5 is formed at the center of the boss portion 4. The disc 1 is formed by pressing a film feed tooth 6 to the tooth forming portion 2 by pressing. A projection 7 is formed on the driving tooth mounting base 3 in parallel with the boss 4 to form a film feeding main body A, and the surface of the film feeding main body A is polished and pressed. A rotary driving gear B having a driving tooth 9 formed on the outer periphery, a center hole 10 into which the boss 4 is fitted at the center, and an engaging hole 11 with the projection 7 is formed at an intermediate position. And the film feeder A
The boss portion 4 in the center hole 10 of the rotary drive gear B,
The projection 7 of the film feeding main body A is fitted to the engagement hole 11 of the rotation driving gear B so as to be fitted, and the fitting portion between the rotation driving gear B and the film transmission main body A is arbitrarily deformed. 13 A method of manufacturing film feed gears.