JP3275037B2 - Processing method of caps for writing or makeup tools - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for processing a cap of a writing instrument or a cosmetic tool, in which a leaf spring is provided inside a cap material, and the cap portion and the body portion are detachable by the leaf spring. More particularly, the present invention relates to a method for processing a cap of a writing instrument or a makeup tool which can be locked.

[0002]

2. Description of the Related Art Conventionally, a substantially cylindrical leaf spring has been internally provided as a cap for a writing tool, a makeup tool, etc., and the cap and the body of the writing tool or the makeup tool are detachably attached by the leaf spring. Various types that can be freely locked are provided. The leaf spring of such a cap may be bonded to the inside of the cylindrical container-shaped cap material with an adhesive, or may be locked in a locking groove formed inside the cap material by using the elasticity of the leaf spring itself. Was installed in.

[0003]

However, when the leaf spring is adhered with an adhesive, the adhesive often adheres to the cap material and deteriorates the appearance. It also led to a decrease in quality. Further, since the adhesive strength is weakened when the adhesive is aged, a failure in which the leaf spring falls off when the adhesive is old tends to occur, and the attachment of the leaf spring with the adhesive has a short life.

On the other hand, in the structure in which the leaf spring is locked in the locking groove inside the cap material by utilizing the elasticity of the leaf spring itself, the locking groove is cut inside the cylindrical container-shaped cap material. The process is difficult, and it takes a considerable amount of time to cut and form a locking groove in one cap material, so that mass production could not be performed in a short time.

In view of the above-mentioned disadvantages, a leaf spring is provided inside the cap material, and the cap and the body can be detachably locked by the leaf spring. Provided is a method of processing a cap of a writing instrument or a cosmetic tool, which enables a cap of the writing instrument or the cosmetic tool to have a good appearance and a detachable leaf spring can be attached inside, and can be mass-produced in a short time. Was created as an issue.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a method for forming a suitably long cylindrical container-shaped cap material by deep drawing, and performing drawing on the tip of the cap material on the opening side. At the same time, the diameter of the peripheral wall portion of the portion is formed to be smaller by a predetermined size, and at the same time, a step portion that is substantially perpendicular in cross section to the peripheral wall of the cap material is formed at the base of the peripheral wall of the distal end portion, and then the distal end portion is cut off. Then, the above-mentioned problem is solved by chamfering the surface of the step portion and providing an inclined surface inclined toward the inside of the cap material.

[0007]

According to the present invention, the peripheral wall portion at the tip of the cap material on the opening side is narrowed by drawing to reduce the diameter to a predetermined size, and at the same time, the base of the peripheral wall at the tip is provided with a cap. A step portion that is substantially perpendicular to the cross section with respect to the peripheral wall of the material is formed. And this step part,
When the leaf spring is housed in the cap material, the leaf spring is prevented from dropping from the opening.

Next, after the tip is cut off, a chamfering process is performed on the surface of the stepped portion to form a slope inclined toward the inside of the cap material, so that the opening of the cap material has a good appearance. In addition to being good, when it becomes a cap for a cosmetic tool or a writing instrument, it becomes smooth to insert the body into the cap.

Therefore, there is no need to perform a cutting process for forming a locking groove inside the cap material, and a writing tool or a writing tool or the like in which a leaf spring is provided and the cap and the body can be detachably locked. It becomes possible to process the cap of the cosmetic tool in a short time and mass-produce it.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. First, a deep drawing process is performed on a heat-resistant alloy plate, and a predetermined dimension (for example, a length of about 50 mm, an outer diameter of 9 mm, and an inner diameter of 8 m)
m) The cap material 1 in the shape of a cylindrical container is formed.

Next, the closing portion side of the cap material 1 is fixed by a three-jaw chuck (not shown) of a member rotating machine, and the cap material 1 is rotated in the axial direction. Insert The inscribed rod 10 includes a substantially cylindrical body 11 having a predetermined dimension (for example, an outer diameter of 6 mm) and the body 1
1 and a leading portion 12 having a predetermined dimension (for example, about 0.4 mm) larger in diameter than the body portion 11 and formed at the boundary between the body portion 11 and the leading portion 12. Part 11
A step 13 perpendicular to the cross section with respect to the peripheral surface of the head portion 12 is formed. Then, the inscribed rod 10 is inserted until the tip end surface of the head portion 12 comes into contact with the inner bottom surface of the cap material 1, and is rotated toward the one side of the inner peripheral surface of the contact cap material 1 while rotating the shaft. The peripheral surface is brought into contact with the inner peripheral surface of the cap material 1 (see FIG. 1 and process drawing (A)).

Further, in this state, the circumscribing rod 14 is brought close to the outer peripheral surface of the cap material 1 and pressed so as to sandwich the cap material 1 between the inscribed rod 10 and the circumscribing rod 14. The diameter of the peripheral wall portion of the distal end portion 1 is reduced by a predetermined dimension. The circumscribing rod 14 is formed in a substantially cylindrical shape having a predetermined dimension (for example, a length of about 15 mm and an outer diameter of 10 mm). Approach from one side toward
The outer peripheral surface of the cap material 1 is brought into contact with the outer peripheral surface of the cap material 1 at a position closer to the opening by the thickness of the cap material 1 than the contact position of the step portion 13 of the inscribed rod 10. 10 until it comes into contact with the body 11. Then, the diameter of the peripheral wall portion of the tip portion 2 of the cap material 1 becomes smaller by a predetermined dimension (about 0.4 mm) than the closed portion side,
At the base of the peripheral wall of the distal end portion 2, a stepped portion 3 that is substantially perpendicular to the cross section with respect to the peripheral wall of the cap material is formed (see FIG. 1 and process drawing (B)).

Then, the cap material 1 is vertically cut along the step 3 by a cutting machine (not shown), and the tip 2 is cut off (see FIG. 1 / process drawing (C)).

Next, the surface of the step 3 is chamfered. The chamfering process uses a chamfering cutter 6 having a substantially frustoconical shape and a fine grinding blade formed on the conical surface. The surface of the step portion 3 is ground by a conical grinding blade so as to be inserted into the portion (see FIG. 1 and process diagram (D)). Then, an inclined surface 4 that inclines toward the inside of the cap material 1 is provided around the step portion 3 (see FIG. 1 and process drawing (E)). This slope 4
Makes the opening of the cap material 1 look good,
When the cap material 1 is actually used as a cap for a writing tool or a makeup tool, the body of each tool can be smoothly inserted into the cap.

When a substantially cylindrical leaf spring 5 having a predetermined dimension is provided inside the cap material 1 thus configured, the front edge of the leaf spring 5 is hooked inside the step portion 3. The leaf spring 5 is mounted so as not to fall off. Therefore,
The cap material 1 is suitable as a cap for a writing tool or a makeup tool in which the cap portion and the body portion can be detachably locked by the leaf spring 5.

By the way, since the method for processing the cap of the writing instrument or the makeup tool of the present invention is constituted by press working and cutting work, (A) to (E) shown in the drawings.
The steps up to this point enable progressive processing and enable mass production of caps for writing tools or cosmetic tools in a short time.

The material, configuration, shape, and dimensions of the cap material, the number of specific steps until the inclined surface is formed on the cap material, tools, the specific shape during and after the process, and the configuration of the leaf spring The shape, dimensions, etc. are not limited to those of the embodiment, but can be freely set as appropriate.

[0018]

According to the present invention constructed as described above, an appropriately long cylindrical container-shaped cap material 1 is formed by deep drawing, and a drawing process is performed on the tip 2 of the cap material 1 on the opening side. The tip 2 is formed so that the diameter of the peripheral wall portion of the tip 2 is reduced by a predetermined dimension.
At the base of the peripheral wall, a stepped portion 3 substantially perpendicular to the cross section with respect to the peripheral wall of the cap material 1 is formed. Next, after cutting off the tip end portion 2, the surface of the stepped portion 3 is chamfered to form a cap material 1. When the leaf spring 5 is provided inside the cap material 1, the leaf spring 5 is hooked on the stepped portion 3, so that the inclined surface 4 which is inclined inwardly is provided.
The cap material 1 is prevented from falling off from the opening.
Therefore, the cap material 1 is suitable as a cap for a writing tool or a makeup tool in which the cap portion and the body portion can be detachably locked by the leaf spring 5.

The surface of the step 3 is chamfered so as to be inclined toward the inside of the cap material 1.
Is provided, the opening of the cap material 1 has a good appearance, and by the inclined surface 4, when the cap material 1 is actually used as a cap of a writing tool or a makeup tool, the inclined surface 4 The body of the tool can be smoothly inserted into the cap.

By the way, since the method for processing the cap of a writing instrument or a cosmetic tool of the present invention comprises a pressing process and a cutting process, the cap material 1 is subjected to a drawing process to form a stepped portion. The process from chamfering the surface of the part 3 to peripherally forming the inclined surface 4 can be performed by progressive feeding, which further improves the production efficiency when forming a cap for a writing tool or a cosmetic tool. .

As described above, according to the present invention,
It is possible to efficiently manufacture a cap for a writing tool or a cosmetic tool in which the cap portion and the body portion can be detachably locked by the built-in leaf spring, and it has an extremely beneficial effect, such as being able to contribute to cost reduction of these products. Things.

[Brief description of the drawings]

FIG. 1 is a process chart of an embodiment of the present invention.

FIG. 2 is a partially cutaway side view showing a state in which a leaf spring is provided in the cap material according to the embodiment of the present invention.

FIG. 3 is a perspective view of a leaf spring.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Cap material 2 Tip part 3 Step part 4 Inclined surface
Reference Signs List 5 leaf spring 6 chamfering cutter 10 inscribed rod 11 trunk 12 head
13 Step 14 Bounding rod

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) B21D 51/16 B21D 22/30 B21D 53/00 B21D 53/76

Claims (1)

(57) [Claims] An appropriately long cylindrical container-shaped cap material is formed by deep drawing, and a drawing process is performed on a tip portion of the cap material on the opening side so that a diameter of a peripheral wall portion at the tip portion is reduced by a predetermined dimension. At the same time, a step is formed at the base of the peripheral wall of the distal end portion, which is substantially perpendicular in cross section to the peripheral wall of the cap material. Then, after cutting off the distal end portion, chamfering is performed on the surface of the step portion. The method for processing a cap of a writing implement or a cosmetic implement, wherein a slope is formed around the cap material to incline toward the inside of the cap material.