JPS6154994A - Manufacture of nondirectional pen body - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a method of manufacturing a non-directional pen body.

The 7-piece body of a fountain pen has a direction when writing, but in order to make it non-directional like a ballpoint pen, three blades protrude radially at equal intervals and the front is shaped into a conical shape. A non-directional pen body with a pen point ball welded to it has been put into practical use. This type of non-directional pen body was manufactured by bending a roughly triangular plate material into a 120 degree V shape, placing three pieces back to back and spot welding them. Therefore, the cost is high due to the large number of component parts and processes, and the positional IQ of the plate-shaped rough materials and the pen point ball deviates due to spot welding of overlapping and welding the pen point ball to the tip, resulting in an error. There was a problem that many non-defective products were produced. For this purpose, we pulled the pipe material into a shape with three or more blades protruding radially at equal intervals, with vertical gaps formed within the blades, and changed the shape of the blades into a conical shape. The pen body is formed by cutting. Therefore, the base end of this pen body has three Vl
Although the two pieces are integrated back to back, the shaved conical blade portion is in a state where the three V-shaped pieces are each disassembled. Then, the slot that serves as the ink groove is cut through from the pen tip at the tip, but this one (wait for it, 3
Since the V-shaped pieces are separated, they spread widely. For this reason, the sliding part 114 of the jin is closed by plastic deformation with a press etc. in the later kingship, but it is difficult to close it accurately again when the -0 mark is widened, and the pen tip is misaligned L''C A problem occurs in which the writing quality is extremely noticeable (1).Also, the tip of the pen, which has expanded widely outwards, is moved inward, creating a large space inside the pen tip, but this empty f1 .11c I/K stays and when the ink is discharged with the P/Rate upwards, this ink falls towards the pen core due to its large mass, which causes the ink to run out at the start of the prefecture. was there.

Therefore, the present invention provides a non-directional pen body that does not widen greatly when cutting through the Suriji JII groove, has the ability to accurately write KW, has good writing taste, and does not have ink cut. The purpose is to provide a method for manufacturing Ll whose composition is 3
A book or more blades protrude radially at equal intervals,
There is also a step of pulling out the pipe material and cutting it to a predetermined length so that a vertical gap is formed in the blade, spot welding the blade, and attaching the blade pieces to each other so that they will not separate during the next process of cutting. The process involves cutting the front part of the blade part by grinding to form it into a conical shape, and cutting a groove from the tip in the direction of the gap between each blade part to the spot welding point or its vicinity. and a step of plastically deforming the slotted groove of the nib at the tip using a press or the like rather than closing it.

Embodiments of the present invention will be specifically described below based on the drawings.

The material 10 is a stainless steel pipe with an outer diameter of about 5mm and a wall thickness of 0.3mm, and this material 10 is connected to three blades with a thickness of 1mm as shown in Figure 2. 1 protrude radially at intervals of 120 r, and the space between them is pulled out in a shape with valleys 2. At this time, there are gaps 1...11 in the blade part 1 whose width is less than O, i yxa due to the circumference of the material 10. A hole 12 exclusively for ink is formed in the center. This is then cut into lengths of 15 degrees. In the next step, as shown in Fig. 3, spot welding is performed at the center of the blade part 1 or a little one side thereof, and the blade parts are welded to each other at the welding fixing part 5 so as not to separate due to the abrasion in the first process. Kli! Arrived i1. Next, as shown in FIG. 4, the front part of the blade part 1 is ground to form the whole into a conical shape, and the outer Ffi+ of the ground part 1a has a circular arc shape and tongue 1, and the tip part u5 has a radius of 0.5. It is formed into a hemispherical shape about the size of a fin, and that part becomes the pen tip 3, forming the external shape of the pen body. Therefore, the base end of the pen body is integrated, and as shown in Figure J5, the center of the conical blade part, which is the grinding part 1a, is spot welded, and a V-shaped piece is formed at the welded fixed part 5. Fixed. Next, as shown in FIG. 6 and FIG.
The grinding wheel 6 (() is cut through the gap 11K to the welded part 5. This slot n4 serves as an ink passage to the pen tip 3, and when coughing, the blade returns to improve the writing quality. In addition, there is a ring which plays the role of drawing out the ink by this swab K, and since the gap 1 and the sliding part 9:4 are in communication, the 1φ gap 11 plays the role of an ink retaining part.

This suriwari! The width of the groove 4 is about 0.1 to 0.15 mm, or it is fixed by f6 times fixed 51c, so the V-shaped piece of the grinding part 1a does not expand when cutting with the grindstone 6. Therefore, it can be cut within the above dimensions.

When the pen body is completed, if the groove 4 of this width is present in the nib 3, the ink hair MW phenomenon will be weak due to the large width.
Also, when writing, it gets caught on the paper and has a bad writing quality,
In the end, it becomes a closed shape Qp, but because of this loss, the cross section of the Ben light 3 is no longer circular, so
With the sliding groove 4 closed, the nib 3 is finished into a circular shape using the chuck 1- with a hard grindstone! Ensure non-directionality regarding item 1. And, the previous self's damage II v
When cutting through 4 or by chucking with an open flat blade, use a soft whetstone 15 to chamfer 0.02 degrees along the glue. This chamfering makes it easier to write without getting stuck on the paper when writing, but with this level of chamfering, the non-directionality does not become too bright.

Incidentally, the pen tip 3 is subjected to a hardening process, and examples of the process include ion nitriding, ion blating, and hard chrome plating. By any of these curing treatment methods, the hardness of the pen tip 3 is sufficient, and a durable pen body can be obtained. However, without using the hardening method, welded a carbide bonded Ben point pole to the tip and connected it to the pen tip (- is also fine.
During the curing process, the front part of the pen body is brought together by the press 2 as shown in Fig. 8 to complete the pen body, and the three-pronged pen core 7 is attached to the trough 2. It is attached to and used for miscellaneous notes. In addition, in the above embodiment, the blade part 1 is 1
Three blades were provided at 20 degree intervals, but this blade part l was
More than one book may be provided.

As described above, in the present invention, the pipe material is made into a conical shape with protruding blades by drawing and grinding, and the blade pieces are fixed in advance by spot welding, so that the blade pieces can be separated by cutting. Cut through the 9 parts without any trouble l1
AK does not expand widely. For this reason, it is possible to easily and accurately close the pen tip at the tip in the subsequent closing process, and a pen body with a good texture can be obtained. Also,
Since no space is formed inside the bend body during the gathering process, a large mass of ink does not remain inside, and it is possible to prevent ink from running out due to ink falling. According to the invention, therefore:
J with a non-directional pen type that has a good writing feel and does not run out of ink
A J'J manufacturing method can be provided.

[Brief explanation of drawings]

FIG. 1 to FIG. 9 are process explanatory diagrams of a sister example of the present invention. 1... Feather part 2... Valley part 3... Pen nib 4
... Sliding groove 5 ... Welding fixed part 7 ... Pen core 10 ... Material 11 ... iI〃Applicant -
Agent 4P Riju 1) Toranosuke Hara Figure 3

Claims (1)

[Claims] A process of pulling out the pipe material and cutting it to a predetermined length in a shape in which three or more blades protrude radially at equal intervals, with vertical gaps formed within the blades, and a process of spotting the blades. A process of welding and fixing the blade parts to each other so that they will not separate in the next step of grinding, a process of grinding the front part of the blade part to form a conical shape, and a process of forming each blade part from the tip. A non-directional pen characterized by comprising the steps of: cutting a groove in the direction of the gap up to or near the spot welding point; and plastically deforming the pen tip using a press or the like so that the groove is closed. How the body is manufactured.