JPH0987915A - Marking pin with bell and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a marking pin with bell, capable of surely preventing separation of the marking pin from the bell. SOLUTION: This marking pin with bell is obtained by providing an opening slit part 2A at the position opposite to an attaching cylinder 3 of a bell 2, opening the clearance of the opening slit part 2A in a width through which the head 1A of a marking pin 1 can forcibly pass, providing diameter of the head 1A of the marking pin 1 so as to be larger than that of the shaft part 1B, providing an engaging step part 3B for engaging the head 1A of the marking pin 1 in the interior of cylinder of the attaching cylinder 3 and providing a pressured fixing part 3A in the attaching cylinder 2A which is upper than the head 1A of the marking pin 1 engaged in the engaging step part 3B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bell-mounted hook needle having a bell on its head, and more particularly to a bell-mounted hook needle that reliably prevents separation of the bell and the needle, and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, the patent for a needle with a bell of this type
A needle with a bell registered as No. 1598010 and a manufacturing method thereof are known. In this bell-shaped needle, a needle head having a protruding portion formed on the circumferential side is inserted into an attachment cylinder formed in the bell, and the needle head and the attachment cylinder are integrally pressed and fixed.

[0003]

However, in the conventional needle with a bell, the needle head is inserted into the inside of the mounting cylinder through the projection of the mounting cylinder protruding from the bell. Therefore, even if the needle head and the mounting cylinder are pressed together, if the pressing step is insufficient, the needle and the bell may separate during use. The needle may be separated from the mounting cylinder or may be separated from the opening slit portion of the bell after the head of the needle is pulled out into the bell. Further, since the needle head is only crimped from the side surface to the mounting cylinder, it is easy to spread by repeatedly using this crimped surface. Therefore, even if there is no problem in the pressing process, the needle and the bell may be separated when used frequently. As described above, in the conventional needle with a bell, there is a small probability that the needle and the bell may be separated,
In the present situation where the so-called PL law is enforced in which product liability is demanded, it is necessary to prevent even this slight probability.

Therefore, the present invention was created to solve the above problems, and an object of the present invention is to provide a bell-attached waiting needle and a manufacturing method thereof, which can prevent the needle and the bell from being separated from each other. Is.

[0005]

In order to achieve the above object, the first means of the present invention is to provide an opening slit portion 2A at a position facing the mounting cylinder 3 of the bell 2. Then, the gap of the opening slit portion 2A is opened to a width that allows the head portion 1A of the needle 1 to forcibly pass. The head portion 1A of the needle 1 that has been forcibly passed through in this way does not come out of the inside of the bell 2 unless a forced operation is performed again.

On the other hand, the head 1A of the needle 1 is provided with a larger diameter than the shaft 1B. Then, a locking step 3B for locking the head 1A of the needle 1 is provided inside the cylinder of the mounting cylinder 3. Further, the crush fixing part 3A is provided on the mounting cylinder body 2A above the head part 1A of the needle 1 locked to the locking step part 3B. The head 1A of the needle 1 is
It does not come out of the mounting cylinder 3 by being locked to the locking step portion 3B of the mounting cylinder 3. Further, the crush fixing portion 3A prevents the head portion 1A of the needle 1 from returning the bell 2 to the crocodile.

The second means of the present invention is to set the needle 1 to the bell 2
The head portion 1A is set on the locking step portion 3B in the mounting cylinder body 3 by inserting the tip 1C of the needle 1 from the mounting cylinder body 3 through the opening slit portion 2A of the In this state, the side surface of the mounting cylinder 3 is crushed and fixed.

[0008]

Embodiments of the present invention will be described below.

The present invention has a bell with a stylus, which comprises a needle 1 and a bell 2 provided with a mounting cylinder 2A into which the needle 1 is inserted.

The entire length of the needle 1 is at least longer than the diameter of the bell 2, and is made of steel, stainless steel or other metal material which is not easily deformed. Then, the head 1A of the needle 1 is formed to have a larger diameter than the shaft 1B. In the illustrated example, the head 1A protruding in a disk shape from the peripheral side surface of the end portion of the needle 1 is shown, but the shape of the head 1A is not limited to this example, and a locking step portion of a mounting cylinder 2A described later is provided. The diameter may be larger than that of the shaft portion 1B so as to lock with the shaft 2B.

The bell 2 is integrally formed with a mounting cylinder 3 through which the needle 1 is inserted. The mounting cylinder 3 includes a small-diameter cylindrical portion 3C through which the shaft portion 1B is inserted from the tip portion 1C of the needle 1 and a head portion 1A of the needle 1.
And a large-diameter cylindrical portion 3D which is inserted therethrough. Then, at the boundary between the small diameter cylindrical portion 3C and the large diameter cylindrical portion 3D, the head 1 of the needle 1 is
A locking step portion 3B for locking A is provided. With this shape, it is possible to strongly prevent the needle 1 from coming out of the mounting cylinder 3. Further, the side surface of the large-diameter cylindrical portion 3D is crushed and the head portion 1A and the mounting cylindrical body 3 that are locked to the locking step portion 3B.
A crushing fixing portion 3A for fixing and is provided. Since the crushing fixing portion 3A presses and deforms the side surface of the mounting cylinder 3 from both sides, a large deformation weakens the strength of this portion. Therefore, the crushing fixing portion 3A is crushed to the extent that the side edge of the head 1A is locked.

The bell 2 is provided with an opening slit portion 2A at a position facing the mounting cylinder 3. The opening slit portion 2A is
Originally, the sound of the bell 2 is emitted, but the present invention
This opening slit portion 2A is intentionally used as the insertion port of the needle 1. Then, the gap between the opening slit portions 2A is set to the needle 1 head 1
Open to a width that allows A to be forced to pass.

Next, the manufacturing method of the present invention will be described. The needle 1 is inserted into the mounting cylinder 3 through the opening slit portion 2A of the bell 2 which is opened at a position facing the mounting cylinder 3. Next, the tip 1C of the needle 1 protruding from the mounting cylinder 3 is pulled out, and the head 1A of the needle 1 is forcibly inserted into the bell 2 through the opening slit 2A. Then, the head portion 1A is locked to the locking step portion 3B of the mounting cylinder 3. Then, the side surface of the mounting cylinder 3 above the head 1A of the needle 1 is crushed to fix the needle 1 and the bell 2.

[0014]

As described above, according to the present invention, by virtue of the above-mentioned constitution, the separation of the bell 1 and the bell 2 of the bell-holding needle can be reliably prevented.

That is, the locking step portion 3B of the mounting cylinder 3 prevents the needle 1 from falling out of the mounting cylinder 3.

Further, the needle 1 and the bell 2 are fixed by a crush fixing portion 3A which crushes and fixes the side surface of the mounting cylinder 3. If the crushing process of the mounting cylinder 3 is insufficient,
By being used repeatedly, even if the crush fixing part 3A is expanded, the opening slit part 2A through which the head part 1A of the needle 1 can pass becomes a gap that cannot be passed unless the needle 1 is forcibly operated. Therefore, the possibility that the needle 1 separated from the mounting cylinder 3 is separated from the bell 2 is eliminated.

As described above, the present invention has a structure that prevents double separation of the bell 1 and the bell 2 of the bell-held needle, so that an extremely safe bell-held needle can be provided.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view showing a main part of the present invention.

FIG. 3 is a process chart showing the manufacturing method of the present invention.

[Explanation of symbols]

 1 Needle 1A Head 1B Shaft 1C Tip 2 Bell 2A Opening Slit 2B Opening 3 Mounting Tube 3A Crushing Fixing 3B Locking Step 3C Small Diameter 3D Large Diameter Tube

Claims (2)

[Claims] 1. A bell-attached waiting needle in which a needle head is inserted into and fixed to a mounting cylinder integrally formed with a part of a bell, and an opening slit portion is provided at a position facing the bell mounting cylinder, and the opening slit portion is provided. The opening of the needle is opened to a width that allows the needle head to pass through, the needle head is provided with a diameter larger than the shaft portion, and a locking step portion for locking this needle head is provided inside the cylinder of the mounting cylinder. A pendant needle with a bell characterized in that a crush fixing portion is provided on a mounting cylinder body above a needle head locked to a locking step portion. 2. A method for manufacturing a bell-equipped waiting needle, wherein a head of a needle is inserted into and fixed to a mounting cylinder provided on a bell, wherein a bell opening slit portion opened at a position facing the mounting cylinder is inserted into the mounting cylinder. Insert the needle into the needle, pull out the needle tip protruding from the mounting cylinder, and forcibly press the needle head into the bell through the opening slit to lock the needle head on the locking step of the mounting cylinder. After that, the side surface of the mounting cylinder above the needle head is crushed to fix the bell and the needle, and a method for manufacturing a bell-mounted waiting needle.