JPH0431100Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a ball launcher for a pachinko machine.

[Prior Art] The ball launcher of a pachinko machine plays an important role in driving pachinko balls into a game board. This launching punch is required not only to simply launch balls, but also to be stable enough to consistently and accurately launch balls with the required strength to continuously supply the balls to the launch position of the rail.

Conventionally, this firing punch has been used for a long time in which a punch tip member made of a spring wound in a coil shape is attached to the tip of a metal firing punch main body. When this firing punch is actuated by a spring force applied to the main body, the spring punch tip member hits and fires a pachinko ball.

However, this spring-made punch tip member has the problem that vibration from the impact remains, which adversely affects the next impact during continuous firing, and it is difficult to attach it to the punch body, making it difficult to accurately locate the center. This made workability poor, and it was also difficult to maintain as it was prone to going awry due to fatigue.

For this reason, various types of ball-launching punches have recently been proposed in which the spring punch tip member is made of synthetic rubber or elastic synthetic resin.

However, all of the conventional proposals are made of synthetic rubber, which is molded separately from the launching punch body.
Alternatively, the punch tip member made of synthetic resin is attached and assembled, and due to this assembly method, the center of the punch tip member may be shifted, or the attachment state may change due to long-term use, making accurate firing impossible. It was hot.

One advantage of molding and assembling this punch tip member separately is that by making it removable, it is advantageous for maintenance, such as making it possible to repair by changing only this punch tip member. Due to its structure, it has the disadvantage of being prone to looseness.

[Problems to be solved by the invention] The present invention has been researched and developed in order to improve the problems of the conventional batting ball launcher as mentioned above. Minimize the remaining amount of the ball so that it does not have a negative effect when hitting the next ball, and integrate the punch tip member with the firing punch body so that the center of the punch tip member is always in the normal position and stable firing is possible. In addition, the purpose is to prevent looseness in the connection between the two as a result of use, and to reduce the weight of the entire firing pestle to suppress the occurrence of impact vibrations during striking and to enable smooth continuous striking. .

[Means for Solving the Problems] The present invention was made based on the above-mentioned objectives, and its characteristics are that the punch tip member of the ball launcher is made of a soft thermoplastic synthetic resin; This ball launching punch for a pachinko machine has a main body made of a soft thermoplastic synthetic resin, and the two are integrally molded during the molding of the launching punch main body.

The firing punch of the present invention strengthens the bond between the punch tip member and the firing punch body by integrating them, thereby increasing the precision of the punch tip member that directly hits the ball, and stabilizing it at all times. This is to ensure accurate hitting and to withstand long-term use.

Examples illustrating this invention will be described in detail below.

[Example] Figure 1 is a side view of a ball launcher according to the present invention, Figure 2 is a front view of the main parts, and Figure 3 is a view of Figure 1.
This is a sectional view taken along a line, and reference numeral 1 in the drawing represents a firing punch body, and 2 represents a cylindrical punch tip member attached to the tip of the firing punch body.

In this embodiment, the punch tip member 2 is a firing punch body 1.
The proximal end 2a is embedded in the vaginal opening 3, which has a cylindrical distal end and opens toward the direction of impact, and is integrally attached.

This vaginal opening 3 has a stepped portion 4 at its opening so that the entrance is narrow and the back is wide, so that the swollen proximal end 2a that fits inside will not easily escape.

Incidentally, the punch tip member 2 is made of elastic, soft thermoplastic synthetic resin, and the firing punch body 1 is made of hard thermoplastic synthetic resin. 2 into a predetermined shape, the punch tip member 2 is set in a mold for forming the firing punch body 1, and the mold is filled with the molten plastic synthetic resin and molded. Both are manufactured in one piece.

In manufacturing this punch, for example, thermoplastic polyester elastomer is suitable for the punch tip member 2, and in the example, it is manufactured using the product name "Hytrel" manufactured by Toray Industries, Inc., and the punch body 1 is made of ABS.
A resin is suitable, and in particular a resin containing glass fiber is suitable in order to increase the strength of the resin, and in this example, the resin material "Toyorak" manufactured by Toray Industries, Inc. was used.

The punch tip member in the present invention is made of the above-mentioned thermoplastic synthetic resin, and its melting point is as high as 160°C or higher, whereas the thermoplastic synthetic resin material of the firing punch body 1 is
Since the temperature is as low as 100°C to 105°C, even if the previously molded punch tip member is set in the mold of the firing punch body 1 and filled with molten resin, this will not affect the punch tip member at all. It is possible to embed it in a predetermined position and integrate it, and it is possible to obtain a structurally strong bond.

[Effects of the invention] The firing punch of the present invention is constructed as detailed in the above-mentioned embodiments, and therefore, according to this invention, the punch tip member is integrally joined to the tip part during molding of the firing punch body. Because of this, it is firmly fixed, and since the two are connected at a fixed position inside the mold, it is possible to obtain an extremely stable batting ball launcher with high accuracy and no deviation in the center of the ball. It turns out.

In addition, since the punch tip member of the present invention is made of a soft synthetic resin with elasticity, there is no residual vibration caused by impact, and furthermore, the base end that connects to the firing punch body can be inserted into the vaginal introitus provided at the tip of the punch body. Since only the tip of the batting tip is exposed and there is little swinging part, the ball will not fly evenly even when fired continuously, which is advantageous. Furthermore, the main body of the firing punch is also molded from synthetic resin, and the entire body is lightweight, so there is no vibration caused by collision with the stopper during impact, so stable firing can be expected.

Since the firing punch of the present invention is entirely integrated, it is not possible to replace only the punch tip member, but on the other hand, due to this integrity, the punch tip member can always be set at a fixed firing position by attaching the firing punch body. This has the advantage that anyone can replace the firing pestle without requiring any special skill.

[Brief explanation of the drawing]

The drawing shows one embodiment of the present invention.
The figure is a side view, FIG. 2 is a front view of essential parts, and FIG. 3 is a cross-sectional view taken along the line of FIG. 1. 1... Launching punch body, 2... Punch tip member, 2a...
Proximal end of the pestle tip member, 3...vaginal opening.

Claims (1)

[Scope of utility model registration request] The punch tip member 2 of the ball firing punch is made of a soft thermoplastic synthetic resin and integrally has a proximal end portion 2a that expands in diameter, while the firing punch main body 1 has a lower melting point than the punch tip member 2. A vaginal orifice 3 that opens in the direction of impact is provided at the distal end using hard thermoplastic synthetic resin, and the proximal end 2a of the punch tip member is embedded in the vaginal orifice 3 during molding. A ball-launching pestle for a pachinko machine that is characterized by being integrated into one.