JPH055517B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pinball game machine that is provided with a ball firing means that fires a ball based on the operation of an operating handle.

[Prior Art] This type of pinball game machine has been generally known for a long time, for example,
There was one described in the publication. This conventional pinball game machine has a frame-shaped front frame with a window hole provided approximately in the center, and a game board mounting member for attaching the game board is attached to the front frame.

[Problems to be Solved by the Invention] Considering the player's ball-hitting operation posture, etc., it is possible to provide a ball-launching means for hitting a ball into the playing area formed on the front side of the game board in the front frame. In addition, it is desirable that the game board mounting member be provided with a ball launcher rail for causing the ball fired by the ball launcher to be launched in a predetermined direction.

In this way, in a conventional pinball game machine, when the ball launcher is provided in the front frame and the ball launcher rail is attached to the game board mounting member, when the game board mounting member is attached to the front frame, it is difficult to adjust the mounting position. If this happens, the relative positional relationship between the ball launcher and the ball launcher rail will deviate from the designed positional relationship.
A problem arises in that the ball ejected by the ball ejecting means is no longer guided smoothly to the ball ejecting rail, and the ball ejected by the ball ejecting means is not properly hit into the game area as originally designed.

In other words, in conventional pinball game machines, the front frame and the game board mounting member, which were manufactured separately, were assembled together at the assembly manufacturing stage. There is a risk that an assembly error will occur when assembling the parts, and the above-mentioned drawbacks arise due to the assembly error.

The present invention was devised in view of the above-mentioned circumstances, and its purpose is to prevent the inconvenience of balls not being properly launched due to a relative positional misalignment between the front frame and the game board mounting member. It is.

[Means for Solving the Problems] The present invention is a pinball game machine that is provided with a ball firing means that fires a ball based on the operation of an operating handle, and which has a window hole approximately in the center. A front frame made of synthetic resin and formed into a frame shape is provided with a front frame made of synthetic resin, and a ball launch rail for causing the ball fired by the ball launcher to be launched in a predetermined direction; The game board includes a game board forming a game area into which balls are hit, and a game board mounting member for attaching and fixing the game board, and the front frame and the game board mounting member are formed of a resin molding mold. It is characterized in that it is integrally molded during resin molding using a frame, the ball launch means is provided on the front frame, and the ball launch rail is provided on the game board mounting member.

[Function] According to the present invention, the front frame and the game board mounting member are
Since the front frame and the game board mounting member are integrally molded during resin molding using a resin molding frame, it is possible to prevent the inconvenience that the relative positional relationship between the front frame and the game board mounting member is shifted.
Since the front frame is provided with a ball ejection means and the game board mounting member is provided with a ball ejection rail, the ball ejection means and the ball ejection means due to the misalignment of the relative position between the front frame and the game board mounting member. A deviation in the relative positional relationship with the batted ball launch rail will not occur.

[Embodiments of the Invention] FIG. 1 is an external perspective view of a pachinko game machine 1 that is the object of the present invention. In the figure, a pachinko gaming machine 1 includes an outer frame 2 and a front frame 3. The outer frame 3 holds the front frame 3 via a hinge 35. Therefore, the front frame 3 rotates (opens and closes) relative to the outer frame 2 around the hinges 35 attached to the upper and lower left when viewed from the front.
It is possible.

In addition, in FIG. 1, 31 is a metal frame, 32 is a glass door frame, 33 is a ball tray, 34 is an operating handle,
36 is a front plate, 37 is a prize ball payout port, and 38 is a batted ball supply tray, all of which are attached to the front frame 3.

FIG. 2 is a perspective view of one embodiment of the invention. In the figure, the front frame 3 of the pachinko machine 1 has a frame-like shape with a window hole 301 formed approximately in the center. A groove 302 is formed on the front side of the front frame 3 at the peripheral edge of the window hole 301 . The glass door frame 32 described above is fitted into this groove 302. Further, in the lower part of the front frame 3, there is a through hole 304 for attaching an operation handle and a ball tray communication port 303.
is formed. Furthermore, small holes 305 are formed as necessary for attaching a decorative plate, a ball tray, etc., which will be described later.

The first feature of this embodiment is that the front frame 3 of the pachinko machine, in which necessary grooves, through holes, etc. are formed as shown in FIG. 1, is integrally molded from synthetic resin. Such integral molding can be produced at once by using a mold or the like molded into a desired shape. Therefore, unlike the front frames conventionally manufactured from wood, there is no need to perform operations such as drilling necessary through holes after forming the frame body that is the basis of the front frame, and the manufacturing process can be simplified. . Moreover,
By using molds, it is possible to mass-produce a large number of products of the same shape, and mass production also has the advantage of requiring almost no skilled technology.

FIG. 3 is a sectional view taken along the line - of the front frame shown in FIG. 2. The synthetic resin structure of this example will be explained with reference to FIG.

In this embodiment, the front frame 3 has a surface skin layer 3A.
It is molded from synthetic resin and has a structure consisting of an inner foam layer 3B and an inner foam layer 3B. Therefore, when observed from a certain side to the back side, it has a three-layer structure: skin layer 3A, foam layer 3B, and skin layer 3A. This is the second feature of this embodiment.

The front frame 3 of a pachinko machine is made with an internal foam layer 3 like this.
By using a three-layer synthetic resin containing B, there are the following advantages.

(1) Lighter weight can be achieved. This is because the resin density of the foamed layer 3B is lower than that of ordinary synthetic resin since it has the foamed layer 3B inside.

(2) Noise prevention can be achieved. This is the internal foam layer 3B
This is because the sound absorption effect is high. Generally, in the pachinko machine 1, the sound of hitting balls, the flowing sound of prize balls being supplied and ejected, etc., echo on the front frame 3. For example, a pachinko game parlor as a whole generates a considerable amount of noise. Therefore, if a three-layer front frame 3 having an internal foam layer 3B is used as in this embodiment, the sound reverberating on the front frame 3 will be absorbed by the internal foam layer 3B, thereby preventing noise. Become.

(3) A pachinko machine with less vibration. This is 3
This is because the front frame 3 having a layered structure has a sound-absorbing effect as described above, and also absorbs vibrations. Therefore, the foam layer 3B absorbs vibrations such as the recoil of the ball due to the ball hitting operation, and the vibrations are less likely to be transmitted to the customer's hands, making the customer less tired even when playing the game for a long time.

(4) Pachinko machines can be made with high aesthetic appeal. This is because in the front frame 3 having the foam layer 3B inside, so-called shrinkage does not occur in the skin layer 3A on the surface thereof.
Therefore, the surface condition of the front frame 3 can be kept uniform, and the front frame 3 with a good finish can be formed.

As described above, the front frame 3 is preferably molded from a synthetic resin having a three-layer structure of the surface skin layer 3A and the internal foam layer 3B, thereby producing various advantages.

In the front frame 3 of the above embodiment, the same synthetic resin material (for example, ABS resin) is used for the surface skin layer 3A and the internal foam layer 3B. In this way, if the front frame 3 is made using the same material for the skin layer 3A and the foam layer 3B, it is possible to obtain a solid front frame 3 with good adhesion between the layers of the three-layer structure. However, as will be described later, it is also possible to form the surface skin layer 3A and the internal foam layer 3B using a combination of different materials.

4 and 5 are perspective views showing other embodiments of the present invention, with FIG. 4 showing a front side perspective view and FIG. 5 showing a back side perspective view.

The front frame 3' shown in FIGS. 4 and 5 differs from the previously described front frame 3 (FIGS. 2 and 3) in that it is integrally molded including the game board mounting member 320. That's true. That is, a game board mounting member 320 is integrally molded on the back side of the front frame 3' so as to surround the window hole 301 (see FIG. 5).

In this way, if the front frame 3' is integrally molded including the game board mounting member 320, the ball hammer (not shown), which is an example of a ball launching means, and the game board mounting member 320 can be attached to the front frame 3'. There is an advantage that the positional relationship with the ball launch rail (not shown) to be attached to the board attachment member 320 is accurate.

More specifically, a ball firing rail (not shown) is attached to the front side 320A of the game board mounting member 320. Further, a ball hitting hammer is attached in relation to the operating handle penetrating hole 304 of the front frame 3'. The pachinko ball hit by the ball hammer is guided to the game board along a ball launch rail provided on the front side 320A of the game board mounting member 320. Therefore, if the positional relationship and attachment relationship between the ball hammer and the ball launch rail are accurate, the movement of the pachinko ball will be smooth.

Furthermore, it is more preferable that the game board mounting member 320 is formed with the prize ball communication port 321 and other necessary holes and shapes. This is because the labor required for subsequent processing can be saved.

It should be noted that this embodiment described in FIGS. 4 and 5 is also preferably molded from a three-layer synthetic resin as in the previous embodiment. This is because the same effect as described above can be obtained.

FIG. 6 shows the front frame 3' of the second embodiment,
It is an exploded view illustrating how a metal frame 31 with a glass door frame 32 attached, a front plate 36 with a batted ball supply tray 38, a decorative plate 39, a ball tray 33, an operating handle 34, etc. are attached.

Furthermore, FIG. 7 is a perspective view of the second embodiment as viewed from the back side, showing the state in which the mechanism plate 70 is opened and closed. In FIG. 7, 40 is a game board, and 41 is a fastening metal fitting.

In the first and second embodiments described above, the front surface of each front frame 3, 3' may be decorated with carvings or the like. When applying such decorations such as engravings, use a mold in which the decorations are formed, and engrave the front surfaces of the front frames 3, 3' at the manufacturing stage, which will be described later. It is convenient for manufacturing to perform integral molding at the same time as molding. When engraving or the like is applied to the front surface of the front frames 3, 3', the overall aesthetic shape of the pachinko machine using the front frames 3, 3' is improved, which is effective in attracting customers, for example.

FIG. 8 is a perspective view showing still another embodiment of the invention. A feature of the embodiment shown in FIG. 8 is that a decorative board 306 made of a thermosetting resin board, such as melamine, is bonded to the entire front surface of the front frame 3'.

In this way, by bonding the thermosetting resin decorative board 306 to the surface of the front frame 3', it is possible to prevent the player from accidentally touching the surface of the front frame 3' with a lit cigarette, for example. , its surface is not thermally deformed and its aesthetic appearance is not impaired.

The front surface of the front frame 3' and the thermosetting decorative board 306 can be easily joined using an adhesive, a set screw, or the like. In addition, when joining with adhesive, apply the adhesive after heating the surface of the front frame 3,
It is preferable to bond the decorative board 306. This is because heating can strengthen the adhesive force between the front frame 3 and the decorative board 306.

In each of the above embodiments, the batted ball supply tray 38 and the ball receiving tray 33 provided at the lower front portion of the front frames 3, 3' are
It is configured to be attached to the front frames 3, 3' via the front plate 36 and decorative plate 39, for example, with screws or the like. However, the ball supply tray 38 and the ball receiving tray 33 can also be molded integrally with the front frames 3, 3' from synthetic resin. If the ball supply tray 38 and the ball receiving tray 33 are integrally constructed in this way, there is an advantage that the manufacturing process of the entire pachinko machine can be simplified. In this case, the front plate 36, the decorative plate 39, etc. are not particularly necessary.

Next, a method for manufacturing a pachinko machine front frame molded from a three-layer synthetic resin, which is a preferred example among the above-mentioned examples, will be described in detail.

FIG. 9 shows an injection molding apparatus 90 for manufacturing an embodiment of the present invention. In the figure, synthetic resin material is introduced from a hopper 901. The input material is transferred to the material supply device 902.
In the material supply device 902, the synthetic resin material is heated and melted. The melted resin material is divided into one for forming a surface skin layer and one for forming an internal foam layer.
A foaming agent is mixed into the resin material for forming the internal foam layer. This step will be detailed later. Then, each molten resin is extruded by an extrusion device 903 and filled into the mold 100 via a heating cylinder 904. In addition, in the figure, 905 is a mold clamping cylinder that clamps and fixes the mold 100.

10A and 10B are more schematic and illustrative views of the injection molding apparatus 90 shown in FIG. 9 to facilitate explanation of its operation.
In FIGS. 10A and 10B, accumulators 906 and 907 are used as an example of the extrusion device 903 shown in FIG. 9. This 10th
The steps up to injecting the molten resin into the mold 100 will be described in detail with reference to FIG. A and FIG. 10B.

First, the explanation will be made mainly with reference to FIG. 10A. A synthetic resin material 200 for forming the front frame of the pachinko machine is produced from the hopper 901 of the injection molding device 90.
Insert. The synthetic resin used as the material is preferably polystyrene or ABS resin. This is because each of these resins is relatively rigid and has a high viscosity. Furthermore, each of these resins has the advantage that it foams better than other synthetic resins, such as polyolefin, and has fine and uniform cells.

Synthetic resin material 20 introduced from Hoppa 901
0 is transferred to material supply device 902. In the material supply device 902, the synthetic resin material 200 is heated and melted. The molten synthetic resin material 200 is divided into a surface skin layer forming material 200a and an internal foam layer forming material 200b.

Further, a foaming agent 300 is mixed into the internal foam layer forming molten resin 200b. As the foaming agent 300, an organic foaming agent whose generated gas is _N2 is mainly used. Alternatively, for example, N ₂ gas may be directly mixed in at high pressure. Furthermore, inorganic blowing agents such as sodium bicarbonate and ammonium carbonate may be used. When such an inorganic foaming agent is used, its decomposition temperature is low, gas generation is gradual, and a product with a relatively low foaming rate of the internal foam layer is produced.

Note that in this material supply device 902, a coloring agent may be mixed into the molten resins 200a and 200b. In particular, the molten resin 200a for forming a surface skin layer
By adding a coloring agent to the product, it is possible to create a product that is colored in a desired color and has a beautiful appearance.

The surface skin layer forming molten resin 200a and the internal foam layer forming molten resin 200b mixed with the foaming agent 300 are immediately accumulated in the accumulators 906 and 907. Each accumulator 90
6,907, molten resin 200a, 200b
is heated to prevent it from solidifying. moreover,
For example, air pumps 912, 913 and piston 9
14,915. Therefore, the molten resin 200b for forming the internal foam layer does not foam within the accumulator 907. In addition, from the material supply device 902 to each accumulator 9
Valves 910 and 911 are provided in the passages to 06 and 907 to prevent the molten resins 200a and 200b in the accumulators 906 and 907 from returning during injection, which will be described later.

Next, description will be given mainly with reference to FIG. 10B. Suppose that the amount of each molten resin 200a and 200b accumulated in each accumulator 906 and 907 reaches the amount required to fill mold 100. Then, valves 908 and 909 in the filling path to mold 100 are opened in a predetermined order (described later). At the same time, air pumps 912 and 9
Accumulators 906 and 907 by 13
Increase the internal pressure. As a result, the pistons 914 and 915 in the accumulators 906 and 907 descend, and the cavity 101 of the mold 100 is filled with molten resin from the injection nozzle 916 at high speed.

FIGS. 11A to 11C are diagrams for explaining a molding process for injecting molten resin using a two-channel nozzle to form a three-layer structure of a surface skin layer and an internal foam layer. The injection method will be described in detail with reference to FIGS. 11A to 11C.

In FIG. 11A, a nozzle 916 has a concentric tip end portion that injects resin. That is, a nozzle 916b is arranged at the center, and nozzles 916a are arranged surrounding it. In this embodiment, first the nozzle 916
Molten resin 2 for forming a surface skin layer from a
00a is injected into the cavity 101 of the mold 100 through the gate 102. The amount of this injected molten resin 200a depends on the capacity of the cavity 101, but for example, it is about 20% of the cavity 101.
amount is injected. This injection is, for example, the 10th
In Figure A, this is done by opening only the valve 908 and extruding the molten resin 200a from the accumulator 906.

After the molten resin 200a forming the skin layer is injected, the molten resin 200a forming the skin layer and the molten resin 200b forming the internal foam layer are simultaneously injected. This situation is depicted in Figures 11B and 11C. In this way, the molten resin 2
To inject 00a and 200b simultaneously, for example, in FIG. 10A, valves 908 and 9
09 and extrude each molten resin from the accumulators 906 and 907.

Molten resin 200a and 200b injected at the same time
This means that the molten resin 200b is always surrounded by the molten resin 200a without mixing with each other in the cavity 1.
Expanding within 01. This is because the tips of the nozzles 916 are concentric circles, and the molten resin 200b forming the internal foam layer is injected from the central nozzle. In addition, the molten resin 200a
and molten resin 200b, blowing agent 3
This is because the molten resin 200a without 00 mixed therein has a higher viscosity, and the molten resin 200b gradually foams and expands into the cavity 101 while increasing its volume. Therefore, the molten resin 200a forming the surface skin layer spreads inside the cavity 101 while being spread to an even thickness.

In the simultaneous injection of the molten resins 200a and 200b, the pressure for injecting the molten resin 200a forming the surface skin layer (for example, the pressure of the accumulator 906 (FIG. 10A)) is different from that of the molten resin 200b forming the internal foam layer. It is preferable to set the pressure to be slightly lower than the injection pressure. This is because the surface skin layer of the pachinko machine front frame formed is thinner, and the internal foam layer occupies a larger proportion, improving sound absorption and reducing weight.

When the cavity 101 of the mold 100 is filled with molten resin, injection is stopped. Preferably, the molten resin 200b forming the internal foam layer is
Since the volume increases as the foaming progresses, it is better to stop the injection before the cavity 101 is 100% filled.

FIG. 12 is a side sectional view showing another example of the injection nozzle used in the above manufacturing process. 12th
A three-channel nozzle is depicted in the figure. When such a three-channel nozzle is used, there are the following advantages compared to the two-channel nozzle described above. In other words, in the case of a two-channel nozzle,
This has the disadvantage that the skin layer near the gate 102 tends to become thinner. Therefore, 3 like this
By using a channel nozzle, it is possible to prevent the skin layer near the gate 102 from becoming thinner.

FIG. 13 is a cross-sectional view of the synthetic resin molded by the above manufacturing process. As shown in the figure, the molded synthetic resin has skin layers A on its front and back surfaces. This skin layer A is a normal non-foamed synthetic resin (for example, ABS resin).

The internal foam layer B sandwiched between the front and back skin layers A is a synthetic resin foamed with a foaming agent. A large number of air bubbles B1 are formed within this synthetic resin. Therefore, the foam layer B has a light weight per unit volume and has good vibration and sound absorption properties.
In addition, at the manufacturing stage, since this internal foam layer B has bubbles and has poor thermal conductivity, it is necessary to allow sufficient cooling time for the molded product, that is, the front frame of the Pachinko machine to solidify.

In the above description, the surface skin layer A and the internal foam layer B are made of the same synthetic resin material (e.g.
It is now molded using ABS resin. However, for example, the surface skin layer A may be formed from polystyrene, and the internal foam layer B may be molded from a resin obtained by adding an organic foaming agent to ABS resin.

Next, the mold 100 used in the manufacturing process described above will be explained.

14A and 14B are diagrams for explaining the general shape of the cavity 101 of the mold 100 and the position of the gate 102. FIG. The mold used is a mold for molding a frame-shaped front frame of a pachinko machine with a window hole provided in the approximate center. Mold 1 for molding such a frame-shaped pachinko machine front frame
00, this frame-shaped cavity 101
is formed. This cavity 101 is made according to the type and necessity of the front frame of the pachinko machine to be manufactured.
The front frame has a shape in which unevenness, holes, etc. are formed at predetermined locations.

The material of this mold may be one used in general injection molding, but depending on the type of gas generated when the internal foam layer is foamed, the metal surface of the cavity 101 may be corroded. Therefore, it is preferable to apply hard chrome plating to the surface of the cavity 101.

Furthermore, since the resin molded in the mold includes an internally foamed resin with poor thermal conductivity, it is preferable that the mold be provided with sufficient cooling water grooves (not shown).

Next, the position of the gate for injection will be explained. FIG. 14A shows a frame-shaped front frame to be molded in which gates for injection are provided at portions corresponding to a pair of diagonal portions. If the gate 102 is provided in this manner, the molten resin will flow and fill the cavity 101 as shown by the arrow 102a, and the pachinko machine front frame to be molded will have a partial balance between the surface skin layer and the internal foam layer. It is possible to form a front frame of a pachinko machine with a good weight balance without shifting to one side.

FIG. 14B shows a frame-shaped front frame to be molded with a gate provided at a portion corresponding to the center of one end side. When injection molding is performed with the gate 102 provided at this position, the flow direction of the molten resin is as shown by the arrow 102b, which has the advantage that the flow is natural and beautiful, and the surface of the molded pachinko machine front frame is evenly finished. .

Next, another manufacturing method for realizing the present invention will be described with reference to FIGS. 15A and 15B.

15A and 15B show an injection molding apparatus 91 different from the one described above. A feature of this injection molding apparatus 91 is that, as the mold 100, for example, five molds 100a to 100e are provided. And these molds 100a to 100e
moves sequentially on five stations 110a to 110e. In other words, five stations 11
The molds 0a to 110e are arranged in a circular shape, and the molds 100a to 100e are sequentially rotated on each station. If this injection molding device 91 is used, a gaming machine frame can be manufactured as follows.

For example, assume that a mold 100a on a station 110a is filled with molten resin. When filling the mold 100a is completed, the mold 100a
moves from station 110a to 110b. Accordingly, the mold 100 placed on the station 110b moves to the station 110c, the mold 100c placed on the station 110c moves to the station 110d, and so on. And station 110a
Next comes the mold 100e on top. According to mold 1
00e is filled with molten resin by the same process as described above.

In this way, each mold 100a to 100e
At station 110a, the cavity is filled with molten resin, and then moves to stations 110b to 110e in sequence. At this time, each mold is cooled by, for example, being sprayed with cooling water from the outside. And the mold is station 1
When it reaches 10e, the molten resin inside is solidified, and the front frame of the pachinko machine is completed. Therefore, when the mold reaches the station 110e, the solidified pachinko machine front frame can be taken out and filled immediately when the mold is moved to the station 110a. Therefore, this method improves the manufacturing efficiency of the product.

Note that the mold 100 may be a plurality of the same molds for forming the same pachinko machine front frame, or a mixture of molds for forming different front frames. In this way, by changing the type of mold, different types of pachinko machine front frames can be manufactured from the same injection molding machine.

Furthermore, the arrangement of the station is not limited to a circular shape, and may be arranged so that it moves on a predetermined closed curve.

[Effects of the Invention] The present invention can prevent deviations in the relative positional relationship between the batted ball firing means and the batted ball launching rail due to deviations in the relative positional relationship between the front frame and the game board mounting member, and the ball firing means can prevent the ball from being fired. The hit ball is guided by the ball launch rail as originally designed and is successfully launched. Furthermore, since the front frame is integrally molded from synthetic resin, it is possible to manufacture large quantities of the same front frame with improved dimensional accuracy.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view of a pachinko machine which is the object of the present invention. FIG. 2 is an external perspective view of one embodiment of the present invention. FIG. 3 is a sectional view taken along the line - of the front frame shown in FIG. 2. 4 and 5 are perspective views showing other embodiments of the present invention, with FIG. 4 showing a front side perspective view and FIG. 5 showing a back side perspective view. FIG. 6 shows a glass door frame 32, a metal frame 31, a batted ball supply tray 38, a front plate 36, a decorative plate 39, a ball tray 33, an operating handle 34, etc. attached to the front frame shown in FIGS. 4 and 5. This is an exploded view depicting the situation. FIG. 7 is a perspective view of the embodiment shown in FIGS. 4 and 5, viewed from the back side. This seventh
The figure shows a state in which the mechanism plate 70 is opened and closed. FIG. 8 is a perspective view showing still another embodiment of the invention. FIG. 9 is an external perspective view of an injection molding apparatus for manufacturing an embodiment of the present invention. 10A and 10B are illustrative views drawn to explain the operation and molding process of the injection molding apparatus shown in FIG. 9. FIGS. 11A to 11C are diagrams for explaining the process of molding a surface skin layer and an internal foam layer using a two-channel nozzle. FIG. 12 is a diagram for explaining injection molding using a three-channel nozzle. FIG. 13 is a partial cross-sectional view of a synthetic resin molded by injection molding. Figures 14A and 14B
The figure is a diagram for explaining the general shape of the cavity of the mold used for this manufacturing and the position of the gate.
15A and 15B are a schematic plan view and a side view of another injection molding apparatus. In the figure, 1 is a pachinko machine, 3 and 3' are the front frame of the pachinko machine, A and 3A are surface skin layers, and B and 3B are
3 is an internal foam layer, 301 is a window hole, 302 is a groove portion, 3
03 is a connection port for a ball tray, 304 is a through hole for an operation handle, 306 is a thermosetting resin plate, and 320 is a game board mounting member.

Claims (1)

[Scope of Claims] 1. A pinball game machine that is provided with a ball firing means that fires a ball based on the operation of an operating handle, the machine having a frame-like shape with a window hole provided approximately in the center. a front frame made of synthetic resin formed with a front frame made of synthetic resin; a batted ball firing rail for firing the batted ball fired by the batted ball firing means in a predetermined direction; a game board forming a game area in which the game board is attached, and a game board mounting member for attaching and fixing the game board, wherein the front frame and the game board mounting member are made of resin using a mold for resin molding. A pinball game machine, which is integrally molded during molding, wherein the ball launch means is provided on the front frame, and the ball launch rail is provided on the game board mounting member.