JP2008220744A - Game machine frame and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly productive game machine frame having a favorable retaining force relative to pins or fastening members by effectively using grass fiber-filled synthetic resin such as grass fiber-filled polypropylene resin; and its manufacturing method. <P>SOLUTION: A casing member 51 of a speaker unit 50, or an upper frame member 40 and a lower frame member constituting this machine frame F is formed of grass fiber-filled polypropylene resin formed by expanding grass fiber-filled polypropylene resin, which is formed by containing a plurality of glass fibers into polypropylene resin, using a springback phenomenon of the glass fiber. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a machine frame for various gaming machines such as a pachinko gaming machine, an arrangement ball gaming machine, and a sparrow ball gaming machine, and a method for manufacturing the same.

  Conventionally, as a machine frame (outer frame) used for, for example, a pachinko gaming machine, a machine frame manufactured by a frame manufacturing method for a ball game machine described in Patent Document 1 below has been proposed.

  The pair of left and right side frame plates, upper frame plate, and lower frame plate that constitute this machine frame in a rectangular frame shape are made of polyethylene resin, and a high-density skin layer is provided on each of the front and back surfaces of the low-density foam layer. As formed, it is formed by extrusion.

  And the said machine frame is comprised in a rectangular frame shape as mentioned above by driving a nail into each junction part between an upper frame board and a lower frame board, and a pair of left and right side frame boards.

  In the machine frame configured as described above, each nail extends from the skin layer on the surface side of the foam layer to the other skin layer via the foam layer in the upper frame plate, the lower frame plate, and the pair of left and right side frame plates. Then, it is driven into each of the aforementioned joints.

  In addition, a pachinko gaming machine is configured with the machine frame, the gaming machine main body (front frame and gaming board) and the front door (glass door) configured as described above, and the pachinko gaming machine is erected on the island of the hall. The nails are driven into the upper frame plate and lower frame plate of the machine frame through the wooden bars above and below the island, so that the pachinko gaming machine is erected on the island of the hall.

Here, since each skin layer is higher in density than the foamed layer, it is harder than the foamed layer. In other words, the foam layer is softer than each skin layer. This is to hold the nails driven into the upper frame plate and the lower frame plate as described above by the skin layers, and to drive the nails into the upper frame plate and the lower frame plate by the foam layer. This is because each nail is held easily.
Japanese Patent No. 3071407

  By the way, in the above machine frame, the upper frame plate, the lower frame plate and the pair of left and right side frame plates are formed of polyethylene resin as described above. There is no problem in terms of protection.

  However, as described above, the upper frame plate, the lower frame plate, and the pair of left and right side frame plates are extruded using polyethylene resin so as to have both high-density skin layers and low-density foam layers. Is done.

  For this reason, for example, there is a problem that the thickness ratio of the skin layer to the foamed layer is likely to vary. The foam layer is formed by foaming a polyethylene resin so as to ensure low density in the extrusion molding process. During this molding, in addition to irregularly forming a large number of large foam-like pores in the foam layer, there arises a problem that unnecessary large hollow portions and nests are also formed.

  Therefore, even if the nail is driven so as to straddle the skin layers on both the front and back sides of the foam layer as described above, the holding force of each skin layer with respect to the nail is caused by the above-described problem of variation in thickness and foaming. Due to defects inside the layer, it cannot be obtained sufficiently, and it tends to vary from top frame plate, lower frame plate or side frame plate. As a result, such an upper frame plate, lower frame plate, or side frame plate causes a problem that the machine frame lacks good productivity.

  Therefore, in order to cope with the above, the present invention effectively utilizes a synthetic resin containing glass fiber such as polypropylene resin containing glass fiber, has a good holding power to the nail or the fastening member, and has high productivity. An object is to provide a machine frame for a gaming machine and a method for manufacturing the same.

In solving the above problems, the gaming machine frame according to the present invention, according to claim 1,
A left frame member (20), a right frame member (30), an upper frame member (40) and a lower frame member (50);
The left end portion (41) and the right end portion (42) of the upper frame member are connected to the upper end portions (22, 32) of the left frame member and the right frame member, and the left end portion and the right end portion of the lower frame member are connected to the left side. By connecting to the lower end portions (23, 33) of the frame member and the right frame member, it is configured in a quadrangular ring shape.

  In the gaming machine frame, at least the upper frame member and the lower frame member among the left frame member, the right frame member, the upper frame member, and the lower frame member are made of glass fiber-containing polypropylene resin and glass fiber-containing polyamide resin. It is characterized by being formed by expanding any synthetic resin containing glass fiber so as to enclose innumerable pores by the springback phenomenon of the glass fiber that is the component contained therein.

  According to this, since the linear expansion coefficient of the synthetic resin containing glass fiber which is the material for forming the upper frame member and the lower frame member is small, the upper frame The change and deformation of the outer dimensions of the member and the lower frame member are small, and therefore the change and deformation of the outer dimensions of the machine frame are also small.

  Further, since the synthetic resin containing glass fiber, which is a material for forming the upper frame member and the lower frame member, contains glass fiber, the rigidity of the upper frame member, the lower frame member, and eventually the bending rigidity of the machine frame can be increased. it can. Therefore, the upper frame member and the lower frame member, and thus the machine frame can be thinned while ensuring the rigidity required for the upper frame member and the lower frame member.

  In addition, when the machine frame constructed as described above, the gaming machine main body and the gaming machine assembled with the front door, for example, a pachinko gaming machine is erected on the island of the hall, the machine frame of the pachinko gaming machine is In the standing state, it is interposed between the upper and lower bars on the island. At this time, the machine frame is placed on the lower bar by the lower frame member, and contacts the upper bar from the lower surface by the upper frame member. In such a state, a plurality of nails are driven into the upper frame member through the upper bar. Further, the other plurality of nails are driven into the lower frame member through the lower bar. In this way, the pachinko machine is erected on the island of the hall.

  However, as described above, the molten resin that has expanded due to the springback phenomenon of the glass fiber in the molding die uniformly encloses innumerable small pores. When cooled, unlike the foam layer of the upper frame plate, the lower frame plate, and the pair of left and right side frame plates that constitute the machine frame described in the prior art of this specification, it encloses countless small pores uniformly. An upper frame member and a lower frame member can be formed.

  For this reason, the upper frame member and the lower frame member can be easily driven in the above-described nail and have elasticity enough to hold the nail after being driven firmly. Therefore, in driving the nail into the upper frame member and the lower frame member, the nail can be easily driven into the upper frame member and the lower frame member. Therefore, when the nail is driven into the upper frame member and the lower frame member, it is not necessary to drill holes for each nail in advance on the upper frame member and the lower frame member. Further, as described above, since the upper frame member and the lower frame member are elastic enough to hold the driven nail firmly, the driven nail is securely held by the upper frame member and the lower frame member. Can be done.

  Further, the upper frame member and the lower frame member are formed of a synthetic resin containing glass fibers over the whole and uniformly enclose innumerable small pores, and are described in the prior art of this specification. In addition to irregularly forming a large number of large foam-like pores, such as an upper frame plate, a lower frame plate, and a pair of left and right side frame plates, an unnecessary hollow portion or nest is formed. There is no. Therefore, like the above-mentioned three-layer structure upper frame plate, lower frame plate and a pair of left and right side frame plates, without performing the troublesome work of driving nails through the foam layer so as to straddle both skin layers, It is only necessary to drive each nail into the upper frame member and the lower frame member, and the nail driving workability can be improved. It should be noted that the above-described effects can be realized substantially in the same manner even when a fastening member such as a screw is fastened instead of driving a nail.

According to the description of claim 2, the present invention provides the gaming machine frame according to claim 1,
In the synthetic resin containing glass fiber, the glass fiber has a length within the range of 5 (mm) to 20 (mm) in the total length and within the range of 30 (wt%) to 50 (wt%). It is characterized in that it is contained in the synthetic resin with a content, preferably 40 (% by weight).

  Thereby, the effect of the invention of claim 1 can be further improved.

According to a third aspect of the present invention, in the gaming machine frame according to the first or second aspect,
The lower frame member
A peripheral wall (51a) configured in a rectangular tube shape with an upper wall portion (α) and a lower wall portion (β) parallel to each other and a left wall portion (γ) and a right wall portion (δ) parallel to each other, and this A casing member (51) formed with the synthetic resin containing glass fiber so as to integrally have a bottom wall (51b) for closing the rear side opening of the peripheral wall, and a lid for closing the front side opening of the peripheral wall A casing (50a) comprising (52),
The speaker unit (50) is provided with a speaker (50b, 50c) provided in the casing and outputting sound through a lid,
A nail is driven into the left end portion of the lower wall portion (β) of the peripheral wall through the lower end portion (23) of the left frame member or the fastening member is fastened, and the peripheral wall is inserted through the lower end portion (33) of the right frame member. The casing member is connected to the lower end portions of the left frame member and the right frame member by driving a nail into the right end portion of the lower wall portion or fastening the fastening member.

  Thus, since the forming material of the casing member of the speaker unit is a synthetic resin containing glass fiber, it also serves as the lower frame member of the machine frame, and is similar to the invention according to claim 1 or 2. An effect can be achieved.

According to a fourth aspect of the present invention, in the gaming machine frame of the first or second aspect,
The left frame member is configured with a left frame plate made of metal,
The right frame member is configured with a right frame plate made of metal,
The upper frame member is configured with an upper frame plate made of a synthetic resin containing glass fiber,
The lower frame member is configured with a lower frame plate made of the glass fiber-containing synthetic resin,
Fastening members are fastened to the left end and right end of the upper frame plate via the upper ends of the left and right frame plates, respectively, and the lower frame plate is connected to the lower end of the left and right frame plates. It is characterized in that it is configured in a quadrangular annular shape by fastening fastening members to the left end portion and the right end portion, respectively.

  According to this, since the upper frame plate and the lower frame plate are formed so as to uniformly enclose innumerable small pores as described above, the upper frame plate and the lower frame plate are not tightened as described above. The fastening member can be easily fastened, and has elasticity enough to hold the fastened fastening member firmly. Therefore, when the fastening member is fastened to the upper frame plate and the lower frame plate, the fastening member can be easily fastened to the upper frame plate and the lower frame plate. Therefore, when the fastening member is fastened to the upper frame plate and the lower frame plate, it is not necessary to perform a pilot hole processing for the fastening member on the upper frame plate and the lower frame plate in advance. Further, as described above, the upper frame plate and the lower frame plate have elasticity that can hold the fastened fastening members firmly, so that the fastened fastening members are the upper frame plate and the lower frame. It can be held firmly by the plate. As a result, the operational effect of the invention according to claim 1 or 2 can be further improved.

Further, according to the fifth aspect of the present invention, in the gaming machine frame according to the third aspect,
The left frame member is configured with a left frame plate made of metal,
The right frame member is configured with a right frame plate made of metal,
The upper frame member is configured with an upper frame plate made of a synthetic resin containing glass fiber,
The fastening member is fastened to the left end portion of the lower wall portion of the peripheral wall via the lower end portion of the left frame plate, and the fastening member is fastened to the right end portion of the lower wall portion of the peripheral wall via the lower end portion of the right frame plate. By performing the attachment, the casing member is connected to each lower end portion of the left frame plate and the right frame plate.

  Even if comprised in this way, since the forming material of the casing member of a speaker unit is a synthetic resin containing glass fiber, while fulfilling the role as a lower frame member of a machine frame, the invention according to claim 4 Substantially similar effects can be achieved.

In the method for manufacturing a gaming machine frame according to the present invention, according to the sixth aspect,
An upper frame plate of a machine frame (F) for a gaming machine, in which a large number of resin pellets formed from a synthetic resin containing glass fiber is formed as a molten resin in a synthetic resin composed of either a polypropylene resin or a polyamide resin. (40) a molten resin injection step of injecting into a molding die for the lower frame plate (53);
A molten resin expansion step for expanding the molten resin in the molding die so as to enclose innumerable pores by the springback phenomenon of the glass fiber contained therein;
A molten resin cooling step for cooling the molten resin formed by enclosing the innumerable pores so as to be an upper frame plate or a lower frame plate;
The left frame member (20) and the metal right frame member (30) are prepared, and the left frame member, the right frame member, the upper frame plate, and the lower frame plate are configured to have a quadrangular annular shape. The upper end portions (22, 32) of the right frame member are connected to the left end portion (41) and the right end portion (42) of the upper frame plate, and the lower end portions (23, 33) of the left frame member and the right frame member are connected. A connecting step of connecting to the left end and the right end of the lower frame plate.

  In this way, a large number of resin pellets made of synthetic resin containing glass fibers are formed as a molten resin and injected into a molding die for the upper frame plate or the lower frame plate, and the molten resin in this molding die is The glass fiber is expanded so as to enclose innumerable pores by the glass fiber springback phenomenon, and the molten resin is cooled to become the upper frame plate or the lower frame plate, and the left frame member and Each upper end portion of the right frame member is connected to the left end portion and the right end portion of the upper frame plate, and each lower end portion of the left frame member and the right frame member is connected to the left end portion and the right end portion of the lower frame plate, The left frame member, the right frame member, the upper frame plate, and the lower frame plate are configured in a square ring shape. Thereby, the machine frame for gaming machines is manufactured.

  According to this, since the linear expansion coefficient of the synthetic resin containing glass fiber, which is the material for forming the upper frame plate or the lower frame plate, is small, the upper frame plate can be used even if there is a change in the season or the temperature environment of the gaming machine hall. Or the change and deformation | transformation of the external dimension of a lower frame board are few, Therefore, the change and deformation | transformation of an external dimension as a machine frame are also few.

  Further, since the synthetic resin containing glass fiber, which is a material for forming the upper frame plate or the lower frame plate, contains glass fiber, the rigidity of the upper frame plate or the lower frame plate, and thus the bending rigidity of the machine frame can be increased. it can. Accordingly, the upper frame plate or the lower frame plate, and hence the machine frame can be made thinner while ensuring the rigidity required for the upper frame plate or the lower frame plate.

  For example, when a pachinko machine assembled using the machine frame manufactured as described above is erected on the island of the hall, the machine frame is mounted on the lower bar of the island with the lower frame plate. The upper frame plate contacts the upper bar of the island from its lower surface. In such a state, a plurality of nails are driven into the upper frame plate and the lower frame plate through the upper bar and the lower bar.

  However, as described above, the molten resin that has expanded due to the springback phenomenon of the glass fiber in the molding die uniformly encloses innumerable small pores. When cooled, unlike the foam layer of the upper frame plate, the lower frame plate, and the pair of left and right side frame plates that constitute the machine frame described in the prior art of this specification, it encloses countless small pores uniformly. An upper frame plate or a lower frame plate can be formed.

  For this reason, the upper frame plate or the lower frame plate has elasticity enough to allow the nail to be driven easily and to hold the driven nail firmly. Therefore, when the nail is driven into the upper frame plate or the lower frame plate, the nail can be easily driven into the upper frame plate or the lower frame plate. Therefore, when the nail is driven into the upper frame plate or the lower frame plate, it is not necessary to prepare a hole for the nail in advance on the upper frame plate or the lower frame plate. Further, as described above, since the upper frame plate or the lower frame plate has elasticity enough to hold the driven nail firmly, the driven nail is firmly held by the upper frame plate or the lower frame plate. obtain.

  Further, as described above, the upper frame plate or the lower frame plate is formed by being expanded and cooled so as to enclose innumerable small pores by utilizing the springback phenomenon of glass fiber. Therefore, if the specifications of the upper frame plate or the lower frame plate are determined, the volume occupied by the synthetic resin containing glass fibers as the whole of the upper frame plate or the lower frame plate is reduced by innumerable pores. As a result, the upper frame plate or the lower frame plate, and thus the machine frame can be significantly reduced in weight.

  According to the above, by forming the upper frame plate or the lower frame plate using the synthetic resin containing glass fiber as described above, the upper frame plate or the lower frame synergistically combining high rigidity, thinning and light weight. The side frame plate can be formed, and thus the machine frame can be manufactured.

According to the seventh aspect of the present invention, in the method for manufacturing a gaming machine frame according to the sixth aspect,
Each resin pellet has a total length of glass fiber within a range of 5 (mm) to 20 (mm) and a content within a range of 30 (wt%) to 50 (wt%). , Preferably 40 (% by weight), and contained in the synthetic resin in a state of being arranged in parallel with each other,
In the molten resin injection step, each resin pellet is plasticized and kneaded, and the molten resin is formed so that each glass fiber is uniformly distributed therein and injected into a molding die.
In this way, the molten resin injected into the molding die is compressed in the molten resin expansion step, and then released from the compression by the springback phenomenon of each glass fiber. Until the shape of the frame plate is reached, it is inflated so as to enclose innumerable pores.

  Thereby, the effect of the invention of claim 6 can be further improved.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.

Hereinafter, each embodiment of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 shows a first embodiment in which the present invention is applied to a pachinko gaming machine. The pachinko gaming machine includes a machine frame F, a gaming machine main body B, and a front door D. As shown in FIG. 1, the gaming machine main body B includes a main body frame 10 and a game board (not shown) assembled to the main body frame 10, and the main body frame 10 The left side edge of the frame F is supported so as to be rotatable in the front-rear direction. The front door D is supported by the left side edge of the machine frame F through the left side edge of the main body frame 10 of the gaming machine main body B so as to be openable and closable in the front-rear direction.

  Next, the machine casing F constituting the main part of the present invention will be described in detail. The machine frame F has a left-side frame member 20, a right-side frame member 30, an upper-side frame member 40, and a lower-side frame member 50, and is configured in a square ring shape.

  The left frame member 20 is integrally formed as a frame plate with a metal such as aluminum so as to have the shape shown in FIG. Yes. The L-shaped plate portion 21 is configured by extending the strip-shaped rear wall portion 21b to the right from the rear edge portion of the strip-shaped left wall portion 21a.

  As shown in FIG. 3, the upper connecting part 22 has an upper wall part 22a and a rear wall part 22b, and the upper wall part 22a is connected to the left end part of the upper frame member 40 together with the rear wall part 22b. As described above, the L-shaped plate portion 21 extends forward and rightward from the upper end portions of the left wall portion 21a and the rear wall portion 21b so as to be orthogonal thereto. The rear wall portion 22b extends downward from the rear edge portion of the upper wall portion 22a so as to be orthogonal thereto. The upper wall portion 22a also serves as a hinge wall portion for hinge coupling with the upper end portion (see FIG. 1) of the left edge portion of the main body frame 10.

  As shown in FIG. 3, the lower connecting portion 23 includes a lower wall portion 23a, a left wall portion 23b, and an upper wall portion 23c, and the lower wall portion 23a together with the left wall portion 23b and the upper wall portion 23c. The left and right end portions of the L-shaped plate portion 21 extend from the lower end portions of the left wall portion 21a and the rear wall portion 21b to the front and right sides so as to be orthogonal to the left end portion of the speaker unit 50. . The left wall portion 23b extends upward from the left edge portion of the lower wall portion 23a so as to be orthogonal thereto. The upper wall portion 23c extends forward and right from the upper edge portion of the left wall portion 23b so as to be parallel to the lower wall portion 23a. It also serves as a hinge wall for hinge coupling with the lower end of the edge.

  The right frame member 30 is integrally formed as a frame plate with a metal such as aluminum so as to have the shape shown in FIG. 3 with the L-shaped plate portion 31, the upper connecting portion 32, and the lower connecting portion 33. Yes. As shown in FIG. 3, the L-shaped plate portion 31 is configured by extending the strip-shaped rear wall portion 31b leftward from the rear edge portion of the strip-shaped right wall portion 31a in an L-shape.

  The upper connecting part 32 has an upper wall part 32a, a front wall part 32b, and a rear wall part 32c. The upper wall part 32a is attached to the right end part of the upper frame member 40 together with the front wall part 32b and the rear wall part 32c. It extends toward the left from the upper end of the belt-like right wall 31a of the L-shaped plate 31 so as to be connected. The front wall portion 32b extends downward from the front edge portion of the upper wall portion 32a so as to be orthogonal thereto. Further, the rear wall portion 32c extends downward from the rear edge portion of the upper wall portion 32a so as to be orthogonal thereto.

  The lower connecting portion 33 is extended in a plate shape to the right so as to be orthogonal to the lower end portion of the L-shaped plate portion 31 so as to be connected to the right end portion of the speaker unit 50.

  The upper frame member 40 is made of a glass fiber-containing polypropylene resin (hereinafter also referred to as GFPP resin) formed by mixing a plurality of glass fibers into a polypropylene resin, and a plurality of glass fibers are spring-backed by injection molding as will be described later. It is formed as a frame plate with polypropylene resin containing glass fiber (GFPP resin) that is expanded by utilizing the phenomenon.

  In the upper frame member 40 formed in this manner, the left end portion 41 is connected to the upper connection portion 22 of the left frame member 20 as shown in FIGS. 1 and 2. Specifically, the left end portion 41 of the upper frame member 40 is brought into contact with the upper wall portion 22a and the rear wall portion 22b of the upper connection portion 22 of the left frame member 20 from the inside thereof, and each screw (not shown) is attached. The left end portion 41 of the upper frame member 40 is connected to the upper connection portion 22 of the left frame member 20 by being fastened to the left end portion 41 of the upper frame member 40 through each through hole portion of the upper wall portion 22a. . In the present embodiment, the left end portion 41 and the right end portion 42 of the upper frame member 40 are formed somewhat smaller in width and thickness than the upper frame member 40.

  Moreover, the right end part 42 of the upper side frame member 40 is connected with the upper side connection part 32 of the right side frame member 30, as FIG. 1-3 shows. Specifically, the right end portion 42 of the upper frame member 40 is brought into contact with the inner surfaces of the upper wall portion 32a, the front wall portion 32b, and the rear wall portion 32c of the upper connection portion 32 of the right frame member 30, and each screw ( (Not shown) is fastened to the right end portion 42 of the upper frame member 40 through each through-hole portion of the upper wall portion 32 a, so that the right end portion 42 of the upper frame member 40 becomes the upper connection portion 32 of the right frame member 30. It is connected.

  The lower frame member 50 is composed of a speaker unit (hereinafter also referred to as a speaker unit 50). As can be seen from FIGS. 1 to 3, the speaker unit 50 has left and right speakers 50b and 50c in a casing 50a. It is configured to support. The casing 50 a is configured by a rectangular parallelepiped casing member 51 and a lid 52 assembled to the opening of the rectangular parallelepiped casing member 51.

  The rectangular parallelepiped casing member 51 has a peripheral wall 51a and a bottom wall 51b, and the rectangular cylindrical peripheral wall 51a has upper and lower parallel wall portions α and β parallel to each other and upper and lower parallel wall portions γ and δ parallel to each other. It is configured in a rectangular tube shape and in a longitudinal shape in the left-right direction. The bottom wall 51b is formed integrally with the rear end opening of the square cylindrical peripheral wall 51a and closes the rear end opening. In the present embodiment, the lower wall portion β has an extending portion β1 extending rearward of the bottom wall 51b (see FIG. 3). In addition, this extension part (beta) 1 is extended in the wall shape to the back from the whole left-right direction of the lower wall part (beta).

  The rectangular parallelepiped casing member 51 has a pair of partition walls 51 c, and the pair of partition walls 51 c are inserted into the rectangular parallelepiped casing member 51 at the center in the left-right direction. As a result, the pair of partition walls 51c form left and right side storage chambers 51d and 51e that house the interior of the rectangular parallelepiped casing member 51 while isolating the speakers 50b and 50c.

  The rectangular parallelepiped casing member 51 includes four support cylinders a for the speaker 50b, four support cylinders b for the speaker 50c, and eight support cylinders c for the lid 52. Each support cylinder a is formed to project forward from the bottom wall 51b at the position shown in FIG. 3 in the left storage chamber 51d. Each support cylinder b is formed to project forward from the bottom wall 51b at the position shown in FIG. Each support cylinder c is formed to project forward from the bottom wall 51b at the position shown in FIG. 3 in the left and right side storage chambers 51d and 51e.

  As described above, the rectangular parallelepiped casing member 51 includes a plurality of like the upper frame member 40 so as to constitute the peripheral wall 51a, the bottom wall 51b, the partition walls 51c, and the support cylinders a, b, and c. A GFPP resin obtained by mixing a glass fiber into a polypropylene resin is expanded by injection molding as will be described later using the springback phenomenon of a plurality of glass fibers.

  The left speaker 50b is accommodated in the left storage chamber 51d, and the left speaker 50b passes each screw (not shown) through the outer peripheral edge of the cone-shaped opening d and is fastened to the four support cylinders a. Therefore, it is supported by these support cylinders a. Thus, the left speaker 50b outputs sound from the cone-shaped opening d toward the front in the left storage chamber 51d.

  The right speaker 50c is accommodated in the right accommodation chamber 51e, and the right speaker 50c passes each screw (not shown) through the outer peripheral edge of the cone-shaped opening f and is fastened to the four support cylinders b. Therefore, it is supported by these support cylinders b. Thereby, the right speaker 50c outputs sound from the cone-shaped opening f toward the front in the right storage chamber 51e.

  The lid 52 is assembled to the opening so as to close the opening of the rectangular parallelepiped casing member 51. Specifically, the lid 52 is coaxially abutted with each supporting cylinder c at each cylindrical portion protruding to the back side thereof, and passes through each supporting cylinder c from the bottom wall 51b side to each cylindrical portion. By fastening each screw (not shown), it is assembled to the opening of the rectangular parallelepiped casing member 51. In the present embodiment, the lid 52 is opposed to the respective cone-shaped openings of the left and right speakers 50b and 50c at the left and right mesh portions 52a and 52b. Thereby, the left and right both-side speakers 50b and 50c output the sound forward through the left and right both-side mesh portions 52a and 52b.

  In the speaker unit 50 configured as described above, the square cylindrical peripheral wall 51a has the lower wall portion 23a and the upper wall of the lower connection portion 23 of the left frame member 20 on the left side thereof as can be seen from FIGS. It is fitted between the portions 23c, and a plurality of screws (not shown) are fastened to the lower left portion of the rectangular cylindrical peripheral wall 51a through the lower wall portion 23a, so that the lower connecting portion 23 is attached to the left frame member 20. It is connected.

  Moreover, the said square cylindrical surrounding wall 51a is mounted on the lower side connection part 33 of the right side frame member 30 in the right side part so that FIG. A plurality of screws (not shown) are connected to the lower connection portion 33 of the right frame member 30 by fastening them to the lower right portion of the square cylindrical peripheral wall 51a.

  As described above, the speaker unit 50 is assembled to the left frame member 20 and the right frame member 30 as the lower frame member of the machine frame F under the connection.

  Next, a method for manufacturing the machine casing F configured as described above will be described.

  Prepare a large number of resin pellets. These resin pellets are formed into a granular shape with a GFPP resin. The GFPP resin has glass fibers having a length within the range of 5 (mm) to 20 (mm) in total length, and the number of resin pellets that is 40 (% by weight) of the entire resin pellet. They are arranged in parallel and contained in polypropylene resin. Thereby, each glass fiber can exhibit a so-called spring back phenomenon satisfactorily in an injection molding process described later.

  Moreover, the left side frame member 20, the right side frame member 30, the left and right both-side speakers 50b and 50c, and the lid 52 are prepared.

  After preparing a large number of resin pellets as described above, these resin pellets are charged into the injection port of the injection molding machine, and the multiple resin pellets charged into the charging port are plasticized inside the injection molding machine. And knead. Thereby, the many resin pellets are formed as a molten resin in which the many glass fibers are uniformly distributed in the injection molding machine. Thereby, many glass fibers are maintained in the state which is easy to exhibit the favorable spring back phenomenon mentioned above favorably.

  After forming the molten resin in this way, a molding die (not shown) for the upper frame member 40 is set inside the injection molding machine. Next, the molten resin is injected by the injection molding machine into a molding die (not shown) for the upper frame member 40 set therein. However, the molding die is configured with a fixed die and a movable die so as to mold the upper frame member 40, and the molding die can be moved so as to adjust the distance between the movable die and the fixed die. It has become.

  Therefore, when the molten resin is injected into the molding die for the upper frame member 40 as described above, the hollow portion formed between the fixed die and the movable die in the molding die is the upper frame member 40. The volume is set to be thinner than the thickness of the molded product.

  Thus, when the injection molding machine injects the molten resin so as to fill the hollow portion between the fixed mold and the movable mold of the molding die for the upper frame member 40, the molten resin is fixed. It will be in the state compressed in the hollow part between a type | mold and a movement type | mold, and each glass fiber contained in the said molten resin will be in the state crushed in the said molten resin.

  After that, when the movable mold of the molding die moves away from the fixed mold under the operation of the injection molding machine, the volume between the movable mold and the fixed mold corresponds to the movement of the movable mold. And increase. In the process of increasing the volume between the movable mold and the fixed mold, the springback phenomenon of each glass fiber is promoted, and each glass fiber returns to its original shape by its elastic restoring force.

  Along with this, the molten resin in the molding die for the upper frame member 40 expands, and innumerable small pores are uniformly formed inside the molten resin. Thereby, the volume of the molten resin in the molding die expanded as described above is larger than the volume before the expansion. This means that the molded product is larger and lighter than the volume before the expansion. Note that the volume between the movable mold and the fixed mold described above increases to a volume corresponding to the molded product.

  Thereafter, when the molded product is cooled, the molded product is taken out from the interior of the molding die as a molded product to be the upper frame member 40. Thereby, manufacture of the upper side frame member 40 is complete | finished.

  After the manufacture of the upper frame member 40 is thus completed, a molding die (not shown) for the rectangular parallelepiped casing member 51 is set inside the injection molding machine. Next, the molten resin is injected into the molding die for the rectangular parallelepiped casing member 51 by the injection molding machine.

  However, the molding die for the rectangular parallelepiped casing member 51 is configured by a fixed mold and a movable mold for the rectangular parallelepiped casing member 51 so as to mold the rectangular parallelepiped casing member 51. The molding die is movable so that the movable die for the rectangular parallelepiped casing member 51 is adjusted with respect to the fixed die.

  In the molding die for the rectangular parallelepiped casing member 51, each cylindrical hollow portion has a shape corresponding to each of the supporting cylinders a, b and c of the rectangular parallelepiped casing member 51, and each supporting cylinder a, b. And c are formed between the fixed die for the rectangular parallelepiped casing member 51 and the movable die at a portion corresponding to c, and each plate-like hollow portion corresponds to each partition 51c of the rectangular parallelepiped casing member 51. Therefore, it is formed between the fixed die for the rectangular parallelepiped casing member 51 and the movable die at the portion corresponding to each partition wall 51c.

  Under such a premise, a molded product corresponding to the rectangular parallelepiped casing member 51 is injection-molded under the operation of the injection molding machine, like the upper frame member 40. Here, the support cylinders a, b, and c and the partition walls 51c are formed as shown in FIG. Thereby, manufacture of the rectangular parallelepiped casing member 51 is completed.

  As described above, the upper frame member 40 and the rectangular parallelepiped casing member 51 manufactured as described above are made of a plurality of glass fibers by using the above-described injection molding of a GFPP resin obtained by mixing a plurality of glass fibers in a polypropylene resin. It is formed by expanding using the spring back phenomenon.

  After manufacturing the upper frame member 40 and the rectangular parallelepiped casing member 51 in this way, the left end portion 41 and the right end portion 42 of the upper frame member 40 are connected to the upper connection portion 22 of the left frame member 20 prepared as described above and Each is connected to the upper connecting portion 32 of the right frame member 30 as described above.

  In this connection, each screw is fastened to the left end portion 41 of the upper frame member 40 through each through-hole portion of the upper wall portion 22a of the upper connection portion 22 of the left frame member 20, and the upper connection of the right frame member 30. It is fastened to the right end portion 42 of the upper frame member 40 through each through hole portion of the upper wall portion 32a of the portion 32.

  Next, the left and right side speakers 50b and 50c prepared as described above are accommodated in the left and right side accommodation chambers 51d and 51e of the rectangular parallelepiped casing member 51 and supported by the support cylinders a and b as described above. Thereafter, the lid 52 prepared as described above is assembled to the opening of the rectangular parallelepiped casing member 51. Thereby, the assembly of the speaker unit 50 is completed.

  Thereafter, in the speaker unit 50 assembled in this manner, the left end portion and the right end portion of the rectangular parallelepiped casing member 51 are connected to the lower side connection portion 23 of the left side frame member 20 and the lower side connection portion of the right side frame member 30 as described above. It connects with the part 33, respectively.

  In this connection, the right end portion of the rectangular parallelepiped casing member 51 is fitted between the lower wall portion 23a and the upper wall portion 23c of the lower connection portion 23 of the left frame member 20, and a plurality of screws connect the lower wall portion 23a. While being fastened to the lower left part of the through-hole square cylindrical peripheral wall 51a, the right end portion of the rectangular parallelepiped casing member 51 is placed on the lower connecting portion 33 of the right frame member 30, and a plurality of screws are provided on the lower side. It is fastened to the lower right side of the square cylindrical peripheral wall 51a through the connecting portion 33. Thus, the manufacture of the machine casing F is completed.

  After the machine frame F is manufactured in this way, the gaming machine main body B is moved back and forth on the upper walls 22a and 23c of the left frame member 20 of the machine frame F at the upper end and lower end of the left side edge of the main body frame 10. It is supported so that it can be opened and closed in the direction. Next, the front door D is supported by the left side edge of the machine frame F through the left side edge of the main body frame 10 of the gaming machine main body B so as to be openable and closable in the front-rear direction. This completes the manufacture of the pachinko gaming machine.

  The pachinko machine manufactured as described above is erected on the island of the hall as follows. That is, the machine frame F of the pachinko gaming machine is interposed between the upper and lower support bars (not shown) that have been installed on the island in a standing state. At this time, the machine frame F is placed on the lower bar by the speaker unit 50 as the lower frame member, and abuts on the upper bar from the lower surface by the upper frame member 40.

  In such a state, a plurality of nails are driven into portions other than the left and right end portions 41 and 42 of the upper frame member 40 through the upper bar. In addition, a plurality of other nails are driven through the lower bar into the extended portion β1 of the lower wall portion β of the rectangular cylindrical peripheral wall 51a of the speaker unit 50. As a result, the establishment of the pachinko gaming machine hall island is completed.

Hereinafter, the effect of this embodiment by having manufactured the machine casing F as mentioned above is demonstrated.
(1) In the machine frame described in the prior art of this specification, the polyethylene resin which is a material for forming the foamed layer has a large linear expansion coefficient. For this reason, the machine frame having the foamed layer undergoes changes and deformations in the outer dimensions in accordance with the season and changes in the temperature environment of the gaming machine hall.

On the other hand, the linear expansion coefficient of the GFPP resin, which is a material for forming the upper frame member 40 and the casing member 51 in this embodiment, is small. For this reason, even if there is a change in the temperature environment of the hall or the hall of the gaming machine, there is little change or deformation of the outer dimensions of the upper frame member 40 and the casing member 51. There are few.
(2) Since the GFPP resin, which is a material for forming the upper frame member 40 and the casing member 51, contains glass fibers, the upper frame member 40 and the casing member 51, and thus the rigidity such as the bending rigidity of the machine frame F can be increased. . Therefore, it is possible to reduce the thickness of each of the upper frame member 40 and the casing member 51 while ensuring the rigidity required for the upper frame member 40 and the casing member 51.

  Further, the upper frame member 40 and the casing member 51 are formed so as to be inflated and cooled so as to enclose innumerable small pores using the springback phenomenon of glass fiber in the above-described injection molding process. . For this reason, if the specifications of the upper frame member 40 and the casing member 51 are determined as described above, the volume occupied by the GFPP resin as a whole of the upper frame member 40 and the casing member 51 is reduced by innumerable pores. To do. Therefore, the upper frame member 40, the casing member 51, and thus the machine frame F can be significantly reduced in weight.

According to the above, by molding the upper frame member 40 and the casing member 51 as described above using the GFPP resin, the upper frame member 40 and the casing member 51 that synergistically combine high rigidity, thickness reduction, and weight reduction. As a result, the machine casing F can be manufactured.
(3) As described above, the molten resin that has expanded due to the glass fiber spring-back phenomenon in each of the molding dies uniformly contains innumerable small pores. If the molten resin is cooled, the upper frame member 40 and the casing member 51 that uniformly include innumerable small pores can be formed unlike the foam layer of the machine frame described in the prior art of this specification. .

  For this reason, the upper frame member 40 and the casing member 51 can easily fasten the screws, and have sufficient elasticity to hold the fastened screws firmly.

  Therefore, when each screw is passed through each through hole portion of the upper wall portion 22a of the upper connecting portion 22 in the left frame member 20 and fastened to the left end portion 41 of the upper frame member 40, each screw is also attached to the right side. When screws are fastened to the right end portion 42 of the upper frame member 40 through the through-hole portions of the upper wall portion 32a of the upper connection portion 32 of the frame member 30, the screws are also connected to the left end portion 41 and the right end portion 42 of the upper frame member 40. Can be easily fastened.

  Further, when driving each nail into a portion other than the left end portion 41 and the right end portion 42 of the upper frame member 40 through the upper bar of the hole, each nail is passed through the lower bar of the hole. 50, each nail is placed in a portion other than the left end 41 and the right end 42 of the upper frame member 40 and the lower wall of the rectangular cylindrical peripheral wall 51a. It can be easily driven into the extended part β1 of the part β.

  Therefore, before each nail is driven into the extended portion β1 of the lower wall portion β of the upper frame member 40 and the rectangular cylindrical peripheral wall 51a as described above, the lower wall portion β of the upper frame member 40 and the rectangular cylindrical peripheral wall 51a is provided in advance. There is no need to drill each nail pilot hole in the extended portion β1.

  Further, as described above, the extended portion β1 of the upper frame member 40 and the lower wall portion β of the rectangular cylindrical peripheral wall 51a has elasticity that can hold the driven nails firmly. Can be firmly held by the upper frame member 40 and the extended part β1 of the lower wall part β of the square cylindrical peripheral wall 51a.

Innumerable small pores are made uniform in the upper frame member 40 and the rectangular cylindrical peripheral wall 51a as described above. Accordingly, the holding force of the extended portion β1 of the lower wall portion β of the upper frame member 40 and the rectangular cylindrical peripheral wall 51a for each nail driven in as described above is the lower wall of the upper frame member 40 and the rectangular cylindrical peripheral wall 51a. It can be ensured uniformly and satisfactorily over the entire extended part β1 of the part β.
(4) Moreover, although the glass fiber contained in the above-mentioned GFPP resin was 40 (wt%), the content of this glass fiber is not limited to 40 (wt%), and the entire resin pellet The content may be within the range of 30 (wt%) to 50 (wt%).

Therefore, if the content of the glass fiber in the GFPP resin is adjusted by an amount within the range of 30 (wt%) to 50 (wt%), the glass in the molten resin in each molding die described above is adjusted. The spring back phenomenon of the fiber can be adjusted, and as a result, the degree of expansion of the molten resin can be adjusted. Therefore, it is possible to adjust the characteristics such as the number of pores of the upper frame member 40 and the casing member 51 in accordance with the adjustment of the degree of expansion of the molten resin. This means that, for example, the rigidity of the upper frame member 40 and the casing member 51 can be adjusted, in other words, the softness can be adjusted.
(5) Moreover, the upper frame member 40 and the casing member 51 are formed using the above-described molding die by the above-described injection molding with a GFPP resin over the whole. Accordingly, the upper frame member 40 and the casing member 51 are large foam-like pores like the upper frame plate, the lower frame plate, and the pair of left and right side frame plates described in the prior art of this specification. In addition to irregularly forming a large number, unnecessary hollow portions and nests are not formed.

  Therefore, like the upper frame plate, the lower frame plate and the pair of left and right side frame plates of the three-layer structure, the nail is not subjected to the troublesome work of driving the nail through the foam layer so as to straddle both skin layers. Is simply driven into the bottom wall portion of the upper frame member 40 or the casing member 51, and the nail driving workability can be improved.

Further, the upper frame member 40 and the casing member 51 are molded by expansion and cooling of the molten resin in each molding die in the injection molding process. Therefore, the upper frame member 40 and the casing member 51 can be formed uniformly without variation unlike the case of extrusion molding. This means that the upper frame member 40 and the casing member 51 can be formed as a homogeneous substrate.
(6) Since the upper frame member 40 and the casing member 51 are formed by expanding the GFPP resin so as to have innumerable pores as described above, the sound absorbing effect of the upper frame member 40 and the casing member 51 is formed. The vibration control effect and heat insulation effect are improved. This means that the sound absorption effect, the vibration control effect, and the heat insulation effect of the machine frame F and eventually the pachinko gaming machine are improved.
(7) The polypropylene resin contained in the forming material of the upper frame member 40 and the casing member 51 is different from the polyethylene resin which is the forming material of the foam layer described in the prior art of this specification, and stress cracks caused by the synthetic liquid detergent Therefore, even if the upper frame member 40 and the casing member 51 are washed with a synthetic liquid detergent, the upper frame member 40 and the casing member 51 do not generate stress cracks.
(8) Moreover, since the upper side frame member 40 and the casing member 51 are formed with the GFPP resin as mentioned above, there is no water absorption. For this reason, the upper frame member 40 and the casing member 51 are not expanded due to moisture.
(9) Since the upper frame member 40 and the casing member 51 are made of GFPP resin as described above, the upper frame member 40 and the casing member 51 can be recycled.
(10) Since the lower wall portion β of the speaker unit 50 is also used as the original lower frame plate of the machine frame F as described above, the above-described various functions and effects can be achieved while reducing costs. obtain.
(Second Embodiment)
FIG. 4 shows a main part of the second embodiment of the present invention. In the second embodiment, the machine frame F described in the first embodiment employs a lower frame plate 53 and a wooden front plate 60 in place of the speaker unit 50.

  The lower frame plate 53 is formed of a GFPP resin that is a material for forming the upper frame member 40 described in the first embodiment. The lower frame plate 53 is connected to the lower wall portion 23a of the lower connection portion 23 of the left frame member 20 described in the first embodiment at the left end portion 53a, and at the right end portion 53b. These are connected to the lower connecting portion 33 of the right frame member 30 described in the first embodiment. Specifically, each screw is fastened to the left end portion 53a of the lower frame plate 53 through each through-hole portion of the lower wall portion 23a of the left frame member 20, and the lower connection portion 33 of the right frame member 30 is fixed. The lower frame plate 53 is connected to the lower connection portions of the left frame member 20 and the right frame member 30 by fastening to the right end portion 53b of the lower frame plate 53 through the respective through-hole portions.

  Here, the lower frame plate 53 is manufactured by injection molding similar to the upper frame member 40 described in the first embodiment, using the lower frame plate 53 molding die (not shown). Manufactured.

  Further, the front plate 60 is bonded to the lower end portions of the L-shaped plate portions of the left frame member 20 and the right frame member 30 and the front edge portion of the lower frame plate 53 at both ends and the lower edge portion of the back surface thereof. So it is glued. Other configurations are the same as those in the first embodiment.

  In the second embodiment configured as described above, the pachinko gaming machine is erected with respect to the island of the hall as follows. That is, as in the first embodiment, the machine frame F of the pachinko gaming machine is interposed between the upper and lower support bars (not shown) installed on the island in a standing state. At this time, the machine frame F is placed on the lower bar by the lower frame plate 53, and comes into contact with the upper bar from the lower surface by the upper frame member 40.

  In such a state, each nail is driven into a portion of the upper frame member 40 other than the left and right end portions 41 and 42 through the upper bar and is driven into the lower frame plate 53 through the lower bar. As a result, the establishment of the pachinko gaming machine hall island is completed.

  Also by this, the same operational effects as described in the first embodiment can be achieved except for the operational effects due to the adoption of the speaker unit 50.

In carrying out the present invention, the following various modifications are possible without being limited to the above embodiments.
(1) In carrying out the present invention, a glass fiber-containing polyamide resin may be employed instead of the glass fiber-containing polypropylene resin. In addition, the said polyamide resin containing glass fiber is comprised similarly to the polypropylene resin containing glass fiber described in the said embodiment. Moreover, you may grasp | ascertain the polypropylene resin containing glass fiber or the polyamide resin containing glass fiber as a synthetic resin containing glass fiber.
(2) In carrying out the present invention, the fastening of screws to the upper frame member 40, the extended portion β1 of the lower wall portion β of the casing member 51 of the speaker unit 50 or the lower frame plate 53 is not limited to this. In general, the fastening may be performed by fastening members such as bolts and nuts.
(3) In carrying out the present invention, the upper frame member 40 and the lower frame member 50 are not limited to the casing member 51 of the speaker unit, but the left frame member 20 and the right frame member 30 are also described in the above embodiment. You may make it form with the synthetic resin containing glass fiber.
(4) In carrying out the present invention, each L-shaped plate portion of the left frame member 20 and the right frame member 30 may be flat.
(5) The present invention is not limited to pachinko gaming machines but may be applied to arrange ball gaming machines, sparrow ball gaming machines, and other various gaming machines.

1 is a perspective view showing a first embodiment of a pachinko gaming machine to which the present invention is applied in an open state of a front door and a gaming machine main body. It is a perspective view of the machine casing of FIG. It is a disassembled perspective view of the machine casing of FIG. It is a perspective view which shows the principal part of 2nd Embodiment of this invention.

Explanation of symbols

20 ... Left side frame member, 22, 32 ... Upper connection part, 23, 33 ... Lower connection part,
30 ... right side frame member, 40 ... upper side frame member, 41 ... left end part, 42 ... right end part,
50 ... lower frame member, speaker unit, 50a ... casing,
50b, 50c ... speaker, 51 ... casing member, 51a ... peripheral wall, 51b ... bottom wall,
52: Lid, 53: Lower frame plate, α: Upper wall portion, β: Lower wall portion, F: Machine frame.

Claims (7)

The left side frame member, the right side frame member, the upper side frame member, and the lower side frame member are provided.
The left and right end portions of the upper frame member are connected to the respective upper end portions of the left and right frame members, and the left and right end portions of the lower frame member are connected to the left and right frame members. By connecting to each lower end of the member, in the machine frame configured in a square ring,
Of the left frame member, the right frame member, the upper frame member, and the lower frame member, at least the upper frame member and the lower frame member are either glass fiber-containing polypropylene resin or glass fiber-containing polyamide resin. A machine frame for a gaming machine, which is formed by expanding a synthetic resin containing glass fiber so as to enclose innumerable pores by a springback phenomenon of glass fiber that is a component of the synthetic resin.   In the synthetic resin containing glass fiber, the glass fiber has a length within a range of 5 (mm) to 20 (mm) in total length and within a range of 30 (wt%) to 50 (wt%). The machine frame according to claim 1, wherein the machine frame is contained in the synthetic resin in a number of 40, preferably 40 (wt%). The lower frame member is
The peripheral wall formed in the shape of a square cylinder with the upper wall part and the lower wall part parallel to each other, and the left wall part and the right wall part parallel to each other, and the bottom wall that closes the rear opening of the peripheral wall are integrated. A casing member made of a synthetic resin containing glass fiber so as to have a casing made of a lid that closes the front opening of the peripheral wall;
The speaker unit is provided with a speaker that outputs sound through the lid provided in the casing.
A nail is driven into the left end portion of the lower wall portion of the peripheral wall through the lower end portion of the left frame member or the fastening member is fastened, and the right end portion of the lower wall portion of the peripheral wall is inserted through the lower end portion of the right frame member. 3. The casing member is connected to each lower end portion of the left frame member and the right frame member by driving a nail into the plate or fastening a fastening member. Machine frame for gaming machines. The left frame member is configured with a left frame plate made of metal,
The right frame member is configured with a right frame plate made of metal,
The upper frame member is configured with an upper frame plate made of the synthetic resin containing glass fiber,
The lower frame member is configured with a lower frame plate made of the synthetic resin containing glass fiber,
The fastening members are fastened to the left end and the right end of the upper frame plate through the upper ends of the left frame plate and the right frame plate, respectively, and the lower end portions of the left frame plate and the right frame plate are respectively attached. 3. A machine frame for a gaming machine according to claim 1, wherein the lower frame plate is formed into a quadrangular ring shape by fastening fastening members to the left end and the right end of the lower frame plate, respectively. . The left frame member is configured with a left frame plate made of metal,
The right frame member is configured with a right frame plate made of metal,
The upper frame member is configured with an upper frame plate made of the synthetic resin containing glass fiber,
The fastening member is fastened to the left end portion of the lower wall portion of the peripheral wall via the lower end portion of the left frame plate, and the fastening member is attached to the right end portion of the lower wall portion of the peripheral wall via the lower end portion of the right frame plate. The machine frame according to claim 3, wherein the casing member is connected to each of the lower end portions of the left frame plate and the right frame plate by tightening. A large number of resin pellets formed from a synthetic resin containing glass fibers in a synthetic resin composed of either a polypropylene resin or a polyamide resin are formed as a molten resin to be used for an upper frame plate or a lower frame of a machine frame for gaming machines. A molten resin injection step of injecting into the side frame plate molding mold,
A molten resin expansion step of expanding the molten resin in the molding die so as to enclose innumerable pores by the springback phenomenon of the glass fiber contained therein;
A molten resin cooling step for cooling the molten resin formed by enclosing the innumerable pores so as to be the upper frame plate or the lower frame plate;
A left side frame member and a right side frame member made of metal are prepared, and the left side frame member and the right side frame member are configured so that the left side frame member, the right side frame member, the upper side frame plate, and the lower side frame plate are formed in a square ring shape. Connecting each upper end of the frame member to the left end and right end of the upper frame plate, and connecting each lower end of the left frame member and right frame member to the left end and right end of the lower frame plate A machine frame manufacturing method comprising a process. Each resin pellet has the length of the glass fiber within a range of 5 (mm) to 20 (mm) in total length, and within a range of 30 (wt%) to 50 (wt%). The content, preferably 40 (% by weight), is contained in the synthetic resin in a state of being arranged in parallel with each other,
In the molten resin injection step, the resin pellets are plasticized and kneaded, and the molten resin is formed so that the glass fibers are uniformly distributed therein and injected into the molding die,
In this way, the molten resin injected into the molding die is compressed in the molten resin expansion step and then released from the compression. The method of manufacturing a machine frame for a gaming machine according to claim 6, wherein the infinite number of pores are inflated so as to enclose them until the shape of the upper frame plate or the lower frame plate is obtained.

Images