JP5374790B2 - Method of manufacturing a ball cage for a gaming machine and a ball cage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing the pinball hammer of a game machine which can easily manufacture the pinball hammer, which is excellent in the discharge direction of a ball and the stability of a fly distance, and to provide the pinball hammer. <P>SOLUTION: In the method of manufacturing the pinball hammer in which a spring 5, which strikes a ball, is mounted on the hammer point pin 3 of a pinball hammer body 1, the pinball hammer body 1 is actuated according to the manipulated variable of an operation handle, and thereby the spring 5, which interlocks with the pinball hammer body 1, strikes and discharges the ball, after inserting the spring 5, in which coiling is carried out, in the hammer point pin 3 of the pinball hammer body 1, the tip of spring 5 is grinding-processed to a flat surface by a grinding grindstone 8. At this time, in the method of manufacturing the pinball hammer, grinding processing is performed with the axis P of the hammer point pin 3 perpendicular to the grinding surface 81 of the grinding grindstone 8. Further, the pinball hammer is manufactured by this manufacturing method. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a method for manufacturing a ball cage for firing a ball into a game area of a pachinko machine, and a ball cage.

  A pachinko machine, which is a gaming machine, is equipped with a ball launcher, and this ball launcher has a ball cage for launching a ball into the game area. In the production of the ball cage, conventionally, a spring whose both end surfaces are flattened by grinding is pressed into the tip pin of the lathe body which has been lathe-pressed and pressed and attached.

  In the above prior art, the end face processing of the spring is performed as follows. First, a surface grinding jig is prepared in which a large number of holes corresponding to the outer diameter of the spring are formed in an iron plate that is slightly thinner than the free length of the spring. This jig is placed on a magnetic processing table of a grinding machine, and the end of the spring is inserted into the hole with the tip of the spring facing downward, and the end of the winding end side of the spring is ground flatly. Next, the spring was inverted and inserted into the hole, and the tip end portion of the spring was ground flat. However, when the spring ground in this way is mounted on the tip pin, the tip surface of the ground spring is not coincident with the ball striking surface imaginary with respect to the tip pin axis, that is, the spring tip surface. There was a problem that the firing direction of the ball varied due to the ball cage. In addition, there is a problem that the tip surface of the spring does not coincide with the position of the ball striking surface imagined with respect to the axis of the tip pin, that is, the position of the spring tip surface varies and the flying distance of the ball varies due to the bullet ball. there were.

  In order to solve the problems of the prior art, Patent Document 1 discloses that a tip pin cutting tool and a spring holder for launching a pachinko ball are attached to a tool post of an NC lathe, and the tool post is moved after cutting the tip pin. The center of the spring holder and the machined tip pin can be made to coincide with each other, and the tip is inserted linearly to the point where the tip pin outline matches the spring inner diameter. It is characterized in that it is screwed in by the amount of the element wire diameter pitch of the spring, always screwed in with the specified rotation amount, and after the screwing is completed, it has the function of removing the relative movement of the tip pin and the spring holder from the spring holder by reverse rotation backward A dedicated processing machine is disclosed.

  However, in the above, a dedicated processing machine is required for screwing the spring. In addition, since the spring is pushed in by the amount of the wire diameter little by little, the push-in mechanism is complicated and the processing machine becomes expensive, and there is a problem that it takes time to mount the spring. In addition, in order to stabilize the direction of the bullet ball, the end surface of the spring opposite to the ball striking surface must also be processed flat, which poses a problem in that it takes time to manufacture the spring.

JP 2002-143411 A

  In view of the above-described conventional problems, the present invention provides a method for manufacturing a ball cage for a gaming machine and a ball cage that can easily produce a ball cage having excellent ball firing direction and stability in flight distance. The task is to do.

  In order to solve the above-mentioned problems, a method for manufacturing a ball cage according to the present invention includes a spring for striking a ball to a tip pin of a ball cage main body provided in a launching device of a gaming machine, and an operation handle In the method for manufacturing a bullet ball cage, the tip of the bullet ball cage body is driven by driving the bullet ball cage body according to the operation amount of the After the coiled spring is fitted, the end of the spring is processed into a flat surface.

In the above-described invention, after performing the process of forming the tip pin by fixing the ball and ball main body to the machine tool, the spring is fitted into the tip pin while being fixed to the machine tool. The end face can be processed.
In addition, it is desirable that the tip of the spring is ground to a flat surface with the grinding wheel after the axis of the tip pin is orthogonal to the grinding surface of the grinding wheel. When inserting a spring, insert a spring into the blind hole with the start of winding first and fit the start of winding into the recess using a jig with a recess that can be inserted into the bottom of the blind hole. It is desirable that the position of the winding start is determined and the spring is fitted into the tip pin from the winding end side end. Further, it is desirable that the tip pin is provided with an annular groove at the base of the ball bowl main body, and the end of winding of the spring is fitted into the annular groove.

  Further, the ball cage of the gaming machine according to the present invention is manufactured by any one of the methods according to claims 1 to 4.

  According to the first aspect of the present invention, since the tip of the spring is ground into a flat surface after the spring is fitted into the tip pin, the position of the spring hitting surface is always constant without causing variation between the ball balls. It can be.

  According to the second aspect of the present invention, it is possible to consistently perform from the forming processing of the tip pin to the bullet ball cage main body to the end face processing of the tip of the spring using the same machine tool.

  In the invention of claim 3, since the tip of the spring is ground with the grinding wheel after the axis of the tip pin is orthogonal to the grinding surface of the grinding wheel, the direction of the ball striking surface varies between the ball balls Can always be kept constant.

  In the invention of claim 4, since the winding start position of the spring fitted in the tip pin can be always kept constant, variation in the ball firing direction due to variation in the winding start position can be prevented by a simple method. Can do.

  According to the fifth aspect of the present invention, the end of winding of the metal wire forming the spring is fitted into the annular groove provided in the base portion of the tip pin, so that the spring does not fall off the tip pin. In addition, there is an advantage that it is not necessary to grind one end of the spring.

  According to the sixth aspect of the present invention, it is possible to provide a ball gutter for a gaming machine that is excellent in the stability of the firing speed and firing direction of the ball and is low in cost.

It is a front view of the bullet ball cage of the present invention. It is explanatory drawing which shows attachment of the spring to a tip pin. It is a perspective view of the jig for a bullet ball cage main body set. It is a front view which shows the state which set the bullet ball cage main body on the jig | tool. It is a front view which shows the state which starts a spring end surface with a tool. It is a front view which shows the state which complete | finished the spring end surface with the tool. It is a perspective view which shows the attachment state to a machine tool. It is a front view which shows the tip part of the bullet ball cage of this invention.

Hereinafter, embodiments of the present invention will be described.
FIG. 1 is a diagram for explaining a ball cage manufactured by the method of the present invention, in which 1 is a bullet cage body obtained by punching a metal plate such as a thin steel plate, and 2 is a rotary shaft of a rotary solenoid. It is a square hole for mounting so as not to rotate. The entire ball cage main body 1 is curved, and a tip pin 3 processed into a substantially cylindrical shape by using a machine tool such as a lathe is integrally formed at the tip thereof. A bullet spring 5 is attached to the tip pin 3.

  FIG. 2 shows a state in which a spring 5 coiled on the tip pin 3 (a spring that is coiled) is mounted. The tip pin 3 has a truncated cone-shaped tapered portion 31 having a small diameter at the tip, and a large-diameter portion 32 connected thereto. The diameter of the large-diameter portion 32 is formed larger than the inner diameter of the spring 3. An annular groove 33 is provided between the base portion of the tip pin 3, that is, between the large diameter portion 32 and the bullet sphere main body side surface 10. The spring 5 is a compression coil spring in which both end portions are wound more densely in the middle, and the tip end portion is formed to have a tapered small diameter. The spring 5 has a winding start 51 on the front end side and a winding end 52 on the rear end side.

  In order to attach the spring 5 to the tip pin 3, for example, the spring 5 before end face processing is inserted into a blind hole 71 provided in the jig 7, and the winding end 52 of the spring 5 is set as shown in FIG. Insert it into the tip pin 3. Here, since the concave portion 72 is provided at the bottom of the blind hole 71, the winding start 51 when the spring 5 is fitted into the tip pin 3 by inserting the winding start 51 of the spring 5 into the concave portion 72. And the position of the winding end 52 can be made constant at all times, so that variations in the ball firing direction can be prevented.

  When the spring 5 is pushed in until the winding end 52 of the spring 5 comes into contact with the side surface 10 of the bullet ball cage main body 1, the winding end 52 is fitted into the annular groove 33, and the diameter of the spring 5 is increased by the large diameter portion 32. Therefore, it is possible to prevent the spring 5 from falling off the tip pin 3. Further, the spring 5 can be prevented from rotating by the bullet ball by tightly tightening the large diameter portion 32.

Below, the manufacturing method of the bullet ball cage of this invention is demonstrated.
FIG. 3 is a diagram showing an example of a holder 11 for correctly setting the ball cage main body 1 on a machine tool such as a lathe or a grinding machine. Reference numeral 12 denotes a fixing member. The fixing member 12 has a protrusion 15 for insertion into the square hole 2 of the ball and shell main body 1 and is rotatably attached to the holder 11. Reference numeral 13 denotes a pillow portion that can be slid on the holder 11 to adjust its position. Further, the holder 11 is provided with a mounting hole 14 for fixing the holder 11 on a main spindle of a machine tool such as a grinding machine or a lathe.

  The pillow portion 13 has a long hole 16, and is attached so that the position can be adjusted by sliding on the holder 11 with a bolt 17 inserted through the long hole 16. Moreover, the pillow part 13 has the side surface 18 which inclines with respect to the elongate hole 16, and supports the back surface of the ball bowl main body 1 as shown in FIG. For this reason, by sliding the pillow part 13 with respect to the holder 11, it is possible to adjust the angle of attachment of the ball cage main body 1 to the holder 11 as shown in FIG. 4.

  The grindstone 8 has a cup shape as shown in FIG. 4, and is retracted when the spring 5 is inserted into the tip pin 3. After the spring 5 is inserted, the grindstone 8 advances in the direction of arrow A, stops at the forward end shown in FIG. 5, and then the spring end face is ground while moving in the direction of arrow B. Then, after stopping at the position shown in FIG. 6, it moves in the direction of arrow C, and the grindstone 8 retracts at a position that does not interfere with other processing. Note that the grinding surface 81 of the grindstone 8 is refreshed by a diamond dresser or the like at this retreat location.

  As shown in FIG. 7, the holder 11 is mounted on the main shaft of the machine tool, and the bullet ball cage main body 1 is set on the holder 11, and is securely fixed by being sandwiched between the upper and lower chucks 19. At this time, the position is adjusted by sliding the pillow portion 13 so that the axis P of the tip pin 3 is orthogonal to the grinding surface 81 of the grinding wheel 8 (FIG. 4).

  Next, the tip of the spring 5 attached to the tip pin 3 is ground to a flat surface. If grinding is performed with the moving distance of the grinding wheel 81 in the direction of the axis P always constant, as shown in FIG. 8, the length L of the spring 5 can be kept constant as shown in FIG. The ball can be fired at a rotation angle of, and the firing speed does not vary. Further, since the orientation Q of the flat surface of the spring 3 can always be maintained in a constant direction orthogonal to the axis P, the ball firing direction does not vary.

In addition, attachment of the spring 5 to the tip pin 3 of the ball ball main body 1 and end face processing are performed after forming a tip pin on the ball ball main body 1 with a machine tool such as a lathe. It can also be performed while attached to.
In detail, the ball ball hook body 1 before the tip pin 3 is formed is fixed so that the axis of the portion that becomes the tip pin 3 is positioned on the rotation center axis of the lathe, and is turned by a turning tool (not shown). Turning to form the tip pin 3 is performed. Thereafter, the spring 5 coiled on the tip pin 3 is fitted with the lathe fixed to the lathe (FIG. 7), and the grinding wheel 8 is moved in a direction perpendicular to the axis of the tip pin 3 while rotating the lathe. Then, the end of the spring 5 is processed into a flat surface.
As a result, once the ball cage main body 1 is held on a lathe, it is possible to carry out consistently from the turning process for forming the tip pin 3 on the ball ball saddle body to the end face machining of the spring 3, so that the production efficiency The advantage that becomes higher can be obtained.

1 bullet ball body, 3 tip pin, 5 spring, 8 grinding wheel, 81 grinding surface,

Claims (6)

A spring for hitting a ball is attached to the tip pin of the ball ball main body provided in the launching device of the gaming machine, and the ball ball main body is driven according to the operation amount of the operation handle. In the method of manufacturing a ball cage, a spring linked with the main body launches a ball and fires it,
A method for manufacturing a ball cage for a gaming machine, comprising: fitting a spring coiled to a tip pin of a ball cage main body; and processing the end of the spring into a flat surface.   After performing the processing to form the tip pin by fixing the ball and ball main body to the machine tool, the end face of this spring is processed after the spring is fitted into the tip pin while being fixed to the machine tool. The method of manufacturing a ball cage for a gaming machine according to claim 1.   The ball ball cage of a gaming machine according to claim 1 or 2, wherein the tip of the spring is ground to a flat surface by the grinding wheel after the axis of the tip pin is orthogonal to the grinding surface of the grinding wheel. Manufacturing method.   When fitting the coiled spring to the tip pin of the ball ball cage body, use a jig with a recess that can fit the start of the spring at the bottom of the blind hole. The spring is inserted into the tip pin from the winding end side end portion after inserting the spring into the recess and determining the position of the winding start by fitting the winding start into the recess. A method for producing a ball cage for a gaming machine according to any one of the above.   The said tip pin has an annular groove at the base part on the side of the bullet ball cage body, and the end of winding of the spring is fitted into this annular groove. A method for manufacturing the ball gutter of the gaming machine as described.   A ball gutter for a gaming machine manufactured by the method according to any one of claims 1 to 5.

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