JPH1015165A - Nails for pachinko game machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To disperse stress, and prevent separation and floatation by forming a cut on the peripheral area of a cell sheet with nails to be driven. SOLUTION: A knurled part 1d of a plurality of recessed rows 1d-1 as well as a plurality of projected rows 1d-2 is formed on a columnar nail body 1a at a position nearer the sharpened end 1b thereof. In addition, the recessed rows 1d-1 and the projected rows 1d-2 are alternately and peripherally arranged on the nail body 1a at equal intervals. and extended along the axial direction of the nail body 1a. When a nail is driven into a game board, a knife edge on the crest of each projected row 1d-2 forms a cut on the cell sheet of the game board.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pachinko ball, which is driven into a game board and collides with a pachinko ball at a portion protruding from the game board to bounce off the pachinko ball. It relates to gaming nails that are said to be the life of pachinko machines.

[0002]

2. Description of the Related Art FIG.
In the gaming nail 10 used in the conventional pachinko machine shown in the publication, a spiral torsion portion 10b is formed near a pointed end of a cylindrical nail body 10a. As shown in FIG. 4, when a predetermined amount of the game nail 10 is driven into a game board 20b such as a veneer board to which a cell sheet 20a on which a design drawing of the game board 20 is drawn is connected, the game nail is formed by the twisted portion 10b. 10 enters at a predetermined inclination angle so as not to be affected by the grain of the game board 20b.

[0003]

When the cell sheet is a design drawing of a celluloid having a light transmitting property, peeling of the cell sheet around the driven nail is small and small. PET film (PET; polyethylene terephthalate film)
When a highly viscous base material such as that described above is used, the peeling of the cell sheet around the driven game nail occurs more largely than celluloid. This is, as shown in FIG. 4, when the game nail 10 is driven, the torsion portion 10b pushes the cell sheet 20a and the game board 20b outward,
An annular gap 21 is formed between the nail body 10a and the cell sheet 20a around the nail, and a stress distortion remains in the cell sheet 20a. The stress distortion proceeds to a portion where the bonding strength between the cell sheet 20a and the game board 20b is weakest, It is considered that the area around the gaming nail 10 of the cell sheet 20a peels off and rises.
The ring-shaped floating portion due to the peeling is indicated by reference numeral 22 in FIG. 4A. In addition, when the cell sheet 20a is formed of a surface luminous body such as an electroluminescent element including a transparent electrode, a light emitting layer, a back electrode, and a protective layer on the back surface of a surface layer such as a pet film. Similarly, between the transparent electrode and the light emitting layer, between the light emitting layer and the back electrode, between the back electrode and the protective layer, between the protective layer and the fixing paper such as Kent paper lined with the same. Causes peeling at the weakest part of the bonding strength.

[0004] In view of the above, the present invention aims at distributing the stress by making a cut around the cell sheet with a game nail to be driven.
An object of the present invention is to provide a gaming nail capable of preventing peeling and floating and improving quality reliability.

[0005]

According to a first aspect of the present invention, a gaming nail for a pachinko machine includes a plurality of knurls formed of a plurality of uneven strips near a tip of a cylindrical nail body, and the uneven strips of the knurls are alternately formed. The nail is arranged in the circumferential direction of the nail body and extends along the axial direction of the nail body. According to the configuration of claim 1, when the game nail is driven into the game board by a predetermined amount, the knife at the crest of the ridge is formed in the process in which the knurl portion composed of the plurality of uneven strips passes through the cell sheet of the game board. By making a cut in the cell sheet around which the edge is present, even if the base material of the cell sheet is a celluloid, or even a highly viscous base material such as a pet film, the game nail enters the game board. With the above, each part separated by the cut of the cell sheet is drawn in between the game nail and the game board, the stress is dispersed, peeling and lifting are prevented, and the quality reliability can be improved. . In addition, by forming the ridges and valleys of the knurl part as vertical grooves that are parallel and straight along the axial direction of the nail body, the knurl part allows the game nail to be driven into the game board with good straightness, A plywood or a hard material having a low water content can be used for the substrate, and the degree of freedom in selecting a material for the game substrate can be increased. Further, in the state where the knurl portion enters while making a cut in the cell sheet and the game board, and the game nail is driven into the game board by a predetermined amount, the game board comes into close contact with the perimeter of the driven game nail. When the pachinko ball collides with the game nail protruding from the game board, the game nail can be firmly held on the game board against external force acting on the game nail from the side. Can be improved. If the knurls are arranged equally in the circumferential direction of the nail body, when the knurls are driven into the game board, they do not receive a biased external force, and the game nails can be accurately formed at a predetermined inclination angle with respect to the game board. By proceeding straight, the nail can be prevented from being bent, and the game nail can be accurately driven. Further, the knurl target portion and the straight target portion are formed thinner than the nail body, and the thin portion is sandwiched between a pair of knurl dies having unevenness in parallel on the outer peripheral surface such as a spur gear, thereby leaving the straight portion. If the uneven nails are connected from the base with the thick tip, and the ridges of the ridges are set to be flush with the outer peripheral surface of the nail body, the knurl part will be In addition to making a cut in the sheet, the resistance to enter the game board can be further reduced.

[0006]

1 and 2 show one embodiment of the present invention. In FIG. 1, a gaming nail 1 has a cylindrical nail body 1a, a tip 1b at one end of the nail body 1a, a hemispherical head 1c at a larger diameter than the other end of the nail body 1a, and a nail near the tip 1b. A knurl portion 1d, a knurl portion 1d and a pointed portion 1 in the middle of the main body 1a.
b.

In this embodiment, the knurl portion 1d has a plurality of ridges 1d-1 and a plurality of ridges 1d-2 arranged alternately in the circumferential direction. The concave ridges 1d-1 and the convex ridges 1d-2 are alternately arranged equally in the circumferential direction of the nail body 1a and extend along the axial direction of the nail body 1a.

For example, a pair of knurl dies, such as spur gears, having irregularities parallel to the outer peripheral surface are driven to rotate in opposite directions, and a knurl portion 1d formed between these knurl dies and having the same diameter as the nail body 1a. The knurl portion 1d is formed by sandwiching the knurl target portion that forms the ridges 1d-1 and the ridges 1d-2 alternately and equally arranged in the circumferential direction on the outer peripheral surface of the nail body 1a. Is formed on the nail body 1a. In each of the concave stripes 1d-1, a valley extending linearly along the axis of the nail body 1a is depressed inward from the outer peripheral surface of the nail body 1a, and the valleys facing each other on the diameter line of the nail body 1a are nails. It is located on a circumference centered on the center of the main body 1a. In addition, each ridge 1d
-2, a crest extending linearly along the axis of the nail body 1a projects outward from the outer peripheral surface of the nail body 1a;
The crests facing each other on the diameter line a are located on a circumference centered on the center of the nail main body 1a. The straight portion 1e has the same thickness as the nail body 1a.

According to the structure of this embodiment, as shown in FIG. 2, a game nail 1 is placed on a game board 2b such as a veneer board to which a cell sheet 2a having a design drawing of a game board 2 is connected. In the process of passing the knurl part 1d through the cell sheet 2a when the fixed amount is driven, a cut 3 is made in the cell sheet 2a around which the knife edge at the peak of the ridge 1d-2 is present. When the cut 3 is formed in the cell sheet 2a, not only when the base material of the cell sheet 2a is a celluloid but also when the base material of the sticky material such as a pet film is separated by the cut 3 of the cell sheet 2a. The portion 2a-1 is drawn between the game nail 1 and the game board 2b as the game nail 1 enters the game board 2, the stress is dispersed, and peeling and floating are prevented, and the quality reliability is improved. Can be improved. Reference numeral 4 in FIG. 2B denotes a star-shaped gap formed between the nail body 1a and the cell sheet 2a.

Further, since each of the concave ridges 1d-1 and each of the convex ridges 1d-2 are formed like vertical grooves which are straight and parallel to each other along the axial direction of the nail main body 1a, the game nail 1 is formed in the knurled portion. It is driven into the game board 2 with good straightness by 1d. Therefore, it is possible to use a plywood or a hard material having a low water content for the game board 2b, and the degree of freedom in selecting the material of the game board 2b is widened.

Further, the knurl portion 1d enters the cell sheet 2a and the game board 2b while making a cut, and the game nail 1
In a state where the game board 2 is driven into the game board 2 by a predetermined amount, the game board 2 comes into close contact with the driven nail 1 so that the pachinko ball collides with the game nail 1 projecting from the game board 2 during the game. Also, the game nail 1 can be firmly held on the game board 2 with respect to an external force acting on the game nail 1 from the lateral direction, and the playability can be improved.

Further, since the concave ridges 1d-1 and the convex ridges 1d-2 are equally spaced in the circumferential direction of the nail body 1a, the knurled portion 1d is deviated particularly when it is driven into the game board 2b. Without receiving an external force, the game nail 1 can be accurately advanced straight at a predetermined inclination angle with respect to the game board 2 to prevent the bending of the nail, so that the game nail 1 can be accurately driven.

Further, since the knurl target portion is formed to have the same diameter as the nail body 1a, and the knurl target portion is sandwiched between a pair of knurl dies, the knurl portion 1d is formed, so that the knurl portion 1d is formed. The shape of the previous nail body 1a can be simply and easily formed.

In the above embodiment, the valley of the concave stripe 1d-1 is depressed inward from the outer peripheral surface of the nail body 1a, and the convex stripe 1d-2 is formed.
Although the shape in which the crests protrude outward from the outer peripheral surface of the nail body 1a is illustrated and described, although not shown, the knurl target portion and the straight target portion are formed thinner than the nail body 1a, and this narrow portion is formed. By being sandwiched between a pair of knurl dies having unevenness in parallel on the outer peripheral surface like a spur gear,
Without leaving the straight part 1e, the concave stripe 1d-1
And the protruding ridge 1d-2 are connected from the thick root portion of the pointed end 1b, and the crest of the protruding ridge 1d-2 is set flush with the outer peripheral surface of the nail body 1a. In this case, the knurl portion 1d makes a cut in the cell sheet 2a, and the resistance to enter the game board 2a can be further reduced. Also, the knurl target part is formed thicker than the nail body 1a,
By inserting this thick portion between a pair of knurl dies having unevenness in parallel on the outer peripheral surface such as a spur gear, the valley of the concave stripe 1d-1 is substantially flush with the outer peripheral surface of the nail body 1a. Even if it protrudes outward, the driving resistance of the game nail 1 increases, but the same can be applied.

The cell sheet 2a is not limited to one having a design drawing printed on the back surface thereof, and may be formed of a transparent film, a light emitting layer, a back electrode, a protective layer, etc. on the back surface of a surface layer such as a pet film. The same effect can be obtained by using the surface light emitter.

In the above embodiment, when the game nail 1 is driven into the game board 2, the knurl part 1 d is completely embedded in the game board 2. The tip 1b side may enter the game board 2b from the cell sheet 2a, and the head 1c side may be formed outside the surface of the game board 2 (the surface of the cell sheet 2a) within a range where the pachinko ball does not hit. The same applies.

The knurl portion 1d has its tip 1b side entering the game board 2b from the cell sheet 2a and its head 1c.
If the pachinko ball is formed so as to protrude outside the surface of the game board 2 in a range where the pachinko ball hits, the pachinko ball can be made to move with unexpectedness.

[Brief description of the drawings]

FIG. 1 shows an embodiment, FIG. 1A is a side view, and FIG.
-A line sectional drawing.

FIG. 2 shows a state in which the embodiment is driven into a game board, wherein FIG. 2A is a longitudinal sectional view, and FIG. 2B is a sectional view corresponding to line BB.

FIG. 3 is a side view showing a conventional game nail.

4 shows a state in which a conventional game nail is driven into a game board, FIG. 4A is a longitudinal sectional view, and FIG. 4B is a sectional view corresponding to line CC.

[Explanation of symbols]

1 Gaming nails, 1a nail body, 1b tip, 1d knurl, 1d-1 concave, 1d-2 convex.

Claims (1)

[Claims] 1. A cylindrical nail body having a knurl portion formed of a plurality of ridges near a pointed end of the nail body, and the ridges and ridges of the knurl portion are alternately arranged in the circumferential direction of the nail body and in the axial direction of the nail body. A game nail for a pachinko machine that has been extended along.