JP2001178950A - Lifting belt for pachinko ball lifting and polishing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the lifting belt of a pachinko ball lifting and polishing device that durability is superior and the decline of tension is drastically reduced though it is provided with a guide line for meandering prevention. SOLUTION: The surface of the boundary part of the main body part 11 and guide line 13 and 14 of this lifting belt 10 is reinforced by a reinforcing layer 15 and the tension core wire 16 of a steel wire or the like is used as a tension body. Thus, even at the time of circulating around a pair of upper and lower rotation bodies and repeating bending while receiving reaction from pachinko balls, the boundary part of the main body part 11 and the guide lines 13 and 14 is not cracked and the durability is remarkably improved. Also, since the tension body is not gradually stretched and the tension is not substantially lowered differently from a conventional lifting belt using a base cloth made of fibers as the tension body, the pachinko ball lifting and polishing device is stably operated over a long period of time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting belt for a pachinko ball lifting and polishing apparatus for polishing a pachinko ball discharged from a pachinko table while lifting the pachinko ball above the pachinko table. The present invention relates to a technique for improving the durability of a belt and reducing a decrease in the tension of the belt.

[0002]

2. Description of the Related Art Conventionally, in a pachinko game hall, pachinko balls discharged from a large number of pachinko machines are lifted upward while being polished and stored in a prize ball tank provided above the pachinko machines. A pachinko ball lifting and polishing apparatus used for lifting and polishing of such pachinko balls is described in, for example, Japanese Patent No. 2871631.

[0005] Referring to FIG. 5, this apparatus will be described. A lifting belt 4 used for lifting pachinko balls is wound between a pair of upper and lower rollers 2 and 3 of the pachinko ball lifting and polishing apparatus 1. I have. Further, a soft abrasive 5 used for polishing the pachinko balls is disposed facing a rising portion 4a of the lifting belt 4 with a predetermined gap. On the other hand, the pachinko balls 6 discharged from a large number of pachinko machines are supplied into a gap 7 between the lifting belt 4 and the abrasive 5 near the lower roller 3.

When a pair of upper and lower rollers 2 and 3 are rotated in the direction of the arrow shown in FIG. 5 by using a drive motor (not shown), a large number of pachinko balls 6
And the polishing material 5, and the rolling is performed while sliding while depressing the surface of the soft polishing material 5, and is transported upward while being polished. Then, the pachinko balls 6 reaching the upper side of the upper roller 2 are taken out of the cover 8 and transferred to and stored in a prize ball tank (not shown).

[0005]

As shown in FIG. 6, the conventional lifting belt 4 has an endless band plate in which a base fabric 4b made of polyester fiber is sandwiched by a resin such as polyurethane or vinyl chloride. The main body portion 4c includes a plurality of guide strips 4d protruding from the surface of the main body portion 4c on the side close to the rollers 2 and 3 and extending in the longitudinal direction. These guide strips 4d engage with guide grooves 2a, 3a formed in the surfaces of the pair of upper and lower rollers 2, 3 in the width direction thereof, and the lifting belt 4 circulates around the rollers 2, 3. It is designed to prevent meandering. At this time,
Since a reaction force from a pachinko ball having a smaller diameter than the width dimension of the lifting belt 4 acts on the lifting belt 4, when the lifting belt 4 circulates around the pair of upper and lower rollers 2 and 3 and repeats bending. In addition, a crack occurs at the boundary between the main body 4c and the guide strip 4d, and the lifting belt 4 is damaged in a short period of time.

The base fabric 4b made of polyester fiber is
It has the property of gradually expanding when tension is applied for a long period of time. Therefore, in order to secure the frictional force between the lifting belt 4 and the pair of upper and lower rollers 2 and 3 to ensure the driving of the lifting belt 4, the lifting belt 4 is , 3 must be set to an initial elongation of 2% or more. Therefore, since a strong tension acts on the lifting belt 4, it is necessary to strengthen the support structure of the pair of upper and lower rollers 2 and 3 around which the lifting belt 4 is wound.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a guide strip for preventing meandering, not only to have excellent durability, but also to wind around a pair of rollers. An object of the present invention is to provide a lifting belt of a pachinko ball lifting and polishing apparatus which can set a small tension at the time.

[0008]

According to a first aspect of the present invention, there is provided a pachinko ball lifting and polishing apparatus for polishing a pachinko ball upward while polishing the pachinko ball. An endless, band-shaped body portion wound around a pair of upper and lower rotating bodies and circulating around the body, and is protruded from the surface of the body portion on the side in contact with the rotating body and extends in the longitudinal direction. A guide groove recessed in the surface of the rotating body and a guide strip that engages in the width direction; a reinforcing layer that covers and reinforces a surface of a boundary portion between the guide strip and the main body;
It is characterized by having. The reinforcing layer can be formed by integrally adhering a reinforcing cloth to the surface of the main body portion and the guide strip. Also, the reinforcing layer can be provided over the entire width of the main body portion,
It is also possible to intensively dispose only at the boundary between the main body and the guide strip.

That is, the lifting belt according to the first aspect of the present invention is formed by covering the surface of the boundary portion between the main body and the guide strip with the reinforcing layer and reinforcing the surface. As a result, even when the lifting belt circulates around the pair of upper and lower rotating bodies and repeatedly bends while receiving the reaction force from the pachinko balls, the boundary portion between the main body portion and the guide strip may become fatigued and cracked. Therefore, the durability of the lifting belt can be dramatically improved. In addition, since a part of the tension acting on the lifting belt can be covered by the reinforcing layer, the effect of preventing the lifting belt from gradually expanding due to the tension acting on the lifting belt is also exerted.

According to a second aspect of the present invention, there is provided a pachinko ball lifting and polishing apparatus according to the first aspect, wherein the lifting belt is disposed inside the main body portion in a longitudinal direction. And a plurality of tensile cords extending to the end.

That is, the tension core wire used in the lifting belt according to the second aspect gradually expands when a tension acts like a conventionally used fiber base cloth, and the tension is greatly reduced. There is no such thing. Thus, the frictional force between the lifting belt and the rotating body can be maintained at a predetermined level for a long period of time, so that the pachinko ball lifting and polishing apparatus can be stably operated for a long period of time. In addition, it is not necessary to set a large initial tension when the lifting belt is wound around the pair of rotating bodies in anticipation of a decrease in the tension in advance, so it is necessary to strengthen the support structure of the pair of rotating bodies. Not only that, the life of the bearing for supporting the pair of rotating bodies can be extended to improve the durability of the pachinko ball lifting and polishing apparatus.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a lifting belt of a pachinko ball lifting and polishing apparatus according to the present invention will be described below in detail with reference to FIGS. Here, FIG. 1 is a sectional view showing a lifting belt according to an embodiment of the present invention, FIG. 2 is a sectional view showing a modification of the lifting belt shown in FIG. 1, and FIG. 3 is a lifting belt shown in FIG. FIG. 4 is a table showing a change in the tension of the feeding belt, and FIG. 4 is a diagram showing a change in the tension of the lifting belt shown in FIG.
In the following description, the same portions are denoted by the same reference characters, and description thereof will be omitted.

The lifting belt 10 of the pachinko ball lifting and polishing apparatus of the present embodiment shown in FIG. 1 is used for the pachinko ball lifting and polishing apparatus 1 shown in FIG. 5, and includes a pair of upper and lower rollers (rotating bodies). An endless, band-shaped body portion 11 wound around and circulating between the two is provided. A pair of left and right guide strips 13 and 14 extending in a longitudinal direction (a direction perpendicular to the paper surface of FIG. 1) of the lifting belt 10 is formed on a surface 12 of the main body portion 11 on a side close to the rollers 2 and 3. Has been established. These guide strips 13 and 14 are engaged in the width direction (left and right directions in the drawing) with guide grooves 2 a and 3 a respectively formed in the surfaces of the pair of upper and lower rollers 2 and 3, respectively. Meandering when circulating around the pair of upper and lower rollers 2 and 3 is prevented. The belt body 11 and the pair of left and right guide strips 13 and 14 are manufactured by extrusion molding, casting molding or press molding (vulcanization molding) of a rubber material such as polyurethane rubber, nitrile rubber, and chloroprene rubber. Can be.

Further, the surfaces of the main body portion 11 and the pair of left and right guide strips 13 and 14 on the rollers 2 and 3 side are integrally covered by a reinforcing layer 15 formed of a reinforcing cloth. The reinforcing layer 15 is formed by integrating a reinforcing cloth made of a synthetic fiber such as nylon, polyester, acrylic or aramid fiber, or a natural fiber such as cotton or hemp on the surface of the belt body 11 and the pair of left and right guide strips 13 and 14. It can be formed by vulcanization bonding. Thereby, even if the lifting belt 10 of this embodiment circulates around the pair of upper and lower rollers 2 and 3 and repeatedly bends while receiving the reaction force from the pachinko balls 6, the main body portion 11 and the pair of left and right guide strips are provided. 13,1
4 can be reliably prevented from being cracked at the boundary with the transport belt 4 and the transport belt 10 from being damaged.

In addition, a plurality of tensile cords 16 are arranged inside the main body 11 so as to be arranged at equal intervals in the width direction of the main body 11. Since these tensile cords 16 are made of a metal wire such as a steel wire or a stainless steel wire, or an aramid fiber or a glass fiber, unlike a fiber base fabric conventionally used, a tension is applied. Then, the tension is not gradually reduced and the tension is not greatly reduced. Accordingly, it is not necessary to set a large initial tension when the lifting belt 10 is wound between the pair of rollers 2 and 3 in anticipation of a decrease in the tension in advance, so that the support structure of the pair of rollers 2 and 3 is not required. Not only does it not need to be strong, but also the life of the bearing or the like that rotatably supports the pair of rollers 2 and 3 can be extended to improve the durability of the pachinko ball lifting and polishing apparatus. Further, since the frictional force between the lifting belt 10 and the pair of rollers 2 and 3 can be maintained at a predetermined level for a long time, the pachinko ball lifting and polishing apparatus can be stably operated for a long time. it can.

The lifting belt 1 of the present embodiment described above
A pair of right and left guide strips 13 and 14 are protruded from 0,
As shown in FIG. 2, only one guide strip 13 can be protruded, as in the lifting belt 20 of the modified example, or three guide strips can be protruded, as in the conventional lifting belt 4 shown in FIG. 6. It can also be set up.

Next, an experimental example in which the lifting belt according to the present invention is compared with a conventional lifting belt will be described.

First, the effect when the reinforcing layer is provided on the surface of the belt body and the guide strip of the lifting belt will be described. Here, Sample A is a lifting belt provided with a reinforcing layer according to the present invention, and Sample B is a conventional lifting belt not provided with a reinforcing layer, and has the following specifications.

The test conditions are as follows. Upper roller diameter 80 mm Lower roller diameter 100 mm Distance between roller axes 2500 mm Initial tension 50 kgf Drive roller rotation speed 120 rpm

When the above comparative test was conducted, the following test results were obtained. Sample A No abnormality at 3000 hours after the start of test Sample B Damage that extends in the longitudinal direction of the lifting belt at 270 hours after the start of the test. That is, the lift according to the present invention in which the surface of the main body and the guide strip are integrally covered with the reinforcing layer. It was confirmed that the feeding belt had about 11 times the durability of the conventional lifting belt.

Next, the effect when the tensile cord is provided inside the belt body of the lifting belt will be described. Here, Sample C is a lifting belt according to the present invention using a tensile cord as a tensile member, and Sample D is a conventional lifting belt using a polyester fiber base cloth as a tensile member. It has the following specifications. Sample C Sample D Belt width 90mm 90mm Belt length 1850mm 1850mm Body material Polyurethane Chloroprene rubber Tensile steel strand Wire base fabric made of polyester fiber

The test conditions are as follows. Upper roller diameter 100mm Lower roller diameter 100mm Initial tension Sample C 880N (0.1% elongation) Sample D 3920N (2% elongation) The value of the initial tension is to secure the frictional force between the lifting belt and the roller. The appropriate tension required for the test was set for each sample. Then, the above-mentioned initial tension was applied to the samples C and D and the sample C and the sample D were allowed to stand, and the magnitude of the tension at each elapsed time was measured.

As a result of the above comparative test, the test results shown in FIGS. 3 and 4 were obtained. That is, the initial tension set when the lifting belt of the present invention is wound between a pair of rollers is about 1 / 4.5 of that of the conventional lifting belt.
Level. As a result, the load applied to the pair of rollers around which the lifting belt is wound is reduced, so that the life of the bearing for rotating and supporting these rollers can be extended, and the durability of the pachinko ball lifting and polishing apparatus can be greatly increased. Can be improved.

Further, in the lifting belt according to the present invention in which the tensile cords are disposed inside the main body, the amount of decrease in the tension after 150 hours was about 14% of the initial tension. On the other hand, in the conventional lifting belt, 15
The amount of decrease in tension at the time of 0 hours is about 6 times the initial tension.
It has reached 0%. Thereby, according to the lifting belt of the present invention, the frictional force between the lifting belt and the roller can be maintained at a predetermined value or more for a long period of time. Can be improved.

The embodiment of the lifting belt of the pachinko ball lifting and polishing apparatus according to the present invention has been described in detail above.
The present invention is not limited to the above-described embodiment, and it goes without saying that various modifications are possible.
For example, in the embodiment described above, the guide strip is formed so as to extend continuously in the longitudinal direction of the lifting belt, but the guide strip may be provided intermittently in the longitudinal direction of the lifting belt. In the above-described embodiment, the reinforcing layer is provided over the entire width of the lifting belt. However, the reinforcing layer is provided so as to intensively reinforce only the boundary between the main body portion and the guide strip of the lifting belt. You can also.

[0026]

As is apparent from the above description, the lifting belt of the pachinko ball lifting and polishing apparatus according to the present invention is reinforced by covering the surface of the boundary between the main body and the guide strip with the reinforcing layer. Things. As a result, even when the lifting belt circulates around the pair of upper and lower rotating bodies and repeatedly bends while receiving the reaction force from the pachinko balls, the boundary portion between the main body portion and the guide strip may become fatigued and cracked. Therefore, the durability of the lifting belt can be dramatically improved. Further, the lifting belt of the pachinko ball lifting and polishing apparatus according to the present invention has a plurality of tensile cords extending in a longitudinal direction provided inside a main body thereof. Unlike the fiber base cloth which has been conventionally used, the tensile core wire does not gradually expand when a tension acts thereon, and the tension does not significantly decrease. Thus, the frictional force between the lifting belt and the rotating body can be maintained at a predetermined level for a long period of time, so that the pachinko ball lifting and polishing apparatus can be stably operated for a long period of time. In addition, it is not necessary to set a large initial tension when the lifting belt is wound around the pair of rotating bodies in anticipation of a decrease in the tension in advance, so it is necessary to strengthen the support structure of the pair of rotating bodies. Not only,
The durability of the pachinko ball lifting and polishing apparatus can be improved by extending the life of a bearing or the like that supports the pair of rotating bodies.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a lifting belt according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a modified example of the lifting belt shown in FIG.

FIG. 3 is a table showing a change in tension of the lifting belt shown in FIG. 1;

FIG. 4 is a diagram showing a change in tension of the lifting belt shown in FIG. 3;

FIG. 5 is a side view showing a main part of the pachinko ball lifting and polishing apparatus.

FIG. 6 is a sectional view showing the conventional lifting belt shown in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pachinko ball lifting and polishing device 2, 3 roller 4 Conventional lifting belt 5 Polishing means 6 Pachinko ball 7 Gap 8 Cover 10 Lifting belt according to the present invention 11 Main body portion 13, 14 Guide strip 15 Reinforcement layer 16 Tensile core Line 20 Modified Lifting Belt

Claims (2)

[Claims] 1. A lifting belt of a pachinko ball lifting and polishing apparatus for polishing and lifting a pachinko ball upward, wherein the belt is wound at least between a pair of upper and lower rotating bodies and has an endless shape circulating around the rotating body. A belt-shaped main body portion, which protrudes from the surface of the main body portion on the side in contact with the rotating body and extends in the longitudinal direction, and engages in a width direction with a guide groove recessed in the surface of the rotating body. A lifting belt for a pachinko ball lifting and polishing apparatus, comprising: a guide member to be formed; and a reinforcing layer for covering and reinforcing a surface of a boundary portion between the guide member and the main body. 2. A lifting belt for a pachinko ball lifting and polishing apparatus, further comprising a plurality of tensile cords disposed inside the main body portion and extending in a longitudinal direction.