JPH0734898U - Rotating table - Google Patents

Abstract

(57) [Abstract] [Purpose] Abolishing the rotating shaft to reduce the size and weight of the device, and to arrange a slip ring at the center of rotation. [Composition] Angular type upper and lower races, a circular ball bearing consisting of steel balls sandwiched between the upper and lower races, a circular table fixed to the upper races, and a lower race fixed And a base frame that operates.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotary table most suitable for a simulation type video game machine.

[0002]

[Prior art]

 The following are examples of turntables used for game machines, transportation, and parking lots.

The rotary table shown in FIG. 6 has a rotary shaft 21 at the center of a circular table 20, and a sprocket 22 is fixed to the rotary shaft 21. A sprocket 23 is attached to a speed reducer 26 that reduces the rotation of the motor 25, and a chain 24 is stretched between the sprocket 22 and the sprocket 23. The rotation of the motor 25 rotates the sprocket 22 and the sprocket 23, and thus the circular table 20 rotates.

In the rotary table shown in FIG. 7, a rotary shaft 31 is provided at the center of the circular table 30, and a pinion gear 32 is fixed to the rotary shaft 31. A pinion gear 33 is attached to a speed reducer 36 that reduces the rotation of the motor 35, and the pinion gear 32 and the pinion gear 33 mesh with each other. The rotation of the motor 35 causes the pinion gear 32 and the pinion gear 33 to rotate, so that the circular table 30 rotates.

In the rotary table shown in FIG. 8, a rotary shaft 41 is provided at the center of the circular table 40, and a cylindrical portion 42 is formed on the peripheral surface of the circular table 40. A roller 43 is attached to the speed reducer 46 that reduces the rotation of the motor 45, and the cylindrical portion 42 and the roller 43 are in pressure contact with each other. The rotation of the motor 45 causes the roller 43 to rotate, which in turn rotates the circular table 40 that is in pressure contact with the roller 43 and the cylindrical portion 42.

[0006]

[Problems to be solved by the device]

 However, the above-mentioned conventional techniques have the following drawbacks.

In the method of transmitting the rotational force by the sprocket and the chain, the play of the rotational direction is apt to occur due to the elongation of the chain, and when the elongation becomes large, the chain comes out. Also, maintenance of oil lubrication is necessary to prevent the chain from stretching.

In the method of generating a rotational force by gear transmission, the weight is increased on the shaft due to the gear structure, the moment of inertia is large, and backlash causes rattling on the circumference. Even if it is smooth, if oil is used, the gear will be built in the case, which will increase the cost. When using grease, the maintenance cost is always high to prevent the grease from running out.

Further, each of them has a rotary shaft at the center and has a structure in which one rotary shaft supports the entire circular table. Therefore, a strong structure is required, so that the device becomes large, There is a problem that the weight also increases. Further, even when a power source is required on the circular table, there is a problem that the slip ring cannot be arranged at the center of rotation because the center of rotation is the rotation axis.

The present invention has been made in view of such a situation, and aims to reduce the size and weight of the device by eliminating the rotary shaft, and to arrange the slip ring at the center of rotation. To aim.

[0011]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides an angular type upper and lower races, a circular ball bearing made of steel balls sandwiched between the upper and lower races, and a circular ball fixed to the upper race. It is configured to include a table and a base frame for fixing the lower race.

[0012]

[Action]

 In the rotary table with the above structure, the circular ball bearing made of steel balls sandwiched between the angular type upper and lower races and the upper and lower races is used to rotate the table. It is possible to eliminate the shaft to reduce the size and weight of the device and place a slip ring at the center of rotation.

[0013]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of a rotary table according to the present invention.

In FIG. 1, a circular table 2 is placed at the center of a box-shaped base frame 1. As shown in FIGS. 2 and 4, the circular table 2 is arranged above a ball bearing 3 placed on the subframe 1a (FIG. 4). The ball bearing 3 includes a ball bearing race 3a, a ball bearing race 3b, and a ball 3c. This ball bearing 3 is an angular type ball bearing that withstands vertical and horizontal loads by inserting a steel ball (ball 3c) between the upper and lower parts that are welded into a circular shape by drawing drawn steel materials in a circular shape to reduce costs. It is At the lower part of the circular table 2, a cylindrical rim portion 2 a is formed integrally with the base frame 1. When the rim portion 2a and the rubber roller 4 (FIGS. 3 and 4) are in contact with each other, the rotational driving force is transmitted to the circular table 2.

The rotational driving force of the motor 5 decelerated by the speed reducer 5 a is transmitted to the rubber roller 4. Further, the rubber roller 4, the motor 5 and the like are placed on the motor frame 7, and the motor frame 7 is swingably supported about the motor frame pivot 9. The motor frame 7 is biased by the spring 6 in the right direction in FIGS. 3 and 4. Therefore, the motor frame 7 is biased in the clockwise direction in FIG. 3 and presses the rubber roller 4 against the rim portion 2a, so that the rotational driving force of the motor 5 is transmitted to the circular table 2 in an accurate state without slip. It The reference numeral 8 designates a shock absorber unit for absorbing the surging of the pressing spring 6 of the rubber roller 4, which is provided together with the spring 6.

An opening 2 b is formed in the center of the circular table 2. As shown in FIG. 4, a slip ring 11 is provided below the opening 2b (inside the circular table 2), and a device mounted on the circular table 2 via the slip ring 11 (see FIG. 5). Power). The power supply terminal 10 (FIG. 1) mounted on the circular table 2 is provided to supply power to the device mounted on the circular table 2, and the cable 13 (FIG. 4) and the slip ring 11 are provided. , And power is supplied to the device mounted on the circular table 2 from the outside via the cable 12. As a device placed on the circular table 2, for example, a game machine 17 shown in FIG. 5 in which a player is placed on a seat 14 and rotated together with the display unit 15 and the operation unit 16 is conceivable. Although FIG. 5 shows the game machine 17 that rotates about one axis, setting a movable housing on the circular table 2 also enables a sensible game with multiple axes of movement.

According to the above-described embodiment, the rotating shaft that receives a load is unnecessary, and the weight can be reduced. Since there is no rotating shaft, the slip ring for power supply, which is placed in the center, can be stored compactly. The ball bearing race is made by bending drawn steel into a circular shape and welding it, making it easy to reduce costs. Since a large angular type ball bearing is directly fixed to the base frame, it can bear a large load in the vertical and horizontal directions. Rotational transmission is friction driven by rubber rollers, so maintenance can be performed for a long time. Since friction is driven by rubber rollers, like a chain or gear, the pushing force of the rubber roller is set by springs without damaging the motor, etc. against overload, and slipping is induced, giving a torque limiter function. be able to.

[0019]

[Effect of device]

 As described above, according to the present invention, the table is rotated by the circular ball bearing made of the steel balls sandwiched between the upper and lower races of the angular type and the upper and lower races. Therefore, it is possible to eliminate the rotary shaft to reduce the size and weight of the device and arrange a slip ring at the center of rotation.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a rotary table according to the present invention.

FIG. 2 is a front view showing an embodiment of a rotary table according to the present invention.

FIG. 3 is a top view showing an embodiment of a rotary table according to the present invention.

FIG. 4 is a side view showing an embodiment of a rotary table according to the present invention.

FIG. 5 is a front view showing an embodiment of a rotary table according to the present invention.

FIG. 6 is a perspective view showing an example of a conventional rotary table.

FIG. 7 is a perspective view showing an example of a conventional rotary table.

FIG. 8 is a perspective view showing an example of a conventional rotary table.

[Explanation of symbols]

 1 Base Frame 1a Subframe 2 Circular Table 2a Rim 2b Opening 3 Ball Bearing 3a Ball Bearing Race 3b Ball Bearing Race 3c Ball 4 Rubber Roller 5 Motor 5a Reducer 6 Spring 7 Motor Frame 8 Shock Absorber Unit 9 Motor Frame Pivot 10 Power supply terminal 11 Slip ring 12 Cable 13 Cable

Claims (4)

[Scope of utility model registration request] 1. A circular ball bearing made of an angular type upper race and a lower race, steel balls sandwiched between the upper race and the lower race, a table fixed to the upper race, and the lower race. A rotary table having a base frame for fixing the side races. 2. A device mounted on the table, comprising a slip ring provided at the center of the table,
The rotary table according to claim 1, wherein power is supplied through the slip ring. 3. A rim portion fixedly provided between the table and the upper race, and a rubber roller in pressure contact with the rim portion, and a rotational driving force is transmitted to the table via the rubber roller. The rotary table according to claim 1, wherein: 4. The rubber roller, a motor frame on which the rubber roller is placed and which is pivotally supported, and a spring for urging the motor frame. The rotary table according to claim 1, wherein the rubber roller is pressed against the rim portion.