JPH05132134A - Turntable - Google Patents

Abstract

PURPOSE:To provide a turntable securing high safety by immediately stopping turning in case when a specified load is applied to a main body of the turning turntable. CONSTITUTION:This turntable is furnished with a support table 4 and a turntable main body 2 supported free to turn on the support table 4. A drive means 8 is provided on the support table 4. The turntable main body 2 and the drive means 8 are connected to each other through a friction clutch means 10. It is constituted so that driving force by the drive means 8 is transmitted to the turntable main body 2 through frictional force generated by the friction clutch means 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turntable installed at an event site, a showroom or the like for mounting vehicles and other exhibits.

[0002]

2. Description of the Related Art A turntable as described above includes a support base and a turntable body rotatably supported on the support base. The support is also provided with a motor. By connecting the turntable body and the motor via the power transmission means, the driving force by the motor is
It is configured to be directly transmitted to the turntable body via the power transmission means.

[0003]

Since the above turntable is installed in an event hall or a showroom, for example, by mounting a vehicle, which is an exhibit, on the rotating turntable body or vehicle, People and obstacles are likely to come into contact with or hit. In particular, when the support base and the turntable main body are rectangular rather than circular when viewed from the top, the possibility is extremely high. In that case, in the above-mentioned conventional turntable, since the driving force by the motor is configured to be directly transmitted to the turntable main body through the power transmission means, the turntable main body is driven by the predetermined driving force by the motor. It keeps rotating. As a result, there is a problem that there is a risk of injuring a person or damaging an obstacle, a vehicle, a turntable body, or the like.

Therefore, an object of the present invention is to provide an improved turntable in which a high degree of safety is ensured by stopping the rotation immediately when a predetermined load is applied to the rotating turntable body. That is.

Other objects of the present invention will become apparent from the following description in which an embodiment of a turntable constructed according to the present invention will be described in detail with reference to the accompanying drawings.

[0006]

To achieve the above object, according to the present invention, a support base and a turntable body rotatably supported on the support base are provided, and the support base is driven. Means is provided, and the turntable main body and the driving means are connected via the friction clutch means, so that the driving force by the driving means is generated by the friction clutch means. A turntable is provided that is adapted to be transmitted to the body.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A turntable improved according to the present invention will be described in detail below with reference to the accompanying drawings. In FIG. 1, a turntable 2 improved in accordance with the present invention includes a support base 4 placed on the ground or floor, and a turntable body 6 rotatably supported on the support base 4. A drive means 8 is provided on the support base 4. By connecting the turntable body 6 and the driving means 8 via the friction clutch means 10, the driving force by the driving means 8 is transmitted to the turntable body 6 via the friction force generated in the friction clutch means 10. Is configured.

A more specific description will be given. With reference to FIGS. 1 to 3, the support base 4 is configured by connecting square pipe members, and is assembled into a rectangular shape when viewed from a plane although not shown. The left and right side portions (front and back direction in FIG. 1) of the support base 4 are respectively the upper frame 12 and the lower frame 14.
Is provided. The upper frame 12 and the lower frame 14 are connected and reinforced by two vertical frames at the center in the front-rear direction (left-right direction in FIG. 1) as shown in the figure. In the central portion, the upper frame 12 is connected by two horizontal frames 16 and 18, and the lower frame 14 is connected by two horizontal frames 20 and 22. In the horizontal center of each horizontal frame,
As shown in FIG. 3, four vertical frames 24, 2
6, 28, and 30 are arranged, and each end is connected to each horizontal frame. Between the vertical frames 24 and 26,
Reinforcing plates 32, 34 and 36 are provided between the vertical frames 28 and 30 and between the vertical frames 26 and 30, respectively. A support frame 38 extending forward is connected to the vertical frame 28.

A support plate 40 is fixed to the support frame 38, and the support plate 40 has an electric motor 4 serving as a driving means 8.
2 is attached. A sprocket 44 is attached to the drive shaft of the electric motor 42. The mounting portion of the electric motor 42 is covered with a suitable cover 45. Referring also to FIG. 4, the support base 4 includes bearing means 46.
Is provided. The bearing means 46 is composed of a shaft housing 48 and thrust bearings 50 and 52 supported at both ends of the shaft housing 48.
The shaft housing 48 includes a cylindrical body 54 and a body 5.
4 includes two mounting plates 56 and 58 fixed to the outer peripheral surface thereof. Each mounting plate 56 and 5
8 are configured to extend radially outward from the outer peripheral surface of the main body 54 and in directions opposite to each other. The tip of the mounting plate 56 is fixed to the reinforcing plate 32, and the tip of the mounting plate 58 is fixed to the reinforcing plate 34. Between the reinforcing plates 32 and 34 are two laterally extending reinforcing frames 60 and 62 of L-shaped cross section.
Is provided, and a part of the outer peripheral surface of the main body 54 of the shaft housing 48 is engaged and fixed in arcuate notches having the same diameter formed in the reinforcing frames 60 and 62. As described above, the bearing means 46 is provided on the support base 4.

In this example, the turntable 6 has a rectangular shape when viewed from a plane, and the outer size of the turntable 6 is substantially the same as that of the support base 4. Two parallel flat surfaces are provided on the upper surface of the turntable 6 so that at least the vehicle can enter from one end to the other end (right to left in FIG. 1). A rectangular support plate 64 is provided below the center of the turntable 6. A hole is formed in the center of the support plate 64. This support plate 6
A table post 66 is detachably attached to the No. 4 from below. Referring to FIG. 4, the table post 66 includes a rectangular body plate 68 and a body plate 68.
A cylindrical portion 70 that is upright and fixed to the center of the
It is composed of four reinforcing plates provided between the outer peripheral surface of the main body plate 68 and the main body plate 68. Body plate 68
A hole is also formed in the central part of the. The body plate 68 is attached to the support plate 64 by, for example, bolts and nuts. One end portion of the swivel shaft 72 is inserted into the cylindrical portion 70, a part thereof projects from a hole in the central portion of the main body plate 68, and is fixed to the main body plate 68 by welding at that portion. The pivot shaft 72 is inserted into thrust bearings 50 and 52 supported at both ends of the shaft housing 48 of the support 4. In this state, the lower end surface of the cylindrical portion 70 of the table post 66 is
Abut the 0 inner race. As described above, the turntable 6 is rotatably supported by the support base 4 via the bearing means 46.

Friction clutch means 10 is provided on the pivot shaft 72. The rotating shaft 72 is the friction clutch means 10.
The driving force of the electric motor 42 is transmitted to the turntable body 6 via the frictional force generated in the friction clutch means 10 by being connected to the electric motor 42 via the. More specifically, the friction clutch means 10 is mounted on the orbiting shaft 72 so as to rotate integrally therewith and not to move in one axial direction (upward direction in FIG. 4).
And a sprocket 76 that is a power transmission member that is rotatably supported by the swivel shaft 72 adjacent to the clutch member 74. The clutch member 74 is composed of a disc portion and a cylindrical portion integrally provided in the central portion of the disc portion, and a hole is formed in the central portion. A flat friction clutch surface is formed on one side surface (lower surface) of the disk portion. At the center of the lower surface of the disk portion, a grease storage recess 7 lower than the clutch surface is formed.
7 are formed. The clutch member 74 is made of rolled steel for general structure in this example. Sprocket 76
Also comprises a disc portion and a cylindrical portion integrally provided in the central portion of the disc portion, and a hole is formed in the central portion. A flat friction clutch surface is formed on one side surface (upper surface) of the disc portion. The sprocket 76 is made of carbon steel for machine structure in this example.

A thrust load in one direction is applied to the sprocket 76 by the tightening means 78 attached to the swivel shaft 72 so that one side surface of the sprocket 76 is pressed against one side surface of the clutch member 74. , Is connected to the electric motor 42 via the power transmission means. The power transmission means is composed of a sprocket 44 provided on the drive shaft of the electric motor 42 and a chain 80 connecting the sprockets 44 and 76. The clutch member 74 is
It is attached to the swivel shaft 72 via a key 82. The end surface of the cylindrical portion of the clutch member 74 has a thrust bearing 52 supported on the lower end of the shaft housing 48.
Is abutted against the inner race of and is prevented from moving upward. A sprocket 76 is rotatably supported by a swivel shaft 72 at a position below the clutch member 74 via a metal 84. A male screw is formed on the lower end portion of the turning shaft 72, and a nut 88 is engaged with this male screw portion via a washer 86. The washer 86 and the nut 88 constitute the tightening means 78. By tightening the nut 88, the friction clutch surface of the sprocket 76 is pressed against the friction clutch surface of the clutch member 74 with a predetermined thrust load. As shown in FIG. 5, a plurality of teeth are formed on the outer periphery of the washer 86,
A plurality of grooves are formed on the outer peripheral portion of the nut 88. After tightening the nut 88 with a predetermined tightening force, one of the teeth of the washer 86 is aligned with one of the grooves of the nut 88 and is bent, so that the tightened state is maintained. By adjusting the tightening force of the nut 88, the frictional force between the sprocket 76 and the clutch member 74 is adjusted, and the rotation speed of the turntable body 6 is adjusted. Grease is injected into the gap between the friction clutch surface of the sprocket 76 and the grease accommodating recess 77 of the sprocket 76.

Next, the operation of the turntable 2 configured as described above will be described. A vehicle, which is an exhibit, is loaded onto the turntable body 6 using a slope (not shown). Insert a plug (not shown) of an electric wire connected to the electric motor 42 into a predetermined outlet. The electric motor 42 rotates. The rotation of the electric motor 42 is transmitted to the sprocket 44, the chain 80, and the sprocket 76. The rotation of the sprocket 76 is transmitted to the friction clutch surface of the clutch member 74 via the friction clutch surface. A driving force corresponding to the magnitude of the frictional force generated on each friction clutch surface is transmitted from the sprocket 76 to the clutch member 7
4, transmitted to the turntable body 6 via the pivot shaft 72, the table post 66, and the support plate 64. The turntable body 6 rotates on the support base 4 at a predetermined rotation speed.

When a person or an obstacle accidentally contacts or hits the rotating turntable body 6 or the vehicle, a predetermined load is applied to the turntable body 6. The generation of this load causes slippage on the friction clutch surface between the sprocket 76 and the clutch member 74. As a result, the electric motor 42, the sprocket 76, and the like continue to rotate, but the rotation of the clutch member 74 stops. When the predetermined load is removed, the turntable body 6 starts to rotate again.

Although the present invention has been described in detail with reference to the embodiments, the present invention is not limited to the above embodiments, and various changes or modifications can be made within the scope of the present invention. ..

[0016]

As described above, according to the present invention described based on one embodiment, the following effects can be achieved. (1) In the turntable according to the present invention, since the turntable body and the driving means are connected via the friction clutch means, the driving force by the driving means is the turntable via the friction force generated in the friction clutch means. It is configured to be transmitted to the main body. Therefore, if a certain load is applied to the turntable body by accidentally touching or hitting the rotating turntable body or exhibit,
Immediately the rotation stops. As a result, the risk of injuring a person or damaging an obstacle, an exhibit, a turntable body, or the like is eliminated, and high safety is ensured. (2) The driving force of the electric motor is transmitted from the sprocket provided on the drive shaft of the electric motor to the sprocket provided on the turning shaft of the turntable body via the chain, and further via the clutch member to the turning shaft. That is, when it is configured to be transmitted to the turntable body, the drive mechanism of the turntable body is greatly simplified.
As a result, a drive mechanism that is relatively low in cost and has few failures can be obtained. Also, noise is greatly reduced,
It is especially effective for setting up a quiet showroom with a small space. (3) The power transmission member is configured such that a thrust load is applied in one axial direction by the tightening means attached to the swivel shaft so that one side surface of the power transmission member is pressed against the one side surface of the clutch member. In this case, the tightening means can easily adjust the frictional force between the power transmission member and the clutch member. Therefore, the rotation speed of the turntable body can be easily and arbitrarily adjusted, which is extremely advantageous in practice.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an embodiment of a turntable improved according to the present invention.

FIG. 2 is a schematic side view showing a turning shaft portion and a driving portion of the turntable shown in FIG.

FIG. 3 is a top view showing a mounting state of the shaft housing, and is a view in which a vertical frame portion of FIG. 2 is horizontally broken.

FIG. 4 is an enlarged view showing a part of FIG. 2, and is a view mainly showing a vertical half section.

FIG. 5 is a perspective view of a washer and a nut that form a tightening unit.

[Explanation of symbols]

 2 turntable 4 support base 6 turntable body 8 drive means 10 friction clutch means 42 electric motor 46 bearing means 48 shaft housing 66 table post 72 pivot shaft 74 clutch member 76 sprocket 78 tightening means 80 chain 86 washer 88 nut

Claims (4)

[Claims] 1. A support base and a turntable main body rotatably supported on the support base. The support base is provided with drive means, and the turntable main body and the drive means are friction clutches. The turntable is configured so that the driving force by the driving means is transmitted to the turntable main body via the frictional force generated in the friction clutch means by being connected via the means. 2. A support base and a turntable body are provided,
A swivel shaft is fixed to the turntable main body, bearing means is provided on the support base, and the swivel shaft is rotatably supported by the bearing means, whereby the turntable main body is supported by the support base. It is rotatably supported on the support base, the drive means is provided on the support base, the friction clutch means is provided on the swing shaft, and the swing shaft is connected to the drive means via the friction clutch means. As a result, the driving force of the driving means is configured to be transmitted to the turntable body via the frictional force generated in the friction clutch means. 3. The friction clutch means is a clutch member mounted on the pivot shaft so as to rotate integrally therewith and not movable in one axial direction, and adjacent to the clutch member. A power transmission member rotatably supported by the swivel shaft, wherein the power transmission member is tightened by the tightening means attached to the swivel shaft so that one side surface of the power transmission member is pressed against the one side surface of the clutch member. The turntable according to claim 2, wherein the thrust load in one direction is applied, and the power transmission member is configured to be connected to the drive means via a power transmission means. 4. The power transmission member comprises a sprocket, the drive means comprises an electric motor, and the power transmission means connects a sprocket provided on a drive shaft of the electric motor and each sprocket. The turntable according to claim 3, wherein the turntable comprises a chain.