JPH045445B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an exhibition turntable used for displaying automobiles and the like in a show room.

(Prior Art) Currently, most of the conventional turntables of this type are of the stationary type, and their turning drive devices are also often large-scale devices such as those found in automobile trailers.

(Problems to be solved by the invention) As mentioned above, the conventional exhibition turntable is
Since the swing drive device is large-scale, the height of the swing drive device itself becomes high, and as a result, the turntable becomes waist-height, making it unsuitable for use in general showrooms, as well as increasing the price.
There is a problem that it is inconvenient because it cannot be easily moved.

(Means for Solving the Problems) In order to solve the above-mentioned problems, in the present invention, a turntable is rotatably provided with respect to a base frame, and a rotation drive device having a friction roller is provided on the turntable side. A spring is placed between the turntable and a bracket that is pivotally supported by a vertical shaft and protrudes from the rotation drive device, and the friction roller is pressed into contact with a ring-shaped friction guide provided on the base frame. The turntable and the base frame can be connected with bolts, and the floor plate can be partially attached and detached to expose the framework frames on both the left and right sides of the turntable. When the trolley mounting brackets, each consisting of a rectangular guide plate protruding perpendicularly from the back of the channel that fits into the tension bone, are placed facing each other, two A dolly having casters can be placed via clevis-shaped vertical guides provided at both ends, and the turntable is raised and lowered and moved via the dolly mounting bracket by the action of a lever with this dolly as a fulcrum. A turntable for exhibition is constructed in such a way that it can be used.

(Function) As described above, in the device of the present invention, a turntable is rotatably provided with respect to a base frame, and a friction roller of a rotary drive device pivotally supported on the turntable side is a ring-shaped friction roller provided on the base frame. Since it has a small and simple structure in which it is pressed into contact with the turntable by spring force, the swing drive device can be placed within about 200 mm of the height of the turntable. Therefore, the entire device can be made small enough to be suitable for a general show room.

In addition, the rotation of the turntable is driven by pressing the friction roller against the ring-shaped friction guide by spring force, so if the turntable or the car loaded with it comes into contact with a human body etc. and encounters resistance, Harm can be prevented by causing the friction roller to slip.

Furthermore, the device of the present invention makes it possible to move the turntable by making a cart having casters detachable from the frame of the turntable, and by making the casters move up and down with respect to the turntable by the action of a screw. Therefore, the installation location can be changed easily and easily.

(Example) Hereinafter, an example of the apparatus of the present invention will be described with reference to the drawings. 1 in the figure is a turntable of the device of the present invention;
2 (see FIG. 1) is an exhibition car placed on a turntable 1.

The turntable 1 has a floor plate 1a having a circular planar shape.
is stretched, and its outer periphery is surrounded by a peripheral wall plate 1b having a height of 200 mm or less. 1c to 1g are floorboards 1
The tension bones 1c and 1d are stretched on the lower surface of the turntable 1, and the tension bones 1c and 1d are framed in a square shape at the center of the turntable 1, and the two tension bones 1e extend parallel to each other within the framework. 1h is a floor plate removably provided on the upper surface of the framework made up of the strength bones 1c and 1f.

Further, 3 (see Fig. 2) is a floor surface on which the device of the present invention is installed, 4 is a base plate of a base frame to be installed on the floor surface 3, and 5 is a ring 6 (see Fig. 4) attached to the center of the base plate 4. 7 is a shaft cylinder that rotatably fits into the central shaft 6, and 7a is a bush thereof. This barrel 7 is fixed to a mounting plate 9 fixed between the support bones 1e, 1e of the turntable 1 with bolts (not shown) via a seat plate 8 fixed to the upper end of the barrel 7. 10
is a thrust bearing interposed between the upper end surface of the central shaft 5 and the seat surface 8. Note that the space around this thrust bearing 10 is filled with grease 11.

Further, a friction guide 12 formed of a ring-shaped angle material is fixedly fixed to the base plate 4 by welding or the like with the central axis 5 as the center, and a roller 13 that rolls into contact with the horizontal plate portion 12a of the friction guide 12 is provided as described above. A shaft 14 is installed on the outside of each of the force bones 1c, 1c, 1d, and 1d framed in a square.
It is rotatably supported. 15 in Figure 5
16 is a collar, 17 is a ball bearing, and 18 is a C-shaped retaining ring.

Further, as shown in FIG. 3, triangular reinforcing plates 19 are provided at two opposing corners of the square framework so as to be in contact with the lower surface of the floor plate 1a. A bolt insertion hole 19a is formed in the reinforcing plate 19. and the fifth
As shown by the two-dot chain line in the figure, the bolt insertion hole 19
A nut 20 is welded on the base plate 4 directly below a, and when moving the device, which will be described later, the bolt 2
The turntable 1 and the base frame can be integrally coupled by inserting the turntable 1 into the bolt insertion hole 19a from above and screwing the threaded portion 21a at the lower end into the nut 20.

As shown in FIGS. 2, 3, and 7, the rotational drive device for the turntable 1 includes a clevis 22 protruding from the side surface of one of the force bones 1e, and a shaft 23 provided perpendicular to the clevis 22. Drive device 2
4 is pivotably supported horizontally. Reference numeral 25 designates a geared motor of the drive device 24, and a friction roller 26 is fixed to the output shaft of the geared motor 25. By tensioning a spring 27 between the bracket 24a protruding from the drive device 24 and the force bone 1d, The friction roller 26 is brought into pressure contact with the vertical wall surface 12b of the friction guide 12.

Note that the drive device 24 is a rotating turntable 1.
Geared motor 25
As shown in FIGS. 2, 4 and 6, two slip rings 29 are provided on the outer periphery of the lower end of the shaft cylinder 7 with an insulating cylinder 28 in between. 30 is a separate ring made of an insulator interposed between the slip rings 29. Reference numeral 31 (see FIG. 6) is a collector provided to be in sliding contact with the slip ring 29. The base of this collector 31 is held by a collector pole 32 fixed on the base plate 4, and is further connected to an external power source via a cord 33. It is possible to connect to. 34 (see Figure 2)
35 is a fuse inserted in the middle of the cord 33, 35 is an intermediate switch, and 36 is a plug.

The reason why the collectors 31 are provided in double form as shown in FIG. 6b is to improve the reliability of power supply.

Figures 8 to 13 show the device used to move the turntable.
(See Fig. 8) is a rectangular cylindrical member forming the main body of the truck. Square caster mounting plates 38 are fixed to both ends of the lower surface of this rectangular cylindrical member 37. Casters (swingable wheels) 39 are attached below the wheels 38, respectively.

Further, vertical plates 40 are fixed to both end faces of the square tubular member 37 in a downwardly extending state.
Clevis-shaped vertical guides 41 each made of two strip-shaped plates are protruded from the outside of the vertical plates 40 . Note that 42 is a roller support plate fixed to the upper surface of both ends of the rectangular cylindrical member 37, and the above-mentioned components form a truck 43 having casters for moving the turntable.

44 is a truck mounting bracket (see Figure 9) for attaching the truck 43 to the turntable 1;
5 is a channel formed so that it can be fitted from the side to the strength bone 1c of the turntable 1, and 46 is a channel 45 formed on the outer surface of the web of this channel 45.
The guide plate is a rectangular guide plate that protrudes across the carriage 43 and can be inserted between the clevis-shaped vertical guides 41 of the truck 43. Two pin insertion holes 46a and 46b are provided at the upper end of the guide plate 46 at appropriate vertical intervals.

Also, Figure 10 shows the lever 4 for raising and lowering the turntable.
7, 48 is a lever made of a round bar material, and two triangular plates 49 are attached to one end of the lever 48 so as to sandwich the lever 48 from both sides. It is fixed. A pin insertion hole 49a is provided at the most extreme end of the two triangular plates 49, and a roller 50 is pivotally supported by a shaft 51 at the apex corner of the triangular plate 49 whose base is on the lever 48 side. .

The pin 52 shown in FIG.
These are pins that can be inserted into holes a, 46b, and 49a, respectively.

Next, the operation of the apparatus of the present invention constructed as described above will be explained. This turntable 1 is installed, for example, on the floor of a show room, as shown in FIG. 1, and the exhibition car 2 is placed on it. To rotate the turntable 1, the plug 36 of the cord 35 shown in FIG. 2 is inserted into a power outlet (not shown), and the intermediate switch 35 is turned on. When the power source is connected, the geared motor 25 of the drive device 24 rotates, thereby causing the friction roller 26 to rotate counterclockwise in FIGS. 3 and 7. This friction roller 26 has a spring 27
Since the turntable 1 is in pressure contact with the ring-shaped friction guide 12 by the roller 26, the turntable 1 is moved by the friction drive by the roller 26.
It rotates clockwise on the base frame via four rollers 13 that are in rolling contact with the base frame.

In this case, if a human body comes into contact with the turntable 1 or the automobile 2 placed thereon and resistance increases, the friction roller 26 slips and stops the rotation of the turntable 1, which is safe.

That is, in FIG. 7, if the center of rotation of the turntable 1 is 0, the point of contact between the friction roller 26 and the friction guide 12 is P, and the thrust by the spring 27 is represented by a vector _F1 , then this
F ₁ can be decomposed into component forces of vectors F ₂ and F ₃ . In this case, F ₂ is a force that presses the roller 26 against the guide 12, and F ₃ becomes an internal stress within the drive device 24 and acts on the force bone 1e via the shaft 23.

Furthermore, if the tangential force due to the rotation of the friction roller 26 is expressed as a vector F ₄ , this F ₄ is a component force F ₅ ,
It becomes _F6 . Since F ₆ is in the opposite direction to the aforementioned component force F ₃ , it cancels out F ₃ , and since F ₅ is in the opposite direction to the aforementioned vector F ₁ , this
This will offset F ₁ .

Therefore, in a normal state where the rotational resistance of the turntable 1 is small, the driving torque is also small, so F ₄ is small, and F ₅ is also small accordingly.
Since the decreasing rate of F ₁ is small and F ₂ does not decrease much, the friction roller 26 can rotate the turntable 1 without slipping.

On the other hand, when the rotational resistance increases due to contact of the turntable 1 with another object, the driving torque increases within the performance range of the motor 25, so _F4 increases and _F5 also increases. growing.
As F ₅ increases, F ₁ decreases, so in the end F ₂
As a result, the friction roller 26 slips and stops the turntable 1. Therefore, there is no risk of harm to the human body, etc., and since no overload is applied to the motor 25, there is no risk of burnout.

Next, a method for moving the turntable 1 will be explained. First, remove the floor plate 1h shown in FIG. 3, insert the bolt 21 into the bolt insertion hole 19a from above, and screw the threaded part 21a of the bolt 21 into the nut 20 fixed to the base plate 4, as shown in FIG. by turntable 1
and the base frame.

Next, as shown in FIG.
The trolley mounting brackets 44 are fitted from the sides, and then the trolley 43 is fitted using the trolley mounting brackets 44 on both left and right sides as guides. That is, the guide plate 46 of the truck mounting bracket 44 is inserted into the gap between the clevis-shaped vertical guide 41 of the truck 43, so that the truck 4
Lower 3 to floor 3. FIG. 12 shows this state.

Next, the pin insertion hole 49a at the tip of the screw 47 is aligned with the hole 46a of the guide plate 46, and the pin 52 is inserted to attach the screw 47 as shown in FIG. By pushing down as shown by arrow A in FIG. 13, the turntable 1 is raised together with the base frame until the pin insertion hole 46b is exposed above the upper edge of the vertical guide 41, and the pin 52 is inserted into the hole 46b.
Insert.

In this way, the turntable 1 and the base frame are supported by the cart 43 in a slightly raised state above the floor surface 3, so the turntable 1 is supported by the four casters 39 of the cart 43. 1 can be simply and easily moved to a desired position.

Note that the operation of lowering the turntable 1 onto the floor surface 3 can be performed by performing the above-described operation in reverse, so the explanation will be omitted.

(Effects of the Invention) As described above, in the device of the present invention, the turntable 1 is rotatably provided on the base frame, and the friction roller 26 of the rotational drive device 24, which is pivotally supported on the turntable side, is provided on the base frame. Because it has a small and simple structure in which it is pressed against the ring-shaped friction guide 12 by a spring force, the swing drive device can be mounted at a height of about the height of the turntable 1.
Can be within 200mm. Therefore, it is possible to reduce the size of the entire device to a size suitable for a general show room.

Further, since the rotation of the turntable 1 is performed by pressing the friction roller 26 against the ring-shaped friction guide 12 by spring force, it is possible that the turntable 1 or the loaded car 2 comes into contact with a human body or the like and creates resistance. If the friction roller 26 is damaged, the friction roller 26 can be caused to slip to prevent harm, which is safe, and also prevents the drive motor from being overloaded and burnt out.

Furthermore, the device of the present invention allows a cart 43 having casters 39 to be attached to and detached from the frame of the turntable 1, and also allows the casters 39 to be moved up and down relative to the turntable 1 by the action of a screw 47. Since the table 1 is made movable, the installation location can be easily and easily changed.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing how the device of the present invention is used;
Fig. 2 is a vertical sectional elevation view of the device of the present invention, Fig. 3 is a plan view showing a partially cutaway floorboard, Fig. 4 is an elevational view showing a partially cutaway central shaft portion, and Fig. 5 is a roller FIG. 6a is an elevation view of the slip ring portion, FIG. 6b is a plan view thereof, FIG. 7 is an explanatory view of the operation of the drive device, and FIG. a
Figure 9 is an elevational view of the truck, figure b is its plan view, and figure 9 a.
is an elevational view of the trolley mounting bracket, and b is its plan view.
FIG. 10a is a front view of the screw, FIG. 10b is a side view thereof, FIG. 11 is a side view of the pin, and FIGS. 12 and 13 are action explanatory views. 1...Turntable, 2...Exhibition car,
3... Floor surface, 4... Base plate, 5... Center shaft, 12... Friction guide, 13... Roller, 24... Drive device, 25... Geared motor, 26... Friction roller, 27... ...Spring, 39...Caster, 43...Dolly, 44...
...Dolly mounting bracket, 47...Rump, 52...Pin.

Claims (1)

[Claims] 1. A turntable is rotatably provided with respect to a base frame, a rotational drive device having a friction roller is provided on the side of the turntable and pivoted by a vertical shaft, and a bracket protruding from this rotational drive device and a turntable are connected to each other. A spring is placed between the parts so that the friction roller is brought into pressure contact with a ring-shaped friction guide provided on the base frame, and the turntable and the base frame can be connected with bolts. The floor plate is partially removable to expose the framed tension bones on both the left and right sides of the structure, and a rectangular guide plate is installed perpendicularly on the back of the channel that fits into the exposed tension bones. When the trolley mounting brackets formed by the A turntable for exhibition, characterized in that the turntable can be moved up and down via the trolley mounting bracket by the action of a lever using the trolley as a fulcrum.