Cart rotation device

Abstract

To provide a trolley rotation device that can keep the height of the rotating table low. [Solution] The trolley rotating device comprises a base, a rotating part, and a drive unit. The rotating part is located on the base and is configured to support a trolley and to rotate together with the supported trolley around a rotation axis that extends perpendicularly to the base. The drive unit is located on the base and radially outward from the rotation axis of the rotating part, and is configured to rotate the rotating part. The rotating part includes a rotating table having a top surface configured on which a trolley is supported, and a transmission unit provided at the radially outer end of the rotating table and configured to transmit the driving force of the drive unit to the rotating table. The upper vertical end of the transmission unit is further vertically away from the base than the top surface.

Description

Technical Field

[0001] The present disclosure relates to a carriage rotating device.

Background Art

[0002] Patent Document 1 discloses a carriage rotating device including a rotating table provided so as to be horizontally rotatable near the floor surface and configured to carry a carriage, and a positioning mechanism for positioning the rotating table at a predetermined angular position.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The carriage rotating device of Patent Document 1 does not consider anything about suppressing the height of the rotating table.

[0005] An object of the present disclosure is to provide a carriage rotating device capable of suppressing the height of the rotating table.

Means for Solving the Problems

[0006] The carriage rotating device according to one aspect of the present disclosure includes a base, a rotating part located on the base, on which a carriage is placed and which rotates about a rotation axis extending along the vertical direction with respect to the base together with the placed carriage, a driving part located on the base and outside the rotating part in the radial direction with respect to the rotation axis of the rotating part, for rotating the rotating part and wherein the rotating part includes a rotating table having a top surface configured to place the carriage, A transmission unit provided at the radially outer end of the rotary table and configured to transmit the driving force of the drive unit to the rotary table, Includes, The upper vertical end of the transmission section is further vertically from the base than the top surface. [Effects of the Invention]

[0007] According to this disclosure, a trolley rotation device can be realized that allows the height of the rotating table to be kept low. [Brief explanation of the drawing]

[0008] [Figure 1] A first perspective view showing a trolley rotating device according to one aspect of the present disclosure. [Figure 2] Figure 1 shows a side view of the trolley rotation device. [Figure 3] Figure 1 is a perspective view showing the base of the trolley rotation device. [Figure 4] A second perspective view showing the trolley rotation device of Figure 1. [Figure 5] Figure 1 is a perspective view showing the rotary table of the trolley rotating device. [Figure 6] A plan view showing the drive unit of the trolley rotation device in Figure 1 with the cover removed. [Figure 7] Figure 1 is a perspective view showing the connection between the ring rail of the trolley rotation device and the motor's wheel. [Figure 8] A plan view showing a portion of Figure 6. [Figure 9] A plan view showing a part of the trolley rotation device in Figure 1. [Modes for carrying out the invention]

[0009] An example of this disclosure is described below with reference to the accompanying drawings. The following description is essentially illustrative and does not limit this disclosure, its applications, or its uses. The accompanying drawings are schematic, and the illustrated configuration may differ from the actual product in terms of dimensional proportions, etc. In the following description, terms such as "approximately" or "about" mean that the values ​​or shapes that follow these terms include an acceptable margin of error as determined by a person skilled in the art.

[0010] A trolley rotating device 1 according to one aspect of the present disclosure, as shown in Figure 1, comprises a base 10, a rotating part 20 and a drive unit 30 located on the base 10. The rotating part 20 is configured to support a trolley 100 and to rotate together with the mounted trolley 100 around a rotation axis CL (shown in Figure 2) that extends vertically (for example, in the Z direction) relative to the base 10. The drive unit 30 is located radially outward (hereinafter referred to as radially) from the rotation axis CL of the rotating part 20 and is configured to rotate the rotating part 20.

[0011] The trolley rotating device 1 of this disclosure can be applied to various uses, including the rotation of a trolley 100. For example, if the trolley 100 is configured to transport bed components such as a bed frame, the trolley rotating device 1 can be used to clean the bed components while they remain on the trolley 100. By using the trolley rotating device 1, the bed components can be cleaned without removing them from the trolley 100, thereby reducing the workload of the cleaning work and shortening the cleaning time.

[0012] As shown in Figure 3, the base 10 has a substantially square plate shape with chamfered corners. In this embodiment, the base 10 is made of stainless steel, for example, and has substantially circular projections 11 and boss portions 12 provided at each corner. The projections 11 have a diameter smaller than the diameter of the rotary table 21 of the rotating part 20, which will be described later. Each boss portion 12 is substantially rectangular prism-shaped and has a screw hole on its upper vertical surface.

[0013] As shown in FIG. 4, the rotating part 20 includes a rotating table 21 and a transmission part 22 configured to transmit the driving force of the driving part 30 to the rotating table 21.

[0014] As shown in FIG. 1, the rotating table 21 has a top surface 211 configured to place the carriage 100 thereon. In this embodiment, the rotating table 21 is formed of, for example, stainless steel and has a load-bearing capacity of about 300 kg. As shown in FIG. 4, the rotating table 21 is in a substantially circular plate shape and is composed of a plurality of plate members. The plurality of plate members include a first member 23 and a plurality of second members 24 (in this embodiment, eight second members 24). The first member 23 is located at a position overlapping the rotation axis CL when viewed along the vertical direction and has a polygonal shape (for example, a substantially octagonal shape). The plurality of second members 24 each extend radially outward from the first member 23 and are arranged in contact with each other in the circumferential direction with respect to the rotation axis CL (hereinafter referred to as the circumferential direction). Each second member 24 has a substantially fan shape. Of both ends in the radial direction of each second member 24, the end close to the first member 23 is in contact with one side of the octagon of the first member 23. Each second member 24 is positioned by the first member 23.

[0015] In the main body embodiment, as shown in FIG. 5, a first wall portion 232 is provided over the entire circumference at the edge of the surface 231 of the first member 23 facing the base 10. A shaft member 233 is provided at the center of the first member 23. The rotation axis CL is located at the center of the shaft member 233. A second wall portion 242 is provided over the entire circumference at the edge of the surface 241 of each second member 24 facing the base 10. The first wall portion 232 and the second wall portion 242 are fixed by a fastening member 25 in a contact state. The space between the first member 23 and the second members 24 is sealed by a seal member (not shown). The second wall portions 242 of adjacent second members 24 are fixed by a fastening member 25 in a contact state. The space between adjacent second members 24 is sealed by a seal member (not shown). A notch 212 for accommodating the protrusion 11 of the base 10 is provided at the radially outer end of the second wall portion 242. The protrusion 11 of the base 10 prevents the intrusion of water or the like between the base 10 and the rotating table 21.

[0016] As shown in FIG. 4, the rotary table 21 is provided on the top surface 211 and has guide rails 213 for guiding the movement of the carriage 100. In this embodiment, the rotary table 21 is provided on the top surface 211 and has a pair of guide rails 213 spaced apart in the first direction (for example, the X direction) intersecting the vertical direction Z. Each guide rail 213 is composed of two plate members 214 extending along the second direction (for example, the Y direction) intersecting the vertical direction Z and the first direction X. The two plate members 214 are arranged with a gap 215 capable of accommodating the wheels 101 (see FIG. 2) of the carriage 100 and are fixed on the top surface 211. The rotation axis CL is located between the pair of guide rails 213. The distance W1 (see FIG. 6) between the pair of guide rails 213 is set corresponding to the distance W2 (see FIG. 2) between the pair of wheels 101 of the carriage 100. As an example, the shortest distance in the first direction X between the pair of guide rails 213 is defined as the distance W1. The center-to-center distance between the pair of wheels 101 is defined as the distance W2.

[0017] As shown in FIG. 6, the rotary table 21 has a plurality of ball casters 26. Each ball caster 26 is fixed to the rotary table 21 such that the ball portion contacts the base 10. The plurality of ball casters 26 includes a first ball caster 261 located at a position overlapping the guide rail 213 and a second ball caster 262 located at a position not overlapping the guide rail 213 when viewed along the vertical direction Z. In this embodiment, the first ball caster 261 is evenly fixed at a position overlapping the plate member 214 of the second member 24, and the second ball caster 262 is evenly fixed at a position not overlapping the guide rail 213 of the second member 24. As an example, two first ball casters 261 and one second ball caster 262 are fixed to one second member 24.

[0018] As shown in FIG. 4, the transmission part 22 is provided at the outer end in the radial direction of the rotary table 21. As shown in FIG. 2, the upper end 220 of the transmission part 22 in the vertical direction Z is farther from the base 10 in the vertical direction Z than the top surface 211.

[0019] In this embodiment, the transmission unit 22 has a ring rail 221 that surrounds the entire circumference of the rotary table 21. Gaps 222 are provided in the ring rail 221. For example, four gaps 222 are provided in the ring rail 221. Each gap 222 constitutes part of the passage 40 through which the trolley 100 moves between the outside of the rotary table 21 and the top surface 211.

[0020] As shown in Figure 7, the ring rail 221 is composed of a vertical member 223, a horizontal member 224, and a projection 225. The vertical member 223 extends upward in the vertical direction Z from the radially outer end of the rotary table 21. The horizontal member 224 extends horizontally (in other words, radially) and away from the rotation axis CL from the upper end of the vertical member 223 in the vertical direction Z. The upper end of the horizontal member 224 in the vertical direction Z constitutes the upper end 220 of the transmission unit 22. The projection 225 extends downward in the vertical direction Z from the horizontal tip of the horizontal member 224. A gap is formed between the lower vertical end of the projection 225 and the base 10. The length in the vertical direction Z between the lower end of the projection 225 and the base 10 is smaller than the diameter of the wheel 311 of the motor 31 of the drive unit 30, which will be described later. The wheels 311 are housed in the area enclosed by the base 10 and the ring rail 221, and the driving force of the motor 31 output from the wheels 311 is transmitted to the rotary table 21 via the ring rail 221.

[0021] As shown in Figures 4 and 6, the four gaps 222 are located at the points where the ring rail 221 and the guide rail 213 intersect, and the guide rail 213 and the slope 41 (described later) can be connected through the gaps 222.

[0022] As shown in Figure 6, the drive unit 30 includes, for example, a plurality of motors 31, located on the same side with respect to the virtual straight line L1 (for example, in region E1 shown in Figures 6 and 9). In this embodiment, the drive unit 30 includes three motors 31. Each motor 31, for example, has a wheel 311 fixed to an output shaft (see Figure 7) and is connected to the ring rail 221 via the wheel 311. The plurality of motors 31 are positioned such that at least one motor 31 is connected to the ring rail 221 regardless of the position of the gap 222. In this embodiment, the plurality of motors 31 are spaced apart in the circumferential direction, and as shown in Figure 8, the spacing D1 and D2 between adjacent motors 31 is greater than the circumferential length D3 of the gap 222. For example, of the three motors 31, D1 is the spacing between the middle motor 31 and the motor 31 located above the middle motor 31 in Figure 8, and D2 is the spacing between the middle motor 31 and the motor 31 located below the middle motor 31 in Figure 8. The three motors 31 are positioned such that the spacing D1 is greater than the spacing D2. In other words, the relationship D1 > D2 > D3 exists. For example, let spacing D1 and D2 be the distances between the rotation axes of adjacent motors 31. At least one of spacing D1 and spacing D2 must be greater than the length D3 of the gap 222.

[0023] As shown in Figure 2, the three motors 31 are covered by a cover 32. The cover 32 is configured such that its upper end 321 in the vertical Z direction is closer to the base 10 than the bottom surface 102 of the trolley 100 when it is resting on the top surface 211. This prevents, for example, the rotation of the trolley 100 from being hindered by loads that protrude from the trolley 100.

[0024] As shown in Figure 6, the passage section 40 includes a slope 41 having an inclined surface 411. The slope 41 is provided at the radially outer end of the rotary table 21. The inclined surface 411 slopes in a direction approaching the base 10 from the top surface 211 in the vertical direction Z as it moves away from the rotary table 21 in the radial direction (e.g., second direction Y). In this embodiment, the passage section 40 includes four slopes 41 extending along the second direction Y. As shown in Figure 9, each slope 41 extends along a virtual straight line L1 and has an inclined surface 411 and a plane 412 connecting the inclined surface 411 and the top surface 211. By positioning a pair of guide rails 213 parallel to the virtual straight line L1 extending radially through the rotation axis CL, the pair of guide rails 213, four gaps 222, and four slopes 41 constitute the passage section 40.

[0025] Let D4 be the radius of the rotating table 21, and D5 be the length of the inclined surface 411 of the slope 41. The slope 41 is configured such that the ratio of the length D5 of the inclined surface 411 to the radius D4 of the rotating table 21 is in the range of 0.16 to 0.71. For example, if the radius of the rotating table 21 is D4 = 700 mm, the slope 41 will have an inclined surface 411 with a length of D5 = 113 mm to 497 mm. For example, if the height H of the top surface 211 relative to the installation surface 200 (see Figure 2) is 20 mm to 30 mm, the inclination angle of the inclined surface 411 will be approximately 2.3 degrees to approximately 10.0 degrees, and the ratio of the height H of the top surface 211 to the radius D4 of the rotating table 21 will be approximately 0.03 to approximately 0.04.

[0026] In this embodiment, the trolley rotating device 1 includes a sensor 50 for detecting the position of the rotary table 21 and a driven caster 60, as shown in Figure 6. The sensor 50 includes, for example, a photoelectric sensor and, as shown in Figure 6, is circumferentially adjacent to the middle motor 31 of the three motors 31 of the drive unit 30. The sensor 50 detects, for example, the position where a pair of guide rails 213 are parallel to a virtual straight line L1. The driven caster 60 is located on the side of the base 10 opposite to the drive unit 30 with respect to the virtual straight line L1 (for example, in region E2 shown in Figures 6 and 9) and is configured to support the ring rail 221. The driven caster 60 ensures smooth rotation of the rotary table 21.

[0027] The trolley rotation device 1 can provide the following effects:

[0028] The trolley rotating device 1 comprises a base 10, a rotating part 20, and a drive unit 30. The rotating part 20 is located on the base 10 and is configured to support a trolley 100 and to rotate together with the trolley 100 around a rotation axis CL that extends vertically in the Z direction relative to the base 10. The drive unit 30 is located on the base 10 and radially outward from the rotation axis CL of the rotating part 20, and is configured to rotate the rotating part 20. The rotating part 20 includes a rotary table 21 having a top surface 211 on which the trolley 100 is mounted, and a transmission part 22 provided at the radially outer end of the rotary table 21 and configured to transmit the driving force of the drive unit 30 to the rotary table 21. The upper end 220 of the transmission part 22 vertically in the Z direction is further away from the base 10 vertically in the Z direction than the top surface 211. This configuration allows the height of the rotary table 21 to be kept low. By positioning the drive unit 30 radially outward from the rotation axis CL of the rotating unit 20, the required torque of the drive unit 30 can be reduced compared to when the drive unit 30 is positioned on the rotation axis CL.

[0029] For example, if the height of the rotating table is increased, the ramp for loading the trolley onto the rotating table will need to be longer or the slope of the ramp will become steeper, which may increase the force required to load the trolley onto the rotating table and increase the risk of the trolley tipping over. For example, if the height of the rotating table is kept low by excavating the installation surface, the installation location will be limited and installation costs may increase.

[0030] The transmission unit 22 has a ring rail 221 that surrounds the entire circumference of the rotary table 21. The ring rail 221 is provided with a gap 222 that forms a passage 40 through which the trolley 100 moves between the outside of the rotary table 21 and the top surface 211. This configuration makes it possible to more reliably realize a trolley rotation device 1 that can keep the height of the rotary table 21 low.

[0031] The drive unit 30 includes a plurality of motors 31. The plurality of motors 31 are positioned such that at least one motor 31 is connected to the ring rail 221, regardless of the position of the gap 222. This configuration makes it possible to more reliably realize a trolley rotating device 1 that can keep the height of the rotary table 21 low.

[0032] Multiple motors 31 are positioned on the same side with respect to a virtual straight line L1 that passes through the rotation axis CL and extends radially. This configuration allows for miniaturization of the trolley rotation device 1.

[0033] The passage section 40 includes a slope 41 having an inclined surface 411 that slopes in the vertical direction Z toward approaching the base 10 from the top surface 211 as it moves away from the rotary table 21 in the radial direction. The ratio of the length D5 of the inclined surface 411 to the radius D4 of the rotary table 21 is in the range of 0.16 to 0.71. With this configuration, a trolley rotating device 1 that can keep the height of the rotary table 21 low can be realized more reliably.

[0034] The rotating table 21 has multiple ball casters 26 that contact the base 10. This configuration makes it possible to more reliably realize a trolley rotating device 1 that can keep the height of the rotating table 21 low.

[0035] The rotating table 21 is provided on its top surface 211 and has a guide rail 213 that guides the movement of the trolley 100. The multiple ball casters 26 include a first ball caster 261 that is positioned to overlap with the guide rail 213 when viewed along the vertical direction Z, and a second ball caster 262 that is positioned not to overlap with the guide rail 213. With this configuration, a trolley rotating device 1 can be more reliably realized that can withstand the load when the trolley 100 is placed on the rotating table 21 while keeping the height of the rotating table 21 low.

[0036] The rotary table 21 is composed of multiple plate members. The multiple plate members include a first member 23 positioned to coincide with the rotation axis CL when viewed along the vertical direction Z, and a plurality of second members 24, each extending radially outward from the first member 23 and arranged in a manner that contacts the rotation axis CL in the circumferential direction. Each of the plurality of second members 24 is positioned by the first member 23. With this configuration, the plate thickness of the rotary table 21 can be reduced compared to the case where the rotary table 21 is formed from a single plate. As a result, a trolley rotating device 1 that can reduce weight while keeping the height of the rotary table 21 low can be realized more reliably.

[0037] The trolley rotation device 1 is equipped with a sensor 50 that detects the position of the rotating table 21. For example, by detecting the position in which a pair of guide rails 213 are parallel to a virtual straight line L1 using the sensor 50, the movement of the trolley 100 between the outside of the rotating table 21 and its top surface 211 can be facilitated.

[0038] The trolley rotation device 1 can be configured as follows:

[0039] The trolley rotating device 1 may be configured such that the rotating section 20 includes a rotating table 21 and a ramp 41 having an inclined surface 411, and the ratio of the length D5 of the inclined surface 411 to the radius D4 of the rotating table 21 is in the range of 0.16 to 0.71. In this case, the transmission section 22 can be omitted. This configuration also allows the height of the rotating table 21 to be kept low.

[0040] The transmission unit 22 is not limited to having a ring rail 221; it can employ any configuration to transmit the driving force of the drive unit 30 to the rotary table 21. For example, the rotary table 21 does not have to have a ball caster 26, nor does it have to be composed of multiple members.

[0041] The number of ball casters 26, the arrangement of the ball casters 26, the shape of the first member 23, the number of second members 24, the number of gaps 222, the shape of the gaps 222, and the position of the gaps 222 can be changed according to the design of the trolley rotating device 1, etc. For example, depending on the number, shape, and position of the gaps 222, the ring rail 221 may consist of one member or multiple members.

[0042] The drive unit 30 is not limited to including multiple motors 31; it can employ any configuration that rotates the rotating unit 20. For example, the number and arrangement of the motors 31 can be changed according to the design of the trolley rotating device 1.

[0043] Sensor 50 can be omitted.

[0044] Various aspects of this disclosure will be described below.

[0045] The trolley rotating device 1 in the first embodiment is Bass and, A rotating part is located on the base on which a trolley is placed, and which rotates together with the placed trolley around a rotation axis that extends perpendicularly to the base, A drive unit that rotates the rotating part is located on the base and radially outward from the rotation axis of the rotating part. Equipped with, The rotating part, A rotating table having a top surface configured on which the aforementioned trolley can be placed, A transmission unit provided at the radially outer end of the rotary table and configured to transmit the driving force of the drive unit to the rotary table, Includes, The upper vertical end of the transmission section is further vertically from the base than the top surface.

[0046] The trolley rotating device 1 of the second embodiment is, in the trolley rotating device 1 of the first embodiment, The transmission unit has a ring rail that surrounds the entire circumference of the rotary table, The ring rail is provided with a gap that forms a passage through which the trolley moves between the outside of the rotating table and the top surface.

[0047] The trolley rotating device 1 of the third embodiment is, in the trolley rotating device of the second embodiment, The drive unit includes a plurality of motors, The plurality of motors are positioned such that at least one motor is connected to the ring rail, regardless of the position of the gap.

[0048] The trolley rotating device 1 of the fourth embodiment is, in the trolley rotating device of the third embodiment, The aforementioned multiple motors are located on the same side with respect to a virtual straight line that passes through the rotation axis and extends in the radial direction.

[0049] The trolley rotating device 1 of the fifth embodiment is a trolley rotating device of any of the second to fourth embodiments, The passage portion includes a slope having an inclined surface that slopes in a direction approaching the base from the top surface in the vertical direction as it moves away from the rotating table in the radial direction, The ratio of the length of the inclined surface to the radius of the rotating table is in the range of 0.16 to 0.71.

[0050] The trolley rotating device 1 of the sixth embodiment is a trolley rotating device of any of the first to fifth embodiments, The rotary table has a plurality of ball casters that contact the base.

[0051] The trolley rotating device 1 of the seventh embodiment is, in the trolley rotating device of the sixth embodiment, The rotating table has guide rails provided on its top surface that guide the movement of the trolley, The plurality of ball casters include a first ball caster located in a position that overlaps with the guide rail when viewed along the vertical direction, and a second ball caster located in a position that does not overlap with the guide rail.

[0052] The trolley rotating device 1 of the eighth embodiment is, in the trolley rotating device of the seventh embodiment, The aforementioned rotary table is composed of multiple plate members, The aforementioned plurality of plate members, A first member located at a position that coincides with the rotation axis when viewed along the vertical direction, Each of the second members extends radially outward from the first member and is arranged in a manner that contacts the rotation axis in the circumferential direction. Includes, Each of the plurality of second members is positioned by the first member.

[0053] The trolley rotating device 1 of the ninth embodiment is a trolley rotating device of any of the first to eighth embodiments, The system includes a sensor for detecting the position of the rotary table.

[0054] The trolley rotating device 1 of the tenth embodiment is Bass and, A rotating part is located on the base on which a trolley is placed, and which rotates together with the placed trolley around a rotation axis that extends perpendicularly to the base, A drive unit that rotates the rotating part is located on the base and radially outward from the rotation axis of the rotating part. Equipped with, The rotating part, A rotating table having a top surface configured on which the aforementioned trolley can be placed, A slope provided at the radially outer end of the rotating table, having an inclined surface that slopes in a direction that approaches the base from the top surface in the vertical direction as it moves away from the top surface in the radial direction, and Includes, The ratio of the length of the inclined surface to the radius of the rotating table is in the range of 0.16 to 0.71.

[0055] The embodiments and variations of this disclosure can be combined with each other, or with each other, or with each other. Features included in the embodiments and variations of this disclosure can also be combined with each other.

[0056] As will be apparent to those skilled in the art, many modifications and variations of this disclosure can be realized without departing from the scope and spirit of this disclosure. This disclosure is limited only by the terms of the claims, along with the entire scope of the equivalents to which the claims are entitled. [Explanation of Symbols]

[0057] 1. Trolley rotation device 10 base 11 Protrusions 12 Boss Section 20 Rotating part 21 Rotating Table 211 Top surface 212 Notch 213 Guide rail 214 Plate members 215 gap 22 Transmission section 220 Upper end 221 Ring Rail 222 gap 223 Vertical member 224 Horizontal member 225 Protrusion 23 First Member 231 sides 232 1st wall section 233 Shaft member 24 Second Member 241 sides 242 2nd wall section 25 Fastening members 26 Ball Caster 261 First Ball Caster 262 Second Ball Caster 30 Drive unit 31 Motor 311 Wheels 32 Cover 321 Upper end 40 Passage section 41 Slope 411 Slope 412 plane 50 sensors 60 Driven caster 100 carts 101 Wheels 102 Bottom 200 Installation surface

Claims

1. Bass and, A rotating part is located on the base on which a trolley is placed, and which rotates together with the placed trolley around a rotation axis that extends perpendicularly to the base, A drive unit that rotates the rotating part is located on the base and radially outward from the rotation axis of the rotating part. Equipped with, The rotating part, A rotating table having a top surface configured on which the aforementioned trolley can be placed, A transmission unit provided at the radially outer end of the rotary table and configured to transmit the driving force of the drive unit to the rotary table, Includes, A trolley rotating device in which the upper vertical end of the transmission section is further vertically from the base than the top surface.

2. The transmission unit has a ring rail that surrounds the entire circumference of the rotary table, The trolley rotating device according to claim 1, wherein the ring rail is provided with a gap that constitutes a passage for the trolley to move between the outside of the rotating table and the top surface.

3. The drive unit includes a plurality of motors, The trolley rotating device according to claim 2, wherein the plurality of motors are positioned such that at least one motor is connected to the ring rail, regardless of the position of the gap.

4. The trolley rotating device according to claim 3, wherein the plurality of motors are located on the same side with respect to a virtual straight line extending radially through the rotation axis.

5. The passage portion includes a slope having an inclined surface that slopes in a direction approaching the base from the top surface in the vertical direction as it moves away from the rotating table in the radial direction, The trolley rotating device according to any one of claims 2 to 4, wherein the ratio of the length of the inclined surface to the radius of the rotating table is in the range of 0.16 to 0.

71.

6. The trolley rotating device according to claim 1, wherein the rotating table has a plurality of ball casters that contact the base.

7. The rotating table has guide rails provided on its top surface that guide the movement of the trolley, The trolley rotating device according to claim 6, wherein the plurality of ball casters include a first ball caster positioned to overlap with the guide rail when viewed along the vertical direction, and a second ball caster positioned not to overlap with the guide rail.

8. The aforementioned rotary table is composed of multiple plate members, The aforementioned plurality of plate members, A first member located at a position that coincides with the rotation axis when viewed along the vertical direction, Each of the second members extends radially outward from the first member and is arranged in a manner that contacts the rotation axis in the circumferential direction. Includes, The trolley rotating device according to claim 7, wherein each of the plurality of second members is positioned by the first member.

9. The trolley rotating device according to claim 1, further comprising a sensor for detecting the position of the rotating table.

10. Bass and, A rotating part is located on the base on which a trolley is placed, and which rotates together with the placed trolley around a rotation axis that extends perpendicularly to the base, A drive unit that rotates the rotating part is located on the base and radially outward from the rotation axis of the rotating part. Equipped with, The rotating part, A rotating table having a top surface configured on which the aforementioned trolley can be placed, A slope provided at the radially outer end of the rotating table, having an inclined surface that slopes in a direction that approaches the base from the top surface in the vertical direction as it moves away from the top surface in the radial direction, and Includes, A trolley rotating device in which the ratio of the length of the inclined surface to the radius of the rotating table is in the range of 0.16 to 0.71.

Images