turntable

Abstract

To provide a low height turntable. [Solution] The turntable (1) comprises a rotating shaft holding base (10) installed at the center of rotation, a support side portion (2) having an inner circular frame (20) having a first circular frame (21) in an annular shape and a first positioning portion (23), a second circular frame (31) in an annular shape with an inner diameter larger than that of the first circular frame (21), an outer circular frame (30) having a second positioning portion (32), and a slope (40), a rotating side portion (3) supported by the rotating shaft holding base (10), rotating around the center of rotation, and having a rotating plate (50) that holds a moving member that runs on the first circular frame (21) and the second circular frame (31), a rotating means (60) that comes into contact with the rotating plate (50) and rotates the rotating plate (50), a control means that drives and controls the rotating means (60), and an operating portion (70) that operates the control means, and the support side portion (2) is installed directly on the installation surface of the turntable (1).

Description

[Technical Field]

[0001] The present invention relates to a turntable for changing the direction of a vehicle. [Background technology]

[0002] Turntables are known for changing the direction of large vehicles during tunnel construction work. For example, Patent Document 1 discloses a turntable in which a rotating means rotates a rotating disk supported rotatably around a rotation axis on a base placed on the ground.

[0003] Although such turntables can be installed simply by transporting them to a flat installation location, the problem is that the base has a certain thickness, making it impossible to lower the height from the ground to the surface of the turntable on which the vehicle wheels ride. This has made it particularly difficult to utilize such turntables in tunnel construction, where height restrictions from the ground exist. A conventional solution to this problem has been to excavate a hole (depression) called a pit in the ground to lower the relative height of the turntable. However, digging a pit is expensive, and excavating a pit is not possible in some locations.

[0004] Therefore, there was a demand for technology that could lower the height of the turntable itself (the height from the surface of the installation location to the surface of the turntable on which the wheels ride) without having to excavate the ground, such as in a pit. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-96728 Summary of the Invention [Problem to be solved by the invention]

[0006] Therefore, in view of the above-mentioned circumstances, an object of the present invention is to provide a turntable with a low height. [Means for solving the problem]

[0007] In order to solve the above problems, the turntable according to the present invention is "A rotating shaft holder installed at the center of rotation, an inner circular frame including a first circular frame having an annular shape with the rotating shaft holder contacting an inner peripheral side of the annular shape, and a first positioning portion contacting an outer peripheral side of the first circular frame and positioning the first circular frame; a second circular frame having an annular shape with an inner diameter larger than that of the first circular frame; and an outer circular frame having a second positioning portion connected to the inner peripheral side of the second circular frame and sandwiching the first positioning portion from both sides to position the first positioning portion; a ramp attached to the outer circular frame; a support side portion comprising: a rotating plate supported by a rotating shaft holder, rotating about the rotation center, and holding a moving member that travels on the first circular frame and the second circular frame; a rotating side portion comprising: a rotating means disposed on a side of the rotating side portion and in contact with the rotating plate to rotate the rotating plate; a control means for controlling the driving of the rotating means; an operation unit for operating the control means; and The support side is placed directly on the surface on which the turntable is placed.

[0008] The turntable of this configuration consists of a support side portion and a rotating side portion on which a vehicle is placed and rotates. The support side portion does not have a base like conventional turntables, but is installed directly on the installation surface of the turntable. Therefore, since the turntable does not have a base, there is no thickness of the base, and it is possible to provide a turntable that is lower in height than conventional turntables.

[0009] Furthermore, since it does not require a stand, it is lightweight and can be advantageously transported by cart to the installation surface of the turntable. Furthermore, since components such as stands are not required, the cost of the stands can be reduced. Furthermore, since the rotating shaft holder, inner circular frame, and outer circular frame are configured to be in contact with each other, the turntable can be easily installed in the correct position by simply installing either the rotating shaft holder, inner circular frame, or outer circular frame in the correct installation position for the turntable. Furthermore, since the structure of the rotating plate is simple, it is possible to reduce the weight of the rotating plate and reduce the cost of the rotating plate. [Effects of the Invention]

[0010] As described above, according to the present invention, since a stand is not required, the height of the turntable itself can be lowered, and since excavation of the ground is not required, an inexpensive turntable can be provided. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a perspective view of a turntable according to one embodiment of the present invention. [Figure 2] FIG. 2 is an exploded perspective view of a turntable according to an embodiment of the present invention. [Figure 3] FIG. 3 is a plan view of the support side of the turntable according to one embodiment of the present invention. [Figure 4] FIG. 4 is a cross-sectional view taken along line AA in FIG. [Figure 5] FIG. 5 is a plan view of the rotating side of a turntable according to an embodiment of the present invention, viewed from the rear side. [Figure 6] 6A is an enlarged cross-sectional view of the range M in FIG. 3, (b) is an external view seen from the direction along line BB in (a), and (c) is an external view seen from the direction along line CC in (a). [Figure 7] 7 is an external view of a turntable according to an embodiment of the present invention as seen from the forward and backward direction, with a portion thereof being a cross-sectional view taken along line DD in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0012] A turntable according to a specific embodiment of the present invention and the procedure for installing the turntable will be described below with reference to the drawings. Hereinafter, the terms "upper" and "lower" will be used based on the installed state of the turntable. Furthermore, the direction in which a vehicle moves in and out based on the installed state of the turntable will be referred to as the "advance / retract direction." Furthermore, the planar direction perpendicular to the "advance / retract direction" will be referred to as the "width direction." Furthermore, the position that is the center of rotation of the turntable will be referred to as the "rotation center."

[0013] First, the turntable 1 will be described with reference to Figures 1 to 7. Figure 1 is a perspective view of the turntable 1 according to one embodiment of the present invention, and Figure 2 is an exploded perspective view of the turntable 1. The turntable 1 of this embodiment includes a rotary shaft holder 10, an inner circular frame 20, an outer circular frame 30, a slope 40, a rotary plate 50, a rotating means 60, an operating unit 70, and a control means.

[0014] The turntable 1 of this embodiment is roughly divided into a support side portion 2 that is placed directly on the installation surface G of the turntable 1, and a rotation side portion 3 that rotates while the vehicle T is placed on it. The support side portion 2 includes a rotation shaft holder 10, an inner circular frame 20, an outer circular frame 30, and a slope 40. The rotation side portion 3 includes a rotation plate 50. Note that a rotation means 60 and an operation unit 70 may also be provided on the support side portion 2.

[0015] First, the configuration of the support side part 2 will be described. The support side part 2 is made up of a rotary shaft holder 10, a circular frame 20, a positioning frame 30, and a slope 40, which are shown as the support side part 2 in Fig. 2. Note that a rotation means 60 may also be included in the support side part 2. Fig. 3 is a plan view of the support side part 2 in a state before the rotary plate 50 is attached to the turntable 1. Fig. 4 is a cross-sectional view taken along line AA in Fig. 3.

[0016] The rotating shaft holder 10 comprises a holder 11, a rotating shaft fixing portion 12, a thrust plate 13, an oil-less bushing 14, and a housing 15. The rotating shaft holder 10 is installed at a position that becomes the rotation center of the turntable 1. The material of the rotating shaft holder 10, except for the thrust plate 13 and the oil-less bushing 14, is steel, for example, general structural rolled steel (SS steel).

[0017] The support base 11 includes a beam plate 11a and a plurality of legs 11b that support the beam plate 11a and contact the ground. The beam plate 11a has a generally cross shape in plan view, with two wide plates that intersect at right angles at the center of rotation of the turntable 1. The four ends of the beam plate 11a are formed in an arc shape. The legs 11b are a plurality (three in this embodiment) of columnar members provided on the back surface of the beam plate 11a that are orthogonal to each other. The ends of each leg 11b are formed in an arc shape to match the supporting beam plate 11a.

[0018] The rotating shaft fixing portion 12 has a rotating shaft holding portion 12a and a rotating shaft core 12b. The rotating shaft holding portion 12a is a trapezoidal portion that is fixed onto the beam plate 11a of the holding base 11 with bolts. The rotating shaft core 12b is a cylindrical member that protrudes upward from the center of the rotating shaft holding portion 12a. When the rotating shaft holding portion 12a is fixed to the holding base 11, the center of the rotating shaft core 12b is positioned so that it becomes the center of rotation of the turntable 1. A mark such as a reference depression may be provided at the center of the rotating shaft core 12b.

[0019] The thrust plate 13 is a bearing such as a ball bearing having an annular shape and an internal hole. The thrust plate 13 is attached to the rotary shaft holder 12a with the rotary shaft core 12b inserted into the internal hole of the thrust plate 13.

[0020] The oilless bushing 14 is a cylindrical sliding bearing that has a self-lubricating function and does not require oil supply. The oilless bushing 14 is attached by inserting the rotary shaft core 12b into the inner hole of the oilless bushing 14.

[0021] The housing 15 includes a lower cylindrical portion 15a and a holder-side annular plate 15b. The lower cylindrical portion 15a is cylindrical with an internal hole, and the rotation shaft 12b is inserted into the internal hole of the lower cylindrical portion 15a, with the OILES bushing 14 housed within, and is attached to the thrust plate 13. The holder-side annular plate 15b is an annular plate that expands radially outward from the upper end of the lower cylindrical portion 15a, and is provided with multiple bolt insertion holes. The upper surface of the holder-side annular plate 15b is attached to a cover-side annular plate 51a2 of the rotating plate 50, which will be described later.

[0022] The inner circular frame 20 includes a first circular frame 21 and a first positioning portion 23 .

[0023] The first circular frame 21 includes an annular rail 21a and an inner ring member 21b. The annular rail 21a is a hollow, annular-shaped member formed by welding two endless sidewall annular members with different inner diameters that form the side walls on both sides of the annular rail 21a, an endless bottom annular plate that forms the bottom surface, and an endless upper annular plate that forms the top surface. The inner ring members 21b are two endless ring members with different inner diameters that are arranged inside the hollow of the annular rail 21a, and are arranged with a gap in the hollow interior. The inner ring members 21b are arranged with R-chamfered upper and lower opposing surfaces across the gap. This allows the load from the top surface of the annular rail 21a to be dispersed. The gap in the annular rail 21a formed by the inner ring members 21b may be replaced with another inner ring member 21b instead of being an empty space.

[0024] The first circular frame 21 is configured so that the four arc-shaped ends of the beam plate 11a of the support base 11 contact and fit into the inner peripheral surface of the side wall of the side wall circular member. The side wall circular member is made of steel, for example, high-tensile steel (Herten steel). The bottom circular plate and the upper circular plate are made of steel, for example, rolled steel for welded structures (SM steel). The inner ring member 21b is made of steel, for example, SS steel.

[0025] The first positioning portion 23 includes first positioning beams 23a and first connecting beams 23b. The first positioning beams 23a are multiple beams extending in the forward / backward direction, contact the outer peripheral surface of the side wall of the side wall annular member of the first circular frame 21, and are arranged in parallel at intervals in the width direction. The first positioning beams 23a are formed with a length and shape such that one end contacts the outer peripheral surface of the side wall annular member of the first circular frame 21. The other end of the first positioning beam 23a has a first fixed end 23a1 that can be fixed with a bolt or the like. The first connecting beams 23b are multiple frames that are perpendicular to the first positioning beams 23a and span and connect the first positioning beams 23a. The first positioning portion 23 is made of steel, for example, stainless steel.

[0026] The outer circular frame 30 includes a second circular frame 31, a second positioning portion 32, a third positioning portion 33, and an entrance / retraction opening plate .

[0027] The second circular frame 31 is an annular frame with an inner diameter larger than that of the first circular frame 21, and has the same structure as the first circular frame 21 except that the inner diameter is larger than that of the first circular frame 21. The second circular frame 31 is arranged concentrically with the first circular frame 21. The outer circular frame 30 is made of the same material as the inner circular frame 20.

[0028] The second positioning portion 32 includes a second positioning beam 32a and a second connecting beam 32b. The second positioning beams 32a are provided on the inner peripheral surface of the side wall of the outer circular frame 30, and are arranged in parallel at intervals at positions corresponding to the first positioning beams 23a. The second positioning beams 32a are formed with a length and shape such that one end contacts the inner peripheral surface of the side wall circular member of the second circular frame 31. The other end of the second positioning beam 32a has a second fixed end 32a1 that can be fixed to the first fixed end 23a1 of the first positioning beam 23a with a bolt or the like. The second connecting beams 32b are multiple frames that are perpendicular to the second positioning beams 32a and span and connect the second positioning beams 32a. The second positioning portion 32 is positioned by clamping the first positioning portion 23 of the inner circular frame 20 from both sides, and is fixed by fastening the first fixed end 23a1 and the second fixed end 32a1 with a bolt.

[0029] The third positioning portion 33 includes a third positioning beam 33a and a third connecting beam 33b. The third positioning beams 33a extend in the forward / backward direction and are arranged in parallel at intervals below a portion (a running path portion 53 of the rotating plate 50 described later) along which the wheels of the vehicle T run when the vehicle T rides on the turntable 1.

[0030] The third positioning beam 33a is formed to have a length and shape that allows it to contact the outer peripheral surface of the side wall annular member of the second circular frame 31. The third connecting beam 33b is a frame that is perpendicular to the third positioning beams 33a and bridges and connects the positioning beams 33a.

[0031] The entrance / exit plate 34 is located at the entrance and exit through which the wheels of the vehicle T travel when the vehicle T rides on the turntable 1. The entrance / exit plate 34 is a rectangular plate arranged in the entrance / exit direction, with the center side of the turntable 1 cut out in an arc shape that can accommodate the rotating plate 50 described below. The entrance / exit plate 34 is supported by pillars 34a so that when the rotating plate 50 described below is installed, the upper surface of the rotating plate 50 (traveling plate 53a of the travel path section 53 described below) and the upper surface of the entrance / exit plate 34 are at the same height. The pillars 34a that support the entrance / exit plate 34 are preferably made of H-shaped steel or the like. The pillars 34a that support the entrance / exit plate 34 are installed on the third positioning beam 33a or the third connecting beam 33b and fixed with bolts or the like.

[0032] The second positioning portion 32, the third positioning portion 33, and the entrance / exit plate 34 are made of steel, for example, stainless steel.

[0033] The ramp 40 includes a top portion 41 and an inclined portion 42. The ramp 40 is attached to the entrance and exit positions of the vehicle T, which correspond to the direction of travel of the entrance / exit plate 34 of the outer circular frame 30, and is secured with pins or the like. The top portion 41 is the highest point of the ramp 40 above the installation surface G. When the ramp 40 is attached to the entrance / exit plate 34 of the outer circular frame 30, the top portion 41 is in contact with the upper surface of the entrance / exit plate 34, and is generally flush with the surface. The inclined portion 42 forms an inclined surface at an angle that allows the vehicle T to climb up, and smoothly connects to the upper surface of the top portion 41. The angle of the inclined portion 42 is preferably approximately 10°. A plurality of pillars 43, formed of H-shaped steel or the like, are provided on the backsides of the top portion 41 and the inclined portion 42. The pillars 43 are connected to a bottom plate 44, which is placed on the installation surface G, and support the top portion 41 and the inclined portion 42. The ramp 40 is made of steel, for example, stainless steel.

[0034] Next, the configuration of the rotating side part 3 will be described. The rotating side part 3 is made up of a rotating plate 50, which is shown as the rotating side part 3 in Fig. 2. In Fig. 2, the structure of the back side of part of the rotating plate 50 is shown by dashed lines. Figs. 1 and 2 show perspective views of the front side of the rotating plate 50. Fig. 5 is a plan view of the rotating plate 50 of the rotating side part 3 as seen from the back side.

[0035] The rotating plate 50 has a central portion 51, two running path portions 53, two outer circular portions 57, and an outer circumferential wall 59. The rotating plate 50 has a circular shape in a plan view, and is arranged in five parallel rows along the forward / backward direction: the central portion 51, two running path portions 53 formed adjacent to the central portion 51 on both sides in the width direction, and two outer circular portions 57 formed adjacent to the running path portions 51 on both sides in the width direction. The rotating plate 50 is attached to the rotating shaft holder 10 and covers the rotating shaft holder 10 and parts of the inner circular frame 20 and the outer circular frame 30. The rotating plate 50 is made of steel, for example, stainless steel.

[0036] The central portion 51 includes a cover portion 51a on the upper surface, a lower inner frame portion 51b, and a plurality of pillars connecting the cover portion 51a and the lower inner frame portion 51b. The central portion 51 is a portion where the center of rotation of the rotating plate 50 is located.

[0037] The cover portion 51a has an elongated shape in the forward / backward direction, with both ends formed in an arc shape. The upper portion of the cover portion 51a protrudes at a height corresponding to a lower inner frame portion 51b (described later). The protruding portion is formed at a height such that the protruding portion does not come into contact with the underside of the chassis of the vehicle T when the vehicle T rides on the rotating plate 50. The cover portion 51a includes an upper cylindrical portion 51a1 that hangs down from the rear surface of the cover portion 51a at the rotation center of the cover portion 51a, and a cover-side circular plate 51a2 that extends outward from the lower end of the upper cylindrical portion 51a1. The upper cylindrical portion 51a1 is a cylindrical member centered on the rotation center and serves as the rotation shaft. The cover-side circular plate 51a2 has insertion holes that correspond to the insertion holes of the holder-side circular plate 15b of the rotating shaft holder 10. The lower surface of the cover-side circular plate 51a2 is connected to the upper surface of the holder-side circular plate 15b and then attached and fixed with bolts or the like. The upper cylindrical portion 51a1 and the cover side circular plate 51a2 connected to the holding base side circular plate 15b are not limited to the above shapes, and a plate may be provided to span the cover portion 51a in the width direction, and the upper surface of the holding base side circular plate 15b may be brought into contact with the lower surface of the plate and attached using bolts or the like.

[0038] The lower inner frame portion 51b is a frame body formed below the cover portion 51a at a distance from the cover portion 51a, and is formed by welding two longitudinal beams 51b1 that are spaced apart in the width direction and extend in the forward / backward direction, and short beams 51b2 that connect the two longitudinal beams 51b1 and extend in the width direction. The cover portion 51a and the lower inner frame portion 51b are connected via a plurality of pillars (not shown). The pillars are preferably H-shaped steel.

[0039] The running path section 53 includes a running plate 53a, an inner moving member holding section 53b, an outer moving member holding section 53c, a lower outer frame section 53d formed below the running plate 53a at a distance from the running plate 53a, and a plurality of pillars 53e connecting the running plate 53a and the lower outer frame section 53d.

[0040] The traveling plate 53a extends in the forward / backward direction and is formed with a length that allows the front and rear wheels of the vehicle T to run onto its upper surface. Both ends of the traveling plate 53a in the forward / backward direction, where the vehicle T enters, are formed in an arc shape that corresponds to the notches in the entrance / exit plate 34 of the outer circular frame 30, and the surface of the traveling plate 53a is at approximately the same height as the surface of the entrance / exit plate 34. In addition, the traveling plate 53a has width stop walls 55 that are erected along the forward / backward direction at its widthwise ends to guide the wheels of the vehicle T that have run onto the plate and prevent them from running off.

[0041] The inner moving member holding portion 53b is a semicircular space provided on the back surface of the running plate 53a, and is an annular space formed by two semicircular walls with different radii. The inner moving member holding portion 53b is provided at a position corresponding to the first circular frame 21 of the inner circular frame 20 when the rotating plate 50 is attached to the rotating shaft holder 10. A moving member 56 is attached to the back surface of the running plate 53a in the inner moving member holding portion 53b. The moving member 56 can rotate on the first circular frame 21 as the rotating plate 50 rotates. An example of the moving member 56 is a tilt tank. The lower surface of the roller of the tilt tank protrudes downward from the lower end of the lower outer frame portion 53d, which is the lower end of the rotating plate 50, and is attached to the back surface of the running plate 53a. When the rotating plate 50 is attached to the rotating shaft holder 10, the tilt tank comes into contact with the upper surface of the first circular frame 21 of the inner circular frame 20 and rotates and moves on the upper surface of the first circular frame 21.

[0042] The outer moving member holding portion 53c is a semicircular space provided on the back surface of the running plate 53a, and is an annular space formed by two arc-shaped walls with different radii. The outer moving member holding portion 53c is provided at a position corresponding to the second circular frame 31 of the outer circular frame 30 when the rotating plate 50 is attached to the rotating shaft holder 10. A moving member 56 is attached to the back surface of the running plate 53a in the outer moving member holding portion 53c. The moving member 56 can rotate on the second circular frame 31 as the rotating plate 50 rotates. An example of the moving member 56 is a tilt tank. The lower surface of the roller of the tilt tank protrudes downward from the lower end of the lower outer frame portion 53d, which is the lower end of the rotating plate 50, and is attached to the back surface of the running plate 53a. When the rotating plate 50 is attached to the rotating shaft holder 10, the tilt tank comes into contact with the upper surface of the second circular frame 31 of the outer circular frame 30 and rotates and moves on the upper surface of the second circular frame 31.

[0043] The lower outer frame portion 53d includes outer frame longitudinal beams 53d1 extending in the forward / backward direction. The lower outer frame portion 53d is preferably provided at the same height as the lower inner frame portion 51b of the center portion 51. The lower outer frame portion 53d has a strength sufficient to support the weight of a vehicle T stopped on the running path portion 53 of the rotating plate 50. The running plate 53a and the lower outer frame portion 53d are connected via a plurality of pillars 53e. The pillars 53e are preferably H-shaped steel.

[0044] The outer circular portion 57 includes an outer circular plate 57a, a retaining plate 57b, and multiple pillars 57c. The outer circular plate 57a has a shape obtained by cutting a circle along a straight line in the forward / backward direction and is provided in the width direction of the running path portion 53 via a width stop wall 55 of the running path portion 53. The retaining plate 57b is a plate that holds the outer circular plate 57a and is connected to the upper surface of the outer circular plate 57a and the wall of the width stop wall 55 to hold the outer circular plate 57a. The retaining plate 57b is a member having a substantially right-angled triangle shape when viewed from the side in the forward / backward direction. The multiple pillars 57c are provided on the back surface of the outer circular plate 57a and are connected by welding or the like to the inner circumferential wall surface of an outer circumferential wall 59 (described later) to support the outer circular plate 57a.

[0045] The outer circumferential wall 59 is a circular circumferential wall that endlessly surrounds the entire outer peripheral end of the central portion 51, the running path portion 53, and the outer circular portion 57 that form the rotating plate 50. The vertical length of the outer circumferential wall 59 (the thickness of the rotating plate 50 formed by the outer circumferential wall 59) is formed to be the same as or slightly longer than the length of the pillars 53e provided on the running path portion 53 and the pillars 57c provided on the outer circular portion 57, and is formed to be shorter than the lower end of the moving member 56 attached to the inner moving member holding portion 53b or the outer moving member holding portion 53c.

[0046] Next, the rotation means 60 that rotates the rotating plate 50 will be described. Figs. 1 and 2 show perspective views of the rotation means 60. Fig. 3 shows a plan view of the rotation means. Fig. 6(a) is an enlarged view of the area M around the rotation means 60 shown in Fig. 3. Fig. 6(b) is an external view taken along line BB in Fig. 6(a), and Fig. 6(c) is an external view taken along line CC in Fig. 6(a). The rotation means 60 includes a rotation means fixing plate 61, a motor 62, a chain unit 63, a drive unit 64, a drive unit fixing unit 65, a drive unit pressing unit 66, and a sensor 67. The rotation means 60 are provided at two locations, with the center of rotation being point-symmetric. The two rotation means 60 are controlled to operate in unison.

[0047] The rotation means fixing plate 61 is a plate-shaped member, and in one example, is connected to and attached to the outer periphery of the second circular frame 31 of the outer circular frame 30 and to the third positioning beam 33a of the third positioning part 33. A motor 62 and a drive unit fixing part 65, which will be described later, are fixed to the upper surface of the rotation means fixing plate 61 with bolts or the like.

[0048] The motor 62 includes a brake-equipped geared motor 62a, a motor shaft (not shown), a meshing bevel gear (not shown), a motor sprocket shaft 62c, and a motor sprocket 62d. The brake-equipped geared motor 62a has a horizontally oriented rotational axis and generates rotational force when driven. The motor shaft is a horizontally oriented rotational axis with one end attached to the brake-equipped geared motor 62a. One of the meshing bevel gears is fixed to the opposite end of the motor shaft on the brake-equipped geared motor 62a side. The other of the meshing bevel gears is attached to one end of the motor sprocket shaft 62c, and the horizontal rotation of the brake-equipped geared motor 62a corresponds to vertical rotation. The motor sprocket shaft 62c is oriented vertically (up and down) and rotates on a vertical rotational axis due to the meshing bevel gear. The motor sprocket 62d is a gear having a plurality of teeth, and is fixed to the end opposite to the end to which the bevel gear of the motor sprocket shaft 62c is attached, and rotates on a vertical rotation axis.

[0049] The chain portion 63 is wound around a motor sprocket 62 d of the motor 62 and drive shaft sprockets 64 a of each of two drive portions 64 (described later), and transmits the rotation of the motor 62 to the drive portions 64 .

[0050] The drive unit 64 includes a drive shaft sprocket 64a, a drive shaft 64b, a rotation pressing unit 64c, and a drive frame 64d. Two drive units 64 are arranged in one rotation means 60. The bottoms of the two drive units 64 are not fixed to the rotation means fixing plate 61, but are positioned in the vicinity of the outer circumferential wall 59 of the rotation plate 50. The two drive units 64 that make up the rotation means 60 have approximately the same configuration.

[0051] The drive shaft sprocket 64a is a gear around which the chain portion 63 is wound. The drive shaft sprocket 64a rotates on a vertical axis of rotation via the chain portion 63. The drive shaft 64b is a vertically extending axis of rotation, and the drive shaft sprocket 64a is attached to its upper end to rotate. The lower end is held in a through-hole provided in the lower wall of a drive frame 64d (described later). The rotation pressing portion 64c includes an axial portion made of copper or the like attached to the drive shaft 64b, and a pressing portion made of hard rubber that covers the periphery of the axial portion. An example of the rotation pressing portion 64c is a drive roller. The rotation pressing portion 64c rotates around the drive shaft 64b as its rotation axis. The rotation pressing portion 64c contacts and presses the outer circumferential wall 59 due to pressure from a drive portion pressing portion 66 (described later), causing the rotating plate 50 to rotate.

[0052] The drive frame 64d includes an open housing portion 64d1 capable of holding the rotary pressing portion 64c and a fixed arm portion 64d2. The open housing portion 64d1 has four sides, two of which are closed and two of which are open. The open housing portion 64d1 has through-holes in its upper and lower walls, and a rotary bearing such as a bearing is disposed around the through-hole, to which the drive shaft 64b is rotatably attached. The open housing portion 64d1 contains the rotary pressing portion 64c attached to the drive shaft 64b, protruding from the two open sides. The fixed arm portion 64d2 is attached to one of the adjacent closed side walls of the open housing portion 64d1, facing the other drive unit 64 constituting the rotation means 60. The fixed arm portion 64d2 extends horizontally and has a through-hole at its tip into which the fixing shaft 65b of the drive unit fixing portion 65 (described later) can be inserted. The fixed arm portion 64d2 is formed to have a height that is staggered with that of the fixed arm portion 64d2 from the other drive unit 64. The other closed side wall of the open housing portion 64d1 is disposed so as to face the rotating plate 50 with the rotation pressing portion 64c in between, and is pressed by the drive unit pressing portion 66 described below.

[0053] The drive unit fixing portion 65 includes a fixing shaft fixing plate 65a and a fixing shaft 65b. The drive unit fixing portion 65 is located approximately midway between the two drive units 64 constituting the rotation means 60. The fixing shaft fixing plate 65a is fixed to the rotation means fixing plate 61 with bolts or the like, and the fixing shaft 65b is attached and held at its upper portion. The fixing shaft 65b is a rod-shaped member extending vertically. The fixing shaft 65b is inserted alternately into the through-holes of the fixing arm portions 64d2 of the two drive units 64 constituting the rotation means 60, and its upper end is fixed by an end plate or the like. By attaching the fixing arm portions 64d2 of the two drive units 64 to the drive unit fixing portion 65, the two drive units 64 can move only within a predetermined range around the fixing shaft 65b as a fixed axis. Note that a drive unit fixing oiles bushing may be provided on the fixing shaft 65b at a position facing the through-hole of the fixing arm portion 64d2.

[0054] The drive unit pressing portion 66 includes a pressing portion fixing portion 66a, a pressing portion 66b, and a spring portion 66c. The pressing portion fixing portion 66a is a member that holds the pressing portion 66b on its upper surface. The drive unit pressing portion 66 is fixed with a bolt or the like at a position facing the rotating plate 50 of the rotation means fixing plate 61 with the drive unit 64 in between. The pressing portion 66b is in contact with the side wall of the drive unit 64. The spring portion 66c applies a predetermined elastic force to the pressing portion 66b, causing the pressing portion 66b to press the side wall of the drive unit 64 toward the rotating plate 50 with a predetermined force. This pressing force presses the rotation pressing portion 64c against the outer circumferential wall 59 on the side of the rotating plate 50 with a predetermined pressing force.

[0055] The rotational drive force of the rotating means 60 is transmitted to the motor sprocket 62d in the vertical direction by the rotational drive of the brake-equipped geared motor 62a. The chain portion 63 is wound around the motor sprocket 62d and the drive shaft sprockets 64a of the two drive portions 64 that make up the rotating means 60, so that the rotational drive force of the motor sprocket 62d is transmitted to the drive shaft sprocket 64a. As the drive shaft sprockets 64a rotate, the rotation pressing portions 64c of each of the two drive portions 64 rotate. The rotation pressing portions 64c of the two drive portions 64 abut and press against the outer circumferential wall 59 of the rotating plate 50 at two spaced apart locations via the drive portion pressing portions 66. As each rotation pressing portion 64c rotates, it presses against the outer circumferential wall 59, causing the rotating plate 50 to rotate.

[0056] The sensor 67 is a detector such as a limit switch. The sensor 67 is provided at a position where its measurement surface contacts the rotating plate 50, and is capable of measuring the amount of rotation of the rotating plate 50, so that the amount of rotation of the rotating plate 50 can be detected based on the value of the sensor 67. In one example, the sensor 67 is fixed to the rotating means fixing plate 61 of the rotating means 60, but is not limited to this and may be provided at any position as long as it can measure the amount of rotation of the rotating plate 50.

[0057] Next, the operation unit 70 will be described. FIG. 7 is an external view of a turntable according to an embodiment of the present invention, viewed from the forward / backward direction. A portion of the view is a cross-sectional view taken along line DD in FIG. 3. The operation unit 70 includes a stand 71 and a switch 72. The stand 71 holds the switch 72 and is attached, for example, to the side of the third positioning portion 33 of the outer circular frame 30. The stand 71 is a hollow pole member, and electrical wiring (not shown) connected to the operation unit 70 is routed inside the pole member. The switch 72 includes a housing 72a housing a switch and a button 72b provided on the operation surface of the housing 72a. The switch 72 is located in a position where a user can reach it from the driver's seat by opening the window and operate the button 72b when the vehicle T is parked on the turntable 1. Therefore, the operation unit 70 is installed in two locations that are point-symmetrical with respect to the center of rotation of the rotating plate 50. The operation unit 70 does not have to be provided on the third positioning portion 33 as long as it does not interfere with the rotary plate 50 and the user can reach it from the driver's seat by opening the window. The pole member of the stand 71 may have any shape as long as the switch unit 72 is within reach of the user from the driver's seat by opening the window. The switch unit 72 may also be provided with two buttons 72b to allow the user to select whether the rotary plate 50 should be rotated forward or backward.

[0058] Next, we will describe the control means that controls and drives the turntable 1. The control means includes a control panel (not shown) that stores a control program for the turntable 1, and a power supply that supplies electricity to the turntable 1. The control panel, power supply, two rotation means 60, two operation units 70, and sensor 67 are connected by electrical wiring (not shown). The control means may be provided at any position on the turntable 1 or outside the turntable 1.

[0059] When button 72b provided on operation unit 70 is pressed, the control panel of the control means drives the two rotation means 60 in cooperation to rotate the rotary plate 50. At this time, the control panel is programmed so that when rotary plate control button 72b provided on operation unit 70 is pressed, rotary plate 50 rotates 180 degrees and then automatically stops. Next, when button 72b is pressed, rotary plate 50 may be rotated 180 degrees in the same direction as the previous rotation, or may be rotated 180 degrees in the opposite direction.

[0060] Next, we will explain the installation procedure for the turntable 1 of this embodiment. The installation procedure for the turntable 1 includes a concrete pouring step, an outer circular frame installation step, an inner circular frame installation step, a rotating shaft holder installation step, a rotating plate installation step, a rotating means installation step, an operation unit installation step, and a slope installation step.

[0061] The concrete pouring step is a step of pouring concrete at the location where the turntable 1 is installed so that the surface of the concrete is flat.

[0062] In the outer circular frame installation process, the outer circular frame 30 is transported to the installation site of the turntable 1 where concrete has been poured, and the outer circular frame 30 is installed at a position where the rotation axis 12b of the turntable 1 becomes the center of rotation. After the outer circular frame 30 is installed in the correct position, a flat plate-shaped fixing plate 80 or the like is fixed to the back surface of the outer circular frame 30, and the fixing plate 80 is fixed to the concrete using anchor bolts.

[0063] In the inner circular frame installation process, the inner circular frame 20 is transported to the location where the outer circular frame 30 has been installed, and is fitted in such a way that the first fixed end 23a1 of the first positioning beam 23a of the inner circular frame 20 contacts the second fixed end 32a1 of the second positioning beam 32a of the outer circular frame 30. Note that the inner circular frame 20 does not need to be fixed in place after just being fitted in, but it may also be fixed to concrete using a fixing plate and anchor bolts as necessary.

[0064] In the rotating shaft holder installation process, the rotating shaft holder 10 is transported and fitted so that the holder 11 contacts the inner periphery of the inner circular frame 20. The rotating shaft holder 10 does not need to be fixed in place after just being fitted in place, but it may be fixed to the concrete using a fixing plate and anchor bolts as necessary.

[0065] In the rotating plate installation process, the rotating plate 50 is transported, and the moving member 56 provided on the inner moving member holding portion 53b of the rotating plate 50 is placed in contact with the first circular frame 21 of the inner circular frame 20, and the moving member 56 provided on the outer moving member holding portion 53c is placed in contact with the second circular frame 31 of the outer circular frame 30, and the cover side circular plate 51a2 of the rotating plate 50 and the holding base side circular plate 15b of the rotating shaft holding base 10 are attached and fixed with bolts.

[0066] In the rotation means installation step, the rotation means 60 is transported, and the rotation means fixing plate 61 of the rotation means 60 is connected and attached to the outer periphery of the second circular frame 31 of the outer circular frame 30 and the third positioning beam 33b of the third positioning part 33. Then, the pressing forces of the drive unit pressing parts 66 are adjusted so that the rotation pressing parts 64c of each of the two drive units 64 constituting the rotation means 60 apply a predetermined pressing force to the outer circumferential wall 59 of the rotation plate 50.

[0067] In the operation unit installation process, the operation unit 70 is transported and attached to the side of the third positioning portion 33 of the outer circular frame 30, at a position that is reachable from the driver's seat when the car rides up on the turntable 1.

[0068] In the ramp installation process, the ramp 40 is transported and fixed by bringing the top 41 of the ramp 40 into contact with the entrance / exit plate 34 of the outer circular frame 30.

[0069] In each step, the control means, the rotation means 60, the operation unit 70 and the sensor 67 are connected by electrical wiring as necessary.

[0070] By following the above procedure, the turntable 1 can be placed in the installation position.

[0071] Although the above procedure illustrates a method in which the outer circular frame 30 is first installed and fixed at the installation location of the turntable 1, it is also possible to first install and position the rotating shaft holder 10 or the inner circular frame 20 at the installation location of the turntable 1, and then install and position the other support side parts 2. When fixing the support side parts 2, i.e., the rotating shaft holder 10, the inner circular frame 20, and the outer circular frame 30, at the installation location of the turntable 1, fixing plate members are provided at the bottom and fixed with anchor bolts, but this fixing plate member may increase the height of the turntable 1 by the amount of the height of the fixing plate members. The outer circular frame 30 is positioned so that it does not come into contact with the bottom of the rotating plate 50 when the rotating plate 50 is attached, and therefore a fixing plate member can be easily provided in a position that does not affect the height of the turntable 1 (the height from the installation surface G of the turntable 1 to the surface of the running plate 53a of the rotating plate 50). Therefore, it is preferable to first install and fix the outer circular frame 30 at the installation location of the turntable 1, and then install the turntable 1 without inserting and fixing the other support side parts 2, as this makes the height of the turntable 1 lower and easier to install.

[0072] Furthermore, although the method of installing the operation unit 70 at the installation location has been exemplified, it may also be attached directly to the outer circular frame 30, transported to the installation location, and installed together with the outer circular frame 30. Furthermore, the operation unit 70 may be placed directly in a predetermined position at the installation location without being attached to the outer circular frame 30, as long as the switch unit 72 of the operation unit 70 is located within reach from the driver's seat. Furthermore, the ramp 40 may also be attached to the outer circular frame 30 at the stage when the outer circular frame 30 has been installed.

[0073] Next, the operation of the turntable 1 of this embodiment will be described. When a vehicle T enters the turntable 1 from the slope 40, the wheels of the vehicle T ride up onto the travel plate 53a of the travel path portion 53 of the rotating plate 50 and stop. A user in the vehicle T reaches out the window to the operation unit 70 and presses the button 72b provided on the switch unit 72 of the operation unit 70, causing the rotation means 60 to rotate, and the rotation pressing portion 64c of the rotation means 60 presses the outer circumferential wall 59 of the rotating plate 50, causing the rotating plate 50 to rotate. When the rotating plate 50 rotates 180 degrees, it is detected by the sensor 67 and automatically stops. This operation allows the vehicle T to reverse in the direction opposite to the direction of entry, allowing the vehicle T to exit in the opposite direction from which it rode up.

[0074] Next, we will describe the case where, after vehicle T has exited, the next vehicle T enters the turntable 1 from the slope 40 and stops on the running plate 53a of the rotating plate 50. The direction in which vehicle T enters at this time does not have to be the same as the direction in which the vehicle T that previously operated the turntable 1 entered. When the user of the next vehicle T similarly presses button 72b on the operation unit 70, the rotating plate 50 rotates 180 degrees and automatically stops upon detection by the sensor 67. The rotation direction may be the same as or different from the previous rotation direction. This operation also allows the next vehicle T to reverse, allowing vehicle T to exit in the direction opposite to the direction in which it climbed up.

[0075] As described above, according to the turntable 1 of this embodiment, the support side portions 2, namely the rotary shaft holder 10, the inner circular frame 20, the outer circular frame 30, and the slope 40, are installed directly on the installation surface G of the turntable 1. This makes it possible to reduce the height from the installation surface G of the turntable 1 to the surface of the running plate 53a of the rotating plate 50, on which the wheels of the vehicle T using the turntable 1 ride. Therefore, the height of the turntable 1 itself can be reduced without digging the ground, such as in a pit, and the effort and cost of digging the ground is not required.

[0076] Furthermore, since it does not have a stand like a conventional turntable, it is light in weight, which is advantageous for transportation, and it also helps reduce the cost of components such as stands.

[0077] Furthermore, the turntable 1 of this embodiment is configured so that the rotating shaft holder 10, inner circular frame 20, and outer circular frame 30 are in contact with each other, so that the turntable 1 can be easily installed in an accurate position by simply installing any one of the rotating shaft holder 10, inner circular frame 20, and outer circular frame 30 in the correct installation position for the turntable 1. In particular, by fixing the outer circular frame 30 in a position that does not affect the height of the turntable 1 and then fitting the other inner circular frame 20 and rotating shaft fixing portion 10, the height of the turntable 1 can be further reduced.

[0078] Furthermore, the turntable 1 of this embodiment has two rotation means 60 arranged point-symmetrically. Since the two rotation means 60 are driven in cooperation with each other, even a heavy vehicle T can be easily rotated.

[0079] Furthermore, the rotation means 60 is provided on the outer periphery of the rotating plate 50. This simplifies the structure of the rotating plate 50 and reduces the weight of the rotating plate 50. Furthermore, the size of the rotation means 60 does not affect the height of the turntable 1, allowing the turntable 1 to be formed lower.

[0080] The present invention has been described above by citing a preferred embodiment, but the present invention is not limited to this embodiment, and various improvements and design changes are possible as described below, without departing from the spirit of the present invention.

[0081] For example, although the rotating shaft holder 10, inner circular frame 20, outer circular frame 30, and slope 40 constituting the support side portion 2 have been described as separate components, at least two of them may be formed as a single unit. For example, the connecting portions of the outer circular frame 30 and slope 40 may be connected as a single unit by welding or other means. Alternatively, a portion of each component may be integrated with another component. For example, the four ends of the holder 11 that contact the inner circumferential surface of the side wall of the side wall annular member of the inner circular frame 20 may be connected as a single unit by welding or other means, and the rotating shaft holder 12a and other components attached to the holder 11 with bolts may be components of the rotating shaft holder 10. In this manner, in this embodiment, some or all of the components constituting the support side portion 2 may be integrated with the connected members.

[0082] Furthermore, although the central portion 51 has a protruding shape, it does not have to have a protruding shape as long as the height of the cover portion 51a is approximately the same as the height of the travel path portion 53 described below when the cover-side annular plate 51a2 and the holder-side annular plate 15b are connected and fixed. In this case, a width stop wall 55 may be erected along the forward / backward direction as a boundary between the central portion 51 and the travel path portion 53.

[0083] For example, the rotation pressing portion 64c is not limited to a drive roller, and may be, for example, a tire. The tire may be, for example, two unique tires inserted on the drive shaft 64b. Although a tilt tank is exemplified as the moving member 56, other moving members 56 such as a tilt roller may be used as long as they can support the rotating plate 50 and the vehicle T and move.

[0084] Furthermore, although the above example illustrates a method in which the rotation pressing portion 64c presses the outer circumferential wall 59 of the rotating plate 50, any form may be used as long as it is possible to apply force to the side surface of the rotating plate 50 and rotate the rotating plate 50. For example, meshable teeth may be provided on the rear surface of the rotating plate 50, and a motor sprocket 62d may be directly attached to one end of a motor shaft connected to the brake-equipped geared motor 62a of the rotating means 60, so that the teeth on the rear surface of the rotating plate 50 mesh with the teeth of the motor sprocket 62d to drive the rotating plate 50.

[0085] Furthermore, in the above, the rotation means fixing plate 61 is attached by connecting it to the outer periphery of the second circular frame 31 of the outer circular frame 30 and the third positioning beam 33a of the third positioning portion 33, but it may be attached in any position as long as the rotation means 60 can be installed in a position where the rotation pressing portion 64c can press the outer circumferential wall 59 of the rotation plate 50 and rotate the rotation plate 50.

[0086] In addition, in the above example, the operation unit 70 is provided on the vehicle T with a right-hand drive, but if the user's vehicle T has a left-hand drive, the operation unit 70 may be provided accordingly. Alternatively, the operation unit 70 may be provided in four locations so that the vehicle T can be used with either a right-hand drive or a left-hand drive.

[0087] In addition, in the above example, the user operates the button 72b of the operation unit 70 having the stand portion 71 from the vehicle T, but the operation unit 70 may be provided outside the vehicle T and operated. Also, the operation unit 70 may be operable using a radio or the like, so that the rotation of the rotating plate 50 can be controlled from either inside or outside the vehicle T. [Explanation of symbols]

[0088] 1 turntable 2 Support Side 3 Rotating side 10 Rotating shaft holder 20 Inner circular frame 21 First circular frame 23 First positioning part 30 outer circular frame 31 Second circular frame 32 Second positioning part 40 Slope 50 Rotating Plate 56 Moving parts 60 Rotation means 70 Operation section G Installation surface

Claims

[Claim 1] a rotation axis holder installed at the rotation center; an inner circular frame including a first circular frame having an annular shape with the rotating shaft holder contacting an inner peripheral side of the annular shape, and a first positioning portion contacting an outer peripheral side of the first circular frame and positioning the first circular frame; a second circular frame having an annular shape with an inner diameter larger than that of the first circular frame; and an outer circular frame having a second positioning portion connected to the inner peripheral side of the second circular frame and sandwiching the first positioning portion from both sides to position the first positioning portion; a ramp attached to the outer circular frame; a support side portion comprising: a rotating plate supported by a rotating shaft holder, rotating about the rotation center, and holding a moving member that travels on the first circular frame and the second circular frame; a rotating side portion comprising: a rotating means disposed on a side of the rotating side portion and in contact with the rotating plate to rotate the rotating plate; a control means for controlling the driving of the rotating means; an operation unit for operating the control means; and The support side is directly placed on the installation surface of the turntable. A turntable characterized by:

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