JPH0730425Y2 - Rotating mechanism of rotating stool - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an improvement of a rolling stool for a vehicle, such as a train, a bus or other vehicles, in which the direction of the stool for a vehicle can be reversed. The present invention relates to a rotating mechanism of.

[Conventional technology]

2. Description of the Related Art Conventionally, there has been used a rotating stool capable of turning a seat with respect to a traveling direction of a train, a bus, or another vehicle and facing a seat in a rear row, for example.

As shown in FIG. 11, this type of rotary stool rotation device rotates a pedestal frame 51 of a stool body composed of a backrest and a seat cushion, with a support plate 53 and a support plate 53 fixed to a floor surface. A rotary mechanism 55 composed of a plate 54 and a plate 54 rotatably pivots about a central axis 56 in the vertical direction as an axis, and the receiving plate 53 has several ball bearings 57.
A ball shaft 57 is rotatably interposed between the ball bearing 57 and the rotary plate 54, and the press ring 59 is attached to the footrest 52 by a mounting bolt 60 so as to be located on the outer periphery of the ball shaft 58. It had a fixed structure.

[Problems to be solved by the device]

However, the rotating device using the ball bearing of this type, if the ball shaft 58 does not roll smoothly when the rotating seat is turned,
Since the turning motion of the stool cannot be performed smoothly and an impact is generated during the turning, it is necessary to configure the rotating device with a reinforcing structure or a buffer structure, which complicates the structure and increases the number of parts. Had.

In addition, the casting-made rotating device also has a problem that the total weight of the machined rotating plate and the receiving plate increases.

The present invention has been made in view of the above problems, and has a simple structure and a reduced number of parts by interposing a liner without interposing a rotating device between an underframe and a leg. It is an object of the present invention to provide a rotation mechanism for a rotary stool that can reduce the weight.

[Means for Solving the Problems]

In order to achieve the above object, the rotating mechanism of the rotary stool according to the present invention is a rotary stool in which an underframe is rotatably supported on an upper surface of a pedestal on which a stool body is mounted. A circular opening is formed, and the upper and lower surfaces of the inner edge of the opening are sandwiched by a synthetic resin flat liner formed to have a diameter larger than that of the opening. The gist is that the pressing plates are overlapped and fixed so that they can be tightened and loosened so that the rotational force of the underframe with respect to the leg stand can be adjusted appropriately.

For example, one liner formed into a substantially disc shape having an outer diameter substantially the same as the inner diameter of the opening is fitted in the opening of the underframe, and the liner is arranged above and below the liner to form the base. With a structure in which two liners having a diameter larger than that of the opening are sandwiched between the upper and lower surfaces of the inner edge of the opening of the frame, a means for rotatably fixing the underframe can be provided.

The liner may be a liner that is annular and has a U-shaped vertical cross section, and the inner edge of the opening of the underframe may be fitted into the U-shaped liner.

[Action]

According to the above configuration, when the stool body is rotated, the underframe can be slid and rotated by the sliding action of the liner interposed between the upper surface of the pedestal and the lower surface of the pedestal, and the stool can be turned over. The strength of the rotational movement of the stool body can be adjusted by appropriately changing the tightening force of the plate.

Further, by fixing the liner on the pedestal, the underframe forming the stool body can be rotatably fixed on the pedestal.

〔Example〕

An embodiment of a rotating mechanism for a rotary seat according to the present invention will be described below with reference to the drawings.

1 and 2 show a rotary seat which constitutes a rotating mechanism according to the present invention.

Reference numeral 1 denotes a stool body in which an underframe 3 is horizontally rotatable with respect to a leg stand 2 fixed on a floor surface. A sitting hood 4 is placed on the upper surface of the underframe 3 and the underframe 3 is provided. A sleeve portion 6 which constitutes an armrest 5 is fixed to both sides of the armrest 5, a lower end portion of a backrest 7 is rotatably provided between the rear ends of the sleeve portion 6, and the upper end side is in the front-back direction (direction of arrow A). It can be tilted to change the standing angle.

3 to 6 show a first embodiment of the rotating mechanism of the rotary seat according to the present invention.

The rotating mechanism according to the present invention has a structure in which a synthetic resin liner 8 is interposed between the upper surface of the leg stand 2 and the lower surface of the underframe 3, and the seat body 1 is rotated by utilizing the sliding action of the liner 8. In this embodiment, the circular opening 9 is provided on the lower surface of the underframe 3 and the inner edge 9a of the opening 9 is formed in three liners, that is, the opening 9 formed on the lower surface of the underframe 3. A single liner 8a formed into a disc shape or an annular shape that is fitted and has at least a thickness equal to the plate thickness of the underframe 3 and an outer diameter substantially the same as the inner diameter of the opening 9. , Two liners 8b, 8b arranged above and below the liner 8a and formed to have a diameter larger than that of the opening 9 for sandwiching the upper and lower surfaces of the inner edge 9a of the opening 9 of the underframe 3
By sandwiching them in a sandwich shape, further by stacking a pressing plate 10 on top of the three liners 8a, 8b, and fixing the pressing plate 10 on the leg base 2 by fixing means 11 such as bolts and nuts. The liners 8a and 8b are fixed on the pedestal 2.

Thus, the underframe 3 has a structure in which it is fixed on the leg stand 2 by sandwiching the inner edge 9a of the opening 9 formed on the lower surface of the underframe 3 between the three liners 8a, 8b. The inner edge 9a of the opening 9 on the underframe 3 side
The shape of the liner 8b for sandwiching is not necessarily limited to the circular shape or the annular shape, and the opening 9 of the underframe 3 is appropriately used.
The inner edge 9a can also be configured to be able to be clamped in whole or in part.

FIG. 7 shows a second embodiment of the rotating mechanism according to the present invention.

In this embodiment, instead of the liners 8a and 8b in the first embodiment, annular step portions 12a and 12a are formed in the overlapping portions of the two liners 12, respectively, and these step portions 12a and 12a are formed. The inner edge 9a of the opening 9 of the underframe 3 is sandwiched in the groove 12b to be formed, and the liner 12 is fixed on the leg stand 2 by the pressing plate 13. If the liner 12 is configured in this way, the number of parts can be reduced, so that the assembling work can be speeded up. As shown in FIG. 8, an annular liner 13 may be used instead of the disc-shaped liner 12.

FIG. 9 shows a third embodiment of the rotating mechanism according to the present invention, and the structure different from that of the first embodiment will be described.

In this embodiment, the inner edge 9a of the opening 9 of the underframe 3 is held by a liner 14 formed in a U-shaped cross section, and the liner 14 is fixed on the leg stand 2 by a pressing ring 15. By constructing the liner 14 in such an annular shape having a U-shaped cross section, the work of assembling the underframe 3 to the leg base 2 can be simplified and the work efficiency can be improved.

FIG. 10 shows a fourth embodiment of the present invention, and a structure different from those of the first to third embodiments will be described.

In this embodiment, a holding plate 16 and a spacer 17 are used instead of the holding ring 15 disclosed as the third embodiment. That is, the liner 18 is fitted on the outer side of the circular spacer 17, and the liner 18 and the spacer 17 are fixed on the leg base 2 by the pressing plate 16. According to this structure, the clamping force of the liner 18 with respect to the inner edge 9 of the opening 9 of the underframe 3 can be adjusted by changing the thickness of the spacer 17 and appropriately adjusting the pressing force of the pressing plate 16 against the liner 18. The wear of the liner 18 can be dealt with.

[Effect of device]

Since the rotating mechanism of the rotary stool according to the present invention is configured as described above, it is substantially disk-shaped or entirely annular and has a vertical cross-sectional shape without interposing a special rotating device on the underframe and the footrest. The rotary stool can be configured using the character-shaped liner, the number of parts can be reduced, and the weight of the rotary stool can be reduced.

Further, since the liner made of synthetic resin is used for the rotating portion of the underframe on the leg stand, the rotating operation is smooth and no impact is generated when the seat body is turned.

Further, this liner has a feature that the strength of the rotational motion of the stool body can be appropriately adjusted by adjusting the fastening force of the bolts and nuts for fixing to the leg stand. Effect is extremely large.

[Brief description of drawings]

FIG. 1 is a side view showing a rotary seat constituting a rotating mechanism according to the present invention, FIG. 2 is a front view thereof, FIG. 3 is an explanatory view showing a first embodiment of the present invention, and FIG. 4 is the same. FIG. 5 is a plan view showing the rotating mechanism, FIG. 5 is a side view of the same, FIG. 6 is an enlarged view of a VI portion of FIG. 5, FIG. 7 is an explanatory view showing a second embodiment of the present invention, and FIG. FIG. 9 is an enlarged view of an essential part showing a third embodiment of the present invention, FIG. 10 is an enlarged view of an essential part of a fourth embodiment of the present invention, and FIG. 11 is a conventional ball bearing. FIG. 3 is a front cross-sectional view of a rotating device configured as. 1 ... seat main body, 2 ... leg base 3 ... stand frame, 4 ... sitting seat 7 ... backrest, 8a, 8b ... liner 9 ... opening, 9a ... inner edge 10 ... presser plate

Claims (3)

[Scope of utility model registration request] 1. A rotary stool in which an underframe is rotatably supported on an upper surface of a leg table on which a stool body is mounted, wherein a circular opening having a predetermined inner diameter is formed on a lower surface of the underframe, and an inner edge of the opening is formed. The upper and lower surfaces are configured to be sandwiched by a synthetic resin flat plate liner having a diameter larger than that of the opening, and a pressing plate is laid on the liner upper part, and the pressing plate can be tightened and loosened. A rotation mechanism for a rotary stool, wherein the rotation mechanism is fixed and is configured so that the rotational force of the underframe with respect to the leg base can be adjusted appropriately. 2. A single disk-shaped liner having an outer diameter substantially the same as the inner diameter of the opening is fitted into the opening of the underframe, and the liner is arranged above and below the liner. 2. The rotating mechanism for a rotary seat according to claim 1, wherein the upper and lower surfaces of the inner edge of the opening of the underframe sandwich two liners having a diameter larger than the opening. 3. The rotating mechanism for a rotary seat according to claim 1, wherein the inner edge of the opening of the underframe is sandwiched by an annular liner having a U-shaped vertical cross section.