JP7546451B2 - Seating device - Google Patents

Description

The present invention relates to a seating device.

Patent Document 1 discloses a technology for air conditioning a room by providing an air passage in the backrest of a seat that is installed on the floor of a theater or hall, and passing conditioned air from an air passage under the floor through the air passage in the backrest and blowing it out from the top of the backrest to the outside.

Japanese Patent Application Publication No. 8-154771

The inventors of the present application considered applying the above air conditioning technology to vehicles and the like equipped with rotatable seats, but the seats in Patent Document 1 were installed in a non-rotatable manner, and the above air conditioning technology could not be directly applied to vehicles with rotatable seats.

The present invention aims to provide a rotatable seat device that is provided with an air conditioning vent passage through which conditioned air is guided from the floor side.

The present invention relates to a seat device comprising a base portion to be placed on a floor, and an underframe supported on the base portion so as to be horizontally rotatable, supporting a seat portion and a backrest, wherein an air conditioning vent is provided from under the underframe, passing under the seat portion and inside the backrest to the outside of the backrest, the air conditioning vent includes a duct extending from under the underframe to the seat side, the duct being configured by fitting together a first duct fixed to the base portion and a second duct fixed to the underframe, the rotation axis of the underframe and the rotation axis of the second duct coincide with each other, the second duct is rotatable relative to the first duct, and the first duct is, The present invention is characterized in that the duct has a first cylindrical portion, a first flange portion extending from an outer circumferential surface of the first cylindrical portion, and a plurality of first annular ribs formed annularly on the first flange portion and coaxial with the first cylindrical portion, and the second duct has a second cylindrical portion arranged coaxially with the first cylindrical portion, a second flange portion extending from an outer circumferential surface of the second cylindrical portion, and a plurality of second annular ribs formed annularly on the second flange portion and coaxial with the second cylindrical portion, the first duct and the second duct do not contact each other (except when a sealing member is interposed between the first duct and the second duct), the second annular rib is arranged between the first annular ribs, and the first annular rib is arranged between the second annular ribs .

According to the present invention, the second duct is rotatable relative to the first duct, so the frame can be rotated without twisting the duct, allowing for constant and stable ventilation without being affected by the rotation of the frame.

1 is a perspective view of a seating apparatus according to an embodiment of the present invention; FIG. 2 is an exploded view of the seating arrangement of FIG. 1; FIG. 3 is a view in which the underframe and the seat-side duct in FIG. 2 are separated. 2 is a perspective view of the seat device of FIG. 1 with the seat, the backrest, and the upper plate of the seat-side duct removed. FIG. FIG. 3 is a perspective view of the duct of FIG. 2 attached to a rotating disk. 6 is a cross-sectional view taken along line AA in FIG. 5. FIG. 6 is a perspective view of only the duct of FIG. 5 . FIG. 8 is an exploded view of the duct of FIG. FIG. 8 is an explanatory diagram showing a wiring path of a wire passing through the duct of FIG. 7 . 6A, 6B, and 6C are views of the duct and rotating disk of FIG. 5, in which (a) is a plan view, (b) is a front view, and (c) is a bottom view. 11A, 11B, and 11C are diagrams showing a state in which the second duct and the outer ring in FIG. 10 are rotated 60 degrees, where FIG. 11A is a plan view, FIG.

A "seat device" according to one embodiment of the present invention will be described with reference to Figures 1 to 11. The seat device 1 shown in Figure 1 is installed in a passenger compartment of a railway vehicle.

As shown in Figures 1 and 2, the seat device 1 comprises a pedestal (corresponding to a base) 2 that is installed on the floor inside the passenger compartment, a frame 3 that is supported on the pedestal 2 via a rotating plate 4 so that it can rotate horizontally, three seats 7 arranged side by side and supported by the frame 3, and armrests 12. In other words, the seat device 1 in this example is a three-seater type. Each seat 7 comprises a seat portion 71 and a backrest 72 that can be reclined relative to the seat portion 71.

A pedal 11 is attached to the footrest 2, and by stepping on this pedal 11, the base frame 3 can be rotated. In other words, the orientation of the seat 7 can be changed by 180 degrees. In addition, by stepping on the pedal 11, the backrest 72 in the reclined state returns to the upright state.

The rotating plate 4 has an inner ring 41 and an outer ring 42 arranged on the same axis, and balls (rolling elements) provided between the inner ring 41 and the outer ring 42. The inner ring 41 is fixed to the center of the base 2. The outer ring 42 is fixed to the center of the frame 3 and rotates together with the frame 3.

As shown in Figure 3, the frame 3 is made up of multiple metal rods assembled into a rectangular frame.

The seat device 1 is provided with an air conditioning duct that is connected to an underfloor air duct (not shown) and through which conditioned air such as hot air and cold air passes. The dashed arrows in FIG. 2 represent the flow of conditioned air passing through the air conditioning duct. As shown in FIGS. 2 and 4, this air conditioning duct is composed of a duct 5 that extends from under the frame 3 toward the seat 71, a seat-side duct 6 that is attached to the frame 3 and positioned under the seat 71, a backrest-side space 75 that is provided inside each backrest 72, and a connecting portion (not shown) that connects the seat-side duct 6 to each backrest-side space 75.

One duct 5 is provided for each single frame 3. As shown in Figures 5 to 11, the duct 5 is configured by fitting together a first duct 51, which is attached to the inner ring 41 and fixed to the footing 2, and a second duct 52, which is attached to the outer ring 42 and fixed to the frame 3, in a non-contact state. In other words, the second duct 52 is rotatable relative to the first duct 51. This allows the frame 3 to rotate without twisting the duct 5, so that stable ventilation can be performed at all times without being affected by the rotation of the frame 3. In addition, since the duct 5 is attached directly to the turntable 4, the axis is less likely to wobble.

The first duct 51 is made of synthetic resin and integrally includes a first cylindrical portion 54a, a first flange portion 55a extending from the outer circumferential surface of the first cylindrical portion 54a, a plurality of first annular ribs 56a formed in an annular shape on the first flange portion 55a and coaxial with the first cylindrical portion 54a, and a first wire arrangement portion 53a formed on the inside of the first cylindrical portion 54a. A plurality of bolt insertion holes 57a are formed in the first flange portion 55a. Bolts for attaching the first duct 51 to the inner ring 41 are passed through these bolt insertion holes 57a. The first duct 51 is attached to the inner ring 41 with the first cylindrical portion 54a disposed inside the inner ring 41. One end of the first wire routing section 53a is connected to the inner circumferential surface of the first cylindrical section 54a and communicates with the outside of the first cylindrical section 54a, and the other end opens to the second cylindrical section 54b.

The second duct 52 is made of synthetic resin and integrally includes a second cylindrical portion 54b arranged coaxially with the first cylindrical portion 54a, a second flange portion 55b extending from the outer circumferential surface of the second cylindrical portion 54b, a plurality of second annular ribs 56b formed in an annular shape on the second flange portion 55b and coaxial with the second cylindrical portion 54b, a second wire routing portion 53b formed inside the second cylindrical portion 54b and arranged directly above the first wire routing portion 53a, and a plurality of ribs 58 connecting the outer circumferential surface of the second wire routing portion 53b and the inner circumferential surface of the second cylindrical portion 54b. A plurality of bolt insertion holes 57b are formed in the second flange portion 55b. Bolts for attaching the second duct 52 to the outer ring 42 are passed through these bolt insertion holes 57b.

As shown in FIG. 6, the second flange 55b faces the first flange 55a in a close position, the second annular rib 56b is arranged between the first annular ribs 56a, and the first annular rib 56a is arranged between the second annular ribs 56b. The first flange 55a, the second flange 55b, the multiple first annular ribs 56a, and the multiple second annular ribs 56b function as a labyrinth seal that suppresses air leakage from the gap between the first cylindrical portion 54a and the second cylindrical portion 54b.

The first cylindrical portion 54a of the duct 5 is connected to the underfloor air passage via a duct (not shown), and the second cylindrical portion 54b is disposed at the inlet 62 of the seat-side duct 6. Thus, the conditioned air from the underfloor air passage is sent into the seat-side duct 6 via a duct (not shown), the first cylindrical portion 54a, and the second cylindrical portion 54b. A wire for returning the backrest 72 from the reclined state to the upright state is passed through the first wire routing portion 53a and the second wire routing portion 53b. The arrow R in FIG. 9 indicates the wiring path of the wire. This wire functions in conjunction with the operation of the pedal 11 described above. The second wire routing portion 53b passes through the seat-side duct 6 and communicates with the outside of the seat-side duct 6.

The seat-side duct 6 is constructed by assembling a lower plate 61 shown in FIG. 4 and an upper plate (not shown), and is formed in a flat box shape that is slightly smaller than the underframe 3. The conditioned air sent into the seat-side duct 6 from an inlet 62 formed in the center of the lower plate 61 is sent to each backrest side space 75 from each of three outlets provided on the long side of the seat-side duct 6 on the backrest 72 side via connecting parts (not shown). In this way, one seat-side duct 6 is provided in common for the three seats 71, and three outlets are provided, the same number as the seats 71, and each outlet is connected to each backrest side space 75 by connecting parts (not shown).

Each backrest side space 75 is provided from the lower end to the upper end of the backrest 72. The conditioned air sent to the backrest side space 75 from the inlet 73 at the lower end of the backrest 72 is blown out from the outlet 74 at the upper end of the backrest 72 to the outside, conditioning the passenger compartment.

In the above-described embodiment, the seat device 1 includes multiple seats 7, but the seat device of the present invention may include only one seat. In addition, in the above-described embodiment, the seat device 1 is installed in a railway vehicle, but the seat device of the present invention may be installed in a vehicle other than a railway vehicle, for example, an automobile.

The above-described embodiment merely shows a typical form of the present invention, and the present invention is not limited to the embodiment. In other words, the present invention can be implemented in various modifications without departing from the gist of the present invention.

1 Seat device 2 Leg base (base part)
3 Frame 4 Turntable 5 Duct 51 First duct 52 Second duct 71 Seat 72 Backrest

Claims (4)

A seat device comprising a base portion to be installed on a floor, and a frame supported on the base portion so as to be horizontally rotatable and supporting a seat portion and a backrest,
An air conditioning vent is provided that communicates with the outside of the backrest through the underside of the underframe, the underside of the seat, and the inside of the backrest.
The air conditioning ventilation passage includes a duct extending from under the underframe toward the seat portion,
The duct is configured by fitting a first duct fixed to the base portion and a second duct fixed to the frame together,
a rotation axis of the frame and a rotation axis of the second duct are aligned, and the second duct is rotatable relative to the first duct;
the first duct has a first cylindrical portion, a first flange portion extending from an outer circumferential surface of the first cylindrical portion, and a plurality of first annular ribs formed annularly on the first flange portion and coaxial with the first cylindrical portion;
the second duct has a second cylindrical portion arranged coaxially with the first cylindrical portion, a second flange portion extending from an outer circumferential surface of the second cylindrical portion, and a plurality of second annular ribs formed annularly on the second flange portion and coaxial with the second cylindrical portion,
The first duct and the second duct do not contact each other (except when a seal member is interposed between the first duct and the second duct),
The second annular rib is disposed between the first annular ribs, and the first annular rib is disposed between the second annular ribs.
A seating arrangement comprising: the first duct has a first wire routing portion formed inside the first cylindrical portion,
The first wire routing portion has one end connected to an inner circumferential surface of the first cylindrical portion and communicating with the outside of the first cylindrical portion, and the other end opening toward the second cylindrical portion,
the second duct has a second wire routing portion formed inside the second cylindrical portion,
The backrest is reclining relative to the seat,
2. The seat device according to claim 1 , wherein a wire for returning the backrest from a reclined state to an upright state is passed through the first wire routing portion and the second wire routing portion. a rotating disk having an inner ring fixed to the base portion, an outer ring fixed to the frame, and a rolling element;
the first duct is attached to the inner ring and fixed to the base portion,
The seat device according to claim 1 or 2 , wherein the second duct is attached to the outer ring and thereby fixed to the underframe. The seat and the backrest are provided in a plurality of sets, and the seat and the backrest are arranged side by side and supported by the single frame.
The seat device according to any one of claims 1 to 3 , characterized in that one duct is provided for the single frame.

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