JPH04243636A - Rotary seat - Google Patents

Abstract

PURPOSE:To provide a rotary seat formed of a leg part provided on the floor and a seat part provided rotatably to the leg part without requiring large-scale modification work. CONSTITUTION:A rotary seat is formed in such a way as to be provided with a shaft 8 erected at the bottom face of a seat part 3 so as to protrude into a leg part 2 and provided with a first sprocket fitted to the tip part thereof, a bearing 7 provided at the top face of the leg part 2 so as to support the intermediate part of the shaft 8 rotatably, a compressor 11 provided at the leg part 2, a rotary actuator 12 provided at the leg part 2, driven by the compressor 11 and provided with a second sprocket fitted to its output shaft, and a chain 14 wound onto the first and second sprockets.

Description

[Detailed description of the invention]

[Field of Industrial Application] The present invention relates to a rotary seat consisting of a leg section provided on a floor and a seat section rotatably provided with respect to the leg section. Regarding rotating seats.

[Prior Art] In recent years, in railway cars, when seats are installed perpendicular to the direction of travel of the train (so-called cross seats), seats are installed at the starting station so that passengers can sit facing the direction of travel. There is a system that rotates the seats in the cabin all at once before loading passengers. The power for such a rotating seat is high pressure air. The source of this high-pressure air is a large central compressor installed under the floor for supplying high-pressure air to the brake mechanism, door opening/closing mechanism, etc. of the vehicle. Therefore, air piping from the underfloor compressor to each seat is required.

[Problem to be solved by the invention] However, when modifying an existing vehicle equipped with a seat that cannot be rotated into a seat that can be rotated all at once, there is a problem in that large-scale modification work such as air piping from under the floor is required. be. The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a rotary seat that does not require large-scale modification work.

[Means for Solving the Problems] The present invention solves the above-mentioned problems, and provides a rotary seat comprising a leg section provided on a floor and a seat section rotatably provided with respect to the leg section. a shaft that is installed upright on the bottom surface of the section, protrudes into the leg section, and has a first sprocket attached to its tip; and a bearing that is provided on the top surface of the leg section and rotatably supports the intermediate section of the shaft. a compressor provided on the leg; a rotary actuator provided on the leg, driven by the compressor, and having a second sprocket attached to its output shaft;
and a chain wound around the second sprocket.

[Operation] In the rotary seat of the present invention, when the compressor is driven, the rotary actuator is driven and the second rotary actuator is driven.
sprocket rotates. This rotation of the second sprocket is transmitted to the first sprocket via the chain, causing the shaft to rotate. Due to the rotation of this shaft,
A seat part rotatably provided with respect to the leg part rotates.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view illustrating an embodiment of the present invention, FIG. 2 is a plan view with the seat cushion in FIG. 1 removed, and FIG. 3 is a diagram illustrating the operation. First, Figures 1 and 2
, a leg portion 2 is installed on a floor 1. A seat part 3 on which three passengers can sit is arranged on the leg part 2. The seat portion 3 includes three seat cushions 4 and a seat back 5 attached to each of these seat cushions 4 so as to be reclinable in the front and back direction.
and armrests 6 provided on both sides of each seat cushion 4. The reclining mechanism includes a biasing section (a spring or a gas spring is widely used) that biases the seatback 5 toward the normal position, and a locking mechanism that locks the seatback 5 at a predetermined reclining angle position. It is composed of. A bearing 7 is disposed approximately at the center of the top surface of the frame 10 of the leg portion 2 . On the other hand, a shaft 8 is erected on the bottom surface of the seat portion 3, protruding into the leg portion 2, and rotatably supported by a bearing 7 at an intermediate portion. A first sprocket 9 is attached to the tip of the shaft 8. Furthermore, a compressor 11 and a rotary actuator 12 driven by the compressor 10 are attached to the frame 10 of the leg section 2 . The structure of the rotary actuator 12 is such that a rack is connected to a piston that reciprocates within a cylinder, and this rack meshes with a pinion provided on an output shaft. The output shaft rotates when the piston moves linearly within the cylinder using high-pressure air. A second sprocket 13 is attached to the tip of the output shaft of the rotary actuator 12. A chain 14 is wound around the first sprocket 9 and the second sprocket 13. The rotary actuator 12 and the compressor 11 are connected by air piping, but a first electromagnetic valve (two-way switching valve) 15 is provided in the middle, and the rotation direction of the output shaft of the rotary actuator 12 can be arbitrarily switched. It is now possible. The frame 10 on the passage side of the leg section 2 is provided with a locking mechanism that prevents the seat section 3 from rotating. This locking mechanism is provided with a pin 16 that is movably provided on the top surface of the frame 10 of the leg portion 2 in the vertical direction and on both sides of the bottom surface of the frame 17 of the seat portion 3, and the pin 16 can be fitted. It has holes 18 and 19 drilled in it. Further, the frame 10 of the leg portion 2 is provided with a lever 20. One rotating end of the lever 20 is attached to the lower end of the pin 16, and the intermediate portion is rotatably attached to the frame 10. Furthermore, this lever 20 is urged to rotate in a direction in which the pin 16 engages with the hole 18 or 19 by a biasing means (not shown). The other rotating end of the lever 20 is formed with a pedal portion 20a, and a locking mechanism that prohibits rotation of the seat portion 3 by stepping on the pedal portion 20a downward against the urging force of the urging means. is now in an unlocked state. Further, the frame 10 of the leg portion 2 is provided with an air cylinder 21. The spindle of this air cylinder 21 is attached to the pedal portion 20a of the lever 20. The air cylinder 21 and the compressor 11 are connected by air piping, and a second electromagnetic valve (two-way switching valve) 22 is provided in the middle to arbitrarily switch the moving direction of the spindle of the air cylinder 21. It is now changeable. The cylinder of the rotary actuator 12 is provided with magnetic sensors 23 and 24 that respond when the piston is at top dead center or bottom dead center and detect the position of the piston. 25 is magnetic sensor 2
This is a control unit that takes in signals No. 3 and 24 and drives the first electromagnetic valve 15 and the second electromagnetic valve 22. Next, the operation of the above configuration will be explained. ■To rotate all seats at once Turn on the switch installed in the driver's cab, etc., and the control unit 2
5, based on the signals from the magnetic sensors 23 and 24, it is determined whether the sheet is oriented in the traveling direction or not. When it is necessary to rotate the direction of the seat, the first and second electromagnetic valves 15
, 22 are activated. First, when the second electromagnetic valve 22 is activated, the pedal portion 20a of the lever 20 is pushed down, and the locking mechanism that prohibits the rotation of the seat portion 3 becomes unlocked. Next, when the first electromagnetic valve 15 operates, the rotary actuator 12 is driven and the second sprocket 13 is rotated. This rotation of the second sprocket 13 is transmitted to the first sprocket 9 via the chain 14, and the seat portion 3 rotates 180 degrees. When the 180° rotation of the seat portion 3 is completed, the control unit 25 again operates the second electromagnetic valve 22 to raise the pin 16 and lock the seat portion 3. If the installation pitch between the sheets is narrow and they would interfere with each other if they were all rotated at the same time, the sheets in the even and odd rows should be rotated separately, as shown in FIG. For example, sheets in odd-numbered rows may be rotated first (solid arrows), and then sheets in even-numbered rows may be rotated (dashed arrows). ■When rotating the seat manually When the passenger manually rotates the seat, the passenger steps on the pedal portion 20a of the lever 20. Then, the lock mechanism that prohibits rotation of the seat section 3 becomes unlocked, and the passenger can manually rotate the seat section 3. By providing a seat rotation mechanism and its power source in each seat as in the above configuration, even when converting an existing vehicle with a non-rotatable seat to a rotary seat, air piping from under the floor etc. This eliminates the need for large-scale modification work, contributing to shorter construction times and higher vehicle operating rates.

As described above, according to the present invention, by providing the seat rotation mechanism and its power source within the seat legs, it is possible to realize a rotating seat that does not require large-scale modification work.

[Brief explanation of the drawing]

FIG. 1 is a front view illustrating an embodiment of the present invention.

FIG. 2 is a plan view of FIG. 1 with the seat cushion removed.

FIG. 3 is a diagram illustrating the operation in FIG. 1.

[Explanation of symbols]

1 floor 2 Legs 3 Seat part 7 Bearing 8 Shaft 9 First sprocket 11 Compressor 12 Rotary actuator 13 Second sprocket 14 Chain

Claims (1)

[Claims] [Claim 1] Legs (2) provided on a floor (1).
) and a seat part (3) that is rotatably provided with respect to the leg part (2), the seat part (3) is provided upright on the bottom surface of the seat part (3), and the inner part of the leg part (2) is a shaft (8) that protrudes from the top and has a first sprocket (9) attached to its tip; and a shaft (8) that is provided on the top surface of the leg (2);
A bearing (7) that rotatably supports the intermediate portion of the shaft (8), and a compressor (
11), a rotary actuator (12) provided on the leg (2), driven by the compressor (11), and having a second sprocket (13) attached to the output shaft; 2 sprocket (9,1
3) a chain (14) wound around the rotary seat.