JPH0640334A - Rotating device for vehicle seat - Google Patents

Abstract

PURPOSE:To turn a rotatable vehicle seat smoothly and with ensured shifting by making the rotatable vehicle seat in a stable structure without any play. CONSTITUTION:A fixed underframe 2 is provided on the floor of a vehicle and a movable carriage 3 is held on the fixed underframe 2 so that it can make reciprocating movement in the direction orthogonal to the wall of the vehicle. A rotary frame 6 is supported on the movable carriage through a rotary disc 5 and a powed guide bar 9 provided with a rack 10 is fixed to the rotary frame 6. A pinion 15 and an oscillating holder 16, geared to the rack 10, are supported to a spindle pivoted to the fixed underframe 2. A guide roller 19 coming in contact with the outer surface of the guide bar 9 is provided on the oscillating holder 16 and the guide bar 9 is sandwiched between the pinion 15 and the guide roller 19. When the seat is turned manually, the movable carriage 3 leaves the wall at the beginning of the turn and comes close to the wall at the finish of the turn following the shape of the guide bar 9 and a rotary underframe 6 turns on the movable carriage 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating device for changing the direction of a vehicle seat installed on a railway vehicle, a bus, a passenger ship or the like.

[0002]

2. Description of the Related Art Generally, a vehicle seat is installed at a position close to a wall in order to effectively use a floor area. Therefore, when rotating the seat, it is necessary to shift the rotation axis of the seat away from the wall so that the seat does not collide with the wall. Focusing on this point, Japanese Patent Publication No. 56-53366 discloses a vehicle seat that is manually rotated, by providing an axial center guide mechanism composed of a pin and a cam groove so that the axial center starts to rotate away from the wall. A rotation device has been proposed that is configured to approach a wall at the end of turning.

[0003]

However, in this conventional shaft center guide mechanism, not only when the pin does not have a roller, but also when the pin has a roller as in the embodiment described in the above publication. Since a gap is required between the pin and the cam groove to slide the roller or rotate the roller, there is inevitably rattling between the pin and the cam groove, and there is a problem with its durability during long-term use. It was

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a rotatable vehicle seat having a rattling-free structure so that the seat can be smoothly and surely shifted and rotated.

[0005]

In order to solve the above-mentioned problems, a rotating device for a vehicle seat according to claim 1 of the present invention comprises a fixed underframe installed on the floor of a vehicle and the fixed table. A movable base supported on the frame so as to be capable of reciprocating in a direction orthogonal to the wall of the vehicle, a rotary frame that rotatably supports a seat with respect to the movable frame, and an arc shape horizontally provided on the rotary frame. A guide member, and a meshing means provided on the guide member,
The structure includes a meshing rotating body that is axially attached to the fixed underframe and meshes with the meshing means.

According to a second aspect of the present invention, there is provided a rotating device for a vehicle seat, comprising a guide roller which is axially attached to the fixed underframe and which abuts against the guide member so that the meshing means and the meshing rotating body are not separated from each other. It was a prepared structure.

Further, in the rotating device for a vehicle seat according to a third aspect, the guide member is a bow-shaped guide bar that is long in the moving direction of the movable table, and the meshing means is provided on one side surface of the guide bar. The meshing rotating body that meshes with the meshing means and the guide roller that abuts against the other side surface of the guide bar are held by a swinging holder that swings around a vertical axis with respect to the fixed underframe. It was configured.

According to a fourth aspect of the present invention, in the vehicle seat rotating device, the guide member is a guide bar having a cross section having a long arcuate shape in the moving direction of the movable table and having a pair of facing surfaces. The pair of facing surfaces of the guide bar are provided with the meshing means, and the meshing rotating body meshing with the meshing means and the guide roller abutting against the other facing surface of the guide bar are provided with the same axial center position. It was made into the composition.

Here, examples of the "vehicle seats" include seats for railway vehicles and seats for sightseeing buses. As the "guide member", for example, one having substantially the same shape as the cam groove disclosed in the above-mentioned publication, that is, an arc-shaped member in which both ends are sharply curved and the center is gently curved, An arcuate shape in which the whole is gently curved can also be used.

As the "meshing means", for example, a rack, a ball chain, a link chain, a large number of recesses or holes (a kind of rack) formed in the guide member at intervals.
Etc. can be used, and according to this, a pinion, a sprocket wheel, etc. can be used as a "meshing rotary body."

[0011]

In the rotating device for a vehicle seat according to the first aspect of the present invention, when the seat is manually rotated, the movable base is moved, and at the same time, the rotary frame is rotated on the movable base. Since the guide member is formed in an arc shape, according to its shape,
The platform moves away from the wall of the vehicle at the beginning of the turn and approaches the wall at the end of the turn. At this time, since the meshing rotary body meshes with the meshing means to rotate, the clearance required between them is smaller than the clearance between the pin and the cam groove of the conventional example, and rattling occurs between them. It rarely happens. Therefore, due to the structure having excellent durability, the seat can be smoothly shifted and rotated with a light force.

Further, according to the rotation device for a vehicle seat of the second aspect, the guide roller rotates in contact with the guide member so that the meshing means and the meshing rotating body are not separated from each other.
Rattling between the meshing means and the meshing rotating body can be more reliably suppressed.

For example, in the rotating device for a vehicle seat according to the third aspect, since the guide bar is sandwiched by the meshing rotating body and the guide roller, rattling does not occur between the meshing rotating body and the meshing means. Further, in the curved portion of the guide bar, the swing holder swings following the shape,
Twisting of the meshing rotary member, the guide roller and the guide bar is prevented. Therefore, due to its robust and durable structure,
The seat can be smoothly and reliably shifted and rotated.

Further, in the rotating device for a vehicle seat according to a fourth aspect of the present invention, the point at which the meshing rotary member and the guide roller regulate the guide bar from the inside thereof, and accordingly, the axial center positions of the meshing rotary member and the guide roller are set. The same operation as described above can be performed, except that the swinging holder can be made the same and the structure is simple because it does not require twisting of the meshing rotating body and the guide roller and the guide bar. Play. Also,
As a result of the meshing rotating body and the guide roller being hidden inside the guide bar, the engaging portion and the abutting portion between the meshing rotating body and the guide roller and the guide bar are hit by the shoe tip of the seated person and scratched, or It is possible to prevent problems such as wrapping around the hem, digging into other bags such as confectionery, and adhesion of grease or the like applied to the engaging portion and the abutting portion to shoes, socks, or pants.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which the present invention is embodied in a rotating device for a railroad vehicle seat will be described below with reference to FIGS.
In FIG. 1, F is the floor of the railway vehicle, W is the wall, 1 is the entire seat for the railway vehicle, and the seat 1 for the railway vehicle is installed close to the wall W so that the area of the floor F can be effectively used. ing. As shown in FIGS. 1 to 3, a fixed frame 2 is installed on the floor F, and a movable table 3 is supported on the upper surface of the fixed frame 2 so as to be capable of reciprocating in a direction orthogonal to the wall W. There is. A rotary frame 6 is rotatably supported on the movable table 3 via a fixed disk 4 and a rotary disk 5.

In this embodiment, a pair of seats 8 each having a reclining backrest 7 are attached to the rotary frame 6, and a guide bar 9 is horizontally fixed so as to extend in the moving direction of the movable table 3. Has been done. The guide bar 9 is formed of a solid steel material into an arc shape in which both ends are sharply curved and the central part is gently curved, and a rack 10 as an engaging means is fixed to the entire inner surface thereof. A pinion 15 as a meshing rotating body that meshes with the rack 10 of the guide bar 9 is provided on one side of the fixed underframe 2. In addition, fixed underframe 2
A lock release mechanism (not shown) that releases the lock of the rotary underframe 6 and the reclining backrest 7 prior to the rotation of the seat 8 is installed inside. A timing belt with teeth can be used as the rack 10.

As shown in FIG. 4, a vertical shaft 14 is rotatably mounted on the fixed underframe 2 by a known shaft mounting means (not shown) such as a bearing. A pinion 15 as the meshing rotating body is attached to the shaft 14, and
An arm-shaped swing holder 16 is rotatably supported by a boss portion 17 at the base end. In addition, the shaft 14 with respect to the fixed underframe 2
The pinion 15 can be rotatably attached to the shaft 14 by making the pin non-rotatable. A support shaft 18 is erected on the upper surface of the tip of the swing holder 16, and the guide roller 1 is provided on the upper end thereof.
9 is rotatably supported. The guide roller 19 is supported by the swing holder 16 so as to be swingable around the vertical axis with respect to the fixed underframe 2 at a position separated from the pinion 15 by a predetermined distance, and in this state, the guide roller 19 contacts the outer surface of the guide bar 9. It comes in contact with them and rolls.

In the rotating device having the above structure, when the seat 8 is rotated manually, the pinion 15 and the rack 10 are rotated.
The guide bar 9 moves through the meshing with the moving base 3, and as shown in FIG. 3, the moving base 3 is moved in the direction orthogonal to the wall W of the vehicle, and at the same time, the rotating frame 6 is moved on the moving base 3. Is rotated. Since the guide bar 9 is formed in an arc shape in which both ends are sharply curved and the central part is gently curved, the moving table 3 is moved in a direction away from the wall W in the small angle range in which the guide bar 9 is rotated. , Is returned and moved in a direction approaching the wall W within a small angle range at the end of turning.

At this time, the pinion 15 and the rack 10 mesh with each other, and the guide bar 9 is sandwiched by the pinion 15 and the guide roller 19, so that the pinion 1
No rattling occurs between the guide roller 19 and the guide roller 19, and the seat 8 can be easily rotated with a light force. Further, in the curved portion of the guide bar 9, the swing holder 16 is swung following the shape thereof, so that the pinion 15, the guide roller 19 and the guide bar 9 are prevented from being twisted, and in this portion as well, the guide bar 9 is prevented. Is driven smoothly. Therefore, the seat 8 can be smoothly and surely shifted and rotated by the robust and durable structure without rattling.

Next, another embodiment of the present invention will be described with reference to FIGS.
Follow the instructions below. In these embodiments, the members corresponding to those in the first embodiment are designated by the same reference numerals as those in the first embodiment to avoid redundant description.

FIG. 5 shows a second embodiment, in which the pinion 15 is connected to the shaft 14 via a plurality of intermediate gears 21. The swing holder 16 is rotatably supported by a shaft 22 provided upright on the fixed underframe 2 via a bearing 23 at an intermediate portion thereof. Then, the swing holder 1
A pinion 15 is supported on one end of the rotary shaft 6 via a rotary shaft 24, and a guide roller 19 is provided on the other end by a support shaft 18. According to this embodiment, since the swinging holder 16 supports the pinion 15 and the guide roller 19 on the fixed underframe 2 in a double-supported state, the structure can be made even more robust, and therefore, can be ensured for a long period of time and reliably. You can expect smooth operation.

FIG. 6 shows a third embodiment. Here, a support cylinder 37 is erected and fixed on a fixed underframe 2 formed by combining channel materials, and a shaft 14 is inserted through the inside thereof. A swing holder 16 is rotatably supported at the upper end. Further, in this embodiment, a timing belt 34 as an engaging means is fixed to the outer surface of the guide bar 9.

FIG. 7 shows a fourth embodiment relating to the change of the guide roller 19, and the rubber O-ring 3 is provided on the outer peripheral surface thereof.
9 is fitted. According to this embodiment, the noise associated with the rolling of the guide roller 19 can be suppressed and the seat 8 can be rotated more quietly.

FIG. 8 shows a fifth embodiment relating to the modification of the guide bar 9. Here, the rack 10 is fixed to the outer side surface of the guide bar 9, and the pinion 15 correspondingly corresponds to the pinion 15. , And guide rollers 19 are arranged inside the guide bar 9. According to this embodiment, since the curvature of the rack 10 at the curved portion of the guide bar 9 is relatively large, the pinion 15 can be meshed with the rack 10 more smoothly.

FIG. 9 shows a sixth embodiment relating to the change of the meshing means and the meshing rotating body. The ball chain 26 serves as the meshing means and the sprocket wheel 2 serves as the meshing rotating body.
7 is used. Each ball 2 of the ball chain 26
Reference numeral 8 is a recess 2 formed on the inner or outer surface of the guide bar 9.
9 is fitted, and in that state, the sprocket wheel 27
Meshes with. Therefore, according to this embodiment as well, the same effect as that of the above embodiment can be obtained, and a unique effect that the engagement can be smoothed by utilizing the slight play of each ball 28 can be expected. It is also possible to use a link chain as the meshing means for meshing.

FIG. 10 shows a seventh embodiment. The guide bar 9 has an arcuate shape as in the first embodiment, but has a U-shaped cross section with a downward opening, and a pair of facing surfaces are provided inside the guide bar 9. have. A rack 10 as an engaging means is fixed to one of the facing surfaces. Further, the shaft 14 axially attached to the fixed underframe 2 is inserted into the support cylinder 37 fixed to the fixed underframe 2. A pinion 15 that meshes with the rack 10 is mounted in the middle of the shaft 14, and a guide roller 19 that rolls in contact with the other facing surface of the guide bar 9 at the upper end of the shaft 14 is rotatable by a bearing 42. Supported by.

According to this embodiment, the pinion 15 and the guide roller 19 regulate the guide bar 9 from the inside thereof, so that the axial center positions of these can be made equal to each other, and swinging is possible as compared with the first embodiment and the like. It is possible to prevent the twisting of the pinion 15 and the guide roller 19 in the curved portion of the guide bar 9 with a simple structure because the holder is unnecessary. Further, as a result of the pinion 15 and the guide roller 19 being hidden inside the guide bar 9, the pinion 15 and the guide roller 19 are
The shoe tip of the seated person may be scratched at the meshing portion and the contact portion between the guide bar 9 and the guide bar 9, the hem of the pants may be rolled up, or other bags such as confectionery may be bitten. It is possible to prevent a problem that grease or the like applied to the contact portion adheres to shoes, socks, or pants.

FIG. 11 shows a modified example of the seventh embodiment. One facing surface of the guide bar 9 is extended by a plate member 9a, and a large number of holes 10a as a modified example of the rack 10 are provided in this plate member 9a. Are provided at intervals along the longitudinal direction of the guide bar 9, and the pinion 15 is engaged with the hole 10a. Similarly, FIG. 12 shows a modified example of the first embodiment, in which a large number of holes 10a as modified examples of the rack 10 are formed in the lower part of the guide bar 9, and the pinion 1 is inserted in the holes 10a.
It is a mesh of 5.

In addition, the present invention may be applied to various types of vehicle seats such as a sightseeing bus and a passenger ship, and the configuration of each part may be appropriately modified and embodied without departing from the spirit of the present invention.

[0030]

As described in detail above, according to the rotating device for a vehicle seat according to claim 1 of the present invention, rattling hardly occurs between the meshing rotating body and the meshing means, and the durability is improved. Due to its excellent structure, the seat can be smoothly shifted and rotated with a light force.

Further, according to the rotating device for a vehicle seat of the second aspect, it is possible to more reliably suppress the rattling between the meshing means and the meshing rotating body.

Further, according to the rotation device for a vehicle seat of the third aspect, the twisting of the meshing rotating body and the guide roller and the guide bar is prevented even in the curved portion of the guide bar, which is robust and excellent in durability. The structure allows the seat to be smoothly and reliably shifted and rotated.

According to the vehicle seat rotating device of the fourth aspect, in addition to the above effects, the structure is further simplified, and the meshing rotating member and the meshing portion and abutting portion between the guide roller and the guide bar are provided. , The shoe tip of the seated person may be hit and scratched,
It is possible to prevent problems that the hem of the trousers is rolled up, other bags such as confectionery are caught, and grease or the like applied to the meshing portion and the contact portion is attached to shoes, socks, or pants.

[Brief description of drawings]

FIG. 1 is a front view of a railway vehicle seat showing an embodiment of the present invention.

FIG. 2 is a plan view showing a rotating device for the railway vehicle seat of FIG.

FIG. 3 is a plan view showing an operating state of the rotating device of FIG.

FIG. 4 is an enlarged sectional view taken along the line AA of FIG.

FIG. 5 is a sectional view showing a second embodiment relating to the change of the drive mechanism.

FIG. 6 is a sectional view showing a third embodiment according to another modification of the drive mechanism.

FIG. 7 is a sectional view showing a fourth embodiment relating to the change of the guide roller.

FIG. 8 is a plan view showing a fifth embodiment of changing the guide bar.

FIG. 9 is a sectional view showing a sixth embodiment relating to the change of the meshing means and the meshing rotating body.

FIG. 10 is a sectional view showing a seventh embodiment relating to a change in guide bar and drive mechanism.

FIG. 11 is a sectional view showing a modified example of the seventh embodiment.

FIG. 12 is a sectional view showing a modification of the first embodiment.

[Explanation of symbols]

1 Railway vehicle seat 2 Fixed underframe 3 Moving platform 6 Rotating underframe 8 Seat 9 Guide bar 10 Rack 14 Axis 15 Pinion 16 Swing holder 19 Guide roller 26 Ball chain 27 Sprocket wheel 34 Timing belt F Floor W wall

Claims (4)

[Claims] 1. A fixed underframe installed on a floor of a vehicle, a movable table supported by the fixed underframe so as to be capable of reciprocating in a direction orthogonal to a wall of the vehicle, and a seat rotated with respect to the movable table. A rotatably supporting frame, an arcuate guide member horizontally provided on the rotative frame, a meshing means provided on the guide member, and a shaft attached to the fixed frame, and the meshing means A rotating device for a vehicle seat, comprising a meshing rotating body that meshes with each other. 2. The rotating device for a vehicle seat according to claim 1, further comprising a guide roller which is axially attached to the fixed underframe and which abuts on the guide member so that the engaging means and the engaging rotating body are not separated from each other. . 3. The guide member is a bow-shaped guide bar that is long in the moving direction of the movable table, the meshing means is provided on one side surface of the guide bar, and the meshing rotating body meshes with the meshing means. The rotation device for a vehicle seat according to claim 2, wherein the guide roller abutting on the other side surface of the guide bar is held by a swing holder that swings around a vertical axis with respect to the fixed underframe. 4. The guide member is a guide bar having a cross section having a long arcuate shape in the moving direction of the movable table and having a pair of facing surfaces, and the meshing means is provided on the pair of facing surfaces of the guide bar. The rotation device for a vehicle seat according to claim 2, wherein the meshing rotating body that is provided and meshes with the meshing means, and the guide roller that abuts on the other facing surface of the guide bar are provided with the same axial center position. .