JP2004299552A - Rotary seat for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and inexpensively constitute a rotating and driving mechanism of a seat frame by surely holding engagement of a rack member and a pinion member and saving an exclusive member for detent of the seat frame. <P>SOLUTION: The seat frame 3 is rotatably supported on a base 2 and a sprocket 18 as the pinion member located at a rotation center of the seat frame 3 is fixed to the base 2. The rack member 19 constituted by storing a chain in a chain box 27 is engaged with the sprocket 18. The rack member 19 is guided and supported by a rail member 21 so that the rack member 19 may displace in a tangential line direction of the sprocket 18 and be prevented from bending and displacing in a radial direction of the sprocket 18. The rack member 19 is reciprocatively driven by an electric actuator 20. A bracket 33 for reinforcement is provided on a back face of the rail member 21. An adjust bolt 39 is screwed into an adjustment base 37. The rail member 21 is adjusted in location in the radial direction of the sprocket 18. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a rotating seat for a vehicle, which is installed in a vehicle such as a bus, a railway vehicle, an aircraft, and the like.
[0002]
[Prior art]
Patent Literature 1 describes a vehicle rotating seat including a base installed on a floor of a vehicle, a seat frame rotatably supported on the base, and a rotation driving mechanism of the seat frame. I have. Two hydraulic cylinders are provided inside the seat frame, and one hydraulic cylinder is connected to the base end of the rack member to reciprocate the rack member and rotate the seat frame through meshing between the rack member and the pinion member. I do. In the other hydraulic cylinder, a detent pin is inserted into a hole on the base side via a link, and the seat frame is locked at a stop position.
[0003]
[Patent Document 1]
Published Japanese Utility Model Application No. Hei 6-49160
[Problems to be solved by the invention]
However, according to the conventional rotating seat for vehicles, since the rack member only supports the base end of the hydraulic cylinder, the engagement between the rack member and the pinion member is uncertain. For example, when a rotational force is applied due to hitting of a person or an object or transmission of acceleration or vibration due to traveling, the rack member is bent and disengaged, and the seat may rotate unexpectedly. For this reason, it is necessary to provide a dedicated member such as a pin, a hydraulic cylinder, and a link for stopping the rotation of the seat frame when the rotary drive mechanism is stopped, which increases the number of components of the rotary drive mechanism, complicates the configuration, and reduces costs. There was a problem that it was expensive.
[0005]
SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems, to reliably hold the engagement between the rack member and the pinion member, to omit a dedicated member for preventing the seat frame from rotating when stopped, and to simplify and reduce the cost of the rotation drive mechanism. It is an object of the present invention to provide a rotating seat for a vehicle which can be configured as follows.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a vehicle rotating seat according to the present invention includes a base installed on a floor of a vehicle, a seat frame rotatably supported on the base, and a rotation driving mechanism for the seat frame. In the vehicle rotary seat provided with the pinion member, the rotation drive mechanism includes a pinion member positioned at the center of rotation of the seat frame, a rack member that meshes with the pinion member, and a pinion member connected to the base end of the rack member. An actuator that reciprocates in the tangential direction of the rack member, and a rail member that guides and supports at least the vicinity of the tip end of the rack member so that the rack member can be displaced in the tangential direction of the pinion member and does not bend in the radial direction of the pinion member. Wherein a pinion member is provided on one side of the base or the seat frame, and a rack member, an actuator, and a rail member are provided on the other side of the base or the seat frame. .
[0007]
Here, the pinion member is a member in which the teeth (or their equivalents) are arranged on the circumference, and the rack member is a member in which the teeth (or their equivalents) are arranged in a straight line. The teeth (or their equivalents) mesh to convert the linear motion of the rack member into a rotational motion of the pinion member. Specific examples of the pinion member and the rack member are not particularly limited, and examples thereof include a normal combination of a pinion gear and a rack gear and a combination of a sprocket and a chain.
[0008]
The actuator is not particularly limited, and examples thereof include a fluid pressure actuator or an electric actuator in which an output shaft reciprocates linearly. The hydraulic actuator may be a hydraulic cylinder or an air cylinder. The electric actuator is preferable because it is less bulky and easier to wire than the fluid pressure actuator. For example, an electric actuator having a structure in which an output shaft travels straight through a reduction gear by an electric motor can be preferably used.
[0009]
The rail member is not particularly limited, but may be one having a structure for slidingly guiding the rack member or a structure for rollingly guiding the rack member. The rail member has a function of guiding the rack member in a straight line and supporting the rack member so as not to bend and displace, thereby maintaining a meshing state between the rack member and the pinion member. The rail member may be, for example, a short one that guides and supports only the vicinity of the front end of the rack member (since the base end of the rack member is connected to the actuator and is supported to some extent, on the opposite side), A plurality of guide members may be provided to guide and support the vicinity of the front end of the rack member and an intermediate portion in the length direction, or may be provided to guide and support substantially the entire length of the rack member.
[0010]
Further, in order to prevent bending deformation of the rack member and allow the rack member to move straight, it is preferable to provide a means for preventing the rail member from bending or a means for increasing the rigidity of the rack member. Specifically, as the former means, a configuration in which the surface of the rail member on the side opposite to the surface on which the rack member is guided is supported on the back by a reinforcing bracket can be exemplified. As the latter means, a configuration in which the rack member is stored in a box and the box is slidably assembled to the rail member via a slider can be adopted.
[0011]
The rail member may be fixed to the base or the seat frame, but by fixing the rail member to the base or the seat frame via a member for adjusting the position of the pinion member in the radial direction, the rack member and the pinion member can be fixed. It is preferable to be able to finely adjust the meshing of.
[0012]
As a support structure of the seat frame, for example, a bearing is provided at the center of rotation of the seat frame, a spacer is interposed between the base and the seat frame around the bearing, and the seat frame is rotated in a horizontal plane by the spacer. It is good to support as much as possible. As the spacer, a sliding guide member such as a hard resin plate or a rolling guide member such as a ball bearing can be used.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a rotating seat for a bus or a railway vehicle. The base 2 of the rotating seat 1 is installed on the floor F of the vehicle body, and the seat frame 3 is rotatably supported on the base 2. A pair of seats 4 are mounted on the seat frame 3, and each seat 4 is provided with a seat 5, a backrest 6, an armrest 7, and the like.
[0014]
As shown in FIGS. 2 and 3, the base 2 is formed, for example, in a cylindrical shape, and a support cylinder 9 is provided upright at the center of the upper lid 2a. The seat frame 3 is formed in a long rectangular frame shape, a board 10 is horizontally installed between a front frame 3a and a rear frame 3b, and a seat mounting portion 11 is provided on left and right side frames 3c and 3d. The front frame 3a is higher than the rear frame 3b, and the seat 4 is mounted on the seat mounting portion 11 in a posture slightly inclined rearward.
[0015]
A hole 12 into which the support cylinder 9 is fitted and a rotary cylinder 13 are provided at the center of the substrate 10, and a needle bearing 14 is interposed between the rotary cylinder 13 and the support cylinder 9. Around the needle bearing 14, eight sliding plates 15 made of hard resin are attached to the upper surface of the upper lid 2a at an equal angle. The slide plate 15 functions as a spacer member interposed between the base 2 and the seat frame 3, and the seat frame 3 is supported by the slide plate 15 and the needle bearing 14 so as to be rotatable with respect to the base 2 in a horizontal plane. ing.
[0016]
A mechanism 17 for rotating the seat frame 3 is installed on the base 2 and the seat frame 3. The rotation drive mechanism 17 includes a sprocket 18 as a pinion member positioned at the center of rotation of the seat frame 3, a rack member 19 using a chain 26 meshing with the sprocket 18, and a rack member connected to the base end of the rack member 19. An electric actuator 20 as an actuator for reciprocally driving the sprocket 18 in a tangential direction of the sprocket 18; and a rack member 19 so that the rack member 19 can be displaced in the tangential direction of the sprocket 18 and does not bend in the radial direction of the sprocket 18. And a rail member 21 for guiding and supporting at least the vicinity of the front end (in this example, substantially the entire length including the vicinity of the front end of the rack member 19). In this example, a sprocket 18 is provided as a pinion member on the base 2 side, and a rack member 19, an electric actuator 20, and a rail member 21 are provided on the seat frame 3 side.
[0017]
The sprocket 18 is fixed to the inner plate 23 of the support cylinder 9 by bolts 22 while covering the upper surface of the support cylinder 9 of the base 2. The electric actuator 20 is attached to the attachment portion 24 of the right frame 3c, and has an output shaft 25 on the opposite side to the attachment portion 24. Inside the electric actuator 20, an electric motor for driving the output shaft 25 to reciprocate linearly, a speed reducer, and a motion conversion mechanism are provided (not shown).
[0018]
As shown in FIGS. 4 and 5, the rack member 19 is configured such that the chain 26 is housed inside the chain box 27, and tensioners 28 are provided at both ends of the chain box 27 to stretch the chain 26 so that the tension can be adjusted. Have been. A resin or rubber back support 27a is provided between the chain 26 and the inner wall of the chain box 27 to support the chain 26 with some elasticity. In addition to preventing slack, the generation of noise due to the engagement between the sprocket 18 and the chain 26 is reduced. A connecting piece 29 connected to the output shaft 25 is provided upright on the upper surface of one end of the chain box 27, and a slider 30 is fixed to the back of the chain box 27 with bolts 31. A sliding guide 32 made of hard resin is mounted on the slider 30.
[0019]
The rail member 21 is formed in a C-shaped cross section, and includes a pair of reinforcing brackets 33 on a surface opposite to a surface on which the rack member 19 is guided. A slide guide 32 is inserted inside the rail member 21, and the rack member 19 is slidably assembled to the rail member 21 via the slide guide 32 and the slider 30. The bracket 33 is fixed to the substrate 10 with a bolt 35 passing through a long hole 34 so as to be adjustable in position, and both ends of the rail member 21 are attached to the bracket 33 with bolts 36.
[0020]
A pair of adjustment stands 37 is fixed to the substrate 10 at a position adjacent to the inside of the bracket 33. A nut 38 is fixed to an upper portion of the adjustment table 37, and an adjustment bolt 39 is screwed to the nut 38. The adjustment bolt 39 is a member that adjusts the position of the rail member 21 in the radial direction of the sprocket 18, and the amount of engagement between the chain 26 and the sprocket 18 can be adjusted to an appropriate value by operating the adjustment bolt 39. When adjusting the position of the rail member 21, the bolt 35 of the bracket 33 is loosened beforehand so that the rail member 21 can be moved within the length range of the long hole 34.
[0021]
As shown in FIGS. 2 and 3, limit switches 41 and 42 that can be engaged with both end surfaces of the chain box 27 are provided on both left and right sides of the substrate 10, and the limit switches 41 and 42 allow the seat frame 3 to rotate in the rotation direction. Is detected. On the upper surface of the upper lid 2 a of the base 2, for example, five ridged dogs 43 are radially arranged at an equal angle of 45 °, and a pair of limit switches 44 and 45 for detecting the dog 43 on the substrate 10 are provided. The rotation positions of the seat frame 3 during forward rotation and reverse rotation are confirmed by the limit switches 44 and 45.
[0022]
An annular metal fitting 47 containing an insulating ring 46 is fixed to the chain box 27, and a rod-shaped sensor unit 48 penetrating the insulating ring 46 is attached to the rail member 21. Five magnetic sensors 49 are arranged at equal intervals in the sensor unit 48, and the annular fitting 47 is sequentially detected by the magnetic sensor 49 as the chain box 27 moves, and the current rotational position of the seat frame 3 is operated. It is displayed on the display panel (not shown) of the seat.
[0023]
According to the rotating seat 1 having the above configuration, as shown in FIGS. 6A to 6E, the seat frame 3 can be rotated by 45 ° by the electric actuator 20, and the orientation of the seat 4 can be changed into five ways. it can. When the electric actuator 20 is driven, the chain box 27 is linearly guided along the rail member 21, so that the chain 26 is securely engaged with the sprocket 18, and the power of the electric actuator 20 is efficiently converted into the torque of the seat frame 3. Can be converted.
[0024]
On the other hand, when the electric actuator 20 stops, the seat frame 3 is held at the stop position by the engagement of the sprocket 18 and the chain 26. At this time, the rail member 21 guides and supports the entire length including the vicinity of the front end portion of the rack member 19 so that the rack member 19 does not bend and displace in the radial direction of the sprocket 18, and in this example, the chain 26 is a rigid chain box. 27, and the rail member 21 is reinforced by the bracket 34. For this reason, even when a rotational force is applied to the stopped seat due to, for example, a person or an object hitting from outside or acceleration or vibration caused by traveling, the mesh between the chain 26 and the sprocket 18 does not come off, and there is no possibility that the seat frame may be disengaged. 3 is firmly held in the stop position. Therefore, as described above, the member dedicated to rotation prevention conventionally required can be omitted, and the rotation drive mechanism 17 can be configured simply and inexpensively with a small number of components.
[0025]
Note that the present invention is not limited to the above-described embodiment, and may be embodied with appropriate modifications without departing from the spirit of the invention, for example, as described below.
(1) As shown in FIG. 7, a sprocket 18 is provided as a pinion member on the seat frame 3 side, and a rack member 19, an electric actuator 20, and a rail member 21 are provided on the base 2 side. In the illustrated example, the support cylinder 9 is fixed to the upper lid 2 a of the base 2, and the rotary cylinder 13 is provided to project downward from the substrate 10 of the seat frame 3. The needle bearing 14 is interposed between the support cylinder 9 and the rotary cylinder 13, and the sprocket 18 is fixed to the lower end of the rotary cylinder 13. The electric actuator 20 is installed on the bottom plate 2b of the base 2, and other members (the same reference numerals as in FIG. 3) are respectively attached to the lower surface of the upper lid 2a. With this configuration, the same operation and effect as those of the above embodiment can be obtained.
[0026]
(2) Instead of the slide guide type rail member 21, a rolling guide type linear motion guide (LM guide) is used.
(3) The sliding plate 15 is attached to the lower surface of the substrate 10 on the side of the seat frame 3.
(4) Instead of the slide plate 15, a ball bearing is attached to the lower surface of the substrate 10 or the upper surface of the base 2.
(5) In a rotating seat installed on a passenger ship or the like, a seat frame is provided so as to be able to make a full rotation (360 °).
[0027]
【The invention's effect】
As described in detail above, according to the vehicle rotary seat according to the present invention, the rail member guides and supports the rack member, so that the engagement between the rack member and the pinion member is securely held, and the seat frame at the time of stopping is prevented from rotating. There is an excellent effect that the rotation drive mechanism can be simply and inexpensively configured by omitting a dedicated member for performing the operation.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of a vehicle rotating seat according to the present invention.
FIG. 2 is a plan view showing a rotary drive mechanism of the rotary seat of FIG. 1;
FIG. 3 is a sectional view taken along line III-III of FIG. 2;
FIG. 4 is a perspective view of a rack member of the rotary drive mechanism as viewed from the right side in FIG. 3;
FIG. 5 is a perspective view of a rail member of the rotation drive mechanism as viewed from the left side in FIG. 3;
FIG. 6 is a diagram illustrating the operation of the rotating seat.
FIG. 7 is a sectional view showing a modification of the rotation drive mechanism.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rotating seat 2 Base 3 Seat frame 4 Seat 9 Support cylinder 10 Substrate 13 Rotating cylinder 14 Needle bearing 15 Slide plate 17 Rotation drive mechanism 18 Sprocket 19 Chain 20 Electric actuator 21 Rail member 25 Output shaft 27 Chain box 30 Slider 32 Slide guide 33 Bracket 37 Adjustment stand 39 Adjust bolt 51 Rotation drive mechanism F Floor

Claims (3)

In a vehicle rotary seat including a base installed on a floor of a vehicle, a seat frame rotatably supported on the base, and a rotary drive mechanism for the seat frame, the rotary drive mechanism includes a seat frame. A pinion member located at the center of rotation, a rack member meshing with the pinion member, an actuator connected to the base end of the rack member to reciprocally drive the rack member in a tangential direction of the pinion member, and a tangential direction of the pinion member to the rack member And a rail member for guiding and supporting at least the vicinity of the distal end of the rack member so as to be displaceable and not bend and displace in the radial direction of the pinion member, and the pinion member is provided on one of the base and the seat frame. And a rack member, an actuator and a rail member provided on the other side of the base or the seat frame. The vehicle rotating seat according to claim 1, wherein the actuator is an electric actuator. 3. The rotating seat according to claim 1, further comprising a member for adjusting a position of the rail member in a radial direction of the pinion member.

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