JPS6120451B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to an improvement of a rotating device in a rotating seat for a vehicle.

b. Prior art and its problems Passenger seats in vehicles may change direction depending on the purpose, and rotating seats are generally widely used. In vehicles where the seat is not fixed, the fixed position of the seat is set close to the window-side inner wall of the vehicle body in order to ensure the width of the center aisle, and if a simple rotation device is installed, it will interfere with the vehicle body and change direction. Since this is not possible, a lateral sliding device is attached to the seat and the lateral sliding device is linked to the rotation of the seat, and the seat is slid sideways toward the aisle only during the direction change operation, but according to the conventional rotating device, The center of the seat can only return to its original design position, that is, when facing the direction of travel, only when it is turned backwards, that is, 180 degrees in the opposite direction, and when it is rotated 90 degrees,
Since the center of the seat is slid sideways towards the aisle, the space in the aisle is reduced, and in vehicles like buses where there is not enough width in the cabin, the seats in the two rows on the left and right can be turned 90 degrees to face each other laterally. When attempting to use it, there was a problem with safety due to the lack of effective width for the passage, and in practice it could only be used in two directions, front and rear.

In addition, a rotating seat in which the lateral sliding device is separated and independent from the rotating device can solve the above-mentioned inconvenience and can be used in three directions (front, rear, and lateral), but the operation when changing direction is complicated and requires three steps. Another drawback was that it caused confusion during emergency evacuations.

c. Purpose of the present invention An object of the present invention is to temporarily move the center of the seat toward the aisle side by a method that simultaneously causes the seat body to perform a rotational motion and a lateral horizontal motion when changing the direction of the seat. Slide horizontally, that is, allow the seat body to rotate while maintaining a gap with the vehicle body, and the horizontal movement reverses direction every time the rotation progresses by 45 degrees, creating a reciprocating motion based on one rotation angle of 90 degrees. It is therefore an object of the present invention to provide a useful rotating device for a vehicle seat, in which the seat body can be used in three directions: front, back, and sideways, and the above-mentioned drawbacks of conventional rotating seats are eliminated.

d Structure of the present invention A sliding frame having a through hole in the center is arranged overlappingly along the horizontal upper surface of a frame-shaped base frame for floor mounting, and the sliding frame is attached to the base frame. They are connected so that they can slide in the lateral and horizontal directions, an annular bearing rail is fixed on the upper side of the sliding frame, a rotary disk for supporting the seat body is arranged above the bearing rail, and the inner circumference of the bearing rail is A hollow frame is disposed in the space below and the frame and the rotary disk are integrally connected, and a bearing rail is fitted into the gap between the frame and the rotary disk to form a bearing section, and the head Four-headed rolling cams whose basic shape is π-shaped and arranged at equal intervals of 90 degrees are integrally connected to the lower end of the frame, and four-headed rolling cams whose basic shape is π-shaped and arranged at equal intervals of 90 degrees are integrally connected to the lower end of the frame. Two rollers are pivotally mounted in opposite positions, and an energizing spring is installed laterally between the base frame and the sliding frame, and the repulsive force of the energizing spring is applied to the rolling cam. When the seat body is rotated by an external force, the rolling cam performs rotational movement and lateral horizontal movement in the form of simultaneous movement, and The direction of the movement is reversed every time the rotation progresses by 45 degrees, forming a reciprocating motion with one cycle of rotation angle of 90 degrees.The isolation effect accompanying the reciprocating motion allows the seat body to rotate while maintaining a gap with the vehicle body. It is configured so that it can be done.

e-1 First Embodiment Fig. 1 is a partially cutaway plan view showing the first embodiment of the present invention, Fig. 2 is a vertical right side view taken along line A-A in Fig. 1, Fig. 4 and Fig. 5 is a diagram of the operating state of the rolling cam, and Fig. 6 is a diagram of the lateral sliding characteristics of the rolling cam. , 2 is a sliding frame for the seat side slide with a large through hole bored in the center, the sliding frame is arranged overlappingly along the horizontal upper surface of the base frame 1, and 3 uses ball bearings, etc. The meshing rollers are pivoted oppositely to the front and rear ends of the sliding frame 2 in a linear arrangement, and are fitted into U-shaped grooves 4 formed at the upper part of the base frame 1. As a whole, the sliding frame 2 can reciprocate in the horizontal and horizontal directions along the U-shaped groove 4, in other words, it is connected to the base frame 1 so as to be slidable in the horizontal and horizontal directions.

The connection structure between the sliding frame 2 and the base frame 1 can be designed as desired as long as the above-mentioned movement of the sliding frame is possible. For example, the meshing roller 3 may be attached to the base frame 1 side, or the meshing Nylon instead of roller 3,
A sliding piece of any shape formed using synthetic resin or the like may be interposed.

Reference numeral 5 denotes an annular bearing rail for supporting the entire rotating part of the device in the vertical and lateral directions. It is integrally connected to the sliding frame 2 via a joint 6. Although the bearing track 5 in this embodiment is formed separately from the sliding frame 2, depending on design considerations, the two may be integrally formed by casting or the like.

Reference numeral 7 denotes a rotary disk for supporting the seat body from below, and the rotary disk is disposed adjacent to the upper surface side of the bearing rail 5. Reference numeral 8 denotes a hollow frame disposed from the inner periphery of the bearing track 52 to the space below, and an annular bearing washer 9 is integrally molded near the upper end of the frame to integrally connect the frame 8 and the rotary disk 7. A bearing section of the device is constructed by fitting the bearing track 5 into the gap between the rotary disk 7 and the bearing washer 9, and the frame 8 and the rotary disk 7 are supported in a rotatable manner while being regulated in their vertical positions.

10, as shown in FIG. 4, is a four-headed rolling cam whose head has a basic shape of π and is arranged at equal intervals of 90 degrees, and the rolling cam is arranged adjacent to the lower end of the frame 8. and is integrally connected to the frame 8 so as to be concentric with the bearing section, and the rotary disk 7,
The main elements of the frame 8 and the rolling cam 10 are integrated to constitute the rotating part of the device. Reference numeral 11 denotes a plurality of connecting bolts for connecting the main elements of the rotating part.

Reference numerals 12 and 12 refer to 2 which are pivotally mounted in the inner pocket of the base frame 1 at a position approximately at the same height as the rolling cam 10 in an opposing arrangement.
The rollers 13 are biasing springs installed horizontally between the base frame 1 and the sliding frame 2 for the purpose of constantly applying rightward thrust to the sliding frame 2. is locked to a member on the base frame 1 side, and the left end is locked to a connecting member 14 fixed to the sliding frame 2, respectively.
The energizing spring 13 adopts the form of a tension spring in this embodiment, but it may be changed to a compression spring depending on design considerations, and the left end is connected to the base frame 1 side, and the right end is a sliding spring. It may be connected to the frame 2 side.

When the sliding frame 2 reciprocates in the lateral horizontal direction, the entire rotating part also makes an accompanying movement, so the repulsive force of the biasing spring 13 acts on the sliding frame 2, causing a rightward thrust to the sliding frame 2. When the rolling cam 10 is operated, its lateral position is dynamically stabilized with the two parts of the head of the rolling cam 10 in contact with the rollers 12 and 12', respectively, and in other words, it is connected to the upper surface of the rotary disk 7. The steady fixed position of the seat body is determined. In this embodiment, the right direction is the window side of the vehicle body, and the left direction is the center aisle side.

In addition, regarding the dimensions, roller 1
2, 12' relative position of each axis, i.e. motion cam 1
Roller 12,1 in comparison with the size of 0
It is necessary to select an appropriate value for the distance between the axes of rollers 12 and 12', and in practice, when the rolling cam 10 is at a 45 degree rotation position as shown in FIG. The distance between the axes is determined so that it is located on each of the X-X line and the Y-Y line, or at the closest point to the axis.

Next, to explain the operation of this embodiment, when a rotational operation force is applied to the seat body from the outside, the rotational force is transmitted to the rolling cam 10 via the rotary disk 7 and the frame 8, and the direction of the rotational force is changed, for example, to the rolling cam 10. 4, the rolling cam 10 tries to cause clockwise movement, so the contact pressure with the roller 12 increases, and conversely, the contact pressure with the roller 12' increases. In other words, a force or moment reaction force is generated in which the rolling cam 10 is twisted to the left using the roller 12 side as a fulcrum. Furthermore, since the axial center positions of the rollers 12, 12' remain stable and unchanged, the moment reaction force acts on the rolling cam 10 as a thrust in the opposite direction to the rightward thrust, that is, as a reverse thrust. On the other hand, since both the sliding frame 2 and the rotating part have the degree of freedom to cause horizontal movement in the left direction, if the rotational operating force applied to the seat body exceeds a predetermined limit, it will act on the sliding frame 2. The reverse thrust becomes larger than the aforementioned thrust, and due to the difference in force, the sliding frame 2 along with its rotating portion moves horizontally to the left, that is, in the direction of arrow Q. At this time, the entire rotating part is of course rotating, and the rolling cam 10 rotates in the direction of arrow P while in rolling contact with the roller 12. In other words, the rolling cam 10 rotates in a simultaneous motion. A horizontal movement occurs in the lateral direction, and the posture changes from the state shown in FIG. 4 to the state shown in FIG.

Figure 5 shows the state in which the rolling cam 10 has rotated 45 degrees, and as the rotation progresses further by 45 degrees, the entire rotating part including the seat body rotates 90 degrees, but the rolling cam 10 rotates 90 degrees.
Since the zero posture returns to a similar shape to the original posture, the direction of horizontal and horizontal motion is repeatedly reversed every time the rotation progresses by 45 degrees, that is, the movement form is a reciprocating motion with one cycle of 90 degrees. . Therefore, for example, if the seat body
When making a 180 direction change, the center of the rolling cam 10 and the center of the seat body repeat two horizontal reciprocating motions in the same behavior, moving away from the window side of the vehicle body and returning back, but the reciprocating motion The isolation effect during this process prevents interference between the seat body and the vehicle body, in other words, the seat body can rotate while maintaining an appropriate gap from the vehicle body.

FIG. 6 illustrates the lateral sliding characteristics of this embodiment, where the horizontal axis represents the rotation angle Q of the rolling cam 10, and the vertical axis represents the lateral movement amount (S'--
S) respectively. In the case of a bus, the worst condition is the gap between the seat body and the vehicle body at a rotation angle of 25 degrees to 30 degrees, but the basic shape of the head of the rolling cam 10 is made into a unique shape, that is, a π-shape. Therefore, as shown in the figure, the amount of lateral movement at the rotation angle of 25 degrees to 30 degrees is increased, in other words, the amount of excess lateral movement exceeding the necessary limit is almost eliminated, and extremely highly efficient lateral sliding characteristics are exhibited. be able to.

Regarding the positional and dimensional relationship of the rollers 12 and 12', when the rolling cam 10 is at a 45 degree rotation position as shown in FIG. - By setting the position on each axis of the Y line or at the closest point to the axis, the rolling contact movement between the rolling cam 10 and the rollers 12, 12' is performed extremely smoothly, and the sixth
No discontinuous changes occur anywhere in the curve of the lateral sliding characteristics shown in the figure, which indicates that the operating force to be applied to the seat itself for turning is kept to a minimum, and that no abnormalities occur during the turning process. .

e-2 Second Embodiment Figure 3 shows only the main parts of another embodiment in which the bearing part of the rotating device of the present invention has a ball bearing structure, and 16 is a hollow frame forming the skeleton of the rotating part; 15 is an annular bearing washer fitted to the frame 16; 17 and 17' are a plurality of bearing balls respectively arranged in the upper and lower sliding gaps of the bearing track 5;
The bearing balls are fitted into concentric circular grooves formed in the bearing track 5 and the bearing washer 15, respectively, and their positions in the radial direction are stably maintained. A taper for vertical adjustment is provided on the lower surface of the bearing washer 15, and a downward taper is formed from the inner circumference to the outer circumference. Reference numeral 18 denotes a plurality of adjustment bolts implanted in the frame 16. The tips of the adjustment bolts support the bearing washer 15 from below, and as the screwing depth of the adjustment bolts 18 increases, the bearing washer 15 is pushed upward. In this way, a mechanism for adjusting the vertical gap between the bearing balls 17, 17' is constructed.

In this embodiment, bearing balls 17, 17'
are arranged on both the upper and lower sides of the bearing rail 5, resulting in a so-called double-row system. However, in a seat with a light load, such as a single seat, the lower bearing ball 17' is omitted, and the bearing washer 15 and the bearing It is also possible to make direct sliding contact with the rail 5 and configure it in a so-called single row system.

In addition, the structure for adjusting the vertical clearance between the bearing balls 17, 17' is such that, for example, a long adjustment bolt is connected to the rolling cam 1.
Any suitable structure utilizing the principle of a screw can be adopted, such as implanting the bearing washer 15 at the bottom of the screw and pushing up the bearing washer 15 from below.

Note that the operation of the device is the same as that in the first embodiment, so a description thereof will be omitted.

f Effects of the present invention According to the present invention, when changing the direction of the seat,
By causing the seat body to simultaneously rotate and horizontally move toward the aisle, the seat body can rotate while maintaining a gap with the vehicle body, and the center of the seat body can be rotated at every 90 degrees of rotation angle. Since it can return to its original design, the seat body can be used in three directions: front, rear, and sideways, which not only has the effect of substantially expanding its use in vehicles with narrow interior widths such as buses, but also allows the seat to be used in three directions: front, back, and sideways. Since the amount of movement of the lateral horizontal movement in the seat includes only a small amount of wasted movement that exceeds the necessary limit, the seat body also has the excellent advantage of changing direction in an extremely efficient manner in a narrow vehicle interior. .

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway plan view showing a first embodiment of the present invention, Fig. 2 is a vertical right side view taken along line A-A in Fig. 1, and Fig. 3 is a main part of the second embodiment. 4 and 5 are operating state diagrams of the rolling cam forming the central part, and FIG. 6 is a lateral sliding characteristic diagram of the rolling cam. 1...Base frame, 2...Sliding frame, 5...Bearing rail,
7... Rotating disk, 8... Frame, 10... Rolling cam, 12, 12... Roller, 13... Empowering spring, 15... Bearing washer, 17, 17... Bearing ball.

Claims (1)

[Scope of Claims] 1. Sliding frames having a through hole in the center are arranged overlappingly along the horizontal upper surface of a base frame for floor mounting, and the sliding frames are arranged horizontally and horizontally with respect to the base frame. Slidably connected,
An annular bearing track is fixed above the sliding frame, a rotary disk for supporting the seat body is arranged above the bearing track, and a hollow frame is arranged in the space inside and below the bearing track. The bearing section is constructed by integrally connecting the frame and the rotary disk, and fitting the bearing rail into the gap between the frame and the rotary disk, and the basic shape of the head is π-shaped and 90 mm. Four-headed rolling cams arranged at equal intervals are integrally connected to the lower end of the frame, and two opposing rollers are placed at approximately the same height as the rolling cams in the inner pocket of the base frame. The rolling cam is pivoted in a symmetrical arrangement, and a biasing spring directed laterally is installed between the base frame and the sliding frame, and the repulsive force of the biasing spring is transmitted to the rolling cam. When the seat body is rotated by an external force while being in constant pressure contact with the rollers, the rolling cam simultaneously performs rotational movement and lateral horizontal movement, and the horizontal movement increases every 45 degrees of rotation. The direction is reversed and the rotation angle is 90
1. A rotation device for a vehicle seat, characterized in that the rotation device performs a reciprocating motion with one cycle of degrees, and is configured to rotate while maintaining a gap between the seat body and the vehicle body due to an isolation effect accompanying the reciprocating motion. 2. A vehicle according to claim 1, characterized in that a bearing ball is disposed in the gap of the bearing part so that the bearing part has a spherical bearing structure, and a structure for adjusting the vertical gap between the bearing balls is provided. seat rotation device.