JP2002274236A - Rotary device of vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotating device for vehicle seat having compact engaging pieces capable of being shaped from a metal sheet easily and accurately. SOLUTION: An upper plate 1 and a lower plate piece 2 are arranged in such a way as capable of relative rotation through balls 6 and furnished with engaging pieces 4 and 7, respectively, which confront each other at a certain spacing when the upper plate 1 has reached the specified rotating position. The engaging pieces 4 and 7 are formed from metal sheet with central part widened, which is folded back about the center line, and the portions protruding aside from the folded-back part are made engagement parts 431 and 731, and the engaging pieces 4 and 7 are installed on the upper plate 1 and lower plate piece 2 in such an arrangement as invertedly upside down to each other, and the engagement parts 431 and 731 of the engaging pieces 4 and 7 are positioned confronting at the specify spacing. When the upper plate 1 moves in the direction going apart from the lower plate piece 2, the engaging pieces 4 and 7 abut to each other to be in engagement so as to restrict the movement.

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 a vehicle seat, and more particularly to an improvement in the structure thereof.

[0002]

2. Description of the Related Art FIG. 9 shows an example of a conventional rotating device. The rotating device includes a lower plate 81 as a stationary member fixed on a seat leg on the vehicle floor side, and an upper plate 82 as a movable member located above and fixed to the vehicle seat. . Lower plate 81
The upper plate 82 is a ring-shaped member having a substantially rectangular outer shape with a circular opening formed at the center. The four corner portions 821 of the upper plate 82 are bent outward and upward, and a sheet A pin 822 for fixing the frame is provided upright.

The details of the rotating device will be described with reference to FIG.
Rises stepwise, and the inner peripheral portion 813 further rises stepwise from the intermediate portion 812. The inner peripheral portion 831 of the ring-shaped set plate 83 is fixed to the upper surface of the inner peripheral portion 813 of the lower plate 81. The upper plate 82 has an inner peripheral portion 824 descending stepwise from an outer peripheral portion 823 to lower plate intermediate portion 812 and set plate 8.
3 has entered the space between. A part of the plate surface of the middle portion 812 of the lower plate 81 is annularly recessed to form a ball holding groove 81a.
A number of balls 6 are arranged at intervals in the circumferential direction between the inner peripheral portion 824 and a ball holding groove 82a formed in a ring shape on the plate surface. Further, between the ball holding groove 83a formed annularly in the plate surface of the set plate 83 and the ball holding groove 82b annularly formed in the plate surface of the inner peripheral portion 824 of the upper plate 82 opposed thereto. A large number of balls 6 are arranged at intervals in the circumferential direction, and the inner peripheral portion 824 of the upper plate 82 is connected to the intermediate portion 812 of the lower plate 81 via the balls 6 located above and below.
And the set plate 83 so as to be rotatable.

A hook plate 91 having a predetermined width as an engaging body is joined to the lower surface of the corner portion 821 of the upper plate 82, and the hook plate 91 extends downward along the lower surface of the corner portion 821 to extend to a tip portion 911. Are bent in a U-shape. On the other hand, on an outer peripheral portion 811 of the lower plate 81, a hook plate 92 as an engaging body is provided at a position corresponding to the hook plate 91, and a tip 921 of the hook plate 92 is bent in an inverted U-shape to form the hook plate. The front end 911 is opposed to the front end 911 at a predetermined gap. These hook plates 91 and 92 are engaged with each other when a force for pulling up the upper plate 82 is applied from the vehicle seat, thereby restricting the upper plate 82 from being excessively separated from the lower plate 81.

In FIG. 9, an operating lever 84 which is bent in an L-shape in plan view is disposed on the upper plate 82, and its base end 841 is rotatably supported by a bracket 85. As shown, a base end of a locking piece 86 bent in an L-shape is joined to the peripheral surface of the base end portion 841, and the front end of the locking piece 86 passes through a locking hole 832 of the set plate 83 to lock the upper plate 82. The rotation of the upper plate 82 is restricted by being inserted into the hole 825. When rotating the upper plate 82, the operation lever 84 is rotated against the spring force of the spring member 87 (FIG. 9), and the locking piece 86 is disengaged from the locking hole 825. By rotating the upper plate 82 by 180 degrees,
If the locking piece 86 of the operation lever base end portion 841 is inserted into the other locking hole 833 (FIG. 9) of the set plate 83, the sheet can be positioned at the front-back inverted position.

[0006]

FIG. 12 shows the overall shape of the hook plates 91 and 92 used in the above-mentioned conventional rotating device.
The two mutually engaging tip portions 911 and 921 are curved with a radius of curvature R concentric with the circular openings of the upper and lower plates 81 and 82. The above-mentioned distal end portions 911 and 921 which are curved in this way and bent in a U-shape or an inverted U-shape.
Is difficult to achieve accuracy because of the so-called stretch flange forming, and the tips 911 and 921 which need to face each other with a gap of about 1 mm interfere with each other due to a forming error and generate abnormal noise. There was something. Further, according to the stretch flange forming, since the usable metal plate is limited to a relatively thin one having an extensibility, there is a problem that the hook plates 91 and 92 are enlarged in order to receive a large load without fail. .

Accordingly, an object of the present invention is to solve such a problem, and an object of the present invention is to provide a rotating device for a vehicle seat having a compact engaging body which can be easily and accurately formed from a metal plate.

[0008]

According to a first aspect of the present invention, a movable member (1) fixed to a seat member of a vehicle and a movable member (1) fixed to a floor member of the vehicle. A stationary member (2) arranged so as to be relatively rotatable relative to each other, and an engaging body which is opposed to the movable member (1) and the stationary member (2) in a vertical direction when the movable member (1) reaches a predetermined rotational position. (4, 7) is provided, and the movable member (1) is a stationary member.
When moving in the direction away from (2), the engagement body (4,
In the rotating device for a vehicle seat, wherein the engagement members (4) and (7) abut and engage with each other to restrict the movement, the engagement body (4, 7) is formed by folding a metal flat plate having a predetermined shape into a predetermined folding line ( L1), a folded main body (43, 73) formed integrally by folding along the folded line, and a folded engaging portion protruding from the end of the main body (43, 73) on the folded line side. (431, 731), the stationary member (2) and the movable member (1) are provided with engaging portions (43) when the movable member (1) reaches a predetermined rotational position.
1,731) are arranged so as to face each other in the vertical direction. Here, the term "folded shape" includes a shape having a substantially U-shaped cross section, a shape having a substantially V-shaped cross section, a shape in which folded plate bodies are joined together without forming a gap, and the like.

In the first aspect of the present invention, when a force acts to separate the movable member and the stationary member, the engaging portions of the opposed engaging members abut and engage with each other, and the movable member and the stationary member are excessively separated from each other. Is regulated. Here, since the engaging body can be manufactured easily and with high accuracy only by folding the metal flat plate, the engaging portions facing each other with a small gap do not interfere with each other due to a manufacturing error and generate abnormal noise unlike the related art. Also,
Since it is not based on stretch flange forming, it is easy to increase the strength by using a thick metal flat plate, and it is possible to avoid an increase in the size of the engagement body. In addition, since a high-tensile steel sheet having relatively low stretchability can be used, both weight reduction and strength increase can be realized.

In the second aspect of the present invention, the engaging member (4) on the movable member (1) side and the engaging member (7) on the stationary member (2) side are connected to each other by folding the two engaging members (4, 7). It is installed so that the line (L1) is orthogonal in plan view.

In the second aspect of the present invention, since the two engaging members are installed such that the folded lines are orthogonal to each other in a plan view, even if there is a certain error in the installation accuracy of the two engaging members, the engaging portions can be reliably formed. Can be confronted. In particular, when the folded line of one of the engaging members is directed in the rotation direction of the movable member and the folded line of the other engaging member is directed in the direction orthogonal to the rotation direction, the movable member is slightly shifted from the predetermined rotation position. Also, the engaging portions can be reliably opposed to each other.

The reference numerals in the parentheses indicate the correspondence with the specific means described in the embodiments described later.

[0013]

(First Embodiment) FIG. 1 shows an appearance of a rotating device. The rotating device includes an upper plate 1 as a movable member having a rectangular outer shape, and the upper plate 1 is a ring-shaped member having a circular opening 11 formed in the center. Bolts 121 for fixing the seat frame 53 are provided upright on the upper surface of each corner 12 on the upper plate 1, and an engaging body 4, which will be described in detail later, is provided on the lower surface of the plate near each bolt 121. I have.

A lower plate 2 as a stationary member is provided below the upper plate 1. The lower plate 2 has a rectangular external shape substantially the same shape as the upper plate 1, and has a circular opening formed at the center. Shape. The lower plate 2 is mounted on the seat leg 5, and each leg 51 of the seat leg 5 is supported on a slide rail 52 provided on the vehicle floor.

On the upper surface of each corner 21 of the lower plate 2,
As shown in FIG. 2, an engagement body 7 is provided to face each of the engagement bodies 4 provided on the upper plate 1. The engagement body 7 is formed by bending a metal plate into a substantially inverted U-shape.
The open end is opened horizontally to fix the fixing flanges 71, 72.
And is joined to the plate surface of the lower plate 2. That is, as shown in a plan view in FIG. 5, the engaging body 7 is configured such that the metal plate body 10 having the central portion 101 stepped to one side and having a wide width is substantially along the folding line L1 extending through the center of the central portion 101. 5 is folded back into a U-shape (substantially inverted U-shape) to form a main body 73 (FIG. 2), and the folded open ends 102 and 103 are shown in FIG.
Are bent outward at a substantially right angle along the two-dot chain line to form the fixing flanges 71 and 72. At this time, a portion of the main body 73 formed by folding back and protruding laterally in a folded shape from the end on the side of the folding line L1 becomes an engaging portion 731 having a substantially inverted U-shaped cross section. On the other hand, the upper plate 1 is provided with the engagement members 4 on the lower surface of each corner 12 (FIG. 1) as described above, and these engagement members 4 are, as shown by the chain lines in FIG. 7 are arranged to face each other in the vertical direction. The engaging portion 431 having a substantially U-shaped cross section extending horizontally from the main body portion 43 of the engaging body 4 inward in the radial direction of the rotating device has an engaging end surface 431a of an open edge thereof. A predetermined gap is formed in the vertical direction so as to face the engaging end surface 731a of the opening edge of the engaging portion 731 extending horizontally outward in a plan view.

FIG. 3 shows the positional relationship between the upper plate 1 and the lower plate 2. In the upper plate 1, an intermediate portion 15 between the outer peripheral portion 13 and the inner peripheral portion 14 is slightly bent and depressed upward, and a part of the depressed surface is a ball receiving surface 1a. A ring-shaped set plate 3 is coupled to the lower surface of the inner peripheral portion 14 of the upper plate 1, and the outer peripheral portion 31 of the set plate 3 is bent slightly below the intermediate portion 15 of the upper plate, and then further horizontally. Bends into
The upper surface of the bent portion is the ball receiving surface 3a. The inner peripheral portion 22 of the lower plate 2 rises greatly, and the intermediate portion 15 of the upper plate 1 and the outer peripheral portion 31 of the set plate 3
Extends between. The inner peripheral edge of the raised inner peripheral portion 22 serves as a ball receiving portion 23, which is bent obliquely inward (leftward in FIG. 3) into the apparatus, bent obliquely upward, and further horizontally. . The ball receiving surfaces 1a and 3a of the upper plate 1 and the set plate 3 and the ball receiving surfaces 2 formed on the upper and lower surfaces of the bent portion of the ball receiving portion 23.
The ball 6 held by a ring-shaped ball holding plate 61 as shown in FIG.
As described above, the balls 6 are positioned obliquely inside and outside the ball receiving portion 23 of the lower plate 2.
The ball receiving portion 23 is connected to the upper plate 1
The upper plate 1 is rotatably supported by holding the upper plate 1 with the set plate 3 from the inner peripheral side of the apparatus. The rotation of the upper plate 1 is regulated, for example, in the same manner as described in the related art (see FIG. 11), and the locking piece of the operation lever (not shown) provided on the upper plate 1 is provided on the set plate 3. This is performed by a structure that is inserted into the locking hole of the lower plate 2 through the hole.

Here, when a force such as pulling up the upper plate 1 is applied from the vehicle seat, the engaging end surfaces 4 of the engaging portions 431 and 731 of the engaging members 4 and 7 facing up and down.
The upper plate 1 is restricted from being excessively separated from the lower plate 2 due to the abutment and engagement of the upper and lower plates 31a and 731a. As described above, the engaging members 4 and 7 of this embodiment can be manufactured easily and with high precision by folding the metal plate 10, so that the engaging portions 431 and 73 facing each other with a small gap are provided.
The conventional problem that the 1s interfere with each other due to manufacturing errors and generate abnormal noise does not occur. In addition, since it is not the stretch flange forming as in the related art, it is easy to increase the strength by using the thick metal flat plate 10, and it is possible to avoid an increase in the size of the engagement body. Further, since a high-tensile steel sheet having relatively low stretchability can be used, both weight reduction and strength increase can be satisfied.

(Second Embodiment) As shown in FIG. 6, projecting portions 432 and 732 projecting upward or downward are formed at the tips of the engaging portions 431 and 731 of the engaging members 4 and 7. According to such a structure, when the upper plate 1 is rotated to a predetermined position, as shown in FIG. 7, between the protrusions 432 and 732 of one engagement body 7 and the main bodies 43 and 73, the other is provided. The protrusions 432 and 732 of the engagement bodies 4 and 7 are located at a predetermined gap, and not only excessive movement of the upper plate 1 and the lower plate 2 in the vertical direction, but also excessive movement in the radial direction (the horizontal direction in FIG. 7). Movement can be restricted.

(Third Embodiment) In the present embodiment shown in FIG. 8, the engagement members 7A to 7A having the same shape as those described in the second embodiment are provided on each corner 21 of the lower plate 2 (see FIG. 1). 7D
Is provided. Of these, the engagement members 7A and 7B are provided on lower plate corners 21 located on the left and right sides of the vehicle front side, and the engagement members 7C and 7D are provided on lower plate corner portions 21 located on the left and right sides of the vehicle rear side. ing. The engaging members 7A and 7C are located symmetrically with each other on the same circumference with respect to the rotation center O of the rotating device, while the engaging members 7B and 7D
Are located symmetrically with each other on the same circumference with respect to the rotation center O of the apparatus, and are located on the inner peripheral side with respect to the engagement bodies 7A and 7C. Then, the engaging portions 731 of the engaging bodies 7A and 7C
Faces inward in the radial direction of the rotating device, while the engaging members 7B and 7
The engaging portion 731 of D faces radially outward.

The engagement members 4A and 4B provided on the lower surface of the upper plate 1 are provided at 90 degrees apart from each other in the circumferential direction, and are opposite to each other from both sides of the main body 43 in the second embodiment. The engagement portions 431 having the same projections 432 as are formed in the shapes protruding respectively. The engaging body 4A is on the circumference where the engaging bodies 7A and 7C are located, and the engaging portion 431 is oriented in the circumferential direction, while the engaging body 4B is on the circumference where the engaging bodies 7B and 7D are located. And the engaging portion 431 faces in the circumferential direction.

In such a structure, at one rotation end of the vehicle seat, the main body 43 of the engagement members 4A and 4B abuts against the side surfaces of the engagement portions 731 of the engagement members 7A and 7B, and the vehicle seat is further extended. Rotation is regulated. In this state, one of the engaging portions 431 of the engaging bodies 4A and 4B is engaged with the engaging bodies 7A and 7B.
Of the engaging portions 431 and 731 are opposed to each other at substantially right angles. In this state, when the upper plate 1 moves upward away from the lower plate piece 2, the main bodies 43, 73 and the protrusions 432, 732 of the engagement bodies 4A, 4B and 7A, 7B.
The open end surfaces 431a and 731a between the two are securely brought into contact with each other to restrict the movement.

When the vehicle seat is turned to the other rotating end, the engaging member 4A provided on the upper plate 1 passes near the outer side of the engaging member 7B through the outer peripheral path L2 as shown by the arrow in the drawing. , The engagement portion 731 reaching the engagement body 7C
The main body 43 of the engagement body 4A comes into contact with the side surface. At this time, at the same time, the engagement body 4B moves to the inner circumferential side locus L as shown by the arrow in the figure.
3 and near the inside of the engagement body 7C,
And the main body 4 of the engaging body 4B
3 contacts. Thereby, further rotation is restricted in a state where the vehicle seat faces the rear of the vehicle. In this state, the other engaging portion 431 of the engaging members 4A and 4B is
The engaging portions 731 of C and 7D intersect at a substantially right angle with each other in a plan view and confront in the vertical direction. As described above, the upper plate 1 excessively moves in the direction away from the lower plate piece 2. Make sure you do. In the present embodiment, an engagement body is further provided on the lower surface of the upper plate 1 at a symmetric position of each of the engagement bodies 4A and 4B, and when the vehicle seat is positioned toward the vehicle front or the vehicle rear, the upper plate 1 The four engaging members may be configured to engage with the engaging members 7A to 7D of the lower plate pieces 2 respectively. Further, the engagement members 4A and 4B may be provided on the lower plate 2 and the engagement members 7A to 7D may be provided on the upper plate 1.

[0023]

As described above, according to the vehicle seat rotating apparatus of the present invention, the engaging member for preventing the movable member and the stationary member from being separated from each other is easily and accurately formed from the metal plate. Therefore, generation of abnormal noise can be prevented, and a compact shape can be obtained.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a rotating device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a lower plate piece.

FIG. 3 is a partial perspective view of a ball holding plate.

FIG. 4 is a vertical sectional view of a main part of the rotating device.

FIG. 5 is a plan view of a metal plate.

FIG. 6 is a perspective view of an engagement body according to a second embodiment of the present invention.

FIG. 7 is a side view of the engagement bodies in a state where they are engaged with each other.

FIG. 8 is a perspective view of an engagement body showing a third embodiment of the present invention.

FIG. 9 is an overall perspective view of a conventional rotating device.

FIG. 10 is a vertical sectional view of a main part of the rotating device.

FIG. 11 is a sectional view taken along the line XI-XI in FIG. 9;

FIG. 12 is a perspective view of a hook plate.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Upper plate, 2 ... Lower plate piece, 4 ... Engagement body, 43 ... Body part, 431 ... Engagement part, 6 ... Ball, 7 ...
Engagement body, 73: body part, 731: engagement part, 10: metal plate, 101: central part, L1: return line.

Claims (2)

[Claims] 1. A movable member fixed to a seat member of a vehicle and a stationary member fixed to a floor member of the vehicle are rotatably disposed relative to each other. When the movable member reaches a predetermined rotation position, an engaging body is provided which vertically opposes each other, and when the movable member moves in a direction away from the stationary member, the engaging bodies abut and engage with each other. In the rotating device for a vehicle seat configured to restrict the movement, the engaging body has a folded shape formed integrally by folding a metal flat plate having a predetermined shape along a predetermined folding line. A main body portion and a folded engagement portion protruding from an end of the main body portion on the return line side, the stationary member and the movable member, when the movable member reaches a predetermined rotational position. The engagement A rotating device for a vehicle seat, wherein parts are installed so as to face each other in a vertical direction. 2. The vehicle seat according to claim 1, wherein the engaging member on the movable member side and the engaging member on the stationary member side are installed such that the folded lines of both the engaging members are orthogonal to each other in plan view. Rotating device.