JP2001163091A - Seat vertical device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize an inexpensive locking mechanism stopping the lifting of a vertical device without generating a large load on a member of the vertical device when an upward load of more than in normal usage acts on the vertical device. SOLUTION: When a set load or more acts on a side of a lower arm 11, anchor brackets 72 and 82 attached on the lower arm 11 moves, a lock pin 46 fixed on the anchor brackets 72 and 82 locks on to one of a plurality of recessed parts 62 of a bracket 42, and the lifting of the vertical device is immediately stopped. By this, generation of a large load on the vertical device 3 can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical device for a vehicle seat.

[0002]

2. Description of the Related Art Conventionally, as this type of vertical apparatus, there is known a vertical apparatus shown in US Pat. No. 4,790,597. The vertical device includes an anchor member including a latch attached to a seat-side bracket and a pole member having one end pivotally connected to a link of the vertical device and having teeth engageable with the latch. A locking mechanism is shown in which when a load exceeding a certain value acts on the seat belt, the latch and the pawl are engaged and locked to prevent the vertical device from moving upward.

[0003]

In order to keep the restraint of the seat belt optimal regardless of the adjustment position of the seat, the structure in which the seat belt is fixed to the seat side member is increasing. With respect to such a seat structure, in the above-described prior art configuration, when a load greater than the locking capacity during normal operation is applied to the vertical device from the seat belt via the seat-side member, the latch and the pawl engage. Although the stop mechanism is immediately engaged and locked, since the pawl is connected to the link, the seat cannot be lifted until the link rotates to the uppermost position. For this reason, when reaching the actual locking position, a large load is generated in the vertical device. In addition, the vertical device needs to use a high-strength member that can withstand the load.

Accordingly, the present invention relates to a method in which a load acting on a seat-side bracket is directly applied to a floor-side bracket when a load greater than a locking capacity during normal operation is applied to a vertical device from a seatbelt via a seat-side member. It is an object of the present invention to provide an inexpensive and lightweight vertical device which is provided with a stopping means and which prevents an excessive load from acting by a locking mechanism for immediately stopping the lifting of the sheet.

[0005]

In order to solve the above-mentioned technical problems, the technical measures taken in the present invention include a seat-side bracket held by a seat-side member and a floor-side bracket fixed on the floor-side member. A seat vertical apparatus comprising: a bracket; a link supporting the seat-side bracket on the floor-side bracket such that the seat-side bracket can be moved up and down; and a driving member for driving the link to move the seat-side bracket up and down. An anchor bracket supported by a bracket, wherein the anchor bracket is arranged to move when a load acting on the anchor bracket is equal to or more than a predetermined value, and is formed on the floor side bracket and the anchor bracket. The engagement of the engagement mechanism causes the seat-side bracket to move with respect to the floor-side member. In which characterized in that a locking mechanism to prevent.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a sheet vertical apparatus according to the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a seat slide device 2 for adjusting the front / rear position of the seat 1 is mounted on a floor 9 of a vehicle, and a seat back 1 is provided on the seat 1 side.
The seat reclining device 10 for adjusting the angle of No. 5 is attached. The seat reclining device 10 has a lower arm 11 that supports a seat cushion 14 and an upper arm 12 that supports a seat back 15. On the other hand, the seat slide device 2 includes an upper rail 22 that can move back and forth, and a vertical device 3 for adjusting the vertical position of the seat 1 is mounted between the upper rail 22 and the lower arm 11 of the seat reclining device 10.

The seat belt 7 has an attachment point 71 for keeping the restraint optimally regardless of the adjustment position of the seat 1.
Is provided on an anchor bracket 72 pivotally supported by the lower arm 11, which is a seat-side member.

As shown in FIG. 2, the pivot point 75 of the anchor bracket 72 with respect to the lower arm 11 is
And a washer spring 77. The washer spring 77 is set and attached so as to generate a sufficient pressing force that the anchor bracket 72 does not rotate even when tension from the seat belt 7 acts on the anchor bracket 72 during normal use. . Further, near the lower end of the anchor bracket 72, a lock pin 46 is mounted so as to stand in the horizontal direction.

Referring again to FIG. 1, a front bracket 32 is fixed near the front end of the upper surface of the upper rail 22 of the seat slide 2, and the rear bracket 4 is fixed near the rear end.
2 is fixed. Further, the front link 31 of the vertical device 3 is pivotally supported at one end by a pin 34 on the front bracket 32 and the other end on the lower arm 11 by a pin 33, and the rear link 41 is on the lower end by a pin 44 on a rear bracket 42. The pin 43 is pivotally supported by the lower arm 11. The vertical device 3 is a pair of left and right sides of a seat, and is configured with a link mechanism that interlocks with each other. In order to adjust the height of the vertical device 3 by rotating the rear link 41 on one side, an adjustment drive mechanism (not shown) including a combination of a motor (not shown) and a screw mechanism (not shown) is provided. , Rear link 4
1 is attached.

As shown in FIGS. 2 and 3, an arc-shaped elongated hole 61 extending obliquely upward is formed on the rear bracket 42. As shown in FIG. On the other hand, a lock pin 46 is fixed near the lower end of the anchor bracket 72 so as to stand in the horizontal direction, and the lock pin 46 is attached through the elongated hole 61. When the height of the vertical device 3 is adjusted, the elongated hole 61 is formed in an arc shape so as to be movable without interfering with the lock pin 46. A plurality of recesses 62 are formed in a front inner surface portion of the elongated hole 61. The width of the concave portion 62 is slightly larger than the diameter of the lock pin 46, and the tension F is applied to the anchor bracket 72 from the seat belt 7 at the time of normal use or more, and when the anchor bracket 72 rotates clockwise in FIG. 46 is configured to be locked in any of the concave portions 62.

With the above configuration, when the tension exceeding a certain set value is transmitted from the seat belt 7 beyond the normal use and the normal state, the lock pin 46 on the anchor bracket 72 is locked in the concave portion 62 of the rear bracket 42. As a result, the raising of the lower arm 11 is stopped immediately,
The load for moving the lower arm 11 upward is immediately transmitted to the upper rail 22 of the seat slide 2 via the lock pin 46 and the rear bracket 42. As a result, it is not possible to suppress the elevation of the seat until the link of the vertical device that is generated when the load is transmitted through the link of the related art rotates to the uppermost position, and a large load is generated on the vertical device. This phenomenon is prevented by the final locking mechanism 5.

FIG. 5 shows another embodiment of the present invention.
In this embodiment, regardless of the load input from the seat belt 7, the weight 18 fixed to the anchor bracket 182 is used.
3, the tooth portion 184 formed on the anchor bracket 182 and the tooth portion 143 formed on the rear bracket 142 are sensed by sensing the load F due to the forward deceleration, and the anchor bracket 182 is normally used. The locking mechanism 180 is configured to be held by a spring 185 attached between the anchor bracket 182 and the lower arm 11 so as not to mesh with the acceleration generated in the state.

Further, as shown in FIG. 4, as a configuration that can increase the degree of freedom in setting the seat belt attachment point or the attachment position of the weight for sensing the deceleration, within a range along the gist of the present invention. A stop mechanism 81 can also be presented. That is, the link 83 is added and the anchor bracket 82
One end of a link 83 is pivotally connected with a pin 84 at a pivot point 75 between the lower arm 11 at the upper end and the lock pin 46 at the lower end, and the other end of the link 83 is horizontally connected to the lower arm 11. It is fixedly attached to a rod 85 which is movably attached in a formed elongated hole 86. Further, the rod 85 is connected to the load input member 87 of the seat belt 7. Alternatively, in a locking mechanism 81 configured to attach a weight (not shown) for sensing a deceleration acceleration on the link 83, a state in which a load exceeding normal use is transmitted from the seat belt 7 to the lower arm 11 in the same manner. Occurs, the lock pin 46 on the anchor bracket 82 is locked in the concave portion 62 of the rear bracket 42, and the lower arm 11 is immediately stopped from ascending. In the locking mechanism 81, the position of the attachment point of the seat belt 7 can be freely selected within a certain range by changing the length of the link 83.

[0015]

According to the present invention, when an upward load greater than the locking capacity during normal operation is applied to the vertical device from the seat side member, the vertical device can be immediately locked within its height adjustment range, In addition, a locking mechanism for directly transmitting a load to the seat-side member is provided, so that a large load is not generated in the vertical device, and an inexpensive and lightweight structure can be realized.

[Brief description of the drawings]

FIG. 1 is a side view of a seat including a vertical device according to the present invention.

FIG. 2 is a sectional view of the vertical device according to the present invention, taken along the line AA in FIG.

FIG. 3 is an enlarged side view of a locking mechanism of the vertical device according to the present invention.

FIG. 4 is a side view of another embodiment of the locking mechanism of the vertical device according to the present invention.

FIG. 5 is a side view of still another embodiment of the locking mechanism of the vertical device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Seat 11 ... Lower arm (seat side bracket) 22 ... Upper rail (floor side member) 3 ... Vertical apparatus 31 ... Front link (link) 32 ... Front bracket (floor side bracket) ) 41 ... rear link (link) 42 ... rear bracket (floor side bracket) 5 ... locking mechanism 55 ... lock pin 72 ... anchor bracket 8 ... locking mechanism 82 ...・ Anchor bracket 142 ・ ・ ・ Rear bracket (floor side bracket) 180 ・ ・ ・ Locking mechanism 182 ・ ・ ・ Anchor bracket

Claims (4)

[Claims] 1. A seat-side bracket held by a seat-side member, a floor-side bracket fixed on a floor-side member, a link for supporting the seat-side bracket to be vertically movable on the floor-side bracket, A driving member for driving the link to move the seat-side bracket up and down, the seat-vertical device having an anchor bracket supported by the seat-side bracket, wherein a load acting on the anchor bracket is equal to or more than a certain value. When the anchor bracket is moved, the anchor bracket is arranged to move, and the engagement of the engagement mechanism formed on the floor bracket and the anchor bracket prevents movement of the seat bracket relative to the floor member. A seat vertical device provided with a stop mechanism. 2. The seat vertical device according to claim 1, wherein a load input link is connected to the anchor bracket. 3. The seat vertical device according to claim 1, wherein the anchor bracket receives a load from a seat belt. 4. The seat vertical apparatus according to claim 1, wherein a load is input to the anchor bracket from a means for sensing a deceleration.