JPS6216354Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seat support device suitable for use in a seat such as a driver's cab of a tractor or trailer head that pulls a trailer when a vehicle such as an automobile is running.

In general, vibrations in the longitudinal direction cause more discomfort to occupants of automobiles, such as drivers, etc., than vibrations in the vertical direction. Particularly in the case of a tractor that tows a trailer, large longitudinal vibrations occur in the seat, so in such a case, it is preferable to absorb the longitudinal vibrations generated in the seat as necessary.

Therefore, conventional seat support devices have been proposed that have the function of absorbing vibrations in the longitudinal direction as described above, but in the case of such conventional seat support devices, although they are mounted on the seat slide rail, Separately from the lock-on and lock-off control levers of the original seat slide mechanism for sliding the seat forward and backward to position the seat, there are lock-on and lock-off control levers for the front and rear support (suspension) mechanism to absorb back and forth vibrations. It is possible to lock off the seat slide mechanism while the front and rear support mechanisms are locked off, so if you try to adjust the seat position when both mechanisms are locked off, the front and rear support mechanisms will also operate, causing the seat to move and cause the seat to shift. It is difficult to determine the position well, and since the operating lever for sliding the seat and the operating lever for supporting the seat are provided separately, the structure is complicated and expensive.

The present invention was developed in view of this point, and it is possible to easily position the seat by using a single operating lever to lock the seat slide mechanism and the longitudinal support mechanism so that when one is locked on, the other is locked off. In addition to standardizing the structure, we aim to simplify the structure.
Furthermore, the present invention provides a seat support device that can cancel the absorption of vibrations in the longitudinal direction as necessary when the absorption of vibrations causes discomfort.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 9, taking as an example the case where the present invention is applied to a vehicle seat.

First, for example, in a vehicle seat to which the present invention is applied, as shown in FIG. 1, a slide rail 2 on which a seat support device is mounted at the bottom of a seat 1 is arranged with an operating lever 3 protruding toward the front. At the same time, a free-side slide rail 4 that forms a pair with the slide rail 2 is arranged at a predetermined interval.

2 to 5 show the first embodiment of the present invention, in which the slide rails 2 and 4 are both composed of a movable side rail and a fixed side rail. A rail 2a and a fixed side rail 2b are shown. A bracket 5 is fixed to a predetermined portion of the movable rail 2a, for example, at the center, by welding or the like. Both ends of the bracket 5 are provided with holes 5a into which the operating lever 3 bent at right angles to the sliding direction is inserted. Further, a first lock plate 6 having a substantially U-shape and concentric with the operating lever 3 is disposed between the right-angled ends of the bracket 5, and is further inscribed inside the first lock plate 6 to lock the operating lever 3. A substantially U-shaped second lock plate 7 is disposed concentrically with. The distance in the sliding direction between the bracket 5 and the first lock plate 6 forms a stroke that absorbs the longitudinal vibration of the longitudinal support mechanism, and a biasing member such as a spring 8 is placed between the bracket 5 and the first lock plate 6 as a compression roller. It is placed in a state where it has received a certain amount.

Further, as can be seen from FIG. 5, the first lock plate 6 has a lock portion 6a protruding from its center.
When the first lock plate 6 is rotated in a predetermined direction about the operating lever 3, the lock portion 6a is opened into a notch 5b provided approximately at the center of the bracket 5.
It is designed to interlock with the On the other hand, the second lock plate 7 has a lock portion 7 extending from its center.
a, and when the second lock plate 7 is rotated in a predetermined direction around the operating lever 3, the lock part 7a
is a hole 2 provided in a predetermined part of the fixed side rail 2b.
b ₁ (Figure 3).

Further, a plate 9 is fixed to the operating lever 3 inside the second lock plate 7. This plate 9 has protrusions 9a projecting on both sides, and steps 6b and 7b are provided at both ends of the circumference of the lock plates 6 and 7, respectively, around the operating lever 3.
When the operating lever 3 is rotated, the two lock plates 6 and 7 are engaged with each other and act to rotate both the lock plates 6 and 7.
Then, a hook piece 10 is fixed to the first lock plate 6, and this hook piece 10 and the second lock plate 7 are connected to each other.
If a biasing member such as a spring 11 is stretched between the hole 7c provided in the lock portion 7a of the first lock plate 6 and the second lock plate 6, the lock portion 6a of the first lock plate 6 and the second lock plate 6 are pulled together. The lock portions 7a of the lock plate 7 are connected to the notches 5b of the bracket 5, respectively.
and is in a state of engagement with the hole _2b1 of the fixed side rail 2b. Therefore, from this state, the operating lever 3 is moved to the third position.
As shown in the figure, when the plate 9 is rotated in the direction of arrow C, the protrusion 9a of the plate 9 engages with the step 7b of the second lock plate 7, and the second lock plate 7 is rotated in the direction of the arrow C. The lock portion 7a of the seat 7 is disengaged from the hole 2b1 of the fixed side rail _2b , and the seat slide mechanism becomes locked off, ie, the seat 1 becomes freely movable. One operation lever 3
When rotated in the direction of arrow D as shown in FIG. 4, the protrusion 9a of the plate 9 and the first lock plate 6
The stepped portion 6b of the bracket 5 is engaged, and the first lock plate 6 is rotated in the direction of arrow D, and the lock portion 6a of the first lock plate 6 is disengaged from the notch 5b of the bracket 5, and the front-rear support mechanism is locked off, that is, the front-rear support mechanism is rotated in the front-rear direction. It is in a state where it absorbs vibrations. In other words, in the lock-off state of this front and rear support mechanism, the fixed side rail 2b
Since the space between the second lock plate 7 in the locked-on state and the first lock plate 6 circumscribing it, and the bracket 5 fixed to the movable rail 2a is free, the spring 8 disposed between them becomes free. As a result, vibrations in the longitudinal direction are absorbed.

In order to maintain the lock-off state of this front and rear support mechanism, a leaf spring 1, which is a spring member, is attached to the plate 9.
2 is fixed with a rivet 13 or the like so that the end portion 12a of the leaf spring 12 is hooked onto the stepped portion 9b of the plate 9. To return the leaf spring 1, just apply a little force.
Since 2 is an elastic body, it will overcome the protrusion 9a of the plate 9 and return to its original state.

Next, the operation of this embodiment will be explained. Now, assuming that the operating rail 3 is in a neutral state, that is, not rotated in either direction of arrows C or D, the biasing force of the spring 11 causes the protrusion 7a of the second lock plate 7 to move into the hole 2b ₁ of the fixed rail 2b. The seat slide mechanism is locked on and the seat 1 is fixed in a predetermined position, while the protrusion 6a of the first lock plate 6 is engaged with the notch 2b of the bracket 5 and the front and rear support mechanism is locked on. , in a state where vibrations in the longitudinal direction are not absorbed.

To move the seat 1 from this state and fix it in a proper position, the operating lever 3 is rotated in the direction of arrow C. Then, due to the rotation of the operating lever 3, the plate 9 fixed to this lever also rotates in the direction of arrow C, so that the protrusions 9a at both ends engage with the step 7b of the second lock plate 7, and this second lock plate 7 in the direction of arrow C. The protrusion 7a of the lock plate 7 which was engaged with the hole _2b1 of the stationary side rail 2b due to the rotation of the second lock plate 7
As shown in FIG. 3, the movable side rail 2a and the fixed side rail 2b are disengaged from each other through the hole _2b1 . As a result, the seat 1 mounted on the movable rail 2a can move freely. At this time, spring 11
The protrusion 6a of the first lock plate 6 due to the biasing force of
is in a state in which it engages with the notch 5b of the bracket 5, that is, in a locked-on state of the front and rear support mechanism, so that the seat 1 does not move back and forth and it is difficult to set its position because the front and rear support mechanism does not work.

When the seat 1 is moved and the operating rail 3 is released at a predetermined position where the hole 2b ₁ of the fixed side rail 2b and the protrusion 7a of the second lock plate 7 engage, the biasing force of the spring 11 causes the hole 2b ₁ and the protrusion 7a to engage. are engaged, the seat 1 is fixed in a predetermined position, and the operating lever 3 is returned to its original state.

In such a state, the operating lever 3 is rotated in the direction of arrow D in order to absorb the longitudinal vibration of the seat 1. Then, by rotating the operating lever 3, the plate 9
also rotates in the direction of arrow D, so the protrusions 9 at both ends
a engages with the stepped portion 6b of the first lock plate 6, causing the first lock plate 6 to rotate in the direction of arrow D. As the first lock plate 6 rotates, the protrusion 6a of the first lock plate 6, which was engaged with the notch 5b of the bracket 5 fixed to the movable side rail 2a, comes off the notch 5b and moves to the fixed side as shown in FIG. The second rail is locked on to rail 2b.
The lock plate 7 and the space between the first lock plate 6 and the bracket 5 that circumscribe the lock plate 7 become free, and the vibrations of the seat 1 in the longitudinal direction are absorbed by the spring 8 disposed between the bracket 5 and the first lock plate 6.

If absorption of vibrations in the longitudinal direction of the seat 1 causes discomfort to the occupant, applying a rotational force opposite to the direction of arrow D to the operating rail 3 causes the end portion 12a of the leaf spring 12 to move to the second lock plate 7. Since the operating lever 3 returns to its original state, that is, the neutral state, and the protrusion 6a of the lock plate 6 engages with the notch 5b of the bracket 5, the seat 1 is fixed without moving forward or backward.

As described above, according to this embodiment, the positioning of the seat 1 and the absorption of vibrations in the longitudinal direction of the seat 1 are performed by changing the direction of rotation of the operating lever 3.
It is easy to operate and has a simple structure.

Further, when positioning the seat 1, the front and rear support mechanisms are in a locked-on state, that is, the front and rear support mechanisms are not activated, so that the seat 1 can be positioned reliably and easily.

Furthermore, the function of the front and rear support mechanism can be released as required, so that the device can be used in any desired state.

In addition, since the operating lever 3 is used as a sliding part of the front and rear support mechanism, and a vibration absorbing spring is disposed here, there is no need to separately provide a sliding part for the front and rear support mechanism, which makes the configuration simpler. It can be made inexpensive.

6 to 9 show a second embodiment of the present invention, and in FIGS. 6 to 9, parts corresponding to those in FIGS. 1 to 5 are given the same reference numerals, and detailed explanations thereof is omitted.

In this embodiment, in order to maintain the lock-off state of the front and rear support mechanism, the leaf spring 12 is not used as in the first embodiment, but the spring 11 that pulls both the lock plates 6 and 7 together is used to maintain the rotation center of the operating lever 3. The idea is to make it more inclined so that it will not return to its original state unless an actuating force is applied.

That is, the bracket 25 is provided with a plurality of cutouts 25b, for example, two cutouts, and a first
The lock plate 26 is also provided with two protrusions 26a, and the first lock plate 26 has a protrusion 26c between the two protrusions 26a in the opposite direction to these protrusions.
is provided, and this protrusion 26c and the second lock plate 2
A spring 11 is stretched between the hole 27c provided in the hole 27c and the hole 27c provided in the hole 27c.

On the other hand, the operating lever 23 consists of lever parts 23a and 23b divided into two parts in the sliding direction, and one end of the lever part 23a is connected to one hole 2 of the bracket 25.
5a, one side end 2 of plate 29 through a hole in each side end of one of both lock plates 26 and 27;
After being fitted into the hole provided in 9b, the lever part 23b is fixed by welding or the like, and one end of the lever part 23b is inserted through the other hole 25a of the bracket 25 and the holes in the other side ends of both lock plates 26 and 27. plate 29
After being fitted into a hole provided in the other side end portion 29b, it is fixed by welding or the like. As in the first embodiment, a spring 8 is disposed between the bracket 25 and the first lock plate 26 and receives a compressed rolling amount.
The spring 11 stretched between the protrusion 26c of the first lock plate 26 and the hole 27c of the second lock plate 27 causes the spring member 11 to lock the operating lever when the front and rear support mechanism is in the lock-off state, as shown in FIG. It is arranged so as to exceed the axis center 23c of 23.

Therefore, in this embodiment as well, by rotating the operating lever 23 in the direction of arrow C, the protrusion 27a of the second lock plate 27 comes out of the hole _2b1 of the fixed side rail 2b and the seat slides as shown in FIG. The mechanism is locked off, that is, the seat 1 is free to move. On the other hand, by rotating the operating lever 23 in the direction of arrow D, the protrusion 26a of the first lock plate 26 is moved into the notch 2 of the bracket 25, as shown in FIG.
5b, the front-rear support mechanism becomes locked off, and vibrations of the seat 1 in the front-rear direction are absorbed. As can be seen from FIG. 9, this state is maintained because the spring member 11 exceeds the axial center 23c of the operating lever 23, and the lock-off state of the front and rear support mechanism can be maintained.

The lock-off state of the front-rear support mechanism is released by returning the operating lever 23 to its original position so that the spring member 11 crosses the shaft center 23c, and the front-rear support mechanism enters a lock-on state, that is, a state in which vibrations in the front-rear direction are not absorbed.

In this way, the same effects as in the first embodiment can be obtained in this embodiment, and furthermore, since it is not necessary to provide the plate 12 as in the first embodiment, the number of parts can be reduced. The number of man-hours required for fixing the plate 12 with screws can also be reduced.

As described above, according to the present invention, the locking state of the seat slide mechanism for adjusting the seat position and the front and rear support mechanism for absorbing vibrations in a predetermined direction of the seat can be changed by using a single operating lever. Since it is controlled by this method, the operation is simple and the structure is also simplified.

In addition, since the locking state of the seat slide mechanism and the front and rear support mechanisms are operated alternately, the front and rear support mechanisms do not work when positioning the seat, so that the seat can be reliably and easily set at the proper position.

Furthermore, the function of the front and back support mechanism can be canceled as necessary, so that when absorbing vibrations in the front and back direction causes discomfort, the function of the front and rear support mechanism can be stopped, allowing for any usage mode.

In the above-mentioned embodiments, the present invention was explained in the case where it was applied to a vehicle seat, but the present invention is not limited thereto, and may be applied to other seats that require such a function.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of a vehicle seat to which the present invention is applied, Figs. 2 to 5 show a first embodiment of the invention, Fig. 2 is a perspective view thereof, and Fig. 3 is a perspective view thereof. and Fig. 4 are operational conceptual diagrams of the main parts cut along line A in Fig. 2, Fig. 5 is an exploded view thereof, and Figs. 6 to 9 show a second embodiment of the present invention. 6 is a perspective view of the same, and FIGS. 7 and 8 are respective views of the 6th
Conceptual diagram of the operation of the main parts shown by cutting along line B in the figure, No. 9
The figure is an exploded view. 1 is a seat, 2a is a movable side rail, 2b is a fixed side rail, 3, 23 are operating levers, 5, 25 are brackets, 6, 26 are first lock plates, 7, 2
7 is a second lock plate, and 11 and 12 are spring members.

Claims (1)

[Scope of utility model registration request] A bracket is fixed to the movable side rail, an operating lever is rotatably and axially movably attached to the bracket, and first and second lock plates are each rotatably attached to the operating lever, A spring is interposed in an operating lever between the first or second lock plate and the bracket, and a lock portion that is engaged with a notch in the bracket of the movable side rail on the first lock plate, and the second lock plate A locking portion that locks into a hole in the stationary side rail is provided on each side, and the locking portions of both the locking plates are rotated and biased in the locking direction, and the locking portion is interposed between the two locking plates to release the locking of both the locking plates. A spring is attached to the plate which is fixed to the operating lever and which is held in the unlocked state by catching on the step of the second lock plate when the first lock plate rotates in the unlocking direction. Slide adjuster made of material.