JP2519205Y2 - Suspension device for vehicle seat - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates mainly to a suspension device for a vehicle seat such as an automobile such as a truck or an off-road vehicle, and particularly to a vehicle having a cushioning function for cushioning shocks and vibrations in vertical and longitudinal directions. Seat suspension device.

[0002]

2. Description of the Related Art Generally, many types of suspension devices for vehicle seats of this type have a structure as shown in FIGS. That is, in the figure, A indicates a suspension assembly, which is a frame-shaped lower frame 1 and a seat cushion (not shown) of a vehicle seat which is arranged above the lower frame 1.
A frame-shaped upper frame 2 that supports the upper frame 2, a link mechanism 3 that supports the upper frame 2 between the upper frame 2 and the lower frame 1 so that the upper frame 2 can move up and down, and a load applied from the seat cushion to the upper frame 2 can be increased and decreased. This is a configuration in which a push-up spring (not shown) that supports the cushioning operation is assembled.

The link mechanism 3 pivotally mounts a pair of left and right link bars 3a and 3b in an X shape, and connecting shafts 3c and 3d extending to the left and right at the upper and lower ends of the link bars 3a and 3b, respectively. Both ends of the upper and lower connecting shafts 3c arranged forward are pivotally connected to the front frames of the left and right frame members of the upper frame 2 and the lower frame 1, and both ends of the connecting shaft 3d arranged rearward are connected to the upper frame 2. And the lower frame 1 is slidably slidably near the rear ends of the left and right frame portions via a rolling roller 3e. As the push-up spring, an air spring or a coil spring is mainly used.

A pair of left and right rails 5 and 5 for front and rear movement are provided on the left and right sides of the lower frame 1 so as to face each other in parallel. These left and right front and rear rails 5 and 5 are made of channel material, and their front and rear ends are fastened to a pair of front and rear mounting bases (rail mounts) 7 via bolts 6 and fixed to the vehicle floor.

As shown in FIG. 6, a front-rear movement roller 8 which slidably fits to the left and right front-rear movement rails 5 and guides and supports the lower frame 1 so that the lower frame 1 can be moved forward and backward is provided at a portion near the left and right front and rear ends of the lower frame 1. Each is pivotally supported. Further, front and rear direction urging springs 9 and 10 for cushioning the front and rear direction are provided on the left and right portions of the lower frame 1, respectively. These longitudinal biasing springs 9 and 10 are tension coil springs, one end of each of which is locked to brackets 11 and 12 projecting to the left and right of the lower rail 1, and the other end of which is one intermediate. The ring member 13 is engaged with the ring member 13 to be connected to each other, and an engaging pin 14 projecting from the inner surface of the longitudinal rail 5 is engaged with the intermediate ring member 13.

The procedure for assembling and installing the vehicle seat suspension device is as follows. First, the lower frame 1, the upper frame 2, the link mechanism 3 and the push-up spring are assembled to assemble the suspension assembly A, and the left and right parts of the lower frame 1 are assembled. The back-and-forth movement rollers 8 are attached to each of them, and the front-rear direction biasing springs 9 and 10 in which the intermediate ring members 13 are connected to each other are assembled. After this, the left and right front and rear movement rails 5 and 5 are respectively applied to the left and right sides of the lower frame 1 from right next to each other, and the front and rear movement rollers 8 are slidably fitted in the left and right front and rear movement rails 5 and 5, and the front and rear direction is set. Biasing spring 9,
10 and the intermediate ring member 13 are set, and the engaging pin 14 protruding from the rails 5, 5 is engaged with the intermediate ring member 13. While holding this state by hand, the front and rear ends of the left and right front and rear rails 5, 5 are joined to the front and rear mounting bases 7, 7 and fastened and fixed by bolts 6. After assembling the entire suspension device in this manner, the entire device is carried into the vehicle body, and the front and rear mounting bases 7, 7 are fastened to the vehicle body floor by bolts (not shown) to be installed and fixed. Then, the seat cushion is attached and supported on the seat cushion.

As a result, the upper frame 2 is linked to the link mechanism 3 by the shock and vibration in the vertical direction generated while the vehicle is running.
While moving up and down via the, the up and down movement is alleviated by the cushioning action of a push-up spring such as an air spring. On the other hand, due to the impact and vibration in the front-rear direction generated by the sudden acceleration or the sudden braking of the vehicle, the lower frame 1 moves back and forth along the left and right front-rear movement rails 5 and 5 through the front-rear movement rollers 8, and The forward and backward biasing springs 9 and 1
It is relieved by the buffering effect of zero. In other words, a seat that is comfortable to sit on can be obtained by cushioning shocks and vibrations in the vertical and longitudinal directions.

[0008]

By the way, the above-described conventional vehicle seat suspension device has a problem in assembly and installation. That is, as described above, the front-rear direction urging springs 9 and 10 are assembled to the left and right parts of the lower frame 1 as members for performing the front-rear direction cushioning action, and the front-rear direction urging springs 9 and 10 are also installed. And the engaging pin 14 for engaging the intermediate ring 13 with the left and right front and rear rails 5
Since the lower frame 1 of the suspension assembly A and the left and right front and rear movement rails 5 and 5 are assembled and set, the left and right front and rear movement rails 5 and 5 are individually separated from each other. Must be applied from the side.

In this state, the left and right front and rear rails 5, 5
Is slidably fitted to the longitudinal movement roller 8 and the engaging pin 14 is engaged with the intermediate ring member 13 of the longitudinal biasing springs 9 and 10, but they can be freely removed right next to each other and are attached in the longitudinal direction. Since it is in a free state in which it can be moved back and forth against the bias springs 9 and 10, these left and right front and rear rails 5, 5
5 must be fastened individually to the front and rear mounting bases 7, 7 while holding them so that they do not fluctuate,
The work was very difficult and troublesome.

Moreover, the front and rear rails 5 and 5 on the left and right sides thereof
Must be fastened and fixed to the vehicle body floor in a state where they are set to the left and right of the lower frame 1 and fastened to the front and rear mounting bases 7, 7 as described above, that is, in the state where the entire suspension device is assembled. Also, since the front and rear mounting bases 7, 7 move forward and backward with respect to the lower frame 1 together with the left and right front and rear rails 5, 5, and the entire apparatus is heavy, the work is extremely difficult. For this reason, the conventional assembly and installation work for the suspension device is complicated, very troublesome, and inefficient.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a simple vehicle seat suspension device that can perform assembly and installation work very easily and efficiently.

[0012]

In order to achieve the above-mentioned object, a vehicle seat suspension device of the present invention comprises an upper frame, to which a seat cushion is attached, above and below a lower frame via a link mechanism and a push-up spring. And a suspension assembly that is supported so as to be able to perform a buffering action in the same direction, and is fixed to the vehicle body floor side and arranged in parallel on the left and right of the lower frame of the suspension assembly, or combined with a seat cushion frame and arranged on the left and right of the upper frame. A pair of right and left rails for front and rear movement, and a front and rear movement roller slidably fitted on the left and right front and rear movement rails, and a front and rear direction engaging with the rails through an engaging member to perform a front and rear cushioning operation. Bias springs are provided on the left and right parts of the lower frame or the upper frame, and the left and right rails for longitudinal movement are Note that the lower frame or the upper frame in which the front-rear movement roller and the front-rear direction biasing spring are assembled can be slidably inserted into each other, and are connected to each other by front and rear connecting members to form a frame shape, and the engaging member is It is characterized in that it is configured so that it can be inserted into and removed from the left and right rails for forward and backward movement and is engaged with the forward and backward biasing springs.

[0013]

According to the suspension device for a vehicle seat having the above-described structure, the suspension assembly is assembled by the lower frame, the upper frame, the link mechanism and the push-up spring, and the front and rear movement rollers are attached to the left and right parts of the lower frame or the upper frame, respectively. At the same time, attach the front-back direction biasing spring. On the other hand, the left and right front and rear movement rails are connected to each other by front and rear connecting members to form a frame shape.

In the case where the left and right front and rear rails guide and support the lower frame so as to be movable back and forth, they are fastened and fixed to the vehicle body floor through the front and rear connecting members in the frame shape. After that, the lower frame in which the front-rear movement roller and the front-rear direction biasing spring are assembled on the left and right sides is slidably inserted into the state where the front-rear movement roller is slidably fitted between the left and right front-rear movement rails. In this state, the engaging member is inserted so as to be inserted into the left and right front-rear movement rails and engaged with the front-rear direction biasing spring, and the assembly and installation of the entire apparatus is completed. In this state, the seat cushion is attached and supported on the upper frame.

Further, in the case where the left and right front and rear rails are guided and supported together with the seat cushion so as to be movable back and forth with respect to the upper frame, the lower frame of the above-mentioned suspension assembly is fastened and fixed to the vehicle body floor. afterwards,
As described above, the front-rear movement rollers and the front-rear direction biasing springs are assembled on the left and right sides of the upper frame in a state in which the left-right front-rear movement rails are connected to each other by sliding the front-rear movement rails. Insert it in the fitted state,
In that state, the engaging member is inserted so as to be inserted into the left and right front-rear movement rails and engaged with the front-rear direction biasing spring, and the assembly and installation of the entire apparatus is completed. In this state, seat cushions are attached and supported above the left and right front and rear rails and the front and rear connecting members.

Since the apparatus can be assembled and installed as described above, the troublesome work of tightening the bolts while holding the left and right rails for forward and backward movement individually so as not to sway as in the prior art is unnecessary. The moving rails can be set on the left and right sides of the lower frame or upper rail very easily, and can be assembled and fastened to the vehicle body floor in a semi-assembled state. The troublesome work of fastening and fixing to the vehicle body floor can be eliminated, and as a whole, the assembly and installation work can be performed very easily and efficiently.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

It should be noted that, in the figure, the same components as those shown in FIGS. 5 and 6 are designated by the same reference numerals to simplify the description, and the overall configuration is substantially the same as that shown in FIG. Omit it.

First, FIG. 1 shows a lower frame 1 and left and right front and rear movement rails 5 and 5 of a vehicle seat suspension system.
It is an exploded perspective view showing the relationship with. That lower frame 1
Is assembled in the shape of a rectangular frame in the same manner as the conventional one, and the link mechanism 3 and the push-up spring (not shown) are arranged above this as shown in FIG.
Upper frame 2 for buffering movement in the vertical direction via
Is supported, and a seat cushion (not shown) is mounted thereon. Left and right front and rear movement rails 5 and 5 fixed to the vehicle body floor are provided on the left and right sides of the lower frame 1 so as to be opposed to each other in a parallel state as described later.

Here, near the front and rear ends of the left and right parts of the lower frame 1, a front and rear movement roller 8 which is slidably fitted to the left and right front and rear movement rails 5 and guides and supports the lower frame 1 so as to be movable back and forth. And the front and rear direction urging springs 19 and 20 for cushioning the front and rear direction are provided on the left and right portions of the lower frame 1, respectively.

The front-rear direction urging springs 19 and 20 are compression coil springs, and are mounted in series in the front-rear direction via a guide shaft 22 in a U-shaped bracket 21 which is screwed and fixed to the left and right portions of the lower frame 1. Has been done. It should be noted that spring seats 23, 24 are provided at the front and rear ends of the front-rear direction urging springs 19, 20.
A rectangular tubular center collar 25 is interposed between the 9 and 20. The center collar 25 has an annular groove 25a in the middle.

The left and right front and rear rails 5 and 5 are made of channel material, and the left and right front and rear rails 5 and 5 are formed.
Is connected to the mounting bases 26 and 27, which are front and rear connecting members, by welding or the like to form one frame shape in advance. The mounting base 27 on the rear end side is made of Z-shaped steel so as to completely close the rear end between the left and right rails 5 and 5 for front and rear movement, but the mounting base 26 on the front end side is in the middle of the upper surface of the angle member. The left and right front and rear rails 5 and 5 are joined to the lower parts of the front ends of the front and rear rails 5 and 5 so that the front ends of the left and right front and rear rails 5 and 5 are opened. The longitudinal movement roller 8 and the longitudinal biasing spring 1
The lower frame 1 in which 9 and 20 are assembled on the left and right sides is structured so as to be slidably inserted between the left and right front and rear movement rails 5 and 5.

A pair of left and right lock holes 5a, 5a are formed in the upper and lower plates of the left and right front and rear rails 5, 5 at a substantially middle position in the front-rear direction. The lock holes 5a, 5a have an inverted U-shape. As shown in FIG. 2, the bifurcated legs of the engaging member 28 are inserted so as to be insertable and removable from above, and the front-back direction biasing spring 1 is formed.
The annular groove 25a of the center collar 25 between 9 and 20 can be engaged.

In addition, pin holes 5b are formed in the front end portions of the upper and lower plates of the left and right front and rear rails 5, 5 so that the retaining pins 29 can be removably inserted into and engaged from above. Has become.

According to the above-described vehicle seat suspension device, the lower frame 1, the upper frame 2, the link mechanism 3, and the push-up spring are assembled to assemble the suspension assembly A. The front and rear movement rollers 8 are attached to the left and right portions of the lower frame 1 of the suspension assembly A, and the front and rear direction biasing springs 19, via the U-shaped bracket 21, the guide shaft 22, the spring seats 23 and 24, and the center collar 25. Install 20. On the other hand, the left and right front and rear rails 5, 5 are connected to the front and rear mounting bases 26, 27 to form one frame shape in advance.

Then, the left and right front and rear movement rails 5 and 5 and the front and rear mounting bases 26 and 27 in the framed state are carried into a predetermined position of the vehicle body floor, and the front and rear mounting bases 2 are carried.
By fastening 6 and 27 to the vehicle body floor with bolts, the left and right front and rear movement rails 5 and 5 are fixed. After this, the lower frame 1 assembled in the above-described manner to support the upper frame 2 and the front-rear movement roller 8 and the front-rear direction urging springs 19 and 20 assembled on the left and right portions is used for the left-right front-rear movement. The rails 5, 5 are slidably inserted between the rails 5, 5 so that the front and rear direction biasing springs 19, 20 of the left and right portions of the lower frame 1 and the center collar 25 are housed in the channel grooves of the rails 5, 5 for left and right movement. At the same time, the left and right front-rear movement rollers 8 are slidably fitted.

In this state, left and right front and rear rails 5, 5
The retaining pin 29 is inserted into and engaged with the pin hole 5b at the front end from above to prevent the left and right front and rear movement rollers 8 from coming out forward, that is, the lower frame 1 is prevented from coming out forward. Further, while the lower frame 1 is appropriately moved back and forth with respect to the left and right front and rear movement rails 5 and 5, a reverse U is formed in the lock holes 5a and 5a of the left and right front and rear movement rails 5 and 5.
The bifurcated leg of the character-shaped engaging member 28 is inserted from above to
As shown in FIG. 5, the front and rear direction biasing springs 19 and 20 are engaged with the annular groove 25a of the center collar 25. This completes the assembly and installation of the entire apparatus, and in this state, the seat cushion is attached and supported on the upper frame 2.

As described above, the left and right front-rear movement rails 5,
5 is connected to the front and rear mounting bases 26 and 27 and fixed to the vehicle body floor in a frame state.
The lower frame 1 of the suspension assembly A is slidably fitted between the five, and finally the center collars 25 of the front-rear direction biasing springs 19 and 20 on the left and right parts of the lower frame 1 are attached to the left and right front-rear rails 5 and 5. Since the engaging members 28 are inserted through the lock holes 5a, 5a, the troublesome work of bolting while holding the left and right front and rear rails 5, 5 so that they do not sway individually is unnecessary. ,
It is very easy and efficient to set the left and right front and rear rails 5 and 5 and the lower frame 1, and the fastening and fixing work to the vehicle body floor can be done easily. The troublesome work of fastening and fixing to the floor will be eliminated.

In the vehicle seat suspension device assembled and installed as described above, the upper frame 2 moves up and down through the link mechanism 3 in accordance with the vertical shock and vibration generated while the vehicle is running, and the vertical movement of the upper frame 2 also occurs. Is mitigated by the cushioning action of a push-up spring such as an air spring, while the lower frame 1 is moved forward and backward through the rollers 8 for forward and backward movements due to front and rear impacts and vibrations caused by sudden acceleration and braking of the vehicle. It moves back and forth along the moving rails 5 and 5, and its back and forth movement is mitigated by the buffering action of the forward and backward urging springs 19 and 20 engaged with the left and right forward and backward moving rails 5 and 5 via the engaging member 28. It This softens the shocks and vibrations in the up-down and front-back directions, improving the seating comfort.

The present invention is not limited to the above-described embodiment, but a center collar 30 as shown in FIGS. 3 and 4, for example, may be interposed between the front-back direction urging springs 19 and 20. Is also possible. This center color 3
Reference numeral 0 denotes a projection 30a protruding from the upper surface of a rectangular tubular body, and a cap-shaped engaging member 3 that engages with the projection 30a.
1 may be configured to be insertable into and removable from the lock holes 5c formed in the upper surface plates of the left and right front and rear movement rails 5 from above.

Further, the above-mentioned center collar has a ring shape as shown in FIG. 6, and pin-shaped engaging members (not shown) which engage with the center collar are provided on the outer plates of the left and right front-rear movement rails 5. It is also possible to have a structure in which the formed lock hole can be inserted and removed laterally.

Further, in the above-described embodiment, the example in which the left and right front and rear rails 5 and 5 are fixed to the vehicle body floor side to guide and support the lower frame 1 so that the lower frame 1 can be moved back and forth is described. The same applies to the type in which the rails 5 and 5 are arranged in parallel on the left and right of the upper frame 2 of the suspension assembly A and are supported together with the seat cushion so as to be movable back and forth with respect to the upper frame.

In this case, although not shown, the lower frame, the upper frame, the link mechanism and the push-up spring are assembled to assemble the suspension assembly A, and the left and right parts of the upper frame are combined with the forward / backward movement roller and the forward / backward biasing spring. Assemble. On the other hand, the left and right front and rear movement rails are connected to each other by front and rear connecting members to form a frame shape. This frame-shaped body is upside down from that shown in FIG. And
The lower frame of the suspension assembly A described above is fastened and fixed to the vehicle body floor side. Thereafter, while sliding the left and right front and rear rails connected to each other by the framing, the front and rear movement rollers are slid to the left and right of the upper frame in which the front and rear movement rollers and the front and rear direction biasing springs are assembled to each other as described above. Is slidably fitted, and in that state, the engaging member is inserted so as to penetrate the left and right front and rear rails and engaged with the front-rear direction biasing spring, and the assembly and installation of the entire device is completed. It may be configured. In this state, seat cushions are attached and supported above the left and right front and rear rails and the front and rear connecting members. Even with this, substantially the same operational effects as the above-described embodiment can be obtained.

[0034]

Since the suspension device for a vehicle seat of the present invention is constructed as described above, the troublesome work of tightening the bolts while holding the left and right rails for forward and backward movement individually so as not to sway is unnecessary. , The left and right front and rear rails can be set very easily on the left and right of the lower frame or the upper rails, and can be assembled and fastened to the vehicle floor in a semi-assembled state. The troublesome work of fastening and fixing to the vehicle body floor in the assembled and heavy state can be eliminated, and as a whole, the assembling and installing work can be performed very easily and efficiently.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a relationship between a lower frame and left and right front and rear movement rails showing an embodiment of a vehicle seat suspension device of the present invention.

FIG. 2 is a partial cross-sectional view of an assembled state of the lower frame and the front-rear movement rail of the above embodiment.

FIG. 3 is a perspective view of a center collar and an engaging member according to another embodiment of the present invention.

FIG. 4 is a cross-sectional view of a part of the assembled state of the lower frame and the front-rear movement rail using the same center collar and engaging member.

FIG. 5 is a schematic perspective view of an entire vehicle seat suspension device showing a conventional example.

FIG. 6 is an exploded perspective view of a lower frame and left and right front and rear movement rails of the conventional example.

[Explanation of symbols]

A ... Sustain assembly, 1 ... Lower frame, 2 ... Upper frame, 3 ... Link mechanism, 5 ... Rail for forward / backward movement, 8
... Rollers for forward and backward movement, 19, 20 ... Biasing springs in forward and backward directions, 2
6, 27 ... Connecting member, 28, 30 ... Engaging member.

Claims (1)

(57) [Scope of utility model registration request] 1. A suspension assembly supporting an upper frame, to which a seat cushion is attached, above the lower frame via a link mechanism and a push-up spring so as to be capable of buffering in the vertical direction, and the suspension fixed to the vehicle body floor side. Front and rear sliding rails that are arranged in parallel on the left and right of the lower frame of the assembly or that are paired with the seat cushion frame and are arranged in parallel on the left and right of the upper frame, and that are slidably fitted on the left and right front and rear movement rails. A suspension device for a vehicle seat in which a moving roller and a front-rear direction biasing spring that engages with the rail via an engaging member to perform a front-rear direction cushioning operation are provided on the left and right portions of the lower frame or the upper frame. In the left and right front-rear movement rails, the front-rear movement rollers and the front-rear direction urging springs are assembled. The lower frame or the upper frame in the state can be slidably inserted into each other, and are connected to each other by front and rear connecting members to form a frame shape, and the engaging member is inserted into and removed from the left and right front and rear movement rails. A suspension device for a vehicle seat, characterized in that the suspension device engages with a longitudinal biasing spring.