JP2979786B2 - Seat fixing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing device for a seat, which is disposed so as to be able to approach and separate from a floor on a vehicle body side.

[0002]

2. Description of the Related Art Conventionally, trucks, dump trucks,
Work vehicles such as tank lorries and trailers tend to be larger and have higher seating positions year by year. However, the seat on which the occupant sits is considered only for the sitting posture of driving and working for a long time.
Only consideration is given to the provision of stepping and gripping devices such as grips. On the other hand, even in the occupant, not only a healthy driver, but also a female driver, an occupant of the elderly and a physically handicapped person become involved, and not only the above-mentioned vehicle is not only inconvenient, but sometimes Some people need help from others.

[0003] From this point of view, Japanese Utility Model Application Laid-Open No. 1-141141.
In this publication, a vehicle getting-on / off device is disclosed. That is, according to the prior art, the seat body 2 is moved to the outside of the vehicle by the link mechanism shown in FIG. 1 of the publication, and the seat body 2 is moved up and down by the hydraulic cylinder 7 for swing and the hydraulic cylinder 8 for vertical movement. Disclosure technology. Moreover, since the link mechanism is composed of a pair of link members 6a and 6b which are arranged substantially parallel to each other and have substantially the same arm length, the seat seating surface is always kept horizontal. According to the related art, by appropriately setting the length of the arm of the link member, even a large vehicle having a sitting position higher than the ground surface can easily get on and off with the sitting posture.

[0004]

However, if the seat is configured to be detachable from the mounting surface on the vehicle body side as described above, unless a fixing means for securely fixing the seat is provided, vibration, acceleration, and the like during running of the vehicle, and In the unlikely event of an impact at the time of collision or the like, the sheet is disengaged or moves slightly, which is not preferable. On the other hand, if the fixing method is too complicated, it is difficult to easily engage and disengage the fixed state in a short time so that the seat can be quickly brought in and out when getting on and off.

[0005] In view of the disadvantages of the prior art, the present invention provides
It is an object of the present invention to provide a movable seat fixing device which can quickly and reliably fix and release a seat in a seat fixing device which is provided so as to be able to contact and separate a seat on a mounting surface on a vehicle body side.

[0006]

According to the present invention, there is provided a seat fixing device provided so that a seat can be moved toward and away from a mounting surface on a vehicle body side, as shown in FIG. A semicircular tapered engaging concave portion 40 is provided on the bottom surface side of the seat, and an engaging convex portion 45 swingable in a direction of coming into contact with and separating from the opening of the engaging concave portion 40 is provided on the vehicle body 1 side. At the same time, fitting portions 50 and 55 are fixed to the bottom surface side and the mounting surface side of the seat portion 2 so that they can face each other, and the fitting portions 50 and 55 are mounted on the mounting surface side so that the fitting portions 50 and 55 are axles. After the position is regulated in a direction perpendicular or parallel to the above, the engaging convex portion 45 is swung toward the engaging concave portion 40 to fix the seat portion 2 on the vehicle body 1 side. .

In this case, when the engagement of the seat portion 1 is released, the engagement between the two is released only by swinging the engagement convex portion 45 on the vehicle body 1 in a direction away from the engagement concave portion 40. In this state, the sheet can be easily moved to a predetermined position by raising the sheet portion 2 using the sheet lifting mechanism 3. The swing includes not only a linear reciprocating motion but also an arc-shaped curved motion. These oscillating means may be hydraulic cylinders or motor drives, or racks / motors.
It also includes a pinion mechanism and other means may be used. In this embodiment, the fitting portions 50 and 55 are linear V-shaped.
Although formed by the groove and the V projection, the present invention is not limited to this.

[0008]

According to the technical means, first, the seat portion 2 is lowered by using the seat lifting mechanism 3, and the seat portion 2 is simply set on the mounting surface in the vehicle.
Are fitted to each other to regulate the position in the direction perpendicular (parallel) to the axle, and then to the side of the vehicle body side toward the semicircular tapered engagement recess 40 opening on the side perpendicular (parallel) to the axle. By simply swinging the engagement projection 45, it is possible to regulate not only the direction parallel to (or orthogonal to) the axle but also the vertical position, thereby enabling the simple operation of swinging the engagement projection 45 on the vehicle body side. With this, the seat can be securely fixed to the mounting surface.

The engaging projection 45 on the vehicle body 1 side is
Since the engagement of the seat portion 1 can be released only by swinging in the direction away from the seat, the seat attaching / detaching operation is extremely simplified. Also, mechanically, the pair of fitting portions 50, 55
And the engaging concave portion 40 / the engaging convex portion 45 need only be provided on the vehicle body side and the vehicle side, respectively, so that the configuration is simplified.

Further, the fitting portions 50 and 55 are formed with V projections and V
By using the groove, even if a slight deviation occurs when the seat is installed, the position can be accurately regulated using the V-groove as a guide, and the impact at the time of fixing can be reduced. In addition, since the engagement between the engaging concave portion 40 and the convex portion is tapered, the load can be easily dispersed with respect to a large load and impact, and the working space in the vertical direction of the fixing device can be reduced. it can. Furthermore, since the fitting portions 50 and 55 and the engaging portion are V-grooves or semi-circular taper connections, they can be engaged with each other centripetally. Position accuracy over a wide range and reliability can be achieved.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; However, unless otherwise specified, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention, but are merely illustrative examples. Not just. FIG.
FIG. 1 is an exploded perspective view of a main part showing a configuration of a seat moving mechanism including a seat fixing device according to an embodiment of the present invention. FIG. 3 is a front view showing a relationship with a vehicle, and shows a cab 10 having a passenger seat space of a vehicle 1. A slide door 11 that can be opened and closed in parallel with the traveling direction is provided on the side surface. The seat portion 2 includes a seat 12 and a mount 13 for mounting the seat.
Is the floor 4 on the cab 10 side via the seat fixing device 4.
It is disposed so as to be able to be separated and connected to zero.

Reference numeral 3 denotes a seat elevating mechanism, which is swingably disposed by a hydraulic cylinder 31 in a space between a cylinder holder 30 fixedly mounted on a floor 40 and a pair of standing plates of the cylinder holder. Two parallel links 20, 21;
The two parallel links 20 and 21 constitute a cylinder stay 22 that causes the seat to move in an arc. On the other hand, the lower end of the seat stay 22 is fixedly provided along the rear surface of the seat 12 at the rear side of the seat mounting base 13 on the door side. Between the cylinder holder 30 and the upper end of the seat stay 22, there are provided two parallel links 20, 21 having the same distance between the pivot points at both ends as described above.
The engagement devices are rotatably provided substantially parallel to each other.

The lower extension end of the parallel link 20 is rotatably connected to a cylinder rod of a backward-acting hydraulic cylinder 31.
By pressing the back surface to expand and contract the cylinder rod, the seat 12 can be moved in and out of the vehicle in a substantially arc while maintaining the seating posture substantially parallel to the ground.

14 is a foot seat fixed to the seat 12,
Left and right pedal switches 85 and 86 for checking the stepping foot are mounted on the footrest 14. 80 is the sheet 12
The switch is provided on an armrest 16 on the floor on the vehicle center side provided integrally with the seat 12. Further, a three-point seat belt 18 is incorporated in the seat 12, and the seat belt receiver 19 is connected to the seat 12 via a seat belt bracket.
To be detachably fitted to.

On the center floor of the driver's seat, a hand brake 42 and an automatic transmission select bar 43 are provided. Further, a steering wheel (not shown) is also configured to be able to lean forward and backward automatically manually or by an actuator.

Next, a seat fixing device 4 as a main part of the present invention will be described based on a side view showing a cross section of the main part in FIG. 1 and FIG. A horizontal fixing plate 131 is provided integrally with the mounting base 13 on the bottom surface side of the seat mounting base 13 in parallel with the bottom surface with a predetermined gap therebetween, and a hole 132 opened in the center of the horizontal fixing plate 131 is provided. The central edge portion is bulged rearward in a semicircular shape, and the engaging concave member 40 is fixed along the bulged opening 132 a with the screw 43. The engagement concave member 40 is provided with the bulging opening 13.
It is a plate-like member having a semicircular tapered surface 41 diverging upwardly facing the surface 2a, and the semicircular shape of the upper edge of the tapered surface 41 matches the bulging opening 132a.

A pair of V-shaped projections 50 extending parallel to each other along the axle direction are provided on the front and rear sides of the lower surface of the horizontal fixing plate 131 so as to project downward. On the other hand, a fixing plate 51 having a pair of V-grooves 55 on the passenger compartment floor facing the V-projections 50.
Is fixed. The V-groove 55 is provided so as to protrude at a position where the V-groove 55 is fitted to the V-groove 55, and a rubber-like annular member 56 for absorbing vibration of the vehicle body is attached to the concave surface of the V-groove 55. The fixed plate 51 sandwiched between the pair of V-grooves 55
An elongated hole 52 extending in a direction perpendicular to the axle is opened at a position facing the bulging opening 132a at the center, and an engaging convex member is engaged with the bulging opening 132a through the elongated hole 52. 45 is erected.

The engaging convex member 45 includes a tapered portion 46 having a lower surface formed in a circular tapered surface 46a and a shaft member 48 hanging down along the center axis direction of the tapered portion 46. Is connected to a hydraulic cylinder or other reciprocating means 47 so as to be able to reciprocate horizontally in the front-rear direction.

Next, the operation of this embodiment will be described. First, the seat portion is carried into the vehicle cabin by the seat elevating mechanism 3 while the seat portion is maintained substantially horizontal, and the bottom surface side of the seat mounting base 13 is installed on a fixed plate 51 provided on the vehicle cabin floor 40. First, the V projection 50 is formed on the V plate provided on the fixing plate 51.
The two fit together while being guided by the groove 55. As a result, the V-groove 55 and the V-projections 50, 55 are arranged in parallel with the axle, so that movement in a direction perpendicular to the axle (front-rear direction) is restricted, and the upper surface of the tapered portion 46 of the engagement convex member 45. The seat portion 2 is installed at a position where the sheet portion 2 is substantially flush with the horizontal fixing plate 131 on the side of the bulging sheet mounting base 13.

Subsequently, the reciprocating means is moved forward to move the tapered portion of the engaging convex member 45 toward the engaging concave member 40, so that the tapered portion 46 is engaged while being guided by the semicircular tapered surface 41. As a result, the position is regulated not only in the direction parallel to the axle (left-right direction) but also in the vertical direction.
The movement in the direction perpendicular to the axle is regulated by the 5 and V projections 50, and the position of the taper portion 46 in the direction parallel to the axle and in the vertical direction is regulated by engagement of the tapered portion 46 with the semicircular tapered surface 41. Is completely fixed to the passenger compartment floor 40 side.

On the other hand, when releasing the engagement of the seat portion 2, the reciprocating means 47 is moved back to engage the engaging convex member 45.
Of the semicircular tapered surface 41 on the side of the engagement concave member 40
Since it is possible to release the engagement of the seat portion 1 only by further detaching, the seat attaching / detaching operation is extremely simplified. Then, in this state, the seat portion 46 is lifted up through the seat lifting mechanism 3 and is easily carried out of the vehicle in a substantially circular arc.

In this embodiment, the V projection 5
0 on the seat mounting table 13 side, and the V-groove 55
Side, but the V projection 50 is conversely placed on the passenger compartment floor 40 side,
The V-groove 55 may be provided on the seat mounting base 13 side. In this case, dust and foreign matter are less likely to be accumulated in the V-groove 55,
preferable.

[0023]

As described above, according to the present invention, after the seat portion is lowered and the seat portion is set on the mounting surface in the vehicle, the engaging convex portion on the vehicle body side is swung toward the semicircular tapered engaging concave portion. By merely moving the seat, it is possible to regulate not only the direction parallel to the axle (orthogonal direction), but also the vertical position, so that the seat can be securely attached to the mounting surface by a simple operation of swinging the engaging protrusion on the vehicle body side. Can be fixed. Also, the engaging projection on the vehicle body side is
Since the engagement of the seat portion can be released only by swinging in the direction away from zero, the seat attaching / detaching operation is extremely simplified. Also, in terms of mechanism, it is sufficient to provide only a pair of fitting portions and an engaging concave portion / engaging convex portion on the vehicle body side and the vehicle side, respectively, so that the configuration is simplified. And so on.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part showing a configuration of a sheet moving mechanism in which a sheet fixing device according to an embodiment of the present invention is incorporated.

FIG. 2 is an enlarged sectional view of a main part of the seat fixing device of FIG. 1;

FIG. 3 is an overall front view of the seat moving mechanism of FIG. 1;

[Explanation of symbols]

 12 Sheet 40 Engagement concave part 45 Engagement convex part 46 Swing means 50, 55 Fitting part

──────────────────────────────────────────────────続 き Continued on the front page (56) References JP-A 4-137922 (JP, U) JP-A 1-141141 (JP, U) (58) Fields surveyed (Int.Cl. ⁶ , DB name) B60N 2/00-2/54

Claims (1)

(57) [Claims] 1. A seat fixing device provided so that a seat portion can be brought into contact with and separated from a mounting surface on a vehicle body side, wherein a semicircular tapered engaging concave portion opened on a side orthogonal or parallel to an axle is formed in the seat portion. On the bottom side, on the other hand, engaging projections that can swing in the direction of coming into contact with and separating from the opening of the engaging recess are respectively provided on the vehicle body side, and fitted to the seat section bottom side and the mounting surface side, respectively. After the parts are fixed so that they can face each other, and the seat part is installed on the mounting surface side, the two fitting parts are automatically fitted and the position is regulated in a direction orthogonal or parallel to the axle. A seat fixing device wherein the seat portion is fixed to the vehicle body by swinging the engaging protrusion toward the engaging recess.