JP2001233101A - Structure for installing seat for cab-over-engine vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a submarine phenomenon with an occupant seated on a seat of a cab-over-engine vehicle with a simple structure for installing the seat. SOLUTION: In the seat 1 installed on a cab floor 3 of the cab-over-engine vehicle or an engine cover 2 for closing an engine service hole 30 provided in the cab floor 3, a reinforcing plate 4 comprising an approximately angled section and extending to a direction of seat width with forming a closed section with the cab floor 3 or the engine cover 2 is provided to the cab floor 3 or the engine cover 2 in a position corresponding to a front end of the seat 1. The reinforcing plate 4 is made to project into a seat cushion 10 of the seat 1 so as to prevent downwardly forward movement of the lower half of the body of the occupant P, seated on the seat with the upper half of the body restricted by a seatbelt B, by the reinforcing plate 4 at the time of collision of the vehicle and the like, and the submarine phenomenon is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat mounting structure for a cab-over type vehicle, and more particularly to a seat mounting structure for preventing a submarine phenomenon of an occupant sitting on a seat.

[0002]

2. Description of the Related Art At the time of sudden deceleration such as in a vehicle collision, a submarine phenomenon occurs in which an occupant seated on a seat and whose upper body is restrained by a seat belt moves so that the lower body is sneaked forward and downward.

FIG. 4 shows a passenger seat of a cab-over type vehicle in which measures for preventing a submarine phenomenon are taken. A cushion panel 5 provided on the lower surface of a seat cushion 10 of a passenger seat 1A has the same structure. A protruding portion 51 having a front end bent into a mountain shape is formed, and the protruding portion 51 protrudes into the front end of the seat cushion 10. The protrusion 51 is reinforced by a reinforcement 52.

The passenger seat 1A is installed on an engine cover 2 that opens and closes an engine service hall 30 provided on the cab floor 3. In the figure, E indicates an engine. The rear end of the engine cover 2 is connected to the opening edge of the engine service hole 30 by a hinge member 20, and the engine cover 2 is tilted integrally with the passenger seat 1 </ b> A to rotate the engine service hole 3.
Open and close 0.

[0005] In a tilt-type cab-over type vehicle,
Since there is no need to provide an engine service hall,
The passenger seat 1 </ b> A is installed on the cab floor 3. On the other hand, the driver's seat has the same structure as the passenger seat 1A, and is generally slidable back and forth.
The seat is installed on the cab floor via a slide rail.

In the passenger seat 1A and the driver's seat of the cab-over type vehicle having the above structure, when the vehicle suddenly decelerates,
The submarine phenomenon that occurs in the occupant P whose upper body is restrained by the seat belt B is prevented by the protrusion 51 of the cushion panel 5 preventing the lower body of the occupant P from moving forward and downward.

[0007]

By the way, in a structure in which the seat cushion 10 is directly installed on the engine cover 2 or the cab floor 3 like the above-mentioned passenger seat 1A, conventionally, a driver's seat mounted on a slide rail is conventionally used. A cushion panel 5 is provided on the lower surface of the seat cushion 10 in the same manner as the seat, and the cushion panel 5 is overlapped on the engine cover 2 or the cab floor 3 and fixed by bolts. If the cushion panel 5 is omitted, the seat weight is reduced. And
In addition, the cost is reduced. Therefore, an object of the present invention is to provide a seat installation structure for a cab-over type vehicle in which a cushion panel is omitted, a seat is stably held on an engine cover or a cab floor, and a submarine phenomenon of an occupant can be prevented. It was done.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a cab floor of a cab-over type vehicle or a seat installed on an engine cover that closes an engine service hole provided on the cab floor. At the position corresponding to the front end of the seat, a reinforcing plate that extends in the seat width direction with a substantially mountain-shaped cross section and forms a closed cross section with the cab floor or the engine cover is fixed,
The reinforcing plate is made to protrude into the seat cushion of the seat to prevent the seat occupant from submarine phenomenon (claim 1). The seat does not have a cushion panel, but a closed cross-section rigid reinforcing plate provided on the engine cover or cab floor projects inside the front end of the seat cushion, so the occupant seats the seat cushion forward when the vehicle suddenly decelerates forward. Since the load to be moved is received by the reinforcing plate, the sheet is stable. At the same time, the movement of the occupant with respect to the seat cushion is prevented by the reinforcing plate, and the submarine phenomenon is prevented.

A frame-shaped core material is embedded under the seat cushion along the outer periphery of the seat cushion, and is fixed to the cab floor or the engine cover through the core material. By fixing the seat cushion to the engine cover or cab floor with a core material that is much lighter and cheaper than conventional cushion panels, the seat can be installed stably in combination with the reinforcing plate protruding into the seat cushion. it can.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A seat installation structure of the present invention in which a passenger seat 1 is installed on an engine cover 2 will be described with reference to FIGS. In the cab-over type vehicle, the cab floor 3 has a two-stage shape in which the rear half of the cab rises, and an engine room for storing the engine E is formed below the rear half of the floor. The cab floor 3 is provided with an engine service hall 30 on the passenger seat side in the latter half of the floor, and the engine service hall 30 is provided with an engine cover 2 for opening and closing the engine service hall 30.

The engine cover 2 is a metal plate that is substantially flush with the cab floor 3, and its flat surface is used as a seat mounting surface 21, and fixed corners projecting slightly upward from four corners of the seat mounting surface 21 respectively. 22 are formed and the fixed seat 2
2 has a bolt through hole.

The engine cover 2 has a seat mounting surface 21
A reinforcing plate 4 is fixed to the front end of the upper surface along the width direction. The reinforcing plate 4 is a metal plate having a substantially angled cross section in the front-rear direction. The front surface from the front edge to the top has a steep inclination angle, and the rear surface from the top to the rear edge has a slightly gentler inclination angle than the front surface. It is. The reinforcing plate 4 is reinforced by providing a plurality of convex beads 41 at predetermined intervals in the width direction.
The left and right ends of the reinforcing plate 4 are closed, and a coupling flange 42 that overlaps with the sheet mounting surface 21 is formed on the outer periphery of the lower edge. The reinforcing plate 4 forms a closed cross section with the seat mounting surface 21 by welding the outer circumferential connecting flange 42 to the front end of the upper surface of the seat mounting surface 21.

The engine cover 2 has a plurality of hinge members 20 provided on the rear edge thereof coupled to the rear edge of the opening of the engine service hole 30 of the cab floor 3, and is tilted upward and rearward about the hinge member 20 to tilt. It is attached to the cab floor 3 so as to open and close the engine service hall 30. The engine cover 2 is provided in the engine service hall 30.
When closed, the hooks 23 provided at the left and right ends of the front edge engage with lock members (not shown) provided on the cab floor 3, respectively, to lock in the closed state.

The seat cushion 10 of the passenger seat 1 mounted on the engine cover 2 is constituted by covering a pad member formed by molding urethane foam or the like with a skin. A concave portion 11 corresponding to the reinforcing plate 4 of the engine cover 2 is formed at a front end portion on a lower surface of the seat cushion 10, and a ring-shaped core member 6 is provided on an outer periphery of the lower surface. The core member 6 is made of a metal wire having a diameter of about 5 mm to 10 mm, and is embedded in the pad member.

The core member 6 is provided with four mounting brackets 61 corresponding to each mounting seat 22 of the engine cover 2 near four corners. Each mounting bracket 61 is a substantially L-shaped piece of metal, the upper end of a vertical portion is welded to the core member 6, the horizontal portion is flush with the lower surface of the seat cushion 10, and stud bolts projecting downward are provided. is there.

The passenger seat 1 includes a seat cushion 10.
The recess 11 and the reinforcing plate 4 are aligned so that the reinforcing plate 4 protrudes into the front end of the seat cushion 10, and the mounting brackets 61 are aligned with the fixing seats 22 of the engine cover 2 so that the mounting brackets 61 are aligned. The stud bolt is inserted into the bolt through hole of the fixing seat 22, and a nut is fastened to the stud bolt from below the engine cover 2 to fix the stud bolt to the engine cover 2. The passenger seat 1 tilts integrally with the engine cover 2 when the engine cover 2 is opened and closed.

The height of the reinforcing plate 4 is substantially the same as or slightly higher than the height of the rear bottom surface of the rear end of the seat cushion 10 in which the occupant P sits and sinks in the seat cushion 10 of the passenger seat 1. It is set high. The inclination angle of the rear surface of the reinforcing plate 4 is set to be substantially parallel to the thigh of the seated occupant P.

At the time of sudden deceleration such as at the time of a vehicle collision, the passenger sits on the front passenger seat 1 and attempts to move so that the lower body of the seated occupant P whose upper body is restrained by the seat belt B falls forward and downward. A large forward load acts on the seat cushion 10. This load is received by the high-rigidity reinforcing plate 4 having a closed-section structure protruding into the front end of the seat cushion 10 of the engine cover 2. Therefore, the seat cushion 1
No. 0 is fixed to the engine cover 2 only through the ring-shaped core material 6 embedded therein, and is stably held without displacement. At this time, the lower body of the occupant P further attempts to move forward and downward with respect to the seat cushion 10 as shown by the white arrow, but this movement is prevented by the reinforcing plate 4 and the submarine phenomenon is prevented.

The engine cover 2 has a seat belt B of the passenger seat 1 at a position inside the passenger seat 1 on the vehicle side.
The anchor on the buckle side is fixed (not shown). For this reason, a large load acts on the engine cover 2 from the seat bell B that restrains the occupant P when the vehicle suddenly decelerates, via the anchor. In this case, the engine cover 2 is hinged to the cab floor 3 and the front end of the engine cover 2 which is a free end, which has conventionally had a slightly lower bending stiffness with respect to the latter half having a higher bending stiffness, is also provided by a reinforcing plate 4 along the width direction. Since the flexural rigidity is enhanced and the rigidity of the engine cover 2 is increased as a whole, the strength against the load can be sufficiently secured.

Although the description has been given of the passenger seat provided on the engine cover, the tilt-type cab-over type vehicle in which the entire cabin is tilted forward to open the engine room does not require an engine service hall on the cab floor. . Therefore, as shown in FIG.
And a seat cushion 10 of the passenger seat 1 is installed on the cab floor 3 by the same means as in the engine cover. In the drawings, the same members as those in the above embodiment are denoted by the same reference numerals. This embodiment also has the same operation and effect as the previous embodiment.

[0021]

According to the present invention, in a cab-over type vehicle seat installed directly on an engine cover or a cab floor,
By eliminating the seat cushion panel, the weight of the seat can be reduced and the cost of the seat can be reduced. In addition, the seat cushion can be stably held with no displacement against the load applied thereto, and the occupant's submarine phenomenon can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view of a seat installation structure of a cab-over type vehicle according to the present invention.

FIG. 2 is a sectional view taken along a line II-II in FIG.

FIG. 3 is a perspective view of another seat installation structure of the cab-over type vehicle according to the present invention.

FIG. 4 is a cross-sectional view corresponding to FIG. 2 of a conventional seat installation structure.

[Explanation of symbols]

 1, 1A seat 10 seat cushion 2 engine cover 3 cab floor 30 engine service hole 4 reinforcing plate 6 core material P occupant B seat belt E engine

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Toshinari Shioi 100 Kanayama, Ichiriyama-cho, Kariya-shi, Aichi F-term in TOYOTA Auto Body Co., Ltd. 3B087 AA08 CD04 3D003 AA05 BB09 CA14 DA19

Claims (2)

[Claims] 1. A seat installed on a cab floor of a cab-over type vehicle or an engine cover for closing an engine service hole provided in the cab floor, wherein the cab floor or the engine cover has a position corresponding to a front end of the seat. In addition, a reinforcing plate that extends in the width direction of the seat with a substantially angled cross section and forms a closed cross section with the cab floor or the engine cover is fixed, and the reinforcing plate is protruded into a seat cushion of the seat, thereby causing a submarine phenomenon of a seated person. A cab-over type vehicle seat installation structure that prevents the vehicle. 2. The cab according to claim 1, wherein a frame-shaped core material along the outer periphery of the seat cushion is embedded in a lower surface of the seat cushion, and is fixed to the cab floor or the engine cover via the core material. Over-type vehicle seat installation structure.