JPH11165659A - Seat belt fitting structure in cab - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat belt fitting structure in a simple and low-cost vehicle cab which can improve the safety of an occupant by permitting a center seat disposed in the vehicle cab to engage with a three-point seat belt and a center seat head rest, and improve the rigidity of a back panel and the cab. SOLUTION: A center beam 1, which is a reinforcing member, is disposed at the roughly central part in the horizontal direction of the back panel 6 of a cab 5 by fixing its upper end at a cant rail back, its intermediate part at the reinforcement of the back panel 6, and its lower end at a rear mount rail. A three-point seat belt 3 for a center seat is supported by a shoulder anchor 11 and a retractor 13 fixed on the center beam 1 side. A center seat head rest 4 is supported at a support bracket 2 fixed at the center beam 1 so as to be rotatable. It is thus possible to improve the safety of all occupants seated on the seats in the cab 5 using the three-point seat belt and the head rest.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat belt mounting structure for a seat provided in a cab of a vehicle such as a truck, and more particularly to a cab having a three-point seat belt and a center seat headrest provided on a center seat. And a seat belt mounting structure.

[0002]

2. Description of the Related Art As shown in FIG. 11, a driver's seat 28 and a passenger's seat 29 are provided in a cab of a vehicle, and a center seat 15 which does not usually have a headrest is provided between them. Can be On the other hand, each seat is provided with a seat belt engaged with each seat to reduce the amount of movement of the occupant at the time of a vehicle collision or the like. As shown in the figure, the driver's seat 28 and the passenger's seat 29 are provided with three-point seat belts 30 and 31 for stopping the movement of the occupant's shoulder and waist in the event of a collision. A two-point seat belt 32 is provided to stop the movement of the occupant's waist.

[0003]

On the other hand, the prior art also discloses a seat belt mounting structure in which a center seat is provided with a three-point seat belt. JP-A-3-2461
Japanese Patent Publication No. 72 shows an example. This "reinforcement mechanism for a vehicle cab" is fixed to an upper cross member and a floor panel arranged at an intermediate position in the front-rear direction of a roof panel of the cab as shown in FIG. A reinforcement pillar is provided between the lower pillar and the lower cross member, and a shoulder anchor of a three-point seat belt for a center seat is attached to the reinforcement pillar.

[0004] This known technique has a configuration similar to the embodiment of the present invention described in detail later, but differs greatly in the following points. That is, this known technique can be adopted only in a bed-type cab in which a bed is arranged behind the cab and a seat is provided in front of the bed, and it is difficult to apply to a bedless cab.

That is, in the case of a bedless cab, the seat is arranged close to the back panel side of the cab.
For this reason, in the case of a bedless cab, if a reinforcing pillar is provided between the upper cross member and the lower cross member at an intermediate position of the roof panel as in the related art, the reinforcing pillar is disposed in front of the occupant. , Which hinders various operations in the cab of the occupant and impairs safety. Further, when the upper cross member is provided at the rear end of the roof panel of the bedless cab without disposing the upper cross member at the center of the roof panel of the cab, it is difficult to hold both ends of the upper cross member. .
That is, the roof side rails are arranged at the upper part on both sides of the cab, but the roof side rails are not arranged at the rear part of the roof panel. Therefore, in order to fix the upper cross member to the rear portion of the roof panel, it is necessary to provide a special member for fixing the upper cross member on the rear side of the roof panel, which complicates the structure.

Further, in the case of the above-mentioned prior art, a shoulder anchor of a three-point seat belt for a center seat is attached to a reinforcing pillar, and the reinforcing pillar is fixed to an upper cross member and a lower cross member, and the upper cross member and the lower cross member. The cross member is arranged in the width direction of the cab, but the upper cross member and the lower cross member are not used for fixing the seat belt except for the portion where the reinforcing pillar is fixed. In the case of this known technique, an upper cross member and a lower cross member having a complicated structure as shown in the figure are provided only to hold the shoulder anchors of the three-point seat belt of the center seat. However, there is a problem that the structure becomes complicated and the cost increases.

Further, as a known technique for fixing a reinforcing member to a back panel, Japanese Utility Model Laid-Open No. 4-132889 is known. This is shown in FIG.
It is installed between the reinforcement 8a and the side of the carrier mount bracket 10a and has a function of reinforcing the back panel 6a, but does not support a shoulder anchor for a center sheet.

The present invention has been made in view of the above circumstances, and a center seat in a cab can be provided with a three-point seat belt and a headrest for a center seat. An object of the present invention is to provide a seat belt mounting structure capable of reinforcing a cab.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention supports a three-point seat belt, particularly a center seat, of the seats provided in the cab and also reinforces the rear surface of the cab. A seat belt mounting structure, the seat belt mounting structure including a reinforcing member and a support bracket, wherein the reinforcing member has a roof at an upper end, an intermediate portion, and a lower end substantially at a central portion in a left-right direction of a back panel of the cab. A center rail fixed to the cantilever back on the panel side, a reinforcement of the back panel and a rear mounting rail, and holding the shoulder anchor and the retractor of the three-point seat belt; the support bracket is fixed to the reinforcing member; Belt attachment in the cab holding the headrest And it constitutes an elephant. The center seat headrest is disposed above the center seat when in use and is fixed by a catch held by the support bracket, and when not in use, the catch is removed and the headrest is stored in a space on the roof panel side. It is characterized by. Further, the rear mount rail to which the reinforcing member is fixed is reinforced by reinforcement.

The shoulder anchor and the retractor of the three-point seat belt for the center seat are fixed to a reinforcing member fixed to the back panel. Thus, the three-point seat belt for the center seat is attached, and the occupant of the center seat can wear the three-point seat belt. In addition, the center seat headrest is rotatably supported by a support bracket fixed to the reinforcing member, is disposed at a predetermined position when used, and is not obstructed from the rear view when viewed from the back glass when not in use. It is stored in the space. As described above, the three-point seat belt is provided to the occupant of the center seat, and the headrest can also be provided. On the other hand, the upper end, the middle part, and the lower end of the reinforcing member are fixed to the cantilever back, the reinforcement of the back panel, and the rear mount rail, respectively, so that the rigidity of the back panel and the cab can be improved. Then, the back panel can be prevented from shaking, and the occurrence of muffled sound can be prevented. Further, since the rear mount rail supporting the lower end of the reinforcing member is reinforced by the reinforcement, the supporting rigidity of the reinforcing member is improved, and the rigidity of the cab and the back panel can be further improved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a seat belt mounting structure in a cab according to the present invention will be described below in detail with reference to the drawings. As shown in FIG. 3, the center beam 1, which is a reinforcing member having a U-shaped cross section, has a flange 1a integrally formed on the opening side thereof and a back panel 6 of the cab 5 (FIG. 1).
And is disposed substantially at the center of the back panel 6 in the left-right direction (FIG. 1). More specifically, as shown in FIGS. 2 and 3, the center beam 1 has its upper end fixed to the cantilever back 7 on the rear side of the roof panel of the cab 5 and the intermediate portion fixed to the reinforcement 8 of the back panel 6. Then, the lower end is fixed to the rear mount rail 10 and is fixed to the back panel 6 side. The upper side of the center beam 1 is provided with a shoulder anchor 11 of a three-point seat belt.
Mounting holes 12 (FIG. 3) are provided,
At the lower side, a mounting portion 14 (FIG. 3) to which the retractor 13 (FIG. 2) is mounted is formed.

As described above, the flange 1a of the center beam 1 is fixed to the back panel 6 including the reinforcement 8, and the flanges 1b and 1c (FIG. 3) provided at the lower end thereof are respectively attached to the rear mount rail 10. It is fixed. As described above, the back panel 6 is reinforced by the center beam 1 with high strength.

On the other hand, the cab 5 above the center beam 1
As shown in FIGS. 1 to 3, a support bracket 2 having a U-shaped cross section is fixed on the surface facing the indoor side of the vehicle.
The support bracket 2 supports a center seat headrest 4 described later.

As shown in FIGS. 1 and 2, the three-point seat belt 3 for the center seat 15 is provided with a shoulder anchor 11.
, A retractor 13, a buckle 16, a tongue 17, a belt 18, and the like. The belt 18 is installed between the retractor 13, the shoulder anchor 11, the tongue 17, and the fixing portion 19 fixed to the floor panel 9 with a variable belt length. Further, the tongue 17 is engaged with the buckle 16 so as to be able to be inserted and removed. The shoulder anchor 11 has the shape shown in FIGS.
Is fixed to the center beam 1. Although not shown in the drawing, an inner reinforcement is fixed to the portion of the mounting hole 12 in the center beam 1 so as to reinforce the periphery of the mounting hole 12 and increase the rigidity of the mounting portion of the shoulder anchor 11. ing. The retractor 13 is inserted into the center beam 1 from the mounting portion 14 (FIG. 3), and is fixed to the center beam 1 at this position. By inserting the tongue 17 into the buckle 16 and fixing it, the three-point seat belt 3 is in a state of use.

Next, a support structure for the center seat headrest 4 will be described with reference to FIGS. A headrest stay 20 is fixed to the center seat headrest 4. In addition, the headrest stay 20 is the upper stay 2
0a and the lower stay 20b project. The upper stay 20a is pivotally supported on the upper side of the support bracket 2 and is urged by a spring 21 to rotate in a direction in which the headrest 4 is stored. On the other hand, the lower stay 20b is inserted into a concave groove 22 formed below the support bracket 2. The catch 23 holds the lower stay 20b inserted in the groove 22 in the groove 22. The catch 23 has a lower stay 20b.
And a catch body 23a for preventing the lower stay 20b from coming out of the groove 22 of the lower stay 20b, and engaging the rotating shaft 24 of the catch 23 to rotate the catch body 23a in the direction of arrow C (FIG. 5). A spring 25 that urges as much as possible, a stopper 26 that abuts against the bottom surface 2a of the support bracket 2, and an operation unit 23b that rotates the catch body 23a are provided. As shown in FIG.
When 0b is inserted, the stopper 26 hits the bottom surface 2a of the support bracket 2 by the pressing force of the spring 25, and the further rotation of the catch body 23a is restrained. Therefore, the lower stay 20b is held in the concave groove 22.
On the other hand, when the operating portion 23b is moved in the direction of arrow D, the restraint of the stopper 26 is released, the contact between the catch body 23a and the lower stay 20b is released, and the catch 23 comes off from the lower stay 20b, so that the upper stay is removed. The headrest 4 is pivoted in the direction E as shown in FIG. 6 around the center 20a, and is housed in the space 27 (FIGS. 1 and 2) on the cab 5 side which does not interfere as shown in FIG.

FIG. 1 shows the arrangement of the center seat 15, the center seat headrest 4, and the three-point seat belt 3, the driver's seat 28 and the passenger's seat 29 sandwiching the center seat 15, and these three points. Seat belt 30,
It is a front view which shows 31. In addition, each part except the center seat 15 and the center seat headrest 4 is an existing one, and the description thereof will be omitted. Further, in this example, the center beam 1 and the like for the center seat are arranged between the center seat 15 and the passenger seat 29, but depending on the structure of the back panel 6 and the like, the driver seat 28 and the center seat are arranged. 1
It may be between 5. As described above, a three-point seat belt can be attached to each seat, and improvement in safety can be expected.

FIGS. 8 to 10 show the rear mount rail 10.
This shows several examples of the reinforcing structure, and will be described below with reference to FIG. FIG. 8 shows the structure around the rear mount rail 10 at the portion indicated by A in FIG. A rear mount bracket 33 also serving as a reinforcement is fixed to the rear mount rail 10, and a rear underframe 34 fixed to the rear mount bracket 33 is fixed to the underframe 35. The floor panel 9 is mounted and fixed on the under frame 35. With the above structure, the rear mount rail 10 is reinforced and contributes to the rigidity of the back panel 6 and the cab 5.

FIG. 9 shows a reinforcing structure of the rear mount rail 10 at a portion indicated by B in FIG. The rear mount rail 10 in this range corresponds to a portion that stands and holds the center beam 1 as shown in FIG. As shown in FIG. 9, a bent reinforcement 33 a is fixed inside the rear mount rail 10 to reinforce the rear mount rail 10. The floor panel 9 is directly fixed to the rear mount rail 10.

FIG. 10 shows a sectional structure of the rear mount rail 10 shown in FIG. 7C. This portion is located at both ends of the rear mount rail 10, and there is no problem even if the rigidity is low. Therefore, no reinforcement is provided as shown in the figure.

As described above, the rear mount rail 10 is reinforced and supported by changing the reinforcing structure in response to the external force acting on this portion. This prevents cost increase and weight increase by adopting a uniform reinforcing structure, and considers effective reinforcement.

In the above description, the center beam 1 is arranged at the position shown in FIG. 1 and the like, and only one center beam is arranged. However, the arrangement place and the number are not limited to those shown. Also, the cross-sectional shape of the center beam 1 and the like is U-shaped,
It is not limited to this. Further, the reinforcing structure of the rear mount rail 10 is not limited to the illustrated shape, and various reinforcing structures such as a box type and a cross type are employed. Also, the center seat headrest need not be movable.

[0022]

According to the first aspect of the present invention, according to the cab seat belt mounting structure, a reinforcing member is erected substantially at the center of the back panel of the cab in the left-right direction, and a reinforcing member for the center seat is provided on the reinforcing member. By firmly holding the shoulder anchor or the retractor of the three-point seat belt, the occupant of the center seat can also wear the three-point seat belt. In addition, the center bracket headrest is rotatably supported by the support bracket fixed to the reinforcing member, so that the safety of the occupant sitting on the center seat can be improved. Furthermore,
The rigidity of the back panel is improved by the reinforcing member, and as a result, the overall rigidity of the cab can be improved. This also prevents the back panel from swaying and prevents the occurrence of muffled sound. In addition, since the reinforcing member is arranged on the back panel side, the occupant space of the cab is maintained as it is, and does not hinder various operations of the occupant. Further, the reinforcing member has a simple structure and can be implemented at low cost. 2) According to the seat belt mounting structure of the second aspect of the present invention, the center seat headrest is securely held at a predetermined position by the catch when in use, and is stored in the space above the cab when not in use. As a result, the rear view through the back glass is not obstructed when one or two passengers are riding. 3) According to the seat belt mounting structure of the third aspect of the present invention, since the rear mount rail is reinforced by the reinforcement, the support rigidity of the reinforcing member is improved, and the rigidity of the back panel and the cab is improved. I do.

[Brief description of the drawings]

FIG. 1 is a front view showing a center seat provided with a seat belt mounting structure in a cab of the present invention and other seats, and an engagement state of three-point seat belts thereof.

FIG. 2 is an enlarged side sectional view of FIG. 1;

FIG. 3 is a perspective view showing a state in which a reinforcing member of a seat belt mounting structure in the cab of the present invention is mounted on a back panel.

FIG. 4 is a perspective view showing a support structure of a headrest for a center seat in a seatbelt mounting structure in a cab according to the present invention.

FIG. 5 is a side view showing a detailed structure of the catch in FIG. 4;

FIG. 6 is a perspective view showing a state when the center seat headrest in FIG. 4 is not used.

FIG. 7 is a perspective view showing a support structure of a back panel provided with a reinforcing member of a seat belt attachment structure in the cab of the present invention.

FIG. 8 is a partial cross-sectional view showing one embodiment of a reinforcing structure of a rear mount rail.

FIG. 9 is a partial cross-sectional view showing another embodiment of the reinforcing structure of the rear mount rail.

FIG. 10 is a partial cross-sectional view showing the shape of both ends of a rear mount rail.

FIG. 11 is a perspective view showing a structure of a conventional seat belt that engages with a seat in a cab.

FIG. 12 is a side sectional view showing one of the known techniques of a conventional cab back panel reinforcing structure.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Center beam (reinforcement member) 1a Flange section 1b Flange section 1c Flange section 2 Support bracket 2a Bottom surface 3 3-point seat belt 4 Center seat headrest 5 Cab 6 Back panel 7 Cant rail back 8 Reinforcement 9 Floor panel 10 Rear mount rail DESCRIPTION OF SYMBOLS 11 Shoulder anchor 12 Mounting hole 13 Retractor 14 Mounting part 15 Center seat 16 Buckle 17 Tongue 18 Belt 19 Fixed part 20 Headrest stay 20a Upper stay 20b Lower stay 21 Spring 22 Depression groove 23 Catch 23a Catch body 23b Operation part 24 Rotation Shaft 25 Spring 26 Stopper 27 Space 28 Driver seat 29 Passenger seat 30 Three-point seat belt 31 Three-point seat belt 33 Rein Force (rear mount bracket) 33a Reinforcement 34 Rear underframe 35 Underframe

Claims (3)

[Claims] 1. A seat belt mounting structure for supporting a three-point seat belt for a center seat among seats provided in a cab and also for reinforcing a rear surface of the cab, wherein the seat belt mounting structure includes a reinforcing member and a reinforcing member. A support bracket is provided, and the reinforcing member is provided at substantially the center in the left-right direction of the back panel of the cab, with its upper end, middle portion, and lower end respectively attached to the roof panel-side cant rail back, the back panel reinforcement, and the rear mount rail. A seat belt mounting structure for a cab, wherein the support bracket is fixed and holds a shoulder anchor and a retractor of the three-point seat belt, the support bracket is fixed to the reinforcing member, and a headrest for a center seat is held. 2. The center seat headrest is disposed above the center seat when in use and is fixed by a catch held by the support bracket. When not in use, the catch is removed and stored in a space on the roof panel side. The seat belt mounting structure for a cab according to claim 1, wherein 3. The seat belt mounting structure for a cab according to claim 1, wherein the rear mount rail to which the reinforcing member is fixed is reinforced by reinforcement.