JP2991035B2 - Seat belt anchor structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat belt anchor used for a cab-over type vehicle.

[0002]

2. Description of the Related Art In a cab-over type vehicle in which a driver's seat is located above an engine, a cab constituting a driver's cab is provided on a body frame via an elastic body or a bracket. A seat belt anchor is fixed to a floor panel constituting a part of the cab by a fastening member such as a bolt.

[0003]

According to such a structure of the seat belt anchor, when the driver is pulled in the traveling direction of the vehicle due to sudden braking or the like, an excessive load is applied to the seat belt anchor. Simply fastening to the floor panel may cause a problem in mounting strength.

[0004]

Therefore, according to the present invention, a seat belt anchor provided inside a cab constituting a driver's cab, a body mount bracket provided on the cab, and a body mount bracket are supported. The cab mount bracket provided on the vehicle body frame, the cargo box mount bracket provided on the vehicle body frame, and the body mount bracket are attached to the cab mount bracket and the cargo box mount bracket so as to extend between the cab mount bracket and the cargo box mount bracket. Stopper bracket and
A pin attached to the cab mount bracket and penetrating the extended end of the stopper bracket, the stopper bracket is restricted from moving in the front-rear direction by the cab mount bracket and the packing box mount bracket, and is vertically moved by the pin. It is characterized in that it is provided so as to be restricted from moving to. The invention according to claim 2 is characterized in that the body mount bracket is attached to the cab mount bracket via an elastic body.
The invention according to claim 3 is characterized in that the packing box mounting bracket is provided behind the cab mounting bracket, and the stopper bracket is arranged with a space at least between the cab mounting bracket and the packing box mounting bracket.

[0005]

According to the first aspect of the present invention, when a load is applied to the seat belt anchor provided inside the cab, the load is applied to the body mount bracket provided on the cab, the cab mount bracket provided on the vehicle body frame, and It is distributed to the stopper bracket attached to the body mount bracket. In addition, the stopper bracket is restricted from moving in the vertical direction by a pin attached to a cab mount bracket penetrating the extension end. According to the second aspect of the invention, since the body mount bracket is supported by the cab mount bracket via the elastic body, vibration transmitted from the vehicle body frame to the cab is absorbed by the elastic body. According to the invention described in claim 3, when a load is applied to the seat belt anchor,
The entire cab is displaced in the load direction, and the stopper bracket attached to the body mount bracket first contacts the cab mount bracket fixed to the vehicle body frame. If the displacement of the cab cannot be supported by this contact, the stopper member rotates around the end of the contact portion between the cab mount bracket and the stopper bracket,
The extension contacts the packing box mounting bracket.

[0006]

An embodiment of the present invention will be described below with reference to the drawings. 1 and 2, a seat belt anchor indicated by reference numeral 1 is attached to a body frame 2 extending in the front-rear direction of the vehicle body.
It is provided in the inside 3A of the cab 3 supported via the body mount bracket 4 and the cab mount bracket 5. The cab mount bracket 5 is firmly fixed to the vehicle body frame 2 by welding or the like, and a cargo box mount bracket 7 that supports the cargo box 6 is fixed to the vehicle body frame 2 located behind the cab mount bracket 5. A stopper bracket 8 is arranged between the cab mount bracket 5 and the cargo box mount bracket 7.

The body mount bracket 4 is formed in a U-shaped cross section. A rubber material as an elastic body is provided between the bottom 4b and the upper surface 5a of the cab mount bracket 5, and on the upper inner surface 5b of the cab mount bracket 5. 11
A and 11B are fixedly interposed by bolts 12 and nuts 13 and are displaceably supported by the cab mount bracket 5. In general, natural rubber (NR), styrene-butadiene rubber (SBR), butyl rubber (IIR), and chloroprene rubber (CR) are used as the rubber materials 11A and 11B.
When durability is particularly considered, urethane rubber or the like is used.

On the back surface 4a of the body mount bracket 4, a stopper bracket having a U-shaped cross section extending from the body mount bracket 4 to the cab mount bracket 5 and the cargo box mount bracket 7 has a U-shaped side surface. A base end 8a of the base 8 is fixed with a bolt 9 and a nut 10 over substantially the front surface. Above the body mount bracket 4, one side 3Ba of a floor panel 3B as a vehicle body panel constituting a part of the cab 3, and one side 15a of a bracket 15 joined to the floor panel 3 to constitute a closed section. , The base end 8a of each stopper bracket
It is fixed by the uppermost bolt 9 and nut 10 so as to be sandwiched between the rear face 4a of the body mount bracket. The seat belt anchor 1 is
B and the bracket 15 are bolted together.

The extension end 8b of the stopper bracket 8
The space W is arranged in a space 14 formed between the back surface 5c of the cab mount bracket 5 and the front surface 7a of the cargo box mount bracket 7, and a space W is formed between the back surface 5c and the bottom surface 8c of the stopper bracket. Between the end face 8d and the front face 7a of the stopper bracket located at
Are formed respectively. An opening 8e is formed in the bottom surface 8c, and is fixed to the cab mount bracket 5 in the opening 8e.
A guide pin 16 extending in the direction in which the guide pin extends extends loosely. Further, in the vicinity of the end face 8d, a contact plate 1 which comes into contact with the front face 7a when the body mount bracket 4 is displaced.
7 is fixed.

The packing box mount bracket 7 has a hollow prism shape, and is firmly fixed to the vehicle body frame 2 by welding or the like. On the upper part 7b of the packing box mounting bracket 7,
A support leg 6b provided on the bottom 6a of the packing box 6 is fixed.

According to the structure of the seat belt anchor 1 configured as described above, when a load in the direction f is applied to the seat belt anchor 1 due to sudden braking or the like, the load is applied to the body via the floor bracket 3B and the bracket 15. Since the load is distributed to the mount bracket and the stopper bracket 8, the load applied to the anchor attachment portion is reduced.

Further, the body mount bracket 4 is attached to the cab mount bracket 5 via rubber materials 11A and 11B.
Since but that is supported, at the time of sudden braking, the body mount bracket 4, as shown in FIG. 3, it is displaced toward the vehicle front of the arrow F from the position indicated by the two-dot chain line (a first displacement). Then, the stopper bracket 8 fixed to the body mount bracket 4 is integrally displaced from the position indicated by the two-dot chain line to the position indicated by the solid line, and the bottom surface 8c contacts the rear surface 5c of the cab mount bracket. The load f applied to the seat belt anchor 1 is also buffered by the contact between the cab mount bracket 5 and the stopper bracket 8.

If the load f is large and cannot be buffered even by the contact between the cab mount bracket 5 and the stopper bracket 8, as shown in FIG.
, The body mount bracket 4 is displaced in the direction of arrow a from the contact position indicated by the two-dot chain line position (second displacement). Then, the extension end 8 of the stopper bracket
b moves toward the packing box mount bracket 7, the contact plate 17 contacts the front surface 7a, and the rotation of the body mount bracket 4 in the direction of arrow a is restricted. Front 7 at this time
a, the load box mount bracket 7 is firmly fixed to the body frame 2 and the load box 6
, The stopper bracket 8 can be firmly received. Therefore, the load f applied to the seat belt anchor 1 is ultimately received by the contact between the stopper bracket 8 and the load box mounting bracket 7, so that the mounting strength of the seat belt anchor 1 is improved.

Also, the cab 3 tends to move upward due to vibration or the like, or the fastening portion between the body mount bracket 4 and the cab mount bracket 5 is loosened due to vibration or the aging of the rubber materials 11A and 11B. However, since the guide pins 16 are loosely inserted through the openings 8e, the cab 3 including the body mount bracket 4 can be prevented from moving in the vertical direction.

Further, vibration transmitted to the cab 3 from the body frame 2 or a drive system (not shown) is buffered by the rubber materials 11A and 11B interposed between the body mount bracket 4 and the cab mount bracket 5. Since the extended end 8b of the stopper bracket 8 is normally separated from the cab mount bracket 5 and the packing box mount bracket 7, as shown in FIG. Therefore, the buffering action of the rubber materials 11A and 11B is not hindered.

[0016]

According to the first aspect of the present invention, since the load applied to the seat belt anchor is distributed to the body mount bracket, the stopper bracket, and the like, the mounting strength of the seat belt anchor is increased. In addition, the vertical movement of the stopper bracket is regulated by pins attached to the cab mount bracket provided on the vehicle body frame, so that the body mount bracket provided on the cab can be restricted from moving vertically. The mounting strength of the body mount bracket to the bracket can be increased. Claim 2,
According to the invention described in (3), the vibration transmitted from the vehicle body frame to the cab can be absorbed by the elastic body, so that the riding comfort is improved, and an excessive load is applied to the cab or the seat belt anchor, and the body mount bracket moves to the load side. Even so, the stopper bracket abuts on the cab mount bracket and the cargo box mount bracket to prevent the movement thereof, so that the load applied to the seat belt anchor can be reduced, leading to improvement in safety.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing one embodiment of a seat belt anchor structure of the present invention.

FIG. 2 is a side sectional view showing a configuration of a seat belt anchor structure.

FIG. 3 is a side cross-sectional view showing a first displacement state of a stopper bracket and a body mount bracket.

FIG. 4 is a side cross-sectional view showing a second displacement state of the stopper bracket and the body mount bracket.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat belt anchor 2 Body frame 3 Cab 3B Body panel 4 Body mount bracket 5 Cab mount bracket 7 Packing box mount bracket 8 Stopper bracket 8b Extension end 11A, 11B Elastic body (rubber material) 16 pin W, W 'interval

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-25085 (JP, A) JP-A-57-144134 (JP, A) JP 6-1036 (JP, U) JP 1 109465 (JP, U) JP-A 2-96274 (JP, U) JP-A 53-67216 (JP, U) JP-A 59-116250 (JP, U) (58) Fields surveyed (Int. Cl. ⁶ , DB name) B62D 25/08 B62D 33/06 B60R 22/22

Claims (3)

(57) [Claims] 1. A seat belt anchor provided inside a cab forming a cab, a body mount bracket provided on the cab, a cab mount bracket provided on a vehicle body frame for supporting the body mount bracket, A cargo box mount bracket provided on the vehicle body frame; a stopper bracket attached to the body mount bracket and extending so as to be interposed between the cab mount bracket and the cargo box mount bracket; and the cab mount. A pin that is attached to the bracket and penetrates an extended end of the stopper bracket. The stopper bracket is restricted from moving in the front-rear direction by the cab mount bracket and the packing box mount bracket, and is fixed by the pin. Vertical direction Seat belt anchor structure, characterized in that provided movement to be restricted. 2. The seat belt anchor structure according to claim 1, wherein said body mount bracket is attached to said cab mount bracket via an elastic body. 3. The packing box mounting bracket is provided behind the cab mounting bracket, and the stopper bracket is arranged at least with a space between the cab mounting bracket and the packing box mounting bracket. The seat belt anchor structure according to claim 1 or 2, wherein: