JPH0431185Y2 - - Google Patents

Description

[Detailed Description of the Invention] a. Detailed Industrial Description The present invention relates to a seat belt attachment device for use in automobiles.

b. Prior Art There is a cushion frame that supports the seat cushion of an automobile, which has a structure in which four members are assembled into a frame shape, each forming a rectangular piece. A seat belt retractor or the like is provided below the cushion.

c. Problems to be solved by the invention In contrast to the cushion frame having the above structure, the present inventor has developed a seat belt attachment device having a structurally simple and strong structure. Fig. 5 shows the outline of the system, in which a bridge plate d is fixed integrally across a pair of slide rails b and c provided at the bottom of the seat a, and a seat belt retractor e etc. is attached to this bridge plate. It is designed to be fixed.

Then, the seat belt pulled out from the retractor e is guided by the roller i of the roller bracket g, and is guided to the holding part k provided on the side of the seat a.
A route is taken to reach the driver seated in seat a.

However, the seat belt attachment device having this structure has the following problems. In other words, the seat belt coming out of the retractor e is attached to the slide rail b.
passes through roller i of roller bracket g at the bottom of . At this time, a pressing force is applied to the roller i due to the tension of the seat belt. The direction of this pressing force is the direction of the bisector of the angle formed by the seat belt bent at the roller i. As is clear from the figure, the horizontal distance between roller i and retractor e is longer than the horizontal distance between roller i and the lower end of holding part k, and therefore the direction of the bisector is It will be diagonally to the upper right. Yotsute Roller i
A component force in the horizontal direction acts on the roller bracket g that holds the . Therefore, the supporting part of the roller bracket g needs to be designed in consideration of this horizontal component force, resulting in a time-consuming and complicated structure.

In addition, the seat belt coming out of the retractor e goes diagonally downward and passes through the roller i as shown in the figure, so when a rear seat passenger stretches his or her legs to the bottom of the front seat, it interferes with the seat belt in this area. There was also a fear that this would happen.

The present invention aims to provide a seat belt attachment device that solves these problems.

d Means for Solving the Problems In order to solve the above-mentioned problems, the present invention fixes a bridge plate across a pair of slide rails provided at the bottom of the seat, and attaches a seat belt retractor, etc. to the bridge plate. A seat belt anchorage is provided, and a roller bracket for guiding the seat belt is provided near the end of the bridge plate, and a roller for guiding the seat belt almost horizontally is placed on the bracket, and a roller is placed directly below one slide rail. The seatbelt is provided with a roller that makes the running angles of the seatbelt equal.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In Figures 1 to 4, 1 is a front seat, 2 is a seat frame, and 3 and 4 are slide rails on both left and right sides.
consists of upper rails 3a, 4a fixed to the seat frame 2, and lower rails 3b, 4b fixed to the floor side.

5 is the upper rail 3 of slide rails 3 and 4
It is a bridge plate that is spanned between a and 4a, and both ends are firmly fixed to each upper rail 3a and 4a by means such as welding.

Reference numeral 7 denotes a seatbelt retractor provided below the bridge plate 5, which is fixed by a bolt of a nut 6 welded to the bridge plate 5, and a bolt nut is attached to a bracket 10 extending on the opposite side. 11, it is firmly fixed.

8 is up to the roller bracket, roller 8a,
8c, and the bridge plate 5 is fixed by bolts 8b.
It is fixed near the end of the This roller 8a is arranged on the center line of the slide rail 3, and the roller 8c is arranged so that when the seat belt 9 on the lower side of the bridge plate 5 passes through this roller 8c, it becomes almost horizontal. be. This seat belt 9 is pulled out from the retractor 7, guided by rollers 8c and 8a,
It passes through a holding part 12 provided on the side of the front seat 1 and extends to a position where the passenger can easily operate it.

The roller bracket 8 has a base portion supporting the roller 8a formed along the outer shape of the slide rail 3, and ridges 8g, 8 formed thereon.
h are brought into contact with both lower ends 3g and 3h of the upper rail 3a of the slide rail 3.

In this way, the seat belt 9 guided by the roller 8a of the roller bracket 8 and stretched in front and behind it has the same running angles θ ₁ and θ ₂ with respect to the central axis l on the roller 8a. It is structured as follows.

e Effect When the front seat 1 is moved back and forth, the position of the retractor 7 of the seat belt 9 is also moved back and forth.

Now, when a load is suddenly applied to the seat belt 9, the generated force F is divided into a horizontal component force _F1 and a vertical component force _F2 , as shown in FIG.

Here, remove roller 8c of roller bracket 8.
However, since the seat belts 9 are arranged so as to be almost parallel, the vertical component force F _{2 is extremely small, and therefore the vertical component force F 2} transmitted from the bridge plate 5 to the slide rails 3 and 4 is The load will be small. That is, the force acting in the direction of pulling the retractor 7 off becomes extremely small.

In addition, since the seat belt 9 is stretched forward and backward with the same angle of entry and exit with respect to the roller 8a, the horizontal component force is applied from the roller 8a to its central axis l.
It acts vertically along the direction toward the center of the slide rail 3. In this case, roller bracket 8
Load acts equally on both lower end portions 3g, 3h of the slide rail 3 via the ridge portions 8g, 8h.

f. Effects of the invention As described above, the device according to the invention connects the seatbelt by extending the bridge plate over the slide rail and providing the seatbelt retractor and the specially constructed roller bracket on the bridge plate. The load is applied only in the vertical direction. Therefore, even if a sudden load is applied to the seatbelt, structural measures against the load can be easily taken, and the load can be distributed to the slide rails provided on both sides, making it possible to take special reinforcement measures. I don't have to do it.

In addition, the seat belt under the front seat is installed horizontally close to the front seat, so
Even if you put your feet in, it won't interfere with the seat belt.

[Brief explanation of drawings]

Fig. 1 is an explanatory perspective view of the automobile seat belt attachment device according to the present invention, with the front seat temporarily moved upward, Fig. 2 is an explanatory cross-sectional view of the same, and Fig. 3 is an enlarged explanatory view of the roller bracket. 4 is a plan view of the roller bracket, and FIG. 5 is a cross-sectional explanatory view of a seat belt attachment device to which the present invention is applied. 3, 4...Slide rail, 5...Bridging plate, 7...Retractor, 8...Roller bracket, 9...Seat belt.

Claims (1)

[Scope of utility model registration request] A bridge plate is passed over a pair of slide rails provided at the bottom of the seat and fixed together, a seat belt anchor such as a seat belt retractor is provided on the bridge plate, and a seat belt is attached near the end of the bridge plate. A guiding roller bracket is provided, and the bracket is provided with a roller that guides the seat belt almost horizontally, and a roller that is placed directly below one slide rail to make the running angle of the seat belt equal. Seat belt attachment device.