JPH042451B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a support device for an inner belt in a seat belt device used for a bench seat such as a truck seat or a rear seat of a passenger car.

A bench seat that seats two or three people has seat cushion 3 as shown in Figure 1.
1 and a seat back 32, and the seat cushion 31 constitutes a seat frame by a pair of left and right side plates (not shown), a front lateral member and a rear lateral member that extend over these side plates, and the front lateral A spring is strung between the member and the rear side member, a cushion material made of foamed resin or the like is superimposed on the spring, and an outer skin is sewn in to cover the outer surface.

The seat bag 32 is configured similarly,
This back frame 38 is connected to the side plates of the seat cushion 31 by suitable means. As shown in FIG. 2, the seat frame supporting the seat cushion 31 is supported so as to be movable in the front-rear direction along guide rails 33 provided on the floor 34 of the vehicle body of the side plate 22.

A pair of inner belts 20 (FIG. 1) arranged in the center of the bench seat are equipped with a known buckle 19 at the tip, and as shown in FIG.
The buckle 19 is connected to a known outer belt 30. The base end portion of the inner belt 20 is pulled out rearward through the gap between the rear edge of the seat cushion 31 and the lower edge of the seat bag 32, and is fixed to the floor 34 with an anchor bolt 13.

In the conventional seat belt device described above, the floor 34
When the bench seat is moved back and forth, the effective length of the inner belt 20 changes. For example, if you move forward from the state shown in Figure 2,
While the inner belt 20 is drawn into the inside of the seat cushion 31, it remains slack under the seat cushion 31 when it moves rearward. If the occupant wears the seat belt without being aware of this slack, it is extremely dangerous because the occupant cannot be safely restrained in an emergency.

In addition, when the bench seat is moved rearward, even if the inner belt 20 is not slackened, the connecting part with the outer belt 30 will be located near the center of the occupant (moves from the waist to the abdomen), and the restraint performance of the seat belt will deteriorate. descend.

Furthermore, the bench seat has a seat cushion of 31.
Since the seat back 32 is attached to the vehicle body in a pre-assembled state, in the above configuration, the upper end side of the inner belt 20 fixed to the floor 34 of the vehicle body is connected to the seat cushion 31 after the bench seat is assembled. It takes time to pass it between the seat bag 32 and the seat bag 32.

The object of the present invention is to provide a seat belt that is pre-assembled to the bench seat so that it does not loosen when the bench seat is adjusted to move forward and backward, and that the load of the seat belt in an emergency is not applied to the seat and is received in a straight line by the vehicle body. An object of the present invention is to provide a support device for an inner belt for a bench seat.

In order to achieve the above object, the present invention has a structure in which a bracket having a U-shaped cross section is fixedly supported on a rear transverse member of a seat frame that supports a seat cushion, and a plate is used to connect an inner belt to an upper wall and a lower wall of the bracket. A metal fitting of the shape is slidably supported through the bracket, and a longitudinal guide tube made of a brittle material is inserted into the end wall of the bracket and a hole provided in the metal fitting. It is made by inserting stays, each of which has notches at its edges at intervals in the longitudinal direction, through the guide tube.

To explain the present invention based on an embodiment, as shown in FIG. 2, the seat frame is constructed by connecting a horizontal member 23 to the front end of a pair of left and right side plates 22, and a horizontal member 24 to the rear end thereof. It is the same as the conventional one.

According to the present invention, as shown in FIGS. 3 and 4, a bracket 7 having a U-shaped cross section is provided at the middle portion of the horizontal member 24.
is fixedly supported. The upper wall 7a of this bracket 7
A pair of rectangular holes 14 are provided on the left and right sides, and a corresponding small hole 17 is provided in the lower wall 7c. Furthermore, a pair of rectangular holes 1 on the left and right sides are provided in the end wall 7b.
5 is provided. As shown in FIGS. 4 and 5, a rectangular metal fitting 6 made of a thick plate is passed through each hole 14, and a projecting piece 16 provided at the lower end of the metal fitting 6 is inserted into the hole 1.
7 is inserted and supported. An inner belt 20 made of a known cloth or the like is coupled to the upper end of the metal fitting 6.

As shown in FIG. 5, the metal fitting 6 is provided with an inverted triangular wedge hole 6a, and the bracket 7 is connected to the wedge hole 6a.
A guide tube 26 made of a fragile material such as synthetic resin is inserted into the hole 15 in the end wall. As shown in FIG. 4, a stay 27 is supported inside the guide tube 26 that extends in the longitudinal direction of the vehicle. Stay 27
is made of a thick plate, and the base end is attached to the anchor bolt 1.
Notches 27a and 27b are provided at a predetermined interval in the longitudinal direction on the upper and lower edges of the stay 7, respectively, at the portions fixed to the floor 34 by the stays 3 and inserted into the guide tube 26.

In this way, the bracket 7, the metal fitting 6 that supports the inner belt 20, and the guide tube 26 are assembled in advance to the seat frame of the bench seat. When assembling the vet sheet to the vehicle body, a stay 27 is inserted into the guide tube 26, and the stay 27 is fixed to the floor 34 with the anchor bolt 13.

In an emergency, for example, in the case of a collision or sudden braking, the forward movement of the occupant due to inertia is suppressed by the seat belt device, and the metal fitting 6 is pulled up by the tensile load applied to the inner belt 20, forming an inverted triangular shape. The narrow groove part of the wedge hole 6a forming the guide tube 26
It bites into the lower edge of the stay 27, breaks it, and engages with the notch 27b of the stay 27. At the same time, when the stay 27 is bent upward by the metal fitting 6, the notch 27a bites into the upper edge of the hole 15 of the bracket 7. Such engagement between the metal fitting 6 and the stay 27 suppresses forward movement of the occupant, and the tensile load of the inner belt 20 is transmitted to the stay 27 and received by the vehicle body.

The guide tube 26 serves to smoothly move the metal fitting 6 relative to the stay 27 in adjusting the back and forth movement of the seat frame, and to minimize the gap between the stay 27 and the wedge hole 6a of the metal fitting 6 and the hole 15 of the bracket 7. .

[Effects of the Invention] As described above, the present invention provides a plate that fixes and supports a bracket having a U-shaped cross section on the rear transverse member of a seat frame that supports a seat cushion, and connects an inner belt to the upper and lower walls of the bracket. A shaped metal fitting is slidably supported through the bracket, and a longitudinal guide tube made of a brittle material is inserted into a hole provided in the end wall of the bracket and the metal fitting.
The stay, which has its base end fixed to the vehicle body side and has cutouts on the upper and lower edges at intervals in the longitudinal direction, is inserted into the guide tube, so even if the seat is moved forward and backward, the inner Since the metal fittings supporting the belt move along the guide cylinder together with the bracket, the length of the inner belt does not change at all. Therefore,
The correct connection position with the outer belt can always be obtained,
A proper wearing state can be obtained.

According to the present invention, the end fittings of the inner belt, the brackets that guide and support the fittings, the guide tubes that engage the brackets and the fittings, etc. are pre-assembled in the seat frame of the bench seat, so that it is not necessary to use the seat frame of the bench seat in advance. You can save the trouble of passing the inner belt through the gap between the seat cushion and the seat bag, and
To prevent an inner belt from remaining slack when adjusting the back and forth movement of a bench seat.

In addition, in an emergency, when the inertia load of the occupant is applied to the inner belt, the end fitting of the inner belt moves relative to the bracket and the stay, and the wedge hole of the metal fitting bites into the notch of the stay and is integrally connected.
Since the load of the inner belt is transmitted to the vehicle body through the stay, no unreasonable force is applied to the bench seat.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the general structure of the bench seat, Fig. 2 is a side view showing how the bench seat is attached, and Fig. 3 is an attached state of the bracket that guides the end fitting of the inner belt according to the present invention. FIG. 4 is a side sectional view of the inner belt support device according to the present invention, and FIG. 5 is a front sectional view thereof. 6: Metal fittings, 6a: Wedge hole, 7: Bracket, 1
3: Anchor bolt, 14, 15: Hole, 19: Buckle, 20: Inner belt, 24: Lateral member, 2
6: Guide tube, 27: Stay, 34: Floor.

Claims (1)

[Claims] 1. A bracket having a U-shaped cross section is fixedly supported on the rear horizontal member of the seat frame that supports the seat cushion, and a plate-shaped metal fitting that connects the inner belt is slidably supported through the upper and lower walls of the bracket. A longitudinal guide tube made of a brittle material is inserted into the hole provided in the end wall of the bracket and the metal fitting, and the base end is fixed to the vehicle body side, and a notch is formed on the upper and lower edges at intervals in the longitudinal direction. A support device for an inner belt for a bench seat, which is made by inserting a stay equipped with a guide cylinder into a guide tube.