JPS59216750A - Load supporting structure for seat belt - Google Patents

Abstract

PURPOSE:To simplify the load supporting structure of seat belt by transmitting the tensile load from the seat belt to the floor upon emergency. CONSTITUTION:A seat (S) is mounted slidably back and fro on a lower rail 13 provided on the upper face of a rotary board 5 through an upper rail 12 at the lower section while made rotatable against a fixed board 3 at the floor side through the rotary board 5. Hooks 28 are provided at four corners of the fixed board 3 while two hooks 25 are provided from the rotary board 5 at the seat side to the lower section at the back of the seat (S). Said hooks 28 and 25 are placed on a circle having center same with the center of rotation of the rotary board 5., They will never interfere but upon application of strong emergency force onto the seat belt 16, the seat will incline to engage the hook 25 with a stopper 28 to transmit the force to the floor side.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seat-held load-bearing structure, and more particularly, to a seat-mounted structure in which the direction of the seat can be changed between forward and rearward by incorporating a turntable. In an automobile seat, etc., which is mounted on a base body so that its position can be changed in the longitudinal direction of the vehicle body using a sliding mechanism, the tensile load that acts on the seat held when the seat is not seated is applied to the members constituting the turntable, etc. The present invention relates to a seat-held load-bearing structure in which the seat attachment is supported by an inherently robust member, such as a base or floor member, without burdening the seat.

When using a rotating type seat, when the sort held is used as a seat held, the enormous tensile load that would be applied to the seat held in an emergency will be transmitted to a part of the seat anchor of the floor member via the base of the seat that incorporates a turntable, etc. be done. Therefore, the structure of the three sliding portions of the turntable needs to be sufficiently robust to withstand the enormous moment caused by the inertia of the occupant and the seat itself in an emergency. In this way, it is important to make the base body, especially the turntable structure, so that it has a strength that far exceeds the strength required to withstand normal running vibrations and the weight of the occupants. =J
This results in not only a significant increase in the material and manufacturing costs for the base body, but also a significant increase in the number of vehicles.

In the general car seat of Tsutomi, the seat can be slid only in the front and back direction with respect to the base body.
The seat attachment transmits the enormous load of the seat held in an emergency to the base body, and the seat attachment to the base body aims to reduce the weight of the structure and at the same time ensure the safety of the occupants who get off in the event of an emergency. The thing is
It has existed for a long time (for example, see Japanese Utility Model Application Publication No. 41-77624). However, this is a design for a case where the seat can only move in the front-back direction, and it goes without saying that it cannot be directly applied to a rotary seat where the direction of the seat can be changed by 180 degrees.

The present invention was devised in view of the above-mentioned circumstances, and its purpose is to attach the seat to the base, when the seat held of a rotary seat is attached to the seat as described in Section 2.
In particular, without unnecessarily weakening the strength of the turntable mechanism, the tension of the seat held in an emergency is effectively transmitted to inherently strong members such as the floor member, which would lead to increased costs and weight. It is an object of the present invention to provide a load bearing structure for a seat-held device that can ensure the safety of an occupant without causing any damage.

In order to achieve such an objective, the present invention takes the following technical measures.

That is, a suitable number of hooks are fixed to the upper surface of the cartwheel of the turntable mechanism such that one hook is located on the circumference having the same center as the rotation center of the turntable mechanism, and , a fixing plate or sheet of the turntable mechanism is provided with a hook located on the base body so as to be partially held by the engaging portion of the hook.

In the event of a lightning strike, the hook is not engaged with the hook, but is simply positioned so that a portion thereof is held by the engagement portion of the hook, and the hook and the hook are not engaged with each other. Since the stops are separated and do not interfere with each other, the rotary plate of the turntable mechanism can rotate with respect to the fixed plate without any problem, and the direction of the sheet can be changed.

On the other hand, in an emergency, if the turntable mechanism is damaged due to a huge moment caused by the inertia of the occupants and the seat, and the rotary plate is torn off from the fixed plate and tries to lift up, the fixed plate or the seat In the attachment, the hook, which is positioned so as to hold the hook attached to the base body, hooks the hook. Due to the mutual engagement of the hook and the latching device at this time, the moment is supported by the inherently strong member of the seat 1 through the base body. This allows you to: ! I! The fact that the employee is thrown out with the seat] is 6 (l: really avoided.Moreover,
The present invention has an extremely simple structure in which hooks and latches are attached to the rotary plate and fixed plate of the turntable, so of course it does not cause an increase in cost.
The increase in the amount of vehicle bundles is also extremely small.

Preferred embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a partially sectional side view showing a rotary automobile rear seat to which a seat belt load bearing structure is applied as a first embodiment of the present invention.

The seat S in the figure is for personal use and is for the floor member F.
The seat mounting base 1 is rotatably mounted via a turntable mechanism 2 on a seat mounting base 1 fixed to the seat mounting base 1 .

In the turntable mechanism, a circular plate 4 is attached to a horizontal fixing plate 3 on the upper surface of the base 1, and this circular plate 4 is attached to the seat.
The circular plate 4 is placed in the center of the rotary plate 5 formed to have approximately the same thickness.
A hole 6 of approximately the same size as the one shown in FIG.

That is, the circular plate 4 functions as a shaft for rotatably supporting the rotating plate 5. Further, on the upper surface of the circular plate 4, a presser slope 7 having an outer diameter larger than this is hammered 1 with a forging head 8 to prevent the rotary plate 4 from inadvertently detaching from the circular plate 4 serving as a rotating shaft. I have to.

A seat S is mounted on the upper surface of the rotary plate 5, and a slide mechanism 9
In some cases, the position can be changed in the longitudinal direction of the vehicle body through the In this embodiment, this slide mechanism 9 is
An upper rail 1 extends from the bottom of the seat cushion frame 10 in the front and rear directions via a suitable support piece 11.
At the same time, a lower rail 13 which also extends in the front-rear direction is attached to the upper surface of the rotary plate 5, and these upper rails 12 and lower rails 13 are slid relative to each other by 0J.
It is configured by engaging the function. Furthermore, both the upper rail 12 and the lower rail 13 are formed into an arched shape with their intermediate portions bulging upward.

This is done so that when the seat 1-3 moves from the rearmost end of the slide mechanism 9 to the frontmost end as shown in FIG. When the seat S is moved to the frontmost position and the seat hack 15 is fully reclined in this way, a wide flat bed is created that is continuous with the seat surface of another seat (not shown) placed further behind the seat S. This is to ensure that a surface is formed.

Details of an example of the fixing structure of the seat held 16 to the seat S are shown in FIGS. 2 and 3121! This is not shown.

Rear wall 10a of seat cushion frame 10
In addition, several arms 17 extending downward in a generally doglegged shape are provided at their upper ends so as to be rotatable with a certain resistance. As clearly shown in Figure 3, arm 17
A bolt 19 serving as a support shaft to be screwed onto the seat cushion frame 10 is inserted into the hole 18 provided at the upper end, and a bolt 19 is inserted between the head 19a of the bolt 19 and the outer wall 10a of the seat cushion frame 10. The arm 17 is supported together with a suitable friction material 20,
A predetermined resistance is applied to the rotation of the arm 17. The base end of the seat belt 16 is attached to the lower end of the arm 17 by, for example, fixing an anchor plate 21 with a screw. Note that the resistance given to the rotation of the arm 17 is determined so that the arm will not rotate with a force comparable to the tensile force applied to the seat heald 16 during normal use of the seat belt.

As shown in FIG. 3, at the lower end of the arm 17, the seatbelt 16 is attached to the upper surface of the rotary plate 5 at the fixed position and the approximately resting position.
In cooperation with the hook 22 to be described later, the rotating plate 5 absorbs a strong tensile force applied to the seat bell 1-16 in an emergency.
A pin 23 for transmitting the information is fixed.

On the other hand, at a position on the upper surface of the rotary plate 5 that substantially corresponds to the planar position of the arm 17, the arm 17 is positioned only when the arm 7 is rotated against rotational resistance, that is, only in an emergency. A hook 22 is fixed, which has a hook 24 into which a pin 23 fixed to the end of the hook 24 can be hooked. This hook 22 has its base end fixed to the upper surface of the rotary plate 5, and extends upwardly so as to bypass the pin 23 of the arm 17 from behind. ;1 above the movement locus of the pin 23, and on the arcuate locus of the pin 23 when the arm 17 rotates, the engaging portion 24 that can be engaged with the pin 23 is formed; . Therefore, the forward movement J of the pin 23 under normal conditions is performed without any problem. On the other hand, when the arm 17 is rotated in the direction of the arrow P in FIG. 2 due to a strong tensile force acting on the seat belt 16 in the broken state shown in FIG. 2, as shown by the imaginary line in FIG. The pin 23 engages with the engaging portion 24 of the hook 22, and the strong tensile force exerted by the seat belt 16 is substantially transmitted to the rotary plate 5 rather than to the seat itself.

As is clear when considering the above with regard to Figure 1, if no consideration is given to the base 1 when installing the seat, then
The fixed plate 3, circular plate 4, rotating plate 5,
Also, it is extremely doubtful whether the turntable mechanism 2 made up of the presser plate 7 can withstand the damage reliably. if,
If the turntable mechanism 2 is damaged or destroyed, the occupant will be thrown forward or backward along with the seat. In this case, in order to ensure the safety of the occupants, it is conceivable to make the turntable mechanism 2 extremely robust. However, this would inevitably result in a significant increase in monthly fee costs and vehicle weight, making it impossible to implement in practice.

In the present invention, such a problem can be solved by using the turntable mechanism 2.
Rather than modifying the problem, we have solved the problem at low cost by adding an extremely energy-saving configuration. Next, embodiments of the technical means of the present invention will be described.

1, 4, 5 and 6 show a first embodiment of the technical means of the invention.

A suitable number of hooks 25 are fixed to the lower surface of the rotary plate 5 such that their engaging portions 26 are located on the circumference of a circle whose center is the same as the center of rotation of the rotary plate 5. In the illustrated example, the hooks 25 are fixed at two positions on the left and right sides of the rotary plate 5 at positions located rearward with respect to the orientation of the seat S. This hook 25 is also formed into a plate shape with a constant thickness and has a U-shaped hook gIS 26 at the bottom. As described above, this engaging part 26 is located on the circumference of a virtual circle whose center is the same as the rotation center of the rotary plate 5, and therefore, the engaging part 26 of the two hooks 25 passes through the space 27 of the engaging part 26 at the same time. However, there is a circle having the same center as the center of the rotating plate.

On the other hand, when mounting the seat, a part of the base is attached to the hook 2.
A generally annular hook 28 positioned so as to be held by the hook 26 of the turntable mechanism 5 is attached to the fixed plate 3 of the turntable mechanism 2 via a thin plate-shaped bracket 29. As shown in FIG. 4, these latches 28 are attached to the fixed plate 3, two each on the rear side and the front side, for a total of four hooks. This means that even if the seat S rotates and its direction is changed to the rear, the hook 2 of the rotating plate 5
This is to ensure that I<x acts with the latch 28 on the front side of the fixing plate 3.

FIG. 6 shows details of the relationship between the hook 25 and the hook 28. As shown in this figure, the lateral projected shape of the hook 28 substantially matches the shape of the space 27 of the engaging portion 26 of the hook 25, so that the hook 25 and the hook 28 are
They are designed not to interfere with each other in the circumferential direction of the same circle as the center of rotation &5. Therefore, despite the presence of such hooks 25 and latches 28, the rotary plate 5 is capable of rotational movement relative to the fixed plate 3 under normal conditions.

One end of a strip 30 strong against tensile force is also fixed to the j1 stopper 28, and the other 6H of this strip 3°:
For example, as shown in FIG. 5, + is fixed to a support ring 32 that is firmly fixed by a seat anchor bolt 31.

As is clear from FIG. 1, in this embodiment, a heddle used as a seat heddle is used as the strip 30, and this heddle is positioned so as to run along the side of the base body, and This is covered with a garnish 33 to improve the aesthetic appearance.

In the above configuration, for example, if an emergency situation such as a collision occurs, the inertia force that causes the occupant to jump forward,
When a strong tensile force is applied to the seat belt 16, the arm I7 is rotated in the direction of arrow P in FIG. Then, a tremendous force is applied to the rotary plate 5 to forcibly peel it off in the direction of the arrow in FIG. When the turntable mechanism 2 succumbs to this force and the rear part of the rotary plate 5 begins to be lifted upward, the engaging portion 26 of the hook 25 on the lower surface of the rotary plate 5 pulls up the hook 28 of the fixed plate 3. Let's take a look at this. When this iJl stopper 28 is further pulled upward, tension is applied to the strip 3o that connects this latch 28 and the support ring 32, and the rotating plate 5
Otherwise, the latch 28 is moved upward until the strip 30 is taut! 1JjL.

It stops. This prevents the occupant on the seat from being thrown forward any further. At this time, the seat is attached to the turntable mechanism 2 of the base 1 and the strip body 30.
The garnish 33 is destroyed, but the safety of the passengers is maintained.

FIG. 7 shows a second embodiment of the technical means of the present invention. In the first embodiment described above, a strip 30 connects the hook 28 attached to the fixing &3 and the support ring 32 fixed by the seat anchor bolt 31, so that the seat bell l- 16 is configured so that a portion of the seat anchor ultimately supports the enormous tensile force applied to the seat anchor.
In this embodiment, the proximal end of the hook 28 is fixed to an appropriate portion of the base 1, and the tensile force is supported by the base 1, which inherently has high rigidity. Even in this case, the force that tries to peel off the rotary plate 5 from the fixed plate 3 when the seat is not loaded is absorbed by the hook 25 and the hook 28, the seat attachment is supported by the base, and the occupant is forced to move forward. Being thrown out is effectively prevented.

It goes without saying that the scope of the invention is not limited to the embodiments shown in the drawings.

In short, in a rotary automobile seat, the present invention is designed to support the force exerted by the occupant and the seat due to their inertia when not in use, instead of supporting only the turntable mechanism. This means that it is supported through a hook that is separately interposed between the plates, etc., and a stopper that can be engaged with the hook. Therefore, the hook 25 to be fixed to one surface of the rotary plate and the fixing plate or sheet are attached regardless of the shape and number of the hooks 28 to be attached to the base body. With hook 25! , 4) Stop 28
It is only necessary that the rotating plates do not interfere with each other when rotating, and that they fit together when the hook 25 is pulled up.

Further, as the strip 30 used in the first embodiment, a wire or the like may be used in addition to a heald-shaped strip.

As described above, the present invention has a very simple configuration, and
It has the excellent advantage of being able to ensure the safety of the occupants during periods of low demand, and not causing a significant increase in cost or weight.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, FIG. 1 is a partially sectional side view showing the first embodiment, and FIG. 2 shows an example of the fixing structure of the base end B1 rod of the seat belt. An enlarged side view, FIG. 3 is a cross-sectional view taken along the line 1it-1 in FIG. 2, FIG. 4 is a view taken along the line IV-IV in FIG. 1, and FIG. V
The line ktJi plane view in Figure 6 is the ■-Vl line 11J in Figure 4.
The i-plane view and FIG. 7 are enlarged views of main parts showing a second embodiment of the present invention. l... Seat mounting base, 2... Turntable mechanism, 3... Identification 1 and 5, rotating plate,
25... Fu Tsuk, 26... Engagement part,
28...JJf, +h tool, S...Sheet applicant Daihatsu Motor Co., Ltd.

Claims (1)

[Claims] (11) In a rotary car seat with a seat held, an appropriate number of hooks are attached to the bottom surface of the rotary plate of the turntable mechanism, and the engaging portion thereof is a circle having the same center as the rotation center of the turntable mechanism. At the same time, the fixing plate or seat of the turntable mechanism is fixed to the base body so that it does not interfere with the hook in the circumferential direction of the circle, but when the hook moves upward, it A load-bearing structure for a seatbelt, characterized in that a 1↑) tie is attached to the hooking portion.