JPH0428839Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is based on the following method: After the seat bag is laid down on the seat cushion, the seat cushion is rotated around its front part to a substantially horizontal forward lying position. ,
This invention relates to an automobile seat in which the bottom surface of the seat cushion is substantially flush with the floor surface.

(Prior Art) The seats of a conventional one-box car are explained with reference to Figs. 6 to 9. A is the first seat, b is the second seat.
seat, c is the third seat, _c1 is the seat cushion of the third seat, _c2 is the seat back of the third seat c, and the front lower part of the seat cushion _c1 is attached to the vehicle body side through the axis d. It is attached to the bracket f so that it can rotate forward, and the lower part of the seat back _c2 is attached to the rear part of the seat cushion _c1 via an axis e so that it can rotate forward. In addition, g is a connecting rod, and the connecting rod g is a pin h that pivotally supports the connecting portion of the vehicle body side connecting rod portion g ₁ , the seat side connecting rod portion g ₂ , and the respective connecting rod portions g ₁ and g ₂ . and a pin i which pivots the lower end of the connecting rod part _g1 on the vehicle body side to the bracket f on the vehicle body side.
and a pin j that pivots the upper end of the seat side connecting rod portion _g2 to a frame member (not shown) of the seat cushion _c1 , and is fixed to the connecting end of the vehicle body side connecting rod portion _g1 . It is composed of a stopper k,
Rotate the seat back c ₂ of the third seat c around the axis _e to the solid line position or the broken line position in _{FIG .} The seat cushion c ₁ and the seat back c ₂ are turned upside down by rotating about the axis d from the solid line position in FIG. 6 to the dotted line position.
At this time, the stopper k fixed to the connecting end of the vehicle body side connecting rod part _g1 is brought into contact with the connecting end of the seat side connecting rod part _g2 , and the connecting rod g is made straight, and the seat cushion c By locking seat cushion C ₁ and seat back C ₂ in the above-mentioned inverted position, the floor surface l behind seat cushion C ₁ and seat back C ₂ is released, and this area is used for storing luggage, etc. There is.

(Problems to be Solved by the Invention) In the one-pot car seat shown in FIGS. 6 to 9, the front part of the seat cushion _c1 is
While pivoting to the bracket f on the vehicle body side via
The same seat cushion _c1 is attached to the bracket f on the vehicle body side via the connecting rod g, and the seat cushion _c1 and seat back _c2 are moved forward to the inverted position (the position indicated by the dashed-dotted line in Fig. 6). Even if you can, you will not be able to make it fall any further forward,
There was a problem in that the flat floor formed at the rear of the vehicle was limited to 1, making it impossible to load long or large items.

The above-mentioned problems can be solved by implementing the arrangement as shown in FIGS. 10 to 15. That is, in Fig. 15, 1 is the first seat, 2 is the second seat, 3 is the third seat, 4a is the seat cushion of the third seat 3, 4b is the seat back of the third seat 3, and the seat back 4b is the seat cushion of the third seat 3. It is attached to the seat cushion 4a via a shaft 5 shown in FIGS. 14 and 15 so as to be rotatable forward. Further, 15 in FIG. 14 is a bracket fixed to the frame (not shown) of the seat bag 4b, 16 is a mating member on the side of the seat cushion 4a, 17 is a pawl that engages with the saw teeth of the mating member 16, and 17a is the pawl 17. The pin 20 pivots on the bracket 15, and the claw 1
7 is an arcuate hole, 18 is a reclining operating lever, 21 is a pin for pivotally supporting the operating lever 18 to the bracket 15, and 19 is the operating lever 1.
A pin 19 is fixed to the lower end of the hole 8 and is slidably inserted into the arcuate hole 20. Reference numeral 22 denotes an operating wire. When the operating wire 22 is indexed upward by operating a lock lever (not shown) provided on the seat back 4b, the operating lever 18 rotates to the position indicated by the two-dot chain line, and the movement is caused by the claw 17. As a result, the pawl 17 rotates upward and disengages from the engaging member 16, making it possible for the seat bag 4b to rotate forward. Further, reference numerals 6 in FIGS. 10 and 11 refer to guide rails having an inverted U-shaped cross section fixed to both left and right sides of the seat frame (not shown) of the seat cushion 4a, and 6a provided on both sides of each guide rail 6. Guide grooves 7 are left and right brackets fixed to the floor side of the vehicle body, and the front end of each guide rail 6 is attached to each bracket 7 via a shaft 8 so as to be rotatable forward. Further, reference numeral 9 denotes left and right connecting rods, 10 denotes a shaft for pivotally supporting the lower end of each connecting rod 9 to each bracket 7, and 9a denotes a connecting rod 9 fixed to the upper end of each connecting rod 9 in a T-shape. An upper end 9a of the connecting rod 9 is slidably fitted into guide grooves 6a provided on both sides of the guide rail 6. Further, 11 is a lock lever support piece fixed to the guide rail 6, 12 is a shaft fixed to the lock lever support piece 11, and 13 is a lock lever support piece fixed to the guide rail 6.
is a lock lever rotatably supported by a coaxial shaft 12; 14 is a helical spring; one end 14a of the helical spring 14 engages with a hole 13c provided in the lock lever 13; Part 14
b is engaged with a concave portion 12a provided at the end of the shaft 12, and the lock lever 13 is biased clockwise in FIG. 10 about the shaft 12 by the helical spring 14. Further, 13a is an engagement recess provided in the lock lever 13, 13b is an engagement recess provided in the lock lever 13, 13a is an engagement recess provided in the lock lever 13, and 13b is a perspective view of the lock lever 13.

If the third seat 3 is now in the solid line position (seating position) in FIG _.
(See the solid line position in Fig. 12). From this state, the seat bag 4b is rotated forward about the shaft 5, and the seat bag 4b is laid down on the seat cushion 4a (see the position of the broken line in FIG. 15).
Next, the seat cushion 4a and the seat back 4
When b is rotated forward about the axis 8 and turned upside down in a substantially vertical state (see the position shown by the dashed-dotted line in Fig. 15),
The T-shaped upper end 9a of the connecting rod 9 slides in the guide groove 6a of the guide rail 6 as the seat cushion 4a rotates forward about the axis 8, and comes into contact with the sloped part 13b of the lock lever 13. From,
When the lock lever 13 is rotated counterclockwise against the helical spring 14 and the seat cushion 4a and seat back 4b are inverted, the T-shaped upper end 9a fits into the engagement recess 13a of the lock lever 13. , the seat cushion 4a and the seat bag 4b are locked in the inverted position (see the dot-dash line position in FIG. 12). Also, from this state, the lock lever 13 is rotated counterclockwise against the spiral spring 14 to release the lock between the connecting rod 9 and the lock lever 13, and the seat cushion 4a and the seat back 4b are moved forward about the shaft 8. When the seat cushion 4a and the seat bag 4b are rotated to lie down (see the position indicated by the two-dot chain line in FIG. 15), the T-shaped upper end 9a of the connecting rod 9 engages the shaft 8 of the seat cushion 4a. As the seat cushion 4a and the seat back 4b are rotated forward about the center, they slide in the guide groove _6a2 of the guide rail 6, and when the seat cushion 4a and the seat back 4b are laid down, the T-shaped upper end 9a is attached to the front end _6a2 of the guide groove 6a. When engaged, the seat cushion 4a and the seat bag 4b are locked in the inverted position (see the two-dot chain line position in FIG. 12). At this time, the bottom surface of the seat cushion 4a is flush with the rear floor surface, so a wide flat floor surface is formed behind the second seat 2 (see L in FIG. 15). Further, when the seat cushion 4a is lifted upward from this forward lying position, the seat cushion 4a and the seat bag 4b return to the inverted position shown by the dashed line in FIGS. 12 and 15, and the T-shaped upper end 9a of the connecting rod 9 When the lock lever 13 is engaged with the engagement recess 13a of the lock lever 13 and the lock lever 13 is rotated counterclockwise from this state, the T-shaped upper end 9a of the connecting rod 9 is disengaged from the engagement recess 13a of the lock lever 13, and the seat cushion 4a and the seat back 4b return to the positions shown by the solid lines in FIGS. 12 and 15, allowing the user to take a seat.

In the automobile seat shown in FIGS. 10 to 15, when the seat cushion 4a and the seat back 4b move from the inverted position to the reclined position,
Since it rotates while falling, there is a risk of impact being applied to the vehicle body and seat. Further, when returning from the reclined position to the inverted position, the seat cushion 4a and the seat bag 4b are lifted against their weight, which requires a large operating force.

(Means for Solving the Problems) The present invention addresses the above-mentioned problems, and after the seat bag is laid down on the seat cushion, the seat cushion is moved in a direction approximately horizontally forward, centering on the front part of the seat bag. In a car seat that is rotated to a reclined position so that the bottom surface of the seat cushion is substantially flush with the floor surface, the seat cushion is disposed along the left and right direction in the front part of the seat cushion, and one end of the seat cushion is disposed along the left and right direction. a torsion bar that engages with the frame pipe; a support fitting that supports the other end of the torsion bar on the frame pipe; and a support fitting that supports the other end of the torsion bar on the frame pipe; A part of the front part of the frame pipe is crushed into an oval cross section, a hole is provided therein, and the other end of the torsion bar is engaged with the hole. The present invention relates to an automobile seat characterized in that a spacer is interposed between the other end of the torsion bar and the supporting metal fitting, and the purpose of the spacer is to move the seat cushion and seat back from an inverted position. The impact when moving to the inverted position can be reduced, and the operating force when returning the seat cushion and seat bag from the inverted position can be reduced.
The torsion bar can be easily installed. Another object of the present invention is to provide an automobile seat that can prevent abnormal noise from occurring at the other end of the torsion bar, which has a large torsion angle.

(Function) The automobile seat of the present invention is constructed as described above, and when the seat cushion and seat back are rotated to the inverted position, the other end of the torsion bar comes into contact with the engaging member on the vehicle body side, and from this state When the seat cushion and seat bag are rotated to an inverted position, the torsion bar flexes, and the fall energy of the seat cushion and seat bag is absorbed by the elastic deformation of the torsion bar, so that no impact is applied to the vehicle body or seat. Also, in this state, the elastically deformed torsion bar is pushing the seat cushion and seat back upwards, and by simply lifting the seat cushion lightly,
The seat cushion and seat bag rotate toward the inverted position. Furthermore, when installing a torsion bar, all you have to do is engage one end of the torsion bar with a hole made in a frame pipe with an oval cross section, and then attach the torsion bar to the frame pipe via a support member. easily done. Furthermore, since a spacer is interposed between the other end of the torsion bar and the support fitting, abnormal noise can be prevented from occurring at the other end of the torsion bar, which has a large twist angle.

(Example) Next, the car seats of the present invention are shown in Figs. 1 to 5.
To explain with one embodiment shown in the figure, 4a ₁ is a frame pipe of a seat cushion (see 4a in Figs. 10, 12, and 15), and the frame pipe 4a ₁
The front part 4a ₁ ' is crushed into an oval cross section,
A hole is bored in the oval section 4a ₁ '.
Further, reference numeral 7 denotes left and right vehicle body side brackets, and 30 denotes seat side mounting brackets fixed to the left and right front portions of the seat frame _4a1.The respective seat side mounting brackets 30 are rotated by the respective vehicle body side brackets 7 via shafts 8. The seat cushion 4a is attached to the coaxial 8
It is now possible to fall forward centering on. The lower end of the seat bag (see 4b in FIG. 15) is rotatably attached to the rear of the seat cushion 4a, so that the seat bag 4b can be folded forward. Further, reference numeral 31 denotes a torsion bar disposed in the left-right direction at the front part of the seat frame _4a1 ;
2a and 32b are the seat frames 4a ₁ and 4a ₂
The torsion bar 31 is supported by the support fittings 32a, 32b, and the synthetic resin spacer 39, and the torsion bar 31 is supported by the support fittings 32a, 32b, and the synthetic resin spacer 39.
One end 31a of the frame pipe 4a ₁ is engaged with a hole provided in the oval section 4a ₁ ′ of the frame pipe 4a 1 . Further, 31b is the other end (free end) of the torsion bar 31, 33 is a cover fixed to the vehicle body side bracket 7, and 33a is a long hole provided in the cover 33; The end portion 31b is movably inserted. Also 3
4 is an engagement member that engages with the other end 31a of the torsion bar 31 fixed to the vehicle body side bracket 7;
A collar 36 is fitted onto the engaging member 34 (a collar whose surface is hardened by carbon quenching), and the engaging member 34 is welded 38 to the vehicle body side bracket 7 and is positioned within the cover 33. are doing. Also 37
is an E-ring fitted to the tip of the engaging member 34.

Next, the function of the automobile seat shown in FIGS. 1 to 5 will be explained in detail. Seat bag 4b
After lying down on the seat cushion 4a, when the seat cushion 4a (frame pipe 4a ₁ is rotated around the shaft 8 to an approximately vertical inverted position,
The other end 31b of the torsion bar 31 moves to the position indicated by the dashed-dotted line in FIG. Further, when the seat cushion 4a (frame pipe 4a ₁₎ is rotated from this inverted position to a substantially horizontal inverted position about the shaft 8, the torsion bar 31 is bent and at the same time the other end 31b rotates the collar 36 of the engagement member 34. 5. When the seat cushion 4a and the seat bag 4b rotate from the inverted position to the reclined position in this way, the torsion bar 31 is bent, so that the seat cushion 4a and the seat bag 4b are The falling energy is absorbed by the elastic deformation of the torsion bar 31, so that no impact is applied to the vehicle body or the seat.Also, in this state, the seat cushion 4a and the seat back 4b are urged upward by the elastically deformed torsion bar 31. By simply lifting the seat cushion 4a upward, the seat cushion 4a and the seat back 4b rotate toward the inverted position, reducing the operating force.

In addition, () a hole is made in the foot pipe 4a ₁ with a circular cross section, and one end 31a of the torsion bar 31 is made.
In the case where the torsion bar 31 is engaged, drilling is required, which increases the cost and also makes it difficult to attach the torsion bar 31 because it is difficult to engage the one end 31a of the torsion bar 31. () If the other end of the torsion bar 31 is directly supported by the support fitting 32b, abnormal noise will occur at the other end of the torsion bar 31, which has a large twist angle. ()
The other end 31b of the torsion bar 31 is connected to the engaging member 3
4, there was a problem that the torsion bar 31 and the engaging member 34 would be severely worn.However, in order to solve the above (), the hoom pipe _4a1 was crushed into a circular cross section and a hole was drilled there. The holes can be punched by pressing, reducing costs. In addition, a hole is drilled in the circular cross section,
It is easy to engage one end 31a of the torsion bar 31, and since the torsion bar 31 is supported by the support fittings 32a and 32b which are screwed together, the torsion bar 31 can be easily attached. Also,
Regarding the above (), a synthetic resin spacer 39 is interposed between the other end side of the torsion bar 31 and the support fitting 32b, thereby preventing the generation of abnormal noise. Regarding the above (), the collar 36 is fitted onto the engaging member 34, and since the collar 36 rotates, the torsion bar 31 and the engaging member 34
wear is prevented as much as possible.

(Effect of the invention) In the automobile seat of the present invention, when the seat cushion and seat bag are rotated to the inverted position as described above, the other end of the torsion bar comes into contact with the engaging member on the vehicle body side, and from this state the seat cushion When the seat bag is rotated to the reclining position, the torsion bar is bent, and the falling energy of the seat cushion and seat bag is absorbed by the elastic deformation of the torsion bar, so that no impact is applied to the vehicle body or the seat. In this state, the elastically deformed torsion bar urges the seat cushion and seat bag upward, and by simply lifting the seat cushion lightly, the seat cushion and seat bag rotate toward the inverted position.
In this way, it is possible to reduce the impact when moving the seat cushion and the seat bag from the inverted position to the reclined position, and also to reduce the operating force when returning the seat cushion and the seat bag from the reclined position. In addition, when installing a torsion bar, all you have to do is engage one end of the torsion bar with a hole made in a frame pipe with an oval cross section, and then attach the torsion bar to the frame pipe via a support member. It can be done easily. Also, since a spacer was interposed between the other end of the torsion bar and the above-mentioned support fitting,
This has the effect of preventing abnormal noise from occurring at the other end of the torsion bar, which has a large twist angle.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the automobile seat according to the present invention, FIG. 2 is an enlarged perspective view of the vehicle body side bracket, and FIG. 3 is a perspective view showing the other end side support member of the torsion bar. 4 is a vertical sectional side view taken along the arrow line in FIG. Figure 8 is a side view showing the third seat of the seat, Figure 9 is a side view showing the connecting rod of the seat, Figure 9 is its plan view, and Figure 10 is a view of the seat when it is rotatable to the inverted and reclined positions. 11 is a longitudinal sectional front view taken along the arrow line in FIG. 10, and FIG.
3 is a perspective view of the lock lever, FIG. 14 is a side view showing the locking mechanism of the seat bag, and FIG. 15 is an explanatory view of each position of the seat. 4a... Seat cushion, 4a ₁ ... Frame height of seat cushion 4a, 4a ₁ '... Oval section, 4b... Seat back, 31... Torsion bar, 31a... One end of torsion bar 31, 31b... ...the other end of the torsion bar 31, 32a, 32b...support member, 34...engaging member, 39...spacer.

Claims (1)

[Scope of utility model registration request] A vehicle in which a seat bag is laid down on a seat cushion, and then the seat cushion is rotated around its front part to a substantially horizontal forward lying position, so that the bottom surface of the seat cushion is made substantially flush with the floor surface. a torsion bar disposed along the left-right direction in the front part of the seat cushion, one end of which engages with the frame pipe of the seat cushion; and the other end of the torsion bar supported by the frame pipe. and an engagement member on the vehicle body side that engages with the other end of the torsion bar when the seat cushion and the seat bag are rotated to the forward folded position; A portion was crushed into an oval cross-section, a hole was provided therein, the other end of the torsion bar was engaged with the hole, and a spacer was interposed between the other end of the torsion bar and the support metal fitting. An automobile seat characterized by: