JPS6325227Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is a vehicle in which the seat bag is folded down onto the seat cushion from the seated state, and then the seat cushion is folded to the side or in front of the seat. The present invention relates to an improvement in a folding device for a folding seat used in a center seat provided in a driver's seat or an auxiliary seat attached to a seat or side wall of a vehicle body.

In the conventional seat folding device, as shown in Fig. 1, the base end 2 is fixed to the folding seat attachment part 1 such as the vehicle body or the seat leg, and the tip 3 is located slightly inward from the side edge 4 of the seat. A seat support member 5 is provided, which is rotatably supported by a pin 6 at a tip 3 of the seat support member 5, and is folded around the tip 3 of the seat support member 5 as a center of rotation. A cushion 7 is provided.

Further, a base portion 8 is provided at the side end 4 of the seat cushion 7.
A base 11 is rotatably supported 12 on a first link 9 which is rotatably supported 13 on a first link 9 and a bracket 10 fixed to the vehicle body, a seat leg or a seat support member 5, and a first link 9 having a spring. Two links 14 are provided, and the tip 15 of the first link 9 and the tip 16 of the second link 14 are pivotally supported 17 so as to be rotatable with respect to each other.

In the figure, reference numeral 18 is a stopper that comes into contact with the seat support member 5 when the seat cushion 7 is folded, and 19 is a stopper that the second link 14 comes into contact with when the seat cushion 7 is in the seated state.

In the conventional seat folding device configured as described above, when the seat is folded and stored from the seated state, the seat bag (not shown) is first folded down onto the seat cushion 7, and then the seat cushion is folded down. 7 to the tip 3 of the seat support member 5
Rotate it in an inverted direction around the center.

At this time, the base portion 8 of the first link 9 which is pivotally supported 13 on the side end 4 of the seat cushion 7 rotates and moves downward from the tip 3 of the seat support member 5, and the base portion 8 of the first link 9 is rotated. The pivot support 17 of the second link 14 moves downward to the side, and the imaginary line b connecting the pivot support 17 of the first link 9 and the second link 14 and the tip 3 of the seat support member 5 and the first It is configured to cross the dead point a where the trajectory c of the base 8 of the link 9 intersects.

Note that when changing from the retracted state to the seated state, the reverse operation is performed.

However, in this conventional sheet folding device, it is not possible to extremely increase the spring force provided on the second link 14, so the holding force of the sheet is determined by the ratio of the first link 9 and the second link 14. As a result, the first link 9 becomes large, and not only does it require a large rotation space for the first link 9, but also when the seat is stored, a seat supporting member is attached to the side of the seat. Since the number 5 protrudes, there are problems such as narrowing of passage space inside the vehicle interior.

In addition, since there are many shaft supports such as links and a large number of parts, it must be assembled with high precision to prevent looseness, making the assembly work difficult, requiring a large number of man-hours, and being expensive. There are also problems such as becoming.

Therefore, in view of the above-mentioned conventional problems, the present invention has been developed.
This invention was developed to solve this problem, and for this purpose, the present invention provides a folding device for the seat that includes a base end of the seat support member and a holding member disposed outside and below the tip of the seat support member. It is fixed to the vehicle body, the leg of the seat, etc., and the inner side of the end of the seat cushion is rotatably supported by a pin or the like at the tip of the seat support member, and a check link is inserted through the holding member. and both sides of the check link are slidably and pivotably pivoted about the guide center between the check link hooks by the check link hooks provided on the holding member, Further, a base end of the check link is rotatably supported near an end of the seat cushion, and the base end of the check link is centered at the center of the guide when the seat cushion is in a seatable state. and the front end of the seat support member, and is arranged so as to move inward from the line segment when the seat cushion is in an inverted state. When the seat cushion is in an inverted state, the seat cushion is prevented from rolling to the seatable state, and when the seat cushion is forcibly rotated to the seatable state side or the inverted state side, the seat cushion passes through the check link latching portion. A possible second stop is formed, and
The initial objective is achieved by forming a third stopper on the check link or the lower surface of the seat cushion to stop the seat cushion in the inverted position when the seat cushion is rotated in the inverted direction. This is what I did.

The present invention will be described below with reference to the drawings, using an example in which the present invention is implemented in a center seat provided between a driver's seat and a passenger's seat of a cab-over type automobile.

A seat support member 21, which has a width in the front-back direction of the seat and is provided wide, is fixed to the driver's seat floor surface 22, and the seat support member 21 extends upward from the base end 21a and further curves diagonally outward and upward. The distal end 21b is located at a position slightly inside the seat from the seat cushion side end 23, and is formed in a substantially dogleg shape. A bracket 25 fixed to a seat cushion frame (not shown) is provided on the lower surface 24 of the seat cushion.Both ends 25a and 25b of the bracket 25 are bent downward and a hole 27 is bored through which a pin 26 passes. The bracket 25 and the tip 2 of the seat support member 21
1b is rotatably supported by a pin 26. Furthermore, a check link 2 protruding downward is located closer to the seat cushion side end 23 than the tip 21b of the seat support member 21 of the bracket 25.
Eight attachment protrusions 29 are provided.

A check link 2 is attached to the mounting protrusion 29.
The base end 28a of the check link 28 is rotatably supported by a pin 30, and the distal end 28b of the check link 28 is attached to a space in a mounting bracket 32 of a check link holding member 31, which is a holding member fixed to the driver's seat floor surface 22. 32a extends through the check link holding member 31, and at its tip 28b, the outer end 31 of the check link holding member 31 is attached when the seat is stored, that is, when the seat cushion is rotated in an inverted direction.
A third stopper 33 is fixed by a rivet 34, which abuts the seat cushion 38 and stops the seat cushion 38 in the inverted position.

Incidentally, the third stopper 33 also serves to prevent the check link 28 from coming off.

The mounting bracket 32 of the check link holding member 31 is superimposed on the seat support member 21 so as to reinforce the seat support member 21, and is provided with the above-mentioned cavity 32a. The portion of the mounting bracket 32 in which the cavity 32a is bored has a substantially trapezoidal shape, and the check link holding member 31 is fixed inside the cavity 32a. On the inside of the check link holding member 31, an elastic body 35 made of a rubber material and a check link hooking portion 36 that comes into contact with the check link 28 are provided.

The elastic body 36 is provided with a hole 35a for forming a relief portion during compression. or,
The check link latching portion 36 is formed into a frame shape of nylon or other resin, and has a convex portion 3 inside thereof.
6a is formed.

The base end 28a and the distal end 2 of the check link 28
A first stopper 28c that holds the seat cushion 38 in the seated state and a second stopper 28d that suppresses the seat cushion 38 from rolling to the seatable state when the seat cushion 38 is in the inverted state are provided between the seats 8b and 8b. It is being The first stopper 28c is formed in a substantially diamond shape, and is configured to be able to engage and detach from the check link latching portion 38 when the seat cushion 38 is forcibly rotated toward the seatable state or the inverted state. . Further, a second stopper 28d is located below the first stopper 28c, and the second stopper 28d is located below the first stopper 28c.
The check link latching portion 38 is formed in a substantially rhombic shape similarly to c, and when the seat cushion 38 is forcibly rotated to the seatable state side or the inverted possible state side.
is made to be able to pass through. 31b is a hole through which the check link 28 passes.

In this embodiment, the elastic body 35 is provided to impart elastic force to the check link holding member 31, but spring steel or the like may be used to impart elastic force to the check link 28 side.

Next, the operation of the folding device of the present invention will be explained based on FIG.

In the seated state, the seat cushion 38 is set substantially horizontally, and the upper surface of the seat cushion 38 is also formed substantially horizontally so that the user can sit on the seat. At this time, the check link 28 is at the position indicated by the solid line, and the first stopper 28c formed in the middle of the check link 28 is located above the check link hook 36, so that the check link 28 is positioned above the convex portion of the check link hook 36. 36
The seat cushion 38 is held in the seated state by coming into contact with the upper surface of the seat cushion 38a.

When the seat back 37 is tilted forward from the seated state and the seat cushion 38 is inverted clockwise to the side (outward), the seat cushion 38 rotates in the inverted direction around the tip 21b of the seat support member 21. do. At this time, check link 28
The pivot point B of the base end 28a of the seat support member 21
The intersection point between the virtual center line (line segment) connecting the hinge center A of the distal end 21b and the guide center C of the check link latching portion 36 and the locus B-B' along which the pivot point B of the base end 28a of the check link 28 moves. D and moves toward the seat support member 21 side. That is, the check link 28 moves from the seated state to the base end 28a.
The shaft fulcrum B moves so as to be inserted in the direction of the check link holding member 31 until the point D where the shaft fulcrum B crosses the imaginary center line (line segment) connecting the hinge center A and the guide center C of the check link retaining member 36, and the hinge center When it crosses the imaginary center line (line segment) connecting A and the guide center C of the check link hook 36, it moves in the direction of the seat support member 21.

Therefore, the first stopper 28c is located at the pivot point B.
Check the link latching portion 36 until it reaches the intersection D.
When the pivot point B crosses the intersection D, the check link 28 moves in the direction of engagement, and when the pivot point B crosses the intersection D, moves in the direction of disengagement. An on-over action is performed using the virtual center line (line segment) as a boundary.

When the seat cushion 38 is further rotated,
The second stopper 28d of the check link 28 passes through the convex portion 36a of the check link latching portion 36 from below to the top and moves.
At the same time, the third stopper 33 provided at the tip 28b of the check link 28 comes into contact with the outer end 31a of the check link holding member 31, and the seat is in an inverted state, that is, stored. maintained in the state.

When changing the seat from the stowed state to the seated state, the operation is reversed.

The third stopper 33 prevents the seat from further rotating from the stored state and also prevents the check link 28 from coming off.
It is not necessary to provide the bracket 25 on the lower surface of the seat cushion as shown in FIG.
Additionally, a stopper piece 39 may be provided that comes into contact with the seat support member 21 when the seat cushion is inverted, and this may be used as a third stopper.

In the above embodiment, the first stopper 28c is provided in the middle of the check link 28 to hold the seat cushion 38 in the seated state, but this is not limited to this. As shown in FIG. 8, when the seat cushion is in the seated state, a bumper rubber 40 is provided on the driver's seat floor surface 22 opposite the tip 28b of the check link 28, and the bumper rubber 4
When the seat cushion is in a seated state, the tip 2 of the check link 28 is
8b may be brought into contact with the bumper rubber 40 to maintain the seated state.

Reference numerals 41a and 41b shown in FIG. 3 are fourth stoppers that also serve as legs provided on the lower surface of the seat cushion 38 on the temporary opposite side where the check link 28 and the like are provided. stopper 41
a and 41b are in contact with the floor surface of the vehicle body when the seat is in the seated state to prevent the seat from further rotating from the seated state.

Incidentally, instead of the fourth stoppers 41a and 41b, a hook is provided on the floor or side wall of the vehicle body such as the driver's seat, or on the leg of the seat, and the hook is hung on a check link or a seat cushion frame. You can.

As described above, according to the present invention, the base end of the seat support member and the holding member disposed outside and below the tip of the seat support member are fixed to the vehicle body, the leg of the seat, etc., and the seat support The inner side of the end of the seat cushion is rotatably supported by a pin or the like at the tip of the member, and a check link is inserted through the holding member, and a check link latching portion provided on the holding member is inserted into the holding member. As a result, both sides of the check link are slidable and swingable about the center of the guide between the check link hooks, and furthermore, the base end of the check link is aligned with the end of the seat cushion. is rotatably pivoted towards the part, and
The base end of the check link is located outside the line segment connecting the center of the guide and the tip of the seat support member when the seat cushion is in a seating ready state, and is located outside the line segment when the seat cushion is in an inverted state. It is arranged to move more inward, and
The check link is provided with at least a mechanism that suppresses the seat cushion from rolling toward the seating possible state when the seat cushion is in the inverted state, and when the seat cushion is forcibly rotated toward the seating available state or the inverted state. , a second stopper is formed that can pass through the check link latching portion, and a third stopper is formed on the lower surface of the check link or the seat cushion to stop the seat cushion in the inverted position when the seat cushion is rotated in the inverted direction. Since the structure is such that a stopper is formed, it is only necessary to use one check link, and the number of parts can be reduced. Therefore, the structure is simplified, the number of assembly steps is reduced, and it is possible to provide a device that is not only easy to assemble but also inexpensive.

Furthermore, according to the present invention, the operating space for the check link can be reduced, so the entire device can be made compact.

Further, according to the present invention, since the check link is resiliently held by the check link holding member, it is possible to reduce rattling noise during running.

[Brief explanation of the drawing]

FIG. 1 is a front view of the main parts of a conventional vehicle seat folding device, FIG. 2 is a perspective view of the vehicle seat folding device according to the present invention placed in the driver's seat, and FIG. FIG. 4 is an enlarged perspective view of essential parts of the vehicle seat folding device according to the present invention; FIG. 5 is a perspective view of the check link; and FIG. 6 is a view taken along the - line in FIG. 7 is an enlarged side view showing the operating state of the vehicle seat folding device according to the present invention, and FIG. 8 is an enlarged side view showing another embodiment of the present invention. 21 is a seat support member, 28 is a check link, 28c is a first stopper, 28d is a second stopper, 31 is a check link holding member, 33 is a third stopper, 39 is a stopper piece, and 40 is a bumper rubber.

Claims (1)

[Claims for Utility Model Registration] A base end of a seat support member and a holding member disposed outside and below the front end of the seat support member are fixed to a vehicle body, a seat leg, etc., and the front end of the seat support member is fixed to a vehicle body, a seat leg, etc. The inner side of the end of the seat cushion is rotatably supported by a pin or the like, and a check link is inserted through the holding member, and the check link latching portion provided on the holding member allows the seat cushion to be rotated. Both sides of the link are slidable and swingable about the center of the guide between the check link hooks, and further, the base end of the check link is moved toward the end of the seat cushion. rotatably supported,
The base end of the check link is located outside the line segment connecting the center of the guide and the tip of the seat support member when the seat cushion is in the seatable state, and is located outside the line segment connecting the guide center and the tip of the seat support member when the seat cushion is in the inverted state. The check link is arranged to move inward from the line segment, and the check link at least suppresses the seat cushion from rolling to a seatingable state when the seat cushion is in an inverted state, and also prevents the seat cushion from rolling to a seatingable state. A second stopper is formed that can pass through the check link latching portion when the seat cushion is forcibly rotated toward the possible state or the inverted state. A folding device for a vehicle seat, characterized in that a third stopper is formed to stop the folding device in an inverted position when the device is rotated in an inverted direction.