JP4946575B2 - Tumble seat hinge mechanism - Google Patents

Description

  The present invention relates to a seat hinge mechanism that enables a seat cushion to be stowed from a collapsed state and stowed.

  A first hinge member fixed to the vehicle floor supports the other end of the second hinge member, one end of which is fixed to the front end of the seat cushion, rotatably by a hinge shaft in a fall direction and an upright direction, a spring, etc. The urging means is mounted on the hinge shaft to give the second hinge member a turning behavior in the upright direction, and the engagement between the latch that fixes the rear end side of the seat cushion to the floor and the striker is released. Various so-called tumble seats have been proposed in which the seat cushion is automatically raised and stored. For example, patent document 1 is mentioned as the example.

JP 2001-63418 A

  In general, when a seat is attached to the floor of a vehicle, it is preferable to carry the seat while carrying the seat in a state where the seat can be seated and confirming the mounting position. In order to apply an urging force in the standing direction to automatically raise the entire seat in the passenger compartment, the spring force is strongly set and the seat hinge is fixed to the first hinge fixed to the floor. The second hinge is opened and has a structure for holding the standing state. For this reason, when the first hinge member is attached to the floor, the seat cushion holds the standing state, so that the hinge mounting portion is located in the shadow of the standing seat cushion, or the seat can be seated (the direction of falling) It is difficult to confirm the mounting position of the seat in a state where the hinge is rotated, and the hinge mounting work becomes complicated. In other words, the seat is temporarily attached in the standing state of the seat cushion, the standing seat cushion is pushed against the spring force in the tilting direction, the latch on the rear end side of the seat cushion and the striker are engaged, and a bolt or the like The fastening part of the hinge will eventually fix the hinge mounting part to the floor, but if the seat is seatable and the mounting position is not appropriate, the latch and striker must be released again and adjusted. Will come out. In particular, when the hinge mounting part, the latch and the striker disengagement operation part are separated from each other, when an individual worker installs the seat in the vehicle interior, the worker releases the hinge mounting part, the latch and the striker from disengagement. The operation part must be reciprocated, and workability is reduced. It is an object of the present invention to provide a hinge mechanism with good tumble seat attachment workability.

In order to achieve the above object, according to a first aspect of the present invention, there is provided a metal first hinge member fixed to a vehicle floor, one end fixed to the seat cushion, and the other end seated on the first hinge member by a hinge shaft. In a tumble seat hinge mechanism comprising a metal second hinge member rotatably supported in a standing direction and a falling direction of a cushion, and a biasing means for biasing the second hinge member in the standing direction. A mounting portion on which one of the first hinge member and the second hinge member is mounted with a stopper member that holds the second hinge member in the direction in which the seat cushion is tilted against the urging force of the urging means; to the other of the first hinge member and second hinge member includes a locking portion for locking the stopper member, the stopper member is made of metal the pin member inserted into the insertion hole formed in the mounting portion Has a flange portion if an annular magnet on the outer peripheral surface with a contacting hole of the pin member, the pin member, along with being inserted into the insertion hole when mounting the seat cushion to the vehicle floor, the seat cushion After the attachment, the hook is detached from the insertion hole , and the flange portion is attracted to one of the first hinge member and the second hinge member when the pin member is inserted into the insertion hole .

  According to the present invention, since the stopper member is mounted on the mounting portion when the seat cushion is mounted on the floor of the vehicle, the seat member can be carried into the vehicle compartment in a state where the seat can be seated and the seat mounting operation can be performed while checking the mounting position. It is possible to improve the mounting workability. Further, since the stopper member is detached from the mounting portion after the seat cushion is attached, it is not necessary to leave the stopper member in the vehicle when the vehicle is completed, and the material cost and the vehicle weight can be reduced.

  According to the present invention, since the stopper member is composed of the pin member, the seat member workability can be improved without using a special tool when the pin member becomes unnecessary and is detached during the seat attachment operation. At the same time, the pin member can be used repeatedly.

  According to the present invention, since the pin member has a flange portion that comes into contact with the edge of the insertion hole, the pin member is prevented from falling through the insertion hole during insertion, and the seat cushion does not stand up accidentally. Installation workability can be further improved. Further, loss due to inadvertent dropping of the pin can be prevented.

  According to the present invention, since at least one of the first and second hinges is made of metal and the magnet is attached to the stopper member, the stopper member is detached when the seat is carried into the vehicle compartment, and the seat cushion is not prepared. Therefore, the mounting workability can be further improved, and loss due to inadvertent dropping of the pins can be prevented.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a tumble sheet 1 “hereinafter simply referred to as“ sheet 1 ”” which is an example of a sheet to which the tumble sheet hinge mechanism according to the present invention is applied. The seat 1 includes a seat cushion 3 on which an occupant sits, and a seat back 2 whose angle is adjustable with respect to the seat cushion 3 by a known reclining mechanism or the like. This seat 1 is provided on the front end side 3A of the seat cushion 3, and is a locking means comprising a hinge portion 4 to which the hinge mechanism of this embodiment is applied, and a known latch and striker provided on the rear end side 3B of the seat cushion 3. 5 is attached to the floor 6 of the vehicle. In FIG. 1, a state indicated by a two-dot chain line indicates a state in which the seat cushion 3 is erected, and a state indicated by a solid line indicates a state in which the seat cushion 3 is tilted.

  The hinge mechanism includes a first hinge member 40 (hereinafter referred to as “hinge 40”) fixed to the floor 6, one end 42A fixed to the front end side 3A of the seat cushion 3, and the other end 42B connected to the hinge 40 as a hinge shaft. The hinge part 4 comprised by the 2nd hinge member 42 (henceforth "hinge 42") rotatably supported by 43, the torsion coil spring 44 used as an urging means, and the bolt member used as a stopper member 45.

  The hinge 40 is made of a metal having a U-shaped cross section as shown in FIGS. 2 and 3, extends in the vehicle front-rear direction, and its front end 40 </ b> A is bent toward the floor 6. The bent front end 40A and rear end 40B are formed with holes 46A and 46B that are attachment portions to the floor 6, and are fixed to the floor 6 through bolts 47 and 47 that are fastening members. It is fixed to the floor 6 by fastening to the nut portions 48A and 48B.

  At the front end 40A, both ends of the engagement pin 49 are fixed and horizontally mounted on side surfaces 40C and 40D which are located in the vehicle width direction and face each other. A hinge shaft 43 spans the side surfaces 40C and 40D and is fixed to the hinge 40 positioned above the engagement pin 49. The hinge shaft 43 and the engagement pin 49 are provided in parallel to each other. In this embodiment, the hole 46A serving as the attachment portion is in a position overlapping with the sheet 1 when the sheet 1 is in an upright state indicated by a two-dot chain line in FIG. When the seat 1 is in a collapsed state shown by a solid line in FIG. 1, the hole 46B serving as the attachment portion is in a position where the seat cushion 3 covers the upper portion, and becomes a shadow of the cushion.

  2 and 3, the hinge 42 is made of a metal having a gate shape in cross section, and the side surface has a fan shape. The other end 42 </ b> B of the hinge 42 is disposed in the side surfaces 40 </ b> C and 40 </ b> D of the hinge 40 so as to face each other and be positioned in the vehicle width direction, and the hinge shaft 43 is inserted therethrough. An upper surface 42E of one end 42A of the hinge 42 is joined to the seat cushion 3, and a hole 46C serving as an attachment portion is formed. The hinge 42 is fixed to the seat cushion 3 by inserting a bolt 47 into the hole 46C and fastening to the nut portion 48C fixed to the seat cushion 3. That is, the hinge 42 is supported by the hinge shaft 43 so as to be rotatable in the standing direction and the falling direction of the seat cushion 3.

  The torsion coil spring 44 is wound around the outer periphery of the hinge shaft 43, and one end 44 </ b> A abuts and engages with the engagement pin 49 from the vehicle rear side, and the other end 44 </ b> B is fixed to the hinge 42. That is, the torsion coil spring 44 urges the hinge 42 in the standing direction to give the seat cushion 3 a turning behavior in the standing direction.

  An insertion hole 50 (mounting portion) into which a bolt member 45 (stopper member) is inserted and a bolt member 45 (stopper member) are located at a position positioned in the standing direction of the hinge 42 relative to the fixing portion of the other end 44B of the torsion coil spring 44. ) Is formed. The insertion hole 50 is formed in the side surface 40C of the hinge 40, and is a hole for loosely fitting the screw portion 45A of the bolt member 45, and the locking portion 51 is formed in the side surface 42C of the hinge 42, and the hinge 42 is in a state of being turned down. The screw hole overlaps with the locking portion 50. The bolt member 45 inserts the screw part 45A into the insertion hole 50, and tightens the screw part 45A into a locking part (screw hole) 51 arranged inside the hinge, thereby integrating the hinge 40 and the hinge 42 together. Thus, the movement of the hinge 42 in the standing direction is restricted, and the hinge 42 is held in a face down state.

  The hinge mechanism 4 having such a configuration is assembled to the seat 1 outside the passenger compartment. At the time of the assembly, the bolt member 45 is attached to the insertion hole 50 and is engaged with the engagement portion 51, and the seat cushion 3 is collapsed. The state, that is, the hinge 42 and the hinge 40 are closed.

  When the seat 1 is assembled in the vehicle interior, the seat cushion 3 is introduced into the vehicle interior in a state where the seat cushion 3 is tilted, and is placed on the floor 6 which is an attachment position. In this state, the hole 46B serving as the attachment portion is covered with the seat cushion 3 from above as shown in FIG. 2, and the hole 46A serving as the attachment portion is opened.

  Then, a bolt 47 is inserted into the hole 46A, and tightened with a tool (not shown) from the front side of the vehicle to the nut portion 48A of the floor 6 to fix the front end of the seat 1 to the floor 6, and the seat cushion 3 is in a state where the seat cushion 3 is tilted. Check. Next, the seat cushion 3 held in the collapsed state is erected, and the bolt member 45 shown in FIG. 3 is removed with a tool (not shown) in order to expose the hole 46 </ b> B serving as the attachment portion in the vehicle interior. At this time, since the urging force of the torsion coil spring 44 in the standing direction acts on the bolt member 45, the resistance when rotating the bolt member 45 in the loosening direction is large. However, in this embodiment, since the insertion hole (hole of the hinge 40) 50 is loosely fitted to the screw portion 45A of the bolt member 45, the bolt member 45 is pushed by pushing the rear end portion 3B of the seat cushion 3 downward. Resistance to is reduced. In this state, it is not necessary to fix the seat 1 to the floor 6 by the locking means 5, and when the bolt member 45 is removed, the seat cushion 3 is automatically raised as shown in FIG. 2 by the action of the torsion coil spring 44. When the rotation is restricted, as shown in FIG. 4, it is held in an upright state.

  When the seat cushion 3 is in the upright state, the hole 46B is exposed to the vehicle interior, so the operator fastens the bolt 47 to the nut portion 48B of the floor 6 from above. By such an operation, the hinge mechanism 4 is fixed to the floor 4. Then, the seat cushion 3 in the standing state is returned to the collapsed state, and the rear end side 3 </ b> B of the seat cushion 3 is fixed to the floor 6 with the lock means 5, whereby the seat 1 mounting operation is completed.

According to such a hinge mechanism 4, the hinge 40 is rotatably supported by the hinge shaft 43 in the standing direction and the falling direction of the seat cushion 3 with respect to the hinge 40 fixed to the floor 6, and biased in the standing direction by the torsion coil spring 44. Since the hinge 42 is held in a tilting direction against the biasing force of the torsion coil spring 44 by the bolt member 45 serving as a stopper member, the seat can be seated when the seat 1 is assembled to the floor 6. Thus, it is possible to carry out the seat mounting operation while carrying in the vehicle compartment and confirming the mounting position, and the mounting workability can be improved. Further, since the bolt member 45 is detached from the mounting portion after the seat cushion is attached, it is not necessary to leave the bolt member 45 in the vehicle when the vehicle is completed, and the material cost and the vehicle weight can be reduced. Further, since the stopper member is constituted by the bolt member 45, when the seat 1 is carried into the vehicle compartment, the stopper member is not detached and the seat cushion 3 does not stand up carelessly, so that the mounting workability can be further improved. it can.
( Reference example )
As shown in FIG. 5, in this reference example , the bolt member 45 used as a stopper member is a pin member 55, and a locking portion formed by a screw hole formed on the side surface 42 </ b> C of the hinge 42 is an insertion hole formed in the hinge 40. 50 is a locking portion 51A having the same hole as that of 50. Since the urging force by the torsion coil spring 44 is large, the pin member 55 uses a metal pin in order to ensure the strength and make it reusable.

When the stopper member is the pin member 55 as described above, the pin member 55 can be removed without using a special tool when the seat 1 is assembled and removed, thereby improving the mounting workability. it can. In addition, since it is not necessary to form a screw hole, it is possible to propose the number of work steps when manufacturing the hinge mechanism .
6, as shown in FIG. 7, the magnet 60 is attached to the pin member 55. The magnet 60 has an annular shape with a hole 60A at the center thereof, and the pin member 55 is inserted into the hole 60A so as to be coaxially mounted on the pin member 55 to form a flange. The pin member 55 is inserted into the insertion hole. 50 and the locking portion 51A are prevented from falling off. Further, a well-known washer 61 and push nut 62 are attached to the pin member 55, thereby preventing the magnet 60 from coming off and preventing the magnet 60 from being damaged due to contact between the magnet 60 and the push nut 62. Note that the push nut 62 is not mounted on the insertion hole 50 of the pin member 55 and the insertion end 55A side to the locking portion 51A, but is mounted on the other end 55B side that the operator holds by hand. This prescribes the insertion amount of the pin member 55 when the pin member 55 is inserted into the insertion hole 50 and the locking portion 51A, and prevents the magnet 60 from being detached due to insufficient insertion or excessive insertion of the pin member 55. It is.

  According to such a configuration, the magnet 60, the washer 61, and the push nut 62 are mounted on the pin member 55 in advance as shown in FIG. 7, and the insertion hole 50 and the locking member are assembled when the hinge mechanism 4 is assembled outside the vehicle compartment. By inserting it into the portion 51A, the magnet 60 is attracted to the side surface 40C of the hinge 40 located outside by a magnetic force to fix the pin member 55. Therefore, when the seat 1 is carried into the vehicle interior, the pin member 55 does not come off and the seat cushion 3 does not stand up unintentionally, so that the mounting workability can be improved and the pin member 55 is not prepared. Loss due to dropping off can be prevented.

  In this embodiment, it is needless to say that a material capable of attracting the magnet 0 is used for the hinge 40 facing the magnet 60. It is also possible to increase the attracting area by transmitting the magnetic force of the magnet 60 using a magnetic material for the pin member 55. However, since it is assumed that the attractive force becomes too strong due to an increase in the attractive area and the pin member 55 cannot be easily removed. In such a case, the pin member 55 is made of a non-magnetic material, and the magnet 60 and the hinge 40 Only adsorption with the side surface 40C may be sufficient.

It is a figure which shows the movement form of the sheet | seat provided with the hinge mechanism which concerns on this invention. Is an enlarged side view showing the configuration of a hinge mechanism according to the implementation embodiments of the present invention. It is sectional drawing of the hinge mechanism which concerns on this embodiment. It is an enlarged side view which shows the structure of the hinge mechanism which concerns on this embodiment.

It is an enlarged side view which shows the structure of the hinge mechanism which concerns on the reference example of this invention. It is an enlarged side view which shows the structure of the hinge mechanism which concerns on this embodiment. It is an expanded sectional view showing the holding state of the 1st and 2nd hinge by the pin member and magnet in this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tumble seat 3 Seat cushion 4 Hinge mechanism 6 Floor 40 1st hinge member 42 2nd hinge member 42A One end 42B Other end 43 Hinge shaft 44 Energizing means 45 Stopper member (bolt member)
50 Insertion hole 51A Locking part 55 Stopper member (pin member)
60 Magnet

Claims (1)

A metal first hinge member fixed to a vehicle floor and one end fixed to the seat cushion, and the other end of the first hinge member can be freely rotated in a standing direction and a falling direction of the seat cushion by a hinge shaft. In a tumble seat hinge mechanism comprising a supported metal second hinge member and a biasing means for biasing the second hinge member in the upright direction,
One of the first hinge member and the second hinge member is provided with a stopper member that holds the second hinge member in the direction in which the seat cushion is tilted against the urging force of the urging means. A mounting portion to be
The other of the first hinge member and the second hinge member is provided with a locking portion for locking to the stopper member,
The stopper member has a metal pin member that is inserted into an insertion hole formed in the mounting portion, and a flange portion that is formed of an annular magnet having a hole that comes into contact with the outer peripheral surface of the pin member. ,
Said pin member, when mounting the seat cushion to the floor of the vehicle, while being inserted into the insertion hole, after the mounting of the pre-Symbol seat cushion is detached from the insertion hole,
2. The tumble seat hinge mechanism according to claim 1, wherein when the pin member is inserted into the insertion hole, the flange portion is attracted to one of the first hinge member and the second hinge member .

Images