JP2007186160A - Hinge mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hinge mechanism capable of enhancing the safety by preventing breakage of a fixed portion to a floor in advance even in case of the direct collision with a test block. <P>SOLUTION: The hinge mechanism 4 supports a seatback 2 provided in front of a luggage compartment R of a vehicle in a longitudinally tiltable manner with respect to a floor panel 3, and includes a portion erecting above a floor panel 3a in the luggage compartment R while being fixed onto the floor panel 3. A bracket 8 for supporting the seatback 2 in a longitudinally tiltable manner is provided, and a hole 14 penetrating the erecting portion in the right-to-left direction is formed in the bracket 8. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle seat that can improve safety.

  In general, a vehicle seat includes a seat back and a hinge mechanism that supports the seat back so as to be tiltable back and forth with respect to the floor of the vehicle.

  In recent years, in order to improve the safety of automobiles in particular, a test block (300 mm long × 300 mm wide cube) placed on the floor of the luggage compartment on the seat back arranged in front of the luggage compartment, When a weight of 18 kg) is collided from the rear, it is a necessary requirement that the amount of forward movement (deformation) of the seat back upper end is equal to or less than a specified value (for example, automobile regulations ECE No. 17). ).

As one of the countermeasures, the hinge mechanism is broken by an external force indirectly applied through the seat back when the test block collides, and the seat back cannot be tilted. There is known one (for example, Patent Document 1) in which the amount of movement is suppressed.
JP-A-11-157371

  By the way, in recent years, the floor of the cargo compartment may be set relatively low from the viewpoint of securing a wider space. In this case, the hinge mechanism provided in front of the cargo compartment is more than the floor of the cargo compartment. May also stand up.

  In such a configuration, when the test block collides with the seat back, the test block may directly collide with the hinge mechanism.

  Here, when the hinge mechanism of Patent Document 1 is adopted, when the test block collides with the seat back, the hinge mechanism is destroyed and the forward movement of the seat back can be effectively suppressed. When the work block directly collides with the hinge mechanism, the fixed portion between the hinge mechanism and the floor may be damaged.

  The present invention has been made in view of the above problems, and even when a test block collides directly, it is possible to prevent damage to the fixed portion with the floor and improve safety. The object is to provide a hinge mechanism.

  In order to solve the above problems, the present invention provides a hinge mechanism that supports a seat back provided in front of a cargo compartment of a vehicle so as to be tiltable back and forth with respect to the floor, and is fixed on the floor. Including a portion that rises above the floor in the cargo compartment, and includes a support member that supports the seat back so as to be tiltable back and forth, and the support member is formed with a hole penetrating the rising portion in the left-right direction. A hinge mechanism is provided.

  The invention according to claim 2 is characterized in that, in a state where the support member is fixed on the floor, the hole is formed at a rear position of the support member.

  According to a third aspect of the present invention, in the state where the support member is fixed on the floor, a bending strength in the front-rear direction of the edge portion is given to a front edge portion of the edge portions of the support member surrounding the hole. The reinforcing means for improving is provided.

  According to a fourth aspect of the present invention, in the support member, at least a part of the rising portion is formed in a plate shape, and the reinforcing means is configured to bend the plate-like portion in the front-rear direction of the edge portion. It is characterized by improving the bending strength.

  According to the present invention, by forming the hole penetrating in the left-right direction, the support member can be divided forward and backward in the range where the hole is formed, so compared with a configuration in which this hole is not formed. The force for deforming the support member in the front-rear direction can be reduced.

  And since the hole is formed in a portion that rises above the floor in the cargo compartment, when the test block collides with the seat back from the rear, the test block collides with the rising portion. Even if it exists, as a result of the impact being absorbed by the support member being deformed, the impact transmitted to the fixed portion with the floor among the impact received by the support member from the test block can be reduced.

  Therefore, according to the present invention, even when the test block directly collides, it is possible to prevent the portion fixed to the floor from being damaged, so that safety can be further improved.

  According to the second aspect of the present invention, among the edges of the support member surrounding the hole, the edge on the rear side of the hole can be easily deformed at the time of collision of the test block by reducing the front-rear width dimension. On the other hand, as for the front edge of the hole, it is possible to prevent the entire support member from tilting forward by increasing the front-rear width dimension and making it difficult to deform when the test block collides. .

  Therefore, according to this configuration, at the time of the collision of the test block, it is possible to effectively absorb the shock due to the deformation of the rear edge, and to suppress the tilting of the entire support member, thereby suppressing the seat back. The supporting state can be maintained.

  According to the invention of claim 3, since the bending strength of the front edge of the support member can be improved, shock absorption due to deformation of the rear edge is performed at the time of collision of the test block. However, it is possible to suppress the front edge from being deformed and to prevent the entire support member from tilting forward.

  Therefore, according to this configuration, at the time of the collision of the test block, it is possible to effectively absorb the shock due to the deformation of the rear edge, and to suppress the tilting of the entire support member, thereby suppressing the seat back. The supporting state can be maintained.

  According to the invention which concerns on Claim 4, a supporting member can be reinforced by simple means of bending a plate-shaped part.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view showing an overall configuration of a rear seat according to an embodiment of the present invention. FIG. 2 is a side view of the rear seat of FIG.

  Referring to the drawings, a rear seat (vehicle seat) 1 is configured such that a seat back 2 disposed in front of a luggage compartment R of the vehicle and the seat back 2 can be tilted back and forth with respect to a floor panel (floor) 3. A hinge mechanism 4 to be supported and a seat cushion 5 provided in front of the hinge mechanism 4 are provided.

  Specifically, the rear seat 1 is configured such that the seat back 2 can be tilted between a standing posture P <b> 1 standing up with respect to the seat cushion 5 and a forward posture P <b> 2 leaning forward toward the seat cushion 5 side.

  The seat back 2 includes a divided sheet 2a and a divided sheet 2b that are divided into left and right at a ratio of 6: 4, and a catch mechanism 6 that is provided at each of the left and right outer positions of the divided sheets 2a and 2b. In the present embodiment, the seat back 2 divided at a ratio of 6: 4 is described. However, the ratio of the division is not particularly limited. For example, the sheet is divided at a ratio of 5: 5. The back 2 may be used.

  Each of the divided sheets 2a and 2b is formed by covering a back frame (not shown) formed corresponding to each outer shape with a skin (trim) 7 including a cushion material or the like.

  In addition, the lower ends of the divided sheets 2a and 2b are provided on the floor panel 3 by the hinge mechanisms 4 provided at the respective inner positions and the vehicle body side hinge mechanisms (not shown) provided at the respective left and right outer positions. On the other hand, it is supported so as to be tiltable about an axis J1 along the left-right direction. Thereby, each of the divided sheets 2a and 2b can be tilted between the standing posture P1 and the forward-turning posture P2.

  The catch mechanism 6 is provided so as to be exposed from the skin 7 of each of the divided sheets 2a and 2b, and fixes each of the divided sheets 2a and 2b to the vehicle body side in the standing posture P1.

  Since the catch mechanism 6 is a well-known holding mechanism that cooperates with the striker S provided on the vehicle body side, a detailed description thereof will be omitted, but the striker S is received in a lock groove formed in a built-in lock plate. The striker S is locked in the lock groove by rotating the lock plate, while the striker S can be released by rotating the lock plate to the release position.

  As described above, each of the divided sheets 2a and 2b in the standing posture is firmly fixed to the vehicle body side at the left and right outer ends by the catch mechanism 6, while the hinge mechanism 4 at the left and right inner ends. It is only fixed to the vehicle body. Therefore, when an impact is applied from the rear to the seat back 2 in the standing posture, each of the divided sheets 2a and 2b has a structure in which the upper end portions of the left and right inner ends are maintained while maintaining the positions of the left and right outer ends. Although it becomes easy to displace forward (distortion displacement), the hinge mechanism 4 according to the present invention is configured to suppress this forward displacement.

  FIG. 3 is an enlarged perspective view showing the hinge mechanism of FIG. 4A and 4B show the entire configuration of the hinge mechanism of FIG. 1, wherein FIG. 4A is a front view and FIG. 4B is a side view. In addition, it demonstrates below using the front-back and left-right direction of the vehicle to which the hinge mechanism 4 was attached.

  2 to 4, the hinge mechanism 4 includes a bracket (support member) 8 fixed on the floor panel 3 and a pair of left and right supported by the bracket 8 so as to be rotatable about the axis J1. The rotation holding piece 9 is provided.

  The bracket 8 is a metal plate that integrally includes a mounting portion 10 that is fixed on the floor panel 3 and a vertical portion 11 that is folded upward from the mounting portion 10 at a right angle.

  The mounting portion 10 has a shape bent at an appropriate position so that the mounting portion 10 can be placed along the surface shape of the floor panel 3. That is, in the vehicle according to the present embodiment, the floor panel 3b in front of the floor panel 3a in the luggage compartment R is inclined downward, but the mounting portion 10 includes the floor panel 3a and the floor panel 3b. And is bent so that the front is inclined downward corresponding to the surface shape of the floor panels 3a and 3b.

  In addition, a pair of front and rear fastening holes 12 are formed in the mounting portion 10, and the mounting portion 10 is fixed to the floor panel 3 by bolts B <b> 1 inserted into the fastening holes 12 from above.

  The upright portion 11 is formed by bending the left end of the mounting portion 10 upward, so that a portion in the height range H1 above the mounting portion 10 rises upward from the floor panel 3a in the cargo compartment R.

  As shown in FIG. 4B, the upright portion 11 has a substantially triangular side surface shape having a front side 11a extending substantially upward and a rear oblique side 11b inclined forward.

  Further, the vertical portion 11 is formed with a hole 14 penetrating in the left-right direction, and the hole 14 is formed with a portion that divides the vertical portion 11 in the front-rear direction. That is, the upright portion 11 has a front edge 15 between the hole 14 and the front side 11a and a rear edge 16 between the hole 14 and the rear hypotenuse 11b in the vertical range H2 where the hole 14 is formed. It is divided into and.

  And since the said hole 14 is arrange | positioned in the back position of the vertical part 11, the front-back width dimension W1 of the front side edge part 15 is wider than the width dimension W2 of the rear side edge part 16. FIG. Therefore, the front side edge portion 15 can ensure a bending strength in the front-rear direction larger than that of the rear side edge portion 16.

  Furthermore, as shown by the ridgeline L1 and the ridgeline L2, the front edge 15 is formed with bent portions (reinforcing means) 17 that are folded back at two locations. The bent portion 17 is formed by folding the front side edge 15 back and forth along the ridgelines L1 and L2 in a zigzag manner.

  Therefore, the front side edge portion 15 can ensure a greater bending strength in the front-rear direction than the rear side edge portion 16 because the bent portion 17 is formed.

  A shaft J1 extending in the left-right direction is provided through the upper portion of the upright portion 11, and a rotation holding piece 9 is pivotally supported at each of the left and right ends of the shaft J1.

  Each of the rotation holding pieces 9 is a metal that integrally includes a shaft support portion 18 disposed along the left and right surfaces of the upright portion 11 and a holding portion 19 that is folded back in a direction away from the shaft support portion 18 in the left-right direction. It is a board.

  The holding portion 19 is fixed to the back frame of the seat back 2 by bolts or the like (not shown) inserted through a pair of upper and lower mounting holes 19a, so that the seat back 2 can tilt with respect to the bracket 8 about the axis J1. It comes to hold.

  Hereinafter, the operation of the rear seat 1 when the test block T is caused to collide in order to carry out the automobile safety confirmation test (for example, the automobile regulations ECE No. 17) will be described.

  FIG. 5 is a side view showing a state in which the test block collides with the vehicle seat in FIG. 1, and shows a state in which the seat back is tilted forward. FIG. 6 is a side view showing a state of the hinge mechanism after the collision of the test block.

  2, 5 and 6, in the confirmation test, first, a test block T (length 300 mm × length) placed on a mat M fixed on a floor panel 3 a in the cargo compartment R. A cube having a width of 300 mm and a weight of 18 kg is advanced at a predetermined speed toward the boundary between the two divided sheets 2a and 2b.

  As shown in FIG. 2, when the test block T comes into contact with the seat back 2, the left and right outer positions of the seat back 2 are held by the catch mechanism 6, and as shown in FIG. The inner position tilts forward while being distorted.

  As shown in the figure, when the tilting of the two divided sheets 2a and 2b proceeds, the lower part of the test block T comes into contact with the bracket 8 of the hinge mechanism 4.

  When the test block T further advances from this state, as shown in FIG. 6, the rear edge portion 16 in contact with the test block T is deformed forward, whereby the test block T collides. It is possible to suppress the shock from being transmitted to the portion where the bracket 8 is fixed to the floor panel 3 (that is, the bolt B1).

  At this time, the front edge 15 has a width W1 (see FIG. 4) wider than the rear edge 16, and a bent portion 17 is formed on the front edge 15, so the front edge 15 Even if 16 is deformed, the form of the front edge 15 can be maintained, and the entire bracket 8 can be prevented from tilting forward.

  As described above, according to the rear seat 1, by forming the hole 14 penetrating in the left-right direction, the bracket 8 is moved back and forth in the range H2 (see FIG. 4B) where the hole 14 is formed. Since it can divide | segment, the force for deform | transforming the bracket 8 to the front-back direction can be made small compared with the structure in which this hole 14 is not comprised.

  And since the hole 14 is formed in the range H1 (refer FIG. 4) which stands above the floor panel 3a in the luggage compartment R, when the test block T collides with the seat back 2 from the rear, Even when the test block T collides with the portion of the range H1, the impact received by the bracket 8 from the test block T as a result of the impact being absorbed by the deformation of the bracket 8 (rear edge 16). Among them, the impact transmitted to the portion fixed to the floor panel 3 (that is, the bolt B1) can be reduced.

  Therefore, according to the said rear seat 1, even if it is a case where the block T for a test | truck collides directly, safety | security can be improved more by preventing beforehand that a fixing part with the floor panel 3 is damaged. .

  According to the embodiment in which the hole 14 is formed at the rear position of the bracket 8, the test block T can be formed by reducing the front-rear width dimension W <b> 2 (see FIG. 4B) for the rear edge 16. On the other hand, the front edge 15 can be easily deformed at the time of collision, while the width W1 is increased to make it difficult to deform at the time of collision of the test block T, so that the entire bracket 8 is moved forward. Can be suppressed.

  Therefore, according to the embodiment, at the time of the collision of the test block T, the seat 8 is prevented from tilting while effectively absorbing the shock due to the deformation of the rear edge 16. The support state of the back 2 can be maintained.

  According to the embodiment in which the bent portion 17 is formed with respect to the front edge 15, the bending strength in the front-rear direction of the front edge 15 can be improved. While the shock absorption due to the deformation of 16 is performed, it is possible to suppress the front edge 15 from being deformed and to prevent the entire bracket 8 from tilting forward.

  In particular, in the above-described embodiment, the bent portion 17 is formed by folding the plate-like bracket 8 along the ridgelines L1 and L2. Therefore, the bracket 8 can be reinforced by a simple method.

It is a perspective view showing the whole rear seat composition concerning the embodiment of the present invention. It is a side view of the rear seat of FIG. It is a perspective view which expands and shows the hinge mechanism of FIG. The whole structure of the hinge mechanism of FIG. 1 is shown, (a) is a front view, (b) is a side view. FIG. 2 is a side view showing a state in which a test block collides with the vehicle seat in FIG. 1 and shows a state in which a seat back is tilted forward. It is a side view which shows the state of the hinge mechanism after the collision of the block for a test.

Explanation of symbols

1 Rear seat (vehicle seat)
2 Seat back 3 Floor panel (floor)
3a Floor panel (floor in the cargo compartment)
4 Hinge mechanism 8 Bracket (support member)
14 hole 15 front side edge 16 rear side edge 17 bent part H1 range (range corresponding to the rising part)
R luggage compartment

Claims (4)

A hinge mechanism that supports a seat back provided in front of a luggage compartment of a vehicle so as to be tiltable back and forth with respect to a floor,
Including a portion that rises above the floor in the cargo compartment in a state of being fixed on the floor, and includes a support member that supports the seat back so as to be tiltable back and forth,
A hinge mechanism characterized in that a hole penetrating in the left-right direction is formed in the support member.   The hinge mechanism according to claim 1, wherein the hole is formed at a rear position of the support member in a state where the support member is fixed on the floor.   In the state where the support member is fixed on the floor, a reinforcing means for improving the bending strength in the front-rear direction of the edge portion is provided at the front edge portion of the edge portion of the support member surrounding the hole. The hinge mechanism according to claim 1, wherein the hinge mechanism is provided.   In the support member, at least a part of the rising portion is formed in a plate shape, and the reinforcing means improves the bending strength in the front-rear direction of the edge portion by bending the plate-like portion. The hinge mechanism according to claim 3, wherein:

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