JP5224043B2 - Seat belt buckle support structure for folding seats for vehicles - Google Patents

Description

  The present invention relates to a seat belt buckle support structure for a folding seat for a vehicle that can be folded forward and downward in conjunction with an operation of lying a seat back on a seat cushion.

  Seats of automobiles are obliged to install seat belts, but the folding rear part where the positional relationship between the body floor and the seat cushion changes relative to the front seat and the fixed rear seat with limited range of motion. The seat further requires a support structure that does not hinder the folding operation of the seat and that the seat belt buckle is always disposed on the side of the seat in the sitting position.

  For example, for a vehicle with a tilt-down storage structure in which the seat cushion sinks forward and downward in conjunction with the operation of lying down on the seat cushion, and a flat flat surface can be formed continuously on the cargo floor by the back of the seat back In the folding sheet, a flexible webbing type buckle is selected so as not to hinder the sheet folding operation. However, since such a webbing type buckle is not self-supporting, when the seat is returned to the seating position, the buckle lies on the cushion and the seating surface becomes complicated, or the seating surface falls and the occupant sits on the seat. There is a risk that the belt cannot be mounted smoothly.

  In Patent Document 1, a boot is attached to a webbing type buckle connected to a mounting bracket so that the buckle and the webbing are held in a straight line, while the mounting bracket (anchor plate) is pivotable. The whole can be swung, and the connecting part of the buckle and webbing is moored to the seat cushion with a rubber band so that the buckle is caused when the seat is returned from the folded position to the seating position. It is disclosed.

  However, in this configuration, since the buckle is stored and raised exclusively depending on the rubber band, there is a need for a space where the buckle can move freely on the side of the seat, and there is substantially no space between the left and right rear seats. In addition to being difficult to install on split-foldable folding seats and bench seats, the number of parts increases, the structure and assembly become complicated, and the cost increases.

  The mounting bracket is attached to the slider (rear leg) in order to respond to changes in the positional relationship with the vehicle body floor. However, it is necessary to secure a sufficient rotation space around the mounting bracket and the rubber band. Mounting space is also required, and the layout of the fixed-side hinge portion and cushion frame of the rear leg is limited. Furthermore, since the swing range of the buckle is large, there is a possibility that the buckle or the boot may sink under the seat cushion, or may interfere with a structure such as a frame or another mechanism.

Japanese Patent No. 3696610

  The present invention has been made in view of such a situation of the prior art, and the object thereof is a simple structure with a small number of parts, but does not hinder the folding operation of the seat and the buckle is seated at the seating position. An object of the present invention is to provide a seat belt buckle support structure that is always disposed laterally.

In order to solve the above-described problems of the prior art, the present invention can be folded forward and downward in conjunction with the operation of lying the seat back on the seat cushion and connected to the anchor below the seat cushion by webbing. A folding seat for a vehicle having a seat belt buckle and having a slit through which the buckle is inserted at a rear portion of the seat cushion. The slit penetrates the cushion pad vertically and rearwardly, and the lower end portion has an inner surface. A substantially cylindrical boot is mounted from the base of the buckle to the webbing, and the buckle and the webbing are inserted into the slit at the boot mounting part, while the anchor of the webbing the connecting portion or the vicinity thereof between said Webi Grayed has been set absence interval of the boot exposed, the mounting portion of the boot while being maintained in a straight line in the slit, can be flexed in the boot of the absence interval Features.

  Since the present invention is configured as described above, the boot that is attached to the buckle provides the webbing section with rigidity that enables the buckle to be self-supporting in the slit. While the buckle is always disposed at the proper position, the flexibility of the webbing is ensured by the boot non-existing section on the anchor side, and the movement of the seat cushion during the folding operation of the seat can be easily followed. In addition, since the flexible webbing part can contact the structure under the cushion near the anchor, the degree of freedom in the layout of the fixed-side hinge part and the cushion frame around the anchor is secured, and the boot and the structure Interference and associated malfunctions can be prevented.

  Further, in the present invention, in the aspect in which the boot non-existing section is set as a notched section in which at least one side edge of the boot is notched, the boot can be easily bent by the notched section, and the buckle is In addition to being able to follow the movement of the seat cushion during the folding operation of the seat, the boot is continued to the anchor so that the anchor is protected by the boot and the boot needs to be fixed to the webbing There is no advantage, and the relative movement in the width direction between the boot and the webbing is allowed, so that there is an advantage that the flexibility of the boot is improved.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing an outline of a folding seat 1 in which a seat belt buckle support structure according to the present invention is implemented, FIG. 3 is a side view showing a seating position thereof, and FIG. 4 is a side view showing a folding operation. As shown in FIGS. 1 and 3, the folding seat 1 is mainly composed of a seat cushion 2, a seat back 3, a pair of left and right rear legs 4 and a front leg 5. The folding sheet 1 in the illustrated example includes a slide mechanism 6 including a pair of left and right fixed slide rails 61 fixed to the vehicle body floor side, and a pair of left and right movable slide rails 62 slidably supported by the fixed slide rails 61. It is installed on the vehicle body floor, and the position in the front-rear direction can be adjusted by the slide mechanism 6.

  The seat cushion 2 is formed by stacking a cushion pad made of a cushion material such as urethane foam on the upper side of a cushion frame (not shown) and covering the surface with a skin material, and the seat back 3 is placed on the front side of the back frame (not shown). A cushion pad made of the same cushioning material as described above is stacked, and the surface thereof is covered with a skin material.

  The rear leg 4 is erected on the rear part of the pair of left and right movable slide rails 62, and the lower end portion of the seat back 3 is rotatably supported by the rotation shaft 31 at the upper end portion thereof. On the other hand, the front leg 5 is rotatably supported by a pivot shaft 52 of a bracket erected on the front portion of the movable slide rail 62, and the front leg 5 has a front lower portion on the upper end portion of the front leg 5. (A front portion of a cushion frame (not shown)) is supported so as to be rotatable. A pair of left and right arm portions 2 b integrated with the cushion frame are extended rearward and upward at the rear portion of the seat cushion 2, and the end portions of the arm portions 2 b are rotated by the rotation shaft 21. The shaft 31 is rotatably connected to the upper side of the shaft 31.

  That is, the folding seat 1 uses the rear leg 4 and the movable slide rail 62 as fixed nodes (31-52), and at both ends thereof, the rotating node (52-51) of the front leg 5 and the rotating node (31 of the seat back 3). -21) is rotatably connected, and these are connected by a swinging node (51-21) of the seat cushion 2 to constitute a four-bar linkage mechanism. From the seating position shown in FIG. As shown in FIG. 4, the seat cushion 2 is moved forward and downward as indicated by arrows b and b ′ (FIG. 4) in conjunction with the operation of tilting the frontward as indicated by arrows a and a ′ (FIG. 4). The seat back 3 ″ can be folded on the seat cushion 2 ″ and the seat back 2 ″ and the seat back 3 ″ can be folded from the folded position by raising the seat back 3 ″ rearward and upward. It is deployable in a seated position.

  As shown in FIG. 1, the folding seat 1 is provided with a buckle 11 for connecting the tongue 8 of the seat belt 7. As shown in FIG. 2, the buckle 11 has a fitting hole with the tongue 8 of the seat belt 7 at the tip end portion 11a, and a latch mechanism (not shown) for detachably connecting the tongue 8 therein. In addition, a release button 11b for releasing the latch mechanism is provided adjacent to the fitting hole. The buckle 11 is connected to the anchor plate 12 by a webbing 13 at a base part 11c, and a boot 14 is mounted from the base part 11c of the buckle 11 to the webbing 13.

  The boot 14 maintains the shape from the buckle 11 to the webbing 13 in a straight line shape and prevents the webbing 13 from being twisted. For example, the boot 14 is formed into a substantially cylindrical shape using a soft resin (elastomer) and has an appropriate holding capacity. It has shape and flexibility. The boot 14 is set to such a length that there is a section in which the webbing 13 is exposed between the boot 14 and the anchor plate 12, that is, a boot non-existing section 14a.

  After connecting the buckle 11 and the anchor plate 12 with the webbing 13, the boot 14 is inserted into the boot 14 from the anchor plate 12 side, and the base end of the boot 14 is attached to the buckle base 11c. By fixing to the webbing 13 by means such as sewing at the fixing point 14 a on the side, an assembly of the buckle 11 is configured together with the anchor plate 12 and the webbing 13.

  The anchor plate 12 is provided with a mounting hole 12a in the base portion and a long hole 12b for connecting the webbing 13 to the tip portion. In the state of the assembly of the buckle 11, the anchor plate 12 is shown in FIGS. As shown, the mounting hole 12a is fixed to one rear leg 4 with a bolt or the like. The anchor plate 12 may be pivotably mounted, but a frame 41 that integrally couples the left and right rear legs 4 and 4 is fixed in the vicinity of the mounting portion, and the frame 41 is shown in FIGS. 3 and 4. Therefore, the rotation range of the anchor plate 12 is limited.

  On the other hand, as shown in FIG. 1, a slit 20 through which the buckle 11 is inserted is formed on one side of the rear portion of the seat cushion 2. The slit 20 is oriented in the front-rear direction of the seat cushion 2 so as to hold the buckle 11 so as not to twist the seat belt 7 with respect to a seated occupant, and penetrates rearward and up-down with respect to the cushion pad. It forms as a notch part to be covered, and the inner surface of the notch part is covered with the skin material of the seat cushion 2.

  The inner surface of the slit 20 on the front side of the seat has an inclination that expands upward corresponding to the inclination of the buckle 11 that is inclined forward and forward. Moreover, the space | interval of both the inner surface in the lower end part of the slit 20 may be narrowed, and it may be made for the buckle 11 not to escape below. In that case, the slit 20 may be configured such that a slit penetrating up and down the inner bottom portion is formed in the inner bottom portion of the concave portion recessed from the seating surface side.

  When the buckle 11 is inserted into the slit 20 together with the boot 14, the front end portion 11 a (operation surface) is held in an upward state at the seating position of the folding seat 1 shown in FIGS. 1 and 3. The seat belt 7 can be easily attached by connecting the tongue 8, and the release operation using the release button 11b can be easily performed.

  The buckle 11 can be sunk into the slit 20 by an amount corresponding to the boot non-existing section 14a, but the thickness of the boot 14 in the webbing 13 section is smaller than the thickness of the buckle 11, and the lower end of the slit 20 is at the upper end. By being narrower than the portion, in the natural state, the buckle 11 protrudes above the slit 20 due to the elasticity of the cushion material on the inner surface of the slit 20.

  When the folding operation of the seat 1 is performed from such a seating position, the seat cushion 2 sinks forward and downward in conjunction with the operation of tilting the seat back 3 forward about the rotation shaft 31 as shown in FIG. Move so that Accordingly, the buckle 11 held in the slit 20 moves forward together with the slit 20 by the rotation of the anchor plate 12 around the mounting hole 12a, and the rotation of the anchor plate 12 is regulated by the frame 41. Later, when the buckle 11 ′ is pushed by the seat back 3 ′, the webbing 13 ′ in the boot non-existing section 14 a bends along the frame 41, and the buckle 11 ′ rotates relatively in the slit 20. In the folded state 1, the seat cushion 2 ″ of the folded seat cushion 2 ″ is accommodated in a lying state.

  Thus, due to the flexibility of the webbing 13 ′ in the boot non-existing section 14 a, the buckle 11 ″ accommodated in the slit 20 ″ in the folded state of the seat 1 is not pressed against the seatback 3 ″ that has been tilted forward, It is possible to prevent buckle marks from being formed on the surface of the seat back 3 ″. In addition, problems due to strong interference between the frame 41 and the boot 14 are also avoided.

  Conversely, when the seat 1 is returned from the folded position to the normal seating position, the buckle 11 ″ is raised in the slit 20 by the movement of the seat cushions 2 ″ and 2 ′, as shown in FIGS. It is restored to the state held in the slit 20 with the operation surface (tip portion 11a) facing upward. In this process, the inclination of the inner surface of the slit 20 functions as a guide surface for projecting the buckle 11 ″ from the slit 20 and deflecting it upward.

  In the above embodiment, the boot non-existing section 14a is provided in the vicinity of the anchor plate 12. However, as shown in FIG. 5A, the boot 15 covers the base 11c of the buckle 11 to the tip of the anchor plate 12. In addition, notches 15a and 15b are provided on the side edges corresponding to the folding direction of the seat of the boot 15, and a narrow portion between the notches 15a 'and 15b' as shown by 15 'in FIG. 5B. The boot 15 can be configured to bend easily.

  In this embodiment, since the tip of the anchor plate 12 is covered with the boot 15, it is possible to prevent generation or damage of contact sound due to direct contact between the anchor plate 12 and the frame 41. By omitting the fixing with the webbing 13, the movement of the webbing 13 in the width direction in the boot 15 is allowed, and thereby the flexibility of the boot 15 is improved.

  Since the support structure of the seat belt buckle 11 in each of the above embodiments does not require the buckle 11 to be disposed on the side of the seat in order to avoid the frame 41, the space between the left and right seats can be substantially eliminated, and the split type This is ideal for bench seat type folding seats that have integrated folding seats and left and right seats.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and changes can be made based on the technical idea of the present invention.

  For example, although the case where the folding seat 1 is attached to the vehicle body side via the slide mechanism 6 has been described in the above embodiment, the seatbelt buckle support structure of the present invention is such that the folding seat 1 does not go through the slide mechanism 6. It can also be carried out when it is attached to the side, in which case the anchor plate 12 may be directly fixed to the vehicle body side. Further, the seat belt buckle support structure of the present invention can be applied to a folding sheet other than a folding sheet by a four-bar linkage mechanism.

It is a perspective view which shows the outline | summary of the folding seat which implemented the seatbelt buckle support structure concerning this invention. It is a side view which shows the seatbelt buckle concerning 1st Embodiment of this invention. It is a side view which shows the seating position of the folding seat which implemented the seatbelt buckle support structure concerning this invention. It is a side view which shows folding operation of the folding sheet which implemented the seatbelt buckle support structure concerning this invention. A is a side view showing a seat belt buckle according to the first embodiment of the present invention, and B is a side view showing a bent state thereof.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Folding seat 2 Seat cushion 3 Seat back 4 Rear leg 5 Front leg 6 Slide mechanism 7 Seat belt 8 Tang 11 Buckle 12 Anchor plate 13 Webbing 14, 15 Boot 14a Boot non-existing section 15a, 15b Notch 20 Slit

Claims (2)

A seat belt buckle that can be folded forward and downward in conjunction with the operation of lying down the seat back on the seat cushion, and is connected to an anchor below the seat cushion by webbing, the buckle at the rear of the seat cushion. In the folding seat for a vehicle having a slit through which
The slit is at the lower end with vertical through and rearwardly relative to the cushion pad and spacing of the inner surface is narrowed, generally cylindrical boot is fitted over the said webbing from the base of the buckle, the buckle and the While the webbing is inserted through the slit at the mounting portion of the boot, a non-existing section of the boot where the webbing is exposed is set at or near the connecting portion of the webbing to the anchor, and the boot A seatbelt buckle support structure for a folding seat for a vehicle, wherein the seat can be bent in a non-existing section of the boot in a state where the mounting portion is maintained linearly in the slit .   The seat belt buckle support structure for a folding seat according to claim 1, wherein the boot non-existing section is set as a notched section in which at least one side edge of the boot is notched.

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