JP4754274B2 - Lower belt cover mounting structure on the back of the seat - Google Patents

Description

  The present invention relates to a lower belt cover mounting structure on the back of a seat. More specifically, the present invention relates to a lower belt cover mounting structure for covering the connection portion between the back of the seat back and the seat cushion.

Conventionally, in order to improve the designability of the connection part of the seat back and seat cushion which comprise a seat, covering this connection part is considered. That is, for example, when the seat is provided with various devices such as an airbag, parts such as wiring may be arranged through the seat back and the seat cushion. Thereby, for example, when the seat back and the seat cushion are configured as separate bodies, components such as wiring may be exposed at the connection portion between the two, and the appearance from the rear of the seat may be impaired. Therefore, a so-called lower belt cover is provided on the back of the seat so as to cover the connection portion from the outside.
Specifically, for example, a technique disclosed in Patent Document 1 is known as this type of lower belt cover. In this disclosure, a lower belt cover made of a cloth-made flexible material is disposed in a state of being connected to the back of the seat back and the rear portion of the seat cushion. Specifically, the lower belt cover has an upper portion thereof, that is, a surplus portion covering the connection portion is concealed inside the back board of the seat back, and a lower portion is fixed to the seat cushion. The lower belt cover is assembled to the seat back in such a state that the upper part concealed inside the backboard is elastically pulled and suspended by an elastic member such as rubber or a spring. Thus, for example, even when the tilting posture of the seat back with respect to the seat cushion is changed by the reclining mechanism, the lower belt cover is bent or the lower belt cover is elasticated from the lower end side of the backboard according to the tilt angle. Can be pulled out and pulled in.
JP 2004-351139 A

  However, in the conventional lower belt cover mounting structure described above, the lower belt cover is formed of a flexible material so as to correspond to the reclining operation of the seat. Therefore, for example, when a load is applied from the outside to a portion covered with the lower belt cover, the lower belt cover is easily bent and deformed. As a result, there is a risk of damage to the lower belt cover itself and parts such as wirings disposed therein. Therefore, in order to protect the lower belt cover and the components such as the wiring arranged therein against the load, for example, it is conceivable to form the lower belt cover with a material having a relatively high rigidity. However, such a configuration causes a problem that the lower belt cover cannot follow the reclining operation of the seat.

  The present invention was devised to solve the above-described problems, and the problem to be solved by the present invention is the design of the connection portion between the seat back and the seat cushion, which is the original function of the lower belt cover. Without lowering the performance improvement function, the lower belt cover itself can be made difficult to deform with respect to external loads, and it can follow the reclining operation of the seat so that it can respond to external loads. Is to make it.

In order to solve the above problems, the seat back / back belt cover mounting structure of the present invention takes the following means.
First, in the first invention, the seat is configured such that the seat back is connected to the seat cushion so as to be tiltable, and the lower portion of the seat back covers the connection portion from the back of the seat back to the seat cushion. A lower belt cover mounting structure on the back of the seat where the belt cover is disposed, the lower belt cover made of a material that is relatively difficult to bend such as metal or resin, and the lower belt cover provided at the rear position on the seat cushion side. Hinge means for pivotally supporting the lower part of the seat, a contact support part surface formed as a contact surface on the back of the seat back at a position in contact with the upper part of the lower belt cover, and a seat cushion side An urging means for urging the upper part of the lower belt cover that is pivotally supported at the rear position in a direction to abut against the abutting support part surface formed on the back of the seat back, and disposed on the back side of the seat back. And a covering member that covers the outer surface of the contact portion of the upper portion of the lower belt cover with the contact support portion surface, and the lower belt cover is hinged at a rear position on the seat cushion side when the seat back is tilted Accordingly, the upper part of the seat back is rotated in a state of being in contact with the abutting support part surface formed on the back side of the seat back, and the connection part between the back of the seat back and the seat cushion is always covered. Is.
According to the first aspect of the invention, since the lower belt cover is formed of a material that is relatively difficult to bend such as metal or resin, it is difficult to deform against a load received from the outside. When the seat back is tilted, the lower belt cover rotates around the rotation axis of the hinge means connected to the lower part. Then, the lower belt cover moves along the contact support part surface while the upper part is urged by the urging means along with the rotation. This allows the lower belt cover to follow and rotate with respect to the reclining operation of the seat. At this time, the lower belt cover is always in a state where the upper portion is covered with the covering member in the tilting region of the seat back.

Next, according to a second aspect, in the first aspect described above, the seat includes a tilt-down mechanism in which the back and back surfaces of the seat back that is brought down to the seat cushion side are used as a floor surface in the cargo space. The lower belt cover is formed so as to have a shape along the outer peripheral edge shape of the reclining device when the seat back is brought down to the seat cushion side.
According to the second aspect, when the back surface of the seat back is used as a floor surface in the cargo space, the shape of the floor surface is smoothly formed by the lower belt cover. Specifically, the step shape generated between the back surface of the seat back and the reclining device is made smooth by the lower belt cover.

Next, a third invention is the above-described first or second invention, wherein the lower belt cover is formed to have a shape curved in the out-of-plane direction of the belt surface.
According to the third aspect of the invention, the section modulus with respect to the load received from the outside of the lower belt cover is improved. Thereby, a lower belt cover becomes difficult to change with respect to the load received from the outside.

Next, according to a fourth aspect of the present invention, in any one of the first to third aspects described above, the connection position between the lower portion of the lower belt cover and the hinge means is set at an upper position on the seat cushion side. is there.
According to the fourth aspect of the present invention, the region in which the lower belt cover swings within the seat cushion is reduced when the seat back is tilted. Thereby, it becomes difficult for other members, such as a lower belt cover and a reclining shaft, to interfere. Further, when combined with the second and third inventions, when the seat back is returned to the use position where the occupant is seated, the curved shape portion of the lower belt cover is difficult to protrude to the rear of the seat.

The present invention can obtain the following effects by taking the above-described means.
First, according to the first invention, the lower belt cover is not easily deformed by a load received from the outside without impairing the original design improvement function and is made to follow the reclining operation of the seat. Can do.
Furthermore, according to 2nd invention, when using the back back surface of a seat back as a floor surface in cargo space, the appearance of the connection location of a seat back and a seat cushion can be improved. Moreover, since the level | step difference which arises between the back back surface of a seat back and a reclining apparatus can be eliminated, the floor surface in a luggage compartment space can be used effectively. Also, when used as a luggage storage, the loaded luggage can be stably supported.
Furthermore, according to the third invention, the lower belt cover can be made more difficult to deform with respect to a load received from the outside.
Furthermore, according to the fourth aspect, it is possible to make the lower belt cover difficult to cause interference with other members such as the reclining shaft, and the lower belt cover can be configured compactly. And when combined with the second invention or the third invention, the lower belt cover can be made difficult to protrude rearward of the seat. Therefore, the appearance of the connecting portion between the seat back and the seat cushion can be further improved. In addition, the empty space to be secured behind the seat can be kept small.

Embodiments of the best mode for carrying out the lower belt cover mounting structure of the seat back and back of the present invention will be described below with reference to the drawings.
1 to 5 show the configuration of the lower belt cover mounting structure of the seat back of the present embodiment. 1 is a perspective view showing the overall configuration of the lower belt cover mounting structure of the seat back, FIG. 2 is an exploded perspective view of the lower belt cover mounting structure of the seat back, and FIG. 3 is the lower belt cover mounting structure of the seat back. 4 is a side view showing a state where the seat 10 is tilted forward from the state of FIG. 3, and FIG. 5 is a side view showing a state where the seat 10 is in a tilted down state. Here, in FIG.1 and FIG.2, it is represented as the state where the back back carpet 5 mentioned later was abbreviate | omitted. 3 to 5, the left direction in the drawing is represented as the vehicle front direction.

The seat 10 in this embodiment is applied as a rear seat of a vehicle.
As shown in FIG. 1, the seat 10 includes a reclining device (not shown) that connects the seat back 20 to the seat cushion 30 so as to be tiltable. Specifically, the reclining device connects the seat back 20 so as to be rotatable around the reclining shaft 12a. Then, by operating a release lever (not shown), the seat back 20 is switched to a state in which the seat back 20 can be rotated around the reclining shaft 12a. Thereby, the standing angle (tilting angle) of the seat back 20 with respect to the seat cushion 30 can be adjusted. When the seat 10 is in use, the seat back 20 is held, for example, in a standing posture position indicated by a solid line in FIG. In addition, since the structure of a reclining apparatus is a well-known thing, detailed description is abbreviate | omitted.
Further, the seat 10 when not in use is brought into a retracted state by being brought into a retracted position (a position indicated by an imaginary line) at a lower position in front of the vehicle with respect to the use position indicated by a solid line in FIG. Tilt-down mechanism (not shown). The tilt-down mechanism moves the seat cushion 30 downward by moving a release lever (not shown) and moves the seat back 20 onto the dropped seat cushion 30 so that the seat cushion 30 is retracted. To do. As a result, a large cargo space behind the seat 10 can be secured. And the luggage compartment space can be substantially expanded by using the back surface 20a of the seat back 20 which is brought down to the seat cushion 30 side as the floor surface F in the luggage compartment space. Since the configuration of this tilt-down mechanism is a known one, detailed description thereof is omitted.
Further, between the back of the seat back 20 and the seat cushion 30, a lower belt cover 1 for covering these connection locations C with respect to the outside is disposed. The lower belt cover 1 is arranged to improve the appearance of the sheet 10 by covering the connection portion C with the outside. Hereinafter, the attachment structure of the lower belt cover 1 will be described in detail.

That is, first, the lower belt cover 1 is made of a material that is relatively difficult to bend such as metal or resin, and as shown in FIG. 2, the entire width direction of the lower belt cover 1 is in the direction out of the band surface 1c (the paper surface of FIG. 3). It is formed in a shape curved to the inner right). Thereby, the lower belt cover 1 is configured to be difficult to be deformed with respect to a load received from behind the seat 10 (see FIG. 1). Further, as shown well in FIG. 5, the lower belt cover 1 has a curved surface shape along the outer peripheral edge 12b of the reclining device when the seat back 20 is tilted forward of the vehicle by the tilt-down mechanism. Is formed. The shape of the outer peripheral edge 12b of this reclining device is actually formed as the shape of the outer peripheral edge of a support base D described later.
As shown well in FIG. 2, the lower band cover 1 has a lower end portion 1 a rotatably connected by a hinge member 2 disposed at a rear side position of the seat cushion 30 (see FIG. 1). It is supported. And the upper end part 1b is elastically connected with respect to the seat back 20 by the suspension rubber | gum 3, as FIG.3 and FIG.4 shows well. Specifically, the upper end portion 1 b is held in a state of being in contact with the contact support portion surface 21 b formed on the back of the seat back 20 by the elastic restoring force of the suspension rubber 3. The configurations of the hinge member 2, the suspension rubber 3, and the contact support portion surface 21b will be described later. Here, the hinge member 2 corresponds to the hinge means of the present invention, and the suspension rubber 3 corresponds to the urging means of the present invention.
Further, as well shown in FIGS. 3 and 4, the back of the seat back 20 is provided with a back carpet 5 as a skin. The back carpet 5 is arranged so as to cover the outer surface (band surface 1c) of the lower belt cover 1 from the outside. The back carpet 5 is fixed to the seat back 20 by, for example, stitching with the carpet covered on both sides of the seat back 20. Therefore, the back carpet 5 moves integrally with the seat back 20 by tilting the seat back 20 forward of the vehicle. Thereby, the back carpet 5 exposes the lower belt cover 1 from the lower end side to the outside. However, the back carpet 5 always maintains at least the upper end portion 1b of the lower belt cover 1 in the tilting region of the seat back 20 depending on the length thereof. Here, the back carpet 5 corresponds to the covering member of the present invention.

Specifically, as shown in FIG. 2, the hinge member 2 includes a rod 2a as a pivot axis, a mounting bracket 2b coupled to the rod 2a so as to be pivotable, and a support base D. And a support bracket 2c integrally connected to the frame Df forming the skeleton. Here, as well shown in FIG. 1, the support base D supports the seat cushion 30 from below and supports the seat back 20 so as to be rotatable by the reclining shaft 12a. That is, the support base D is configured as a member corresponding to the seat cushion side in the present invention.
Next, the end of the rod 2a is bent in an L shape, as well shown in FIG. The rod 2 a is fixed to the lower belt cover 1 by, for example, inserting a bent portion into a portion such as an insertion portion 1 e formed in the lower belt cover 1.
Next, the mounting bracket 2b is assembled in a state of being inserted through the two positions of the rod 2a, and is relatively rotatable around the axis with respect to the rod 2a.
Next, the support bracket 2c is disposed at the rear side position of the frame Df. The support bracket 2c is disposed at two positions corresponding to the mounting bracket 2b, and is integrally welded to the frame Df.
The hinge member 2 can be assembled by aligning the mounting bracket 2b assembled to the lower band cover 1 with the support bracket 2c and fastening them with fastening means such as bolts B and nuts N (see FIG. 3). ). Thereby, the lower end part 1a of the lower belt cover 1 is rotatably supported by the hinge member 2 at the rear side position of the support base D. Specifically, the arrangement position of the rod 2a, which is the rotational axis of the hinge member 2, is set at an upper position of the support base D, as well shown in FIGS. More specifically, it is set at a position behind the reclining shaft 12a.

  Next, the suspension rubber 3 is formed in an endless shape, as well shown in FIG. 1, and its lower portion is fixed in a state of being wound around the upper end portion 1 b of the lower belt cover 1. . A hook 4 is provided on the back of the seat back 20 at a position (for example, one position) where the suspension rubber 3 can be hooked in a tension state. Therefore, the lower belt cover 1 is elastically connected to the back of the seat back 20 and assembled by hooking the upper portion of the suspension rubber 3 assembled on the lower belt cover 1 side to the hook 4. As a result, the suspension rubber 3 is pulled up by the elastic restoring force so that the upper end portion 1b of the lower belt cover 1 is pulled upward, and is held in a state where the upper end portion 1b is in contact with the contact support portion surface 21b. An urging force to act is applied. In addition, the suspension rubber | gum 3 is not limited to the said form, For example, a thing with end shape may be sufficient and the structure connected using multiple may be sufficient. Further, instead of the suspension rubber 3, another elastic member such as a tension spring may be applied.

  Next, the contact support part surface 21b is formed in the lower part of the back surface 21a of the frame 21 forming the skeleton of the seat back 20, as well shown in FIG. Therefore, the contact support portion surface 21 b is formed as a rigid body due to the rigidity of the frame 21. The abutting support part surface 21b is formed in a smooth surface along the vertical direction of the seat back 20, and allows the upper end part 1b of the lower belt cover 1 to abut on to slide. The shape of the abutting support portion surface 21b is not particularly limited as long as it allows the upper portion of the lower belt cover 1 to slide, for example, a curved shape.

Subsequently, a method of using the present embodiment will be described. That is, as well shown in FIGS. 3 and 4, when the seat back 20 is tilted (reclined) with respect to the seat cushion 30 (see FIG. 1), the lower belt cover 1 follows the reclining operation of the seat 10. . Specifically, the upper end portion 1 b of the lower belt cover 1 is elastically connected to the seat back 20 by the suspension rubber 3. The upper end portion 1b is supported by the contact support portion surface 21b so as to be slidable in the vertical direction of the seat back 20. The lower end portion 1a is connected and supported by the hinge member 2 so as to be rotatable with respect to the support base D. Therefore, when the seat back 20 tilts around the reclining shaft 12a, the lower belt cover 1 rotates about the rotation axis (rod 2a) of the hinge member 2. Thereby, the lower belt cover 1 follows and rotates while maintaining the state in which the upper end portion 1b is in contact with the contact support portion surface 21b. Then, the lower belt cover 1 is always held in a state where the connection portion C between the back of the seat back 20 and the seat cushion 30 (see FIG. 1) is covered in the tilting region of the seat back 20.
As shown well in FIG. 5, the lower belt cover 1 is disposed at a position along the shape of the outer peripheral edge 12 b of the reclining device when the seat back 20 is tilted forward by the tilt-down mechanism. . Thereby, the level | step difference shape produced between the back back surface 20a of the seat back 20 and the outer periphery 12b of a reclining apparatus is made into a smooth shape.

Thus, according to the lower belt cover mounting structure of the back of the seat of the present embodiment, the lower belt cover 1 is formed from a material that is difficult to bend and is received from the outside without impairing the design improvement function that is the original function of the lower belt cover 1. It can be made the structure which makes it difficult to deform | transform with respect to load and can follow the operation | movement of the reclining of the sheet | seat 10. Therefore, for example, when the seat 10 is in the use position, the lower belt cover 1 itself and components such as wirings arranged therein are also attached even when a load is applied by the foot of the seated person of the rear seat hitting. Can be protected without damage. Further, when the seat 10 is in the retracted position, that is, when the back surface 20a of the seat back 20 is used as the floor surface F in the luggage compartment space, the same function can be exhibited and the loaded luggage Can be stably supported. Furthermore, the appearance of the connection portion C between the seat back 20 and the seat cushion 30 can be improved. Moreover, since the level | step difference produced between the back back surface 20a of the seat back 20 and the reclining apparatus can be eliminated, the floor surface F in the luggage space can be effectively used.
Furthermore, since the lower belt cover 1 is formed in a shape curved in the out-of-plane direction of the belt surface 1c, it can be made more difficult to deform against a load received from the outside.
Further, the arrangement of the pivot axis (rod 2a) of the hinge member 2 corresponding to the hinge means of the present invention is set at the upper position on the seat cushion 30 side, so that the lower belt cover 1 and the reclining shaft 12a and the like are arranged. It can be set as the arrangement configuration which does not interfere with a member easily. Moreover, since the curve of the shape part in alignment with the shape of the outer periphery 12b of the reclining apparatus in the lower belt | band | zone cover 1 by this is restrained small, a shape can be made compact. Furthermore, when the seat back 20 is returned to the use position where the occupant is seated, the curved portion of the lower belt cover 1 can be made difficult to protrude to the rear of the seat 10. Thereby, while being able to improve the appearance of the connection location C between the seat back 20 and the seat cushion 30, the empty space which should be ensured behind seat 10 can be restrained small.

Although the embodiment of the present invention has been described with one embodiment, the present invention can be implemented in various forms in addition to the above embodiment.
For example, in the case where the back carpet 5 (corresponding to the covering member of the present invention) is arranged outside the lower belt cover 1 as in the present embodiment, the upper end portion of the lower belt cover is a contact support portion. It is good also as a structure which does not provide the suspension rubber | gum 3 (member corresponding to the suspension member of this invention) made to contact | abut to a surface. That is, at least the lower belt cover can be made to follow and rotate by the back carpet. However, in this case, since the contact state between the lower belt cover and the contact support portion surface is not stably maintained, care must be taken because the lower belt cover may be rattled. Further, the suspension rubber may be in an assembled state in which at least the lower belt cover is brought into contact with the contact support portion surface, and the configuration of the hooking position and the like is not particularly limited.
Moreover, although the hinge member 2 is shown as a structure corresponding to the hinge means of the present invention, the lower belt cover is configured to be rotatable, for example, by connecting a flexible material to the lower end portion of the lower belt cover. May be. However, in this case, it is preferable that a certain support strength is secured at the lower end portion. Moreover, although the thing which set the position of the rotating shaft center of the hinge member 2 to the upper position by the side of the seat cushion 30 was shown, you may set to the lower position. However, in this case, for example, when the lower belt cover is adapted to the shape of the outer peripheral edge of the reclining device, the curved shape becomes larger, or other members such as the lower belt cover and the reclining shaft easily interfere with each other. It should be noted that when the seat back is returned to the use position where the occupant is seated, the curved portion of the lower belt cover may easily protrude to the rear of the seat. In addition, although the configuration in which the hinge member 2 is attached to the frame Df that forms the skeleton of the support base D is shown, a configuration in which the hinge member 2 is attached to the frame that forms the skeleton of the seat cushion may be employed.
Further, although the lower belt cover 1 is shown to have a shape that fits the outer peripheral edge 12b of the reclining device, it is not always necessary to have such a shape. However, in this case, it should be noted that a step shape may be formed between the back and back surface of the seat back that is tilted toward the seat cushion and the reclining device.
Moreover, although what formed the lower belt | band | zone cover 1 in the curved shape was shown, you may form in flat form, for example. However, in this case, the configuration is more easily deformed with respect to a load received from the outside as compared with that shown in the present embodiment. Therefore, it is necessary to increase the rigidity of the lower belt cover accordingly.

It is a perspective view which shows the whole structure of the lower belt cover attachment structure of a seat back back. It is a disassembled perspective view of the lower belt cover attachment structure of the back of the seat. It is a side view of the lower belt cover attachment structure of the back of the seat. FIG. 4 is a side view showing a state where the seat is tilted forward from the state of FIG. 3. FIG. 6 is a side view showing a state where the seat is in a tilted down state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lower belt | band | zone cover 1a Lower end part 1b Upper end part 1c Band surface 1e Insertion part 2 Hinge member (hinge means)
2a Rod 2b Mounting bracket 2c Support bracket 3 Suspension rubber (biasing means)
4 Hook 5 Back carpet (coating material)
DESCRIPTION OF SYMBOLS 10 Seat 12a Reclining shaft 12b Outer periphery 20 Seat back 20a Back back surface 21 Frame 21a Back back surface 21b Contact support part surface 30 Seat cushion C Connection location F Floor surface B Bolt D Support stand Df Frame

Claims (4)

The seat is configured such that the seat back is tiltably connected to the seat cushion, and a lower belt cover is provided on the back of the seat back so as to cover a connection portion from the back of the seat back to the seat cushion. The lower belt cover mounting structure of the seat back,
A lower belt cover made of a material that is relatively difficult to bend such as metal or resin;
Hinge means provided at a rear position on the seat cushion side and rotatably supporting a lower portion of the lower belt cover;
A contact support part surface formed as a contact surface on the back of the seat back at a position in contact with the upper part of the lower belt cover;
An urging means for urging an upper part of a lower belt cover supported rotatably at a rear position on the seat cushion side in a direction of abutting on a contact support part surface formed on a back of the seat back;
A covering member disposed on the back side of the seat back and covering an outer surface of a contact portion of the upper portion of the lower belt cover with the contact support portion surface;
Have
When the seat back is tilted, the lower belt cover is rotated in a state where the upper portion thereof is in contact with the contact support portion surface formed on the back side of the seat back by the hinge means at the rear side of the seat cushion side. The lower belt cover mounting structure for the back of the seat back, characterized in that it is configured to cover the connection portion between the back of the seat back and the seat cushion at all times. The lower belt cover mounting structure of the back of the seat according to claim 1,
The seat includes a tilt-down mechanism in which the back and back surfaces of the seat back that is tilted to the seat cushion side are used as a floor surface in the cargo space.
The lower belt cover is formed so as to have a shape that conforms to the outer peripheral edge shape of the reclining device when the seat back is folded down to the seat cushion side. Mounting structure. The lower belt cover mounting structure of the back of the seat according to claim 1 or 2,
The lower belt cover mounting structure according to claim 1, wherein the lower belt cover has a shape curved in an out-of-plane direction of the belt surface. A lower belt cover mounting structure for the back of the seat back according to any one of claims 1 to 3,
A lower belt cover mounting structure on the back of the seat back, wherein a connecting position between a lower portion of the lower belt cover and the hinge means is set at an upper position on the seat cushion side.

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