JP2001206125A - Lower anchor device for fixing child seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lower anchor device for fixing a child seat with a simple structure in which a mounting and a removal are easy, a falling down of the child seat can be certainly prevented and the number of parts is less. SOLUTION: In the lower anchor device, a child seat 10 is fixed to a seat 12 by fixing fix hooks 14L, 14R mounted to the child seat 10. The lower anchor device has a bar like member 20 fixed to the seat 12 and extending in a lateral direction of vehicle; and a pair of lower anchor members 22L, 22R disposed at an interval in the lateral direction of vehicle each other and fixed to the bar like member 20. The respective lower anchor member 22L, 22R have a pair of leg portions and engagement portions 22L, 22R integrally connecting a pair of leg portions and attachably/detachably engaging with the fix hook. One leg portion is fixed to the bar like member such that it is wound on the bar like member from above and the other leg is fixed to the bar like member such that it is wound on the bar like member from below.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a child seat for a vehicle such as an automobile, and more particularly, to a lower anchor device for fixing a child seat to a seat.

[0002]

2. Description of the Related Art In a child seat fixing device for fixing a child seat to a seat in a vehicle such as an automobile, a child seat is fixed to a seat back frame as described in, for example, JP-A-9-220952. BACKGROUND ART A child seat fixing device including a child seat anchor, a child seat bracket fixed to a child seat frame, and a pin connecting the anchor and the bracket has been conventionally known.

According to such a child seat fixing device, the child seat is securely fixed to the seat back as compared with a structure in which the child seat bracket is simply attached to and detached from the child seat anchor. In this case, it is possible to reliably prevent the child seat from falling over.

[0004]

However, in the above-described conventional child seat fixing device, the child seat is positioned with respect to the seat back so that the child seat bracket is positioned at a predetermined position with respect to the child seat anchor. Since the pins must be inserted and fixed in the holes of the child seat bracket and the child seat anchor, it is not easy to attach and detach the child seat, and the number of parts is large and the structure is complicated.

The present invention has been made in view of the above-mentioned problems in a conventional child seat fixing device configured so that a child seat bracket is connected and fixed to a child seat anchor by a pin, and a main object of the present invention. By devising the structure of the lower anchor device for fixing the child seat of the ISO-FIX type,
An object of the present invention is to provide a lower anchor device for fixing a child seat, in which the child seat can be easily attached and detached, the child seat can be securely prevented from tipping over, and the number of parts is small and the structure is simple.

[0006]

According to the present invention, there is provided, in accordance with the present invention, a structure for fixing a child seat to a seat in cooperation with a securing hook mounted on the child seat. To the anchor device,
A rod-shaped member fixed to a seat and extending substantially in the vehicle lateral direction, and a pair of lower anchor members spaced apart from each other in the vehicle lateral direction and fixed to the rod-shaped member, wherein each lower anchor member is a pair of lower anchor members. A leg portion and an engaging portion that integrally connects the pair of leg portions and detachably engages the fixed hook, and one of the pair of leg portions is at least partially wound around the rod-shaped member from above. The rod-shaped member is fixed to the rod-shaped member in a rotating manner, and the other of the pair of legs is fixed to the rod-shaped member in a manner to at least partially wind the rod-shaped member from below. This is achieved by a lower anchor device.

According to the configuration of the first aspect, one of the pair of legs of each lower anchor member is fixed to the rod-like member in a manner of winding the rod-like member at least partially from above,
Since the other of the pair of legs is fixed to the rod-like member in a manner of at least partially winding the rod-like member from below,
For example, in a situation where a force in the falling direction acts on the child seat and the fixing hook moves up and down relatively to the rod-shaped member, a bending load and a tensile load act on one of the pair of legs of each lower anchor member. A bending load and a compressive load act on the other of the pair of legs.

Accordingly, as compared with a structure in which each of the pair of legs is fixed to the rod-like member in such a manner that the rod-like member is partially wound from the upper side or the lower side, the relative position of the fixing hook to the rod-like member is relatively small. Up-and-down movement is reliably suppressed, so that the child seat is securely prevented from tipping over.

According to the present invention, in order to effectively achieve the above-mentioned main object, in the above-mentioned structure of the first aspect, the winding mode of the pair of lower anchor members around the rod-shaped member is different from each other. (The configuration of claim 2).

According to the second aspect of the present invention, the winding manner of the pair of lower anchor members with respect to the rod-shaped member is symmetrical with respect to the other, so that when the child seat moves up and down relatively with respect to the seat, the pair of lower anchor members is moved vertically. The lower anchor member bears a load symmetrically in the left-right direction, and when the child seat receives a force in the lateral overturning direction and loads are applied to the pair of lower anchor members in mutually opposite vertical directions, two lower anchor members are used. A compressive load acts on a pair of legs on the same side in the vehicle lateral direction, and a tensile load acts on a pair of legs on the opposite side. Therefore, the winding mode of the legs of the two lower anchor members with respect to the rod-shaped member is The load acting on the pair of lower anchor members from the fixed hooks is properly applied, as compared with the case where they are the same as each other or the case where the winding directions of all the legs around the rod-shaped members are the same. It is.

[0011]

According to a preferred aspect of the present invention, in the configuration of the first aspect, at least a pair of legs near the engaging portion of the lower anchor member are viewed in the lateral direction of the vehicle. It is configured to form a substantially V-shape that opens to the rear of the vehicle (preferred embodiment 1).

According to another preferred embodiment of the present invention, in the structure of the first aspect, the rod-shaped member has a substantially circular cross-sectional shape, and a pair of legs of each lower anchor member is provided. It is configured to be wound around a rod-shaped member over a range of 180 ° or more in cooperation with each other (preferred embodiment 2).

According to another preferred embodiment of the present invention, in the configuration of the preferred embodiment 2, the pair of legs of each lower anchor member is located on the opposite side of the rod-shaped member from the engaging portion. And is wound around the rod-shaped member in a state of extending to a common arc range around the rod-shaped member (preferred embodiment 3).

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a schematic structural view showing one embodiment of a lower anchor device for fixing a child seat according to the present invention, FIGS. 2 and 3 are enlarged perspective views showing main parts of the embodiment shown in FIG. 1, respectively. It is an expanded sectional view.

In these figures, reference numeral 10 denotes a child seat, and reference numeral 12 denotes a seat to which the child seat 10 is attached. A pair of ISO-FIX type fixed hooks 14 are provided at the lower end of the rear surface of the child seat 10.
L and 14R are fixedly provided. Fixed hook 1
4L and 14R are laterally spaced from each other and have grooves 16L and 16R that open rearward and extend substantially horizontally.

At the lower end of the seat back 18 of the seat 12, a rod-shaped member 20 is provided. The rod-shaped member 20 extends in the lateral direction of the vehicle and is fixed at both ends to a seat back frame (not shown). Have been. A pair of lower anchor members 22L and 22R formed of an elastic wire such as spring steel are fixed to the rod-shaped member 20 by welding or the like, and these lower anchor members are connected to the center of the fixing hooks 14L and 14R. They are spaced apart from each other in the lateral direction of the vehicle at the same center interval as the interval. The lower anchor members 22L and 22R are located between the lower end of the seat back 18 and the rear end of the main body 24 of the seat 12, and have a substantially U-shape that opens rearward when viewed from above. I have.

As shown in FIGS. 2 and 3, the lower anchor member 22L includes a pair of legs 22LA and 22LB.
And an engaging portion 22LC connecting these legs integrally and extending parallel to the rod-shaped member 20.
The tip of the 2LB extends in an arc around the rod 20. Similarly, the lower anchor member 22R includes a pair of legs 2
2RA and 22RB, and an engaging portion 22RC connecting these legs integrally and extending parallel to the rod-shaped member 20,
The distal ends of the legs 22RA and 22RB extend in an arc around the rod 20.

The engaging portions 22LC and 22RC fit into the grooves 16L and 16R of the fixing hooks 14L and 14R, respectively, whereby the fixing hooks 14L and 14R are detachably fixed to the lower anchor members 22L and 22R, respectively. However, the fixing hook is
And the structure itself detachably fixed to 22RC does not form the gist of the present invention, and the fixing hook may be configured to be fixed to the corresponding engaging portion in another manner.

In particular, in the illustrated embodiment, the legs 22
The tip of the LA is fixed to the rod 20 in a state of being wound around the rod 20 from the upper side over a range of 90 ° or more and less than 180 °, and the tip of the leg 22LB is rod-shaped from the lower side. The pair of legs 22LA and 22LB are fixed to the rod-shaped member 20 in a state where the pair of legs 22LA and 22LB are wound around a range of 90 ° or more and less than 180 ° around the rear of the vehicle. It has a V-shape that opens and projects forward or forward and slightly downward from the bar-shaped member 20.

Similarly, the tip of the leg 22RA is fixed to the rod 20 in a state of being wound around the rod 20 from the upper side over a range of 90 ° or more and less than 180 °,
The tip of the leg 22RB is fixed to the rod 20 in a state of being wound around the rod 20 from the lower side over a range of 90 ° or more and less than 180 °, whereby a pair of legs 22RA and 22RB is formed. Has a V-shape that opens rearward when viewed in the lateral direction of the vehicle and protrudes forward or forward and slightly upward from the bar-shaped member 20.

In manufacturing the lower anchor device constructed as described above, a pair of lower anchor members having the same size and shape as the rod-shaped member 20 are prepared, and the pair of lower anchor members are mirror images of each other with respect to each other. Are positioned with respect to the bar-shaped member 20 so that the arc-shaped tips of the legs are fixed to the bar-shaped member by welding or the like in this state.

In this case, the positioning of the pair of lower anchor members with respect to the rod member 20 is performed, for example, by fixing the two lower anchor members at a predetermined interval with a jig and inserting the rod members through the legs of the two lower anchor members. Or by spreading the pair of legs of each lower anchor member apart from each other by elastic deformation, and fitting a rod-shaped member between each pair of legs in that state. .

When the child seat 10 is fixed to the seat 12 by the lower anchor device constructed as described above, the child seat 10 is first moved rearward of the vehicle along the upper surface of the main body 24 of the seat 12 to thereby secure the fixing hook. The engaging portions 22 of the lower anchor members 22L and 22R are inserted into the grooves 16L and 16R of the 14L and 14R, respectively.
The LC and the 22RC are fitted, and thereafter the child seat 10 is fixed to the seat 12 by a seat belt or a dedicated belt not shown in the figure.

In the illustrated embodiment, when a force for vertically moving the child seat 10 relative to the seat 12 is exerted by, for example, bouncing or rebounding of the vehicle body, the lower anchor members 22L and 22R move up and down from the fixed hooks 14L and 14R. Load in the direction.

For example, the lower anchor members 22L and 22R
When the upper part receives a load upward from the fixing hooks 14L and 14R, the outer legs 22LA and 2LA with respect to the widthwise center of the sheet 12 of the lower anchor members 22L and 22R.
2RA receives an upward bending load and a compressive load, the inner legs 22LB and 22RB receive a downward bending load and a tensile load, and thus the two lower anchor members 22L and 22R receive loads symmetrically.

Similarly, the lower anchor members 22L and 22L
When R receives a downward load from the fixed hooks 14L and 14R, the outer legs 22LA and 22RA of the lower anchor members 22L and 22R with respect to the center in the width direction of the sheet 12 receive a downward bending load and a tensile load. The inner legs 22LB and 22RB are subjected to upward bending and compressive loads, so that the two lower anchor members 22L and 22R are also symmetrically loaded.

Therefore, according to the illustrated embodiment, the two lower anchor members 22 are shown in FIGS.
A structure in which the legs of L 'and 22R' are fixed to the bar-shaped member 20 'in the same manner but not symmetrically to each other,
As shown in FIGS. 6 and 7, all the legs of the two lower anchor members 22L "and 22R" are wound around the rod 20 "from above or below.
The child seat 10 can be more stably fixed to the seat 12 even at the time of bouncing or rebounding of the vehicle body, as compared with the structure fixed to the vehicle seat.

In the illustrated embodiment, as shown in FIG. 8, when a force F that causes the child seat 10 to fall in the vehicle lateral direction relative to the seat 12 due to a side collision of the vehicle or the like acts on the lower part. Anchor members 22L and 22R
One receives a load upward from the fixed hooks 14L and 14R, and the other lower anchor member receives a downward load.

For example, when the lower anchor member 22L receives an upward load and the lower anchor member 22R receives a downward load, the outer leg 22LA of the lower anchor member 22L receives an upward bending load and a compressive load. The inner leg 22LB receives an upward bending load and a tensile load, the outer leg 22RA of the lower anchor member 22R receives a downward bending load and a tensile load, and the inner leg 22LB.
The RB receives a downward bending load and a compressive load.

Conversely, when the lower anchor member 22L receives a downward load and the lower anchor member 22R receives an upward load, the outer legs 2L of the lower anchor member 22L may be used.
2LA receives a downward bending load and a tensile load, the inner leg 22LB receives a downward bending load and a compressive load, and the outer leg 22RA of the lower anchor member 22R receives an upward bending load and a compressive load. Leg 22R
B receives an upward bending load and a tensile load.

Therefore, in any case, if a tensile load is applied to one leg of each lower anchor member, a compressive load is applied to the other leg, so that the structure shown in FIGS. As compared with the case where a tensile load or a compressive load acts on any of the pair of legs of each lower anchor member,
The inclination of the child seat 10 with respect to the seat 12 can be reliably and effectively suppressed.

In the structure shown in FIGS. 4 and 5, when the leg 22LA 'of the lower anchor member 22L' receives a compressive load, the legs 22LB 'and 22RB'
Receives a tensile load, the leg 22RA 'receives a compressive load, and conversely, if the leg 22LA' of the lower anchor member 22L 'receives a tensile load, the legs 22LB' and 22LB '
RB 'receives a compressive load, and leg 22RA' receives a tensile load. Accordingly, the distance between the two legs receiving the tensile load and the distance between the two legs receiving the compressive load change depending on the direction of the force that causes the child seat 10 to fall down in the vehicle lateral direction relative to the seat 12.

On the other hand, according to the illustrated embodiment, when a tensile load acts on one leg of each lower anchor member, a compressive load acts on the other leg.
The distance between the two legs receiving the tensile load and the distance between the two legs receiving the compressive load are constant irrespective of the direction of the force F that causes the child seat 10 to fall in the lateral direction of the vehicle relative to the vehicle seat 2. 4 and 5 can effectively and surely carry the force to turn over the child seat 10 as compared with the structure shown in FIGS.

In the structure shown in FIGS. 6 and 7, the lower anchor members 22L "and 22R" are firmly fixed to the rod member 20 ", for example, by extending the rod member 20". In order that the tips of the two legs are wound over 180 ° or more when viewed along the existing direction, the tips of the legs are formed in an arc shape over 180 °. So that it must be curved.

On the other hand, according to the illustrated embodiment, the distal ends of the two legs of each lower anchor member are fixed to the rod-shaped member 20 while being wound from the upper side and the lower side.
As shown in FIG. 3, even if the range of the arc-shaped extending portion at the tip of each leg is less than 180 °, the rod-shaped member 20 is not required.
The extending range of the distal ends of the two legs when viewed along the extending direction of the lower anchor member is 180 ° or more, and therefore, the amount of bending of the distal ends of the two legs of each lower anchor member can be reduced. Also, the lower anchor member is formed into a rod-like member as compared with the structure shown in FIGS. 6 and 7 when the amount of bending at the tip of the two legs of each lower anchor member is the same. On the other hand, it can be firmly fixed.

Although the present invention has been described in detail with reference to specific embodiments, the present invention is not limited to the above-described embodiments, and various other embodiments may be included within the scope of the present invention. It will be clear to those skilled in the art that is possible.

For example, in the above-described embodiment, the lower anchor members 22L and 22R have a mirror image relationship with each other corresponding to the configuration of the second aspect, but the pair of lower anchor members are described above. As Comparative Example 1 in FIG.
And may be configured as shown in FIG.

In the above embodiment, the rod member 20 has a circular cross section, and the lower anchor members 22L and 22L
The tip of each leg of the 2R extends in an arc around the rod-shaped member 20, but the cross-sectional shape of the rod-shaped member 20 may be a shape other than a circle such as an ellipse. The distal end of each leg of the member may extend in a form other than an arc as long as it is at least partially wound around and fixed to the rod-shaped member.

In the above-described embodiment, the distal ends of the legs of the lower anchor members 22L and 22R extend in an arc around the rod member 20 within a range of 180 ° or less. The tip of each leg may extend over a range of 180 ° or more. In this case, for example, as shown in FIG. 9, the tip of each leg is close to the straight portion, or the tip of the arc-shaped portion of each leg overlaps with another arc-shaped portion and the rod-shaped member 20 When curved processing is performed so as to be adjacent to each other in the axial direction, the risk that the human body or clothing comes into contact with the tip of the arc-shaped portion of each leg is reliably reduced. Can be reliably reduced.

Further, in the above-described embodiment, the tip of the arc-shaped portion of each leg has an end face perpendicular to the extending direction. FIG.
As shown in FIG. 2, the thickness in the radial direction may be gradually reduced toward the tip, and even in such a configuration, the human body or clothes may be damaged by the tip of the arc-shaped portion of each leg. This can be reliably reduced.

[0042]

As is apparent from the above description, according to the structure of the first aspect of the present invention, each of the pair of legs partially winds the rod-shaped member from the upper side or the lower side. Compared to the case of the structure fixed to the rod-shaped member, the relative vertical movement of the fixed hook with respect to the rod-shaped member is surely suppressed, so that the child seat is greatly and effectively tilted or overturned. Can be prevented.

According to the first aspect of the invention, since the fixing method of the child seat is of the ISO-FIX type, the attachment and detachment of the child seat to and from the seat are different from those of the child seat fixing device described in the above-mentioned publication. Can be easily performed, and the fixing hook of the child seat can be the same structure as the conventional fixing hook of the ISO-FIX type. Therefore, it is possible to reliably avoid an increase in the number of parts of the child seat fixing device and a complicated structure. Can be.

According to the configuration of the second aspect, when the child seat moves up and down relatively to the seat, the pair of lower anchor members bear the load symmetrically in the left-right direction, and the child seat receives a force in the lateral overturning direction. Therefore, when loads in opposite directions are applied to the pair of lower anchor members in the vertical direction, a compressive load is applied to a pair of legs on the same side in the vehicle lateral direction of the two lower anchor members, and Since a tensile load is applied to the pair of legs, the winding mode of the legs of the two lower anchor members on the rod-shaped member is the same as each other, or the winding directions of all the legs on the rod-shaped member are the same. As compared with the above, the load acting on the pair of lower anchor members from the fixing hook can be appropriately carried, whereby the child seat can be stably fixed to the seat. .

According to the second aspect of the present invention, the two lower anchor members in which the winding directions of the tip portions of the pair of leg portions are opposite to each other are fixed to the rod-shaped member so as to have a mirror image relationship with each other. Since there is no need to prepare a pair of lower anchor members having different shapes, a lower anchor device capable of stably fixing the child seat to the seat as described above can be manufactured relatively inexpensively.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing one embodiment of a lower anchor device for fixing a child seat according to the present invention.

FIG. 2 is an enlarged perspective view showing a main part of the embodiment shown in FIG.

FIG. 3 is an enlarged sectional view showing a main part of the embodiment shown in FIG. 1;

FIG. 4 is an enlarged perspective view showing a lower anchor device as a first comparative example in which legs of a pair of lower anchor members are wound in the same manner.

FIG. 5 is an enlarged sectional view showing a main part of the comparative example shown in FIG.

FIG. 6 is an enlarged perspective view showing a lower anchor device as a second comparative example in which legs of a pair of lower anchor members are wound from the same side.

FIG. 7 is an enlarged sectional view showing a main part of the comparative example shown in FIG.

FIG. 8 shows a child seat 1 relative to the seat 12.
FIG. 5 is an explanatory diagram showing a situation in which a force that causes 0 to fall in the lateral direction of the vehicle acts.

FIG. 9 is an enlarged sectional view showing a main part of another embodiment of the lower anchor device for fixing a child seat according to the present invention.

FIG. 10 is an enlarged sectional view showing a main part of still another embodiment of the lower anchor device for fixing a child seat according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Child seat 12 ... Seat 14L, 14R ... Fixed hook 18 ... Seat back 20 ... Bar-shaped member 22L, 22R ... Lower anchor member 22LA, 22LB, 22RA, 22RB ... Leg 22LC, 22RC ... Engagement part

Claims (2)

[Claims] A lower anchor device for fixing a child seat to a seat in cooperation with a fixing hook attached to the child seat, a rod-shaped member fixed to the seat and extending substantially in a lateral direction of the vehicle, and a vehicle. A pair of lower anchor members spaced apart from each other in the lateral direction and fixed to the rod-shaped member, wherein each lower anchor member integrally connects the pair of legs and the pair of legs and is detachably attached to the fixing hook; And one of the pair of legs is fixed to the rod-shaped member in a manner to at least partially wind the rod-shaped member from above, and the other of the pair of legs is provided. The lower anchor device is fixed to the rod member in such a manner that the rod member is at least partially wound from below. 2. The lower anchor device according to claim 1, wherein a winding mode of the pair of lower anchor members with respect to the rod-shaped member is bilaterally symmetric with respect to each other.