JP7754763B2 - Anchor plate and vehicle seat - Google Patents

Description

The present invention relates to an anchor plate and a vehicle seat.

Patent Document 1 below discloses technology related to an anchor plate that includes a plate body (hereinafter referred to as the "anchor plate body") with an opening through which a bolt attached to the vehicle body or seat is inserted, and a spring plate (hereinafter referred to as the "leaf spring") attached to the anchor plate body.

In this prior art, the leaf spring has a pair of legs that overlap the side portions on either side of the opening and are fixed to the side portions with rivets, a tie portion that connects the pair of legs, and a guide lip that extends from the tie portion.

The opening formed in the anchor plate body has a large hole portion through which the bolt is inserted and a narrow hole portion connected to the large hole portion. The tie portion of the leaf spring is formed across the narrow hole portion, and the leaf spring's guide lip extends from the tie portion toward the large hole portion, and is formed so that it moves away from the anchor plate body as it extends toward the tip end of the extension direction.

In the prior art, with the above-described configuration, a bolt fixed to the vehicle body is inserted through the large hole in the anchor plate, and the anchor plate is then pulled up. This causes the bolt head to slide along the anchor plate body, and the bolt head comes into contact with the guide lip. Furthermore, when the anchor plate is pulled up, the tie portion elastically deforms in a direction away from the anchor plate body, and the bolt head enters between the tie portion and the anchor plate body.

This causes the bolt head to pass through the tie portion and move to the bottom end of the narrow hole. At this time, the tie portion returns to its original position, preventing the bolt head from moving back toward the large hole. This connects the anchor plate to the bolt so that it cannot be removed.

Japanese Patent Application Laid-Open No. 2018-127031

However, with the above-mentioned prior art, the leaf spring must be fixed to the anchor plate body via rivets, which is cumbersome, increases the number of steps required to assemble the anchor plate, and increases costs, including the material cost of the rivets.

The guide lip of the leaf spring extends from the tie portion toward the large hole portion, and is formed so that it moves away from the anchor plate body as it extends toward the tip of the extension. When attaching the anchor plate to a bolt fixed to the vehicle body, the tie portion is elastically deformed in a direction moving away from the anchor plate body, which causes the guide lip to move further away from the anchor plate body. As a result, the position where the anchor plate can be attached is limited in order to avoid interference with parts around the anchor plate.

In consideration of the above, the present invention aims to provide an anchor plate and a vehicle seat that alleviates restrictions on installation positions and prevents costs from increasing.

In order to solve the above problem, the anchor plate according to the invention described in claim 1 is an anchor plate that is provided on the outer side of a seat cushion on which an occupant sits in the vehicle width direction, and to which one end of a seat belt in the longitudinal direction is attached. The anchor plate has an insertion portion formed on the anchor plate body and through which the head of a bolt fastened to a bracket provided on the outer side of the seat cushion in the vehicle width direction can be inserted; a retaining portion formed on the anchor plate body and located on the opposite side of the insertion portion from the attachment portion to which the one end of the seat belt in the longitudinal direction is attached, the retaining portion being connected to the insertion portion and having a width dimension smaller than that of the insertion portion, and holding the neck of the bolt; and an elastic member that is directly fixed to the anchor plate body, protrudes toward the inside of the retaining portion, is elastically deformable along the width direction of the retaining portion, expands when the neck of the bolt passes through, and narrows after the neck of the bolt has passed, thereby restricting movement of the neck of the bolt in the direction of the insertion portion.

The anchor plate according to the invention described in claim 1 is provided on the outer side of the seat cushion on which an occupant sits in the vehicle width direction, and one end of the seat belt in the longitudinal direction is attached to it. The anchor plate is configured to include an insertion portion and a holding portion formed on the anchor plate body, and an elastic member is directly fixed to the anchor plate body.

The insertion portion is designed to allow the head of a bolt fastened to a bracket located on the outer side of the seat cushion in the vehicle width direction to be inserted therethrough, and the retaining portion is located on the opposite side of the insertion portion from the attachment portion to which one longitudinal end of the seat belt is attached, with the insertion portion in between. It is connected to the insertion portion and has a width smaller than that of the insertion portion, and retains the neck of the bolt.

The elastic member also protrudes toward the inside of the retaining portion and is elastically deformable along the width of the retaining portion. The elastic member widens when the neck of the bolt passes through, and narrows after the neck of the bolt has passed, restricting movement of the bolt neck toward the insertion portion.

In this way, in the present invention, the elastic member that allows or restricts bolt movement is fixed directly to the anchor plate body. This simplifies the installation of the elastic member compared to, for example, fixing the elastic member to the anchor plate body via fasteners such as rivets or screws. As a result, the present invention can reduce the number of steps required to assemble the anchor plate, enabling corresponding cost reductions, including the material costs of the fasteners.

In addition, in the present invention, the elastic member is elastically deformable along the width direction of the retaining portion. In other words, the elastic member is elastically deformable along the same plane as the anchor plate.

Generally, the anchor plate to which one end of the seat belt is attached is located on the lower side of the vehicle seat. For this reason, the anchor plate needs to be positioned so as not to interfere with parts around the lower side of the vehicle seat.

As a comparative example, if the elastic member elastically deforms along the thickness direction of the anchor plate, the position at which the anchor plate can be attached is limited to avoid interference with components around the lower side of the vehicle seat.

In contrast, in the present invention, the elastic member elastically deforms along the same plane as the anchor plate, which relaxes restrictions on the anchor plate's mounting position and increases the degree of freedom in the anchor plate's mounting position.

Furthermore, in the present invention, the elastic member is formed of a linear member.

In the present invention , the elastic member is formed of a linear member, and therefore, compared to a plate-like member such as a leaf spring, a linear member such as a wire can be more freely designed in shape.

The anchor plate according to the invention recited in claim 2 is the anchor plate according to the invention recited in claim 1 , wherein the elastic member is formed with a narrow portion that protrudes toward the inside of the retaining portion and expands when the neck of the bolt passes through.

In the anchor plate according to the invention of claim 2 , the elastic member is formed with a narrow portion that protrudes toward the inside of the retaining portion and is formed so as to widen along the width direction of the retaining portion when the neck of the bolt passes through. This widening of the wide portion allows the bolt to move from the insertion portion to the retaining portion.

Because the widened portion constitutes part of the elastic member, the narrowed portion, which widens along the width of the retaining portion when the neck of the bolt passes through, returns to its original width after the neck of the bolt has passed. This restricts the movement of the bolt held by the retaining portion from the retaining portion to the insertion portion.

Furthermore, by providing such narrow sections in the elastic member, reaction forces are generated above and below the narrow sections when the neck of the bolt passes through, thereby improving the rigidity of the elastic member.

The anchor plate according to the invention described in claim 3 is the anchor plate according to the invention described in claim 2 , wherein the narrow width portion includes a first R portion arranged on the insertion portion side and formed in a substantially arcuate shape, and a second R portion arranged on the holding portion side and formed in a substantially arcuate shape with a curvature larger than that of the first R portion.

In the anchor plate according to the invention of claim 3 , the narrow portion includes a first R portion and a second R portion. The first R portion is located on the insertion portion side and is formed in a substantially arc shape, and the second R portion is located on the holding portion side and is formed in an arc shape with a larger curvature than the first R portion.

The narrow section is designed to widen when the neck of the bolt passes through, and to restrict movement of the bolt from the holding section to the insertion section after the neck of the bolt has passed. For this reason, in the narrow section, the curvature of the first R section located on the insertion section side is different from the curvature of the second R section located on the holding section side.

When the neck of the bolt moves from the insertion portion to the holding portion (locking movement), a smaller curvature of the narrow portion makes it easier for the narrow portion to expand via the neck. On the other hand, when the neck of the bolt moves from the holding portion to the insertion portion (unlocking movement), a larger curvature of the narrow portion makes it more difficult for the narrow portion to expand than during locked movement. For this reason, in this invention, the second R portion located on the insertion portion side is formed with a larger curvature than the first R portion located on the holding portion side.

An anchor plate according to a fourth aspect of the present invention is the anchor plate according to the third aspect of the present invention, wherein the narrow portion has an inflection point with respect to at least the second R portion, connects the first R portion and the second R portion, and further includes a third R portion against which the neck of the bolt abuts when the neck passes through.

In the anchor plate according to the invention of claim 4 , the narrow portion further includes a third R portion against which the neck of the bolt abuts when the neck passes through. The third R portion has an inflection point with respect to at least the second R portion and connects the first R portion and the second R portion.

In this way, in the present invention, the third R section, which abuts against the neck of the bolt, has an inflection point relative to at least the second R section. As a result, when the elastic member expands, a reaction force is obtained from at least the second R section side, further improving the rigidity of the elastic member.

The anchor plate according to the invention recited in claim 5 is the anchor plate recited in any one of claims 1 to 4 , wherein the elastic member is formed with a fixing portion that is directly fixed to the anchor plate body.

In the anchor plate according to the invention described in claim 5 , a fixing portion is formed on the elastic member, and the elastic member is fixed directly to the anchor plate body via this fixing portion. Therefore, the installation of the elastic member can be simplified compared to, for example, when the elastic member is fixed to the anchor plate body via a fixing device such as a rivet or a screw.

The anchor plate according to a sixth aspect of the present invention is the anchor plate according to any one of the first to fifth aspects, wherein the elastic member is a first linear member formed of a linear member with ends, folded back at a central portion in the longitudinal direction of the linear member, and formed symmetrically with respect to a center line located at the center of the width direction of the anchor plate main body as an axis of symmetry, and the first linear member includes: a first fixing portion that is directly fixed to the anchor plate main body; a large diameter portion that is arranged on the insertion portion side and formed in a substantially arc-like shape along the shape of the insertion portion; a small diameter portion that is arranged on the retaining portion side and formed in a substantially arc-like shape with a diameter larger than the width dimension of the retaining portion and smaller than the insertion portion; and a first constricted portion that protrudes toward the inside of the retaining portion, connects the large diameter portion and the small diameter portion, and is formed with an inflection point with respect to the large diameter portion and the small diameter portion, with which the neck of the bolt abuts when the neck passes through.

In the anchor plate according to the invention of claim 6 , the elastic member is a first linear member formed of a linear member with ends, which is folded back at the longitudinal center of the first linear member and formed symmetrically with respect to the center line located at the widthwise center of the anchor plate body as the axis of symmetry.

The first linear member includes a first fixed portion, a large diameter portion, a small diameter portion, and a first constricted portion.

The first fixing portion is fixed directly to the anchor plate body, and the large diameter portion is located on the insertion portion side and is formed in a generally arc shape to match the shape of the insertion portion. The small diameter portion is located on the retaining portion side and is formed in a generally arc shape with a diameter larger than the width dimension of the retaining portion and smaller than the insertion portion. The first constricted portion protrudes toward the inside of the retaining portion. The first constricted portion connects the large diameter portion and the small diameter portion and is formed with an inflection point relative to the large diameter portion and the small diameter portion, against which the neck of the bolt abuts when passing through.

In this way, the first constricted portion, which abuts the neck of the bolt, has an inflection point relative to the large diameter portion and the small diameter portion. As a result, when the first linear member expands, a reaction force is generated from the large diameter portion and the small diameter portion, further improving the rigidity of the first linear member.

The anchor plate of the invention described in claim 7 is the anchor plate described in claim 6 , wherein the first fixing portion includes a pair of first engaging portions formed at both longitudinal ends of the first linear member and respectively engaging with a pair of first engaging holes formed in the anchor plate main body on the opposite side of the retaining portion with the insertion portion therebetween, and a second engaging portion formed in the longitudinal center of the first linear member, positioned opposite the pair of first engaging portions, and engaging with the lower end of the anchor plate main body.

In the anchor plate according to the seventh aspect of the present invention, the first fixing portion includes a pair of first and second engaging portions.

A pair of first engagement portions are formed at both longitudinal ends of the first linear member and engage with a pair of first engagement holes formed on the anchor plate body on the opposite side of the retaining portion, with the insertion portion between them. The second engagement portion is formed in the longitudinal center of the first linear member, is positioned opposite the pair of first engagement portions, and engages with the lower end of the anchor plate body.

In other words, in this invention, a pair of first and second engaging portions are provided with a first constricted portion between them that connects the large diameter portion and the small diameter portion, and the elastic member is directly fixed to the anchor plate body via this pair of first and second engaging portions.

In this way, by providing a pair of first and second engagement portions that secure the elastic member to the anchor plate body with the first constricted portion between them, it is possible to prevent the elastic member from shifting relative to the anchor plate body when the bolt neck passes through the first constricted portion.

The anchor plate according to the invention of claim 8 is the anchor plate according to claim 6 or claim 7 , wherein the first constricted portion further includes a first R portion that forms part of the large diameter portion, a second R portion that forms part of the small diameter portion, and a third R portion that has an inflection point with respect to the first R portion and the second R portion, connects the first R portion and the second R portion, and against which the neck of the bolt abuts when the neck passes through.

In the anchor plate according to the invention recited in claim 8 , the first constricted portion includes a first R portion, a second R portion, and a third R portion.

The first R section forms part of the large diameter section, and the second R section forms part of the small diameter section. The third R section has an inflection point relative to the first and second R sections, connecting the first and second R sections, and the neck of the bolt abuts against the third R section when it passes through.

The anchor plate according to a ninth aspect of the present invention is the anchor plate according to any one of the first to fifth aspects, wherein the elastic member is a second linear member formed of a linear member with ends, folded back at a central portion in the longitudinal direction of the linear member, and formed symmetrically with respect to a center line located at the center of the width direction of the anchor plate main body as an axis of symmetry, and the second linear member includes: a second fixing portion directly fixed to the anchor plate main body; a first arc portion arranged on the retaining portion side, formed in a substantially arc shape with a diameter larger than the width dimension of the retaining portion and smaller than the diameter of the insertion portion; a first outer shape portion provided radially outward of the first arc portion and forming the outer shape of the second linear member; and a second constricted portion that protrudes toward the inside of the retaining portion, connects the first arc portion and the first outer shape portion, and is formed with an inflection point with respect to the first arc portion, with which the neck of the bolt abuts when the neck passes through.

In the anchor plate according to the invention of claim 9 , the elastic member is a second linear member formed of a linear member with ends, which is folded back at the longitudinal center of the second linear member and formed symmetrically with respect to the center line located at the widthwise center of the anchor plate body as the axis of symmetry.

The second linear member includes a second fixing portion, a first arc portion, a first outer shape portion, and a second constricted portion.

The second fixing portion is fixed directly to the anchor plate body, and the first arc portion is located on the retaining portion side and is formed in a generally arc shape with a diameter larger than the width dimension of the retaining portion and smaller than the insertion portion. A first outer shape portion is provided radially outward of the first arc portion, and this first outer shape portion forms the outer shape of the second linear member. The second constricted portion protrudes toward the inside of the retaining portion. The second constricted portion also connects the first arc portion and the first outer shape portion. The second constricted portion is formed with an inflection point relative to the first arc portion, and the second constricted portion abuts against the neck of the bolt as it passes through.

In this way, the second constricted portion that abuts the neck of the bolt has an inflection point relative to the first arc portion. As a result, when the second linear member widens, a reaction force is generated from the first arc portion, further improving the rigidity of the second linear member.

The anchor plate according to the invention of claim 10 is the anchor plate of claim 9 , wherein the second fixing portion includes a pair of third engaging portions formed at both longitudinal ends of the second linear member and respectively engaging with a pair of second engaging holes formed at the lower end of the anchor plate main body, and a pair of fourth engaging portions formed continuously with the second constricted portion and respectively engaging with a pair of side end portions of the anchor plate main body located radially outside the first arc portion.

In the anchor plate according to the invention recited in claim 10 , the second fixing portion includes a pair of third engaging portions and a pair of fourth engaging portions.

A pair of third engagement portions are formed at both longitudinal ends of the second linear member and engage with a pair of second engagement holes formed at the lower end of the anchor plate body. Furthermore, the fourth engagement portion is formed contiguous with the second constricted portion and engages with a pair of side ends of the anchor plate body located radially outward of the first arc portion.

In other words, in the present invention, the second linear member is directly fixed to the anchor plate body via a pair of third engaging portions and a pair of fourth engaging portions. In this way, by providing a pair of third engaging portions and a pair of fourth engaging portions that fix the second linear member to the anchor plate body, it is possible to prevent the second linear member from shifting relative to the anchor plate body when the bolt neck passes through the second constricted portion.

The anchor plate according to an eleventh aspect of the present invention is the anchor plate according to any one of claims 1 to 5 , wherein the elastic member is a third linear member formed of an endless linear member and formed symmetrically with respect to a center line located at the center of the width direction of the anchor plate body as an axis of symmetry, and the third linear member includes: a second arc portion that is arranged on the retaining portion side and is formed in a substantially arc shape with a diameter larger than the width dimension of the retaining portion and smaller than the diameter of the insertion portion; a second outer shape portion that is arranged on the retaining portion side and is provided radially outward of the second arc portion and forms the outer shape of the third linear member; and a third constricted portion that protrudes toward the inside of the retaining portion, connects the second arc portion and the second outer shape portion, and is formed with an inflection point with respect to the second arc portion, with which the neck of the bolt abuts when the neck passes through.

In the anchor plate according to the invention described in claim 11 , the elastic member is a third linear member formed of an endless linear member, and is formed symmetrically with respect to the center line located at the center of the width direction of the anchor plate body as the axis of symmetry.

The third linear member includes a second arc portion, a second outer shape portion, and a third constricted portion.

The second arc portion is located on the retaining portion side and is formed in a generally arc-like shape with a diameter larger than the width dimension of the retaining portion and smaller than the insertion portion. The second outer portion is located radially outward of the second arc portion and forms the outer shape of the third linear member. The third constricted portion protrudes toward the inside of the retaining portion. The third constricted portion connects the second arc portion and the second outer portion and is formed with an inflection point relative to the second arc portion, against which the neck of the bolt abuts as it passes through.

In this way, the third constricted portion, which abuts the neck of the bolt, has an inflection point relative to the second arc portion. As a result, when the third linear member widens, a reaction force is obtained from the second arc portion, further improving the rigidity of the third linear member.

The anchor plate according to the invention of claim 12 is the anchor plate of claim 11 , wherein an accommodation portion is provided within the anchor plate body in which the second arc portion and the second outer shape portion are accommodated.

In the anchor plate according to the invention of claim 12 , a receiving portion is provided inside the anchor plate body, and the second arc portion and the second outer shape portion are received in the receiving portion.

In this way, by providing a housing that secures the third linear member to the anchor plate body, it is possible to prevent the third linear member from shifting relative to the anchor plate body when the neck of the bolt passes through the third constricted portion.

The anchor plate according to the invention of claim 13 is the anchor plate of claim 12 , wherein the anchor plate body includes a first plate that constitutes a part of the anchor plate body, a second plate that constitutes the other part of the anchor plate body and overlaps with the first plate to form the accommodating portion between the first plate, and a positioning portion that is formed within the accommodating portion and is inserted between the second arc portion and the second outer shape portion to position the third linear member.

In the anchor plate according to the invention recited in claim 13 , the anchor plate body includes a first plate, a second plate, and a positioning portion.

The first plate forms part of the anchor plate body, and the second plate forms the other part of the anchor plate body. When the first and second plates overlap, a storage section is formed between the first and second plates. A positioning section is formed within this storage section, and this positioning section is inserted between the second arc section and the second outer shape section, thereby positioning the third linear member relative to the anchor plate body.

A vehicle seat according to a fourteenth aspect of the present invention has one end of a seat belt in the longitudinal direction attached to the anchor plate according to any one of the first to thirteenth aspects.

In the vehicle seat according to the invention set forth in claim 14 , it is possible to enjoy the effects obtained by the anchor plate set forth in any one of claims 1 to 13 .

As described above, the present invention provides an anchor plate and vehicle seat that alleviates restrictions on the mounting position and prevents costs from increasing.

1 is a side view showing a vehicle seat to which an anchor plate according to an embodiment of the present invention is applied; 1 is an enlarged side view showing a main portion of a vehicle seat to which an anchor plate according to an embodiment of the present invention is applied; FIG. 2 is a front view of the anchor plate according to the first embodiment. FIG. 2 is a side view of the anchor plate according to the first embodiment. FIG. 2 is a perspective view of the anchor plate according to the first embodiment. FIG. 2 is an exploded perspective view of the anchor plate according to the first embodiment. FIG. 4 is a perspective view for explaining the function of the anchor plate according to the first embodiment. FIG. 4 is a front view for explaining the function of the anchor plate according to the first embodiment. FIG. 4 is a perspective view for explaining the function of the anchor plate according to the first embodiment. FIG. 10 is a front view of an anchor plate according to a second embodiment. FIG. 10 is a side view of the anchor plate according to the second embodiment. FIG. 10 is a perspective view of an anchor plate according to a second embodiment. FIG. 10 is an exploded perspective view of an anchor plate according to a second embodiment. FIG. 10 is a perspective view of the anchor plate according to the second embodiment, as viewed from the rear side. FIG. 10 is a perspective view for explaining the function of the anchor plate according to the second embodiment. FIG. 10 is a perspective view for explaining the function of the anchor plate according to the second embodiment. FIG. 11 is a front view of an anchor plate according to a third embodiment. FIG. 10 is a side view of the anchor plate according to the third embodiment. FIG. 10 is a perspective view of an anchor plate according to a third embodiment. FIG. 11 is an exploded perspective view of an anchor plate according to a third embodiment. FIG. 11 is a perspective view for explaining the function of the anchor plate according to the third embodiment. FIG. 11 is a perspective view for explaining the function of the anchor plate according to the third embodiment.

The following describes a vehicle seat according to an embodiment of the present invention, using the drawings. Note that the arrow FR, shown as appropriate in the following drawings, indicates the forward direction in the longitudinal direction of the vehicle (the direction in which the seated person faces), the arrow UP indicates the upward direction in the vertical direction of the vehicle, and the arrow RH indicates the rightward direction in the width direction of the vehicle. Hereinafter, when the terms "front-rear," "up-down," and "left-right" are used in explanations, they refer to the front-rear direction of the seat, the up-down direction of the seat, and the left-right direction in the width direction of the seat when facing the direction of travel of the vehicle, unless otherwise specified.

<Configuration of vehicle seat>
First, the configuration of the vehicle seat according to this embodiment will be described.

As shown in FIG. 1, the vehicle seat 10 according to this embodiment includes a seat cushion 12 on which an occupant sits, and a seat back 14 whose lower end is connected to the rear end of the seat cushion 12 to support the upper body of the occupant, and a headrest 16 is attached to the upper end of the seat back 14.

Here, the seat cushion 12 includes a seat cushion frame (not shown) that serves as a skeletal member and is generally rectangular in plan view. A seat cushion pad 18 is provided on the upper surface of the seat cushion frame, and the surface of the seat cushion pad 18 is covered with a seat cushion skin 20.

On the other hand, the seat back 14 is equipped with a seat back frame (not shown) that serves as a skeletal member and is generally rectangular in front view. Similar to the seat cushion 12, a seat back pad 22 is provided on the front side of the seat back frame, and the surface of the seat back pad 22 is covered with a seat back skin 24.

The lower end of the seatback frame is rotatably connected to the rear end of the seat cushion frame via a reclining mechanism 26. The reclining mechanism 26 is equipped with a reclining lever 28, and by rotating this reclining lever 28, the seatback 14 can be reclined relative to the seat cushion 12.

The vehicle seat 10 also has a pair of left and right slide rails 30 below the seat cushion 12, which allow the vehicle seat 10 to move in the fore-and-aft direction of the vehicle. Each of the pair of left and right slide rails 30 has a lower rail 32 and an upper rail 34.

The lower rail 32 is arranged with its longitudinal direction aligned in the front-to-rear direction, and mounting brackets (not shown) are attached to the front and rear ends of the lower rail 32, with the lower rail 32 being fixed to the vehicle floor (not shown) via the mounting brackets.

The upper rail 34 is arranged with its longitudinal direction aligned with the front-to-rear direction and is supported so as to be slidable longitudinally relative to the lower rail 32. However, a slide lock mechanism (not shown) normally restricts the upper rail 34 from sliding relative to the lower rail 32, and operating the lock release lever 36 releases the slide restriction imposed by the slide lock mechanism.

As shown in FIG. 2, an anchor bracket (bracket) 38 is fixed to the upper surface of the rear of the upper rail 34, which is located on the left side of the vehicle seat 10 (outside in the vehicle width direction). This anchor bracket 38 is formed to match the width dimension of the slide rail 30, and when cut along the width direction of the slide rail 30 (vehicle width direction), its cross section has a substantially U-shape.

A bolt 40 is fastened to the anchor bracket 38, and an anchor plate 44 (described below) is fixed via the bolt 40 to which one end 42A of a seat belt 42 (in the longitudinal direction) that constitutes the three-point seat belt device is attached.

The anchor plate 44 is a rectangular plate with its longitudinal direction aligned with the vertical direction of the seat. The upper end 44A of the anchor plate 44 has a rectangular mounting hole (mounting portion) 46 formed therein, with its longitudinal direction aligned with the width direction of the anchor plate 44. One end 42A of the seat belt 42 is inserted into this mounting hole 46 and sewn in a state where it is folded back toward the inside of the seat width direction.

Note that the mounting holes 46 are not shown in Figures 3 to 22 because they are not related to the main parts of the anchor plate 44 described in Figures 3 to 9, the anchor plate 100 described in Figures 10 to 16, or the anchor plate 200 described in Figures 17 to 22.

On the other hand, a seat belt stay (not shown) is arranged on the right side (inner side in the vehicle width direction) of the vehicle seat 10, and a tongue plate attached to the seat belt 42 is connected to a buckle fixed to the upper end of the seat belt stay. An occupant seated on the seat cushion 12 is restrained by the seat belt 42 by connecting the tongue plate to the buckle.

(First embodiment)
The anchor plate 44 according to the first embodiment will now be described with reference to FIGS.

As shown in Figures 3 to 6, the anchor plate 44 is composed of, for example, a rectangular anchor plate body 50 made of sheet metal with its longitudinal direction aligned with the vertical direction of the seat, and a wire member (first linear member, elastic member) 52 made of piano wire. It is preferable to coat the wire member 52 with silicone, fluorine, or the like to suppress abnormal noise caused by metal-to-metal contact.

The anchor plate body 50 is composed of an insertion portion 54 and a retaining portion 56. The insertion portion 54 is formed in approximately the center of the anchor plate body 50, allowing the head portion 40A of the bolt 40 to be inserted therethrough. The retaining portion 56 is formed below the insertion portion 54 and in the center of the anchor plate body 50 in the width direction, allowing the neck portion 40B of the bolt 40 to be retained therethrough.

The insertion portion 54 is arc-shaped, and is connected to the retaining portion 56. The retaining portion 56 is an elongated hole formed along the vertical direction of the anchor plate body 50, and the width dimension (D1) of the retaining portion 56 is set to be smaller than the inner diameter dimension (D2) of the insertion portion 54.

Furthermore, a rectangular fixing hole 58 is formed on the upper side of the insertion portion 54 (below the mounting hole 46 (see Figure 2)), with its longitudinal direction aligned with the width direction of the anchor plate body 50. A pair of engagement holes (first engagement holes) 60 are formed at the upper ends of a pair of side walls 58A of the fixing hole 58, extending along the width direction of the anchor plate body 50.

The pair of engagement holes 60 are formed to match the wire diameter of the wire member 52, and a pair of engagement portions (first fixing portions) 62 provided at both longitudinal ends of the wire member 52 can be engaged with the pair of engagement holes 60 (described below).

Now, we will explain the wire member 52.

The wire member 52 is formed symmetrically in the front view shown in Figure 3, and is provided on the outer surface 51 (the outer surface in the vehicle width direction) of the anchor plate main body 50 as shown in Figures 4 and 5. Note that because the wire member 52 is formed symmetrically in the front view, symbols may be assigned to the left or right sides if the lead-out wires are complicated.

As shown in Figures 3 and 6, the wire member 52 is configured to include a large diameter portion 64, a small diameter portion 66, and a fixing portion (first fixing portion) 68.

The large diameter portion 64 is formed in a generally arc-like shape, approximately concentric with and outside the insertion portion 54 formed in the anchor plate body 50. The small diameter portion 66 is formed in a generally arc-like shape outside the retaining portion 56, with a diameter dimension larger than the width dimension (D1) of the retaining portion 56 formed in the anchor plate body 50 and smaller than the inner diameter dimension (D2) of the insertion portion 54.

A constricted portion (first constricted portion, narrow portion) 70 is provided between the small diameter portion 66 and the large diameter portion 64, and this constricted portion 70 forms a continuous connection between the large diameter portion 64 and the small diameter portion 66. The constricted portion 70 protrudes toward the inside of the holding portion 56 and is elastically deformable along the width direction of the holding portion 56.

As shown by the two-dot chain line in Figure 8, the constricted portion 70 widens when the neck 40B of the bolt 40 passes through, and after the neck 40B of the bolt 40 has passed, it narrows as shown by the solid line, thereby restricting movement of the neck 40B of the bolt 40 in the direction of the insertion portion 54.

As shown in Figure 3, the constricted portion 70 is composed of a first R portion 72, a second R portion 74, and a third R portion 76.

The first R portion 72 is formed in a generally arcuate shape as part of the large diameter portion 64, while the second R portion 74 is formed in a generally arcuate shape as part of the small diameter portion 66 with a larger curvature than the first R portion 72. The third R portion 76 has an inflection point P relative to the first R portion 72 and the second R portion 74, connecting them in a generally arcuate shape, and as shown in Figure 8, the neck portion 40B of the bolt 40 abuts against it when it passes through.

In this embodiment, as shown in Figures 5 and 6, the wire member 52 is directly fixed to the anchor plate body 50 by the fixing portion 68. As described above, the fixing portion 68 has a pair of engagement portions (first engagement portions) 62 that respectively engage with the pair of engagement holes 60.

On the other hand, the wire member 52 is provided on the outer surface 51 side of the anchor plate body 50. Therefore, on the side of the pair of engaging portions 62 of the wire member 52, there is a bent portion 78 that bends from the outer surface 51 of the anchor plate body 50 toward the inside of the fixing hole 58, and bent portions 80, 82 that bend toward the pair of engaging holes 60 formed within the fixing hole 58.

The longitudinal center of the wire member 52 is a folded portion 84, and the wire member 52 is formed symmetrically with the center line Q (see Figure 3) located at the center of the anchor plate body 50 in the width direction as the axis of symmetry, starting from the folded portion 84.

An engagement portion (first fixing portion) 86 is provided in the longitudinal center of the wire member 52. This engagement portion 86 is formed to clamp the lower end portion 50B of the anchor plate main body 50 from the outer surface 51 of the anchor plate main body 50 toward the inner surface (the inner surface in the vehicle width direction) 53 (see Figure 4).

With the above configuration, for example, the engaging portion 86 of the wire member 52 is engaged with the lower end portion 50B of the anchor plate main body 50, and the pair of engaging portions 62 of the wire member 52 are engaged with the pair of engaging holes 60 formed in the fixing hole 58. This secures the wire member 52 to the anchor plate main body 50.

(Action and effect)
Next, the operation and effect of the anchor plate 44 according to the first embodiment will be described.

As shown in Figure 7, in this embodiment, the head 40A of the bolt 40 fastened to the anchor bracket 38 (see Figure 2) is inserted into the insertion portion 54 of the anchor plate 44 (anchor plate body 50). When the anchor plate 44 abuts against the washer 88 provided on the bolt 40, the anchor plate 44 is pulled upward. This causes the neck 40B of the bolt 40 to move (relatively) toward the retaining portion 56, as shown in Figure 9.

Here, the wire member 52 is directly fixed to the anchor plate 44, and when the neck portion 40B of the bolt 40 moves (relatively) toward the retaining portion 56, the neck portion 40B of the bolt 40 moves from the large diameter portion 64 of the wire member 52 toward the small diameter portion 66 (see Figure 8). At this time, the neck portion 40B passes through the constricted portion 70 connecting the large diameter portion 64 and the small diameter portion 66.

As shown in Figure 8, the constricted portion 70 juts out toward the inside of the retaining portion 56 and is elastically deformable along the width direction of the retaining portion 56. When the neck 40B of the bolt 40 passes through the constricted portion 70, it widens as shown by the two-dot chain line, and narrows as shown by the solid line after the neck 40B of the bolt 40 has passed, thereby restricting movement of the neck 40B of the bolt 40 toward the insertion portion 54.

In this way, in this embodiment, the wire member 52, which allows or restricts movement of the bolt 40, is fixed directly to the anchor plate body 50. Therefore, compared to, for example, cases in which an elastic member is fixed to the anchor plate body via fasteners such as rivets or screws (not shown), this embodiment simplifies the installation of the wire member 52.

As a result, in this embodiment, the number of steps required to assemble the anchor plate 44 can be reduced, resulting in corresponding cost savings, including the material costs for the fasteners. Furthermore, by using the wire member 52 as the elastic member, the shape can be more freely designed compared to plate-shaped members such as leaf springs.

In this embodiment, the wire member 52 is directly fixed to the anchor plate body 50 by a pair of engaging portions 62 and 86. The pair of engaging portions 62 respectively engage with a pair of engaging holes 60 formed in the upper end portion 50A of the anchor plate body 50, and the engaging portion 86 clamps the lower end portion 50B of the anchor plate body 50. This fixes the wire member 52 to the anchor plate body 50. A constricted portion 70 is provided between the pair of engaging portions 62 and 86.

In this way, in this embodiment, by providing a pair of engaging portions 62 and 86 that secure the wire member 52 to the anchor plate main body 50 with the constricted portion 70 between them, it is possible to prevent the wire member 52 from shifting relative to the anchor plate main body 50 when the neck portion 40B of the bolt 40 passes through the constricted portion 70.

In addition, in this embodiment, as shown in Figures 5 and 6, the wire member 52 is provided on the outer surface 51 side of the anchor plate main body 50, and on the pair of engagement portions 62 side, there is provided a bent portion 78 that bends from the outer surface 51 of the anchor plate main body 50 toward the fixing hole 58, and bent portions 80, 82 that bend toward the pair of engagement holes 60 formed within the fixing hole 58.

In this way, the pair of engaging portions 62 are engaged with the pair of engaging holes 60 in the fixing hole 58 from the outer surface 51 side of the anchor plate body 50 via the bent portions 78, 80, and 82, respectively, making them less likely to come off the pair of engaging holes 60. Furthermore, by engaging the pair of engaging portions 62 with the pair of engaging holes 60 while elastic energy is stored, the pair of engaging portions 62 become even more difficult to come off.

In this embodiment, as shown in FIG. 3, the constricted portion 70 includes a first R portion 72, a second R portion 74, and a third R portion 76. The first R portion 72 is formed in a generally arcuate shape as part of the large diameter portion 64, centered inside the insertion portion 54, while the second R portion 74 is formed in a generally arcuate shape with a greater curvature than the first R portion 72, and is part of the small diameter portion 66, centered on the holding portion 56 side.

As shown in Figure 8, the constricted portion 70 is configured to widen when the neck 40B of the bolt 40 passes through, and then return to its original shape after the neck 40B of the bolt 40 has passed, restricting movement of the bolt 40 from the retaining portion 56 to the insertion portion 54. For this reason, in this embodiment, the curvature of the first R portion 72 formed on the large diameter portion 64 side of the constricted portion 70 is configured to be smaller than the curvature of the second R portion 74 formed on the small diameter portion 66 side.

As a result, in this embodiment, when the neck portion 40B of the bolt 40 moves from the insertion portion 54 to the retaining portion 56 (locking movement), the neck portion 40B makes it easier for the neck portion 70 to widen. On the other hand, when the neck portion 40B of the bolt 40 moves from the retaining portion 56 to the insertion portion 54 (unlocking movement), the neck portion 70 is more difficult to widen than during the locking movement.

In this embodiment, by providing such a constricted portion 70 in the wire member 52, when the neck portion 40B of the bolt 40 passes through the constricted portion 70, a reaction force is generated above and below the constricted portion 70, thereby improving the rigidity of the wire member 52.

Furthermore, the third R portion 76 is contacted by the neck portion 40B of the bolt 40 when the neck portion 40B passes through. The third R portion 76 has an inflection point P (see Figure 3) relative to the first R portion 72 and the second R portion 74, connecting the first R portion 72 and the second R portion 74 in a substantially arc shape.

In this way, the third R portion 76, which abuts the neck portion 40B of the bolt 40, has an inflection point P relative to the first R portion 72 and the second R portion 74. As a result, when the wire member 52 is widened, a reaction force is generated from the insertion portion 54 via the first R portion 72 and the retaining portion 56 via the second R portion 74, further improving the rigidity of the wire member 52.

In addition, in this embodiment, the wire member 52 is elastically deformable along the width direction of the retaining portion 56. In other words, the wire member 52 is elastically deformable along the same plane as the anchor plate 44.

Generally, as shown in FIG. 2, the anchor plate 44 to which one end 42A of the seat belt 42 is attached is provided on the lower side of the vehicle seat 10. For this reason, the anchor plate 44 needs to be positioned so as not to interfere with parts around the lower side of the vehicle seat 10.

As a comparative example (not shown), for example, if the elastic member elastically deforms along the thickness direction of the anchor plate, the position at which the anchor plate can be attached is limited to avoid interference with components around the lower side of the vehicle seat.

In contrast, in this embodiment, as shown in FIG. 8, the wire member 52 elastically deforms along the same plane as the anchor plate 44, thereby avoiding interference with components around the lower side of the vehicle seat 10 (see FIG. 2). As a result, in this embodiment, restrictions on the mounting position of the anchor plate 44 are relaxed, improving the degree of freedom in the mounting position of the anchor plate 44.

As described above, this embodiment provides an anchor plate 44 that alleviates restrictions on the mounting position and helps prevent increases in costs.

Second Embodiment
Next, an anchor plate 100 according to a second embodiment will be described with reference to Figures 10 to 16. Note that in the anchor plate 100 according to the second embodiment, components that are substantially the same as those in the anchor plate 44 according to the first embodiment (Figure 6) are designated by the same reference numerals, and descriptions thereof will be omitted.

As shown in Figures 10 to 14, the anchor plate 100 is composed of an anchor plate main body 102 and a wire member (second linear member, elastic member) 104.

As shown in Figure 10, the anchor plate body 102 is composed of an insertion portion 54 and a holding portion 56, and a generally U-shaped notch portion 106 is formed at the lower end portion 102A of the anchor plate body 102, with the lower side of the anchor plate body 102 opening.

A pair of engagement holes (second engagement holes) 108 are formed in each of the pair of side walls 106A of the cutout portion 106 along the width direction of the anchor plate body 102. A pair of engagement portions (second fixing portions) 110 provided at both longitudinal ends of the wire member 104 engage with each of the pair of engagement holes 108.

Now, we will explain the wire member 104.

The wire member 104 is formed symmetrically in the front view shown in Figure 10, and is provided on the outer surface 103 (the outer surface in the vehicle width direction) of the anchor plate main body 102, as shown in Figures 11 and 12.

As shown in Figures 10, 12, and 13, the wire member 104 is configured to include a fixed portion (second fixed portion) 112, an arc portion (first arc portion) 114, and a constricted portion (second constricted portion, narrow portion) 116.

The fixing portion 112 is composed of a pair of engaging portions (third engaging portions) 110 engaged with the lower end portion 102A of the anchor plate body 102, and a pair of engaging portions (fourth engaging portions) 113 fixed to both widthwise ends of the anchor plate body 102. The wire member 104 is directly fixed to the anchor plate body 102 by the pair of engaging portions 110 and the pair of engaging portions 113.

The arc portion 114 is positioned on the retaining portion 56 side and is formed in a generally arc shape with a diameter larger than the width dimension (D1) of the retaining portion 56 and smaller than the inner diameter dimension (D2) of the insertion portion 54. A pair of engagement portions 110 are formed below the arc portion 114.

The constricted portion 116 is disposed on the retaining portion 56 side, positioned above the arc portion 114 and formed contiguous with the arc portion 114. The constricted portion 116 and the upper portion of the engaging portion 113 are each connected by a straight portion (first outer shape portion) 118. The pair of straight portions 118 incline downwards on the anchor plate body 102 as they extend outward in the width direction of the anchor plate body 102, and the engaging portion 113 and the arc portion 114 are formed substantially opposite each other.

Furthermore, a pair of linear portions (first outer shape portions) 120 formed symmetrically above and below the pair of linear portions 118 are connected to the lower portion of the engagement portion 113, and the lower ends of the linear portions 120 are connected by linear portion 122 along the lower end of the anchor plate body 102.

The constricted portion 116 protrudes toward the inside of the retaining portion 56 and is elastically deformable along the width direction of the retaining portion 56. As shown in FIG. 15, the constricted portion 116 widens when the neck 40B of the bolt 40 passes through, and as shown in FIG. 16, it narrows after the neck 40B of the bolt 40 has passed, thereby restricting movement of the neck 40B of the bolt 40 toward the insertion portion 54.

Here, as shown in Figure 10, the constricted portion 116 is composed of a first R portion 124, a second R portion 126, and a third R portion 128.

The first R portion 124 is formed to be connected to the straight portion 118, and the second R portion 126 is formed as a part of the arc portion 114 in a generally arc shape with a greater curvature than the first R portion 124. The third R portion 128 is connected to the first R portion 124 in a generally arc shape with an inflection point P relative to the second R portion 126, and as shown in Figures 15 and 16, the neck portion 40B of the bolt 40 abuts against it as it passes through.

In this way, the constricted portion 116 that abuts the neck portion 40B of the bolt 40 has an inflection point P (see Figure 10) with respect to the arc portion 114, so that when the wire member 104 widens, a reaction force is obtained from the arc portion 114, further improving the rigidity of the wire member 104.

In addition, in this embodiment, the wire member 104 is directly fixed to the lower end portion 102A of the anchor plate body 102 and both widthwise ends of the anchor plate body 102 by a pair of engaging portions 110 and a pair of engaging portions 113. As a result, in this embodiment, the wire member 104 can be prevented from shifting relative to the anchor plate body 102 when the neck portion 40B of the bolt 40 passes through the constricted portion 70.

(Third embodiment)
Next, an anchor plate 200 according to a third embodiment will be described with reference to Figures 17 to 22. Note that in the anchor plate 200 according to the third embodiment, components that are substantially the same as those in the anchor plate 44 according to the first embodiment (Figure 6) are designated by the same reference numerals, and descriptions thereof will be omitted.

As shown in Figures 17 to 20, the anchor plate 200 is composed of an anchor plate main body 202 and a wire member (third linear member, elastic member) 204, and the anchor plate main body 202 is formed with an insertion portion 54 and a holding portion 56.

As shown in Figure 20, the anchor plate body 202 in this embodiment is composed of a first plate 206 and a second plate 208. The first plate 206 and the second plate 208 are overlapped in the thickness direction and secured with screws 210 at both widthwise ends and at the center in the up-down direction.

A recess 212 is provided in the lower part of the second plate 208, recessed along the plate thickness direction, and the wire member 204 can be accommodated in this recess 212. With the wire member 204 accommodated in this recess 212, the wire member 204 is fixed to the anchor plate main body 202.

Now, we will explain the wire member 204.

The wire member 204 is formed symmetrically in the front view shown in Figure 17, and is housed inside the anchor plate body 202 as shown in Figures 18 and 19.

As shown in Figures 17, 19, and 20, the wire member 204 is configured to include an arc portion 214, an outer portion (second outer portion) 216, and a constricted portion (third constricted portion, narrow portion) 218.

The arc portion 214 is positioned on the holding portion 56 side and is formed in a generally arc shape with a diameter larger than the width dimension (D1) of the holding portion 56 and smaller than the inner diameter dimension (D2) of the insertion portion 54. The outer portion 216 is positioned on the holding portion 56 side and is provided radially outward of the arc portion (second arc portion) 214, forming the outer shape of the wire member 204.

The constricted portion 218 is located on the retaining portion 56 side, is continuous with the arc portion 214, and is formed with an inflection point P relative to the arc portion 214, against which the neck portion 40B of the bolt 40 abuts when it passes through.

Furthermore, the constricted portion 218 protrudes toward the inside of the retaining portion 56 and is elastically deformable along the width direction of the retaining portion 56. As shown in Figures 21 and 22, the constricted portion 218 widens when the neck 40B of the bolt 40 passes through, and narrows after the neck 40B of the bolt 40 has passed, thereby restricting movement of the neck 40B of the bolt 40 toward the insertion portion 54.

Furthermore, as shown in FIG. 17, the constricted portion 218 is configured to include a first R portion 220, a second R portion 222, and a third R portion 224.

The first R portion 220 is part of the outer shape portion 216, and the second R portion 222 is formed as part of the arc portion 214 in a generally arc shape with a greater curvature than the first R portion 220. The third R portion 224 is connected to the second R portion 222 in a generally arc shape with an inflection point P relative to the second R portion 222, and as shown in Figures 21 and 22, the neck portion 40B of the bolt 40 abuts against it when the neck portion 40B passes through.

In this way, the constricted portion 218, which abuts the neck portion 40B of the bolt 40, has an inflection point P (see Figure 17) with respect to the arc portion 214. As a result, when the wire member 204 widens, a reaction force is obtained from the arc portion 214, further improving the rigidity of the wire member 204.

On the other hand, as shown in Figures 17, 19, and 20, the accommodating portion 212 is formed to follow the outer shape of the wire member 204, and a positioning portion 226 is protruded from the lower part of the accommodating portion 212 and formed to follow the outer shape of the wire member 204 on the inside of the accommodating portion 212. This positioning portion 226 is positioned between the arc portion 214 and the outer shape portion 216 of the wire member 204. This positions the wire member 204 relative to the anchor plate main body 202.

In this way, by providing a housing portion 212 that positions and fixes the wire member 204 relative to the anchor plate body 202, it is possible to prevent the wire member 204 from shifting relative to the anchor plate body 202 when the neck portion 40B of the bolt 40 passes through the constricted portion 218.

The present invention can be modified and implemented in various ways without departing from its spirit. It goes without saying that the scope of the present invention is not limited to the above-described embodiment.

10 Vehicle seat 12 Seat cushion 38 Anchor bracket (bracket)
40 Bolt 40A Head 40B Neck 42 Seat belt 42A One end (one end in the longitudinal direction of the seat belt)
44 Anchor plate 46 Mounting hole 50 Anchor plate body 52 Wire member (first linear member, elastic member)
54 Insertion portion 56 Holding portion 60 Engagement hole (first engagement hole)
62 Engaging part (first engaging part, first fixing part)
64 Large diameter portion (first linear member)
66 Small diameter portion (first linear member)
68 Fixed portion (first fixed portion, first linear member)
70 First constricted portion (first linear member, narrow portion)
72 First R portion (first constricted portion, narrow width portion)
74 Second R portion (first constricted portion, narrow width portion)
76 Third R portion (first constricted portion, narrow width portion)
86 Engaging part (second engaging part, first fixing part)
100 Anchor plate 102 Anchor plate body 104 Wire member (second linear member, elastic member)
108 Engagement hole (second engagement hole)
110 Engaging part (third engaging part, second fixing part)
112 Fixed portion (second fixed portion, second linear member)
113 Engaging part (fourth engaging part, second fixing part)
114 Arc portion (first arc portion, second linear member)
116 Second constricted portion (second linear member, narrow portion)
118 Straight portion (first outer portion, second linear member)
120 Straight portion (first outer portion, second linear member)
124 First R section (narrow width section)
126 2nd R section (narrow width section)
128 3rd R section (narrow width section)
200 Anchor plate 202 Anchor plate body 204 Wire member (third linear member, elastic member)
206 First plate (anchor plate body)
208 Second plate (anchor plate body)
212 Storage portion 214 Arc portion (second arc portion, third linear member)
216 Outer portion (second outer portion, third linear member)
218 Third constricted portion (third linear member, narrow portion)
220 First R section (narrow width section)
222 2nd R section (narrow width section)
224 3rd R section (narrow width section)
226 Positioning portion (anchor plate body)
P Inflection point Q Center line

Claims (14)

An anchor plate provided on the outer side of a seat cushion on which an occupant sits in the vehicle width direction and to which one end of a seat belt in the longitudinal direction is attached,
an insertion portion formed in an anchor plate body, into which a head of a bolt fastened to a bracket provided on an outer side of the seat cushion in the vehicle width direction can be inserted;
a retaining portion formed on the anchor plate body, the retaining portion being provided on the opposite side of the attachment portion to which one end of the seat belt in the longitudinal direction is attached, with the insertion portion therebetween, the retaining portion being connected to the insertion portion and having a width dimension smaller than that of the insertion portion, and retaining a neck portion of the bolt;
an elastic member that is directly fixed to the anchor plate body, protrudes toward the inside of the holding portion, is elastically deformable along the width direction of the holding portion, expands when the neck of the bolt passes through, and narrows after the neck of the bolt passes through, thereby restricting movement of the neck of the bolt toward the insertion portion;
Equipped with
The elastic member is an anchor plate formed of a linear member . 2. The anchor plate according to claim 1 , wherein the elastic member is formed with a narrow portion that protrudes toward the inside of the holding portion and expands in width when the neck of the bolt passes through . The narrow width portion is
a first R portion disposed on the insertion portion side and formed in a substantially arc shape;
a second R portion disposed on the holding portion side and formed in a substantially arc shape with a curvature larger than that of the first R portion;
The anchor plate according to claim 2 , comprising : 4. The anchor plate according to claim 3, wherein the narrow width portion has an inflection point with respect to at least the second R portion, connects the first R portion and the second R portion, and further includes a third R portion with which the neck of the bolt abuts when the neck passes through . The anchor plate according to any one of claims 1 to 4, wherein the elastic member is formed with a fixing portion that is directly fixed to the anchor plate body . the elastic member is a first linear member formed of a linear member having ends, folded back at a central portion in a longitudinal direction of the linear member, and formed symmetrically with respect to a center line located at the center in a width direction of the anchor plate body as an axis of symmetry,
The first linear member is
a first fixing portion directly fixed to the anchor plate body;
a large diameter portion disposed on the insertion portion side and formed in a substantially arc shape along the shape of the insertion portion;
a small diameter portion disposed on the holding portion side, the small diameter portion having a diameter larger than the width dimension of the holding portion and smaller than the insertion portion, and formed in a substantially arc shape;
a first constricted portion that protrudes toward the inside of the retaining portion, connects the large diameter portion and the small diameter portion, and is formed to have an inflection point with respect to the large diameter portion and the small diameter portion, against which the neck portion of the bolt abuts when the neck portion passes through;
The anchor plate according to any one of claims 1 to 5 , comprising : The first fixing portion is
a pair of first engaging portions formed at both longitudinal ends of the first linear member and respectively engaged with a pair of first engaging holes formed on the anchor plate main body on the opposite side of the holding portion with the insertion portion therebetween;
a second engaging portion formed in a longitudinal center portion of the first linear member, disposed on an opposite side of the pair of first engaging portions, and engaged with a lower end portion of the anchor plate body;
The anchor plate according to claim 6 , comprising: The first constricted portion is
a first R portion forming a part of the large diameter portion;
a second R portion forming a part of the small diameter portion;
a third R portion that has an inflection point with respect to the first R portion and the second R portion, connects the first R portion and the second R portion, and against which the neck portion of the bolt abuts when the neck portion passes through;
The anchor plate according to claim 6 or 7 , comprising: the elastic member is a second linear member formed of a linear member having ends, folded back at a central portion in a longitudinal direction of the linear member, and formed symmetrically with respect to a center line located at the center in a width direction of the anchor plate body as an axis of symmetry,
The second linear member is
a second fixing portion directly fixed to the anchor plate body;
a first arc portion disposed on the holding portion side, the first arc portion having a diameter larger than the width dimension of the holding portion and smaller than the diameter of the insertion portion, and formed in a substantially arc shape;
a first outer shape portion provided radially outward of the first arc portion and forming an outer shape of the second linear member;
a second constricted portion that protrudes toward the inside of the retaining portion, connects the first arc portion and the first outer shape portion, and is formed to have an inflection point with respect to the first arc portion, against which the neck portion of the bolt abuts when the neck portion passes through;
The anchor plate according to any one of claims 1 to 5, comprising: The second fixing portion is
a pair of third engagement portions formed at both longitudinal ends of the second linear member and respectively engaged with a pair of second engagement holes formed in a lower end of the anchor plate body;
a pair of fourth engagement portions formed continuously with the second constricted portion and engaged with a pair of side end portions of the anchor plate body located radially outward of the first arc portion, respectively;
The anchor plate of claim 9 , comprising: the elastic member is a third linear member formed of an endless linear member and formed symmetrically with respect to a center line located at the center of the width direction of the anchor plate body as an axis of symmetry,
The third linear member is
a second arc portion disposed on the holding portion side, the second arc portion having a diameter larger than the width dimension of the holding portion and smaller than the diameter of the insertion portion, and formed in a substantially arc shape;
a second outer shape portion provided radially outward of the second arc portion and forming an outer shape of the third linear member;
a third constricted portion that protrudes toward the inside of the retaining portion, connects the second arc portion and the second outer shape portion, and is formed to have an inflection point with respect to the second arc portion, against which the neck portion of the bolt abuts when the neck portion passes through;
The anchor plate according to any one of claims 1 to 5, comprising: The anchor plate according to claim 11, wherein the anchor plate body includes a housing portion that houses the second arc portion and the second outer shape portion . The anchor plate body is
a first plate that constitutes a part of the anchor plate body;
a second plate that forms another portion of the anchor plate body and overlaps the first plate to form the accommodation portion between the first plate and the second plate;
a positioning portion formed in the accommodation portion, the positioning portion being inserted between the second arc portion and the second outer shape portion to position the third linear member;
The anchor plate of claim 12 , comprising : A vehicle seat in which one end in the longitudinal direction of a seat belt is attached to the anchor plate according to any one of claims 1 to 13.