Anchor plate and anchor device

Abstract

To provide an anchor plate which can suppress influence on a use period of a seat belt webbing.SOLUTION: An anchor plate 3 includes a base plate including a plate body 10, and a resin plate 30 overlapping an upper face 10f of the plate body 10, and a spring plate 20 mounted on the base plate. The plate body 10 is formed into a flat shape, and has a wide part 15a as an opening to which a seat belt webbing 103 is inserted. The resin plate 30 has a webbing insertion part 35w covering the edge part of the wide part 15a, to which the seat belt webbing 103 is inserted. A hook piece part 38 which is a part covering other main surface different from the upper face 10f of the plate body 10 in the webbing insertion part 35w is formed so as to extend to a part in the width direction of the seat belt webbing 103, and the side of a base end 10E from both sides in the width direction of the part.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present disclosure relates to an anchor plate and an anchor device.

Background Art

[0002] An anchor device for connecting a seat belt webbing to an automobile body is described in Patent Document 1. This anchor device includes an anchor plate, an opening provided in the anchor plate, and a stopper including a spring plate fastened to the plate body with a rivet. The head of a bolt fixed to the vehicle body is inserted into the opening, and the edge of the opening is clamped between the flange and the head of the bolt. By engaging a locking piece provided on the stopper with the bolt head, the backward movement of the bolt head is prevented, and the clamping state of the edge by the bolt head and the flange is maintained.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a conventional anchor device described in Patent Document 1 and the like, the seat belt webbing is inserted through and fixed to an opening provided in the anchor plate. However, since the anchor plate is flat, the contact area between the seat belt webbing and the opening is small. For this reason, when, for example, a passenger wears the seat belt webbing, when an external force is applied via the seat belt webbing by an operation such as the passenger pulling the seat belt webbing, the load applied to the contact portion of the seat belt webbing tends to increase. As a result, the seat belt webbing may wear, which may affect the service life.

[0005] The present disclosure aims to provide an anchor plate and an anchor device that can suppress the influence on the service life of a seat belt webbing.

Means for Solving the Problems

[0006] An anchor plate according to an aspect of an embodiment of the present invention is an anchor plate connected and fixed to a locking body attached to a vehicle body or a seat, and includes a base plate having an opening into which the locking body is inserted on the base end side and through which a seat belt webbing is inserted on the tip side, and a spring plate attached to the base plate. The base plate has a first plate and a resin second plate overlapping one surface of the first plate. The first plate is formed in a flat plate shape and has a first insertion hole through which the seat belt webbing is inserted. The second plate covers an edge portion of the first insertion hole and has a second insertion hole through which the seat belt webbing is inserted. A portion of the second insertion hole covering the other main surface of the first plate is formed along a portion in the width direction of the seat belt webbing and extending from both sides in the width direction of the portion toward the base end side.

[0007] Similarly, an anchor device according to an aspect of an embodiment of the present invention includes the above-described anchor plate and a locking body attached to a vehicle body or a seat and connecting and fixing the anchor plate.

Effects of the Invention

[0008] According to the present disclosure, it is possible to provide an anchor plate and an anchor device that can suppress the influence on the service life of a seat belt webbing.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Embodiments for Carrying Out the Invention

[0010] Hereinafter, embodiments will be described with reference to the accompanying drawings. For ease of understanding the description, the same reference numerals are given to the same components in each drawing as much as possible, and duplicate descriptions are omitted.

[0011] In the following description, the X direction, Y direction, and Z direction are perpendicular to each other. The X direction is the longitudinal direction of the anchor plate 3 and the sliding direction when the anchor plate 3 engages with the bolt 2. The Y direction is the short side direction of the anchor plate 3. The Z direction is the facing direction between the anchor plate 3 and the bolt 2 and is the axial direction of the bolt 2 in the state where the anchor plate 3 is engaged with the bolt 2. In the following description, the Z positive direction side may also be expressed as the "upper side" and the Z negative direction side as the "lower side".

[0012] FIG. 1 is a perspective view of an anchor device 1 according to an embodiment. FIG. 2 is a perspective view of the anchor device 1 during engagement between an anchor plate 3 and a bolt 2. FIG. 3 is a perspective view of the anchor device 1 in a state where the anchor plate 3 and the bolt 2 are engaged. FIG. 4 is an exploded perspective view of the anchor plate 3. FIG. 5 is a plan view of a resin plate 30. FIG. 6 is a plan view of a spring plate 20. FIG. 7 is a longitudinal sectional view of the anchor plate 3 in FIG. 1.

[0013] The anchor device 1 according to this embodiment is a device that connects a seat belt webbing 103 to a vehicle body by connecting a loop portion 103A (see FIG. 10) at one end of the seat belt webbing 103 and connecting and fixing it to a bolt 2 fixed to the vehicle body or the seat.

[0014] As shown in FIG. 1, the anchor device 1 has a bolt 2 as a locking body attached to an automobile body and an anchor plate 3 locked to the bolt 2. The seat belt webbing 103 (see FIG. 10) is passed through the anchor plate 3.

[0015] The bolt 2 has a bolt shaft portion 2a, a bolt head 2b at the tip of the bolt shaft portion 2a, a flange 2c provided in the middle of the bolt shaft portion 2a, and a groove portion 2d formed between the bolt head 2b and the flange 2c. Although not shown, a male thread is provided on the outer peripheral surface of the bolt shaft portion 2a on the rear end side of the flange 2c. The groove portion 2d encircles the periphery of the bolt head 2b. Reference numeral 2r indicates the back surface of the bolt head 2b.

[0016] The anchor plate 3 has a plate body (first plate) 10, a resin plate (second plate) 30, and a spring plate 20 attached to the plate body 10. The plate body 10 is made of a metal plate having an upper surface 10f as shown in FIG. 4. The plate body 10 has a greater length in the front-rear direction from the tip 10T to the base end (rear end) 10E than the width in the direction orthogonal thereto. In this embodiment, a base plate is constituted by the plate body 10 and the resin plate 30.

[0017] As shown in FIG. 4, an opening 15 is provided in the plate body 10. The opening 15 extends in the longitudinal direction of the plate body 10, with the large-width portion 15a on the tip 10T side and the small-width portion 15b on the base end 10E side.

[0018] The large-width portion 15a has a width through which the bolt head 2b can pass. The portion where the large-width portion 15a and the small-width portion 15b are continuous has a gradually decreasing left-right width toward the small-width portion 15b. The width of the small-width portion 15b is smaller than the diameters of the bolt head 2b and the flange 2c, and slightly larger than the bolt diameter in the groove portion 2d.

[0019] The plate body 10 has a pair of long side portions 11, 12 surrounding the opening 15 and a pair of short side portions 13, 14. Rivet holes 16, 17 are provided in the middle of the long side portions 11, 12 in the longitudinal direction.

[0020] As shown in FIGS. 4, 5, and 7, the resin plate 30 is arranged to overlap one surface (upper surface 10f) of the plate body 10. The outer shape of the resin plate 30 is the same as or slightly smaller than the outer shape of the plate body 10.

[0021] The resin plate 30 has a pair of long side portions 31, 32 overlapping the long side portions 11, 12 of the plate body 10, a pair of short side portions 33, 34 overlapping the short side portions 13, 14, an opening 35 surrounded by these long side portions 31, 32 and short side portions 33, 34, and rivet working holes 36, 37 provided in the middle of the long side portions 31, 32 in the longitudinal direction.

[0022] As shown in FIGS. 4 and 7, a hook piece portion 38 having an L-shaped cross-sectional shape is provided on the short side portion 33 on the tip 30T side of the resin plate 30. There is a gap substantially the same as the thickness of the plate body 10 between the hook piece portion 38 and the short side portion 33.

[0023] The lower surfaces of the proximal ends 30E of the long side portions 31, 32 are inclined surfaces that are more separated from the upper surface 10f of the plate body 10 toward the proximal end 30E side, and the leg portions 21, 22 of the spring plate 20 shown in FIGS. 4 and 6 are arranged along this inclined surface.

[0024] As shown in FIGS. 4 and 5, on the distal end 30T side of the long side portions 31, 32 beyond the middle in the longitudinal direction, approaching portions 41, 42 that project toward each other from the inner peripheral edge of the opening 35 are provided. The distance between the narrowest portions of the approaching portions 41, 42 is smaller than the diameter of the bolt head 2b. The distal end 30T side of the opening 35 beyond the approaching portions 41, 42 is a webbing insertion portion 35w (second insertion hole).

[0025] On the proximal end 30E side of the approaching portions 41, 42, overhanging piece portions 51, 52 are provided from the inner peripheral edge of the opening 35.

[0026] The overhanging piece portions 51, 52 extend in the longitudinal direction of the opening 35. The distance between the overhanging piece portions 51, 52 is substantially the same as the distance of the narrow portion 15b, smaller than the diameter of the head 2b and the flange 2c of the bolt 2, and slightly larger than the diameter of the bolt groove portion 2d.

[0027] The space between the overhanging piece portions 51, 52 is a fine hole portion 35b. The space between the overhanging piece portions 51, 52 and the approaching portions 41, 42 is a large hole portion 35a.

[0028] On the approaching portion 41, 42 side of the upper surfaces (the surfaces opposite to the plate body 10) of the overhanging piece portions 51, 52, slope portions 51a, 52a that slope downward toward the approaching portions 41, 42 are provided. The back surface 2r of the bolt head 2b shown in FIG. 1 can move along this slope portion 51a, 52a and ride on the upper surface of the overhanging piece portions 51, 52. The overhanging piece portions 51, 52 are provided at positions and with sizes that overlap the edges of the narrow portion 15b of the opening 15 of the long side portions 11, 12 of the plate body 10. Although only the overhanging piece portion 51 is shown in FIG. 7, the positional relationship of the overhanging piece portion 52 is the same.

[0029] Further, as shown in FIGS. 5 and 7, the resin plate 30 is provided with a small piece portion 53 that protrudes into the opening 35 from the short side portion 34 on the proximal end 30E side. The small piece portion 53 is positioned between elastic pieces 61 and 62, which will be described later. Further, as shown in FIG. 7, the small piece portion 53 is provided at a position and size that overlap with the edge portion on the proximal end 10E side of the opening 15 of the plate body 10.

[0030] As shown in FIG. 7, the upper surface of the small piece portion 53 and the upper surfaces of the protruding piece portions 51 and 52 (excluding the slope portions 51a and 52a) are flush. Thus, when the bolt 2 is locked to the anchor plate 3 as described later, the back surface 2r of the bolt head 2b rides on the protruding piece portions 51 and 52 and the small piece portion 53.

[0031] Elastic pieces (resin elastic pieces) 61 and 62 that the bolt head 2b abuts against are provided near the short side portion 34 on the proximal end 30E side of the resin plate 30. The elastic pieces 61 and 62 extend from the inner peripheral edge near the proximal end 30E of the long side portions 31 and 32 in a direction approaching each other and toward the short side portion 34.

[0032] The elastic pieces 61 and 62 are symmetrically provided on both sides with the center in the width direction of the opening 15 interposed therebetween. The tip ends in the extending direction of the elastic pieces 61 and 62 are separated from the short side portion 34.

[0033] Retention piece portions 71 and 72 project from the proximal end 30E side of the long side portions 31 and 32 in the extending direction of each long side portion 31 and 32.

[0034] As shown in FIGS. 4 and 6, the spring plate 20 has leg portions 21 and 22 whose distal end 20T sides are attached to the long side portions 11 and 12 of the plate body 10, a tie portion 23 that connects the proximal end 20E sides of the leg portions 21 and 22, a tongue portion 25 that extends from the tie portion 23 to the vicinity of the approaching portions 41 and 42, a stopper piece 26 provided by cutting and raising from the tongue portion 25, and the like.

[0035] The leg portions 21, 22 are provided with rivet holes 21a, 22a on the tip 20T side. By making the rivet holes 21a, 22a of the leg portions 21, 22 coaxial with the rivet holes 16, 17 of the plate body 10 and driving rivets 81, 82, the spring plate 20 is fixed to the plate body 10. The leg portions 21, 22 are more separated from the plate body 10 toward the base end 20E side.

[0036] The base end 20E sides of the leg portions 21, 22 are U-shaped portions 21u, 22u that are curved in a substantially U shape.

[0037] Both ends of the tie portion 23 of the spring plate 20 are continuous with the end portions 21b, 22b of the respective U-shaped portions 21u, 22u. The respective end portions 21b, 22b and the tie portion 23 are planar so as to overlap the upper surface of the plate body 10.

[0038] The base end of the tongue portion 25 is a U-shaped curved portion 25r that is continuous with the tie portion 23.

[0039] The tongue portion 25 extends from the curved portion 25r substantially parallel to the upper surface 10f of the plate body 10. The tip of the extending direction of the tongue portion 25 reaches the large hole portion 35a of the resin plate 30.

[0040] The tip of the tongue portion 25 is a bent portion 25b that is bent in a substantially U shape. The bent portion 25b is disposed between the approaching portions 41, 42 of the resin plate 30.

[0041] As shown in FIG. 7, the plate surface of the tongue portion 25 and the upper surface 10f of the plate body 10 are separated by the thickness of the bolt head 2b (see also FIG. 9).

[0042] The stopper piece 26 is formed by cutting and raising from the tongue portion 25. The stopper piece 26 is continuous with the tip 20T side of the tongue portion 25 and is in a tongue shape that extends toward the base end 20E side. The stopper piece 26 is inclined so as to approach the plate body 10 side from the plate surface of the tongue portion 25 toward the base end 20E side.

[0043] To assemble this anchor plate 3, first, assemble the spring plate 20 and the resin plate 30. At this time, the leg portions 21, 22 are engaged with the lower surface of the base ends 30E sides of the long side portions 31, 32, and the rivet holes 21a, 22a are coaxial with the rivet working holes 36, 37.

[0044] The tie portion 23 is disposed below the short side portion 34. The curved portion 25r of the tongue portion 25 surrounds the short side portion 34. The tongue portion 25 extends to the large hole portion 35a through the upper side of the fine hole portion 35b, and the bent portion 25b is disposed between the approaching portions 41, 42.

[0045] After assembling the spring plate 20 and the resin plate 30 in this way, as shown in FIG. 7, insert the L-shaped hook piece portion 38 of the resin plate 30 through the opening 15 below the short side portion 13 of the plate body 10. Thereby, the short side portion 13 of the plate body 10 is clamped by the hook piece portion 38 and the short side portion 33. Also, stack the base end 20E side of the spring plate 20 and the resin plate 30 on the upper surface 10f of the plate body 10. Next, drive the rivets 81, 82 through the rivet working holes 36, 37 into the rivet holes 21a, 22a and the rivet holes 16, 17 to connect and fix the spring plate 20 and the resin plate 30 to the plate body 10.

[0046] By fixing the spring plate 20 and the resin plate 30 to the plate body 10 in this way, the anchor plate 3 is constituted.

[0047] At this time, the anchor plate 3 includes a base plate having an opening into which the bolt 2 attached to the vehicle body or the seat is inserted on the base end side and through which the seat belt webbing 103 is inserted on the tip end side, and a spring plate 20 attached to the base plate. The base plate has a plate body 10 and a resin plate 30 overlapping the upper surface 10f of the plate body 10. That is, the "opening of the base plate" is formed by overlapping the opening 15 of the plate body 10 and the opening 35 of the resin plate 30 in the Z direction.

[0048] Next, in addition to FIGS. 1 to 3 and FIG. 7, referring to FIGS. 8 and 9, an engagement procedure between the anchor plate 3 and the bolt 2 will be described. FIG. 8 is a longitudinal sectional view of the anchor device 1 during the engagement between the anchor plate 3 and the bolt 2, corresponding to the state shown in FIG. 2. FIG. 9 is a longitudinal sectional view of the anchor device 1 in a state where the anchor plate 3 and the bolt 2 are engaged, corresponding to the state shown in FIG. 3. Note that FIG. 7 is a longitudinal sectional view of the assembled anchor plate 3, corresponding to the state shown in FIG. 1.

[0049] In the present embodiment, the anchor plate 3 and the bolt 2 are engaged in the procedure shown in FIGS. 1, 2, and 3.

[0050] The bolt 2 is fixed to the vehicle body or the seat by screwing the bolt shaft portion 2a into a female screw member (not shown) of the vehicle body or the seat. In the present embodiment, it is fixed to the fixing member 101 (see FIG. 10) of the vehicle body. Further, a seat belt webbing 103 (see FIG. 10) is inserted in advance into the webbing insertion portion 35w (on the tip side of the approaching portions 41 and 42) of the anchor plate 3.

[0051] First, as shown by arrow A in FIG. 1, the anchor plate 3 is brought close to the bolt 2 from the Z positive direction side, and the large hole portion 35a of the opening 35 is externally fitted to the bolt head portion 2b. Thereafter, as the anchor plate 3 is further pushed in the Z negative direction side as shown by arrow A in FIGS. 1 and 8, the tongue portion 25 is pressed via the stopper piece 26 of the spring plate 20 that contacts the bolt head portion 2b, and as shown by arrow B in FIGS. 2 and 8, the tongue portion 25 and the stopper piece 26 are elastically deformed about the curved portion 25r on the proximal end 20E side and pushed upward.

[0052] Next, as shown by arrow C in FIGS. 2 and 8, the anchor plate 3 is moved in the direction (X positive direction side) in which the proximal ends 10E, 20E, and 30E approach the bolt 2. Then, the bolt 2 moves from the large hole portion 35a to the small hole portion 35b, and the back surface 2r of the bolt head portion 2b slides along the slope portions 51a and 52a of the overhanging piece portions 51 and 52 of the resin plate 30 shown in FIG. 7, and the flange 2c slides along the back surface of the plate body 10.

[0053] During this movement, first, the upper surface of the bolt head 2b abuts against the lower surface of the stopper piece 26. When the anchor plate 3 is further moved, as shown in FIG. 8, the bolt head 2b enters between the stopper piece 26 and the overhanging pieces 51, 52. When the anchor plate 3 is further moved in the direction of arrow C, as shown in FIGS. 3 and 9, the bolt head 2b passes through the stopper piece 26 and moves to the proximal end 20E side of the slope portions 51a, 52a of the overhanging pieces 51, 52 and is elastically pressed against the elastic pieces 61, 62. Also, the back surface 2r of the bolt head 2b is in a state of riding on the small piece portion 53.

[0054] In this state, the stopper piece 26 is located on the large hole portion 35a side of the bolt head 2b. As shown by arrow D in FIGS. 3 and 9, the tongue portion 25 and the stopper piece 26 elastically return downward about the curved portion 25r and return to the position in the initial state of FIG. 1. As a result, the tip of the stopper piece 26 moves below the upper surface of the bolt head 2b and engages with the side surface of the bolt head 2b. As a result, backward movement of the bolt head 2b in the direction of the large hole portion 35a is prevented, and the anchor plate 3 is connected to the bolt 2 in a non-removable manner.

[0055] Also, the bolt head 2b receives an elastic reaction force from the elastic pieces 61, 62 and is pressed against the tip of the stopper piece 26, preventing movement of the anchor plate 3 in the longitudinal direction.

[0056] Also, as shown in FIG. 9, the overhanging pieces 51, 52 and the small piece portion 53 of the resin plate 30 and the edge portion on the proximal end 10E side of the opening 15 of the plate body 10 are sandwiched between the bolt head 2b and the flange 2c.

[0057] Since this anchor plate 3 has one opening 15 in the plate body 10, it is easy to manufacture and it is also possible to reduce the overall length of the plate body 10. Also, the leg portions 21, 22 and the tongue portion 25 of the spring plate 20 are also substantially flat as a whole, making production easy.

[0058] In this anchor plate 3, since the interior of the openings 15 and 35 is partitioned by the approaching portions 41 and 42 to define the webbing insertion portion 35w, when locking the anchor plate 3 to the bolt 2, the seat belt webbing 103 does not enter the large hole portion 35a, and this locking operation can be easily performed.

[0059] In this anchor plate 3, the overhanging pieces 51 and 52 and the small piece 53 of the resin plate 30 and the edge of the opening 15 of the plate body 10 are clamped by the bolt head 2b and the flange 2c. Thereby, the anchor plate 3 is prevented from moving in the axial direction of the bolt 2. Further, due to the reaction force from the elastic pieces 61 and 62, the side surface of the bolt head 2b is pressed against the tip of the stopper piece 26. Thereby, the anchor plate 3 is prevented from moving in the plate surface direction (longitudinal direction), and vibration and abnormal noise are prevented.

[0060] Particularly in the present embodiment, the spring plate 20 is formed such that at least a part thereof protrudes from the surface (the upward-facing surface) of the resin plate 30 before and after the anchor plate 3 is connected and fixed to the bolt 2.

[0061] Specifically, in the present embodiment, a protrusion 27 is provided at a position substantially in the center of the upper surface of the tongue portion 25 of the spring plate 20. The protrusion 27 is, for example, substantially circular in plan view as shown in FIG. 1, and is formed to protrude upward with respect to the upper surface of the tongue portion 25. Further, in the present embodiment, the surface of the protrusion 27 is formed in a curved surface shape that protrudes most upward at the central portion in plan view and is convex outward. Furthermore, as shown in FIG. 7 for example, the protrusion 27 is formed such that at least the top portion is at the uppermost position among the spring plates 20. Although the configuration of providing one protrusion 27 is illustrated in FIG. 1 and the like, a configuration of providing a plurality of protrusions may also be used.

[0062] By providing the protrusion 27 on the tongue portion 25, in the state before the anchor plate 3 shown in FIG. 7 is connected and fixed to the bolt 2, the height H from the upper surface 10f of the plate body 10 to the uppermost part of the spring plate 20, that is, the protrusion 27, can be set higher than the height h from the upper surface 10f of the plate body 10 to the upper surface of the resin plate 30. Similarly, even in the state after the anchor plate 3 shown in FIG. 9 is connected and fixed to the bolt 2, the height H from the upper surface 10f of the plate body 10 to the uppermost part of the spring plate 20, that is, the protrusion 27, can be set higher than the height h from the upper surface 10f of the plate body 10 to the upper surface of the resin plate 30. Also, as shown in FIG. 8, in the state where the anchor plate 3 is being connected and fixed to the bolt 2, since the tongue portion 25 of the spring plate 20 is pushed upward, naturally the height H' from the upper surface 10f of the plate body 10 to the uppermost part of the spring plate 20, that is, the tip portion on the positive X direction side of the tongue portion 25 in the case of FIG. 8, can be set higher than the height h from the upper surface 10f of the plate body 10 to the upper surface of the resin plate 30. That is, as shown in FIGS. 7 to 9, the relationship of H>h and H'>h is obtained.

[0063] Therefore, as described above, in the present embodiment, it is possible to satisfy the requirement that at least a part of the tongue portion 25 of the spring plate 20 protrudes from the surface of the resin plate 30 before and after the anchor plate 3 is connected and fixed to the bolt 2. Specifically, the protrusion 27 is formed such that the height H from the upper surface 10f of the plate body 10 to the top of the protrusion 27 is higher than the height h from the upper surface 10f of the plate body 10 to the part of the resin plate 30 that is farthest upward from the upper surface 10f, thereby satisfying the above requirement.

[0064] Referring to FIG. 10, the effects of satisfying the above requirements will be described. FIG. 10 is a schematic diagram showing an example of a state where the anchor device 1 according to the embodiment is installed on the vehicle body. In the example of FIG. 10, the bolt 2 is installed on a fixing member 101 on the vehicle body side such as a pillar, for example. The anchor plate 3 is installed such that its upper surface side faces an exterior material 102 of the seat, such as a side cover of the seat in the passenger compartment.

[0065] As described above, the protrusion 27 is formed to protrude upward with respect to the tongue portion 25 of the spring plate 20. For this reason, the top portion of the protrusion 27 is disposed closer to the surface of the exterior material 102 than the upper surface of the tongue portion 25. That is, as shown in FIG. 10, the distance D1 between the protrusion 27 and the exterior material 102 is smaller than the distance D2 between the tongue portion 25 and the exterior material 102 (D1 > D2).

[0066] The seat belt webbing 103 is inserted through the webbing insertion portion 35w of the anchor plate 3 and is connected to the anchor plate 3. One end of the seat belt webbing 103 is inserted through the webbing insertion portion 35w and then joined to the seat belt webbing 103 to form a loop portion 103A. This loop portion 103A surrounds the short side portion 33 and the hook piece portion 38 of the resin plate 30 and the short side portion 13 of the plate body 10 of the anchor plate 3 around the Y axis. The seat belt webbing 103 is connected to the anchor plate 3 via this loop portion 103A.

[0067] When the seat belt webbing 103 is pulled by the occupant, for example, when the occupant wears it, an external force F acting toward the other end side is applied. This external force F is transmitted to the anchor plate 3 via the loop portion 103A. Due to this external force F, for example, the anchor plate 3 may be twisted around the X axis or inclined in the positive X direction and the negative Z direction (the lower right direction in FIG. 10) with respect to the axial direction (Z direction) of the bolt 2. When such a situation occurs, the tongue portion 25 of the spring plate 20 may be elastically deformed upward with respect to the bolt 2 around the curved portion 25r, which may affect the engagement between the stopper piece 26 and the side surface of the bolt head 2b of the bolt 2.

[0068] To address this problem, in the anchor plate 3 and the anchor device 1 according to the present embodiment, the protrusion 27 is provided on the spring plate 20 as described above. By satisfying the above requirements, the distance between the spring plate 20 and the seat exterior material 102 can be shortened. Therefore, even when an external force F is applied to the anchor plate 3 via the seat belt webbing 103, the protrusion 27 can contact the exterior material 102 first, so that the amount of elastic deformation of the tongue portion 25 of the spring plate 20 upward can be suppressed. As a result, the influence on the engagement between the anchor plate 3 and the bolt 2 can be suppressed.

[0069] In FIG. 10, the configuration in which the anchor device 1 according to the present embodiment is installed on the vehicle body is illustrated. However, the anchor device 1 may be installed on the seat side. In this case, the bolt 2 is installed, for example, on the side surface portion of the seat. The anchor plate 3 is installed such that the upper surface side faces the surface on the passenger compartment side of the vehicle body, such as a pillar. That is, the positional relationship between the vehicle body side element 101 and the seat side element 102 shown in FIG. 10 is reversed with respect to the anchor device 1.

[0070] Therefore, even in the case of the configuration in which the anchor device 1 is installed on the seat side, the same effects as those described with reference to FIG. 10 can be achieved. That is, by providing the protrusion 27 on the spring plate 20, the distance between the spring plate 20 and the surface on the passenger compartment side of the vehicle body side element 101 can be shortened. For this reason, even when a situation occurs where the anchor plate 3 is distorted, the protrusion 27 can be made to hit the vehicle body side element 101, so that the amount of elastic deformation of the tongue portion 25 of the spring plate 20 toward the vehicle body side can be suppressed. Thereby, the influence on the engagement between the anchor plate 3 and the bolt 2 can be suppressed.

[0071] Incidentally, as shown in FIG. 4 and the like, the plate body 10 is a metal plate formed in a flat plate shape. The seat belt webbing 103 is inserted through the large portion 15a (first insertion hole) on the tip 10T side of the opening 15 of the plate body 10. Further, as shown in FIGS. 4 and 7, there is a gap substantially the same as the thickness of the plate body 10 between the short side portion 33 on the tip 30T side of the resin plate 30 and the hook piece portion 38 having an L-shaped cross-sectional shape, and the short side portion 13 on the tip 10T side of the plate body 10 is fitted into this gap. Thereby, the short side portion 13 of the plate body 10 is sandwiched between the hook piece portion 38 and the short side portion 33, covering the edge of the large portion 15a of the plate body 10, and a webbing insertion portion 35w (second insertion hole) through which the seat belt webbing 103 is inserted is formed.

[0072] Particularly in this embodiment, a convex portion 39 is provided at the edge of the webbing insertion portion 35w (second insertion hole). The convex portion 39 is provided at least in a portion (portion on the X positive direction side) along the width direction (Y direction) of the seat belt webbing 103 among the edges, protrudes in a direction away from the upper surface 10f of the plate body 10 (Z positive direction in this embodiment), and the surface is formed in a curved shape along the extending direction of the seat belt webbing 103.

[0073] By providing the convex portion 39 in this way, when the seat belt webbing 103 is pulled by an external force F from the other end side as shown in FIG. 10, the portion of the loop portion 103A that contacts the edge of the webbing insertion portion 35w can be made to contact the convex portion 39. Thereby, the contact area between the loop portion 103A and the edge of the webbing insertion portion 35w can be increased, and the load applied to the contact portion of the seat belt webbing 103 can be dispersed. Thereby, wear of the seat belt webbing 103 can be suppressed, and the influence on the service life can be suppressed.

[0074] Further, since the convex portion 39 is formed on the resin plate 30, it is not necessary to perform a burring process on the short side portion 13 of the metal plate body 10 covered with the resin plate 30 so as to correspond to the shape of the convex portion 39, and it may remain flat. Thereby, the manufacturability of the plate body 10 can be improved, and the degree of freedom of the shape of the convex portion 39 can be improved.

[0075] Next, with reference to FIGS. 11 to 13, a modified example of the convex portion 39 according to the present embodiment will be described.

[0076] FIG. 11 is a view showing convex portions 39A and 39B according to a first modified example. FIG. 11 corresponds to an enlarged view of the vicinity of the webbing insertion portion 35w, the hook piece portion 38, and the short side portion 33 in FIG. 10.

[0077] As shown in FIG. 11(A), the convex portions 39A and 39B may be provided on both sides of a pair of main surfaces of the plate body 10. In FIG. 11(A), a first convex portion 39A is provided in a direction away from the upper surface 10f of the plate body 10, and a second convex portion 39B is provided in a direction away from the lower surface opposite to the upper surface 10f. That is, in the example of FIG. 11, at the edge of the webbing insertion portion 35w, two convex portions 39A and 39B protruding on both sides in the Z direction are provided. Note that the shape of each convex portion 39A and 39B is formed in a curved surface shape along the extending direction of the seat belt webbing 103, similar to the convex portion 39 of the above-described embodiment.

[0078] If a configuration is adopted in which convex portions 39A and 39B are provided on both sides in the Z direction at the edges of the webbing insertion portion 35w as in the example of FIG. 11, compared with the configuration of the above embodiment, the contact area between the loop portion 103A and the edges of the webbing insertion portion 35w can be further increased. Therefore, the load applied to the contact portion of the seat belt webbing 103 can be further dispersed. As a result, it is further advantageous in that it is possible to suppress the influence on the service life of the seat belt webbing 103.

[0079] Further, in the configuration of FIG. 11, in both cases where the direction in which the seat belt webbing 103 is pulled is the side of one convex portion 39A and the side of the other convex portion 39B, either one of the pair of convex portions 39A and 39B can mainly receive the load from the seat belt webbing 103. As a result, regardless of the difference between the longitudinal direction of the anchor plate 3 and the pulling direction of the seat belt webbing 103, the load applied to the contact portion of the seat belt webbing 103 can always be dispersed with the same structure shown in FIG. 11. For this reason, the versatility of the anchor plate 3 and the anchor device 1 can be improved.

[0080] Further, as shown in FIG. 11(B), a configuration may be adopted in which the convex portion 39A shown in FIG. 11(A) is not provided and only the convex portion 39B provided in a direction away from the lower surface of the plate body 10 is provided. The main point is that a configuration provided on one side of the pair of main surfaces of the plate body 10, such as the configuration including the convex portion 39 shown in FIG. 10 or the configuration including the convex portion 39B shown in FIG. 11(B), may be adopted.

[0081] In the configuration shown in Fig. 11(B), when the seat belt webbing 103 is pulled in the direction where the convex portion 39B is provided, that is, in the +X direction and -Z direction, and an external force F is applied in this direction, the convex portion 39B can mainly receive the load from the seat belt webbing 103. On the other hand, as shown in Fig. 10, when the seat belt webbing 103 is pulled in the direction where the convex portion 39 is provided, that is, in the +X direction and +Z direction, and an external force F is applied in this direction, the convex portion 39 can mainly receive the load from the seat belt webbing 103. Thus, in the case of a configuration where the convex portion is provided on one side of the pair of main surfaces of the plate body 10, depending on the pulling direction of the seat belt webbing 103 with respect to the longitudinal direction of the anchor plate 3 (the X direction in Figs. 10 and 11), the configuration having the convex portion 39 shown in Fig. 10 and the configuration having the convex portion 39B shown in Fig. 11(B) may be selectively used.

[0082] Fig. 12 is a view showing the convex portions 39C and 39E according to the second modification. Fig. 12 also corresponds to an enlarged view of the vicinity of the webbing insertion portion 35w, the hook piece portion 38, and the short side portion 33 in Fig. 10.

[0083] As shown in Fig. 12, the protruding directions of the convex portions 39C and 39E do not necessarily have to be in the normal direction of the pair of main surfaces of the plate body 10, and may be inclined with respect to the direction of the main surface. At this time, it is preferable that the inclination direction is inclined in the direction of the external force F applied from the seat belt webbing 103.

[0084] For example, as shown in Fig. 12(A), in the case of an installation structure in which the seat belt webbing 103 is pulled in the +X direction and +Z direction, and an external force F is applied in this direction, the convex portion 39C is provided so as to protrude in the direction E inclined from the +Z direction toward the +X direction side. With this configuration, the load from the seat belt webbing 103 applied to each part of the convex portion 39C can be made more uniform.

[0085] Furthermore, when providing the convex portions 39C as shown in Fig. 12(A), it is preferable that the portion 39D of the inner peripheral surface of the webbing insertion portion 35w where the convex portions 39C are provided is also formed to be inclined with respect to the Z direction so as to extend along the protruding direction E of the convex portions 39C. In this case, as shown in Fig. 12(A), the convex portions 39C and the inner peripheral surface 39D of the webbing insertion portion 35w are formed flush with each other and are both formed to be inclined along the inclined direction E. With this configuration, the load from the seat belt webbing 103 applied to each part of the convex portions 39C and the inner peripheral surface 39D can be made more uniform.

[0086] On the other hand, for example, as shown in Fig. 12(B), in the case of an installation structure where the seat belt webbing 103 is pulled in the positive X direction and the negative Z direction and an external force F is applied in this direction, the convex portion 39E is provided so as to protrude in the direction G inclined from the negative Z direction toward the positive X direction side. With this configuration, the load from the seat belt webbing 103 applied to each part of the convex portion 39E can be made more uniform.

[0087] Furthermore, when providing the convex portions 39E as shown in Fig. 12(B), it is preferable that the portion 39F of the inner peripheral surface of the webbing insertion portion 35w where the convex portions 39E are provided is also formed to be inclined with respect to the Z direction so as to extend along the protruding direction G of the convex portions 39E. In this case, as shown in Fig. 12(B), the convex portions 39E and the inner peripheral surface 39F of the webbing insertion portion 35w are formed flush with each other and are both formed to be inclined along the inclined direction G. With this configuration, the load from the seat belt webbing 103 applied to each part of the convex portions 39E and the inner peripheral surface 39F can be made more uniform.

[0088] Fig. 13 is a view showing the convex portions 39G and 39H according to the third modification. Fig. 13 corresponds to the longitudinal sectional view of the anchor device 1 shown in Fig. 10.

[0089] As shown in Fig. 13, it is preferable that the convex portions 39G and 39H are provided on at least the side that receives a large tensile force F from the seat belt webbing 103 among the pair of main surfaces of the plate body 10.

[0090] For example, as shown in FIG. 13(A), consider the case where the seat belt webbing 103 is pulled in a direction orthogonal to the longitudinal direction (X direction) of the anchor plate 3 (in the example of FIG. 13(A), the +Z direction). In this case, since the tensile force F applied by the seat belt webbing 103 is on the +Z direction side, among the edges of the webbing insertion portion 35w, the lower surface of the lower hook piece portion 38 receives the maximum tensile force F from the loop portion 103A of the seat belt webbing 103.

[0091] Therefore, in the case of the positional relationship between the longitudinal direction of the anchor plate 3 shown in FIG. 13(A) and the pulling direction of the seat belt webbing 103, it is preferable to provide the convex portion 39G on the hook piece portion 38 and form it to protrude toward the -Z direction side. Thereby, the thickness of the resin plate 30 of the portion that receives the maximum tensile force F from the seat belt webbing 103 can be increased, so that the durability of the anchor plate 3 against the tensile force F can be improved.

[0092] Next, as shown in FIG. 13(B), consider the case where the anchor plate 3 is installed inclined with respect to the vertical direction (with the +Z direction side in FIG. 13(B) being vertically upward). Also, at this time, the seat belt webbing 103 is pulled vertically upward.

[0093] When the anchor plate 3 is installed inclined in this way, the convex portion 30H is preferably provided on at least the upward-facing side of the pair of main surfaces of the plate body 10. In this case, among the edges of the webbing insertion portion 35w, the upper short side portion 33 receives the maximum tensile force F from the loop portion 103A of the seat belt webbing 103. Therefore, as shown in FIG. 13(B), the convex portion 39H is provided on the short side portion 33 on at least the upward-facing side of the pair of main surfaces of the plate body 10, that is, on the upper surface 10f side.

[0094] With the configuration shown in FIG. 13(B), the thickness of the resin plate 30 of the portion that receives the maximum tensile force F from the seat belt webbing 103 can be increased, so that the durability of the anchor plate 3 against the tensile force F can be improved.

[0095] The above has described this embodiment while referring to specific examples. However, the present disclosure is not limited to these specific examples. Those in which those skilled in the art have appropriately made design changes to these specific examples are also included in the scope of the present disclosure as long as they have the features of the present disclosure. Each element included in each of the above-described specific examples and its arrangement, conditions, shape, etc. are not limited to those illustrated and can be changed as appropriate. Each element included in each of the above-described specific examples can be appropriately combined as long as no technical contradiction occurs.

Explanation of Reference Numerals

[0096] 1 Anchor device 2 Bolt (locking body) 3 Anchor plate 10 Plate body (first plate) 10f Upper surface 10T Tip 10E Base end 20D Spring plate 30 Resin plate (second plate) 103 Seat belt webbing 15a Large portion of the opening of the plate body (first insertion hole) 35w Webbing insertion portion (second insertion hole) 38 Hook piece portion 39, 39A, 39B, 39C, 39E, 39G, 39H Convex portion

Claims

1. An anchor plate that is connected and fixed to a locking body attached to a vehicle body or a seat, the base plate having an opening into which the locking body is inserted on the proximal end side and through which a seat belt webbing is inserted on the distal end side, a spring plate attached to the base plate, comprising: the base plate having a first plate and a second resin plate overlapping one surface of the first plate, the first plate being formed in a flat plate shape and having a first insertion hole through which the seat belt webbing is inserted, the second plate covering an edge portion of the first insertion hole and having a second insertion hole through which the seat belt webbing is inserted, a portion of the second insertion hole that covers the other main surface of the first plate is formed to extend along a portion in the width direction of the seat belt webbing and from both sides in the width direction of the portion to the proximal end side, an anchor plate.

2. The anchor plate according to claim 1, a locking body attached to a vehicle body or a seat and connecting and fixing the anchor plate, an anchor device comprising.

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