JPH0966797A - Belt attaching metal fitting for seat belt device and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide belt attaching metal fitting for seat belt device which can reduce facial pressure which acts on a belt sufficiently even if tensile force acts on the belt and its manufacturing method. SOLUTION: Belt attaching metal fitting is the belt attaching metal fitting for seat belt device which is formed by a platelike body (substrate) 2 having a long hole 6. A belt (waist belt) 13 is inserted into the long hole 6, and either of long fringe sections 691 which oppose mutually in the long hole 6 receives tensile force of the belt 13 by folding the belt 13 back in either of the long fringe section 691. In this case, one of the long fringe sections 691 is formed in such a manner that it rises in the opposite direction to tensile force of the belt 13 from both ends in the longitudinal direction to a central part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt mounting bracket for a seat belt device for mounting a belt end of an automobile seat belt to a fixed portion such as a vehicle body.

[0002]

2. Description of the Related Art Conventionally, a belt mounting bracket of this type is known as shown in FIG. That is, the belt mounting bracket is formed by forming the bolt hole 3 and the long hole 69 in the substrate (plate-like body) 2, and is fixed to a fixed portion such as a vehicle body via the bolt hole 3, and the long hole 69 is formed. The connection with the belt 13 is achieved.

The belt 13 is made of, for example, a strip-shaped narrow woven fabric woven of polyester fibers.
Is folded back at one of the long edges 691 to apply tension to the one long edge 691. The one long edge portion 691 is formed in a linear shape.

[0004]

By the way, in the above-mentioned conventional belt mounting member, since one long edge portion 691 is formed in a straight line, the tension of the belt 13 causes the one long edge portion 69 to be formed.
If it is not orthogonal to 1, the belt 13 will slide sideways on one long edge portion 691 and collect at the end of the same long edge portion 691. That is, the belt 13 has one long edge portion 69.
There was a problem that it was easy to gather at the end of 1. Even if the tension of the belt 13 is orthogonal to the one long edge portion 691, if the tension is applied to the belt 13, the belt 13 itself converges thinly and the Will be gathered on a part of the long edge portion 691 of the. In addition, the tension of the belt 13 causes one of the long edge portions 691 to elastically bend and become slightly concave, so that the belt 13 itself converges finely, and therefore the belt 13 is partly on the long edge portion 691. There is a problem that it is easy to get together.

Further, the belt 13 may be curved so as to be bent along the longitudinal center line thereof.
It is advantageous in maintaining the flat state of. For this reason, the belt 13 is normally inserted into the elongated hole 69 in a curved state as described above. However, when the belt 13 is curved in this way, the left and right ends of the belt 13 come into contact with the left and right ends of the one long edge 691, for example, which makes it difficult to insert the belt 13 into the long hole 69. The problem arises.
Moreover, as shown in FIG. 38, when both end portions of the belt 13 are round and bulged, there is a problem that the bulged portion is more likely to hit both end portions of the one long edge portion 691.

Further, although the long hole 69 is formed by pressing, burrs are formed at the corners on the side punched out by pressing. If such a burr is left as it is, there is a possibility that the same action as a blade may occur,
Usually, in a step different from the pressing step, the corners are rounded or coated with vinyl chloride or polyethylene to cover the entire corners. Therefore, the cost increase due to such finishing and coating has been a problem.

Further, as shown in FIG. 39, since the belt mounting member is formed of the plate-shaped substrate 2, the area of the long edge portion 691 on one side for holding the belt 13 is small, and therefore the belt 13 acts on the belt 13. There is a problem that the surface pressure to be applied becomes high.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a belt mounting metal fitting for a seat belt device capable of sufficiently reducing the surface pressure acting on the belt even when tension is applied to the belt. And to provide a manufacturing method thereof.

[0009]

Means for Solving the Problems To achieve the above object, an invention according to claim 1 is a belt mounting bracket for a seat belt device formed of a plate-like body, wherein a belt is attached to the plate-like body. A long hole to be inserted is formed, and the long hole is one of the long edges facing each other,
The belt is folded back so as to receive the tension of the belt, and the one long edge portion is formed so as to rise from both end portions in the longitudinal direction toward the central portion. There is.

According to a second aspect of the present invention, there is provided a belt mounting bracket for a seat belt device, which is formed by a plate-shaped member having an elongated hole, wherein the belt is inserted into the elongated hole and the belt holes are opposed to each other. A belt mounting bracket for a seat belt device, wherein the belt is folded at one of the long edges to receive the tension of the belt at the one of the long edges. Is
It is characterized in that it is formed so as to rise in a direction opposite to the tension of the belt from both ends in the longitudinal direction toward the central part.

The invention according to claim 3 is the invention according to claim 1 or 2, wherein the other long edge portion facing one long edge portion is also formed along the one long edge portion. It is characterized by

The invention according to claim 4 is the invention according to claim 1, claim 2 or claim 3, wherein one of the long edges has a ridge protruding from one surface of the plate-like body. And the corners are rounded along the direction in which the belt is folded back.

The invention according to claim 5 is the invention according to claim 1, claim 2 or claim 3, wherein one long edge portion is a part of the plate-shaped body and one surface of the plate-shaped body. By bending from one side to the other surface side, it is formed so as to have a ridge protruding from the other surface, and the area in which the belt contacts is formed by this ridge, and the belt is folded back. The feature is that the corners are rounded along the direction.

The invention according to claim 6 is the invention according to claim 1, claim 2 or claim 3, wherein one long edge portion projects from one surface and the other surface of the plate member. It is characterized in that it is formed to have one ridge and the other ridge, and that the corners are rounded along the direction in which the belt is folded back.

The invention according to claim 7 is the invention according to claim 1, claim 2 or claim 3, wherein one long edge portion is a part of the plate-shaped body and one surface of the plate-shaped body. Formed by bending from one side to the other surface side and pushing back the bent portion to the one surface side so as to have one ridge and the other ridge protruding from the one surface and the other surface, respectively. In addition, the one contact area and the other contact area of the belt form a wide contact area, and the corners are rounded along the direction in which the belt is folded back.

[0016] The invention according to claim 8 is the invention according to claim 4, claim 5, claim 6 or claim 7, wherein at least one of the long holes is one of the long edges other than the one long edge. The short edge portion connecting the long edge portion and the other long edge portion is characterized in that the short edge portion is formed to have the same ridge as that of the one long edge portion.

The invention according to claim 9 is the invention according to claim 1, claim 2, claim 3, claim 4, claim 5, claim 6, claim 7 or claim 8 above. The short edge portion connecting the long edge portion and the other long edge portion is characterized in that it is formed in an arc-shaped curved line smoothly continuing from each of the one and the other long edge portions.

According to a tenth aspect of the present invention, there is provided a belt mounting bracket for a seat belt device, which is formed of a plate-shaped body,
A long hole into which the belt is inserted is formed in the plate-like body, and the long hole is one of the long edges facing each other. The one long edge portion has a ridge protruding from at least one of the one surface and the other surface of the plate-shaped body. .

The invention according to claim 11 is the above-mentioned claim 10.
In the invention according to, in the long hole, an edge portion other than the one long edge portion, the short edge portion connecting at least one long edge portion and the other long edge portion is the same convex portion as the one long edge portion. It is characterized in that it is formed to have a strip.

The invention according to claim 12 is the above-mentioned claim 10.
Or in the invention according to claim 11, one of the long edges is
It is characterized in that the corners are rounded along the direction in which the belt is folded back.

The invention according to claim 13 is the above-mentioned claim 4,
Claim 5, Claim 6, Claim 7, Claim 8, Claim 9,
In the invention according to claim 10, claim 11 or claim 12, each of the protrusions is characterized in that the amount of protrusion from the plate-shaped body is formed to 15% to 60% of the plate thickness of the plate-shaped body. There is.

According to a fourteenth aspect of the present invention, there is provided a method for manufacturing a belt mounting bracket for a seat belt device, which is formed of a plate-shaped body, wherein the plate-shaped body is formed with an elongated hole into which a belt is inserted. In the method for manufacturing a belt mounting bracket for a seat belt device, which has a ridge protruding from one of the one surface and the other surface of the plate-shaped body at the edge of the long hole, Piercing step of punching out the pilot hole of the elongated hole from the strip, and pressing a punch larger than the pilot hole into the pilot hole to form the slot, and part of the plate-like body along the slot. The present invention is characterized by including a burring step of forming a ridge by protruding and a curved surface forming step of forming a rounded corner by applying a surface pressure to the ridge formed in this burring step.

According to a fifteenth aspect of the present invention, there is provided a method of manufacturing a belt mounting bracket for a seat belt device, which is formed by a plate-shaped body, wherein the plate-shaped body is formed with an elongated hole into which a belt is inserted. In the method for manufacturing a belt mounting bracket for a seat belt device, which has a ridge protruding from one of the one surface and the other surface of the plate-shaped body at the edge of the long hole, A piercing step of punching out the pilot hole of the elongated hole from the strip, and a pressing step of removing the shearing edge portion (burr) generated by this piercing step by pressing.
Push a punch larger than this pilot hole into the pilot hole,
A burring process of forming a long hole and forming a ridge by protruding a part of the plate-like body along the long hole, and applying a surface pressure to the ridge formed in this burring process to round the corners. A curved surface forming step of forming, and a rest-like step of forming an edge portion of the long hole on the side opposite to the convex strip into a smooth round shape,
It is characterized in that it is provided with a separate step of separating it as a belt attachment fitting of a predetermined shape.

In the inventions according to the first and second aspects, when tension is applied to the belt, the portion of the belt folded back at one long edge portion comes into close contact with the one long edge portion. That is, the folded-back portion of the belt has a shape in which the central portion in the width direction thereof is raised like the one long edge portion. Therefore, the belt is in a state in which it is unlikely to shift laterally along the one long edge portion. Therefore, even if the tension direction of the belt does not coincide with the direction orthogonal to the one long edge portion, the belt is not laterally displaced along the one long edge portion and does not gather at the end portion of the long hole. .

Further, since the central portion in the width direction of the belt has a raised shape like the one long edge portion, the belt is always in a state of being widened in the width direction. Therefore, due to the tension applied to the belt, the width of the belt is maintained at its original wide state at one of the long edges even when the belt itself tries to converge so as to be thin.
That is, the belt does not collect on one of the long edges. Moreover, because one long edge is raised in the direction opposite to the tension, the tension of the belt causes
Even if one long edge is slightly elastically deformed in the direction of tension,
This one long edge does not have a concave shape. Therefore, the belt does not collect in the concave portion of the one long edge. From the above, the belt width is properly maintained at one of the long edges, so that the tension of the belt is evenly transmitted to the one long edge, and the durability of the belt and the belt mounting bracket is improved. As a result of improving the durability and improving the durability, it is possible to improve the safety.

When the belt is formed by crushing a tubular member into a flat shape, the belt is bent along the longitudinal centerline of the belt in order to maintain the flat state of the belt. Bending is effective. Then, even when the belt is inserted into the long hole while being curved as described above, the central portion of one long edge portion is formed to be raised, and the curved shape of the belt and the shape of the one long edge portion Are substantially coincident with each other, so that the left and right ends of the belt are less likely to contact the ends of one long edge. Moreover, the rounded and bulged portions at both ends of the belt are less likely to hit one long edge portion. Therefore, it becomes easy to insert the belt into the long hole.

In the invention according to claim 3, since the other long edge portion facing the one long edge portion is also formed so as to follow the shape of the one long edge portion, it is curved as described above. Since the shapes of the one and the other long edge portions substantially match the shape of the belt, it becomes easier to insert the belt into the long hole than described above.

In particular, in the invention according to claim 9, the short edge portion connecting one long edge portion and the other long edge portion is
Since it is formed in an arcuate curved line that is smoothly continuous from each of the one and the other long edges, the rounded and bulged portions at both ends of the belt are less likely to hit the short edges. That is, there is an advantage that it becomes easier to insert the belt into the long hole.

In the invention according to claim 4, since the plate-like member has a convex shape protruding from one surface, the contact area of the belt which abuts one long edge portion is large. Therefore, the surface pressure of the belt can be reduced. further,
Since the corner portion of one long edge portion is formed round along the direction in which the belt is folded back, it is possible to prevent the belt from being damaged at this corner portion. Moreover, since the corners are rounded, and it is not necessary to coat the corners with a coating such as PVC or polyethylene, the cost required for such a coating can be reduced. That is, cost can be reduced.

In the invention according to claim 5, a part of the plate-shaped body is bent from one surface side of the plate-shaped body to the other surface side, thereby forming a ridge protruding from the other surface. Therefore, the ridge can be made to largely protrude from the other surface. Therefore, it is possible to increase the area where one of the long edges hits the belt. That is, the surface pressure acting on the belt from one long edge can be sufficiently reduced. Therefore, it is possible to improve the durability of the belt and the strength of the belt mounting bracket, and to improve the safety with the improvement of the durability and the strength. Furthermore, since the corner portion of one long edge portion is formed round along the direction in which the belt is folded back, it is possible to prevent the belt from being damaged at this corner portion. Moreover, since the corners are rounded, and it is not necessary to coat the corners with a coating such as PVC or polyethylene, the cost required for such a coating can be reduced. That is, cost can be reduced.

In the invention according to claim 6, since it is formed so as to have one ridge and the other ridge which respectively project from one surface and the other surface of the plate-like body, The contact area of the belt that abuts on one of the long edge portions becomes larger than that of the invention. Therefore, the surface pressure of the belt can be further reduced. In addition, the same operation as the invention according to claim 4 is achieved.

In the invention according to claim 7, a part of the plate member is bent from one surface side of the plate member to the other surface side, and the bent portion is pushed back to one surface side, Since it is formed so as to have one convex line and the other convex line protruding from the one surface and the other surface, respectively, the area of the portion contacted by the belt can be made wider than that of the invention according to claim 5. . Therefore, the surface pressure of the folded portion of the belt can be further reduced.

In the invention according to the eighth aspect, the strength of the short edge portion can be improved by providing the short edge portion with the ridge. Therefore, even if the belts gather at the short edge and the force concentrates on the short edge, the safety of the short edge can be improved more than ever. In addition, when the entire edge other than the one long edge has a ridge, the strength around the long hole can be improved.

According to the ninth aspect of the present invention, the operation as described above is achieved, and since the short edge portion is formed in the curved shape of an arc, the stress concentration at the short edge portion can be relaxed. You can

According to the tenth aspect of the invention, the contact area of the belt that abuts one of the long edges can be increased by the ridge. Therefore, the surface pressure of the belt can be reduced. Note that the surface pressure of the belt can be reduced most when the convex shape is configured to project from both sides of the one surface and the other surface.

The invention according to claim 11 has the same operation as the invention according to claim 8.

According to the twelfth aspect of the invention, the corner of one long edge is formed round along the direction in which the belt is folded back, so that the belt is prevented from being damaged at this corner. be able to. Moreover, since the corners are rounded, and it is not necessary to coat the corners with a coating such as PVC or polyethylene, the cost required for such a coating can be reduced. That is, cost can be reduced.

In the thirteenth aspect of the invention, since the protruding amount of the ridge from the plate-shaped member is formed to be 15% to 60% of the plate thickness of the plate-shaped member, it is in contact with one long edge portion. The contact area of the belt can be increased. 15% like this
As for the magnification of 60%, as in the invention according to claim 5 or claim 7, the elongated hole portion is formed by bending,
Alternatively, it is possible by molding with burring as in the invention according to claim 15.

In the fourteenth aspect of the present invention, since the shearing edge portion (burr) generated in the piercing step is removed in the face pressing step, the ridge can be made to stick out neatly in the burring step, and In the curved surface forming step, the convex corners can be beautifully formed into a curved surface.

According to the fifteenth aspect of the present invention, the edge portion of the long hole on the side opposite to the convex stripe can be smoothly rounded with a larger radius of curvature by the restructuring process. For this reason, since the corners can be rounded in a series of pressing steps for forming the belt mounting bracket, there is no need to perform finishing or coating in a separate step. Therefore, cost can be reduced.

[0041]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. First, a first embodiment of the present invention will be described with reference to FIGS.

In FIG. 5, S is a vehicle body, D is a driver's seat, and 1 is a seat belt device. A shoulder belt retractor 11 is fixed to the vehicle body S, and a shoulder belt 12 is connected to the retractor 11. A belt mounting bracket A1 is fixed to the vehicle body S on one side of the seat D, and a waist belt 13 is connected to the belt mounting bracket A1. These shoulder belts 12
The waist belt 13 is formed by a single belt. A shoulder belt 12 is provided on the retractor 11 side and a waist belt 13 is provided on the belt mounting bracket A1 side with a tongue 14 provided in the middle as a boundary.

The tongue fitting 14 is adapted to be detachably connected to the buckle 15.
Is connected to another belt mounting bracket A2 via the connection belt 151.
It is designed to be connected to. This belt mounting bracket A
Reference numeral 2 is fixed to the vehicle body S on the opposite side of the belt mounting bracket A1 across the sheet D. Since these belt mounting brackets A1 and A2 have almost the same configuration,
The configuration will be described in detail while using the reference numerals of the belt mounting bracket A1.

As shown in FIGS. 1 and 2, the belt mounting member A1 is formed of a plate-shaped substrate (plate-shaped body) 2, and is bent slightly at the bent portion 2a to form a "U" shape. With the bent portion 2a as a boundary, one side is a fixed plate portion 21 and the other side is a winding plate portion 22.
Bolt holes 3 are formed in the fixing plate portion 21, and a plurality of curved ridges 31 are formed radially and equidistantly at the periphery of the bolt holes 3 (in the case of this embodiment). Are formed three). Each curved ridge 31 is formed so as to project from one surface side of the substrate 2 to the other surface side by press working. Note that the number of the curved protrusions 31 is not limited, and the curved protrusions 31 may be configured to be provided radially finely like a chrysanthemum.

In the bolt hole 3, as shown in FIG.
The fixing bolt 5 is inserted, and the fixing bolt 5 and the nut 5
1, the board 2 is fixed to the vehicle body S. At this time, the curved ridge 31 acts in the same manner as a spring washer (spring washer), and also acts as a detent due to an increase in friction, thereby helping to securely fix the substrate 2 to the vehicle body S. On the other hand, there is no need to use a spring washer that has always been used in the past, and the required number of parts can be reduced.

On the other hand, the winding plate portion 22 of the substrate 2 is
Slot 6 for inserting and connecting one end of waist belt 13
Has been opened. The waist belt 13 is folded back at one long edge 691 in the long hole 6, and the one long edge 69
1 is applied with tension. One long edge portion 691 receiving the tension is curved such that the central portion in the longitudinal direction projects in the direction opposite to the direction in which the tension is applied. The waist belt 13 is formed by forming a belt-shaped narrow woven fabric in which polyester fibers are woven into a flat shape in the same manner as that shown in the conventional example. It is folded back at the long edge 691, and the folded back portion is sewn to the waist belt 13 to be fixed to the substrate 2.

Further, the other long edge portion 692 facing the one long edge portion 691 is also curved in the same direction as the one long edge portion 691. A portion where one of the long edge portions 691 and the other long edge portion 692 are connected to each other forms arc-shaped short edge portions 7 and 7 that are smoothly continuous.

Then, one of these long edge portions 6 and the other long edge portion 6
The long hole 6 consisting of 91, 692 and short edges 7, 7 is shown in FIG.
It is formed as shown in FIG. That is, the elongated hole 6 has an arc-shaped inner surface 61 extending from one surface 22a side of the substrate 2 to the elongated hole 6 and a convex projecting from the elongated hole 6 toward the other surface 22b in an arc shape. Article 611. The inner surface 61 and the ridge 611 are formed by press working.

In the seat belt device belt mounting member constructed as described above, the central portion of one long edge portion 691 is curved so as to project in the direction opposite to the tension of the waist belt 13. Even if the one long edge portion 691 is elastically deformed in the tension direction, the one long edge portion 691 does not deform in a concave shape in the tension direction. Therefore, the belt does not collect on the concave portion, and the width of the waist belt 13 is always maintained at a normal width. As a result, the tension of the waist belt 13 is always evenly distributed on the one long edge portion 691, so that the strength performance of the waist belt 13 and the belt mounting bracket A1 is improved, and the safety is improved with the improvement of the strength. It is possible to improve the sex.

Since the other long edge portion 692 is also curved like the one long edge portion 691, in order to maintain the flat state of the waist belt 13, the waist belt 13 is centered in the longitudinal direction. When the waist belt 13 is inserted into the long hole 6 while being bent so as to be bent along, the waist belt 13 has a long hole since the shapes of the one and the other long edges 691 and 692 substantially match the curved shape of the waist belt 13. 6 is extremely easy to insert.

Moreover, one and the other long edge portions 691, 6
Since the connecting portions of 92, that is, the short edges 7, 7 are formed in a smooth arc shape, even if both ends along the longitudinal direction of the waist belt 13 are in an arc shape, the waist belt 13 is inflated. There is an advantage that the waist belt 13 can be easily inserted into the long hole 6 without the portion hitting the short edge portions 7. In addition, both ends of the waist belt 13 just fit into the short edges 7, 7, and the waist belt 1
When tension is applied to the belt 3, the waist belt 13 can be stably held at a predetermined position of the slot 6.

Further, the long holes 6 are formed on the one surface 22a of the substrate 2.
An arc-shaped inner surface 61 is formed from the side to the inside of the elongated hole 6,
Since the convex strip 611 that projects in an arc shape from the same long hole 6 to the other surface 22b side is formed, the waist belt 13 folded back at one long hole edge 691 may hit a corner portion and be cut. Can be removed. Moreover, the ridge 6
Since the area where the waist belt 13 contacts is widened by 11, the surface pressure acting on the waist belt 13 can be reduced, and the durability and reliability of the waist belt 13 can be improved.

Furthermore, since the ridges 611 are formed over the entire elongated hole 6, the strength around the elongated hole 6 is improved, and the strength of the entire belt mounting bracket A1 can be improved. . In particular, since the short edge portion 7 can be strengthened, even if the terminal portions of the waist belt 13 gather at the short edge portion 7 and force concentrates on the short edge portion 7, the short edge 7 The safety of the unit 7 can be improved more than ever.

When tension is applied to the waist belt 13,
The waist belt 13 folded back at one long edge 691 comes into close contact with one long edge 691. That is, the folded portion of the waist belt 13 is curved into a shape similar to that of the one long edge portion 691, and the central portion in the width direction has a raised shape. For this reason, the waist belt 13 has one long edge portion 69.
1 is hard to shift in the horizontal direction. Therefore, even if the direction of the tension of the waist belt 13 does not coincide with the direction orthogonal to the one long edge 691, the waist belt 13 is shifted laterally along the one long edge 691, and the end of the long hole 6 It will not be gathered in the club.

Further, since the central portion of the waist belt 13 in the width direction has a raised shape like the one long edge portion 691, the waist belt 13 is always in a state of being widened in the width direction. Therefore, even when the waist belt 13 tries to converge so as to become thin due to the tension acting on the waist belt 13, the width of the waist belt 13 is maintained at the original wide state at the one long edge portion 691. It will be. That is, the waist belt 13 does not gather at a part on one long edge 691. As described above, the width of the belt folded portion is appropriately maintained at one of the long edges, so that the tension of the belt is uniformly transmitted to the one long edge, and the durability and durability of the belt are improved. Safety can be improved with the improvement of the strength performance of the belt mounting bracket.

Next, a second embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. This embodiment is different from the first embodiment in that the shape of the long hole 6 is different, and the other points are the same as those in the first embodiment, and therefore the description thereof is omitted.

That is, one and the other long edge portions 691,
The long hole 6 composed of the short edge portions 692 and the short edge portions 7
As shown in (a), (b), and (c), a portion corresponding to the long hole 6 is formed into a concave shape by a plurality of press workings, and then the bottom of the concave portion is pulled out to form one of the substrates 2. Surface 22a
Is formed on the other surface 22b side. At this time, a curved surface R1 curved in an arc shape is formed from the one surface 22a to the inner surface of the protruding piece 23. And
As shown in FIG. 6D, the tip of the protruding piece 23 is further pressed by the press forming (curling) to the other surface 22b.
Wrap to get closer to. Thereby, the other surface 22b
A ridge 611 that protrudes greatly on the side is formed,
A smoothly curved surface R2 is formed from the inner surface of the long hole 6 to the ridge 611.

Therefore, in the seat belt device metal fitting of the above structure, since the elongated hole 6 is formed by drawing the substrate 2, the height of the ridge 611 becomes particularly high. The area of the one long edge portion 691 with which the waist belt 13 abuts is wider than in the case of the first embodiment. Therefore, the surface pressure acting on the waist belt 13 is reduced, and the durability of the waist belt 13 and the safety can be further improved. Also, one long edge 6
Curved surfaces R1 and R2 are formed at the corners where the waist belt 13 is folded in 91, respectively.
There is no danger that the sheet is rubbed and cut at one long edge 691. The other operations and effects are the same as those of the first embodiment.

Next, a third embodiment of the present invention will be described with reference to FIGS. However, components common to those of the first embodiment shown in FIGS. 1 to 5 are denoted by the same reference numerals, and description thereof will be simplified.

As shown in FIG. 7, the belt mounting member A1 is bent at a substantially right angle at the bent portion 2a, and a long hole 6 is formed in the winding plate portion 22. The elongated hole 6 is formed with one protruding ridge 611a and the other protruding 611b protruding toward one surface 22a and the other surface 22b, respectively. That is, the elongated hole 6 is formed such that the width of the inner surface is formed thick by the one ridge 611a and the other ridge 611b, and the area of one long edge portion 691 with which the waist belt 13 contacts is formed to be large. .

Further, the one convex line 611a and the other convex line 611b form a part of the substrate 2 on one surface 22a of the substrate 2.
By bending (burring) from one side to the other surface 22b side, a protruding ridge protruding from the other surface 22b is formed, and the protruding ridge is moved to the one surface 22a side by a press, thereby forming one surface. 22a and the other surface 2
It is formed so as to project to the side 2b. Therefore, the amount of projection of the one ridge 611a and the other ridge 611b is determined by the amount by which the substrate 2 is first bent (extended amount). In addition, each ridge 611
a and 611b have rounded tips. That is, regarding one long edge portion 691, the corner portion is formed to be round along the direction in which the waist belt 13 is folded. Further, C.sub.
A chamfer 2b is formed. Further, on the substrate 2, a mark S 10 is formed around the bolt hole 3.

The belt mounting bracket A constructed as described above
In FIG. 1, since the amount of protrusion of each of the one ridge 611 a and the other ridge 611 b can be increased in accordance with the amount of bending (overhang) of the substrate 2, the waist at one long edge 691 can be reduced. The area of the portion where the belt 13 contacts can be made sufficiently large as needed. Therefore, the surface pressure acting on the waist belt 13 from the one long edge portion 691 can be sufficiently reduced, and the safety is improved with the improvement of the durability of the waist belt 13 and the strength performance of the belt mounting bracket A1. be able to.

Further, each of the ridges 611a and 611b is formed in a round shape, and the corners of the ridge are formed in a round shape along the direction in which the waist belt 13 is folded back at one long edge portion 691. Therefore, the waist belt 1
3 can be prevented from being damaged. Moreover,
Since the corners of the ridges are rounded and it is not necessary to coat PVC or polyethylene on these ridges,
The cost required for such a coating process can be reduced. That is, cost can be reduced.

Next, a method of manufacturing the belt mounting bracket A1 having the above-described structure will be described.

First, as shown in FIG. 8 as the first step,
A die K1 and a punch K are formed on a steel sheet S as a material of the substrate 2.
The first pilot hole S1 for forming the long hole 6 is formed by using the second hole 2. Next, as shown in FIG. 9, as a second step, an arc-shaped roundness S1a is formed from the upper portion of the first pilot hole S1 to the upper surface of the steel plate S using the molds K3 and K4.
Further, as a third step, as shown in FIG.
Then, using the mold K6, an arc-shaped roundness S1b is formed from the lower portion of the first pilot hole S1 to the lower surface of the steel plate S.

Next, as a fourth step, as shown in FIG. 11, by using a mold K7 and a mold K8, the portion of the first pilot hole S1 is curved above the steel plate S (burring process).
A second pilot hole S2 is formed. Then, as a fifth step, as shown in FIG. 12, the mold K9, the mold K10, and the mold 11
Then, the portion of the second pilot hole S2 protruding upward is pressed downward to form convex portions S3 and S4 protruding from the upper and lower surfaces of the steel sheet S at substantially the same height.

Further, as a sixth step, as shown in FIG. 13, by using the mold K12 and the mold K13, the convex portion S3 protruding upward is finished so as to draw a smooth curved surface as a whole (restructuring). . At this time, the surface of the second pilot hole S2 is also finished cleanly. Next, as a seventh step, as shown in FIG. 14, using a mold K14 and a mold K15, the protruding portion S4 protruding downward is finished so as to draw a smooth curved surface as a whole (rest-like processing). Also in this case, the surface of the second pilot hole S2 is finished cleanly. Then, the elongated hole 6 is formed by the second prepared hole S2 thus finished, and the one ridge 611a and the other ridge 611a are formed by the protrusions S3 and S4.

Next, as an eighth step, as shown in FIG. 15, a mold K21, a punch K22, and marking dies K23 and K2.
4, a bolt hole 3 is made in the steel plate S, and a mark is formed around the bolt hole 3. Then, FIG.
As shown in the figure, the bolt hole 3 is drilled, and the state where the mark S10 is carved is obtained. Further, as shown in FIG. 17, as a ninth step, the outer periphery of the belt mounting bracket is cut using dies K25, K26 and K27 (trim processing).
At this time, since the cut steel sheet S enters the mold K27,
It is ejected by the ejector device K28. Then, a shape close to the belt mounting bracket as shown in FIG. 18 is obtained. Next, as a tenth step, as shown in FIG.
9 and a mold K30 are used to form a C chamfer 2b. Then, as shown in FIG. 20, the C-chamfer 2b is formed on the belt mounting bracket. Then, as shown in FIG. 21, as an eleventh step, the steel sheet S serving as the belt mounting bracket is bent at a substantially right angle along the bent portion 2a using the mold K31 and the mold 32. Thereby, as shown in FIG. 22, the belt mounting bracket A1 is completed.

As described above, the belt mounting member A1 is formed by pressing the steel plate S. Further, the method of manufacturing the belt mounting bracket A1 has been described as being divided into 11 steps as described above. However, in practice, the method is further divided into more steps, and a method of forming while gradually deforming is employed.

In the third embodiment, the ridges are formed so as to project to both the one surface 22a side and the other surface 22b side of the substrate 2, but the ridges are formed on one surface 22a. It may be formed so as to project only on one side of the other surface 22b. The method of forming the ridge protruding only on one side follows the fourth step shown in FIG.
The fifth to seventh steps shown in FIGS. 23 to 25 may be performed.

That is, according to the fourth step shown in FIG.
After bending the first pilot hole S1 above the steel plate S to form the second pilot hole S2, as shown in FIG. 23, as a fifth step, using the die K15 and the die K16. Then, the portion of the second pilot hole S2 protruding upward is pressed downward to form a convex portion S3 protruding from the upper surface of the steel sheet S to a substantially constant height.

Further, as a sixth step, as shown in FIG. 24, a die K17 and a die K18 are used to finish the edge S5 on the opposite side of the convex portion S3 protruding upward so as to draw a smooth curved surface. At this time, the surface of the second pilot hole S2 is also finished cleanly. Next, as a seventh step, as shown in FIG.
Using the mold K19 and the mold K20, the convex portion S3 protruding upward is finished so as to draw a smooth curved surface as a whole. Also in this case, the surface of the second pilot hole S2 is finished cleanly. The elongated hole 6 is formed by the second prepared hole S2 thus finished. In addition, the protrusion S3 forms a protrusion 611 protruding, for example, on the other surface 22b side of the belt mounting bracket A1.

In the first to third embodiments described above, the configurations of the belt mounting member A1 and the waist belt 13 are described in detail, but the belt mounting member A2 and the connecting belt 151 are also attached to the belt mounting member A1. And the waist belt 13 have the same structure. Further, the belt is not limited to the waist belt 13 and the connecting belt 151, and may be the shoulder belt 12 or other belts.
Further, in each of the above-described embodiments, the belt is formed by forming a tubular member into a flat shape, but the belt may be formed simply into a flat plate shape.

Further, the other long edge portion 692 is also configured to be curved similarly to the one long edge portion 691, but the other long edge portion 692 is formed in a straight line shape or its other shape. May be However, the other long edge portion 692
Also, it is preferable that the belt be formed so as to be curved substantially in the same manner as the one long edge portion 691 in order to make it easy to insert the belt into the long hole.

Further, although the ridge 611 is formed on the entire long hole 6, it may be formed only on one long edge portion 691, that is, only on the portion where the waist belt 13 or the like contacts. . In addition, the short edge portion 7 does not necessarily need to be formed in an arc shape, but in order to facilitate insertion of the waist belt 13 and the like and to reduce stress concentration applied to this portion, an arc-shaped curved shape is used. It is preferable to form it.

Further, the one or the other long edge portions 691 and 692 in the second embodiment are configured so as to form the curved surfaces R1 and R2 only at both end portions thereof, but the entire inner surface including both end portions is circular. It may be formed into a curved surface such as an arc shape or an elliptical shape.

Furthermore, the one long edge portion 691 is curved so that the central portion in the longitudinal direction projects in the direction opposite to the direction in which tension is applied.
May be formed so as to swell in the direction opposite to the tension of the belt from both ends in the longitudinal direction toward the center. That is, as long as the central portion in the longitudinal direction of one long edge portion 691 is raised with respect to both ends, the central portion may be flat as shown in FIG.

Next, a fourth embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. However, the first shown in FIGS.
Elements common to the constituent elements of the embodiment are denoted by the same reference numerals, and description thereof will be simplified. This fourth embodiment is the first
The difference from the embodiment is that one long edge 691 and the other long edge 692 of the long hole 6 are formed in a straight line.

That is, as shown in FIG. 28 (a), the long holes 6 are formed long in parallel. In addition, the ridge 611
Is formed only on one long edge portion 691. Then, as shown in FIG. 28B, the protruding ridges 611 are formed so as to protrude only on the other surface 22 b side of the substrate 2. In addition, as shown in FIG. 28C, the protruding strips 611 are formed as one protruding strip 611a and the other protruding strip 611b so as to protrude from the one surface 22a and the other surface 22b of the substrate 2, respectively. May be.

Belt mounting bracket A constructed as described above
In No. 1, with respect to the configuration of the ridges 611, the one ridge 611a, and the other ridge 611b, the same operational effects as those of the first embodiment are obtained.

Next, a fifth embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. However, components common to those of the fourth embodiment shown in FIG. 28 are denoted by the same reference numerals, and description thereof will be simplified. The difference between the fifth embodiment and the fourth embodiment is that the ridge 611 has one long edge portion 691.
And two short edge portions 7 and 7.

That is, as shown in FIG. 29 (a), the protrusion 611 has one long edge portion 691 and two long edge portions 691 in the long hole 6.
It is formed so as to wind the two short edges 7,7. Then, as shown in FIG. 29B, the protruding ridges 611 are formed so as to protrude only on the other surface 22b side of the substrate 2. As shown in FIG. 29C, the ridges 611 are formed as one ridge 611a and the other ridge 611b so as to protrude from the one surface 22a and the other surface 22b of the substrate 2, respectively. You may.

Belt mounting bracket A constructed as described above
In No. 1, the short edges 7, 7 can be reinforced by the ridges 611 and the one ridge 611a and the other ridge 611b. In addition, the same functions and effects as those of the fourth embodiment are provided.

Next, a sixth embodiment of the present invention will be described with reference to FIG.
This will be described with reference to 0. However, components common to those of the fourth embodiment shown in FIG. 28 are denoted by the same reference numerals, and description thereof will be simplified. The difference between the sixth embodiment and the fourth embodiment is that the ridge 611 has one long edge portion 69.
1 is that it is formed at the other long edge 692 and two short edges 7, 7.

That is, the ridges 611 are formed over the entire circumference of the elongated hole 6 as shown in FIG. Then, as shown in FIG. 30B, the protruding ridges 611 are formed so as to protrude only on the other surface 22 b side of the substrate 2. Note that this ridge 611 is the same as FIG.
As shown in (c), the one protrusion 611a and the other protrusion 611b may be formed so as to protrude from the one surface 22a and the other surface 22b of the substrate 2, respectively.

Belt mounting bracket A constructed as described above
In 1, the entire elongated hole 6 can be reinforced by the ridge 611, one ridge 611 a, and the other ridge 611 b. In addition, the same operation and effect as those of the fourth and fifth embodiments are provided.

Next, a method for manufacturing a belt mounting member as a seventh embodiment of the present invention will be described with reference to FIGS. The belt mounting bracket A1 to be manufactured is shown in FIG.
32 are configured as shown in FIGS.
The configuration is almost the same as that of the first embodiment shown in FIG. 7 and that of the third embodiment shown in FIG. Therefore, the same reference numerals are given to the same components as those in the first and third embodiments, and the description will be simplified.

The belt mounting member A1 is manufactured by a set of press machines that automatically and continuously perform the work of each step shown in FIGS.

First, the coiled steel sheet S, which is the material of the substrate 2, is successively fed into the press machine while being corrected into a planar shape.

Then, first, the piercing process P1 (see FIG.
), The pilot hole S1 of the long hole 6 is punched out of the steel plate S, and the positioning hole H1 is punched out. At this time, FIG.
As shown in (a), burrs S1a are generated on one surface Sa side of the steel sheet S by punching the prepared hole S1.

Next, the surface pressing step P2 (see FIG. 33)
Then, the burrs S1a generated in the piercing step P1 are pressed and removed by surface pressing. As a result, FIG.
As shown in (2), a beautiful state without burrs S1a is obtained.

Then, the next burring process P3 (see FIG.
3), a punch larger than the prepared hole S1 is pushed into the prepared hole S1 to form the elongated hole 6, and a part of the steel sheet S is protruded along the elongated hole 6 to form the ridge 611.
Is molded. As a result, as shown in FIG. 37 (c),
A ridge 611 protruding from the other surface Sb of the steel plate S is formed. However, the ridge 611 in this state is in a state where a corner is left.

Next, the curved surface forming step P4 (see FIG. 34)
Then, the ridges 611 formed in the burring step P3 are pressed against the surface to form rounded corners. As a result, FIG.
As shown in (d), the corners of the ridge 611 are rounded.

Next, in the rest-like process P5 (see FIG. 34), the edge portion 6 of the elongated hole 6 on the side opposite to the ridge 611 is formed.
a (see FIG. 37 (e)) is pressed to form the same edge 6a into a curved surface having a larger radius of curvature. That is, FIG.
It is formed as shown in FIG.

Next, in a cut marking step P6 (see FIG. 34), the periphery of the portion that needs to be bent is cut, and the marking S10 is formed at a predetermined position.

Next, the C surface pushing step P7 (see FIG. 35)
Then, the corners of the portions cut in the above-described cut marking step P6 are obliquely surface pressed to form the C chamfer 2b.

Next, the venting step P8 (see FIG. 35)
Then, the part that needs to be bent and formed in the above-described cut marking step P6 is bent with respect to the other steel sheet S parts.
Thereby, the bent portion 2a is formed on the steel plate S.

Next, the piercing process P9 (see FIG. 35)
Then, a bolt hole 3 is punched in the steel plate S.

Next, in a separate step P10 (see FIG. 36), the portion cut in the cut marking step P6 is cut so as to be continuous, and the belt mounting metal piece A1 having a predetermined shape is cut off. That is, the belt mounting bracket A1 shown in FIGS. 31 and 32 is completed.

Belt mounting bracket A1 constructed as described above
In the manufacturing method of (1), since the burrs generated in the piercing step P1 are removed in the face pressing step P2, the ridges 611 can be neatly protruded in the burring step P3, and in the curved surface forming step P4, Article 61
1 can be formed into a beautifully curved surface. Further, by the restriking process P5, the edge 6a of the long hole 6 on the side opposite to the ridge 611 can be smoothly and roundly formed with a larger radius of curvature. Accordingly, the corners of the long hole 6 can be rounded only by the press machine, so that the finishing (barrel polishing) is performed in a separate step.
Or the need for coating. Therefore, cost can be reduced. In addition, after each of the steps of the press machine including the cutting and stamping step P6, the C-face pressing step P7, the venting step P8, the piercing step P9, and the separating step P10 after the restriking step P5, the belt mounting bracket A1 as a single unit is completed. Are completed automatically and continuously. Therefore, the belt mounting bracket A1 can be manufactured continuously and efficiently.

The ridges 611 are formed by burring.
Since a part of the steel sheet S is protruded, it can be greatly projected from the substrate 2. Then, as shown in FIG. 32, the protrusion amount H of the ridge 611 is equal to the plate thickness T of the substrate 2.
It can be formed at 5% to 60%. Therefore, the contact area between the belt and the mounting bracket can be increased, and the surface pressure applied to the belt can be reduced.

In addition to the burring step P3, by carrying out the method of FIGS. 12 to 14 shown in the third embodiment, one surface 22a of the substrate 2 and the other surface 2 of the substrate 2 are processed.
It is possible to form one convex strip 611a and the other convex strip 611b that respectively project from 2b. In this case, the protrusion amount H of each of the protrusions 611a and 611b can be formed to be 15% to 60% of the thickness T of the substrate 2 as shown in FIG. In the manufacturing method according to the third embodiment, the protrusion amount H of each of the ridges 611, 611a and 611b is also set.
Is 15% to 6% of the plate thickness T of the substrate 2 as shown in FIG.
It can be formed to 0%.

Furthermore, the belt attachment fittings A1 and A2 shown in the fourth, fifth and sixth embodiments.
Can also be manufactured by employing the manufacturing method of the seventh embodiment or a method obtained by adding the method of FIGS. 12 to 14 to this manufacturing method. Also in this case, each ridge 61
The protrusion amount H of 1, 611a, 611b is the plate thickness T of the substrate 2.
15% to 60%.

As described above, the protrusion amount H of the ridges is set to 15% to 60% of the plate thickness T of the substrate. The reason is that if the protrusion amount H is less than 15% of the plate thickness T, the desired effect is obtained. If the protrusion amount H exceeds 60% of the plate thickness T, the cost of forming the ridges may be significantly increased, and cracks may occur in the ridges during the forming. Because there is no.
The protrusion amount H is preferably 20% to 50% of the plate thickness T.

[0105]

According to the first and second aspects of the invention, when tension is applied to the belt, the portion of the belt folded back at one long edge portion comes into close contact with the one long edge portion. That is, the folded-back portion of the belt has a shape in which the central portion in the width direction thereof is raised like the one long edge portion. Therefore, the belt is in a state in which it is unlikely to shift laterally along the one long edge portion. Therefore, even if the tension direction of the belt does not coincide with the direction orthogonal to the one long edge portion, the belt is not laterally displaced along the one long edge portion and does not gather at the end portion of the long hole. .

Further, since the central portion in the width direction of the belt has a raised shape like the one long edge portion, the belt is always in a state of being widened in the width direction. Therefore, due to the tension applied to the belt, the width of the belt is maintained at its original wide state at one of the long edges even when the belt itself tries to converge so as to become thin.
That is, the belt does not collect on one of the long edges. Moreover, because one long edge is raised in the direction opposite to the tension, the tension of the belt causes
Even if one long edge is slightly elastically deformed in the direction of tension,
This one long edge does not have a concave shape. Therefore, the belt does not collect in the concave portion of the one long edge. From the above, the belt width is properly maintained at one of the long edges, so that the tension of the belt is evenly transmitted to the one of the long edges, and the durability of the belt and the belt mounting bracket is improved. As a result of improving the durability and improving the durability, it is possible to improve the safety.

When the belt is formed by crushing a tubular member into a flat shape, the belt is bent along the longitudinal centerline of the belt in order to maintain the flat state of the belt. Bending is effective. Then, even when the belt is inserted into the long hole while being curved as described above, the central portion of one long edge portion is formed to be raised, and the curved shape of the belt and the shape of the one long edge portion Are substantially coincident with each other, so that the left and right ends of the belt are less likely to contact the ends of one long edge. Moreover, the rounded and bulged portions at both ends of the belt are less likely to hit one long edge portion. Therefore, it becomes easy to insert the belt into the long hole.

In the invention according to claim 3, since the other long edge portion facing the one long edge portion is also formed so as to follow the shape of the one long edge portion, it is curved as described above. Since the shapes of the one and the other long edge portions substantially match the shape of the belt, it becomes easier to insert the belt into the long hole than described above.

Particularly, in the invention according to claim 9, the short edge portion connecting one long edge portion and the other long edge portion is
Since it is formed in an arcuate curved line that is smoothly continuous from each of the one and the other long edges, the rounded and bulged portions at both ends of the belt are less likely to hit the short edges. That is, there is an advantage that it becomes easier to insert the belt into the long hole.

According to the fourth aspect of the invention, since the plate-like member has a convex shape protruding from one surface, the contact area of the belt that abuts one of the long edges is large. Therefore, the surface pressure of the belt can be reduced. further,
Since the corner portion of one long edge portion is formed round along the direction in which the belt is folded back, it is possible to prevent the belt from being damaged at this corner portion. Moreover, since the corners are rounded, and it is not necessary to coat the corners with a coating such as PVC or polyethylene, the cost required for such a coating can be reduced. That is, cost can be reduced.

In the invention according to claim 5, a part of the plate-shaped body is bent from one surface side of the plate-shaped body to the other surface side to form a ridge protruding from the other surface. Therefore, the ridge can be made to largely protrude from the other surface. Therefore, it is possible to increase the area where one of the long edges hits the belt. That is, the surface pressure acting on the belt from one long edge can be sufficiently reduced. Therefore, it is possible to improve the durability of the belt and the strength of the belt mounting bracket, and to improve the safety with the improvement of the durability and the strength. Further, since the corner portion of the one long edge portion is formed round along the direction in which the belt is folded back, it is possible to prevent the belt from being damaged at this corner portion. Moreover, since the corners are rounded, and it is not necessary to coat the corners with a coating such as PVC or polyethylene, the cost required for such a coating can be reduced. That is, cost can be reduced.

According to the sixth aspect of the present invention, since the plate-shaped body is formed to have one ridge and the other ridge protruding from one surface and the other surface, respectively, The contact area of the belt that abuts on one of the long edge portions becomes larger than that of the invention. Therefore, the surface pressure of the belt can be further reduced. In addition, the same operation as the invention according to claim 4 is achieved.

In the invention according to claim 7, a part of the plate-like body is bent from one surface side of the plate-like body to the other surface side, and the bent portion is pushed back to one surface side, Since it is formed so as to have one convex line and the other convex line protruding from the one surface and the other surface, respectively, the area of the portion contacted by the belt can be made wider than that of the invention according to claim 5. . Therefore, the surface pressure of the folded portion of the belt can be further reduced.

In the invention according to claim 8, the convex edge is also provided on the short edge portion, whereby the strength of the short edge portion can be improved. Therefore, even if the belts gather at the short edge and the force concentrates on the short edge, the safety of the short edge can be improved more than ever. In addition, when the entire edge other than the one long edge has a ridge, the strength around the long hole can be improved.

According to the ninth aspect of the present invention, the operation as described above is achieved, and since the short edge portion is formed in the shape of a curved arc, the stress concentration at the short edge portion can be relaxed. You can

According to the tenth aspect of the invention, the contact area of the belt that abuts one of the long edges can be increased by the ridge. Therefore, the surface pressure of the belt can be reduced. Note that the surface pressure of the belt can be reduced most when the convex shape is configured to project from both sides of the one surface and the other surface.

The invention according to claim 11 has the same operation as the invention according to claim 8.

According to the twelfth aspect of the invention, since the corner of one long edge is formed round along the direction in which the belt is folded back, the belt is prevented from being damaged at this corner. be able to. Moreover, since the corners are rounded, and it is not necessary to coat the corners with a coating such as PVC or polyethylene, the cost required for such a coating can be reduced. That is, cost can be reduced.

According to the thirteenth aspect of the present invention, since the protruding amount of the ridge from the plate-shaped member is formed to be 20% to 50% of the plate thickness of the plate-shaped member, it contacts one of the long edge portions. The contact area of the belt can be increased. 20% like this
As for the magnification of up to 50%, as in the invention according to claim 5 or 7, the part of the long hole is formed by bending,
Alternatively, it is possible by molding with burring as in the invention according to claim 15.

In the fourteenth aspect of the present invention, since the shearing edge portion (burr) generated in the piercing step is removed in the face pressing step, the ridge can be made to stick out neatly in the burring step, and In the curved surface forming step, the convex corners can be beautifully formed into a curved surface.

According to the fifteenth aspect of the present invention, the edge portion of the elongated hole on the side opposite to the ridge can be smoothly rounded with a larger radius of curvature by the re-strike process. For this reason, since the corners can be rounded in a series of pressing steps for forming the belt mounting bracket, there is no need to perform finishing or coating in a separate step. Therefore, cost can be reduced.

[Brief description of drawings]

FIG. 1 is a front view of a belt mounting bracket shown as a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the belt mounting bracket taken along the line II-II in FIG. 1;

FIG. 3 is a diagram showing the belt mounting bracket, and is an enlarged view of a part III in FIG. 2;

FIG. 4 is a diagram showing the belt mounting bracket, and is a cross-sectional view taken along line IV-IV in FIG. 1;

FIG. 5 is an explanatory view showing a use state of the belt mounting bracket in an automobile.

FIG. 6 is a sectional view of a belt mounting bracket shown as a second embodiment of the present invention.

FIG. 7 is a perspective view of a belt mounting bracket shown as a third embodiment of the present invention.

FIG. 8 is an explanatory view showing a first manufacturing process when manufacturing the belt mounting bracket.

FIG. 9 is an explanatory diagram showing a second manufacturing step when manufacturing the belt mounting bracket.

FIG. 10 is an explanatory view showing a third manufacturing process when manufacturing the belt mounting bracket.

FIG. 11 is an explanatory diagram showing a fourth manufacturing process when manufacturing the belt mounting member.

FIG. 12 is an explanatory view showing a fifth manufacturing process when manufacturing the belt mounting bracket.

FIG. 13 is an explanatory view showing a sixth manufacturing process when manufacturing the belt mounting member.

FIG. 14 is an explanatory diagram showing a seventh manufacturing process when manufacturing the belt mounting member.

FIG. 15 is an explanatory diagram showing an eighth manufacturing process when manufacturing the belt mounting member.

FIG. 16 is a view showing the same belt mounting member, which is an explanatory view showing the shape after the eighth manufacturing step.

FIG. 17 is an explanatory view showing a ninth manufacturing step when manufacturing the belt mounting bracket.

FIG. 18 is a view showing the same belt mounting member, which is an explanatory view showing the shape after the ninth manufacturing step.

FIG. 19 is an explanatory diagram showing a tenth manufacturing step when manufacturing the belt mounting member.

FIG. 20 is a view showing the same belt mounting member,
It is explanatory drawing which shows the shape after the manufacturing process.

FIG. 21 is an explanatory view showing an eleventh manufacturing step when manufacturing the belt mounting bracket.

FIG. 22 is a view showing the belt mounting bracket, and is an eleventh embodiment.
It is explanatory drawing which shows the shape after the manufacturing process.

FIG. 23 is an explanatory view showing a fifth manufacturing process when manufacturing the belt mounting bracket shown as another example of the third embodiment.

FIG. 24 is an explanatory view showing a sixth manufacturing step when manufacturing the same belt mounting member.

FIG. 25 is an explanatory view showing a seventh manufacturing step when manufacturing the belt mounting member.

FIG. 26 is a front view of a belt mounting bracket shown as another example of the first, second, and third embodiments.

FIG. 27 is a front view of a belt mounting member shown as another example of the first embodiment, the second embodiment, and the third embodiment.

FIGS. 28A and 28B are views of a belt mounting bracket shown as a fourth embodiment of the present invention, wherein FIG. 28A is a front view, FIG. 28B is a sectional view, and FIG. 28C is another example of FIG. FIG.

FIGS. 29A and 29B are views of a belt mounting bracket shown as a fifth embodiment of the present invention, where FIG. 29A is a front view, FIG. 29B is a cross-sectional view, and FIG. 29C is another example of FIG. FIG.

FIGS. 30A and 30B are views of a belt mounting bracket shown as a sixth embodiment of the present invention, wherein FIG. 30A is a front view, FIG. 30B is a sectional view, and FIG. 30C is another example of FIG. FIG.

FIG. 31 is a perspective view of a belt mounting bracket manufactured by the manufacturing method shown as the seventh embodiment of the present invention.

FIG. 32 is a sectional view of a belt mounting bracket manufactured by the same manufacturing method.

FIG. 33 is a plan view of a steel plate showing respective steps from a piercing step P1 to a burring step P3 in the same manufacturing method.

FIG. 34 is a plan view of the steel sheet, showing each step from the curved surface forming step P4 to the cut marking step P6 in the same manufacturing method.

FIG. 35 is a plan view of a steel plate showing respective steps from a C-plane pushing step P7 to a piercing step P9 in the same manufacturing method.

FIG. 36 is a plan view of the steel plate showing a separate step P10 in the manufacturing method.

FIG. 37 is a view showing a cross section of the steel sheet in the same manufacturing method, where (a) is a cross-sectional view of the steel sheet in a piercing step P1;
(B) is a sectional view of the steel plate in the surface pressing step P2, (c)
FIG. 6 is a cross-sectional view of the steel sheet in the burring step P3, (d) is a cross-sectional view of the steel sheet in the curved surface forming step P4, and (e) is a cross-sectional view of the steel sheet in the restructuring step P5.

FIG. 38 is a front view of a belt mounting bracket shown as a conventional example.

FIG. 39 is a sectional view of the belt mounting bracket.

[Explanation of symbols]

 2 plate-like body (substrate) 22a one surface 22b the other surface 6 long hole 7 short edge 61 inner surface 611 ridge 611a one ridge 611b the other ridge 691 one long edge 692 the other long edge 13 Belt (waist belt) 151 Belt (connection belt) A1 Belt mounting bracket A2 Belt mounting bracket

Claims (15)

[Claims] 1. A belt mounting bracket for a seat belt device, which is formed by a plate-shaped body, wherein the plate-shaped body is formed with elongated holes into which belts are inserted, the elongated holes facing each other. The belt is folded back at one of the long edges to receive the tension of the belt, and the one long edge extends from both ends in the longitudinal direction toward the central portion. A belt mounting bracket for a seat belt device, which is formed so as to rise up. 2. A belt mounting bracket for a seat belt device, which is formed by a plate-shaped member having an elongated hole, wherein a belt is inserted into the elongated hole and at least one of long edges of the elongated hole facing each other. In a belt mounting bracket for a seat belt device configured to receive the tension of the belt at the one long edge portion by folding back the belt at the one long edge portion, the one long edge portion is A belt mounting bracket for a seat belt device, which is formed so as to rise in a direction opposite to the tension of the belt from both ends toward the center. 3. The seat belt device according to claim 1, wherein the other long edge portion facing the one long edge portion is also formed along the one long edge portion. Belt mounting bracket for. 4. One of the long edges is formed to have a ridge protruding from one surface of the plate-like body, and the corners are rounded along the direction in which the belt is folded back. The belt mounting bracket for a seat belt device according to claim 1, 2 or 3. 5. One of the long edges has a ridge protruding from the other surface of the plate by bending a part of the plate from one surface side to the other surface side. The formed area is such that the contact area of the belt is widened by the ridges, and the corners are rounded along the direction in which the belt is folded back. The belt mounting bracket for a seat belt device according to claim 2 or claim 3. 6. One long edge portion is formed so as to have one ridge and the other ridge protruding from one surface and the other surface of the plate-like body, respectively, and in the direction in which the belt is folded back. The belt mounting bracket for a seat belt device according to claim 1, 2 or 3, wherein the corners are rounded. 7. The one long edge portion is formed by bending a part of the plate-shaped body from one surface side of the plate-shaped body to the other surface side and pushing back the bent portion to one surface side. It is formed so as to have one convex line and the other convex line protruding from one surface and the other surface, respectively, and the belt contact area is formed wide by these one convex line and the other convex line. The belt mounting bracket for a seat belt device according to claim 1, 2 or 3, wherein the corner portion is rounded along the direction in which the belt is folded back. 8. An edge portion other than one long edge portion of the long hole, wherein a short edge portion connecting at least one long edge portion and the other long edge portion has the same protrusion as that of the one long edge portion. The belt mounting bracket for a seat belt device according to claim 4, claim 5, claim 6 or claim 7, wherein the belt mounting bracket is formed to have a strip. 9. A short edge portion connecting one long edge portion and the other long edge portion is formed in an arc-shaped curved line smoothly continuous from each of the one long edge portion and the other long edge portion. The belt mounting bracket for a seat belt device according to claim 1, claim 2, claim 3, claim 4, claim 5, claim 6, claim 7, or claim 8. 10. A belt mounting bracket for a seat belt device, which is formed of a plate-shaped body, wherein the plate-shaped body is formed with elongated holes into which belts are inserted, the elongated holes facing each other. One of the long edge portions of the edge portion, the belt is folded back, is configured to receive the tension of the belt, the one long edge portion, one surface and the other surface of the plate-shaped body. A belt mounting bracket for a seat belt device, characterized in that it has a ridge protruding from at least one of the surfaces. 11. An edge portion other than one long edge portion of a long hole, wherein a short edge portion connecting at least one long edge portion and the other long edge portion has a projection similar to one long edge portion. The belt mounting bracket for a seat belt device according to claim 10, wherein the belt mounting bracket is formed to have a strip. 12. The belt mounting bracket for a seat belt device according to claim 10, wherein one of the long edges has a rounded corner along the direction in which the belt is folded back. 13. The projection of each of the ridges is formed to have a protrusion amount from the plate of 15% to 60% of the plate thickness of the plate, and claim 4, claim 5, and claim 5. 6, claim 7, claim 8, claim 9, claim 10, claim 11 or claim 1
The belt mounting bracket for the seat belt device according to 2. 14. A method of manufacturing a belt mounting bracket for a seat belt device, which is formed by a plate-shaped body, wherein the plate-shaped body is formed with an elongated hole into which a belt is inserted, and an edge portion of the elongated hole. In the method for manufacturing a belt mounting bracket for a seat belt device, which has a ridge protruding from one surface of the one surface and the other surface of the plate-shaped body, Piercing process for punching out the pilot hole, and pushing a punch larger than this pilot hole into the pilot hole,
A burring step of forming a long hole and projecting a part of the plate-like body along the long hole to form a ridge, and a surface pressure of the ridge formed in the burring step to round a corner portion. Forming a curved surface forming step for forming a belt mounting bracket for a seat belt device. 15. A method of manufacturing a belt mounting bracket for a seat belt device, which is formed by a plate-shaped body, wherein the plate-shaped body is formed with an elongated hole into which a belt is inserted, and an edge portion of the elongated hole. In the method for manufacturing a belt mounting bracket for a seat belt device, which has a ridge protruding from one surface of the one surface and the other surface of the plate-shaped body, Piercing process for punching out the pilot hole, surface pressing process for removing the shearing edge part (burr) generated by this piercing process by pressing, and pushing a punch larger than this pilot hole into the pilot hole,
A burring step of forming a long hole and projecting a part of the plate-like body along the long hole to form a ridge, and a surface pressure of the ridge formed in the burring step to round a corner portion. A curved surface forming step of forming, a restriking step of smoothly forming an edge of the long hole on the side opposite to the ridge, and a separating step of cutting off as a belt mounting bracket of a predetermined shape. Of manufacturing a belt mounting bracket for a seat belt device.