JPH031176B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a device for inserting and supporting the shoulder portion of a vehicle seat belt attached to an automobile etc. in a height-adjustable manner. The present invention relates to a seat belt anchor device that prevents the mounting position of a belt support member such as a slip anchor from changing when an impact occurs.

(Prior Art) Among the seat belt devices installed in automobiles, etc., those that use a connecting belt for both shoulder and waist use are
In order to accurately attach the seatbelt to the shoulder of the occupant, a seatbelt anchor device is used in which the slip anchor, which inserts and holds the middle part of the seatbelt, is attached to the center pillar of the vehicle body so that its mounting position can be adjusted up and down. There is.

By the way, as shown in FIG. 7, a conventional seat belt anchor device of this type includes a slip anchor 2 that inserts and guides a seat belt B into a vertically long rail member 1 fixed to a vehicle body S of a center pillar.
A slide anchor 3 is movably attached to the top of the slide anchor 3, and an operating knob 4' integrated with the operating knob 4' is movably attached to the top of the slide anchor 3 and is capable of retracting and retracting from the back surface of the slide anchor 3, and is always biased in the projecting direction by a leaf spring 5. A locking pin 4 is provided, and a plurality of locking holes 6 are bored along the longitudinal direction of the rail member 1 into which the tip of the locking pin 4 can be inserted and removed. If necessary, by pulling in the direction of the arrow X and pulling out the locking pin 4 integrated with the locking pin 4 from the locking hole 6 of the rail member 1, the slide anchor 3 can be moved up and down freely and its height can be easily adjusted. The configuration allows for simple operations (see, for example, Japanese Utility Model Publication No. 59-929).

(Problems to be Solved by the Invention) However, as described above, the locking pin 4 is inserted into the locking hole 6 of the rail member 1, and the slide anchor 3
The seat belt anchor device that positions the
Compared to the screw-type anchor devices used before that, it is easier to operate and has the advantage of being able to quickly support the seat belt at an angle that suits the occupant's physique. When a large impact load is applied to the seatbelt, as in the case of There is a risk that the locking pin 4 may come out of the locking hole 6 due to deformation of the attachment part of the locking pin 4 to the slide anchor 3, and the slide anchor 3 and slip anchor 2 may unexpectedly move downward, causing the seat belt to loosen. However, there was still room for further improvement in this regard.

In order to overcome the problem of movement of the slide anchor 3 when such an impact load occurs, the thickness of the metal plate material used for the rail member 1 may be increased,
It is also possible to increase the rigidity of the strength member by increasing the length of the locking hole insertion part of the locking pin 4, but in reality, if the plate thickness of the rail member 1 is increased in this way, the product If the weight increases and processing becomes difficult, and if the length of the locking pin 4 is increased, the gap t between the back surface of the rail member 1 and the vehicle body mounting surface must be increased. First, the anchor device largely protrudes toward the passenger compartment, which deteriorates the comfort of the vehicle and increases the risk of the occupant accidentally hitting his or her head.

The present invention has been made by focusing on the problems that such conventional seat belt anchor devices had, and the present invention has been made by focusing on the problem that the conventional seat belt anchor device had. , when the seat belt is strongly pulled by an impact load and this load acts on the slide anchor, a step portion is formed that can be locked to the opening edge of the locking hole, and the step portion is normally attached to the opening edge of the locking hole. This prevents the locking pin from being locked in the locking hole of the stepped portion, making it easy to insert and remove the locking pin, and deforms when a high load such as during a vehicle collision is applied to the step. By attaching a resin material that allows locking, the connection strength between the locking pin and the rail member is increased without increasing the volume and weight of the rail member or the locking pin, thereby solving the above-mentioned problems. be.

(Means for Solving the Problems) The structure of the present invention for achieving the above object will be explained based on the accompanying drawings, FIGS. 1 and 3, which correspond to embodiments.

Vertical rail member 11 fixed to the vehicle body 16
, a plurality of locking holes 12 are bored along the longitudinal direction, and a slide anchor 19 to which a belt support member 23 such as a slip anchor for inserting and supporting the seat belt B is fixed to the rail member 11 is attached to the rail member 11 in the longitudinal direction. It is installed so that it can be moved along the direction.

The slide anchor 19 has the rail member 1
1 A locking pin 27 that can be inserted into and removed from the locking hole 12 and is always biased by a spring 30 in the locking hole insertion direction.
is attached so as to slide in a direction perpendicular to the direction of movement of the slide anchor 19.

The locking pin 27 has a locking hole fitting portion thereof.
An engaging step portion 35 is provided inwardly leaving a required length portion 33 at the tip of the fitting portion, and a portion 34 having a small cross section is formed continuously from the engaging step portion 35.
The portion 34 with a small cross section prevents the engagement step portion 35 from engaging the rear opening periphery 18 of the locking hole 12 under the normal belt load, and also prevents the belt from being subjected to a predetermined load or more due to a vehicle collision or the like. When an impact load is applied, a resin material 36 is attached that is pushed against the inner surface of the locking hole 12 and deforms, allowing the engaging step portion 35 to lock onto the opening periphery of the locking hole 12. has been done.

(Function) In the seat belt anchor device of the present invention having the above configuration, during normal belt use, the resin material 36 is connected to the opening periphery 18 of the locking hole 12 of the locking step portion 35 of the locking pin 27. The locking pin 27 prevents locking and facilitates insertion and removal of the locking pin 27.
The slide anchor 19 can be moved to a desired height by simply pulling it out against the biasing force of the spring 30, and the slide anchor 19 is positioned by fitting the locking pin 27 into the other locking hole 12. The support height of the seat belt B by the belt support member 23 is ensured. Furthermore, when an impact load of more than a predetermined value is applied to the seat belt B due to a vehicle collision or the like, the resin material 36 may be deformed or destroyed by the force applied to the locking pin 27 via the belt support member 23 and the slide anchor 19. In order to prevent the locking pin 27 from coming off from the locking hole 12 by locking the locking step portion 35 of the locking pin 27 to the opening periphery 18 of the locking hole 12 of the rail member 11, the locking pin 27 slides with the rail member 11. The connection strength with the anchor 19 is greatly improved, preventing the slide anchor 19 from moving unexpectedly, and ensuring proper occupant restraint by the seat belt B.

(Example) Examples of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a side sectional view showing an example of a seat belt anchor device according to the present invention, FIG. 2 is a front view of the same device, and FIG. 3 is an enlarged sectional view taken in the direction of the - arrow in FIG.

In these figures, reference numeral 11 is a vertically long belt-shaped thick metal plate that is press-molded into a square cross section to provide the required bending rigidity, and a plurality of locking holes 12 are drilled along the longitudinal direction. A rail member,
The rail member 11 has mounting bolts 14, 1 inserted into mounting holes 13, 13' drilled at its upper and lower ends.
4' to the vehicle body 16 such as the center pillar through the washers 15, 15', a required gap t is interposed between the rail member rear surface 11a and the mounting surface 16a on the vehicle body 16 side, and the structure is firmly secured. Fixed.

Furthermore, the rail member 11 has an inclined guide surface 17 at the front opening of each of the locking holes 12 to facilitate insertion and removal of a locking pin 27, which will be described later. By pressing the rail member 11 from the rear side at the opening on the side of the rail member, the opening periphery 18 of the locking hole 12 is formed on the rear side of the rail member 11.
1a so that the actual depth l of each locking hole 12 is constant regardless of the plate thickness of the rail member 11, and the corner of the opening periphery 18 forms a substantially right-angled edge. being considered.

Reference numeral 19 denotes collar portions 11 on both side edges of the rail member 11.
The slide anchor 19 is made of a metal plate having a dogleg-shaped cross section and is slidably attached in the longitudinal direction of the rail member 11 while gripping the slide anchors 19 and 11b via a sheet 20 for reducing frictional force. A bolt 25 that rotatably supports a base portion 24 of a slip anchor 23 that slidably guides the shoulder portion of the seat belt B by a slip ring 22 is screwed into the nut 21 fixed to the lower half of the seat belt B. In addition, a sleeve-shaped locking pin guide tube 26 is fixed to the upper half of the slide anchor 19, and a cylindrical locking pin 27 is installed in the guide tube 26 in the direction of movement of the slide anchor 19. The locking pin 27 is inserted so as to be slidable in orthogonal directions, and the locking pin 27 is always connected to the rail by a coil spring 30 compressed between the intermediate step 28 of the locking pin 27 and the spring receiving portion 29 of the guide tube 26. Locking hole 12 of member 11
The spring is biased in the direction of insertion. Reference numeral 31 is a knob for tension operation that is screwed onto the rear end threaded portion 32 of the locking pin 27, and the guide tube 2 is attached to the outer periphery of the knob.
It is integrally provided with a skirt portion 31' that covers the outer circumferential surface of 6.

The locking pin 27 leaves a required length of the locking portion 33 in the portion to be fitted into the locking hole 12 of the rail member 11, and extends inwardly to at least the depth of the locking hole 12 of the rail member 11. A groove 34 having a width H larger than l is provided around the circumference, and an engagement step portion 35 is provided at the end of the groove 34, facing the opening periphery 18 of the locking hole 12 and capable of being locked to the opening periphery 18. is formed.

36 is a cylindrical resin material installed in the groove 34 of the locking pin 27;
is not deformed by stress during normal use of the belt, but only when an impact load of a predetermined value or more is applied to the belt, is pushed by the inner surface of the locking hole 12 and deforms or breaks, causing the locking pin 27 to deform. The engagement step portion 35 is the locking hole 1
Usually, a cylindrical piece with a slit 36' formed in the axial direction as shown in FIG. Either use force to fit into the groove 34 of the locking pin 27 and assemble it, or the locking pin 2
7 is inserted into a resin molding die, and the groove 34 is directly filled with the resin material 36 and molded, or the resin material 36 having a shape that matches the groove 34 is glued to the locking pin 27, etc., and assembled. It will be done.

As the resin material, any resin can be used as long as it satisfies the above-mentioned mechanical performance, but polyal resins, polyester resins, etc. are usually preferred.

Further, the outer peripheral surface of the resin material 36 has a shape that is substantially flush with the outer peripheral surface of the locking pin 27, so that it does not get in the way when the locking pin 27 is inserted into and removed from the locking hole 12. ing.

In the figure, reference numeral 37 denotes a cover fixed to the front surface of the slide anchor 19 for covering the rail member 11 and the slide anchor 19.

The seat belt anchor device of the present invention has the above-mentioned configuration. Next, its operation will be explained. First, when the seat belt is worn normally, the height of the slip anchor 23 is adjusted to the physique of the occupant. When moving the slide anchor 19 up and down, pull the knob 31 and insert the locking pin 27 into the locking hole 12 of the rail member 11.
When the slide anchor 19 is removed from the rail member 11, the slide anchor 19 becomes movable along the rail member 11. Therefore, when the slide anchor 19 is moved to the desired position and the knob 31 is released, the locking pin 27 is attached to the coil spring 30. The slide anchor 19 is automatically fitted into the locking hole 12 by the biasing force, and the slide anchor 19 is positioned to hold the slip anchor 23 at a predetermined height.

At this time, the resin material 36 provided on the locking pin 27 is not deformed at all by the stress during normal use of the seat belt B, and the locking step portion 35 of the locking pin 27 is aligned with the opening periphery 18 of the locking hole 12. This prevents the locking pin 27 from engaging with the locking hole 12, making it easy to engage and remove the locking pin 27, and also to prevent the locking pin 27 from engaging with the locking hole 12.
Alleviates collisions with the inner surface and prevents abnormal noises caused by vibrations when the vehicle is running.

In addition, when the slide anchor 19 is fixed as described above, when a shock load of more than a predetermined value is applied to the seat belt B due to a vehicle collision, etc., in general, a load of 200 kg to 3 tons is applied via the slip anchor 23 and the slide anchor 19. Locking pin 27
When a load is applied in the direction perpendicular to the axis, the resin material 36 is pushed against the inner surface of the locking hole 12 and deforms, and the locking pin 27
Since the engagement stepped portion 35 engages with the opening periphery 18 of the engagement hole 12, this prevents the engagement pin 27 from coming off from the engagement hole 12, greatly increasing the connection strength between the two. As a result, the slide anchor 19 is prevented from slipping down, and the state in which the seat belt B restrains the occupant is properly maintained.

FIG. 5 is a cross-sectional view showing another embodiment of the seat belt anchor device of the present invention, in which the locking pin 27 inserted into the guide tube 26 fixed to the slide anchor 19 is at the tip of the locking hole fitting part. Flange-shaped engagement part 3
3, and an engaging stepped portion 3 located inwardly of the engaging portion 33.
A cylindrical resin material 36 is inserted into the outer periphery of a small diameter portion 38 having a cross section smaller than that of the engaging portion 33 formed through the engaging step portion 3 , and both ends of the resin material 36 are connected to the engaging step portion 3 .
5 and a washer 39 attached to the intermediate step 28.

In the figure, parts with the same reference numerals as those in FIG. 3 indicate the same members and parts, respectively.

In the anchor device configured as described above, the inner surface of the guide tube 26 and the outer periphery of the small diameter portion 38 of the engagement pin 27 do not come into contact with each other, which improves the noise prevention effect during normal belt use, and also improves the noise prevention effect in the event of a vehicle collision, etc.
The resin material 36 can be easily deformed, and the engagement step 35 and the locking hole periphery 18 can be satisfactorily engaged.

FIG. 6 shows still another embodiment of the seat belt anchor device of the present invention, in which the locking hole 1 of the rail member 11 is
2 and the locking pin 27 are rectangular, and the locking pin 27 has a locking step portion 3 above and below the locking hole insertion portion.
5, 35' are formed, and a resin material 36 is mounted within each notch 40.

Therefore, in the structure described above, when a horizontal downward impact load is applied to the locking pin 27, the resin material 36
is pressed against the inner surface of the locking hole 12 and deforms, and the engaging steps 35, 35' of the notch 39 engage with the opening periphery 18 of the locking hole 12 to prevent the locking pin 27 from coming off, Preventing the slide anchor 19 from slipping down is the same as in the previous embodiment.

In the above embodiment, a slip anchor is used as the seatbelt support member 23, and the slip anchor is inserted through the shoulder of the seatbelt B and turned. It can also be applied to connecting a buckle so that its vertical position can be adjusted; in this case, a buckle is attached instead of a slip anchor, and a tongue sewn to the tip of the seat belt is removably connected to the buckle. be done.

(Effects of the Invention) As described above, the seat belt anchor device of the present invention leaves a required length from the tip of the insertion portion in the locking hole insertion portion of the locking pin that connects the rail member and the slide anchor. an engaging stepped portion is formed inwardly, and a portion with a small cross section is provided continuously to the stepped portion, and a portion with a small cross section is provided with a portion of the seatbelt that is attached to the slide anchor. A resin material is attached that deforms only when a load is applied and allows the engagement step to be locked to the periphery of the locking hole opening, so that the engagement step of the locking pin can be removed in an emergency such as a vehicle collision. It is designed to be locked to the periphery of the locking hole opening to increase the connection strength between the rail member and the slide anchor, so when using the belt normally,
The resin material prevents the engagement step from engaging the engagement hole,
The locking pin can be inserted into and removed from the locking hole smoothly, making it easy to adjust the height of the slide anchor.In addition, the locking pin can strengthen the connection between the rail member and the slide anchor in an emergency such as a vehicle collision. This increase prevents the slide anchor from moving unexpectedly, maintains the appropriate state of restraint of the occupant by the seat belt, and has the excellent effect of ensuring the safety of the occupant.

Furthermore, according to the present invention, the resin material provided in the portion where the cross section of the locking pin is small alleviates the collision between the locking pin and the locking hole, making it easy to insert and remove the locking pin and the locking hole. Even when the opening area of the locking hole is increased for the purpose of increasing the opening area, it can also be expected to have the effect of preventing abnormal noises caused by rattling of the locking pin due to vibrations when the vehicle is running.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an example of a seat belt anchor device according to the present invention, FIG. 2 is a front view of the same anchor device, FIG. 3 is an enlarged cross-sectional view taken in the direction of the - arrow in FIG. FIG. 5 is an exploded perspective view showing an example of the locking hole fitting portion of the locking pin; FIG. 5 is a sectional view showing another embodiment of the seat belt anchor device of the present invention; FIG.
The figure is an exploded perspective view showing still another embodiment of the seat belt anchor device of the present invention, and FIG. 7 is a side sectional view of the conventional seat belt anchor device. 11... Rail member, 12... Locking hole, 16...
... Vehicle body, 18 ... Periphery of locking hole opening, 19 ... Slide anchor, 23 ... Seat belt support member,
27... Locking pin, 30... Spring, 34,
38, 39... Portions with small cross sections (grooves, notches),
35, 35'...Engagement step portion, 36...Resin member,
B...Seat belt.

Claims (1)

[Scope of Claims] 1. A slide anchor is attached to a vertically long rail member fixed to the vehicle body and movable along the longitudinal direction in which a plurality of locking holes are bored along the longitudinal direction, and the slide Attaching a seat belt support member to the anchor, and attaching a seat belt support member to the slide anchor,
In the seat belt anchor device, a locking pin is attached to the locking hole of the rail member perpendicularly to the moving direction of the slide anchor, the locking pin being freely insertable and removable and biased by a spring in the direction of insertion of the locking hole. , forming an engaging stepped portion inwardly in the locking hole fitting portion of the locking pin, leaving a required length at the tip of the fitting portion;
A portion with a small cross section is provided continuously on the stepped portion, and the portion with the small cross section is deformed only when a load of a predetermined value or more is applied to the seat belt, thereby locking the engagement step portion. 1. A seat belt anchor device, characterized in that a resin material is attached that allows locking to the periphery of a hole opening. 2. The engagement step portion and the portion with a small cross section are formed by grooves that are recessed facing the inner surface of the locking hole at a portion slightly inward from the tip of the locking hole insertion portion of the locking pin. A seat belt anchor device according to claim 1. 3. The locking hole fitting part of the locking pin has a cylindrical shape, and a groove forming an engagement step is provided around the outer periphery of the fitting part,
3. The seat belt anchor device according to claim 1, wherein the groove is filled with a cylindrical resin material. 4. Claims 1 to 3, wherein the outer surface of the resin material is formed substantially flush with the outer periphery of the locking pin.
The seat belt anchor device according to any one of paragraphs. 5. The seat belt according to any one of claims 1 to 4, wherein the resin material has a cylindrical shape with a slit formed in the axial direction, and is elastically attached to a groove on the outer periphery of the locking pin. Anchor device. 6. The seat belt anchor device according to any one of claims 1 to 4, wherein a resin material is molded in the groove of the locking pin.