JPH0321316Y2 - - 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, and is particularly applicable to high-height applications such as vehicle collisions. The present invention relates to a seat belt anchor device that prevents the installation position of a belt support member such as a slip anchor from changing when an impact occurs, and also facilitates adjustment of upward movement.

(Prior art) Among the seat belt devices installed in automobiles, etc., those that use continuous belts for both shoulder and waist use are
In order to accurately attach the seat belt to the occupant's shoulders, a seat belt anchor device is used in which the slip anchor, which inserts and supports the middle part of the seat belt, 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. 1, this type of conventional seat belt anchor device has a vertically long rail member 1 fixed to a vehicle body S such as a center pillar.
A slide anchor 3 connected to a slip anchor 2 for guiding the insertion of the seat belt B is movably attached to the upper part of the slide anchor 3, which can be retracted and retracted from the rear side of the slide anchor 3, and is always attached in the projecting direction by a leaf spring 5. A locking pin 4 is provided integrally with the pressed operation knob 4', and the rail member 1 is provided with
A plurality of locking holes 6 are drilled along its longitudinal direction into which the tip of the locking pin 4 can be inserted and removed. By pulling out the integral locking pin 4 from the locking hole 6 of the rail member 1, the slide anchor 3 is free to move up and down, and its height can be adjusted with a simple operation. (For example, see Utility Model Publication No. 59-929).

(Problem 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 quickly supporting 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. Also, because the slide anchor 3 is constantly pulled and biased downward by the action of the winding spring force of the seatbelt winding device (not shown), the operation knob 4' of the locking pin can be moved upward. Sometimes it takes a lot of effort, and abnormal noises may occur in the axial direction of the locking pin 4 while driving.
There remained room for further improvement in these respects.

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, or the length of the locking hole insertion portion of the locking pin 4 may be increased. It is also possible to increase the rigidity of the strength member by increasing
In reality, when the thickness of the rail member 1 is increased in this way, the weight of the product increases and processing becomes difficult, and when the length of the locking pin 4 is increased, It is necessary to provide a large gap t between the back surface of the rail member 1 and the vehicle body mounting surface, and the anchor device largely protrudes toward the passenger compartment, deteriorating the comfort of the vehicle and increasing the risk of the occupants accidentally hitting their heads. cause problems.

The present invention was developed by focusing on the problems that conventional seat belt anchor devices had. , when performing normal height adjustment, a large restraining step is formed to abut against the front side of the rail member and prevent the rail member from protruding from the rear surface and coming into contact with the vehicle body. When the belt is strongly pulled by an impact load and this load acts on the slide anchor, a small engaging step portion is formed at the tip of the pin that can be locked to the opening edge of the locking hole, and both of these steps are formed. the locking hole of the rail member corresponding to the groove between;
By fitting a synthetic resin material that deforms when a high impact such as during a vehicle collision is applied and allows the small stepped portion of the locking pin to lock into the locking hole,
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, and the rail member is always equipped with a slide anchor equipped with a spring that balances the spring force of the retractor that winds the seat belt. The object of the present invention is to bias the operating knob in the lifting direction to facilitate upward movement of the operating knob, thereby solving the above-mentioned problem.

(Means for Solving the Problems) The structure of the present invention for achieving the above object will be explained based on the accompanying drawings FIG. 2 and FIG. 10 corresponding to the 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
A locking pin 27 that can be inserted into and removed from the locking hole 12 of No. 1 and is always biased by a spring 30 in the direction of insertion into the locking hole.
is attached 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 groove portion 34 having a small cross section is formed continuously from the engaging step portion 35.
In the locking hole 12 of the rail member corresponding to the groove portion 34 having a small cross section, the engagement step portion 35 is prevented from locking to the rear opening periphery 18 of the locking hole 12 under the normal belt load; In addition, when an impact load of more than a predetermined value is applied to the belt due to a vehicle collision, etc., the belt is pushed by the groove 34 of the locking pin and deformed, and the engagement stepped portion 35
A resin material 36 is fitted therein to allow the locking hole 12 to be locked to the opening periphery 18 of the locking hole 12. Further, following the groove portion 34, a stop step portion 37 larger than the above-mentioned engagement step portion 35 is formed with a large diameter so that it cannot penetrate from the front side of the lock hole, and the tip of the lock pin protrudes toward the back side. It also serves as a guide surface for moving parallel to the front side of the rail member 11 during the above-mentioned impact load.
Further, a spring 38 is attached between the upper part of the rail member and the lower part of the slide anchor to make the upward movement of the slide anchor easier.

(Function) In the seat belt anchor device of the present invention having the above configuration, when the belt is normally used, the resin material 36 is connected to the engagement stepped portion 35 of the locking pin 27 and the opening periphery 18 of the locking hole 12. The locking pin 27 is prevented from being locked and the locking pin 27 is easily inserted and removed, and the slide anchor 19 is lifted upward and biased 38, so the locking pin 27 is pulled out against the biasing force of the spring 30. The slide anchor 19 can be easily moved to any height by simply inserting the locking pin 27 into the other locking hole 12.
The slide anchor 19 is fitted while being limited by the large-diameter stopper step 37 to position the slide anchor 19, and the height at which the seat belt B is supported 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, and when the slide anchor 19 is positioned, the large stop step 37 of the locking pin 27 softens the biasing force of the spring 30 when the operating knob 31 is released. It contacts the material 36 and also prevents the pin tip from protruding from the back surface of the rail member. Further, when performing the operation 31 to move the slide anchor 19 up and down, the force of the spring 38 that lifts the slide anchor 19 offsets the downward tension that winds up the seat belt, making the operation easy.

(Example) Hereinafter, an example of the present invention will be described in detail based on the accompanying drawings.

Fig. 2 is a side sectional view showing an example of the seat belt anchor device according to the present invention, Fig. 3 is a front view of a rail member in which a resin material is fitted into the locking hole, and Fig. 4 is an X in Fig. 2. - It is an enlarged cross-sectional view of the X-ray cross section seen from the A direction.

In these figures, reference numeral 11 is a vertically long belt-shaped thick metal plate that is press-molded into a U-shaped cross section to provide the required bending rigidity, and a plurality of locking holes 12 are bored along the longitudinal direction. The rail member 11 has mounting bolts 14, which are inserted into mounting holes 13, 13' drilled at the upper and lower ends of the rail member 11.
14' to the vehicle body 16 such as a center pillar, the rail member rear surface 11a is attached to the vehicle body 16.
Fixed.

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 1 of member 11
It is spring-biased in the direction of fitting into 2. 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 is integrally provided with a skirt portion 31' that covers the outer peripheral surface of the guide tube 26 on the outer peripheral portion. .

As shown in FIG. 10, the locking pin 27 has a portion larger than the inner diameter of the locking hole 12 of the rail member in order to regulate the length of the locking pin 27 to be constant at the portion where the locking pin 27 is fitted into the locking hole 12 of the rail member 11. Stopping step part 3
7, but it is also possible to form a stepped portion 37 so as to come into contact with the front side of the slide anchor 19 that is inserted into the rail member, and furthermore, it is also possible to form a stepped portion 37 so as to contact the front side of the slide anchor 19 that is inserted into the rail member. Of course, the contact surface with the locking step portion 37 may be used as the locking step portion 37. The tip of the pin leaves a required length of the engaging portion 33, and at least the rail member 11 is located inwardly.
A groove 34 having a width H larger than the depth L of the locking hole 12 is provided at the end of the groove 34, facing the opening periphery 18 of the locking hole 12, and facing the opening rim 18 of the locking hole 12.
An engaging stepped portion 35 that can be locked is formed.

36 is a cylindrical synthetic resin material fitted into the locking hole 12 of the rail member corresponding to the groove 34 of the locking pin 27, and the resin material 36 does not deform under stress during normal belt use. It is only when a predetermined impact load or more, for example a load of 100 kg or more, is applied to the belt that the belt is pushed by the outer peripheral surface of the groove 34 of the locking pin, deforms or breaks, and the locking pin 27 is engaged. A cylindrical piece having a rigidity that allows the stepped part 35 to be locked to the opening periphery 18 of the locking hole 12 and having a slit 36' formed in the axial direction as shown in FIG. 5 is usually prepared. This can be assembled by inserting it into the locking hole 12 and fitting it using its own elastic force, or
Alternatively, it can be assembled by directly filling and molding the resin material 36 as shown in FIGS. 6 and 7, or by gluing a continuous 36'' of resin material 36 to the rail member as shown in FIG.

As such a resin material, any resin can be used as long as it satisfies the above-mentioned mechanical performance, but polyacetal resin, polyester resin, etc. are usually suitable.

Further, the resin material 36 has an inner circumferential surface that is substantially flush with the engagement step portion 35 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. Care has been taken to ensure that this does not occur. 6th, 7th, 8th
The figure is a sectional view showing another embodiment of the resin material 36 fitted to the rail member 11, and in FIGS. 6 and 7, the resin material 36 is fitted individually into the locking hole 12, In FIG. 8, a continuous 36" resin material 36 is fitted into each of the locking holes 12, which prevents the generation of abnormal noise between the tip of the locking pin 27 and the front surface of the rail member during movement. be.

FIG. 9 shows a tension spring 3 between the upper part of the rail member 11 and the slide anchor 19 to facilitate upward movement of the slide anchor 19 of the present invention.
8 is tensioned, and the slide anchor is constantly tensioned and biased upward. The force of the spring 38 is set to be slightly smaller than the take-up spring force of a retractor (not shown) and the belt's own weight.

In the figure, 40 is a cover fixed to the front 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 is easily moved along the rail member 11 due to the balanced tension between the seat belt tension and the lifting force of the spring 38, so the slide anchor 19 can be easily moved to the desired position. When the knob 31 is moved and the knob 31 is released, the locking pin 27 is automatically fitted into the locking pin 27 due to the biasing force of the coil spring 30, with the stop step 37 coming into contact with the front of the locking hole 12 or the front of the slide anchor. The slip anchor 23 is held at a predetermined height by positioning the slip anchor 23.

At this time, the resin material 36 provided in the locking hole 12 of the rail member is not deformed at all by the stress during normal use of the seat belt B, and the locking step 35 of the locking pin 27 is inserted into the locking hole 12. Since it is prevented from engaging with the opening periphery 18, the locking pin 27 can be easily inserted and removed, and the collision between the outer surface of the locking pin 27 and the inner surface of the locking hole 12 is alleviated, and the vehicle Prevents abnormal noises caused by vibrations while driving.

In addition, when the slide anchor 19 is fixed as described above, if an impact load of more than a predetermined value is applied to the seat belt B due to a vehicle collision or the like, in general, a load of 100 kg to 3 tons is applied to the seat belt B via the slip anchor 23 and the slide anchor 19. Locking pin 27
A radial load is applied to the resin material 36, and as shown in FIG.
2, this prevents the locking pin 27 from coming off from the locking hole 12, greatly increasing the connection strength between the two, and preventing the slide anchor 19 from slipping down. Prevented seat belt B
This means that the occupant restraint condition is properly maintained.

(Effects of the invention) As described above, the seat belt anchor device of the invention has a locking hole fitting portion of the locking pin that connects the rail member and the slide anchor, and a tip end with a regulated length. An engagement step part is formed inwardly leaving a required length from the step part, and a locking hole of the rail member corresponding to the groove part following the step part is inserted into the seat belt attached to the slide anchor with a predetermined amount or more. The engaging step part of the locking pin is fitted with a resin material that deforms only when a load is applied and allows the engaging step part to be locked to the periphery of the locking hole opening in case of an emergency such as a vehicle collision. is locked to the periphery of the locking hole opening to increase the connection strength between the rail member and the slide anchor, so when the belt is used normally, the resin material prevents the locking step from engaging the locking hole. This prevents the locking from locking, the locking pin can be smoothly inserted and removed from the locking hole, and lifting force is applied to the slide anchor, making it easy to adjust the height in both directions, ensuring the safety of the occupants. It has an excellent effect.

Moreover, according to the present invention, the resin material provided in the locking hole of the rail member alleviates the collision between the locking pin and the locking hole, so that the purpose is to facilitate insertion and removal operations between the locking pin and the locking hole. Even when the opening area of the locking hole is increased, it can also be expected to have the effect of preventing the occurrence of abnormal noise due to rattling of the locking pin due to vibrations when the vehicle is running.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of a conventional seat belt anchor device, Fig. 2 is a side sectional view showing an example of the seat belt anchor device according to the present invention, and Fig. 3 is a side sectional view showing an example of the seat belt anchor device according to the present invention. A front view of the rail member,
Fig. 4 is an enlarged sectional view taken from the direction of arrow A in Fig. 2, Fig. 5 is a perspective view of the same resin material, and Fig. 6, 7, and 8
The figure is a sectional view showing each example of the resin material fitted into the locking hole, FIG. 9 is a schematic explanatory view showing upward biasing of the slide anchor, and FIG. 10 is an explanatory view showing the engaged state. It is. 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... Groove,
35...Small engagement step portion, 36...Resin material, 3
7...Large stop step, 38...Spring, B
……Seat belt.

Claims (1)

[Claims for Utility Model Registration] 1. A slide anchor is fitted into a vertically long rail member that is fixed to the vehicle body and has multiple locking holes drilled along its longitudinal direction so as to be movable along its longitudinal direction. a seatbelt supporting member is attached to the slide anchor, and is freely insertable and removable into the locking hole of the rail member in a direction perpendicular to the moving direction of the slide anchor;
In the seat belt anchor device in which a locking pin is spring-biased in the locking hole insertion direction, a required length is left at the tip of the locking pin 27 that is inserted into the locking hole 12. An engaging step portion 35 formed inwardly, a groove portion 34 having a small cross section formed continuously with the step portion, and an end of the groove portion attached to the front side of the locking hole 12 of the rail member 11. A stop step 37 with a large cross section that comes into contact with the force 30 and a stop hole 12 of the rail member 11 corresponding to the groove 34 of the stop pin 27.
and a resin material 3 that deforms only when a load of a predetermined value or more is applied to the seat belt to allow the engagement stepped portion 35 to be engaged with the circumferential edge 18 of the engagement hole opening.
At the same time, the slide anchor 19 is tensioned upwardly by being stretched between the upper part of the rail member 11 and the slide anchor.
A seat belt anchor device characterized by the following features: 2. A utility model in which the above-mentioned restraining step portion 37 with a large cross section that comes into contact with the front side of the rail member 11 by the biasing force 30 restricts the position of the end of the locking pin 27 in the locking hole 12 and the engagement step portion 35. A seat belt anchor device according to claim 1. 3. Biasing 30 of the above-mentioned restraining step portion 37 with a large cross section
The seat belt anchor device according to any one of claims 1 and 2, wherein the abutting surface is the front side of the slide anchor 19. 4. The seat belt anchor device according to claim 1, wherein the inner diameter of the resin material 36 and the outer diameter of the distal end engaging stepped portion 35 of the locking pin 27 are formed to be substantially the same. 5. The seat belt anchor device according to claim 1, wherein the urging force 38 for lifting the slide anchor 19 upward and the winding spring force of the seat belt winding device are substantially the same.