JPS59220437A - Anchor mounting device - Google Patents

Abstract

PURPOSE:To prevent a latch member from being moved when shocked by providing an engaging surface for preventing the movement of a latch piece when any force is applied in the moving direction of the latch piece to the cam groove of a release shaft for allowing the latch piece to move. CONSTITUTION:A cam groove 41 for allowing a latch piece 14 to move relatively to an adjust base 12 is formed in the small diameter part 40 of a release shaft 15 while engaging with the latch piece 14. The cam groove 41 is provided with the first engaging surface 43 for guiding the latch piece 14 located at a position with which the adjust base 12 is engaged to a non-engaging position with which the adjust base 12 is not engaged, and the second engaging surface 44 for preventing the latch piece 14 from moving in the non-engaging position direction. Accordingly, even if the latch piece 14 is subjected to force due to any collision with the side surface of a vehicle in the direction thereof, the latch piece 14 is not moved to the non-engagement position since the latch piece 14 makes close contact with the above described engaging surface 44 to be prevented in the movement thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an anchor attachment device used for a vehicle seat belt.

Occupants who wear seatbelts have a wide variety of physiques, so for safety reasons, it is necessary to be able to adjust the length of the webbing as well as the mounting position of the anchor plate that supports the webbing (especially the anchor plate for shoulder webbing). is more preferable. This is because if the shoulder webbing anchor plate is positioned too high, the webbing will pass over the occupant's face or neck, and if it is too high, it will come off the shoulders and pass through the arms, so in either case, the webbing will not be able to hold the occupant effectively in an emergency. This is because there is a risk that protection may not be possible.

In view of this problem, various adjustable anchor attachment devices have been proposed. Most of them have a method in which a latch member is attached integrally with the anchor plate, and the anchor plate is moved by pushing or pulling to engage the latch member with an optimal mounting hole, or a method is used in which the latch member is attached to the anchor plate. r Move part A'A' l to part A'A'
The position of the anchor plate is adjusted by attaching it to the iJ function and engaging the optimal mounting hole provided in the guide part ladle that guides the slide 7'5154'/j. ] In order to maintain the attachment position of the anchor plate, the upper and lower jaws are pressed into the engaged position by spring means. However, in this type of mounting device, when an impact force is applied in a direction along the moving direction of the latch member, such as in the case of a side collision of a vehicle, the latch member is biased by the spring means due to its own inertia force. There is a risk that it will move against the pressure and come off from the mounting hole. When such a situation occurs, the mounting position of the anchor plate moves, and as a result, the occupant may not be effectively protected as described above.

Taking these circumstances into consideration, the book 11 counterfeiter has previously proposed a method for moving the Te member via a screw, which is suitable for the latter method. Although the intended purpose was achieved to some extent, it was necessary to reduce the lead angle of the screw in order to more reliably prevent the movement of the hinge member, and on the other hand, the operability when the crew operated the screw When this is taken into account, it is necessary to reduce the amount of rotation of the screw, and it has become necessary to satisfy the contradictory demands of increasing the lead angle of the internal screw or requiring a screw with a large diameter.

The present invention was made against this background,
The latch member does not move even if an impact force is applied along the direction of movement of the latch member, so the anchor plate mounting position is reliably maintained, and a more compact anchor mounting device with good operability is provided. The purpose is to

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a seat belt in which the device of the present invention is attached to a center pillar. One end is center pillar 1
The continuous webbing 3, which is stored in a take-up device 2 fixedly installed below, is passed through the anchor plate 11 and folded back to the tongue 4.

The shoulder webbing 5 is stretched out, and the tongue 4 is folded back and the other end is fixed to the outer side of the seat 6.
It is composed of waist webbing 8 sewn to parts 1 and 7.

A buckle device 9 that can be engaged with and detached from the tongue 4 is provided on the inner side of the seat 6 via a flexible support 10.

The anchor attachment device according to the present invention supports an anchor plate 11 used in a fastening seat belt so that the position thereof can be adjusted, and FIG. 2 is a perspective exploded view (however, the anchor plate relationship is not shown). 3 is a sectional side view of the assembled state viewed from the direction of FIG. 1, and FIG. 4 is a sectional view taken along the line BB in FIG. 3 showing the relationship between the adjust base and the latch piece. The anchor attachment device mainly includes an adjustment base 12 that is attached to the center pillar 1, an adjustment anchor 13 that is an anchor member that is guided along the adjustment base and can be slid in the vertical direction, and an adjustment anchor that is slidable on the adjustment anchor. Supported latte piece 1
4, a release shaft 15 as a release part supported on the adjustment anchor 13, and 4-.

The adjustment base 12 has mounting holes 16 and 17 on both upper and lower ends.
is drilled and fixed to one side of the center pillar with bolts 18 and 19. A plurality of notches 20 are formed between the mounting holes 16 and 17 as retaining portions. Adjustment anchors 13 are attached to surround the adjustment base 12. The adjustment anchor 13 is
The cross section is C-shaped. Adjust anchor 13
A support shaft 23 for supporting the release shirt 15 is crimped on the front part 21 of the front part 21, and around the support shaft 23 there are mounting holes 24, 24 for mounting the latch piece 14, and below the support shaft 23 there is an anchor plate. A bulging portion 25 is formed for attaching the latch piece 11, and guide portions 27 and 27 for guiding the latch piece are formed on the back surface portion 26, respectively. The adjustment anchor 13 engages with the adjustment slider 28 from the lower side (the upper and lower parts are based on FIG. 3) and the ends 29 of the slider from the upper side, or is attached with a lip 30 or JI'M. This allows for smooth movement along the adjustment base.

The latch piece 14 has an upper part 31 that is loosely inserted into the attachment hole 24 of the front part 21 of the adjustable anchor, leg parts 32.32 that are accommodated in the guide part 27 of the back part 26, and connecting parts 33 and 33 that connect the two parts. As is clear from FIG. 4, one end 3 of the latch piece 14 engages with the notch 20 of the adjustment base 12. The upper part 31 of the latch piece is formed with a projection 42 (three in the figure) for engaging with a cam groove 41 of a release shaft 15, which will be described later, and a mounting hole 47 for mounting a spring 35. ing.

The release shaft 15 is rotatably supported around a support shaft 23 fixed to the adjustment anchor 13.

The large diameter portion 34 has a mounting hole 36 for attaching a latch spring 35 to be described later, and a plurality of protrusions 3 that engage with a cap 37 fitted into the large diameter portion to prevent idling.
8 is formed. A knob 39 is formed in the gap 37 so that it can be easily operated with a finger or the like. Also, the IJ
Latch piece 1 is attached to the small diameter part 40 of lease shirt) 15.
Cam grooves 41 (three in this embodiment) are formed to engage with the latch piece 4 and move the latch piece relative to the adjust base 12. As is clear from FIG. 6 showing the unfolded shape, the cam groove is located on the adjustment base 1.
A first locking surface 43 (see figure (b)) for guiding the latch piece 14 in the position where it is engaged with the adjustment base to the non-locking position where the latch piece 14 is not engaged with the adjustment base; A second retaining surface 4 for preventing movement toward the mating position.
4 (see figure (a)). In addition, 45 in the figure indicates the lower end of the release shaft 15. The release shaft 15 is fixed to the support shaft 23 and is prevented from moving in the direction along the axis of the support shaft by the retaining ring 46 and the front portion 21 of the adjustment anchor 13.

A spring 35 is provided between the release shaft 15 and the latch piece 7-14, the end of which is locked in the mounting hole 36, 47, respectively. The latch spring exerts a force to return the release shaft 15 to its original position when it is rotated, and also keeps the latch piece 14 in place at the front surface 2 of the adjustment anchor 13.
It also exerts a pressing force in the direction of 1.

Furthermore, a collar 51 is attached to the bulging portion 25 below the adjustment anchor 13 around a bolt 50 that is threaded into the female threaded portion of the mounting member 49 that is fitted into the mounting hole 48 . An anchor plate 11 is rotatably attached via a spacer 52.

Next, a case in which this embodiment is used will be described. If the occupant sits on the seat, inserts the tongue 4 into the buckle 9 and attaches the continuous webbing 3 as shown in Fig. 1, and the moon webbing 5 passes over the occupant's shoulders, the restraint condition is good and there is no anchor. There is no need to adjust the position of the plate 11.

However, it is necessary to adjust the anchor plate 11 downward when the shoulder webbing 5 passes over the face and neck of the occupant, and upward when the shoulder webbing 5 passes over the arm of the occupant. In this case, if the knob 39 of the cap 37 is rotated from the state shown in FIG. 3 (clockwise in FIG. 2), the latch piece 14 engaged with the cam groove 41 of the release shaft 15 integrated with the cap is guided by the first engaging surface 43 of the cam groove (see FIG. 6(b)) and moves in the direction of arrow C.

Therefore, the latch piece 14 is out of alignment with the adjustment base 12. The state at this time is shown in FIG.

The rotation angle of the release shaft 15 is preferably about 90° to 120° in consideration of operability, but in order to guide the latch piece 14 to the non-latched position at the above rotation angle, It is preferable that the inclination θ of the formed first retaining surface is approximately 30° to 45°.

Note that the inclination of the first engagement surface does not necessarily have to be constant. Depending on the case, it is possible to change the shape to an arc shape with a constant curvature, a curved shape with a varying curvature, or a broken line shape with a varying slope midway.

If the adjustment anchor 13 is moved upward or downward while maintaining the state shown in FIG. The release shaft is then rotated to its original position (counterclockwise in FIG. 2), and the latch piece 14 is moved toward the adjustment base 13, returning to the state shown in FIG. 3. In the following operations, the adjustment anchor 13 is moved while the release shaft 15 is rotated, so a one-touch operation is possible and the adjustment operation can be performed quickly.

Subsequently, the latch piece 14 is damaged due to a side collision of the vehicle, etc.
A method of preventing the latch piece from moving when the latch piece receives a force along the direction of movement will be described. For example, when receiving an impact force to the right in the state shown in FIG. 3, the latch piece 14 moves to the left (in the direction of arrow 0) relative to the adjustment base 12 due to its own inertia, that is, in the direction of the non-locking position. trying to move to. However, in the cam groove 41 of this embodiment, the latch piece 14 in the locking position
A second engagement surface 44 is formed on the non-engagement position side when viewed from above (see FIG. 6(a)), and comes into contact with the engagement surface to prevent its movement (the cam groove or release shaft 15
cannot be moved in the C direction by the stopper 46 as described above), so the latch piece 14 cannot be moved in the 0 direction. Therefore, even if the latch piece 14 in the locking position with the adjustment base 12 is subjected to force along the direction of movement, it will not move toward the non-locking position, and the mounting position of the anchor plate 11 will be reliably maintained. .

As shown in FIG. 6, the second retaining surface extends in the direction (Y-Y direction) perpendicular to the moving direction (X-X direction) of the latch piece 14. Although this is most preferred, it is not absolutely necessary to do so. That is, the latch piece 14 and the second engagement surface 4
If the coefficient of friction between 4 and 4 is μ, then it is a straight line (see Figure 7) or a broken line that extends at an angle α that satisfies tan α × μ with respect to the Y-Y direction. A curved shape including a curvature such that the inclination α of the tangent to the Y-Y direction at the engaging portion with the latch piece 14 satisfies the above-mentioned conditions.

It may be an arcuate surface. However, in any case, the operability will be better if the latch piece is moved by reducing the rotation angle (Release Shirt) 15, so the inclination θ of the first locking surface is equal to the slope of the second locking surface. It is preferable that it be larger than α.

Next, FIG. 8 shows a modification of the cam groove formed in the release shaft, in which the first retaining surface 53 extends to the lower end 55 of the release shaft. Cam groove 51
If formed in this way, parts processing becomes easier than in the example described above. Since the functions are the same as those in the example described above, the explanation will be omitted.

The above embodiments are merely illustrative, and the release member may be configured to slide along the front surface of the adjustment anchor instead of rotating.

Further, the latch piece may be configured to be attached to an adjustment anchor. Furthermore, the release member may not be directly engaged with the release member, but may be connected via some intermediate member, or furthermore, the release member may be operated by some kind of operating means.

In addition, in the above explanation, the seat belt of the type in which the middle part of the shoulder webbing is inserted through the anchor plate and supported, but the seat belt of the type in which the end of the shoulder webbing is latched to the anchor plate is also applicable. Of course, anchor attachment devices could be used as well.

As is clear from the explanation in Section I-, since the hitch bead according to the present invention is reliably maintained in the locked position, it is possible to safely protect the occupants even in a side collision of the vehicle, and it is also compact and easy to operate. This has the effect that an anchor attachment device can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of a seat belt to which the device of the present invention is attached, Fig. 2 is a perspective exploded view of the device of the present invention, Fig. 3 is a cross-sectional side view as seen from the direction of Fig. 1, and Fig. 4 is a 13-B in Figure 3
A line sectional view, FIG. 5 is a diagram similar to FIG. 4 showing the operating state,
FIGS. 6(a) and 6(b) are developed views showing the relationship between the cam groove and the latch piece, and FIGS. 7 and 8 are developed views showing modified examples of the cam groove shape, respectively. 20 ・ ... Notch 12 ... ... Adjustment base 13 ・
・・・・・・・・・−Adjust anchor 15- 14 ・・・・・ Latch piece 43 ・・・
...First locking surface 44 ...Second locking surface 15...
・・・・・・Release shaft 41・・・・・・・
... Cam groove patent application Artificial Nusk Warner Co., Ltd. Representative Sakae Sato 3161 μ fee r゛

Claims (1)

[Scope of Claims] (Li) An adjustment base that is attached to the vehicle body and has a plurality of retention parts, an anchor member that is guided along the adjustment base and to which an anchor plate is attached, and a retention position with the retention parts. and a latch piece that is supported by the adjustment anchor so as to be displaceable between the adjustment anchor and the unlatched position, and a latch piece that is provided to guide the latch piece to the unlatched position when operated, a first locking means that engages when the latch piece moves to the locked position; and a second locking means that is provided to prevent the latch piece in the locked position from moving to the non-locked position. (2) The anchor mounting device according to claim 1, wherein the first securing means and the second securing means extend in different directions.