JPH057089Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to seat belts, and in particular to an anchor for the shoulder belt in a three-point seat belt that allows the position of the shoulder belt to be adjusted according to the physique of the occupant. The present invention relates to a position adjustment device.

[Prior art and its problems]

Three-point seatbelts are equipped with webbing (shoulder belts) that are wrapped around the occupant's shoulders in a criss-cross pattern, but the position of the shoulders varies depending on the occupant's physique.
It is desirable to change the position of the shoulder belt according to the occupant's physique so that the shoulder belt does not come off the occupant's shoulders or get stuck on the occupant's neck. For this purpose, a rail extending vertically along the center pillar of the vehicle is provided, multiple fitting holes are formed in this rail, and an anchor supporting the shoulder belt is inserted into one of the fitting holes with a lock pin. 2. Description of the Related Art Seat belts are known that include anchor position adjustment devices that can be selectively engaged to change the position of the shoulder belt.

An example of a conventional seat belt shoulder belt anchor position adjustment device is disclosed in Japanese Patent Application Laid-Open No. 1986-
There is one described in Publication No. 18438, which is
A frame-shaped slider is arranged to hold a roughly U-shaped rail, and this slider supports a lock pin that is biased by a spring in the direction of fitting into the fitting hole of the rail. It has a structure in which the knob is fixed.

However, such a seatbelt anchor position adjustment device is inconvenient to use because the locking pin is released from the fitting hole only by pulling the knob.

Further, as another example of the conventional seat belt shoulder belt anchor position adjustment device, there is the device shown in FIGS. A rotation knob is attached, and the lock pin is released from the fitting hole of the rail by rotating the rotation knob 90 degrees.

However, such a seat belt anchor position adjustment device is inconvenient to use because the lock pin is released from the fitting hole only by rotating the rotation knob. The publication does not disclose a specific configuration for releasing from the fitting hole.

[Purpose of invention]

The present invention overcomes these problems with the conventional ones and provides a shoulder belt anchor position adjustment device for a seat belt in which the lock pin is released from the fitting hole of the rail even when the knob is rotated or pulled. The purpose is to

[Summary of the idea]

The present invention provides a slide plate movable along a rail in which a plurality of fitting holes are formed, and this slide plate has an anchor that supports the webbing and is biased by a spring and can be fitted into the fitting holes of the rail. In a shoulder belt anchor position adjustment device for a seat belt equipped with a lock pin, an operating pin protruding from the lock pin in a direction substantially orthogonal to the axis of the lock pin is provided, and a cylindrical knob is rotatably attached to the outer periphery of the lock pin. The cylindrical knob is arranged so as to be movable in the axial direction, and the cylindrical knob has a substantially V-shaped sloped step that engages with the actuation pin, and when the cylindrical knob is pulled, it engages with the sloped step. When the lock pin is pulled together with the operating pin located in the rail, the lock pin is released from the fitting hole of the rail, and when the cylindrical knob is rotated, the position of the inclined step of the cylindrical knob that the operating pin engages is changed to a circular position. The operating pin is shifted in the circumferential direction and moved in the axial direction of the cylindrical knob, and the lock pin is pulled and released from the fitting hole of the rail.

[Example of idea]

The present invention will be explained below with reference to embodiments shown in the drawings.

1A and 1B are a front view and a vertical cross-sectional side view of a seat belt anchor position adjustment device according to the present invention, and FIG. 2 is an exploded perspective view of FIGS. 1A and 1B,
In FIGS. 1A and 1B, illustration of the shoulder anchor is omitted.

In FIGS. 1A and B and FIG. 2, reference numeral 1 denotes a rail whose entire body is slightly curved to match the curvature of the center pillar, and this rail 1 has an elongated rectangular board 2. On both sides of the substrate 2, thin guide side plates 3, 3 are protruded so as to extend over the entire height of the substrate 2. Further, from the front end of each guide side plate 3, 3, narrow guide front plates 4, 4 facing forward on both side edges of the board 2 are protruded, and at the lower ends of both guide front plates 4, 4. teeth,
Stoppers 5, 5 are provided in a protruding manner to close the front side of the substrate 2 by taking positions close to each other.

An L-shaped hook 6 is protruding from the lower end of the base plate 2 for engaging the rail 1 with a center pillar of a vehicle body (not shown), and bolt insertion holes 7, 7 for fixing the rail 1 to the center pillar are drilled at the upper and lower ends of the base plate 2. Furthermore, a plurality of circular fitting holes 8, 8... are drilled at intervals in the vertical direction above the vertical center of the base plate 2, and an inclined groove 10 is formed in the base plate 2 at the upper edge of each fitting hole 8 for smoothly fitting the tip of a lock pin 9 (described later) into the fitting hole 8.

A slide plate 12 that can slide within the interior space 11 is disposed within the interior space 11 of the rail 1 surrounded by the base plate 2, both guide side plates 3, 3, and guide front plates 4, 4. . The slide plate 12 is formed into a rectangular plate shape with a wall thinner than the thickness of the inner space 11 of the rail 1, and is slightly bent at the center to match the curved shape of the rail 1. Furthermore, two circular holes 13 and 14 are bored in this slide plate 12, and a sleeve nut 15 is fitted into the circular hole 13 located at the lower part of the holes, and a sleeve nut 15 is inserted into the circular hole 13 located at the bottom of the holes. installed flange 1
6 is spot welded to the back of the slide plate 12, and the sleeve nut 1 is attached to the slide plate 12.
5 is fixed. On the other hand, a sleeve 17 is fitted into the circular hole 14 located at the top, and a flange 18 provided around the end of the sleeve 17 is spot welded to the back surface of the slide plate 12 so that the sleeve 17 is attached to the slide plate 12. Fixed. The inner diameter of this sleeve 17 is larger than the fitting hole 8 of the rail 1.

In front of the slide plate 12, a plate-shaped slide guide 19 made of resin is arranged.
This slide guide 19 has a first plate part 20 and a second plate part 21 connected by a connecting piece 22, and the first plate part 20 and the second plate part 21 have holes facing the circular holes 13 and 14, respectively. circular hole 2 at the position
3 and 24 are formed, and U-shaped guide grooves 25 and 25 that can fit into the guide front plates 4 and 4 of the rail 1 are formed on both sides of each of the first plate part 20 and the second plate part 21.
is formed. This slide guide 19 is
The slide plate 12 is not directly joined to the rail 1 to allow smooth movement of the slide plate 12 and to prevent metallic sounds from occurring.

Both circular holes 23 and 24 of the slide guide 19
includes the sleeve nut 15 and the sleeve 1.
7 is inserted, and these sleeve nuts 1
5 and the tip of the sleeve 17 protrude forward of the rail 1 through the gap between the guide front plates 4, 4 of the rail 1. And the sleeve nut 1
5 is screwed with a bolt 27 that rotatably supports the shoulder anchor 26, so that the shoulder anchor 26 moves together with the movement of the slide plate 12. Through ring 26 that supports the webbing that does not
a is supported.

On the other hand, an outer cylinder 28 is disposed on the outer periphery of the sleeve 17, and widened portions 29, 29 formed at the base of the outer cylinder 28 are connected to the slide plate 12.
and the flange 18 of the sleeve 17. Further, a tip wall 30 is formed on the outer cylinder 28, and this tip wall 30
A horizontally elongated center hole 31 is bored in the center. The lock pin 9 is slidably fitted into the sleeve 17. A small-diameter fitting part 32 that can be fitted into the fitting hole 8 of the rail 1 is formed at the base end of the lock pin 9, and the center part 33 is relatively tightly closed to the sleeve 17. It has an outer diameter that allows it to slide. Furthermore, a tip portion 35 is formed on the tip side of the center portion 33 through a stepped portion 34 and has a small diameter and protrudes from both sides so that it can be inserted into the center hole 31. Even when the fitting portion 32 is fitted into the fitting hole 8 of the rail 1, the tip portion 35
It is formed in such a size that a part of it protrudes outside from the tip wall 30 of the outer cylinder 28. Furthermore, a coil spring 36 in a compressed state is interposed between the stepped portion 34 of the lock pin 9 and the tip wall 30 of the outer cylinder 28, and the lock pin 9 is inserted into the fitting hole of the rail 1 by its fitting portion 32. 8 is biased in the direction of fitting.

A through hole 37 in a direction transverse to the axial direction of the lock pin 9 is bored at the tip of the distal end portion 35 of the lock pin 9, and an operating pin 38, which will be described later, is inserted into the through hole 37. It's getting old. Further, a cylindrical knob 39 made of resin is disposed on the outer periphery of the outer cylinder 28. This cylindrical knob 39
As shown in detail in FIGS. 3A, B, and C, the cylindrical body 4 has a cylindrical body 40.
An annular support plate 42 is disposed around the through hole 41 of the lock pin 4, and the tip portion 35 of the lock pin 9 is loosely inserted into a center hole 43 inside the support plate 42. Further, the inner diameter of the cylindrical main body 40 is slightly longer than the length of the operating pin 38. Further, a pair of arc-shaped inclined step portions 46, 46 are formed on the distal end surface 45 of the support plate 42, and the end portions are adjacent to both the slits 44, 44. is formed into a substantially V-shape as a whole so that the middle part in the circumferential direction is close to the support plate 42, and the distance from the support plate 42 gradually increases as it moves from this middle part toward both slits 44, 44. ing. Both ends of an operating pin 38 inserted into the through hole 37 of the lock pin 9 are seated and engaged with both inclined step portions 46. 46, the fitting portion 32 of the lock pin 9 fits into the fitting hole 8 of the rail 1, and the actuating pin 38 engages with each inclined step portion 46.
When engaged with the circumferential end of the lock pin 9, the fitting portion 32 of the lock pin 9 is released from the fitting hole 8 of the rail 1. In addition, each of the inclined step portions 4
An operating pin 38 is connected to the slits 44, 4 at both ends of the 6.
Stopper 4 to prevent it from getting inserted into 4
7 and 47 are provided protrudingly, and a disc-shaped cover 48 is fitted to the tip of the through hole 41 of the cylindrical main body 40.

Next, the operation of the embodiment described above will be explained.

In order to adjust the height of the webbing supported by the shoulder anchor 26 by releasing the fitting part 32 of the lock pin 9 fitted into the fitting hole 8 of the rail 1 from this fitting hole 8, The cylindrical knob 39 may be rotated in either direction or pulled. First, when the cylindrical knob 39 is rotated, the operating pin 38 that has been engaged with the circumferential center of each V-shaped inclined step 46 gradually engages with the circumferential end of the inclined step 46. However, since the inclined stepped portion 46 becomes farther away from the support plate 42 toward the end, the lock pin 9 integrated with the operating pin 38 resists the spring force of the coil spring 36. The lock pin 9 is moved forward, and the fitting portion 32 of the lock pin 9 is released from the fitting hole 8 of the rail 1. Therefore, the force of this cylindrical knob 39 is applied to move the slide plate 12 in the vertical direction of the rail 1, and when the height of the webbing moves to an appropriate position relative to the shoulder of the passenger wearing it, the cylindrical knob 3
Let go of 9. Then, due to the action of the coil spring 36, the actuating pin 38 moves down each inclined step 46 of the cylindrical knob 39 so as to move the cylindrical knob 39 relatively.
is rotated to its original state, and the fitting portion 32 of the lock pin 9 fits into a predetermined fitting hole 8. Note that even if the fitting portion 32 does not fit into the predetermined fitting hole 8, as long as it is located in the inclined groove 10 above the fitting hole 8, a downward force from the webbing acts on the shoulder anchor 26. As a result, the fitting portion 32 of the lock pin 9 moves downward along the inclined groove 10 and fits into the fitting hole 8. Note that when the slide plate 12 is moved along the internal space 11 of the rail 1, the slide guide 19 made of resin comes into sliding contact with the guide front plates 4, 4 of the rail 1, so the frictional resistance is small. The slide plate 12 can be moved with light force, and no unpleasant noise is generated.

On the other hand, when the cylindrical knob 39 is pulled, the cylindrical knob 39
Since the fitting portion 32 of the lock pin 9 is released from the fitting hole 8 of the rail 1 together with the actuating pin 38 that is engaged with each inclined step portion 46, when rotating the cylindrical knob 39 as described above, Similarly, shoulder anchor 2
6 to a predetermined position, release the cylindrical knob 39, and fit the fitting portion 32 of the lock pin 9 into the corresponding fitting hole 8 by the action of the coil spring 36.

In this way, according to this embodiment, the fitting portion 32 of the lock pin 9 can be released from the fitting hole 8 of the rail 1 even if the cylindrical knob 39 is rotated in either the left or right direction or even if it is pulled, making it easy to use. Moreover, when the slide plate 12 is moved, the slide guide 19 made of resin moves at the same time, so the movement can be carried out easily and no unpleasant metallic sounds are generated. Furthermore, the rail 1 has an inner space 11
Slide plate 12 and sleeve nut 15 inside
Since it is only necessary to store the flanges 16 and 18 of the sleeve 17 and a part of the slide guide 19 in the thickness direction, it is possible to form it flat, and the rail 1 is prevented from being exposed in the vehicle interior, resulting in a good appearance. .

[Effect of idea]

As explained above, according to the present invention, the lock pin can be released from the fitting hole of the rail even when the cylindrical knob is rotated or pulled, so that it has the practical effect of being easy to use.

[Brief explanation of drawings]

FIG. 1A is a front view showing an embodiment of the seatbelt anchor position adjustment device according to the present invention, and FIG. 1B
is a sectional view taken along the - line in Figure 1A, Figure 2 is an exploded perspective view of Figures 1A and B, Figure 3A is a plan view of the cylindrical knob, and Figures 3B and 3C are respectively Figure 3A
FIG. ... Rail, 8 ... Fitting hole, 9 ... Lock pin, 12 ... Slide plate, 15 ... Sleeve nut, 17 ... Sleeve, 19 ... Slide guide, 26 ... Shoulder anchor, 32 ... Fitting Department,
36... Coil spring, 38... Operating pin, 39...
... Cylindrical knob, 40 ... Cylindrical body, 46 ... Inclined stepped portion.

Claims (1)

[Claims for Utility Model Registration] 1) A slide plate movable along a rail in which a plurality of fitting holes are formed is provided, and the slide plate is fitted with an anchor that supports the webbing and is biased by a spring to fit the rail. In a shoulder belt anchor position adjusting device for a seat belt equipped with a lock pin that can be fitted into a hole, an operating pin protruding in a direction substantially perpendicular to the axis of the lock pin is provided, and a cylindrical knob is provided on the outer periphery of the lock pin. A shoulder belt for a seat belt, characterized in that the cylindrical knob is arranged to be rotatable and movable in the axial direction of the lock pin, and the cylindrical knob is formed with a substantially V-shaped inclined stepped portion in which the actuation pin engages. Anchor position adjustment device. 2) The shoulder belt anchor position adjusting device for a seat belt according to claim 1, wherein a slide guide made of a resin plate is interposed between the slide plate and the rail.