JP2002274322A - Three-point belt mount seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a wearing feeling and restraining performance of a belt by simply adjusting the height of a belt shoulder part. SOLUTION: This three-point belt mount seat is provided with a retractor 4, a shoulder anchor 5, a belt anchor 7, a buckle 6, and a tongue 9, and seat belts 8 are diagonally suspended from the thigh part and a shoulder of a seating person to the waist part respectively. A seat back 1 is provided with a side board material 13 constituting a back frame 10 and disposed with a shoulder anchor 5, a support member 41 erected in the side board material 13 and projecting from the upper surface of the seat back, and belt guide members 45 (55 and 65) turnably or swingably connected to the support member 41, and having a belt slit 48 positioned in the approximately right above the shoulder anchor 5 and for inserting the belt part passing through the shoulder anchor 5. The belt guide member can adjust the pull-out height of the seat back of the seat belt in the frontward direction by a position adjusting means 40 accompanied with the vertical movement of the support member 41 or the vertical movement relative to the support member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-point belt mount seat for supporting, at three points, a seat belt sent out of a retractor for winding, of a vehicle seat.

[0002]

2. Description of the Related Art A seat belt mounted on a vehicle seat is often wound around a retractor, pulled out via a tongue, inserted into a buckle provided on a seat cushion side, and fixed by a three-point system. Have been. Also, in recent vehicles, the seat may be made to be of a rotary type or the amount of front / rear position adjustment by a slide mechanism may be considerably lengthened.If the seat belt is pulled out at a center pillar or the like other than the seat, the restraint position with respect to the human body may be reduced. The displacement may become so large that it cannot be restrained normally. Therefore, as a seat structure, a so-called three-point belt mount seat having a built-in belt retractor as illustrated in FIGS. 7 and 8 is also provided. In the figure, reference numeral 10 denotes a back frame of the seat back 1, and reference numeral 2 denotes a back frame.
0 is a cushion frame of the seat cushion 2, and reference numeral 3
Reference numeral 0 denotes a headrest stay 32 (32a, 32b) which also serves as a core material 31 of the headrest 3. Back frame 1
A retractor 4 for winding the belt is provided at a lower portion on one side of the belt 0, and a shoulder anchor 5 is swingably fixed to the upper portion thereof. The buckle 6 and the belt anchor 7 are provided on both sides of the cushion frame 20 so as to be substantially opposed to each other. Then, the seat belt 8 led out from the retractor 4 is pulled out upward, folded back forward and downward through the shoulder anchor 5, and the tongue 9 provided in the middle against the buckle 6 on the opposite side to the shoulder anchor 5. The tongue 9 is detachably engaged with the tongue 9.
The front end of the seat belt folded back from the belt anchor 7
Has been adhered to. In the above structure, the three points of the seat belt 8, that is, all the supporting points of the shoulder anchor 5, the buckle 6, and the belt anchor 7 are around the seat. The occupant can be restrained with a predetermined tension.

[0003]

In the above-described three-point belt mount seat structure, the position of the seat belt 8 diverted from the shoulder anchor 5 is fixed. Strong hits, giving discomfort and discomfort. That is, if the height position of the shoulder anchor 5 is too high or too low, the belt restraint performance is inappropriate, and the feeling of tightening the shoulder by the seat belt 8 is deteriorated.
One side of the seat back 1 is provided with a shoulder anchor 5.
In order to secure the height, it is likely to be one step higher than the other side, giving a sense of incongruity or worsening the visibility before and after. It should be noted that the shoulder anchor 5 is moved by the impact at the time of collision or the like.
In order to protect the occupant by applying a brake to the feeding, a high strength is required, and it has been considered impossible to make the height of this portion easily adjustable.

An object of the present invention is to solve the above problems. Specifically, it is an object of the present invention to make it possible to easily adjust the height of a belt shoulder portion, thereby improving the feeling of belt attachment and restraint when a seat belt is worn. Another object is to alleviate the complexity, uncomfortable feeling, and reduced visibility caused by raising the height of the shoulder anchor to one level as in the conventional art.

[0005]

SUMMARY OF THE INVENTION The present invention for achieving the above object is, for example, for winding a seat belt fixed to a back frame 10 of a seat back 1 as shown in FIGS. A retractor 4; a shoulder anchor 5 provided on one upper side of the back frame 10 for supporting the seat belt 8 sent out from the retractor 4 so as to pass over the shoulder of the occupant; and a shoulder anchor 5 provided on one side of the cushion frame 20. And a buckle 6 provided on the other side of the cushion frame 20, and a seat belt portion between the shoulder anchor 5 and the belt anchor 7. The seat belt 8 includes a buckle 6 and a tongue 9 that engages and disengages, and the seat belt 8 extends obliquely from the crotch part and one shoulder part of the occupant to the waist part. In three-point belt mounting seat that, the seat back 1, the back frame 1
0, the side plate member 13 on which the shoulder anchor 5 is disposed, and a columnar support member 41 (5) standing upright on the side plate member 13 and protruding from the upper surface corresponding to the seat back 1.
1, 61) and a belt slit 48 (58) that is pivotably or swingably connected to the support member and is located substantially directly above the shoulder anchor 5 and penetrates a belt portion passing through the shoulder anchor 5. , 68) having at least a belt guide member 45 (55, 65), and the belt guide member is provided with a position adjusting means 40 that moves up and down the support member 41 (51, 61) or moves up and down with respect to the support member. According to (50, 80), the height of the seat belt 8 withdrawn to the front of the seat back can be changed.

In the above structure, the belt guide member 45
Since the height of (55, 65) is adjusted via the position adjusting means 40 (50, 80), the seat belt 8 is pulled out when the seat height is higher or lower than the standard. The height can be changed to be optimal. For this reason, the present invention relates to a method in which the belt shoulder portion of the seat belt 8 sent out from the retractor 4 and led out from the shoulder anchor 5 (through hole 5a) is connected to the belt guide member 45 (55, 6
By adjusting the height to the optimum height through 5), the contact of the belt shoulder portion with the shoulder can be loosened and the restraint of the belt can be improved regardless of the height of the seat, and discomfort and discomfort can be eliminated. Further, the belt guide member 45 (5
5, 65) are connected to a support member 41 (51, 61) projecting from the side plate 13 constituting the back frame 10 and projecting from the corresponding upper surface of the seat back 1. Therefore, as the seat structure, the support member 41 (5
As can be seen from the comparison between FIG. 2 and FIG. 8, the corresponding side portion of the seat back 1 (the portion that is high and bulky due to the presence of the shoulder anchor 5 in FIG. 8) can be suppressed low by the protrusion height dimension of (1, 61). By doing so, the feeling of discomfort can be eliminated and the decrease in visibility can be somewhat improved.

The above invention is more preferably embodied as in claims 2 to 4. First, the position adjusting means 40 is configured to move the support member 41 up and down by a rotation operation to change the height of the belt guide member 45. This specifies the configuration of FIG.
The position adjusting means 40 can be easily realized by a bolt configuration for the nut 18 as in the embodiment. in this case,
A mode in which the rotation operation of the support member 41 is performed by a member such as a screwdriver or a coin, a mode in which an operation piece is attached to the upper side of the support member 41 so as to be freely retractable, and is performed by the operation piece is adopted. Second, the position adjusting means 50 is configured to rotate the belt guide member 55 to change the height with respect to the support member 51. This specifies the configuration of FIG. 4, and the position adjusting means 50 is the same as that described above.
Can be easily realized by devising the connection configuration of the belt guide member 55 to the support member 51. Third, the position adjusting means 80 includes a clutch mechanism 80A that moves the support member 61 up and down by rotating the belt guide member 65,
This is a configuration in which the height of the belt guide member 65 is changed via an 80B. This specifies the forms of FIGS. 5 and 6 and is excellent in the operability of adjusting the height with respect to the above-described two examples, and can realize a higher quality. Fourth, the support members 41, 51, 61 are configured such that male screws are screwed into nuts 18 fixed to the side plate members 13 and held.
This facilitates simplification by screwing the support members 41, 51, 61 and the nut 18, and easily maintains the fixing strength and appearance characteristics of the support members 41, 51, 61.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a three-point belt mount sheet of the present invention will be described with reference to a first embodiment of FIGS.
This will be described with reference to the third embodiment shown in FIGS. FIG. 1 is an overall configuration diagram showing a shoulder anchor and the like in relation to a back frame, and FIG. 2 is a schematic front view corresponding to FIG. FIG. 3 is a main part configuration diagram showing the details of the position adjusting means taken along the line AA in FIG. FIG. 4 is a main part configuration diagram showing the position adjusting means of the second embodiment corresponding to FIG. FIG. 5 is a main part configuration diagram showing the position adjusting means of the third embodiment corresponding to FIG. FIG. 6A is a sectional view taken along the line BB of FIG. 5, and FIG.
FIG. 6 is a sectional view taken along the line CC in FIG. 5, and FIG. 5C is a plan view of the belt guide member. In the drawings, the same reference numerals are given to members and portions that are operatively the same as those in FIGS. 7 and 8.

(Overall Overview) The three-point belt mount seat of each embodiment includes a seat back 1, a seat cushion 2, and a headrest 3 as a seat structure. The seat back 1 has a configuration in which a buffer pad 15 is held on a back frame 10 and the whole is covered with a bag-like skin material 16. The backrest 10 has a headrest 3 whose height is adjusted and a retractor 4 that can wind up the seat belt 8.
And a shoulder anchor 5 that supports the seat belt 8 sent from the retractor 4 at an upper position. The seat cushion 2 has a configuration in which a pad is held on a cushion frame 20 and an upper surface and a peripheral portion are covered with a skin material. On the cushion frame 20, a belt anchor (attachment fitting) 7 for locking the front end portion of the seat belt 8 and a buckle 6 for locking an intermediate portion of the belt via a tongue 9 are disposed substantially opposite to each other. . The headrest 3 uses a U-shaped headrest frame 30, holds a pad on the upper portion 31, and is covered with a bag-shaped skin material. The headrest frame 30 is configured such that an upper portion 31 above the middle of the U-shape serves as a core material, and lower end portions serve as headrest stays 32a and 32b. The head height adjusting mechanism includes a headrest stay 32a,
32b is vertically moved via a stay holder 34 with respect to a support holder 33 fixed to an upper portion of the back frame 10, and has a lock release knob and the like. Among them, the main part of each embodiment is that the belt guide members 45, 55, 65 and the support members 41, 51, 61 and the belt guide members 45, 55, 65, which are exposed and disposed right above the shoulder anchor 5, are provided. 55, 65 are position adjusting means 40, 50, 6
In FIG. 8 (this is an example of the first embodiment, the same applies to the second embodiment and the third embodiment). As can be seen from the comparison, the belt guide members 45, 55, and 65 are protruded to one side at substantially the same height. Next, this change will be described in detail.

(Main Structure Common to Each Embodiment) As shown in FIG. 1, a back frame 10 has a substantially L-shaped main pipe member 11 forming an upper portion 11a and one side portion 11b, and a corresponding end connected to one side portion 11b. The lower pipe member 12, the upper plate 11a, the side plate member 13 connected to the corresponding ends of the lower pipe member 12 and facing the one side portion 11b, the auxiliary frame 14 bridged between the one side portion 11b and the side plate member 13, and the like. Consists of The support holder 33 described above is fixed to the upper part 11a. The side plate member 13 is a rigid core member formed in a columnar shape with a substantially frame-shaped cross section, and is designed to sufficiently withstand the load applied to the winding retractor 4 fixed to the lower side via a bracket or the like. The height dimension is designed to be slightly lower than that of FIG. Therefore, the upper surface of the seat back 1 is substantially the same on both sides as shown in FIG.

As shown in FIG. 3 and the like, a shoulder anchor 5 is provided on an upper portion of the side plate member 13, and a guide member 19 is provided on the front side and slightly below the shoulder anchor 5. That is, a through hole is provided in the upper end surface 13a, and the nut 18 is welded and fixed to the inner surface side so as to be coaxial with the through hole, and the shoulder anchor 5
Are fixed on the end face 13a by welding. The shoulder anchor 5 is made of a metal plate with a through hole 5a, and inserts and supports the seat belt 8 sent out from the retractor 4 into the through hole 5a. The guide member 19 is a bracket having a substantially U-shape. The guide member 19 holds the seat belt 8 sent out from the retractor 4 with the clearance S between the side plate 13 and the corresponding inner surface of the pad 15.
To guide the sliding so as to be raised or lowered along the axis. The side plate 13 is disposed in the cavity S provided in the pad 15 as shown in FIG.
Are covered with corresponding portions of the shoulder anchor 5, pad 15 and skin material 16. The pad 15 and the skin material 16 include a belt insertion hole which is provided obliquely upward to match the upper front edge portion and is bordered by a decorative cylindrical member 17a, and a decorative cylindrical member 17b provided substantially at the middle between the upper and lower front and rear. An edged bolt insertion hole is provided. Decorative tube member 17
“a” leads out the belt portion that has passed through the through hole 5a of the shoulder anchor 5. The decorative tubular member 17b leads out the support members 41, 51, 61 screwed to the nut 18 from the upper end face 13a and the respective through holes of the shoulder anchor 5.

(Position Adjusting Means of First Embodiment) As shown in FIG.
The belt guide member 45 is rotatably connected to the support member 41 on the premise that the belt guide member 45 is screwed to the nut 18 fixed to the support member 41.
It utilizes the fact that it is screwed and moved up and down.

That is, the support member 41 here is the nut 1
8 has a relatively long shaft portion 42 around which a male screw 42a to be screwed is formed, and a bulging head 43 provided on the upper portion of the shaft portion 42 and serving also as an attachment and operation portion. In this example,
The shaft portion 42 is made of metal, and the bulging head 43 is made of resin in which the upper and lower halves are joined. The length of the shaft portion 42 is determined in consideration of the maximum height position of the belt guide member 45.
The bulging head 43 is formed in a substantially spherical or elliptical shape from the viewpoint of safety, and has a mounting hole 43a provided in the lower central portion.
The upper portion of the shaft portion 42 is inserted and connected to the shaft portion 42 to be integrated with the shaft portion 42. In the peripheral portion, a concave portion 43b is provided substantially above the center, and a circumferential groove 43c is formed in a state where the outer diameter is reduced by one step around a substantially middle portion in the vertical direction. And the support member 4
1 is moved downward from the state of being screwed and held by the nut 18 when rotated forward, and moved upward when rotated reversely. This operation may be performed by pinching the bulging head 43. However, when the belt guide member 45 described later is assembled, it becomes difficult to pinch. Therefore, a turning operation is performed by inserting a driver or a coin into the concave portion 43b. On the other hand, the belt guide member 45 is made of a relatively hard and elastic synthetic resin molded body (P
P injection molded article). The shape is similar to that of FIG. The base end side 46 is provided with a mounting hole 46a, and is elastically engaged with the orbiting groove 43c when the above-mentioned bulging head 43 joins the upper and lower halves, that is, is mounted to be swingable. The free end side 47 is connected obliquely downward from the base end side 46, and is provided with a slit 48 for inserting and guiding the seat belt 8 freely. As shown in FIG. 6 (c), the slit 48 is provided with an opening at the intermediate portion to the outside, and the corresponding belt portion of the seat belt 8 can be inserted into the slit 48 from the opening to prevent the slit 48 from coming off. ing. This is to allow the seat belt 8 to be inserted into the slit 48 of the belt guide member 45 even after the seat back 1 has been assembled.

Accordingly, the belt guide member 45 shown in FIG.
When the load received from the seat belt 8 increases, the seat belt 8 is horizontally rotated about the support member 41, and the corresponding belt portion of the seat belt 8 that has passed through the through hole 5a of the shoulder anchor 5 is guided obliquely downward and forward of the seat back 1. It functions to guide and abut on the seated person's shoulder with an appropriate angle and tension. In this case, for example, if the sitting height is higher than the standard, the seater operates the support member 41 in the manner described above to adjust the position relatively upward. Thus, when the support member 41 is moved upward, the belt guide member 45 is also moved to a higher position in proportion thereto. In the process in which the belt guide member 45 is moved upward, the seat belt 8 is also pulled out in proportion to the upward protrusion amount of the support member 41 by the feeding operation of the retractor 4. At this point, in FIG. 3, when the support member 41 is raised from the solid line position to the dashed line position, the belt guide member 45 is also moved from the solid line position to the dashed line position. In conjunction with this, the corresponding belt portion of the seat belt 8, that is, the belt portion abutting on the shoulder of the occupant, is moved to a high position through the slit 48, and is diverted from the high position to be arranged diagonally below and in front of the seat. In such a structure, since the belt portion of the seat belt 8 that has passed through the shoulder anchor 5 is changed up and down via the belt guide member 45, the seat belt 8 comes in contact with the occupant's shoulder with a loose tension, which makes the seat uncomfortable and uncomfortable with the conventional configuration Pleasure can be prevented. In the event of an impact such as a collision, the seat belt 8
Due to the large tension applied to the belt guide member 4
The function of the shoulder anchor 5 also operates normally while the rocking displacement of the shoulder anchor 5 is performed.

(Position Adjusting Means of Second Embodiment) As shown in FIG.
The belt guide member 55 is directly connected to the support member 51 so as to be rotatable in the vertical direction, and the withdrawal height of the corresponding portion of the belt can be changed. It was made.

That is, the support member 51 has the shorter shaft portion 52 around which a male screw 52a screwed to the nut 18 is formed, and a mounting bulging head 53 provided above the shaft portion 52. are doing. The bulging head 53 is formed in a substantially spherical or elliptical shape in the same manner as described above, and the upper part of the shaft part 52 is inserted and connected to a mounting hole 53a provided in the lower center part, and
2 and integrated. In the peripheral portion, a storage hole 53b is provided on the left side of the drawing, and an arc-shaped guide groove 53d is provided on the right side in the vertical direction. A ball 54 is provided in the storage hole 53b.
The spring 54b which holds a at one end is disposed. The support member 51 can be moved in the same manner as described above by forward and reverse rotation from the state in which the support member 51 is screwed and held by the nut 18, but the vertical movement dimension is smaller than the above. On the other hand, the belt guide member 55 is made of a synthetic resin molded body. The base end side 56 has a large opening 56a on the lower side to escape the shaft portion 52, a plurality of locking holes 56b in the vertical direction passing through the storage hole 53b on the inner right side, and A small projection 56c that fits with the guide groove 53d is provided. The base end 56 is attached to the support member 51 in a state where the bulging head 53 is inserted inside and fitted, that is, a fitting structure similar to a pivot bearing.
In this mounting state, the small projection 56c is fitted into the guide groove 53d, and the ball 54b is engaged with one of the locking holes 56b under the urging pressure of the spring 54b. The space between the end side 56 and the bulging head 53 is held. This holding force is proportional to the urging pressure of the spring 54b. When the base end 56 is turned up and down against the holding force through the operation of the free end 57, the ball 54b is When it escapes to 56b and faces a different locking hole 56b, it engages with the locking hole 56b. The free end side 57 projects from the base end side 56 toward the front of the seat, and has a slit 58 for freely inserting and guiding the seat belt 8 like the above-described one. The slit 58 has an opening in the middle portion that leads to the outside, and the corresponding belt portion of the seat belt 8 can be inserted into the slit 58 and hooked from the opening.

Accordingly, the belt guide member 55 shown in FIG.
The corresponding belt portion of the seat belt 8 that has passed through the through hole 5a of the shoulder anchor 5 guides the seat belt 1 so as to be guided obliquely downward and forward of the seat back 1, and abuts on the shoulder of the occupant with an appropriate angle and tension. Works like that. or,
For example, when the sitting height of the occupant differs greatly from the standard, the position can be adjusted upward or downward by operating the belt guide member 55 in the manner described above. Thus, the belt guide member 55
Is moved relative to the bulging head 53, the height of the belt slit 58 is also changed in proportion thereto. That is,
In FIG. 4, the belt guide member 55 changes from the solid line position to the upward state or the downward state in the alternate long and short dash line position, and is held by the engagement of the ball 54 b and the locking hole 56 b at each of the changed positions. Even in such a structure, since the belt portion of the seat belt 8 passing through the shoulder anchor 5 is changed up and down via the belt guide member 55, the seat belt 8 comes into contact with the shoulder portion of the occupant with a slight tension, which makes the seat uncomfortable or uncomfortable with the conventional configuration. Pleasure can be prevented. In addition, at the time of an impact such as a collision, a large tension applied to the seat belt 8 causes
Since the belt guide member 55 is tilted most downward while being rocked and the restraining function of the shoulder anchor 5 works,
The function of the shoulder anchor 5 also operates normally.

(Position Adjusting Means of Third Embodiment) In this position adjusting means 80, a rod-shaped support member 61 is screwed to a nut 18 fixed to the side plate member 13. However, unlike the above two examples, FIG. As shown in FIG. 6, by rotating the belt guide member 65 left and right, the support member 61 is screwed up or down via the clutch mechanisms 80A and 80B so that the withdrawal height of the belt corresponding portion can be changed. It is.

That is, the support member 61 has a long shaft portion 62 around which a male screw 62a screwed to the nut 18 is formed.
And a columnar shaft portion 63a, a columnar shaft portion 63b, and a hexagonal columnar shaft portion 63 which are on the upper portion of the shaft portion 62 and are arranged from bottom to top.
c, a cylindrical shaft portion 63d, a hexagonal columnar shaft portion 63e, a cylindrical shaft portion 63f, and a shaft portion 63g with a male thread. The case 70 is attached to the shaft portion 63a. The case 70 is composed of upper and lower halves 71 and 72 integrated by engagement of a locking hole 71a and a locking claw 72a.
The opening 73 is formed to allow the belt guide member 65 to rotate left and right about the shaft 63 by about 90 degrees. A second one-way clutch mechanism 80B described later is attached to the shaft portions 63b and 63c. A belt guide member 65 is attached to the shaft portion 63d. The first one-way clutch mechanism 80A is attached to the shaft portions 63b and 63c. A nut 71 is attached to the shaft portion 63g. On the other hand, the belt guide member 65 is made of a synthetic resin molded body as shown in FIG. A shaft portion 63 is provided at the proximal end 66.
A mounting hole 66a penetrating through d with a margin is provided, and a slit 68 for freely inserting and guiding the seat belt 8 is provided on the free end side 67 in the same manner as described above. This slit 68 also has an opening in the middle portion that leads to the outside, and the corresponding belt portion of the seat belt 8 can be hooked on the slit 68 from the opening. The attachment hole 66a is formed as a long hole, and the belt guide member 65 is
Swinging in the direction of the arrow, that is, in the vertical direction. A clutch switching pin 69 is attached to an intermediate portion between the attachment hole 66a and the slit 68 with both ends protruding from upper and lower surfaces. And the above belt guide member 65
The upper and lower coil springs 7, which are interposed in a compressed state between the upper first one-way clutch mechanism 80A and the lower second one-way clutch mechanism 80B, respectively.
By 2a and 72b, it is normally held at a neutral position shown by a solid line in FIG.

The two-way clutch mechanism 80 described above
A and 80B transmit the rotation of the belt guide member 65 to the support member 61. When the belt guide member 65 is rotated in one direction, the first one-way clutch mechanism 80A transmits the turning power to the support member 61, and rotates the support member 65 in one direction. When the sheet is fed and rotated in the opposite direction, the belt guide member 65 is idled and power is not transmitted to the support member 65.
On the other hand, when the belt guide member 65 is rotated in the other direction, the second one-way clutch mechanism 80B transmits the rotating power to the support member 65 and feeds the screw while rotating the support member 65 in the other direction. On the other hand, when the belt guide member 65 is rotated in the opposite direction, the belt guide member 65 is idled and power is not transmitted to the support member 65. That is, the first one-way clutch mechanism 8
The 0A and the second one-way clutch mechanism 80B have the same configuration as the clutch mechanism as shown in FIG. 6, and have a structure in which the operations transmit power in opposite directions.

FIG. 6A shows a first one-way clutch mechanism 80A. The clutch mechanism 80A includes a disc-shaped main clutch plate 81 rotatably held by a columnar shaft 63f and a hexagonal columnar shaft 63e in a recess 82 of the main clutch plate 81. A secondary clutch plate 85 engaged with the mounting hole 85a and rotated integrally with the support member 61;
, And a leaf spring 84 attached to it. On the outer periphery of the secondary clutch plate 85, teeth 85b are provided all around.
The tip of the leaf spring 84 abuts obliquely on 5b.
The first one-way clutch mechanism 80A allows the secondary clutch plate 85 to idle when the secondary clutch plate 85 rotates in the direction in which the leaf spring 84 protrudes (counterclockwise in the drawing), and the secondary clutch plate 85 When rotating in the direction (clockwise direction in the figure) facing the direction in which the leaf spring 84 protrudes, the tip of the leaf spring 84 bites into the teeth 85b of the secondary clutch plate 85, and the secondary clutch plate 85 and the main clutch plate 81 are connected. It rotates together. That is, the secondary clutch plate 85 and the support member 61 are integrally rotated only when the main clutch plate 81 is rotated in one direction (reverse rotation direction). The surface of the main clutch plate 81 facing the belt guide member 65 has an arc groove 83 corresponding to the corresponding end of the clutch switching pin 69.
Are formed. At both ends of the arc-shaped groove 83, the corresponding ends of the clutch switching pins 69 are removably engaged.
3a is provided. In this structure, the free end side 67 of the belt guide member 65 protruding from the case 70 is grasped by hand, and the belt guide member 65 is lifted up to the first one-way clutch mechanism 80A, that is, left and right with the support member 61 as a fulcrum. When the rotary operation is performed,
3, the corresponding end of the clutch switching pin 69 is dropped and engaged. In this engaged state, when the belt guide member 65 is reciprocally rotated within a range of approximately 90 degrees (this range is determined by the opening angle θ of the opening 73), the belt guide member 65 is rotated clockwise in FIG. In the process of moving, the gap between the main clutch plate 81 and the slave clutch plate 85 idles, and in the process of turning in the counterclockwise direction in FIG. Is done. As a result, the support member 61 is rotated counterclockwise via the slave clutch plate 85, and is moved upward with the screw feed by the nut 18. This causes the belt guide member 65 to move upward because the protrusion height of the support member 61 is changed. After this change, the lifting force of the belt guide member 65 toward the first one-way clutch mechanism 80A is released. Then, the belt guide member 65 returns to the neutral position again by the action of the coil springs 72a and 72b, and the engagement between the clutch switching pin 69 and the engagement hole 83a is released. That is, the clutch mechanism 80A is in a power transmission disabled state.

FIG. 6B shows a second one-way clutch mechanism 80B. The clutch mechanism 80B includes a disc-shaped main clutch plate 81 rotatably held by a cylindrical shaft portion 63b, similarly to the clutch mechanism 80A, and a hexagon in a recess 82 of the main clutch plate 81. The secondary clutch plate 85 includes a hexagonal mounting hole 85a engaged with the columnar shaft portion 63c and is rotated integrally with the support member 61, and a leaf spring 84 attached to the recess 81a. And this clutch mechanism 8
0B indicates that when the secondary clutch plate 85 rotates in the direction in which the leaf spring 84 projects (clockwise in the drawing), the secondary clutch plate 8
When the idle clutch 5 is allowed to rotate and the secondary clutch plate 85 rotates in a direction (counterclockwise direction in the drawing) facing the direction in which the plate spring 84 protrudes, the tip of the plate spring 84 bites into the teeth 85 b of the secondary clutch plate 85. Thus, the slave clutch plate 85 and the main clutch plate 81 rotate integrally. That is, the secondary clutch plate 85 and the support member 61 are integrally rotated only when the main clutch plate 81 is rotated in one direction (forward rotation direction). Otherwise, it is the same as the first one-way clutch mechanism 80A. Therefore, in this structure, when the user grasps the free end side 67 of the belt guide member 65 by hand and pushes down the belt guide member 65 to the second clutch mechanism 80B, that is, the lower side, and rotates the support member 61 left and right with the support member 61 as a fulcrum, The corresponding end of the clutch switching pin 69 falls into the engagement hole 83a and is engaged. In this engaged state, when the belt guide member 65 is reciprocally rotated in a range of approximately 90 degrees, the main clutch plate 81 and the sub clutch plate 85 are rotated in the counterclockwise direction in FIG. The power is transmitted between the main clutch plate 81 and the sub clutch plate 85 in the process of the idle rotation and the rotation in the clockwise direction in FIG. The support member 61 is rotated clockwise through the slave clutch plate 85 and is moved downward with screw feed by the nut 18. Accordingly, the belt guide member 65 is also moved downward because the protrusion height of the support member 61 is changed. After this change, the pressing force of the belt guide member 65 is released as described above.

As described above, the present invention only needs to include the technical element specified in claim 1. Position adjusting means 40, 50 for changing the height of the belt guide member 45;
The application form of 80 is selected depending on the shape of the seat back 1 and the headrest 3 and the configuration of the core material. Further, details such as a path through which the seat belt 8 is guided from the retractor 4 to the shoulder anchor 5 and the decorative tubular members 17a and 17b of a portion which extends from the inside to the outside of the seat can be appropriately changed.

[0024]

As described above, in the three-point belt mount seat of the present invention, since the height of the belt guide member is adjusted via the position adjusting means, the seat belt is adjusted by the sitting height of the occupant. Can be changed to optimize the drawer height. For this reason, it can contribute to the improvement of the feeling of wearing the belt and the restraint, and is also excellent as a countermeasure for the complexity and discomfort caused by raising the seat back on one side to secure the height of the shoulder anchor as in the conventional case, and for reducing the visibility. ing.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a seat frame configuration and the like according to an embodiment of the present invention.

FIG. 2 is a schematic front view of a three-point belt mount sheet to which FIG. 1 is applied.

FIG. 3 is a configuration diagram showing details of a position adjusting unit of the first embodiment.

FIG. 4 is a configuration diagram showing details of a position adjusting unit according to a second embodiment.

FIG. 5 is a configuration diagram illustrating details of a position adjusting unit according to a third embodiment.

FIG. 6 is a diagram showing the configuration and operation of the position adjusting means of FIG.

FIG. 7 is a schematic perspective view showing a conventional arrangement example of a three-point belt mount sheet.

FIG. 8 is a schematic front view showing the appearance of the seat of FIG. 7;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Seat back 2 ... Seat cushion 3 ... Headrest 4 ... Retractor 5 ... Shoulder anchor 6 ... Buckle 7 ... Belt anchor 8 ... Seat belt 9 ... Tongue 10 ... Back frame 13 ... Side plate 18 ... Nut 20 ... Cushion frame 45, 55 , 65 ... belt guide members 41, 51, 61 ... support members 48, 58, 68 ... slits 40, 50, 80 ... position adjustment means 80A, 80B ... first and second one-way clutch mechanisms (clutch mechanisms)

Claims (5)

[Claims] 1. A retractor for retracting a seat belt fixed to a back frame of a seat back, and a seat belt provided on an upper portion of one side of the back frame to support a seat belt sent from the retractor so as to pass over a shoulder of a occupant. A shoulder anchor that is provided on one side of the cushion frame and locks the front end of the seat belt; a buckle provided on the other side of the cushion frame; and a portion between the shoulder anchor and the belt anchor. A tongue which is hooked on the seat belt portion of the seat belt and which engages with and disengages from the buckle, wherein the seat belt is obliquely stretched from the crotch part and one shoulder part of the occupant to the waist part. A side plate member constituting the back frame and arranging the shoulder anchor; A column-shaped support member that is erected on the side plate member and protrudes from the upper surface corresponding to the seat back, and is pivotally or slidably connected to the support member, and is located substantially directly above the shoulder anchor; A belt guide member having a belt slit for passing the passed belt portion, wherein the belt guide member is configured to move the support member up and down or a position adjustment unit accompanied by up and down movement with respect to the support member. A three-point belt mount seat characterized in that the height of the drawer forward can be changed. 2. The three-point belt mount seat according to claim 1, wherein the position adjusting means moves the support member up and down by a rotation operation to change the height of the belt guide member. 3. The three-point belt mount seat according to claim 1, wherein the position adjusting means rotates the belt guide member to change the height with respect to the support member. 4. The three-point positioning device according to claim 1, wherein the position adjusting means changes the height of the belt guide member via a clutch mechanism that moves the support member up and down by rotating the belt guide member. Belt mount seat. 5. The three-point belt mount seat according to claim 1, wherein the support member is screwed and held by a nut fixed to the side plate member.