JP2000211471A - Tightening tool for seat belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To firmly fix a child seat, etc., by even a normal seat belt. SOLUTION: This tightening tool 10 is constituted of a cylindrical member 11 having a slit 16 into which a seat belt 3 folded into two can be inserted on a side surface and a winding member 12 winding the seat belt 3 by holding the seat belt 3 by two bars 18, 19 which is freely rotatably inserted into the cylindrical member 11. The tool 10 is constituted by forming an engagement part 21 in the winding member 12 and forming a part to be engaged 15 preventing rotation of the winding member 12 by engagement with the engagement part 21 in the cylindrical member 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastening device for a seat belt used for fixing a child seat or the like with a seat belt.

2. Description of the Related Art A seat belt is mounted on a vehicle seat so that an occupant can be restrained and protected in an emergency (see Japanese Utility Model Laid-Open No. 1-82963 as a similar technique). The seat belt is used not only for directly restraining the occupant but also for securing an object such as a child seat to the seat to protect a small child.
That is, the child seat can be fixed to the seat by passing the seat belt through the fixing hole of the child seat and engaging the tongue of the seat belt with the buckle on the vehicle body side.

[0003]

However, only a dedicated seat belt device provided with a lock mechanism can be used for fixing such a child seat, and it is difficult to fix the child seat with a normal seat belt device. It is. That is, a normal seat belt has a structure that locks only in an emergency (only when pulled vigorously) so as not to squeeze the occupant during wearing (also referred to as an emergency lock take-up device or ELR). Therefore, it is difficult for such a normal seat belt to securely fix the child seat to the seat. Therefore, a dedicated device that can lock the seat belt at any position other than in an emergency is required. Therefore, in order to use a child seat, a person using a normal seat belt must replace the entire seat belt device previously installed in the vehicle with a dedicated device, which is troublesome to prepare. . Also, it is only necessary to install a dedicated seat belt device in advance for all vehicles, but if you do so, people who do not plan to use child seats will have to install expensive devices for unnecessary devices, and improvement is required. I have.

Accordingly, an object of the present invention is to provide a fastening device for a seat belt which can securely fix a child seat or the like even with a normal seat belt.

[0005]

According to a first aspect of the present invention, there is provided a tubular member having a slit into which a seatbelt folded into two sides can be inserted, and a rotatably inserted into the tubular member. A take-up member that takes up the seat belt with the two bars therebetween, forms an engaging portion on the take-up member, and engages with the engaging portion on the tubular member to rotate the take-up member. The engaged portion to be prevented is formed.

According to a second aspect of the present invention, the other end of the one bar is bent to overlap the other end of the other bar, and a bottom is formed at the other end of the tubular member. And a support hole for inserting a superposed portion formed by superposing the other ends of the bar.

According to a third aspect of the present invention, a rotary operation grip is provided at one end of the winding member via a thin portion, and a rib as an engagement portion is formed on the grip, and a cylindrical member is provided. A plurality of keyways are formed at one end as engaged portions with which the ribs of the grip portion bent from the thin portion engage.

According to a fourth aspect of the present invention, a plate-shaped grip portion for rotation operation fixed to the bar is provided at one end of the winding member in the same direction as the bar, and a plurality of key grooves are provided at one end of the cylindrical member. By forming the overlap portion of the bar longer, the length of the bar from the overlap portion to the grip portion is made shorter than the tubular member, and the winding member is pushed toward the tubular member, The grip itself engages with the keyway of the tubular member.

According to a fifth aspect of the present invention, the slit is formed to be open to one end of the cylindrical member, and the disk-shaped grip for rotation operation fixed to the bar at one end of the winding member is formed by the bar. A plurality of ribs are formed radially on the inner surface of the grip portion as engaging portions, so that the overlapping portion of the bar is formed long and the length of the bar from the overlapping portion to the rib is increased. By making the length shorter than the cylindrical member and pushing the winding member toward the cylindrical member, the rib of the grip portion engages with the end of the slit.

[0010]

According to the first aspect of the present invention, the seat belt inserted into the cylindrical member from the slit is sandwiched between the two bars of the winding member, and the winding member is rotated to wind the seat belt. As a result, the seat belt is in a state where tension is applied. By engaging the engaging portion of the winding member with the engaged portion of the tubular member, rotation of the winding member is prevented, so that the tension state of the seat belt is maintained and the seat belt is maintained. Thereby, the child seat can be firmly fixed to the seat. Therefore, by using the fastener of the present invention, a child seat or the like can be securely fixed to a seat even with a normal seat belt.

According to the second aspect of the present invention, in addition to the effects of the first aspect, the other end of one bar is bent and overlapped with the other end of the other bar. The displacement of the seat belt in the width direction is prevented. In addition, since the overlapping portion of both bars is inserted into the support hole formed at the center of the bottom of the tubular member, the winding member can be rotated with reference to the center of the tubular member.

According to the third aspect of the invention, in addition to the effects of the first aspect, the gripping portion is provided on the winding member, so that the rotating operation of the winding member can be easily performed. Further, if the bending is performed after the rotation operation, the rib of the grip portion is engaged with the key groove of the tubular member, and the rotation of the winding member is prevented.

According to the fourth aspect of the invention, in addition to the effect of the first aspect, the seat belt can be wound by rotating the grip portion of the winding member at a position where the grip portion is pulled out from the tubular member. After the winding, the gripper itself becomes an "engaging portion" by pushing the winding member toward the tubular member, and engages with the key groove of the tubular member. Furthermore,
Since the overlapping portion of the bar is long, even if the grip portion is pulled out of the tubular member and rotated, the inserted state of the overlapping portion into the support hole is maintained, and the winding member is securely rotated within the tubular member. Can be.

According to the fifth aspect of the invention, in addition to the effect of the first aspect, the slit is formed in a state opened to one end of the cylindrical member, so that the end of the slit is A rib as an "engaging portion" formed on the inner surface of the disc-shaped grip portion can be engaged with the "engaged portion". Further, since the slit is an open type, the seat belt can be inserted from the side of the slit, and the inserting operation is easy.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 to FIG. 8 show a first embodiment of the present invention. FIG. 1 shows a child seat 2 on a seat 1.
Is shown in a state where is fixed. Reference numeral 3 denotes a seat belt of a normal type. That is, one end of the seat belt 3 is wound and supported by a retractor (ELR) 4 fixed to the vehicle body. After passing through the through ring 5 fixed to the upper part of the vehicle body, the seat belt 3 It is fixed to the provided anchor section 6. A tongue 7 is movably provided in the middle of the seat belt 3. The tongue 7 is pulled out, passed through a fixing hole 8 of the child seat 2, and engaged with a buckle 9 provided on the opposite side of the seat 1. Let's have a child seat 2
Is fixed.

The seat belt 3 is pulled out of the tongue 7 and engaged with the buckle 9 but is not in a tension state. Therefore, tension is applied to the seat belt 3 to fix the child seat 2. Need to be sure. Therefore, in this embodiment, the fastener 10 is attached to an arbitrary position on the seat belt 3. The fastening device 10 may be any one of a position A rising from the retractor 4, a position B from the through ring 5 to the child seat 2, and a position C from the child seat 2 to the anchor portion 6 as long as tension can be applied to the seat belt 3. However, in this embodiment, a position A that rises from the retractor 4 is selected as a position where the mounting operation is easy.

Next, the structure of the fastener 10 will be described with reference to FIGS. The fastener 10 includes a cylindrical member 11 and a winding member 32 made of synthetic resin. The cylindrical member 11 is cylindrical and has a bottom 13 at the other end. A support hole 14 is formed at the center of the bottom 13. Eight key grooves 15 as “engaged portions” are uniformly formed at one end of the cylindrical member 11. In addition, a slit 16 is formed on a side surface of the tubular member 11 so as to allow a loop portion of the seat belt 3 folded in two to be inserted.

A plate-shaped grip portion 17 is formed at one end of the winding member 32, and two center bars 18 and side bars 19 are formed from the grip portion 17 toward the other end. The grip portion 17 has a length greater than the diameter of the tubular member 11, and the center bar 18
Are formed. The grip portion 17 and the bars 18 and 19 are formed in the same direction (that is, the bars 18 and 19 extend along the surface direction of the grip portion 17). Also, a grip portion 17 and two bars 18, 1
9, a thin portion 20 is formed, and the grip portion 17 can be bent from the thin portion 20 with respect to the two bars 18 and 19 (see FIG. 5). A rib 21 is formed on the side surface of the grip portion 17 as an “engagement portion” having a thickness capable of engaging with the key groove 15. The other end of the side bar 19 is overlapped with the other end of the center bar 18 in a bent state, and forms an overlap portion 22 that can be inserted into the support hole 14 by both. This polymerization section 22
Is formed by superimposing the other ends of the center bar 18 and the side bar 19, but can be separated from each other, the superimposed portion 22 can be expanded, and the seat belt 3 can be inserted therein.

Next, a method of using the fastener 10 will be described. First, as shown in FIG. 1, the tongue 7 of the seat belt 3 is pulled out, passed through the fixing hole 8 of the child seat 2, then engaged with the buckle 9, and the seat belt 3 is set in the child seat 2. In this state, since the tension is not yet applied to the seat belt 3, the child seat 2 is not yet firmly fixed. Next, the retractor 4 is locked by pulling the seat belt 3 vigorously by hand, and the seat belt 3 is not pulled out of the retractor 4 even if the retractor 4 is further pulled. Then, the fastener 10 is attached to a position A in the middle of the seat belt 3, and the seat belt 3
The slack portion is wound up and tension is applied to the seat belt 3.

First, the position A of the seat belt 3 is
The loop is formed by folding, and the loop is inserted into the cylindrical member 11 through the slit 16. Then, the two bars 18 and 19 of the winding member 32 are inserted into the tubular member 11, and the overlapping portion 22 is opened to open the two bars 18 and 19.
19, the seat belt 3 is inserted (see FIG. 3) so that the seat belt 3 is sandwiched between the two bars 18, 19. Since the other end of the side bar 19 is bent,
Once the seat belt 3 has been inserted between the two bars 18 and 19, even if pulled in the opposite direction, the seat belt 3 does not come off by being caught in the bent portion.

After the seat belt 3 is sandwiched between the two bars 18 and 19 in this manner, the overlapping portion 22 is inserted into the support hole 14 formed in the bottom 13 of the tubular member 11.
In this embodiment, since the length of the two bars 18 and 19 other than the overlapping portion 22 substantially corresponds to the length of the cylindrical member 11, in a state where the overlapping portion 22 is inserted into the support hole 14,
The grip portion 17 is located outside the tubular member 11 (see FIG. 4). Accordingly, the take-up member 32 is rotated by holding the grip portion 17 by hand, and the slack portion of the seat belt 3 is taken up into the tubular member 11 to apply tension (see FIGS. 7 and 8). The overlapping portion 22 of the winding member 32
Is inserted into the support hole 14 at the center of the tubular member 11, so that the two bars 18, 19 of the winding member 32 rotate in a stable state about the support hole 14, and the seat belt 3
Can be reliably taken up.

When the winding is completed, the grip portion 17 is bent from the thin portion 20 and the rib 21 is attached to the cylindrical member 1.
The first keyway 15 is engaged. Since the position of the rib 21 is offset from the center by bending the grip portion 17, the rib 21 is engaged with the two key grooves 15 arranged side by side with one key groove 15 at a position shifted from the center ( See FIG. 6). Therefore, rotation of the winding member 32 in the return direction is prevented, and the tension state of the seat belt 3 is maintained.

As described above, the fastener 10 of this embodiment is
By using the above, the child seat 2 can be securely fixed to the seat 1 by setting the seat belt 3 in a tension state without using a dedicated device.

FIGS. 9 to 11 show a second embodiment of the present invention. In the fastener 23 of the second embodiment, the plate-shaped grip portion 24 is provided with the bars 25, 26 without the "thin portion".
, So that the grip portion 24 does not bend with respect to the bars 25 and 26. Further, the overlapped portion 27 is formed to be long, and the length L1 of the bars 25 and 26 from the overlapped portion 27 to the grip portion 24 is correspondingly set to the bottom 13 of the tubular member 11.
From one end to one end L0.

Therefore, according to the second embodiment, the folded seat belt 3 is inserted into the tubular member 11 through the slit 16 and the two seat belts 3 are inserted into the tubular member 11. When sandwiching and rotating by the bars 25 and 26, the winding member 28 is not pushed into the tubular member 11 from the beginning, only the tip of the overlapping portion 27 is inserted into the support hole 14, and the grip portion 24 is used for rotating operation. First, it is in a state of being protruded outside the tubular member 11. And the grip part 24
Is turned, the seat belt 3 is wound up by the two bars 25 and 26, and then the grip portion 24 is pushed into the tubular member 11 side. The engagement with the key groove 15 of the member 11 prevents rotation of the winding member 28 in the return direction. In the case of the second embodiment,
Since the grip portion 24 matches the center of the tubular member 11, the grip portion 24 is engaged with a pair of key grooves 15 facing each other at one end of the tubular member 11. Further, if a projection PJ that can be temporarily connected to the support hole 14 is provided in the overlapping portion 27,
The grip portion 24 and the key groove 15 can be prevented from being caught during the winding operation. After the completion of the winding, the grip portion 24 is pushed in so that the projection PJ is inserted into the support hole 1.
4 from the inside to the outside, the keyway 1
5 is supplied.

FIG. 12 shows a third embodiment of the present invention. In the fastening device 29 of the third embodiment, the cylindrical member 30
The key groove at one end of the cylindrical member 30 is omitted, and the slit 31 is extended to one end of the tubular member 30 to be in an open state. Further, in the winding member 32, a disk-shaped grip portion 33 is provided.
Are formed in a direction perpendicular to the bars 25 and 26, and a plurality of ribs 34 as “engaging portions” are radially formed on the inner surface of the grip portion 33. A handle 35 is formed on the outer surface of the grip 33. Further, similarly to the second embodiment, the overlapping portion 27 is formed long, and the length L2 of the bars 25 and 26 from the overlapping portion 27 to the tip of the rib 34 of the grip portion 33 is equal to the length of the cylindrical member 30. It is shorter than the length from the bottom 13 to one end.

In the case of the third embodiment, the slit 3
Since 1 is formed up to one end of the cylindrical member 30, the seat belt 3 folded in two can be inserted from the side of the slit 31, and the work of inserting the seat belt 3 is easier than in the previous embodiment. Further, the seat belt 3 is connected to the cylindrical member 30.
After insertion into the cylindrical member 30, the third embodiment also inserts the bars 25 and 26 of the winding member 32 into the cylindrical member 30 similarly to the second embodiment. When the user grips and rotates, the winding member 32 is not pushed into the tubular member 30 from the beginning, and only the tip of the overlapping portion 27 is supported by the support hole 1.
4 and the grip portion 33 is kept out of the tubular member 30 for the rotation operation. Then, by turning the grip portion 33, the two bars 25 of the seatbelt 3,
When the grip 33 is pushed into the cylindrical member 30 side after winding on the 26, the portion corresponding to the slit 31 among the plurality of ribs 34 formed on the inner surface of the grip 33 is located at the end of the slit 31. The engagement prevents the winding member 32 from rotating in the return direction. In this embodiment, as in the second embodiment, a projection PJ may be provided on the overlapping portion 27.

In each of the above embodiments, an example in which the entire winding member is formed of synthetic resin has been described. For example, the bar may be formed of spring steel having a certain elasticity, and the bar may be formed of synthetic resin. You may insert-mold with respect to a grip part.
Further, between the engaging portion of the winding member and the engaged portion of the tubular member, further engaging means for preventing the engaging portion from coming off from the engaged portion may be provided. This may be, for example, an elastic member having a substantially U-shaped cross section that sandwiches the bottom of the cylindrical member and the grip portion, a member that engages with the overlapping portion protruding from the support hole, or the like. Further, if there is a protrusion as disclosed in the second and third embodiments, a C-shaped clip that engages between the protrusion and the bottom may be used.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a child seat according to a first embodiment of the present invention is fixed to a seat.

FIG. 2 is an exploded perspective view showing the structure of the fastener.

FIG. 3 is a perspective view showing a state where a seat belt is sandwiched between two bars.

FIG. 4 is a cross-sectional view in the longitudinal direction of the fastener.

FIG. 5 is a sectional view taken along the line SA-SA shown in FIG. 2;

FIG. 6 is a side view showing a state in which a rib of a grip portion is engaged with a key groove of a tubular member, as viewed from a direction indicated by an arrow DA in FIG. 2;

FIG. 7 is a radial cross-sectional view of a tubular member showing a state where a seat belt is sandwiched between two bars.

FIG. 8 is a sectional view corresponding to FIG. 7, showing a state in which the seat belt is wound up.

FIG. 9 is an exploded perspective view showing a structure of a fastener according to a second embodiment of the present invention.

FIG. 10 is a cross-sectional view showing a state before the winding member of the fastener according to the second embodiment is pushed in.

FIG. 11 is a sectional view corresponding to FIG. 11, showing a state after the winding member of the fastener is pushed in.

FIG. 12 is an exploded perspective view showing a structure of a fastener according to a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat 2 Child seat 3 Seat belt 10,23,29 Fastener 11,30 Cylindrical member 12,28,32 Winding member 13 Bottom 14 Support hole 15 Key groove (engaged part) 16,31 Slit 17,24 , 33 Grip portion 18, 25 Center bar 19, 26 Side bar 20 Thin portion 21, 34 Rib (engagement portion) 22, 27 Overlap portion

Claims (5)

[Claims] 1. A tubular member having a slit into which a seatbelt folded into two can be inserted on a side surface, and a seatbelt is wound around two bars rotatably inserted into the tubular member. A winding member, wherein the winding member has an engaging portion, and the tubular member has an engaged portion that is engaged with the engaging portion to prevent rotation of the winding member. Characteristic seat belt fasteners. 2. The fastener for a seat belt according to claim 1, wherein the other end of the one bar is bent to overlap the other end of the other bar, and the other end of the cylindrical member is bent. A seat belt fastener comprising: a bottom; and a support hole for inserting a superposed portion formed by superposing the other ends of the bar on the bottom. 3. The fastening device for a seat belt according to claim 1, wherein a grip portion for rotating operation is provided at one end of the winding member via a thin portion. In the portion, a rib as an engaging portion is formed, and at one end of the tubular member, a plurality of key grooves as an engaged portion to which the rib of the grip portion bent from the thin portion is engaged are formed. A fastener for a seat belt, comprising: 4. The fastening device for a seat belt according to claim 2, wherein a plate-shaped grip portion for rotation operation fixed to the bar is provided at one end of the winding member in the same direction as the bar. Forming a plurality of keyways at one end of the cylindrical member, forming a long overlapping portion of the bar, and reducing the length of the bar from the overlapping portion to the grip portion to be shorter than that of the cylindrical member; A fastener for a seat belt, wherein a grip portion itself is engaged with a key groove of a tubular member by pushing a take member toward the tubular member. 5. The fastening device according to claim 2, wherein the slit is formed in a state where the slit is opened to one end of the tubular member, and the slit is fixed to a bar at one end of the winding member. A disc-shaped grip portion for operation is provided in a direction perpendicular to the bar, a plurality of ribs are radially formed on the inner surface of the grip portion as engagement portions, and a long overlap portion of the bar is formed. The length of the bar from the part to the rib is shorter than the cylindrical member, and the rib of the grip part is engaged with the end of the slit by pushing the winding member toward the cylindrical member. Seat belt fastener.