JP2003048487A - Winding type load-collapse preventing device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance workability in an attaching time when a stay is extended to be locked with a locking part, and in a storage time when the stay is contracted to be stored. SOLUTION: A load-collapse preventing device capable of winding a load- collapse preventive sheet is arranged in a seat back of a separate seat, and the extendable stay 8 provided with an outer pipe 11 and an inner pipe 12 is equipped in a pulling-out side tip part of the load-collapse preventive sheet. Joint parts 13,14 provided in the outer pipe 11 and the inner pipe 12 are lockable to the locking parts provided in both side parts of a vehicle respectively. A positioning mechanism comprising a positioning groove 15c and a positioning boss 17 is provided to bring the joint part 14 provided in the inner pipe 12 to a prescribed position around the axial center of the outer pipe 11 with respect to the joint part 13 provided in the outer pipe 11, under the condition where the stay 8 is extended and contracted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retractable load collapse prevention device for a vehicle, and more particularly to a device for attaching to each seat back such as a rear seat having a divided structure.

[0002]

2. Description of the Related Art Conventionally, a roll-up load collapsible vehicle for which a load collapsible prevention sheet can be deployed as needed to separate the cargo compartment and passenger side of a vehicle of a van type or wagon type vehicle There is a preventive device, for example, as shown in U.S. Pat. No. 5,288,122, a pair of rear-seat seatbacks each having a split structure, in which a load-prevention sheet can be wound up to prevent a load-prevention pair. The structure is such that the devices are respectively arranged.

When the load collapse prevention device is used, both ends of the load collapse prevention sheet of one of the load collapse prevention devices are extended and the extendable stays provided at the leading end of the drawer side of the load collapse prevention sheet. The hooks provided on the leading end of the pullout side of the load collapse prevention sheet of the other load collapse prevention device by locking the joint parts provided on each side to the respective locking parts provided on both sides near the ceiling of the vehicle body. By locking the member to the extended portion of the stay, each load collapse prevention sheet is developed.

[0004]

However, according to the conventional expandable stay structure, the expandable structure is formed by the cylindrical outer pipe and inner pipe which are nested with each other. The outer pipe and the inner pipe were rotatable relative to each other around their axes.

Therefore, joint portions are formed in a bent state at the respective ends of the outer pipe and the inner pipe corresponding to both ends of the stay so as to correspond to the inclination of the locking portions attached to the inclined positions on both sides of the vehicle body. In this case, when the stays are extended and the joint parts at both ends are locked to the respective locking parts on the vehicle body side, the joint parts on both sides do not have the same orientation, but once the orientations of both joint parts are aligned. Since it has to be locked to the locking portion, it is troublesome and there is a problem that workability is poor.

Also, when the stay is stored,
With the orientations of both joints aligned, the load collapse prevention sheet was rolled up and stored in the stay receiving part provided at the entrance opening of the casing where the load collapse prevention sheet was wound up and stored. Although the structure is such that it is stored and held in a fitted state, when the stay is contracted from the extended state and stored, the orientation of both joint parts must be aligned.
The joint part is caught on the outside of the casing, the load collapse prevention sheet is not wound up to the end, and the stay cannot be stored properly in the stay receiving part, it looks bad and may cause abnormal noise due to vibration during operation. However, even when the load collapse prevention sheet is stored, it is necessary to once align the directions of both joints, which is troublesome and inferior in workability.

In view of the above-mentioned problems, the present invention has been proposed in view of the above-mentioned problems, in order to improve the workability when the stay is extended and locked to the locking portion, or when the stay is retracted for storage and the workability is improved. The purpose is to provide a protection device.

[0008]

[Means for Solving the Problems] A technical means for achieving the above object is a load collapse capable of winding a load collapse preventing sheet around each seat back of a pair of divided seats adjacent in the vehicle width direction. The prevention device is arranged, and at the leading end of the load collapse prevention sheet of one of the load collapse prevention devices,
An extendable stay equipped with a tubular outer pipe and an inner rod that is supported in the outer pipe so as to be able to move back and forth is accommodated in a compressed state, and the outer pipe and the inner pipe located at both ends of the stay when the stay is extended. The joint portions provided at the respective ends of the rod can be engaged with the engagement portions provided on both sides of the vehicle, and the other load collapses in a state where the stay is engaged with the engagement portions. A roll-up type load collapse prevention device for a vehicle, in which a load collapse prevention sheet of a prevention device is formed so as to be able to be locked to an inner rod, in the stretched state and the contracted state of the stay, the joint provided on the inner rod. The part is that a positioning mechanism is provided with respect to the joint part provided in the outer pipe, the positioning mechanism being at a predetermined position around the axis of the outer pipe.

Further, the positioning mechanism may have a structure for restricting the rotation of the inner rod with respect to the outer pipe about the axis thereof during the entire process of expanding and contracting the stay.

Further, the positioning mechanism is provided on one of the inner peripheral surface of the outer pipe and the outer peripheral surface of the inner rod and extends in the extension and contraction direction of the stay, and the other is provided with the slide groove portion. It may have a structure including a protrusion that is slidably fitted inside.

The positioning mechanism includes a resin pipe mounted inside the outer pipe so as not to rotate relative to the shaft center of the outer pipe and having a split groove portion along the axial direction, and an outer peripheral surface of the inner rod. And a projection portion slidably fitted in the split groove portion of the resin pipe.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will now be described with reference to the drawings. As shown in FIGS. 1 to 5, adjacent to each other in the width direction of a vehicle in a van-type or wagon-type automobile. Pair of load collapse prevention devices 2 mounted on the seat backs 1a of the pair of divided sheets 1
It is composed of a and 2b.

Each of the load collapse prevention devices 2a and 2b includes paired load collapse prevention sheets 4 and 5 as in the conventional case, and a cylindrical casing 6 for winding and storing the load collapse prevention sheets 4 and 5. 7, and a stay 8 that is expandable and contractable is attached to the leading end of the load collapse prevention sheet 4 of one of the load collapse prevention devices 2a.
Load collapse prevention sheet 5 in the other load collapse prevention device 2b
A hook member 9 that is detachably engaged with the stay 8 is attached to the leading end of the pull-out side.

When the load collapse prevention sheets 4 and 5 are wound and housed, a stay receiving portion (not shown) provided in an inlet opening formed along the longitudinal direction of the casings 6 and 7 is provided. The stay 8 and the hook member 9 are configured to fit into the hook receiving portion in a fitted state.

Further, each seat back 1a is configured to be reclining with respect to a seat cushion 1b which serves as a seat portion, and each load collapse prevention device 2a, 2b.
In order to cope with the reclining of each seat back 1a, the load collapse prevention sheets 4 and 5 are normally supported by the casings 6 and 7 while being normally biased in the winding direction. The structure is supported so that it can be pulled out by pulling it out.

When a sudden pullout of the load collapse prevention sheets 4 and 5 is detected, a lock mechanism for stopping the pullout is provided.

For this type of reclining mechanism and lock mechanism, the conventional structure disclosed in Japanese Patent Application Laid-Open No. 11-321463 may be appropriately adopted.

The stay 8 is provided with a cylindrical metal outer pipe 11 and a cylindrical metal inner pipe 12 as an inner rod which is supported in the outer pipe 11 so as to be retractable in the axial direction thereof. Joint portions 13 and 14 arranged in a bent shape with respect to the axial direction of the stay 8 are provided at respective end portions of the outer pipe 11 and the inner pipe 12 corresponding to both end portions of the stay 8.

At both ends of the outer pipe 11, there are provided guide caps 15 each having a guide tube portion 15a for slidingly guiding the inner pipe 12 and a flange portion 15b provided at one end of the guide tube portion 15a so as to project radially outward. Are installed respectively.

That is, one end portion 13a of the joint portion 13 is located in the position of the flange portion 15b of the one guide cap body 15.
Is fitted and fixed to the outer pipe 11 so as not to be relatively rotatable by caulking or the like. In this state, the guide tube portion 15a is fitted to one end of the outer pipe 11 so as to be relatively non-rotatably fixed to the outer pipe 11 by caulking or the like.

In the other guide cap body 15, with the inner pipe 12 slidably fitted therein, a guide cylinder portion 15a is fitted into the other end portion of the outer pipe 11, and the outer pipe 11 is caulked or the like. It is fixed so that it cannot rotate relative to it.

A positioning boss 17 is projectingly provided on the outer peripheral surface near one end of the inner pipe 12 located inside the outer pipe 11, and is joined to the other end of the inner pipe 12 located outside the outer pipe 11. One end portion 14a of the portion 14 is fitted and fixed so as not to rotate relative to it by caulking or the like. At the intermediate position of the joint portion 14, the outer pipe 11 is brought into contact with the flange portion 15b.
A stopper flange 14b for restricting entry into the inside is provided.

The other end of each of the joint portions 13 and 14 is releasably engageable with an engagement groove 19a of an engagement portion 19 provided on both sides near the ceiling of the vehicle. Disc-shaped flange joints 13b and 14c are provided, respectively. At this time, the locking groove 19a of the locking portion 19
As shown in FIG. 3, the rear side of the vehicle is open, and the flange joints 13 of the joint portions 13 and 14 are
b and 14c are inserted into the locking groove 19a from the rear side toward the front side and locked.

Positioning grooves 15c having appropriate lengths are formed in the guide tube portions 15a of both guide caps 15 fixedly attached to the outer pipe 11 so as to face each other in the axial direction of the stay 8 and to have an appropriate length. The stay 8 by the axially moving operation of the inner pipe 12 with respect to 11
In the extended state and the contracted state, the positioning boss portion 17 is slidably fitted in both the positioning grooves 15c.

At this time, when the inner pipe 12 is moved in the axial direction, the positioning boss portion 17 slidably abuts the other edge portions of the two guide tubular portions 15a, which face each other, so that the positioning groove 15c. A guide cam surface 15 that is gradually inclined with respect to the axial direction in order to slide and guide the positioning boss portion 17 to the position.
composing d.

The inner pipe 12 side of the stay 8 serves as the other load collapse prevention device 2b side, and the outer pipe 11
Is attached to the tip of the drawer side of the load collapse prevention sheet 4 as before.
It is installed in the specified mounting state.

Further, the hook member 9 is formed in a hook shape in a side view which is releasably locked to the inner pipe 12, and a pull-out belt 21 for pulling out the load collapse prevention sheet 5 is provided at an intermediate portion in the width direction thereof. It is properly installed.

A pull-out belt for pulling out the load collapse prevention sheet 4 is appropriately attached to the leading end of the load collapse prevention device 2a to which the stay 8 is attached, similarly in the widthwise middle portion thereof. .

The present embodiment is configured as described above. When the load collapse prevention sheets 4 and 5 are deployed, first,
The load collapse prevention sheet 4 of the load collapse prevention device 2a is pulled out from the casing 6, and the inner pipe 12 of the stay 8 is pulled out from the outer pipe 11 to extend the stay 8.

At this time, when the stay 8 is contracted and the load collapse prevention sheet 4 is stored, the positioning boss portion 17 provided on the inner pipe 12 is located in the positioning groove 15c on the joint portion 13 side, The outer pipe 11 and the inner pipe 12 are in a state of being unable to rotate relative to each other about the axis, and the bending directions of the joint portions 13 and 14 are aligned on the same side.

Then, when the inner pipe 12 is successively pulled out from the outer pipe 11, the positioning boss portion 17 is separated from the positioning groove 15c. In this detached state, the outer pipe 11 and the inner pipe 12 are relatively rotatable with respect to each other around the axis.

After that, when the inner pipe 12 is further pulled out and the stay 8 approaches the extended state, if there is a deviation in the bending direction of the joint portions 13 and 14, the positioning boss portion 17 causes the positioning boss portion 17 to move. Under the guide of relative sliding by the surface 15d, it is guided to the position of the positioning groove 15c, then slidably fitted into the positioning groove 15c, and the bending directions of both joint parts 13 and 14 are aligned on the same side with each other. A stretched state of 8 is obtained.

In this extended state, the relative rotation of the outer pipe 11 and the inner pipe 12 about the axis is restricted, and the locking grooves 19a of the respective locking portions 19 provided on both sides of the vehicle. Then, by locking the flange joints 13b and 14c at both ends of the stay 8 from the rear side, the stay 8 is bridged over both locking parts 19. At this time, the load collapse prevention sheet 4 is stretched by the urging force in the winding direction.

Thereafter, the load collapse prevention sheet 5 of the other load collapse prevention device 2b is pulled out from the casing 7, and the hook member 9 at the leading end of the pullout side is locked to the pulled out inner pipe 12 to prevent the load collapse. The seat 5 can be stretched by the urging force in the winding direction, and the usage condition in which the both load collapse preventing sheets 4 and 5 are deployed can be obtained.

When the load collapse prevention devices 2a and 2b are housed in the casings 6 and 7, first, the load collapse prevention sheet 5 on the hook member 9 side is slightly pulled out, and the inner pipe of the hook member 9 is pulled out. When the locked state with respect to 12 is released, thereafter, the load collapse prevention sheet 5 is automatically wound into the casing 7 by the urging force in the winding direction, and finally the hook member 9 is opened at the entrance opening of the casing 7. It is stored in a fitted state in a hook receiving portion provided in the section.

Next, after the joint portions 13 and 14 at both ends of the stay 8 are disengaged from the locking portion 19, the inner pipe 12 is pushed into the outer pipe 11 to stay 8.
Shrink.

When the inner pipe 12 is pushed in, the positioning boss portion 17 located in the positioning groove 15c on the joint portion 14 side is disengaged from the positioning groove 15c. When there is a deviation in the bending direction of the joint portions 13 and 14, the positioning boss portion 17 is guided to the position of the positioning groove 15c under the guidance of relative sliding by the guide cam surface 15d,
Then, the stay 8 is contracted in a state where the joints 13 and 14 are slidably fitted in the positioning groove 15c and the bending directions of the joints 13 and 14 are aligned on the same side.

After that, the load collapse prevention sheet 4 is automatically wound into the casing 6 by the urging force in the winding direction, and finally the stay 8 is provided with the stay receiving portion provided at the entrance opening of the casing 6. It is stored in a fitted state.

The positioning boss portion 17 and the positioning grooves 15c constitute a positioning mechanism for aligning the directions of the joint portions 13 and 14 about the axes thereof when the stay 8 is extended and contracted.

As described above, each positioning groove 1 of the guide cap body 15 provided in both ends of the outer pipe 11
5c and the positioning boss portion 17 provided on the inner pipe 12 cooperate with each other in both the stretched state and the contracted state of the stay 8 when the stay 8 is stretched or pushed. Both joints 1 automatically
It has a structure in which the orientations of 3 and 14 are aligned, and it has excellent workability when mounting the load collapse prevention sheets 4 and 5, and also has excellent workability when stored, and a stable storage state that fits perfectly in the stay receiving part is easy. And the load collapse prevention sheet 4
It can be stored beautifully without being left unwound, and can effectively prevent the generation of abnormal noise due to vibration or the like.

FIG. 6 shows a stay 8 according to the second embodiment. The same components as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

That is, in the stay 8 of this embodiment, the joint portion 13 mounted on the outer pipe 11 is used.
A flange portion 13c corresponding to the flange portion 15b of the guide cap body 15 is integrally formed with the one end portion 13a of the joint portion 13 fitted in the outer pipe 11.
Is fixed to the outer pipe 11 by caulking or the like so as not to rotate relative to each other.

A resin pipe 23 made of polyvinyl chloride or the like is fitted between the outer pipe 11 and the inner pipe 12 so as to fit between the joint portion 13 and the other guide cap body 15. The resin pipe 23 has a split groove portion 2 of a predetermined width along the axial direction.
3a is formed and has a so-called C-shaped cross section.

The split groove portions 23a face the insertion end portion of the one end portion 13a of the joint portion 13 and the insertion end portion of the guide cylinder portion 15a of the guide cap body 15 in the axial direction of the stay 8, respectively. The positioning projections 13d and 15e that are extendedly arranged are fitted to each other, and the resin pipe 23 is mounted in the outer pipe 11 so as to be relatively non-rotatable around its axis. .

Further, the positioning boss portion 17 as a protruding portion provided on the inner pipe 12 is slidably fitted in the split groove portion 23a, and the inner pipe 12 is pulled out from the outer pipe 11 here. In the operation and the pushing operation, the positioning boss portion 17 always slides in the split groove portion 23a, and the rotation of the inner pipe 12 around the axis is restricted. The outer pipe 11 is structured so as to restrict rotation around its axis.

Therefore, the inner pipe 12 and the outer pipe 11 of the stay 8 cannot always rotate relative to each other, and the joint portions 13 and 14 at both ends are always aligned in the same bending direction with respect to the axial center of the stay 8. Since it is in the open state, the expansion and contraction operation of the stay 8 is stable, and the stay 8 can be expanded and contracted smoothly.

Further, the outer pipe 11 and the inner pipe 1
2 has a structure in which a resin pipe 23 is interposed between the two, and the resin pipe 23 can smoothly expand and contract the stay 8 as compared with a metal, and can form a gap between the outer pipe 11 and the inner pipe 12. Since the resin pipe 23 is filled, rattling can be effectively prevented, and even if rattling due to vibration or the like occurs, the silencing effect of the resin can be exerted, and abnormal noise can be effectively prevented.

Furthermore, the gap between the mutual members of the outer pipe 11, the resin pipe 23, and the inner pipe 12 can be set small, and the resin pipe 23 is the inner pipe 12.
Since it can be slightly deformed along the deformation of the resin pipe 23 when a force acts in the direction of bending the stay 8.
The inner pipe 12 can be supported in a wide range by the deforming action of, and there is an advantage that the concentration of force can be effectively dispersed. Therefore, the bending strength of the stay 8 is improved, and a more reliable load collapse prevention effect can be exhibited.

FIG. 7 shows a stay 8 according to the third embodiment. The same components as those in the first and second embodiments are designated by the same reference numerals and the description thereof will be omitted.

That is, in the stay 8 according to this embodiment, the slide groove portion 11a extending in the axial direction is formed on the inner peripheral surface of the outer pipe 11, and the inner pipe 12
The positioning boss portion 17 as a protruding portion projecting from the above is fitted in the slide groove portion 11a.

Therefore, according to this embodiment as well, the stay 8
Since the inner pipe 12 and the outer pipe 11 are not relatively rotatable at all times, the joint portions 13 and 14 at both ends are always aligned in the same bending direction with respect to the axial center of the stay 8. The expansion and contraction operation of the stay 8 is stable and can be expanded and contracted smoothly.

Further, directly on the inner peripheral surface of the outer pipe 11,
It is sufficient to form the slide groove portion 11a, and the structure can be simplified, and there is an advantage that it can be provided at low cost.

The inner pipe 12 is used as a solid inner shaft, a slide groove portion is formed on the outer peripheral surface of the inner shaft along the axial direction, and the inner pipe 12 is slidably fitted in the inner groove of the outer pipe 11. The same effect can be obtained even with a structure in which the projections to be combined are formed.

Also in the first and second embodiments, the inner pipe 12 may have a solid structure. At that time, the joint portion 14 may be integrally provided.

Further, in the above embodiment, a pair of divided sheets 1 adjacent to each other in the width direction of the vehicle has a structure in which the division ratio is 5: 5. However, the division ratio is 6: 4. It may be 1 and is not limited to the division ratio of the embodiment.

[0056]

As described above, according to the rolling-up type load collapse prevention device for a vehicle of the present invention, the joint portion provided on the inner rod is provided on the outer pipe in the extended state and the contracted state of the stay. For the joints
A positioning mechanism is provided around the axial center of the outer pipe so that the joints will automatically align in both the extended and contracted positions with the positioning mechanism. Yes, it is possible to improve workability when installing the stay by extending the stay and locking it to the locking part, or when storing the stay by shrinking the stay, the storage condition is stable, and the roll collapse prevention sheet is left unrolled. However, there is an advantage that it can be stored neatly in appearance and that the generation of abnormal noise due to vibration can be effectively prevented.

Further, in the positioning mechanism, if the inner rod is restricted from rotating about its axis with respect to the outer pipe over the entire extension / contraction operation of the stay, both joint parts will be attached to the axis of the stay. Since the stays are always aligned in the same direction, there is an advantage that the stay expanding and contracting operation is stable and can be smoothly expanded and contracted.

Further, the positioning mechanism is provided with a slide groove portion formed on either the inner peripheral surface of the outer pipe or the outer peripheral surface of the inner rod and extending in the direction of expansion and contraction of the stay, and provided on the other side and slidable in the slide groove portion. The structure including the fitted protrusions has the advantages that the structure can be simplified and the cost can be reduced.

Further, the positioning mechanism is mounted on the outer pipe so as not to rotate relative to the shaft center of the outer pipe, and has a resin pipe in which a split groove portion is formed along the axial direction, and a projection provided on the outer peripheral surface of the inner rod. In addition, if the structure is made up of a protrusion that is slidably fitted in the split groove of the resin pipe, rattling can be reduced, smooth expansion and contraction can be performed, and noise can be effectively suppressed. Further, there is an advantage that the strength of the stay as a whole can be improved and a more reliable load collapse preventing effect can be exhibited.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is an explanatory view showing a mounting state of a stay.

3 is a sectional view taken along the line III-III of FIG.

FIG. 4 is a side view showing a hook member.

FIG. 5 is a partial cross-sectional perspective view of a stay.

FIG. 6 is a partial cross-sectional perspective view of a stay according to a second embodiment.

FIG. 7 is a partial cross-sectional view of a stay according to a third embodiment.

[Explanation of symbols]

1 division sheet 1a seat back 2a, 2b Load collapse prevention device 4, 5 cargo collapse prevention sheet 6,7 casing 8 stay 9 Hook members 11 Outer pipe 11a slide groove 12 Inner pipe 13, 14 Joint part 13b, 14c Flange joint 15 Guide cap body 15c Positioning groove 15d Guide cam surface 17 Positioning boss 19 Locking part 23 Resin Pipe 23a Split groove part

Claims (4)

[Claims] 1. A load collapse prevention device capable of winding a load collapse prevention sheet is arranged on each seat back of a pair of divided seats adjacent to each other in a vehicle width direction, and one of the load collapse prevention devices prevents load collapse. A retractable stay having a tubular outer pipe and an inner rod that is supported so as to be retractable in the outer pipe is accommodated in a retracted state at the leading end of the seat, and the stay is extended when the stay is extended. Joint parts provided at the respective ends of the outer pipe and the inner rod located at both ends can be engaged with the engaging parts provided on both sides of the vehicle, respectively. In a stopped state, in the rolling-up type load collapse prevention device for a vehicle, wherein the load collapse prevention sheet of the other load collapse prevention device is formed so as to be able to be locked to the inner rod, In the closed state, the joint portion provided on the inner rod is provided with a positioning mechanism for setting the joint portion provided on the outer pipe at a predetermined position around the axis of the outer pipe. Retractable load collapse prevention device for vehicles. 2. The vehicle according to claim 1, wherein the positioning mechanism restricts the rotation of the inner rod with respect to the outer pipe about the axis thereof during the entire extension and contraction operation of the stay. Rewind-type load collapse prevention device. 3. The positioning mechanism is provided on one of the inner peripheral surface of the outer pipe or the outer peripheral surface of the inner rod and extends in the expansion and contraction direction of the stay, and the other is provided with the slide groove portion. The winding-type load collapse prevention device for a vehicle according to claim 2, comprising a protrusion that is slidably fitted therein. 4. The resin pipe, wherein the positioning mechanism is mounted in the outer pipe so as not to rotate relative to the shaft center thereof, and has a split groove portion along the axial direction, and an outer peripheral surface of the inner rod. 3. The rolling-up type load collapse prevention device for a vehicle according to claim 2, further comprising: a protrusion that is provided so as to protrude from the resin pipe and that is slidably fitted in the split groove portion of the resin pipe.