JP2012240643A - Vehicle seat equipped with seat belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably house a seat belt by housing two kinds of the seat belts comprising the normally-shaped part and the deformed part, in separate respective storage devices.SOLUTION: A shoulder belt part 20A of the seat belt 20 is formed as the deformed part 20b is formed in a thick shape, and a retractable belt part 20C is formed of the normally-shaped part 20a. The normally-shaped part 20a is housed in the first storage device 40, and the deformed part 20b is housed in the second storage device 50. The first storage device 40 is constituted as a retractable retractor device, and the second storage device 50 is constituted as a retractable flat device by a fixed roller 52 and a movable roller 54.

Description

  The present invention relates to a vehicle seat equipped with a seat belt. More specifically, the present invention relates to a vehicle seat in which a seat belt having a deformed portion different from a general-purpose normal shape portion is separately stored by a separate storage device.

A vehicle seat such as an automobile is equipped with a seat belt as is well known from the viewpoint of protecting a seated passenger in the event of a vehicle collision. The seat belt restrains and holds the occupant seated in the vehicle seat on the vehicle seat. In order to effectively perform this restraint and holding, various ideas have been made on the seat belt.
For example, in order to disperse the load acting on the occupant's chest from the seat belt at the time of a vehicle collision, there is a type in which the width of the shoulder belt part that receives the occupant's chest part is wider than the width of other normal parts (the following patents) Reference 2). That is, the width of the normal shape portion of a general seat belt is 48 mm to 50 mm, but the width is set to 75 mm to increase the width. In this case, a seat belt part other than the part that directly contacts the body to restrain the occupant, for example, a part in the vicinity of the end part for supporting both ends in the longitudinal direction of the seat belt at the fixed part, cost reduction, weight reduction, etc. From this point of view, it is usually formed as a normal shape portion. In this way, the load received at the time of a vehicle collision is effectively distributed as a wide deformed portion only at a necessary portion.
Also, in the event of a vehicle collision, the seat belt is securely brought into close contact with the occupant to ensure protection. For this purpose, there is a retractor device that winds up a seat belt, which is provided with a pretensioner mechanism so that the seat belt is instantaneously pulled or pulled in when a vehicle collision is detected. Similarly, recently, a method has been proposed in which the seat belt itself is configured in the form of an air bag and the air bag portion is inflated in the event of a vehicle collision so as to be in close contact with the body of the occupant seated in the seat belt. When this air bag is configured, the seat belt portion of the portion is configured to be thicker than the normal shape portion. Normally, the shoulder belt portion is configured as the air bag, and the other portion is formed as a general normal shape portion.
By the way, when the seat belt is not worn and when the seat belt is worn, an excess portion is accommodated by a seat belt accommodating device such as a retractor device. In many cases, the retractor device is installed in the interior of the vehicle seat, and usually one is installed.

JP 2001-301564 A JP 2007-245786 A

As described above, in addition to the normal shape portion of the seat belt, the lateral width of the seat belt is formed wide, or it is formed as an air bag and the thickness thereof is increased, so that the shape and shape are different from the normal shape portion. When the deformed portion is formed, there is a problem that the storage becomes unstable. That is, the seat belt is retracted and stored in a seat belt storage device such as a retractor device. However, if seat belt portions having different shapes are stored together in one seat belt storage device, the seat belt is not stored. It will be stable. In particular, when the seat belt storage device is a conventional general-purpose retractor device, the seat belt retracting state becomes unstable.
In addition, when the shape form of the deformed portion is wide, there is a problem that the lateral width of the retractor device is increased compared to the conventional case, and when the shape form of the deformed portion is thick, the shape is increased in the radial direction. There was a problem.

  Thus, the present invention has been made in view of the above-described problems, and the problem to be solved by the present invention is that the seat belt is formed in two types of shapes, that is, a normal shape portion and a deformed portion. Even in such a case, the seat belt can be stably stored by being stored by a separate storage device corresponding to each shape and form.

In order to solve the above problems, a vehicle seat equipped with the seat belt of the present invention takes the following means.
That is, in the vehicle seat equipped with the seat belt according to the present invention, first, one end portion of the seat belt disposed so as to restrain a seated person on the vehicle seat is disposed inside the seat back. It is a vehicle seat equipped with a seat belt stored by a belt storage device.
The seat belt is formed such that at least a part of the part that restrains the seated person in the seat belt wearing state at the time of sitting is formed wider or thicker than the normal part of the other part. It is formed as a deformed part with different shape and shape,
The storage device for storing one end portion of the seat belt includes a first storage device and a second storage device, and the second storage device, the second storage device in the direction in which the one end portion of the seat belt is stored. Are arranged in series in the order of one storage device,
The normal shape portion from one end of the seat belt to the deformed portion is stored by the first storage device, and the deformed portion of the seat belt is stored by the second storage device. To do.

According to the present invention described above, when the seat belt is stored, the two storage devices of the first storage device and the second storage device are provided. Since the two storage devices are arranged in series and are stored separately in the longitudinal direction of the seat belt, a device with a small storage volume can be obtained.
In storing, the normal shape portion is stored in the first storage device and the deformed portion is stored in the second storage device, so that each storage device is a device adapted to the form of the seat belt. And can be stored with good stability.

The above-described vehicle seat according to the present invention is preferably configured as follows. That is, the above-described first storage device is configured as a retractable retractor device, and the above-described second storage device is installed so as to be movable in the separating direction with respect to the fixed roller and the fixed roller. It is preferable that the seat belt is provided in a form that is folded back with respect to the moving roller, and the seat belt of the deformed portion is stored by the movement of the moving roller in the separation direction.
By setting it as this structure, the 1st accommodating apparatus can be comprised with the general purpose winding type retractor apparatus generally used conventionally. In addition, since the seat belt portion taken up by the retractor device is a normal shape portion, the amount of winding is reduced, and the size in the radial direction of the device can be reduced.
Since the second storage device is a pull-in system that retracts and stores the seat belt by moving a so-called moving roller in a direction away from the fixed roller, the second storage device can be a flat device. Therefore, when the second storage device is installed inside the seat back, it is possible to easily equip the seat belt with a relatively narrow space.

Furthermore, the vehicle seat according to the present invention is preferably configured as follows. That is, it comprises a judging means for judging that the deformed portion of the seat belt has come to the storage start position of the second storage device, and when the judgment means judges that it has come to the storage start position, the second storage device A storage operation is preferably performed.
With this configuration, it is determined by the determination means that the deformed portion of the seat belt has reached the storage start position of the second storage device. Based on this determination, the seat belt is switched from the storage operation by the first storage device to the storage operation by the second storage device, so that the switching operation can be performed reliably and in a timely manner.

According to the present invention, even when the seat belt is formed in two types of shapes, that is, a normal shape portion and a deformed portion, the above means can be used to store the seat belt with separate storage devices corresponding to the respective shape shapes. The seat belt can be stored stably.
When the first storage device is configured as a retractable retractor and the second storage device is configured as a retractable flat device using a fixed roller and a moving roller, the storage device is installed. Even when a storage device is mounted on a seat back having a relatively small space, it can be easily mounted.
In the case where the seat belt is provided with a judging means for judging that the deformed portion of the seat belt has reached the storage start position of the second storage device, the seat belt is stored by the second storage device from the storage operation by the first storage device. Switching to operation can be performed reliably and in a timely manner.

It is a side view which shows in principle the accommodation state by the storage apparatus in the seating state of the vehicle seat equipped with the seatbelt which concerns on the Example of this invention. It is a side view which shows in principle the accommodation state by the accommodation apparatus in a non-sitting state compared with FIG. It is a rear view which shows the equipment state which has arrange | positioned the seatbelt accommodation apparatus to the seat back. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. The operation | movement state of the storage apparatus in a seatbelt wearing state is shown, (A) A figure is a rear view, (B) A figure is a side view. The operation state of the storage device when the seat belt is not attached is shown, (A) is a rear view, and (B) is a side view. It is a perspective view which shows the mechanical structure as a means to judge the deformed part of a seatbelt.

EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated based on drawing. In this description, direction indications such as upward, forward, and outward indicate directions viewed from the seated person in a state where the seated person is seated on the vehicle seat.
FIG. 1 and FIG. 2 show a principle diagram of a storage operation state by the first storage device 40 and the second storage device 50 that store the seat belt 20. FIG. 1 shows a seat belt storing operation state in a state where an occupant is seated on the vehicle seat 10 and the seat belt 20 is attached, and FIG. 2 is a state in which the occupant leaves the vehicle seat 10 and the seat belt 20 is not used. The seat belt storage operation state is shown.
First, based on FIG.1 and FIG.2, the outline | summary of the whole structure of the vehicle seat which has arrange | positioned the seatbelt 20 is demonstrated. A vehicle seat (which may be simply referred to as a “seat”) 10 includes a seat cushion 12 and a seat back 14, and a headrest 16 is provided on the upper portion of the seat back 14. The vehicle seat 10 is equipped with a seat belt 20 for restraining a seated occupant M. The seat belt 20 has a so-called shoulder belt portion 20A which is a portion for restraining the chest of the seated occupant M and a so-called lap belt portion 20B for restraining the waist, which are integrally formed. A tongue plate (not shown) is slidably mounted in a boundary region between the lap belt portion 20B and the shoulder belt portion 20A. Then, the tongue plate is attached to the frame of the seat cushion 12 and is also attached to a buckle (not shown), whereby the seat 10 is seated on the vehicle seat 10 by the seat belt 20 while the seated person is seated. Restrained by
Both end portions of the seat belt 20 are locked to predetermined portions of the vehicle seat. The lower end of the seat belt 20 on the side of the lap belt portion 20B is fixed and locked to the frame of the seat cushion 12. The upper end portion of the seat belt 20 on the side of the shoulder belt portion 20 </ b> A is stored and locked by the seat belt storage device 30 disposed in the seat back 14. Note that when the seat belt 20 is stored and moved into the seat belt storage device 30, the seat belt 20 is guided by a belt guide 18 disposed on the shoulder portion of the seat back 14. The belt guide 18 guides the seat belt 20 at the front position of the seat back 14 by folding it back at the shoulder position of the seat back 14 and stores it in the seat belt storage device inside the seat back 14.

Note that the shape of the seat belt 20 in this embodiment is such that the shoulder belt portion 20A has the shape of a deformed portion 20b having a so-called air bag structure thickness. The other part is a conventional general-purpose part 20a having a thickness smaller than that of the deformed part 20b. That is, the lap belt portion 20B and the winding belt portion 20C from the point K which is the upper end position of the shoulder belt portion 20A in FIG. 1 to the position where the seat belt storage device 30 is disposed are formed in the shape of the normal shape portion 20a. Yes. In this embodiment, the lap belt portion 20B can also be formed in the shape of the deformed portion 20b having the air bag structure as necessary.
Furthermore, as an aspect of the deformed portion 20b of the seat belt 20, there is a deformed portion 20b in which the lateral width of the shoulder belt portion 20A is wide as shown by a virtual line (two-dot chain line) in FIG. The deformed portion 20b formed to be wide is formed wider than the lateral width of the normal shape portion 20a in the lower position as viewed in FIG. 7, and is formed to have a conventional ordinary lateral width.

Next, the seat belt storage device 30 disposed in the seat back 14 for storing the seat belt 20 will be described. The seat belt storage device 30 is composed of two storage devices, a first storage device 40 and a second storage device 50. The first storage device 40 is a retractable retractor device. The second storage device 50 is a pull-in type that retracts and stores the seat belt 20 (20b) by moving the moving roller 54 in the direction away from the fixed roller 52 (downward as viewed in FIGS. 1 and 2). It is configured as a flat device.
The first storage device 40 and the second storage device 50 are arranged in series along the storage flow of the seat belt 20 (20a, 20b) to be stored. The second storage device 50 and the first storage device 40 are arranged in this order with respect to the flow in the storage direction. When the seat belt 20 is stored, the storage operation is performed in the order of the first storage device 40 and the second storage device 50. When the first storage device 40 is operated, the second storage device 50 is in an inoperative state, and in this inoperative state, the seat belt 20 can pass through the second storage device 50 without resistance. Yes. When the storage operation of the seat belt 20 by the first storage device 40 is finished, the retracting operation of the retractor device as the first storage device 40 is stopped, and the retractable storage operation of the second storage device 50 is started. . That is, as shown in the transition of FIG. 1 to FIG. 2, the downward movement of the moving roller 54 is performed with respect to the fixed roller 52, and the seat belt 20 is pulled in as the moving roller 54 moves away. Thus, the storage operation by the second storage device 50 is performed.
In the state in which the seat belt 20 is attached to the seated person M shown in FIG. 1, the storage operation by the seat belt storage device 30 is not performed by the second storage device 50, and is performed by the retractor device of the first storage device 40. The storage operation is performed only by the winding function. That is, in this state, the seat belt 20 simply passes through the second storage device 50, does not operate, and the storage operation is performed only by the first storage device.
2, the seat belt 20 is stored in the normal state, and the storage operation of the deformed portion 20b of the seat belt 20 by the first storage device 40 is completed and the seat storage by the second storage device 50 is performed. The storage operation of the deformed portion 20b of the shoulder belt portion 20A of the belt 20 is performed.

Switching from the operation of the first storage device 40 to the operation of the second storage device 50 is a determination to determine that the position of the deformed portion 20b of the shoulder belt portion 20A has come to the storage position by the second storage device 50. The switching operation is performed based on the determination by the means. Various means can be considered as the judging means. For example, when the winding rotational speed of the winding retractor device of the first storage device 40 is electrically detected and the winding rotational speed corresponding to the length of the winding belt portion 20C is detected, There is a method of stopping the operation of the retractor device based on the detection signal and starting the separating operation of the moving roller 54 of the second storage device 50.
Next, as a mechanical determination means, there is a method of determining using a change in shape between the normal shape portion 20a and the deformed portion 20b. Specifically, this is performed by a detection tool having an insertion hole through which the seat belt 20 can pass. The size of the insertion hole passes through the seat belt portion of the normal shape portion 20a, but does not allow the deformed portion 20b to pass through, so that the seat belt 20 can move the insertion hole of the detection tool at the time of its storage movement and wind up the belt portion. Although the normal shape portion 20a of 20C can pass, the deformed portion 20b of the shoulder belt portion 20A cannot pass. And there exists a method of setting it as the structure which can act | operate a detection tool based on the shape change of this seatbelt, and starts the separation operation | movement of the moving roller 54 of the 2nd storage apparatus 50 based on this operation | movement.

The storing operation of the seat belt 20 by the seat belt storing device 30 in the above embodiment will be described.
When the occupant M is seated on the seat 10 shown in FIG. 1 and the seat belt 20 is worn, the chest of the occupant M is restrained by the shoulder belt portion 20A, and the occupant's waist is restrained by the lap belt portion 20B. The surplus portion of the winding belt portion 20C at the end portion following the shoulder belt portion 20A is wound by the retractor device of the first storage device 40. In this state, the second storage device 50 does not function at all. That is, the moving roller 54 is in a position close to the fixed roller 52 so that it can pass without any obstacle without hindering movement of the seat belt 20 to the first storage device 40. Note that the retractor device of the first storage device 40 is preferably provided with a seat belt lock mechanism that operates when a vehicle collision is detected as usual. In this embodiment, when the first storage device 40 is operated, the second storage device 50 simply passes the seat belt 20 and does not become an obstacle to the storage operation of the first storage device 40. Even when the seat belt lock mechanism of the first storage device 40 is operated, the second storage device 50 does not become an obstacle during the operation.
Next, an operation of storing the seat belt 20 in the seat belt storage device 30 when the occupant leaves the seat 10 and changes from the seat belt wearing state of FIG. 1 to the seat belt non-wearing state shown in FIG. 2 will be described. First, the winding belt portion 20 </ b> C formed by the normal shape portion 20 a from the first storage device 40 to the point K shown in FIG. 1 is wound and stored by the retractor device of the first storage device 40. When the portion 20C of the normal shape portion 20a is wound by the first storage device 40, it is determined by the determining means that the deformed portion 20b of the shoulder belt portion 20A has reached the storage start position of the second storage device 50. . When this determination is made, the retracting operation of the retractor device of the first storage device 40 is stopped, and the operation of the second storage device 50 is started. That is, the separation operation of the moving roller 54 of the second storage device 50 with respect to the fixed roller 52 is performed as a downward movement as shown in FIG. When the moving roller 54 moves downward, the seat belt is retracted in the separating direction so as to be folded with respect to the moving moving roller 54 and the seat belt 20 is stored. Since the seat belt 20 is stored by the second storage device 50 after the determination means determines that the shoulder belt portion 20A has arrived at the second storage device 50, the shoulder belt portion 20A is stored.

According to the above-described embodiment, the winding belt portion 20C of the normal shape portion 20a is stored in the first storage device 40 of the winding type retractor device, and the shoulder belt portion 20A is retractable second storage. The device 50 is stored separately. That is, since the two storage devices 40 and 50 are stored separately, the storage volume of each storage device can be reduced. This is advantageous when the storage device is installed in the seat back 14 where the installation space is generally limited. In particular, according to this embodiment, since the second storage device 50 is a retractable flat device, it is easier to equip it in the seat back 14.
Further, in the present embodiment, when storing, the winding belt portion 20C formed by the normal shape portion 20a is used as the first storage device 40, and the shoulder belt portion 20A formed by the deformed portion 20b is used as the second storage device 50. It is designed to be stored separately. Therefore, each of the storage devices 40 and 50 can be a device suitable for the form of the seat belts 20C (20a) and 20A (20b), and the storage can be stored with good stability.

FIG. 3 and subsequent figures show specific examples of the seat belt storage device 30. In the seat belt storage device 30 of this embodiment, the first storage device 40 is a conventional retractor that is used for general purposes, and the second storage device 50 includes a fixed roller 52, a moving roller 54, and the like. It is a retractable flat device consisting of As shown in FIG. 3, the seat belt storage device 30 is mounted and disposed on the skeleton frame frame 22 of the seat back 14, and is installed obliquely from the left shoulder portion to the lower right portion as viewed in FIG. ing. Specifically, as well shown in FIG. 4, a belt guide 18 for accommodating and guiding the seat belt 20 to the seat belt accommodating device 30 is attached to the upper frame frame 22 </ b> A via an attachment bracket 28. A retractor device as a first storage device 40 is attached to the intermediate frame frame 22B via a mounting bracket 24. A lower end portion of a guide rail 58 that guides the slider 56 of the second storage device 50 is fixed to the lower frame frame 22 </ b> C via a mounting bracket 26. The seat belt storage device 30 is disposed in a relatively thin internal space covered by the seat skin of the seat back 14.
The state shown in FIGS. 3 to 5 shows a state in which the seat belt storage structure 30 corresponds to a state in which the occupant shown in FIG. 1 is seated on the seat 10 and the seat belt 20 is attached. is there. The detailed arrangement structure of the seat belt storage device 30 will be described with reference to FIG. First, in the first storage device 40 configured as a retractable retractor device, the seat belt 20 (20C) which is folded back and guided by the belt guide 18 and moved downward is shown in FIG. As shown, it is disposed at a position where it is wound around the first storage device 40 in a straight state.

The second storage device 50 is configured by combining a fixed roller 52, a moving roller 54, a slider 56, a guide rail 58, and a spring member 60. The fixed roller 52 is disposed via a mounting bracket 62 at a position above the case of the retractor device of the first storage device 40. The fixed roller 52 is pivotally supported by the mounting bracket 62 so as to be capable of rotating. As shown in FIG. 5B, the seat belt 20 (20 </ b> C) has a positional relationship in which the seat belt 20 (20 </ b> C) passes through the left position of the fixed roller 52 and the mounting bracket 62 and is stored in the first storage device 40.
The slider 56, the guide rail 58, and the spring member 60 are for guiding the moving roller 54 in the vertical direction. As shown in FIG. 5B, the guide rail 58 is disposed in the vertical direction at the right side position of the retractor device of the first storage device 40, and the slider 56 is guided along the guide rail 58 in the vertical direction. Combined to be moved. The spring member 60 is disposed to be locked to the lower end portion of the guide rail 58 and the slider 56. The spring member 60 is a tension spring, and a biasing force is always applied to move the slider 56 downward. In the illustrated state of FIG. 5, a detection plate 64 of a detection tool as a determination means described later is in a locked state with the slider 56, and the slider 56 is held at the upper position. That is, in this state, the spring member 60 is in an extended state. In the position state of the slider 56, the seat belt 20 is not stowed by the second stowage device 50, and the so-called second stowage device 50 is in a non-actuated state.
The moving roller 54 is attached to the position of the upper end portion of the slider 56 via attachment arms 66 disposed on both sides. The moving roller 54 is pivotally supported at one end of the mounting arm 66 and is mounted on the mounting arm 66 so as to be capable of rotating. The other end of the mounting arm 66 is pivotally supported by a slider 56 and is mounted so that the mounting arm 66 can swing with respect to the slider 56. Therefore, the moving roller 54 can also swing about the shaft support 70, and can move downward while swinging when the slider 56 moves downward. In addition, the arrangement | positioning position state of the movement roller 54 is the left side position of the position where the seat belt 20 (20C) passes, seeing in FIG. 5 (B). The positional relationship with the fixed roller 52 described above will be described. The seat belt 20 (20C) is configured as a positional relationship passing between the fixed roller 52 and the moving roller 54. In the non-operating state of the second storage device 50 shown in FIG. 5, the fixing roller 52 and the movement of the second storage device 50 are moved when the seat belt 20 (20C) is stored in the first storage device 40. The rollers 54 are arranged and configured so that they can be performed without hindering the storage operation.

In this embodiment, the determination means for determining that the deformed portion 20b of the seat belt 20 has reached the storage start position of the second storage device 50 is configured as a mechanical configuration. The configuration is shown in FIG. As shown in FIGS. 5 and 6, the detection plate 64 as a detection tool is a position where the seat belt 20 passes and immediately before the seat belt 20 is stored by the first storage device 40, that is, FIGS. 5 and 6. 6 is disposed at a position immediately above the first storage device 40.
As shown in FIG. 7, the detection plate 64 has an insertion hole 72 through which the seat belt 20 passes. The hole shape of the insertion hole 72 is substantially equal to the cross-sectional shape of the normal shape portion 20 a of the seat belt 20. Precisely, the normal shape portion 20a of the seat belt 20 can be passed, but the deformed portion 20b is formed in a hole shape that cannot be passed.
As shown in FIG. 7, the deformed portion 20b of the seat belt 20 of the present embodiment has a thick structure formed by an air bag structure, and is thicker than the thickness of the conventional general-purpose portion 20a. ing. Therefore, the normal shape portion 20a of the seat belt 20 can pass through the insertion hole 72 of the detection plate 64, but the deformed portion 20b cannot pass. If the deformed portion 20b tries to pass through the insertion hole 72, the normal shape portion 20a and the deformed portion. The detection plate 64 is pushed downward as viewed in FIG. 7 by the step portion having a thickness difference from 20b. In the present embodiment, it is determined that the deformed portion 20b of the seat belt 20 has reached the storage start position of the second storage device 50 by the operation of pressing the detection plate 64.
As shown in FIGS. 5B and 6B, the detection plate 64 is formed in an L-shaped cross section, and an insertion hole 72 shown in FIG. A locking claw 74 is formed at the end of the other letter-shaped piece 64B. 5B, a locked portion 76 to which the locking claw 74 is locked is formed at the position of the slider 56 corresponding to the locking claw 74. The locking claw 74 and the locked portion 76 are formed. The slider 56 is held in the position shown in FIG. In the position state of the slider 56, the moving roller 54 is in a position close to the fixed roller 52.
The L-shaped detection plate 64 is attached to the fixed member so as to be rotatable about a fulcrum 78 at the L-shaped break point position. Therefore, when the piece 64A of the detection plate 64 is pushed downward as seen in FIG. 5B, the detection plate 64 rotates counterclockwise about the fulcrum 78. Then, the locking claw 74 formed on the other piece 64 </ b> B of the detection plate 64 is released from the locked state of the locked portion 76 of the slider 56, and the slider 56 is moved to the guide rail 58 by the tension spring force of the spring member 60. And move downward along.
As the slider 56 moves downward, the moving roller 54 attached via the attachment arm 66 also moves downward, and the fixed roller 52 and the moving roller 54 in the fixed position are separated from each other. To go. The separation operation of the moving roller 54 with respect to the fixed roller 52 causes the deformed portion 20b of the seat belt 20 to be retracted while being folded back by the moving roller 54 as shown in FIG. 6B. Is called. More specifically, when the detection start of the deformed portion 20b of the seat belt 20 by the second storage device 50 is determined by the detection plate 64, the downward movement of the moving roller 54 is started. From the state shown in B), the seat belt 20 is wound around the moving roller 54 and the seat belt is pulled downward. In this initial pulling stage, the seat belt 20 is pulled downward with the upper part of the fixed roller 52 being half-wound as shown in FIG. 6B. As the moving roller 54 moves downward, the storage length of the seat belt that is folded back and pulled by the moving roller 54 gradually increases.

Next, the operation of the embodiment having the above specific configuration will be described. Now, when the seat belt 20 shown in FIG. 1 is changed to the non-wearing state shown in FIG. 2, the seat belt 20 is stored by the seat belt storage device 30 including the first storage device 40 and the second storage device 50. Is started. First, since the winding belt portion 20C of the seat belt 20 is formed by the normal shape portion 20a, the winding belt portion 20C can pass through the insertion hole 72 of the detection plate 64, and is wound by the winding retractor device that is the first storage device. It is wound and stored.
When the shoulder belt part 20A of the seat belt 20 comes to the position of the insertion hole 72 of the detection plate 64, this shoulder belt part 20A cannot be passed through the insertion hole 72 because it is formed as the deformed portion 20b. In this state, the storage operation by the first storage device 40 ends. That is, the first storage device 40 is operated to store the normal shape portion 20a of the winding belt portion 20C.
When the deformed portion 20b of the shoulder belt portion 20A cannot pass through the insertion hole 72 and presses the detection plate 64 downward, the detection plate 64 rotates counterclockwise. By the rotation of the detection plate 64, the locking state between the locking claw 74 provided on the other piece 64B of the detection plate 64 and the locked portion 76 provided on the slider 56 is released, so that the slider 56 moves downward. become.
As the slider 56 moves downward, the moving roller 54 moves downward together. The downward movement of the moving roller 54 is performed as a movement away from the fixed roller 52 which is a base point of the retracting operation of the seat belt 20, and the downward movement of the moving roller 54 causes the deformed portion 20b of the shoulder belt portion 20A to be retracted and stored. Is done. The downward movement of the moving roller 54 is performed until the seat belt 20 comes into close contact with the front surface of the seat back 14 in the non-mounted state shown in FIG. 2, and the downward movement stops at this position. Thus, the shoulder belt portion 20A of the deformed portion 20b is stored by the second storage device.

According to the above embodiment, while the normal shape portion 20a of the winding belt portion 20C passes through the insertion hole 72 of the detection plate 64 as the determination means, the first storage device 40 causes the winding belt portion 20C of the winding belt portion 20C to pass. Storage is performed. When the deformed portion 20b of the shoulder belt portion 20A reaches the position of the detection plate 64, it cannot pass through the insertion hole 72 and operates the detection plate 64. Accordingly, it is determined that the storage start time by the second storage device 50 is reached, the locked state of the slider 56 is released, and the retracting and storing operation by the moving roller 54 is performed. According to this embodiment, the normal shape portion 20 a and the deformed portion 20 b are separately stored in the first storage device 40 and the second storage device 50. Therefore, each storage device can be reduced in size and can be easily installed in the seat back 14.
Moreover, in the said Example, since the 2nd storage apparatus 50 is comprised as a retractable flat apparatus, the thickness of apparatus itself can be comprised thinly. For this reason, it is possible to easily incorporate and equip a seat back having a relatively small thickness.

Although the embodiments and specific examples of the present invention have been described above, the present invention can be implemented in various other forms.
For example, the means for determining that the deformed portion of the seat belt has reached the storage start position of the second storage device has been described in the above embodiment in the case of the mechanical configuration using the detection plate 64. An electrical detection method such as counting the number of rotations of the apparatus may be used.
In addition, the second storage device of the above embodiment is a retractable flat device, but may be a retractable retractor device similar to the first storage device.

DESCRIPTION OF SYMBOLS 10 Vehicle seat 12 Seat cushion 14 Seat back 16 Headrest 18 Belt guide 20 Seat belt 20A Shoulder belt part 20B Lap belt part 20C Winding belt part 20a Normal shape part 20b Deformed part 30 Seat belt storage apparatus 40 First storage apparatus 50 Second storage device 52 Fixed roller 54 Moving roller 56 Slider 58 Guide rail 60 Spring member 62 Mounting bracket 64 Detection plate (detection unit)
64A One piece of detection plate 64B Other piece of detection plate 66 Mounting arm 68 Axial support 70 Axle support 72 Insertion hole 74 Locking claw 76 Locked portion 78 Support point M Crew (seat)

Claims (3)

A seat for a vehicle equipped with a seat belt in which one end portion of a seat belt disposed so as to restrain a seated person on the vehicle seat is accommodated by a seat belt accommodating device disposed in the seat back. ,
The seat belt has a different form such that at least a part of the part that restrains the seated person in the seat belt wearing state at the time of sitting is formed wider or thicker than the normal shape part of the other part. It is formed as a deformed part that is shaped,
The storage device for storing one end portion of the seat belt includes a first storage device and a second storage device, and the second storage device, the second storage device in the direction in which the one end portion of the seat belt is stored. Are arranged in series in the order of one storage device,
The normal shape portion from one end of the seat belt to the deformed portion is stored by the first storage device, and the deformed portion of the seat belt is stored by the second storage device. A vehicle seat equipped with a seatbelt. A vehicle seat equipped with the seat belt according to claim 1,
The first storage device is configured as a retractable retractor device,
The second storage device includes a fixed roller and a moving roller installed so as to be movable in a separation direction with respect to the fixed roller, and the seat belt is disposed in a form of being folded back with respect to the moving roller. A seat for a vehicle equipped with a seat belt, wherein the seat belt is stored in a deformed portion by movement of the seat belt in the separating direction. A vehicle seat equipped with the seat belt according to claim 1 or 2,
And determining means for determining that the deformed portion of the seat belt has reached the storage start position of the second storage device, and storing by the second storage device when it is determined by the determination means that the storage belt has reached the storage start position. A vehicle seat equipped with a seat belt characterized in that the operation is performed.

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