JP2016005948A - Seat belt device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat belt device in which a user wears both seat belts without fail in a four-point type seat belt device where a three-point type seat belt device and a two-point type seat belt device are used together.SOLUTION: In a vehicle seat belt device 100, a three-point type seat belt 10's engaging part (three-point side buckle 16) has a detection part for detecting engagement of an engaged part (three-point side tongue 14), and when the detection part detects engagement of the engaged part, which indicates wearing of the three-point type seat belt 10, a window side fixing part fixing an end part or a middle part of webbing 22 of a two-point type seat belt 20 is designed to move from a front side position to a back side position.

Description

  The present invention relates to a seat belt device that constitutes a four-point seat belt by a three-point seat belt and a two-point seat belt.

  Conventionally, the three-point seat belt device, which has been widely used, supports the load on the upper body of the occupant diagonally from the left and right shoulders and by a single webbing that extends to the vicinity of the other waist, increasing chest deflection. There is a problem of doing. On the other hand, a collision in which a part of the front of the vehicle body hits another vehicle or an obstacle in an automobile collision is called an offset collision. Of these offset collisions, a collision in which the driver seat side 1/4 of the front portion hits another vehicle or an obstacle is called a small overlap collision. When an automobile has a small overlap collision or an oblique collision (oblique), the webbing is detached from the shoulder because it is supported by one oblique webbing.

  As a seat belt device that does not cause such a problem, a four-point seat belt device has been proposed. However, the four-point seat belt device has a problem that the mounting is not completed in one operation. There has also been proposed a four-point seat belt device that uses both a three-point seat belt device and a two-point seat belt device that supports the vicinity of the occupant's waist with a single webbing from right to left. In such a four-point seat belt device, the user can select whether or not to wear the two-point belt. Moreover, it is necessary to wear a three-point seat belt and a two-point seat belt, which is troublesome twice. Therefore, there is a problem that the user does not wear the two-point seat belt and the same as the three-point seat belt device.

  In the two-point seat belt device, a device has been proposed that prevents the occupant from wearing the seat belt by moving the belt and restraining the occupant when it detects that the occupant is seated on the seat (Patent Literature). 1).

JP-A-1-73061

  However, since the above-described two-point seat belt device restrains movement with the seat belt immediately after sitting on the seat, the following inconvenience occurs. When taking out an object from a dashboard or operating a navigation device, there is a problem that the seat belt is troublesome. Further, the above-described two-point seat belt device is not considered to be used in combination with the three-point seat belt device.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a four-point seat belt device using both a three-point seat belt device and a two-point seat belt device. It is to provide a seat belt device that is securely mounted.

  The seat belt device according to the present invention is a vehicle seat belt device including a two-point seat belt and a three-point seat belt, wherein the two-point seat belt fixes one end or midway of the webbing above the seat window. A window-side fixing portion that is movable between a front position and a rear position of the seat, and a first center-side fixing portion that fixes the other end of the webbing and is located on a side portion of the seat on the vehicle center side. The three-point seat belt is inserted through the webbing through a feeding part that feeds out webbing from an upper part of the seat on the vehicle center side, an engaging part provided on a side part on the window side of the seat. An engaged portion that has an insertion hole and is fixed by being engaged with the engaging portion, and a second central side fixing that fixes one end of the webbing on a side portion of the seat on the vehicle central side And the engagement Has a detecting portion for detecting engagement of the engaged portion, and when the detecting portion detects engagement of the engaged portion indicating attachment of the three-point seat belt, the two-point seat The belt has a moving mechanism for moving the window side fixing portion from the front side position to the rear side position.

  In the present invention, the engaging portion (buckle or tongue) of the three-point seat belt includes a detecting portion, and when the detecting portion detects the engagement of the engaged portion (tang or buckle), 2 The window side fixing part of the point type seat belt is moved from the front side of the seat to the rear side of the seat. As a result, the occupant wears the three-point seat belt and the two-point seat belt, so that the same restraint as the four-point seat belt can be obtained.

  The seat belt device according to the present invention has arrived at the predetermined position, the second detection unit for detecting that the window side fixing portion has arrived at a predetermined position between the seat back side position from the side of the seat back. When the 2nd detection part detects this, it is provided with the restraint part which restrains the movement of the said window side fixing | fixed part.

  In the present invention, when the second detection unit detects that the window side fixing part of the two-point seat belt has arrived at a predetermined position, that is, the two-point seat belt is in a state of restraining the occupant. In the case, a restraining portion that restrains the movement of the window side fixing portion is provided. As a result, the occupant can be restrained appropriately by the two-point seat belt.

  In the seat belt device according to the present invention, when the detection unit detects the disengagement of the engaged portion, the restraint of the movement of the window side fixing portion is released and the window side fixing portion is moved to the front side position. A release mechanism is provided.

  In the present invention, when the detection part of the three-point seat belt detects the disengagement of the engaged part (tang or buckle), the restriction of the movement of the window side fixing part of the two-point seat belt is released, Since the window side fixing portion is moved to the front side position of the seat, the two-point seat belt can be released almost simultaneously with the release of the three-point seat belt.

  The seat belt device according to the present invention is characterized in that the first central fixing portion is a retractor.

  In the present invention, since the first center side fixing portion is a retractor, it is possible to make the length of the webbing of the two-point seat belt suitable for the position of the seat and the physique of the occupant. It becomes.

  The seat belt device according to the present invention is characterized in that a retractor is provided below the window side fixing portion, and the first center side fixing portion is integrated with the second center side fixing portion.

  In the present invention, since the first center-side fixing portion of the two-point seat belt is integrated with the second center-side fixing portion, it is possible to reduce the number of parts installed on the center side of the vehicle.

  In the seat belt device according to the present invention, the two-point seat belt has a guide part for guiding the movement of the window side fixing part, and at least a part of the guide part is located at the upper part of the window and extends in the longitudinal direction of the vehicle. It is provided so that it may extend along the skeleton member over which it extends.

  In the present invention, since the guide part for guiding the movement of the window side fixing part is provided along the skeleton member in the longitudinal direction of the vehicle, the guide part can be integrated with the diaphyseal member. .

  The seat belt device according to the present invention is characterized in that the engaging portion is a buckle (or tongue) and the engaged portion is a tongue (or buckle).

  In the present invention, since the engaging portion of the three-point seat belt is a buckle (or tongue) and the engaged portion is a tongue (or buckle), the occupant is similar to the conventional three-point seat belt. Can reliably attach a three-point seat belt.

  The seat belt device according to the present invention includes an acquisition unit that acquires the traveling speed of the vehicle, the acquired traveling speed is a positive value less than a predetermined value, and the detection unit detects engagement of the engaged portion. If not, the moving mechanism moves the window side fixing portion to a standby position located between the front side position and the rear side position.

  In the present invention, when the traveling speed is a positive value less than the predetermined value and the three-point seat belt is not attached, the window side fixing portion is moved to the standby position, so the vehicle travels without attaching the seat belt. Even in such a case, the two-point seat belt does not get in the way of driving.

  In the seat belt device according to the present invention, when the window-side fixing portion is in the standby position and the traveling speed acquired by the acquisition unit is equal to or higher than the predetermined value, the moving mechanism moves the window-side fixing portion from the standby position. It is configured to move to a predetermined position between the rear positions.

  In the present invention, when the traveling speed of the vehicle is equal to or higher than a predetermined value, the window side fixing portion is moved to a predetermined position. That is, since the two-point seat belt restrains the occupant, even if the occupant travels without wearing the three-point seat belt, it can be prevented from continuing running without wearing the seat belt at all. It becomes.

  The seat belt device according to the present invention includes a release mechanism that moves the window side fixing portion to the front side position, the window side fixing portion is at the predetermined position, and the detection portion releases the engagement of the engaged portion. When the traveling speed detected and acquired by the acquisition unit is less than a predetermined value, the release mechanism moves the window-side fixing unit to the standby position.

  In the present invention, when the three-point seat belt is released and the traveling speed of the vehicle is less than the predetermined value, the window side fixing portion is moved to the standby position, so the vehicle is traveling without wearing the seat belt. Even in this case, the two-point seat belt does not get in the way of driving.

  In the seat belt device according to the present invention, when the window side fixing portion is in the standby position and the traveling speed acquired by the acquisition portion is 0, the release mechanism moves the window side fixing portion to the front side position. It is characterized by the above.

  In the present invention, when the three-point seat belt is released and the traveling speed of the vehicle is 0, that is, when the vehicle is stopped, the two-point seat belt is released, so that the passenger gets off the vehicle. In this case, the two-point seat belt does not get in the way.

  The seat belt device according to the present invention is characterized in that the first central fixing portion is a retractor.

  In the present invention, since the first center side fixing portion is a retractor, it is possible to make the length of the webbing of the two-point seat belt suitable for the position of the seat and the physique of the occupant. It becomes.

  The seat belt device according to the present invention is characterized in that a retractor is provided below the window side fixing portion, and the first center side fixing portion is integrated with the second center side fixing portion.

  In the present invention, since the first center-side fixing portion of the two-point seat belt is integrated with the second center-side fixing portion, it is possible to reduce the number of parts installed on the center side of the vehicle.

  In the seatbelt device according to the present invention, when the detection unit detects the engagement of the engaged portion, the moving mechanism waits for the window-side fixing unit to be positioned between the front position and the rear position. It is characterized by being moved to a position.

  In the present invention, when the detection unit detects the engagement of the engaged portion, the window side fixing portion of the two-point seat belt is moved to the standby position instead of the rear position. Thereby, in order to engage the engaged portion with the engaging portion, it is possible to prevent the two-point seat belt from hitting the head of the occupant lowered in the direction of the engaged portion.

  The seat belt device according to the present invention includes a state acquisition unit that acquires a vehicle state indicating whether the vehicle is traveling or stopped, and when the acquired vehicle state is a traveling state, the moving mechanism includes: The window side fixing portion is moved from the standby position to a predetermined position between the rear side positions.

  In the present invention, when the vehicle is in a traveling state, the window side fixing portion at the standby position is moved to a predetermined position on the rear side. As a result, the occupant can be fitted with the two-point seat belt.

  In the seat belt device according to the present invention, when the detection unit does not detect the engagement of the engaged portion, the moving mechanism moves the window side fixing portion to the front side position. Features.

  In the present invention, when the detecting portion does not detect the engagement of the engaged portion, the window-side fixing portion is moved to the front position, so that the two-point seat belt can be appropriately released. .

  A seatbelt device according to the present invention includes a seating reception unit that receives a notification that an occupant is seated on the seat, and an elevating mechanism that raises or lowers the engagement unit, and that the seating reception unit is seated. When the notification is received and the detection unit does not detect the engagement of the engaged portion, the elevating mechanism raises the engagement portion.

  In the present invention, when the notification that the occupant is seated on the seat is received and the detection unit does not detect the engagement of the engaged portion, the elevating mechanism raises the engagement. While prompting the three-point seat belt device, the operation of engaging the engaged portion with the engaging portion is facilitated.

  In the seat belt device according to the present invention, the engagement portion includes a light emitting element, and includes a light emission control unit that controls light emission of the light emitting element, receives a notification that the seating reception unit is seated, and detects the detection When the unit does not detect the engagement of the engaged portion, the light emission control unit emits the light emitting element.

  In the present invention, when the notification that the occupant is seated on the seat is received and the detection unit does not detect the engagement of the engaged portion, the light emitting element emits light. The position can be easily confirmed, and the engaged portion can be engaged with the engaging portion.

  When the seat belt device according to the present invention receives a notification that the seat receiving unit is seated, and the detection unit detects the engagement of the engaged portion, the lifting mechanism is configured to It is characterized by lowering.

  In the present invention, when the notification that the seating receiving part is seated is received and the detection part detects the engagement of the engaged part, the elevating mechanism lowers the engaging part. Even if there is slack in the seat belt, it can be improved.

  When the seat belt device according to the present invention receives a notification that the seating receiving unit is seated and the detection unit detects the engagement of the engaged portion, the light emission control unit is configured to transmit the light emitting element. Is characterized by being turned off.

  In the present invention, when the seating detection unit detects the occupant's seating and the detection unit detects the engagement of the engaged portion, the light emitting element is turned off, thereby preventing unnecessary power consumption. It becomes possible.

  In the present invention, the engaging portion (buckle or tongue) of the three-point seat belt includes a detecting portion, and when the detecting portion detects the engagement of the engaged portion (tang or buckle), 2 The window side fixing part of the point type seat belt is moved from the front side of the seat to the rear side of the seat. As a result, the occupant wears the three-point seat belt and the two-point seat belt, so that the same restraint as the four-point seat belt can be obtained.

1 is a front view showing a configuration of a seat belt device according to Embodiment 1. FIG. FIG. 3 is a front view showing a state in which an occupant wears a three-point seat belt. It is an enlarged view for demonstrating engagement with a 3 point side tongue and a 3 point side buckle. 1 is a front view showing a configuration of a seat belt device according to Embodiment 1. FIG. FIG. 3 is a side view showing a configuration when the seat belt device according to Embodiment 1 is viewed from the vehicle center side. FIG. 3 is a block diagram illustrating a hardware configuration of a seat belt device that performs an operation control process of a two-point seat belt. It is a flowchart which shows the process sequence of operation | movement control of a two-point seatbelt. It is a flowchart which shows the process sequence of operation | movement control of a two-point seatbelt. It is explanatory drawing which shows an example of the change of a regulation value. It is a graph which shows the difference between the speed at the time of wearing, and the speed at the time of cancellation. It is a flowchart which shows the process sequence of operation | movement control of a two-point seatbelt. It is a flowchart which shows the process sequence of operation | movement control of a two-point seatbelt. FIG. 6 is a front view illustrating a configuration of a seat belt device according to a third embodiment. FIG. 6 is a front view illustrating a configuration of a seat belt device according to a third embodiment. It is a side view which shows the structure at the time of seeing the seatbelt apparatus which concerns on Embodiment 3 from the vehicle center side. It is explanatory drawing which shows the position of a 2 point | piece side belt. It is explanatory drawing which shows the positional relationship of a steering and a 2 point | piece side belt. It is explanatory drawing which shows the positional relationship of a steering and a 2 point | piece side belt. It is explanatory drawing which shows the standby state of a two-point seat belt. It is explanatory drawing which shows the standby state of a two-point seat belt. It is a state transition diagram of a two-point seat belt. It is explanatory drawing which shows the structure of the hardware regarding a two-point seat belt. It is a flowchart which shows the procedure of the control process of a two-point type | mold sieve belt. It is a flowchart which shows the process sequence of a cancellation | release state process. It is a flowchart which shows the process sequence of a mounting state process. It is a flowchart which shows the process sequence of a standby state process. It is a flowchart which shows the process sequence of a driving | running | working state determination process. It is a flowchart which shows the procedure of the control process of a two-point type | mold sieve belt. It is a flowchart which shows the process sequence of a driving | running | working state determination process. FIG. 10 is a front view illustrating a configuration of a seat belt device according to a sixth embodiment. It is the elements on larger scale near the raising / lowering mechanism. It is a flowchart which shows the process sequence of operation | movement control of a three-point type seatbelt.

(Embodiment 1)
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing the configuration of the seat belt device 100 according to the first embodiment. FIG. 2 is a front view showing a state in which the occupant M wears the three-point seat belt 10. FIG. 3 is an enlarged view for explaining the engagement between the three-point side tongue 14 and the three-point side buckle 16. As shown in FIG. 1, a seat 30 including a seat cushion 1 and a seat back 2 and a seat belt device 100 are installed in the passenger compartment 30. The seat belt device 100 includes a two-point seat belt 20 and a three-point seat belt 10.

  The three-point seat belt 10 includes a three-point retractor 11, a webbing (hereinafter referred to as “three-point side belt”) 12, and a three-point side anchor (second center side fixing portion) 15.

  The three-point side retractor 11 is embedded in the seat back 2. The three-point side retractor 11 fixes one end of the three-point side belt 12 inside. The three-point anchor 15 is fixed to the frame on the side of the seat cushion 1 on the vehicle center side. The three-point anchor 15 fixes the other end of the three-point belt 12. A three-point guide portion 13 is provided at the vehicle center side upper portion of the seat back 2. The three-point anchor 15 may be provided on the floor 31 on the vehicle center side.

  The three-point side guide portion 13 is installed on the seat back 2 such that a rectangular opening that guides the three-point side belt 12 wound inside the seat back 2 or pulled out faces the seating direction. . The three-point side belt 12 fed out from the three-point side retractor 11 is guided forward of the seat back 2 by the three-point side guide portion 13. A three-point side tongue 14 is attached in the middle of the three-point side belt 12. The three-point side tongue 14 is a T-shaped plate. An engagement hole 141 is formed at the approximate center of the tip of the three-point tongue 14. Further, an insertion hole 142 through which the three-point belt 12 is inserted is provided at the rear end of the three-point tongue 14.

  A three-point side buckle plate 17 is fixed to the lower frame on the window side of the seat cushion 1, and a three-point side buckle 16 is connected to the opposite side of the fixed position of the three-point side buckle plate 17. The three-point buckle plate 17 includes a fixing part 172 and a connecting part 171. The three-point buckle plate 17 is fixed to the vehicle or the seat cushion 1 by a fixing portion 172 such as a bolt located at a substantially lower central portion. The three-point side buckle plate 17 rotates about a fixed angle around the fixed portion 172. The connecting portion 171 is located between the upper part of the three-point side buckle plate 17 and the three-point side buckle 16. The connecting portion 171 has a belt shape like webbing.

  A procedure for attaching the three-point seat belt 10 to the occupant M will be described with reference to FIG. The occupant M grips the three-point side tongue 14 that is suspended from the vehicle center side upper portion of the seat back 2. Subsequently, the occupant M moves the gripped three-point side tongue 14 so that the three-point seat belt is obliquely hung from the right shoulder to the left waist. Then, the occupant M engages the moved three-point side tongue 14 with the three-point side buckle 16 fixed by the three-point side buckle plate 17 in the lower part of the seatback 2 on the window side. The engagement of the three-point tongue 14 is performed by engaging a lock portion (not shown) inside the three-point buckle 16 with the engagement hole 141.

  Thereby, the three-point side belt 12 that intersects the left waist from the right shoulder of the occupant M functions as the shoulder belt portion 6 and restrains the upper body of the occupant M. The three-point belt 12 that crosses both legs and the lower abdomen from the vehicle center side to the window side functions as the lap belt portion 5 and restrains the lower body of the occupant M. The three-point buckle plate 17 includes a connecting portion 171. Thereby, since the three-point side buckle 16 can rotate by a predetermined angle about the longitudinal direction, the three-point side tongue 14 can be easily engaged with the three-point side buckle 16.

  When the three-point seat belt 10 is mounted, the three-point retractor 11 sends the three-point belt 12 into the vehicle via the three-point side guide portion 13 by pulling the three-point side tongue 14 of the occupant M. . When the three-point side belt 12 is fed, the length of the three-point side belt 12 from the three-point side guide portion 13 through the three-point side tongue 14 to the three-point side anchor 15 is increased. When the three-point side tongue 14 comes into contact with the three-point side buckle 16, the three-point side retractor 11 stops feeding the three-point side belt 12. Thus, the restraint of the occupant M is realized by the three-point support by the three-point side guide portion 13, the three-point side buckle 16 and the three-point side anchor 15.

  When releasing the three-point seat belt 10, a release button 161 provided on the three-point buckle 16 is pressed. When the release button 161 is pressed, the engagement between the locking portion (not shown) of the three-point side buckle 16 and the engagement hole 141 is released, and the engagement between the three-point side tongue 14 and the three-point side buckle 16 is released. When the engagement is released, the three-point side retractor 11 winds the three-point side belt 12 inside. The three-point side retractor 11 winds the three-point side belt 12 until the three-point side tongue 14 reaches the three-point side guide portion 13.

  The two-point seat belt 20 includes a two-point side retractor (first center side fixing portion) 21, a webbing (hereinafter referred to as “two-point side belt”) 22, and a two-point side shoulder anchor (window side fixing portion) 231. Consists of including.

  The two-point retractor 21 is provided on the frame on the side of the seat cushion 1 on the vehicle center side. The two-point retractor 21 is provided at a position closer to the vehicle floor 31 than the three-point retractor 11. The two-point side retractor 21 fixes one end of the two-point side belt 22 inside. A two-point shoulder anchor 231 is provided at the other end of the two-point side belt 22. As will be described later, at least a part of the guide rail 232 is provided along the side roof (frame member) 3 at the upper part of the window. With this configuration, the two-point side belt 22 extends from the vehicle center side lower part to the window side upper part.

  The two-point side shoulder anchor 231 is movable along the guide rail 232. What is necessary is just to comprise using a well-known technique as a mechanism which moves the 2-point side shoulder anchor 231. FIG. For example, a reversible motor (not shown) is provided on the B pillar, and the motor and the two-point shoulder anchor 231 are connected by a wire or tape having rigidity that moves along the guide rail 232. The two-point side shoulder anchor 231 can be moved along the guide rail 232 by winding or unwinding the wire or tape by the motor. The moving mechanism 23 for the two-point seat belt 20 includes a motor that moves the two-point shoulder anchor 231, the guide rail 232, and the two-point shoulder anchor 231.

  The two-point seat belt 20 shown in FIG. 2 is in a state where the two-point belt 22 does not restrain the occupant M. In this case, the two-point side belt 22 is located in front of the seat cushion 1.

  FIG. 4 is a front view showing the configuration of the seat belt device 100 according to the first embodiment. FIG. 5 is a side view showing a configuration when seat belt device 100 according to Embodiment 1 is viewed from the vehicle center side. 4 and 5, how the two-point seat belt 20 is attached to the occupant M after the three-point seat belt 10 shown in FIG. 2 is attached will be described.

  Although not specifically shown, the three-point buckle 16 of the three-point seat belt 10 incorporates a three-point buckle switch that detects the engagement state with the three-point tongue 14. This three-point buckle switch functions as a detector.

  When the three-point buckle switch incorporated in the three-point buckle 16 detects that the occupant M has attached the three-point seat belt 10, the two-point shoulder anchor 231 of the two-point seat belt 20 The vehicle moves along the H.232 from the front of the vehicle to the rear of the vehicle. Although not shown, for example, a locking mechanism is provided that is locked between the guide rail 232 and the two-point side shoulder anchor 231. When the movement of the two-point side shoulder anchor 231 to the rear of the vehicle is completed, the position of the two-point side shoulder anchor 231 is fixed by the lock mechanism provided on the guide rail 232. That is, the movement of the two-point side shoulder anchor 231 is restricted. The lock mechanism functions as a restraining portion.

  The above-described locking mechanism is configured such that, for example, when the two-point side shoulder anchor 231 that has moved to the rear end of the guide rail 232 by the motor cannot move any more, the motor rotates, so that the lock member becomes the two-point side shoulder anchor 231. It is configured to be more exposed and mesh with the guide rail 232 to restrain the movement of the two-point side shoulder anchor 231. By rotating the motor in the reverse direction, the engagement between the lock member and the guide rail 232 is released, and the restriction on the movement of the two-point side shoulder anchor 231 is released. By further reversely rotating the motor, the two-point side shoulder anchor 231 moves to the front end of the guide rail 232. Although not shown, a motor or the like that releases the lock and moves the two-point side shoulder anchor 231 to the front end constitutes a release mechanism.

  Although not shown, as a detection unit that detects the position of the guide rail 232, for example, a micro switch is provided at a predetermined position of the guide rail 232. The detection unit may be configured with an optical sensor, or may be configured with a rotary encoder that detects rotation of a motor for moving the two-point side shoulder anchor 231. A micro switch that detects that the two-point side shoulder anchor 231 has reached the rear end of the guide rail 232 constitutes a second detection unit.

  Before the two-point seat belt 20 is mounted, the two-point side shoulder anchor 231 is in a position in front of the seat. The two-point side belt 22 is wound around the two-point side retractor 21 almost without slack over the shortest distance connecting the two-point side retractor 21 and the two-point side shoulder anchor 231. After the occupant M wears the three-point seat belt 10, the two-point shoulder anchor 231 moves along the guide rail 232 to the rear upper part of the seat cushion 1. As described above, the two-point side belt 22 intersects from the upper left shoulder of the occupant M toward the right waist to form the shoulder belt portion 7. The shoulder belt portion 7 restrains the occupant M by the two points of the two-point side retractor 21 and the two-point side shoulder anchor 231. Note that one end of the guide rail 232 is in the vehicle front side direction of the side roof 3 or a predetermined position of the A pillar (front pillar). The predetermined position is preferably a position where the two-point seat belt 20 does not get in the way when the occupant M gets into the vehicle. The other end of the guide rail 232 is a predetermined position of the B pillar (center pillar) 4. The predetermined position is a position where the occupant M can be appropriately restrained by the two-point seat belt 20 even when the occupant M having a different physique gets on, even when the seat position or the inclination of the seat back 2 changes. Is desirable. If such a condition is satisfied, the other end of the guide rail 232 may be positioned at the rear side of the vehicle on the side roof 3 instead of the B pillar 4.

  Next, operation control of the two-point seat belt 20 will be described. FIG. 6 is a block diagram illustrating a hardware configuration of the seat belt device 100 that performs the operation control process of the two-point seat belt 20. The operation of the two-point seat belt 20 is controlled by a control unit 71, a RAM (Random Access Memory) 75, a three-point side buckle switch 162, a two-point side shoulder anchor moving unit 72, and a two-point side shoulder anchor position fixing unit 73, This is executed by the point-side shoulder anchor position detector (second detector) 74 and the like. A control unit 71 such as an ECU (Electronic Control Unit) is connected to each hardware unit via a transmission line by a CAN (Controller Area Network), and controls them according to a control program 75P stored in the RAM 75. Perform various software functions. The two-point side shoulder anchor moving unit 72 is a mechanism for moving the two-point side shoulder anchor 231 along the guide rail 232, and the configuration thereof is as described above. The two-point side shoulder anchor position fixing unit 73 is a mechanism that restrains the movement of the two-point side shoulder anchor 231 and fixes the position, and the configuration thereof is as described above. The two-point side shoulder anchor position detection unit 74 detects the position of the two-point side shoulder anchor 231 on the guide rail 232. The two-point side shoulder anchor position detection unit 74 detects the position of the two-point side shoulder anchor 231 from the output of a rotation sensor such as a rotary encoder attached to a motor or gear provided in the two-point side shoulder anchor moving unit 72. Alternatively, position detection switches such as micro switches are attached to a plurality of locations on the guide rail 232, and the position of the two-point side shoulder anchor 231 is detected by the output of the position detection switch.

  The three-point side buckle switch 162 (detection unit) detects the engagement state between the three-point side buckle 16 and the three-point side tongue 14, such as a Hall IC disclosed in Japanese Patent Application Laid-Open No. 2006-12504. A switch having a magnetic sensor is used. When the three-point side buckle 16 and the three-point side tongue 14 are engaged, a low signal (or a high signal) indicating that the three-point seat belt 10 is in the mounted state is output from the three-point side buckle switch 162. 71 is output. On the other hand, when the three-point buckle 16 and the three-point tongue 14 are not engaged, a high signal (low signal) indicating that the three-point seat belt 10 is not in the mounted state is output from the three-point buckle switch 162. It is output to the control unit 71.

  A processing procedure for operation control of the two-point seat belt 20 in the above hardware configuration will be described with reference to a flowchart. 7 and 8 are flowcharts showing a processing procedure for operation control of the two-point seat belt 20. The controller 71 reads the output of the three-point buckle switch 162 and determines whether or not the three-point tongue 14 is engaged with the three-point buckle 16 (step S81). When the controller 71 determines that the three-point tongue 14 is engaged with the three-point buckle 16 (YES in step S81), the controller 71 causes the two-point shoulder anchor position detector 74 to It is determined whether or not the side shoulder anchor 231 has reached the rear end (step S82). When it is determined that the two-point side shoulder anchor 231 has reached the rear end (YES in step S82), the control unit 71 stops driving the motor of the two-point side shoulder anchor moving unit 72 (step S83). Subsequently, the control unit 71 fixes the position of the two-point side shoulder anchor 231 by the two-point side shoulder anchor position fixing unit 73 (step S84), and ends the process.

  When it is determined that the two-point side shoulder anchor 231 has not reached the rear end (NO in step S82), the control unit 71 starts normal rotation driving of the motor of the two-point side shoulder anchor moving unit 72, and the two-point side The shoulder anchor 231 is moved to the rear end (step S85). If the motor has already been driven forward, the drive is continued. Next, the control unit 71 determines whether or not the motor drive current value of the two-point side shoulder anchor moving unit 72 is equal to or less than a specified value (step S86). When the motor drive current is not more than the specified value (YES in step 86), the control unit 71 returns the process to step S81.

  If the motor drive current exceeds the specified value (NO in step S86), the control unit 71 stops driving the motor of the two-point side shoulder anchor moving unit 72 (step S87). Subsequently, the control unit 71 performs error processing (step S88) and ends the processing.

  If it is determined that the three-point tongue 14 is not engaged with the three-point buckle 16 (NO in step S81), the controller 71 causes the two-point shoulder anchor position detector 74 to detect the two-point shoulder anchor 231. It is determined whether or not has reached the front end (step S89). When it is determined that the two-point side shoulder anchor 231 has reached the front end (YES in step S89), the control unit 71 stops driving the motor of the two-point side shoulder anchor moving unit 72 (step S90). Subsequently, the control unit 71 fixes the position of the two-point side shoulder anchor 231 by the two-point side shoulder anchor position fixing unit 73 (step S91), and ends the process.

  When it is determined that the two-point side shoulder anchor 231 has not reached the front end (NO in step S89), the control unit 71 starts the reverse rotation driving of the motor of the two-point side shoulder anchor moving unit 72, and the two-point side shoulder anchor 231 is moved to the front end (step S92). If the motor has already been driven in reverse, the drive is continued. Next, the control unit 71 determines whether or not the motor drive current value of the two-point side shoulder anchor moving unit 72 is equal to or less than a specified value (step S93). If the motor drive current is equal to or less than the specified value (YES in step S93), the control unit 71 returns the process to step S81.

  If the motor drive current exceeds the specified value (NO in step S93), the control unit 71 stops driving the motor of the two-point side shoulder anchor moving unit 72 (step S94). The control unit 71 performs error processing (step S95) and ends the processing. The control unit 71 performs the processing shown in FIGS. 7 and 8 every predetermined time.

  7 and 8, when the motor drive current value exceeds a specified value, the motor drive is stopped to prevent danger. When the two-point side shoulder anchor 231 is moving normally, the motor should only be loaded within a certain range, so the motor drive current value does not exceed the specified value. However, when the two-point side belt 22 is caught by the occupant M or equipment in the vehicle, or when the occupant M pinches the two-point side shoulder anchor 231 or the guide rail 232, the load on the motor is increased. Since it increases, the drive current value increases. Therefore, when the drive current value exceeds the specified value, the motor drive is stopped and error processing is performed. Here, the error processing is a display for prompting confirmation of whether there is an abnormality in the two-point seat belt 20, and the control unit 71 displays on a display device (not shown) or sounds a buzzer (not shown). To do. After the error occurs, the occupant M confirms safety and then operates a return switch (not shown) to return to normal operation.

  The above specified value is changed depending on the position of the guide rail 232. This is because the guide rail 232 has a bent portion instead of a straight line because the guide rail 232 has a shape along the door. Since the mechanical resistance is greater at the bent portion than at the straight portion, the specified value must be increased. Specifically, the position of the two-point side shoulder anchor position detector 74 on the guide rail 232 of the two-point side shoulder anchor 231 is detected, and the specified value is changed according to the detected position. FIG. 9 is an explanatory diagram showing an example of a change in the specified value. An example of the guide rail 232 is shown in the upper part of FIG. The bent portion of the guide rail 232 is marked with an asterisk. The lower part of FIG. 9 is a graph showing the correspondence between the position of the guide rail 232 and the predetermined value. The vertical axis represents the current value, and the unit is, for example, mA. The horizontal axis indicates the position from the rear of the guide rail 232 as a distance, and the unit is, for example, cm. As shown in the graph, between the distances L1 and L2 and between L3 and L4 is a bent portion of the guide rail 232, so that the specified value is set high from normal I1 to I2.

  Next, the setting of the moving speed of the two-point side shoulder anchor 231 will be described. The speed of the two-point side shoulder anchor 231 when the two-point seat belt 20 is released is set to be faster than when the two-point seat belt 20 is attached. When the two-point seat belt 20 is worn, the two-point side belt 22 approaches, so that the movement speed is set to be slow so as not to give the passenger M a feeling of fear. On the other hand, when releasing, since the two-point side belt 22 moves away, the occupant M is not feared even at an early movement speed.

  Here, the motor of the two-point side shoulder anchor moving unit 72 is a DC motor and will be described as performing PWM (Pulse Width Modulation) control. FIG. 10 is a graph showing the difference between the speed at the time of wearing and the speed at the time of release. The vertical axis represents the Duty ratio, which is a dimensionless quantity. The horizontal axis is the distance from the rear of the guide rail 232. The unit is, for example, cm. As shown in FIG. 10, the duty ratio at the time of release is set to be about 25% larger than the duty ratio at the time of wearing. In PWM control, the greater the duty ratio, the greater the motor speed, so the speed increases at the time of release.

  By doing so, there are the effects of improving the texture when the two-point seat belt 20 is worn and not getting in the way of getting off at the time of release.

  As described above, in the seat belt device 100 according to the first embodiment, when the occupant M engages the three-point side buckle 16 in order to mount the three-point seat belt 10, the two-point type is applied. The seat belt 20 is attached. When the three-point side tongue 14 is removed from the three-point side buckle 16 so that the occupant M releases the three-point seat belt 10, the two-point seat belt 20 is released from the restraint on the occupant M.

  The seat belt device 100 according to Embodiment 1 has the following effects. The occupant M operates the three-point buckle 16 as a trigger (trigger) to operate the two-point seat belt 20. As a result, the occupant M can wear the three-point seat belt 10 and the two-point seat belt 20 in one operation (one action). As a result, the seat belt device 100 according to the first embodiment functions as a four-point seat belt, and thus has the effects of preventing shoulder slippage and reducing chest load.

  Further, even if the occupant M is seated, if the three-point seat belt 10 is not attached, the two-point seat belt 20 is also not attached, so that the occupant M takes out an object from the dashboard or operates the navigation device. In this case, the seat belt does not feel annoying. In addition, when viewed from the occupant M, the two-point seat belt 20 is always mounted on the front side (upper side) of the three-point seat belt 10. In the case of the reverse arrangement, the three-point seat belt 10 is not removed, but the two-point seat belt 10 is removed when the two-point seat belt 20 is removed by door interlocking or seating interlock. There arises a problem that the belt 20 is prevented from being released. However, the seat belt device 100 according to Embodiment 1 does not have such a problem. Furthermore, when the occupant M removes the three-point side tongue 14 of the three-point seat belt 10 from the three-point side buckle 16, the two-point seat belt 20 is quickly released. As a result, the three-point side belt 12 is wound around the three-point side retractor 11, thereby preventing the occurrence of a problem that the moving three-point side tongue 14 and the two-point seat belt 20 are entangled. It becomes possible.

  On the other hand, when the two-point side shoulder anchor 231 is moved, if the motor drive current value of the two-point side shoulder anchor moving unit 72 exceeds a specified value, the motor is stopped. Even when it is sandwiched between the two-point side shoulder anchor 231 and the guide rail 232, it is possible to prevent a serious accident from occurring. Further, even when a foreign object is caught in the guide rail 232, it is possible to prevent an excessive load from being applied to the motor.

(Embodiment 2)
The seat belt device 100 according to the second embodiment has a risk prevention function when the occupant M forgets to wear the seat belt and starts the vehicle. The difference between the first embodiment and the second embodiment is the operation control of the two-point seat belt 20. Since the hardware configuration of the seat belt device 100 is the same, the description thereof is omitted below.

  FIG. 11 and FIG. 12 are flowcharts showing a processing procedure for operation control of the two-point seat belt 20. 11 and 12, the same processing steps as those in FIGS. 7 and 8 are assigned the same step numbers and description thereof is omitted. In the second embodiment, the operation after the controller 71 determines that the three-point tongue 14 is not engaged with the three-point buckle 16 in step S81 is different. This will be described below.

  When the control unit 71 determines that the three-point side tongue 14 is not engaged with the three-point side buckle 16 (NO in step S81), the control unit 71 determines whether or not the vehicle speed is equal to or higher than a specified value. Determination is made (step S96). The vehicle speed is obtained from a speedometer, for example. If the vehicle speed is less than the specified value (NO in step S96), the vehicle is running or stopped at a speed less than the specified value, and the three-point seat belt 10 is released. Is a process after step S89 to release the two-point seat belt 20. Since these processes are the same as those in the first embodiment, description thereof is omitted.

  If the vehicle speed is equal to or higher than the specified value (YES in step S96), the control unit 71 moves the process to step S82 and causes the two-point side shoulder anchor moving unit 72 to perform the operation of attaching the two-point seat belt 20. Since the process after step S82 is the same as that of Embodiment 1, description is abbreviate | omitted.

  With the above operation, the seat belt apparatus 100 according to the second embodiment has the following effects in addition to the effects exhibited by the seat belt apparatus 100 according to the first embodiment. When the vehicle starts to travel with the three-point seat belt 10 not attached, the two-point side shoulder anchor moving portion 72 of the two-point seat belt 20 is moved backward when the traveling speed reaches a specified value or more. The occupant M is restrained by the two-point seat belt 20. As a result, even if the occupant M runs the vehicle without wearing any seat belt, the two-point seat belt 20 is worn, so the vehicle runs without the occupant M being restrained. Can be prevented. In this case, the occupant M may be warned that the three-point seat belt 10 is not worn.

(Embodiment 3)
In the third embodiment, the two-point retractor 21 of the two-point seat belt 20 is set at a position different from those in the first and second embodiments. FIG. 13 is a front view showing the configuration of the seat belt device 100 according to the third embodiment. Since the three-point seat belt 10 is the same as that of the first embodiment, the same reference numerals are given and description thereof is omitted. About the two-point seat belt 20, the same code | symbol is attached | subjected about the structure similar to Embodiment 1. FIG.

  The two-point seat belt 20 includes a two-point side anchor 26, a two-point side belt (webbing) 22, a two-point side through 233, and a two-point side retractor 21.

  The two-point anchor 26 is shared with the three-point anchor 15 of the three-point seat belt 10. The two-point anchor 26 is provided on the frame on the side of the seat cushion 1 on the vehicle center side. The two-point anchor 26 fixes one end of the two-point belt 22. The two-point side retractor 21 fixes the other end of the two-point side belt 22 inside. A two-point side through 233 (window-side fixing portion) is provided in the middle of the two-point side belt 22. The two-point side through 233 is provided with a wide hole, and the two-point side belt 22 is passed through the hole. The two-point side through 233 is movable by being guided by a guide rail 232 provided so that at least a part thereof is along the side roof 3 at the upper part of the window. Since the moving mechanism 23 of the two-point side through 233 can be realized by a known technique as in the first embodiment, the description thereof is omitted. In the third embodiment, the moving mechanism 23 of the two-point seat belt 20 includes a motor that moves the two-point side through 233, the guide rail 232, and the two-point side through 233.

  The two-point seat belt 20 shown in FIG. 13 is in a state where the two-point side belt 22 does not restrain the occupant M. In this case, the two-point side through 233 is located at one end of the guide rail 232 on the vehicle front side.

  FIG. 14 is a front view showing the configuration of the seat belt device 100 according to the third embodiment. FIG. 15 is a side view showing a configuration when seat belt device 100 according to Embodiment 3 is viewed from the vehicle center side. Since the method of attaching the three-point seat belt 10 of the third embodiment is the same as that of the first embodiment, the description thereof is omitted. Here, with reference to FIGS. 14 and 15, how the two-point seat belt 20 is attached to the occupant M after the three-point seat belt 10 is attached will be described.

  When the three-point buckle switch 162 of the three-point buckle 16 detects that the occupant M has attached the three-point seat belt 10, the two-point side through 233 of the two-point seat belt 20 extends along the guide rail 232. Move from the front of the vehicle to the rear of the vehicle. When the movement of the two-point side through 233 toward the rear of the vehicle is completed, the position of the two-point side through 233 is fixed by the lock mechanism provided on the guide rail 232. Since the structure of the fixing means for the two-point side through 233 can be realized by a known technique as in the first embodiment, the description thereof is omitted.

  Before the two-point seat belt 20 is attached, the two-point side through 233 is in a position in front of the seat. The two-point side belt 22 is wound around the two-point side retractor 21 so that the distance from the two-point side anchor 26 to the two-point side retractor 21 via the two-point side through 233 is minimized. Has been taken. After the occupant M wears the three-point seat belt 10, the two-point side through 233 moves along the guide rail 232 to the upper rear part of the seat cushion 1. As described above, the two-point side belt 22 intersects from the upper left shoulder of the occupant M toward the right waist to form the shoulder belt portion 7. The shoulder belt portion 7 restrains the occupant M by the two points of the two-point side anchor 26 and the two-point side through 233. In this case, the two-point side through 233 fixes the shoulder belt portion 7 by frictional force.

  Note that one end of the guide rail 232 is in the vehicle front side direction of the side roof 3 or a predetermined position of the A pillar (front pillar). The other end of the guide rail 232 is in the vehicle rear side direction of the side roof 3 or a predetermined position of the B pillar (center pillar) 4. The two-point side retractor 21 is fixed inside the B pillar 4.

  In the third embodiment, the operation control of the two-point seat belt 20 and the processing procedure of the operation control are the same as those in the first embodiment, and a description thereof will be omitted. In the third embodiment, the same operation control of the two-point seat belt 20 as in the second embodiment may be adopted.

  The seat belt device 100 of the third embodiment has the following effects in addition to the effects of the first and second embodiments. Since the two-point anchor 26 is shared with the three-point anchor 15, the number of parts can be reduced. Since the two-point retractor 21 is installed inside the B pillar 4, the number of parts installed around the seat is reduced, and the environment inside the vehicle compartment is improved. Moreover, it becomes difficult for dust or dust to enter the two-point side retractor 21, and the probability of failure due to accumulation of dust or dust can be reduced.

(Embodiment 4)
In the fourth embodiment, there are three two-point seat belts 20. The conventional two-point seat belt 20 has two states, a released state and a mounted state, but further adds a standby state. The difference between the fourth embodiment and the first embodiment is mainly the operation control of the two-point seat belt 20. Since the configuration of the three-point seat belt 10 and the two-point seat belt 20 of the fourth embodiment is the same as that of the first embodiment, the following description will mainly describe control that is different from the first embodiment. . In the fourth embodiment, the seat belt device 100 is used for a seat on the right side in the traveling direction of the vehicle. Therefore, the seat belt device 100 of the first embodiment is symmetrical with a line connecting the front and rear directions of the vehicle. It is line symmetric as an axis.

  First, the background for adding the standby state will be described. Although the occupant M is obliged to wear a seat belt when the vehicle is traveling, it is only on public roads, and is not obliged to wear a seat belt in a non-public road such as a parking lot. For this reason, there is a possibility that the occupant M does not wear the seat belt in the parking lot because it is easy to check the surroundings and to easily check the back during back travel.

  On the other hand, when the occupant M gets into the vehicle and travels without wearing the seat belt, in the above-described seat belt device 100, the two-point seat belt 20 is in the released state until the specified speed is reached. Further, when entering the parking lot from a public road and releasing the seat belt, when the three-point seat belt 10 is released, the two-point seat belt 20 is released. Thereafter, when the vehicle reaches the specified speed, the two-point seat belt 20 is put on.

  Here, the positional relationship between the steering and the two-point side belt 22 when the two-point seat belt 20 is in the released state will be described. FIG. 16 is an explanatory diagram showing the position of the two-point side belt 22. FIG. 16 is a view seen from the roof side. 17 and 18 are explanatory views showing the positional relationship between the steering wheel S and the two-point side belt 22. FIG. 17 is a view seen from the viewpoint of the passenger M. FIG. 18 is a view as seen from the vehicle center side. The two-point side belt 22 crosses the steering wheel S so as to pass through the clock 7 o'clock and 2 o'clock direction of the steering wheel S. For this reason, for example, when the occupant M tries to turn the left hand HL in the 6 o'clock direction, the two-point belt 22 becomes an obstacle, and the steering S is difficult to operate. Therefore, if the prescribed speed for shifting the above-described two-point seat belt 20 to the wearing state is set to a very small value, the problem of the steering S operation is solved, but it is against the occupant's intention not to wear the seat belt. The operation of the two-point seat belt 20 makes the passenger M feel uncomfortable. Therefore, a standby state is provided.

  19 and 20 are explanatory views showing a standby state of the two-point seat belt 20. FIG. 19 is a view when the occupant M is looked down from the roof side. FIG. 20 is a view when the door side is viewed from the vehicle center side. The release position P1 shown in FIGS. 19 and 20 is a position where the two-point side shoulder anchor 231 is stopped when the two-point seat belt 20 is in the release state. The attachment position P2 is a position where the two-point side shoulder anchor 231 is stopped when the two-point seat belt 20 is in the attachment state. With the addition of the standby state, a standby position P3 is provided between the release position P1 and the mounting position P2, as shown in FIGS. The standby position P3 is a position where the two-point side shoulder anchor 231 is stopped when the two-point seat belt 20 is in the standby state. The standby position P3 is a position where the two-point belt 22 moves away from the vicinity of the steering S and passes between the elbow of one arm of the occupant M and the elbow of the other arm. Then, the optimal position is determined from the traveling state of the vehicle and the state of the three-point buckle 16 of the three-point seat belt 10, and the two-point belt 22 is moved.

  Next, the operation of the two-point seat belt 20 in the present embodiment will be described. FIG. 21 is a state transition diagram of the two-point seat belt 20. “Stop”, “low speed”, and “medium speed” described in the event that causes the state transition are the traveling state of the vehicle. “Stop” is a state in which the vehicle is stopped. “Low speed” is a state in which the vehicle speed is less than a specified speed (for example, 20 km / h). “Medium speed” is a state in which the vehicle speed is equal to or higher than a specified speed. In FIG. 21, the change in the running state is an event that causes the state transition. The specified speed is set based on the speed at which a warning that the seat belt is not worn is output. Further, whether or not the vehicle is at a medium speed may be determined using the presence or absence of an alarm indicating that the seat belt is not worn, instead of the speed.

  When the two-point seat belt 20 is in the released state, the two-point seat belt 20 transitions to the standby state when the vehicle changes from the stopped state to the low speed state. When the vehicle changes to the stopped state in the standby state, the two-point seat belt 20 changes to the released state. When the two-point seat belt 20 is in the standby state, the two-point seat belt 20 transitions to the wearing state when the vehicle changes from the low speed state to the medium speed state. When the three-point tongue 14 of the three-point seat belt 10 is released in the mounted state, the two-point seat belt 20 transitions to a standby state.

  When the two-point seat belt 20 is in the released state and the three-point tongue 14 is engaged, the state transitions to the mounted state. When the three-point tongue 14 is released in the mounted state and the vehicle changes to the stopped state, the two-point seat belt 20 transitions to the released state. In FIG. 21, it is described that the release state and the attachment state transition directly, but when transitioning from release to attachment, and when transitioning from attachment to release, both pass through an intermediate transition state.

  FIG. 22 is an explanatory diagram showing a hardware configuration related to the two-point seat belt 20. The ECU 8 controls the two-point seat belt 20. The ECU 8 includes a CPU (Central Processing Unit) 81, a ROM (Read Only Memory) 82, a RAM 83, an I / O 84, and a motor driver 85. The CPU 81 controls the two-point seat belt 20 according to a control program stored in the ROM 82. The RAM 83 temporarily stores data generated when the CPU 81 executes the program. The I / O 84 accepts signals from sensors and other ECUs. The motor driver 85 supplies a driving current to the moving motor M1 in accordance with an instruction from the CPU 81. The moving motor M <b> 1 is a motor used when moving the two-point side shoulder anchor 231.

  The CPU 81 receives a signal for the operation of the two-point seat belt 20 via the I / O 84. The gear position signal shown in FIG. 22 is a signal indicating the position of the engine gear of the vehicle. The ignition signal is a signal indicating whether the ignition (ignition device) is ON or OFF. Based on the ignition signal, it is possible to determine whether the vehicle engine is running or stopped. The speed signal is a signal indicating the speed of the vehicle. The buckle switch signal is a signal indicating whether the three-point tongue 14 is in an engaged state or a released state. The shoulder anchor position signal is a signal indicating the position of the two-point side shoulder anchor 231.

  FIG. 23 is a flowchart showing a control processing procedure for the two-point seat belt 20. The CPU 81 of the ECU 8 determines whether or not the two-point side shoulder anchor 231 is in the release position (step S11). When the CPU 81 determines that the two-point side shoulder anchor 231 is in the release position (YES in step S11), the CPU 81 performs a release state process (step S12). When the CPU 81 determines that the two-point side shoulder anchor 231 is not in the release position (NO in step S11), the CPU 81 determines whether or not the two-point side shoulder anchor 231 is in the mounting position (step S13). When the CPU 81 determines that the two-point shoulder anchor 231 is in the mounting position (YES in step S13), the CPU 81 performs a mounting state process (step S14). When the CPU 81 determines that the two-point side shoulder anchor 231 is not in the mounting position (NO in step S13), the CPU 81 performs a standby state process (step S15).

  FIG. 24 is a flowchart showing the processing procedure of the release state processing. The CPU 81 determines whether or not the three-point tongue 14 is engaged (step S21). When the CPU 81 determines that the three-point tongue 14 is engaged (YES in step S21), the CPU 81 shifts the two-point seat belt 20 to the wearing state (step S22). That is, the moving motor M1 is driven to move the two-point side shoulder anchor 231 to the mounting position. When the CPU 81 determines that the three-point tongue 14 is not engaged (NO in step S21), the CPU 81 determines whether or not the traveling state is a low speed (step S23). When the CPU 81 determines that the traveling state is low speed (YES in step S23), the CPU 81 causes the two-point seat belt 20 to transition to the standby state (step S24). That is, the movement motor M1 is driven to move the two-point side shoulder anchor 231 to the standby position. The CPU 81 returns the process to the caller. When determining that the traveling state is not low speed (NO in step S23), the CPU 81 determines whether or not the traveling state is medium speed (step S25). If the CPU 81 determines that the traveling state is medium speed (YES in step S25), the CPU 81 causes the two-point seat belt 20 to transition to the wearing state (step S22). The CPU 81 returns the process to the caller. If the CPU 81 determines that the running state is not medium speed (NO in step S25), the CPU 81 returns the process to the caller because there is no need for state transition.

  FIG. 25 is a flowchart showing the procedure of the wearing state process. The CPU 81 determines whether or not the three-point tongue 14 has been released (step S31). If the CPU 81 determines that the three-point tongue 14 has not been released (NO in step S31), the determination is repeated. When the CPU 81 determines that the three-point tongue 14 is released (YES in step S31), the CPU 81 determines whether or not the traveling state is a stop (step S32). When the CPU 81 determines that the traveling state is a stop (YES in step S32), the CPU 81 causes the two-point seat belt 20 to transition to the released state (step S33). That is, the moving motor M1 is driven to move the two-point side shoulder anchor 231 to the release position. The CPU 81 returns the process to the caller. When the CPU 81 determines that the traveling state is not stopped (NO in step S32), the CPU 81 determines whether or not the traveling state is a low speed (step S34). When the CPU 81 determines that the traveling state is low speed (YES in step S34), the CPU 81 shifts the two-point seat belt 20 to the standby state (step S35). That is, the movement motor M1 is driven to move the two-point side shoulder anchor 231 to the standby position. The CPU 81 returns the process to the caller. If the CPU 81 determines that the running state is not low speed (NO in step S34), the CPU 81 returns the process to the caller because there is no need for state transition.

  FIG. 26 is a flowchart showing a processing procedure of standby state processing. The CPU 81 determines whether or not the three-point tongue 14 is engaged (step S41). If the CPU 81 determines that the three-point tongue 14 is engaged (YES in step S41), the CPU 81 shifts the two-point seat belt 20 to the wearing state (step S42). That is, the moving motor M1 is driven to move the two-point side shoulder anchor 231 to the mounting position. The CPU 81 returns the process to the caller. When the CPU 81 determines that the three-point tongue 14 is not engaged (NO in step S41), the CPU 81 determines whether or not the traveling state is medium speed (step S43). If the CPU 81 determines that the traveling state is medium speed (YES in step S43), the CPU 81 shifts the two-point seat belt 20 to the wearing state (step S42). That is, the moving motor M1 is driven to move the two-point side shoulder anchor 231 to the mounting position. The CPU 81 returns the process to the caller. If the CPU 81 determines that the traveling state is not medium speed (NO in step S43), the CPU 81 determines whether or not the traveling state is a stop (step S44). If the CPU 81 determines that the traveling state is a stop (YES in step S44), the CPU 81 shifts the two-point seat belt 20 to the released state (step S45). That is, the moving motor M1 is driven to move the two-point side shoulder anchor 231 to the release position. The CPU 81 returns the process to the caller. If the CPU 81 determines that the running state is not a stop (NO in step S44), the CPU 81 returns the process to the caller because there is no need for state transition.

  FIG. 27 is a flowchart showing the procedure of the running state determination process. The CPU 81 resets all the stop counters, medium speed counters, and low speed counters to 0 (step S51). The CPU 81 determines whether the gear position is parking or the ignition is OFF (step S52). If the CPU 81 determines that the gear position is parking or the ignition is OFF (YES in step S52), the CPU 81 performs the following process. Increase the stop counter by one. The medium speed counter and the low speed counter are reset to 0 (step S53). If the CPU 81 determines that the gear position is not parking and the ignition is not OFF (NO in step S52), the CPU 81 determines whether or not the vehicle speed is equal to or higher than the medium speed (specified speed) (step S54). When the CPU 81 determines that the vehicle speed is equal to or higher than the medium speed (YES in step S54), the CPU 81 performs the following process. Increase the medium speed counter by one. The low speed counter and the stop counter are reset to 0 (step S55). When the CPU 81 determines that the vehicle speed is not equal to or higher than the medium speed (NO in step S54), the CPU 81 increments the low speed counter by 1, and resets the stop counter and the medium speed counter to 0 (step S56). After step S53, step S55, and step S56, the CPU 81 determines whether or not the counter has a value equal to or greater than the threshold (step S57). If the CPU 81 determines that the counter has a value greater than or equal to the threshold (YES in step S57), the CPU 81 determines that the state corresponding to the counter having a value greater than or equal to the threshold is the running state (step S58). The CPU 81 returns the process to the caller. If the CPU 81 determines that there is no counter equal to or greater than the threshold value (NO in step S57), the process returns to step S52. It should be noted that counters corresponding to each of stopping, low speed, and medium speed are provided, and when the counter value exceeds the threshold value, the state is decided to be repeated between stopping and starting like a garage This is for avoiding frequent operation of the two-point seat belt 20 in such a case.

  The running state determination process shown in FIG. 27 is executed every predetermined time by an interval timer. The running state that is the determination result is stored as a global variable in the RAM 83 and is referred to in the above-described release state process, wearing state process, and standby state process.

  Alternatively, the running state determination process shown in FIG. 27 may be executed as necessary in the above-described release state process, wearing state process, and standby state process. In this case, the running state determination process is executed before step S23 in the release state process, before step S32 in the attachment state process, and before step S43 in the standby state process.

  As described above, the seat belt device 100 according to the fourth embodiment provides a standby state as the state of the two-point seat belt 20, so that even if the occupant does not wear the two-point seat belt 20. The two-point side belt 22 does not interfere with the steering operation, and the operability can be ensured. In addition, since the state change of the two-point seat belt 20 is performed according to the wearing state of the three-point seat belt 10 and the traveling speed of the vehicle, belt control can be performed in accordance with the occupant's will, and the occupant feels uncomfortable with the belt operation It becomes possible to reduce.

  In the fourth embodiment, the two-point seat belt device may be configured similarly to the third embodiment (see FIG. 13). That is, the two-point anchor 26 is shared with the three-point anchor 15 of the three-point seat belt 10. The two-point side shoulder anchor 231 is a through (two-point side through 233). The two-point retractor 21 is arranged on the window side.

(Embodiment 5)
In the fifth embodiment, a standby state is added to the two-point seat belt 20 as in the fourth embodiment. Since the configuration of the three-point seat belt 10 and the two-point seat belt 20 of the fifth embodiment is the same as that of the fourth embodiment, the following description will mainly describe differences from the fourth embodiment.

  The significance of providing a standby state in the fifth embodiment will be described. In the above-described seat belt device 100, when the three-point tongue 14 of the three-point seat belt 10 is engaged with the three-point buckle 16, the two-point belt 22 moves to the mounting position immediately after that. In this case, it is considered that the occupant M engages the three-point tongue 14 while looking at the three-point buckle 16. At this time, since the occupant M is bent to the three-point side buckle 16 side, the head of the occupant M is located on the movement line of the two-point side belt 22 and may interfere with the two-point side belt 22. .

  In the fifth embodiment, a standby state is provided as in the fourth embodiment. When in the standby state, the two-point shoulder anchor 231 of the two-point belt 22 is in the standby position P3 (see FIGS. 19 and 20). The standby position P3 is a position where the two-point side belt 22 moves away from the vicinity of the steering wheel S and passes between the elbow of one arm and the other arm of the occupant M, as in the fourth embodiment.

  Examples of the method for stopping the two-point side shoulder anchor 231 at the standby position P3 include the following. A switch is provided at the position of the guide rail 232 corresponding to the standby position P3. When the switch is turned on by the two-point side shoulder anchor 231, it is detected that the standby position P3 has been reached. A rotation sensor for detecting the rotational motion of the moving motor M1 for moving the two-point side shoulder anchor 231 is provided, and it is estimated that the two-point side shoulder anchor 231 has reached the standby position P3 based on the rotational speed of the moving motor M1. . From the driving time and driving voltage / current of the moving motor M1, it is estimated that the two-point side shoulder anchor 231 has reached the standby position P3.

  Next, a control process for the two-point seat belt 20 in the present embodiment will be described. FIG. 28 is a flowchart showing a procedure of control processing of the two-point sieve belt 20. The CPU 81 of the ECU 8 determines whether or not the three-point side tongue 14 of the three-point seat belt 10 is engaged with the three-point side buckle 16 (step S61). If it is determined that the CPU 81 is engaged (YES in step S61), the two-point seat belt 20 is shifted to the standby state. That is, the two-point side shoulder anchor 231 is moved to the standby position P3 (step S62). The CPU 81 determines whether or not the vehicle is running (step S63). This determination will be described later. When the CPU 81 determines that the vehicle is not in the traveling state (NO in step S63), the CPU 81 repeatedly executes step S63. When the CPU 81 determines that the vehicle is in the traveling state (YES in step S63), the CPU 81 shifts the two-point seat belt 20 to the wearing state (step S64). That is, the CPU 81 moves the two-point side shoulder anchor 231 to the mounting position P2. The CPU 81 ends the process. The process shown in FIG. 28 is repeatedly executed.

  When the CPU 81 determines that the three-point tongue 14 is not engaged with the three-point buckle 16 (NO in step S61), the CPU 81 shifts the two-point seat belt 20 to the released state (step S65). That is, the CPU 81 moves the two-point side shoulder anchor 231 to the release position P1. The CPU 81 returns the process to step S61.

  FIG. 29 is a flowchart illustrating the processing procedure of the traveling state determination processing. FIG. 29 shows the processing procedure of step S63 described above. CPU81 determines whether a gear position is parking (step S71). If the CPU 81 determines that the gear position is parking (YES in step S71), the CPU 81 determines that the vehicle is in a stopped state (step S72) and ends the process.

  When determining that the gear position is not parking (NO in step S71), the CPU 81 determines whether or not the vehicle speed is 20 km / h or more (step S73). When the CPU 81 determines that the vehicle speed is 20 km / h or more (YES in step S73), the CPU 81 determines that the vehicle is in a traveling state (step S74) and ends the process. When the CPU 81 determines that the vehicle speed is less than 20 km / h (NO in step S73), the CPU 81 determines that the vehicle is in a stopped state (step S72) and ends the process.

  As described above, the seat belt device 100 according to the fourth embodiment can prevent interference with the head of the occupant M by providing a standby state as the state of the two-point seat belt 20. As a result, the comfort of the seat belt device 100 is improved.

(Embodiment 6)
The sixth embodiment relates to a configuration that makes it easier to attach the three-point seat belt 10. FIG. 30 is a front view showing the configuration of the seat belt device 100 according to the sixth embodiment. FIG. 31 is a partially enlarged view of the vicinity of the lifting mechanism 18. In the configuration of the seat belt device 100 according to the sixth embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In the following description, differences from the first embodiment will be mainly described.

  In the sixth embodiment, the three-point buckle 16 of the three-point seat belt 10 is fixed to the lifting mechanism 18. The elevating mechanism 18 includes a rack 18a, a pinion 18b, and a rotary motor 18c. The rotation motor 18c is fixed to the side of the seat cushion 1 at a predetermined distance from the floor 31. The rotation shaft of the rotary motor 18c is arranged along the front-rear direction of the vehicle. A pinion 18b is attached to the shaft of the rotary motor 18c. The pinion 18b meshes with the rack 18a. By rotating the pinion 18b by the rotation motor 18c, the rack 18a moves up and down. Accordingly, the three-point buckle 16 is also configured to move up and down. The elevating mechanism 18 is controlled by the control unit 71. In FIGS. 30 and 31, the internal structure of the lifting mechanism 18 is visible. However, the rack 18a, the pinion 18b, and the rotary motor 18c are covered with a casing in a form that does not hinder the operation. Yes. Note that the lifting mechanism is not limited to the above-described configuration. The three-point side buckle 16 may be moved up and down by a ball screw whose axial direction is vertical. A cam may be attached to a ball screw having a horizontal axial direction, and the three-point buckle 16 may be moved up and down by the cam.

  The seat cushion 1 is provided with a seating detection sensor 1a for detecting the seating of the occupant M. The seating detection sensor 1 a is connected to the control unit 71. When the seating detection sensor 1a detects the seating of the occupant M, the seating detection sensor 1a notifies the control unit 71 of the seating. The seating detection sensor 1a may be provided not only in the seat cushion 1 but also in the seat back 2. Further, only the seat back 2 may include the seating detection sensor 1a.

  The three-point buckle 16 includes a light emitting element 16a. The light emitting element 16a is, for example, an LED (Light Emitting Diode) or a small light bulb. The light emitted from the light emitting element 16a is visible from the insertion opening into which the three-point tongue 14 is inserted. Whether the light emitting element 16a emits light or extinguishes is controlled by the control unit 71.

  Next, a processing procedure for operation control of the three-point seat belt 10 will be described. FIG. 32 is a flowchart showing a processing procedure for operation control of the three-point seat belt 10. The control unit 71 determines whether or not the occupant M is seated on the seat based on the output of the seating detection sensor 1a (step S101). When the control unit 71 does not detect the seating (NO in step S101), the control unit 71 repeatedly executes step S101. When the seating is detected (YES in step S101), the controller 71 determines whether or not the three-point tongue 14 is engaged with the three-point buckle 16 (step S102). When it is determined that the three-point tongue 14 is not engaged with the three-point buckle 16 (NO in step S102), the control unit 71 turns on the light emitting element 16a built in the three-point buckle 16 ( Step S103). The control unit 71 drives the lifting mechanism 18 to raise the three-point buckle 16 (step S104). The control unit 71 returns the process to step S101.

  When it is determined that the three-point tongue 14 is engaged with the three-point side buckle 16 (YES in Step S102), the control unit 71 turns off the light emitting element 16a built in the three-point side buckle 16 ( Step S105). The controller 71 drives the lifting mechanism 18 to lower the three-point buckle 16 (step S106). The control unit 71 ends the process.

  In the present embodiment, when the seating of the occupant M is detected, the light emitting element 16a built in the three-point buckle 16 is turned on and the three-point buckle 16 is raised. As a result, the passenger M can easily engage the three-point side tongue 14 with the three-point side buckle 16. The operation control of the three-point seat belt 10 may not be performed when the seating sensor detects the seating, but may be detected when the vehicle door is closed.

  In the first to third embodiments and the sixth embodiment, the seatbelt device 100 is described on the assumption that the seatbelt device 100 is used for a seat on the left side in the traveling direction of the vehicle. It is also possible to use it. In that case, each configuration of the seat belt device 100 may be arranged symmetrically with respect to the vehicle center. Further, the arrangement of the three-point side tongue 14 and the three-point side buckle 16 of the three-point seat belt 10 may be reversed. That is, a buckle may be provided in the middle of the three-point side belt 12, and a tongue may be provided on the side frame of the seat cushion 1 or the floor portion 31 of the passenger compartment 30. In this case, a detection switch for determining whether or not the buckle is engaged may be provided on the tongue side. Similarly, the seat belt device 100 according to the fourth and fifth embodiments can be used for the left seat in the traveling direction of the vehicle.

The technical features (components) described in each embodiment can be combined with each other, and new technical features can be formed by combining them.
The embodiments disclosed herein are illustrative in all respects and should not be considered as restrictive. The scope of the present invention is defined not by the above-mentioned meaning but by the scope of the claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of the claims.

DESCRIPTION OF SYMBOLS 1 Seat cushion 1a Seating detection sensor 2 Seat back 3 Side roof 4 B pillar 5 Lap belt part 6, 7 Shoulder belt part 10 3-point seat belt 11 3-point side retractor 12 3-point side belt (webbing)
13 3-point guide section (sending section)
14 3-point tongue (engaged part)
15 3 point side anchor (2nd center side fixed part)
16 3-point buckle (engagement part)
161 Release button 162 3-point buckle switch (detector)
16a Light-emitting element 17 Three-point side buckle plate 171 Connecting portion 172 Fixed portion 18 Lifting mechanism 18a Rack 18b Pinion 18c Rotating motor 20 Two-point seat belt 21 Two-point side retractor (first central-side fixed portion)
22 2-point belt (webbing)
23 moving mechanism 231 2-point side shoulder anchor (window side fixing part)
232 Guide rail (guide section)
233 2 point side through (window side fixed part)
DESCRIPTION OF SYMBOLS 100 Seatbelt apparatus 71 Control part 72 Two-point side shoulder anchor moving part 73 Two-point side shoulder anchor position fixing part 74 Two-point side shoulder anchor position detection part (2nd detection part)
75 RAM
8 ECU
81 CPU
82 ROM
83 RAM
84 I / O
85 Motor driver M1 Motor for movement M Crew S Steering

Claims (20)

In a vehicle seat belt apparatus including a two-point seat belt and a three-point seat belt,
The two-point seat belt is
Above the window side of the sheet, one end or midway of the webbing is fixed, and a window side fixing part capable of moving between the front side position and the rear side position of the sheet;
Fixing the other end of the webbing, and having a first center side fixing portion located on a side portion of the seat on the vehicle center side,
The three-point seat belt is
A delivery section for sending out webbing from the upper part of the vehicle center side of the seat;
An engaging portion provided on a side portion of the sheet on the window side;
An engaged portion that has an insertion hole through which the webbing is inserted and is engaged and fixed to the engaging portion;
A second center side fixing portion that is provided on a side portion of the seat on the vehicle center side and fixes one end of the webbing;
The engagement portion has a detection portion that detects engagement of the engaged portion,
When the detection unit detects engagement of the engaged portion indicating attachment of the three-point seat belt, the two-point seat belt moves the window side fixing portion from the front position to the rear position. A seat belt device comprising a moving mechanism. A second detection unit for detecting that the window side fixing unit has arrived at a predetermined position between the seat back side position from the side of the seat back;
The seat belt device according to claim 1, further comprising: a restraining portion that restrains movement of the window side fixing portion when the second detection portion detects that the predetermined position has been reached. When the detection unit detects disengagement of the engaged portion, the detection unit includes a release mechanism that releases the restraint of the movement of the window-side fixing unit and moves the window-side fixing unit to the front side position. The seat belt device according to claim 2. The seat belt device according to any one of claims 1 to 3, wherein the first center-side fixing portion is a retractor. A retractor on the lower side of the window-side fixing portion;
The seat belt device according to any one of claims 1 to 4, wherein the first center-side fixing portion is integrated with the second center-side fixing portion. The two-point seat belt has a guide part for guiding the movement of the window side fixing part,
The seat according to any one of claims 1 to 5, wherein at least a part of the guide portion is provided so as to be along a skeleton member that is located in an upper portion of the window and extends in the front-rear direction of the vehicle. Belt device. The seat belt device according to any one of claims 1 to 6, wherein the engaging portion is a buckle (or tongue), and the engaged portion is a tongue (or buckle). An acquisition unit for acquiring the traveling speed of the vehicle;
When the acquired traveling speed is a positive value less than a predetermined value, and the detection unit does not detect the engagement of the engaged portion, the moving mechanism moves the window side fixing portion to the front position and the rear side. The seat belt device according to claim 1, wherein the seat belt device is moved to a standby position located between the positions. When the window-side fixing portion is at the standby position and the traveling speed acquired by the acquisition unit is equal to or higher than the predetermined value, the moving mechanism moves the window-side fixing portion between the standby position and the rear position. The seatbelt device according to claim 8, wherein the seatbelt device is moved to the position. A release mechanism for moving the window side fixing part to the front side position;
When the window side fixing portion is at the predetermined position, the detection unit detects the disengagement of the engaged portion, and the traveling speed acquired by the acquisition unit is less than a predetermined value, the release mechanism The seat belt device according to claim 8 or 9, wherein the window side fixing portion is moved to the standby position. When the window side fixing part is in the standby position and the traveling speed acquired by the acquisition part is 0, the release mechanism moves the window side fixing part to the front side position. The seatbelt apparatus of any one of Claims 8-10. The seat belt device according to any one of claims 8 to 11, wherein the first center-side fixing portion is a retractor. A retractor on the lower side of the window-side fixing portion;
The seat belt device according to any one of claims 8 to 11, wherein the first center side fixing portion is integrated with the second center side fixing portion. When the detection unit detects the engagement of the engaged portion, the moving mechanism is configured to move the window-side fixing unit to a standby position located between the front position and the rear position. The seat belt device according to claim 1. A state acquisition unit for acquiring a vehicle state indicating whether the vehicle is running or stopped;
When the acquired vehicle state is a traveling state, the moving mechanism is configured to move the window side fixing portion from the standby position to a predetermined position between the rear side positions. The seat belt device according to the description. The moving mechanism is configured to move the window side fixing portion to the front side position when the detecting portion does not detect the engagement of the engaged portion. The seat belt device according to claim 15. A seating receiving unit for receiving a notification that a passenger is seated on the seat;
An elevating mechanism for raising or lowering the engaging portion;
When the notification that the seating receiving unit is seated is received and the detection unit does not detect the engagement of the engaged portion, the elevating mechanism is configured to raise the engagement unit. The seat belt device according to claim 1, wherein The engaging portion has a light emitting element,
A light emission control unit for controlling light emission of the light emitting element;
When the notification that the seating receiving unit is seated is received and the detection unit does not detect the engagement of the engaged portion, the light emission control unit emits the light emitting element. 18. The seat belt device according to claim 17, wherein When the notification that the seating receiving unit is seated is received and the detection unit detects the engagement of the engaged portion, the lifting mechanism is configured to lower the engagement unit. The seatbelt device according to claim 17 or 18, characterized in that When the notification that the seating receiving unit is seated is received and the detection unit detects the engagement of the engaged portion, the light emission control unit turns off the light emitting element. The seat belt device according to claim 18 or 19, characterized in.

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