JPS6099743A - Emergency lock type seat belt retractor using auto-lock type seat belt retractor and said seat belt retractor - Google Patents

Abstract

PURPOSE:To make a lockup of an auxiliary seat securable to a regular seat, by making an emergency lock type seat belt retractor and an auto-lock type seat belt retractor into combination. CONSTITUTION:In case of being used for an auto-lock type seat belt retractor, an expent of nearly 90% of a seat belt in its overall longitudinal direction is rewound. With this rewinding, a carrier 13 locked to a main shaft 2 rotates a turn in a rewinding direction of the seat belt by means of a planetary gear 12 and an internal gear of a cover 16 installed in the outside of the former. With rotation in this carrier 13, an actuator 14 rotates whereby a spring 21 pivotally attached to this actuator forcibly presses a pin 14' of the actuator 14 and further pushes a main pawl 17 to a ratchet wheel 6 under pressure via a retainer 19. Under this condition, the main pawl 17 is able to lock the ratchet wheel 16 in the drawing direction whilte it is also able to wind up the seat belt at will in the take-up direction.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an emergency lock type notebook belt retractor with an automatic lock, which is a combination of an emergency lock two notebook belt tractor and an automatic lock two sorting belt retractor.

Conventional emergency locking seatbelt retractors are designed to respond to the vehicle body and/or reduce the belt retraction speed when the vehicle body experiences acceleration or deceleration exceeding the normal speed due to a collision, etc. while the occupant is seated and wearing the seatbelt retractor. The seatbelt is locked by the action of the sensor, securing the occupant safely in the seat. However, for example, if a child's auxiliary chair is installed in the seat and this is fixed to the seat, the seatbelt is locked and the seat belt is locked. In the normal acceleration/deceleration range, the rafters receive only the force of the seatbelt winding spring, which causes sagging due to vibrations, etc. In the event of an emergency, the auxiliary chair will be fixed to the vehicle seat. Therefore, the safety of the child seated in the auxiliary chair could not be ensured.

In addition, there are always-fixed sorting belts that adjust the length of the seatbelt near the buckle, and so-called automatic locking retractors that fix the seatbelt in the pull-out direction by unwinding the sorting belt a predetermined amount and winding it up when worn. is also well known, and when using this to fix the above-mentioned auxiliary chair to the seat of the car body, the safety of the auxiliary chair, that is, the child seated in this chair, can be ensured, but when the auxiliary chair is fastened several times, the safety of the seat belt is It is necessary to adjust the length each time,
In practical terms, it is often not possible to secure the auxiliary chair with these types of seat belts (also, it is complicated to attach and detach the auxiliary chair from the vehicle seat, or it may restrict the occupant excessively). Therefore, these/-tuber retractors had drawbacks such as not being normally used.

The present invention provides an automatic locking seatbelt retractor that can be combined with a general-purpose emergency locking notebook belt retractor under normal circumstances, and which allows an auxiliary chair or the like to be arbitrarily installed on a vehicle seat; An object of the present invention is to provide an emergency locking seatbelt that uses a seatbelt retractor.

This problem is solved by the structure described in the claims. In the configuration described in claim (1),
Since it functions as an automatic locking seatbelt retractor by increasing the rewinding rate of the seat belt to 80% or more, it is easy to attach a vehicle body-sensitive locking device to the seatbelt retractor. In the configuration described in section 2).

When a passenger is seated in a seat and excessive acceleration occurs due to a collision, etc., the action of the inertia wheel that responds to the speed at which the sorting belt is pulled out engages the raw jaws (ratchets) and locks the reel rewind. When fixing the auxiliary chair to the seat with the seat belt, the seat belt can be biased by the spring by pulling out almost the entire amount of the sorting belt, so the seat belt cannot be pulled out. This has the advantage that the auxiliary chair is secured to the seat.

Next, the present invention will be explained in detail according to the illustrated embodiments.

The manual lock type emergency lock type notebook belt retractor according to the present invention shown in FIG.
The concentric holes (core a, 1.b) provided in A, ], B) are
A main shaft (2) to which a seat belt (not shown) is fixed is supported, and the main shaft (2) has a U-shaped frame (1) o.
(III) A mechanism 3) for winding the seat belt between the walls (xA, IB) is provided. One end of a winding spring (4) is connected to one end (2') of the main shaft (2),
The other end is fixed to the side wall (IA) via a forceps (5). A ratchet wheel (6) is fixed to the other end (2) of the main shaft. The outer side of the ratchet wheel (6) of the main shaft (2) is formed as a shaft pin (2"), and a tie plate (7) and a lock ring (8) are loosely fitted onto the shaft pin (2"). (8) and the tie plate (7) are connected by a nokune (9). The lock ring (8) is provided with internal teeth (8'), and the internal teeth (8') can be held in the claws (10) of a hook (10), which will be described later. and axle bin (2
") movably supports the hook (10) and the taker (
9) is fixed, and this retainer (9) and hook (10
) between the hook (10) and the inner teeth (8') of the lock ring (8).
/, 1 are provided. An inertia wheel (11) is loosely fitted on the axis pin (2'') on the outside of the hook (10), and the inertia wheel (11) engages with a pin (10'') provided upright on the hook (10). It is provided with a hole (11'). On the outside of the inertia wheel (11), a carrier (13) of a planetary gear (12) is loosely fitted to an axle pin (2''), and this carrier (13) is connected to a pin (1,
3') are erected in the axial direction. Also, this carrier (]
3) meshes with a sun gear (15) fixed to the sun gear (2"), and also meshes with an internal gear (not shown) provided in a cover case (16) surrounding the outside of the sun gear. This cover case (16) is fixed to the side wall (IB) of the U-shaped frame 1/-.Therefore, the shaft pin ( With the rotation of the sun gear (15) fixed at 2"), the carrier (13) rotates in the same direction of rotation at a speed greater than the rotation of the sun gear. This reduction ratio is the reel (
3) If the number of windings of the sorting belt is 7, the reel (3) will rotate the carrier (13) once in 6 turns.
It is sufficient to have a reduction ratio of about 1/6 that allows rotation, and therefore, other reduction mechanisms may be used instead of the planetary gear mechanism.

The main pawl (17) that can mesh with the ratchet teeth of the ratchet wheel (6) has a U-shaped 71/-m (
It is pivotally supported on a pin (18) fixed to the side wall (1B) of 1). A retainer pawl (19) is similarly supported on the outside of the main pawl (17) by a pin (18), and the retainer pawl (19) is connected to a hole (17) provided in the main pawl (17).
It has a pin (19') that fits into the hole. Therefore, the main pawl (17) is interlocked with the retainer paral (19). The boss portion (19') of the retainer pawl is opened at a predetermined angle (α) in the circumferential direction.
, 9') is formed from a spring plate, its outer cylindrical surface is in contact with the inner cylindrical surface of the boss part (19'), and the inner cylindrical surface is in contact with the pin (19').
8) is provided with a ring-shaped lever pawl (20) that is pivotally supported. Therefore, between Retainer Paul (19) and Trevor Paul (20), Retainer Paul (
In the opening range (α) of '19), the lever pawl (20) can freely rotate. 1/A lever (20') protrudes from the ring-shaped portion of the bar pawl (20), and this lever (20') engages with a recess (8'') provided near the outer periphery of the aforementioned lock ring (8). On the outside of the retainer pawl (19) is an actuator lever (1) having a pin (14') protruding into the opening (1 g).
4) is bearing on a pin (18), this actuator lever (14) projects radially and is connected to the carrier (13).
) has a sliding lever (14'') that cooperates with the cam (13''), and also breaks the 1/bar (14'') that pivots the spring (21) that is pivoted on the other cover (]6). This spring (
21) biases the main pawl (7) through the actuator (14) and the retainer pawl (19) to dissociate it from the ratchet wheel (6) when the amount of belt unwinding is small. cam(
When the actuator lever (14) is moved by the ratchet wheel (13"), the main pawl (17) is moved by the ratchet wheel (
6) Bias in the direction.

Next, the operation of the manual lock type emergency lock type sort belt retractor according to the present invention described above will be explained.

(1) During normal use (a) When the manual locking type emergency locking seatbelt retractor of the present invention is attached to a seated occupant, the seatbelt is used with approximately 70 to 80% retraction. . In this case, if there is no sudden acceleration or deceleration such as a collision, the seat belt should be retracted (4).
Due to the action of..., it is under tension in the winding direction so that it is wound around the IJ-rule (3).

Naka) If the belt is installed as shown in (b) and subjected to acceleration such as occurs when a vehicle collides with the belt, it will loosely fit into the shaft pin (2") of the main shaft (2). The inertia wheel (11), which is located behind the main shaft (2), lags behind the rotation of the main shaft (2), and as shown in Fig. 2a, the claw (10') of the hook (10) supported by the retainer (9) is rotated. Lock ring (8)
The rotation of the main shaft (2) is controlled by the retainer (9), the hook (1, 0) and the lock ring (8').
) through the recess (
transmitting the lever pawl (20) engaged with the
The lever pawl (20) rotates in the direction indicated by the arrow.

The rotary beam of this lever pawl (20) is the tener pawl (
19), and is transmitted from the retainer pawl (19) to the main pawl (17), causing the main pawl (17) to engage with the ratchet teeth of the ratchet wheel (6) fixed to the main shaft (2). Figure 2b), belt drawer,
That is, rewinding is locked. In this way, during general use, it functions as a webbing sense type emergency lock sort belt retractor.

(c) When the tension on the seatbelt is removed from this state,
Main Paul (17) Beam Taker (19) Boss (1)
The pins (14') of the actuator (14) that are in contact with the end faces of the nine openings (19II) are connected to the cover (1
The twin pawl (
17) from the ratchet wheel (6) (second
Figure C).

(2) When used as an automatic locking seatbelt retractor, the seatbelt is retracted by approximately 90% of its total length from the fully wound position shown in Figures 3 and 3a (Figure 3b). By this unwinding, the carrier (13) fixed to the shaft pin (2'') of the main shaft (2) is moved by the planetary gear (12) and the internal teeth (16') of the cover (16) provided on the outside thereof. , it makes almost one revolution in the direction of unwinding the seat belt (Figures 3 and 3b).This carrier (13
), the cam part (13”) rotates at the same time,
Rotate the leno<-(1,4″) of the actuator (14) in the direction of the arrow (A).Actuator (14)
When rotates, the nokune (21) pivoted on this rotates the pin (14) of the actuator (14) to the end (1) (1) of the opening of the boss (19') of the retainer pawl (19).
(Fig. 1) and press the twin pawl (17) in the direction of the ratchet wheel (6) via the retainer (J9) by spring force. In this case, the actuator (14)
The other lever (14") is located either to the left or right of the neutral position centered on the bearing pin (18) of the main pawl (17), which is an extension of the two shaft attachment points of the nokune (21). Therefore, the actuator (14) can be moved from the neutral position to either the left or the right by the action of the pivot point of the spring (21), that is, the spring action of the toggle mechanism. can occupy a position.

In this state, the main pawl is in contact with the teeth of the ratchet wheel (6) due to the action of the spring (21).
Lock the ratchet wheel (6) in the drawer direction,
The seat belt can be freely wound in the winding direction. Therefore, for example, when securing a child's auxiliary chair to the seat, first pull out about 90% of the total length of the seat belt, secure one end of it to the anchor buckle, and then reel (3) the loosened part of the seat belt. By winding it up, the seat belt is locked in the pull-out direction, that is, in the unwinding direction, so that the auxiliary chair can be reliably fixed to the vehicle seat.

To release this automatic locking mechanism, the entire seatbelt is wound up, and the rotation of this IJ brings the cam of the gear rear (13) into contact with the lever (14") of the actuator (14). When rotated in the opposite direction to the direction of arrow (A), the position of the shaft attachment point of the nokune (21) moves in the direction of removing the main cowl (17) from the neutral position (
So the main pawl (17) is the ratchet wheel (16)
), and the automatic locking mechanism is released.

In addition, the carrier (13) has a protrusion (
13" With the belt almost completely wound up, the main pawl (17) is attached to the ratchet wheel (6) in cooperation with the pin (1g///) of the retainer pawl (19).
Keep away from the person. By doing this, /-
A hook (
10) pawl (1,0”) and lock ring (8) internal teeth (
8') can prevent the main seal (17) from getting caught in the ratchet wheel (6) due to interference.

[Brief explanation of the drawing]

FIG. 1 is an exploded view of one embodiment of the present invention, and FIG.
Figures 20 to 20 show the states of the same embodiment from locking to release by the seatbelt sensor, Figures 3a to 3d show the states of the automatic locking mechanism up to locking, and Figure 3 shows the carrier of the automatic locking mechanism. The respective reduction mechanisms are shown below. Explanation of reference numbers in the drawings 1...U-shaped frame 2...Main shaft 3...Reel 4...Take-up spring 5e-〇 cover 6...Ratchet wheel 2''...Main spindle shaft pin 7 - Shaft tie plate 8 - Lock ring 9 - Retainer 10 - Hibiki Hook 11 - Flywheel 13 - Carrier 12 - Planetary gear 15 - Sun gear 16 - Cover 17 -・Main claw (twin bowl) 14-...Actuator 19.0 Retainer-Paul 21...Fist bias spring agent Hikaru Esaki Good agent Hikaru Esaki Figure 3 13 Figure 30 Figure 3b Figure 3b' Procedure Amendment 1 --- □,, -+,,, -, (Formula) 1933
February 2'l-u Commissioner of the Japan Patent Office Kazuo Wakasugi Indication of property 1989 Patent application No. 2θq Otsuq3 Name 1 Date of corrective order for embedding July 3, 2007 //1 Contents paper Figure 3 shows the carrier deceleration mechanism of the automatic locking mechanism. Explanation of reference numbers in the figure 1--U-shaped frame 2--Fist main shaft 3--ψ reel 4--Take-up spring 5--Cover 6--Ratchet wheel 2"--Axis of main shaft Pin 7...Tie plate 8...Lock ring 9...Retainer 10--7 11 River flywheel 1311/Set carrier 12...Planetary gear 15...Sun gear No. 3b-1 etc.

Claims (2)

[Claims] (1) A U-shaped frame, a seatbelt reel supported on the side wall of the U-shaped frame via a main shaft, and a ratchet fixed to the main shaft, in the engagement direction and disengagement direction in one direction. An automatic locking seat belt retractor comprising a spring that biases the seat belt, and an actuator that moves the main pawl in an engaging direction or a disengaging direction via a deceleration mechanism driven by a main shaft. (2) a U-shaped frame, a reel bearing on the frame via a main pawl, and a seat belt that is wound up by a winding nozzle biased on the reel in five directions;
a ratchet wheel identified on the main shaft; a lock ring loosely fitted on the main shaft on the outside of the ratchet wheel;
a cam that engages with the lock ring; a flywheel that engages with the cam and is loosely fitted to the main shaft; a carrier that is loosely fitted to the main shaft on the outside of the flywheel; a deceleration mechanism for transmitting the speed, a protrusion provided on the carrier, an actuator lever that can be engaged with the protrusion, and an actuator lever that biases the actuator lever between an engaged position and a disengaged position and that is pivoted to the case. It consists of a spring that mechanically toggles a main pawl that can be engaged with the ratchet between an engaged position and a non-engaged position, and a barral lever that cooperates with the lock ring and engages the free pawl with the ratchet. Emergency locking seat belt retractor with automatic lock.