JPS6257540B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an emergency locking device for a seat belt. Nowadays, as automobiles become faster, there is an increasing need for occupants to wear seat belts. At that time, it is normal to operate the seat belt by hand each time you get on or off, but in order to save you the hassle, we use a drive system that automatically tightens the seat belt according to the opening and closing of the door and when you take off and take off the seat.
It has become common practice to wear devices that open the door. However, with conventional devices, if the door is opened by the shock or the belt is released at the same time when the vehicle is subjected to an impact, sudden acceleration, or deceleration due to a collision or rollover, then the collision will occur. The drawback was that the occupants could be thrown out of the vehicle due to the shock.

In addition, an emergency locking device has been proposed that not only securely locks the belt to the vehicle in the event of a vehicle emergency as described above, but also releases the locking when the door is opened and the drive device is activated. There is also a problem in that the belt is unlocked even if the door is opened. On the other hand, a device has been proposed in which the release of the belt lock is independent of the door opening, but in this case, the drive device cannot be moved unless the belt lock is released, so the door connected to the drive device cannot be moved. It is difficult to open it from the outside and quickly rescue the occupants.

This invention eliminates various drawbacks as mentioned above,
The purpose of the present invention is to provide an emergency seatbelt locking device that can securely lock a seatbelt in the event of an impact using a simple device, and that can quickly rescue occupants when the emergency situation subsides. .

To explain this invention with reference to figures, Fig. 1 is an explanatory diagram of a mechanism in which the invention is implemented as a passive type in which the belt is attached and detached in conjunction with the opening and closing of the door. The other end of the belt 6, which is attached and pulled out from the retractor, is locked to the emergency release buckle 3 and the removable tongue 5. The buckle 3, the tongue 5, and the tongue portion 2 integrated with the buckle 3 form a runner R, and the tongue 5 and the buckle 3 prevent the occupant from operating the push button 3' of the emergency release buckle 3 in the event of a vehicle emergency. The engaged state is normally maintained for as long as possible. The runner R is pulled and moved on a guide (not shown) by a wire 8 as a driving member attached to a driving pulley 9 that is driven when the door 10 is opened or closed. When the door is opened, the runner R is moved to the left in the figure, releasing the belt and the occupant can freely enter and exit from below the belt. When the door is closed, the pulley 9 is operated and the runner R is moved to the right, and the seat belt 6 is tightened. The tongue part 2 of the runner R enters into a latch part 4 attached to the inner wall of the vehicle to hold the seat belt 6 in a fastened state. However, as will be described later, an emergency locking device is attached to the latch portion of the lever in case of an impact or the like.

To explain the driving method of the runner R based on FIG. 1, the pulley 9 consists of two rotating parts 91 and 92 that rotate in opposite directions according to the opening and closing of the door, and the wire 8 has one end attached to the rotating part 91. The other end is wound around a rotating portion 92, and the folded portion is wound around a pulley 47 (FIG. 3), which will be described later. By doing so, the wire 82 is divided into a portion 81 that is wound around the rotating portion 91 and a portion 82 that is wound around the rotating portion 92 with the pulley 47 as a boundary.

When closing the door, the rotating portion 91 of the pulley 9 rotates to feed out the wire, and the rotating portion 92 rotates to wind the wire, and vice versa when opening the door. A portion 81 of the wire 8 is attached to the runner R, and a portion 82 of the wire is left unrelated to the runner R.

Then, when closing the door, the wire 8 is let out from the rotating part 91 via the pulley 47,
It is wound around the rotating part 92. The wire section 81 then pulls the runner R to the right in FIG.
Therefore, the tongue part 2 is inserted into the latch part 4, and the belt 6 tightens the occupant.

Conversely, when opening the door, the wire section 81 is let out from the rotating section 92 via the pulley 47 and wound around the rotating section 91. As a result, the wire portion 81 pulls the runner R to the left in FIG. 1, and brings the belt 6 to a position where it does not interfere with the passenger getting on and off the vehicle.

FIG. 2 is a detailed view of the tongue portion 2, and the tongue portion 2 of the runner R consists of three components: a central base tongue 21 and side covers 22, 23 on both sides thereof. The base tongue 21 is integrated with the emergency release buckle 3 and is connected to the belt 6 via the tongue 5 which engages with the buckle. A first side cover 22 and a second side cover 23 are attached to both sides of the base tongue 21.
Both side covers 22 and 23 are tightened by the caulking pin 31 through the elongated hole 21b of the base tongue 21, and the base tongue 21 and both side covers 22 and 2 are tightened together.
It can move relative to 3. The caulking pin 31 is attached through the hole 22b of the cover 22 and the hole 23b of the cover 23. The belt mounting side of the cover 23 has a thickened wire clamping body mounting part 24, into which a protruding part 26' of the wire clamping body 26 is fitted. and hole 22 of cover 22
a, the shear pin 30 is inserted through the long hole 21a of the base tongue 21, the hole 23a of the cover 23, and the hole 26a of the protrusion 26, and the wire clamping body 26 is fixed to the cover 23. The spring support 28 is fixed to the base tongue 21 by inserting a pin through its hole 28c and the hole 21c of the base tongue 21. Then, a spring 29 is inserted between the lower part of the wire clamping body mounting part 24 and the spring support 28,
The clamping bodies of the covers 22 and 23 are pressed to the right in the figure relative to the base tongue 21. Therefore, normally, the shear pin 30 and the caulking pin 31 are arranged to contact the right ends of the elongated holes 21a and 21b of the base tongue 21, respectively (see FIGS. 4 and 5). The wire clamping body 26 clamps and fixes the intermediate portion of the portion 81 of the wire 8 wound around the pulley 9 using the wire presser 27 . The other opposite wire is not tightened anywhere. Therefore, when the wire is driven by the pulley 9, the runner R including the tongue portion 2 is moved left and right.

FIG. 3 shows details of the latch part 4, and the housing 41 into which the tongue part 2 is inserted has a box shape with an open bottom and a base 41'' whose upper plate 41' is attached to the inner wall of the vehicle. , the upper plate 41' has a hole 41a into which the pawl 43 is fitted, and a side member 42.
There is a hole 41b for attaching to the vehicle, and the base 41'' also has a hole 41d for attaching to the vehicle.

A side member 42 is provided on the lower opening side of the housing 41.
is attached to the housing by inserting and passing pins 49 through holes 41b and 42b. A spring 44 is then provided in the cavity formed by the hole 41a in the housing and the recess 42c in the side member. A bottom plate 45 is attached to the opposite side of the base 41'', a slider 46 is placed therein, a pulley 47 for folding the wire is housed in a recess 46a of the slider, and the middle portion of the wire 8 is wound. Wall 45' on the belt side (left side in the figure) of the bottom plate 45 and slider 46
A spring 48 is inserted between them. And this wall 45'
A hole 45a is made in the hole 45a through which the wire passes. Furthermore, a lever support 50 is attached to the base 41' on the belt side (ie, on the left side in the figure) from the bottom plate 45 by screwing or the like through a hole 50c. A lever 55 serving as a movement preventing member is tiltably attached to the protrusion 58 of the support base 50 using a pin 52 passing through a hole 50b of the protrusion. A pendulum hanging rod 51 is passed through the hole 50a of the support base 50, a pendulum 53 is attached to the tip thereof, and a hemispherical head 5 of a lever 55 is attached to the upper flat head 51' of the rod.
6 is on it. Pendulum 53 and pendulum hanging rod 5
1 constitutes an inertial device. When a vehicle emergency situation is sensed and the pendulum swings, the head 56 of the lever is pushed by the flat head 51', the lever 55 is tilted, and the tip 57 of the lever is inserted into the notch 41c of the housing 41. It's starting to come in.

At the upper side edges of the three pieces 21, 22, and 23 of the tongue portion 2, overlapping teeth 21d and 2 of the same shape engage with the tip 57 of the lever through the notch 41c.
2d and 23d are provided, respectively. On the opposite side, the base tongue 21 has teeth 21 that engage pawls 43.
The covers 22 and 23 have teeth 22c and 23c, respectively, with gentle slopes for releasing the engagement between the teeth 21e and the pawl 43.

Next, the operation of the device of this invention will be explained.

In FIG. 4, the tongue part 2 is inserted into the housing 41, but the lever tip 57 has a notch 41c.
It shows what is not inside. FIG. 5 is a sectional view taken along line AA in FIG. 4. When the tongue part is assembled, the spring 29 presses between the spring support 28 attached to the base tongue 21 and the thick part of the second side cover 23 as described above. Second
Both the side cover 23 and the first side cover 22 fastened thereto are pushed relatively to the right in the figure, and as shown in FIGS. 4 and 5, the shear pin 30
and the caulking pin 31 are the elongated holes 21 of the base tongue 21.
It touches the right end of a and 21b. As described above, the part 81 of the wire 8 on the side that is fastened to the cover 23 of the tongue part 2 is pulled toward the pulley 9 when the door is opened, and is pulled from the drive pulley 9 side to the pulley 47 side when the door is closed. Therefore, when the door is closed, the runner R including the tongue portion 2 is pulled to the right, the tongue portion 2 is inserted into the housing 41 of the latch portion 4, and the belt 6 tightens the occupant.

Now belt 6 is pulled, base tongue 21
Even if it tries to move to the left in the diagram, the base tongue 21
The teeth 21e engage with the pawl 43 pushed inward by a spring 44 to prevent the tongue portion 2 from coming off. When the door is opened, the wire section 81 is wound around the rotating section 91 and the section 82 is wound around the rotating section 9.
2, the portion 81 of the wire 8 now pulls the runner including the tongue portion to the left in the figure. Then the wires are connected to both covers 22 and 23.
8 and 9, which are similar to FIGS. 4 and 5, the base tongue 21 is pulled to the left.
Since the teeth 21e thereof are engaged with the pawl 43 and are fixed, both the covers 22 and 23 are first moved to the left through the long holes 21a and 21b relative to the base tongue 21 against the spring 29. The teeth 22c and 23c, which have a gentle slope for disengaging the engagement, move toward the tooth 21.
pawl 4 by teeth 22c and 23c.
3 is pushed outward against the spring 44, the pawl 43 and the tooth 21e are also disengaged, the entire tongue portion 2 is removed from the housing 41 to the left, the runner moves to the left, and the belt is loosened. It turns out.

10 and 11 show an embodiment of the inertia device of the emergency locking device of the present invention, and FIG. 10 shows the normal state in which the pendulum 53 is suspended vertically and is in the first position; In Figure 11, the pendulum swings when it senses a change in speed of the vehicle that is greater than a set value, which will be described later.
The figure shows the state in which it has been moved to the position. As shown in FIG. 11, when the pendulum swings, the head 56 of the lever 55 is pushed by the flat head 51' of the hanging rod 51 of the pendulum 53, and the lever tilts around the pin 52. As shown in FIG. 7, the tip 57 enters the notch 41c, and the teeth 21d, 22d, 2
Engage with 3d. Therefore, even if the belt 6 is pulled by the occupant who is subjected to inertial force, the base tongue 2
1 is securely locked in the illustrated position by a pawl 43 and a lever 55. A torsion spring 54, which is a biasing means, is wound around the pin 52, and is attached to the lever and the support, respectively. By selecting the strength of the spring, it is set to a value above a predetermined value at which the pendulum itself begins to swing. For example, if the pendulum does not operate unless it senses a vehicle speed exceeding the IG, and the emergency locking device is activated when the vehicle does not experience a speed change exceeding the above set value, such as when stopped on a steep slope. You can prevent it from happening. In addition, in the event of an emergency locking such as when the vehicle overturns, the vehicle will momentarily experience a speed change that exceeds the above set value, so the lever 55
engages with the base tongue 21 to securely lock the belt 6. However, when the speed change exceeding the above set value ends (i.e. when the emergency situation subsides)
has a torsion spring 5 acting via a lever 55.
The pendulum 53 is returned to the state shown in FIG. 10 by the biasing force 4. Therefore, for example, if the door is opened from the outside in an attempt to rescue an occupant, the lever 55 and the tongue part 2 are not engaged, so the wire is connected to the cover 2.
2 and 23, the tongue portion 2, ie, the runner, moves after passing through the state shown in FIG. 8, loosening the belt, and allowing the occupant to be quickly rescued.

Other embodiments of the inertial device are shown from FIG. 12 onwards.
In the example shown in FIGS. 12 and 13, the base 4
A vertical weight 1 is mounted on a support stand 150 attached to a
53 upright, and the head 5 of the lever 55 is placed above it.
6 is on it, and when the weight tilts due to the impact,
The head of the lever 55 is pressed and the lever tilts.
In the embodiment shown in FIGS. 14 and 15, the base 4
1'' has a cavity 250' with a slope 250'', in which a steel ball 253 is inserted.
is accommodated, and the head 56 of the lever 53 rests on the steel ball via a pressing member 251'. Normally, the steel ball 253 searches the slope 250'' and is at the bottom of the cavity, but when it receives an impact, the steel ball moves on the slope due to inertia and pushes up the pressing member 251', thereby pushing the 15th Head 56 of lever 55 as shown
Lift it upward. This causes the lever 55 to tilt.

Next, the function of the shear pin 30 as a safety device will be explained. As mentioned above, when the emergency situation subsides, the lever 55 is no longer engaged with the tongue portion 2, so the door can be opened from the outside, but in the event of a high-speed collision, etc., the inertia of the occupant A large force is applied to the belt, and the lever 5 is deformed.
5 and the tongue portion 2 may not be released due to the biasing force of the torsion spring 54. Therefore, the hole 22a of the first side cover 22, the hole 21a of the base tongue 21, the second side cover 23
The shear pin 30 is inserted through the hole 23a, thereby fixing the protrusion 26' of the wire clamping body 26 in the recess 25 of the attachment part 24 of the cover 23. The breakage strength of the shear pin 30 is made weaker than the breakage strength of the lever 55. When the wire 8 is pulled with a force stronger than the breakage strength of the shear pin in an attempt to open the door to rescue the occupant, the shear pin breaks and
Only the wire clamping body 26 is pulled by the wire 8 and comes out of the recess 25 of the cover 23, making it possible to open the door. Therefore, in this case, by pressing the button on the emergency release buckle 3 and removing the safety belt, the occupant can be quickly rescued.

As explained above, in the emergency locking device according to the present invention, when a sudden impact such as a collision is received, an inertial device such as a pendulum is activated to tilt the lever and prevent the tongue from slipping out of the latch due to the impact. When the impact stops and the inertial device returns to horizontal, the lever will disengage, so you can open the door and release the seatbelt, or even if the lever does not disengage, there is a safety device. The door can be opened by pressing the button on the emergency release buckle 3 attached to the tongue and removing the safety belt.
The slider 46 housing the pulley 47 around which one end of the wire 8 is wound is supported by a spring 48, so when a large force is applied to the wire 8, the slider 46 moves and the tongue portion 2 also moves accordingly. Since it is movable, it is possible to avoid applying excessive force to the entire body, and also to ensure good engagement of the teeth of the tongue portion.

The device of the present invention has the configuration as described above, and provides an emergency seatbelt locking device that is simple and reliable in operation, and that can quickly rescue the occupant when the emergency situation subsides. be.
It goes without saying that this invention can be applied to various embodiments within the spirit thereof.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the present invention implemented as a passive belt device, Fig. 2 is an explanatory diagram of the tank section, Fig. 3 is an explanatory diagram of the latch section, and Fig. 4 is an explanatory diagram of the tongue section inserted into the latch section. FIG. 5 is a sectional view taken along line A-A in FIG. 4, and FIGS. 6 and 7 are diagrams showing a state in which the engagement lever is engaged. Figures 8 and 9 are explanatory diagrams of the state in which the tongue part is detached from the latch part, Figure 10,
FIG. 11 shows a first embodiment of the inertial device, FIG. 12,
FIG. 13 shows the second embodiment, and FIG. 14 shows the first embodiment.
Similarly, FIG. 5 is a diagram showing the states of the third embodiment. (Explanation of symbols), 1... Seat, 2... Tongue part, 3... Emergency release buckle, 4... Latch part, 5
... Emergency release buckle tongue, 6 ... Seat belt, 7 ... Retractor, 8 ... Drive wire, 9
... Drive pulley, 10 ... Door, 21 ... Base tongue, 22, 23 ... Side cover, 21d,
22d, 23d... Teeth that engage with the lever, 21e
...Engaging teeth, 22c, 23c... Disengagement teeth, 30... Shear pin, 31... Clamping pin, 41
...housing, 42 ... side member, 43 ... pawl, 44 ... spring, 45 ... bottom plate, 46 ... slider, 47 ... pulley, 48 ... spring, 49 ...
Mounting pin, 50... Lever support base, 51... Pendulum hanging rod, 51'... Flat head of rod, 52... Pin, 53... Pendulum, 54... Torsion spring, 55
...Lever (lever as a transmission member), 56...
... Lever head, 57 ... Lever engaging part, 58
...Protrusion of the support base.

Claims (1)

[Claims] 1. In an emergency locking device of a device that tightens the seat belt by inserting a tongue portion connected to a seat belt into a latch portion attached to a vehicle, the tongue portion is attached to the latch portion and is applied to the vehicle at a speed exceeding a predetermined value. an inertial device that operates upon sensing a change; a movement prevention member that engages with the tongue portion to prevent its movement when the inertial device is activated; and a drive that is activated in response to opening and closing of the door. a wire-shaped driving member driven by means and connected to the tongue; and a wire-shaped driving member inserted between the driving member and the tongue, and usually connecting both members together; When a force exceeding the value is applied, it breaks,
An emergency locking device for a seatbelt, comprising a safety device that releases the connection between the two members before the blocking member is destroyed.