JPS61169354A - Emergency locking device of safety belt winding device - Google Patents

Abstract

PURPOSE:To operate the lock of a safety belt sensitively and reliably by dividing a detection mechanism activating a locking claw under emergency into two steps. CONSTITUTION:When a safety belt is extracted at the predetermined acceleration or more, a ratchet wheel 48 gets the predetermined angular acceleration or more, an inertial claw 53 is rotated centering a pin 52 to be engaged with an activating claw 66. When a shaft 3, i.e., an activating ratchet wheel 48 tends to further rotate under this condition, the activating claw 66 absorbs the approach in response to the movement of the inertial claw 53 while moving in parallel with a transmission claw 39. Simultaneously, the inclination of the activating claw 66 is changed, and the transmission claw 39 is rotated centering a pin 37. Then, the tip section of the transmission claw 39 is engaged with the activating ratchet wheel 48. A locking claw 26 is inclined against the force of a release spring 40, and its center action section 43 is engaged with locking ratchet wheels 7a, 7b. Accordingly, the safety belt is prevented from being extracted.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an emergency locking device that is attached to a safety belt retractor, and more particularly to an emergency locking device that is attached to a safety belt retractor. This invention relates to an emergency locking device for locking the safety belt drawer from further damage when force is applied.

This type of emergency locking device is advantageously used in seats in vehicles, aircraft, etc. that are equipped with safety belts. That is,
Under normal conditions, the safety belt can be freely pulled out or retracted from the safety belt retractor according to the body movements of the person sitting on the seat, but in an emergency, such as an accident, an abnormal load may be applied to the seated person. When this occurs, the safety belt is pulled out to prevent the seated person from flying out of the seat, thereby achieving both comfort in normal conditions and safety in an emergency.

BACKGROUND OF THE INVENTION Up to now, emergency lock devices for safety belt retractors of various types have been proposed. However, most of these emergency locking devices detect that the reel that winds up the safety belt is rotated with an angular acceleration above a predetermined level in response to the sudden withdrawal of the safety belt, and stop the rotation of this reel. They all have a structure that is intended to be prohibited. In order to detect the angular acceleration of the reel and sense that there is an emergency, a member that operates by inertia is often provided.

Problems to be Solved by the Invention In order for the emergency lock device of the type described above to operate sensitively and reliably, the first step is to ensure that the member that detects an emergency is sensitive. However, when attempting to operate a certain type of component by inertia, the more delicate the mounting structure of the component, the more sensitive the operation tends to be.

Boosting: It is not possible to apply a large load to a member with such a delicate mounting structure, and such a member must apply enough force to operate the mechanism until it eventually prohibits rotation of the reel. It is difficult to obtain from

Therefore, this invention provides a member that operates sensitively when an "emergency" is detected, and even such a member that operates sensitively generates a force that can ultimately reliably prohibit the rotation of the reel. An object of the present invention is to provide an emergency locking device for a safety belt retractor that can be used.

Means for Solving the Problems The present invention is characterized in that a two-step detection step is adopted for the mechanism for detecting an emergency. That is, the detection mechanism used in this invention includes an initial detection section that is mechanically weak but operates more sensitively, and a mechanically stronger secondary detection section that operates in response to the operation of this initial detection section. It is equipped with More specifically, the present invention has the following configuration.

That is, a reel for winding up the safety belt is rotatably held on a fixedly provided reel mounting base by a shaft that is fixedly provided with respect to the reel,
An emergency locking device as described below is attached to such a safety belt winding device, in which the reel is biased by a return spring to rotate in the direction of winding up the safety belt.

That is, the emergency locking device includes a locking ratchet wheel that is fixedly provided to the reel, a lock pawl that is held on a reel mounting base and arranged so as to be able to engage with or disengage from the locking ratchet wheel, and the lock pawl. a release spring that always urges the locking ratchet wheel in a direction to disengage the locking ratchet wheel, and a direction that engages the lock pawl and engages the lock pawl with the locking ratchet wheel against the force of the release spring. A transmission pawl that is rotatably provided to the transmission pawl, an activation type that is provided to move parallel to the transmission pawl, a buffer spring that biases the tip of the activation type in a direction that protrudes, and a a starting ratchet wheel that is attached to the shaft and rotates integrally with the shaft, and rotates the transmission pawl in a direction in which the lock pawl engages the locking ratchet wheel when it is engaged with the transmission pawl; The starting ratchet is provided in the stomach so that it can engage with the starting ratchet, and is rotatably mounted around a plurality of pins arranged in the circumferential direction on the end face of the starting ratchet, and corresponds to the direction in which the belt is pulled out. The actuator is provided with a plurality of inertia wheels that assume an engaging posture for starting when the starting ratchet wheel has an angular acceleration of a predetermined value or more in the direction of the starting ratchet wheel.

In the above configuration, the part where the plurality of ffi claws engage for starting constitutes the initial detection part, and the part where the transmission claw that rotates together with the start engages with the starting latch wheel constitutes the secondary detection part. Configure.

Effects According to the present invention, when the belt is suddenly pulled out, the rotation of the reel is transmitted to the starting ratchet wheel via the shaft, and this starting ratchet wheel is rotated with an angular acceleration of a predetermined degree or more. In response to this, the multiple inertial pins rotate around the pin and become engaged for starting, and one of the multiple inertial pins engages for starting and rotates the starting. let

In response to this starting rotation, the transmission claw is also rotated in the same direction. At this time, the force on the mechanism due to the approach of the starting ratchet wheel in the radial direction, which occurs when the starting and inertial parts are engaged, is transmitted by the starting part against the force of the buffer spring. It is absorbed by moving parallel to the nail. When the transmission pawl is rotated as described above, the transmission pawl meshes with the starting ratchet wheel, and is rotated in accordance with the rotation of the starting ratchet wheel, causing the locking pawl to connect to the locking ratchet wheel. move in the direction of engagement with the The lock pawl is held on the reel mounting base, and the lock ratchet wheel is fixedly provided to the reel, so when the lock pawl meshes with the lock ratchet wheel, the rotation of the reel is stopped. It is forbidden. This prohibits the belt from being pulled out.

In this way, in this invention, the detection mechanism that operates when an emergency situation occurs and transmits this operation to the lock pawl is divided into two stages, so there is no need to apply a large load to the inertial mechanism that serves as the initial detection section. There is no technical ability and therefore it can be made to work more sensitively.

Further, a mechanically stronger structure can be adopted for the transmission claw serving as the secondary detection section.

Furthermore, since a plurality of inertia sensors serving as initial detection sections are provided, the state in which they mesh with the starting ratchet wheel can be achieved more quickly and reliably.

Therefore, according to the present invention, there is provided an emergency locking device for a safety belt retractor that operates more sensitively and reliably.

Embodiment FIG. 1 is a 1ilFi plane view showing an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line of FIG. 1.

3 is a partially cutaway plan view of the safety belt retractor shown in FIG. 1. FIG. FIG. 4 is a side view showing overlapping components of the emergency locking device of the safety belt retractor in a locked state.

A safety belt 1 is wound onto a reel 2.

A shaft 3 is fixedly attached to the reel 2. The shaft 3 is rotatably held with respect to the reel mounting base 4. The reel mount 4 is a means (not shown) for fixing this safety belt retractor at a suitable fixed position.
including. A return spring 5 is connected to the left end of the shaft 3 in FIG. 1, and the reel 2 is urged to always rotate in the direction in which the safety belt 1 is wound up.

The return spring 5 is covered by a cover 6. Also,
A locking ratchet wheel 7a is provided at both ends of the reel 2.

7h are arranged, and these act as guides to prevent the safety belt 1 wound on the reel 2 from shifting from side to side. As described above, the shaft 3 is rotatably held relative to the reel mounting base 4, but in this embodiment, a spacer 8 is first placed on the shaft 3, and the shaft 3 is attached to the reel via this spacer 8. It is held against the mount 4.

The spacer 8 also has the function of ensuring that the reel 2 is always positioned and rotated.

With the configuration described so far, this safety belt winding device achieves the operation of lightly pulling out or winding up the safety belt 1 in accordance with the movement of the seated person's body.

Next, the components of this safety belt retractor will be described in more detail, and the structure of the emergency locking device that operates in an emergency will be explained.

The reel 2 shown in a plan view in FIG. 5 and in a front view in FIG. 6 includes a shaft through hole 9 on its central axis. Moreover, a notch 10 is provided on the outer peripheral surface.

The starting end of the belt 1 is received and fixed in this notch 10. Protrusions 11 are provided on both end faces of one side 2. Further, a through hole 12 is provided extending parallel to the shaft through hole 9 .

7 and 8 show locking ratchet wheels 7a arranged at each end of the reel 2, respectively.

7b is shown. Ratchet wheel 7a for each lock.

A ratchet 13 is formed on the outer periphery of each of the parts 7b. A shaft receiving hole 14 having a shape in which a part of a circle is removed by two parallel chords is formed in the center of the locking ratchet wheel 7a.

Further, a circular shaft receiving hole 15 is formed in the center of the locking ratchet 1I7b. A through hole 16 is formed in each of the locking ratchet wheels 7a, 7b to receive the protrusion 11 provided on the reel 2 described above. It also includes a protrusion 17 that is received within the through hole 12 of the reel 2. Therefore, each locking ratchet $
When the protrusion 11 is received in the through hole 16 and the protrusion 17 is received in the through hole 12 with the locking ratchet wheels 7a and 7b arranged at each end of the reel 2, the locking ratchet wheels 7a and 7b
is fixed to the reel 2 in the rotational direction.

The shaft 3 shown in a plan view in FIG. 9, a front view in FIG. 10, and a right side view in FIG.
The non-circular portion 18 has a cross-sectional shape corresponding to the shape of. Further, a notch 19 is provided at the other end of the shaft 3. The shaft 3 is connected to the shaft hole 9 of the reel 2.
When the non-circular portion 18 is positioned within the non-circular shaft receiving hole 14, the shaft 3 is fixed to the one end 2 in the rotational direction via the locking ratchet wheel 7a. The notch 19 in the shaft 3 is for locking the return spring 5 mentioned above.

The reel mount 4 shown in plan view in FIG. 12 and in front view in FIG.
and an upper wall 22 connecting these side walls 20 and 21. Both sides! 20 and 21 each have a spacer receiving hole 2 for receiving the spacer 8 described above.
3 is formed. The spacer receiving hole 23 has a shape in which a circular portion extends at two points. Further, each of the sides 120° 21 is provided with a fan-shaped mounting hole 24,25. These mounting holes 24,25 serve, for example, to hold locking pawls 26, which are shown in FIGS. 2 to 4 and will be explained in more detail later.

Note that due to the shape of the lock claw 26, one of the mounting holes 2
4 has a sector shape with a larger radius than the other mounting hole 25. Two through holes 27 and 2B are formed on one side v120.

For example, the transmission claw holding plate 29 shown in FIGS. 1 to 3 and described later can be attached to the reel mounting base 4.
Works to fix it.

The spacer 8 shown in a plan view in FIG. 14 and in a front view in FIG. 15 has a through hole 30 formed in its center for receiving the shaft 3, and has a cylindrical shape as a whole. The shape of its outer peripheral surface corresponds to the shape of the spacer receiving hole 23 formed in the reel mounting base 4 described above. Also, -
Seven flanges 31 are formed at the ends. Two of these spacers 8 are used, and when arranged as shown in FIG. Hold. 7 langes 31 directly contact the locking ratchet wheels 7a and 7b, respectively.
The reel 2 is positioned at a predetermined position.

The transmission pawl retaining plate 29 mentioned in the previous description is shown in a front view in FIG. 16 and in a bottom view in FIG. 17, respectively. The transmission claw holding plate 29 is attached in contact with the outer surface of one side wall 20 of the reel mount 4. Therefore, two protrusions 32 and 33 are provided on the W side of the transmission claw holding plate 29, and these protrusions 32 and 33 are on the side of the reel mounting base 4! ! It is in a state where it fits into the through holes 27 and 28 provided in 20. The transmission claw holding plate 29 is
It has almost the same planar shape as the side wall 20 of the reel mount 4, and the spacer receiving hole 2 provided in the reel mount 4
A spacer receiving hole 34 having the same shape as 3 is formed.

This spacer receiving hole 34 is aligned with the spacer receiving hole 23 and receives the spacer 8. Transmission claw holding plate 29
In addition, the side of the reel mounting base 4'! Attachment holes 35 are provided at positions corresponding to the attachment holes 24 formed in 20.

The attachment hole 35 is shaped like two sectors connected together. Further, a cover 36 is formed to partially cover the attachment hole 35. Further, a pivot pin 37 is provided below the attachment hole 35, and a stop pin 38 is further provided below the pivot pin 37. The pivot pin 37 is shown in FIGS.
It rotatably supports a transmission claw 39 shown in the figure and described in detail later. The stop pin 38 is for defining one end of the rotation of the transmission claw 39. Further, the transmission pawl holding plate 29 is provided with a holding pin 41 for holding a release spring 40 in the form of a torsion spring shown in FIGS. 2 and 4. Further, a spring locking piece 42 is formed so that one end of the same release spring 40 can be brought into contact with the spring and a spring force can be applied to the other end.

The lock pawl 26 mentioned in the foregoing description is shown alone in a front view in FIG. 18 and in a bottom view in FIG. 19. The lock pawl 26 is made of a metal plate, for example, and is passed between the two side walls 20, 21 of the reel mount 4, as shown in FIG. The locking pawl 26 includes a central working portion 43 that provides a portion that engages with the locking ratchet wheels 7a, 7b described above. In FIGS. 18 and 19, a wider one-sided support portion 44 is formed on the right side of the central action portion 43, and this -force support portion 44
A spring receiving piece 45 extending downward is formed on the right side of the spring. This spring receiving piece 45 is formed with a groove 46 for receiving the end of the Wt release spring 40 described above. At the left-hand end of the central working part 43 in the drawing, a further narrower support part 47 is formed.

For example, as shown in FIG. 3, the locking pawl 26 is configured such that the end of the central working portion 43 is inserted into the mounting hole 24 provided in the side wall 20 of the reel mounting base 4, and the end portion of the central operating portion 43 is inserted into the mounting hole 25 provided in the Il wall 21. The support portion 47 and the transmission claw holding plate 2
The support portions 44 are held in the respective mounting holes 35 provided in the respective mounting holes 9 . In addition, the support portion 44
is partially covered by the cover 36 and the spring receiving piece 45 is exposed from the cover 36. Lock claw 26 like this
In the holding state, the lock claw 26 is inserted into the fan-shaped mounting hole 2.
4.25.35, it is rotatable around the lower 1 m edge of the central working portion 43.

For example, as shown in FIGS. 1 and 3, an activation: 1 ratchet wheel 48, shown in a front view in FIG. 20 and in a bottom view in FIG. 21, is disposed further outside the transmission pawl holding plate 29. be done. A ratchet 49 is formed on the outer periphery of the starting ratchet wheel 48 . Further, a shaft receiving hole 50 for receiving the non-circular portion 18 of the shaft 3 is provided at the center thereof. Thereby, the starting ratchet wheel 4 is held so as to rotate integrally with the shaft 3. A stepped portion 51 is formed at the center of one end surface of the starting ratchet wheel 48 . Starting Chet car 4
A plurality of pins 52 are also provided on one end surface of 8 and arranged in the circumferential direction.

22 and 23 are a front view and a bottom view showing the inertial mold 53. FIG. A through hole 54 is formed in the inertial mold 53 at a position shifted from its center of gravity.

The inertia type 53 has a starting ratchet wheel 4 in its through hole 54.
With the pin 52 of No. 8 accepted, start ratchet 11
A plurality of parts are rotatably mounted on the end face of 148 in a circumferentially distributed manner. The mounting condition of the inertial mold 53 is clearly shown in FIGS. 1 and 2, for example. Note that the inertial mold 53 is held in a free state so as to rotate around the pin 52, but the rotation range of each inertial wind 53 is limited to the step portion 51 formed on the starting ratchet wheel 48. It is regulated by contact.

For example, when the upper and lower parts shown in FIG. 2 are oriented directly in the direction of gravity, the inertial wind 53 located above the shaft 3 is kept in a state in which its tip is in contact with the stepped part 51. On the other hand, the inertial wind 53 located below the shaft 3 is kept in contact with the stepped portion 51 near its base. The inertial wind 53 in the stationary state is
It protrudes outward to approximately the same position as the ratchet 49 of the starting ratchet wheel 48.

A cover plate 55 shown in a front view in FIG. 24 and in a right side view in FIG. 25 is disposed further outside the starting ratchet wheel 48. The cover plate 55 includes a through hole 56 that receives the tip of the pin 52 provided on the starting ratchet wheel 48.

In addition, a through hole 57 in the shape of a circle cut by two parallel chords is formed in the center thereof.

The cover plate 55 is arranged according to FIG. 1 (as shown).
A space is provided in which the inertial wind 53 held by the starting ratchet wheel 48 can smoothly operate by coming into contact with the stepped portion 51 .

To fix the cover plate 55 to the shaft 3, a bush 58 is used, which is shown in plan view in FIG. 26 and in front view in FIG. 27. Bush 58 is
A shaft receiving hole 59 is provided in the center thereof. Further, the shape of its outer circumferential surface is selected to match the through hole 57 of the cover plate 55 described above. Further, a seven flange 60 is formed at one end.

As shown in FIG. 1, the cover plate 55 is held on the non-circular portion of the shaft 3 via the bushing 58;
Finally, when the end 61 of the shaft 3 is caulked,
Each member located on the shaft 3 is rotatably held relative to the reel mounting base 4 without falling off the shaft 3.

The transmission claw 39 mentioned in the previous explanation is shown in a front view in FIG.
It is shown in a bottom view in FIG. 29 and from the right side F in FIG. 30, respectively. The transmission claw 39 includes a through hole 62 that receives the pivot pin 37 provided on the transmission claw holding plate 29 . Further, a stepped portion 63 that engages with the spring receiving piece 45 of the lock claw 26 is provided.

Further, as clearly shown in FIG. 30, this transmission claw 39 is formed with a guide path 64 passing through it in the lateral direction. Further, a notch 65 is provided in communication with the guide path 64 .

Into the guide path 64 of the transmission claw 39 described above is inserted a starter 66 shown in a front view in FIG. 31, in a bottom view in FIG. 32, and in a right side view in FIG. 33. A spring locking piece 67 is formed to protrude from the base portion of the activation device 66, and a locking hole 68 is provided in this spring locking piece 67. Further, a relatively long notch 69 is formed in a part of the upper edge of the activation 66.

The state in which the actuator 66 is inserted into the transmission claw 39 is shown in FIGS. 2 and 4, and is shown enlarged in FIGS. 34 to 36, which will be described later. The actuator 66 is provided within the transmission claw 39 so as to move in parallel to the transmission claw 39 . The range of this parallel movement is defined by the range in which the spring locking piece 67 can move within the notch 65 and the range in which the notch 69 can move while receiving the pivot pin 37 . A buffer spring 70 is connected between the spring engagement piece 67 and the pivot pin 37. One end of the buffer spring 70 is inserted into the locking hole 68. The Il impulse spring 70 biases the actuator 66 in a direction in which its tip protrudes from the transmission claw 39.

Next, the function and operation of the safety belt retractor described above will be explained in relation to the emergency locking device.

First, when this safety belt retractor is installed in a suitable vehicle, it is preferably installed so that the arrow 71 shown in FIG. 2 points in the direction of gravity and the arrow 72 points in the normal traveling direction of the vehicle.

During normal operation, the safety belt 1 is pulled out in the direction of the arrow 73 shown in FIG. Rotated in 74 directions. Arrow 74 like this
Since the rotation in the direction is performed against the force of the return spring 5, the safety belt 1 is pulled out in the direction of the arrow 73 with some resistance. When such pull-out force is removed, the reel 2 is wound up again by the force of the return spring 5 acting on the reel 2. That is, the safety belt 1 is lightly pulled out or wound up in accordance with the body movements of the seated person. In this state, as shown in FIG. 2, the inertia type 53 is maintained in a state in which it does not engage with the starter 66, and the ratchet 49 of the starter ratchet wheel 48 does not engage with the transmission pawl 39. is maintained. This state is shown enlarged in FIG. 34.

In such a steady state, due to the action of the release spring 40,
The locking pawl 26 is maintained in a position in which its central operating portion 43 does not engage with the ratchets 13 of the locking ratchet wheels 7a and 7b. This maintains the position in contact with the stop pin 38.

Next, the operation in an emergency will be explained. As mentioned above, FIG. 4 illustrates the state in an emergency by overlapping the components of the emergency locking device portion of the safety belt retractor. An enlarged view corresponding to this state is shown in FIG. 36, and FIG. 35 shows the third state from the steady state in FIG.
A state in the middle of transition to the locked state shown in FIG. 6 is shown.

Suppose now that the safety belt 1 is pulled out in the direction of arrow 73 with an acceleration of a predetermined degree or higher. In response to this, the reel 2, shaft 3, starting ratchet wheel 48, etc. rotate in the direction of arrow 74, as in the steady state. However, for example, the rotation of the starting ratchet wheel 48 is accompanied by an angular acceleration greater than a predetermined value. Therefore, the inertial mold 53 rotates clockwise in FIG. 35 around the pin 52, and becomes engaged with the starter 66. This rotation of the inertial mold 53 is due to inertia, and especially in this embodiment, centrifugal force is also acting.

As shown in FIG. 35, when the inertia type 53 is in mesh with the starting ratchet wheel 4,
8 tries to further rotate in the direction of the arrow 74, the starter 66 moves parallel to the transmission claw 39 and rotates the inertial type 53.
It absorbs the approach according to the movement on the circular orbit. At the same time, the inclination of the actuator 66 is changed, and the transmission claw 39 is similarly rotated clockwise about the pivot pin 37.

In response to the clockwise rotation of the transmission claw 39 as described above,
The distal end portion of the transmission pawl 39 approaches the starting ratchet 1148 and becomes engaged with the ratchet 49, as shown in FIG. 36 or FIG. 4. Note that at this time, the actuator 66 is being returned to the state of protruding from the transmission claw 39 by the action of the buffer spring 70.

As shown in FIG. 4, as a result of the transmission claw 39 being rotated clockwise around the pivot pin 37, the locking claw 26 is
It is tilted clockwise against the force of the release spring 40, and its central operating portion 43 is brought into engagement with each ratchet 13 of the locking ratchet wheels 7a, 7b. The lock pawl 26 is held by the reel mounting base 4 and is provided with a locking ratchet wheel 7a.

7b is fixed to the reel 2, the lock pawl 26 meshes with the locking ratchet wheels 7a and 7b, thereby firmly prohibiting the rotation of the reel 2, and accordingly, the safety belt 1 is prevented from rotating in the direction of the arrow 73. Withdrawals are prohibited.

When the above-mentioned emergency situation is resolved, the safety belt 1 is about to be wound onto the reel 2 by the action of the return spring 5. Locking ratchet 1 that follows reel 2 at this time
The release spring 40 is arranged so that the lock pawl 26 is released from the locking ratchet wheels 7a, 7b by rotation of I7a, 7b.
energized by. Then, both the transmission claw 39 and the actuator 66 are rotated counterclockwise about the pivot pin 37, returning to the steady state as shown in FIG. 2 or FIG. 34.

The present invention has been described above in connection with the illustrated embodiment;
, etc., can be changed as long as the desired VJ performance is achieved.

Furthermore, in the above-described embodiment, the mounting direction of the safety belt retractor equipped with the emergency locking device is limited to a specific direction.
For example, the direction of the arrow 72 representing the direction of travel of the vehicle may be reversed or may be any other direction.

However, if it is installed as in the above embodiment, in addition to the inertial force received from the rotation of the starting ratchet lI48, the acceleration generated in the vehicle itself can also be applied to the inertial type 53 as an inertial force. . Therefore, inertial type 53
can be operated more sensitively.

Further, regarding the direction of the arrow 71 indicating the direction of gravity, at least in a steady state, it is sufficient that the inertial mold 53 passing through a position facing the activation device 66 is kept in a state not to protrude due to gravity.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line G in FIG. 1. 3 is a partially cutaway plan view of the safety belt retractor shown in FIG. 1. FIG. FIG. 4 is shown from the right side of FIG. 1, illustrating the components of the emergency locking device portion of the safety belt retractor in an overlapping manner, and shows the locked state. 5 and 6 are a plan view and a front view of the reel 2. FIG. 7 and 8 are front views of the locking ratchet wheels 7a, 7b. 9, 10, and 11 are a plan view, a front view, and a right side view of the shaft 3. FIG. 12 and 13 are a plan view and a front view of the reel mounting base 4. FIG. 14 and 15 are a plan view and a front view of the spacer 8. FIG. 16 and 17 are a front view and a bottom view of the transmission claw holding plate 29. FIG. 18 and FIG. 19 are a front view and a bottom view of the lock claw 26. Figure 20 and 2
FIG. 1 is a front view and a bottom view of the starting ratchet wheel 48. FIG. 22 and FIG. 23 are a front view and a bottom view of the inertial mold 53. 24 and 25 are a front view and a right side view of the cover plate 55. FIG. Figures 26 and 27 are
5 is a plan view and a front view of a bushing 58. FIG. Figure 28,
29 and 30 are a front view, a bottom view, and a right side view of the transmission claw 39. 31, 32, and 33 are a front view, a bottom view, and a right side view of the activation device 66. 34, 35, and 36 show the transmission claw 39, the starting 66, the starting ratchet 1148, and the inertial type 53.
The figure shows a state in which the state is sequentially transitioning from a steady state to an emergency state. In the figure, 1 is a safety belt, 2 is a reel, 3 is a shaft, 4 is a reel mount, 5 is a return spring, 7a, 7bG;
24, 25° 35 is the mounting hole, 26 is the lock claw, 37 is the pivot pin, 39 is the transmission claw, 4
0 is a release spring, 41 is a holding pin, 42 is a spring locking piece, 4
5 is a spring receiving piece, 48 is a starting ratchet wheel, 52 is a pin, 53 is an inertial type, 64 is a guide path, 66 is for starting, 67
70 is a spring locking piece, and 70 is a buffer spring. Funeral 2 Figure Stone 4 Figure 5 Figure 7 2 Figure 7 Funeral IO Figure Funeral II Figure 14 C Figure 17 Funeral Figure A5 l De Figure 20 Figure 4 De 50
54 tower, figure 4, figure 25, funeral 26 figure, figure 27, y-jJ' 6 60 figure 2 ♂ heart jO, figure 3/U figure 32

Claims (1)

[Claims] A reel for winding up a safety belt is rotatably held on a fixedly provided reel mounting base by a shaft that is fixedly provided with respect to the reel, and the reel is not returned. An emergency lock device attached to a safety belt retractor that is biased by a spring to rotate in the direction of retracting the safety belt, the device comprising: a locking ratchet wheel fixedly provided to the reel; and a reel attachment. A lock pawl that is held on a base and arranged so as to be able to engage with or disengage from the locking ratchet wheel, a release spring that always biases the lock pawl in a direction to disengage from the locking ratchet wheel, and a lock pawl a transmission pawl that is rotatable in a direction in which the lock pawl engages with the locking ratchet wheel against the force of a release spring; a buffer spring that biases the tip of the activation pawl in the direction of protrusion; and a buffer spring that is installed at a position where it can mesh with the transmission pawl, is attached to the shaft, rotates integrally with the shaft, and meshes with the transmission pawl. a starting ratchet wheel that rotates a transmission pawl in a direction in which the lock pawl engages with the locking ratchet wheel when the lock pawl is engaged; A plurality of inertia pawls are each rotatably attached around a plurality of arranged pins and assume a posture of engaging the starting pawl when the starting ratchet wheel is angularly accelerated beyond a predetermined value in a direction corresponding to the direction in which the belt is pulled out. An emergency locking device for a safety belt retractor, comprising: