JP2844395B2 - Safety belt winder with tensioning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt winding shaft which is supported on a case end wall and can be restrained by a control device, and which can be connected to the belt winding shaft via a joint which is driven at the time of starting. and a tensioning device, safety belt winder with the tensions equipment.

[0002]

2. Description of the Related Art Such a safety belt winder is known from DE-A-3407378. In such a safety belt winder having a tensioning device, the belt winder is supported in the case of the safety belt winder so as not to be able to move in the radial direction in the radial direction, and the belt winder is restrained by the belt winder. At the control device side of the winding machine, a blocking member that can swing in the radial direction is supported on the belt winding shaft, and the position of the connection with the teeth fixed to the case by the action of the control device that reacts to the vehicle and the belt. The belt winding shaft is prevented from rotating when the teeth are engaged. The tensioning device is provided on the opposite side of the case, i.e. on the tensioning device side, and the tensioning device is connected via a transmission line to a sheave supported on the belt winding shaft and fixedly connected to the belt winding shaft. A radially deflectable blocking member is supported by the sheave for engaging the coupling teeth, so that when the transmission rope is unwound from the sheave by the action of inertia, the blocking member is connected to the belt winding shaft joint. Radially deflected to engage the teeth, thereby connecting the sheave and the belt winding shaft to one another.

[0003] Such a connection between the tensioning device and the belt winder is maintained until the entire belt winding shaft engages with the teeth formed on the case end wall together with the restraining teeth fixed thereto by the action of the control device. It cannot be diverted to a belt winder in which the belt winding shaft is restrained by moving in the radial direction. A belt winder operated by a belt winding shaft which can be moved radially to a restraining position in accordance with this restraining principle is disclosed, for example, in DE-A-264 264.
No. 6238. Now, when the tensioning device acting on the belt winding shaft is started,
Because the force generated by the tensioning device moves the radially movable belt winding shaft to the restraining position, a reliable winding movement is not performed during tensioning.

[0004]

The object underlying the present invention is therefore to provide a safety belt winder in which a radially movable belt winding shaft can be connected to a tensioning device acting thereon. It is to present.

[0005]

According to the present invention, a belt winding shaft has a group of restraining teeth fixed to the shaft for restraining a belt winding roller, and a tooth fixed to a case. To engage the group, it is movable in the radial direction, and the tooth spaces of the group of restraining teeth have a flexible cover to form a smooth outer periphery.

[0006]

According to the present invention, since the tooth grooves of the constraining teeth of the belt winding shaft are covered, a smooth outer ring is formed. In the case of tension, the belt slides along the teeth fixed to the case of the belt winding machine. The smooth outer periphery of the take-up shaft is supported by a set of teeth fixed to the case, making it impossible to move the belt take-up shaft in the radial direction until the respective set teeth of the belt take-up shaft and the case end wall engage. I do. Thus, despite the restraining principle of the radially movable belt winding shaft, it is possible at first to carry out the tensioning movement by reverse rotation of the belt winding shaft.
Only when a large load occurs due to the belt pull-out force acting after the belt winder is stopped, the belt wind-up shaft moves in the radial direction, and the teeth of the teeth fixed to the case become the teeth of the restraining teeth of the belt wind-up shaft. The cover of the tooth space is pierced to engage with the group of restraining teeth of the belt winding shaft, whereby the belt winding shaft and the case are mutually restrained.

[0007]

According to an embodiment of the present invention, the tooth groove cover of the group of restraining teeth fixed to the shaft is configured as a connecting bridge that can be broken by receiving a load. Instead, the tooth space cover may be formed of a sleeve which is fitted over the set of teeth, which sleeve may consist of a plastic which can be broken under a suitable load. In this case, when the belt wind-up shaft is tensioned, the teeth of the case-side teeth slide on the cover, and the resistive force that does not engage with the belt wind-up shaft's restraining teeth is generated.
Make sure the cover has.

According to another embodiment of the present invention, a belt winding
In the restraining position of the take-up machine, the belt take-up shaft is still radius
With no teeth fixed to the case
At least one tooth is on the cover of the constrained teeth group of the belt winding shaft
As shown in, the position of the tooth space of the constraining teeth on the belt take-up shaft
Are fitted to the teeth of the tooth group fixed to the case .

The connection between the tensioning device and the belt winding shaft is supported by the sheave so as to be able to swing outward in the radial direction via a transmission rope until it engages with a set of teeth fixed to the sheave and the shaft. According to another embodiment of the present invention, the coupling teeth and the tensioning device-side restraining teeth are configured axially side by side or, alternatively, are tensioned by a tensioning device. The teeth for both the connection of the belt and the restraining of the belt winding shaft can be provided in one plane in the axial direction.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS An embodiment of the invention is shown in the drawings and will be described hereinafter.

The safety belt winding machine 10 has a belt winding shaft 11, from which the belt 12 can be rewound. The belt winding shaft 11 is a belt winding machine 1
The outer case 15 is supported in the outer cover 15 so as to be movable in the radial direction through the notch 14 of the case end wall 13. On the so-called control device side 16 of the belt winder 10, there is a control device for controlling the take-up spring and a blocking member for preventing the belt winder 10 from being pulled out in response to the vehicle and the belt. A joint 17 connects the belt winding shaft 11 to a tensioning device (not shown). The notch 14 in the case end wall 13 has a group of teeth 18 fixed to the case,
In the plane of the case end wall, the belt winding shaft 11 is provided with a group of teeth 19 fixed to the shaft. During the radial movement of the belt winding shaft 11, the teeth 18 and 19 engage with each other to prevent a further rotation of the belt winding shaft 11.

A sheave 20 is rotatably supported on a belt winding shaft 11, and a transmission rope 21 is wound around the sheave 20. This transmission line 21 is generally connected to a piston-cylinder drive to which a pressure medium is applied, and after the tensioning device is started, the transmission line 21 is unwound from the sheave 20. A blocking member 22 is supported on the sheave 20 so as to be able to swing outward in the radial direction. When the sheave 20 rotates, the blocking member 22 deflects outward due to the inertial force acting on the blocking member, and the belt is rotated in the same plane. Since the sheave 20 is engaged with the joint teeth group 23 formed on the winding shaft 11, the connection between the sheave 20 and the belt winding shaft 11 is performed.

As can be seen from FIGS. 2 and 3 of the drawings, the tooth space 24 between the tips 25 of the restraining teeth 19 of the belt winding shaft 11 has a cover 26. When a movement force is generated on the belt winding shaft 11 by the tensioning device during the reverse rotation of the belt winding shaft 11, the cover 26 acts against this movement, and the smooth outer periphery of the restraining teeth group formed in this way causes a case. The cover 26 has a predetermined strength so as to slide along the teeth 18 of the side teeth group.

The safety belt winder according to the present invention operates as follows. When the tensioning device is started more and more in the event of an accident, the belt winding shaft 11 is first rotated in reverse during tensioning. At this time, the belt take-up shaft 11 is pressed against the case-side teeth 18 by the smooth outer periphery formed by the cover 16, so that the reverse rotation of the belt take-up shaft 11 is not prevented.
After the tensioning motion is completed, a load is applied to the belt winder by the belt pulling force acting on the belt winder, and the belt pulling force is controlled by the control device on the case side of the belt winding shaft 11 having the restraining teeth group 19. This is converted to a radial movement towards the teeth 18 and the teeth 18 now break through the cover 26 due to the large load, so that the teeth 18, 1 at the tensioning device side 17.
9 and thus the belt winding shaft 11 is securely restrained.

In this case, the necessary coupling displacement of the belt winding shaft 11 is given by the elasticity of the cover 15 made of plastic.

In particular, the advantage also arises from the fact that the belt winding shaft does not reach its restraint position during an unexpected start-up of the tensioning device and can therefore be fully functional.

Although not shown, the belt winding shaft 1 may also be formed by fitting a sleeve made of a suitable material, preferably plastic, onto the group of restraining teeth 19 of the belt winding shaft 11.
A smooth outer circumference of one set of restraint teeth 19 is obtained.

As can be seen from the upper half of FIG. 1, FIG. 2 and the lower half of FIG. 1, and FIG. 3, a restraining tooth group 19 whose position is defined by the position of the tooth group 18 of the case end wall 13, and a belt winding. The joint teeth group 23 connected to the take-off shaft 11 can be provided side by side in the axial direction. However, it is also possible to provide two groups of teeth acting radially outward and radially inward in one plane in order to obtain a small overall axial length.

The features of the invention disclosed in the above description, the claims, the abstract and the drawings, both individually and in any combination, are important for implementing the invention in various aspects.

[Brief description of the drawings]

FIG. 1 is a side view of a safety belt winder in which a tensioning device side is notched, wherein an upper half shows a joint tooth group and a restriction tooth group shifted in an axial direction, and a lower half shows a joint tooth group and a restriction tooth. The groups are in the same plane.

2 is a sectional view perpendicular to the axis of the safety belt winder in the upper half of FIG. 1;

FIG. 3 is a sectional view perpendicular to the axis of the safety belt winder in the lower half of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Safety belt winder 11 Belt winding shaft 18 Teeth fixed to case 19 Constrained teeth fixed to shaft 24 Tooth groove 26 Cover

Continuation of the front page (72) Inventor Thomas Schmidt Teinmendorfer Schutland Crotch Shuttle 2 in Germany (58) Field surveyed (Int.Cl. ⁶ , DB name) B60R 22/46

Claims (7)

(57) [Claims] Has a belt take-up shaft can be restrained by the action of the claims 1] is supported on the case end wall control unit and a coupling capable tensions device in the belt winding shaft via a joint to be driven when the starting in things, has a belt winding shaft for restraining the belt winder (10) (11) is constrained teeth fixed to the shaft (19), for engaging a fixed teeth on the case (18) A tensioning device, characterized in that the tooth spaces (24) of the constraining teeth (19) have a flexible cover (26) so as to be movable in the radial direction and form a smooth outer periphery. Have a safety belt winding machine. 2. The method according to claim 1, wherein the cover for the tooth space is formed as a connecting bridge which is provided between the tooth tips and which can be broken under load. Item 1
The safety belt winder according to the above. 3. The safety belt winder according to claim 1, wherein the cover for the tooth space is formed from a sleeve that is fitted onto the set of teeth. 4. The cover (26) applies a folding force such that the teeth (18) on the case side slide on the cover (26) of the restraining teeth (19) of the belt winding shaft (11) during the tensioning movement. 4.) The safety belt winder according to claim 1, wherein the safety belt winder has: 5. When the belt winder (10) is in the restrained position,
And the belt winding shaft (11) still moves in the radial direction.
Without the teeth (18) fixed to the case
Also, one tooth is a group of restraining teeth (1) of the belt winding shaft (11).
9) As shown on the cover (26) , the belt winding shaft
The position of the tooth space (24) of the restraint teeth group (19) of (11)
The teeth of the group of teeth (18) fixed to the case (13)
Wherein the are, safety belt winder according to one of claims 1 to 4. 6. A tensioning device is coupled via a transmission line to a sheave supported on a belt winding shaft (11) and to a coupling teeth group (23) fixedly connected to the belt winding shaft. The engagement member is supported on the sheave by a radially deflectable blocking member, and the coupling teeth (23) of the belt winding shaft (11) and the tensioning device-side restraining teeth of the belt winding shaft (11). The safety belt winder according to any one of claims 1 to 5, wherein the (19) and the (19) are provided offset from each other in the axial direction. 7. A tensioning device is connected via a transmission line to a sheave supported on a belt winding shaft (11) and to a coupling teeth group (23) fixedly connected to the belt winding shaft. A radially deflectable blocking member is supported by the sheave for engagement with the pulley, and a set of teeth (23) of the belt winding shaft (11) is restrained in the axial direction by a set of teeth of the belt winding shaft (11). (1
2. The method according to claim 1, wherein the first surface is provided on the surface of the first embodiment.
6. The safety belt winder according to any one of items 5 to 5.