KR101059488B1 - Passenger restraint with seat belt with new chassis guide and anchor plate - Google Patents

Abstract

The present invention provides a passenger restraint device comprising a seat belt device having a double base plate (10, 12) with reduced thickness made of unhardened steel and an embossed chassis guide (1), and also embossed bolts and It provides an unhardened steel anchor plate with reduced thickness with webbing slots.

Unhardened steel, base plate, chassis guide, seat belt device, passenger restraint device, slot, anchor plate

Description

Passenger restraint with seat belt with new chassis guide and anchor plate {OCCUPANT RESTRAINT SYSTEM WITH SEAT BELT HAVING A NOVEL SASH GUIDE AND ANCHOR PLATE}

The present invention relates generally to a passenger restraint device having a seat belt. More specifically, the present invention relates to a seat belt device with a double chassis guide and an anchor plate with reduced thickness.

The car is equipped with a seat belt. The seat belt assembly is an important safety mechanism because the seat belt must restrain the passenger in the event of a crash. It must also be able to absorb and withstand impact forces without any deformation or failure.

Fixed seat belts in automobiles greatly reduce the chance of fatal or serious injury by preventing passengers from hitting the windshield or steering wheel.

The seat belt is provided with a webbing that is configured to extend to a desired level to restrain the passenger sitting in the seat when the vehicle is suddenly impacted. If the webbing is pulled out abruptly, the inertia locking mechanism of the retractor of the seat belt assembly locks the webbing. The webbing of the seat belt is elongated when loaded so that the impact of the vehicle is transmitted to the wearer for a long time with a lower load.

Primarily rigid components such as chassis guides, anchor plates and retractors attached to the bodywork play an important role in load transfer.

The chassis guide is provided in close proximity to the seat assembly inside the vehicle so that the webbing can easily pass through the chassis guide and the webbing can pivot freely.

Conventional seat belts include a chassis guide made of hardened medium carbon steel material having a thickness of about 3 mm. The main problem associated with the chassis guide is that the hardness deteriorates after the heat treatment process, which is an important step in development.

In addition, conventional seat belts include anchor plates made of low carbon steel 4 mm thick to provide optimum load bearing capacity. Existing chassis guide materials are hardened medium carbon steel materials that have been heat-treated to approximately 42-45 Rockwell Hardness Scale C (HRC) to meet tensile load requirements. The heat treatment process is cumbersome and time consuming. To achieve 42-45 HRC, parts must be quenched continuously until the desired product is obtained. If the HRC value is increased, a change will occur in the rigid lattice structure of the material, causing the product to fail. On the other hand, if the HRC value is reduced, the product will begin to surrender well before the yield point, thus causing the product to fail.

The following stress points were observed in the stress analysis of the chassis guide and anchor plate.

(a) bolt holes, and

(b) webbing slot holes.

In view of the stress analysis, there is a need to develop chassis guides and anchor plates in which any desired point where a stress point is observed is reinforced and also to improve the overall tensile strength of the product. In addition, the starting materials used to make the chassis guides and anchor plates of the present invention are selected from unhardened steel materials with reduced thickness without compromising the tensile strength of the article.

It is a primary object of the present invention to provide a seat belt which is a passenger restraint device comprising a double chassis guide and an anchor plate with reduced thickness.

It is an object of the present invention to provide a chassis guide made of starting material which has a reduced thickness but optimally maintains tensile strength and loading properties.

Another object of the present invention is to provide an anchor plate that can withstand high tensile loads in operation even when using a starting material with reduced thickness.

Still another object of the present invention is to provide a chassis guide and anchor plate that are not subjected to heat treatment.

It is another object of the present invention to provide a cost effective chassis guide and anchor plate.

The present invention provides a seat belt device comprising a chassis guide with unhardened steel as starting material and an anchor plate with reduced thickness. In addition, the present invention provides a chassis guide having a reduced thickness by combining bolt and webbing slot embossing, while maintaining tensile strength and load characteristics optimally. In addition, the anchor plate of the present invention can withstand high tensile strength in operation even when using a starting material having a reduced thickness. The chassis guide and anchor plate of the present invention is an uncured material that has not undergone a heat treatment process.

1 is an exploded perspective view of the chassis guide assembly.

1A is a view of a complete seat belt assembly.

2 is an exploded perspective view of the anchor plate assembly.

3 is a side and front view of a dual chassis guide with first and second base plates.

4 is a front and side view of the dual chassis guide and chassis guide showing embossed webbing and bolt slots.

5 is a front and side view of an anchor plate with reduced thickness with embossed bolts and webbing slots.

Referring to FIG. 1A, the seat belt assembly is shown, wherein the seat belt generally includes a retractor that provides a 'inertial' locking mechanism that locks the seat belt upon sudden impact. As part of the seat belt, the seat belt is manufactured to use a webbing 2 having an elongated structure to restrain the wearer of the seat belt for a long time with a lower load. The chassis guide 1 allows the webbing 2 to pivot freely and secure to the vehicle body. The tongue and buckle assemblies are used to securely latch the passenger each time the seat belt is used. The seat belt is supported by the skeletal structure of the body and has a structure that is worn across the front of the pelvis, chest and shoulders. The anchor plate 9 is located proximate to the retractor to receive the webbing. The webbing 2 housed in the chassis guide 1 and anchor plate 9 reaches the highest point in the tongue so that it is easily fastened in the buckle each time the user uses the seat belt.

Accordingly, the present invention provides a seat belt assembly comprising a chassis guide and an anchor plate that restrain an automobile passenger upon sudden impact. 1 to 5, the chassis guide 1 is generally arranged in or close to a loop or support column located immediately behind the passenger. The webbing of the seat belt 1 is fed from the retractor (not shown) to the tongue of the seat belt (not shown) and the anchor plate 9 through the chassis guide 1, the anchor plate being the lower end of the column. Or on a tongue which is also locked to a buckle (not shown) mounted at the bottom of the vehicle body and the other end of the seat belt apparatus. This belt route is called a three-point seat belt that restrains the shoulders and knees of the passenger. The chassis guide 1 is used to properly position the shoulder belt to the passenger and to guide the passage of the belt during stretching and retrieval.

The seat belt device comprising a seat belt with a double chassis guide 1 supported by the anchor plate 9 restrains the vehicle passenger in case of a sudden impact. The dual chassis guide 1 is mounted on the bolt 4 by an embossed bolt slot 15 so as to pivot freely. The bolt 4 hangs on the transverse inner surface of the vehicle in proximity to the top region of the seat belt assembly. Referring to FIG. 3, the chassis guide with the second base plate 10 is made by shearing a sheet made of unhardened steel, preferably a microalloy steel having a reduced thickness of about 2-2.5 mm. The slot 11 is parsed on the second base plate 10 so that the webbing 2 pulled from the retractor assembly (not shown) can pass without interference. The first base plate 12 is made by shearing a sheet made of non-hardened steel, preferably a microalloy steel having a thickness of about 2-2.5 mm, and the embossed webbing slots 13 have a second base plate 10 Like the slot of the ()) is formed in the webbing region of the first base plate 12. Referring to FIG. 4, the first base plate 12 is curled at one end to act as a locking means for the second base plate 10 formed on the first base plate 12. The second base plate 10 mounted on the first base plate 12 has an additional layer of webbing slots 13 in the peripheral area to provide additional tensile strength to the chassis guide. Plastic overmolding 19 (see FIG. 4) is formed in the region of the webbing slots 11, 13 so that the webbing passes smoothly through the chassis guide without wear. The first base plate 12 further extends to provide an area of embossed bolt slots 15 (see FIG. 3) through which the bolts 4 can pass. By embossing the bolt slot 15 to the side in contact with the bolt 4, it can withstand the tear strength acting on the chassis guide 1 during use. Referring to FIG. 1, a bolt slot is provided with an anti rattle bush 5 which has a circular passageway and through which the bolt 4 passes and which provides a rotational effect to the chassis guide 1 when using the chassis guide 1. (15) is disposed on the inner circumference. On the opposite side of the bolt slot 15 a spacer 6 is arranged, together with the spring washer 7 and the transport washer 8 which fix the washer of the chassis guide 1 and the bolt 4. A chassis guide cap 3 is arranged on the bolt head side to cover the bolt 4 by a pair of slots 14.

The chassis guide 1 of the present invention is a metal sheet selected from a low carbon microalloy steel having a reduced thickness of about 2.5 mm to convert the metal sheet into the desired dimensions to form the second base plate 10 for the chassis guide 1. It was developed by shearing. In addition, webbing slots 11 are drilled on the second base plate 10. The first base plate 12 is sheared to the desired shape and dimensions from a metal sheet of low carbon alloy steel with a reduced thickness of about 2 to 2.5 mm, and the corresponding embossed webbing slots 13 are extruded. The embossed bolt holes 15 can be extruded and passed through to secure the bolts 4 to the vehicle body structure. The second base plate 10 is mounted on the first base plate 12 and is locked by the bent portion 17 and the bent portion 18 so that the webbing of the seat belt does not rub against the vehicle body and the webbing slots 11 and 13 It is molded together to form a double webbing region in the region. The first and second base plates 10, 12 molded together are further molded of plastic material in the region of the webbing slots 11, 13. Opposite grooves 28 are provided at both ends of the webbing slot to allow the webbing of the seat belt to pass unobstructed.

Referring to FIG. 5, the webbing of the seat belt 2 may pass through a webbing slot of the chassis guide 1 (not shown), the webbing of which is anchor plate 9 mounted on the bolt 23. Extend further into the assembly. The anchor plate is made of starting material of unhardened steel with a thickness of about 2-2.5 mm. An embossed bolt slot 20 is placed at one end of the anchor plate 9 and an embossed webbing slot 21 is placed at the other end of the anchor plate, and the anchor plate suitably forms a bend 22 so that the webbing is not disturbed. Can pass without. The anchor plate 9 further has a pair of embossed slots 20, 21 which allow the bolt 9 to pass through and the other which receives the webbing 2 from the chassis guide 1. The anti-rattle bush 24 has a circular passageway and is disposed on the circumference inside the bolt slot 20 to provide a rotational effect to the anchor plate 9 when the bolt passes through and uses the anchor blade 9. A spacer 25 is disposed on the opposite side of the bolt slot 20, and the spring washer 26 and the transport washer 27 together with the spacer secure the anchor plate 9 and the bolt 23.

In the event of an impact due to vibration or for some other reason, the passenger may have a retractor (not shown) that secures the chassis guide 1, anchor plate 9, and webbing of the seat belt to support the passenger to the vehicle seat. It is restrained by the seat belt which includes.

The invention is illustrated in the form of the following examples, however, the following examples do not limit the scope of the invention.

Example 1

The chassis guides of the material composition (uncured microalloy steel) provided in the table below were tested to obtain the following properties.

Example 2

An anchor plate of the material composition (uncured plain carbon steel) provided in the table below was tested to obtain the following characteristics.

It will be appreciated that the chassis guide may also be made of the above-mentioned uncured plain carbon steel provided in Example 2.

Advantages

1. The chassis guide and anchor plate of the present invention do not have to undergo heat treatment.

2. Tensile loads are consistently achieved for the chassis guide and anchor plate.

3. Raw materials used for chassis guides and anchor plates are inexpensive.

4. The chassis guide and anchor plate of the present invention meet the test requirements of international standard.

5. The thickness of the anchor plate of the present invention is thinner than the thickness of the conventional anchor plate.

Claims (11)

In a seat belt apparatus for an automobile which restrains passengers by webbing of the seat belt apparatus in case of sudden impact, (a) a dual chassis guide of unhardened steel, coupled with first and second base plates, disposed inside the vehicle to receive the webbing of the seat belts from the retractor, (b) a first embossed bolt slot means of the chassis guide capable of easily mounting the chassis guide to the vehicle body by means of a chassis guide bolt and capable of withstanding the stresses generated when the webbing is urgently pulled out; (c) passing on the webbing of the seat belt when receiving the webbing of the seat belt from the retractor and capable of withstanding the stresses generated when the webbing is urgently pulled on the first base plate of the chassis guide. 1 embossed webbing slot means, (d) an anchor plate of unhardened steel with a reduced thickness such that one end of the webbing is held in place from the chassis guide while the other end of the webbing is fixed to the buckle of the seat by the tongue each time it is used. , (e) second embossed bolt slot means of said anchor plate capable of withstanding the stresses generated when said anchor plate is easily mounted to said vehicle body by anchor plate bolts and urgently pulling said webbing; and (f) second embossed webbing slot means capable of withstanding the stresses generated by securing said webbing of said seat belt and urging said webbing rapidly; Seat belt device comprising a. The method of claim 1, The non-hardened steel is 0.02-0.12% carbon, 0.03-0.09% niobium, 0.096-0.22% titanium, 0.226-1.70% manganese, 0.001-0.50% sulfur, 0.010-0.50% phosphorous, 0.01% aluminum -0.05% by weight, and 0.24-0.50% by weight of silica, the balance being iron (Fe). The method of claim 1, The non-hardened steel, carbon 0.05-0.12% by weight, niobium 0.03-0.09% by weight, titanium 0.096-0.22% by weight, manganese 0.83-1.70% by weight, sulfur 0.001-0.30% by weight, phosphorus 0.016-0.30% by weight, aluminum 0.015 -0.039% by weight and 0.24-0.50% by weight of silica, the balance being iron (Fe). The method of claim 1, The unhardened steel includes 0.039-0.1 wt% carbon, 0.226-0.5 wt% manganese, 0.012-0.050 wt% sulfur, 0.012-0.050 wt% phosphorus, 0.001-0.046 wt% aluminum and 0.01-0.24 wt% silica. And the remaining amount is iron (Fe). The method of claim 1, The unhardened steel comprises 0.039-0.1 wt% carbon, 0.226-0.5 wt% manganese, 0.012-0.050 wt% sulfur, 0.012-0.050 wt% phosphorous, 0.001-0.046 wt% aluminum and 0.001-0.007 wt% silica. And the remaining amount is iron (Fe). The method of claim 1, And said second base plate comprises an unembossed webbing slot means. The method of claim 6, The second base plate is provided with a support, wherein the support of the second base plate is limited to the area of the webbing slot means of the second base plate. The method of claim 6, And the first base plate and the second base plate of the chassis guide are molded together in a plastic material in the region of the webbing slot means. The method of claim 1, And the thickness of said unhardened steel used as starting material of said chassis guide and anchor plate is 2-2.5 mm. The method of claim 2, The material tensile strength of the chassis guide is a seat belt device, characterized in that 540-690 N / mm ² . The method according to claim 3 or 4, The seat belt device of claim ¹ , wherein the chassis guide and anchor plate have a tensile strength of 420-510 N / mm ² .

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