WO2006118367A1

WO2006118367A1 - Impact absorbing apparatus for use in vehicle collisions

Info

Publication number: WO2006118367A1
Application number: PCT/KR2005/003040
Authority: WO
Inventors: Hyun Soo Shin
Original assignee: Hyun Soo Shin
Priority date: 2005-04-29
Filing date: 2005-09-14
Publication date: 2006-11-09
Also published as: KR20060113011A; KR100645093B1

Abstract

Disclosed is an impact absorbing apparatus (100) for use in vehicle collisions, in which, when a vehicle collides with the impact absorbing apparatus (100), the front partitions (50) easily move forward so that support guiders (110) are not broken, anchors (130) are not stuck in the ground but are firmly locked into holes (61a) of a ladder (61), and contracted waste tire members (40) are not restored to their initial state even when a slack adjuster (64) is damaged, thereby efficiently preventing the secondary collision caused by the opposite-directional movement of the ladder (61).

Description

IMPACT ABSORBING APPARATUS FOR USE IN VEHICLE

COLLISIONS

Technical Field

[1] The present invention relates to an impact absorbing apparatus using waste tires, which is applied to vehicle collisions, and more particularly to an impact absorbing apparatus for use in vehicle collisions, in which, when a vehicle collides with the impact absorbing apparatus, front partitions easily move forward so that support guiders are not broken, anchors are not stuck in the ground but are firmly locked into holes of a ladder, and contracted waste tire members are not restored to their initial state even when a slack adjustor is damaged, thereby efficiently preventing the secondary collision caused by the opposite-directional movement of the ladder. Background Art

[2] As well known to those skilled in the art, traffic accidents have been increased by drastic expansion of traffic volume caused due to expansion of economic scale and increase of income, and high-speed trends of road traffic due to the improvement of capacity of vehicles, and have been large-sized, , thereby leading to drastic national and social loss. Since vehicular independent accidents out of traffic accidents have been rapidly increased statistically, the maintenance of roadside equipment and the installation of protective structures, the excellence of which has been proved through in- depth research, are urgently required.

[3] The above protective structures include a guardrail, and an impact absorbing apparatus for roads, which is installed in front of the guardrail.

[4] The guardrail, which is installed at both sides or a central line of a road, partitions the traveling lanes of vehicles, protects a vehicle and passengers in the vehicle when the vehicle is deviated from the road, induces the gentle traveling direction of the vehicle to prevent the generation of following accidents, and prevents damage to the vehicle and injury to passengers in the vehicle. The impact absorbing apparatus is installed in front of a guardrail or a concrete structure, and absorbs impact to the guardrail or the concrete structure when a vehicle collides with the guardrail or the concrete structure.

[5] The above impact absorbing apparatus has a simple structure, in which five to ten tires are bound by a string, and is installed in front of a guardrail or a concrete structure. The impact absorbing apparatus may cause accidents.

[6] That is, since the impact absorbing apparatus is simply installed in front of the guardrail or the concrete structure without fixation, the tires of the impact absorbing apparatus are bounced out when a vehicle collides with the impact absorbing apparatus, thereby obstructing safe driving of other vehicles. Further, even if the impact absorbing apparatus is fixed to the guardrail or the concrete structure, since the material of the tires of the impact absorbing apparatus cannot gradually exhibit impact- absorbing effects, the vehicle collided with the impact absorbing apparatus is bounced out, thereby colliding with other vehicles.

[7] Instead of the above tires and concrete structures, an impact absorbing apparatus for use in vehicle collisions as shown in FIG. 1 has been developed. The impact absorbing apparatus 1 comprises a plurality of extendible link members 3, which are elastically extended and retracted, and are interposed between partitions 2. The extendible link members 3 maintain their extended state by springs (not shown), and guardrails 4 are movably installed at both sides of the extendible link members 3.

[8] The impact absorbing apparatus 1, as shown in FIG. 1, is installed at an input/output port of a road. When a vehicle collides with the impact absorbing apparatus 1 in the direction of the arrow of FIG. 1, the extendible link members 3 are momentarily retracted from the lift to the right, as shown in FIG. 2, thereby absorbing impact applied to the vehicle.

[9] When a large-sized vehicle collides with the impact absorbing apparatus 1, the above impact absorbing apparatus 1 can reduce impact applied to the large-sized vehicle. However, when a small-sized vehicle collides with the impact absorbing apparatus 1, the extendible link members 3 are momentarily retracted and are extended again by the repulsive force of the springs, thereby exerting a fatally negative influence on a vehicle body or passengers in the vehicle.

[10] Accordingly, the applicant of the present invention has invented a winder for preventing a vehicle collision (disclosed by Korean Utility Model Registration No. 357788), which maintains the retracted state of an impact absorbing apparatus due to the vehicle collision so as to prevent secondary damage to a vehicle body and injury to passengers in the vehicle, as shown in FIGS. 3 to 5.

[11] As shown in FIGS. 3 to 5, the winder disclosed by the above Utility Model comprises wires 10 for maintaining the tension of the impact absorbing apparatus 1 in the longitudinal direction, and winding means 20 for preventing the impact absorbing apparatus 1 from being extended again by rapidly winding wires 10, which sag in proportion to the retraction of the impact absorbing apparatus 1 when the impact absorbing apparatus 1 is retracted in the longitudinal direction due to a vehicle collision.

[12] As shown in FIG. 3, when a vehicle collides with the impact absorbing apparatus 1 in the direction of the arrow, the impact absorbing apparatus 1 is retracted in the direction of the arrow. At this time, the wires 10, which were tightly stretched, sag in proportion to the retracted length of the impact absorbing apparatus 1. Then, the winding means 20 is momentarily operated to rapidly wind the sagged wires 10, thereby maintaining the retracted state of the impact absorbing apparatus 1. After the settlement of the vehicle collision is completed under the condition that the impact absorbing apparatus 1 is retracted, the impact absorbing apparatus 1 must be extended to its original state. Then, the winding means 20 is operated by hand to return the impact absorbing apparatus 1 to its original state, and damaged elements of the impact absorbing apparatus 1 are repaired and installed again.

[13] As shown in FIGS. 4 and 5, the impact absorbing apparatus 1 comprises a plurality of extendible link members 3 and springs 5, thereby having high production costs. Further, since a plurality of bolts 7 are inserted into each of struts 7 to fix the extendible link members 3, the man-hour of the work process of the impact absorbing apparatus 1 is increased.

[14] Further, the applicant of the present invention has invented an impact absorbing apparatus for use in vehicle collisions disclosed by Korean Utility Model Registration Nos. 367001 and 376121. The above impact absorbing apparatus comprises a plurality of waste tires, and is retracted to absorb impact when a vehicle collides with the impact absorbing apparatus, thereby solving defects of the conventional impact absorbing apparatus shown in FIGS. 1 and 3. Hereinafter, with reference to FIGS. 6 to 11, the above impact absorbing apparatus will be described.

[15] As shown in FlG. 6, such an impact absorbing apparatus 30 comprises buffering waste tire members 40, each of which includes a plurality of stacked waste tires 41 provided with openings 41a formed through the outer cylindrical surface thereof for passing air when the waste tires 41 are compressed or expanded, a plurality of partitions 50 installed to fix the waste tire members 40 thereto and moving in the compressed direction of the waste tire members 40 when a vehicle collides with the impact absorbing apparatus 30, and expansion preventing means 60 for preventing the waste tire members 40 from being expanded when the vehicle collides with the impact absorbing apparatus 30.

[16] The expansion preventing means 60, as shown in FIGS. 7 and 8, comprises a ladder

61 installed in the longitudinal direction of the waste tire members 40 and provided with a plurality of locking holes 61a, anchors 62 installed on the lower end of the frontmost partition 50, with which the vehicle directly collides, and locked into the locking holes 61a to prevent the compressed waste tire members 40 from being expanded, and a slack adjuster 64 for adjusting the tension of a wire 63 to expand the compressed waste tire members 40 by hand.

[17] As shown in FlG. 8, the intervals between the locking holes 61a formed through the ladder 61 of the expansion preventing means 60 are decreased from the frontmost partition 50 to the slack adjuster 64. Thereby, when the vehicle collides with the impact absorbing apparatus 30, the anchors 62 are firmly locked into the locking holes 61a.

[18] As shown in FlG. 9, the anchors 62 are elastically operated by a spring 62a so that the operating range of the anchors 62 is adjusted by bolts 62b and nuts 62c. Support guiders 65 for moving the partition 50 along rails 70 are fixed to the lower end of the partition 50 through brackets 66a using bolts 67a and nuts 67b. The anchors 62 are fixed to the lower end of the partition 50 through brackets 66b using bolts 68a and nuts 68b so that the anchors 62 are elastically operated by the spring 62a.

[19] Accordingly, when the vehicle collides with the impact absorbing apparatus 30 in the direction of the arrow of FlG. 7 under the condition that the impact absorbing apparatus 30 is installed at an input/output port of a road as shown in FlG. 6, the waste tires 41 of the waste tire members 40 are contracted. Then, air is discharged from the waste tires 41 to the outside through the openings 41a, and rounded portions (outer surfaces) of the anchors 62 installed on the lower end of the frontmost partition 50 passes an inclined portion of the hole 61a and reaches the next hole 61a, thereby successively passing the holes 61a. The above procedure is determined by the collision force of the vehicle (with reference to FIGS. 10 and 11).

[20] When the vehicle collides with the impact absorbing apparatus 30 and is stopped, the inner surfaces of the anchors 62 are locked into the corresponding hole 61a. Since the state of the ladder 61 is maintained by the wire 63 of the slack adjustor 64, the contracted state of the waste tire members 40 as shown in FlG. 7 is maintained. Thereby, it is possible to prevent the secondary expansion of the waste tire members 40, thus protecting the body of the vehicle from damage and ensuring passenger safety.

[21] When the settlement of the vehicle collision under the condition as shown in FlG. 7 is completed, the contracted waste tire members 40 must be expanded as shown in FlG. 6. The slack adjustor 64 is rotated by hand to unwind the wire 63, and air enters into the waste tires 41 through the holes 41a, thereby gradually expanding the contracted waste tire members 40 to its earlier state.

[22] The impact absorbing apparatus 30 shown in FIGS. 6 to 11 has the following problems.

[23] First, when the frontmost partition 50 moves forward due to a vehicle collision, the support guiders 65 cannot smoothly move on the rails 70 and are broken.

[24] Second, as shown in FlG. 10, the anchors 62 are elastically supported by the spring

62a against the ground under the hole 61a of the ladder 61, and are stuck in the ground under the hole 61a when the vehicle collides with the impact absorbing apparatus 30, thereby malfunctioning.

[25] Third, when the slack adjustor 64 is broken or damaged due to the vehicle collision, as shown in FlG. 7, the ladder 61 momentarily moves in the direction opposite to the arrow by the restoring force of the waste tire members 40, thereby causing secondary damage to the vehicle and the passengers of the vehicle. Disclosure of Invention Technical Problem

[26] Therefore, the present invention has been made in view of the above problems, and it is an object of the present invention to provide an impact absorbing apparatus for use in vehicle collisions, in which, when a vehicle collides with the impact absorbing apparatus, a plurality of partitions easily move forward so that support guiders are not broken, anchors are not stuck in the ground but are firmly locked into holes of a ladder, and contracted waste tire members are maintained even when a slack adjuster is damaged, thereby efficiently preventing the secondary collision caused by the opposite-directional movement of the ladder. Technical Solution

[27] In accordance with an aspect of the present invention, the above and other objects can be accomplished by the provision of an impact absorbing apparatus for use in vehicle collisions, which has buffering waste tire members having a plurality of stacked waste tires and openings formed through the outer cylindrical surfaces of the waste tires for passing air when the waste tires are contracted and expanded, a plurality of partitions, to which the waste tire members are fixed, moving along rails in the contracted direction of the waste tire members when a vehicle collides with the impact absorbing apparatus, a ladder installed between the rails under the partitions and provided with a plurality of locking holes, and a slack adjustor operated by hand for restoring the contracted waste tire members to their initial state after the vehicle collision, comprising: rollers axially installed on support guiders welded to lower ends of the partitions for reducing frictional force between the support guiders and the rails to easily move the partitions forward when the vehicle collides with the impact absorbing apparatus; locking anchors installed on the lower end of the frontmost partition, with which the vehicle directly collides, selectively locked into the locking holes of the ladder, and elastically operated so as not to expand the contracted waste tire members when the vehicle collides with the impact absorbing apparatus; and a stopper for preventing the movement of the ladder so that the contracted state of the waste tire members is maintained even if the slack adjustor is damaged when the vehicle collides with the impact absorbing apparatus.

[28] Preferably, the locking anchors are installed on the lower end of the frontmost partition, with which a vehicle directly collides. Further, preferably, the locking anchors are installed on the lower ends of the frontmost partition and another partition close thereto, i.e., the two front partitions, so that the malfunction of the anchors generated by the vehicle collision is prevented.

[29] Preferably, each of the locking anchors comprises a locking plane locked into the rear portion of the hole of the ladder when the vehicle collides with the impact absorbing apparatus, and an inclined plane for easily passing the front portion of the hole of the ladder. Thereby, it is possible to solve the sticking of the anchors into the hole of the ladder when the vehicle collision occurs.

[30] Preferably, the stopper is fixed to the ladder for preventing the movement of the ladder before the vehicle collision is settled, and is separated from the ladder for restoring the contracted waste tire members to their initial state by operating the slack adjuster after the vehicle collision is settled.

Advantageous Effects

[31] In the impact absorbing apparatus of the present invention, when a vehicle collides with the impact absorbing apparatus, the front partitions easily move forward so that support guiders are not broken, anchors are not stuck in the ground but are firmly locked into holes of a ladder, and contracted waste tire members are maintained even when a slack adjustor is damaged, thereby efficiently preventing the secondary collision caused by the opposite-directional movement of the ladder.

Brief Description of the Drawings [32] The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: [33] FlG. 1 is a perspective view of a conventional impact absorbing apparatus for use in vehicle collisions, which uses extendible link members made of metal; [34] FlG. 2 is a schematic view illustrating a collision state of the impact absorbing apparatus; [35] FlG. 3 is a perspective view of another conventional impact absorbing apparatus for use in vehicle collisions, which comprises a winder; [36] FlG. 4 is a partially exploded perspective view of the impact absorbing apparatus shown in FlG. 3; [37] FlG. 5 is a partially enlarged perspective view of the impact absorbing apparatus shown in FlG. 3; [38] FIGS. 6 and 7 are perspective views respectively illustrating a pre-collision state and a post-collision state of yet another conventional impact absorbing apparatus for use in vehicle collisions, which uses waste tires; [39] FlG. 8 is a perspective view illustrating essential elements of the impact absorbing apparatus shown in FIGS. 6 and 7; [40] FlG. 9 is an exploded perspective view of expansion preventing means of the impact absorbing apparatus shown in FlG. 8; [41] FIGS. 10 and 11 are perspective views respectively illustrating a preoperation state and a post-operation state of anchors of the expansion preventing means shown in FlG.

9; [42] FlG. 12 is a perspective view of an installation state of an impact absorbing apparatus for use in vehicle collisions in accordance with the present invention, before a vehicle collision occurs; [43] FIGS. 13 and 14 are exploded and assembled perspective views of expansion preventing means used in the impact absorbing apparatus of the present invention; [44] FlG. 15 is a perspective view illustrating essential elements of the impact absorbing apparatus of the present invention shown in FlG. 12;

[45] FlG. 16 is a perspective view illustrating the assembly of two waste tire blocks;

[46] FlG. 17 is a schematic sectional view of an initial installation state of the impact absorbing apparatus shown in FlG. 12;

[47] FlG. 18 is a partially enlarged sectional view of FlG. 17;

[48] FlG. 19 is a perspective view of a post-collision state of the impact absorbing apparatus of the present invention; [49] FlG. 20 is a perspective view of the assembly of two waste tires after a vehicle collision occurs; [50] FlG. 21 is a schematic sectional view of the post-collision state of the impact absorbing apparatus shown in FlG. 19;

[51] FlG. 22 is a partially enlarged sectional view of FlG. 21 ;

[52] FlG. 23 is a perspective view illustrating a locked state of a stopper, serving as expansion preventing means, shown in FlG. 21; [53] FlG. 24 is a perspective view illustrating an operating state of the stopper when a vehicle collision occurs; [54] FlG. 25 is a perspective view illustrating another embodiment of the expansion preventing means applied to the present invention; and [55] FlG. 26 is a sectional view illustrating a contact state between a support guider and a rail of the expansion preventing means, as shown in FlG. 25.

Best Mode for Carrying Out the Invention [56] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. [57] FlG. 12 is a perspective view of an installation state of an impact absorbing apparatus 100 for use in vehicle collisions in accordance with the present invention, before a vehicle collision occurs. Some elements in FlG. 12, which are substantially the same as those of FlG. 6, are denoted by the same reference numerals, and a detailed description thereof will thus be omitted because it is considered to be unnecessary. The impact absorbing apparatus 100 of the present invention shown in FlG. 12 comprises waste tire members 40 respectively consisting of four, four, three, and three waste tires 41 for efficiently absorbing impact when the vehicle collision occurs as shown in FlG. 18. However, the number of the waste tires 41 may be varied according to conditions of a road, on which the impact absorbing apparatus 100 is installed.

[58] FIGS. 13 and 14 are exploded and assembled perspective views of expansion preventing means used in the impact absorbing apparatus 100 of the present invention. The expansion preventing means of FIGS. 13 and 14 are identical with the conventional expansion preventing means of FlG. 9 except for anchors and support guiders.

[59] As shown in FlG. 13, support guiders 110 are fixed to both sides of the lower end of each of plural partitions 50 by welding. Rollers 120 contacting upper surfaces of rails 70 for reducing the frictional force between the support guiders 110 and the rails 70 are inserted into axial holes 110a of the support guiders 110, and are fixed by C-rings 121 so that the rollers 120 are not separated from the support guiders 110. When a vehicle collides with the impact absorbing apparatus 100, the partitions 50 easily move forward by the rollers 120 installed on the support guiders 110 installed on the lower ends of the partitions 50.

[60] Two anchors 130 are installed under each of the partitions 50. The anchors 130 are fixed to a bracket 133, which is fixed to the partition 50 by bolts 131 and nuts 132, by a shaft 134, and are elastically supported by springs 135. As shown in FlG. 13, locking planes 130a are formed on the lower ends of the left sides of the anchors 130, and inclined planes 130b of the anchors 130 allow the anchors 130 to pass over the front portions of the holes 61a of the ladder 61. When the vehicle collides with the impact absorbing apparatus 100, the locking planes 130a of the anchors 130 are selectively locked into the holes 61a of the ladder 61, thereby preventing the contracted waste tire members 40 from being expanded.

[61] FlG. 15 is a perspective view illustrating essential elements of the impact absorbing apparatus 100 of the present invention shown in FlG. 12. Some elements in FlG. 15, which are substantially the same as those of FlG. 8, are denoted by the same reference numerals, and a detailed description thereof will thus be omitted because it is considered to be unnecessary.

[62] A stopper 140 shown in FlG. 15 serves to prevent the movement of the ladder 61 so that the contracted state of the waste tire members 40 is maintained even when the slack adjustor 64 is broken due to the vehicle collision. The stopper 140 is fixed to an anchor bolt 141 using a nut 142 to prevent the movement of the ladder 61, before the settlement of an accident caused by the vehicle collision is completed. Here, a front end 140a of the stopper 140 supports the end of the ladder 61.

[63] Accordingly, in order to return the waste tire members 40, contracted after the vehicle collision, to their initial state, the nut 142 is loosened, the stopper 140 is separated from the ladder 61, and the slack adjuster 64 is manually operated to loosen the wire 63. Preferably, the rails 70 of FlG. 15 are installed on a road by an appropriate method, for example by fixing the rails 70 to an asphalt pavement using anchor bolts, or by removing the asphalt pavement and fixing the rail 70 to the road by a concrete work using bolts.

[64] FlG. 16 illustrates the sequential connection of four waste tires 41 onto the partition

50, assembled as shown in FIGS. 13 and 14. The connection method of the waste tires 41 and the formation of the openings 41a are disclosed by Korean Utility Model Registration Nos. 367001 and 376121 invented by the applicant of the present invention, and a detailed description thereof will thus be omitted.

[65] Hereinafter, the operation of the impact absorbing apparatus of the present invention will be described.

[66] As shown in FlG. 15, the ladder 61 is located between the rails 70 guiding the partitions 50, and the wire 63 unwound from a roller 64a of the slack adjustor 64 is fixed to one end of the ladder 61. When the impact absorbing apparatus 100 of the present invention is installed at an input/output port of a road, the state of the impact absorbing apparatus 100, as shown in FlG. 12, is maintained.

[67] Accordingly, when a vehicle collides with the impact absorbing apparatus 100 in the direction of the arrow under the condition that the import absorbing apparatus 100 is installed at the input/output port of the road, as shown in FIGS. 12, 17 and 18, the waste tire members 40 are contracted, as shown in FIGS. 19 to 22. In this case, as shown in FlG. 22, air in the waste tires 40 is discharged to the outside through the openings 41a, and the inclined planes 130b of the anchors 130 installed on the lower ends of the leftmost and the next partitions 50 pass by the corresponding holes 61a and reach the next holes 61a, thereby sequentially passing by the holes 61a. The above procedure is determined by the collision force of the vehicle (with reference to FIGS. 23 and 24).

[68] When the vehicle collides with the impact absorbing apparatus 100 and is stopped, the locking planes 130a of the anchors 130 are locked into the corresponding holes 61a, and the contracted state of the waste tire members 40 is maintained as shown in FIGS. 21 and 22, thereby preventing the secondary expansion of the waste tire members 40 (expansion of the waste tire members 40 after the contraction), thus preventing damage to the body of the vehicle and injury to passengers in the vehicle. [69] Further, since the stopper 140 supports the end of the ladder 61, even when the slack adjuster 64 malfunctions, the ladder 61 does not move in the opposite direction of the collision (in the direction for expanding the waste tire members 40), thereby securely preventing the secondary expansion of the waste tire members 40.

[70] When the settlement of the vehicle collision is completed under the condition that the impact absorbing apparatus 100 of the present invention is in the state, as shown in FIGS. 21 and 22, due to the vehicle collision, the contracted waste tire members 40 must be expanded, as shown in FIGS. 12 and 17. That is, the nut 142 is loosened so that the stopper 140 is separated from the ladder 61, and the slack adjuster 64 is operated by hand so that the wire 63 is unwound from the roller 64a, thereby gradually expanding the contracted waste tire members 40 and returning the waste tire members 40 to their initial state.

[71] FIG. 25 is a perspective view illustrating another embodiment of the expansion preventing means applied to the present invention. When the partitions 50 moves forward due to the vehicle collision, the inner surfaces of the support guiders 110 contact the side surfaces of the upper portion of the rail 70. Thus, the partitions 50 can move more smoothly.

[72] That is, tap holes 110b are formed through the support guider 110, and a wrench bolt 150, a spring 151, and a ball 152 are inserted into each of the tap holes 110b. The balls 152 contact the side surfaces of the upper portion of the rail 70, the springs 151 provides pressing force to the balls 152, and the wrench bolts 150 adjust the pressing force of the springs 151.

[73] Accordingly, when a vehicle collides with the impact absorbing apparatus 100, the balls 152 contact the side surfaces of the upper portion of the rail 70 by the springs 151. Thereby, the support guiders 110 can move forward along the rail 7 without heeling to one side. Industrial Applicability

[74] As described above, the present invention provides an impact absorbing apparatus in vehicle collisions, in which, when a vehicle collides with the impact absorbing apparatus, partitions easily move forward so that support guiders are not broken, anchors are not stuck in the ground but are firmly locked into holes of a ladder, and contracted waste tire members are not restored to their initial state even when a slack adjuster is damaged, thereby efficiently preventing the secondary collision caused by the opposite-directional movement of the ladder.

[75] Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

[76] For example, the number of waste tires constituting each of the waste tire members is not limited to four, and may be variously modified according to road conditions. Further, the number of the anchors may be variously modified. Although the embodiment of the present invention describes springs, which are respectively provided to the anchors for supplying elastic force to the corresponding anchors, one spring may supply elastic force to two anchors. Rollers axially installed on the support guiders may be replaced with rolling means, such as bearings.

Claims

[1] An impact absorbing apparatus for use in vehicle collisions, which has buffering waste tire members having a plurality of stacked waste tires and openings formed through the outer cylindrical surfaces of the waste tires for passing air when the waste tires are contracted and expanded, a plurality of partitions, to which the waste tire members are fixed, moving along rails in the contracted direction of the waste tire members when a vehicle collides with the impact absorbing apparatus, a ladder installed between the rails under the partitions and provided with a plurality of locking holes, and a slack adjuster operated by hand for restoring the contracted waste tire members to their initial state after the vehicle collision, comprising: rollers axially installed on support guiders welded to lower ends of the partitions for reducing frictional force between the support guiders and the rails to easily move the partitions forward when the vehicle collides with the impact absorbing apparatus; locking anchors installed on the lower end of the frontmost partition, with which the vehicle directly collides, selectively locked into the locking holes of the ladder, and elastically operated so as not to expand the contracted waste tire members when the vehicle collides with the impact absorbing apparatus; and a stopper for preventing the movement of the ladder so that the contracted state of the waste tire members is maintained even if the slack adjustor is damaged when the vehicle collides with the impact absorbing apparatus.

[2] The impact absorbing apparatus as set forth in claim 1, wherein the locking anchors are installed on the lower ends of at least two partitions located close to the direction in which the vehicle collides with the impact absorbing apparatus.

[3] The impact absorbing apparatus as set forth in claim 2, wherein each of the locking anchors comprises a locking plane locked into the rear portions of the holes of the ladder when the vehicle collides with the impact absorbing apparatus, and an inclined plane for easily passing the front portions of the holes of the ladder.

[4] The impact absorbing apparatus as set forth in claim 1, wherein the stopper is fixed to the ladder for preventing the movement of the ladder before the vehicle collision is settled, and is separated from the ladder for restoring the contracted waste tire members to their initial state by operating the slack adjustor after the vehicle collision is settled.

[5] The impact absorbing apparatus as set forth in claim 1, wherein each of the support guiders comprises balls contacting the side surfaces of the upper portions of the rails for preventing the support guider from heeling to one side, springs providing pressing force to the balls, and wrench bolts for adjusting the pressing force of the springs.