KR101705533B1 - Automatic column collapse apparatus by impact load - Google Patents

Abstract

The present invention relates to an automatic column collapsing apparatus by an impact load triggering, by an impact load, an operation of an impact absorbing device installed in a seat for protecting a passenger, comprising: a fixed column; a mobile column installed in an upper corner of a seat, and coupled to be slidable upwards and downwards on an upper portion of the fixed column; and a column fixing plate having one side attached to a circumferential surface of the mobile column such that the side protrudes from the circumferential surface of the mobile column in a direction of being crossed with the fixed column, and thereby restraining downward movement of the mobile column, wherein in case of an impact load being applied thereto, the side attached to the mobile column is fractured such that the column fixing plate allows the mobile column to move downwards. Thus, the present invention may safely support a load in general without increasing a diameter of an existing shear pin, and in a case of an impact load being applied, may be automatically fractured to reliably trigger an operation of a shock absorber.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an automatic column collapse apparatus,

The present invention relates to an automatic pillar collapsing apparatus serving as a starter which triggers the operation of a shock absorber mounted on a seat for occupant protection.

Examples of collapsing or breaking the column, which is a mechanical element inside air, land and sea transport, are as follows. When the helicopter collides with the ground or an explosive device (IED, Improvised Explosive Device) explodes in the lower part of the armored vehicle, it can not effectively dampen the excessive load delivered to the occupant seated in the seat, causing the occupant to suffer a fatal load, It can lead to death.

Therefore, in some cases, including a case in which a shock absorber is mounted, a shock absorber (shock absorber) is installed in the seat for occupant protection in some cases, Absorber) is additionally installed, and an automatic pillar collapse apparatus serving as a starter which triggers the operation of the shock absorber under a constant impact load condition is required.

FIG. 1 is a conceptual view showing an automatic column collapse apparatus using a conventional shear pin.

As shown in Fig. 1, when the impact load is applied to the movable column 3 and the shear pin 5 is broken, the movable column 3 descends relative to the fixed column 1, The operation of the separate shock absorber mounted on the vehicle is triggered.

In order to intentionally and effectively break the shear pin 5 under such an impact load condition, it is necessary to design the shear pin 5 considering the diameter and strength of the shear pin 5.

The load transmitted through the column extends over the entire cross-sectional area of the column. The load distributed in the movable column 3 in Fig. 1 moves to the fixed column 1 through the shear pin and the load flow in the shear pin 5 Is locally reduced and the load on the shearing pin 5 is locally increased, so that a relatively excessive load acts on the shearing pin even during normal operation, thereby shortening the life of the shearing pin earlier than expected. In this case, the original purpose of the shear pin 5 may not be achieved.

It is necessary to increase the cross-sectional area of the front end pin 5 mounted between the fixed column 1 and the movable column 3 in order to positively prevent the local reduction phenomenon of the load flow.

Specifically, when the diameter of the shearing pin 5 is increased to reduce the load acting on the shearing pin 5 in normal condition, the weight of the shearing pin 5 is increased, and the impact of the shearing pin 5 There is a high possibility that the operation of the automatic pillar collapse apparatus is delayed as the time required for the fracture of the shear pin 5 is relatively extended in a situation where a load is applied.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an automatic pillar capable of supporting a stable load during normal operation without increasing the diameter of a conventional shear pin and automatically collapsing under the action of an impact load, Collapse device.

In order to accomplish the object of the present invention, an automatic pillar collapsing apparatus according to the present invention comprises: a fixed post, for triggering an operation of a shock absorber mounted on a seat by an impact load for protecting an occupant; A moving pillar provided at a corner of a top plate of the seat and slidably coupled to an upper portion of the fixed pillar in a vertical direction; And one side surface is attached to a circumferential surface of the moving column so as to protrude in a direction intersecting with the fixed column at a circumferential surface of the moving column to restrict downward movement of the moving column, And a column fixing plate for allowing downward movement of the movable column as the attached side is broken.

According to an embodiment of the present invention, the column fixing plate may be attached to a flat surface or a straight portion of the circumferential surface of the movable column.

According to an embodiment of the present invention, the upper surface and the lower surface of the column fixing plate can be fixed by butt welding at intervals along the circumferential surface of the moving column.

According to an embodiment of the present invention, the upper surface and the lower surface of the column fixing plate welded to the moving column may have inclined surfaces such that the thickness becomes thinner toward the circumferential surface of the moving column.

According to an embodiment of the present invention, the movable column is inserted and coupled into the fixed column so as to overlap with the circumferential surface of the fixed column, and guide protrusions are inserted between the fixed column and the movable column, The gap between the fixed column and the movable column can be kept constant.

According to an embodiment of the present invention, the apparatus further includes a latch assembly provided on an outer circumferential surface of the fixed column to restrict upward movement of the movable column, wherein the latch assembly is fixed to the other side of the column fixing plate A fixing protrusion; A rotary lever having an upper end coupled to the fixed post in a hinge structure and a lower end rotated up and down; One side of which is hinged to both sides of the rotation lever and the other side of which is rotated up and down to press the column fixing plate to the upper end of the fixing column according to the engagement with the fixing protrusion.

According to one embodiment of the present invention, the latch assembly may be mounted on two surfaces corresponding to the inside of the circumferential surface of the moving post when viewed from above the upper plate of the seat.

According to the present invention configured as described above, in normal operation, the column fixing plate is welded to the circumferential surface of the moving column to stably support the load of the column, and when an impact load acts on the column, the welding portion is automatically broken, Down to trigger the operation of the shock absorber. This improves the disadvantage caused by the shear pin applied to the existing automatic pillar collapsing apparatus and induces stable collapse or breakage, thereby assuring the maximum operation of the shock absorber.

FIG. 1 is a conceptual view showing an automatic column collapse apparatus using a conventional shear pin.
2 is a perspective view showing a state where an automatic pillar collapse apparatus is mounted on a column according to the present invention.
3 is a cross-sectional view of a column on which the automatic column collapse apparatus of Fig. 2 is mounted.
4A is a sectional view taken along the line AA of FIG. 3, FIG. 4A is a front view of the automatic column collapse apparatus according to the present invention, FIG. 4B is a view showing a state where the automatic column collapsing apparatus of FIG. FIG. 4C shows a state in which the column fixing plate of FIG. 4B is completely removed. FIG.
5 is a perspective view showing a latch assembly for restricting upward movement of the column fixing plate according to the present invention.

Hereinafter, an automatic pillar collapse apparatus according to the present invention will be described in detail with reference to the drawings. In the present specification, the same or similar reference numerals are given to different embodiments in the same or similar configurations. As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.

FIG. 2 is a perspective view showing a state where an automatic pillar collapse apparatus is mounted on a column according to the present invention, and FIG. 3 is a sectional view of a column on which the automatic column collapse apparatus of FIG. 2 is mounted.

Referring to FIG. 2, a plurality of, for example, four pillars are provided at the lower portion of the seat top plate 10 on which a passenger can sit, and the seat top plate 10 is supported.

Each column is a separable column that can be separated from each other by making one set (SET) of the movable column 13 and the fixed column 11.

The fixing post 11 can be fixed to the inner bottom of the transportation means such as a helicopter.

The movable column 13 is fixed to the lower corner of the seat top plate 10. The movable column 13 is slidably coupled to the upper portion of the fixed column 11 so that the seat top plate 10 and the movable column 13 descend when an instantaneous and very large impact load occurs in an accident situation Thereby absorbing the impact load transmitted to the occupant.

An automatic pillar collapse apparatus (100) is provided between the movable column (13) and the fixed column (11) to trigger the operation of the shock absorber under a constant impact load condition. The shock absorber may be separately mounted inside or outside the pillar.

The automatic pillar collapsing apparatus 100 is provided with a pillar fixing plate 110 for supporting a load during normal operation and inducing stable collapse or breakage of the pillar collapse apparatus 100 when an impact load is applied.

3, the column fixing plate 110 is mounted on the outer peripheral surface of the moving column 13 by butt welding.

The movable column 13 has a smaller sectional area than the fixed column 11 so that the lower end of the movable column 13 is surrounded by the inner peripheral surface of the fixed column 11, Is inserted into the fixed column (11) and is slidably coupled in the vertical direction.

The column fixing plate 110 protrudes from the outer circumferential surface of the moving column 13 over the upper end of the fixing column 11 and the column fixing plate 110 is arranged to overlap with the upper end of the fixing column 11 in the vertical direction. Thereby, it is possible to support the loads of the occupant, the seat top plate 10 and the moving post 13 in normal operation.

The width of the column fixing plate 110 may be the sum of the thickness of the fixing column 11 and the clearance between the fixing column 11 and the moving column 13. It is preferable that the pillar fixing plate 110 does not deviate from the outer peripheral surface of the fixing post 11. This is because, when the pillar fixing plate 110 protrudes out of the outer circumferential surface of the fixing post 11, the moving passage around the seat is obstructed and the moving space of the occupant may be narrowed or the occupant may be damaged. Furthermore, there is a risk that the column fixing plate 110 may malfunction even when interfering with other structures.

The length of the column fixing plate 110 may be smaller than the circumferential length of any one of the four circumferential surfaces of the moving column 13. [ For example, the column fixing plate 110 preferably has a length corresponding to a linear portion except a round portion of a corner on one circumferential surface of the moving column 13. [ This is because when the pillar fixing plate 110 extends to the corner of the moving pillar 13, when the welding pillar 111 of the pillar fixing plate 110 is broken due to an impact load and the moving pillar 13 moves downward This is because they are restricted by exercise due to excessive resistance. Therefore, the column fixing plate 110 has a length corresponding to the straight portion of one circumferential surface of the moving column 13, and is attached at four places on the circumferential surfaces of the moving columns 13 in the four directions.

The column fixing plate 110 is horizontally attached to the outer circumferential surface of the moving column 13 and is disposed so as to be caught by the thickness of the upper end of the fixing column 11 so that the moving column 13 inserted into the fixing column 11 13 can be limited. In other words, the starting fixed plate restricts the downward movement of the movable column 13. [

The column fixing plate 110 is fixed by intermittent welding to the circumferential surface of the movable column 13 in order to ensure collapse and fall in the moving direction during the impact load operation. Here, the intermittent welding means that the welding portions 111 of the column fixing plate 110 are not welded continuously along the linear length of the column fixing plate 110 and the moving column 13 but are spaced apart at regular intervals.

If the column fixing plate 110 is continuously welded along the length of the plate, it is possible to increase the load bearing capacity of the moving column 13, but it is difficult to ensure collapse when an impact load greater than a certain level is applied. Therefore, it is preferable that the column fixing plate 110 is fixed by intermittent welding.

At this time, the welding spot per one of the pillar fixing plates 110 during the intermittent welding may vary depending on the design conditions of the impact load, the size of the cross-sectional area of the column, and the like. In the embodiment shown in Fig. 3, there are two welds per one post fixture plate 110, and both ends of the post fixture plate 110 can be welded to predetermined lengths.

4A is a sectional view taken along the line AA of FIG. 3, FIG. 4A is a front view of the automatic column collapse apparatus 100 according to the present invention, and FIG. 4B is a sectional view of the automatic column collapse apparatus 100 of FIG. FIG. 4C shows a state in which the column fixing plate 110 of FIG. 4B is completely removed. FIG. 4C shows a state in which the column fixing plate 110 is separated from the moving column 13.

5 is a perspective view showing a latch assembly 120 that restricts upward movement of the column fixing plate 110 according to the present invention.

Referring to FIG. 4A, the column fixing plate 110 is welded both above and below the column fixing plate 110 for stable adhesion with the moving column 13. FIG. The upper surface and the lower surface of the column fixing plate 110 have inclined surfaces 112 that become thinner in the direction closer to the movable column 13 so as to easily adhere to the circumferential surface of the moving column 13. [

The moving column 13 is restricted in its downward movement by the column fixing plate 110 welded to its four sides. However, the pillar fastening plate 110 does not limit the upward movement of the moving pillar 13.

A latch assembly 120 (LATCH ASSEMBLY) is provided to limit the upward movement of the movable column 13. [

The latch assembly 120 may be provided on the outer circumferential surface of the fixing post 11.

The latch assembly 120 may include a fixing protrusion 121a, a rotation lever 123, a locking rod 124, and the like.

The fixing protrusion 121a is fixed to the opposite side of the welding portion 111 of the column fixing plate 110. [ The upper bracket 121 may be provided to cover the upper surface of the column fixing plate 110 and the opposite side of the welding portion 111 to fix the column fixing plate 110. [ One surface of the upper bracket 121 covers the upper surface of the pillar fixing plate 110 and the other surface of the upper bracket 121 covers the upper surface of the pillar fixing plate 110. [ So as to cover the outer surface. The upper bracket 121 may be fixed to the pillar fixing plate 110 by a fastening member such as a screw. The fixing protrusion 121a may be fixed to the other surface of the upper bracket 121 and fixed to the outer surface of the column fixing plate 110. [ The fixing protrusions 121a are provided to press the column fixing plate 110 downward, that is, to press the upper end of the fixing column 11 to limit upward movement of the column fixing plate 110. [ The fixing protrusion 121a may protrude from the other surface of the upper bracket 121 and may have a hook shape that opens upward.

The rotation lever 123 is mounted on the circumferential surface of the fixing post 11 by the lower bracket 122. The lower bracket 122 is fixed close to the lower portion of the upper bracket 121 and perpendicularly to the outer peripheral surface of the fixing post 11. The lower bracket 122 can be fixed to the outer peripheral surface of the fixing post 11 by a fastening member such as a screw or the like. The upper end of the rotation lever 123 is hinged to the lower bracket 122 by a hinge 123a and the lower end of the rotation lever 123 is formed to be inclined outwardly with respect to the vertical plane of the column, ), And can be rotated by pushing it downward. Here, the lower bracket 122 is provided with a locking device, and can be locked or unlocked according to the rotation direction of the rotation lever 123. For example, when the rotary lever 123 is rotated downward, it is locked, and when it is rotated upward, it is released.

The hooking rod 124 may be formed in a shape of a "∩" -shaped shape with one side opened and the other closed, both ends of the hooking rod 124 are inserted into both sides of the rotating lever 123 with a hinge structure, The clogged middle portion of the rod 124 can be rotated up and down with respect to the rotary lever 123 about the hinge. The intermediate portion of the latching rod 124 is capable of pressing and fixing the column fixing plate 110 according to the engagement of the fixing protrusion 121a with the fixing protrusion 121a.

When the rotary lever 123 is lifted upward, the lower end of the rotary lever 123 rotates upward about the hinge 123a at the upper end of the rotary lever 123 , The engagement rods 124 hinged to both sides of the rotation lever 123 are released from the fixing projections 121a.

When the rotation lever 123 is rotated in the downward direction with the latching rod 124 being caught in the fixing protrusion 121a, the latching rod 124 is moved to the fixing protrusion 121a The pillar fixing plate 110 can be pressed and fixed to the upper end of the fixing post 11 by pulling the pillar 121a downward.

According to the latch assembly 120, when the latching rod 124 is not loosened at the fixing protrusion 121a and the welded portion 111 of the column fixing plate 110 is broken under an impact load condition, Assembly 120 must be configured.

Further, in order to prevent malfunction by the occupant or the operator, the positions where the latch assemblies 120 are installed on the four pillars are not mounted on all four circumferential surfaces of the pillars, but the positions of the four pillars It is mounted on only two sides facing the center. For example, it is preferable that the latch assembly 120 is installed on a circumferential surface facing each other.

If the latch assembly 120 is installed on the outer circumferential surface of each column, a part of the occupant or the like may be caught by the latch assembly 120, thereby causing the latch assembly 120 to malfunction or break.

A guide protrusion 130 is provided between the fixed post 11 and the movable post 13 in order to maintain a constant distance between the fixed post 11 and the movable post 13 when the movable post 13 moves up and down . The guide protrusions 130 are formed on at least two circumferential surfaces of the four sides of the column. At least two circumferential surfaces on which the guide protrusions 130 are provided may be surfaces intersecting at right angles to each other or surfaces opposite to each other. In addition, the guide protrusion 130 may be installed on at least two of the circumferential surfaces of the four sides of the column. The guide protrusion 130 may be installed on the movable column 13 or the fixed column 11. In this case, it is possible to secure a minimum interval for the convenience of mounting the movable column 13, and it is possible to prevent the movable column 13 from being deformed due to the fluctuation due to the interval between the fixed column 11 and the movable column 13, It is possible to solve the problem that the convenience of seating at the time of the seat is deteriorated, and furthermore, early breakage of the seat or the column can be caused.

Therefore, the automatic column collapse apparatus 100 of the present invention can be applied to a separate column separating into a fixed column 11 and a movable column 13, and is mounted to four straight portions around the movable column 13 It is possible to prevent the welding portion 111 of the column fixing plate 110 from being restricted by movement due to excessive resistance when the welding portion 111 is broken due to an impact load and moved downward by the column fixing plate 110. [

It is also possible to ensure collapse when the impact load is applied by intermittent welding to fix the column fixing plate 110 to the moving column 13 and to prevent collapse of the latch assembly 120 between the column fixing plate 110 and the fixing column 11. [ The upward movement of the column fixing plate 110 can be restricted.

Further, it is possible to restrict the lateral movement at the lower portion of the movable post 13 by using the guide protrusion 130. [

The automatic column collapse apparatus 100 described above is not limited to the configuration and the method of the embodiments described above, but the embodiments may be modified such that all or a part of the embodiments are selectively combined .

10: Seat top plate
11: Fixed column
13: Moving Column
100: Automatic pillar collapse device
110:
111: welding part
112: slope
120: latch assembly
121: Upper bracket
121a: Fixing projection
122: Lower bracket
123: Rotary lever
124:
130: guide projection

Claims (7)

An automatic pillar collapsing apparatus for triggering an operation of a shock absorber mounted on a seat by an impact load for occupant protection,
Fixed column;
A moving pillar provided at a corner of a top plate of the seat and slidably coupled in a vertical direction in a manner of being inserted into the fixed pillar;
Wherein one side surface is attached to a circumferential surface of the movable column so as to protrude in a direction intersecting with the fixed column at a circumferential surface of the movable column to limit downward movement of the movable column, A column fixing plate for allowing the movable column to move downward as the one side surface is broken; And
And a latch assembly provided on an outer circumferential surface of the fixed column to restrict upward movement of the movable column,
The latch assembly includes:
A fixing protrusion fixed to the other side surface of the column fixing plate;
A rotary lever having an upper end coupled to the fixed post in a hinge structure and a lower end rotated up and down; And
And one end of which is hinged to both sides of the rotation lever and the other end is rotated up and down to press the column fixing plate against the upper end of the fixing column according to the engagement with the fixing protrusion. The method according to claim 1,
Wherein the column fixing plate is attached to a flat surface or a straight portion of a circumferential surface of the moving column. The method according to claim 1,
Wherein an upper surface and a lower surface of the column fixing plate are fixed by butt welding with an interval along the peripheral surface of the moving column. The method of claim 3,
Wherein an upper surface and a lower surface of the column fixing plate welded to the moving column each have an inclined surface so as to be thinner in a direction closer to the circumferential surface of the moving column. The method according to claim 1,
Wherein a guide projection is inserted between the fixed column and the movable column to maintain a constant distance between the fixed column and the movable column. delete The method according to claim 1,
Wherein the movable column is a square column,
Wherein the latch assembly is mounted on two surfaces corresponding to the inside of the circumferential surface of the movable column when viewed from above the upper plate of the seat.

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