Impact absorption docking system of wheelchair passenger using a low-floor bus

Abstract

The present invention relates to a shock-absorbing docking system for a wheelchair user using a low-floor bus, and more specifically, to a shock-absorbing docking system for a wheelchair user using a low-floor bus that enables safe docking of the wheelchair by easily connecting and fixing a wheelchair cushioning part provided in the wheelchair to a wheelchair docking part provided in the low-floor bus when a user with limited mobility boards the low-floor bus while seated in the wheelchair. The present invention comprises: a wheelchair (100) equipped with a chair frame (130) that supports a seating cushion seat (110) and a backrest cushion seat (120); a wheelchair cushioning part (200) installed on the chair frame (130) on the backrest cushion seat (120) such that its lower longitudinal side can rotate up and down; and a fixing unit (300) installed on the chair frame (130) to fix the upper longitudinal side of the wheelchair cushioning part (200) that has been rotated upward. It is characterized by comprising a wheelchair docking part (400) that is installed on a partition plate (401) provided inside a low-floor bus and fixes the upper longitudinal side of the downwardly rotated wheelchair cushioning part (200) to restrict the movement of the wheelchair (100).

Description

Technology Field

[0001] The present invention relates to a shock-absorbing docking system for a wheelchair user using a low-floor bus, and more specifically, to a shock-absorbing docking system for a wheelchair user using a low-floor bus that enables safe docking of a wheelchair by easily connecting and securing a wheelchair cushioning unit provided on the wheelchair to a wheelchair docking unit provided on the low-floor bus when a user with limited mobility boards the low-floor bus while seated in a wheelchair. Background Technology

[0003] Recently, as accessibility for the disabled and the elderly using wheelchairs is being improved, many facilities for wheelchair users are being installed in places such as subway stations, parks, bus terminals, restaurants, and government offices.

[0004] In particular, low-floor buses are designed to allow people with mobility impairments to board immediately while seated in their wheelchairs. To board such a bus, a button is operated from the driver's seat to lower a ramp, and the wheelchair rolls its wheels up the ramp. Once on board, the wheelchair moves to the designated wheelchair seat and pulls the rear seatbelt to secure the wheelchair.

[0005] However, not only is it difficult to securely fasten a wheeled wheelchair with only a seat belt in a moving vehicle, but there are also significant problems in ensuring the safety of wheelchair users due to front and rear collisions of low-floor buses or stopping impacts caused by sudden braking and frequent braking operations.

[0006] The technology forming the background of the present invention is disclosed in Korean registered patent No. 10-1280363, which includes an electric / manual combined module for a wheelchair and a wheelchair employing the same. The problem to be solved

[0008] The present invention was conceived in consideration of the aforementioned circumstances, and the objective of the present invention is to provide a shock-absorbing docking system for wheelchair users utilizing low-floor buses, which enhances the safety of wheelchair users by cushioning impacts caused by collisions or forward and backward oscillations occurring during driving, when a user with limited mobility boards a low-floor bus while seated in a wheelchair, by easily connecting and securing a wheelchair cushioning unit provided on the rear side of the wheelchair to a wheelchair docking unit provided on the low-floor bus. means of solving the problem

[0010] The present invention for achieving the above objective comprises: a wheelchair (100) equipped with a chair frame (130) that supports a seating cushion seat (110) and a backrest cushion seat (120); a wheelchair cushioning member (200) installed on the chair frame (130) on the backrest cushion seat (120) such that its lower longitudinal side can rotate up and down; and a fixing unit (300) installed on the chair frame (130) to fix the upper longitudinal side of the wheelchair cushioning member (200) that has been rotated upward. The wheelchair docking unit (400) is configured to restrict the movement of the wheelchair (100) by fixing the upper longitudinal side of the wheelchair buffer unit (200) that is rotated downward and installed on a partition plate (401) provided inside the low-floor bus; and the wheelchair buffer unit (200) is characterized by being configured to include a pair of gas dampers (210) that are rotatably mounted on a damper rotation guide (163) installed on the chair frame (130) with their lower longitudinal sides spaced apart from each other in the width direction of the chair frame (130), and a buffer spring unit (230) that is rotatably mounted on a spring rotation guide (164) installed on the chair frame (130) with its lower longitudinal side positioned between the pair of gas dampers (210). Additionally, the fixing unit (300) comprises a damper bracket (310) installed on the chair frame (130), a damper index plunger (320) which is installed on the damper bracket (310) and configured such that an inlet / outlet stick (323) is inserted into or removed from the interior of the body (321) by rotational operation of a rotating body (322) to be inserted into or removed from a damper fixing member (220) provided on the piston rod (211) side of the gas damper (210), a spring bracket (330) installed on the chair frame (130), and a protruding insertion pin (343) which is inserted into or removed from the interior of the body (341) by rotational operation of a rotational operating member (342) while installed on the spring bracket (330) to a fixed protruding member (251) provided on the cushioning spring part (230). It is configured to include a spring index plunger (340) that is configured to be inserted or removed.Additionally, the cushioning spring part (230) comprises a downward support cap (240) having an axial connector (241) that is axially coupled to a spring rotation guide (164) installed on the chair frame (130), an upward support cap (250) having a fixed protrusion (251) into which a protruding insertion pin (343) of the spring index plunger (340) can be inserted, and a compression spring (260) installed so that both sides in the longitudinal direction are connected to the downward support cap (240) and the upward support cap (250). Additionally, the wheelchair docking unit (400) comprises a damper docking bracket (410) installed on the partition plate (401), a damper docking index plunger (420) installed on the damper docking bracket (410) such that a positioning pin (423) is inserted into or removed from the interior of a mounting body (421) by rotational operation of a rotation lever (422) to be fitted into or removed from a damper fixing member (220) provided on the piston rod (211) side of the gas damper (210), a spring docking bracket (430) installed on the partition plate (401), and a protruding docking pin (443) installed on the spring docking bracket (430) such that a protruding docking pin (443) is inserted into or removed from the interior of a mounting body (441) by rotational operation of an operation lever (442) to be fitted into or removed from the cushioning spring unit (230). It is configured to include a spring docking index plunger (440) that is inserted into or released from a fixed protrusion (251). Additionally, the wheelchair (100) is equipped with a four-point safety belt (500) having a pair of shoulder bands (510) that support the shoulder and chest areas of a user seated in the wheelchair, and a waist band (520) that supports the waist area of ​​a user seated in the wheelchair and is connected to the shoulder bands (510).

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[0017] According to the present invention, a wheelchair cushioning unit provided on the rear side of a wheelchair can be easily connected and fixed to a wheelchair docking unit provided on a low-floor bus, thereby reducing the docking time of the wheelchair and preventing the problem of delays in the operation of the low-floor bus. Furthermore, the wheelchair cushioning unit can cushion the impact caused by a collision accident of the low-floor bus or the forward and backward oscillations that occur while driving, thereby increasing the safety of the wheelchair occupant. Brief explanation of the drawing

[0019] FIG. 1 is a state diagram showing a shock-absorbing docking system for a wheelchair user using a low-floor bus according to the present invention. FIG. 2 is a diagram showing the state in which a wheelchair cushioning part is installed on the wheelchair of the present invention. FIG. 3 is a diagram showing the separated state of a headrest according to the present invention. FIG. 4 is an enlarged view of the state of the chair frame according to the present invention. FIG. 5 is a diagram showing the installation state of a joint reinforcing member according to the present invention. FIG. 6 is a diagram showing the state in which a gas damper according to the present invention is fixed to a chair frame. FIG. 7 is a diagram showing the state in which a cushioning spring part according to the present invention is fixed to a chair frame. FIG. 8 is a diagram showing the installation state of an index plunger for a damper according to the present invention. FIG. 9 is a diagram showing the installation state of an index plunger for a spring according to the present invention. FIG. 10 is a diagram showing the state in which a wheelchair cushioning unit according to the present invention is docked to a wheelchair docking unit. FIG. 11 is an enlarged view showing the docked state between the wheelchair cushioning part and the wheelchair docking part according to the present invention. FIG. 12 is a diagram showing a state in which a support plate is provided in a wheelchair docking part according to the present invention. FIG. 13 is a diagram showing the state in which a four-point safety belt is installed on a wheelchair according to the present invention. FIG. 14 is an enlarged view of a four-point safety belt according to the present invention. FIG. 15 is a diagram showing the state in which the shoulder band hook according to the present invention is hooked onto the upper hook portion. FIG. 16 is a diagram showing the separated state of the upper hanging part according to the present invention. FIG. 17 is a diagram showing the state in which a waistband hook piece installed on a downward hook portion according to the present invention is hooked onto the downward hook portion. Specific details for implementing the invention

[0020] Hereinafter, a shock-absorbing docking system for a wheelchair user in a low-floor bus according to the present invention will be described in detail with reference to the attached drawings. Prior to this, in describing the present invention, if it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the essence of the present invention, such detailed description will be omitted.

[0021] In addition, the terms described below are established considering their functions in the present invention, and these terms may vary depending on the intention or practice of the producer or manufacturer producing the product. Furthermore, the thickness of lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of explanation. The embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

[0022] Furthermore, when it is stated throughout the specification that a part is 'connected' to another part, this includes not only cases where they are 'directly connected,' but also cases where they are 'indirectly connected' with other elements interposed between them. Additionally, the term 'comprising' a component means that, unless specifically stated otherwise, it does not exclude other components but rather allows for the inclusion of additional components.

[0023] Additionally, the term "directional" used in this invention is used in relation to the orientation of the disclosed drawings(s). Since the components of the embodiments of this invention may be positioned in various orientations, the term "directional" is used for illustrative purposes only and is not intended to be limiting.

[0024] FIG. 1 is a state diagram showing a shock-absorbing docking system for a wheelchair occupant using a low-floor bus according to the present invention; FIG. 2 is a state diagram showing a wheelchair cushioning unit installed on a wheelchair according to the present invention; FIG. 3 is a state diagram showing a detached headrest according to the present invention; FIG. 4 is an enlarged state diagram showing the state of a chair frame according to the present invention; FIG. 5 is a state diagram showing the installation state of a joint reinforcement member according to the present invention; FIG. 6 is a state diagram showing a gas damper fixed to the chair frame according to the present invention; FIG. 7 is a state diagram showing a cushioning spring unit fixed to the chair frame according to the present invention; FIG. 8 is a state diagram showing the installation state of an index plunger for a damper according to the present invention; FIG. 9 is a state diagram showing the installation state of an index plunger for a spring according to the present invention; FIG. 10 is a state diagram showing a wheelchair cushioning unit docked to a wheelchair docking unit according to the present invention; FIG. 11 is a state diagram between the wheelchair cushioning unit and the wheelchair docking unit according to the present invention FIG. 12 is a diagram showing a state in which a support plate is provided in the wheelchair docking part according to the present invention, FIG. 13 is a diagram showing a state in which a 4-point safety belt is installed in the wheelchair according to the present invention, FIG. 14 is a diagram showing an enlarged view of the 4-point safety belt according to the present invention, FIG. 15 is a diagram showing a state in which a shoulder band hook according to the present invention is hooked onto the upper hook part, FIG. 16 is a diagram showing a separated state of the upper hook part according to the present invention, and FIG. 17 is a diagram showing a state in which a waist band hook installed on the lower hook part according to the present invention is hooked onto the lower hook part.

[0025] As illustrated in FIGS. 1 to 17 above, the shock-absorbing docking system for a wheelchair user using a low-floor bus according to the present invention comprises a wheelchair (100) equipped with a chair frame (130) that supports a seating cushion seat (110) and a backrest cushion seat (120), a wheelchair cushioning unit (200) installed on the chair frame (130), a fixing unit (300) installed on the chair frame (130) to fix the wheelchair cushioning unit (200), and a wheelchair docking unit (400) installed on a partition plate (401) provided inside the low-floor bus to fix the wheelchair cushioning unit (200).

[0026] That is, the shock-absorbing docking system for a wheelchair user using a low-floor bus according to the present invention allows for safe docking of the wheelchair by easily and simply connecting and fixing the wheelchair cushioning part (200) provided on the wheelchair (100) to the wheelchair docking part (400) provided on the low-floor bus when a user with limited mobility boards the low-floor bus while seated in the wheelchair (100), thereby mitigating the impact caused by a front-to-back collision of the low-floor bus or the front-to-back shaking (shaking caused by frequent brake operation) that occurs while driving, thereby increasing the safety of the user.

[0027] First, the wheelchair (100) is configured to be equipped with driving wheels (101) on both sides in the width direction to enable the wheelchair to move, and a gripping handle (102) to enable an activity assistant to move the wheelchair.

[0028] The above-mentioned seating cushion (110) is designed to allow a user with difficulty walking to sit on it. It is desirable that a shock-absorbing material (not shown), such as styrofoam, be installed inside the seat to provide a comfortable seating position while mitigating driving shocks (shocks transmitted to the user from speed bumps, uneven road surfaces, etc.) that occur during the operation of the low-floor bus.

[0029] The above backrest cushion seat (120) is installed so as to be located on the rear side of the seat cushion seat (110) so that the user can lean their back against it, and it is preferable that a shock absorbing material such as styrofoam be installed inside to protect the user from forward and backward shaking and stopping shock (shock caused by brake operation) that occurs while the low-floor bus is in motion.

[0030] At this time, the backrest cushion seat (120) may be equipped with a headrest (121) that absorbs shock while preventing neck bone damage to the user riding in the wheelchair in the event of a rear-end collision of the vehicle, and the chair frame (130) may be equipped with a headrest fixing part (123) for fitting a fitting stick (122) provided on the headrest.

[0031] The above chair frame (130) forms the overall frame of the wheelchair while allowing the seating cushion seat (110) and the backrest cushion seat (120) to be safely installed. In one embodiment, the chair frame (130) is composed of a seating frame (140) that supports the seating cushion seat (110) and a backrest frame (160) that is installed upright on the rear side of the seating frame (140) to support the backrest cushion seat (120).

[0032] At this time, the lower longitudinal end of the seat frame (140) is welded to the rear side of the backrest frame (160), and the connection is reinforced by an "L" shaped joint reinforcing member (150) that surrounds the connection portion between the seat frame (140) and the backrest frame (160).

[0033] The seating frame (140) may be composed of a seating frame (141) forming a frame and a seating plate (142) connecting both sides in the width direction of the seating frame (141) on which the seating cushion seat (110) is seated and fixed.

[0034] The backrest frame (160) may be composed of a backrest frame (161) that forms the frame of the backrest frame, with the lower longitudinal side fixed to the seat frame (141), a lower plate (162) that connects both sides in the width direction of the backrest frame (161) and is connected and fixed to the lower side of the backrest cushion seat (120), and an upper plate (165) that is spaced upward from the lower plate (162) and has both sides in the longitudinal direction connected to the backrest frame (161) and is connected and fixed to the upper side of the backrest cushion seat (120).

[0035] On both sides of the width direction of the seating cushion seat (110), arm supports (170) for supporting the user's arms may be installed so as to be fixed to the chair frame (130).

[0036] In addition, the wheelchair cushioning part (200) is installed so that its lower longitudinal side can rotate up and down on the chair frame (130) on the backrest cushion seat (120) side. This is so that when not riding a low-floor bus, the wheelchair cushioning part (200) can be folded up and fixed in the direction of the backrest frame (160) so as not to interfere with the activity assistant driving the wheelchair, and after riding a low-floor bus, the wheelchair cushioning part (200) can be rotated downward from the backrest frame (160) and fixed to the wheelchair docking part (400) installed on the low-floor bus, thereby increasing the driving safety and convenience of use of the wheelchair.

[0037] In addition, the wheelchair cushioning unit (200) is fixed to the wheelchair docking unit (400) provided inside the low-floor bus to ensure safety by preventing the wheelchair from slipping while the low-floor bus is in motion, as well as to mitigate the shock transmitted to the user in response to the forward and backward swaying that occurs while driving, and to protect the wheelchair user from accident risks such as the wheelchair being thrown off or flying into the air while mitigating the shock transmitted to the wheelchair in the event of a collision with the low-floor bus.

[0038] As one embodiment, the wheelchair cushioning unit (200) may be configured to include a gas damper (210) which is rotatably mounted on a damper rotation guide (163) installed on the chair frame (130) in the longitudinal direction, and a cushioning spring unit (230) which is rotatably mounted on a spring rotation guide (164) installed on the chair frame (130) in the longitudinal direction.

[0039] That is, the gas damper (210) and the cushioning spring part (230) are hinge-connected to the damper rotation guide (163) and the spring rotation guide (164) installed on the lower plate (162) of the chair frame (130) so as to be rotatable.

[0040] Gas dampers (210) are arranged at a mutually spaced interval in the width direction of a pair of backrest frames (160), and a cushioning spring part (230) is installed to be arranged between the pair of gas dampers.

[0041] In this way, the gas damper (210) and the cushioning spring (230) constituting the wheelchair cushioning unit (200) are hinge-connected to the damper rotation guide (163) and the spring rotation guide (164) so ​​as to rotate up and down. Consequently, when not riding the low-floor bus, the gas damper (210) and the cushioning spring (230) are connected to the fixing unit (300) described later. When riding the low-floor bus, the gas damper (210) and the cushioning spring (230), which are folded toward the chair frame (130), are quickly and securely connected and fixed to the wheelchair docking unit (400) provided inside the low-floor bus, thereby allowing the wheelchair to be safely docked.

[0042] Additionally, the cushioning spring part (230) comprises a downward support cap (240) having an axial connector (241) that is axially coupled to a spring rotation guide (164) installed on the chair frame (130), an upward support cap (250) having a fixed protrusion (251) into which a protruding insertion pin (343) of the spring index plunger (340) can be inserted, and a compression spring (260) installed so that both sides in the longitudinal direction are connected to the downward support cap (240) and the upward support cap (250).

[0043] In this way, by installing upper and lower support caps (240) of a predetermined area on both sides in the longitudinal direction of the compression spring (260), the impact load transmitted to the compression spring can be distributed over a wide area, and by supporting both ends of the compression spring flatly so that the compression spring maintains a vertical state, the buckling phenomenon of the compression spring is prevented.

[0044] In addition, the wheelchair cushioning unit (200), composed of a gas damper (210) and a cushioning spring unit (230), performs a complementary role in which the cushioning spring unit absorbs the shock when shock energy is transmitted to the wheelchair, and the gas damper controls the vibration generated when energy is released from the cushioning spring unit, thereby safely protecting the wheelchair occupant from shock.

[0045] The above fixing unit (300) is installed on the chair frame (130) to fix the upper longitudinal side of the upwardly rotated wheelchair cushioning part (200) by a simple operation method.

[0046] As one embodiment, the fixing unit (300) may be composed of a damper bracket (310) installed on the chair frame (130), a damper index plunger (320) installed on the damper bracket (310), a spring bracket (330) installed on the chair frame (130), and a spring index plunger (340) installed on the spring bracket (330).

[0047] At this time, it would be preferable for a guide hole (not shown) of a predetermined diameter to be formed in the damper bracket (310) and the spring bracket (330).

[0048] In addition, the index plunger (320) for the damper is installed on the damper bracket (310), and the insertion / extraction stick (323) is inserted into or removed from the interior of the body (321) by rotational operation of the rotating body (322), so as to be inserted into or removed from the damper fixing member (220) provided on the piston rod (211) side of the gas damper (210).

[0049] That is, when the gas damper (210) is rotated upward and folded toward the chair frame (130), the damper fixing member (220) is positioned on one side of the damper bracket (310), and the pin fixing hole (221) formed in the damper fixing member (220) is configured to communicate with the guide hole.

[0050] In this state, when the rotating body (322) of the index plunger (320) for the damper is rotated, the insertion stick (323) is withdrawn from the body (321), passes through the guide hole, and is inserted into the pin fixing hole (221).

[0051] Additionally, the spring index plunger (340) is installed on the spring bracket (330), and by rotating the rotary operating mechanism (342), the protruding insertion pin (343) is inserted into or removed from the interior of the body (341) and inserted into or removed from the fixed protruding part (251) provided in the cushioning spring part (230).

[0052] That is, when the cushioning spring part (230) is rotated upward and folded toward the chair frame (130), the fixed protrusion (251) provided on one side of the cushioning spring part (230) is positioned on one side of the spring bracket (330), and the pin fastening hole (not shown) formed in the fixed protrusion (251) is configured to communicate with the guide hole.

[0053] In this state, when the rotation operating part (342) of the spring index plunger (340) is rotated, the protruding insertion pin (343) is withdrawn from the body (341), passes through the guide hole, and is inserted into the pin fastening hole (not marked) of the fixed protruding part (251).

[0054] In this way, the fixing unit (300) is configured to quickly and simply fix the wheelchair cushioning unit (200), which is composed of the gas damper (210) and the cushioning spring unit (230), using a lever-type index plunger.

[0055] In addition, the wheelchair docking unit (400) is installed on a partition plate (401) provided inside the low-floor bus and fixes the longitudinal upper side of the downwardly rotated wheelchair cushioning unit (200) to restrict the movement of the wheelchair (100) and allow the impact transmitted to the wheelchair during a collision with the low-floor bus to be mitigated by the wheelchair cushioning unit (200).

[0056] As an embodiment, the wheelchair docking unit (400) comprises a damper docking bracket (410) installed on the partition plate (401), a damper docking index plunger (420) installed on the damper docking bracket (410) such that a positioning pin (423) is inserted into or removed from the interior of a mounting body (421) by rotational operation of a rotation lever (422) to be fitted into or removed from a damper fixing member (220) provided on the piston rod (211) side of the gas damper (210), a spring docking bracket (430) installed on the partition plate (401), and a protruding docking pin (443) installed on the spring docking bracket (430) such that a protruding docking pin (443) is inserted into or removed from the interior of a mounting body (441) by rotational operation of an operation lever (442) to be fitted into or removed from the cushioning spring unit (230). It may be composed of a spring docking index plunger (440) configured to be fitted into or unfitted into a fixed protrusion (251).

[0057] At this time, it would be preferable for a guide hole (not shown) of a predetermined diameter to be formed in the damper docking bracket (410) and the spring docking bracket (430).

[0058] The above-described damper docking index plunger (420) is configured such that when the gas damper (210) is rotated downward and rotated toward the damper docking bracket (410) provided on the partition plate (401), the damper fixing member (220) of the gas damper (210) is positioned on one side of the damper docking bracket (410), and the pin fixing hole (221) formed in the damper fixing member (220) communicates with the guide hole.

[0059] In this state, when the rotation lever (422) of the docking index plunger (420) for the damper is rotated, the positioning pin (423) is withdrawn from the mounting body (421), passes through the guide hole, and is inserted into the pin fixing hole (221).

[0060] Additionally, when the spring docking index plunger (440) rotates the buffer spring part (230) downward in the direction of the spring docking bracket (430) provided on the partition plate (401), the fixed protrusion (251) provided on one side of the buffer spring part (230) is positioned on one side of the spring docking bracket (430), and the pin fastening hole (not shown) formed in the fixed protrusion (251) is configured to communicate with the guide hole.

[0061] In this state, when the operating lever (442) of the spring docking index plunger (440) is rotated, the protruding docking pin (443) is withdrawn from the mounting body (441), passes through the guide hole, and is inserted into the pin connection hole (not marked) of the fixed protrusion (251).

[0062] Through the simple operation of the above-mentioned wheelchair docking unit (400), the wheelchair buffer unit (200), which consists of the gas damper (210) and the buffer spring unit (230), can be quickly docked to the low-floor bus, thereby preventing the problem of delays in the operation of the low-floor bus. Furthermore, the wheelchair buffer unit can cushion the impact caused by a collision accident of the low-floor bus or the forward and backward shaking that occurs while driving, thereby increasing the safety of the wheelchair occupant.

[0063] Here, the above partition plate (401) may have a support plate (402) installed to support one side of the gas damper (210) and the buffer spring part (230) that are rotated downward from the wheelchair, so that the guide holes formed in the damper docking bracket (410) and the spring docking bracket (430) can naturally communicate with the pin fastening hole (not indicated) formed in the fixed protrusion (251) and the pin fixing hole (221) formed in the damper fixing member (220), thereby enabling rapid docking of the gas damper and the buffer spring part by rotational operation of the damper docking index plunger (420) and the spring docking index plunger (440).

[0064] Meanwhile, the wheelchair (100) may be equipped with a four-point safety belt (500) having a pair of shoulder bands (510) that support the shoulder and chest areas of a user seated in the wheelchair, and a waist band (520) that supports the waist area of ​​a user seated in the wheelchair and is connected to the shoulder bands (510).

[0065] That is, the above 4-point safety belt (500) prevents fall accidents in which the user is thrown out of the wheelchair due to a front-to-rear collision or sudden stopping of the low-floor bus, and allows the user to maintain a proper posture while traveling to the destination.

[0066] At this time, a tongue plate (522) may be installed at the end of one of the pair of waist bands (520), and a buckle member (523) for fixing the tongue plate (522) may be installed at the end of the other of the pair of waist bands (520).

[0067] A shoulder band hook (511) is installed on the upper longitudinal side of the shoulder band (510) to allow it to be hooked onto the upper side of the shoulder band, and the shoulder band hook (511) is fixed by being hooked onto an upper hook part (600) installed such that its upper longitudinal side is exposed to the outside of the backrest cushion seat (120) while its lower longitudinal side is fixed to the backrest frame (161) of the backrest frame (160).

[0068] At this time, the upper hanging part (600) may be composed of an upper fixing bush (610) that is fixedly installed on the backrest frame (161) and has a mounting insertion hole (611) of a predetermined length formed from the upper side to the lower side, and an upper binding bolt (620) that is screw-coupled to the mounting insertion hole (611) of the upper fixing bush (610). Here, it is preferable that the shoulder band hanging piece (511) be installed to be hooked onto the upper binding bolt (620).

[0069] It is preferable that a waistband hook (521) be installed on one side of the above waistband (520) so as to be hooked onto a downward hook portion (700) that is fixedly installed on the seating frame (141) of the seating skeleton (140).

[0070] At this time, the lower hanging part (700) may be composed of a lower fixing bush (710) having a binding hole (711) of a predetermined depth formed therein, which is connected to a reinforcing pipe (730) installed to connect both sides in the width direction of the seating frame (141), and a lower binding bolt (720) which is screw-coupled to the binding hole (711) of the lower fixing bush (710). Here, it is preferable that the waist band hanging piece (521) be installed to be caught on the lower binding bolt (720).

[0071] The above lower fixing bush (710) may be installed such that one longitudinal side extends from the joint reinforcing member (150) toward the reinforcing pipe (730), and the other longitudinal side penetrates the arm support (170) and is exposed to the outside.

[0072] In this way, the above-mentioned 4-point safety belt (500) is designed so that it can be easily installed or removed by screwing or releasing the upper and lower connecting bolts (720) to the fixing bush. Therefore, when the safety belt is not needed in normal times, it can be carried in a separate carrying space, and when using a low-floor bus or when the use of the safety belt is required, it can be quickly fastened to a wheelchair for use, thereby increasing usability.

[0073] In addition, a downward fixing belt (800) may be installed on the interior floor surface of the low-floor bus to be caught on a belt loop (900) formed on the seating frame (140) of the wheelchair (100).

[0074] At this time, the belt loop (900) is mounted so as to be firmly fixed to the lower front side of the seating frame (140), so that when a wheelchair user boards a low-floor bus, an activity assistant pulls the downward fixing belt (800) provided on the interior floor surface and hooks it onto the belt loop (900), thereby preventing the wheelchair from slipping or shaking while the vehicle is in operation.

[0075] Although specific embodiments of the present invention have been described in detail as above, those skilled in the art will be able to make various modifications without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the embodiments described above, but should be defined by the claims set forth below as well as equivalents thereof. Explanation of the symbols

[0077] 100: Wheelchair 110: Seat cushion 120: Backrest cushion seat 130: Chair frame 140: Seating frame 150: Joint reinforcement 160: Backrest frame 200: Wheelchair cushioning 210: Gas damper 220: Damper fixing device 230: Cushioning spring part 240: Downward support cap 250: Upward support cap 260: Compression spring 300: Fixing unit 310: Damper bracket 320: Index plunger for damper 330: Spring bracket 340: Spring index plunger 400: Wheelchair docking part 401: Partition plate 402: Support plate 410: Damper docking bracket 420: Docking index plunger for damper 430: Spring docking bracket 440: Docking index plunger for springs 500: 4-point seat belt 510: Shoulder straps 520: Waistband 600: Upper hook part 700: Downward hanging part 800: Downward fixing belt 900: Belt loop

Claims

Claim 1 A wheelchair (100) equipped with a chair frame (130) that supports a seating cushion seat (110) and a backrest cushion seat (120); a wheelchair cushioning part (200) installed on the chair frame (130) on the backrest cushion seat (120) such that its lower longitudinal side can rotate up and down; and a fixing unit (300) installed on the chair frame (130) to fix the upper longitudinal side of the wheelchair cushioning part (200) that has been rotated upward. A shock-absorbing docking system for a wheelchair passenger using a low-floor bus, comprising: a wheelchair docking unit (400) that is installed on a partition plate (401) provided inside the low-floor bus and fixes the upper longitudinal side of the wheelchair cushioning unit (200) that is rotated downward to restrict the movement of the wheelchair (100); wherein the wheelchair cushioning unit (200) comprises a pair of gas dampers (210) that are rotatably mounted on a damper rotation guide (163) installed on the chair frame (130) with their lower longitudinal sides spaced apart from each other in the width direction of the chair frame (130), and a cushioning spring unit (230) that is rotatably mounted on a spring rotation guide (164) installed on the chair frame (130) with its lower longitudinal side positioned between the pair of gas dampers (210). Claim 2 In claim 1, the fixing unit (300) comprises a damper bracket (310) installed on the chair frame (130), a damper index plunger (320) which is installed on the damper bracket (310) and configured such that an inlet / outlet stick (323) is inserted into or removed from the interior of the body (321) by rotational operation of a rotating body (322) to be fitted into or removed from a damper fixing member (220) provided on the piston rod (211) side of the gas damper (210), a spring bracket (330) installed on the chair frame (130), and a protruding insertion pin (343) which is inserted into or removed from the interior of the body (341) by rotational operation of a rotation operating member (342) while installed on the spring bracket (330) and provided in the cushioning spring part (230). Shock-absorbing docking system for a wheelchair user in a low-floor bus, characterized by comprising a spring index plunger (340) configured to be inserted into or removed from a fixed protrusion (251). Claim 3 In paragraph 2, the shock-absorbing docking system for a wheelchair passenger using a low-floor bus is characterized in that the cushioning spring part (230) comprises a downward support cap (240) having an axial connector (241) that is axially coupled to a spring rotation guide (164) installed on the chair frame (130), an upward support cap (250) having a fixed protrusion (251) into which a protruding insertion pin (343) of the spring index plunger (340) can be inserted, and a compression spring (260) installed so that both longitudinal sides are connected to the downward support cap (240) and the upward support cap (250). Claim 4 In any one of claims 1 to 3, the wheelchair docking unit (400) comprises a damper docking bracket (410) installed on the partition plate (401), a damper docking index plunger (420) installed on the damper docking bracket (410) such that a positioning pin (423) is inserted into or removed from the interior of a mounting body (421) by rotational operation of a rotation lever (422) to be fitted into or removed from a damper fixing member (220) provided on the side of the piston rod (211) of the gas damper (210), a spring docking bracket (430) installed on the partition plate (401), and a protruding docking pin (443) such that a protruding docking pin (443) is inserted into or removed from the interior of a mounting body (441) by rotational operation of an operation lever (442) while installed on the spring docking bracket (430). Shock-absorbing docking system for a wheelchair user in a low-floor bus, characterized by comprising a spring docking index plunger (440) configured to be inserted into or removed from a fixed protrusion (251) provided in a buffer spring part (230). Claim 5 A shock-absorbing docking system for a wheelchair occupant using a low-floor bus, characterized in that, in any one of claims 1 to 3, the wheelchair (100) is equipped with a four-point safety belt (500) having a pair of shoulder bands (510) that support the shoulder and chest areas of a user seated in the wheelchair, and a waist band (520) that supports the waist area of ​​a user seated in the wheelchair and is connected to the shoulder bands (510). Claim 6 delete

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