Current collecting apparatus for monorail

Abstract

The present invention relates to a current collection device for a monorail, comprising: a fixed frame coupled to the lower part of the vehicle body of the monorail; and a frame portion including at least one first through hole formed in the fixed frame. A current collection unit comprising: a sliding moving member coupled to the first through hole so as to be movable inwardly and outwardly; a first elastic body coupled to the sliding moving member by passing through the first through hole; a current collection contact bar coupled to the end of the first elastic body and arranged to be in close contact with the power supply rail by elasticity; and a current collection frame supporting the current collection contact bar; wherein the current collection contact bar is guided by the current collection frame so as to be slidably movable in the longitudinal direction of the power supply rail, and is fixed so as not to deviate outwardly from the power supply rail by a stopper formed on the power supply rail; wherein the current collection contact bar can be selectively positioned forward or rearward relative to the first through hole along the direction of movement of the vehicle body by the first elastic body; and when an external impact including a step occurs while the current collection contact bar is positioned forward in the direction of movement of the vehicle body, the current collection contact bar moves backward by the elastic deformation of the first elastic body, and simultaneously the sliding moving member moves outward, and then the first elastic body It is characterized by moving inward due to a restoring force. With this configuration, the current collection contact bar is made to adhere to the power supply rail by the first elastic body, so that the current collection contact bar is continuously in contact with the power supply rail, thereby improving the continuity of power supply during operation and reducing contact failure, voltage drop, and spark generation.

Description

Technology Field

[0001] The present invention relates to a current collection device for a monorail, and more specifically, to a current collection device for a monorail that prevents the current collection part from becoming detached or damaged due to impact caused by the difference in rail height during the operation of a monorail vehicle. Background Technology

[0003] Monorail vehicles transport people or materials in various environments such as factories, logistics centers, airports, and theme parks. A widely applied method utilizes power supply rails and vehicle-side current collectors to receive power and control signals from an external power system for vehicle operation. These current collectors are generally positioned on the underside or side of the vehicle body, and power is supplied to the vehicle's drive, control, and communication devices by receiving power through a current collection contact bar (or current collection shoe) that remains in contact with the power supply rail.

[0004] However, along the monorail's travel path, unevenness or eccentricity in the power supply rail may occur due to installation errors, structural sagging, joints, curved sections, and rail connections, and vibrations or external impacts may be repeatedly applied during operation. In such cases, contact failure may occur as the current collector contact bar momentarily detaches from the power supply rail or contact pressure fluctuates rapidly. This raises concerns about potential issues such as arc (spark) generation, excessive wear of the contact surface, heat generation, voltage drop, and power supply instability. In particular, repeated contact failures not only shorten the lifespan of the current collector contact bar and power supply rail but also potentially lead to operational disruptions, such as vehicle stoppage or control errors.

[0005] Furthermore, if the current collection contact bar detaches from the power supply rail to the side or outward during operation, not only is the current collection function lost, but there is also a risk that the detached contact bar may interfere with surrounding structures, causing damage or safety accidents. Accordingly, guide structures have conventionally been applied to prevent the detachment of the contact bar; however, a simple guide structure alone cannot adequately cope with instantaneous displacement caused by rail unevenness or impact, and due to the conflict between preventing detachment and maintaining contact pressure, it may instead result in increased friction, excessive restraint force, noise, and increased wear. Prior art literature

[0007] Korean Intellectual Property Office Registration No. 10-0892423 (2009.04.10) Korean Intellectual Property Office Registration No. 10-0381342 (2003.04.26) Korean Intellectual Property Office Registration No. 10-1246930 (2013.03.25) Korean Intellectual Property Office Registration No. 10-2000701 (2019.07.16) The problem to be solved

[0008] The present invention was devised to solve the aforementioned problems and aims to provide a current collection device for a monorail that can stably maintain a current collection contact state by improving the problem where the current collection part in contact with the power supply rail becomes loose or contact failure occurs due to step height, vibration, impact, etc., during operation.

[0009] In particular, the purpose is to ensure shock responsiveness and return stability through a structure that absorbs displacement of the current collector in the event of a step difference or impact by the inward and outward movement of the first elastic body and the sliding moving member, and returns it to its original position when the external force is relieved. means of solving the problem

[0011] To achieve the above objectives, a current collection device for a monorail according to a preferred embodiment of the present invention comprises: a fixed frame coupled to the lower part of the vehicle body of the monorail; and a frame portion including at least one first through hole formed in the fixed frame; A current collection unit comprising: a sliding moving member coupled to the first through hole so as to be movable inwardly and outwardly; a first elastic body coupled to the sliding moving member by passing through the first through hole; a current collection contact bar coupled to the end of the first elastic body and arranged to be in close contact with the power supply rail by elasticity; and a current collection frame supporting the current collection contact bar; wherein the current collection contact bar is guided by the current collection frame so as to be slidably movable in the longitudinal direction of the power supply rail, and is fixed so as not to deviate outwardly from the power supply rail by a stopper formed on the power supply rail; wherein the current collection contact bar can be selectively positioned forward or rearward relative to the first through hole along the direction of movement of the vehicle body by the first elastic body; and when an external impact including a step occurs while the current collection contact bar is positioned forward in the direction of movement of the vehicle body, the current collection contact bar moves backward by the elastic deformation of the first elastic body, and simultaneously the sliding moving member moves outward, and then the first elastic body It is characterized by moving inward due to restoring force.

[0012] In addition, a step portion is formed on the inner side of the first through hole to restrict inward movement by catching when the sliding moving member moves inward, and the sliding moving member is prevented from deviating inward by the step portion.

[0013] In addition, the outer side of the current collection frame is characterized by having a moving roller coupled thereto to guide the power supply rail so as to be movable and to prevent it from deviating outward from the power supply rail.

[0014] In addition, the end of the first elastic body is characterized by having a pivot connecting member coupled thereto to the current collection contact bar so as to be pivotably coupled thereto.

[0015] In addition, the current collection contact bar is characterized by having an extension formed to protrude at a position facing the pivot connecting member, and the pivot connecting member is characterized by having an inlet formed so as to allow the extension to be inserted and pivotally coupled. Effects of the invention

[0017] According to the current collection device for a monorail according to the present invention, by ensuring that the current collection contact bar is in close contact with the power supply rail by means of a first elastic body, the current collection contact bar is continuously in close contact with the power supply rail, thereby improving the continuity of power supply during operation and reducing contact failure, voltage drop, and spark generation.

[0018] In particular, when an external force is applied due to a step or impact on the power supply rail, the current collection contact bar is displaced backward and the sliding moving member is displaced outward and then returns, thereby dispersing and absorbing the impact, which can reduce localized impact concentration and uneven wear on the contact bar and rail. Brief explanation of the drawing

[0020] FIG. 1 is a drawing showing a current collection device for a monorail according to a preferred embodiment of the present invention. FIG. 2 is a side cross-sectional view of a current collector for a monorail according to a preferred embodiment of the present invention. FIG. 3 is a front view of a current collection contact bar according to a preferred embodiment of the present invention. FIGS. 4 to 6 are operation diagrams of a current collection device for a monorail according to a preferred embodiment of the present invention. FIG. 7 is a side view of a frame portion according to a preferred embodiment of the present invention. FIG. 8 is a drawing showing a removal part according to a preferred embodiment of the present invention. Specific details for implementing the invention

[0021] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described in detail below together with the accompanying drawings.

[0022] However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Throughout the specification, the same reference numerals refer to the same components.

[0023] Hereinafter, the present invention will be described with reference to the drawings for explaining a current collection device for a monorail according to embodiments of the present invention.

[0024] FIG. 1 is a drawing showing a current collection device for a monorail according to a preferred embodiment of the present invention, FIG. 2 is a side cross-sectional view of a current collection device for a monorail according to a preferred embodiment of the present invention, FIG. 3 is a front view of a current collection contact bar according to a preferred embodiment of the present invention, FIG. 4 to 6 are operation diagrams of a current collection device for a monorail according to a preferred embodiment of the present invention, FIG. 7 is a side view of a frame part according to a preferred embodiment of the present invention, and FIG. 8 is a drawing showing a removal part according to a preferred embodiment of the present invention.

[0026] Referring to these drawings, the current collector for a monorail according to the present embodiment has the feature of cushioning the impact caused by the step difference and simultaneously being able to be stably grounded.

[0027] A current collection device (100) for a monorail according to the present embodiment capable of providing such effects comprises a fixed frame (111) coupled to the lower part of the vehicle body of the monorail, a frame part (110) including at least one first through hole (112) formed in the fixed frame (111), a sliding moving member (121) coupled to the first through hole (112) so as to be movable in an inner or outer direction, a first elastic body (122) coupled to the sliding moving member (121) by passing through the first through hole (112), a current collection contact bar (125) coupled to the end of the first elastic body (122) and arranged to be in close contact with the power supply rail (10) by elasticity, and a current collection frame (124) supporting the current collection contact bar (125), wherein the current collection contact bar (125) is movably sliding in the longitudinal direction of the power supply rail (10). The current collection frame (124) is guided and fixed so as not to deviate outward from the power supply rail (10) by a stopper (11) formed on the power supply rail (10), and the current collection contact bar (125) can be selectively positioned forward or backward relative to the first through hole (112) along the direction of movement of the vehicle body by the first elastic body (122), and when an external impact including a step of the power supply rail (10) occurs while the current collection contact bar (125) is positioned forward in the direction of movement of the vehicle body, the current collection contact bar (125) moves backward by the elastic deformation of the first elastic body (122), and at the same time, the sliding moving member (121) moves outward and then moves inward by the restoring force of the first elastic body (122).

[0028] Additionally, a first inclined portion (112a) is formed at the outer end of the first through hole (112) such that the diameter increases as it extends outward along the circumference. The first inclined portion (112a) guides the sliding moving member (121) to stably flow into the first through hole (112) along the first inclined portion (112a) when it is moved outward and then moved back inward by the restoring force of the first elastic body (122).

[0029] Additionally, a step portion (113) is formed on the inner side of the first through hole (112) so that the sliding moving member (121) is caught when moving inward, thereby restricting inward movement, and the sliding moving member (121) is prevented from moving inward by the step portion (113).

[0030] In addition, the outside of the current collection frame (124) is characterized by having a moving roller (126) coupled thereto to be movably guided to the power supply rail (10) and to prevent it from deviating outward from the power supply rail (10).

[0031] In addition, the first elastic body (122) is characterized by having a pivot connecting member (123) coupled to the end so as to be pivotably coupled to the current collection contact bar (125).

[0032] Additionally, the current collection contact bar (125) is formed with an extension part (125b) so as to protrude in a position facing the pivot connecting member (123), and the pivot connecting member (123) is formed with an insertion part (123a) so as to allow the extension part (125b) to be inserted and pivotally coupled.

[0034] The frame portion (110) includes a fixed frame (111) that is firmly connected to the lower part of the vehicle body. The fixed frame (111) may be connected to the lower structure or lower bracket of the vehicle body by known connecting means such as bolt fastening, welding, or riveting, and it is preferable that the fixed frame be formed of a metal material, such as steel or aluminum alloy, or a material equivalent thereto, having sufficient rigidity so that contact pressure, reaction force, and vibration load generated from the current collector (120) are stably transmitted to the vehicle body.

[0035] Additionally, the fixed frame (111) is formed in a shape that extends downward or sideways from the lower part of the vehicle body to provide a space and mounting surface where the current collector (120) can be installed, and may be formed in a modular shape to facilitate maintenance or replacement.

[0036] At least one first through hole (112) is formed in the fixed frame (111). The first through hole (112) is an opening that provides a path for the sliding moving member (121) and the first elastic body (122) of the current collector (120) to be positioned and moved, and is formed so that the sliding moving member (121) can move inward and outward directions relative to the fixed frame (111).

[0037] The first through hole (112) may be implemented in a circular, elongated, or similar shape to ensure movement stability and guidance precision of the sliding moving member (121), and a bush, liner, or wear-resistant coating (not shown) may be applied to the inner surface of the first through hole (112) to reduce wear caused by repeated movement of the sliding moving member (121). Additionally, an O-ring member (114) for wear reduction and sealing may be attached to the inner surface of the first through hole (112).

[0038] Additionally, a first inclined portion (112a) may be formed at the outer end of the first through hole (112) such that the diameter increases as it extends outward along the circumference, and the first inclined portion (112a) guides the sliding moving member (121) to stably enter the first through hole (112) when it returns from the outside to the inside.

[0039] Additionally, a step portion (113) is formed at the inner end of the first through hole (112) of the fixed frame (111). The step portion (113) acts as a stopper that prevents excessive inward insertion by being caught during the process of the sliding moving member (121) moving inward, thereby setting the limit of the sliding moving member (121)'s inward movement. That is, when the sliding moving member (121) moves inward due to the return operation after the restoration force of the first elastic body (122) or the release of the external force, the step portion (113) causes it to stop at a predetermined position, thereby allowing the reference position of the current collector (120) to be stably maintained.

[0040] The step portion (113) may be formed in a stepped shape on a part of the inner surface of the first through hole (112), or formed in a protruding or locking shape on the inner side of the first through hole (112). If necessary, a relief surface (chamfer or curved surface) for shock absorption and wear reduction may be formed on the contact surface of the step portion (113). In particular, a cushioning member (115) may be attached to the part of the step portion (113) that contacts the sliding moving member (121). The cushioning member (115) is intended to reduce shock or noise generated upon contact with the sliding moving member (121) and may be formed of, for example, rubber or silicone material.

[0041] Furthermore, the frame portion (110) suppresses the displacement of the current collection portion (120) from being excessively transmitted to the outside of the frame portion (110) or conversely excessively drawn inward through the first through hole (112) and the step portion (113), thereby limiting the movement range of the sliding moving member (121) to within the design range even if a step or impact occurs on the power supply rail (10), and provides a functional basis for the current collection contact bar (125) to stably contact the power supply rail (10) while being guided by the current collection frame (124).

[0043] The current collection unit (120) includes a sliding moving member (121) coupled to the first through hole (112) of the frame unit (110) so as to be movable in the inner and outer directions, a first elastic body (122) coupled to the sliding moving member (121) by passing through the first through hole (112), a rotating connecting member (123) coupled to the end of the first elastic body (122), a current collection contact bar (125) arranged to be in close contact with the power supply rail (10) through the rotating connecting member (123), and a current collection frame (124) that supports the current collection contact bar (125) and guides it in the longitudinal direction of the power supply rail (10). The current collection unit (120) is configured to stably maintain the current collection contact state by allowing displacement in the inner and outer directions and forward and backward displacement, and by returning the current collection contact bar (125) even if an instantaneous external force is applied to the current collection contact bar (125) due to a step, vibration, or impact of the power supply rail (10) while the vehicle body is moving.

[0044] The sliding moving member (121) is positioned to be reciprocating in the inner and outer directions while inserted into or coupled to the first through hole (112) formed in the fixed frame (111). The sliding moving member (121) is normally pressed inward by the restoring force of the first elastic body (122) and can maintain a reference position set by the step portion (113). Conversely, when the current collection contact bar (125) is displaced by a step of the power supply rail (10) or an external force, it is configured to be displaced outward and then return inward when the external force is relieved. At this time, the sliding moving member (121) may be implemented with a structure including a low-friction material or a bearing and a bush (not shown) to reduce movement resistance and reduce wear due to repeated movement.

[0046] In order to perform the inward return operation of the sliding moving member (121) more stably, a second elastic body (127) that presses the sliding moving member (121) inwardly, separately from the first elastic body (122), may be further provided. The second elastic body is supported around the fixed frame (111) or the first through hole (112) and contacts or is connected to the sliding moving member (121), providing a continuous preload so that the sliding moving member (121) returns to a reference position set by the step portion (113) when the external force is released after the sliding moving member (121) has been displaced outward. At this time, the second elastic body may be set to have a relatively lower elastic modulus (or spring constant) compared to the first elastic body (122), which is primarily responsible for the contact pressure that presses the current collection contact bar (125) against the power supply rail (10). Accordingly, while minimizing fluctuations in the contact pressure of the current collection contact bar (125), the return responsiveness of the sliding moving member (121) can be improved, thereby suppressing hunting or unnecessary reciprocating displacement caused by driving vibration. As a result, the contact pressure providing function and the slider return function are separated, improving design freedom, and shock absorption and return stability in the step section can be increased.

[0047] The first elastic body (122) is coupled to the sliding moving member (121) by passing through the first through hole (112), and its end is connected to the current collection contact bar (125) through the pivot connecting member (123). The first elastic body (122) can be implemented as a known elastic member such as a coil spring, a leaf spring, or an elastic rod, and provides contact pressure to ensure that the current collection contact bar (125) is stably in contact with the power supply rail (10), while simultaneously performing the function of absorbing impact energy through elastic deformation when an external force is generated and then restoring the position of each component to its original state using restoring force. In particular, the length and coupling position of the first elastic body (122) can be set so that the current collection contact bar (125) can be positioned in a forward or rear position relative to the first through hole (112) along the direction of movement of the vehicle body.

[0048] Specifically, the first elastic body (122) is guided through the first through hole (112) and / or the second through hole (124a) of the current collection frame (124) while coupled to the sliding moving member (121), and the inward and outward movement of the sliding moving member (121) can be induced according to the shape change of the first elastic body (122). For example, when the first elastic body (122) is bent with respect to the direction of movement of the vehicle body, the force component of the first elastic body (122) acts in a direction that presses the sliding moving member (121) inwardly due to the restoring force that attempts to restore the first elastic body (122) to a straight state, and accordingly, the sliding moving member (121) moves inward toward a reference position set by the step portion (113). On the other hand, when the first elastic body (122) is substantially in a straight (or vertical) state with respect to the first through hole (112), the axial elastic force of the first elastic body (122) can act outwardly on the sliding moving member (121) due to the relationship between the free field of the first elastic body (122) and the distance between the connection points, and as a result, the sliding moving member (121) can be configured to return inward by the restoring force of the first elastic body (122) after being temporarily displaced outward and the external force is relieved.

[0049] The current collection frame (124) is a frame structure that supports the current collection contact bar (125) and performs the function of guiding the current collection contact bar (125) to slide along the longitudinal direction of the power supply rail (10). A second through hole (124a) is formed in the center of the current collection frame (124) through which the first elastic body (122) passes to extend to the current collection contact bar (125). It is preferable that the second through hole (124a) be formed with a size that allows rotation and bending of the first elastic body (122).

[0050] The current collection contact bar (125) is a contact member that collects power by being elastically attached to the power supply rail (10), and can slide along the longitudinal direction of the power supply rail (10) while supported by the current collection frame (124). Additionally, a second inclined section (125a) is formed at the front and rear ends of the current collection contact bar (125) to cushion impact caused by steps or foreign substances during the movement of the current collection contact bar (125). The second inclined section (125a) alleviates jamming caused by steps or foreign substances, thereby inducing smooth movement of the current collection contact bar (125).

[0051] Additionally, the current collection contact bar (125) is fixed so as not to detach outward from the power supply rail (10) by an anti-detachment structure corresponding to a stopper (11) formed on the power supply rail (10). For example, a moving roller (126) may be attached to the outer side of the current collection frame (124), and the moving roller (126) is positioned to be caught on the stopper (11) of the power supply rail (10), thereby preventing the current collection contact bar (125) and the current collection frame (124) from lifting or detaching outward. In this way, the current collection contact bar (125) can maintain contact with the power supply rail (10) while allowing longitudinal movement but restricting outward detachment.

[0052] The rotating connecting member (123) is positioned between the end of the first elastic body (122) and the current collection contact bar (125), so that the current collection contact bar (125) can rotate according to the shape deviation or step of the power supply rail (10). An extension part (125b) may be formed on the current collection contact bar (125) to protrude in a position facing the rotating connecting member (123), and an inlet part (123a) may be formed on the rotating connecting member (123) so that the extension part (125b) can be inserted and rotated. Accordingly, when a momentary change in posture is required in a step section, the current collection contact bar (125) can stably maintain the contact surface while correcting the posture around the rotating connecting member (123), and the effect of dispersing impact in conjunction with the elastic deformation of the first elastic body (122) is further enhanced.

[0053] With this configuration, when an external force is applied to the current collection contact bar (125) due to a step or external impact on the power supply rail (10) while the current collection contact bar (125) is positioned in the forward direction of movement of the vehicle body, the first elastic body (122) is elastically deformed so that the current collection contact bar (125) is displaced backward and the sliding moving member (121) is displaced outward at the same time. When the external force is released, the sliding moving member (121) operates to return inward to the reference position set by the step portion (113) by the restoring force of the first elastic body (122). Accordingly, the local concentration of impact occurring in the step section on the current collection contact bar (125) and the power supply rail (10) is mitigated, thereby reducing contact failure, spark generation, and uneven wear, and improving the continuity and durability of the current collection contact state.

[0054] Furthermore, the current collection frame (124) of the current collection unit (120) may further include a foreign matter removal structure to improve the reliability of contact with the power supply rail (10). Specifically, a removal unit (128) may be disposed at the front and rear of the current collection frame (124) to remove foreign matter by adhering to the ground surface (contact surface) of the power supply rail (10), and the removal unit (128) may be implemented in the form of a scraper or a brush. Since the removal unit (128) is elastically pressed by a third elastic body (129) attached to the front and rear ends of the current collection frame (124) and adheres to the ground surface of the power supply rail (10) with a certain pressure, it scrapes or sweeps away dust, metal powder, contaminants, or other foreign matter attached to the surface of the power supply rail (10) along the direction of travel, thereby reducing the inflow to the contact surface of the current collection contact bar (125).

[0055] Additionally, a guide hole (124b) may be formed at the front and rear ends of the current collection frame (124) so ​​that foreign matter removed by the removal unit (128) can be discharged to the outside. At this time, the third elastic body (129) may be further provided with a guide guide (128a) to allow foreign matter removed by the removal unit (128) to move smoothly to the guide hole (124b), and the guide guide (128a) is formed in the form of a guide surface or guide channel that guides foreign matter scraped or swept by the removal unit (128) toward the guide hole (124b). For example, the guide guide (128a) is formed as an inclined surface or a curved surface that extends from the inside of the current collection frame (124) to the guide hole (124b), so that the removed foreign matter is discharged to the outside through the guide hole (124b) by gravity, driving vibration, or air flow. Accordingly, the removal of foreign matter is prevented from remaining inside the current collection frame (124) or around the power supply rail (10) and reattaching, or from interfering with the contact of the current collection contact bar (125), and the increase in contact resistance, spark generation, and uneven wear are reduced, thereby improving the stability of current collection performance even during long-term operation.

[0057] According to the current collection device for a monorail according to the present invention, by ensuring that the current collection contact bar is in close contact with the power supply rail by means of a first elastic body, the current collection contact bar is continuously in close contact with the power supply rail, thereby improving the continuity of power supply during operation and reducing contact failure, voltage drop, and spark generation.

[0058] In particular, when an external force is applied due to a step or impact on the power supply rail, the current collection contact bar is displaced backward and the sliding moving member is displaced outward and then returns, thereby dispersing and absorbing the impact, which can reduce localized impact concentration and uneven wear on the contact bar and rail.

[0060] A person skilled in the art to which the present invention pertains will understand that the present invention may be implemented in other specific forms without altering its technical concept or essential features. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims set forth below rather than by the detailed description above, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts should be interpreted as being included within the scope of the present invention. Explanation of the symbols

[0061] 100: Current collector for monorails 110: Frame section 111: Fixed frame 112: First penetration hole 112a: First inclined section 113: Step portion 114: O-ring member 115: Buffer member 120: Current collector 121: Sliding moving member 122: First elastic body 123: Rotating connecting member 123a: Inlet part 124: Current collection frame 124a: Second penetration hole 124b: Guide ball 125: Current collection contact bar 125a: Second inclined section 125b: Extension section 126: Moving roller 127: Second elastic body 128: Removal section 128a: Guide 129: 3rd elastic body 10: Power supply rail 11: Stopper

Claims

Claim 1 A frame portion comprising a fixed frame coupled to the lower part of the vehicle body of the monorail and at least one first through hole formed in the fixed frame; A current collection unit comprising: a sliding moving member coupled to the first through hole so as to be movable inward or outward directions; a first elastic body coupled to the sliding moving member by passing through the first through hole; a current collection contact bar coupled to the end of the first elastic body and arranged to be in close contact with the power supply rail by elasticity; and a current collection frame supporting the current collection contact bar; wherein the current collection contact bar is guided by the current collection frame so as to be slidably movable in the longitudinal direction of the power supply rail, and is fixed so as not to be detached from the power supply rail in an outward direction by a stopper formed on the power supply rail; wherein the current collection contact bar can be selectively positioned forward or rearward relative to the first through hole along the direction of movement of the vehicle body by the first elastic body; and when an external impact including a step occurs while the current collection contact bar is positioned forward in the direction of movement of the vehicle body, the current collection contact bar moves backward by the elastic deformation of the first elastic body, and simultaneously the sliding moving member moves outward, and then the first elastic body It moves inward by means of a restoring force, and a step portion is formed on the inner side of the first through hole to restrict inward movement by catching when the sliding moving member moves inward, and the sliding moving member is prevented from deviating inward by the step portion, and a moving roller is coupled to the outer side of the current collection frame to guide it to move on the power supply rail and prevent it from deviating outward from the power supply rail, and a pivot connecting member is coupled to the end of the first elastic body so as to be rotatably coupled to the current collection contact bar, an extension portion is formed on the current collection contact bar to protrude at a position facing the pivot connecting member, and an inlet portion is formed on the pivot connecting member so as to be retracted and rotatably coupled to the extension portion.A current collection device for a monorail, characterized in that a removal unit is disposed at the front and rear of the current collection frame to remove foreign matter by being in close contact with the ground surface of the power supply rail, and the removal unit is elastically pressed by a third elastic body coupled to the front and rear ends of the current collection frame to be in close contact with the ground surface of the power supply rail with a certain pressure, a guide hole is formed at the front and rear ends of the current collection frame so that foreign matter removed by the removal unit can be discharged to the outside, and a guide is provided on the third elastic body so that foreign matter removed by the removal unit moves to the guide hole, and the guide guide is formed in the form of a guide surface or guide channel that guides foreign matter scraped or swept by the removal unit toward the guide hole, and includes an inclined surface or curved surface that is continuous from the inside of the current collection frame to the guide hole. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 delete

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