Protective device of crane

Abstract

The present invention relates to a protective device for a crane made of insulating material, comprising: an adapter installed on the crane and configured to be adjustable in width direction; and an upper cover made of insulating material installed on the adapter and covering the upper surface of the boom head of the crane. This prevents safety accidents and line failures.

Description

Technology Field

[0001] The present invention relates to a crane protection device made of insulating material, and more specifically, to a crane protection device that prevents safety accidents and line failures. Background Technology

[0003] Numerous methods for handling live wires in overhead distribution lines are utilized, and their application varies depending on the circumstances of each power company.

[0004] In addition, a crane is used to replace distribution lines while they are live.

[0005] For example, FIG. 1 illustrates a method for cutting and replacing a utility pole without interruption using a crane. As illustrated, a pole clamp (20) is installed at the end of the boom (11) of an auger crane (10) and operated by hydraulic pressure, and separately, a pole crusher (40) is installed on the utility pole (P) using a live-line bucket truck (30). The pole (P) to be removed is firmly clamped by the pole clamp (20) mounted on the auger crane (10), and the necessary parts of the utility pole (P) to be removed are crushed and cut by the pole crusher (40) which receives hydraulic pressure from the live-line bucket truck (30). That is, by using an auger crane (10), the pole to be replaced can be removed while maintaining the power supply status of the crossarms and power distribution cables, and then a new pole can be erected in the place where the removed pole was located, and the crossarms and power distribution cables of the pole being removed can be transferred to the newly installed pole while maintaining the power supply status.

[0006] However, there was a problem where safety accidents and power distribution line failures occurred when cranes were used during live-line work, as the cranes came into contact with live extra-high voltage power lines.

[0007] Specifically, referring to FIG. 2, as the boom (11) of the crane (10) moves toward the bucket (31) on which the worker is seated, there is a risk that the boom head (12), which is the end of the boom (11), may come into contact with an adjacent high-voltage power line (50), and if the boom head (12) and the high-voltage power line (50) come into contact, there is a problem that the power distribution line may malfunction or a safety accident may occur to the worker.

[0008] Accordingly, the boom head (12) needs a crane protection device to prevent safety accidents and line failures even if it comes into contact with a live high-voltage power line (50).

[0009] In particular, since cranes come in various types and sizes depending on the manufacturer, a crane safety device is required that can be installed on cranes of various sizes, regardless of type or manufacturer. The problem to be solved

[0011] The present invention was conceived from the aforementioned background and aims to provide a protective device for a crane that prevents the boom head from coming into direct contact with an extra-high voltage power line.

[0012] In addition, the purpose is to provide a crane protection device that can prevent safety accidents and line failures caused by the boom head coming into contact with extra-high voltage power lines by providing various covers made of insulating material.

[0013] In addition, the purpose is to provide a crane safety device that can be installed on the boom head regardless of the size of the crane, making it convenient to use and allowing for a wide range of applications, thereby reducing manufacturing costs.

[0014] In addition, the purpose is to provide a crane safety device that is easy to install and remove, as it can be installed on an existing crane without separate processing of the crane.

[0015] The objectives of the present invention are not limited thereto, and other unmentioned objectives will be clearly understood by a person skilled in the art from the description below. means of solving the problem

[0017] According to the present invention, a protection device for a crane may include: an adapter installed on the crane and configured to have an adjustable width; and an upper cover installed on the adapter, which surrounds the upper surface of the boom head of the crane and is made of an insulating material.

[0018] The above adapter may have at least one fastening groove with screw threads formed on the inside so that the upper cover is installed on the crane.

[0019] The protective device of the crane may further include a first installation member that fixes the upper cover to the adapter; and the first installation member may be characterized by being fixed to the boom head side via a first fixing member that passes through one end and is screw-fastened into the fastening groove.

[0020] The adapter may include: a first body supporting one side of the boom head; a second body supporting the other side of the boom head; and a fastening member passing through the first body and tightened to the second body so that the first body and the second body clamp the boom head.

[0021] The first body may have at least one fastening part in the form of a hole or groove to which a fastening member is fixed by screw fastening, and the second body may have at least one slide hole through which the fastening member passes and moves along the width direction.

[0022] The adapter may include: a first body supporting one side of the boom head; a second body supporting the other side of the boom head; and a first coupling member passing through the first body and the second body and tightened to a second coupling member so as to clamp the boom head.

[0023] The first body and the second body may be provided with a first through hole and a second through hole through which the first connecting member penetrates in the width direction.

[0024] The upper cover may include: an upper cover body formed in a plate shape arranged along a first direction and installed on the adapter; and an upper slider installed on the upper cover body so as to be movable along the first direction to extend the length of the upper cover in the first direction.

[0025] The safety device of the crane may further include a rear cover made of an insulating material that is hinge-connected to the rear end of the upper cover and surrounds the rear surface of the boom head.

[0026] The above adapter may have at least one screw groove with internal threads formed therein so that the rear cover can be installed on the crane.

[0027] The protection device of the crane may further include a second installation member that fixes the rear cover to the adapter; and the second installation member may be characterized by being fixed to the boom head side via a second fixing member that passes through one end and is screw-fastened into the screw groove.

[0028] The rear cover may be arranged along a second direction intersecting a first direction in which the upper cover is arranged, and the rear cover may include a rear cover body formed in a plate shape arranged along the second direction and installed on the adapter; and a rear slider installed to be movable along the second direction on the rear cover body.

[0029] The protective device of the crane may further include side covers made of insulating material that are installed on the upper cover and surround both sides of the boom head. Effects of the invention

[0031] According to the present invention, there is an effect of preventing the crane boom head from coming into direct contact with the extra-high voltage power line.

[0032] In addition, by providing various covers made of insulating material, it is effective in preventing safety accidents and line failures caused by the boom head coming into contact with extra-high voltage power lines.

[0033] In addition, it can be installed on the boom head regardless of the size of the crane, making it convenient to use and wide-ranging for application, which has the effect of reducing manufacturing costs.

[0034] In addition, since it can be installed on existing cranes without separate processing, it offers the advantage of easy installation and removal. Brief explanation of the drawing

[0036] Figures 1 and 2 are drawings and photographs illustrating crane operations according to the prior art. FIG. 3 is a side view showing the boom head of a crane before the crane protection device according to an embodiment of the present invention is installed. FIG. 4 is an exploded view of an adapter of a crane protection device according to an embodiment of the present invention. FIG. 5 is a cross-sectional view of an adapter of a crane protection device according to another embodiment of the present invention. FIG. 6 is a side view of a boom with a protective device installed on it according to an embodiment of the present invention. FIGS. 7 and 8 are front views of a boom head with a protective device installed for a crane according to an embodiment of the present invention. Figure 9 is an enlarged view of the boom head portion in Figure 6. Figure 10 is an enlarged view showing the state in which the side cover is installed in Figure 9. Specific details for implementing the invention

[0037] Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the present invention, if it is determined that a detailed description of related known components or functions could obscure the essence of the invention, such detailed description is omitted.

[0038] FIG. 3 shows a side view of a crane boom head before the crane protection device according to an embodiment of the present invention is installed, FIG. 4 shows an exploded perspective view of an adapter of a crane protection device according to an embodiment of the present invention, FIG. 5 shows a cross-sectional view of an adapter of a crane protection device according to another embodiment of the present invention, FIG. 6 shows a side view of a boom with a crane protection device installed according to an embodiment of the present invention, FIG. 7 and FIG. 8 show a front view of a boom head with a crane protection device installed according to an embodiment of the present invention, FIG. 9 shows an enlarged view of the boom head portion in FIG. 6, and FIG. 10 shows an enlarged view of FIG. 9 with a side cover installed.

[0039] Referring to the drawings, the present invention relates to a protective device for a crane, and may include an adapter (100) installed on a crane (10) and configured to have an adjustable width direction, and an upper cover (300) made of an insulating material that is installed on the adapter (100) and covers the upper side (12a) of the boom head (12) of the crane (10).

[0040] A crane (10) is equipped with a boom (11) that is extendable, and a boom head (12) is provided at the tip of the boom (11) to install work tools, etc. Since the boom (11) and the boom head (12) are not made of insulating material, as the boom (11) extends and moves during operation, the boom head (12) comes into contact with extra-high voltage power lines, which can cause safety accidents such as electric shock and line failures. Therefore, to prevent this, the protective device of the crane of the present invention is equipped with at least one of an upper cover (300), a rear cover (400), and a side cover (500) that surround the boom head (12) of the crane (10) to prevent safety accidents and line failures. FIG. 3 shows the boom head (12) of the crane (10) before the protective device is installed. The boom head (12) may have its upper side (12a) covered by an upper cover (300), its rear side (12b) covered by a rear cover (400), and both sides (12c, 12d) covered by side covers (500). Additionally, the boom head (12) may be provided with an installation part (13) on which a crane safety device is installed. This installation part (13) is a part where an adapter (100), which will be described later, is installed, and it is a part that does not move when the boom (11) is extended or when a work tool installed on the boom head (12) is driven. Accordingly, even if the adapter (100) is installed on the installation part (13), it does not interfere with the extension of the boom (11) or the driving of the work tool.

[0042] Specifically, the protective device of the crane of the present invention may be configured to include an adapter (100) and an upper cover (300) made of insulating material.

[0043] The adapter (100) is provided so that the upper cover (300), the rear cover (400), and the side cover (500) can be installed on the boom head (12), and, for example, the adapter (100) is provided to provide a fastening groove (115) and a screw groove (116) so that the covers (300, 400, 500) can be installed.

[0044] That is, since the boom head (12) is not equipped with screw holes or screws for installing a protective device, an adapter (100) is installed on the boom head (12) to provide screw holes through which the protective device can be attached and fixed.

[0045] Additionally, the adapter (100) is provided with adjustable width so that it can be installed on boom heads (12) of various sizes, and can be installed on both narrow and wide boom heads (12). That is, the adapter (100) is provided to be extendable in the width direction of the boom head (12).

[0046] The adapter (100) can be installed by clamping both sides (12c, 12d) of the boom head (12), and, for example, as shown in FIG. 4, can be configured to include a first body (110), a second body (120), and a fastening member (101).

[0047] The adapter (100) is composed of a first body (110) and a second body (120) and can be provided in the form of a block with an approximate 'C' shape, and is configured to clamp both sides (12c, 12d) of the boom head (12) on the upper side of the boom head (12).

[0048] The first body (110) is formed to support one side (12c) of the boom head (12) and is composed of a first adjustment part (111) and a first support part (113) and is provided in the form of a block with an approximate 'L' shape.

[0049] The first support member (113) supports one side (12c) of the boom head (12), and at least one fastening groove (115) and a screw groove (116) are formed on the opposite side of the side supporting the boom head (12).

[0050] The first adjustment part (111) is positioned perpendicular to the first support part (113) and can support the upper side surface (12a) of the boom head (12). The first adjustment part (111) is inserted into an insertion groove (122) formed in the second adjustment part (121) to be described later. This first adjustment part (111) has at least one fastening part (112) to which a fastening member (101) to be described later is coupled. The fastening part (112) is formed in the shape of a groove to which the fastening member (101) is screw-coupled, and screw threads are formed on the inside thereof. For example, as shown in the drawing, the first adjustment part (111) may have six fastening parts (112), but is not limited thereto.

[0051] The second body (120) is formed to support the other side (12d) of the boom head (12) and is provided in the form of a block approximately in the shape of an 'ㄱ', composed of a second adjustment part (121) and a second support part (124).

[0052] The second support member (124) supports the other side (12d) of the boom head (12), and at least one fastening groove (125) and a screw groove (126) may be formed on the side opposite to the side supporting the boom head (12).

[0053] The second adjustment part (121) is positioned perpendicular to the second support part (124) and can support the upper side surface (12a) of the boom head (12). The second adjustment part (121) is recessed at the end surface and has an insertion groove (122) formed to allow the first adjustment part (111) to be inserted. The adapter (100) may have at least one slide hole (123) through which the first adjustment part (111) passes through the insertion groove (122) and moves along the width direction. The slide hole (123) is formed long along the width direction of the boom head (12), and as shown in the drawing, if there are six fastening members (101), two fastening members (101) can be inserted and move along the width direction.

[0054] The fastening member (101) passes through the first body (110) and is fastened to the second body (120) so that the first body (110) and the second body (120) clamp the boom head (12). That is, the fastening member (101) passes through the slide hole (123) and is screw-coupled to the fastening part (112), and may be, for example, a bolt or a screw.

[0055] In this way, when adjusting the widthwise length of the adapter (100), the fastening member (101) is released from the fastening part (112) to adjust the distance between the first body (110) and the second body (120). At this time, the plurality of fastening members (101) move along the slide hole (123) while inserted into the slide hole (123).

[0056] Then, after adjusting the first body (110) and the second body (120) to clamp both sides (12c, 12d) of the boom head (12), a plurality of fastening members (101) are screw-coupled to the fastening part (112), and the screw coupling is tightened so that the first body (110) and the second body (120) are fixed together by the tightening force of the fastening members (101) and the fastening part (112). Accordingly, the adapter (100) is fixed to the boom head (12).

[0057] Here, the fastening member (101) may be provided with a washer (not shown) between it and the surface supporting the second body (220). The washer may be provided as a spring washer to elastically support the second body (220) and prevent the fastening member (101) from loosening, but is not limited thereto.

[0059] Meanwhile, as shown in FIG. 5, the adapter (200) is configured to include a first body (210), a second body (220), a first coupling member (201), and a second coupling member (202) so as to be able to clamp both sides (12c, 12d) of the boom head (12).

[0060] The adapter (200) is composed of a first body (210) and a second body (220) and can be provided in the form of a block with an approximate 'C' shape, and is configured to clamp both sides (12c, 12d) of the boom head (12) on the upper side of the boom head (12).

[0061] The first body (210) is formed to support one side (12c) of the boom head (12) and is provided in the form of a block with an approximate 'L' shape, consisting of a first adjustment part (211) and a first support part (213).

[0062] The first support member (213) supports one side (12c) of the boom head (12), and at least one fastening groove and a screw groove are formed on the opposite side of the side supporting the boom head (12).

[0063] The first adjustment part (211) is positioned perpendicular to the first support part (213) and can support the upper side (12a) of the boom head (12). The first adjustment part (211) is inserted into an insertion groove (222) formed in the second adjustment part (221) to be described later. A first through hole (212) is formed in this first adjustment part (211) to pass through the first coupling member (201) to be described later. The first through hole (212) is formed along the width direction of the boom head (12) and can be formed by penetrating both ends of the first adjustment part (211). A plurality of such first through holes (212) may be formed, but are not limited thereto.

[0064] The second body (220) is formed to support the other side (12d) of the boom head (12) and is provided in the form of a block with an approximate 'L' shape, consisting of a second adjustment part (221) and a second support part (224).

[0065] The second support member (224) supports the other side (12d) of the boom head (12), and at least one fastening groove and a screw groove may be formed on the side opposite to the side supporting the boom head (12).

[0066] The second adjustment part (221) is positioned perpendicular to the second support part (224) and can support the upper side (12a) of the boom head (12). The second adjustment part (221) is provided with an insertion groove (222) formed by being recessed at the end surface so that the first adjustment part (211) is inserted therein. The adapter (200) extends along the width direction of the boom head (12) by adjusting the degree to which the first adjustment part (211) is inserted into the insertion groove (222) to fix the first body (210) and the second body (220). A second through hole (223) is formed in this second adjustment part (221) to pass through the first coupling member (201). The second through hole (223) can be formed by penetrating from the insertion groove (222) to the end of the second adjustment part (221) and is formed along the width direction of the boom head (12). Such second through holes (223) can also be formed in multiple numbers, but are not limited thereto.

[0067] The first coupling member (201) passes through the first body (210) and the second body (220) to clamp the boom head (12) and is fastened to the second coupling member (202). That is, the first coupling member (201) passes through the first through hole (212) and the second through hole (223) and is screw-coupled to the second coupling member (202). For example, the first coupling member (201) may be a bolt and the second coupling member (202) may be a nut.

[0068] In this way, when adjusting the width direction length of the adapter (200), the second connecting member (202) is released from the first connecting member (201) to adjust the distance between the first body (110) and the second body (120).

[0069] Then, after adjusting the first body (210) and the second body (220) so that they each clamp the two sides (12c, 12d) of the boom head (12), the second coupling member (202) is screw-coupled to the first coupling member (201) and the screw coupling is tightened so that the first body (210) and the second body (220) are fixed to clamp the two sides (12c, 12d) of the boom head (12) by the tightening force of the first coupling member (201) and the second coupling member (202). Accordingly, the adapter (200) is fixed to the boom head (12).

[0070] Here, the first connecting member (201) and the second connecting member (202) may each be provided with a washer (not shown) between the surface supporting the first body (210) and the second body (220). The washer may be provided as a spring washer to elastically support the first body (210) and the second body (220) and prevent the first connecting member (201) and the second connecting member (202) from loosening, but is not limited thereto.

[0072] Referring to FIGS. 6 and 9, the upper cover (300) is installed on the adapter (100) and covers the upper side (12a) of the boom head (12) of the crane (10), and is made of an insulating material. Specifically, this upper cover (300) is configured to include an upper cover body (310) and an upper slider (320), and the upper cover body (310) and the upper slider (320) are made of an insulating material.

[0073] The upper cover body (310) is positioned along the upper side surface (12a) of the boom head (12) and covers the upper side surface (12a). At this time, the direction in which the upper cover body (310) is positioned is designated as the first direction below, and the first direction may be the positioning direction of the upper side surface (12a) of the boom head (12). The upper cover body (310) may be formed in a plate shape that is positioned along the first direction, and the upper cover body (310) may be made of an insulating material, or the side opposite to the face of the upper cover body (310) facing the upper side surface (12a) of the boom head (12) may be provided coated with an insulating material.

[0074] This upper cover body (310) is fixed to the adapter (100) via a first mounting member (301). That is, the first mounting member (301) is provided to fix the upper cover (300) to the adapter (100).

[0075] The first installation member (301) is formed in a solid bar shape, one end is fixed to the fastening groove (115) of the adapter (100), and the other end is fixed to the upper cover body (310).

[0076] At least one fastening groove (115) is provided in the adapter (100) so that the upper cover (300) can be installed on the crane (10), and a screw thread is formed on the inner side to connect the first fixing member (302). That is, the first fixing member passes through one end of the first installation member (301) and is screw-fastened into the fastening groove (115), and accordingly, the upper cover (300) is fixed to the boom head (12) side through the first installation member (301).

[0077] In addition, a fastening hole is formed in the upper cover body (310) to which the first fixing member (302) is fastened, and the first fixing member (302) passes through the other end of the first installation member (301) and is screw-fastened to the upper cover body (310), thereby fixing the first installation member (301).

[0078] An upper slider (320) is installed to be movable along a first direction on an upper cover body (310) so that the upper cover (300) can be extended along a first direction. This upper slider (320) may be positioned between the upper cover body (310) and the upper side surface (12a), or on the opposite side of the upper side surface (12a) of the upper cover body (310).

[0079] That is, since the upper cover (300) is installed on a boom head (12) of various sizes to protect the boom head (12), when the boom head (12) is formed long in the first direction, the length of the upper cover (300) in the first direction is extended to cover the boom head (12), and when the boom head (12) is formed relatively short in the first direction, the length of the upper cover (300) in the first direction is reduced to cover the boom head (12).

[0080] The upper cover body (310) is provided with at least one upper guide (330) through which the upper slider (320) passes. The upper guide (330) provides a space on the inside through which the upper slider (320) passes, and an upper slider fixing member (331) is attached to fix the upper slider (320) to the upper cover body (310).

[0081] The upper slider fixing member (331) may be composed of a bolt passing through the upper guide (330) and the upper slider (320), and a nut fastened to the bolt. Additionally, the hole through which the upper slider fixing member (331) of the upper guide (330) passes is formed to have a circular cross-section corresponding to the upper slider fixing member (331). Furthermore, the upper slider (320) may be formed penetrating both sides and extending along the first direction, and may be provided with an upper rail hole (321) into which the upper slider fixing member (331) is inserted and moves.

[0082] Accordingly, the upper cover (300) can adjust the length in the first direction by setting the position of the upper slider (320) relative to the upper cover body (310) and then tightening the upper slider fixing member (331).

[0084] Additionally, the crane's protective device may further include a rear cover (400).

[0085] The rear cover (400) is hinged to the upper cover (300) to accommodate boom heads (12) of various sizes, and the angle of the rear cover (400) relative to the upper cover (300) can be changed.

[0086] That is, the upper end of the rear cover (400) is hinge-connected to the rear end of the upper cover (300), and as the upper cover (300) is fixed to the adapter (100) through the first installation member (301) and the rear cover (400) is fixed to the adapter (100) through the second installation member (402) to be described later, the angle between the upper cover (300) and the rear cover (400) is fixed.

[0087] The rear cover (400) is installed on the adapter (100) and covers the rear surface (12b) of the boom head (12) of the crane (10), and is made of an insulating material. Specifically, this rear cover (400) is configured to include a rear cover body (410) and a rear slider (420), and the rear cover body (410) and the rear slider (420) are made of an insulating material.

[0088] The rear cover body (410) is positioned along the rear surface (12b) of the boom head (12) to wrap around the rear surface (12b). At this time, the direction in which the rear cover body (410) is positioned is designated as the second direction below, and the second direction may intersect with the first direction and may be the positioning direction of the rear surface (12b) of the boom head (12). The rear cover body (410) may be formed in a plate shape positioned along the second direction, and the rear cover body (410) may be made of an insulating material, or the side opposite to the surface facing the rear surface (12b) of the boom head (12) of the rear cover body (410) may be provided coated with an insulating material.

[0089] This rear cover body (410) is fixed to the adapter (100) via a second mounting member (402). That is, the second mounting member (402) is provided to fix the rear cover (400) to the adapter (100).

[0090] The second installation member (402) is formed in a solid bar shape, one end is fixed to the screw groove (116) of the adapter (100), and the other end is fixed to the rear cover body (410).

[0091] At least one screw groove (116) is provided in the adapter (100) so that the rear cover (400) can be installed on the crane (10), and a second fixing member (402) is coupled thereto by forming a screw thread on the inner side. That is, the second fixing member passes through one end of the second installation member (402) and is screwed into the screw groove (116), and accordingly, the rear cover (400) is fixed to the boom head (12) side through the second installation member (402).

[0092] In addition, a fastening hole is formed in the rear cover body (410) to which the second fixing member (402) is fastened, and the second fixing member (402) passes through the other end of the second installation member (402) and is screw-fastened to the rear cover body (410), thereby allowing the second installation member (402) to be fixed.

[0093] A rear slider (420) is installed to be movable along a second direction on the rear cover body (410) so that the rear cover (400) can be extended along a second direction. This rear slider (420) may be positioned between the rear cover body (410) and the rear surface (12b), or on the opposite side of the rear surface (12b) of the rear cover body (410).

[0094] That is, the rear cover (400) is positioned so that the rear slider (420) does not protrude from the rear cover body (410) so that its length is reduced during storage or transport, and when installing the rear cover (400) on the boom head (12), the rear slider (420) can be protruded as much as possible from the rear cover body (410) to extend the length in the second direction as much as possible.

[0095] The rear cover body (410) is provided with at least one rear guide (430) through which the rear slider (420) passes. The rear guide (430) provides a space on the inside through which the rear slider (420) passes, and a rear slider fixing member (431) is attached to secure the rear slider (420) to the rear cover body (410).

[0096] The rear slider fixing member (431) may be composed of a bolt passing through the rear guide (430) and the rear slider (420), and a nut fastened to the bolt. Additionally, the hole through which the rear slider fixing member (431) of the rear guide (430) passes is formed to have a circular cross-section corresponding to the rear slider fixing member (431). Furthermore, the rear slider (420) may be formed by penetrating both sides and extending along a second direction, and may be provided with a rear rail hole (421) into which the rear slider fixing member (431) is inserted and moves.

[0097] Accordingly, the rear cover (400) can adjust the second direction length by setting the position of the rear slider (420) relative to the rear cover body (410) and then tightening the rear slider fixing member (431).

[0099] Meanwhile, FIGS. 7 and 8 show a state in which a protective device is installed on the boom head (12) of the crane (10).

[0100] The boom head (12) of FIG. 7 is formed to be relatively shorter in width direction than the boom head (12) of FIG. 8, and in this case, the width direction length of the adapter (100) is adjusted so that the adapter (100) clamps both sides of the boom head (12). Also, one side of the upper cover (300) in the width direction can be fixed to the adapter (100) through the first installation member (301).

[0101] FIG. 8 shows a case where a protective device is installed on a boom head (12) with a relatively long widthwise length. According to FIG. 8, the widthwise length of the adapter (100) is adjusted to be extended so that the adapter (100) clamps both sides of the boom head (12). Also, one side of the upper cover (300) in the widthwise direction can be fixed to the adapter (100) through a first installation member (301).

[0102] However, although not shown in the drawing, if the other side in the width direction of the upper cover (300) is located on a virtual plane extending the other side (12d) of the adapter (100), the other side in the width direction of the upper cover (300) can also be fixed to the adapter (100) through the first installation member (301). That is, both sides in the width direction of the adapter (100) and the upper cover (300) are each fixed through the first installation member (301) to form a more stable structure.

[0104] Meanwhile, the protective device of the crane of the present invention may further include a side cover (500) as shown in FIG. 10.

[0105] The side cover (500) is installed on at least one of the upper cover (300) and the rear cover (400) to cover both sides of the boom head (12) and is made of an insulating material.

[0106] For example, these side covers (500) may be rubber blankets made of insulating rubber mats made of insulating material, and one side may be fixed to the upper cover (300) through a cover fixing member (501), and the adjacent side may be fixed to the rear cover (400) through a cover fixing member (501). The cover fixing member (501) may be a bolt or a screw and may pass through the side cover (500) and be screw-fastened to the upper cover (300) or the rear cover (400).

[0107] Here, the cover fixing member (501) may be an insulating bolt made of an insulating material and may be provided with a washer (not shown). The washer is provided to have a wide support area between the head portion of the cover fixing member (501) and the side cover (500), and may be, for example, a Teflon washer, but is not limited thereto. In addition, the insulating bolt refers to a bolt made of polyethylene material, which is the material of the insulating wire.

[0108] Additionally, the first installation member (301) and the second installation member (302) are also made of an insulating material, provided that the first installation member (301) and the second installation member (302) may be made of fiberglass (FRP) to increase strength.

[0110] According to embodiments of the present invention having such a shape and structure, there is an effect of preventing the crane boom head from coming into direct contact with the extra-high voltage power line.

[0111] In addition, by providing various covers made of insulating material, it is effective in preventing safety accidents and line failures caused by the boom head coming into contact with extra-high voltage power lines.

[0112] In addition, it can be installed on the boom head regardless of the size of the crane, making it convenient to use and wide-ranging for application, which has the effect of reducing manufacturing costs.

[0113] In addition, since it can be installed on existing cranes without separate processing, it offers the advantage of easy installation and removal.

[0114] Although it has been described above that all components constituting an embodiment of the present invention are combined or operate as a single unit, the present invention is not necessarily limited to such an embodiment. That is, within the scope of the purpose of the present invention, all components may be selectively combined in one or more ways to operate.

[0115] The foregoing description is merely an illustrative explanation of the technical concept of the present invention, and those skilled in the art to which the present invention pertains will be able to make various modifications and variations within the scope of the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are intended to explain, not limit, the technical concept of the present invention, and the scope of the technical concept of the present invention is not limited by these embodiments. The scope of protection of the present invention shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention. Explanation of the symbols

[0117] 10: Crane 11: Boom 12: Boomhead 13: Installation part 100, 200: Adapter 110, 210: First body 111, 211: 1st control unit 113, 213: 1st Support Section 120, 220: Second body 121, 221: Second control unit 122, 222: Insertion slot 124, 224: Second support section 300: Top cover 301: First installation member 302: First fixing member 310: Upper cover body 320: Upper slider 321: Upper rail hole 330: Upper guide 400: Rear cover 401: Second installation member 402: Second fixing member 410: Rear cover main body 420: Rear slider 421: Rear rail hole 430: Rear Guide 500: Side cover

Claims

Claim 1 A protective device for a crane made of insulating material, comprising: an adapter installed on a crane and configured to be adjustable in width direction; an upper cover made of insulating material installed on the adapter and covering the upper side of the boom head of the crane; and a rear cover made of insulating material hinged to the rear end of the upper cover and covering the rear side of the boom head; wherein the adapter comprises: a first body supporting one side of the boom head; a second body supporting the other side of the boom head; and a fastening member passing through the first body and tightened to the second body so as to clamp the first body and the second body to the boom head; wherein the rear cover is arranged along a second direction intersecting a first direction in which the upper cover is arranged, and the rear cover comprises: a rear cover body formed in a plate shape arranged along the second direction and installed on the adapter; and a rear slider installed on the rear cover body so as to be movable along the second direction.

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