JP2009057180A - Mobile crane - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile crane with a boom end lamp to be lit not only at night but also in daytime and improved in visibility by lowering fitting position of a conventional boom end lamp which is positioned in the boom end surface at a high position and which is lit only at night. <P>SOLUTION: This mobile crane is provided with a telescopic and derricking boom, of which the front end is projected from the front end of a travelling body in a travelling posture in which the boom is fully contracted and fallen, on the travelling body. A boom end lamp is fitted to a lower position in a nearly front end of the boom. The boom end lamp is structured to be lit during the travelling. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a boom tip lamp attached to the front end of a boom of a mobile crane.

9 and 10 are explanatory diagrams relating to a boom tip lamp of a conventional mobile crane. There is a type that attaches a boom tip light above the top boom of a mobile crane, lights the boom tip light during night driving, and alerts surrounding traffic to the attention of the boom front end that protrudes when approaching an intersection. (For example, refer to Patent Document 1).
JP 2003-63771 A

  This kind of boom tip lamp is mounted on the top surface of the boom, is high in position, and is lit only at night.

  Therefore, the present invention aims to provide a boom tip lamp that lowers the mounting position of the boom tip lamp to improve the visibility and lights up during the daytime.

  In order to achieve the above object, a mobile crane according to a first aspect of the present invention includes a boom that can extend and retract on a traveling body, and the front end of the boom projects from the front end of the traveling body in a traveling posture in which the boom is fully contracted and laid down. In the mobile crane, a boom tip light is attached to a position substantially below the front left and right side surfaces of the boom.

  A mobile crane according to a second aspect is the mobile crane according to the first aspect, wherein the auxiliary boom is integrally attached to the tip of the boom and the auxiliary boom is a front end in a traveling posture. The auxiliary boom is mounted at a position substantially below the front left and right side surfaces of the auxiliary boom.

  The mobile crane according to claim 3 is provided with a boom that can be expanded and contracted and raised on the traveling body, and in a traveling posture in which the boom is fully contracted and laid down, the boom front end protrudes from the front end of the traveling body. The boom includes a proximal boom and a distal boom. The distal boom is telescopically inserted into the proximal boom so that the distal boom extends and retracts from the proximal boom. A boom front end lamp is attached to a substantially front end position of a bracket that protrudes to a substantially end portion of the mounting front end side boom on each side surface.

  According to a fourth aspect of the present invention, there is provided the mobile crane according to any one of the first to third aspects, wherein the boom tip lamp is turned on during traveling.

  In the mobile crane according to claim 1, since the boom tip light is mounted at a position substantially below the left and right side surfaces of the front end of the boom, the boom tip light is at a position as low as possible. Visibility from surrounding traffic is possible with a small amount of approach.

In the mobile crane according to claim 2, since the boom tip light is mounted at a position substantially below the front left and right sides of the auxiliary boom, the boom tip light is at a position as low as possible and enters the intersection when entering the intersection. The mobile crane according to claim 3 is attached to substantially the front left and right side surfaces of the base end side boom, and attached to the substantially end portion of the front end side boom, respectively. Since the boom tip light is mounted at a substantially front end position of the bracket that protrudes to the end of the bracket, the boom tip light is as low as possible. Visibility from traffic is possible.

  In the mobile crane according to the fourth aspect, since the boom tip light is turned on during traveling, it is possible to call attention to surrounding trafficers during traveling regardless of day or night.

  Hereinafter, a mobile crane according to the present invention will be described with reference to FIGS.

  FIG. 1 shows an overall view of a mobile crane according to an embodiment of the present invention. A swivel base 2 that can swivel is provided on a traveling body 1 that can travel, and a telescopic boom 4 that is pivotably supported by a hoisting cylinder 3 is provided in the swivel base 2. The telescopic boom 4 is a four-stage boom in which a second boom 4b is slidably inserted into a base boom 4a and a third boom 4c and a top boom 4d are sequentially slidably inserted. The telescopic boom of FIG. 1 is a mobile crane of a type in which the retractable auxiliary boom 10a is stored on the left side and the top boom 4d is the front end of the mobile crane in the traveling state. In the mobile crane, the wire rope 5a fed out from a main winch (not shown) arranged at the rear part of the swivel base 2 passes through the sheave at the tip of the top boom 4d, passes through the sheave of the hook block 6, and the wire rope 5a. The end is fixed to the top boom 4d via a rope socket. Further, as shown in FIG. 7, the auxiliary boom 10b is integrated with the front end of the top boom 4d ′, and in the traveling state, the auxiliary boom 10b is a mobile crane configured to be the front end of the mobile crane. . In the mobile crane, the wire rope 5b fed from a sub winch (not shown) arranged at the rear of the swivel base 2 in addition to the main winch described above passes through the sheave at the tip of the top boom 4d 'and the auxiliary boom 10b. The end of the wire rope 5b is fixed to the subhook 11 via a rope socket.

  An engine is disposed in the engine hood 7 at the rear of the vehicle, and the engine can travel by transmitting driving force to the axle via a transmission, a drive shaft, and the like. At the time of crane work of the mobile crane, the PTO (power take-off) switch is turned on to transmit the power from the engine to the crane work pump. The hydraulic pressure generated by the working pump can turn the swivel base 2, raise and lower the telescopic boom 4, and wind and lower the winch. Since these structures can employ known structures, detailed description thereof is omitted.

  The traveling style of the mobile crane is as shown in FIG. 1 in which the telescopic boom 4 is fully contracted, the swivel base 2 is directed forward of the vehicle travel, and the hook block 6 is provided in front of the swivel base 2. The telescopic boom 4 is laid down, the winch is wound up to the extent that the wire rope 5 is lightly stretched, and the outrigger 8 is stored. In this traveling posture, the front end of the boom 4 protrudes from the front end of the traveling body 1.

  A first embodiment of the present invention will be described. As shown in FIGS. 2, 3, and 4, a boom tip lamp 9 is attached substantially below the front end of the left and right side surfaces of the top boom 4 d.

  The electric wiring is transmitted from the cab to the swivel base and the outer surface of the base boom, and is connected to the top boom 4d by the cord reel (not shown) provided on the outer surface of the base boom 4a and to the left and right boom tip lights 9.

  The boom tip lamp 9 is turned on when the key switch is turned on and the PTO switch is turned off. When the key switch is turned off, or when the key switch is turned on and the PTO switch is turned on, the boom tip lamp is not lit. Therefore, the boom tip light 9 is turned off during crane operation, and the boom tip light 9 is turned on during traveling, and is turned on during traveling day and night.

  Since the boom tip light 9 is mounted at a position as low as possible at the lower part of the front side of the top boom 4d and is located at the lowest possible position, the surrounding traffic Visible from is possible.

  A second embodiment of the present invention will be described. In the first embodiment, the retractable auxiliary boom 10a is stored on the left side and the top boom 4d is the front end of the mobile crane in the traveling state. In the second embodiment, the retractable auxiliary boom 10a is shown in FIGS. Thus, the auxiliary boom 10b is integrated with the front end of the top boom 4d ', and the auxiliary boom 10b is the front end of the mobile crane in the traveling state. The auxiliary boom is located at the bottom of the boom, and a boom tip light 9 is attached to the lower side of the left and right side surfaces of the auxiliary boom 10b.

  The electrical wiring is transmitted from the inside of the cab to the swivel base and the outer surface of the base boom, and is connected to the auxiliary boom 10b and to the left and right boom tip lights 9 by a cord reel (not shown) provided on the outer surface of the base boom 4a.

  The boom tip lamp 9 is turned on when the key switch is turned on and the PTO switch is turned off. When the key switch is turned off, or when the key switch is turned on and the PTO switch is turned on, the boom tip lamp is not lit. Therefore, the boom tip light 9 is turned off during crane operation, and the boom tip light 9 is turned on during traveling, and is turned on during traveling day and night.

  Since the boom tip light is arranged at a position as low as possible on the left and right side surfaces of the auxiliary boom 10b, it is located at a position as low as possible. Further, the visibility is improved.

  A third embodiment of the present invention will be described. In the first and second embodiments, the boom front end lamp 9 is directly attached to the side surface of the front end side boom (top boom), but may be attached to the base end side boom via the bracket 12. That is, as shown in FIG. 8, the boom front end lamp is attached to the substantially front end position of the bracket projecting to the substantially end portion of the attachment front end boom on the substantially front end left and right side surfaces of the base boom 4a which is the base end side boom. .

  In the third embodiment, the base end boom is described as the base boom 4a and the tip end boom as the top boom 4d. However, the base end boom is referred to as the second boom 4b or the third boom 4c, and the tip end boom is referred to as the top boom. Also good. That is, the bracket has a boom end lamp mounted at a substantially front end position of the bracket that protrudes to a substantially end portion of the top boom 4d at a substantially front end left and right position of the second boom 4b or the third boom 4c.

  The electrical wiring when the bracket 12 is attached to the base boom 4a is transmitted from the cab to the swivel base and the outer surface of the base boom 4a, and is transmitted to the left and right boom tip lights 9 through the bracket 12. Further, the electrical wiring when the bracket 12 is attached to the second boom 4b or the third boom 4c is transmitted from the inside of the cab to the swivel base and the outer surface of the base boom, and a cord reel (not shown) provided on the outer surface of the base boom 4a. Thus, the second boom 4b and the third boom 4c are connected to the left and right boom tip lights 9 via the bracket 12, respectively.

  The boom tip lamp 9 is turned on when the key switch is turned on and the PTO switch is turned off. When the key switch is turned off, or when the key switch is turned on and the PTO switch is turned on, the boom tip lamp is not lit. Therefore, the boom tip light 9 is turned off during crane operation, and the boom tip light 9 is turned on during traveling, and is turned on during traveling day and night.

  Since the boom tip light is located at the lowest possible position on the right and left sides of the top boom 4d, it is located as close as possible to the surrounding traffic. Further, the visibility is improved.

  The boom tip light 9 may be a high brightness LED.

  The boom tip light 9 is lit only during traveling, but a separate switch may be provided to light during crane work. By doing so, there is an effect that it is easy to confirm the tip of the boom during crane work.

  A reflector may be attached to the side surface of the top boom 4d, and the boom tip lamp 9 may be attached so as to illuminate the reflector.

  You may attach the camera for seeing the left-right direction to the bracket 12 of 3rd Embodiment.

  Although a four-stage boom has been described, the present invention is not limited to this, and a three-stage boom or a boom having five or more stages may be used.

1 is an overall view of a mobile crane according to the present invention. It is a left view of the boom front end of FIG. It is a right view of the boom front end of FIG. FIG. 2 is a front view of FIG. 1. It is a left view of the boom front end of 2nd Embodiment which concerns on invention of this application. It is a right view of the boom front end of 2nd Embodiment which concerns on invention of this application. It is a mobile crane front view of 2nd Embodiment which concerns on invention of this application. It is a left view of the boom front end of 3rd Embodiment which concerns on invention of this application. It is a mobile crane whole view with which the boom tip light which concerns on a prior art was attached. It is an enlarged view of the boom front end of FIG.

Explanation of symbols

1: traveling body 4: boom 4a: base boom 4b: second boom 4c: third boom 4d: top boom 9: boom tip light 10a: auxiliary boom 10b: auxiliary boom 12: bracket

Claims (4)

In a mobile crane having a boom that can be extended and retracted and raised on a traveling body, and the boom front end projects from the front end of the traveling body in a traveling posture in which the boom is fully contracted and laid down, A mobile crane with a boom tip light attached. In the mobile crane in which the auxiliary boom is integrally attached to the tip of the boom and the auxiliary boom serves as the front end in the running posture, the boom tip light is positioned at a position substantially below the left and right side surfaces of the auxiliary boom. A mobile crane, characterized in that it is mounted on. In a mobile crane provided with a boom that can be expanded and contracted on a traveling body, and the boom front end projects from the front end of the traveling body in a traveling posture in which the boom is fully contracted and laid down,
The boom includes a proximal boom and a distal boom. The distal boom is telescopically inserted into the proximal boom so that the distal boom is extended and retracted from the proximal boom. A mobile crane characterized in that a boom tip light is attached to a substantially front end position of a bracket projecting to the substantially end portion of a mounting tip side boom on each of the left and right side surfaces. The mobile crane according to any one of claims 1 to 3, wherein the boom end lamp is turned on during traveling.

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