JP6121262B2 - Crawler crane - Google Patents

Description

  The present invention relates to a crawler crane, and more particularly, to a large crawler crane in which an upper swing body provided with a lattice boom is provided on an upper part of a lower traveling body that is driven by a crawler.

  An auxiliary fuel tank can be installed in addition to the standard fuel tank provided in the upper revolving structure as a construction machine in which the upper revolving structure is provided so as to be able to turn on the upper part of the lower traveling body equipped with a crawler for traveling, A hydraulic excavator that can be used for a long time operation is known (for example, see Patent Document 1).

JP 2011-42994 A

  However, since the auxiliary fuel tank described above is arranged in a storage box for storing repair tools, greasing devices, etc., there is a possibility that the storage box will be enlarged or the upper revolving structure may be enlarged. . In particular, large crawler cranes not only require large-capacity auxiliary fuel tanks, but also have restrictions on the overall height and width of the upper swing body due to dimensional restrictions during transportation. An auxiliary fuel tank could not be installed. In addition, depending on the location of the auxiliary fuel tank, there are problems such as obstructing the field of view during work and affecting the ventilation of the radiator.

  Therefore, the present invention provides a crawler crane provided with an auxiliary fuel tank that does not increase the size of the upper revolving structure or affect workability, and in particular disassembles and transports the lower revolving structure and the upper revolving structure. It aims to provide such a large crawler crane.

  In order to achieve the above object, a crawler crane of the present invention is provided with a pair of left and right boom support brackets provided on an upper part of a lower traveling body provided with a crawler so as to be capable of turning, and provided on the front surface of the upper turning body. In the crawler crane in which the base end portion of the lattice boom is pivotally attached to an auxiliary fuel tank, an auxiliary fuel tank support member is provided in front of the upper swing body between the pair of boom support brackets, and the auxiliary fuel tank support member supports the auxiliary fuel. The tank is supported, and the lower part of the main fuel tank provided as a standard on the upper swing body and the lower part of the auxiliary fuel tank are communicated with each other through a communication pipe.

  In the crawler crane of the present invention, the auxiliary fuel tank uses a fuel tank having the same shape as the main fuel tank, and the upper surface and the bottom surface of the auxiliary fuel tank are flush with the upper surface and the bottom surface of the main fuel tank. The auxiliary fuel tank is provided with a refueling port detachably mounted with a cap having an air vent function, and the auxiliary fuel tank is provided in a tank housing box having a detachable lid. It is characterized by being supported by the auxiliary fuel tank support member while being accommodated in the container.

  According to the crawler crane of the present invention, the auxiliary fuel tank is added between the pair of left and right boom support brackets provided on the front surface of the upper swing body. Will not be affected. Especially when a large-capacity auxiliary fuel tank is added to a large crawler crane that separates and transports the upper revolving unit from the lower traveling unit, it may affect transportation and hinder the visibility during work. There is nothing to do.

  Furthermore, by making the main fuel tank and the auxiliary fuel tank into the same shape, it is possible to make the fuel tanks common and to suppress the increase in cost when adding the auxiliary fuel tank. In addition, by making the top and bottom surfaces of the main fuel tank and the auxiliary fuel tank the same height, the upper communication pipe can be omitted, and a refueling port fitted with a cap having an air vent function is detachably attached to the auxiliary fuel tank. By providing the upper portion, it is possible to improve the oil supply performance and shorten the oil supply time. Furthermore, the auxiliary fuel tank can be protected by accommodating the auxiliary fuel tank in the tank storage box.

It is a principal part top view of the crawler crane which shows one example of this invention. It is a principal part front view of a crawler crane similarly. It is a principal part side view of a crawler crane similarly. It is IV-IV sectional drawing of FIG. It is a side view of the crawler crane which shows one example of this invention.

  FIGS. 1 to 5 show an embodiment of the crawler crane of the present invention. The crawler crane 11 has a driver's cab 13 and an engine compartment 14 above a lower traveling body 12 provided with a crawler 12a for traveling. And a pair of left and right boom support brackets 16, 16 on both sides of the front surface of the vehicle body located between the cab 13 and the engine compartment 14 of the upper swing body 15. The lattice boom 17 is provided so as to be able to be raised and lowered via. Further, an elevating step 15a is provided at a front position of the engine compartment 14 located on the left side of the upper revolving body 15 and a standard main fuel tank for storing engine fuel is provided under the elevating step 15a. 18 and a radiator (not shown) are accommodated. Further, a pair of auxiliary fuel tank support members 19, 19 are provided between the left and right boom support brackets 16, 16 on the front surface of the upper swing body 15, and the auxiliary fuel tank support members 19, 19 are connected to the tank. An auxiliary fuel tank 21 accommodated in the accommodation box 20 is supported.

  The lattice boom 17 is connected to a lower boom 17a connected to the upper swing body 15 via the boom support brackets 16, 16, a middle boom 17b connected to the tip of the lower boom 17a, and a tip of the middle boom 17b. This is a well-known lattice boom composed of an upper boom 17c that is supported by a hoisting rope 22 unwound from a hoisting winch (not shown) and a pendant rope 23 connected to the tip of the upper boom 17c. .

  A pair of left and right connecting bases 24, 24 are formed at the base end portion of the lower boom 17a. The boom support brackets 16, 16 are provided at the base ends of the connector portions 24, 24, respectively. Are provided with connecting members 25 and 25 which are connected to each other in a rotatable manner. That is, the shape of the base end portion of the lower boom 17a is formed in a shape in which the vertical dimension gradually converges toward the connecting members 25, 25 without changing the widthwise dimension, and the left and right connecting base parts 24, 24, A space larger than the tank storage box 20 exists between the horizontal frame 24a located at the lower end of the boom and the pair of left and right oblique frames 24b, 24b.

  The main fuel tank 18 and the auxiliary fuel tank 21 are well-known rectangular parallelepiped tanks provided with refueling ports 18b and 21b to which caps 18a and 21a having an air vent function are mounted on the upper side, respectively. 18 and the engine are connected by a pair of fuel pipes (not shown) on the supply side and the return side. The auxiliary fuel tank 21 has the same shape and structure as the main fuel tank 18 except that the fuel pipe is not connected. The lower part of the main fuel tank 18 and the lower part of the auxiliary fuel tank 21 communicate with each other. 26 is connected.

  The capacity of the tanks used for the main fuel tank 18 and the auxiliary fuel tank 21 is generally set to a fuel consumption amount corresponding to the operation time of the crawler crane 11 from morning to evening. It is set to be able to cope with various working hours. Therefore, by adding the same auxiliary fuel tank 21, an oil-free operation that is twice or more the general operation time is possible.

  The auxiliary fuel tank support member 19 that supports the auxiliary fuel tank 21 includes a vertical mounting plate portion 19a fixed by a fixing means such as welding along the front surface of the upper swing body 15, and a lower end of the mounting plate portion 19a. It is formed of an L-shaped member having a support plate portion 19b protruding in the horizontal direction toward the front. The tank housing box 20 having a size capable of housing the auxiliary fuel tank 21 is attached on the support plate portion 19b. The bottom surface and the top surface of the auxiliary fuel tank 21 are the bottom surface and the top surface of the main fuel tank 18. And mounted in the upper revolving body 15 via the auxiliary fuel tank support member 19 in a state of being accommodated in the tank accommodating box 20 so as to be the same height as. The upper opening of the tank storage box 20 is covered with an openable / closable lid member 20a.

  In this way, in the crawler crane 11 provided with the lattice boom 17, the auxiliary fuel tank 21 is attached to the front surface of the upper swing body 15 using the space existing at the base end portion of the lower boom 17 a, thereby Compared to the case where an auxiliary fuel tank is provided, the view during operation is not obstructed and the ventilation of the radiator is not affected. Especially, even in the case of a large crawler crane, the addition of the auxiliary fuel tank 21 is possible. Since the total height of the upper swing body 15 does not increase, the upper swing body 15 can be transported as usual.

  Further, by using the tanks having the same shape for the main fuel tank 18 and the auxiliary fuel tank 21, the fuel tank can be shared. Further, the auxiliary fuel tank 21 is added by attaching the auxiliary fuel tank support member 19 to the front surface of the upper swing body 15 and supporting the auxiliary fuel tank 21 accommodated in the tank accommodation box 20 by the auxiliary fuel tank support member 19. Since the lower portion of both tanks can be simply connected by the communication pipe 26, it is not necessary to make a major modification to the upper swing body 15, and the auxiliary fuel tank 21 can be easily added to the crawler crane of the standard configuration. In addition, the cost increase when adding the auxiliary fuel tank 21 can be minimized, and continuous operation for a long time is possible while maintaining the same workability as the crawler crane of the standard configuration.

  Further, the fuel tanks 18 and 21 are arranged so that the upper surfaces and the bottom surfaces of the main fuel tank 18 and the auxiliary fuel tank 21 are at the same height, and the lower portions of both the fuel tanks 18 and 21 are connected by the communication pipe 26. At the same time, by attaching caps 18a and 21a having an air venting function to the fuel filler ports 18b and 21b, respectively, the fuel to the main fuel tank 18 and the auxiliary fuel tank 21 can be supplied from either one of the fuel filler ports 18b and 21b. This can be arbitrarily performed simultaneously from the oil supply ports 18b, 21b, can be adapted to the oil supply facility, and the oil supply time can be shortened. In addition, by storing the auxiliary fuel tank 21 in the tank storage box 20, the auxiliary fuel tank 21 can be protected.

  In the above embodiment, an example in which the auxiliary fuel tank is the same as the main fuel tank has been described. However, a fuel tank having an appropriate size is used according to the size of the space existing in the connecting base portion of the lower boom. It can be used as an auxiliary fuel tank, and the height of the bottom surface may be different. The upper part of the tank can also be connected with a communication pipe. Furthermore, the support structure of the auxiliary fuel tank can adopt an optimum structure as appropriate according to the shape and weight of the auxiliary fuel tank.

  DESCRIPTION OF SYMBOLS 11 ... Crawler crane, 12 ... Lower traveling body, 12a ... Crawler, 13 ... Driver's cab, 14 ... Engine compartment, 15 ... Upper turning body, 15a ... Elevating step, 16 ... Boom support bracket, 17 ... Lattice boom, 17a ... Lower boom , 17b ... Middle boom, 17c ... Upper boom, 18 ... Main fuel tank, 18a ... Cap, 18b ... Filling port, 19 ... Auxiliary fuel tank support member, 19a ... Mounting plate part, 19b ... Support plate part, 20 ... Tank accommodation Box, 20a ... Lid, 21 ... Auxiliary fuel tank, 21a ... Cap, 21b ... Refueling port, 22 ... Relief rope, 23 ... Pendant rope, 24 ... Connection base, 24a ... Horizontal frame, 24b ... Diagonal frame, 25 ... Connection Member, 26 ... Communication pipe

Claims (5)

  The upper revolving unit is provided on the upper part of the lower traveling unit provided with the crawler so as to be rotatable, and the base end portion of the lattice boom is pivotally attached to the pair of left and right boom support brackets provided on the front surface of the upper revolving unit. In the crawler crane, an auxiliary fuel tank support member is provided on the front surface of the upper swing body between the pair of boom support brackets, and the auxiliary fuel tank is supported by the auxiliary fuel tank support member. A crawler crane characterized in that a lower part of a main fuel tank and a lower part of the auxiliary fuel tank are connected by a communication pipe.   The crawler crane according to claim 1, wherein a fuel tank having the same shape as the main fuel tank is used as the auxiliary fuel tank.   The crawler crane according to claim 1 or 2, wherein an upper surface and a bottom surface of the auxiliary fuel tank are set at the same height as an upper surface and a bottom surface of the main fuel tank.   The crawler crane according to any one of claims 1 to 3, wherein the auxiliary fuel tank is provided with a fuel filler port on which a cap having an air vent function is detachably attached.   5. The auxiliary fuel tank is supported by the auxiliary fuel tank support member in a state of being accommodated in a tank housing box having a detachable lid member. 6. Crawler crane.

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