JP2016074519A - Lateral guard of mobile crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lateral guard of a mobile crane, which can prevent serious damage to a component of a vehicle body.SOLUTION: A lateral guard includes a guard member 32 which is provided in a part except an end of a plate-like member and which is provided with an overhanging part 32b overhanging to the width-direction inside of a vehicle body with respect to the end of the plate-like member.SELECTED DRAWING: Figure 3

Description

  The present invention relates to, for example, a side guard that surrounds a hydraulic oil tank provided on the side of a mobile crane from the outside in the width direction.

  In the mobile crane, a fuel tank for storing fuel for driving the engine and a hydraulic oil tank for storing hydraulic fluid for driving the actuator are provided on the side surface in the width direction of the vehicle body.

  Conventionally, as a side guard of this type of mobile crane, one having a plate-like member extending in the front-rear direction at intervals from the outer surface of a fuel tank or a hydraulic oil tank is known (see, for example, Patent Document 1). ).

  The mobile crane increases in size as the maximum lifting capacity of the crane device increases. For this reason, the mobile crane improves the workability in a narrow land and the traveling property during road traveling by reducing the size of the vehicle body in the width direction as much as possible.

  As a method of reducing the width direction dimension of the mobile crane body, it is conceivable to reduce the distance between the lateral surface of the fuel tank or hydraulic oil tank in the width direction and the side guard.

JP 2014-133493 A

  However, in order to ensure the rigidity of the plate-like member, the side guard is bent so that the end portion in the vertical direction of the plate-like member faces inward in the width direction of the vehicle body. Therefore, in the side guard, when stress is applied from the outside in the width direction of the vehicle body to the inside, such as when another vehicle collides, the side guard is deformed and the end of the plate-like member becomes the fuel tank or hydraulic oil tank. There is a risk of serious damage such as perforations in the fuel tank or hydraulic oil tank. Further, in the side guard, when the fuel tank or the hydraulic oil tank expands due to a change in temperature, the outer surface of the fuel tank or the hydraulic oil tank comes into contact with the end portion of the plate-like member, and vibration during traveling of the mobile crane May cause serious damage such as a hole in the fuel tank or hydraulic oil tank. Therefore, in the mobile crane having the side guard, it is not easy to reduce the size in the width direction of the vehicle body.

  An object of the present invention is to provide a side guard for a mobile crane that can prevent serious damage to the components of the vehicle body.

  In order to achieve the above object, the present invention provides a side guard that surrounds a vehicle body component located on a side face of a vehicle body, the side guard provided on a portion excluding an end of a plate-like member, It has a guard member provided with an overhanging portion that protrudes inside the vehicle body from the end of the member.

  As a result, when a guard member is deformed due to stress acting from the outside in the width direction of the vehicle body, such as when another vehicle collides, or when the temperature of the fuel tank or hydraulic oil tank as a component of the vehicle body changes When the expansion is caused by the above, the projecting portion, not the end portion of the plate-like member, comes into contact with the components of the vehicle body, so that serious damage to the vehicle component due to the side guard is prevented.

  According to the present invention, when a guard member is deformed due to stress acting from the outside in the width direction of the vehicle body, such as when another vehicle collides, or when the fuel tank or hydraulic oil tank as a component of the vehicle body is When it expands due to changes in temperature, it can prevent serious damage to the car body components due to the side guard, so the distance between the car body components and the side guard is reduced to reduce the width dimension of the car body. It becomes possible.

It is a side view of the mobile crane which shows one Embodiment of this invention. It is sectional drawing which shows the positional relationship of a fuel tank, a hydraulic oil tank, and a side guard. It is sectional drawing of a guard member. It is sectional drawing of the guard member which shows other embodiment of this invention. It is sectional drawing of the guard member which shows other embodiment of this invention.

  1 to 3 show an embodiment of the present invention.

  As shown in FIG. 1, the mobile crane 1 including the side guard of the present invention includes a traveling vehicle body 10 and a crane device 20.

  The vehicle body 10 includes a carrier frame 11 extending in the front-rear direction, a plurality of axles 12 disposed in the front-rear direction of the carrier frame 11, and wheels 13 provided at both ends of the axle 12. The vehicle body 10 travels with the power of the engine transmitted to at least some of the plurality of axles 12. Further, on both the left and right sides of the front side and the rear side of the vehicle body 10, outriggers 14 are provided for preventing the vehicle body 10 from overturning during crane operation and for stably supporting the vehicle body 10.

  The crane apparatus 20 includes a swivel base 21 that is turnable in a horizontal direction at a center portion in the front-rear direction of the vehicle body 10, a boom 22 that is provided so as to be able to rise and fall with respect to the swivel base 21, and is extendable. An operation cabin 23 is provided on the swivel base 21 and performs an operation related to traveling of the vehicle body 10 and an operation related to the crane device 20.

  The swivel base 21 is provided so as to be turnable with respect to the vehicle body 10 by a turning circle (not shown) of a ball bearing type or a roller bearing type, and is turned by a hydraulic drive turning motor (not shown).

  The boom 22 includes a plurality of boom members 22a, and a boom member 22a adjacent to the distal end side is provided inside the boom member 22a so as to be housed. A hydraulically-driven telescopic cylinder (not shown) is provided in the boom member (base boom) 22a on the most proximal end side, and the boom 22 is expanded and contracted by the expansion and contraction of the telescopic cylinder. Further, the most proximal end boom member 22 a has a proximal end portion connected to the bracket 21 a of the swivel base 21 so as to be rotatable in the vertical direction. Both ends of a hydraulically driven hoisting cylinder are connected to the central portion of the boom member 22a in the extending direction and the bracket 21a, and the boom 22 performs hoisting operation by extension and contraction of the hoisting cylinder.

  The driving cabin 23 is provided on the upper surface of the swivel base 21 located on the right side of the bracket 21a. The operation cabin 23 is formed in a box shape, and is provided with a seat, an operation lever, and the like on which an operator (not shown) is seated.

  Further, as shown in FIG. 2, a fuel tank 25 as a vehicle body component for storing fuel to be supplied to the engine is provided on one side in the width direction of the carrier frame 11 at the center in the front-rear direction of the vehicle body 10. It has been. Further, as shown in FIG. 2, hydraulic fluid supplied to hydraulically driven actuators such as a swing motor, a telescopic cylinder, and a hoisting cylinder is stored on the other side in the width direction of the carrier frame 11 at the center in the longitudinal direction of the vehicle body 10. A hydraulic oil tank 26 is provided as a component of the vehicle body for this purpose. The fuel tank 25 and the hydraulic oil tank 26 are hollow quadrangular columnar metal members that respectively extend in the front-rear direction on the outer side in the width direction of the carrier frame 11.

  As shown in FIG. 2, a side guard 30 is provided on the outer side in the width direction of the fuel tank 25 and the hydraulic oil tank 26 of the vehicle body 10 to protect the outer side in the width direction of the fuel tank 25 and the hydraulic oil tank 26. .

  The side guard 30 is provided at a distance from the outer surface in the width direction of the fuel tank 25 or the hydraulic oil tank 26. The side guard 30 includes a pair of front and rear brackets 31 disposed on both front and rear sides of the fuel tank 25 or the hydraulic oil tank 26, and a plurality of guard members 32 supported by the brackets 31 with a space in the vertical direction. have.

  Each bracket 31 is a member extending in the vertical direction, and the front and rear end portions of each guard member 32 are connected by welding, screwing, or the like.

  Each guard member 32 is a member extending in the front-rear direction between a pair of front and rear brackets, and is formed by deforming a rectangular plate-shaped member by press molding.

  As shown in FIG. 3, the guard member 32 has a bent portion 32 a in which both ends in the vertical direction, which is the short direction, are bent inward in the width direction of the vehicle body 10 in the front-rear direction, and the short direction. The center part of the up-down direction has the overhang | projection part 32b which protrudes in the width direction inner side rather than the edge part of the width direction inner side of the vehicle body 10 of the bending part 32a over the front-back direction.

  The bent portion 32 a is bent at both sides in the short direction of the plate-like member at a substantially right angle so that the end portion faces the inner side in the width direction of the vehicle body 10. The rigidity of the guard member 32 is enhanced by a bent portion 32a provided in the longitudinal direction.

  The overhanging portion 32b is formed by bending the central portion in the short direction of the plate-like member so as to have a substantially trapezoidal cross section. The overhang portion 32b is provided in a portion excluding the end portion of the plate-like member constituting the guard member 32, and overhangs inward in the width direction of the vehicle body 10 from the end portion of the plate-like member.

  The bent portion 32a protrudes from the portion excluding the bent portion 32a and the overhang portion 32b toward the inner side in the width direction of the vehicle body 10 by a first distance A1 (for example, 5 mm). The overhanging portion 32b protrudes from the portion excluding the bent portion 32a and the overhanging portion 32b with respect to the inner side in the width direction of the vehicle body 10 by a second distance A2 (for example, 10 mm) larger than the first distance A1. Yes.

  In the mobile crane configured as described above, the overhang portion 32b of the guard member 32 of the side guard 30 is located on the inner side in the width direction of the vehicle body 10 than the bent portion 32a and other portions. Therefore, when the guard member 32 is deformed due to stress acting from the outside in the width direction of the vehicle body 10 such as when another vehicle collides with the side surface of the vehicle body 10 in the width direction, the end of the bent portion 32a. First, the overhanging portion 32 b comes into contact with the fuel tank 25 and the hydraulic oil tank 26. For this reason, when the guard member 32 is deformed, the end of the plate-like member constituting the guard member 32 does not come into contact with the fuel tank 25 or the hydraulic oil tank 26, and the fuel tank 25 or the hydraulic oil tank 26 has a hole. Serious damage such as scratching is prevented.

  Further, when the fuel tank 25 or the hydraulic oil tank 26 expands due to a change in temperature, the fuel tank 25 or the hydraulic oil tank 26 comes into contact with the overhanging portion 32b before the end of the bent portion 32a. . For this reason, when the fuel tank 25 or the hydraulic oil tank 26 expands, the end of the plate-like member constituting the guard member 32 does not come into contact with the fuel tank 25 or the hydraulic oil tank 26. Serious damage such as perforation in the oil tank 26 is prevented.

  Thus, according to the side guard of the mobile crane of the present embodiment, the side guard 30 is provided in a portion excluding the end portion of the plate-like member, and is located on the inner side in the width direction of the vehicle body 10 than the end portion of the plate-like member. It has a guard member 32 provided with an overhanging portion 32b that projects over the surface.

  As a result, when the guard member 32 is deformed due to stress acting from the outside in the width direction of the vehicle body 10 such as when another vehicle collides, or when the fuel tank 25 or the hydraulic oil tank 26 expands due to changes in temperature. In this case, since the overhanging portion 32b can be brought into contact with the fuel tank 25 and the hydraulic oil tank 26 instead of the end portion of the plate-like member, serious damage to the fuel tank 25 and the hydraulic oil tank 26 by the side guard 30 can be prevented. Therefore, the distance between the fuel tank 25 or the hydraulic oil tank 26 and the side guard 30 can be reduced, and the width-direction dimension of the vehicle body 10 can be reduced.

  The guard member 32 is a rectangular plate-like member, and the overhanging portion 32 b is provided over the longitudinal direction of the guard member 32.

  As a result, the rigidity of the guard member 32 can be increased by the overhang portion 32b, and the protection performance of the fuel tank 25 and the hydraulic oil tank 26 can be improved.

  Further, the overhang portion 32 b is provided on the center side in the short direction of the guard member 32.

  As a result, it is possible to prevent contact between the end portions on both sides in the short direction with the fuel tank 25 and the hydraulic oil tank 26 by one overhanging portion 32b, and the fuel tank 25 and the hydraulic oil tank 26 can be formed in a simple shape. It becomes possible to protect.

  Next, a guard member having a different shape from the guard member 32 of the side guard 30 of the embodiment will be described.

  As in the above-described embodiment, the guard member 33 shown in FIG. 4 is provided with bent portions 33a on both ends in the short direction, and the width of the vehicle body 10 of the bent portion 33a is such that the center portion in the short direction extends in the front-rear direction. And a projecting portion 33b that projects inward in the width direction from the end portion in the direction direction.

  The overhang portion 33b is formed by bending the central portion in the short direction of the plate-like member into a substantially arc-shaped cross section.

  The bent portion 33a protrudes from the portion excluding the bent portion 33a and the overhang portion 33b toward the inner side in the width direction of the vehicle body 10 by a first distance A1 (for example, 5 mm). Further, the overhang portion 33b protrudes from the portion excluding the bent portion 33a and the overhang portion 33b with respect to the inner side in the width direction of the vehicle body 10 by a second distance A2 (for example, 10 mm) larger than the first distance A1. Yes.

  Also in the guard member 33 in which the overhang portion 33b is formed in this manner, the guard member 33 is subjected to stress from the outside in the width direction of the vehicle body 10 to the inside, such as when another vehicle collides, as in the above embodiment. When the fuel tank 25 or the hydraulic oil tank 26 expands due to a change in temperature, the projecting portion 33b is brought into contact with the fuel tank 25 or the hydraulic oil tank 26 instead of the end of the plate member. Therefore, serious damage of the fuel tank 25 and the hydraulic oil tank 26 by the side guard 30 can be prevented.

  Further, the guard member 34 shown in FIG. 5 is bent at a substantially right angle a plurality of times (three times in FIG. 5) over both sides in the short direction of the plate member in the front-rear direction. An overhang portion 34b is formed in a portion excluding. At this time, the end of the plate-like member faces the outside in the width direction of the vehicle body 10.

  The end portion of the plate-like member is located at a first distance A1 (for example, 5 mm) away from the center portion in the lateral direction toward the inner side in the width direction of the vehicle body 10. Further, the overhang portion 33b protrudes from the central portion in the short direction of the plate-like member with respect to the inner side in the width direction of the vehicle body 10 by a second distance A2 (for example, 10 mm) that is larger than the first distance A1. .

  Also in the guard member 34 with the overhang portion 34b formed in this way, as in the above-described embodiment, the guard member 34 is subjected to stress from the outside in the width direction of the vehicle body 10 to the inside, such as when another vehicle collides. When 34 is deformed, or when the fuel tank 25 or the hydraulic oil tank 26 expands due to a change in temperature, the projecting portion 34b is brought into contact with the fuel tank 25 or the hydraulic oil tank 26 instead of the end of the plate member. Therefore, serious damage of the fuel tank 25 and the hydraulic oil tank 26 by the side guard 30 can be prevented.

  The overhang portions 34 b are provided on both sides of the guard member 34 in the short direction.

  Thereby, since the overhang | projection part 34b formed by bending several times is located in the both sides of a transversal direction, the guard member 34 can be formed, without requiring the bending part for improving rigidity. Therefore, the fuel tank 25 and the hydraulic oil tank 26 can be protected with a simple shape.

  In the above embodiment, the fuel tank 25 and the hydraulic oil tank 26 are protected by the side guard 30, but the present invention is not limited to this. If it is a component located on the side surface side of the vehicle body 10, for example, the side guard of the present invention may be used to protect the members and components constituting the mobile crane 1 such as a steel pipe and a hose through which hydraulic oil flows. Good.

  Moreover, in the said embodiment, although the longitudinal direction of the guard member turned to the front-back direction of the vehicle body 10, and the short direction was turned to the up-down direction, the longitudinal direction of the guard member was turned up-down, and the short side direction was shown. Can be directed in the front-rear direction of the vehicle body 10.

  In the above-described embodiment, one overhang portion 32b, 33b is provided on the center side in the short direction of the guard member 32. However, the present invention is not limited to this. For example, you may make it form a several overhang | projection part continuously in the center part side of the transversal direction of a guard member.

  DESCRIPTION OF SYMBOLS 1 ... Mobile crane, 25 ... Fuel tank, 26 ... Hydraulic oil tank, 30 ... Side guard, 32 ... Guard member, 32b ... Overhang part, 33 ... Guard member, 33b ... Overhang part, 34 ... Guard member, 34b ... overhang.

Claims (4)

A side guard that surrounds the vehicle body components located on the side of the vehicle body,
The side guard is provided in a portion excluding an end portion of the plate-like member, and has a guard member provided with an overhang portion that protrudes to the inside of the vehicle body from the end portion of the plate-like member. Mobile crane side guard. The guard member is composed of a rectangular plate-shaped member,
The side guard of the mobile crane according to claim 1, wherein the overhang portion is provided in the longitudinal direction of the guard member. The side guard of the mobile crane according to claim 2, wherein the overhang portion is provided on a central portion side in the short direction of the guard member. The side guard of the mobile crane according to claim 2, wherein the overhang portions are provided on both sides of the guard member in the short direction.

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