Heavy machinery working platform

Abstract

To provide an operation cradle for a heavy machine capable of easily forming a support surface to be horizontal or approximately horizontal on a slop surface.SOLUTION: An operation cradle 1 for a heavy machine is provided with a body part 11 and a load dispersion plate 12. The body part 11 comprises an upper surface 11t forming a support surface SF and a slop bottom surface 11b placed to face a slop surface IS with an angle A corresponding to a slop angle α of the slop surface IS when the heavy machine HM is installed on the slop surface IS. The load dispersion plate 12 has a tip part 12f projecting from a tip 11f of the body part 11 and placed on the slop surface ISm and has elasticity bending along the upper surface 11t of the body part 11 and the slop surface IS under the load of the heavy machine HM. The upper surface 11t of the body part 11 has an upper surface tip part 11tf and an upper surface rear part 11tr. The upper surface tip part 11tf is inclined relative to the upper surface rear part 11tr such that an angle between the upper surface tip part 11tf and the slop surface IS is larger than that between the upper rear part 11tr and the slope surface IS.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a working platform for heavy machinery.

Background Art

[0002] Conventionally, a horizontal installation structure of a crawler crane has been known. For example, Patent Document 1 below describes a horizontal installation structure for installing a crawler crane used on an inclined surface horizontally or substantially horizontally using an inclined base (Claim 1, Paragraph 0008, etc.). The inclined base includes a strip-shaped iron plate, a pair of support frames, and a pair of jack devices.

[0003] The strip-shaped iron plate is laid in the gradient direction of the inclined surface. The pair of support frames are respectively arranged along the side edge portions on both sides of the strip-shaped iron plate to support the side edge portions, and are arranged in parallel while maintaining an interval width in which the crawlers of the crawler crane can move. The pair of jack devices are installed outside each of the pair of support frames at the lower part in the gradient direction to raise and lower the support frames together with the strip-shaped iron plate.

[0004] Furthermore, this conventional horizontal installation structure includes a wedge-shaped camber member that is inserted and arranged from below in the gradient direction into the gap between the strip-shaped iron plate raised by jacking up with the jack device and the inclined surface. This wedge-shaped camber member has an inclination angle corresponding to the inclination angle of the inclined surface.

[0005] And in this conventional horizontal installation structure, a pair of inclined bases are respectively installed at the installation positions of the left and right pair of crawlers of the crawler crane, and the crawler crane is moved until the rear parts in the moving directions of the left and right pair of crawlers respectively ride on the strip-shaped iron plates of the pair of inclined bases. Then, by jacking up the lower parts in the gradient direction of the support frames with the jack devices, the strip-shaped iron plates on which the crawlers ride are arranged horizontally or substantially horizontally. And a wedge-shaped camber member is respectively inserted and arranged in the gap between the strip-shaped iron plate and the inclined surface generated by the jacking up to install the crawler crane horizontally or substantially horizontally.

[0006] In addition, a scaffolding material for a heavy machine for an inclined surface equipped with a self-propelling means is known. The scaffolding material for a heavy machine described in Patent Document 2 below has a substantially wedge-shaped contour in a side view, and in a state where a heavy machine is mounted thereon, the portion facing the crawler or wheels thereof is one side of the contour, and the portion facing the inclined surface of the inclined surface is the other side of the contour (Claims 3 and 6, Paragraphs 0015 and 0016, etc.).

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0008] In the conventional horizontal installation structure described in Patent Document 1 above, when installing a pair of inclined girders, it is necessary to lift a strip-shaped iron plate and a pair of support gantries with a crawler crane, and the installation work is complicated. In addition, while balancing the left and right strip-shaped iron plates on which the crawler crane is mounted, the lower part of the support gantry in the gradient direction must be jacked up by a jacking device respectively, and the horizontal installation work of the crawler crane becomes very complicated.

[0009] In addition, the conventional scaffolding material for a heavy machine described in Patent Document 2 above is premised on being used for a heavy machine equipped with a jacking device. Specifically, when using this conventional scaffolding material for a heavy machine, first, each jacking device provided in the lower traveling body of the crane is operated to jack up the crane so that the inclination of the crane is substantially eliminated. Thereafter, a scaffolding material for a heavy machine having a substantially wedge shape in plan view, which has been prepared in advance, is lifted by a phase crane and moved to the rear of the crane.

[0010] Then, with the acute-angled tip side of the scaffolding material for heavy machinery facing the crane in a side view, it is horizontally moved as it is, and a part near the tip of the scaffolding material for heavy machinery is inserted and submerged into the wedge-shaped space between the crawler bottom surface of the crane and the covering surface. That is, for installing this conventional scaffolding material for heavy machinery, in addition to a heavy machinery such as a crane that rides on the scaffolding material for heavy machinery, a crane for setting up the scaffolding material for heavy machinery is required.

[0011] The present disclosure provides a work platform for heavy machinery that can easily form a horizontal or nearly horizontal support surface on an inclined surface.

Means for Solving the Problem

[0012] One aspect of the present disclosure is a work platform for heavy machinery including a main body portion made of a foamed resin and a load dispersion plate installed on the main body portion. The main body portion has an upper surface that forms a horizontal or a support surface closer to horizontal than the inclined surface when installed on the inclined surface where the heavy machinery performs work, and an inclined bottom surface that is inclined at an angle corresponding to the inclination angle of the inclined surface with respect to the upper surface and is disposed opposite to the inclined surface. The load dispersion plate has a tip portion that protrudes from the tip of the main body portion disposed above the inclined direction of the inclined surface and is disposed on the inclined surface, and has elasticity to bend along the upper surface and the inclined surface of the main body portion under the load of the heavy machinery. The upper surface of the main body portion has an upper surface tip portion adjacent to the tip of the main body portion and an upper surface rear portion adjacent to the rear end of the main body portion opposite to the tip. The work platform for heavy machinery is characterized in that the upper surface tip portion is inclined with respect to the upper surface rear portion such that the angle between the upper surface tip portion and the inclined surface is larger than the angle between the upper surface rear portion and the inclined surface in a state where the main body portion is installed on the inclined surface.

[0013] In the working platform for heavy machinery of the above-described aspect, the main body portion that forms the support surface of the heavy machinery is made of foamed resin. Therefore, the main body portion made of foamed resin, which is lighter than metal or wood, can be carried by the operator himself / herself and installed on the inclined surface where a heavy machinery such as a crane performs work. Further, when installing the main body portion on the inclined surface, the inclined bottom surface of the main body portion provided by inclining at an angle corresponding to the inclination angle of the inclined surface with respect to the upper surface of the main body portion is opposed to the inclined surface. Thereby, a support surface that is horizontal or closer to horizontal than the inclined surface can be formed by the upper surface of the main body portion installed on the inclined surface. Note that the inclination angle of the inclined surface is the angle of inclination from the horizontal plane of the inclined surface.

[0014] Further, in the working platform for heavy machinery of the above-described aspect, the support surface formed by the upper surface of the main body portion supports the heavy machinery via a load dispersion plate installed on the main body portion. Thereby, the load of the heavy machinery performing work on the load dispersion plate is dispersed by the load dispersion plate and acts uniformly over a wide range of the upper surface of the main body portion where the load dispersion plate is installed. Therefore, according to the working platform for heavy machinery of the above-described aspect, stress concentration on the upper surface of the main body portion due to the load of the heavy machinery can be prevented, damage to the main body portion made of foamed resin can be prevented, and it becomes possible to support a heavy machinery with a large weight by the main body portion.

[0015] Further, when the working platform for heavy machinery of the above-described aspect installs the main body portion on the inclined surface, at the tip of the main body portion disposed on the upper side in the inclination direction of the inclined surface, the inclined surface and the upper surface of the main body portion are adjacent to each other. Here, the inclination direction of the inclined surface is the direction along the maximum inclination line of the inclined surface and is the direction in which the gradient of the inclined surface is the largest. In this state, the inclined surface is inclined at the inclination angle of the inclined surface or an angle close thereto with respect to the upper surface of the main body portion that is horizontal or closer to horizontal than the inclined surface. Further, the tip portion of the load dispersion plate installed on the upper surface of the main body portion protrudes from the tip of the main body portion and is disposed on the inclined surface.

[0016] Therefore, when the heavy machine moves from the inclined surface onto the main body of the work platform for the heavy machine, it rides on the tip of the load dispersion plate disposed on the inclined surface and then moves onto the load dispersion plate disposed on the main body. At this time, since the load dispersion plate has elasticity to bend along the upper surface of the main body and the inclined surface under the load of the heavy machine, the tip of the load dispersion plate is elastically deformed into a concave curved surface shape, increasing the contact area between the load dispersion plate and the heavy machine. Therefore, when the heavy machine rides onto the load dispersion plate installed on the main body from the inclined surface, the load acting on the load dispersion plate is dispersed, the stress acting on the tip of the main body from the load dispersion plate is reduced, and damage to the tip of the main body made of foamed resin can be prevented.

[0017] Furthermore, in the work platform for the heavy machine of the above aspect, the upper surface of the main body has an upper surface front end portion adjacent to the tip of the main body and an upper surface rear portion adjacent to the rear end of the main body on the side opposite to the tip of the main body. And in a state where the main body is installed on the inclined surface, the upper surface front end portion is inclined with respect to the upper surface rear portion such that the angle between the upper surface front end portion and the inclined surface is larger than the angle between the upper surface rear portion and the inclined surface. With such a configuration, the angles formed by the upper surface front end portion and the inclined surface and by the upper surface front end portion and the upper surface rear portion can be made closer to two right angles, that is, 180 degrees (π radians), than the angle formed by the upper surface rear portion and the inclined surface.

[0018] As a result, when the heavy machine moves from the inclined surface onto the main body of the work platform for the heavy machine, it rides on the tip of the load dispersion plate disposed on the inclined surface and then moves onto the load dispersion plate disposed on the upper surface front end portion of the main body. Thereby, a load dispersion plate that bends under the load of the heavy machine can be supported over a wider range of the upper surface including the upper surface front end portion and the upper surface rear portion of the main body, the load acting on the upper surface of the main body from the load dispersion plate can be dispersed, and the stress acting on the main body can be reduced. Therefore, damage to the main body made of foamed resin that supports the load of the heavy machine can be prevented.

[0019] Further, in the construction machine working platform of the above aspect, the main body portion may be divided into a plurality of divided blocks in at least one direction among the vertical direction orthogonal to the upper surface, the front-rear direction from the front end toward the rear end orthogonal to the vertical direction, or the left-right direction orthogonal to the vertical direction and the front-rear direction.

[0020] With such a configuration, it is possible to reduce the weight of each divided block constituting the main body portion of the construction machine working platform and facilitate the installation of the main body portion by hand. Also, the dimensions of each divided block can be reduced to facilitate transportation. Further, by increasing the number of divided blocks, a large main body portion that can be used for a large construction machine can be configured.

[0021] Further, in the construction machine working platform of the above aspect, the main body portion is divided into the plurality of divided blocks by one or more vertical division surfaces in the vertical direction, and in a state where the main body portion is arranged such that the upper surface forming the support surface is along a horizontal plane, the inclination angle of each of the vertical division surfaces may be smaller than the inclination angle of the inclined bottom surface of the main body portion.

[0022] With such a configuration, by increasing or decreasing the number of divided blocks stacked in the vertical direction according to the inclination angle of the inclined surface, it is possible to form a support surface that is horizontal or closer to horizontal than each inclined surface on a plurality of inclined surfaces having different inclination angles by the upper surface of the main body portion. In this case, the lower vertical division surface of each divided block can be used as the inclined bottom surface of the main body portion facing the inclined surface, and the upper vertical division surface of each divided block can be used as the upper surface of the main body portion forming the support surface.

[0023] Further, in the construction machine working platform of the above aspect, in the left-right direction, both ends of the load dispersion plate may be arranged inside both ends of the main body portion or both ends of each of the plurality of divided blocks.

[0024] With such a configuration, both end portions of the load distribution plate in the left-right direction do not protrude from both end portions of the main body portion or both end portions of each of a pair of divided blocks arranged with a gap therebetween, and the entire left-right direction of the load distribution plate is supported by the upper surface which is the support surface of the main body portion. Therefore, it is possible to prevent a heavy machine from getting on top of the end portion of the load distribution plate not supported by the support surface of the main body portion, and improve the stability of the heavy machine on the working platform for the heavy machine.

[0025] Further, in the working platform for a heavy machine of the above aspect, the main body portion is divided into the plurality of divided blocks by one or more front-back dividing surfaces in the front-back direction, and the load distribution plate may be divided into a plurality of divided plates at a position different from the front-back dividing surface of the main body portion in the front-back direction.

[0026] With such a configuration, each divided plate constituting the load distribution plate is disposed on the front-back dividing surface that divides the main body portion into a plurality of divided blocks in the front-back direction. Thereby, it is possible to prevent each of the divided blocks adjacent in the front-back direction from shifting in the vertical direction, the left-right direction, or the front-back direction, and improve the stability of the working platform for a heavy machine configured by the plurality of divided blocks.

[0027] Further, in the working platform for a heavy machine of the above aspect, the front end portion of the upper surface may have a concave curved surface shape that smoothly connects to the rear portion of the upper surface in a cross section parallel to the vertical direction perpendicular to the upper surface and parallel to the front-back direction from the front end to the rear end.

[0028] With such a configuration, when the heavy machine moves from the inclined surface onto the main body portion of the working platform for the heavy machine, it is possible to increase the contact area between the load distribution plate that deflects into a concave curved surface shape under the load of the heavy machine and the front end portion of the upper surface of the main body portion having the concave curved surface shape. Thereby, the load acting on the upper surface of the main body portion from the load distribution plate can be dispersed, and the stress acting on the main body portion can be reduced. Therefore, it is possible to prevent damage to the main body portion made of foamed resin that supports the load of the heavy machine.

[0029] In addition, in the heavy machinery working platform of the above aspect, the dimension along the front-rear direction of the front end portion of the upper surface may correspond to the dimension along the front-rear direction of the grounding portion of the heavy machinery. Specifically, the dimension along the front-rear direction of the front end portion of the upper surface can be, for example, 50% or more, 60% or more, 70% or more, 80% or more, or 90% or more of the dimension along the front-rear direction of the grounding portion of the heavy machinery.

[0030] With such a configuration, when the heavy machinery moves from the inclined surface onto the main body portion of the heavy machinery working platform, the contact area between the load dispersion plate that deflects in a concave curved surface shape under the load of the heavy machinery and the front end portion of the upper surface of the main body portion having the above concave curved surface shape can be more reliably increased. Thereby, the load acting on the upper surface of the main body portion from the load dispersion plate can be more reliably dispersed, and the stress acting on the main body portion can be reduced. Therefore, damage to the main body portion made of foamed resin that supports the load of the heavy machinery can be more reliably prevented.

[0031] In addition, the heavy machinery working platform of the above aspect may be provided with a resin-made anti-slip material laid on the load dispersion plate and having at least one of a plurality of concave portions and a plurality of convex portions.

[0032] With such a configuration, when the heavy machinery moves on the load dispersion plate installed on the main body portion of the heavy machinery working platform, slipping of the heavy machinery can be prevented by at least one of the plurality of concave portions and the plurality of convex portions of the resin-made anti-slip material laid on the load dispersion plate. Therefore, the stability of the heavy machinery working on the heavy machinery working platform can be improved.

Effects of the Invention

[0033] According to the present disclosure, it is possible to provide a heavy machinery working platform capable of easily forming a horizontal or nearly horizontal support surface on an inclined surface.

Brief Description of the Drawings

[0034]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0035] Hereinafter, embodiments of the work platform for heavy machinery according to the present disclosure will be described with reference to the drawings.

[0036] [Embodiment 1] FIG. 1 is a side view showing Embodiment 1 of the work platform for heavy machinery according to the present disclosure. FIG. 2 is a plan view of the work platform 1 for heavy machinery shown in FIG. 1. FIG. 3 is an enlarged view of the tip 11f of the main body 11 of the work platform 1 for heavy machinery shown in FIG. 1.

[0037] The work platform 1 for heavy machinery of the present embodiment is installed, for example, on both ends of a viaduct, at the entrance or exit of an elevated road, or on an inclined surface IS such as an uphill road, and forms a horizontal support surface SF that serves as a scaffold for a heavy machine HM that performs work on the inclined surface IS, or a support surface SF that is closer to horizontal than the inclined surface IS. Examples of the heavy machine HM that performs work on the work platform 1 for heavy machinery include, but are not particularly limited to, a crane that needs to be installed horizontally to lift materials with a rated load.

[0038] The work platform 1 for heavy machinery includes a main body 11 made of foamed resin and a load dispersion plate 12 installed on the main body 11. As the foamed resin constituting the main body 11, for example, expanded polystyrene is preferable in terms of being lightweight and easily ensuring the required strength, and its density is 15 kg / m 3 to 70 kg / m 3To that extent, it is more preferable from the viewpoints of strength and lightness. Further, as the foamed resin constituting the main body 11, other foamed molded articles such as polypropylene, rigid urethane, ABS resin, or vinyl chloride can be used. Also, the main body 11 may be provided integrally, or may be divided into a plurality of divided blocks 111.

[0039] The main body 11 can be divided into a plurality of divided blocks 111 in at least one direction among, for example, the vertical direction orthogonal to the upper surface 11t, the front-rear direction from the front end 11f to the rear end 11r of the main body 11 orthogonal to the vertical direction, or the left-right direction orthogonal to the vertical direction and the front-rear direction. Each figure shows a three-dimensional orthogonal coordinate system including an X axis parallel to the front-rear direction, a Y axis parallel to the left-right direction, and a Z axis parallel to the vertical direction.

[0040] In the examples shown in FIGS. 1 and 2, the main body 11 is divided into two in the front-rear direction by one front-rear dividing surface 112, and is also divided into two in the left-right direction, and is divided into a total of four divided blocks 111. More specifically, a pair of two divided blocks 111 arranged side by side in the front-rear direction are arranged at intervals in the left-right direction. The main body 11 is installed such that the interval D between the center lines C of the left and right pairs of these two front-rear divided blocks 111 coincides with, for example, the interval between the center lines of the left and right crawlers of the crane, which is the grounding portion FP of the heavy machine HM.

[0041] The planar shape of the two divided blocks 111 arranged in the front-rear direction is, for example, a rectangle with the front-rear direction as the longitudinal direction. Note that the main body 11 may be divided into three or more divided blocks 111 by two or more front-rear dividing surfaces in the front-rear direction. Also, the main body 11 may be divided into three or more divided blocks 111 by two or more left-right dividing surfaces in the left-right direction. In this case, the plurality of divided blocks 111 arranged in the left-right direction may be arranged side by side without an interval in the left-right direction.

[0042] The load distribution plate 12 is, for example, a rigid rectangular plate-like member installed on the main body 11. In the example shown in Fig. 2, the load distribution plate 12 has a rectangular planar shape with the longitudinal direction in the front-rear direction of the main body 11. The material of the load distribution plate 12 is not particularly limited, but for example, a material having sufficient strength against the load of the heavy machine HM such as a resin material, a steel material, a concrete material, a fiber-reinforced resin material, a wood-based synthetic material, a synthetic rubber, a rubber-containing resin material, etc. can be selected.

[0043] The load distribution plate 12 has a tip portion 12f that protrudes from the tip 11f of the main body 11 disposed above the upper side in the inclination direction Dd of the inclined surface IS and is disposed on the inclined surface IS. Here, the inclination direction Dd of the inclined surface IS is the direction along the maximum inclination line of the inclined surface IS, and is the direction in which the gradient of the inclined surface IS is the maximum. Further, the load distribution plate 12 has an elasticity that deflects along the upper surface 11t of the main body 11 and the inclined surface IS when receiving the load of the heavy machine HM. Here, the elasticity that deflects along the upper surface 11t of the main body 11 and the inclined surface IS means that when the load distribution plate 12 receives the load of the heavy machine HM, the portion that had a space between the upper surface 11t of the main body 11 and the inclined surface IS can be elastically deformed so as to approach the upper surface 11t of the main body 11 and the inclined surface IS.

[0044] Also, the load distribution plate 12 is divided into a plurality of divided plates 121 at positions different from the front-rear dividing surface 112 of the main body 11, for example, in the front-rear direction of the main body 11. In the example shown in Fig. 2, the load distribution plate 12 is divided into three divided plates 121 in the front-rear direction, but the number of divisions of the divided plates 121 is not particularly limited.

[0045] Also, in the example shown in FIG. 2, the load distribution plate 12 is divided into two divided plates 121 in the left - right direction, similar to the divided blocks 111 of the main body 11, and the left and right divided plates 121 are arranged with a gap therebetween. Also, in the left - right direction, both ends of the load distribution plate 12 are arranged inside both ends of the main body 11. More specifically, pairs of three divided plates 121 arranged in the front - rear direction are arranged with a gap therebetween left and right, and are arranged on pairs of two divided blocks 111 arranged in the front - rear direction. And in the left - right direction, both ends of each divided plate 121 are arranged inside both ends of each divided block 111.

[0046] The main body 11 has an upper surface 11t and an inclined bottom surface 11b, and has a wedge - like shape in side view. The upper surface 11t of the main body 11 forms a support surface SF that is horizontal or closer to horizontal than the inclined surface IS when the main body 11 is installed on the inclined surface IS where the heavy machine HM performs work. The inclined bottom surface 11b of the main body 11 is provided by being inclined at an angle A corresponding to the inclination angle α of the inclined surface IS with respect to the upper surface 11t of the main body 11, and is arranged opposite to the inclined surface IS.

[0047] Here, the inclination angle α of the inclined surface IS is the angle of inclination of the inclined surface IS from the horizontal plane. Also, the angle A corresponding to the inclination angle α of the inclined surface IS includes, for example, an angle equal to the inclination angle α of the inclined surface IS and an angle whose difference from the inclination angle α of the inclined surface IS is equal to or less than a predetermined threshold value. Such a threshold value is, for example, about 5% of the inclination angle α of the inclined surface IS.

[0048] The upper surface 11t of the main body 11 has an upper - surface front - end portion 11tf adjacent to the front end 11f of the main body 11 and an upper - surface rear - portion 11tr adjacent to the rear end 11r of the main body 11 on the side opposite to the front end 11f of the main body 11. In the state where the main body 11 is installed on the inclined surface IS, as shown in FIG. 3, the upper - surface front - end portion 11tf is inclined with respect to the upper - surface rear - portion 11tr such that the angle β between the upper - surface front - end portion 11tf and the inclined surface IS is larger than the angle γ between the upper - surface rear - portion 11tr and the inclined surface IS.

[0049] In the example shown in FIG. 3, the dimension Ld of the front end portion 11tf of the upper surface in the front-rear direction of the main body portion 11 is determined according to the thickness T of the tip 11f of the main body portion 11 and the inclination angle δ of the front end portion 11tf of the upper surface with respect to the rear portion 11tr of the upper surface. That is, the dimension Ld of the front end portion 11tf of the upper surface in the front-rear direction of the main body portion 11 is determined, for example, as Ld = T / tan δ.

[0050] Hereinafter, the operation of the construction work platform 1 for heavy machinery of the present embodiment will be described.

[0051] As described above, in the horizontal installation structure of the conventional crawler crane described in Patent Document 1, when installing a pair of inclined girders, it is necessary to lift the strip-shaped iron plate and the pair of support girders with a crawler crane, and the installation work is complicated. Further, while balancing the left and right strip-shaped iron plates on which the crawler crane is mounted, the lower part of the support girder in the gradient direction must be jacked up by a jacking device respectively, and the horizontal installation work of the crawler crane becomes very complicated.

[0052] Also, as described above, the conventional scaffolding material for heavy machinery described in Patent Document 2 is premised on being used for a heavy machinery equipped with a jacking-up device. Further, for installing this conventional scaffolding material for heavy machinery, in addition to a heavy machinery such as a crane that gets on the scaffolding material for heavy machinery, a crane for scaffolding installation is required.

[0053] In contrast, the heavy equipment work platform 1 of this embodiment includes a main body 11 made of foamed resin and a load dispersion plate 12 installed on the main body 11. The main body 11 has an upper surface 11t that forms a support surface SF that is horizontal or closer to horizontal than the inclined surface IS when the heavy machine HM is installed on the inclined surface IS where work is performed. Also, the main body 11 has an inclined bottom surface 11b that is inclined at an angle A corresponding to the inclination angle α of the inclined surface IS with respect to the upper surface 11t and is disposed opposite to the inclined surface IS. The load dispersion plate 12 has a tip portion 12f that protrudes from the tip 11a of the main body 11 disposed on the upper side in the inclination direction Dd of the inclined surface IS and is disposed on the inclined surface IS, and has elasticity to bend along the upper surface 11t of the main body 11 and the inclined surface IS when receiving the load of the heavy machine HM. The upper surface 11t of the main body 11 has an upper surface tip portion 11tf adjacent to the tip 11f of the main body 11 and an upper surface rear portion 11tr adjacent to the rear end 11r of the main body 11 on the side opposite to the tip 11f. And in a state where the main body 11 is installed on the inclined surface IS, the upper surface tip portion 11tf is inclined with respect to the upper surface rear portion 11tr so that the angle β between the upper surface tip portion 11tf and the inclined surface IS is larger than the angle γ between the upper surface rear portion 11tr and the inclined surface IS.

[0054] That is, in the heavy equipment work platform 1 of this embodiment, the main body 11 that forms the support surface SF of the heavy machine HM is made of foamed resin. Therefore, the main body 11 made of foamed resin, which is lighter than metal or wood, can be carried by the operator himself / herself and installed on the inclined surface IS where a heavy machine HM such as a crane performs work. Also, when installing the main body 11 on the inclined surface IS, the inclined bottom surface 11b of the main body 11, which is inclined at an angle A corresponding to the inclination angle α of the inclined surface IS with respect to the upper surface 11t of the main body 11, is opposed to the inclined surface IS. Thereby, the upper surface 11t of the main body 11 installed on the inclined surface IS can form a support surface SF that is horizontal or closer to horizontal than the inclined surface IS. Therefore, according to the heavy equipment work platform 1 of this embodiment, a support surface SF that is horizontal or close to horizontal can be easily formed on the inclined surface IS.

[0055] Further, in the heavy machinery work platform 1 of the present embodiment, the support surface SF formed by the upper surface 11t of the main body 11 supports the heavy machinery HM via the load distribution plate 12 installed on the main body 11. Thereby, the load of the heavy machinery HM that performs work on the load distribution plate 12 is dispersed by the load distribution plate 12 and acts uniformly on a wide range of the upper surface 11t of the main body 11 where the load distribution plate 12 is installed. Therefore, according to the heavy machinery work platform 1 of the present embodiment, it is possible to prevent stress concentration on the upper surface 11t of the main body 11 due to the load of the heavy machinery HM, prevent damage to the main body 11 made of foamed resin, and support the heavy machinery HM with a large weight by the main body 11.

[0056] Further, when the main body 11 of the heavy machinery work platform 1 of the present embodiment is installed on the inclined surface IS, at the tip 11f of the main body 11 disposed on the upper side in the inclination direction Dd of the inclined surface IS, the inclined surface IS and the upper surface 11t of the main body 11 are adjacent to each other. In this state, the inclined surface IS is inclined at an inclination angle α of the inclined surface IS or an angle close thereto with respect to the upper surface 11t of the main body 11 that is horizontal or closer to horizontal than the inclined surface IS. Further, the tip portion 12f of the load distribution plate 12 installed on the upper surface 11t of the main body 11 protrudes from the tip 11f of the main body 11 and is disposed on the inclined surface IS.

[0057] Therefore, when the heavy machinery HM moves from the inclined surface IS onto the main body 11 of the heavy machinery work platform 1, it rides on the tip portion 12f of the load distribution plate 12 disposed on the inclined surface IS and then moves onto the load distribution plate 12 disposed on the main body 11. At this time, since the load distribution plate 12 has elasticity to bend along the upper surface 11t of the main body 11 and the inclined surface IS under the load of the heavy machinery HM, the tip portion 12f of the load distribution plate 12 is elastically deformed into a concave curved surface shape, increasing the contact area between the tip portion 12f and the heavy machinery HM. Therefore, when the heavy machinery HM rides from the inclined surface IS onto the load distribution plate 12 installed on the main body 11, the load acting on the load distribution plate 12 is dispersed, the stress acting on the tip 11f of the main body 11 from the load distribution plate 12 is reduced, and damage to the tip 11f of the main body 11 made of foamed resin can be prevented.

[0058] Furthermore, in the heavy machinery work platform 1 of the present embodiment, the upper surface 11t of the main body 11 has an upper surface front end portion 11tf adjacent to the front end 11f of the main body 11 and an upper surface rear portion 11tr adjacent to the rear end 11r of the main body 11 on the side opposite to the front end 11f of the main body 11. And in a state where the main body 11 is installed on the inclined surface IS, the upper surface front end portion 11tf is inclined with respect to the upper surface rear portion 11tr such that the angle β between the upper surface front end portion 11tf and the inclined surface IS is larger than the angle γ between the upper surface rear portion 11tr and the inclined surface IS. With such a configuration, the angle β formed by the upper surface front end portion 11tf and the inclined surface IS and the angle δ formed by the upper surface front end portion 11tf and the upper surface rear portion 11tr can be made closer to two right angles, that is, 180 degrees (π radians), than the angle γ formed by the upper surface rear portion 11tr and the inclined surface IS.

[0059] As a result, when the heavy machinery HM moves from the inclined surface IS onto the main body 11 of the heavy machinery work platform 1, it rides on the front end portion 12f of the load dispersion plate 12 disposed on the inclined surface IS and then moves onto the load dispersion plate 12 disposed on the upper surface front end portion 11tf of the main body 11. Thereby, it is possible to support the load dispersion plate 12 that deflects under the load of the heavy machinery HM in a wider range of the upper surface 11t including the upper surface front end portion 11tf and the upper surface rear portion 11tr of the main body 11, disperse the load acting on the upper surface 11t of the main body 11 from the load dispersion plate 12, and reduce the stress acting on the main body 11. Therefore, it is possible to prevent damage to the main body 11 made of foamed resin that supports the load of the heavy machinery HM.

[0060] Also, in the heavy machinery work platform 1 of the present embodiment, the main body 11 is divided into a plurality of divided blocks 111 in at least one direction among the vertical direction perpendicular to the upper surface 11t, the front-rear direction from the front end 11f to the rear end 11r perpendicular to the vertical direction, or the left-right direction perpendicular to the vertical direction and the front-rear direction.

[0061] With such a configuration, it is possible to reduce the weight of the individual divided blocks 111 that make up the main body 11 of the heavy machinery working platform 1, facilitating the installation of the main body 11 by hand. Also, the dimensions of the individual divided blocks 111 can be made smaller, facilitating transportation. Moreover, by increasing the number of divided blocks 111, it is possible to configure a large main body 11 that can be used for a large heavy machinery HM.

[0062] Also, in the heavy machinery working platform 1 of the present embodiment, in the left - right direction, both ends of the load - distributing plate 12 are arranged inside both ends of the main body 11 or both ends of each of the plurality of divided blocks 111.

[0063] With such a configuration, both ends of the load - distributing plate 12 or the dividing plate 121 in the left - right direction do not protrude from both ends of the main body 11 or both ends of each of a pair of divided blocks 111 arranged with a gap therebetween, and the entire left - right direction of the load - distributing plate 12 is supported by the upper surface 11t which is the support surface SF of the main body 11. Therefore, it is possible to prevent the heavy machinery HM from riding on the ends of the load - distributing plate 12 that are not supported by the support surface SF of the main body 11, and improve the stability of the heavy machinery HM on the heavy machinery working platform 1.

[0064] Also, in the heavy machinery working platform 1 of the present embodiment, the main body 11 is divided into a plurality of divided blocks 111 by one or more front - rear dividing surfaces 112 in the front - rear direction. Also, the load - distributing plate 12 is divided into a plurality of dividing plates 121 at positions different from the front - rear dividing surfaces 112 of the main body 11 in the front - rear direction.

[0065] With such a configuration, each dividing plate 121 that makes up the load - distributing plate 12 is arranged on the front - rear dividing surface 112 that divides the main body 11 into a plurality of divided blocks 111 in the front - rear direction. Thereby, it is possible to prevent each of the adjacent divided blocks 111 in the front - rear direction from shifting in the up - down direction, left - right direction, or front - rear direction, and improve the stability of the heavy machinery working platform 1 configured by the plurality of divided blocks 111 of the main body 11.

[0066] As described above, according to the present embodiment, it is possible to provide a construction machine work platform 1 on which a support surface SF that is horizontal or nearly horizontal can be easily formed on the inclined surface IS.

[0067] [Embodiment 2] Next, referring to FIGS. 2 and 3 of the foregoing Embodiment 1 and referring to FIG. 4, Embodiment 2 of the construction machine work platform according to the present disclosure will be described. The construction machine work platform 1 of the present embodiment has the same configuration as the construction machine work platform 1 of the foregoing Embodiment 1 except for the configuration described below. Therefore, in the construction machine work platform 1 of the present embodiment, the same parts as those of the construction machine work platform 1 of the foregoing Embodiment 1 are denoted by the same reference numerals and the description thereof is omitted.

[0068] In the construction machine work platform 1 of the present embodiment, the main body 11 is divided into a plurality of divided blocks 111 by one or more vertical dividing surfaces 113 in the vertical direction. Further, in the construction machine work platform 1 of the present embodiment, in a state where the main body 11 is arranged such that the upper surface 11t of the main body 11 forming the support surface SF follows a horizontal plane, the inclination angle λ of each vertical dividing surface 113 is smaller than the inclination angle B of the inclined bottom surface 11b of the main body 11.

[0069] With such a configuration, by increasing or decreasing the number of divided blocks 111 stacked in the vertical direction according to the inclination angle ε of the inclined surface IS, on a plurality of inclined surfaces IS having different inclination angles ε, a support surface SF that is horizontal or closer to horizontal than each inclined surface IS can be formed by the upper surface 11t of the main body 11. In this case, the lower vertical dividing surface 113 of each divided block 111 can be used as the inclined bottom surface 11b of the main body 11 facing the inclined surface IS, and the upper vertical dividing surface 113 of each divided block 111 can be used as the upper surface 11t of the main body 11 forming the support surface SF.

[0070] As described above, according to the present embodiment, similarly to the foregoing Embodiment 1, it is possible to provide a construction machine work platform 1 on which a support surface SF that is horizontal or nearly horizontal can be easily formed on the inclined surface IS.

[0071] [Embodiment 3] Next, referring to FIGS. 5 and 6 by making reference to FIG. 3 of the aforementioned Embodiment 1, Embodiment 3 of the heavy machinery work platform according to the present disclosure will be described. The heavy machinery work platform 1 of the present embodiment has the same configuration as the heavy machinery work platform 1 of the aforementioned Embodiment 1, except for the configuration described below. Therefore, in the heavy machinery work platform 1 of the present embodiment, the same parts as those of the heavy machinery work platform 1 of the aforementioned Embodiment 1 are denoted by the same reference numerals, and the description thereof will be omitted.

[0072] As shown in FIG. 5, in the heavy machinery work platform 1 of the present embodiment, the upper surface tip portion 11tf has a concave curved surface shape that smoothly connects to the upper surface rear portion 11tr in a cross section parallel to the vertical direction (Z-axis direction) perpendicular to the upper surface 11t and parallel to the front-rear direction (X-axis direction) from the tip 11f to the rear end 11r of the main body portion 11.

[0073] With such a configuration, when the heavy machinery HM moves from the inclined surface IS onto the main body portion 11 of the heavy machinery work platform 1, the contact area between the load dispersion plate 12 that deflects into a concave curved surface shape under the load of the heavy machinery HM and the upper surface tip portion 11tf of the main body portion 11 having a concave curved surface shape can be increased. Thereby, the load acting on the upper surface 11t of the main body portion 11 from the load dispersion plate 12 can be dispersed, and the stress acting on the main body portion 11 can be reduced. Therefore, damage to the main body portion 11 made of foamed resin that supports the load of the heavy machinery HM can be prevented.

[0074] Also, in the heavy machinery work platform 1 of the present embodiment, the dimension Ld along the front-rear direction of the upper surface tip portion 11tf of the main body portion 11 may correspond to the dimension along the front-rear direction of the grounding portion FP of the heavy machinery HM. Specifically, the dimension Ld along the front-rear direction of the upper surface tip portion 11tf of the main body portion 11 can be, for example, 50% or more, 60% or more, 70% or more, 80% or more, or 90% or more of the dimension along the front-rear direction of the grounding portion FP of the heavy machinery HM, such as the crawler of a crane.

[0075] With such a configuration, when the heavy machine HM moves from the inclined surface IS onto the main body 11 of the working platform 1 for the heavy machine, the contact area between the load dispersion plate 12 that deflects in a concave curved shape under the load of the heavy machine HM and the upper surface tip portion 11tf of the main body 11 having the concave curved shape can be more reliably increased. As a result, the load acting on the upper surface of the main body 11 from the load dispersion plate 12 can be more reliably dispersed, and the stress acting on the main body 11 can be reduced. Therefore, damage to the main body 11 made of foamed resin that supports the load of the heavy machine HM can be more reliably prevented.

[0076] Also, in the working platform 1 for the heavy machine of the present embodiment, as shown in FIG. 6, the main body 11 and the load dispersion plate 12 are integrally provided without being divided from one end to the other end, which are arranged outside both ends of the heavy machine HM in the left - right direction. With such a configuration, the load acting from the heavy machine HM on the load dispersion plate 12 can be dispersed over a wider range of the upper surface 11t of the main body 11, the stress acting on the main body 11 can be reduced, and damage to the main body 11 made of foamed resin can be more reliably prevented.

[0077] Further, the working platform 1 for the heavy machine of the present embodiment is provided with, for example, as shown in FIG. 5, a resin - made anti - slip material 13 laid on the load dispersion plate 12 and having at least one of a plurality of concave portions and a plurality of convex portions. As the anti - slip material 13, for example, a single - sided convex type or single - sided concave type of Lipiboard (registered trademark) manufactured by Ohashi Co., Ltd., or a Durite (registered trademark) series or Super Durite (registered trademark) series manufactured by Keiyo Kogyo Co., Ltd. can be used.

[0078] With such a configuration, when the heavy machine HM moves on the load dispersion plate 12 installed on the working platform 1 for the heavy machine, slipping of the heavy machine HM can be prevented by at least one of the plurality of concave portions and the plurality of convex portions of the resin - made anti - slip material 13 laid on the load dispersion plate 12. Therefore, the stability of the heavy machine HM working on the working platform 1 for the heavy machine can be improved.

[0079] As described above, according to the present embodiment, similarly to the aforementioned Embodiment 1, it is possible to provide a construction machine work platform 1 on which a support surface SF that is horizontal or nearly horizontal can be easily formed on the inclined surface IS.

[0080] As described above, the embodiments of the construction machine work platform according to the present disclosure have been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and even if there are design changes or the like within the scope that does not deviate from the gist of the present disclosure, they are included in the present disclosure.

Explanation of Reference Numerals

[0081] 1 Construction machine work platform 11 Main body part 111 Divided block 112 Front - rear divided surface 113 Upper - lower divided surface 11b Inclined bottom surface 11f Tip 11r Rear end 11t Upper surface 11tf Tip of the upper surface 11tr Rear part of the upper surface 12 Load - distributing plate 121 Divided plate 12f Tip part 13 Anti - slip material A Angle B Inclination angle Dd Inclination direction FP Grounding part HM Construction machine IS Inclined surface Ld Dimension SF Support surface α Inclination angle β Angle γ Angle ε Inclination angle λ Inclination angle

Claims

1. A working platform for heavy machinery, comprising a main body made of foamed resin and a load dispersion plate installed on the main body, wherein the main body has an upper surface that forms a horizontal or nearly horizontal support surface when installed on an inclined surface where the heavy machinery operates, and an inclined bottom surface that is inclined at an angle corresponding to the inclination angle of the inclined surface and is disposed opposite to the inclined surface, the load dispersion plate has a tip portion that protrudes from the tip of the main body disposed above the inclined direction of the inclined surface and is disposed on the inclined surface, and has elasticity to bend along the upper surface and the inclined surface of the main body when receiving the load of the heavy machinery, the upper surface of the main body has an upper surface tip portion adjacent to the tip of the main body and an upper surface rear portion adjacent to the rear end of the main body opposite to the tip, A working platform for heavy machinery, characterized in that the upper surface tip portion is inclined with respect to the upper surface rear portion such that the angle between the upper surface tip portion and the inclined surface is larger than the angle between the upper surface rear portion and the inclined surface when the main body is installed on the inclined surface.

2. The working platform for heavy machinery according to claim 1, wherein the main body is divided into a plurality of divided blocks in at least one direction among the vertical direction perpendicular to the upper surface, the front-rear direction from the tip to the rear end perpendicular to the vertical direction, or the left-right direction perpendicular to the vertical direction and the front-rear direction.

3. The main body is divided into the plurality of divided blocks by one or more vertical division surfaces in the vertical direction, In a state where the main body is arranged such that the upper surface forming the support surface is along a horizontal plane, the inclination angle of each of the vertical division surfaces is smaller than the inclination angle of the inclined bottom surface of the main body. The working platform for heavy machinery according to claim 2.

4. The working platform for heavy machinery according to claim 2, wherein in the left-right direction, both ends of the load dispersion plate are disposed inside both ends of the main body or both ends of each of the plurality of divided blocks.

5. The main body is divided into the plurality of divided blocks by one or more front-rear division surfaces in the front-rear direction, The working platform for heavy machinery according to claim 2, wherein the load dispersion plate is divided into a plurality of divided plates at a position different from the front-rear division surface of the main body in the front-rear direction.

6. The upper surface tip portion has a concave curved surface shape that smoothly connects to the rear portion of the upper surface in a cross-section parallel to the vertical direction perpendicular to the upper surface and parallel to the front-rear direction from the tip to the rear end. The working platform for a heavy machine according to claim 1, characterized in that.

7. The dimension along the front-rear direction of the upper surface tip portion corresponds to the dimension along the front-rear direction of the grounding portion of the heavy machine. The working platform for a heavy machine according to claim 6, characterized in that.

8. The working platform for a heavy machine according to claim 1, characterized by comprising a resin anti-slip material laid on the load distribution plate and having at least one of a plurality of concave portions and a plurality of convex portions.

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