Heavy object supporting and rotating apparatus

Abstract

To provide a heavy object supporting and rotating apparatus capable of performing various operations or processes such as welding on a long heavy object extending in a longitudinal direction.SOLUTION: An inner supporting and rotating mechanism is accommodated inside an outer supporting mechanism from an upper side of the outer supporting mechanism. The outer supporting mechanism is in an arcuate shape extending upward while being convex toward both left and right directions, and includes two outer arms that synchronously rotate in a direction in which distal ends approach each other from a state in which the distal ends are separated from each other, and in the reverse direction. The inner supporting mechanism is in the arcuate shape extending upward while being convex toward both left and right directions, and includes two inner arms that synchronously rotate with rotation of the right outer arm and left outer arm in a direction in which distal ends approach each other from an open state, and in the reverse direction. The inner supporting mechanism supports a heavy object in a horizontal direction which is the longitudinal direction between the two inner arms inside the outer supporting mechanism, and rotates the heavy object to a desired angle about an axis extending in the longitudinal direction.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] This invention relates to a heavy load support device equipped with a rotation mechanism, and more particularly to a heavy load support and rotation device that can support a long, longitudinally extending heavy load in the horizontal direction, rotate it by a desired angle around an axis extending in the longitudinal direction, and perform various operations and processes on the heavy load, such as welding, while the heavy load is rotated. [Background technology]

[0002] 2. Description of the Related Art Various proposals have been made in the past regarding devices for supporting, rotating, etc. heavy loads.

[0003] For example, Patent Document 1 proposes a heavy object support device equipped with a rotation mechanism that allows heavy objects such as LCD televisions and plasma televisions to be rotated left and right in their normal stationary state by operating them remotely or up close.

[0004] The inventors of the present application have also proposed a steel material rotating device that enables a workpiece made of steel material such as an H-beam to be safely rotated from 0 degrees to 360 degrees (Patent Document 2). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-150515 [Patent Document 2] Japanese Patent Publication No. 2023-181042 Summary of the Invention [Problem to be solved by the invention]

[0006] The object of this invention is to propose a heavy object support and rotation device that can support a long, heavy object extending in the longitudinal direction horizontally, rotate it to a desired angle around an axis extending in the longitudinal direction, and perform various tasks and processes on the heavy object, such as welding, while it is rotated. [Means for solving the problem]

[0007] The present invention can be exemplified as follows. [1] A heavy load support and rotation device for supporting and rotating a long heavy load extending in a longitudinal direction, wherein an inner support and rotation mechanism is housed inside an outer support mechanism from above the outer support mechanism, and the inner support and rotation mechanism is mounted on an upper part of a component of the outer support mechanism, the outer support mechanism includes a right outer arm and a left outer arm each having a base end at a lower end on the center side in the left-right direction, each having an arc shape extending upward while curving convexly in the left and right directions, and each of whose tips rotates synchronously around the base end in a direction from an open state in which the tip ends are separated from each other to a direction in which the tip ends approach each other and in the reverse direction, the inner support mechanism includes a right inner arm and a left inner arm, each having a base end at a lower end side on the center side in the left-right direction, each arc-shaped extending upward while being convex in both the left and right directions, and each tip of which rotates about the base end in synchronization with the rotation of the right outer arm and the left outer arm in a direction from an open state in which the tip ends are separated from each other to a direction in which the tip ends approach each other and in the opposite direction; The inner support mechanism rotates the heavy load by a desired angle around an axis extending in the longitudinal direction while supporting the heavy load between the right inner arm and the left inner arm in the horizontal direction, which is the longitudinal direction, inside the outer support mechanism. Heavy load support and rotation device.

[0008] [2] a right inner gear provided on the radially outer side of the right inner arm meshes from above with a right gear rotatably supported by the right outer arm; The left inner gear provided on the radially outer side of the left inner arm is engaged from above with the left gear rotatably supported by the left outer arm, The heavy load supporting and rotating device according to [1], wherein the right inner arm and the left inner arm rotate in synchronization with the rotation of the right outer arm and the left outer arm.

[0009] [3] A heavy load support and rotation device according to [1] or [2], wherein the outer support mechanism, the inner support and rotation mechanism, and the heavy load support and rotation device are all symmetrical about the center in the left-right direction.

[0010] [4] The outer support mechanism, the inner support and rotation mechanism, and the heavy load support and rotation device are all perpendicular to the left-right direction and are configured to be symmetrical in the front-to-back direction around the center in the front-to-back direction, which is the direction in which the supported heavy load extends. [3] A heavy load support and rotation device. [Effects of the Invention]

[0011] It is possible to provide a heavy object support and rotation device that can support a long, heavy object that extends in the longitudinal direction horizontally, rotate it to a desired angle around an axis extending in the longitudinal direction, and perform various tasks and processes on the heavy object, such as welding, while it is rotated. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a partially omitted front view of a basic form of a heavy load supporting and rotating device according to an embodiment of the present invention. [Figure 2] 1 is a partially omitted plan view illustrating an example of an outer support mechanism that constitutes a heavy load supporting and rotating device according to one embodiment of the present invention. [Figure 3]1 is a partially omitted plan view illustrating an example of an inner support and rotation mechanism that constitutes a heavy load support and rotation device according to one embodiment of the present invention. [Figure 4] In a heavy load supporting and rotating device according to one embodiment of the present invention, the inner support and rotating mechanism shown in Figure 3 is housed in the outer support mechanism from above the outer support mechanism shown in Figure 2, and the inner support and rotating mechanism is mounted above the outer support mechanism, forming a heavy load supporting and rotating device according to one embodiment of the present invention, with some parts omitted. [Figure 5] 1 is a schematic perspective view of an example of an inner support and rotation mechanism that constitutes a heavy load support and rotation device according to one embodiment of the present invention. [Figure 6] FIG. 1 is a partially omitted front view illustrating a state in which the right and left outer arms that make up the outer support mechanism are opened, and the right and left inner arms that make up the inner support and rotation mechanism are opened, making it possible to load a heavy object to be processed, in a heavy object support and rotation device according to one embodiment of the present invention. [Figure 7] FIG. 7 is a partially omitted front view illustrating the state in which an H-shaped steel beam, which is a heavy object to be processed, is loaded in the state shown in FIG. 6. [Figure 8] FIG. 8 is a diagram illustrating the outer support mechanism in the state shown in FIG. 7, with the right outer arm and left outer arm omitted. [Figure 9] FIG. 8 is a partially omitted front view illustrating a state in which the right and left outer arms that constitute the outer support mechanism are closed, and the right and left inner arms that constitute the inner support / rotation mechanism are closed, from the state in FIG. 7, and the H-shaped steel beam to be processed is supported by the right and left inner arms. [Figure 10] FIG. 10 is a diagram illustrating the outer support mechanism in the state shown in FIG. 9, with the gears provided on the right outer arm and the left outer arm omitted. [Figure 11] FIG. 11 is a diagram illustrating the outer support mechanism in the state shown in FIG. 10, with the right outer arm and left outer arm omitted. [Figure 12]This is a partially omitted front view illustrating that the inner support and rotation mechanism has been rotated 30 degrees clockwise from the state shown in Figure 10 and is now in a state where it can perform processing on the H-beam by maintaining that state. [Figure 13] This is a partially omitted front view illustrating that the inner support and rotation mechanism has been rotated a further 30 degrees clockwise from the state shown in Figure 12, and is now in a state where it can perform processing on the H-beam by maintaining that state. [Figure 14] (a) A front view illustrating an example of the state of the inner corners of the inner support / rotation mechanism in the state shown in Figure 11, (b) A front view illustrating an example of the state in which support auxiliary pieces are attached to each of the inner corners of the inner support / rotation mechanism shown in Figure 14(a). DETAILED DESCRIPTION OF THE INVENTION

[0013] The heavy load support and rotation device 100 (Fig. 1) of this embodiment is formed by housing an inner support and rotation mechanism 102 (Figs. 1 and 3) inside an outer support mechanism 101 (Figs. 1 and 2) from above the outer support mechanism 101, and mounting the inner support and rotation mechanism 102 on the upper side of the components of the outer support mechanism 101, and is capable of supporting and rotating a long heavy load extending in the longitudinal direction.

[0014] An example of the long heavy object extending in the longitudinal direction is a long heavy object such as an H-beam.

[0015] The heavy load support and rotation device 100 (Fig. 1) of this embodiment has a predetermined length (width) in the front-to-rear direction of the heavy load support and rotation device 100 (Fig. 1) (i.e., the direction from the front to the rear in Fig. 1, and the direction from the right to the left in Fig. 2), which corresponds to the longitudinal direction of the long, heavy load such as an H-beam that it supports and rotates. This predetermined length (width) can be set in various ways taking into consideration the length and weight of the long, heavy load to be handled in the longitudinal direction (= the front-to-rear direction of the heavy load support and rotation device 100 (Fig. 1)), but is, for example, about 1 m.

[0016] The outer support mechanism 101 (Figs. 1, 2, and 6) has a base end at the lower end of the center in the left-right direction perpendicular to the front-to-rear direction, i.e., the left-to-right direction in Figs. 1 and 6, and is arc-shaped extending upward while curving convexly in both the left and right directions, and is equipped with a right outer arm 5a and a left outer arm 6a whose tips rotate synchronously around the base end in a direction from an open state (Fig. 6) in which the tip ends are separated from each other to a direction in which the tip ends approach each other and in the reverse direction (Figs. 1, 2, and 6).

[0017] The inner support mechanism 102 (Figs. 1, 3, 5, and 6) has a base end at the lower end of the center in the left-right direction perpendicular to the front-to-rear direction, i.e., the left-to-right direction in Figs. 1 and 6, and is arc-shaped extending upward while curving convexly in both the left and right directions. The inner support mechanism 102 is equipped with a right inner arm 11a and a left inner arm 14a, each of whose tips rotate around the base end in synchronization with the rotation of the right outer arm 5a and the left outer arm 6a in the direction from an open state (Fig. 6) in which the tip ends are separated from each other to the direction in which the tip ends approach each other and in the reverse direction (Figs. 1, 3, 5, and 6).

[0018] The inner support mechanism 102 (Figures 5 and 6) supports the heavy load in the horizontal direction, i.e., the longitudinal direction, between the right inner arm 11a and the left inner arm 14a inside the outer support mechanism 101, and rotates the heavy load to a desired angle around an axis extending in the longitudinal direction.

[0019] Figure 9 is a partially omitted diagram illustrating a state in which the right outer arm 5a and the left outer arm 6a rotate around their respective base ends to bring their respective tips close to each other and into a closed state, and the right inner arm 11a and the left inner arm 14a rotate around their respective base ends to bring their respective tips close to each other and into a closed state, and the inner support mechanism 102 supports the H-beam 300, which is a long, heavy object extending in the longitudinal direction, in the horizontal direction, which is the longitudinal direction, inside the outer support mechanism 101, between the right inner arm 11a and the left inner arm 14a.

[0020] The inner support mechanism 102 (Figure 5) supports the H-beam 300, which is a long, heavy object, in the horizontal direction, i.e., the longitudinal direction, and can rotate the H-beam 300 to a desired angle, such as 30 degrees clockwise, around an axis extending in the longitudinal direction, as shown in Figure 12.

[0021] As will be described later, the heavy load support and rotation device 100 (Fig. 1) of this embodiment, and the outer support mechanism 101 (Figs. 1 and 2) and inner support and rotation mechanism 102 (Figs. 1 and 3) that constitute it, are all symmetrical in left-right direction with respect to a center line YY (Figs. 1 and 2) that extends in the up-down direction (= the up-down direction in Fig. 1) perpendicular to the front-to-back direction of the heavy load support and rotation device 100 (Fig. 1), which corresponds to the longitudinal direction of the long heavy loads such as H-beams that are supported and rotated, and are also symmetrical in front-to-back direction with respect to a center line XX (Figs. 2 and 3) that extends in the left-to-right direction (the left-to-right direction in Fig. 1).

[0022] Therefore, although only the right outer arm 5a and the left outer arm 6a are described above, the right outer arm 5a and the left outer arm 6a are bilaterally symmetrical with respect to the line YY (FIGS. 1 and 2), and the right outer arm 5b and the left outer arm 6b are arranged in front-to-back symmetry with respect to the line XX (FIG. 2) with respect to the right outer arm 5a and the left outer arm 6a, and the right outer arm 5b and the left outer arm 6b are bilaterally symmetrical with respect to the line YY (FIGS. 1 and 2).

[0023] In addition, although only the right inner arm 11a and the left inner arm 14a are described above, the right inner arm 11a and the left inner arm 14a are bilaterally symmetrical with respect to line YY (FIGS. 1 and 3), and the right inner arm 11b and the left inner arm 14b are arranged symmetrically from front to back with respect to line XX (FIG. 3) with respect to the right inner arm 11a and the left inner arm 14a, and the right inner arm 11b and the left outer arm 14b are bilaterally symmetrical with respect to line YY (FIGS. 1 and 2).

[0024] Hereinafter, in this specification, both the right outer arm 5a and the right outer arm 5b may be simply referred to as the right outer arm 5a or the right outer arm 5, both the left outer arm 6a and the left outer arm 6b may be simply referred to as the left outer arm 6a or the left outer arm 6, both the right inner arm 11a and the right inner arm 11b may be simply referred to as the right inner arm 11a or the right inner arm 11, and both the left inner arm 14a and the left inner arm 14b may be simply referred to as the left inner arm 14a or the left inner arm 14.

[0025] <Outer support mechanism 101> As shown in FIG. 2, the rotating shafts 3 and 4 of the outer support mechanism 101 (FIG. 2) are parallel to each other and extend in the vertical direction of FIG. 2 (the front-to-back direction of the drawing in FIG. 1), and are rotatably supported at both ends, i.e., the front end (lower side in FIG. 2) and rear end (upper side in FIG. 2) of the rotating shaft 3, and the front end (lower side in FIG. 2) and rear end (upper side in FIG. 2) of the rotating shaft 4, on a base (not shown) arranged below the heavy load supporting and rotating device 100 (FIG. 1).

[0026] A front right central gear 1a, a rear right central gear 1b, a front left central gear 2a, and a rear left central gear 2b are fixedly attached to the front and rear ends of the rotating shafts 3 and 4, respectively (Figures 1 and 2).

[0027] The front right central gear 1a, rear right central gear 1b, front left central gear 2a, and rear left central gear 2b each have the same shape and size.

[0028] The front right central gear 1a meshes with the front left central gear 2a (FIGS. 1 and 2), and the rear right central gear 1b meshes with the rear left central gear 2b (FIG. 2).

[0029] The front right central gear 1a on the front end side of the rotating shaft 3 is fixed to the lower end of the plate-shaped right outer arm 5a. As shown in Fig. 1, the plate-shaped right outer arm 5a has an arc shape that curves gently rightward from the lower end of the right outer arm 5a to which the front right central gear 1a is fixed and extends upward (upward in Fig. 1).

[0030] The rear right central gear 1b on the rear end side of the rotating shaft 3 is fixed to the lower end of the plate-shaped right outer arm 5b. Like the right outer arm 5a, the plate-shaped right outer arm 5b has an arc shape that curves gently rightward from the lower end of the right outer arm 5b to which the rear right central gear 1b is fixed and extends upward (upward in FIG. 1).

[0031] The front-left central gear 2a on the front end side of the rotating shaft 4 is fixed to the lower end of the plate-shaped left outer arm 6a. As shown in Figure 1, the plate-shaped left outer arm 6a has an arc shape that curves gently leftward from the lower end of the left outer arm 6a to which the front-left central gear 2a is fixed, and then extends upward (upward in Figure 1).

[0032] The rear-left central gear 2b on the rear end side of the rotating shaft 4 is fixed to the lower end of the plate-shaped left outer arm 6b. Like the left outer arm 6a, the plate-shaped left outer arm 6b has an arc shape that curves gently leftward from the lower end of the left outer arm 6b to which the rear-left central gear 2b is fixed, and then extends upward (upward in FIG. 1).

[0033] In the illustrated embodiment, as shown in FIG. 2, the front right central gear 1a is fixed to the lower end of the plate-shaped right outer arm 5a on the outside of the plate-shaped right outer arm 5a, and the rear right central gear 1b is fixed to the lower end of the plate-shaped right outer arm 5b on the outside of the plate-shaped right outer arm 5b.

[0034] As shown in FIG. 2, the front left central gear 2a is fixed to the lower end of the plate-shaped left outer arm 6a on the outside of the left outer arm 6a, and the rear left central gear 2b is fixed to the lower end of the plate-shaped left outer arm 6b on the outside of the left outer arm 6b.

[0035] 1 and 2, the plate-shaped right outer arm 5a is provided with a front right gear 7a on the inside of the right outer arm 5a in a region where the right outer arm 5a extends diagonally upward to form a convex curve toward the right, above the position where the front right central gear 1a is fixed to the right outer arm 5a. The front right gear 7a is rotatably supported around a rotation support shaft that protrudes inward from the plate-shaped right outer arm 5a.

[0036] Correspondingly, the plate-shaped right outer arm 5b is provided with a rear right gear 7b on the inside of the right outer arm 5b in a region where the right outer arm 5b extends diagonally upward to form a convex curve toward the right, above the position where the rear right central gear 1b is fixed to the right outer arm 5b, as shown in Figure 2. The rear right gear 7b is rotatably supported around a rotation support shaft that protrudes inward from the plate-shaped right outer arm 5b.

[0037] 1 and 2, the plate-shaped left outer arm 6a is provided with a front left gear 8a on the inside of the left outer arm 6a in a region where the left outer arm 6a extends diagonally upward to form a convex curve toward the left, above the position where the front left central gear 2a is fixed to the left outer arm 6a. The front left gear 8a is rotatably supported around a rotation support shaft that protrudes inward from the plate-shaped left outer arm 6a.

[0038] Correspondingly, the plate-shaped left outer arm 6b is provided with a rear left gear 8b on the inside of the left outer arm 6b in a region where the left outer arm 6b extends diagonally upward to form a convex curve toward the left, above the position where the rear left central gear 2b is fixed to the left outer arm 6b, as shown in Figure 2. The rear left gear 8b is rotatably supported around a rotation support shaft that protrudes inward from the plate-shaped left outer arm 6b.

[0039] As described above, the outer support mechanism 101 (FIG. 2) has a left-right symmetrical structure with respect to the center line YY (FIG. 2) extending in the up-down direction, and also has a front-to-back symmetrical structure (up-down symmetrical structure) with respect to the center line XX (FIG. 2) extending in the left-to-right direction.

[0040] The front right central gear 1a is fixed to the outer surface of the lower end, and the right outer arm 5a rotatably supports the front right gear 7a on its inner surface in the area extending diagonally upward and to the right above that position. The position, shape, structure and size of the right outer arm 5a, and the rear right central gear 1b are fixed to the outer surface of the lower end, and the right outer arm 5b rotatably supports the rear right gear 7b on its inner surface in the area extending diagonally upward and to the right above that position, are symmetrical in the front-rear direction (up-down direction in Figure 2) about the center line XX extending in the left-right direction (left-right direction in Figure 2).

[0041] The front-left central gear 2a is fixed to the outer surface of the lower end, and the left outer arm 6a rotatably supports the front-left gear 8a on its inner surface in an area extending diagonally upward and left from that position. The position, shape, structure and size of the left outer arm 6a are symmetrical in the front-rear direction (up-down direction in Figure 2) with respect to the center line XX extending in the left-right direction (left-right direction in Figure 2), and the rear-left central gear 2b is fixed to the outer surface of the lower end, and the left outer arm 6b rotatably supports the rear-left gear 8b on its inner surface in an area extending diagonally upward and left from that position.

[0042] Furthermore, the front right central gear 1a is fixed to the outer surface of the lower end, and the right outer arm 5a, which rotatably supports the front right gear 7a on its inner surface in the area extending diagonally upward and to the right above that position, is located at a position relative to the center line YY extending in the front-to-back direction (the up-and-down direction in Figure 2), as well as its shape, structure, and size.The front left central gear 2a is fixed to the outer surface of the lower end, and the left outer arm 6a, which rotatably supports the front left gear 8a on its inner surface in the area extending diagonally upward and to the left above that position, is located at a position relative to the center line YY extending in the front-to-back direction (the up-and-down direction in Figure 2), as well as its shape, structure, and size.

[0043] The rear right central gear 1b is fixed to the outer surface of the lower end, and the right outer arm 5b rotatably supports the rear right gear 7b on its inner surface in the area extending diagonally upward and to the right above that position. The position, shape, structure and size of the right outer arm 5b are located relative to the center line YY extending in the front-to-back direction (the up-and-down direction in Figure 2), and the rear left central gear 2b is fixed to the outer surface of the lower end, and the left outer arm 6b rotatably supports the rear left gear 8b on its inner surface in the area extending diagonally upward and to the left above that position. The position, shape, structure and size of the left outer arm 6b are located relative to the center line YY extending in the front-to-back direction (the up-and-down direction in Figure 2), and the size of the left outer arm 6b are symmetrical with respect to the center line YY extending in the front-to-back direction (the up-and-down direction in Figure 2).

[0044] <Inner support and rotation mechanism 102> The inner support and rotation mechanism 102 includes a central shaft 10 extending in the front-rear direction (vertical direction in FIG. 3) at the position of a center line YY extending in the front-rear direction (vertical direction in FIG. 3).

[0045] On the right side, the central shaft 10 rotatably supports the lower end 12a of the right inner arm 11a at the front side and the lower end 12b of the right inner arm 11b at the rear side (FIG. 3).

[0046] Furthermore, on the left side, the central shaft 10 rotatably supports the lower end 15a of the left inner arm 14a at the front side and the lower end 15b of the left inner arm 14b at the rear side (Figure 3).

[0047] The right inner arm 11a at the front end side of the central shaft 10 has an arc shape that curves gently convexly from the lower end 12a (Figs. 3 and 5) toward the right and extends upward (upward in Fig. 5) as shown in Fig. 5.

[0048] Correspondingly, the right inner arm 11b at the rear end side of the central shaft 10 also has an arc shape that curves gently convexly toward the right from the lower end 12b (Figure 3) and extends upward (upward in Figure 5), as shown in Figure 5.

[0049] The left inner arm 14a at the front end side of the central shaft 10 has an arc shape that curves gently convexly from the lower end 15a (FIG. 3) toward the left side and extends upward (upward in FIG. 5), as shown in FIG. 5.

[0050] Correspondingly, the left inner arm 14b at the rear end side of the central axis 10 also has an arc shape that curves gently convexly toward the left from the lower end 15b (Figure 3) and extends upward (upward in Figure 5), as shown in Figure 5.

[0051] The right inner arm 11a has a right inner gear 16a extending in the circumferential direction on its radially outer side (FIG. 5). The right inner arm 11b has a right inner gear 16b extending in the circumferential direction on its radially outer side (FIG. 5).

[0052] The left inner arm 14a has a left inner gear 17a extending in the circumferential direction on its radially outer side (FIG. 5). The left inner arm 14b has a left inner gear 17b extending in the circumferential direction on its radially outer side (FIG. 5).

[0053] As described above, the inner support / rotation mechanism 102 has a left-right symmetrical structure with respect to the center line YY (FIG. 3) extending in the up-down direction, and also has a front-to-back symmetrical structure (up-down symmetrical structure) with respect to the center line XX (FIG. 3) extending in the left-to-right direction.

[0054] Therefore, the position, shape, structure, and size of the right inner arm 11a, which is equipped with the right inner gear 16a extending circumferentially on the radially outer side, relative to the center line XX extending in the left-right direction (left-right direction in Figure 2), and the position, shape, structure, and size of the right inner arm 11b, which is equipped with the right inner gear 16b extending circumferentially on the radially outer side, relative to the center line XX extending in the left-right direction (left-right direction in Figure 2), are symmetrical in the front-to-back direction (vertical symmetry) with respect to the center line XX extending in the left-right direction (left-right direction in Figure 3).

[0055] Furthermore, the position, shape, structure and size of the left inner arm 14a, which is equipped with the right inner gear 17a extending circumferentially on the radially outer side, relative to the center line XX extending in the left-right direction (left-right direction in FIG. 2), and the position, shape, structure and size of the left inner arm 14b, which is equipped with the left inner gear 17b extending circumferentially on the radially outer side, relative to the center line XX extending in the left-right direction (left-right direction in FIG. 2), are symmetrical in the front-to-back direction (vertical symmetry) with respect to the center line XX extending in the left-right direction (left-right direction in FIG. 3).

[0056] Furthermore, the position, shape, structure and size of the right inner arm 11a, which is equipped with a right inner gear 16a extending circumferentially on the radially outer side, relative to the center line YY extending in the front-to-rear direction (up-to-down direction in Figure 2), and the position, shape, structure and size of the left inner arm 14a, which is equipped with a right inner gear 17a extending circumferentially on the radially outer side, relative to the center line YY extending in the front-to-rear direction (up-to-down direction in Figure 2), are symmetrical with respect to the center line YY extending in the front-to-rear direction (up-to-down direction in Figure 3).

[0057] In addition, the position, shape, structure and size of the right inner arm 11b, which is equipped with a right inner gear 16b extending circumferentially on the radially outer side, relative to the center line YY extending in the front-to-rear direction (up-to-down direction in Figure 2), and the position, shape, structure and size of the left inner arm 14b, which is equipped with a right inner gear 17b extending circumferentially on the radially outer side, relative to the center line YY extending in the front-to-rear direction (up-to-down direction in Figure 2), are symmetrical with respect to the center line YY extending in the front-to-rear direction (up-to-down direction in Figure 3).

[0058] <Attaching the inner support and rotation mechanism 102 (Fig. 3) to the inside of the outer support mechanism 101 (Fig. 2)> The inner support and rotation mechanism 102 (Fig. 3) is accommodated inside the outer support mechanism 101 (Fig. 2) from above, and the inner support and rotation mechanism 102 (Fig. 3) is mounted above the components of the outer support mechanism 101 (Fig. 2), thereby forming the heavy load support and rotation device 100 (Figs. 1 and 4). In this embodiment, the configuration is as follows:

[0059] The right inner gear 16a provided on the radially outer side of the right inner arm 11a meshes from above with the front right gear 7a rotatably supported by the right outer arm 5a, The right inner gear 16b provided on the radially outer side of the right inner arm 11b meshes from above with the rear right gear 7b rotatably supported by the right outer arm 5b, The left inner gear 17a provided on the radially outer side of the left inner arm 14a meshes from above with the front left gear 8a rotatably supported by the left outer arm 5a, A left inner gear 17b provided on the radially outer side of the left inner arm 14b meshes from above with a rear right gear 8b rotatably supported by the left outer arm 6b.

[0060] In this way, the inner support and rotation mechanism 102 (Fig. 3) is accommodated inside the outer support mechanism 101 (Fig. 2) from above, and the inner support and rotation mechanism 102 (Fig. 3) is mounted on the upper side of the components of the outer support mechanism 101 (Fig. 2), thereby forming the heavy load support and rotation device 100 (Figs. 1 and 4).

[0061] Therefore, in this embodiment, the right internal gear 16a, right internal gear 16b, front right gear 7a, rear right gear 7b, left internal gear 17a, left internal gear 17b, front left gear 8a, and rear right gear 8b are structured to enable the above-mentioned gear meshing.

[0062] <Preparing to load a long, heavy object that extends longitudinally> From the basic configuration shown in FIG. 1, the motor 110 mounted on a base (not shown) mounted on the underside of the heavy load support and rotation device 100 (FIG. 1) is driven to rotate the front right central gear 1a in the direction of the arrow 200a (FIG. 1).

[0063] The front right central gear 1a is fixed to a rotating shaft 3 that is rotatably supported on a base (not shown). Therefore, when the front right central gear 1a rotates in the direction of arrow 200a, the rotating shaft 3 rotates, and the rear right central gear 1b, which is fixed to the rotating shaft 3, also rotates in the direction of arrow 200a in synchronization with the rotation of the front right central gear 1a.

[0064] The front right central gear 1a is fixed to the lower end of the right outer arm 5a, and the rear right central gear 1b is fixed to the lower end of the right outer arm 5b. Therefore, in accordance with the synchronous rotation of the front right central gear 1a and the rear right central gear 1b in the direction of the arrow 200a, the right outer arms 5a and 5b rotate synchronously in the direction indicated by the arrow 200b around the position of the rotation shaft 3 (Figure 1).

[0065] On the other hand, since the front right central gear 1a is meshed with the front left central gear 2a, when the front right central gear 1a rotates in the direction of the arrow 200a, the front left central gear 2a rotates in the direction of the arrow 201a (Figure 1) in synchronization therewith.

[0066] The front left central gear 2a is fixed to a rotating shaft 4 that is rotatably supported on a base (not shown). Therefore, when the front left central gear 2a rotates in the direction of arrow 201a, the rotating shaft 4 rotates, and the rear left central gear 2b, which is fixed to the rotating shaft 4, also rotates in the direction of arrow 201a in synchronization with the rotation of the front left central gear 2a.

[0067] The front-left central gear 2a is fixed to the lower end of the left outer arm 6a, and the rear-left central gear 2b is fixed to the lower end of the left outer arm 6b. Therefore, in accordance with the synchronous rotation of the front-left central gear 2a and the rear-left central gear 2b in the direction of arrow 201a, the left outer arms 6a and 6b rotate synchronously in the direction indicated by arrow 201b around the position of the rotation shaft 4 (Figure 1).

[0068] As described above, the inner support / rotation mechanism 102 (FIG. 3) is mounted on the outer support mechanism 101 (FIG. 2), and the meshing between the right internal gear 16a and the front right gear 7a, between the right internal gear 16b and the rear right gear 7b, between the left internal gear 17a and the front left gear 8a, and between the left internal gear 17b and the rear right gear 8b is as follows:

[0069] The right inner gear 16a provided on the radially outer side of the right inner arm 11a is engaged with the front right gear 7a rotatably supported by the right outer arm 5a under the force of gravity from top to bottom in FIG. 1.

[0070] The right inner gear 16b provided on the radially outer side of the right inner arm 11b is engaged with the rear right gear 7b rotatably supported by the right outer arm 5b under the force of gravity from top to bottom in FIG. 1.

[0071] The left inner gear 17a provided on the radially outer side of the left inner arm 14a is engaged with the front left gear 8a rotatably supported by the left outer arm 5a under the force of gravity from top to bottom in FIG. 1.

[0072] The left inner gear 17b provided on the radially outer side of the left inner arm 14b meshes with the rear right gear 8b rotatably supported by the left outer arm 6b under the force of gravity in the downward direction in FIG. 1.

[0073] Therefore, as described above, when the right outer arms 5a and 5b rotate synchronously around the position of the rotation shaft 3 in the direction indicated by the arrow 200b (FIG. 1), the front right gear 7a and the rear right gear 7b rotate synchronously around their respective rotation support shafts in the direction indicated by the arrow 202a (FIG. 1), and also rotate synchronously together with the right outer arms 5a and 5b around the position of the rotation shaft 3 in the direction indicated by the arrow 200b (FIG. 1).

[0074] Furthermore, when the left outer arms 6a and 6b rotate synchronously around the position of the rotation shaft 4 in the direction indicated by the arrow 201b (Figure 1), the front left gear 8a and the rear left gear 8b rotate synchronously around their respective rotation support shafts in the direction indicated by the arrow 203a (Figure 1), and also rotate synchronously together with the left outer arms 6a and 6b around the position of the rotation shaft 4 in the direction indicated by the arrow 201b.

[0075] As a result, the right inner gears 16a and 16b formed circumferentially on the radially outer sides of the right inner arm 11a and the right inner arm 11b, respectively, rotate synchronously in the direction indicated by arrow 204a (FIG. 1) in response to the synchronous rotation of the meshed front right gear 7a and rear right gear 7b in the direction indicated by arrow 202a, and in response to this, the right inner arms 11a and 11b rotate synchronously around the central axis 10 in the direction indicated by arrow 204a.

[0076] Similarly, the left inner gears 17a and 17b formed in the circumferential direction on the radially outer sides of the left inner arm 14a and the left inner arm 14b respectively rotate synchronously in the direction indicated by arrow 205a (FIG. 1) in response to the synchronous rotation of the meshed front left gear 8a and rear left gear 8b in the direction indicated by arrow 203a, and in response to this, the left inner arms 14a and 14b rotate synchronously around the central axis 10 in the direction indicated by arrow 205a (FIG. 1).

[0077] In the heavy load supporting and rotating device 100 (Fig. 1) of this embodiment, the right inner gears 16a, 16b provided on the radially outer side of the right inner arms 11a, 11b mesh from above with the right gears 7a, 7b rotatably supported by the right outer arms 5a, 5b, and the left inner gears 17a, 17b provided on the radially outer side of the left inner arms 14a, 14b mesh from above with the left gears 8a, 8b rotatably supported by the left outer arms 6a, 6b. This allows the right inner arm 11 and the left inner arm 14 to rotate in synchronization with the rotation of the right outer arm 5 and the left outer arm 6, as described above.

[0078] In this way, the heavy load support and rotation device 100 according to one embodiment of the present invention shown in Figure 1 is in the basic form, and changes to the state shown in Figure 6, in which the right outer arms 5a, 5b and left outer arms 6a, 6b that constitute the outer support mechanism 101 are released, and the right inner arms 11a, 11b and left inner arms 14a, 14b that constitute the inner support and rotation mechanism 102 are released.

[0079] The state shown in Figure 6 is a state in which a long heavy object extending in the front-to-back direction of the drawing in Figure 6, which corresponds to the longitudinal direction of the long heavy object to be loaded, can be loaded onto the heavy object support and rotation device 100 of this embodiment (Figures 1 and 6).

[0080] <Process for loading long, heavy objects onto the inner support and rotation mechanism> Once the state shown in Figure 6 is reached, the inner support and rotation mechanism 102 (Figure 3) is housed inside the outer support mechanism 101 (Figure 2) from above, and a long heavy load extending in the longitudinal direction is placed on the inner support and rotation mechanism 102 in the heavy load support and rotation device 100 (Figure 1), which is configured so that the inner support and rotation mechanism 102 is mounted on the upper side of the outer support mechanism 101.

[0081] In the illustrated embodiment, the H-beam 300 extending in the front-to-back direction of the drawings in Figures 6 and 7 is a long, heavy object extending in the longitudinal direction, and the H-beam 300 is loaded using a specified hoisting machine (not shown) (Figure 7).

[0082] The inner support and rotation mechanism 102 (FIG. 3) has a left-right symmetrical structure with respect to a center line YY extending in the front-to-rear direction (the up-to-down direction in FIG. 2), and a front-to-back symmetrical structure (up-to-down symmetrical structure) with respect to a center line XX extending in the left-to-right direction (the left-to-right direction in FIG. 2).

[0083] Therefore, for example, by setting the shape, structure, and size of the lower end 12a of the right inner arm 11a and the lower end 15a of the left inner arm 14a so that the plane formed by the tip end portion of the lower end 12a of the right inner arm 11a and the tip end portion of the lower end 15a of the left inner arm 14a is a size suitable for supporting the lower flange 300b of the H-shaped steel 300 from below, the right outer arms 5a, 5b and left outer arms 6a, 6b that constitute the outer support mechanism 101 are opened, and the right inner arms 11a, 11b and left inner arms 14a, 14b that constitute the inner support and rotation mechanism 102 are opened, the lower flange 300b of the H-shaped steel 300 can be mounted on the inner support and rotation mechanism 102 of the heavy load support and rotation device 100 (FIG. 1) that is in the state shown in FIG. 6, as shown in FIG. <The process of supporting the H-beam mounted on the inner support / rotation mechanism with the inner support / rotation mechanism> Once the H-beam 300 has been placed on the inner support and rotation mechanism 102 as shown in FIG. 7, the right inner arms 11a, 11b and the left inner arms 14a, 14b that constitute the inner support and rotation mechanism 102 are then closed, and the H-beam 300 is supported by the right inner arms 11a, 11b and the left inner arms 14a, 14b, i.e., is clamped (FIG. 9).

[0084] In the state shown in Figure 7, the motor 110 mounted on a base (not shown) mounted below the heavy load supporting and rotating device 100 is driven to rotate the front right central gear 1a in the direction of the arrow 210a.

[0085] As a result, the rear right central gear 1b also rotates in the direction of the arrow 210a in synchronization with the rotation of the front right central gear 1a.

[0086] Then, in accordance with the synchronized rotation of the front right central gear 1a and the rear right central gear 1b in the direction of the arrow 210a, the right outer arm 5a and the right outer arm 5b rotate synchronously around the position of the rotation axis 3 in the direction indicated by the arrow 210b.

[0087] Since the front right central gear 1a is meshed with the front left central gear 2a, when the front right central gear 1a rotates in the direction of the arrow 210a, the front left central gear 2a rotates in the direction of the arrow 211a in synchronization therewith.

[0088] As a result, the rear left central gear 2b also rotates in the direction of the arrow 211a in synchronization with the rotation of the front left central gear 2a.

[0089] Then, in accordance with the synchronized rotation of the front left central gear 2a and the rear left central gear 2b in the direction of arrow 211a, the left outer arm 6a and the left outer arm 6b rotate synchronously around the position of the rotation shaft 4 in the direction indicated by arrow 211b.

[0090] As explained in the preparation process for loading the long, heavy object (H-shaped steel beam) described above, due to the relationships formed among the right internal gear 16a, right internal gear 16b, front right gear 7a, rear right gear 7b, left internal gear 17a, left internal gear 17b, front left gear 8a, and rear right gear 8b, when the right outer arm 5a and right outer arm 5b rotate synchronously around the position of the rotation shaft 3 in the direction shown by arrow 210b (FIG. 7), the front right gear 7a and rear right gear 7b rotate synchronously around their respective rotation support shafts in the direction shown by arrow 212a (FIG. 7), and also rotate synchronously together with the right outer arm 5a and right outer arm 5b around the position of the rotation shaft 3 in the direction shown by arrow 210b (FIG. 7).

[0091] Furthermore, when the left outer arms 6a and 6b rotate synchronously around the position of the rotation shaft 4 in the direction indicated by the arrow 211b (FIG. 7), the front left gear 8a and the rear left gear 8b rotate synchronously around their respective rotation support shafts in the direction indicated by the arrow 213a (FIG. 7), and also rotate synchronously together with the left outer arms 6a and 6b around the position of the rotation shaft 4 in the direction indicated by the arrow 211b.

[0092] As a result, the right inner gears 16a and 16b formed circumferentially on the radially outer sides of the right inner arm 11a and the right inner arm 11b, respectively, rotate synchronously in the direction indicated by arrow 214a (FIG. 7) in response to the synchronous rotation of the meshed front right gear 7a and rear right gear 7b in the direction indicated by arrow 212a, and in response to this, the right inner arms 11a and 11b rotate synchronously around the central axis 10 in the direction indicated by arrow 214a.

[0093] Similarly, the left inner gears 17a and 17b formed in the circumferential direction on the radially outer sides of the left inner arm 14a and the left inner arm 14b respectively rotate synchronously in the direction indicated by arrow 215a (FIG. 1) in response to the synchronous rotation of the meshed front left gear 8a and rear left gear 8b in the direction indicated by arrow 213a, and in response to this, the left inner arms 14a and 14b rotate synchronously around the central axis 10 in the direction indicated by arrow 215a (FIG. 7).

[0094] In this way, the state in which the H-beam 300 is mounted on the inner support and rotation mechanism 102 shown in FIG. 7 changes to the state in which the right inner arms 11a, 11b and the left inner arms 14a, 14b that constitute the inner support and rotation mechanism 102 shown in FIG. 9 are closed, and the H-beam 300 is supported by the right inner arms 11a, 11b and the left inner arms 14a, 14b, that is, the H-beam 300 is sandwiched between the right inner arms 11a, 11b and the left inner arms 14a, 14b (FIG. 9).

[0095] As described above, the inner support / rotation mechanism 102 (FIG. 3) has a left-right symmetrical structure with respect to the center line YY extending in the up-down direction perpendicular to the front-rear direction, and has a front-rear symmetrical structure (up-down symmetrical structure) with respect to the center line XX extending in the left-right direction.

[0096] Therefore, until the H-beam 300 mounted on the inner support / rotation mechanism 102 as shown in FIG. 7 is supported by the right inner arms 11a, 11b and the left inner arms 14a, 14b as shown in FIG. 9, that is, until it is sandwiched between the right inner arms 11a, 11b and the left inner arms 14a, 14b, the H-beam 300 is always supported at two points located symmetrically on the left and right sides: the upper vertices of the lower end 15a of the left inner arm 14a and the lower end 15b of the left inner arm 14b, and the upper vertices of the lower end 12a of the right inner arm 11a and the lower end 12b of the right inner arm 11b.

[0097] Therefore, until the H-beam 300 mounted on the inner support / rotation mechanism 102 as shown in FIG. 7 is supported by the right inner arms 11a, 11b and the left inner arms 14a, 14b as shown in FIG. 9, that is, until it is sandwiched between the right inner arms 11a, 11b and the left inner arms 14a, 14b, the H-beam 300 is always in a stable state with its center of gravity kept in the center. <The process of rotating the H-beam supported by the inner support and rotation mechanism to the desired position> In the state shown in FIG. 9, the motor 111 that applies a rotational force to the front left gear 8a rotatably supported on the left outer arm 6a is driven to rotate the front left gear 8a in the direction of the arrow 220a.

[0098] Since the front left gear 8a meshes with the left inner gear 17a of the left inner arm 14a, the left inner gear 17a and the left inner arm 14a that has it radially outside rotate in the direction shown by arrow 221a.

[0099] As described above, the heavy load support and rotation device 100 (Figs. 1 and 4) is configured such that the inner support and rotation mechanism 102 (Fig. 3) is accommodated inside the outer support mechanism 101 (Fig. 2) from above, and the inner support and rotation mechanism 102 (Fig. 3) is mounted above the components of the outer support mechanism 101 (Fig. 2).

[0100] In the structure of this embodiment in which the inner support / rotation mechanism 102 is mounted on the upper side of the components of the outer support mechanism 101, as described above, the right inner gear 16a provided on the radially outer side of the right inner arm 11a of the inner support / rotation mechanism 102 meshes from above with the front right gear 7a rotatably supported by the right outer arm 5a of the outer support mechanism 101, and the right inner gear 16b provided on the radially outer side of the right inner arm 11b of the inner support / rotation mechanism 102 meshes with the front right gear 7a rotatably supported by the right outer arm 5b of the outer support mechanism 101. The left inner gear 17a provided on the radially outer side of the left inner arm 14a of the inner support / rotation mechanism 102 meshes from above with the front left gear 8a rotatably supported by the left outer arm 5a of the outer support mechanism 101, and the left inner gear 17b provided on the radially outer side of the left inner arm 14b of the inner support / rotation mechanism 102 meshes from above with the rear right gear 8b rotatably supported by the left outer arm 6b of the outer support mechanism 101.

[0101] The inner support and rotation mechanism 102 is configured such that the lower ends of the right inner arms 11a and 11b and the lower ends of the left inner arms 14a and 14b are rotatably supported by the central shaft 10.

[0102] Therefore, when the left inner gear 17a and the left inner arm 14a that has it radially outside rotate in the direction shown by the arrow 221a, the entire inner support / rotation mechanism 102 that supports the H-beam 300 with the right inner arms 11a, 11b and the left inner arms 14a, 14b as shown in Figure 9 rotates in the direction shown by the arrow 221b (Figure 9).

[0103] The rotation of the entire inner support and rotation mechanism 102 in the direction indicated by arrow 221b occurs on the front right gear 7a rotatably supported by the right outer arm 5a of the outer support mechanism 101, the rear right gear 7b rotatably supported by the right outer arm 5b of the outer support mechanism 101, the front left gear 8a rotatably supported by the left outer arm 6a of the outer support mechanism 101, and the rear right gear 8b rotatably supported by the left outer arm 6b of the outer support mechanism 101 (Figure 9).

[0104] As a result, the right inner arms 11a, 11b and the left inner arms 14a, 14b constituting the inner support / rotation mechanism 102 shown in FIG. 9 are closed, and the H-beam 300 can be rotated 30 degrees clockwise from the state in which it is supported by the right inner arms 11a, 11b and the left inner arms 14a, 14b as shown in FIG. 9, as shown in FIG. 12, and this state can be maintained.

[0105] For example, while maintaining the rotating state shown in FIG. 12, welding can be performed from the upper side of FIG. 12 on the intersection between the bottom flange 300c and the web 300b of the H-beam steel 300.

[0106] In the state shown in FIG. 12, the motor 111 that applies a rotational force to the front left gear 8a rotatably supported on the left outer arm 6a is driven to rotate the front left gear 8a in the direction of arrow 220a. By doing as described above, the inner support / rotation mechanism 102 can be rotated a further 30 degrees clockwise to reach the state shown in FIG. 13.

[0107] By maintaining the rotational state shown in FIG. 13, it becomes possible to perform welding processing from the upper side of FIG. 13 on the intersection between the upper flange 300a and the web 300b of the H-beam 300, for example.

[0108] Furthermore, by driving the motor 111 that applies a rotational force to the front left gear 8a rotatably supported on the left outer arm 6a, the front left gear 8a is rotated in the direction opposite to the arrow 220a (Figure 9), which reverses the above-mentioned operation and makes it possible to rotate the entire inner support / rotation mechanism 102 in the direction opposite to the arrow 221a.

[0109] The motor 111 that applies a rotational force to the front left gear 8a that is rotatably supported on the left outer arm 6a can be structured, for example, to be fixed or attached to the left outer arm 6a.

[0110] When welding a long, heavy object, such as an H-beam, which is long in the longitudinal direction and heavy, at locations such as those exemplified above, it becomes necessary to change the position of the long, heavy object in various ways.

[0111] According to the heavy load support and rotation device 100 of this embodiment, as described above, a long heavy load (e.g., H-beam 300) extending in the longitudinal direction can be supported in the horizontal direction, i.e., the longitudinal direction, as shown in Figure 9, and then rotated to a desired angle around an axis extending in the longitudinal direction, as shown in Figures 12 and 13, and various tasks and processes such as welding can be performed on the heavy load (e.g., H-beam 300) in the rotated state.

[0112] Long, heavy objects that extend in the longitudinal direction (such as H-beams) come in a variety of sizes depending on their standards.

[0113] The heavy load support and rotation device 100 having the basic configuration of Figure 1 can support H-beam 300 of the size shown in Figure 9, but if the size of the long object to be supported is smaller than the size shown in Figure 9, the following can be done.

[0114] That is, as shown in FIG. 14(b), auxiliary support pieces 31a, 31b, 31c, 31d are attached to the inner corners of the right inner arms 11a, 11b and the left inner arms 14a, 14b that are formed when the right inner arms 11a, 11b and the left inner arms 14a, 14b that constitute the inner support / rotation mechanism 102 are in a closed state and, for example, as shown in FIG. 9, the H-beam steel 300 is supported by the right inner arms 11a, 11b and the left inner arms 14a, 14b.

[0115] In the embodiment shown in Figure 14(a), screw holes 30a, 30b, and 30c for attaching auxiliary pieces are formed at the four inner corners of the right inner arms 11a, 11b and the left inner arms 14a, 14b described above.

[0116] If the size of the long object to be supported is smaller than the size shown in Figure 9, support auxiliary pieces 31a, 31b, 31c, and 31d that can form the appropriate support size can be attached to the four inner corners using mounting screws 32a, 32b, and 32c, as shown in Figure 14(b).

[0117] In addition, by using elastic materials as the auxiliary support pieces 31a, 31b, 31c, and 31d, it is possible to provide a cushion between the right inner arms 11a and 11b and the left inner arms 14a and 14b and a heavy object that is sandwiched between them.

[0118] Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments and can be modified in various ways within the technical scope grasped from the description of the claims.

Claims

1. A heavy load support and rotation device is formed by accommodating an inner support and rotation mechanism inside an outer support mechanism from above the outer support mechanism, and mounting the inner support and rotation mechanism on an upper side of a component of the outer support mechanism, and supporting and rotating a long heavy load extending in a longitudinal direction, the outer support mechanism includes a right outer arm and a left outer arm each having a base end at a lower end on the center side in the left-right direction, each having an arc shape extending upward while curving convexly in the left and right directions, and each of whose tips rotates synchronously around the base end in a direction from an open state in which the tip ends are separated from each other to a direction in which the tip ends approach each other and in the reverse direction, the inner support mechanism includes a right inner arm and a left inner arm, each having a base end at a lower end side on the center side in the left-right direction, each arc-shaped extending upward while being convex in both the left and right directions, and each tip of which rotates about the base end in synchronization with the rotation of the right outer arm and the left outer arm in a direction from an open state in which the tip ends are separated from each other to a direction in which the tip ends approach each other and in the opposite direction; The inner support mechanism rotates the heavy load by a desired angle around an axis extending in the longitudinal direction while supporting the heavy load between the right inner arm and the left inner arm in the horizontal direction, which is the longitudinal direction, inside the outer support mechanism. Heavy load support and rotation device.

2. a right inner gear provided on the radially outer side of the right inner arm meshes from above with a right gear rotatably supported by the right outer arm; The left inner gear provided on the radially outer side of the left inner arm is engaged from above with the left gear rotatably supported by the left outer arm, The right inner arm and the left inner arm are rotated in synchronization with the rotation of the right outer arm and the left outer arm.

2. The heavy load supporting and rotating device according to claim 1.

3. 3. The heavy load supporting and rotating device according to claim 1, wherein the outer support mechanism, the inner support and rotating mechanism, and the heavy load supporting and rotating device are all symmetrical about the center in the left-right direction.

4. A heavy object support / rotation device as described in claim 3, wherein the outer support mechanism, the inner support / rotation mechanism, and the heavy object support / rotation device are all configured with a structure that is symmetrical in the front-to-back direction, perpendicular to the left-to-right direction, and centered in the front-to-back direction, which is the direction in which the supported heavy object extends.

Images