Load mounting mechanism for load lifting device

Abstract

To provide a load mounting mechanism for a load lifting device, which can easily move even a weighty load on a lifting table of the load lifting device.SOLUTION: A load mounting mechanism 20 comprises: a fixed mechanism part 22 attached to a lifting table 12; a movable mechanism part 24 including a load mounting part 2402 on the upper surface; a horizontal support mechanism 26 that supports the movable mechanism part 24 on the fixed mechanism part 22 to be movable within the range of 360 degrees around the load mounting part 2402; and a moving range restriction mechanism 28 that restricts the horizontal moving range of the movable mechanism part 24 on the fixed mechanism part 22.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a luggage placing mechanism provided on a lifting table of a luggage lifting device. [Background technology]

[0002] Conventionally, a cargo lifting device (lifter) has been known which includes a base supported by multiple swivel wheels, a lifting mechanism provided on the base, and a lifting table which is raised and lowered by the lifting mechanism, and also a high-altitude work vehicle has been known which includes a mobile base, a lifting mechanism provided on the base, and a work scaffold which is raised and lowered by a lift. For example, when installing an air conditioner on the ceiling of a building, one such luggage lifting device and two aerial work platforms are used. More specifically, when an air conditioner is installed on the ceiling of a building, a luggage lifting device is placed directly below the location on the ceiling where the air conditioner is to be installed, and high-altitude workers are placed on either side of the device. Then, the air conditioner is placed on the lifting table of the luggage lifting device, the air conditioner is raised to near the ceiling, and the work scaffolding is raised to position the worker near the ceiling. The worker moves the air conditioner on the lift table to fine-tune its position and aligns the bolt insertion holes in the flanges on the outer periphery of the air conditioner with the hanging bolts hanging from the ceiling. Once the alignment of the plurality of bolt insertion holes with the plurality of hanging bolts is completed, the lifting table is further raised, the hanging bolts are inserted into the plurality of bolt insertion holes, respectively, and when the tips of the plurality of hanging bolts protrude from the plurality of bolt insertion holes, the lifting of the lifting table is stopped. Then, the worker tightens the lock nuts on each hanging bolt, completing the installation of the air conditioner on the ceiling. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-178113 Summary of the Invention [Problem to be solved by the invention]

[0004] On the other hand, the fine adjustment work to align the multiple bolt insertion holes with the multiple hanging bolts required a worker on a work scaffold to move the air conditioner placed on a lifting table in millimeters on the lifting table.As the air conditioner is heavy, weighing around 20 kg, this alignment work was a tedious and time-consuming task that placed a heavy burden on the worker. Furthermore, with conventional construction methods, cargo such as air conditioners was lifted in an unstable position, which created a risk of the cargo falling, requiring careful work to prevent accidents and resulting in reduced work efficiency. The present invention has been made in consideration of the above circumstances, and aims to provide a luggage loading mechanism for a luggage lifting device that can significantly reduce the burden on workers working at heights and is advantageous in improving the work efficiency of working at heights. [Means for solving the problem]

[0005] In order to achieve the above-mentioned object, one embodiment of the present invention is a luggage loading mechanism attached to the lifting table of a luggage lifting device, characterized in that the luggage loading mechanism comprises a fixed mechanism part attached to the lifting table, a movable mechanism part having a luggage loading part on its upper surface, a horizontal support mechanism that supports the movable mechanism part on the fixed mechanism part so that it can move horizontally within a 360-degree range around the luggage loading part, and a movement range restriction mechanism that restricts the horizontal movement range of the movable mechanism part on the fixed mechanism part. In addition, one embodiment of the present invention is characterized in that the lifting table has a width in a direction perpendicular to the direction in which the lifting table is raised and lowered, the movable mechanism section has an upper frame body at its upper part in which a plurality of elongated members are assembled into a rectangular frame shape on the same plane, and a pair of opposing sides extend in a direction parallel to the width direction of the lifting table, and the luggage loading section is formed by the upper frame body. In addition, one embodiment of the present invention is characterized in that a rubber plate is attached to the upper surface of the upper frame. Furthermore, one embodiment of the present invention is characterized in that the pair of opposing elongated members that extend in a direction parallel to the width direction of the lift table and constitute the upper frame are configured to be adjustable in length and contraction. In addition, one embodiment of the present invention is characterized in that the fixed mechanism unit comprises a fixed frame body in which a plurality of elongated members are assembled into a rectangular frame shape, with a pair of opposing sides extending in a direction parallel to the width direction of the lift-up table, and the movable mechanism unit comprises a movable frame body provided below the upper frame body, in which a plurality of elongated members are assembled into a rectangular frame shape smaller than the fixed frame body, with a pair of opposing sides extending in a direction parallel to the width direction of the lift-up table, and which is positioned inside the fixed frame body and moves integrally with the upper frame body, and the movement range is determined by the movable frame body abutting against the inside of the fixed frame body, and the movement range restriction mechanism is composed of the fixed frame body and the movable frame body. Moreover, one embodiment of the present invention is characterized by further comprising a locking mechanism that locks the fixed mechanism portion and the movable mechanism portion so that they cannot move in the horizontal direction. Furthermore, one embodiment of the present invention is characterized in that the locking mechanism locks the fixed mechanism unit and the movable mechanism unit so that they cannot move horizontally when the movable frame body is positioned approximately in the center of the fixed frame body. Moreover, one embodiment of the present invention is characterized by further comprising a lift-up prevention mechanism that prevents the movable mechanism part from lifting up above the fixed mechanism part. In addition, one embodiment of the present invention is characterized in that the lifting table is formed in a rectangular frame shape, the fixed frame body is arranged inside the rectangular frame that forms the outline of the lifting table when viewed in a plane, a plurality of elongated anti-lifting members are provided on the underside of the movable frame body, both ends of which can abut the underside of the fixed frame body, and the anti-lifting mechanism is composed of the plurality of anti-lifting members. In addition, one embodiment of the present invention is characterized in that the horizontal support mechanism includes a plurality of free ball bearings provided in the fixed mechanism part, and a plurality of bearing plates provided in the movable mechanism part, each having a flat bearing surface facing downward and movably supported by the free ball bearings. [Effects of the Invention]

[0006] According to one embodiment of the present invention, the movable mechanism section on which the heavy object is placed is supported by a horizontal support mechanism so that it can move horizontally within a 360-degree range around the luggage placement section. Therefore, fine adjustments for aligning the heavy object at high altitudes can be easily made by moving the luggage placement section with one hand, without having to push the heavy object on a lifting table as in the conventional case. This significantly reduces the burden on workers working at height, which is advantageous for improving work efficiency at height, shortening construction periods, and reducing costs for buildings, etc. In addition, a movement range restriction mechanism is provided to restrict the horizontal movement range of the movable mechanism part, which prevents the heavy object from moving more than necessary, which is advantageous in easily making fine adjustments to align the heavy object. In addition, the movable mechanism unit has an upper frame body that forms a luggage loading section at the top of the movable mechanism unit, and since the upper frame body is assembled into a rectangular frame shape using multiple elongated members, the upper frame body has multiple openings that penetrate in the vertical direction. Therefore, depending on the shape and type of heavy object placed on the luggage storage section, various installation operations can be performed from below the luggage storage section, which is advantageous in increasing the usability and practical value of the luggage storage mechanism at high altitudes. Furthermore, if a rubber plate is attached to the upper surface of the upper frame, the air conditioner can be moved integrally with the luggage carrying section, which is advantageous in terms of efficient fine adjustment of the air conditioner. Furthermore, if the pair of opposing elongated members for the long sides that make up the upper frame body are configured to be adjustable in length and contraction, it will be possible to accommodate the attachment of heavy objects such as air conditioners of various different sizes, which will be advantageous in increasing the usability and practical value of the luggage loading mechanism. Furthermore, the fixed frame body and the movable frame body that constitute the movement range restriction mechanism may each be formed as a circular frame body, but as in this embodiment, they are each formed as a rectangular frame body, so they can be easily manufactured by cutting and assembling commercially available rod material such as rolled steel, which is advantageous in reducing the cost of the luggage loading mechanism. Furthermore, although the movable frame may be provided outside the fixed frame, providing the movable frame inside the fixed frame reduces the space occupied by the movable frame compared to providing the movable frame outside the fixed frame, which is advantageous in terms of making the movement range restriction mechanism more compact. In addition, the luggage placement mechanism is equipped with a locking mechanism that locks the fixed mechanism part and the movable mechanism part so that they cannot move horizontally. Therefore, when a heavy object such as an air conditioner is placed on the luggage placement part and moved, the heavy object does not move on the lifting table, so the luggage lifting device can be moved and the heavy object can be lifted and lowered in a more stable condition, which is advantageous in increasing the practical value of the luggage placement mechanism. Furthermore, if the locking mechanism is configured to lock the fixed mechanism section and the movable mechanism section so that they cannot move horizontally when the movable frame body is positioned approximately in the center of the fixed frame body, the rough position of the heavy object can be adjusted in the locked state, and when the locking mechanism is released for fine adjustment, the movable frame body becomes movable in either direction, which is advantageous in making fine adjustments to the heavy object easier. Furthermore, if a lift-up prevention mechanism that prevents the movable mechanism from lifting upward on the fixed mechanism is provided, this is advantageous in that the load lifting device carrying a heavy load can be moved in a more stable manner. Furthermore, when the fixed frame is positioned inside the rectangular frame that defines the outline of the lift-up table in a plan view, there is space below the fixed frame and below the movable frame for arranging components. Therefore, by providing the underside of the movable frame with a plurality of elongated anti-lift members, both ends of which can abut against the underside of the fixed frame, a lift-up prevention mechanism can be easily provided, which shortens the vertical dimension of the luggage placement mechanism when assembled to the lift-up table and is also advantageous for reducing the cost of the luggage placement mechanism. Furthermore, if the horizontal support mechanism is constructed from a plurality of free ball bearings provided in the fixed mechanism section and a plurality of bearing plates with flat bearing surfaces provided in the movable mechanism section, a horizontal support mechanism that supports the movable mechanism section so that it can move in either direction can be easily obtained.Furthermore, since the structure simply involves placing the bearing surfaces on a plurality of free ball bearings, assembly of the horizontal support mechanism is also easy, which is advantageous in reducing the cost of the luggage loading mechanism. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. 2 is a perspective view of the luggage placement mechanism attached to the lift table. [Figure 6] FIG. 2 is a plan view of the luggage placement mechanism attached to the lift table. [Figure 7] FIG. 2 is a front view of the luggage placement mechanism attached to the lift table. [Figure 8] FIG. 7 is a view taken along the arrow A in FIG. 6. [Figure 9] FIG. [Figure 10] FIG. [Figure 11] FIG. [Figure 12] FIG. [Figure 13] FIG. [Figure 14] FIG. [Figure 15] FIG. [Figure 16] FIG. [Figure 17] FIG. 10 is a perspective view of the luggage placement section in its widest state. [Figure 18] FIG. 10 is a plan view of the luggage placement section in its widest state. [Figure 19] FIG. 10 is a front view of the luggage placement section in its widest state. [Figure 20] The figure shows the state in which the movable mechanism is in the retreated position and at the leftmost position. [Figure 21] The figure shows the state in which the movable mechanism is in the retracted position and at the rightmost position. [Figure 22] The state in which the movable mechanism is in the forward position and at the leftmost position is shown. [Figure 23] The diagram shows the state in which the movable mechanism is in the forward position and at the rightmost position. [Figure 24] This is an explanatory diagram of the work of placing an air conditioner on the lifting table of a luggage lifting device, lifting it, and then having workers standing on the work platforms of two aerial work platforms install the air conditioner. [Figure 25] An explanatory diagram of a luggage lifting device, in which (A) is a perspective view of the lifting table when it is in its lowest position, (B) is a perspective view of the lifting table when it is raised, and (C) is a perspective view of the lifting table when it is in its highest position. [Figure 26] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The luggage placement mechanism 20 according to the embodiment of the present invention shown in FIG. 5 is attached to the lifting table 12 of the luggage lifting device 10 shown in FIG. 25 when in use. (Luggage lifting device) First, the luggage lifting device 10 will be briefly described with reference to FIG. The luggage lifting device 10 is used to transport and lift luggage such as materials and equipment at construction sites, warehouses, and the like. The luggage lifting device 10 raises and lowers a lifting table 12 on which luggage is placed, and is composed of a frame 14 supported by four swivel wheels, a mast-type lifting mechanism 16 that stands up from the frame 14, the lifting table 12 that is raised and lowered by the lifting mechanism 16, an operating handle for movement, a winch 18, a battery, a control device, and a remote controller. The lifting mechanism 16 includes a first plate member 16A, a second plate member 16B, and a third plate member 16C that are arranged from the front to the back of the luggage lifting device 10 and are connected to each other so as to be slidable in the up and down direction. The third plate member 16C is supported by the frame 14, and each of the first plate member 16A, the second plate member 16B, and the third plate member 16C is provided with a pulley 1802, and a wire 1804 connected to the lifting table 12 is wound around the outer periphery of the pulley 1802. One end of the wire 1804 is connected to the winch 18, and is wound around pulleys 1802 provided on each of the third plate member 16C, the second plate member 16B, and the first plate member 16A, and the other end is connected to the lifting table 12, and the lifting mechanism 16 extends and retracts as the winch 18 rotates forward and backward. The frame 14 is provided with a clamp 1402 for connecting the luggage lifting device 10 to the aerial work platform 50, and by connecting the clamp 1402 to the connecting rod 5002 of the aerial work platform 50 shown in Figure 26, the luggage lifting device 10 moves in accordance with the aerial work platform 50.

[0009] (Lift table) As shown in Figures 1 to 4, the lifting table 12 has a width in a direction perpendicular to the direction in which the lifting table 12 is raised and lowered, in other words, has a width W1 along the width direction of the luggage lifting device 10, and is formed into a rectangular frame shape when viewed in a plane. The lifting table 12 is made of steel and is configured in a rectangular frame shape with an elongated base member 1202 located on the lifting mechanism 16 side, a tip member 1204 facing the base member 1202, and a pair of side members 1206 connecting both ends of the base member 1202 and both ends of the tip member 1204. A pair of first angle irons 1208 are attached to the base member 1202 for attaching the lifting table 12 to the lifting mechanism 16, and as shown in Figure 25, by fastening the pair of first angle irons 1208 to the top of the first plate member 16A using bolts, the lifting table 12 rises and falls integrally with the first plate member 16A. A second angle iron 1210 for attaching the luggage placement mechanism 20 is attached to the pair of side members 1206. In this embodiment, a commercially available mast-type lifting mechanism is used as the lifting mechanism 16, but the lifting mechanism 16 is not limited to a mast-type lifting mechanism, and various types of lifting mechanism known in the art, such as a Caisar link-type lifting mechanism, can be used as the lifting mechanism 16.

[0010] (Luggage loading mechanism) As shown in Figures 5 to 8, the luggage placement mechanism 20 includes a fixed mechanism section 22, a movable mechanism section 24 having a luggage placement section 2402 on its upper surface, a horizontal support mechanism 26, a movement range restriction mechanism 28, a locking mechanism 30, and a lift-up prevention mechanism 32. The fixed mechanism part 22 and the movable mechanism part 24 are each constructed by assembling a plurality of elongated members made of metal or synthetic resin, and in this embodiment, commercially available elongated members made of aluminum alloy are used.

[0011] (Fixing mechanism part) As shown in Figures 9 to 12, the fixing mechanism part 22 has a width W2 along the width W1 direction of the lifting table 12, and is composed of a fixing frame body 22A and a pair of outer fixing frame body parts 22B located on both sides of the fixing frame body 22A in the width direction. In more detail, the fixing mechanism unit 22 is removably attached to the lifting table 12 with the fixing frame body 22A placed on the lifting table 12, and the fixing mechanism unit 22 is composed of six elongated members assembled on the same plane. As shown in FIG. 10, four of the six elongated members form a rectangular frame body that is elongated in the width W1 direction of the lift table 12 and has long sides that are larger than the width W1 of the lift table 12. The elongated member constituting one of the pair of long sides of the rectangular frame is a horizontally fixed first elongated member 2202 arranged at a position close to one side (base member 1202) of the lifting table 12 connected to the lifting mechanism 16 of the luggage lifting device 10, and the other of the pair of long sides of the rectangular frame is a horizontally fixed second elongated member 2204 arranged at a position close to the tip of the lifting table 12, away from the one side of the lifting table 12. In addition, the elongated members that form a pair of short sides of the rectangular frame are a pair of outer vertical fixed elongated members 2206 that connect both longitudinal ends of the horizontally fixed first elongated member 2202 and both longitudinal ends of the horizontally fixed second elongated member 2204. The remaining two of the six elongated members are a pair of inner vertically fixed elongated members 2208 arranged inside and parallel to the pair of outer vertically fixed elongated members 2206, and both ends of which are connected to the first horizontally fixed elongated member 2202 and the second horizontally fixed elongated member 2204.

[0012] (Fixed frame, outer fixed frame) The fixing mechanism 22 includes a fixing frame 22A and a pair of outer fixing frame portions 22B. The portion of the horizontally fixed first elongate member 2202 located between the pair of inner longitudinally fixed elongate members 2208 constitutes the fixed first elongate member 2210, and the portion of the horizontally fixed second elongate member 2204 located between the pair of inner longitudinally fixed elongate members 2208 constitutes the fixed second elongate member 2212. The fixed frame 22A is composed of a pair of inner longitudinal fixed elongated members 2208, a first fixed elongated member 2210, and a second fixed elongated member 2212. In addition, the pair of outer fixed frame body portions 22B are composed of a pair of horizontally fixed first elongated members 2202 portions located outside the pair of inner vertically fixed elongated members 2208, a pair of horizontally fixed second elongated members 2204 portions, and an outer vertically fixed elongated member 2206. A plurality of thumb turn clamps 2214 for attaching the fixing mechanism unit 22 to the lifting table 12 are provided at the location of a pair of inner vertical fixed elongated members 2208 located on the outside of the fixed frame body 22A, and as shown in Figures 5 and 6, the fixing mechanism unit 22 is attached to the lifting table 12 by being attached to the second angle iron 1210 of the lifting table 12 in a one-touch detachable manner using these thumb turn clamps 2214. The first horizontally fixed elongated member 2202 and the second horizontally fixed elongated member 2204, i.e., the fixed frame body 22A and the pair of outer fixed frame body portions 22B, are each provided with a plurality of free ball bearings 2602 spaced apart to form the horizontal support mechanism 26.

[0013] (Movable mechanism, upper frame) As shown in Figures 13 to 16, the movable mechanism section 24 is composed of a rectangular frame-shaped upper frame body 24A that forms the luggage placement section 2402, a rectangular frame-shaped movable frame body 24B that is arranged below the upper frame body 24A, and a plurality of pillar bodies 24C that connect the upper frame body 24A and the movable frame body 24B. As shown in FIG. 14, the upper frame 24A and the movable frame 24B have widths W3 and W4 along the width W1 direction of the lift table 12. The upper frame 24A is assembled into a rectangular frame shape using a plurality of elongated members, and in this embodiment is assembled into a rectangular frame shape, and has a plurality of openings 2404 that penetrate vertically. The upper frame 24A comprises a pair of elongated members 2410 for long sides that form the long sides of the rectangle, a pair of elongated members 2412 for short sides that connect both ends of the pair of elongated members 2410 for long sides, a pair of elongated members 2414 for end parts that connect the pair of elongated members 2410 for long sides near the pair of elongated members 2412 for short sides, and a central elongated member 2416 that connects the pair of elongated members 2410 for long sides at the center in the longitudinal direction. The pair of long-side elongated members 2410 extend along the width W1 direction of the lift table 12. In this embodiment, a rubber plate 2418 is attached to the upper surface of the upper frame 24A, in other words, to the upper surface of the luggage placement section 2402, more specifically, to the upper surfaces of a pair of elongated members 2410 for the long sides, a pair of elongated members 2412 for the short sides, a pair of elongated members 2414 for the end parts, and a central elongated member 2416, as shown by phantom lines in Figure 16.

[0014] (Length adjustment mechanism) As shown in Figures 13 to 19, the pair of elongated members 2410 for long sides are configured so that their length can be extended or contracted. Figures 13 to 16 show the pair of elongated members 2410 for long sides in their most contracted state, while Figures 17 to 19 show the pair of elongated members 2410 for long sides in their most extended state. The pair of long-side elongated members 2410 will now be described in detail. As shown in Figures 14, 17, and 18, each long side elongated member 2410 comprises a single inner member 2420 located at the innermost position, a pair of slide rails 2422 attached outside the inner member 2420 near the longitudinal ends of the inner member 2420, and a pair of outer members 2424 provided outside the pair of slide rails 2422 and each slidably connected to the slide rails 2422. Therefore, the upper frame 24A is provided with two inner members 2420, and four slide rails 2422 and four outer members 2424. A pair of short side elongated members 2412 connect the longitudinal ends of each pair of outer members 2424 , and a pair of end elongated members 2414 and a central elongated member 2416 connect the pair of inner members 2420 .

[0015] 15, 16, and 19, a plunger receiving plate 2423A having a plurality of positioning holes formed therein is provided on the underside of the slide rail 2422, and as shown in FIGS. 15 and 19, a plunger 2423 is provided on the underside of the slide rail 2422, with a locking pin that can be engaged with the positioning hole being biased by a coil spring in the direction of engaging with the positioning hole. An operator can adjust the protruding length of the outer member 2424 relative to the inner member 2420 by pulling out the knob of the plunger 2423 to pull out the locking pin from the positioning hole, sliding the outer member 2424 relative to the slide rail 2422, and locking the locking pin into the positioning hole at an appropriate location, and therefore the width W3 of the upper frame body 24A, i.e., the width W3 of the luggage loading section 2402, can be adjusted. It should be noted that such a length adjusting mechanism can employ various conventionally known structures and is not limited to the structure of the embodiment.

[0016] (bearing plate, column) As shown in FIG. 14, bearing plates 2430 each having a flat bearing surface facing downward are attached to a plurality of locations on the upper frame 24A. In this embodiment, six bearing plates 2430 are provided in total, two at each location on the underside of the pair of end elongated members 2414 and the central elongated member 2416. Each bearing plate 2430 is sized to be supported on the ball portion of the free ball bearing 2602 within the range in which the movable mechanism part 24 can move relative to the fixed mechanism part 22 when the movable mechanism part 24 is assembled to the fixed mechanism part 22. Also, as shown in Figures 13 and 14, pillars 24C are suspended from two points on the central elongated member 2416, and movable frame 24B is attached to the lower part of these pillars 24C, so that upper frame 24A and movable frame 24B move together.

[0017] (Horizontal support mechanism) As shown in Figure 6, the movable frame body 24B is assembled into a rectangular frame shape that is smaller than the rectangle of the fixed frame body 22A, and the movable frame body 24B is positioned inside the fixed frame body 22A with the movable mechanism part 24 supported by multiple free ball bearings 2602 of the fixed mechanism part 22 via the bearing plate 2430. Therefore, the movement range of the movable mechanism part 24 is determined by the movable frame body 24B abutting against the inside of the fixed frame body 22A, and the movement range restriction mechanism 28 that restricts the horizontal movement range of the movable mechanism part 24 on the fixed mechanism part 22 is composed of the fixed frame body 22A and the movable frame body 24B. In addition, a horizontal support mechanism 26 is formed by a plurality of free ball bearings 2602 provided in the fixed mechanism section 22 and a plurality of bearing plates 2430 provided in the movable mechanism section 24, which supports the luggage placement section 2402 so that it can move horizontally, including linear and rotational movement, within a 360-degree range around the luggage placement section 2402.

[0018] (movable frame) As shown in Figures 6 and 14, the movable frame body 24B has a movable first elongated member 2442 that can abut against the fixed first elongated member 2210, a movable second elongated member 2444 that can abut against the fixed second elongated member 2212, and a pair of vertical movable elongated members 2446 that connect both ends of the movable first elongated member 2442 to both ends of the movable second elongated member 2444 and can abut against a pair of inner vertical fixed elongated members 2208. The longitudinal centers of the first movable elongated member 2442 and the second movable elongated member 2444 are the center of the width W4 of the movable frame 24B, and are also the center of the width W3 of the luggage placement section 2402 and the upper frame 24A. As shown in Figures 20 and 21, when the movable frame body 24B abuts against the fixed first elongated member 2210, the luggage placement section 2402, movable frame body 24B, and movable mechanism section 24 are in a retracted position closest to the lifting mechanism 16. In the retracted position, the movable first elongated member 2442 of the movable frame body 24B abuts against the fixed first elongated member 2210, or the longitudinal ends of a pair of vertical movable elongated members 2446 of the movable frame body 24B abut against the fixed first elongated member 2210. As shown in Figures 22 and 23, when the movable frame body 24B abuts against the fixed second elongated member 2212, the luggage placement section 2402, movable frame body 24B, and movable mechanism section 24 are in the forward position furthest from the lifting mechanism 16. In the forward position, the movable second elongated member 2444 abuts against the fixed second elongated member 2212, or the longitudinal ends of the pair of vertically movable elongated members 2446 of the movable frame 24B abut against the fixed second elongated member 2212. Furthermore, when the movable frame 24B abuts against the pair of inner vertical fixed elongated members 2208, the load placement section 2402, the movable frame 24B, and the movable mechanism section 24 are placed at their limit positions for movement to the left and right sides. At the left and right lateral movement limit positions, the pair of vertical movable elongated members 2446 of the movable frame 24B abuts against the pair of inner vertical fixed elongated members 2208.

[0019] (movable frame) In other words, the retracted position, forward position, and left and right lateral movement limit positions of the movable frame body 24B are determined when the four sides of the rectangle formed by the movable frame body 24B are parallel to the four sides of the rectangle formed by the fixed frame body 22A and the movable frame body 24B abuts against the fixed frame body 22A. That is, Figure 20 shows a state in which the movable first elongated member 2442 abuts against the fixed first elongated member 2210, or the longitudinal ends of a pair of vertical movable elongated members 2446 of the movable frame body 24B abut against the fixed first elongated member 2210, causing the movable mechanism unit 24 to be in a retracted position, and the left vertical movable elongated member 2446 of the pair of vertical movable elongated members 2446 abuts against the inner vertical fixed elongated member 2208 on the left side of the fixed frame body 22A, causing the movable mechanism unit 24 to be in the left limit position. Also, Figure 21 shows the movable mechanism part 24 similarly positioned in the retracted position, and the right-hand vertical movable elongated member 2446 of the pair of vertical movable elongated members 2446 abutting against the inner vertical fixed elongated member 2208 on the right side of the fixed frame body 22A, so that the movable mechanism part 24 is positioned in the right-hand limit position. Also, Figure 22 shows a state in which the movable second elongated member 2444 abuts against the fixed second elongated member 2212, or the ends of a pair of vertically movable elongated members 2446 abut against the fixed second elongated member 2212, causing the movable mechanism unit 24 to be in an advanced position, and the left vertically movable elongated member 2446 of the pair of vertically movable elongated members 2446 abuts against the inner vertically fixed elongated member 2208 on the left side of the fixed frame body 22A, causing the movable mechanism unit 24 to be in the left limit position. Also, Figure 23 shows the movable mechanism unit 24 similarly positioned in the forward position, and the right-hand vertical movable elongated member 2446 of the pair of vertical movable elongated members 2446 abutting the inner vertical fixed elongated member 2208 on the right side of the fixed frame body 22A, with the movable mechanism unit 24 positioned in the right-hand limit position. Therefore, a movement range restriction mechanism 28 that restricts the horizontal movement range of the movable mechanism part 24 on the fixed mechanism part 22 is configured to include the fixed frame body 22A and the movable frame body 24B.

[0020] (locking mechanism) As shown in Figures 5, 6, and 8, the locking mechanism 30 is a mechanism that locks the movable mechanism part 24 so that it cannot move horizontally while the center of the movable frame body 24B is approximately aligned with the center of the fixed frame body 22A. The locking mechanisms 30 are provided one on each side in the width direction of the upper frame 24A. In this embodiment, a commercially available toggle clamp is used as the locking mechanism 30. As shown in FIG. 8, the toggle clamp comprises a clamp body 30A having a locking fitting and a handle, and a hook 30B to which the locking fitting is engaged and disengaged. In this embodiment, the clamp body 30A is provided on a pair of outer longitudinal fixed elongated members 2206 of the fixed mechanism part 22, and the hooks 30B are attached to a pair of end elongated members 2414 of the movable mechanism part 24. The movable frame 24B is positioned approximately in the center of the fixed frame 22A, and the sides of the fixed frame 22A are parallel to the sides of the movable frame 24B. When the movable frame 24B is in its neutral position, the handle is operated to lock the locking fitting into the hook 30B, thereby connecting the movable mechanism 24 to the fixed mechanism 22 and locking it so that it cannot move horizontally. When the movable frame body 24B is in its neutral position, the four sides of the movable frame body 24B are positioned away from the four sides of the fixed frame body 22A, so when the locking mechanism 30 is released by operating the handle, the movable frame body 24B can move in any direction around 360 degrees around the movable frame body 24B within the range in which it contacts the fixed frame body 22A, and can also swing.

[0021] (Floating prevention mechanism) As shown in FIGS. 5 to 7, the lift-up prevention mechanism 32 is a mechanism that prevents the movable mechanism part 24 from lifting up above the fixed mechanism part 22. The lift-up prevention mechanism 32 is configured to include a plurality of elongated lift-up prevention members 3202. In this embodiment, two anti-lifting members 3202 are provided. As shown in Figure 14, the two anti-lifting members 3202 are spaced apart in the longitudinal direction of the movable first elongated member 2442 and the movable second elongated member 2444, attached across the underside of the movable first elongated member 2442 and the underside of the movable second elongated member 2444, and extend in a direction perpendicular to the longitudinal direction of the movable first elongated member 2442 and the movable second elongated member 2444. When the movable mechanism 24 is in the retracted position, the plurality of anti-lifting members 3202 can abut against the lower surfaces of both the first fixed elongated member 2210 and the second fixed elongated member 2212 from below, as shown in FIGS. In addition, in this embodiment, as shown in Figures 22 and 23, when the movable mechanism part 24 is in the forward position, the multiple anti-lifting members 3202 are formed so that one end of their length is positioned at a position where they can abut against the lower surface of the fixed second elongated member 2212 from below, and the other end of their length is spaced apart from the fixed first elongated member 2210, leaving a gap between them. In addition, the multiple anti-lifting members 3202 may be formed so as to be able to abut from below against both the underside of the fixed first elongated member 2210 and the underside of the fixed second elongated member 2212 in both the retracted and advanced positions of the movable mechanism part 24, thereby making it possible to more stably prevent the movable mechanism part 24 from lifting up relative to the fixed mechanism part 22.

[0022] (Assembling the luggage placement mechanism to the lifting table) Next, the assembly of the luggage placement mechanism 20 to the lift table 12 will be described. After assembling the fixed mechanism section 22 and the movable mechanism section 24 excluding the lift-up prevention member 3202 , the movable frame 24 B of the movable mechanism section 24 is positioned inside the fixed frame 22 A of the fixed mechanism section 22 . As a result, the movable mechanism part 24 is supported by the multiple free ball bearings 2602 of the fixed mechanism part 22 via the bearing plate 2430 so as to be movable horizontally within the range in which the movable frame body 24B contacts the fixed frame body 22A. Finally, a plurality of anti-lifting members 3202 are attached across the lower surface of the first movable elongated member 2442 and the lower surface of the second movable elongated member 2444, thereby forming the luggage placement mechanism 20 consisting of the fixed mechanism part 22 and the movable mechanism part 24. Once the load placement mechanism 20 is constructed, it is attached to the second angle iron 1210 of the lift table 12 by means of thumb turn clamps 2214 provided on a pair of inner vertical fixed elongated members 2208 that constitute the fixed frame 22A. As a result, the fixed frame 22A is fixed to the lift-up table 12, and the luggage placement mechanism 20 is attached to the lift-up table 12.

[0023] (Air conditioner installation work) Once the luggage placement mechanism 20 is attached to the lift table 12, the movable mechanism section 24 is locked by the locking mechanism 30, and the air conditioner 40 shown by the dotted line in FIG. Next, the clamp 1402 of the luggage lifting device 10 shown in Figure 25 is connected to the connecting rod 5002 of the aerial work platform 50 shown in Figure 26, and the luggage lifting device 10 is moved following the aerial work platform 50 to the installation location of the air conditioner 40. As shown in Figure 26, the aerial work vehicle 50 is equipped with running wheels, a driving source such as a running motor or engine supported by the running wheels and driving the running wheels, a chassis 5004 equipped with a power battery, etc., a lifting mechanism 5006 provided on the chassis 5004, a work platform 5008 that is raised and lowered by the lifting mechanism 5006, and an operation panel (not shown) provided on the work platform 5008, and various operations such as driving and steering the aerial work vehicle 50 and raising and lowering the work platform 5008 are performed by operating the operating parts of this operation panel. In this embodiment, as shown in Figure 24, a total of two aerial work platforms 50 are used, and at the work site, another aerial work platform 50 is placed so that the luggage lifting device 10 is sandwiched between the two aerial work platforms 50. Then, a worker standing on the work scaffolding 5008 of the aerial work platform 50 uses a remote controller to raise the lifting table 12 and the luggage loading mechanism 20 until the bolt insertion holes of the flange 4002 of the air conditioner 40 are positioned near the bottom of the multiple hanging bolts 60. Once the air conditioner 40 has been raised until the bolt insertion holes of the flange 4002 are positioned near the lower ends of the multiple hanging bolts 60, the aerial work platform 50 is moved to move the luggage lifting device 10 following the aerial work platform 50, and rough alignment is performed so that the axis of the multiple hanging bolts 60 coincides with the axis of the bolt insertion holes of the flange 4002 of the air conditioner 40.

[0024] (Air conditioner installation work) Once rough alignment has been completed, the worker standing on the work platform 5008 of the aerial work platform 50 operates the handle to release the movable mechanism unit 24 from its locked state. Then, a worker standing on the work platform 5008 of the aerial work platform 50 moves the luggage placement section 2402 to fine-tune the alignment so that the axis of the multiple hanging bolts 60 coincides with the axis of the bolt insertion holes in the flange 4002 of the air conditioner 40. Once the axes of the multiple hanging bolts 60 and the axes of the bolt insertion holes in the flange 4002 of the air conditioner 40 are aligned, a worker standing on the work scaffolding 5008 of the aerial work platform 50 uses the remote controller to raise the lifting table 12 and the luggage loading mechanism 20, and inserts the multiple hanging bolts 60 into the bolt insertion holes in the flange 4002 of the air conditioner 40. Once the lower portions of the hanging bolts 60 have been inserted into the bolt insertion holes of the flange 4002 of the air conditioner 40, lock nuts are fastened to the lower portions of the hanging bolts 60, completing the installation of the air conditioner 40.

[0025] (Action, effect) The luggage placement mechanism 20 of this embodiment provides the following effects. The movable mechanism section 24 on which the air conditioner 40 is placed is supported by the horizontal support mechanism 26 so as to be movable horizontally within a 360-degree range around the luggage placement section 2402, so that fine adjustments for aligning the heavy air conditioner 40 at high places can be easily made by moving the luggage placement section 2402 with one hand, without having to perform the conventional work of pushing and moving the heavy air conditioner 40 on the lift table 12. This significantly reduces the burden on workers working at height, which is advantageous in improving work efficiency at height, shortening construction time, and reducing building costs. In addition, a movement range restriction mechanism 28 is provided to restrict the horizontal movement range of the movable mechanism part 24, which prevents the air conditioner 40 from moving more than necessary, which is advantageous in facilitating the alignment work between the multiple hanging bolts and the multiple bolt holes, shortening the construction period, and reducing the cost of the building.

[0026] In addition, the movable mechanism unit 24 has an upper frame body 24A that forms a luggage loading section 2402 at the top of the movable mechanism unit 24, and since the upper frame body 24A is assembled into a rectangular frame shape using multiple elongated members, the upper frame body 24A has multiple openings 2404 that penetrate in the vertical direction. Therefore, depending on the shape and type of heavy object placed on the luggage placement section 2402, various installation operations can be performed even from below the luggage placement section 2402, which is advantageous in increasing the usability and practical value of the luggage placement mechanism 20 at high altitudes. Furthermore, since a rubber plate 2418 is attached to the upper surface of the upper frame 24A, the air conditioner 40 can be moved integrally with the luggage placement section 2402, which is advantageous in terms of making fine adjustments to the air conditioner 40 efficiently. Furthermore, the pair of opposing elongated members 2410 for the long sides that make up the upper frame body 24A are configured to be adjustable in length and contraction, and therefore can accommodate the attachment of heavy objects such as various air conditioners 40 of different sizes, which is advantageous in increasing the usability and practical value of the luggage loading mechanism 20 at high altitudes.

[0027] Furthermore, the fixed frame body 22A and the movable frame body 24B that constitute the movement range restriction mechanism 28 may each be formed from a frame body of a shape other than a rectangle, such as a circle, but if they are each formed from a rectangular frame body, as in this embodiment, they can be easily manufactured by cutting and assembling commercially available rod material such as rolled steel, which is advantageous in reducing the cost of the luggage loading mechanism 20. In addition, the movable frame body 24B may be provided outside the fixed frame body 22A, but providing the movable frame body 24B inside the fixed frame body 22A reduces the space occupied by the movable frame body 24B compared to providing the movable frame body 24B outside the fixed frame body 22A, which is advantageous in making the movement range restriction mechanism 28 more compact and the luggage loading mechanism 20 more compact. Furthermore, the luggage placement mechanism 20 is equipped with a locking mechanism 30 that locks the fixed frame body 22A and the upper frame body 24A together so that they cannot move horizontally. Therefore, when a heavy object such as an air conditioner 40 is placed on the luggage placement section 2402 and moved, the heavy object does not move, and therefore the luggage lifting device 10 can be moved and the heavy object can be raised and lowered in a more stable state, which is advantageous in increasing the practical value of the luggage placement mechanism 20.

[0028] Furthermore, as in this embodiment, if the locking mechanism 30 is configured to lock the fixed frame body 22A and the upper frame body 24A so that they cannot be moved horizontally when the movable frame body 24B is positioned approximately in the center of the fixed frame body 22A, as in this embodiment, the air conditioner 40 can be roughly positioned in the locked state, and when fine adjustments are made, the locking mechanism 30 is released, and the movable frame body 24B becomes movable in either direction, which is advantageous in making fine adjustments easier. Furthermore, as in this embodiment, providing a lift-up prevention mechanism 32 that prevents the movable mechanism part 24 from lifting upward on the fixed mechanism part 22 is advantageous in moving the luggage lifting device 10 carrying a heavy object in a more stable manner.

[0029] Furthermore, when the fixed frame 22A is arranged inside the rectangular frame that defines the outline of the lift-up table 12 in plan view, as in this embodiment, spaces for arranging members are created below the fixed frame 22A and below the movable frame 24B. Therefore, by providing a plurality of elongated lift-up prevention members 3202, both ends of which can abut the lower surface of the movable frame 24B, on the lower surface of the movable frame 24B, the lift-up prevention mechanism 32 can be easily provided, which reduces the vertical dimension of the luggage placement mechanism 20 when assembled to the lift-up table 12 and is also advantageous in reducing the cost of the luggage placement mechanism 20. Furthermore, as in this embodiment, when the horizontal support mechanism 26 is constructed from a plurality of free ball bearings 2602 provided in the fixed mechanism section 22 and a plurality of bearing plates 2430 with flat bearing surfaces provided in the upper frame body 24A, a horizontal support mechanism 26 that supports the movable mechanism section 24 so that it can move in any direction can be easily obtained, and since the structure simply involves placing flat bearing surfaces on a plurality of free ball bearings 2602, assembly of the horizontal support mechanism 26 is also easy, which is advantageous in reducing the cost of the luggage loading mechanism 20. [Explanation of symbols]

[0030] 10. Luggage lifting device 12 Lift table 1202 Base member 1204 Tip member 1206 Side member 1208 No. 1 angle iron 1210 No. 2 angle iron 14 frames 1402 Clamp 16 Lifting mechanism 18 winch 1802 Pulley 1804 Wire 20 Luggage loading mechanism 22 Fixing mechanism section 22A Fixed frame 22B Outside fixed frame body part 2202 First horizontally fixed elongated member 2204 Second slender horizontally fixed member 2206 Outer longitudinal fixed slender member 2208 Inner longitudinal fixed slender member 2210 Fixed first elongated member 2212 Fixed second elongated member 2214 Thumb turn clamp 24 Movable mechanism part 24A Upper frame 24B Movable frame 24C column 2402 Luggage storage area 2404 Opening 2410 Long side elongated member 2412 Short side slender member 2414 End slender members 2416 Central slender member 2418 Rubber Plate 2420 Inner member 2422 Slide Rail 2423A Plunger Receiving Plate 2423 Plunger 2424 Outside member 2430 Bearing plate 2442 Movable first elongated member 2444 Movable second elongated member 2446 Vertically movable elongated member 26 Horizontal support mechanism 2602 free ball bearing 28 Movement range control mechanism 30 Locking mechanism 30A Clamp body 30B hook 32 Anti-floating mechanism 3202 Floating prevention material 40 Air conditioner 4002 flange 50 Aerial work platform 5002 Connecting rod 5004 Chassis 5006 Lifting mechanism 5008 Working scaffolding 60 Hanging bolt W1 Height adjustable table width W2 Width of the fixing mechanism W3 Width of upper frame and luggage compartment W4 Width of movable frame

Claims

1. A luggage placement mechanism attached to a lifting table of a luggage lifting device, The luggage placement mechanism includes: a fixing mechanism attached to the lift table; a movable mechanism having a luggage placement section on an upper surface; a horizontal support mechanism that supports the movable mechanism on the fixed mechanism so that the movable mechanism can move horizontally within a 360-degree range around the luggage placement section; a movement range limiting mechanism that limits the horizontal movement range of the movable mechanism part on the fixed mechanism part; A luggage placement mechanism for a luggage lifting device, comprising:

2. the lift table has a width in a direction perpendicular to a direction in which the lift table is lifted and lowered, the movable mechanism section has an upper frame body at its upper portion, in which a plurality of elongated members are assembled in the shape of a rectangular frame on the same plane, and a pair of opposing sides extend in a direction parallel to the width direction of the lift-up table; The luggage storage section is composed of the upper frame body.

2. The luggage placement mechanism for a luggage lifting device according to claim 1.

3. A rubber plate is attached to the upper surface of the upper frame.

3. The luggage placement mechanism for a luggage lifting device according to claim 2.

4. The pair of opposing elongated members that extend in a direction parallel to the width direction of the lift-up table and that constitute the upper frame are configured to be adjustable in extension and contraction.

3. The luggage placement mechanism for a luggage lifting device according to claim 2.

5. the fixing mechanism includes a fixing frame body in which a plurality of elongated members are assembled into a rectangular frame shape, and a pair of opposing sides extend in a direction parallel to the width direction of the lift-up table; the movable mechanism unit includes a movable frame body that is disposed below the upper frame body, in which a plurality of elongated members are assembled into a rectangular frame shape that is smaller than the fixed frame body, a pair of opposing sides extending in a direction parallel to the width direction of the lift-up table, the movable frame body being disposed inside the fixed frame body and moving integrally with the upper frame body; the range of movement is determined by the movable frame abutting against the inside of the fixed frame, The movement range restriction mechanism is configured to include the fixed frame and the movable frame.

3. The luggage placement mechanism for a luggage lifting device according to claim 2.

6. a locking mechanism that locks the fixed mechanism and the movable mechanism so that they cannot move in the horizontal direction; 6. A luggage placement mechanism for a luggage lifting device according to claim 5.

7. the locking mechanism locks the fixed mechanism unit and the movable mechanism unit so that they cannot move in a horizontal direction when the movable frame unit is positioned approximately in the center of the fixed frame unit.

7. A luggage placement mechanism for a luggage lifting device according to claim 6.

8. a lift-up prevention mechanism that prevents the movable mechanism from lifting up above the fixed mechanism; 7. A luggage placement mechanism for a luggage lifting device according to claim 6.

9. The lift table is provided in a rectangular frame shape, the fixed frame is disposed inside a rectangular frame that defines the outline of the lift-up table when viewed from above, a plurality of elongated anti-lifting members, both ends of which can come into contact with the lower surface of the fixed frame, are provided on the lower surface of the movable frame; The lift-up prevention mechanism is configured to include the plurality of lift-up prevention members.

9. A luggage placement mechanism for a luggage lifting device according to claim 8.

10. The horizontal support mechanism includes a plurality of free ball bearings provided in the fixed mechanism portion, and a plurality of bearing plates provided in the movable mechanism portion, each having a flat bearing surface facing downward and movably supported by the free ball bearings.

3. The luggage placement mechanism for a luggage lifting device according to claim 2.

Images