JP7625490B2 - Lifting device - Google Patents

Description

The present invention relates to a lifting device that raises and lowers a suspended load, and more specifically, to a lifting device that can raise and lower a suspended load using a hoisting rope and can remove the hoisting rope from a raised load or a suspended load placed on the ground.

A stadium is a facility designed for the purpose of playing or spectating a particular sport; baseball stadiums and soccer stadiums are typical examples. However, the number of sports (e.g. games) held at a stadium is generally only a few dozen per year, and therefore it is currently difficult to generate a stable profit throughout the year.

The Sports Agency has therefore decided to provide financial support for the formulation of development plans for stadiums and arenas through public-private partnerships, and is promoting the development of multi-purpose, complex facilities that can regularly host events other than sports, with an emphasis on making money. The Agency has set a goal of building multi-purpose, complex stadiums and arenas that prioritize making money nationwide by 2025.

Multipurpose stadiums that can be used for baseball, soccer, concerts, and other events are extremely advantageous in terms of revenue, as they can attract a steady stream of visitors throughout the year, and various proposals have been made regarding multipurpose stadiums. For example, Patent Document 1 proposes a multipurpose stadium in which the width (area) of the field can be changed by horizontally moving (sliding) some of the exterior walls installed around the field.

JP 2020-33721 A

The multipurpose stadium disclosed in Patent Document 1 is a stadium in which a smaller event space can be created than the normal competition space by moving the movable wall in a horizontal direction, and the field can be removed from the event space by moving the entire field in a horizontal direction. This allows for the stadium's original use of soccer, etc., and also allows concerts and other events to be held with a sense of realism by creating a small event space, and since the field is moved, various events can be held without worrying about damaging the natural grass. In this way, the invention disclosed in Patent Document 1 can achieve multiple purposes extremely effectively, but has the problem that various events cannot be held while maintaining the competition space because the movable wall is moved in a horizontal direction.

In order to hold sports and various events while maintaining the same space, it is conceivable to prepare a sports field (e.g., a grass field) and an event floor (e.g., a concrete or wooden floor) in a two-layer structure. When playing soccer or other sports, the sports field would be placed at ground level, while when holding a concert or other event, the sports field would be lifted high up so that the event floor could be used.

Usually, when raising or lowering a heavy load, such as on a sports field, a lifting means such as a winch (hereafter referred to as the "lifting means") and a hanging rope (such as a wire rope) are used. The most familiar example is an elevator, where one end of the hanging rope is fixed to a hatch (boarding and alighting space) via a pulley, and the lifting means raises and lowers the hatch by winding up and down the hanging rope.

Meanwhile, in conventional hoists (lifting devices) that use suspension ropes, such as elevators, the suspension rope is always connected to the suspended load (for example, an elevator hatch) and is never released. Therefore, if one were to attempt to raise and lower the competition field using suspension ropes as in the past, the suspension rope and the competition field would always be connected, meaning that the competition field, which is located at ground level, would be connected to numerous suspension ropes hanging down from above, creating an extremely inconvenient situation for both the athletes and spectators.

The objective of the present invention is to solve the problems of the prior art, that is, to provide a lifting device that can raise and lower a load using a suspending rope and can remove the suspending rope from a load placed on the floor.

The present invention was developed with a focus on providing a locking device at the lower end of the hoisting rope and a lockable device on the suspended load, making it possible to detachably lock these locking devices and lockable devices, and supporting the elevated load with a load support means, making it possible to disconnect the hoisting rope from the load. It is an invention based on a previously unconventional idea.

The lifting device of the present invention is a device for raising and lowering a load placed on a foundation floor, and is equipped with a ceiling body, a ceiling pulley, a hanging rope, a hanging rope lifting means, and a hanging load support means. The ceiling body is installed at a position higher than the foundation floor, and the ceiling pulley is rotatable in a substantially vertical (including vertical) plane and is attached to the ceiling body. The hanging rope is hung around the ceiling pulley and hangs down, the hanging rope lifting means is a means for raising and lowering the hanging rope, and the hanging load support means is a means for supporting the hanging load. The hanging rope and the hanging load are connected by engaging a locking device attached to the lower end of the hanging rope with a locking device of the hanging load, and the lifting means raises the hanging rope, which is connected to the hanging rope. The hanging load that has risen to the ceiling body is supported by the hanging load support means, making it possible to release the connection between the hanging load and the hanging rope (a state in which the hanging load does not fall even if the connection between the hanging load and the hanging rope is released). In addition, the lifting means can lower the suspension rope, thereby lowering the load connected to the suspension rope, and when the load is placed on the foundation floor, the load can be disconnected from the suspension rope.

The lifting device of the present invention can also be such that the engaging device is a protrusion that protrudes laterally from the side of the suspended load. In this case, the ceiling pulley is movable diagonally within a vertical plane, and by moving the ceiling pulley upward toward the suspended load, the engaging device comes into contact with the underside of the engaging device and is engaged with it.

The lifting device of the present invention can also be one in which multiple ceiling pulleys are attached to the ceiling body along the main axis (horizontal axis). A hanging rope is hung around each of the ceiling pulleys. In this case, the latched devices are arranged in a series along the side of the suspended load and are comb-shaped with multiple notches, and the latching devices are rod- or column-shaped (but arranged in the main axis direction) attached to the lower ends of the multiple hanging ropes. Then, with each hanging rope placed in the notches of the suspended load with its side facing the main axis direction, the latching devices and the latched devices are latched by abutting them below the latched devices.

The lifting device of the present invention can also be configured to include a left ceiling body and a right ceiling body that are arranged at approximately the same height (including the same). In this case, the ceiling pulley includes a left ceiling pulley attached to the left ceiling body and a right ceiling pulley attached to the right ceiling body, the suspension rope includes a left suspension rope that is hung around the ceiling pulley and a right suspension rope that is hung around the right ceiling pulley, the suspension rope hoisting means includes a left suspension rope hoisting means that raises and lowers the left suspension rope and a right suspension rope hoisting means that raises and lowers the right suspension rope, and the suspension load support means includes a left suspension load support means and a right suspension load support means. When a suspended load is placed on the foundation floor between the left suspension rope hanging from the left ceiling pulley and the right suspension rope hanging from the right ceiling pulley, with the left side positioned in the main axis direction and on the left suspension rope side and the right side positioned in the main axis direction and on the right suspension rope side, the suspension rope and the load are connected by engaging the locking device of the left suspension rope with the locking device provided on the left side of the load and the locking device of the right suspension rope with the locking device provided on the right side of the load. Then, the left lifting means pulls up the left suspension rope and the right lifting means pulls up the right suspension rope, causing the load connected to the suspension rope to rise, and the load that has risen to the ceiling body is supported by the left load support means and the right load support means.

The lifting device of the present invention may further include a sliding movement means. This sliding movement means is a means for sliding the load supported by the left and right load support means in the axial direction.

The lifting device of the present invention has the following advantages.
(1) For example, when used as a stadium for soccer, baseball, etc., it is possible to play the sports that were originally intended for it (soccer, baseball, etc.), and also to hold various events such as concerts while maintaining the same space as for these sports. In other words, it can be used for a variety of purposes, and as a result, the utilization rate of the stadium can be increased.
(2) The hanging rope can be detached from a suspended load (e.g., a field) placed on the floor and then wound up; in other words, the hanging rope can be removed from around the suspended load. Therefore, when used in a sports stadium, for example, sports can be played as usual and spectators can enjoy the event comfortably.
(3) Since the raised load is supported by the load support means, the load above can be supported safely. In addition, by removing the suspension rope from the load, the tension acting on the suspension rope can be released, which reduces damage to the suspension rope and enables it to be used for a long period of time.

FIG. 1 is a cross-sectional view showing a schematic diagram of an example of a lifting device according to the present invention. FIG. 1 is a plan view showing a schematic diagram of an example of a lifting device according to the present invention. 1A is a vertical cross-sectional view taken along the side of the load, and FIG. 1B is a vertical cross-sectional view taken along the A-A arrow direction in FIG. FIG. 4 is a front view showing a rod-shaped fastening device attached to the lower ends of multiple suspension ropes. 1A is a vertical cross-sectional view showing a schematic view of a load support means housed within a ceiling body, and FIG. 1B is a vertical cross-sectional view showing a schematic view of the load support means pulled out from the ceiling body. 1A is a vertical cross-sectional view showing a schematic of a ceiling pulley that has moved diagonally upward from its normal position, and FIG. 1B is a vertical cross-sectional view showing a schematic of a ceiling pulley that has moved diagonally downward from its normal position. FIG. 13 is a plan view of the field being slid in the main axis direction by the sliding means, as viewed from above. A flow chart showing the main steps of lowering a field supported by a load support means near the ceiling body to the foundation floor surface. A step diagram showing the main steps of lowering a field supported by a load support means near the ceiling body to the foundation floor surface. A flow chart showing the main steps of raising the field 200 placed on the foundation floor surface up to the ceiling body 101. A step diagram showing the main steps of raising the field 200 placed on the foundation floor surface up to the ceiling body 101.

An example of an embodiment of the lifting device of the present invention is described below with reference to the drawings.

1. Overall Overview The lifting device of the present invention is a device that raises and lowers (raises and lowers) a suspended load placed on a flat surface such as the ground outdoors, an indoor floor, or the ground level surface of a stadium (hereinafter, for convenience, referred to as the "foundation floor"), and is equipped with a ceiling body, a ceiling pulley, a suspension rope, a suspension rope raising and lowering means, a load support means, etc. The "ceiling body" is a structure that is installed at a position higher than the foundation floor, and is capable of resisting a considerable applied load (particularly, vertical force and bending moment associated with vertical force, etc.), such as a concrete slab or a steel truss structure.

A "ceiling pulley," which is a pulley that can rotate in a substantially vertical plane (including the vertical plane), is attached to the side of the ceiling body or in a space provided inside, and the "suspension rope" is hung down around this ceiling pulley. Suspension ropes can be made of various materials depending on the weight of the load, and for example, a wire rope is recommended when the load is heavy. A "fastening device," such as a hook or a rod-shaped fastening device described below, is attached to the lower end of the suspension rope hanging from the ceiling pulley, while the load is provided with a "fastened device," such as an eye bolt or a protrusion described below. The suspension rope and the load are connected by the fastening device at the lower end of the suspension rope being fastened to the fastened device of the load.

The "suspension rope lifting means" is a lifting device such as a winch or hoist, and, like the ceiling pulley, is installed on the side or in the interior space of a ceiling body. The suspension rope lifting means can raise the suspension rope by winding it up and lower it by winding it down (unwinding it), meaning it can raise and lower the fastener at the bottom end of the suspension rope or the load connected to the suspension rope. The suspension rope lifting means, ceiling pulley, and suspension rope are arranged in approximately the same (including the same) vertical plane, and each functions as a set, so for convenience, the series of combinations consisting of the suspension rope lifting means, ceiling pulley, and suspension rope will be referred to here as the "lifting body set."

The "load support means" supports a load that has risen to the height of the ceiling body, and is a sort of stopper that prevents the load from falling from that position (near the ceiling body). For example, the load support means can be structured so that it can be inserted and removed from the ceiling body (slidable left and right), and the load support means can be pulled out of the ceiling body and placed on the underside of the ceiling body or inserted into part of the ceiling body to support the load. The load support means does not require any other means, that is, it can support a load by itself, and therefore, once a load is supported by the load support means, the load will be maintained in that position (will not fall) even if the engagement between the locking device at the bottom end of the hanging rope and the locking device of the load is released.

The lifting device of the present invention, configured as described above, is capable of raising a load placed on the foundation floor and supporting the load that has risen to the ceiling. Specifically, the rope lifting means winds down the rope to lower the locking device at the bottom end of the rope, and when the locking device that has descended to the load is locked to the locked device, the rope lifting means then winds up the rope to raise the load connected to the rope, and the load that has risen to the ceiling is supported by the load support means, making it possible to release the lock between the locking device and the locked device.

2. Lifting Device Figure 1 is a cross-sectional view (a vertical cut) showing a schematic example of a lifting device 100 of the present invention, and Figure 2 is a plan view (a view seen from above) showing a schematic example of the lifting device 100 of the present invention. Note that the lifting device 100 of the present invention can be used to suspend any object as a load, but for convenience, an example will be described here in which a soccer field 200 in a soccer stadium is used as the suspended load.

When a relatively large, plate-shaped (or box-shaped) load such as the field 200 is to be used, each element of the lifting device 100 of the present invention may be arranged on both sides of the load, as shown in Fig. 1. That is, as shown in Fig. 1, the ceiling body 101 includes a left ceiling body 101L and a right ceiling body 101R, the ceiling pulley 102 includes a left ceiling pulley 102L and a right ceiling pulley 102R, the suspension rope 103 includes a left suspension rope 103L and a right suspension rope 103R, the suspension rope lifting means 104 includes a left suspension rope lifting means 104L and a right suspension rope lifting means 104R, the load support means 105 includes a left suspension load support means 105L and a right suspension load support means 105R, and the locking device 106 includes a left locking device 106L and a right locking device 106R. The left ceiling body 101L, left ceiling pulley 102L, left hanging rope 103L, left hanging rope lifting means 104L, hanging load support means 105L, and left fastening device 106L are arranged on the left side 201L side (left side in the figure) formed on the plate-shaped (or box-shaped) field 200, while the right ceiling body 101R, right ceiling pulley 102R, right hanging rope 103R, right hanging rope lifting means 104R, hanging load support means 105R, and right fastening device 106R are arranged on the right side 201R side (right side in the figure) formed on the field 200. The left ceiling body 101L and the right ceiling body 101R are arranged at approximately the same height (including the same).

When a relatively large, plate-shaped (or box-shaped) load, such as field 200, is to be suspended, it is advisable to arrange multiple "lifting body sets (a series of combinations consisting of a rope lifting means, ceiling pulley, and lifting rope)" as shown in Figure 2. For example, in Figure 2, 12 lifting body sets are arranged on each of the left ceiling body 101L and the right ceiling body 101R. In this case, it is advisable to arrange multiple ceiling pulleys 102 (left ceiling pulley 102L, right ceiling pulley 102R) along the same horizontal axis (hereinafter referred to as the "main axis"), and to arrange multiple rope lifting means 104 (left rope lifting means 104L, right rope lifting means 104R) along the same main axis. In addition, the hanging ropes 103 (left hanging rope 103L, right hanging rope 103R) stretched between the ceiling pulley 102 (left ceiling pulley 102L, right ceiling pulley 102R) and the hanging rope lifting means 104 (left hanging rope lifting means 104L, right hanging rope lifting means 104R) should be arranged in the direction of an axis perpendicular to the main axis (hereinafter referred to as the "secondary axis").

In addition, when each element of the lifting device 100 is arranged on both sides of the load, and multiple lifting body sets are arranged in the main axis direction, the field 200 (load) on the base floor surface should be arranged along the main axis direction. Specifically, the field 200 is arranged between the left hanging rope 103L hanging from the left ceiling pulley 102L and the right hanging rope 103R hanging from the right ceiling pulley 102L, so that the left side 201L of the field 200 is on the left hanging rope 103L side and its right side 201R is on the right hanging rope 103R side, and further so that the left side 201L of the field 200 is approximately parallel (including parallel) to the main axis direction on the left side, and its right side 201R is approximately parallel (including parallel) to the main axis direction on the right side. As mentioned above, the lifting device 100 of the present invention is not limited to a configuration in which each element is arranged on both sides of the suspended load, or multiple sets of lifting bodies are arranged in the main shaft direction, but depending on the weight and shape of the suspended load, each element can be arranged on only one side of the suspended load, or one lifting body set can be arranged.

The locking device 106 attached to the lower end of the hanging rope 103 is engaged with the locking device of the field 200 (suspended load) to connect the hanging rope 103 and the field 200. For example, a hook can be used as the locking device 106 and an annular jig (such as an eye bolt) can be used as the locking device. Alternatively, as shown in FIG. 3, a "protrusion 202" can be used as the locking device. FIG. 3 is a schematic diagram of a protrusion 202 formed on a side surface 201 of the field 200, where (a) is a vertical cross-sectional view seen in the direction along the side surface 201 (the main axis direction shown in FIG. 2), and (b) is a vertical cross-sectional view seen in the direction of the A-A arrow shown in FIG. 3(a) (the sub-axis direction shown in FIG. 2). As shown in FIG. 3(a), the protrusion 202 protrudes from the side surface 201 of the field 200, and a recess (a semicircular recess in the figure) is formed on the lower surface side. In addition, when the field 200 is lifted by the hanging ropes 103 on both sides (left hanging rope 103L and right hanging rope 103R), the engaging devices such as the protrusions 202 are of course provided on both side surfaces 201 (left side surface 201L and right side surface 201R).

When using the protrusion 202 as the engaging device, it is advisable to use a rod-shaped engaging device 106 as shown in FIG. 4. This rod-shaped engaging device 106 is rod-shaped or column-shaped with an axial dimension that is greater than the cross-sectional dimension, and can be solid or hollow (i.e., tubular). One rod-shaped engaging device 106 can be attached to the lower ends of multiple hanging ropes 103. For example, in FIG. 4, one rod-shaped engaging device 106 is attached to the lower ends of three hanging ropes 103. Of course, the example in FIG. 4 is not the only example, and one rod-shaped engaging device 106 can be attached to the lower ends of two or four or more hanging ropes 103, or one rod-shaped engaging device 106 can be attached to the lower ends of all (12 in FIG. 4) hanging ropes 103.

The rod-shaped locking device 106 is locked by abutting against the underside of the protrusion 202 (the object to be locked). For example, in FIG. 3(a), the rod-shaped locking device 106 is locked by fitting a part of it into a recess formed on the underside of the protrusion 202. Therefore, it is desirable to match the cross-sectional shape of the locking device 106 to the shape of the recess of the protrusion 202, such as by making both shapes circular or semicircular.

Incidentally, when a load such as the field 200 is to be suspended, a series of fastening devices (e.g., protrusions 202) are provided along the side 201 (left side 201L and right side 201R) of the field 200. However, if one rod-shaped fastening device 106 is attached to the lower ends of multiple suspension ropes 103, the suspension ropes 103 will interfere with the fastening devices. In this case, as shown in FIG. 3(b), it is advisable to form notches 203 in multiple locations on the protrusions 202 (fastening devices) and make the protrusions 202 comb-shaped, so to speak. By placing the suspension ropes 103 within the notches 203, the rod-shaped fastening devices 106 can be fitted into the recesses of all the protrusions 202. In FIG. 3(b), multiple independent protrusions 202 are installed with a space between them, but the configuration is not limited to this, and a portion (for example, a portion on the side 201 side of the field 200) can be formed continuously, but a notch 203 can be formed in the portion where the hanging rope 103 is placed.

The load support means 105 can be accommodated in the ceiling body 101 and can be slid left and right (in the sub-axis direction shown in FIG. 2) so that it can be pulled out from the ceiling body 101. FIG. 5 is a vertical cross-sectional view showing the load support means 105 that can slide left and right, where (a) shows the load support means 105 accommodated in the ceiling body 101 and (b) shows the load support means 105 pulled out from the ceiling body 101. In this case, when the field 200 rises, the load support means 105 is accommodated in the ceiling body 101 so as not to hinder the lifting, while after the field 200 rises, the load support means 105 can be pulled out from the ceiling body 101 to support the field 200. In addition, when sliding the load support means 105, various types of power that have been used in the past can be used, such as a winch or other hoisting device, hydraulic pressure, pneumatic pressure, electricity, etc. Additionally, multiple independent load support means 105 can be arranged side-by-side in the axial direction (Figure 2), or an integrated load support means 105 can be installed that is continuous in the axial direction.

The ceiling pulley 102 can also be structured to be movable in a diagonal direction within a vertical plane. FIG. 6 is a vertical cross-sectional view showing a ceiling pulley 102 that can move in a diagonal direction within a vertical plane, where (a) shows the ceiling pulley 102 that has moved diagonally upward from its normal position (the position of the dashed line in the figure), and (b) shows the ceiling pulley 102 that has moved diagonally downward from its normal position (the position of the dashed line in the figure). In this case, the movement of the ceiling pulley 102 can lock the locking device 106 to the locking device (e.g., the protrusion 202) of the field 200, and can also release the locking device. Specifically, as shown in FIG. 6(a), when the ceiling pulley 102 moves diagonally upward from its normal position (the position of the dashed line in the figure), the locking device 106 is positioned below the protrusion 202 so as to slip in, and as a result, the rod-shaped locking device 106 can be fitted into the recess of the protrusion 202. On the other hand, as shown in FIG. 6(b), when the ceiling pulley 102 moves diagonally downward from its normal position (the position shown by the dashed line in the figure), the locking device 106 comes out of its position below the protrusion 202, and as a result, the locking device 106 is released from the protrusion 202. Note that a hydraulic system is preferable since a movement of about 50 to 100 cm is sufficient for the load support means 105, but this is not limiting and various conventionally used power sources can also be used.

The lifting device 100 of the present invention can further include a "slide movement means" that moves the load supported by the load support means 105 (load support means 105L and load support means 105R) horizontally in the main axis direction. FIG. 7 is a plan view of the field 200 sliding in the main axis direction by the slide movement means, seen from above. In this case, the use of the base floor surface after the field 200 is raised (i.e., removed) is diversified. That is, the field 200 is not slid in rainy weather to be used as a roof, while the field 200 is slid by the slide movement means in sunny weather. In addition, when sliding the field 200, various types of power that have been used conventionally can be used, such as a hoisting device such as a winch, hydraulic pressure, pneumatic pressure, electricity, etc. Also, in FIG. 7, the two divided left and right fields 200L and 200R are slid in opposite directions, but this is not limited to this, and it is also possible to have a single (i.e., undivided) field 200 that slides in one direction.

3. Example of Use An example of lowering the field 200 to the foundation floor surface using the lifting device 100 of the present invention will be described with reference to Figures 8 and 9. Figure 8 is a flow diagram showing the flow of the main steps for lowering the field 200 supported by the suspended load support means 105 near the ceiling body 101 to the foundation floor surface, and Figure 9 is a step diagram showing the main steps for lowering the field 200 supported by the suspended load support means 105 near the ceiling body 101 to the foundation floor surface.

First, the locking device 106 is locked to a locking device (e.g., the protrusion 202) of the field 200 supported by the load support means 105 near the ceiling body 101 (Step 11 in FIG. 8). For example, if the ceiling pulley 102 is located diagonally downward from its normal position (position indicated by the dashed line in the figure) as shown in FIG. 6(b), the ceiling pulley 102 is moved diagonally upward to return it to its normal position, and the rod-shaped locking device 106 is fitted into the recess of the protrusion 202.

When the locking device 106 is locked to the protrusion 202 as shown in FIG. 9(a), the support of the field 200 by the load support means 105 is released (Step 12 in FIG. 8). For example, as shown in FIG. 6(a), the ceiling pulley 102 is moved diagonally upward from its normal position (the position indicated by the dashed line in the figure) to lift the field 200 slightly. As a result, the load support means 105 is released from the weight of the field 200, and the load support means 105 can be slid so as to be accommodated within the ceiling body 101 as shown in FIG. 9(b), i.e., the support of the field 200 by the load support means 105 is released.

When the support of the field 200 by the load support means 105 is released, the ceiling pulley 102 is returned to its normal position, and the hanging rope 103 is wound down by the hanging rope lifting means 104, and the field 200, which is hooked to the hook 106, is lowered to the foundation floor surface as shown in FIG. 9(c) (Step 13 in FIG. 8). Then, when the field 200 lands on the foundation floor surface, the hook 106 is released from the protrusion 202 (Step 14 in FIG. 8). For example, as shown in FIG. 9(d), the ceiling pulley 102 is moved diagonally downward from the normal position to release the hook 106 from the protrusion 202.

When the engagement between the protrusion 202 and the locking device 106 is released, the hanging rope 103 is wound up by the hanging rope lifting means 104, and the locking device 106 is raised to the ceiling body 101 as shown in FIG. 9(e) (Step 15 in FIG. 8). This removes the hanging rope 103 from around the field 200 (i.e., ground level), creating a comfortable environment for both players and spectators.

Next, an example of lifting the field 200 to the ceiling body 101 using the lifting device 100 of the present invention will be described with reference to Figures 10 and 11. Figure 10 is a flow diagram showing the flow of the main steps for lifting the field 200 placed on the foundation floor surface to the ceiling body 101, and Figure 11 is a step diagram showing the main steps for lifting the field 200 placed on the foundation floor surface to the ceiling body 101.

First, the hanging rope 103 is wound down by the hanging rope lifting means 104, and the locking device 106 is lowered as shown in FIG. 11(f) (Step 21 in FIG. 10). Then, when the locking device 106 descends to the field 200, the locking device 106 is locked to the protrusion 202, and the hanging rope 103 and the field 200 are connected (Step 22 in FIG. 10). For example, as shown in FIG. 11(g), the ceiling pulley 102, which is positioned diagonally downward from the normal position, is moved diagonally upward to return to the normal position, and the locking device 106 is locked to the protrusion 202.

When the locking device 106 is locked to the protrusion 202, the hanging rope 103 is wound up by the hanging rope lifting means 104, and the field 200 locked to the locking device 106 is raised to the ceiling body 101 as shown in FIG. 11(h) (Step 23 in FIG. 10). When the field 200 has risen to the ceiling body 101, the hanging load support means 105 is slid and pulled out from the ceiling body 101 as shown in FIG. 11(i) (Step 24 in FIG. 10). At this time, the field 200 is lifted so that there is a slight gap between the underside of the field 200 and the hanging load support means 105, i.e., the weight of the field 200 is entirely borne by the lifting body set, so that the hanging load support means 105 can be smoothly pulled out.

When the load support means 105 is pulled out from the ceiling body 101, the field 200 is supported by the load support means 105 (Step 25 in FIG. 10). Specifically, the rope lift means 104 winds down the rope 103 slightly, and the field 200 is lowered as shown in FIG. 11(j). As a result, the gap between the bottom surface of the field 200 and the load support means 105 disappears, that is, the weight of the field 200 is entirely borne by the load support means 105. When the field 200 is to be slid in the main axis direction, the engagement between the protrusion 202 and the locking device 106 is released (Step 26 in FIG. 10). For example, as shown in FIG. 11(k), the ceiling pulley 102 is moved diagonally downward from the normal position, and the engagement between the protrusion 202 and the locking device 106 is released. This releases the tension acting on the hanging rope 103, which reduces damage to the hanging rope 103 and enables it to be used for a long period of time. After that, the field 200 is slid in the axial direction by the sliding means.

The lifting device of the present invention can be used in a variety of facilities, including sports facilities such as soccer stadiums, baseball stadiums, and athletic stadiums, as well as entertainment facilities for various events such as concerts, exhibitions, and trade fairs.

100 Lifting device of the present invention 101 Ceiling body (of lifting device) 101L Left ceiling body (of ceiling body) 101R Right ceiling body (of ceiling body) 102 Ceiling pulley (of lifting device) 102L Left ceiling pulley (of ceiling pulley) 102R Right ceiling pulley (of ceiling pulley) 103 Suspension rope (of lifting device) 103L Left suspension rope (of suspension rope) 103R Right suspension rope (of suspension rope) 104 Suspension rope hoisting means (of lifting device) 104L Left suspension rope hoisting means (of suspension rope hoisting means) 104R Right suspension rope hoisting means (of suspension rope hoisting means) 105 Suspension support means (of lifting device) 105L Suspension support means (of suspension support means) 105R Suspension support means (of suspension support means) 106 Locking device (of lifting device) 106L Left locking device (of locking device) 106R Right locking device (of locking device) 200 Field 200L Left field (of field) 200R Right field (of field) 201 Side (of field) 201L Left side (of side) 201R Right side (of side) 202 Projection (of field) 203 Notch (of field)

Claims (5)

A device for raising and lowering a suspended load placed on a foundation floor,
A ceiling body installed at a position higher than the foundation floor surface;
A ceiling pulley attached to the ceiling body and rotatable in a vertical or approximately vertical plane;
A hanging rope hung around the ceiling pulley;
A hoisting rope lifting means for lifting and lowering the hoisting rope;
A load support means capable of supporting the load,
The hanging rope and the load are connected by engaging a locking device attached to the lower end of the hanging rope with a locking device of the load,
The lifting means lifts the load connected to the suspension rope by pulling up the suspension rope,
The load that has risen to the ceiling body is supported by the load support means, whereby the load and the suspension rope can be released from each other,
The lifting means lowers the suspension rope to lower the load connected to the suspension rope,
When the load is placed on the foundation floor, the load can be disconnected from the suspension rope.
A lifting device characterized by: The engaging member is a protrusion protruding laterally from a side surface of the suspended load,
The ceiling pulley is movable in a diagonal direction within a vertical plane,
By moving the ceiling pulley upward and toward the load, the locking tool abuts against the bottom of the locking tool, and the locking tool is locked to the locking tool.
2. The lifting device according to claim 1. A plurality of the ceiling pulleys are attached to the ceiling body along a main axis which is a horizontal axis, and the hanging rope is wound around each of the ceiling pulleys.
The engaging member is provided in a series along the side surface of the suspended load and has a comb shape with a plurality of notches formed therein,
The locking device is attached to the lower ends of the plurality of suspension ropes and is rod-shaped or column-shaped and arranged in the main axis direction,
With each of the suspension ropes placed in the notches of the suspended load placed so that the side surface is in the main axis direction, the locking device and the locked device are locked together by abutting the locking device against the bottom of the locked device.
3. The lifting device according to claim 2. The load is a plate or box having a left side and a right side,
The ceiling body is configured to include a left ceiling body and a right ceiling body that are arranged at the same or approximately the same height,
The ceiling pulley includes a left ceiling pulley attached to the left ceiling body and a right ceiling pulley attached to the right ceiling body,
The suspension rope includes a left suspension rope wound around the front left ceiling pulley and a right suspension rope wound around the front right ceiling pulley,
The hoisting rope lifting means includes a left hoisting rope lifting means for lifting and lowering the left hoisting rope, and a right hoisting rope lifting means for lifting and lowering the right hoisting rope,
The load support means includes a left load support means and a right load support means,
The suspended load is placed on the foundation floor surface between the left suspension rope hanging down from the left ceiling pulley and the right suspension rope hanging down from the right ceiling pulley, and is disposed on the left suspension rope side so that the left side surface is in the main axis direction, and is disposed on the right suspension rope side so that the right side surface is in the main axis direction,
The hanging rope and the load are connected by engaging the locking device of the left hanging rope with the locking device provided on the left side surface of the load, and by engaging the locking device of the right hanging rope with the locking device provided on the right side surface of the load,
The left lifting means pulls up the left suspension rope, and the right lifting means pulls up the right suspension rope, thereby lifting the load connected to the suspension rope,
The left load support means and the right load support means support the load that has risen to the ceiling body.
4. The lifting device according to claim 3. Further provided with a slide moving means for sliding the load supported by the left load support means and the right load support means in the main axis direction.
5. The lifting device according to claim 4.

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