JP7362739B2 - Rope guide device, electric hoist and crane system - Google Patents

Description

The present invention relates to an electric hoist having a rope guide device and a crane system with the electric hoist. Note that the electric hoist includes a so-called hoist.

Factories and the like are equipped with electric hoisting machines and cranes with electric hoisting machines that move suspended loads in the vertical direction and move the loads along rails installed on the ceiling. The electric hoist and the crane with the electric hoist are equipped with a travel motor, and by driving this travel motor, the electric hoist and the crane with the electric hoist move along the rail. The hoist is equipped with a rope drum around which a rope is wound, and the rope drum is rotated by a motor. Examples of such an electric hoist and a crane with an electric hoist include Patent Document 1 and Patent Document 2.

US Patent Application Publication No. US2017/0240392 Patent No. 5814722

The invention described in Patent Document 1 allows the rope guide to be used for rope drums having different diameters. However, when actually attached to a rope drum with a large diameter, the outside and inside have the same curvature, so in order for the guide roll to rotate on the rope drum, the cross-sectional shape of the connected rope guide body must be Width increases. There is a problem in that sufficient space is required between the rope drum and the frame, which increases the size. Further, when the relative position between the guide roll and the main body of the rope guide is fixed and the wire rope diameter or the height of the rope drum groove changes, the rope guide main body comes into contact with the rope drum or the wire rope. In that case, the problem arises that parts of different dimensions must be used and that one-size-fits-all parts cannot be used.

Furthermore, the invention described in Patent Document 2 describes a crane traveling device that can easily align the traveling center axes of wheels lined up in the traveling direction, but does not take into consideration the fixing and installation of wire ropes. It wasn't.

As described above, in both Patent Documents 1 and 2, fixing and installation of the wire rope are not considered, and flexibility and versatility are not considered in the structure of the rope drum. In these conventional technologies, a semicircular groove corresponding to the diameter of the wire rope is provided in a spiral circumference on the rope drum of the electric hoist and the crane with the electric hoist. wrapped along the groove. In the case of a rope guide device that is attached to cover the groove of a rope drum, the shape of the rope groove changes when the diameter of the wire rope to be wound or the diameter of the rope drum changes. For this reason, it is necessary to match the curvature dimension for each wire rope diameter and drum diameter, leading to a decrease in manufacturing efficiency.

Therefore, in the present invention, the module is composed of a plurality of modules (for example, chain links) connected to each other in a ring, and the number of the chain links is set according to the diameter of the rope drum. Of the plurality of chain links, two consecutive chain links are not provided with guide rollers, and the other chain links are installed so as to skip one of the chain links on which the guide roller is installed, and the plurality of chain links are provided with guide rollers. When the number of chain links is even , the guide roller is installed so as to skip one of the chain links for multiple chain links, and one end of the chain link has a square hole and is recessed from the other parts. The present invention proposes a rope guide device having a rope guide in which the other end of the chain link has a circular hole, and the square hole and the circular hole of the chain link adjacent to the chain link are connected by a connecting bar. In this case, it is preferable to increase the number as the diameter becomes larger. Further, an electric hoist and a crane system with an electric hoist equipped with this rope guide device are also an aspect of the present invention.

Further, one aspect of the present invention includes varying numerical values regarding the outer diameter and inner diameter of each chain link. In this case, it is preferable that the curvature of the outer diameter is smaller than the curvature of the inner diameter (the radius of curvature of the outer diameter is larger).

Furthermore, in one aspect of the present invention, it is more preferable that each of the plurality of chain links has the same dimensions.

In addition, regarding the above configuration, a rope guide device is attached to the rope drum, the movable range of the drawn-out part of the wound wire rope is limited, and a notch is provided to prevent the groove from moving laterally into more than one part. Applicable to rope drums.

According to the present invention, it is possible to provide a rope guide that is applicable to various rope drum dimensions, that is, has more flexibility and versatility.

BRIEF DESCRIPTION OF THE DRAWINGS It is an external perspective view of the whole structure of the crane system with the electric hoist 1 of one Example of this invention. 1 is a partial cross-sectional view of the overall configuration of an electric hoist 1 according to an embodiment of the present invention. FIG. 2 is an external perspective view of a rope guide 43 attached to a rope drum 37 in an electric hoist 1 according to an embodiment of the present invention. FIG. 4 is a front view and a side view of a rope guide 43 according to an embodiment of the present invention. FIG. 4 is an external perspective view of a rope guide 43 according to an embodiment of the present invention. FIG. 4 is a perspective view of a chain link 44 according to an embodiment of the present invention. FIG. 1 is an exploded view of a chain link connection structure according to an embodiment of the present invention. A rope guide stopper 53 according to an embodiment of the present invention is shown. The structure of a support arm 48 according to an embodiment of the present invention is shown. 10 is an exploded view of the structure of the support arm 48 of one embodiment of the present invention in FIG. 9; FIG. FIG. 5 is a perspective view of a wire rope floating prevention device 52 according to an embodiment of the present invention. It is an external view of the rope drum 37 of one Example of this invention. FIG. 3 is an external view of a rope drum 37 provided with a rope guide 43 in an embodiment of the present invention.

An embodiment of the rope guide according to the present invention will be described below with reference to FIGS. 1 to 13. Note that the present invention is not limited to the illustrated example.

First, the overall configuration of a crane with an electric hoist will be explained using Fig. 1. As a traverse movement mechanism, there are traveling rails 11a and 11b arranged to face each other in a pair, and a crane saddle 20a having a driving wheel 25a for traveling and a driven wheel 26a is installed on the traveling rail 11a so as to be able to travel. has been done. A crane saddle 20b including a driving wheel 25b and a driven wheel 26b is movably installed on the traveling rail 11b. Further, the crane saddles 20a and 20b are connected by a girder 10.

An electric trolley 2 is installed on the girder 10 so as to be movable on the girder 10, and is provided with a saddle control section 12 that controls crane saddles 20a and 20b. An electric hoist 1 for moving the load up and down is attached to the electric trolley 2, and the electric hoist 1 is equipped with a crane hook 4 for suspending the load. The electric hoist 1 is also equipped with a hoist control unit 5 that controls the electric hoist 1 and the electric trolley 2, and an operation input device 3 that operates the crane with the electric hoist. There is.

The system of this embodiment includes an electric trolley 2, an electric hoist 1, a crane hook 4, and a hoist control section 5.

Next, the operation of the electric hoist-equipped crane will be explained using FIG. 1. When the operator inputs an operation using the operation input device 3, the hoisting machine control unit 5 controls the movement of the electric hoisting machine 1 and the electric trolley 2 according to the input control signal, and attaches the hoisting machine to the crane hook 4. The loaded load can be moved in the Z direction and -Z direction or in the X direction and -X direction. Similarly, the saddle control unit 12 controls the movement of the crane saddles 20a and 20b in accordance with a control signal input by the operation input device 3, and moves the load attached to the crane hook 4 in the Y direction and the -Y direction. It can be moved.

Next, the overall configuration of the electric hoist 1 of this embodiment will be described using FIG. 2. FIG. 2 shows an example of the rope guide device of this embodiment.

In FIG. 2, the electric hoist 1 is rotatably supported by a shaft 34 inside a hoist frame 30, and is rotatably driven by a drive device to wind up and unwind a wire rope 36. It has a drum 37. On the outside of the hoist frame 30, an electric motor 31 as a drive device for rotating the rope drum 37, a brake 35 as a braking mechanism for the electric motor 31, and a reducer 40 for adjusting the rotation speed of the rope drum 37 are combined. Installed. Therefore, the drive shaft 32 of the electric motor 31 and the driven shaft 41 of the reducer 40 are connected by the shaft coupling 33, and rotation is transmitted thereto. The shaft 34 of the rope drum 37 is connected to the final gear stage of the reducer 40, and the rope drum 37 is rotated using the power of the electric motor 31.

The rope drum 37 is a cylindrical component that winds up and lets out the wire rope 36, and is rotatably supported by the hoist frame 30. The outer periphery of the rope drum 37 has a concave rope groove into which the wire rope 36 is fitted. The rope groove is formed in a spiral shape on the outer periphery of the rope drum 37, the groove size is changed according to the diameter of the wire rope 36, and is provided so that the wire ropes 36 can be regularly aligned without overlapping.

Here, FIG. 12 shows an external view of the rope drum 37. A wire rope 36 is wound around a rope groove provided in a rope drum 37. Figure 3 shows how the wire rope is wound. In FIG. 3, a rope guide 43 is shown attached to the outer peripheral side of the rope drum 37 so as to surround the rope drum 37 and the wire rope 36 being wound up. When the wire rope 36 to be hoisted is wound up and unwound by the rope groove, the hoisting rope, when wound or unwound from the rope groove, performs the following functions.
The rope guide 43 restricts the position and operation of the winding and unwinding section, that is, by guiding it, the wire rope 36 to be wound up can be wound up and unwound along the helical rope groove of the rope drum 37.

When the rope drum 37 rotates and the wire rope 36 to be wound up is wound around the outer periphery of the rope drum 37 and unwound, the wire rope 36 to be wound up is rolled up in the longitudinal direction of the drum. Move along the groove. As the rope moves to the right or left in the axial direction, the rope guide 43 in FIG. 4 is composed of a chain link 44, an opposite chain link 45, and a connecting bar 46. The wire rope 36 to be hoisted includes a rope guide element in the winding and unwinding position shown in FIG. will be placed in It also includes a member configured to move on the surface of the rope drum 37 or the wire rope 36 to be wound up and guide the wire rope 36 to be wound up or unwound onto the rope drum 37 . The rope guide 43 is a chain-like component comprising chain links 44 interconnected to form a link-like entity extending around the entire rope drum 37, including a rope guide device, a wire rope anti-floating device 52 and a control. Components can be attached.

The length of the chain links 44 constituting the rope guide 43 is determined based on the polygon that circumscribes the cross-sectional cylinder of the rope drum having a small diameter. The curvature of the outside (outside diameter) of the chain link 44 is based on the curvature of the largest diameter attached to a rope drum with a smaller diameter. The curvature of the inside (inner diameter) should be approximately half that of the outside. Note that the inside and outside of the chain link 44 refer to the rope drum 37 side when the rope guide 43 is configured as the inside, and the opposite side as the outside.

As a result, the rope guide 43 can rotate in the space between the rope drum 37 and the hoist frame 30, and a space can also be left in which the wire rope floating prevention device 52 is installed. Furthermore, the small inner curvature allows the chain link 44 to approach the rope drum 37 when attached to a rope drum with a large diameter. Therefore, even if the number of chain links 44 and connection bars 46 is increased, rotation can be made in the space between the rope drum 37 having a large diameter and the hoist frame 30. If the required number of chain links is an odd number depending on the rope drum diameter, guide rollers are installed as shown in Figure 5. Guide rollers are not provided for two consecutive chain links among the plurality of chain links. For other chain links, install the guide roller so as to skip one of the chain links , and in case of an even number, for multiple chain links, skip one of the chain links where the guide roller is installed. By installing it in such a way that the rope guide is installed , the force supporting the rope guide can be balanced and a stable position can be achieved.

In this example, the curvature of the inner diameter is about half of the curvature of the outer diameter, but the present invention also includes different curvatures. Furthermore, the present invention does not limit the curvature to about half, and also includes a configuration in which the curvature of the outer diameter is smaller than the curvature of the inner diameter (the radius of curvature of the outer diameter is larger). Furthermore, in the case where the curvatures of the chain links 44 are not constant (consisting of curves with a plurality of curvatures on either the outside or inside), the configuration is such that representative values for the outside and inside of the chain links 44 are used.
The representative value includes using any one of an average value, a median value, and a plurality of curvatures.

Further, FIG. 13 shows an external view of the rope drum 37 provided with a rope guide 43 consisting of a plurality of chain links 44. In this way, the rope drum 37 is installed so as to annularly surround the rope guide 43. In this way, for installation, the rope guide 43 is constructed by aligning the chain links 44 with the same dimensions and changing the number of chain links 44 depending on the shape and size of the rope drum 37. This makes it possible to configure the rope guide 43 suitable for the rope guide 43 while suppressing the manufacturing cost of the chain link 44.

However, the dimensions of the chain links 44 do not have to be the same. In this case, the outer and inner curvatures of the entire rope guide 43 are changed. Overall means to use representative values. Examples of the representative value include using one of the average value, median value, and curvature of each chain link 44.

FIG. 6 shows a perspective view of the chain link 44 alone. As described above, the chain link 44 has a smaller curvature on the outside (bottom side in the drawing) than on the inside (top side in the drawing).

Next, details of the assembly and main parts of the rope guide 43 will be explained using FIGS. 7 to 11.

First, FIG. 7 shows a diagram in which the rope guide 43 is being assembled using a plurality of chain links 44. In FIG. 7, the chain links 44 constituting the rope guide 43 are all parts of the same size, each having a rectangular hole 44a on one side, and are fixed to the connecting bar 46 when assembled. . There is a thin protrusion 44c on the outer surface of the square hole 44a, which can increase the frictional force and reduce slippage when connecting with another chain link 44. The work of attaching it to the rope drum 37 also becomes easier. A circular hole 44b is provided on the opposite side of the square hole 44a of the chain link, so that the angle can be adjusted when attached to rope drums of different diameters. Both ends of the connecting bar 46 have a thread groove, a rectangular protrusion, and a cylinder arranged in this order from the outside, so that they can be easily separated when assembled with the chain link 44.

One side of the chain links 44 is concave, and when all the chain links 44 are connected, the sides become an entity with a flat surface. Therefore, it becomes easy to install accessory devices such as the rope guide stopper 53 and the wire rope floating prevention device 52, and it is also possible to adjust their positions. Furthermore, alignment becomes easier when managing parts.

Next, a configuration for suppressing movement in the circumferential direction will be described. In FIG. 8, a rope guide stopper 53 is provided on the chain link 44 in order to prevent the rope guide 43 from moving in the circumferential direction with respect to the rope drum 37 after being surrounded by the rope drum 37 and continuous. The rope guide stopper 53 is attached to two locations on the rope guide 43, hits the upper and lower parts of the frame opening, and fixes the circumferential direction. Furthermore, in order to minimize wear on the hoisting machine frame 30 when the rope guide 43 moves in the axial direction, guide rollers 55 on the frame are also installed where the rope guide 43 touches the frame, so that it does not slip on the edge of the frame. Instead, I decided to let it roll. Two holes are used in the main body of the rope guide to regulate the movement range of the rope guide stopper 53, and the structure is such that the position can be adjusted within a certain range. By providing a guide roll adjustment plate 57 to which the frame guide roller 55 is attached, it is also possible to change the contact position between the frame guide roller 55 and the hoist frame 30.

Next, the structure of the support arm 48 that supports the rope guide 43 will be explained using FIGS. 9 and 10. FIG. 9 is a diagram of the support arm 48 assembled, and FIG. 10 is a diagram of each component constituting the support arm 48 before assembly, that is, drawn separately. Please refer to both figures below. The support arm 48 that supports the rope guide 43 is supported by a structure having a spring, and the rope guide 43 maintains an appropriate distance from the center axis of the rope guide 43 and the center axis of the rope drum 37 against a change in diameter within a certain range. can be matched. Further, the rotating shaft 49 of the arm to which the guide roller 51 is attached can also be moved in the axial direction, and even if the distance between the grooves of the rope drum groove changes, the guide roller 51 can be rotated around the center line of the groove. The rotation axis 49 of the arm has a shape that allows the arm to adjust its position in the rotation axis direction between the links. The rotary shaft fixed to the main body of the rope guide 43 forms a circular truncated shape.A coupling 50 with a slope on the inside is set according to the slope of the adjustment position and the upper and lower diameters, and the outside has a flat cylindrical shape. . Then, the rotation shaft of the arm is fitted to the outside of the coupling 50, and a compression spring 56 is installed on the narrow side of the rotation shaft to press and support the rotation shaft 49 of the arm of the support arm 48 at a specific position, and the guide roller on the frame is 55 can be maintained running on the centerline of the rope groove.

The support arm 48 supporting the rope guide 43 is always kept under spring force. The connecting spring 47 is fixed to the rotating shaft 49 of the support arm 48 and the connecting bar 46, and another spring arm passes through a hole in the support arm 48 to apply force. The distance between the attached rope guide and the rope drum for a large-capacity rope drum is a little farther than when it is attached to a small-capacity rope drum. However, since the number of support arms 48 to support increases, it is possible to maintain alignment of the central axes.

Because the height and diameter of the drum groove varies depending on the wire rope used, it is difficult to move the guide roller to the axial center of the drum groove, and instead it is possible to move the support arm 48 between the chain links 44. , the position can be adjusted. In order to ensure that the guide roller 51 attached to the support arm 48 always moves along the center of the rope groove, the rotation axis of the support arm 48 is held down by a push spring.

A guide roller 51 is attached to the support arm 48, and the width of the guide roller 51 is based on the small outer diameter rope drum groove. The rope is designed to roll onto the drum groove. Although the height of the groove of a rope drum with a larger diameter is higher, the width of the groove is also larger, so that even if the part where the support arm 48 supports the guide roller 51 intersects when viewed from the side, it actually does not meet the edge of the rope groove. A certain distance remains from the portion supporting the guide roller 51. Therefore, it can be used without hitting the guide roller 51.

FIG. 11 shows the structure of the wire rope floating prevention device 52 of this embodiment. A wire rope flotation prevention device 52 is provided above the rope guide 43, and the distance between the gap between the wire rope flotation prevention device 52 and the wire rope 36 is normally smaller than the depth of the rope drum groove, and the wire rope 36 is placed in the groove. It can be prevented from coming off. Since it performs its function when it comes off from the groove, it usually does not come into direct contact with the wire rope 36, thereby avoiding wear on the wire rope 36. Furthermore, since the installation height of the wire rope floating prevention device 52 can be adjusted within a certain range, the function can be realized even if the diameter of the rope changes.

When this embodiment is applied, even if the number of chain links 44 is increased when attached to the rope drum 37 of the invention whose diameter increases, the chain links 44 will not move in the center line direction because the lower curvature of the links is small. The rope drum 37 can be approached. Therefore, the guide roller 51 supporting the rope guide 43 can align the center axis of the rope guide 43 with the center axis of the rope drum 37 by the force of the spring without being far away from the rope drum 37.

As explained above, the rope guide is a device that matches the diameter of the rope drum, surrounds the rope drum, rotates on the rope drum, and guides the rope as it comes out. In this case, rope guides composed of parts of different sizes are required for rope drums of different diameters. The rope guide body, which is composed of modules with different curvatures on the upper and lower sides, is supported by guide rolls whose supporting height can be adjusted. Therefore, rope guides composed of parts of the same size can be surrounded by rope drums having different diameters, and can guide the wire rope as it comes out.

Therefore, the rope guide main body can be assembled using the same parts depending on rope drums having different diameters. The rope guide can be easily attached, the safety in use can be improved, and the workability of the installation work can be improved. In addition, this example solves the above problem and improves production efficiency by providing a rope guide that is free from dimensional restrictions due to wire rope diameter or drum diameter by using multiple parts of the same size. It becomes possible to do so.

Note that the present invention is not limited to the embodiments described above, and includes various modifications.
The embodiments described above are described in detail to explain the present invention in an easy-to-understand manner, and the present invention is not necessarily limited to those having all the configurations described. For example, in this embodiment, a configuration in which the number of chain links is provided according to the diameter of the rope drum has been described, but the size and shape of other parts may be used as the standard. Furthermore, other dimensions such as radius, aperture, short axis, long axis, etc. may be used.

DESCRIPTION OF SYMBOLS 1... Electric hoisting machine, 2... Electric trolley, 3... Operation input device, 4... Crane hook, 5... Hoisting machine control part, 10... Girder, 11a, 11b... Traveling rail, 12... Saddle control part, 20a, 20b... Crane saddle, 25a, 25b... Drive wheel for traveling, 26a, 26b... Driven wheel, 27... Drum shaft, 26 bearing, 2830... Winding machine frame, 31... Electric motor, 32... Drive shaft, 33... Shaft joint, 34...shaft, 35...brake, 36...wire rope, 37...rope drum, 40...reducer, 41...driven shaft, 42a, 42b...gear, 43...rope guide, 44...chain link, 45...opposite chain link , 46... Connection bar, 47... Connection spring, 48... Support arm, 49... Rotating shaft of support arm, 50... Coupling, 51... Guide roller, 52... Wire rope floating prevention device, 53... Rope guide stopper, 54... Wire rope holding device, 55... Frame guide roller, 56... Pressure spring, 57... Guide roll adjustment plate, 58... Large capacity rope drum

Claims (15)

An electric hoist for moving a load using power, comprising a wire rope that transmits the power, and a rope that is rotatably supported by a shaft and is rotationally driven by a drive device to wind up and unwind the wire rope. In a rope guide device that constitutes an electric hoist equipped with a drum,
installed to surround the rope drum,
controlling the position of the wire rope in winding and unwinding with respect to the rope drum;
consisting of a plurality of chain links connected to each other in a ring, the number of the chain links being in accordance with the diameter of the rope drum,
When the plurality of chain links is an odd number, guide rollers are not provided for two consecutive chain links among the plurality of chain links, and guide rollers are not provided for the other chain links. It is set up so that one will fly ,
When the plurality of chain links is an even number, the plurality of chain links are installed so as to skip one of the chain links on which the guide roller is installed, and one end of the chain link has a square hole and the other chain link has a rectangular hole. The rope is configured to be concave from one section, the other end of the chain link has a circular hole, and the square hole and the circular hole of the chain link adjacent to the chain link are connected by a connecting bar. Guide device. The rope guide device according to claim 1,
A rope guide device characterized in that the number of chain links increases as the diameter of the rope drum increases. The rope guide device according to claim 1 or 2,
A rope guide device characterized in that the outer and inner diameters of the chain links have different numerical values. The rope guide device according to claim 3,
A rope guide device characterized in that the curvature of the outer diameter of the chain link is larger than the curvature of the inner diameter. The rope guide device according to claim 1,
A rope guide device, wherein each of the plurality of chain links has the same dimensions. In electric hoisting machines for moving loads by power,
a wire rope that transmits the power;
a rope drum rotatably supported by a shaft and rotationally driven by a drive device to wind and unwind the wire rope;
having a rope guide installed to surround the rope drum and controlling the position of the wire rope in winding and unwinding with respect to the rope drum;
The rope guide is
consisting of a plurality of chain links connected to each other in a ring, the number of the chain links being in accordance with the diameter of the rope drum,
When the plurality of chain links is an odd number, guide rollers are not provided for two consecutive chain links among the plurality of chain links, and for other chain links, one of the chain links on which the guide roller is installed is not provided. It is set up so that one can fly ,
When the plurality of chain links is an even number , the plurality of chain links are installed so that one of the chain links on which the guide roller is installed is skipped, and one end of the chain link has a square hole and the other part has a rectangular hole. The other end of the chain link has a circular hole, and the square hole and the circular hole of the chain link adjacent to the chain link are connected by a connecting bar. Upper machine. The electric hoist according to claim 6,
The electric hoist is characterized in that the number of chain links in the rope guide increases as the diameter of the rope drum increases. The electric hoisting machine according to claim 6 or 7,
An electric hoist characterized in that numerical values regarding an outer diameter and an inner diameter of the chain link are different from each other. The electric hoisting machine according to claim 8,
An electric hoist characterized in that the curvature of the outer diameter of the chain link is larger than the curvature of the inner diameter. The electric hoist according to claim 6,
An electric hoist, wherein each of the plurality of chain links has the same dimensions. In a crane system that has an electric hoist and a traversing mechanism for moving loads by power,
The electric hoist is
a wire rope that transmits the power;
a rope drum rotatably supported by a shaft and rotationally driven by a drive device to wind and unwind the wire rope;
having a rope guide installed to surround the rope drum and controlling the position of the wire rope in winding and unwinding with respect to the rope drum;
The rope guide is
consisting of a plurality of chain links connected to each other in a ring, the number of the chain links being in accordance with the diameter of the rope drum,
When the plurality of chain links is an odd number, guide rollers are not provided for two consecutive chain links among the plurality of chain links, and guide rollers are not provided for the other chain links. It is set up so that one will fly ,
When the plurality of chain links is an even number, the plurality of chain links are installed so as to skip one of the chain links on which the guide roller is installed, and one end of the chain link has a square hole and the other chain link has a rectangular hole. The other end of the chain link has a circular hole, and the square hole and the circular hole of the chain link adjacent to the chain link are connected by a connecting bar. system. The crane system according to claim 11,
The crane system is characterized in that the number of chain links in the rope guide increases as the diameter of the rope drum increases. The crane system according to claim 11 or 12,
A crane system characterized in that the outer and inner diameters of the chain links have different values. The crane system according to claim 13,
A crane system characterized in that the curvature of the outer diameter of the chain link is greater than the curvature of the inner diameter. The crane system according to claim 11,
A crane system, wherein each of the plurality of chain links has the same dimensions.

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