KR102054177B1 - Gantry crane - Google Patents

Abstract

The present invention provides a gantry crane capable of improving safety by accurately handling high-priced equipment. The gantry crane includes: a support unit comprising column units arranged by being horizontally separated at fixed intervals; a rail unit connecting the upper ends of the column units on both sides; a trolley moving forward and backward in the longitudinal direction of the rail unit; and a hoist raising and lowering an object to be transferred by being installed in the trolley. In order to improve utilization of a gantry crane, specifically of a movable gantry crane, by safely controlling the height of a column unit of a support unit in an electric motion method, the column unit includes: a lift hole formed in the longitudinal direction; a fixed column including an exposed groove formed by opening one side of the lift hole; a lift column ascending and descending by being inserted into the lift hole, wherein the lift column includes a rack gear exposed to the exposed groove and an upper end of the lift column is connected to the rail unit; and a lift motor connected to the fixed column and including a pinion gear engaged with the rack gear.

Description

Gantry Cranes {GANTRY CRANE}

The present invention is provided with a support unit consisting of pillars arranged spaced apart from left and right by a predetermined interval, a rail unit connecting the upper ends of both pillars, a trolley forward and backward in the longitudinal direction of the rail unit, the lifting and lowering of the object to be transported Regarding a gantry crane including a hoist to make, to increase the utilization of the gantry crane, in particular a mobile gantry crane by safely adjusting the height of the column of the support unit by an electric method, the column is a lifting hole formed in the longitudinal direction, and Fixed pillar having an exposed groove formed by opening one side of the elevating hole, the elevating pillar having a rack gear is inserted into the elevating hole to the elevating hole and the rail unit is connected to the upper end, exposed to the exposed groove, the fixed pillar And a lift motor coupled to the rack gear and having a pinion gear meshed with the rack gear. It relates to a gantry crane characterized in that.

In general, production lines such as semiconductors, LCDs, LEDs, solar cells, and secondary batteries are installed in clean rooms requiring strict clean conditions, and such forklifts or crane equipment can be put into these clean rooms. Conventionally, a large size that can be disassembled, dismantled, moved or loaded with equipment in a size that a worker can carry in order to bring in or take out various equipment having a heavy load of about several tons or tens of tons to a clean room. A method of making and moving a cart has been used.

However, the method of disassembling, disassembling, and moving equipment is ineffective because it requires a considerable time for disassembly and reassembly, and the method using a large cart requires separate carts for the size of the object to be transported. It is also ineffective.

For this reason, gantry cranes, in particular mobile gantry cranes, which can replace conventional tower cranes or fixed installation hoist cranes, which are difficult to install in clean rooms, are used.

However, since the overall height of the conventional gantry crane is constant, it is impossible to bring in and take out the gantry train when the height of the entrance is lower than the height in the field.

Since the height of the roof is different depending on the site of the semiconductor factory, there is a problem that can not be limited to the height of the roof.

Therefore, as cranes become larger, it is not practical to manufacture cranes individually to the height of the roof of a semiconductor factory.

There is a crane that can be adjusted in height, such as Patent No. 10-0917962, but because the crane of the registered patent can be adjusted only height manually can only apply the technology of the registered patent to a light weight small crane, In the case of a gantry crane with a very heavy self load, it is impossible to manually adjust the height of the crane, and there is a problem in that the effectiveness of the conventional height adjustment method is limited.

Accordingly, the present invention has been made to solve the above problems,

Freely adjust the overall height of gantry cranes, especially mobile gantry cranes with very heavy loads, to facilitate the loading and unloading of gantry cranes on the site, and to increase the utilization by adjusting the height of the crane to the height of the roof. It is an object of the present invention to provide a gantry crane that can increase safety by accurately handling expensive equipment.

In order to achieve the above object, the gantry crane according to the present invention,

A support unit consisting of pillars arranged at a predetermined interval from side to side, a rail unit connecting upper ends of both pillar portions, a trolley moving forward and backward in the longitudinal direction of the rail unit, and a hoist provided on the trolley to lift and lower the object to be transported; In the included gantry crane,

The pillar portion,

A fixed column having a lifting hole formed in a longitudinal direction and an exposed groove formed by opening one side of the lifting hole;

A lifting and lowering pillar inserted into the lifting hole and connected to the rail unit at an upper end thereof and having a rack gear exposed to the exposed groove;

It is characterized in that it comprises a lifting motor having a pinion gear coupled to the fixed column, and meshed with the rack gear.

And in the gantry crane according to the invention,

The support unit is composed of a pair of pillars respectively placed on both sides of the left and right, characterized in that the fixing column of the column is provided with an optical sensor for detecting the height of the lifting column.

Also in the gantry crane according to the invention,

The lifting motor includes a micro reducer, and the micro reducers of each pillar are synchronously controlled by a variable voltage variable frequency (VVVF) inverter.

Further in the gantry crane according to the invention,

The rack gear and the pinion gear are characterized in that they are engaged in a helical gear type.

The gantry crane according to the present invention,

By freely adjusting the height of the pillars of the support unit, it is possible to customize the installation and export of the gantry cranes according to the roof height of each site.In particular, the height of the pillars can be controlled by the operation of rack gears and pinion gears using lifting motors. It is made automatically by electric method, so you can use the gantry crane which is very heavy with its own height more safely.

By detecting the top and bottom height of the lifting column with an optical sensor, it stops the lifting operation immediately when an overrun of the lifting column occurs, preventing the crane from detaching and overturning.

By synchronously controlling the cyclo reducer with the variable voltage variable frequency inverter of each column, the lifting operation of the lifting post is controlled at low speed, and the lifting height of the lifting post is exactly matched by each post to prevent the crane from tipping over.

The rack gear and pinion gear are meshed by helical gear type, so that the compact structure design of the driving force transmission part is possible, while the gear structure and strength are stronger than the general spur gear type,

The pinion gear connected to the cyclo reducer is supported by the shaft bracket equipped with the bearing, so that despite the heavy loads, the pinion gear shaft can be prevented from being damaged, such as bending of the pinion gear.

By reducing the friction coefficient between the fixed column and the lifting column, the load generated during lifting operation of the lifting column is reduced.

The safety of the entire operation of the gantry crane is very effective.

1 is a front view of a gantry crane according to the present invention.
Figure 2 is a side view of the gantry crane in accordance with the present invention.
3 is a plan view of a gantry crane according to the present invention.
Figure 4 is a side view of the support unit according to the present invention.
5 is a front view and a plan view and a side view of a rail unit according to the present invention.
6 is a front view and a plan view and a controller of the trolley according to the present invention.
7 is a plan view and a side view of a truck according to the present invention.
8 is a plan view of a floor rail according to the present invention.
9 and 9 are photographs of the main part photographed the prototype of the gantry crane according to the invention.

Since the present invention may be modified in various ways and have various forms, embodiments (or embodiments) will be described in detail in the text. However, this is not intended to limit the present invention to the specific form disclosed, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

In each of the drawings, the same reference numerals, in particular, the tens and ones digits, or the same digits, tens, ones, and alphabets refer to members having the same or similar functions, and unless otherwise specified, each member in the figures The member referred to by the reference numeral may be regarded as a member conforming to these criteria.

In addition, in the drawings, the components are exaggerated in size (or thick) in size (or thick) in size (or thin) or simplified in consideration of the convenience of understanding and the like, thereby limiting the scope of protection of the present invention. It should not be.

The terminology used herein is for the purpose of describing particular embodiments (suns and aspects) (or embodiments) only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

 In this application, the terms “comprises” or “consists” are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and are not construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

In the present specification, the first to the second and the second will only refer to different components, and are not limited to the order of manufacture, and their names are used in the detailed description and claims of the present invention. May not match.

In describing the gantry crane according to the present invention, for the sake of convenience, the non-strict approximate direction reference is specified with reference to FIG. In the detailed description and claims of the invention, unless otherwise specified, directions are specified in accordance with this criterion.

Hereinafter, a gantry crane according to the present invention will be described with reference to the accompanying drawings.

The present invention is a support unit (S) consisting of pillars (C) arranged at a predetermined interval from side to side, rail unit 40 for connecting the upper ends of both pillars (C), the longitudinal direction of the rail unit 40 Regarding a gantry crane including a trolley 50 moving forward and backward with the hoist 60 provided in the trolley 50 to move up and down the object to be transported, as shown in FIGS. 1 to 10. (S), the rail unit 40, the trolley 50, the hoist 60, the mobile unit 70, the bottom rail 80 is included.

The support unit (S) is composed of a total of four pillars (C) by a pair of pillars (C) are respectively placed on the left and right sides,

Each pillar part C,

Fixed column 10 having a lifting hole 11 formed in the longitudinal direction, and an exposed groove 12 formed by opening one side of the lifting hole 11,

Lifting column 20 having a rack gear 21 is inserted into the lifting hole 11, the lifting and lowering and the rail unit 40 is connected to the upper end, exposed to the exposed groove 12,

It is coupled to the fixed column 10, and includes a lift motor (hereinafter referred to as the first lift motor 30) having a pinion gear 31 meshed with the rack gear 21.

The fixed column 10 is a rectangular pipe-type member, is fixed to the upper surface of the trolley portion of the mobile unit 70, while the lifting hole 11 is formed to penetrate up and down, the slit shape in the longitudinal direction on one side The exposed groove 12 is opened to the.

The lifting column 20 is a telescopic type that is inserted into the lifting hole 11 in a telescopic type and is lowered to the upper part of the lifting hole 11, and has an exposed groove 12 on one side thereof. The rack gear 21 is inserted into the protruding to the outside is provided in the longitudinal direction, the rail unit 40 is coupled to the upper end of the trolley 50 installed on the rail unit 40, that is, to adjust the overall height of the gantry crane do.

The first lifting motor 30 is to provide the lifting power of the lifting column 20, the upper end of the fixed column 10 is coupled in a direction orthogonal to the fixed column 10, the first lifting motor ( The pinion gear 31 rotated by 30 is engaged with the rack gear 21 to raise and lower the lifting post 20.

In addition, the rack gear 21 and the pinion gear 31 is meshed with a helical gear type.

The rack gear 21 and the pinion gear 31 may be engaged with each other by the general spur gear type, but in this case, since the gear teeth are easily damaged due to the heavy load of the rail unit 40, the rack gear is of the helical gear type. The pinion gear 31 is engaged with the 21 to reinforce the strength of the gear teeth against heavy loads.

According to the present invention, since the pillar portion C having such a structure is installed in four places on both sides of the rail unit 40, the load of the rail unit 40 is distributed and supported, thereby increasing safety.

On the other hand, since the exposed pillar 12 is formed by opening the exposed groove 12 in the longitudinal direction, when the load of the lifting pillar 20 is applied to the outside, sidewalls provided with the exposed groove 12 are opened and rolled over. Safety accidents may occur.

The fixing column 10 includes a binding bracket 13 connecting both ends of the exposed groove 12 while bypassing the rack gear 21 to the outside.

The binding bracket 13 is coupled to the side walls in the form of the 'c' shape to surround the corner portion of the fixing column 10, the both ends of the exposed groove 12 is formed, to prevent the exposure groove 12 is opened, A plurality of binding brackets 13 are provided at predetermined intervals along the longitudinal direction of the fixing column 10.

In addition, since each lifting column 20 is individually operated by each of the first lifting motor 30, in order to prevent departure and overturning accident due to overrun for each lifting column 20, The fixing column 10 is provided with photosensors 14H and 14L for detecting the height of the lifting column 20.

The optical sensors 14H and 14L are coupled to one side of the exposed groove 12 to determine whether the lifting column 20 is overrun depending on whether the rack gear 21 protruding into the exposed groove 12 is detected. do.

The photosensors 14H and 14L are composed of a first photosensor 14H provided at the lower end of the fixing pillar 10 and a second photosensor 14L provided at the upper end of the fixing pillar 10. When the second optical sensor 14L detects the rack gear 21, it determines that the lifting post 20 has reached the lowest point and transmits a stop signal to the first lifting motor 30, and the first optical sensor 14H. If it does not detect the rack gear 21, it is determined that the lifting column 20 has reached the highest point and transmits a stop signal to the first lifting motor 30, thereby preventing the lifting column 20 from falling and overturning accidents. do.

On the other hand, the first lifting motor 30 is the speed reducer 34 in the pinion gear 31 so as to distribute and support the load of the lifting post 20 applied to the pinion gear 31 of the first lifting motor 30. Protruding end (31b) protruding to the opposite side of the shaft portion (31a) connected to, and the projection end (31b) is further supported by a rolling bracket and coupled to the outer surface of the fixed pillar (10).

The shaft bracket 32 has a bearing 33 into which the protruding end 31b is fitted, and a flange 32a connected to an inner end thereof is coupled to an outer surface of the fixing column 10, so that the pinion gear 31 is provided. The pinion gear 31 can be supported by a smooth rotational motion and a strong axial load while preventing damage such as bending.

That is, generally, the shaft of a motor (including a reducer) is supported by one point in a cantilever structure only in the main body of the motor.

The present invention solves the above problems by allowing the shaft portion 31a and the protruding end 31b of the pinion gear 31 to be supported by the reducer 34 and the shaft bracket 32 at two points.

In addition, since the lifting and lowering of the lifting column 20 must be made at a low speed, the first lifting motor 30 includes a cyclo reducer 34.

The cyclo reducer 34 raises and lowers the reduction ratio of the motor to 1000: 1 or more to stably lower and lower the lifting column 20.

Furthermore, since the four lifting posts 20 must be simultaneously raised and lowered to the correct height, the micro reducer 34 of each column C is synchronously controlled by a variable voltage variable frequency (VVVF) inverter. In spite of the fact that each of the first lifting motors 30 is connected to each of the lifting columns 20, all the lifting columns 20 are accurately controlled to prevent the occurrence of safety accidents.

In addition, the fixed column (10) and the lifting column (20) should be interviewed with each other, the lifting and lowering of the lifting column 20 is made stable, in which case the friction between the fixed column (10) and the lifting column (20).

Accordingly, the lifting column 20 includes a friction reducing plate 22 attached to each outer surface to reduce the frictional force with the fixing column 10.

The friction reducing plate 22 applies grease to a plate of a synthetic resin material such as an engineering plastic, thereby eliminating the friction coefficient between the fixed column 10 and the lifting column 20.

Reference numeral 15 is a pedestal for supporting each pillar (C).

Subsequently, the rail unit 40 guides the left and right movement of the trolley 50 to which the hoist 60 is mounted.

Consisting of a pair of support beams 41 respectively connected to the upper end of the front and rear pillars C, a trolley 50 is mounted between the support beams 41 to move.

Both ends of the support beams 41 are coupled to the pillar part C by the connecting bar 43 in the front-rear direction, and the 'H' type first rail 44 is coupled to the upper surface of the support beams 41. It is provided.

The first stopper 45 is provided at both side ends of the first rail 44 to limit the forward and backward positions of the trolley 50.

The trolley 50 moves forward and backward in the longitudinal direction of the rail unit 40, and is provided to move forward and backward on the transport path 42. The trolley 50 is connected to the first rail 44 at an upper end of the front and rear side plates 51. A wheel 52 that is supported and slidingly coupled is provided.

The trolley 50 has a rotation shaft of the first drive motor 53 connected to one wheel 52 connected to each other by the wheel shaft 52a, and in the longitudinal direction of the transport path 42 through the rotation of the wheel 52. Go back and forth.

The hoist 60 is provided on the trolley 50 to elevate the object to be transported, and includes a second lifting motor 61 provided between the side plates 51 of the trolley 50, and the present specification. In the drawings, an annular hoist 60 having a wire 62 wound by the second lifting motor 61 and an annular portion 63 connected to the wire 62 is representatively shown, but the hoist 60 ) The detailed configuration may vary. For example, a bucket type hoist may be provided in the trolley 50.

The trolley 50 and the hoist 60 are controlled by the controller 64, so that the front and rear of the trolley 50 and the lifting and lowering of the ring portion 63 are made.

In addition, the present invention is provided with a pair of trolleys 50 each provided with a hoist 60 in the transport path 42 of the support unit (S) to enable the movement of the two to be transported at the same time.

Meanwhile, the present invention further includes a mobile unit 70 and a bottom rail 80 for installing the gantry crane in a movable type.

The mobile unit 70 is coupled to the upper surface of the bogie (C) has a wheel 71 is exposed to the lower surface, one wheel 71 is rotated by the second drive motor 72 Allow the gantry crane to move back and forth.

In addition, the front and rear of the mobile unit 70 is provided with a buffer louver 73, to cushion the impact with the second stopper 84 to be described later.

The bottom rail 80 is composed of a 'H' type second rail 81 is installed on the floor of the site, the wheel 71 is slidingly coupled to the second rail 81, the second rail 81 The mobile unit 70, ie, the gantry crane, moves forward and backward in the lengthwise direction.

One end of the second rail 81 is fixed to the bottom by a clamp 82 bolted to the bottom, and the second rail 81 is installed to be supported by a fixing plate 83 that supports the other end of the second rail 81. A second stopper 84 is provided to contact the buffer louvers 73 of the mobile unit 70 to limit the forward and backward positions of the mobile unit 70.

In the above description of the present invention with reference to the accompanying drawings gantry cranes described mainly, but the present invention can be various modifications, changes and substitutions by those skilled in the art, such modifications, changes and substitutions belong to the protection scope of the present invention Should be interpreted as

S: support unit C: column
10: fixed column 11: lifting hole
12: exposed groove 13: binding bracket
14H, 14L: Optical sensor 15: Pedestal
20: lifting column 21: rack gear
22: friction reducing plate 30: the first lifting motor
31 pinion gear 32 shaft bracket
33: bearing 40: rail unit
41: support beam 42: transfer path
43: connecting bar 44: first rail
45: first stopper 50: trolley
51: side plate 52: wheel
53: first drive motor 60: hoist
61: first lifting motor 62: wire
63: ring portion 70: mobile unit
71: wheel 72: second drive motor
73: shock absorber 80: floor rail
81: second rail 82: clamp
83: fixing plate 84: second stopper

Claims (4)

Support unit (S) consisting of pillars (C) arranged to be spaced apart from the left and right by a predetermined interval, the rail unit 40 for connecting the upper ends of both pillars (C), the longitudinal direction of the rail unit 40 In the gantry crane including a trolley 50, which is provided in the trolley 50, the hoist 60 for lifting and lowering the conveyed object,
The pillar portion C,
Fixed pillar 10 having a lifting hole 11 formed in the longitudinal direction, and an exposed groove 12 formed in the longitudinal direction by opening one side of the lifting hole 11,
Lifting column 20 having a rack gear 21 is inserted into the lifting hole 11, the lifting and lowering and the rail unit 40 is connected to the upper end, exposed to the exposed groove 12,
It is coupled to the fixed column 10, and includes a lifting motor 30 having a pinion gear 31 meshed with the rack gear 21,
The fixed column (10) gantry crane, characterized in that it comprises a binding bracket (13) for connecting both ends of the exposed groove 12 while bypassing the rack gear (21) to the outside.
The method of claim 1,
The support unit (S) is composed of a pair of pillars (C) are respectively installed on both sides of the left and right, the fixed column 10 of the column (C) detects the height of the lifting column 20, Gantry crane, characterized in that the light sensor 14H (14L) is provided.
The method of claim 2,
The lifting motor (30) includes a micro reducer (34), the gantry crane, characterized in that the micro reducer (34) of each column (C) is synchronously controlled by a variable voltage variable frequency (VVVF) inverter.
The method according to any one of claims 1 to 3,
The gantry crane, characterized in that the rack gear 21 and the pinion gear 31 is meshed in a helical gear type.

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