KR20170090650A - Jib crane improved hoisting hight - Google Patents

Jib crane improved hoisting hight Download PDF

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Publication number
KR20170090650A
KR20170090650A KR1020160011262A KR20160011262A KR20170090650A KR 20170090650 A KR20170090650 A KR 20170090650A KR 1020160011262 A KR1020160011262 A KR 1020160011262A KR 20160011262 A KR20160011262 A KR 20160011262A KR 20170090650 A KR20170090650 A KR 20170090650A
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South Korea
Prior art keywords
wire
jib
support plate
roller
supporting plate
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KR1020160011262A
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Korean (ko)
Inventor
조덕래
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코리아크레인(주)
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Priority to KR1020160011262A priority Critical patent/KR20170090650A/en
Publication of KR20170090650A publication Critical patent/KR20170090650A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/02—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with non-adjustable and non-inclinable jibs mounted solely for slewing movements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C11/00—Trolleys or crabs, e.g. operating above runways
    • B66C11/16—Rope, cable, or chain drives for trolleys; Combinations of such drives with hoisting gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C11/00—Trolleys or crabs, e.g. operating above runways
    • B66C11/16—Rope, cable, or chain drives for trolleys; Combinations of such drives with hoisting gear
    • B66C11/18—Rope, cable, or chain drives for trolleys; Combinations of such drives with hoisting gear comprising endless ropes or cables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/16—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs supported by columns, e.g. towers having their lower end mounted for slewing movements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)

Abstract

BACKGROUND OF THE INVENTION Field of the Invention [0002] The present invention relates to a space saving jib crane, and more particularly, to a space saving jib crane which can be installed in a factory or the like having a low ceiling height to facilitate lifting work.
That is, the present invention has a basic structure of a vertical frame installed on the ground and a jib which is pivotally mounted on the upper end of the vertical frame, so that the rod block and the hook can be lifted up to the inside of the jib, The lifting height of the cargo hooked on the hook can be increased more than that of the conventional jib crane and the lifting work of the cargo can be easily carried out even in a narrow factory having a low ceiling To provide a space saving jib crane capable of allowing a space saving.

Figure P1020160011262

Description

Jib crane improved hoisting hight}

BACKGROUND OF THE INVENTION Field of the Invention [0002] The present invention relates to a space saving jib crane, and more particularly, to a space saving jib crane which can be installed in a factory or the like having a low ceiling height to facilitate lifting work.

In general, in a crane, a jib crane connects a jib extending horizontally to the top of a vertical frame and allows the jib to be pivoted relative to the vertical frame, It refers to a kind of small crane.

1 is a schematic view showing a conventional jib crane.

In Fig. 1, reference numeral 100 denotes a vertical frame, and reference numeral 200 denotes a jib.

One end of the jib 200 is rotatably connected to the upper end of the vertical frame 100 and the trolley unit 300 is installed in the jib 200 so as to be movable in the left and right directions.

A load block 110 is connected to a lower end of the trolley unit 300 and a hook 120 is connected to a lower portion of the load block 110 to hang the load.

The trolley unit 300 is moved in the right and left directions and the left and right cargo is transferred to the hook 120. The jig 200 is rotated about the vertical frame 100 with respect to the vertical frame 100, Depending on the configuration, it is possible to transfer the cargo within the Jib's trajectory.

The vertical height of the jib 200 is set to about 300 mm and the vertical height of the rod block 110 and the hook 120 is set to about 1000 mm so that the height of the jib 200 The height of the rod block 110 and the hook 120 is about 1300 mm.

However, the conventional jib crane has the following problems.

Currently, the main use of jib crane is mainly used in small-sized factories such as general machining companies with lathes and milling machines, heavy load lifter carriers, etc. Since the ceiling height in such a small factory is low, There is a difficulty in securing the installation space of the apparatus.

In addition, even if a jib crane is installed in a narrow factory with a low ceiling, it is difficult to lift a bulky, heavy load, and transfer it to a desired height position.

For example, if the cargo is bulky and heavy, the workpiece must be hooked to the hook and then correctly centered and chucked on the chuck of the shelf (eg, above 1300 mm above the ground) It is impossible to lift the central portion of the work material to a desired height (chuck center position of the shelf) because the upper and lower volumes of the work material are large, and eventually the work material is chucked to the chuck of the shelf There is a problem with difficulty.

Korean Registered Patent Registration No. 10-1511048 (2015.04.06)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a vertical frame which is installed on the ground and a jib which is rotatably mounted on the upper end of the vertical frame, The lifting height of the lifted object hooked on the hook can be further increased as compared with that of the conventional jib crane by constructing the inner and outer portions of the jib so as to be able to move up and down to the maximum extent and to transfer it to the left and right. Saving jib crane capable of easily lifting a cargo in a factory or the like.

According to an aspect of the present invention, there is provided a display device comprising: a vertical frame installed on a ground; A jig having an opening at its bottom and a rail integrally bent at the front and rear sides of the opening, the jib having one end rotatably mounted on an upper end of the vertical frame; A winding drum mounted on one end of the jib and having a wire drum for winding up and unwinding the wire for lifting and lowering and a wire fixing stage for holding the other end of the lifting wire separated from the upper side of the wire drum; A first guide roller and a second guide roller which are mounted on the upper end of the jib and guide the lifting and lowering wire from the wire drum to the trolley unit; A left and right driving device mounted on the lower side of the other end of the jig to wind or unwind the left and right feeding wires; A tilting roller which is mounted on a lower portion of the wire drum and guides the left and right feeding wires from the left and right driving device in a pulling or loosening direction; And is provided with a receiving space for a load block connected to the hook at its bottom portion so as to be movable in the left and right directions on the rail end of the jib, and guides the rising and falling of the hoisting and lowering wire, A trolley device; A hoisting and lowering wire fixed to the wire fixing stage after passing through the trolley unit while passing through the first guide roller and the second guide roller and the other end being connected to the wire drum after winding the wire drum several times, A left and right feeding wire fixed to one side of the trolley unit via one end of the trolley and another end fixed to the other side of the trolley unit after being wrapped around the left and right driving device several times; The present invention provides a space saving jib crane comprising:

According to a preferred embodiment of the present invention, the driving device for left and right conveying comprises: a motor; A reduction gear connected to the output shaft of the motor; A first friction disc and a second friction disc which are provided in a structure in which a plurality of wire insertion grooves are formed along the thickness direction so that the left and right transfer wires are wound several times and are simultaneously engaged with the reduction gear; .

The trolley apparatus according to a preferred embodiment of the present invention comprises: a first support plate and a second support plate which are disposed in the inside of a jig in a back and forth direction; A support shaft connecting the upper end of the first support plate and the upper end of the second support plate together; A third guide roller for guiding the ascending and descending steel wire from the second guide roller toward the roller of the load block and the ascending and descending steel wire from the rollers of the load block are rotatably mounted between the first support plate and the upper end of the second support plate, A fourth guide roller for guiding to the wire fixing end; A right and a left conveying roller which is rotatably mounted on an outer surface of a lower end portion of a first support plate and a rotation support shaft attached to an outer surface of a lower end portion of a second support plate so as to be rotatably mounted on a rail end of the jib; A first roller and a second roller mounted on an inner surface and an inner surface on the other side of the first support plate or the second support plate, respectively, for guiding the left and right feed wires; .

In particular, the first support plate and the second support plate are provided in a reverse "U" shape having a receiving space for a load block connected to the hook.

Preferably, one end of the right and left transporting wires is fixed to one side of the first supporting plate or the second supporting plate via the inclined roller, and the other end is fixed to the other side of the first supporting plate or the second supporting plate .

In addition, the inclination of the inclined roller is set to match the width of each of the friction wheels of the right and left conveying drive devices.

Through the above-mentioned means for solving the problems, the present invention provides the following effects.

First, when lifting the jib crane, it is possible to raise and lower the rod block and the hook to the inside of the jib as much as possible, so that the lifting height of the lifting hook hanged on the hook can be further increased compared with the existing jib crane.

Second, since the lifting height of the hoisting water hung on the hook can be increased compared with that of the existing jib crane, the lifting work of the hoisting water can be carried out more easily even in a narrow factory having a low ceiling.

That is, even if a jib crane is installed in a narrow factory with a low ceiling, it is difficult to transfer a bulky heavy load to a desired height position. However, in the present invention, the load block can be lifted up to the inside of the jib , The lifting height of the lifting material hooked on the hook can be further increased as compared with that of the conventional jib crane, so that the heavy lifting material having a large volume can be lifted smoothly to a desired height position even in a narrow factory having a low ceiling.

1 is a schematic view showing a conventional jib crane,
2 is a front sectional view showing a space saving jib crane according to the present invention,
3 is a plan sectional view showing a space saving jib crane according to the present invention,
FIG. 4 is a cross-sectional view of a device for lifting a space saving jib crane according to the present invention,
5 is a cross-sectional view of a driving device for a left-right movement of a space saving jib crane according to the present invention,
6 is a sectional view showing a trolley apparatus of a space saving jib crane according to the present invention,
FIG. 7 is an operation diagram showing a lifting operation of a space saving jib crane according to the present invention,
Fig. 8 is an operational view showing a left-right cargo transfer operation of a space-saving jib crane according to the present invention;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a front sectional view showing a space saving jib crane according to the present invention, FIG. 3 is a plan sectional view showing a space saving jib crane according to the present invention, and FIGS. 4 and 5 are cross- Sectional view showing a hoisting device for the economical jib crane and a drive device for the left-right movement.

2 and 3, the space saving jib crane of the present invention includes a vertical frame 100 installed on the ground, a horizontal jib (not shown) mounted on the upper end of the vertical frame to be rotatable within a predetermined locus, And a trolley unit 300 mounted in the jib 200 so as to be capable of being moved laterally along the longitudinal direction of the trolley unit 300. The trolley unit 300 is provided at its lower end with a load block 110 The hook 120 is connected.

The jib 200 is provided with an opening 202 formed at the bottom thereof and a rail end 204 integrally bent at the front and rear sides of the opening 202.

A winding device 210 for winding up and unloading the uphill / downhill wire 211 is mounted on one end of the jib 200 provided at the other end of the jib 200, and a left- And a trolley unit 300 for moving the load block 110 and the hook 120 to the left and right is installed in a jib section between the hoisting unit 210 and the left and right conveying drive unit 220. [

The lifting device 210 includes a wire drum 212 around which a wire 211 for ascending and descending is wound several times so as to wind up or unwind the uphill steel wire 211, A wire fixing end 213 to which the other end of the ascending / descending wire 211 is fixed is spaced apart.

5, at the upper end of the jib 200, that is, at a position above the inside of the inside where the driving device 220 for moving left and right is installed, a wire (not shown) The first guide roller 214 and the second guide roller 215 for guiding the first guide roller 211 to the trolley unit 300 are mounted.

The hoisting and lowering wire 211 is wound on the wire drum 212 of the hoisting device 210 several times and then one end is connected to the wire drum 212 and the other end is connected to the first guide roller 214 and Passes through the second guide roller 215, passes through the trolley unit 300, and is then fixed to the wire fixing end 213.

5, the left and right driving device 220 mounted in the other end of the jib 200 includes a motor 223, a reduction gear 224 connected to the output shaft of the motor 223, A first friction wheel 226 and a second friction wheel 226 which are provided in a structure in which a plurality of wire insertion grooves 225 are formed along the thickness direction so that the left and right transfer wires 221 are wound several times and are simultaneously engaged with the reduction gear 224, And a car 227.

2 to 4, the left and right feeding wires 221 from the left and right feeding drive unit 220 are pulled or pulled in the lower direction of the wire drum 212 of the hoisting device 210 A guiding tilting roller 222 is mounted.

The left and right conveying wires 221 are wound on the respective friction wheels 226 and 227 of the left and right conveying drive device 220 at the same time and then one end of the left and right conveying wires 221 is wound on one side of the trolley unit 300 And the other end is fixed directly to the other side of the trolley unit 300. [

More specifically, one end of the left and right conveying wire 221 is fixed to one side of the first supporting plate 310 or the second supporting plate 320 via the inclined roller 222, Is directly fixed to the other side of the first support plate (310) or the second support plate (320).

At this time, in order to prevent the left and right conveying wire 221 passing through the inclining roller 222 from being separated, the inclining roller 222 is inclined at a predetermined angle. For this purpose, the inclination of the inclining roller 222 227 of the driving device 220. The width of each of the friction wheels 226,

Hereinafter, the configuration of the trolley apparatus 300 will be described.

6 is a cross-sectional view illustrating a trolley apparatus of a space saving jib crane according to the present invention.

The trolley apparatus 300 is mounted on the rail 204 of the jib 200 so as to be transported to the left and right and has a receiving space for the load block 110 connected to the hook 120 at the bottom, Downward movement of the wire 211 and guide the left-right transferring of the left-right transferring wire 221.

The first support plate 310 and the second support plate 320 are spaced apart from each other in the back and forth direction and the first support plate 310 and the second support plate 320 are disposed in the jig 200, The support shaft 330 is connected between the upper ends of the second support plate 320 so that the first support plate 310 and the second support plate 320 are integrated.

As another configuration of the trolley apparatus 300, a means for guiding the vertical lift wire is mounted.

That is, the means for guiding the lifting wire mounted in the trolley unit 300 is rotatably mounted between the upper end of the first supporting plate 310 and the upper end of the second supporting plate 320, and the second guiding roller 215 A third guide roller 340 for guiding the ascending and descending steel wire 211 from the rollers of the load block 110 to the roller side of the rod block 110 and the ascending and descending steel wire 211 from the rollers of the load block 110, And a fourth guide roller 350 for guiding the second guide roller 350 toward the second guide roller 350. [

As another configuration of the trolley apparatus 300, a left-right transfer wire 221 is wound on the inner surface and the inner surface on the other side of the first support plate 310 or the second support plate 320 to guide the left- The first roller 380 and the second roller 390 are mounted on the first roller 380 and the second roller 390. The first roller 380 and the second roller 390 are mounted on the left and right transferring wires 221 before passing through the tilting roller 222 It acts as a guide to the middle part.

As another constitution of the trolley apparatus 300, means for moving the trolley apparatus to the left and right are mounted.

That is, the left and right conveying rollers 370 are mounted on the rotation support shaft 360 attached to the outer surface of the lower end of the first support plate 310 and the outer surface of the lower end of the second support plate 320 through bearings, (370) is mounted on the rail (204) of the jib (200) so as to be movable in the left and right directions.

The left and right conveying rollers 370 roll toward the left or right along the rail ends 204 of the jib 200 by the pulling and unwinding action of the left and right conveying wires 221, The load block 110 and the hook 120 connected to the trolley unit are conveyed to the left and right, and at the same time, the left and right cargo hooked to the hook 120 is conveyed.

The first supporting plate 310 and the second supporting plate 320 of the trolley unit 300 are formed in a reverse U shape so as to have a receiving space 315 of the load block 110 connected to the hook 120 do.

More specifically, when the hook 120 and the load block 110 are lifted and lifted, in order to receive the load block 110 and to secure a maximum lifting height of the lifted load, The second support plate 310 and the second support plate 320 are provided in a reverse "U" shape having a receiving space 315 such that the rod block 110 is inserted and accommodated.

Hereinafter, the operation of the space saving jib crane of the present invention will be described.

Lifting and lowering operation flow

7 is an operation diagram illustrating a lifting operation of a space saving jib crane according to the present invention.

The wire drum 212 of the winding device 210 is rotated in the winding direction by winding the hoisting water on the hook 120 and then driving the winding device 210 in the winding direction so that the hoisting and falling wire 211 is wound .

At this time, one end of the ascending / descending wire 211 is connected and fixed to the wire drum 212, the other end is fixed to the wire fixing end 213, and the ascending and descending wire 211 between one end and the other end The first guide roller 214 and the second guide roller 215 mounted in the other end of the jib 200 and the third guide roller 340 in the trolley unit 300 and the load block 110 And the fourth guide roller 350, as shown in Fig.

More specifically, one end of the ascending / descending wire 211 is fixed to the wire drum 214 and the other end is extended from the wire drum 214 to form a first guide roller 214 and a second guide roller 214 The third guide roller 340 and the rollers of the road block 110 and the fourth guide roller 350 are sequentially passed through the trolley unit 300 and then the wire fixing unit 213 is passed through the wire fixing unit 213, Respectively.

Therefore, when the wire drum 212 of the lifting device 210 is rotated in the winding direction, the lifting and lowering wire 211 is pulled, and the pulling force at this time pulls the third guide roller 340 And the fourth guide roller 350 are moved up and down.

Of course, when the load block 110 is lifted or lowered, the hook 120 for lifting the load from the lower portion of the road block 110 also ascends and descends.

7, when the hook 120 and the rod block 110 are lifted up, the left and right length portions (diametrical directions) of the rod block 110 are separated from the first support plate 310 and the second support plate 310, The front and rear width portions (in the thickness direction) of the rod block 110 are inserted into the accommodation space 315 in the inverted U shape of the support plate 320, Is inserted into the front and rear spacing space between the support plates (320).

As a result, as the load block 110 is inserted into the receiving space of each supporting plate 310 of the trolley unit 300, the lifting height of the lifting hook hanged on the hook 120 can be increased compared to the existing crane.

Thus, the load block 110 can be lifted up to the inside of the jib 200 when lifting the jib crane according to the present invention, It can be increased more than that of the crane, so that the lifting work of the cargo can be carried out more easily even in a narrow factory having a low ceiling.

On the other hand, the descending operation of the pick-up device reversely drives the wire drum of the hoisting device, and the same operation is carried out in the same manner as the ascending / descending operation.

Movement flow of reciprocating water

FIG. 8 is an operation diagram illustrating a reciprocating water transfer operation of the space saving jib crane according to the present invention.

After the lifting operation of the lifting body as described above, the lifting body can be moved right and left along the longitudinal direction of the jib 200, and the left and right feeding of the lifting body can be performed by the right and left feeding wires 221.

One end of the left and right conveying wire 221 is fixed to one side of the first supporting plate 310 or the second supporting plate 320 via the inclined roller 222 and the other end is fixed to the first supporting plate 310 or the second supporting plate 320 2 support plate 320. [0051] As shown in FIG.

One end of the left and right conveying wire 221 is connected to the inner surface of one side of the first support plate 310 or the second support plate 320 and the other end of the first roller 320 mounted on the inner side of the other side of the first support plate 310 or the second support plate 320, (380) and the second roller (390).

A pair of reduction gears 224 connected to the output shaft of the motor 223 decelerates and outputs the rotation of the motor 223 when the motor 223 of the left and right conveying drive unit 220 is driven in the forward direction or the reverse direction, Deceleration output while rotating in the same direction.

Subsequently, the first friction wheel 226 and the second friction wheel 227 engaged with the respective reduction gears 224 rotate together in the forward direction or the reverse direction.

If the first friction disc 226 and the second friction disc 227 rotate together in the positive direction, the other end of the left and right transferring wire 221 (the first supporting plate 310 or the second supporting plate 320) And is fixed to one side of the first supporting plate 310 or the second supporting plate 320 via one end of the left and right feeding wires 221 (via the inclined roller 222) State) is released.

The first support plate 310 or the second support plate 320 connected to the other end of the left and right feed wires 221 is pulled in the right direction as the other end of the left and right feed wires 221 is pulled The left and right conveying rollers 370 attached to the outer surface of the lower end portion of the first support plate 310 and the outer surface of the lower end portion of the second support plate 320 are caused to perform rolling motion along the right direction on the rail end 204 of the jib 200 do.

When the first friction disc 226 and the second friction disc 227 are rotated together in the reverse direction, the other end of the left and right conveying wire 221 (the first supporting plate 310 or the second supporting plate 320) And the other end of the wire 221 is fixed to one side of the first support plate 310 or the second support plate 320 via the inclined roller 222 State) is pulled.

The first supporting plate 310 or the second supporting plate 320 connected to the other end of the left and right feeding wires 221 is pulled in the left direction as the one end of the left and right feeding wires 221 is pulled The left and right conveying rollers 370 attached to the outer surface of the lower end portion of the first support plate 310 and the outer surface of the lower end portion of the second support plate 320 also roll in the left direction on the rail end 204 of the jib 200 do.

The left and right conveying rollers 370 roll toward the left or right along the rail ends 204 of the jib 200 by the pulling and unwinding action of the left and right conveying wires 221, The load block 110 and the hook 120 connected to the trolley unit are conveyed to the left and right, and at the same time, the left and right cargo hooked to the hook 120 is conveyed.

As can be seen from the above, by lifting the rod block up to the inside of the jib as much as possible, the lifting height of the lifting hook hooked on the hook can be increased more than that of existing jib crane, So that it is possible to lift the bulky and heavy bulky cargo to a desired height position even in a narrow factory having a low ceiling.

Meanwhile, the vertical frame 100 of the present invention may be made of FCD cast iron. This FCD cast iron is heated to 1600 to 1650 ° C to be molten, then subjected to a desulfurization treatment, to a spheroidizing treatment agent containing about 0.3 to 0.7% by weight of magnesium, to a spheroidizing treatment at 1500 to 1550 ° C, and then to heat treatment.

Since FCD cast iron is a cast iron in which graphite is spherically crystallized during the solidification process by adding magnesium or the like to the molten metal of general gray cast iron, the shape of graphite is spherical compared to gray cast iron. Since the FCD cast iron has less notch effect, stress concentration phenomenon is reduced, and strength and toughness are greatly improved.

In the vertical frame 100 of the present invention, the FCD cast iron is heated to 1600 to 1650 캜 to be molten, then subjected to a desulfurization treatment, and a spheroidization treatment agent containing about 0.3 to 0.7% by weight of magnesium is put into a vertical frame 100, Followed by heat treatment.

Here, if the FCD cast iron is heated to less than 1600 DEG C, the entire structure can not be sufficiently melted, and if it is heated above 1650 DEG C, unnecessary energy is wasted. Therefore, it is preferable to heat the FCD cast iron to 1600 to 1650 캜.

If the amount of magnesium is less than 0.3% by weight, the effect of injecting the spheroidizing agent is negligible. If the amount of magnesium is more than 0.7% by weight, the effect of injecting spheroidizing agent There is a problem that an expensive material cost is increased while not greatly improving. Therefore, the mixing ratio of magnesium in the spheroidizing agent is preferably about 0.3 to 0.7% by weight.

When the spheroidizing treatment agent is injected into the molten FCD cast iron, it is subjected to spheroidizing treatment at 1500~1550 ° C. If the spheroidizing treatment temperature is lower than 1500 ° C., the spheroidizing treatment is not properly performed. If the spheroidizing treatment temperature is higher than 1550 ° C., the spheroidizing treatment effect is not greatly improved, but unnecessary energy is wasted. Therefore, the spheroidization treatment temperature is preferably 1500 to 1550 ° C.

Since the vertical frame 100 of the present invention is made of the FCD cast iron, the stress concentration phenomenon is reduced because the notch effect is small, and the strength and toughness are greatly improved.

Further, on the outer surface of the case of the motor 223, a discoloring portion whose color changes according to the temperature can be applied. The discoloring portion is applied to the outer surface of the case of the motor 223 by separating two or more temperature-coloring materials whose color changes when the temperature is equal to or higher than a predetermined temperature, into two or more intervals according to the temperature change, And a protective film layer is applied on the discolored portion to prevent the discolored portion from being damaged.

Here, the discoloring portion may be formed by applying a temperature discoloring material having a discoloration temperature of not less than 40 DEG C and not less than 60 DEG C, respectively. The discoloring portion is for detecting a temperature change of the paint due to a change in color depending on the temperature of the case of the motor 223.

The discoloring portion may be formed by applying a temperature discoloring substance whose color changes when the temperature is equal to or higher than a predetermined temperature, to the surface of the case of the motor 223. In addition, the temperature discoloring substance is generally composed of a microcapsule structure having a size of 1 to 10 탆, and the microcapsules can exhibit a colored and transparent color due to the bonding and separation phenomenon depending on the temperature of the electron donor and the electron acceptor.

In addition, the temperature-changing materials can change color quickly and have various coloring temperatures such as 40 ° C, 60 ° C, 70 ° C, and 80 ° C, and such coloring temperature can be easily adjusted by various methods. Such a temperature-coloring material may be various kinds of temperature-coloring materials based on principles such as molecular rearrangement of an organic compound and spatial rearrangement of an atomic group.

For this purpose, it is preferable that the discoloring unit is formed so as to be divided into two or more sections according to the temperature change by applying two or more temperature-coloring materials having different discoloration temperatures. The temperature-coloring layer preferably uses a temperature-coloring material having a relatively low temperature of the discoloration temperature and a temperature-discoloring material having a relatively high discoloration temperature, more preferably a discoloration temperature of not lower than 40 ° C and not lower than 60 ° C A color change portion can be formed by using a temperature coloring material.

Accordingly, the change in the temperature of the casing of the motor 223 can be checked step by step, thereby detecting the change in the temperature of the paint. Accordingly, the motor 223 can be operated optimally, It is possible to prevent damage to the surface of the film.

In addition, the protective film layer is coated on the discolored portion, thereby preventing the discolored portion from being damaged due to external impact, easily recognizing discoloration of the discolored portion, and considering the weakness of the temperature discolored material, Is preferably used.

The polypropylene resin composition having excellent impact resistance against external impact or external environment may be coated on the periphery of the jig 200. The polypropylene resin composition comprises a polypropylene random block copolymer composed of 75 to 95% by weight of an ethylene-propylene-alphaolefin random copolymer and 5 to 25% by weight of an ethylene-propylene block copolymer having an ethylene content of 20 to 50% by weight .

The polypropylene random block copolymer is preferably 75 to 95% by weight of the ethylene-propylene-alphaolefin random copolymer and 5 to 25% by weight of the ethylene-propylene block copolymer. The ethylene- When the content of the ethylene-propylene block copolymer is less than 5% by weight, the impact resistance is deteriorated. When the content of the ethylene-propylene block copolymer is more than 25% by weight, the rigidity is deteriorated do.

Wherein the ethylene-propylene-alpha olefin random copolymer comprises 0.5 to 7% by weight of ethylene and 1 to 15% by weight of an alpha-olefin having 4 to 5 carbon atoms and improves mechanical stiffness and heat resistance of the polypropylene resin composition, As shown in Fig. The ethylene content is preferably from 0.5 to 5% by weight, more preferably from 1 to 3% by weight. When the content of ethylene is less than 0.5% by weight, the whitening resistance is deteriorated. When the content is more than 7% by weight, .

Further, the alpha olefin means any alpha olefin except ethylene and propylene, and is preferably butene. When the number of carbon atoms is less than 4 or more than 5, the reactivity of the alpha-olefin with the comonomer is low during the production of the random copolymer, making it difficult to produce the copolymer. Further, it may contain 1 to 15% by weight, preferably 1 to 10% by weight, and more preferably 3 to 9% by weight of the above-mentioned alpha olefin. If the amount of the alpha-olefin is less than 1% by weight, the crystallinity becomes higher than necessary and the transparency is lowered. When the amount of the alpha-olefin is more than 15% by weight, the crystallinity and rigidity are lowered and the heat resistance is significantly lowered. In addition, the ethylene-propylene block copolymer contains 20 to 50% by weight of ethylene and imparts impact resistance to the polypropylene resin composition and enables finely dispersing, thereby imparting both whitening resistance and transparency. The ethylene content may preferably be 20 to 40% by weight, and if it is less than 20% by weight, the impact resistance is deteriorated. If it exceeds 50% by weight, the impact resistance and whitening resistance may be deteriorated.

Since the polypropylene resin composition is coated on the periphery of the jig 200 as described above, the impact resistance against external impact or external environment can be improved.

Further, a sound-absorbing layer may be applied to the inner side of the jig 200. The nonwoven fabric constituting the sound-absorbing layer may be a needle punch nonwoven fabric. The types of the fibers constituting the sound-absorbing layer made of the needle punch nonwoven fabric include polyester fibers, nylon fibers, polypropylene fibers, acrylic fibers, and natural fibers.

The thickness of the sound-absorbing layer is preferably 0.3 to 15 mm. If the thickness of the sound-absorbing layer is less than 0.3 mm, a sufficient sound absorption effect can not be obtained. If the thickness is more than 15 mm, the internal space of the jib 200 is reduced, not.

The unit weight of the sound-absorbing layer is preferably 10 to 1000 g / m 2 . If it is less than 10 g / m 2 , a sufficient sound absorption effect can not be obtained, and if it exceeds 1000 g / m 2 , the lightness of the jib 200 can not be secured.

The fineness of the fibers constituting the sound-absorbing layer is preferably in the range of 0.1 to 30 decitex. If it is less than 0.1 decitex, absorption of low-frequency noise is difficult and cushioning property is lowered, which is not preferable. Further, if it exceeds 30 decitex, it is not preferable to absorb high frequency noise. Among these, the fineness of the fibers constituting the sound-absorbing layer is more preferably in the range of 0.1 to 15 decitex.

Since the sound-absorbing layer is provided inside the jib 200, it is possible to reduce noise during operation of the trolley 300.

100: vertical frame
110: Roadblock
120: Hook
200: Jive
202:
204:
210: lifting device
211: Welding wire
212: wire drum
213:
214: first guide roller
215: second guide roller
220: Driving device for right and left movement
221: Left and right feed wire
222: inclined roller
223: Motor
224: Reduction gear
225: wire insertion groove
226: 1st friction wheel
227: 2nd friction wheel
300: trolley device
310: first support plate
315: Acceptance space of the roadblock
320: second support plate
330: Support shaft
340: third guide roller
350: fourth guide roller
360:
370: left and right feed rollers
380: Left and right feed wire inner first roller
390: Left and right feed wire inner second roller

Claims (6)

A vertical frame 100 installed on the ground;
A jig 200 having an opening portion 202 formed at the bottom portion and a rail portion 204 integrally bent at the front and rear sides of the opening portion and having one end rotatably mounted on the upper end of the vertical frame 100, ;
A wire drum 212 mounted on one end of the jib 200 to wind up and unwind the wire 211 for ascending and descending and a wire drum 212 mounted on the upper end of the wire drum 212, A lifting device 210 having a fixed wire fixing end 213;
A first guide roller 214 and a second guide roller 215 which are mounted above the other end of the jib 200 to guide the ascending and descending steel wire 211 from the wire drum 212 toward the trolley 300, );
A driving device 220 mounted on the lower side of the other end of the jib 200 to wind or unwind the left and right feeding wires 221;
A tilting roller 222 mounted on the lower portion of the wire drum 212 to guide the left and right feeding wires 221 from the left and right driving device 220 in the pulling or unwinding direction;
And is provided with a receiving space of the load block 110 connected to the hook 120 at the bottom so as to be transported to the rail end 204 of the jib 200 so as to be horizontally conveyed, A trolley unit 300 for guiding the downward movement and guiding the lateral transfer of the left and right transfer wires 221;
The wire drum 212 is wound around the wire drum 212. One end of the wire drum 212 is connected to the wire drum 212 and the other end of the wire drum 212 passes through the first guide roller 214 and the second guide roller 215, A wire 211 for lifting and lowering the wire 211 fixed to the wire fixing end 213 after passing through the wire fixing end 213; And
The other end is fixed directly to the other side of the trolley unit 300. The other end of the trolley unit 300 is fixed to the other side of the trolley unit 300, A left-right transferring wire 221;
Wherein the jib cranes are spaced apart from each other.
The method according to claim 1,
The left and right conveying drive unit 220 includes:
A motor 223;
A reduction gear 224 connected to the output shaft of the motor 223;
A first friction wheel 226 and a second friction wheel 227 which are provided in a structure in which a plurality of wire insertion grooves 225 are formed along the thickness direction so that the left and right transfer wires 221 are wound several times, );
And a space-saving jib crane.
The method according to claim 1,
The trolley apparatus 300 includes:
A first support plate 310 and a second support plate 320 disposed in the jib 200 in the forward and backward directions;
A support shaft 330 connecting the upper ends of the first support plate 310 and the second support plate 320 together;
The first supporting plate 310 and the second supporting plate 320 are rotatably mounted between the upper ends of the first supporting plate 310 and the second supporting plate 320 to guide the ascending / descending wire 211 from the second guide roller 215 toward the roller of the rod block 110 A fourth guide roller 350 for guiding the ascending and descending steel wire 211 from the rollers of the third guide roller 340 and the rod block 110 toward the wire fixing end 213;
And is rotatably mounted on a rotary support shaft 360 attached to the outer surface of the lower end of the first support plate 310 and the outer surface of the lower end of the second support plate 320 via bearings, A left and right conveying roller 370 which is mounted so as to be horizontally conveyable;
A first roller 380 and a second roller 390 mounted on the inner surface and the inner surface of the other side of the first support plate 310 or the second support plate 320 to guide the left and right conveying wires;
And a space-saving jib crane.
The method of claim 3,
The first support plate 310 and the second support plate 320 are provided in a reverse U shape having an accommodation space 315 of the load block 110 connected to the hook 120. [ crane.
The method of claim 3,
One end of the left and right conveying wire 221 is fixed to one side of the first supporting plate 310 or the second supporting plate 320 via the inclined roller 222 and the other end is fixed to the first supporting plate 310 or the second supporting plate 320 2 supporting plate (320) is fixed directly to the other side of the support plate (320).
The method according to claim 1,
Wherein a slope of the slope roller (222) is set to fit the width of each of the friction wheels (226, 227) of the left and right conveying drive unit (220).
KR1020160011262A 2016-01-29 2016-01-29 Jib crane improved hoisting hight KR20170090650A (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109896435A (en) * 2019-03-12 2019-06-18 安徽大洋机械制造有限公司 The column cantilever crane of floor panel and skeleton carrying system afterwards
KR102022034B1 (en) 2019-05-27 2019-09-17 김향숙 Jib crane located on work house
KR102441614B1 (en) * 2022-06-15 2022-09-06 문승욱 System for conveying metal sheet

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109896435A (en) * 2019-03-12 2019-06-18 安徽大洋机械制造有限公司 The column cantilever crane of floor panel and skeleton carrying system afterwards
KR102022034B1 (en) 2019-05-27 2019-09-17 김향숙 Jib crane located on work house
KR102441614B1 (en) * 2022-06-15 2022-09-06 문승욱 System for conveying metal sheet

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