JP2012116591A - Rope-trolley type unloader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a constitution of a rope-trolley type unloader using a rope-trolley system and facilitate maintenance of the rope-trolley type unloader.SOLUTION: The rope-trolley type unloader has: a first hoisting rope 19 which is let out of a first hoisting drum 16 arranged on a girder 5 and which is fixed to a grab bucket 53 while interposing a first sheave 20, that is arranged on a trolley 7, between them; a second hoisting rope 21 which is let out of a second hoisting drum 17 arranged on the girder 5 and which is fixed to the grab bucket 53 while interposing a tip sheave 22, that is arranged at the tip of a boom 6, and a second sheave 23, that is arranged on the trolley 7, between them; a hook block 25 to which both ends of a driving rope 24 trained about both of a lower movable sheave 60 and an upper fixed sheave 61, both of which are arranged on the grab bucket 53, are fixed; and an opening/closing rope 26 which is let out of an opening/closing drum 18 arranged on the girder 5, which is trained about an intermediate sheave 28 arranged on the hook block 25 while interposing a third sheave 27, that is arranged on the trolley 7, between them and which is fixed to the tip of the boom 6 while interposing a fourth sheave 27', that has the same shaft as that of the third sheave 27, between them.

Description

  The present invention relates to a rope trolley type unloader.

  Conventionally, a bridge-type crane-type unloader has been provided on the quay to unload roses such as ore and coal loaded on a bulk carrier. The bridge-type crane type unloader has a machine body that has a front leg on the sea side and a rear leg on the land side and travels along the quay, and a boom that extends from the land girder on the upper part of the machine body to the sea side. And a trolley that traverses along the longitudinal direction of the boom and girder, and a grab bucket that is suspended from the trolley so as to be lifted and lowered and opened and closed. Then, the grab bucket opened by the trolley located on the sea side of the boom is suspended and placed on the rose in the rose carrier, and the grab bucket is gripped by closing the grab bucket. Next, the grab bucket is moved to the land side by traversing the trolley to the land side, and when the grab bucket comes on the hopper provided in the machine body, the loose object is thrown into the hopper. ing. The bulk material thrown into the hopper is supplied to the land conveyor by the conveyor provided in the machine body.

  As a conventional bridge crane type unloader, a trolley is provided on the boom, and the trolley includes a hoisting device for raising and lowering the grab bucket, an opening and closing device for opening and closing the grab bucket, and a traversing device. Has been commonly used.

  However, in the above-described club trolley type unloader, since the hoisting device, the opening / closing device, and the traversing device are mounted on the main trolley, the weight of the trolley increases and the load that moves on the boom increases. There is a problem that the weight of the main body is increased, and the energy consumption required for starting and stopping the trolley is increased.

  For this reason, a rope trolley type unloader has been implemented in which the hoisting drum and the opening / closing drum of the grab bucket are provided on the girder side of the machine body so as to reduce the weight of the trolley and simplify the configuration of the trolley (for example, patents). Reference 1 etc.).

  FIG. 5 is a perspective view showing an outline of the rope trolley type unloader disclosed in Patent Document 1. FIG. 5 shows a total of two hoisting drums 50, 50 ′ and two open / close drums 51, 51 ′. A case of a four-drum unloader having four drums is shown.

  In FIG. 5, reference numeral 52 denotes a trolley capable of traversing in the direction of arrow A along a boom and a girder protruding from the machine main body (not shown) to the sea side, and the grab bucket 53 is suspended by the trolley 52. That is, the hoisting rope 54 fed out from the hoisting drum 50 is guided to the sheave 56 on the trolley 52 through the sheave 55 provided at the land side end portion of the girder, and then directed downward, and the lower end thereof is the grab bucket 53. It is fixed to one side (land side). Further, the hoisting rope 54 ′ fed out from the hoisting drum 50 ′ is guided to the sheave 56 ′ on the trolley 52 through the sheave 55 ′ provided at the sea end of the boom, and then has a lower end directed downward. It is fixed to the other side (sea side) of the grab bucket 53.

  The open / close rope 57 fed out from the open / close drum 51 is guided to a sheave 59 on the trolley 52 through a sheave 58 provided on the land side end of the girder, and then guided downward to a bucket body 53a of the grab bucket 53. , 53a and a lower moving sheave 60 attached to the connecting portion of the upper and lower fixed sheaves 61 (see FIG. 1) attached to the upper frame 53c that supports the bucket body 53a by pin connection via a tie rod 53b. After turning, the grab bucket 53 is fixed to a required location. On the other hand, the open / close rope 57 ′ fed out from the open / close drum 51 ′ is guided to the sheave 59 ′ on the trolley 52 through the sheave 58 ′ provided at the sea side end of the boom, and then guided downward to the grab bucket 53. After being hung a plurality of times between the lower moving sheave 60 and the upper fixed sheave 61 (see FIG. 1), the grab bucket 53 is fixed to a required position.

  In the four-drum unloader shown in FIG. 5, when the open / close ropes 57 and 57 ′ are simultaneously fed out by the open / close drums 51 and 51 ′ while the hoisting drums 50 and 50 ′ are stopped, the lower moving sheave of the grab bucket 53 is obtained. 60 and the upper fixed sheave 61 are opened, the grab bucket 53 is opened, and when the opening and closing ropes 57 and 57 ′ are simultaneously wound by the opening and closing drums 51 and 51 ′, the distance between the lower moving sheave 60 and the upper fixed sheave 61 is reduced. The grab bucket 53 is closed.

  Further, when the operation of feeding the hoisting ropes 54, 54 'by the hoisting drums 50, 50' and the operation of feeding the opening / closing ropes 57, 57 'by the opening / closing drums 51, 51' are simultaneously performed, the grab bucket 53 descends. Further, when the operation of winding the hoisting ropes 54, 54 'by the hoisting drums 50, 50' and the operation of winding the opening / closing ropes 57, 57 'by the opening / closing drums 51, 51' are performed simultaneously, the grab bucket 53 rises. To do.

  On the other hand, a winding operation of the hoisting drum 50 and the opening / closing drum 51 leading the hoisting rope 54 and the opening / closing ropes 57, 57 ′ from the land-side sheaves 55, 58 to the land-side sheaves 56, 59 on the trolley 52; The take-up drum 50 ′ and the open / close drum 51 ′ leading the winding rope 54 ′ and the open / close ropes 57, 57 ′ from the sea-side sheaves 55 ′, 58 ′ to the sea-side sheaves 56 ′, 59 ′ of the trolley 52 If operation is performed simultaneously, the trolley 52 and the grab bucket 53 will cross to the land side. On the contrary, if the winding operation of the hoisting drum 50 and the opening / closing drum 51 and the winding operation of the hoisting drum 50 ′ and the opening / closing drum 51 ′ are performed simultaneously, the trolley 52 and the grab bucket 53 traverse to the sea side. That is, the trolley 52 and the grab bucket 53 can be traversed by operating the hoisting drums 50, 50 ′ and the open / close drums 51, 51 ′.

  In the four-drum unloader shown in FIG. 5, the ropes 57 and 57 ′ are used to open and close the bucket body 53a by being hung between the lower moving sheave 60 and the upper fixed sheave 61 provided in the grab bucket 53. In particular, there is a problem that a very large load is applied when gripping a loose article, and the rope at the above-mentioned hanging portion is worn out. Therefore, the hanging portion is used as an intermediate rope 62, 62 'from the opening and closing ropes 57, 57'. Rope joints 63 and 64 that can be separated and replaced are provided.

WO98 / 06657 Publication

  However, the following problems also occur in the above-described 4-drum unloader.

  That is, the four-drum type unloader requires four drums 50, 50 ′, 51, 51 ′, which complicates the configuration of the apparatus. Further, the raising / lowering operation of the grab bucket 53 and the grab bucket are problematic. As described above, the opening / closing operation of 53 requires that the four drums 50, 50 ′, 51, 51 ′ be operated in synchronism, which makes it difficult to control.

  In the four-drum unloader, the rope joint that can be separated from the open / close ropes 57 and 57 ′ as intermediate ropes 62 and 62 ′ at the places where the lower moving sheave 60 and the upper fixed sheave 61 are hung. 63, 64, it is possible to cope with the damage of the hung portion by simply replacing the intermediate ropes 62, 62 ', and the open / close ropes 57, 57 wound around the open / close drums 51, 51'. The replacement work can be simplified as compared with the case where all of 'are replaced. However, the rope joints 63 and 64 are compared with the open / close ropes 57 and 57' and the intermediate ropes 62 and 62 '. The diameter of the rope joints 63 and 64 has a problem of impacting the machine when passing through the sheaves 59 and 59 'on the trolley 52. To, had the problem of generating large vibration and noise.

  In the four-drum unloader, the hoisting rope 54 led from the hoisting drum 50 and the opening / closing drum 51 to the grab bucket 53 through the sheaves 55, 58 on the land side and the sheaves 56, 59 on the trolley 52; How to hang the open / close rope 57, and further the winding led to the grab bucket 53 from the winding drum 50 ′ and the opening / closing drum 51 ′ through the sea sheaves 55 ′, 58 ′ and the sheaves 56 ′, 59 ′ on the trolley 52. In many cases, no consideration is given to how to hang the upper rope 54 ′ and the opening / closing rope 57 ′. For this reason, the direction in which the hoisting ropes 54, 54 ′ and the opening / closing ropes 57, 57 ′ are once bent is reverse. If the bending in the opposite direction is repeated in this way, the ropes 54, 54 ′, 57, 57 ′ are damaged and the life is shortened. It had.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a rope trolley type unloader capable of simplifying the configuration of the rope trolley type unloader by the rope trolley method and facilitating maintenance.

The present invention is a rope trolley type unloader in which a grab bucket is suspended from a trolley traveling on a girder and a boom,
A first hoisting drum provided on the girder, a first hoisting rope fixed from the first upper hoisting drum to a grab bucket via a first sheave provided on a trolley;
The second winding upper drum fixed on the grab bucket via the second winding upper drum provided on the girder, the tip sheave fed from the second winding upper drum and provided at the tip of the boom, and the second sheave provided on the trolley. With a rope,
A hook block in which one end is fixed to the grab bucket and the other end of the drive rope hung around the upper fixed sheave and the lower moving sheave provided in the grab bucket is fixed;
An open / close drum provided on the girder, a third sheave provided from the open / close drum and provided on the trolley, and hung around an intermediate sheave provided on the hook block, and further via a fourth sheave coaxial with the third sheave. And an open / close rope fixed to the tip of the boom.

  In the rope trolley type unloader, the first sheave hung with the first hoisting rope is located on the sea side of the trolley, and the second sheave hung with the second hoisting rope is located on the land side of the trolley, It is preferable that the first sheave and the second sheave are arranged so that a distance between the first hoisting rope and the second hoisting rope going from the first sheave and the second sheave to the grab bucket decreases downward.

  Further, in the rope trolley type unloader, the first hoisting rope fed out from the upper surface of the first hoisting drum is hung on the upper surface of the first sheave of the trolley, and the tip is fixed to the grab bucket. The second hoisting rope drawn out from the lower surface of the second hoisting drum is hung on the lower surface of the tip sheave provided at the tip of the boom, led from the upper surface, and further hung on the upper surface of the second sheave of the trolley. It is preferable that the tip is fixed to the grab bucket.

  According to the rope trolley type unloader of the present invention, the three drums composed of the first winding upper drum and the second winding upper drum and the opening and closing drum enable the raising and lowering of the grab bucket, the opening and closing, and the traversing of the trolley. The apparatus configuration can be simplified, and further, the number of drums to be synchronized can be reduced, so that an excellent effect that the control can be facilitated can be achieved.

  Furthermore, both ends of the drive rope hung around the lower moving sheave and the upper fixed sheave provided in the grab bucket are fixed to the hook block, and the grab bucket is suspended from the trolley by the open / close rope via the intermediate sheave provided in the hook block. Therefore, the drive rope, which is separated from the drive rope and fixed to the hook block, can be easily replaced, and does not have a conventional rope joint, so it collides with the sheave and vibrates. In addition, it is possible to prevent the problem of noise generation.

It is a side view which shows one Example of the grab bucket type unloader which is an Example of this invention. FIG. 2 is a perspective view of the apparatus of FIG. It is explanatory drawing which showed the state which opens the grab bucket of the apparatus of FIG. It is a side view which shows the whole structure of the rope trolley type unloader which is the Example of this invention. It is a perspective view which shows an example of the conventional 4 drum type unloader.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 4 is a side view showing the overall configuration of the rope trolley type unloader according to the present invention. The rope trolley type unloader has a front leg 1 on the sea side and a rear leg 2 on the land side and runs on a rail 3 on the quay. A machine body 4, a boom 6 that can be lifted around a pin 6 ′ projecting from a girder 5 provided on the land side above the machine body 4 to the sea side, and along the longitudinal direction of the boom 6 and the girder 5. It has a traversing trolley 7 and a grab bucket 53 suspended from the trolley 7 so as to be lifted and lowered. Then, the grab bucket 53 opened from the trolley 7 located on the sea side of the boom 6 is suspended from the upper opening 9 of the bulk carrier 8 and placed on the bulk, and the grab bucket 53 is closed. The grab bucket 53 is moved up to the land side by moving the trolley 7 to the land side, and the grab bucket 53 is provided in the machine main body 4. The loose article is thrown into the hopper 10 by opening when it comes to 10. The bulk material thrown into the hopper 10 is supplied to the land conveyor 12 by an in-machine conveyor 11 provided in the machine body 4. 13 is provided so as to project from the machine body 4 onto the bulk carrier 8, and a bulk collection plate for collecting the bulk falling from the grab bucket 53, 14 is a mobile cab for operating the unloader, and 15 is a machine These are a machine room and an electrical component room provided at the land side end of the upper part of the main body 4.

  The rope trolley type unloader shown in FIG. 4 includes the configuration shown in FIGS. 1 and 2 for operating the grab bucket 53. That is, the 1st winding upper drum 16, the 2nd winding upper drum 17, and the opening-and-closing drum 18 are arrange | positioned at the land side edge part of the girder 5 shown to FIG. 1, FIG.

  The first hoisting rope 19 fed out from the first hoisting drum 16 is hung on the first sheave 20 provided on the sea side of the trolley 7, and then the tip is placed on the sea side of the upper frame 53 c of the grab bucket 53. It is fixed.

  The second hoisting rope 21 fed out from the second hoisting drum 17 is hung on the tip sheave 22 provided at the tip of the boom 6, and further on the second sheave 23 provided on the land side of the trolley 7. After being hung, the tip is fixed to the land side of the upper frame 53c of the grab bucket 53.

  In the figure, reference numeral 25 denotes a hook block. After the drive rope 24 having one end fixed to a required portion of the grab bucket 53 is hung around the lower moving sheave 60 and the upper fixed sheave 61 provided in the grab bucket 53, A drive rope 24 ′ having one end fixed to the hook block 25 and one end fixed to a required portion of the grab bucket 53 is hung on the lower moving sheave 60 and the upper fixed sheave 61 provided in the grab bucket 53 a plurality of times. After the rotation, the other end is fixed to the hook block 25.

  The open / close rope 26 fed out from the open / close drum 18 is connected to an intermediate sheave 28 provided in the hook block 25 via a third sheave 27 provided between the first sheave 20 and the second sheave 23 of the trolley 7. Further, it is hung on a fourth sheave 27 ′ that is coaxial with the third sheave 27, and its tip is fixed to a fixing point 26 ′ at the tip of the boom 6.

  As described above, the first sheave 20 that hangs the first hoisting rope 19 is located on the sea side of the trolley 7, and the second sheave 23 that hangs the second hoisting rope 21 is located on the land side of the trolley 7. Therefore, by setting the interval between the first sheave 20 and the second sheave 23, the first hoisting rope 19 and the second hoisting head from the first sheave 20 and the second sheave 23 to the grab bucket 53 are set. The distance between the ropes 21 decreases from the top to the bottom, that is, forms a V shape.

  Further, the first hoisting rope 19 fed out from the upper surface of the first hoisting drum 16 is hung on the upper surface of the first sheave 20 of the trolley 7 and the tip of the first hoisting rope 19 is on the sea side of the upper frame 53c of the grab bucket 53. It is fixed to. The second hoisting rope 21 fed out from the lower surface of the second hoisting drum 17 is hung on the lower surface of the tip sheave 22 provided at the tip of the boom 6 and led out from the upper surface. The rear end of the two-sheave 23 is fixed to the land side of the upper frame 53c of the grab bucket 53. Further, the open / close rope 26 drawn out from the upper surface of the open / close drum 18 is hung on the upper surface of the third sheave 27 of the trolley 7 and guided downward from the left side, and left on the intermediate sheave 28 provided in the hook block 25. The rear end of the fourth sheave 27 ′ coaxial with the third sheave 27 and hooked on the upper surface from the right side is fixed to the fixing point 26 ′ at the front end of the boom 6. ing. Accordingly, the first hoisting rope 19, the second hoisting rope 21, and the opening / closing rope 26 are wound around the drums 16, 17, 18 and the sheaves 20, 22, 23, 27, 28, 27 ′. This is a forward bending in which the winding direction with respect to is the same bending direction.

  Next, the operation of the above embodiment will be described.

  As shown in FIGS. 1 and 2, when the opening / closing rope 26 is wound by the opening / closing drum 18 in a state where the rotation of the first winding drum 16 and the second winding drum 17 is stopped, the hook block 25 is pulled up. As a result, the lower moving sheave 60 is pulled upward so that the distance between the lower moving sheave 60 and the upper fixed sheave 61 provided in the grab bucket 53 is narrowed, so that the bucket body 53a is closed.

  In order to open the bucket body 53a from the state shown in FIGS. 1 and 2, the opening / closing rope 26 is fed out by the opening / closing drum 18 in a state where the first winding drum 16 and the second winding drum 17 are stopped. When the opening / closing rope 26 is extended, as shown in FIG. 3, the bucket body 53a connected to the upper frame 53c via a pin and the tie rod 53b is opened by its own weight. As the lower moving sheave 60 is pulled downward, the distance between the lower moving sheave 60 and the upper fixed sheave 61 is widened to open the bucket body 53a.

  On the other hand, in order to raise the grab bucket 53, the first winding upper drum 16 and the second winding upper drum 17 simultaneously wind the first winding upper rope 19 and the second winding upper rope 21, and the opening / closing drum 18. By winding up the opening and closing rope 26, the bucket body 53a can be raised while maintaining the closed or open state.

  Further, in order to lower the grab bucket 53, the first winding upper rope 19 and the second winding upper rope 21 are simultaneously fed out by the first winding upper drum 16 and the second winding upper drum 17, and the opening and closing drum 18 is used. By feeding the opening / closing rope 26, the bucket body 53a can be lowered while maintaining the closed or open state. Further, during the operation of raising or lowering the grab bucket 53, the opening and closing rope 26 is wound up and fed out at a speed different from the synchronized speed by the opening and closing drum 18, thereby raising and lowering the grab bucket 53. During the operation, the bucket body 53a can be opened or closed.

  Further, when the rotation of the opening / closing drum 18 is stopped, when the first winding upper rope 19 is wound by the first winding upper drum 16 and the second winding upper rope 21 is taken out by the second winding upper drum 17, Trolley 7 ramps to the land side. Similarly, when the first hoisting rope 19 is fed out by the first hoisting drum 16 and the second hoisting rope 21 is taken up by the second hoisting drum 17, the trolley 7 traverses to the sea side. . At this time, the third sheave 27, the fourth sheave 27 ′ and the intermediate sheave 28 provided in the trolley 7 only change their positions with respect to the opening / closing rope 26, and therefore the grab bucket 53 is not opened / closed. In the course of the traversing operation, the bucket body 53a can be opened or closed while traversing by feeding and retracting the open / close rope 26 by the open / close drum 18.

  As shown in the above embodiment, the grab bucket 53 can be moved up and down, opened and closed, and the trolley 7 can be traversed by the three drums including the first and second winding drums 16 and 17 and the opening and closing drum 18. Therefore, the configuration of the apparatus can be simplified as compared with the conventional four-drum unloader, and the number of drums to be synchronized is reduced, so that the control can be facilitated.

  Further, the other ends of the drive ropes 24, 24 ′ which are hung around the lower moving sheave 60 and the upper fixed sheave 61 provided in the grab bucket 53 and fixed to the grab bucket 53 are fixed to the hook block 25. Since the grab bucket 53 is suspended from the trolley 7 by the opening / closing rope 26 via the intermediate sheave 28 provided in the hook block 25, the driving rope 24 that is separated from the opening / closing rope 26 and fixed to the hook block 25. , 24 ′ can be easily replaced and does not have a conventional rope joint, and can prevent problems such as impact, vibration and noise on the machine when the rope joint collides with the sheave. .

  Also, by setting the distance between the first sheave 20 and the second sheave 23 provided in the trolley 7, the first hoisting rope 19 and the first hoisting rope 19 from the first sheave 20 and the second sheave 23 toward the grab bucket 53 and the Since the interval between the two winding ropes 21 is decreased from the upper side to the lower side, the swing of the grab bucket 53 when the trolley 7 traverses can be suppressed. It becomes easy to do.

  In addition, the first hoisting rope 19, the second hoisting rope 21, and the opening / closing rope 26 are wound around the drums 16, 17, 18 and the sheaves 20, 22, 23, 27, 28, 27 ′. Since the winding direction is the same as the bending direction, the ropes 19, 21, and 26 are not bent in the direction opposite to the direction once bent. 21 and 26 are suppressed from being damaged, and the life can be extended.

  The rope trolley type unloader according to the present invention is not limited to the above-described embodiment, and is not limited to the shape of the grab bucket. In addition, various modifications can be made without departing from the gist of the present invention. Of course.

  The rope trolley type unloader of the present invention can enable the raising / lowering of the grab bucket, the opening / closing of the grab bucket, and the traversing of the trolley by the three drums including the first winding upper drum, the second winding upper drum, and the opening / closing drum.

4 Machine body 5 Girder 6 Boom 7 Trolley 16 1st roll upper drum 17 2nd roll upper drum 18 Opening / closing drum 19 1st roll upper rope 20 1st sheave 21 2nd roll upper rope 22 Tip sheave 23 2nd sheave 24, 24 'Drive rope 25 Hook block 26 Opening and closing rope 26' Fixed point 27 3rd sheave 27 '4th sheave 28 Intermediate sheave 53 Grab bucket 60 Lower moving sheave 61 Upper fixed sheave

Claims (3)

A rope trolley type unloader in which a grab bucket is suspended from a trolley traveling on a girder and a boom,
A first hoisting drum provided on the girder, a first hoisting rope fixed from the first upper hoisting drum to a grab bucket via a first sheave provided on a trolley;
The second winding upper drum fixed on the grab bucket via the second winding upper drum provided on the girder, the tip sheave fed from the second winding upper drum and provided at the tip of the boom, and the second sheave provided on the trolley. With a rope,
A hook block in which one end is fixed to the grab bucket and the other end of the driving rope hung around the upper fixed sheave and the lower moving sheave provided in the grab bucket is fixed;
An open / close drum provided on the girder, a third sheave provided from the open / close drum and provided on the trolley, and hung around an intermediate sheave provided on the hook block, and further via a fourth sheave coaxial with the third sheave. And an open / close rope fixed to the tip of the boom.   The first sheave hung with the first hoisting rope is located on the sea side of the trolley, the second sheave hung with the second hoisting rope is located on the land side of the trolley, and the first sheave and the first sheave The first sheave and the second sheave are arranged so that a distance between a first hoisting rope and a second hoisting rope going from the two sheaves toward the grab bucket decreases downward. Rope trolley type unloader.   The first hoisting rope drawn out from the upper surface of the first hoisting drum is hooked on the upper surface of the first sheave of the trolley and the front end is fixed to the grab bucket, and is fed out from the lower surface of the second hoisting drum. The second winding hoisting rope is hung on the lower surface of the tip sheave provided at the tip of the boom and led out from the upper surface, and further, the rear leading end hooked on the upper surface of the second sheave of the trolley is fixed to the grab bucket. The rope trolley type unloader according to claim 1 or 2, wherein

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