JP6787645B1 - Spreader anti-vibration device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spreader anti-vibration device capable of stopping the runout of a spreader provided on a movable gantry crane and having a relatively space-saving configuration. SOLUTION: A spreader anti-vibration device includes first to fourth drums 23 to 26 arranged on a trolley, a set of four first rope locking portions 29 provided on an upper surface of a spreader, and a pair of second drums. A cable locking portion 34 and a plurality of steady rest sheaves 32a, 32b, 35a to 35c are provided. Further, the spreader anti-vibration device is fed out from the first drum 23 or the second drum 24 in the vertical direction and hung in the horizontal direction, and is inclined in the horizontal direction while intersecting with each other to the first rope locking portion 29. Two sets of two locked lateral steady rest ropes 27 and a third drum 25 or a fourth drum 26 are extended to one or the other in the vertical direction, respectively, and are inclined in the vertical direction while intersecting with each other. A pair of longitudinal steady rest ropes 28 locked to the two rope locking portions 34 are provided. [Selection diagram] Fig. 2

Description

The present invention relates to a spreader shaker for a crane provided with a spreader, and more particularly to a spreader shaker that stops lateral and vertical runout of the spreader.

At harbors and the like, container cranes are used in which containers are grabbed by spreaders, lifted, and stacked in place. Among the container cranes, there is a self-propelled portal type container crane called a transfer crane (see, for example, Patent Document 1).

FIG. 7 shows the transfer crane 100B disclosed in Patent Document 1. The transfer crane 100B includes a girder 101, a trolley 102, a spreader 103, a traveling device 104, an elevating sheave 105, and an elevating rope 106. The spreader 103 is suspended from the elevating rope 106 via the elevating sheave 105, and is elevated and lowered by hoisting and lowering the elevating rope 106 by an elevating drum (not shown) provided on the trolley 102. The spreader 103 has a main body 103a and grip portions 103b provided at four corners of the main body 103a. Each grip portion 103b has an arm portion that can be expanded and contracted in the vertical direction (Y-axis direction in FIG. 7) according to the width of the container C, and a twist lock portion that is locked to the container C, and each arm. The container C is gripped by interlocking the portions and the twist lock portions. The transfer crane 100B moves the spreader 103 laterally by moving the trolley 102 in the lateral direction (X-axis direction in FIG. 7), and moves in the vertical direction (Y-axis direction in FIG. 7) by the traveling device 104. The gripped container C is moved to a desired position. A power supply cable 107 for operating the grip portion 103b hangs down from the trolley 102 to the spreader 103, and a cable storage device 109 for storing the cable 107 at a predetermined position is provided on the upper surface of the main body 103a. It is provided.

By the way, in this kind of transfer crane, if the spreader swings every time it moves, it is dangerous and the work is delayed. For this reason, a spreader shake device for stopping the runout of the spreader has been developed. For example, in the spreader rocking device (stamping device) disclosed in Patent Document 2, an elevating rope for raising and lowering the spreader is bridged between the trolley and the spreader so as to be inclined in the vertical direction and the horizontal direction. More specifically, in order to regulate the lateral runout, the lifting ropes are laid out from the four corners of the upper surface of the spreader toward the lateral upper side of the spreader and inclined in a ∨ shape. In addition, in order to regulate the runout in the vertical direction, the lifting ropes are laid in a ∨ shape from the four corners on the upper surface of the spreader toward the inside and upper side in the vertical direction of the spreader. As a result, this spreader rocking device regulates the runout of the spreader by the tension of the elevating measures that are bridged.

However, in the case of the transfer crane 100B, since the rocking device occupies a relatively large space on the spreader, the cable can be stored by inclining the elevating rope from the four corners on the upper surface of the spreader toward the inside in the vertical direction of the spreader as described above. The lifting cable comes into contact with the device 109. For this reason, it has been difficult for the transfer crane 100B to introduce the above-mentioned rocking device. Therefore, conventionally, the anti-vibration device provided in the transfer crane 100B has only the lateral anti-sway cable and does not have the vertical anti-sway cable, and can stop the vertical vibration of the spreader. There wasn't.

Japanese Unexamined Patent Publication No. 2005-0083370 Jikkenhei 03-100279

Therefore, the problem to be solved by the present invention is that the lateral and vertical runout of the spreader provided in the gantry crane capable of traveling in the vertical direction can be stopped, and the space is relatively saved. The purpose is to provide a spreader anti-vibration device.

In order to solve the above problems, the spreader shaker according to the present invention is
A spreader anti-vibration device installed on a gantry crane that can travel in the vertical direction.
The gantry crane
With a girder
A trolley that moves laterally along the girder,
An elevating drum provided on the trolley and connected to the same rotating shaft or a plurality of rotating shafts connected on the same rotating axis via a cam clutch .
A spreader that can be lifted and lowered via a lifting rope drawn out from the lifting drum is provided.
The spreader anti-vibration device
The four first to fourth steady rest drums provided on the trolley, and
A set of four first rope locking portions provided on the upper surface of the spreader at intervals in the vertical and horizontal directions from the center of the upper surface of the spreader.
A pair of second cord locking portions provided on the upper surface of the spreader at intervals in the vertical direction from the center of the upper surface of the spreader.
With multiple steady rest sheaves
A pair of lateral steady rest ropes extended from each of the first drum and the second drum in one of the vertical directions, and the spreader is laterally oriented through the steady rest sheaves so as to be separated from each other. A lateral steady rest cord that is hung on the outside and is inclined in the lateral direction while intersecting with each other and locked to the first cord locking portion on one side in the vertical direction.
Another pair of lateral steady rest ropes extending from each of the first drum and the second drum to the other in the vertical direction, and of the spreader via the steady rest sheave so as to be separated from each other. A lateral steady rest rope that is hung outward in the lateral direction, is inclined in the lateral direction while intersecting with each other, and is locked to the first cord locking portion on the other side in the vertical direction.
A pair of vertical steady rest cords extended to one or the other in the vertical direction so as to be separated from each other from the third drum and the fourth drum, and of the spreader via the steady rest sheave. A vertical steady rest rope that is hung inward in the vertical direction and is inclined in the vertical direction while intersecting with each other and locked to the second rope locking portion.
A single brake disc connected to the rotating shaft,
It is characterized by comprising a single brake that brakes the brake disc and prevents the lateral and vertical steady rest ropes from being drawn out from the four steady rest drums 1 to 4. To do.

The spreader anti-vibration device is preferably
The spreader is a telescopic spreader that changes the beam length according to the size of the container.
Spreader body and
Stretchable arms provided at the four corners of the spreader body,
It has a cable storage device which is arranged on the upper surface of the spreader main body and stores a cable hung from the trolley to supply electric power for operating the arm portion.
The second cable locking portion is arranged on the upper surface of the spreader in the vertical direction inside the cable accommodating device.

The spreader anti-vibration device is preferably
The spreader
A locking portion that locks the spreader and the container,
An operating unit arranged on the upper surface of the spreader and for operating the locking portion,
Further having a bridge portion arranged on the upper surface of the spreader so as to straddle the operating unit.
The second rope locking portion is provided on the upper surface of the bridge portion.

The spreader anti-vibration device of the present invention can stop the lateral and vertical runout of the spreader provided in the gantry crane capable of traveling in the vertical direction, and is configured to save a relatively large amount of space.

It is a schematic perspective view which shows the transfer crane provided with the spreader shake device which concerns on one Embodiment of this invention. It is the schematic perspective view which shows the leaving structure of the steady rest rope provided in the elevating rope of FIG. 1 and the spreader vibration steady-state device which concerns on this embodiment. FIG. 2 is a schematic perspective view showing the leaving structure of each rope individually, in which A shows the leaving structure of the elevating rope, B shows the leaving structure of the lateral steady rest rope, and C shows the vertical steady rest. The leaving structure of the rope is shown. It is a schematic front view of the spreader vibration vibration device which concerns on this embodiment. It is a schematic side view of the vibration vibration device of FIG. It is a schematic top view of the vibration vibration device of FIG. It is a schematic perspective view which shows an example of the conventional transfer crane.

Hereinafter, an embodiment of a spreader anti-vibration device (hereinafter, simply referred to as “anti-vibration device”) according to the present invention will be described with reference to the drawings. In the present embodiment, the horizontal direction is indicated by a double-headed arrow X, the vertical direction is indicated by a double-headed arrow Y, and the vertical direction is indicated by a double-headed arrow Z.

<Transfer Crane>
First, the transfer crane 100A provided with the spreader anti-vibration device 20 according to the present embodiment will be described with reference to FIGS. 1 to 3.

As shown in FIG. 1, the transfer crane 100A includes a pair of left and right sill beams 2 provided on two traveling devices 1 on each side and a pair of front and rear vertical portions 3 erected on the upper surface of each sill beam 2. It is a runnable portal crane equipped with a pair of front and rear girders 4 bridged between the left and right vertical portions 3.

The transfer crane 100A further includes a trolley 5 that moves laterally along the girder 4, an elevating drum 6 (see FIGS. 2 and 3A) provided on the trolley 5, and a plurality of elevating sheaves 7a, 7b, 7c. It includes a 7d (see FIGS. 2 and 3A), an elevating rope 8, and a spreader 9 that can be elevated via the elevating rope 8 drawn out from the elevating drum 6. Further, a cable 10 is hung from the trolley 5 on the spreader 9.

As shown in FIGS. 2 and 3A, the transfer crane 100A further includes a fixing bracket 11 and a spreader swivel device 12.

The base ends of the four elevating ropes 8 are wound around the elevating drum 6. The tips of two of the four elevating ropes 8 are directly wound around the elevating sheave (moving pulley) 7a provided on one end side in the length direction of the spreader 9, and the remaining two elevating ropes 8 The tip of the trolley 5 is wound around the elevating sheave (moving pulley) 7a provided on the other end side in the length direction of the spreader 9 via the elevating sheave (constant pulley) 7b provided on the trolley 5. The tips of two of the lifting ropes 8 wound around the lifting sheave 7a of the spreader 9 are pulled up to the trolley 5 side and provided on the trolley 5 via the lifting sheaves (fixed pulleys) 7c and 7d. It is introduced in the spreader swivel device 12. The tips of the remaining two elevating ropes 8 are pulled up toward the trolley 5 and locked to the fixing bracket 11 provided on the trolley 5. As a result, the elevating rope 8 is wound up or down by the forward and reverse rotation of the elevating drum 6, and the spreader 9 is moved up and down. Further, the spreader swivel device 12 swivels the spreader 9 by selectively pushing and pulling the introduced elevating ropes 8.

<Spreader>
Next, the spreader 9 will be described with reference to FIGS. 4 to 6.

As shown in FIGS. 4 and 5, the spreader 9 includes a spreader main body 90, a set of four locking portions 91 that are detachably locked to the container C, and a cable storage device 92 that stores the cable 10. , And a junction box 93. The cable 10 transmits a control signal and electric power to the locking portion 91.

The cable storage device 92 is provided on the Y1 side in the vertical direction at a distance from the central portion of the upper surface of the spreader main body 90. The cable storage device 92 includes four legs 92a, a cylindrical cable storage body 92b provided on the upper part of the legs 92a, and a truncated cone-shaped guide frame 92c provided inside the cable storage body 92b. And have. The cable storage body 92b has a cone-shaped guide member in the center thereof, and the cable 10 hanging from the trolley 5 is stored in a spiral shape along the guide member.

The junction box 93 is provided in the lower portion between the central portion of the upper surface of the spreader main body 90 and the cable storage device 92. The junction box 93 relays between the cable 10 and the locking portion 91.

The locking portions 91 are provided at the four corners of the spreader main body 90, and have an arm portion 91a and a twist lock portion 91b. The spreader 9 is a telescopic spreader that changes the beam length according to the size of the container C, and the arm portion 91a is vertically oriented to fit the size of the container C by the electric power and the control signal transmitted from the cable 10. It expands and contracts.

As shown in FIGS. 5 and 6, the spreader 9 is a pair of bridge portions 96 and a rectangular operating unit 94 having a predetermined height on the Y2 side in the vertical direction from the center on the upper surface of the spreader main body 90. And further.

The operation unit 94 is a hydraulic unit and includes a hydraulic pump, a hydraulic motor, and a hydraulic oil tank. Based on the control signal transmitted from the cable 10, the operation unit 94 drives the hydraulic motor and the hydraulic pump to supply hydraulic oil from the hydraulic oil tank to the twist lock portion 91b to operate the hydraulic cylinder of the twist lock portion 91b. The twist lock portion 91b and the container C are locked.

The bridge portion 96 has a pair of left and right leg portions 96a and a bridge portion 96b bridged between the leg portions 96a, and is a spreader so as to straddle the space above the operation unit 94 and the junction box 93. One is provided on each of the Y1 side and the Y2 side with the central portion of 9 interposed therebetween.

<Spreader anti-vibration device>
Next, each configuration of the spreader anti-vibration device 20 will be described with reference to FIGS. 4 to 6.

As shown in FIGS. 4 to 6, the vibration damping device 20 includes four torque motors 21, four speed reducers 22, first and second drums 23 and 24 for lateral vibration damping, and longitudinal vibration. Third and fourth drums 25 and 26 for stopping, a set of four first ropes 27 for lateral vibration damping, a pair of second ropes 28 for vertical vibration damping, and a set of four. The first rope locking portion 29, the rotating shafts 30a and 30b, the coupling 31, and four first and second sheaves 32a and 32b for lateral vibration arrest are provided.

The four first to fourth drums 23 to 26 are connected to each other via rotation shafts 30a and 30b on the lateral X1 side or the X2 side, respectively. The rotating shafts 30a and 30b are coupled by a coupling 31. In this way, the first to fourth drums 23 to 26 are connected to the rotation shafts 30a and 30b connected on the same rotation axis extending in the lateral direction. The first to fourth drums 23 to 26 are fixed to the rotating shafts 30a and 30b by cam clutches, respectively, and torque is applied to the rotating shafts 30a and 30b in the normal rotation direction in which the first rope 27 or the second rope 28 is wound up. Can rotate individually in the forward rotation direction because it does not transmit. The first to fourth drums 23 to 26 may be connected to a single rotation shaft.

A set of four first rope locking portions 29 are provided on the upper surface of the spreader 9 at intervals in the vertical and horizontal directions from the center of the upper surface of the spreader 9.

The base ends of the first rope 27 of a set of four are wound around the first and second drums 23 and 24, respectively, and the tips of the first rope 27 are wound on the first and second sheaves 32a, respectively. Each is locked to the first rope locking portion 29 via 32b.

The anti-vibration device 20 further includes a pair of second rope locking portions 34, and two third to fifth sheaves 35a to 35c for longitudinal anti-vibration.

A pair of second rope locking portions 34 are provided at the center of the upper surface of each bridge portion 96, that is, at the center of the upper surface of the spreader 9 in the lateral direction at intervals in the vertical direction from the center of the upper surface of the spreader 9. ..

The base end of the pair of second ropes 28 is wound around the third and fourth drums 25 and 26, respectively, and the tip of the second rope 28 is routed through the third to fifth sheaves 35a to 35c. It is locked to each of the two rope locking portions 34.

The first to fourth drums 23 to 26 are respectively connected to the torque motor 21 via the speed reducer 22, and the first and second ropes 27, which are always constant torque due to the rotational force of the respective torque motors 21. 28 are wound up respectively. As a result, even if the spreader 9 is shaken and the tension is released, the first and second ropes 27 and 28 are instantly wound up by the first to fourth drums 23 to 26, so that the tension is instantly equal to or higher than the predetermined tension. Is given.

The four first and second sheaves 32a and 32b are fixed pulleys provided on the trolley 5, and the four first sheaves 32a are the longitudinal outer sides of the spreader 9 from the first drum 23 and the second drum 24. The four first ropes 27 drawn out to the front are turned to the laterally outward sides of the spreader 9, respectively. The four second sheaves 32b divert the four first cords 27 via the first sheave 32a so as to incline laterally inward and downward of the spreader 9, respectively.

The two third to fifth sheaves 35a to 35c are fixed pulleys provided in the trolley 5, and the third and fourth sheaves 35a and 35b are the third drum 25 and the fourth drum 26 to the spreader 9. A pair of second ropes 28, which are extended outward in the vertical direction, are turned inward in the horizontal direction of the spreader 9. The fifth sheave 35c turns the pair of second cords 28 via the third and fourth sheaves 35a and 35b so as to incline inward in the longitudinal direction of the spreader 9 and incline downward, respectively.

As shown in FIGS. 3 to 6, the anti-vibration device 20 further includes a brake disc 38 and a brake 39. The brake disc 38 is connected to the rotating shafts 30a and 30b via a coupling 31. The brake 39 constantly brakes the brake disc 38. As a result, the brake 39 suppresses the rotation of the rotating shafts 30a and 30b, so that the first and second ropes 27 and 28 are the first to fourth drums except when the spreader 9 is lowered by the elevating drum 6. It is restrained from being paid out from 23 to 26. In other words, when the spreader 9 is lowered by the elevating drum 6, the rotating shafts 30a and 30b rotate against the braking force of the brake 39 due to the weight of the spreader 9. Then, the first to fourth drums 23 to 26 rotate in conjunction with the rotation shafts 30a and 30b, the first and second ropes 27 and 28 are fed out, and the spreader 9 is the first and second ropes 27 and 28. It descends under tension. Since the first to fourth drums 23 to 26 are connected to the anti-vibration device 20, it is only necessary to provide one brake disc 38 and one brake 39.

Next, the leaving structures of the first and second cords 27 and 28 will be described with reference to FIGS. 2 and 3.

As shown in FIGS. 2 and 3, a pair of first ropes 27 drawn out from the first drum 23 and the second drum 24 in the Y1 direction are separated from each other via the first sheave 32a of the spreader 9. It is hung on the outer side in the lateral direction, is inclined toward the inner side in the lateral direction while intersecting with each other via the second sheave 32b, and is locked to the first rope locking portion 29 on the Y1 side. Similarly, a pair of first ropes 27 drawn out from the first drum 23 and the second drum 24 in the Y2 direction are hung on the laterally outer side of the spreader 9 so as to be separated from each other via the first sheave 32a. At the same time, they are inclined inward in the lateral direction while intersecting each other via the second sheave 32b and are locked to the first rope locking portion 29 on the Y2 side.

As a result, the tension of the first rope 27 acts laterally on the spreader 9. Therefore, when the lateral runout of the spreader 9 occurs, the first and second drums 23 and 24 instantly wind up the first rope 27, so that the tension applied to the first rope 27 is applied in the lateral direction of the spreader 9. Stop the runout instantly.

A pair of second ropes 28, which are vertically extended from the third drum 25 and the fourth drum 26 so as to be separated from each other, are moved inward in the lateral direction of the spreader 9 via the third to fifth sheaves 35a to 35c. Along with being hung, they are inclined in the vertical direction while intersecting each other and are locked to the second rope locking portion 34 on the Y1 side or the Y2 side, respectively.

As a result, the tension of the second cord 28 acts on the spreader 9 in the vertical direction. Therefore, when the vertical runout of the spreader 9 occurs, the tension applied to the second rope 28 by the third and fourth drums 25 and 26 instantaneously winding the second rope 28 is applied in the vertical direction of the spreader 9. Stops the runout instantly.

As described above, the vibration isolation device 20 can stop the vibration of the spreader 9 in the vertical direction and the horizontal direction. Moreover, the anti-vibration device 20 is relatively space-saving by arranging the second rope locking portion 34 inside the cable accommodating device 92 and crossing the first rope 27 and the second rope 28, respectively. It is composed of. As a result, the vibration isolation device 20 can be introduced into the transfer crane 100A without changing the arrangement of the cable storage device 92. Further, the anti-vibration device 20 arranges the operation unit 94 and the junction box 93 by arranging the second rope locking portion 34 on the upper surface of the bridge portion 96 arranged so as to straddle the operation unit 94 and the junction box 93. Can be introduced into the transfer crane 100A without changing.

Although one embodiment of the spreader shaker according to the present invention has been described above, the present invention is not limited to the above embodiment.

The spreader 9 may be, for example, a fixed spreader having no arm portion 91a.

The operating unit 94 may be, for example, an electromagnetic unit and is not particularly limited. In this case, the operation unit 94 locks the twist lock portion 91b to the container C by an electromagnetic action.

100A Transfer Crane 1 Traveling device 2 Silbeam 3 Vertical part 4 Girder 5 Trolley 6 Elevating drum 7a, 7b, 7c, 7d Elevating sheave 8 Elevating rope 9 Spreader 90 Spreader body 91 Locking part 91a Arm part 91b Twist lock part 92 Cable storage device 92a Leg 92b Cable storage 92c Guide frame 93 Junction box 94 Operation unit 96 Bridge 96a Leg 96b Bridge 10 Cable 11 Fixed bracket 12 Spreader swivel device 20 Spreader vibration device 21 Torque motor 22 Reducer 23 1st drum 24 2nd drum 25 3rd drum 26 4th drum 27 1st rope 28 2nd rope 29 1st rope locking portion 30a, 30b Rotating shaft 31 Coupling 32a 1st sheave (lateral steady rest sheave) )
32b 2nd sheave (sheave for lateral steady rest)
34 2nd rope locking part 35a 3rd sheave (vertical steady rest sheave)
35b 4th sheave (vertical steady rest sheave)
35c 5th sheave (vertical steady rest sheave)
38 Brake Disc 39 Brake 100B Conventional Transfer Crane 101 Girder 102 Trolley 103 Spreader 103a Main Body 103b Grip 104 Traveling Device 105 Lifting Sheave 106 Lifting Cable 107 Cable 109 Cable Storage Device C Container

Claims (3)

A spreader anti-vibration device installed on a gantry crane that can travel in the vertical direction.
The gantry crane
With a girder
A trolley that moves laterally along the girder,
The elevating drum provided on the trolley and
A spreader that can be lifted and lowered via a lifting rope drawn out from the lifting drum is provided.
The spreader anti-vibration device
The four first to fourth steady rest drums provided on the trolley and connected to the same rotation shaft or a plurality of rotation shafts connected on the same rotation axis via a cam clutch .
A set of four first rope locking portions provided on the upper surface of the spreader at intervals in the vertical and horizontal directions from the center of the upper surface of the spreader.
A pair of second cord locking portions provided on the upper surface of the spreader at intervals in the vertical direction from the center of the upper surface of the spreader.
With multiple steady rest sheaves
A pair of lateral steady rest ropes extended from each of the first drum and the second drum in one of the vertical directions, and the spreader is laterally oriented through the steady rest sheaves so as to be separated from each other. A lateral steady rest cord that is hung on the outside and is inclined in the lateral direction while intersecting with each other and locked to the first cord locking portion on one side in the vertical direction.
Another pair of lateral steady rest ropes extending from each of the first drum and the second drum to the other in the vertical direction, and of the spreader via the steady rest sheave so as to be separated from each other. A lateral steady rest rope that is hung outward in the lateral direction, is inclined in the lateral direction while intersecting with each other, and is locked to the first cord locking portion on the other side in the vertical direction.
A pair of vertical steady rest cords extended to one or the other in the vertical direction so as to be separated from each other from the third drum and the fourth drum, and of the spreader via the steady rest sheave. A vertical steady rest rope that is hung inward in the vertical direction and is inclined in the vertical direction while intersecting with each other and locked to the second rope locking portion.
A single brake disc connected to the rotating shaft,
It is characterized by comprising a single brake that brakes the brake disc and prevents the lateral and vertical steady rest ropes from being drawn out from the four steady rest drums 1 to 4. Spreader anti-vibration device. The spreader is a telescopic spreader that changes the beam length according to the size of the container.
Spreader body and
Stretchable arms provided at the four corners of the spreader body,
It has a cable storage device which is arranged on the upper surface of the spreader main body and stores a cable hung from the trolley to supply electric power for operating the arm portion.
The spreader anti-vibration device according to claim 1, wherein the second cable locking portion is arranged vertically inside the cable accommodating device on the upper surface of the spreader. The spreader
A locking portion that locks the spreader and the container,
An operating unit arranged on the upper surface of the spreader and for operating the locking portion,
Further having a bridge portion arranged on the upper surface of the spreader so as to straddle the operating unit.
The spreader anti-vibration device according to claim 1 or 2, wherein the second rope locking portion is provided on the upper surface of the bridge portion.

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