KR200227764Y1 - device for fixing a boom of a container crane - Google Patents

Abstract

The present invention relates to a boom fixing device of a low-profile container frame, and forms an inlet hole 131 in the shoulder beam 20 to insert the guide cylinder 132, the sensing member 133 formed on the top of the guide cylinder 132 The control unit 130 to position the limit switch 134 to correspond to the control switch 130 to turn on and off the physical signal of the sensing body 133, and the shuttle boom in which the control unit 130 is installed 20 and a cylinder 110 in which the rod 111 is operated downward and the link 112 coupled to the end of the rod 111 is inserted into the inner circumference of the guide cylinder 132. The upper side of the link 112 of the 110 is coupled to the pin 113 to rotate and the lower side guides the fixed arm 120 and a pair of fixed arm 120 is installed roller 121, By configuring the locking groove 141 to be fixed to the locking portion 140 installed in the boom 30, the shaking of the boom Digestion can be safely and accurately handling the container has the effect of suppressing the safety of the operator and the time required to load a container that is, to significantly reduce the cycle time (cycle time) reduce the cost of port operations.

Description

Device for fixing a boom of a container crane

The present invention relates to a boom fixing device of a container crane, and in particular, to secure the crane boom (Crane boom) to support when loading or unloading the container in the port to stop the container by minimizing the shaking of the crane boom The present invention relates to a boom fixing device of a container crane that can stably load and unload.

In general, any work that loads and unloads cargo at a port is called port unloading. According to the boundary of cargo channel, it is divided into onboard loading and offshore loading. Inboard loading refers to loading or loading cargo on ships. This includes the transport of goods to and from the docks and warehouses.

Here, the unloading method varies depending on the type, quantity, size, weight, and nature of the unloading, and the most common method of transporting cargo is unit load unloading using pallets or containers. Unloading work was done using this excellent container crane.

In addition, if there is an airport around the port area, the law restricts the height of the installation, and the trend of the use of container cranes used in ship loading today is low-profile container cranes with low installation height and wide carrying capacity. It began to turn into the preferred trend.

The low profile type container crane is a typical feature of operating in a 4-position system (4-position system) is described as follows.

A shoulder beam to prevent the boom from colliding or interfering with the vessel when the vessel loading the container enters the port where the low-profile container crane is located to unload the container. It is a system that can adjust the stage of boom insertion according to the size of the ship by dividing the stage where the boom supported on the port side into the port side is divided into four stages. In addition, the movement of the boom used in the four-position system can be selectively increased in several stages, which makes the container unloading work accurate and quick.

As shown in FIGS. 1 and 2, the low profile container crane 10 is supported by the shoulder beam 20 and constitutes a boom 30 which is movable in the transverse direction, and is connected to the inside of the boom 30 by a wire rope. Installing the trolley 40 to be moved and the spreader 50 is installed in the lower portion of the trolley 40 is configured to pull the container 60 by moving vertically upward or downward.

The general low-profile container crane 10 first moves the boom 30 supported by the shoulder beam 20 in the transverse direction to position the spreader 50 to the place where the container 60 is located. Then stop. Therefore, when the trolley 40 moving in the boom 30 using the wire rope moves the sprayer 50 precisely in the boom 30 to the place where the container is located and then stops the sprayer ( 50) pulls the container 60 downward by the wire rope and then upwards by the wire rope again.

Here, after the sprayer 50 pulls the container 60, the boom 30 is once again supported by the shoulder beam 20 until the unloading place of the container 60 located in the harbor or ship, and moves to the primary and the boom 30 When the trolley 40 moves the sprayer 50 precisely to the container 60 unloading position and stops, the spreader 50 which pulls the container 60 downwards by the wire rope. (60) will be unloaded at the loading place.

The conventional low-profile container crane 10 has a spreader 50 moved by the trolley 40 when the boom 30 is restrained by the wire rope to remain stationary. Unloading can be done without shaking.

However, such a conventional low profile container crane 10 does not hold heavy weight when the boom 30, which is held stationary by the wire rope, carries a heavy weight container 60. As a result, the phenomenon that the boom 30 was shaken occurred.

In addition, the container 60 is shaken by the strong wind generated due to the peculiarity of the port area, so that the binding force of the boom 30 fixed by the wire rope is frequently dropped, so that the container 60 can be unloaded accurately and quickly. Not done.

As such, the loading and unloading of the container 60 is not progressed smoothly due to the shaking of the boom 30, so that the time required for loading and unloading the container 60 is increased. There is a problem that a lot of costs are added to the operation of the dock.

In addition, there was a big problem that the valuable life is threatened by causing a safety accident by shaking the container (60).

Therefore, the main purpose of the present invention is to improve the safety of the container unloading operation by installing the fixing device for fixing the boom to the shoulder beam of the low-profile container crane to minimize the shaking of the boom.

Another object of the present invention is to maintain the boom firmly according to the unloading position of the container to improve the workability by dramatically reducing the time required for unloading and loading work by proceeding quickly unloading and loading of the container It is.

Another object of the present invention is to suppress the safety accident that may occur due to the shaking of the container.

1 is a side view showing a typical low profile type container crane.

FIG. 2 is a cross-sectional view taken along line A-A showing a boom section of a typical low profile container crane for transporting containers; FIG.

Figure 3 is a side view showing the position where the cram boom fixing device is installed in a low-profile container crane of the present invention.

Figure 4 is an operation state showing the locked off state before the frame fixed boom fixing device of the present invention.

5 is an operation state showing a state in which the cram boom fixing device of the present invention is locked on by fixing the boom.

Explanation of symbols of main parts of drawings

10 container crane 20 shoulder beam

30: Boom 40: Trolley

50: spreader 60: container

100: frame boom fixing device 110: cylinder

111: Load 112: Link

113: pin 114: protective cover

120: fixed arm 121: roller

130: control unit 131: inlet hole

132: guide cylinder 133: sensor

134: limit switch 135: connection ring

137: bracket 140: locking part

141: locking groove 142: seating plate

In order to achieve the above object, the present invention forms an inlet hole in the shoulder beam to inject a guide cylinder and position a limit switch to correspond to a sensor formed on the top of the guide cylinder. A cylinder which is installed perpendicular to the shoulder beam on which the control unit is installed, and which has a rod operated downward and a link coupled to an end of the rod inserted into the inner circumference of the guide cylinder; The lower side is composed of a pair of fixed arms that can be rotated by a pin and a roller is installed, and a locking part provided on the boom with a locking groove for guiding and fixing the fixed arms. .

When described in detail with reference to the accompanying drawings a preferred embodiment of the present invention configured as described above are as follows.

Figure 3 is a side view showing the position where the cram boom fixing device is installed in the low-profile container crane of the present invention, Figure 4 is an operating state diagram showing the locking off state before the fixed boom fixing device of the present invention is fixed; , Figure 5 is an operation state diagram showing a lock-on state in which the cram boom fixing device of the present invention fixed the boom.

As shown in FIGS. 3 and 4 and 5, the present invention forms an inlet hole 131 in the shoulder beam 20 to embed the guide cylinder 132 and to detect the sensing member 133 formed on the top of the guide cylinder 132. The control unit 130 to position the limit switch 134 to correspond to the control switch 130 to turn on, off the physical signal of the sensing body 133, and the shoulder beam is provided with the control unit (130) 20 and a cylinder 110 in which the rod 111 is operated downward and the link 112 coupled to the end of the rod 111 is inserted into the inner circumference of the guide cylinder 132. The upper side of the link 112 of the 110 is coupled to the pin 113 to rotate and the lower side guides the fixed arm 120 and a pair of fixed arm 120 is installed roller 121, The locking groove 141 to be fixed is configured by a locking unit 140 installed in the boom 30.

In addition, the guide cylinder 132 is connected to the link 112 by connecting the inner circumferential surface of the guide cylinder 132 and the fixed arm 120 into the link ring 135 in the inlet hole 131 of the shoulder beam 20. Allow it to work together.

Here, by installing the bracket 137 on the outer periphery of the guide cylinder 132 embedded in the inlet hole 131 of the shoulder beam 20 to guide the up and down motion of the guide cylinder 132 to achieve straightness. To be able.

Further, the sensing body 133 interlocked by the guide cylinder 132 is attached without being interfered by the shoulder beam 20.

In addition, the cylinder 110 is preferably installed to protect the protective cover 114.

At this time, the inner upper side of the protective cover 114 is coupled to the upper side of the cylinder 110 which is fixed vertically to the pin 113 so that the cylinder 110 around the pin 113 can be changed slightly.

In addition, the locking groove 141 of the locking unit 140 is curved symmetrically to the left and right walls so that the rollers 121 of the fixed arm 120 can be guided and stabilized, respectively.

Here, the mounting plate 142 is formed in the center of the locking portion 140 provided in the boom 30.

Referring to the operation of the present invention is as follows.

First, when the low profile type container crane 10 tow the container 60 loaded on the ship and unload the container at the loading position of the harbor, the crane boom fixing device 100 locks on or locks off the boom 30. A brief description of the operating point is as follows.

First, the low-profile container crane 10 located in the port moves the boom 30 to the land side to prevent the container vessel from colliding with the boom 30 before the container vessel enters the harbor, and then the crane boom fixing device 100 By switching to a locked on state so that the boom 30 can be fixed.

When such a container ship enters and docks at a port, the boom 30 supported by the shoulder beam 20 of the low profile container crane 10 can move the spreader 50 to the position of the container 60. The boom 30 is moved to the locking-off state by releasing the boom 30 by the crane boom fixing device 100 so that the boom 30 can move the spreader 50 to the position of the container 60 loaded on the ship. do.

After the boom 30 moves to the position of the container 60 and stops, the crane boom fixing device and the boom 30 are locked and locked so that the trolley 40 moves and stops inside the boom 30. After using the spreader 50 is to work to tow the container.

As such, when the low profile container crane 10 tow the container 60 loaded on the ship to unload to the port unloading place, the crane boom fixing device 100 moves the boom 30 as described above. After stopping to switch to the lock-on state and then maintain the restraint force when the trolley 40 moves inside the boom 30 so that the sprayer 50 moves downward or upward to tow the container boom 30. ) Is fixed without shaking so that the unloading operation of the container 60 can be quickly and accurately.

As shown in FIG. 4, the situation in which the boom 30 fixed by the cram boom fixing device 100 is switched to the locking-off state from the locking-on state will be described in detail as follows.

First, in order to release the shoulder beam 20 and the boom 30 from the driver's seat, the cylinder boom commands the release signal to the boom fixing device 100 to release the link 112 through the rod 111. It is raised upwards.

At this time, each of the rollers 121 seated at the left and right ends of the locking groove 141 by the fixed arm 120 coupled with the link 112 to the shoulder beam 20 is provided in the locking groove 141. The guide is moved upward along the link 112 while moving toward the center.

As such, when the link 112 upwardly by the cylinder 110 enters the inlet hole 131, the fixed arm 120 coupled to the link 112 is completely separated from the boom 30. In addition, the guide cylinder 132 which is connected to the fixed arm 120 and the connecting ring 135 to interlock is moved upward to improve the up and down straightness of the link 112 and the fixed arm 120.

As such, when the fixed arm 120 is completely removed from the boom 30 and inserted into the inlet hole 131 of the shoulder beam 20, the sensing member 133 fixed to the guide cylinder 132 is a shoulder beam ( 20) by being physically connected to the upper limit switch 134, the crane driver's seat is switched to the operation standby release state that can move the boom 30 in the shoulder beam 20.

In addition, as shown in FIG. 5, the situation in which the boom 30 is switched to the locking on state from the locking off state to the shoulder beam 20 by the cram boom fixing device 100 will be described in detail as follows.

In order to fix the boom 30 in the crane driver's seat first, when the fixed signal is commanded to the cram boom fixing device 100, the cylinder 110 pushes the rod 111 toward the lower side and is formed at the end of the rod 111. The fixed arm 120 coupled to the link 112 is gradually downward from the inlet hole 131 of the shoulder beam 20.

At this time, when the roller 121 of the downward fixed arm 120 is seated in the locking groove 141 of the locking unit 140, the pair of fixed arms 120 are respectively left and right around the link 112. The roller 121 is opened while being rotated, and the roller 121 is guided to the locking groove 141 to be seated while being in close contact with both ends of the locking groove 141 naturally curved symmetrically to the left and right sides of the locking unit 140.

As such, when the boom 30 is fixed by the fixing arm 120 supporting the roller 121 seated in the locking groove 141, the cylinder 110 maintains an appropriate pressure to continuously fix the boom 30. To make it possible.

Here, when the fixed arm 120 is lowered by the cylinder 110, the limit switch 134 is short-circuited with the sensing body 133 of the guide cylinder 132 interlocked with the fixed arm 120, and the boom 30. By switching to the operating standby state, the boom 30 in the container crane driver's seat is switched to a state that can not move.

In addition, the cylinder 110 which is vertically embedded in the protective cover 114 and coupled to the pin 113 may move while being rotated by a predetermined amount in the protective cover 114 about the pin 113 so that the fixed arm ( Even if 120 is not correctly seated in the locking groove 141, the fixing deviation may be reduced by the pin 113 coupling.

Furthermore, in FIG. 4, when an external force is applied to the boom 30 fixed by the cram boom fixing device 100, the roller 121 is pushed by the locking groove 141 of the boom 30 to be biased. As the fixed arm 120 is bent downward with respect to the link 112, a phenomenon in which the binding force of the boom 30 is released by pushing the link 112 upward by the fixed arm 120 occurs.

In order to prevent this phenomenon, when the frame boom fixing device 100 is locking on the boom 30, the locking groove in which the roller 121 is seated at the position of the link 112 seated on the seating plate 142 ( Place the height lower than 141). That is, even if an external force is generated in the boom 30 by lowering the center of the link 112 lowered by the cylinder 110 than the center of the roller 121 seated in the locking groove 141, a pair of fixed arms Since the 120 is not bent downward with respect to the link 112, the roller 121 is kept seated in the locking groove 141 to prevent the binding force of the boom 30 from being released.

In addition, one crane boom on the shoulder beam 20 so that the crane boom fixing device 100 of the low-profile container crane 10 can be applied to a four-position system which is a representative feature of the low profile container crane 10. By installing the fixing device 100 and selectively installing a plurality of locking parts 140 on the boom 30, the boom 30 can be fixed step by step in various lengths to carry more precise and accurate containers 60. Let work be done.

As described above, the present invention forms an inlet hole 131 in the shoulder beam 20 to insert the guide cylinder 132 and to correspond to the sensing body 133 formed on the upper end of the guide cylinder 132 (limit switch ( 134 is positioned so that the physical signal of the sensing body 133, the limit switch 134 is turned on, off and perpendicular to the inlet hole 131 of the shoulder beam 20, but the rod ( A cylinder 110 in which the link 112 coupled to the end of the rod 111 is inserted into the inner circumference of the guide cylinder 132, and the upper side of the link 112 is pin 113. And a pair of fixed arms 120 having a roller 121 installed thereon, and a locking groove 141 for guiding and fixing the fixed arms 120 to the boom 30. By configuring the locking portion 140, the operator can be safely and accurately unloading the container by minimizing the shaking of the boom It has the effect of suppressing the accident and to significantly reduce the time, that is, the cycle time (cycle time) it takes to load the container reduce the cost of port operations.

Claims (3)

A shoulder beam 20 in which the inlet hole 131 is vertically drilled and the guide cylinder 132 is embedded in the inlet hole 131, The limit switch 134 is positioned to correspond to the sensing body 133 formed on the upper end of the guide cylinder 132 of the shoulder beam 20 so that the limit switch 134 is turned on or off. The control unit 130, The control unit 130 is installed vertically above the inlet hole 131 of the shoulder beam 20 is installed, so that the rod 111 is operated downward and the link 112 is coupled to the end of the rod 111 A cylinder 110 coupled to the left and right pairs of the fixed arm 120 coupled to the inner side of the guide cylinder 132 and having the roller 121 coupled to the lower side of the embedded link 112, Boom fixing device of the container crane (10), characterized in that the locking groove 140 for guiding and fixing the fixed arm (120) comprising a locking portion (140) installed on the boom. The method of claim 1, Locking groove 141 of the locking unit 140 is a boom fixing device of a low-profile container, characterized in that the roller 121 is guided symmetrically curved left and right walls so that it can be seated stably The method of claim 1, The guide cylinder 132 is interlocked with the link 122 by connecting the inner circumferential surface of the guide cylinder 132 and the fixed arm 120 into the link ring 135 in the shoulder beam 20, the inlet hole 131. Boom fastener of low profile container, characterized in that configured to be.