JPS634062Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial technical field The present invention relates to a marine derrick. More specifically, the present invention relates to a marine derrick used for cargo handling between a cargo hold provided in a ship's hull and a shore or barge.

Prior Art and Problems Japanese Utility Model Application Publication No. 51-133993 describes a structure in which two slings are stretched between the outrigger at the top end of the derrick post and the top end of the derrick boom on both sides, one end of each sling is connected to a separate drum of the guy winch that rotates in the opposite direction to each other and is led upward.
Separate pulleys 10, 11 at both ends of the outrigger, separate pulleys 5, 6 at the top end of the derrick boom, separate pulleys 12, 15 at the center of the outrigger,
The other end of the boom is connected to a topping winch via separate pulleys 7 and 8 at the top of the boom and separate pulleys 13 and 14 at the center of the outrigger.
It is considered that the sling part hung on the pulleys 7, 8 at the top of the boom acts as a topping lift, and the sling part hung on another set of pulleys 5, 6 acts as a guy wire. However, the length of the out rigger is quite short compared to the width of the ship. Also, the tension applied to the pulleys 5, 6 at the top of the derrick boom is applied much closer to the vertical center plane of the ship than the sling parts 16, 17 (see Figure 2) located at the outermost positions, so the moment that pulls the top end of the derrick boom to the ship side is greatly reduced. Therefore, the sling described in this publication has little effect in swinging the derrick boom to the ship side, making the outreach of the derrick boom insufficient.

Japanese Patent Application Laid-Open No. 52-88957 describes two suspension lines 5 and 6 stretched between both ends of an outrigger 9 attached to the upper end of the derrick post 1 and the tip of the derrick boom, as well as each suspension line. Winches 7, 8 are shown for winding the cable. The customary topping lift and winch for hoisting it have been completely eliminated. Therefore, in the present invention, the derrick boom is raised, raised, and rotated by means of incomplete guy wires attached to both sides of the upper end of the derrick post. In this invention, both when swinging the derrick boom to the left and right sides and when lifting it up and down, it is necessary to place a person on each winch 7 and 8 and operate both winches so that they work together. It wastes time and effort to operate.

Japanese Patent Publication No. 6-91483 shows a derrick equipped with two topping lifts led from both ends of an outrigger provided at the upper end of the derrick post to the upper end of the derrick boom. Similar two topping lift derricks are shown in British Patent No. 958508 and British Patent No. 1146392. Although these prior technologies strengthen the topping lift, they omit the guy wire, which limits the horizontal swinging movement of the top of the derrick boom, which limits the ability to swing the top of the derrick post while berthing. It becomes difficult to place it on the top of the quay.

Japanese Patent Publication No. 43-5788 discloses the idea of stabilizing the movement of a derrick boom by connecting a topping lift and a guy wire. Similar dericks are also shown in Utility Model Publication No. 45-9131 and Japanese Patent Publication No. 46-38297. However, because these prior art techniques use special fittings to connect the topping lift and the guy lift, these fittings prevent the topping lift from moving smoothly on its pulleys, resulting in poor material handling. There is a risk of hindering implementation.

Purpose of the invention The purpose of the invention is to
The object of the present invention is to obtain a marine derrick that improves the efficiency and safety of boom operation by using two separate continuous wires that act as wires.

Another object of the present invention is to provide a marine derrick equipped with guy wires that can be hung neatly on designated pulleys at all times without being dragged on the deck during cargo handling.

The above object of the present invention is to provide a marine derrick consisting of a derrick boom rotatably attached to a derrick post at one end by a gooseneck, in which two booms are arranged approximately symmetrically on both sides of the derrick post.
A topping lift and guy wire consisting of two separate continuous wires W1, W2 is provided, each wire W1, W2 connected at one end to a respective topping winch TW and led upwardly to the upper end of the derrick post. Separate pulleys T1, T attached
4. A topping lift portion formed by a separate pulley T2, T5 mounted on the opposite end of the derrick boom, and a separate pulley T3, T6 on the derrick post, respectively said separate pulley T3. , respective first pulleys G1 on guy posts GP1, GP2 guided downward from T6 and erected in order on both sides of said derrick post,
G4, a separate pulley G2, G5 mounted on the opposite end of the derrick boom, and a respective second pulley G3, G on said guy post GP1, GP2.
According to the marine derrick of the present invention, the marine derrick of the present invention is characterized in that it is provided with a guy wire part formed by being connected to a guy winch GW that takes out one wire when winding up the other wire after passing through 6. achieved.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the device of the present invention will be described below with reference to an embodiment shown in the accompanying drawings.

Referring to Figures 1A and 1B, there is shown a derrick post with an outrigger attached to its upper end and a derrick boom rotatably attached to a portion adjacent to the lower end of the derrick post via a gooseneck. A topping winch TW and a guy winch are located adjacent to the lower end of the derrick post.
GW is attached to the deck. Topping・
Winch TW rotates in the same direction at the same speed2
The guy winch GW is a twin-hulled type with two drums TW1 and TW2, but it has two drums GW1 and GW that rotate in opposite directions.
It is equipped with 2. A pair of guy posts GP1 and GP2 aligned in the ship's width direction at the lower end of the derrick post.
are built on both sides of the deck. Derek
The post has a first pulley T1 and a second pulley attached to the part adjacent to one end of the outrigger (the left end in Figure 1).
It is equipped with a pulley T3. At the opposite end (right end) of the outrigger are the first pulley T4 and the second pulley T on the opposite side.
6 is attached. Adjacent to the upper end of the derrick boom and facing the outriggers on the derrick post, the derrick boom has a pair of pulleys T2 for passing the topping lift portion of the topping lift/guy wire device of the present invention, which will be described below. T
5, and further includes guy pentands GPD1 and GPD2 attached to both sides adjacent to the upper end of the boom. Each guy pendant GPD1, GPD
Pulleys G2 and G5 are attached to the lower ends of 2, respectively. Each guy post GP1, GP2 has a pair of pulleys G1, G3, G4, G6 attached to its upper end, respectively.

The boom control mechanism of the present invention includes a pair of continuous topping lift/guy wires W1 and W2 arranged symmetrically with respect to the longitudinal center plane of the hull passing through the vertical center line of the derrick post. . 1
The pair of continuous wires W1, W2 differ only in the direction in which they are wound around the drums GW1, GW2 of the guy winch GW, respectively, and are used in various types of wires placed at the upper ends of derrick posts, derrick booms, and guy posts, etc. The manner in which it is hung on a pulley is the same. In addition, if necessary, a guiding pulley (leading block) is provided at the appropriate location for each wire W1, W2.
Makes running easier.

The topping lift/guy wire W1 is anchored and wrapped around one drum TW1 of the topping winch, and then guided upward to the first pulley T1 adjacent to the upper end of the derrick post,
A pulley T2 at the top of the boom and a second pulley T3 adjacent to the top of the derrick post.
The wire W1 was suspended from the top of the derrick boom, forming a topping lift portion of the wire W1, and then directed diagonally downward and guided to the guy post GP1, which was suspended from the first pulley G1 at the top of the guy post and from the top of the derrick boom. After forming the guy wire section that hangs from the pulley G2 attached to the lower end of the guy pendant GPD1 and the second pulley G3 at the upper end of the guy post GP1, attach it to one drum GW1 of the guy winch GW on the deck. It is rolled up. Similarly, the other topping lift/guy wire W
2 is the drum TW of the topping winch on the deck
2 and hung on a first pulley T4 adjacent to the upper end of the derrick post, a pulley T5 adjacent to the upper end of the derrick boom, and a second pulley T6 adjacent to the upper end of the derrick post, forming a topping lift portion. The first pulley G4 on the guy post GP2 is then directed downward and guided to the guy post GP2 on the opposite side, and the pulley G5 is attached to the lower end of another guy pentand GPD2 hanging from the upper end of the derrick boom. , as well as Guy Post GP2
The guy wire section is hung from the second pulley G6 attached to the upper end, and then the guy winch
Said continuous wire W1 to another drum GW2 of GW
It is wound in the opposite direction. Therefore, when one wire W1 is wound up by the guy winch GW, the other wire W2 is taken out from the guy winch GW.

During operation, both wires W1 and W are pulled in or out by the topping winch TW.
2 move forward and backward at the same time to raise and lower the boom, and the operation of the guy winch winds up one guy wire and releases the other wire, causing the boom to swing. When both winches are operated at the same time, the boom can be raised, raised and turned at the same time.

FIG. 1C shows the winch of the embodiment described above,
An application example is shown in which the various components such as goosenecks and pulleys are compactly arranged and centrally placed on a workbench on a derrick post. Such an arrangement simplifies installation in shipyards and facilitates operation by workers.

Figures 2A and 2B show a modified embodiment of Figures 1A and 1B in which the wire W1 runs from the second pulley T3 adjacent the top of the derrick post to the guy post.
This differs from the embodiment shown in Figures 1A and 1B only in that it is not guided directly toward GP1, but instead is suspended from the topping and guide pulley TG1 on the derrick boom and then guided to the pulley on the guy post GP1. differ. Therefore, the continuous wire W1 is shown in symbols as follows.

TW1-T1-T2-T3-TG1-G1-G
2-G3-GW1 and the other continuous wire W2 are similarly introduced and are shown in symbols as follows.

TW2-T4-T5-T6-TG2-G4-G
5-G6-GW2 The embodiments shown in FIGS. 2A and 2B are effective when a large force is required on the guy wire portion.

FIG. 2C shows an applied example in which the components installed in the embodiments of FIGS. 2A and 2B are mounted on a workbench on a derrick post.

Figures 3A, 3B, and 3C are double toppings.
This shows the conventional technology for lift-type marine derricks.

Figures 4A, 4B, and 4C show a prior art marine derrick in which a topping lift and a guy wire are connected using metal fittings.

Effect of invention The effects of the device of the present invention are as follows.

(1) The swinging out of the boom on the side can be increased to prevent arbitrary movement of the boom such as sideways movement or rising, improving the stability of the boom.

(2) Since the guy wires extend out on both sides, the outriggers on the derrick posts can be shortened.

(3) Improved boundaries from the bridge, improving ship stability and reducing radio interference.

(4) Many of the pulleys are located in low places, which is advantageous for maintenance and inspection.

(5) Since there are two topping lifts, there is no risk of serious disaster even if one topping lift breaks.

(6) The loosening of one part of the wire during the swinging of the derrick boom is automatically absorbed by another part of the wire.

(7) Each wire is a single, consistent, continuous wire that passes smoothly through the pulley without knots or connecting metal fittings, and there are no problems such as congestion or collisions.

(8) Since each continuous wire passes smoothly through the pulley, there is no uneven wear and the service life is improved.

(9) Each continuous wire does not have any connecting fittings or knots, so no noise is generated during operation.

[Brief explanation of the drawing]

Fig. 1A is a plan view showing an embodiment of the device of the present invention, Fig. 1B is a perspective view of the device of Fig. 1A, and Fig. 1C is a perspective view of the device of Fig. 1A.
The figures are a perspective view showing an application of the embodiment of Fig. 1A;
Figure A is a plan view showing a modification of the embodiment shown in Figure 1A, Figure 2B is a perspective view of the modified embodiment shown in Figure 2A, and Figure 2C is a perspective view of the modified embodiment shown in Figure 2A.
The figure is a perspective view showing an application of the apparatus of figure 2A, and figure 3A.
The figure is a perspective view showing an example of the previous device (Japanese Patent Publication No. 6-91483), Figure 3B is a perspective view showing another example of the previous device (British Patent No. 1146392), and Figure 3C is a perspective view of still another example of the previous device. A perspective view showing an example (British Patent No. 958508), Figure 4A is a perspective view showing an example of the previous single topping method (Japanese Patent Publication No. 43-5788),
Figure 4B is a perspective view showing another example of the conventional single topping method (Japanese Patent Publication No. 45-9131).
Figure C is a perspective view showing yet another example of the conventional single topping method (Japanese Patent Publication No. 38297/1983).

Claims (1)

[Scope of utility model registration request] In a marine derrick consisting of a derrick boom rotatably attached at one end to a derrick post by a gooseneck, a topping lift consisting of two separate continuous wires W1, W2 arranged approximately symmetrically on either side of the derrick post. A separate pulley T1, T4 is attached to the upper end of the derrick post, opposite the derrick boom, with a pair of guy wires, each wire W1, W2 connected at one end to a topping winch TW and led upwards. separate pulleys T2, T5 mounted at the ends;
and a separate pulley T3 on the derrick post,
a topping lift section formed over T6 and a respective one on guy posts GP1, GP2 led downwardly from said separate pulleys T3, T6 respectively and erected broadside on each side of said derrick post in turn; First pulleys G1, G4, separate pulleys G2, G5 attached to opposite ends of the derrick boom
Also, after passing through the respective second pulleys G3 and G6 on the guy posts GP1 and GP2, a guy winch GW is formed to be connected to a guy winch GW that takes out one wire when winding up the other wire.
A marine derrick characterized by comprising a wire portion.