JPS6332718B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a Gyles Derrick device.

Conventionally, for example, a derrick device in which the boom is swung by a guy has been used to handle cargo handling hoses on tankers, but since operating the boom of this derrick device requires several workers, one-man control is recommended. Possible gearless derrick device, i.e. boom a as shown in FIG.
A simple derrick device has been proposed in which the base of the boom a is mounted so as to be able to rise and fall at the center of rotation of a turntable c provided on the side of a post b, and the boom a is rotated by rotating the turntable c with a rotation cylinder d. There is. However, in this Gyles Derrick device, the turntable c is installed on the side of the base of the post b, so the diameter of the turntable c cannot be increased, and it takes a long time to turn the turntable c and the boom a. A turning driving force is required, and a large-sized turning cylinder d is required. Further, since the turning force is transmitted to the lower end of the boom a to turn the boom a, a large stress is generated at the lower end of the boom a. Therefore, it is necessary to reinforce this part, but if you try to give it sufficient strength,
There was a problem in that the Gyles derrick device was as expensive as a crane and was unsuitable for use in cargo handling hose handling on tankers, which is used less frequently than cranes on cargo ships.

The present invention addresses the above-mentioned problems, and includes a post, a boom whose lower end is attached to the post so as to be able to rotate and raise and lower, a ring support arm fixed to the post, and a boom using the ring support arm. A swing ring supported so as to be able to swing around a swing center, a ring swing drive device for swinging the swing ring, and a pair of first and second stays, each of which has a , the lower end of the second stay is attached to a symmetrical position on the swivel ring that sandwiches the center of elevation of the boom so that it can be elevated about an imaginary line passing through the center of elevation of the boom, and the upper end of the first stay The second stay is attached near the bottom of the boom, and the upper end of the second stay is detachably attached to the middle of the boom. The swing drive device can be made smaller. Another object of the present invention is to provide an improved gyles derrick device that does not require reinforcement of the base end of the boom like a crane.

Next, the gyles derrick device of the present invention will be explained with reference to an embodiment shown in FIGS. 2 to 6. 1 is a post installed upright on the upper deck of a ship, and 2 is a side surface of the upper end of the post 1. 2' is a mounting bracket that is rotatably attached to the bracket 2, 7 is a hanging rope pulley attached to the mounting bracket 2', and 3 is a topping bracket that projects from the side of the base end of the post 1. 3' is the mounting bracket attached to the gooseneck bracket 3, 4 is the boom, and the lower end of the boom 4 is pivoted to the mounting bracket 3' (see reference numeral 4a).
and elevation (see reference numeral 4b). Note that the pivot center of the mounting bracket 2' and the pivot center 4a of the boom 4 are on the same vertical line. Reference numeral 5 denotes a loading rope pulley attached to the lower part of the gooseneck bracket 3, 7' a suspension rope pulley, 8, 8' a loading rope pulley, 9 a suspension rope for raising and lowering the boom 9, and 10 A loading cable 12 is a plurality of ring support arms protruding radially from the base end of the post 1, and 11 is supported by the distal end of each support arm 12 to enable the boom 4 to rotate about the pivot center 4a. 11a is a large number of rack pins provided at equal intervals on the outer circumference of the swivel ring 11, 12a is a vertical support roller that supports the swivel ring 11 so that it does not move in the vertical direction, and 12b is the swivel ring. 11
The rollers 12a and 12b support the support arm 1 so that it does not move laterally.
It is attached to 2. Further, 13 is a support base attached to the tip of the arm 12, 16 is a pinion drive device installed on the support base 13, and 17 is the drive device 16.
The pinion 17 is in mesh with the rack pin 11a of the swivel ring 11. Reference numerals 14 and 14 designate first stays having a rigid structure, and the lower ends of each of the first stays 14 are placed at symmetrical positions of the swivel ring 11 sandwiching the elevation center 4b of the boom 4, centered on an imaginary line passing through the elevation center 4b. The upper end of each first stay 14 is fixed near the base end of the boom 4 (see eye plate 14a). Also, 15,15 is the second
The lower end of each of the second stays 15 is detachably attached to the vicinity of the lower end of each of the first stays 14, and the upper end of each of the second stays 15 is detachably attached to the middle of the boom 4. (See eye plate 15a).

Next, the operation of the Gyles Derrick device will be explained. The operation of each element during loading is no different from that of a normal derrick, and the unloading cable 10 is wound up by a driving winch (not shown) and the unloading pulley 8' is raised to unload the load. , boom 4
The lifting and raising of the suspension rope 9 is also carried out by winding up or letting out the suspension rope 9 using a driving winch (not shown) and displacing the suspension rope pulley 7'. Also, the rotation of boom 4 is
The pinion 17 engaged with the rack pin 11a of the swing ring 11 is driven by the pinion drive device 16, and the swing ring 11 is moved between the vertical support rollers 12 and 12.
a and the lateral support roller 12b while rotating. At this time, the turning ring 11 causes the first stay 14 and the second stay 15 to also turn together with the boom 4. When the boom 4 is elevated around the elevation center 4b, the first and second stays 14, 15
He looks down as well.

The gyles derrick device of the present invention is constructed as described above, and since the swivel ring 11 is attached so as to surround the base end of the post 1 via the ring support arm 12, the diameter of the swivel ring 11 can be reduced. It can be made larger without interfering with various barge products on the upper deck, and a large swing driving force is not required to swing the swing ring 11 and boom 4, and the ring swing drive devices 16 and 17 can be made smaller. . In addition, the turning force of the turning ring 11 is
4, the base end of the boom 4 does not need to be reinforced like a crane. Furthermore, when the turning ring 11 is started or stopped, a bending moment acts on the boom 4 due to inertia, but the middle part of the boom 4 and the vicinity of the lower end of the first stay 14 are connected via the second stay 15. There is an effect that the bending moment due to the above-mentioned inertial force is not applied to the boom 4.

The winch that drives the sling 9 and the unloading line 10 is installed on the upper deck or on a platform near the base end of the post 1, but the latter allows the equipment to be integrated and can be installed on the upper deck. becomes easier. Moreover, as a winch for driving the hanging rope 9 and the unloading rope 10, a single winch having two sets of drums coaxially provided can also be used. Also, the pinion drive device 16
is installed on the upper deck and connected to pinion 1 via a chain.
7 may be driven. Also, by gathering the control stands for each winch in one place, one-man control becomes possible. Further, a portion 11b of the swing ring 11 directly below the boom 4 can be removed when the tip of the boom 4 is lowered onto the upper deck to inspect a pulley or the like provided at the top. At this time, it is necessary to remove the upper end portion of the second stay 15 from the eye plate 15a.

Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments, and that various design changes can be made without departing from the spirit of the present invention. .

[Brief explanation of the drawing]

FIG. 1 is a side view showing a conventional Guyless derrick device, FIG. 2 is a side view showing an embodiment of the Guyless derrick device according to the present invention, FIG. 3 is a plan view thereof, and FIG. 4 is a perspective view thereof. 5 is a plan view of the ring rotation drive device, and FIG. 6 is a longitudinal sectional side view thereof. DESCRIPTION OF SYMBOLS 1...Post, 4...Boom, 4a...Turning center of boom 4, 4b...Elevation center of boom 4, 11...Swivel ring, 14...First stay, 15...Second stay.

Claims (1)

[Claims] 1. A post, a boom whose lower end is attached to the post so that it can rotate and elevate, a ring support arm fixed to the post, and a boom that is supported by the ring support arm so that it can rotate around the center of rotation of the boom. a swing ring, a ring swing drive device for swinging the swing ring, and a pair of first and second stays, each of which has a lower end portion of the first and second stays that can be used to raise and lower the boom. The first stay is mounted at a symmetrical position on the slewing ring sandwiching the center so that the boom can be tilted about an imaginary line passing through the center of the boom, and the upper end of the first stay is mounted near the bottom of the boom. A gairless derrick device characterized in that the upper end of the two stays is detachably attached to the middle part of the boom.