JPS61248826A - Handling gear - Google Patents

Abstract

PURPOSE:To relieve the bending moment imposed on a vertical boom as well as to restrict a rock, by installing a mechanism which holds the vertical boom rockably in a way of making it have proper rocking resistance by rigidity of the vertical boom free of an up-and-down motion or a boom holding device and a lock mechanism. CONSTITUTION:At a central part in a moving direction of a trolley 21, an upper frame 30 of a holding tube 29 of a vertical boom 28 is coupled with the holding tube 29 and the vertical boom 28 free of rocking motion centering on symmetrical shafts 26 and 27, and a hydraulic cylinder 32 is interposed between each arm 31 and the trolley 21. When bending moment is added in a longitudinal direction by inertia at the time of movement of the trolley 21, the holding tube 29 and the vertical boom 28 both rock centering on these shafts 26 and 27, absorbing the bending moment. In addition, a throttle 33 is inserted into a pipe line 35 of the hydraulic cylinder 32, making flow resistance larger, and shaking in a sling load due to a wind is checked. And, an on-off valve 34 is selected to a right position whereby the holding tube 29 and the boom 28 are locked to prevent them from rocking.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention enables cargo handling work to be carried out by lifting and lowering suspended loads through narrow openings (hatches), frames, etc., such as on mixed cargo ships. The present invention relates to a cargo handling device suitable for use when carrying out cargo handling.

(Prior Art) A conventional cargo handling device for loading and unloading cargo on a mixed cargo ship as shown in FIG. The structure is such that a crane is installed, a lifting device is suspended from a winch via a hanging rope, and a load is placed on the lifting device to perform cargo handling (a winch is also used in the case of a link type crane). Due to the use of hanging ropes, under bad weather conditions with winds exceeding a certain wind speed, the suspended load may sway and become dangerous, making it difficult to raise and lower the suspended load through narrow hatches, making cargo handling difficult. There was a problem that it could not be done.

(Problems to be Solved by the Invention) In view of the above-mentioned problems, the present invention seeks to provide a cargo handling device that is capable of carrying out cargo handling work even under windy working conditions.

(Means for Solving the Problems) The cargo handling device of the present invention includes a vertical boom that is movable up and down by a lifting device on a boom holding device supported by a movable body that is moved by human operation, such as a crane. By attaching a lifting device to the lower part of the vertical boom, the hanging load is prevented from swinging due to the rigidity of the vertical boom.

Further, in the present invention, a mechanism for holding the vertical boom in a swingable manner with a suitable swing resistance by a boom holding device, and a locking mechanism for prohibiting swinging are provided, and When the vertical boom is moved horizontally, the locking mechanism is released and the vertical boom is swingably supported to alleviate the bending moment applied to the vertical boom, and when the vertical boom is moved up and down, the locking mechanism is activated. The present invention is characterized in that the vertical boom is raised and lowered vertically by restraining the swinging motion of the vertical boom.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 5. In FIGS. 1 and 2, the portal crane 2 has rails 4, 4 laid along a rock wall 10 at a wharf 3, and left and right carts 6 having wheels 5 rolling on the rails 4, 4. .7, and two pillars 8 and 9 are erected on each truck 6. pillar 8
are connected by a pin 11 at the upper end, and a space is formed between them through which a vertical boom 28 (described later) passes, and the two rear wooden supports 9 are also connected by a horizontal frame 12) and the front Left and right horizontal frames 13 are connected to the support 8 and the rear support 9 and are provided in parallel, and each horizontal frame 13 has a pin 14 at the front end so that it can be raised or lowered as shown by an arrow 16 so that it can take a horizontal or upright position. a horizontal frame 15 attached to the top of the ship so that it can protrude onto the ship; a winch 16 and a wire rope 17 for raising and lowering the horizontal frame 15; and struts 8 and 9.
, a bendable link 18.19 connecting the support column 8 and the horizontal frame 15, respectively, and a rail 20 continuously fixed on the horizontal frame 13.15.

Reference numeral 21 denotes a trolley, and the trolley 21 has a rectangular frame shape as shown in FIG. One end of each of the two wire ropes 24, which are wound and unwound by a winch 23 installed at the rear end (see FIG. 4), is hung over a sheave 25 attached to the front of the horizontal frame 15, and the wire ropes 24 are attached to the front of the trolley 21. and each wire rope 24
By connecting the other end to the rear of the trolley 21 and operating the winch 23, the trolley 21 is moved to the horizontal frame 13.1.
5 can be moved forward and backward.

At the center of the trolley 21 in the direction of movement, there are left and right shafts 26.
．． The upper frame 30 of the holding tube 29 of the vertical boom 28 is connected and supported so that the holding tube 29 and the vertical boom 28 can swing freely around the center 27. Two protruding arms 31 are provided for each arm 31.
A hydraulic cylinder 32 is interposed between the trolley 21 and the trolley 21.

Further, as shown in FIG. 5, the piston upper and lower chambers of each hydraulic cylinder 32 are connected by a conduit 35 having a throttle 33 that provides rocking resistance and an electromagnetically operated lock valve 34. The section 34a is connected to a switch 37 provided in a driver's cab 36 installed at the rear of the crane 2.

As shown in FIG. 4, the lifting device for the vertical boom 28 consists of two wire ropes 39 (in FIG. 4, the wire ropes 39 are one sheave blocks 40 and 41, each of which is rotatably attached to a shaft 26 and 27 supporting the holding cylinder 29, and a vertical boom 2
Sheave blocks 42 and 43 installed on the left and right sides of the lower end of 8
The hook is turned, and the winch 38 is operated to wind up and let out the wire rope 39, thereby lifting the vertical boom 2.
8 is configured to be raised and lowered within the holding cylinder 29, and the terminal end side of each wire rope 39 is connected to a drum 44 that is attached coaxially with the drum 23a of the winch 23, and the wire rope 24 for moving the trolley 21 is connected oppositely to the wire rope 24 for moving the trolley 21. By winding it in the direction and setting the diameter of the drum 44 to an appropriate size,
When the winch 23 is operated to move the trolley 21, the wire rope 39 is wound up or let out, so that the vertical boom 28 does not move up and down when the trolley 21 is moved. Reference numeral 45 denotes sliding guide rollers that are attached to the four corners of the upper frame 30 and lower frame 50 of the holding cylinder 29 and come into contact with the vertical frames 28a at the four corners of the vertical pool 28. 46
is a hook for hanging cargo attached to the lower end of the vertical boom 28.

When loading cargo using this cargo handling device,
The operator in the cab 36 operates the winch 23 to hang the cargo 47 placed on the pier 3 onto the hook 46 as shown by the two-dot chain line 28', and operates the winch 38 to move the vertical boom 28 to the cargo 47. is raised to a height where it does not collide with the ship 1, and then the switch 37 in FIG. 5 is turned off, that is, the piston upper and lower chambers of the hydraulic cylinder 32
3 and the winch 2 in communication via the on-off valve 34.
3 is activated to move the trolley 21 forward until the cargo 47 is located on the hatch la of the ship 1. In this case, if a bending moment is applied to the holding cylinder 29 and the vertical boom 28 in the longitudinal direction due to inertia when the trolley 1 is started or stopped, the holding cylinder 29 and the vertical boom 28
．． By swinging about 27, bending moments are absorbed and damage to the vertical boom 28 is prevented.

Furthermore, even though the vertical boom 28 is swingable, a restriction 33 is inserted into the conduit 35 connecting the upper and lower distal chambers of the hydraulic cylinder to increase the flow resistance of the hydraulic oil. Unlike when using a wire rope, the hanging load (load) 47 will not swing freely due to the wind. After the vertical boom 28 has stopped on the hatch la, turn on the switch 37 and move the on-off valve 34 to the right position. Switch to
Swinging of the holding cylinder 29 and the vertical boom 28 is prohibited, and the winch 38 is operated to lower the vertical boom 28. Then, a worker on the bottom ib or partition plate lc notifies the operator in the cab 36 of the position of the cargo 47 via radio or the like, or detects the landing of the cargo 47 using a load detector or the like and sends a stop signal to the winch 38. As shown at 51 in FIG. 1, the winch 23 can be used as .38 may be remotely controlled, or a driver's cab may be provided on the trolley 21 so that the trolley 21 can be operated while directly viewing the cargo. The cargo that has been lowered to the bottom 1b of the ship is moved to a loading area using a carrier provided on the bottom tb of the ship. To load cargo on the partition plate lc, pass the plate material through the opening 1d between the partition plates lc and unload the cargo onto the plate.When unloading cargo on board, perform the reverse operation to the above. Can be unloaded.

FIG. 6 shows another embodiment of the present invention. In this embodiment, a winch 48 and a hanging rope 49 (of this lifting rope) are used as a lifting device attached to the lower end of the vertical boom 28. According to this embodiment, the hanging load 47 is suspended with the hanging rope 49 lengthened. By lowering it, the vertical boom 28 is prevented from colliding with the ship bottom 1b etc. and damaging the ship bottom etc. upon landing.

The above explanations are based on the case where the crane is a circular crane, but when loading and unloading cargo onto a cargo ship, a double-link horizontal crane is used, which is mainly used for small vessels. The present invention can also be applied to a retractable crane. FIG. 7 shows an example of this, in which a revolving body 63 is installed via a revolving device 62 on a movable body 61 running on the rails 4, 4, and the revolving body 63 can be raised and lowered by pins 64 and 65, respectively. boom 66
．． Attach pin 67 to the tips of both booms 66 and 67.
．． The boom 70 is attached by connecting the intermediate and one end portions of the boom 70 with 69, and the boom 72 is attached to the revolving body 63 so as to be able to rise and fall freely with a pin 71, and the tip of the boom 72 is connected with the pin 73. , and a boom 74 connected to the boom 66.70 by the pin 68, the boom 66, and the pin 64 of the rotating body 63.
．． A boom 75 is connected to the boom 72.74 by a pin 73, and a pin 76.77 is connected between the ends of the boom 75 and the boom 70. The attached holding cylinder 29 constitutes a parallel link mechanism, and when the boom 66 is raised and lowered by a lifting device (not shown), the holding cylinder 29 is moved in the direction of arrow 7.
8, the wire lobe 39, which can be moved horizontally and is wound up and unwound by a winch 79 mounted on the revolving body 63, is hooked onto a sheave 80 coaxially attached to the pin 68, and connected vertically to the holding cylinder 29. A hook is rotated between the vertical boom 28 and a sheep 43 attached to the lower end thereof, and the vertical boom 28 is moved up and down with respect to the holding cylinder 29 by operating a winch 79. 7th
In the case of the embodiment shown in the figure, the rocking suppression mechanism using the hydraulic cylinder 32 etc. shown in FIG. 5 is not necessary.

The present invention can be used not only for loading and unloading cargo onto a cargo ship, but also as a cargo handling device for construction purposes. Other moving bodies that are moved by human operations other than the above can be used.

(Effects of the Invention) As described above, in the cargo handling device of the present invention, a vertical boom is attached to a boom holding device movably supported by a crane or the like so as to be movable up and down by an elevating device, and the lower end of the vertical boom A lifting device is attached to the section, making it possible to carry out cargo handling operations even in strong wind conditions.It also prevents the cargo from shaking, making it easier to load and unload cargo.
The lifting device can be set in an accurate position. Also,
In the present invention, since the vertical boom is swingably attached to the holding device with an appropriate swing resistance, if a bending moment is applied in the front and rear direction due to inertia when starting or stopping the vertical boom, the vertical boom The rocking of the vertical boom absorbs bending moments and prevents damage to the vertical boom.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of a cargo handling device according to the present invention, FIG. 2 is a rear view of the front support of the crane in this embodiment, FIG. 3 is a perspective view of the main parts of the embodiment, and FIG. FIG. 5 is a block diagram showing an example of a means for imparting rocking resistance to the vertical boom rocking of the embodiment, and FIGS. FIG.

Claims (1)

[Claims] 1. A vertical boom is attached to a boom holding device supported by a movable body moved by human operation so as to be movable up and down by a lifting device, and a lifting device is attached to the lower end of the vertical boom. A cargo handling device characterized by: 2. The cargo handling device according to claim 1, wherein the load lifting device comprises a winch and a hanging tool suspended from the winch via a hanging rope. 3. A vertical boom is attached to a boom holding device supported by a movable body that is moved by human operation so that it can move up and down with an elevating device and swingable with appropriate rocking resistance, and the boom is held. A cargo handling device characterized in that the device has a locking mechanism for prohibiting swinging of the vertical boom, and a lifting device is attached to a lower end of the vertical boom. 4. The cargo handling device according to claim 3, wherein the load lifting device comprises a winch and a hanging tool suspended from the winch via a hanging rope.