JPS63165290A - Piping to fluid drive of expansion type crane nose section - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Industrial Application> The present invention is applicable to the crane itself, such as a telescopic marine crane that operates with a net-lifting device attached to the tip of a round barge. This relates to piping for a fluid drive device.

<Conventional technology> There are many cranes, not just marine cranes, that have various hydraulic devices attached to the tip of the crane, but in these types of cranes, the hydraulic piping to the hydraulic device at the tip requires a margin for the maximum extension of the crane. Currently, the additional length of high-pressure rubber hose is suspended via a hose suspension/guidance guide attached to the outside of the crane boom. Therefore, when the crane is shortened, the high-pressure rubber hose greatly hangs down from the crane boom, causing the hose to catch on surrounding objects and causing damage, as well as reducing work efficiency.

<Problems to be Solved by the Invention> An object of the present invention is to provide a telescoping crane that uses telescoping piping that expands and contracts in response to the expansion and contraction of the crane boom, thereby eliminating the problem of the prior art in which a high-pressure rubber hose sag. shall be.

Means for Solving the Problems〉 The gist of the piping of the present invention that achieves the above object is to provide piping for a crane boom in which one or more telescopic booms are telescopically inserted into the outermost main boom. A pair of independent outer tubes running along the length of the boom are fixed to the outside of the boom,
One or more telescopic tubes are sequentially telescopically inserted into each of the outer tubes, and the tip of the innermost telescopic tube among the telescopic tubes is inserted into the tip of the innermost telescopic boom of the telescopic boom. This is piping for a fluid drive device at the tip of a telescoping crane, characterized in that it is connected and fixed to the outer tube and is configured to conduct fluid between the base end opening of the outer tube and the tip opening of the telescoping crane.

Note that the fluid drive device here refers to a device driven by fluid pressure, such as a hydraulic device or a pneumatic device.

Also, between the main boom and the telescopic boom in the crane boom,
Alternatively, in the piping of the present invention, the expression that the outer tube and the telescopic tube are sequentially inserted telescopically refers to a configuration in which they are combined with each other, such as a pull-out fishing rod or antenna. do.

In addition, in the present invention described above, in order to drive one fluid drive device, a pair of outer pipes are arranged for the fluid supply side and the fluid discharge side, but it is not possible to arrange a drain drain pipe in the same way. Of course, if there are multiple fluid drive devices, the number of outer tubes can be made into multiple pairs accordingly.

<Embodiments and Operations> The piping for the fluid drive device at the tip of the telescoping crane of the present invention will be described in detail below with reference to drawings showing embodiments thereof.

This example was carried out with respect to a telescoping marine crane mounted on a purse seine fishing boat and used for lifting nets and cargo handling operations. That is, as shown in Fig. 1, the base end of the crane boom (2) is pivotally attached to the upper end of the rotating frame (1), and the crane boom (2) is inserted into the main boom (2-1). It consists of a two-stage mechanism of a telescopic boom (2-2), which is made telescopic by an internally built telescopic cylinder (3), and can be raised and raised by an elevating cylinder (4). This marine crane has a cargo handling winch (5) and an abacus lifting winch (6) for normal cargo handling operations, and a lifting net operated by a hydraulic motor (7) at the tip of the telescopic boom (2-2). Machine (8) is installed. For such a marine crane, a pair of outer tubes (9), (9) are attached to the outside of the main boom (2-1) so as to run along the longitudinal direction of the main boom, as shown in Figure 2. Fixed through the seat (10) and outside each one! (
9), expand and contract within (9) respectively! (11), (11
) was inserted telescopically. The details are shown in Figure 3.
A metal (12) and a seal ring (13) are attached to the outer periphery of the proximal end of the extensible tube (11) to seal fluid and prevent dust from entering. )
It was welded and fixed to the telescopic boom (2-2) via the.

Then, the proximal opening of the outer tube (9), (9) and a hydraulic power source (not shown) are communicated with a high pressure rubber hose (not shown), allowing it to expand and contract! The tip openings of (11) and (11) were connected to the oil supply port and oil discharge port of the hydraulic/pressure motor (7), respectively, through high pressure rubber hoses (15) and (15).

In the piping of this embodiment, if the crane boom (2) is extended or contracted to a length suitable for the work during net lifting work, the telescopic pipe will automatically follow the extension or contraction of the telescopic boom (2-2) in that case. (11) moves in and out of the outer tube (9) and is always fixed along the outside of the crane boom (2), making various operations extremely easy (and efficient).

As described above in detail with respect to the embodiments, in the piping for the fluid drive device at the tip of the telescoping crane of the present invention, the fluid conduit tube itself for supplying and discharging fluid is extended and contracted in response to the expansion and contraction of the crane boom. Since the pipe and telescoping pipe have a telescopic structure, and the outer pipe is fixed to the outside of the crane boom, the total length of the outer pipe or telescoping pipe is always the minimum required length, and it is close to the outside of the crane boom. It is something that can be located. - <Effects of the Invention> As stated above, according to the present invention, the high-pressure rubber hose, which in the past would not only sag greatly when the crane boom retracted, reducing work efficiency, but also easily break, can be improved. The Daimaru uses an outer tube that expands and contracts in response to the expansion and contraction of the crane boom, and an extensible tube that is inserted inside the outer tube, so the tip of the extensible tube can be connected directly or with a very small length of high-pressure rubber hose. By communicating with a fluid drive device such as a hydraulic motor, it is possible to eliminate problems such as getting caught on other objects during work, making it less likely to be damaged and making the work itself more efficient.
Furthermore, it is useful for improving the aesthetic appearance of the crane itself.

[Brief explanation of the drawing]

Fig. 1 is a side view of one embodiment of the present invention, and Fig. 2 is a side view of an embodiment of the present invention.
FIG. 3 is an enlarged end view taken along line -■, and a cross-sectional side view of essential parts of an embodiment of the present invention. In the diagram: (1), rotating frame (2), crane boom (2-1), main boom (2-2): telescopic boom (7): hydraulic motor (8); net lifting machine (9): outer pipe (11) = Telescopic tube

Claims (1)

[Claims] 1. A crane boom in which one or more telescoping booms are sequentially telescopically inserted into the outermost main boom, and a pair of independent outer pipes running along the longitudinal direction of the main boom are fixed to the outside of the main boom. One or more telescopic tubes are telescopically inserted into each of the outer tubes one after another, and the tip of the innermost telescopic tube is inserted into the innermost telescopic boom of the telescopic booms. 1. Piping for a fluid drive device of a telescopic crane distal end, characterized in that the piping is connected and fixed to the distal end and configured to conduct fluid between the proximal opening of the outer tube and the distal opening of the telescoping tube.