JP2006219097A - Hydraulic tool, and steering wheel fitting method using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hydraulic tool for a wide use in relation to a vessel, and to provide a steering wheel fitting method using the same. <P>SOLUTION: The hydraulic tool to be used when fitting a stock 4 for a steering wheel is provided with an annular ring 7, into which the stock 4 is to be inserted and which is formed with an oil pressure supplying path 13, and a ram part 12 provided in one end surface of the annular ring 2 and to be raised by the oil supplied from the oil pressure supplying path 13 to push the steering wheel 3. A clearance s is provided between the inside surface of the annular ring 7 and the outside surface 4a of the stock 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a hydraulic jig, and more particularly to a hydraulic jig used for installing a rudder.

  When a stock is press-fitted into a tapered side surface formed on a rudder in a ship, a hydraulic ring groove that is provided on the tapered side surface and expands the tapered side surface, and a hydraulic pressure that is screwed into the tip of the stock to pull the stock A rudder is installed using nuts. Since the screw portion at the tip of the stock is individually manufactured for each ship, a hydraulic nut that is screwed to the screw at the tip of the stock must be manufactured for each ship, which is expensive. As such a hydraulic nut, for example, the one shown in Patent Document 1 is known.

  Such a hydraulic nut is rarely used with hydraulic pressure applied after the rudder installation work is completed. Therefore, it is only necessary to have a function as a nut after the work is completed, and it is conceivable to replace the hydraulic nut with a normal nut.

Japanese Utility Model Publication No. 5-37466

  However, when the hydraulic nut is replaced with a normal nut after the installation of the rudder, the screw portion at the tip of the stock is different for each ship, so that there is a problem that the removed hydraulic nut cannot be used for other ships. Moreover, it is necessary to manufacture a special nut for each ship as an alternative to the hydraulic nut, which is troublesome twice.

  In view of such a problem, an object of the present invention is to provide a hydraulic jig that can be generally used for ships, and a method for attaching a rudder using the hydraulic jig.

  In order to solve the above-described problem, a hydraulic jig according to the present invention is a hydraulic jig used when a rudder stock is attached, and the stock is inserted and an annular ring in which a hydraulic supply path is formed; A ram portion that is provided on one end surface of the annular ring and rises by refueling from the hydraulic pressure supply passage to press the rudder, and a gap is provided between the inner surface of the annular ring and the outer surface of the stock Is provided.

  According to the present invention, by providing a gap between the inner side surface of the annular ring and the outer side surface of the stock, the size of the stock outer diameter can be allowed with a certain range, and the hydraulic jig can be widely used. . For this reason, it is not necessary to manufacture an expensive hydraulic nut for every ship, and since it can be set as the hydraulic jig which can be reused with respect to a ship, cost can be held down.

  In the hydraulic jig according to the present invention, the annular ring is formed by being divided into at least two or more.

  According to the present invention, the removal work of the hydraulic jig can be facilitated by forming the annular ring into at least two parts. Thereby, the work in a high place can be performed safely and work efficiency can be improved.

  In the hydraulic jig according to the present invention, a plurality of the ram portions are formed.

  According to the present invention, by providing a plurality of ram portions and forming the ram portion on one end face of the annular ring, the structure and the sealing performance can be simplified and can be manufactured at low cost.

  Further, in the rudder mounting method according to the present invention, in the rudder mounting method in which stock is press-fitted into the rudder via the rudder horn and the rudder is attached to the hull, the taper side surface formed on the rudder via the rudder horn. An insertion step of inserting the taper portion of the stock, an attachment step of attaching a nut to a screw portion formed at the tip portion of the stock via a hydraulic jig, and oil supply to a ram portion formed on one end surface of the hydraulic jig Then, the ascending step of raising the ram portion to press the rudder, the diameter increasing step of expanding the tapered side surface by applying hydraulic pressure to the tapered portion of the rudder, and after the stock is inserted into the rudder, A tightening step of removing the hydraulic jig and tightening the nut to the tip of the stock.

  According to the present invention, after press-fitting the stock tip into the tapered side surface of the rudder in the ascending step of raising the ram and pressing the rudder and the diameter expanding step of expanding the tapered side surface, by removing the hydraulic jig, The hydraulic jig can be a reusable hydraulic jig for the ship. Thereby, it is not necessary to manufacture an expensive hydraulic nut for every ship, and the rudder can be attached at low cost.

  According to the hydraulic jig of the present invention and the method of attaching a rudder using the hydraulic jig, the cost can be reduced by using a general-purpose hydraulic jig instead of an expensive hydraulic nut. Moreover, the installation work of a rudder can be performed easily and work efficiency can be improved.

[First Embodiment]
Below, the structure of the hydraulic jig concerning 1st Embodiment of this invention is demonstrated with reference to FIGS. 1-4. FIG. 1 shows a side view in which a rudder is attached to the stern, and FIG. 2 shows a cross-sectional view in the X view of FIG. FIG. 3 is a side view for explaining a method of attaching a rudder stock using the hydraulic jig in the present embodiment, and FIG. 4 is a perspective view showing a relationship between the rudder stock and the hydraulic jig.

In FIG. 1, a rudder 3 is attached to a rudder horn 2 formed on the bottom surface of the stern 1 with a rudder stock 4 and a pintle 5.
The stock 4 is attached to the upper part of the ladder horn 2, and the pintle 5 is attached to the lower part of the ladder horn 2, and each is press-fitted into the rudder 3 and fixed. Tapers 4a and 5a are formed on the outer surfaces of the tips of the stock 4 and the pintle 5, respectively, and screw portions 4b and 5b are formed on the most distal end. A nut 6 is screwed to the tip of the stock 4 and the pintle 5, and a female screw portion is formed on the inner surface of the nut 6 so as to be screwed to the screw portions 4b and 5b of the stock 4 and the pintle 5. Yes.
Note that a hydraulic jig (annular ring 7) for press-fitting the stock 4 is inserted between the tip of the stock 4 and the nut 6 during the rudder mounting operation.

  An opening 8 is formed on one side surface of the rudder plate 3b near the nut 6, and a nut and a hydraulic jig (to be described later) are carried in and out from the opening 8. The opening 8 is closed with a steel plate or the like after the rudder 3 is attached.

  As shown in FIG. 2, the portion into which the stock 4 and the pintle 5 of the rudder 3 are press-fitted is formed of a casting 3a. The other part of the rudder 3 has a structure in which the outer periphery of a skeleton 9 called a rudder plate 3b is pasted by a steel plate 10, and the rudder plate 3b is hollow. A hole 11 for press-fitting stock is formed in the center of the casting 3a, and a taper surface is formed on the inner periphery forming the hole 11 so as to taper downward in the vertical direction. .

Next, an apparatus configuration for press-fitting the stock 4 during the rudder installation work will be described in detail with reference to FIG.
In FIG. 3, a plurality of ring-shaped hydraulic ring grooves 20 are formed on the tapered surface 11 a of the rudder 3 engaged with the tapered portion 4 a of the stock 4 in order to apply hydraulic pressure to the tapered portion 4 a of the stock 4. ing. The plurality of hydraulic ring grooves 20 are connected by a connecting path 21. A supply port 22 for supplying a pressure medium (for example, oil) is connected to one or several places of the hydraulic ring groove 20. Oil (pressure medium) is supplied to the hydraulic ring groove 20 from the hydraulic tank 16 via the hose 15. A hydraulic gauge 17 is connected to the hose 15 near the hydraulic tank 16.

A nut 6 is temporarily fixed to the tip 4b of the stock 4 with an annular ring 7 interposed therebetween. The annular ring 7 is formed with a ram portion 12 that rises by hydraulic pressure at one end surface thereof, and a supply path 13 for supplying oil to the ram portion 12. Oil supply to the supply path 13 is supplied from a supply port 14 via a hose 15 from a hydraulic tank 16 installed on the ground. The supply port 14 and the supply path 13 are connected on the outer peripheral surface of the annular ring 7.
The hydraulic tank 16 and the hydraulic gauge 17 are provided for the hydraulic ring groove 20 and the hydraulic jig, respectively.

  The inner diameter dimension of the annular ring 7 is set so that a gap s is formed between the inner diameter surface 7a (see FIG. 4) of the annular ring 7 and the outer surface of the tip end portion of the stock 4. Due to the gap s, the size of the tip portion of the stock 4 that is different for each ship can be allowed to some extent. For this reason, no thread is formed on the inner diameter surface 7a of the annular ring 7 (see FIG. 4).

  In FIG. 4, a threaded portion 4 b is formed at the tip of the stock 4, and a thread is formed on the inner diameter surface of the nut 6 so as to be screwed with the threaded portion 4 b. This thread is produced exclusively for screwing with the threaded portion 4b of the stock 4 that is different for each ship. A washer 19 and a hydraulic jig (annular ring 7) are interposed between the tip of the stock 4 and the nut 6. The upper end surface of the washer 19 is in contact with the casting 3 a (see FIG. 3) of the rudder 3, and the lower end surface is in contact with the ram portion 12 of the annular ring 7. Supply holes 13a are formed in one or several places on the outer peripheral surface of the annular ring 7, and the supply holes 13a and the supply ports 14 of the hose 15 are connected to supply oil.

Next, a method for attaching a rudder using the hydraulic jig according to the present invention will be described with reference to FIG.
First, in the insertion step, the L-shaped protrusion when the rudder horn 2 is viewed from the side and the rectangular notch of the rudder 3 are engaged, and the stock 4 is inserted into the casting 3 a of the rudder 3. In this manner, the tapered portion 4a of the stock 4 is inserted by its own weight into the tapered side surface 9a formed on the rudder 3 via the ladder horn 2.

  Next, in the attaching process, the nut 6 is attached to the screw portion 4b formed at the tip end portion of the stock 4 through the hydraulic jig (annular ring 7) from the opening portion 8 formed in the rudder 3. At this time, the casting 3a and the hydraulic jig are attached via a washer 19 (see FIG. 4).

  Next, in the ascending step, the ram portion 12 provided on the upper end surface of the annular ring 7 is supplied with oil through a hose 15 by a hydraulic tank 16 installed on the ground. By supplying oil from the supply port 14 of the hose 15 to the supply hole 13a (see FIG. 4) via the supply path 13, the ram portion 12 rises. The ram portion 12 tries to push up the casting 3a through the washer 19, while receiving a reaction force with the nut, a force acts to pull the stock 4 downward.

Furthermore, in the diameter expansion step, the tapered surface 11a is expanded in diameter by applying hydraulic pressure to the tapered surface 11a of the rudder 3. As a result, a slight gap is formed between the stock 4 and the tapered portion 4a, and the stock 4 descends downward due to the pulling force generated by the ascending process. The stock 4 is press-fitted by gradually increasing the hydraulic pressure in the ascending process and the diameter expanding process and repeatedly performing the process several times. After confirming that the front end portion of the stock 4 protrudes by a predetermined amount with respect to the lower end surface of the casting 3a, the oil supply to the hydraulic ring groove 20 and the annular ring 7 is stopped.
At this time, since the taper portion 4a of the stock 4 is pressure-fitted by the taper surface 11a of the casting 3a, it is securely fixed.

  Finally, in the tightening process, after the stock 4 tip is press-fitted by a specified amount, the nut 6 is once removed, and the hydraulic jig (annular ring 7) is removed from the stock 4 tip. Thereafter, the nut 6 is screwed into the screw portion 4b at the tip of the stock 4 and securely tightened, whereby the press-fitting operation of the stock is completed.

  After the press-fitting work of the stock 4 is completed, the tapered surface 5a of the pintle 5 is pushed into the rudder 3 as shown in FIG. Unlike the case of the stock 4, the pintle 5 simply engages the pintle 5, and the tapered surface 5 a is engaged with the tapered portion of the rudder 3 by its own weight. For this reason, a hydraulic jig is not necessary.

  By attaching the rudder 3 to the ladder horn 2 as described above, the installation work of the rudder 3 is completed. After the installation work of the rudder 3 is completed, the work opening 8 opened on the side surface of the rudder 3 is closed with a steel plate or the like. In addition, the steel plate that closes the opening 8 is provided with a viewing window, and this viewing window is, for example, whether the marks attached to the nut 6 and the stock 4 are not shifted during periodic inspection, for example, This is for confirming whether the nut 6 is loose.

  According to such a hydraulic jig, the threaded portion 4b can be allowed within a certain range with respect to the stock 4 having different dimensions and thread shapes for each ship, and can be used for general purposes. Here, within a certain range, since the outer diameter of the screw portion 4b of the stock 4 is roughly divided into a large ship and a medium-sized ship, the maximum dimension of the outer diameter of the screw portion 4b in each of the large ship and the medium-sized ship. And the range that allows the minimum dimensions. Accordingly, the inner diameter of the hydraulic jig (annular ring 7) is determined by the outer diameter of the largest screw portion 4b of the large ship and the medium ship, and the gap s (see FIG. 3) at this time is minimized.

  If two types of hydraulic jigs are prepared for large ships (eg, LNG ships and VLCC ships) and medium-sized ships (eg, LPG ships, PCC ships, etc.), most of the stocks can be handled. It becomes.

Next, each embodiment of the hydraulic jig of the present invention will be described with reference to FIGS. 5 (a) to 7 (b). The first embodiment is different from the first embodiment in that the hydraulic jig can be divided.
[Second Embodiment]

Fig.5 (a) shows the top view of the hydraulic jig in this embodiment, FIG.5 (b) has shown sectional drawing of Fig.5 (a).
In FIG. 5A, the annular ring 7 is divided into two parts, and can be connected and separated by the connecting means 25. A plurality of cylindrical ram portions 24 having a central axis in the same direction as the central axis of the annular ring 7 are arranged in the annular ring 7. In the present embodiment, four ram portions 24 are arranged with respect to the annular ring 7 on one side. Further, a supply path 13 that connects the ram portions 24 is formed. A part of the supply path 13 is opened in the outer peripheral surface of the annular ring 7, and a supply hole 13a is formed here.

  As shown in FIG. 5B, a sealing means 23 such as an O-ring is provided on the outer periphery of the ram portion 24, and pressure is supplied from a gap between the ram portion 24 and the supply path 13 by supplying a pressure medium. Sealed to prevent media leakage.

For example, the connecting means 25 shown in FIG. 8 is applied. FIG. 8 is a perspective view showing a connecting portion of the annular ring 7.
The connecting means 25 is composed of a projection 30 formed on the annular ring 7 and a coupling jig 31 that fits and fastens the projection. As for the projection part 30 formed in the annular ring 7, one projection part 30a is formed in a prismatic shape, and the other projection part 30b is formed in a semi-cylindrical shape. The coupling jig 31 includes a block body 32 in which a recess having a shape corresponding to the protrusion 30 is formed, and a presser shaft body 33 that is screwed into a side surface of the block body 32 and has a female screw portion formed at the tip. I have. A disc-shaped presser member 34 is attached to the tip of the presser shaft 33.
When connecting the annular ring 7, the block body 32 is fitted so that the protrusion 30 is received in the recess of the block body 32, and the presser shaft body 33 is rotated to advance toward the protrusion 30, thereby holding the pressing member 34. Is pressed against the side surface of the protrusion 30a. Instead of the screw-in type presser shaft body 33, a shaft body including the presser member 34 may be advanced to the protruding portion 30 side by a hydraulic cylinder. That is, what is necessary is just to fix the projection part 30 via the pressing member 34.

As described above, by using the hydraulic jig 7 having the two-divided configuration, it is not necessary to remove the nut once and remove the hydraulic jig in the tightening process of the rudder mounting operation described in the first embodiment. Therefore, the annular ring 7 of the hydraulic jig can be separated and removed while the nut is attached, and the nut can be tightened, and workability can be improved.
In addition, since the ram portion 24 has a cylindrical shape and is arranged in a plurality, the structure is simplified, and the sealing performance of the ram portion 24 can be easily maintained even when the annular ring 7 is divided.

[Third Embodiment]
Next, the configuration of the hydraulic jig according to the third embodiment will be described with reference to FIGS. Here, Fig.6 (a) shows the top view of the hydraulic jig in this embodiment, FIG.6 (b) has shown sectional drawing of Fig.6 (a). This is different from the second embodiment in the arrangement of the hydraulic pressure supply path.
In FIG. 6A, the annular ring 7 is divided into two parts in the radial direction, and can be connected and separated by the connecting means 25. A plurality of cylindrical ram portions 24 having a central axis in the same direction as the central axis of the annular ring 7 are arranged in the annular ring 7. In the present embodiment, four ram portions 24 are arranged with respect to the annular ring 7 on one side.

  Further, as shown in FIG. 6B, a supply path 26 that connects between the ram portion 24 and the ram portion 24 is formed along the outer peripheral surface of the annular ring 7. A groove is formed in the outer peripheral surface of the annular ring 7 so that substantially half of the supply path 26 is embedded when viewed in plan as shown in FIG. 6A, and the supply path 26 is provided in this groove. An inner side surface of the supply path 26 communicates with the vicinity of the center of the lower end of the ram portion 24, and a supply hole that is partially open and connected to a hose (see FIG. 3) on the outer side surface of the supply path 26. 26a is formed. A hose is connected to the supply hole 26a, and a pressure medium such as oil is supplied to the supply path 26 from the hydraulic tank. Further, a sealing means 23 such as an O-ring is provided on the outer periphery of the ram portion 24 and is sealed so that oil does not leak from the gap between the ram portion 24 and the supply path 26 by supplying oil.

  As described above, since the annular ring 7 is divided into two parts, in the tightening process of the rudder mounting operation described in the first embodiment, it is not necessary to remove the nut once to remove the hydraulic jig and attach the nut. The annular ring 7 can be separated and removed, and the nut can be tightened, so that the workability can be improved.

  In addition, since the ram portion 24 has a cylindrical shape and a plurality of ram portions 24 are arranged, the structure is simplified, and the sealing performance can be easily maintained even as a divided structure. Further, by forming a groove on the outer peripheral surface of the annular ring 7 and providing the supply path 26 along the groove, the processing of the supply path 26 is facilitated and the production work is efficient.

[Fourth Embodiment]
Next, the configuration of the hydraulic jig according to the fourth embodiment will be described with reference to FIGS. Here, Fig.7 (a) shows the top view of the hydraulic jig in this embodiment, FIG.7 (b) has shown sectional drawing of Fig.7 (a). This is different from the second embodiment in the arrangement of the hydraulic pressure supply path.
In FIG. 7A, the annular ring 7 is divided into two in the radial direction, and can be connected and separated by the connecting means 25. The annular ring 7 is provided with a halved ring-shaped ram portion 27. In the present embodiment, the ram portions 27 are respectively arranged with respect to the annular ring 7 on one side. However, the ram portions 27 may be divided into a plurality of parts.

  Further, as shown in FIG. 7B, a supply path 28 is formed along the ram portion 27 at the lower end portion of the ram portion 27. A supply hole 28 a for connection to the supply path 28 is formed at one or a plurality of locations on the outer peripheral surface of the annular ring 7. Further, a sealing means 23 such as an O-ring is provided on the outer periphery of the ram portion 27 and is sealed so that oil does not leak from a gap between the ram portion 27 and the supply path 28 by supplying oil. A hose is connected to the supply hole 28a, and oil is supplied from the hydraulic tank. The supply hole 28a may be directly connected to the ram portion 27 so as to be supplied with oil.

As described above, the annular ring 7 is divided into two parts, so that it is not necessary to remove the nut once to remove the hydraulic jig in the tightening process of the rudder mounting operation described above. The ring 7 can be separated and removed, and the nut can be tightened, so that workability can be improved.
Further, by adopting a configuration in which the ram portion 27 is disposed over the entire upper end surface of the annular ring 7, a force for pulling the stock downward can be applied uniformly over the outer peripheral portion of the stock.

It is a side view which shows the state in which the rudder was attached to the stern concerning 1st Embodiment of this invention. It is the cross-sectional view which looked at FIG. 1 concerning 1st Embodiment of this invention in the cross section in X. FIG. 3 is a side view showing a method for attaching a rudder stock using the hydraulic jig according to the first embodiment of the present invention. It is a perspective view showing the relation between the rudder stock and the hydraulic jig according to the first embodiment of the present invention. It is a figure which shows the structure of the hydraulic jig concerning 2nd Embodiment of this invention, Fig.5 (a) shows a top view, FIG.5 (b) shows sectional drawing. It is a figure which shows the structure of the hydraulic jig concerning 3rd Embodiment of this invention, Fig.6 (a) shows a top view, FIG.6 (b) shows sectional drawing. It is a figure which shows the structure of the hydraulic jig concerning 4th Embodiment of this invention, Fig.7 (a) shows a top view, FIG.7 (b) shows sectional drawing. It is a perspective view which shows the connection means of the hydraulic jig concerning 2nd thru | or 4th embodiment of this invention.

Explanation of symbols

2 Ladder horn 3 Rudder 4 Stock 5 Pintle 6 Nut 7 Annular ring 12 Ram part 13 Supply path 14 Supply port 15 Hose 16 Hydraulic tank 25 Connecting means

Claims (4)

In the hydraulic jig used when installing the rudder stock,
An annular ring in which the stock is inserted and a hydraulic supply path is formed;
A ram portion that is provided on one end surface of the annular ring and rises by refueling from the hydraulic pressure supply path to press the rudder,
A hydraulic jig, wherein a gap is provided between an inner surface of the annular ring and an outer surface of the stock. The hydraulic jig according to claim 1, wherein the annular ring is divided into at least two parts. The hydraulic jig according to claim 1 or 2, wherein a plurality of the ram portions are formed. In the rudder mounting method, the stock is pressed into the rudder via the ladder horn and the rudder is attached to the hull.
An insertion step of inserting a taper portion of the stock into a tapered side surface formed on the rudder via the ladder horn;
An attaching step of attaching a nut to a screw portion formed at a tip portion of the stock via a hydraulic jig;
An ascending step of refueling a ram part formed on one end surface of the hydraulic jig and raising the ram part to press the rudder,
A diameter expansion step of expanding the tapered side surface by applying hydraulic pressure to the tapered portion of the rudder;
And a tightening step of removing the hydraulic jig and tightening the nut to the tip of the stock after the stock is inserted into the rudder.

Images