JPH0218392Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present application relates to a guide reel that supports the movement of a hose for suctioning dirt from a dredger, for example.

[Conventional technology]

The work of moving flexible hoses is often seen in the manufacturing industry or in daily life.

Fig. 3 shows an example of a dredger, which is a unique technology developed by the applicant, in which the suction side of pumps 8 built into the hull is connected to a flexible hose 2, and a movable hose carrier 9 is wound around the dredger. The attached suction head 10 is connected.

It is necessary to raise and lower the inlet to follow the changes in water depth at the dredging site, so the hose carrier rolls left and right on the rail (not shown) in the figure, and the flexible hose accordingly rolls left and right. Move on board. The hose itself is made to be sturdy enough to withstand the pump pressure, but when it is moved full of water-containing earth and sand, it becomes heavy, so a guide reel for the hose is installed on the ship in a fixed line. We strive to minimize the friction associated with moving large amounts of weight.

[Problem that the invention attempts to solve]

As shown in FIG. 2, the conventional guide reel 1a is mainly composed of an integrated drum-shaped roller 11 that receives a moving hose 2a, and the center of this roller is connected to a shaft 7.
a is supported by a bearing (not shown).

Therefore, when the hose mounted above moves,
This integral roller 11 rotates around the shaft, but since the outer tip A point of the reel and the center bottom point B have the same rotation speed, the distances from the shaft are different, so the circumferential speeds are different.

When the diameter of the roller is larger than the diameter of the hose, the difference in circumferential speed between points A and B is not a big problem, but in general, as shown in Figure 2, the minimum diameter that can support the hose is Since it is designed with , there is a relatively large difference in the circumferential speed at both points. Therefore, when the hose moves, the rolling of the roller near the outer surface where the peripheral speed is high is synchronized with the movement of the hose, while the hose slides while rubbing the roller surface near the central roller where the peripheral speed is low. It passes.

The movement of the hose is repeated many times depending on the type of work, and hoses such as dredges are usually heavy, large diameter, and long, so the hoses are subject to significant local wear due to friction.
In the end, there was a problem that the whole thing had to be replaced due to some wear and tear. In order to solve this problem, the applicant placed a plurality of guide reels at appropriate intervals from the bow to the stern of the dredger, as previously shown in Japanese Patent Application Laid-Open No. 61-21238.
The present invention discloses a means for suppressing friction caused by the movement of the hose by moving the guide reel on the ship when the supported hose moves. However, even with this means, it cannot be said that the movement of the heavy hose is necessarily satisfactory, and there has been a need for a means to solve the problem of local wear of the hose.

In order to solve the above-mentioned problems, the present invention aims to provide a new hose guide reel that significantly extends the service life of the hose without subjecting it to partial wear when the hose is moved.

[Means for solving problems]

The hose guide reel according to the present invention has a roller that receives a heavy hose divided into at least three parts, two outer parts and an inner part sandwiched between them, and the two outer rollers and the inner roller are rotated independently from each other. The above-mentioned problem was solved by the fact that the shaft itself, which supports all the rollers, is supported so that it can freely run on a fixed line extending from the bow to the stern on the dredger.

[Effect]

The operation of the hose guide reel 1 according to the present application will be explained based on FIG. 1 showing an embodiment. This figure is a front cross-sectional view, and the hose 2 is divided into at least three rollers 3 (outside), 4 (inside), 5 (outside). The number of inner rollers is not limited to one as shown in FIG. 1, but may be further divided into two or more.

When a force is applied to move the hose (in the front-rear direction of the drawing), a roller rotational force is applied on the tangent between the hose and the roller, causing each roller to rotate in synchronization with the passage of the hose.

At this time, the rollers are divided and the inner and outer parts rotate independently of each other, so depending on the difference in roller diameter, the outer rollers 3 and 5 rotate relatively slowly and the inner roller 4 rotates at a relatively high speed. There is an effect of trying to bring the circumferential speeds of the respective rollers in contact into approximately the same range. As a result, only slight rolling friction acts on the tangent between the hose and the roller, and sliding friction, which causes wear, almost no longer acts.

〔Example〕

FIG. 1 is a front sectional view of the embodiment of the present application.

The guide reel 1 has outer rollers 3 and 5 on both sides,
The hose 2 is received by three divided rollers including an inner roller 4 in the center. Outer rollers 3, 5
are connected by a boss 6 and configured to rotate together around a shaft 7. The inner roller 4 is
Separately from this, it is supported by the bosses 6 of both outer rollers and fitted so that it can rotate on the bosses 6 independently of the rotation of both outer rollers. As shown in Fig. 4, the shaft 7 is supported by a rotatable wheel 15 fitted into a rail 14 with a U-shaped cross section laid on the ship from the bow to the stern, so that the shaft moves on the ship while rotating. , exerts the effect of keeping the frictional resistance associated with the movement of the hose to a minimum level.

[Effect of idea]

Since the hose guide reel of the present invention produces the above-mentioned effects, when the hose moves on the reel, each of the reels rotates smoothly and independently, and there is no rubbing phenomenon, greatly extending the service life of the hose.

Conventionally, the guide reel itself was subjected to uneven rotational loads on various parts of the same shaft, which caused torsional stress to be constantly applied to the shaft, which could lead to fatigue of the material. It was reduced to

In addition, since the structure does not become too complicated or complicated, it also has the effect of allowing existing conventional products to be easily modified.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view showing an embodiment of the present invention;
FIG. 2 is a front sectional view showing the prior art, and FIG. 3 is a front sectional view showing how a hose guide reel is used.
FIG. 4 is a diagram explaining the action of the guide reel. 1... Guide reel, 2... Hose, 3, 5...
...outer roller, 4...inner roller.

Claims (1)

[Scope of utility model registration request] In a hose guide reel that supports the movement of a flexible hose, the roller that receives the heavy hose is divided into at least three parts, two outer parts and an inner part sandwiched between the two outer parts, and an inner part sandwiched between the two outer parts and the inner part. A hose guide reel that can rotate around axes independently of each other and is characterized in that the shaft itself that supports all the rollers is supported so that it can run freely on a fixed line extending from the bow to the stern on a dredging vessel. .