WO2006090770A1

WO2006090770A1 - Ladder

Info

Publication number: WO2006090770A1
Application number: PCT/JP2006/303251
Authority: WO
Inventors: Keisuke Matsumoto; Teruji Kanemitsu; Yasumitsu Tsutsumi
Original assignee: Sanoyas Hishino Meisho Corporation; Seamate Inc.
Priority date: 2005-02-24
Filing date: 2006-02-23
Publication date: 2006-08-31
Also published as: KR101254829B1; CN101128642B; JP2006264668A; KR20070110380A; JP5351372B2; CN101128642A

Abstract

A simple ladder substitutable by a traffic facility for inspection such as a scaffold required in the holds of an oil tanker and a bulk carrier. The ladder is characterized in that a plurality of ladder units having at least a pair of columns and at least one step installed between these columns are connected to each other to form it in an articulated shape so as to be bent at connected portions and at least one roller leg is installed on the lower surface side of the unit ladder. In the inspection operation, a rope is also hooked to a hopper top part round bar with a rod as well as to an upper part round bar, the end of the rope is tied to the step of the ladder unit nearest the round bar hooked to a knuckle part, and the ladder is pulled up. Then, a pull rope is pulled to pull the ladder toward the knuckle part. After the ladder is pulled to the knuckle part, the rope is tied to the step of the ladder unit manually accessible from the upper side of a tank top, and when the ladder is lowered, the pull rope is released beforehand.

Description

Specification

Ladder

Technical field

[0001] The present invention relates to a ladder, and more particularly to a ladder suitable for use in a wall inspection of a ship's hold.

Background art

[0002] Under the Marine Life Safety Convention (SOLAS), the hold (the hold), which is the cargo area for oil tankers and Balta carriers, is used for monitoring and early detection of cracks and corrosion damage occurring in the structure of the hull. ) Etc. are newly provided with transportation facilities for inspection such as scaffolding, or depending on the specific place, equipped with portable equipment on board for inspection.

[0003] However, it is also a problem in that it is difficult to provide a fixed scaffold or the like in terms of structure, and the cost of equipment increases. Among them, the use of fixed or portable equipment is obligatory for the inspection requirements for structural members in the cargo hold, such as ribs, but the installation of such fixed equipment is an obstacle to normal ship operation, so it is portable. The use of facilities is expected.

Disclosure of the invention

Problems to be solved by the invention

[0004] Therefore, the present invention is intended to solve the above-mentioned problems using a commercially available ladder.

Means for solving the problem

[0005] The ladder of the present invention according to claim 1 is configured such that a plurality of unit ladders each including at least a pair of struts and at least one step between the struts are connected and bent at the connecting portion. It is characterized by being articulated.

[0006] The invention according to claim 2 is characterized in that the ladder of claim 1 is provided with at least one flat leg on the lower surface side of the unit ladder.

[0007] According to claim 3 of the present invention, the ladder of claim 1 or 2 is connected to the leading unit. The ladder includes a hook.

[0008] According to claim 4, in the ladder according to any one of claims 1 to 3, the connection between the unit ladders is such that a connection column is fixed to the outside of each of the pair of columns, and the connection support. The pillar is provided with a pair of through holes, and a fixing member such as a bolt is passed through at least one of the through holes.

The invention's effect

[0009] The ladder of the present invention can be configured at low cost, and has an advantage that if it is used for ship inspection, it is possible to avoid the necessity of providing a fixed scaffold or the like.

Brief Description of Drawings

FIG. 1 is a plan view (A) and a side view (B) showing an embodiment of a ladder according to the present invention.

[FIG. 2] A plan view (A) and a side view (B) showing a unit ladder other than the end unit ladder.

[FIG. 3] A plan view (A) and a side view (B) showing the end unit ladder.

FIG. 4 is a cross-sectional view showing an example in which a frame is inspected using a ladder according to an embodiment of the present invention within the hold of an oil tanker or a Balta carrier.

FIG. 5 is a diagram showing the movement of the hook during use.

FIG. 6 is a cross-sectional view showing an example in which a frame is inspected using a ladder according to an embodiment of the present invention in the hold on the stern side of an oil tanker or Balta carrier.

Explanation of symbols

[0011] 1-17 units ladder

20 hook

21 Leg with roller

31 Prop

32 stepping on

33 Connecting strut

34 Reinforcement plate

35 wheel unit

36 Connecting plate 39, 40 Through hole

41 Bonoreto

42 Ring for fixing rope

42, 43 round bars

44 rope

45 frames

46 Tank top

50 workers

BEST MODE FOR CARRYING OUT THE INVENTION

[0012] An embodiment of a ladder according to the present invention will be described with reference to the drawings.

Example 1

FIG. 1 is a plan view (A) and a side view (B) showing an embodiment of a ladder according to the present invention. Reference numerals 1 to 17 in the figure are unit ladders. For example, most of the members are made of an aluminum mold or the like. The unit ladder 1 on one end side is provided with a hook 20. Each of the unit ladders 1 to 17 is provided with at least a pair of legs 21 with rollers on the lower surface side.

FIG. 2 is a plan view (A) and a side view (B) showing the unit ladders 2 to 17 other than the unit ladder 1. In the figure, 31 is a support, 32 is a step, 33 is a connection support, 34 is a reinforcing plate, 35 is a wheel unit, 36 is a connection plate, 37 is an end plate, and 38 is a lid.

[0015] The connecting strut 33 is provided with a pair of through-holes 39 and 40, and each can be fastened with a nut through a bolt 41. That is, if the nut 41 is screwed to only one through hole 40 (for each of the pair of struts 31) through the bolt 41, the unit ladders 2 to 17 and the other unit ladders 2 to 17 (unit ladder 1 as described later) Excluding) means that the bolt 41 passing through the through hole 40 can be turned and bent around the axis. Further, if the nuts are fastened with bolts 41 to the two through holes 39 and 40, respectively, the unit ladders 2 to 17 and the other unit ladders 2 to 17 can be fixed, and the turning bending can be prevented.

FIG. 3 is a plan view (A) and a side view (B) showing the unit ladder 1. The main structure is the same as the other unit ladders 2-17. Na The unit ladder 1 can be bent with respect to the other unit ladder 2 so that it is difficult to use. Therefore, the adjacent unit ladder 2 should be fixed. In the figure, 42 is a ring for fixing the rope, and is provided on one of the steps 32.

[0017] With reference to FIG. 4 and FIG. 5, the usage pattern of the ladder of this embodiment will be described. FIG. 4 is a cross-sectional view showing an example in which a frame is inspected using a ladder according to an embodiment of the present invention in the hold of an oil tanker or a Balta carrier. The unit ladder is 15 pieces. Fig. 5 shows the movement of the hook during use. In addition, round bars 42 and 43 are provided on the wall surface in the hold of the Balta carrier at the upper part and in the vicinity of the hopper top's knuckle part, respectively, so that the rope 44 can support the ladder. In the figure, 45 indicates a frame protruding within the hold of the Balta carrier, and 46 indicates a tank top.

[0018] In this embodiment, the unit ladders 1 to 7 are fixed between two bolts 41 so that they cannot be bent. This is to ensure that the ladder bends over the hopper top's knuckle.

[0019] And

(1) Hang the rope 44 on the upper round bar 42 and the knuckle round bar 43 with scissors (see Fig. 5 (A))

(2) Connect the end of the rope 44 to the step 2 that is closest to the round bar of the ladder (the seventh ladder 7 from the top in the figure) that hooks the end of the rope 44 on the knuckle.

(3) Pull the rope 44, pull the ladder up with the unit ladder 1 side first, and use the fact that the rope 44 is hung on the round bar 43 of the knuckle part, pull the ladder to the knuckle part,

(4) After pulling, tie the rope 44 to the lowest step 2 of the ladder where the upper force of the tank top is within reach (in the example shown, the lower force is also the second unit ladder 14).

(5) The first unit ladder 1 side rises along the inner wall surface of the hold, and the hook 20 warps along the round bar 42 (see Fig. 5 (B)).

(6) When it rises further along the inner wall surface of the hold, the hook 20 grasps the round bar 42 (see Fig. 5 (C)).

The operator 50 should be able to perform inspection work by the following procedure. In addition, low for drawing Care must be taken to tie the top of the rope 44 so that the cable 44 is located at the center of the ladder.

[0020] When lowering the ladder of this embodiment,

(1) First release the rope 44,

(2) Push the V, tang unit ladder 1 side up and remove the hook 20 from the round bar 42.

(3) Then slowly lower the entire ladder onto the tank top 46

Take the steps.

FIG. 6 is a cross-sectional view showing an example in which a frame is inspected using a ladder according to an embodiment of the present invention in a hold on the stern side of an oil tanker or a Balta carrier, for example. The unit ladder is 17 pieces.

Industrial applicability

[0022] By changing the number of the ladders used in various ways, it can be used more easily, and it is convenient for uses other than inspection of ships and the like.

Claims

The scope of the claims

[1] A unit comprising a plurality of ladders including at least a pair of support columns and at least one step between the support columns, and having a multi-joint shape that can be bent at the connection site. Ladder.

[2] The ladder according to claim 1, wherein at least one roller leg is provided on a lower surface side of the unit ladder.

[3] The ladder according to claim 1 or 2, wherein the unit ladder on the front side includes a hook.

[4] The ladder according to any one of claims 1 to 3, wherein the connection between the unit ladders includes a connection strut fixed to each outside of the pair of struts, and a pair of through holes provided in the connection strut. A ladder characterized in that it is carried out through a fixing member such as a bolt through at least one of the above.