JPH10287290A - Ladder in hold of cold storage cargo boat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save the labor for storage or laying of adders in a hold by supporting a second unit ladder to the tip of a support arm mounted on the inner wall of a hold in such a manner as to be rotatable so that the lower end of a first unit ladder and the upper end of the second unit ladder are pinned to both ends of a connecting member, respectively. SOLUTION: A connecting member 11 has a vertical elliptic hole 12, and a pin 10b is connected so as to be fitted to the elliptic hole. Namely, although the connecting member 11 is rotated around a pin 10a when a second unit ladder 6b is stored, the pin 10b situated in the lower part is moved along a virtual line (b) around a virtual point θ. Since the pin 10b is slid within the elliptic hole 12 at that time, the second unit ladder 6b can be smoothly stored. The elliptic hole 12 and the pin 10b may be formed on the upper end of the second unit ladder 6b and on the connecting member 11 side, as occasion demands, respectively. Further, the pin 10a for connecting the upper end of the connecting member 11 to the lower end of the first unit ladder 6a may be formed into the same structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ladder in a hold of a refrigerated cargo ship, and more particularly, to a ladder in a hold provided for a worker to enter and leave a hold of a ship for chilling and transporting fruits and the like. It is.

[0002]

2. Description of the Related Art Generally, a refrigerated cargo ship for chilling and transporting fruits and the like forms a large number of holds in which the hull is divided into a plurality of rows and stages, insulates the inner wall surface of each hold, and places heat insulating material in each hold. A ladder inside the hold is provided for workers to enter and leave. The ladder in the hold will be described more specifically. As shown in FIG. 8, a heat insulating material 3 is stretched on the inner wall surface of the hold 2 of the refrigerated cargo ship 1, and workers enter and exit from a hatch 5 provided on a deck 4. Ladder 6 is arranged vertically. The ladder 6 includes a first unit ladder 6a fixed in the hatch 5 by supporting members 7a and 7b, and a supporting member 7c fixed to the partition 9 by being connected to a lower portion of the first unit ladder 6a by a pin 8a. , 7d with a second unit ladder 6b attached by pins 8b, 8c. The second unit ladder 6b is detachable by pulling out the pins 8a, 8b, 8c. That is, the second unit ladder 6b is vertically inserted into the hold 2
The second unit ladder 6b becomes an obstacle when a cargo such as fruit is loaded because it is arranged so as to have an interval L from the surface of the unit. Therefore, when loading cargo in the hold 2, the second unit ladder 6b is detached and stored in a predetermined place outside the hold 2.

[0003]

However, in the conventional ladder in the hold of a refrigerated cargo ship as described above, the second unit ladder 6b disposed in the hold 2 is manually attached and detached, which requires a great deal of work. There are problems such as not only requiring time and labor but also securing a place to store the removed second unit ladder 6b.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and comprises a first unit ladder fixed in a lifting hatch and an inner wall of a hold. And a second unit ladder arranged along
The lower end of the first unit ladder and the upper end of the second unit ladder are pin-coupled to both ends of a connecting member, respectively, and the second unit ladder is rotatable up and down on the inner wall of the hold. It is an object of the present invention to provide a ladder in a hold of a refrigerated cargo ship which is configured to be pivotally supported at a tip of a mounted support arm. The second unit ladder, which is preferably disposed in the hold, has at least two support arms, each having a predetermined interval in the vertical direction on the inner wall of the hold and each of which is mounted to be rotatable in the vertical direction. It is supported by. The lower end of the first unit ladder and the upper end of the connecting member are connected by a first pin, the lower end of the connecting member and the upper end of the second unit ladder are connected by a second pin, and the first
A pin connection structure is adopted in which at least one of the first pin and the second pin is fitted into the elongated hole. Further, a vertical groove is formed in the heat insulating material stretched on the inner wall surface of the hold and the heat insulating material stretched on the support arm mounting portion, and the second unit ladder is rotated by rotating the support arm upward. Is stored inside the groove. According to the ladder inner ladder of the refrigerated cargo ship having such a configuration, the second unit ladder forming the inner hold ladder is pulled toward the inner wall side of the hold by rotating the support arm attached to the inner wall of the hold up and down. It can be stored or set for use, greatly reducing its working time and storage space.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a ladder in a hold of a refrigerated cargo ship according to the present invention will be described below with reference to FIGS. In these figures, the same symbols as those in FIG. 8 indicate the same names. FIG. 1 is a side view of a main part of the refrigerated cargo ship 1, FIG. 2 is a view along arrow AA in FIG. 1, and FIG. 3 is a view along arrow BB in FIG. 1 to 3, a pin 10 is attached to the lower end of the first unit ladder 6a fixed in the hatch 5 by support members 7a and 7b.
a, the upper end of the connecting member 11 is connected.
1 is rotatable in the direction of arrow a about the pin 10a. A pin 10 is provided at the lower end of the connecting member 11.
b connects the upper ends of the second unit ladders 6b.
Specifically, as shown in FIGS. 4 and 5, the connecting member 11 is provided with an elongated hole 12 in the vertical direction.
b are connected so as to fit each other. Coupling member 11 the length of the pin 10b is connected from the pin 10b member 11 is pivoted about a pin 10a located on the lower L ₁ when that is attempting to store this second unit ladder 6b as described below Move along a virtual line b centered on a virtual point θ separated by. At this time, since the pin 10b slides in the long hole 12, smooth storage is possible.
Of course, the long hole 12 may be formed at the upper end of the second unit ladder 6b as necessary and a pin 10b may be provided on the connecting member 11 side, or the upper end of the connecting member 11 and the lower end of the first unit ladder 6a may be connected. The connecting pin 10a may be configured as a similar mechanism. In this way, the second unit ladder 6b having the upper end pin-connected to the connecting member 11 is provided with support arms 13a, 1a and 1b which are rotatably mounted on the partition wall (inner wall) 9 of the hold 2 in the vertical direction.
3b. In detail, this support arm 1
3a and 13b are arranged at predetermined intervals in the vertical direction, are provided in grooves 14 formed in the vertical direction of the heat insulating material 3, and are mounted on the partition walls 9 as shown in FIGS. 6 and 7, respectively. The support members 7e and 7f are attached to the support members 7e and 7f so as to be rotatable in the vertical direction indicated by an arrow c by pins 10c and 10d. The second unit ladder 6b is attached to the distal ends of the support arms 13a and 13b by pins 10e and 10f so as to be pivotally supported. When the ladder in the hold of the refrigerated cargo ship having such a configuration is to be stored from the use state shown by the solid line in FIG. 1 now, the support arms 13a and 13b are rotated by human power or other means in the direction of the arrow c to indicate the dotted line. As shown, the second unit ladder 6b can be easily
4 can be stored. When the second unit ladder 6b is stored in the groove 14, a stopper mechanism (not shown) is actuated to hold the storage position. Of course, when the ladder 6 is to be used, the second unit ladder 6b is pulled out from the groove 14 and set by the reverse procedure. In FIGS. 1 and 2, reference numeral 15 denotes a lid of the hatch 5, and reference numeral 16 denotes a handle for guiding when an operator enters and exits.
It is configured to be able to be stored in.

[0006]

As is apparent from the above description, according to the ladder in the hold of a refrigerated cargo ship according to the present invention, the ladder in the hold can be stored or laid by a very simple operation of rotating the support arm. Significant work time can be shortened together with labor saving, so that cargo handling efficiency can be improved. In addition, there is no need to provide a special space for storing the ladder, and the effect is great.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a ladder in a hold of a refrigerated cargo ship according to the present invention.

FIG. 2 is a view as viewed in the direction of arrows AA in FIG. 1;

FIG. 3 is a view taken in the direction of arrows BB in FIG. 1;

FIG. 4 is an enlarged view of a portion C in FIG. 2;

FIG. 5 is a view as seen in the direction of the arrows D in FIG. 4;

FIG. 6 is an enlarged view of a portion E in FIG. 1;

FIG. 7 is a view taken along the line FF in FIG. 6;

FIG. 8 is a side view of a ladder in a hold of a conventional refrigerated cargo ship.

[Explanation of symbols]

1,10 Refrigerated cargo ship 2 Hold 3 Insulation material 4 Deck 5 Hatch 6 Ladder 6a First unit ladder 6b Second unit ladder 7a-7f Support material 8a-8d,
10a to 10f Pin 9 Partition wall 11 Connecting member 12 Slot 13a, 13
b Support arm 14 Groove 15 Lid 16 Handle

Claims (4)

[Claims] 1. A first unit ladder fixed in a lifting hatch and a second unit ladder arranged along an inner wall of a hold, and a lower end of the first unit ladder and the second unit. The upper end of the ladder is configured to be pin-connected to both ends of the connecting member, and the second unit ladder is pivotally supported on the tip of a support arm rotatably mounted on the inner wall of the hold in the vertical direction. Ladder in refrigerated cargo ship 2. The second unit ladder according to claim 1, wherein said second unit ladder is pivotally supported by tips of at least two support arms arranged at predetermined intervals in a vertical direction. 3. A lower end of the first unit ladder and an upper end of the connecting member are connected by a first pin, and a lower end of the connecting member and an upper end of the second unit ladder are connected by a second pin; 2. The pin connection according to claim 1, wherein at least one of the first pin and the second pin is configured to be fitted into an elongated hole. 4. A heat insulating material is stretched on the inner wall surface of the hold, and a vertical groove is formed in the heat insulating material and the heat insulating material stretched on the support arm mounting portion, and the support arm is turned upward. The ladder in the hold of a refrigerated cargo ship according to claim 1, wherein the second unit ladder is stored inside the groove by moving the ladder.