JP5202461B2 - Small ship ladder - Google Patents

Description

  The present invention relates to a small boat ladder that is used when a person falls from the small boat such as a leisure boat or a fishing boat into the sea or swims and returns to the ship from the sea surface.

  Conventionally, a ladder fixed to a ship is known as a ship ladder, but it is not used so much because it is bulky. However, many of the recent leisure boats and fishing boats have been increased in size, and if they fall into the water with only one boarding boat, they have to return to the boat by themselves, and even if they swim to the shore, If is weak, it cannot be easily returned to the ship. Without a ladder, it was not possible to go up from the sea surface to the ship, which could cause a life-threatening accident.

  Therefore, a ladder that can be expanded and contracted in the vertical direction and that can be folded so as not to be bulky when not in use has been proposed in Patent Document 1 below.

JP 2003-81178 A

  Conventional stretchable ship ladders are made to be applicable not only to small ships but also to medium-sized ships, so they are bulky and complicated in structure.

  Therefore, the present invention has been conceived to provide a ship ladder that is inexpensive and easy to handle and structure, mainly for application to small ships.

  In order to solve the above-mentioned problems, a ladder for a small ship according to the present invention includes an attachment member straddling the upper edge of the ship's shore, and an upper end rotatably supported by one end of the attachment member. A first strut member made of a square pipe having two elongated holes facing the both side surfaces in the longitudinal direction, and a square pipe having two elongated holes facing the both side surfaces of the upper part in the longitudinal direction; A second strut member inserted into one strut member, and two treads that are accommodated in the second strut member and can be opened and closed by a hinge, and can project from the two elongated holes when opened. And a wheel that is rotatably attached to the lower part of the second support member, and a means for restricting the lifting range of the second support member relative to the first support member.

  According to the ladder for small boats of the present invention, by installing it on the shore side of a small boat, even when only one person is on board, when falling down into the sea or swimming, You can easily return to the ship from the sea surface.

The front view which shows the non-use state which made the ship ladder of this invention hold sideways on the shore side of a ship, Longitudinal sectional view of the ship ladder when not in use, The front view which shows the state in the middle of hanging the ship ladder of this invention from the ship's side, A longitudinal sectional view in a state where the ship ladder is suspended from the shore side, The front view which shows the use condition which lowered | hung the ladder for ships of this invention from the ship's shore side, and was further pulled down, Longitudinal section in the state of use of the ship ladder, A longitudinal sectional view of a first support member and a second support member constituting the ladder; The longitudinal cross-sectional view which shows the detail of a 2nd support | pillar member, It is a side view which shows the use condition which suspended the ship ladder of this invention from the shore side of a ship, and was pulled down.

  As shown in the front view of FIG. 1, the ship ladder according to the present invention is stored sideways on the side 9 of the ship, and when used, when the oval wheel 5 is grasped by hand and pulled down, As shown in FIG. 3, when the ellipse wheel 5 is rotated vertically and pulled down, the two treads 41 and 42 protrude sideways to form a two-stage ladder as shown in FIG. It is configured.

  Thus, if there are two steps consisting of the wheel 5 and the treads 41, 42, it is easy to return from the sea surface to the ship of a small vessel.

  As shown in the side views of FIGS. 9 (a) and 9 (b), the ship ladder according to the present invention comprises two sandwiching members 31 and 32 having a U-shaped cross-section that is fixed with the ship's side 9 sandwiched therebetween. The mounting member 3 supports the two holding members 31 and 32 at both ends, and the ladder A whose upper end is rotatably supported by one of the holding members 31.

  The two holding members 31 and 32 of the mounting member 3 are laid across the upper edge of the ship's shore and have a U-shaped cross section. The inner side 312 and 322 sandwich the upper edge of the heel 9 A screw hole into which the butterfly screw 35 to be attached is screwed is formed.

  As shown in FIG. 9A, an inclined surface 311 is fixed to the outer surface side of one holding member 31, and a bolt 7 that rotatably supports the upper end of the ladder A is attached to the inclined surface 311. It is planted.

  As shown in FIG. 9 (b), on the outer surface side of the other holding member 32, a holding member 33 is fixed which is formed by bending an elastic plate into a U-shape for storing the ladder A laterally on the side of the ship. ing.

  As shown in FIGS. 7A and 7B, the ladder A is composed of two square pipes having different thicknesses, and one end portion (upper end portion) is an inclination of one holding member 31 of the mounting member 3. The first column member 1 is rotatably attached by a bolt 7 planted on the surface 311, and the second column member 2 is inserted into the first column member 1.

  As shown in FIG. 7 (a), the first strut member 1 has holes 12 through which bolts 7 provided in the holding member 31 are inserted in the upper portions of the front and back surfaces, and is opposed to both side surfaces of the lower portion. Two rectangular long holes 11 are formed in the longitudinal direction, and a hole 13 through which the rod-like stopper member 8 (see FIG. 6) is inserted is formed in the middle part between the front and back surfaces.

  As shown in FIG. 7 (b), the second support member 2 has two rectangular long holes 21 facing the both side surfaces of the upper portion in the longitudinal direction, and the first support member on the front and back surfaces. A slit 22 is formed that slides on the stopper member 8 fixed to 1 to limit the lifting range of the second column member 2.

  The shape of the elongated hole 11 of the first column member 1 and the elongated hole 21 of the second column member 2 are substantially the same, and the length thereof is set to be longer than the length of the treads 41 and 42.

  As shown in FIG. 8, two treads 41 and 42 each having a half 41a and 42a of a hinge 40 fixed to one end are prepared, and holes 23 are made in advance on the front and back surfaces of the second column member 2. . These two holes 23 are formed at a position higher by the thickness b of the treads 41 and 42 than the lowermost portion of the long hole 21 formed on both side surfaces of the second column member 2.

  Two treads 41 and 42 are inserted into the elongated holes 21 of the second column member 2 from both directions, and the half bodies 41a and 42a of the hinges 4 of the both step plates 41 and 42 are combined in the second column member 2 Then, the hinge 4 is formed by inserting the hinge shaft 43 through the holes 23 formed in the front and back surfaces of the second support column member 2 in the half bodies 41a and 42a.

  In this way, by forming the hinge 4 by combining the treads 41 and 42 in the second prop member 2, the two props 41 and 42 are folded as shown by the dotted lines in FIG. As shown in the solid line in FIG. 8, the two treads 41, 42 are expanded in a straight line so as to protrude from the long holes 11, 21 of the first column member 1 and the second column member 2. be able to.

  As shown in FIGS. 1-6, the elliptical ring | wheel 5 grasped by hand is attached to the lower end of the 2nd support | pillar member 2 so that rotation is possible. The wheel 5 is the first stage of the ladder A, and is not limited to an elliptical shape, but may be any shape that can be easily grasped by a hand such as a circle or a triangle and can be easily put on.

  When assembling this ladder A, as shown in FIG. 7B, the second column member 2 is inserted shallowly from the lower end of the first column member 1 with the treads 41 and 42 folded. And if the long hole 11 of the 1st support | pillar member 1 and the long hole 21 of the 2nd support | pillar member 2 are made to correspond, the treads 41 and 42 can be protruded from both the long holes 11 and 21. FIG.

  With the treads 41 and 42 projecting from the long holes 11 and 21, the rod-like stopper member 8 is inserted into the slit 22 of the second support member 2 through the hole 13 of the first support member 1. At this time, as shown in FIGS. 2, 4 and 6, a coil spring 6 is provided between the treads 41, 42 and the second support member 2 so that the treads 41, 42 are opened in the opening direction. Keep it.

  As described above, the stopper member 8 fixed to the first column member 1 is configured so that the slit 22 of the second column member 2 slides, whereby the second column member with respect to the first column member 1 is formed. 2 is limited in the lifting range.

  In a state where the second support member 2 is lowered most with respect to the first support member 1, as shown in FIG. 6, the long hole 11 of the first support member 1 and the long hole of the second support member 2. 21 coincides with each other, and the treads 42 and 44 protrude from the long holes 11 and 21. At this time, the lower surfaces of the treads 41 and 42 come into contact with both lower end surfaces of the long holes 11 and 21 and come to rest. The protruding treads 41 and 42 are the second stage of the ladder.

  When the second support member 2 is inserted into the first support member 1, the treads 41, 42 are folded against the elasticity of the coil spring 6 so that the second support member 2 is attached to the first support member 1. When inserted and pushed in, it can be pushed in until the lower end of the slit 22 of the second column member 2 hits the stopper member 8 fixed to the first column member 1.

  In this way, when the second support member 2 is pushed in, the elastic force of the coil spring 6 exerts a force that expands both the treads 41 and 42, so that both ends of the treads 41 and 42 are at the first support member 1. It is inserted while sliding on the inner surface.

  As shown in FIGS. 1 and 2, the ladder A assembled in this manner and supported at the upper end by the bolt 7 of the holding member 31 of the attachment member 3 so as to be freely rotatable is attached to the attachment member 3. In parallel (horizontal) with the lower end of the ladder being sandwiched and supported by a U-shaped holding member 33 having elasticity. At this time, the elliptical ring 5 rotatably supported at the lower end of the second support member 2 rotates and becomes parallel (horizontal) to the heel side.

  When the person is used to return from the sea surface to the ship, when the oval ring 5 is pulled down, as shown in FIGS. 3 and 4, the first support member 1 constituting the ladder A is attached to the mounting member 3. The ladder A is rotated and becomes vertical. When the elliptical ring 5 is further pulled down, the second support member 2 comes out of the support member 1 as shown in FIGS.

  When the upper end of the slit 22 of the second support member 2 is pulled down until it hits the stopper member 8 fixed to the first support member 1, the elongated hole 11 of the first support member 1 and the second support member 2 Since the long holes 21 coincide with each other, the folded treads 41 and 42 are expanded outward by the elasticity of the coil spring 6, so that the second step of the ladder is formed by projecting from the long holes 11 and 21 to both sides. To do.

  Thus, when the two-stage small marine ladder hanging on the ship's side is used, it is possible to easily return from the sea surface to the ship.

  Since the ladder A is supported obliquely downward by an inclined surface 311 formed on the outer surface side of the holding member 31, the lower end of the ladder A is separated from the ship's side of the ship, and even if the ship is shaken by waves, the ladder A The lower end of the can be easily grasped.

(Other embodiments)
In the embodiment described above, the ladder A is exposed when the ladder A is stored sideways on the side of the ship, but as shown by the dotted line in FIG. 9, the cross-sectional shape of the synthetic resin is L-shaped. It may be covered with a cover C. A horizontal side of the cover C is fixed to the upper surface of the mounting member 3, and the ladder A is covered with the other vertical side of the cover 8. A ship name or the like may be displayed on a vertical side of the cover C.

  In a state where the ladder A is stored sideways on the side of the ship, when the oval ring 5 is grasped by hand and pulled down, it may be difficult for the ship to shake and grasp the wheel 5 by hand. If the upper end of the tie is tied and the string is hung down, the ladder stored sideways can be easily put into use.

DESCRIPTION OF SYMBOLS 1 1st support | pillar member 2 2nd support | pillar member 3 Mounting member 4 Hinge 5 Elliptical ring 6 Coil spring 7 Bolt 8 Stopper 9 舷 side
11, 21 slotted hole
22 Slit
31, 32 Nipping member
33 Holding member
41, 42 tread
41a, 42a Hinge half
43 Hinge shaft

Claims (1)

A mounting member straddling the upper edge of the ship's side,
A first strut member made of a square pipe with an upper end rotatably supported at one end of the mounting member and two elongated holes facing the lower side surfaces in the longitudinal direction;
A second strut member made of a square pipe having two elongated holes facing the both side surfaces of the upper portion in the longitudinal direction, and inserted through the first strut member;
Two treads that are housed in the second strut member and can be opened and closed by a hinge, and can project from the two elongated holes when opened;
A ring that can be grabbed by a hand rotatably attached to a lower portion of the second support member;
Means for regulating a lifting range of the second column member with respect to the first column member;
A ladder for small boats characterized by comprising:

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