JP3013080U - Ladder - Google Patents

Abstract

(57) [Summary] [Purpose] A structure in which a triple ladder is upwardly extended or lowered by a single operation. [Structure] A drum is attached to the first ladder at the bottom, the first rope is connected via a roller between the drum and the second ladder incorporated in the first ladder, and the third ladder and the first ladder are connected to each other. It is connected with a second rope via the second ladder and moves up the third ladder in conjunction with the upward movement of the second ladder. By rotating the winding drum provided on the first ladder in the forward and reverse directions, A ladder body in which the third ladder is simultaneously moved up or down and the rollers and ropes are attached to the back surface of the ladder.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to the structure of a metal ladder used for disaster prevention activities, rescue evacuation, etc. in the event of a fire or other disaster.

[0002]

[Prior art]

 For double- and triple-type metal ladders used in fire and police disaster prevention and rescue activities, in the case of the triple-type configuration, the ladder was attached to the first ladder on the ground and floor contact surface. There is a two-stage operation structure in which the third ladder is extended by means of a rope and then the second ladder is extended. Also, attachments such as ropes and pulleys attached to the ladder body were also attached to the side rails of the ladder. It also hindered the freedom of the people and hindered the rescue operation. The applicant intends to solve this problem as a ladder manufacturer used in the event of a disaster in view of the above-mentioned difficulties.

[0003]

[Problems to be solved by the present invention]

 As a problem to be solved by the above, it is an object of the present invention to provide a rapid and effective structure in which the second ladder and the third ladder are simultaneously linked and extended or contracted by the same operation in the triple ladder body.

[0004]

[Means for Solving the Problems]

 As means for achieving the above-mentioned object, the first ladder and the second ladder are connected by a rope via rollers, and one end thereof is attached to the winding drum of the first ladder, and the third ladder and the first ladder are also provided. Is connected by a second rope via rollers, and the third ladder is moved upward in conjunction with the upward movement of the second ladder. The forward and reverse rotations of the winding drum provided on the first ladder cause the second and third windings to rotate. The ladder is designed to move up and down in conjunction with this. Also, it is essential that ropes, rollers, etc. are installed on the back side of the ladder so as not to interfere with the upward and downward movement of workers who use the ladder.

[0005]

[Action]

 A ladder body in which the second ladder and the third ladder are sequentially inserted and inserted in the first ladder can be rotated by rotating the handle of the winding drum attached to the first ladder to move the first rope wound around the winding drum to the first Since the lower part of the two ladders is connected via rollers, the second ladder is pulled up to the upper part of the first ladder. On the other hand, since the second ladder has the second rope fixed to the upper horizontal rod of the first ladder connected to the lower vertical support shaft of the third ladder via rollers, the third ladder of the winding drum is the same. The ladder moves upward in association with the upward movement of the second ladder, is pulled up to the upper part of the second ladder, and the ladder body is extended as three consecutive ladder bodies. The ladder descends when the hoisting drum is rotated in the reverse direction. After the ladder is extended, the connecting parts are fixed with latches, and if the latches are removed, the ladder returns to its original state. The rope and rollers attached to the ladder body are attached to the back side of the ladder body and do not interfere with the vertical movement of the worker who moves the ladder body up and down.

[0006]

【Example】

 Hereinafter, a suitable embodiment of the present invention will be described. FIG. 1 is a partially omitted side view of the ladder body of the present invention incorporated, FIG. 2 is a cross-sectional view showing the incorporation of the ladder body, and FIG. 3 is an overall front view of the extended ladder body. In the drawing, 10 is a ladder body, and 11 is a first ladder which is the lowermost part of the triple ladder body, and is formed of a corrosion-resistant metal material. Reference numeral 21 is a second ladder, and 31 is a third ladder, which are successively formed in a smaller size than the first ladder 11 as shown in FIG. 2. The second ladder 21 is assembled and inserted into the first ladder 11, and the third ladder 31 is inserted. Is incorporated in the second ladder 21. The first ladder is provided with supporting legs 13 for the ground contact surface and the floor contact surface 12, and the ladder body is assembled by a vertical support shaft 14 and a horizontal rod 15 and a connecting rod 16 of the vertical support shaft and the horizontal rod, and is supported by a reinforcing material as appropriate. Reference numeral 18 denotes a winding drum provided on the side surface of the first ladder at a height position where it can be easily operated from the ground contact surface or the like. 19 is a handle, and one end of the first rope R1 is connected to the winding drum on the drum 18, and the first rope R1 is extended and shortened by the forward and reverse rotation of the drum. The second ladder 21 is incorporated in the first ladder 11, and the hoisting drum 18 is attached at one end thereof. The first rope R1 is attached to the back side of the tip side rod 15 of the second ladder 21 as shown in FIGS. It is inverted through the roll 22 and is attached to the ring metal fitting 23 of the steel rod fixed to the lower horizontal rod 15 therebelow. 24 is a clip metal fitting. Reference numeral 25 denotes ring fittings fixed to both sides of the horizontal rod 15 above the first ladder. The second rope R2 is bound and the tip of the rope is connected to the third ladder via the roll 22 at the tip of the second ladder. It is attached to the mounting bracket 32 at the bottom of the vertical shaft. 33 is a clip. Therefore, the third ladder 31 is pulled out from the second ladder and extends in association with the upward movement of the second ladder 21. That is, since the second ladder 21 is moved upward by the rotation of the winding drum 18 of the first ladder 11, the third ladder 31 is also interlocked accordingly, and the second ladder and the third ladder are integrated with the first ladder. It moves or descends due to the reverse rotation of the winding drum. 34 is a spring-loaded frame-shaped latch that is attached to the vertical shaft of the ladder body, and is a frame-shaped latch that expands and contracts like a spring when the first and second ladders and the second and third ladders are extended and assembled and connected. When the ladder is moved up or down, it can be attached and removed freely.

[0007]

【effect】

 As described above, the present invention is a structure in which the triple ladder body fitted in the first ladder as a ladder body can be simultaneously extended or shortened by the winding drum when used in an emergency in a triple ladder body. A ladder body that adapts to urgency and speed as a ladder. Further, since the ropes, rolls, etc. are provided so as to be mounted on the back surface of the ladder body, there is an advantage that they do not hinder the lifting and lowering of the worker and other workability.

[Brief description of drawings]

FIG. 1 is a partially omitted side view showing a ladder body of the present invention incorporated therein.

FIG. 2 is a cross-sectional view showing the incorporation of the ladder body.

FIG. 3 is an overall front view in which a ladder body is extended.

FIG. 4 is a configuration diagram showing an outline of interlocking the first to third ladders.

FIG. 5 is a schematic view showing attachment of ropes of the first ladder and the second ladder.

[Explanation of symbols]

 10 Ladder body 11 First ladder 12 Ground contact surface 13 Support leg 14 Vertical support shaft 15 Horizontal rod 16 Connecting rod 18 Winding drum 19 Handle 21 Second ladder 22 Roll 23 Ring metal fitting 24 Clip 25 Ring metal fitting 31 Third ladder 32 Mounting metal fitting 33 clip R1 first rope R2 second rope 34 latch

Claims (1)

[Scope of utility model registration request] 1. A metal made expandable and contractable by sequentially inserting and inserting a second ladder of a smaller size and a third ladder into a first ladder consisting of a frame body having a rectangular cross section which stands on a grounding or floor contact surface. In the ladder body, the tip of the first rope pulled out from the winding drum attached to the first ladder is inverted through a roller attached to the tip of the first ladder, and the lower side of the second ladder incorporated in the first ladder is inverted. The second rope fixed to the rod and fixed to both sides of the lower longitudinal shaft of the third ladder separately from the first rope is attached to the tip of the second ladder via the roller attached to the tip of the second ladder. The second ladder and the third ladder, which are connected to the mounting brackets fixed to both sides of the lower horizontal rod and are fitted and inserted into the first ladder, are continuously connected simultaneously through the forward and reverse rotations of the winding drum of the first ladder. Provided so that it can be extended or built in and contracted, and the rope and roller A ladder body characterized by being attached and attached to the back surface of the ladder body.