JP3024686U - Mechanism to prevent biting of the holding metal fitting piece in the hanging metal fitting attached to the third ladder of the triple ladder - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] A holding metal piece provided for a hooking metal to be mounted on a third ladder of a triple ladder is bitten between the second ladder support rod and the first ladder support rod and the upper and lower portions of the ladder body. Prevent obstacles that lock the moveable. SOLUTION: An elastic stopper metal fitting is detachably screwed and fixed in the metal fitting near the upper portion of the metal fitting provided on the metal fitting main body, and the upright standing of the metal fitting is suppressed and adjusted.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention mainly relates to a mechanism of a hook fitting which is attached to a triple ladder used as an emergency ladder for fire fighting, police, etc., and which is used as an emergency ladder to smoothly adjust the vertical movement of a vertically extending ladder.

[0002]

[Prior art]

 The applicant has applied for various ladder mechanisms as a ladder maker, but previously filed an application for hanging metal fittings for an expansion and contraction independent ladder, which has been filed as a public application (Jitsuhei 7-8799). Conventionally, three consecutive ladders are connected to the first and third ladders on the left and right sides of the supporting rods. The hooks are the first and second ladders, and the third and third ladders by means of pulleys and ropes. The ladder body extending in the direction is fixedly connected by the upper and lower hooks. As shown in FIG. 11, the latching tool body is a rectangular metal fitting which is attached to a supporting rod 29 which supports a main rod 26 of a third ladder of a third series and has a U-shaped cross section with one side 2 opened. The main body 1, an elastic leaf spring 3 in which the middle part is fixed to the approximately central portion of the U-shaped inner bottom of the metal fitting body, and the upper and lower pieces are bent in a U shape toward the opening of the U shape, and on the upper part of the metal fitting body. Has a bulging receiving part 4 at the bottom and a mounting part 5 at the upper part, and a supporting metal fitting 6 pivotally attached to a screw metal fitting 9 fixed to the latch metal body is movably mounted in a U-shape of the metal fitting body. A tongue-shaped holding metal fitting 7 is rotatably provided at the bottom of the metal fitting body, and the support fitting 6 is pushed by the elastic leaf spring 3 toward the U-shaped opening of the metal fitting body to project from the metal fitting body. Is attached to. The leaf spring 8 adjusts the operation of the pressing metal fitting 7 when it is moved downward.

As shown in the plan view of FIG. 5, the ladder body to which the hooks are attached always has main rods 24, 25, 26, horizontal rods 27, 28, 29, and support rods 30, 31, 32, respectively. A frame-shaped first ladder 21, a second ladder 22, and a third ladder 23 are sequentially incorporated, but when extending the ladder body, as shown in FIGS. 9 and 10, the first ladder normally connected to the uppermost stage is used. The 3rd ladder 23 is continuously connected to the upper part of the 2nd ladder 22 using the rope w and the pulley c, and then the 2nd ladder is pushed up to the upper stage of the 1st ladder 21 to form a 3rd ladder. However, when the third ladder is first moved upward, the first ladder 21 of the first series and the second ladder 22 of the second series are installed in the same position side by side, so that the third ladder 23 of the third series is installed. 11, the pressing metal fitting 7 is moved upward as shown in FIG. 11 and is pushed up from below through the support rod 28 of the second ladder 22 to rotate the pressing metal fitting upward so that the upper supporting metal fitting 6 is elastic leaf spring. After pushing it into the hook body 1 against the pressing force of 3, the third ladder is moved up, then the second ladder is moved up and connected to the upper part of the first ladder to form a triple ladder. . However, the tip of the tongue-shaped holding metal fitting 7 which is upright by pushing up the holding metal fitting 7 by the force of the ladder support rod 28 which rises rapidly when the third ladder moves up is arranged in the same position as shown in FIG. There may be a case where it gets stuck between the support rods 27 of the ladder and the support rods 28 of the second ladder, and it becomes impossible to move up and down the third ladder, which may result in a functional accident.

[0004]

[Problems to be solved by the present invention]

 Therefore, in order to solve the above-mentioned functional difficulty of the previously proposed latch, it is necessary to improve the latch mechanism that is pushed upright by the upward movement of the third ladder. The problems to be solved by the present invention are firstly that the above-mentioned difficulties are functionally eliminated, secondly that the manufacturing cost is low and practical, not a complicated mechanism, and thirdly, the new mechanism is repairable. The subject was to make it easy to replace and help prevent functional deterioration and breakdown.

[0005]

[Means for Solving the Problems]

 As means for achieving the above-mentioned object, a rectangular locking metal fitting body having a hollow U-shaped cross section, and an intermediate portion fixed to a substantially central portion of the U-shaped hollow inner bottom of the locking metal fitting main body, and the upper and lower sides are fixed. An elastic leaf spring bent in the direction of the U-shaped opening of the latching metal, and a lower part formed in a concave shape, and the base is rotatably attached to the upper part of the U-shaped hollow of the latching metal body. A supporting metal fitting that is pressed by the elastic leaf spring and can freely move in and out of the U-shaped opening of the metal fitting body, and is pivotally attached to the inside of the U-shaped hollow of the latch metal fitting body so that it can be pivotally attached to the outside of the metal fitting. A support bracket that is bent into a tongue shape and protrudes, and when the support rod of the second ladder moves upward, the tip of the support bracket that protrudes from the upper part of the opening of the latch bracket body is pushed into the opening of the bracket body. It is pushed back downward by the reaction of the elastic leaf spring that presses. In the retaining metal fitting attached to the third ladder of the three-tiered ladder, an elastic stopper adjusting piece for restraining the upward rotation of the pressing metal fitting piece is detachably attached to the upper part of the pressing metal fitting piece to hold it. It is necessary to adjust so that the vertical movement of the ladder will not be locked by being caught between the support rods of the first ladder and the second ladder when the metal piece piece rotates upward in the upright state.

[0006]

[Embodiment] 【Example】

 An embodiment of the present invention will be illustrated and described below. 1 is a cutaway front view of a latching metal fitting of the present invention, FIG. 2 is a right side view of the latching metal fitting, FIG. 3 is a sectional view of an opening of the latching metal body, and FIG. 4 is a plan view of the latching metal fitting. In the drawing, reference numeral 10 denotes a metal-machined rectangular body which has been subjected to a corrosion-resistant treatment with a main body of a latch, and an opening 11 is provided except for an upper portion on the right side surface, and a main body is formed into a hollow 12 as shown in FIG. It has a rectangular parallelepiped shape and each mechanism is mounted in the hollow 12. An integrated elastic leaf spring 13 curved in a substantially central portion is fixed to a hollow inner bottom 10a in the main body with a screw fitting 14, and the upper piece 13a and the lower piece 13b are bent and attached in the opening 11 direction of the main body. Reference numeral 15 is a support fitting pivotally attached to the upper part of the main body by a fixing screw 16. The support fitting has a support portion 17 formed at a lower portion thereof and is pivotally movable in the main body, and normally protrudes from the opening portion 11 while being pressed by the upper piece 13a of the elastic leaf spring 13. Reference numeral 18 is a tongue-shaped holding metal fitting attached to the lower portion of the latch metal body 10 and is rotatably movably pivoted by a screw 19 so as to project outside the metal body. The retainer 18 normally protrudes downward from the main body of the metal, supports the lower portion by the elastic leaf spring 13b, and is pushed up by the support rod of the ladder body which moves upward. Numeral 20 is a stopper metal fitting composed of a wave-shaped elastic leaf spring and is fixed in the latch metal fitting together with the elastic leaf spring 13 by the screw metal fitting 14 and close to the upper part of the holding metal fitting 18 to rotate the pressing metal fitting upward. Mounted to adjust. The stopper fitting 20 is detachably attached together with the elastic leaf spring 13 by the screw fitting 14, and the leaf spring can be freely adjusted and replaced by deterioration of the function.

Explaining the operation of the latching metal, the latching metal 10 mounted on the support rod 32 of the third ladder 23 is constructed by first connecting the second ladder 22 of the second row to the rope as shown in FIGS. 7 and 8. Then, the holding metal fitting 18 which is moved upward by the pulley and projected by the support rod 31 is rotated upward, the supporting metal fitting 15 is pushed into the main body 10 of the latching metal, and then the third ladder is moved upward to move the upper part of the second ladder. Connect to. However, when the second ladder suddenly rises, the pushing-up force of the support rod 31 of the ladder body causes the holding metal fitting 18 to rotate in an upright state and is assembled in a parallel manner, and the support rod 31 of the second ladder 22 and the first ladder 21. The elastic stopper fitting 20 prevents and adjusts the sudden turning of the holding fitting 18 so as not to bite between it and the support rod 30. Even when the third ladder 23 moves downward, the holding metal fitting 18 is pushed up by the push-up action of the support rod 31 of the second ladder, and it is locked by being caught between the support rods as in the case of the upward movement. Adjust so that the stopper metal fitting 20 restrains the holding metal fitting.

[0008]

【effect】

 The latching device of the present invention has been improved to a mechanism that eliminates the above-mentioned conventional problems by providing an elastic stopper metal fitting in the latching member, so that the connecting operation of the triple ladder body can be smoothly operated in an emergency. There is an advantage. In addition, the stopper metal fittings are provided as a practical ladder body that is effective and safe in terms of structural strength and can be freely attached and detached by preventing the lock action that interferes with the vertical movement of the ladder body by adjusting the holding metal fittings. it can.

[Brief description of drawings]

FIG. 1 is an overall cross-sectional view of a latch according to the present invention.

FIG. 2 is a left side view of the latch metal body.

FIG. 3 is an end cross-sectional view of a latch metal body.

FIG. 4 is a plan view of FIG. 1;

FIG. 5 is a plan view of the ladder body showing the attachment of the latch.

FIG. 6 is an enlarged partial plan view of FIG.

FIG. 7 is an overall cross-sectional view showing the action of the latching fitting by the ladder body.

FIG. 8 is an overall cross-sectional view showing a working relationship between a ladder body and a latch.

FIG. 9 is an overall front view of a triple ladder.

FIG. 10 is a side view of FIG. 9.

FIG. 11 is an overall view showing the operation of a conventional hook and a ladder body.

[Explanation of symbols]

 10 Hooks 11 Openings 12 Hollows 13 Elastic leaf springs 14 Screw fittings 15 Support fittings 16 Fixing screws 17 Supports 18 Holding fittings 19 Screws 20 Stopper fittings 21 1st ladder 22 2nd ladder 23 3rd ladder 24 1st ladder Main rod 25 Second ladder main rod 26 Third ladder main rod 27 First ladder horizontal rod 28 Second ladder horizontal rod 29 Third ladder horizontal rod 30 First ladder support rod 31 Second ladder support rod 32 Third ladder support rod w rope c pulley

Claims (1)

[Scope of utility model registration request] 1. A rectangular hook metal body having a U-shaped cross section and a hollow body, and an intermediate portion fixed to a substantially central portion of a U-shaped hollow inner bottom of the hook metal body, and the upper and lower pieces are hooked. An elastic leaf spring curved in the direction of the U-shaped opening of the metal fitting and a lower part formed in a concave shape, and the base is rotatably pivotally attached to the upper part of the U-shaped hollow of the latch metal body and pressed against the elastic leaf spring. And a supporting metal fitting that can be freely moved in and out from the U-shaped opening of the metal fitting body and a pivoting member that is rotatably pivoted in the U-shaped hollow of the hanging metal fitting body and protrudes downward from the hanging metal fitting body in a curved shape. 2 When it is moved up by the pushing force of the ladder support rod, the tip of the supporting metal fitting protruding from the upper part of the opening of the latch metal fitting body is pushed into the opening of the metal fitting body, and by the reaction of the supporting metal fitting pressed by the elastic leaf spring. Attach it to the 3rd ladder of the triple ladder consisting of the pressing metal piece that is pushed back downward. In the hanging metal fitting, when an elastic stopper adjusting piece for adjusting the upward rotation of the pressing metal fitting piece is detachably attached to the upper portion of the pressing metal fitting piece and the pressing metal fitting piece is rotated upward in an upright state, The holding metal fitting for the hooking metal fitting attached to the third ladder of the triple ladder, characterized in that the holding metal fitting piece is adjusted so as not to lock up and down movement of the ladder by biting between the supporting rods of the first ladder and the second ladder. Mechanism to prevent bite of one side.