CN201094818Y - Self-locking safety hook - Google Patents

Abstract

The utility model discloses a from locking-type safety hook, the locking mouth has on its coupler body, the one end of locking mouth is equipped with the tenon, the retaining ring is fixed at the end of tenon, the button of unblanking passes the tenon setting, the other end of locking mouth passes through pivot installation and the corresponding connecting rod of tenon, the connecting rod head has the tenon with tenon matched with, be equipped with connecting rod reset spring in pivot department, the outer tube sleeve is fixed outside the connecting rod and with the connecting rod, the locking sleeve that can stretch out and draw back is installed to the installation between outer tube and connecting rod, locking sleeve reset spring is equipped with to the locking sleeve bottom, the locking sleeve middle part outside is equipped with has elastic stopping steel sheet, be equipped with the stopping hook that corresponds with the stopping steel sheet on the outer tube top. The utility model provides a torsional type and screw thread formula locking device's work efficiency low, unblank and lock inconvenient shortcoming, make and link to press the pole closure to go on in step with the locking, do not have the secondary locking action, it is very convenient to use.

Description

self-locking carabiner

technical field

The utility model relates to a safety device, in particular to a safety hook used on a safety belt.

Background technique

The safety belt is an essential safety equipment for construction personnel. The safety belt is equipped with a locking device, that is, a safety hook, which is used to lock the safety rope to complete high-altitude operations. The safety hooks on the existing seat belts are mainly twisted and threaded. Both kinds of safety hooks lock the connecting rod at the fixed end through the locking sleeve at the movable end to achieve the locking purpose. The difference between the two is that one is through the locking sleeve. The twisting operation locks it with the connecting rod, and the other uses a nut to fix the locking sleeve and the connecting rod through a threaded connection. However, in practical applications, operators who use twist-lock safety hooks often never twist the locking sleeve to lock the connecting rod of the safety hook during operation. The locking sleeve of individual safety hooks has been severely deformed and cannot be rotated. There are two main reasons for locking the safety hook: one is frequent movement during operation, and it is inconvenient to unlock and lock the locking device. The 2nd, the locking sleeve pipe of safety hook is relatively thin, is subjected to external force and easily produces deformation, and then can't twist and play locking effect after deformation. The use of threaded safety hooks also has the problem of inconvenient unlocking and locking because the nut needs to be screwed in and out.

Utility model content

The technical problem to be solved by the utility model is to provide a self-locking safety hook which is safe, reliable and convenient to operate.

A self-locking safety hook described in the utility model is characterized in that it includes a retaining ring, an unlock button, a stop steel plate, an outer sleeve, a locking sleeve return spring, a connecting rod return spring, a hook body, and a connecting tenon. , a locking sleeve, a connecting rod, a pivot pin and a stop hook, the hook body has a locking opening, one end of the locking opening is provided with a connecting tenon, the retaining ring is fixed at the end of the connecting tenon, and the other end of the locking opening is The connecting rod corresponding to the connecting tenon is installed through the pivot pin, the head of the connecting rod has a tenon matching the connecting tenon, the connecting rod return spring is arranged at the pivot pin, the outer sleeve is set outside the connecting rod and fixed with the connecting rod, A retractable locking sleeve is installed between the outer sleeve and the connecting rod. A locking sleeve return spring is installed at the bottom of the locking sleeve. An elastic anti-retraction steel plate is provided on the outer side of the middle of the locking sleeve. The anti-retraction hook corresponding to the anti-retraction steel plate.

An unlock button can be installed on the anti-retreat steel plate, and pressing the unlock button inwardly can drive the anti-retreat steel plate to shrink inwardly.

Working principle: When locking is required, press down the locking sleeve, and the connecting rod rotates around the pivot pin under the action of the connecting rod return spring. , at this time, under the action of the locking return spring, the locking sleeve slides upwards along the connecting rod until the upper end surface contacts the retaining ring on the hook body. At this time, the locking sleeve fits the connecting rod and the connecting tenon inside it; At the same time, the anti-retraction steel plate bounces up and pushes against the anti-retraction hook of the outer sleeve to lock the locking sleeve. The anti-retraction hook has an inward groove to prevent the locking sleeve from falling off to complete the locking action. The main function of the retaining ring is to protect the locking sleeve, and the outer sleeve is welded on one end of the connecting rod shaft pin to fix the locking sleeve and the sleeve return spring. When the lock needs to be unlocked, press the unlock button, and the unlock button presses the anti-retraction steel plate to retract into the outer casing, and then pushes the locking sleeve downward, when the upper end of the locking sleeve reaches the connection position between the main hook and the connecting rod, Push the connecting rod into the hook body, the connecting rod rotates around the pin, the connecting tenon is separated, and the safety hook is opened.

The utility model fundamentally solves the shortcomings of low working efficiency and inconvenient unlocking and locking of twisting and threaded locking devices. The closing and locking of the double-click lever are synchronized, and there is no secondary locking action. When the connecting rod is closed, the locking device automatically locks in place. When unlocking, press the unlock button, and at the same time push the locking sleeve along the direction of the outer casing. When the locking sleeve reaches the unlocked position, the connecting rod can be opened. The utility model is safe and reliable through a tensile test of 2000kg, and the locking device works normally. Ask the on-site operators to verify the actual operation, and think that it is easy to use and reliable.

Description of drawings

Fig. 1 is a locking state diagram of the utility model;

Figure 2 is a diagram of the open state of the utility model.

In the figure: 1-retaining ring, 2-unlock button, 3-return stop steel plate, 4-outer sleeve, 5-return spring for locking sleeve, 6-return spring for connecting rod, 7-hook body, 8-link tenon, 9-Lock sleeve, 10-Connecting rod, 11-Axis pin, 12-Stop hook.

Detailed ways

As shown in Figures 1 and 2, a self-locking safety hook includes a retaining ring 1, an unlock button 2, a backstop steel plate 3, an outer sleeve 4, a locking sleeve return spring 5, a connecting rod return spring 6, Hook body 7, connecting tenon 8, locking sleeve 9, connecting rod 10, shaft pin 11 and stop hook 12, wherein the hook body 7 has a locking opening, the upper end of the locking opening is designed as connecting tenon 8, retaining ring 1 Fixed on the end of the connecting tenon 8, the anti-retraction steel plate 3 is equipped with an unlocking button 2, and the other end of the locking port is installed with a connecting rod 10 through a pivot pin 11. The connecting rod 10 is corresponding to the connecting tenon 8, and its head has a The tenon that connects the tenon 8 is matched with the tenon, and the connecting rod return spring 6 is provided at the shaft pin 11, one end of which is fixed on the shaft pin, and the other end is fixed on the outer casing 4, which is set outside the connecting rod 10 and fixed with the connecting rod 10, and is fixed on the outer casing. A retractable locking sleeve 9 is installed between the pipe 4 and the connecting rod 10, the locking sleeve return spring 5 is installed at the bottom of the locking sleeve 9, and an elastic anti-retreat steel plate 3 is provided on the outside of the middle of the locking sleeve 9. 4. The top is provided with a backstop hook 12 corresponding to the backstop steel plate 3, and the backstop hook 12 has a groove to prevent the locking sleeve from falling off.

Claims (3)

1. A self-locking safety hook, characterized in that it includes a retaining ring (1), an unlock button (2), a backstop steel plate (3), an outer casing (4), and a locking casing return spring (5) , connecting rod return spring (6), hook body (7), connecting tenon (8), locking sleeve (9), connecting rod (10), shaft pin (11) and back-stop hook (12), the hook The body (7) has a locking opening, one end of the locking opening is provided with a connecting tenon (8), the retaining ring (1) is fixed on the end of the connecting tenon (8), and the other end of the locking opening passes through the shaft pin (11) Install the connecting rod (10) corresponding to the connecting tenon (8), the head of the connecting rod (10) has a tenon that matches the connecting tenon (8), and the connecting rod return spring (6 ), the outer sleeve (4) is sleeved outside the connecting rod (10) and fixed with the connecting rod (10), and a retractable locking sleeve (9) is installed between the outer sleeve (4) and the connecting rod (10), locking The bottom of the sleeve (9) is equipped with a locking sleeve return spring (5), and an elastic stop steel plate (3) is provided outside the middle of the lock sleeve (9). The backstop hook (12) corresponding to the steel plate (3). 2. The self-locking safety hook according to claim 1, characterized in that: there is a groove on the anti-retraction hook (12) to prevent the locking sleeve from falling off. 3. The self-locking safety hook according to claim 1 or 2, characterized in that: an unlock button (2) is installed on the anti-retraction steel plate (3).

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