Protective door self-locking device

Abstract

A protective door self-locking device comprises a locking piece and a locking strip, the locking piece comprises a base, and the base is provided with a locking component in a hinged mode; the locking component comprises inserting rods inserted into the two ends of the hinged through hole, the two inserting rods are integrally bent and extend to form two relatively parallel first connecting rods, and the tail ends of the first connecting rods are bent, inclined upwards and integrally extend to form second connecting rods. The lap joint cross rod is integrally connected to the tail ends of the two second connecting rods; the length of the locking strip is larger than the width of the locking component, and the locking strip is movably arranged on the side edge of the locking component. Compared with a mortise lock in the prior art, the safety is higher, particularly, compared with a locking mode that the mortise lock is matched with a mechanical lock, the use mode is simpler, opening and closing time is short, and one-way locking of the door plate can be achieved while the door plate is closed. And the equipment is simple in structure, low in manufacturing cost, low in maintenance cost and higher in safety popularization value.

Description

Technical Field

[0001] The utility model relates to the field of safety door locks, in particular to a self-locking device for a protective door. Background Art

[0002] Protective doors are commonly used in chemical, coal mining, thermal power and other production enterprises. Their significance lies in one-way locking and instantaneous locking to prevent people inside the door from escaping from the protective door due to accidental touch or tilting of goods. Specific application equipment includes hoist-mounted cages and mine elevators.

[0003] Commonly, in the prior art, the locking mechanism for the protective door is usually a personnel-controlled mortise lock, but the mortise lock is generally a sliding mechanism, which has high risks in use and requires an additional independent mechanical lock for locking. This leads to cumbersome operation procedures and long opening and closing time during use. There is currently no corresponding solution to the above situation. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a protective door self-locking device which has a simple structure, fast locking, and can directly achieve one-way locking after locking to prevent the protective door from opening from the inside to the outside, especially a simple to use protective door self-locking device.

[0005] The device includes a lock and a locking strip;

[0006] The lock comprises a base, the base is provided with a hinged through hole, and a locking member is hingedly arranged in the hinged through hole;

[0007] The locking member comprises a plug-in rod inserted into the two ends of the hinged through hole, and the two plug-in rods are integrally bent and extended, and two relatively parallel first connecting rods are provided, and the ends of the first connecting rods are bent, and the second connecting rods are integrally extended upwardly; at the ends of the two second connecting rods, a lap cross bar is integrally connected and provided, and the lap cross bar is provided against the upper surface of the base;

[0008] The locking strip is longer than the width of the locking component and is movably arranged on the side of the locking component.

[0009] The beneficial effects of the utility model are: compared with the mortise lock in the prior art, the utility model is safer, especially compared with the locking form of the mortise lock combined with the mechanical lock, the usage is simpler, the opening and closing time is short, and the door panel can be locked in one direction while the door panel is closed. The equipment has a simple structure, low cost, low maintenance cost, and has greater safety promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a front view of a self-locking device for a protective door in a locked state according to the utility model;

[0011] Figure 2 This is a front view of a self-locking device for a protective door in a non-locking state according to the utility model;

[0012] Figure 3 is based on Figure 1 or Figure 2 Schematic diagram of the assembly structure of the direction;

[0013] Figure 4 is based on Figure 1 or Figure 2 Angle, side view direction of the operating principle diagram, is also a structural diagram of embodiment 1;

[0014] Reference numerals:

[0015] 1-mounting base 2-locking strip 3-base 4-locking member

[0016] 21-Rotation sleeve

[0017] 41- plug-in rod 42- first connecting rod 43- second connecting rod 44- overlapping cross bar 45- counterweight

[0018] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0019] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 , a self-locking device for a protective door described in the utility model comprises a locking element and a locking strip;

[0020] The lock comprises a base, the base is provided with a hinged through hole, and a locking member is hingedly arranged in the hinged through hole;

[0021] The locking member comprises a plug-in rod 41 inserted into both ends of the hinged through hole, and two relatively parallel first connecting rods 42 are provided by the two plug-in rods 41 being bent and extended as a whole, and the ends of the first connecting rods 42 are bent, and a second connecting rod 43 is integrally extended and arranged upwardly; at the ends of the two second connecting rods 43, a lap cross bar 44 is integrally connected and arranged, and the lap cross bar 44 is arranged against the upper surface of the base;

[0022] The locking strip is longer than the width of the locking component and is movably arranged on the side of the locking component.

[0023] Example 1, refer to the accompanying drawings of the specification Figure 4The locking strip is fixedly arranged on the door panel, the base part in the lock is fixedly arranged on the door frame, and the longitudinal assembly position of the locking strip is lower than the base and higher than the lowest point where the first connecting rod 42 and the second connecting rod 43 are connected.

[0024] The low point mentioned here refers to the low point of the connection position between the first connecting rod 42 and the second connecting rod 43 when the locking member is in a naturally drooping state, that is, when the overlapping cross bar 44 is in contact with the upper surface of the base.

[0025] The effect achieved by this is: the locking strip and the lock are respectively assembled on the door panel and the door frame, and the locking strip is displaced by pushing the door panel, and the locking strip contacts the outside of the first connecting rod 42, and the door panel is continuously pushed, and the locking member rotates and moves upward, until the door panel fits the door frame, the locking strip is separated from the locking member, and the locking member slides back down, and the overlapping cross bar 44 and the base are used as limit positions to prevent the locking member from rotating in the opposite direction, that is, to achieve a locking effect. When opening the door, the locking member can be rotated from the outside of the door to open the door.

[0026] In the second embodiment, a mounting base plate is fixedly provided on the locking strip, and an assembly hole is provided on the mounting base plate.

[0027] In embodiment 3, the plug-in rod 41 is loosely matched with the hinge through hole; the inner surfaces of the two first connecting rods 42 are arranged close to the base;

[0028] The included angle between the first connecting rod 42 and the second connecting rod 43 is an obtuse angle, and the length of the second connecting rod 43 is not greater than that of the first connecting rod 42 .

[0029] The effect achieved in this way is that when the door panel is pushed, the locking strip part pushes the locking component to rotate smoothly.

[0030] In embodiment 4, the locking strip is provided with a rotating sleeve, and the rotating sleeve is set corresponding to the width of the locking member, so that the locking strip part pushes the locking member to rotate smoothly.

[0031] Example 5, see the attached specification Figure 3 A counterweight block 45 is integrally arranged on the overlapping cross bar 44, and the counterweight block 45 is provided with anti-slip grooves.

[0032] There are two effects achieved by this. One is to increase the counterweight to prevent the locking bar from hitting the locking component too hard when closing the lock, causing the locking component to flip too much, and provide further protection when in use; the other is to use it as a handle when unlocking the lock.

[0033] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims.

[0034] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A self-locking device for a protective door, comprising a locking element and a locking strip, characterized in that: The lock comprises a base, the base is provided with a hinged through hole, and a locking member is hingedly arranged in the hinged through hole; The locking member comprises a plug-in rod inserted into the two ends of the hinged through hole, and the two plug-in rods are integrally bent and extended, and two relatively parallel first connecting rods are provided, and the ends of the first connecting rods are bent, and the second connecting rods are integrally extended upwardly; at the ends of the two second connecting rods, a lap cross bar is integrally connected and provided, and the lap cross bar is provided against the upper surface of the base; The locking strip is longer than the width of the locking component and is movably arranged on the side of the locking component.

2. A self-locking device for a protective door according to claim 1, characterized in that: The locking strip is fixedly arranged on the door panel, the base part in the lock is fixedly arranged on the door frame, and the longitudinal assembly position of the locking strip is lower than the base and higher than the lowest point where the first connecting rod and the second connecting rod are connected.

3. A self-locking device for a protective door according to claim 1, characterized in that: A mounting base plate is fixedly arranged on the locking strip, and an assembly hole is arranged on the mounting base plate.

4. A self-locking device for a protective door according to claim 1, characterized in that: The plug-in rod is clearance-matched with the hinge through hole; the inner surfaces of the two first connecting rods are arranged close to the base; The included angle between the first connecting rod and the second connecting rod is an obtuse angle, and the length of the second connecting rod is not greater than that of the first connecting rod.

5. A self-locking device for a protective door according to claim 1, characterized in that: The locking strip is provided with a rotating sleeve, and the rotating sleeve is arranged corresponding to the width of the locking component.

6. A self-locking device for a protective door according to claim 1, characterized in that: A counterweight block is integrally arranged on the overlapping cross bar, and anti-slip grooves are arranged on the counterweight block.

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