KR102555987B1 - Automatic falling prevention apparatus for up-down door - Google Patents

Abstract

The present invention relates to a device for preventing a sudden drop of an up-down door, and when the door rapidly drops to the ground due to an unexpected malfunction of the up-down door or a break in an elevator cable connecting the door frame, the rapidly falling door is stopped to prevent damage to the up-down door. And it is an object of the present invention to provide an up-down door anti-falling device to prevent damage to objects located under the door and safety accidents of workers.

Description

Plunging prevention device of up-down door {AUTOMATIC FALLING PREVENTION APPARATUS FOR UP-DOWN DOOR}

The present invention relates to a device for preventing a sudden drop of an up-down door, and more particularly, when a door rapidly drops to the ground due to an unexpected malfunction of the up-down door or a break in an elevator cable connecting the door frame, the rapidly falling door is stopped. It relates to a device for preventing a sudden fall of an up-down door to prevent damage to a door, damage to objects located under the door, and safety accidents of workers.

As is well known, an up-down door is generally a type of large door made of steel structure, and is also called a big door, a grand door, or an up-down door, and is a type of door that requires entry and exit of large products such as block production It is widely installed and used in shipyards, large factories in heavy industry, aircraft hangars, and large logistics storage warehouses.

In such a door, a door body to which a screen made of mesh or cloth is attached to one side, both guide rails for guiding the up and down of the door body, and a wire drum for hanging the door body up and down by wire are installed on both drive shafts of the geared motor, respectively. It is made by being equipped with components such as a power drive unit and a controller that controls the operation of the power drive unit.

The door body of the up-down door is generally made and installed as a heavy large door having a weight of about 10 to 30 tons, and a conventional up-down door opening and closing device for driving the door body of this weight is installed at both ends of the lower truss of the door body, respectively. It operates by binding only the wire.

However, if either end of the lower truss of the door body is towed with wires wound on both wire drums one by one, and either wire is old and cut while the door body is being moved up and down, the door body will be subjected to a heavy load on one side. There was a serious problem that it would fall and cause a major accident.

The present invention has been made in view of the above-described prior art, and when the door rapidly falls to the ground due to an unexpected malfunction of the up-down door or a break in the lifting cable connecting the door frame, the up-down door is stopped by rapidly dropping the door. Its purpose is to provide a device for preventing the up-down door from falling to prevent damage to objects located at the bottom of the door and safety accidents of workers.

In order to achieve the above object, according to a preferred embodiment of the present invention and the upper truss configured at the top of the door; A door frame coupled to a plurality of horizontally spaced apart at regular intervals from the ground and suspended from an elevating wire, and a lower truss coupled to a lower end of the door frame; A guide pulley connected to the upper truss and the lower truss and guiding the up and down movement of the door frame, a wire drum for lifting the door frame by suspending it with a wire for lifting, and a geared motor axially coupled to the wire drum to generate driving force. for up-down door devices; first reduction pulleys and second reduction pulleys installed on the top of the upper truss to be spaced apart from each other up and down, and having a traction wire for preventing plunge falling around the outer periphery; Located between the first reduction pulley and the second reduction pulley, the anti-dropping traction wire is wound around the outer periphery and operated. There is provided a plunge prevention device for an up-down door which is composed of a plunge prevention pulley closely adhered to between deceleration pulleys and prevents downward loosening of a plunge prevention traction wire.

Preferably, when the up-down door device is in normal operation, the anti-dropping pulley includes a positioning spring for providing elastic force to be spaced apart from the first deceleration pulley and the second deceleration pulley by a predetermined distance. device is provided.

Preferably, coupling holes to which both hinge shafts of the first reduction pulley and the second reduction pulley are coupled are formed, and a support plate formed with guide holes is fixed to the upper truss so as to be able to move left and right while the plunge prevention pulley is fastened. There is provided a plunge prevention device for the up-down door, characterized in that configured to be.

Preferably, there is provided a plunge prevention device for the up-down door, characterized in that a plurality of each formed at both ends of the up-down door device.

Preferably, the plunge-preventing traction wire has one end coupled to the lower truss regardless of the lifting wire, and a weight coupled to the other end, and the weight is guided by a weight guide. A door plunge prevention device is provided.

Preferably, a flow hole formed with a coupling ball that is recessed into the guide hole formed in the support plate, slides, is coupled to one end of the positioning spring, and is coupled to the hinge axis of the anti-plunging pulley; There is provided a plunge prevention device for an up-down door, characterized in that a fixture fixed at a position spaced apart from the guide hole by a predetermined length and coupled to the other end of the positioning spring is further configured.

When the lower truss and the door frame unintentionally drop due to the cutting of the lifting wire coupled to the door frame, the traction force of the traction wire for preventing the plunge coupled to the lower truss. It is applied to the drop-prevention pulley, whereby the drop-prevention pulley is sandwiched between the first and second reduction pulleys to prevent the lower truss from plummeting, thereby preventing various safety accidents and breakage accidents.

1 is a front view showing an up-down door in which a plunge prevention device is installed according to an embodiment of the present invention;
2 is an enlarged front cross-sectional view showing a device for preventing a sudden drop of an up-down door according to an embodiment of the present invention;
Figure 3 is an exploded perspective view showing a plunge prevention device for an up-down door according to an embodiment of the present invention;
Figure 4 is a front cross-sectional view showing the operating state of the plunge prevention device when the up-down door is normally driven according to an embodiment of the present invention;
Figure 5 is a front cross-sectional view showing an operating state of the plunge prevention device during emergency operation of the up-down door according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the drawings.

1 is a front view showing an up-down door equipped with a plunge prevention device according to an embodiment of the present invention, and FIG. 2 is an enlarged front cross-sectional view showing a plunge prevention device for an up-down door according to an embodiment of the present invention. 3 is an exploded perspective view showing a device for preventing a sudden drop of an up-down door according to an embodiment of the present invention.

Referring to this, the up-down door plunge prevention device 2 according to an embodiment of the present invention rapidly drops when the door rapidly falls to the ground due to an unexpected malfunction of the up-down door or a break in the lifting cable connecting the door frame. It is a device to prevent damage to up-down doors, damage to objects located under the doors, and safety accidents of workers by stopping the door.

More specifically, the up-down door plunge prevention device 2 according to an embodiment of the present invention is a device that is formed in plurality at both ends of the up-down door device 30 to prevent the door frame 35 from plummeting, The up-down door device 30 applied to the present invention includes an upper truss 32 configured at the top of the door like a conventional up-down door device; a door frame 35 spaced horizontally from the ground at regular intervals and coupled to hang on a lifting wire, and a lower truss 34 coupled to a lower end of the door frame 35; It is configured to include a guide pulley 36 coupled to the upper truss 32 and the lower truss 34 to guide the vertical elevation of the door frame 35 .

In addition, the up-down door device 30 has a power drive unit 40 configured to generate power for raising and lowering the door frame 35 at a predetermined portion in the center of the upper surface of the upper truss 32, the power drive unit ( 40) is composed of a wire drum 44 that lifts the door frame 35 by suspending it with a wire 37 for lifting, and a geared motor 42 that is axially coupled to the wire drum 44 and generates driving force.

On the other hand, the anti-dropping device 2 of the up-down door according to an embodiment of the present invention is installed vertically and spaced apart from each other on the top of the upper truss 32, and the anti-plunging wire 26 is wound around the outer periphery. a first reduction pulley 18 and a second reduction pulley 20; Positioned between the first reduction pulley 18 and the second reduction pulley 20, the traction wire 26 for preventing plunge traction wire 26 is wound around the outer periphery and operated. When the traction force of (26) increases, it is composed of a plunge prevention pulley 22 that is in close contact between the first deceleration pulley 18 and the second deceleration pulley 20 to prevent downward loosening of the anti-slump traction wire 26. do.

Preferably, the traction wire 26 for preventing plunge 26 is wound around the left half of the outer circumference of the first reduction pulley 18 based on FIG. After being wound in close contact with the right half, it is wound while riding on the upper part of the outer circumference of the second reduction pulley 20, and is wound downward while being closely attached to the left side.

Therefore, when the anti-slung pulley 22 is positioned at a predetermined distance from the first deceleration pulley 18 and the second deceleration pulley 20, the anti-slung pulley 26 normally moves along the first deceleration pulley. (18), the plunge prevention pulley 22 and the second deceleration pulley 20 are wound around the outer periphery, respectively, and transported.

On the other hand, when the door frame 35 plunges due to an accident such as cutting of the lifting wire 37, it plunges between the fixed first deceleration pulley 18 and second deceleration pulley 20. The prevention pulley 22 comes into close contact with the first reduction pulley 18, the plunge prevention pulley 22, and the second reduction pulley 20 so that the anti-plunge traction wire 26 is no longer transported. will not be able to

In this case, as a result, the first reduction pulley 18, the anti-plunging pulley 22 and the second reduction pulley 20 hold the anti-plunging traction wire 26 from being transported, thereby The lower truss 34 coupled to the lower end of the plunge-preventing traction wire 26 also does not descend any more.

At this time, the device 2 for preventing a sudden drop of an up-down door according to an embodiment of the present invention removes the first deceleration pulley 18 and the second deceleration pulley 20 from the first deceleration pulley 18 and the second deceleration pulley 20, unless the door frame 35 is rapidly falling. The anti-plunging pulley 22 is positioned at a certain distance and the anti-plunging traction wire 26 should normally be transported. In normal operation, a positioning spring 12 is included so that the anti-slung pulley 22 is spaced apart from the first deceleration pulley 18 and the second deceleration pulley 20 by a predetermined distance.

If the door frame 35 is rapidly falling, the anti-plunging pulley 22 can move with respect to the fixed first reduction pulley 18 and the second reduction pulley 20, so that the first reduction pulley (18) and the second reduction pulley (20), and is sandwiched between the first reduction pulley (18) and the second reduction pulley (20).

To this end, in the up-down door anti-dropping device 2 according to an embodiment of the present invention, coupling holes are formed in which both hinge shafts of the first reduction pulley 18 and the second reduction pulley 20 are coupled, respectively. , In the state in which the plunge prevention pulley 22 is fastened, it is configured to include a support plate 4 on which a guide hole 8 is formed so as to be able to move left and right, and the support plate 4 is fixed to the upper truss 32.

Preferably, in the anti-falling device 2 of the up-down door according to an embodiment of the present invention, the guide hole 8 formed in the support plate 4 is recessed and slid, and one end of the positioning spring 12 is coupled, A flow hole 10 having a coupling hole 10a to which the hinge shaft 24 of the plunge prevention pulley 22 is coupled; A fixture 14 fixed to a position spaced apart from the guide hole 8 by a predetermined length and coupled to the other end of the positioning spring 12 is further configured.

On the other hand, one end of the plunge-preventing traction wire 26 is coupled to the lower truss 34 regardless of the lifting wire 37, and a weight 28 is coupled to the other end, and the weight 28 ) is guided by the weight guide 29.

The functions and actions of the up-down door anti-slumping device according to an embodiment of the present invention having the above configuration will be described in detail with reference to the accompanying drawings.

Figure 4 is a front cross-sectional view showing an operating state of the plunge prevention device when the up-down door is normally driven according to an embodiment of the present invention, Figure 5 is a plunge prevention device when the up-down door is emergency driven according to an embodiment of the present invention It is a cross-sectional view showing the operating state.

First, in the up-down door anti-falling device 2 according to an embodiment of the present invention, as shown in FIG. 4, unless the door frame 35 is rapidly falling, the hinge of the anti-plunging pulley 22 In the state in which the shaft 24 passes through the guide hole 8, it is coupled again through the coupling hole 10a of the flow hole 10, and the fixture 14 is spaced a certain distance from the flow hole 10 is fixed to the support plate 4, one end of the positioning spring 12 is coupled to the fixture 14, and the other end is fixed to the flow hole 10, so the plunge prevention pulley 22 has a certain elasticity It is positioned at a predetermined distance from the first deceleration pulley 18 and the second deceleration pulley 20 by restoring force.

Therefore, the traction wire 26 for preventing plunge is normally wound around the outer circumferences of the first reduction pulley 18, the prevention pulley 22, and the second reduction pulley 20 and transported.

On the other hand, when the door frame 35 plunges due to an accident such as cutting of the lifting wire 37, the load of the lower truss 34 and the door frame 35 is applied to the traction wire 26 for preventing the sudden drop. ), so that the anti-plunging traction wire 26 applies a strong traction force to the anti-plunging pulley 22.

Then, the traction force is also applied to the flow hole 10 to which the hinge shaft ( ) of the plunge prevention pulley 22 is coupled. If the magnitude of the traction force is greater than the elastic force of the positioning spring 12, the flow hole ( 10) moves in the direction of the first reduction pulley 18 and the second reduction pulley 20 along the guide hole (), and the hinge shaft 10a is coupled to the flow hole 10. The pulley 22 also moves in the direction of the first reduction pulley 18 and the second reduction pulley 20, and eventually the plunge prevention pulley 22 moves between the first reduction pulley 18 and the second reduction pulley 20. It is sandwiched between the 2 reduction pulleys (20).

Then, the first reduction pulley 18, the plunge prevention pulley 22, and the second reduction pulley 20 hold the plunge prevention traction wire 26 from being transported, thereby traction for the plunge prevention. The lower truss 34 coupled to the lower end of the wire 26 also no longer descends.

Reference numeral 6 is a support coupled to the support plate 4, and 16 represents a guide pulley coupled to the end of the support 6 to guide the traction wire 26 for preventing plunge.

On the other hand, the device for preventing a sudden fall of an up-down door according to an embodiment of the present invention is not limited to the above-described embodiment, and various changes are possible within a range without departing from the technical gist thereof.

2: up-down door anti-drop device, 4: support plate,
8: guide ball, 10: flow ball,
12: positioning spring, 14: fixture,
18,20: 1st, 2nd speed reduction pulley, 22: plunge prevention pulley,
24: Hinge axis.

Claims (6)

An upper truss formed at the top of the door; A door frame coupled to a plurality of horizontally spaced apart at regular intervals from the ground and suspended from an elevating wire, and a lower truss coupled to a lower end of the door frame; A guide pulley coupled to the upper truss and the lower truss and guiding the up and down movement of the door frame, a wire drum for lifting the door frame by hanging it with a wire for lifting, and a geared motor shaft-coupled to the wire drum to generate driving force. for up-down door devices;
first reduction pulleys and second reduction pulleys installed on the top of the upper truss to be spaced apart from each other up and down, and having a traction wire for preventing plunge falling around the outer periphery;
Located between the first reduction pulley and the second reduction pulley, the anti-dropping traction wire is wound around the outer periphery and operated. Plunge prevention device for up-down doors that consists of a plunge-prevention pulley closely attached between the deceleration pulleys and prevents downward loosening of the plunge-prevention traction wire. According to claim 1,
When the up-down door device is in normal operation, the plunge prevention pulley is provided with a positioning spring for providing elastic force to be spaced apart from the first deceleration pulley and the second deceleration pulley by a predetermined distance. According to claim 1,
Coupling holes to which both hinge shafts of the first and second reduction pulleys are coupled are formed, and a support plate formed with guide holes to be movable left and right in a state in which the plunge prevention pulley is fastened is configured to be fixed to the upper truss Featured anti-fall device for up-down doors. According to claim 1,
Plunge prevention device of the up-down door, characterized in that a plurality of each formed on both ends of the up-down door device. According to claim 1,
The plunge-preventing traction wire has one end coupled to the lower truss regardless of the lifting wire, and a weight coupled to the other end, and the weight is guided by a weight guide. prevention device. According to claim 3,
A flow hole formed with a coupling ball that is recessed into the guide hole formed in the support plate, slides, is coupled to one end of the positioning spring, and is coupled to the hinge axis of the anti-plunging pulley;
Plunging prevention device for up-down doors, characterized in that a fixture fixed at a position spaced apart from the guide hole by a predetermined length and coupled to the other end of the positioning spring is further configured.

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