KR102211226B1 - Safety block with lock prevention function - Google Patents

Abstract

An objective of the present invention is to provide a safety block with a lock prevention function which can attenuate an impact applied to a main body of a safety block by a hook at the time when rope winding is completed. According to the present invention, the safety block with a lock prevention function comprises: a fixed rail (10) having a fastening means (12) to be mounted on a withdrawal hole (3a) of a main body (3), and a first guide hole (14) formed therein and guiding movement of a rope (L); a movable cylinder (20) extended and moved along the fixed rail (10), and provided with a second guide hole (24) provided therein and guiding movement of the rope (L); a buffer member (30) installed between the fixed rail (10) and the movable cylinder (20); and a stopper (40) installed on an end of the rope (L), and provided to be stopped on the movable cylinder (20) while winding the rope (L) to limit an insertion length of the rope (L). The buffer member (30) is provided to form a low-speed section (50) in which the rope (L) winding speed is reduced by an extension action from the time when the stopper (40) is stopped on the movable cylinder (20). If the safety block with a lock prevention function is used, the structure is improved to form the low-speed section at the time when rope winding is completed to prevent malfunction in which the safety block is switched to a lock state by a rope winding impact.

Description

Safety block with lock prevention function}

The present invention relates to a safety block having a lock preventing function, and to explain this in more detail, a safety block having a lock preventing function capable of attenuating the impact applied to the body of the safety block by the hook at the time of completion of the rope winding.

In general, when it is necessary to work outdoors or on railings in high altitudes where there is a risk of a fall, such as building a high-rise building or a large ship, safety blocks are mainly used to prevent a fall accident.

For example, a safety block is a safety device to prevent safety accidents that may occur when an operator falls during work in various industrial sites.It connects the rope of the safety block to the safety belt and is automatically locked in a situation where the worker falls down. In some cases, it is converted into a state that prevents loosening of the rope. However, there have been cases where the safety block malfunctions, leading to a large accident due to the failure of braking or not being able to brake quickly when the worker falls.

Accordingly, in the conventionally disclosed utility model registration No. 20-0482459, the front cover having a ratchet groove formed therein, the rear cover coupled at one side of the front cover, and the webbing are wound by being inserted between the front cover and the rear cover. It consists of a bobbin on which a spring is installed for sexual winding, a toothed wheel with teeth that form a braking means between the front cover and the bobbin, and a coupling shaft that is installed on the front cover and rear cover to guide rotation of the bobbin and the toothed wheel. In the constructed safety block, a technology including a metal insert for supporting the webbing while being rotated by being inserted into the coupling shaft, and a plastic bobbin integrally formed with the metal insert and wound up the webbing has been proposed. .

In addition, in the other prior art Patent Registration No. 10-1176908, the webbing reel is built in the inside of the front cover and the rear cover, the webbing is wound, a spring seating portion is provided on one side, and a guide plate is installed on the other side; A toothed wheel consisting of a disk shape, seated in the seating groove of the front cover, coupled to rotate around the coupling shaft, fixed to one side of the webbing reel, rotated with it, and having a plurality of toothed grooves formed around it; When the webbing reel and the cogwheel are rapidly rotated due to a worker's fall and the cogwheel of the cogwheel, the locking end of the cogwheel is removed from the cogwheel and is caught and supported by the ratchet groove of the front cover; An auxiliary braking unit installed in the front cover and the rear cover of the lower side of the gearwheel, guides the webbing to be drawn out of the front cover and the rear cover, and decreases the fall speed while increasing the frictional force with the webbing when the operator falls; A technology including an emergency lift unit provided to lift a crashed worker by rotating a gear wheel on one side of the safety block has been previously registered.

However, in the prior art, due to the structural characteristic of the webbing being elastically wound by the mainspring after the webbing is unwound, the teeth are momentarily expanded due to the stop impact with the safety block main body at the time when the webbing is all wound, and are engaged with the ratchet groove to become locked. As it was converted, there was a problem in which malfunctions such as poor webbing loosening occurred frequently.

KR 20-0482459 Y1 (2017.01.19.) KR 10-1176908 B1 (2012.08.20.)

In the present invention, in order to solve all the problems of the prior art, a new technology was created, and a structure was improved to form a low-speed section at the time of completion of the rope winding by installing a reduction module in the opening through which the rope is drawn in or out. It is a problem of the present invention to provide a safety block having a lock prevention function capable of attenuating the impact.

Along with this, although not described separately, other objects within the range that can be inferred in consideration of the specific content and claims for carrying out the following invention are also included in the entire subject of the present invention.

As a specific means for solving the problem of the above invention, in the present invention, a safety block having a lock prevention function is constructed, but the front cover 1 having the ratchet groove 1a and the front cover 1 are combined to face The rear cover (2) is provided, and the rope (L) is inserted between the main body (3) in which the withdrawal hole (3a) is formed in the lower part, and the front cover (1) and the rear cover (2). ) Is wound and a spring (4) for elastically winding the rope (L) is installed at the rear end of the bobbin (5), and the teeth (6a) forming a braking means between the front cover (1) and the bobbin (5) It has a lock prevention function consisting of a cogwheel (6) fastened, and a coupling shaft (7) installed on the front cover (1) and rear cover (2) to guide the rotation of the bobbin (5) and the cogwheel (6). In the safety block to have,

The main body 3 is provided with a deceleration module 100 that is installed at the lead-out hole 3a or the end of the rope L and reduces the speed of the rope L at the time of completion of winding the rope L, and the reduction module 100) is provided with a fastening means 12 so as to be mounted on the main body 3 withdrawal hole 3a or the end of the rope L, and a first guide hole 14 through which the rope L passes is formed. Fixed rail 10; A flow cylinder (20) having a second guide hole (24) that extends and contracts along the fixed rail (10) and guides the movement of the rope (L) therein; And a buffer member 30 installed between the fixed rail 10 and the flow cylinder 20 and provided to reduce the movement of the flow cylinder 20 in the contraction direction. Including, and corresponding to the flow cylinder 20 It is installed at the end of the main body (3) withdrawal hole (3a) or rope (L), and is grounded with the flow cylinder 20 while the rope (L) is being wound, so that the stopper 40 is It is provided, and the buffer member 30 is provided to form a low-speed section 50 for decelerating the winding speed of the rope L by contraction from the point when the flow cylinder 20 and the stopper 40 are grounded. To do.

At this time, a key rail 16 is formed on the outer circumferential surface or inside of the fixed rail 10, and a key 26 protrudes on the inner circumferential surface or inside of the flow cylinder 20 so as to be engaged with the key rail 16, and the By combining the key rail (16) and the key (26), the fixed rail (10) and the flow cylinder (20) are bound together, and the key (26) is moved along the key rail (16). It characterized in that it is provided to allow the expansion and contraction movement.

In addition, the flow cylinder 20 is formed with a center guide groove 28 of an upper narrow light structure whose diameter decreases toward the center of the second guide hole 24 at an end corresponding to the stopper 40, and the stopper 40 ) It is characterized in that the center guiding protrusion 48 is formed at the end of which the diameter decreases toward the center guiding groove 28 side.

In addition, when the fixed rail 10 is installed in the main body 3 withdrawal hole 3a, the fastening means 12 is engaged with the inner and outer circumferential surfaces of the main body 3 while being inserted into the withdrawal hole 3a. The bolt portion 12b and the nut portion 12c are formed as a pair of locking protrusions 12a to be constrained or are inserted into the withdrawal holes 3a and are bound to the inner and outer circumferential surfaces of the main body 3 by screwing It is characterized in that it is formed of a key portion (12d) inserted into the withdrawal hole (3a) and a mounting plate (12e) fastened to the outer peripheral surface bolt (B) of the main body (3).

According to the above configuration and operation, the present invention is improved in the structure of the rope to form a low-speed section at the time of completion of winding by the deceleration module, and it is possible to prevent a malfunction in which the teeth are instantaneously expanded due to the rope winding impact and converted into a locked state. have.

In addition, there is an effect that the reduction module is simply applied to various safety blocks in use and provides versatility that can be used.

1 is a block diagram showing the overall safety block having a lock prevention function according to an embodiment of the present invention.
Figure 2 is a longitudinal cross-sectional view showing a fixed rail and a flow cylinder coupling structure of the safety block having a lock prevention function according to an embodiment of the present invention.
3 is a block diagram showing a low-speed section of a safety block having a lock prevention function according to an embodiment of the present invention.
4 is a block diagram showing a center guiding groove and a center guiding protrusion of a safety block having a lock preventing function according to an embodiment of the present invention.
Figure 5 is a block diagram showing the fastening means of the safety block having a locking function according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the present invention, when it is determined that the subject matter of the present invention may be unnecessarily obscured as matters that are obvious to those skilled in the art with respect to known functions related to the present invention, a detailed description thereof will be omitted.

1 is a front view showing a preferred embodiment of a safety block having a lock prevention function provided by the present invention, the safety block of the present invention is improved structure to form a low-speed section at the time of completion of winding by the reduction module, Fixed rail (10) to provide versatility that can be easily applied to various safety blocks in use while the reduction module is easily applied to various safety blocks in use, as well as preventing malfunctions in which the teeth are momentarily expanded and converted to a locked state due to the rope winding impact. It is characterized in that the flow cylinder 20, the buffer member 30, and the main configuration of the stopper 40 is further included.

The safety block according to the present invention is provided with a front cover (1) having a ratchet groove (1a) formed thereon, and a rear cover (2) that is coupled to face the front cover (1), and a rope (L) is withdrawn from the lower portion thereof. It is inserted between the main body 3 in which the ball 3a is formed and the front cover 1 and the rear cover 2, and the rope L is wound, and a spring for elastically winding the rope L at the rear end ( 4) The bobbin (5) to be installed, the toothed wheel (6) to which the teeth (6a) forming the braking means between the front cover (1) and the bobbin (5) are fastened, the front cover (1) and the rear cover It is installed on the shaft (2) and consists of a coupling shaft (7) that guides the rotation of the bobbin (5) and the toothed wheel (6).

Here, the teeth 6a are set to rotate and expand in an outward direction by a centrifugal force due to the speed of loosening the rope L. That is, when the rope L is released at high speed when the operator falls, the teeth 6a 6a) is extended and caught in the ratchet groove (1a) to stop the loosening of the rope (L), and when the operator moves the position during the high altitude operation and the rope (L) is released at a low speed, the teeth (6a) fall into the ratchet groove (1a). It is provided to allow loosening of the rope (L) in a bound state.

The reduction module 100 according to the present invention is installed at the main body 3 withdrawal hole 3a or at the end of the rope L, and is provided to reduce the speed of the rope L at the time of completion of the rope L. 1 (a) shows a state in which the reduction module 100 is installed in the main body 3 withdrawal hole 3a, and FIG. 1 (b) illustrates a state in which the reduction module 100 is installed at the end of the rope (L). do.

Specifically, the deceleration module 100 includes a fixed rail 10, a flow cylinder 20, and a buffer member 30. Here, the fixed rail 10 is provided with a fastening means 12 so as to be mounted on the lead-out hole 3a of the main body 3 or the end of the rope L, and a first guide hole through which the rope L passes. (14) is formed. The fixed rail 10 is formed of a square tube or a circular tube, and one end is mounted on the main body 3 by means of a fastening means 12 as shown in FIG. 1 (a), or a rope as shown in FIG. 1 (b). (L) It is provided to be fixed to the end. In addition, a flow cylinder 20, which will be described later, is coupled to the other end of the fixed rail 10 to support it so that it can be stretched and moved.

As a temporary example, when the fixed rail 10 is installed in the main body 3 withdrawal hole 3a, the fastening means 12 is inserted into the withdrawal hole 3a as shown in FIG. 5(a). The body 3 is formed of a pair of locking projections 12a that are engaged with the outer circumferential surface of the body 3 or is inserted into the withdrawal hole 3a as shown in FIG. 5 (b) and is inserted into the body 3 by screwing, The bolt part 12b and the nut part 12c are formed to be bound to the outer circumferential surface, or the key part 12d inserted into the withdrawal hole 3a as shown in FIG. 5 (c) and the main body 3 outer circumferential bolt (B) fastened It is formed of a mounting plate (12e).

According to various embodiments of the fastening means 12 as described above, the fixed rail 10 can be easily and simply applied to the existing safety block, and thus the versatility is high.

The flow cylinder 20 according to the present invention is telescopically moved along the fixed rail 10, and a second guide hole 24 for guiding the movement of the rope L is provided therein. The flow cylinder 20 is formed of a hollow tube body with an empty inside so that the fixed rail 10 is inserted, and a second guide hole 24 is formed in a straight line with the first guide hole 14 at the bottom. .

In the drawings of the present invention, a state in which the fixed rail 10 is inserted into the flow cylinder 20 is shown, but the present invention is not limited thereto, and the flow cylinder 20 is inserted and installed in the fixed rail 10 so as to be stretched and moved. The configuration is also possible.

2 is a longitudinal cross-sectional view showing a fixed rail and a flow cylinder coupling structure of a safety block having a lock preventing function according to an embodiment of the present invention. A key rail 16 is formed on the outer circumferential surface or inside of the fixed rail 10, and a key 26 protrudes from the inner circumferential surface or inside of the flow cylinder 20 so as to be engaged with the key rail 16. Figure 2 (a) shows a state in which the key rail 16 is formed inside the fixed rail 10, and the key 26 protrudes inside the flow cylinder 20 and is bound by the end hook of the key 26. , Figure 2 (b) shows a state in which the key rail 16 is formed on the outer circumferential surface of the fixed rail 10, and the key 26 protrudes from the inner circumferential surface of the flow cylinder 20 and is bound by the end hook of the key 26. .

In this way, the fixed rail 10 and the flow cylinder 20 are bound together by the key rail 16 and the key 26, and the key 26 is moved along the key rail 16, and the flow cylinder 20 ) Is allowed to move, but the flow cylinder 20 constitutes an integrated assembly that does not deviate from the fixed rail 10.

The buffer member 30 according to the present invention is installed between the fixed rail 10 and the flow cylinder 20, and is provided to reduce the movement of the flow cylinder 20 in the contraction direction. Here, the buffer member 30 is formed of any one of a spring, an elastic body, and a shock absorber.

As an embodiment, FIG. 2 shows a state in which the shock absorber 30 in the form of a shock absorber is applied, where the shock absorber is an integrated shock absorber, and when the shock absorber 30 in the form of a shock absorber is applied , The buffer member 30 is configured to be uniformly disposed around the first guide hole 14 so that the buffering force is uniformly distributed toward the flow cylinder 20.

In addition, the buffer member 30 is provided to generate a moving force in a direction in which the flow cylinder 20 extends on the fixed rail 10, that is, a downward direction, and when the flow cylinder 20 moves in the contraction direction, the buffer member ( As 30) is compressed, the speed of the flow cylinder 20 is reduced when the flow cylinder 20 moves in the contraction direction.

The stopper 40 according to the present invention is installed at the end of the main body 3 withdrawal hole 3a or the rope L so as to correspond to the flow cylinder 20, and the flow cylinder 20 and the flow cylinder 20 while the rope L is wound. It is grounded and provided to limit the length of the rope L. That is, the stopper 40 is installed adjacent to the fall prevention hook (H) at the end of the rope (L) as shown in Fig. 1 (a), or installed in the main body 3 withdrawal hole (3a) as in Fig. 1 (b) do.

In the conventional safety block, the kinetic energy generated by the load of the hook (H) and the winding (winding) speed of the rope at the point when the rope (L) is wound by the mainspring (40) and the winding is completed is transferred to the body of the safety block ( It is transmitted to 3), and there is a problem in that a malfunction occurs in which the teeth 6a are instantaneously engaged with the ratchet groove 1a and converted into a locked state due to an impact.

However, the reduction module 100 of the present invention configured as described above overcomes the above problems by being configured to have a low-speed section 50 by the buffer member 30. When the rope (L) is finished winding, that is, from the point when the stopper 40 and the flow cylinder 20 are grounded as shown in FIG. 3 (a), the contraction action of the buffer member 30 starts, and FIG. 3 (b) As a low-speed section (50) that decelerates the winding speed of the rope (L) is formed, a malfunction occurs in which the bobbin (5) does not rotate due to the winding shock by attenuating the kinetic energy transmitted to the body and is temporarily switched to the locked state. The problem that becomes clear is cleared.

4 is a block diagram showing a center guiding groove 28 and a center guiding protrusion 48 of a safety block having a lock preventing function, and the flow cylinder 20 is a second guide hole at an end corresponding to the stopper 40 ( 24) A center guide groove (28) of an upper narrow light structure whose diameter decreases toward the center is formed, and a center guide protrusion (48) is formed at the end of the stopper (40), whose diameter decreases toward the center guide groove (28). do.

As such, even if the stopper 40 is caught in a position out of the center of the flow cylinder 20 as shown in FIG. 4 (a) due to the high-speed winding of the rope (L), the center guiding protrusion 48 as shown in FIG. 4 (b) The position is corrected around the flow cylinder 20 by riding (28). As a result, since the position is corrected so that the rope (L) winding (winding) force is aligned with the center of the flow cylinder 20, the flow cylinder 20 contraction and movement defects due to an unbalanced load are prevented, and a low-speed section by the buffer member 30 ( In 50), the speed reduction efficiency of the rope (L) winding speed is improved.

As described above, the most preferred embodiments of the present invention have been described in the detailed description of the present invention, but various modifications may be made within the scope of the technical scope of the present invention. Therefore, the scope of protection of the present invention is not limited to the above embodiments, but the scope of protection should be recognized from the techniques of the claims to be described later and equivalent technical means from these techniques.

1: front cover 1a: ratchet groove 2: rear cover
3: main body 3a: withdrawal hole
4: mainspring 5: bobbin 6: toothed wheel 6a: tooth 7: coupling shaft
10: fixed rail
12: fastening means
12a: locking jaw 12b: bolt portion 12c: nut portion 12d: key portion 12e: mounting plate
14: first guide hole 16: key rail
20: flow cylinder
24: second guide hole 26: key 28: center guide groove
30: buffer member 40: stopper 48: center guide protrusion
50: low speed section 100: deceleration module
B; Bolt H: Hook L: Rope

Claims (4)

A front cover (1) having a ratchet groove (1a) formed therein, and a rear cover (2) coupled to face the front cover (1) are provided, and a pull-out hole (3a) through which the rope (L) is drawn is formed. The bobbin is inserted between the main body 3 and the front cover 1 and the rear cover 2, so that the rope L is wound, and a spring 4 is installed at the rear end for elastically winding the rope L. 5), between the front cover (1) and the bobbin (5), the toothed wheel (6) to which the teeth (6a) forming the braking means are fastened, and the bobbin is installed on the front cover (1) and the rear cover (2). (5) and a coupling shaft (7) for guiding rotation of the toothed wheel (6),
A deceleration module 100 is provided that is installed at the main body 3 withdrawal hole 3a or at the end of the rope L, and reduces the speed of the rope L at the time of completion of the rope L,
The reduction module 100 is provided with a fastening means 12 so as to be mounted on the main body 3 withdrawal hole 3a or the end of the rope L, and a first guide hole 14 through which the rope L passes. ) A fixed rail 10 is formed;
A flow cylinder (20) having a second guide hole (24) that extends and contracts along the fixed rail (10) and guides the movement of the rope (L) therein; And
Including; is installed between the fixed rail 10 and the flow cylinder 20, a buffer member 30 provided to reduce the movement of the flow cylinder 20 in the contraction direction,
The buffer member 30 is a shock absorber provided so that the flow cylinder 20 moves in an elongated direction on the fixed rail 10, and a first guide hole to uniformly distribute the buffering force toward the flow cylinder 20 ( 14) is placed at an equal angle,
It is installed at the end of the main body 3 withdrawal hole 3a or the rope L so as to correspond to the flow cylinder 20, and is grounded with the flow cylinder 20 while the rope L is being wound, and the rope L inlet length A stopper 40 is provided to limit it,
The deceleration module 100 is provided to form a low-speed section 50 for decelerating the winding speed of the rope L by the contraction action of the buffer member 30 from the point when the flow cylinder 20 and the stopper 40 are grounded. Safety block having a lock prevention function, characterized in that the.
The method of claim 1,
A key rail 16 is formed on the outer circumferential surface or inside of the fixed rail 10, and a key 26 protrudes on the inner circumferential surface or inside of the flow cylinder 20 so as to be engaged with the key rail 16, and the key rail The fixed rail (10) and the flow cylinder (20) are bound together by the combination of the key (16) and the key (26), and the key (26) is moved along the key rail (16), and the flow cylinder (20) expands and contracts. A safety block having a lock prevention function, characterized in that provided to allow this.
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