KR19980033622A - Multistage telescopic device of gondola arm with multi-chain structure - Google Patents

Abstract

The present invention secures the structural stability of the arm by interlocking and stretching the arms at the same length with the main drive chain to prevent the accidental safety accident even when any one of the extension drive chains is broken. A multistage expansion and contraction device of a gondola arm having a multi-chain structure that can be used.

The present invention provides a gondola arm expansion apparatus having arms of first to Nth (where N is an integer greater than or equal to 3) stages coupled to each other, each of which is accommodated at a tip of an N-stage arm fixed to the second to gondola bodies. First to (N-1) front end sliding means for setting each arm in a slidable contact state and rear ends of the first to (N-1) end arms, respectively, for accommodating arms at each end. First to (N-1) rear end sliding means for slidably contacting each arm, and installed on the N-end arm and moving the (N-1) -end arm forward and backward by a distance set within the final end arm. A first to a first drive for moving the front and rear arms forward and backward by the same distance as the moving distance by the main driving means, in linkage with the forward and backward movement of the (N-1) end arm. (N-2) driven It characterized by consisting of a driving means.

Description

Multistage telescopic device of gondola arm with multi-chain structure

The present invention relates to a multi-stage expansion and contraction device of a gondola arm having a multi-chain structure, and in particular, by securing the structural stability of the arm by interlocking and stretching the arms of each end to the same length in conjunction with the main drive chain. The present invention relates to a multi-stage expansion device of a gondola arm having a multi-chain structure that can prevent accidental safety accidents by preventing the movement of the arm of the corresponding end and the other end even when one extension drive chain is broken.

As high-rise buildings were built, gondola equipment was needed to repair the exterior walls of the building, clean the windows, repair and move the buildings.

The gondola equipment is usually installed on the roof top to protrude the arm from the gondola to connect the wire rope between the pulley installed at the end of the arm and the wire drum of the gondola body and allow the operator to ride on the end of the wire rope. By connecting the cage by rotating the drum it is possible to work by moving the cage up and down.

Conventionally, the building was a simple rectangular shape, but as the building gradually had a complicated shape, there was a need for an extension device for an arm capable of adjusting the working distance between the cage outer wall and the building outer wall on which the operator boarded.

As a result, a sliding gondola with a single-stage long arm was developed. Recently, there are more work zones and passage areas that are not handled by single-stage arm sliding. Furthermore, when the building is completed, the gondola arm protrudes to the outside to damage the aesthetics of the building. To prevent this, the arm is made of two or more stages and the arm is reduced to the minimum when not used.

In addition, the multi-stage expansion device of the recently constructed gondola arm, for example, the multi-stage expansion device of the gondola arm disclosed in Korean Utility Model Registration No. 95-5068, allows the arm of each stage to be driven by a single drive chain when it is manufactured in three or more steps. Therefore, the distance of the end terminal arm is the same, but the first and second stages can freely flow without being fixed.

Therefore, in this single chain drive system, there is no fluid stability due to the presence of flowable arms, especially in the case of the dual type arm structure, even if the dual arms are extended at the same time, the arms on the side where the end arm is extended relatively long are stretched less. There is a problem that the load can be more concentrated than the arm on the other side, which causes the arm to bend or break.

In addition, the multi-stage expansion and contraction device of the single chain drive type may cause damage to the operator occupying the cage, because the expansion and contraction of the cage in an undesired direction occurs if any part of the drive chain is broken.

In addition, since a single chain is used, appropriate chains and ropes cannot be independently adopted to cope with the load applied to each end.

Accordingly, the present invention has been made in view of the problems of the prior art, and its object is to secure the structural stability of the arm by stretching the arm of each end to the same length by interlocking with the main drive chain, and at the same time driving one of the kidneys. The present invention provides a multistage expansion and contraction device for a gondola arm having a multi-chain structure that prevents accidental safety accidents by preventing the movement of the arms at the end and the other end even when the chain is broken.

Another object of the present invention is to independently adopt the appropriate chain and rope that can cope with the load applied to each end at each end to have the optimum tensile strength with the minimum weight, and to adjust the tension to give the appropriate tension at each end The present invention provides a multistage expansion and contraction device of a gondola arm having a multi-chain structure that can easily adjust the tension of each drive chain with a bolt.

Figure 1 is a side cross-sectional view showing a state in which the arm is stretched using a multi-stage stretching device having a multi-chain structure according to the present invention,

Figure 2 is a side cross-sectional view showing a state in which the arm is stretched using the multi-stage stretching device shown in FIG.

3 is a schematic cross-sectional view for explaining the principle of expansion and contraction of a multistage expansion and contraction apparatus having a multi-chain structure according to the present invention;

4 is a cross-sectional view taken along the line IV-IV of FIG. 2.

(Code description for main part of drawing)

10,20 ,,, 50; Arms 10a, 20a, 30a, 40a; Side Guide Bracket

13,23,33,43; Upper support rollers 14,24,34,44; Lower support roller

15,25,35; Kidney drives 15a, 16a, 25a, 26a, 35a, 36a; Tension adjusting bolt

16,26,36; Shrinkage Drive 45; Main drive chain

17,27-29,37-39,47a, 47b, 48,49; Chain sprocket

22a, 22b, 32a, 32b, 42a, 42b, 52a, 52b; Side guide roller

61,62,63; Pulley 70; Wire rope

80; Cage swivel device

In order to achieve the above object, the present invention is a gondola arm expansion device having an arm of the first to N (where N is an integer greater than or equal to 3) stages are sequentially fixed to the second to gondola body First to (N-1) front end sliding means for slidably setting each of the arms respectively accommodated at the leading end of the N-end arm, and the rear end of the first to (N-1) end arms. First to (N-1) rear-end sliding means, each of which is provided at each of the ends and slidably contacts with each of the arms accommodating the arms of each end, and the (N-1) Main drive means for moving the arm forward and backward by the distance set within the final arm, and the distance of movement of the front end arm by the main drive means in linkage with the forward and backward movement of the (N-1) end arm. Same as It provides the first to the (N-2) multi-stage stretching apparatus of the gondola arm having a multi-linked structure, characterized in that constituted by a driven drive means for moving back and forth by.

In the telescopic body, the main drive means includes a pair of chain sprockets provided at a constant distance from the lower end surface of the N-stage arm, and the main ends of which are fixed to the rear ends of the (N-1) end arms through the pair of chain sprockets, respectively. The first to the (N-2) driven driving means is composed of a drive chain, the first to (N-2) extending drive for extending and driving the tip arm sequentially from the (N-2) stage to the first stage Means and first to (N-2) th contraction driving means for sequentially contracting the tip arm from the (N-2) -stage to the first-stage. Therefore, the extension and contraction of the (N-1) multistage arms are made in accordance with the rotational driving direction of the main drive chain.

In addition, the first to the (N-2) -extension driving means each of the first to (N-2) extending chain sprocket rotatably installed on the lower end surface of the front end of the arm (the corresponding end + 1), Each of the first to the second N-2 fixed to the rear end of the corresponding arm and fixed to the rear end of the corresponding arm via the extension chain sprocket of the corresponding end +1 end, respectively. It is preferably composed of an extension drive chain.

The first to (N-2) contraction driving means each pair of (1 to + N) contraction of the pair of first to (N-2) that is rotatably installed at the lower end of the rear end and the rear end of the end arm And each end is fixed to the rear end of the corresponding arm and extends parallel therefrom (to the end + 1) through a pair of shrinking chain sprockets (to the end + 2) to the lower end of the end arm. It is preferable that it is composed of the first to the (N-2) shrinkage driving chain fixed.

On the other hand, the first to (N-1) front end sliding means is the first to (N-1) for slidably supporting the outer lower surface of the first to (N-1) stage arm on the inner lower end A pair of first to N-th pairs provided on the lower support rollers and both side surfaces of the front end portions of the second to Nth end arms to slidably guide the first to Nth end arms, respectively. 1) It is preferably composed of a side guide roller.

In addition, the first to (N-1) rear end sliding means are installed at the upper end of the rear end of the first to the (N-1) end arm, respectively, the inner upper surface of the second to N-th end arm, respectively. The first to (N-1) upper support rollers for minimizing the friction force when sliding in contact with and the outer end of the rear end of the first to (N-1) end arms Of the first to (N-1) th lower support rollers for minimizing the frictional force when sliding in contact with the inner lower surface of the tonth to the Nth end arms, and the first to the (N-1) th end arms. Each of the rear end outer side walls may be provided with a pair of first through (N-1) side guide brackets for reducing frictional force during sliding movement of the arm.

Furthermore, the first to second (N-2) extension drive chains fixed to the rear end of the (corresponding end + 2) end arm each have first to second (N-2) tension adjusting means for adjusting the tension of the chain. And the first to (N-2) contraction driving chains fixed to the lower end surface of the tip arm (the corresponding end + 2) end of the first to the (N-2) tension adjustment for adjusting the tension of the chain It is preferred to further comprise means.

In the present invention, the power transmission of the main drive means and the first to (N-2) driven drive means may be made by a chain or a wire rope.

As described above, in the present invention, the arms of each end can be stretched and contracted to the same length by interlocking with the main drive chain, thereby eliminating structural instability caused by unbalanced driving of the dual arms. With a contraction drive chain and even if one of the kidney drive chain is broken can prevent the accidental safety accident by preventing the movement of the arm of the end and the other end.

Furthermore, in the present invention, since the expansion and contraction are made by a pair of independent chains at each end rather than a single chain driving method, appropriate chains and ropes that can cope with the load applied to each end can be independently adopted.

In addition, each end is provided with a tension adjusting bolt for imparting an appropriate tension to each end can be adjusted appropriately to facilitate the use.

(Example)

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

1 is a side cross-sectional view showing a state in which an arm is stretched using a multistage expansion and contraction apparatus having a multi-chain structure according to the present invention, and FIG. 2 is a view showing an extended state of the arm using the multistage expansion and contraction apparatus shown in FIG. 3 is a schematic cross-sectional view illustrating a stretching drive principle of a multistage expansion and contraction apparatus having a multi-chain structure according to the present invention, and FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 2.

First, the structure of a multistage expansion and contraction apparatus having a multi-chain structure according to the present invention will be described with reference to FIGS. 1 and 2.

The multistage expansion and contraction apparatus of the present invention is suitable for having a multistage arm of at least three or more stages. It has a combined structure.

That is, the first stage arm 10 is on the inner wall of the second stage arm 20, the second stage arm 20 is on the inner wall of the third stage arm 30, and the third stage arm 30 is the fourth wall. To the inner wall of the stage arm 40, the fourth stage arm 40 is successively coupled to the inner wall of the fifth stage arm 50. As shown in FIG.

In this case, the outer bottom surface of the first to fourth end arms 10, 20, 30, and 40 is slidably supported at the inner bottom of the distal end of the second to fifth end arms 20, 30, 40, and 50. The lower support rollers 21, 31, 41, and 51 are provided, respectively, and the first to fourth end arms on both inner side surfaces of the tip end portions of the second to fifth end arms 20, 30, 40, and 50 ( A pair of side guide rollers 22a, 22b, 32a, 32b, 42a, 42b, 52a, and 52b are provided for slidably guiding the 10, 20, 30 and 40, respectively.

Furthermore, the upper and lower ends of the rear end portions of the first to fourth stage arms 10, 20, 30, and 40 are respectively formed on the upper and lower inner surfaces of the second to fifth stage arms 20, 30, 40, and 50, respectively. Upper support rollers 13, 23, 33, 43 and lower support rollers 14, 24, 34, 44 are provided respectively for minimizing friction when sliding in contact with the surface (see Fig. 4). In addition, a pair of side guide brackets 10a, 20a, 30a, and 40a are provided on both side walls of the rear end portions of the first to fourth end arms 10, 20, 30, and 40 for smooth ring driving.

Meanwhile, the multistage expansion and contraction apparatus for stretching the first to third arms 10, 20, and 30 has three extension driving chains 15 for extending the first to third arms 10, 20, and 30, respectively. 25, 35 and three contraction drive chains 16, 26, 36 for contracting the first to third arms 10, 20, 30, respectively, and are realized by the fourth stage arm 40. The expansion and contraction drive is made by the main drive chain 45.

For example, the fourth stage arm 40 is connected to the rear end of the fourth stage arm 40 through a pair of chain sprockets 47a and 47b provided at a predetermined distance from the bottom surface of the fifth stage arm 50. Stretching and contracting are made in accordance with the rotational driving direction of the main drive chain 45 fixed to each end.

On the other hand, one end of the extension drive chain 35 for driving the third end arm 30 is fixed to the rear end of the third end arm 30, and the chain is provided on the lower end surface of the fourth end arm 40. It is fixed to the rear end of the fifth end arm 50 via the sprocket 37 via a tension adjusting bolt 35a.

In addition, one end of the contraction driving chain 36 is fixed to the rear end of the third end arm 30 and extends in parallel therefrom for the contraction driving of the third end arm 30. The pair of chain sprockets 48 and 49 provided at the lower end and the rear end are respectively fixed to the lower end surface of the tip end of the fifth end arm 50 via a tension adjusting bolt 36a.

In the present invention, the elastic structures of the second and first stage arms 20 and 10 are provided in the same manner as the expansion and contraction of the third stage arm 30.

On the other hand, the drum of the gondola body (not shown) is a cage swivel device (80) through the pulleys (61, 62) and the pulley (60) provided at the tip of the first end arm (10) in a known manner. The wire rope 70 of the two or four lines is connected to the cage on which the operator boards through the wire rope 70 by winding or unwinding according to the rotation of the drum to raise and lower the cage.

The operation of the multi-stage expansion and contraction device having a multi-chain structure of the present invention configured as described above will be described in detail below with reference to FIG. 3.

First, when extending the multistage arm (10, 20, 30, 40) in the contracted state as shown in Figure 1 by rotating the chain sprockets 47a, 47b counterclockwise by the power source provided in the fifth end The main drive chain 45 is rotated counterclockwise.

As a result, the fourth stage arm 40 is advanced forward by the rotational distance of the drive chain 45, so that the chain sprocket 37 of the fourth stage arm 40 is also advanced forward at the same time. In this case, one end of the kidney drive chain 35 is connected to the fifth end arm 50 having a fixed position, and the other end of the kidney drive chain 35 is connected to the rear end of the third end arm 30 which is movable. As a result, the third stage arm 30 is advanced forward by the same distance as the fourth stage arm 40.

At this time, since all the extension drive chains 15, 25 and 35 have the same length, the second and first end arms 20 and 10 also move forward in the same manner as the extension drive of the third arm 30 as described above. Done.

At this time, when the rotation of the main drive chain 45 is stopped, the forward movement of the fourth stage arm 40 is also stopped, and thus the forward movement of the first to third stage arms 10, 20, 30 is also stopped and stopped at the same time. Will remain intact.

When the multistage arms 10, 20, 30, and 40 are contracted in the state where the arms are extended as shown in FIG. 2, the chain sprockets 47a and 47b are rotated clockwise by the power source provided in the fifth stage. The main drive chain 45 also rotates clockwise.

As a result, the fourth stage arm 40 moves backward by the rotational distance of the main drive chain 45, and thus the chain sprockets 48 and 49 of the fourth stage arm 40 also backward. In this case, one end of the contraction drive chain 36 is connected to the fifth end arm 50 having a fixed position, and the other end of the contraction drive chain 36 is connected to the rear end of the movable third end arm 30. As a result, the third stage arm 30 moves forward by the same distance as the fourth stage arm 40.

At this time, since all the contraction drive chains 16, 26, 36 have the same length, the second and first end arms 20, 10 are also retracted in the same manner as the contraction drive of the third end arm 30. Done.

At this time, when the rotation of the main drive chain 45 is stopped, the reverse of the fourth stage arm 40 is also stopped, so that the reverse of the first to third stage arms 10, 20, 30 is also stopped and stopped at the same time. Will remain intact.

At the time of expansion and contraction of the multi-stage arm, each arm is provided with lower support rollers 21, 31, 41, 51 and side guide rollers 22a, 22b, 32a, 32b, 42a, 42b, 52a and 52b at the front end. Less frictional force with the other end arm received inside, and the rear end of each end arm has upper support rollers (13, 23, 33, 43), lower support rollers (14, 24, 34, 44) and side surfaces. Guide brackets (10a, 20a, 30a, 40a) is provided, so that the expansion and contraction can be made in the sliding manner with the other end of the arm to accommodate each arm.

Therefore, in the present invention, the first to fourth arm (10, 20, 30, 40) can be stretched to the same length in conjunction with the main drive chain 45 of the fifth stage to configure the gondola in a dual arm method It is possible to eliminate structural instability due to unbalanced driving of either arm.

Furthermore, in the present invention, the retraction drive chains 15, 25, 35 and the retraction drive chains 16, 26, 36 are provided at each end, so that even when any one of the renal drive chains is broken, the contraction of the arm is performed by the main drive chain 45. It is made by the contraction drive chain according to the driving of), and the extension and contraction drive chains of the front and rear ends are interconnected to prevent unwanted movement of the arms of the corresponding end and the other end, so that the cage on which the worker boards is mounted on the wall of the building. You can prevent accidental accidents.

In addition, as described above, the present invention is not a single chain drive method, but is a multi-chain drive method in which expansion and contraction are performed by a plurality of pairs of drive chains that are independent and interlock with each end, so that a chain of appropriate strength that can cope with the load applied to the arms of each end is provided. Can be adopted independently.

In addition, a plurality of tension adjusting bolts 15a, 16a, 25a, 26a, 35a, and 36a for imparting proper tension to each end are provided for each end, so that the tension can be suitably adjusted.

As described above, in the present invention, the arms of each end can be stretched and contracted to the same length by interlocking with the main drive chain, thereby eliminating structural instability caused by unbalanced driving of the dual arms. With a contraction drive chain and even if one of the kidney drive chain is broken can prevent the accidental safety accident by preventing the movement of the arm of the end and the other end.

Furthermore, in the present invention, since the expansion and contraction is made by a pair of independent chains at each end rather than a single chain driving method, an appropriate chain that can cope with the load applied to each end can be independently adopted.

In addition, each end is provided with a tension adjusting bolt for imparting a proper tension to each end can easily adjust the tension of each drive chain to facilitate maintenance.

In the above, the present invention has been illustrated and described with reference to specific preferred embodiments, but the present invention is not limited to the above-described embodiments and is not limited to the spirit of the present invention. Various changes and modifications can be made by those who have

Claims (7)

In the gondola arm expansion device having an arm of the first to Nth (where N is an integer of 3 or more) to be sequentially coupled, First to (N-1) front end sliding means for slidingly setting the respective arms accommodated in the front end portions of the N-stage arms fixed to the second to gondola bodies in a slidable contact state; First to (N-1) rear end sliding means which are respectively provided at the rear end portions of the first to (N-1) end arms and slidably set in contact with the respective arms accommodating the arms of each end; , Main driving means installed on the N-stage arm to move the (N-1) stage arm back and forth by a distance set within the final stage arm; First to (N-2) driven drives for moving the front and rear arms back and forth by the same distance as the movement distance by the main driving means, in linkage with the forward and backward movement of the (N-1) stage arm; A multistage expansion and contraction apparatus of a gondola arm having a multi interlocking structure, characterized in that it is constituted by means. According to claim 1, The main drive means is a pair of chain sprockets provided at a predetermined distance to the lower end surface of the N-stage arm, It consists of a main drive chain fixed to the rear end of each of the (N-1) end arm through the pair of chain sprocket, The first to (N-2) driven driving means is a first to (N-2) extending drive means for driving the leading end arm in sequence from (N-2) stage to the first stage; (N-2) consisting of first to (N-2) contraction driving means for sequentially contracting the tip arm from the end to the first stage, according to the rotational driving direction of the main drive chain (N-1) A multistage telescopic device of a gondola arm having a multi-interlocking structure, characterized in that the elongation and contraction of a dog multistage arm is achieved. According to claim 2, wherein the first to the (N-2) extending driving means is first to (N-2) extending rotatably installed on the lower end of the front end of the arm (for the end + 1) for each end respectively; Dragon chain sprockets, Each of the first to the second N-2 fixed to the rear end of the corresponding arm and fixed to the rear end of the corresponding arm via the extension chain sprocket of the corresponding end +1 end, respectively. It consists of a kidney drive chain, The first to (N-2) contraction driving means each pair of (1 to + N) contraction of the pair of first to (N-2) that is rotatably installed at the lower end of the rear end and the rear end of the end arm Dragon chain sprockets, Each of the first to the first end is fixed to the rear end of the corresponding arm and extends in parallel therefrom (the corresponding end + 1) through a pair of contracting chain sprocket (the end + 2) fixed to the lower end surface of the end arm A multistage expansion and contraction apparatus of a gondola arm having a multi-interlock structure, comprising: (N-2) a contraction driving chain. The method of claim 1, wherein the first to (N-1) front end sliding means is the first to the first to the first lower to the outer lower surface of the first to (N-1) stage arm slidably supported (N-1) the lower support roller, A pair of first to first (N-1) side guide rollers installed on both inner side surfaces of the front end portions of the second to Nth end arms to slidably guide the first to Nth end arms, respectively. Multi-stage expansion device of the gondola arm having a multi-interlock structure, characterized in that consisting of. According to claim 1, wherein the first to (N-1) the rear end sliding means is provided on the upper end of the rear end of the first to the (N-1) end arm, respectively, the second to the N-th end First to (N-1) upper support rollers for minimizing friction when slidingly in contact with the inner upper surface of the arm, The first to the first to the (N-1) to the lower end of the rear end of the end of the arm and the first to the first to minimize the friction force when sliding in contact with the inner lower surface of the second to Nth end arm, respectively (N-1) the lower support roller, It is provided on both side walls of the rear end outer surface of the first to the (N-1) end arm and is composed of a pair of first to (N-1) side guide bracket for reducing the frictional force during the sliding movement of the arm Gondola arm multi-stage stretching device having a multi-interlocking structure, characterized in that. 4. The tension adjustment method according to claim 3, wherein the tension adjustment is performed to adjust tensions of the first to second N-th extension drive chains fixed to the rear end of the corresponding arm. Sudan, Further comprising a first to (N-2) tension adjusting means for adjusting the tension of the first to (N-2) contraction drive chain fixed to the lower end surface of the (applicable end + 2) end arm Gondola arm multi-stage stretching device having a multi-interlocking structure, characterized in that. 2. The multistage expansion and contraction device of a gondola arm according to claim 1, wherein the power transmission of the main drive means and the first to second driven drives is performed by chains or wire ropes.