KR20240161399A - Apparatus Preventing from Drooping of Chain for Conveyor - Google Patents

Abstract

The conveyor chain sagging prevention device of the present invention comprises a drive shaft (2) equipped with a drive sprocket (2a), a drive motor (3) that rotates the drive shaft (2), a driven shaft (4) equipped with a driven sprocket (4a), a link chain (5) that connects the drive sprocket (2a) and the driven sprocket (4a) to form an endless track and is rotated by the rotation of the drive shaft (2) by the drive motor (3), a belt (6) that is connected to the link chain (5) and forms an endless track and is rotated in conjunction with the rotation of the link chain (5) to transport a transported object, and a main body (7) on which the drive shaft (2) and the driven shaft (4) are rotatably installed, and is installed on a conveyor (10) that is equipped with a bending portion (1) having a predetermined angle to change the transport angle and transport the transported object, and supports the link chain (5) at the bending portion (1) so that the link chain (5) is rotated. Prevents sagging.

Description

{Apparatus Preventing from Drooping of Chain for Conveyor}

The present invention relates to a chain sag prevention device for a conveyor, which is driven by a chain and a sprocket and has a curved portion, maintains the tension of the chain to prevent chain sagging at the curved portion, and enables the degree of chain sag to be checked externally.

In general, a conveyor driven by a chain and sprockets consists of a chain that connects a driving sprocket and a driven sprocket in an endless track. When the driving sprocket is rotated by a driving motor, power is transmitted through the chain, causing the belt to rotate.

For these conveyors, it is important to control the tension of the chain. If the tension of the chain is not properly adjusted, the chain will come off the sprocket and the conveyor will stop or the chain will break, so the tension of the chain will be periodically increased.

As the chain becomes loose due to frequent use of the conveyor, there is a method of adjusting the tension of the chain by using the elasticity of a spring to move the position of the driven sprocket away from the direction of the driving sprocket.

This method of controlling tension of a conveyor chain using a spring is disclosed in Japanese Patent Application Laid-Open No. 2011-006252 (Title of the invention: Tension adding device for passenger conveyor).

To adjust the chain tension, there is also a method of adjusting the chain tension by withdrawing and retracting a piston using a cylinder when the position of the driven sprocket is moved forward toward the driving sprocket or backward away from the driving sprocket.

A method for controlling tension of a conveyor chain using such a cylinder has been disclosed in Korean Patent No. 10-0945119 (Title of the invention: Passenger conveyor).

In addition, when a conveyor is equipped with a curved section (bend section), it is inevitable that the chain at the curved section will sag. To prevent the chain from sagging, a support section with a streamlined curve is equipped to support the chain, thereby preventing the chain from sagging.

A method for supporting a chain in a bend to prevent sagging of the chain is disclosed in Korean Patent No. 10-1808169 (Title of the invention: Dumping feeder).

However, the support member that prevents the sagging of the chain is fixed and simply supports the chain, so it has the disadvantage of not being able to perform the function of adjusting the tension of the chain.

In addition, there is a disadvantage in that it is difficult to visually check the degree of sagging of the chain, so the tension of the chain must be checked through regular or occasional inspections.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a chain sag prevention device for a conveyor, which maintains the tension of a chain in a conveyor driven by a chain and a sprocket and has a curved portion, thereby preventing chain sagging at the curved portion, and allows the degree of chain sagging to be checked externally.

The conveyor chain sagging prevention device of the present invention for achieving the above purpose comprises a drive shaft (2) equipped with a drive sprocket (2a), a drive motor (3) for rotating the drive shaft (2), a driven shaft (4) equipped with a driven sprocket (4a), a link chain (5) that connects the drive sprocket (2a) and the driven sprocket (4a) to form an endless track and is rotated by the rotation of the drive shaft (2) by the drive motor (3), a belt (6) that is connected to the link chain (5) and forms an endless track and is rotated in conjunction with the rotation of the link chain (5) to transport the transported material, and a main body (7) on which the drive shaft (2) and the driven shaft (4) are rotatably installed, and is installed on a conveyor (10) that is equipped with a bend (1) having a predetermined angle to change the transport angle and transport the transported material, and supports the link chain (5) at the bend (1) to In a conveyor chain sagging prevention device for preventing sagging of a link chain (5), the device comprises: a body (20) that is fixed to the inside of the main body (7) where the bending portion (1) is located, has an opening (21) provided on one side located in the same direction as the longitudinal direction of the link chain, and has a hollow interior; a rotational shaft (30) that is rotatably installed inside the body (20) perpendicular to the longitudinal direction of the link chain (5); a torsion spring (40) that is provided inside the body (20) to surround the rotational shaft (30) on the outside of the rotational shaft (30); a spring fixing bracket (50) that is provided inside the body (20) and fixes one end of the torsion spring (40) to the body (20); A first link (60) having a rotation shaft coupling portion (61) provided at one end and coupled to the outside of the rotation shaft (30) to rotate in conjunction with the rotation shaft (30), an extension portion (62) that is formed to extend long from the rotation shaft coupling portion (61) to the outside of the body (20) through the opening (21), and a pressing portion (63) that is formed to protrude in an arc shape at the bottom of the extension portion (62) located at the outside of the body (20) and presses the upper portion of the link chain (5); It comprises a catch (70) which is provided to protrude perpendicularly to the longitudinal direction of the link chain (5) on one side of the extension (62) of the first link (60) and has one end fixed by the spring fixing bracket (50), and the other end of the torsion spring (40) is caught so that torsion force is applied to the torsion spring (40), thereby rotating the extension (62) of the first link (60) by the torsion force of the torsion spring (40), and the pressing portion (63) presses the link chain (5), thereby maintaining the tension of the link chain (5) in the bent portion (1) and preventing sagging of the link chain (5).

In addition, one end of the rotation shaft (30) is formed to be extended and installed outside the main body (7), and is fixed to one end of the rotation shaft (30) which is installed outside the main body (7) and has one end extended, and is rotated by the elastic force of the torsion spring (40) when the first link (60) rotates, and is characterized by further including: a gauge lever (80); an indicator (90) provided on the other end of the gauge lever (80) and configured to indicate a rotation angle of the gauge lever (80); and a display (100) configured to indicate the rotation angle of the indicator (90) as a number or degree.

In addition, a gauge lever cover part (110) is further provided, which is fixedly installed on the outside of the main body (7) and is installed to accommodate one end of the extended rotation shaft (30) and the gauge lever (80), and the gauge lever cover part (110) is characterized in that an arc-shaped groove (120) is formed on the gauge lever cover part (110) so that the indication part (90) provided on the gauge lever (80) can be confirmed, and has a radius corresponding to the distance at which the indication part (90) is located from one end of the gauge lever (80) fixed to one end of the rotation shaft (30), and the indication part (100) is displayed on the gauge lever cover part (110) in the arc-shaped groove (120) or around the arc-shaped groove (120).

The conveyor chain sag prevention device of the present invention, having the above configuration, has an advantage in that, unlike a conventional chain sag prevention device in which the support member for preventing sagging of the chain is fixed and simply supports the chain, the tension of the link chain (5) can be maintained at the bend (1) by the pressing member (63) pressing the link chain (5) by the torsion force of the torsion spring (40), thereby preventing sagging of the link chain (5).

In addition, the degree of sagging of the link chain can be visually checked from the outside of the main body (7) covering the component for transporting the material using the link chain, so there is an advantage in being able to determine the timing of inspection of the link chain of the conveyor.

Figure 1 is a side view showing a conveyor on which a chain sagging prevention device for a conveyor of the present invention is installed.
Figure 2 is a longitudinal cross-sectional view showing the internal structure of a conveyor on which a chain sagging prevention device for a conveyor of the present invention is installed.
Figure 3 is a diagram showing the structure of a link chain.
Figure 4 is a side view showing the installation structure at a bend of a conveyor where the chain sag prevention device for a conveyor of the present invention is installed.
Figure 5 is a plan view showing the installation structure at the bend of the conveyor where the chain sagging prevention device for the conveyor of the present invention is installed.
Figures 6 and 7 are perspective views showing a chain sagging prevention device for a conveyor according to the present invention.
Fig. 8 is a cross-sectional view showing a chain sagging prevention device for a conveyor according to the present invention.
Fig. 9 is a side view showing a chain sagging prevention device for a conveyor according to the present invention.

Hereinafter, the conveyor chain sagging prevention device of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side view showing a conveyor on which a chain sag prevention device for a conveyor of the present invention is installed, FIG. 2 is a longitudinal cross-sectional view showing the internal structure of a conveyor on which a chain sag prevention device for a conveyor of the present invention is installed, FIG. 3 is a drawing showing the structure of a link chain, FIG. 4 is a side view showing an installation structure at a bend of a conveyor on which a chain sag prevention device for a conveyor of the present invention is installed, FIG. 5 is a plan view showing an installation structure at a bend of a conveyor on which a chain sag prevention device for a conveyor of the present invention is installed, FIGS. 6 and 7 are perspective views showing a chain sag prevention device for a conveyor of the present invention, FIG. 8 is a cross-sectional view showing a chain sag prevention device for a conveyor of the present invention, and FIG. 9 is a side view showing a chain sag prevention device for a conveyor of the present invention.

The conveyor chain sagging prevention device (200) of the present invention is installed on a conveyor (10) that has a bend (1) having a certain angle and changes the transport angle to transport the transported material.

The above conveyor (10) transports materials using a link chain, and as shown in FIGS. 1 and 2, is a known structure composed of a driving shaft (2), a driving motor (3), a driven shaft (4), a link chain (5), a belt (6), and a main body (7) on which the driving shaft (2) and the driven shaft (4) are rotatably installed.

A driving sprocket (2a) is provided at each end of the above driving shaft (2).

The above driving motor (3) serves to rotate the driving shaft (2).

A driven sprocket (4a) is provided at each end of the above driven shaft (4).

The above link chain (5) is connected to the driving sprocket (2a) and the driven sprocket (4a) respectively to form an endless track, and when the driving shaft (2) is rotated by the driving motor (3), the driving sprocket (2a) provided on the driving shaft (2) is rotated, and the driven sprocket (4a) also rotates, and is formed as a left and right pair.

The above link chain (5), as shown in Fig. 3, has a known structure in which inner plates (5a) and outer plates (5b) are installed alternately and a connecting pin (5c) connects them to each other, and a bearing or roller (5d) is rotatably fixed to the connecting pin (5c).

The above belt (6) is fixedly connected to a pair of link chains (5), forms an endless track like the link chain (5), and transports the transported material by rotating in conjunction with the rotation of the link chain (5).

The above main body (7) has the driving shaft (2) and the driven shaft (4) installed so as to be rotatable, and serves to cover the components for transporting the transported material using a link chain.

The conveyor chain sag prevention device (200) of the present invention, as shown in FIG. 4, supports a pair of link chains (5) in the bent portion (1) to prevent sagging of the link chains (5). The conveyor chain sag prevention device (200) is installed on the inner side of both sides of the main body (7), as shown in FIG. 5, to support a pair of link chains (5), thereby preventing sagging of the link chains (5). Preventing sagging of the link chains (5) means that the link chains (5) can maintain a certain tension.

The conveyor chain sagging prevention device according to the present invention comprises, as shown in FIGS. 6 to 9, a body (20); a rotating shaft (30); a torsion spring (40); a spring fixing bracket (50); a first link (60); and a catch (70).

The above-mentioned body (20) is fixed to the inside of the main body (7) where the above-mentioned bending part (1) is located, and has an opening (21) provided on one side located in the same direction as the longitudinal direction of the link chain, and is hollow inside.

The above rotational axis (30) is rotatably installed on the inside of the body (20) perpendicular to the longitudinal direction of the link chain (5), that is, on both sides of the body (20) perpendicular to the longitudinal direction of the link chain (5).

The above torsion spring (40) is provided inside the housing (20) so as to surround the rotation shaft (30) on the outside of the rotation shaft (30).

The spring fixing bracket (50) is provided inside the housing (20) and serves to fix one end of the torsion spring (40) to the housing (20) (see FIGS. 8 and 9). The other end of the torsion spring (40) is caught on a catch (70) to be described later (see FIGS. 6 and 7).

The above first link (60) is provided with a rotation shaft coupling portion (61), an extension portion (62), and a pressing portion (63), as shown in FIG. 6.

The above-mentioned rotary shaft coupling part (61) is provided at one end and is coupled to the outside of the rotary shaft (30) and rotates in conjunction with the rotary shaft (30).

The above extension part (62) is formed to extend long from the rotation shaft coupling part (61) to the outside of the body (20) through the opening (21).

The above pressing portion (63) is formed in an arc shape and protrudes from the lower portion of the extension portion (62) located on the outside of the body (20) and serves to press the upper portion of the link chain (5).

The pressing part (63) above presses the upper part of the link chain (5) by the torsion force of the torsion spring (40).

The above-mentioned hook (70) is provided so as to protrude perpendicularly to the longitudinal direction of the link chain (5) on one side of the extension (62) of the first link (60), and is configured to hook the other end of the torsion spring (40), of which one end is fixed by the spring fixing bracket (50), so that a torsion force is applied to the torsion spring (40). Accordingly, when the other end of the torsion spring (40) is caught by the catch (70) so that a torsion force is applied to the torsion spring (40), the torsion force of the torsion spring (40) causes the extension (62) of the first link (60) to rotate, thereby causing the pressing portion (63) to press the link chain (5), thereby maintaining the tension of the link chain (5) in the bend (1) and preventing sagging of the link chain (5).

The conveyor chain sag prevention device of the present invention, having the above configuration, has an advantage in that, unlike a conventional chain sag prevention device in which the support member for preventing sagging of the chain is fixed and simply supports the chain, the tension of the link chain (5) can be maintained at the bend (1) by the pressing member (63) pressing the link chain (5) by the torsion force of the torsion spring (40), thereby preventing sagging of the link chain (5).

In addition, it is preferable that the present invention enable the degree of sagging of the link chain to be visually confirmed from the outside of the main body (7) covering the component for transporting the transported material using the link chain.

To this end, the present invention provides that one end of the rotation shaft (30) is extended and installed outside the main body (7), and as shown in FIGS. 6, 8, and 9, a gauge lever (80), an indicator (90), and a display (100) are provided on the outside of the main body (7).

The above gauge lever (80) is installed on the outside of the main body (7), and is fixed to one end of the rotation shaft (30) from which one end is extended, and rotates in conjunction with the first link (60) when the first link (60) rotates due to the elastic force of the torsion spring (40). Since the gauge lever (80) rotates in conjunction with the first link (60), the degree of rotation of the first link (60) can be determined. When the other end of the torsion spring (40) is caught by the catch (70) so that a torsion force is applied to the torsion spring (40), the torsion force of the torsion spring (40) causes the extension (62) of the first link (60) to rotate, thereby causing the pressing portion (63) to press the link chain (5) to prevent sagging of the link chain (5). Since the gauge lever (80) rotates in conjunction with the first link (60) on the outside of the main body (7), the degree of rotation of the first link (60) can be detected. For example, when the link chain (5) breaks or the link chain (5) is separated from the driven sprocket (4a) or the driving sprocket (2a), the first link (60) pressing the link chain (5) rotates a very large amount due to the torsion force of the torsion spring (40). When the link chain (5) breaks or the link chain (5) is not separated from the driven sprocket (4a) or the driving sprocket (2a), if the tension of the link chain (5) becomes large, the rotation amount of the first link (60) pressing the link chain (5) becomes small, and if the tension of the link chain (5) becomes small, the rotation of the first link (60) pressing the link chain (5) becomes large, so that the rotation degree of the first link (60) can be determined according to the rotation angle of the gauge lever (80), and thus the degree of sagging of the link chain (5) can be determined.

The above-mentioned instruction part (90) is provided on the other end of the gauge lever (80) and serves to indicate the rotation angle of the gauge lever (80).

The above display unit (100) serves to display the rotation angle of the above indication unit (90) in a numerical value or degree.

In this way, the present invention enables the degree of sagging of the link chain to be visually checked from the outside of the main body (7) covering the component for transporting the material using the link chain, thereby enabling the timing of inspection of the link chain of the conveyor to be determined.

In addition, it is preferable that the present invention further includes a gauge lever cover part (110).

The above gauge lever cover part (110) is fixedly installed on the outside of the main body (7), as shown in FIG. 8, and is installed so that one end of the extended rotation shaft (30) and the gauge lever (80) are received.

At this time, it is preferable that the gauge lever cover part (110) is formed with an arc-shaped groove (120) having a radius corresponding to the distance at which the indicator (90) is located from one end of the gauge lever (80) fixed to one end of the rotation shaft (30) so that the indicator (90) provided on the gauge lever (80) can be confirmed (see FIGS. 6 and 9), and the indicator (100) is preferably displayed on the gauge lever cover part (110) in the arc-shaped groove (120) or around the arc-shaped groove (120). The drawing illustrates that the indicator (100) is provided on both ends of the arc-shaped groove (120) (see FIGS. 6 and 9).

In addition, it is preferable to further provide a limit switch (not shown) that is pressed by the first link (60) or the gauge lever (80) when the first link (60) is rotated to its maximum (limit rotation), and a notification unit (not shown) that notifies whether the limit switch is operated when the limit switch is operated.

Here, the maximum rotation (limit rotation) refers to the degree of rotation at which the first link (60) is rotated by the elastic force of the torsion spring (40) to press the link chain (5) by the pressing portion (63) and the tension can be adjusted by pressing. If this is exceeded, the degree of sagging is too great to adjust the tension by pressing the pressing portion (63) or the link chain (5) is broken, making it impossible to adjust the tension of the link chain (5).

At this time, the notification unit can be a buzzer or a warning light.

In this way, the present invention further comprises a limit switch that is pressed by the first link (60) or the gauge lever (80) when the first link (60) is rotated to its maximum (limit rotation), and a notification unit that notifies whether the limit switch is operated when the limit switch is operated, so that the manager can be notified of the timing for checking the link chain, thereby preventing malfunction due to the link chain in advance.

It is preferable that the width of the pressing portion (63) perpendicular to the longitudinal direction of the link chain (5) be wider than the width of the link chain (5) so that the entire link chain (5) is pressed.

In addition, it is preferable that the present invention further comprises a bearing (31) that allows the rotation shaft (30) to be rotatably fixed inside the body (20), and a bearing fixing bracket (130) that allows the bearing (31) to be fixed to the body (20). The bearing fixing bracket (130) is preferably fixed together with the main body (7) when the bearing (31) is fixed to the body (20), and when the bearing is fixed to the main body (7), the gauge lever cover part (110) is also preferably fixed together.

The above gauge lever cover part (110) is composed of an inner cover (111) and an outer cover (112), as shown in FIG. 6 and FIG. 8.

The inner cover (111) is fixed when the bearing fixing bracket (130) is fixed to the main body (7) (see FIGS. 8 and 9), and the outer cover (112) is fixed by being combined with the inner cover (111) (see FIGS. 6 and 8).

The technical idea should not be interpreted limited to the above-described embodiments of the present invention. The scope of application is diverse, and various modifications can be implemented at the level of those skilled in the art without departing from the gist of the present invention claimed in the claims. Accordingly, such improvements and modifications fall within the scope of protection of the present invention as long as they are obvious to those skilled in the art.

1: bend 2: drive shaft
2a: Drive sprocket 3: Drive motor
4: Drive shaft 4a: Drive sprocket
5: Link chain 5a: Inner plate
5b: Outer plate 5c: Connect pin
5d: roller 6: belt
7: Body 10: Conveyor
20: Body 21: Opening
30: Rotating shaft 31: Bearing
40: Torsion spring 50: Bracket for fixing spring
60: First link 61: Rotating shaft joint
62: Extension part 63: Pressing part
70 : Hook 80 : Gauge lever
90 : Direction part 100 : Display part
110: Gauge lever cover 111: Inner cover
112: Outer cover 120: Arc-shaped groove
130: Bracket for fixing bearing

Claims (3)

A conveyor comprising a drive shaft (2) equipped with a drive sprocket (2a), a drive motor (3) that rotates the drive shaft (2), a driven shaft (4) equipped with a driven sprocket (4a), a link chain (5) that connects the drive sprocket (2a) and the driven sprocket (4a) to form an endless track and is rotated by the rotation of the drive shaft (2) by the drive motor (3), a belt (6) that is connected to the link chain (5) and forms an endless track and is rotated in conjunction with the rotation of the link chain (5) to transport a transported object, and a main body (7) on which the drive shaft (2) and the driven shaft (4) are rotatably installed, and is installed on a conveyor (10) that is equipped with a bent portion (1) having a predetermined angle to change the transport angle and transport the transported object, and supports the link chain (5) at the bent portion (1) to prevent sagging of the link chain (5). In the chain sagging prevention device,
A body (20) that is fixed to the inside of the main body (7) where the above-mentioned bending part (1) is located and has an opening (21) provided on one side located in the same direction as the longitudinal direction of the link chain and has a hollow interior;
A rotation shaft (30) that is rotatably installed inside the body (20) perpendicular to the longitudinal direction of the link chain (5);
A torsion spring (40) provided inside the housing (20) to surround the rotation shaft (30) on the outside of the rotation shaft (30);
A spring fixing bracket (50) provided inside the above-mentioned body (20) and fixing one end of the above-mentioned torsion spring (40) to the above-mentioned body (20);
A first link (60) having a rotation shaft coupling portion (61) provided at one end and coupled to the outside of the rotation shaft (30) to rotate in conjunction with the rotation shaft (30), an extension portion (62) that is formed to extend long from the rotation shaft coupling portion (61) to the outside of the body (20) through the opening (21), and a pressing portion (63) that is formed to protrude in an arc shape at the bottom of the extension portion (62) located at the outside of the body (20) and presses the upper portion of the link chain (5);
A catch portion (70) which is provided on one side of the extension portion (62) of the first link (60) so as to protrude perpendicularly to the longitudinal direction of the link chain (5) and has one end fixed by the spring fixing bracket (50) such that the other end of the torsion spring (40) is caught so that torsion force is applied to the torsion spring (40), thereby rotating the extension portion (62) of the first link (60) by the torsion force of the torsion spring (40) and thereby the pressing portion (63) presses the link chain (5), thereby maintaining the tension of the link chain (5) in the bent portion (1) and preventing sagging of the link chain (5);
A conveyor chain sagging prevention device characterized by comprising: In paragraph 1,
One end of the above rotation shaft (30) is extended and installed on the outside of the main body (7),
A gauge lever (80) installed on the outside of the main body (7) and fixed to one end of the rotation shaft (30) with one end extended, and rotated in conjunction with the first link (60) when the first link (60) rotates by the elastic force of the torsion spring (40);
An indicator (90) provided on the other end of the gauge lever (80) and used to indicate the rotation angle of the gauge lever (80);
A conveyor chain sagging prevention device characterized by further including a display unit (100) for displaying the rotation angle of the above instruction unit (90) in a numerical value or degree. In the second paragraph,
A gauge lever cover part (110) is further provided, which is fixedly installed on the outside of the main body (7) and is installed to accommodate one end of the extended rotation shaft (30) and the gauge lever (80).
The above gauge lever cover part (110) is formed with an arc-shaped groove (120) having a radius corresponding to the distance at which the indicator (90) is located from one end of the gauge lever (80) fixed to one end of the rotation shaft (30) so that the indicator (90) provided on the gauge lever (80) can be confirmed.
A conveyor chain sagging prevention device characterized in that the above display part (100) is displayed on the gauge lever cover part (110) in the arc-shaped groove (120) or around the arc-shaped groove (120).

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