KR102103773B1 - Roller for conveyor - Google Patents

Abstract

The present invention relates to a labyrinth seal structure of a roller for a conveyor comprising: a main body unit including a cylindrical roller pipe housing with a hollow space whose both ends are opened, and an end cap arranged in both opened sides of the roller pipe housing and provided with a cylindrical hollow space; a center unit having a roller shaft penetrating the center of the main body unit to protrude to both ends; a rotating unit having a plurality of bearings between the end cap and the roller shaft; and a sealing unit having a sealing member inserted between the end cap and the roller shaft, wherein the inserted end thereof faces the bearings. An outer wall of the roller pipe housing forms a large-diameter unit and a small-diameter unit, and includes a stepped unit in a section from the large-diameter unit to the small-diameter unit. Both ends consisting of the small-diameter unit are curved inwards to have an inner race flange to form a curved surface on both ends without creating an edge unit to secure safety when a manager or a worker handles a roller. Also, both ends of the roller pipe housing form the stepped unit from the large-diameter unit to the small-diameter unit to place and fix a top plate of the end cap. An end of the curved small-diameter unit comes in contact with the outside of the top plate of the end cap to form a welding connection to markedly improve the connection strength of the roller pipe housing and the end cap to provide stable fixing power. Also, foreign substances are prevented from entering a roller by a sealing structure of the end cap and the roller pipe housing to guarantee continuous rolling of the roller and prevent deformation.

Description

Structure of the labyrinth seal of the conveyor rollers {Roller for conveyor}

The present invention relates to a labyrinth seal structure of a roller for a conveyor, and more specifically, a roller conveyor system configured to enable transport by configuring a plurality of freely rotatable rollers in a conveyor system for transporting objects. It relates to a labyrinth seal structure of a conveyor roller.

2. Description of the Related Art In general, a conveyor is an automatic mechanical device that continuously transports an object while moving a certain distance, and is used in an easy and economical way to transport the object. It is widely used for the transportation of parts and raw materials in factories, including the transportation of coal and ore, and is also the basis for sorting goods and moving devices in warehouses.

The types and uses of conveyors can be divided into belt conveyors, roller conveyors, screw conveyors, chain conveyors, trolley conveyors, etc. Among them, the most widely used belt conveyors are the most widely used systems in mass production factories. , Using a belt made of wire mesh, steel plate, etc., enables transportation. Among them, a rubber belt is most often used. This is moved at a constant speed to place the goods on top, and to carry, process, and assemble. This belt is hooked on a belt wheel in an annular shape, and the belt wheel is rotated by an electric motor to move. If the belt is one, the length can be up to 2000m horizontally. An idler can be used to prevent the belt from sagging along the way, and a groove-shaped idler is used to slightly concave the middle of the belt when transporting materials such as coal and grain.

In addition, a roller conveyor is arranged with a plurality of rollers that can rotate freely, and goods are transported using the rolling properties of the rollers. It can be pushed by hand or given a slight incline to roll the item under its own weight, or it can be driven by a belt.

For the configuration of the roller for the conveyor used in the roller conveyor system, the Republic of Korea Patent No. 10-0844179, as shown in Figure 1 of the present specification, the support shaft is fixed to both ends are inserted into the support yoke of the conveyor device, In forming a bearing sealing device for a roller for a conveyor composed of a cylindrical case-shaped body case that is welded to both sides of a bearing housing and rotates around a support shaft by a bearing, a wing plate is formed on the outer circumferential surface of the center of the cylindrical body. , On one side of the wing plate, a first wing frame protrudes toward the outside of the bearing housing. On the other side of the wing plate, a third wing frame having a smaller diameter than the second wing frame and the second wing frame protrudes toward the inside of the bearing housing. The inner labyrinth seal is forcibly fitted to the outer circumference of both sides of the support shaft, and is fixedly coupled with the support shaft. There are posted bearing sealers for conveyor rollers.

However, in the prior art, an edge may be generated at the end of the body case, which may cause a safety hazard when the administrator handles the roller, and also the body case and the bearing housing form a fixing force through only welding connection, thereby continuously rotating and rotating the roller. In the event of an impact due to the load of an object, there may be a problem that a welding part may be damaged and a roller may be damaged due to this.

Republic of Korea Patent Registration No. 10-0844179 (2008.06.30)

In order to solve the problems as described above, in the present invention, the edge portions are not generated at both ends of the roller tube housing, and the binding strength of the end caps coupled to the roller tube housing is improved to maintain a stable fixed state and seal at the same time. It is an object of the present invention to provide a labyrinth seal structure of a roller for a conveyor that solidifies the structure to minimize damage and deformation.

In order to achieve the purpose, the main body part and the center of the main body part are provided with a roller tube housing having a hollow with both ends opened in a cylindrical shape and an end cap having a cylindrical hollow inside both open sides of the roller tube housing. A sealing member that is inserted between the end portion and the roller shaft and a rotation portion provided with a plurality of bearings between the end cap and the roller shaft and a center portion provided with a roller shaft protruding through both ends and the end cap and the roller shaft facing the bearing. Made of a sealing portion provided, the outer wall of the roller tube housing forms a large-diameter portion and a small-diameter portion, and a section consisting of a small-diameter portion in the large-diameter portion includes a stepped portion, and both ends of the small-diameter portion are curved inward to form an inner ring flange. It is a labyrinth seal structure of a roller for a conveyor.

In another aspect of the present invention, the plate facing toward the outside of the end cap is configured to be extended so as to be placed on the stepped portion, and the curved inward end of the inner ring flange and the outer surface of the plate are contacted and welded.

As described above, the roller for the conveyor according to the present invention can secure the safety when handling the manager or operator by forming a curved surface without generating edge portions at both ends, and also a stepped portion consisting of both ends of the roller tube housing from the large diameter portion to the small diameter portion. Formed, the top plate of the end cap is mounted and fixed, and the end portion of the small-diameter curved portion is brought into contact with the outside of the top plate of the end cap to form a welding bond, so that the bonding strength between the roller tube housing and the end cap is remarkably improved and stable fixing force Can provide

In addition, through the sealing structure of the roller tube housing and the end cap, foreign substances are not introduced into the roller to ensure continuous rolling of the roller, to prevent deformation, and through the construction of the sealing part using a labyrinth seal, fluids using small gaps By lowering the pressure, it is possible to prevent fluid leakage to the outside and to prevent foreign matter from entering.

1 is a cross-sectional view of a bearing sealing device of a conventional conveyor roller.
Figure 2 is a cross-sectional view of the labyrinth seal structure of the conveyor roller according to the present invention.

A roller conveyor is a technology device that is a continuous moving device in the field of transport automation machinery, and refers to an unmanned or automated system for transporting and transporting materials, parts, products, etc. using multiple freely rotating rollers. In addition, the continuous moving device of the conveying automation machine includes a conveyor system that can transport materials or semi-finished products such as a roller conveyor, a belt conveyor, a wheel conveyor, a chain conveyor, a tilt tray conveyor, an apron conveyor, and a chute conveyor.

As a component constituting the roller conveyor, FIG. 2 is a cross-sectional view of a labyrinth seal structure embodiment of a roller for a conveyor according to the present invention, and the detailed configuration of the present invention will be described with reference to this.

In the labyrinth seal structure of a roller for a conveyor including a roller shaft configured to protrude both ends with a central axis of the present invention, the roller tube housing 110 and the roller tube housing 110 having a hollow with both ends opened in a cylindrical shape ( Inside the opened both sides of 110) the body portion 100 is provided with an end cap 120 having a cylindrical hollow; and a central portion provided with a roller shaft that protrudes from both ends through the center of the body portion 100; and The end portion 120 and the rotary shaft 200 is provided with a plurality of bearings 210 between the roller shaft; and the end portion of the end face 120 and the arcuate edge portion of the end cap 120 is in close contact with the other end of the roller A sealing portion comprising an outer labyrinth seal 310 and an inner labyrinth seal 320 provided inside the outer labyrinth seal 310 that are in parallel with the shaft outer surface and are in contact with the rotating part 200. 300); The outer wall of the roller tube housing 110 forms a large-diameter portion 111 and a small-diameter portion 112, and a section consisting of the small-diameter portion 112 in the large-diameter portion 111 includes a stepped portion 113, , The inner ring flange 114 is formed by bending both ends of the small diameter portion 11 inward. At this time, a plate spring 410 installed between the rotating parts 200 may be additionally provided inside the sealing part 300. In detail, the small-diameter portion 112 is configured to be curved in an arc shape, and the end face of the inner ring flange 114 is parallel to the upper surface of the stepped portion 113, and when limiting dimensions, The large-diameter portion 111 has a thickness of 4.5 mm, and the small-diameter portion 112 has a thickness of 2.0 mm.

By installing a plurality of rollers for the conveyor, it is possible to facilitate the movement of large quantities or items, and other operations and transport, such as processes and inspections, can be simultaneously performed. In addition, by varying the shape and size of the conveyor roller, it can be flexible at the installation location, can be installed or extended at various locations, and can have flexibility in the shape of a path or passage.

As a structural feature for improving the bonding strength to maintain continuous and stable rolling properties of the conveyor roller, the plate facing outward of the end cap 120 is extended and configured to be mounted on the stepped portion 113. The primary bonding force is provided, and the curved inward end of the inner ring flange 114 and the outer surface of the plate come into contact with each other to weld and provide a secondary bonding force. In addition, the configuration in which the outer plate of the end cap 120 extends and the inner ring flange 114 covers the outer plate to be welded can ensure a sealing structure in which foreign matter does not enter the roller.

In addition, the labyrinth seal is a seal that reduces the amount of leakage by allowing only a slight air leakage due to the pressure drop that the liquid and gas leaking to the outside pass through the fine gap several times. As a component that can improve the sealing unit 300 in the present invention.

In detail, the outward end portion is configured to be in contact with the outer surface of the end cap 120 that is curved and inward, and the inner surface extending from the end contacting the end cap 120 forms an arc-shaped groove and has an uneven shape. The first protrusion 311 and the second protrusion 312 are formed to protrude toward the inside, and the grooves extending from the second protrusion 312 include the first protrusion 311 and the second protrusion 312. It is characterized by a larger diameter than the groove between. In addition, the inner labyrinth seal 320 is provided with a support bar 321 that is in contact with the circumferential surface descending from the edge portion of the arc shape of the end cap 120, so that the end is brought into contact with the top of the rotating part 200. ,

In the section in which the arc-shaped corner portion of the end cap 120 is formed in a straight line, the inner side of the support bar 321 protrudes and extends, and the third projection portion 322 and the fourth projection portion having an uneven shape parallel to the roller shaft. (323) is provided, the third projection 322 and the fourth projection 323 is configured to be spaced apart from the groove of the outer labyrinth seal (310). In addition, the end portion of the fourth projection 323 is configured to be bent toward the roller shaft and extends, and a sealing portion 300 is formed.

Through the present invention as described above, the labyrinth seal structure of the roller for the conveyor can secure the safety at the time of handling by the manager or operator by making curved surfaces without generating sharp edges at both ends, and also at both ends of the roller tube housing. Forming a stepped portion made of a small diameter portion, the upper surface of the end cap is mounted and fixed, and the end portion of the curved small diameter portion is in contact with the outside of the upper surface of the end cap to form a welding bond, thereby increasing the bonding strength between the roller tube housing and the end ring. Significantly improved, it is possible to provide a stable fixing force.

In addition, through the sealing structure of the roller tube housing and the end cap, foreign substances are not introduced into the roller to ensure continuous rolling of the roller, to prevent deformation, and through the construction of the sealing part using the labyrinth seal structure of the conveyor roller. By lowering the pressure of the fluid using the gap, it is possible to prevent fluid leakage to the outside and to prevent foreign matter from entering.

Although the present invention has been illustrated and described in connection with specific embodiments and application examples, it is common knowledge in the art that various modifications and changes are possible without departing from the spirit and scope of the invention as indicated by the appended claims. Anyone who has a will know easily.

100. Body 110. Roller tube housing
111. Large Gyeongbu 112. Small Gyeongbu
113. Step 114. Inner ring flange
120. End cap 200. Rotating part
210. Bearing 300. Sealing part
310. External labyrinth seal 311. 1st protrusion
312. The second protrusion 320. Internal labyrinth seal
321. Support bar 322. Third projection
323. The third projection

Claims (3)

The body portion 100 and the roller tube housing 110 having a hollow with both ends opened in a cylindrical shape and an end cap 120 having a cylindrical hollow are provided inside both opened sides of the roller tube housing 110. Between the end cap 120 and the roller shaft, there is a rotating portion 200 provided with a plurality of bearings 210 and an end portion in which an arcuate edge portion and an end face of the end cap 120 are in close contact, and the other end has a roller shaft and the like. A sealing part 300 including an outer labyrinth seal 310 and an inner labyrinth seal 320 provided inside the outer labyrinth seal 310 that are parallel to the side and are in contact with the rotating part 200. In the labyrinth seal structure of the roller for the conveyor, which is made of, and includes a roller shaft configured to protrude both ends with a central axis,
The outer end of the outer labyrinth seal 310 is curved and configured to come into contact with the outer surface of the end cap 120, and the inner surface leading from the end contacting the end cap 120 has an arcuate groove It is configured to form a concave-convex shape, the first projection 311 and the second projection 312 is formed protruding toward the inside and the groove extending from the second projection 312 is formed with the first projection 311 and the first The diameter between the two protrusions 312 wider than the groove is included,
The inner labyrinth seal 320 is provided with a support bar 321 which is in contact with the circumferential surface descending from the edge portion of the arc shape of the end cap 120, and has an end connected to the upper end of the rotating part 200,
In the section in which the arc-shaped corner portion of the end cap 120 is formed in a straight line, the inner side of the support bar 321 protrudes and extends, and the third projection portion 322 and the fourth projection portion having an uneven shape parallel to the roller shaft. (323) is provided, the third projection 322 and the fourth projection 323 is included spaced apart from the groove of the outer labyrinth seal (310)
The end of the fourth protrusion 323 is bent toward the roller shaft and extends,
The end cap 120 toward the outside of the plate is configured to extend to be mounted on the stepped portion 113 to provide a primary bonding force, and the curved inward end of the inner ring flange 114 contacts the outer surface of the plate It is welded to provide a secondary bonding force, and includes a configuration in which the outer plate of the end cap 120 extends and the inner ring flange 114 covers and welds the outer plate so that foreign matter does not enter the roller. Ensuring the sealing structure,
Through the sealing structure of the roller tube housing 110 and the end cap 120, foreign substances are not introduced into the roller to ensure continuous rolling of the roller, to prevent deformation, and through the configuration of the sealing part 300, small A labyrinth seal structure of a conveyor roller, characterized in that the pressure of a fluid using a gap is reduced to prevent fluid leakage to the outside and to prevent foreign matter from entering.



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