JP6096264B2 - Continuous furnace - Google Patents

Description

  The present invention relates to a continuous furnace for performing a heat treatment on an object to be processed mounted on a mesh belt.

  As for the continuous heat treatment furnace, the type of the heat treatment furnace is classified according to the method of conveying the object to be processed, and a mesh belt type heat treatment furnace can be given as an example (see, for example, Patent Document 1).

  The mesh belt type heat treatment furnace has a configuration in which an object to be processed is mounted on a mesh belt and conveyed to an outlet through a heating chamber and a cooling chamber. Therefore, the mesh belt is contaminated with abrasion powder of the mesh belt, components generated from the object to be processed, and oxidized scale of the mesh belt.

  Therefore, in order to remove dirt on the mesh belt, a technique for ultrasonic cleaning by passing the mesh belt through the cleaning water in the cleaning water tank has been developed.

JP 2009-014227 A

  The mesh belt passing through the continuous furnace expands and contracts due to thermal changes.

  The objective of this invention is providing the continuous furnace which can move the mesh belt which mounts a to-be-processed object stably.

The continuous furnace of the present invention includes an endless mesh belt, a first table roller, a second table roller, a belt driving mechanism, a member that forms play, and a cleaning member, and a mesh. A heat treatment is performed on the workpiece mounted on the belt. The mesh belt has a first area on which the object to be processed is mounted and conveyed , and a second area on which the object to be processed is not mounted. The first table roller is stretched by a mesh belt and forms an upstream end of the first region in the conveyance direction of the workpiece. A mesh belt is stretched over the second table roller, and an end portion on the downstream side of the first region in the conveyance direction of the workpiece is formed. The belt driving mechanism gives the mesh belt a driving force in the moving direction according to the conveying direction of the workpiece . The member forming the play forms a play that is displaced up and down in accordance with expansion and contraction in the moving direction in a part of the second region . The play is located downstream of the portion receiving the driving force from the belt driving mechanism in the second region in the moving direction and adjacent to the portion receiving the driving force from the belt driving mechanism with the member forming the play interposed therebetween. Yes. The cleaning member is a member that removes dirt by slidingly contacting the mesh belt in the second region, and is in sliding contact with the mesh belt at a position between the play in the second region and the first table roller.

  ADVANTAGE OF THE INVENTION According to this invention, the mesh belt carrying a to-be-processed object can be moved stably.

It is a figure which shows the structure of the continuous furnace which concerns on 1st Embodiment of this invention. It is a figure which shows the structure of the belt cleaning apparatus with which the same continuous furnace is provided. It is a figure which shows the modification of FIG. It is a figure which shows another structure of the same belt cleaning apparatus. It is a figure which shows another structure of the same belt cleaning apparatus. It is a figure which shows another structure of the same belt cleaning apparatus. It is a figure which shows the structure of the belt cleaning apparatus which combined two or more.

  Hereinafter, a continuous furnace according to an embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram showing a configuration of a continuous furnace 100 according to the first embodiment of the present invention.

  The continuous furnace 100 includes a heating chamber 110, a cooling chamber 120, table rollers 130 and 140, a free roller 150, a belt driving mechanism 160, a belt cleaning device 200, and a mesh belt 210.

  The heating chamber 110 heats the workpiece W and heats the workpiece W by maintaining the room at about 900 degrees. The cooling chamber 120 is water-cooled or air-cooled, and the inside is composed of a neutral atmosphere. The cooling chamber 120 cools the workpiece W heated by the heating chamber 110.

  The table rollers 130 and 140 stretch an endless mesh belt 210. The free roller 150 is a second roller of the present invention and rotates following the movement of the mesh belt 210, and forms a play 211 of the mesh belt 210 between the pusher roller 163 described later.

  The belt drive mechanism 160 includes a drive drum 161, pusher rollers 162 and 163, a chain 164, and a drive motor 165. The drive drum 161 moves the mesh belt 210 by winding the mesh belt 210 around its outer peripheral portion and being driven and rotated by the drive motor 165. The pusher roller 162 guides the mesh belt 210 to the drive drum 161 while applying tension to the mesh belt 210.

  The pusher roller 163 is a first roller (a member that forms play) of the present invention, and forms a play 211 of the mesh belt 210 between the pusher roller 163 and the free roller 150. The chain 164 is made of metal as an example, and stretches the drive drum 161 and the drive motor 165. The drive motor 165 drives the drive drum 161 via the chain 164. Drive motor 165 moves mesh belt 210 in the direction of arrow 212 by rotating chain 164 in the direction of arrow 166. Therefore, the workpiece W mounted on the mesh belt 210 moves in the direction of the arrow 170, that is, from the heating chamber 110 to the cooling chamber 120.

  The belt cleaning device 200 is a device for cleaning the endless mesh belt 210 that has passed through the heating chamber 110 and the cooling chamber 120. Details thereof will be described later.

  As an example, the mesh belt 210 is made of a metal having high corrosion resistance and high heat resistance. This is because the mesh belt 210 needs to pass through the heating chamber 110 on which the workpiece W is mounted and maintained at a high temperature as described above. The mesh belt 210 is formed in an endless shape, and is a belt for mounting and transporting the workpiece W.

  As described above, the mesh belt 210 forms the play 211 between the free roller 150 and the pusher roller 163. Since the mesh belt 210 passes through the heating chamber 110 maintained at a high temperature and then passes through the cooling chamber 120, the mesh belt 210 itself expands and contracts. Therefore, the play 211 is formed to correspond to the expansion and contraction of the mesh belt 210.

  FIG. 2 is a diagram illustrating a configuration of the belt cleaning device 200.

  The belt cleaning device 200 includes a first cylindrical brush member 220 and a second cylindrical brush member 230.

  The first cylindrical brush member 220 is disposed in a region where the workpiece W is not mounted, and is in sliding contact with the mounting surface of the workpiece W on the mesh belt 210. The second cylindrical brush member 230 is disposed to face the first cylindrical brush member 230 and is in sliding contact with the non-mounting surface of the workpiece W in the mesh belt 210. In addition, the area | region where the to-be-processed object W is not mounted is the area | region 180 shown in FIG.

  In the present embodiment, the first cylindrical brush member 220 and the second cylindrical brush member 230 are used in a state where the central axis is fixed. That is, the first cylindrical brush member 220 and the second cylindrical brush member 230 are used as fixed brushes. If the fixed brush has a cylindrical shape, if the sliding contact surface with the mesh belt 210 has deteriorated, the other portion of the cylindrical shape may be used on the sliding contact surface, so it can be used for a long time as a fixed brush. is there.

  In addition, as shown in FIG. 3, you may use a plane brush as a fixed brush. That is, the first flat brush member 220A is disposed in a region where the workpiece W is not mounted, is in sliding contact with the mounting surface of the workpiece W on the mesh belt 210, and the second flat brush member 230A is the first plane. It arrange | positions facing brush member 220A and slidably contacts the non-mounting surface of the to-be-processed object W in the mesh belt 210.

  In this configuration, the first cylindrical brush member 220 (first flat brush member 220A) is slidably brought into contact with the mounting surface of the workpiece W on the mesh belt 210, and the second cylindrical brush member 230 (second flat brush member 230A) is brought into contact. The dirt on the mesh belt 210 can be removed only by sliding the mesh belt 210 on the non-mounting surface of the workpiece W. Therefore, the dirt of the mesh belt 210 can be removed without requiring cleaning water.

  FIG. 4 is a diagram illustrating a configuration of another belt cleaning device 200.

  The 1st cylindrical brush member 221 and the 2nd cylindrical brush member 231 of this embodiment are comprised rotatably. The belt cleaning device 200 further includes a drive mechanism 240 for driving the first cylindrical brush member 221 and the second cylindrical brush member 231 to rotate about the central axis thereof.

  The drive mechanism 240 includes a chain 241 and a drive motor 242. The chain 241 is formed in an endless shape, and is made of metal as an example. The chain 241 is stretched over the sprocket 242A of the drive motor 242, the sprocket 222 of the first cylindrical brush member 221 and the sprocket 232 of the second cylindrical brush member 231, and meshes with the sprocket 242A, sprocket 222 and sprocket 232. . The drive motor 242 transmits driving force to the first cylindrical brush member 221 and the second cylindrical brush member 231 via the chain 241.

  The chain 241 receives the driving force from the driving motor 242 and rotates in the arrow 243 direction. Accordingly, the first cylindrical brush member 221 rotates in the arrow 223 direction, and the second cylindrical brush member 231 rotates in the arrow 233 direction. That is, the drive mechanism 240 rotates the first cylindrical brush member 221 and the second cylindrical brush member 231 in the same direction so that the outer peripheral surfaces of the first cylindrical brush member 221 and the second cylindrical brush member 231 are meshed with the mesh belt 210. Slide.

  Further, since the mesh belt 210 moves in the direction of the arrow 212, the first cylindrical brush member 221 rotates in the direction opposite to the moving direction of the mesh belt 210 on the sliding contact surface with the mesh belt 210, and the second cylindrical brush member. 231 rotates in the same direction as the moving direction of the mesh belt 210 on the sliding contact surface with the mesh belt 210. The peripheral speed of the second cylindrical brush member 231 and the moving speed of the mesh belt 210 are different.

  On the surface of the mesh belt 210 on which the workpiece W is mounted, dirt such as abrasion powder of the mesh belt, components generated from the workpiece W, and oxidized scale of the mesh belt are likely to adhere. Accordingly, since the first cylindrical brush member 221 rotates in the direction opposite to the moving direction of the mesh belt 210 on the sliding contact surface with the mesh belt 210, the mounting surface of the workpiece W on the mesh belt 210 is efficiently cleaned. be able to.

  Further, the non-mounting surface of the object to be processed W in the mesh belt 210 is less contaminated with components generated from the object to be processed W and dirt such as oxide scale of the mesh belt as much as the mounting surface of the object to be processed W. Accordingly, since the second cylindrical brush member 231 rotates in the same direction as the moving direction of the mesh belt 210 on the sliding contact surface with the mesh belt 210, the non-mounting surface of the workpiece W on the mesh belt 210 is appropriately cleaned. The deterioration of the second cylindrical brush member 231 can be suppressed more than the deterioration of the first cylindrical brush member 221.

  In other words, in this configuration, the mesh belt 210 can be efficiently cleaned according to how easily the mesh belt 210 becomes dirty.

  FIG. 5 is a diagram showing a configuration of another belt cleaning device 200.

  The diameters of the sprocket 222 of the first cylindrical brush member 221 and the sprocket 234 of the second cylindrical brush member 231 are different. Specifically, the diameter of the sprocket 222 is smaller than the diameter of the sprocket 234. Therefore, in this configuration, the drive mechanism 240 rotates the first cylindrical brush member 221 at a higher speed than the second cylindrical brush member 231.

  In this configuration, the first cylindrical brush member 221 rotates at a high speed in the direction opposite to the moving direction of the mesh belt 210 at the sliding contact surface with the mesh belt 210, so that the mounting surface of the workpiece W on the mesh belt 210 is more efficient. Can be cleaned.

  FIG. 6 is a diagram showing a configuration of another belt cleaning device 200.

  The belt cleaning device 200 includes a case 250 and a suction unit 260.

  The case 250 covers the first cylindrical brush member 220 and the second cylindrical brush member 230. The suction unit 260 sucks dust in the case 250.

  The suction unit 260 includes a suction blower 261, a duct 262, and a dust collection filter 263. The suction blower 261 is a device that generates a suction force. The duct 262 connects the case 250 and the suction blower 261. The dust collection filter 263 is provided in the duct 262 and collects dust moving from the case 250 to the suction blower 261.

  In this configuration, the case 250 covers the first cylindrical brush member 220 and the second cylindrical brush member 230, so that the dust of the mesh belt 210 removed by the first cylindrical brush member 220 and the second cylindrical brush member 230 is surrounded by the case 250. It is possible to prevent scattering. Further, the suction part 260 sucks the dust in the case 250, so that the dust can be prevented from being accumulated in the case 250.

  As shown in FIG. 7, the configuration of the cleaning device shown in FIGS. 2 to 6 can be combined.

  Finally, the description of the above-described embodiment is to be considered in all respects as illustrative and not restrictive. The scope of the present invention is shown not by the above embodiments but by the claims. Furthermore, the scope of the present invention is intended to include all modifications within the meaning and scope equivalent to the scope of the claims.

W-processed object 100-continuous furnace 110-heating chamber 120-cooling chamber 200-belt cleaning device 210-mesh belt 220-first cylindrical brush member 220A-first flat brush member 221-first cylindrical brush member 230-first 2 cylinder brush member 230A-2nd plane brush member 231-2nd cylinder brush member 240-drive mechanism 250-case 260-suction part

Claims (2)

A mesh belt formed in an endless shape, the mesh belt having a first region that carries and conveys a workpiece, and a second region that does not carry the workpiece ,
A first table roller on which the mesh belt is stretched to form an upstream end of the first region in the conveying direction of the workpiece;
A second table roller on which the mesh belt is stretched to form an end on the downstream side of the first region in the transport direction;
A belt driving mechanism that gives the mesh belt a driving force in a moving direction according to the conveying direction ;
A member that forms a play that is displaced up and down according to expansion and contraction in the moving direction in a part of the second region;
A cleaning member that slidably contacts the mesh belt in the second region to remove dirt;
With
The play is supplied from the belt drive mechanism with the member that forms the play on the downstream side in the moving direction from the portion that receives the supply of drive force from the belt drive mechanism in the second region. Adjacent to the receiving part,
The cleaning member is in sliding contact with the mesh belt at a position between the play and the first table roller in the second region;
A continuous furnace for performing a heat treatment on the object to be processed mounted on the mesh belt. The belt driving mechanism includes a driving drum that rotates around an axis and supplies the driving force to the mesh belt wound around an outer peripheral portion;
The member forming the play is a first roller disposed at a position downstream of the drive drum in the movement direction in the second region,
A second roller disposed downstream of the first roller in the second region in the moving direction, wherein the mesh belt pulled out from the driving drum and slidably contacting the outer periphery of the first roller further comprising a second roller sliding contact with,
The continuous furnace according to claim 1, wherein the play is formed between the first roller and the second roller.

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