JPH0552694U - Continuous heating furnace - Google Patents

Abstract

(57) [Summary] [Purpose] Even if the heat-treated material placed on the upper surface of the conveyor belt passing through the heating furnace sways or jumps up due to the vibration of the conveyor belt during passage, the side edge of the conveyor belt The purpose is to prevent it from overflowing from the department. [Structure] A transfer area 5 of a transfer belt 4 for transferring a material to be heat treated a is set inside a heating furnace 1, and a roller 3 for supporting the transfer belt 4 from below is provided on a lower surface of the transfer area 5 in a traveling direction of the transfer belt 4. A large number of support receivers 11 are installed in parallel along with each other, and the left and right ends of the adjacent rollers 3 are provided with support receiving members 11 for supporting the side end portions of the transport belt 4 from below and loosening the central portion 4 '. This is the configuration provided.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention mainly relates to a continuous heating furnace for performing heat treatment for quenching or tempering a metal heat-treated material.

[0002]

[Prior Art]

 As a conventional continuous heating furnace, for example, as shown in FIG. 6, a large number of rollers 3 are arranged in parallel on the upper surface of a hearth 2 provided at the bottom of a long tunnel-shaped heating furnace 1 and forced along the length direction. It is arranged so as to rotate, for example, an upper conveying area 5 of an endless conveying belt 4 made of a mesh belt is located on the upper surface of the roller 3, and a lower non-conveying area 6 of the conveying belt 4 is a hearth. 2. The material to be heat-treated is passed through the lower side of the heating zone 2 and placed on a placing part 7 installed at one end of the transport area 5. The transport zone 4 moves the inside of the heating furnace 1. The discharge portion 8 at the other end of the region 5 is configured to discharge to the outside of the heating furnace 1. Then, within the space between the adjacent rollers 3, the conveyor belt 4 bends and forms a valley shape due to the weight of the material to be heat treated, and the material to be heat treated overflows from the side end portion of the conveyor belt 4 or the material to be heat treated is interleaved. In order to prevent the rollers from being rubbed against each other and damaged, a heat-resistant block 9 is installed in the entire length of the roller 3 along the length direction of the roller 3.

[0003]

[Problems to be solved by the device]

 However, since the block 9 described above cannot be provided in contact with the roller 3, a narrow gap is generated between the block 9 and the roller 3. Therefore, when the conveyor belt 4 on which the material to be heat treated is placed passes on the upper surface, the material to be heat treated oscillates due to the weight of the material to be heat treated to form a loose valley between the block 9 and the roller 3. For this reason, particularly when the material to be heat treated is comparatively fine such as bolts and nuts, and when the transport speed of the transport belt 4 is high, it jumps up or floats up and overflows from the side end of the transport belt 4, and the hearth of the heating furnace. There are many things that can be accumulated in. Further, since the lower surface of the conveyor belt 4 moves while rubbing against the upper surface of the block 9, it is worn out by friction and must be replaced in a short period of time. Therefore, there is a demand for a continuous heating furnace that can reliably heat-treat a material to be heat-treated without spilling from the side end portion of the conveyor belt 4 even if the material to be heat-treated swings.

[0004]

[Means for Solving the Problems]

 The present invention has been proposed in view of the above-mentioned conventional drawbacks and in order to meet the demands of the prior art. A transfer zone of a transfer zone for transferring a material to be heat-treated is set inside the heating furnace, and the above-mentioned transfer is performed. A large number of rollers supporting the conveyor belt from below are installed in parallel along the traveling direction of the conveyor belt on the lower surface of the area, and the side edges of the conveyor belt are supported from below at the left and right ends between adjacent rollers. The present invention relates to a continuous heating furnace, which is provided with a support bracket for loosely denting the central portion.

[0005]

[Action]

 According to the continuous heating furnace of the present invention, the left and right side ends of the conveyor zone 4 are supported from below by the support brackets, so that the material to be heat-treated passes on the upper surface. However, the central part of the conveyor belt 4 is slightly recessed due to the weight of the material to be heat-treated, and even if the material to be heat-treated is small, it approaches the central part, so it does not overflow from the side edge of the conveyor belt 4. ..

[0006]

【Example】

 Embodiments of the present invention will be described below in detail with reference to the drawings. The continuous heating furnace of the present invention has basically the same structure as the conventional heating furnace 1 described above, and a large number of rollers 3 are arranged in parallel on the upper surface of the hearth 2 of the heating furnace 1. The endless conveyor belt 4 made of a mesh belt is placed on the upper surface of the roller 3, and the non-conveyance area 6 of the conveyor belt 4 is passed under the hearth 2 to convey the material to be heat-treated. It is placed on the placing part 7 installed at one end of the heating furnace 1 and passed through the inside of the heating furnace 1 by the movement of the conveying zone 4, heat-treated, and the outside of the heating furnace 1 at the discharging portion 8 at the other end of the conveying area 5. It is discharged to.

The heating furnace 1 according to the present invention does not have the block 9 as in the prior art, and the side edges of the conveyor belt 4 are attached to the left and right ends from the bottom within the space between the adjacent rollers 3. The support receiving member 11 is provided for supporting and for gently recessing the central portion 4 ′ of the transport belt 4.

According to the embodiment of the present invention shown in FIGS. 2 and 3, the support receiver 11 is shown as a short auxiliary roller 12, and two auxiliary rollers 12 are provided between the adjacent rollers 3 in a left-right pair. .. The auxiliary rollers 12 are individually provided at the end portions of the support shafts 13, and the support shafts 13 rotatably penetrate the furnace wall 1 ′ of the heating furnace 1 and the end portions are bearing portions 14. It is supported. The upper surface of the roller 3 and the upper surface of the auxiliary roller 12 are located at substantially the same height.

Therefore, when the conveyor belt 4 having the material a to be heat-treated a thereon passes through the inside of the heating furnace 1, the conveyor belt 5 is supported from below by a large number of rollers 3 at a narrow interval in the conveyor area 5, and has almost the entire length. Since the left and right side end portions are supported from below by the support receiving member 11, even if the weight of the material to be heat-treated a acts, the central portion 4'is loosely dented between the adjacent rollers 3, and The material a to be heat treated a is brought close to the central portion 4 '. In particular, even if the material to be heat-treated a is relatively fine and swings or jumps up due to the mountain-shaped portion of the roller 3, the transport belt 4 is gently inclined downward toward the central portion 4 ′, so that the central portion 4 ′ is They will come together and will not overflow from the side edges of the conveyor belt 4. Therefore, the material a to be heat treated a can be reliably transported from the placing portion 7 to the discharging portion 8 while being heat treated. Since each auxiliary roller 12 of the support receiving member 11 is rotatable, it hardly gives friction to the conveyor belt 4, so that the side end portion of the conveyor belt 4 is less likely to be worn.

Another embodiment of the present invention shown in FIGS. 4 and 5 shows a case where a heat-resistant plate member 21 is used as the supporting member 11. The plate member 21 has an L-shape composed of a horizontally-oriented receiving piece 22 and a vertically-oriented mounting piece 23, and is located at almost the entire distance between the adjacent rollers 3, and the mounting piece 23 is provided on the furnace wall 1 '. The receiving piece 22 is attached to the tip of the fixed shaft 24, and receives the side end portion of the conveyor belt 4 from below. Therefore, also in this embodiment, similarly to the above-described embodiments, when the conveyor belt 4 having the material to be heat-treated a to be heat-treated a on its upper surface passes through the inside of the heating furnace 1, the rollers 3 at appropriate intervals in the conveyor area 5 are provided. Is supported from below and the left and right side end portions of almost the entire length are supported from below by the receiving pieces 22 of the support receiving member 11, so that even if the weight of the material to be heat-treated a acts on it, it may occur between the adjacent rollers 3. As a result, the central portion 4'is loosely dented, and the heat-treated material a on the upper surface is moved to the central portion 4'even if it rocks or jumps up. For this reason, the material to be heat treated a does not overflow from the side end portion of the conveyor belt 4.

The present invention has been described above based on the embodiments of the drawings. However, the present invention is not limited to the above embodiments, and is not limited to the embodiments described in the claims for utility model. It can be carried out at any time.

[0012]

[Effect of the device]

 In summary, according to the present invention, the transport zone for transporting the material to be heat-treated is set inside the heating furnace, and the rollers supporting the transport zone from below are provided on the lower surface of the transport zone along the traveling direction of the transport zone. Multiple parallel installations are provided, and at the left and right ends between adjacent rollers, support supports for supporting the side ends of the conveyor belt from below and gently recessing the central part are provided. Therefore, even if the material to be heat-treated, which is placed on the upper surface of the transport zone of the transport zone and passes through the heating furnace, sways or jumps up by the rollers, it goes to the central part of the transport zone. There is little chance of falling from the edge. Further, since the side edges of the conveyor belt are only supported by the supporting brackets, they are less likely to wear due to friction with the supporting brackets and can be used for a long period of time, which makes them economical and of practical value. Will be high.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional side view showing an embodiment of the present invention.

FIG. 2 is a vertical front view of FIG.

3 is a cross-sectional plan view of a portion of FIG.

FIG. 4 is a vertical sectional front view showing another embodiment of the present invention.

5 is a cross-sectional plan view of a portion of FIG.

FIG. 6 is a vertical sectional side view of a conventional continuous heating furnace.

[Explanation of symbols]

 1 Heating Furnace 2 Hearth 3 Roller 4 Conveying Zone 5 Conveying Area 6 Non-Conveying Area 7 Placement Section 8 Ejection Section 9 Block 11 Support Receiver 12 Auxiliary Roller 13 Support Shaft 14 Bearing Part 21 Plate Material 22 Receiving Piece 23 Mounting Piece 24 Shaft

Claims (2)

[Scope of utility model registration request] 1. A transport zone for transporting a material to be heat-treated is set inside a heating furnace, and rollers supporting the transport zone from below are arranged in parallel on the lower surface of the transport zone along the traveling direction of the transport zone. A continuous heating furnace characterized in that a large number of support rollers are installed at the left and right ends of adjacent rollers to support the side ends of the conveyor belt from below and loosen the central part. .. 2. The continuous heating furnace according to claim 1, wherein the support receiving member is an auxiliary roller that supports a side end portion of the conveying belt from below.