JP2022151152A - Heating object transport device in heating furnace - Google Patents

Abstract

To provide a heating object transport device in a heating furnace capable of reducing the whole length of the heating furnace.SOLUTION: Since a heating object K on a roller type transport device 10 is coved with a hood 30, while suppressing the temperature reduction of the heating object K, the restriction of a transport distance of the roller type transport device 10 is relaxed to increase the flexibility in the design of the roller type transport device 10 or the like. Further, shaft end parts respectively projected from side walls 30a, 30b of the food 30 of plural transport rollers are rotationally driven by a first rotational driving apparatus, a second rotational driving apparatus, a third rotational driving apparatus, a separation rotation apparatus or the like at positions far from a transport passage H, so that the metal pollution of the heating object K and a heating treatment material in the heating object K caused by metallic fine powder can suitably be suppressed.SELECTED DRAWING: Figure 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating furnace conveying apparatus for conveying an object to be heated that has been heat-treated in a gas atmosphere from the heating furnace.

2. Description of the Related Art A heated object conveying device is known for conveying a heated object such as a sagger heated in a gas atmosphere from a heating furnace to a predetermined position, for example, a heated object reversing device. For example, there is a device for conveying an object to be heated, which includes heating furnace conveying rollers for conveying a powder container from an outlet of a heating furnace in Patent Document 1. In the heating furnace described in Patent Document 1, the object to be heated in a relatively high temperature state from the heating furnace is conveyed to a reversing device that takes out the heat-treated material contained in the object to be heated while being exposed to the atmosphere. A roller transport is provided. The object to be heated that has been reversed by the reversing device is filled with a new heat treatment material, and then transported to the inlet of another adjacent heating furnace.

According to the object-to-be-heated conveying apparatus described in Patent Document 1, the object to be heated that has been turned over while still at a relatively high temperature is put into another heating furnace again. The thermal efficiency is improved, and the preheating section and cooling section of the heating furnace are shortened.

Japanese Patent No. 6552763

However, according to the object-to-be-heated conveying apparatus of Patent Document 1, the object to be heated from the heating furnace in a relatively high temperature state is exposed to the atmosphere up to the reversing device for taking out the heat-treated material accommodated in the object to be heated. be transported in this state. For this reason, while the temperature drop of the object to be heated is large, the transport distance of the roller type transfer device is limited in order to suppress the temperature drop of the object to be heated, and the degree of freedom in designing the roller type transfer device etc. is restricted. Heating equipment was expensive.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and its object is to suppress the temperature drop of the object to be heated and relax the limitation of the conveying distance of the roller conveying device. To provide a device for conveying an object to be heated for a heating furnace, which can increase the degree of freedom in design such as.

As a result of repeated studies to solve the above problems, the inventors of the present invention focused on the fact that it is not always necessary to be in a furnace surrounded by heat insulating material in order to maintain the temperature of the object to be heated. However, when a hood is provided to surround the transfer furnace from the outlet of the heating furnace and the inside of the hood is made into a gas atmosphere, the limit of the transfer distance of the roller type transfer device for suppressing the temperature drop of the heated object is relaxed, and the roller type It was found that the degree of freedom in designing the conveying device and the like was increased, and the cost of the heat equipment was reduced. The present invention has been made based on such findings.

That is, the gist of the first invention is (a) a heated object conveying device for a heating furnace, which feeds the heated object in a high temperature state from the outlet of the heating furnace, and (b) parallel to the conveying direction (c) a roller-type conveying device that conveys the object to be heated sent out from the outlet of the heating furnace using a plurality of conveying rollers forming a conveying path; a hood provided to cover the object to be heated on the roller-type conveying device; That's what it is.

The gist of the second invention is that the roller-type conveying device comprises a roller-type separating conveyor that separates the objects to be heated from each other by conveying the objects to be heated at a speed higher than the speed in the heating furnace. and the rotary drive device includes a separation rotary drive device for rotationally driving shaft ends projecting from side walls of the hood of a plurality of separation conveying rollers provided on the roller type separation conveyor. .

The gist of the third invention is that the hood has a shutter on the downstream side in the conveying direction, and also covers the object to be heated on the roller separating conveyor.

The gist of the fourth invention is a conveyed object aligning device that abuts the objects to be heated conveyed by the roller-type separating conveyor against a stopper and aligns the objects to be heated in a direction orthogonal to the conveying direction. is provided.

The gist of the fifth invention is that the conveyed object aligning device supports the objects to be heated in a horizontal row that have been abutted against the stopper so as to be movable in a direction orthogonal to the conveying direction. The present invention includes a width aligning device that clamps the objects to be heated in a direction orthogonal to the conveying direction and brings the objects to be heated into close contact with each other.

The gist of the sixth invention is that the roller-type conveying device includes a three-row conveyor for conveying the object to be heated in at least three rows, and the three-row conveyor is arranged in (a) in the width direction of the conveying path a plurality of first rotating shafts that are driven to rotate in a penetrating state; (b) a plurality of the first rollers at one of both ends of the central portion of the conveying path; a plurality of second rotating shafts arranged between one rotating shaft; (c) a plurality of first rotating shafts at the other end of both ends of the central portion of the transport path; A plurality of third rotating shafts arranged therebetween, and supporting the object to be heated constituting the other end row of the plurality of end rows arranged on both sides of the center row provided on the third rotating shaft. and (d) a first rotary drive device for synchronizing and driving the shaft ends of the plurality of first rotary shafts protruding from the side wall of the hood. (e) a second rotary drive device for synchronizing and driving the shaft ends of the plurality of second rotary shafts protruding from the side wall of the hood; and (f) the plurality of third rotary shafts. (g) a third rotary driving device for synchronizing and driving the shaft end portions of the shaft protruding from the side wall of the hood to rotate; a control device for controlling the first rotary drive device, the second rotary drive device, and the third rotary drive device such that the positional difference in the conveying direction between the objects to be heated adjacent in the direction orthogonal to the direction becomes small; ,

The gist of the seventh invention is that: (a) the first rotating shaft of the first conveying roller has a plurality of rollers having a diameter larger than that of the first rotating shaft and supporting the object to be heated; (b) the second rotating shaft of the second conveying roller has a larger diameter than the second rotating shaft and supports the object to be heated; (c) the third rotating shaft of the third conveying roller has a larger diameter than the third rotating shaft and the heated a plurality of third support wheels for supporting objects are provided apart from each other; The reason is that the diameter is larger than that of the three support wheels.

The gist of the eighth aspect of the invention is that the object to be heated is a box-shaped sagger made of a ceramic material for containing the material to be heat-treated, and the first support ring, the second support ring and the third support ring are provided. The rings are both made of ceramic material.

According to the object-to-be-heated conveying device for a heating furnace of the first invention, the object to be heated sent out from the outlet of the heating furnace is conveyed using a plurality of conveying rollers forming a conveying path in parallel in the conveying direction. a roller-type conveying device; a hood airtightly provided following the furnace body of the heating furnace and covering the object to be heated on the roller-type conveying device; a rotary drive device that drives the shaft end to rotate. As a result, since the object to be heated on the roller type conveying device is covered with the hood, the temperature drop of the object to be heated is suppressed and the limitation on the conveying distance of the roller type conveying device is eased. The degree of freedom in designing devices and the like can be increased. In addition, since the shaft ends of the plurality of conveying rollers protruding from the side wall of the hood are rotationally driven by the rotary drive device at a position away from the conveying path, the object to be heated and the object to be heated made of metallic fine powder can be heated. Metal contamination of the heat-treated material inside is preferably suppressed.

According to the object-to-be-heated conveying device for a heating furnace of the second invention, the roller-type conveying device separates the objects to be heated from each other by conveying the object to be heated at a speed higher than that in the heating furnace. Since the roller-type separating conveyor is included, the objects to be heated can be narrowed in the conveying direction in the heating furnace, and the overall length of the heating furnace can be further shortened. Further, the rotary drive device includes a separation rotary drive device that rotates shaft end portions of a plurality of separation conveying rollers provided on the roller type separation conveyor and protruding from the side wall of the hood. As a result, the axial end portions of the plurality of conveying rollers protruding from the side wall of the hood are rotationally driven by the separation rotation driving device at a position away from the conveying path also on the separation conveyor. As a result, metal contamination of the object to be heated and the heat-treated material in the object to be heated by the metallic fine powder is preferably suppressed.

According to the object-to-be-heated conveying apparatus of the heating furnace of the third invention, the hood has a shutter on the downstream side in the conveying direction, and also covers the object-to-be-heated on the roller separating conveyor. Thereby, the temperature drop of the object to be heated is further suppressed.

According to the object-to-be-heated conveying device for a heating furnace of the fourth invention, the object-to-be-heated conveyed by the roller-type separating conveyor hits the stopper and is aligned in the direction orthogonal to the conveying direction of the object-to-be-heated. A transported object aligning device is provided to cause the transported object to align. As a result, the objects to be heated that have been conveyed are aligned in the direction orthogonal to the conveying direction.

According to the object-to-be-heated conveying device for a heating furnace according to the fifth aspect of the invention, the object-aligning device can move the object-to-be-heated in a horizontal row that abuts against the stopper in a direction perpendicular to the conveying direction. a width aligning device that sandwiches the objects to be heated in a direction orthogonal to the conveying direction while supporting the objects in a state of being supported on the surface of the object to bring the objects to be heated into close contact with each other. As a result, the objects to be heated separated in a horizontal row are brought into close contact with each other in the direction orthogonal to the conveying direction. If the substitution chamber is provided following the hood, the substitution chamber can be set small.

According to the object-to-be-heated conveying device for a heating furnace of the sixth aspect of the invention, the roller-type conveying device includes a three-row conveyor for conveying the object to be heated in at least three rows, and the three-row conveyor is arranged along the conveying path. A plurality of first rotating shafts that are driven to rotate while penetrating in the width direction; A first conveying roller having a first support wheel that supports the object to be heated and forming a central row; a plurality of second rotating shafts arranged between one rotating shaft; A second conveying roller having a second support ring for supporting the object to be heated, and a second conveying roller disposed between the plurality of first rotating shafts at the other end of both side ends of the central portion of the conveying path. and a plurality of third rotating shafts provided on the third rotating shaft and forming the other end row of the end rows lined up on both sides of the center row for supporting the object to be heated. a third conveying roller having a supporting wheel; a first rotary driving device for synchronizing and driving shaft end portions of the plurality of first rotating shafts protruding from side walls of the hood; a second rotation driving device for synchronizing and driving the shaft ends of the second rotating shaft protruding from the side wall of the hood, and the shaft ends of the plurality of third rotating shafts protruding from the side wall of the hood, respectively. and a third rotary drive device that rotates and drives the objects to be heated adjacent in a direction orthogonal to the conveying direction among the objects to be heated conveyed in a double row state on the conveying path. a control device that controls the first rotary drive device, the second rotary drive device, and the third rotary drive device such that positional differences in directions are reduced. As a result, the ends of the first, second, and third rotating shafts protruding from the conveying path, that is, from the hood, are driven. The second rotary shaft and the third rotary shaft are driven to rotate by the first rotary drive device, the second rotary drive device and the third rotary drive device, respectively, and the contamination of the heat treatment material conveyed together with the object to be heated by metallic fine powder is prevented. preferably suppressed. In addition, even if the object to be heated meanders in the direction perpendicular to the conveying direction due to the bending of the conveying roller in the upstream side of the conveying direction, for example, in the heating furnace, the object conveyed on the first conveying roller is controlled by the control device. Since the positional difference in the conveying direction between the object to be heated, the object to be heated conveyed on the second conveying roller, and the object to be heated conveyed on the third conveying roller is reduced, they are adjacent in the direction orthogonal to the conveying direction. The objects to be heated are aligned in the lateral direction.

According to the object-to-be-heated conveying device for a heating furnace of the seventh invention, the first rotating shaft of the first conveying roller has a diameter larger than that of the first rotating shaft and supports the object to be heated. A plurality of first support wheels are provided apart from each other, and the second rotating shaft of the second conveying roller has a diameter larger than that of the second rotating shaft and supports the object to be heated. A plurality of second support rings are provided apart from each other, and the third rotating shaft of the third conveying roller has a diameter larger than that of the third rotating shaft and supports the object to be heated. and a plurality of third support rings are provided apart from each other, and the plurality of first support rings are larger than the plurality of second support rings and the plurality of third support rings. diameter. As a result, the heated object conveyed by the second conveying roller and the third conveying roller tends to separate from the heated object conveyed by the first conveying roller, and the heated object conveyed by the first conveying roller tends to separate. Interference between the object and the object to be heated conveyed by the second conveying roller and the third conveying roller is avoided.

According to the object-to-be-heated conveying device for a heating furnace of the eighth aspect of the invention, the object to be heated is a box-shaped sagger made of a ceramic material for containing the material to be heat-treated, and the first support ring and the second support Both the ring and said third support ring are made of ceramic material. As a result, the generation of fine metal powder is suitably suppressed.

1 is a plan view showing a state in which a roller-type conveying device according to one embodiment of the present invention is attached to a heating furnace; FIG. FIG. 2 is a plan view showing the hood covering the roller-type conveying device of FIG. 1 with the ceiling wall removed; FIG. 3 is a sectional view taken along line III-III in FIG. 2; FIG. 3 is a sectional view taken along line IV-IV of FIG. 2; FIG. 3 is a cross-sectional view taken along line VV of FIG. 2; It is the side view seen from the left-hand side toward the conveyance direction of FIG.

An embodiment of the present invention will now be described in detail with reference to the drawings. In the following examples, the drawings are intended to explain the essential parts related to the invention, and the dimensions, shapes, etc. are not necessarily drawn accurately.

FIG. 1 is a plan view showing a state in which an object-to-be-heated conveying device 8 according to an embodiment of the present invention is attached to a heating furnace 12. FIG. The object-to-be-heated conveying device 8 includes a roller-type conveying device 10 and a transfer conveyor 36 . The heating furnace 12 is a so-called roller hearth kiln type heat treatment furnace. The heating furnace 12 has a tunnel-shaped furnace body 14 formed of a heat insulating material such as a heat-resistant brick or a ceramic board and a casing covering the heat insulating material, and a plurality of in-furnace conveying rollers 16 for conveying the object K to be conveyed. , a heater (not shown) provided in the furnace body 14 so as to heat the object K to be conveyed, and a rotation drive (not shown) that synchronously rotates a plurality of conveying rollers 16 in the furnace body 16 at a constant rotational speed. and a device.

An object to be conveyed K, which is an object to be heated, is made of a ceramic material such as alumina, SiC, mullite, cordierite, spinel cordierite, magnesia, or zirconia. It is a type of sagger and the like. In this example, a box-shaped sagger is shown in the figure. The sagger accommodates a heat-treated material such as a dielectric, a chip capacitor in which a dielectric and an electrode are laminated, and an electrode material for a lithium ion battery.

The plurality of in-furnace conveying rollers 16 are arranged horizontally in the furnace body 14 and in the longitudinal direction of the furnace body 14, that is, in the conveying direction, in order to continuously heat-treat the object K to be conveyed in the atmosphere or in an inert gas, for example. They are provided so as to penetrate at regular center intervals in a direction orthogonal to A1.

In FIG. 1, the outlet side end of the furnace body 14 and one in-furnace transfer roller 16 arranged at the outlet side end are shown. The double-row conveyed objects K heat-treated in the heating furnace 12 are continuously conveyed at a constant speed from the exit side end of the furnace body 14 to the roller-type conveying device 10 arranged at the exit of the furnace body 14. It's like

The roller-type transport device 10 includes a hood 30 and a replacement chamber 32 . Further, the roller-type conveying device 10 includes a three-row conveyor 20, a separating conveyor 22, a dispensing conveyor 23, a conveyed object aligning device 28, and a sending conveyor 34 in the longitudinal direction of the furnace body 14 in this order. The hood 30 includes a three-row conveyor 20 and a separation conveyor 22 functioning as a furnace speed conveyor in order to maintain a gas atmosphere of the object K, such as an air atmosphere, a nitrogen atmosphere, a reducing atmosphere, or the like, or to keep the object K warm. , the dispensing conveyor 23 and the article alignment device 28 are airtightly covered. The replacement chamber 32 is provided continuously with the hood 30 in the transport direction A1 of the object K to be transported. FIG. 2 is a plan view showing the hood 30 covering the roller-type conveying device 10 with the ceiling wall 30d removed.

The three-row conveyor 20 conveys the double-row objects K in at least three rows (six rows in this embodiment) in the conveying direction A1 at basically the same speed as in the furnace body 14 (furnace speed). transport. The separating conveyor 22 conveys the objects K at the same speed as the three-row conveyor 20 until the objects K reach a predetermined position, but once the objects K reach the three-row conveyor 20, the separating conveyor 22 conveys a plurality of objects K at a higher speed than the three-row conveyor 20.例文帳に追加, separates a plurality of transferred objects K in a horizontal row. The delivery conveyor 23 conveys the object K separated by the separation conveyor 22 at a higher speed than the furnace speed and feeds it into the replacement chamber 32 .

Prior to being fed into the replacement chamber 32, the transported object aligning device 28 abuts the transported objects K separated in a horizontal line against the stopper 24 and clamps them in the direction orthogonal to the transport direction A1 to align the transported objects. The objects K are arranged in a horizontal row in a direction orthogonal to the conveying direction A1 of the objects K by using the width adjusting device 26 that brings the objects K into close contact with each other. The delivery conveyor 34 delivers the objects K aligned horizontally in the replacement chamber 32 from the replacement chamber 32 at a higher speed than the furnace speed.

The transfer conveyor 36 receives the horizontal row of objects K from the delivery conveyor 34 and transfers them in a row (single row) in a direction perpendicular to the conveying direction A1 to a reversing device (not shown) or the like.

As shown in FIGS. 3, 4, 5, and 6, the three-row conveyor 20, the separation conveyor 22, the discharge conveyor 23, the transported object alignment device 28, the hood 30, the replacement chamber 32, and the delivery conveyor 34 are: Each is supported by a machine frame (frame) 38 . As shown in FIGS. 2 and 3, the hood 30 has a tunnel shape with a pair of side walls 30a and 30b, a bottom wall 30c, and a ceiling wall 30d, and is airtightly connected to the outlet of the furnace body . As shown in FIGS. 1 and 6, the replacement chamber 32 has a tunnel shape with a pair of side walls 32a and 32b, a bottom wall 32c and a ceiling wall 32d. The replacement chamber 32 further includes an entrance shutter 32e that opens and closes the opening on the furnace body 14 side, and an exit shutter 32f that opens and closes the opening on the side opposite to the furnace body 14. As shown in FIG. A transport path H for the transported object K is formed between the pair of side walls 30a and 30b and between the pair of side walls 32a and 32b.

As shown in FIGS. 2 and 6, the three-row conveyor 20 includes a pair of upstream furnace speed conveying rollers 18a and downstream conveying rollers 18b that rotate at the same rotational speed as the furnace interior conveying rollers 16, and a plurality of second conveyor rollers 18a and 18b. A first rotary drive device 60 that drives the first transport roller 44 and the first transport roller 44 to rotate; a second rotary drive device 62 that drives the second transport roller 52 and the second transport roller 52 to rotate; A roller 58 and a third rotary drive device 64 for rotating the third conveying roller 58 are provided between the upstream furnace speed conveying roller 18a and the downstream conveying roller 18b. The upstream furnace speed conveying rollers 18a and the downstream conveying rollers 18b, like the in-furnace conveying rollers 16, are composed of a rotating shaft and a plurality of (12 in this embodiment) supporting rings provided on the rotating shaft. However, the supporting wheel of the downstream conveying roller 18b is a freely rotating wheel (free roller) that can rotate relative to the supporting shaft.

As shown in FIGS. 2 and 4, the first conveying rollers 44 include a plurality of (eight in this embodiment) first rotating shafts 40 that are driven to rotate while penetrating the conveying path H in the width direction, A plurality (six in the present embodiment) of the first rotating shaft 40 are provided in the central portion in the longitudinal direction to support the transported objects K constituting the center row of the transported objects K in three or more rows. ). The first support ring 42 has a larger diameter than the first rotating shaft 40, is made of a ceramic material such as alumina, SiC, mullite, cordierite, spinel cordierite, magnesia, zirconia, and has an annular shape. .

A pair of side plates 46a and 46b are fixed to the outside of the pair of side walls 30a and 30b of the hood 30 via spacers 45 in parallel with the side walls 30a and 30b, respectively. Both shaft ends 40a and 40b of the first rotating shaft 40 are rotatably supported by both side walls 30a and 30b via sealed bearings SB. The portion 40a is also rotatably supported by one side plate 46a.

The first rotating shaft 40 has an overall length longer than that of the side walls 30a and 30b, and is rotatably supported on both sides. The pair of side walls 30a and 30b and the pair of side plates 46a and 46b function as roller support walls that rotatably support the transport rollers such as the first transport roller 44, the second transport roller 52 and the third transport roller 58. there is

As shown in FIGS. 2 and 3, the second conveying roller 52 is arranged at one of the ends on both sides of the central portion of the conveying path H, which is the right side in the conveying direction A1 in this embodiment. A plurality of (seven in this embodiment) second rotation shafts 48 arranged between the plurality of first rotation shafts 40 and a plurality of (eight in this embodiment) second rotation shafts 48 are provided. In this embodiment, of the two end rows lined up on both sides of the two central rows of conveyed objects K, the conveyed objects K constituting one end row on the right side in the conveying direction A1 are supported. It has a second support wheel 50 that The second support ring 50 has a diameter larger than that of the second rotating shaft 48 and is annularly formed of a ceramic material such as alumina, SiC, mullite, cordierite, spinel cordierite, magnesia, or zirconia.

One shaft end 48a of the second rotary shaft 48 is rotatably supported by the side wall 30a and the side plate 46a via a bearing SB with a seal and a bearing (not shown), and the other shaft end 48b of the second rotary shaft 48 is Free end. The second rotating shaft 48 has an overall length shorter than half that of the first rotating shaft 40, and is rotatably supported in a cantilever manner by one side wall 30a and side plate 46a.

As shown in FIGS. 2 and 3, the third conveying roller 58 is arranged at the other end, which is on the left side in the conveying direction A1 in this embodiment, of both ends of the central portion of the conveying path H. A plurality of (seven in this embodiment) third rotating shafts 54 arranged between the plurality of first rotating shafts 40 and concentrically with the second rotating shaft 48, and a plurality of (seven in this embodiment) third rotating shafts 54 ( 8 in this embodiment) are provided to support the conveyed object K constituting the other end row, which is the left side in the conveying direction A1 in this embodiment, of the two end rows lined up on both sides of the central row. It has a third support ring 56 that The third support ring 56 has a larger diameter than the third rotating shaft 54, and is made of a ceramic material such as alumina, SiC, mullite, cordierite, spinel cordierite, magnesia, and zirconia, and has an annular shape. .

One shaft end portion 54a of the third rotating shaft 54 is a free end, and the other shaft end portion 54b of the third rotating shaft 54 is connected to the other side wall 30b and the side plate 46b via a sealed bearing SB and a bearing (not shown). rotatably supported. The third rotating shaft 54 has an overall length shorter than half that of the first rotating shaft 40, and is rotatably supported in a cantilever manner by the other side wall 30b and the side plate 46b.

The first support ring 42 of the first rotation shaft 40, the second support ring 50 of the second rotation shaft 48, and the third support ring 56 of the third rotation shaft 54 are made of a ceramic material like the object K to be conveyed. Therefore, although a small amount of ceramic powder is generated by contact with the object K to be conveyed, no metal powder is generated. , metal contamination of heat-treated materials such as electrode materials for lithium-ion batteries is suppressed.

As shown in FIGS. 2 and 6, the first rotary drive device 60 rotates shaft ends 40a protruding from one end of the conveying path H of the plurality of first rotary shafts 40, that is, from one side wall 30a. As a result, the plurality of first conveying rollers 44 are synchronously driven to rotate. The first rotary drive device 60 includes a first reducer-equipped electric motor 60b, sprockets 60c having the same diameter and fitted to the shaft ends 40a, a synchronous chain 60d wound around the sprockets 60c, a shaft A pair of sprockets 60e respectively fitted to one of the end portions 40a and the output shaft of the first reduction gear motor 60b, and a drive chain 60f wound around the pair of sprockets 60e. The rotating shaft 40 is synchronously rotated.

As shown in FIGS. 2 and 6, the second rotary drive device 62 rotates shaft ends 48a protruding from one end of the conveying path H of the plurality of second rotary shafts 48, that is, from one side wall 30a. As a result, the plurality of second conveying rollers 52 are synchronously driven to rotate. The second rotary drive device 62 includes a motor 62b with a second speed reducer, sprockets 62c of the same diameter fitted to the shaft ends 48a, and a synchronous chain 62d wound around the sprockets 62c. ing. Further, the second rotary drive device 62 is wound around a pair of sprockets 62e fitted to the shaft ends of the downstream conveying roller 18b and the output shaft of the second reduction gear motor 62b. a pair of sprockets 62g respectively fitted to one of the shaft end portion of the downstream conveying roller 18b and the shaft end portion 48a; and the drive chain 62h wound around the sprockets 62g. The second rotary shaft 48 of the book is synchronously rotated.

As shown in FIGS. 2 and 6, the third rotary drive device 64 rotates the shaft ends 54b protruding from the other end of the conveying path H of the plurality of third rotary shafts 54, that is, from the other side wall 30b. As a result, the third conveying rollers 58 are synchronously driven to rotate. As shown in FIG. 6, the third rotary drive device 64 includes a third electric motor 64b with a reduction gear, sprockets 64c having the same diameter as each other and fitted to the shaft end 54b, and windings around the sprockets 64c. a pair of sprockets 64e respectively fitted to one of the shaft ends 54b and the output shaft of the third reduction gear motor 64b; and a drive chain 64f wound around the pair of sprockets 64e. and synchronously rotationally drives the plurality of third rotating shafts 54 .

As shown in FIGS. 3 and 4, the first rotary drive device 60, the second rotary drive device 62 and the third rotary drive device 64 use chains and sprockets, which cause metal contamination of the material to be heated. It may generate a small amount of metal powder (particles). However, in this embodiment, in order to suppress metal contamination of the material to be heated, the first rotary drive device 60 is provided with one end of the conveying path H of the first rotary shaft 40, that is, one shaft end protruding from one side wall 30a. The second rotary drive device 62 rotates shaft end portions 48a protruding from one end of the conveying path H of the plurality of second rotary shafts 48, that is, from one side wall 30a. The third rotary drive device 64 rotates the shaft ends 54b projecting from the other end of the conveying path H of the plurality of third rotary shafts 54, that is, the other side wall 30b. Also, the first rotary drive device 60, the second rotary drive device 62 and the third rotary drive device 64 are positioned away from the transport path H and the side wall 30a or 30b. Furthermore, the first rotary drive 60 , the second rotary drive 62 and the third rotary drive 64 are positioned away from within the hot hood 30 . For this reason, durability is obtained, and the use of a cooling device becomes unnecessary.

As shown in FIG. 4, the first rotating shaft 40 is rotatably supported by both side walls 30a and 30b. 3) are rotatably supported by first roller-type support devices 65 . Further, as shown in FIG. 3, a plurality of shaft ends (free ends) 48b (in this embodiment) of the second rotary shaft 48 rotatably supported in a cantilever manner by one side wall 30a and the side plate 46a are provided. It is rotatably supported by second roller type support devices 66 (two in the example). Further, as shown in FIG. 3, the shaft end (free end) 54a of the third rotating shaft 54, which is rotatably supported in a cantilever manner by the other side wall 30b and the side plate 46b, has a plurality of shaft ends (free ends) 54a. Each of them is rotatably supported by third roller type support devices 67 (two in this embodiment). As a result, the bending of the central portion of the first rotating shaft 40, the bending of the free end portion 48b of the second rotating shaft 48, and the bending of the free end portion 54a of the third rotating shaft 54 are suppressed. The displacement of K in the conveying direction A1 is suppressed.

As shown in FIGS. 3 and 4, the first roller-type support device 65 includes a base 65a, a pair of rollers 65b erected from the base 65a and horizontally separated by a predetermined distance, and a pair of rollers 65b. and a roller support bracket 65c that rotatably supports the roller support bracket 65c in a state in which the rotation center lines are parallel to each other, and rotatably supports the first rotating shaft 40 in contact with the pair of rollers 65b. Similarly, the second roller type support device 66 has a base 66a, a pair of rollers 66b, and a roller support bracket 66c to rotatably support the second rotating shaft 48, and a third roller type support device. 67 has a base 67a, a pair of rollers 67b, and a roller support bracket 67c, and supports the third rotating shaft 54 rotatably.

As shown in FIGS. 1 and 6, the control device 68 is, for example, an electronic control device, and basically controls six rows of conveyed objects K conveyed in double rows on the conveying path H by: The electric motor with first reduction gear 60b, the electric motor with second reduction gear 62b, and the electric motor with third reduction gear 64b are controlled so as to convey at the same speed as the conveyance speed in the furnace body . At the same time, the controller 68 controls the transported object K adjacent in the direction orthogonal to the transport direction A1 among the six rows of transported objects K transported in a double row on the transport path H, that is, the three-row conveyor 20. Two rows of objects K conveyed by the first conveying rollers 44, two rows of objects K conveyed by the second conveying rollers 52 of the three-row conveyor 20, and the third conveying rollers of the three-row conveyor 20 The first conveying roller 44 is driven so that the two rows of conveyed objects K conveyed by 58 are synchronized with each other in a direction orthogonal to the conveying direction A1 so that the mutual positional deviation in the conveying direction A1 is reduced. The rotation speeds of the first reduction gear motor 60b, the second reduction gear motor 62b that rotates the second conveying roller 52, and the third reduction gear motor 64b that drives the third conveying roller 58 are corrected and controlled.

The control device 68 controls, for example, the positions of the objects K conveyed in two rows by the first conveying rollers 44 detected by three sensors (not shown) provided at the starting end of the three-row conveyor 20, and the positions of the objects K conveyed in three rows. Conveyance direction between the positions of the two rows of conveyed objects K conveyed by the second conveying rollers 52 of the conveyor 20 and the positions of the two rows of conveyed objects K conveyed by the third conveying rollers 58 of the three rows conveyor 20 Correction control is performed so that the mutual deviation of A1 is reduced.

As shown in FIGS. 2 and 6 , the separating conveyor 22 is provided following the 3-row conveyor 20 . The separation conveyor 22 has a plurality of (four in this embodiment) separation conveying rollers 70 and a separation rotary drive device 72 configured in the same manner as the first rotary drive device 60 . A plurality of separating and conveying rollers 70 are composed of a rotating shaft 70a rotatably supported by both side walls 30a and 30b via sealed bearings SB, similar to the upstream furnace speed conveying roller 18a, and a rotating shaft 70a. 70a and a plurality of (22 in this embodiment) support rings 70b fixed on the support rings 70a.

The plurality of separating and conveying rollers 70 are controlled by the control device 68 and synchronously driven to rotate by the separating and rotating drive device 72, thereby conveying the objects conveyed in six columns on the three-row conveyor 20. The article K is conveyed at the furnace speed until it reaches a predetermined position. Separate each.

As shown in FIGS. 2 and 5, the payout conveyor 23 is provided following the separation conveyor 22 . The pay-out conveyor 23 rotates a plurality of pay-out conveying rollers 74 (six in this embodiment) and the pay-out conveying rollers 74 so as to convey the separated conveyed objects K in a horizontal row at a speed higher than the furnace speed. It has a payout rotary drive device 76 to drive. A plurality of feed-out conveying rollers 74 are composed of a rotating shaft 74a rotatably supported by both side walls 30a and 30b via sealed bearings SB in the same manner as the upstream furnace speed conveying roller 18a, and a rotating shaft 74a. and a plurality of (22 in the present embodiment) support rings 74b fixed to the support ring 74b. Under the control of the control device 68, the delivery conveyor 23 replaces the objects K aligned in a horizontal row by the object aligning device 28 in the process of being transported at a speed higher than the furnace speed. Send to room 32 .

As shown in FIGS. 2 and 5, the transported object aligning device 28 has a stopper 24 and a width adjusting device 26 . The stopper 24 is provided so as to be selectively movable between upper and lower positions by a vertical actuator 78 such as an electric cylinder or a pneumatic cylinder, and prevents the object K from moving in the conveying direction A1 at the upper position. The width adjusting device 26 includes a transported object lifting device 84 , a pair of horizontal cylinders 86 fixed to the side walls 30 a and 30 b , and a pair of clamps 88 . The transported object lifting device 84 is provided so as to be selectively movable between upper and lower positions by a vertical actuator 80 such as an electric cylinder or a pneumatic cylinder. It has support rollers 82 . The pair of clamping tools 88 are horizontally driven by the pair of horizontal cylinders 86 to clamp the transported object K supported by the transported object lifting device 84 in a direction orthogonal to the transport direction A1. Under the control of the control device 68, the transported object aligning device 28 aligns the laterally aligned transported objects K, which have hit against the stopper 24 and are lifted from the transport path H, in a horizontal row in close contact with each other in the horizontal direction. align to

As shown in FIG. 2, the delivery conveyor 34 is provided following the payout conveyor 23 . The delivery conveyor 34 rotates a plurality of (eight in this embodiment) delivery transport rollers 94 and the delivery transport rollers 94 so as to transport the separated transported object K in a horizontal row at a speed higher than the furnace speed. It has a delivery rotary drive device (not shown) for driving. A plurality of feed-out conveying rollers 94 are rotatably supported on both sides by both side walls 32a and 32b and a support wall (not shown) through bearings SB with seals in the same manner as the upstream furnace speed conveying rollers 18a. 90 and a plurality of (22 in this embodiment) support rings 92 fixed on the rotating shaft 90 .

The delivery conveyor 34 is controlled by the control device 68 to transport the objects K aligned in a horizontal row in the transported object aligning device 28 in the process of being transported at a speed higher than the furnace speed. The same atmospheric gas as that in the furnace is replaced with the air from the replacement chamber 32 and sent out onto the transfer conveyor 36 .

The transfer conveyor 36 is a chain conveyor having conveyor rails 36a arranged in a direction orthogonal to the conveying direction A1, conveyor chains 36b supported by the conveyor rails 36a, and a chain driving device (not shown). Under the control of the control device 68, the transfer conveyor 36 moves the objects K arranged in a horizontal row by the delivery conveyor 34 in a direction perpendicular to the conveying direction A1. Transfer in a single row to a reversing device that does not work. In the reversing device, the objects K conveyed in a line by the transfer conveyor 36 can be sequentially reversed one by one.

In the three-row conveyor of the roller-type conveying device 10 configured as described above, the objects to be conveyed K are arranged in series from the outlet of the furnace body 14 in a plurality of rows (in this embodiment, two rows each, totaling six rows). are sequentially carried out at a predetermined furnace speed, the first two rows of the objects K to be conveyed are conveyed by the first conveying rollers 44 of the three-row conveyor 20, and the two right-hand objects K in the conveying direction A1 are conveyed. The conveyed objects K in the second row are conveyed by the second conveying rollers 52 of the three-row conveyor 20, and the conveyed objects K in the right two rows in the conveying direction A1 are conveyed by the three-row conveyor. It is conveyed by twenty third conveying rollers 58 .

The in-furnace conveying rollers 16 of the heating furnace 12 tend to bend so that the central portion in the longitudinal direction is curved downward, particularly in the high-temperature heating region. In the horizontal direction perpendicular to the direction A1, the central portion tends to be positioned in the conveying direction A1 more than the both ends. If this tendency is significant, the alignment capability of the transported object aligning device 28 may be exceeded, and it may become difficult to accommodate the transported objects in the replacement chamber 32 .

On the other hand, the control device 68 controls two rows of objects K conveyed by the first conveying rollers 44 detected by three sensors (not shown) provided upstream of the three-row conveyor 20, Two rows of objects K conveyed by the second conveying rollers 52 of the row conveyor 20 and two rows of objects K conveyed by the third conveying rollers 58 of the three-row conveyor 20 are mutually in the conveying direction A1. control so that the deviation of As a result, at the stage of the three-row conveyor 20, the mutual displacement of the conveyed objects K in the conveying direction A1 is reduced.

In addition, at the stage of the three-row conveyor 20, the diameter of the first supporting ring 42 of the first conveying roller 44 is the same as the diameter of the second supporting ring 50 of the second conveying roller 52 and the third supporting ring 56 of the third conveying roller 58. is set larger than the diameter of Therefore, on the transport path H, the object K transported by the second transport rollers 52 and the third transport rollers 58 tends to separate from the object K transported by the first transport rollers 44 . , the interference between the object K conveyed by the first conveying roller 44 and the object K conveyed by the second conveying roller 52 and the third conveying roller 58 is avoided.

The horizontal row of objects K conveyed basically at the furnace speed by the three-row conveyor 20 are relatively close in the conveying direction A1, but are conveyed by the separation conveyor 22 following the three-row conveyor 20. Each time an object K arrives, it is conveyed at a speed higher than the furnace speed, and separated in the conveying direction A1, thereby increasing the mutual interval in the conveying direction A1. In the process of being transported at a speed higher than the furnace speed, the transported objects K with the large mutual spacing in the transport direction A1 are laterally moved by the stopper 24 of the transported object aligning device 28 and the width adjusting device 26. They are aligned in a horizontal row with high precision in the conveying direction while being in close contact with each other. The objects K to be conveyed which are accurately aligned horizontally are sent into the replacement chamber 32 by the payout conveyor 23 . Then, when the interior of the replacement chamber 32 is replaced with the atmosphere, the conveyed objects K in a row in the replacement chamber 32 are delivered to the end of the transfer conveyor 36 by the delivery conveyor 34 .

Assuming that the articles to be transferred are arranged in a horizontal row by the article aligning device 28 and accommodated in the replacement chamber 32, it is necessary for the separation conveyor 22 to increase the distance between the articles K to be transferred in the conveying direction A1. Therefore, the presence of the separating conveyor 22 makes it possible to reduce the interval in the returning direction of the objects K in the heating furnace 12 , thereby contributing to shortening the overall length of the heating furnace 12 .

The volume of the replacement chamber 32 is set to be as small as possible within a range in which the objects K to be transported arranged in a horizontal row can be accommodated, in order to improve the consumption efficiency of the gas forming the gas atmosphere. By using the stopper 24 and the width adjusting device 26 of the transported object aligning device 28 described above, the transported objects can be accurately aligned in the transport direction while being in close contact with each other in the lateral direction. contributes to making it smaller.

The hood 30 has sealed bearings SB for receiving the first rotating shaft 40, the second rotating shaft 48, the third rotating shaft 54, and the rotating shaft 70a passing through the side walls 30a and 30b. 14 and the inlet of the displacement chamber 32 are airtightly connected. Therefore, the hood 30 has the function of keeping the object K carried out from the heating furnace 12 under the same gas atmosphere as in the heating furnace 12 until it enters the replacement chamber 32 . In this way, by creating the same gas atmosphere in the hood 30 as in the heating furnace 12, it is possible to increase the heating capacity of the heating furnace 12 under the gas atmosphere for the heat treatment material accommodated in the object K to be transferred. .

Further, the hood 30 has a function of maintaining the temperature of the transferred object K carried out from the heating furnace 12 . For this reason, the material to be heat-treated is taken out while the object to be transferred K remains at a relatively high temperature, and the object to be transferred K in the high-temperature state is filled with a new heat-treated material and carried into the entrance of the heating furnace 12. Therefore, the object K, which has a large specific heat and heat capacity, is not cooled to a low temperature. Thermal efficiency is enhanced. The inlet shutter 32e of the replacement chamber 32 corresponds to the downstream shutter of the hood 30 in the transport direction A1.

According to the to-be-heated object conveying device 8 of the heating furnace 12 of the present embodiment, the to-be-heated object conveying device 8 of the heating furnace 12 sends out the to-be-heated object K in a high-heat state from the outlet of the heating furnace 12, A plurality of conveying rollers (first conveying roller 44, second conveying roller 52, third conveying roller 58, separation conveying roller 70, etc.) forming a conveying path H are arranged in parallel at predetermined center intervals in the conveying direction A1. A roller type conveying device 10 for conveying an object to be conveyed (an object to be heated) K sent out from the outlet of the heating furnace 12 using The hood 30 covering the conveyed object K and the shaft end portions (shaft end portion 40a, shaft end portion 48a, shaft end portion 54b, etc.) protruding from the side walls 30a and 30b of the hoods 30 of the plurality of conveying rollers are mutually connected. rotation drive devices (first rotation drive device 60, second rotation drive device 62, third rotation drive device 64, separation rotation drive device 72, etc.) that are synchronously driven to rotate. As a result, since the object K on the roller conveying device 10 is covered with the hood 30, the temperature drop of the object K is suppressed and the restriction on the conveying distance of the roller conveying device 10 is relaxed. Therefore, the degree of freedom in designing the roller-type conveying device 10 and the like can be increased. In addition, since the shaft ends of the plurality of conveying rollers protruding from the side walls 30a and 30b of the hood 30 are driven to rotate in synchronization with each other by the rotary drive device at a position away from the conveying path H, the metallic metal contamination of the object to be transferred K and the heat-treated material in the object to be transferred K due to the fine powder of the transfer object K is preferably suppressed.

According to the object-to-be-heated conveying device 8 of the heating furnace 12 of the present embodiment, the roller-type conveying device 10 conveys the object K to be conveyed at a higher speed than the speed in the heating furnace 12, thereby moving the object K to each other. Since the separation conveyor (roller type separation conveyor) 22 is included, the distance between the objects to be conveyed K can be reduced in the conveying direction A1 in the heating furnace 12, and the overall length of the heating furnace 12 can be further shortened. can. A separation rotation driving device 72 is provided for synchronizing and rotating the shaft ends of the plurality of separation conveying rollers 70 provided on the separation conveyor 22, which protrude from the side walls 30a and 30b of the hood 30, respectively. As a result, the shaft ends of the plurality of separating and conveying rollers 70 protruding from the side walls 30 a and 30 b of the hood 30 are moved by the separating and rotating drive device 72 at positions away from the conveying path H also on the separating conveyor 22 . Since they are rotationally driven in synchronization with each other, metal contamination of the object to be transferred K and the material to be heat-treated in the object to be transferred K by metallic fine powder is preferably suppressed.

According to the object-to-be-heated conveying device 8 of the heating furnace 12 of the present embodiment, the hood 30 has a shutter (entrance shutter 32e) on the downstream side in the conveying direction A1, and the object K on the separating conveyor 22 is also conveyed. It covers. As a result, the object K to be conveyed is covered with the hood 30 also on the separating conveyor 22, so that the temperature drop of the object K to be conveyed is further suppressed.

According to the object-to-be-heated conveying device 8 of the heating furnace 12 of the present embodiment, the object to be conveyed K conveyed by the separation conveyor 22 hits the stopper 24 to align the position of the object K in the conveying direction. An alignment device 28 is provided. As a result, the transferred objects K are aligned in the direction orthogonal to the transfer direction A1 before being accommodated in the replacement chamber 32 .

According to the object-to-be-heated conveying device 8 of the heating furnace 12 of the present embodiment, the object-to-be-transferred aligning device 28 moves the object-to-be-conveyed K in a horizontal row that abut against the stopper 24 in a direction orthogonal to the conveying direction A1. It also includes a width adjusting device 26 that sandwiches the objects K to be conveyed K in a direction orthogonal to the conveying direction A1 in a state where they are supported as possible, and brings them into close contact with each other. As a result, the transported objects K separated in a horizontal row are brought into close contact with each other in the direction orthogonal to the transport direction A1. When the replacement chamber 32 is provided following the hood 30, the size of the replacement chamber 32 can be set small, and gas consumption can be reduced.

According to the object-to-be-heated conveying device 8 of the heating furnace 12 of the present embodiment, the roller-type conveying device 10 includes the three-row conveyor 20 that conveys the objects K in at least three rows. A plurality of first rotating shafts 40 rotatably driven while penetrating in the width direction of the path H, and a plurality of rows of conveyed objects K provided at the central portion of the longitudinal direction of the first rotating shafts 40 . At one of the ends on both sides of the central portion of the transport path H, a first transport roller 44 having a first support wheel 42 supporting the object K to be transported constituting the center row of , a plurality of second rotating shafts 48 arranged between the plurality of first rotating shafts 40, and one of the end rows of the plurality of second rotating shafts 48 arranged on both sides of the center row. A second conveying roller 52 having a second support wheel 50 for supporting the conveyed object K constituting an end row, and a plurality of rollers at the other end of the two ends of the central portion of the conveying path H. A plurality of third rotating shafts 54 arranged between the first rotating shafts 40 and concentric with the second rotating shaft 48, and a plurality of third rotating shafts 54 arranged on both sides of the center row From the side wall 30a of the hood 30 of the plurality of first rotating shafts 40 and the third conveying rollers 58 having the third supporting wheels 56 for supporting the conveyed object K constituting the other end row of the end rows, A first rotary drive device 60 for rotating and driving the protruding shaft ends 40a in synchronization with each other, and the shaft ends 48a of the plurality of second rotating shafts 48 protruding from the side walls 30a of the hood 30 are rotated in synchronization with each other. a second rotary drive device 62 for driving; a third rotary drive device 64 for synchronizing and driving shaft end portions 54b of the plurality of third rotary shafts 54 protruding from the side walls 30b of the hood 30; The first rotary drive device 60 and the first rotary drive device 60 are arranged so that the positional difference in the conveying direction A1 between the conveyed objects K adjacent in the direction orthogonal to the conveying direction A1 among the conveyed objects K conveyed in a double row state on the surface H is small. and a controller 68 that controls the second rotary drive 62 and the third rotary drive 64 .

As a result, since the first rotating shaft 40, the second rotating shaft 48, and the third rotating shaft 54 are driven in the conveying path H, that is, at the shaft end protruding from the hood 30, that is, outside the hood 30, The first rotary shaft 40, the second rotary shaft 48 and the third rotary shaft 54 are rotationally driven by the first rotary drive device 60, the second rotary drive device 62 and the third rotary drive device 64, respectively, at separated positions. Contamination of the heat treatment material conveyed together with the object K to be conveyed by the fine powder of is suppressed. Further, even if the conveyed object K meanders in the direction orthogonal to the conveying direction A1 due to bending of the furnace-inside conveying rollers 16 in the heating furnace 12, for example, on the upstream side of the conveying direction A1, the controller 68 controls the first Positions in the conveying direction A1 of the conveyed object K conveyed on the conveying roller 44, the conveyed object K conveyed on the second conveying roller 52, and the conveyed object K conveyed on the third conveying roller 58 Since the difference is reduced, conveyed objects K adjacent in the direction orthogonal to the conveying direction A1 are laterally aligned.

According to the object-to-be-heated conveying device 8 of the heating furnace 12 of the present embodiment, the first rotating shaft 40 of the first conveying roller 44 has a diameter larger than that of the first rotating shaft 40 and the object to be conveyed K A plurality of first support wheels 42 are provided at predetermined intervals, and a second rotating shaft 48 of the second conveying roller 52 has a diameter larger than that of the second rotating shaft 48 and is conveyed. A plurality of second support wheels 50 for supporting the object K are provided at predetermined intervals, and the third rotating shaft 54 of the third conveying roller 58 has a diameter larger than that of the third rotating shaft 54. A plurality of third support wheels 56 for supporting the transported object K are provided at predetermined intervals, and the first support wheel 42 has a larger diameter than the second support wheel 50 and the third support wheel 56. . As a result, the object K conveyed by the second conveying rollers 52 and the third conveying rollers 58 tends to separate from the object K conveyed by the first conveying rollers 44 . Interference between the transported object K transported by the second transport roller 52 and the transported object K transported by the second transport roller 52 and the third transport roller 58 is avoided.

According to the object-to-be-heated conveying device 8 of the heating furnace 12 of the present embodiment, the object K to be conveyed is a box-shaped sagger made of ceramic material for containing the material to be heat-treated. Both the support ring 50 and the third support ring 56 are made of ceramic material. As a result, the generation of fine metal powder is suitably suppressed.

Although the present invention has been described in detail with reference to the drawings, the present invention is also applicable in other aspects.

For example, in the above-described embodiment, the objects K to be conveyed were conveyed in six rows in the furnace body 14 and in the roller-type conveying device 10, but they may be conveyed in a single row.

Also, the object K to be conveyed may be something other than a sagger, such as a sintered alloy compact.

Moreover, in the above-described embodiments, the heating furnace 12 may be one that performs firing in an air atmosphere. In this case, part or all of the separating conveyor 22, the dispensing conveyor 23, the hood 30, the replacement chamber 32, and the transferred object alignment device 28 may be removed.

It should be noted that what has been described above is merely an embodiment of the present invention, and the present invention can be modified in various ways without departing from the gist of the present invention.

8: To-be-heated object conveying device 10: Roller type conveying device 12: Heating furnace 14: Furnace body 18a: Upstream furnace speed conveying roller (conveying roller)
18b: Downstream transport roller (transport roller)
20: 3-row conveyor 22: Separation conveyor (roller type separation conveyor)
24: Stopper 26: Width adjusting device 28: Transferred object alignment device 30: Hood 30a: Side wall 30b: Side wall 32e: Entrance shutter (shutter)
40: First rotating shaft 40a: Shaft end (shaft end)
40b: shaft end (shaft end)
42: First support wheel 44: First conveying roller (conveying roller)
48: Second rotating shaft 48a: Shaft end (shaft end)
50: Second support ring 52: Second conveying roller (conveying roller)
54: Third rotating shaft 54b: Shaft end (shaft end)
56: Third support ring 58: Third conveying roller (conveying roller)
60: First rotary drive device (rotary drive device)
62: Second rotary drive device (rotary drive device)
64: Third rotary drive (rotary drive)
68: Control device 70: Separation conveying roller (conveying roller)
72: Separation rotary drive device (rotary drive device)
74: Dispensing Conveyance Roller (Conveyance Roller)
76: Dispensing rotary drive device (rotary drive device)
A1: Conveying direction H: Conveying path K: Object to be conveyed (object to be heated)
SB: Sealed bearing

That is, the gist of the first invention is (a) a heated object conveying device for a heating furnace, which feeds the heated object in a high temperature state from the outlet of the heating furnace, and (b) parallel to the conveying direction (c) a roller-type conveying device that conveys the object to be heated sent out from the outlet of the heating furnace using a plurality of conveying rollers forming a conveying path; (d) a rotary driving device for rotating shaft ends of the plurality of conveying rollers protruding from side walls of the hood, respectively. (e) the roller-type conveying device includes a three-row conveyor that conveys the objects to be heated in at least three rows, and the three-row conveyor (e1) rotates while penetrating the conveying path in the width direction; a plurality of first rotating shafts to be driven; and the heated object which is provided at a central portion in the longitudinal direction of the first rotating shaft and constitutes a central row of three or more rows of the objects to be heated. and (e2) between the plurality of first rotating shafts at one of both ends of the central portion of the conveying path. and a plurality of second rotating shafts arranged on the second rotating shaft and supporting the object to be heated constituting one end row of the end rows arranged on both sides of the center row. and (e3) disposed between the plurality of first rotating shafts at the other end of both ends of the central portion of the transport path. a plurality of third rotating shafts; and a third support wheel supporting the object to be heated, which constitutes the other end row of the end rows arranged on both sides of the center row, provided on the third rotating shaft. (e4) a first rotary drive device for synchronizing and driving the shaft ends of the plurality of first rotary shafts protruding from the side wall of the hood, and (e5) (e6) a second rotary drive device for synchronizing and driving the shaft ends of the plurality of second rotary shafts projecting from the side wall of the hood; and (e6) the hood of the plurality of third rotary shafts. (e7) a direction orthogonal to the conveying direction among the objects to be heated conveyed in a double row state on the conveying path; and a control device that controls the first rotary drive device, the second rotary drive device, and the third rotary drive device so that the positional difference in the conveying direction of the objects to be heated adjacent to each other becomes small. To be.

The gist of the sixth invention is that: (a) the first rotating shaft of the first conveying roller has a plurality of rollers having a larger diameter than the first rotating shaft and supporting the object to be heated; (b) the second rotating shaft of the second conveying roller has a larger diameter than the second rotating shaft and supports the object to be heated; (c) the third rotating shaft of the third conveying roller has a larger diameter than the third rotating shaft and the heated a plurality of third support wheels for supporting objects are provided apart from each other; The reason is that the diameter is larger than that of the three support wheels.

The gist of the seventh aspect of the invention is that the object to be heated is a box-shaped sagger made of a ceramic material for containing the heat treatment material, and the first support ring, the second support ring and the third support ring are provided. The rings are both made of ceramic material.

According to the object-to-be-heated conveying device for a heating furnace of the first invention, the object to be heated sent out from the outlet of the heating furnace is conveyed using a plurality of conveying rollers forming a conveying path in parallel in the conveying direction. a roller-type conveying device; a hood airtightly provided following the furnace body of the heating furnace and covering the object to be heated on the roller-type conveying device; a rotary drive device that drives the shaft end to rotate. As a result, since the object to be heated on the roller type conveying device is covered with the hood, the temperature drop of the object to be heated is suppressed and the limitation on the conveying distance of the roller type conveying device is eased. The degree of freedom in designing devices and the like can be increased. In addition, since the shaft ends of the plurality of conveying rollers protruding from the side wall of the hood are rotationally driven by the rotary drive device at a position away from the conveying path, the object to be heated and the object to be heated made of metallic fine powder can be heated. Metal contamination of the heat-treated material inside is preferably suppressed.
Further, according to the object-to-be-heated conveying device for a heating furnace of the first invention, the roller-type conveying device includes a three-row conveyor for conveying the object to be heated in at least three rows, and the three-row conveyor is configured to convey the object to be heated in at least three rows. a plurality of first rotating shafts penetrating in the width direction of the passage and driven to rotate; A first conveying roller having a first support ring supporting the object to be heated constituting a central row of the rollers, and a plurality of rollers at one end of both ends of the central portion of the conveying path. A plurality of second rotating shafts arranged between the first rotating shafts, and one end row of the plurality of second rotating shafts arranged on both sides of the center row. a second conveying roller having a second support ring for supporting the object to be heated, and a plurality of the first rotating shafts at the other end of both ends of the central portion of the conveying path and a plurality of third rotating shafts arranged on the third rotating shaft and supporting the object to be heated constituting the other end row of the end rows arranged on both sides of the center row. a third conveying roller having a third supporting wheel; a first rotary driving device for synchronizing and driving the shaft ends of the plurality of first rotary shafts protruding from the side wall of the hood; a second rotary drive device for synchronizing and driving the shaft ends of the second rotary shafts protruding from the side wall of the hood, and a plurality of shafts of the third rotary shafts protruding from the side wall of the hood a third rotary driving device that rotates and drives end portions in synchronization with each other; and among the objects to be heated that are conveyed in a double row state on the conveying path, the objects to be heated that are adjacent in the direction perpendicular to the conveying direction. a control device that controls the first rotary drive device, the second rotary drive device, and the third rotary drive device such that the positional difference in the conveying direction is reduced. As a result, the ends of the first, second, and third rotating shafts protruding from the conveying path, that is, from the hood, are driven. The second rotary shaft and the third rotary shaft are driven to rotate by the first rotary drive device, the second rotary drive device and the third rotary drive device, respectively, and the contamination of the heat treatment material conveyed together with the object to be heated by metallic fine powder is prevented. preferably suppressed. In addition, even if the object to be heated meanders in the direction perpendicular to the conveying direction due to the bending of the conveying roller in the upstream side of the conveying direction, for example, in the heating furnace, the object conveyed on the first conveying roller is controlled by the control device. Since the positional difference in the conveying direction between the object to be heated, the object to be heated conveyed on the second conveying roller, and the object to be heated conveyed on the third conveying roller is reduced, they are adjacent in the direction orthogonal to the conveying direction. The objects to be heated are aligned in the lateral direction.

According to the object-to-be-heated conveying device for a heating furnace of the sixth invention, the first rotating shaft of the first conveying roller has a diameter larger than that of the first rotating shaft and supports the object to be heated. A plurality of first support wheels are provided apart from each other, and the second rotating shaft of the second conveying roller has a diameter larger than that of the second rotating shaft and supports the object to be heated. A plurality of second support rings are provided apart from each other, and the third rotating shaft of the third conveying roller has a diameter larger than that of the third rotating shaft and supports the object to be heated. and a plurality of third support rings are provided apart from each other, and the plurality of first support rings are larger than the plurality of second support rings and the plurality of third support rings. diameter. As a result, the heated object conveyed by the second conveying roller and the third conveying roller tends to separate from the heated object conveyed by the first conveying roller, and the heated object conveyed by the first conveying roller tends to separate. Interference between the object and the object to be heated conveyed by the second conveying roller and the third conveying roller is avoided.

According to the object-to-be-heated conveying device for a heating furnace of the seventh aspect of the invention, the object to be heated is a box-shaped sagger made of a ceramic material that accommodates the material to be heat-treated, and the first support ring and the second support Both the ring and said third support ring are made of ceramic material. As a result, the generation of fine metal powder is suitably suppressed.

Claims (8)

A heated object conveying device for a heating furnace that delivers the heated object in a high temperature state from the outlet of the heating furnace,
a roller-type conveying device that conveys the object to be heated sent out from the exit of the heating furnace using a plurality of conveying rollers that form a conveying path in parallel in the conveying direction;
a hood airtightly provided following the furnace body of the heating furnace and covering the object to be heated on the roller type conveying device;
and a rotation drive device that rotates shaft end portions of the plurality of conveying rollers that protrude from the side wall of the hood. The roller-type conveying device includes a roller-type separating conveyor that separates the objects to be heated from each other by conveying the objects to be heated at a speed higher than the conveying speed in the heating furnace,
The rotation drive device includes a separation rotation drive device that rotates shaft ends protruding from side walls of the hood of a plurality of separation conveying rollers provided on the roller type separation conveyor. The object-to-be-heated conveying device of the heating furnace according to claim 1. The object-to-be-heated conveying apparatus for a heating furnace according to claim 2, wherein the hood has a shutter on the downstream side in the conveying direction and also covers the object to be heated on the roller-type separating conveyor. . a conveyed object aligning device for aligning the objects to be heated conveyed by the roller type separation conveyor in a direction perpendicular to the conveying direction by abutting the objects to be heated against a stopper; 4. The object-to-be-heated conveying device for a heating furnace according to claim 2 or 3. The transported object aligning device holds the horizontal row of the objects to be heated that have been abutted against the stopper so as to be movable in a direction orthogonal to the transport direction, and sandwiches them in a direction orthogonal to the transport direction. 5. The object-to-be-heated conveying device for a heating furnace according to claim 4, further comprising a width adjusting device for bringing the objects to be heated into close contact with each other. The roller-type conveying device includes a three-row conveyor that conveys the objects to be heated in at least three rows,
The three-row conveyor,
A plurality of first rotating shafts that are driven to rotate while passing through the conveying path in the width direction; a first conveying roller having a first support wheel supporting the object to be heated constituting a central row of objects;
a plurality of second rotating shafts disposed between the plurality of first rotating shafts at one of both ends of the central portion of the conveying path; a second conveying roller having a second support ring that supports the object to be heated and constitutes one of the end rows arranged on both sides of the central row;
a plurality of third rotating shafts arranged between the plurality of first rotating shafts at the other end of both ends of the central portion of the conveying path; a third conveying roller having a third support wheel supporting the object to be heated, which constitutes the other end row of the end rows arranged on both sides of the central row;
a first rotation driving device for synchronizing and rotating shaft end portions of the plurality of first rotation shafts protruding from the side wall of the hood;
a second rotary drive device for synchronizing and driving the shaft ends of the plurality of second rotary shafts protruding from the side wall of the hood;
a third rotary drive device for synchronizing and driving the shaft ends of the plurality of third rotary shafts protruding from the side wall of the hood;
the first rotary drive device such that a positional difference in the conveying direction of the objects to be heated which are adjacent to each other in a direction orthogonal to the conveying direction among the objects to be heated conveyed in a double-row state on the conveying path is reduced; The object-to-be-heated conveying apparatus for a heating furnace according to any one of claims 1 to 5, further comprising a control device that controls the second rotary drive device and the third rotary drive device. The first rotating shaft of the first conveying roller is provided with a plurality of the first supporting wheels having a diameter larger than that of the first rotating shaft and supporting the object to be heated. ,
The second rotating shaft of the second conveying roller is provided with a plurality of the second supporting wheels having a diameter larger than that of the second rotating shaft and supporting the object to be heated. ,
The third rotating shaft of the third conveying roller is provided with a plurality of the third supporting wheels having a diameter larger than that of the third rotating shaft and supporting the object to be heated. ,
7. The heating furnace according to claim 6, wherein the plurality of first support rings are larger in diameter than the plurality of second support rings and the plurality of third support rings. to-be-heated object conveying device. The object to be heated is a box-shaped sagger made of a ceramic material containing a heat treatment material,
The object-to-be-heated conveying device for a heating furnace according to claim 6 or 7, wherein the first support ring, the second support ring, and the third support ring are all made of a ceramic material.

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