JP2022151153A - Transport device of heating furnace - Google Patents

Abstract

To provide a transport device of a heating furnace capable of reducing the whole length of a heating furnace.SOLUTION: A transport device of a heating furnace comprises: a roller type transport device 10 covered by a hood 30 air-tightly provided subsequentially to the furnace body 14 of a heating furnace 12 so as to be maintained in an atmosphere in the heating furnace 12 and transporting objects K to be transported fed out in plural lines from the outlet of the heating furnace 12 using plural transport rollers standing in a line at prescribed central intervals in a transport direction A1 to form a transport passage H; and a substitution chamber 32 comprising an inlet shutter 32e and an outlet shutter 32, air-tightly provided subsequentially to the hood 30 and stored with the objects K to be transported in a horizontal line between the inlet shutter 32e and the outlet shutter 32f. Therefore, since it is not necessary to provide a cooling region for holding a heating treatment material under a gas atmosphere till it reaches a relatively low temperature and a substitution chamber at the inside of the heating furnace 12, the furnace length of the heating furnace 12 and the cost of the heat facility are reduced.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 unloading an object heat-treated in a gas atmosphere from a heating furnace.

2. Description of the Related Art There is known a conveying apparatus that conveys an object heat-treated in a gas atmosphere from a heating furnace to a predetermined position, for example, an object reversing device. For example, there is a roller-type conveying apparatus including heating furnace conveying rollers for conveying a powder container from the outlet of the heating furnace in Patent Document 1.

The roller-type conveying apparatus of Patent Document 1 conveys an object to be conveyed to an outlet handling apparatus in an atmospheric atmosphere, unlike a heating furnace in which heat treatment is performed in a gas atmosphere.

Japanese Patent No. 6552763

The heating furnace described in Patent Literature 1 includes a shutter device for maintaining a gas atmosphere in the vicinity of an exit following a heating area for heat-treating an object to be transferred in a gas atmosphere. For this reason, in particular, when the heat treatment material to be heat-treated in the heating furnace is a material that needs to be kept in a gas atmosphere until it reaches a relatively low temperature, the total length of the heating furnace is long, and the heat including the heating furnace is increased. There was a problem that the equipment was expensive.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a heating furnace conveying apparatus capable of shortening the overall length of the heating furnace.

As a result of various investigations in order to solve the above-mentioned problems, the inventors of the present invention have found that a heat insulating material is not necessarily required to hold the heat-treated material in a gas atmosphere until it reaches a relatively low temperature and then expose it to the atmosphere. Focusing on the fact that there is no need to provide a shutter device in the enclosed furnace, a hood is provided to surround the transfer furnace from the outlet of the heating furnace, the inside of the hood is made into a gas atmosphere, and a replacement chamber is provided at the outlet of the hood. It has been found that the length of the furnace can be shortened and the cost of the heat equipment can be reduced. The present invention has been made based on such findings.

That is, the gist of the first invention is (a) a heating furnace conveying apparatus for conveying an object to be conveyed that has been heat-treated in a predetermined atmosphere and sent out from an outlet of the heating furnace, and (b) the heated and (c) a hood that is airtightly installed following the furnace body of the furnace and maintained in the atmosphere in the heating furnace; (d) a roller-type conveying device that conveys the object sent out in double rows from the exit of the heating furnace using a plurality of conveying rollers; and a replacement chamber provided between the inlet shutter and the outlet shutter for accommodating the transferred object.

The gist of the second invention is that the roller-type conveying device includes a furnace speed conveyor that conveys at the same speed as in the heating furnace, and the Roller type separation for separating the horizontal row of the conveyed objects in the direction perpendicular to the conveying direction before being sent to the replacement chamber at a speed higher than the furnace speed conveyor using a separation conveying roller and sending it into the replacement chamber. Containing a conveyor.

The gist of the third aspect of the invention is that, on the heating furnace side of the replacement chamber, there is provided, among the objects to be transported transported on the transport path, a direction orthogonal to the transport direction before being sent to the replacement chamber. A transported object aligning device is provided for aligning the transport direction positions of the transported objects by abutting the laterally aligned transported objects against the stopper.

The gist of the fourth aspect of the invention is that the conveyed object aligning device supports the conveyed objects in a horizontal row that abut against the stopper so as to be movable in the direction orthogonal to the conveying direction, and the conveying device aligns the conveyed objects. The present invention includes a width aligning device that pinches the conveyed objects in a direction orthogonal to the direction to bring the conveyed objects into close contact with each other.

The gist of the fifth aspect of the invention is that the conveying roller is rotatably supported by a sealed bearing provided on the side wall of the hood.

The gist of the sixth invention is that (a) the roller-type conveying device includes a three-row conveyor for conveying the objects to be conveyed in at least three rows, and the three-row conveyor includes (b) the conveying path a plurality of first rotating shafts that are driven to rotate while penetrating in the width direction; (c) at one end of both ends of the central portion of the transport path, a plurality of second rotating shafts arranged between the plurality of first rotating shafts; and one end row of the plurality of end rows provided on the second rotating shafts and arranged on both sides of the center row. and (d) a plurality of rollers at the other end of the two ends of the central portion of the transport path. A plurality of third rotating shafts arranged between the first rotating shafts, and a plurality of the end rows arranged on both sides of the center row of the plurality of the third rotating shafts constitute the other end row. (e) shaft ends of the plurality of first rotating shafts protruding from side walls of the hood are rotated in synchronization with each other; (f) 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 (g ) a third rotary drive device for synchronizing the shaft ends of the plurality of third rotary shafts projecting from the side wall of the hood and driving them to rotate; The first rotary drive device, the second rotary drive device, and the third rotary drive device are arranged so that the positional difference in the conveying direction between the conveyed objects adjacent in the direction orthogonal to the conveying direction among the conveyed objects to be conveyed becomes small. It consists in including a control device for controlling the drive device.

The gist of the seventh invention is that the first rotating shaft of the first conveying roller is provided with a plurality of first rotating shafts having a larger diameter than the first rotating shaft and supporting the conveyed object. Support wheels are provided apart from each other, and the second rotating shaft of the second conveying roller has a plurality of second rotating shafts having a diameter larger than that of the second rotating shaft and supporting the conveyed object. Support wheels are provided apart from each other, and the third rotating shaft of the third conveying roller has a plurality of third rotating shafts having a diameter larger than that of the third rotating shaft and supporting the conveyed object. Support rings are provided apart from each other, and the plurality of first support rings are larger in diameter than the plurality of second support rings and the plurality of third support rings. It is in.

The gist of the eighth aspect of the invention is that the object to be transferred is a box-shaped sagger made of 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.

The gist of the ninth aspect of the invention is that the roller-type conveying device conveys the objects to be conveyed sent out from the heating furnace in a plurality of rows to the substitution chamber, and the substitution chamber extends in the conveying direction. further comprising a transfer conveyor that accommodates the objects to be conveyed in a horizontal row in the orthogonal direction, and that transfers the objects in the horizontal row taken out from the replacement chamber in a direction orthogonal to the conveying direction; It is in.

According to the transfer apparatus for a heating furnace of the first invention, a transfer apparatus for a heating furnace for transferring an object to be transferred that has been heat-treated in a predetermined atmosphere and sent out from an outlet of the heating furnace, wherein the furnace body of the heating furnace includes: Subsequently, a hood that is airtightly provided and maintained in the atmosphere in the heating furnace, and a plurality of conveying rollers that are covered by the hood and form a conveying path in parallel with a predetermined center interval in the conveying direction are used. a roller-type conveying device for conveying the object sent out in double rows from the outlet of the heating furnace; and a replacement chamber that accommodates the transported object. Therefore, since it is not necessary to provide a cooling area for holding the object to be transferred under a gas atmosphere until it reaches a relatively low temperature or a replacement chamber in the heating furnace, the length of the heating furnace can be shortened, and the heating equipment can be inexpensive. becomes.

According to the conveying device for the heating furnace of the second invention, the roller type conveying device includes a furnace speed conveyor that conveys at the same speed as in the heating furnace, and the object to be conveyed that has been conveyed by the furnace speed conveyor. A roller type in which the conveyed objects in a horizontal row in the direction perpendicular to the conveying direction before being sent to the replacing chamber are separated at a speed higher than the furnace speed conveyor using a separating conveying roller and sent into the replacing chamber. Including a breakaway conveyor. As a result, in the heating furnace, the distance between the objects to be conveyed can be reduced in the conveying direction, and the overall length of the heating furnace can be further shortened.

According to the transfer device for a heating furnace of the third aspect of the present invention, on the heating furnace side of the replacement chamber, the transported object transported on the transport path is orthogonal to the transport direction before being sent to the replacement chamber. A transported object aligning device is provided for aligning the transport direction positions of the transported objects by abutting the transported objects in a horizontal row in the direction to the stopper against the stopper. As a result, the transported objects are aligned in the direction orthogonal to the transport direction prior to being accommodated in the replacement chamber.

According to the conveying apparatus for the heating furnace of the fourth aspect of the invention, the conveyed object aligning device supports the conveyed objects abutted against the stopper in a horizontal row so as to be movable in the direction orthogonal to the conveying direction. a width aligning device that pinches the conveyed objects in a direction perpendicular to the conveying direction and brings the conveyed objects into close contact with each other. As a result, the objects to be transferred separated in a horizontal row are brought into close contact with each other in the direction orthogonal to the transfer direction, so that the replacement chamber can be set small, and gas consumption can be reduced.

According to the conveying device for the heating furnace of the fifth invention, the conveying roller is rotatably supported by a sealed bearing provided on the side wall of the hood. As a result, the conveying roller passing through the side wall of the hood is airtightly rotatably supported by the sealed bearing, so that airtightness within the hood is preferably maintained.

According to the conveying apparatus for a heating furnace of the sixth aspect of the invention, the roller-type conveying apparatus rotates and drives the shaft ends of the plurality of first rotating shafts protruding from the side wall of the hood in synchronization with each other. a one-rotation driving device; a second rotation-driving device for synchronizing and driving shaft ends of the plurality of second rotation shafts protruding from side walls of the hood; and a third rotation driving device. a third rotary drive device for synchronizing and driving shaft end portions protruding from side walls of the hood of the shaft 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 transport direction between the transported objects adjacent in the orthogonal direction is reduced. In this way, since the conveying path of the first rotating shaft, the second rotating shaft, and the third rotating shaft, that is, the shaft ends protruding from the hood, are driven, the first rotating shaft and the second rotating shaft are driven at a position away from the conveying path. The rotary shaft and the third rotary shaft are rotationally driven by the first rotary drive device, the second rotary drive device, and the third rotary drive device, respectively, and are conveyed together with the conveyed object K made of metallic fine powder and, for example, the conveyed object K. Contamination of the heat-treated material is preferably suppressed. Further, even if the conveyed object meanders in the direction perpendicular to the conveying direction due to the bending of the conveying roller in the heating furnace, the conveyed object is conveyed on the first conveying roller by the control device. Since the positional difference in the conveying direction between the conveyed object, the conveyed object conveyed on the second conveying roller, and the conveyed object conveyed on the third conveying roller is reduced, To-be-conveyed objects are laterally aligned.

According to the conveying apparatus for a heating furnace of the seventh aspect of the invention, the first rotating shaft of the first conveying roller has a plurality of rollers each having a diameter larger than that of the first rotating shaft and supporting the object to be conveyed. are provided apart from each other, and the second rotating shaft of the second conveying roller has a larger diameter than the second rotating shaft and supports the conveyed object. are provided apart from each other, and the third rotating shaft of the third conveying roller has a larger diameter than the third rotating shaft and supports the conveyed object. are provided apart from each other, and the plurality of first support rings are larger in diameter than the plurality of second support rings and the plurality of third support rings ing. As a result, the object conveyed by the second conveying roller and the third conveying roller tends to separate from the object conveyed by the first conveying roller. Interference between the object and the object conveyed by the second conveying roller and the third conveying roller is avoided.

According to the conveying apparatus for a heating furnace of the eighth invention, the object to be conveyed 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 The third support ring is both made of ceramic material. As a result, the generation of fine metal powder is suitably suppressed.

According to the conveying apparatus for a heating furnace of the ninth aspect of the present invention, (a) the roller-type conveying apparatus conveys the objects sent out from the heating furnace in a plurality of rows to the replacement chamber; ) the replacement chamber accommodates the articles to be transferred in a horizontal row in a direction perpendicular to the transfer direction; It further includes a transfer conveyor that transfers in a direction perpendicular to the conveying direction. As a result, in the reversing device for reversing the objects after the transfer conveyor, the objects conveyed in a line by the transfer conveyor can be sequentially reversed one by one.

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 (hereinafter referred to as a conveying device) 8 according to an embodiment of the present invention is attached to a heating furnace 12. FIG. The 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 central portion of the first rotating shaft 40 is flexed, the shaft end (free end) 48b of the second rotating shaft 48 is flexed, and the shaft end (free end) 54a of the third rotating shaft 54 is flexed. are suppressed, respectively, and deviation of the transported object K in the transport direction A1 due to bending 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 conveying device 8 of the heating furnace 12 of the present embodiment, the hood 30 is airtightly provided following the furnace body 14 of the heating furnace 12 and is maintained in the atmosphere inside the heating furnace 12, and is covered with the hood 30 in the conveying direction A1. A roller-type conveying device 10 that conveys an object to be conveyed K sent out in double rows from an exit of a heating furnace 12 using a plurality of conveying rollers forming a conveying path H in parallel at a predetermined center interval, and an entrance shutter 32e. and a replacement chamber 32 that is airtightly provided following the hood 30 with an exit shutter 32f and that accommodates the objects K arranged in a horizontal row between the entrance shutter 32e and the exit shutter 32f. Therefore, since it is not necessary to provide a cooling region for holding the material to be heat-treated under a gas atmosphere until it reaches a relatively low temperature and a replacement chamber 32 in the heating furnace 12, the furnace length of the heating furnace 12 can be shortened, and the heat equipment can be used. becomes cheaper.

According to the conveying device 8 of the heating furnace 12 of the present embodiment, the roller-type conveying device 10 conveys by the three-row conveyor (furnace speed conveyor) 20 that conveys at the same speed as in the heating furnace 12 and the three-row conveyor 20 Among the conveyed objects K that have been conveyed, the conveyed objects K in a horizontal row in the direction orthogonal to the conveying direction A1 before being sent to the replacement chamber 32 are moved at a speed higher than that of the three-row conveyor 20 by using the separating conveying roller 70. and a separating conveyor (roller type separating conveyor) 22 for separating and feeding into the replacement chamber 32 . As a result, the space between the objects K to be transferred can be narrowed in the transfer direction A1 in the heating furnace, and the overall length of the heating furnace 12 can be further shortened.

According to the conveying device 8 of the heating furnace 12 of the present embodiment, on the side of the heating furnace 12 of the substitution chamber 32, among the objects K conveyed on the conveying path, there is a horizontal row of objects before being sent to the substitution chamber 32. A transported object aligning device 28 is provided for aligning the transport direction position of the transported object K by abutting the transported object K against the stopper 24 . 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 conveying device 8 of the heating furnace 12 of the present embodiment, the conveyed object aligning device 28 can move the conveyed objects K in a horizontal row, which abut against the stopper 24, in a direction perpendicular to the conveying direction A1. It includes a width adjusting device 26 that clamps the transported objects K in a direction orthogonal to the transporting direction A1 in a supported state so that the transported objects K are brought into close contact with each other. As a result, the separated objects K are brought into close contact with each other in a direction orthogonal to the transport direction A1, so that the replacement chamber 32 can be set small, and gas consumption can be reduced.

According to the conveying device 8 of the heating furnace 12 of the present embodiment, the conveying rollers of the roller-type conveying device 10, such as the first conveying rollers 44, the second conveying rollers 52, the third conveying rollers 58 of the three-row conveyor 20, and the separating rollers The separating/conveying roller 70 and the like of the conveyor 22 are rotatably supported by sealed bearings SB provided on the side wall of the hood. As a result, the conveying rollers penetrating the side walls 30a and 30b of the hood 30 are airtightly rotatably supported by the sealed bearings SB, so that the airtightness inside the hood 30 is preferably maintained.

According to the conveying device 8 of the heating furnace 12 of the present embodiment, the roller-type conveying device 10 includes the three-row conveyor 20, and the three-row conveyor 20 is driven to rotate while penetrating the conveying path H in the width direction. A plurality of first rotating shafts 40, and a plurality of the first rotating shafts 40 are provided at the center in the longitudinal direction to support the transported object K constituting the center row of the plurality of rows of the transported objects K. and a first conveying roller 44 having a first supporting ring 42 and one end of both ends of the central portion of the conveying path H, which are arranged between the plurality of first rotating shafts 40. and a plurality of second rotating shafts 48 which are provided on the second rotating shafts 48 and which form one end row of the end rows arranged on both sides of the center row and which support the transferred object K. A second conveying roller 52 having a supporting ring 50 and a second rotating roller 52 between a plurality of first rotating shafts 40 and at the other end of both ends of the central portion of the conveying path H. A plurality of third rotating shafts 54 arranged concentrically with the shaft 48; A third conveying roller 58 having a third support wheel 56 for supporting an object K and shaft ends 40a of the plurality of first rotating shafts 40 protruding from the side wall 30a of the hood 30 are mutually synchronously driven to rotate. a first rotary drive device 60; a second rotary drive device 62 that rotates and drives the shaft ends 48a of the plurality of second rotary shafts 48 protruding from the side walls 30a of the hood 30 in synchronization with each other; A third rotary drive device 64 that rotates shaft end portions 54b of the three rotary shafts 54 protruding from the side wall 30b of the hood 30 in synchronization with each other, and the conveyed objects K that are conveyed in a double row on the conveying path H. and a control device 68 for controlling the first rotary drive device 60, the second rotary drive device 62 and the third rotary drive device 64 so as to synchronize them in the direction perpendicular to the conveying direction A1. As a result, the first rotating shaft 40, the second rotating shaft 48, and the third rotating shaft 54 are driven at the shaft ends protruding from the conveying path H, that is, 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 rotated by the first rotary drive device 60, the second rotary drive device 62, and the third rotary drive device 64, respectively. Contamination of the material to be heat-treated which is conveyed together with the object to be conveyed K due to the fine powder is preferably 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 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 larger diameter than the first rotating shaft 40 and supports the object K to be conveyed. A plurality of first support wheels 42 are provided at predetermined intervals. A plurality of second support wheels 50 for supporting are provided at predetermined intervals. A plurality of third support wheels 56 for supporting K are provided at predetermined intervals. 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 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 that accommodates the heat treatment material, and the first support ring 42 and the second support ring 50 and the third support ring 56 are both made of ceramic material. As a result, the generation of fine metal powder is suitably suppressed.

According to the conveying device 8 of the heating furnace 12 of this embodiment, the roller-type conveying device 10 conveys the objects K sent out from the heating furnace 12 in a plurality of rows to the replacement chamber 32. accommodates a horizontal row of objects K in the direction perpendicular to the conveying direction A1, and the conveying device 8 transports the horizontal row of objects K taken out of the replacement chamber 32 in a direction perpendicular to the conveying direction A1. Further includes a transfer conveyor 36 for transferring to. As a result, in a reversing device (not shown) after the transfer conveyor 36, the objects K conveyed in a line by the transfer conveyor 36 can be sequentially reversed one by one.

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: Conveyor 10: Roller Conveyor 12: Heating Furnace 14: Furnace Body 20: 3 Row Conveyor (Furnace Speed Conveyor)
30: Hood 32e: Entrance shutter 32f: Exit shutter 32: Replacement chamber 22: Separation conveyor (roller type separation conveyor)
24: Stopper 28: Conveyed object alignment device 36: Transfer conveyor 40: First rotating shaft 42: First support wheel 44: First conveying roller (conveying roller)
48: Second rotating shaft 50: Second supporting wheel 52: Second conveying roller (conveying roller)
54: Third rotating shaft 56: Third supporting wheel 58: Third conveying roller (conveying roller)
60: First rotary drive device 62: Second rotary drive device 64: Third rotary drive device 68: Control device 74: Separation conveying roller (conveying roller)
K: Conveyed object SB: Sealed bearing

That is, the gist of the first invention is (a) a heating furnace conveying apparatus for conveying an object to be conveyed that has been heat-treated in a predetermined atmosphere and sent out from an outlet of the heating furnace, and (b) the heated and (c) a hood that is airtightly installed following the furnace body of the furnace and maintained in the atmosphere in the heating furnace; (d) a roller-type conveying device that conveys the object sent out in double rows from the exit of the heating furnace using a plurality of conveying rollers; a displacement chamber provided between the entrance shutter and the exit shutter for accommodating the objects to be conveyed; (e1) a plurality of first rotating shafts penetrating in the width direction of the conveying path and driven to rotate; and a central portion of the first rotating shaft in the longitudinal direction. (e2) a first conveying roller having a first support ring provided in a plurality of the conveying paths to support the conveyed objects constituting a central row of the conveyed objects in the three or more rows; a plurality of second rotating shafts arranged between the plurality of first rotating shafts at one end of both ends of the central portion; (e3) the central portion of the conveying path; and a plurality of third rotating shafts disposed between the plurality of first rotating shafts, and a plurality of the third rotating shafts provided at the other end of the two ends of the center (e4) a third conveying roller having a third support wheel supporting the conveyed object constituting the other end row of the end rows lined up on both sides of the row; (e5) a first rotary driving device for synchronizing and driving shaft ends protruding from the side wall of the hood to rotate; and (e5) shaft ends of the plurality of second rotary shafts protruding from the side wall of the hood (e6) a second rotary drive device that rotates in synchronization with each other; (e7) a rotation driving device, in the conveying direction, of the conveyed object adjacent in the direction orthogonal to the conveying direction among the conveyed objects conveyed in a double-row state on the conveying path; and a control device for controlling the first rotary drive device, the second rotary drive device and the third rotary drive device so that the positional difference between the two rotary drive devices becomes small .

The gist of the sixth invention is that the first rotating shaft of the first conveying roller is provided with a plurality of first rotating shafts having a larger diameter than the first rotating shaft and supporting the conveyed object. Support wheels are provided apart from each other, and the second rotating shaft of the second conveying roller has a plurality of second rotating shafts having a diameter larger than that of the second rotating shaft and supporting the conveyed object. Support wheels are provided apart from each other, and the third rotating shaft of the third conveying roller has a plurality of third rotating shafts having a diameter larger than that of the third rotating shaft and supporting the conveyed object. Support rings are provided apart from each other, and the plurality of first support rings are larger in diameter than the plurality of second support rings and the plurality of third support rings. It is in.

The gist of the seventh aspect of the invention is that the object to be transferred is a box-shaped sagger made of ceramic material for containing the heat-treated 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.

The gist of the eighth invention is that the roller-type conveying device conveys the objects to be conveyed sent out from the heating furnace in a plurality of rows to the substitution chamber, and the substitution chamber is arranged in the conveying direction. further comprising a transfer conveyor that accommodates the objects to be conveyed in a horizontal row in the orthogonal direction, and that transfers the objects in the horizontal row taken out from the replacement chamber in a direction orthogonal to the conveying direction; It is in.

According to the transfer apparatus for a heating furnace of the first invention, a transfer apparatus for a heating furnace for transferring an object to be transferred that has been heat-treated in a predetermined atmosphere and sent out from an outlet of the heating furnace, wherein the furnace body of the heating furnace includes: Subsequently, a hood that is airtightly provided and maintained in the atmosphere in the heating furnace, and a plurality of conveying rollers that are covered by the hood and form a conveying path in parallel with a predetermined center interval in the conveying direction are used. a roller-type conveying device for conveying the object sent out in double rows from the outlet of the heating furnace; and a replacement chamber that accommodates the transported object. Therefore, since it is not necessary to provide a cooling area for holding the object to be transferred under a gas atmosphere until it reaches a relatively low temperature or a replacement chamber in the heating furnace, the length of the heating furnace can be shortened, and the heating equipment can be inexpensive. becomes.
Further, according to the conveying apparatus for a heating furnace of the first invention, the roller-type conveying apparatus rotates and drives the shaft ends of the plurality of first rotating shafts protruding from the side wall of the hood in synchronization with each other. a second rotary drive device for synchronizing and driving shaft ends of the plurality of second rotary shafts protruding from the side wall of the hood; and a third rotary drive device for synchronizing and driving shaft end portions protruding from side walls of the hood of the three rotary shafts to rotate; 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 between the conveyed objects adjacent in the direction orthogonal to the direction becomes small. . In this way, since the conveying path of the first rotating shaft, the second rotating shaft, and the third rotating shaft, that is, the shaft ends protruding from the hood, are driven, the first rotating shaft and the second rotating shaft are driven at a position away from the conveying path. The rotary shaft and the third rotary shaft are rotationally driven by the first rotary drive device, the second rotary drive device, and the third rotary drive device, respectively, and are conveyed together with the conveyed object K made of metallic fine powder and, for example, the conveyed object K. Contamination of the heat-treated material is preferably suppressed. Further, even if the conveyed object meanders in the direction perpendicular to the conveying direction due to the bending of the conveying roller in the heating furnace, the conveyed object is conveyed on the first conveying roller by the control device. Since the positional difference in the conveying direction between the conveyed object, the conveyed object conveyed on the second conveying roller, and the conveyed object conveyed on the third conveying roller is reduced, To-be-conveyed objects are laterally aligned.

According to the conveying apparatus for a heating furnace of the sixth aspect of the invention, the first rotating shaft of the first conveying roller has a plurality of rollers each having a diameter larger than that of the first rotating shaft and supporting the object to be conveyed. are provided apart from each other, and the second rotating shaft of the second conveying roller has a larger diameter than the second rotating shaft and supports the conveyed object. are provided apart from each other, and the third rotating shaft of the third conveying roller has a larger diameter than the third rotating shaft and supports the conveyed object. are provided apart from each other, and the plurality of first support rings are larger in diameter than the plurality of second support rings and the plurality of third support rings ing. As a result, the object conveyed by the second conveying roller and the third conveying roller tends to separate from the object conveyed by the first conveying roller. Interference between the object and the object conveyed by the second conveying roller and the third conveying roller is avoided.

According to the conveying apparatus for a heating furnace of the seventh invention, the object to be conveyed is a box-shaped sagger made of ceramic material for containing the heat treatment material, and the first support ring, the second support ring and the The third support ring is both made of ceramic material. As a result, the generation of fine metal powder is suitably suppressed.

According to the conveying apparatus for a heating furnace of the eighth aspect of the invention, (a) the roller-type conveying apparatus conveys the objects to be conveyed sent out from the heating furnace in a plurality of rows to the replacement chamber; ) the replacement chamber accommodates the articles to be transferred in a horizontal row in a direction perpendicular to the transfer direction; It further includes a transfer conveyor that transfers in a direction perpendicular to the conveying direction. As a result, in the reversing device for reversing the objects after the transfer conveyor, the objects conveyed in a line by the transfer conveyor can be sequentially reversed one by one.

Claims (9)

A conveying device for a heating furnace that conveys an object to be conveyed that has been heat-treated under a predetermined atmosphere and sent out from an outlet of the heating furnace,
a hood airtightly provided following the furnace body of the heating furnace and maintained in the atmosphere in the heating furnace;
a roller-type conveying device that conveys the object to be conveyed that is sent out in double rows from the exit of the heating furnace using a plurality of conveying rollers that are covered with the hood and form a conveying path in parallel in the conveying direction;
a replacement chamber provided with an entrance shutter and an exit shutter, airtightly provided following the hood, and containing the object to be conveyed between the entrance shutter and the exit shutter. . The roller-type conveying device includes a furnace speed conveyor that conveys at the same speed as in the heating furnace, and an object that has been conveyed by the furnace speed conveyor in the conveying direction before being sent to the replacement chamber. a roller-type separating conveyor that separates the conveyed objects in a horizontal row in the orthogonal direction at a speed higher than that of the furnace speed conveyor using separating conveying rollers and feeds them into the replacement chamber. The conveying device for a heating furnace according to claim 1. On the heating furnace side of the substitution chamber, a horizontal row of the objects transported on the transport path before being sent to the substitution chamber in a direction orthogonal to the transport direction is used as a stopper. 3. The conveying apparatus for a heating furnace according to claim 1, further comprising a conveyed object aligning device for aligning the conveyance direction positions of the conveyed objects by abutting against each other. The conveyed object aligning device supports the horizontally aligned conveyed objects that have hit against the stopper so as to be movable in a direction perpendicular to the conveying direction, and sandwiches the conveyed objects in a direction perpendicular to the conveying direction. 4. The conveying apparatus for a heating furnace according to claim 3, further comprising a width adjusting device for bringing the objects to be conveyed into close contact with each other. 5. The heating furnace conveying device according to any one of claims 1 to 4, wherein the conveying roller is rotatably supported by a sealed bearing provided on a side wall of the hood. The roller-type conveying device includes a three-row conveyor that conveys the objects to be conveyed in at least three rows, and the three-row conveyor comprises:
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 that supports the conveyed object forming a central row of the conveyed objects;
a plurality of second rotating shafts disposed between the plurality of first rotating shafts at one end 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 conveyed and that constitutes one of end rows of a plurality of end rows arranged on both sides of the central row;
a plurality of third rotating shafts disposed 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 ring that supports the conveyed object and constitutes the other end row of the plurality of 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 axial ends of the plurality of second rotary shafts protruding from the side wall of the hood, respectively;
a third rotation driving device for synchronizing and rotating shaft end portions of the plurality of third rotation 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 conveyed objects adjacent to each other in a direction orthogonal to the conveying direction among the conveyed objects conveyed in a double row state on the conveying path is reduced; 6. The heating furnace conveying device 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 conveyed object are provided apart from each other. ,
The second rotating shaft of the second conveying roller is provided with a plurality of the second supporting rings having a diameter larger than that of the second rotating shaft and supporting the conveyed object. ,
The third rotating shaft of the third conveying roller is provided with a plurality of the third supporting rings having a diameter larger than that of the third rotating shaft and supporting the conveyed object are provided apart from each other. ,
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. transport device. The object to be transferred is a box-shaped sagger made of 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 all made of ceramic material. 8. The heating furnace conveying device according to claim 6 or 7. The roller-type conveying device conveys the objects sent out from the heating furnace in a plurality of rows to the replacement chamber,
The replacement chamber accommodates the objects to be transferred in a horizontal row in a direction perpendicular to the transfer direction,
9. The transportation of the heating furnace according to any one of claims 1 to 8, further comprising a transfer conveyor that transfers the horizontal row of the objects taken out of the replacement chamber in a direction orthogonal to the transfer direction. Device.

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