JP2022037806A - Vertical heating furnace - Google Patents

Abstract

To provide a continuous carrier type vertical heating furnace where the drainage of binders generated from objects to be heat-treated stored or placed in objects to be carried is satisfactory, and the generation of the breakage of the object to be carried located in the bottom is suppressed.SOLUTION: A vertical heating furnace comprises an electron control device 20 imparting reciprocating motion in an approach and separation direction and in a longitudinal direction to a pair of second rack members 18a and a pair of first rack members 18b in such a manner that plural objects W to be carried are fed one by one to un upper direction or a lower direction while supporting them in a state of being separated to upper and lower directions at fixed intervals, thus the plural objects W to be carried can be fed one by one to the upper direction or the lower direction while supporting them in a state of being separated to upper and lower directions at fixed intervals. In this way, the drainage of binders generated from the objects to be heat-treated placed or stored in the objects W to be carried is satisfactory, and the breakage of the object to be carried located in the bottom is suppressed.SELECTED DRAWING: Figure 1

Description

The present invention relates to a vertical heating furnace capable of continuously or intermittently transporting an object to be transported in the vertical direction.

As a continuous transport type heating furnace that heat-treats the transported object in the process of continuously transporting the transported object through the heating furnace, a roller transport type using a plurality of transport rollers arranged in parallel in the horizontal direction. A heating furnace and a mesh belt type heating furnace using an endless annular mesh belt have been proposed. Since the furnace length of these roller transport type heating furnaces and mesh belt type heating furnaces is determined by the length of the object to be transported, the heat treatment time, and the treatment capacity, it is difficult to reduce the size in the horizontal direction, and the installation area is large in the factory. Was needed.

On the other hand, in Patent Documents 1, 2 and 3, for example, vertical heating in which the objects to be transported, which are called saggars or sheaths for accommodating the objects to be heat-treated, are stacked and transported one by one in the vertical direction. Each furnace has been proposed. In such a vertical heating furnace, the furnace length determined by the thickness of the object to be transported, the heat treatment time, and the treatment capacity is in the vertical direction, so it is necessary to secure a large installation area without increasing the size so much in the horizontal direction. There is a feature that there is no.

Japanese Unexamined Patent Publication No. 01-174889 Japanese Unexamined Patent Publication No. 08-054190 Japanese Unexamined Patent Publication No. 09-079762

However, the vertical heating furnaces described in Patent Documents 1, 2 and 3 heat the objects to be transported in the process of vertically transporting the objects to be transported one by one in a stacked state, and thus accommodate the objects to be transported. Efficient heat treatment could not be performed due to poor removal of the binder generated from the heat-treated object placed or placed. In addition, the load of the object to be transported above it, the gripping force from the chuck device that supports the object to be transported located at the bottom, etc. Since the load of the above is applied, there is a problem that the object to be transported located at the lowest stage is easily damaged.

The present invention has been made in the background of the above circumstances, and the object thereof is that the binder generated from the heat-treated object housed or placed on the object to be transported is easily removed and is located at the lowest stage. It is an object of the present invention to provide a vertical heating furnace in which the occurrence of damage to the transported object is suppressed.

As a result of various studies to solve the above problems, the present inventor has set a certain interval between a plurality of longitudinal feed support members provided around the object to be transported in the vertical furnace body. A support protrusion is provided to support the outer peripheral portion of the object to be transported while being separated in the vertical direction, and the reciprocating motion in the approaching separation direction and the reciprocating motion in the vertical direction, the reciprocating motion in the vertical direction, and the vertical motion are provided between the plurality of feed support members. When a reciprocating rotational motion around the axis in the direction or a rotational motion around the axis in the vertical direction is applied, a plurality of objects to be transported are supported in a state of being separated in the vertical direction at a certain interval and are supported in the upward or downward direction. I found that I could send them one by one. The present invention has been made based on the findings.

That is, the gist of the present invention is (a) a furnace body in which a vertical space inside the furnace for accommodating the transported object is formed, and the transported object is vertically oriented in the space inside the furnace. It is a vertical heating furnace that can be transported to, and (b) a plurality of vertically longitudinal feed support members provided around the object to be transported in the furnace body, and (c) the plurality of feed support members. A plurality of support protrusions that protrude from each of the feed support members and support the outer peripheral portion of the object to be transported with a certain interval in the vertical direction, and (d) a plurality of objects to be transported at a constant interval. Reciprocating motion in the approaching separation direction, reciprocating motion in the vertical direction, reciprocating motion in the vertical direction, and reciprocating rotation around the axis in the vertical direction so as to send one by one in the upward or downward direction while supporting the state separated in the vertical direction. The present invention includes a feed drive control device that applies motion or rotational motion around an axis in the vertical direction between the plurality of feed support members.

According to the vertical heating furnace of the present invention, a plurality of vertically longitudinal feed support members provided around the object to be transported in the furnace body and a plurality of feed support members protruding from the plurality of feed support members, respectively. While supporting a plurality of support protrusions that support the outer peripheral portion of the object to be transported with a certain interval in the vertical direction and a plurality of support protrusions that support the plurality of objects to be transported with a certain interval in the vertical direction. Reciprocating motion in the approaching and separating directions and reciprocating motion in the vertical direction, reciprocating motion in the vertical direction and reciprocating rotational motion around the vertical axis, or reciprocating rotational motion around the vertical axis so as to send one by one in the upward or downward direction. Since it includes a feed drive control device that applies a rotational motion between the plurality of feed support members, it supports a plurality of objects to be transported in a state of being separated in a certain interval in the vertical direction and upward or upward. It can be sent one by one in the downward direction. As a result, the binder generated from the heat-treated material placed or contained in the transported object can be easily removed, and the occurrence of damage to the transported object located at the bottom stage can be suppressed.

Here, preferably, the transported object has a rectangular plate shape, and the plurality of feed support members are located on the outside of two sides parallel to each other of the transported object so as to sandwich the transported object. It is a pair of rack members, and a plurality of support teeth are formed at equal intervals in the longitudinal direction of the two pairs of rack members as the plurality of support protrusions on the facing surfaces of the two pairs of rack members. In the feed drive control device, the pair of second rack members of the two pairs of rack members are separated from each other, and the plurality of support teeth formed on the pair of second rack members are removed from the object to be transported. The longitudinal direction is set in a non-supported state, and the pair of first rack members of the two pairs of rack members are supported by the plurality of supporting teeth formed on the pair of first rack members to support the object to be transported. After moving the object to be transported by one step (one stroke) by feeding in the direction, the pair of second rack members are brought close to each other to be in a supported state to support the object to be transported, and then the pair. The first rack members are separated from each other and returned in the longitudinal direction for one step in a non-supported state, and the pair of first rack members are brought close to each other to support the transported object. By repeating the state, the objects to be transported are sent one by one at regular intervals in the longitudinal direction. As a result, a plurality of objects to be transported can be supported one by one in the upward or downward direction while being supported at a certain interval in the vertical direction, and the heat treatment placed or contained in the objects to be transported can be performed. The binder generated from the object is easily removed, and the occurrence of damage to the object to be transported located at the bottom is suppressed.

Further, preferably, the pair of first rack members and the pair of second rack members are respectively located on the outside of the two parallel sides of the transported object so as to sandwich the transported object. Includes at least a pair of guide members located on the outside of the other two parallel sides of the object to be transported, sandwiching the object to be transported. As a result, the object to be transported is guided upward or downward by the pair of rack members while being guided by the pair of guide members located outside the other two parallel sides, so that the object to be transported is said to be the object to be transported. The other two parallel sides are prevented from falling off in the outward direction.

Further, preferably, the transported object has a rectangular plate shape in which concave notches are formed at four corners, and the plurality of feed support members are located so as to be sandwiched diagonally in the diagonal direction of the transported object. The two pairs of feed support shafts are positioned so as to be engaged with the concave notch regardless of the rotation angle around the central axis of each of the two pairs of feed support shafts. A fan-shaped support that is formed at equal intervals in the longitudinal direction of the two pairs of feed support shafts and a convex positioning portion that positions the object to be transported, and supports the four corners of the object to be transported according to the rotation angle around the central axis. Each of the plates is provided, and the feed drive control device rotates a pair of second feed support shafts located on the diagonal line of the object to be transported around the central axis of the two pairs of feed support shafts. The transported object is placed in a non-supported state, and the pair of the first feed support shafts of the two pairs of feed support shafts is fed in the longitudinal direction to move the transported object by one step, and then the pair. The second feed support shaft of No. 1 is rotated around the central axis to support the object to be transported, and then the pair of first feed support shafts are rotated around the central axis to unsupport the object to be transported. After the state is set, it is returned to the longitudinal direction for one step, and the pair of first feed support shafts are rotated around the central axis to put the transported object in the supported state, whereby the transported object is brought into the longitudinal direction. Send one by one at regular intervals. As a result, a plurality of objects to be transported can be supported one by one in the upward or downward direction while being supported at a certain interval in the vertical direction, and the heat treatment placed or contained in the objects to be transported can be performed. The binder generated from the object is easily removed, and the occurrence of damage to the object to be transported located at the bottom is suppressed. In addition, the feed support shaft is provided with convex positioning portions that engage the transported object with concave notches at the four corners to position the transported object regardless of the rotation angle position around the central axis of the feed support shaft. Therefore, there is no need for a guide member that guides the object to be transported in the vertical direction.

Further, preferably, the feed drive control device rotates the pair of second feed support shafts around the central axis to change the support state from the non-support state to the support state, and then performs the pair of first feed support shafts. Prior to moving the pair of second feed support shafts by a predetermined distance to the side opposite to the feed direction and rotating the pair of first feed support shafts around the central axis to change from the non-support state to the support state, the above-mentioned The pair of second feed support shafts is moved by a predetermined distance to the side opposite to the feed direction of the pair of first feed support shafts. As a result, even if the fan-shaped support plate formed on the feed support shaft does not have an inclined surface for attracting the object to be transported, interference between the fan-shaped support plate of the feed support shaft and the object to be transported is prevented.

Further, preferably, the transported object has a rectangular plate shape, and the plurality of feed support members are located on the outer sides of two sides parallel to each other of the transported object, respectively. The four feed support shafts are provided with a plurality of support plates that support the two parallel sides as the plurality of support protrusions on the four feed support shafts. The plurality of support plates are formed at equal intervals in the direction, and the plurality of support plates are formed on the feed support member at equal intervals in the longitudinal direction, and the rotation angles of the four feed support shafts around the eccentric axis of each of the four feed support shafts. The support state that engages with the two parallel sides is switched to the non-support state, and the feed drive control device has two feed supports located outside the two parallel sides. Of the shafts, a pair of second feed support shafts located on a line passing through the center of the transported object is rotated around an eccentric axis to put the transported object in an unsupported state, and the four feed support shafts By feeding the pair of first feed support shafts in the longitudinal direction, the object to be transported is moved by one step, and then the pair of second feed support shafts are rotated around the eccentric axis to carry the object to be transported. The object is put into a supported state, and then the pair of first feed support shafts are rotated around the eccentric axis to bring the object to be unsupported into a non-supported state, and then returned to the longitudinal direction for one step, and the pair of first supports. By rotating the feed support shaft around the eccentric axis to support the object to be transported, the objects to be transported are fed one by one with a certain interval in the longitudinal direction. As a result, a plurality of objects to be transported can be supported one by one in the upward or downward direction while being supported at a certain interval in the vertical direction, and the heat treatment placed or contained in the objects to be transported can be performed. The binder generated from the object is easily removed, and the occurrence of damage to the object to be transported located at the bottom is suppressed.

Further, preferably, the feed drive control device rotates the pair of second feed support shafts around an eccentric axis to change from a non-supported state to a supported state, and then the pair of first feed support shafts. Is moved by a predetermined distance to the side opposite to the feed direction of the pair of second feed support shafts, and the pair of first feed support shafts are rotated around the eccentric axis to change from the non-support state to the support state. The pair of second feed support shafts is moved by a predetermined distance to the side opposite to the feed direction of the pair of first feed support shafts. As a result, interference between the support plate of the feed support shaft and the object to be transported is prevented even if the support plate formed on the feed support shaft does not have an inclined surface for attracting the object to be transported.

Further, preferably, the transported object is guided by the other two parallel sides of the transported object being slidably contacted with a guide member provided at a fixed position in parallel with the four feed support shafts. To. As a result, the object to be transported is guided upward or downward by the four feed support shafts while being guided by the other guide members located outside the two parallel sides of the object to be transported. The other two parallel sides of the above are prevented from falling off in the outward direction.

Further, preferably, the object to be transported has a rectangular plate shape, and the plurality of feed support members are four feed rack shafts forming two pairs located so as to sandwich the object to be transported diagonally. The four feed rack shafts are formed with a plurality of support teeth as a plurality of support protrusions for supporting the object to be transported at equal intervals in the longitudinal direction of the four feed rack shafts. The plurality of supporting teeth are engaged with one of the four sides of the object to be transported from a supported state to a non-supported state according to the rotation angle around the eccentric rotation axis of each of the four feed rack shafts. Each of them is switched, and the feed drive control device rotates a pair of second feed rack shafts out of the four feed rack shafts around an eccentric rotation axis to put the transported object in an unsupported state. By feeding the pair of first feed rack shafts out of the four feed rack shafts in the longitudinal direction, the object to be transported is moved by one step, and then the pair of second feed rack shafts are eccentric. After rotating around the moving axis to put the transported object in the supported state, and then rotating the pair of first feed rack axes around the eccentric rotation axis to put the transported object in the unsupported state. By returning the material to be transported in the longitudinal direction for one step, the objects to be transported are fed one by one in the longitudinal direction at regular intervals. As a result, a plurality of objects to be transported can be supported one by one in the upward or downward direction while being supported at a certain interval in the vertical direction, and the heat treatment placed or contained in the objects to be transported can be performed. The binder generated from the object is easily removed, and the occurrence of damage to the object to be transported located at the bottom is suppressed. Further, the feed rack shaft located diagonally sandwiching the object to be transported is provided with support teeth that engage and support one of the four sides, and the support teeth of the pair of second feed rack shafts are covered. The transported object is positioned at the center by repeating the state of engaging with the two sides of the transported object and the state of engaging the support teeth of the pair of first feed rack shafts with the other two sides of the transported object. Therefore, a guide member for guiding the object to be transported in the vertical direction becomes unnecessary.

Further, preferably, the transported object has a rectangular plate shape with notches formed at four corners, and the plurality of feed support members are diagonal lines of the transported object outside the four corners of the transported object. There are four feed support screw shafts located above, and spiral ridges of a constant pitch are formed on the four feed support screw shafts as a plurality of support protrusions for supporting the four corners of the object to be transported. The feed drive control device continuously or intermittently rotationally drives the four feed support screw shafts around the shaft to drive the conveyed object to the four feed support screw shafts. Send one by one with a certain interval in the longitudinal direction. As a result, a plurality of objects to be transported can be supported one by one in the upward or downward direction while being supported at a certain interval in the vertical direction, and the heat treatment placed or contained in the objects to be transported can be performed. The binder generated from the object is easily removed, and the occurrence of damage to the object to be transported located at the bottom is suppressed.

It is a vertical sectional view which shows the vertical heating furnace of one Example of this invention. It is a horizontal sectional view of the vertical heating furnace of FIG. 1, and is the sectional view of II-II of FIG. It is a top view which shows the vertical heating furnace of FIG. It is an enlarged view of the main part which shows the main part of the vertical heating furnace of FIG. 1 in an enlarged manner. It is a time chart explaining the operation of the vertical heating furnace of FIG. It is a vertical sectional view which shows the vertical heating furnace of another Example of this invention. 6 is a vertical cross-sectional view of the vertical heating furnace of FIG. 6 orthogonal to the cross section of FIG. 6 including the center line. It is a horizontal sectional view of the vertical heating furnace of FIG. 6, and is the sectional view of VIII-VIII of FIG. It is a time chart explaining the operation example of the vertical heating furnace of FIG. It is a time chart explaining another operation example of the vertical heating furnace of FIG. It is a top view explaining the relationship between the object to be conveyed, and the support feed member in the vertical heating furnace of still another Example of this invention. 11 is a vertical cross-sectional view of XII-XII of FIG. 11 for explaining the relationship between the transported object and the support feed member in the vertical heating furnace of FIG. 11. 11 is a horizontal cross-sectional view showing the relationship between the transported object and the rotation position of the feed support member in the vertical heating furnace of FIG. 11, and is a diagram showing a support state of the feed support member. FIG. 11 is a horizontal cross-sectional view showing the relationship between the rotational position of the object to be transported and the feed support member in the vertical heating furnace of FIG. 11, and is a diagram showing a state between the supported state and the non-supported state of the feed support member. .. 11 is a horizontal cross-sectional view showing the relationship between the transported object and the rotation position of the feed support member in the vertical heating furnace of FIG. 11, and is a diagram showing a non-support state of the feed support member. It is a time chart explaining the operation example of the vertical heating furnace of FIG. It is a time chart explaining another operation example of the vertical heating furnace of FIG. It is a top view explaining the relationship between the object to be conveyed, and the support feed member in the vertical heating furnace of still another Example of this invention. FIG. 18 is a vertical cross-sectional view of XIX-XIX of FIG. 18 for explaining the relationship between the transported object and the support feed member in the vertical heating furnace of FIG. FIG. 18 is a right side view of FIG. 18 for explaining the relationship between the transported object and the support feed member in the vertical heating furnace of FIG. It is a time chart explaining the operation example of the vertical heating furnace of FIG. It is a vertical sectional view which shows the vertical heating furnace of still another Example of this invention. It is a horizontal sectional view of the vertical heating furnace of FIG. It is a figure explaining the support state of the non-heated material by the feed support screw shaft in the vertical heating furnace of FIG. It is an enlarged view explaining the support state of the non-heated material by the feed support screw shaft in the vertical heating furnace of FIG. 22 in an enlarged manner.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the following examples, the drawings explain the main parts related to the invention, and the dimensions, shapes, and the like are not always drawn accurately.

FIG. 1 shows a vertical cross section of a vertical heating furnace 10 which is a continuous transfer type according to an embodiment of the present invention. FIG. 2 is a horizontal sectional view of the vertical heating furnace 10. FIG. 3 is a plan view of the vertical heating furnace 10. FIG. 4 is an enlarged view showing the support state of the object to be conveyed by the feed support member, and is an enlarged view of the portion A1 surrounded by the broken line circle in FIG. Further, FIG. 1 is a cross-sectional view taken along the line II of FIG. In FIGS. 1 to 3, a loading device for charging the transported object W into the transport inlet, an unloading device for taking out the transported object W from the transport outlet, and an exhaust gas in the furnace body 14 by supplying gas into the furnace body 14. The gas supply / exhaust device and the like to be discharged are omitted.

The vertical heating furnace 10 has a machine frame (frame) 12 and a furnace body 14 in which a longitudinal space S in the furnace body is formed in the vertical direction, that is, in the vertical (vertical) direction of FIG. 1 for accommodating the transported object W. The vertical transport mechanism 16 for horizontally supporting the object W to be transported one by one in the upward or downward direction while horizontally separating the objects W in the vertical direction, and the vertical transport mechanism 16 are driven and controlled. It has a feed electronic control device 20 and the like.

The object W to be transported is, for example, a rectangular plate made of a ceramic plate having dimensions of about 150 to 250 mm □ × 2 to 3 mm (thickness), to be exact, a square plate, for example, a ceramic molded body in which ceramic sheets are laminated. A single or a plurality of objects to be heated such as the above are placed on the object W to be transported.

The furnace body 14 is composed of a heat insulating material such as ceramic fiber, and is supported by a machine frame 12 on the inner wall surfaces of the longitudinal side walls 14a, 14b, 14c, 14d and the side walls 14a, 14b, 14c, 14d, respectively. It is provided with a fixed heater H and is formed in a square cross section. As shown in FIG. 2, the furnace body space S is formed by being surrounded by the side walls 14a, 14b, 14c, and 14d. As shown in FIG. 1, the upper end portion and the lower end portion of the furnace body 14 are closed by the upper shield plate 34 and the lower shield plate 36 fixed to the machine frame 12.

The upper end portions of the pair of first rack members 18a and the upper end portions of the pair of second rack members 18b are projected upward to the outside of the furnace body 14 through the elongated holes 38 formed in the upper shielding plate 34. Further, the lower end portions of the pair of first rack members 18a and the lower end portions of the pair of second rack members 18b are projected downward to the outside of the furnace body 14 through the elongated holes 38 formed in the lower shielding plate 36. .. The elongated hole 38 is set to a size that does not interfere with the horizontal movement of the upper end portion and the lower end portion of the pair of first rack members 18a and the upper end portion and the lower end portion of the pair of second rack members 18b.

The vertical transfer mechanism 16 includes two pairs (four in total) of rack members, that is, a pair of first rack members 18a and a pair of second rack members 18b, two sets of upper and lower pairs of first horizontal actuators 22a, and two sets. A pair of upper and lower second horizontal actuators 22b, two pairs of first vertical actuators 24a, and two pairs of second vertical actuators 24b are provided. As shown in FIGS. 2 and 3, the pair of first rack members 18a and the pair of second rack members 18b are positioned so as to sandwich the transported object W on the outside of the two sides of the transported object W in the furnace body 14. Moreover, it is provided so as to be located on a line passing through the center of the object to be transported W, and both ends are long in the vertical direction protruding from the furnace body 14.

As shown in FIG. 1, two sets of upper and lower pairs of first horizontal actuators 22a are connected to the upper end and the lower end of the pair of first rack members 18a, respectively, and the respective ends are horizontally synchronized in the horizontal direction. Each has an output rod 28a for moving in the (horizontal) direction. The two sets of upper and lower pairs of second horizontal actuators 22b are connected to the upper end and the lower end of the pair of second rack members 18b, respectively, and the output rods 28b move each end in the horizontal (horizontal) direction in synchronization with each other. Each has.

The two pairs of first vertical actuators 24a move two pairs of upper and lower pairs of first horizontal actuators 22a in synchronization with each other in the vertical direction. The two pairs of second vertical actuators 24b move two pairs of upper and lower pairs of second horizontal actuators 22b in synchronization with each other in the vertical direction. Two sets of upper and lower pairs of first vertical actuators 24a and two sets of upper and lower pairs of second vertical actuators 24b are supported by the machine frame 12.

The first horizontal actuator 22a, the second horizontal actuator 22b, the first vertical actuator 24a, and the second vertical actuator 24b are, for example, an electrically driven motor cylinder, a pneumatic cylinder driven by compressed air, water, and oil. It is composed of a hydraulic cylinder or the like driven by the hydraulic pressure of the above.

As shown in FIG. 2, the pair of first rack members 18a and the pair of second rack members 18b are located on the outside of two sides parallel to each other of the transported object W with the center of the transported object W interposed therebetween. ing. The two pairs of first horizontal actuators 22a are in a supported state in which the pair of first rack members 18a are brought close to each other to support the object to be conveyed W, or the pair of first rack members 18a are separated from each other and covered. It is in a non-supported state in which the conveyed object W is not supported. Similarly, the two pairs of second horizontal actuators 22b bring the pair of second rack members 18b close to each other to support the object W to be transported, or separate the pair of second rack members 18b from each other. It is set to a non-supported state in which the transported object W is not supported.

The two pairs of first vertical actuators 24a simultaneously drive the pair of first rack members 18a up and down, and the thickness of the object to be transported W when the pair of first rack members 18a are in the supported state. A predetermined stroke amount sufficiently larger than that, for example, a predetermined feed amount of about 10 to 20 mm is increased to convey the object W to be conveyed by one stroke (that is, one step), and the pair of first rack members 18a are in a non-supported state. When it is said, it is lowered by a predetermined stroke amount and returned to the original position.

The two pairs of second vertical actuators 24b simultaneously drive the pair of second rack members 18b up and down in synchronization with each other, and raise the pair of second rack members 18b by a predetermined stroke amount when the pair of second rack members 18b are in the supported state. The object W to be conveyed can be conveyed by one stroke, and when the pair of second rack members 18b are in the non-supported state, the object W can be lowered by a predetermined stroke amount and returned to the original position. In the operation example shown in FIG. 5 to be described later, since the two pairs of the second vertical actuators 24b are not operated, they may not be provided.

On the facing surface of the pair of first rack members 18a and the pair of second rack members 18b, that is, the surface on the side of the object to be transported, the outer peripheral portion of the object to be transported W is spaced so as to protrude toward the object W to be transported. As shown in FIG. 4, the support teeth 26 that support the teeth 26 in a vertically separated state are formed at a constant equal pitch that is sufficiently larger than the thickness of the object to be transported W in the longitudinal direction. The support teeth 26 have horizontal tooth streaks, and an inclined surface L is formed so that the tooth width becomes smaller toward the tip, and a pair of first rack members 18a or a pair of second rack members 18b are formed. When the object to be transported W is brought close to the object to be transported, interference between the support teeth 26 and the object to be transported W is prevented, and the outer peripheral portion of the object to be transported W is smoothly supported by the support teeth 26. ..

The inclined surface L prevents interference between the support teeth 26 and the transported object W when the support teeth 26 of the first rack member 18a and the transported object W are brought close to each other, for example, in order to support the transported object W. Functions as an attraction surface. In this embodiment, the first rack member 18a and the second rack member 18b function as feed support members, and the support teeth 26 function as support protrusions. Note that FIG. 4 shows a fork 30 for sending the transported object W of the unloading device (not shown) out of the furnace.

In the vertical heating furnace 10 of this embodiment, as shown in FIG. 2, the pair of first rack members 18a and the pair of second rack members 18b are in the front-rear direction of the two parallel sides of the object W to be transported. The objects to be transported W are positioned on the outside of the two sides of the above. Therefore, the position of the object to be transported W in the left-right direction is restricted by the pair of first rack members 18a and the pair of second rack members 18b.

To regulate the position in the front-rear direction by guiding the transported object W to the other two sides on the outside of the other two sides of the two parallel sides of the transported object W in the left-right direction. In addition, at a position close to the other two sides, a pair of vertically longitudinal guide members parallel to the pair of first rack members 18a and the pair of second rack members 18b, that is, a pair of guide members 32a and The pair of guide members 32b are fixed in position by being fixed to the machine frame 12 at positions close to the other two sides of the object to be conveyed W. As for the two pairs of guide members 32a and 32b, at least a pair may be provided.

In the vertical transfer mechanism 16, the pair of first rack members 18a and the pair of second rack members 18b are moved in the longitudinal direction, that is, in the vertical direction and in the horizontal direction, respectively, by the electronic control device 20 of FIG. It can be operated synchronously. The electronic control device 20 controls the operation of two pairs of first horizontal actuators 22a, two pairs of second horizontal actuators 22b, two pairs of first vertical actuators 24a, and two pairs of second vertical actuators 24b. It functions as a feed drive control device that gives a movement to feed the transported object W to the first rack member 18a and the pair of second rack members 18b.

The electronic control device 20 is composed of, for example, a microcomputer, and supports a plurality of objects W to be transported in a state of being separated in a certain interval in the vertical direction according to a control program stored in advance, and is upward or downward. Two pairs of rack members (four in total), that is, a pair of first rack members 18a and a pair It is applied to the second rack member 18b.

FIG. 5 is an example of the control operation of the electronic control device 20, and is a time chart illustrating each control operation when, for example, the transport direction is upward. As shown in FIG. 5, the electronic control device 20 is in a supported state in which the pair of second rack members 18b and the pair of first rack members 18a each support the object to be transported W (at the time of t0). Next, the pair of second rack members 18b are separated from each other, and the support teeth 26 formed on the pair of second rack members 18b are removed from the transported object W to be in a non-supported state (at the time of t1).

Next, the pair of first rack members 18a are moved in the longitudinal direction, that is, by feeding a predetermined amount upward in a supported state supporting the transported object W, thereby moving the transported object W by one stroke (one step) (at the time of t2). After that, the pair of second rack members 18b are brought close to each other to support the transported object W (at the time of t3).

Next, the pair of first rack members 18a are separated from each other to be in a non-supported state in which the support teeth 26 are removed from the transported object W (at the time of t4). From this state, the pair of first rack members 18a are returned in the longitudinal direction, that is, downward by one stroke (at the time of t5), and the pair of first rack members 18a are brought close to each other to support the transported object W (the support state). (At t6).

By repeating such an operation of one cycle, the electronic control device 20 sequentially sends the objects to be conveyed upward one by one with a certain interval in the vertical direction. At the same time, the electronic control device 20 supplies the transported object W one by one from a loading device (not shown) to the transport inlet on the lower side of the vertical heating furnace 10, and an unloading device (not shown) is used to supply the vertical heating furnace 10 to the transport inlet. The objects to be transported W are taken out one by one from the transfer outlet on the upper side.

As described above, according to the vertical heating furnace 10 of the present embodiment, a pair of first rack members located on the outside of two sides parallel to each other of the transported object W with the transported object W sandwiched in a plan view. It has a pair of second rack members 18b and 18a, and a plurality of support teeth 26 are formed at equal intervals in the longitudinal direction on their respective facing surfaces of the first rack member 18a and the second rack member 18b. There is. In the electronic control device 20, the pair of second rack members 18b are separated from each other from the supported state in which the pair of second rack members 18b and the pair of first rack members 18a each support the object W to be conveyed, and the pair of them is separated from each other. The support teeth 26 formed on the second rack member 18b are placed in a non-supported state by removing them from the transported object W, and the pair of first rack members 18a are supported by the transported object W in a predetermined amount in the longitudinal direction, that is, upward. By feeding, the object W to be transported is moved by one stroke. After that, the electronic control device 20 brings the pair of second rack members 18b close to each other to support the transported object W, and then separates the other pair of first rack members 18a from each other to support the transported object W. The support teeth 26 are removed from W to be in a non-supported state, and in this state, the pair of first rack members 18a are brought close to each other in the longitudinal direction, that is, downward for one stroke, to be in a supported state in which the transported object W is supported. By repeatedly executing this transport cycle, it is possible to feed a plurality of objects W to be transported one by one in the upward or downward direction while supporting a plurality of objects W with a certain interval in the vertical direction. The binder generated from the heat-treated object placed or housed in W is easily removed, and the occurrence of damage to the transported object W located at the bottom is suppressed.

That is, according to the vertical heating furnace 10 of the present embodiment, there is a furnace body 14 in which a vertical space S in the furnace body for accommodating the transported object W is formed, and the transported object W is stored in the furnace body space. A vertical heating furnace 10 capable of transporting in the vertical direction in S, wherein a pair of first rack members 18a and a pair of first rack members 18a and a pair of first rack members 18a, which are provided around the object W to be transported in the furnace body 14 and are vertically elongated in the vertical direction. The outer peripheral portion of the object to be transported W is projected from the two rack members 18b (plural feed support members), the pair of first rack members 18a and the pair of second rack members 18b (plural feed support members), respectively. A plurality of supporting teeth (supporting protrusions) 26 that support a plurality of supporting teeth (supporting protrusions) 26 that are separated by a certain interval in the vertical direction, and a plurality of objects W that are supported upward or downward while being supported by a state that is separated by a certain interval in the vertical direction. A plurality of electronic control devices 20 for imparting reciprocating motions in the approaching / separating direction and the longitudinal direction to the pair of second rack members 18a and the pair of first rack members 18b so as to send one in each direction. Since it is possible to feed the transported object W one by one in the upward or downward direction while supporting the transported object W with a certain interval in the vertical direction, the heat-treated object placed or stored in the transported object W can be used. The generated binder is easily removed, and the occurrence of damage to the transported object located at the bottom is suppressed.

Further, according to the vertical heating furnace 10 of the present embodiment, the pair of first rack members 18a and the pair of second rack members 18b are on the same two sides of the two parallel sides of the object W to be transported. It includes two pairs of guide members 32a and 32b that are located on the outside of the transported object W with the transported object W in between, and are located on the outside of the other two sides of the transported object W with the transported object W in between. As a result, the object W to be transported is vertically fed by the pair of first rack members 18a and the pair of second rack members 18b while being guided by the pair of guide members 32a and 32b located outside the other two sides. Therefore, the transported object W is prevented from falling off from the other two sides in the outward direction.

Next, another embodiment of the present invention will be described. In the following description, the same reference numerals will be given to parts that are common to each other, such as the furnace body 14 and the actuator, and the description thereof will be omitted.

FIG. 6 is a vertical sectional view showing a vertical sectional view of the vertical heating furnace 110 of another embodiment of the present invention. FIG. 7 is a horizontal sectional view showing a horizontal sectional view of the vertical heating furnace 110. FIG. 8 is a view of VIII-VIII of FIG. 7, which is an enlarged view showing an enlarged end of a feed support shaft that supports and conveys the object W to be conveyed in the vertical heating furnace 110. FIG. 9 is a time chart showing the operation of the vertical heating furnace 110. The center line RC shown in FIG. 8 is the center line of the furnace body 14.

As shown in FIG. 7, in the vertical heating furnace 110 of this embodiment, the object W to be transported has a rectangular plate shape similar to that of the above-described embodiment, but the four corners thereof have protrusions. A concave notch 142 having a radius of curvature equal to or slightly larger than the radius of curvature of the 154a and the ridge 154b is formed.

In the vertical heating furnace 110 of this embodiment, a pair of feed support shafts 118a and a pair of feed support shafts 118a that function as a plurality of feed support members instead of the first rack member 18a and the second rack member 18b of the above-described embodiment. The second feed support shaft 118b is provided in the vertical direction around the object W to be transported in the furnace body 14. The pair of second feed support shafts 118b are arranged so as to sandwich the object W to be transported on the diagonal line of the object W to be transported, and the pair of first feed support shafts 118a are arranged on the other diagonal lines of the object W to be transported. It is arranged across.

As shown in FIG. 8, the pair of first feed support shafts 118a has a columnar portion 144a made of a heat-resistant material such as semi-cylindrical ceramics, a heat-resistant metal, and carbon, and a columnar portion 144a in the direction of the central axis CLa. A shaft end portion 146a having a diameter relatively smaller than that of the columnar portion 144a protruding vertically is provided. The pair of second feed support shafts 118b includes a columnar portion 144b made of a heat-resistant material such as semi-cylindrical ceramics, heat-resistant metal, and carbon, and a columnar portion 144b protruding vertically in the direction of the central axis CLb of the columnar portion 144b. A shaft end portion 146b having a relatively smaller diameter is provided. In this embodiment, two pairs of first horizontal actuators 22a and two pairs of second horizontal actuators 22b are not provided.

As shown in FIG. 6, the upper shield plate 34 and the lower shield plate 36 are formed with holes 138 having a diameter slightly larger than those of the shaft end portions 146a and 146b, respectively. At the inner end of the output member 128a of the two pairs of first vertical actuators 24a, a shaft end portion 146a protruding upward from the first feed support shaft 118a through a hole 138 formed in the upper shielding plate 34, and a lower shielding plate. A pair of rotary actuators 148a, which are connected to each of the shaft end portions 146a protruding downward through the holes 138 formed in 36 and rotate in synchronization with each other, are held. The hole 138 may be closed with a sealing material such as a seal for a rotating shaft or an O-ring.

At the inner end of the output member 128b of the two pairs of second vertical actuators 24b, a shaft end portion 146b protruding upward from the second feed support shaft 118b through a hole 138 formed in the upper shielding plate 34, and a lower shielding plate. A pair of rotary actuators 148b, which are connected to each of the shaft end portions 146b protruding downward through the holes 138 formed in 36 and rotate in synchronization with each other, are held.

As shown in FIG. 7, the pair of first feed support shafts 118a, which are basically formed in a semi-cylindrical shape, have a convex surface 150a in a range of 180 ° around the central axis CLa and a flat surface 152a, and are flat. At the center of the surface 152a in the width direction, a ridge 154a having a radius of curvature about half that of the convex surface 150a around the central axis CLa is formed. The radius of curvature of the ridge 154a is set to be equal to or slightly smaller than the radius of curvature of the concave notch 142.

Similarly, a pair of second feed support shafts 118b, which are basically formed in a semi-cylindrical shape, include a convex surface 150b in a range of 180 ° around the central axis CLb and a flat surface 152b, and have a width of the flat surface 152b. At the center of the direction, a ridge 154b having a radius of curvature about half that of the convex surface 150b around the central axis CLa is formed. The radius of curvature of the ridge 154b is set to be equal to or slightly smaller than the radius of curvature of the concave notch 142. The ridges 154a and 154b function as convex positioning portions for horizontally positioning the object to be transported W.

Of the flat surfaces 152a formed on the columnar portions 144a of the pair of first feed support shafts 118a, the surface on the right side of the central axis CLa toward the flat surface 152a has a center angle of 90 ° around the central axis CLa. A plurality of fan-shaped support plates 126a having a structure are provided so as to be equidistant in the longitudinal direction of the first feed support shaft 118a and with a gap sufficiently larger than the thickness of the object to be transported W. Similarly, of the flat surfaces 152b formed on the columnar portion 144a of the pair of second feed support shafts 118b, the surface on the left side of the central axis CLb toward the flat surface 152a is 90 ° around the central axis CLb. A plurality of fan-shaped support plates 126b having a central angle of the above are projected so as to be evenly spaced in the longitudinal direction of the first feed support shaft 118b and with a gap sufficiently larger than the thickness of the object to be transported W. The fan-shaped support plates 126a and 126b function as support protrusions for supporting the object to be transported W.

The pair of rotary actuators 148a rotate the pair of first feed support shafts 118a by 90 ° clockwise or 90 ° counterclockwise in FIG. 7 around the central axis CLa of the pair of first feed support shafts 118a. A non-supported state in which the fan-shaped support plate 126a does not support the transported object W, or a supported state in which the fan-shaped support plate 126a has entered the lower side of the transported object W.

Similarly, the pair of rotary actuators 148b is rotated 90 ° clockwise or 90 ° counterclockwise in FIG. 7 about the central axis CLb of the pair of second feed support shafts 118b to support the pair of second feeds. The shaft 118b is in a non-supported state in which the fan-shaped support plate 126b does not support the transported object W, or in a supported state in which the fan-shaped support plate 126b has entered the lower side of the transported object W.

Returning to FIG. 6, the two pairs of the first vertical actuators 24a simultaneously drive the first feed support shaft 118a up and down in synchronization with each other, and when the first feed support shaft 118a is in the support state, the object to be transported The object W to be transported is transported by a predetermined stroke amount sufficiently larger than the thickness of W, and is moved by a predetermined stroke amount when the first feed support shaft 118a is in the non-supported state. Return to position.

Similarly, the two pairs of the second vertical actuators 24b synchronously drive the second feed support shaft 118b up and down, and when the second feed support shaft 118b is in the support state, the conveyed object W When the feed amount sufficiently larger than the thickness is increased by a predetermined feed amount of, for example, about 10 to 20 mm to transport the object W to be transported by one stroke, and the second feed support shaft 118b is in the unsupported state. It can be lowered by a predetermined stroke and returned to its original position. In the operation example shown in FIG. 9 to be described later, the two pairs of the second vertical actuators 24b are not operated, and therefore may not be provided.

The vertical transfer mechanism 116 of the present embodiment includes a pair of first feed support shafts 118a, a pair of second feed support shafts 118b, two pairs of first vertical actuators 24a, and two pairs of second vertical actuators 24b. It includes two sets of upper and lower rotary actuators 148a and two sets of upper and lower rotary actuators 148b.

The electronic control device 120 shown in FIG. 6 includes two pairs of first vertical actuators 24a, two pairs of second vertical actuators 24b, two pairs of upper and lower rotary actuators 148a, and two pairs of upper and lower rotary actuators 148b. It functions as a feed drive control device that controls the operation with and gives a movement to feed the object W to the pair of first feed support shafts 118a and the pair of second feed support shafts 118b.

The electronic control device 120 is composed of, for example, a microcomputer, and supports a plurality of objects W to be transported in a state of being separated in a certain interval in the vertical direction according to a control program stored in advance, and is upward or downward. Two pairs of first vertical actuators 24a, two pairs of second vertical actuators 24b, two pairs of upper and lower rotary actuators 148a, and two pairs of upper and lower rotary actuators 148b so as to sequentially feed one in each direction. And are controlled to apply reciprocating motion in the rotation direction and the longitudinal direction to the pair of first feed support shafts 118a and the pair of second feed support shafts 118b.

FIG. 9 is an example of the control operation of the electronic control device 120, and is a time chart illustrating each control operation when the transport direction is upward, for example. In FIG. 9, in the electronic control device 120, from the support state in which the pair of second feed support shafts 118b and the pair of first feed support shafts 118a each support the object W to be transported, that is, from the original position of the feed cycle (at the time of t0). , The pair of second feed support shafts 118b is rotated around the central axis CLb, and the fan-shaped support plate 126a formed on the pair of second feed support shafts 118b is removed from the transported object W to be in a non-supported state. (At t1).

After that, the pair of first feed support shafts 118a are fed in the longitudinal direction, that is, upward by a predetermined amount in the supported state in which the object W is supported, so that the object W to be transported is moved by one stroke (at the time of t2), and the pair of first feed supports. 2 The feed support shaft 118b is rotated around the central axis CLb to support the transported object W (at the time of t3).

Next, another pair of first feed support shafts 118a are rotated around the central axis CLa to bring the fan-shaped support plate 126a removed from the object to be transported W (at the time of t4), and in this state, the length is one stroke. Return to the direction, that is, downward (at t5), and rotate the other pair of first feed support shafts 118a around the central axis CLa to support the transported object W and set it as the original position of the feed cycle (at t6). ).

By repeating such an operation of one cycle, the electronic control device 120 sequentially sends the objects to be conveyed upward one by one with a certain interval in the vertical direction. At the same time, the electronic control device 120 supplies the transported object W one by one from a loading device (not shown) to the transport inlet on the lower side of the vertical heating furnace 110, and an unloading device (not shown) is used to supply the vertical heating furnace 110. The objects to be transported W are taken out one by one from the transfer outlet on the upper side.

FIG. 10 is a time chart showing another control operation example of the electronic control device 120. In another control operation example, for example, in addition to the operation shown in FIG. 9, the pair of second feed support shafts 118b are rotated around the central axis CLb so that the fan-shaped support plates 126a and 126b and the object W to be transported do not interfere with each other. Prior to the change from the non-support position to the support position, the pair of first feed support shafts 118a are moved by a predetermined distance to the side opposite to the feed direction of the pair of second feed support shafts 118b. Further, prior to rotating the pair of first feed support shafts 118a around the central axis CLa axis to move from the non-support position to the support position, the pair of second feed support shafts 118b is attached to the pair of first feed support shafts 118a. It can be moved by a predetermined distance to the side opposite to the feed direction.

In FIG. 10, in the electronic control device 120, the transported object W is supported by the pair of second feed support shafts 118b, and the fan-shaped support plate 126a of the pair of first feed support shafts 118a is predetermined under the transported object W. A gap, for example, is inserted at a distance of 3 mm to set the original position of the feed cycle (position of -3 mm in FIG. 10) (at t0). Next, the pair of first feed support shafts 118a in the supported state that support the object W to be transported are raised (floated) by a predetermined floating amount, for example, 6 mm (at the time of t1). After that, the pair of second feed support shafts 118b is rotated around the central axis CLb, and the fan-shaped support plates 126a formed on the pair of second feed support shafts 118b are removed from the transported object W to be in a non-supported state. (At t2).

Next, the transported object W is moved by one stroke by feeding a predetermined amount, for example, 12 mm in the longitudinal direction, that is, upward in the supported state in which the pair of first feed support shafts 118a supports the transported object W (at the time of t3). Next, the pair of second feed support shafts 118b is lowered by a predetermined sinking amount, for example, 3 mm (at the time of t4). After that, the pair of second feed support shafts 118b are rotated around the central axis CLb, and the fan-shaped support plate 126b is inserted under the object to be transported W (at the time of t5).

Next, the pair of second feed support shafts 118b is raised by a predetermined lifting amount, for example, 6 mm to bring the transported object W into a supported state (at t6). Next, the pair of first feed support shafts 118a is rotated around the central axis CLa to bring the fan-shaped support plate 126a out of the object W to be transported (at the time of t7). In this state, the pair of first feed support shafts 118a are returned in the longitudinal direction, that is, downward by one stroke, for example, 18 mm (at the time of t8).

Next, the pair of first feed support shafts 118a is rotated around the central axis CLa, and the fan-shaped support plate 126a is inserted under the object to be transported W (at the time of t9). Then, the other pair of first feed support shafts 118a are lowered to the in-situ position by a predetermined amount, for example, 3 mm to obtain the in-situ position of the feed cycle (at the time of t10).

By repeating the operation of such a feed cycle, the electronic control device 120 sequentially feeds the objects to be conveyed upward one by one with a certain interval in the vertical direction. At the same time, the electronic control device 120 supplies the transported object W one by one from a loading device (not shown) to the transport inlet on the lower side of the vertical heating furnace 110, and an unloading device (not shown) is used to supply the vertical heating furnace 110. The objects to be transported W are taken out one by one from the transfer outlet on the upper side.

According to the vertical heating furnace 110 of the present embodiment, the transported object W has a rectangular plate shape in which concave notches 142 are formed at the four corners, and a pair of the transported objects W are located diagonally across the transported object W. A first feed support shaft 118a and a pair of second feed support shafts 118b are provided, and the flat surfaces 152a and 152b of the first feed support shaft 118a and the second feed support shaft 118b are provided around the central axis CLa and CLb. The first feed support shaft is provided with ridges (convex positioning portions) 154a, 154b, 154c, 154d that are positioned so as to be engageable with the concave notch 142 regardless of the rotation angle position and position the object to be transported W. The flat surfaces 152a and 152b of the second feed support shaft 118a and the second feed support shaft 118b are formed at equal intervals in the longitudinal direction thereof, and support the four corners of the object to be conveyed W according to the rotation angles around the central axes CLa and CLb. It is possible to switch between a supported position and a non-supported position that does not support the four corners of the object W to be transported.

Then, the electronic control device 120 rotates the pair of feed support shafts 118b located on the diagonal line of the object to be transported around the central axis CLb, and sets the other pair of feed support shafts as non-support positions of the object to be transported W. By feeding 118a in the longitudinal direction, the transported object W is moved by one stroke, and then the pair of feed support shafts 118b are rotated around the central axis CLb axis to be the support position of the transported object W, and then the other. The pair of feed support shafts 118a are rotated around the central axis CLa axis to return to the longitudinal direction for one stroke as the non-support position of the object to be transported W, and the other pair of feed support shafts 118a are moved around the central axis CLa axis. By rotating the object to be transported W to be in a supported state, the object to be transported W is fed one by one with a certain interval in the vertical direction. By repeatedly executing this transport cycle, it is possible to feed a plurality of objects W to be transported one by one in the vertical direction while supporting them with a certain interval in the vertical direction, and the load is placed on the objects W to be transported. The binder generated from the heat-treated object placed or housed is easily removed, and the occurrence of damage to the object to be transported located at the bottom is suppressed.

According to the vertical heating furnace 110 of this embodiment, the object to be transported W is not related to the rotation angle positions of the pair of feed support shafts 118a and the center axis CLa and the center axis CLb of the pair of feed support shafts 118b. The ridges (convex positioning portions) 154a and 154b that engage with the concave notches 142 formed at the four corners of the above to position the object to be transported are the pair of feed support shafts 118a and the pair of feed support shafts. Since it is provided in 118b, a guide for guiding the object to be transported W in the vertical direction becomes unnecessary.

In the vertical heating furnace 110 of this embodiment, when the electronic control device 120 operates as shown in FIG. 10, the pair of second feed support shafts 118b is rotated around the central axis CLb to support from a non-support position. Prior to the position, the other pair of first feed support shafts 118a are moved by a predetermined distance to the side opposite to the feed direction of the pair of second feed support shafts 118b, and the other pair of first feed support shafts 118a are moved. The pair of second feed support shafts 118b is set to the side opposite to the feed direction of the other pair of first feed support shafts 118a prior to rotating the center axis around the CLa axis to move from the non-support position to the support position. Can be moved a distance. In this case, even if the fan-shaped support plates (support protrusions) 126a and 126b are not formed with an inclined surface for attracting (guided in the vertical direction) the object to be conveyed, the fan-shaped support plates 126a and 126b and the object to be conveyed are conveyed. Interference with the object W is prevented.

FIG. 11 is a horizontal sectional view showing a horizontal sectional view of the vertical heating furnace 210 according to another embodiment of the present invention. FIG. 12 is a view of XII-XII of FIG. 11, which is an enlarged view showing the ends of the first feed support shaft 218a and the second feed support shaft 218b that support and transport the object W to be transported. ..

In the vertical heating furnace 210 of the present embodiment, concave notches 142 are formed at the four corners of the rectangular plate-shaped object to be transported W as compared with the vertical heating furnace 110 of the second embodiment shown in FIGS. 6 to 8. A pair of first feed support shafts 218a and a pair of second feed support shafts 218b that function as feed support members sandwich the transported object W in the left-right direction, respectively, on the two sides of the transported object W. The difference is that it is located on the outside.

Further, in the vertical heating furnace 210 of the present embodiment, the cross-sectional shape of the pair of the first feed support shaft 218a and the pair of the second feed support shaft 218b and the shape of the support protrusions are the pair of the first feed support shaft 218a and the pair. In that it differs from the second feed support shaft 218b of the above, and that the pair of first feed support shafts 218a and the pair of second feed support shafts 218b are rotated around the eccentric axes HLa and HLb. It is different from the type heating furnace 110. Further, in the vertical heating furnace 210 of the present embodiment, two pairs of longitudinal guide members 32a and 32b for guiding by sliding contact with the other two sides of the object W to be transported have a pair of first feed support shafts 218a and 32b. It differs from the vertical heating furnace 110 in that it is provided in a fixed position in parallel with the pair of second feed support shafts 218b. However, the parts other than those differences, such as the furnace body 14, are the same as those of the vertical heating furnace 110.

As shown in FIGS. 11 and 12, the pair of first feed support shafts 218a and the pair of second feed support shafts 218b have columnar portions 244a and 244b, and eccentric axes HLa and HLb from the columnar portions 244a and 244b. It is provided with shaft end portions 246a and 246b having a diameter relatively smaller than that of the columnar portions 244a and 244b, which are projected in the longitudinal direction as the center.

A part of the columnar portions 244a and 244b avoids interference with the conveyed object W in a non-supported state in which the pair of first feed support shafts 218a and the pair of second feed support shafts 218b do not support the conveyed object W. In order to do so, the notch surfaces 278a and 278b are formed, respectively. The cutout surface 278a is formed so as to be parallel to the line connecting the central axis CLa of the columnar portion 244a and the eccentric axis HLa in the plan view of FIG. 11, and is centered on the central axis CLa of the columnar portion 244a. It corresponds to an angle range of 90 °. The cutout surface 278b is formed so as to be parallel to the line connecting the central axis CLb of the columnar portion 244b and the eccentric axis HLb in the plan view of FIG. 11, and is centered on the central axis CLb of the columnar portion 244b. It corresponds to an angle range of 90 °.

In the plan view of FIG. 11, the columnar portion 244a includes a line passing through the central axis CLa orthogonal to the notch surface 278a, a line connecting the end of the notch surface 278a on the eccentric axis HLa side, and the columnar portion 244a. By forming a groove so as to leave a portion surrounded by the outer peripheral surface 280a of the object W, a plurality of support plates 226a supporting two sides of the object to be transported W are formed at equal intervals in the longitudinal direction. ing. The equal spacing between the support plates 226a is a feed amount of, for example, about 10 to 20 mm, which is sufficiently larger than the thickness of the object W to be transported.

In the plan view of FIG. 11, the columnar portion 244b includes a line passing through the central axis CLb orthogonal to the notch surface 278b, a line connecting the end of the notch surface 278b on the eccentric axis HLb side, and the columnar portion 244b. By forming a groove so as to leave a portion surrounded by the outer peripheral surface 280b of the object W, a plurality of support plates 226b supporting two sides of the object to be transported W are formed at equal intervals in the longitudinal direction. ing. The equal spacing between the support plates 226b is a feed amount of, for example, about 10 to 20 mm, which is sufficiently larger than the thickness of the object W to be transported. The support plates 226a and 226b function as support protrusions for supporting the transported object W.

The vertical transfer mechanism 216 of the present embodiment includes a pair of first feed support shafts 218a, a pair of second feed support shafts 218b, two pairs of first vertical actuators 24a, and two pairs of second vertical actuators 24b. Two sets of upper and lower rotary actuators 148a and two sets of upper and lower rotary actuators 148b are provided. In the operation example shown in FIG. 16 described later, since the two pairs of the second vertical actuators 24b and 24b are not operated, they may not be provided.

The pair of first feed support shafts 218a and the pair of second feed support shafts 218b are rotated around the eccentric axes HLa and HLb by the rotary actuators 148a and 148b to obtain the transported object W shown in FIG. It is selectively positioned in a supported state in which it is supported and a non-supported state in which the transported object W is not supported as shown in FIG. FIG. 14 shows the rotation position between the supported state and the non-supported state. The first feed support shaft 218a shown in FIG. 11 is in a non-supported state, and the second feed support shaft 218b is in a supported state. In FIGS. 13 to 15, the second feed support shaft 218b is typically shown.

In this embodiment, the electronic control device 120 operates the pair of first feed support shafts 218a and the pair of second feed support shafts 218b according to the time chart of FIG. 16 in the same manner as in FIG. 9 of the above-mentioned second embodiment. .. That is, in the electronic control device 120, from the support state in which the pair of second feed support shafts 218b and the other pair of first feed support shafts 218a each support the transported object W, that is, from the original position of the feed cycle (at the time of t0). , The pair of second feed support shafts 218b is rotated around the eccentric axis HLb, and the support plate 226a formed on the pair of second feed support shafts 218b is removed from the object W to be in a non-supported state (t1). At the time).

Next, the pair of first feed support shafts 218a are fed in the longitudinal direction, that is, upward by a predetermined amount in a supported state supporting the object W to move the object W by one stroke (at the time of t2), and then the pair. The second feed support shaft 218b is rotated around the eccentric axis HLb to support the transported object W (at the time of t3).

Next, another pair of first feed support shafts 218a is rotated around the central axis CLa to make the support plate 226a removed from the object W to be transported (at the time of t4), and in this state, the longitudinal direction for one stroke. That is, it is returned downward (at t5), and the other pair of first feed support shafts 218a is rotated around the eccentric axis HLa to support the transported object W and set the original position of the feed cycle (at t6). ..

By repeating such an operation of one cycle, the electronic control device 120 sequentially sends the objects to be conveyed upward one by one with a certain interval in the vertical direction. At the same time, the electronic control device 120 supplies the transported object W one by one from a loading device (not shown) to the transport inlet on the lower side of the vertical heating furnace 210, and an unloading device (not shown) is used to supply the vertical heating furnace 210. The objects W to be transported are taken out one by one from the transport outlet on the upper side.

FIG. 17 is a time chart showing another control operation example of the electronic control device 120 of the present embodiment, and corresponds to FIG. 10 of the second embodiment. Also in this embodiment, in addition to the operation of FIG. 16, for example, the electronic control device 120 has an eccentric axis HLb on the pair of second feed support shafts 218b so that the support plates 226a and 226b and the object W to be transported do not interfere with each other. The pair of first feed support shafts 218a is moved by a predetermined distance to the side opposite to the feed of the pair of second feed support shafts 218b prior to being rotated around to move from the non-support position to the support position. Further, prior to rotating the pair of first feed support shafts 218a around the eccentric axis HLa axis to move from the non-support position to the support position, the pair of second feed support shafts 218b is the other pair of first feed support shafts. The 218a can be moved by a predetermined distance to the side opposite to the feed direction.

As described above, according to the vertical heating furnace 210 of the present embodiment, the electronic control device 120 has a pair of second feed support shafts 218b located on a line passing through the center of the object W to be transported around the eccentric axis HLb. By rotating and feeding the other pair of first feed support shafts 218a in the longitudinal direction in a non-supported state of the transported object W, the transported object W is moved by one stroke, and then the pair of first feed support shafts. The 218b is rotated around the eccentric axis HLb to support the transported object W, and then another pair of first feed support shafts 218a is rotated around the eccentric axis HLa to support the transported object W. The other pair of first feed support shafts 218a are rotated around the eccentric axis HLa to be the support position of the object to be transported W. By repeatedly executing this transport cycle, it is possible to feed a plurality of objects to be transported W one by one in the upward or downward direction while supporting a plurality of objects W to be transported in a state of being separated in the vertical direction. The binder generated from the heat-treated material placed or housed in the container is easily removed, and the occurrence of damage to the material to be transported located at the bottom is suppressed.

In the vertical heating furnace 210 of this embodiment, when the electronic control device 120 operates as shown in FIG. 17, the pair of second feed support shafts 218b are rotated around the eccentric axis HLb to support from a non-support position. Prior to the position, the other pair of first feed support shafts 218a are moved by a predetermined distance to the side opposite to the feed direction of the pair of second feed support shafts 218b, and the other pair of first feed support shafts 218a are moved. The pair of second feed support shafts 218b is predetermined to be opposite to the feed direction of the other pair of first feed support shafts 218a prior to rotating the eccentric axis around the HLa axis to move from the non-support position to the support position. Can be moved a distance. In this case, even if the support plates (support protrusions) 226a and 226b are not formed with an inclined surface for attracting (guide in the vertical direction) the object to be transported W, the support plates 226a and 226b and the object to be transported W are not formed. Interference with is prevented.

In the vertical heating furnace 210 of the present embodiment, in the transported object W, the other two parallel sides of the transported object W are the first feed support shaft 218a and the second feed support shaft 218b (four feed support shafts). ), And the guide members 32a and 32b provided at a fixed position are guided by sliding contact with the guide members 32a and 32b. As a result, the transported object W is guided by the pair of guide members 32a and 32b located outside the other two parallel sides, and the first feed support shaft 218a and the first feed support shaft 218a that engage the two parallel sides are engaged with each other. Since it is fed upward or downward by the second feed support shaft 218b, the transported object W is prevented from falling off from the other two parallel sides in the outward direction.

FIG. 18 is a horizontal sectional view showing a horizontal sectional view of the vertical heating furnace 310 according to another embodiment of the present invention. FIG. 19 is a view of XIX-XIX of FIG. 18, which is an enlarged view showing the end portions of the first rack shaft 318a and the second rack shaft 318b that support and transport the object W to be transported. FIG. 20 is a left side view of FIG. 18, which is an enlarged view showing the end portions of the first rack shaft 318a and the second rack shaft 318b in an enlarged manner.

In the vertical heating furnace 310 of this embodiment, as compared with the vertical heating furnace 110 of Example 2 shown in FIGS. 6 to 8, concave notches 142 are formed at the four corners of the rectangular plate-shaped object to be transported W. A pair of first rack shafts 318a and a pair of second rack shafts 318b, which do not serve as feed support members, are located outside the four corners of the object W to be transported and are on the diagonal line of the object W to be transported. The difference is that they are rotatably located around the rotation axes KLa and KLb.

Further, in the vertical heating furnace 310, the cross-sectional shape and the shape of the support protrusions of the pair of first rack shafts 318a and the pair of second rack shafts 318b have the pair of first feed support shafts 218a and the pair of second feed supports. It differs from the vertical heating furnace 110 in that it differs from the shaft 218b and that the pair of first rack shafts 318a and the pair of second rack shafts 318b are rotated around the rotation axes KLa and KLb. Further, the vertical heating furnace 310 is different from the vertical heating furnace 110 in that the pair of first rack shafts 318a and the pair of rack shafts 318b each support the vicinity of the four corners of the four sides of the object W to be transported. .. However, the parts other than those differences, such as the furnace body 14, are the same as those of the vertical heating furnace 110.

As shown in FIGS. 18, 19 and 20, the pair of first rack shafts 318a has a flat columnar portion 344a and a rotation axis located eccentrically from the prismatic portion 344a toward the four corners of the object W to be transported. It is provided with a shaft end portion 346a projecting in the longitudinal direction about KLa. The thickness of the prismatic portion 344a and the diameter of the shaft end portion 346a are preferably the same, but may not be the same. Further, the pair of second rack shafts 318b are projected in the longitudinal direction around a flat columnar portion 344b and a rotation axis KLb located eccentrically from the prismatic portion 344b to the four corners of the object W to be transported. A shaft end portion 346b and the like are provided. The thickness of the prismatic portion 344b and the diameter of the shaft end portion 346b are preferably the same, but may not be the same.

Support teeth 326 are formed on one surface of the prismatic portions 344a and 344b at regular intervals in the longitudinal direction of the prismatic columns 344a and 344b. In the support tooth 326, for example, similarly to the support tooth 26 of the first embodiment described above, the tooth streaks of the support tooth 326 are horizontal, and the inclined surface L is formed so that the tooth width becomes smaller toward the tip. .. The support teeth 326 are formed with a feed amount sufficiently larger than the thickness of the object W to be transported, for example, at intervals of about 10 to 20 mm. The support tooth 326 functions as a support protrusion that supports the object W to be transported.

The vertical transfer mechanism 316 of the present embodiment includes a pair of first rack shafts 318a, a pair of second rack shafts 318b, two pairs of first vertical actuators 24a and 24a, and two pairs of second vertical actuators 24b and 24b. It includes 24b, two pairs of upper and lower rotary actuators 148a, and two sets of upper and lower rotary actuators 148b. In the operation example shown in FIG. 21 described later, the two pairs of the second vertical actuators 24b and 24b are not operated, and therefore may not be provided.

The pair of first rack shafts 318a and the pair of second rack shafts 318b are rotated by 90 ° around the rotation axes KLa and KLb by the rotary actuators 148a and 148b, so that the pair of FIGS. 18, 19 and 20 is shown. A supported state that supports the transported object W as shown at the position of the first rack shaft 318a, and a non-supported state that does not support the transported object W as shown in the pair of second rack shafts 318b of FIGS. 18 and 20. It is selectively positioned in and.

In this embodiment, the electronic control device 120 has a pair of first rack shafts 318a and a pair of second rack shafts 318b according to the time chart of FIG. Operate in the same way. That is, in the electronic control device 120, the pair of second rack shafts 318b and the pair of first rack shafts 318a are supported from the support state in which the transported object W is supported, that is, the original position of the feed cycle (at the time of t0). The two rack shafts 318b are rotated around the rotation axis KLb to bring the support teeth 326 formed on the pair of the second rack shafts 318b into a non-supported state by removing them from the object to be transported W (at the time of t1).

Next, the transported object W is moved by one stroke by feeding a predetermined amount in the longitudinal direction, that is, upward in a supported state in which the other pair of first rack shafts 318a supports the transported object W (at the time of t2), and then. The pair of second rack shafts 318b is rotated around the rotation axis KLb to support the transported object W (at the time of t3).

Next, another pair of first rack shafts 318a are rotated around the rotation axis KLa to bring the support teeth 326 removed from the object to be transported W (at the time of t4), and in this state, the longitudinal direction for one stroke. That is, it is returned downward (at t5), and the other pair of first rack shafts 318a is rotated around the rotation axis KLa to support the transported object W and set it as the original position of the feed cycle (at t6). ..

By repeating such an operation of one cycle, the electronic control device 120 sequentially sends the objects to be conveyed upward one by one with a certain interval in the vertical direction. At the same time, the electronic control device 120 supplies the transported object W one by one from a loading device (not shown) to the transport inlet on the lower side of the vertical heating furnace 310, and an unloading device (not shown) is used to supply the vertical heating furnace 310. The objects to be transported W are taken out one by one from the transfer outlet on the upper side.

As described above, according to the vertical heating furnace 310 of the present embodiment, the electronic control device 120 has a pair of second rack shafts 318b and a pair of first rack shafts 318a located outside the four corners of the object W to be transported. The pair of second rack shafts 318b is rotated around the rotation axis KLb, and the support teeth 326 formed on the pair of second rack shafts 318b are removed from the transported object W to be in a non-supported state. By feeding a predetermined amount of the pair of first rack shafts 318a in the longitudinal direction, that is, upward in a supported state supporting the transported object W, the transported object W is moved by one stroke, and then the pair of second rack shafts 318b are moved. It is rotated around the rotation axis KLb to support the transported object W, and then another pair of first rack shafts 318a is rotated around the rotation axis KLa to support the supported teeth from the transported object W. In the non-supported state with the 326 removed, in this state, it is returned in the longitudinal direction, that is, downward for one stroke, and the other pair of first rack shafts 318a is rotated around the rotation axis KLa to support the object W to be transported. The state is the original position of the feed cycle. By repeatedly executing this transport cycle, it is possible to feed a plurality of objects to be transported W one by one in the upward or downward direction while supporting a plurality of objects W to be transported in a state of being separated in the vertical direction. The binder generated from the heat-treated material placed or housed in the container is easily removed, and the occurrence of damage to the material to be transported located at the bottom is suppressed.

FIG. 22 is a vertical sectional view showing a vertical sectional view of the vertical heating furnace 410 of another embodiment of the present invention. FIG. 23 is a cross-sectional view showing a horizontal cross section of FIG. 22. FIG. 24 is a diagram illustrating a supported state of the transported object W in FIG. 22. FIG. 25 is an enlarged view showing an enlarged support state of the object W to be transported in FIG. 22. 22 is a sectional view taken along the line XXII-XXII of FIG. 23.

Compared with the vertical heating furnace 110 of the second embodiment shown in FIGS. 6 to 8, the vertical heating furnace 410 of the present embodiment functions as a feed support member in place of the two pairs of feed support shafts 118a and 118b. Two pairs of feed support screw shafts 418a and 418b are used, and two pairs of cylindrical notches (shown in FIG. 23) formed at the four corners of the rectangular plate-shaped object W to be transported are cylindrical. It differs in that it is formed along the outer peripheral surface of the portions 444a and 444b. Further, in the vertical heating furnace 410, the spiral ridges 426a and 426b formed on the outer peripheral surfaces of the two pairs of feed support screw shafts 418a and 418b function as support protrusions for supporting the object W to be transported. And, the two pairs of feed support screw shafts 418a and 418b are different from the vertical heating furnace 110 in that they do not move up and down and are rotated synchronously around the central axes CLa and CLb, respectively. However, the parts other than those differences are the same as those of the vertical heating furnace 110, for example, for the furnace body 14 and the like.

In FIGS. 22 to 25, the pair of first feed support screw shafts 418a and the pair of second feed support screw shafts 418b sandwich the transported object W from the outside of the four corners of the transported object W and sandwich the transported object W. The central axis CLa and CLb are arranged so as to be located on the diagonal line of W.

The pair of feed support screw shafts 418a project vertically from the columnar portion 444a in which the spiral ridge 426a functioning as a support protrusion is formed on the outer peripheral surface and the central axis CLa as the center. It is provided with a shaft end portion 446a having a diameter relatively smaller than that of the columnar portion 444a. Similarly, the pair of feed support screw shafts 418b function as support protrusions from the columnar portion 444b and the columnar portion 444b in which the spiral ridge 426b having a screw opposite to the ridge 426a is formed on the outer peripheral surface. It is provided with a shaft end portion 446b having a diameter relatively smaller than that of the columnar portion 444b, which is projected up and down in the longitudinal direction about the central axis CLb.

As shown in FIG. 24, the ridge 426a formed in the columnar portion 444a is formed so as to be a reverse screw with respect to the ridge 426b formed in the columnar portion 444b. The ridges 426a and 426b project in the radial direction to support the outer edge portion of the transported object W, and have a value sufficiently larger than the thickness of the transported object W in the central axis CLa and CLb directions, for example, 10. It has a constant pitch with a size of about 20 mm. As a result, when the pair of first feed support screw shafts 418a and the pair of second feed support screw shafts 418b are rotated once around the central axis CLa and CLb, the feed W to be transported is sufficiently larger than its thickness. Amount For example, a predetermined feed amount of about 10 to 20 mm can be fed in the vertical direction.

The upper end and the lower end of the furnace body 14 are closed by the upper shielding plate 434 and the lower shielding plate 436 fixed to the machine frame 12. A pair of upper and lower bearings 484a fitted to the shaft end portion 446a and a pair of upper and lower bearings 484b fitted to the shaft end portion 446b are fixed to the upper shielding plate 434 and the lower shielding plate 436. As a result, the pair of first feed support screw shafts 418a and the pair of second feed support screw shafts 418b are rotated around the central axis CLa and CLb by the pair of upper and lower bearings 484a and the pair of upper and lower bearings 484b, respectively. It is supported as much as possible.

The lower shaft end portion 446a of the pair of first feed support screw shafts 418a is connected to the pair of first rotary actuators 448a fixed to the lower shielding plate 436. Further, the lower shaft end portion 446b of the pair of second feed support screw shafts 418b is connected to the pair of second rotary actuators 448b fixed to the lower shield plate 436. The first rotary actuator 448a and the second rotary actuator 448b have a pair of first feed support screw shafts 418a and a pair of second feed support screw shafts 418b, as shown by the electronic control device 420, for example, as shown by an arrow in FIG. By continuously or intermittently rotating and driving in the opposite rotation direction, the objects to be conveyed W are fed one by one at regular intervals in the vertical direction.

The vertical transfer mechanism 416 of this embodiment includes a pair of first feed support screw shafts 418a, a pair of second feed support screw shafts 418b, a pair of first rotary actuators 448a, and a pair of second rotary actuators 448b. It is equipped with.

As described above, according to the vertical heating furnace 410 of the present embodiment, the transported object W has a rectangular plate shape in which concave notches 442 are formed at the four corners, and is covered on the outside of the four corners of the transported object W. The first feed support screw shaft 418a and the second feed support screw shaft 418b located on the diagonal lines of the conveyed object W are used as a plurality of feed support members, and the columnar portion 444a of the first feed support screw shaft 418a, On the outer peripheral surface of the columnar portion 444b of the second feed support screw shaft 418b, spiral ridges 426a and 426b having a constant pitch that function as support protrusions for supporting the four corners of the object W are formed and electronically controlled. The device (feed drive control device) 420 rotates the first feed support screw shaft 418a and the second feed support screw shaft 418b continuously or intermittently in reverse walking in synchronization with the central axis CLa and CLb, respectively. By doing so, the objects to be transported W are sent one by one in the vertical direction, that is, in the upward or downward direction at regular intervals. As a result, a plurality of objects to be transported W can be supported one by one in the upward or downward direction while being supported at a certain interval in the vertical direction, and are placed or accommodated in the objects to be transported W. The binder generated from the heat-treated object is easily removed, and the occurrence of damage to the transported object located at the bottom is suppressed.

Further, according to the vertical heating furnace 410 of the present embodiment, the concave notches 442 formed at the four corners of the rectangular plate-shaped object W to be transported have the first feed support screw shaft 418a and the second feed support screw shaft. Since it is formed along the outer peripheral surfaces of the columnar portions 444a and 444b of the 418b, the four corners of the object to be transported W are formed regardless of the rotation angle positions of the first feed support screw shaft 418a and the second feed support screw shaft 418b. Since the object to be transported W is positioned by engaging with the concave notch 442 formed in each of the above, a guide member for guiding the object to be transported W in the vertical direction becomes unnecessary.

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

For example, the object W to be transported in the above-described embodiment is square but may be rectangular. In this case, preferably, the horizontal cross section of the space S in the furnace body 14 may also be rectangular.

Further, in the operation of FIG. 5, the operation of FIG. 9, and the operation of FIG. 21 described above, an example in which the second vertical actuators 24b and 24b are not operated up and down is shown, but it contributes to the feed in one feed cycle. It may be operated up and down as such.

Further, in the vertical heating furnace 10 of Example 1, the vertical heating furnace 110 of Example 2, the vertical heating furnace 210 of Example 3, and the vertical heating furnace 310 of Example 4, the transported object W is moved downward. The act of transporting may be performed.

Further, the first feed support shaft 118a and the second feed support shaft 118b of the embodiment of FIGS. 6 to 8 have a cross-sectional shape including the fan-shaped support plates 126a and 126b and the fan-shaped support plate 126a. Each may be configured by alternately laminating and joining plates having a cross-sectional shape that does not include 126b. The first feed support shaft 218a and the second feed support shaft 218b of the embodiment of FIGS. 11 to 15 may also have the same laminated structure.

Further, the rotary actuator 148a and the rotary actuator 148b of the second embodiment, and the first rotary actuator 448a and the second rotary actuator 448b of the fourth embodiment are composed of, for example, an electrically driven motor actuator, but are compressed. It may be composed of a pneumatic actuator driven by air, a hydraulic actuator driven by hydraulic pressure of water, oil, or the like.

Further, in the vertical heating furnace 10 of Example 1 and the vertical heating furnace 210 of Example 3, a pair of guide members 32a and a pair of guide members 32b were provided, but the furnace length was short and the displacement during transportation was short. It may not be provided if it is within an acceptable range or if there is no deviation during transportation due to reasons such as a large friction coefficient between the surface supporting the object to be transported W and the object to be transported W.

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

10, 110, 210, 310, 410: Vertical heating furnace 12: Machine frame 14: Furnace body 14a, 14b, 14c, 14d: Side wall 18a, 318a: Pair of first rack shafts (feed support member)
18b, 318b: Pair of second rack shafts (feed support member)
20, 120, 420: Electronic control device (feed drive control device)
26: Supporting teeth (supporting protrusions)
32a, 32b: Guide member 118a, 218a: Pair of first feed support shafts (feed support member)
118b, 218b: Pair of second feed support shafts (feed support member)
126a, 126b: Fan-shaped support plate (support protrusion)
154a, 154b: ridge (convex positioning part)
226a, 226b: Support plate (support protrusion)
326: Supporting teeth (supporting protrusions)
418a: Pair of first feed support screw shafts (feed support member)
418b: Pair of second feed support screw shafts (feed support member)
426a, 426b: Spiral ridges (support protrusions, spiral ridges)
CLa, CLb: Central axis HLa, HLb: Eccentric axis KLa, KLb: Rotating axis S: Inside space in the furnace

Claims (10)

A vertical heating furnace having a furnace body in which a vertical space for accommodating an object to be transported is formed, and capable of transporting the object to be conveyed in the vertical direction in the space inside the furnace.
A plurality of vertically longitudinal feed support members provided around the object to be transported in the furnace body, and a plurality of feed support members.
A plurality of support protrusions that protrude from each of the plurality of feed support members and support the outer peripheral portion of the object to be transported with a certain interval in the vertical direction.
Reciprocating motion in the approaching separation direction, reciprocating motion in the vertical direction, and vertical direction so as to support the plurality of objects to be transported one by one in the upward or downward direction while supporting them at a certain interval in the vertical direction. It is characterized by including a feed drive control device that applies a reciprocating motion, a reciprocating rotary motion around a vertical axis, or a rotary motion around a vertical axis between the plurality of feed support members. Vertical heating furnace. The object to be transported has a rectangular plate shape and is in the shape of a rectangular plate.
The plurality of feed support members are two pairs of rack members located on the outside of two parallel sides of the object to be transported so as to sandwich the object to be transported.
On the facing surfaces of the two pairs of rack members, a plurality of support teeth are formed as the plurality of support protrusions at equal intervals in the longitudinal direction of the two pairs of rack members.
In the feed drive control device, the pair of second rack members of the two pairs of rack members are separated from each other, and the plurality of support teeth formed on the pair of second rack members are removed from the object to be transported. In the non-supported state, the pair of first rack members of the two pairs of rack members are supported by the plurality of support teeth formed on the pair of first rack members to support the object to be transported. After moving the transported object by one step by feeding it in the longitudinal direction, the pair of second rack members are brought close to each other to support the transported object, and then the pair of first rack members are supported. The members are separated from each other and returned in the longitudinal direction for one step in a non-supported state removed from the transported object, and the pair of first rack members are brought close to each other to support the transported object. The vertical heating furnace according to claim 1, wherein the objects to be conveyed are sent one by one at regular intervals in the longitudinal direction by repeating the above steps. The pair of first rack members and the pair of second rack members are located on the outside of the two parallel sides of the object to be transported, sandwiching the object to be transported.
The vertical heating furnace according to claim 2, wherein the vertical heating furnace according to claim 2 includes at least a pair of guide members located on the outside of two other parallel sides of the transported object so as to sandwich the transported object. The object to be transported forms a rectangular plate with concave notches formed at the four corners.
The plurality of feed support members are two pairs of feed support shafts located sandwiched in the diagonal direction of the object to be transported.
The two pairs of feed support shafts are positioned so as to be engageable with the concave notch regardless of the rotation angle around the central axis of each of the two pairs of feed support shafts, and are convex to position the object to be transported. A shape positioning portion and a fan-shaped support plate formed at equal intervals in the longitudinal direction of the two pairs of feed support shafts and supporting the four corners of the object to be transported according to the rotation angle around the central axis are provided.
The feed drive control device does not support the transported object by rotating a pair of second feed support shafts located on the diagonal line of the transported object among the two pairs of feed support shafts around the central axis. In this state, the pair of first feed support shafts out of the two pairs of feed support shafts are fed in the longitudinal direction to move the object to be transported by one step, and then the pair of second feed support shafts are moved. The transported object is rotated around the central axis to support the object to be transported, and then the pair of first feed support shafts are rotated around the central axis to bring the transported object to the unsupported state, and then one step is performed. A state in which the transported object is separated by a certain interval in the longitudinal direction by returning to the longitudinal direction and rotating the pair of first feed support shafts around the central axis to put the transported object in a supported state. The vertical heating furnace according to claim 1, characterized in that the sheets are sent one by one. The feed drive control device transfers the pair of first feed support shafts to the pair of second feeds prior to rotating the pair of second feed support shafts around the central axis to change from the non-supported state to the supported state. The pair of second feed supports is moved from the non-support state to the support state by moving the support shafts to the side opposite to the feed direction by a predetermined distance and rotating the pair of first feed support shafts around the central axis. The vertical heating furnace according to claim 4, wherein the shaft is moved by a predetermined distance to a side opposite to the feed direction of the pair of first feed support shafts. The object to be transported has a rectangular plate shape and is in the shape of a rectangular plate.
The plurality of feed support members are four feed support shafts located on the outside of two sides parallel to each other of the object to be transported and sandwiching the object to be transported.
On the four feed support shafts, a plurality of support plates supporting the two parallel sides as the plurality of support protrusions are formed at equal intervals in the longitudinal direction of the four feed support shafts.
The plurality of support plates are formed on the feed support member at equal intervals in the longitudinal direction, and are formed on two sides parallel to each other according to the rotation angle of each of the four feed support shafts around the eccentric axis. Switched from the engaged support state to the non-support state,
The feed drive control device is a pair of second feed support shafts located on a line passing through the center of the object to be transported, out of the four feed support shafts located on the outside of the two parallel sides. Is rotated around the eccentric axis to put the transported object in an unsupported state, and the pair of first feed support shafts out of the four feed support shafts are fed in the longitudinal direction to deliver the transported object by 1. After moving by the number of steps, the pair of second feed support shafts are rotated around the eccentric axis to put the transported object in the supported state, and then the pair of first feed support shafts are rotated around the eccentric axis. After the transported object is placed in the unsupported state, it is returned to the longitudinal direction for one step, and the pair of first feed support shafts are rotated around the eccentric axis to bring the transported object into the supported state. The vertical heating furnace according to claim 1, wherein the objects to be transported are sent one by one in a state of being separated by a certain interval in the longitudinal direction. The feed drive control device uses the pair of first feed support shafts as the pair of second support shafts prior to rotating the pair of second feed support shafts around the eccentric axis to change from the non-supported state to the supported state. Prior to moving the pair of first feed support shafts by a predetermined distance to the side opposite to the feed direction of the feed support shaft and rotating the pair of first feed support shafts around the eccentric axis to change from the non-support state to the support state, the pair of second feeds. The vertical heating furnace according to claim 6, wherein the support shaft is moved by a predetermined distance to a side opposite to the feed direction of the pair of first feed support shafts. The object to be transported is characterized in that its other two parallel sides of the object to be transported are guided by sliding contact with a guide member provided at a fixed position in parallel with the four feed support shafts. The vertical heating furnace according to claim 6 or 7. The object to be transported has a rectangular plate shape and is in the shape of a rectangular plate.
The plurality of feed support members are four feed rack shafts forming two pairs located diagonally sandwiching the object to be transported.
A plurality of support teeth are formed on the four feed rack shafts as a plurality of support protrusions for supporting the object to be transported at equal intervals in the longitudinal direction of the four feed rack shafts.
The plurality of support teeth are engaged with one of the four sides of the object to be transported according to the rotation angle around the eccentric rotation axis of each of the four feed rack shafts. Can be switched to
The feed drive control device rotates a pair of second feed rack shafts out of the four feed rack shafts around an eccentric rotation axis to put the transported object in an unsupported state, and the four feed rack shafts. By feeding the pair of first feed rack shafts of the feed rack shafts in the longitudinal direction to move the object to be transported by one step, the pair of second feed rack shafts are moved around the eccentric rotation axis. The transported object is rotated to be in a supported state, and then the pair of first feed rack axes are rotated around an eccentric rotation axis to bring the transported object to a non-supported state. The vertical heating furnace according to claim 1, wherein the objects to be transported are sent one by one in the longitudinal direction at regular intervals. The object to be transported has a rectangular plate shape with notches formed at the four corners.
The plurality of feed support members are four feed support screw shafts located diagonally on the object to be transported outside the four corners of the object to be transported.
Spiral ridges having a constant pitch are formed on the four feed support screw shafts as a plurality of support protrusions for supporting the four corners of the object to be transported.
The feed drive control device continuously or intermittently rotationally drives the four feed support screw shafts around the axis to drive the object to be conveyed by the length of the four feed support screw shafts. The vertical heating furnace according to claim 1, wherein the sheets are sent one by one at regular intervals in the direction.

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