JP2013022596A - Conveyance device for hot press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain an object to be conveyed during conveyance at a temperature required for quenching between respective steps of a production line performing hot press.SOLUTION: This conveyance device for hot press includes a heat insulating cover 6 which is composed of a top panel 6a covering the whole area of the upper surface of a steel plate 10, and side panels 6b projecting downward from the outer peripheral edges of the top panel 6a and interiorly forming a heat insulating space S opened downward together with the top panel 6a. A plurality of hooking rods 62 are provided in an approachable and separable manner around the mutually opposed openings of the heat insulating space S. The hooking rods 62 are advanced from the lateral side to the heat insulating space S by mutual approaching movement and are hooked on the outer peripheral edge of the steel plate 10 from below so that the steel plate 10 is retained to be conveyed to the next step; meanwhile, the hooking rods 62 are retreated from the heat insulating space S to the lateral side by mutual separating movement, and transfer the steel plate 10 conveyed to the next step. With the steel plate 10 retained by the hooking rods 62, the openings of the heat insulating space S are covered with the steel plate 10.

Description

  The present invention relates to a hot press conveying apparatus that conveys a heated panel-shaped object to be conveyed between steps of a production line that performs hot pressing.

  In recent years, the automobile industry has demanded a lightweight and highly safe body structure. In order to meet this requirement, a high strength is achieved by hot pressing in order to obtain a body structure having a high strength without increasing the plate thickness. The press-molded product is obtained.

  In this hot press, generally, a press-formed product is obtained from a steel sheet heated in a heating furnace by press-molding by a mold closing operation, and the press-formed product is cooled and quenched in a mold-closed state. Therefore, the strength is increased.

  By the way, conveyance of a steel plate from a heating furnace to a mold in a hot press production line and conveyance of a press-formed product between molds in a production line that performs hot pressing with two or more molds are disclosed in, for example, Patent Document 1. It is carried out by the conveying device disclosed in the above. The transfer device is composed of a 6-axis general-purpose robot having material handling (hereinafter referred to as material handling) attached to an arm tip. The material handling device includes a frame extending in the horizontal direction and a plurality of suction pads protruding downward from the frame. And. Then, by bringing the plurality of suction pads into contact with the object to be transported from above and evacuating or depressurizing the inside of the suction pad, the material handling device sucks and holds the material to be transported, and the transporting device attaches to the material handling hand. The object to be transported held by suction is lifted and transported to the target mold.

Japanese Patent No. 4494871 (paragraphs 0002 and 0015, FIG. 9)

  However, in the transport apparatus disclosed in Patent Document 1, when transporting the transported object, portions other than the portion that contacts the suction pad of the transported object are exposed to the atmosphere. Therefore, a large amount of heat is dissipated from the transported object during transport and the temperature of the transported object decreases, and the transported object is necessary for quenching when transported into a mold for cooling. There is a possibility that the temperature cannot be maintained, and the press-molded product is not sufficiently quenched.

  The present invention has been made in view of such a point, and the object of the present invention is to maintain a transported object being transported at a temperature necessary for quenching between each process of a production line for performing hot pressing. An object of the present invention is to provide a hot press conveying device.

  In order to achieve the above object, the present invention is characterized in that a heated object to be conveyed is conveyed while being covered with a heat insulating cover.

  Specifically, the following means for solving problems were taken in a hot press transporting apparatus that holds and transports a heated panel-shaped transported object between processes on a production line that performs hot pressing.

  That is, in the first invention, from the top plate that covers the entire upper surface side of the object to be transported, and the side plate that projects downward from the outer peripheral edge of the top plate and forms a heat insulating space that opens downward with the top plate. The heat insulation cover and the heat insulation space are provided so as to be able to approach and separate from each other around the opening opposite to each other, and by approaching each other, the heat insulation space is advanced from the side, and the outer periphery of the object to be conveyed is latched from below. And holding means for transferring the object to be transported to the next process, while holding the object to be transported to the next process while retreating from the heat insulation space to the side by the separation operation. The opening of the heat insulation space is covered with the transported object in a state in which the hooking means holds the transported object.

  According to a second invention, in the first invention, there is provided a pair of movable plates which are constituted by at least a part of the side plate and which approach and separate from each other, and operating means for causing these movable plates to approach and separate from each other. The latching means is provided at a lower end edge of the movable plate, and is configured to advance and retract with respect to the heat retaining space by an approach / separation operation of the movable plate by the operating means.

  According to a third invention, in the first invention, the latching means is provided with an operating means for approaching and separating the latching means from each other, and the latching means is provided separately from the heat insulating cover, and is approached by the operation of the actuating means. -It is characterized by advancing and retreating with respect to the heat insulation space by the separation operation.

  According to a fourth invention, in the second invention, the latch means comprises a plurality of latch rods projecting inwardly at a lower end edge of the movable plate at a predetermined interval. A point contact portion that makes point contact from below is provided on the upper surface of the collar on the outer peripheral edge of the object to be conveyed.

  According to a fifth aspect, in the fourth aspect, the point contact portion includes a shaft portion and a head continuously connected to one end of the shaft portion, and the shaft portion includes the shaft portion. A through hole is formed in which the head is detachably inserted, and the head portion bulges on the upper surface of each of the latching hook portions in a state where the shaft portion is inserted into the through hole.

  According to a sixth aspect, in the fifth aspect, the point contact portion is formed of a ceramic material.

  According to a seventh invention, in the fifth invention, the point contact portion is formed of a lightweight concrete material.

  According to an eighth invention, in any one of the first to seventh inventions, at least inner surfaces of the top plate and the side plate are made of a ceramic material.

  According to a ninth invention, in any one of the first to eighth inventions, a heating means for heating the object to be conveyed is provided on the lower surface of the top plate.

  In the first invention, when the object to be conveyed is conveyed, the heat released from the upper surface side of the object to be conveyed remains in the heat insulation space whose opening is covered with the object to be conveyed and is not dissipated into the atmosphere. Therefore, the temperature of the heat insulation space is maintained at the same level as the object to be conveyed by the heat remaining in the heat insulation space, heat exchange between the object to be conveyed and the heat insulation space is suppressed, and the temperature of the object to be conveyed decreases. Thus, the temperature of the conveyed object immediately before being carried into the mold can be maintained at a temperature necessary for quenching.

  In the second invention, when the heat retaining cover is brought close to the object to be conveyed from above and the object to be conveyed is latched by the latching means, the pair of movable plates constituting a part of the side plate are separated from each other, Since it is difficult for contact to occur between the cover and the object to be conveyed, deformation of the object to be conveyed and damage to the heat insulating cover can be prevented.

  In the third invention, unlike the second invention described above, the side plate does not move when the transport device holds the object to be transported. Therefore, there is no situation where heat is dissipated from the heat insulation space into the atmosphere due to the movement of the movable plate, and the temperature of the heat insulation space is not easily lowered, and heat exchange between the object to be conveyed and the heat insulation space during transportation Can be further suppressed to prevent the temperature of the conveyed object from decreasing.

  In 4th invention, when a to-be-conveyed object is conveyed, since the contact area of the latching hook which contacts the said to-be-conveyed object becomes small compared with the case of the patent document 1 which adsorbs and holds a to-be-conveyed object with a suction pad. It is difficult for heat to be transferred from the conveyed object to the hanging rod. Therefore, this also suppresses a decrease in the temperature of the conveyed object that is caused by heat being transferred from the conveyed object to the heat insulation cover during the conveyance of the conveyed object, and the temperature of the conveyed object immediately before being carried into the mold is baked. It can be maintained at the temperature required for putting.

  In the fifth aspect of the invention, since the point contact portion can be removed from the latch, the point contact portion can be easily replaced when the point contact portion deteriorates due to the heat of the conveyed object.

  In 6th and 7th invention, when a to-be-conveyed object is conveyed, since the thermal conductivity of the point contact part which contacts the said to-be-conveyed object is low, it is hard to transmit heat to a latching rod from a to-be-conveyed object. Accordingly, even in this case, the temperature drop of the conveyed object caused by the heat escaping from the conveyed object to the heat insulation cover side is further suppressed, and the conveyed object caused by the heat transmitted from the conveyed object to the heat insulation cover side. The temperature of the object to be conveyed immediately before being carried into the mold can be maintained at a temperature necessary for quenching.

  In the eighth invention, since the heat conductivity of the heat insulating cover is lowered, the heat of the heat insulating space is hardly transmitted to the outside of the heat insulating cover. Therefore, the heat insulation effect of the heat insulating cover is increased, and further, the temperature drop of the conveyed object during conveyance can be prevented.

  In the ninth invention, since the temperature of the heat insulation space can be always kept at a high temperature by the heat generated from the heating means, the heat exchange between the object to be conveyed and the heat insulation space is further suppressed, and the temperature of the object to be conveyed during conveyance A decrease can be reliably prevented.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a layout diagram of a hot press production line in which a transport apparatus according to Embodiment 1 of the present invention is arranged, and (a) shows a state immediately after a transport apparatus lifts a steel plate heated in a heating furnace. ) Shows a side view showing a state immediately after the conveying device carries the steel plate into the mold. It is a perspective view of the holding | maintenance mechanism of the conveying apparatus which concerns on Embodiment 1 of this invention, and shows the state which a pair of movable plate approached mutually. It is a perspective view of the holding mechanism of the conveyance apparatus which concerns on Embodiment 1 of this invention, and shows the state from which a pair of movable plate was mutually separated. FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2. FIG. 5 is a cross-sectional view taken along the line BB in FIG. 3. It is the C section enlarged view of FIG. FIG. 7 is a view corresponding to FIG. 6 according to a modification of the first embodiment of the present invention. It is FIG. 2 equivalent view of Embodiment 2 of this invention. It is FIG. 2 equivalent view of Embodiment 3 of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiment is merely exemplary in nature.
Embodiment 1 of the Invention
FIG. 1 shows a production line 9 in which a transport apparatus 1 according to Embodiment 1 of the present invention is arranged. The production line 9 is capable of forming a steel plate (conveyed object) 10 by hot pressing, and a heating process 2 for heating the steel plate 10 and a press-formed product by press-forming the heated steel plate S. After that, a molding step 3 for cooling and quenching the press-molded product is provided, and the conveying device 1 is disposed between the heating step 2 and the molding step 3.

  The heating step 2 includes a heating furnace 20 that extends from the upstream side to the downstream side of the production line 9 and heats the steel plate 10. The heating furnace 20 includes a lower furnace body 21 installed below and an upper furnace body 22 installed above so as to face the lower furnace body 21. A plurality of rollers 21 a (shown only in FIGS. 4 and 5) that are rotationally driven by a motor and a heater (not shown) that raises the temperature of the atmospheric gas between the upper furnace body 22 are provided. And the steel plate 10 carried in to the upstream side of the heating furnace 20 is conveyed to the downstream side of the production line 9 by the rollers 21a, and in the course of conveyance, about 800 ° C. to 1000 ° C. suitable for hot pressing by a heater. The temperature can be increased.

  The molding step 3 includes a hydraulic press 31, and a mold 4 including an upper die 4a and a lower die 4b that perform press molding and cooling is set in the hydraulic press 31, and the hydraulic press 31 includes: The upper mold 4a of the mold 4 is moved up and down relative to the lower mold 4b. And when the upper die 4a is lowered to the bottom dead center by the hydraulic press 31 with the heated steel plate 10 set in the lower die 4b, a press-formed product (not shown) is obtained by press molding, By cooling and quenching the press-molded product with the mold 4 closed, the strength of the press-molded product can be increased.

  The transfer device 1 is a 6-axis general-purpose robot having a holding mechanism 5 for holding the steel plate 10 at the end of an arm, and the steel plate 10 heated in the heating furnace 20 in the heating step 2 is converted into gold in the forming step 3. The mold 4 is sequentially conveyed.

  As shown in FIGS. 2 to 5, the holding mechanism 5 has a rectangular top plate 6 a that covers the entire upper surface side of the steel plate 10, and a flat plate having a side plate 6 b that protrudes downward from the outer peripheral edge of the top plate 6 a. The ceramic heat insulating cover 6 is provided, and the top plate 6a and the side plate 6b form a heat insulating space S that opens downward inside the side plate 6b.

  Side plate 6b portions facing each other on the long side of the top plate 6a constitute a pair of movable plates 61, and the upper end edges of the pair of movable plates 61 are connected to the outer peripheral edge of the top plate 6a by four hinges H. It is pivotally supported so that the lower end sides can approach and separate from each other.

  Four substantially L-shaped hooks (holding means) 62 are provided on the inner surfaces of the lower half portions of the pair of movable plates 61 at predetermined intervals in the longitudinal direction of the movable plate 61. .

  The latch bar 62 has a horizontal protrusion 62a protruding inwardly from the lower edge of the movable plate 61, and a through hole 63 having a female screw part 63a on the inner surface at the front end side of the horizontal protrusion 62a. Is formed so as to penetrate substantially vertically.

  A ceramic bolt (point contact portion) 66 is attached to the through-hole 63.

  The bolt 66 includes a shaft portion 64 having a male screw portion 64a formed on the outer peripheral surface thereof, and a head portion 65 continuously connected to one end of the shaft portion 64, and the male screw portion 64a of the shaft portion 64 and the above-described head portion. The female screw part 63a of the through-hole 63 is screwed / unscrewed so that it can be attached / detached to / from the horizontal projecting part 62a. Then, with the shaft portion 64 fitted into the through hole 63, the head portion 65 bulges on the upper surface of the horizontal protrusion 62a.

  At the center of the top surface of the top plate 6a, there is provided a substantially disc-like mounting portion 6c that is attached to the tip of an arm portion of a six-axis general-purpose robot. An operating mechanism that moves the movable plate 61 to the side of the mounting portion 6c. A pair of actuators 7 (actuating means) are arranged point-symmetrically in plan view.

  Since the pair of operating mechanisms 7 are the same mechanism, only one operating mechanism 7 will be described in detail below.

  The operating mechanism 7 includes a cylinder 71 extending along the width direction of the heat insulating cover 6, and the cylinder 71 extends outward from one end in the longitudinal direction of the cylinder body 71a and a cylinder body 71a having an elongated cylindrical shape. The other end in the longitudinal direction of the cylinder body 71a is pivotally supported on the top surface of the top plate 6a so as to be swingable.

  One end of a plate-like first link member 72 having a substantially J shape in a side view is pivotally supported at the tip of the rod 71b.

  The other end of the first link member 72 is fixed to the surface of the one movable plate 61, and the middle portion of the first link member 72 has a length that gently curves along the shape of the first link member 72. A hole 72a is formed.

  A substantially rectangular plate-like second link member 73 is provided at one end edge in the width direction of the top plate 6a at a position corresponding to the first link member 72 obliquely upward, and the second link member 73 A guide shaft 73a is slidably fitted into the elongated hole 72a at the protruding end.

  A control unit (not shown) is connected to the operating mechanism 7, and when the rod 71b contracts with respect to the cylinder main body 71a according to a command from the control unit, as shown in FIG. 5, a guide shaft 73a that moves through a long hole 72a. When the first link member 72 moves toward the cylinder 71 while being guided by the second link member 73, the pair of movable plates 61 are separated from each other, while the rod 71b extends with respect to the cylinder body 71a. 4, the first link member 72 is moved away from the cylinder 71 while being guided by the second link member 73 by the guide shaft 73a that moves through the long hole 72a, and the pair of movable plates 61 is moved. They are getting closer to each other.

  When the pair of movable plates 61 are brought close to each other by the operation of the operation mechanism 7 in a state where the heat insulating cover 6 is made to correspond to the upper side of the steel plate 10, the hooks 62 are moved to the heat insulating space S. The steel plate 10 is hooked to the outer peripheral edge of the steel plate 10 from below, and the steel plate 10 is hooked and held to be transported to the forming step 3. The opening of the heat insulation space S is covered with the steel plate 10 in a state where the flange 62 holds the steel plate 10.

  On the other hand, when the pair of movable plates 61 are separated from each other by the operation of the operating mechanism 7 in a state where the respective latching rods 62 hold the steel plate 10, the respective latching rods 62 are located on the side from the heat retaining space S. The steel plate 10 that has been moved backward and transferred to the forming step 3 is transferred.

  Next, the conveyance of the steel plate 10 between the heating step 2 and the forming step 3 by the conveyance device 1 will be described in detail.

  As shown in FIG. 1A, the transport device 1 moves the holding mechanism 5 above the steel sheet 10 transported to the downstream side of the production line 9 while being heated in the heating furnace 20 in the heating step 2.

  Next, as shown in FIGS. 3 and 5, the transport device 1 operates the operating mechanism 7 to separate the pair of movable plates 61 from each other.

  And the said conveying apparatus 1 moves the said holding mechanism 5 below so that the said steel plate 10 may enter into the said heat insulation space S, Then, act | operates the action mechanism 7, and as shown in FIG.2 and FIG.4, The pair of movable plates 61 are brought close to each other. Then, each of the hooks 62 advances from the side into the holding space S and enters the lower side of the outer peripheral edge of the steel plate 10, and the apex of the head 65 of each bolt 66 makes point contact with the lower surface of the steel plate 10 to make each hook. The latch 62 latches (holds) the steel plate 10 from below.

  Thereafter, the conveying device 1 lifts the holding mechanism 5 in a state of holding the steel plate 10 and moves it between the upper mold 4a and the lower mold 4b of the mold 4 that is opened.

  Then, the transport device 1 operates the operating mechanism 7 to separate the pair of movable plates 61 from each other. Then, each said latching rod 62 recedes from the holding | maintenance space S to the side, and transfers the steel plate 10 conveyed by the formation process 3 on the lower mold | type 4b. Thereafter, the holding mechanism 5 is retracted from between the upper mold 4a and the lower mold 4b.

  Thereafter, the transport device 1 moves the holding mechanism 5 to the heating furnace 20, and then sequentially transports the heated steel plate 10 to the mold 4. And the said conveying apparatus 1 repeats conveyance of the steel plate 10 from the said heating furnace 20 to the metal mold | die 4 sequentially.

  As mentioned above, according to Embodiment 1 of this invention, when the steel plate 10 is conveyed, the heat radiated | emitted from the upper surface side of the said steel plate 10 accumulates in the heat insulation space S with which the opening was covered with the said steel plate S, and is in air | atmosphere. Will not spread. Therefore, the temperature of the heat insulation space S is maintained at a temperature similar to that of the steel plate 10 by the heat remaining in the heat insulation space S, heat exchange between the steel plate 10 and the heat insulation space S is suppressed, and the temperature of the steel plate 10 decreases. Thus, the temperature of the steel plate 10 immediately before being carried into the mold 4 can be maintained at a temperature necessary for quenching.

  Further, when the heat insulating cover 6 is brought close to the steel plate 10 from above and the steel plate 10 is hooked by the hooks 62, the pair of movable plates 61 constituting a part of the side plate 6b are separated from each other, and the heat insulating cover Since the contact between the steel plate 10 and the steel plate 10 hardly occurs, the deformation of the steel plate 10 and the breakage of the heat insulating cover 6 can be prevented.

  Furthermore, since the bolt 66 is in point contact with the lower surface of the steel plate 10 when the steel plate 10 is transported, the contact area of the hook 62 that contacts the steel plate 10 is suction-held by the suction pad. Since it is smaller than the case, it is difficult for heat to be transmitted from the steel plate 10 to the hook 62. Therefore, this also suppresses the temperature drop of the steel plate 10 caused by heat being transferred from the steel plate 10 to the heat insulating cover 6 during the conveyance of the steel plate 10, and quenches the temperature of the steel plate 10 immediately before being carried into the mold 4. It can be maintained at the required temperature.

  In addition, since the bolt 66 can be removed from the retaining rod 62, the bolt 66 can be easily replaced when the bolt 66 deteriorates due to heat of the steel plate 10 or the like.

  And since the volt | bolt 66 is a product made from a ceramic, when the steel plate 10 is conveyed, the heat conductivity of the volt | bolt 66 which contacts the said steel plate 10 is low, and heat is hard to be transmitted from the steel plate 10 to the latching rod 62. Therefore, also in this case, the temperature drop of the steel plate 10 caused by heat escaping from the steel plate 10 to the heat insulating cover 6 side is prevented, and the temperature of the steel plate 10 immediately before being carried into the mold 4 is set to a temperature necessary for quenching. Can be maintained.

  Moreover, since the top plate 6 a and the side plate 6 b of the heat insulating cover 6 are made of ceramic, the heat conductivity of the heat insulating cover 6 is low, and the heat of the heat insulating space S is hardly transmitted to the outside of the heat insulating cover 6. Therefore, the heat insulation effect of the heat insulating cover 6 is enhanced, and further, the temperature drop of the steel plate 10 during conveyance can be prevented.

  FIG. 7 shows a modification of the first embodiment of the present invention. This modification is different from the first embodiment described in detail above in the following points. That is, the female screw part 63a is not formed on the inner surface of the through hole 63 of the modified example.

  In this modified example, a lightweight concrete pin 69 composed of a shaft portion 67 and a head portion 68 continuously connected to one end of the shaft portion 67 is attached to the horizontal projecting portion 62 a instead of the bolt 66. Yes. Then, the shaft portion 67 is pushed in and inserted from above the through hole 63, and the head portion 68 bulges on the upper surface of the horizontal protruding portion 62 a in a state where the shaft portion 67 is inserted into the through hole 63. It is like that.

Therefore, in this modification, since the pin 69 is made of lightweight concrete having low thermal conductivity, heat is caused to escape from the steel plate 10 to the heat insulating cover 6 as in the first embodiment using the ceramic bolt 66. The temperature drop of the steel plate 10 can be prevented, and the temperature of the steel plate 10 immediately before being carried into the mold 4 can be maintained at a temperature necessary for quenching.
<< Embodiment 2 of the Invention >>
FIG. 8 shows the holding mechanism 5 of the transport apparatus 1 according to the second embodiment of the present invention. In the second embodiment, only a part of the structure of the holding mechanism 5 is different from that of the first embodiment, and the rest is the same as that of the first embodiment.

  The holding mechanism 5 of Embodiment 2 includes a heating device 8 that heats the steel sheet S during conveyance. The heating device 8 includes a heater body 8a and a heating wire 8b (heating means) whose heating is adjusted by the heater body 8a, and the heating wire 8b meanders while being meandered. It is arranged throughout.

Therefore, according to the second embodiment of the present invention, the temperature of the heat insulation space S can always be kept at a high temperature by the heat generated from the heating wire 8b, so that the heat exchange between the steel plate 10 and the heat insulation space S can be further suppressed and transported. The temperature drop of the steel plate 10 inside can be reliably prevented.
<< Embodiment 3 of the Invention >>
FIG. 9 shows the holding mechanism 5 of the transport apparatus 1 according to the third embodiment of the present invention. In the third embodiment, a part of the side plate 6b as in the first embodiment is not configured by the movable plate 61, and the retaining frame 60 as the retaining means is provided separately from the heat retaining cover 6. This is different from the first embodiment. Only the parts different from the first embodiment will be described below.

  The latching frame 60 of the third embodiment is a frame having a substantially L-shaped cross section extending along the lower edge of the side plate 6b. The lower edge of the latching frame 60 has a plate-like frame portion 60a protruding inward. Is provided.

  The first link member 72 of Embodiment 3 has a long plate shape in a side view, and one end is pivotally supported on the tip of the rod 71b and the other end is substantially the longitudinal direction of the latch frame 60. It is fixed in the center. And the long hole 72a like Embodiment 1 is not formed.

  Further, the second link member 73 of the third embodiment projects substantially horizontally from one edge in the width direction of the top plate 6a. A portion of the first link member 72 near the center in the longitudinal direction is pivotally supported by the other end of the second link member 73, and the first link member 72 swings around the other end of the second link member 73 as a fulcrum. It is possible to move.

  When the rod 71b contracts with respect to the cylinder main body 71a according to a command from a control unit (not shown), the first link member 72 swings with the other end of the second link member 73 as a fulcrum. When the rod 71b extends with respect to the cylinder body 71a, the first link member 72 swings with the other end of the second link member 73 as a fulcrum, and the pair of latching frames 60 approach each other. It is supposed to be.

  Further, when the pair of latching frames 60 are brought close to each other by the operation of the operation mechanism 7 in a state where the heat retaining cover 6 is made to correspond to the upper side of the steel plate 10, the pair of retaining frames 60 are brought into the heat retaining space S. The steel plate 10 is moved from the side to the outer peripheral edge, and the plate-like frame portion 60a is brought into surface contact from below to hold the steel plate 10 to be transported to the forming step 3. The opening of the heat retaining space S is covered with the steel plate 10 while the pair of retaining frames 60 hold the steel plate 10.

  On the other hand, when the pair of latching frames 60 hold the steel plate 10 and the pair of latching frames 60 are separated from each other by the operation of the operating mechanism 7, the latching frames 60 are separated from the heat retaining space S. The steel plate 10 which is retracted to the side and conveyed to the forming step 3 is transferred.

  In addition, conveyance of the steel plate 10 by the conveyance apparatus 1 of Embodiment 3 is the point which the latching frame 60 operate | moves regardless of the heat insulation cover 6, and the point which the plate-shaped frame part 60a contacts the steel plate 10, and latches. Since it is the same as conveyance of the steel plate 10 by the conveying apparatus 1 of Embodiment 1 except for, detailed description is abbreviate | omitted below.

  As described above, according to the third embodiment of the present invention, when the conveying device 1 holds the steel plate 10, the side plate 6b does not move unlike the above-described first embodiment. Therefore, a situation in which heat is dissipated from the heat insulation space S to the atmosphere due to the movement of the side plate 6b (movable plate 61) does not occur, the temperature of the heat insulation space S is not easily lowered, and the steel plate 10 and the heat insulation space during transportation The heat exchange with S can be further suppressed, and the temperature drop of the steel sheet 10 can be prevented.

  In the first and second embodiments of the present invention, the side plate 6b portions facing each other on the long side of the top plate 6a are constituted by the movable plate 61, but the side plates 6b facing each other on the short side of the top plate 6a. The part may be configured by a movable plate, and at least a part of the side plate 6b may be configured by a movable plate.

  Moreover, in Embodiment 3 of this invention, although the latching frame 60 is provided in the long side of the side plate 6b, you may provide not only in this but in the short side of the side plate 6b, and the long side of the side plate 6b It may be provided on both the side and the short side.

  In the first and second embodiments of the present invention, the steel plate 10 is supported by a total of eight horizontal protrusions 62a. However, the present invention is not limited to this, for example, a plate shape in which the latching means extends along the lower edge of the movable plate 61. And the steel plate 10 may be supported by the portion.

  In Embodiments 1 and 2 of the present invention, the bolts 66 or the heads 65 and 67 of the pins 69 attached to the horizontal protrusion 62a are point-contacted with the steel plate 10, but the top of the horizontal protrusion 62a has a sharp tip. The protrusions may be formed integrally and the part may be brought into point contact with the steel plate 10.

  In the third embodiment of the present invention, the plate-like frame portion 60a is plate-shaped and comes into surface contact with the steel plate 10. However, as in the first and second embodiments, the bolt 66 and the pin 69 are provided. It is good also as a structure which makes point contact with the steel plate 10.

  In the first and second embodiments of the present invention, the material of the bolt 66 is a ceramic material, and the material of the pin 69 is a lightweight concrete material. It doesn't matter.

  In the first and second embodiments of the present invention, the top plate 6a and the side plate 6b are formed of a ceramic material. However, the ceramic material is attached to the inside of the substrate formed of a steel material, an aluminum material, or the like. Alternatively, at least the inner surfaces of the top plate 6a and the side plate 6b may be made of a ceramic material.

  In the first to third embodiments of the present invention, the case where the transport device 1 is applied to transport the heated steel sheet 10 from the heating step 2 to the forming step 3 has been described. In the hot press production line 9 in which the cooling process for cooling and quenching the product is separated, the conveying device 1 can also be applied to transport the heated press-formed product from the molding process to the cooling process. .

  INDUSTRIAL APPLICABILITY The present invention is suitable for a hot press conveying apparatus that conveys a heated panel-shaped object to be conveyed between processes on a production line that performs hot pressing.

DESCRIPTION OF SYMBOLS 1 Conveyance device 6 Thermal insulation cover 6a Top plate 6b Side plate 7 Actuation mechanism (actuation means)
8b Heating wire (heating means)
9 Production line 10 Steel sheet (conveyed object)
60 Hanging frame (Hanging means)
61 Movable plate 62 Hanging rod (Hanging means)
63 Through-hole 63a Female screw part 64 Shaft part 64a Male screw part 65 Head 67 Shaft 68 Head S Heat insulation space

Claims (9)

A hot-press conveying device that holds and conveys a heated panel-like object to be conveyed between processes of a production line that performs hot pressing,
A top plate that covers the entire upper surface side of the object to be transported, and a heat insulating cover that includes a side plate that protrudes downward from the outer peripheral edge of the top plate and forms a heat insulating space that opens downward with the top plate;
Provided in the vicinity of the openings of the heat retaining space facing each other so as to be able to approach and separate from each other, advance from the side to the heat retaining space by the approaching operation of each other, and hook on the outer peripheral edge of the object to be transported from below. While holding the object to be transported to the next process, it is provided with a latching means for retreating from the heat retaining space to the side by the separation operation and transferring the transported object transported to the next process,
A hot press conveying apparatus, wherein the holding means holds the object to be conveyed, and the opening of the heat insulation space is covered with the object to be conveyed. In the hot press conveying apparatus according to claim 1,
A pair of movable plates configured of at least a part of the side plate and approaching and separating from each other;
An operating means for moving these movable plates closer to and away from each other;
The hooking means is provided at a lower end edge of the movable plate, and is adapted to advance and retreat with respect to the heat retaining space by an approach / separation operation by the operating means of the movable plate. Conveying device. In the hot press conveying apparatus according to claim 1,
An operating means for moving the hooking means toward and away from each other;
The hot press conveying device, wherein the hooking means is provided separately from the heat insulating cover, and moves forward and backward with respect to the heat insulating space by an approach / separation operation by the operation of the operating means. . In the hot press conveying apparatus according to claim 2,
The latching means comprises a plurality of latching rods projecting inwardly with a predetermined interval at the lower end edge of the movable plate,
A point contact portion that makes point contact from below on the outer peripheral edge of the object to be conveyed is provided on the upper surface of each latching rod. In the hot press conveying apparatus according to claim 4,
The point contact portion includes a shaft portion and a head continuously connected to one end of the shaft portion,
Each of the hooking hooks is formed with a through-hole into which the shaft is detachably inserted,
The hot-press conveying apparatus, wherein the head portion bulges on the upper surface of each of the latching hook portions in a state in which the shaft portion is fitted into the through hole. In the hot press conveying apparatus according to claim 5,
The said point contact part is formed with the ceramic material, The conveying apparatus for hot press characterized by the above-mentioned. In the hot press conveying apparatus according to claim 5,
The said point contact part is formed with the lightweight concrete material, The conveying apparatus for hot press characterized by the above-mentioned. In the hot press conveying device according to any one of claims 1 to 7,
At least inner surfaces of the top plate and the side plate are made of a ceramic material. In the hot press conveying device according to any one of claims 1 to 8,
A hot press conveying device, wherein a heating means for heating the object to be conveyed is provided on the lower surface of the top plate.

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