JP2015205297A - Core accommodating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a core accommodating device capable of absorbing deviation even when deviation occurs on a positioning pin of a core accommodating jig, positioning bushing of a core set lower jig, and a positional bushing of a main mold, thereby inserting the positioning pin into the positioning bushing without excessive load.SOLUTION: A lifting lifter part 20 is provided in an erecting state, on a core accommodating travel bogie 10 which travels between a core grip station H and a core accommodating station S, and a lifting frame part 30 is coupled to the core accommodating travel bogie 10. The lifting lifter part 20 and the lifting frame part 30 are coupled with a free mechanism part 40. Then, a core accommodating jig 60 having a positioning pin is held to the lifting frame part 30.

Description

  The present invention relates to a core storage device for storing a core in a main mold that has been conveyed on the molding line in a molding line for casting a cast article.

  2. Description of the Related Art Conventionally, a core storage device as in Patent Document 1 is known. This core storage device is provided with a suction box (core storage jig) supported by an upper frame and a cylinder for raising and lowering the upper frame and the suction box. And the said cylinder is connected with the trolley | bogie provided with the wheel, and this trolley | bogie is mounted in the running rail for going over the core support stand and the main mold | type. Also, the suction box is provided on a core support stand (core set lower jig) fixed at a predetermined position or a main mold (cast frame containing a mold) which is clamped and stopped by a molding line. A positioning pin that fits into the positioning bushing is provided. When the positioning pins and the positioning bushes are fitted to each other, they serve to attract the core at an accurate position or to store the core in the main mold.

  The above-described core receiving device stores the core in the main mold as follows. First, the core is manually placed on the core support stand. Thereafter, the suction box on the core support is lowered by the cylinder. The suction box is lowered while the positioning pin is inserted through the positioning bush of the core support base. When the lower surface of the suction box comes into contact with the surface of the core stored in the core support, the lowering of the suction box is stopped. Subsequently, the inside of the suction box is sucked, and the core on the core support base is sucked to the suction box. Thereafter, the suction box is raised and the carriage on the traveling rail is moved onto the main mold of the molding line. Subsequently, the suction box is lowered toward the main mold. The suction box is lowered while the positioning pin is inserted through the main positioning bush. When the core comes into contact with the main mold, the lowering of the suction box is stopped. Subsequently, when the suction of the suction box is released, the suction of the core is released and the core is stored in the main mold.

Japanese Utility Model Publication No. 63-29646

  In the above-described core holder, the suction box is lowered to attract the core and place the core in the main mold. At that time, the positioning pin of the suction box is attached to the core support base and the main mold positioning bush. Need to be inserted. There may be some deviation between the positioning pin and the positioning bush due to rail wear or the like. If the suction box is lowered in a state where this displacement has occurred, an excessive load is applied to the positioning pin, which may cause damage such as bending of the positioning pin or cylinder rod.

  Accordingly, the present invention has been made to solve the above-described problems, and its purpose is to cause a shift between the positioning pin of the core receiving jig and the positioning bushing of the core set lower jig and the positioning bush of the main mold. In such a case, it is an object of the present invention to provide a core holder that can absorb the deviation and allow the positioning pin to be inserted into the positioning bush without applying an excessive load.

  In order to achieve the above object, a core receiving device according to the present invention is installed on a core receiving outbound cart that travels between a core gripping station and a core receiving station, and the core receiving outbound cart. And a lifting mechanism for holding the core receiving jig and being lifted and lowered by the lifting lifter, and a free mechanism for connecting the lifting frame and the lifting lifter. To do.

  The core storage device according to the present invention further includes a guide rod portion with a free mechanism that is erected on the lift frame portion and connected to the core storage forward carriage or the lift lifter portion. The guide rod portion with the mechanism has a guide holder and a guide rod inserted through the guide holder. At the rising end of the lifting frame portion, the guide holder and the guide rod are fitted, and the lifting frame portion is lowered. In some cases, a gap is formed between the guide holder and the guide rod.

  The core receiving device according to the present invention includes a free mechanism portion that connects an elevating frame portion holding a core receiving jig having a positioning pin and an elevating lifter portion that elevates and lowers the elevating frame portion. Even when a displacement occurs between the positioning pin and the positioning bush of the jig for lowering the core set or the positioning bush of the main mold, the displacement can be absorbed to prevent the positioning pin and the lifter part from being damaged.

  Further, in the core receiving device of the present invention, the guide holder and the guide rod are fitted at the rising end of the lifting frame portion, and the guide rod portion with a free mechanism that lifts and lowers when the lowering frame portion is lowered. Since it is erected on the frame part and connected to the core carriage ascending trolley or the lifter / lifter part, when the lift frame part is at the rising end, the guide holder and guide rod are fitted to fit the lift frame part into the core It can be fixedly connected to the traveling carriage or the lifter unit, and when the elevating frame unit descends, it can be lowered without restricting the movement of the free mechanism unit. As a result, it is possible to prevent the elevating frame portion from shaking when the core delivery traveling carriage travels between the core gripping station and the core accommodation station, so that the core can be prevented from being damaged.

It is a schematic front view for demonstrating the core accommodation apparatus of this invention. It is a schematic left view for demonstrating the core accommodation apparatus of this invention. It is the schematic for demonstrating the principal part of the core accommodation apparatus of this invention. (A) is a front view, (b) is a left side view. It is the schematic explaining the free mechanism part of the core accommodation apparatus of this invention. (A) is a front view, (b) is a left side view. It is the schematic explaining the guide rod part with a free mechanism of the core accommodation apparatus of this invention. (A) is a figure which shows an up end, (b) is the X section enlarged view of (a), (c) is a figure which shows the time of a fall, (d) is the Y section enlarged view of (c). . It is a plane schematic diagram explaining the positional relationship of the core holding station and core receiving station of the core receiving apparatus of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 and 2, the core receiving device 100 according to the present embodiment includes a core receiving traveling carriage 10 that travels between the core gripping station H and the core receiving station S, and the core receiving operation. The lifting / lowering lifter unit 20 erected on the trolley 10, the lifting / lowering frame unit 30 that holds the core receiving jig 60 and is lifted / lowered by the lifting / lowering lifter unit 20, and the free frame that connects the lifting / lowering frame unit 30 and the lifting / lowering lifter unit 20. The mechanism part 40 and the guide rod part 50 with a free mechanism are provided.

  The core delivery traveling carriage 10 is placed on a substantially rectangular upper frame 1 provided from the core gripping station H to the core accommodation station S. The upper frame 1 is vertically provided with a plurality of support columns 2 attached to the floor surface so as to stand upright on the floor surface. Further, the upper frame 1 is provided with a rail 3 for running the core delivery traveling carriage 10 between the core accommodation station S and the core holding station H and a rack (not shown) parallel to the rail 3. .

  FIG. 3 shows a main part of the core receiving device 100 of the present embodiment. The core delivery truck 10 includes a substantially rectangular carriage frame 11, wheels 12 provided at the four corners of the carriage frame 11, and an electric motor for enabling the core delivery truck 10 to travel, for example, a servo motor. 13 is provided. The main shaft of the servo motor 13 is fitted with a pinion 14 that meshes with a rack provided on the upper frame 1. The wheel 12 is mounted on the rail 3 provided on the upper frame 1, and the rack and pinion mesh with each other by rotating the servo motor 13 in a forward / reverse direction so that the core is delivered. The carriage 10 is moved between the core receiving station S and the core holding station H.

  In addition, an elevating lifter unit 20 is erected at the center of the plane of the bogie frame 11 of the core delivery carriage 10. The lifting / lowering lifter 20 is provided below the lifting / lowering means for raising / lowering the lifting / lowering frame 30, such as a servo cylinder 21, guide pins 22 and holders 23 provided on both sides of the servo cylinder 21, and the servo cylinder 21. The lower frame 24 is provided. The rod 21a and the guide pin 22 of the servo cylinder 21 are integrally attached to the lower frame 24 as shown in FIG. Further, the main body 21 b and the holder 23 of the servo cylinder 21 are integrally attached to the carriage frame 11 through the carriage frame 11. The guide pin 22 is slidably inserted into the holder 23. The lower frame 24 has a substantially H-shape when viewed from above, and connecting shafts 25 (see FIG. 4) for connecting to the free mechanism 40 are formed at the four corners.

  An elevating frame unit 30 connected by the elevating lifter unit 20 and the free mechanism unit 40 is attached immediately below the elevating lifter unit 20. The elevating frame unit 30 includes a rectangular frame 31, arms 32 that hang downward from the four corners of the rectangular frame 31, and power for supplying a power source such as compressed air and electric power to the core receiving jig 60. A source attaching / detaching mechanism 33 is provided. A pin 34 for lifting the core receiving jig 60 is formed on the lower L-shaped portion of the arm 33. The pins 34 are not necessary for all the four arms 34, and may be provided for, for example, two diagonal arms. In addition, the rectangular frame 31 has concave brackets 35 (see FIG. 4) for connecting to the free mechanism 40 at four positions corresponding to the connecting shafts 25 provided on the lower frame 24 of the lifter 20. It is fixed.

  As shown in FIG. 4, the free mechanism 40 that connects the lifting lifter 20 and the lifting frame 30 includes an upper bar member 41 having a spherical plain bearing at the upper end and a lower side having a spherical plain bearing at the lower end. A bar member 42 and a screw member 43 to which the upper bar member 41 and the lower bar member 42 are screwed are provided. The spherical plain bearing at the upper end of the upper bar member 41 is rotatably supported on a connecting shaft 25 provided on the elevating frame 20. The spherical plain bearing at the lower end of the lower bar member 42 is rotatably supported by a joint shaft 36 in a concave portion of a concave bracket 35 provided in the rectangular frame 31 of the elevating frame portion 30. The upper bar member 41 and the lower bar member 42 are fastened by screwing with a screw member 43. In the core holder 100 of the present embodiment, the lifter unit 20 and the lift frame unit 30 are connected by four free mechanism units 40.

  Further, the core receiving device 100 of the present embodiment includes a guide rod portion 50 with a free mechanism that is erected on the elevating frame portion 30 as shown in FIG. . The guide rod portion 50 with a free mechanism has a guide holder 51 and a guide rod 52 inserted through the guide holder 51. The guide holder 51 is fitted to the lower end of the bracket 53 as shown in FIG. The bracket 53 is fixed to the lower surface of the carriage frame 11 of the core delivery traveling carriage 10. On the other hand, the guide rod 52 is suspended and fixed on the rectangular frame 31 of the elevating frame portion 30. The guide rod 52 has a diameter that fits to the guide holder 51 as shown in FIG. 5B when the servo cylinder 21 of the lifter lifter 20 is at the rising end, and as shown in FIG. 5D when lowered. The guide holder 51 is manufactured to have a diameter that forms a gap. In addition, in the core accommodation apparatus 100 of this embodiment, the guide rod part 50 with a free mechanism is provided in two places as shown to Fig.3 (a).

  Next, the movement of the above-described core storage device 100 will be described. The core C is transported from the core preparation station P shown in FIG. 6 to the core receiving station S via the core gripping station H. The core C is first set on the core setting lower jig 61 by the operator at the core preparation station P. The core set lower jig 61 is fixedly placed on the core set lower jig carriage 62 as shown in FIG. The core set lower jig carriage 62 is placed on a traverser 63 that travels between the core preparation station P and the core gripping station H. The core set lower jig carriage 62 is provided with a positioning bush 62a through which the positioning pin 60a of the core receiving jig 60 is inserted.

  The core set lower jig 61 in which the core C is set at the core preparation station P is conveyed to the core holding station H by the traverser 63 together with the core set lower jig carriage 62. On the core set lower jig 61 and the core set lower jig carriage 62 conveyed to the core gripping station H, the core receiving jig 60 held by the elevating frame unit 30 stands by. The core receiving jig 60 and the elevating frame part 30 are lowered toward the core setting lower jig 61 by the elevating lifter part 20. The core receiving jig 60 is provided with positioning pins 60a (see FIG. 1) inserted into the positioning bushes 62a of the core set lower jig carriage 62. The positioning pins 62a are fitted with the positioning bushes 62a of the core set lower jig carriage 62, whereby the horizontal positioning for holding the core C set on the core set lower jig 61 is performed. The core receiving jig 60 is further provided with gripping means (not shown), and the core C of the core setting lower jig 61 is gripped and held by the gripping means. The power source attaching / detaching mechanism 33 provided in the elevating frame unit 30 supplies power for operating the gripping means.

  When the elevating frame unit 30 is waiting on the core set lower jig 61, that is, when the elevating frame unit 30 is at the ascending end, the guide rod unit 50 with the free mechanism is as shown in FIGS. The guide holder 51 and the guide rod 52 are fitted with a clearance of 0. Thereafter, when the servo cylinder 21 of the lifting / lowering lifter section 20 is operated to lower the core receiving jig 60 and the lifting / lowering frame section 30, the guide holder 51 and the guide rod 52 of the guide rod section 50 with the free mechanism are shown in FIG. c) As shown in (d), a gap is formed between the guide holder 51 and the guide rod 52, and the lowering is performed.

  When the core receiving jig 60 and the elevating frame portion 30 continue to descend, the positioning pins 60a of the core receiving jig 60 are inserted into the positioning bushes 62a of the core setting lower jig carriage 62. At this time, the positioning pin 60a and the positioning bush 62a may be displaced. However, since the lifting / lowering frame part 30 is connected to the lifting / lowering lifter part 20 by the free mechanism part 40 having spherical slide bearings at the upper and lower ends, the lifting / lowering frame part 30 can move in the horizontal direction by the amount of displacement. Thereby, the positioning pin 60a is inserted into the positioning bushing 62a without applying an excessive load. As described above, the guide rod portion 50 with the free mechanism has the guide holder 51 and the guide rod 52 of the guide rod portion 50 with the free mechanism when the core receiving jig 60 and the lifting frame portion 30 are lowered. Since a gap is formed between them, the movement of the free mechanism portion 40 is not restricted.

  Further, the core receiving jig 60 and the lifting frame 30 are continuously lowered. When the core C is held, the servo cylinder 21 of the lifting lifter 20 is stopped, and the core receiving jig 60 and the lifting frame section are stopped. Stop descent of 30. Then, the core C is gripped by the gripping means provided in the core receiving jig 60.

  Thereafter, while holding the core C, the servo cylinder 21 of the lifting / lowering lifter unit 20 is operated to raise the core fitting jig 60 and the lifting frame unit 30. When the elevating frame part reaches the ascending end, the guide mechanism 51 with the free mechanism is fitted with the guide holder 51 and the guide rod 52 with no gap. Thereby, the raising / lowering frame part 30 is fixedly connected to the core-contained outbound cart 10.

  Subsequently, the core delivery truck 10 is moved from the core holding station H to the core delivery station S. As described above, the elevating frame portion 30 is fixed to the core receiving forward carriage 10 by the guide rod portion 50 with the free mechanism, so that the core receiving jig 60 and the core C are shaken by the free mechanism 40. There is no.

  At the core receiving station S, a lower frame (main mold) 64 containing a mold placed on a surface plate carriage moving on a molding line is fixed and stopped by a positioning device 65. The lower frame 64 is provided with a positioning bush 64a through which the positioning pin 60a of the core receiving jig 60 is inserted. The positioning pins 60a and the positioning bushes 64a are fitted to each other so that the horizontal positioning for accommodating the core C is performed.

  The core receiving jig 60 and the lifting / lowering frame unit 30 moved to the core storing station S are lowered toward the lower frame 64 by the servo cylinder 21 of the lifting / lowering lifter unit 20. At this time, the core receiving jig 60 and the elevating / lowering frame unit 30 move in the same manner as when the core C is gripped by the core gripping station H.

  When the elevating frame portion 30 is at the rising end, the guide rod portion 50 with free mechanism is fitted with the guide holder 51 and the guide rod 52 having a clearance of 0 as shown in FIGS. After that, when the servo cylinder 21 of the lifting / lowering lifter unit 20 is operated to lower the core receiving jig 60 and the lifting / lowering frame unit 30 toward the lower frame 64, the guide holder 51 and the guide rod of the guide rod unit 50 with a free mechanism 52, a gap is formed between the guide holder 51 and the guide rod 52 as shown in FIGS.

  When the core receiving jig 60 and the elevating frame portion 30 continue to descend, the positioning pins 60a of the core receiving jig 60 are inserted into the positioning bushes 64a of the lower frame 64. At this time, the positioning pin 60a and the positioning bush 64a may be misaligned. However, since the elevating frame portion 30 is connected to the elevating lifter portion 20 by the free mechanism portion 40, it can move by the amount of misalignment. As a result, the positioning pin 60a is inserted into the positioning bush 64a without being subjected to an excessive load. The guide rod portion 50 with a free mechanism forms a gap between the guide holder 51 and the guide rod 52 of the guide rod portion 50 with the free mechanism when the core receiving jig 60 and the lifting frame portion 30 are lowered. Therefore, the movement of the free mechanism 40 is not restricted.

  Further, the core receiving jig 60 and the lifting frame 30 are continuously lowered, and when the core C reaches the core storing position, the servo cylinder 21 of the lifting lifter 20 is stopped, and the core receiving jig 60 and the lifting frame 30 are stopped. Stop descent of part 30. Thereafter, the holding means provided in the core receiving jig 60 is operated to release the holding of the core C, whereby the core C is stored in the main mold. FIG. 2 shows a state in which the elevating frame portion 30 is lowered.

  In this embodiment, as shown in FIG. 6, the core preparation stations P are provided at two locations, and the core set lower jig carriage on which the core set lower jig 61 is placed is connected to the core preparation station P and the core preparation station P. Although it conveys alternately between the child holding stations H, it is not restricted to this. The core C may be set on the core setting lower jig 61 at the core holding station H without providing the core preparation station P at a position different from the core holding station H. A plurality of core preparation stations P and core holding stations H as in the present embodiment may be provided in parallel. When the core preparation station P is provided at two locations as in the present embodiment, the core C set on the other side is set as the main while the core C is set on one core preparation station P. It can be stored in a mold, and the productivity of the mold can be improved.

  Further, in the core receiving device 100 of the present embodiment, the guide rod portion 50 with a free mechanism that is erected on the elevating frame portion 30 is connected to the core receiving outbound cart 10, but is connected to the elevating lifter portion. It doesn't matter.

  Further, in the present embodiment, the servo cylinder 21 is used as the lifting means of the lifting / lowering lifter section 20, but the present invention is not limited to this, and a hydraulic cylinder or a pneumatic cylinder may be used. Furthermore, other lifting means using gears or chains may be used as long as the lifting frame 30 can be raised and lowered. When the servo cylinder 21 is used as the lifting means as in this embodiment, accurate position control and speed control can be easily performed.

  Further, in this embodiment, the rack and pinion is used as the transport mechanism of the core delivery carriage 10, but the present invention is not limited to this, and a transport mechanism using a chain or a belt may be used. A conveyance mechanism using a cylinder of a pressure type or an electric type may be used. In this embodiment, the servo motor 13 is used as a power source for the rack and pinion. However, the present invention is not limited to this, and an induction motor may be used. When the servo motor 13 is used, accurate position control and speed control can be easily performed.

  As described above, since the lifting / lowering lifter unit 30 holding the core receiving jig having the positioning pins is connected to the lifting / lowering lifter unit 20 by the free mechanism unit 40, the core receiving device 100 has a structure for the core storage jig. When the positioning bushing of the positioning pin and the core set lower jig or the positioning bushing of the lower frame 64 is displaced, the displacement is absorbed by the free mechanism 40 to prevent the positioning pin and the lifter / lifter from being damaged. Can do.

  The core storage device 100 is further provided with a free mechanism that fits the guide holder 51 and the guide rod 52 at the rising end of the elevating frame 30 and forms a gap between the guide holder 51 and the guide rod 52 when lowered. Since the guide rod portion 50 is erected on the elevating frame portion and is connected to the core receiving outbound cart 10, the elevating frame portion 30 is fixed to the core receiving outbound cart 10 at the rising end of the elevating frame portion 30. When the elevating frame portion 30 is lowered, the free mechanism portion 50 can be lowered without restricting the movement. As a result, when the core delivery truck 10 moves between the core gripping station H and the core storage station P, it is possible to prevent the elevating frame portion 30 from shaking, and to prevent damage to the core C and the like. .

H Core Grab Station S Core Filling Station 10 Core Rolling Dolly 20 Lifting Lifter 30 Lifting Frame 40 Free Mechanism 50 Guide Rod with Free Mechanism 51 Guide Holder 52 Guide Rod

Claims (2)

A core delivery carriage that travels between the core grab station and the core delivery station;
An elevating lifter unit standing on the core delivery truck,
An elevating frame part that holds the core receiving jig and is raised and lowered by the elevating lifter part;
A free mechanism unit that connects the elevating frame unit and the elevating lifter unit;
A core storage device with And a guide rod portion with a free mechanism that is erected on the elevating frame portion and connected to the core delivery outbound carriage or the elevating lifter portion,
The guide rod portion with a free mechanism has a guide holder and a guide rod inserted through the guide holder,
At the rising end of the lifting frame part, the guide holder and the guide rod are fitted,
The core receiving device according to claim 1, wherein a gap is formed between the guide holder and the guide rod when the elevating frame portion is lowered.