JP2016036814A - Gripping device for core for casting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gripping device for a core for casting which has a simple structure and a small space required for operation.SOLUTION: A gripping device is equipped with a gripping mechanism 1, and a lifting mechanism for lifting the gripping mechanism 1. The gripping mechanism 1 is equipped with a claw so configured as to be capable of horizontally displacing along an underside of an end part of a core 2 for casting, and a pressing member 8 which presses the core 2 for casting downwards prior to lowering of the claw 5 to a level corresponding to the underside of the end part of the core 2 for casting. The core 2 for casting can be reliably gripped in two step processes such that the lifting mechanism lowers the gripping mechanism 1, and consequently, the pressing member 8 presses the core 2 for casting, and the claw 5 enters underside the end part of the core 2 for casting in a pressed state.SELECTED DRAWING: Figure 6

Description

  The present invention relates to gripping of a casting core when the casting core is set in a casting mold.

  Regarding the efficiency of casting work using a casting core, Patent Document 1 discloses that a cast product is taken out from a mold, the mold is cleaned, and a new casting core is set in the mold. We have proposed a casting product extraction / core setting device that can

  According to this apparatus, since many parts of the casting work can be performed by one apparatus, it is not necessary to consider the interference of the operation between apparatuses compared to the case of using an individual apparatus for each work. The repetition interval can be shortened.

JP 2012-179643 A

  The device of Patent Document 1 is set in a lower mold in a state where both ends of a casting core are held by clamps.

  However, in this casting core gripping structure, the clamp that grips the casting core has a structure that sandwiches the casting core from above and below, so that the casting core can be taken out into a casting core setting device. When setting, it is necessary to move the casting core into the clamp from the horizontal direction and grip it from the vertical direction by the clamp, and it is necessary to secure a space for these operations. Further, it is difficult to grip only one side of the casting core.

  The present invention has been made to solve the above-mentioned problems related to the holding of a casting core, and an object thereof is to provide a casting core holding device having a simple structure and a small space required for operation.

  A casting core gripping device according to an embodiment of the present invention includes a lifting mechanism that is displaced in the vertical direction and a gripping mechanism supported by the lifting mechanism. The gripping mechanism includes a claw that is horizontally displaced along the bottom surface of the end of the casting core, and a claw that is being cast before the claw is lowered to a level corresponding to the bottom surface of the end of the casting core. And a pressing member that presses the child downward.

  When the lifting mechanism lowers the gripping mechanism toward the casting core, the pressing member presses the casting core downward before the claw descends to the level of the lower surface of the end of the casting core. . While the casting core is pressed and held by the pressing member, the claw is horizontally displaced along the lower surface of the end portion of the casting core so that the casting core is sandwiched between the pressing member and the pair of claws. Is done. That is, the gripping operation of the casting core can be performed only by the lowering of the gripping mechanism and the horizontal displacement of the claw. Therefore, the casting core can be stably held with a simple configuration, and the space required for the holding operation can be kept small.

It is a principal part side view of the holding apparatus of the core for casting by embodiment of this invention. Although it is similar to FIG. 1, the state which the pressing member pressed the core for casting is shown. Although similar to FIG. 1, the gripping operation of the casting core by the claws is shown. Similar to FIG. 1 but showing the action of the gripping device lifting the casting core. Fig. 2 shows a gripping device similar to Fig. 1 but with the main part surrounded by a wire mesh. It is the side view to which the principal part of the holding | gripping apparatus was expanded. It is the top view to which the principal part of the holding | gripping apparatus was expanded.

  Referring to FIG. 1, a casting core gripping device according to an embodiment of the present invention grips and lifts a casting core 2 placed on a base 10 in a predetermined position, and is not shown. Used to set a predetermined position on the lower mold of the mold.

  For this purpose, the gripping device includes a gripping mechanism 1 shown in the figure and a lifting mechanism (not shown) that lifts and lowers the entire gripping mechanism 1.

  The gripping mechanism 1 is supported by an elevating mechanism and has a plurality of claws 5 that are horizontally displaced along the lower surface of the end portion of the casting core 2, and the lower surface of the end portion of the casting core 2. Prior to lowering to a level corresponding to the above, a plurality of pressing members 8 for pressing the casting core 2 downward is provided.

  In order to displace the claw 5 in the horizontal direction, the gripping mechanism 1 is coupled to an air cylinder 4 that expands and contracts in the horizontal direction, and a pair that extends outward in the horizontal direction, coupled to the distal end and the proximal end of the air cylinder 4. The plate 3 is provided.

  Referring to FIG. 7, the pair of plates 3 are formed with notches and holes for avoiding interference with the pressing member 8 and for maintaining the gripping mechanism 1. The gripping mechanism 1 displaces the pair of plates 3 only in the horizontal direction and in the directions approaching and separating from each other. For this purpose, the gripping mechanism 1 includes a plurality of guide rods 9 arranged in parallel with the air cylinder 4 for guiding the pair of plates 3 in a horizontal and linear direction.

  Referring to FIG. 6, the plurality of claws 5 are supported by the pair of plates 3 via the arms 6 extending in the vertical direction. Specifically, the claw 5 facing the same direction among the plurality of claws 5 is supported by one of the pair of plates 3, and the other claw 5 facing the same direction among the plurality of claws 5 is supported by the pair of plates 3. Supported by the other side. In this way, the two groups of claws 5 facing in opposite directions are locked to one and the other of the pair of plates 3 for each group.

  The arm 6 preferably penetrates the plate 3 upward and is locked to the plate 3 at a predetermined penetration position. By configuring the support structure of the arm 6 to the plate 3 in this way, the protruding length of the arm 6 protruding downward from the plate 3 can be changed as necessary.

  The claw 5 is fixed in advance at a position corresponding to the lower end of the arm 6.

  Referring again to FIG. 7, each plate 3 is disposed so as to straddle the plurality of guide rods 9, thereby restricting the direction of displacement to the linear direction. A plurality of pressing members 8 are supported on the guide rod 9.

  The pressing member 8 is composed of a pin elastically supported downward on the guide rod 9 by a coil spring. In order to provide a plurality of pressing members 8 inside the opposing claws 5, as shown in FIG. 7, a beam is fixed to a plurality of guide rods 9, and the beam elastically supports the pressing member 8. The number of pressing members 8 can be arranged.

  Next, the operation of the gripping device including the gripping mechanism 1 will be described.

  As shown in FIG. 1, the gripping device is moved above the casting core 2 placed on the base 10 at a fixed position, and the gripping mechanism 1 is lowered onto the casting core 2 via the lifting mechanism. Let

  As shown in FIG. 2, the gripping mechanism 1 is lowered to a height at which the claws 5 correspond to the lower surfaces of both ends of the casting core 2. During the lowering, the pressing member 8 comes into contact with the casting core 2 and presses the casting core 2 against the base 10.

  When the claw 5 is lowered to a level corresponding to the lower surfaces of both ends of the casting core 2, the lowering of the gripping mechanism 1 is stopped and the air cylinder 4 is driven to contract as shown in FIG. As a result, the plates 3 respectively connected to the front end and the base end of the air cylinder 4 are guided by the guide rod 9 and displaced in the horizontal direction and in the directions approaching each other. The claw 5 supported by the plate 3 via the arm 6 is also displaced in the same direction. As a result, the plurality of claws 5 enter between the casting core 2 and the base 10 along the lower surfaces of both ends of the casting core 2.

  In order to allow the claw 5 to enter, a gap for allowing the claw 5 to enter is previously formed in the base 10 between the casting core 2. Further, the notches and holes of the plate 3 serve to prevent the horizontal displacement of the plate 3 and the pressing member 8 from interfering with each other. The operation in which the claw 5 enters the gap between the base 10 and the casting core 2 is a state in which the plurality of pressing members 8 apply an elastic force downward to the casting core 2 and press the casting core 2 against the base 10. Is done. Therefore, the casting core 2 does not move due to the movement of the claw 5 into the gap, and all the claw 5 can be correctly entered below the end of the casting core 2.

  When all the claws 5 have entered the lower side of the end of the casting core 2, the contraction of the air cylinder 4 is stopped at that position. In this state, the lifting mechanism is driven to lift the gripping mechanism 1. At this time, the casting core 2 is clamped by a plurality of pressing members 8 that elastically press the casting core 2 downward from above and a plurality of claws 5 that support the casting core 2 upward. . Further, the arm 6 that supports the claw 5 regulates the horizontal displacement of the casting core 2. Therefore, the casting core 2 rises from the table 10 while being stably held by the holding mechanism 1.

  In this manner, the gripping mechanism 1 is moved in a state where the gripping mechanism 1 grips the casting core 2, and the casting core 2 is set at a predetermined position of the lower mold of the mold. After the casting core 2 is set at a predetermined position of the lower die, when the air cylinder 4 is driven to extend, the plurality of claws 5 are moved to the lower surfaces of both ends of the casting core 2 via the pair of plates 3 and the plurality of arms 6. Retreat from. If the gripping mechanism 1 is raised by the lifting mechanism in this state, the gripping mechanism 1 is separated from the casting core 2.

  As described above, the gripping mechanism 1 first presses the casting core 2 downward with the pressing member 8 and causes the claw 5 to enter the lower side of the end of the casting core 2 in the pressed state. The casting core 2 is gripped by the above process. That is, the gripping mechanism 1 does not require a dedicated actuator for driving the pressing member 8, and the claw 5 only needs to be displaced in the linear direction, so that the gripping mechanism 1 can be driven only by driving one air cylinder 4. The casting core 2 can be held and released. Therefore, the casting core 2 can be stably held with a simple structure, and the space necessary for the operation of the claw 5 can be kept small.

  Since the gripping mechanism 1 includes a plurality of pressing members 8 and a plurality of claws 5 that are displaced toward or away from each other in the horizontal direction, the gripping core 2 having a complicated shape can be gripped stably. Can be done.

  Further, since one air cylinder 4 drives all the claws 5, the number of actuators necessary for gripping the casting core 2 can be minimized.

  Further, the claw 5 facing the same direction is supported by one of the pair of plates 3 and the other claw 5 facing the same direction is supported by the other of the pair of plates 3, so that one air cylinder 4 contracts. All the claws 5 can enter the lower side of the casting core 2 only by the operation.

  Since the pressing member 8 is supported by the guide rod 9, it is not affected by the displacement of the plate 3, and the pressing operation of the casting core 2 by the pressing member 8 and the claw below the end of the casting core 2 are performed. 5 intrusion operations can be performed cooperatively without interfering with each other.

  Further, since the pressing member 8 is composed of a pin supported by a coil spring, the casting core 2 can be mounted with a simple structure by simply lowering the gripping mechanism 1 by an elevating mechanism without requiring an actuator. 10 can be pressed.

  The casting core 2 gripping device configured as described above does not require any manual work for gripping and opening the casting core 2. Therefore, as shown in FIG. 5, by covering the entire portion below the plate 3 of the gripping mechanism 1 with the wire mesh 20, it is possible to ensure the safety of the gripping device and use the gripping device in a particularly narrow working space. A favorable effect is obtained for ensuring safety in the case. Note that the wire mesh 20 is preferable to covering the gripping mechanism 1 with another material in that it does not hinder the visual confirmation that the casting core 2 is securely gripped by the gripping mechanism 1 and is lightweight. .

  As described above, the present invention has been described through specific embodiments. However, the present invention is not limited to the above embodiments. A person skilled in the art can make various modifications or changes to the above-described embodiments within the scope of the claims.

  For example, in the above embodiment, the casting core 2 is held using the plurality of claws 5 and the plurality of pressing members 8. However, the number of claws 5 and pressing members 8 can be arbitrarily set according to the shape and dimensions of the casting core 2. For example, when the casting core 2 has a rod shape, only one end of the casting core 2 may be held by the single claw 5 and the single pressing member 8.

DESCRIPTION OF SYMBOLS 1 Grasp mechanism 2 Casting core 3 Plate 4 Air cylinder 5 Claw 6 Arm 8 Press member 9 Guide rod 10 Base 20 Wire mesh

Claims (7)

In a casting core gripping device,
An elevating mechanism that is displaced in the vertical direction, and a gripping mechanism supported by the elevating mechanism,
The gripping mechanism is
A claw horizontally displaced along the lower surface of the end of the casting core;
A pressing member that is elastically supported by the elevating mechanism and presses the casting core downward before the claw descends to a level corresponding to the lower surface of the end of the casting core. A casting core gripping device characterized by that.   A plurality of claws that are supported by the elevating mechanism and that are displaced along the lower surface of the end portion of the casting core in the horizontal direction and in a direction away from each other, and elastically supported by the elevating mechanism, A plurality of pressing members for pressing the casting core downward before the plurality of claws descend to a level corresponding to the lower surface of the end of the casting core. The casting core gripping device according to claim 1.   A plurality of arms extending upward from each of the plurality of claws; and a telescopic cylinder that drives the plurality of arms in a direction in which the plurality of claws approach each other and in a direction away from each other with respect to a horizontal direction. The casting core holding device according to claim 2.   A pair of plates that are displaced in a direction approaching and separating from each other with respect to the horizontal direction in accordance with the expansion and contraction of the telescopic cylinder, and the pair of arms in which the directions of the claws are directed in the same direction. 4. The arm according to claim 3, wherein one of the plurality of arms is locked, and an arm of the plurality of arms having the direction of the claw directed to another same direction is locked to the other of the pair of plates. The casting core gripping device as described.   The casting core gripping device according to claim 4, further comprising a guide rod for guiding the pair of plates in a horizontal direction, wherein the pressing member is supported by the guide rod.   The said pressing member is comprised with the pin elastically supported by the said guide rod downward via the coil spring, The holding apparatus of the core for casting of Claim 5 characterized by the above-mentioned.   The casting core gripping device according to claim 1, wherein the claw and the pressing member are surrounded by a wire mesh.

Images