Neutron removal device

Abstract

To simply oscillate a cast compact without making a device large-scale.SOLUTION: A jig body 26, which supports a cast compact 90, is so fixed to a vehicle body 40 as to be capable of oscillating via elastic bodies 24a, 24a, 24a, 24b, 24b, 24b, and a projection piece 30c of the jig body 26 is pulled by a working robot 6 in a direction that a block body 32 separates from a stopper block 23. When the block body 32 has separated from the stopper block 23 by a prescribed distance, engagement between a hook part 62a of the working robot 6 and the projection piece 30c is released. By this, the jig body 26 which supports the cast compact 90 can be oscillated with simple configuration. Further, oscillation of the jig body 26 is accompanied by collision of the block body 32 with the stopper block 23, and therefore, core pulverization and core detachment from the cast compact 90 can be promoted by utilizing an impact force when the block body 32 collides with the stopper block 23.SELECTED DRAWING: Figure 15

Description

[Technical Field]

[0001] The present invention relates to a core removal device for removing a core from a casting body having a core. [Background technology]

[0002] Japanese Patent Publication No. 2017-192949 (Patent Document 1) describes a core removal device that includes a frame body, an impact unit fixed to the frame body, a vibration generating unit fixed to the frame body, and a control unit that controls the impact unit and the vibration generating unit, and that removes cores from a cast molded body by striking the cast molded body set on the frame body via a receiving stand with the impact unit while vibrating the cast molded body via the frame body with the vibration generating unit.

[0003] The core removal device uses an impact unit to crush the core and remove it from the inner wall of the cast molded body, and uses a vibration generating unit to collide the crushed cores with each other or with the inner wall of the cast molded body, so that the cores can be crushed into smaller pieces and properly removed from the cast molded body. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-192949 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the core removal device described in the above-mentioned publication is configured so that a motor serving as a vibration generating unit is fixed to a frame body to vibrate the cast molding, and the frame body itself is vibrated, making the device large and complex, and there is still room for improvement in terms of making the device more compact and simple.

[0006] The present invention has been made in consideration of the above, and aims to provide a core removal device that can easily vibrate a casting molded body without making the device large-scale. [Means for solving the problem]

[0007] The core removal device of the present invention employs the following means to achieve the above-mentioned object.

[0008] According to a preferred embodiment of the core removal device of the present invention, there is provided a core removal device for removing a core from a cast body having a core. The core removal device includes a base, an elastic body fixed to the base, a cast body support part supported on the base via the elastic body, an abutment part fixed to the base, and a position change part having an engagement part engageable with a second predetermined location of the cast body support part. The cast body support part is capable of supporting the cast body. The abutment part is capable of abutting against a first predetermined location of the cast body support part. The position change part is capable of changing the position of the cast body support part in a direction away from the abutment part within the elastic range of the elastic body. Furthermore, the position change part is capable of releasing the engagement of the engagement part with the second predetermined location after the cast body support part has changed position.

[0009] According to the present invention, the position changer changes the position of the cast body support part in a direction away from the abutment part at the second predetermined location, and after the position change, the engagement part disengages from the second predetermined location. The elastic body elastically deforms as the position change of the cast body support part occurs. When the engagement part disengages from the second predetermined location, the elastic force (restoring force) of the elastic body causes the cast body support part to return to its original position. Due to inertia, the cast body support part attempts to change its position beyond its original position (position) (in a direction opposite to the direction of the position change by the position changer), but this position change is prevented by the cast body support part colliding with the abutment part at the first predetermined location. Then, due to the reaction force of the collision of the first predetermined location with the abutment part, the cast body support part is again changed in the same direction as the position change by the position changer. Subsequently, the position change accompanied by the collision of the first predetermined location with the abutment part is repeated until the vibration of the cast body support part caused by the elastic body converges. In this way, the cast molded body can be vibrated with a simple configuration in which the position of the cast molded body support part is changed in a direction in which the first predetermined point moves away from the abutment part, and then the engagement part is released from the engagement with the second predetermined point after the position change. Furthermore, the impact force generated when the second predetermined point collides with the abutment part can be used to promote crushing of the core and separation of the core from the cast molded body.

[0010] According to a further aspect of the core removal device of the present invention, the position changing portion can change the position of the cast body support portion by pulling the second predetermined portion via the engaging portion.

[0011] According to this aspect, the position of the cast body support portion can be changed in a direction in which the second predetermined portion moves away from the abutment portion with a simple configuration in which the second predetermined portion is simply pulled via the engagement portion.

[0012] According to a further aspect of the core removal device of the present invention, the second predetermined location is located on the opposite side of the elastic body from the base.

[0013] According to this embodiment, the cast molded body support portion can be tilted using the elastic body as a fulcrum, so that the second predetermined location can be separated from the abutting portion with a small force. Moreover, when the engagement portion is released from the second predetermined location, the second predetermined location can be caused to collide with the abutting portion with a collision force greater than the force required to tilt the cast molded body support portion. This can more effectively promote the core's crushing and separation from the cast molded body. Note that the greater the distance between the second predetermined location and the elastic body, the smaller the force required to separate the second predetermined location from the abutting portion.

[0014] In a further embodiment of the core removal device according to the present invention, the position changing unit is capable of subjecting the cast body to a predetermined treatment, which typically refers to a treatment for removing the core from the cast body, such as striking the cast body with a hammer or the like, crushing the core with air or a drill, or transporting the cast body to a treatment area.

[0015] According to this embodiment, there is no need to provide a dedicated unit solely for changing the position of the support for the cast compact, which is rational because the position of the support for the cast compact can be changed by using a device for removing the core from the cast compact, such as a device for striking the cast compact with a hammer or the like, a device for crushing the core with air or a drill, or a device (robot) for transporting the cast compact to a processing area.

[0016] According to a further aspect of the core removal device of the present invention, the second predetermined location is located on the opposite side of the elastic body from the base, and the position changing unit is capable of performing a predetermined treatment on the cast compact.

[0017] According to this embodiment, the casting molded body support part can be tilted using the elastic body as a fulcrum, allowing the second predetermined location to be separated from the abutting part with a small force. Furthermore, when the engagement part is released from the second predetermined location, the second predetermined location can be caused to collide with the abutting part with a collision force greater than the force required to tilt the casting molded body support part. This more effectively promotes core crushing and core separation from the casting molded body. The greater the distance between the second predetermined location and the elastic body, the smaller the force required to separate the second predetermined location from the abutting part. Furthermore, there is no need to provide a dedicated device solely for changing the position of the casting molded body support part. This is rational because the position of the casting molded body support part can be changed using a device for removing the core from the casting molded body, such as a hammer or other device for crushing the core with air or a drill, or a device (robot) for transporting the casting molded body to a processing area. [Effects of the Invention]

[0018] According to the present invention, the casting body can be easily vibrated without requiring a large-scale device. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a schematic diagram showing an outline of the configuration of a core removal device 1 according to an embodiment of the present invention. [Figure 2] 1 is a plan view of a core removal device 1 according to an embodiment of the present invention, viewed from above. [Figure 3] 1 is a view of a core removal device 1 according to an embodiment of the present invention, viewed from the upstream side in the conveying direction of a jig cart 4. FIG. [Figure 4] FIG. 2 is a side view of the jig cart 4 as seen from a direction perpendicular to both the conveying direction and the vertical direction. [Figure 5] 10 is an explanatory diagram showing the rotation of rails R, R arranged in a work area WA. FIG. [Figure 6] FIG. 2 is a front view of the jig carriage 4 as seen from the upstream side in the conveying direction. [Figure 7] FIG. 2 is a plan view of the jig carriage 4 seen from above. [Figure 8] FIG. 2 is a three-view diagram showing the jig carriage 4 supporting the cast body 90. [Figure 9] FIG. 2 is a side view of the working robot 6. [Figure 10] FIG. 2 is a plan view of the work robot 6. [Figure 11] FIG. 2 is an enlarged view of a main part of the robot arm 60. [Figure 12] FIG. 2 is a front view of the jig carriage 4 supporting the cast body 90, as viewed from the upstream side in the conveying direction. [Figure 13] 10 is an explanatory diagram showing the rotation of the sand receiving pan SP. FIG. [Figure 14] 10 is an explanatory view showing the state of engagement between a hook portion 62a and a hooking block 40a. FIG. [Figure 15] 10 is an explanatory view showing a state in which the jig body 26 is tilted. FIG. [Figure 16] 10 is an explanatory view showing the state of engagement between the hook portion 62a and the protruding piece 30c. FIG. [Figure 17] 10 is an explanatory view showing the state of engagement between a hook portion 62a and a pushing block 40b. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0020] Next, the best mode for carrying out the present invention will be described using examples. [Example]

[0021] The core removal device 1 according to an embodiment of the present invention is configured as an apparatus for removing a core from a casting molded body 90 having a core, and as shown in Figures 1 to 3, comprises a frame 2 surrounding a work area WA, a pair of rails R, R laid inside and outside the frame 2 so as to penetrate the work area WA, a jig cart 4 arranged on the pair of rails R, R, a work robot 6 arranged adjacent to the work area WA within the frame 2, lifters 8, 8 (shown only in Figures 1 and 3) arranged below the pair of rails R, R in the work area WA, a sand receiving pan SP (shown only in Figures 2 and 3) arranged below the pair of rails R, R in the work area WA, a sand discharge cart 10 (shown only in Figures 2 and 3) arranged adjacent to the work area WA within the frame 2, and a control unit 12 (shown only in Figure 1) that controls the entire device.

[0022] In this embodiment, for the sake of convenience, the upper side in the vertical direction (the upper side in FIG. 1) is defined as the "upper side" or "upper," and the lower side in the vertical direction (the lower side in FIG. 1) is defined as the "lower side" or "lower." Furthermore, the direction in which the jig cart 4 is transported from the setting area SA (described later) to the removal area TA via the working area WA (left direction in FIG. 1) is defined as the "transport direction." Furthermore, the right side (upper side in FIG. 2) facing the transport direction (left side in FIG. 2) is defined as the "right side" or "rightward," and the left side (lower side in FIG. 2) facing the transport direction (left side in FIG. 2) is defined as the "left side" or "leftward."

[0023] 1 and 2, a pair of rails R, R are laid inside and outside the frame 2 so that the jig cart 4 can be transported from the setting area SA outside the work area WA to the work area WA, and from the work area WA to the removal area TA outside the work area WA. The rails R, R are arranged at a predetermined height above the floor F by a plurality of supports (not shown). In other words, it can be said that there is a space below the pair of rails R, R.

[0024] As shown in Fig. 5, the rails R, R arranged in the work area WA have a fulcrum RS1 at the end on the upstream side (right side in Fig. 5) in the running direction (transport direction) of the jig cart 4, and are configured to be rotatable around the fulcrum RS1. The fulcrum RS1 extends in a direction perpendicular to both the extension direction of the rails R, R (the running direction (transport direction) of the jig cart 4) and the vertical direction.

[0025] Furthermore, a pair of beams Bm, Bm are arranged between the rails R, R arranged in the work area WA so as to connect the support columns (not shown) supporting the rails R, R (FIGS. 3 and 5). The beams Bm, Bm are arranged at a distance substantially equal to the length of the jig cart 4 along the running direction (transport direction, leftward in FIG. 5). More specifically, one beam Bm is arranged at a position corresponding to the front end (left end in FIG. 1) of a car body 40 (described later) of the jig cart 4, and the other beam Bm is arranged at a position corresponding to the rear end (right end in FIG. 1) of the car body 40. That is, when the jig cart 4 reaches the work area WA, one beam Bm is located directly below the front end of the car body 40, and the other beam Bm is located directly below the rear end of the car body 40. As shown in FIG. 12, the beams Bm, Bm each have a pair of stopper blocks SB1, SB2.

[0026] The stopper block SB1 is arranged on the rail R arranged on the left side (left side in FIG. 12) in the running direction (transport direction, direction perpendicular to the paper surface in FIG. 12) of the jig cart 4, i.e., on the side of the rail R with which a wheel 42L (described later) of the jig cart 4 engages, and the stopper block SB2 is arranged on the rail R arranged on the right side (right side in FIG. 12) in the running direction (transport direction, direction perpendicular to the paper surface in FIG. 12) of the jig cart 4, i.e., on the side of the rail R with which a wheel 42R (described later) of the jig cart 4 engages. The distance between the stopper blocks SB1 and SB2 is greater than the width dimension (left-right dimension in the running direction (transport direction) of the jig cart 4) of the car body 40 of the jig cart 4. The stopper blocks SB1 and SB2 have notches Nt1 and Nt2 on their surfaces facing each other. The notches Nt1, Nt2 have a substantially C-shape when viewed from the running direction (transport direction, a direction perpendicular to the paper surface in FIG. 12) of the jig cart 4, and penetrate in the running direction (transport direction, a direction perpendicular to the paper surface in FIG. 12) of the jig cart 4. The upper surfaces (upper surfaces in FIG. 12) of the notches Nt1, Nt2 are set at positions where stopper bars 41, 41 of the car body 40 (described later) come into contact when the wheels 42L, 42R of the jig cart 4 are disengaged from the rails R, R and the wheels 42L, 42R and the rails R, R are spaced a predetermined distance apart when the jig cart 4 is raised (upward in the vertical direction).

[0027] As shown in Figures 4, 6 to 8, the jig cart 4 has a body 40, four pairs of left and right wheels 42R, 42L rotatably supported on the body 40, and a jig 20 fixed to the body 40.

[0028] As shown in FIGS. 4, 7, and 8, the vehicle body 40 has a hooking block 40a and a pushing block 40b that can be engaged with a hooking portion 62a (described later) of the work robot 6, a front sand collection plate 40c and a rear sand collection plate 40d, and stopper bars 41, 41. The hooking block 40a is located at the front right corner in the running direction (transport direction) of the jig cart 4. The pushing block 40b is located at the rear right corner in the running direction (transport direction) of the jig cart 4. As shown in FIG. 4, the front sand collection plate 40c is inclined upward in the running direction (transport direction, leftward in FIG. 4) of the jig cart 4. The rear sand collection plate 40d is inclined downward in the running direction (transport direction, leftward in FIG. 4) of the jig cart 4. In other words, the front sand collection plate 40c and the rear sand collection plate 40d have a downward slope as they approach each other. As shown in FIGS. 4 and 8, the stopper bars 41 are fixed to the downward (downward in FIG. 4) surface (the surface facing the floor) of the vehicle body 40. The stopper bars 41 are located at the front end (the front end in the traveling direction (transport direction) of the jig cart 4) and the rear end (the rear end in the traveling direction (transport direction) of the jig cart 4) of the vehicle body 40, respectively. Furthermore, as shown in FIG. 6, the stopper bars 41 have a length greater than the width dimension (the dimension in the left-right direction in the traveling direction (transport direction) of the jig cart 4) of the vehicle body 40. In other words, the stopper bars 41 protrude beyond the vehicle body 40 when viewed from one side in the traveling direction (transport direction) of the jig cart 4.

[0029] As shown in Figures 4, 6 and 7, the jig 20 has a fixed plate 22, a plurality of elastic bodies (e.g., rubber) 24a, 24a, 24b, 24b, 24b integrated with the fixed plate 22, and a jig main body 26 connected to the fixed plate 22 via the elastic bodies (e.g., rubber) 24a, 24a, 24b, 24b, 24b.

[0030] As shown in FIGS. 4, 6, and 7, the fixing plate 22 is configured as a flat plate that is approximately rectangular in plan view, and is fixed to the car body 40 by fastening members (not shown) such as bolts. The fixing plate 22 also has a stopper block 23. The stopper block 23 is fixed to the fixing plate 22 by fastening members (not shown) such as bolts. As shown in FIGS. 6 and 7, the stopper block 23 is disposed on the left side in the running direction (transport direction, left direction in FIG. 7) of the jig cart 4, and approximately in the center of the running direction (transport direction, left direction in FIG. 7) of the jig cart 4. The stopper block 23 has a stopper pin 23a. The stopper pin 23a protrudes to the right side in the running direction (transport direction, left direction in FIG. 7) of the jig cart 4. The fixing plate 22 is an example of a feature that corresponds to a "base" in the present invention. The stopper block 23 is an example of a feature that corresponds to an "abutment portion" in the present invention.

[0031] As shown in FIG. 6, the elastic bodies 24a, 24a, 24a are disposed at positions closer to the wheel 42L, and the elastic bodies 24b, 24b, 24b are disposed at positions closer to the wheel 42R.

[0032] 4, 6, and 7, the jig body 26 includes a base plate 28, a support arm 30, and a block body 32. The jig body 26 is an example of a feature that corresponds to a “cast body support portion” of this invention.

[0033] 4 and 6, the base plate 28 is configured as a flat plate that is generally rectangular in plan view. The base plate 28 is slightly smaller than the fixed plate 22 and is arranged on the fixed plate 22 so as to be generally concentric in plan view. The base plate 28 is connected to the fixed plate 22 via elastic bodies (e.g., rubber) 24a, 24a, 24a, 24b, 24b, 24b, and is able to swing relative to the fixed plate 22 within the elastic range of the elastic bodies 24a, 24a, 24a, 24b, 24b, 24b.

[0034] The support arm 30 has a front support arm 30a and a rear support arm 30b, and is fixed to the base plate 28 with fastening members (not shown) such as bolts. As shown in FIGS. 6 and 7, the front support arm 30a and the rear support arm 30b are arranged on the right side in the running direction (transport direction, left direction in FIG. 7) of the jig cart 4. The front support arm 30a is arranged on the front side in the running direction (transport direction, left direction in FIG. 7) of the jig cart 4, and the rear support arm 30b is arranged on the rear side in the running direction (transport direction, left direction in FIG. 7) of the jig cart 4. As shown in FIGS. 4 and 6, the rear support arm 30b has a protruding piece 30c that can be engaged with a hook portion 62a (described later) of the work robot 6. The protruding piece 30c is arranged at the upper end of the rear support arm 30b (the upper end in FIGS. 4 and 6). The protruding piece 30c is an example of an embodiment corresponding to a "second predetermined location" in the present invention.

[0035] As shown in Fig. 6, the block body 32 is configured so that a casting 90 can be placed on its upper end surface, and is fixed to the base plate 28 with fastening members (not shown) such as bolts. As shown in Figs. 6 and 7, the block body 32 is disposed on the left side in the running direction (transport direction, leftward in Fig. 7) of the jig cart 4, and approximately in the center of the running direction (transport direction, leftward in Fig. 7) of the jig cart 4. This positions the block body 32 opposite the stopper block 23, more specifically, the stopper pin 23a. The block body 32 is an example of a configuration that corresponds to the "first predetermined location" of the present invention.

[0036] The jig cart 4 configured in this manner transports the cast molding 90 from outside the work area WA to the work area WA, and from the work area WA to outside the work area WA, while supporting the cast molding 90 with the support arm 30 and the block body 32, as shown in Figure 8.

[0037] 9 and 10, the working robot 6 has a robot arm 60, and a hammer 64 and a drill 66 fixed to the robot arm 60 via a bracket 62. As shown in Fig. 11, the bracket 62 has a hook portion 62a that is generally L-shaped in side view. The working robot 6 corresponds to the "posture changing portion" of the present invention, and the hook portion 62a is an example of an embodiment that corresponds to the "engagement portion" of the present invention.

[0038] As shown in Fig. 12, each lifter 8 has a hydraulic cylinder 80 arranged on the beams Bm, a pair of guides 82 also arranged on the beams Bm, and an abutment plate 84 connected to the hydraulic cylinder 80 and the pair of guides 82. The lifters 8 are arranged between a pair of stopper blocks SB1, SB2. The guides 82 are arranged to sandwich the hydraulic cylinder 80. The abutment plate 84 can abut against the stopper bars 41 from below (below in Fig. 12).

[0039] As shown in FIG. 2, the sand receiving pan SP is disposed directly below the jig cart 4 set in the work area WA. As shown in FIG. 13, the sand receiving pan SP has a fulcrum RS2 at one end (the left end in FIG. 13) in the extension direction (the left-right direction in FIG. 13), and is configured to be rotatable around the fulcrum RS2. The fulcrum RS2 is disposed at the upper ends of a pair of support columns St, St (see also FIG. 2) disposed in the work area WA. The fulcrum RS2 extends parallel to the extension direction of the rails R, R (the traveling direction (transport direction) of the jig cart 4). The support columns St, St are disposed in a position corresponding to the front end of the sand discharge cart 10 set in the work area WA.

[0040] 2 and 13, the sand discharge cart 10 is placed in the work area WA with its front end abutting against the supports St, St. In other words, the supports St, St can be said to function as stoppers for the sand discharge cart 10.

[0041] The control unit 12 is configured as a microprocessor centered around a CPU, and in addition to the CPU, is equipped with a ROM for storing processing programs, a RAM for temporarily storing data, an input / output port, and a communication port. The control unit 12 receives, via the input port, an arrival signal from a sensor 70 that detects the arrival of the jig cart 4 in the work area WA, a setting completion signal indicating that the casting molded body 90 has been set on the jig cart 4, and a removal completion signal indicating that the casting molded body 90 has been removed from the jig cart 4. The control unit 12 also outputs, via the output port, drive signals for the work robot 6 and the lifters 8, 8.

[0042] Next, the operation of the core removal device 1 configured as described above will be described, particularly the operation when removing a core from a cast body 90 by swinging the jig 20. First, an operator sets the cast body 90 on the jig cart 4 arranged in the setting area SA (FIGS. 1 and 2). When the CPU of the control unit 12 receives a setting completion signal indicating that the cast body 90 has been set on the jig cart 4, it outputs a drive signal to the work robot 6 to retract the jig cart 4 on which the cast body 90 has been set from the setting area SA into the work area WA. Here, the setting completion signal may be output by the operator pressing a setting completion button when the setting of the cast body 90 on the jig cart 4 is complete, or by the operator closing the door of the setting area SA when the setting of the cast body 90 on the jig cart 4 is complete. The work robot 6 transports (pulls in) the jig cart 4 by engaging the hook portion 62a of the bracket 62 fixed to the robot arm 60 with the hook block 40a of the jig cart 4, as shown in FIG.

[0043] When the jig cart 4 on which the casting molded body 90 is set is placed in the work area WA by the work robot 6, an arrival signal is output from the sensor 70s. Upon receiving the arrival signal, the CPU of the control unit 12 outputs a drive signal to the lifters 8, 8 to raise the jig cart 4. The lifters 8, 8 raise the jig cart 4 until the stopper bars 41, 41 of the jig cart 4 abut against the upper surfaces of the notches Nt1, Nt2 of the stopper blocks SB1, SB2, as shown in FIG. 15 . This fixes the jig cart 4 in a clamped state between the lifters 8, 8 (specifically, the abutment plate 84) and the stopper blocks SB1, SB2. As the jig cart 4 is raised in this manner, the wheels 42R, 42L are disengaged from the rails R, R.

[0044] Next, the CPU of the control unit 12 outputs a drive signal to the work robot 6 to crush the core of the cast compact 90 using the hammer 64 and the drill 66. As a result, the work robot 6 first uses the drill 66 to drill the hole-forming portions 90b, 90b, 90b, 90b (see FIGS. 12 and 15) of the cast compact 90, and then uses the hammer 64 to strike the riser portions 90a, 90a, 90a, 90a (see FIGS. 12 and 15) of the cast compact 90. This crushes the core, allowing most of the core to be separated from the inner wall of the cast compact 90.

[0045] When core crushing by hammer 64 and drill 66 is complete, the CPU of control unit 12 outputs a drive signal to work robot 6 to tilt jig body 26. As a result, as shown in FIG. 16, work robot 6 engages hook portion 62a with protruding piece 30c of jig body 26 and pulls jig body 26 in a direction in which block body 32 moves away from stopper block 23 (FIG. 15). At this time, a tensile force acts on elastic bodies 24a, 24a, 24a, and elastic bodies 24a, 24a, 24a are stretched (FIG. 15). Note that the pulling of jig body 26 by work robot 6 is performed within the elastic range of elastic bodies 24a, 24a, 24a, 24b, 24b, 24b.

[0046] After the jig body 26 has been pulled in this manner until the block body 32 is a predetermined distance away from the stopper block 23, the CPU of the control unit 12 outputs a drive signal to the work robot 6 to disengage the hook 62a from the protrusion 30c. This disengages the hook 62a from the protrusion 30c, and the restoring force of the elastic bodies 24a causes the block body 32 to swing toward the stopper block 23, i.e., the jig body 26 to return to its original position. At this time, the jig body 26 attempts to tilt beyond its original position due to inertia (in the opposite direction from the pulling direction by the work robot 6 relative to its original position), but this tilting is prevented by the collision of the block body 32 with the stopper block 23. Then, due to the reaction force of the collision of the block body 32 with the stopper block 23, the jig body 26 tilts again in the same direction as the pulling direction by the work robot 6. Thereafter, the swinging of the block body 32 accompanied by collision with the stopper block 23 is repeated until the vibration of the jig body 26 caused by the elastic bodies 24a converges. The swinging of the jig body 26 accompanied by this collision causes the cores peeled off from the inner wall of the cast compact 90 including the hole forming portions 90b, 90b, 90b, 90b, to collide with each other, or the peeled off cores and crushed cores to collide with the inner wall of the cast compact 90, thereby crushing the cores into smaller pieces and shaking off (removing) the cores from the cast compact 90.

[0047] Then, when the core removal operation from the casting molded body 90 by swinging the jig body 26 is completed, the CPU of the control unit 12 outputs a drive signal to the lifters 8, 8 to lower the jig cart 4. This engages the wheels 42R, 42L with the rails R, R. Next, the CPU of the control unit 12 outputs a drive signal to the work robot 6 to push the jig cart 4 from the work area WA to the removal area TA. The work robot 6 transports (pushes) the jig cart 4 by pressing the push-out block 40b of the jig cart 4 with the hook portion 62a of the bracket 62 fixed to the robot arm 60, as shown in FIG. 17 .

[0048] When the jig cart 4 is placed in the take-out area TA by the work robot 6, the CPU of the control unit 12 outputs a drive signal to the work robot 6 to dump the core sand collected in the sand receiving pan SP into the sand discharge cart 10. As a result, the work robot 6 first rotates the rails R, R arranged in the work area WA clockwise around fulcrum RS1 as shown in FIG. 5 (two-dot chain line in FIG. 5), and then rotates the sand receiving pan SP counterclockwise around fulcrum RS2 as shown in FIG. 13 (two-dot chain line in FIG. 13). In this way, the core sand in the sand receiving pan SP is dumped into the sand discharge cart 10. Once the dumping of the core sand into the sand discharge cart 10 is complete, the CPU of the control unit 12 outputs a drive signal to the work robot 6 to perform the reverse operation of the operation used to dump the core sand collected in the sand receiving pan SP into the sand discharge cart 10. As a result, the work robot 6 rotates the sand receiving pan SP clockwise around fulcrum RS2 so that the sand receiving pan SP returns to its original position (solid line in FIG. 13), and then rotates the rails R, R arranged in the work area WA counterclockwise around fulcrum RS1 (solid line in FIG. 5). The cast compact 90 set on the jig cart 4 arranged in the removal area TA is removed by a worker and placed on a pallet (not shown).

[0049] According to the core removal device 1 of the embodiment of the present invention described above, the jig body 26 supporting the cast body 90 is swingably fixed to the vehicle body 40 via the elastic bodies (e.g., rubber) 24a, 24a, 24a, 24b, 24b, 24b. The work robot 6 pulls the protruding piece 30c of the jig body 26 in a direction that moves the block body 32 away from the stopper block 23. When the block body 32 moves a predetermined distance away from the stopper block 23, the engagement between the hook portion 62a of the work robot 6 and the protruding piece 30c is released. This configuration allows the jig body 26 supporting the cast body 90 to swing with a simple configuration. Furthermore, since the swinging of the jig body 26 is accompanied by the collision of the block body 32 with the stopper block 23, the impact force of the collision of the block body 32 with the stopper block 23 can be used to promote the crushing of the core and the separation of the core from the cast body 90.

[0050] Furthermore, with the core removal device 1 according to the embodiment of the present invention, the protruding piece 30c is located at the position farthest from the elastic bodies (e.g., rubber) 24a, 24a, 24a, 24b, 24b, 24b (at the upper end of the rear support arm 30b), so that the jig body 26 can be tilted with a relatively small tensile force. On the other hand, when the work robot 6 (hook portion 62a) is released from the engagement with the protruding piece 30c, the block body 32 can be caused to collide with the stopper block 23 with a collision force greater than the tensile force required to tilt the jig body 26. This more effectively promotes the crushing of the core and the separation of the core from the cast compact 90.

[0051] Furthermore, according to the core removal device 1 of the embodiment of the present invention, the jig body 26 is oscillated by striking the casting molding 90 with a hammer 64, crushing the core with a drill 66, or using a work robot 6 to transport the jig cart 4, so there is no need to provide a dedicated part just for oscillating the jig body 26.

[0052] In the present embodiment, the jig body 26 is tilted by pulling the protruding piece 30c of the jig body 26, but the present invention is not limited to this. For example, the jig body 26 may be tilted by pushing the protruding piece 30c of the jig body 26.

[0053] In this embodiment, the jig body 26 is tilted using the work robot 6, but this is not limiting. For example, the jig body 26 may be tilted using a hydraulic cylinder, an air cylinder, or the like. In this case, a hook that can engage with the protruding piece 30c of the jig body 26 can be provided at the tip of the rod of the hydraulic cylinder, air cylinder, or the like.

[0054] In this embodiment, the jig body 26 is configured to tilt, but this is not limiting. For example, the jig body 26 may be configured to be pulled or pressed horizontally, or to be pulled or pressed vertically. In this case, the block body 32 and the stopper block 23 may be arranged in the direction opposite to the direction in which the jig body 26 is pulled or pressed.

[0055] In this embodiment, the protruding piece 30c is disposed at the position furthest from the elastic bodies (e.g., rubber) 24a (at the upper end of the rear support arm 30b), but this is not limiting. For example, the protruding piece 30c may be disposed at the middle of the rear support arm 30b in the extension direction (the up-down direction in FIG. 4), or at the lower end of the rear support arm 30b.

[0056] In this embodiment, the jig body 26 is swung by using the hammer 64 to strike the cast body 90, the drill 66 to crush the core, or the work robot 6 to transport the jig cart 4, but this is not limiting. For example, a dedicated work robot may be provided to swung the jig body 26.

[0057] In the present embodiment, the base plate 28 and the fixed plate 22 are connected via elastic bodies (e.g., rubber) 24a, 24a, 24a, 24b, 24b, and the fixed plate 22 is fixed to the vehicle body 40, thereby allowing the jig body 26 to swing relative to the vehicle body 40, but this is not limiting. For example, the base plate 28 and the vehicle body 40 may be directly connected via elastic bodies (e.g., rubber) 24a, 24a, 24a, 24b, 24b, 24b. In this case, the vehicle body 40 is an example of an embodiment corresponding to the "base" of the present invention.

[0058] In this embodiment, a setting area SA and an unloading area TA are provided, and the cast body 90 is transported from the setting area SA to the unloading area TA via the work area WA. However, this is not limiting. For example, instead of the setting area SA and the unloading area TA of this embodiment, multiple setting and unloading areas may be provided, and the cast body 90 may be transported back and forth between the setting and unloading areas and the work area WA. That is, in the setting and unloading area, the cast body 90 is set on the jig cart 4, and the jig cart 4 with the cast body 90 set thereon is transported from the setting and unloading area to the work area WA. When the work in the work area WA (core removal work) is completed, the jig cart 4 with the cast body 90 set thereon is transported back to the setting and unloading area, and the cast body 90 is removed from the jig cart 4 in the setting and unloading area. In this case, while work (core removal work) is being performed in the work area WA, another cast molded body 90 may be set on another jig cart 4 in another set removal area, and the jig cart 4 that has completed work (core removal work) in the work area WA may be transported back to the original set removal area, and at the same time, another jig cart 4 with the cast molded body 90 set on it may be transported to the work area WA. With this configuration, the cast molded body 90 can be transported efficiently to the work area WA, thereby shortening the work time.

[0059] The present embodiment shows an example of a mode for carrying out the present invention, and therefore the present invention is not limited to the configuration of the present embodiment. [Explanation of symbols]

[0060] 1 Core removal device (core removal device) 2 frame 4 Jig cart 6. Working robot (posture change unit) 8 Lifter 10 Sand removal cart 12 Control Unit 20 Jig 22 Fixing plate (base) 23 Stopper block (contact part) 23a Stopper pin 24a Elastic body (elastic body) 24b Elastic body (elastic body) 26 Jig body (casting body support part) 28 Base Plate 30 Support Arm 30a Front support arm 30b Rear support arm 30c protruding piece (second specified location) 32 Block body (first designated location) 40 Body 40a Hooking block 40b Extrusion block 40c Front sand collection plate 40d Rear sand collection plate 41 Stopper bar 42R wheels 42L wheels 60 Robot Arm 62 Bracket 62a Hook portion (engagement portion) 64 Hammer 66 Drill 70 sensors 80 Hydraulic Cylinder 82 Guide 84 Contact plate 90 Casting molding (casting molding) 90a Riser section 90b Hole component WA Work Area SA Set Area TA removal area R rail SP Sand Pan F Floor RS1 fulcrum RS2 fulcrum Bm beam SB1 Stopper Block SB2 stopper block Nt1 notch Nt2 notch St pillar

Claims

1. A core removal device for removing a core from a casting body having a core, The base and an elastic body fixed to the base; a casting body support portion capable of supporting the casting body and supported on the base via the elastic body; a contact portion fixed to the base so as to be able to contact a first predetermined position of the casting body support portion; a position changer having an engaging portion that can be engaged with a second predetermined portion of the cast body support portion, and that can change the position of the cast body support portion in a direction in which the first predetermined portion moves away from the abutment portion via the engaging portion within the elastic region of the elastic body, and that can release the engagement of the engaging portion with the second predetermined portion after the position of the cast body support portion has been changed; A core removal device comprising:

2. The position changing portion is capable of changing the position of the casting body support portion by pulling the second predetermined portion via the engaging portion. The core removal device of claim 1.

3. The second predetermined location is disposed on the opposite side of the elastic body from the base. The core removal device according to claim 1 or 2.

4. The position changing unit is capable of performing a predetermined process on the casting. The core removal device of claim 2.

5. the second predetermined location is disposed on the opposite side of the elastic body from the base, The position changing unit is capable of performing a predetermined process on the casting. The core removal device of claim 2.

Images