Reversing device

Abstract

To provide a technique capable of easily performing work for fixing an object to a reversing device.SOLUTION: An inversion device includes a pair of holding mechanisms configured to hold an object to be held, and the pair of holding mechanisms includes an insertion portion that is inserted into a receiving portion provided in the object to be held from above the object to be held and is fixed to the object to be held. The pair of holding mechanisms are arranged at a distance from each other in a predetermined direction and configured to be rotatable about the same rotation axis extending in the predetermined direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to an inversion device for inverting a held object such as a mold. [Background technology]

[0002] Molds used in press machines and the like are used as a mold set consisting of a combination of an upper mold and a lower mold. When repairing such a mold, particularly the upper mold, a method is used in which the upper mold is lifted up and separated from the lower mold, and then inverted in that state.

[0003] Conventionally, techniques for inverting a mold have been proposed. In Patent Document 1, a mold holding means for holding an upper mold by a magnet is provided between a pair of rotors having horizontal rotation axes, and after the upper mold is held by the mold holding means, the lower mold is retracted, and then the rotors are rotated to invert the upper mold. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2018-20366 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the configuration of Patent Document 1 is limited to objects to be held that are made of a material that can be held by a magnet. Patent Document 1 also describes the use of multiple clamping devices that are electrically or fluid-pressure driven. When using such clamping devices, there are no restrictions on the mold material, but when holding a mold with the clamping devices, it is necessary to align the clamps with the appropriate positions of the mold while it is suspended by a crane or the like, which can be difficult to do.

[0006] An object of the present disclosure is to propose a technology that allows the task of fixing an object to an inversion device to be easily performed. [Means for solving the problem]

[0007] One aspect of the present disclosure is an inversion device including a pair of holding mechanisms configured to hold a holding object. The pair of holding mechanisms include insertion portions that are inserted into insertion receiving portions provided on the holding object from above and fixed to the holding object. The pair of holding mechanisms are arranged at a distance from each other in a predetermined direction and are configured to be rotatable around a common rotation axis extending in the predetermined direction.

[0008] In this configuration, the object to be held can be held by the holding mechanism by inserting the inserting part into the receiving part from above. Therefore, the task of fixing the object to be held to the holding mechanism can be performed more easily than, for example, when the object to be held is clamped in a hanging state by a clamp.

[0009] In the above-described inversion device, the insertion part may be a member having a male thread formed thereon, and may be configured to be fixed to the object to be held by fitting it into a female thread formed in the inserted part of the object to be held or arranged below the inserted part. In such a configuration, the object to be held can be held by the holding mechanism by utilizing the fitting of the male thread of the insertion part and the female thread of the inserted part.

[0010] In the inversion device described above, at least one of the pair of holding mechanisms may include a mounting portion having a mounting surface on which a portion of the holding object can be placed. Furthermore, at least one of the pair of holding mechanisms may be configured to be able to hold the holding object placed on the mounting portion. With this configuration, the insertion portion can be inserted into the insertion portion with the holding object placed on the mounting portion, making it easier to hold the holding object in the holding mechanism.

[0011] In the above-mentioned inversion device, at least one of the pair of holding mechanisms may be provided with a movement suppression section that suppresses movement of the held object held by the pair of holding mechanisms in the intersecting direction by abutting the held object from the predetermined direction and an intersecting direction that intersects with the insertion direction of the insertion section.

[0012] In this configuration, when the object to be held attempts to move in the intersecting direction, the movement suppression portion abuts against the object to be held, thereby preventing the object to be held from moving in the intersecting direction and stabilizing the state in which the holding mechanism holds the object to be held.

[0013] The movement suppressing portion may include an extension portion extending in the transverse direction, and a contact portion fixed to one of a plurality of positions on the extension portion spaced apart in the transverse direction and contacting the object to be held. In this configuration, the position of the contact portion can be changed according to the shape of the object to be held.

[0014] The inversion device may further include a gap maintaining unit that maintains a predetermined gap between the pair of holding mechanisms. In this configuration, the gap maintaining unit can maintain the gap between the pair of holding mechanisms, thereby stabilizing the state in which the holding mechanisms hold the object to be held.

[0015] The above-mentioned inversion device may include a sensor provided in at least one of the pair of holding mechanisms that detects the state in which the holding mechanism is holding the object to be held, a drive unit that rotates at least one of the pair of holding mechanisms, and a control unit that is configured to enable the drive unit to perform the rotation on the condition that the sensor detects the state in which the object to be held is held by the holding mechanism.

[0016] In this configuration, when the sensor does not detect that the object is being held, the drive unit does not rotate and rotation of the holding mechanism is restricted, which prevents the holding mechanism from rotating when the object is not sufficiently fixed, thereby reducing the risk of the object falling off. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1A is a plan view showing the reversing device of the embodiment, FIG. 1B is a front view, and FIG. 1C is a right side view. [Figure 2] FIG. 2 is a schematic front view of the reversing device showing a state in which the mold (upper mold 3) is held. [Figure 3] FIG. 4 is a perspective view showing a first holding mechanism. [Figure 4] 4A and 4B are schematic front views showing the periphery of a first holding mechanism, in which FIG. 4A shows a state before an upper mold is attached, and FIG. 4B shows a state after the upper mold is attached. [Figure 5] 5A is a front view showing the initial position, FIG. 5B is a front view showing the rotating state, and FIG. 5C is a front view showing the rotated position. [Figure 6] FIG. 10 is a perspective view showing a modified example of the reversing device. [Figure 7] FIG. 10 is a schematic front view showing a modified example of the reversing device. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. [1. Embodiment] The reversing device 1 of this embodiment is a device that reverses, in particular, the upper die 3 of a die, which is an example of an object to be held.

[0019] 1A to 1C and 2, the reversing device 1 includes a first holding mechanism 11, a second holding mechanism 12, a first rotating device 13, a second rotating device 14, a moving device 15, and a control device 16. In the following description, the up-down direction refers to the up-down direction perpendicular to the horizontal direction.

[0020] As shown in Figures 3, 4A, and 4B, the first holding mechanism 11 includes a base 31, a first fixing block 32, a second fixing block 33, a fourth fixing block 34, a fixing bolt 35, a sensor pressing plate 36, an attached sensor 37, etc.

[0021] The base 31 is attached to a first shaft 42 that extends in a predetermined direction, and rotates around the first shaft 42. The base 31 has a length in the intersecting direction in the initial position shown in FIG. 3. The initial position here refers to a position where the first holding mechanism 11 can rotate and where the upper mold 3 is attached or detached. The predetermined direction refers to the length direction of the rotation axis A of the first holding mechanism 11 (i.e., the length direction of the first shaft 42). The intersecting direction is a direction perpendicular to the predetermined direction, and is a direction along a horizontal plane when in the initial position, but this direction changes as the first holding mechanism 11 rotates.

[0022] In addition, the base 31 can be rotated about the first shaft 42 (rotation axis A) between the initial position shown in Fig. 5A and a rotation position rotated approximately 180° as shown in Fig. 5C. In the following explanation, unless otherwise specified, the arrangement and shape of the first holding mechanism 11 when it is in the initial position shown in Fig. 3 will be described.

[0023] The first fixed block 32 is attached to the upper side of the base 31 at a central position in the intersecting direction of the base 31. The second fixed block 33 and the fourth fixed block 34 are arranged on one side and the other side in the intersecting direction above the base 31 in its initial position.

[0024] The fourth fixing block 34 is provided with an abutting portion 34a that abuts against the upper mold 3. A through hole is formed in the abutting portion 34a, and the other end of the base 31 passes through it. The base 31 is formed with screw holes for fixing the abutting portion 34a at multiple positions in the intersecting direction, so that the abutting portion 34a can be fixed at any of the multiple positions. This abutting portion 34a abuts against the upper mold 3 held by the first holding mechanism 11 from the intersecting direction, thereby preventing the upper mold 3 from moving in the intersecting direction. The base 31 is an example of an extension portion, and the base 31 and the abutting portion 34a are an example of a movement suppressing portion.

[0025] The fixing bolt 35 is a bolt for fixing the upper mold 3 to the first holding mechanism 11, and has a shaft portion 35a inserted into a through hole 32a formed in the first fixing block 32. The shaft portion 35a is a member having a male thread formed thereon.

[0026] The sensor pressing plate 36 is a plate-shaped member that is disposed between the head 35b of the fixing bolt 35 and the first fixing block 32. When pressed by the sensor pressing plate 36, the mounting sensor 37 outputs a predetermined signal.

[0027] 4A and 4B, the operation of fixing the upper mold 3 to the first holding mechanism 11 will be described. First, as shown in FIG. 4A, the upper mold 3 is moved so that its end is positioned below the first fixed block 32. Although not shown, the upper mold 3 is also moved so that its end is positioned below the second fixed block 33 and the fourth fixed block 34. The movement of the upper mold 3 here is performed while it is hoisted by a crane, for example.

[0028] At this time, a spring 38 disposed between the sensor retainer plate 36 and the first fixing block 32 prevents the sensor retainer plate 36 from coming into contact with the mounting sensor 37. Next, as shown in FIG. 4B , a fixing bolt 35 is inserted into a through hole 3a formed in the upper mold 3. A female thread is formed in the through hole 3a, which allows the fixing bolt 35 to fit into the through hole 3a. As the fixing bolt 35 is tightened, the sensor retainer plate 36 is pressed by the head 35b of the fixing bolt 35, compressing the spring 38 and moving closer to the first fixing block 32. When the fixing bolt 35 is tightened to a specific depth, the sensor retainer plate 36 presses the switch of the mounting sensor 37.

[0029] In this way, by fastening the fixing bolt 35 to the through hole 3a, the upper mold 3 can be fixed to the first holding mechanism 11, and this state can be detected by the attachment sensor 37. In other words, the attachment sensor 37 detects the state in which the first holding mechanism 11 holds the upper mold 3. The fixing bolt 35 is an example of an insertion part that is inserted from above the object to be held into an insertion part provided on the object to be held and fixed to the object. The through hole 3a is an example of an insertion part having a female thread formed therein. The above-mentioned intersecting direction is a direction perpendicular to the insertion direction of the fixing bolt 35, which is the insertion part (the axial direction of the through hole 3a).

[0030] Although not shown, the second holding mechanism 12, like the first holding mechanism 11, includes a base 31, a first fixed block 32, a second fixed block 33, a fourth fixed block 34, a fixing bolt 35, a sensor pressing plate 36, and an attachment sensor 37. Furthermore, each component of the second holding mechanism 12 is configured and arranged so as to be plane-symmetrical to the first holding mechanism 11 with respect to a plane perpendicular to the rotation axis A (a plane perpendicular to a predetermined direction). The method of attaching the upper mold 3 to the second holding mechanism 12 is also the same as that of the first holding mechanism 11.

[0031] As shown in FIGS. 1A to 1C and 2, the first rotating device 13 includes a housing 41, a first shaft 42, a second shaft 43, a motor 44, a belt 45, and the like. The first shaft 42 is disposed in the housing 41, and the first holding mechanism 11 is attached to an end thereof, and rotation of the first shaft 42 causes rotation of the first holding mechanism 11. The second shaft 43 is disposed in a position below the first shaft 42 in the housing 41, and rotates in response to the drive of the motor 44. The belt 45 transmits the rotation of the second shaft 43 to the first shaft 42.

[0032] The second rotation device 14 includes a housing 51, a shaft 52 arranged in the housing 51, four outer rollers 53, and four inner rollers 54. The shaft 52 has the second holding mechanism 12 attached to its end. The shaft 52 is not provided with a driving force, and rotates along with the upper mold 3 which is rotated by the first rotation device 13. In other words, the pair of first and second holding mechanisms 11 and 12 are arranged at an interval in a predetermined direction and are configured to be rotatable around the same rotation axis A extending in the predetermined direction. The outer rollers 53 move on outer rails 61, which will be described later, and the inner rollers 54 move on inner rails 62, which will be described later.

[0033] The moving device 15 is a mechanism for moving the second holding mechanism 12, and includes a pair of outer rails 61 and a pair of inner rails 62. The outer rails 61 are mainly used to support the housing 51, and the inner rails are mainly used to prevent the housing 51 from shifting in position.

[0034] A gap maintaining part 63 that maintains a predetermined gap between the pair of holding mechanisms is provided between the first rotation device 13 and the second rotation device 14. The gap maintaining part 63 is a columnar member that connects the first rotation device 13 and the second rotation device 14. There are no particular limitations on the specific method for attaching the gap maintaining part 63 to the first rotation device 13 and the second rotation device 14, but it can be fixed using bolts and nuts, for example.

[0035] The control device 16 includes a microcomputer with a CPU (not shown) and an operation switch for user operation. The control device 16 is located in a box 16a disposed near the housing 41 and is electrically connected to the above-mentioned mounting sensor 37, motor 44, and a rotation sensor (not shown). When the mounting sensor 37 outputs a signal indicating that it is pressed by the sensor retainer plate 36, rotation of the motor 44 is permitted and rotation is performed in response to operation of the operation switch. In other words, the motor 44 is configured to be capable of rotation only when the mounting sensor 37 detects that the upper mold 3 is being held. The motor 44 is an example of a drive unit. Alternatively, the control device 16 may be configured to acquire an output signal from a rotation sensor that detects the rotation amount or rotation position of the first shaft 42 and to allow rotation only within a predetermined rotation angle. The control device 16 is an example of a control unit.

[0036] <Operation of the inverting device> In the initial position, as shown in FIG. 5A, the upper mold 3 is held so that its main surface is horizontal. FIG. 5B shows the state in which the upper mold 3 has been rotated 90° so that the fourth fixed block 34 is lowered. When the fourth fixed block 34 moves downward, even if the upper mold 3 attempts to move downward, the movement is suppressed by abutting against the abutment portion 34a. FIG. 5C shows the state in which the upper mold 3 has been rotated 180° from FIG. 5A. It is also possible to stop the rotation at a position between FIG. 5A and FIG. 5C, as in the state shown in FIG. 5B, in which case repairs and other work can be performed at that angle.

[0037] [2.Effects] According to the embodiment described above in detail, the following effects can be obtained. (1a) The reversing device 1 of this embodiment includes a pair of first and second holding mechanisms 11 and 12 configured to be able to hold an upper mold 3, which are arranged at an interval in a predetermined direction and are configured to be rotatable around the same rotation axis A extending in the predetermined direction. The first and second holding mechanisms 11 and 12 include fixing bolts 35 that are inserted into through holes 3a provided in the upper mold 3 from above the upper mold 3 and fixed to the upper mold 3.

[0038] In this configuration, by inserting the fixing bolt 35 into the through hole 3a of the upper mold 3, the upper mold 3 can be held by the first holding mechanism 11 and the second holding mechanism 12. Therefore, the operation of holding the upper mold 3 can be easily performed.

[0039] (1b) In the reversing device 1 of this embodiment, the fixing bolt 35 is a member having a male thread formed thereon, and is configured to be fixed to the upper mold 3 by fitting it into a female thread formed in the through hole 3a. Therefore, the upper mold 3 can be held by the first holding mechanism 11 and the second holding mechanism 12 by utilizing the fastening of the male thread and the female thread.

[0040] (1c) The reversing device 1 of this embodiment includes a base 31 and a contact portion 34a as a movement suppressing portion that abuts against the upper mold 3 from the intersecting direction to suppress movement of the upper mold 3 in the intersecting direction. Such a movement suppressing portion can suppress movement of the upper mold 3 in the intersecting direction, thereby stabilizing the state in which the first holding mechanism 11 and the second holding mechanism 12 hold the upper mold 3. Furthermore, the contact portion 34a can be fixed to any one of a plurality of positions on the base 31 that are spaced apart in the intersecting direction. Therefore, the position of the contact portion 34a can be changed depending on the shape of the upper mold 3.

[0041] (1d) The reversing device 1 of this embodiment is provided with a distance maintaining unit 63 that maintains a predetermined distance between the first holding mechanism 11 and the second holding mechanism 12. This distance maintaining unit 63 can maintain the distance between the pair of first holding mechanism 11 and second holding mechanism 12, thereby stabilizing the state in which these holding mechanisms hold the upper mold 3.

[0042] (1e) The reversing device 1 of this embodiment includes an attachment sensor 37 that is provided in the first holding mechanism 11 and detects a state in which the first holding mechanism 11 holds the upper mold 3. The control device 16 is configured to be able to execute rotation by the motor 44 on the condition that the attachment sensor 37 detects a state in which the upper mold 3 is held by the first holding mechanism 11.

[0043] In this configuration, when the attachment sensor 37 does not detect that the upper mold 3 is held, the motor 44 does not rotate, and the rotation of the first holding mechanism 11 is restricted. This prevents the first holding mechanism 11 from rotating when the upper mold 3 is not sufficiently fixed to the first holding mechanism 11, thereby reducing the risk of the upper mold 3 falling off.

[0044] [2. Other embodiments] Although the embodiments of the present disclosure have been described above, it goes without saying that the present disclosure is not limited to the above embodiments and can take various forms as long as they fall within the technical scope of the present disclosure.

[0045] (2a) In the above embodiment, the fixing bolt 35 is attached to the upper mold 3 while it is suspended by a crane. However, the fixing bolt 35 may be attached to the upper mold 3 while it is placed in a specific position.

[0046] 6 and 7 includes a mounting portion 112 having a mounting surface on which a part of the upper mold 3 can be placed. The first holding mechanism 111 is configured to be able to hold the upper mold 3 placed on the mounting portion 112. Note that a similar mounting portion may also be provided in a second holding mechanism (not shown), or a similar mounting portion may be provided only in the second holding mechanism.

[0047] In this configuration, the fixing bolt 35 can be inserted into the through hole 3a while the upper mold 3 is placed on the mounting portion 112, making it easier to hold the upper mold 3 in the holding mechanism.

[0048] (2b) In the above embodiment, a configuration in which the mold, particularly the upper mold 3, is held by the holding mechanism as the held object is exemplified. However, the held object is not particularly limited, and the inversion device 1 of the present disclosure can hold various held objects.

[0049] (2c) In the above embodiment, the fixing bolt 35 is used as an example of an inserting portion fixed to a holding object, and the through hole 3a is used as an example of an insertable portion provided in the holding object. However, the specific configurations are not particularly limited, and various configurations can be adopted in which fixing is achieved by inserting the inserting portion into the insertable portion from above the holding object. For example, the female thread may be a nut independent of the mold or a nut fixed to the mold, positioned below the through hole (insertable portion) provided in the mold. Furthermore, the inserting portion may be configured to engage with the edge or inner circumferential surface of the through hole in the mold after being inserted into the insertable portion, such as a rivet. Furthermore, for example, the inserting portion may have a protrusion protruding laterally, and the protrusion may engage with the edge or inner circumferential surface of the through hole by rotating the inserting portion after insertion.

[0050] (2d) In the above embodiment, the abutting portion 34a is configured such that its position can be changed by fixing it to one of a plurality of screw holes provided in the base 31. However, the configuration for changing the position is not particularly limited, and for example, the abutting portion 34a may be configured so that it can be fixed at any position on the base 31.

[0051] (2e) In the above embodiment, the motor 44, which is the drive unit, is provided in the first holding mechanism 11, but the drive unit may be provided in both the first holding mechanism 11 and the second holding mechanism 12. Also, the contact portion 34a and the attachment sensor 37 are provided in both holding mechanisms, but they may be provided in only one of the holding mechanisms, or in neither of them.

[0052] (2f) The reversing device 1 of the above embodiment may be modified in various ways. For example, the moving device 15 may be provided on the first rotating device 13. Also, instead of the attachment sensor 37, another sensor that detects that the upper mold 3 is fixed to the holding mechanism may be used.

[0053] (2g) Multiple functions of one component in the above embodiments may be realized by multiple components, or one function of one component may be realized by multiple components. Also, multiple functions of multiple components may be realized by one component, or one function realized by multiple components may be realized by one component. Also, part of the configuration of the above embodiments may be omitted. Also, at least part of the configuration of the above embodiments may be added to or substituted for the configuration of another of the above embodiments. [Explanation of symbols]

[0054] 1...inversion device, 3...upper die (mold), 3a...through hole, 11...first holding mechanism, 12...second holding mechanism, 13...first rotation device, 14...second rotation device, 15...movement device, 16...control device, 31...base, 32...first fixed block, 32a...through hole, 33...second fixed block, 34...fourth fixed block, 34a...contact portion, 35...fixing bolt, 35a...shaft portion, 35b...head portion, 36...sensor pressing plate, 37...mounted sensor, 38...spring, 41...casing, 42...first shaft body, 43...second shaft body, 44...motor, 45...belt, 51...casing, 52...shaft body, 53...outer roller, 54...inner roller, 61...outer rail, 62...inner rail, 63...gap maintaining portion, 111...first holding mechanism, 112...placing portion

Claims

1. A pair of holding mechanisms configured to be able to hold an object to be held is provided, the pair of holding mechanisms each include an insertion portion that is inserted into an insertion receiving portion provided on the object to be held from above the object to be held and fixed to the object to be held; The pair of holding mechanisms are arranged at an interval in a predetermined direction and are configured to be rotatable around the same rotation axis extending in the predetermined direction.

2. 2. The inversion device according to claim 1, An inversion device in which the insertion portion is a member having a male thread formed thereon, and is fixed to the object to be held by fitting it into a female thread formed in the inserted portion of the object to be held or positioned below the inserted portion.

3. 2. The inversion device according to claim 1, At least one of the pair of holding mechanisms is a placing section having a placing surface on which a part of the object to be held can be placed, At least one of the pair of holding mechanisms is configured to be able to hold the object to be held placed on the placement section.

4. 2. The inversion device according to claim 1, An inversion device, wherein at least one of the pair of holding mechanisms is equipped with a movement suppression section that suppresses movement of the held object held by the pair of holding mechanisms in the intersecting direction that intersects the predetermined direction and the insertion direction of the insertion section by abutting the held object in the intersecting direction.

5. 5. The inversion device according to claim 4, An inversion device wherein the movement suppression portion comprises an extension portion extending in the intersecting direction, and an abutment portion fixed to one of a plurality of positions on the extension portion spaced apart in the intersecting direction and abutting the object to be held.

6. 2. The inversion device according to claim 1, An inversion device including a gap maintaining portion that maintains the gap between the pair of holding mechanisms at a predetermined gap.

7. 2. The inversion device according to claim 1, moreover, a sensor provided in at least one of the pair of holding mechanisms, for detecting a state in which the holding mechanism holds the object to be held; a drive unit that rotates at least one of the pair of holding mechanisms; and a control unit configured to enable the rotation by the drive unit on the condition that the sensor detects that the object to be held is held by the holding mechanism.

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