JP7301563B2 - Water heater and die casting machine - Google Patents

Description

The present invention relates to a water heater and a die-cast machine, and more particularly to a water heater and a die-cast machine having a ladle for pumping molten metal from a melting furnace.

2. Description of the Related Art Conventionally, there is known a water heater provided with a ladle for pumping up molten metal from a melting furnace (see Patent Document 1, for example).

The aforementioned Patent Document 1 discloses a molten metal supply device (hot water supply device) used in a die casting machine. This molten metal supply device includes a ladle for drawing up molten metal from a melting furnace, which is a furnace for molten metal, and a ladle conveying link mechanism for moving the ladle. This molten metal supply device moves the ladle by means of a link mechanism for ladle transfer, thereby pumping up the molten metal from the melting furnace with the ladle, and feeding the molten metal pumped up from the melting furnace with the ladle into the injection sleeve of the die casting machine. configured to perform the act of supplying. In addition, in the operation of pumping up the molten metal from the melting furnace with the ladle, the operation of lowering the ladle conveying link mechanism is performed so as to lower the ladle toward the melting furnace.

JP-A-2008-93675

Here, in the molten metal supply apparatus described in Patent Document 1, the ladle that descends as the ladle conveying link mechanism descends lands on the molten metal in the melting furnace through the surface of the molten metal. At this time, if the speed of the downward movement of the ladle conveying link mechanism is high, the surface of the molten metal in the melting furnace may undulate due to the ladle landing on the surface of the molten metal. In this case, the surface of the molten metal in the melting furnace undulates, causing variation in the amount of the molten metal pumped up by the ladle. Therefore, there is a problem that the quality of the die-cast product manufactured from the molten metal is degraded due to the decrease in accuracy of the amount of hot water supplied.

The present invention has been made to solve the above-described problems, and one object of the present invention is to improve the quality of die-cast products manufactured from molten metal by improving the accuracy of the amount of molten metal supplied. It is to provide a water heater and a die-casting machine capable of achieving this.

To achieve the above object, a hot water supply apparatus according to a first aspect of the present invention includes a ladle for pumping up molten metal from a molten metal furnace, an arm mechanism for moving the ladle including a plurality of arms, and a drive motor for driving the arm mechanism. is provided separately from the drive motor, and decelerates the arm mechanism so as to decelerate the arm mechanism from a state in which the arm mechanism is not in contact with the arm mechanism when the arm mechanism is lowered by a driving force from the drive motor. and a deceleration mechanism that applies force from below .

In the hot water supply apparatus according to the first aspect of the present invention, as described above, the arm mechanism is provided separately from the drive motor so that the arm mechanism decelerates when the arm mechanism is lowered by the driving force from the drive motor. A deceleration mechanism is provided to apply a deceleration force. As a result, compared with the case where the arm mechanism is lowered only by the drive force from the drive motor, the arm mechanism is lowered at a lower speed by the amount of deceleration due to the deceleration force applied to the arm mechanism by the speed reduction mechanism. be able to. As a result, when the ladle that descends with the downward movement of the arm mechanism lands on the molten metal in the molten metal furnace through the molten metal surface, the molten metal in the molten metal furnace drops due to the contact of the ladle on the molten metal surface. It is possible to suppress waving of the hot water surface. As a result, it is possible to suppress variations in the amount of the molten metal pumped up by the ladle due to the surface of the molten metal in the melting furnace undulating. As a result, it is possible to improve the accuracy of the hot water supply amount. As a result, it is possible to provide a water heater capable of improving the quality of die-cast products manufactured from molten metal by improving the accuracy of the amount of hot water supplied.

In the hot water supply apparatus according to the first aspect, the speed reduction mechanism preferably has a support portion, and supports one of the arms of the arm mechanism by the support portion when the arm mechanism is lowered by a driving force from the drive motor. Supporting the target arm is configured to apply a deceleration force to the arm mechanism to decelerate the arm mechanism. With this configuration, a deceleration force can be applied to the arm mechanism simply by supporting the arm to be supported. As a result, the deceleration mechanism can easily and simply apply a deceleration force to the arm mechanism.

In this case, preferably, the speed reduction mechanism is configured to support the arm to be supported by the arm mechanism by the support portion when the arm mechanism is raised by the drive force from the drive motor. According to this configuration, the arm to be supported by the arm mechanism is supported by the speed reduction mechanism during the lifting operation of the arm mechanism, which is an operation for raising the ladle whose weight is increased by the amount of the held molten metal due to the holding of the molten metal. be able to. As a result, compared to the case where the arm mechanism is raised only by the driving force from the drive motor, the arm mechanism can be easily raised by the support provided by the speed reduction mechanism. Further, the deceleration mechanism that decelerates the arm mechanism during the downward movement of the arm mechanism can also be used as a support mechanism that supports the arm mechanism during the upward movement of the arm mechanism. As a result, unlike the case where the support mechanism is provided separately and independently from the speed reduction mechanism, it is possible to facilitate the upward movement of the arm mechanism while preventing the structure of the water heater from becoming complicated.

In the hot water supply apparatus in which the speed reduction mechanism has a support portion, the speed reduction mechanism preferably includes an actuator having a reciprocating portion that linearly reciprocates, and the reciprocating portion has a support portion at its tip. With this configuration, the reciprocating movement of the reciprocating portion of the actuator of the deceleration mechanism is used to support the arm to be supported by the support portion at the tip of the reciprocating portion while applying deceleration force to the arm mechanism. can be done. As a result, the speed reduction mechanism can easily and more simply apply the speed reduction force to the arm mechanism.

In this case, preferably the actuator is an air cylinder. With this configuration, an air cylinder having a simple structure can be used as the actuator.

In the hot water supply apparatus in which the reciprocating portion of the actuator has a support portion at the tip portion, preferably, the actuator has a support portion at the tip portion of the reciprocating portion that extends in a direction substantially perpendicular to the longitudinal direction of the arm to be supported by the arm mechanism. , so as to support the arm to be supported by the arm mechanism. With this configuration, when the arm to be supported by the arm mechanism is supported, the load applied from the arm to be supported to the supporting portion at the tip of the reciprocating portion can be applied along the axial direction of the reciprocating portion. can. As a result, it is possible to suppress the lateral load (the load in the direction crossing the axial direction of the reciprocating portion) from being applied to the reciprocating portion of the actuator. As a result, the load (lateral load) on the reciprocating portion of the actuator can be suppressed, and the arm to be supported by the arm mechanism can be supported by the reciprocating portion of the actuator.

In this case, preferably, in the state in which the reciprocating portion has moved most to the distal end side, the actuator is such that the support portion at the distal end portion of the reciprocating portion moves from a direction substantially perpendicular to the longitudinal direction of the arm to be supported by the arm mechanism. It is provided to support the arm to be supported by the arm mechanism. With this configuration, it is possible to suppress the lateral load from being applied to the reciprocating portion of the actuator in a state in which the reciprocating portion of the actuator is likely to receive a lateral load because the reciprocating portion has moved most toward the distal end side. . As a result, it is possible to effectively suppress a lateral load from being applied to the reciprocating portion of the actuator when the arm to be supported by the arm mechanism is supported.

In the hot water supply apparatus in which the supporting portion at the tip of the reciprocating portion supports the arm to be supported by the arm mechanism from a direction substantially perpendicular to the longitudinal direction of the arm to be supported by the arm mechanism, preferably the actuator comprises a ladle. is located at a position where it lands on the molten metal in the molten metal furnace through the molten metal surface, the support portion at the tip of the reciprocating portion is positioned in a direction substantially perpendicular to the longitudinal direction of the arm to be supported by the arm mechanism. It is provided to support the arm to be supported by the arm mechanism. With this configuration, it is possible to suppress the lateral load from being applied to the reciprocating portion of the actuator just before the ladle lands on the molten metal in the molten metal furnace via the molten metal surface. As a result, in a state in which the arm to be supported by the arm mechanism is well supported by the support portion at the tip of the reciprocating portion of the actuator, the ladle can land the molten metal in the melting furnace via the molten metal surface. can be done.

In the hot water supply apparatus in which the speed reduction mechanism has the support portion, the support portion preferably has a curved support surface. According to this configuration, when the arm to be supported by the arm mechanism is supported by the support portion of the speed reduction mechanism, the arm to be supported by the arm mechanism can be brought into contact with the curved support surface. As a result, it is possible to reduce the occurrence of wear between the support surface of the support portion of the speed reduction mechanism and the arm to be supported by the arm mechanism.

In the hot water supply apparatus in which the reduction mechanism has the support portion, preferably the arm to be supported has a supported portion that contacts the support portion, and the supported portion is detachable. With this configuration, when wear occurs in the supported portion of the arm to be supported by the arm mechanism due to the support by the support portion of the speed reduction mechanism, only the detachably supported portion is replaced. be able to. As a result, compared to the case where the arm itself to be supported by the arm mechanism is replaced, the replacement work of the worn portion can be performed easily, and the time required for this replacement work can be shortened.

In this case, preferably, the supported portion is a plate member. With this configuration, the supported portion can be configured with a simple configuration.

A die casting machine according to a second aspect of the present invention includes an injection device for injecting molten metal, and a water heater for supplying molten metal to the injection device. The arm mechanism for moving the ladle, the drive motor for driving the arm mechanism, and the drive motor are provided separately, and the arm mechanism does not come into contact with the arm mechanism when the arm mechanism is lowered by the driving force from the drive motor. a deceleration mechanism for applying a deceleration force to the arm mechanism from below so as to decelerate the arm mechanism by coming into contact with the arm mechanism.

In the die casting machine according to the second aspect of the present invention, as described above, the motor is provided separately from the drive motor, and the arm mechanism decelerates the arm mechanism when the arm mechanism is lowered by the driving force from the drive motor. A deceleration mechanism is provided to apply a deceleration force. Thus, like the hot water supply apparatus according to the first aspect, it is possible to provide a die casting machine capable of improving the quality of die cast products manufactured from molten metal by improving the accuracy of the amount of hot water supplied.

According to the present invention, as described above, it is possible to improve the quality of die cast products manufactured from molten metal by improving the accuracy of the amount of molten metal supplied.

BRIEF DESCRIPTION OF THE DRAWINGS It is the figure which showed typically the whole structure of the die-casting machine by one Embodiment. 1 is a diagram schematically showing the overall configuration of a hot water supply apparatus according to one embodiment; FIG. 1 is a diagram schematically showing an air circuit of a water heater according to one embodiment; FIG. (A) is a diagram schematically showing a state before the arm mechanism of the water heater according to the embodiment is supported by a deceleration mechanism for the downward movement. (B) is a diagram schematically showing the ladle position in the state of (A). (A) is a diagram schematically showing a state in which the arm mechanism of the hot water supply apparatus according to the embodiment starts to be supported by a deceleration mechanism for the downward movement. (B) is a diagram schematically showing the ladle position in the state of (A). (A) is a diagram schematically showing a state in the middle of being supported and lowered by a deceleration mechanism for the descending motion of the arm mechanism of the hot water supply apparatus according to the embodiment. (B) is a diagram schematically showing the ladle position in the state of (A). (A) is a diagram schematically showing the end of the downward movement of the arm mechanism of the hot water supply apparatus according to the embodiment. (B) is a diagram schematically showing the ladle position in the state of (A). (A) is a diagram schematically showing a state in which the arm mechanism of the hot water supply apparatus according to the embodiment is being supported and lifted by the deceleration mechanism for the lifting motion. (B) is a diagram schematically showing the ladle position in the state of (A). (A) is a diagram schematically showing a state of completion of support by a deceleration mechanism for the upward movement of the arm mechanism of the hot water supply apparatus according to the embodiment. (B) is a diagram schematically showing the ladle position in the state of (A). (A) is a diagram schematically showing a state after the lifting motion of the arm mechanism of the water heater according to the embodiment is supported by the deceleration mechanism. (B) is a diagram schematically showing the ladle position in the state of (A). FIG. 4 is a diagram schematically showing the positional relationship in the Y direction between an arm to be supported by the arm mechanism of the hot water supply apparatus according to one embodiment, a speed reduction mechanism, and a ladle;

Embodiments embodying the present invention will be described below with reference to the drawings.

A configuration of a die casting machine 1 according to one embodiment will be described with reference to FIGS. 1 to 11. FIG.

(Configuration of die casting machine)
As shown in FIG. 1, the die casting machine 1 is a horizontal machine in which a movable die 21 is horizontally moved. Further, the die casting machine 1 is a cold chamber type machine, and a liquid metal material is placed in the die 2 attached to the die casting machine 1 (the cavity C formed by the moving die 21 and the fixed die 22). is configured to manufacture a die-cast product (molded product) by injecting the molten metal M.

A die casting machine 1 includes a mold 2 , a sleeve 3 , a water heater 4 , a lid mechanism 5 , a plunger 6 and an injection device 7 .

The mold 2 is configured to form a cavity C (hollow portion) for molding a die cast product (molded product).

Specifically, the mold 2 includes a movable mold 21 and a fixed mold 22 . The fixed mold 22 is fixed to a fixed die plate 23 . The movable mold 21 is attached to a movable die plate 24 so as to be movable in a direction (X direction) to contact or separate from the fixed mold 22 . The cavity C is formed by bringing the movable mold 21 into contact with the fixed mold 22 .

The sleeve 3 accommodates the plunger 6 so as to be movable in the X direction, and is configured to supply the molten metal M. As shown in FIG.

Specifically, the sleeve 3 includes a hot water supply port 31 and a molten metal passage 32 . The sleeve 3 has a cylindrical shape. The sleeve 3 extends in the X direction. The hot water supply port 31 is provided for supplying the molten metal M into the molten metal passage 32 by the hot water supply device 4 . The hot water supply port 31 penetrates the upper side (Z1 direction side) of the sleeve 3 in the Z direction. The molten metal passage 32 is a through hole penetrating the sleeve 3 in the X direction. The molten metal passage 32 communicates with the cavity C in the X1 direction.

The hot water supply device 4 is configured to draw the molten metal M, which is a liquid metal material, from the molten metal furnace 8 (see FIG. 2) and supply (supply) the molten metal M to the sleeve 3 . Details of the water heater 4 will be described later.

The lid mechanism 5 is configured to close the hot water supply port 31 after the molten metal M is supplied into the sleeve 3 by the hot water supply device 4 .

Specifically, the lid mechanism 5 includes a lid portion 51 and an arm mechanism 52 . The lid portion 51 has a shape that follows the shape of the hot water supply port 31 when viewed from the Z1 direction. The lid portion 51 is arranged at the tip portion of the arm mechanism 52 . The arm mechanism 52 is configured to move the lid portion 51 to the hot water supply port 31 .

The plunger 6 is configured to inject the molten metal M supplied into the sleeve 3 .

Specifically, the plunger 6 has a plunger tip 61 and a plunger rod 62 . The plunger tip 61 is a member that contacts the molten metal M. As shown in FIG. The plunger tip 61 is detachably attached to the end of the plunger rod 62 on the X1 direction side. The plunger rod 62 is a member that transmits the driving force generated in the injection device 7 to the plunger tip 61 . The plunger rod 62 has a bar shape extending in the X direction. The plunger rod 62 is connected to the injection device 7 at the end on the X2 direction side.

The injection device 7 is configured to inject the molten metal M into the cavity C by moving the plunger 6 . That is, the injection device 7 is configured to reciprocate the plunger 6 within the sleeve 3 in the X direction. The injection device 7 includes a hydraulic cylinder 71 and a hydraulic circuit 72 for operating the hydraulic cylinder 71 .

(Configuration of water heater)
As shown in FIG. 2, the water heater 4 includes a ladle 41, an arm mechanism 42, drive motors 43a and 43b, and a speed reduction mechanism 44. As shown in FIG.

A ladle 41 is provided to pump up the molten metal M from the molten metal furnace 8 . Specifically, the ladle 41 includes a molten metal storage portion 41a that can store and hold the molten metal M. As shown in FIG. Further, the ladle 41 is attached to an arm 42e of the arm mechanism 42 via a shaft portion 45a so as to be rotatable (tiltable) around the shaft portion 45a. The ladle 41 is configured to be able to adjust the amount of the molten metal M pumped from the melting furnace 8 by changing the rotation angle (tilt angle) about the shaft portion 45a. Further, the ladle 41 rotates (tilts) above the molten metal supply port 31 of the sleeve 3 with the shaft portion 45a as the center of rotation, thereby pouring the molten metal M contained in the molten metal containing portion 41a into the molten metal supply port 31 of the sleeve 3. is configured to allow

The arm mechanism 42 is a moving mechanism that moves the ladle 41 . Specifically, the arm mechanism 42 is a transport mechanism that transports the ladle 41 between the melting furnace 8 and the sleeve 3 . The arm mechanism 42 is configured to move the ladle 41 that draws up the molten metal M from the molten metal furnace 8 to the sleeve 3 . Further, the arm mechanism 42 is configured to move the ladle 41 that supplies the molten metal M to the sleeve 3 to the melting furnace 8 .

The arm mechanism 42 is a link mechanism including a plurality (five) of arms 42a-42e. The plurality of arms 42a-42e are configured to operate in conjunction with each other. Thereby, the plurality of arms 42a to 42e are configured to move the ladle 41 between the melting furnace 8 and the sleeve 3 along a predetermined trajectory (not shown).

The arm 42a is connected to a drive motor 43a via a drive transmission member 43c such as a chain or belt. The arm 42a is configured to rotate in directions C1 and C2, which are directions of rotation about the shaft portion 45b, by a driving force from the drive motor 43a. The C1 direction is the direction of rotation when the ladle 41 is moved toward the sleeve 3 . The C2 direction is the direction of rotation opposite to the direction C1 and the direction of rotation when the ladle 41 is moved toward the melting furnace 8 . One longitudinal end of the arm 42a is connected to the shaft 45b. The shaft portion 45b is held by the water heater main body 4a so as to be rotatable in directions C1 and C2.

The other longitudinal end of arm 42a is connected to arm 42b via shaft 45c. Both the arm 42a and the arm 42b rotatably hold the shaft portion 45c. One longitudinal end of arm 42b is connected to arm 42c via shaft 45d. Both the arm 42b and the arm 42c rotatably hold the shaft portion 45d. One longitudinal end of the arm 42c is connected to the arm 42b via a shaft portion 45d. The other longitudinal end of arm 42c is connected to arm 42d via shaft 45e. Both the arm 42c and the arm 42d rotatably hold the shaft portion 45e. One end of the arm 42d in the longitudinal direction is connected to the arm 42c via a shaft portion 45e. Further, the arm 42d is configured to rotate around the shaft portion 45e. The shaft portion 45e is held by the water heater main body 4a so as to be rotatable around the shaft portion 45e.

The other longitudinal end of arm 42d is connected to arm 42e via shaft 45f. Both the arm 42d and the arm 42e rotatably hold the shaft portion 45f. One end of the arm 42e in the longitudinal direction is connected to the arm 42d via a shaft portion 45f. In addition, the other longitudinal end of the arm 42b is connected to the longitudinal middle of the arm 42e via a shaft 45g. A shaft portion 45a for rotating the ladle 41 is held at the other end portion of the arm 42e in the longitudinal direction so as to be rotatable around the shaft portion 45a.

Further, a hot water level detection sensor 46 is attached to the arm 42e via a holding member 46a. The molten metal surface detection sensor 46 is provided to detect the molten metal surface Ms of the molten metal M in the molten metal furnace 8 . The molten metal surface detection sensor 46 has a pair of electrode rods, and detects a change in the conduction state of the pair of electrode rods due to contact with the molten metal M in the molten metal furnace 8, thereby detecting the level of the molten metal M in the molten metal furnace 8. It is an energization sensor that detects the surface Ms of hot water.

The drive motor 43 a is a servo motor for driving the arm mechanism 42 . The drive motor 43 b is a servo motor for driving the ladle 41 . The ladle 41 is connected to a drive motor 43b via a drive transmission member 43d such as a chain or belt. The ladle 41 is configured to rotate about the shaft portion 45a by the driving force from the drive motor 43b. Both the drive motors 43a and 43b are held by the water heater main body 4a. The drive motors 43a and 43b are arranged on the opposite side of the water heater main body 4a from the arm mechanism 42 side (Y1 direction side).

Here, in the present embodiment, the water heater 4 is provided separately from the drive motor 43a, and the arm mechanism 42 decelerates the arm mechanism 42 when the arm mechanism 42 is lowered by the drive force from the drive motor 43a. A deceleration mechanism 44 is provided to apply a deceleration force to 42 . The speed reduction mechanism 44 is held by the water heater main body 4a via a holding member 47 .

The reduction mechanism 44 includes an actuator 44a having a linearly reciprocating rod 44b. The actuator 44a is an air cylinder. By adjusting the air pressure, the rod 44b of the actuator 44a, which is an air cylinder, moves linearly in the A1 direction, which is the movement direction toward the distal side, and the A2 direction, which is the movement direction toward the proximal side. It is configured. Further, the rod 44b has a support portion 44d (flange) for supporting the arm mechanism 42 at the tip portion 44c. Moreover, the rod 44b has an elongated shape and a columnar shape. In addition, the rod 44b is an example of the "reciprocating portion" in the claims.

As shown in FIG. 3, the actuator 44a, which is an air cylinder, is configured to be operated by the pneumatic circuit 9. As shown in FIG. The pneumatic circuit 9 includes an air source 91 , a booster valve 92 , an air tank 93 , a solenoid valve 94 , a silencer 95 , a speed controller 96 and a pressure switch 97 .

The air source 91 is configured to supply air, which is a power source, to the actuator 44a, which is an air cylinder. The pressure increasing valve 92 is configured to increase the pressure of air from the air source 91 . The air tank 93 is configured to store air from the air source 91 . The solenoid valve 94 is configured to switch the supply state of air from the air source 91 to the actuator 44a, which is an air cylinder. The silencer 95 is configured to suppress noise caused by the discharged air when the air is discharged from the actuator 44a, which is an air cylinder. The speed controller 96 is configured to control the speed of supplying air to the actuator 44a, which is an air cylinder, and the speed of discharging air from the actuator 44a, which is an air cylinder. The pressure switch 97 is configured to output a signal when the air pressure in the actuator 44a, which is an air cylinder, reaches a predetermined set pressure. The air source 91, the pressure increasing valve 92, the air tank 93, the solenoid valve 94, the silencer 95, the speed controller 96, the pressure switch 97, and the actuator 44a, which is an air cylinder, are interconnected via an air pipe 98. It is connected.

As shown in FIGS. 4 to 7, the speed reduction mechanism 44 rotates the plurality (five) of the arms 42a to 42e of the arm mechanism 42 by the support portion 44d when the arm mechanism 42 is lowered by the driving force from the drive motor 43a. By supporting the arm 42 a to be supported, a deceleration force is applied to the arm mechanism 42 so as to decelerate the arm mechanism 42 .

Specifically, first, the speed reduction mechanism 44 moves the arm 42a to be supported of the arm mechanism 42, which is being lowered by the driving force from the drive motor 43a, by the support portion 44d of the tip portion 44c of the rod 44b. The arm 42a is supported against movement (that is, the arm 42a to be supported is supported so as to apply a deceleration force). The deceleration mechanism 44 supports the arm 42a to be supported by the arm mechanism 42 by the support portion 44d of the tip portion 44c of the rod 44b so as to resist the movement of the arm 42a to be supported. Move in the direction of A2. At this time, the moving speed of the rod 44b in the A2 direction is constant. Further, the movement speed of the rod 44b in the A2 direction is a speed at which the support target arm 42a of the arm mechanism 42 is supported by the support portion 44d so as to resist the movement of the support target arm 42a. Such a speed is determined in advance by experiment or the like. Thus, the reduction mechanism 44 is configured to reduce the speed of the arm mechanism 42 to a lower speed than the lowering speed of the arm mechanism 42 only by the driving force from the drive motor 43a.

Further, in the present embodiment, as shown in FIG. 5, the actuator 44a of the reduction mechanism 44 has the support portion 44d of the tip portion 44c of the rod 44b which is substantially perpendicular to the longitudinal direction of the arm 42a to be supported by the arm mechanism 42. It is provided so as to support the arm 42a to be supported by the arm mechanism 42 from the direction. Specifically, the actuator 44a of the deceleration mechanism 44 supports the tip portion 44c of the rod 44b when the rod 44b has moved most to the tip side (i.e., moved most in the A1 direction, full stroke). The portion 44 d is provided to support the arm 42 a to be supported by the arm mechanism 42 from a direction substantially perpendicular to the longitudinal direction of the arm 42 a to be supported by the arm mechanism 42 . Further, when the support portion 44d of the tip portion 44c of the rod 44b supports the arm 42a to be supported by the arm mechanism 42 from a direction substantially perpendicular to the longitudinal direction of the arm 42a to be supported by the arm mechanism 42, the ladle 41 , the ladle 41 is located at a position where it lands on the molten metal M in the molten metal furnace 8 via the molten metal surface Ms.

That is, the actuator 44a of the speed reduction mechanism 44 is arranged such that the supporting portion 44d of the tip portion 44c of the rod 44b is supported by the arm in a state where the ladle 41 lands on the molten metal M in the molten metal furnace 8 via the molten metal surface Ms. It is provided so as to support the arm 42 a to be supported by the arm mechanism 42 from a direction substantially perpendicular to the longitudinal direction of the arm 42 a to be supported by the mechanism 42 . The die casting product is manufactured so that the surface Ms of the molten metal M in the melting furnace 8 is usually kept at a fixed position (designed position). expected to fluctuate. Therefore, the position at which the ladle 41 lands on the molten metal M in the melting furnace 8 via the molten metal surface Ms is the ladle position when the molten metal M in the melting furnace 8 is positioned at the designed position. 41 means the position where the molten metal M in the melting furnace 8 lands through the molten metal surface Ms.

8 to 10, the speed reduction mechanism 44 supports the arm 42a to be supported by the arm mechanism 42 with the support portion 44d when the arm mechanism 42 is raised by the driving force from the drive motor 43a. is configured to

Specifically, the speed reduction mechanism 44 supports the arm 42a to be supported by the arm mechanism 42 by the support portion 44d of the tip portion 44c of the rod 44b so as to push the arm 42a to be supported in the moving direction. Move the rod 44b in the A1 direction. At this time, the moving speed of the rod 44b in the A1 direction is constant. Further, the moving speed of the rod 44b in the A1 direction is a speed at which the supporting portion 44d pushes the supported arm 42a of the arm mechanism 42 in the moving direction of the supported arm 42a. Such a speed is determined in advance by experiment or the like. Thus, the speed reduction mechanism 44 is configured to support and assist the upward motion of the arm mechanism 42 by the driving force from the drive motor 43a.

In this embodiment, the arm 42 a to be supported has a supported portion 48 that contacts the support portion 44 d of the speed reduction mechanism 44 . The supported portion 48 is a plate-like member (plate), and is configured to be attachable/detachable to/from the main body of the arm 42a to be supported. The supported portion 48 is configured to be attached to the body of the arm 42a to be supported, for example, by a fastening member such as a bolt. In this case, the supported portion 48 is configured to be removed from the main body of the arm 42a to be supported by releasing the fastening of the fastening member. For example, when the supported portion 48 deteriorates due to wear between it and the support portion 44d of the speed reduction mechanism 44, it is removed from the main body of the arm 42a to be supported and replaced with a new supported portion 48. . The supported portion 48 is made of a material such as steel or ceramic, for example. From the viewpoint of cost reduction, it is preferable to use steel as the material for forming the supported portion 48 , and from the viewpoint of reducing wear, it is preferable to use ceramic as the material for forming the supported portion 48 . Further, from the viewpoint of suppressing wear, the supported portion 48 made of steel may be mirror-finished.

Further, the support portion 44d of the speed reduction mechanism 44 is also configured to be detachable from the tip portion 44c of the rod 44b. The support portion 44d is configured to be attached to the tip portion 44c of the rod 44b by a fastening member such as a bolt, for example. In this case, the support portion 44d is configured to be removed from the tip portion 44c of the rod 44b by releasing the fastening of the fastening member. For example, when the supporting portion 44d deteriorates due to wear between the arm 42a to be supported and the supported portion 48, the supporting portion 44d is removed from the body of the tip portion 44c of the rod 44b and replaced with a new supporting portion 44d. be done. The support portion 44d is made of a material such as steel or ceramic, for example. Although detailed description is omitted, selection of the material for forming the supporting portion 44d is the same as that for the supported portion 48 . Further, the support portion 44d has a curved support surface 44e. The support surface 44 e is provided so as to come into contact with the supported portion 48 .

As shown in FIG. 11, the deceleration mechanism 44 is arranged on the side opposite to the ladle 41 (Y2 direction side) with respect to the arm 42a to be supported in the Y direction. As a result, the speed reduction mechanism 44 can be arranged at a position that avoids the flow line of the ladle 41 that moves within the XZ plane. Further, the reduction mechanism 44 is provided so as to support the arm 42a to be supported by the Y2 direction side (arm 42a side) end of the support portion 44d. Further, the arm 42a to be supported is configured to be supported by the support portion 44d of the speed reduction mechanism 44 by the end portion of the supported portion 48 on the Y1 direction side (the speed reduction mechanism 44 side). The supported portion 48 is provided at the end of the arm 42a to be supported on the Y1 direction side (the speed reduction mechanism 44 side).

(Downward and upward movement of arm mechanism)
Next, referring to FIGS. 4 to 10, the downward movement and upward movement of the arm mechanism 42 will be described.

As shown in FIGS. 4A and 4B, the arm mechanism 42 is lowered by the drive force from the drive motor 43a. That is, the arm mechanism 42 lowers the ladle 41 for pumping up the molten metal M in the molten metal furnace 8 . During the downward movement of the arm mechanism 42, the arm 42a of the arm mechanism 42 is rotated in direction C2 by the driving force from the drive motor 43a. As a result, the supported portion 48 of the arm 42a is moved closer to the support surface 44e of the support portion 44d of the deceleration mechanism 44. As shown in FIG. Also, the ladle 41 is lowered so as to approach the surface Ms of the molten metal M in the molten metal furnace 8 . Before the supported portion 48 of the arm 42a is supported, the rod 44b of the actuator 44a of the deceleration mechanism 44 is in a state of being most moved to the distal end side (full stroke state).

Then, as shown in FIGS. 5A and 5B, when the arm 42a of the arm mechanism 42 is rotated in the direction C2 by the driving force from the drive motor 43a, the supported portion 48 of the arm 42a and the reduction mechanism The support surface 44e of the support part 44d of 44 is contacted. As a result, the supported portion 48 of the arm 42a is started to be supported by the support portion 44d of the deceleration mechanism 44. As shown in FIG. When the supported portion 48 of the arm 42a starts to be supported, the supporting portion 44d of the distal end portion 44c of the rod 44b moves the arm 42a to be supported by the arm mechanism 42 substantially in the longitudinal direction with the rod 44b moved to the distal end side. An arm 42a to be supported by the arm mechanism 42 is supported from the vertical direction. At this time, the ladle 41 is positioned just before it touches the molten metal M in the melting furnace 8 via the molten metal surface Ms.

Then, as shown in FIGS. 6A and 6B, in a state in which the arm 42a of the arm mechanism 42 is supported by the support surface 44e of the support portion 44d of the reduction mechanism 44, the driving force from the drive motor 43a causes C2 direction is further rotated. After the start of support shown in FIGS. 5A and 5B, in a state in which the arm 42a is supported by the support surface 44e of the support portion 44d of the speed reduction mechanism 44 so as to resist the movement of the arm 42a in the C2 direction, The rod 44b of the actuator 44a is moved in the A2 direction. As a result, the arm 42a is rotated in the C2 direction while a force (that is, deceleration force) resisting the movement of the arm 42a in the C2 direction by the driving force from the drive motor 43a is applied to the arm 42a. As a result, the arm mechanism 42 is lowered in a state of being decelerated by the deceleration mechanism 44 . At this time, the ladle 41 lands on the molten metal M in the melting furnace 8 via the molten metal surface Ms.

7A and 7B, in a state in which the arm 42a of the arm mechanism 42 is supported by the support surface 44e of the support portion 44d of the deceleration mechanism 44, the driving force from the drive motor 43a causes C2 direction is further rotated. Then, when the molten metal surface Ms of the molten metal M in the molten metal furnace 8 is detected by the molten metal surface detection sensor 46, the downward movement of the arm mechanism 42 is stopped. That is, the movement of the arm 42a in the rotation direction C2 by the driving force from the drive motor 43a is stopped, and the movement of the rod 44b of the actuator 44a in the direction A2 is also stopped.

Then, the arm mechanism 42 is lifted by the driving force from the drive motor 43a. That is, the arm mechanism 42 raises the ladle 41 for pumping up the molten metal M in the molten metal furnace 8 . During the lifting operation of the arm mechanism 42, the arm 42a of the arm mechanism 42 is rotated in direction C1 by the driving force from the drive motor 43a. As a result, the ladle 41 is lifted away from the molten metal M in the melting furnace 8 . Further, when the arm mechanism 42 is raised, the arm 42a of the arm mechanism 42 is supported by the support portion 44d of the tip portion 44c of the rod 44b so as to be pushed in the C1 direction, which is the movement direction of the arm 42a. The rod 44b of 44a is moved in direction A1. As a result, the arm 42a is rotated in the C1 direction while a force assisting the movement of the arm 42a in the C1 direction by the driving force from the drive motor 43a is applied to the arm 42a. As a result, the lifting operation of the arm mechanism 42 is performed in a state assisted by the speed reduction mechanism 44 .

8A and 8B, in a state in which the arm 42a of the arm mechanism 42 is supported by the support surface 44e of the support portion 44d of the deceleration mechanism 44, the driving force from the drive motor 43a causes C1 direction is further rotated. Then, as shown in FIGS. 9A and 9B, when the rod 44b of the actuator 44a moves to the extreme end, the supported portion 48 of the arm 42a is no longer supported by the support portion 44d of the deceleration mechanism 44. be done. That is, the contact between the supported portion 48 of the arm 42a and the support surface 44e of the support portion 44d of the speed reduction mechanism 44 is released. At this time, the ladle 41 is positioned outside the molten metal M in the melting furnace 8 . That is, while the ladle 41 is rising in the molten metal M in the molten metal furnace 8, the speed reduction mechanism 44 supports the arm 42a of the arm mechanism 42. As shown in FIG. Then, as shown in FIGS. 10A and 10B, the arm 42a of the arm mechanism 42 is further rotated in the C1 direction by the driving force from the drive motor 43a, and the ladle 41 pumps up the molten metal M from the molten metal furnace 8. is moved to the sleeve 3. Then, the molten metal M is supplied to the supply port 31 of the sleeve 3 .

(Effect of this embodiment)
Effects of the present embodiment will be described.

In the present embodiment, as described above, a deceleration force is applied to the arm mechanism 42 so as to decelerate the arm mechanism 42 when the arm mechanism 42 is lowered by the drive force from the drive motor 43a. A deceleration mechanism 44 is provided to add the As compared with the case where the arm mechanism 42 is lowered only by the driving force from the drive motor 43a, the arm mechanism 42 is moved at a lower speed by the amount of deceleration due to the deceleration force applied to the arm mechanism 42 by the deceleration mechanism 44. lowering motion can be performed. As a result, when the ladle 41 descending with the downward movement of the arm mechanism 42 lands on the molten metal M in the molten metal furnace 8 via the molten metal surface Ms, the ladle 41 lands on the molten metal surface Ms. , undulation of the surface Ms of the molten metal M in the molten metal furnace 8 can be suppressed. As a result, it is possible to suppress variations in the amount of the molten metal M pumped up by the ladle 41 due to the waving of the surface Ms of the molten metal M in the molten metal furnace 8 . As a result, it is possible to improve the accuracy of the hot water supply amount. As a result, it is possible to provide the hot water supply device 4 capable of improving the quality of the die cast product manufactured from the molten metal M by improving the accuracy of the amount of hot water supplied.

Further, in the present embodiment, as described above, the speed reduction mechanism 44 is configured to have the support portion 44d. Further, when the arm mechanism 42 is lowered by the drive force from the drive motor 43a, the support portion 44d supports the arm 42a to be supported among the arms 42a to 42e of the arm mechanism 42. , to apply a deceleration force to the arm mechanism 42 so as to decelerate the arm mechanism 42 . Accordingly, the deceleration force can be applied to the arm mechanism 42 only by supporting the arm 42a to be supported. As a result, the deceleration force can be easily and simply applied to the arm mechanism 42 by the deceleration mechanism 44 .

Further, in the present embodiment, as described above, the speed reduction mechanism 44 is configured to support the arm 42a to be supported by the arm mechanism 42 with the support portion 44d when the arm mechanism 42 is raised by the driving force from the drive motor 43a. configured to As a result, the arm 42a to be supported by the arm mechanism 42 is moved up by the reduction mechanism 44 during the lifting operation of the arm mechanism 42, which is the operation of lifting the ladle 41 whose weight has increased by the amount of the held molten metal M due to the holding of the molten metal M. can be supported. As a result, compared to the case where the arm mechanism 42 is lifted only by the driving force from the drive motor 43a, the lifting motion of the arm mechanism 42 can be easily performed by the amount supported by the speed reduction mechanism 44. FIG. Further, the deceleration mechanism 44 that decelerates the arm mechanism 42 during the downward movement of the arm mechanism 42 can also be used as a support mechanism that supports the arm mechanism 42 during the upward movement of the arm mechanism 42 . As a result, unlike the case where a support mechanism is provided separately and independently from the reduction mechanism 44, it is possible to facilitate the upward movement of the arm mechanism 42 while preventing the structure of the water heater 4 from becoming complicated.

Further, in this embodiment, as described above, the reduction mechanism 44 is configured to include the actuator 44a having the rod 44b that linearly reciprocates. Also, the rod 44b is configured to have a support portion 44d at the tip portion 44c. As a result, the reciprocating motion of the rod 44b of the actuator 44a of the deceleration mechanism 44 is used to support the arm 42a to be supported by the support portion 44d of the tip portion 44c of the rod 44b while applying a deceleration force to the arm mechanism 42. can be done. As a result, the deceleration force can be applied to the arm mechanism 42 more easily by the deceleration mechanism 44 .

Moreover, in this embodiment, as described above, the actuator 44a is configured to be an air cylinder. Accordingly, an air cylinder having a simple structure can be used as the actuator 44a.

Further, in the present embodiment, as described above, the actuator 44a is moved from the arm mechanism 42 by the support portion 44d of the tip portion 44c of the rod 44b in a direction substantially perpendicular to the longitudinal direction of the arm 42a to be supported by the arm mechanism 42. is provided so as to support the arm 42a to be supported. Accordingly, when the arm 42a to be supported is supported by the arm mechanism 42, the load applied from the arm 42a to be supported to the support portion 44d of the tip portion 44c of the rod 44b can be applied along the axial direction of the rod 44b. . As a result, it is possible to suppress the lateral load (the load in the direction crossing the axial direction of the rod 44b) from being applied to the rod 44b of the actuator 44a. As a result, the arm 42a to be supported by the arm mechanism 42 can be supported by the rod 44b of the actuator 44a while suppressing the load (lateral load) on the rod 44b of the actuator 44a.

Further, in the present embodiment, as described above, when the rod 44b of the actuator 44a is moved most to the distal end side, the support portion 44d of the distal end portion 44c of the rod 44b moves the arm 42a to be supported by the arm mechanism 42. It is provided so as to support the arm 42a to be supported by the arm mechanism 42 from a direction substantially perpendicular to the longitudinal direction. As a result, in a state where the rod 44b of the actuator 44a is likely to receive a lateral load because the rod 44b has moved most toward the distal end side, it is possible to suppress the lateral load from being applied to the rod 44b of the actuator 44a. As a result, when the arm 42a to be supported by the arm mechanism 42 is supported, it is possible to effectively suppress the lateral load from being applied to the rod 44b of the actuator 44a.

Further, in the present embodiment, as described above, when the actuator 44a is positioned at the position where the ladle 41 lands on the molten metal M in the molten metal furnace 8 via the molten metal surface Ms, the tip portion 44c of the rod 44b A support portion 44d is provided so as to support the arm 42a to be supported by the arm mechanism 42 from a direction substantially perpendicular to the longitudinal direction of the arm 42a to be supported by the arm mechanism 42. As shown in FIG. As a result, it is possible to prevent a lateral load from being applied to the rod 44b of the actuator 44a just before the ladle 41 lands on the molten metal M in the molten metal furnace 8 via the molten metal surface Ms. As a result, in a state in which the arm 42a to be supported by the arm mechanism 42 is well supported by the support portion 44d of the tip portion 44c of the rod 44b of the actuator 44a, the molten metal surface Ms of the ladle 41 on the molten metal M in the molten metal furnace 8 Hot water can be applied via

Further, in the present embodiment, as described above, the support portion 44d is configured to have the curved support surface 44e. Thus, when the arm 42a to be supported by the arm mechanism 42 is supported by the support portion 44d of the speed reduction mechanism 44, the arm 42a to be supported by the arm mechanism 42 and the curved support surface 44e can be brought into contact with each other. As a result, it is possible to reduce the occurrence of abrasion between the support surface 44e of the support portion 44d of the speed reduction mechanism 44 and the arm 42a to be supported by the arm mechanism 42. FIG.

Further, in this embodiment, as described above, the arm 42a to be supported is configured to have the supported portion 48 that contacts the support portion 44d. Also, the supported portion 48 is configured to be detachable. Accordingly, when wear occurs in the supported portion 48 of the arm 42a to be supported by the arm mechanism 42 due to the support by the support portion 44d of the speed reduction mechanism 44, only the supported portion 48 configured to be detachable can be removed. can be replaced. As a result, compared to the case where the arm 42a to be supported by the arm mechanism 42 is replaced, the replacement work of the worn portion can be easily performed, and the time required for the replacement work can be shortened.

Further, in the present embodiment, as described above, the supported portion 48 is configured as a plate-like member. Accordingly, the supported portion 48 can be configured with a simple configuration.

[Modification]
It should be noted that the embodiments disclosed this time should be considered as examples and not restrictive in all respects. The scope of the present invention is indicated by the scope of claims rather than the description of the above-described embodiments, and includes all modifications (modifications) within the scope and meaning equivalent to the scope of claims.

For example, in the above embodiment, an example in which the die casting machine is configured horizontally has been shown, but the present invention is not limited to this. In the present invention, the die casting machine may be configured vertically.

Further, in the above-described embodiment, the hot water level detection sensor is an energization sensor, but the present invention is not limited to this. In the present invention, the hot water level detection sensor may be any sensor as long as it can perform the function of detecting the hot water level. For example, the hot water level detection sensor may be an optical sensor.

Further, in the above-described embodiment, an example is shown in which the speed reduction mechanism is configured to support the arm to be supported by the arm mechanism by the supporting portion when the arm mechanism is raised by the driving force from the drive motor. The present invention is not limited to this. In the present invention, if the arm mechanism is decelerated when the arm mechanism is lowered by the drive force from the drive motor, the speed reduction mechanism is not necessarily used when the arm mechanism is raised by the drive force from the drive motor. , the supporting portion may not be configured to support the arm to be supported by the arm mechanism.

Moreover, although the actuator of the speed reduction mechanism is an air cylinder in the above embodiment, the present invention is not limited to this. In the present invention, the actuator of the reduction mechanism may be an actuator provided with a gear mechanism for linearly reciprocating the reciprocating portion.

Further, in the above embodiment, the actuator supports the arm to be supported by the arm mechanism from a direction substantially perpendicular to the longitudinal direction of the arm to be supported by the arm mechanism. Although the example provided so that it may carry out was shown, this invention is not limited to this. In the present invention, the actuator is provided so that the supporting portion at the distal end of the reciprocating portion necessarily supports the arm to be supported by the arm mechanism from a direction substantially perpendicular to the longitudinal direction of the arm to be supported by the arm mechanism. It does not have to be

Further, in the above-described embodiment, the support portion of the speed reduction mechanism has a curved support surface, but the present invention is not limited to this. In the present invention, the support portion of the speed reduction mechanism may have a planar support surface.

Further, in the above embodiment, an example in which the supported portion of the arm mechanism is detachable has been described, but the present invention is not limited to this. In the present invention, the supported portion of the arm mechanism does not necessarily have to be detachable.

Reference Signs List 1 die casting machine 4 hot water supply device 7 injection device 8 melting furnace 41 ladle 42 arm mechanism 42a to 42e arm 42a arm to be supported 43a drive motor 44 reduction mechanism 44a actuator 44b rod (reciprocating portion)
44c tip portion 44d support portion 44e support surface 48 supported portion M molten metal Ms molten metal surface

Claims (12)

A ladle for pumping molten metal from the melting furnace,
an arm mechanism including a plurality of arms for moving the ladle;
a drive motor that drives the arm mechanism;
It is provided separately from the drive motor, and when the arm mechanism is lowered by the driving force from the drive motor, the arm mechanism contacts the arm mechanism from a non-contact state to decelerate the arm mechanism. a deceleration mechanism that applies a deceleration force to the arm mechanism from below . The deceleration mechanism has a support portion, and supports an arm to be supported among the plurality of arms of the arm mechanism by the support portion when the arm mechanism is lowered by a driving force from the drive motor. 2. The water heater according to claim 1, wherein a deceleration force is applied to said arm mechanism so as to decelerate said arm mechanism. 3. The deceleration mechanism according to claim 2, wherein the deceleration mechanism is configured to support the arm of the arm mechanism to be supported by the support portion when the arm mechanism is raised by driving force from the drive motor. water heater. The speed reduction mechanism includes an actuator having a reciprocating portion that linearly reciprocates,
4. The hot water supply apparatus according to claim 2, wherein said reciprocating portion has said support portion at its tip. The water heater according to claim 4, wherein said actuator is an air cylinder. In the actuator, the support portion at the tip of the reciprocating portion supports the support target arm of the arm mechanism from a direction substantially perpendicular to the longitudinal direction of the support target arm of the arm mechanism. The water heater according to claim 4 or 5, provided with a In the actuator, in a state in which the reciprocating portion has moved most to the distal end side, the support portion at the distal end portion of the reciprocating portion moves from a direction substantially perpendicular to the longitudinal direction of the arm to be supported of the arm mechanism. 7. The hot water supply apparatus according to claim 6, wherein the arm mechanism is provided to support the arm to be supported. In the actuator, when the ladle is positioned at a position where it lands on the molten metal in the molten metal furnace through the molten metal surface, the support portion at the tip of the reciprocating portion is the support object of the arm mechanism. 8. The hot water supply apparatus according to claim 6, wherein the support target arm of the arm mechanism is supported from a direction substantially perpendicular to the longitudinal direction of the arm of the arm mechanism. The water heater according to any one of claims 2 to 8, wherein said support portion has a curved support surface. The arm to be supported has a supported portion that contacts the supporting portion,
The water heater according to any one of claims 2 to 9, wherein said supported portion is detachable. 11. The water heater according to claim 10, wherein said supported portion is a plate-like member. an injection device for injecting molten metal;
a hot water supply device that supplies the molten metal to the injection device,
The water heater is
a ladle for pumping the molten metal from the melting furnace;
an arm mechanism including a plurality of arms for moving the ladle;
a drive motor that drives the arm mechanism;
It is provided separately from the drive motor, and when the arm mechanism is lowered by the driving force from the drive motor, the arm mechanism contacts the arm mechanism from a non-contact state to decelerate the arm mechanism. a speed reduction mechanism that applies a speed reduction force to the arm mechanism from below .

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