JP2006150384A - Safety door device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the operability at the forming cycle time and the workability at the maintenance time by making the dividing structures of a safety door for shading the side surface of a forming apparatus to make individual door body to small size. <P>SOLUTION: The safety door 20 is divided into two at the unit of the size corresponding to a die opening/closing space and these divided two door bodies 21, 22 are respectively engaged with two linear grooves 25, 26 of rails 23 set at the upper part of both sides of a die casting machine (forming apparatus) through rollers 28 to be relatively shiftable and also, so that both door bodies 21, 22 are relatively shifted with a cylinder 24. At the casting cycle time, the position of the one side of door body 21 is fixed and the other side of door body 22 is shifted in the interval between the position for shading the die opening/closing space and the position for opening with the cylinder 24, and at the maintenance time, the other side of door body 22 is shifted to the one side of door body 21 side, and both are made to an overlapped state and approached to one end side of the die casting machine and the side part of a die clamping device is largely opened. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a safety door device that shields a side surface of a horizontal molding apparatus such as a horizontal die casting machine or a horizontal injection molding machine.

  For example, in a horizontal die casting machine, as shown in FIG. 8, four tie bars 4 are bridged between a fixed platen 2 fixed at both ends on a base 1 and a link housing 3. Is moved slidably through a movable plate 5 disposed on the base 1, and the movable plate 5 is moved forward and backward along the tie bar 4 by a mold clamping device 6 provided in the link housing 3. Then, the fixed mold 7 mounted on the fixed platen 2 and the movable mold 8 mounted on the movable platen 5 are opened / closed and clamped, and the injection device disposed on the back side of the fixed platen 2 in the mold-clamped state. The structure is such that the molten metal is injected into the mold from 9. In addition, the product after injection is handled by a handling device such as a robot disposed on one side (front side) of the die casting machine after the movable die 8 is moved back together with the movable platen 5 by the mold clamping device 6 (after the mold is opened). 10 is operated, and the fixed side 7 and the movable mold 8 are exchanged (die exchange) using a change table 11 arranged on the opposite side (back side) to the side on which the handling device 10 is arranged. To do.

In such a horizontal die casting machine, in addition to the movable platen including the movable mold 8, there are many movable parts such as the working part (toggle mechanism) 6a of the mold clamping device 6, and melting to the surroundings. Since metal particles are scattered, safety door devices are provided on both sides (front side and back side). As shown in FIG. 8, this safety door device includes a safety door 12 that is movably disposed along the side surface of the die casting machine. The safety door device is movable with the fixed platen 2 during a casting cycle and when a mold is changed. At the time of maintenance, one end of the die casting machine (the part where the link housing 3 and the like are arranged) is moved so that the safety door 12 is reciprocated between a position where the mold opening / closing region S with the panel 3 is shielded and opened. ) Is operated to retract the safety door 12 to the side. In addition, as this kind of safety door device, for example, as described in Patent Document 1, a safety door (safety door plate) can be moved in a direction orthogonal to a mold opening / closing direction, and a core cylinder device Some have tried to avoid interference.
Japanese Patent Laid-Open No. 10-1137559

  However, in the conventional safety door device, as shown in FIG. 8, the safety door 12 is formed in a large size so that a wide area including a part of the mold clamping device 6 can be shielded from the mold opening / closing region S. It was. For this reason, a large force is required for the movement of the safety door 12, and there is a problem that it takes time for the movement and the cycle time of casting (molding) is extended. Further, when the door body 12 is retracted to the side of the link housing 3 or the like during maintenance, the opening (entrance / exit) A formed between the movable platen 2 and the link housing 3 is small even when the door body 12 is fully retracted. There was also a problem that the nature was bad.

  The present invention has been made in view of the above-described conventional problems, and the problem is that the safety door is divided into individual structures to reduce the size of the individual doors, thereby improving the operability during the molding cycle. An object of the present invention is to provide a safety door device that greatly contributes to improvement and improvement in workability during maintenance.

  In order to solve the above problems, the present invention provides a safety door device in which a door body is disposed so as to be movable along a side surface of a horizontal molding apparatus. The door body is divided into a plurality of parts in the moving direction, and the door It is characterized by arranging the body division elements so as to be relatively movable.

  In the safety door device configured as described above, the mold opening / closing region can be shielded and opened only by moving a part of the safety door dividing element, so that the force required to move the safety door is reduced. As a result, the operability during the molding cycle is improved. Moreover, at the time of maintenance, a large doorway is ensured by bringing the safety door in a contracted state toward the end of the molding apparatus, and as a result, workability during maintenance is improved.

  According to the present invention, the safety door is divided into two parts each having a size that shields a substantially mold opening / closing region of the horizontal molding apparatus. During the molding cycle, one split element is fixed and the other split element is fixed. However, it can be set as the structure moved between the position which shields the said mold | die opening / closing area | region, and the position which opens.

  The present invention also has a configuration in which a retreat zone is set to the side of one end of the molding apparatus, and the safety door can be retreated to the retreat zone in a state where the divided elements are overlapped with each other during maintenance. Can do.

  In the present invention, the split elements of the safety door may be manually moved relative to each other. However, in order to cope with a short molding cycle, it is preferable that the safety door is relatively moved by the driving means.

  According to the safety door device of the present invention, since the safety door is divided into individual structures and the individual door bodies are miniaturized, it is possible to achieve improvement in operability during the molding cycle and improvement in workability during maintenance. .

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.

  1 to 4 show a first embodiment of a safety door device according to the present invention. Since the molding apparatus to which the safety door device according to the first embodiment is applied is the same horizontal die casting machine as that shown in FIG. 8, the same part as that shown in FIG. 8 is used here. The same reference numerals are given, and duplicate descriptions are omitted. As schematically shown in FIGS. 1 and 2, the safety door 20 according to the first embodiment includes two door bodies (dividing elements) 21 divided in units of a size corresponding to the approximate mold opening / closing region S, It consists of 22.

  Two door bodies 21 and 22 constituting the safety door 20 are mounted on rails 23 (FIGS. 3 and 4), which will be described later, installed along the side surfaces of the machine on the upper sides of both sides (front side and back side) of the die casting machine. It is supported by suspension so as to be movable relative to each other, and is relatively moved by operation of a cylinder 24 (FIGS. 3 and 4) described later. The safety door 20 expands to the size of approximately two door bodies by the relative movement of the two door bodies 21 and 22 by the expansion / contraction operation of the cylinder 24, while the size of approximately one door body. Reduce to. Therefore, the cylinder 24 is expanded and contracted with one door body 21 (hereinafter referred to as the first door body) 21 fixed to the side of the operation portion (toggle mechanism) 6a of the mold clamping device 6. Then, the other door body (hereinafter referred to as a second door body) 22 reciprocates between a position where the mold opening / closing region S is shielded and a position where it is opened. Further, after the second door body 22 is retracted to a position overlapping the first door body 21 and the safety door 20 is reduced, this is moved to the side of one end of the die casting machine (here, the side of the link housing 3). 1), a large opening (entrance / exit) A is formed between the movable platen 5 and the ring housing 3. As shown in FIG.

  Here, the rail 23 has two grooves 25 and 26 parallel to the upper surface thereof, as well shown in FIGS. Of these two grooves, one groove 25 is provided for the movement of the first door body 21, and the other groove 26 is provided for the movement of the second door body 22. More specifically, a U-shaped frame 27 is fixed to the upper ends of the door bodies 21 and 22, and each frame 27 has a pair of rollers 28 that can be engaged with the grooves 25 and 26, respectively. It is attached to the shaft. The door bodies 21 and 22 are suspended and supported by the rails 23 by engaging the rollers 28 with the corresponding grooves 25 and 26 in a state where the frame 27 is put on the rails 23. On the other hand, each door body 21, 22 is prevented from being shaken sideways by inserting a shake prevention plate 29 projecting from the lower end of each door body 21, 22 into a slit 31 provided in the floor plate 30. Accordingly, the door bodies 21 and 22 can smoothly move relative to each other along the rail 23 without interfering with each other.

  Further, as shown in FIG. 4, the frame 27 of the first door body 21 is provided with a through hole 33 that aligns with a pin hole 32 formed on the side surface of the rail 23. 21 is fixed to the rail 23 by a stopper pin 34 inserted into the pin hole 32 through the through hole 33. The pin hole 32 of the rail 23 is set at an appropriate location corresponding to the operating portion 6a (FIGS. 1 and 2) of the mold clamping device 6, whereby the first door body 21 is connected to the mold clamping device 6. The position is fixed to the side of the operating portion 6a.

  Further, the cylinder 24 described above is disposed on the upper surface of the frame 27 on the first door body 21 as shown in FIGS. The piston rod 24 a of the cylinder 24 extends in the mold opening / closing direction, and its tip is connected to one end of the frame 27 on the second door body 22 via a bracket 35. When the piston rod 24a of the cylinder 24 is extended or shortened in a state where the position of the first door body 21 is fixed by the stopper pin 34, the second door body 22 moves forward and backward with respect to the first door body 21. To move.

The operation of the safety door device configured as described above will be described below.
In the casting cycle, first, the movable platen 5 moves forward along the tie bar 4 with respect to the fixed platen 2 by the mold clamping device 6 provided in the link housing 3, and the movable die 8 is closed and clamped to the fixed die 7. In this state, the molten metal is injected from the injection device 9 into the mold. After the injection is finished, the movable platen 5 is moved backward by the mold clamping device 6, the movable mold 8 is separated from the fixed mold 7 (the mold is opened), and the product is stuck to the movable mold 8. Demolded from 7. The handling device 10 such as a robot moves into the mold opening / closing area S in time with the mold opening, receives a product from the movable mold 8 and carries it out of the die casting machine, thereby completing one cycle of casting. .

  During the casting cycle, the first door body 21 constituting the safety door 20 on the front side of the die casting machine is fixed at a position corresponding to the operating portion 6a of the mold clamping device 6 by a stopper pin 34, and the movable platen The cylinder 24 extends from the shortening side in synchronization with the forward movement of 5. Then, the second door body 22 moves forward to a position where the mold opening / closing region S is shielded, and the safety door 20 expands to the size of approximately two door bodies, and the mold clamping device 6 operates from the mold opening / closing region S. The wide range over the arrangement area of the part 6a is shielded, and thus the safety around the die casting machine is maintained. In addition, after the injection is completed, when the cylinder 24 is shortened in synchronization with the retraction (mould opening) of the movable platen 5, the second door body 22 is retreated and the mold opening / closing region S is widely opened. The product can be efficiently taken out by the handling device 10.

  On the other hand, the safety door 20 on the back side of the die casting machine maintains an enlarged state during the casting cycle, and the back side of the die casting machine is always shielded by the safety door 20. Therefore, when it is necessary to replace the mold, the second door body 22 is moved backward toward the first door body 21 whose position is fixed by the shortening operation of the cylinder 24. As a result, the mold opening / closing area S is widely opened, and an efficient mold exchange using the changeover table 11 becomes possible.

  Further, when maintenance of the mold clamping device 6 is necessary, after the safety door 20 is reduced, the stopper pin 34 is removed from the pin hole 32 of the rail 23 and the entire safety door 20 is manually retracted into the retreat zone B. Move to the side. As a result, a large opening (entrance / exit) A is formed between the movable platen 5 and the ring housing 3, and efficient maintenance work is possible.

  In the first embodiment, the cylinder 24 for relatively moving the two door bodies 21 and 22 is arranged on the first door body 21 on the position-fixed side. Of course, it may be arranged on the second door body 22 on the non-fixed side. The means for moving the two door bodies 21 and 22 relative to each other is arbitrary, and other means such as a rack and pinion mechanism, a chain drive mechanism, a belt drive mechanism or the like may be used instead of the cylinder 24. it can.

  5 and 6 show a second embodiment of the safety door device for a die-casting machine according to the present invention. The horizontal die casting machine to which the safety door device as the second embodiment is applied is the same as that of the first embodiment, and therefore the illustration of the die casting machine is omitted here. As in the first embodiment, the safety door 40 according to the second embodiment includes two door bodies (dividing elements) 41 and 42 that are divided in units corresponding to the mold opening / closing region S (FIG. 8). However, here, the two door bodies 41 and 42 are configured to be able to expand and contract in a door-bag type and are configured as a floor traveling type. Further, a chain drive mechanism 43 is adopted as means for moving the two door bodies 41 and 42 relative to each other.

  More specifically, of the two door bodies constituting the safety door 40, one door body (hereinafter referred to as the first door body) 41 is formed in a flat box shape and the other door body (hereinafter referred to as the first door body). , Which is referred to as a second door body) 42 is formed in a size capable of entering and exiting the first door body 31. Each door body 41, 42 can travel along the rail 45 by placing a roller 44 provided on the lower surface thereof on a rail 45 laid on the floor. Further, on the upper side of the retreat zone B (FIGS. 1 and 2) on the side of the link housing 3, a door pocket 46 that can accommodate the upper side of the first door body 41 is disposed using a column 47. . A guide member (roller or the like) 48 for guiding the second door body 42 is disposed inside the first door body 41, and a guide member 49 for guiding the first door body 41 is disposed inside the door pocket 46. The door bodies 41 and 42 can smoothly move relative to each other along the rail 45 without interfering the guide members 48 and 49 with the guides. Note that a stopper piece 50 that abuts the inner surface of the first door body 41 and causes the first door body 41 to follow the advance of the second door body 42 protrudes at one end of the second door body 42. It is installed. Moreover, the stopper pin 51 which regulates the retreat of the 1st door body 41 is attached to the door pocket 46 so that attachment or detachment is possible.

  On the other hand, the chain drive mechanism 43 is disposed in the door pocket 46, and includes a drive sprocket 53 that is rotated by a motor 52, and a column 54 that is erected on the side of the stationary platen 2 (FIGS. 1 and 2). A driven sprocket 55 disposed at the upper end portion and a chain 56 spanned between the drive sprocket 53 and the driven sprocket 55, and the tip of the second door body 42 is connected to the chain 56. It is connected via a bracket 57. In such a chain drive mechanism 43, as shown in FIG. 1, the chain 56 is moved to the left from the state where the stopper pin 51 restricts the backward movement of the first door body 41 and the safety door 40 is expanded. When rotated, the second door body 42 is retracted and retracted into the first door body 41, and the safety door 40 is reduced to the size of one door body. In the second door body 42, the position where the bracket 57 abuts on the first door body 41 is the retracted end. On the other hand, when the chain 56 rotates clockwise from this reduced state, the second door body 42 extends from the first door body 41, and the safety door 40 expands to the size of approximately two door bodies. Further, in this enlarged state, after removing the stopper pin 51 and allowing the first door body 41 to retreat freely, when the chain 56 is rotated counterclockwise, the second door body 42 retreats, and at the retracted end. The bracket 57 applies a force in the backward direction to the first door body 41, whereby the two door bodies 41, 42 are integrally retracted to the position of the door pocket 46.

  In the second embodiment, during the casting cycle described above, the first door body 41 constituting the front safety door 40 of the die casting machine corresponds to the operation portion 6a of the mold clamping device 6 by the stopper pin 51. The motor 52 is actuated and the chain 56 rotates clockwise in time with the advance of the movable platen 5. Then, the second door body 42 moves forward to a position where the mold opening / closing region S is shielded, and the safety door 40 expands to the size of approximately two door bodies. A wide range over the arrangement area 6a is shielded by the safety door 40 (see FIGS. 1 and 2). In addition, after the injection is completed, when the chain 56 rotates counterclockwise in synchronization with the backward movement (mold opening) of the movable platen 5, the second door body 42 moves backward and is drawn into the first door body 41. That is, the mold opening / closing region S is widely opened, which enables efficient product removal by the handling device 10.

  On the other hand, the safety door 40 on the back side of the die casting machine maintains an enlarged state during the casting cycle, and the back side of the die casting machine is always shielded by the safety door 40. If the mold needs to be replaced, the chain 56 is rotated counterclockwise by the operation of the motor 52, the second door body 42 is retracted and drawn into the first door body 41, and thereby the mold is opened and closed. The area S is widely opened, and as a result, efficient die exchange using the changeover table 11 becomes possible.

  Further, when maintenance of the mold clamping device 6 is necessary, the chain 56 is rotated counterclockwise after removing the stopper pin 51. Then, while the 2nd door body 42 reverse | retreats, the 1st door body 41 follows the movement via the bracket 57, and the 2 door bodies 41 and 42 move back to the position of the door pocket 46 integrally. . As a result, a large opening (entrance / exit) A is formed between the movable platen 5 and the ring housing 3, and efficient maintenance work is possible. Further, when the chain 56 is rotated clockwise from this state, first, the second door body 42 moves forward and extends from the first door body 41, and then the stopper piece provided on the second door body 42. 50 abuts on the inner surface of the first door body 41, the first door body 41 follows the movement (advance) of the second door body 42, and the safety door 40 returns to the original enlarged state. .

  Here, in the second embodiment, the chain drive mechanism 43 is used as means for moving the two door bodies 41, 42. However, the chain drive mechanism 43 can be replaced with belt drive means. Further, as shown in FIG. 7, for example, the means for moving the two door bodies 41 and 42 is configured to move the second door body 42 with respect to the first door body 41 by using the rack and pinion mechanism 60 and the door pocket 46. The cylinders 61 may be used for moving the first door body 41, respectively.

  In the above-described two embodiments, the safety doors 20 and 40 are divided into two parts in units of sizes corresponding to the mold opening / closing regions, but the number of divisions is arbitrary and may be three or more. Further, all of these dividing elements may be moved manually without using the above-described driving means (cylinder 24, chain driving mechanism 43). Furthermore, the safety door device including the safety doors 20 and 40 can be applied to a horizontal injection molding machine in addition to a horizontal die casting machine.

It is a top view which shows typically 1st Embodiment of the safety door apparatus of the die-casting machine which concerns on this invention. It is a side view which shows this 1st Embodiment typically. It is a perspective view which shows concretely the structure of the safety door device as this 1st embodiment. It is a front view which shows concretely the structure of the safety door device as this 1st embodiment. It is a top view which shows typically 2nd Embodiment of the safety door apparatus of the die-casting machine which concerns on this invention. It is a side view which shows this 2nd Embodiment typically. It is a side view which shows typically the modification of this 2nd Embodiment. It is a top view which shows typically the safety door apparatus of the conventional die-casting machine.

Explanation of symbols

2 Fixed platen 3 Link housing 4 Tie bar 5 Movable platen 10 Product take-out handling device 11 Changeable table 20, 40 Safety door 21, 41 First door (dividing element)
22, 42 Second door (dividing element)
23, 45 Rail 28, 44 Roller 24 Cylinder (drive means)
43 Chain drive mechanism (drive means)
34, 51 Stopper pin

Claims (4)

  A safety door device for a horizontal molding device, wherein the safety door is arranged so as to be movable along a side surface of the molding device. A safety door device in which split elements of a safety door are arranged to be relatively movable.   The safety door is divided into two parts with a size that shields the approximate mold opening / closing area of the horizontal molding apparatus. During the molding cycle, one split element is fixed in position, and the other split element opens and closes the mold opening / closing. The safety door device according to claim 1, wherein the safety door device is moved between a position for shielding the area and a position for opening the area.   2. A retreat zone is set on a side of one end of the horizontal molding apparatus, and the safety door is retreated to the retreat zone in a state where the divided elements are overlapped with each other during maintenance. Or the safety door device of 2. The safety door device according to any one of claims 1 to 3, wherein a split element of the safety door is relatively moved by a driving means.

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