Mold falling prevention device

Abstract

To regulate falling of a mold and release the regulation without requiring a special operation of an operator, and to simplify a device configuration compared with a conventional one.SOLUTION: The first die fall prevention device 60 prevents the die 10 from falling from the elevating platform for delivery 34 in the die opening / closing device including the elevating platform for delivery 34 and the immovable platform 31. A turning stopper member 61 having a turning side stopper part 61a for regulating the fall of the die 10 is turnably provided on the side of the elevating base 34 for delivery. The rotation stopper member 61 is biased by its own weight to a standing position where the falling of the die 10 is restricted. The rotation stopper member 61 has a rotation side contact part 61b. An immobile side abutting part 64 for releasing the regulation by abutting on the rotation side abutting part 61b and rotating the rotation stopper member 61 when the lowering of the elevating / lowering base 34 for delivery is completed is provided on the immobile base 31 side.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The technology disclosed in this specification relates to a mold fall prevention device. More specifically, it relates to a mold fall prevention device in a mold-related device used in the production of molded products formed using a mold. Examples of mold-related devices include a mold opening / closing device that opens and closes molds (specifically, fixed molds and movable molds), a mold transport cart that transports molds, and a mold changing device that changes molds. [Background technology]

[0002] For example, Patent Document 1 describes a conventional mold-transporting cart with a lifter, which runs on rails carrying a replacement mold. The cart includes a telescopic lifter that can raise or lower the loaded mold, and a cylinder that extends or retracts the lifter. The cart is provided with a stopper equipped with a piston rod to prevent the loaded mold from falling. The stopper is structured so that the piston rod can be extended or retracted by introducing or extracting pressurized oil. That is, extending the piston rod prevents the mold from falling, and withdrawing the pressurized oil releases the restriction. Note that in Patent Document 1, the stopper corresponds to the "mold fall prevention device" as defined in this specification, and the piston rod corresponds to the "lifting stopper member" as defined in this specification. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 3-239520 Summary of the Invention [Problem to be solved by the invention]

[0004] According to Patent Document 1, an operator must operate the pressure oil each time the piston rod is extended or retracted. In addition, a pressure oil circuit is required, which complicates the device configuration related to the stopper.

[0005] The problem that the technology disclosed in this specification aims to solve is to be able to restrict and release the drop of a mold without requiring the worker to perform any special operations, and to simplify the device configuration compared to conventional methods. [Means for solving the problem]

[0006] In order to solve the above problems, the technology disclosed in this specification takes the following measures.

[0007] The first means is a mold-related device comprising a transfer lifting platform that can be raised and lowered and on which a mold is placed so as to be reciprocating in a horizontal direction, and a stationary platform that is stationary and on which the mold, which has been moved in one direction in the horizontal direction from the transfer lifting platform at the lowered position of the transfer lifting platform, is placed so as to be reciprocating in the same horizontal direction as the transfer lifting platform, and is a mold drop prevention device that prevents the mold from falling in one direction in the horizontal direction from the transfer lifting platform, and on the transfer lifting platform side, a rotation stopper member having a rotation side stopper portion at its upper end that restricts the fall of the mold is rotatably mounted. This is a mold fall prevention device that is rotatable around a fulcrum, and the rotation stopper member is biased by its own weight to an upright position that prevents the mold from falling. The rotation stopper member has a rotation side abutment portion that is located below the height position of the rotation side stopper portion and above the height position of the rotation fulcrum and protrudes laterally, and the stationary platform side is provided with a stationary side abutment portion that abuts against the rotation side abutment portion when the transfer lifting platform has finished descending, thereby rotating the rotation stopper member and releasing the restriction.

[0008] According to the first aspect, when the rotation stopper member on the transfer platform is biased to the upright position by its own weight, a mold attempting to fall in one horizontal direction from the transfer platform abuts against the rotation-side stopper member of the rotation stopper member. This prevents the mold from falling in one horizontal direction from the transfer platform. Furthermore, when the transfer platform has finished descending, the rotation-side abutment member of the rotation stopper member abuts against the stationary abutment member on the stationary platform, causing the rotation stopper member to rotate, thereby releasing the mold from falling. Furthermore, when the transfer platform ascends from the lowered position, the rotation-side abutment member separates from the stationary abutment member on the stationary platform, causing the rotation stopper member to return to the upright position by its own weight. Therefore, mold fall prevention and release can be performed without requiring any special operation by the operator. Furthermore, the hydraulic circuit previously required is no longer necessary, simplifying the device configuration compared to conventional devices.

[0009] The second means is a mold-related device that includes a fixed table on which a mold is placed so that it can move back and forth horizontally, and an advancing / retreating member that is movable in an advancing / retreating direction relative to the mold on one side of the mold placed on the fixed table, and is a mold fall prevention device that prevents the mold from falling to one side from the fixed table, wherein on the fixed table side, a lifting / lowering stopper member having a lifting / lowering side stopper portion at its upper end that regulates the fall of the mold is provided so as to be able to rise and fall, the lifting / lowering stopper member is biased by an elastic member to an elevated position that regulates the fall of the mold, the lifting / lowering stopper member has a contact operating portion, and on the advancing / retreating member side, a contacting portion on the contacting operating portion that comes into contact with the contact operating portion at the end of advancement to lower the lifting / lowering stopper member, thereby releasing the regulation.

[0010] According to the second aspect, when the lift stopper member on the stationary base is biased to the raised position by the elastic member, a die attempting to fall to one side from the stationary base abuts against the lift stopper portion of the lift stopper member. This prevents the die from falling to one side from the stationary base. Furthermore, when the advancing / retreating member finishes advancing, the advancing / retreating-side abutment abuts against the abutment operating portion of the lift stopper member, causing the lift stopper member to descend, thereby releasing the restriction on the die from falling. Furthermore, when the advancing / retreating member retracts from the advanced position, the advancing / retreating-side abutment portion of the advancing / retreating member separates from the abutment operating portion of the lift stopper member, and the lift stopper member is returned to the raised position by the elastic member. Therefore, the die can be prevented from falling and released without requiring any special operation by the operator. Furthermore, the hydraulic circuit previously required is no longer necessary, simplifying the device configuration compared to conventional devices.

[0011] The third means is a mold fall prevention device of the second means, in which the mold-related device is a mold opening / closing device that includes one split mold holding member that is provided on the advancing / retreating member side and is capable of holding one split mold of the mold placed on the fixed table, and the other mold holding member that is provided on the fixed table side and is capable of holding the other split mold of the mold.

[0012] According to the third aspect, the mold opening and closing device, which is a mold-related device, holds one split mold of a mold placed on a fixed base with one mold holding member on the advancing and retreating member side, and holds the other split mold of the mold with the other mold holding member on the fixed base side, and can open and close one split mold with respect to the other split mold. This makes it easy to perform mold maintenance. [Effects of the Invention]

[0013] According to the technology disclosed in this specification, it is possible to restrict and release the drop of a mold without requiring the worker to perform any special operations, and the device configuration can be simplified compared to conventional techniques. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a front view showing an outline of a mold according to one embodiment. [Figure 2] FIG. 2 is a perspective view showing a mold opening / closing device and a mold transport cart. [Figure 3] FIG. 2 is a right side view showing the mold opening and closing device. [Figure 4] FIG. 2 is a plan view showing a mold opening and closing device. [Figure 5] FIG. 5 is a cross-sectional view taken along the line VV in FIG. 4. [Figure 6] 10 is a perspective view showing a state in which a mold is held between both holding members of the opening and closing device main body. FIG. [Figure 7] 10 is a plan view showing a state in which a mold is held between both holding members of the opening and closing device main body. FIG. [Figure 8] FIG. 8 is a cross-sectional view taken along the line VIII-VIII in FIG. 7. [Figure 9] FIG. 10 is a front view showing the fall prevention state of the first die fall prevention device. [Figure 10] FIG. 10 is a front view showing the first die fall prevention device in a released state. [Figure 11] FIG. 10 is a rear view showing the fall prevention state of the second die fall prevention device. [Figure 12] FIG. 10 is a rear view showing the second die fall prevention device in a released state. DETAILED DESCRIPTION OF THE INVENTION

[0015] An embodiment for implementing the technology disclosed in this specification will be described below with reference to the drawings. In this embodiment, a mold-related device is exemplified by a mold opening and closing device used when performing maintenance such as internal cleaning, inspection, and rust prevention of the mold. A mold transport cart is used to carry the mold into and out of the mold opening and closing device. The mold opening and closing device is also equipped with mold fall prevention devices (first mold fall prevention device and second mold fall prevention device). Therefore, after describing the mold, the mold transport cart, and the mold opening and closing device, the first mold fall prevention device and the second mold fall prevention device will be described in order. Note that the orientations used in the description of this embodiment are defined as shown by arrows in each drawing.

[0016] (Mold) FIG. 1 is a front view showing an outline of a mold. As shown in FIG. 1, mold 10 has a pair of split molds, namely, a fixed mold 11 and a movable mold 13. Mold 10 has an external appearance of a rectangular parallelepiped shape that is longer in the vertical direction. A molding space (cavity) 15 having a shape corresponding to the desired molded product is formed between fixed mold 11 and movable mold 13. Movable mold 13 is equipped with an ejector mechanism 16 for pushing the molded product out of molding space 15. Mold 10 is a cassette-type mold that can be exchanged with an injection molding machine depending on the molded product to be molded.

[0017] Fixed mold side engagement holes 12 are provided at the top and bottom of the front surface of the fixed mold 11. A clamp rod (not shown) of each fixed mold toggle clamp 46 (see FIG. 3), which will be described later, can be engaged with (inserted into) and disengaged from each fixed mold side engagement hole 12. Although not shown, a fixed mold side engagement hole similar to the lower fixed mold side engagement hole 12 is also provided at the bottom of the back surface of the fixed mold 11.

[0018] Movable mold side engagement holes 14 are provided at the top and bottom of the front surface of the movable mold 13. A clamp rod (not shown) of each movable mold toggle clamp 58 (see FIG. 4), which will be described later, can be engaged with (removably inserted into) each movable mold side engagement hole 14. Although not shown, a movable mold side engagement hole similar to the lower movable mold side engagement hole 14 is also provided at the bottom of the back surface of the movable mold 13.

[0019] A lock lever 18 that can connect and disconnect the fixed die 11 is provided rotatably around a vertical axis at the lower front surface of the movable die 13. The tip (left end in FIG. 1) of the lock lever 18 is provided so as to be engageable with and disengageable from the fixed die 11. When the tip of the lock lever 18 engages with the fixed die 11, the fixed die 11 is connected to the movable die 13. When the engagement of the lock lever 18 with the fixed die 11 is released, the fixed die 11 and the movable die 13 can be separated (see the two-dot chain line 13 in FIG. 1).

[0020] The lock lever 18 is biased by a spring means (not shown) in the direction of engagement with the fixed mold 11. When the clamp rod of the movable mold toggle clamp 58 (see FIG. 4) is engaged (inserted) into the lower movable mold side engagement hole 14, the clamp rod presses the other end (the end on the movable mold 13 side) of the lock lever 18 against the spring means, thereby releasing the engagement of the lock lever 18 with the fixed mold 11. Although not shown, a lock lever similar to the lock lever 18 is also provided at the lower part of the back surface of the movable mold 13.

[0021] (Mold transport cart 20) Fig. 2 is a perspective view showing the mold opening / closing device 30 and the mold transport cart 20. As shown in Fig. 2, the mold transport cart 20 is provided with a cart lifting platform 23 that can be raised and lowered in a horizontal state, i.e., whose height position can be adjusted, via a cart lifting device 22 including X-shaped legs 22a for the cart, on a wheeled, hand-pushed cart body 21. Part of the cart lifting device 22 is omitted in Fig. 2.

[0022] A pair of left and right carriage roller conveyors 24 capable of transporting the mold 10 in the front-to-rear direction are provided on the carriage lifting platform 23. The mold 10 is placed on the carriage lifting platform 23 so that it can move back and forth horizontally, i.e., in the front-to-rear direction, via both carriage roller conveyors 24. A pair of left and right carriage guide plates 25 extending in the front-to-rear direction are provided on the carriage lifting platform 23. The left carriage guide plate 25 prevents the mold 10 from shifting to the left. The right carriage guide plate 25 prevents the mold 10 from shifting to the right. In Figure 2, the right carriage roller conveyor 24 is hidden by the right guide plate 25.

[0023] (Mold opening / closing device 30) As shown in Fig. 2, the mold opening and closing device 30 includes an opening and closing device main body 40 provided on the front of a stationary base 31, and a delivery device 32 provided on the rear of the stationary base 31. The delivery device 32 delivers the mold 10 between the mold transport cart 20 and the opening and closing device main body 40. The mold opening and closing device 30 corresponds to the "mold-related device" referred to in this specification. Fig. 3 is a right side view showing the mold opening and closing device 30, Fig. 4 is a plan view of the same, and Fig. 5 is a cross-sectional view taken along line VV in Fig. 4.

[0024] As shown in Fig. 3, the delivery device 32 is provided with a delivery lifting platform 34 that can be raised and lowered in a horizontal state, i.e., its height position can be adjusted, via a delivery lifting device (not shown) similar to the cart lifting device 22, on a fixed platform 31. As shown in Fig. 5, a pair of delivery roller conveyors 35 (left and right) that can transport the mold 10 in the front-to-rear direction are provided on the delivery lifting platform 34 (see Fig. 4). The mold 10 is placed on the delivery lifting platform 34 via both delivery roller conveyors 35 so that it can reciprocate horizontally, i.e., in the front-to-rear direction.

[0025] The delivery lifting platform 34 is provided with a pair of left and right delivery guide plates 36 extending in the front-to-rear direction. The left delivery guide plate 36 prevents the mold 10 from shifting to the left. The right delivery guide plate 36 prevents the mold 10 from shifting to the right. As shown in FIG. 4, a front positioning rod 37 and a rear positioning rod 38 are detachably (removably) mounted on each of the delivery guide plates 36. The front positioning rod 37 restricts the forward movement of the mold 10 placed on the delivery lifting platform 34. The rear positioning rod 38 restricts the rearward movement of the mold 10.

[0026] As shown in Fig. 4, the opening / closing device main body 40 is provided with a pair of left and right stationary roller conveyors 41 that are capable of transporting the mold 10 in the front-to-rear direction on a stationary base 31. The right stationary roller conveyor 41 is shorter than the left stationary roller conveyor 41 and is arranged in parallel with the rear part of the left stationary roller conveyor 41. A plurality of free ball bearings 42 are arranged on the right side of the front part of the left stationary roller conveyor 41. In this embodiment, the free ball bearings 42 are arranged in two left and right rows of three in the front-to-rear direction.

[0027] When the delivery lift 34 is in its lowered position (see the two-dot chain line 34 in Figure 3), the mold 10 can be delivered between the delivery lift 34 and the fixed base 31. The mold 10 is placed on the fixed base 31 via two stationary roller conveyors 41 and a plurality of free ball bearings 42 so that it can move back and forth in the horizontal direction, i.e., the front and rear directions. The plurality of free ball bearings 42 support the movable mold 13 so that it can also move in the left and right directions. A stop portion 43 is provided on the fixed base 31. The stop portion 43 stops the mold 10, which is being transported forward from the delivery lift 34, at a fixed position by contacting it.

[0028] As shown in Figure 5, a fixed mold holding member 45 in the shape of a rectangular frame plate is provided on the fixed base 31 so as to be rotatable about a horizontal axis extending in the front-to-rear direction. The fixed mold holding member 45 can be moved between a vertically upright position and a horizontally tilted position tilted counterclockwise from the upright position (see the two-dot chain line 45 in Figure 5). In the upright position, the fixed mold holding member 45 faces the left side of the mold 10 (specifically, the fixed mold 11) placed in a fixed position on the fixed base 31 side (see Figure 8). A fixed mold handle 48 is provided on the fixed base 31 (see Figure 2). The fixed mold holding member 45 is rotated by operating the fixed mold handle 48.

[0029] As shown in FIG. 3, the fixed mold holding member 45 is provided with three fixed mold toggle clamps 46. Each fixed mold toggle clamp 46 has a clamp rod (not shown) that can be manually extended and retracted. The tip of each clamp rod can be engaged with and disengaged (inserted and detached) from each fixed mold side engagement hole 12 of the fixed mold 11. The fixed mold 11 is fixed to and released from the fixed mold holding member 45 by engaging and disengaging each clamp rod with each fixed mold side engagement hole 12. When the fixed mold 11 is fixed to the fixed mold holding member 45, the fixed mold 11 is held by the fixed mold holding member 45. The fixed mold 11 corresponds to the "other split mold" as defined in this specification. The fixed mold holding member 45 corresponds to the "other fixed mold holding member" as defined in this specification.

[0030] As shown in Fig. 5, a horizontal plate-like slide member 50 is provided on the fixed base 31 so as to be movable back and forth (left and right) via a pair of front and rear guide rails 51 (see Fig. 4). A pair of front and rear engagement protrusions 50a protrude from the left end of the top surface of the slide member 50.

[0031] A connecting rotation member 52 is provided on the fixed base 31 so as to be rotatable about a horizontal axis extending in the front-to-rear direction. The connecting rotation member 52 can be moved between a horizontally tilted position and a vertically standing position (see the two-dot chain line 52 in Figure 5) in which it stands upright in a counterclockwise direction from the tilted position. A movable mold handle 54 is provided on the fixed base 31 (see Figure 2). The connecting rotation member 52 is rotated in response to operation of the movable mold handle 54.

[0032] A pair of front and rear connecting devices 57 are provided on the connecting and rotating member 52 (see Figure 7). A rectangular frame-shaped movable mold holding member 56 (see Figure 4) is detachably connected to the connecting and rotating member 52 via both connecting devices 57. The connecting and rotating member 52 can rotate between a tilted position and an upright position while the movable mold holding member 56 is connected to it (see two-dot chain lines 52, 56 in Figure 5).

[0033] Although not shown, the lower surface of the movable mold holding member 56 is formed with two engaging recesses that can be engaged with and disengaged from the two engaging protrusions 50a of the slide member 50. The movable mold holding member 56 is held in a vertically erect position on the slide member 50 by engaging the two engaging recesses with the two engaging protrusions 50a. Furthermore, when the movable mold holding member 56 is in the erect position, it is connected and disconnected by the two connecting devices 57. By disconnecting the two connecting devices 57, the movable mold holding member 56 can move (advance and retreat) in the left-right direction together with the slide member 50.

[0034] As shown in FIG. 4, the movable mold holding member 56 is provided with three movable mold toggle clamps 58. Each movable mold toggle clamp 58 has a clamp rod (not shown) that can be manually inserted and removed. The tip of each clamp rod can be engaged with and disengaged from the movable mold side engagement hole 14 of the movable mold 13. The movable mold 13 is fixed to and released from the movable mold holding member 56 by engaging and disengaging each clamp rod with each movable mold side engagement hole 14. In addition, the lock lever 18 is connected and disconnected to and from the fixed mold 11 by engaging and disengaging the clamp rod with the lower movable mold side engagement hole 14. The movable mold 13 is held by the movable mold holding member 56 by being fixed to the movable mold holding member 56. The movable mold 13 corresponds to the "one split mold" as defined in this specification. The movable mold holding member 56 corresponds to the "one mold holding member" as defined in this specification.

[0035] As shown in Fig. 5, a pair of front and rear support members 59a for supporting the fixed mold holding member 45 in the tilted position is provided on the fixed base 31 (see Fig. 4). Also, a pair of front and rear support members 59b for supporting the movable mold holding member 56 in the tilted position is provided on the fixed base 31 (see Fig. 3).

[0036] (Work procedure for maintenance of mold 10 by mold opening / closing device 30) During maintenance work, the delivery lift 34 is placed in the raised position, the fixed mold holding member 45 is placed in the upright position, and the movable mold holding member 56 is placed in the tilted position (see FIG. 2).

[0037] In this state, the worker connects the mold transport cart 20 carrying the mold 10 (see the two-dot chain line 10 in FIG. 2) to be maintained to the rear side of the delivery device 32 of the mold opening and closing device 30. Next, the worker removes the rear positioning rod 38 (see FIG. 4) from both delivery guide plates 36 of the delivery device 32, and moves the mold 10 from the cart lifting platform 23 onto the delivery lifting platform 34. The mold 10 comes into contact with the front positioning rod 37 installed on both delivery guide plates 36 and is stopped. Next, the worker installs the rear positioning rod 38 on both delivery guide plates 36 (see FIG. 4). This positions the mold 10 in the front-to-rear direction.

[0038] Next, the transfer lifting device (not shown) is operated to lower the transfer lifting platform 34 to its lowered position (see the two-dot chain line 34 in FIG. 3). Next, the worker removes the front positioning rod 37 from both transfer guide plates 36, moves the mold 10 from the transfer lifting platform 34 onto the stationary platform 31, and stops (places) it in the desired position by abutting it against the stopper 43 (see the two-dot chain line 10 in FIG. 4). As a result, the fixed mold 11 is supported by the left-side stationary roller conveyor 41 and faces the fixed mold holding member 45. The movable mold 13 is supported by a plurality of free ball bearings 42. In this state, the worker fixes the fixed mold 11 to the fixed mold holding member 45 by operating each fixed mold toggle clamp 46. The worker also installs the front positioning rod 37 on both transfer guide plates 36.

[0039] Next, the worker rotates the connecting rotation member 52 and the movable mold holding member 56 to the upright position by operating the movable mold handle 54 (see two-dot chain lines 52, 56 in Figure 5). As a result, the movable mold holding member 56 is held in the upright position on the slide member 50 via the engagement of both engaging protrusions 50a. Next, the worker operates both connecting devices 57 to release the connection to the movable mold holding member 56. Next, the worker moves (advances) the movable mold holding member 56 together with the slide member 50 to the advanced position (see Figures 6 to 8).

[0040] As a result, the movable mold holding member 56 faces the right side of the movable mold 13. At this time, the ejector mechanism 16 is placed within the frame of the movable mold holding member 56 (see Figure 6). In this state, the worker fixes the movable mold 13 to the movable mold holding member 56 by operating each movable mold toggle clamp 58. As a result, the connection of the lock lever 18 to the fixed mold 11 is released, making it possible to separate the fixed mold 11 and the movable mold 13.

[0041] Next, the worker moves the movable mold 13 and the movable mold holding member 56 together with the slide member 50 to the right, to the retracted position (see the two-dot chain line La in Figure 8). This opens the movable mold 13 relative to the fixed mold 11. The movable mold holding member 56 also comes into contact with the connecting and rotating member 52 and is stopped. In this state, by operating both connecting devices 57, the movable mold holding member 56 is connected to the connecting and rotating member 52.

[0042] Next, the worker rotates the fixed mold 11 together with the fixed mold holding member 45 to the tilted position by operating the fixed mold handle 48 (see the two-dot chain line 11 in FIG. 8). Meanwhile, the worker rotates the movable mold 13 together with the movable mold holding member 56 and the connecting rotation member 52 to the tilted position by operating the fixed mold handle 48 (see the two-dot chain line Lb in FIG. 8). By unfolding the fixed mold 11 and the movable mold 13 in this way, maintenance of the fixed mold 11 and the movable mold 13 can be performed with the parting surfaces facing upward.

[0043] Furthermore, after maintenance, the mold 10 is transferred from the mold opening / closing device 30 to the mold transport cart 20 in the reverse order of the unfolding work described above, and is transported to the desired location (a storage location such as a mold device for an injection molding machine or a mold shelf).

[0044] (1st mold fall prevention device 60) In the mold opening and closing device 30 (see FIG. 2), it is expected that a situation will occur in which, for example, an operator neglects to attach (install) the front positioning rod 37 to both delivery guide plates 36, i.e., a so-called human error. In this case, the mold 10 on the delivery lifting platform 34 in the raised position may fall to one side in the horizontal direction, i.e., forward. In addition, in the mold opening and closing device 30, it is necessary to make it possible to move the mold 10 between the delivery lifting platform 34 and the fixed platform 31 when the delivery lifting platform 34 is in the lowered position.

[0045] The first die fall prevention device 60 prevents (restricts) the fall of the die 10 at a position above the lowered position (including the vicinity of the lowered position) of the delivery lift 34, and releases the restriction on the fall at the lowered position. Figure 9 is a front view showing the first die fall prevention device 60 in a fall restriction state.

[0046] As shown in Figure 9, a rotation stopper member 61 is rotatably provided on the front end surface of the delivery lift 34 via a support shaft 62. The rotation stopper member 61 is formed in a generally arrow-shaped plate shape when viewed from the front. One of the triangular protrusions protruding to the left and right of the rotation stopper member 61 (for example, the left protrusion) serves as a rotation-side abutment portion 61b. A generally trapezoidal rotation-side stopper portion 61a protruding upward is formed at the upper end of the rotation stopper member 61. The support shaft 62 corresponds to the "rotation fulcrum" as referred to in this specification.

[0047] The rotation stopper member 61 is biased to a vertically standing position by its own weight. In this state, the rotation-side stopper portion 61a protrudes above the delivery lift 34 and faces the lower end of the front surface of the mold 10 (more specifically, the movable mold 13) on the delivery lift 34. If the mold 10 on the delivery lift 34 is about to fall forward due to human error, the mold 10 comes into contact with the rotation-side stopper portion 61a, thereby preventing the mold 10 from falling.

[0048] When the rotation stopper member 61 is in the upright position, the rotation-side contact portion 61b is located below the height position of the rotation-side stopper portion 61a and above the height position of the support shaft 62. In addition, the rotation stopper member 61 is located in the upright position when the delivery lift 34 is located at a position higher than the lowered position (including the vicinity of the lowered position).

[0049] A round bar-shaped stationary-side contact portion 64 that protrudes horizontally rearward is provided on the stationary platform 31 side. The stationary-side contact portion 64 is disposed directly below (vertically facing) the rotating-side contact portion 61b of the rotation stopper member 61 in the upright position. When the delivery lift platform 34 has finished descending, the rotating-side contact portion 61b of the rotation stopper member 61 in the upright position comes into contact with the stationary-side contact portion 64, causing the rotation stopper member 61 to rotate (see FIG. 10).

[0050] According to the first die fall prevention device 60, when the rotation stopper member 61 on the delivery lifting platform 34 side is biased to the upright position by its own weight, the die 10 that attempts to fall forward from the delivery lifting platform 34 abuts against the rotation-side stopper portion 61a of the rotation stopper member 61. This makes it possible to prevent the die 10 from falling forward from the delivery lifting platform 34.

[0051] Furthermore, when the lowering of the delivery lift 34 is completed, the rotating-side abutment portion 61b of the rotation stopper member 61 abuts against the stationary-side abutment portion 64 on the stationary base 31 side, causing the rotation stopper member 61 to rotate. When the delivery lift 34 is in the lowered position, the lift stopper member 73 is rotated to the tilted position (restriction release position) (see FIG. 10). This allows the restriction on the mold 10 from falling to be released. This allows the mold 10 to move between the delivery lift 34 and the stationary base 31.

[0052] Furthermore, when the delivery lift 34 rises from the lowered position, the rotating contact portion 61b separates from the stationary contact portion 64 on the stationary base 31 side, and the rotating stopper member 61 is returned to the upright position by its own weight (see Figure 9).

[0053] Therefore, the drop of the die 10 can be restricted and released without requiring any special operation by the operator. In addition, the pressure oil circuit that was previously required is no longer necessary, so the device configuration can be simplified compared to conventional devices.

[0054] (Second mold fall prevention device 70) In the mold opening and closing device 30 (see FIG. 4), there is a risk that the mold 10 placed on the fixed base 31 side may fall to the right (one side). Also, in the mold opening and closing device 30, it is necessary to make the movable mold 13 movable between the fixed base 31 and the movable mold holding member 56 when the movable mold holding member 56 is in the advanced position.

[0055] The second die fall prevention device 70 prevents (restricts) the fall of the movable die 13 when the movable die holding member 56 is at a position retracted from the advanced position (including the vicinity of the advanced position), and releases the restriction on the fall when the movable die holding member 56 is at the advanced position. The movable die holding member 56, which is one of the split die holding members, corresponds to the "advancing / retreating member" as referred to in this specification. Figure 11 is a rear view showing the second die fall prevention device 70 in a fall restriction state.

[0056] As shown in Figure 11, the fixed base 31, more specifically, the support base 71 that supports both stationary roller conveyors 41 and the plurality of free ball bearings 42, is provided with an anti-back type lift stopper member 73 that can be raised and lowered within a predetermined range via a bracket 72. Between the bracket 72 and the lift stopper member 73, an elastic member 74 such as a coil spring is interposed to bias the lift stopper member 73 to the raised position.

[0057] A trapezoidal block-shaped lift-up stopper portion 73a is provided at the upper end of the lift-up stopper member 73. The lift-up stopper portion 73a has an upwardly inclined surface 73b that slopes from the base end toward the tip end (rightward). When the lift-up stopper member 73 is in the raised position, the lift-up stopper portion 73a abuts (including comes close to) the lower end of the right side surface of the mold 10 (more specifically, the movable mold 13) placed on the stationary base 31, thereby preventing the mold 10 from falling to the right. A round bar-shaped contact operating portion 76 that protrudes rearward (toward the front of the paper in FIG. 11) via a stay 75 is provided at the lower end of the lift-up stopper member 73.

[0058] The movable mold holding member 56, which is supported in an upright position on the slide member 50, is provided with a trapezoidal block-shaped advancing / retreating abutment portion 77. The advancing / retreating abutment portion 77 has a downwardly inclined surface 77a that slopes from the base end toward the tip end. The advancing / retreating abutment portion 77 is disposed directly to the side (a position facing horizontally) of the abutment operating portion 76 of the elevation stopper member 73. When the movable mold holding member 56 has finished advancing, the downwardly inclined surface 77a of the advancing / retreating abutment portion 77 comes into contact with the abutment operating portion 76 of the elevation stopper member 73, causing the elevation stopper member 73 to descend.

[0059] According to the second die fall prevention device 70, when the lift stopper member 73 on the fixed base 31 side is biased to the raised position by the elastic member 74 (see FIG. 11), the die 10 that attempts to fall to the right from the fixed base 31 comes into contact with the lift side stopper portion 73a of the lift stopper member 73. This makes it possible to prevent the die 10 from falling to the right from the fixed base 31.

[0060] Furthermore, when the movable mold holding member 56 has finished advancing, the downwardly inclined surface 77a of the advancing / retreating contact portion 77 comes into contact with the contact operating portion 76 of the lift stopper member 73, causing the lift stopper member 73 to descend. When the movable mold holding member 56 is in the advanced position, the lift stopper member 73 is lowered to the lowered position (restriction release position) (see FIG. 12). This allows the restriction on the fall of the mold 10 to be released. This allows the mold 10 to move between the fixed base 31 and the movable mold holding member 56.

[0061] Furthermore, when the movable mold holding member 56 retreats from the advanced position, the advancing / retreating side abutment portion 77 of the movable mold holding member 56 separates from the abutment operating portion 76 of the lift stopper member 73, and the lift stopper member 73 is returned to the elevated position by the elastic member 74 (see Figure 11).

[0062] Furthermore, when the movable mold 13 moves to the advanced position together with the movable mold holding member 56 after mold opening, the movable mold 13 abuts against the upwardly inclined surface 73b of the elevation-side stopper portion 73a of the elevation-side stopper member 73, causing the elevation-side stopper member 73 to descend. As a result, the elevation-side stopper member 73 descends before the advance / retract side abutment portion 77 abuts against the abutment operating portion 76 of the elevation-side stopper member 73, allowing the movable mold 13 to advance to the advanced position (home position). When the movable mold 13 is in the advanced position, the abutment between the abutment operating portion 76 of the elevation-side stopper member 73 and the advance / retract side abutment portion 77 causes the elevation-side stopper member 73 to descend to the lowered position (restriction release position).

[0063] In this state, as the movable mold 13 is released from the movable mold holding member 56 by operating each movable mold toggle clamp 58, the lock lever 18 engages with the fixed mold 11, connecting the fixed mold 11 to the movable mold 13. Then, as the movable mold holding member 56 retracts, the forward / backward side abutment portion 77 moves away from the abutment operating portion 76 of the elevation stopper member 73, and the elevation stopper member 73 is returned to the elevated position by the elastic member 74 (see FIG. 11). This prevents the mold 10 from falling to the right from the stationary base 31.

[0064] Therefore, the drop of the die 10 can be restricted and released without requiring any special operation by the operator. In addition, the pressure oil circuit that was previously required is no longer necessary, so the device configuration can be simplified compared to conventional devices.

[0065] Furthermore, the mold opening and closing device 30 holds the movable mold 13 of the mold 10 placed on the stationary base 31 with the movable mold holding member 56, and can open and close the movable mold 13 relative to the stationary mold 11 while holding the stationary mold 11 of the mold 10 with the stationary mold holding member 45 on the stationary base 31 side. This allows for easy maintenance of the mold 10.

[0066] Furthermore, the mold opening and closing device 30 allows a single worker to open and close the mold 10, compared to when the mold 10 is opened and closed by a hoist. Furthermore, in the case of hoisting, the worker needs to move to a different location to open, close, or invert the mold 10, but the mold opening and closing device 30 allows maintenance of the mold 10 without the need to move to a different location. Furthermore, the mold opening and closing device 30 improves safety and shortens the work time required for maintenance, compared to when the mold is opened and closed by a hoist.

[0067] [Other embodiments] The technology disclosed in this specification is not limited to the above-described embodiment and can be implemented in various other forms. For example, the mold 10 is not limited to a cassette-type mold. Furthermore, in the mold opening and closing device 30, if only the first mold fall prevention device 70 is provided, the opening and closing device main body 40 may be omitted. Furthermore, in the mold opening and closing device 30, if only the second mold fall prevention device 70 is provided, the delivery device 32 may be omitted. Furthermore, the function of tilting the fixed mold 11 and / or the movable mold 13 in the opening and closing device main body 40 may be omitted. [Explanation of symbols]

[0068] 10. Mold 11 Fixed type (other split type) 13 Movable type (one split type) 30 Mold opening and closing device (mold-related equipment) 31 Fudodai 34 Delivery platform 45 Fixed mold holding member (other mold holding member) 56 Movable mold holding member (one mold holding member, advancing / retreating member) 60 1st mold fall prevention device (mold fall prevention device) 61 Rotation stopper member 61a Rotation side stopper portion 61b Rotation side contact portion 62 Support axis (rotational fulcrum) 64 Fixed side contact part 70 2nd mold fall prevention device (mold fall prevention device) 73 Lift stopper member 73a Lifting side stopper 74 Elastic Member 76 Contact operation part 77 Advance / retract side contact part

Claims

1. In a mold-related device comprising a delivery lifting platform that can be raised and lowered and that mounts a mold so that the mold can move back and forth in a horizontal direction, and a stationary platform that is stationary and that mounts the mold, which has been moved in one direction in the horizontal direction from the delivery lifting platform when the delivery lifting platform is in a lowered position, so that the mold can move back and forth in the same horizontal direction as the delivery lifting platform, a mold drop prevention device that prevents the mold from falling in one direction in the horizontal direction from the delivery lifting platform, a rotation stopper member having a rotation side stopper portion at an upper end thereof for restricting the dropping of the die, the rotation stopper member being rotatable about a rotation fulcrum; The rotation stopper member is biased by its own weight to an upright position that prevents the die from falling, the rotation stopper member has a rotation-side abutment portion that is located below a height position of the rotation-side stopper portion and above a height position of the rotation fulcrum and that protrudes laterally, A mold fall prevention device is provided on the stationary platform side, which abuts against the rotating platform abutment portion when the transfer platform has finished descending, thereby rotating the rotating stopper member and releasing the restriction.

2. In a mold-related device including a stationary base that is stationary and that mounts a mold so that the mold can move back and forth in a horizontal direction, and an advancing / retreating member that is movable in an advancing / retreating direction relative to the mold on one side of the mold placed on the stationary base, a mold fall prevention device that prevents the mold from falling from the stationary base to one side, a lift stopper member having a lift stopper portion at an upper end thereof for preventing the die from falling is provided on the stationary base side so as to be movable up and down; The lift stopper member is biased by an elastic member to a lift position where the lift stopper member prevents the die from falling, The lift stopper member has a contact operating portion, A die drop prevention device in which the advancing / retreating member is provided with an advancing / retreating side abutment portion that abuts against the abutment operating portion when the advancement is completed, thereby lowering the lifting / lowering stopper member and thereby releasing the restriction.

3. The die drop prevention device according to claim 2, The mold-related device is a mold opening / closing device, which includes one split mold holding member that is provided on the advancing / retreating member side and is capable of holding one split mold of the mold placed on the fixed table, and another mold holding member that is provided on the fixed table side and is capable of holding the other split mold of the mold, and is a mold drop prevention device.

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