JPH0741326B2 - Mold fall prevention device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device used in a mold exchanging system for preventing a mold mounted on a mold exchanging carriage or a mold mounting table from dropping from the carriage or mounting table. Regarding

[0002]

2. Description of the Related Art The following are known fall prevention devices of this type. As shown in FIGS. 20 and 21, the mold stand
A stop lever 237 is attached to a block 241 fixed on the top of 206.
Is swingably supported. The stopper portion 242 is fixed to the upper end of the stop lever 237, and the operation roller 244 is supported to the lower end. Further, on the side surface of the carriage 203, a stop release block 239 facing the operation roller 244 is provided.
Is fixed.

The stop lever 237 is in a downward position (see FIG.
(See the solid line in 1)), the stopper 2
42 is switched to the protruding posture A. This prevents the operated portion 217 of the die 213 from moving leftward in FIG. 20, and prevents the die 213 from falling from the stand 206. When the mold 213 is transferred from the stand 206 to the carriage 203, first, the carriage 203 is moved rightward in FIG. 21 to move the stop release block 239 from the position indicated by the two-dot chain line diagram to the position indicated by the one-dot chain line diagram. Let Then, the stop lever 237 swings (see the alternate long and short dash line diagram), the stopper portion 242 is switched to the retracted posture B, and the stop is released. As a result, the mold 213 can be moved leftward in FIG.

[0004]

The above-mentioned conventional example has the following problems. When a large number of pedestals 206 are arranged side by side in the left-right direction in FIG.
When the carriage 203 is moved to the position of 6, the stop release block 239 also temporarily releases the other stop levers 237 that do not need to be released during the movement. When some impact is applied to the mold 213 in such a state, the mold 213 may drop from the mounting table 206. An object of the present invention is to reliably prevent the mold from falling.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a die fall prevention device, for example, as shown in FIG.
From FIG. 7, or FIG. 18 and FIG.

Stop means 37 is provided at one end of the two opposite ends of the mold placing table 6 and the mold exchanging carriage 3, and the stop releasing means 3 is provided at the other end.
9 is provided. A housing 41 is attached to the stop means 37.
And a stopper tool 42 supported by the housing 41
And an operation tool 44 connected to the stopper tool 42. The stopper tool 42 is configured to be switchable between a projecting posture A projecting above the lower end of the received portion 19 of the mold 13 and a retracting posture B retracting below the lower end. The operation tool 44 is the stopper tool 42.
Is configured to be switchable between the projecting operation position C for switching to the projecting posture A and the retracting operation position D for switching the stopper tool 42 to the retracting position B. The stop release means 39 is provided with an output section 53 that is moved back and forth between the other end and the one end. The output section 53
Is released from the engagement with the operation tool 44 described above, and
4 is engaged with a return position G that allows 4 to be switched to the above-mentioned protruding operation position C, and the operation tool 44 by engaging with the operation tool 44.
Is configured to be switchable to the retreat operation position D and the advance position H for switching to the retreat operation position D.

The stop means 37 may be provided on the stand 6 or the carriage 3, and correspondingly, the stop release means 39 may be provided on the carriage 3 or the stand 6. is there.

[0008]

In the present invention, for example, FIG. 1 to FIG. 7 or FIG.
And as shown in FIG. 19, it operates as follows. The operation of taking out the stopped mold 13 placed on the stand 6 to the carriage 3 is performed in the following procedure. First, the carriage 3 is moved to the position of the table 6 where the stop release is to be performed, and the output part 53 of the stop release means 39 faces the operation tool 44 of the stop means 37. Then, the output unit 53 is advanced from the return position G to the advance position H. Then, the operation tool 44
Is switched from the projecting operation position C to the retracting operation position D, and at the same time, the stopper tool 42 is switched from the projecting posture A to the retracting posture B. As a result, the received portion 19 of the die 13 is allowed to move toward the carriage 3, and the die 13 can be transferred.

[0009]

The present invention has the following effects because it is configured and operates as described above. According to the present invention, it is possible to release the stop of only a specific table or trolley that is going to release the stop state, and unlike the conventional example, it does not occur that the release of the stop is not necessary even if the stop release is unnecessary. It can be surely prevented from falling.

In the above structure, when the stopper member is supported by the housing so as to be vertically movable and the protruding spring for elastically pressing the stopper member in the protruding posture is provided,
Even when the mold is accidentally collided with the stopper tool from the upper side when the mold is placed on the stand by a crane or the like, the stopper tool is allowed to descend against the protruding spring. Therefore, it is possible to reliably prevent the stop means from being damaged.

[0011]

【Example】

(First Embodiment) FIGS. 1 to 7 show a first embodiment. First, the overall configuration of the mold exchanging system will be described with reference to the plan view of FIG. Two injection molding machines 1a and 1b of different models
Two rails 2 are arranged between the two rails, and a mold replacement cart 3 (hereinafter, simply referred to as a cart) having two mold placement surfaces 4 and 5 on the left and right can run in the left and right directions along the rail 2. It is said that A plurality of mold placement tables 6 are fixed to the front side F of the right end portion of the rail 2. Each mounting table 6 includes two left and right mold mounting surfaces S.S.

For example, a used mold of the injection molding machine 1a
The replacement (not shown here) is done by the following procedure. First, as shown in the alternate long and short dash line diagram, mount the truck 3 on the rail 2
And move it to the position of the rear side R of the stand 6 along the
A new die (not shown here) placed on the die loading surface S on the left side of is conveyed to the die loading surface 4 on the left side of the carriage 3. The trolley | bogie 3 is shown in a solid line diagram, and the injection molding machine 1
The mold is moved to the rear R position of a and the used mold in the injection molding machine 1a is carried into the mold loading surface 5 on the right side. Then
The carriage 3 is moved to the right by a preset distance, and a new mold on the mold loading surface 4 on the left side is carried into the injection molding machine 1a. After that, as shown in the chain double-dashed diagram, the carriage 3 is moved to the position of the rear side R of the mounting table 6, and the right side of the mold loading surface 5
The upper used mold is returned to the loading surface S on the right side of the mounting table 6.

The structures of the carriage 3 and the mold stand 6 will be described with reference to FIGS. 1 and 3 to 7. As shown in FIG. 3 and FIG. 4, the mold loading surface 5 on the right side of the carriage 3 (and the mold loading surface 4 on the left side) is the left side which is juxtaposed in the front-rear direction (the direction of arrow F-R, the same applies hereinafter). It is composed of a long roller group 7 and a right short roller group 8. Further, each mold loading surface S of the mounting table 6 is also composed of a left long roller group 10 and a right short roller group 11 arranged in the front-rear direction. Mold plates 14 and 14 are fixed to both left and right side surfaces of the mold 13, and downward projections thereof are mounted on the mold loading surface S so as to be movable in the front-rear direction.

As shown in FIGS. 3 to 5, an L-shaped bracket 16 is fixed to the rear portion of the mold plate 14 on the right side. The horizontally elongated operated member 17 fixed to the lower portion of the bracket 16 includes a driven portion 18 for pushing and pulling the die, a first received portion 19 for preventing the die retreating, and a first receiving portion 19 for preventing the die advance. 2 to-be-received portion 20. The lower end surface of the operated member 17 is located below the lower surface L of the mold 13 and above the mold mounting surface S.

A guide rail 23 formed by facing two C-shaped rail members 22 in a sectional view is fixed to the upper portion of the carriage 3. This guide rail 23
In addition, a push / pull base 26 that is pushed and pulled by the chain 25
Is movably inserted in the front-rear direction via front and rear rollers 27, 27, and the chain 25 can be driven by a sprocket 28 provided at the upper rear portion of the carriage 3. The sprocket 28 is rotationally driven by a motor (not shown). Further, the rear end portion of the chain 25 can be folded and housed in a housing box 29 in the carriage 3.

The push-quote hook 31 inserted in the storage groove 26a (see FIG. 6) of the push-pull base 26 is supported by a pivot pin 32 so as to be vertically swingable, and a spring 33 causes an upper engaging position X. (Refer to the solid line diagram) Further, a tip-down cam surface 34 and an engagement groove 35 that engages with the driven portion 18 are sequentially formed at the tip of the hook 31.

At the rear end portion of the mounting table 6, there are provided a first stop means 37 for preventing the backward movement of the mold and a second stop means 38 for preventing the forward movement of the mold. At the front end of the trolley 3,
Stop release means 39 is provided facing the first stop means 37. Each of these means 37, 38, 3
As shown mainly in FIG. 1, 9 is configured as follows.

A stopper tool 42 is supported on a housing 41 of the first stop means 37 by a pivot pin 43 so as to be vertically swingable. The stopper 42 has a projecting posture A (see FIG. 1A) projecting above the lower end of the first received portion 19 and a retracting posture B (retracting below the lower end). (See FIG. 1B)).

In the lower portion of the housing 41, a piston-like operation tool 44 is supported movably in the front-rear direction.
The operation tool 44 is connected to the stopper tool 42, and the projection operation position C (see FIG. 1 (A)) for switching the stopper tool 42 to the above-mentioned projection attitude A and the stopper tool 42 are retracted as described above. Entry / exit position D for switching to entry position B
(See FIG. 1B). The operation tool 44 is prevented from protruding from the rear surface of the housing 41 by the stop pin 45.

In the stop state shown in FIG. 1A, the operation flange 46 of the operation tool 44 is elastically pressed by the spring 47 to the projecting operation position C and the stopper tool 42 is operated.
The operated portion 42a is lifted from below. As a result, the stopper portion 42b of the stopper tool 42 swings upward to prevent the operated member 17 from retreating. Contrary to this, in the stop release state shown in FIG. 1B, the operation flange 46 is fitted into the escape groove 48 of the stopper tool 42. As a result, the downward swing of the stopper portion 42b is allowed, and the operated member 17 of the same is allowed to retreat.

The second stop means 38 is fixed to the upper part of the housing 41 by two bolts 49 (see FIG. 7), and is attached to the operated member 17 at the front side F.
Be faced by.

The stop release means 39 comprises a pneumatic cylinder 51. At the front end of the piston rod 52 of the cylinder 51, the output unit 5 facing the operation tool 44 is provided.
3 is provided. The output unit 52 is the operation tool 44 described above.
Return position G (Fig.
(See (A)) and the advance position H (see FIG. 1B) for switching the operating tool 44 to the retreat operation position D described above. Reference numeral 54 is a return detection switch,
Reference numeral 55 is a forward movement detection switch. Further, as shown in FIG. 7, the first supply / discharge port 57 and the second supply / discharge port 58 of the cylinder 51 are selectively connected to the air pressure source 61 via the switching valves 59 and 60, respectively.

A procedure for taking in and out the mold 13 between the carriage 3 and the table 6 will be described. When the mold 13 is stored on the mold loading surface S of the table 6, the second stop means 38 prevents the mold 13 from moving to the front side F. Also,
Compressed air is discharged from the first supply / discharge port 57 of the cylinder 51 and compressed air is supplied to the second supply / discharge port 58. Then, as shown in FIG. 1 (A), the output portion 53 is retracted to the return position G, the operating tool 44 is switched to the projecting operation position C, and the stopper tool 42 is switched to the projecting attitude A. This prevents the operated member 17 from moving to the rear side R. As a result, the mold 13 is accurately positioned at a predetermined position in the front-rear direction. At this point, the push / pull base 26 is retracted to the rear side R portion of the carriage 3.

The operation of moving the mold 13 on the table 6 to the carriage 3 is performed in the following procedure. First, the carriage 3 is moved to the position of the rear side R of the stand 6, and when the stop release means 39 of the carriage 3 reaches the position facing the first stop means 37 of the stand 6, positioning of the carriage 3 is stopped. To do. Next, the compressed air is discharged from the second supply / discharge port 58 of the cylinder 51 and the compressed air is supplied to the first supply / discharge port 57. Then, as shown in FIG. 1B, the output portion 53 is advanced to the advance position H, the operation tool 44 is switched to the retreat operation position D, and the stopper tool 42 is switched to the retreat posture B. This allows the operated member 17 to move to the rear side R.

Then, the sprocket 28 (see FIG. 5).
Is rotated in a counterclockwise direction by a motor (not shown), and the push / pull base 26 on the carriage 3 is advanced to the front side F. With the advance of the push / pull base 26, first, the push / pull hook 31
The cam surface 34 of the hook abuts the lower surface of the driven portion 18 of the plate 14, and then the downward reaction force acting on the cam surface 34 from the driven portion 18 causes the tip portion of the hook 31 to resist the spring 33. Swing downwards. Then, push-pull base 2
When 6 moves forward and the engaging groove 35 of the hook 31 reaches the position of the driven portion 18, the tip end portion of the hook 31 swings upward due to the elastic force of the spring 33, and the engaging groove 35 moves to the driven portion 18. Engage with.

Immediately before the hook 31 advances to the engagement position, the first limit switch 64 shown in FIG. 3 decelerates the motor (not shown) to slow the advance speed of the push / pull base 26. Further, at the time point when the push-pull base 26 is advanced to the engagement position, the second limit switch 65 shown in FIG.
The advance position is detected and the rotation of the motor is stopped.

By moving the push / pull table 26 to the rear side R in the above-mentioned engaged state, the mold 13 on the stand 6 is pulled out to the carriage 3. Then, the compressed air is discharged from the first supply / discharge port 57. Then, the spring 47 of the first stop means 37
Thus, the operating tool 44 is switched to the projecting operation position C, and the stopper tool 42 is switched to the projecting attitude A. At the same time, the piston rod 5 of the stop release means 39
2 is retracted to the position of the chain double-dashed line diagram in FIG. 1 (B). When this is detected by the return detection switch 54, compressed air is supplied to the second supply / discharge port 58, and the piston rod 52
To retreat to the end. Then, the positioning of the carriage 3 is released, and the carriage 3 is moved to the position of the injection molding machine 1a or 1b.

The operation of moving the mold 13 on the carriage 3 to the mounting table 6 is carried out in a procedure almost reverse to the above operation. That is, the stop release means 39 of the carriage 3 is made to face the first stop means 37 of the table 6, and the output portion 53 of the stop release means 39 is advanced to move the first stop means 37 as shown in FIG. 1B. To stop release state. Next, the push / pull table 26 is advanced from the cart 3 side to the table 6 side, and the mold 13 is carried out to the table 6. Continuing, Figure 1
As shown in (A), the stop release means 39 is contracted to switch the first stop means 37 to the stop state. As a result, the mold 13 has two stop means 37.
-38 prevents forward and backward movements, and allows accurate positioning on the stand 6.

In the above state, the pneumatic actuator 68 (see FIG. 5) fixed to the carriage 3 is extended to push the pressing tool 6
At 9, the push pin 70 of the push / pull base 26 is raised. Then,
As shown by the chain double-dashed line in FIG. 5, the tip of the hook 31 swings downward and is switched to the disengagement position Y lower than the lower end surface of the driven part 18. In this state, the sprocket 28 is driven in the clockwise direction. Then, push-pull table 2
6 is pulled to the rear side R by the chain 25, and the engagement between the engagement groove 35 and the driven portion 18 is released. Subsequently, the push / pull base 26 is moved to the rear portion of the carriage 3.

The device having the above-mentioned configuration has the following advantages.
It is possible to release only the specific stand 6 that is going to release the stopped state among the stand 6 arranged in the left-right direction, and unlike the conventional example, even the stand 6 that does not need to be released does not release the stop. Therefore, it is possible to reliably prevent the mold from falling. Since the stopper tool 42 can be switched by gravity and the operation tool 44 can be switched by the spring 47, the structure of the device is simple.

Piston rod 5 of stop releasing means 39
The position G or H of the output unit 53 can be detected by detecting the forward / backward position of 2 with the two detection switches 54 and 55, and thus the posture A or B of the stopper 42 can be detected. As a result, a device for detecting whether the mold 13 is in the stop state or the stop release state can be manufactured at low cost.

Utility equipment such as operating air pipes and electric wiring required for the stop releasing means 39 is provided only on the carriage 3 and need not be provided on each of the plurality of mounts 6. Therefore, it is not necessary to run air piping and electric wiring around the factory, and the entire system can be simply configured, and the facility cost of the utility can be reduced. Further, when adding the table 6, it is only necessary to add the mechanical stop means 37 to the table 6 to be added, and since it is not necessary to add the above-mentioned utility, the additional work is easy and inexpensive. In addition, since the cart 3 can be test-run in the manufacturing factory with the utility equipment installed, it is unnecessary or easy to interlock or adjust with the stand 6 at the installation site.

The first embodiment described above can be modified as follows. The chain 25 only needs to be push-pullable and bendable and can be replaced with a belt or a wire. The driven portion 18, the first received portion 19, and the second received portion 20 may be all formed of different members. The mold loading surface S of the table 6 is
It may be one side or three or more sides.

8 to 19 show the second to ninth embodiments. In each embodiment, the members having the same functions as those in the first embodiment are designated by the same reference numerals in principle.

(Second Embodiment) FIG. 8 shows a second embodiment. An operation projection 73 is projected upward at the right end of the operation tool 44. The block 7 in which the housing 41 is provided with the operation tool 44 at the protruding operation position C and the stopper tool 42 at the retracted posture B.
Accepted at 4.

(Third Embodiment) FIG. 9 shows a third embodiment. The block-shaped housing 41 has the first stop means 3
The left end of the stopper tool 42 of No. 7 is supported by a pivot pin 43 so as to be vertically swingable. The lever-shaped operation tool 44 has an intermediate portion supported by another pivot pin 76, and an operation roller 77 and an operated roller 78 are provided at the upper end. The operation roller 77 is the operated inclined surface 79 of the stopper tool 42.
Be assigned to. The second stop means 38 is formed integrally with the housing 41.

Piston rod 5 of stop releasing means 39
2 is advanced, and the operation unit 44 is operated by the output unit 53.
Is switched from the projecting operation position C in the solid line diagram to the retracting operation position D in the two-dot chain diagram against the tension spring 80, the stopper tool 42 is swung downward from the projecting position A shown in the drawing to the retracting position. The respective positions C and D of the operation tool 44 described above correspond to the cylinder 5
1 is detected by the photoelectric switch 81.

(Fourth Embodiment) FIG. 10 shows a fourth embodiment.
The above FIG. 9 is modified as follows. That is, the operated portion of the stopper tool 42 is constituted by the cam surface 83, and the erection position of the tension spring 80 is changed.

(Fifth Embodiment) FIG. 11 shows a fifth embodiment. The stopper tool 42 is vertically movably inserted into the upper part of the housing 41. When the operation tool 44 is switched from the projecting operation position C shown in the figure to the leftward withdrawal operation position by the output portion 53 of the stop releasing means 39, the stopper tool 4 is
2 is switched by the retracting spring 85 from the projecting posture A shown to the lower retracting posture.

(Sixth Embodiment) FIG. 12 shows a sixth embodiment. A stopper tool 42 is vertically movably inserted into the housing 41 in substantially the same manner as in FIG. When the operating tool 44 is switched from the projecting operation position C shown in the figure to the retracting operation position on the left side by the output section 53 of the stop releasing means 39, the stopper tool 42 resists the projecting spring 87 and moves downward from the projecting attitude A shown in the figure. It is switched to the retracted position on the side. In the sixth embodiment, even if the die accidentally collides with the stopper tool 42 from above, the stopper tool 42 is
Is allowed to descend against the projecting spring 87, so that the first stop means 37 can be prevented from being damaged.

(Seventh Embodiment) FIGS. 13 to 15 show a seventh embodiment. The first stop means 37 comprises a block-shaped housing 41 and a pin 89 which supports a lever 91 so as to be vertically swingable. A stopper tool 42 is provided on the upper end of the lever 91, and an operation tool 44 is provided on the lower part of the lever 91. Reference numeral 92 is a swing restriction pin. The second stop means 38 is formed integrally with the housing 41.

The stop releasing means 39 is the pneumatic cylinder 5
1 is provided. One end of the cylinder 51 has a pivot pin 90.
While being supported by, the tip end portion of the piston rod 52 is connected to the middle portion of the output lever 93. The base end portion of the lever 93 is supported by the pivot pin 94, and the output portion 53 is provided at the tip end portion of the lever 93.

When the cylinder 51 is extended from the contracted state shown in the drawing, the output portion 53 of the output lever 93 moves from the return position G (two-dot chain line in FIG. 15) to the advanced position H (one-dot chain line in FIG. 15). Is switched to. Then, the operation tool 44 is switched from the projecting operation position C (solid line diagram in FIG. 15) to the retracting operation position (dotted line diagram in FIG. 15) against the spring 95, and the stopper tool 42 is projected. (Solid line diagram in FIG. 15)
Is switched to the retreat posture B (one-dot chain line in the figure).

Also in the seventh embodiment, even when the die accidentally collides with the stopper 42 from the upper side,
Since the stopper 42 is allowed to swing downward, it is possible to prevent the first stop means 37 from being damaged.

(Eighth Embodiment) FIGS. 16 and 17 show an eighth embodiment. Shuttle device 99 behind the press machine 101
Are placed. A carriage 103 is mounted on a rail 102 provided on a base 100 of the shuttle device 99 so as to be movable in the left and right directions. Molds 113 are mounted on the left and right mold mounting surfaces 104 and 105 of the carriage 103.
Can be placed, and first stop means 37 are provided at the front ends of the respective placement surfaces 104 and 105. A mold stand 106 is provided between the carriage 103 and the press machine 101. Stop release means 39 is provided at the rear end of the stand 106. The first stop means 37 and the stop release means 39 are constructed in substantially the same manner as in the first embodiment shown in FIG.

The push / pull base 26 can be moved back and forth over the guide rails 123 and 124 provided on the carriage 103 and the mounting base 106, respectively. The hook 31 supported by the push / pull base 26 can be engaged with a driven portion (not shown) of the mold 113 from above. Further, when the present invention is applied to the press machine as described above, the second stop means 3 shown in the first embodiment described above.
8 is omitted.

(Ninth Embodiment) FIGS. 18 and 19 show a ninth embodiment. Reference numeral 3 is a dolly, and reference numeral 6 is a stand.
A stopper tool 42 is supported by a housing 41 of the first stop means 37 so as to be vertically movable between a projecting posture A and a retracting posture B. The stopper 42 is elastically pressed by the projecting spring 87 to the projecting posture A. The operation tool 44 is J
It is formed in a letter shape. The upper right part of the operation tool 42 is a pin
The roller 131 supported by the housing 41 so as to be vertically swingable and provided on the lower left part of the operation tool 44 faces the output portion 53 of the stop release means 39, and the upper part of the operation tool 44 is the same. Ball joint 132 protruding leftward from
Is connected to the stopper tool 42.

In the stop state shown by the solid line in FIG. 18, since the output portion 53 of the stop releasing means 39 is switched to the return position G, the stopper tool 42 is switched to the projecting posture A by the spring 87 and the operating tool is operated. 44 is switched to the projecting operation position C. As shown by the two-dot chain line in the figure, when the output section 53 is switched to the advance position H when the stop is released, the operating tool 44 is swung downward and switched to the retreat operation position D, whereby Stopper tool 42
Is switched to the retracted posture B.

A second stop means 38 is provided at a position opposite to the stopper tool 42 with respect to the received portion 19 of the die 13. The second stop means 38 is supported by a groove 134 of the housing 41 so as to be vertically swingable by a pin 134 in a state of being capable of projecting above the lower end of the received portion 19 by its own weight or a spring.

Further, means for detecting that the mold 13 is placed on the stand 6 is provided. This detection means includes a J-shaped arm 136 supported on the housing 41 so as to be vertically swingable by a pin 135, and a proximity switch 137 provided on the carriage 3. When the mold 13 is placed on the stand 6, the arm 136 is swung clockwise as shown in FIG. 18, and the lower left part of the arm 136 faces the proximity switch 137. Since it is possible to detect that the mold 13 is placed on the table 6 based on the detection signal of the switch 137, it is possible to prevent a new mold from being mistakenly sent from the cart 3 to the table 6. When there is no mold on the stand 6, the arm 136 is swung counterclockwise by the spring 138.

An air cylinder 140 is provided on the upper part of the carriage 3 as a mold drop prevention device on the carriage side.
The piston rod 141 of the cylinder 140 is capable of projecting above the die loading surface S.

In the ninth embodiment, even when the mold 13 is accidentally collided from the upper side with the stopper tool 42 when the mold 13 is placed on the stand 6 by a crane or the like,
Since the stopper 42 is allowed to descend against the protruding spring 87, it is possible to prevent the first stop means 37 from being damaged. Further, even when the die accidentally collides with the second stop means 38 from the upper side, the second stop means 38 is swung downward and is not damaged. further,
Since it is possible to detect whether or not there is a mold on the table 6 by the proximity switch 137 provided on the cart 3, it is not necessary to provide electrical wiring on the table 6.

In each of the above-mentioned embodiments, the stop release means 39 may be an electric actuator such as a solenoid or a motor instead of the pneumatic cylinder.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a mold fall prevention device, (A)
The figure shows the stop state in the cross-sectional view taken along the line I-I of FIG.
FIG. 6B is a diagram showing a stop release state.

FIG. 2 is a plan view of a mold exchanging system using the above fall prevention device.

FIG. 3 is a plan view of an essential part of the fall prevention device.

FIG. 4 is a view taken along the line IV-IV of FIG.

5 is a view taken along the line VV of FIG.

6 is a view taken along the line VI-VI of FIG.

FIG. 7 is a plan view of FIG.

FIG. 8 shows a second embodiment and is a diagram corresponding to FIG.

FIG. 9 shows a third embodiment and is a diagram corresponding to FIG.

FIG. 10 shows a fourth embodiment and is a diagram corresponding to FIG.

FIG. 11 shows a fifth embodiment and is a view corresponding to FIG.

FIG. 12 shows a sixth embodiment and is a view corresponding to FIG.

FIG. 13 shows a seventh embodiment and is a diagram corresponding to FIG.

14 is a sectional view taken along the line XIV-XIV of FIG.

15 is a view taken along the line XV-XV in FIG.

16 is a diagram corresponding to FIG. 2 and showing an eighth embodiment.

17 is a view taken along line XVII-XVII in FIG.

FIG. 18 is a longitudinal sectional view showing a ninth embodiment and corresponding to FIG. 1 (A).

FIG. 19 is a plan view showing a ninth embodiment of the above and corresponding to FIG. 7 described above.

FIG. 20 is an elevational view showing a conventional example.

21 is a view taken along line XXI-XXI of FIG.

[Explanation of symbols]

3.103 ... Mold exchange cart, 6.106 ... Mold stand, 13 ... Mold, 19 ... Received part, 37 ... Stop means (first stop means), 38 ... Other stop means (second stop) Means), 39 ... stop releasing means, 41 ... housing, 4
2 ... Stopper tool, 44 ... Operating tool, 53 ... Output section, 87
... projecting spring, A ... projecting posture, B ... retracting posture, C ... projecting operating position, D ... retracting operating position, G ... returning position, H ... advancing position.

Claims (7)

[Claims] 1. A stop means (37) is provided at one end of two ends of a mold stand (6) and a mold exchanging carriage (3) facing each other, and the stop is released at the other end. A means (39) is provided, and a stopper tool (42) and an operation tool (44) are provided in the housing (41) of the stop means (37), and the stopper tool (42) is attached to the mold (13). Received part
(19) is supported by the housing (41) so as to be switchable between a projecting posture (A) projecting upward from the lower end and a retracting posture (B) retracting downward from the lower end, and The operating tool (44) is connected to the stopper tool (42), and the stopper tool (42) is connected to the projecting posture (A).
Same as projecting operation position (C) to switch to stopper tool (42)
Is configured to be switchable to the retreat operation position (D) for switching to the retreat posture (B), and the stop release means (39) is provided between the other end and the one end. An output part (53) for advancing and retreating is provided, and the output part (53) is disengaged from the operating tool (44) so that the operating tool (44) moves to the projecting operation position (C). Return position (G) that allows switching to the
(4) A mold drop prevention device characterized in that it can be switched to an advance position (H) where it is engaged with (44) to switch the operation tool (44) to the retreat operation position (D). . 2. The mold drop prevention device according to claim 1, wherein the output part (53) is linearly movable between the other end and the one end. What I did. 3. The mold drop prevention device according to claim 1, wherein the stopper tool (42) is supported by the housing (41) so as to be vertically movable, and the stopper tool (42) is provided with the stopper member (42). A spring provided with a protruding spring (87) that elastically presses the protruding posture (A). 4. The mold drop prevention device according to claim 3, wherein the operation tool (44) is formed so as to extend in the vertical direction, and an upper portion of the operation tool (44) swings up and down on the housing (41). The operation tool (44) is movably supported, the lower part of the operation tool (44) faces the output section (53), and the intermediate part of the operation tool (44) in the vertical direction is used as the stopper tool (42). Connected. 5. The mold drop prevention device according to claim 1, wherein the stopper tool (42) is provided for the received receiving portion (19) of the mold (13). Another stop means in the opposite position
(38) is provided, and another stop means (38) is supported on the housing (41) so as to be vertically swingable in a state in which the stop means (38) can project upward from the lower end of the received portion (19). . 6. The mold fall prevention device according to claim 1, wherein the stop means (37) is provided on the mold stand (6) and the stop release means (37) is provided. 39) is provided on the above-mentioned mold exchanging cart (3). 7. The mold drop prevention device according to claim 1, wherein the stop means (37) is provided on the mold exchange carriage (103), and the stop release means is provided. (39) is provided on the mold stand (106).