JPH0255212B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an exchange mold conveying device for an injection molding machine or the like.

[Technical background of the invention and its problems]

BACKGROUND ART Conventionally, in injection molding machines and the like, it has been necessary to efficiently exchange molds in a short time, and for this reason, a trolley for loading and unloading molds has often been used as a mold changing device.

Some of these types of carts run on tracks, others run off the tracks, and some are fixed types that do not run, but recently, in order to further shorten the mold change time, There are many models that have two stations for loading and unloading.

Each of these stations is equipped with a drive device for carrying the mold out of or into the injection molding machine.

By the way, this drive device has a so-called snake chain method in which the chain is moved forward and backward within the guide groove, and the hook attached to the tip of the chain engages with the mold to carry in and out of the mold. ing. Another method is, for example,
As seen in No. 48535 and Japanese Unexamined Patent Publication No. 54-37060, the conveyor rollers are driven and rotated in the forward and reverse directions to enable loading and unloading.
Some movable platens are equipped with similarly driven rollers for carrying in and out of molds.

Regarding the receiving guide roller or drive roller part in the molding machine and the transfer roller to the cart, it is possible to extend the receiving guide part on the molding machine side, or extend a bracket with rollers from the cart side, or to install a roller that is independent from both. By providing a stand with rollers, etc., the molds can be completely transferred.

As mentioned above, conventional devices require a device to drive the rollers, but by using a snake chain method guided by grooves, the mold can be moved perpendicularly to the mold opening/closing direction of the molding machine. They were carrying in and out.

In other words, to explain these conventional mold changing operations in more detail, first, the mold to be used for the next molding is lifted from the mold storage by a crane, and then transferred to a trolley near the molding machine. Alternatively, move the trolley to the mold storage, transfer it onto the trolley there, transport the trolley to the molding machine, park it at the mold unloading position currently in use for the molding machine, and place it on the empty station side on the trolley. Remove the mold from the molding machine.

The mold is replaced by carrying the mold loaded on the cart into the molding machine to be used for the next molding.

However, in terms of factory layout, it would be ideal if molding machines could be installed on both sides of the trolley in terms of effective use of space. A trolley is required, and if the drive roller method is used, it is possible to carry molds into and out of the molding machine on either the left or right side of the trolley, but a roller drive device must be installed on the molding machine side. Both become expensive in terms of cost.

Furthermore, in a small molding machine, it is extremely difficult in terms of space and impractical to provide the above-mentioned drive device inside the molding machine.

[Purpose of the invention]

In view of this, the present invention provides a replacement mold conveying device for an injection molding machine or the like which is inexpensive in terms of cost and can carry molds into and out of molding machines on either the left or right side of a trolley. This was done with the aim of eliminating shortcomings.

[Summary of the invention]

In order to achieve the above object, in the present invention, in an exchange mold conveying device such as an injection molding machine, a transmission wheel driven by a motor etc. in the machine frame is fixed to one side of the machine frame of the machine body. a first shaft rotatably provided, the other end of the first shaft being fixed to one end of a first link, and one side of a second shaft rotatably fitted to the other end of the first link; The other side of the second shaft is rotatably fitted to one end of the second link, one side of the third shaft is rotatably fitted to the other end of the second link, and the other side of the third shaft is rotatably fitted to one end of the second link. The machine is characterized in that an engaging member for engaging with the die to be replaced is installed, and the engaging member is moved in the horizontal direction by a guide member provided on the machine frame. .

[Embodiments of the invention]

The present invention will be described below with reference to embodiments shown in FIGS. 1 to 7.

The exchange mold conveying device for an injection molding machine or the like according to the present invention has a machine frame 2 of a device main body 1, and a transmission wheel 4 such as a sprocket driven by a motor 3 etc. is fixed to one side. one shaft 5, a first link 6 having the other side 5a of the first shaft 5 fixed to one end, and a second shaft 7 having one side rotatably fitted to the other end of the first link 6.
, a second link 8 rotatably fitted to one end of the other side of the second shaft 7; one side rotatably fitted to the other end of the second link 8, and an engagement member 10 on the other side. It is comprised of a third shaft 9 to which the engaging member 10 is fixed, and a guide member 11 provided on the machine frame 2 to move the engaging member 10 in the horizontal direction.

In this embodiment, the device main body 1 has a cart 14 having four wheels 13 for running on rails 12, as shown in FIGS. 2 and 3.
It is formed longer in the longitudinal direction than in the width direction, and is shown placed next to a molding machine on the left side (not shown).

The machine frame 2 is provided on the truck 14, and on the upper surface of the machine frame 2, a first roller 15 and a second roller 16, which are rotatable about a shaft extending in the longitudinal direction, are provided.
are arranged in pairs at predetermined intervals.

and the first roller 15 (lower side in FIG. 1)
is long, and the second roller 16 (upper side in FIG. 1) is short, but the first roller 15 and the second roller 1
The cores of No. 6 are arranged on the same axis.

Further, a space 17 having a predetermined width l is formed between the first roller 15 and the second roller 16.

The width l of this space 17 is the width l of the first roller 15.
The width is such that even if a mold to be replaced is placed on the second roller 16, it will not fall into the mold.

The motor 3 is installed at an intermediate height position of the machine frame 2.
A chain wheel 18 is directly connected to three shafts of the motor.

Further, the motor 3 is located in the machine frame 2 of the space 17.
The first shaft 5 is rotatably supported by a bearing 19 at a higher position, and the transmission wheel 4 having a larger diameter than the chain wheel 18 is fixed to one side of the first shaft 5. And this transmission wheel 4 is
It is provided in the space 17 in close proximity to the first roller 15, and its outer diameter portion is located at a lower position than the first roller 15, so that it does not interfere with the movement of the object placed on the roller. There is.

When the motor 3 is driven, the chain wheel 1
The transmission wheel 4 is rotated from 8 through the chain 20, and the first shaft 5 is rotated.

The other side 5a of the first shaft 5 is fixed to one end of a first link 6 of an appropriate length, and a bearing 21 provided at the other end of the first link 6 is attached to one side of the second shaft 7. 7a is rotatably fitted.

The other side of the second shaft 7 is rotatably fitted to a bearing 22 provided at one end of the second link 8, and the third One side of the shaft 9 is rotatably fitted. The engagement member 10 is fixed to the other side of the third shaft 9 to engage with and fix the die to be replaced.

This engagement member 10 is an actuator 10a.
It is composed of a pin 10b that can be freely moved in and out by the operation of this actuator 10a.

The pin hole 25 of the connecting piece 25 is attached to the mold 24 so as to have a lower surface slightly lower than the mold.
a, actuate the actuator 10a to release the pin 10.
By inserting b from below, it engages with the mold 24.

Further, a protrusion 26 is provided on the side of the engaging member 10, and the protrusion 26 is inserted into the groove 11a of the guide member 11 provided in the horizontal direction on the side of the machine frame 2 on which the second roller 16 is placed. The grooves 11a are fitted in such a way that they can be moved at all times within the groove 11a.

Therefore, when the engaging member 10 engages with the mold and moves the mold from the apparatus main body 1 to the molding machine or from the molding machine to the apparatus main body 1, the protrusion 26 is inserted into the guide plate 11. It will move horizontally within the groove 11a.

This movement is caused by the rotation of the first link 6 and the rotation of the first link 6.
This is done by the reciprocating movement of the link 7.

The molding machine is provided with an overhang 27 at the same height as the apparatus main body 1, and has a first roller 15, a second roller 16, and a space 1 similar to the apparatus main body 1.
The guide member 11 with which the protrusion 26 of the engaging member 10 according to the present invention engages is also provided with a width l of 7.
It is provided similarly to the main body 1.

Next, the effect will be explained.

First, the cart 14 of the exchange mold conveying device according to the present invention is mounted next to the molding machine, and the guide members 11 of the projecting part 27 of the molding machine and the main body 1 of the machine are aligned with each other.

Next, the mold 24 taken out from inside the molding machine is transferred to the first roller 15 and second roller 1 of the overhanging portion 27.
6, and in this state, attach the connecting piece 25 to the lower part of the mold 24.

At the same time, the motor 3 in the device main body 1 is driven, and the transmission wheel 4 is driven from the directly connected chain wheel 18 via the chain 20.

As a result, the first link 6 fixed coaxially with the transmission wheel 4 is rotated, and the second link 8 is connected to the connecting piece 2.
5, the protrusion 26 of the engaging member 10 fixed to the third shaft 9 moves into the groove 1 of the guide member 11.
1a, and when the engaging member 10 reaches the lower part of the pin hole 25a of the connecting piece 25, the actuator 10a is actuated to raise the pin 10b, thereby causing the connecting piece 25 and the engaging member 10 to engage with each other. Together, they become one.

In this state, when the first link 6 is reversed and retreated, the second link 8 is moved back so as to be bent with the first link 6 at the second shaft 7, and the engagement member 10 is moved back to the guide member 11. It slides inside and moves inside the space 17 toward the center.

Therefore, the mold 24 moves from the first roller 15 and second roller 16 of the overhanging portion 27 onto the first roller 15 and second roller 16 of the apparatus main body 1,
Depending on the movement of the first link 6 and the second link 8, the conveyance speed can be as high as 10 m/min to a predetermined position.

Similarly, if there is a mold to be used next in the apparatus main body 1, the mold can be fed to the molding machine by moving it from the main body 1 in the reverse operation to the above.

Although the above explanation has been made with the molding machine located on the left side in FIG. 1, the molds can be replaced in the same manner when the molding machine is located on the right side or both the left and right sides.

However, if the first shaft 5 is located on both the left and right sides, it is necessary to make the first shaft 5 symmetrical with respect to the longitudinal center of the trolley 14.

In addition, in this embodiment, the engagement member and the connecting piece attached to the mold are engaged by the pin 10b and the pin hole 11a.
As explained in the case of , forming a jaw part on the connecting piece,
A hook that engages with this jaw may be provided on the third shaft 9 side, and an actuator may be provided for releasing the engagement between the hook and the mold jaw from the molding machine side.

Further, as another embodiment in which the engaging member 10 is guided in the horizontal direction of the machine frame 2, as shown in FIG. On the other hand, a second member 29 which is long in the horizontal direction and has upper and lower grooves 29a, 29a of appropriate depth in its cross section is fixed to the machine frame 2, and the second member 29 is fixed to the machine frame 2. The projections 30, 30 provided on the upper and lower sides of the 1 member 28 are connected to the 29
A, 29a may be attached so as to fit therein.

Furthermore, the relationship between the lengths of the first link 6 and the second link 8 is such that the movement of the first link 6 is caused by the movement of the second link 8.
It is desirable to set the ratio to be 1:1 so that the two speeds are synchronized at the same speed.

〔Effect of the invention〕

As explained above, the present invention provides an exchangeable mold conveyance device for an injection molding machine, etc., in which a first link driven by a motor or the like is provided on the machine frame of the conveyance device body, and a first link and a second link are provided. The mold forming machine is constructed by rotating the links relative to each other, and providing an engaging member that engages with the mold on the third shaft at the tip of the second link, and further providing a guide member that moves the member horizontally. Because it is easy to carry in and out of the molding machine, it is also possible to carry in and out of the left and right molding machines, and the above link mechanism allows the conveyance speed to be increased to 10 m/min.
Not only can it be done as quickly as min, it can reliably decelerate at the loading and unloading limits, but also the time required to change molds can be shortened and done safely, and the structure is simple. Therefore, it has the advantage of being available at low cost.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an exchange mold conveying device such as an injection molding machine according to the present invention, FIG. 2 is a front view of FIG. 1,
3 is a side view of FIG. 1, FIG. 4 is a front view showing essential parts of the present invention, FIG. 5 is an enlarged front view of FIG. 4, FIG. 6 is a side view of FIG. 4, and FIG. The figure is a side view showing another embodiment showing the relationship between the engaging part and the guide part of the present invention. 1... Device body, 2... Machine frame, 3... Motor, 4... Transmission wheel, 5... First shaft, 6... First link, 7... Second
Shaft, 8... Second link, 9... Third shaft, 10... Engaging member, 11... Guide member, 28... First member, 29... Second member, 30... Protruding piece.

Claims (1)

[Claims] 1. In the replacement mold conveyance device of an injection molding machine, etc.
A first shaft having a transmission wheel fixed to one side, which is driven by a motor or the like in the machine frame, is rotatably provided in the machine frame of the device main body, and the other end of the first shaft is connected to the first link. one end of the first link, one side of the second shaft is rotatably fitted to the other end of the first link, and the other side of the second shaft is fixed to the other end of the first link.
One end of the link is rotatably fitted, one side of a third shaft is rotatably fitted to the other end of the second link, and the other side of the third shaft is fitted with a shaft for engagement with a mold to be replaced. An exchange mold conveying device for an injection molding machine or the like, characterized in that a mating member is installed and the mating member is moved horizontally by a guide member provided on the machine frame.