JPH0255211B2 - - 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, molds have been replaced efficiently in a short period of time, and for this reason, a trolley for carrying in and out of molds is often used as a mold changing device.

Some of these trolleys run on tracks, some run off 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 on a trolley.

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 roller is driven and can be rotated forward and backward to carry in and out, and the fixed platen and movable platen in the molding machine are also driven in the same way. Some machines are equipped with rollers to transport molds in and out.

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. The mold is completely transferred by providing a stand with rollers.

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 remove the empty space on the trolley. Transport the mold inside the molding machine to the station side.

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 to install molding machines on both sides of the trolley in terms of effective use of space, but if this was done using a chain pulling method, it would be ideal to install molding machines on both sides of the trolley. 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 to provide the above-mentioned drive device in the molding machine in terms of space and is impractical.

[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, the present invention provides an exchange mold conveying device such as an injection molding machine, in which a transmission wheel driven by a motor or the like in the machine frame is installed in the machine frame of the machine body. A first shaft is movably fixed to one side, the other side of the first shaft is fixed to one end of a first link, and the other end of the first link has a rotatable middle part of the second shaft. one side of the second shaft is rotatably fitted to one end of the second link, and an intermediate portion of the third shaft is rotatably fitted to the other end of the second link. An engaging member for the mold to be replaced is fixed to one side of the third shaft, and a part is secured between the supporting portion of the first shaft and the other side of the second shaft in the machine frame. , and said second
It is characterized in that rotation regulating means for the second and third shafts are provided between the other end of the first link facing the link and the other side of the third shaft, respectively.

[Embodiments of the invention]

The present invention will be described below with reference to embodiments shown in FIGS. 1 to 9.

The exchange mold conveying device for an injection molding machine or the like according to the present invention has a first transmission wheel 4 such as a sprocket driven by a motor 3 or the like fixed to one side of the machine frame 2 of the device main body 1. A 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 an intermediate portion rotatably fitted to the other end of the first link 6.
A second link 8 is rotatably fitted to one end of one side of the second shaft 7, and an intermediate portion is rotatably fitted to the other end of the second link 8 and is engaged with the one side. It is composed of a third shaft 9 to which a mating member 10 is fixed, rotation regulating means 11 and 12 for the second shaft 7 and third shaft 9, and the like.

As shown in FIGS. 2 and 3 in this embodiment, the device main body 1 has a trolley 15 with four wheels 14 for running on rails 13,
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 15, and on the upper surface of the machine frame 2, a first roller 16 and a second roller 17, which are rotatable about a shaft extending in the longitudinal direction, are provided.
are arranged in pairs at predetermined intervals.

and the first roller 16 (lower side in FIG. 1)
is long, and the second roller 17 (upper side in FIG. 1) is short, but the first roller 16 and the second roller 1
The cores of No. 7 are arranged on the same axis.

Further, a space 18 having a predetermined width l is formed between the first roller 16 and the second roller 17.

The width l of this space 18 is the width l of the first roller 16.
The width is such that even if a die to be replaced is placed on the second roller 17, it will not fall into it.

The motor 3 is installed at an intermediate height position of the machine frame 2.
A chain wheel 19 is directly connected to the shaft of the motor 3.

Further, the motor 3 is located in the machine frame 2 of the space 18.
The first shaft 5 is rotatably supported by a bearing 20 at a higher position, and on one side of the first shaft 5,
The transmission wheel 4 having a larger diameter than the chain wheel 19 is fixed. The transmission wheel 4 is close to the first roller 16 within the space 18,
The outer diameter portion is provided at a position lower than the first roller 16, so that it does not interfere with the movement of objects placed on the roller.

When the motor 3 is driven, the chain wheel 1
The transmission wheel 4 is rotated from 9 through the chain 21, 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 having an appropriate length, and a bearing 22 provided at the other end of the first link 6 has an intermediate portion of the second shaft 7. 7a is rotatably fitted.

Further, one side of the second shaft 7 is rotatably fitted into a bearing 23 provided at one end of the second link 8, and a bearing 24 provided at the other end of the second link 8 is rotatably fitted to a bearing 23 provided at one end of the second link 8. The middle portions of the three shafts 9 are 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 26 of the connecting piece 26 is attached to the mold 25 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 25.

The rotation regulating means 11 of the second shaft 8 is fixedly installed in the support portion of the first shaft 5 in the machine frame 2.
a first sprocket 27 concentric with the second shaft 7;
a second sprocket 28 provided at the other end;
It is composed of a chain 29 wound around this.

Therefore, when the first link 6 rotates around the first shaft 5 due to the rotation of the first shaft 5, the second sprocket 28 moves in sync with the rotation of the first link 6. Since the first sprocket 27 is fixed, the meshing position of the chain 29 and the first sprocket 27 only moves by the amount of rotation, and the second shaft 7
The rotation range of is restricted.

The rotation regulating means 12 of the third shaft 9
provided on the first link 6 facing the link 8;
a third sprocket 30 concentric with the shaft 7;
It is composed of a fourth sprocket 31 provided on the other side of the shaft 9, a chain 32 wound around the fourth sprocket 31, and the like, and the third shaft 9
The rotation range of is restricted.

The chains 29 and 32 are provided with adjustment devices 33 and 34 that are pivotally supported at intermediate portions of the first link 6 and the second link 8, respectively, for tension adjustment.

The molding machine is also provided with an overhang 35 at the same height as the apparatus main body 1, and the first roller 16, second roller 17, and space 18 have the same width l as the apparatus main body 1. There is.

Next, the effect will be explained.

First, the trolley 15 of the exchange mold conveying device according to the present invention is mounted next to the molding machine, and the overhang 35 of the molding machine and the main body 1 of the machine are aligned.

Next, the mold 25 taken out from inside the molding machine is transferred to the first roller 16 and the second roller 1 of the overhanging portion 35.
7, and in this state, attach the connecting piece 26 to the lower part of the mold 25.

At the same time, the motor 3 in the device body 1 is driven, and the transmission wheel 4 is driven from the directly connected chain wheel 19 via the chain 21.

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.
6 , the first link 6 and the second link 8 expand while their rotation is restricted by the second shaft 7 and the third shaft 9 , and the engaging member 10 moves toward the connecting piece 26 . When the lower pin hole 26a is reached, the actuator 10a is actuated to remove the pin 10b.
, thereby causing the connecting piece 26 and the engaging member 1 to
0 and become one body.

When the first link 6 is reversed and retreated from this state, the second link 8 is moved backwards.
It bends back from the first link 6 at the axis 7,
The engagement member 10 moves within the space 18 toward the center as the first link 6 and the second link 8 move.

Therefore, the mold 25 moves from the first roller 16 and second roller 17 of the overhang 35 onto the first roller 16 and second roller 17 of the apparatus main body 1, and the first link 6 and the second link The mold is transported to a predetermined position according to the movement of step 8 at a speed of 10 m/min.
can be moved quickly.

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.

The above explanation is based on the case where the molding machine is on the left side in FIG. 1, but the mold can be replaced in the same way when the molding machine is on the right side or on 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 15.

Although the engagement between the engaging member and the connecting piece attached to the mold is explained using the pin 10b and the pin hole 26a in this embodiment, a jaw is formed on the connecting piece. A hook that engages with the mold jaw may be provided on the third shaft 9 side, and an actuator may be provided from the molding machine side to release the engagement between the hook and the mold jaw.

In addition, the case where a sprocket and a chain are used as the rotation regulating means 11 and 12 of the second shaft 7 and the third shaft 9 has been described, but in this case, the ratio of the number of teeth between the first sprocket 27 and the second sprocket 28 is 2: 1. 3rd
The ratio of the number of teeth between the sprocket 30 and the fourth sprocket 31 is preferably 1:2.

In addition to the sprocket and chain, the rotation regulating means may be a pulley, a belt, or a wire, or may be of a gear type as shown in FIGS. 7 to 9 as another embodiment.

Components that are common to the present embodiment described above will be described using the same reference numerals.

That is, a transmission wheel 4 is fixed to one side of a first shaft 5 whose intermediate portion 5b is rotatably supported via a bearing 20 on the machine frame 2, and a transmission wheel 4 of an appropriate length is attached to the other side 5a. It is fixed to one end of the first link 36.

Bearing 2 provided at the center of the first link 36
2, an intermediate portion 37a of the second shaft 37 is rotatably fitted.

Further, one side of the second shaft 37 is connected to the second link 38.
The third shaft 41 is rotatably fitted into a bearing 39 provided at one end thereof, and an intermediate portion of the third shaft 41 is rotatably fitted into a bearing 40 provided at the other end of the second link 38. There is.

The engagement member 10 is fixed to the other side of the third shaft 41 to engage with and fix the die to be replaced.

Here, the rotation restricting means 42 of the second shaft 37 is fixedly installed in the support portion of the first shaft 5 in the machine frame 2, and is connected to a first gear 44 concentric with the first shaft 5 and a second shaft. 37
Between it and the second gear 45 provided at the other end,
A plurality of gears 46, 46, . . . of the same size and meshing with each other are provided.
Each of the axes 47, 47, . . . 6, 46, . . .
It is fixed to the link 36 in a cantilever manner, and each shaft 4
7, 47, . . . and the gears 46, 46, . . . are rotatably mounted via bearings 48, 48, .

Therefore, when the first link 36 swings due to the rotation of the first shaft 5, the second link 36, which is integral with the second shaft 37,
The gear 45 rotates to rotate each gear 46, 46, . . . , but since the first gear 44 is fixed, the rotation range of the second gear 45 is ultimately limited, and Rotation of the shaft 37 is restricted.

The rotation regulating means 43 of the third shaft 41 is provided on the first link 36 facing the second link 38, and includes a third gear 49 concentric with the second shaft 37, and a third gear 49 concentric with the second shaft 37.
Between the fourth gear 50 provided on the other side of the shaft 41, a plurality of gears 51, 51, .
Each shaft 52, 52, ... of 51, ... is fixed to the second link 38 in a cantilever manner, and each shaft 52,
52, . . . and the gears 51, 51, . . . are rotatably mounted via bearings 53, 53, .

Therefore, the rotation range of the third shaft 41 is restricted by the rotation restriction means 43, as in the case of the second shaft 37.

The operation of replacing the mold according to the other embodiments shown in FIGS. 7 to 9 is completely the same as that of the present embodiment described above.

〔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. a rotation regulating means for rotating the links relative to each other, providing an engaging member for engaging with the mold on a third shaft at the tip of the second link, and further regulating rotation of the second shaft and the third shaft; are provided between the first and second axes and between the second and third axes, making it easy to carry the mold into and out of the molding machine. It is now possible to carry the molding machine in and out of the left and right molding machines, and the above-mentioned link mechanism allows the conveyance speed to be as fast as 10 m/min, as well as ensure reliable deceleration at the loading and unloading limits. The time required for replacement is short and can be done safely.
Furthermore, since the structure is simple, it has the advantage of being able to be provided at low cost.

[Brief explanation of drawings]

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, and FIG. 6 is a partially cutaway plan view of FIG. 5. Figure 7 is a front view of another embodiment, Figure 8 is a cutaway plan view of Figure 7,
FIG. 9 is a cutaway side view of FIG. 7. 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, 12... Rotation regulating means, 25... Mold, 3
6...first link, 37...second shaft, 38...second link, 41...third shaft, 42, 43...rotation regulating means.

Claims (1)

[Claims] 1. In the replacement mold conveyance device of an injection molding machine, etc.
A first shaft is rotatably provided in the machine frame of the device main body, and a transmission wheel driven by a motor or the like in the machine frame is fixed on one side, and the other side of the first shaft is connected to a first link. fixed to one end, an intermediate portion of a second shaft is rotatably fitted to the other end of the first link, and one side of the second shaft is rotatably fitted to one end of the second link. An intermediate portion of a third shaft is rotatably fitted to the other end of the second link, and an engaging member for a mold to be replaced is fixed to one side of the third shaft. Between the part of the machine frame that supports the first shaft and the other side of the second shaft, and between the other end of the first link facing the second ring and the other side of the third shaft. 2nd and 3rd respectively
A replacement mold conveying device for an injection molding machine, etc., characterized by being provided with a shaft rotation regulating means.