JPH0331541Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a mold conveying device for an injection molding machine or the like.

[Technical background of the invention and its problems] Conventionally, in injection molding machines, etc., it has been necessary to exchange molds efficiently in a short time, and for this reason, a trolley for loading and unloading molds is often used as a mold changing device. It is used.

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 also equipped with similarly driven rollers for carrying in and out of metal fittings.

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 mold conveying devices require a device to drive the rollers, but by using a snake chain system guided by grooves, etc. Molds were being brought in and taken out.

In other words, to explain these conventional mold exchange operations in more detail, first, the mold to be used for the next molding is lifted by a crane from the mold storage and transferred to a trolley near the molding machine. Alternatively, the trolley is carried to the molding machine, stopped at the mold unloading position currently in use with respect to the molding machine, and the mold in the molding machine is transported to the empty station on the trolley.

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 invention]

In view of this, the present invention is an inexpensive mold transport device for injection molding machines, etc., which allows molds to be carried in and out of molding machines on either the left or right side of the trolley, and the width of the trolley is minimized. This was done with the aim of solving the drawbacks of the prior art.

[Summary of the invention] In order to achieve the above object, the present invention provides a first screw that screws together a push-pull tool body provided with a push-pull tool that engages with a mold in a mold conveyance device such as an injection molding machine. The shaft and a second threaded shaft parallel to the first threaded shaft and threaded into a threaded part fixed to the machine frame side of the device main body of the mold conveying device are both rotated by supporting means at both ends. A rotation transmitting member is fixed to the same end of the first screw shaft and the second screw shaft, and a rotation transmitting member is attached to the rotation transmitting member at the same time. A pusher equipped with a rotational drive means having an intermediate rotation transmission member capable of imparting rotation, and a single drive source coupled to the intermediate rotation transmission member to simultaneously impart rotation to the first and second screw shafts. The present invention is characterized in that a pulling device is provided, and the pushing and pulling device is movable relative to the machine frame by the guide member.

[Example of idea]

Hereinafter, the present invention will be explained with reference to the embodiments shown in FIGS. 1 to 6.

The mold conveyance device for an injection molding machine or the like according to the present invention is composed of a guide member 3 provided on a machine frame 2 of the device main body 1, and a push/pull device 4 movable in the horizontal direction by the guide member 3. be done.

This push/pull device 4 rotatably supports a first screw shaft 6 on which the push/pull tool main body 5 is movably fitted and a second screw shaft 7 parallel to the first screw shaft 6 at both ends. a supporting means 8 consisting of vertical members 8a, 8a and a horizontal member 8b connecting these members 8a, 8a, and the first threaded shaft 6 and the second threaded shaft 7 on one side of the vertical member 8a of the supporting means 8. A gear 11 is provided as an intermediate transmission member that meshes with the gears 9 and 10 of the rotation transmission member, which are respectively fixed by protruding, and can simultaneously impart rotation, and a rotation drive means such as a motor 12 coupled to the shaft of this gear 11 It is made up of.

The machine frame 2 of the device main body 1 has two upper frames 3.
a, 3a, one lower frame 3b, and vertical frames 3c, 3c connecting these at their ends. A block-shaped threaded portion 13 is fixed at a predetermined position in the middle, which limits the horizontal movement of the push/pull device 4.

A side wall between the upper frames 3a, 3a of the guide member 3 is formed into a rail 14, and a fourth
As shown in FIG. 5 and FIG. 5, the recesses 8c, 8c on both sides provided at the lower part of the horizontal member 8b and the middle part of the vertical member 8a of the support means 8 fit together, making it possible to slide in the longitudinal direction. ing.

The upper part of the horizontal member 8b of the support means 8 is formed into a bifurcated section 8d, and the hanging portion 5a formed on the push/pull tool main body 5 fits between the bifurcated portions 8d and extends over the horizontal member 8b. It is designed to slide.

The push/pull tool main body 5 has a pin 15 on the top surface.
A push/pull tool 5b that can be raised and lowered is provided.
The tip of this push/pull tool 5b can be engaged with and disengaged from a connecting piece 17 provided on the mold 16.

A ball screw 6a is provided on the first screw shaft 6, and the push/pull tool main body 5 is externally fitted onto the ball screw 6a.

Both ends of the first screw shaft 6 are supported by bearings 18, 18 provided on the vertical members 8a, 8a of the support means 8.
It is rotatably supported by.

The second screw shaft 7 is provided parallel to the lower side of the first screw shaft 6, and has a ball screw 7a formed thereon similarly to the first screw shaft 6, and the length of the screw portion is the same as that of the first screw shaft 6. They are the same length.

Both ends of the second screw shaft 7 are also rotatably supported by bearings 18, 18 provided on the vertical members 8a, 8a of the support means 8, just like the first screw shaft 6.

The ends of the first screw shaft 6 and the second screw shaft 7 on the side opposite to the molding machine project outward from the vertical member 8a, and gears 9, 10 are attached to the projecting portions.
are fixedly installed, respectively, and gears 9 and 10 have the same diameter.

Further, the vertical member 8a on the side of the gears 9 and 10 is provided with a shaft rotatably supported by a bearing 19, and a drive gear 11 that meshes with the gears 9 and 10 at the same time is fixed to this shaft. has been done.

The shaft end of this driving gear 11 is connected via a coupling ring 20 to a motor 12 provided on an extension of the shaft center.

This motor 12 is supported by a mounting plate 21 fixed to the vertical member 8a.

The ball screw 7a portion of the second screw shaft 7 is attached so as to be screwed into a screw hole 13a formed in a block-shaped screw portion 13 provided in the guide member 3.

The device main body 1 has a truck 24 equipped with four wheels 23 that runs on rails 22 shown in FIGS. 2 and 6, and the longitudinal direction is shown in FIG. 6 as shown in FIG. 2. It is formed to be longer than the width direction, and its longitudinal direction is placed next to the left molding machine (not shown).

The machine frame 2 is provided on the truck 24, and a large number of first rollers 25 are arranged at predetermined intervals in the longitudinal direction on the upper surface of the machine frame 2, and in the width direction, an extension of the axis of the first rollers 25 is provided. A second roller 27 is provided above to form a pair with the first roller 25, with a space 26 having an appropriate width l in between.

These first rollers 25 and second rollers 27
is rotatable around the roller shaft.

The first roller 25 is long and the second roller 27 is short, and the space 26 between them is formed by the first roller 25.
The roller 25 and the second roller 27 are formed in such a width that they do not fall into the machine frame 2 even if a die to be replaced is placed on the roller 25 and the second roller 27.

Further, the molding machine (not shown) is provided with an overhang 28 having the same height as the apparatus main body 1.
A first roller 25, a second roller 27, and a space 26 having a width l are provided.

Next, the effect will be explained.

First, the trolley 24 of the mold conveying device according to the present invention
is placed next to the molding machine, and the apparatus main body 1 is moved to the overhang 28 provided on the molding machine, so that both the first roller 25, the second roller 27, and the space 26 are aligned with each other.

Next, the gear 1 connected by driving the motor 12
When gear 1 is rotated, gear 9 meshing with it,
It rotates 10 times.

As a result, the first screw shaft 6 and the second screw shaft 7 also rotate.

The rotational movement of the second screw shaft 7 is caused by the rotation of the guide member 3.
Since the second threaded shaft 7 is advanced to the left side in FIGS. 1 and 2 by the threaded portion 13 provided in the threaded part 13, the supporting means 8 supporting the second threaded shaft 7 is also attached to the rail 14 of the guide member 3. proceed along.

Also, due to the rotation of the first screw shaft 6, the push/pull tool main body 5
The mold also moves to the left guided by the hanging portion 5a fitted to the fork 8d and approaches the mold 16 in the molding machine.

When the push/pull tool 5b comes close to contacting the connecting piece 17 attached to the mold 16, the tip of the push/pull tool 5b is raised and lowered to engage the connecting piece 17.

At this point, when the rotation drive means 12 is reversed, the push/pull tool 5b begins to retreat, and the support means 8 also retreats, so that the mold 16 is moved to the first roller 25 of the device body 1.
It is pulled out onto the second roller 27 and carried out from the overhang section 28 onto the cart 24.

Similarly, when there is a mold to be used next in the device main body 1, after engaging the push-pull tool 5b and the mold connection piece 17, the mold is moved by the push-pull tool 5b by the operation opposite to the above. It can be pushed and fed to the molding machine.

In the above embodiments, the case where the molding machine is located on the left side as shown in FIG. 1 has been described, but the molds can be replaced in the same way even when the molding machine is located on the right side or both the left and right sides.

Next, other embodiments of the present invention will be described with reference to FIGS. 7 to 12, using the same reference numerals for parts common to FIGS. 1 to 6.

In this case, the push/pull device 29 has a first screw shaft 6 on which the push/pull tool main body 30 is movably fitted, and a second screw shaft 7 parallel to the first screw shaft 6, each rotatable at both ends. A supporting means 31 consisting of vertical members 31a, 31a to be supported and horizontal members 31b, 31c connecting these members 31a, 31a vertically, the first screw shaft 6 on one side of the vertical member 31a of the supporting means 31, and A gear 11 that meshes with the gears 9 and 10 of the rotation transmission member, which are respectively fixed with the second screw shaft 7 protruding, is provided as an intermediate transmission member that can simultaneously impart rotation, and a motor 12 coupled to the shaft of this gear 11 is provided. It is constituted by rotation driving means such as.

The machine frame 2 of the apparatus main body 1 has a guide member 32 on the upper surface of a frame 32a, to which a trapezoidal rail 32b, which is wide at the top and narrow at the bottom in cross section, is fixed, and is fixed in the longitudinal direction. At a predetermined position on the upper surface of the longitudinal frame 32a, a block-shaped threaded portion 33, which limits the horizontal movement of the push/pull device 29, is fixed by fastening means such as bolts.

A lower horizontal member 31c of the support means 31 is fitted onto the rail 32b of the guide member 32 so as to be slidable in the longitudinal direction.

The upper horizontal member 31b of the support means 31 is formed into a rod shape, and is attached to the pusher by passing through a hole 30a formed in the lower part of the pusher main body 30.

A ball screw 6a is formed on the first screw shaft 6, and the upper part of the push/pull tool body 30 is externally fitted onto the ball screw 6a by threading.

Therefore, the push/pull tool main body 30 can move without tilting even with respect to the rotation of the first screw shaft 6.

The push/pull tool main body 30 has a pin 1 on the top surface.
A push/pull tool 30b which can be raised and lowered by means of 5 is provided, and the tip of this push/pull tool 30b can be engaged with and disengaged from a connecting piece 17 provided on the mold 16.

Both ends of the first screw shaft 6 are connected to the supporting means 31.
It is rotatably supported by bearings 18, 18 provided on the vertical member 31a.

The second screw shaft 7 is provided parallel to the lower side of the first screw shaft 6, and similarly to the first screw shaft 6, a ball screw 7a is formed, and this threaded portion is the same as the threaded portion of the first screw shaft 6. It is in line with the length.

Just like the first screw shaft 6, both ends of the second screw shaft 7 are rotatably supported by bearings 18, 18 provided on the vertical member 31a of the support means 31.

Ends of the first screw shaft 6 and the second screw shaft 7 opposite to the molding machine are connected to the vertical member 31, respectively.
Gears 9 and 10 are fixed to the protruding portions of the gears 9 and 10, respectively, and have the same diameter.

Further, the vertical member 31a on the side of the gears 9 and 10 is provided with a shaft rotatably supported by a bearing 19, and a driving gear 11 that meshes with the gears 9 and 10 at the same time is fixed to this shaft. It is set up.

The shaft end of this driving gear 11 is connected via a coupling 20 to rotational driving means such as a motor 12 provided on an extension of the shaft center.

This motor 12 is connected to the vertical member 31a.
It is supported by a mounting plate 21 fixed to.

The ball screw 7a portion of the second screw shaft 7 is attached so as to be screwed into a screw hole 33a bored in a screw portion 33 provided in the guide member 32.

The device main body 1 has four wheels 23 running on rails 22 as shown in FIGS. 8 and 12.
As shown in FIG. 8, the trolley 24 is formed to be longer in the longitudinal direction than the width direction shown in FIG. 12. It's summery.

The machine frame 2 is provided on the truck 24, and a large number of first rollers 25 are arranged at predetermined intervals in the longitudinal direction on the upper surface of the machine frame 2, and in the width direction, an extension of the axis of the first rollers 25 is provided. A second roller 27 is provided above to form a pair with the first roller 25, with a space 26 having an appropriate width l in between.

These first rollers 25 and second rollers 27
is rotatable around the roller shaft.

The first roller 25 is long and the second roller 27 is short, and the space 26 between them is formed by the first roller 25.
The roller 25 and the second roller 27 are formed in such a width that they do not fall into the machine frame 2 even if a replaced mold is placed on the roller 25 and the second roller 27.

Further, the molding machine (not shown) is provided with an overhang 28 having the same height as the apparatus main body 1.
A first roller 25, a second roller 27, and a space 26 having a width l are provided.

Next, the effect will be explained.

First, the trolley 2 of the mold conveying device 1 according to the present invention
4 on the side of the molding machine, and move the main body 1 of the apparatus to the overhanging part 28 of the molding machine so that both the first roller 25, the second roller 27, and the space part 26 are aligned with each other.

Next, the gear 1 connected by driving the motor 12
When gear 1 is rotated, gear 9 meshing with it,
It rotates 10 times.

As a result, the first screw shaft 6 and the second screw shaft 7 also rotate.

The rotational movement of the second screw shaft 7 is caused by the rotation of the guide member 3.
Since the second threaded shaft 7 is advanced to the left side in FIGS. 7 and 8 by the threaded portion 32 provided on the second threaded shaft 7, the horizontal member 31a of the support means 31 supporting the second threaded shaft 7 is also moved. Move left along the rail 32b of the guide member 32.

Further, due to the rotation of the first screw shaft 6, the push/pull tool main body 30 also moves to the left on the first screw shaft 6 while being guided by the horizontal member 31b, and approaches the mold 16 in the molding machine.

When the push/pull tool 30b comes close to contacting the connecting piece 17 attached to the mold 16, the tip of the push/pull tool 30b is raised and lowered, and the connecting piece 17
to engage.

At this point, when the rotation driving means 12 is reversed, the first screw shaft 6 and the second screw shaft 7 rotate in the opposite direction, so the push/pull tool 30b begins to retreat, the support means 31 also retreats, and the mold 16 is moved to the main body of the device. 1 onto the first roller 25 and second roller 27, and is carried out from the overhang portion 28 onto the cart 24.

Similarly, when there is a mold to be used next in the device main body 1, after engaging the push/pull tool 30b and the connecting piece 17 of the mold, push the mold by the push/pull tool 30b in the opposite manner to the above. Then, it can be supplied to the molding machine.

In the above embodiments of the present invention, gears are used as the rotation transmitting member and the intermediate rotation transmitting member, but a sprocket and a chain, a pulley and a belt, etc. may also be used.

[Effect of idea]

As explained above, in a mold conveying device such as an injection molding machine, the present invention provides a first threaded shaft for screwing together a push/pull tool main body having a push/pull tool that engages with a mold, and A second threaded shaft parallel to the shaft and threaded into a threaded portion of a guide member fixed to the machine frame side of the device main body of the mold conveying device is rotatably supported on supporting means at both ends. The support means guides the movement of the push/pull tool main body, and a rotation transmission member is fixed to the same end of the first screw shaft and the second screw shaft, so that rotation can be applied to the rotation transmission member at the same time. A push/pull device is provided, which has an intermediate rotation transmission member, and a rotation drive means that couples a single drive source to the intermediate rotation transmission member to simultaneously apply rotation to the first and second screw shafts. This push/pull device is movable with respect to the machine frame by the guide member, and the total stroke of the two screw shafts can be moved, so it is compact and the width of the cart is minimized. It becomes an inexpensive device. Since it becomes easy to carry the mold into and out of the molding machine and to carry it in and out of the left and right molding machines, the work can be carried out at low cost.

[Brief explanation of drawings]

Fig. 1 is a plan view of an embodiment of a mold conveying device such as an injection molding machine according to the present invention, Fig. 2 is a side view of Fig. 1, and Fig. 3 is a cross section taken along △-△ of Fig. 1. A detailed cross-sectional view of the push-pull device of the present invention, Figure 4 is B of Figure 3.
-B sectional view, FIG. 5 is a view taken in the Y direction of FIG. 3, FIG. 6 is a view taken in the X direction of FIG. 8 is a side view of FIG. 7, FIG. 9 is a detailed sectional view of the push-pull device taken along the line C--C in FIG. 7, and FIG. 10 is a side view of FIG. DD sectional view in the figure, No. 11
The figure is a view in the W direction of FIG. 9, and FIG. 12 is a view in the Z direction of FIG. 7. DESCRIPTION OF SYMBOLS 1... Device main body, 2... Machine frame, 3... Guide member, 4... Push/pull device, 5... Push/pull tool main body, 5b...
...Push/pull tool, 6...First screw shaft, 7...Second screw shaft, 8...Supporting means, 9, 10, 11...Gear,
12...Motor, 13...Screwing portion, 16...Mold, 17...Connecting piece, 29...Pushing device, 30...
...push/pull tool main body, 30b...push/pull tool, 31...supporting means, 32...guide member, 33...screwing portion.

Claims (1)

[Scope of utility model registration request] In a mold conveyance device such as an injection molding machine, a first screw shaft screwing together a push/pull tool main body having a push/pull tool that engages with a mold, and a first screw shaft that is parallel to the first screw shaft and that is parallel to the mold A second screw shaft, which is screwed into a threaded part fixed to the machine frame side of the device main body of the conveying device, is rotatably supported at both ends by support means, and the push/pull tool main body is moved by the support means. and guide the first
A rotation transmission member is fixed to the same end of the screw shaft and the second screw shaft, and an intermediate rotation transmission member capable of simultaneously imparting rotation to the rotation transmission member is provided, and a single drive source is connected to the intermediate rotation transmission member. A push-pull device is provided with rotation drive means that are coupled together to simultaneously apply rotation to the first and second screw shafts, and the push-pull device is movable with respect to the machine frame by the guide member. Characteristics of mold conveyance equipment for injection molding machines, etc.