JPH0457571B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides a molded article receiving structure on the conveyor for receiving a plastic molded article from an injection molding machine and transporting and reversing it on a conveyor. This invention relates to an injection molding machine that, through improvement, enables the injection molding machine to take two molded products, thereby increasing its efficiency, and also enables smooth conveyance and reversal of the molded products on a conveyor.

(Prior art) For example, Japanese Patent Application Laid-Open No. 58-63619 and Japanese Utility Model Application No.
There are those described in Publication No. 58-71039, etc. These conventional methods convey two-piece articles that have been conveyed on a flat surface from a first conveyor one by one to a second conveyor arranged in series, or convey multiple articles placed on a flat surface one by one. were conveyed one by one on an inclined conveyor.

(Problems to be Solved by the Invention) By the way, the applicant of the present application has proposed a novel conveying/reversing device shown in FIGS. 7 to 12.

In FIGS. 7 to 10, 1 is a conveyor, which is hung between a head pulley 3 and a tail pulley 4, which are rotatably mounted on both ends of a conveyor frame 2 on a support column 2a. 1 is a bumper 5 taken out from an injection molding machine (not shown)
is conveyed in the direction of arrow a. The bumper 5 is taken out by an unloader (not shown) at the dropping position 6 at the center of the injection molding machine, and placed in an upward position on the conveyor 1.
Accordingly, a guide frame 7 is attached to the conveyor frame 2 on the lateral side corresponding to this falling position. The bumper 5 is approximately U-shaped as shown in FIG.

8 is a reversing means for receiving and reversing the bumper 5 on the conveyor 1, and is provided on the support frame 9. This reversing means 8 has a rotating shaft 11 rotatably mounted on a support frame 9 by means of bearings 10 at both ends at a lower position on the outer side of the conveyor 1 in the conveying direction, and a rotating shaft 11 at both ends of the rotating shaft 11. a pair of horizontal reversing arms 12 that are fixedly installed and are rotatable between an upright state and a substantially horizontal state on the outward side in the conveyance direction;
Fixed to each reversing arm 12 so as to receive the bumper 5 on the conveyor 1 when the reversing arm 12 stands up, and to invert the bumper 5 and transfer it onto the reversing arm 12 when rotating in the horizontal direction. A receiving claw 13 and a short positioning claw 14 provided parallel to the receiving claw 13 on the free end side of each reversing arm 12.
and a reversing arm 12 and a receiving claw 13.
The positioning claw 14 is formed in a substantially F-shape. The rotating shaft 11 includes a winding transmission mechanism 15 consisting of a sprocket, a chain, etc., and a worm reducer 1 for reversing.
6 to a reversing drive motor 17 on the support frame 9, and the reversing drive motor 17 enables forward and reverse rotation.

Reference numeral 18 designates a receiving plate for receiving the bumper 5 which has been reversed by the reversing means 8, and has guide rods 1 at both lateral ends.
9. Adjustment screws 20 are provided in the center to protrude downward, and each guide rod 19 is inserted into the support frame 9 so as to be slidable up and down, and the adjustment screw 20 is inserted into the support frame 9 so that it can only rotate freely. It is screwed into a provided adjustment handle 21. Therefore, the position of the receiving plate 18 can be adjusted up and down according to the dimensions of the bumper 5 by operating the adjustment handle 21. Reference numeral 22 denotes a first positioning means for determining the position of the bumper 5 in the transport direction, and includes a contact plate 23 disposed closer to the conveyor 1 than the receiving plate 18, and this contact plate 23 is connected to a movable base via a guide rod 24 and an air cylinder 25. 26 so as to be able to move in and out in the transport direction,
Further, the movable table 26 is mounted on the support frame 9 with adjustment screws 27 so that its position can be freely adjusted. The adjustment screw 27 can be rotated by a ratchet lever 29 at one end in the lateral direction via a winding transmission mechanism 28 or the like.
Therefore, the position of the movable base 26 can be adjusted as desired by operating the ratchet lever 29. 30 is a second positioning means for determining the lateral position of the bumper 5, and has a pair of pressing bodies 31 provided on the support frame 9 facing outward in the lateral direction, each of the pressing bodies 31 being an air cylinder. 32, it can move in and out laterally. The air cylinder 32 is attached to a horizontal movable base 33, and the movable base 33 is attached to a horizontal guide rod 34 supported on the support frame 9.
, and its position can be adjusted in the lateral direction using an adjustment screw 35. The adjustment screw 35 is rotatably supported by the support frame 9 and has an adjustment handle 36 at one end. Reference numeral 37 denotes a reversal prevention bar, which is attached to each reversal arm 13.

Next, the operation of the above configuration will be explained. 12th
As shown in the figure, when the bumper 5 falls and is placed on the conveyor 1 in an upward position at the falling position 6,
It rotates naturally from beginning to end to maintain a stable posture.
In this stable posture, the object is conveyed by the conveyor 1 in the direction indicated by the arrow a. When the bumper 5 reaches the position shown in FIG. 12, while rotating in the direction indicated by the arrow b. As a result, the bumper 5 also gradually rotates in the direction indicated by the arrow b, and finally rotates inverted due to its own weight from the position where it is supported on the receiving claw 13, and moves onto the reversing arm 12 as shown in FIG. It will be posted. Then, when the reversing arm 12 rotates to a substantially horizontal position, the bumper 5 is completely inverted as shown in FIG. The bumper 5 is pressed toward the claw 14 side to position the bumper 5 in the transport direction. Subsequently, the air cylinder 32 of the second positioning means 30 is operated, and the pair of pressing bodies 31 press both ends of the bumper 5 outward to perform lateral positioning. At the time of this positioning, the dimensions of the bumper 5
If L ₄ is small, etc., the receiving plate 18 may be adjusted to be located above the reversing arm 12 in the horizontal state, and the bumper 5 in the inverted state may be placed on the receiving plate 18.

The above example shows the case of an automobile bumper, but when obtaining a plastic molded product using an injection molding machine, various molded products have different positions when ejected from the molding machine. A frequently used method is to invert the product to a position that is easy to handle in the next process. However, in the conventional method, the target is an injection molding machine that takes one product (only one molded product is molded in the mold), and one plastic molded product discharged from the injection molding machine is processed by an unloader. The system drops the material onto a conveyor, transports it, reverses it, and then feeds it to, for example, one piece of stock equipment.
When using an injection molding machine that takes two products (in which two identical molded products are molded in a mold), the conventional technology has a problem in that it cannot be transported and reversed. In other words, from the perspective of an injection molding machine, a two-cavity type that can simultaneously obtain two molded products in one molding operation is more efficient; Even if the molded products are fed at the same time, it is not possible to provide a sufficient distance between the front and rear molded products, so if the molded products are transported as is, it is impossible to transport and reverse the two molded products in an orderly manner. Transportation of plastic molded products
It is limited to only inversion, has poor molding efficiency, and is difficult to shorten or improve the overall production cycle.

In such a case, the above-mentioned prior art Japanese Patent Application Laid-open No. 58-
It is conceivable to apply the techniques disclosed in Publication No. 63619 and Japanese Utility Model Application Publication No. 58-71039.

However, the method described in JP-A-58-63619 requires two conveyors, a first conveyor and a second conveyor, and also requires a separation supply and discharge device between both conveyors, resulting in a complicated structure. Become.

Furthermore, the method described in Japanese Utility Model Application Publication No. 58-71039 requires the conveyor to be tilted, and cannot be used for unstable molded products such as the bumper because there is a risk of the product falling over.

(Means for Solving the Problems) In order to solve the problems in the conventional molded product conveyance/reversal system as described above, the present invention aims to solve the problems in the conventional molded product conveyance/reversal system. To provide a conveying and reversing device that allows products to be conveyed and reversed in the following order without fear of confusion on a conveyor, and that can also be used for an injection molding machine that takes out a single product. Specifically, the transport conveyor includes a conveyor for transporting plastic molded products, means for receiving and inverting the molded products on the conveyor, and positioning means for positioning the inverted molded products. A molded product unloader is disposed between the molded product injection molding machine and the molded product unloader that receives two molded products from the molding machine and transfers them to a conveyor. Among the molded products, a front support part that directly receives the molded product located at the front in the conveyor transport direction from the unloader, and a movable up-and-down support part that receives the molded products located at the rear in the conveyor transport direction on both sides of the conveyor. A rear support portion is provided for receiving via a standby receiving member.

(Operation) According to the technical means of the present invention, FIGS.
As shown in the figures, for convenience, this example shows an application of the present invention to the conveying and reversing device for an automobile damper as previously explained in FIGS. 7 to 12. 1 and 2, a vertical injection molding machine E (details are omitted because it is well known) and a conveying/reversing device M (same as the device illustrated in FIGS. 7 to 12) are shown. The bumper 5 obtained by the molding machine E is received between the machine
An unloader (product unloading device) 40 is provided for moving the product to the side. This unloader 40 is a known one that has been conventionally used in the above-mentioned conveying/reversing device M, but in the present invention, two vertical injection molding machines E are used (one molding process in the mold). It is a molding machine that simultaneously molds two bumpers 5 by operation, and correspondingly, the unloader 40 is also
As shown in Figures 1 and 2, an attachment that can simultaneously support and receive two bumpers 5 and 5' that are dropped upward and discharged from the molding machine E in a parallel manner and in a substantially U-shape. 41 and the known structure in the unloader 40, namely the mounting bracket 4 at the upper end of the fixed frame 42.
3, one end of the attachment 41 is attached to the support portion 4 at the tip of an arm 45 which is provided vertically and pivotably via a vertical position adjustment cylinder 44.
6, the injection molding machine E
The two bumpers 5, 5' are received by the attachment 41 at a position directly below the arm 45.
The attachment 41 is moved perpendicularly to the conveyor 1 above the entrance of the conveyor 1 in the conveyance/reversal device M by the rotation of the attachment 4.
1 as a door bottom 47 that can be opened and closed freely.
By opening, the two bumpers 5, 5' are allowed to fall onto the conveyor 1, and in contrast, the two bumpers 5, 5' on the conveyor 1 fall onto the conveyor surface in parallel. As shown in FIGS. 3 and 4, the bumper 5, which is located at the front and falls onto the conveyor 1, faces the conveyance direction indicated by the arrow a of the conveyor 1, as shown in FIGS.
The bumper 5' is supported by falling directly onto the conveyor conveyance surface, and on the other hand, the bumper 5' which is located at the rear in the conveyance direction and falls onto the conveyor 1 is placed in the width direction of the conveyor 1 corresponding to the falling position. on both outsides,
The standby receiving members 48, 48, which are arranged to be able to rise and fall freely, are placed so as to protrude above the conveyor conveyance surface in advance, so that the receiving members 48, 48 are provided so as to be supported by falling on the receiving members 48, 48. The following effects occur. That is, the attachment 41 of the unloader 40 is located directly below the injection molding machine E, and the standby receiving members 48, 4 in the conveying/reversing device M
8 is raised above the conveyance surface of the conveyor 1, the two bumpers 5 and 5' molded in the injection molding machine E are received on the attachment 41, and placed above the entrance of the conveyor 1 as shown in the second figure. By moving the door bottom 47 of the attachment 41 as shown in FIG. On the other hand, bumper 5'
is supported at two points on the standby receiving members 48, 48. Therefore, by next starting the transport conveyor 1, the bumper 5 moves in the direction of the arrow a, and the bumper 5 moves in the direction of the arrow a and reaches the end of the transport of the conveyor 1, similar to what was previously explained in FIGS. 7 to 12. The reversing means 8 performs the reversing movement shown in FIG. 12, and the bumper 5 is positioned and placed on the receiving plate 18 in an inverted position. During this movement, the bumper 5' stands by while being supported on the waiting movement members 48, 48, and since the receiving members 48, 48 are higher than the conveyor conveyance surface, the bumper 5' There is no risk that it will be carried along with 5. Therefore, after confirming that the bumper 5 placed on the receiving plate 18 has been moved to the conveying device (not shown) for the next process, the second bumper 5 supported on the standby receiving members 48, 48 is moved. The bumper 5' of the receiving member 48, 48
A similar reversal movement for this bumper 5' will be performed by lowering it onto the conveyor transport surface and starting the conveyor 1 again. Furthermore, according to the device of the present invention, it can be used as is for a single-cavity injection molding machine E (molding only one bumper in the mold), and in this case, the standby receiving members 48, 48 can be used as is. It is sufficient to always place it in a lowered state below the conveyor transport surface.

(Example) An example of the conveying/reversing device according to the present invention will be described in the first example.
This will be explained with reference to FIGS. 6 to 6.

The unloader 40 used in the present invention is exactly the same as that used in conventional bumper molding as long as it has a shape and size that can receive the two bumpers 5, 5'.
As shown in the second figure, the bumper 7 is divided into right and left sides from the center of the bottom and can be opened freely, and the two bumpers 5,
5' can be dropped at the same time, the frame and other detailed structures are the same as before, and the first and second
Although the unloader 40 shown in the figure is of a rotating type, it is possible to select another type as appropriate depending on the arrangement relationship of the injection molding machine E and the conveying/reversing device M. Furthermore, the conveying/reversing device M shown in the embodiment is the same as that previously explained in FIGS. 7 to 12, and in FIGS. The same reference numerals indicate the same members, and only some structural differences will be explained. That is, in the case shown in FIGS. 7 to 12, in order to make the receiving plate 18 of the bumper 5 inverted by the inverting means 8 vertically adjustable according to the dimensions of the bumper 5,
In contrast to the screw elevating structure using the adjusting screw 20 and the adjusting handle 21, in the embodiment shown in FIGS. 3 to 6, a fluid pressure (air) cylinder 49 is used as shown in FIGS. The first positioning means 22, which has a contact plate 23 that raises and lowers the receiving plate 18 and also determines the position of the inverted bumper 5 in the transport direction, is shown in FIGS.
In the example shown in FIG. 2, the first positioning means 22 having the backing plate 23 is installed on a movable base 26 separated from the receiving plate 18, but in the embodiments shown in FIGS. As shown in Figures to Figures 5, the receiving plate 1
The second positioning means 30, which is installed together with the fluid pressure (air) cylinders 25 on both sides of the bumper 8, and which determines the lateral position of the bumper 5, is also provided with the seventh positioning means 30.
In the figures to FIG. 12, a pair of pressing bodies 31,
31, the bumper 5 is positioned by pressing both ends of the bumper 5 outward, whereas in the embodiment shown in FIGS. As is clear from FIG. 5, the only difference is that as the second positioning means 30, 31, 31 that press both ends of the bumper 5 from the outside to the inside are used.

Therefore, according to the present invention, between the conveyor 1 and the molded product injection molding machine E, two parts are provided from the molding machine E.
A molded product unloader 40 that receives the two molded products 5, 5' and transfers them to the transport conveyor 1 is provided. , a front support section that directly receives the molded product 5 located at the front in the conveyor transport direction from the unloader 40, and a molded product 5' located at the rear in the conveyor transport direction are arranged on both sides of the conveyor 1, and the standby can be raised and lowered freely. Receiving member 4
A rear bearing receiving via 8, 48 is provided.

The standby receiving members 48, 48 in the present invention are
As shown in FIGS. 3 and 4, the entrance side of the conveyor 1, that is, the head pulley 3
On both sides of the conveyor 1, there are frames 2,
A guide rod 51 provided on a substantially elongated table-shaped receiving member 48 is slidably inserted into a mounting bracket 50 which is constructed over a length of 9, via a guide boss 52, and a fluid pressure (air) installed on the bracket 50 is inserted.
By connecting the piston rod 53a of the cylinder 53 to the receiving member 48 via the bracket 50, the receiving member 48 can be raised and lowered freely above and below the conveying surface of the conveyor 1. Of course, this elevating mechanism is controlled by the cylinder. It is possible to use something other than a mechanism, and the length of the receiving member 48 is longer than the width of the bumper 5', and the same can be used as long as it can stably support two points on both sides of the falling bumper 5'. It is also possible to provide a buffer or a protective material on the upper surface of the receiving member 48 so as not to damage the bumper 5. In FIGS. 3 to 5, reference numeral 54 indicates a transfer claw for moving the bumpers 5, 5' that have been reversely placed and positioned on the receiving plate 18 to the next conveyance device (not shown).
The claws 54 are movable up and down on both sides of the receiving plate 18, and are movable back and forth in the direction of arrow b in FIG.

(Effects of the Invention) According to the present invention, the present invention is not limited to the exemplified bumper, but the plastic molded product produced by an injection molding machine is taken out from the molding machine one by one, and is conveyed and reversed on a conveyor. In terms of technology, it enables two-cavity molding in injection molding machines,
Furthermore, it is significantly advantageous in that these two molded products can be transported and reversed in an orderly manner without any confusion on the transport conveyor. In other words, compared to a single-cavity molding machine, a two-cavity molding machine significantly improves molding efficiency, and by having one of the two molding parts standby above the conveyor entrance using a waiting receiving member, the same molding efficiency can be achieved. Processing of two pieces on the conveyor is smoother and faster,
Compared to the conventional method of taking out one piece and processing one piece,
The overall production cycle can be shortened, and this device also has the advantage that it can be used for single-cavity molding machines by keeping the standby receiving member in the inactive position. This is an excellent improvement to the means for transporting and reversing molded products.

[Brief explanation of drawings]

FIG. 1 is a front view showing the overall arrangement relationship in an embodiment of the device of the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a plan view of the conveying/reversing device side in the embodiment of the device.
FIG. 4 is a front view of the same, FIG. 5 is a side view of the same from the cradle side, FIG. 6 is a sectional view taken along line A-A in FIG. 4, and FIGS. It is each explanatory drawing of a reversing device. 1... Conveyor, 5, 5'... Bumper, 8...
Reversing means, 18... Receiving plate, 48, 48... Standby receiving member, 50... Mounting bracket, 51... Guide rod, 53... Fluid pressure cylinder, E... Injection molding machine, M
...Transportation/reversing device, 40...Unloader, 41...Attachment.

Claims (1)

[Claims] 1 A conveyor that conveys plastic molded products,
The conveyor is equipped with a means for receiving and inverting the molded product on the conveyor, and a positioning means for positioning the inverted molded product, in which two molded products are placed between the conveyor and the molded product injection molding machine by the molding machine. A molded product unloader that receives the molded products and transfers them to the conveyor is disposed, and on the molded product receiving side of the conveyor below the unloader, the molded product located at the front of the two molded products in the conveyor conveyance direction is disposed. A front support part that directly receives the product from the unloader, and a rear support part that receives the molded product located at the rear of the conveyor transport direction via standby receiving members that can be raised and lowered on both sides of the conveyor. A device for conveying and reversing plastic molded products.