JPH0457566B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is directed to taking out various plastic molded products from an injection molding machine via an unloader, receiving the molded products falling from the unloader, and transporting them by a conveyor. The present invention relates to an apparatus in which stable and smooth conveyance of molded products can be achieved by providing a receiving member on the conveyor side to receive falling molded products.

(Prior Art) As this type of conveying device for plastic molded products, for example, the device described in Japanese Patent Publication No. 55-5450 is known. In this conventional device, when an article is transferred from a carrier to a conveyor, the processed article is received from a holder of the carrier on a lifter stand, lowered, and delivered to the conveyor.

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

That is, the bumpers shown in FIGS. 7 to 12 are for automobile bumpers. Such bumpers are injection molded by a vertical injection molding machine, and are taken out by an unloader. The bumper is moved to the transfer conveyor side, the bumper housed in the unloader is dropped onto the conveyor, and while being transferred by the conveyor, the bumper is reversed and transferred to the next process. Its structure and operation are as follows. As shown.

In FIGS. 7 to 10, 101 is a conveyor, and a conveyor frame 102 on a support 102a
A head pulley 1 is rotatably mounted on both ends of the
03 and a tail pulley 104, and this conveyor 101 conveys a bumper 105 taken out from an injection molding machine (not shown) in the direction of arrow a. The bumper 105 is taken out by an unloader (not shown) at a drop position 106 at the center of the injection molding machine and falls onto the conveyor 101 in an upward position. Guide frames 107 are attached to both sides in the lateral direction. The bumper 105 is approximately U-shaped as shown in FIG.

108 is a reversing means for receiving and reversing the bumper 105 on the conveyor 101, and is provided on the support frame 109. This reversing means 10
8 is a support frame 10 supported by bearing bodies 110 at both ends at a lower position on the outer side of the conveyor 101 in the conveyance direction.
A rotating shaft 111 is rotatably mounted on the rotating shaft 111, and a rotating shaft 111 is fixed to both ends of the rotating shaft 111, and is rotatable between an upright state and a substantially horizontal state on the outward side in the conveyance direction. A pair of transverse reversing arms 112 are provided, each of which receives the bumper 105 on the conveyor 101 when the reversing arm 112 stands up, and inverts the bumper 105 and transfers it onto the reversing arm 112 when the reversing arm 112 rotates in the horizontal direction. A receiving claw 113 fixed to each reversing arm 112 and each reversing arm 112
A receiving claw 113 and a short positioning claw 114 provided in parallel are provided on the free end side of the receiving claw 113. Reversing arm 112, receiving claw 113, and positioning claw 114
is configured in a substantially F-shape. The rotating shaft 11 is a winding transmission mechanism 11 consisting of a sprocket, chain, etc.
5. It is interlocked and connected to a reversing drive motor 117 on the support frame 109 via a reversing worm reducer 116, and can be rotated forward and backward by the reversing drive motor 117.

Reference numeral 118 designates a receiving plate for receiving the bumper 105 which has been reversed by the reversing means 108, and has guide rods 119 at both lateral ends and an adjustment screw 120 at the center thereof, each protruding downward. The adjustment screw 120 is inserted into the support frame 1 so as to be slidable up and down.
Adjustment handle 1 that can only be rotated freely on 09
21 is screwed together. Therefore, the position of the receiving plate 118 can be adjusted up and down according to the dimensions of the bumper 105 by operating the adjustment handle 121.

Reference numeral 122 denotes a first positioning means for determining the position of the bumper 105 in the conveying direction, and includes a contact plate 123 placed closer to the conveyor 101 than the receiving plate 118. The movable table 126 is provided on the support frame 109 so as to be freely movable in the transport direction, and the movable table 126 is provided on the support frame 109 with an adjustment screw 127 so that the position can be adjusted freely. The adjustment screw 127 can be rotated by a ratchet lever 129 at one end in the lateral direction via a winding transmission mechanism 128 or the like, and therefore, the position of the movable table 126 can be arbitrarily adjusted by operating the ratchet lever 129.

130 is a second positioning means for determining the lateral position of the bumper 105, and is a second positioning means for determining the lateral position of the bumper 105;
9 has a pair of pressing bodies 131 provided laterally outward, and each pressing body 131 is movable laterally by an air cylinder 132. The air cylinder 132 is attached to a horizontal movable base 133, and the movable base 133 is attached to the support frame 10.
It is supported by a lateral guide rod 134 supported by 9, and its position can be adjusted in the lateral direction by an adjustment screw 135. The adjustment screw 135 is rotatably supported by the support frame 109 and has an adjustment handle 136 at one end. Reference numeral 137 denotes a reversal prevention bar, which is attached to each reversal arm 112.

Next, the operation of the above configuration will be explained. 12th
As shown in the figure, the bumper 105 is at the falling position 106.
When it falls and is placed on the conveyor 101 in an upward state, it naturally rotates until it assumes a stable posture, and is conveyed by the conveyor 101 in the direction indicated by the arrow a in that stable posture. When the bumper 105 reaches the position, the reversing means 1
The reversing arm 112 of 08 is rotated around the rotation axis 111 b
It rotates in the direction of the arrow b, receives the bumper 105 on the conveyor 101 with the receiving claw 113, and while supporting it between the reversing arm 112, rotates in the direction of the arrow b. As a result, the bumper 105 also gradually rotates in the direction indicated by arrow b, and from the position where it is supported on the receiving claw 113, it finally rotates inverted due to its own weight and moves onto the reversing arm 112 as shown in FIG. I'm going to be done. Then, when the reversing arm 112 rotates to a substantially horizontal state, the bumper 105 is completely reversed as shown below. Next, the air cylinder 125 of the first positioning means 122 is operated, and the bumper 105 is positioned by the contact plate 123. Nail 11
4 side to position the bumper 105 in the transport direction. Next, the second positioning means 1
30 air cylinders 132 are operated, and the pair of pressing bodies 131 press both ends of the bumper 105 outward to position it in the lateral direction. At the time of this positioning, if the thickness of the bumper 105 is small, etc., adjust the receiving plate 118 so that it is located above the reversing arm 112 in the horizontal state, and place the bumper 105 in the inverted state on the receiving plate 118. Just do it.

As seen in the above technology, dropping such a plastic molded product from an unloader onto a conveyor may cause the molded product to fall onto the conveyor surface due to the impact due to the shape, weight, etc. of the molded product. Look around and turn in unexpected directions,
This may cause problems such as the inclination of the machine and prevent it from being transported to the next process, and the injection molding machine may
Individual molding (two moldings at the same time in one molding operation in the mold)
When molding individual products), when they are dropped from an unloader onto a conveyor, they may interfere with each other and become unable to be conveyed. In such cases, workers must correct the falling posture. This not only requires time and effort, but also reduces productivity.

Therefore, in order to smoothly transfer the molded products from the unloader to the conveyor in the bumper conveyance device, the
It is conceivable to apply the technique disclosed in Publication No. 55-5450.

However, although the above-mentioned conventional technique can be applied to transfer one molded product to a conveyor one by one, it cannot be applied to one to transfer two molded products to a conveyor one by one.

That is, as mentioned above, if there are two injection molded products, place the injection molded products one by one on the conveyor,
The reversing means must invert them one by one, but if the transfer means simply places two of them on the conveyor at the same time, there is a risk that the two will be conveyed at the same time, causing a jam in the reversing means.

Therefore, if the molded product is made of two pieces and the next step is to process one piece at a time, the above-mentioned conventional technique cannot be applied.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a plastic molded article conveying device that can transfer two-piece products one by one to a conveyor.

(Means for Solving the Problems) In order to achieve the above object, the present invention takes the following measures. That is, the conveyor for plastic molded products of the present invention is characterized by a conveyor that receives plastic molded products from an injection molding machine via an unloader and transports the plastic molded products. In a plastic molded product conveyance device in which a receiving member for supporting a molded product is arranged to be movable up and down, the conveyor is provided with a push-up member that is movable up and down to push up the molded product on the receiving member. The width dimension in the conveyor conveyance direction is less than half the width dimension of the receiving member in the same direction, and the push-up member is disposed in the latter half of the width of the receiving member in the conveyor conveyance direction.

(Function) According to the present invention, the plastic molded article molded by the injection molding machine is received by the unloader. If there are two injection molded products, the unloader will receive the two at the same time. Then, a receiving member provided on the conveyor rises and simultaneously receives the two products from the unloader. At this time, two products are lined up and placed on the upper surface of the receiving member along the conveyance direction of the conveyor.

As the receiving member descends, the molded product on the receiving member is transferred to the conveyor. However, in the present invention, since the push-up member is arranged in the rear half of the receiving member, by keeping this push-up member on standby above the conveyance surface of the conveyor, the products placed on the rear half of the receiving member can be is received by the push-up member and not transferred to the conveyor. Only the products placed on the front half of the receiving member are transferred onto the conveyor and transported to the next process by the conveyor. Then, after a predetermined period of time has elapsed, by lowering the push-up member, the products on the push-up member are transferred onto the conveyor, and the two-piece products are transported one by one to the next process.

(Embodiment) A suitable embodiment of the device of the present invention is shown in FIGS. 1 to 5.
This will be explained with reference to the figures. The conveyor 4 is stretched around a head pulley 8 and a tail pulley 9 so as to be able to circulate freely, and is moved in the direction of arrow a by a drive device 10 such as a motor provided on the tail pulley 9 side, and a transmission mechanism 11 such as a chain or sprocket. shall be used to transport the molded product. The installation frame 12 of the conveyor 4 is used at the conveyance entrance of the conveyor 4, that is, on both sides of the conveyor on the head pulley 8 side. The guide rod 14 is provided with receiving members 6,6 on the members 6,6.
is slidably inserted into the guide boss 15 provided on the bracket 13 side via a bush 16 etc., and the fluid pressure (air) installed in the bracket 13 is
By connecting the piston rod 7a of the cylinder 7 to the receiving member 6 via the connecting portion 17, the pair of receiving members 6, 6 are attached to the mounting brackets 13, 13 so as to be movable up and down. The receiving members 6, 6
may receive only one bumper 5 as shown in FIG. 1, or may receive two bumpers 5 at the same time as shown in FIG. 5 as bumpers 5, 5. In the case of receiving these two pieces, injection molding machine 1 is
This is to cope with the case of individual molding (molding two molded products simultaneously in a mold in one molding operation). In addition, in this type of bumper that receives two bumpers 5, 5 at the same time, as shown separately in FIGS. Push-up tables 18, 18 are provided so as to be able to move up and down, and which can push up and support one bumper 5 located at the rear in the conveying direction among the bumpers 5, 5 upwardly independently of the receiving member 6, 6 surface. That is appropriate. Of the two bumpers 5, 5, one bumper 5 located at the front in the conveying direction is sent first, and the rear bumper 5 is sent first.
For example, after the previous bumper 5 is sent to the next process from the conveyor 4, it is useful for making the rear bumper 5 wait on the conveyor 4. When feeding, the push-up tables 18, 18 may be lowered and placed. In addition, the unloader 2 shown in FIG.
This is a known method, for example, in which the attachment 3 is held by a support portion 23 at the tip of an arm 22 provided on a mounting bracket 20 of a fixed frame 19 so as to be movable up and down and swingable via a cylinder 21 for vertical position adjustment. It is assumed that the structure is as follows.
Needless to say, the shape of the pair of receiving members 6, 6 can be arbitrarily designed according to the shape of the molded product.
Further, as the elevating means, an elevating movement mechanism other than the example shown can be used, and it goes without saying that synchronous elevating and lowering and separate elevating and lowering can be freely designed.

According to the embodiment of the above configuration, the vertical injection molding machine 1
The bumper 5 obtained by this method is housed in the attachment 3 of the unloader 2, and the unloader 2 is moved to the conveyor 4 side by turning or other moving operation, and the bumper 5 in the attachment 3 is placed in the attachment 3 of the conveyor 4. When the openable and closable door bottom 3a of the attachment 3 is opened and dropped onto the conveyance surface on the conveyance entrance side, two of the falling bumpers 5 are placed on both outer sides of the conveyance entrance side of the conveyor 4.
The following effects can be obtained by disposing the pair of receiving members 6, 6 that support the parts so as to be movable up and down, such as by supporting them on the piston rod 7a of the fluid pressure cylinder 7. That is, in FIG. 1, the unloader 2
After placing the attachment 3 directly under the injection molding machine 1 and housing the bumper 5 from the molding machine 1,
The attachment 3 is moved above the conveyance entrance of the conveyor 4, and the pair of receiving members 6, 6 on the side of the conveyor 4 are moved upward by the lifting of the piston rods 7a, 7a of the hydraulic cylinders 7, 7. When the door bottom 3a is opened and the bumper 5 is ejected and dropped, the bumper 5 is supported at two points by the pair of receiving members 6, 6. It will be supported. Therefore, by lowering the receiving members 6, 6 below the conveying surface of the conveyor 4 through the lowering of the piston rods 7a, 7a, the bumpers 5 supported by the receiving members 6, 6 are grounded on the conveyor conveying surface. Therefore, by starting the conveyor 4 next, the bumper 5 will be transported without any problem. As a result, the bumper 5 falls directly onto the conveyor 4, and is stably and smoothly supplied without fear of changing position or direction or tilting on the conveyor due to the impact. At this time, by making the shape and size of the receiving members 6, 6 compatible with the target plastic molded product so that they can be safely received, it is possible to apply it not only to the bumper 5 but also to all plastic molded products. Needless to say.

(Effects of the Invention) According to the present invention, two molded products are simultaneously received by one receiving member, and then the molded products are transferred one by one onto the conveyor via the push-up member. , can be transported to the next process one by one.

In this case, it is conceivable to provide two receiving members to individually receive the products from the unloader and transfer them onto the conveyor, but if two receiving members are provided,
The operation of the two receiving members and the unclamping operation of the unloader must be individually timed.
Although the control device becomes complicated, in the case of the present invention, it is only necessary to control the timing of the receiving member and the push-up member, so the control becomes easy.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the arrangement relationship of the embodiment of the device of the present invention, Fig. 2 is a plan view of the embodiment, Fig. 3 is a front view of the same, and Fig. 4 is a plan view of the main part of the receiving member. FIG. 5 is a longitudinal sectional front view of the same part, FIG. 6 is a side view of the same part, and FIGS. 7 to 12 are explanatory views of the conveyance device shown as a comparative example. 1... Injection molding machine, 2... Unloader, 4... Conveyor, 5... Bumper (plastic molded product),
6...Receiving member, 18...Pushing member.

Claims (1)

[Scope of Claims] 1. In a conveyor that receives and transports plastic molded products from an injection molding machine via an unloader, a receiving member that supports the molded products falling from the unloader is movable up and down on the conveyor side. In the disposed plastic molded product conveyance device, the conveyor is provided with a push-up member that pushes up the molded product on the receiving member so as to be movable up and down,
The width of the push-up member in the conveyor transport direction is less than half the width of the receiving member in the same direction,
The apparatus for conveying plastic molded products is characterized in that the push-up member is disposed at the rear half of the width of the receiving member in the conveyor conveyance direction.