JPH0444504Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a conveying and reversing device for plastic molded products that conveys and reverses plastic molded products.

(Prior art) A special technology that automatically transports and inverts plastic molded products and ensures that the inverted molded products are positioned at the desired position to facilitate the next process. Taking as an example the "transporting and reversing device for plastic molded products" disclosed in Japanese Patent No. 60-188214, the following description will be made based on FIGS. 6 to 8.

That is, the conveyor 52 is suspended between a head pulley 59 and a tail pulley 60, which are rotatably mounted on both ends of a conveyor frame 58 supported on a support. The molded product taken out, for example, the bumper 51, is conveyed in the direction of the arrow. Further, on the lower side of the exit side of the conveyed goods 51 of the conveyor 52, with the lower position of the exit side as the center of swing, between an upright state and a position where the front exit side and the forward direction side are approximately horizontal, While receiving the swingable transported goods 51,
A reversing arm 55 for reversing is provided. On the swinging center side of the reversing arm 55, the reversing arm 55
In the upright state, a receiving claw 56 is provided at a lower position near the top surface of the conveyor 52 and protrudes in a direction opposite to the conveyance direction, which is substantially parallel to the top surface of the conveyor 52. A positioning claw 56a is provided parallel to the claw 66 and shorter than the receiving claw 66. One end of the reversing arm 55 is fixed to a shaft 69 rotatably supported by a frame 68 disposed outside the conveyor 52 in the conveying direction. A sprocket 62 is attached to one end of the shaft 69, and the sprocket 62
2 is rotated by a reversing drive motor 63 disposed below the shaft 69 via a chain 64.

The frame 68 includes a mounting table that can be raised and lowered to place the inverted bumper 51, an air cylinder that expands and contracts in the transport direction to position the bumper 51 on the mounting board in the transport direction, and a direction perpendicular to the transport direction. In this configuration, an air cylinder for positioning is provided in each case.

Therefore, the bumper 51 is taken out from the vertical injection molding machine by an unloader (not shown) and placed on the conveyor 52.
The bumper 51 is dropped upward toward the table pulley 60 side, that is, at both ends of the bumper 51 in the longitudinal direction, with the protruding portions protruding substantially perpendicular to the longitudinal direction directed upward.

The reason why the bumper 51 is dropped upward onto the conveyor 52 is due to a problem with the shape of the mold, and especially in the case of the bumper 51, which has a short protruding portion and has good stability, even when it is mounted on a car, That is, even if the bumper 51 is placed horizontally on the conveyor 52, it may end up facing upward due to the rocking during conveyance, so the function of simply taking out the bumper 51 from the mold and dropping it onto the conveyor 52 is insufficient. This is because using an unloader with a simple structure is advantageous in terms of efficiency and cost.

Therefore, when the upward bumper 51 is conveyed and comes into contact with the reversing arm 55, the reversing arm 55 is swung in the conveying direction by the reversing drive motor 63, and the receiving claw 56 lifts the bumper 51. Then, when the reversing arm 55 of the bumper 51 is swung to become substantially parallel to the conveyance direction, the protrusions at both ends of the bumper 51 are directed downward, ie, inverted, due to the momentum of the swiveling.

After the reversal, the reversing arm 55 is placed on the mounting table, and positioning is performed in the transport direction and in a direction orthogonal to the transporting direction by the operation of both air cylinders. When the reversing arm 55 is raised to a height at which it can return to its normal state, the reversing arm 55 is returned to its upright state by the reversing drive motor 63, and becomes ready to reverse the bumper 51 to be conveyed next.

(Problems to be solved by the invention) The conventional technology explained based on Figures 6 to 8 aims to save labor by automating the conveyance and reversing work that was previously performed manually. Although this device is attracting attention, it still has the following problems in practical use.

The bumper 51 is approximately U-shaped as shown in FIG. As is well known, the bumper 51 naturally has 14 functions, and its design is given equal importance as well as its functionality. Therefore, there are two types of cross-sectional shapes, for example, asymmetrical as shown in Figure 5A and symmetrical as shown in Figure 5B. be. That is, there are bumpers 51 that are unstable in the upward position and bumpers 51 that are stable. By the way, the spacing between the receiving claws 56 is the same as that of the bumper 5.
The width of the conveyor frame 58 is smaller than the interval between the receiving claws 56 in order to receive the bumper 51 by swinging upward from a position below the upper surface of the conveyor 52. narrow.

Therefore, the bumper 51 is unstable in the upward position.
Even if the conveyor frame 58 does not overturn due to falling from an unloader (not shown), it may overturn and turn over due to vibration during conveyance, and the corner of the conveyor frame 58 may be placed inside the protrusion of the bumper 51. Due to contact with objects such as the like, damage or abrasion occurs, which not only prevents the product from being used as a product, but also forces the conveyor 52 to stop operating in order to remove the product.

In addition, the stable bumper 51 is received by the receiving claw 56 and is swung by the reversing arm 55.
Even if it becomes substantially horizontal in the conveying direction, it may remain in an overturned state on the reversing arm 55 and not be reversed. That is, in this case as well, the operation of the conveyor 52 may be stopped due to artificial reversal.

Therefore, the present invention was devised to solve the problems of the conventional technology, and it is possible to transport the bumper without turning over even if the bumper is unstable in the upward position, and is a stable bumper. To provide a conveying and reversing device for a plastic molded product, which can be conveyed without being reversed even when the bumper is stable, and which can reduce the number of times the plastic molded product will not be reversed even if it is a stable bumper.

[Means for solving the problem] The present invention uses a plurality of conveyors, and makes the total width of the conveyor perpendicular to the conveying direction approximately equal to or more than the length of the conveyed items, and The problems of the conventional technology explained on the previous page are solved by providing a reversing auxiliary means for reversing the transported products in the conveying direction near the exit side of the transported products and between the plurality of conveyors. Therefore, its characteristics are as follows.
A plurality of conveyors that operate synchronously and whose full width in a direction perpendicular to the conveyance direction of the conveyed article is approximately equal to or greater than the length of the conveyed article, and arranged above the conveyor near the conveyed article exit side of the conveyor. a position detecting means for detecting the position of the conveyed article, a reversing auxiliary means provided between the plurality of conveyors for overturning the conveyed article that has been conveyed to the corresponding position in the conveying direction, and a conveyed article. It is provided on the conveying direction side with the center of swing at the bottom of the exit side blowing conveyor, and between the upper side and the lower side of the position horizontal to the center of swing, the conveyor is received on the upper side, and the conveyor is placed on the lower side. A swingable reversing arm that swings freely, and a reversing arm that is provided on the swinging center side and the free end side of the reversing arm, and clamps the transported goods received by the reversing arm while swinging downward. The structure consists of a holding body.

(Function) The present invention has a plurality of conveyors, and the total width of the conveyor is made to be approximately equal to or greater than the total length of the conveyed article so that the conveyed article does not turn over even if it rolls over on the conveyor. . Then, between the plurality of conveyors and below near the exit side of the conveyed articles, before the conveyed articles fall toward the reversing arm that swings around the lower part of the conveyor in the conveying direction, A reversing auxiliary means for overturning the conveyed article in the conveying direction is provided, and the received conveyed article is further disposed on the swinging center side and the free end side of the reversing arm based on the change in the swinging angle of the reversing arm. In this configuration, a clamping body is provided to support the reversing arm so that it does not shift in the longitudinal direction.

Therefore, the article to be conveyed is taken out from the vertical injection molding machine by an unloader (not shown), and is dropped onto the conveyor in an upward direction. When the fallen article is conveyed to the exit side of the conveyor and detected by the position detection means, the reversing assisting means is actuated by a signal from the position detection means, and the conveyed article is overturned. I am made to do so. That is, the upper part of the conveyed article is rotated in the conveying direction and is dropped from the exit side of the conveyor. The dropped article to be transported is received by the reversing arm with the surface opposite to the conveyor facing the reversing arm side of the transported article facing upward on the conveyor. Then, the reversing arm is swung downward. During the swinging of the reversing arm, when the reversing arm is located above the swinging center, a force toward the swinging center due to gravity is generated on the received item, and the swinging When the reversing arm is located below the center, a force is generated toward the free end, but since a clamping body is provided on the swing center side and the free end of the reversing arm to clamp the transported product, the receiving The transferred article is held by the clamping body and is reversed without shifting in the longitudinal direction of the reversing arm during the swinging of the reversing arm.

(Example) This example will be described below based on FIGS. 1 to 5.

That is, 2 shown in FIGS. 1 to 3 represents two conveyors with a gap between them,
The two conveyors 2 have a head pulley 9 and a tail pulley 1 which are rotatably mounted in series on both ends of a conveyor frame 8 supported by a support frame 7.
It is hung between 0. The two head pulleys 9 are connected by a universal joint 11 between their opposing surfaces, and a sprocket 12 is pivotally attached to the opposite surface of one head pulley 9, and a geared motor 1 is connected to the sprocket 12.
A chain 14 operated by 3 is hung thereon. The bumper 1, which is a plastic molded product, is placed on both sides of the conveyor 2 on the outside in the lateral direction orthogonal to the conveyance direction, when the conveyor 2 is dropped by an unloader (not shown) and when the conveyed article is being conveyed.
A fall prevention fence 17 is attached to prevent the object from falling.

Further, in the vicinity of the head pulley 9 of the conveyor 2, on the side opposite to the conveyance direction, there is a light transmitting section and a receiving section facing each other with the conveyor 2 in between, for detecting the position of the bumper 1 being conveyed. A phototube 3, which is a position detection means, is installed. Furthermore, the reversing arm 5 having the same structure as the phototube 3 is also provided on the upper side of the outer side in the lateral direction near the conveying end of the conveyor 2.
Phototube 3a detects bumper 1 when received at
will be installed. Then, between the two conveyors 2 and on the opposite side of the conveyance direction near the universal joint 11, a kicker 4, which is a reversing assisting means, is fixed to the bottom of the side surface of the bumper 1 in the conveyance direction. On the anti-kicking side of the kicker 4, there is a kicker cylinder 15 whose rod expands and contracts in the transport direction based on the signal from the phototube 3.
One end of is fixed. Further, a shaft parallel to the head pulley 9 is rotatably supported at both ends of the conveyor 2 outwardly and downwardly in the conveyance direction, and a bumper 1 dropped from the conveyor 2 is received between the shaft support parts. , and one ends of two parallel reversing arms 5 that swing to reverse the received bumper 1 are fixed at right angles to the axis. A lever is provided on the shaft between the fixed parts of the reversing arm 5, and the free end side of the lever receives a signal from a phototube 3a that detects the bumper 1 received by the reversing arm 5, and transports the bumper 1. Reversing cylinder 1 that extends in the direction
One end of the rod No. 6 is pivotally connected. Furthermore, the two reversing arms 5 are provided with dimensions corresponding to the vertical dimensions inside the left and right ends when the bumper 1 is mounted on the vehicle. The structure is such that a pair of clamping bodies 6 each consisting of a receiving protrusion and a positioning protrusion that are spaced from each other are provided.

Therefore, when the bumper 1 is taken out from the vertical injection molding machine by an unloader (not shown) and dropped upward onto the conveyor 2 driven by the geared motor 13, the bumper 1 is placed on the fall prevention shelf 17. conveyed along the When the bumper 1 is detected by the phototube 3, the detection signal activates the kicker cylinder 15 to raise the kicker 4 so that the free end side of the bumper 4 faces the conveyor 2 of the bumper 1. Since the surface is pushed up, the bumper 1 is given a rotation in a direction in which it falls down in the conveyance direction, and falls from the tip side of the conveyor 2 in the conveyance direction. A reversing arm 5 equipped with a clamping body 6 consisting of a receiving protrusion and a positioning protrusion is disposed below the conveyor 2 in the conveying direction, so that the side surface of the bumper 1 in the conveying direction is The bumper 1 is received on the receiving protrusion side, and with the side surface on the transport direction side being held between the positioning protrusion side. Then, the received bumper 1 is detected by the phototube 3a, and the reversing cylinder 16 is operated based on the detection signal. That is, while supporting the bumper 1, the reversing arm 5 is swung downward from the axis of the shaft through a lever operated by the reversing arm 55. It turns out.

Therefore, the vertical relationship of the bumper 1 when the reversing arm 5 becomes parallel to the conveying direction of the conveyor 2 is completely opposite to the vertical relationship when conveying by the conveyor 2, in other words, the bumper 1 is in the reversed state. It's getting old. Then, when the reversing arm 5 further swings downward, the bumper 1 is placed in an inverted state on a mounting table (not shown), and is brought to the lateral center position of the mounting table by the lateral positioning means. It is then moved to the next process. Then, when the next bumper 1 is dropped onto the conveyor 2 by the unloader, the reversing arm 5
is returned to a state in which the next bumper 1 can be received by a known fall detection signal.

Therefore, in this invention, the total width of the conveyor 2 is approximately equal to or greater than the total length of the bumper 1, so even if the bumper 1, which is unstable in the upward position, falls over, it will only roll over and will not be reversed. Moreover, since it is on the conveyor belt, it does not hit the corners of the conveyor frame 8, and the occurrence of scratches can be greatly reduced.

Then, the overturned bumper 1 is given rotation in the conveying direction by the kicker 4, and falls toward the reversing arm 5 from the exit side of the conveyor 2 in the conveying direction. The rotation in the transport direction is caused by the kicker 4 coming into contact with the lower part of the bumper 1 on the transport direction side, which is given inertia in the transport direction.

Incidentally, the overturned bumper 1 is dropped toward the reversing arm 5 without activating the kicker 4, and when it is received by the reversing arm 5, the transport direction of the bumper 1, which is being transported upward, is The receiving protrusion side is the receiving protrusion side, and the conveying direction side is the positioning protrusion side. Therefore, in order to prevent the kicker 4 from operating against the overturned bumper 1, the height of the phototube 3 that detects the conveyance position from the top surface of the conveyor 2 should be set higher than the maximum height of the overturned bumper 1. If higher, the photocell 3
Therefore, the kicker 4 will not be activated.

Moreover, before the bumper 1 which is stable in the upward state is received by the reversing arm 5, the kicker 4 is brought into contact with the lower part of the side surface of the bumper 1 in the transport direction, and rotation in the transport direction is applied. Then, it is dropped from the conveyor 2 toward the reversing arm 5, and is received by the reversing arm 5 so that the transporting direction side is on the receiving projection side and the opposite transporting direction side is on the positioning projection side, and is reliably reversed.

In the above embodiments, the bumper 1 is exemplified as a plastic molded product, but its shape may be arbitrary, and therefore it is not limited to the bumper 1.

Further, in this embodiment, the phototube 3 is used as the position detecting means, but a laser beam or a limit switch may also be used.

Further, in this embodiment, two conveyors 2 are hung, but three or more head pulleys 9 and tail pulleys 10 are each rotatably mounted on shafts in series, corresponding to the number of both pulleys 9 and 10. Number of conveyors 2
It can also be hung.

Further, in this embodiment, the two pulleys 9 and 10, which are arranged in series, are arranged such that pulleys having the same length as the two pulleys 9 and 10 are rotatably arranged.
It is also possible to hang the conveyor 2 in strips.

In order to prevent the bumper 1 from being damaged, it is desirable to attach a cushioning material such as plastic to at least the portions of the reversing arm 5, the clamping body 6, etc. that come into direct contact with the bumper 1.

(Effect of the invention) The present invention has a plurality of conveyors 2, and the total width of the conveyor 2 in the lateral direction is approximately equal to the length of the conveyed product 1.
Or, in addition to making it equal or higher, the conveyor 2
near the conveyed goods exit side, and multiple conveyor 2
The transported goods 1 are
is pushed up, applying a rotational force in a direction inclined to the conveyance direction, and causing the conveyor 2 to fall toward the reversing arm 5. When the reversing arm 5 receives the dropped conveyed item 1, the reversing arm 5 is swung downward to invert the received conveyed article 1.

Therefore, the entire width of the multiple conveyor 2 is the conveyed product 1.
Because it is approximately equal to, or greater than, the total length of
Even if the conveyed article 1, which is unstable in the conveying state, overturns on the conveyor 2, it will not turn over, and it will rarely come into contact with components other than the conveyor 2, so the conveyed article 1 will not be damaged. definitely decreased.

In addition, in the case of a conveyed article 1 that is stable in the conveyed state, in the conventional technology, it was received by the reversing arm 5, and even if the reversing arm 5 was swung to a substantially horizontal position in the conveying direction, the conveyed article 1 would not be reversed. In this case, near the exit side of the conveyor 2 in the conveyance direction, the conveyed article is detected by the position detection means 3, and is pushed up by the operation of the reversing auxiliary means 4 activated by the detection signal, and is tilted in the conveyance direction. Since the conveyed article is rotated and dropped from the conveyor 2, the state of the conveyed article when it is received by the reversing arm 5 is as follows.In the conventional technology, the surface of the conveyed article 1 facing the conveyor 2 is in the receiving claw 5.
6 side, the transport direction side of the transported item 1 is already facing the swinging center side of the reversing arm 5, and the transport direction side is already facing the free end side. In other words, the surface of the transported product 1 facing the conveyor 2 has already been rotated by 90 degrees or more with respect to the transport direction compared to the time of receiving in the conventional technology. Therefore, the conveyed article 1 in this state has already been reversed just by the downward swing of the reversing arm 5, without even having to roll over on the reversing arm 5.

Therefore, according to the present invention, even if the conveyed article 1 rolls over, it is supported on the conveyor and does not turn over, so the occurrence of damage can be reduced, and the conveyed article 1 is stabilized and
We were able to realize a transport and reversal device for plastic molded products that can easily reverse the transported product regardless of instability.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the present invention, FIG. 2 is a side view of the present invention, FIG. 3 is a front view of the present invention, FIG. 4 is a perspective view showing an example of the overall shape of the bumper, and FIGS. Figure B is a side sectional view showing an example of the cross-sectional shape of the bumper;
FIG. 6 is a plan view of the conventional technique, FIG. 7 is a side view of the conventional technique, and FIG. 8 is a partial front view of the conventional technique. 1... Bumper, 2... Conveyor, 3, 3a...
...Phototube, 4...Kitsuka, 5...Reversal arm,
6... Holding body, 7... Support frame, 8... Conveyor frame, 9... Head pulley, 10... Tail pulley, 11... Universal joint, 12...
... Sprocket, 13 ... Geared motor, 14
...Chain, 15 ...Kitsuka cylinder, 16
...Reversing cylinder, 17... Fall prevention shelf.

Claims (1)

[Scope of utility model registration request] A plurality of conveyors that operate synchronously and whose total width in the direction orthogonal to the conveyance method of the conveyed article is approximately equal to or greater than the length of the conveyed article, and above the conveyor near the conveyed article exit side of the conveyor. a position detecting means for detecting the position of the conveyed article to be placed; a reversing auxiliary means provided between the plurality of conveyors for overturning the conveyed article that has been conveyed to the corresponding position in the conveying direction; It is installed on the conveying direction side with the swing center below the conveyor near the product exit side.
A swingable reversing arm that receives a conveyed item on the upper side and swings downward between a position above and below a position horizontal to the swing center; and a swinging of the reversing arm. A method for transporting and transporting plastic molded products, characterized in that it is comprised of clamping bodies that are provided on the center side and the free end side and hold the transported product received by the reversing arm while it is being swung downwards. Reversing device.