JPH0431980B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an apparatus for separating trays one by one that are stacked in a fitted state at uneven portions.

[Prior Art] When a product such as a lens is transported, a tray-shaped plastic molded product with cushioning properties as shown in Fig. 5 is used to protect the product from vibrations or external shocks that occur during transport. T (sometimes referred to herein as a tray) may be used. This type of molded product is usually made of a thermoplastic sheet such as a vinyl chloride sheet or a polyethylene sheet, and is made by vacuum forming or pressure forming to form a recess W into which the product is inserted, and ribs and flanges that provide rigidity to the tray. etc. are formed all at once. During the manufacturing process, such molded products are piled up and stored while still being heated, or cut to a certain size.
The trees are handled in such a way that they are cut in groups of 10 or so.

However, stacked molded products are easily deformed because they are thin, and they overlap irregularly, and the grooves or uneven parts caused by molding fit together, so a claw metal fitting is used to separate the molded products one by one. It was difficult to insert the pads, and even if you pulled them up using the suction pad, they remained stuck and two or three sheets were pulled up at the same time. For this reason, the only way to separate such molded products one by one is by hand, which impairs work efficiency.Therefore, it has been desired to develop a device that can automatically handle this work.

[Object of the Invention] The object of the present invention is to improve the above-mentioned drawbacks of the prior art and to provide a device that can rationally separate stacked molded products. .

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a device for separating trays one by one that are stacked in a fitted state on a concave and convex portion. A presser foot is formed at the lower part of the rotation shaft, and a pair of left and right support arms are rotatably attached to both sides of the rotation shaft, and near the tips of each of the support arms, A mounting shaft for a suction pad is provided, and the suction pad is mounted so that it can swing left and right about the mounting shaft as the support arms rotate, and can be vertically raised and lowered above the support arms. A pivot joint is provided, a link is installed between the pivot joint and the support arms, and the pivot joint is connected to a piston rod of an actuating cylinder mounted on a base, and the base has a lifting mechanism. We propose a device for separating stacked trays, which is characterized in that the trays are held movably up and down. In addition, the second invention of the present invention is a device for separating trays one by one that are stacked in a fitted state on a concavo-convex portion, a rotating shaft is provided at the lower part of the base, and a presser foot is formed at the lower part of the rotating shaft. A pair of left and right support arms are rotatably mounted on both sides of the rotation shaft, and a cam mechanism for tilting the suction pad is provided near each tip of both support arms, so that the suction pad can be rotated. The support arms are mounted so as to be movable in the longitudinal direction by the cam mechanism as the support arms rotate, and a pivot part that can move up and down in the vertical direction is provided above the support arms, and the pivot part and said support arms, and said pivot part is connected to a piston rod of an operating cylinder mounted on a base, and said base is held by a lifting mechanism so as to be able to rise and fall freely. It is something to do.

According to the present invention, the trays T, which are stacked as shown in FIG. 4 and are equipped with tapered product insertion portions W that fit together and are difficult to separate, can also have their outer edges adsorbed with a vacuum pad. If you pull it up, you can easily pull one tray apart. A more desirable method is to stack the trays T upside down as shown in FIG. 1, and while holding down the center of the tray, pull up the outer edge with a pad. In this case, the friction at the product insertion portion of the tray is minimized, and separation becomes easier than when the trays are stacked upright.

Further, when the tray is pulled up by the suction pad, it is desirable that the tray be curved into a substantially circular shape. For this purpose, it is necessary for the suction pad to draw a trajectory based on the involute curve. As a result, when the trays are separated, the trays curve smoothly and are pulled apart uniformly, so that friction caused by forced contact between the trays can be kept to a minimum.

[Example] Hereinafter, the present invention will be specifically described based on an example shown in the drawings. In FIGS. 1 and 2, reference numeral 1 denotes a machine frame of the present apparatus, 2 a guide groove formed vertically in the front of the machine frame 1, and 3 a base mounted on the guide groove 2 so as to be movable up and down. As shown in FIG. 1, this base 3 is supported by a pair of left and right guide columns 4, 4 vertically installed on the machine frame 1, and is connected to a piston rod 5' of an elevating cylinder 5 fixed to the machine frame 1. It is held so that it can slide vertically.

A rotating shaft 6 supported by a bearing 6' is installed in the lower part of the base 3, and a positioning presser foot 7 is provided protrudingly below the rotating shaft 6. A pair of support arms 8, 8, 9, 9 are rotatably attached to the rotation shaft 6 on both sides thereof, and near the tips of both support arms 8, 9 there is a structure as described below. The suction pads 10, 10 are attached so as to move upward along an arc having a radius of the support arms 8, 9. Further, above both support arms 8 and 9, a pivot portion 11 that can be vertically moved up and down is provided.
Links 12, 12 are installed between the pivot portion 11 and both support arms 8, 9. Both links 12,
The slide holder 1 is loosely inserted into the pilot bars 13, 13 which are firmly installed on the base 3.
It is pivoted on 4. The slide holder 14 is
It is configured to be able to move up and down by a piston rod 15' of an operating cylinder 15 attached to the upper part of the base 3. With the above configuration, the slide holder 14 moves up and down as the piston rod 15' expands and contracts, and when the holder goes up and down, both links 12,
Both support arms 8 and 9 perform a tilting movement about the rotation axis 6 via the support arms 12.

Attachment shafts 16, 16 for suction pads are installed near the tips of both support arms 8, 9 so as to cross the arms and connect the pair of support arms. This mounting shaft 1
6 and 16 are installed parallel to the rotating shaft 6, and the mounting rod 18 of the suction pads 10 and 10 swings left and right about the mounting shaft 16 in a shaft cylinder 17 that is loosely inserted into both ends of this mounting shaft. installed as possible.
Balance springs 19 and 20 are stretched between the tail of the mounting rod 18 and the support arms 8 and 9, and the springs apply a certain degree of restraining force to the mounting rod 18, giving it independence. are doing. Reference numeral 21 is a coiled pipe connected to a pressure reducing device (not shown), which applies negative pressure to the suction pad through an air hole formed in the mounting rod 18.

The structure of the adsorption device shown in FIGS. 1 and 2 is as described above, and its operation will be explained below. Now, a plurality of stacked trays T are placed on the stocker S in an upright state as shown in FIG. 4 or in an upside-down state as shown in FIG. 3, and then set below the apparatus.

Next, the base 3 is lifted upward by driving the cylinder 5, and both support arms 8, 9 are further moved by the operating cylinder 15.
supported in a horizontal position. And suction pad 10,
The ten mounting rods 18 are set in a substantially vertical state so as to be positioned on the outer edge of the trays T stacked upside down, for example, as shown in FIG.

Next, the operating cylinder 15 is driven to move the slide holder 14 downward, and the suction pads 10, 10 are pressed against the outer edge of the tray T so as to be directly opposed to each other. In this state, negative pressure is applied to the suction pad 10 to remove the tray T.
At the same time, the presser foot 7 holds down approximately the center of the tray so as not to apply an excessive load to the tray. In this case, since the pipe 21 is telescopically attached, this allows the suction pad 1 to
0 and 10 can freely shake their heads.

Next, while holding down the center of the tray with the presser foot 7, the operating cylinder 15 is driven to move the pivot point 11 upward, and both links 12 and 12 move both support arms 8 and 9 as shown in FIG. It is rotated upward about the rotation shaft 6 as a fulcrum. Therefore, the suction pad 10,1
0 lifts the tray T upward with suction,
The tray gradually rises from its outer edge until the tray T
Curve it as shown in the figure. During this process, a force acts on the suction pads 10, 10 to try to slide them inward of the support arms 8, 9, and the elasticity of the springs 19, 20 allows them to be adjusted to arbitrary positions while maintaining balance. In this state, the tray T gradually separates from the edge of the stacked lower trays T,
As the fitting parts of the upper and lower trays (product insertion part W) move away one by one (see Figure 3),
No excessive force is used. When the presser foot 7 is approximately released, the cylinder 5 is operated to raise the base 3, thereby raising the presser foot 7. Therefore, the tray T also rises and becomes ready for transport. In this state, for example, the entire machine frame 1 is moved laterally, or a suitable conveyance device is inserted under the tray T, the suction force of the suction pad is cut off, and the tray is loaded onto the conveyance device.

FIG. 6 is a partially enlarged view showing another embodiment of the present invention, in which the following configuration is adopted so that the upward locus of the suction pad draws an involute curve with the preset curved line of the tray as the base circle. Suction pad 1 including a sliding member 22 and a guide plate 24
0 shows the tilting cam mechanism. In this case, the attachment shaft 18 of the suction pad 10 is attached to a sliding member 22 having a guide pin 23 so as to be able to freely slide on the support arms 8 and 9 in the longitudinal direction. Cam groove 2 provided in
5 is fitted. The guide plate 24 is the machine frame 1
The cam groove 25 is formed of an involute curve with the curved line of the tray as a base circle. The suction pad 10 moves along this curve while adsorbing the tray T, so that the tray T
separates while maintaining its circular curvature, so
The tray can be pulled away smoothly without applying excessive force to the suction surface.

[Effects of the Invention] As described above, according to the apparatus of the present invention, when separating trays one by one that are stacked in a fitted state at the uneven portion, the central point of the stacked trays is pressed with a presser foot. When the pair of left and right support arms are rotated upward while the outer edge of the uppermost tray is suctioned and held by the suction pad, the outer edge of the uppermost tray suctioned and held by the pads is attached to the outer edge of the lower tray stack. The tray is gradually lifted up from the outer edge of the tray, and almost the entire area of the tray from the outer edge of the tray to the center of the tray can be greatly curved upward. Therefore,
It is possible to smoothly remove the mated parts that are in a mated state with uneven parts and are difficult to peel off from the outer edge to the center of the tray, making it easy to separate each tray individually and without having to do it manually. It has the effect of being able to do it automatically.

[Brief explanation of drawings]

Figure 1 is a front view of an apparatus for carrying out the present invention;
The figure is a side view of the same as above, Figures 3 and 4 are explanatory diagrams showing how stacked trays are separated, Figure 5 is a perspective view of the tray to which the present invention is applied, and Figure 6 is a diagram of the apparatus of the present invention. FIG. 7 is a partially enlarged view showing another embodiment. T...tray (molded product), W...product insertion part, 1...
Machine frame, 2... Guide groove, 3... Base, 4... Guide column, 5... Cylinder, 6... Rotating shaft, 7... Presser foot,
8, 9... Support arm, 10... Adsorption pad, 11... Pivot joint, 12... Link, 13... Pilot bar, 14
...Slide holder, 15...Operating cylinder, 16
...Mounting shaft, 17...Shaft cylinder, 18...Mounting rod, 1
9, 20...Spring, 21...Pipe, 22...Sliding member, 23...Pin, 24...Guide plate, 2
5...Cam groove.

Claims (1)

[Claims] 1. In a device for separating trays one by one that are stacked in a fitted state on a concave and convex portion, a rotating shaft 6 is provided at the bottom of a base 3.
A presser foot 7 is formed at the lower part of the rotation shaft 6, and a pair of left and right support arms 8, 9 are rotatably attached to the rotation shaft 6 on both sides thereof.
A mounting shaft 16 for the suction pad 10 is provided near each tip of the support arms 8 and 9, and as the support arms 8 and 9 rotate, the suction pad 10 is mounted on the mounting shaft 16.
It is attached so that it can swing left and right about the support arms 8 and 9, and a pivot part 11 that can move up and down in the vertical direction is provided above both the support arms 8 and 9, and the pivot part 11 and the support arms 8, Links 12, 12 are installed between the base 3 and the base 3, and the pivot portion 11 is connected to the piston rod of the actuating cylinder 15 mounted on the base 3, and the base 3 is held by the lifting mechanism 5 so as to be able to rise and fall freely. A device for separating stacked trays. 2 In a device that separates trays one by one that are stacked in a mated state on an uneven surface, a rotating shaft 6 is installed at the bottom of the base 3.
A presser foot 7 is formed at the lower part of the rotation shaft 6, and a pair of left and right support arms 8, 9 are rotatably attached to the rotation shaft 6 on both sides thereof.
A cam mechanism for tilting the suction pad 10 is provided near each tip of the support arms 8 and 9, and the suction pad 1
0 is mounted so that it can be moved in the longitudinal direction of both the support arms 8, 9 by the cam mechanism as the support arms 8, 9 rotate, and further vertically raised and lowered above the support arms 8, 9. A pivotable joint 11 is provided, and links 12, 12 are installed between the pivotable joint 11 and the support arms 8, 9.
is connected to a piston rod of an operating cylinder 15 mounted on a base 3, and the base 3 is connected to a lifting mechanism 5.
A device for separating stacked trays, characterized in that the trays are held movably up and down.