JPH0447647Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application The present invention is for inspecting whether or not there are holes or the like in a lid such as a cap used to seal the mouth of a bottle that may interfere with the sealing action. The present invention relates to a negative pressure suction inspection device, and particularly to a negative pressure suction inspection device suitable for inspecting lightweight lids.

Prior Art Taking a conventional negative pressure suction inspection device for inspecting whether or not a liner provided on a crown for sealing a bottle mouth is normal or not, a conventional example is described based on FIGS. 3 and 4. Explain.

As shown in FIG. 3, the suction head 2 has a suction pipe 1 connected to a negative pressure generator (not shown).
It is connected to a drive device such as a hydraulic cylinder (not shown) and is supported so as to be able to move up and down within a predetermined range. On the other hand, a crown 4 having a liner 3 provided on its inner surface, which is the object to be inspected, is placed on a suitable support table 5 while being attracted to a magnet 6. Then, at the bottom dead center of the suction head 2, the lower surface of the suction head 2 and the liner 3 come into contact with each other, and a closed space is formed between them.
When the suction head 2 is at its top dead center, the lower surface of the suction head 2 is located above the crown 4. In addition, in the vicinity of the top dead center, a taking-in device is provided which is arbitrarily displaced to the falling point of the crown 4 in order to take in the crown 4. That is, at this top dead center, the suction head 2 and the liner 3 are forcibly released from their contact with each other, and the crown 4 is fed into the intake device.

Once the above-mentioned closed space is formed, a suction force is applied via the suction tube 1 by the negative pressure generator.
Here, if the closed space is in a normal closed state, the inside of the closed space becomes a negative pressure state, the crown 4 is sucked by the suction head 2 with a predetermined suction force, and when the suction head 2 rises, the fourth As shown by the solid line in the figure, the crown 4 also rises together with the suction head 2 against the attraction force of the magnet 6. On the other hand, if the closed space is in an abnormal state such as a hole existing in the liner 3, even if the suction force described above is applied, a sufficient negative pressure will not be achieved, so the predetermined suction force will not be generated, and the suction head 2 Even if the crown 4 rises, the magnet 6 remains on the support table 5 as shown in the phantom line in FIG.
When an abnormal condition is detected, the product is removed from the support table 5 as a defective product by a separately provided removal device.

Here, the action of the magnet 6 will be explained in more detail. Since the crown 4 is light, there is a problem that if the above-mentioned suction force is strong, even if there is an abnormality in the liner 3, the crown 4 will be suctioned by the suction head 2 and rise together. If the force is weakened, there is a problem in that it becomes difficult to control. In order to solve these problems, a magnet 6 is conventionally provided, and when the liner 3 is formed normally and a suction force stronger than the suction force of the magnet 6 acts on the crown 4, Only the crown 4 is made to rise together with the suction head 2, and if there is an abnormality in the liner 3, the suction force of the magnet 6 will prevent the crown 4 from rising even if suction force is applied.

Problems to be Solved by the Invention However, with the conventional negative pressure suction inspection device described above, there is no problem when the lid is made of a magnetic material like the crown 4, but when the lid is made of a non-magnetic material, the magnet 6 cannot be used. Therefore, it has the disadvantage that it cannot be used as a lightweight lid made of a non-magnetic material, such as a cap for sealing the mouth of an aluminum bottle.

An object of the present invention is to provide a negative pressure suction inspection device that eliminates such drawbacks.

Means for Solving the Problem The suction head is attached to an aluminum cap provided with a liner for sealing the lid body, for example the mouth of the bottle, in its lowered position, for example, the bottom dead center, and a closed space is created between the liner and the aluminum cap. On the other hand, at the raised position, for example, top dead center, it is supported so as to be able to rise and fall to release the abutting state, and is connected to a negative pressure generator to generate a negative pressure inside the closed space. a biasing body configured to raise the liner of the cap by suction when the liner is in a pressurized state, and to apply a biasing force from above the cap to resist the rise of the cap; For example, a weight ring is provided that is slidably fitted to the suction head so as to be locked to the upper end of the opening edge of the cap.

Function: When the suction head suctions the cap, which is the lid body, and moves up, the biasing body that biases the cap downward is provided so that the biasing force acts on the upper end of the opening edge of the cap. Only when the suction force is stronger than the biasing force of the biasing body, the cap will rise together with the suction head, and if there is an abnormality in the liner of the cap, the cap will be prevented from rising by the biasing force of the biasing body. At the same time, it can also be applied when the cap is made of non-magnetic material. Furthermore, when the suction head is inserted inside the cap and its lower surface is brought into contact with the liner, the biasing body naturally engages with the opening edge of the lid, so that the biasing body can be attached simply by raising and lowering the suction head. No special mechanism is required to apply force to the lid from above.

Embodiment Hereinafter, a preferred embodiment in which the present invention is applied to a pilfer-proof cap (hereinafter referred to as PP cap) for closing the mouth of a bottle will be explained in detail based on FIGS. 1 and 2 of the attached drawings. Explain.

Here, in Figure 1, the suction head is the lid.
FIG. 2 is a schematic vertical cross-sectional view of the main part showing the state in which it is in contact with the liner of the PP cap, and FIG. 2 is a schematic side view of the entire device.

As shown in FIG. 2, a suction head 11, which has a suction pipe 10 extending longitudinally through the suction head 11, is connected to a hydraulic cylinder 12 and is supported so as to be able to rise and fall freely, and can exert suction force on its lower surface. As such, the suction pipe 10 is connected to a negative pressure generator 13. Further, on the outer peripheral surface of the suction head 11,
A guide groove 14 is bored so as to extend in the circumferential direction, and a weight ring 15 serving as a biasing body is fitted into the guide groove 14 so as to be slidable in the vertical direction.

As shown in FIG. 1, at the position where the suction head 11 has descended to the bottom dead center, the support table 1
PP, which is the object to be inspected, is placed at a predetermined position on 6.
The lower surface of the suction head 11 is configured to abut against the upper end surface of a liner 18 formed within the cap 17 so as to form a closed space between this lower surface and the liner 18. In this state,
The weight ring 15 is located at the top of the guide groove 14 and is engaged with the opening edge of the PP cap 17.
It is configured to apply a pressing force to the PP cap 17 from above using its own weight. Further, when the suction head 11 rises to the top dead center, its lower surface is positioned above the PP cap 17. Further, when the suction head 11 is at the top dead center, the lower surface of the suction head 11 is configured to be located above the cap 17, and near the top dead center there is a PP cap to take in the PP cap 17. A capture device is provided for displacing the cap 17 between the drop point and other positions as required. That is, at this top dead center, the suction head 11 and the liner 18 are forcibly released from their contact with each other, and the PP cap 17 is fed into the intake device. Furthermore, a removal device is provided near the support table 16 for removing the PP cap 17 and sending it into a predetermined storage section.

In addition, on the support table 16 mentioned above,
To position the PP cap 17, use the support table 1.
This is done using a recess formed in 6 or an appropriate gripping member.

Since the present embodiment is constructed as described above, when the suction head 11 is lowered to the bottom dead center by the driving force of the hydraulic cylinder 12 with respect to the PP cap 17 placed at a predetermined position on the support table 16, As shown in FIG. 1, the lower surface of the suction head 11 comes into contact with the upper end surface of the liner 18 of the PP cap 17, forming a closed space. Here, the negative pressure generator 13 is driven, and suction force is applied to the suction tube 10 of the suction head 11. Subsequently, the suction head 11 is raised to the top dead center by the driving force of the hydraulic cylinder 12, but the liner 18
If the suction head 11 is formed normally, the inside of the closed space becomes a negative pressure state, and the suction head 11
The PP cap 11 is attracted and raised against the biasing force due to its own weight. On the other hand, the liner 1
If there is an abnormality such as the presence of a hole in the weight ring 15, the inside of the aforementioned closed space will not be in a sufficient negative pressure state, and even if a suction force is applied, the biasing force due to the weight of the weight ring 15 will cause the PP The cap 17 is prevented from rising together with the suction head 11 and an abnormal condition is detected. Defective products whose abnormal state is detected by remaining on the support table 16 are removed to the storage section.

Note that the present invention is not limited to the above-mentioned embodiments; for example, the lid body is not limited to the PP cap 17, and the biasing body may utilize the pressure of the elastic force of a spring in addition to the weight ring 15. It is possible to make many modifications.

Effects As is clear from the above explanation, according to the present invention, by providing a biasing body to apply a biasing force from above the lid, a lightweight material can be used regardless of whether the material is magnetic or non-magnetic. Not only does it enable reliable negative pressure suction inspection of the lid, but since the biasing body is provided on the side of the suction head, the suction head can be inserted inside the lid and its underside against the liner. Since it automatically locks onto the opening edge of the lid when making contact, there is no need for any special configuration to apply the biasing force to the lid from above, and the initial stage can be easily initialized by simply raising and lowering the suction head. This can have the beneficial effect of achieving the objectives of

[Brief explanation of the drawing]

Figure 1 is a schematic vertical cross-sectional view of the main parts of a preferred embodiment of the present invention, showing the state in which the suction head, which is the object to be detected, is in contact with the liner of the PP cap, which is the object to be inspected, and Figure 2 is the entire device as well. FIG. 3 is a partial cross-sectional view of the main part of the conventional suction head showing the lowered state, and FIG. 4 is a partial cross-sectional view of the main part showing the suction head of the conventional example in the raised state. 10... Suction tube, 11... Suction head, 12...
...Hydraulic cylinder, 13... Negative pressure generator, 14...
... Guide groove, 15 ... Weight ring, 16 ... Support table, 17 ... PP cap, 18 ... Liner.

Claims (1)

[Scope of utility model registration request] A suction head that can be inserted into the inside of the opening edge of a lid having an opening edge and a liner inside the opening edge, and has a lower surface that can come into contact with the upper end surface of the liner, is configured such that the opening edge is in the lowered position. The lid body is brought into contact with the liner placed so as to face upward so as to form a closed space, while in the raised position, it is supported so as to be able to rise and fall to release the contact state, and In the negative pressure suction inspection device, the device is connected to a negative pressure generating device to create a negative pressure state in the closed space, and when the liner of the lid body is normal, the liner of the lid body is suctioned and raised. A biasing body for applying a biasing force from above the lid body against the upward movement of the suction head is provided on a side of the suction head so as to be able to be engaged with the opening edge of the lid body. Negative pressure suction inspection device.