JPS63150641A - Detector for pinhole or the like - Google Patents

Abstract

PURPOSE:To detect excellently the projection member fitting part of an enclosed container regardless of the direction of the projection part by providing plural rotatably probe members which have high-voltage electrodes arranged radially. CONSTITUTION:Plastic bolts 8 to be inspected are mounted on a support arm 7 in order and then carried. When a hook 9 fitted to a bolt 8 is almost horizontal, stylus electrodes 16 and 17 of high-voltage electrodes 10 and 11 touch the fitting part to inspect whether or not there is a pinhole. Further, when the hook 9 reaches the high-voltage electrodes 10 and 11 almost in the vertical direction, the stylus electrodes 16a and 17a touch its front surface to perform detection. Then the stylus electrodes 16a and 17a are pushed by the hook 9, so the high-voltage electrodes 10 and 11 rotate around shafts 12 and 13 and stylus electrodes 16b and 17b touch the rear surface of the hook 9 to inspect the fitting part of the hook 9 over nearly the entire area.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a pin for detecting pinholes, etc. in a predetermined portion of the sealed container by transporting the sealed container supported by a ground electrode and passing it between high voltage electrodes. This invention relates to a detection device for holes, etc.

Conventional Techniques and Two Points In the past, it was necessary to inspect plastic bottles with hooks for containing, for example, medicinal solutions, because if there were pinholes or the like, the contents could spoil.

At this time, it is relatively easy to inspect the periphery of the bottle, but
It is difficult to inspect parts and constrictions when hooks are attached, and pinholes are likely to occur in the hook attachment areas. . Therefore,
By using the above-mentioned type of detection device, for example, a pinhole inspection is performed on a portion of a hook-equipped plastic bottle containing a drug solution or the like when a hook is attached.

This type of conventional detection device includes a pair of high-voltage electrodes 51 and 52 made of leaf springs, as shown in FIG. On the other hand, the plastic bottle 53 to be inspected has a cylindrical shape, and a hook 54 made of a rectangular frame when viewed from FIG. 5 is attached to the bottom of the bottle. Then, the plastic bottle 53 is placed on a support that is a ground electrode 55, and the hook is attached to the plastic bottle 53 by transporting it so that the portion touches the high-voltage electrode and inspecting for pinholes and the like. At this time, if there is a pinhole, the current flowing from the high-voltage electrode to the ground electrode changes significantly, and the presence or absence of the pinhole can be detected thereby.

However, it is difficult to place the plastic bottle 53 on the ground electrode 55 while keeping the hook 54 in a constant direction, so when the bottle 53 reaches the high voltage electrode position, the hook 5
The direction of 4 is not determined. At this time, if the hook is oriented horizontally, good inspection results can be obtained since almost the entire area of the hook attachment section passes within the inspection range of the high-voltage electrodes 51 and 52 shown by diagonal lines in FIG. However, the closer the orientation of the hook 54 is to the vertical direction, the worse the detection accuracy becomes. For example, if the hook 54 reaches the high-voltage electrode 51, 52 in an almost vertical state as shown in FIG. You can do it. However, since the high-voltage electrode is made of a leaf spring, the high-voltage chrysanthemum returns to its original position as shown by the chain line in Figure 7(b) as soon as it leaves the plastic bottle, resulting in a short detection time on the back side in the transport direction. Very short. For this reason,
Even if there are pinholes etc. in the shaded areas.

There was a problem that this could not be detected.

As a method to solve this problem, it has been proposed to hold the hook in a predetermined direction, that is, in a substantially horizontal direction, and pass the hook between the high voltage electrodes. However, it is quite difficult to automatically orient all the hooks of plastic bottles horizontally, and even if it were possible, a new problem would arise in that the cost would increase considerably.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide a pinhole detection device that is simple, low-cost, and capable of consistently performing good inspections.

Means for Solving the Problems The present invention solves the above problems by providing a method in which each of the high-voltage electrodes has a plurality of probe members arranged radially around an axis substantially perpendicular to the conveying direction of the sealed container. This was achieved by making the probe member rotatable around the axis of the shaft.

Example Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a diagram schematically showing a pinhole detection device, in which reference numeral 1 indicates a supply section, 2 indicates an inspection section, and 3 indicates a discharge section. Near the tip of the supply section 1 and near the discharge section of the inspection section 2,
Sprockets 4 and 5 are provided, respectively, and an insulated chain 6 is wound around the sprockets 4 and 5, respectively.

A large number of support arms 7 for supporting plastic bottles 8 are attached to the chain 6, and these support arms 7 are configured as ground electrodes.

In the detection device configured as described above, plastic bottles 8 to be inspected are sequentially fed onto the support arm 7 by a transport device (not shown) at the distal end side of the supply section 1 . This plastic bottle 8 has a hook 9 attached to its bottom. The chain 6 is running in the direction of arrow A, and as the chain 6 runs, the plastic bottles 8 are sequentially transported to the inspection section 2.

This inspection section 2 is provided with opposing high voltage electrodes 10 and 11 as shown in FIG.
0.11 is provided with a base 14.15 which is rotatably mounted on a shaft 12.13 supported by the main body of the device. Then, needle electrodes 16.1 are arranged radially on this base 14°15.
A probe member configured as 7 is attached. In this case, the axial center of the shaft is arranged to be approximately perpendicular to the transport direction A of the plastic bottle 8. In addition,
The diameter and material of the needle electrodes 16.17 are set so that they are difficult to be elastically deformed, and the base portions 14.15 are constructed so as to be able to rotate around the axis 12.13 very smoothly.

As shown in Fig. 3, the detection device with this structure is similar to the conventional one, and if the hook is approximately horizontal, the needle electrode 16. The presence or absence of pinholes can be reliably inspected. Furthermore, when the hook 9 reaches the high voltage electrode 10.11 in an almost vertical direction as shown in FIG. 4(a), the needle electrodes L6a and 17a touch the front side as shown in FIG. 4(b). , and within the inspection range, pinholes can be detected.

At this time, the needle filpi1 of the high voltage electrode 10.11
6a and 17a are pushed by the hook 9, so the high voltage electrode 10
．． 11, its base 14.15 rotates around the axis 12.13, and as the needle electrodes 16b, 17b touch the rear side of the hook 9 and enter the inspection range (Fig. 4(C) )). Therefore, even if the hook 9 is in a vertical direction, the attachment of the hook 9 extends over almost the entire area of the needle electrode 16.1.
7 will be touched, and there will be almost no parts that cannot be inspected. Of the plastic bottles 8 that have been inspected, non-defective products without pinholes etc. are sent to the discharge section 3, and defective products with pinholes etc. are removed from the conveyance path by a removal device (not shown).

Thus, in the present invention, the hook 9 has the weight I & 16 a
.

When the hook 9 hits the needle electrode 17a, the high-voltage electrode 10.11 rotates independently, so the needle electrodes 16b and 17b that hit the hook 9 follow the back side thereof. Therefore, no matter which direction the hook 9 is tilted, the detection time can be extended, and stable and accurate inspection results can be obtained.

Although preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and can be modified in various ways. For example, the probe member is not limited to a needle electrode, but may also be an electrode made of an elongated thin plate, and an electrode made of a thin plate is particularly effective for inspecting the constriction of a bottle. Further, in the above embodiment, the base is rotatably mounted on the shaft, but the base may be fixed to the shaft and the shaft may be rotatably mounted on the main body of the device. Furthermore, the probe member can also be arranged directly on the rotatable shaft.

Note that the present invention is not limited to hooks for plastic bottles.
It is possible to detect pinholes, etc. in the attachment of protruding members to various sealed containers. In this case, the number and spacing of the probe members may be appropriately selected depending on the shape of the protruding member to be inspected.

Effects According to the present invention having the above-mentioned configuration, it is possible to successfully detect the attachment of a protruding member of a sealed container with almost no undetectable portions, regardless of the orientation of the protruding portion. Furthermore, the configuration is simple and can be provided at low cost.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an example of the detection device of the present invention, and FIG.
The figure is an explanatory diagram of its main parts, Figure 3 is an explanatory diagram of the high voltage electrode when the hook is oriented almost horizontally, and Figure 4 (a)
, (b), and (c) are explanatory diagrams sequentially explaining the movement of the high-voltage electrode when the hook is almost vertical, FIG. 5 is an explanatory diagram showing the high-voltage electrode part of the conventional detection device, and FIG. 6 is the conventional FIGS. 7A and 7B are explanatory diagrams showing another detection mode of the conventional detection device. FIGS. 7. Support arm 8. Plastic bottle 9.
・Hook 1o...High voltage electrode 12.13...Shaft 14,15...Base 16.17...Needle probe

Claims (3)

[Claims] (1) In a pinhole detection device that detects a pinhole or the like in a predetermined portion of the sealed container by transporting the sealed container supported by a ground electrode and passing it between high voltage electrodes, each of the high voltage electrodes , having a plurality of probe members arranged radially around an axis substantially perpendicular to the conveyance direction of the sealed container, the probe members being rotatable around the axis of the shaft; Detection device. (2) The detection device according to claim 1, wherein the probe member is provided on a base rotatably mounted on an axis substantially perpendicular to the direction of conveyance of the sealed container. (3) Claim 1, wherein the probe member is a needle electrode.
Detection device according to item 1 or 2.