JPH086277Y2 - Can lid perforator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a can lid perforation inspection device for detecting defects such as perforation of a can lid.

[Prior Art] Usually, in a can manufacturing process, various quality inspections are performed on a circular can lid manufactured as an upper lid of a can. Among the quality inspection of the can lid, as a method for inspecting the can lid for defects such as holes, there is a method in which the can lid is housed in a sealed state and air is supplied at a predetermined pressure from the lower side of the can lid. Are known.

The apparatus shown in FIG. 2 shows an example thereof, and is roughly composed of a lower closing member 2 and an upper closing member 3 for housing a can lid 1 in a sealed state, and a plurality of can lids are continuously inspected. A plurality of devices shown in FIG.

The lower closing member 2 is a container-shaped member having a circular mounting portion 4 formed in the center thereof so that the can lid 1 is mounted horizontally, Has a hole 5 communicating with the back surface. Then, this lower closing member 2
Is fixed on a device stand 7 in which holes 6 for air supply are formed with holes 5 and 6 corresponding to each other.

The upper closing member 3 is formed by hanging a protrusion 3a facing the peripheral edge 2a of the lower closing member 2 on the periphery of the disk member, and the protrusion 3a has an annular groove 3b. Is formed, and the O-ring 8 is mounted in the annular groove 3b. As a result, when the upper blocking member 3 is brought close to the lower blocking member 2, the O-ring 8 is interposed between the peripheral edge portions 2a and 3a, so that the inside is airtight.
An annular groove 3d is also formed on the upper surface 3c of the upper blocking member 3 close to the protrusion 3a, and the O-ring 9 is attached to the upper surface 3c.

In addition, a through hole 10 that opens in the vertical direction is formed on the axis of the upper blocking member 3, and the diameter of the lower side of this through hole is set to be larger than the diameter of the upper side thereof. A knockout engaging portion 11 with which the knockout member 13 is engaged is formed. A hollow tube 12 is fixed to the upper opening side of the through hole 10, and the hollow tube 12 has a knockout member.
13 has been inserted.

The knockout member 13 includes a tubular insertion portion 13a having the same diameter as the inner diameters of the through hole 10 and the hollow tube 12, and the insertion portion 1
3a and a ring-shaped contact portion 13b having a diameter larger than the outer peripheral diameter of the insertion portion 13a formed continuously at the lower end of the insertion portion 13a.
A bolt hole 13c that opens in the vertical direction is formed in the upper part of the. Then, the knockout portion 13 passes through the through hole 10, the insertion portion 13a is inserted into the intermediate space 12, and the contact portion 13b is brought into contact with the knockout engagement portion 11, and the mounting bolt
The upper closing member 3 is fixed by inserting 14 from the lower side into the bolt hole 13c and tightening the bolt engaging portion of the upper closing member 3 (not shown) with a hexagon wrench or the like. As a result, the bottom surface of the contact portion 13b has the can lid 1 housed inside.
It comes in contact with the upper surface of the. The reference numeral 15 is
The spring member is provided so as to press the knockout member 13 downward.

In order to inspect the perforation of the can lid using the inspection device having the above-mentioned configuration, first, the can lid 1 is in a state in which the connecting portion 1a thereof is brought into contact with the upper surface of the peripheral edge portion 2a of the lower closing member 2. Then, it is placed on the placing section 4. Next, the upper blocking member 3 is hung down so that the peripheral edge portions 2a, 3
a) The O-ring 8 is interposed between the two so that they come close to each other. Thereby, the can lid 1 is housed in a hermetically sealed state so that the space 4a on the upper surface side and the space 4b on the lower surface side of the can lid 1 are separated from each other by the can lid 1 itself. Then, air is supplied from the air supply hole 6 by an external supply device to supply air of a predetermined pressure to the space 4b on the lower surface side of the can lid 1, and a change in pressure in the space 4b on the lower surface side is detected by a detection means (not shown). Detect. Thereby, when the value of the detecting means is lowered, a defect such as a hole in the can lid 1 is detected.

[Problems to be Solved by the Invention] By the way, there are various types of can lids 1 to be inspected, such as those having a flat top surface as shown in FIG. is there. Therefore, in order to prevent the can lid 1 from being deformed by the air supply from the lower side at the time of inspection, a predetermined contact portion height H ₁ corresponding to the shape of the can lid ₁
The knock-out member 13 having a must be mounted on the upper closure member 3.

However, when replacing the knockout member 13,
Since it is necessary to loosen the mounting bolts 14 using a hexagon wrench to carry out the attachment / detachment work, a lot of labor and time are spent for the replacement work, and there is a problem that the work efficiency is extremely poor.

The present invention has been made in view of the above circumstances, and an object thereof is to be able to immediately cope with can lids of various shapes to be inspected and to significantly increase work efficiency. An object of the present invention is to provide a can lid perforation inspection device.

[Means for Solving the Problems] In the can lid perforation inspection apparatus according to the present invention, the can lid is such that the space between the upper side of the can lid and the lower side of the can lid is separated from each other by the can lid itself. Is housed in a closed state by an upper closing member and a lower closing member, air is supplied to the lower surface side of the can lid to increase the internal pressure, and a knockout member supported by the upper closing member is attached to the can lid. In a device that abuts the upper surface of the can lid to maintain its shape and inspects the can lid for perforation, the knockout member is detachable from the knockout body supported by the upper closing member. It is characterized in that it is a spacer member that is fitted to and contacts the upper surface of the can lid.

[Operation] According to the can lid perforation inspection device of the present invention, even when inspecting can lids of different shapes, the spacer member fitted to the knockout body is pulled out and a new spacer member is attached. By simply inserting it into the knockout body, it is possible to easily and quickly replace the spacer member that abuts the upper surface of the can lid of various shapes.

[Embodiment] An embodiment of the can lid perforation inspection device according to the present invention will be described with reference to FIG. It should be noted that the same components as those of the above-mentioned conventional example are designated by the same reference numerals and the description thereof will be omitted.

The feature of the can lid perforation inspection device of the present invention is that the knockout member 13 shown in FIG.
The spacer member (21) is detachably fitted to and is in contact with the upper surface of the can lid.

The knockout main body 20 is a ring-shaped engagement portion 20 that engages with a tubular insertion portion 20a that is inserted into the hollow can 12 and a knockout engagement portion 11 that is formed continuously at the lower end of the insertion portion 20a.
It is composed of b and. The knockout body 20 is fixed to the upper closing member 3 by inserting the mounting bolt 14 from the lower side into the bolt hole 20c formed in the upper portion of the insertion portion 20a and tightening it with a hexagon wrench.

The spacer member 21 is made of MC nylon or the like, and has a cylindrical fitting portion 21a having a diameter substantially the same as the diameter of the opening hole 20d of the knockout body 20, and a can lid at the lower end of the fitting portion 21a. An abutting portion 21b that abuts the upper surface of the fitting 1 is integrally formed, and a groove 21c is formed in the circumferential direction of the outer periphery of the fitting portion 21a, and an O-ring 22 is mounted in this groove. The abutting portion 21b of the spacer member 21 is prepared to have several heights H ₂ so as to be compatible with various can lid shapes. The spacer member 21 has the fitting portion 21a in the opening hole 20d of the knockout body 20 and the O-ring 22.
It is fitted while deforming and improving adhesion.

When the can lid is inspected using the inspection device having the knockout main body 20 and the spacer member 21 having the above-described configuration, and when the can lid 1 having a different shape is inspected, the used spacer member 21 is replaced with the knockout main body 20. It suffices to pull it out and insert a new spacer member 21 corresponding to the shape of the can lid 1 to be inspected into the knockout main body 20.

Thus, even when inspecting the can lids 1 having different shapes, the spacer member 21 detachably fitted to the knockout main body 20 supported by the upper closing member 2 is pulled out, and a new spacer is added. Since the one-touch type spacer member 21 is simply replaced by inserting the member 21, a lot of labor and time are not required for the conventional replacement work of the knockout member 13, and the work efficiency can be significantly increased.

In addition, because the inspection preparation operation is shortened,
It is possible to efficiently perform a perforation inspection of the can lid in a short time.

[Effects of the Invention] As described above, according to the can lid perforation inspection device of the present invention, the spacer member that comes into contact with the upper surface of the can lid is detachably attached to the knockout body supported by the upper closing member. Since it has a mated structure, even when inspecting can lids of different shapes, it is easy to pull out the fitted spacer member from the knockout body and insert a new spacer member. Further, since the spacer member can be replaced promptly, the work efficiency can be greatly increased, and further, the can lid perforation inspection can be efficiently performed.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a can lid perforation inspection apparatus of the present invention, and FIG. 2 is a sectional view showing a conventional can lid perforation inspection apparatus. 1 ... Can lid, 2 ... Lower closing member, 3 ... Upper closing member, 4a ... Space on upper surface of can lid, 4b ... Space on lower surface of can lid, 5 ... Lower closing member Air supply hole of 8,9,22 ……
O-ring, 13 …… Knockout member, 20 …… Knockout body, 21 …… Spacer member.

Claims (1)

[Scope of utility model registration request] 1. A can lid is housed in a sealed state by an upper closing member and a lower closing member so that a space between an upper surface side of the can lid and a lower surface side of the can lid is separated from each other by the can lid itself. Air is supplied to the lower surface of the can lid to increase the internal pressure, and the knockout member supported by the upper closing member is brought into contact with the upper surface of the can lid so as to maintain the shape of the can lid. In a device for inspecting perforation, the knockout member is a knockout body supported by an upper closing member, and a spacer member detachably fitted to the knockout body and abutting on an upper surface of a can lid. A can lid perforation inspection device.