JPH0439001B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a seaming micrometer for measuring the seaming height of a seaming portion where a can lid is seamed to a can body.

BACKGROUND ART Conventionally, a seaming micrometer as shown in FIG. 8 is known as a seaming micrometer for measuring seaming height.

The conventional seaming micrometer has an anvil 24 at the distal end of a frame 20 that has a semicircular cross section except for a base end 21 that fits and holds a spindle 23.
is set upright as shown in the figure, and the seaming height (usually referred to as seam height) of the can seaming part is measured by sandwiching the seaming height part of the can seaming part between the anvil 24 and the spindle 23. . In the figure, 25 is a thimble, 26 is a thimble scale, and 27 is a ratchet knob.

Problems to be Solved by the Invention In order to measure the seam height using the above-mentioned conventional seaming micrometer, as shown in FIG.
The micrometer is held perpendicular to the can C, the anvil 24 is placed against the lower end of the seaming height section SH, the spindle 23 is moved to sandwich the seaming height section between the two, and the seam height is measured.

However, in the case of so-called net-in cans, which have been increasing in number in recent years and have a seaming part that is narrower than the can body, there is no particular positioning element, so the micrometer can be adjusted exactly perpendicular to the can, that is, parallel to the can body axis. It is difficult to hold it, and as shown in the figure, it tends to tilt to either side, which tends to cause measurement errors. Therefore, it is difficult for even an expert to measure accurately, and furthermore, there is a problem in that it takes a long time.

The present invention was devised in view of the above-mentioned circumstances, and has an object to improve seam height measurement accuracy by easily and accurately holding a seaming micrometer parallel to the can body axis when measuring seam height. The purpose of this invention is to provide a seaming micrometer and its holder that can perform the following steps.

Means for Solving the Problems The present invention solves the above problems by employing the following configuration that enables vertical positioning by bringing a part of the seaming micrometer into contact with the can body during measurement. This solves the problem.

That is, the seaming micrometer of the invention of the present application is a seaming micrometer that measures the seam height by sandwiching the seam height portion of a can to be measured between a spindle and an anvil. The structure is characterized in that it has a holder portion provided with a can body contact member that contacts the can body of the measurement can.

The can body contact member can be applied to cans with different neck dimensions by preparing a plurality of can body contact members with different thicknesses and allowing them to be replaced depending on the type of can.

Function When measuring seam height, select the thickness of the can body contact member and attach it to the holder so that the seaming micrometer will be parallel to the can body axis when the can body contact member is brought into contact with the can body. . As a result, the micrometer can be accurately held in the axial direction of the can body simply by bringing the can body contact member into contact with the can body, and measurement errors due to inclination can be eliminated.

Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 shows an embodiment in which the holder part is removably attached.

In this embodiment, a holder 10 shown in FIG. 2 is removably attached to a conventional seaming micrometer shown in FIG. 8. Holder 1
0 has a cylindrical fitting part 11 that fits into the frame base end 3 of the seaming micrometer main body, a semicircular ring part 12 extending from the fitting part 11 to the fixed position of the anvil 5, and further the semicircular ring part 12. It is formed with an extension part 13 extending from the ring part 12. The extension part 13
A can body contact member 14 is removably provided with a screw 17 for accurately positioning the seaming micrometer in the axial direction of the can body when measuring seam height. A plurality of can body contact members 14 with different thicknesses are prepared in order to accommodate the difference in the difference A (FIG. 6) between the can body diameter and the lid seam diameter due to different types of cans. It can be selected and used. The can body contacting member 14 of the illustrated embodiment has a convex portion 15 at the tip and its thickness is changed, and by attaching it to the holder with the front and back reversed, the fifth
As shown in the figure and FIG. 6, two types of dimensions A can be accommodated. Note that 16 in the figure is a block for facilitating positioning when the holder is attached.

Attach the holder 10 configured as described above to the seaming micrometer body, and attach the mounting screw 8
and measure the seam height. Therefore,
According to this micrometer, the can body contact member 14
By simply bringing the micrometer into contact with the can body CB, the micrometer can be accurately held in the axial direction of the can body during measurement, and measurement errors caused by the tilt of the micrometer that conventionally occur can be easily eliminated. When measuring an aerosol can, the holder can be removed and used in the same manner as a conventional seaming micrometer.

In the embodiments described above, the holder portion is constructed of a detachable holder, but it can also be constructed integrally as in the embodiment shown in FIG. In this embodiment, the frame 18 is further extended from the anvil fixing position, and a can body contacting member 19 is detachably provided at the extended end as in the above embodiment.

In each of the above embodiments, the can body contacting member has a flat can body contacting surface, but by making the can body contacting surface curved to match the shape of the can body, a more stable state can be achieved. It can be measured by . Further, the material of the can body contact member is not limited to a rigid body, and an elastic body may be used. Furthermore, by adopting a magnet for the can body contacting member, when measuring cans whose can bodies are magnetic, the can body contacting member is attracted to and held by the can body, allowing for more accurate measurements. .

Effects As described above, according to the present invention, it is possible to accurately hold the micrometer in the axial direction of the can body during measurement by simply bringing the can body contact member into contact with the can body. It is possible to eliminate the occurrence of measurement errors due to the difficulty in positioning the micrometer at the time of use, and it is possible to easily and accurately measure the seam height. Furthermore, since the holder is constructed separately, it can be easily attached to a conventional seaming micrometer for use. moreover,
By preparing a plurality of can body contact members with different thicknesses and making them replaceable, the seam heights of various cans with different neck dimensions can be accurately measured.

[Brief explanation of drawings]

1 to 7 show embodiments of the present invention, FIG. 1 is a perspective view of the seaming micrometer of the present invention, FIG. 2 is a perspective view of the holder, and FIG. 3 is a side view of the holder body. Fig. 4 is a perspective view of the can body contact member, Figs. 5 and 6 are respective state diagrams during seam height measurement, Fig. 7 is a perspective view of a seaming micrometer of another embodiment, and Fig. 8 is a conventional FIG. 9 is a perspective view of the seaming micrometer shown in FIG. 1: Seaming micrometer, 2: Frame, 3: Base end of frame, 4: Spindle, 5: Anvil, 10: Holder, 11: Fitting part, 12:
Semicircular ring part, 13: Extension flat part, 14, 19: Can body contact member, 18: Frame, C: Can, CB: Can body.

Claims (1)

[Scope of Claims] 1. In a seaming micrometer that measures the seam height by sandwiching the seaming height of a can to be measured between a spindle and an anvil, the can body of the can to be measured is located at an axially extending end from a fixed position of the anvil. A seaming micrometer characterized by having a holder portion provided with a can body contact member that comes into contact with the can body. 2. The seaming micrometer according to claim 1, wherein the holder portion is provided in a detachable manner.