JPH10132730A - Tear testing machine for packaged body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a tear testing machine by which a load can be measured when a packaged body is torn along a perforation or a cut groove by detecting an operating stress, which acts on a clamp mechanism used to tear the packaged body along the perforation or the cut groove, and displaying the tearing load of the packaged body. SOLUTION: A clamp positioning pipe 24B is turned so as to be coupled to a pin, the pressed-down state of the clamp positioning pipe 24B is maintained, and both a first clamp mechanism 12A and a second clamp mechanism 12B are set to a rotatable state by making use of a horizontal support as a fulcrum. Then, when a moving sensor shaft 6 is raised gradually, the first clamp mechanism 12a is raised, a part between the clamp mechanisms 12A, 12B is opened, a packaged body 1 is torn along a perforation by an action in which the side edge, one side, of the packaged body 1 sandwiched by the first clamp mechanism 12A and the side edge, on the other side side, of the packaged body 1 sandwiched by the second clamp mechanism 12B are torn in mutually opposite directions, and a tearing load is detected by a sensor 7 so as to be displayed on a load display 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a perforation formed on a resin package (packaging sheet, packaging bag, etc.) which seals, for example, tablets, granules or seasonings of food. The present invention relates to a package tear tester capable of effectively measuring a force (splitting load) when the package is torn along a cut groove when the package is to be cut. .

[0002]

2. Description of the Related Art For example, as a packaging means for packaging medicines such as tablets, granules and powders or contents such as foods and seasonings, a resin film or sheet made of polyethylene, vinyl or the like is used as a material. The use of such a package is well known, and in order to enhance the preservability of the content packaged by the resin package, the package is generally hermetically sealed by heat sealing means or the like.

[0003] In the case of consumption or subdivision of an article to be packaged hermetically sealed by a resin package as described above,
A part of the resin package is torn and separated, but the tearing force required for this tearing depends on the strength of the packaging bag (thickness of the film material) and the like.
It is mixed and sometimes difficult to rip.

In particular, in the case of a package made of a resin sheet or film or the like, a perforation or a cut groove is provided to facilitate the consumption and subdivision of the sealed package. However, in the case of a package provided with such perforations or kerfs, it is necessary to confirm the cutting strength at the perforations or kerfs (hereinafter referred to as a tearing load).

As a conventional means for examining a tearing load along a perforation or a cut groove in a resin package having such a structure, a measuring operator grips both ends of the package with both hands, and then uses both hands. Are moved in opposite directions to cut the package along perforations or cut grooves provided in the package, and the feel at this time is used to estimate the tearing load (cutting stress) of the package. Was.

[0006]

However, in the conventional means for estimating the tearing load of a package by such a tearing operation by manual force, the gripping method of the package to be cut or the gripping position of the package, and The estimated value of the tearing load changes depending on the degree of the force to be broken, etc., and furthermore, the estimated value greatly changes depending on the individual difference of the measurement operator, and therefore, the tearing load of the predetermined package can be accurately calculated. It was impossible to measure.

[0007] The present invention has been made in view of the above, and a mechanical load is applied to a package provided with a perforation or a kerf when a package is torn along the perforation or the kerf. It is an object of the present invention to provide a package tear tester capable of measuring.

That is, in the present invention, both ends of the package to be cut are gripped by the pair of clamp mechanisms, and then the clamp mechanisms are operated to the opposite sides to cut the package, which acts during the tearing operation. The purpose is to measure the load of a pair of clamp mechanisms by a load sensor.

[0009]

In order to achieve the above-mentioned object, according to the first aspect of the present invention, there is provided a package having a perforation or a kerf, both ends of which are bordered by the perforation or the kerf. , A pair of clamp mechanisms for respectively gripping, a pair of clamp mechanisms operating in opposite directions to each other, and an operating mechanism of a clamp mechanism for cutting the package body along the perforations or cut grooves, and the operating mechanism. The present invention is characterized in that it is a package tear tester including a load sensor for detecting an operating stress of a clamp mechanism acting on the package and a display for displaying a tear load of the package by a detection force from the load sensor.

According to a second aspect of the present invention, in addition to the first aspect, one of the pair of clamp mechanisms is pivotally supported on the upper end of the column, and the other clamp mechanism coincides with the center axis of the column. The center of the movable sensor shaft, which is positioned on the center axis and is movable in the axial direction, is supported by the lower end of the movable sensor shaft, and the clamping position of the package by the two clamp mechanisms is an axis connecting the pivot points of the clamp mechanisms. The present invention is characterized in that the package is a eccentric position tear tester.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on an embodiment shown in the drawings.

FIG. 1 shows a package for packing tablets, for example. The package 1 is provided with perforations 2 for cutting each tablet. The present invention has a feature in a tear tester for measuring a tear load when tearing the package 1 along a perforation 2, and the entire structure of the tear tester is shown in FIGS. 2 and 3. .

In FIGS. 2 and 3, reference numeral 3 denotes a stand of the tester, on which a stand column 4 extending in a vertical direction is mounted. Reference numeral 5 denotes a movable frame which is supported by the stand support 4 so as to be movable in the vertical direction.
It holds a load sensor 7 having a movable sensor shaft 6 extending in the hanging direction.

Reference numeral 8 denotes a support shaft vertically supported by a support plate 9 mounted on the upper surface of the stand base 3. The core is located so as to coincide with the same axis.
Reference numeral 10 denotes a load display for displaying a load value based on an output from the load sensor 7, and reference numeral 11 denotes an operation panel.

At the lower end of the movable sensor shaft 6 and the upper end of the support shaft 8, a first clamp mechanism 12A and a second clamp mechanism 12B are supported by horizontal support shafts 13A and 13B, respectively. The pair of clamp mechanisms 12A and 12B have substantially the same structure arranged close to the left and right in the front view of FIG.

The configuration of the pair of first and second clamp mechanisms 12A and 12B will be described below with reference to FIGS. First, the first clamp mechanism 12A will be described. 14A is a first clamp frame formed in a substantially U-shaped side surface having a horizontal clamping surface 15A, and inside the first clamp frame 14A. A holding piece 16A facing the holding surface 15A is arranged. This holding piece 1
6A is engaged with the tip of a rod spring 17 having one end fixed to the first clamp frame 14A.
6A is urged away from the holding surface 15A.

Reference numeral 18A denotes a first cam which can be brought into contact with the upper surface of the holding piece 16A. The first cam 18A is connected to a cam shaft 19 supported by a first clamp frame 14A via a cam pin 20. Is fixed. A first cam handle 21A for rotating the first cam 18A via the cam shaft 19 is fixed to the cam shaft 19.
Reference numeral 22 denotes a connecting portion formed on the first clamp frame 14A for connecting the first clamp frame 14A to the movable sensor shaft 6 via the horizontal support shaft 13A.

The structure of the first clamp mechanism 12A has been described above. The second clamp mechanism 12B, which is horizontally opposed to the first clamp mechanism 12A, is also symmetrical to the first clamp mechanism 12A. Is formed. That is, 14
B is a second clamp frame formed in a substantially U-shaped side surface having a horizontal clamping surface 15A, and a clamping piece 16A facing the clamping surface 15B is arranged inside the second clamp frame 14B. Have been. One end of a rod spring 17 whose one end is fixed to the first clamp frame 14A is engaged with the holding piece 16A, and the elasticity of the rod spring 17 causes the holding piece 16A to hold the holding surface 1A.
It is biased away from 5B. Reference numeral 18B denotes a second cam that can abut on the upper surface of the holding piece 16B. The second cam 18B is fixed to a cam shaft 19 supported by a second clamp frame 14B via a cam pin 20. ing. The camshaft 19 has a second
A second cam handle 21B for rotating the cam 18B is fixed. 23 is a second clamp frame 14
B shows a connecting portion for connecting the second clamp frame 14B to the support shaft 8 via the horizontal support shaft 13B. The above is the configuration of the second clamp mechanism 12B. The second clamp mechanism 12B is connected to the upper end of the column 8 via a horizontal support shaft 13B.
Is connected to the lower end of the movable sensor shaft 6 via a horizontal support shaft 13A. Further, a clamp positioning tube 24A is fitted to the connection between the first clamp mechanism 12A and the lower end of the movable sensor shaft 6 by the elastic force of the spring 25, and the first and second clamp mechanisms 12A and 12B are connected to the horizontal support shaft 1 by the elastic force.
The clamping mechanisms are positioned so as not to swing around the axes 3A and 13B (see FIG. 4).

Then, the first and second cam handles 21A and 21B of the first and second clamping mechanisms 12A and 12B are operated to operate
6A and 16B are released, and both holding pieces 16A and 1B are released.
6B is separated from the clamping surfaces 15A, 15B of the first and second clamp frames 14A, 14B, and the clamping surfaces 15A
Then, insert both sides of the package 1 to be broken between the holding pieces 16A and 16B (see FIG. 4), and then operate the first cam handle 21A and the second cam handle 21B. The holding pieces 16A and 16B are pushed down by the first cam 18A and the second cam 18B, and the holding pieces 16A and 16B are pushed down.
Both sides of the package 1 are sandwiched between the package 6B and the sandwiching surfaces 15A and 15B (see FIG. 8).

Therefore, the clamp positioning tube 24A described above is used.
Is pushed up against the elastic force of the spring 25, and then the clamp positioning tube 24A is rotated to engage the clamp positioning tube 24A with the pin 26 to maintain the clamp positioning tube 24A in the pushed up state. After the clamp positioning tube 24B is pressed down against the elastic force of the spring 25, the clamp positioning tube 24B is rotated,
The clamp positioning tube 24B is engaged with the pin 26 so that the clamp positioning tube 24B is kept pressed down, and the first and second clamp mechanisms 12A and 12B can be rotated about the horizontal supports 13A and 13B. State.

Next, when the movable sensor shaft 6 of the load sensor 7 is gradually raised, the first clamp mechanism 12A is raised, and the space between the first clamp mechanism 12A and the second clamp mechanism 12B is opened. Therefore, the first clamp mechanism 12
The package 1 held by the second clamp mechanism 12B is pulled in the opposite direction to one side edge of the package 1 held by the second clamp mechanism 12B. The tear is cut along the eye 2 (see FIG. 9), the load is detected by the load sensor 7, and the detected value is displayed on the load display 10.

Further, as shown in FIG. 10, if the first clamp mechanism 12A is raised, the package 1 can be finally broken along the perforations.

[0023]

As described above, according to the present invention, both side edges of the package to be cut along the perforations are sandwiched by a pair of clamp mechanisms, and the clamp mechanisms are mechanically displaced in opposite directions. The package can be cut along the perforations by mechanical movement of the movable sensor shaft, and the tearing force acting on the movable sensor shaft can be detected to measure the tearing force mechanically and electrically. Because of the structure, the tearing load value of various packages or a single package can be accurately and reliably measured by a single mechanical operation.

Further, in the present invention, since the tearing is performed by a mechanical operation without relying on the feeling of the operator, the measurement can be performed with high reliability without causing variation in personal measurement values by the measurer. And its management becomes possible.

Further, in the present invention, the operation of clamping the edge of the package by the clamp mechanism can be performed by a simple lever operation and does not require any skill or the like. If you have
It can be done easily and reliably.

[Brief description of the drawings]

FIG. 1 is a perspective view of a package to be subjected to a tear test.

FIG. 2 is an overall front view of the tear tester according to the present invention.

FIG. 3 is a side view of FIG. 2;

FIG. 4 is an enlarged view showing a main part of a tear tester according to the present invention.

FIG. 5 is a front view showing a pair of clamp mechanisms provided in the present invention.

FIG. 6 is a right side view of FIG.

FIG. 7 is a plan view of FIG. 6;

FIG. 8 is a side view showing a state in which the package is clamped by the clamp mechanism.

FIG. 9 is an explanatory view at the time of a tearing operation of a package by the tear tester of the present invention.

FIG. 10 is an operation explanatory view showing a state in which the package is further cut by the tear tester of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Package 2 ... Perforation 3 ... Stand base 4 ... Stand support 5 ... Movable frame 6 ... Movable sensor shaft 7 ... Load sensor 8 ... Support shaft 9 ... Support plate 10 ... Load display 11 ... Operation panel 12A ... 1st Clamp mechanism 12B ... Second clamp mechanism 13A ... Horizontal support shaft 13B ... Horizontal support shaft 14A ... First clamp frame 14B ... Second clamp frame 15A ... Clamping surface 15B ... Clamping surface 16A ... Clamping piece 16B ... Clamping piece 17 ... Rod spring 18A ... first cam 18B ... second cam 19 ... camshaft 20 ... cam pin 21A ... first cam handle 21B ... second cam handle 22 ... connecting part 23 ... connecting part 24A ... clamp positioning pipe 24B ... Clamp positioning tube 25 ... Spring 26 ... Pin

Claims (2)

[Claims] 1. A pair of clamp mechanisms and a pair of clamp mechanisms for gripping both ends of a package body provided with perforations or cut grooves, respectively, bordering the perforations or cut grooves in directions opposite to each other. Operating mechanism of a clamp mechanism for tearing the package to be gripped along the perforations or cut grooves, a load sensor for detecting a tear load of the perforations or cut grooves acting on the operating mechanism, and the load sensor A tear tester for a package, comprising: a display for displaying a tear load of the package with a detection force from the package. 2. One of a pair of clamp mechanisms is pivotally supported on an upper end of a column, and the other clamp mechanism is located on a central axis coinciding with the central axis of the column, and extends in the axial direction. 2. A clamped position of the package body which is supported by a lower end of a movable sensor shaft which is movable, and which is eccentric with respect to an axis connecting the fulcrum points of the clamp mechanisms. A packaging tear tester according to the above.