JPH05249027A - Method and apparatus for testing peeling - Google Patents

Abstract

PURPOSE:To obtain a method and apparatus for testing tensile strength with high measurement accuracy while a test piece placed on a base is being kept at a constant peeling angle with respect to the base. CONSTITUTION:In a method for testing tensile strength when a test piece 11 placed on a base 1 is peeled with a peeling angle theta with respect to the base 1, a guide column 4 is placed at an installation angle of (1/2)theta with respect to the base 1 and a force sensor 9 is placed at the installation angle of (1/2)theta with respect to the guide column 4 so that both base angles of a triangle are virtually formed with the installation angle of the guide column 4. At least either the force sensor 9 or the base 1 is moved along the guide column 4 in a mutually separating direction while a peeled end of the test piece 11 is held on a load receiving part 9a of the force sensor 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is for peeling a test piece such as an adhesive tape, a seal, a lid of a retort food or a stopper of a pull-top can, which is arranged on a base, at a constant peeling angle from the base. And apparatus for testing the tensile strength of

[0002]

2. Description of the Related Art As the peeling test method and apparatus, in which a force sensor linearly moves at a constant orientation angle with respect to a base while holding a peeling end of a test piece in its load receiving portion, The peeling angle of the test piece inevitably deviates from the test piece, which causes a problem of applying an unbalanced load to the force sensor.

In the above-mentioned case in which the base is movable by the tensile force of the test piece, the force sensor has an orientation angle of 9
The peeling angle can always be maintained at 90 degrees only when the linear movement is performed at 0 degrees, but in this case, the movement resistance of the base affects the measurement accuracy.

When the movable base is used as described above and the test piece is peeled off through the stationary roller, the force sensor is linearly moved around the stationary roller at an arbitrary orientation angle, There is an advantage that the peeling angle can always be maintained at the orientation angle of the force sensor, but on the other hand, the rotational resistance of the stationary roller and the like will be added as a factor that lowers the measurement accuracy.

[0005]

The problems to be solved by the present invention are as follows.
It is an object of the present invention to provide a method and an apparatus for testing tensile strength with high measurement accuracy while holding a test piece arranged on a base at a constant peeling angle with respect to the base.

[0006]

According to the peeling test method of the present invention, a peeling angle θ of a test piece placed on a base is relative to the base.
In the method of testing the tensile strength when peeling with
The guide pillar is installed at an arrangement angle (1/2) θ with respect to the base, and the force sensor is arranged with respect to the guide pillar so that both sides of the triangle are virtually formed together with the arrangement angle of the guide pillar. Install it at an angle (1/2) θ, and move at least one of the force sensor and the base in the direction away from each other along the guide column while holding the peeling end of the test piece in the load receiving part of the force sensor. It has a feature.

Further, a peeling test apparatus for suitably carrying out the peeling test method is an apparatus for testing the tensile strength when a test piece arranged on a base is peeled from the base at a peeling angle θ. , The guide column that is supported on the base so that it can be adjusted to the placement angle (1/2) θ, the movable platform that is provided on the guide column so that it can move in the axial direction, and the movable platform Arrangement angle so as to virtually form both base angles of the triangle with the arrangement angle
(1/2) a force sensor that is adjustablely supported at θ, guide column body angle changing means that adjusts the arrangement angle of the guide column, force sensor angle changing means that adjusts the arrangement angle of the force sensor, and movable And a force sensor moving means for adjusting the position of the force sensor on the guide column via the table.

In the peeling test apparatus, the guide column changing means and the force sensor changing means are, for example, a first worm wheel fixed to the base on a coaxial line with the bearing shaft of the guide pillar, and a force sensor. A second worm wheel fixed coaxially with the bearing shaft, a worm shaft supported along the guide column along with it, a first worm fixed to the worm shaft so as to be meshable with the first worm wheel, It is supported on the movable base so as to be meshable with the second worm wheel, is engaged with the worm shaft so as to be rotatable with respect to the worm shaft, and is movably engaged in the axial direction, and in the same direction as the mesh rotation of the first worm with respect to the first worm wheel. It is possible to select a second worm that gives the same worm gear rotation to the second worm wheel and a worm shaft rotating means that adjusts the arrangement angles of the guide column and the force sensor in conjunction with each other. The force sensor moving means, for example,
It may be composed of a screw shaft which is non-rotatably screwed with the movable base and is supported by the guide column along with it, and a screw shaft driving means for rotating the screw shaft.

[0009]

In the peeling test method, when at least one of the force sensor and the base is moved in the direction in which they are separated from each other along the guide column, peeling of the test piece by the force sensor is started.

In this case, the base, the guide column and the force sensor are arranged so that the arrangement angle (1/2) θ of the guide column and the guide sensor are irrespective of the movement of the force sensor and / or the base along the guide column. Virtually configure each side of an isosceles triangle whose base angle is the angle (1/2) θ of the force sensor. Therefore, the orientation angle (outer angle) of the force sensor with respect to the base is an angle θ corresponding to the sum of the two bottom angles.
And the moving speed of the force sensor and / or the base is the same in each arrangement direction of the base and the force sensor, and the test piece is folded back in the axial direction of the force sensor by the length that the test piece is peeled from the base. Therefore, the peeling angle of the test piece is always held at the angle θ equal to the orientation angle of the force sensor, and no unbalanced load is applied to the force sensor.

[0011]

EXAMPLES The present invention will be described below based on examples. [Embodiment 1] FIG. 1 is a side view of a peeling test apparatus according to an embodiment of the present invention. In the figure, a base 1 is installed horizontally via an adjusting screw 2, a pillar 3 is projected on the base 1, and an angle of a guide pillar 4 is adjustable at a tip of the pillar 3 via a bearing shaft 5. The guide shaft 4 is supported by the screw shafts 6 at both ends thereof, and a rotary handle 7 as a screw shaft driving means is attached to the tip of the screw shaft 6. Further, a movable base 8 is screwed onto the screw shaft 6 so as not to rotate together, and a force sensor 9 is supported on the movable base 8 via a bearing shaft 10 so that the angle can be adjusted. The test piece 11 is adhered and fixed via the test plate 12.

In the above construction, the support shaft 5 is the guide column 4
Of the guide column body that adjusts the arrangement angle of the force sensor 9, the support shaft 10 that constitutes the force sensor angle changing means that adjusts the arrangement angle of the force sensor 9, and the screw shaft 6 and the rotation handle 7 of the guide column body. The force sensor moving means for adjusting the position of the force sensor 9 on the position 4 is constituted.

In the case of testing the tensile strength when the test piece 11 on the base 1 is peeled from the base 1 at the peeling angle θ using the above-mentioned apparatus, the guide column 4 is arranged with respect to the base 1 at an arrangement angle.
(1/2) θ, and the angle of arrangement of the force sensor 9 with respect to the guide column 4 is set so as to virtually form both base angles of the triangle with the arrangement angle of the guide column 4 (1/2) θ After the adjustment, the rotary handle 7 is operated to move the force sensor 9 along the guide column 4 in the distal direction while holding the load receiving portion 9a at the peeling end of the test piece 11. The peeling of the test piece 11 proceeds while the orientation angle (outer angle) of the force sensor 9 and the peeling angle of the test piece 11 are both held at the angle θ.

If necessary, scales and other indicators for displaying the arrangement angles of the guide column 4 and the force sensor 9 and the peeling angle and peeling length of the test piece 11 are attached to the apparatus. Good. Further, in the present embodiment in which the base 1 is fixed together with the guide pillars 4 and the force sensor 9 is moved along the guide pillars 4, for example, the force sensor 9 is fixed together with the guide pillars 4 and the base 1 is fixed. It is also possible to easily change the design so that the force sensor 9 and the base 1 are moved along the guide pillar 4, or both of them can be moved along the guide pillar 4. Similar effects can be obtained.

[Embodiment 2] FIG. 2 is a partial cross-sectional side view of a peeling test apparatus according to another embodiment of the present invention. In the same figure, as in the first embodiment, the guide column 4 is supported on the tip of the column 3 protruding from the base 1 via the bearing shaft 5, and the screw shaft 6 is provided along the guide column 4. The movable base 8 is supported and screwed onto the screw shaft 6 in a non-rotatable manner, the force sensor 9 is supported on the movable base 8 via the support shaft 10, and the test piece 11 made of an adhesive tape is mounted on the base 1. Are adhesively fixed via the test plate 12.

A first worm wheel 13 is fixed to the tip of the support column 3 coaxially with the bearing shaft 5, a second worm wheel 14 is fixed to the force sensor 9 coaxially with the bearing shaft 10, and a second worm wheel 14 is fixed to the guide column 4. The worm shaft 15 is supported at both ends thereof, and the first worm 16 is fixed to the base end of the worm shaft 15 so as to be able to mesh with the first worm wheel 13. Further, a second worm 17 is supported on the movable base 8 so as to be capable of meshing with the second worm wheel 14, and the second worm 17 is rotatable with the worm shaft 15 and is movable in the axial direction through the key groove 15a. The second worm wheel 14 is engaged and gives the second worm wheel 14 a meshing rotation in the same direction and at the same angle as the meshing rotation of the first worm 16 with respect to the first worm wheel 13. Further, an adjusting knob 18 is attached to the tip of the worm shaft 15, and a motor 19 as a screw shaft driving means that constitutes a force sensor moving means together with the screw shaft 6 is installed at the tip of the guide column 4 and its output shaft is the screw shaft. 6 is connected to the tip.

In the above structure, the support shaft 5, the first worm wheel 13, the first worm 16 and the like cooperate with each other to form a guide column changing means, and the support shaft 10, the second worm wheel 14 and the second worm. 17 and the like cooperate with each other to form a force sensor changing means, and both changing means are interlockedly driven by a common drive mechanism including a worm shaft 15 and an adjusting knob 18 as a worm shaft rotating means.

In the case of testing the tensile strength when the test piece 11 on the base 1 is peeled from the base 1 at the peeling angle θ by using the above-mentioned apparatus, as in Example 1, the guide column 4 is used.
With respect to the base 1 so that the force sensor 9 and the guide column 4 are arranged so that both base angles of the triangle are virtually formed together with the arrangement angle of the guide column 4. After adjusting the arrangement angle (1/2) θ, the motor 19 is driven to move the force sensor 9 along the guide column 4 in the direction of its tip.

Further, when the adjusting knob 18 is rotated in the above state, the first worm 16 is rotated by the angle ± α around the support shaft 5 while meshing with the first worm wheel 13 and the arrangement of the guide pillar 4 is arranged. The angle changes to an angle {(1/2) θ ± α}, and at the same time, the second worm wheel 14 meshes with the second worm 17 and rotates about the bearing shaft 10 by the same angle ± α in the same direction as the above. With this, the arrangement angle of the force sensor 9 changes to an angle {(1/2) θ ± α}, so that the orientation angle of the force sensor 9 with respect to the base 1 and the peeling angle of the test piece 11 are both angles (θ ± 2α). Is changed to.

That is, in the case of the present embodiment, the arrangement angles of the guide column 4 and the force sensor 9 are increased / decreased at the same angle by the operation of the adjustment knob 18 and are adjusted in conjunction with each other. The body 4 and the force sensor 9 are held in a required arrangement relationship that exhibits a virtual isosceles triangle.

[0021]

Since the peeling test method and apparatus according to the present invention are configured as described above, the orientation angle of the force sensor with respect to the base and the peeling angle of the test piece are kept equal during the peeling test, and the base is maintained. It is possible to test the tensile strength with high measurement accuracy while holding the test piece arranged above on the base at a constant peeling angle.

[Brief description of drawings]

FIG. 1 is a side view of a peeling test apparatus according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional side view of a peel test apparatus according to another embodiment of the present invention.

[Explanation of symbols]

 1 Base 4 Guide column 9 Force sensor 9a Load receiving part 11 Test piece

Claims (2)

[Claims] 1. A method of testing tensile strength when a test piece placed on a base is peeled from a base at a peel angle θ, wherein a guide column is arranged at an angle (1/2) to the base. It is installed at θ, and the angle of arrangement of the force sensor with respect to the guide column is set so that both base angles of the triangle are virtually formed together with the arrangement angle of the guide column.
It is installed at (1/2) θ, and at least one of the force sensor and the base is moved in the direction in which they separate from each other along the guide pillar while holding the peeling end of the test piece in the load receiving part of the force sensor. Peel test method. 2. An apparatus for testing the tensile strength when a test piece placed on a base is peeled from the base at a peel angle θ so that the placement angle on the base can be adjusted to (1/2) θ. The supported guide pillar body, the movable base provided on the guide pillar body so as to be movable in the axial direction, and the triangular base angles of the triangle are virtually formed on the movable base together with the arrangement angle of the guide pillar body. Positioning angle (1/2) θ
A force sensor movably supported on the guide column, a guide column body changing means for adjusting the arrangement angle of the guide pillar body, a force sensor changing means for adjusting the arrangement angle of the force sensor, and a guide pillar via a movable base. A peeling test apparatus comprising: a force sensor moving unit that adjusts the position of the force sensor on the body.