JPH02195229A - Adhesive-strength measuring apparatus - Google Patents

Abstract

PURPOSE:To use one measuring instrument for twofold purposes and to simplify the constitution by connecting a first test-piece attaching stage to a measuring- part attaching stage which is freely moved on a straight line through a link, and converting the turning torque of the link into compressing pressure and tensile force. CONSTITUTION:A first test-piece attaching stage 14 is connected to a measuring- part attaching stage 3 which is freely slidden and moved on a straight line through a link 16. The measuring-part attaching stage 3 is moved leftward. A bonding agent is applied on a first test piece which is held with the stage 14 from a hot melt gun 33. Then, a second test piece which is supported with a second test-piece attaching stage 58 is compressed to the first test piece with a compressing part 35. Thereafter, the bonded first and second test pieces are pulled when the stage 3 is returned to the original position. The compressing force and the tensile force and converted into the turning torques of the turning link 16, respectively, and the torques are measured with the same load cell 10.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention applies adhesive to sample pieces of various materials, from flexible materials such as paper to rigid materials such as plastic and iron, and then presses them. This invention relates to an adhesive force measuring device that measures the adhesive strength of a sample piece after tightening.

[Conventional technology]

In recent years, packaging processes such as packaging machines have become faster, and the processes from applying adhesive to pasting, heating, and pressurizing are completed in a few seconds, and the packaged product is discharged from the machine.

Along with this, there is an increasing need to numerically understand the adhesive strength for several seconds to tens of seconds after bonding in a short time.
As a measuring device for this purpose, for example,
There are techniques described in Japanese Patent Application Laid-open No. 184 and Japanese Patent Application Laid-Open No. 60-257340.

[Problem to be solved by the invention]

The technique described in the above-mentioned Japanese Patent Application Laid-Open No. 60-257340 does not have an adhesive application mechanism or an adhesive force measuring mechanism, and only a clamping operation is shown.

On the other hand, the technique described in Japanese Patent Publication No. 57-42184 has a series of mechanisms for applying adhesive, pressing, and testing adhesive strength, but it has a structure in which a sample piece is pulled by rotating a circular segment. Therefore, the target of measurement was a sample piece that was thin like paper and had little rigidity.

However, there is a need for a measuring device that can also measure rigid materials such as steel or plastic materials.

Further, if the clamping pressure after application of the adhesive and the adhesive force after clamping can be measured using a single measuring instrument, the configuration of the entire measuring device can be simplified and convenient.

The present invention aims to solve all of the above problems.

[Means to solve the problem]

In order to achieve the above object, a first sample piece mount that grips a first sample piece is connected via a link to a measurement unit mount that can slide in a linear direction on a slide base. can be pulled in a straight direction.

By arranging the adhesive application part, the pressure part, and the second sample piece mount in the sliding direction of the measuring part mount, the adhesive application length of the first sample piece is controlled and the adhesive application part is pressed. The second sample piece was moved to the tightening section and the second sample piece was clamped, and after both sample pieces were adhered, the first sample piece was pulled to measure the adhesive strength.

In order to measure the clamping pressure of the clamping part and the tensile force of the first sample piece with one measuring device, the first sample piece mounting stand and the measuring device are connected via a link, and the rotation generated in the link is measured. The dynamic torque can be converted by switching between clamping pressure when clamping and tensile force when pulling a sample piece.

[For production]

The first sample piece mounting stand and the second sample piece mounting stand each have a
Attach the sample piece and the second sample piece, move the measuring unit mounting base from the base position at the set coating speed, use hot melt before gluing, and set the adhesive to beat setting if you use a real melt gun as the coating device. After truemelt is applied while moving, if the adhesion is set to spot, it will stop at the adhesive application part, and after the truemelt has been applied for the set discharge time, it will stop at the clamping part.

When the set "post-application standing time" has passed, the clamping plate is lowered and both sample pieces are adhered.

This clamping pressure is transmitted to the measuring instrument as a rotating force of the link via the first sample piece mount, and the torque value is converted into clamping pressure and stored.

When the set clamping time has elapsed, the clamping plate will rise.

When the set standing time after pressing has elapsed, the sample piece mount moves back at a very slow speed at the set measurement speed, and the shearing force or peeling force due to tension on both sample pieces acts on the link as rotational torque, and the torque on the link is It is converted into tensile force and stored.

After the measurement is completed, the first sample piece mount returns to the base position, and the measurement results are immediately printed out.

〔Example〕

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

Figure 1 shows a front view of the true melt adhesive strength measuring device.
FIG. 2 shows its plan view.

In the same figure, a slide base 2 is provided on a common base plate 1 having a horizontal upper surface, and a measurement unit mount 3 is slidably placed on a sliding surface provided on the upper surface of the slide base 2. .

A ball screw 4 is provided above the slide base 2 in parallel with the longitudinal direction of the slide base 2. The ball screw 4 is rotatably supported near both ends by bearings 5, and the right end is supported via a coupling 6. It is connected to a servo motor 7.

A pole nut 8 that is screwed onto the ball screw 4 is held by a mounting member 9 that is fixed to the measurement unit mount 3, and when the servo motor 7 rotates forward or reverse, the measurement unit 3 moves forward on the slide base 2. Or go backwards.

As shown in the front view of FIG. 3, the partially cutaway view of FIG. 4, and the plan view of FIG. A mounting base 11 is fixed thereto, and a roller 12 attached to the tip of the load cell 10 is in contact with one end of a link 13. The other end of the link 13 is pivotally connected to a first sample piece mount 14, and the center portion is pivotally connected to a mount 15 erected on the measuring section mount 3. Further, one end of the link 16 is pivotally connected to the mount 15, and the other end is pivotally connected to the first sample piece mount 14.

A clamp 17 for a tensile test or a clamp for a peel test (not shown) for gripping the first sample piece is removably attached to the first sample piece mount 14.

The clamp 17 is a mounting table 1 on which the middle part of the first sample piece is placed.
8 and a fastening fitting 19 for fastening the front end of the first sample piece hanging down from the mounting table 18, and removable glue receivers 20 and 21 are provided on both sides of the mounting table 18.

A spring 24 is stretched around pins 22 and 23 slidably installed on the first sample mounting base 14 and the handle 74, respectively, and in the case of a shear test, the rear end of the first sample piece is held between them.

A support column 25 is installed on the common base plate l in the sliding direction of the measurement unit mount 3, and two support arms 26 provided on the support column 25
This calibration weight 27 is used only when applying a known load to the first sample mounting base 14 to calibrate the measured value of the load cell 10. When this is completed, the support arm 26 and the support arm 26 are removed from the support column 25. When open--Mu7 phantom shot 1-include 4-fujishira →, 1 5° The stand 30 of the adhesive application part 29 is installed on the common base plate 1 in the sliding direction of the measuring part mounting base 3. The hot melt gun 3 is mounted on a saddle 32 which is slidably provided on the side surface of the frame 30 in the vertical direction and whose height is adjusted by an adjustment bolt 31.
3 is supported.

The real melt gun 33 applies heat-adhesive adhesive from a nozzle 34 at the tip, and the amount of application is determined by the nozzle diameter,
This is determined by applicator tank pressure and discharge time.

In the sliding direction of the measurement unit mount 3, a clamping part 35 is provided ahead of the adhesive application part 29.

As shown in the front view of FIG. 6 and the side view of FIG. 7, the clamping part 35 is provided with a mount 42 that is vertically adjustable on a pedestal 36 installed on the common base plate l.

A fixture 38 attached to the air cylinder 37 and a slide block 44 that is slidable in the vertical direction are fixed on the mounting base 42, and a guide member 40 and a sensor 41 are fixed on the slide block 44. .

The tip of the piston rod 43 of the air cylinder 37 is attached to the guide member 40.
When the sensing plate 71 attached to
A signal indicating that 5 has entered the clamping condition is issued, and counting of the clamping time is started.

Adjustment of the vertical position of the clamping plate 39 according to the thickness of the sample piece is as follows:
Sensor mounting base 4 screwed into male threaded portion 47 of handle 46
2 heights can be achieved by turning the handle 46.

There are two guide bars 4 between the upper and lower plates of the guide member 40.
8 is provided, and has a handle 49 at the upper end and a guide member 40
A spring receiver 51 provided at the lower end of the male screw 50 that is screwed into the
A spring 52 is fitted between the clamping plate 39 and the clamping plate 39 .

Therefore, the clamping plate 39 is provided so as to be movable up and down along the guide bar 48, and is biased downward by the spring 52.

A heater for hot pressing or a cooling mechanism for cold pressing is installed in the pressing plate 39 to adjust the pressing temperature of the sample piece.

The clamping plate 39 holds a first sample piece placed on the first sample piece mount 14 and coated with adhesive on its upper surface, and a second sample piece on the first sample piece.
The sample piece is clamped, and this clamping pressure is transmitted to the load cell 10 via the first sample piece mount 14, link 13, and roller 12, as shown in FIG.

The distance between the poles of the link 13 is 1, the inclination angle of the link 13 is θ, and the distance between the center pivot point of the link 13 and the roller 1 is
Assuming that the distance to 2 is 12, the relationship between the clamping pressure F and the force F' transmitted to the load cell 10 is When measuring the adhesive force by pulling, the tensile force F
2 and the force p, / transmitted to the load cell 10 (see the figure).

On the left side of the clamping part 35, a second sample piece mounting stand 5 is arranged on the common base plate 1.

As shown in the front view of FIG. 8 and the side view of FIG.
A slide block 60 is provided so as to be slidable in the vertical direction, and a clamp 61 for gripping the second sample piece is provided on the top of the slide block 60.

The clamp 61 has a lower clamp 62 fixed to the slide block 60 and a shaft part 63 that is fitted into a vertical hole of the lower clamp 62 so as to be movable up and down. and an upper clamp 66 that presses into contact with the clamp 62.

An inner end portion of a leaf spring 68 wound in a coil shape is fixed to an elastic body holding member 67 fixed to a frame 59, and the leaf spring 6
The outer end of 8 is fixed to a shaft portion 70 of a locking member 69 fixed to the lower part of the slide block 60.

Thus, the slide block 60 is urged upward by the leaf spring 68, and this upward urging force is applied to the slide block 6.
If the force is adjusted to be approximately equal to the weight of 0 and its attached material, the slide block 60 will be in a floating state with respect to the pedestal 59 without being affected by its own weight, and the second sample piece held by the clamp 61 will be When a slight upward or downward force is applied, the clamp 61 moves together with the slide block to follow the direction of the force acting on the second sample piece.

The sensor mounting rod 7 is parallel to the sliding direction of the measurement unit mounting base 3.
5 is mounted on the common base plate 1, and the sensor mounting rod 75 has a sensor 76 for detecting the position of the measurement unit mounting base 3.
81 is provided so that its position can be adjusted, and is fastened to the sensor mounting rod 75 with bolts (see FIG. 2).

The sensors 76 and 77 are provided near both left and right ends of the measurement unit mount 3, and are used for the stroke ends of the measurement unit mount.

The sensor 78 is provided at the origin position of the measurement unit mount 3,
The sensor 79 is used to decelerate the measurement unit mount 3 before it returns to its origin.

The sensors 80 and 81 determine the adhesive application area of the real melt gun 33 in the beat setting, and the application starts when the measurement unit mounting base 3 is detected by the sensor 80 and starts when the sensor 81 detects it. ends.

In the above embodiment, the adhesive is applied to the first sample piece by the adhesive application unit 29 equipped with the hot melt gun 33, but as shown in FIG. The adhesive application section 29' may also be used as an adhesive application section 29'.

In FIG. 11, the adhesive applicator 29' has an adhesive container 82 containing adhesive therein, and a glue roller 84 is fixed to a rotating shaft 83 provided above the adhesive container 82. As shown in FIG.

The rotation of the rotating shaft 83 causes the glue in the adhesive container 82 to adhere to the outer circumferential surface of the glue roller 84 , and the tip of the glue holder 86 that rotates together with the rotating shaft 85 comes into contact with the outer circumferential surface of the glue roller 84 , causing the glue to blur 86 . , and when the tip of the adhesive blur 86 rotates below the rotation shaft 85, the first sample piece on the first sample piece mount 14 of the measurement unit mount 3, which has moved at approximately the same speed as the adhesive holder 86. The glue is transferred to the sample piece.

The first sample piece coated with the adhesive is pressed onto the second sample piece by the pressing part 35, as in the above embodiment.

Next, automatic operation of the adhesive force measuring device configured as above will be explained based on FIG. 12.

Select automatic operation and press the measurement button to start (S
o).

Next, operating conditions such as the set operation mode and set values are read (St>), and it is confirmed that the measuring unit mount 3 is at the origin position (S).

Next, after it is confirmed that the clamping plate 39 is in the raised position and the measurement unit mount 3 is movable (S), the measurement unit mount 3 is moved to the adhesive application section 29.

If the application pattern is a beat type, the adhesive is applied from the nozzle 34 of the hot melt gun 33 from the time when the sensor 80 detects the sensor on the measurement unit mount 3 during movement to the clamping section until the time when the sensor 81 detects the adhesive. is applied.

In addition, if the application pattern is a spot type, the adhesive application is stopped immediately and the adhesive is applied for a predetermined time (S4
).

After the nozzle 34 finishes coating, it is left for a predetermined time by a timer (ss'), and when a printer is connected, the force F1' acting on the load cell 10 is converted into the clamping pressure F and printed out. , only the clamping operation is performed when the printer is not connected (Sh and S?).

Next, after a predetermined standing time, the clamping plate 39 is lowered, and the second sample piece is pressed onto the first sample piece placed on the first sample piece mount 14 for a predetermined time by a timer (Sa ),
At the same time, the clamping pressure is measured (S,).

When the clamping plate 39 rises, the timer leaves it for a predetermined time (
After S++), when a printer is connected, the force F2 acting on the load cell 10 is converted to a tensile force Ft, but when the printer is not connected, only the rightward movement of the measuring unit mount 3 carried out (S11 and 31
the law of nature.

When the measuring unit mount 3 moves to the right, the second sample piece whose end is held by the clamp 61 of the second sample piece mount 58 and the first sample piece whose end is held by the clamp 17 of the first sample piece mount 14 are moved to the right. A tensile force acts between it and the sample piece and is measured by the load cell IO (S14), and when the measurement unit mount 3 moves a certain distance, it moves at high speed, and when the measurement unit mount 3 is detected by the sensor 79, the measurement unit mount 3 moves at high speed. is switched to a low speed and stops when detected by the sensor 78 indicating the origin position (SI5).

Thus, the measurement cycle of the adhesive force measuring device is completed, the operating conditions are reset (s+i,), and if connected to a printer (Sl?), the clamping pressure, adhesive force, etc. are printed out (sea).

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

(1) Since the first sample piece moves in the linear direction together with the measurement unit mount, adhesive force can be measured even if the sample piece is a rigid body.

(2) Since the adhesive applying section, the pressing section, and the second sample piece mounting table are arranged in the moving direction of the measuring section mounting table, adhesion, pressing, and adhesive force measurement can be carried out continuously and efficiently.

(3) Clamping pressure and sample piece adhesion force can be measured with one measuring device attached to the measurement unit mount.

[Brief explanation of the drawing]

Fig. 1 to Fig. 13 show examples of the present invention, Fig. 1 is a front view of the true melt adhesive strength measuring device, Fig. 2 is a plan view of the same, and Fig. 3 is a measuring unit mounting stand and a sample piece. A front view of the mounting base, Fig. 4 is a partially cutaway side view of the same as above, Fig. 5 is a plan view of the same as above, Fig. 6 is a front view of the clamping part, Fig. 7 is a side view of the same as above, Fig. 8 is a front view of the second specimen mounting stand, Figure 9 is a side view of the same as above, Figure 10 is an explanatory diagram showing the relationship between the clamping pressure and the force acting on the load cell, and Figure 11 is a diagram showing the relationship between the tensile force and the load cell. FIG. 12 is a flowchart of the adhesive force measuring device, and FIG. 13 is a front view of the adhesive force measuring device equipped with a glue transfer type adhesive applicator. 1... Common base plate, 2... Slide base, 3...
Measuring unit mounting base, 4... Ball screw, 7... Servo motor, 8... Pole nut, 10... Load cell, 13.16... Link, 14... First sample piece mounting base, 17... Clamp, 27... Calibration weight, 2
9... Adhesive application part, 33... Real melt gun,
34... Nozzle, 35... Clamping part, 39... Clamping plate, 58... Second sample piece mounting stand, 61... Clamp. Patent applicant: Japan Tobacco Inc. Figure 6 Figure 12

Claims (1)

[Claims] A measurement unit mount is provided on the slide base so as to be slidable in a linear direction, and an adhesive application part, a pressing part, and a second sample piece mount are arranged in the sliding direction of the measurement part mount, A first sample piece mount is connected to the measurement part mount via a link, a measuring instrument connected to the first sample piece mount via the link is fixed to the measurement part mount, and the first sample An adhesive force measuring device comprising a control unit that converts the rotational torque generated in the link due to the clamping pressure and tensile force applied to the single mounting base into clamping pressure and tensile force, respectively.