JPS6130191Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a device for inspecting the strength of the breaking line portion of recording paper used in computers, etc., and its purpose is to test the strength of the recording paper at the breaking line according to the strength of the material used. The purpose is to make manufacturing possible and to avoid hindrance to breakage of recording paper in computers and the like.

Recording paper used in computers, etc. has break lines formed by perforating holes at predetermined intervals, and is cut from these areas, but there is no way to measure the strength of the break lines, so manufacturers The strength varies depending on the strength. For this reason, various damage occurred during handling, such as not being broken even with a certain force, being broken at a position other than the breaking line, or being broken unnecessarily.

On the other hand, there are various types of tensile strength testing devices for wire materials, but the holding part for the object is small and lightweight, whereas the holding part for testing a sheet is wide and large. It becomes heavy, and the weight may affect the measurement. Therefore, it is difficult to use the structure of a wire material inspection device as is for a sheet inspection device.

The present invention has been made with attention to this point, and will be explained in detail using an illustrated example.
It consists of a pair of sheet holders 2, 2' facing each other, and a tension measuring device 4 that moves linearly with respect to a support base 3. are connected via a flexible joint or a universal joint 6 that does not come off in the axial direction, and this connected sheet holder 2 can freely slide in the joint axial direction with respect to the tension measuring device 4. The gist is inspection equipment.

In the above structure, the seat holder 2, 2' pivots the upper jaw piece 7 to the rear end of the lower jaw piece 8, and the seat holding opening 1
It can be opened and closed freely, and the middle part of the span of the upper jaw piece 7 is pressed by a cam lever 9, and pins 10 and 10' are bored in the lower jaw piece 8, which serve as an opening/closing guide for the upper jaw piece 7 and a contact with the edge of the sheet. One seat holder 2' has its lower jaw piece 8 fixed on an intermediate stand 11 fixed to the support 3 so that it can be moved to a predetermined position, and the other seat holder 2' 2 is a support plate 1 to which a tension measuring device 4 is fixed;
A connecting shaft 13 that is slidably engaged with the tension measuring device 2 and bored rearward is connected to a measuring element 5 of the tension measuring device 4 by a universal joint 6.

The linear movement of the tension measuring device 4 with respect to the support base 3 is as follows:
Parallel sliding bed 14,1 attached to support stand 3
A sliding body 17 is provided with a spiral rod 15 arranged in parallel between the spiral rods 4' and a nut 16 that is screwed onto the spiral rod 15, and is integrated with the support plate 12 to which the tension measuring device 4 is fixed.
This is done by screwing the sliding beds 14, 14' into the nut 16, and applying deceleration to the rotation of the forward/reverse motor 18 to the helical rod 15.

In addition, 19 in the figure is an operation part provided on the front of the support stand 3,
20 is a stroke limit switch, and the sliding stroke of the sliding body 17 is set by an operator 21 attached to the sliding body 17.

Furthermore, among the sheet holders 2 and 2', the one on the fixed side is made to be able to rotate with respect to the intermediate stand 11, and the one on the movable side is made to be able to slide horizontally and perpendicularly to the direction of linear movement. In some cases, the stretched sheet is evenly stretched, and the power source for linear movement may be manual, in which case a handle is provided at the end of the spiral rod. Preferably, the tension measuring device 4 is of the so-called resting needle type, in which the pointer stops at the indicated position.

The above-mentioned device holds one end edge of the paper having a break line such as a perforation hole and the opposite edge with a sheet holder 2,
After that, the cam lever 9 is pushed down and stopped between the inner surfaces of the free ends of the upper jaw piece 7 and the lower jaw piece 8, and the sliding body 17 is used by retreating. At that time, the support plate 1 integrated with the sliding body 17
The tension measuring device 4 fixed to the support plate 2 moves backward, but the sheet holder 2 slidably engages with the support plate 12 and connects with the measuring tip 5 of the tension measuring device 4 fixed to the support plate. Therefore, the tension of the held sheet is applied to the measuring element 5, and this is indicated to the tension measuring device 4. In the present invention, in particular, since the sheet holder 2 is supported movably in the tensile direction with respect to the support plate, the inertia force at the time of breakage is reduced by the lightweight sheet holder 2, and the influence on the tension measuring device 4. Moreover, since the movable sheet holder 2 and the tension measuring device are connected via a flexible joint or a universal joint 6 that does not slide in the tension direction, the sheet holder can be moved up and down with respect to the support plate, or The effect on the tension measuring element due to slight movement in the horizontal direction perpendicular to the tensile direction is corrected, and the breaking line strength of the sheet can be measured extremely accurately.

As described above, since it has a simple structure in which one of the pair of sheet holders is connected to the measuring head of a tension measuring instrument that moves in a straight line, it can be manufactured at an extremely low cost, and it can also be attached to the measuring head of a tension measuring instrument using a flexible joint, etc. Since the sheet holder is connected through the holder, accurate measurement is possible without any measurement error. Therefore, by using such a device, it becomes easy to set the breaking strength according to the paper quality, etc., and the breaking line strength, which has been different depending on the manufacturer as in the past, can be standardized. This facilitates the development of a cutting device that corresponds to the breaking strength displayed on recording paper, etc., and eliminates the drawbacks of cutting at areas other than the broken part caused by variations in strength.

Furthermore, the holding body with a wide clamping opening and a cam lever can quickly hold the edge of the sheet with a simple operation, making it not only easy to use, but also the moving side holding body is supported on a support plate. Therefore, even though this holder is relatively large, its weight is not used in the measuring instrument, and accurate measurement is possible. Furthermore, by utilizing the fact that it is supported on the support plate, the movable side holder can be slightly tilted or moved laterally on the support plate to correct uneven distribution of tension in the sheet.

In addition, an existing tension measuring device equipped with a display can be used as a measuring device, and there is no need to design and incorporate a new dedicated measuring device, making it possible to manufacture the entire device at low cost. Even when using a measuring instrument or adjusting the lateral tilt of the holding body, the vertical and horizontal positional deviations that occur between the measuring instrument and the holding body are absorbed by the universal joint or flexible joint, making it difficult to measure. There is no problem at all. In addition, the fixed-side holder can be adjusted in its forward and backward position on the intermediate stand, so for long sheets, the holder can be moved back and held between the ends, making it possible to inspect sheets of various lengths. It is.

[Brief explanation of the drawing]

The drawing is a schematic diagram of an embodiment of the device of the present invention, and shows the first embodiment of the device.
The figure is an exploded perspective view, and FIG. 2 is a front view. DESCRIPTION OF SYMBOLS 1... Sheet clamping opening, 2, 2'... Sheet holder, 3... Support stand, 4... Tension measuring device, 5... Measuring element, 6... Universal joint.

Claims (1)

[Scope of utility model registration request] In a strength testing device, one of a pair of holders holding both ends of an object to be inspected is moved in the tensile direction, and the tensile strength is measured by a detector installed on the side of the moving holder. The bodies 2 and 2' have a structure in which an upper jaw piece 7 and a lower jaw piece 8 form a wide sheet clamping opening 1 in a horizontal direction perpendicular to the pulling direction, and a cam lever 9 is provided for pressing this onto the upper jaw piece 7. The holding body 2' on the fixed side is fixed to an intermediate stand 11 integrated with the support stand 3 so as to be adjustable in its longitudinal position, and a support plate 12 that moves in the tensile direction is provided on the side of the moving holding body 2.
The moving side holder 2 is supported on the top so that it can slide at least in the tensile direction, and the detector is fixed to the rear upper surface of the support plate 12 as a tension measuring device 4 equipped with a display section, and the tension is measured by This is a sheet breaking line strength testing device in which a measuring element 5 of a measuring instrument 4 and a moving side holder 2 are connected by a flexible joint or a universal joint.