JP2010139426A - Cutting tester of backing paper for wallpaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutting tester of backing paper for wallpaper allowing a cutting test of backing paper for wallpaper to be stably performed without being influenced by the experience or skill of a worker, enhancing the accuracy of a test result, and improving objectivity thereof. <P>SOLUTION: With a cutting knife 2 for cutting a specimen S held by a knife holder 10, the specimen S is cut while lowering the knife holder 10, with the specimen S held by being sandwiched between a pair of plate materials, a back plate 21 and a pre-plate 22, constituting a specimen holding plate 20. Since the cutting knife 2 is held at a prescribed angle by the knife holder 10, cutting can be performed with a cutting angle kept unchanged relative to the specimen S. If the knife holder 10 is used together with a tensile tester such as a Tensilon tester, cutting can be performed by moving the cutting knife 2 at a constant speed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cutting test apparatus for a backing paper of a wallpaper in which a resin film such as vinyl chloride is coated on a paper backing paper before the resin film is coated.

  Wall paper is attached to the surface of a substrate such as a gypsum board constituting the wall of the building for the purpose of decoration, contamination prevention, and the like on the wall surface of a building such as a residential house. This type of wallpaper is composed of a plurality of layers in which a paper backing paper is covered with a resin film such as vinyl chloride. Various colors and patterns are printed on the resin film to decorate the wall.

  When pasting wallpaper on a substrate such as a wall, the rolled-up wallpaper brought into the construction site is cut into a size suitable for construction. The wallpaper is manufactured in a standard size, and it is difficult to prepare a wallpaper that covers the entire surface of the wall, and the long-sized wallpaper wound around the core is brought into the construction site. Because. For this reason, a long wallpaper is cut into an appropriate size according to the wall surface to be constructed. Glue the back of the cut partial wallpaper and leave it in a timely manner until the glue soaks and stabilizes. Note that the back side to be glued is the glued surface of the backing paper. The partial wallpaper is temporarily attached to the substrate in a horizontal or vertical direction. At this time, if the edges of the adjacent partial wallpapers are slightly overlapped, and the edges of any of the overlapping partial wallpapers are cut with a knife, these end faces coincide with each other. When attached to the substrate, the wallpaper is attached to the substrate, and the wall surface is covered with the wallpaper.

  In the above-mentioned wallpaper construction, if the cut end of the part to be cut in a temporarily attached state is clean and not wavy but wavy, the end faces of adjacent partial wallpapers match. Without this, gaps are formed between the partial wallpaper, which may result in poor construction.

  There are various causes of poor construction, and one of the causes is considered to be poor cutting performance of the backing paper. In order to prevent poor construction, wallpaper manufacturers make a cutting test on the produced wallpaper and judge whether the cutting performance is good or not in the state of the cut edge. When the cause of the poor cutting performance is the backing paper, the result is notified to the manufacturer of the backing paper, for example, a paper manufacturer, and improvement is required.

  In paper makers, various attempts have been made to improve the cutting performance. For example, Patent Document 1 and Patent Document 2 disclose backing paper for paper or processed paper that is intended to improve dimensional stability. Yes.

JP2008-88579 JP2008-190080

  The paper quality of the backing paper is being gradually improved, and the cutting performance as a backing paper for wallpaper is also being improved. However, since the cutting performance of the backing paper to be produced varies depending on the production lot, it is necessary for a paper manufacturer to perform a test for evaluating whether cutting performance is good or bad.

  The conventional cutting test for inspecting the cutting property is performed as follows. After the produced backing paper is coated with a vinyl chloride film to produce a wallpaper, a sample of a desired size is cut out from the wallpaper, and immersed in water or a glue solution used during construction for a certain period of time. Allow it to stand on a flat table for a certain period of time to absorb moisture or glue solution. Thereafter, the upper end of the sample is gripped and hung, and a knife is inserted from the appropriate position of the upper end to the coated surface side where the resin film is to be adhered. The sample is cut while moving the knife downward with the angle kept substantially constant. Then, by visually observing the fluffing state between the cut edge and the cut end portion on the glue surface side attached to the substrate of the sample wall body, the cutting condition of the sample is confirmed to confirm the cutting condition. Judgment of sexual quality is made.

  However, since the operator moves the knife while holding the sample and cuts the sample, it is difficult to keep the angle between the knife and the coated surface of the sample constant, and it may not be possible to cut the sample under certain conditions. In addition, since the sample is in a state of being hung with its upper end being gripped, by cutting the knife while pressing the knife against the sample, the sample escapes backward, and the cutting part is The cutting state becomes non-linear and the cutting state becomes non-uniform, and there is a possibility that an accurate determination cannot be made. Furthermore, since it is a manual operation by an operator, skill is required, individual differences are likely to occur, and there is a possibility that uniform judgment cannot be performed.

  Therefore, the present invention provides a wallpaper backing paper cutting test apparatus capable of stably cutting a sample without requiring skill so that the judgment of the cutting property for the sample can be made uniformly. It is intended to provide.

  As a technical means for achieving the above-mentioned object, the wallpaper backing paper cutting test apparatus according to the present invention uses a knife to cut a sample cut from wallpaper produced by coating a resin film on the backing paper, and the cut end In the paper backing paper cutting test apparatus that evaluates the cutting quality of the backing paper by cutting, a sample holding plate made of a pair of plate members for holding the sample, and cutting for cutting the sample held on the sample holding plate And a knife holding device that holds and holds the cutting knife, and the sample is cut with the cutting knife while the knife holding device is lowered with respect to the sample holding plate. It is said.

  When the knife holding device is lowered while the cutting knife held by the knife holding device is inserted into the sample while the sample is held on the sample holding plate, the sample is cut by the cutting knife. Since the cutting knife is held by the knife holding device, the angle of the blade edge with respect to the sample does not change, and if the knife is lowered at a constant speed, a cut state cut under a certain condition can be obtained.

  Further, the wallpaper backing paper cutting test apparatus according to the invention of claim 2 is characterized in that the knife holding device is positioned on the back side of the sample, angle adjusting means for changing a cutting angle of the cutting knife with respect to the sample. And a backing plate for receiving the sample, and the cutting edge of the cutting knife faces the backing plate.

  When the cutting knife is held by the knife holding device, the angle adjusting means adjusts so that the cutting angle of the cutting edge of the cutting knife with respect to the sample becomes an appropriate angle. When the sample is cut with the cutting knife while the knife holding device is lowered, the sample is not pressed against the backing plate so that it does not escape backward.

  According to a third aspect of the present invention, there is provided a cutting test apparatus for backing paper for wallpaper, wherein the sample holding plate is suspended by a hanging metal fitting attached to a load detector of a tensile tester, and the knife holding device is attached to the tensile tester. The knife holding device and the sample holding plate are held in a driving unit, and are used in a tensile tester. The sample is cut with the cutting knife while the knife holding device is lowered by the operation of the driving unit.

  In order to lower the knife holding device in order to cut the sample with the cutting knife, the knife holding device can be supported at a part different from the sample holding plate, and the operator can hold the knife holding device and pull it down. In this case, the angle of the cutting knife with respect to the sample is maintained, but cutting in the vertical direction may be affected by the skill of the operator. For this reason, if a knife holding device can be lowered using power sources, such as a motor and a cylinder, a cutting line can be made into the perpendicular direction. Therefore, the cutting knife is moved using a tensile tester. For example, since a paper manufacturer has a Tensilon tester as a tensile tester for testing the tensile strength of manufactured paper, a sample, that is, a sample in which a sample is held in a weighted detector of the Tensilon tester The holding plate is connected and suspended, and the knife holding device is connected to the drive unit. When the Tensilon testing machine is operated, the knife holding device is lowered by the operation of the driving unit, and the cutting knife is lowered. As a result, the sample is cut with the cutting knife.

  According to the wallpaper backing paper cutting test apparatus of the present invention, when the cutting knife is held by the knife holding device, the knife holding device is not inclined when the sample is cut by the cutting knife. The sample can be cut with the cutting knife maintained at a constant angle with respect to the sample. Therefore, skill is hardly required for the cutting operation of the sample.

  Moreover, according to the cutting test apparatus for wallpaper backing paper according to the invention of claim 2, by adjusting the angle of the knife for cutting, the sample is brought closer to the cutting state when the wallpaper is actually applied. Therefore, it is possible to evaluate the cutting property with high accuracy. Also, when cutting the sample, the sample will not escape backwards, so it can be cut reliably, and the cut end must be finished to a state where it can be used for evaluation of cutting quality. It is possible to improve the accuracy of the evaluation of the cutting property.

  According to the wallpaper backing paper cutting test apparatus according to the third aspect of the invention, since the knife holding device can be lowered in a fixed state, the cutting knife is maintained in a fixed state to cut the sample. can do. For this reason, the sample can always be cut under a certain condition, and the evaluation of the cutting property can be performed under uniform conditions, and the evaluation with high objectivity can be performed.

  Hereinafter, the wallpaper backing paper cutting test apparatus according to the present invention will be described in detail based on the illustrated preferred embodiment.

  FIG. 1 is a schematic perspective view for explaining a state in which a cutting test of a sample S is performed by the wallpaper backing paper cutting test apparatus 1 according to the present invention, and FIG. 2 shows a side view of the cutting test apparatus 1. . The cutting test apparatus 1 mainly includes a knife holding device 10 that holds a cutting knife 2 and a sample holding plate 20 that holds a sample S.

  The knife holding device 10 includes a gantry frame 11, a knife frame 12 supported by the gantry frame 11, and a backing plate support rod 13 attached to a rear end portion of the gantry frame 11. At the upper end of the backing plate support rod 13, the backing plate 14 adjusts the position of a pair of nuts 13a and 13b that support the backing plate 14, thereby making the longitudinal length of the backing plate support rod 13 longer. It is attached so that the position of the direction can be adjusted.

  The gantry frame 11 is formed in a cavity from the front end side to an appropriate position, and an opening 11a connected to the cavity is formed in the front end part. On the other hand, the knife frame 12 is formed in a substantially U shape, and a lower leg portion 12a of the U shape is inserted into the cavity from the opening 11a and held by the gantry frame 11. Thereby, the knife frame 12 is moved relative to the gantry frame 11 in the left-right direction and the direction orthogonal to the paper surface in FIG. 1 so that the position relative to the gantry frame 11 can be adjusted. After the adjustment, the position of the knife frame 12 with respect to the gantry frame 11 is fixed by tightening the fixing nut 11b. Further, on the lower surface of the gantry frame 11, a testing machine mounting portion 11c for mounting the cutting test device to a load detector of a Tensilon testing machine as a tensile testing machine is attached. In the Tensilon tester, the weight applied to the sample by the weight detector can be recorded with a weight signal output from the weight detector.

  A mounting plate 15 bent in a substantially L shape is mounted from the upper U-shaped leg 12b of the knife frame 12 to the body 12c. In the cutting test, the sample holding plate 20 is not inadvertently shaken by rubbing the tip of the leg 12b with the surface of the sample holding plate 20. For this reason, in order to reduce the frictional force between the leg portion 12b and the sample holding plate 20, the tip surface of the leg portion 12b has an uneven shape, and the tip of the convex portion has an arc shape. A support shaft 15a is attached to the bent portion of the mounting plate 15, and a knife plate 16 is connected to the support shaft 15a so that the knife plate 16 swings about the support shaft 15a. Further, an attachment plate 17 is attached to the knife plate 16, and the cutting knife 2 is detachably attached to the attachment plate 17.

  As shown in FIG. 1, the cutting knife 2 is bent up at one end side of the mounting plate 17 so that a commercially available so-called cutter knife can be used. 18 is attached, and the cutting knife 2 is held on the holding plate 18.

  An angle adjustment screw 19 is provided so as to be screwed to the leg portion 12b. When the angle adjustment screw 19 is rotated, the amount of protrusion upward from the leg portion 12b is changed according to the rotation direction. It is. The upper end portion of the angle adjusting screw 19 is connected to the knife plate 16 so as to be rotatable and swingable by a universal bearing such as a spherical bearing. A knob 19a is attached to the lower end of the angle adjusting screw 19, and the angle adjusting screw 19 can be rotated by holding the knob 19a.

  As shown in FIG. 3, the sample holding plate 20 is configured such that two plates overlap each other, the rear back plate 21 is made of metal or synthetic resin, and the front front plate 22 is light transmissive. It is made of a material having properties. The back plate 21 and the front plate 22 are appropriately connected at one end to be opened and closed. Further, at the center of the back plate 21 and the front plate 22 and along the direction in which the cutting knife 2 moves for cutting, as will be described later, at a position that coincides when these are closed. Cutting long holes 21a and 22a each having a long hole whose direction is the longitudinal direction are formed. In the embodiment shown in FIGS. 1 and 3, the width of the cutting long hole 22a is larger than the width of the cutting long hole 21a so that the cutting knife 2 can be smoothly moved. The width of the cutting long hole 22a formed in the mounting plate 22 may be large enough to insert the cutting edge of the cutting knife 2 and is smaller than the width of the cutting long hole 21a. It doesn't matter. Further, for example, a clip means or the like is disposed on the end edge of the side where the back plate 21 and the front plate 22 are in close contact with each other in a closed state. Further, at the center of the upper end portions of the back plate 21 and the front plate 22 and at a position that coincides when these are closed, as will be described later, a suspension for hanging the sample holding plate 20 is suspended. Hanging through holes 21b and 22b for engaging the lowering tool are formed. Note that the centers of the suspension through holes 21b and 22b and the centers of the cutting long holes 21a and 22b are located on the same line. In addition, a plurality of guide lines 21c are engraved on the back plate 21 in parallel with the cutting long holes 21a. An insertion groove 11d into which the lower end portion of the sample holding plate 20 in a state where the back plate 21 and the front plate 22 are superposed can be inserted in the upper surface of the gantry frame 11. In preparation for the cutting test, the lower end portion of the sample holding plate 20 is inserted into the insertion groove 11d, so that the positioning of the sample holding plate 20 and the cutting knife 2 can be easily performed. When the cutting test is started, the sample holding plate 20 is detached from the insertion groove 11d, and then the connection is released. When the cutting test is performed, the sample holding plate 20 is brought into contact with the backing plate 14 and guided. . For this reason, when the positioning of the sample holding plate 20 and the cutting knife 2 or the like can be easily performed at the time of preparation for the cutting test, it is not necessary to extend the lower end of the sample holding plate 20 until the frame 11 is reached. It is sufficient if it extends to the range required for the test. In this case, the insertion groove 11d is unnecessary.

  An operation for performing a cutting test on the sample S cut out from the backing paper manufactured by the wallpaper backing paper cutting test apparatus according to the present invention configured as described above will be described below. In addition, this cutting test apparatus is made to be able to perform the cutting test of the sample S by using it for a tensile tester, and the case where it uses for the Tensilon tester as a tensile tester is demonstrated.

  In preparation for the cutting test, a wallpaper is produced by coating a backing paper to be subjected to the test with a vinyl chloride film, and a sample S cut out from the wallpaper to a desired size is used in water or for the glue used for construction. After being immersed in the solution for a certain time, it is taken out and left on a flat table for a certain time to absorb moisture. The sample S is held between the back plate 21 and the front plate 22 of the sample holding plate 20. The knife holding device 10 is attached to the drive side of the Tensilon tester by the tester attachment part 11c. Further, as shown in FIG. 1, the latch member 25 suspended from the weight detector of the Tensilon tester is inserted into the suspension through holes 21b and 22b of the sample holding plate 20 holding the sample S. The sample holding plate 20 is suspended. At this time, the lower end of the sample holding plate 20 is inserted into the insertion groove 11d of the gantry frame 11. The knife holding device 10 attached to the Tensilon tester is adjusted to be horizontal. Further, when recording the weight signal output from the weight detector, zero point adjustment of the recorder and calibration with a weight are performed.

  The position of the knife frame 12 relative to the gantry frame 11 is adjusted so that the tip of the cutting knife 2 faces the cutting long hole 22a of the sample holding plate 20. Further, the angle of the cutting knife 2 is adjusted according to the cutting conditions of the test performed on the sample S. This adjustment can be performed by rotating the angle adjusting screw 19. Then, the cutting knife 2 is protruded and stabbed into the sample S. At this time, if a cut or the like is formed in the sample S in advance, the cutting knife 2 can be easily pierced.

  When the Tensilon tester is operated, the knife holding device 10 attached to the drive side is lowered. Thereby, the sample S is cut while the cutting knife 2 is lowered. At this time, since the backing plate 14 is also lowered with the lowering of the knife holding device 10, the cutting knife 2 is always facing the backing plate 14, so that the sample S escapes backward. There is no end. When the cutting knife 2 is moved down to a desired position and the cutting of the sample S is completed, the cutting knife 2 is taken out from the sample holding plate 20 and the cut by the cutting knife 2 is visually observed. In addition, by cutting and observing one sample S at two or more locations, it is possible to evaluate the cutting property with higher accuracy. Further, when the weight is measured by the weight detector and the output signal is recorded, the average value of the measured values can be used for the evaluation of the cutting property, and the objectivity of the evaluation can be further improved. .

  In the embodiment described above, it has been described as a cutting tester for a wallpaper in which a backing film for wallpaper is coated with a vinyl chloride film, but when evaluating the cutting ability of only the backing paper for wallpaper, It can also be used for other papers that need to be cut.

  According to the cutting test apparatus for wallpaper backing paper according to the present invention, the cutting knife can be cut while maintaining a constant angle with the cutting knife with respect to the sample. This contributes to highly accurate evaluation of the quality of the product. In addition, by using the tensile tester to move the cutting knife, stable cutting can be performed, which contributes to more accurate evaluation.

It is the perspective view explaining operation which cuts a sample with the cutting test device of the backing paper for wallpaper concerning this invention, and the state where it used for the tensile testing machine is shown. It is a side view which shows schematic structure of the cutting test apparatus of the backing paper for wallpaper which concerns on this invention. It is a perspective view explaining the sample holding plate holding a sample.

Explanation of symbols

1 Cutting test device 2 Cutting knife
10 Knife holding device
11 Mounting frame
12 Knife frame
13 Backing plate support rod
14 Backing plate
16 Knife plate
17 Mounting plate
18 Retaining plate
19 Angle adjustment screw
20 Sample holder
21 Back plate
21a Long hole for cutting
21b Hanging through hole
21c guide wire
22 Front plate
22a Long hole for cutting
22b Through hole for suspension S Sample

Claims (3)

In a cutting test apparatus for wallpaper backing paper, a sample cut out from a wallpaper produced by coating a resin film on a backing paper is cut with a knife, and the quality of the cutting of the backing paper is evaluated by the cut edge.
A sample holding plate made of a pair of plate members for sandwiching the sample;
A cutting knife for cutting the sample held on the sample holding plate;
A knife holding device that holds and holds the cutting knife;
A paper-sheet backing paper cutting test device, wherein the sample is cut by the cutting knife while the knife holding device is lowered with respect to the sample holding plate. The knife holding device is
An angle adjusting means for changing a cutting angle of the cutting knife with respect to the sample;
A backing plate positioned on the back side of the sample and receiving the sample;
2. The wallpaper backing paper cutting test apparatus according to claim 1, wherein a cutting edge of the cutting knife faces the backing plate.   The sample holding plate is suspended by a hanging metal fitting attached to a load detector of a tensile tester, and the knife holding device and the sample holding plate are held by the driving unit of the tensile tester, thereby the tensile tester 3. The wallpaper backing paper cutting test device according to claim 1, wherein the sample is cut with the cutting knife while the knife holding device is lowered by the operation of the driving unit.

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