JPH04108162A - Method for detecting fiber-raising direction of pile fabric - Google Patents

Abstract

PURPOSE:To detect the fiber-raising direction of a pile yarn from the vertical displacement of a plate probe having a proper area by contacting the probe with the planted yarn face of a pile fabric under pressure and parallelly moving the probe relative to the fabric. CONSTITUTION:An anvil 5 is made to contact with the base cloth side of a pile fabric and a plate probe 6 with the pile yarn side of the fabric. A spindle operation lever 7 is lowered and the reading of a dial gauge 3 is taken as the standard when the pressure of the probe 6 is balanced with the elastic repulsive force of the pile yarn. The device is moved in a definite direction at a constant speed while keeping the above state. When the moving direction coincides with the raised direction, the pile yarn is fallen with the probe 6 to decrease the thickness of the cloth and the reading of the dial gauge is deflected to minus side from the above standard. On the contrary, the pile yarn is raised when the moving direction is opposite to the raising direction and the cloth thickness is increased to deflect the dial to the plus side. The raising direction can accurately be detected by this process using a commercially available thickness gauge with slight modification.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a detection method for detecting the direction in which pile yarns are raised in a pile fabric in which hair-like pile yarns are implanted in a base fabric.

[Prior Art] In the above-mentioned pile fabric, the pile yarns are normally aligned in a certain direction, but due to some manufacturing reasons, defective areas may occur where the pile yarns are raised in different directions. be. When a fabric with a change in the nap direction is attached to an iron plate or plywood, the difference in appearance between the normal part and the defective part will be noticeable, so such defective parts should be discovered in advance and removed. It is necessary to remove the part or perform appropriate treatment to normalize the direction of the hair. However, in general, there is no big difference between normal and defective parts when the fabric is alone, so it is not easy to find the defective part visually, and it is difficult to tell whether it is normal or not by the feel of the fabric. It required considerable skill.

Therefore, as a detection method for inspecting the quality of the raised state of such pile fabric, for example, Japanese Patent Application Laid-Open No. 63-219675
is proposed.

[Invention tries to solve! Ill In the above detection method, an image of the thread-planted portion captured by a COD camera is processed by a computer, and the thread-planted state of the pile yarn is comprehensively determined. According to this detection method, it is expected that the quality of the nap direction can be detected with some degree of accuracy. However, since the device is large-scale, it seems to require a large space and high equipment and running costs. Furthermore, it is not possible to easily perform inspections at any time.

Therefore, the present invention proposes a detection method that allows anyone to easily detect the direction of raising of pile fabric without using large-scale equipment or expensive equipment.

[Means for Solving the Problems] That is, the detection method according to the present invention involves bringing a flat measuring element having an appropriate area into contact with the thread-planting surface of the pile fabric with a constant pressure, and then moving the measuring element against the pile fabric. It is characterized by detecting the raising direction of the pile yarn from the magnitude of the vertical movement of the probe at that time.

[Function] When the measuring element is moved in a forward direction relative to the pile yarn, the distance from the base fabric to the measuring element becomes smaller than when the measuring element is kept stationary. Conversely, when the measuring element is moved in the opposite direction to the pile yarn, the distance from the base fabric to the measuring element becomes larger than when the measuring element is kept stationary. The reason for this is that the distance from the base fabric to the probe is determined by the balance between the pressure of the probe and the elastic repulsive force of the pile yarn, and in the former case, the pile yarn is pushed down by the probe. In the latter case, it is thought that the pile yarn is caused by the probe.

[Example] In the detection method according to the present invention, a napping direction detection device as illustrated in FIG. 1 is used. This raising direction detection device N
l is a commercially available thickness measuring device that has been modified, and is marked 2 in the figure.
is the frame, 3 is the dial gauge, 4 is the spindle, 5
is an anvil, 6 is a probe, and 7 is a spindle lifting lever. In the illustrated example, the anvil 5 and the probe 6 are each formed into a disc shape with opposing surfaces parallel to each other.

The diameter of both 5 and 6 is 30■■ (area is about 7C■
2), the surface pressure is set to approximately 8.5 gf/cj. This surface pressure is determined by the thickness, type, density, etc. of the pile yarn used. Note that the outer peripheries of the opposing surfaces of the anvil 5 and the probe 6 are chamfered to prevent the pile yarn from getting caught during movement.

During the inspection, an anvil 5 and a pile yarn 1 are placed on the base fabric 11 side.
2. ...Place the probe 6 on each side and press both 5,
6, and lower the spindle lift lever 7 to apply a constant pressure to the probe 6 (FIG. 2(a)). At this time, the pressure of the probe 6 and each pile yarn 12. ... is in balance with the elastic repulsion force, and the dial gauge 3 detects the normal frost thickness to. When the detection device 11 is moved in a certain direction at a constant speed from the above state,
The needle 3a of the dial gauge 3 swings accordingly. When the measuring element 6 is moved in the same direction as the raising direction of the pile yarns 12, -..., the needle 3a becomes negative (-) as shown in Fig. 2(b).
) side, and when the probe 6 is moved in the opposite direction to the napping direction, the needle 3a swings to the plus (+) side as shown in FIG. 2(C). That is, in the former case, the pile yarn 12. ... is pushed down, so that when the measuring head 6 is stationary, the frost thickness 1. becomes thinner, and in the latter case, the pile yarn 1 is
2. ... is caused, so the frost thickness t2 at that time becomes thicker than the frost thickness to. Further, when the measuring element 6 is moved in a direction perpendicular to the direction of raising the nap, the needle 3a hardly swings to either side.

[Effects of the Invention] As is clear from the above explanation, the method for detecting the nap direction according to the present invention can be carried out by using a simple thickness measuring device, so it is inexpensive and can be used by anyone. It is now possible to accurately detect the raising direction of pile fabric with simple operations.

[Brief explanation of the drawing]

Figure 2 is a front view of an example of a napping direction detection device, Figure 2 (a)
), (b), and (c) are diagrams explaining the operation. 1... Raising direction detection device, 3... Dial gauge,
3a... Needle, 4... Spindle, 5... Anvil, 6... Measuring head, lO... Fabric, 11... Pile thread.

Claims (1)

[Claims] (1) While bringing a flat measuring tip with an appropriate area into contact with the thread-planting surface of the pile fabric with a constant pressure, move the measuring tip relatively along the pile fabric, and then move the measuring tip up and down. 1. A method for detecting the raising direction of a pile fabric, the method comprising detecting the raising direction of a pile yarn from the magnitude of the movement.