JPH0716189U - Portable needle detector for sewing - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a portable needle detector for sewing, which enables swift and high-speed range identification with a needle detector, and easy visual inspection and removal of needles in the specified range. [Structure] Portable sewing needle detector 1 for detecting a sewing needle mixed in a sewn product by a metal detection sensor 20
The sensitivity of the meter reading sensor 20 is variable.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a portable needle detector for sewing that detects a sewing needle mixed in a finished sewn product in the final step of manufacturing the sewn product.

[0002]

[Prior art]

 At garment factories, etc., a meter check is performed as one of the final checks of sewn products that have been completed through each process.

This is because match needles and broken needles may be mixed in sewn products such as clothing during the manufacturing process, and even if sufficient care is taken, it is impossible to avoid them completely. Therefore, this meter-reading work needs to be necessary and complete, and various kinds of meter-readers using metal detection have been conventionally used for these meter-reading.

One of them is a handy type needle detector in which the whole shape is composed of a handle to be held in the hand and a meter-reading portion located at the tip of the handle, and the needle-reading portion has a built-in magnetic sensor. It is provided. This is, for example, moving left and right on a sewn product that has been spread on a workbench, etc., and this is repeated in a zigzag manner to try to read the entire meter (Fig. 5). In other words, when a metal needle or the like enters the horizontal band-shaped scanning band drawn by the sensor (Fig. 6), it is detected and mixed with the buzzer and lamp attached to the needle detector. Notify where you are.

The probability of detecting the needle by one movement of the needle detector increases as the scanning band becomes wider. However, in more detail, it does not actually detect the needle, but specifies the area in the vicinity where the needle is hidden, and by visually inspecting again within the specified range. Finally, the needle can be removed.

[0006]

[Problems to be Solved by the Invention] As described above, in order to actually find one needle or the like, first identify the hidden area of the needle with the needle detector, and then identify the needle within that area. There are two steps that must be taken, such as a visual investigation of.

However, focusing on these two steps, the following can be said. In order to facilitate the first step, "range specification", the scanning band by the needle detector should be widened, but if it is widened, the range of the "visual inspection" in the second step will be widened, and the needle will be searched. It's not that easy. Considering that the target object is a small needle in particular, it is a task that needs to be reduced as much as possible due to the troublesomeness of visual investigation and the difficulty of discovery.

Therefore, in order to facilitate the visual inspection, it suffices that the range specified by the meter is narrow, and for that purpose, the scanning band of the meter should be narrowed to specify the range. . However, this makes it difficult to specify the range.

As described above, the two-step work that is performed until one needle is located has a conflicting relationship in that whichever one is easy, the other is always difficult. And this correlation is requested by the width of the scanning band, that is, the sensitivity of the meter. In that respect, the sensitivity of conventional needle detectors was constant, and the range was simply determined by empirical validity.

The present invention has been made in view of the above circumstances, and an object of the present invention is to quickly and accurately identify a range by a needle detector and to visually observe a needle in the specified range. (EN) Provided is a portable needle detector for sewing which can be easily searched and removed.

[0011]

[Means for Solving Problems]

 As a means for solving the above problems, the present invention provides a portable sewing needle detector that detects a sewing needle mixed in a sewn product by a metal-detecting sensor, which has a variable sensitivity. The content is "a portable needle detector for sewing, which is characterized by things".

[0012]

[Action]

 By adopting the above means, the following effects can be obtained. Since the sensitivity of the meter can be made variable, the width of the scanning band by the meter can be changed. By utilizing this action, the work from detecting one needle to finishing the removal can be performed as follows.

First, since the location of the needle is not known at first, the scanning range is wide for the entire sewn product, but by making the needle detector highly sensitive, the scanning band is also widened, so that the range can be specified quickly. . However, this identified range is still too wide for a visual investigation. Therefore, the sensitivity of the needle detector is then lowered and the narrow scan band is scanned again within the previously specified range.

Since the scanning range is narrowed this time, the re-identification can be performed immediately even if the scanning band is narrow. Moreover, the specified range is narrower, and is so narrow that the needle can be found immediately by visual inspection.

In this way, it is possible to narrow down the meter-reading work by the meter-reading device in two stages. Therefore, the direct function of the conventional meter was to specify the range, but the function of the present invention brought the meter reading function closer to the function of specifying the needle itself.

[0016]

【Example】

 An embodiment of the invention described above will be described below. In this embodiment, as shown in FIG. 1, a sensor 20 for detecting a needle and the like and a meter reading circuit 30 for electrically detecting the detection as described later are the main components, and these are the case 10 of the meter reading device. It is stored in.

First, the case 10 will be described first. The case 10 is composed of a handle 11 for holding the meter 100 in its entirety and a meter-reading portion 15 located at the front end of the handle 11. For example, the handle 11 and the meter-reading portion 15 are It is, so to speak, a positional relationship like the body and head of a Kokeshi doll. The handle 11 is gripped, and the meter-reading portion 15 corresponding to the head is used for meter-reading work. The shape of the handle 11 has a constriction. Therefore, when the handle 11 is grasped loosely without being firmly held, there is play between the hand and the handle 11 and it is easy for the hand to fall off during work, but this can also be prevented by this constriction. The handle end 12 is provided with a protrusion-shaped non-slip member 13, and the width of the handle 11 is slightly narrowed even though it can be grasped by a female hand.

Next, the sensor 20 will be described. The sensor 20 is housed inside the meter reading unit 15 of the case, and is composed of a magnet 21 and a coil 22. The magnetic force line A by the magnet 21 is in the vertical direction in FIG. 1, and the magnetic force line A is disturbed by the relative movement of the metal object below the sensor 20. This disturbance causes a minute current in the coil 22, and this minute current is detected by the meter reading circuit 30 described later.

Next, the processing by the meter reading circuit 30 will be described with reference to FIG. First, the minute current generated in the coil 22 by detecting the metal is amplified by the differential amplifier 37 of the meter reading circuit 30. At this time, the sensitivity switch 34 can select the degree of amplification in one of two levels, large and small, and as a result, the sensitivity of the sensor 20 is switched. The amplified current is extracted after the miscellaneous signals are removed by the filter 38, and is recognized as a current by metal detection by the comparison unit 39. Based on this recognition, the lamp 36 and the buzzer 35 notify the detection.

The main component configuration and the layout of the meter reading circuit 30 are as follows. First, the circuit board 31 of the meter reading circuit 30 is housed in the center of the handle 11, and the power source battery 32 is housed in the handle butt 12. A power switch 33, a sensitivity switch 34, and a buzzer 35 are provided above the case near the joint between the handle 11 and the meter reading unit 15. It should be noted that the two switches are in positions where the fingers can reach without re-grip when the operator grips the handle 11. Further, the lamp 36 is provided at the tip of the meter reading unit 15, and its blinking is synchronized with the operation of the buzzer 35.

Now, the meter reading work according to the embodiment of the present invention realized as described above will be described as follows.

First, the sewn product to be meter-read is spread on, for example, a workbench. Next, hold the meter 100 of the embodiment with one hand and turn on the power switch 33. Further, the switching sensitivity switch 34 is set to high sensitivity. Next, while moving the needle detector 100 to the left and right, the sewing product is scanned in a zigzag manner. Since the scanning band is wide, the number of movements is small. Generally, in the case of manual work, the distance between the sewn product and the meter-reading device 100 fluctuates in various distances. However, because of the high sensitivity, leaks of meter reading due to excessive separation are less likely to occur than in the past.

While moving several times, the buzzer 35 sounds and the lamp 36 lights up to notify the detection of the needle. However, there is a detection reaction even at a position slightly deviated from the detected position, and the needle cannot be specified. Therefore, this time, the sensitivity switch 34 is switched to low sensitivity with a finger. At this time, since the sensitivity switch 34 is located near the finger, the switching operation can be performed without re-gripping.

This time, the meter detector 100, which has been switched to the low sensitivity, detects the meter within the previously specified range. Since the scanning range is narrowed, there is a second detection reaction immediately. Moreover, the detected location is closer to the point than the surface, and the needle can be visually confirmed. This works particularly well for sewn products with metal objects, for example, for meter reading of clothing with metal buttons. In other words, even if the needle is left near the metal button, it was difficult to identify it with the conventional needle detector by equating it with the metal button. However, because the location was closer to the point, it became possible to distinguish between the close metal button and the needle individually.

Now, although the confirmed needle is pulled out with both hands, the needle detector 100 has a slender handle 11, so that the needle can be pulled out even while being grasped. After the removal is completed, switch the sensitivity switch with your finger again and repeat the above series of operations.

[0026]

【The invention's effect】

 Due to the operation of the present invention, the area where needles and the like are mixed in the sewn product can be specified quickly with high accuracy, and the final detection and removal work by visual inspection from the specified area is facilitated. You can do it.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a portable needle detector for sewing according to the present invention.

FIG. 2 is a plan view of the needle detector shown in FIG.

FIG. 3 is a perspective view of the needle detector shown in FIG. 1.

FIG. 4 is a block diagram of a detection circuit of the meter detector shown in FIG.

FIG. 5 is a schematic diagram showing a locus of movement of a meter during a meter reading operation.

FIG. 6 is a schematic diagram showing a scanning band due to movement of a sensor.

[Explanation of Codes] 100 Meter Detector 10 Case 11 Handle 12 Handle Bottom 13 Non-slip 15 Needle Meter 20 Sensor 21 Magnet 22 Coil 30 Meter Reading Circuit 31 Circuit Board 32 Battery 33 Power Switch 34 Sensitivity Switch 35 Buzzer 36 Lamp

Claims (1)

[Scope of utility model registration request] 1. A portable sewing needle detector for detecting a sewing needle mixed in a sewn product by a sensor sensor for detecting metal, wherein the sensitivity of the sensor is variable. Needle meter.