JPH055676Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an antistatic sheet that prevents charging of equipment and devices that are easily charged, such as printing machines and dyeing machines.

[Problems to be solved by conventional techniques and ideas]

When a large amount of static electricity is generated due to the rotation of parts such as rollers and friction with materials, and equipment and devices are charged, this can cause various problems in the product manufacturing process, and even cause malfunctions in measurement and electrical control. It happens.

Therefore, conventionally, various methods and means have been taken to prevent electrical charging of equipment and devices.

For example, they used a method of grounding with a conducting wire, or they were designed so that static electricity could easily be discharged from places where static electricity was easily generated.

However, if such methods and means have not been taken in advance, it is extremely troublesome to add antistatic equipment afterwards.

The present invention provides an antistatic sheet that solves these problems.

[Means to solve the problem]

The gist of the present invention will be explained with reference to the accompanying drawings.

A strip-shaped conductive cloth 3 made of conductive thread 2 is brought into contact with the back surface of a sheet body 1 made of cloth, paper, film, etc., whose length corresponds to the location of use, and the sheet body 1 and the strip-shaped conductive cloth 3 are electrically conductive. Stitching is carried out using a thread 2, and a conductive band 4 in which conductive threads 2 narrower in width than the strip-shaped conductive cloth 3 are densely planted in a fluffy state in the longitudinal direction of the sheet body 1 is exposed on the front and back sides of the overlapping portion of the two. The present invention relates to an antistatic sheet characterized in that it is formed into a shape.

[Effect]

To explain based on the illustrated example, devices and devices that are charged with a large amount of static electricity and cause problems.
When this product is placed over the device 5, static electricity from the device/device 5 is absorbed by induction into the conductive band 4 via the strip-shaped conductive cloth 3, discharged from the conductive band 4 on the front side, or discharged from the conductive band 4 provided at the end. It is grounded via a grounding cord 6 formed by the thread 2, and static electricity that has been or is about to be charged on the equipment/apparatus 5 is removed.

〔Example〕

The drawing shows a case in which two rows of strip-shaped conductive fabrics 3 and conductive bands 4 are formed on a long cloth sheet body 1, but when this sheet body 1 is cut to an appropriate length, a particularly large amount of static electricity is generated. It may be used along the axial direction of the roller, or it may be formed into a ring and used over the entire surface of the device/apparatus 5.

The conductive yarn 2 is an electroless plating yarn in which the yarn is pretreated with a sensitive liquid for electroless plating, and a conductive plating layer is formed by applying electroless plating to the pretreated yarn.

Alternatively, a conductive yarn 2 may be used in which ultrafine metal powder is introduced into a long fiber drawing die and the fine powder is coated on the surface of the yarn to impart conductivity. In this case, when manufacturing the conductive thread 2, if you use a material thread whose fiber surface has been damaged by applying high frequency while passing the material thread between upper and lower opposing gears, the adhesion of the conductive layer may be prevented. Becomes strong.

The strip-shaped conductive cloth 3 shown in the drawings is formed by sewing the conductive threads 2 onto a gauze fabric, or by simply arranging the conductive threads 2 vertically and horizontally at predetermined intervals, forming grid-shaped holes, and fixing them with adhesive. The case is illustrated.

Note that the reference numeral 7 in the figure represents a connecting conductive thread that connects the two rows of conductive bands 4 to each other.

Further, reference numeral 8 is a guide rod for arranging the present product above the equipment/apparatus 5 without contacting it, but of course it may simply be placed over the equipment/apparatus 5 and brought into direct contact with it.

Figures 4 to 7 show the charging characteristics of the product tested at the Niigata Prefectural Technology Center by comparing the product with a simple sheet (ground fabric). This product is 1/
This shows that only 10 was charged.

In other words, in the case of the test sample, the voltage was on the order of 1/10.

Even if a voltage is applied to this product, it will be absorbed by induction or discharged immediately by the strip-shaped conductive cloth 3 or the conductive band 4.
Since the grounding part is grounded via the grounding cord 6, the product is not charged with static electricity, and therefore the device/device 5 that is charged or is about to be charged is not charged with static electricity.
This will sufficiently remove static electricity.

This test was conducted under exactly the same conditions as shown below: the front and back of a simple sheet (base fabric), the front and back of the product
This was done individually on the back.

・Temperature: 20℃ ・Relative humidity: 35% ・Applied voltage: 10kV ・Applying time: 30 seconds ・Applying distance: 25mm ・Power receiving distance: 15mm ・Equipment used Charge decay measuring device Kasuga Denki Co., Ltd. Sweep Memory KM-511 Note that Nos. 4 to 7 The vertical axis of the figure is a comparative charging measurement voltage proportional to the charging voltage, and the horizontal axis is time (seconds).

[Effect of idea]

The present invention is configured as described above and has the following advantages:

1. Since the base is a sheet body, it only needs to be placed on top of equipment/equipment, and it can fit into any shape.

In addition, if it is desired to remove static electricity by discharging without directly contacting the device/device, it can be easily hung or placed above the device/device.

2 Since the conductive bands are on the front and back of the sheet body, they easily absorb static electricity and discharge it, and since the conductive bands are sewn together with electric thread, they have very good static electricity removal properties (grounding properties). .

Moreover, since the conductive band in which the conductive threads are densely planted in a fluffy state is exposed on the front and back surfaces of the overlapped portions, the discharging property is extremely good and static electricity can be easily absorbed and removed.

3. Since the strip-shaped conductive cloth is wider than the conductive band, it is very easy to absorb static electricity.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention. Figure 1 is a diagram of the product in use, Figure 2 is a front view of the product, Figure 3 is a back view of the product, and Figure 4 is a mere sheet. Figure 5 is a diagram of the charging characteristics of the back side of a mere sheet (ground fabric), Figure 6 is a diagram of the charging characteristics of the surface of the proposed product, and Figure 7 is a diagram of the charging characteristics of the surface of the proposed product. It is a charging characteristic diagram. DESCRIPTION OF SYMBOLS 1... Sheet body, 2... Conductive thread, 3... Band-shaped conductive cloth, 4... Conductive band.

Claims (1)

[Scope of utility model registration request] A strip-shaped conductive cloth made of conductive thread is brought into contact with the back side of a sheet body such as cloth, paper, or film that has a length according to the location of use, and the sheet body and the strip-shaped conductive cloth are sewn together with the conductive thread. An antistatic device characterized by forming a conductive band in which conductive threads narrower in width than the strip-shaped conductive cloth are densely planted in a fluffy state in the longitudinal direction of the sheet body by the conductive threads to be sewn, and are exposed on the front and back sides of the overlapping part of both. sheet.