JP2015222661A - Antistatic cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antistatic cover capable of enhancing the antistatic reliability of a tube, while ensuring the internal visibility of the tube when covering an insulating resin tube, and also capable of facilitating mount and demount on and from the tube.SOLUTION: A cylindrical cover body 10 that can be fitted over a tube 2 is divided at one place in the circumferential direction so that a first division part 11 and a second division part are formed and elastically deformed. The cover body is configured to deform elastically so that the first division part and second division part are separated, and the tube can be passed between the first division part and second division part. The cover body has a plurality of notches 17, 17, ... penetrating at least one of the first division part and second division part in the radial direction of the cover body, and can expose at least a part of the tube through the plurality of notches when fitted over the tube.

Description

  The present invention relates to an antistatic cover for preventing charging of an insulating resin tube.

Conventionally, when a flammable fluid (electrical insulating fluid) such as an organic solvent flows through an insulating resin tube, the tube is easily charged by friction between the flammable fluid and the tube. Further, even when the insulating resin tube is rubbed with a glove for a clean room in a factory or the like where the insulating resin tube is used, the tube is easily charged.

Therefore, as an antistatic means for preventing the charging of the insulating resin tube, a means for providing the tube with a conductive substance such as graphite or metal fine powder is adopted in order to impart conductivity to the insulating resin tube. It had been. For example, in a fluororesin tube (insulating resin tube) described in Patent Document 1, a conductive portion containing a conductive substance is provided on the outer peripheral surface of a tube body made of a transparent portion to ensure visibility. It was.

However, in the fluororesin tube described in Patent Document 1, since the conductive portion extends in a stripe shape along the longitudinal direction of the tube body, depending on the installation situation of the tube, the combustible fluid When the flow rate is small, there is a possibility that the conductive portion cannot be positioned at a necessary portion of the tube with respect to the flammable fluid, and the antistatic function cannot be sufficiently exhibited.

Moreover, since the technique described in Patent Document 1 uses a configuration in which a conductive substance is contained in the tube, that is, uses a configuration in which the tube itself has conductivity, a fluororesin (insulating property) An antistatic function could not be imparted to an existing tube made only of a resin.

JP 2003-4176 A

The present invention has been made in view of such circumstances, and when covering an insulating resin tube, it is possible to improve the reliability of anti-static of the tube while ensuring the visibility inside the tube. And it aims at provision of the antistatic cover which can aim at the easy attachment or detachment to the said tube.

The invention according to claim 1 is an antistatic cover for covering a transparent or translucent insulating resin tube, which is made of a resin composition containing a conductive material, and is a cylindrical cover body that can be fitted over the tube. And the cover body is divided at one place in the circumferential direction so that the first divided portion and the second divided portion are formed, so that the first divided portion and the second divided portion are close to or separated from each other. The cover body is elastically deformed so as to separate the first divided portion and the second divided portion, and the tube is formed between the first divided portion and the second divided portion. The cover main body has a plurality of cutout portions penetrating at least one of the first divided portion and the second divided portion in the radial direction of the cover main body, When it is externally fitted to the tube, Notch in which is configured to be able to expose a portion of the tube through the.

According to this configuration, when the antistatic cover is attached to or detached from the tube, the cover body is elastically deformed so as to widen the space between the first divided portion and the second divided portion, and the tube body It is possible to cover or remove from one side. Therefore, it becomes easy to attach and detach the antistatic cover to the tube regardless of whether the tube is an existing tube before being installed at a predetermined position in a factory or the like. Therefore, the attachment / detachment of the antistatic cover to the tube can be facilitated.

Further, since the elastic deformation of the cover main body is used for attaching / detaching the antistatic cover to / from the tube, the antistatic cover is attached to the tube having an outer diameter substantially the same as the inner diameter of the cover main body. In addition to attaching and detaching, a thick tube having an outer diameter larger than the inner diameter of the cover main body can be attached and detached within a predetermined allowable range. Therefore, the antistatic cover can be used for a plurality of tubes having different outer diameters instead of a single type of tube having a predetermined outer diameter.

Furthermore, after the antistatic cover is attached to the tube, the tube can be covered over a wide range with the cover body relatively without interruption. Moreover, since the tube 2 is the thick tube, even if the entire circumference cannot be covered with the cover body, the cover body is rotated relative to the tube so as to cover the necessary portion of the tube. As a result, even if the fluid is biased in the tube due to the installation state of the tube and the flow rate of the fluid, the tube 2 can be reliably discharged. Therefore, it is possible to increase the certainty of antistatic of the tube using the antistatic cover.

Further, since the plurality of notches are provided in the cover body, the antistatic cover can be bent. Therefore, for example, even if the tube is an existing tube installed at a predetermined position in a factory or the like in a bent state, the antistatic cover can be easily attached while being bent in accordance with the tube.

In addition, when the tube is covered with the antistatic cover, a part of the transparent or translucent tube can be exposed through the plurality of notches. Therefore, after the tube is covered with the antistatic cover, the state in the tube (for example, the clogging state or the flow direction of the insulating fluid) can be visually recognized using the plurality of notches.

The invention according to claim 2 is the antistatic cover according to claim 1, wherein the cover body has a plurality of through holes penetrating in the radial direction of the cover body and is externally fitted to the tube. A part of the tube can be exposed through the plurality of through holes.

According to this configuration, when the tube is covered with the antistatic cover, a part of the transparent or translucent tube can be exposed through the plurality of through holes. Therefore, after the tube is covered with the antistatic cover, the state in the tube can be visually recognized using the plurality of through holes. Therefore, the visibility inside the tube when the antistatic cover is used can be enhanced.

According to a third aspect of the present invention, in the antistatic cover according to the first or second aspect, the cover body is formed in a cylindrical shape in a state where the first divided portion and the second divided portion are overlapped. It is what has been.

According to this configuration, it is possible to expand the change range of the inner diameter (the radial width on the inner peripheral side) that the cover body can take by elastic deformation. Therefore, the antistatic cover can be used for many types of tubes having different outer diameters.

According to a fourth aspect of the present invention, in the antistatic cover according to any one of the first to third aspects, a rounding process is performed on a closed portion of at least one of the plurality of cutout portions. It is what has been.

According to this configuration, at least one winding portion capable of winding a metal wire such as a copper wire connected to the ground wire can be formed in the vicinity of the closing portion of the cover body. And when the said metal wire is wound around the said winding part, it can prevent that the said metal wire damages the said obstruction | occlusion part which contacts this, and can make it difficult to damage the said charge protection cover.

According to a fifth aspect of the present invention, in the antistatic cover according to any one of the first to fourth aspects, a chamfering process is performed on each opening edge of the plurality of notches. .

According to this configuration, when the antistatic cover is attached to or detached from the tube, the tube can be hardly damaged due to contact between the band cover main body and the tube.

According to the present invention, when the insulating resin tube is covered, it is possible to improve the reliability of the antistatic of the tube while ensuring the visibility of the inside of the tube, and to facilitate the attachment / detachment to the tube. It is possible to provide an antistatic cover capable of achieving the above.

It is a figure which shows the use condition of the antistatic cover which concerns on one Embodiment of this invention. It is a front view of the antistatic cover of FIG. It is a side view of the antistatic cover of FIG. It is a top view of the antistatic cover of FIG. It is a bottom view of the antistatic cover of FIG. It is an expanded view of the antistatic cover of FIG. It is a side view which shows the mode at the time of attachment to the tube of the antistatic cover of FIG. (A) is a figure just before attachment to a tube, (b) is a figure after attachment to a tube, (c) is a figure after attachment to a tube thicker than the tube shown in (b). .

  A preferred embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 shows a usage state of an antistatic cover 1 according to an embodiment of the present invention.

As shown in FIG. 1, the antistatic cover 1 according to the present embodiment is used for a tube 2 that circulates a flammable fluid (electrical insulating fluid) such as an organic solvent, for example, to prevent charging. . The antistatic cover 1 can cover the outer periphery of the tube 2 and is formed to have a cylindrical shape in accordance with the cylindrical tube 2.

The tube 2 is an insulating resin tube formed substantially transparent or translucent in order to ensure the visibility inside. Examples of the insulating resin tube include a fluororesin tube. In the present embodiment, the tube 2 is made of PFA (
It is manufactured using a fluororesin such as perfluoroalkoxyalkane) and is formed to be transparent or translucent so that the inside can be seen.

FIG. 2 shows a front view of the antistatic cover 1. FIG. 3 shows a side view of the antistatic cover 1. FIG. 4 shows a plan view of the antistatic cover 1. FIG. 5 shows a bottom view of the antistatic cover 1. FIG. 6 is a development view of the antistatic cover 1. For convenience of explanation, FIG. 2 is enlarged.

As shown in FIGS. 1, 2, 3, 4, 5, and 6, the antistatic cover 1 includes a cover body 10. The cover body 10 is made of a resin composition containing a conductive substance. Examples of the resin composition include PP (polypropylene) containing a conductive material such as carbon black, carbon fiber, graphite, carbon fiber, metal fine powder, or a combination of two or more thereof.

The cover body 10 is formed in a cylindrical shape that can be fitted onto the tube 2. And
The cover body 10 is divided at one place in the circumferential direction so that the first dividing part 11 and the second dividing part 12 are formed, and the first dividing part 11 and the second dividing part 12 are brought close to or separated from each other. Thus, it is configured to be elastically deformable. In the present embodiment, the cover body 10 is formed in a cylindrical shape.

The first dividing portion 11 is disposed on one end side in the circumferential direction of the cover body 10. The first dividing portion 11 is formed with a circumferential end surface 13 extending in the axial direction of the cover body 10. On the other hand, the second dividing portion 12 is disposed on the other circumferential end side of the cover body 10. The second dividing portion 12 includes a circumferential other end surface 1 extending in the axial direction of the cover body 10.
4 is formed.

The cover body 10 is elastically deformed so as to separate the first dividing portion 11 and the second dividing portion 12, and the tube 2 is moved to the first dividing portion 11 and the second dividing portion 12. It is comprised so that it can pass between. During this elastic deformation, the inner diameter (the radial width on the inner peripheral side) of the cover body 10 can be changed larger than the outer diameter of the tube 2.

Specifically, as shown in FIG. 3, the cover body 10 includes the first dividing part 11 and the second part.
It is comprised so that the normal form close | similar to the grade which contacts the parting part 12 can be taken. This normal form is a form when the antistatic cover 1 is not attached to the tube 2. In this form, the inner diameter of the cover body 10 is substantially the same or smaller than the outer diameter of the tube 2. .

Further, as shown in FIG. 7A, the cover main body 10 has the first dividing portion 11 and the second dividing portion 1 to generate a space 15 through which the tube 2 can pass by elastic deformation.
It is comprised so that 2 can be taken and the deformation | transformation form which notched some circles by the side view can be taken. This modified form is a temporary form when the antistatic cover 1 is attached to and detached from the tube 2. In this form, the inner diameter of the cover body 10 is larger than that of the first form.

In such a configuration, when the antistatic cover 1 is attached to the tube 2 for use, first, an external force is applied to the antistatic cover 1 in order to deform the cover body 10. Thereby, the antistatic cover 1 is changed from the normal form shown in FIG. 3 to the modified form shown in FIG. 7A, and the tube 2 is placed between the first dividing part 11 and the second dividing part 12. The space 15 that can be passed is formed.

Next, the tube 2 is moved from the space 15 located between the first dividing portion 11 and the second dividing portion 12 into the cover main body 10. After the movement, the elastic recovery of the cover main body 10 is advanced so that the cover main body 10 fits over the tube 2. As a result, as shown in FIG. 1 and FIG. 7B, the antistatic cover 1 can be changed to a covering form, and the tube 2 can be kept covered with the cover body 10 and surrounded.

On the other hand, when removing the antistatic cover 1 from the tube 2, the cover body 10
In order to deform the antistatic cover 1, an external force is applied to the antistatic cover 1. And the said antistatic cover 1 is changed from a covering form to a deformation | transformation form, and the said 1st part part 11 and the said 2nd part part 12 are changed.
The tube 2 is moved toward the outside of the cover main body 10 from the space 15 located between them. As a result, as shown in FIG. 3, the antistatic cover 1 can be returned to the normal form.

Further, in the antistatic cover 1, the cover body 10 has a plurality of notches. The plurality of notches are for exposing a part of the tube 2 when the cover body 10 is externally fitted to the tube 2, and the first dividing portion 11 and the second dividing portion 12. Are provided so as to penetrate at least one of them in the radial direction of the cover main body 10.

In the present embodiment, the cover main body 10 has a plurality of first cutout portions 17, 17... As the plurality of cutout portions. In the present embodiment, the plurality of first cutout portions 17.
17 ... is formed by cutting out the first dividing portion 11 (the circumferential end surface 13).

The plurality of first cutout portions 17, 17... Are arranged at predetermined intervals in the axial direction of the cover body 10. Specifically, the plurality of first cutout portions 17, 17... Are identical long hole cutout portions extending from the circumferential end surface 13 to the middle of the cover body 10 in the circumferential direction (near the center). The cover main body 10 is arranged at substantially equal intervals in the axial direction.

In the present embodiment, the cover body 10 further includes a plurality of second cutout portions 18, 18... As the plurality of cutout portions. The plurality of second cutout portions 18, 18...
The second dividing portion 12 is provided so as to penetrate the cover main body 10 in the radial direction. In the present embodiment, the plurality of second cutout portions 18, 18... Are formed by cutting out the second dividing portion 12 (the other circumferential end surface 14).

The plurality of second cutouts 18, 18... Are arranged at predetermined intervals in the axial direction of the cover body 10. Specifically, the plurality of second cutout portions 18, 18... Are the same-shaped long-hole cutout portions extending from the other circumferential end surface 14 to the middle of the cover body 10 in the circumferential direction (near the center). The cover main body 10 is arranged at substantially equal intervals in the axial direction.

In the present embodiment, the plurality of second cutout portions 18, 18 ... are formed in substantially the same shape as the plurality of first cutout portions 17, 17 ..., and the plurality of first cutout portions. 17.1
As many as 7... As shown in FIG. 6, the plurality of second cutout portions 18, 18... Are arranged symmetrically with respect to the center line 19 in the short direction of the cover body 10 when unfolded.

From the above, according to the antistatic cover 1, the cover main body 10 is elastically deformed so that the space between the first dividing portion 11 and the second dividing portion 12 is widened when the tube 2 is attached or detached. Thus, the tube 2 can be covered or removed from one side. Therefore, the antistatic cover 1 can be easily attached to and detached from the tube 2 regardless of whether the tube 2 is an existing tube before being installed at a predetermined position in a factory or the like. Therefore, the attachment / detachment of the antistatic cover 1 to the tube 2 can be facilitated.

Further, according to the antistatic cover 1, since the elastic deformation of the cover body 1 is used for attaching to and detaching from the tube 2, the antistatic cover 1 is made to have an inner diameter of the cover body 10 in a normal configuration. In addition to attaching to and detaching from the tube 2 having substantially the same outer diameter,
As shown in FIG. 7C, the thick tube 20 having an outer diameter larger than the inner diameter of the cover body 10 can be attached and detached within a predetermined allowable range. Therefore, the antistatic cover 1 can be used for a plurality of tubes 2 and 20 having different outer diameters instead of a single type of tube having a predetermined outer diameter.

Furthermore, according to the antistatic cover 1, the tube 2 is attached after being attached to the tube 2.
Can be covered over a wide range with the cover body 10 relatively without interruption. Moreover, as shown in FIG. 7C, even when the tube 2 is the thick tube 20 and cannot be covered with the cover body 10, the necessary portion of the tube 2 is covered. Even if the cover main body 10 is rotated relative to the tube 2, and the deviation of the fluid due to the installation status of the tube 2 and the flow rate of the fluid occurs in the tube 2, the tube It is possible to reliably perform the charge removal of 2. Therefore, it is possible to increase the certainty of the antistatic of the tube 2 using the antistatic cover 1.

Further, according to the antistatic cover 1, the plurality of first cutout portions 1 are formed in the cover body 10.
7.17 ... (In the present embodiment, the plurality of second cutout portions 18, 18 ...
) Is provided, the antistatic cover 1 can be flexible. Therefore, for example, even if the tube 2 is an existing tube installed at a predetermined position in a factory or the like in a bent state, the antistatic cover 1 can be easily attached while being bent along the tube 2. Can do.

Moreover, when the tube 2 is covered with the antistatic cover 1, the plurality of first cutout portions 17, 17... (In the present embodiment, the plurality of second cutout portions 18, 18.
It becomes possible to expose a part of the tube 2 that is transparent or translucent via.
Therefore, after the tube 2 is covered with the antistatic cover 1, the plurality of first cutout portions 17, 17... (The plurality of second cutout portions 18, 18...) Are used. 2
The internal state (for example, the clogging state or the flow direction of the insulating fluid) can be visually confirmed.

As shown in FIGS. 1 to 6, in the antistatic cover 1, the cover body 1
0 has a plurality of through holes 21. The plurality of through holes 21.
Is for exposing a part of the tube 2 when the cover body 10 is externally fitted to the tube 2, and is provided so as to penetrate the cover body 10 in the radial direction.

In the present embodiment, the plurality of through holes 21, 21... Are arranged at predetermined intervals in the axial direction of the cover body 10. Specifically, the plurality of through holes 21.
Is a long hole-like through hole having the same shape extending in the circumferential direction of the cover body 10 between the circumferential one end surface 13 and the other circumferential end surface 14, and is substantially in the axial direction of the cover body 10. They are evenly spaced.

The plurality of through holes 21, 21,... Are formed in the plurality of first notches 17, 17,.
.. And the plurality of second cutout portions 18, 18... Are adjacent to each other and are alternately arranged with respect to the cutout portions 17 and 18 in the axial direction. The through hole 21 is formed so as to have a width in the axial direction that is substantially the same as or smaller than that of the first notch 17 and the second notch 18.

With such a configuration, when the tube 2 is covered with the antistatic cover 1, a part of the transparent or translucent tube is exposed through the plurality of through holes 21. It becomes possible. Therefore, after covering the tube 2 with the antistatic cover 1,
The state in the tube 2 (for example, the clogging state or the flow direction of the insulating fluid) can be visually confirmed from the plurality of through holes 21. Therefore, the antistatic cover 1
The visibility of the inside of the tube 2 during use can be enhanced.

Here, the plurality of through-holes 21, 21... Are within a range that does not cause defects related to attachment / antistatic prevention of the antistatic cover 1 to the tube 2.
... and the plurality of first cutout portions 17, 17 ... (and the plurality of second cutout portions 18,.
18)) is preferably set so that the total sum of the axial widths of each of them is 30% or more of the axial width of the cover body 10.

As shown in FIG. 3, in the antistatic cover 1, the cover body 10 is formed in a cylindrical shape in a state where the first dividing portion 11 and the second dividing portion 12 are overlapped. In the present embodiment, when the antistatic cover 1 takes a normal form, the second dividing portion 12 is disposed radially inward of the first dividing portion 11, and the first dividing portion 11 and the first dividing portion 11 are arranged. The overlapping portion 25 where the two-divided portion 12 overlaps is provided in a part of the cover body 1 in the circumferential direction.

When the antistatic cover 1 is changed from the normal form shown in FIG. 3 to the deformed form shown in FIG. 7A, the cover main body 10 is elastically deformed to cause the first dividing portion 11 and the second splitting part 11 to move. The space having an interval that allows the tube 2 to pass between the first dividing portion 11 and the second dividing portion 12 by being relatively moved in the circumferential direction of the cover main body 10 so as to be separated from the dividing portion 12. 15 can be secured.

With such a configuration, it is possible to expand the change range of the inner diameter (the radial width on the inner peripheral side) that the cover body 10 can take according to elastic deformation. Therefore, the antistatic cover 1 can be used for many types of tubes having different outer diameters.

1, 4, and 6, in the antistatic cover 1, the plurality of first cutout portions 17, 17... And the plurality of second cutout portions 18, 18. The closed portion of at least one of the cutouts is rounded. In the present embodiment, rounded portions are applied to the respective closed portions 27 and 28 of the plurality of first cutout portions 17, 17... And the plurality of second cutout portions 18, 18. .

As shown in FIG. 6, the closing part 27 of the first notch 17 and the closing part 28 of the second notch 18 are symmetrical with respect to the center line 19 in the short direction of the cover body 10 when deployed. It is formed in a simple shape. Specifically, the closing part 27 of the first cutout part 17 is formed of the second dividing part 1.
It is formed in a curved (arc) shape that is convex toward the second side. The closing portion 28 of the second cutout portion 18 is formed in a curved (arc) shape that protrudes toward the first dividing portion 11 side.

With such a configuration, between the close portions 27 and 28 (near) in the cover body,
At least one winding portion 31 on which a metal wire 30 such as a copper wire connected to the ground wire can be wound can be formed (see FIG. 1). And when the said metal wire 30 is wound around the said winding part 31, it prevents that the said metal wire 30 damages the said obstruction | occlusion part 27 * 28 which contacts this, and does not damage the said antistatic cover 1 easily. can do.

As shown in FIGS. 1 and 3, in the antistatic cover 1, the openings of the plurality of first cutout portions 17, 17... And the plurality of second cutout portions 18, 18. Edge 33
・ 34 has been chamfered. That is, the circumferential direction one end face 13 and the other end face 14.
The opening edges 33 and 34 located on the other circumferential end face are chamfered.

With such a configuration, when the antistatic cover 1 is attached to or detached from the tube 2, the tube 2 is less likely to be damaged due to contact between the cover body 10 and the tube 2. .

In the present embodiment, the plurality of cutout portions according to the present invention include the plurality of first cutout portions 17, 17... Formed in each of the first cutout portion 11 and the second cutout portion 12. The plurality of second cutout portions 18, 18... May be a plurality of cutout portions formed only in one of the first divided portion and the second divided portion.

Further, the plurality of cutout portions according to the present invention are the plurality of first cutout portions 17 which are long hole cutout portions.
... And the plurality of second cutout portions 18, 18..., But when the cover body is fitted on the tube, a part of the tube is exposed through the plurality of cutout portions. For example, a plurality of cutout portions having an arc shape shorter than that of the present embodiment in the circumferential direction of the cover main body may be used.

The plurality of notches according to the present invention are substantially the same shape in the present embodiment.
.. And the plurality of second notches 18... Are not limited to this, but may be a plurality of notches having different shapes, or a predetermined number. A plurality of notches including a group of notches having a shape and other notches having a different shape may be used.

In addition, the plurality of through holes according to the present invention are the plurality of through holes 21.
1... However, it is sufficient that the cover main body can be partially exposed through the plurality of through holes when the cover main body is externally fitted to the tube. A plurality of through-holes having a shape shorter than that of the present embodiment in the circumferential direction may be used.

In the present embodiment, the plurality of through holes according to the present invention are the plurality of through holes 21, 21... Having substantially the same shape. However, the present invention is not limited to this. It may be a plurality of through holes, or may be a plurality of notches including a group of through holes having a predetermined shape and other through holes having different shapes.

Further, the number of notches according to the present invention is not limited to the number of the present embodiment (9),
Any number may be used in consideration of the visibility inside the tube. The number of through holes according to the present invention is not limited to the number (10) of the present embodiment, and may be any number depending on the necessity for visual recognition inside the tube.

DESCRIPTION OF SYMBOLS 1 Antistatic cover 2 Tube 10 Cover main body 11 1st part part 12 2nd part part 17 1st notch part 18 2nd notch part 20 Thick tube 21 Through-hole 27 Blocking part of 1st notch part 28 Blocking of 2nd notch part Part 33 Opening edge of first notch part 34 Opening edge of second notch part

Claims (5)

An antistatic cover covering a transparent or translucent insulating resin tube,
It consists of a resin composition containing a conductive substance, and includes a cylindrical cover body that can be fitted onto the tube,
The cover main body is divided at one place in the circumferential direction so as to form the first divided portion and the second divided portion, and is elastically deformed so as to make the first divided portion and the second divided portion approach or separate from each other. Is possible,
The cover main body is elastically deformed so as to separate the first divided portion and the second divided portion, so that the tube can pass between the first divided portion and the second divided portion. Composed and
The cover main body has a plurality of cutout portions penetrating at least one of the first divided portion and the second divided portion in the radial direction of the cover main body, and the plurality of cutouts are fitted to the tube. An antistatic cover characterized in that a part of the tube can be exposed through the portion. The cover body has a plurality of through holes penetrating in the radial direction of the cover body, and a part of the tube can be exposed through the plurality of through holes when the cover body is externally fitted to the tube. The antistatic cover according to claim 1, wherein the antistatic cover is configured as described above. 3. The antistatic cover according to claim 1, wherein the cover body is formed in a cylindrical shape in a state where the first divided portion and the second divided portion are overlapped with each other. The antistatic cover according to any one of claims 1 to 3, wherein the closed portion of at least one of the plurality of cutout portions is rounded. The antistatic cover according to claim 1, wherein chamfering is performed on each opening edge of the plurality of notches.

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